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-rw-r--r--fs/cifs/cifs_debug.c751
1 files changed, 751 insertions, 0 deletions
diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c
new file mode 100644
index 00000000..27046462
--- /dev/null
+++ b/fs/cifs/cifs_debug.c
@@ -0,0 +1,751 @@
+/*
+ * 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 <asm/uaccess.h>
+#include "cifspdu.h"
+#include "cifsglob.h"
+#include "cifsproto.h"
+#include "cifs_debug.h"
+#include "cifsfs.h"
+
+void
+cifs_dump_mem(char *label, void *data, int length)
+{
+ int i, j;
+ int *intptr = data;
+ char *charptr = data;
+ char buf[10], line[80];
+
+ printk(KERN_DEBUG "%s: dump of %d bytes of data at 0x%p\n",
+ label, length, data);
+ for (i = 0; i < length; i += 16) {
+ line[0] = 0;
+ for (j = 0; (j < 4) && (i + j * 4 < length); j++) {
+ sprintf(buf, " %08x", intptr[i / 4 + j]);
+ strcat(line, buf);
+ }
+ buf[0] = ' ';
+ buf[2] = 0;
+ for (j = 0; (j < 16) && (i + j < length); j++) {
+ buf[1] = isprint(charptr[i + j]) ? charptr[i + j] : '.';
+ strcat(line, buf);
+ }
+ printk(KERN_DEBUG "%s\n", line);
+ }
+}
+
+#ifdef CONFIG_CIFS_DEBUG2
+void cifs_dump_detail(void *buf)
+{
+ struct smb_hdr *smb = (struct smb_hdr *)buf;
+
+ cERROR(1, "Cmd: %d Err: 0x%x Flags: 0x%x Flgs2: 0x%x Mid: %d Pid: %d",
+ smb->Command, smb->Status.CifsError,
+ smb->Flags, smb->Flags2, smb->Mid, smb->Pid);
+ cERROR(1, "smb buf %p len %d", smb, smbCalcSize(smb));
+}
+
+void cifs_dump_mids(struct TCP_Server_Info *server)
+{
+ struct list_head *tmp;
+ struct mid_q_entry *mid_entry;
+
+ if (server == NULL)
+ return;
+
+ cERROR(1, "Dump pending requests:");
+ spin_lock(&GlobalMid_Lock);
+ list_for_each(tmp, &server->pending_mid_q) {
+ mid_entry = list_entry(tmp, struct mid_q_entry, qhead);
+ cERROR(1, "State: %d Cmd: %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);
+#ifdef CONFIG_CIFS_STATS2
+ cERROR(1, "IsLarge: %d buf: %p time rcv: %ld now: %ld",
+ mid_entry->large_buf,
+ mid_entry->resp_buf,
+ mid_entry->when_received,
+ jiffies);
+#endif /* STATS2 */
+ cERROR(1, "IsMult: %d IsEnd: %d", mid_entry->multiRsp,
+ mid_entry->multiEnd);
+ if (mid_entry->resp_buf) {
+ cifs_dump_detail(mid_entry->resp_buf);
+ cifs_dump_mem("existing buf: ",
+ mid_entry->resp_buf, 62);
+ }
+ }
+ spin_unlock(&GlobalMid_Lock);
+}
+#endif /* CONFIG_CIFS_DEBUG2 */
+
+#ifdef CONFIG_PROC_FS
+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;
+ __u32 dev_type;
+
+ 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_WEAK_PW_HASH
+ seq_printf(m, " lanman");
+#endif
+#ifdef CONFIG_CIFS_POSIX
+ seq_printf(m, " posix");
+#endif
+#ifdef CONFIG_CIFS_UPCALL
+ seq_printf(m, " 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);
+ 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) entry for %s not fully "
+ "displayed\n\t", i, ses->serverName);
+ } 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);
+ }
+ 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;
+ list_for_each(tmp3, &ses->tcon_list) {
+ tcon = list_entry(tmp3, struct cifs_tcon,
+ tcon_list);
+ ++j;
+ dev_type = le32_to_cpu(tcon->fsDevInfo.DeviceType);
+ seq_printf(m, "\n\t%d) %s Mounts: %d ", j,
+ tcon->treeName, tcon->tc_count);
+ if (tcon->nativeFileSystem) {
+ seq_printf(m, "Type: %s ",
+ tcon->nativeFileSystem);
+ }
+ seq_printf(m, "DevInfo: 0x%x Attributes: 0x%x"
+ "\nPathComponentMax: %d Status: 0x%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->need_reconnect)
+ seq_puts(m, "\tDISCONNECTED ");
+ seq_putc(m, '\n');
+ }
+
+ 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_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 int cifs_debug_data_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, cifs_debug_data_proc_show, NULL);
+}
+
+static const struct file_operations cifs_debug_data_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = cifs_debug_data_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+#ifdef CONFIG_CIFS_STATS
+static ssize_t cifs_stats_proc_write(struct file *file,
+ const char __user *buffer, size_t count, loff_t *ppos)
+{
+ char c;
+ int rc;
+ struct list_head *tmp1, *tmp2, *tmp3;
+ struct TCP_Server_Info *server;
+ struct cifs_ses *ses;
+ struct cifs_tcon *tcon;
+
+ rc = get_user(c, buffer);
+ if (rc)
+ return rc;
+
+ if (c == '1' || c == 'y' || c == 'Y' || c == '0') {
+#ifdef CONFIG_CIFS_STATS2
+ atomic_set(&totBufAllocCount, 0);
+ atomic_set(&totSmBufAllocCount, 0);
+#endif /* CONFIG_CIFS_STATS2 */
+ 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);
+ 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);
+ atomic_set(&tcon->num_writes, 0);
+ atomic_set(&tcon->num_reads, 0);
+ atomic_set(&tcon->num_oplock_brks, 0);
+ atomic_set(&tcon->num_opens, 0);
+ atomic_set(&tcon->num_posixopens, 0);
+ atomic_set(&tcon->num_posixmkdirs, 0);
+ atomic_set(&tcon->num_closes, 0);
+ atomic_set(&tcon->num_deletes, 0);
+ atomic_set(&tcon->num_mkdirs, 0);
+ atomic_set(&tcon->num_rmdirs, 0);
+ atomic_set(&tcon->num_renames, 0);
+ atomic_set(&tcon->num_t2renames, 0);
+ atomic_set(&tcon->num_ffirst, 0);
+ atomic_set(&tcon->num_fnext, 0);
+ atomic_set(&tcon->num_fclose, 0);
+ atomic_set(&tcon->num_hardlinks, 0);
+ atomic_set(&tcon->num_symlinks, 0);
+ atomic_set(&tcon->num_locks, 0);
+ }
+ }
+ }
+ spin_unlock(&cifs_tcp_ses_lock);
+ }
+
+ return count;
+}
+
+static int cifs_stats_proc_show(struct seq_file *m, void *v)
+{
+ int i;
+ 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);
+ 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 Oplock Breaks: %d",
+ atomic_read(&tcon->num_smbs_sent),
+ atomic_read(&tcon->num_oplock_brks));
+ seq_printf(m, "\nReads: %d Bytes: %lld",
+ atomic_read(&tcon->num_reads),
+ (long long)(tcon->bytes_read));
+ seq_printf(m, "\nWrites: %d Bytes: %lld",
+ atomic_read(&tcon->num_writes),
+ (long long)(tcon->bytes_written));
+ seq_printf(m, "\nFlushes: %d",
+ atomic_read(&tcon->num_flushes));
+ seq_printf(m, "\nLocks: %d HardLinks: %d "
+ "Symlinks: %d",
+ atomic_read(&tcon->num_locks),
+ atomic_read(&tcon->num_hardlinks),
+ atomic_read(&tcon->num_symlinks));
+ seq_printf(m, "\nOpens: %d Closes: %d "
+ "Deletes: %d",
+ atomic_read(&tcon->num_opens),
+ atomic_read(&tcon->num_closes),
+ atomic_read(&tcon->num_deletes));
+ seq_printf(m, "\nPosix Opens: %d "
+ "Posix Mkdirs: %d",
+ atomic_read(&tcon->num_posixopens),
+ atomic_read(&tcon->num_posixmkdirs));
+ seq_printf(m, "\nMkdirs: %d Rmdirs: %d",
+ atomic_read(&tcon->num_mkdirs),
+ atomic_read(&tcon->num_rmdirs));
+ seq_printf(m, "\nRenames: %d T2 Renames %d",
+ atomic_read(&tcon->num_renames),
+ atomic_read(&tcon->num_t2renames));
+ seq_printf(m, "\nFindFirst: %d FNext %d "
+ "FClose %d",
+ atomic_read(&tcon->num_ffirst),
+ atomic_read(&tcon->num_fnext),
+ atomic_read(&tcon->num_fclose));
+ }
+ }
+ }
+ 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 = {
+ .owner = THIS_MODULE,
+ .open = cifs_stats_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .write = cifs_stats_proc_write,
+};
+#endif /* STATS */
+
+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_multiuser_mount_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("DebugData", 0, proc_fs_cifs, &cifs_debug_data_proc_fops);
+
+#ifdef CONFIG_CIFS_STATS
+ proc_create("Stats", 0, proc_fs_cifs, &cifs_stats_proc_fops);
+#endif /* STATS */
+ proc_create("cifsFYI", 0, proc_fs_cifs, &cifsFYI_proc_fops);
+ proc_create("traceSMB", 0, proc_fs_cifs, &traceSMB_proc_fops);
+ proc_create("LinuxExtensionsEnabled", 0, proc_fs_cifs,
+ &cifs_linux_ext_proc_fops);
+ proc_create("MultiuserMount", 0, proc_fs_cifs,
+ &cifs_multiuser_mount_proc_fops);
+ proc_create("SecurityFlags", 0, proc_fs_cifs,
+ &cifs_security_flags_proc_fops);
+ proc_create("LookupCacheEnabled", 0, proc_fs_cifs,
+ &cifs_lookup_cache_proc_fops);
+}
+
+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);
+#ifdef CONFIG_CIFS_STATS
+ remove_proc_entry("Stats", proc_fs_cifs);
+#endif
+ remove_proc_entry("MultiuserMount", 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("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;
+ int rc;
+
+ rc = get_user(c, buffer);
+ if (rc)
+ return rc;
+ if (c == '0' || c == 'n' || c == 'N')
+ cifsFYI = 0;
+ else if (c == '1' || c == 'y' || c == 'Y')
+ cifsFYI = 1;
+ else if ((c > '1') && (c <= '9'))
+ cifsFYI = (int) (c - '0'); /* see cifs_debug.h for meanings */
+
+ return count;
+}
+
+static const struct file_operations cifsFYI_proc_fops = {
+ .owner = THIS_MODULE,
+ .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)
+{
+ char c;
+ int rc;
+
+ rc = get_user(c, buffer);
+ if (rc)
+ return rc;
+ if (c == '0' || c == 'n' || c == 'N')
+ linuxExtEnabled = 0;
+ else if (c == '1' || c == 'y' || c == 'Y')
+ linuxExtEnabled = 1;
+
+ return count;
+}
+
+static const struct file_operations cifs_linux_ext_proc_fops = {
+ .owner = THIS_MODULE,
+ .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)
+{
+ char c;
+ int rc;
+
+ rc = get_user(c, buffer);
+ if (rc)
+ return rc;
+ if (c == '0' || c == 'n' || c == 'N')
+ lookupCacheEnabled = 0;
+ else if (c == '1' || c == 'y' || c == 'Y')
+ lookupCacheEnabled = 1;
+
+ return count;
+}
+
+static const struct file_operations cifs_lookup_cache_proc_fops = {
+ .owner = THIS_MODULE,
+ .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)
+{
+ char c;
+ int rc;
+
+ rc = get_user(c, buffer);
+ if (rc)
+ return rc;
+ if (c == '0' || c == 'n' || c == 'N')
+ traceSMB = 0;
+ else if (c == '1' || c == 'y' || c == 'Y')
+ traceSMB = 1;
+
+ return count;
+}
+
+static const struct file_operations traceSMB_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = traceSMB_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .write = traceSMB_proc_write,
+};
+
+static int cifs_multiuser_mount_proc_show(struct seq_file *m, void *v)
+{
+ seq_printf(m, "%d\n", multiuser_mount);
+ return 0;
+}
+
+static int cifs_multiuser_mount_proc_open(struct inode *inode, struct file *fh)
+{
+ return single_open(fh, cifs_multiuser_mount_proc_show, NULL);
+}
+
+static ssize_t cifs_multiuser_mount_proc_write(struct file *file,
+ const char __user *buffer, size_t count, loff_t *ppos)
+{
+ char c;
+ int rc;
+ static bool warned;
+
+ rc = get_user(c, buffer);
+ if (rc)
+ return rc;
+ if (c == '0' || c == 'n' || c == 'N')
+ multiuser_mount = 0;
+ else if (c == '1' || c == 'y' || c == 'Y') {
+ multiuser_mount = 1;
+ if (!warned) {
+ warned = true;
+ printk(KERN_WARNING "CIFS VFS: The legacy multiuser "
+ "mount code is scheduled to be deprecated in "
+ "3.5. Please switch to using the multiuser "
+ "mount option.");
+ }
+ }
+
+ return count;
+}
+
+static const struct file_operations cifs_multiuser_mount_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = cifs_multiuser_mount_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .write = cifs_multiuser_mount_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);
+}
+
+static ssize_t cifs_security_flags_proc_write(struct file *file,
+ const char __user *buffer, size_t count, loff_t *ppos)
+{
+ unsigned int flags;
+ char flags_string[12];
+ char c;
+
+ 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 */
+ c = flags_string[0];
+ if (c == '0' || c == 'n' || c == 'N') {
+ global_secflags = CIFSSEC_DEF; /* default */
+ return count;
+ } else if (c == '1' || c == 'y' || c == 'Y') {
+ global_secflags = CIFSSEC_MAX;
+ return count;
+ } else if (!isdigit(c)) {
+ cERROR(1, "invalid flag %c", c);
+ return -EINVAL;
+ }
+ }
+ /* else we have a number */
+
+ flags = simple_strtoul(flags_string, NULL, 0);
+
+ cFYI(1, "sec flags 0x%x", flags);
+
+ if (flags <= 0) {
+ cERROR(1, "invalid security flags %s", flags_string);
+ return -EINVAL;
+ }
+
+ if (flags & ~CIFSSEC_MASK) {
+ cERROR(1, "attempt to set unsupported security flags 0x%x",
+ flags & ~CIFSSEC_MASK);
+ return -EINVAL;
+ }
+ /* 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;
+ cFYI(1, "packet signing now required");
+ } else if ((global_secflags & CIFSSEC_MAY_SIGN) == 0) {
+ cFYI(1, "packet signing disabled");
+ }
+ /* BB should we turn on MAY flags for other MUST options? */
+ return count;
+}
+
+static const struct file_operations cifs_security_flags_proc_fops = {
+ .owner = THIS_MODULE,
+ .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 */
generated by cgit (git 2.34.1) at 2025-01-13 02:45:19 +0000