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linux/fs/cifs/cifs_debug.c
Paul Aurich aadd69cad0 cifs: Display local UID details for SMB sessions in DebugData 
This is useful for distinguishing SMB sessions on a multiuser mount.

Signed-off-by: Paul Aurich <paul@darkrain42.org>
Signed-off-by: Steve French <stfrench@microsoft.com>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
2020-07-01 19:38:19 -05:00

1003 lines
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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* fs/cifs_debug.c
*
* 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"
#ifdef CONFIG_CIFS_DFS_UPCALL
#include "dfs_cache.h"
#endif
#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);
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->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, "\t\tChannel %d Number of credits: %d Dialect 0x%x "
"TCP status: %d Instance: %d Local Users To Server: %d "
"SecMode: 0x%x Req On Wire: %d In Send: %d "
"In MaxReq Wait: %d\n",
i+1,
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);
}
static int cifs_debug_files_proc_show(struct seq_file *m, void *v)
{
struct list_head *stmp, *tmp, *tmp1, *tmp2;
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(stmp, &cifs_tcp_ses_list) {
server = list_entry(stmp, struct TCP_Server_Info,
tcp_ses_list);
list_for_each(tmp, &server->smb_ses_list) {
ses = list_entry(tmp, struct cifs_ses, smb_ses_list);
list_for_each(tmp1, &ses->tcon_list) {
tcon = list_entry(tmp1, struct cifs_tcon, tcon_list);
spin_lock(&tcon->open_file_lock);
list_for_each(tmp2, &tcon->openFileList) {
cfile = list_entry(tmp2, struct cifsFileInfo,
tlist);
seq_printf(m,
"0x%x 0x%llx 0x%x %d %d %d %s",
tcon->tid,
cfile->fid.persistent_fid,
cfile->f_flags,
cfile->count,
cfile->pid,
from_kuid(&init_user_ns, cfile->uid),
cfile->dentry->d_name.name);
#ifdef CONFIG_CIFS_DEBUG2
seq_printf(m, " 0x%llx\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 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
seq_printf(m, ",ACL");
seq_putc(m, '\n');
seq_printf(m, "CIFSMaxBufSize: %d\n", CIFSMaxBufSize);
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 ",
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");
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 ",
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 ",
i, ses->serverName, ses->serverDomain,
ses->ses_count, ses->serverOS, ses->serverNOS,
ses->capabilities, ses->status);
}
seq_printf(m,"Security type: %s\n",
get_security_type_str(server->ops->select_sectype(server, ses->sectype)));
if (server->rdma)
seq_printf(m, "RDMA\n\t");
seq_printf(m, "TCP status: %d Instance: %d\n\tLocal 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, " In Send: %d In MaxReq Wait: %d",
atomic_read(&server->in_send),
atomic_read(&server->num_waiters));
/* 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));
if (ses->chan_count > 1) {
seq_printf(m, "\n\n\tExtra Channels: %zu\n",
ses->chan_count-1);
for (j = 1; j < ses->chan_count; j++)
cifs_dump_channel(m, j, &ses->chans[j]);
}
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(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++) {
struct cifs_server_iface *iface;
iface = &ses->iface_list[j];
seq_printf(m, "\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);
}
}
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);
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(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);
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(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 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;
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);
#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);
#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;
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 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,
};
#else
inline void cifs_proc_init(void)
{
}
inline void cifs_proc_clean(void)
{
}
#endif /* PROC_FS */
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