diff options
Diffstat (limited to 'fs/cifs/cifs_debug.c')
| -rw-r--r-- | fs/cifs/cifs_debug.c | 876 |
1 files changed, 876 insertions, 0 deletions
diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c new file mode 100644 index 000000000..a85aeff90 --- /dev/null +++ b/fs/cifs/cifs_debug.c @@ -0,0 +1,876 @@ +/* + * fs/cifs_debug.c + * + * Copyright (C) International Business Machines Corp., 2000,2005 + * + * Modified by Steve French (sfrench@us.ibm.com) + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See + * the GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ +#include <linux/fs.h> +#include <linux/string.h> +#include <linux/ctype.h> +#include <linux/module.h> +#include <linux/proc_fs.h> +#include <linux/uaccess.h> +#include "cifspdu.h" +#include "cifsglob.h" +#include "cifsproto.h" +#include "cifs_debug.h" +#include "cifsfs.h" +#ifdef CONFIG_CIFS_SMB_DIRECT +#include "smbdirect.h" +#endif + +void +cifs_dump_mem(char *label, void *data, int length) +{ + pr_debug("%s: dump of %d bytes of data at 0x%p\n", label, length, data); + print_hex_dump(KERN_DEBUG, "", DUMP_PREFIX_OFFSET, 16, 4, + data, length, true); +} + +void cifs_dump_detail(void *buf, struct TCP_Server_Info *server) +{ +#ifdef CONFIG_CIFS_DEBUG2 + struct smb_hdr *smb = (struct smb_hdr *)buf; + + cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d\n", + smb->Command, smb->Status.CifsError, + smb->Flags, smb->Flags2, smb->Mid, smb->Pid); + cifs_dbg(VFS, "smb buf %p len %u\n", smb, + server->ops->calc_smb_size(smb, server)); +#endif /* CONFIG_CIFS_DEBUG2 */ +} + +void cifs_dump_mids(struct TCP_Server_Info *server) +{ +#ifdef CONFIG_CIFS_DEBUG2 + struct list_head *tmp; + struct mid_q_entry *mid_entry; + + if (server == NULL) + return; + + cifs_dbg(VFS, "Dump pending requests:\n"); + spin_lock(&GlobalMid_Lock); + list_for_each(tmp, &server->pending_mid_q) { + mid_entry = list_entry(tmp, struct mid_q_entry, qhead); + cifs_dbg(VFS, "State: %d Cmd: %d Pid: %d Cbdata: %p Mid %llu\n", + mid_entry->mid_state, + le16_to_cpu(mid_entry->command), + mid_entry->pid, + mid_entry->callback_data, + mid_entry->mid); +#ifdef CONFIG_CIFS_STATS2 + cifs_dbg(VFS, "IsLarge: %d buf: %p time rcv: %ld now: %ld\n", + mid_entry->large_buf, + mid_entry->resp_buf, + mid_entry->when_received, + jiffies); +#endif /* STATS2 */ + cifs_dbg(VFS, "IsMult: %d IsEnd: %d\n", + mid_entry->multiRsp, mid_entry->multiEnd); + if (mid_entry->resp_buf) { + cifs_dump_detail(mid_entry->resp_buf, server); + cifs_dump_mem("existing buf: ", + mid_entry->resp_buf, 62); + } + } + spin_unlock(&GlobalMid_Lock); +#endif /* CONFIG_CIFS_DEBUG2 */ +} + +#ifdef CONFIG_PROC_FS +static void cifs_debug_tcon(struct seq_file *m, struct cifs_tcon *tcon) +{ + __u32 dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType); + + seq_printf(m, "%s Mounts: %d ", tcon->treeName, tcon->tc_count); + if (tcon->nativeFileSystem) + seq_printf(m, "Type: %s ", tcon->nativeFileSystem); + seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x\n\tPathComponentMax: %d Status: %d", + le32_to_cpu(tcon->fsDevInfo.DeviceCharacteristics), + le32_to_cpu(tcon->fsAttrInfo.Attributes), + le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength), + tcon->tidStatus); + if (dev_type == FILE_DEVICE_DISK) + seq_puts(m, " type: DISK "); + else if (dev_type == FILE_DEVICE_CD_ROM) + seq_puts(m, " type: CDROM "); + else + seq_printf(m, " type: %d ", dev_type); + if (tcon->seal) + seq_printf(m, " Encrypted"); + if (tcon->nocase) + seq_printf(m, " nocase"); + if (tcon->unix_ext) + seq_printf(m, " POSIX Extensions"); + if (tcon->ses->server->ops->dump_share_caps) + tcon->ses->server->ops->dump_share_caps(m, tcon); + + if (tcon->need_reconnect) + seq_puts(m, "\tDISCONNECTED "); + seq_putc(m, '\n'); +} + +static void +cifs_dump_iface(struct seq_file *m, struct cifs_server_iface *iface) +{ + struct sockaddr_in *ipv4 = (struct sockaddr_in *)&iface->sockaddr; + struct sockaddr_in6 *ipv6 = (struct sockaddr_in6 *)&iface->sockaddr; + + seq_printf(m, "\t\tSpeed: %zu bps\n", iface->speed); + seq_puts(m, "\t\tCapabilities: "); + if (iface->rdma_capable) + seq_puts(m, "rdma "); + if (iface->rss_capable) + seq_puts(m, "rss "); + seq_putc(m, '\n'); + if (iface->sockaddr.ss_family == AF_INET) + seq_printf(m, "\t\tIPv4: %pI4\n", &ipv4->sin_addr); + else if (iface->sockaddr.ss_family == AF_INET6) + seq_printf(m, "\t\tIPv6: %pI6\n", &ipv6->sin6_addr); +} + +static int cifs_debug_data_proc_show(struct seq_file *m, void *v) +{ + struct list_head *tmp1, *tmp2, *tmp3; + struct mid_q_entry *mid_entry; + struct TCP_Server_Info *server; + struct cifs_ses *ses; + struct cifs_tcon *tcon; + int i, j; + + seq_puts(m, + "Display Internal CIFS Data Structures for Debugging\n" + "---------------------------------------------------\n"); + seq_printf(m, "CIFS Version %s\n", CIFS_VERSION); + seq_printf(m, "Features:"); +#ifdef CONFIG_CIFS_DFS_UPCALL + seq_printf(m, " DFS"); +#endif +#ifdef CONFIG_CIFS_FSCACHE + seq_printf(m, ",FSCACHE"); +#endif +#ifdef CONFIG_CIFS_SMB_DIRECT + seq_printf(m, ",SMB_DIRECT"); +#endif +#ifdef CONFIG_CIFS_STATS2 + seq_printf(m, ",STATS2"); +#else + seq_printf(m, ",STATS"); +#endif +#ifdef CONFIG_CIFS_DEBUG2 + seq_printf(m, ",DEBUG2"); +#elif defined(CONFIG_CIFS_DEBUG) + seq_printf(m, ",DEBUG"); +#endif +#ifdef CONFIG_CIFS_ALLOW_INSECURE_LEGACY + seq_printf(m, ",ALLOW_INSECURE_LEGACY"); +#endif +#ifdef CONFIG_CIFS_WEAK_PW_HASH + seq_printf(m, ",WEAK_PW_HASH"); +#endif +#ifdef CONFIG_CIFS_POSIX + seq_printf(m, ",CIFS_POSIX"); +#endif +#ifdef CONFIG_CIFS_UPCALL + seq_printf(m, ",UPCALL(SPNEGO)"); +#endif +#ifdef CONFIG_CIFS_XATTR + seq_printf(m, ",XATTR"); +#endif +#ifdef CONFIG_CIFS_ACL + seq_printf(m, ",ACL"); +#endif + seq_putc(m, '\n'); + seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid); + seq_printf(m, "Servers:"); + + i = 0; + spin_lock(&cifs_tcp_ses_lock); + list_for_each(tmp1, &cifs_tcp_ses_list) { + server = list_entry(tmp1, struct TCP_Server_Info, + tcp_ses_list); + +#ifdef CONFIG_CIFS_SMB_DIRECT + if (!server->rdma) + goto skip_rdma; + + if (!server->smbd_conn) { + seq_printf(m, "\nSMBDirect transport not available"); + goto skip_rdma; + } + + seq_printf(m, "\nSMBDirect (in hex) protocol version: %x " + "transport status: %x", + server->smbd_conn->protocol, + server->smbd_conn->transport_status); + seq_printf(m, "\nConn receive_credit_max: %x " + "send_credit_target: %x max_send_size: %x", + server->smbd_conn->receive_credit_max, + server->smbd_conn->send_credit_target, + server->smbd_conn->max_send_size); + seq_printf(m, "\nConn max_fragmented_recv_size: %x " + "max_fragmented_send_size: %x max_receive_size:%x", + server->smbd_conn->max_fragmented_recv_size, + server->smbd_conn->max_fragmented_send_size, + server->smbd_conn->max_receive_size); + seq_printf(m, "\nConn keep_alive_interval: %x " + "max_readwrite_size: %x rdma_readwrite_threshold: %x", + server->smbd_conn->keep_alive_interval, + server->smbd_conn->max_readwrite_size, + server->smbd_conn->rdma_readwrite_threshold); + seq_printf(m, "\nDebug count_get_receive_buffer: %x " + "count_put_receive_buffer: %x count_send_empty: %x", + server->smbd_conn->count_get_receive_buffer, + server->smbd_conn->count_put_receive_buffer, + server->smbd_conn->count_send_empty); + seq_printf(m, "\nRead Queue count_reassembly_queue: %x " + "count_enqueue_reassembly_queue: %x " + "count_dequeue_reassembly_queue: %x " + "fragment_reassembly_remaining: %x " + "reassembly_data_length: %x " + "reassembly_queue_length: %x", + server->smbd_conn->count_reassembly_queue, + server->smbd_conn->count_enqueue_reassembly_queue, + server->smbd_conn->count_dequeue_reassembly_queue, + server->smbd_conn->fragment_reassembly_remaining, + server->smbd_conn->reassembly_data_length, + server->smbd_conn->reassembly_queue_length); + seq_printf(m, "\nCurrent Credits send_credits: %x " + "receive_credits: %x receive_credit_target: %x", + atomic_read(&server->smbd_conn->send_credits), + atomic_read(&server->smbd_conn->receive_credits), + server->smbd_conn->receive_credit_target); + seq_printf(m, "\nPending send_pending: %x send_payload_pending:" + " %x smbd_send_pending: %x smbd_recv_pending: %x", + atomic_read(&server->smbd_conn->send_pending), + atomic_read(&server->smbd_conn->send_payload_pending), + server->smbd_conn->smbd_send_pending, + server->smbd_conn->smbd_recv_pending); + seq_printf(m, "\nReceive buffers count_receive_queue: %x " + "count_empty_packet_queue: %x", + server->smbd_conn->count_receive_queue, + server->smbd_conn->count_empty_packet_queue); + seq_printf(m, "\nMR responder_resources: %x " + "max_frmr_depth: %x mr_type: %x", + server->smbd_conn->responder_resources, + server->smbd_conn->max_frmr_depth, + server->smbd_conn->mr_type); + seq_printf(m, "\nMR mr_ready_count: %x mr_used_count: %x", + atomic_read(&server->smbd_conn->mr_ready_count), + atomic_read(&server->smbd_conn->mr_used_count)); +skip_rdma: +#endif + seq_printf(m, "\nNumber of credits: %d Dialect 0x%x", + server->credits, server->dialect); + if (server->sign) + seq_printf(m, " signed"); + if (server->posix_ext_supported) + seq_printf(m, " posix"); + + i++; + list_for_each(tmp2, &server->smb_ses_list) { + ses = list_entry(tmp2, struct cifs_ses, + smb_ses_list); + if ((ses->serverDomain == NULL) || + (ses->serverOS == NULL) || + (ses->serverNOS == NULL)) { + seq_printf(m, "\n%d) Name: %s Uses: %d Capability: 0x%x\tSession Status: %d\t", + i, ses->serverName, ses->ses_count, + ses->capabilities, ses->status); + if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST) + seq_printf(m, "Guest\t"); + else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL) + seq_printf(m, "Anonymous\t"); + } else { + seq_printf(m, + "\n%d) Name: %s Domain: %s Uses: %d OS:" + " %s\n\tNOS: %s\tCapability: 0x%x\n\tSMB" + " session status: %d\t", + i, ses->serverName, ses->serverDomain, + ses->ses_count, ses->serverOS, ses->serverNOS, + ses->capabilities, ses->status); + } + if (server->rdma) + seq_printf(m, "RDMA\n\t"); + seq_printf(m, "TCP status: %d\n\tLocal Users To " + "Server: %d SecMode: 0x%x Req On Wire: %d", + server->tcpStatus, server->srv_count, + server->sec_mode, in_flight(server)); + +#ifdef CONFIG_CIFS_STATS2 + seq_printf(m, " In Send: %d In MaxReq Wait: %d", + atomic_read(&server->in_send), + atomic_read(&server->num_waiters)); +#endif + + seq_puts(m, "\n\tShares:"); + j = 0; + + seq_printf(m, "\n\t%d) IPC: ", j); + if (ses->tcon_ipc) + cifs_debug_tcon(m, ses->tcon_ipc); + else + seq_puts(m, "none\n"); + + list_for_each(tmp3, &ses->tcon_list) { + tcon = list_entry(tmp3, struct cifs_tcon, + tcon_list); + ++j; + seq_printf(m, "\n\t%d) ", j); + cifs_debug_tcon(m, tcon); + } + + seq_puts(m, "\n\tMIDs:\n"); + + spin_lock(&GlobalMid_Lock); + list_for_each(tmp3, &server->pending_mid_q) { + mid_entry = list_entry(tmp3, struct mid_q_entry, + qhead); + seq_printf(m, "\tState: %d com: %d pid:" + " %d cbdata: %p mid %llu\n", + mid_entry->mid_state, + le16_to_cpu(mid_entry->command), + mid_entry->pid, + mid_entry->callback_data, + mid_entry->mid); + } + spin_unlock(&GlobalMid_Lock); + + spin_lock(&ses->iface_lock); + if (ses->iface_count) + seq_printf(m, "\n\tServer interfaces: %zu\n", + ses->iface_count); + for (j = 0; j < ses->iface_count; j++) { + seq_printf(m, "\t%d)\n", j); + cifs_dump_iface(m, &ses->iface_list[j]); + } + spin_unlock(&ses->iface_lock); + } + } + spin_unlock(&cifs_tcp_ses_lock); + seq_putc(m, '\n'); + + /* BB add code to dump additional info such as TCP session info now */ + return 0; +} + +static ssize_t cifs_stats_proc_write(struct file *file, + const char __user *buffer, size_t count, loff_t *ppos) +{ + bool bv; + int rc; + struct list_head *tmp1, *tmp2, *tmp3; + struct TCP_Server_Info *server; + struct cifs_ses *ses; + struct cifs_tcon *tcon; + + rc = kstrtobool_from_user(buffer, count, &bv); + if (rc == 0) { +#ifdef CONFIG_CIFS_STATS2 + int i; + + atomic_set(&totBufAllocCount, 0); + atomic_set(&totSmBufAllocCount, 0); +#endif /* CONFIG_CIFS_STATS2 */ + atomic_set(&tcpSesReconnectCount, 0); + atomic_set(&tconInfoReconnectCount, 0); + + spin_lock(&GlobalMid_Lock); + GlobalMaxActiveXid = 0; + GlobalCurrentXid = 0; + spin_unlock(&GlobalMid_Lock); + spin_lock(&cifs_tcp_ses_lock); + list_for_each(tmp1, &cifs_tcp_ses_list) { + server = list_entry(tmp1, struct TCP_Server_Info, + tcp_ses_list); +#ifdef CONFIG_CIFS_STATS2 + for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) + atomic_set(&server->smb2slowcmd[i], 0); +#endif /* CONFIG_CIFS_STATS2 */ + list_for_each(tmp2, &server->smb_ses_list) { + ses = list_entry(tmp2, struct cifs_ses, + smb_ses_list); + list_for_each(tmp3, &ses->tcon_list) { + tcon = list_entry(tmp3, + struct cifs_tcon, + tcon_list); + atomic_set(&tcon->num_smbs_sent, 0); + spin_lock(&tcon->stat_lock); + tcon->bytes_read = 0; + tcon->bytes_written = 0; + spin_unlock(&tcon->stat_lock); + if (server->ops->clear_stats) + server->ops->clear_stats(tcon); + } + } + } + spin_unlock(&cifs_tcp_ses_lock); + } else { + return rc; + } + + return count; +} + +static int cifs_stats_proc_show(struct seq_file *m, void *v) +{ + int i; +#ifdef CONFIG_CIFS_STATS2 + int j; +#endif /* STATS2 */ + struct list_head *tmp1, *tmp2, *tmp3; + struct TCP_Server_Info *server; + struct cifs_ses *ses; + struct cifs_tcon *tcon; + + seq_printf(m, "Resources in use\nCIFS Session: %d\n", + sesInfoAllocCount.counter); + seq_printf(m, "Share (unique mount targets): %d\n", + tconInfoAllocCount.counter); + seq_printf(m, "SMB Request/Response Buffer: %d Pool size: %d\n", + bufAllocCount.counter, + cifs_min_rcv + tcpSesAllocCount.counter); + seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n", + smBufAllocCount.counter, cifs_min_small); +#ifdef CONFIG_CIFS_STATS2 + seq_printf(m, "Total Large %d Small %d Allocations\n", + atomic_read(&totBufAllocCount), + atomic_read(&totSmBufAllocCount)); +#endif /* CONFIG_CIFS_STATS2 */ + + seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&midCount)); + seq_printf(m, + "\n%d session %d share reconnects\n", + tcpSesReconnectCount.counter, tconInfoReconnectCount.counter); + + seq_printf(m, + "Total vfs operations: %d maximum at one time: %d\n", + GlobalCurrentXid, GlobalMaxActiveXid); + + i = 0; + spin_lock(&cifs_tcp_ses_lock); + list_for_each(tmp1, &cifs_tcp_ses_list) { + server = list_entry(tmp1, struct TCP_Server_Info, + tcp_ses_list); +#ifdef CONFIG_CIFS_STATS2 + for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++) + if (atomic_read(&server->smb2slowcmd[j])) + seq_printf(m, "%d slow responses from %s for command %d\n", + atomic_read(&server->smb2slowcmd[j]), + server->hostname, j); +#endif /* STATS2 */ + list_for_each(tmp2, &server->smb_ses_list) { + ses = list_entry(tmp2, struct cifs_ses, + smb_ses_list); + list_for_each(tmp3, &ses->tcon_list) { + tcon = list_entry(tmp3, + struct cifs_tcon, + tcon_list); + i++; + seq_printf(m, "\n%d) %s", i, tcon->treeName); + if (tcon->need_reconnect) + seq_puts(m, "\tDISCONNECTED "); + seq_printf(m, "\nSMBs: %d", + atomic_read(&tcon->num_smbs_sent)); + if (server->ops->print_stats) + server->ops->print_stats(m, tcon); + } + } + } + spin_unlock(&cifs_tcp_ses_lock); + + seq_putc(m, '\n'); + return 0; +} + +static int cifs_stats_proc_open(struct inode *inode, struct file *file) +{ + return single_open(file, cifs_stats_proc_show, NULL); +} + +static const struct file_operations cifs_stats_proc_fops = { + .open = cifs_stats_proc_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, + .write = cifs_stats_proc_write, +}; + +#ifdef CONFIG_CIFS_SMB_DIRECT +#define PROC_FILE_DEFINE(name) \ +static ssize_t name##_write(struct file *file, const char __user *buffer, \ + size_t count, loff_t *ppos) \ +{ \ + int rc; \ + rc = kstrtoint_from_user(buffer, count, 10, & name); \ + if (rc) \ + return rc; \ + return count; \ +} \ +static int name##_proc_show(struct seq_file *m, void *v) \ +{ \ + seq_printf(m, "%d\n", name ); \ + return 0; \ +} \ +static int name##_open(struct inode *inode, struct file *file) \ +{ \ + return single_open(file, name##_proc_show, NULL); \ +} \ +\ +static const struct file_operations cifs_##name##_proc_fops = { \ + .open = name##_open, \ + .read = seq_read, \ + .llseek = seq_lseek, \ + .release = single_release, \ + .write = name##_write, \ +} + +PROC_FILE_DEFINE(rdma_readwrite_threshold); +PROC_FILE_DEFINE(smbd_max_frmr_depth); +PROC_FILE_DEFINE(smbd_keep_alive_interval); +PROC_FILE_DEFINE(smbd_max_receive_size); +PROC_FILE_DEFINE(smbd_max_fragmented_recv_size); +PROC_FILE_DEFINE(smbd_max_send_size); +PROC_FILE_DEFINE(smbd_send_credit_target); +PROC_FILE_DEFINE(smbd_receive_credit_max); +#endif + +static struct proc_dir_entry *proc_fs_cifs; +static const struct file_operations cifsFYI_proc_fops; +static const struct file_operations cifs_lookup_cache_proc_fops; +static const struct file_operations traceSMB_proc_fops; +static const struct file_operations cifs_security_flags_proc_fops; +static const struct file_operations cifs_linux_ext_proc_fops; + +void +cifs_proc_init(void) +{ + proc_fs_cifs = proc_mkdir("fs/cifs", NULL); + if (proc_fs_cifs == NULL) + return; + + proc_create_single("DebugData", 0, proc_fs_cifs, + cifs_debug_data_proc_show); + + proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_fops); + proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_fops); + proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_fops); + proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs, + &cifs_linux_ext_proc_fops); + proc_create("SecurityFlags", 0644, proc_fs_cifs, + &cifs_security_flags_proc_fops); + proc_create("LookupCacheEnabled", 0644, proc_fs_cifs, + &cifs_lookup_cache_proc_fops); +#ifdef CONFIG_CIFS_SMB_DIRECT + proc_create("rdma_readwrite_threshold", 0644, proc_fs_cifs, + &cifs_rdma_readwrite_threshold_proc_fops); + proc_create("smbd_max_frmr_depth", 0644, proc_fs_cifs, + &cifs_smbd_max_frmr_depth_proc_fops); + proc_create("smbd_keep_alive_interval", 0644, proc_fs_cifs, + &cifs_smbd_keep_alive_interval_proc_fops); + proc_create("smbd_max_receive_size", 0644, proc_fs_cifs, + &cifs_smbd_max_receive_size_proc_fops); + proc_create("smbd_max_fragmented_recv_size", 0644, proc_fs_cifs, + &cifs_smbd_max_fragmented_recv_size_proc_fops); + proc_create("smbd_max_send_size", 0644, proc_fs_cifs, + &cifs_smbd_max_send_size_proc_fops); + proc_create("smbd_send_credit_target", 0644, proc_fs_cifs, + &cifs_smbd_send_credit_target_proc_fops); + proc_create("smbd_receive_credit_max", 0644, proc_fs_cifs, + &cifs_smbd_receive_credit_max_proc_fops); +#endif +} + +void +cifs_proc_clean(void) +{ + if (proc_fs_cifs == NULL) + return; + + remove_proc_entry("DebugData", proc_fs_cifs); + remove_proc_entry("cifsFYI", proc_fs_cifs); + remove_proc_entry("traceSMB", proc_fs_cifs); + remove_proc_entry("Stats", proc_fs_cifs); + remove_proc_entry("SecurityFlags", proc_fs_cifs); + remove_proc_entry("LinuxExtensionsEnabled", proc_fs_cifs); + remove_proc_entry("LookupCacheEnabled", proc_fs_cifs); +#ifdef CONFIG_CIFS_SMB_DIRECT + remove_proc_entry("rdma_readwrite_threshold", proc_fs_cifs); + remove_proc_entry("smbd_max_frmr_depth", proc_fs_cifs); + remove_proc_entry("smbd_keep_alive_interval", proc_fs_cifs); + remove_proc_entry("smbd_max_receive_size", proc_fs_cifs); + remove_proc_entry("smbd_max_fragmented_recv_size", proc_fs_cifs); + remove_proc_entry("smbd_max_send_size", proc_fs_cifs); + remove_proc_entry("smbd_send_credit_target", proc_fs_cifs); + remove_proc_entry("smbd_receive_credit_max", proc_fs_cifs); +#endif + remove_proc_entry("fs/cifs", NULL); +} + +static int cifsFYI_proc_show(struct seq_file *m, void *v) +{ + seq_printf(m, "%d\n", cifsFYI); + return 0; +} + +static int cifsFYI_proc_open(struct inode *inode, struct file *file) +{ + return single_open(file, cifsFYI_proc_show, NULL); +} + +static ssize_t cifsFYI_proc_write(struct file *file, const char __user *buffer, + size_t count, loff_t *ppos) +{ + char c[2] = { '\0' }; + bool bv; + int rc; + + rc = get_user(c[0], buffer); + if (rc) + return rc; + if (strtobool(c, &bv) == 0) + cifsFYI = bv; + else if ((c[0] > '1') && (c[0] <= '9')) + cifsFYI = (int) (c[0] - '0'); /* see cifs_debug.h for meanings */ + else + return -EINVAL; + + return count; +} + +static const struct file_operations cifsFYI_proc_fops = { + .open = cifsFYI_proc_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, + .write = cifsFYI_proc_write, +}; + +static int cifs_linux_ext_proc_show(struct seq_file *m, void *v) +{ + seq_printf(m, "%d\n", linuxExtEnabled); + return 0; +} + +static int cifs_linux_ext_proc_open(struct inode *inode, struct file *file) +{ + return single_open(file, cifs_linux_ext_proc_show, NULL); +} + +static ssize_t cifs_linux_ext_proc_write(struct file *file, + const char __user *buffer, size_t count, loff_t *ppos) +{ + int rc; + + rc = kstrtobool_from_user(buffer, count, &linuxExtEnabled); + if (rc) + return rc; + + return count; +} + +static const struct file_operations cifs_linux_ext_proc_fops = { + .open = cifs_linux_ext_proc_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, + .write = cifs_linux_ext_proc_write, +}; + +static int cifs_lookup_cache_proc_show(struct seq_file *m, void *v) +{ + seq_printf(m, "%d\n", lookupCacheEnabled); + return 0; +} + +static int cifs_lookup_cache_proc_open(struct inode *inode, struct file *file) +{ + return single_open(file, cifs_lookup_cache_proc_show, NULL); +} + +static ssize_t cifs_lookup_cache_proc_write(struct file *file, + const char __user *buffer, size_t count, loff_t *ppos) +{ + int rc; + + rc = kstrtobool_from_user(buffer, count, &lookupCacheEnabled); + if (rc) + return rc; + + return count; +} + +static const struct file_operations cifs_lookup_cache_proc_fops = { + .open = cifs_lookup_cache_proc_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, + .write = cifs_lookup_cache_proc_write, +}; + +static int traceSMB_proc_show(struct seq_file *m, void *v) +{ + seq_printf(m, "%d\n", traceSMB); + return 0; +} + +static int traceSMB_proc_open(struct inode *inode, struct file *file) +{ + return single_open(file, traceSMB_proc_show, NULL); +} + +static ssize_t traceSMB_proc_write(struct file *file, const char __user *buffer, + size_t count, loff_t *ppos) +{ + int rc; + + rc = kstrtobool_from_user(buffer, count, &traceSMB); + if (rc) + return rc; + + return count; +} + +static const struct file_operations traceSMB_proc_fops = { + .open = traceSMB_proc_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, + .write = traceSMB_proc_write, +}; + +static int cifs_security_flags_proc_show(struct seq_file *m, void *v) +{ + seq_printf(m, "0x%x\n", global_secflags); + return 0; +} + +static int cifs_security_flags_proc_open(struct inode *inode, struct file *file) +{ + return single_open(file, cifs_security_flags_proc_show, NULL); +} + +/* + * Ensure that if someone sets a MUST flag, that we disable all other MAY + * flags except for the ones corresponding to the given MUST flag. If there are + * multiple MUST flags, then try to prefer more secure ones. + */ +static void +cifs_security_flags_handle_must_flags(unsigned int *flags) +{ + unsigned int signflags = *flags & CIFSSEC_MUST_SIGN; + + if ((*flags & CIFSSEC_MUST_KRB5) == CIFSSEC_MUST_KRB5) + *flags = CIFSSEC_MUST_KRB5; + else if ((*flags & CIFSSEC_MUST_NTLMSSP) == CIFSSEC_MUST_NTLMSSP) + *flags = CIFSSEC_MUST_NTLMSSP; + else if ((*flags & CIFSSEC_MUST_NTLMV2) == CIFSSEC_MUST_NTLMV2) + *flags = CIFSSEC_MUST_NTLMV2; + else if ((*flags & CIFSSEC_MUST_NTLM) == CIFSSEC_MUST_NTLM) + *flags = CIFSSEC_MUST_NTLM; + else if (CIFSSEC_MUST_LANMAN && + (*flags & CIFSSEC_MUST_LANMAN) == CIFSSEC_MUST_LANMAN) + *flags = CIFSSEC_MUST_LANMAN; + else if (CIFSSEC_MUST_PLNTXT && + (*flags & CIFSSEC_MUST_PLNTXT) == CIFSSEC_MUST_PLNTXT) + *flags = CIFSSEC_MUST_PLNTXT; + + *flags |= signflags; +} + +static ssize_t cifs_security_flags_proc_write(struct file *file, + const char __user *buffer, size_t count, loff_t *ppos) +{ + int rc; + unsigned int flags; + char flags_string[12]; + bool bv; + + if ((count < 1) || (count > 11)) + return -EINVAL; + + memset(flags_string, 0, 12); + + if (copy_from_user(flags_string, buffer, count)) + return -EFAULT; + + if (count < 3) { + /* single char or single char followed by null */ + if (strtobool(flags_string, &bv) == 0) { + global_secflags = bv ? CIFSSEC_MAX : CIFSSEC_DEF; + return count; + } else if (!isdigit(flags_string[0])) { + cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", + flags_string); + return -EINVAL; + } + } + + /* else we have a number */ + rc = kstrtouint(flags_string, 0, &flags); + if (rc) { + cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", + flags_string); + return rc; + } + + cifs_dbg(FYI, "sec flags 0x%x\n", flags); + + if (flags == 0) { + cifs_dbg(VFS, "Invalid SecurityFlags: %s\n", flags_string); + return -EINVAL; + } + + if (flags & ~CIFSSEC_MASK) { + cifs_dbg(VFS, "Unsupported security flags: 0x%x\n", + flags & ~CIFSSEC_MASK); + return -EINVAL; + } + + cifs_security_flags_handle_must_flags(&flags); + + /* flags look ok - update the global security flags for cifs module */ + global_secflags = flags; + if (global_secflags & CIFSSEC_MUST_SIGN) { + /* requiring signing implies signing is allowed */ + global_secflags |= CIFSSEC_MAY_SIGN; + cifs_dbg(FYI, "packet signing now required\n"); + } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) { + cifs_dbg(FYI, "packet signing disabled\n"); + } + /* BB should we turn on MAY flags for other MUST options? */ + return count; +} + +static const struct file_operations cifs_security_flags_proc_fops = { + .open = cifs_security_flags_proc_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, + .write = cifs_security_flags_proc_write, +}; +#else +inline void cifs_proc_init(void) +{ +} + +inline void cifs_proc_clean(void) +{ +} +#endif /* PROC_FS */ |