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-rw-r--r--fs/smb/server/smb2pdu.c8662
1 files changed, 8662 insertions, 0 deletions
diff --git a/fs/smb/server/smb2pdu.c b/fs/smb/server/smb2pdu.c
new file mode 100644
index 0000000000..6ddfe3fef5
--- /dev/null
+++ b/fs/smb/server/smb2pdu.c
@@ -0,0 +1,8662 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2016 Namjae Jeon <linkinjeon@kernel.org>
+ * Copyright (C) 2018 Samsung Electronics Co., Ltd.
+ */
+
+#include <linux/inetdevice.h>
+#include <net/addrconf.h>
+#include <linux/syscalls.h>
+#include <linux/namei.h>
+#include <linux/statfs.h>
+#include <linux/ethtool.h>
+#include <linux/falloc.h>
+#include <linux/mount.h>
+#include <linux/filelock.h>
+
+#include "glob.h"
+#include "smbfsctl.h"
+#include "oplock.h"
+#include "smbacl.h"
+
+#include "auth.h"
+#include "asn1.h"
+#include "connection.h"
+#include "transport_ipc.h"
+#include "transport_rdma.h"
+#include "vfs.h"
+#include "vfs_cache.h"
+#include "misc.h"
+
+#include "server.h"
+#include "smb_common.h"
+#include "smbstatus.h"
+#include "ksmbd_work.h"
+#include "mgmt/user_config.h"
+#include "mgmt/share_config.h"
+#include "mgmt/tree_connect.h"
+#include "mgmt/user_session.h"
+#include "mgmt/ksmbd_ida.h"
+#include "ndr.h"
+
+static void __wbuf(struct ksmbd_work *work, void **req, void **rsp)
+{
+ if (work->next_smb2_rcv_hdr_off) {
+ *req = ksmbd_req_buf_next(work);
+ *rsp = ksmbd_resp_buf_next(work);
+ } else {
+ *req = smb2_get_msg(work->request_buf);
+ *rsp = smb2_get_msg(work->response_buf);
+ }
+}
+
+#define WORK_BUFFERS(w, rq, rs) __wbuf((w), (void **)&(rq), (void **)&(rs))
+
+/**
+ * check_session_id() - check for valid session id in smb header
+ * @conn: connection instance
+ * @id: session id from smb header
+ *
+ * Return: 1 if valid session id, otherwise 0
+ */
+static inline bool check_session_id(struct ksmbd_conn *conn, u64 id)
+{
+ struct ksmbd_session *sess;
+
+ if (id == 0 || id == -1)
+ return false;
+
+ sess = ksmbd_session_lookup_all(conn, id);
+ if (sess)
+ return true;
+ pr_err("Invalid user session id: %llu\n", id);
+ return false;
+}
+
+struct channel *lookup_chann_list(struct ksmbd_session *sess, struct ksmbd_conn *conn)
+{
+ return xa_load(&sess->ksmbd_chann_list, (long)conn);
+}
+
+/**
+ * smb2_get_ksmbd_tcon() - get tree connection information using a tree id.
+ * @work: smb work
+ *
+ * Return: 0 if there is a tree connection matched or these are
+ * skipable commands, otherwise error
+ */
+int smb2_get_ksmbd_tcon(struct ksmbd_work *work)
+{
+ struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
+ unsigned int cmd = le16_to_cpu(req_hdr->Command);
+ unsigned int tree_id;
+
+ if (cmd == SMB2_TREE_CONNECT_HE ||
+ cmd == SMB2_CANCEL_HE ||
+ cmd == SMB2_LOGOFF_HE) {
+ ksmbd_debug(SMB, "skip to check tree connect request\n");
+ return 0;
+ }
+
+ if (xa_empty(&work->sess->tree_conns)) {
+ ksmbd_debug(SMB, "NO tree connected\n");
+ return -ENOENT;
+ }
+
+ tree_id = le32_to_cpu(req_hdr->Id.SyncId.TreeId);
+
+ /*
+ * If request is not the first in Compound request,
+ * Just validate tree id in header with work->tcon->id.
+ */
+ if (work->next_smb2_rcv_hdr_off) {
+ if (!work->tcon) {
+ pr_err("The first operation in the compound does not have tcon\n");
+ return -EINVAL;
+ }
+ if (tree_id != UINT_MAX && work->tcon->id != tree_id) {
+ pr_err("tree id(%u) is different with id(%u) in first operation\n",
+ tree_id, work->tcon->id);
+ return -EINVAL;
+ }
+ return 1;
+ }
+
+ work->tcon = ksmbd_tree_conn_lookup(work->sess, tree_id);
+ if (!work->tcon) {
+ pr_err("Invalid tid %d\n", tree_id);
+ return -ENOENT;
+ }
+
+ return 1;
+}
+
+/**
+ * smb2_set_err_rsp() - set error response code on smb response
+ * @work: smb work containing response buffer
+ */
+void smb2_set_err_rsp(struct ksmbd_work *work)
+{
+ struct smb2_err_rsp *err_rsp;
+
+ if (work->next_smb2_rcv_hdr_off)
+ err_rsp = ksmbd_resp_buf_next(work);
+ else
+ err_rsp = smb2_get_msg(work->response_buf);
+
+ if (err_rsp->hdr.Status != STATUS_STOPPED_ON_SYMLINK) {
+ int err;
+
+ err_rsp->StructureSize = SMB2_ERROR_STRUCTURE_SIZE2_LE;
+ err_rsp->ErrorContextCount = 0;
+ err_rsp->Reserved = 0;
+ err_rsp->ByteCount = 0;
+ err_rsp->ErrorData[0] = 0;
+ err = ksmbd_iov_pin_rsp(work, (void *)err_rsp,
+ __SMB2_HEADER_STRUCTURE_SIZE +
+ SMB2_ERROR_STRUCTURE_SIZE2);
+ if (err)
+ work->send_no_response = 1;
+ }
+}
+
+/**
+ * is_smb2_neg_cmd() - is it smb2 negotiation command
+ * @work: smb work containing smb header
+ *
+ * Return: true if smb2 negotiation command, otherwise false
+ */
+bool is_smb2_neg_cmd(struct ksmbd_work *work)
+{
+ struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
+
+ /* is it SMB2 header ? */
+ if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
+ return false;
+
+ /* make sure it is request not response message */
+ if (hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR)
+ return false;
+
+ if (hdr->Command != SMB2_NEGOTIATE)
+ return false;
+
+ return true;
+}
+
+/**
+ * is_smb2_rsp() - is it smb2 response
+ * @work: smb work containing smb response buffer
+ *
+ * Return: true if smb2 response, otherwise false
+ */
+bool is_smb2_rsp(struct ksmbd_work *work)
+{
+ struct smb2_hdr *hdr = smb2_get_msg(work->response_buf);
+
+ /* is it SMB2 header ? */
+ if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
+ return false;
+
+ /* make sure it is response not request message */
+ if (!(hdr->Flags & SMB2_FLAGS_SERVER_TO_REDIR))
+ return false;
+
+ return true;
+}
+
+/**
+ * get_smb2_cmd_val() - get smb command code from smb header
+ * @work: smb work containing smb request buffer
+ *
+ * Return: smb2 request command value
+ */
+u16 get_smb2_cmd_val(struct ksmbd_work *work)
+{
+ struct smb2_hdr *rcv_hdr;
+
+ if (work->next_smb2_rcv_hdr_off)
+ rcv_hdr = ksmbd_req_buf_next(work);
+ else
+ rcv_hdr = smb2_get_msg(work->request_buf);
+ return le16_to_cpu(rcv_hdr->Command);
+}
+
+/**
+ * set_smb2_rsp_status() - set error response code on smb2 header
+ * @work: smb work containing response buffer
+ * @err: error response code
+ */
+void set_smb2_rsp_status(struct ksmbd_work *work, __le32 err)
+{
+ struct smb2_hdr *rsp_hdr;
+
+ rsp_hdr = smb2_get_msg(work->response_buf);
+ rsp_hdr->Status = err;
+
+ work->iov_idx = 0;
+ work->iov_cnt = 0;
+ work->next_smb2_rcv_hdr_off = 0;
+ smb2_set_err_rsp(work);
+}
+
+/**
+ * init_smb2_neg_rsp() - initialize smb2 response for negotiate command
+ * @work: smb work containing smb request buffer
+ *
+ * smb2 negotiate response is sent in reply of smb1 negotiate command for
+ * dialect auto-negotiation.
+ */
+int init_smb2_neg_rsp(struct ksmbd_work *work)
+{
+ struct smb2_hdr *rsp_hdr;
+ struct smb2_negotiate_rsp *rsp;
+ struct ksmbd_conn *conn = work->conn;
+ int err;
+
+ rsp_hdr = smb2_get_msg(work->response_buf);
+ memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
+ rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
+ rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
+ rsp_hdr->CreditRequest = cpu_to_le16(2);
+ rsp_hdr->Command = SMB2_NEGOTIATE;
+ rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
+ rsp_hdr->NextCommand = 0;
+ rsp_hdr->MessageId = 0;
+ rsp_hdr->Id.SyncId.ProcessId = 0;
+ rsp_hdr->Id.SyncId.TreeId = 0;
+ rsp_hdr->SessionId = 0;
+ memset(rsp_hdr->Signature, 0, 16);
+
+ rsp = smb2_get_msg(work->response_buf);
+
+ WARN_ON(ksmbd_conn_good(conn));
+
+ rsp->StructureSize = cpu_to_le16(65);
+ ksmbd_debug(SMB, "conn->dialect 0x%x\n", conn->dialect);
+ rsp->DialectRevision = cpu_to_le16(conn->dialect);
+ /* Not setting conn guid rsp->ServerGUID, as it
+ * not used by client for identifying connection
+ */
+ rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
+ /* Default Max Message Size till SMB2.0, 64K*/
+ rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
+ rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
+ rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
+
+ rsp->SystemTime = cpu_to_le64(ksmbd_systime());
+ rsp->ServerStartTime = 0;
+
+ rsp->SecurityBufferOffset = cpu_to_le16(128);
+ rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
+ ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
+ le16_to_cpu(rsp->SecurityBufferOffset));
+ rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
+ if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY)
+ rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
+ err = ksmbd_iov_pin_rsp(work, rsp,
+ sizeof(struct smb2_negotiate_rsp) + AUTH_GSS_LENGTH);
+ if (err)
+ return err;
+ conn->use_spnego = true;
+
+ ksmbd_conn_set_need_negotiate(conn);
+ return 0;
+}
+
+/**
+ * smb2_set_rsp_credits() - set number of credits in response buffer
+ * @work: smb work containing smb response buffer
+ */
+int smb2_set_rsp_credits(struct ksmbd_work *work)
+{
+ struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
+ struct smb2_hdr *hdr = ksmbd_resp_buf_next(work);
+ struct ksmbd_conn *conn = work->conn;
+ unsigned short credits_requested, aux_max;
+ unsigned short credit_charge, credits_granted = 0;
+
+ if (work->send_no_response)
+ return 0;
+
+ hdr->CreditCharge = req_hdr->CreditCharge;
+
+ if (conn->total_credits > conn->vals->max_credits) {
+ hdr->CreditRequest = 0;
+ pr_err("Total credits overflow: %d\n", conn->total_credits);
+ return -EINVAL;
+ }
+
+ credit_charge = max_t(unsigned short,
+ le16_to_cpu(req_hdr->CreditCharge), 1);
+ if (credit_charge > conn->total_credits) {
+ ksmbd_debug(SMB, "Insufficient credits granted, given: %u, granted: %u\n",
+ credit_charge, conn->total_credits);
+ return -EINVAL;
+ }
+
+ conn->total_credits -= credit_charge;
+ conn->outstanding_credits -= credit_charge;
+ credits_requested = max_t(unsigned short,
+ le16_to_cpu(req_hdr->CreditRequest), 1);
+
+ /* according to smb2.credits smbtorture, Windows server
+ * 2016 or later grant up to 8192 credits at once.
+ *
+ * TODO: Need to adjuct CreditRequest value according to
+ * current cpu load
+ */
+ if (hdr->Command == SMB2_NEGOTIATE)
+ aux_max = 1;
+ else
+ aux_max = conn->vals->max_credits - conn->total_credits;
+ credits_granted = min_t(unsigned short, credits_requested, aux_max);
+
+ conn->total_credits += credits_granted;
+ work->credits_granted += credits_granted;
+
+ if (!req_hdr->NextCommand) {
+ /* Update CreditRequest in last request */
+ hdr->CreditRequest = cpu_to_le16(work->credits_granted);
+ }
+ ksmbd_debug(SMB,
+ "credits: requested[%d] granted[%d] total_granted[%d]\n",
+ credits_requested, credits_granted,
+ conn->total_credits);
+ return 0;
+}
+
+/**
+ * init_chained_smb2_rsp() - initialize smb2 chained response
+ * @work: smb work containing smb response buffer
+ */
+static void init_chained_smb2_rsp(struct ksmbd_work *work)
+{
+ struct smb2_hdr *req = ksmbd_req_buf_next(work);
+ struct smb2_hdr *rsp = ksmbd_resp_buf_next(work);
+ struct smb2_hdr *rsp_hdr;
+ struct smb2_hdr *rcv_hdr;
+ int next_hdr_offset = 0;
+ int len, new_len;
+
+ /* Len of this response = updated RFC len - offset of previous cmd
+ * in the compound rsp
+ */
+
+ /* Storing the current local FID which may be needed by subsequent
+ * command in the compound request
+ */
+ if (req->Command == SMB2_CREATE && rsp->Status == STATUS_SUCCESS) {
+ work->compound_fid = ((struct smb2_create_rsp *)rsp)->VolatileFileId;
+ work->compound_pfid = ((struct smb2_create_rsp *)rsp)->PersistentFileId;
+ work->compound_sid = le64_to_cpu(rsp->SessionId);
+ }
+
+ len = get_rfc1002_len(work->response_buf) - work->next_smb2_rsp_hdr_off;
+ next_hdr_offset = le32_to_cpu(req->NextCommand);
+
+ new_len = ALIGN(len, 8);
+ work->iov[work->iov_idx].iov_len += (new_len - len);
+ inc_rfc1001_len(work->response_buf, new_len - len);
+ rsp->NextCommand = cpu_to_le32(new_len);
+
+ work->next_smb2_rcv_hdr_off += next_hdr_offset;
+ work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off;
+ work->next_smb2_rsp_hdr_off += new_len;
+ ksmbd_debug(SMB,
+ "Compound req new_len = %d rcv off = %d rsp off = %d\n",
+ new_len, work->next_smb2_rcv_hdr_off,
+ work->next_smb2_rsp_hdr_off);
+
+ rsp_hdr = ksmbd_resp_buf_next(work);
+ rcv_hdr = ksmbd_req_buf_next(work);
+
+ if (!(rcv_hdr->Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
+ ksmbd_debug(SMB, "related flag should be set\n");
+ work->compound_fid = KSMBD_NO_FID;
+ work->compound_pfid = KSMBD_NO_FID;
+ }
+ memset((char *)rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
+ rsp_hdr->ProtocolId = SMB2_PROTO_NUMBER;
+ rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
+ rsp_hdr->Command = rcv_hdr->Command;
+
+ /*
+ * Message is response. We don't grant oplock yet.
+ */
+ rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR |
+ SMB2_FLAGS_RELATED_OPERATIONS);
+ rsp_hdr->NextCommand = 0;
+ rsp_hdr->MessageId = rcv_hdr->MessageId;
+ rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
+ rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
+ rsp_hdr->SessionId = rcv_hdr->SessionId;
+ memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
+}
+
+/**
+ * is_chained_smb2_message() - check for chained command
+ * @work: smb work containing smb request buffer
+ *
+ * Return: true if chained request, otherwise false
+ */
+bool is_chained_smb2_message(struct ksmbd_work *work)
+{
+ struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
+ unsigned int len, next_cmd;
+
+ if (hdr->ProtocolId != SMB2_PROTO_NUMBER)
+ return false;
+
+ hdr = ksmbd_req_buf_next(work);
+ next_cmd = le32_to_cpu(hdr->NextCommand);
+ if (next_cmd > 0) {
+ if ((u64)work->next_smb2_rcv_hdr_off + next_cmd +
+ __SMB2_HEADER_STRUCTURE_SIZE >
+ get_rfc1002_len(work->request_buf)) {
+ pr_err("next command(%u) offset exceeds smb msg size\n",
+ next_cmd);
+ return false;
+ }
+
+ if ((u64)get_rfc1002_len(work->response_buf) + MAX_CIFS_SMALL_BUFFER_SIZE >
+ work->response_sz) {
+ pr_err("next response offset exceeds response buffer size\n");
+ return false;
+ }
+
+ ksmbd_debug(SMB, "got SMB2 chained command\n");
+ init_chained_smb2_rsp(work);
+ return true;
+ } else if (work->next_smb2_rcv_hdr_off) {
+ /*
+ * This is last request in chained command,
+ * align response to 8 byte
+ */
+ len = ALIGN(get_rfc1002_len(work->response_buf), 8);
+ len = len - get_rfc1002_len(work->response_buf);
+ if (len) {
+ ksmbd_debug(SMB, "padding len %u\n", len);
+ work->iov[work->iov_idx].iov_len += len;
+ inc_rfc1001_len(work->response_buf, len);
+ }
+ work->curr_smb2_rsp_hdr_off = work->next_smb2_rsp_hdr_off;
+ }
+ return false;
+}
+
+/**
+ * init_smb2_rsp_hdr() - initialize smb2 response
+ * @work: smb work containing smb request buffer
+ *
+ * Return: 0
+ */
+int init_smb2_rsp_hdr(struct ksmbd_work *work)
+{
+ struct smb2_hdr *rsp_hdr = smb2_get_msg(work->response_buf);
+ struct smb2_hdr *rcv_hdr = smb2_get_msg(work->request_buf);
+
+ memset(rsp_hdr, 0, sizeof(struct smb2_hdr) + 2);
+ rsp_hdr->ProtocolId = rcv_hdr->ProtocolId;
+ rsp_hdr->StructureSize = SMB2_HEADER_STRUCTURE_SIZE;
+ rsp_hdr->Command = rcv_hdr->Command;
+
+ /*
+ * Message is response. We don't grant oplock yet.
+ */
+ rsp_hdr->Flags = (SMB2_FLAGS_SERVER_TO_REDIR);
+ rsp_hdr->NextCommand = 0;
+ rsp_hdr->MessageId = rcv_hdr->MessageId;
+ rsp_hdr->Id.SyncId.ProcessId = rcv_hdr->Id.SyncId.ProcessId;
+ rsp_hdr->Id.SyncId.TreeId = rcv_hdr->Id.SyncId.TreeId;
+ rsp_hdr->SessionId = rcv_hdr->SessionId;
+ memcpy(rsp_hdr->Signature, rcv_hdr->Signature, 16);
+
+ return 0;
+}
+
+/**
+ * smb2_allocate_rsp_buf() - allocate smb2 response buffer
+ * @work: smb work containing smb request buffer
+ *
+ * Return: 0 on success, otherwise -ENOMEM
+ */
+int smb2_allocate_rsp_buf(struct ksmbd_work *work)
+{
+ struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
+ size_t small_sz = MAX_CIFS_SMALL_BUFFER_SIZE;
+ size_t large_sz = small_sz + work->conn->vals->max_trans_size;
+ size_t sz = small_sz;
+ int cmd = le16_to_cpu(hdr->Command);
+
+ if (cmd == SMB2_IOCTL_HE || cmd == SMB2_QUERY_DIRECTORY_HE)
+ sz = large_sz;
+
+ if (cmd == SMB2_QUERY_INFO_HE) {
+ struct smb2_query_info_req *req;
+
+ req = smb2_get_msg(work->request_buf);
+ if ((req->InfoType == SMB2_O_INFO_FILE &&
+ (req->FileInfoClass == FILE_FULL_EA_INFORMATION ||
+ req->FileInfoClass == FILE_ALL_INFORMATION)) ||
+ req->InfoType == SMB2_O_INFO_SECURITY)
+ sz = large_sz;
+ }
+
+ /* allocate large response buf for chained commands */
+ if (le32_to_cpu(hdr->NextCommand) > 0)
+ sz = large_sz;
+
+ work->response_buf = kvzalloc(sz, GFP_KERNEL);
+ if (!work->response_buf)
+ return -ENOMEM;
+
+ work->response_sz = sz;
+ return 0;
+}
+
+/**
+ * smb2_check_user_session() - check for valid session for a user
+ * @work: smb work containing smb request buffer
+ *
+ * Return: 0 on success, otherwise error
+ */
+int smb2_check_user_session(struct ksmbd_work *work)
+{
+ struct smb2_hdr *req_hdr = ksmbd_req_buf_next(work);
+ struct ksmbd_conn *conn = work->conn;
+ unsigned int cmd = le16_to_cpu(req_hdr->Command);
+ unsigned long long sess_id;
+
+ /*
+ * SMB2_ECHO, SMB2_NEGOTIATE, SMB2_SESSION_SETUP command do not
+ * require a session id, so no need to validate user session's for
+ * these commands.
+ */
+ if (cmd == SMB2_ECHO_HE || cmd == SMB2_NEGOTIATE_HE ||
+ cmd == SMB2_SESSION_SETUP_HE)
+ return 0;
+
+ if (!ksmbd_conn_good(conn))
+ return -EIO;
+
+ sess_id = le64_to_cpu(req_hdr->SessionId);
+
+ /*
+ * If request is not the first in Compound request,
+ * Just validate session id in header with work->sess->id.
+ */
+ if (work->next_smb2_rcv_hdr_off) {
+ if (!work->sess) {
+ pr_err("The first operation in the compound does not have sess\n");
+ return -EINVAL;
+ }
+ if (sess_id != ULLONG_MAX && work->sess->id != sess_id) {
+ pr_err("session id(%llu) is different with the first operation(%lld)\n",
+ sess_id, work->sess->id);
+ return -EINVAL;
+ }
+ return 1;
+ }
+
+ /* Check for validity of user session */
+ work->sess = ksmbd_session_lookup_all(conn, sess_id);
+ if (work->sess)
+ return 1;
+ ksmbd_debug(SMB, "Invalid user session, Uid %llu\n", sess_id);
+ return -ENOENT;
+}
+
+static void destroy_previous_session(struct ksmbd_conn *conn,
+ struct ksmbd_user *user, u64 id)
+{
+ struct ksmbd_session *prev_sess = ksmbd_session_lookup_slowpath(id);
+ struct ksmbd_user *prev_user;
+ struct channel *chann;
+ long index;
+
+ if (!prev_sess)
+ return;
+
+ prev_user = prev_sess->user;
+
+ if (!prev_user ||
+ strcmp(user->name, prev_user->name) ||
+ user->passkey_sz != prev_user->passkey_sz ||
+ memcmp(user->passkey, prev_user->passkey, user->passkey_sz))
+ return;
+
+ prev_sess->state = SMB2_SESSION_EXPIRED;
+ xa_for_each(&prev_sess->ksmbd_chann_list, index, chann)
+ ksmbd_conn_set_exiting(chann->conn);
+}
+
+/**
+ * smb2_get_name() - get filename string from on the wire smb format
+ * @src: source buffer
+ * @maxlen: maxlen of source string
+ * @local_nls: nls_table pointer
+ *
+ * Return: matching converted filename on success, otherwise error ptr
+ */
+static char *
+smb2_get_name(const char *src, const int maxlen, struct nls_table *local_nls)
+{
+ char *name;
+
+ name = smb_strndup_from_utf16(src, maxlen, 1, local_nls);
+ if (IS_ERR(name)) {
+ pr_err("failed to get name %ld\n", PTR_ERR(name));
+ return name;
+ }
+
+ ksmbd_conv_path_to_unix(name);
+ ksmbd_strip_last_slash(name);
+ return name;
+}
+
+int setup_async_work(struct ksmbd_work *work, void (*fn)(void **), void **arg)
+{
+ struct ksmbd_conn *conn = work->conn;
+ int id;
+
+ id = ksmbd_acquire_async_msg_id(&conn->async_ida);
+ if (id < 0) {
+ pr_err("Failed to alloc async message id\n");
+ return id;
+ }
+ work->asynchronous = true;
+ work->async_id = id;
+
+ ksmbd_debug(SMB,
+ "Send interim Response to inform async request id : %d\n",
+ work->async_id);
+
+ work->cancel_fn = fn;
+ work->cancel_argv = arg;
+
+ if (list_empty(&work->async_request_entry)) {
+ spin_lock(&conn->request_lock);
+ list_add_tail(&work->async_request_entry, &conn->async_requests);
+ spin_unlock(&conn->request_lock);
+ }
+
+ return 0;
+}
+
+void release_async_work(struct ksmbd_work *work)
+{
+ struct ksmbd_conn *conn = work->conn;
+
+ spin_lock(&conn->request_lock);
+ list_del_init(&work->async_request_entry);
+ spin_unlock(&conn->request_lock);
+
+ work->asynchronous = 0;
+ work->cancel_fn = NULL;
+ kfree(work->cancel_argv);
+ work->cancel_argv = NULL;
+ if (work->async_id) {
+ ksmbd_release_id(&conn->async_ida, work->async_id);
+ work->async_id = 0;
+ }
+}
+
+void smb2_send_interim_resp(struct ksmbd_work *work, __le32 status)
+{
+ struct smb2_hdr *rsp_hdr;
+ struct ksmbd_work *in_work = ksmbd_alloc_work_struct();
+
+ if (allocate_interim_rsp_buf(in_work)) {
+ pr_err("smb_allocate_rsp_buf failed!\n");
+ ksmbd_free_work_struct(in_work);
+ return;
+ }
+
+ in_work->conn = work->conn;
+ memcpy(smb2_get_msg(in_work->response_buf), ksmbd_resp_buf_next(work),
+ __SMB2_HEADER_STRUCTURE_SIZE);
+
+ rsp_hdr = smb2_get_msg(in_work->response_buf);
+ rsp_hdr->Flags |= SMB2_FLAGS_ASYNC_COMMAND;
+ rsp_hdr->Id.AsyncId = cpu_to_le64(work->async_id);
+ smb2_set_err_rsp(in_work);
+ rsp_hdr->Status = status;
+
+ ksmbd_conn_write(in_work);
+ ksmbd_free_work_struct(in_work);
+}
+
+static __le32 smb2_get_reparse_tag_special_file(umode_t mode)
+{
+ if (S_ISDIR(mode) || S_ISREG(mode))
+ return 0;
+
+ if (S_ISLNK(mode))
+ return IO_REPARSE_TAG_LX_SYMLINK_LE;
+ else if (S_ISFIFO(mode))
+ return IO_REPARSE_TAG_LX_FIFO_LE;
+ else if (S_ISSOCK(mode))
+ return IO_REPARSE_TAG_AF_UNIX_LE;
+ else if (S_ISCHR(mode))
+ return IO_REPARSE_TAG_LX_CHR_LE;
+ else if (S_ISBLK(mode))
+ return IO_REPARSE_TAG_LX_BLK_LE;
+
+ return 0;
+}
+
+/**
+ * smb2_get_dos_mode() - get file mode in dos format from unix mode
+ * @stat: kstat containing file mode
+ * @attribute: attribute flags
+ *
+ * Return: converted dos mode
+ */
+static int smb2_get_dos_mode(struct kstat *stat, int attribute)
+{
+ int attr = 0;
+
+ if (S_ISDIR(stat->mode)) {
+ attr = FILE_ATTRIBUTE_DIRECTORY |
+ (attribute & (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM));
+ } else {
+ attr = (attribute & 0x00005137) | FILE_ATTRIBUTE_ARCHIVE;
+ attr &= ~(FILE_ATTRIBUTE_DIRECTORY);
+ if (S_ISREG(stat->mode) && (server_conf.share_fake_fscaps &
+ FILE_SUPPORTS_SPARSE_FILES))
+ attr |= FILE_ATTRIBUTE_SPARSE_FILE;
+
+ if (smb2_get_reparse_tag_special_file(stat->mode))
+ attr |= FILE_ATTRIBUTE_REPARSE_POINT;
+ }
+
+ return attr;
+}
+
+static void build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt,
+ __le16 hash_id)
+{
+ pneg_ctxt->ContextType = SMB2_PREAUTH_INTEGRITY_CAPABILITIES;
+ pneg_ctxt->DataLength = cpu_to_le16(38);
+ pneg_ctxt->HashAlgorithmCount = cpu_to_le16(1);
+ pneg_ctxt->Reserved = cpu_to_le32(0);
+ pneg_ctxt->SaltLength = cpu_to_le16(SMB311_SALT_SIZE);
+ get_random_bytes(pneg_ctxt->Salt, SMB311_SALT_SIZE);
+ pneg_ctxt->HashAlgorithms = hash_id;
+}
+
+static void build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt,
+ __le16 cipher_type)
+{
+ pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
+ pneg_ctxt->DataLength = cpu_to_le16(4);
+ pneg_ctxt->Reserved = cpu_to_le32(0);
+ pneg_ctxt->CipherCount = cpu_to_le16(1);
+ pneg_ctxt->Ciphers[0] = cipher_type;
+}
+
+static void build_sign_cap_ctxt(struct smb2_signing_capabilities *pneg_ctxt,
+ __le16 sign_algo)
+{
+ pneg_ctxt->ContextType = SMB2_SIGNING_CAPABILITIES;
+ pneg_ctxt->DataLength =
+ cpu_to_le16((sizeof(struct smb2_signing_capabilities) + 2)
+ - sizeof(struct smb2_neg_context));
+ pneg_ctxt->Reserved = cpu_to_le32(0);
+ pneg_ctxt->SigningAlgorithmCount = cpu_to_le16(1);
+ pneg_ctxt->SigningAlgorithms[0] = sign_algo;
+}
+
+static void build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt)
+{
+ pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE;
+ pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
+ /* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
+ pneg_ctxt->Name[0] = 0x93;
+ pneg_ctxt->Name[1] = 0xAD;
+ pneg_ctxt->Name[2] = 0x25;
+ pneg_ctxt->Name[3] = 0x50;
+ pneg_ctxt->Name[4] = 0x9C;
+ pneg_ctxt->Name[5] = 0xB4;
+ pneg_ctxt->Name[6] = 0x11;
+ pneg_ctxt->Name[7] = 0xE7;
+ pneg_ctxt->Name[8] = 0xB4;
+ pneg_ctxt->Name[9] = 0x23;
+ pneg_ctxt->Name[10] = 0x83;
+ pneg_ctxt->Name[11] = 0xDE;
+ pneg_ctxt->Name[12] = 0x96;
+ pneg_ctxt->Name[13] = 0x8B;
+ pneg_ctxt->Name[14] = 0xCD;
+ pneg_ctxt->Name[15] = 0x7C;
+}
+
+static unsigned int assemble_neg_contexts(struct ksmbd_conn *conn,
+ struct smb2_negotiate_rsp *rsp)
+{
+ char * const pneg_ctxt = (char *)rsp +
+ le32_to_cpu(rsp->NegotiateContextOffset);
+ int neg_ctxt_cnt = 1;
+ int ctxt_size;
+
+ ksmbd_debug(SMB,
+ "assemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
+ build_preauth_ctxt((struct smb2_preauth_neg_context *)pneg_ctxt,
+ conn->preauth_info->Preauth_HashId);
+ ctxt_size = sizeof(struct smb2_preauth_neg_context);
+
+ if (conn->cipher_type) {
+ /* Round to 8 byte boundary */
+ ctxt_size = round_up(ctxt_size, 8);
+ ksmbd_debug(SMB,
+ "assemble SMB2_ENCRYPTION_CAPABILITIES context\n");
+ build_encrypt_ctxt((struct smb2_encryption_neg_context *)
+ (pneg_ctxt + ctxt_size),
+ conn->cipher_type);
+ neg_ctxt_cnt++;
+ ctxt_size += sizeof(struct smb2_encryption_neg_context) + 2;
+ }
+
+ /* compression context not yet supported */
+ WARN_ON(conn->compress_algorithm != SMB3_COMPRESS_NONE);
+
+ if (conn->posix_ext_supported) {
+ ctxt_size = round_up(ctxt_size, 8);
+ ksmbd_debug(SMB,
+ "assemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
+ build_posix_ctxt((struct smb2_posix_neg_context *)
+ (pneg_ctxt + ctxt_size));
+ neg_ctxt_cnt++;
+ ctxt_size += sizeof(struct smb2_posix_neg_context);
+ }
+
+ if (conn->signing_negotiated) {
+ ctxt_size = round_up(ctxt_size, 8);
+ ksmbd_debug(SMB,
+ "assemble SMB2_SIGNING_CAPABILITIES context\n");
+ build_sign_cap_ctxt((struct smb2_signing_capabilities *)
+ (pneg_ctxt + ctxt_size),
+ conn->signing_algorithm);
+ neg_ctxt_cnt++;
+ ctxt_size += sizeof(struct smb2_signing_capabilities) + 2;
+ }
+
+ rsp->NegotiateContextCount = cpu_to_le16(neg_ctxt_cnt);
+ return ctxt_size + AUTH_GSS_PADDING;
+}
+
+static __le32 decode_preauth_ctxt(struct ksmbd_conn *conn,
+ struct smb2_preauth_neg_context *pneg_ctxt,
+ int ctxt_len)
+{
+ /*
+ * sizeof(smb2_preauth_neg_context) assumes SMB311_SALT_SIZE Salt,
+ * which may not be present. Only check for used HashAlgorithms[1].
+ */
+ if (ctxt_len <
+ sizeof(struct smb2_neg_context) + MIN_PREAUTH_CTXT_DATA_LEN)
+ return STATUS_INVALID_PARAMETER;
+
+ if (pneg_ctxt->HashAlgorithms != SMB2_PREAUTH_INTEGRITY_SHA512)
+ return STATUS_NO_PREAUTH_INTEGRITY_HASH_OVERLAP;
+
+ conn->preauth_info->Preauth_HashId = SMB2_PREAUTH_INTEGRITY_SHA512;
+ return STATUS_SUCCESS;
+}
+
+static void decode_encrypt_ctxt(struct ksmbd_conn *conn,
+ struct smb2_encryption_neg_context *pneg_ctxt,
+ int ctxt_len)
+{
+ int cph_cnt;
+ int i, cphs_size;
+
+ if (sizeof(struct smb2_encryption_neg_context) > ctxt_len) {
+ pr_err("Invalid SMB2_ENCRYPTION_CAPABILITIES context size\n");
+ return;
+ }
+
+ conn->cipher_type = 0;
+
+ cph_cnt = le16_to_cpu(pneg_ctxt->CipherCount);
+ cphs_size = cph_cnt * sizeof(__le16);
+
+ if (sizeof(struct smb2_encryption_neg_context) + cphs_size >
+ ctxt_len) {
+ pr_err("Invalid cipher count(%d)\n", cph_cnt);
+ return;
+ }
+
+ if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION_OFF)
+ return;
+
+ for (i = 0; i < cph_cnt; i++) {
+ if (pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_GCM ||
+ pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES128_CCM ||
+ pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_CCM ||
+ pneg_ctxt->Ciphers[i] == SMB2_ENCRYPTION_AES256_GCM) {
+ ksmbd_debug(SMB, "Cipher ID = 0x%x\n",
+ pneg_ctxt->Ciphers[i]);
+ conn->cipher_type = pneg_ctxt->Ciphers[i];
+ break;
+ }
+ }
+}
+
+/**
+ * smb3_encryption_negotiated() - checks if server and client agreed on enabling encryption
+ * @conn: smb connection
+ *
+ * Return: true if connection should be encrypted, else false
+ */
+bool smb3_encryption_negotiated(struct ksmbd_conn *conn)
+{
+ if (!conn->ops->generate_encryptionkey)
+ return false;
+
+ /*
+ * SMB 3.0 and 3.0.2 dialects use the SMB2_GLOBAL_CAP_ENCRYPTION flag.
+ * SMB 3.1.1 uses the cipher_type field.
+ */
+ return (conn->vals->capabilities & SMB2_GLOBAL_CAP_ENCRYPTION) ||
+ conn->cipher_type;
+}
+
+static void decode_compress_ctxt(struct ksmbd_conn *conn,
+ struct smb2_compression_capabilities_context *pneg_ctxt)
+{
+ conn->compress_algorithm = SMB3_COMPRESS_NONE;
+}
+
+static void decode_sign_cap_ctxt(struct ksmbd_conn *conn,
+ struct smb2_signing_capabilities *pneg_ctxt,
+ int ctxt_len)
+{
+ int sign_algo_cnt;
+ int i, sign_alos_size;
+
+ if (sizeof(struct smb2_signing_capabilities) > ctxt_len) {
+ pr_err("Invalid SMB2_SIGNING_CAPABILITIES context length\n");
+ return;
+ }
+
+ conn->signing_negotiated = false;
+ sign_algo_cnt = le16_to_cpu(pneg_ctxt->SigningAlgorithmCount);
+ sign_alos_size = sign_algo_cnt * sizeof(__le16);
+
+ if (sizeof(struct smb2_signing_capabilities) + sign_alos_size >
+ ctxt_len) {
+ pr_err("Invalid signing algorithm count(%d)\n", sign_algo_cnt);
+ return;
+ }
+
+ for (i = 0; i < sign_algo_cnt; i++) {
+ if (pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_HMAC_SHA256_LE ||
+ pneg_ctxt->SigningAlgorithms[i] == SIGNING_ALG_AES_CMAC_LE) {
+ ksmbd_debug(SMB, "Signing Algorithm ID = 0x%x\n",
+ pneg_ctxt->SigningAlgorithms[i]);
+ conn->signing_negotiated = true;
+ conn->signing_algorithm =
+ pneg_ctxt->SigningAlgorithms[i];
+ break;
+ }
+ }
+}
+
+static __le32 deassemble_neg_contexts(struct ksmbd_conn *conn,
+ struct smb2_negotiate_req *req,
+ unsigned int len_of_smb)
+{
+ /* +4 is to account for the RFC1001 len field */
+ struct smb2_neg_context *pctx = (struct smb2_neg_context *)req;
+ int i = 0, len_of_ctxts;
+ unsigned int offset = le32_to_cpu(req->NegotiateContextOffset);
+ unsigned int neg_ctxt_cnt = le16_to_cpu(req->NegotiateContextCount);
+ __le32 status = STATUS_INVALID_PARAMETER;
+
+ ksmbd_debug(SMB, "decoding %d negotiate contexts\n", neg_ctxt_cnt);
+ if (len_of_smb <= offset) {
+ ksmbd_debug(SMB, "Invalid response: negotiate context offset\n");
+ return status;
+ }
+
+ len_of_ctxts = len_of_smb - offset;
+
+ while (i++ < neg_ctxt_cnt) {
+ int clen, ctxt_len;
+
+ if (len_of_ctxts < (int)sizeof(struct smb2_neg_context))
+ break;
+
+ pctx = (struct smb2_neg_context *)((char *)pctx + offset);
+ clen = le16_to_cpu(pctx->DataLength);
+ ctxt_len = clen + sizeof(struct smb2_neg_context);
+
+ if (ctxt_len > len_of_ctxts)
+ break;
+
+ if (pctx->ContextType == SMB2_PREAUTH_INTEGRITY_CAPABILITIES) {
+ ksmbd_debug(SMB,
+ "deassemble SMB2_PREAUTH_INTEGRITY_CAPABILITIES context\n");
+ if (conn->preauth_info->Preauth_HashId)
+ break;
+
+ status = decode_preauth_ctxt(conn,
+ (struct smb2_preauth_neg_context *)pctx,
+ ctxt_len);
+ if (status != STATUS_SUCCESS)
+ break;
+ } else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES) {
+ ksmbd_debug(SMB,
+ "deassemble SMB2_ENCRYPTION_CAPABILITIES context\n");
+ if (conn->cipher_type)
+ break;
+
+ decode_encrypt_ctxt(conn,
+ (struct smb2_encryption_neg_context *)pctx,
+ ctxt_len);
+ } else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES) {
+ ksmbd_debug(SMB,
+ "deassemble SMB2_COMPRESSION_CAPABILITIES context\n");
+ if (conn->compress_algorithm)
+ break;
+
+ decode_compress_ctxt(conn,
+ (struct smb2_compression_capabilities_context *)pctx);
+ } else if (pctx->ContextType == SMB2_NETNAME_NEGOTIATE_CONTEXT_ID) {
+ ksmbd_debug(SMB,
+ "deassemble SMB2_NETNAME_NEGOTIATE_CONTEXT_ID context\n");
+ } else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE) {
+ ksmbd_debug(SMB,
+ "deassemble SMB2_POSIX_EXTENSIONS_AVAILABLE context\n");
+ conn->posix_ext_supported = true;
+ } else if (pctx->ContextType == SMB2_SIGNING_CAPABILITIES) {
+ ksmbd_debug(SMB,
+ "deassemble SMB2_SIGNING_CAPABILITIES context\n");
+
+ decode_sign_cap_ctxt(conn,
+ (struct smb2_signing_capabilities *)pctx,
+ ctxt_len);
+ }
+
+ /* offsets must be 8 byte aligned */
+ offset = (ctxt_len + 7) & ~0x7;
+ len_of_ctxts -= offset;
+ }
+ return status;
+}
+
+/**
+ * smb2_handle_negotiate() - handler for smb2 negotiate command
+ * @work: smb work containing smb request buffer
+ *
+ * Return: 0
+ */
+int smb2_handle_negotiate(struct ksmbd_work *work)
+{
+ struct ksmbd_conn *conn = work->conn;
+ struct smb2_negotiate_req *req = smb2_get_msg(work->request_buf);
+ struct smb2_negotiate_rsp *rsp = smb2_get_msg(work->response_buf);
+ int rc = 0;
+ unsigned int smb2_buf_len, smb2_neg_size, neg_ctxt_len = 0;
+ __le32 status;
+
+ ksmbd_debug(SMB, "Received negotiate request\n");
+ conn->need_neg = false;
+ if (ksmbd_conn_good(conn)) {
+ pr_err("conn->tcp_status is already in CifsGood State\n");
+ work->send_no_response = 1;
+ return rc;
+ }
+
+ smb2_buf_len = get_rfc1002_len(work->request_buf);
+ smb2_neg_size = offsetof(struct smb2_negotiate_req, Dialects);
+ if (smb2_neg_size > smb2_buf_len) {
+ rsp->hdr.Status = STATUS_INVALID_PARAMETER;
+ rc = -EINVAL;
+ goto err_out;
+ }
+
+ if (req->DialectCount == 0) {
+ pr_err("malformed packet\n");
+ rsp->hdr.Status = STATUS_INVALID_PARAMETER;
+ rc = -EINVAL;
+ goto err_out;
+ }
+
+ if (conn->dialect == SMB311_PROT_ID) {
+ unsigned int nego_ctxt_off = le32_to_cpu(req->NegotiateContextOffset);
+
+ if (smb2_buf_len < nego_ctxt_off) {
+ rsp->hdr.Status = STATUS_INVALID_PARAMETER;
+ rc = -EINVAL;
+ goto err_out;
+ }
+
+ if (smb2_neg_size > nego_ctxt_off) {
+ rsp->hdr.Status = STATUS_INVALID_PARAMETER;
+ rc = -EINVAL;
+ goto err_out;
+ }
+
+ if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
+ nego_ctxt_off) {
+ rsp->hdr.Status = STATUS_INVALID_PARAMETER;
+ rc = -EINVAL;
+ goto err_out;
+ }
+ } else {
+ if (smb2_neg_size + le16_to_cpu(req->DialectCount) * sizeof(__le16) >
+ smb2_buf_len) {
+ rsp->hdr.Status = STATUS_INVALID_PARAMETER;
+ rc = -EINVAL;
+ goto err_out;
+ }
+ }
+
+ conn->cli_cap = le32_to_cpu(req->Capabilities);
+ switch (conn->dialect) {
+ case SMB311_PROT_ID:
+ conn->preauth_info =
+ kzalloc(sizeof(struct preauth_integrity_info),
+ GFP_KERNEL);
+ if (!conn->preauth_info) {
+ rc = -ENOMEM;
+ rsp->hdr.Status = STATUS_INVALID_PARAMETER;
+ goto err_out;
+ }
+
+ status = deassemble_neg_contexts(conn, req,
+ get_rfc1002_len(work->request_buf));
+ if (status != STATUS_SUCCESS) {
+ pr_err("deassemble_neg_contexts error(0x%x)\n",
+ status);
+ rsp->hdr.Status = status;
+ rc = -EINVAL;
+ kfree(conn->preauth_info);
+ conn->preauth_info = NULL;
+ goto err_out;
+ }
+
+ rc = init_smb3_11_server(conn);
+ if (rc < 0) {
+ rsp->hdr.Status = STATUS_INVALID_PARAMETER;
+ kfree(conn->preauth_info);
+ conn->preauth_info = NULL;
+ goto err_out;
+ }
+
+ ksmbd_gen_preauth_integrity_hash(conn,
+ work->request_buf,
+ conn->preauth_info->Preauth_HashValue);
+ rsp->NegotiateContextOffset =
+ cpu_to_le32(OFFSET_OF_NEG_CONTEXT);
+ neg_ctxt_len = assemble_neg_contexts(conn, rsp);
+ break;
+ case SMB302_PROT_ID:
+ init_smb3_02_server(conn);
+ break;
+ case SMB30_PROT_ID:
+ init_smb3_0_server(conn);
+ break;
+ case SMB21_PROT_ID:
+ init_smb2_1_server(conn);
+ break;
+ case SMB2X_PROT_ID:
+ case BAD_PROT_ID:
+ default:
+ ksmbd_debug(SMB, "Server dialect :0x%x not supported\n",
+ conn->dialect);
+ rsp->hdr.Status = STATUS_NOT_SUPPORTED;
+ rc = -EINVAL;
+ goto err_out;
+ }
+ rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
+
+ /* For stats */
+ conn->connection_type = conn->dialect;
+
+ rsp->MaxTransactSize = cpu_to_le32(conn->vals->max_trans_size);
+ rsp->MaxReadSize = cpu_to_le32(conn->vals->max_read_size);
+ rsp->MaxWriteSize = cpu_to_le32(conn->vals->max_write_size);
+
+ memcpy(conn->ClientGUID, req->ClientGUID,
+ SMB2_CLIENT_GUID_SIZE);
+ conn->cli_sec_mode = le16_to_cpu(req->SecurityMode);
+
+ rsp->StructureSize = cpu_to_le16(65);
+ rsp->DialectRevision = cpu_to_le16(conn->dialect);
+ /* Not setting conn guid rsp->ServerGUID, as it
+ * not used by client for identifying server
+ */
+ memset(rsp->ServerGUID, 0, SMB2_CLIENT_GUID_SIZE);
+
+ rsp->SystemTime = cpu_to_le64(ksmbd_systime());
+ rsp->ServerStartTime = 0;
+ ksmbd_debug(SMB, "negotiate context offset %d, count %d\n",
+ le32_to_cpu(rsp->NegotiateContextOffset),
+ le16_to_cpu(rsp->NegotiateContextCount));
+
+ rsp->SecurityBufferOffset = cpu_to_le16(128);
+ rsp->SecurityBufferLength = cpu_to_le16(AUTH_GSS_LENGTH);
+ ksmbd_copy_gss_neg_header((char *)(&rsp->hdr) +
+ le16_to_cpu(rsp->SecurityBufferOffset));
+
+ rsp->SecurityMode = SMB2_NEGOTIATE_SIGNING_ENABLED_LE;
+ conn->use_spnego = true;
+
+ if ((server_conf.signing == KSMBD_CONFIG_OPT_AUTO ||
+ server_conf.signing == KSMBD_CONFIG_OPT_DISABLED) &&
+ req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED_LE)
+ conn->sign = true;
+ else if (server_conf.signing == KSMBD_CONFIG_OPT_MANDATORY) {
+ server_conf.enforced_signing = true;
+ rsp->SecurityMode |= SMB2_NEGOTIATE_SIGNING_REQUIRED_LE;
+ conn->sign = true;
+ }
+
+ conn->srv_sec_mode = le16_to_cpu(rsp->SecurityMode);
+ ksmbd_conn_set_need_negotiate(conn);
+
+err_out:
+ if (rc)
+ rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
+
+ if (!rc)
+ rc = ksmbd_iov_pin_rsp(work, rsp,
+ sizeof(struct smb2_negotiate_rsp) +
+ AUTH_GSS_LENGTH + neg_ctxt_len);
+ if (rc < 0)
+ smb2_set_err_rsp(work);
+ return rc;
+}
+
+static int alloc_preauth_hash(struct ksmbd_session *sess,
+ struct ksmbd_conn *conn)
+{
+ if (sess->Preauth_HashValue)
+ return 0;
+
+ sess->Preauth_HashValue = kmemdup(conn->preauth_info->Preauth_HashValue,
+ PREAUTH_HASHVALUE_SIZE, GFP_KERNEL);
+ if (!sess->Preauth_HashValue)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static int generate_preauth_hash(struct ksmbd_work *work)
+{
+ struct ksmbd_conn *conn = work->conn;
+ struct ksmbd_session *sess = work->sess;
+ u8 *preauth_hash;
+
+ if (conn->dialect != SMB311_PROT_ID)
+ return 0;
+
+ if (conn->binding) {
+ struct preauth_session *preauth_sess;
+
+ preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
+ if (!preauth_sess) {
+ preauth_sess = ksmbd_preauth_session_alloc(conn, sess->id);
+ if (!preauth_sess)
+ return -ENOMEM;
+ }
+
+ preauth_hash = preauth_sess->Preauth_HashValue;
+ } else {
+ if (!sess->Preauth_HashValue)
+ if (alloc_preauth_hash(sess, conn))
+ return -ENOMEM;
+ preauth_hash = sess->Preauth_HashValue;
+ }
+
+ ksmbd_gen_preauth_integrity_hash(conn, work->request_buf, preauth_hash);
+ return 0;
+}
+
+static int decode_negotiation_token(struct ksmbd_conn *conn,
+ struct negotiate_message *negblob,
+ size_t sz)
+{
+ if (!conn->use_spnego)
+ return -EINVAL;
+
+ if (ksmbd_decode_negTokenInit((char *)negblob, sz, conn)) {
+ if (ksmbd_decode_negTokenTarg((char *)negblob, sz, conn)) {
+ conn->auth_mechs |= KSMBD_AUTH_NTLMSSP;
+ conn->preferred_auth_mech = KSMBD_AUTH_NTLMSSP;
+ conn->use_spnego = false;
+ }
+ }
+ return 0;
+}
+
+static int ntlm_negotiate(struct ksmbd_work *work,
+ struct negotiate_message *negblob,
+ size_t negblob_len, struct smb2_sess_setup_rsp *rsp)
+{
+ struct challenge_message *chgblob;
+ unsigned char *spnego_blob = NULL;
+ u16 spnego_blob_len;
+ char *neg_blob;
+ int sz, rc;
+
+ ksmbd_debug(SMB, "negotiate phase\n");
+ rc = ksmbd_decode_ntlmssp_neg_blob(negblob, negblob_len, work->conn);
+ if (rc)
+ return rc;
+
+ sz = le16_to_cpu(rsp->SecurityBufferOffset);
+ chgblob =
+ (struct challenge_message *)((char *)&rsp->hdr.ProtocolId + sz);
+ memset(chgblob, 0, sizeof(struct challenge_message));
+
+ if (!work->conn->use_spnego) {
+ sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
+ if (sz < 0)
+ return -ENOMEM;
+
+ rsp->SecurityBufferLength = cpu_to_le16(sz);
+ return 0;
+ }
+
+ sz = sizeof(struct challenge_message);
+ sz += (strlen(ksmbd_netbios_name()) * 2 + 1 + 4) * 6;
+
+ neg_blob = kzalloc(sz, GFP_KERNEL);
+ if (!neg_blob)
+ return -ENOMEM;
+
+ chgblob = (struct challenge_message *)neg_blob;
+ sz = ksmbd_build_ntlmssp_challenge_blob(chgblob, work->conn);
+ if (sz < 0) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ rc = build_spnego_ntlmssp_neg_blob(&spnego_blob, &spnego_blob_len,
+ neg_blob, sz);
+ if (rc) {
+ rc = -ENOMEM;
+ goto out;
+ }
+
+ sz = le16_to_cpu(rsp->SecurityBufferOffset);
+ memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
+ rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
+
+out:
+ kfree(spnego_blob);
+ kfree(neg_blob);
+ return rc;
+}
+
+static struct authenticate_message *user_authblob(struct ksmbd_conn *conn,
+ struct smb2_sess_setup_req *req)
+{
+ int sz;
+
+ if (conn->use_spnego && conn->mechToken)
+ return (struct authenticate_message *)conn->mechToken;
+
+ sz = le16_to_cpu(req->SecurityBufferOffset);
+ return (struct authenticate_message *)((char *)&req->hdr.ProtocolId
+ + sz);
+}
+
+static struct ksmbd_user *session_user(struct ksmbd_conn *conn,
+ struct smb2_sess_setup_req *req)
+{
+ struct authenticate_message *authblob;
+ struct ksmbd_user *user;
+ char *name;
+ unsigned int name_off, name_len, secbuf_len;
+
+ if (conn->use_spnego && conn->mechToken)
+ secbuf_len = conn->mechTokenLen;
+ else
+ secbuf_len = le16_to_cpu(req->SecurityBufferLength);
+ if (secbuf_len < sizeof(struct authenticate_message)) {
+ ksmbd_debug(SMB, "blob len %d too small\n", secbuf_len);
+ return NULL;
+ }
+ authblob = user_authblob(conn, req);
+ name_off = le32_to_cpu(authblob->UserName.BufferOffset);
+ name_len = le16_to_cpu(authblob->UserName.Length);
+
+ if (secbuf_len < (u64)name_off + name_len)
+ return NULL;
+
+ name = smb_strndup_from_utf16((const char *)authblob + name_off,
+ name_len,
+ true,
+ conn->local_nls);
+ if (IS_ERR(name)) {
+ pr_err("cannot allocate memory\n");
+ return NULL;
+ }
+
+ ksmbd_debug(SMB, "session setup request for user %s\n", name);
+ user = ksmbd_login_user(name);
+ kfree(name);
+ return user;
+}
+
+static int ntlm_authenticate(struct ksmbd_work *work,
+ struct smb2_sess_setup_req *req,
+ struct smb2_sess_setup_rsp *rsp)
+{
+ struct ksmbd_conn *conn = work->conn;
+ struct ksmbd_session *sess = work->sess;
+ struct channel *chann = NULL;
+ struct ksmbd_user *user;
+ u64 prev_id;
+ int sz, rc;
+
+ ksmbd_debug(SMB, "authenticate phase\n");
+ if (conn->use_spnego) {
+ unsigned char *spnego_blob;
+ u16 spnego_blob_len;
+
+ rc = build_spnego_ntlmssp_auth_blob(&spnego_blob,
+ &spnego_blob_len,
+ 0);
+ if (rc)
+ return -ENOMEM;
+
+ sz = le16_to_cpu(rsp->SecurityBufferOffset);
+ memcpy((char *)&rsp->hdr.ProtocolId + sz, spnego_blob, spnego_blob_len);
+ rsp->SecurityBufferLength = cpu_to_le16(spnego_blob_len);
+ kfree(spnego_blob);
+ }
+
+ user = session_user(conn, req);
+ if (!user) {
+ ksmbd_debug(SMB, "Unknown user name or an error\n");
+ return -EPERM;
+ }
+
+ /* Check for previous session */
+ prev_id = le64_to_cpu(req->PreviousSessionId);
+ if (prev_id && prev_id != sess->id)
+ destroy_previous_session(conn, user, prev_id);
+
+ if (sess->state == SMB2_SESSION_VALID) {
+ /*
+ * Reuse session if anonymous try to connect
+ * on reauthetication.
+ */
+ if (conn->binding == false && ksmbd_anonymous_user(user)) {
+ ksmbd_free_user(user);
+ return 0;
+ }
+
+ if (!ksmbd_compare_user(sess->user, user)) {
+ ksmbd_free_user(user);
+ return -EPERM;
+ }
+ ksmbd_free_user(user);
+ } else {
+ sess->user = user;
+ }
+
+ if (conn->binding == false && user_guest(sess->user)) {
+ rsp->SessionFlags = SMB2_SESSION_FLAG_IS_GUEST_LE;
+ } else {
+ struct authenticate_message *authblob;
+
+ authblob = user_authblob(conn, req);
+ if (conn->use_spnego && conn->mechToken)
+ sz = conn->mechTokenLen;
+ else
+ sz = le16_to_cpu(req->SecurityBufferLength);
+ rc = ksmbd_decode_ntlmssp_auth_blob(authblob, sz, conn, sess);
+ if (rc) {
+ set_user_flag(sess->user, KSMBD_USER_FLAG_BAD_PASSWORD);
+ ksmbd_debug(SMB, "authentication failed\n");
+ return -EPERM;
+ }
+ }
+
+ /*
+ * If session state is SMB2_SESSION_VALID, We can assume
+ * that it is reauthentication. And the user/password
+ * has been verified, so return it here.
+ */
+ if (sess->state == SMB2_SESSION_VALID) {
+ if (conn->binding)
+ goto binding_session;
+ return 0;
+ }
+
+ if ((rsp->SessionFlags != SMB2_SESSION_FLAG_IS_GUEST_LE &&
+ (conn->sign || server_conf.enforced_signing)) ||
+ (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
+ sess->sign = true;
+
+ if (smb3_encryption_negotiated(conn) &&
+ !(req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
+ rc = conn->ops->generate_encryptionkey(conn, sess);
+ if (rc) {
+ ksmbd_debug(SMB,
+ "SMB3 encryption key generation failed\n");
+ return -EINVAL;
+ }
+ sess->enc = true;
+ if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION)
+ rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
+ /*
+ * signing is disable if encryption is enable
+ * on this session
+ */
+ sess->sign = false;
+ }
+
+binding_session:
+ if (conn->dialect >= SMB30_PROT_ID) {
+ chann = lookup_chann_list(sess, conn);
+ if (!chann) {
+ chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
+ if (!chann)
+ return -ENOMEM;
+
+ chann->conn = conn;
+ xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL);
+ }
+ }
+
+ if (conn->ops->generate_signingkey) {
+ rc = conn->ops->generate_signingkey(sess, conn);
+ if (rc) {
+ ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
+ return -EINVAL;
+ }
+ }
+
+ if (!ksmbd_conn_lookup_dialect(conn)) {
+ pr_err("fail to verify the dialect\n");
+ return -ENOENT;
+ }
+ return 0;
+}
+
+#ifdef CONFIG_SMB_SERVER_KERBEROS5
+static int krb5_authenticate(struct ksmbd_work *work,
+ struct smb2_sess_setup_req *req,
+ struct smb2_sess_setup_rsp *rsp)
+{
+ struct ksmbd_conn *conn = work->conn;
+ struct ksmbd_session *sess = work->sess;
+ char *in_blob, *out_blob;
+ struct channel *chann = NULL;
+ u64 prev_sess_id;
+ int in_len, out_len;
+ int retval;
+
+ in_blob = (char *)&req->hdr.ProtocolId +
+ le16_to_cpu(req->SecurityBufferOffset);
+ in_len = le16_to_cpu(req->SecurityBufferLength);
+ out_blob = (char *)&rsp->hdr.ProtocolId +
+ le16_to_cpu(rsp->SecurityBufferOffset);
+ out_len = work->response_sz -
+ (le16_to_cpu(rsp->SecurityBufferOffset) + 4);
+
+ /* Check previous session */
+ prev_sess_id = le64_to_cpu(req->PreviousSessionId);
+ if (prev_sess_id && prev_sess_id != sess->id)
+ destroy_previous_session(conn, sess->user, prev_sess_id);
+
+ if (sess->state == SMB2_SESSION_VALID)
+ ksmbd_free_user(sess->user);
+
+ retval = ksmbd_krb5_authenticate(sess, in_blob, in_len,
+ out_blob, &out_len);
+ if (retval) {
+ ksmbd_debug(SMB, "krb5 authentication failed\n");
+ return -EINVAL;
+ }
+ rsp->SecurityBufferLength = cpu_to_le16(out_len);
+
+ if ((conn->sign || server_conf.enforced_signing) ||
+ (req->SecurityMode & SMB2_NEGOTIATE_SIGNING_REQUIRED))
+ sess->sign = true;
+
+ if (smb3_encryption_negotiated(conn)) {
+ retval = conn->ops->generate_encryptionkey(conn, sess);
+ if (retval) {
+ ksmbd_debug(SMB,
+ "SMB3 encryption key generation failed\n");
+ return -EINVAL;
+ }
+ sess->enc = true;
+ if (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB2_ENCRYPTION)
+ rsp->SessionFlags = SMB2_SESSION_FLAG_ENCRYPT_DATA_LE;
+ sess->sign = false;
+ }
+
+ if (conn->dialect >= SMB30_PROT_ID) {
+ chann = lookup_chann_list(sess, conn);
+ if (!chann) {
+ chann = kmalloc(sizeof(struct channel), GFP_KERNEL);
+ if (!chann)
+ return -ENOMEM;
+
+ chann->conn = conn;
+ xa_store(&sess->ksmbd_chann_list, (long)conn, chann, GFP_KERNEL);
+ }
+ }
+
+ if (conn->ops->generate_signingkey) {
+ retval = conn->ops->generate_signingkey(sess, conn);
+ if (retval) {
+ ksmbd_debug(SMB, "SMB3 signing key generation failed\n");
+ return -EINVAL;
+ }
+ }
+
+ if (!ksmbd_conn_lookup_dialect(conn)) {
+ pr_err("fail to verify the dialect\n");
+ return -ENOENT;
+ }
+ return 0;
+}
+#else
+static int krb5_authenticate(struct ksmbd_work *work,
+ struct smb2_sess_setup_req *req,
+ struct smb2_sess_setup_rsp *rsp)
+{
+ return -EOPNOTSUPP;
+}
+#endif
+
+int smb2_sess_setup(struct ksmbd_work *work)
+{
+ struct ksmbd_conn *conn = work->conn;
+ struct smb2_sess_setup_req *req;
+ struct smb2_sess_setup_rsp *rsp;
+ struct ksmbd_session *sess;
+ struct negotiate_message *negblob;
+ unsigned int negblob_len, negblob_off;
+ int rc = 0;
+
+ ksmbd_debug(SMB, "Received request for session setup\n");
+
+ WORK_BUFFERS(work, req, rsp);
+
+ rsp->StructureSize = cpu_to_le16(9);
+ rsp->SessionFlags = 0;
+ rsp->SecurityBufferOffset = cpu_to_le16(72);
+ rsp->SecurityBufferLength = 0;
+
+ ksmbd_conn_lock(conn);
+ if (!req->hdr.SessionId) {
+ sess = ksmbd_smb2_session_create();
+ if (!sess) {
+ rc = -ENOMEM;
+ goto out_err;
+ }
+ rsp->hdr.SessionId = cpu_to_le64(sess->id);
+ rc = ksmbd_session_register(conn, sess);
+ if (rc)
+ goto out_err;
+ } else if (conn->dialect >= SMB30_PROT_ID &&
+ (server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
+ req->Flags & SMB2_SESSION_REQ_FLAG_BINDING) {
+ u64 sess_id = le64_to_cpu(req->hdr.SessionId);
+
+ sess = ksmbd_session_lookup_slowpath(sess_id);
+ if (!sess) {
+ rc = -ENOENT;
+ goto out_err;
+ }
+
+ if (conn->dialect != sess->dialect) {
+ rc = -EINVAL;
+ goto out_err;
+ }
+
+ if (!(req->hdr.Flags & SMB2_FLAGS_SIGNED)) {
+ rc = -EINVAL;
+ goto out_err;
+ }
+
+ if (strncmp(conn->ClientGUID, sess->ClientGUID,
+ SMB2_CLIENT_GUID_SIZE)) {
+ rc = -ENOENT;
+ goto out_err;
+ }
+
+ if (sess->state == SMB2_SESSION_IN_PROGRESS) {
+ rc = -EACCES;
+ goto out_err;
+ }
+
+ if (sess->state == SMB2_SESSION_EXPIRED) {
+ rc = -EFAULT;
+ goto out_err;
+ }
+
+ if (ksmbd_conn_need_reconnect(conn)) {
+ rc = -EFAULT;
+ sess = NULL;
+ goto out_err;
+ }
+
+ if (ksmbd_session_lookup(conn, sess_id)) {
+ rc = -EACCES;
+ goto out_err;
+ }
+
+ if (user_guest(sess->user)) {
+ rc = -EOPNOTSUPP;
+ goto out_err;
+ }
+
+ conn->binding = true;
+ } else if ((conn->dialect < SMB30_PROT_ID ||
+ server_conf.flags & KSMBD_GLOBAL_FLAG_SMB3_MULTICHANNEL) &&
+ (req->Flags & SMB2_SESSION_REQ_FLAG_BINDING)) {
+ sess = NULL;
+ rc = -EACCES;
+ goto out_err;
+ } else {
+ sess = ksmbd_session_lookup(conn,
+ le64_to_cpu(req->hdr.SessionId));
+ if (!sess) {
+ rc = -ENOENT;
+ goto out_err;
+ }
+
+ if (sess->state == SMB2_SESSION_EXPIRED) {
+ rc = -EFAULT;
+ goto out_err;
+ }
+
+ if (ksmbd_conn_need_reconnect(conn)) {
+ rc = -EFAULT;
+ sess = NULL;
+ goto out_err;
+ }
+ }
+ work->sess = sess;
+
+ negblob_off = le16_to_cpu(req->SecurityBufferOffset);
+ negblob_len = le16_to_cpu(req->SecurityBufferLength);
+ if (negblob_off < offsetof(struct smb2_sess_setup_req, Buffer)) {
+ rc = -EINVAL;
+ goto out_err;
+ }
+
+ negblob = (struct negotiate_message *)((char *)&req->hdr.ProtocolId +
+ negblob_off);
+
+ if (decode_negotiation_token(conn, negblob, negblob_len) == 0) {
+ if (conn->mechToken) {
+ negblob = (struct negotiate_message *)conn->mechToken;
+ negblob_len = conn->mechTokenLen;
+ }
+ }
+
+ if (negblob_len < offsetof(struct negotiate_message, NegotiateFlags)) {
+ rc = -EINVAL;
+ goto out_err;
+ }
+
+ if (server_conf.auth_mechs & conn->auth_mechs) {
+ rc = generate_preauth_hash(work);
+ if (rc)
+ goto out_err;
+
+ if (conn->preferred_auth_mech &
+ (KSMBD_AUTH_KRB5 | KSMBD_AUTH_MSKRB5)) {
+ rc = krb5_authenticate(work, req, rsp);
+ if (rc) {
+ rc = -EINVAL;
+ goto out_err;
+ }
+
+ if (!ksmbd_conn_need_reconnect(conn)) {
+ ksmbd_conn_set_good(conn);
+ sess->state = SMB2_SESSION_VALID;
+ }
+ kfree(sess->Preauth_HashValue);
+ sess->Preauth_HashValue = NULL;
+ } else if (conn->preferred_auth_mech == KSMBD_AUTH_NTLMSSP) {
+ if (negblob->MessageType == NtLmNegotiate) {
+ rc = ntlm_negotiate(work, negblob, negblob_len, rsp);
+ if (rc)
+ goto out_err;
+ rsp->hdr.Status =
+ STATUS_MORE_PROCESSING_REQUIRED;
+ } else if (negblob->MessageType == NtLmAuthenticate) {
+ rc = ntlm_authenticate(work, req, rsp);
+ if (rc)
+ goto out_err;
+
+ if (!ksmbd_conn_need_reconnect(conn)) {
+ ksmbd_conn_set_good(conn);
+ sess->state = SMB2_SESSION_VALID;
+ }
+ if (conn->binding) {
+ struct preauth_session *preauth_sess;
+
+ preauth_sess =
+ ksmbd_preauth_session_lookup(conn, sess->id);
+ if (preauth_sess) {
+ list_del(&preauth_sess->preauth_entry);
+ kfree(preauth_sess);
+ }
+ }
+ kfree(sess->Preauth_HashValue);
+ sess->Preauth_HashValue = NULL;
+ } else {
+ pr_info_ratelimited("Unknown NTLMSSP message type : 0x%x\n",
+ le32_to_cpu(negblob->MessageType));
+ rc = -EINVAL;
+ }
+ } else {
+ /* TODO: need one more negotiation */
+ pr_err("Not support the preferred authentication\n");
+ rc = -EINVAL;
+ }
+ } else {
+ pr_err("Not support authentication\n");
+ rc = -EINVAL;
+ }
+
+out_err:
+ if (rc == -EINVAL)
+ rsp->hdr.Status = STATUS_INVALID_PARAMETER;
+ else if (rc == -ENOENT)
+ rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
+ else if (rc == -EACCES)
+ rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
+ else if (rc == -EFAULT)
+ rsp->hdr.Status = STATUS_NETWORK_SESSION_EXPIRED;
+ else if (rc == -ENOMEM)
+ rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
+ else if (rc == -EOPNOTSUPP)
+ rsp->hdr.Status = STATUS_NOT_SUPPORTED;
+ else if (rc)
+ rsp->hdr.Status = STATUS_LOGON_FAILURE;
+
+ if (conn->use_spnego && conn->mechToken) {
+ kfree(conn->mechToken);
+ conn->mechToken = NULL;
+ }
+
+ if (rc < 0) {
+ /*
+ * SecurityBufferOffset should be set to zero
+ * in session setup error response.
+ */
+ rsp->SecurityBufferOffset = 0;
+
+ if (sess) {
+ bool try_delay = false;
+
+ /*
+ * To avoid dictionary attacks (repeated session setups rapidly sent) to
+ * connect to server, ksmbd make a delay of a 5 seconds on session setup
+ * failure to make it harder to send enough random connection requests
+ * to break into a server.
+ */
+ if (sess->user && sess->user->flags & KSMBD_USER_FLAG_DELAY_SESSION)
+ try_delay = true;
+
+ sess->last_active = jiffies;
+ sess->state = SMB2_SESSION_EXPIRED;
+ if (try_delay) {
+ ksmbd_conn_set_need_reconnect(conn);
+ ssleep(5);
+ ksmbd_conn_set_need_negotiate(conn);
+ }
+ }
+ smb2_set_err_rsp(work);
+ } else {
+ unsigned int iov_len;
+
+ if (rsp->SecurityBufferLength)
+ iov_len = offsetof(struct smb2_sess_setup_rsp, Buffer) +
+ le16_to_cpu(rsp->SecurityBufferLength);
+ else
+ iov_len = sizeof(struct smb2_sess_setup_rsp);
+ rc = ksmbd_iov_pin_rsp(work, rsp, iov_len);
+ if (rc)
+ rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
+ }
+
+ ksmbd_conn_unlock(conn);
+ return rc;
+}
+
+/**
+ * smb2_tree_connect() - handler for smb2 tree connect command
+ * @work: smb work containing smb request buffer
+ *
+ * Return: 0 on success, otherwise error
+ */
+int smb2_tree_connect(struct ksmbd_work *work)
+{
+ struct ksmbd_conn *conn = work->conn;
+ struct smb2_tree_connect_req *req;
+ struct smb2_tree_connect_rsp *rsp;
+ struct ksmbd_session *sess = work->sess;
+ char *treename = NULL, *name = NULL;
+ struct ksmbd_tree_conn_status status;
+ struct ksmbd_share_config *share;
+ int rc = -EINVAL;
+
+ WORK_BUFFERS(work, req, rsp);
+
+ treename = smb_strndup_from_utf16(req->Buffer,
+ le16_to_cpu(req->PathLength), true,
+ conn->local_nls);
+ if (IS_ERR(treename)) {
+ pr_err("treename is NULL\n");
+ status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
+ goto out_err1;
+ }
+
+ name = ksmbd_extract_sharename(conn->um, treename);
+ if (IS_ERR(name)) {
+ status.ret = KSMBD_TREE_CONN_STATUS_ERROR;
+ goto out_err1;
+ }
+
+ ksmbd_debug(SMB, "tree connect request for tree %s treename %s\n",
+ name, treename);
+
+ status = ksmbd_tree_conn_connect(conn, sess, name);
+ if (status.ret == KSMBD_TREE_CONN_STATUS_OK)
+ rsp->hdr.Id.SyncId.TreeId = cpu_to_le32(status.tree_conn->id);
+ else
+ goto out_err1;
+
+ share = status.tree_conn->share_conf;
+ if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
+ ksmbd_debug(SMB, "IPC share path request\n");
+ rsp->ShareType = SMB2_SHARE_TYPE_PIPE;
+ rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
+ FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE |
+ FILE_DELETE_LE | FILE_READ_CONTROL_LE |
+ FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
+ FILE_SYNCHRONIZE_LE;
+ } else {
+ rsp->ShareType = SMB2_SHARE_TYPE_DISK;
+ rsp->MaximalAccess = FILE_READ_DATA_LE | FILE_READ_EA_LE |
+ FILE_EXECUTE_LE | FILE_READ_ATTRIBUTES_LE;
+ if (test_tree_conn_flag(status.tree_conn,
+ KSMBD_TREE_CONN_FLAG_WRITABLE)) {
+ rsp->MaximalAccess |= FILE_WRITE_DATA_LE |
+ FILE_APPEND_DATA_LE | FILE_WRITE_EA_LE |
+ FILE_DELETE_LE | FILE_WRITE_ATTRIBUTES_LE |
+ FILE_DELETE_CHILD_LE | FILE_READ_CONTROL_LE |
+ FILE_WRITE_DAC_LE | FILE_WRITE_OWNER_LE |
+ FILE_SYNCHRONIZE_LE;
+ }
+ }
+
+ status.tree_conn->maximal_access = le32_to_cpu(rsp->MaximalAccess);
+ if (conn->posix_ext_supported)
+ status.tree_conn->posix_extensions = true;
+
+ write_lock(&sess->tree_conns_lock);
+ status.tree_conn->t_state = TREE_CONNECTED;
+ write_unlock(&sess->tree_conns_lock);
+ rsp->StructureSize = cpu_to_le16(16);
+out_err1:
+ rsp->Capabilities = 0;
+ rsp->Reserved = 0;
+ /* default manual caching */
+ rsp->ShareFlags = SMB2_SHAREFLAG_MANUAL_CACHING;
+
+ rc = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_tree_connect_rsp));
+ if (rc)
+ status.ret = KSMBD_TREE_CONN_STATUS_NOMEM;
+
+ if (!IS_ERR(treename))
+ kfree(treename);
+ if (!IS_ERR(name))
+ kfree(name);
+
+ switch (status.ret) {
+ case KSMBD_TREE_CONN_STATUS_OK:
+ rsp->hdr.Status = STATUS_SUCCESS;
+ rc = 0;
+ break;
+ case -ESTALE:
+ case -ENOENT:
+ case KSMBD_TREE_CONN_STATUS_NO_SHARE:
+ rsp->hdr.Status = STATUS_BAD_NETWORK_NAME;
+ break;
+ case -ENOMEM:
+ case KSMBD_TREE_CONN_STATUS_NOMEM:
+ rsp->hdr.Status = STATUS_NO_MEMORY;
+ break;
+ case KSMBD_TREE_CONN_STATUS_ERROR:
+ case KSMBD_TREE_CONN_STATUS_TOO_MANY_CONNS:
+ case KSMBD_TREE_CONN_STATUS_TOO_MANY_SESSIONS:
+ rsp->hdr.Status = STATUS_ACCESS_DENIED;
+ break;
+ case -EINVAL:
+ rsp->hdr.Status = STATUS_INVALID_PARAMETER;
+ break;
+ default:
+ rsp->hdr.Status = STATUS_ACCESS_DENIED;
+ }
+
+ if (status.ret != KSMBD_TREE_CONN_STATUS_OK)
+ smb2_set_err_rsp(work);
+
+ return rc;
+}
+
+/**
+ * smb2_create_open_flags() - convert smb open flags to unix open flags
+ * @file_present: is file already present
+ * @access: file access flags
+ * @disposition: file disposition flags
+ * @may_flags: set with MAY_ flags
+ *
+ * Return: file open flags
+ */
+static int smb2_create_open_flags(bool file_present, __le32 access,
+ __le32 disposition,
+ int *may_flags)
+{
+ int oflags = O_NONBLOCK | O_LARGEFILE;
+
+ if (access & FILE_READ_DESIRED_ACCESS_LE &&
+ access & FILE_WRITE_DESIRE_ACCESS_LE) {
+ oflags |= O_RDWR;
+ *may_flags = MAY_OPEN | MAY_READ | MAY_WRITE;
+ } else if (access & FILE_WRITE_DESIRE_ACCESS_LE) {
+ oflags |= O_WRONLY;
+ *may_flags = MAY_OPEN | MAY_WRITE;
+ } else {
+ oflags |= O_RDONLY;
+ *may_flags = MAY_OPEN | MAY_READ;
+ }
+
+ if (access == FILE_READ_ATTRIBUTES_LE)
+ oflags |= O_PATH;
+
+ if (file_present) {
+ switch (disposition & FILE_CREATE_MASK_LE) {
+ case FILE_OPEN_LE:
+ case FILE_CREATE_LE:
+ break;
+ case FILE_SUPERSEDE_LE:
+ case FILE_OVERWRITE_LE:
+ case FILE_OVERWRITE_IF_LE:
+ oflags |= O_TRUNC;
+ break;
+ default:
+ break;
+ }
+ } else {
+ switch (disposition & FILE_CREATE_MASK_LE) {
+ case FILE_SUPERSEDE_LE:
+ case FILE_CREATE_LE:
+ case FILE_OPEN_IF_LE:
+ case FILE_OVERWRITE_IF_LE:
+ oflags |= O_CREAT;
+ break;
+ case FILE_OPEN_LE:
+ case FILE_OVERWRITE_LE:
+ oflags &= ~O_CREAT;
+ break;
+ default:
+ break;
+ }
+ }
+
+ return oflags;
+}
+
+/**
+ * smb2_tree_disconnect() - handler for smb tree connect request
+ * @work: smb work containing request buffer
+ *
+ * Return: 0
+ */
+int smb2_tree_disconnect(struct ksmbd_work *work)
+{
+ struct smb2_tree_disconnect_rsp *rsp;
+ struct smb2_tree_disconnect_req *req;
+ struct ksmbd_session *sess = work->sess;
+ struct ksmbd_tree_connect *tcon = work->tcon;
+ int err;
+
+ WORK_BUFFERS(work, req, rsp);
+
+ ksmbd_debug(SMB, "request\n");
+
+ if (!tcon) {
+ ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
+
+ rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
+ err = -ENOENT;
+ goto err_out;
+ }
+
+ ksmbd_close_tree_conn_fds(work);
+
+ write_lock(&sess->tree_conns_lock);
+ if (tcon->t_state == TREE_DISCONNECTED) {
+ write_unlock(&sess->tree_conns_lock);
+ rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
+ err = -ENOENT;
+ goto err_out;
+ }
+
+ WARN_ON_ONCE(atomic_dec_and_test(&tcon->refcount));
+ tcon->t_state = TREE_DISCONNECTED;
+ write_unlock(&sess->tree_conns_lock);
+
+ err = ksmbd_tree_conn_disconnect(sess, tcon);
+ if (err) {
+ rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
+ goto err_out;
+ }
+
+ work->tcon = NULL;
+
+ rsp->StructureSize = cpu_to_le16(4);
+ err = ksmbd_iov_pin_rsp(work, rsp,
+ sizeof(struct smb2_tree_disconnect_rsp));
+ if (err) {
+ rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
+ goto err_out;
+ }
+
+ return 0;
+
+err_out:
+ smb2_set_err_rsp(work);
+ return err;
+
+}
+
+/**
+ * smb2_session_logoff() - handler for session log off request
+ * @work: smb work containing request buffer
+ *
+ * Return: 0
+ */
+int smb2_session_logoff(struct ksmbd_work *work)
+{
+ struct ksmbd_conn *conn = work->conn;
+ struct smb2_logoff_req *req;
+ struct smb2_logoff_rsp *rsp;
+ struct ksmbd_session *sess;
+ u64 sess_id;
+ int err;
+
+ WORK_BUFFERS(work, req, rsp);
+
+ ksmbd_debug(SMB, "request\n");
+
+ ksmbd_conn_lock(conn);
+ if (!ksmbd_conn_good(conn)) {
+ ksmbd_conn_unlock(conn);
+ rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
+ smb2_set_err_rsp(work);
+ return -ENOENT;
+ }
+ sess_id = le64_to_cpu(req->hdr.SessionId);
+ ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_RECONNECT);
+ ksmbd_conn_unlock(conn);
+
+ ksmbd_close_session_fds(work);
+ ksmbd_conn_wait_idle(conn, sess_id);
+
+ /*
+ * Re-lookup session to validate if session is deleted
+ * while waiting request complete
+ */
+ sess = ksmbd_session_lookup_all(conn, sess_id);
+ if (ksmbd_tree_conn_session_logoff(sess)) {
+ ksmbd_debug(SMB, "Invalid tid %d\n", req->hdr.Id.SyncId.TreeId);
+ rsp->hdr.Status = STATUS_NETWORK_NAME_DELETED;
+ smb2_set_err_rsp(work);
+ return -ENOENT;
+ }
+
+ ksmbd_destroy_file_table(&sess->file_table);
+ sess->state = SMB2_SESSION_EXPIRED;
+
+ ksmbd_free_user(sess->user);
+ sess->user = NULL;
+ ksmbd_all_conn_set_status(sess_id, KSMBD_SESS_NEED_NEGOTIATE);
+
+ rsp->StructureSize = cpu_to_le16(4);
+ err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_logoff_rsp));
+ if (err) {
+ rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
+ smb2_set_err_rsp(work);
+ return err;
+ }
+ return 0;
+}
+
+/**
+ * create_smb2_pipe() - create IPC pipe
+ * @work: smb work containing request buffer
+ *
+ * Return: 0 on success, otherwise error
+ */
+static noinline int create_smb2_pipe(struct ksmbd_work *work)
+{
+ struct smb2_create_rsp *rsp;
+ struct smb2_create_req *req;
+ int id;
+ int err;
+ char *name;
+
+ WORK_BUFFERS(work, req, rsp);
+
+ name = smb_strndup_from_utf16(req->Buffer, le16_to_cpu(req->NameLength),
+ 1, work->conn->local_nls);
+ if (IS_ERR(name)) {
+ rsp->hdr.Status = STATUS_NO_MEMORY;
+ err = PTR_ERR(name);
+ goto out;
+ }
+
+ id = ksmbd_session_rpc_open(work->sess, name);
+ if (id < 0) {
+ pr_err("Unable to open RPC pipe: %d\n", id);
+ err = id;
+ goto out;
+ }
+
+ rsp->hdr.Status = STATUS_SUCCESS;
+ rsp->StructureSize = cpu_to_le16(89);
+ rsp->OplockLevel = SMB2_OPLOCK_LEVEL_NONE;
+ rsp->Flags = 0;
+ rsp->CreateAction = cpu_to_le32(FILE_OPENED);
+
+ rsp->CreationTime = cpu_to_le64(0);
+ rsp->LastAccessTime = cpu_to_le64(0);
+ rsp->ChangeTime = cpu_to_le64(0);
+ rsp->AllocationSize = cpu_to_le64(0);
+ rsp->EndofFile = cpu_to_le64(0);
+ rsp->FileAttributes = FILE_ATTRIBUTE_NORMAL_LE;
+ rsp->Reserved2 = 0;
+ rsp->VolatileFileId = id;
+ rsp->PersistentFileId = 0;
+ rsp->CreateContextsOffset = 0;
+ rsp->CreateContextsLength = 0;
+
+ err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_create_rsp, Buffer));
+ if (err)
+ goto out;
+
+ kfree(name);
+ return 0;
+
+out:
+ switch (err) {
+ case -EINVAL:
+ rsp->hdr.Status = STATUS_INVALID_PARAMETER;
+ break;
+ case -ENOSPC:
+ case -ENOMEM:
+ rsp->hdr.Status = STATUS_NO_MEMORY;
+ break;
+ }
+
+ if (!IS_ERR(name))
+ kfree(name);
+
+ smb2_set_err_rsp(work);
+ return err;
+}
+
+/**
+ * smb2_set_ea() - handler for setting extended attributes using set
+ * info command
+ * @eabuf: set info command buffer
+ * @buf_len: set info command buffer length
+ * @path: dentry path for get ea
+ * @get_write: get write access to a mount
+ *
+ * Return: 0 on success, otherwise error
+ */
+static int smb2_set_ea(struct smb2_ea_info *eabuf, unsigned int buf_len,
+ const struct path *path, bool get_write)
+{
+ struct mnt_idmap *idmap = mnt_idmap(path->mnt);
+ char *attr_name = NULL, *value;
+ int rc = 0;
+ unsigned int next = 0;
+
+ if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
+ le16_to_cpu(eabuf->EaValueLength))
+ return -EINVAL;
+
+ attr_name = kmalloc(XATTR_NAME_MAX + 1, GFP_KERNEL);
+ if (!attr_name)
+ return -ENOMEM;
+
+ do {
+ if (!eabuf->EaNameLength)
+ goto next;
+
+ ksmbd_debug(SMB,
+ "name : <%s>, name_len : %u, value_len : %u, next : %u\n",
+ eabuf->name, eabuf->EaNameLength,
+ le16_to_cpu(eabuf->EaValueLength),
+ le32_to_cpu(eabuf->NextEntryOffset));
+
+ if (eabuf->EaNameLength >
+ (XATTR_NAME_MAX - XATTR_USER_PREFIX_LEN)) {
+ rc = -EINVAL;
+ break;
+ }
+
+ memcpy(attr_name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN);
+ memcpy(&attr_name[XATTR_USER_PREFIX_LEN], eabuf->name,
+ eabuf->EaNameLength);
+ attr_name[XATTR_USER_PREFIX_LEN + eabuf->EaNameLength] = '\0';
+ value = (char *)&eabuf->name + eabuf->EaNameLength + 1;
+
+ if (!eabuf->EaValueLength) {
+ rc = ksmbd_vfs_casexattr_len(idmap,
+ path->dentry,
+ attr_name,
+ XATTR_USER_PREFIX_LEN +
+ eabuf->EaNameLength);
+
+ /* delete the EA only when it exits */
+ if (rc > 0) {
+ rc = ksmbd_vfs_remove_xattr(idmap,
+ path,
+ attr_name);
+
+ if (rc < 0) {
+ ksmbd_debug(SMB,
+ "remove xattr failed(%d)\n",
+ rc);
+ break;
+ }
+ }
+
+ /* if the EA doesn't exist, just do nothing. */
+ rc = 0;
+ } else {
+ rc = ksmbd_vfs_setxattr(idmap, path, attr_name, value,
+ le16_to_cpu(eabuf->EaValueLength),
+ 0, true);
+ if (rc < 0) {
+ ksmbd_debug(SMB,
+ "ksmbd_vfs_setxattr is failed(%d)\n",
+ rc);
+ break;
+ }
+ }
+
+next:
+ next = le32_to_cpu(eabuf->NextEntryOffset);
+ if (next == 0 || buf_len < next)
+ break;
+ buf_len -= next;
+ eabuf = (struct smb2_ea_info *)((char *)eabuf + next);
+ if (buf_len < sizeof(struct smb2_ea_info)) {
+ rc = -EINVAL;
+ break;
+ }
+
+ if (buf_len < sizeof(struct smb2_ea_info) + eabuf->EaNameLength +
+ le16_to_cpu(eabuf->EaValueLength)) {
+ rc = -EINVAL;
+ break;
+ }
+ } while (next != 0);
+
+ kfree(attr_name);
+ return rc;
+}
+
+static noinline int smb2_set_stream_name_xattr(const struct path *path,
+ struct ksmbd_file *fp,
+ char *stream_name, int s_type)
+{
+ struct mnt_idmap *idmap = mnt_idmap(path->mnt);
+ size_t xattr_stream_size;
+ char *xattr_stream_name;
+ int rc;
+
+ rc = ksmbd_vfs_xattr_stream_name(stream_name,
+ &xattr_stream_name,
+ &xattr_stream_size,
+ s_type);
+ if (rc)
+ return rc;
+
+ fp->stream.name = xattr_stream_name;
+ fp->stream.size = xattr_stream_size;
+
+ /* Check if there is stream prefix in xattr space */
+ rc = ksmbd_vfs_casexattr_len(idmap,
+ path->dentry,
+ xattr_stream_name,
+ xattr_stream_size);
+ if (rc >= 0)
+ return 0;
+
+ if (fp->cdoption == FILE_OPEN_LE) {
+ ksmbd_debug(SMB, "XATTR stream name lookup failed: %d\n", rc);
+ return -EBADF;
+ }
+
+ rc = ksmbd_vfs_setxattr(idmap, path, xattr_stream_name, NULL, 0, 0, false);
+ if (rc < 0)
+ pr_err("Failed to store XATTR stream name :%d\n", rc);
+ return 0;
+}
+
+static int smb2_remove_smb_xattrs(const struct path *path)
+{
+ struct mnt_idmap *idmap = mnt_idmap(path->mnt);
+ char *name, *xattr_list = NULL;
+ ssize_t xattr_list_len;
+ int err = 0;
+
+ xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
+ if (xattr_list_len < 0) {
+ goto out;
+ } else if (!xattr_list_len) {
+ ksmbd_debug(SMB, "empty xattr in the file\n");
+ goto out;
+ }
+
+ for (name = xattr_list; name - xattr_list < xattr_list_len;
+ name += strlen(name) + 1) {
+ ksmbd_debug(SMB, "%s, len %zd\n", name, strlen(name));
+
+ if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN) &&
+ !strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
+ STREAM_PREFIX_LEN)) {
+ err = ksmbd_vfs_remove_xattr(idmap, path,
+ name);
+ if (err)
+ ksmbd_debug(SMB, "remove xattr failed : %s\n",
+ name);
+ }
+ }
+out:
+ kvfree(xattr_list);
+ return err;
+}
+
+static int smb2_create_truncate(const struct path *path)
+{
+ int rc = vfs_truncate(path, 0);
+
+ if (rc) {
+ pr_err("vfs_truncate failed, rc %d\n", rc);
+ return rc;
+ }
+
+ rc = smb2_remove_smb_xattrs(path);
+ if (rc == -EOPNOTSUPP)
+ rc = 0;
+ if (rc)
+ ksmbd_debug(SMB,
+ "ksmbd_truncate_stream_name_xattr failed, rc %d\n",
+ rc);
+ return rc;
+}
+
+static void smb2_new_xattrs(struct ksmbd_tree_connect *tcon, const struct path *path,
+ struct ksmbd_file *fp)
+{
+ struct xattr_dos_attrib da = {0};
+ int rc;
+
+ if (!test_share_config_flag(tcon->share_conf,
+ KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
+ return;
+
+ da.version = 4;
+ da.attr = le32_to_cpu(fp->f_ci->m_fattr);
+ da.itime = da.create_time = fp->create_time;
+ da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
+ XATTR_DOSINFO_ITIME;
+
+ rc = ksmbd_vfs_set_dos_attrib_xattr(mnt_idmap(path->mnt), path, &da, false);
+ if (rc)
+ ksmbd_debug(SMB, "failed to store file attribute into xattr\n");
+}
+
+static void smb2_update_xattrs(struct ksmbd_tree_connect *tcon,
+ const struct path *path, struct ksmbd_file *fp)
+{
+ struct xattr_dos_attrib da;
+ int rc;
+
+ fp->f_ci->m_fattr &= ~(FILE_ATTRIBUTE_HIDDEN_LE | FILE_ATTRIBUTE_SYSTEM_LE);
+
+ /* get FileAttributes from XATTR_NAME_DOS_ATTRIBUTE */
+ if (!test_share_config_flag(tcon->share_conf,
+ KSMBD_SHARE_FLAG_STORE_DOS_ATTRS))
+ return;
+
+ rc = ksmbd_vfs_get_dos_attrib_xattr(mnt_idmap(path->mnt),
+ path->dentry, &da);
+ if (rc > 0) {
+ fp->f_ci->m_fattr = cpu_to_le32(da.attr);
+ fp->create_time = da.create_time;
+ fp->itime = da.itime;
+ }
+}
+
+static int smb2_creat(struct ksmbd_work *work, struct path *parent_path,
+ struct path *path, char *name, int open_flags,
+ umode_t posix_mode, bool is_dir)
+{
+ struct ksmbd_tree_connect *tcon = work->tcon;
+ struct ksmbd_share_config *share = tcon->share_conf;
+ umode_t mode;
+ int rc;
+
+ if (!(open_flags & O_CREAT))
+ return -EBADF;
+
+ ksmbd_debug(SMB, "file does not exist, so creating\n");
+ if (is_dir == true) {
+ ksmbd_debug(SMB, "creating directory\n");
+
+ mode = share_config_directory_mode(share, posix_mode);
+ rc = ksmbd_vfs_mkdir(work, name, mode);
+ if (rc)
+ return rc;
+ } else {
+ ksmbd_debug(SMB, "creating regular file\n");
+
+ mode = share_config_create_mode(share, posix_mode);
+ rc = ksmbd_vfs_create(work, name, mode);
+ if (rc)
+ return rc;
+ }
+
+ rc = ksmbd_vfs_kern_path_locked(work, name, 0, parent_path, path, 0);
+ if (rc) {
+ pr_err("cannot get linux path (%s), err = %d\n",
+ name, rc);
+ return rc;
+ }
+ return 0;
+}
+
+static int smb2_create_sd_buffer(struct ksmbd_work *work,
+ struct smb2_create_req *req,
+ const struct path *path)
+{
+ struct create_context *context;
+ struct create_sd_buf_req *sd_buf;
+
+ if (!req->CreateContextsOffset)
+ return -ENOENT;
+
+ /* Parse SD BUFFER create contexts */
+ context = smb2_find_context_vals(req, SMB2_CREATE_SD_BUFFER, 4);
+ if (!context)
+ return -ENOENT;
+ else if (IS_ERR(context))
+ return PTR_ERR(context);
+
+ ksmbd_debug(SMB,
+ "Set ACLs using SMB2_CREATE_SD_BUFFER context\n");
+ sd_buf = (struct create_sd_buf_req *)context;
+ if (le16_to_cpu(context->DataOffset) +
+ le32_to_cpu(context->DataLength) <
+ sizeof(struct create_sd_buf_req))
+ return -EINVAL;
+ return set_info_sec(work->conn, work->tcon, path, &sd_buf->ntsd,
+ le32_to_cpu(sd_buf->ccontext.DataLength), true, false);
+}
+
+static void ksmbd_acls_fattr(struct smb_fattr *fattr,
+ struct mnt_idmap *idmap,
+ struct inode *inode)
+{
+ vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);
+ vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
+
+ fattr->cf_uid = vfsuid_into_kuid(vfsuid);
+ fattr->cf_gid = vfsgid_into_kgid(vfsgid);
+ fattr->cf_mode = inode->i_mode;
+ fattr->cf_acls = NULL;
+ fattr->cf_dacls = NULL;
+
+ if (IS_ENABLED(CONFIG_FS_POSIX_ACL)) {
+ fattr->cf_acls = get_inode_acl(inode, ACL_TYPE_ACCESS);
+ if (S_ISDIR(inode->i_mode))
+ fattr->cf_dacls = get_inode_acl(inode, ACL_TYPE_DEFAULT);
+ }
+}
+
+/**
+ * smb2_open() - handler for smb file open request
+ * @work: smb work containing request buffer
+ *
+ * Return: 0 on success, otherwise error
+ */
+int smb2_open(struct ksmbd_work *work)
+{
+ struct ksmbd_conn *conn = work->conn;
+ struct ksmbd_session *sess = work->sess;
+ struct ksmbd_tree_connect *tcon = work->tcon;
+ struct smb2_create_req *req;
+ struct smb2_create_rsp *rsp;
+ struct path path, parent_path;
+ struct ksmbd_share_config *share = tcon->share_conf;
+ struct ksmbd_file *fp = NULL;
+ struct file *filp = NULL;
+ struct mnt_idmap *idmap = NULL;
+ struct kstat stat;
+ struct create_context *context;
+ struct lease_ctx_info *lc = NULL;
+ struct create_ea_buf_req *ea_buf = NULL;
+ struct oplock_info *opinfo;
+ __le32 *next_ptr = NULL;
+ int req_op_level = 0, open_flags = 0, may_flags = 0, file_info = 0;
+ int rc = 0;
+ int contxt_cnt = 0, query_disk_id = 0;
+ int maximal_access_ctxt = 0, posix_ctxt = 0;
+ int s_type = 0;
+ int next_off = 0;
+ char *name = NULL;
+ char *stream_name = NULL;
+ bool file_present = false, created = false, already_permitted = false;
+ int share_ret, need_truncate = 0;
+ u64 time;
+ umode_t posix_mode = 0;
+ __le32 daccess, maximal_access = 0;
+ int iov_len = 0;
+
+ WORK_BUFFERS(work, req, rsp);
+
+ if (req->hdr.NextCommand && !work->next_smb2_rcv_hdr_off &&
+ (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)) {
+ ksmbd_debug(SMB, "invalid flag in chained command\n");
+ rsp->hdr.Status = STATUS_INVALID_PARAMETER;
+ smb2_set_err_rsp(work);
+ return -EINVAL;
+ }
+
+ if (test_share_config_flag(share, KSMBD_SHARE_FLAG_PIPE)) {
+ ksmbd_debug(SMB, "IPC pipe create request\n");
+ return create_smb2_pipe(work);
+ }
+
+ if (req->NameLength) {
+ if ((req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
+ *(char *)req->Buffer == '\\') {
+ pr_err("not allow directory name included leading slash\n");
+ rc = -EINVAL;
+ goto err_out2;
+ }
+
+ name = smb2_get_name(req->Buffer,
+ le16_to_cpu(req->NameLength),
+ work->conn->local_nls);
+ if (IS_ERR(name)) {
+ rc = PTR_ERR(name);
+ if (rc != -ENOMEM)
+ rc = -ENOENT;
+ name = NULL;
+ goto err_out2;
+ }
+
+ ksmbd_debug(SMB, "converted name = %s\n", name);
+ if (strchr(name, ':')) {
+ if (!test_share_config_flag(work->tcon->share_conf,
+ KSMBD_SHARE_FLAG_STREAMS)) {
+ rc = -EBADF;
+ goto err_out2;
+ }
+ rc = parse_stream_name(name, &stream_name, &s_type);
+ if (rc < 0)
+ goto err_out2;
+ }
+
+ rc = ksmbd_validate_filename(name);
+ if (rc < 0)
+ goto err_out2;
+
+ if (ksmbd_share_veto_filename(share, name)) {
+ rc = -ENOENT;
+ ksmbd_debug(SMB, "Reject open(), vetoed file: %s\n",
+ name);
+ goto err_out2;
+ }
+ } else {
+ name = kstrdup("", GFP_KERNEL);
+ if (!name) {
+ rc = -ENOMEM;
+ goto err_out2;
+ }
+ }
+
+ if (le32_to_cpu(req->ImpersonationLevel) > le32_to_cpu(IL_DELEGATE)) {
+ pr_err("Invalid impersonationlevel : 0x%x\n",
+ le32_to_cpu(req->ImpersonationLevel));
+ rc = -EIO;
+ rsp->hdr.Status = STATUS_BAD_IMPERSONATION_LEVEL;
+ goto err_out2;
+ }
+
+ if (req->CreateOptions && !(req->CreateOptions & CREATE_OPTIONS_MASK_LE)) {
+ pr_err("Invalid create options : 0x%x\n",
+ le32_to_cpu(req->CreateOptions));
+ rc = -EINVAL;
+ goto err_out2;
+ } else {
+ if (req->CreateOptions & FILE_SEQUENTIAL_ONLY_LE &&
+ req->CreateOptions & FILE_RANDOM_ACCESS_LE)
+ req->CreateOptions = ~(FILE_SEQUENTIAL_ONLY_LE);
+
+ if (req->CreateOptions &
+ (FILE_OPEN_BY_FILE_ID_LE | CREATE_TREE_CONNECTION |
+ FILE_RESERVE_OPFILTER_LE)) {
+ rc = -EOPNOTSUPP;
+ goto err_out2;
+ }
+
+ if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
+ if (req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE) {
+ rc = -EINVAL;
+ goto err_out2;
+ } else if (req->CreateOptions & FILE_NO_COMPRESSION_LE) {
+ req->CreateOptions = ~(FILE_NO_COMPRESSION_LE);
+ }
+ }
+ }
+
+ if (le32_to_cpu(req->CreateDisposition) >
+ le32_to_cpu(FILE_OVERWRITE_IF_LE)) {
+ pr_err("Invalid create disposition : 0x%x\n",
+ le32_to_cpu(req->CreateDisposition));
+ rc = -EINVAL;
+ goto err_out2;
+ }
+
+ if (!(req->DesiredAccess & DESIRED_ACCESS_MASK)) {
+ pr_err("Invalid desired access : 0x%x\n",
+ le32_to_cpu(req->DesiredAccess));
+ rc = -EACCES;
+ goto err_out2;
+ }
+
+ if (req->FileAttributes && !(req->FileAttributes & FILE_ATTRIBUTE_MASK_LE)) {
+ pr_err("Invalid file attribute : 0x%x\n",
+ le32_to_cpu(req->FileAttributes));
+ rc = -EINVAL;
+ goto err_out2;
+ }
+
+ if (req->CreateContextsOffset) {
+ /* Parse non-durable handle create contexts */
+ context = smb2_find_context_vals(req, SMB2_CREATE_EA_BUFFER, 4);
+ if (IS_ERR(context)) {
+ rc = PTR_ERR(context);
+ goto err_out2;
+ } else if (context) {
+ ea_buf = (struct create_ea_buf_req *)context;
+ if (le16_to_cpu(context->DataOffset) +
+ le32_to_cpu(context->DataLength) <
+ sizeof(struct create_ea_buf_req)) {
+ rc = -EINVAL;
+ goto err_out2;
+ }
+ if (req->CreateOptions & FILE_NO_EA_KNOWLEDGE_LE) {
+ rsp->hdr.Status = STATUS_ACCESS_DENIED;
+ rc = -EACCES;
+ goto err_out2;
+ }
+ }
+
+ context = smb2_find_context_vals(req,
+ SMB2_CREATE_QUERY_MAXIMAL_ACCESS_REQUEST, 4);
+ if (IS_ERR(context)) {
+ rc = PTR_ERR(context);
+ goto err_out2;
+ } else if (context) {
+ ksmbd_debug(SMB,
+ "get query maximal access context\n");
+ maximal_access_ctxt = 1;
+ }
+
+ context = smb2_find_context_vals(req,
+ SMB2_CREATE_TIMEWARP_REQUEST, 4);
+ if (IS_ERR(context)) {
+ rc = PTR_ERR(context);
+ goto err_out2;
+ } else if (context) {
+ ksmbd_debug(SMB, "get timewarp context\n");
+ rc = -EBADF;
+ goto err_out2;
+ }
+
+ if (tcon->posix_extensions) {
+ context = smb2_find_context_vals(req,
+ SMB2_CREATE_TAG_POSIX, 16);
+ if (IS_ERR(context)) {
+ rc = PTR_ERR(context);
+ goto err_out2;
+ } else if (context) {
+ struct create_posix *posix =
+ (struct create_posix *)context;
+ if (le16_to_cpu(context->DataOffset) +
+ le32_to_cpu(context->DataLength) <
+ sizeof(struct create_posix) - 4) {
+ rc = -EINVAL;
+ goto err_out2;
+ }
+ ksmbd_debug(SMB, "get posix context\n");
+
+ posix_mode = le32_to_cpu(posix->Mode);
+ posix_ctxt = 1;
+ }
+ }
+ }
+
+ if (ksmbd_override_fsids(work)) {
+ rc = -ENOMEM;
+ goto err_out2;
+ }
+
+ rc = ksmbd_vfs_kern_path_locked(work, name, LOOKUP_NO_SYMLINKS,
+ &parent_path, &path, 1);
+ if (!rc) {
+ file_present = true;
+
+ if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE) {
+ /*
+ * If file exists with under flags, return access
+ * denied error.
+ */
+ if (req->CreateDisposition == FILE_OVERWRITE_IF_LE ||
+ req->CreateDisposition == FILE_OPEN_IF_LE) {
+ rc = -EACCES;
+ goto err_out;
+ }
+
+ if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
+ ksmbd_debug(SMB,
+ "User does not have write permission\n");
+ rc = -EACCES;
+ goto err_out;
+ }
+ } else if (d_is_symlink(path.dentry)) {
+ rc = -EACCES;
+ goto err_out;
+ }
+
+ file_present = true;
+ idmap = mnt_idmap(path.mnt);
+ } else {
+ if (rc != -ENOENT)
+ goto err_out;
+ ksmbd_debug(SMB, "can not get linux path for %s, rc = %d\n",
+ name, rc);
+ rc = 0;
+ }
+
+ if (stream_name) {
+ if (req->CreateOptions & FILE_DIRECTORY_FILE_LE) {
+ if (s_type == DATA_STREAM) {
+ rc = -EIO;
+ rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
+ }
+ } else {
+ if (file_present && S_ISDIR(d_inode(path.dentry)->i_mode) &&
+ s_type == DATA_STREAM) {
+ rc = -EIO;
+ rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
+ }
+ }
+
+ if (req->CreateOptions & FILE_DIRECTORY_FILE_LE &&
+ req->FileAttributes & FILE_ATTRIBUTE_NORMAL_LE) {
+ rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
+ rc = -EIO;
+ }
+
+ if (rc < 0)
+ goto err_out;
+ }
+
+ if (file_present && req->CreateOptions & FILE_NON_DIRECTORY_FILE_LE &&
+ S_ISDIR(d_inode(path.dentry)->i_mode) &&
+ !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
+ ksmbd_debug(SMB, "open() argument is a directory: %s, %x\n",
+ name, req->CreateOptions);
+ rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
+ rc = -EIO;
+ goto err_out;
+ }
+
+ if (file_present && (req->CreateOptions & FILE_DIRECTORY_FILE_LE) &&
+ !(req->CreateDisposition == FILE_CREATE_LE) &&
+ !S_ISDIR(d_inode(path.dentry)->i_mode)) {
+ rsp->hdr.Status = STATUS_NOT_A_DIRECTORY;
+ rc = -EIO;
+ goto err_out;
+ }
+
+ if (!stream_name && file_present &&
+ req->CreateDisposition == FILE_CREATE_LE) {
+ rc = -EEXIST;
+ goto err_out;
+ }
+
+ daccess = smb_map_generic_desired_access(req->DesiredAccess);
+
+ if (file_present && !(req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
+ rc = smb_check_perm_dacl(conn, &path, &daccess,
+ sess->user->uid);
+ if (rc)
+ goto err_out;
+ }
+
+ if (daccess & FILE_MAXIMAL_ACCESS_LE) {
+ if (!file_present) {
+ daccess = cpu_to_le32(GENERIC_ALL_FLAGS);
+ } else {
+ ksmbd_vfs_query_maximal_access(idmap,
+ path.dentry,
+ &daccess);
+ already_permitted = true;
+ }
+ maximal_access = daccess;
+ }
+
+ open_flags = smb2_create_open_flags(file_present, daccess,
+ req->CreateDisposition,
+ &may_flags);
+
+ if (!test_tree_conn_flag(tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
+ if (open_flags & (O_CREAT | O_TRUNC)) {
+ ksmbd_debug(SMB,
+ "User does not have write permission\n");
+ rc = -EACCES;
+ goto err_out;
+ }
+ }
+
+ /*create file if not present */
+ if (!file_present) {
+ rc = smb2_creat(work, &parent_path, &path, name, open_flags,
+ posix_mode,
+ req->CreateOptions & FILE_DIRECTORY_FILE_LE);
+ if (rc) {
+ if (rc == -ENOENT) {
+ rc = -EIO;
+ rsp->hdr.Status = STATUS_OBJECT_PATH_NOT_FOUND;
+ }
+ goto err_out;
+ }
+
+ created = true;
+ idmap = mnt_idmap(path.mnt);
+ if (ea_buf) {
+ if (le32_to_cpu(ea_buf->ccontext.DataLength) <
+ sizeof(struct smb2_ea_info)) {
+ rc = -EINVAL;
+ goto err_out;
+ }
+
+ rc = smb2_set_ea(&ea_buf->ea,
+ le32_to_cpu(ea_buf->ccontext.DataLength),
+ &path, false);
+ if (rc == -EOPNOTSUPP)
+ rc = 0;
+ else if (rc)
+ goto err_out;
+ }
+ } else if (!already_permitted) {
+ /* FILE_READ_ATTRIBUTE is allowed without inode_permission,
+ * because execute(search) permission on a parent directory,
+ * is already granted.
+ */
+ if (daccess & ~(FILE_READ_ATTRIBUTES_LE | FILE_READ_CONTROL_LE)) {
+ rc = inode_permission(idmap,
+ d_inode(path.dentry),
+ may_flags);
+ if (rc)
+ goto err_out;
+
+ if ((daccess & FILE_DELETE_LE) ||
+ (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)) {
+ rc = inode_permission(idmap,
+ d_inode(path.dentry->d_parent),
+ MAY_EXEC | MAY_WRITE);
+ if (rc)
+ goto err_out;
+ }
+ }
+ }
+
+ rc = ksmbd_query_inode_status(path.dentry->d_parent);
+ if (rc == KSMBD_INODE_STATUS_PENDING_DELETE) {
+ rc = -EBUSY;
+ goto err_out;
+ }
+
+ rc = 0;
+ filp = dentry_open(&path, open_flags, current_cred());
+ if (IS_ERR(filp)) {
+ rc = PTR_ERR(filp);
+ pr_err("dentry open for dir failed, rc %d\n", rc);
+ goto err_out;
+ }
+
+ if (file_present) {
+ if (!(open_flags & O_TRUNC))
+ file_info = FILE_OPENED;
+ else
+ file_info = FILE_OVERWRITTEN;
+
+ if ((req->CreateDisposition & FILE_CREATE_MASK_LE) ==
+ FILE_SUPERSEDE_LE)
+ file_info = FILE_SUPERSEDED;
+ } else if (open_flags & O_CREAT) {
+ file_info = FILE_CREATED;
+ }
+
+ ksmbd_vfs_set_fadvise(filp, req->CreateOptions);
+
+ /* Obtain Volatile-ID */
+ fp = ksmbd_open_fd(work, filp);
+ if (IS_ERR(fp)) {
+ fput(filp);
+ rc = PTR_ERR(fp);
+ fp = NULL;
+ goto err_out;
+ }
+
+ /* Get Persistent-ID */
+ ksmbd_open_durable_fd(fp);
+ if (!has_file_id(fp->persistent_id)) {
+ rc = -ENOMEM;
+ goto err_out;
+ }
+
+ fp->cdoption = req->CreateDisposition;
+ fp->daccess = daccess;
+ fp->saccess = req->ShareAccess;
+ fp->coption = req->CreateOptions;
+
+ /* Set default windows and posix acls if creating new file */
+ if (created) {
+ int posix_acl_rc;
+ struct inode *inode = d_inode(path.dentry);
+
+ posix_acl_rc = ksmbd_vfs_inherit_posix_acl(idmap,
+ &path,
+ d_inode(path.dentry->d_parent));
+ if (posix_acl_rc)
+ ksmbd_debug(SMB, "inherit posix acl failed : %d\n", posix_acl_rc);
+
+ if (test_share_config_flag(work->tcon->share_conf,
+ KSMBD_SHARE_FLAG_ACL_XATTR)) {
+ rc = smb_inherit_dacl(conn, &path, sess->user->uid,
+ sess->user->gid);
+ }
+
+ if (rc) {
+ rc = smb2_create_sd_buffer(work, req, &path);
+ if (rc) {
+ if (posix_acl_rc)
+ ksmbd_vfs_set_init_posix_acl(idmap,
+ &path);
+
+ if (test_share_config_flag(work->tcon->share_conf,
+ KSMBD_SHARE_FLAG_ACL_XATTR)) {
+ struct smb_fattr fattr;
+ struct smb_ntsd *pntsd;
+ int pntsd_size, ace_num = 0;
+
+ ksmbd_acls_fattr(&fattr, idmap, inode);
+ if (fattr.cf_acls)
+ ace_num = fattr.cf_acls->a_count;
+ if (fattr.cf_dacls)
+ ace_num += fattr.cf_dacls->a_count;
+
+ pntsd = kmalloc(sizeof(struct smb_ntsd) +
+ sizeof(struct smb_sid) * 3 +
+ sizeof(struct smb_acl) +
+ sizeof(struct smb_ace) * ace_num * 2,
+ GFP_KERNEL);
+ if (!pntsd) {
+ posix_acl_release(fattr.cf_acls);
+ posix_acl_release(fattr.cf_dacls);
+ goto err_out;
+ }
+
+ rc = build_sec_desc(idmap,
+ pntsd, NULL, 0,
+ OWNER_SECINFO |
+ GROUP_SECINFO |
+ DACL_SECINFO,
+ &pntsd_size, &fattr);
+ posix_acl_release(fattr.cf_acls);
+ posix_acl_release(fattr.cf_dacls);
+ if (rc) {
+ kfree(pntsd);
+ goto err_out;
+ }
+
+ rc = ksmbd_vfs_set_sd_xattr(conn,
+ idmap,
+ &path,
+ pntsd,
+ pntsd_size,
+ false);
+ kfree(pntsd);
+ if (rc)
+ pr_err("failed to store ntacl in xattr : %d\n",
+ rc);
+ }
+ }
+ }
+ rc = 0;
+ }
+
+ if (stream_name) {
+ rc = smb2_set_stream_name_xattr(&path,
+ fp,
+ stream_name,
+ s_type);
+ if (rc)
+ goto err_out;
+ file_info = FILE_CREATED;
+ }
+
+ fp->attrib_only = !(req->DesiredAccess & ~(FILE_READ_ATTRIBUTES_LE |
+ FILE_WRITE_ATTRIBUTES_LE | FILE_SYNCHRONIZE_LE));
+
+ /* fp should be searchable through ksmbd_inode.m_fp_list
+ * after daccess, saccess, attrib_only, and stream are
+ * initialized.
+ */
+ write_lock(&fp->f_ci->m_lock);
+ list_add(&fp->node, &fp->f_ci->m_fp_list);
+ write_unlock(&fp->f_ci->m_lock);
+
+ /* Check delete pending among previous fp before oplock break */
+ if (ksmbd_inode_pending_delete(fp)) {
+ rc = -EBUSY;
+ goto err_out;
+ }
+
+ rc = ksmbd_vfs_getattr(&path, &stat);
+ if (rc)
+ goto err_out;
+
+ if (stat.result_mask & STATX_BTIME)
+ fp->create_time = ksmbd_UnixTimeToNT(stat.btime);
+ else
+ fp->create_time = ksmbd_UnixTimeToNT(stat.ctime);
+ if (req->FileAttributes || fp->f_ci->m_fattr == 0)
+ fp->f_ci->m_fattr =
+ cpu_to_le32(smb2_get_dos_mode(&stat, le32_to_cpu(req->FileAttributes)));
+
+ if (!created)
+ smb2_update_xattrs(tcon, &path, fp);
+ else
+ smb2_new_xattrs(tcon, &path, fp);
+
+ if (file_present || created)
+ ksmbd_vfs_kern_path_unlock(&parent_path, &path);
+
+ if (!S_ISDIR(file_inode(filp)->i_mode) && open_flags & O_TRUNC &&
+ !fp->attrib_only && !stream_name) {
+ smb_break_all_oplock(work, fp);
+ need_truncate = 1;
+ }
+
+ req_op_level = req->RequestedOplockLevel;
+ if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE)
+ lc = parse_lease_state(req, S_ISDIR(file_inode(filp)->i_mode));
+
+ share_ret = ksmbd_smb_check_shared_mode(fp->filp, fp);
+ if (!test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_OPLOCKS) ||
+ (req_op_level == SMB2_OPLOCK_LEVEL_LEASE &&
+ !(conn->vals->capabilities & SMB2_GLOBAL_CAP_LEASING))) {
+ if (share_ret < 0 && !S_ISDIR(file_inode(fp->filp)->i_mode)) {
+ rc = share_ret;
+ goto err_out1;
+ }
+ } else {
+ if (req_op_level == SMB2_OPLOCK_LEVEL_LEASE) {
+ /*
+ * Compare parent lease using parent key. If there is no
+ * a lease that has same parent key, Send lease break
+ * notification.
+ */
+ smb_send_parent_lease_break_noti(fp, lc);
+
+ req_op_level = smb2_map_lease_to_oplock(lc->req_state);
+ ksmbd_debug(SMB,
+ "lease req for(%s) req oplock state 0x%x, lease state 0x%x\n",
+ name, req_op_level, lc->req_state);
+ rc = find_same_lease_key(sess, fp->f_ci, lc);
+ if (rc)
+ goto err_out1;
+ } else if (open_flags == O_RDONLY &&
+ (req_op_level == SMB2_OPLOCK_LEVEL_BATCH ||
+ req_op_level == SMB2_OPLOCK_LEVEL_EXCLUSIVE))
+ req_op_level = SMB2_OPLOCK_LEVEL_II;
+
+ rc = smb_grant_oplock(work, req_op_level,
+ fp->persistent_id, fp,
+ le32_to_cpu(req->hdr.Id.SyncId.TreeId),
+ lc, share_ret);
+ if (rc < 0)
+ goto err_out1;
+ }
+
+ if (req->CreateOptions & FILE_DELETE_ON_CLOSE_LE)
+ ksmbd_fd_set_delete_on_close(fp, file_info);
+
+ if (need_truncate) {
+ rc = smb2_create_truncate(&fp->filp->f_path);
+ if (rc)
+ goto err_out1;
+ }
+
+ if (req->CreateContextsOffset) {
+ struct create_alloc_size_req *az_req;
+
+ az_req = (struct create_alloc_size_req *)smb2_find_context_vals(req,
+ SMB2_CREATE_ALLOCATION_SIZE, 4);
+ if (IS_ERR(az_req)) {
+ rc = PTR_ERR(az_req);
+ goto err_out1;
+ } else if (az_req) {
+ loff_t alloc_size;
+ int err;
+
+ if (le16_to_cpu(az_req->ccontext.DataOffset) +
+ le32_to_cpu(az_req->ccontext.DataLength) <
+ sizeof(struct create_alloc_size_req)) {
+ rc = -EINVAL;
+ goto err_out1;
+ }
+ alloc_size = le64_to_cpu(az_req->AllocationSize);
+ ksmbd_debug(SMB,
+ "request smb2 create allocate size : %llu\n",
+ alloc_size);
+ smb_break_all_levII_oplock(work, fp, 1);
+ err = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
+ alloc_size);
+ if (err < 0)
+ ksmbd_debug(SMB,
+ "vfs_fallocate is failed : %d\n",
+ err);
+ }
+
+ context = smb2_find_context_vals(req, SMB2_CREATE_QUERY_ON_DISK_ID, 4);
+ if (IS_ERR(context)) {
+ rc = PTR_ERR(context);
+ goto err_out1;
+ } else if (context) {
+ ksmbd_debug(SMB, "get query on disk id context\n");
+ query_disk_id = 1;
+ }
+ }
+
+ memcpy(fp->client_guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE);
+
+ rsp->StructureSize = cpu_to_le16(89);
+ rcu_read_lock();
+ opinfo = rcu_dereference(fp->f_opinfo);
+ rsp->OplockLevel = opinfo != NULL ? opinfo->level : 0;
+ rcu_read_unlock();
+ rsp->Flags = 0;
+ rsp->CreateAction = cpu_to_le32(file_info);
+ rsp->CreationTime = cpu_to_le64(fp->create_time);
+ time = ksmbd_UnixTimeToNT(stat.atime);
+ rsp->LastAccessTime = cpu_to_le64(time);
+ time = ksmbd_UnixTimeToNT(stat.mtime);
+ rsp->LastWriteTime = cpu_to_le64(time);
+ time = ksmbd_UnixTimeToNT(stat.ctime);
+ rsp->ChangeTime = cpu_to_le64(time);
+ rsp->AllocationSize = S_ISDIR(stat.mode) ? 0 :
+ cpu_to_le64(stat.blocks << 9);
+ rsp->EndofFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
+ rsp->FileAttributes = fp->f_ci->m_fattr;
+
+ rsp->Reserved2 = 0;
+
+ rsp->PersistentFileId = fp->persistent_id;
+ rsp->VolatileFileId = fp->volatile_id;
+
+ rsp->CreateContextsOffset = 0;
+ rsp->CreateContextsLength = 0;
+ iov_len = offsetof(struct smb2_create_rsp, Buffer);
+
+ /* If lease is request send lease context response */
+ if (opinfo && opinfo->is_lease) {
+ struct create_context *lease_ccontext;
+
+ ksmbd_debug(SMB, "lease granted on(%s) lease state 0x%x\n",
+ name, opinfo->o_lease->state);
+ rsp->OplockLevel = SMB2_OPLOCK_LEVEL_LEASE;
+
+ lease_ccontext = (struct create_context *)rsp->Buffer;
+ contxt_cnt++;
+ create_lease_buf(rsp->Buffer, opinfo->o_lease);
+ le32_add_cpu(&rsp->CreateContextsLength,
+ conn->vals->create_lease_size);
+ iov_len += conn->vals->create_lease_size;
+ next_ptr = &lease_ccontext->Next;
+ next_off = conn->vals->create_lease_size;
+ }
+
+ if (maximal_access_ctxt) {
+ struct create_context *mxac_ccontext;
+
+ if (maximal_access == 0)
+ ksmbd_vfs_query_maximal_access(idmap,
+ path.dentry,
+ &maximal_access);
+ mxac_ccontext = (struct create_context *)(rsp->Buffer +
+ le32_to_cpu(rsp->CreateContextsLength));
+ contxt_cnt++;
+ create_mxac_rsp_buf(rsp->Buffer +
+ le32_to_cpu(rsp->CreateContextsLength),
+ le32_to_cpu(maximal_access));
+ le32_add_cpu(&rsp->CreateContextsLength,
+ conn->vals->create_mxac_size);
+ iov_len += conn->vals->create_mxac_size;
+ if (next_ptr)
+ *next_ptr = cpu_to_le32(next_off);
+ next_ptr = &mxac_ccontext->Next;
+ next_off = conn->vals->create_mxac_size;
+ }
+
+ if (query_disk_id) {
+ struct create_context *disk_id_ccontext;
+
+ disk_id_ccontext = (struct create_context *)(rsp->Buffer +
+ le32_to_cpu(rsp->CreateContextsLength));
+ contxt_cnt++;
+ create_disk_id_rsp_buf(rsp->Buffer +
+ le32_to_cpu(rsp->CreateContextsLength),
+ stat.ino, tcon->id);
+ le32_add_cpu(&rsp->CreateContextsLength,
+ conn->vals->create_disk_id_size);
+ iov_len += conn->vals->create_disk_id_size;
+ if (next_ptr)
+ *next_ptr = cpu_to_le32(next_off);
+ next_ptr = &disk_id_ccontext->Next;
+ next_off = conn->vals->create_disk_id_size;
+ }
+
+ if (posix_ctxt) {
+ contxt_cnt++;
+ create_posix_rsp_buf(rsp->Buffer +
+ le32_to_cpu(rsp->CreateContextsLength),
+ fp);
+ le32_add_cpu(&rsp->CreateContextsLength,
+ conn->vals->create_posix_size);
+ iov_len += conn->vals->create_posix_size;
+ if (next_ptr)
+ *next_ptr = cpu_to_le32(next_off);
+ }
+
+ if (contxt_cnt > 0) {
+ rsp->CreateContextsOffset =
+ cpu_to_le32(offsetof(struct smb2_create_rsp, Buffer));
+ }
+
+err_out:
+ if (rc && (file_present || created))
+ ksmbd_vfs_kern_path_unlock(&parent_path, &path);
+
+err_out1:
+ ksmbd_revert_fsids(work);
+
+err_out2:
+ if (!rc) {
+ ksmbd_update_fstate(&work->sess->file_table, fp, FP_INITED);
+ rc = ksmbd_iov_pin_rsp(work, (void *)rsp, iov_len);
+ }
+ if (rc) {
+ if (rc == -EINVAL)
+ rsp->hdr.Status = STATUS_INVALID_PARAMETER;
+ else if (rc == -EOPNOTSUPP)
+ rsp->hdr.Status = STATUS_NOT_SUPPORTED;
+ else if (rc == -EACCES || rc == -ESTALE || rc == -EXDEV)
+ rsp->hdr.Status = STATUS_ACCESS_DENIED;
+ else if (rc == -ENOENT)
+ rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
+ else if (rc == -EPERM)
+ rsp->hdr.Status = STATUS_SHARING_VIOLATION;
+ else if (rc == -EBUSY)
+ rsp->hdr.Status = STATUS_DELETE_PENDING;
+ else if (rc == -EBADF)
+ rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
+ else if (rc == -ENOEXEC)
+ rsp->hdr.Status = STATUS_DUPLICATE_OBJECTID;
+ else if (rc == -ENXIO)
+ rsp->hdr.Status = STATUS_NO_SUCH_DEVICE;
+ else if (rc == -EEXIST)
+ rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
+ else if (rc == -EMFILE)
+ rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
+ if (!rsp->hdr.Status)
+ rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
+
+ if (fp)
+ ksmbd_fd_put(work, fp);
+ smb2_set_err_rsp(work);
+ ksmbd_debug(SMB, "Error response: %x\n", rsp->hdr.Status);
+ }
+
+ kfree(name);
+ kfree(lc);
+
+ return 0;
+}
+
+static int readdir_info_level_struct_sz(int info_level)
+{
+ switch (info_level) {
+ case FILE_FULL_DIRECTORY_INFORMATION:
+ return sizeof(struct file_full_directory_info);
+ case FILE_BOTH_DIRECTORY_INFORMATION:
+ return sizeof(struct file_both_directory_info);
+ case FILE_DIRECTORY_INFORMATION:
+ return sizeof(struct file_directory_info);
+ case FILE_NAMES_INFORMATION:
+ return sizeof(struct file_names_info);
+ case FILEID_FULL_DIRECTORY_INFORMATION:
+ return sizeof(struct file_id_full_dir_info);
+ case FILEID_BOTH_DIRECTORY_INFORMATION:
+ return sizeof(struct file_id_both_directory_info);
+ case SMB_FIND_FILE_POSIX_INFO:
+ return sizeof(struct smb2_posix_info);
+ default:
+ return -EOPNOTSUPP;
+ }
+}
+
+static int dentry_name(struct ksmbd_dir_info *d_info, int info_level)
+{
+ switch (info_level) {
+ case FILE_FULL_DIRECTORY_INFORMATION:
+ {
+ struct file_full_directory_info *ffdinfo;
+
+ ffdinfo = (struct file_full_directory_info *)d_info->rptr;
+ d_info->rptr += le32_to_cpu(ffdinfo->NextEntryOffset);
+ d_info->name = ffdinfo->FileName;
+ d_info->name_len = le32_to_cpu(ffdinfo->FileNameLength);
+ return 0;
+ }
+ case FILE_BOTH_DIRECTORY_INFORMATION:
+ {
+ struct file_both_directory_info *fbdinfo;
+
+ fbdinfo = (struct file_both_directory_info *)d_info->rptr;
+ d_info->rptr += le32_to_cpu(fbdinfo->NextEntryOffset);
+ d_info->name = fbdinfo->FileName;
+ d_info->name_len = le32_to_cpu(fbdinfo->FileNameLength);
+ return 0;
+ }
+ case FILE_DIRECTORY_INFORMATION:
+ {
+ struct file_directory_info *fdinfo;
+
+ fdinfo = (struct file_directory_info *)d_info->rptr;
+ d_info->rptr += le32_to_cpu(fdinfo->NextEntryOffset);
+ d_info->name = fdinfo->FileName;
+ d_info->name_len = le32_to_cpu(fdinfo->FileNameLength);
+ return 0;
+ }
+ case FILE_NAMES_INFORMATION:
+ {
+ struct file_names_info *fninfo;
+
+ fninfo = (struct file_names_info *)d_info->rptr;
+ d_info->rptr += le32_to_cpu(fninfo->NextEntryOffset);
+ d_info->name = fninfo->FileName;
+ d_info->name_len = le32_to_cpu(fninfo->FileNameLength);
+ return 0;
+ }
+ case FILEID_FULL_DIRECTORY_INFORMATION:
+ {
+ struct file_id_full_dir_info *dinfo;
+
+ dinfo = (struct file_id_full_dir_info *)d_info->rptr;
+ d_info->rptr += le32_to_cpu(dinfo->NextEntryOffset);
+ d_info->name = dinfo->FileName;
+ d_info->name_len = le32_to_cpu(dinfo->FileNameLength);
+ return 0;
+ }
+ case FILEID_BOTH_DIRECTORY_INFORMATION:
+ {
+ struct file_id_both_directory_info *fibdinfo;
+
+ fibdinfo = (struct file_id_both_directory_info *)d_info->rptr;
+ d_info->rptr += le32_to_cpu(fibdinfo->NextEntryOffset);
+ d_info->name = fibdinfo->FileName;
+ d_info->name_len = le32_to_cpu(fibdinfo->FileNameLength);
+ return 0;
+ }
+ case SMB_FIND_FILE_POSIX_INFO:
+ {
+ struct smb2_posix_info *posix_info;
+
+ posix_info = (struct smb2_posix_info *)d_info->rptr;
+ d_info->rptr += le32_to_cpu(posix_info->NextEntryOffset);
+ d_info->name = posix_info->name;
+ d_info->name_len = le32_to_cpu(posix_info->name_len);
+ return 0;
+ }
+ default:
+ return -EINVAL;
+ }
+}
+
+/**
+ * smb2_populate_readdir_entry() - encode directory entry in smb2 response
+ * buffer
+ * @conn: connection instance
+ * @info_level: smb information level
+ * @d_info: structure included variables for query dir
+ * @ksmbd_kstat: ksmbd wrapper of dirent stat information
+ *
+ * if directory has many entries, find first can't read it fully.
+ * find next might be called multiple times to read remaining dir entries
+ *
+ * Return: 0 on success, otherwise error
+ */
+static int smb2_populate_readdir_entry(struct ksmbd_conn *conn, int info_level,
+ struct ksmbd_dir_info *d_info,
+ struct ksmbd_kstat *ksmbd_kstat)
+{
+ int next_entry_offset = 0;
+ char *conv_name;
+ int conv_len;
+ void *kstat;
+ int struct_sz, rc = 0;
+
+ conv_name = ksmbd_convert_dir_info_name(d_info,
+ conn->local_nls,
+ &conv_len);
+ if (!conv_name)
+ return -ENOMEM;
+
+ /* Somehow the name has only terminating NULL bytes */
+ if (conv_len < 0) {
+ rc = -EINVAL;
+ goto free_conv_name;
+ }
+
+ struct_sz = readdir_info_level_struct_sz(info_level) + conv_len;
+ next_entry_offset = ALIGN(struct_sz, KSMBD_DIR_INFO_ALIGNMENT);
+ d_info->last_entry_off_align = next_entry_offset - struct_sz;
+
+ if (next_entry_offset > d_info->out_buf_len) {
+ d_info->out_buf_len = 0;
+ rc = -ENOSPC;
+ goto free_conv_name;
+ }
+
+ kstat = d_info->wptr;
+ if (info_level != FILE_NAMES_INFORMATION)
+ kstat = ksmbd_vfs_init_kstat(&d_info->wptr, ksmbd_kstat);
+
+ switch (info_level) {
+ case FILE_FULL_DIRECTORY_INFORMATION:
+ {
+ struct file_full_directory_info *ffdinfo;
+
+ ffdinfo = (struct file_full_directory_info *)kstat;
+ ffdinfo->FileNameLength = cpu_to_le32(conv_len);
+ ffdinfo->EaSize =
+ smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
+ if (ffdinfo->EaSize)
+ ffdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
+ if (d_info->hide_dot_file && d_info->name[0] == '.')
+ ffdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
+ memcpy(ffdinfo->FileName, conv_name, conv_len);
+ ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
+ break;
+ }
+ case FILE_BOTH_DIRECTORY_INFORMATION:
+ {
+ struct file_both_directory_info *fbdinfo;
+
+ fbdinfo = (struct file_both_directory_info *)kstat;
+ fbdinfo->FileNameLength = cpu_to_le32(conv_len);
+ fbdinfo->EaSize =
+ smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
+ if (fbdinfo->EaSize)
+ fbdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
+ fbdinfo->ShortNameLength = 0;
+ fbdinfo->Reserved = 0;
+ if (d_info->hide_dot_file && d_info->name[0] == '.')
+ fbdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
+ memcpy(fbdinfo->FileName, conv_name, conv_len);
+ fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
+ break;
+ }
+ case FILE_DIRECTORY_INFORMATION:
+ {
+ struct file_directory_info *fdinfo;
+
+ fdinfo = (struct file_directory_info *)kstat;
+ fdinfo->FileNameLength = cpu_to_le32(conv_len);
+ if (d_info->hide_dot_file && d_info->name[0] == '.')
+ fdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
+ memcpy(fdinfo->FileName, conv_name, conv_len);
+ fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
+ break;
+ }
+ case FILE_NAMES_INFORMATION:
+ {
+ struct file_names_info *fninfo;
+
+ fninfo = (struct file_names_info *)kstat;
+ fninfo->FileNameLength = cpu_to_le32(conv_len);
+ memcpy(fninfo->FileName, conv_name, conv_len);
+ fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
+ break;
+ }
+ case FILEID_FULL_DIRECTORY_INFORMATION:
+ {
+ struct file_id_full_dir_info *dinfo;
+
+ dinfo = (struct file_id_full_dir_info *)kstat;
+ dinfo->FileNameLength = cpu_to_le32(conv_len);
+ dinfo->EaSize =
+ smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
+ if (dinfo->EaSize)
+ dinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
+ dinfo->Reserved = 0;
+ dinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
+ if (d_info->hide_dot_file && d_info->name[0] == '.')
+ dinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
+ memcpy(dinfo->FileName, conv_name, conv_len);
+ dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
+ break;
+ }
+ case FILEID_BOTH_DIRECTORY_INFORMATION:
+ {
+ struct file_id_both_directory_info *fibdinfo;
+
+ fibdinfo = (struct file_id_both_directory_info *)kstat;
+ fibdinfo->FileNameLength = cpu_to_le32(conv_len);
+ fibdinfo->EaSize =
+ smb2_get_reparse_tag_special_file(ksmbd_kstat->kstat->mode);
+ if (fibdinfo->EaSize)
+ fibdinfo->ExtFileAttributes = FILE_ATTRIBUTE_REPARSE_POINT_LE;
+ fibdinfo->UniqueId = cpu_to_le64(ksmbd_kstat->kstat->ino);
+ fibdinfo->ShortNameLength = 0;
+ fibdinfo->Reserved = 0;
+ fibdinfo->Reserved2 = cpu_to_le16(0);
+ if (d_info->hide_dot_file && d_info->name[0] == '.')
+ fibdinfo->ExtFileAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
+ memcpy(fibdinfo->FileName, conv_name, conv_len);
+ fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
+ break;
+ }
+ case SMB_FIND_FILE_POSIX_INFO:
+ {
+ struct smb2_posix_info *posix_info;
+ u64 time;
+
+ posix_info = (struct smb2_posix_info *)kstat;
+ posix_info->Ignored = 0;
+ posix_info->CreationTime = cpu_to_le64(ksmbd_kstat->create_time);
+ time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->ctime);
+ posix_info->ChangeTime = cpu_to_le64(time);
+ time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->atime);
+ posix_info->LastAccessTime = cpu_to_le64(time);
+ time = ksmbd_UnixTimeToNT(ksmbd_kstat->kstat->mtime);
+ posix_info->LastWriteTime = cpu_to_le64(time);
+ posix_info->EndOfFile = cpu_to_le64(ksmbd_kstat->kstat->size);
+ posix_info->AllocationSize = cpu_to_le64(ksmbd_kstat->kstat->blocks << 9);
+ posix_info->DeviceId = cpu_to_le32(ksmbd_kstat->kstat->rdev);
+ posix_info->HardLinks = cpu_to_le32(ksmbd_kstat->kstat->nlink);
+ posix_info->Mode = cpu_to_le32(ksmbd_kstat->kstat->mode & 0777);
+ posix_info->Inode = cpu_to_le64(ksmbd_kstat->kstat->ino);
+ posix_info->DosAttributes =
+ S_ISDIR(ksmbd_kstat->kstat->mode) ?
+ FILE_ATTRIBUTE_DIRECTORY_LE : FILE_ATTRIBUTE_ARCHIVE_LE;
+ if (d_info->hide_dot_file && d_info->name[0] == '.')
+ posix_info->DosAttributes |= FILE_ATTRIBUTE_HIDDEN_LE;
+ /*
+ * SidBuffer(32) contain two sids(Domain sid(16), UNIX group sid(16)).
+ * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
+ * sub_auth(4 * 1(num_subauth)) + RID(4).
+ */
+ id_to_sid(from_kuid_munged(&init_user_ns, ksmbd_kstat->kstat->uid),
+ SIDUNIX_USER, (struct smb_sid *)&posix_info->SidBuffer[0]);
+ id_to_sid(from_kgid_munged(&init_user_ns, ksmbd_kstat->kstat->gid),
+ SIDUNIX_GROUP, (struct smb_sid *)&posix_info->SidBuffer[16]);
+ memcpy(posix_info->name, conv_name, conv_len);
+ posix_info->name_len = cpu_to_le32(conv_len);
+ posix_info->NextEntryOffset = cpu_to_le32(next_entry_offset);
+ break;
+ }
+
+ } /* switch (info_level) */
+
+ d_info->last_entry_offset = d_info->data_count;
+ d_info->data_count += next_entry_offset;
+ d_info->out_buf_len -= next_entry_offset;
+ d_info->wptr += next_entry_offset;
+
+ ksmbd_debug(SMB,
+ "info_level : %d, buf_len :%d, next_offset : %d, data_count : %d\n",
+ info_level, d_info->out_buf_len,
+ next_entry_offset, d_info->data_count);
+
+free_conv_name:
+ kfree(conv_name);
+ return rc;
+}
+
+struct smb2_query_dir_private {
+ struct ksmbd_work *work;
+ char *search_pattern;
+ struct ksmbd_file *dir_fp;
+
+ struct ksmbd_dir_info *d_info;
+ int info_level;
+};
+
+static void lock_dir(struct ksmbd_file *dir_fp)
+{
+ struct dentry *dir = dir_fp->filp->f_path.dentry;
+
+ inode_lock_nested(d_inode(dir), I_MUTEX_PARENT);
+}
+
+static void unlock_dir(struct ksmbd_file *dir_fp)
+{
+ struct dentry *dir = dir_fp->filp->f_path.dentry;
+
+ inode_unlock(d_inode(dir));
+}
+
+static int process_query_dir_entries(struct smb2_query_dir_private *priv)
+{
+ struct mnt_idmap *idmap = file_mnt_idmap(priv->dir_fp->filp);
+ struct kstat kstat;
+ struct ksmbd_kstat ksmbd_kstat;
+ int rc;
+ int i;
+
+ for (i = 0; i < priv->d_info->num_entry; i++) {
+ struct dentry *dent;
+
+ if (dentry_name(priv->d_info, priv->info_level))
+ return -EINVAL;
+
+ lock_dir(priv->dir_fp);
+ dent = lookup_one(idmap, priv->d_info->name,
+ priv->dir_fp->filp->f_path.dentry,
+ priv->d_info->name_len);
+ unlock_dir(priv->dir_fp);
+
+ if (IS_ERR(dent)) {
+ ksmbd_debug(SMB, "Cannot lookup `%s' [%ld]\n",
+ priv->d_info->name,
+ PTR_ERR(dent));
+ continue;
+ }
+ if (unlikely(d_is_negative(dent))) {
+ dput(dent);
+ ksmbd_debug(SMB, "Negative dentry `%s'\n",
+ priv->d_info->name);
+ continue;
+ }
+
+ ksmbd_kstat.kstat = &kstat;
+ if (priv->info_level != FILE_NAMES_INFORMATION)
+ ksmbd_vfs_fill_dentry_attrs(priv->work,
+ idmap,
+ dent,
+ &ksmbd_kstat);
+
+ rc = smb2_populate_readdir_entry(priv->work->conn,
+ priv->info_level,
+ priv->d_info,
+ &ksmbd_kstat);
+ dput(dent);
+ if (rc)
+ return rc;
+ }
+ return 0;
+}
+
+static int reserve_populate_dentry(struct ksmbd_dir_info *d_info,
+ int info_level)
+{
+ int struct_sz;
+ int conv_len;
+ int next_entry_offset;
+
+ struct_sz = readdir_info_level_struct_sz(info_level);
+ if (struct_sz == -EOPNOTSUPP)
+ return -EOPNOTSUPP;
+
+ conv_len = (d_info->name_len + 1) * 2;
+ next_entry_offset = ALIGN(struct_sz + conv_len,
+ KSMBD_DIR_INFO_ALIGNMENT);
+
+ if (next_entry_offset > d_info->out_buf_len) {
+ d_info->out_buf_len = 0;
+ return -ENOSPC;
+ }
+
+ switch (info_level) {
+ case FILE_FULL_DIRECTORY_INFORMATION:
+ {
+ struct file_full_directory_info *ffdinfo;
+
+ ffdinfo = (struct file_full_directory_info *)d_info->wptr;
+ memcpy(ffdinfo->FileName, d_info->name, d_info->name_len);
+ ffdinfo->FileName[d_info->name_len] = 0x00;
+ ffdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
+ ffdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
+ break;
+ }
+ case FILE_BOTH_DIRECTORY_INFORMATION:
+ {
+ struct file_both_directory_info *fbdinfo;
+
+ fbdinfo = (struct file_both_directory_info *)d_info->wptr;
+ memcpy(fbdinfo->FileName, d_info->name, d_info->name_len);
+ fbdinfo->FileName[d_info->name_len] = 0x00;
+ fbdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
+ fbdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
+ break;
+ }
+ case FILE_DIRECTORY_INFORMATION:
+ {
+ struct file_directory_info *fdinfo;
+
+ fdinfo = (struct file_directory_info *)d_info->wptr;
+ memcpy(fdinfo->FileName, d_info->name, d_info->name_len);
+ fdinfo->FileName[d_info->name_len] = 0x00;
+ fdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
+ fdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
+ break;
+ }
+ case FILE_NAMES_INFORMATION:
+ {
+ struct file_names_info *fninfo;
+
+ fninfo = (struct file_names_info *)d_info->wptr;
+ memcpy(fninfo->FileName, d_info->name, d_info->name_len);
+ fninfo->FileName[d_info->name_len] = 0x00;
+ fninfo->FileNameLength = cpu_to_le32(d_info->name_len);
+ fninfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
+ break;
+ }
+ case FILEID_FULL_DIRECTORY_INFORMATION:
+ {
+ struct file_id_full_dir_info *dinfo;
+
+ dinfo = (struct file_id_full_dir_info *)d_info->wptr;
+ memcpy(dinfo->FileName, d_info->name, d_info->name_len);
+ dinfo->FileName[d_info->name_len] = 0x00;
+ dinfo->FileNameLength = cpu_to_le32(d_info->name_len);
+ dinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
+ break;
+ }
+ case FILEID_BOTH_DIRECTORY_INFORMATION:
+ {
+ struct file_id_both_directory_info *fibdinfo;
+
+ fibdinfo = (struct file_id_both_directory_info *)d_info->wptr;
+ memcpy(fibdinfo->FileName, d_info->name, d_info->name_len);
+ fibdinfo->FileName[d_info->name_len] = 0x00;
+ fibdinfo->FileNameLength = cpu_to_le32(d_info->name_len);
+ fibdinfo->NextEntryOffset = cpu_to_le32(next_entry_offset);
+ break;
+ }
+ case SMB_FIND_FILE_POSIX_INFO:
+ {
+ struct smb2_posix_info *posix_info;
+
+ posix_info = (struct smb2_posix_info *)d_info->wptr;
+ memcpy(posix_info->name, d_info->name, d_info->name_len);
+ posix_info->name[d_info->name_len] = 0x00;
+ posix_info->name_len = cpu_to_le32(d_info->name_len);
+ posix_info->NextEntryOffset =
+ cpu_to_le32(next_entry_offset);
+ break;
+ }
+ } /* switch (info_level) */
+
+ d_info->num_entry++;
+ d_info->out_buf_len -= next_entry_offset;
+ d_info->wptr += next_entry_offset;
+ return 0;
+}
+
+static bool __query_dir(struct dir_context *ctx, const char *name, int namlen,
+ loff_t offset, u64 ino, unsigned int d_type)
+{
+ struct ksmbd_readdir_data *buf;
+ struct smb2_query_dir_private *priv;
+ struct ksmbd_dir_info *d_info;
+ int rc;
+
+ buf = container_of(ctx, struct ksmbd_readdir_data, ctx);
+ priv = buf->private;
+ d_info = priv->d_info;
+
+ /* dot and dotdot entries are already reserved */
+ if (!strcmp(".", name) || !strcmp("..", name))
+ return true;
+ if (ksmbd_share_veto_filename(priv->work->tcon->share_conf, name))
+ return true;
+ if (!match_pattern(name, namlen, priv->search_pattern))
+ return true;
+
+ d_info->name = name;
+ d_info->name_len = namlen;
+ rc = reserve_populate_dentry(d_info, priv->info_level);
+ if (rc)
+ return false;
+ if (d_info->flags & SMB2_RETURN_SINGLE_ENTRY)
+ d_info->out_buf_len = 0;
+ return true;
+}
+
+static int verify_info_level(int info_level)
+{
+ switch (info_level) {
+ case FILE_FULL_DIRECTORY_INFORMATION:
+ case FILE_BOTH_DIRECTORY_INFORMATION:
+ case FILE_DIRECTORY_INFORMATION:
+ case FILE_NAMES_INFORMATION:
+ case FILEID_FULL_DIRECTORY_INFORMATION:
+ case FILEID_BOTH_DIRECTORY_INFORMATION:
+ case SMB_FIND_FILE_POSIX_INFO:
+ break;
+ default:
+ return -EOPNOTSUPP;
+ }
+
+ return 0;
+}
+
+static int smb2_resp_buf_len(struct ksmbd_work *work, unsigned short hdr2_len)
+{
+ int free_len;
+
+ free_len = (int)(work->response_sz -
+ (get_rfc1002_len(work->response_buf) + 4)) - hdr2_len;
+ return free_len;
+}
+
+static int smb2_calc_max_out_buf_len(struct ksmbd_work *work,
+ unsigned short hdr2_len,
+ unsigned int out_buf_len)
+{
+ int free_len;
+
+ if (out_buf_len > work->conn->vals->max_trans_size)
+ return -EINVAL;
+
+ free_len = smb2_resp_buf_len(work, hdr2_len);
+ if (free_len < 0)
+ return -EINVAL;
+
+ return min_t(int, out_buf_len, free_len);
+}
+
+int smb2_query_dir(struct ksmbd_work *work)
+{
+ struct ksmbd_conn *conn = work->conn;
+ struct smb2_query_directory_req *req;
+ struct smb2_query_directory_rsp *rsp;
+ struct ksmbd_share_config *share = work->tcon->share_conf;
+ struct ksmbd_file *dir_fp = NULL;
+ struct ksmbd_dir_info d_info;
+ int rc = 0;
+ char *srch_ptr = NULL;
+ unsigned char srch_flag;
+ int buffer_sz;
+ struct smb2_query_dir_private query_dir_private = {NULL, };
+
+ WORK_BUFFERS(work, req, rsp);
+
+ if (ksmbd_override_fsids(work)) {
+ rsp->hdr.Status = STATUS_NO_MEMORY;
+ smb2_set_err_rsp(work);
+ return -ENOMEM;
+ }
+
+ rc = verify_info_level(req->FileInformationClass);
+ if (rc) {
+ rc = -EFAULT;
+ goto err_out2;
+ }
+
+ dir_fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
+ if (!dir_fp) {
+ rc = -EBADF;
+ goto err_out2;
+ }
+
+ if (!(dir_fp->daccess & FILE_LIST_DIRECTORY_LE) ||
+ inode_permission(file_mnt_idmap(dir_fp->filp),
+ file_inode(dir_fp->filp),
+ MAY_READ | MAY_EXEC)) {
+ pr_err("no right to enumerate directory (%pD)\n", dir_fp->filp);
+ rc = -EACCES;
+ goto err_out2;
+ }
+
+ if (!S_ISDIR(file_inode(dir_fp->filp)->i_mode)) {
+ pr_err("can't do query dir for a file\n");
+ rc = -EINVAL;
+ goto err_out2;
+ }
+
+ srch_flag = req->Flags;
+ srch_ptr = smb_strndup_from_utf16(req->Buffer,
+ le16_to_cpu(req->FileNameLength), 1,
+ conn->local_nls);
+ if (IS_ERR(srch_ptr)) {
+ ksmbd_debug(SMB, "Search Pattern not found\n");
+ rc = -EINVAL;
+ goto err_out2;
+ } else {
+ ksmbd_debug(SMB, "Search pattern is %s\n", srch_ptr);
+ }
+
+ if (srch_flag & SMB2_REOPEN || srch_flag & SMB2_RESTART_SCANS) {
+ ksmbd_debug(SMB, "Restart directory scan\n");
+ generic_file_llseek(dir_fp->filp, 0, SEEK_SET);
+ }
+
+ memset(&d_info, 0, sizeof(struct ksmbd_dir_info));
+ d_info.wptr = (char *)rsp->Buffer;
+ d_info.rptr = (char *)rsp->Buffer;
+ d_info.out_buf_len =
+ smb2_calc_max_out_buf_len(work, 8,
+ le32_to_cpu(req->OutputBufferLength));
+ if (d_info.out_buf_len < 0) {
+ rc = -EINVAL;
+ goto err_out;
+ }
+ d_info.flags = srch_flag;
+
+ /*
+ * reserve dot and dotdot entries in head of buffer
+ * in first response
+ */
+ rc = ksmbd_populate_dot_dotdot_entries(work, req->FileInformationClass,
+ dir_fp, &d_info, srch_ptr,
+ smb2_populate_readdir_entry);
+ if (rc == -ENOSPC)
+ rc = 0;
+ else if (rc)
+ goto err_out;
+
+ if (test_share_config_flag(share, KSMBD_SHARE_FLAG_HIDE_DOT_FILES))
+ d_info.hide_dot_file = true;
+
+ buffer_sz = d_info.out_buf_len;
+ d_info.rptr = d_info.wptr;
+ query_dir_private.work = work;
+ query_dir_private.search_pattern = srch_ptr;
+ query_dir_private.dir_fp = dir_fp;
+ query_dir_private.d_info = &d_info;
+ query_dir_private.info_level = req->FileInformationClass;
+ dir_fp->readdir_data.private = &query_dir_private;
+ set_ctx_actor(&dir_fp->readdir_data.ctx, __query_dir);
+
+ rc = iterate_dir(dir_fp->filp, &dir_fp->readdir_data.ctx);
+ /*
+ * req->OutputBufferLength is too small to contain even one entry.
+ * In this case, it immediately returns OutputBufferLength 0 to client.
+ */
+ if (!d_info.out_buf_len && !d_info.num_entry)
+ goto no_buf_len;
+ if (rc > 0 || rc == -ENOSPC)
+ rc = 0;
+ else if (rc)
+ goto err_out;
+
+ d_info.wptr = d_info.rptr;
+ d_info.out_buf_len = buffer_sz;
+ rc = process_query_dir_entries(&query_dir_private);
+ if (rc)
+ goto err_out;
+
+ if (!d_info.data_count && d_info.out_buf_len >= 0) {
+ if (srch_flag & SMB2_RETURN_SINGLE_ENTRY && !is_asterisk(srch_ptr)) {
+ rsp->hdr.Status = STATUS_NO_SUCH_FILE;
+ } else {
+ dir_fp->dot_dotdot[0] = dir_fp->dot_dotdot[1] = 0;
+ rsp->hdr.Status = STATUS_NO_MORE_FILES;
+ }
+ rsp->StructureSize = cpu_to_le16(9);
+ rsp->OutputBufferOffset = cpu_to_le16(0);
+ rsp->OutputBufferLength = cpu_to_le32(0);
+ rsp->Buffer[0] = 0;
+ rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
+ sizeof(struct smb2_query_directory_rsp));
+ if (rc)
+ goto err_out;
+ } else {
+no_buf_len:
+ ((struct file_directory_info *)
+ ((char *)rsp->Buffer + d_info.last_entry_offset))
+ ->NextEntryOffset = 0;
+ if (d_info.data_count >= d_info.last_entry_off_align)
+ d_info.data_count -= d_info.last_entry_off_align;
+
+ rsp->StructureSize = cpu_to_le16(9);
+ rsp->OutputBufferOffset = cpu_to_le16(72);
+ rsp->OutputBufferLength = cpu_to_le32(d_info.data_count);
+ rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
+ offsetof(struct smb2_query_directory_rsp, Buffer) +
+ d_info.data_count);
+ if (rc)
+ goto err_out;
+ }
+
+ kfree(srch_ptr);
+ ksmbd_fd_put(work, dir_fp);
+ ksmbd_revert_fsids(work);
+ return 0;
+
+err_out:
+ pr_err("error while processing smb2 query dir rc = %d\n", rc);
+ kfree(srch_ptr);
+
+err_out2:
+ if (rc == -EINVAL)
+ rsp->hdr.Status = STATUS_INVALID_PARAMETER;
+ else if (rc == -EACCES)
+ rsp->hdr.Status = STATUS_ACCESS_DENIED;
+ else if (rc == -ENOENT)
+ rsp->hdr.Status = STATUS_NO_SUCH_FILE;
+ else if (rc == -EBADF)
+ rsp->hdr.Status = STATUS_FILE_CLOSED;
+ else if (rc == -ENOMEM)
+ rsp->hdr.Status = STATUS_NO_MEMORY;
+ else if (rc == -EFAULT)
+ rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
+ else if (rc == -EIO)
+ rsp->hdr.Status = STATUS_FILE_CORRUPT_ERROR;
+ if (!rsp->hdr.Status)
+ rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
+
+ smb2_set_err_rsp(work);
+ ksmbd_fd_put(work, dir_fp);
+ ksmbd_revert_fsids(work);
+ return 0;
+}
+
+/**
+ * buffer_check_err() - helper function to check buffer errors
+ * @reqOutputBufferLength: max buffer length expected in command response
+ * @rsp: query info response buffer contains output buffer length
+ * @rsp_org: base response buffer pointer in case of chained response
+ *
+ * Return: 0 on success, otherwise error
+ */
+static int buffer_check_err(int reqOutputBufferLength,
+ struct smb2_query_info_rsp *rsp,
+ void *rsp_org)
+{
+ if (reqOutputBufferLength < le32_to_cpu(rsp->OutputBufferLength)) {
+ pr_err("Invalid Buffer Size Requested\n");
+ rsp->hdr.Status = STATUS_INFO_LENGTH_MISMATCH;
+ *(__be32 *)rsp_org = cpu_to_be32(sizeof(struct smb2_hdr));
+ return -EINVAL;
+ }
+ return 0;
+}
+
+static void get_standard_info_pipe(struct smb2_query_info_rsp *rsp,
+ void *rsp_org)
+{
+ struct smb2_file_standard_info *sinfo;
+
+ sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
+
+ sinfo->AllocationSize = cpu_to_le64(4096);
+ sinfo->EndOfFile = cpu_to_le64(0);
+ sinfo->NumberOfLinks = cpu_to_le32(1);
+ sinfo->DeletePending = 1;
+ sinfo->Directory = 0;
+ rsp->OutputBufferLength =
+ cpu_to_le32(sizeof(struct smb2_file_standard_info));
+}
+
+static void get_internal_info_pipe(struct smb2_query_info_rsp *rsp, u64 num,
+ void *rsp_org)
+{
+ struct smb2_file_internal_info *file_info;
+
+ file_info = (struct smb2_file_internal_info *)rsp->Buffer;
+
+ /* any unique number */
+ file_info->IndexNumber = cpu_to_le64(num | (1ULL << 63));
+ rsp->OutputBufferLength =
+ cpu_to_le32(sizeof(struct smb2_file_internal_info));
+}
+
+static int smb2_get_info_file_pipe(struct ksmbd_session *sess,
+ struct smb2_query_info_req *req,
+ struct smb2_query_info_rsp *rsp,
+ void *rsp_org)
+{
+ u64 id;
+ int rc;
+
+ /*
+ * Windows can sometime send query file info request on
+ * pipe without opening it, checking error condition here
+ */
+ id = req->VolatileFileId;
+ if (!ksmbd_session_rpc_method(sess, id))
+ return -ENOENT;
+
+ ksmbd_debug(SMB, "FileInfoClass %u, FileId 0x%llx\n",
+ req->FileInfoClass, req->VolatileFileId);
+
+ switch (req->FileInfoClass) {
+ case FILE_STANDARD_INFORMATION:
+ get_standard_info_pipe(rsp, rsp_org);
+ rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
+ rsp, rsp_org);
+ break;
+ case FILE_INTERNAL_INFORMATION:
+ get_internal_info_pipe(rsp, id, rsp_org);
+ rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
+ rsp, rsp_org);
+ break;
+ default:
+ ksmbd_debug(SMB, "smb2_info_file_pipe for %u not supported\n",
+ req->FileInfoClass);
+ rc = -EOPNOTSUPP;
+ }
+ return rc;
+}
+
+/**
+ * smb2_get_ea() - handler for smb2 get extended attribute command
+ * @work: smb work containing query info command buffer
+ * @fp: ksmbd_file pointer
+ * @req: get extended attribute request
+ * @rsp: response buffer pointer
+ * @rsp_org: base response buffer pointer in case of chained response
+ *
+ * Return: 0 on success, otherwise error
+ */
+static int smb2_get_ea(struct ksmbd_work *work, struct ksmbd_file *fp,
+ struct smb2_query_info_req *req,
+ struct smb2_query_info_rsp *rsp, void *rsp_org)
+{
+ struct smb2_ea_info *eainfo, *prev_eainfo;
+ char *name, *ptr, *xattr_list = NULL, *buf;
+ int rc, name_len, value_len, xattr_list_len, idx;
+ ssize_t buf_free_len, alignment_bytes, next_offset, rsp_data_cnt = 0;
+ struct smb2_ea_info_req *ea_req = NULL;
+ const struct path *path;
+ struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
+
+ if (!(fp->daccess & FILE_READ_EA_LE)) {
+ pr_err("Not permitted to read ext attr : 0x%x\n",
+ fp->daccess);
+ return -EACCES;
+ }
+
+ path = &fp->filp->f_path;
+ /* single EA entry is requested with given user.* name */
+ if (req->InputBufferLength) {
+ if (le32_to_cpu(req->InputBufferLength) <
+ sizeof(struct smb2_ea_info_req))
+ return -EINVAL;
+
+ ea_req = (struct smb2_ea_info_req *)req->Buffer;
+ } else {
+ /* need to send all EAs, if no specific EA is requested*/
+ if (le32_to_cpu(req->Flags) & SL_RETURN_SINGLE_ENTRY)
+ ksmbd_debug(SMB,
+ "All EAs are requested but need to send single EA entry in rsp flags 0x%x\n",
+ le32_to_cpu(req->Flags));
+ }
+
+ buf_free_len =
+ smb2_calc_max_out_buf_len(work, 8,
+ le32_to_cpu(req->OutputBufferLength));
+ if (buf_free_len < 0)
+ return -EINVAL;
+
+ rc = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
+ if (rc < 0) {
+ rsp->hdr.Status = STATUS_INVALID_HANDLE;
+ goto out;
+ } else if (!rc) { /* there is no EA in the file */
+ ksmbd_debug(SMB, "no ea data in the file\n");
+ goto done;
+ }
+ xattr_list_len = rc;
+
+ ptr = (char *)rsp->Buffer;
+ eainfo = (struct smb2_ea_info *)ptr;
+ prev_eainfo = eainfo;
+ idx = 0;
+
+ while (idx < xattr_list_len) {
+ name = xattr_list + idx;
+ name_len = strlen(name);
+
+ ksmbd_debug(SMB, "%s, len %d\n", name, name_len);
+ idx += name_len + 1;
+
+ /*
+ * CIFS does not support EA other than user.* namespace,
+ * still keep the framework generic, to list other attrs
+ * in future.
+ */
+ if (strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
+ continue;
+
+ if (!strncmp(&name[XATTR_USER_PREFIX_LEN], STREAM_PREFIX,
+ STREAM_PREFIX_LEN))
+ continue;
+
+ if (req->InputBufferLength &&
+ strncmp(&name[XATTR_USER_PREFIX_LEN], ea_req->name,
+ ea_req->EaNameLength))
+ continue;
+
+ if (!strncmp(&name[XATTR_USER_PREFIX_LEN],
+ DOS_ATTRIBUTE_PREFIX, DOS_ATTRIBUTE_PREFIX_LEN))
+ continue;
+
+ if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
+ name_len -= XATTR_USER_PREFIX_LEN;
+
+ ptr = eainfo->name + name_len + 1;
+ buf_free_len -= (offsetof(struct smb2_ea_info, name) +
+ name_len + 1);
+ /* bailout if xattr can't fit in buf_free_len */
+ value_len = ksmbd_vfs_getxattr(idmap, path->dentry,
+ name, &buf);
+ if (value_len <= 0) {
+ rc = -ENOENT;
+ rsp->hdr.Status = STATUS_INVALID_HANDLE;
+ goto out;
+ }
+
+ buf_free_len -= value_len;
+ if (buf_free_len < 0) {
+ kfree(buf);
+ break;
+ }
+
+ memcpy(ptr, buf, value_len);
+ kfree(buf);
+
+ ptr += value_len;
+ eainfo->Flags = 0;
+ eainfo->EaNameLength = name_len;
+
+ if (!strncmp(name, XATTR_USER_PREFIX, XATTR_USER_PREFIX_LEN))
+ memcpy(eainfo->name, &name[XATTR_USER_PREFIX_LEN],
+ name_len);
+ else
+ memcpy(eainfo->name, name, name_len);
+
+ eainfo->name[name_len] = '\0';
+ eainfo->EaValueLength = cpu_to_le16(value_len);
+ next_offset = offsetof(struct smb2_ea_info, name) +
+ name_len + 1 + value_len;
+
+ /* align next xattr entry at 4 byte bundary */
+ alignment_bytes = ((next_offset + 3) & ~3) - next_offset;
+ if (alignment_bytes) {
+ memset(ptr, '\0', alignment_bytes);
+ ptr += alignment_bytes;
+ next_offset += alignment_bytes;
+ buf_free_len -= alignment_bytes;
+ }
+ eainfo->NextEntryOffset = cpu_to_le32(next_offset);
+ prev_eainfo = eainfo;
+ eainfo = (struct smb2_ea_info *)ptr;
+ rsp_data_cnt += next_offset;
+
+ if (req->InputBufferLength) {
+ ksmbd_debug(SMB, "single entry requested\n");
+ break;
+ }
+ }
+
+ /* no more ea entries */
+ prev_eainfo->NextEntryOffset = 0;
+done:
+ rc = 0;
+ if (rsp_data_cnt == 0)
+ rsp->hdr.Status = STATUS_NO_EAS_ON_FILE;
+ rsp->OutputBufferLength = cpu_to_le32(rsp_data_cnt);
+out:
+ kvfree(xattr_list);
+ return rc;
+}
+
+static void get_file_access_info(struct smb2_query_info_rsp *rsp,
+ struct ksmbd_file *fp, void *rsp_org)
+{
+ struct smb2_file_access_info *file_info;
+
+ file_info = (struct smb2_file_access_info *)rsp->Buffer;
+ file_info->AccessFlags = fp->daccess;
+ rsp->OutputBufferLength =
+ cpu_to_le32(sizeof(struct smb2_file_access_info));
+}
+
+static int get_file_basic_info(struct smb2_query_info_rsp *rsp,
+ struct ksmbd_file *fp, void *rsp_org)
+{
+ struct smb2_file_basic_info *basic_info;
+ struct kstat stat;
+ u64 time;
+
+ if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
+ pr_err("no right to read the attributes : 0x%x\n",
+ fp->daccess);
+ return -EACCES;
+ }
+
+ basic_info = (struct smb2_file_basic_info *)rsp->Buffer;
+ generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS,
+ file_inode(fp->filp), &stat);
+ basic_info->CreationTime = cpu_to_le64(fp->create_time);
+ time = ksmbd_UnixTimeToNT(stat.atime);
+ basic_info->LastAccessTime = cpu_to_le64(time);
+ time = ksmbd_UnixTimeToNT(stat.mtime);
+ basic_info->LastWriteTime = cpu_to_le64(time);
+ time = ksmbd_UnixTimeToNT(stat.ctime);
+ basic_info->ChangeTime = cpu_to_le64(time);
+ basic_info->Attributes = fp->f_ci->m_fattr;
+ basic_info->Pad1 = 0;
+ rsp->OutputBufferLength =
+ cpu_to_le32(sizeof(struct smb2_file_basic_info));
+ return 0;
+}
+
+static void get_file_standard_info(struct smb2_query_info_rsp *rsp,
+ struct ksmbd_file *fp, void *rsp_org)
+{
+ struct smb2_file_standard_info *sinfo;
+ unsigned int delete_pending;
+ struct inode *inode;
+ struct kstat stat;
+
+ inode = file_inode(fp->filp);
+ generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS, inode, &stat);
+
+ sinfo = (struct smb2_file_standard_info *)rsp->Buffer;
+ delete_pending = ksmbd_inode_pending_delete(fp);
+
+ sinfo->AllocationSize = cpu_to_le64(inode->i_blocks << 9);
+ sinfo->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
+ sinfo->NumberOfLinks = cpu_to_le32(get_nlink(&stat) - delete_pending);
+ sinfo->DeletePending = delete_pending;
+ sinfo->Directory = S_ISDIR(stat.mode) ? 1 : 0;
+ rsp->OutputBufferLength =
+ cpu_to_le32(sizeof(struct smb2_file_standard_info));
+}
+
+static void get_file_alignment_info(struct smb2_query_info_rsp *rsp,
+ void *rsp_org)
+{
+ struct smb2_file_alignment_info *file_info;
+
+ file_info = (struct smb2_file_alignment_info *)rsp->Buffer;
+ file_info->AlignmentRequirement = 0;
+ rsp->OutputBufferLength =
+ cpu_to_le32(sizeof(struct smb2_file_alignment_info));
+}
+
+static int get_file_all_info(struct ksmbd_work *work,
+ struct smb2_query_info_rsp *rsp,
+ struct ksmbd_file *fp,
+ void *rsp_org)
+{
+ struct ksmbd_conn *conn = work->conn;
+ struct smb2_file_all_info *file_info;
+ unsigned int delete_pending;
+ struct inode *inode;
+ struct kstat stat;
+ int conv_len;
+ char *filename;
+ u64 time;
+
+ if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
+ ksmbd_debug(SMB, "no right to read the attributes : 0x%x\n",
+ fp->daccess);
+ return -EACCES;
+ }
+
+ filename = convert_to_nt_pathname(work->tcon->share_conf, &fp->filp->f_path);
+ if (IS_ERR(filename))
+ return PTR_ERR(filename);
+
+ inode = file_inode(fp->filp);
+ generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS, inode, &stat);
+
+ ksmbd_debug(SMB, "filename = %s\n", filename);
+ delete_pending = ksmbd_inode_pending_delete(fp);
+ file_info = (struct smb2_file_all_info *)rsp->Buffer;
+
+ file_info->CreationTime = cpu_to_le64(fp->create_time);
+ time = ksmbd_UnixTimeToNT(stat.atime);
+ file_info->LastAccessTime = cpu_to_le64(time);
+ time = ksmbd_UnixTimeToNT(stat.mtime);
+ file_info->LastWriteTime = cpu_to_le64(time);
+ time = ksmbd_UnixTimeToNT(stat.ctime);
+ file_info->ChangeTime = cpu_to_le64(time);
+ file_info->Attributes = fp->f_ci->m_fattr;
+ file_info->Pad1 = 0;
+ file_info->AllocationSize =
+ cpu_to_le64(inode->i_blocks << 9);
+ file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
+ file_info->NumberOfLinks =
+ cpu_to_le32(get_nlink(&stat) - delete_pending);
+ file_info->DeletePending = delete_pending;
+ file_info->Directory = S_ISDIR(stat.mode) ? 1 : 0;
+ file_info->Pad2 = 0;
+ file_info->IndexNumber = cpu_to_le64(stat.ino);
+ file_info->EASize = 0;
+ file_info->AccessFlags = fp->daccess;
+ file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
+ file_info->Mode = fp->coption;
+ file_info->AlignmentRequirement = 0;
+ conv_len = smbConvertToUTF16((__le16 *)file_info->FileName, filename,
+ PATH_MAX, conn->local_nls, 0);
+ conv_len *= 2;
+ file_info->FileNameLength = cpu_to_le32(conv_len);
+ rsp->OutputBufferLength =
+ cpu_to_le32(sizeof(struct smb2_file_all_info) + conv_len - 1);
+ kfree(filename);
+ return 0;
+}
+
+static void get_file_alternate_info(struct ksmbd_work *work,
+ struct smb2_query_info_rsp *rsp,
+ struct ksmbd_file *fp,
+ void *rsp_org)
+{
+ struct ksmbd_conn *conn = work->conn;
+ struct smb2_file_alt_name_info *file_info;
+ struct dentry *dentry = fp->filp->f_path.dentry;
+ int conv_len;
+
+ spin_lock(&dentry->d_lock);
+ file_info = (struct smb2_file_alt_name_info *)rsp->Buffer;
+ conv_len = ksmbd_extract_shortname(conn,
+ dentry->d_name.name,
+ file_info->FileName);
+ spin_unlock(&dentry->d_lock);
+ file_info->FileNameLength = cpu_to_le32(conv_len);
+ rsp->OutputBufferLength =
+ cpu_to_le32(sizeof(struct smb2_file_alt_name_info) + conv_len);
+}
+
+static void get_file_stream_info(struct ksmbd_work *work,
+ struct smb2_query_info_rsp *rsp,
+ struct ksmbd_file *fp,
+ void *rsp_org)
+{
+ struct ksmbd_conn *conn = work->conn;
+ struct smb2_file_stream_info *file_info;
+ char *stream_name, *xattr_list = NULL, *stream_buf;
+ struct kstat stat;
+ const struct path *path = &fp->filp->f_path;
+ ssize_t xattr_list_len;
+ int nbytes = 0, streamlen, stream_name_len, next, idx = 0;
+ int buf_free_len;
+ struct smb2_query_info_req *req = ksmbd_req_buf_next(work);
+
+ generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS,
+ file_inode(fp->filp), &stat);
+ file_info = (struct smb2_file_stream_info *)rsp->Buffer;
+
+ buf_free_len =
+ smb2_calc_max_out_buf_len(work, 8,
+ le32_to_cpu(req->OutputBufferLength));
+ if (buf_free_len < 0)
+ goto out;
+
+ xattr_list_len = ksmbd_vfs_listxattr(path->dentry, &xattr_list);
+ if (xattr_list_len < 0) {
+ goto out;
+ } else if (!xattr_list_len) {
+ ksmbd_debug(SMB, "empty xattr in the file\n");
+ goto out;
+ }
+
+ while (idx < xattr_list_len) {
+ stream_name = xattr_list + idx;
+ streamlen = strlen(stream_name);
+ idx += streamlen + 1;
+
+ ksmbd_debug(SMB, "%s, len %d\n", stream_name, streamlen);
+
+ if (strncmp(&stream_name[XATTR_USER_PREFIX_LEN],
+ STREAM_PREFIX, STREAM_PREFIX_LEN))
+ continue;
+
+ stream_name_len = streamlen - (XATTR_USER_PREFIX_LEN +
+ STREAM_PREFIX_LEN);
+ streamlen = stream_name_len;
+
+ /* plus : size */
+ streamlen += 1;
+ stream_buf = kmalloc(streamlen + 1, GFP_KERNEL);
+ if (!stream_buf)
+ break;
+
+ streamlen = snprintf(stream_buf, streamlen + 1,
+ ":%s", &stream_name[XATTR_NAME_STREAM_LEN]);
+
+ next = sizeof(struct smb2_file_stream_info) + streamlen * 2;
+ if (next > buf_free_len) {
+ kfree(stream_buf);
+ break;
+ }
+
+ file_info = (struct smb2_file_stream_info *)&rsp->Buffer[nbytes];
+ streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
+ stream_buf, streamlen,
+ conn->local_nls, 0);
+ streamlen *= 2;
+ kfree(stream_buf);
+ file_info->StreamNameLength = cpu_to_le32(streamlen);
+ file_info->StreamSize = cpu_to_le64(stream_name_len);
+ file_info->StreamAllocationSize = cpu_to_le64(stream_name_len);
+
+ nbytes += next;
+ buf_free_len -= next;
+ file_info->NextEntryOffset = cpu_to_le32(next);
+ }
+
+out:
+ if (!S_ISDIR(stat.mode) &&
+ buf_free_len >= sizeof(struct smb2_file_stream_info) + 7 * 2) {
+ file_info = (struct smb2_file_stream_info *)
+ &rsp->Buffer[nbytes];
+ streamlen = smbConvertToUTF16((__le16 *)file_info->StreamName,
+ "::$DATA", 7, conn->local_nls, 0);
+ streamlen *= 2;
+ file_info->StreamNameLength = cpu_to_le32(streamlen);
+ file_info->StreamSize = cpu_to_le64(stat.size);
+ file_info->StreamAllocationSize = cpu_to_le64(stat.blocks << 9);
+ nbytes += sizeof(struct smb2_file_stream_info) + streamlen;
+ }
+
+ /* last entry offset should be 0 */
+ file_info->NextEntryOffset = 0;
+ kvfree(xattr_list);
+
+ rsp->OutputBufferLength = cpu_to_le32(nbytes);
+}
+
+static void get_file_internal_info(struct smb2_query_info_rsp *rsp,
+ struct ksmbd_file *fp, void *rsp_org)
+{
+ struct smb2_file_internal_info *file_info;
+ struct kstat stat;
+
+ generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS,
+ file_inode(fp->filp), &stat);
+ file_info = (struct smb2_file_internal_info *)rsp->Buffer;
+ file_info->IndexNumber = cpu_to_le64(stat.ino);
+ rsp->OutputBufferLength =
+ cpu_to_le32(sizeof(struct smb2_file_internal_info));
+}
+
+static int get_file_network_open_info(struct smb2_query_info_rsp *rsp,
+ struct ksmbd_file *fp, void *rsp_org)
+{
+ struct smb2_file_ntwrk_info *file_info;
+ struct inode *inode;
+ struct kstat stat;
+ u64 time;
+
+ if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
+ pr_err("no right to read the attributes : 0x%x\n",
+ fp->daccess);
+ return -EACCES;
+ }
+
+ file_info = (struct smb2_file_ntwrk_info *)rsp->Buffer;
+
+ inode = file_inode(fp->filp);
+ generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS, inode, &stat);
+
+ file_info->CreationTime = cpu_to_le64(fp->create_time);
+ time = ksmbd_UnixTimeToNT(stat.atime);
+ file_info->LastAccessTime = cpu_to_le64(time);
+ time = ksmbd_UnixTimeToNT(stat.mtime);
+ file_info->LastWriteTime = cpu_to_le64(time);
+ time = ksmbd_UnixTimeToNT(stat.ctime);
+ file_info->ChangeTime = cpu_to_le64(time);
+ file_info->Attributes = fp->f_ci->m_fattr;
+ file_info->AllocationSize =
+ cpu_to_le64(inode->i_blocks << 9);
+ file_info->EndOfFile = S_ISDIR(stat.mode) ? 0 : cpu_to_le64(stat.size);
+ file_info->Reserved = cpu_to_le32(0);
+ rsp->OutputBufferLength =
+ cpu_to_le32(sizeof(struct smb2_file_ntwrk_info));
+ return 0;
+}
+
+static void get_file_ea_info(struct smb2_query_info_rsp *rsp, void *rsp_org)
+{
+ struct smb2_file_ea_info *file_info;
+
+ file_info = (struct smb2_file_ea_info *)rsp->Buffer;
+ file_info->EASize = 0;
+ rsp->OutputBufferLength =
+ cpu_to_le32(sizeof(struct smb2_file_ea_info));
+}
+
+static void get_file_position_info(struct smb2_query_info_rsp *rsp,
+ struct ksmbd_file *fp, void *rsp_org)
+{
+ struct smb2_file_pos_info *file_info;
+
+ file_info = (struct smb2_file_pos_info *)rsp->Buffer;
+ file_info->CurrentByteOffset = cpu_to_le64(fp->filp->f_pos);
+ rsp->OutputBufferLength =
+ cpu_to_le32(sizeof(struct smb2_file_pos_info));
+}
+
+static void get_file_mode_info(struct smb2_query_info_rsp *rsp,
+ struct ksmbd_file *fp, void *rsp_org)
+{
+ struct smb2_file_mode_info *file_info;
+
+ file_info = (struct smb2_file_mode_info *)rsp->Buffer;
+ file_info->Mode = fp->coption & FILE_MODE_INFO_MASK;
+ rsp->OutputBufferLength =
+ cpu_to_le32(sizeof(struct smb2_file_mode_info));
+}
+
+static void get_file_compression_info(struct smb2_query_info_rsp *rsp,
+ struct ksmbd_file *fp, void *rsp_org)
+{
+ struct smb2_file_comp_info *file_info;
+ struct kstat stat;
+
+ generic_fillattr(file_mnt_idmap(fp->filp), STATX_BASIC_STATS,
+ file_inode(fp->filp), &stat);
+
+ file_info = (struct smb2_file_comp_info *)rsp->Buffer;
+ file_info->CompressedFileSize = cpu_to_le64(stat.blocks << 9);
+ file_info->CompressionFormat = COMPRESSION_FORMAT_NONE;
+ file_info->CompressionUnitShift = 0;
+ file_info->ChunkShift = 0;
+ file_info->ClusterShift = 0;
+ memset(&file_info->Reserved[0], 0, 3);
+
+ rsp->OutputBufferLength =
+ cpu_to_le32(sizeof(struct smb2_file_comp_info));
+}
+
+static int get_file_attribute_tag_info(struct smb2_query_info_rsp *rsp,
+ struct ksmbd_file *fp, void *rsp_org)
+{
+ struct smb2_file_attr_tag_info *file_info;
+
+ if (!(fp->daccess & FILE_READ_ATTRIBUTES_LE)) {
+ pr_err("no right to read the attributes : 0x%x\n",
+ fp->daccess);
+ return -EACCES;
+ }
+
+ file_info = (struct smb2_file_attr_tag_info *)rsp->Buffer;
+ file_info->FileAttributes = fp->f_ci->m_fattr;
+ file_info->ReparseTag = 0;
+ rsp->OutputBufferLength =
+ cpu_to_le32(sizeof(struct smb2_file_attr_tag_info));
+ return 0;
+}
+
+static void find_file_posix_info(struct smb2_query_info_rsp *rsp,
+ struct ksmbd_file *fp, void *rsp_org)
+{
+ struct smb311_posix_qinfo *file_info;
+ struct inode *inode = file_inode(fp->filp);
+ struct mnt_idmap *idmap = file_mnt_idmap(fp->filp);
+ vfsuid_t vfsuid = i_uid_into_vfsuid(idmap, inode);
+ vfsgid_t vfsgid = i_gid_into_vfsgid(idmap, inode);
+ u64 time;
+ int out_buf_len = sizeof(struct smb311_posix_qinfo) + 32;
+
+ file_info = (struct smb311_posix_qinfo *)rsp->Buffer;
+ file_info->CreationTime = cpu_to_le64(fp->create_time);
+ time = ksmbd_UnixTimeToNT(inode->i_atime);
+ file_info->LastAccessTime = cpu_to_le64(time);
+ time = ksmbd_UnixTimeToNT(inode->i_mtime);
+ file_info->LastWriteTime = cpu_to_le64(time);
+ time = ksmbd_UnixTimeToNT(inode_get_ctime(inode));
+ file_info->ChangeTime = cpu_to_le64(time);
+ file_info->DosAttributes = fp->f_ci->m_fattr;
+ file_info->Inode = cpu_to_le64(inode->i_ino);
+ file_info->EndOfFile = cpu_to_le64(inode->i_size);
+ file_info->AllocationSize = cpu_to_le64(inode->i_blocks << 9);
+ file_info->HardLinks = cpu_to_le32(inode->i_nlink);
+ file_info->Mode = cpu_to_le32(inode->i_mode & 0777);
+ file_info->DeviceId = cpu_to_le32(inode->i_rdev);
+
+ /*
+ * Sids(32) contain two sids(Domain sid(16), UNIX group sid(16)).
+ * UNIX sid(16) = revision(1) + num_subauth(1) + authority(6) +
+ * sub_auth(4 * 1(num_subauth)) + RID(4).
+ */
+ id_to_sid(from_kuid_munged(&init_user_ns, vfsuid_into_kuid(vfsuid)),
+ SIDUNIX_USER, (struct smb_sid *)&file_info->Sids[0]);
+ id_to_sid(from_kgid_munged(&init_user_ns, vfsgid_into_kgid(vfsgid)),
+ SIDUNIX_GROUP, (struct smb_sid *)&file_info->Sids[16]);
+
+ rsp->OutputBufferLength = cpu_to_le32(out_buf_len);
+}
+
+static int smb2_get_info_file(struct ksmbd_work *work,
+ struct smb2_query_info_req *req,
+ struct smb2_query_info_rsp *rsp)
+{
+ struct ksmbd_file *fp;
+ int fileinfoclass = 0;
+ int rc = 0;
+ unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
+
+ if (test_share_config_flag(work->tcon->share_conf,
+ KSMBD_SHARE_FLAG_PIPE)) {
+ /* smb2 info file called for pipe */
+ return smb2_get_info_file_pipe(work->sess, req, rsp,
+ work->response_buf);
+ }
+
+ if (work->next_smb2_rcv_hdr_off) {
+ if (!has_file_id(req->VolatileFileId)) {
+ ksmbd_debug(SMB, "Compound request set FID = %llu\n",
+ work->compound_fid);
+ id = work->compound_fid;
+ pid = work->compound_pfid;
+ }
+ }
+
+ if (!has_file_id(id)) {
+ id = req->VolatileFileId;
+ pid = req->PersistentFileId;
+ }
+
+ fp = ksmbd_lookup_fd_slow(work, id, pid);
+ if (!fp)
+ return -ENOENT;
+
+ fileinfoclass = req->FileInfoClass;
+
+ switch (fileinfoclass) {
+ case FILE_ACCESS_INFORMATION:
+ get_file_access_info(rsp, fp, work->response_buf);
+ break;
+
+ case FILE_BASIC_INFORMATION:
+ rc = get_file_basic_info(rsp, fp, work->response_buf);
+ break;
+
+ case FILE_STANDARD_INFORMATION:
+ get_file_standard_info(rsp, fp, work->response_buf);
+ break;
+
+ case FILE_ALIGNMENT_INFORMATION:
+ get_file_alignment_info(rsp, work->response_buf);
+ break;
+
+ case FILE_ALL_INFORMATION:
+ rc = get_file_all_info(work, rsp, fp, work->response_buf);
+ break;
+
+ case FILE_ALTERNATE_NAME_INFORMATION:
+ get_file_alternate_info(work, rsp, fp, work->response_buf);
+ break;
+
+ case FILE_STREAM_INFORMATION:
+ get_file_stream_info(work, rsp, fp, work->response_buf);
+ break;
+
+ case FILE_INTERNAL_INFORMATION:
+ get_file_internal_info(rsp, fp, work->response_buf);
+ break;
+
+ case FILE_NETWORK_OPEN_INFORMATION:
+ rc = get_file_network_open_info(rsp, fp, work->response_buf);
+ break;
+
+ case FILE_EA_INFORMATION:
+ get_file_ea_info(rsp, work->response_buf);
+ break;
+
+ case FILE_FULL_EA_INFORMATION:
+ rc = smb2_get_ea(work, fp, req, rsp, work->response_buf);
+ break;
+
+ case FILE_POSITION_INFORMATION:
+ get_file_position_info(rsp, fp, work->response_buf);
+ break;
+
+ case FILE_MODE_INFORMATION:
+ get_file_mode_info(rsp, fp, work->response_buf);
+ break;
+
+ case FILE_COMPRESSION_INFORMATION:
+ get_file_compression_info(rsp, fp, work->response_buf);
+ break;
+
+ case FILE_ATTRIBUTE_TAG_INFORMATION:
+ rc = get_file_attribute_tag_info(rsp, fp, work->response_buf);
+ break;
+ case SMB_FIND_FILE_POSIX_INFO:
+ if (!work->tcon->posix_extensions) {
+ pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
+ rc = -EOPNOTSUPP;
+ } else {
+ find_file_posix_info(rsp, fp, work->response_buf);
+ }
+ break;
+ default:
+ ksmbd_debug(SMB, "fileinfoclass %d not supported yet\n",
+ fileinfoclass);
+ rc = -EOPNOTSUPP;
+ }
+ if (!rc)
+ rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
+ rsp, work->response_buf);
+ ksmbd_fd_put(work, fp);
+ return rc;
+}
+
+static int smb2_get_info_filesystem(struct ksmbd_work *work,
+ struct smb2_query_info_req *req,
+ struct smb2_query_info_rsp *rsp)
+{
+ struct ksmbd_session *sess = work->sess;
+ struct ksmbd_conn *conn = work->conn;
+ struct ksmbd_share_config *share = work->tcon->share_conf;
+ int fsinfoclass = 0;
+ struct kstatfs stfs;
+ struct path path;
+ int rc = 0, len;
+
+ if (!share->path)
+ return -EIO;
+
+ rc = kern_path(share->path, LOOKUP_NO_SYMLINKS, &path);
+ if (rc) {
+ pr_err("cannot create vfs path\n");
+ return -EIO;
+ }
+
+ rc = vfs_statfs(&path, &stfs);
+ if (rc) {
+ pr_err("cannot do stat of path %s\n", share->path);
+ path_put(&path);
+ return -EIO;
+ }
+
+ fsinfoclass = req->FileInfoClass;
+
+ switch (fsinfoclass) {
+ case FS_DEVICE_INFORMATION:
+ {
+ struct filesystem_device_info *info;
+
+ info = (struct filesystem_device_info *)rsp->Buffer;
+
+ info->DeviceType = cpu_to_le32(stfs.f_type);
+ info->DeviceCharacteristics = cpu_to_le32(0x00000020);
+ rsp->OutputBufferLength = cpu_to_le32(8);
+ break;
+ }
+ case FS_ATTRIBUTE_INFORMATION:
+ {
+ struct filesystem_attribute_info *info;
+ size_t sz;
+
+ info = (struct filesystem_attribute_info *)rsp->Buffer;
+ info->Attributes = cpu_to_le32(FILE_SUPPORTS_OBJECT_IDS |
+ FILE_PERSISTENT_ACLS |
+ FILE_UNICODE_ON_DISK |
+ FILE_CASE_PRESERVED_NAMES |
+ FILE_CASE_SENSITIVE_SEARCH |
+ FILE_SUPPORTS_BLOCK_REFCOUNTING);
+
+ info->Attributes |= cpu_to_le32(server_conf.share_fake_fscaps);
+
+ if (test_share_config_flag(work->tcon->share_conf,
+ KSMBD_SHARE_FLAG_STREAMS))
+ info->Attributes |= cpu_to_le32(FILE_NAMED_STREAMS);
+
+ info->MaxPathNameComponentLength = cpu_to_le32(stfs.f_namelen);
+ len = smbConvertToUTF16((__le16 *)info->FileSystemName,
+ "NTFS", PATH_MAX, conn->local_nls, 0);
+ len = len * 2;
+ info->FileSystemNameLen = cpu_to_le32(len);
+ sz = sizeof(struct filesystem_attribute_info) - 2 + len;
+ rsp->OutputBufferLength = cpu_to_le32(sz);
+ break;
+ }
+ case FS_VOLUME_INFORMATION:
+ {
+ struct filesystem_vol_info *info;
+ size_t sz;
+ unsigned int serial_crc = 0;
+
+ info = (struct filesystem_vol_info *)(rsp->Buffer);
+ info->VolumeCreationTime = 0;
+ serial_crc = crc32_le(serial_crc, share->name,
+ strlen(share->name));
+ serial_crc = crc32_le(serial_crc, share->path,
+ strlen(share->path));
+ serial_crc = crc32_le(serial_crc, ksmbd_netbios_name(),
+ strlen(ksmbd_netbios_name()));
+ /* Taking dummy value of serial number*/
+ info->SerialNumber = cpu_to_le32(serial_crc);
+ len = smbConvertToUTF16((__le16 *)info->VolumeLabel,
+ share->name, PATH_MAX,
+ conn->local_nls, 0);
+ len = len * 2;
+ info->VolumeLabelSize = cpu_to_le32(len);
+ info->Reserved = 0;
+ sz = sizeof(struct filesystem_vol_info) - 2 + len;
+ rsp->OutputBufferLength = cpu_to_le32(sz);
+ break;
+ }
+ case FS_SIZE_INFORMATION:
+ {
+ struct filesystem_info *info;
+
+ info = (struct filesystem_info *)(rsp->Buffer);
+ info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
+ info->FreeAllocationUnits = cpu_to_le64(stfs.f_bfree);
+ info->SectorsPerAllocationUnit = cpu_to_le32(1);
+ info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
+ rsp->OutputBufferLength = cpu_to_le32(24);
+ break;
+ }
+ case FS_FULL_SIZE_INFORMATION:
+ {
+ struct smb2_fs_full_size_info *info;
+
+ info = (struct smb2_fs_full_size_info *)(rsp->Buffer);
+ info->TotalAllocationUnits = cpu_to_le64(stfs.f_blocks);
+ info->CallerAvailableAllocationUnits =
+ cpu_to_le64(stfs.f_bavail);
+ info->ActualAvailableAllocationUnits =
+ cpu_to_le64(stfs.f_bfree);
+ info->SectorsPerAllocationUnit = cpu_to_le32(1);
+ info->BytesPerSector = cpu_to_le32(stfs.f_bsize);
+ rsp->OutputBufferLength = cpu_to_le32(32);
+ break;
+ }
+ case FS_OBJECT_ID_INFORMATION:
+ {
+ struct object_id_info *info;
+
+ info = (struct object_id_info *)(rsp->Buffer);
+
+ if (!user_guest(sess->user))
+ memcpy(info->objid, user_passkey(sess->user), 16);
+ else
+ memset(info->objid, 0, 16);
+
+ info->extended_info.magic = cpu_to_le32(EXTENDED_INFO_MAGIC);
+ info->extended_info.version = cpu_to_le32(1);
+ info->extended_info.release = cpu_to_le32(1);
+ info->extended_info.rel_date = 0;
+ memcpy(info->extended_info.version_string, "1.1.0", strlen("1.1.0"));
+ rsp->OutputBufferLength = cpu_to_le32(64);
+ break;
+ }
+ case FS_SECTOR_SIZE_INFORMATION:
+ {
+ struct smb3_fs_ss_info *info;
+ unsigned int sector_size =
+ min_t(unsigned int, path.mnt->mnt_sb->s_blocksize, 4096);
+
+ info = (struct smb3_fs_ss_info *)(rsp->Buffer);
+
+ info->LogicalBytesPerSector = cpu_to_le32(sector_size);
+ info->PhysicalBytesPerSectorForAtomicity =
+ cpu_to_le32(sector_size);
+ info->PhysicalBytesPerSectorForPerf = cpu_to_le32(sector_size);
+ info->FSEffPhysicalBytesPerSectorForAtomicity =
+ cpu_to_le32(sector_size);
+ info->Flags = cpu_to_le32(SSINFO_FLAGS_ALIGNED_DEVICE |
+ SSINFO_FLAGS_PARTITION_ALIGNED_ON_DEVICE);
+ info->ByteOffsetForSectorAlignment = 0;
+ info->ByteOffsetForPartitionAlignment = 0;
+ rsp->OutputBufferLength = cpu_to_le32(28);
+ break;
+ }
+ case FS_CONTROL_INFORMATION:
+ {
+ /*
+ * TODO : The current implementation is based on
+ * test result with win7(NTFS) server. It's need to
+ * modify this to get valid Quota values
+ * from Linux kernel
+ */
+ struct smb2_fs_control_info *info;
+
+ info = (struct smb2_fs_control_info *)(rsp->Buffer);
+ info->FreeSpaceStartFiltering = 0;
+ info->FreeSpaceThreshold = 0;
+ info->FreeSpaceStopFiltering = 0;
+ info->DefaultQuotaThreshold = cpu_to_le64(SMB2_NO_FID);
+ info->DefaultQuotaLimit = cpu_to_le64(SMB2_NO_FID);
+ info->Padding = 0;
+ rsp->OutputBufferLength = cpu_to_le32(48);
+ break;
+ }
+ case FS_POSIX_INFORMATION:
+ {
+ struct filesystem_posix_info *info;
+
+ if (!work->tcon->posix_extensions) {
+ pr_err("client doesn't negotiate with SMB3.1.1 POSIX Extensions\n");
+ rc = -EOPNOTSUPP;
+ } else {
+ info = (struct filesystem_posix_info *)(rsp->Buffer);
+ info->OptimalTransferSize = cpu_to_le32(stfs.f_bsize);
+ info->BlockSize = cpu_to_le32(stfs.f_bsize);
+ info->TotalBlocks = cpu_to_le64(stfs.f_blocks);
+ info->BlocksAvail = cpu_to_le64(stfs.f_bfree);
+ info->UserBlocksAvail = cpu_to_le64(stfs.f_bavail);
+ info->TotalFileNodes = cpu_to_le64(stfs.f_files);
+ info->FreeFileNodes = cpu_to_le64(stfs.f_ffree);
+ rsp->OutputBufferLength = cpu_to_le32(56);
+ }
+ break;
+ }
+ default:
+ path_put(&path);
+ return -EOPNOTSUPP;
+ }
+ rc = buffer_check_err(le32_to_cpu(req->OutputBufferLength),
+ rsp, work->response_buf);
+ path_put(&path);
+ return rc;
+}
+
+static int smb2_get_info_sec(struct ksmbd_work *work,
+ struct smb2_query_info_req *req,
+ struct smb2_query_info_rsp *rsp)
+{
+ struct ksmbd_file *fp;
+ struct mnt_idmap *idmap;
+ struct smb_ntsd *pntsd = (struct smb_ntsd *)rsp->Buffer, *ppntsd = NULL;
+ struct smb_fattr fattr = {{0}};
+ struct inode *inode;
+ __u32 secdesclen = 0;
+ unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
+ int addition_info = le32_to_cpu(req->AdditionalInformation);
+ int rc = 0, ppntsd_size = 0;
+
+ if (addition_info & ~(OWNER_SECINFO | GROUP_SECINFO | DACL_SECINFO |
+ PROTECTED_DACL_SECINFO |
+ UNPROTECTED_DACL_SECINFO)) {
+ ksmbd_debug(SMB, "Unsupported addition info: 0x%x)\n",
+ addition_info);
+
+ pntsd->revision = cpu_to_le16(1);
+ pntsd->type = cpu_to_le16(SELF_RELATIVE | DACL_PROTECTED);
+ pntsd->osidoffset = 0;
+ pntsd->gsidoffset = 0;
+ pntsd->sacloffset = 0;
+ pntsd->dacloffset = 0;
+
+ secdesclen = sizeof(struct smb_ntsd);
+ rsp->OutputBufferLength = cpu_to_le32(secdesclen);
+
+ return 0;
+ }
+
+ if (work->next_smb2_rcv_hdr_off) {
+ if (!has_file_id(req->VolatileFileId)) {
+ ksmbd_debug(SMB, "Compound request set FID = %llu\n",
+ work->compound_fid);
+ id = work->compound_fid;
+ pid = work->compound_pfid;
+ }
+ }
+
+ if (!has_file_id(id)) {
+ id = req->VolatileFileId;
+ pid = req->PersistentFileId;
+ }
+
+ fp = ksmbd_lookup_fd_slow(work, id, pid);
+ if (!fp)
+ return -ENOENT;
+
+ idmap = file_mnt_idmap(fp->filp);
+ inode = file_inode(fp->filp);
+ ksmbd_acls_fattr(&fattr, idmap, inode);
+
+ if (test_share_config_flag(work->tcon->share_conf,
+ KSMBD_SHARE_FLAG_ACL_XATTR))
+ ppntsd_size = ksmbd_vfs_get_sd_xattr(work->conn, idmap,
+ fp->filp->f_path.dentry,
+ &ppntsd);
+
+ /* Check if sd buffer size exceeds response buffer size */
+ if (smb2_resp_buf_len(work, 8) > ppntsd_size)
+ rc = build_sec_desc(idmap, pntsd, ppntsd, ppntsd_size,
+ addition_info, &secdesclen, &fattr);
+ posix_acl_release(fattr.cf_acls);
+ posix_acl_release(fattr.cf_dacls);
+ kfree(ppntsd);
+ ksmbd_fd_put(work, fp);
+ if (rc)
+ return rc;
+
+ rsp->OutputBufferLength = cpu_to_le32(secdesclen);
+ return 0;
+}
+
+/**
+ * smb2_query_info() - handler for smb2 query info command
+ * @work: smb work containing query info request buffer
+ *
+ * Return: 0 on success, otherwise error
+ */
+int smb2_query_info(struct ksmbd_work *work)
+{
+ struct smb2_query_info_req *req;
+ struct smb2_query_info_rsp *rsp;
+ int rc = 0;
+
+ WORK_BUFFERS(work, req, rsp);
+
+ ksmbd_debug(SMB, "GOT query info request\n");
+
+ switch (req->InfoType) {
+ case SMB2_O_INFO_FILE:
+ ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
+ rc = smb2_get_info_file(work, req, rsp);
+ break;
+ case SMB2_O_INFO_FILESYSTEM:
+ ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILESYSTEM\n");
+ rc = smb2_get_info_filesystem(work, req, rsp);
+ break;
+ case SMB2_O_INFO_SECURITY:
+ ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
+ rc = smb2_get_info_sec(work, req, rsp);
+ break;
+ default:
+ ksmbd_debug(SMB, "InfoType %d not supported yet\n",
+ req->InfoType);
+ rc = -EOPNOTSUPP;
+ }
+
+ if (!rc) {
+ rsp->StructureSize = cpu_to_le16(9);
+ rsp->OutputBufferOffset = cpu_to_le16(72);
+ rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
+ offsetof(struct smb2_query_info_rsp, Buffer) +
+ le32_to_cpu(rsp->OutputBufferLength));
+ }
+
+ if (rc < 0) {
+ if (rc == -EACCES)
+ rsp->hdr.Status = STATUS_ACCESS_DENIED;
+ else if (rc == -ENOENT)
+ rsp->hdr.Status = STATUS_FILE_CLOSED;
+ else if (rc == -EIO)
+ rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
+ else if (rc == -ENOMEM)
+ rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
+ else if (rc == -EOPNOTSUPP || rsp->hdr.Status == 0)
+ rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
+ smb2_set_err_rsp(work);
+
+ ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n",
+ rc);
+ return rc;
+ }
+ return 0;
+}
+
+/**
+ * smb2_close_pipe() - handler for closing IPC pipe
+ * @work: smb work containing close request buffer
+ *
+ * Return: 0
+ */
+static noinline int smb2_close_pipe(struct ksmbd_work *work)
+{
+ u64 id;
+ struct smb2_close_req *req;
+ struct smb2_close_rsp *rsp;
+
+ WORK_BUFFERS(work, req, rsp);
+
+ id = req->VolatileFileId;
+ ksmbd_session_rpc_close(work->sess, id);
+
+ rsp->StructureSize = cpu_to_le16(60);
+ rsp->Flags = 0;
+ rsp->Reserved = 0;
+ rsp->CreationTime = 0;
+ rsp->LastAccessTime = 0;
+ rsp->LastWriteTime = 0;
+ rsp->ChangeTime = 0;
+ rsp->AllocationSize = 0;
+ rsp->EndOfFile = 0;
+ rsp->Attributes = 0;
+
+ return ksmbd_iov_pin_rsp(work, (void *)rsp,
+ sizeof(struct smb2_close_rsp));
+}
+
+/**
+ * smb2_close() - handler for smb2 close file command
+ * @work: smb work containing close request buffer
+ *
+ * Return: 0
+ */
+int smb2_close(struct ksmbd_work *work)
+{
+ u64 volatile_id = KSMBD_NO_FID;
+ u64 sess_id;
+ struct smb2_close_req *req;
+ struct smb2_close_rsp *rsp;
+ struct ksmbd_conn *conn = work->conn;
+ struct ksmbd_file *fp;
+ struct inode *inode;
+ u64 time;
+ int err = 0;
+
+ WORK_BUFFERS(work, req, rsp);
+
+ if (test_share_config_flag(work->tcon->share_conf,
+ KSMBD_SHARE_FLAG_PIPE)) {
+ ksmbd_debug(SMB, "IPC pipe close request\n");
+ return smb2_close_pipe(work);
+ }
+
+ sess_id = le64_to_cpu(req->hdr.SessionId);
+ if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
+ sess_id = work->compound_sid;
+
+ work->compound_sid = 0;
+ if (check_session_id(conn, sess_id)) {
+ work->compound_sid = sess_id;
+ } else {
+ rsp->hdr.Status = STATUS_USER_SESSION_DELETED;
+ if (req->hdr.Flags & SMB2_FLAGS_RELATED_OPERATIONS)
+ rsp->hdr.Status = STATUS_INVALID_PARAMETER;
+ err = -EBADF;
+ goto out;
+ }
+
+ if (work->next_smb2_rcv_hdr_off &&
+ !has_file_id(req->VolatileFileId)) {
+ if (!has_file_id(work->compound_fid)) {
+ /* file already closed, return FILE_CLOSED */
+ ksmbd_debug(SMB, "file already closed\n");
+ rsp->hdr.Status = STATUS_FILE_CLOSED;
+ err = -EBADF;
+ goto out;
+ } else {
+ ksmbd_debug(SMB,
+ "Compound request set FID = %llu:%llu\n",
+ work->compound_fid,
+ work->compound_pfid);
+ volatile_id = work->compound_fid;
+
+ /* file closed, stored id is not valid anymore */
+ work->compound_fid = KSMBD_NO_FID;
+ work->compound_pfid = KSMBD_NO_FID;
+ }
+ } else {
+ volatile_id = req->VolatileFileId;
+ }
+ ksmbd_debug(SMB, "volatile_id = %llu\n", volatile_id);
+
+ rsp->StructureSize = cpu_to_le16(60);
+ rsp->Reserved = 0;
+
+ if (req->Flags == SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB) {
+ fp = ksmbd_lookup_fd_fast(work, volatile_id);
+ if (!fp) {
+ err = -ENOENT;
+ goto out;
+ }
+
+ inode = file_inode(fp->filp);
+ rsp->Flags = SMB2_CLOSE_FLAG_POSTQUERY_ATTRIB;
+ rsp->AllocationSize = S_ISDIR(inode->i_mode) ? 0 :
+ cpu_to_le64(inode->i_blocks << 9);
+ rsp->EndOfFile = cpu_to_le64(inode->i_size);
+ rsp->Attributes = fp->f_ci->m_fattr;
+ rsp->CreationTime = cpu_to_le64(fp->create_time);
+ time = ksmbd_UnixTimeToNT(inode->i_atime);
+ rsp->LastAccessTime = cpu_to_le64(time);
+ time = ksmbd_UnixTimeToNT(inode->i_mtime);
+ rsp->LastWriteTime = cpu_to_le64(time);
+ time = ksmbd_UnixTimeToNT(inode_get_ctime(inode));
+ rsp->ChangeTime = cpu_to_le64(time);
+ ksmbd_fd_put(work, fp);
+ } else {
+ rsp->Flags = 0;
+ rsp->AllocationSize = 0;
+ rsp->EndOfFile = 0;
+ rsp->Attributes = 0;
+ rsp->CreationTime = 0;
+ rsp->LastAccessTime = 0;
+ rsp->LastWriteTime = 0;
+ rsp->ChangeTime = 0;
+ }
+
+ err = ksmbd_close_fd(work, volatile_id);
+out:
+ if (!err)
+ err = ksmbd_iov_pin_rsp(work, (void *)rsp,
+ sizeof(struct smb2_close_rsp));
+
+ if (err) {
+ if (rsp->hdr.Status == 0)
+ rsp->hdr.Status = STATUS_FILE_CLOSED;
+ smb2_set_err_rsp(work);
+ }
+
+ return err;
+}
+
+/**
+ * smb2_echo() - handler for smb2 echo(ping) command
+ * @work: smb work containing echo request buffer
+ *
+ * Return: 0
+ */
+int smb2_echo(struct ksmbd_work *work)
+{
+ struct smb2_echo_rsp *rsp = smb2_get_msg(work->response_buf);
+
+ if (work->next_smb2_rcv_hdr_off)
+ rsp = ksmbd_resp_buf_next(work);
+
+ rsp->StructureSize = cpu_to_le16(4);
+ rsp->Reserved = 0;
+ return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_echo_rsp));
+}
+
+static int smb2_rename(struct ksmbd_work *work,
+ struct ksmbd_file *fp,
+ struct smb2_file_rename_info *file_info,
+ struct nls_table *local_nls)
+{
+ struct ksmbd_share_config *share = fp->tcon->share_conf;
+ char *new_name = NULL;
+ int rc, flags = 0;
+
+ ksmbd_debug(SMB, "setting FILE_RENAME_INFO\n");
+ new_name = smb2_get_name(file_info->FileName,
+ le32_to_cpu(file_info->FileNameLength),
+ local_nls);
+ if (IS_ERR(new_name))
+ return PTR_ERR(new_name);
+
+ if (strchr(new_name, ':')) {
+ int s_type;
+ char *xattr_stream_name, *stream_name = NULL;
+ size_t xattr_stream_size;
+ int len;
+
+ rc = parse_stream_name(new_name, &stream_name, &s_type);
+ if (rc < 0)
+ goto out;
+
+ len = strlen(new_name);
+ if (len > 0 && new_name[len - 1] != '/') {
+ pr_err("not allow base filename in rename\n");
+ rc = -ESHARE;
+ goto out;
+ }
+
+ rc = ksmbd_vfs_xattr_stream_name(stream_name,
+ &xattr_stream_name,
+ &xattr_stream_size,
+ s_type);
+ if (rc)
+ goto out;
+
+ rc = ksmbd_vfs_setxattr(file_mnt_idmap(fp->filp),
+ &fp->filp->f_path,
+ xattr_stream_name,
+ NULL, 0, 0, true);
+ if (rc < 0) {
+ pr_err("failed to store stream name in xattr: %d\n",
+ rc);
+ rc = -EINVAL;
+ goto out;
+ }
+
+ goto out;
+ }
+
+ ksmbd_debug(SMB, "new name %s\n", new_name);
+ if (ksmbd_share_veto_filename(share, new_name)) {
+ rc = -ENOENT;
+ ksmbd_debug(SMB, "Can't rename vetoed file: %s\n", new_name);
+ goto out;
+ }
+
+ if (!file_info->ReplaceIfExists)
+ flags = RENAME_NOREPLACE;
+
+ smb_break_all_levII_oplock(work, fp, 0);
+ rc = ksmbd_vfs_rename(work, &fp->filp->f_path, new_name, flags);
+out:
+ kfree(new_name);
+ return rc;
+}
+
+static int smb2_create_link(struct ksmbd_work *work,
+ struct ksmbd_share_config *share,
+ struct smb2_file_link_info *file_info,
+ unsigned int buf_len, struct file *filp,
+ struct nls_table *local_nls)
+{
+ char *link_name = NULL, *target_name = NULL, *pathname = NULL;
+ struct path path, parent_path;
+ bool file_present = false;
+ int rc;
+
+ if (buf_len < (u64)sizeof(struct smb2_file_link_info) +
+ le32_to_cpu(file_info->FileNameLength))
+ return -EINVAL;
+
+ ksmbd_debug(SMB, "setting FILE_LINK_INFORMATION\n");
+ pathname = kmalloc(PATH_MAX, GFP_KERNEL);
+ if (!pathname)
+ return -ENOMEM;
+
+ link_name = smb2_get_name(file_info->FileName,
+ le32_to_cpu(file_info->FileNameLength),
+ local_nls);
+ if (IS_ERR(link_name) || S_ISDIR(file_inode(filp)->i_mode)) {
+ rc = -EINVAL;
+ goto out;
+ }
+
+ ksmbd_debug(SMB, "link name is %s\n", link_name);
+ target_name = file_path(filp, pathname, PATH_MAX);
+ if (IS_ERR(target_name)) {
+ rc = -EINVAL;
+ goto out;
+ }
+
+ ksmbd_debug(SMB, "target name is %s\n", target_name);
+ rc = ksmbd_vfs_kern_path_locked(work, link_name, LOOKUP_NO_SYMLINKS,
+ &parent_path, &path, 0);
+ if (rc) {
+ if (rc != -ENOENT)
+ goto out;
+ } else
+ file_present = true;
+
+ if (file_info->ReplaceIfExists) {
+ if (file_present) {
+ rc = ksmbd_vfs_remove_file(work, &path);
+ if (rc) {
+ rc = -EINVAL;
+ ksmbd_debug(SMB, "cannot delete %s\n",
+ link_name);
+ goto out;
+ }
+ }
+ } else {
+ if (file_present) {
+ rc = -EEXIST;
+ ksmbd_debug(SMB, "link already exists\n");
+ goto out;
+ }
+ }
+
+ rc = ksmbd_vfs_link(work, target_name, link_name);
+ if (rc)
+ rc = -EINVAL;
+out:
+ if (file_present)
+ ksmbd_vfs_kern_path_unlock(&parent_path, &path);
+
+ if (!IS_ERR(link_name))
+ kfree(link_name);
+ kfree(pathname);
+ return rc;
+}
+
+static int set_file_basic_info(struct ksmbd_file *fp,
+ struct smb2_file_basic_info *file_info,
+ struct ksmbd_share_config *share)
+{
+ struct iattr attrs;
+ struct file *filp;
+ struct inode *inode;
+ struct mnt_idmap *idmap;
+ int rc = 0;
+
+ if (!(fp->daccess & FILE_WRITE_ATTRIBUTES_LE))
+ return -EACCES;
+
+ attrs.ia_valid = 0;
+ filp = fp->filp;
+ inode = file_inode(filp);
+ idmap = file_mnt_idmap(filp);
+
+ if (file_info->CreationTime)
+ fp->create_time = le64_to_cpu(file_info->CreationTime);
+
+ if (file_info->LastAccessTime) {
+ attrs.ia_atime = ksmbd_NTtimeToUnix(file_info->LastAccessTime);
+ attrs.ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
+ }
+
+ attrs.ia_valid |= ATTR_CTIME;
+ if (file_info->ChangeTime)
+ attrs.ia_ctime = ksmbd_NTtimeToUnix(file_info->ChangeTime);
+ else
+ attrs.ia_ctime = inode_get_ctime(inode);
+
+ if (file_info->LastWriteTime) {
+ attrs.ia_mtime = ksmbd_NTtimeToUnix(file_info->LastWriteTime);
+ attrs.ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
+ }
+
+ if (file_info->Attributes) {
+ if (!S_ISDIR(inode->i_mode) &&
+ file_info->Attributes & FILE_ATTRIBUTE_DIRECTORY_LE) {
+ pr_err("can't change a file to a directory\n");
+ return -EINVAL;
+ }
+
+ if (!(S_ISDIR(inode->i_mode) && file_info->Attributes == FILE_ATTRIBUTE_NORMAL_LE))
+ fp->f_ci->m_fattr = file_info->Attributes |
+ (fp->f_ci->m_fattr & FILE_ATTRIBUTE_DIRECTORY_LE);
+ }
+
+ if (test_share_config_flag(share, KSMBD_SHARE_FLAG_STORE_DOS_ATTRS) &&
+ (file_info->CreationTime || file_info->Attributes)) {
+ struct xattr_dos_attrib da = {0};
+
+ da.version = 4;
+ da.itime = fp->itime;
+ da.create_time = fp->create_time;
+ da.attr = le32_to_cpu(fp->f_ci->m_fattr);
+ da.flags = XATTR_DOSINFO_ATTRIB | XATTR_DOSINFO_CREATE_TIME |
+ XATTR_DOSINFO_ITIME;
+
+ rc = ksmbd_vfs_set_dos_attrib_xattr(idmap, &filp->f_path, &da,
+ true);
+ if (rc)
+ ksmbd_debug(SMB,
+ "failed to restore file attribute in EA\n");
+ rc = 0;
+ }
+
+ if (attrs.ia_valid) {
+ struct dentry *dentry = filp->f_path.dentry;
+ struct inode *inode = d_inode(dentry);
+
+ if (IS_IMMUTABLE(inode) || IS_APPEND(inode))
+ return -EACCES;
+
+ inode_lock(inode);
+ inode_set_ctime_to_ts(inode, attrs.ia_ctime);
+ attrs.ia_valid &= ~ATTR_CTIME;
+ rc = notify_change(idmap, dentry, &attrs, NULL);
+ inode_unlock(inode);
+ }
+ return rc;
+}
+
+static int set_file_allocation_info(struct ksmbd_work *work,
+ struct ksmbd_file *fp,
+ struct smb2_file_alloc_info *file_alloc_info)
+{
+ /*
+ * TODO : It's working fine only when store dos attributes
+ * is not yes. need to implement a logic which works
+ * properly with any smb.conf option
+ */
+
+ loff_t alloc_blks;
+ struct inode *inode;
+ int rc;
+
+ if (!(fp->daccess & FILE_WRITE_DATA_LE))
+ return -EACCES;
+
+ alloc_blks = (le64_to_cpu(file_alloc_info->AllocationSize) + 511) >> 9;
+ inode = file_inode(fp->filp);
+
+ if (alloc_blks > inode->i_blocks) {
+ smb_break_all_levII_oplock(work, fp, 1);
+ rc = vfs_fallocate(fp->filp, FALLOC_FL_KEEP_SIZE, 0,
+ alloc_blks * 512);
+ if (rc && rc != -EOPNOTSUPP) {
+ pr_err("vfs_fallocate is failed : %d\n", rc);
+ return rc;
+ }
+ } else if (alloc_blks < inode->i_blocks) {
+ loff_t size;
+
+ /*
+ * Allocation size could be smaller than original one
+ * which means allocated blocks in file should be
+ * deallocated. use truncate to cut out it, but inode
+ * size is also updated with truncate offset.
+ * inode size is retained by backup inode size.
+ */
+ size = i_size_read(inode);
+ rc = ksmbd_vfs_truncate(work, fp, alloc_blks * 512);
+ if (rc) {
+ pr_err("truncate failed!, err %d\n", rc);
+ return rc;
+ }
+ if (size < alloc_blks * 512)
+ i_size_write(inode, size);
+ }
+ return 0;
+}
+
+static int set_end_of_file_info(struct ksmbd_work *work, struct ksmbd_file *fp,
+ struct smb2_file_eof_info *file_eof_info)
+{
+ loff_t newsize;
+ struct inode *inode;
+ int rc;
+
+ if (!(fp->daccess & FILE_WRITE_DATA_LE))
+ return -EACCES;
+
+ newsize = le64_to_cpu(file_eof_info->EndOfFile);
+ inode = file_inode(fp->filp);
+
+ /*
+ * If FILE_END_OF_FILE_INFORMATION of set_info_file is called
+ * on FAT32 shared device, truncate execution time is too long
+ * and network error could cause from windows client. because
+ * truncate of some filesystem like FAT32 fill zero data in
+ * truncated range.
+ */
+ if (inode->i_sb->s_magic != MSDOS_SUPER_MAGIC) {
+ ksmbd_debug(SMB, "truncated to newsize %lld\n", newsize);
+ rc = ksmbd_vfs_truncate(work, fp, newsize);
+ if (rc) {
+ ksmbd_debug(SMB, "truncate failed!, err %d\n", rc);
+ if (rc != -EAGAIN)
+ rc = -EBADF;
+ return rc;
+ }
+ }
+ return 0;
+}
+
+static int set_rename_info(struct ksmbd_work *work, struct ksmbd_file *fp,
+ struct smb2_file_rename_info *rename_info,
+ unsigned int buf_len)
+{
+ if (!(fp->daccess & FILE_DELETE_LE)) {
+ pr_err("no right to delete : 0x%x\n", fp->daccess);
+ return -EACCES;
+ }
+
+ if (buf_len < (u64)sizeof(struct smb2_file_rename_info) +
+ le32_to_cpu(rename_info->FileNameLength))
+ return -EINVAL;
+
+ if (!le32_to_cpu(rename_info->FileNameLength))
+ return -EINVAL;
+
+ return smb2_rename(work, fp, rename_info, work->conn->local_nls);
+}
+
+static int set_file_disposition_info(struct ksmbd_file *fp,
+ struct smb2_file_disposition_info *file_info)
+{
+ struct inode *inode;
+
+ if (!(fp->daccess & FILE_DELETE_LE)) {
+ pr_err("no right to delete : 0x%x\n", fp->daccess);
+ return -EACCES;
+ }
+
+ inode = file_inode(fp->filp);
+ if (file_info->DeletePending) {
+ if (S_ISDIR(inode->i_mode) &&
+ ksmbd_vfs_empty_dir(fp) == -ENOTEMPTY)
+ return -EBUSY;
+ ksmbd_set_inode_pending_delete(fp);
+ } else {
+ ksmbd_clear_inode_pending_delete(fp);
+ }
+ return 0;
+}
+
+static int set_file_position_info(struct ksmbd_file *fp,
+ struct smb2_file_pos_info *file_info)
+{
+ loff_t current_byte_offset;
+ unsigned long sector_size;
+ struct inode *inode;
+
+ inode = file_inode(fp->filp);
+ current_byte_offset = le64_to_cpu(file_info->CurrentByteOffset);
+ sector_size = inode->i_sb->s_blocksize;
+
+ if (current_byte_offset < 0 ||
+ (fp->coption == FILE_NO_INTERMEDIATE_BUFFERING_LE &&
+ current_byte_offset & (sector_size - 1))) {
+ pr_err("CurrentByteOffset is not valid : %llu\n",
+ current_byte_offset);
+ return -EINVAL;
+ }
+
+ fp->filp->f_pos = current_byte_offset;
+ return 0;
+}
+
+static int set_file_mode_info(struct ksmbd_file *fp,
+ struct smb2_file_mode_info *file_info)
+{
+ __le32 mode;
+
+ mode = file_info->Mode;
+
+ if ((mode & ~FILE_MODE_INFO_MASK)) {
+ pr_err("Mode is not valid : 0x%x\n", le32_to_cpu(mode));
+ return -EINVAL;
+ }
+
+ /*
+ * TODO : need to implement consideration for
+ * FILE_SYNCHRONOUS_IO_ALERT and FILE_SYNCHRONOUS_IO_NONALERT
+ */
+ ksmbd_vfs_set_fadvise(fp->filp, mode);
+ fp->coption = mode;
+ return 0;
+}
+
+/**
+ * smb2_set_info_file() - handler for smb2 set info command
+ * @work: smb work containing set info command buffer
+ * @fp: ksmbd_file pointer
+ * @req: request buffer pointer
+ * @share: ksmbd_share_config pointer
+ *
+ * Return: 0 on success, otherwise error
+ * TODO: need to implement an error handling for STATUS_INFO_LENGTH_MISMATCH
+ */
+static int smb2_set_info_file(struct ksmbd_work *work, struct ksmbd_file *fp,
+ struct smb2_set_info_req *req,
+ struct ksmbd_share_config *share)
+{
+ unsigned int buf_len = le32_to_cpu(req->BufferLength);
+
+ switch (req->FileInfoClass) {
+ case FILE_BASIC_INFORMATION:
+ {
+ if (buf_len < sizeof(struct smb2_file_basic_info))
+ return -EINVAL;
+
+ return set_file_basic_info(fp, (struct smb2_file_basic_info *)req->Buffer, share);
+ }
+ case FILE_ALLOCATION_INFORMATION:
+ {
+ if (buf_len < sizeof(struct smb2_file_alloc_info))
+ return -EINVAL;
+
+ return set_file_allocation_info(work, fp,
+ (struct smb2_file_alloc_info *)req->Buffer);
+ }
+ case FILE_END_OF_FILE_INFORMATION:
+ {
+ if (buf_len < sizeof(struct smb2_file_eof_info))
+ return -EINVAL;
+
+ return set_end_of_file_info(work, fp,
+ (struct smb2_file_eof_info *)req->Buffer);
+ }
+ case FILE_RENAME_INFORMATION:
+ {
+ if (buf_len < sizeof(struct smb2_file_rename_info))
+ return -EINVAL;
+
+ return set_rename_info(work, fp,
+ (struct smb2_file_rename_info *)req->Buffer,
+ buf_len);
+ }
+ case FILE_LINK_INFORMATION:
+ {
+ if (buf_len < sizeof(struct smb2_file_link_info))
+ return -EINVAL;
+
+ return smb2_create_link(work, work->tcon->share_conf,
+ (struct smb2_file_link_info *)req->Buffer,
+ buf_len, fp->filp,
+ work->conn->local_nls);
+ }
+ case FILE_DISPOSITION_INFORMATION:
+ {
+ if (buf_len < sizeof(struct smb2_file_disposition_info))
+ return -EINVAL;
+
+ return set_file_disposition_info(fp,
+ (struct smb2_file_disposition_info *)req->Buffer);
+ }
+ case FILE_FULL_EA_INFORMATION:
+ {
+ if (!(fp->daccess & FILE_WRITE_EA_LE)) {
+ pr_err("Not permitted to write ext attr: 0x%x\n",
+ fp->daccess);
+ return -EACCES;
+ }
+
+ if (buf_len < sizeof(struct smb2_ea_info))
+ return -EINVAL;
+
+ return smb2_set_ea((struct smb2_ea_info *)req->Buffer,
+ buf_len, &fp->filp->f_path, true);
+ }
+ case FILE_POSITION_INFORMATION:
+ {
+ if (buf_len < sizeof(struct smb2_file_pos_info))
+ return -EINVAL;
+
+ return set_file_position_info(fp, (struct smb2_file_pos_info *)req->Buffer);
+ }
+ case FILE_MODE_INFORMATION:
+ {
+ if (buf_len < sizeof(struct smb2_file_mode_info))
+ return -EINVAL;
+
+ return set_file_mode_info(fp, (struct smb2_file_mode_info *)req->Buffer);
+ }
+ }
+
+ pr_err("Unimplemented Fileinfoclass :%d\n", req->FileInfoClass);
+ return -EOPNOTSUPP;
+}
+
+static int smb2_set_info_sec(struct ksmbd_file *fp, int addition_info,
+ char *buffer, int buf_len)
+{
+ struct smb_ntsd *pntsd = (struct smb_ntsd *)buffer;
+
+ fp->saccess |= FILE_SHARE_DELETE_LE;
+
+ return set_info_sec(fp->conn, fp->tcon, &fp->filp->f_path, pntsd,
+ buf_len, false, true);
+}
+
+/**
+ * smb2_set_info() - handler for smb2 set info command handler
+ * @work: smb work containing set info request buffer
+ *
+ * Return: 0 on success, otherwise error
+ */
+int smb2_set_info(struct ksmbd_work *work)
+{
+ struct smb2_set_info_req *req;
+ struct smb2_set_info_rsp *rsp;
+ struct ksmbd_file *fp = NULL;
+ int rc = 0;
+ unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
+
+ ksmbd_debug(SMB, "Received set info request\n");
+
+ if (work->next_smb2_rcv_hdr_off) {
+ req = ksmbd_req_buf_next(work);
+ rsp = ksmbd_resp_buf_next(work);
+ if (!has_file_id(req->VolatileFileId)) {
+ ksmbd_debug(SMB, "Compound request set FID = %llu\n",
+ work->compound_fid);
+ id = work->compound_fid;
+ pid = work->compound_pfid;
+ }
+ } else {
+ req = smb2_get_msg(work->request_buf);
+ rsp = smb2_get_msg(work->response_buf);
+ }
+
+ if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
+ ksmbd_debug(SMB, "User does not have write permission\n");
+ pr_err("User does not have write permission\n");
+ rc = -EACCES;
+ goto err_out;
+ }
+
+ if (!has_file_id(id)) {
+ id = req->VolatileFileId;
+ pid = req->PersistentFileId;
+ }
+
+ fp = ksmbd_lookup_fd_slow(work, id, pid);
+ if (!fp) {
+ ksmbd_debug(SMB, "Invalid id for close: %u\n", id);
+ rc = -ENOENT;
+ goto err_out;
+ }
+
+ switch (req->InfoType) {
+ case SMB2_O_INFO_FILE:
+ ksmbd_debug(SMB, "GOT SMB2_O_INFO_FILE\n");
+ rc = smb2_set_info_file(work, fp, req, work->tcon->share_conf);
+ break;
+ case SMB2_O_INFO_SECURITY:
+ ksmbd_debug(SMB, "GOT SMB2_O_INFO_SECURITY\n");
+ if (ksmbd_override_fsids(work)) {
+ rc = -ENOMEM;
+ goto err_out;
+ }
+ rc = smb2_set_info_sec(fp,
+ le32_to_cpu(req->AdditionalInformation),
+ req->Buffer,
+ le32_to_cpu(req->BufferLength));
+ ksmbd_revert_fsids(work);
+ break;
+ default:
+ rc = -EOPNOTSUPP;
+ }
+
+ if (rc < 0)
+ goto err_out;
+
+ rsp->StructureSize = cpu_to_le16(2);
+ rc = ksmbd_iov_pin_rsp(work, (void *)rsp,
+ sizeof(struct smb2_set_info_rsp));
+ if (rc)
+ goto err_out;
+ ksmbd_fd_put(work, fp);
+ return 0;
+
+err_out:
+ if (rc == -EACCES || rc == -EPERM || rc == -EXDEV)
+ rsp->hdr.Status = STATUS_ACCESS_DENIED;
+ else if (rc == -EINVAL)
+ rsp->hdr.Status = STATUS_INVALID_PARAMETER;
+ else if (rc == -ESHARE)
+ rsp->hdr.Status = STATUS_SHARING_VIOLATION;
+ else if (rc == -ENOENT)
+ rsp->hdr.Status = STATUS_OBJECT_NAME_INVALID;
+ else if (rc == -EBUSY || rc == -ENOTEMPTY)
+ rsp->hdr.Status = STATUS_DIRECTORY_NOT_EMPTY;
+ else if (rc == -EAGAIN)
+ rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
+ else if (rc == -EBADF || rc == -ESTALE)
+ rsp->hdr.Status = STATUS_INVALID_HANDLE;
+ else if (rc == -EEXIST)
+ rsp->hdr.Status = STATUS_OBJECT_NAME_COLLISION;
+ else if (rsp->hdr.Status == 0 || rc == -EOPNOTSUPP)
+ rsp->hdr.Status = STATUS_INVALID_INFO_CLASS;
+ smb2_set_err_rsp(work);
+ ksmbd_fd_put(work, fp);
+ ksmbd_debug(SMB, "error while processing smb2 query rc = %d\n", rc);
+ return rc;
+}
+
+/**
+ * smb2_read_pipe() - handler for smb2 read from IPC pipe
+ * @work: smb work containing read IPC pipe command buffer
+ *
+ * Return: 0 on success, otherwise error
+ */
+static noinline int smb2_read_pipe(struct ksmbd_work *work)
+{
+ int nbytes = 0, err;
+ u64 id;
+ struct ksmbd_rpc_command *rpc_resp;
+ struct smb2_read_req *req;
+ struct smb2_read_rsp *rsp;
+
+ WORK_BUFFERS(work, req, rsp);
+
+ id = req->VolatileFileId;
+
+ rpc_resp = ksmbd_rpc_read(work->sess, id);
+ if (rpc_resp) {
+ void *aux_payload_buf;
+
+ if (rpc_resp->flags != KSMBD_RPC_OK) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ aux_payload_buf =
+ kvmalloc(rpc_resp->payload_sz, GFP_KERNEL);
+ if (!aux_payload_buf) {
+ err = -ENOMEM;
+ goto out;
+ }
+
+ memcpy(aux_payload_buf, rpc_resp->payload, rpc_resp->payload_sz);
+
+ nbytes = rpc_resp->payload_sz;
+ err = ksmbd_iov_pin_rsp_read(work, (void *)rsp,
+ offsetof(struct smb2_read_rsp, Buffer),
+ aux_payload_buf, nbytes);
+ if (err)
+ goto out;
+ kvfree(rpc_resp);
+ } else {
+ err = ksmbd_iov_pin_rsp(work, (void *)rsp,
+ offsetof(struct smb2_read_rsp, Buffer));
+ if (err)
+ goto out;
+ }
+
+ rsp->StructureSize = cpu_to_le16(17);
+ rsp->DataOffset = 80;
+ rsp->Reserved = 0;
+ rsp->DataLength = cpu_to_le32(nbytes);
+ rsp->DataRemaining = 0;
+ rsp->Flags = 0;
+ return 0;
+
+out:
+ rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
+ smb2_set_err_rsp(work);
+ kvfree(rpc_resp);
+ return err;
+}
+
+static int smb2_set_remote_key_for_rdma(struct ksmbd_work *work,
+ struct smb2_buffer_desc_v1 *desc,
+ __le32 Channel,
+ __le16 ChannelInfoLength)
+{
+ unsigned int i, ch_count;
+
+ if (work->conn->dialect == SMB30_PROT_ID &&
+ Channel != SMB2_CHANNEL_RDMA_V1)
+ return -EINVAL;
+
+ ch_count = le16_to_cpu(ChannelInfoLength) / sizeof(*desc);
+ if (ksmbd_debug_types & KSMBD_DEBUG_RDMA) {
+ for (i = 0; i < ch_count; i++) {
+ pr_info("RDMA r/w request %#x: token %#x, length %#x\n",
+ i,
+ le32_to_cpu(desc[i].token),
+ le32_to_cpu(desc[i].length));
+ }
+ }
+ if (!ch_count)
+ return -EINVAL;
+
+ work->need_invalidate_rkey =
+ (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE);
+ if (Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE)
+ work->remote_key = le32_to_cpu(desc->token);
+ return 0;
+}
+
+static ssize_t smb2_read_rdma_channel(struct ksmbd_work *work,
+ struct smb2_read_req *req, void *data_buf,
+ size_t length)
+{
+ int err;
+
+ err = ksmbd_conn_rdma_write(work->conn, data_buf, length,
+ (struct smb2_buffer_desc_v1 *)
+ ((char *)req + le16_to_cpu(req->ReadChannelInfoOffset)),
+ le16_to_cpu(req->ReadChannelInfoLength));
+ if (err)
+ return err;
+
+ return length;
+}
+
+/**
+ * smb2_read() - handler for smb2 read from file
+ * @work: smb work containing read command buffer
+ *
+ * Return: 0 on success, otherwise error
+ */
+int smb2_read(struct ksmbd_work *work)
+{
+ struct ksmbd_conn *conn = work->conn;
+ struct smb2_read_req *req;
+ struct smb2_read_rsp *rsp;
+ struct ksmbd_file *fp = NULL;
+ loff_t offset;
+ size_t length, mincount;
+ ssize_t nbytes = 0, remain_bytes = 0;
+ int err = 0;
+ bool is_rdma_channel = false;
+ unsigned int max_read_size = conn->vals->max_read_size;
+ unsigned int id = KSMBD_NO_FID, pid = KSMBD_NO_FID;
+ void *aux_payload_buf;
+
+ if (test_share_config_flag(work->tcon->share_conf,
+ KSMBD_SHARE_FLAG_PIPE)) {
+ ksmbd_debug(SMB, "IPC pipe read request\n");
+ return smb2_read_pipe(work);
+ }
+
+ if (work->next_smb2_rcv_hdr_off) {
+ req = ksmbd_req_buf_next(work);
+ rsp = ksmbd_resp_buf_next(work);
+ if (!has_file_id(req->VolatileFileId)) {
+ ksmbd_debug(SMB, "Compound request set FID = %llu\n",
+ work->compound_fid);
+ id = work->compound_fid;
+ pid = work->compound_pfid;
+ }
+ } else {
+ req = smb2_get_msg(work->request_buf);
+ rsp = smb2_get_msg(work->response_buf);
+ }
+
+ if (!has_file_id(id)) {
+ id = req->VolatileFileId;
+ pid = req->PersistentFileId;
+ }
+
+ if (req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE ||
+ req->Channel == SMB2_CHANNEL_RDMA_V1) {
+ is_rdma_channel = true;
+ max_read_size = get_smbd_max_read_write_size();
+ }
+
+ if (is_rdma_channel == true) {
+ unsigned int ch_offset = le16_to_cpu(req->ReadChannelInfoOffset);
+
+ if (ch_offset < offsetof(struct smb2_read_req, Buffer)) {
+ err = -EINVAL;
+ goto out;
+ }
+ err = smb2_set_remote_key_for_rdma(work,
+ (struct smb2_buffer_desc_v1 *)
+ ((char *)req + ch_offset),
+ req->Channel,
+ req->ReadChannelInfoLength);
+ if (err)
+ goto out;
+ }
+
+ fp = ksmbd_lookup_fd_slow(work, id, pid);
+ if (!fp) {
+ err = -ENOENT;
+ goto out;
+ }
+
+ if (!(fp->daccess & (FILE_READ_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
+ pr_err("Not permitted to read : 0x%x\n", fp->daccess);
+ err = -EACCES;
+ goto out;
+ }
+
+ offset = le64_to_cpu(req->Offset);
+ length = le32_to_cpu(req->Length);
+ mincount = le32_to_cpu(req->MinimumCount);
+
+ if (length > max_read_size) {
+ ksmbd_debug(SMB, "limiting read size to max size(%u)\n",
+ max_read_size);
+ err = -EINVAL;
+ goto out;
+ }
+
+ ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
+ fp->filp, offset, length);
+
+ aux_payload_buf = kvzalloc(length, GFP_KERNEL);
+ if (!aux_payload_buf) {
+ err = -ENOMEM;
+ goto out;
+ }
+
+ nbytes = ksmbd_vfs_read(work, fp, length, &offset, aux_payload_buf);
+ if (nbytes < 0) {
+ err = nbytes;
+ goto out;
+ }
+
+ if ((nbytes == 0 && length != 0) || nbytes < mincount) {
+ kvfree(aux_payload_buf);
+ rsp->hdr.Status = STATUS_END_OF_FILE;
+ smb2_set_err_rsp(work);
+ ksmbd_fd_put(work, fp);
+ return 0;
+ }
+
+ ksmbd_debug(SMB, "nbytes %zu, offset %lld mincount %zu\n",
+ nbytes, offset, mincount);
+
+ if (is_rdma_channel == true) {
+ /* write data to the client using rdma channel */
+ remain_bytes = smb2_read_rdma_channel(work, req,
+ aux_payload_buf,
+ nbytes);
+ kvfree(aux_payload_buf);
+ aux_payload_buf = NULL;
+ nbytes = 0;
+ if (remain_bytes < 0) {
+ err = (int)remain_bytes;
+ goto out;
+ }
+ }
+
+ rsp->StructureSize = cpu_to_le16(17);
+ rsp->DataOffset = 80;
+ rsp->Reserved = 0;
+ rsp->DataLength = cpu_to_le32(nbytes);
+ rsp->DataRemaining = cpu_to_le32(remain_bytes);
+ rsp->Flags = 0;
+ err = ksmbd_iov_pin_rsp_read(work, (void *)rsp,
+ offsetof(struct smb2_read_rsp, Buffer),
+ aux_payload_buf, nbytes);
+ if (err)
+ goto out;
+ ksmbd_fd_put(work, fp);
+ return 0;
+
+out:
+ if (err) {
+ if (err == -EISDIR)
+ rsp->hdr.Status = STATUS_INVALID_DEVICE_REQUEST;
+ else if (err == -EAGAIN)
+ rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
+ else if (err == -ENOENT)
+ rsp->hdr.Status = STATUS_FILE_CLOSED;
+ else if (err == -EACCES)
+ rsp->hdr.Status = STATUS_ACCESS_DENIED;
+ else if (err == -ESHARE)
+ rsp->hdr.Status = STATUS_SHARING_VIOLATION;
+ else if (err == -EINVAL)
+ rsp->hdr.Status = STATUS_INVALID_PARAMETER;
+ else
+ rsp->hdr.Status = STATUS_INVALID_HANDLE;
+
+ smb2_set_err_rsp(work);
+ }
+ ksmbd_fd_put(work, fp);
+ return err;
+}
+
+/**
+ * smb2_write_pipe() - handler for smb2 write on IPC pipe
+ * @work: smb work containing write IPC pipe command buffer
+ *
+ * Return: 0 on success, otherwise error
+ */
+static noinline int smb2_write_pipe(struct ksmbd_work *work)
+{
+ struct smb2_write_req *req;
+ struct smb2_write_rsp *rsp;
+ struct ksmbd_rpc_command *rpc_resp;
+ u64 id = 0;
+ int err = 0, ret = 0;
+ char *data_buf;
+ size_t length;
+
+ WORK_BUFFERS(work, req, rsp);
+
+ length = le32_to_cpu(req->Length);
+ id = req->VolatileFileId;
+
+ if ((u64)le16_to_cpu(req->DataOffset) + length >
+ get_rfc1002_len(work->request_buf)) {
+ pr_err("invalid write data offset %u, smb_len %u\n",
+ le16_to_cpu(req->DataOffset),
+ get_rfc1002_len(work->request_buf));
+ err = -EINVAL;
+ goto out;
+ }
+
+ data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
+ le16_to_cpu(req->DataOffset));
+
+ rpc_resp = ksmbd_rpc_write(work->sess, id, data_buf, length);
+ if (rpc_resp) {
+ if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
+ rsp->hdr.Status = STATUS_NOT_SUPPORTED;
+ kvfree(rpc_resp);
+ smb2_set_err_rsp(work);
+ return -EOPNOTSUPP;
+ }
+ if (rpc_resp->flags != KSMBD_RPC_OK) {
+ rsp->hdr.Status = STATUS_INVALID_HANDLE;
+ smb2_set_err_rsp(work);
+ kvfree(rpc_resp);
+ return ret;
+ }
+ kvfree(rpc_resp);
+ }
+
+ rsp->StructureSize = cpu_to_le16(17);
+ rsp->DataOffset = 0;
+ rsp->Reserved = 0;
+ rsp->DataLength = cpu_to_le32(length);
+ rsp->DataRemaining = 0;
+ rsp->Reserved2 = 0;
+ err = ksmbd_iov_pin_rsp(work, (void *)rsp,
+ offsetof(struct smb2_write_rsp, Buffer));
+out:
+ if (err) {
+ rsp->hdr.Status = STATUS_INVALID_HANDLE;
+ smb2_set_err_rsp(work);
+ }
+
+ return err;
+}
+
+static ssize_t smb2_write_rdma_channel(struct ksmbd_work *work,
+ struct smb2_write_req *req,
+ struct ksmbd_file *fp,
+ loff_t offset, size_t length, bool sync)
+{
+ char *data_buf;
+ int ret;
+ ssize_t nbytes;
+
+ data_buf = kvzalloc(length, GFP_KERNEL);
+ if (!data_buf)
+ return -ENOMEM;
+
+ ret = ksmbd_conn_rdma_read(work->conn, data_buf, length,
+ (struct smb2_buffer_desc_v1 *)
+ ((char *)req + le16_to_cpu(req->WriteChannelInfoOffset)),
+ le16_to_cpu(req->WriteChannelInfoLength));
+ if (ret < 0) {
+ kvfree(data_buf);
+ return ret;
+ }
+
+ ret = ksmbd_vfs_write(work, fp, data_buf, length, &offset, sync, &nbytes);
+ kvfree(data_buf);
+ if (ret < 0)
+ return ret;
+
+ return nbytes;
+}
+
+/**
+ * smb2_write() - handler for smb2 write from file
+ * @work: smb work containing write command buffer
+ *
+ * Return: 0 on success, otherwise error
+ */
+int smb2_write(struct ksmbd_work *work)
+{
+ struct smb2_write_req *req;
+ struct smb2_write_rsp *rsp;
+ struct ksmbd_file *fp = NULL;
+ loff_t offset;
+ size_t length;
+ ssize_t nbytes;
+ char *data_buf;
+ bool writethrough = false, is_rdma_channel = false;
+ int err = 0;
+ unsigned int max_write_size = work->conn->vals->max_write_size;
+
+ WORK_BUFFERS(work, req, rsp);
+
+ if (test_share_config_flag(work->tcon->share_conf, KSMBD_SHARE_FLAG_PIPE)) {
+ ksmbd_debug(SMB, "IPC pipe write request\n");
+ return smb2_write_pipe(work);
+ }
+
+ offset = le64_to_cpu(req->Offset);
+ length = le32_to_cpu(req->Length);
+
+ if (req->Channel == SMB2_CHANNEL_RDMA_V1 ||
+ req->Channel == SMB2_CHANNEL_RDMA_V1_INVALIDATE) {
+ is_rdma_channel = true;
+ max_write_size = get_smbd_max_read_write_size();
+ length = le32_to_cpu(req->RemainingBytes);
+ }
+
+ if (is_rdma_channel == true) {
+ unsigned int ch_offset = le16_to_cpu(req->WriteChannelInfoOffset);
+
+ if (req->Length != 0 || req->DataOffset != 0 ||
+ ch_offset < offsetof(struct smb2_write_req, Buffer)) {
+ err = -EINVAL;
+ goto out;
+ }
+ err = smb2_set_remote_key_for_rdma(work,
+ (struct smb2_buffer_desc_v1 *)
+ ((char *)req + ch_offset),
+ req->Channel,
+ req->WriteChannelInfoLength);
+ if (err)
+ goto out;
+ }
+
+ if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
+ ksmbd_debug(SMB, "User does not have write permission\n");
+ err = -EACCES;
+ goto out;
+ }
+
+ fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
+ if (!fp) {
+ err = -ENOENT;
+ goto out;
+ }
+
+ if (!(fp->daccess & (FILE_WRITE_DATA_LE | FILE_READ_ATTRIBUTES_LE))) {
+ pr_err("Not permitted to write : 0x%x\n", fp->daccess);
+ err = -EACCES;
+ goto out;
+ }
+
+ if (length > max_write_size) {
+ ksmbd_debug(SMB, "limiting write size to max size(%u)\n",
+ max_write_size);
+ err = -EINVAL;
+ goto out;
+ }
+
+ ksmbd_debug(SMB, "flags %u\n", le32_to_cpu(req->Flags));
+ if (le32_to_cpu(req->Flags) & SMB2_WRITEFLAG_WRITE_THROUGH)
+ writethrough = true;
+
+ if (is_rdma_channel == false) {
+ if (le16_to_cpu(req->DataOffset) <
+ offsetof(struct smb2_write_req, Buffer)) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ data_buf = (char *)(((char *)&req->hdr.ProtocolId) +
+ le16_to_cpu(req->DataOffset));
+
+ ksmbd_debug(SMB, "filename %pD, offset %lld, len %zu\n",
+ fp->filp, offset, length);
+ err = ksmbd_vfs_write(work, fp, data_buf, length, &offset,
+ writethrough, &nbytes);
+ if (err < 0)
+ goto out;
+ } else {
+ /* read data from the client using rdma channel, and
+ * write the data.
+ */
+ nbytes = smb2_write_rdma_channel(work, req, fp, offset, length,
+ writethrough);
+ if (nbytes < 0) {
+ err = (int)nbytes;
+ goto out;
+ }
+ }
+
+ rsp->StructureSize = cpu_to_le16(17);
+ rsp->DataOffset = 0;
+ rsp->Reserved = 0;
+ rsp->DataLength = cpu_to_le32(nbytes);
+ rsp->DataRemaining = 0;
+ rsp->Reserved2 = 0;
+ err = ksmbd_iov_pin_rsp(work, rsp, offsetof(struct smb2_write_rsp, Buffer));
+ if (err)
+ goto out;
+ ksmbd_fd_put(work, fp);
+ return 0;
+
+out:
+ if (err == -EAGAIN)
+ rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
+ else if (err == -ENOSPC || err == -EFBIG)
+ rsp->hdr.Status = STATUS_DISK_FULL;
+ else if (err == -ENOENT)
+ rsp->hdr.Status = STATUS_FILE_CLOSED;
+ else if (err == -EACCES)
+ rsp->hdr.Status = STATUS_ACCESS_DENIED;
+ else if (err == -ESHARE)
+ rsp->hdr.Status = STATUS_SHARING_VIOLATION;
+ else if (err == -EINVAL)
+ rsp->hdr.Status = STATUS_INVALID_PARAMETER;
+ else
+ rsp->hdr.Status = STATUS_INVALID_HANDLE;
+
+ smb2_set_err_rsp(work);
+ ksmbd_fd_put(work, fp);
+ return err;
+}
+
+/**
+ * smb2_flush() - handler for smb2 flush file - fsync
+ * @work: smb work containing flush command buffer
+ *
+ * Return: 0 on success, otherwise error
+ */
+int smb2_flush(struct ksmbd_work *work)
+{
+ struct smb2_flush_req *req;
+ struct smb2_flush_rsp *rsp;
+ int err;
+
+ WORK_BUFFERS(work, req, rsp);
+
+ ksmbd_debug(SMB, "SMB2_FLUSH called for fid %llu\n", req->VolatileFileId);
+
+ err = ksmbd_vfs_fsync(work, req->VolatileFileId, req->PersistentFileId);
+ if (err)
+ goto out;
+
+ rsp->StructureSize = cpu_to_le16(4);
+ rsp->Reserved = 0;
+ return ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_flush_rsp));
+
+out:
+ rsp->hdr.Status = STATUS_INVALID_HANDLE;
+ smb2_set_err_rsp(work);
+ return err;
+}
+
+/**
+ * smb2_cancel() - handler for smb2 cancel command
+ * @work: smb work containing cancel command buffer
+ *
+ * Return: 0 on success, otherwise error
+ */
+int smb2_cancel(struct ksmbd_work *work)
+{
+ struct ksmbd_conn *conn = work->conn;
+ struct smb2_hdr *hdr = smb2_get_msg(work->request_buf);
+ struct smb2_hdr *chdr;
+ struct ksmbd_work *iter;
+ struct list_head *command_list;
+
+ if (work->next_smb2_rcv_hdr_off)
+ hdr = ksmbd_resp_buf_next(work);
+
+ ksmbd_debug(SMB, "smb2 cancel called on mid %llu, async flags 0x%x\n",
+ hdr->MessageId, hdr->Flags);
+
+ if (hdr->Flags & SMB2_FLAGS_ASYNC_COMMAND) {
+ command_list = &conn->async_requests;
+
+ spin_lock(&conn->request_lock);
+ list_for_each_entry(iter, command_list,
+ async_request_entry) {
+ chdr = smb2_get_msg(iter->request_buf);
+
+ if (iter->async_id !=
+ le64_to_cpu(hdr->Id.AsyncId))
+ continue;
+
+ ksmbd_debug(SMB,
+ "smb2 with AsyncId %llu cancelled command = 0x%x\n",
+ le64_to_cpu(hdr->Id.AsyncId),
+ le16_to_cpu(chdr->Command));
+ iter->state = KSMBD_WORK_CANCELLED;
+ if (iter->cancel_fn)
+ iter->cancel_fn(iter->cancel_argv);
+ break;
+ }
+ spin_unlock(&conn->request_lock);
+ } else {
+ command_list = &conn->requests;
+
+ spin_lock(&conn->request_lock);
+ list_for_each_entry(iter, command_list, request_entry) {
+ chdr = smb2_get_msg(iter->request_buf);
+
+ if (chdr->MessageId != hdr->MessageId ||
+ iter == work)
+ continue;
+
+ ksmbd_debug(SMB,
+ "smb2 with mid %llu cancelled command = 0x%x\n",
+ le64_to_cpu(hdr->MessageId),
+ le16_to_cpu(chdr->Command));
+ iter->state = KSMBD_WORK_CANCELLED;
+ break;
+ }
+ spin_unlock(&conn->request_lock);
+ }
+
+ /* For SMB2_CANCEL command itself send no response*/
+ work->send_no_response = 1;
+ return 0;
+}
+
+struct file_lock *smb_flock_init(struct file *f)
+{
+ struct file_lock *fl;
+
+ fl = locks_alloc_lock();
+ if (!fl)
+ goto out;
+
+ locks_init_lock(fl);
+
+ fl->fl_owner = f;
+ fl->fl_pid = current->tgid;
+ fl->fl_file = f;
+ fl->fl_flags = FL_POSIX;
+ fl->fl_ops = NULL;
+ fl->fl_lmops = NULL;
+
+out:
+ return fl;
+}
+
+static int smb2_set_flock_flags(struct file_lock *flock, int flags)
+{
+ int cmd = -EINVAL;
+
+ /* Checking for wrong flag combination during lock request*/
+ switch (flags) {
+ case SMB2_LOCKFLAG_SHARED:
+ ksmbd_debug(SMB, "received shared request\n");
+ cmd = F_SETLKW;
+ flock->fl_type = F_RDLCK;
+ flock->fl_flags |= FL_SLEEP;
+ break;
+ case SMB2_LOCKFLAG_EXCLUSIVE:
+ ksmbd_debug(SMB, "received exclusive request\n");
+ cmd = F_SETLKW;
+ flock->fl_type = F_WRLCK;
+ flock->fl_flags |= FL_SLEEP;
+ break;
+ case SMB2_LOCKFLAG_SHARED | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
+ ksmbd_debug(SMB,
+ "received shared & fail immediately request\n");
+ cmd = F_SETLK;
+ flock->fl_type = F_RDLCK;
+ break;
+ case SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_FAIL_IMMEDIATELY:
+ ksmbd_debug(SMB,
+ "received exclusive & fail immediately request\n");
+ cmd = F_SETLK;
+ flock->fl_type = F_WRLCK;
+ break;
+ case SMB2_LOCKFLAG_UNLOCK:
+ ksmbd_debug(SMB, "received unlock request\n");
+ flock->fl_type = F_UNLCK;
+ cmd = F_SETLK;
+ break;
+ }
+
+ return cmd;
+}
+
+static struct ksmbd_lock *smb2_lock_init(struct file_lock *flock,
+ unsigned int cmd, int flags,
+ struct list_head *lock_list)
+{
+ struct ksmbd_lock *lock;
+
+ lock = kzalloc(sizeof(struct ksmbd_lock), GFP_KERNEL);
+ if (!lock)
+ return NULL;
+
+ lock->cmd = cmd;
+ lock->fl = flock;
+ lock->start = flock->fl_start;
+ lock->end = flock->fl_end;
+ lock->flags = flags;
+ if (lock->start == lock->end)
+ lock->zero_len = 1;
+ INIT_LIST_HEAD(&lock->clist);
+ INIT_LIST_HEAD(&lock->flist);
+ INIT_LIST_HEAD(&lock->llist);
+ list_add_tail(&lock->llist, lock_list);
+
+ return lock;
+}
+
+static void smb2_remove_blocked_lock(void **argv)
+{
+ struct file_lock *flock = (struct file_lock *)argv[0];
+
+ ksmbd_vfs_posix_lock_unblock(flock);
+ wake_up(&flock->fl_wait);
+}
+
+static inline bool lock_defer_pending(struct file_lock *fl)
+{
+ /* check pending lock waiters */
+ return waitqueue_active(&fl->fl_wait);
+}
+
+/**
+ * smb2_lock() - handler for smb2 file lock command
+ * @work: smb work containing lock command buffer
+ *
+ * Return: 0 on success, otherwise error
+ */
+int smb2_lock(struct ksmbd_work *work)
+{
+ struct smb2_lock_req *req;
+ struct smb2_lock_rsp *rsp;
+ struct smb2_lock_element *lock_ele;
+ struct ksmbd_file *fp = NULL;
+ struct file_lock *flock = NULL;
+ struct file *filp = NULL;
+ int lock_count;
+ int flags = 0;
+ int cmd = 0;
+ int err = -EIO, i, rc = 0;
+ u64 lock_start, lock_length;
+ struct ksmbd_lock *smb_lock = NULL, *cmp_lock, *tmp, *tmp2;
+ struct ksmbd_conn *conn;
+ int nolock = 0;
+ LIST_HEAD(lock_list);
+ LIST_HEAD(rollback_list);
+ int prior_lock = 0;
+
+ WORK_BUFFERS(work, req, rsp);
+
+ ksmbd_debug(SMB, "Received lock request\n");
+ fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
+ if (!fp) {
+ ksmbd_debug(SMB, "Invalid file id for lock : %llu\n", req->VolatileFileId);
+ err = -ENOENT;
+ goto out2;
+ }
+
+ filp = fp->filp;
+ lock_count = le16_to_cpu(req->LockCount);
+ lock_ele = req->locks;
+
+ ksmbd_debug(SMB, "lock count is %d\n", lock_count);
+ if (!lock_count) {
+ err = -EINVAL;
+ goto out2;
+ }
+
+ for (i = 0; i < lock_count; i++) {
+ flags = le32_to_cpu(lock_ele[i].Flags);
+
+ flock = smb_flock_init(filp);
+ if (!flock)
+ goto out;
+
+ cmd = smb2_set_flock_flags(flock, flags);
+
+ lock_start = le64_to_cpu(lock_ele[i].Offset);
+ lock_length = le64_to_cpu(lock_ele[i].Length);
+ if (lock_start > U64_MAX - lock_length) {
+ pr_err("Invalid lock range requested\n");
+ rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
+ locks_free_lock(flock);
+ goto out;
+ }
+
+ if (lock_start > OFFSET_MAX)
+ flock->fl_start = OFFSET_MAX;
+ else
+ flock->fl_start = lock_start;
+
+ lock_length = le64_to_cpu(lock_ele[i].Length);
+ if (lock_length > OFFSET_MAX - flock->fl_start)
+ lock_length = OFFSET_MAX - flock->fl_start;
+
+ flock->fl_end = flock->fl_start + lock_length;
+
+ if (flock->fl_end < flock->fl_start) {
+ ksmbd_debug(SMB,
+ "the end offset(%llx) is smaller than the start offset(%llx)\n",
+ flock->fl_end, flock->fl_start);
+ rsp->hdr.Status = STATUS_INVALID_LOCK_RANGE;
+ locks_free_lock(flock);
+ goto out;
+ }
+
+ /* Check conflict locks in one request */
+ list_for_each_entry(cmp_lock, &lock_list, llist) {
+ if (cmp_lock->fl->fl_start <= flock->fl_start &&
+ cmp_lock->fl->fl_end >= flock->fl_end) {
+ if (cmp_lock->fl->fl_type != F_UNLCK &&
+ flock->fl_type != F_UNLCK) {
+ pr_err("conflict two locks in one request\n");
+ err = -EINVAL;
+ locks_free_lock(flock);
+ goto out;
+ }
+ }
+ }
+
+ smb_lock = smb2_lock_init(flock, cmd, flags, &lock_list);
+ if (!smb_lock) {
+ err = -EINVAL;
+ locks_free_lock(flock);
+ goto out;
+ }
+ }
+
+ list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
+ if (smb_lock->cmd < 0) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ if (!(smb_lock->flags & SMB2_LOCKFLAG_MASK)) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ if ((prior_lock & (SMB2_LOCKFLAG_EXCLUSIVE | SMB2_LOCKFLAG_SHARED) &&
+ smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) ||
+ (prior_lock == SMB2_LOCKFLAG_UNLOCK &&
+ !(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK))) {
+ err = -EINVAL;
+ goto out;
+ }
+
+ prior_lock = smb_lock->flags;
+
+ if (!(smb_lock->flags & SMB2_LOCKFLAG_UNLOCK) &&
+ !(smb_lock->flags & SMB2_LOCKFLAG_FAIL_IMMEDIATELY))
+ goto no_check_cl;
+
+ nolock = 1;
+ /* check locks in connection list */
+ down_read(&conn_list_lock);
+ list_for_each_entry(conn, &conn_list, conns_list) {
+ spin_lock(&conn->llist_lock);
+ list_for_each_entry_safe(cmp_lock, tmp2, &conn->lock_list, clist) {
+ if (file_inode(cmp_lock->fl->fl_file) !=
+ file_inode(smb_lock->fl->fl_file))
+ continue;
+
+ if (smb_lock->fl->fl_type == F_UNLCK) {
+ if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file &&
+ cmp_lock->start == smb_lock->start &&
+ cmp_lock->end == smb_lock->end &&
+ !lock_defer_pending(cmp_lock->fl)) {
+ nolock = 0;
+ list_del(&cmp_lock->flist);
+ list_del(&cmp_lock->clist);
+ spin_unlock(&conn->llist_lock);
+ up_read(&conn_list_lock);
+
+ locks_free_lock(cmp_lock->fl);
+ kfree(cmp_lock);
+ goto out_check_cl;
+ }
+ continue;
+ }
+
+ if (cmp_lock->fl->fl_file == smb_lock->fl->fl_file) {
+ if (smb_lock->flags & SMB2_LOCKFLAG_SHARED)
+ continue;
+ } else {
+ if (cmp_lock->flags & SMB2_LOCKFLAG_SHARED)
+ continue;
+ }
+
+ /* check zero byte lock range */
+ if (cmp_lock->zero_len && !smb_lock->zero_len &&
+ cmp_lock->start > smb_lock->start &&
+ cmp_lock->start < smb_lock->end) {
+ spin_unlock(&conn->llist_lock);
+ up_read(&conn_list_lock);
+ pr_err("previous lock conflict with zero byte lock range\n");
+ goto out;
+ }
+
+ if (smb_lock->zero_len && !cmp_lock->zero_len &&
+ smb_lock->start > cmp_lock->start &&
+ smb_lock->start < cmp_lock->end) {
+ spin_unlock(&conn->llist_lock);
+ up_read(&conn_list_lock);
+ pr_err("current lock conflict with zero byte lock range\n");
+ goto out;
+ }
+
+ if (((cmp_lock->start <= smb_lock->start &&
+ cmp_lock->end > smb_lock->start) ||
+ (cmp_lock->start < smb_lock->end &&
+ cmp_lock->end >= smb_lock->end)) &&
+ !cmp_lock->zero_len && !smb_lock->zero_len) {
+ spin_unlock(&conn->llist_lock);
+ up_read(&conn_list_lock);
+ pr_err("Not allow lock operation on exclusive lock range\n");
+ goto out;
+ }
+ }
+ spin_unlock(&conn->llist_lock);
+ }
+ up_read(&conn_list_lock);
+out_check_cl:
+ if (smb_lock->fl->fl_type == F_UNLCK && nolock) {
+ pr_err("Try to unlock nolocked range\n");
+ rsp->hdr.Status = STATUS_RANGE_NOT_LOCKED;
+ goto out;
+ }
+
+no_check_cl:
+ if (smb_lock->zero_len) {
+ err = 0;
+ goto skip;
+ }
+
+ flock = smb_lock->fl;
+ list_del(&smb_lock->llist);
+retry:
+ rc = vfs_lock_file(filp, smb_lock->cmd, flock, NULL);
+skip:
+ if (flags & SMB2_LOCKFLAG_UNLOCK) {
+ if (!rc) {
+ ksmbd_debug(SMB, "File unlocked\n");
+ } else if (rc == -ENOENT) {
+ rsp->hdr.Status = STATUS_NOT_LOCKED;
+ goto out;
+ }
+ locks_free_lock(flock);
+ kfree(smb_lock);
+ } else {
+ if (rc == FILE_LOCK_DEFERRED) {
+ void **argv;
+
+ ksmbd_debug(SMB,
+ "would have to wait for getting lock\n");
+ list_add(&smb_lock->llist, &rollback_list);
+
+ argv = kmalloc(sizeof(void *), GFP_KERNEL);
+ if (!argv) {
+ err = -ENOMEM;
+ goto out;
+ }
+ argv[0] = flock;
+
+ rc = setup_async_work(work,
+ smb2_remove_blocked_lock,
+ argv);
+ if (rc) {
+ kfree(argv);
+ err = -ENOMEM;
+ goto out;
+ }
+ spin_lock(&fp->f_lock);
+ list_add(&work->fp_entry, &fp->blocked_works);
+ spin_unlock(&fp->f_lock);
+
+ smb2_send_interim_resp(work, STATUS_PENDING);
+
+ ksmbd_vfs_posix_lock_wait(flock);
+
+ spin_lock(&fp->f_lock);
+ list_del(&work->fp_entry);
+ spin_unlock(&fp->f_lock);
+
+ if (work->state != KSMBD_WORK_ACTIVE) {
+ list_del(&smb_lock->llist);
+ locks_free_lock(flock);
+
+ if (work->state == KSMBD_WORK_CANCELLED) {
+ rsp->hdr.Status =
+ STATUS_CANCELLED;
+ kfree(smb_lock);
+ smb2_send_interim_resp(work,
+ STATUS_CANCELLED);
+ work->send_no_response = 1;
+ goto out;
+ }
+
+ rsp->hdr.Status =
+ STATUS_RANGE_NOT_LOCKED;
+ kfree(smb_lock);
+ goto out2;
+ }
+
+ list_del(&smb_lock->llist);
+ release_async_work(work);
+ goto retry;
+ } else if (!rc) {
+ list_add(&smb_lock->llist, &rollback_list);
+ spin_lock(&work->conn->llist_lock);
+ list_add_tail(&smb_lock->clist,
+ &work->conn->lock_list);
+ list_add_tail(&smb_lock->flist,
+ &fp->lock_list);
+ spin_unlock(&work->conn->llist_lock);
+ ksmbd_debug(SMB, "successful in taking lock\n");
+ } else {
+ goto out;
+ }
+ }
+ }
+
+ if (atomic_read(&fp->f_ci->op_count) > 1)
+ smb_break_all_oplock(work, fp);
+
+ rsp->StructureSize = cpu_to_le16(4);
+ ksmbd_debug(SMB, "successful in taking lock\n");
+ rsp->hdr.Status = STATUS_SUCCESS;
+ rsp->Reserved = 0;
+ err = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lock_rsp));
+ if (err)
+ goto out;
+
+ ksmbd_fd_put(work, fp);
+ return 0;
+
+out:
+ list_for_each_entry_safe(smb_lock, tmp, &lock_list, llist) {
+ locks_free_lock(smb_lock->fl);
+ list_del(&smb_lock->llist);
+ kfree(smb_lock);
+ }
+
+ list_for_each_entry_safe(smb_lock, tmp, &rollback_list, llist) {
+ struct file_lock *rlock = NULL;
+
+ rlock = smb_flock_init(filp);
+ rlock->fl_type = F_UNLCK;
+ rlock->fl_start = smb_lock->start;
+ rlock->fl_end = smb_lock->end;
+
+ rc = vfs_lock_file(filp, F_SETLK, rlock, NULL);
+ if (rc)
+ pr_err("rollback unlock fail : %d\n", rc);
+
+ list_del(&smb_lock->llist);
+ spin_lock(&work->conn->llist_lock);
+ if (!list_empty(&smb_lock->flist))
+ list_del(&smb_lock->flist);
+ list_del(&smb_lock->clist);
+ spin_unlock(&work->conn->llist_lock);
+
+ locks_free_lock(smb_lock->fl);
+ locks_free_lock(rlock);
+ kfree(smb_lock);
+ }
+out2:
+ ksmbd_debug(SMB, "failed in taking lock(flags : %x), err : %d\n", flags, err);
+
+ if (!rsp->hdr.Status) {
+ if (err == -EINVAL)
+ rsp->hdr.Status = STATUS_INVALID_PARAMETER;
+ else if (err == -ENOMEM)
+ rsp->hdr.Status = STATUS_INSUFFICIENT_RESOURCES;
+ else if (err == -ENOENT)
+ rsp->hdr.Status = STATUS_FILE_CLOSED;
+ else
+ rsp->hdr.Status = STATUS_LOCK_NOT_GRANTED;
+ }
+
+ smb2_set_err_rsp(work);
+ ksmbd_fd_put(work, fp);
+ return err;
+}
+
+static int fsctl_copychunk(struct ksmbd_work *work,
+ struct copychunk_ioctl_req *ci_req,
+ unsigned int cnt_code,
+ unsigned int input_count,
+ unsigned long long volatile_id,
+ unsigned long long persistent_id,
+ struct smb2_ioctl_rsp *rsp)
+{
+ struct copychunk_ioctl_rsp *ci_rsp;
+ struct ksmbd_file *src_fp = NULL, *dst_fp = NULL;
+ struct srv_copychunk *chunks;
+ unsigned int i, chunk_count, chunk_count_written = 0;
+ unsigned int chunk_size_written = 0;
+ loff_t total_size_written = 0;
+ int ret = 0;
+
+ ci_rsp = (struct copychunk_ioctl_rsp *)&rsp->Buffer[0];
+
+ rsp->VolatileFileId = volatile_id;
+ rsp->PersistentFileId = persistent_id;
+ ci_rsp->ChunksWritten =
+ cpu_to_le32(ksmbd_server_side_copy_max_chunk_count());
+ ci_rsp->ChunkBytesWritten =
+ cpu_to_le32(ksmbd_server_side_copy_max_chunk_size());
+ ci_rsp->TotalBytesWritten =
+ cpu_to_le32(ksmbd_server_side_copy_max_total_size());
+
+ chunks = (struct srv_copychunk *)&ci_req->Chunks[0];
+ chunk_count = le32_to_cpu(ci_req->ChunkCount);
+ if (chunk_count == 0)
+ goto out;
+ total_size_written = 0;
+
+ /* verify the SRV_COPYCHUNK_COPY packet */
+ if (chunk_count > ksmbd_server_side_copy_max_chunk_count() ||
+ input_count < offsetof(struct copychunk_ioctl_req, Chunks) +
+ chunk_count * sizeof(struct srv_copychunk)) {
+ rsp->hdr.Status = STATUS_INVALID_PARAMETER;
+ return -EINVAL;
+ }
+
+ for (i = 0; i < chunk_count; i++) {
+ if (le32_to_cpu(chunks[i].Length) == 0 ||
+ le32_to_cpu(chunks[i].Length) > ksmbd_server_side_copy_max_chunk_size())
+ break;
+ total_size_written += le32_to_cpu(chunks[i].Length);
+ }
+
+ if (i < chunk_count ||
+ total_size_written > ksmbd_server_side_copy_max_total_size()) {
+ rsp->hdr.Status = STATUS_INVALID_PARAMETER;
+ return -EINVAL;
+ }
+
+ src_fp = ksmbd_lookup_foreign_fd(work,
+ le64_to_cpu(ci_req->ResumeKey[0]));
+ dst_fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
+ ret = -EINVAL;
+ if (!src_fp ||
+ src_fp->persistent_id != le64_to_cpu(ci_req->ResumeKey[1])) {
+ rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
+ goto out;
+ }
+
+ if (!dst_fp) {
+ rsp->hdr.Status = STATUS_FILE_CLOSED;
+ goto out;
+ }
+
+ /*
+ * FILE_READ_DATA should only be included in
+ * the FSCTL_COPYCHUNK case
+ */
+ if (cnt_code == FSCTL_COPYCHUNK &&
+ !(dst_fp->daccess & (FILE_READ_DATA_LE | FILE_GENERIC_READ_LE))) {
+ rsp->hdr.Status = STATUS_ACCESS_DENIED;
+ goto out;
+ }
+
+ ret = ksmbd_vfs_copy_file_ranges(work, src_fp, dst_fp,
+ chunks, chunk_count,
+ &chunk_count_written,
+ &chunk_size_written,
+ &total_size_written);
+ if (ret < 0) {
+ if (ret == -EACCES)
+ rsp->hdr.Status = STATUS_ACCESS_DENIED;
+ if (ret == -EAGAIN)
+ rsp->hdr.Status = STATUS_FILE_LOCK_CONFLICT;
+ else if (ret == -EBADF)
+ rsp->hdr.Status = STATUS_INVALID_HANDLE;
+ else if (ret == -EFBIG || ret == -ENOSPC)
+ rsp->hdr.Status = STATUS_DISK_FULL;
+ else if (ret == -EINVAL)
+ rsp->hdr.Status = STATUS_INVALID_PARAMETER;
+ else if (ret == -EISDIR)
+ rsp->hdr.Status = STATUS_FILE_IS_A_DIRECTORY;
+ else if (ret == -E2BIG)
+ rsp->hdr.Status = STATUS_INVALID_VIEW_SIZE;
+ else
+ rsp->hdr.Status = STATUS_UNEXPECTED_IO_ERROR;
+ }
+
+ ci_rsp->ChunksWritten = cpu_to_le32(chunk_count_written);
+ ci_rsp->ChunkBytesWritten = cpu_to_le32(chunk_size_written);
+ ci_rsp->TotalBytesWritten = cpu_to_le32(total_size_written);
+out:
+ ksmbd_fd_put(work, src_fp);
+ ksmbd_fd_put(work, dst_fp);
+ return ret;
+}
+
+static __be32 idev_ipv4_address(struct in_device *idev)
+{
+ __be32 addr = 0;
+
+ struct in_ifaddr *ifa;
+
+ rcu_read_lock();
+ in_dev_for_each_ifa_rcu(ifa, idev) {
+ if (ifa->ifa_flags & IFA_F_SECONDARY)
+ continue;
+
+ addr = ifa->ifa_address;
+ break;
+ }
+ rcu_read_unlock();
+ return addr;
+}
+
+static int fsctl_query_iface_info_ioctl(struct ksmbd_conn *conn,
+ struct smb2_ioctl_rsp *rsp,
+ unsigned int out_buf_len)
+{
+ struct network_interface_info_ioctl_rsp *nii_rsp = NULL;
+ int nbytes = 0;
+ struct net_device *netdev;
+ struct sockaddr_storage_rsp *sockaddr_storage;
+ unsigned int flags;
+ unsigned long long speed;
+
+ rtnl_lock();
+ for_each_netdev(&init_net, netdev) {
+ bool ipv4_set = false;
+
+ if (netdev->type == ARPHRD_LOOPBACK)
+ continue;
+
+ flags = dev_get_flags(netdev);
+ if (!(flags & IFF_RUNNING))
+ continue;
+ipv6_retry:
+ if (out_buf_len <
+ nbytes + sizeof(struct network_interface_info_ioctl_rsp)) {
+ rtnl_unlock();
+ return -ENOSPC;
+ }
+
+ nii_rsp = (struct network_interface_info_ioctl_rsp *)
+ &rsp->Buffer[nbytes];
+ nii_rsp->IfIndex = cpu_to_le32(netdev->ifindex);
+
+ nii_rsp->Capability = 0;
+ if (netdev->real_num_tx_queues > 1)
+ nii_rsp->Capability |= cpu_to_le32(RSS_CAPABLE);
+ if (ksmbd_rdma_capable_netdev(netdev))
+ nii_rsp->Capability |= cpu_to_le32(RDMA_CAPABLE);
+
+ nii_rsp->Next = cpu_to_le32(152);
+ nii_rsp->Reserved = 0;
+
+ if (netdev->ethtool_ops->get_link_ksettings) {
+ struct ethtool_link_ksettings cmd;
+
+ netdev->ethtool_ops->get_link_ksettings(netdev, &cmd);
+ speed = cmd.base.speed;
+ } else {
+ ksmbd_debug(SMB, "%s %s\n", netdev->name,
+ "speed is unknown, defaulting to 1Gb/sec");
+ speed = SPEED_1000;
+ }
+
+ speed *= 1000000;
+ nii_rsp->LinkSpeed = cpu_to_le64(speed);
+
+ sockaddr_storage = (struct sockaddr_storage_rsp *)
+ nii_rsp->SockAddr_Storage;
+ memset(sockaddr_storage, 0, 128);
+
+ if (!ipv4_set) {
+ struct in_device *idev;
+
+ sockaddr_storage->Family = cpu_to_le16(INTERNETWORK);
+ sockaddr_storage->addr4.Port = 0;
+
+ idev = __in_dev_get_rtnl(netdev);
+ if (!idev)
+ continue;
+ sockaddr_storage->addr4.IPv4address =
+ idev_ipv4_address(idev);
+ nbytes += sizeof(struct network_interface_info_ioctl_rsp);
+ ipv4_set = true;
+ goto ipv6_retry;
+ } else {
+ struct inet6_dev *idev6;
+ struct inet6_ifaddr *ifa;
+ __u8 *ipv6_addr = sockaddr_storage->addr6.IPv6address;
+
+ sockaddr_storage->Family = cpu_to_le16(INTERNETWORKV6);
+ sockaddr_storage->addr6.Port = 0;
+ sockaddr_storage->addr6.FlowInfo = 0;
+
+ idev6 = __in6_dev_get(netdev);
+ if (!idev6)
+ continue;
+
+ list_for_each_entry(ifa, &idev6->addr_list, if_list) {
+ if (ifa->flags & (IFA_F_TENTATIVE |
+ IFA_F_DEPRECATED))
+ continue;
+ memcpy(ipv6_addr, ifa->addr.s6_addr, 16);
+ break;
+ }
+ sockaddr_storage->addr6.ScopeId = 0;
+ nbytes += sizeof(struct network_interface_info_ioctl_rsp);
+ }
+ }
+ rtnl_unlock();
+
+ /* zero if this is last one */
+ if (nii_rsp)
+ nii_rsp->Next = 0;
+
+ rsp->PersistentFileId = SMB2_NO_FID;
+ rsp->VolatileFileId = SMB2_NO_FID;
+ return nbytes;
+}
+
+static int fsctl_validate_negotiate_info(struct ksmbd_conn *conn,
+ struct validate_negotiate_info_req *neg_req,
+ struct validate_negotiate_info_rsp *neg_rsp,
+ unsigned int in_buf_len)
+{
+ int ret = 0;
+ int dialect;
+
+ if (in_buf_len < offsetof(struct validate_negotiate_info_req, Dialects) +
+ le16_to_cpu(neg_req->DialectCount) * sizeof(__le16))
+ return -EINVAL;
+
+ dialect = ksmbd_lookup_dialect_by_id(neg_req->Dialects,
+ neg_req->DialectCount);
+ if (dialect == BAD_PROT_ID || dialect != conn->dialect) {
+ ret = -EINVAL;
+ goto err_out;
+ }
+
+ if (strncmp(neg_req->Guid, conn->ClientGUID, SMB2_CLIENT_GUID_SIZE)) {
+ ret = -EINVAL;
+ goto err_out;
+ }
+
+ if (le16_to_cpu(neg_req->SecurityMode) != conn->cli_sec_mode) {
+ ret = -EINVAL;
+ goto err_out;
+ }
+
+ if (le32_to_cpu(neg_req->Capabilities) != conn->cli_cap) {
+ ret = -EINVAL;
+ goto err_out;
+ }
+
+ neg_rsp->Capabilities = cpu_to_le32(conn->vals->capabilities);
+ memset(neg_rsp->Guid, 0, SMB2_CLIENT_GUID_SIZE);
+ neg_rsp->SecurityMode = cpu_to_le16(conn->srv_sec_mode);
+ neg_rsp->Dialect = cpu_to_le16(conn->dialect);
+err_out:
+ return ret;
+}
+
+static int fsctl_query_allocated_ranges(struct ksmbd_work *work, u64 id,
+ struct file_allocated_range_buffer *qar_req,
+ struct file_allocated_range_buffer *qar_rsp,
+ unsigned int in_count, unsigned int *out_count)
+{
+ struct ksmbd_file *fp;
+ loff_t start, length;
+ int ret = 0;
+
+ *out_count = 0;
+ if (in_count == 0)
+ return -EINVAL;
+
+ start = le64_to_cpu(qar_req->file_offset);
+ length = le64_to_cpu(qar_req->length);
+
+ if (start < 0 || length < 0)
+ return -EINVAL;
+
+ fp = ksmbd_lookup_fd_fast(work, id);
+ if (!fp)
+ return -ENOENT;
+
+ ret = ksmbd_vfs_fqar_lseek(fp, start, length,
+ qar_rsp, in_count, out_count);
+ if (ret && ret != -E2BIG)
+ *out_count = 0;
+
+ ksmbd_fd_put(work, fp);
+ return ret;
+}
+
+static int fsctl_pipe_transceive(struct ksmbd_work *work, u64 id,
+ unsigned int out_buf_len,
+ struct smb2_ioctl_req *req,
+ struct smb2_ioctl_rsp *rsp)
+{
+ struct ksmbd_rpc_command *rpc_resp;
+ char *data_buf = (char *)&req->Buffer[0];
+ int nbytes = 0;
+
+ rpc_resp = ksmbd_rpc_ioctl(work->sess, id, data_buf,
+ le32_to_cpu(req->InputCount));
+ if (rpc_resp) {
+ if (rpc_resp->flags == KSMBD_RPC_SOME_NOT_MAPPED) {
+ /*
+ * set STATUS_SOME_NOT_MAPPED response
+ * for unknown domain sid.
+ */
+ rsp->hdr.Status = STATUS_SOME_NOT_MAPPED;
+ } else if (rpc_resp->flags == KSMBD_RPC_ENOTIMPLEMENTED) {
+ rsp->hdr.Status = STATUS_NOT_SUPPORTED;
+ goto out;
+ } else if (rpc_resp->flags != KSMBD_RPC_OK) {
+ rsp->hdr.Status = STATUS_INVALID_PARAMETER;
+ goto out;
+ }
+
+ nbytes = rpc_resp->payload_sz;
+ if (rpc_resp->payload_sz > out_buf_len) {
+ rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
+ nbytes = out_buf_len;
+ }
+
+ if (!rpc_resp->payload_sz) {
+ rsp->hdr.Status =
+ STATUS_UNEXPECTED_IO_ERROR;
+ goto out;
+ }
+
+ memcpy((char *)rsp->Buffer, rpc_resp->payload, nbytes);
+ }
+out:
+ kvfree(rpc_resp);
+ return nbytes;
+}
+
+static inline int fsctl_set_sparse(struct ksmbd_work *work, u64 id,
+ struct file_sparse *sparse)
+{
+ struct ksmbd_file *fp;
+ struct mnt_idmap *idmap;
+ int ret = 0;
+ __le32 old_fattr;
+
+ fp = ksmbd_lookup_fd_fast(work, id);
+ if (!fp)
+ return -ENOENT;
+ idmap = file_mnt_idmap(fp->filp);
+
+ old_fattr = fp->f_ci->m_fattr;
+ if (sparse->SetSparse)
+ fp->f_ci->m_fattr |= FILE_ATTRIBUTE_SPARSE_FILE_LE;
+ else
+ fp->f_ci->m_fattr &= ~FILE_ATTRIBUTE_SPARSE_FILE_LE;
+
+ if (fp->f_ci->m_fattr != old_fattr &&
+ test_share_config_flag(work->tcon->share_conf,
+ KSMBD_SHARE_FLAG_STORE_DOS_ATTRS)) {
+ struct xattr_dos_attrib da;
+
+ ret = ksmbd_vfs_get_dos_attrib_xattr(idmap,
+ fp->filp->f_path.dentry, &da);
+ if (ret <= 0)
+ goto out;
+
+ da.attr = le32_to_cpu(fp->f_ci->m_fattr);
+ ret = ksmbd_vfs_set_dos_attrib_xattr(idmap,
+ &fp->filp->f_path,
+ &da, true);
+ if (ret)
+ fp->f_ci->m_fattr = old_fattr;
+ }
+
+out:
+ ksmbd_fd_put(work, fp);
+ return ret;
+}
+
+static int fsctl_request_resume_key(struct ksmbd_work *work,
+ struct smb2_ioctl_req *req,
+ struct resume_key_ioctl_rsp *key_rsp)
+{
+ struct ksmbd_file *fp;
+
+ fp = ksmbd_lookup_fd_slow(work, req->VolatileFileId, req->PersistentFileId);
+ if (!fp)
+ return -ENOENT;
+
+ memset(key_rsp, 0, sizeof(*key_rsp));
+ key_rsp->ResumeKey[0] = req->VolatileFileId;
+ key_rsp->ResumeKey[1] = req->PersistentFileId;
+ ksmbd_fd_put(work, fp);
+
+ return 0;
+}
+
+/**
+ * smb2_ioctl() - handler for smb2 ioctl command
+ * @work: smb work containing ioctl command buffer
+ *
+ * Return: 0 on success, otherwise error
+ */
+int smb2_ioctl(struct ksmbd_work *work)
+{
+ struct smb2_ioctl_req *req;
+ struct smb2_ioctl_rsp *rsp;
+ unsigned int cnt_code, nbytes = 0, out_buf_len, in_buf_len;
+ u64 id = KSMBD_NO_FID;
+ struct ksmbd_conn *conn = work->conn;
+ int ret = 0;
+
+ if (work->next_smb2_rcv_hdr_off) {
+ req = ksmbd_req_buf_next(work);
+ rsp = ksmbd_resp_buf_next(work);
+ if (!has_file_id(req->VolatileFileId)) {
+ ksmbd_debug(SMB, "Compound request set FID = %llu\n",
+ work->compound_fid);
+ id = work->compound_fid;
+ }
+ } else {
+ req = smb2_get_msg(work->request_buf);
+ rsp = smb2_get_msg(work->response_buf);
+ }
+
+ if (!has_file_id(id))
+ id = req->VolatileFileId;
+
+ if (req->Flags != cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL)) {
+ rsp->hdr.Status = STATUS_NOT_SUPPORTED;
+ goto out;
+ }
+
+ cnt_code = le32_to_cpu(req->CtlCode);
+ ret = smb2_calc_max_out_buf_len(work, 48,
+ le32_to_cpu(req->MaxOutputResponse));
+ if (ret < 0) {
+ rsp->hdr.Status = STATUS_INVALID_PARAMETER;
+ goto out;
+ }
+ out_buf_len = (unsigned int)ret;
+ in_buf_len = le32_to_cpu(req->InputCount);
+
+ switch (cnt_code) {
+ case FSCTL_DFS_GET_REFERRALS:
+ case FSCTL_DFS_GET_REFERRALS_EX:
+ /* Not support DFS yet */
+ rsp->hdr.Status = STATUS_FS_DRIVER_REQUIRED;
+ goto out;
+ case FSCTL_CREATE_OR_GET_OBJECT_ID:
+ {
+ struct file_object_buf_type1_ioctl_rsp *obj_buf;
+
+ nbytes = sizeof(struct file_object_buf_type1_ioctl_rsp);
+ obj_buf = (struct file_object_buf_type1_ioctl_rsp *)
+ &rsp->Buffer[0];
+
+ /*
+ * TODO: This is dummy implementation to pass smbtorture
+ * Need to check correct response later
+ */
+ memset(obj_buf->ObjectId, 0x0, 16);
+ memset(obj_buf->BirthVolumeId, 0x0, 16);
+ memset(obj_buf->BirthObjectId, 0x0, 16);
+ memset(obj_buf->DomainId, 0x0, 16);
+
+ break;
+ }
+ case FSCTL_PIPE_TRANSCEIVE:
+ out_buf_len = min_t(u32, KSMBD_IPC_MAX_PAYLOAD, out_buf_len);
+ nbytes = fsctl_pipe_transceive(work, id, out_buf_len, req, rsp);
+ break;
+ case FSCTL_VALIDATE_NEGOTIATE_INFO:
+ if (conn->dialect < SMB30_PROT_ID) {
+ ret = -EOPNOTSUPP;
+ goto out;
+ }
+
+ if (in_buf_len < offsetof(struct validate_negotiate_info_req,
+ Dialects)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (out_buf_len < sizeof(struct validate_negotiate_info_rsp)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ ret = fsctl_validate_negotiate_info(conn,
+ (struct validate_negotiate_info_req *)&req->Buffer[0],
+ (struct validate_negotiate_info_rsp *)&rsp->Buffer[0],
+ in_buf_len);
+ if (ret < 0)
+ goto out;
+
+ nbytes = sizeof(struct validate_negotiate_info_rsp);
+ rsp->PersistentFileId = SMB2_NO_FID;
+ rsp->VolatileFileId = SMB2_NO_FID;
+ break;
+ case FSCTL_QUERY_NETWORK_INTERFACE_INFO:
+ ret = fsctl_query_iface_info_ioctl(conn, rsp, out_buf_len);
+ if (ret < 0)
+ goto out;
+ nbytes = ret;
+ break;
+ case FSCTL_REQUEST_RESUME_KEY:
+ if (out_buf_len < sizeof(struct resume_key_ioctl_rsp)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ ret = fsctl_request_resume_key(work, req,
+ (struct resume_key_ioctl_rsp *)&rsp->Buffer[0]);
+ if (ret < 0)
+ goto out;
+ rsp->PersistentFileId = req->PersistentFileId;
+ rsp->VolatileFileId = req->VolatileFileId;
+ nbytes = sizeof(struct resume_key_ioctl_rsp);
+ break;
+ case FSCTL_COPYCHUNK:
+ case FSCTL_COPYCHUNK_WRITE:
+ if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
+ ksmbd_debug(SMB,
+ "User does not have write permission\n");
+ ret = -EACCES;
+ goto out;
+ }
+
+ if (in_buf_len < sizeof(struct copychunk_ioctl_req)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ if (out_buf_len < sizeof(struct copychunk_ioctl_rsp)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ nbytes = sizeof(struct copychunk_ioctl_rsp);
+ rsp->VolatileFileId = req->VolatileFileId;
+ rsp->PersistentFileId = req->PersistentFileId;
+ fsctl_copychunk(work,
+ (struct copychunk_ioctl_req *)&req->Buffer[0],
+ le32_to_cpu(req->CtlCode),
+ le32_to_cpu(req->InputCount),
+ req->VolatileFileId,
+ req->PersistentFileId,
+ rsp);
+ break;
+ case FSCTL_SET_SPARSE:
+ if (in_buf_len < sizeof(struct file_sparse)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ ret = fsctl_set_sparse(work, id,
+ (struct file_sparse *)&req->Buffer[0]);
+ if (ret < 0)
+ goto out;
+ break;
+ case FSCTL_SET_ZERO_DATA:
+ {
+ struct file_zero_data_information *zero_data;
+ struct ksmbd_file *fp;
+ loff_t off, len, bfz;
+
+ if (!test_tree_conn_flag(work->tcon, KSMBD_TREE_CONN_FLAG_WRITABLE)) {
+ ksmbd_debug(SMB,
+ "User does not have write permission\n");
+ ret = -EACCES;
+ goto out;
+ }
+
+ if (in_buf_len < sizeof(struct file_zero_data_information)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ zero_data =
+ (struct file_zero_data_information *)&req->Buffer[0];
+
+ off = le64_to_cpu(zero_data->FileOffset);
+ bfz = le64_to_cpu(zero_data->BeyondFinalZero);
+ if (off < 0 || bfz < 0 || off > bfz) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ len = bfz - off;
+ if (len) {
+ fp = ksmbd_lookup_fd_fast(work, id);
+ if (!fp) {
+ ret = -ENOENT;
+ goto out;
+ }
+
+ ret = ksmbd_vfs_zero_data(work, fp, off, len);
+ ksmbd_fd_put(work, fp);
+ if (ret < 0)
+ goto out;
+ }
+ break;
+ }
+ case FSCTL_QUERY_ALLOCATED_RANGES:
+ if (in_buf_len < sizeof(struct file_allocated_range_buffer)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ ret = fsctl_query_allocated_ranges(work, id,
+ (struct file_allocated_range_buffer *)&req->Buffer[0],
+ (struct file_allocated_range_buffer *)&rsp->Buffer[0],
+ out_buf_len /
+ sizeof(struct file_allocated_range_buffer), &nbytes);
+ if (ret == -E2BIG) {
+ rsp->hdr.Status = STATUS_BUFFER_OVERFLOW;
+ } else if (ret < 0) {
+ nbytes = 0;
+ goto out;
+ }
+
+ nbytes *= sizeof(struct file_allocated_range_buffer);
+ break;
+ case FSCTL_GET_REPARSE_POINT:
+ {
+ struct reparse_data_buffer *reparse_ptr;
+ struct ksmbd_file *fp;
+
+ reparse_ptr = (struct reparse_data_buffer *)&rsp->Buffer[0];
+ fp = ksmbd_lookup_fd_fast(work, id);
+ if (!fp) {
+ pr_err("not found fp!!\n");
+ ret = -ENOENT;
+ goto out;
+ }
+
+ reparse_ptr->ReparseTag =
+ smb2_get_reparse_tag_special_file(file_inode(fp->filp)->i_mode);
+ reparse_ptr->ReparseDataLength = 0;
+ ksmbd_fd_put(work, fp);
+ nbytes = sizeof(struct reparse_data_buffer);
+ break;
+ }
+ case FSCTL_DUPLICATE_EXTENTS_TO_FILE:
+ {
+ struct ksmbd_file *fp_in, *fp_out = NULL;
+ struct duplicate_extents_to_file *dup_ext;
+ loff_t src_off, dst_off, length, cloned;
+
+ if (in_buf_len < sizeof(struct duplicate_extents_to_file)) {
+ ret = -EINVAL;
+ goto out;
+ }
+
+ dup_ext = (struct duplicate_extents_to_file *)&req->Buffer[0];
+
+ fp_in = ksmbd_lookup_fd_slow(work, dup_ext->VolatileFileHandle,
+ dup_ext->PersistentFileHandle);
+ if (!fp_in) {
+ pr_err("not found file handle in duplicate extent to file\n");
+ ret = -ENOENT;
+ goto out;
+ }
+
+ fp_out = ksmbd_lookup_fd_fast(work, id);
+ if (!fp_out) {
+ pr_err("not found fp\n");
+ ret = -ENOENT;
+ goto dup_ext_out;
+ }
+
+ src_off = le64_to_cpu(dup_ext->SourceFileOffset);
+ dst_off = le64_to_cpu(dup_ext->TargetFileOffset);
+ length = le64_to_cpu(dup_ext->ByteCount);
+ /*
+ * XXX: It is not clear if FSCTL_DUPLICATE_EXTENTS_TO_FILE
+ * should fall back to vfs_copy_file_range(). This could be
+ * beneficial when re-exporting nfs/smb mount, but note that
+ * this can result in partial copy that returns an error status.
+ * If/when FSCTL_DUPLICATE_EXTENTS_TO_FILE_EX is implemented,
+ * fall back to vfs_copy_file_range(), should be avoided when
+ * the flag DUPLICATE_EXTENTS_DATA_EX_SOURCE_ATOMIC is set.
+ */
+ cloned = vfs_clone_file_range(fp_in->filp, src_off,
+ fp_out->filp, dst_off, length, 0);
+ if (cloned == -EXDEV || cloned == -EOPNOTSUPP) {
+ ret = -EOPNOTSUPP;
+ goto dup_ext_out;
+ } else if (cloned != length) {
+ cloned = vfs_copy_file_range(fp_in->filp, src_off,
+ fp_out->filp, dst_off,
+ length, 0);
+ if (cloned != length) {
+ if (cloned < 0)
+ ret = cloned;
+ else
+ ret = -EINVAL;
+ }
+ }
+
+dup_ext_out:
+ ksmbd_fd_put(work, fp_in);
+ ksmbd_fd_put(work, fp_out);
+ if (ret < 0)
+ goto out;
+ break;
+ }
+ default:
+ ksmbd_debug(SMB, "not implemented yet ioctl command 0x%x\n",
+ cnt_code);
+ ret = -EOPNOTSUPP;
+ goto out;
+ }
+
+ rsp->CtlCode = cpu_to_le32(cnt_code);
+ rsp->InputCount = cpu_to_le32(0);
+ rsp->InputOffset = cpu_to_le32(112);
+ rsp->OutputOffset = cpu_to_le32(112);
+ rsp->OutputCount = cpu_to_le32(nbytes);
+ rsp->StructureSize = cpu_to_le16(49);
+ rsp->Reserved = cpu_to_le16(0);
+ rsp->Flags = cpu_to_le32(0);
+ rsp->Reserved2 = cpu_to_le32(0);
+ ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_ioctl_rsp) + nbytes);
+ if (!ret)
+ return ret;
+
+out:
+ if (ret == -EACCES)
+ rsp->hdr.Status = STATUS_ACCESS_DENIED;
+ else if (ret == -ENOENT)
+ rsp->hdr.Status = STATUS_OBJECT_NAME_NOT_FOUND;
+ else if (ret == -EOPNOTSUPP)
+ rsp->hdr.Status = STATUS_NOT_SUPPORTED;
+ else if (ret == -ENOSPC)
+ rsp->hdr.Status = STATUS_BUFFER_TOO_SMALL;
+ else if (ret < 0 || rsp->hdr.Status == 0)
+ rsp->hdr.Status = STATUS_INVALID_PARAMETER;
+ smb2_set_err_rsp(work);
+ return 0;
+}
+
+/**
+ * smb20_oplock_break_ack() - handler for smb2.0 oplock break command
+ * @work: smb work containing oplock break command buffer
+ *
+ * Return: 0
+ */
+static void smb20_oplock_break_ack(struct ksmbd_work *work)
+{
+ struct smb2_oplock_break *req;
+ struct smb2_oplock_break *rsp;
+ struct ksmbd_file *fp;
+ struct oplock_info *opinfo = NULL;
+ __le32 err = 0;
+ int ret = 0;
+ u64 volatile_id, persistent_id;
+ char req_oplevel = 0, rsp_oplevel = 0;
+ unsigned int oplock_change_type;
+
+ WORK_BUFFERS(work, req, rsp);
+
+ volatile_id = req->VolatileFid;
+ persistent_id = req->PersistentFid;
+ req_oplevel = req->OplockLevel;
+ ksmbd_debug(OPLOCK, "v_id %llu, p_id %llu request oplock level %d\n",
+ volatile_id, persistent_id, req_oplevel);
+
+ fp = ksmbd_lookup_fd_slow(work, volatile_id, persistent_id);
+ if (!fp) {
+ rsp->hdr.Status = STATUS_FILE_CLOSED;
+ smb2_set_err_rsp(work);
+ return;
+ }
+
+ opinfo = opinfo_get(fp);
+ if (!opinfo) {
+ pr_err("unexpected null oplock_info\n");
+ rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
+ smb2_set_err_rsp(work);
+ ksmbd_fd_put(work, fp);
+ return;
+ }
+
+ if (opinfo->level == SMB2_OPLOCK_LEVEL_NONE) {
+ rsp->hdr.Status = STATUS_INVALID_OPLOCK_PROTOCOL;
+ goto err_out;
+ }
+
+ if (opinfo->op_state == OPLOCK_STATE_NONE) {
+ ksmbd_debug(SMB, "unexpected oplock state 0x%x\n", opinfo->op_state);
+ rsp->hdr.Status = STATUS_UNSUCCESSFUL;
+ goto err_out;
+ }
+
+ if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
+ opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
+ (req_oplevel != SMB2_OPLOCK_LEVEL_II &&
+ req_oplevel != SMB2_OPLOCK_LEVEL_NONE)) {
+ err = STATUS_INVALID_OPLOCK_PROTOCOL;
+ oplock_change_type = OPLOCK_WRITE_TO_NONE;
+ } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
+ req_oplevel != SMB2_OPLOCK_LEVEL_NONE) {
+ err = STATUS_INVALID_OPLOCK_PROTOCOL;
+ oplock_change_type = OPLOCK_READ_TO_NONE;
+ } else if (req_oplevel == SMB2_OPLOCK_LEVEL_II ||
+ req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
+ err = STATUS_INVALID_DEVICE_STATE;
+ if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
+ opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
+ req_oplevel == SMB2_OPLOCK_LEVEL_II) {
+ oplock_change_type = OPLOCK_WRITE_TO_READ;
+ } else if ((opinfo->level == SMB2_OPLOCK_LEVEL_EXCLUSIVE ||
+ opinfo->level == SMB2_OPLOCK_LEVEL_BATCH) &&
+ req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
+ oplock_change_type = OPLOCK_WRITE_TO_NONE;
+ } else if (opinfo->level == SMB2_OPLOCK_LEVEL_II &&
+ req_oplevel == SMB2_OPLOCK_LEVEL_NONE) {
+ oplock_change_type = OPLOCK_READ_TO_NONE;
+ } else {
+ oplock_change_type = 0;
+ }
+ } else {
+ oplock_change_type = 0;
+ }
+
+ switch (oplock_change_type) {
+ case OPLOCK_WRITE_TO_READ:
+ ret = opinfo_write_to_read(opinfo);
+ rsp_oplevel = SMB2_OPLOCK_LEVEL_II;
+ break;
+ case OPLOCK_WRITE_TO_NONE:
+ ret = opinfo_write_to_none(opinfo);
+ rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
+ break;
+ case OPLOCK_READ_TO_NONE:
+ ret = opinfo_read_to_none(opinfo);
+ rsp_oplevel = SMB2_OPLOCK_LEVEL_NONE;
+ break;
+ default:
+ pr_err("unknown oplock change 0x%x -> 0x%x\n",
+ opinfo->level, rsp_oplevel);
+ }
+
+ if (ret < 0) {
+ rsp->hdr.Status = err;
+ goto err_out;
+ }
+
+ opinfo->op_state = OPLOCK_STATE_NONE;
+ wake_up_interruptible_all(&opinfo->oplock_q);
+ opinfo_put(opinfo);
+ ksmbd_fd_put(work, fp);
+
+ rsp->StructureSize = cpu_to_le16(24);
+ rsp->OplockLevel = rsp_oplevel;
+ rsp->Reserved = 0;
+ rsp->Reserved2 = 0;
+ rsp->VolatileFid = volatile_id;
+ rsp->PersistentFid = persistent_id;
+ ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_oplock_break));
+ if (!ret)
+ return;
+
+err_out:
+ opinfo->op_state = OPLOCK_STATE_NONE;
+ wake_up_interruptible_all(&opinfo->oplock_q);
+
+ opinfo_put(opinfo);
+ ksmbd_fd_put(work, fp);
+ smb2_set_err_rsp(work);
+}
+
+static int check_lease_state(struct lease *lease, __le32 req_state)
+{
+ if ((lease->new_state ==
+ (SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE)) &&
+ !(req_state & SMB2_LEASE_WRITE_CACHING_LE)) {
+ lease->new_state = req_state;
+ return 0;
+ }
+
+ if (lease->new_state == req_state)
+ return 0;
+
+ return 1;
+}
+
+/**
+ * smb21_lease_break_ack() - handler for smb2.1 lease break command
+ * @work: smb work containing lease break command buffer
+ *
+ * Return: 0
+ */
+static void smb21_lease_break_ack(struct ksmbd_work *work)
+{
+ struct ksmbd_conn *conn = work->conn;
+ struct smb2_lease_ack *req;
+ struct smb2_lease_ack *rsp;
+ struct oplock_info *opinfo;
+ __le32 err = 0;
+ int ret = 0;
+ unsigned int lease_change_type;
+ __le32 lease_state;
+ struct lease *lease;
+
+ WORK_BUFFERS(work, req, rsp);
+
+ ksmbd_debug(OPLOCK, "smb21 lease break, lease state(0x%x)\n",
+ le32_to_cpu(req->LeaseState));
+ opinfo = lookup_lease_in_table(conn, req->LeaseKey);
+ if (!opinfo) {
+ ksmbd_debug(OPLOCK, "file not opened\n");
+ smb2_set_err_rsp(work);
+ rsp->hdr.Status = STATUS_UNSUCCESSFUL;
+ return;
+ }
+ lease = opinfo->o_lease;
+
+ if (opinfo->op_state == OPLOCK_STATE_NONE) {
+ pr_err("unexpected lease break state 0x%x\n",
+ opinfo->op_state);
+ rsp->hdr.Status = STATUS_UNSUCCESSFUL;
+ goto err_out;
+ }
+
+ if (check_lease_state(lease, req->LeaseState)) {
+ rsp->hdr.Status = STATUS_REQUEST_NOT_ACCEPTED;
+ ksmbd_debug(OPLOCK,
+ "req lease state: 0x%x, expected state: 0x%x\n",
+ req->LeaseState, lease->new_state);
+ goto err_out;
+ }
+
+ if (!atomic_read(&opinfo->breaking_cnt)) {
+ rsp->hdr.Status = STATUS_UNSUCCESSFUL;
+ goto err_out;
+ }
+
+ /* check for bad lease state */
+ if (req->LeaseState &
+ (~(SMB2_LEASE_READ_CACHING_LE | SMB2_LEASE_HANDLE_CACHING_LE))) {
+ err = STATUS_INVALID_OPLOCK_PROTOCOL;
+ if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
+ lease_change_type = OPLOCK_WRITE_TO_NONE;
+ else
+ lease_change_type = OPLOCK_READ_TO_NONE;
+ ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
+ le32_to_cpu(lease->state),
+ le32_to_cpu(req->LeaseState));
+ } else if (lease->state == SMB2_LEASE_READ_CACHING_LE &&
+ req->LeaseState != SMB2_LEASE_NONE_LE) {
+ err = STATUS_INVALID_OPLOCK_PROTOCOL;
+ lease_change_type = OPLOCK_READ_TO_NONE;
+ ksmbd_debug(OPLOCK, "handle bad lease state 0x%x -> 0x%x\n",
+ le32_to_cpu(lease->state),
+ le32_to_cpu(req->LeaseState));
+ } else {
+ /* valid lease state changes */
+ err = STATUS_INVALID_DEVICE_STATE;
+ if (req->LeaseState == SMB2_LEASE_NONE_LE) {
+ if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
+ lease_change_type = OPLOCK_WRITE_TO_NONE;
+ else
+ lease_change_type = OPLOCK_READ_TO_NONE;
+ } else if (req->LeaseState & SMB2_LEASE_READ_CACHING_LE) {
+ if (lease->state & SMB2_LEASE_WRITE_CACHING_LE)
+ lease_change_type = OPLOCK_WRITE_TO_READ;
+ else
+ lease_change_type = OPLOCK_READ_HANDLE_TO_READ;
+ } else {
+ lease_change_type = 0;
+ }
+ }
+
+ switch (lease_change_type) {
+ case OPLOCK_WRITE_TO_READ:
+ ret = opinfo_write_to_read(opinfo);
+ break;
+ case OPLOCK_READ_HANDLE_TO_READ:
+ ret = opinfo_read_handle_to_read(opinfo);
+ break;
+ case OPLOCK_WRITE_TO_NONE:
+ ret = opinfo_write_to_none(opinfo);
+ break;
+ case OPLOCK_READ_TO_NONE:
+ ret = opinfo_read_to_none(opinfo);
+ break;
+ default:
+ ksmbd_debug(OPLOCK, "unknown lease change 0x%x -> 0x%x\n",
+ le32_to_cpu(lease->state),
+ le32_to_cpu(req->LeaseState));
+ }
+
+ if (ret < 0) {
+ rsp->hdr.Status = err;
+ goto err_out;
+ }
+
+ lease_state = lease->state;
+ opinfo->op_state = OPLOCK_STATE_NONE;
+ wake_up_interruptible_all(&opinfo->oplock_q);
+ atomic_dec(&opinfo->breaking_cnt);
+ wake_up_interruptible_all(&opinfo->oplock_brk);
+ opinfo_put(opinfo);
+
+ rsp->StructureSize = cpu_to_le16(36);
+ rsp->Reserved = 0;
+ rsp->Flags = 0;
+ memcpy(rsp->LeaseKey, req->LeaseKey, 16);
+ rsp->LeaseState = lease_state;
+ rsp->LeaseDuration = 0;
+ ret = ksmbd_iov_pin_rsp(work, rsp, sizeof(struct smb2_lease_ack));
+ if (!ret)
+ return;
+
+err_out:
+ wake_up_interruptible_all(&opinfo->oplock_q);
+ atomic_dec(&opinfo->breaking_cnt);
+ wake_up_interruptible_all(&opinfo->oplock_brk);
+
+ opinfo_put(opinfo);
+ smb2_set_err_rsp(work);
+}
+
+/**
+ * smb2_oplock_break() - dispatcher for smb2.0 and 2.1 oplock/lease break
+ * @work: smb work containing oplock/lease break command buffer
+ *
+ * Return: 0
+ */
+int smb2_oplock_break(struct ksmbd_work *work)
+{
+ struct smb2_oplock_break *req;
+ struct smb2_oplock_break *rsp;
+
+ WORK_BUFFERS(work, req, rsp);
+
+ switch (le16_to_cpu(req->StructureSize)) {
+ case OP_BREAK_STRUCT_SIZE_20:
+ smb20_oplock_break_ack(work);
+ break;
+ case OP_BREAK_STRUCT_SIZE_21:
+ smb21_lease_break_ack(work);
+ break;
+ default:
+ ksmbd_debug(OPLOCK, "invalid break cmd %d\n",
+ le16_to_cpu(req->StructureSize));
+ rsp->hdr.Status = STATUS_INVALID_PARAMETER;
+ smb2_set_err_rsp(work);
+ }
+
+ return 0;
+}
+
+/**
+ * smb2_notify() - handler for smb2 notify request
+ * @work: smb work containing notify command buffer
+ *
+ * Return: 0
+ */
+int smb2_notify(struct ksmbd_work *work)
+{
+ struct smb2_change_notify_req *req;
+ struct smb2_change_notify_rsp *rsp;
+
+ WORK_BUFFERS(work, req, rsp);
+
+ if (work->next_smb2_rcv_hdr_off && req->hdr.NextCommand) {
+ rsp->hdr.Status = STATUS_INTERNAL_ERROR;
+ smb2_set_err_rsp(work);
+ return 0;
+ }
+
+ smb2_set_err_rsp(work);
+ rsp->hdr.Status = STATUS_NOT_IMPLEMENTED;
+ return 0;
+}
+
+/**
+ * smb2_is_sign_req() - handler for checking packet signing status
+ * @work: smb work containing notify command buffer
+ * @command: SMB2 command id
+ *
+ * Return: true if packed is signed, false otherwise
+ */
+bool smb2_is_sign_req(struct ksmbd_work *work, unsigned int command)
+{
+ struct smb2_hdr *rcv_hdr2 = smb2_get_msg(work->request_buf);
+
+ if ((rcv_hdr2->Flags & SMB2_FLAGS_SIGNED) &&
+ command != SMB2_NEGOTIATE_HE &&
+ command != SMB2_SESSION_SETUP_HE &&
+ command != SMB2_OPLOCK_BREAK_HE)
+ return true;
+
+ return false;
+}
+
+/**
+ * smb2_check_sign_req() - handler for req packet sign processing
+ * @work: smb work containing notify command buffer
+ *
+ * Return: 1 on success, 0 otherwise
+ */
+int smb2_check_sign_req(struct ksmbd_work *work)
+{
+ struct smb2_hdr *hdr;
+ char signature_req[SMB2_SIGNATURE_SIZE];
+ char signature[SMB2_HMACSHA256_SIZE];
+ struct kvec iov[1];
+ size_t len;
+
+ hdr = smb2_get_msg(work->request_buf);
+ if (work->next_smb2_rcv_hdr_off)
+ hdr = ksmbd_req_buf_next(work);
+
+ if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
+ len = get_rfc1002_len(work->request_buf);
+ else if (hdr->NextCommand)
+ len = le32_to_cpu(hdr->NextCommand);
+ else
+ len = get_rfc1002_len(work->request_buf) -
+ work->next_smb2_rcv_hdr_off;
+
+ memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
+ memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
+
+ iov[0].iov_base = (char *)&hdr->ProtocolId;
+ iov[0].iov_len = len;
+
+ if (ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, 1,
+ signature))
+ return 0;
+
+ if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
+ pr_err("bad smb2 signature\n");
+ return 0;
+ }
+
+ return 1;
+}
+
+/**
+ * smb2_set_sign_rsp() - handler for rsp packet sign processing
+ * @work: smb work containing notify command buffer
+ *
+ */
+void smb2_set_sign_rsp(struct ksmbd_work *work)
+{
+ struct smb2_hdr *hdr;
+ char signature[SMB2_HMACSHA256_SIZE];
+ struct kvec *iov;
+ int n_vec = 1;
+
+ hdr = ksmbd_resp_buf_curr(work);
+ hdr->Flags |= SMB2_FLAGS_SIGNED;
+ memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
+
+ if (hdr->Command == SMB2_READ) {
+ iov = &work->iov[work->iov_idx - 1];
+ n_vec++;
+ } else {
+ iov = &work->iov[work->iov_idx];
+ }
+
+ if (!ksmbd_sign_smb2_pdu(work->conn, work->sess->sess_key, iov, n_vec,
+ signature))
+ memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
+}
+
+/**
+ * smb3_check_sign_req() - handler for req packet sign processing
+ * @work: smb work containing notify command buffer
+ *
+ * Return: 1 on success, 0 otherwise
+ */
+int smb3_check_sign_req(struct ksmbd_work *work)
+{
+ struct ksmbd_conn *conn = work->conn;
+ char *signing_key;
+ struct smb2_hdr *hdr;
+ struct channel *chann;
+ char signature_req[SMB2_SIGNATURE_SIZE];
+ char signature[SMB2_CMACAES_SIZE];
+ struct kvec iov[1];
+ size_t len;
+
+ hdr = smb2_get_msg(work->request_buf);
+ if (work->next_smb2_rcv_hdr_off)
+ hdr = ksmbd_req_buf_next(work);
+
+ if (!hdr->NextCommand && !work->next_smb2_rcv_hdr_off)
+ len = get_rfc1002_len(work->request_buf);
+ else if (hdr->NextCommand)
+ len = le32_to_cpu(hdr->NextCommand);
+ else
+ len = get_rfc1002_len(work->request_buf) -
+ work->next_smb2_rcv_hdr_off;
+
+ if (le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
+ signing_key = work->sess->smb3signingkey;
+ } else {
+ chann = lookup_chann_list(work->sess, conn);
+ if (!chann) {
+ return 0;
+ }
+ signing_key = chann->smb3signingkey;
+ }
+
+ if (!signing_key) {
+ pr_err("SMB3 signing key is not generated\n");
+ return 0;
+ }
+
+ memcpy(signature_req, hdr->Signature, SMB2_SIGNATURE_SIZE);
+ memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
+ iov[0].iov_base = (char *)&hdr->ProtocolId;
+ iov[0].iov_len = len;
+
+ if (ksmbd_sign_smb3_pdu(conn, signing_key, iov, 1, signature))
+ return 0;
+
+ if (memcmp(signature, signature_req, SMB2_SIGNATURE_SIZE)) {
+ pr_err("bad smb2 signature\n");
+ return 0;
+ }
+
+ return 1;
+}
+
+/**
+ * smb3_set_sign_rsp() - handler for rsp packet sign processing
+ * @work: smb work containing notify command buffer
+ *
+ */
+void smb3_set_sign_rsp(struct ksmbd_work *work)
+{
+ struct ksmbd_conn *conn = work->conn;
+ struct smb2_hdr *hdr;
+ struct channel *chann;
+ char signature[SMB2_CMACAES_SIZE];
+ struct kvec *iov;
+ int n_vec = 1;
+ char *signing_key;
+
+ hdr = ksmbd_resp_buf_curr(work);
+
+ if (conn->binding == false &&
+ le16_to_cpu(hdr->Command) == SMB2_SESSION_SETUP_HE) {
+ signing_key = work->sess->smb3signingkey;
+ } else {
+ chann = lookup_chann_list(work->sess, work->conn);
+ if (!chann) {
+ return;
+ }
+ signing_key = chann->smb3signingkey;
+ }
+
+ if (!signing_key)
+ return;
+
+ hdr->Flags |= SMB2_FLAGS_SIGNED;
+ memset(hdr->Signature, 0, SMB2_SIGNATURE_SIZE);
+
+ if (hdr->Command == SMB2_READ) {
+ iov = &work->iov[work->iov_idx - 1];
+ n_vec++;
+ } else {
+ iov = &work->iov[work->iov_idx];
+ }
+
+ if (!ksmbd_sign_smb3_pdu(conn, signing_key, iov, n_vec,
+ signature))
+ memcpy(hdr->Signature, signature, SMB2_SIGNATURE_SIZE);
+}
+
+/**
+ * smb3_preauth_hash_rsp() - handler for computing preauth hash on response
+ * @work: smb work containing response buffer
+ *
+ */
+void smb3_preauth_hash_rsp(struct ksmbd_work *work)
+{
+ struct ksmbd_conn *conn = work->conn;
+ struct ksmbd_session *sess = work->sess;
+ struct smb2_hdr *req, *rsp;
+
+ if (conn->dialect != SMB311_PROT_ID)
+ return;
+
+ WORK_BUFFERS(work, req, rsp);
+
+ if (le16_to_cpu(req->Command) == SMB2_NEGOTIATE_HE &&
+ conn->preauth_info)
+ ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
+ conn->preauth_info->Preauth_HashValue);
+
+ if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE && sess) {
+ __u8 *hash_value;
+
+ if (conn->binding) {
+ struct preauth_session *preauth_sess;
+
+ preauth_sess = ksmbd_preauth_session_lookup(conn, sess->id);
+ if (!preauth_sess)
+ return;
+ hash_value = preauth_sess->Preauth_HashValue;
+ } else {
+ hash_value = sess->Preauth_HashValue;
+ if (!hash_value)
+ return;
+ }
+ ksmbd_gen_preauth_integrity_hash(conn, work->response_buf,
+ hash_value);
+ }
+}
+
+static void fill_transform_hdr(void *tr_buf, char *old_buf, __le16 cipher_type)
+{
+ struct smb2_transform_hdr *tr_hdr = tr_buf + 4;
+ struct smb2_hdr *hdr = smb2_get_msg(old_buf);
+ unsigned int orig_len = get_rfc1002_len(old_buf);
+
+ /* tr_buf must be cleared by the caller */
+ tr_hdr->ProtocolId = SMB2_TRANSFORM_PROTO_NUM;
+ tr_hdr->OriginalMessageSize = cpu_to_le32(orig_len);
+ tr_hdr->Flags = cpu_to_le16(TRANSFORM_FLAG_ENCRYPTED);
+ if (cipher_type == SMB2_ENCRYPTION_AES128_GCM ||
+ cipher_type == SMB2_ENCRYPTION_AES256_GCM)
+ get_random_bytes(&tr_hdr->Nonce, SMB3_AES_GCM_NONCE);
+ else
+ get_random_bytes(&tr_hdr->Nonce, SMB3_AES_CCM_NONCE);
+ memcpy(&tr_hdr->SessionId, &hdr->SessionId, 8);
+ inc_rfc1001_len(tr_buf, sizeof(struct smb2_transform_hdr));
+ inc_rfc1001_len(tr_buf, orig_len);
+}
+
+int smb3_encrypt_resp(struct ksmbd_work *work)
+{
+ struct kvec *iov = work->iov;
+ int rc = -ENOMEM;
+ void *tr_buf;
+
+ tr_buf = kzalloc(sizeof(struct smb2_transform_hdr) + 4, GFP_KERNEL);
+ if (!tr_buf)
+ return rc;
+
+ /* fill transform header */
+ fill_transform_hdr(tr_buf, work->response_buf, work->conn->cipher_type);
+
+ iov[0].iov_base = tr_buf;
+ iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
+ work->tr_buf = tr_buf;
+
+ return ksmbd_crypt_message(work, iov, work->iov_idx + 1, 1);
+}
+
+bool smb3_is_transform_hdr(void *buf)
+{
+ struct smb2_transform_hdr *trhdr = smb2_get_msg(buf);
+
+ return trhdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM;
+}
+
+int smb3_decrypt_req(struct ksmbd_work *work)
+{
+ struct ksmbd_session *sess;
+ char *buf = work->request_buf;
+ unsigned int pdu_length = get_rfc1002_len(buf);
+ struct kvec iov[2];
+ int buf_data_size = pdu_length - sizeof(struct smb2_transform_hdr);
+ struct smb2_transform_hdr *tr_hdr = smb2_get_msg(buf);
+ int rc = 0;
+
+ if (pdu_length < sizeof(struct smb2_transform_hdr) ||
+ buf_data_size < sizeof(struct smb2_hdr)) {
+ pr_err("Transform message is too small (%u)\n",
+ pdu_length);
+ return -ECONNABORTED;
+ }
+
+ if (buf_data_size < le32_to_cpu(tr_hdr->OriginalMessageSize)) {
+ pr_err("Transform message is broken\n");
+ return -ECONNABORTED;
+ }
+
+ sess = ksmbd_session_lookup_all(work->conn, le64_to_cpu(tr_hdr->SessionId));
+ if (!sess) {
+ pr_err("invalid session id(%llx) in transform header\n",
+ le64_to_cpu(tr_hdr->SessionId));
+ return -ECONNABORTED;
+ }
+
+ iov[0].iov_base = buf;
+ iov[0].iov_len = sizeof(struct smb2_transform_hdr) + 4;
+ iov[1].iov_base = buf + sizeof(struct smb2_transform_hdr) + 4;
+ iov[1].iov_len = buf_data_size;
+ rc = ksmbd_crypt_message(work, iov, 2, 0);
+ if (rc)
+ return rc;
+
+ memmove(buf + 4, iov[1].iov_base, buf_data_size);
+ *(__be32 *)buf = cpu_to_be32(buf_data_size);
+
+ return rc;
+}
+
+bool smb3_11_final_sess_setup_resp(struct ksmbd_work *work)
+{
+ struct ksmbd_conn *conn = work->conn;
+ struct ksmbd_session *sess = work->sess;
+ struct smb2_hdr *rsp = smb2_get_msg(work->response_buf);
+
+ if (conn->dialect < SMB30_PROT_ID)
+ return false;
+
+ if (work->next_smb2_rcv_hdr_off)
+ rsp = ksmbd_resp_buf_next(work);
+
+ if (le16_to_cpu(rsp->Command) == SMB2_SESSION_SETUP_HE &&
+ sess->user && !user_guest(sess->user) &&
+ rsp->Status == STATUS_SUCCESS)
+ return true;
+ return false;
+}