diff options
Diffstat (limited to 'fs/smb/client/cifs_debug.c')
| -rw-r--r-- | fs/smb/client/cifs_debug.c | 1093 |
1 files changed, 1093 insertions, 0 deletions
diff --git a/fs/smb/client/cifs_debug.c b/fs/smb/client/cifs_debug.c new file mode 100644 index 000000000..5df8d9323 --- /dev/null +++ b/fs/smb/client/cifs_debug.c @@ -0,0 +1,1093 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * + * Copyright (C) International Business Machines Corp., 2000,2005 + * + * Modified by Steve French (sfrench@us.ibm.com) + */ +#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" +#include "fs_context.h" +#ifdef CONFIG_CIFS_DFS_UPCALL +#include "dfs_cache.h" +#endif +#ifdef CONFIG_CIFS_SMB_DIRECT +#include "smbdirect.h" +#endif +#include "cifs_swn.h" + +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 = buf; + + cifs_dbg(VFS, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d Wct: %d\n", + smb->Command, smb->Status.CifsError, smb->Flags, + smb->Flags2, smb->Mid, smb->Pid, smb->WordCount); + if (!server->ops->check_message(buf, server->total_read, server)) { + cifs_dbg(VFS, "smb buf %p len %u\n", smb, + server->ops->calc_smb_size(smb)); + } +#endif /* CONFIG_CIFS_DEBUG2 */ +} + +void cifs_dump_mids(struct TCP_Server_Info *server) +{ +#ifdef CONFIG_CIFS_DEBUG2 + struct mid_q_entry *mid_entry; + + if (server == NULL) + return; + + cifs_dbg(VFS, "Dump pending requests:\n"); + spin_lock(&server->mid_lock); + list_for_each_entry(mid_entry, &server->pending_mid_q, 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(&server->mid_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->tree_name, 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->status); + 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); + + seq_printf(m, "Serial Number: 0x%x", tcon->vol_serial_number); + + if ((tcon->seal) || + (tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) || + (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA)) + 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->use_witness) + seq_puts(m, " Witness"); + if (tcon->broken_sparse_sup) + seq_puts(m, " nosparse"); + if (tcon->need_reconnect) + seq_puts(m, "\tDISCONNECTED "); + seq_putc(m, '\n'); +} + +static void +cifs_dump_channel(struct seq_file *m, int i, struct cifs_chan *chan) +{ + struct TCP_Server_Info *server = chan->server; + + seq_printf(m, "\n\n\t\tChannel: %d ConnectionId: 0x%llx" + "\n\t\tNumber of credits: %d Dialect 0x%x" + "\n\t\tTCP status: %d Instance: %d" + "\n\t\tLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d" + "\n\t\tIn Send: %d In MaxReq Wait: %d", + i+1, server->conn_id, + server->credits, + server->dialect, + server->tcpStatus, + server->reconnect_instance, + server->srv_count, + server->sec_mode, + in_flight(server), + atomic_read(&server->in_send), + atomic_read(&server->num_waiters)); +} + +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, "\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); + if (!iface->is_active) + seq_puts(m, "\t\t[for-cleanup]\n"); +} + +static int cifs_debug_files_proc_show(struct seq_file *m, void *v) +{ + struct TCP_Server_Info *server; + struct cifs_ses *ses; + struct cifs_tcon *tcon; + struct cifsFileInfo *cfile; + + seq_puts(m, "# Version:1\n"); + seq_puts(m, "# Format:\n"); + seq_puts(m, "# <tree id> <ses id> <persistent fid> <flags> <count> <pid> <uid>"); +#ifdef CONFIG_CIFS_DEBUG2 + seq_printf(m, " <filename> <mid>\n"); +#else + seq_printf(m, " <filename>\n"); +#endif /* CIFS_DEBUG2 */ + spin_lock(&cifs_tcp_ses_lock); + list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { + list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { + list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { + spin_lock(&tcon->open_file_lock); + list_for_each_entry(cfile, &tcon->openFileList, tlist) { + seq_printf(m, + "0x%x 0x%llx 0x%llx 0x%x %d %d %d %pd", + tcon->tid, + ses->Suid, + cfile->fid.persistent_fid, + cfile->f_flags, + cfile->count, + cfile->pid, + from_kuid(&init_user_ns, cfile->uid), + cfile->dentry); +#ifdef CONFIG_CIFS_DEBUG2 + seq_printf(m, " %llu\n", cfile->fid.mid); +#else + seq_printf(m, "\n"); +#endif /* CIFS_DEBUG2 */ + } + spin_unlock(&tcon->open_file_lock); + } + } + } + spin_unlock(&cifs_tcp_ses_lock); + seq_putc(m, '\n'); + return 0; +} + +static int cifs_debug_data_proc_show(struct seq_file *m, void *v) +{ + struct mid_q_entry *mid_entry; + struct TCP_Server_Info *server; + struct TCP_Server_Info *chan_server; + struct cifs_ses *ses; + struct cifs_tcon *tcon; + struct cifs_server_iface *iface; + size_t iface_weight = 0, iface_min_speed = 0; + struct cifs_server_iface *last_iface = NULL; + int c, 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_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 + seq_printf(m, ",ACL"); +#ifdef CONFIG_CIFS_SWN_UPCALL + seq_puts(m, ",WITNESS"); +#endif + seq_putc(m, '\n'); + seq_printf(m, "CIFSMaxBufSize: %d\n", CIFSMaxBufSize); + seq_printf(m, "Active VFS Requests: %d\n", GlobalTotalActiveXid); + + seq_printf(m, "\nServers: "); + + c = 0; + spin_lock(&cifs_tcp_ses_lock); + list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { + /* channel info will be printed as a part of sessions below */ + if (CIFS_SERVER_IS_CHAN(server)) + continue; + + c++; + seq_printf(m, "\n%d) ConnectionId: 0x%llx ", + c, server->conn_id); + + spin_lock(&server->srv_lock); + if (server->hostname) + seq_printf(m, "Hostname: %s ", server->hostname); + spin_unlock(&server->srv_lock); +#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 ", + atomic_read(&server->smbd_conn->send_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->compress_algorithm == SMB3_COMPRESS_LZNT1) + seq_printf(m, " COMPRESS_LZNT1"); + else if (server->compress_algorithm == SMB3_COMPRESS_LZ77) + seq_printf(m, " COMPRESS_LZ77"); + else if (server->compress_algorithm == SMB3_COMPRESS_LZ77_HUFF) + seq_printf(m, " COMPRESS_LZ77_HUFF"); + if (server->sign) + seq_printf(m, " signed"); + if (server->posix_ext_supported) + seq_printf(m, " posix"); + if (server->nosharesock) + seq_printf(m, " nosharesock"); + + if (server->rdma) + seq_printf(m, "\nRDMA "); + seq_printf(m, "\nTCP status: %d Instance: %d" + "\nLocal Users To Server: %d SecMode: 0x%x Req On Wire: %d", + server->tcpStatus, + server->reconnect_instance, + server->srv_count, + server->sec_mode, in_flight(server)); + + seq_printf(m, "\nIn Send: %d In MaxReq Wait: %d", + atomic_read(&server->in_send), + atomic_read(&server->num_waiters)); + + seq_printf(m, "\n\n\tSessions: "); + i = 0; + list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { + spin_lock(&ses->ses_lock); + if (ses->ses_status == SES_EXITING) { + spin_unlock(&ses->ses_lock); + continue; + } + i++; + if ((ses->serverDomain == NULL) || + (ses->serverOS == NULL) || + (ses->serverNOS == NULL)) { + seq_printf(m, "\n\t%d) Address: %s Uses: %d Capability: 0x%x\tSession Status: %d ", + i, ses->ip_addr, ses->ses_count, + ses->capabilities, ses->ses_status); + if (ses->session_flags & SMB2_SESSION_FLAG_IS_GUEST) + seq_printf(m, "Guest "); + else if (ses->session_flags & SMB2_SESSION_FLAG_IS_NULL) + seq_printf(m, "Anonymous "); + } else { + seq_printf(m, + "\n\t%d) Name: %s Domain: %s Uses: %d OS: %s " + "\n\tNOS: %s\tCapability: 0x%x" + "\n\tSMB session status: %d ", + i, ses->ip_addr, ses->serverDomain, + ses->ses_count, ses->serverOS, ses->serverNOS, + ses->capabilities, ses->ses_status); + } + spin_unlock(&ses->ses_lock); + + seq_printf(m, "\n\tSecurity type: %s ", + get_security_type_str(server->ops->select_sectype(server, ses->sectype))); + + /* dump session id helpful for use with network trace */ + seq_printf(m, " SessionId: 0x%llx", ses->Suid); + if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) + seq_puts(m, " encrypted"); + if (ses->sign) + seq_puts(m, " signed"); + + seq_printf(m, "\n\tUser: %d Cred User: %d", + from_kuid(&init_user_ns, ses->linux_uid), + from_kuid(&init_user_ns, ses->cred_uid)); + + spin_lock(&ses->chan_lock); + if (CIFS_CHAN_NEEDS_RECONNECT(ses, 0)) + seq_puts(m, "\tPrimary channel: DISCONNECTED "); + if (CIFS_CHAN_IN_RECONNECT(ses, 0)) + seq_puts(m, "\t[RECONNECTING] "); + + if (ses->chan_count > 1) { + seq_printf(m, "\n\n\tExtra Channels: %zu ", + ses->chan_count-1); + for (j = 1; j < ses->chan_count; j++) { + cifs_dump_channel(m, j, &ses->chans[j]); + if (CIFS_CHAN_NEEDS_RECONNECT(ses, j)) + seq_puts(m, "\tDISCONNECTED "); + if (CIFS_CHAN_IN_RECONNECT(ses, j)) + seq_puts(m, "\t[RECONNECTING] "); + } + } + spin_unlock(&ses->chan_lock); + + seq_puts(m, "\n\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_entry(tcon, &ses->tcon_list, tcon_list) { + ++j; + seq_printf(m, "\n\t%d) ", j); + cifs_debug_tcon(m, tcon); + } + + spin_lock(&ses->iface_lock); + if (ses->iface_count) + seq_printf(m, "\n\n\tServer interfaces: %zu" + "\tLast updated: %lu seconds ago", + ses->iface_count, + (jiffies - ses->iface_last_update) / HZ); + + last_iface = list_last_entry(&ses->iface_list, + struct cifs_server_iface, + iface_head); + iface_min_speed = last_iface->speed; + + j = 0; + list_for_each_entry(iface, &ses->iface_list, + iface_head) { + seq_printf(m, "\n\t%d)", ++j); + cifs_dump_iface(m, iface); + + iface_weight = iface->speed / iface_min_speed; + seq_printf(m, "\t\tWeight (cur,total): (%zu,%zu)" + "\n\t\tAllocated channels: %u\n", + iface->weight_fulfilled, + iface_weight, + iface->num_channels); + + if (is_ses_using_iface(ses, iface)) + seq_puts(m, "\t\t[CONNECTED]\n"); + } + spin_unlock(&ses->iface_lock); + + seq_puts(m, "\n\n\tMIDs: "); + spin_lock(&ses->chan_lock); + for (j = 0; j < ses->chan_count; j++) { + chan_server = ses->chans[j].server; + if (!chan_server) + continue; + + if (list_empty(&chan_server->pending_mid_q)) + continue; + + seq_printf(m, "\n\tServer ConnectionId: 0x%llx", + chan_server->conn_id); + spin_lock(&chan_server->mid_lock); + list_for_each_entry(mid_entry, &chan_server->pending_mid_q, qhead) { + seq_printf(m, "\n\t\tState: %d com: %d pid: %d cbdata: %p mid %llu", + mid_entry->mid_state, + le16_to_cpu(mid_entry->command), + mid_entry->pid, + mid_entry->callback_data, + mid_entry->mid); + } + spin_unlock(&chan_server->mid_lock); + } + spin_unlock(&ses->chan_lock); + seq_puts(m, "\n--\n"); + } + if (i == 0) + seq_printf(m, "\n\t\t[NONE]"); + } + if (c == 0) + seq_printf(m, "\n\t[NONE]"); + + spin_unlock(&cifs_tcp_ses_lock); + seq_putc(m, '\n'); + cifs_swn_dump(m); + + /* 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 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(&total_buf_alloc_count, 0); + atomic_set(&total_small_buf_alloc_count, 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_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { + server->max_in_flight = 0; +#ifdef CONFIG_CIFS_STATS2 + for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) { + atomic_set(&server->num_cmds[i], 0); + atomic_set(&server->smb2slowcmd[i], 0); + server->time_per_cmd[i] = 0; + server->slowest_cmd[i] = 0; + server->fastest_cmd[0] = 0; + } +#endif /* CONFIG_CIFS_STATS2 */ + list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { + list_for_each_entry(tcon, &ses->tcon_list, 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 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", + buf_alloc_count.counter, + cifs_min_rcv + tcpSesAllocCount.counter); + seq_printf(m, "SMB Small Req/Resp Buffer: %d Pool size: %d\n", + small_buf_alloc_count.counter, cifs_min_small); +#ifdef CONFIG_CIFS_STATS2 + seq_printf(m, "Total Large %d Small %d Allocations\n", + atomic_read(&total_buf_alloc_count), + atomic_read(&total_small_buf_alloc_count)); +#endif /* CONFIG_CIFS_STATS2 */ + + seq_printf(m, "Operations (MIDs): %d\n", atomic_read(&mid_count)); + 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_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { + seq_printf(m, "\nMax requests in flight: %d", server->max_in_flight); +#ifdef CONFIG_CIFS_STATS2 + seq_puts(m, "\nTotal time spent processing by command. Time "); + seq_printf(m, "units are jiffies (%d per second)\n", HZ); + seq_puts(m, " SMB3 CMD\tNumber\tTotal Time\tFastest\tSlowest\n"); + seq_puts(m, " --------\t------\t----------\t-------\t-------\n"); + for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++) + seq_printf(m, " %d\t\t%d\t%llu\t\t%u\t%u\n", j, + atomic_read(&server->num_cmds[j]), + server->time_per_cmd[j], + server->fastest_cmd[j], + server->slowest_cmd[j]); + for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++) + if (atomic_read(&server->smb2slowcmd[j])) { + spin_lock(&server->srv_lock); + seq_printf(m, " %d slow responses from %s for command %d\n", + atomic_read(&server->smb2slowcmd[j]), + server->hostname, j); + spin_unlock(&server->srv_lock); + } +#endif /* STATS2 */ + list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { + list_for_each_entry(tcon, &ses->tcon_list, tcon_list) { + i++; + seq_printf(m, "\n%d) %s", i, tcon->tree_name); + 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 proc_ops cifs_stats_proc_ops = { + .proc_open = cifs_stats_proc_open, + .proc_read = seq_read, + .proc_lseek = seq_lseek, + .proc_release = single_release, + .proc_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 proc_ops cifs_##name##_proc_fops = { \ + .proc_open = name##_open, \ + .proc_read = seq_read, \ + .proc_lseek = seq_lseek, \ + .proc_release = single_release, \ + .proc_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 proc_ops cifsFYI_proc_ops; +static const struct proc_ops cifs_lookup_cache_proc_ops; +static const struct proc_ops traceSMB_proc_ops; +static const struct proc_ops cifs_security_flags_proc_ops; +static const struct proc_ops cifs_linux_ext_proc_ops; +static const struct proc_ops cifs_mount_params_proc_ops; + +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_single("open_files", 0400, proc_fs_cifs, + cifs_debug_files_proc_show); + + proc_create("Stats", 0644, proc_fs_cifs, &cifs_stats_proc_ops); + proc_create("cifsFYI", 0644, proc_fs_cifs, &cifsFYI_proc_ops); + proc_create("traceSMB", 0644, proc_fs_cifs, &traceSMB_proc_ops); + proc_create("LinuxExtensionsEnabled", 0644, proc_fs_cifs, + &cifs_linux_ext_proc_ops); + proc_create("SecurityFlags", 0644, proc_fs_cifs, + &cifs_security_flags_proc_ops); + proc_create("LookupCacheEnabled", 0644, proc_fs_cifs, + &cifs_lookup_cache_proc_ops); + + proc_create("mount_params", 0444, proc_fs_cifs, &cifs_mount_params_proc_ops); + +#ifdef CONFIG_CIFS_DFS_UPCALL + proc_create("dfscache", 0644, proc_fs_cifs, &dfscache_proc_ops); +#endif + +#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("open_files", 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); + remove_proc_entry("mount_params", proc_fs_cifs); + +#ifdef CONFIG_CIFS_DFS_UPCALL + remove_proc_entry("dfscache", proc_fs_cifs); +#endif +#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 proc_ops cifsFYI_proc_ops = { + .proc_open = cifsFYI_proc_open, + .proc_read = seq_read, + .proc_lseek = seq_lseek, + .proc_release = single_release, + .proc_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 proc_ops cifs_linux_ext_proc_ops = { + .proc_open = cifs_linux_ext_proc_open, + .proc_read = seq_read, + .proc_lseek = seq_lseek, + .proc_release = single_release, + .proc_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 proc_ops cifs_lookup_cache_proc_ops = { + .proc_open = cifs_lookup_cache_proc_open, + .proc_read = seq_read, + .proc_lseek = seq_lseek, + .proc_release = single_release, + .proc_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 proc_ops traceSMB_proc_ops = { + .proc_open = traceSMB_proc_open, + .proc_read = seq_read, + .proc_lseek = seq_lseek, + .proc_release = single_release, + .proc_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; + + *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 proc_ops cifs_security_flags_proc_ops = { + .proc_open = cifs_security_flags_proc_open, + .proc_read = seq_read, + .proc_lseek = seq_lseek, + .proc_release = single_release, + .proc_write = cifs_security_flags_proc_write, +}; + +/* To make it easier to debug, can help to show mount params */ +static int cifs_mount_params_proc_show(struct seq_file *m, void *v) +{ + const struct fs_parameter_spec *p; + const char *type; + + for (p = smb3_fs_parameters; p->name; p++) { + /* cannot use switch with pointers... */ + if (!p->type) { + if (p->flags == fs_param_neg_with_no) + type = "noflag"; + else + type = "flag"; + } else if (p->type == fs_param_is_bool) + type = "bool"; + else if (p->type == fs_param_is_u32) + type = "u32"; + else if (p->type == fs_param_is_u64) + type = "u64"; + else if (p->type == fs_param_is_string) + type = "string"; + else + type = "unknown"; + + seq_printf(m, "%s:%s\n", p->name, type); + } + + return 0; +} + +static int cifs_mount_params_proc_open(struct inode *inode, struct file *file) +{ + return single_open(file, cifs_mount_params_proc_show, NULL); +} + +static const struct proc_ops cifs_mount_params_proc_ops = { + .proc_open = cifs_mount_params_proc_open, + .proc_read = seq_read, + .proc_lseek = seq_lseek, + .proc_release = single_release, + /* No need for write for now */ + /* .proc_write = cifs_mount_params_proc_write, */ +}; + +#else +inline void cifs_proc_init(void) +{ +} + +inline void cifs_proc_clean(void) +{ +} +#endif /* PROC_FS */ |