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linux/fs/cifs/cifs_debug.c
Paulo Alcantara a1c0d00572 cifs: share dfs connections and supers 
When matching DFS superblocks we can't rely on either the server's
address or tcon's UNC name from mount(2) as the existing servers and
tcons might be connected to somewhere else.  Instead, check if
superblock is dfs, and if so, match its original source pathname with
the new mount's source pathname.

For DFS connections, instead of checking server's address, match its
referral path as it could be connected to different targets.

Signed-off-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: Steve French <stfrench@microsoft.com>
2022-12-19 08:03:12 -06:00

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// 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\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));
#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> <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%x %d %d %d %pd",
tcon->tid,
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 cifs_ses *ses;
struct cifs_tcon *tcon;
struct cifs_server_iface *iface;
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);
if (server->hostname)
seq_printf(m, "Hostname: %s ", server->hostname);
#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));
if (IS_ENABLED(CONFIG_CIFS_DFS_UPCALL)) {
if (server->origin_fullpath)
seq_printf(m, "\nDFS origin full path: %s",
server->origin_fullpath);
if (server->leaf_fullpath)
seq_printf(m, "\nDFS leaf full path: %s",
server->leaf_fullpath);
}
seq_printf(m, "\n\n\tSessions: ");
i = 0;
list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
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);
}
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",
ses->iface_count);
j = 0;
list_for_each_entry(iface, &ses->iface_list,
iface_head) {
seq_printf(m, "\n\t%d)", ++j);
cifs_dump_iface(m, iface);
if (is_ses_using_iface(ses, iface))
seq_puts(m, "\t\t[CONNECTED]\n");
}
spin_unlock(&ses->iface_lock);
}
if (i == 0)
seq_printf(m, "\n\t\t[NONE]");
seq_puts(m, "\n\n\tMIDs: ");
spin_lock(&server->mid_lock);
list_for_each_entry(mid_entry, &server->pending_mid_q, qhead) {
seq_printf(m, "\n\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(&server->mid_lock);
seq_printf(m, "\n--\n");
}
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]))
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_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 */
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