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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * fs/cifs/cifsfs.c | |
3 | * | |
2b280fab | 4 | * Copyright (C) International Business Machines Corp., 2002,2008 |
1da177e4 LT |
5 | * Author(s): Steve French (sfrench@us.ibm.com) |
6 | * | |
7 | * Common Internet FileSystem (CIFS) client | |
8 | * | |
9 | * This library is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU Lesser General Public License as published | |
11 | * by the Free Software Foundation; either version 2.1 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This library is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
17 | * the GNU Lesser General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU Lesser General Public License | |
20 | * along with this library; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
22 | */ | |
23 | ||
24 | /* Note that BB means BUGBUG (ie something to fix eventually) */ | |
25 | ||
26 | #include <linux/module.h> | |
27 | #include <linux/fs.h> | |
28 | #include <linux/mount.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/init.h> | |
31 | #include <linux/list.h> | |
32 | #include <linux/seq_file.h> | |
33 | #include <linux/vfs.h> | |
34 | #include <linux/mempool.h> | |
6ab16d24 | 35 | #include <linux/delay.h> |
45af7a0f | 36 | #include <linux/kthread.h> |
7dfb7103 | 37 | #include <linux/freezer.h> |
3eb9a889 | 38 | #include <net/ipv6.h> |
1da177e4 LT |
39 | #include "cifsfs.h" |
40 | #include "cifspdu.h" | |
41 | #define DECLARE_GLOBALS_HERE | |
42 | #include "cifsglob.h" | |
43 | #include "cifsproto.h" | |
44 | #include "cifs_debug.h" | |
45 | #include "cifs_fs_sb.h" | |
46 | #include <linux/mm.h> | |
84a15b93 | 47 | #include <linux/key-type.h> |
e545937a | 48 | #include "cifs_spnego.h" |
f579cf3c | 49 | #include "fscache.h" |
1da177e4 LT |
50 | #define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */ |
51 | ||
1da177e4 LT |
52 | int cifsFYI = 0; |
53 | int cifsERROR = 1; | |
54 | int traceSMB = 0; | |
55 | unsigned int oplockEnabled = 1; | |
1da177e4 LT |
56 | unsigned int linuxExtEnabled = 1; |
57 | unsigned int lookupCacheEnabled = 1; | |
58 | unsigned int multiuser_mount = 0; | |
04912d6a | 59 | unsigned int global_secflags = CIFSSEC_DEF; |
3979877e | 60 | /* unsigned int ntlmv2_support = 0; */ |
1da177e4 | 61 | unsigned int sign_CIFS_PDUs = 1; |
ee9b6d61 | 62 | static const struct super_operations cifs_super_ops; |
1da177e4 LT |
63 | unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE; |
64 | module_param(CIFSMaxBufSize, int, 0); | |
63135e08 SF |
65 | MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). " |
66 | "Default: 16384 Range: 8192 to 130048"); | |
1da177e4 LT |
67 | unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL; |
68 | module_param(cifs_min_rcv, int, 0); | |
63135e08 SF |
69 | MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: " |
70 | "1 to 64"); | |
1da177e4 LT |
71 | unsigned int cifs_min_small = 30; |
72 | module_param(cifs_min_small, int, 0); | |
63135e08 SF |
73 | MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 " |
74 | "Range: 2 to 256"); | |
1da177e4 LT |
75 | unsigned int cifs_max_pending = CIFS_MAX_REQ; |
76 | module_param(cifs_max_pending, int, 0); | |
63135e08 SF |
77 | MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. " |
78 | "Default: 50 Range: 2 to 256"); | |
fda35943 SF |
79 | unsigned short echo_retries = 5; |
80 | module_param(echo_retries, ushort, 0644); | |
81 | MODULE_PARM_DESC(echo_retries, "Number of echo attempts before giving up and " | |
82 | "reconnecting server. Default: 5. 0 means " | |
83 | "never reconnect."); | |
bdf1b03e JL |
84 | bool sign_zero_copy; /* globals init to false automatically */ |
85 | module_param(sign_zero_copy, bool, 0644); | |
86 | MODULE_PARM_DESC(sign_zero_copy, "Don't copy pages on write with signing " | |
87 | "enabled. Default: N"); | |
1da177e4 LT |
88 | extern mempool_t *cifs_sm_req_poolp; |
89 | extern mempool_t *cifs_req_poolp; | |
90 | extern mempool_t *cifs_mid_poolp; | |
91 | ||
d7c86ff8 JL |
92 | void |
93 | cifs_sb_active(struct super_block *sb) | |
94 | { | |
95 | struct cifs_sb_info *server = CIFS_SB(sb); | |
96 | ||
97 | if (atomic_inc_return(&server->active) == 1) | |
98 | atomic_inc(&sb->s_active); | |
99 | } | |
100 | ||
101 | void | |
102 | cifs_sb_deactive(struct super_block *sb) | |
103 | { | |
104 | struct cifs_sb_info *server = CIFS_SB(sb); | |
105 | ||
106 | if (atomic_dec_and_test(&server->active)) | |
107 | deactivate_super(sb); | |
108 | } | |
109 | ||
1da177e4 LT |
110 | static int |
111 | cifs_read_super(struct super_block *sb, void *data, | |
112 | const char *devname, int silent) | |
113 | { | |
114 | struct inode *inode; | |
115 | struct cifs_sb_info *cifs_sb; | |
116 | int rc = 0; | |
50c2f753 | 117 | |
1b2b2126 SF |
118 | /* BB should we make this contingent on mount parm? */ |
119 | sb->s_flags |= MS_NODIRATIME | MS_NOATIME; | |
790fe579 | 120 | sb->s_fs_info = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL); |
1da177e4 | 121 | cifs_sb = CIFS_SB(sb); |
4523cc30 | 122 | if (cifs_sb == NULL) |
1da177e4 | 123 | return -ENOMEM; |
1da177e4 | 124 | |
0dd12c21 | 125 | spin_lock_init(&cifs_sb->tlink_tree_lock); |
b647c35f | 126 | cifs_sb->tlink_tree = RB_ROOT; |
0dd12c21 | 127 | |
8044f7f4 JA |
128 | rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY); |
129 | if (rc) { | |
130 | kfree(cifs_sb); | |
131 | return rc; | |
132 | } | |
133 | ||
e6ab1582 IM |
134 | #ifdef CONFIG_CIFS_DFS_UPCALL |
135 | /* copy mount params to sb for use in submounts */ | |
136 | /* BB: should we move this after the mount so we | |
137 | * do not have to do the copy on failed mounts? | |
138 | * BB: May be it is better to do simple copy before | |
139 | * complex operation (mount), and in case of fail | |
140 | * just exit instead of doing mount and attempting | |
141 | * undo it if this copy fails?*/ | |
79ee9a8b SF |
142 | if (data) { |
143 | int len = strlen(data); | |
144 | cifs_sb->mountdata = kzalloc(len + 1, GFP_KERNEL); | |
145 | if (cifs_sb->mountdata == NULL) { | |
8044f7f4 | 146 | bdi_destroy(&cifs_sb->bdi); |
79ee9a8b SF |
147 | kfree(sb->s_fs_info); |
148 | sb->s_fs_info = NULL; | |
149 | return -ENOMEM; | |
150 | } | |
151 | strncpy(cifs_sb->mountdata, data, len + 1); | |
152 | cifs_sb->mountdata[len] = '\0'; | |
e6ab1582 | 153 | } |
e6ab1582 IM |
154 | #endif |
155 | ||
1da177e4 LT |
156 | rc = cifs_mount(sb, cifs_sb, data, devname); |
157 | ||
158 | if (rc) { | |
159 | if (!silent) | |
b6b38f70 | 160 | cERROR(1, "cifs_mount failed w/return code = %d", rc); |
1da177e4 LT |
161 | goto out_mount_failed; |
162 | } | |
163 | ||
164 | sb->s_magic = CIFS_MAGIC_NUMBER; | |
165 | sb->s_op = &cifs_super_ops; | |
8044f7f4 | 166 | sb->s_bdi = &cifs_sb->bdi; |
1da177e4 LT |
167 | sb->s_blocksize = CIFS_MAX_MSGSIZE; |
168 | sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */ | |
bd433d4c | 169 | inode = cifs_root_iget(sb, ROOT_I); |
1da177e4 | 170 | |
ce634ab2 DH |
171 | if (IS_ERR(inode)) { |
172 | rc = PTR_ERR(inode); | |
173 | inode = NULL; | |
1da177e4 LT |
174 | goto out_no_root; |
175 | } | |
176 | ||
177 | sb->s_root = d_alloc_root(inode); | |
178 | ||
179 | if (!sb->s_root) { | |
180 | rc = -ENOMEM; | |
181 | goto out_no_root; | |
182 | } | |
50c2f753 | 183 | |
1c929cfe AV |
184 | /* do that *after* d_alloc_root() - we want NULL ->d_op for root here */ |
185 | if (cifs_sb_master_tcon(cifs_sb)->nocase) | |
186 | sb->s_d_op = &cifs_ci_dentry_ops; | |
187 | else | |
188 | sb->s_d_op = &cifs_dentry_ops; | |
189 | ||
7521a3c5 SF |
190 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
191 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { | |
b6b38f70 | 192 | cFYI(1, "export ops supported"); |
7521a3c5 SF |
193 | sb->s_export_op = &cifs_export_ops; |
194 | } | |
195 | #endif /* EXPERIMENTAL */ | |
1da177e4 LT |
196 | |
197 | return 0; | |
198 | ||
199 | out_no_root: | |
b6b38f70 | 200 | cERROR(1, "cifs_read_super: get root inode failed"); |
1da177e4 LT |
201 | if (inode) |
202 | iput(inode); | |
54b4602d | 203 | |
2c731afb | 204 | cifs_umount(sb, cifs_sb); |
1da177e4 LT |
205 | |
206 | out_mount_failed: | |
4523cc30 | 207 | if (cifs_sb) { |
e6ab1582 IM |
208 | #ifdef CONFIG_CIFS_DFS_UPCALL |
209 | if (cifs_sb->mountdata) { | |
210 | kfree(cifs_sb->mountdata); | |
211 | cifs_sb->mountdata = NULL; | |
212 | } | |
213 | #endif | |
6d729e44 | 214 | unload_nls(cifs_sb->local_nls); |
8044f7f4 | 215 | bdi_destroy(&cifs_sb->bdi); |
1da177e4 LT |
216 | kfree(cifs_sb); |
217 | } | |
218 | return rc; | |
219 | } | |
220 | ||
221 | static void | |
222 | cifs_put_super(struct super_block *sb) | |
223 | { | |
224 | int rc = 0; | |
225 | struct cifs_sb_info *cifs_sb; | |
226 | ||
b6b38f70 | 227 | cFYI(1, "In cifs_put_super"); |
1da177e4 | 228 | cifs_sb = CIFS_SB(sb); |
4523cc30 | 229 | if (cifs_sb == NULL) { |
b6b38f70 | 230 | cFYI(1, "Empty cifs superblock info passed to unmount"); |
1da177e4 LT |
231 | return; |
232 | } | |
6cfd0148 | 233 | |
790fe579 | 234 | rc = cifs_umount(sb, cifs_sb); |
ad7a2926 | 235 | if (rc) |
b6b38f70 | 236 | cERROR(1, "cifs_umount failed with return code %d", rc); |
e6ab1582 IM |
237 | #ifdef CONFIG_CIFS_DFS_UPCALL |
238 | if (cifs_sb->mountdata) { | |
239 | kfree(cifs_sb->mountdata); | |
240 | cifs_sb->mountdata = NULL; | |
241 | } | |
242 | #endif | |
243 | ||
1da177e4 | 244 | unload_nls(cifs_sb->local_nls); |
8044f7f4 | 245 | bdi_destroy(&cifs_sb->bdi); |
1da177e4 | 246 | kfree(cifs_sb); |
1da177e4 LT |
247 | } |
248 | ||
249 | static int | |
726c3342 | 250 | cifs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 251 | { |
726c3342 | 252 | struct super_block *sb = dentry->d_sb; |
39da9847 | 253 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
0d424ad0 | 254 | struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb); |
c81156dd | 255 | int rc = -EOPNOTSUPP; |
39da9847 | 256 | int xid; |
1da177e4 LT |
257 | |
258 | xid = GetXid(); | |
259 | ||
1da177e4 LT |
260 | buf->f_type = CIFS_MAGIC_NUMBER; |
261 | ||
39da9847 SF |
262 | /* |
263 | * PATH_MAX may be too long - it would presumably be total path, | |
264 | * but note that some servers (includinng Samba 3) have a shorter | |
265 | * maximum path. | |
266 | * | |
267 | * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO. | |
268 | */ | |
269 | buf->f_namelen = PATH_MAX; | |
1da177e4 LT |
270 | buf->f_files = 0; /* undefined */ |
271 | buf->f_ffree = 0; /* unlimited */ | |
272 | ||
39da9847 SF |
273 | /* |
274 | * We could add a second check for a QFS Unix capability bit | |
275 | */ | |
276 | if ((tcon->ses->capabilities & CAP_UNIX) && | |
277 | (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability))) | |
278 | rc = CIFSSMBQFSPosixInfo(xid, tcon, buf); | |
279 | ||
280 | /* | |
281 | * Only need to call the old QFSInfo if failed on newer one, | |
282 | * e.g. by OS/2. | |
283 | **/ | |
284 | if (rc && (tcon->ses->capabilities & CAP_NT_SMBS)) | |
285 | rc = CIFSSMBQFSInfo(xid, tcon, buf); | |
286 | ||
287 | /* | |
288 | * Some old Windows servers also do not support level 103, retry with | |
289 | * older level one if old server failed the previous call or we | |
290 | * bypassed it because we detected that this was an older LANMAN sess | |
291 | */ | |
4523cc30 | 292 | if (rc) |
39da9847 SF |
293 | rc = SMBOldQFSInfo(xid, tcon, buf); |
294 | ||
1da177e4 | 295 | FreeXid(xid); |
39da9847 | 296 | return 0; |
1da177e4 LT |
297 | } |
298 | ||
b74c79e9 | 299 | static int cifs_permission(struct inode *inode, int mask, unsigned int flags) |
1da177e4 LT |
300 | { |
301 | struct cifs_sb_info *cifs_sb; | |
302 | ||
b74c79e9 NP |
303 | if (flags & IPERM_FLAG_RCU) |
304 | return -ECHILD; | |
305 | ||
1da177e4 LT |
306 | cifs_sb = CIFS_SB(inode->i_sb); |
307 | ||
f696a365 MS |
308 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) { |
309 | if ((mask & MAY_EXEC) && !execute_ok(inode)) | |
310 | return -EACCES; | |
311 | else | |
312 | return 0; | |
313 | } else /* file mode might have been restricted at mount time | |
50c2f753 | 314 | on the client (above and beyond ACL on servers) for |
1da177e4 | 315 | servers which do not support setting and viewing mode bits, |
50c2f753 | 316 | so allowing client to check permissions is useful */ |
b74c79e9 | 317 | return generic_permission(inode, mask, flags, NULL); |
1da177e4 LT |
318 | } |
319 | ||
e18b890b CL |
320 | static struct kmem_cache *cifs_inode_cachep; |
321 | static struct kmem_cache *cifs_req_cachep; | |
322 | static struct kmem_cache *cifs_mid_cachep; | |
e18b890b | 323 | static struct kmem_cache *cifs_sm_req_cachep; |
1da177e4 LT |
324 | mempool_t *cifs_sm_req_poolp; |
325 | mempool_t *cifs_req_poolp; | |
326 | mempool_t *cifs_mid_poolp; | |
327 | ||
328 | static struct inode * | |
329 | cifs_alloc_inode(struct super_block *sb) | |
330 | { | |
331 | struct cifsInodeInfo *cifs_inode; | |
e94b1766 | 332 | cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
333 | if (!cifs_inode) |
334 | return NULL; | |
335 | cifs_inode->cifsAttrs = 0x20; /* default */ | |
1da177e4 LT |
336 | cifs_inode->time = 0; |
337 | /* Until the file is open and we have gotten oplock | |
338 | info back from the server, can not assume caching of | |
339 | file data or metadata */ | |
c6723628 | 340 | cifs_set_oplock_level(cifs_inode, 0); |
9a8165fc | 341 | cifs_inode->delete_pending = false; |
df2cf170 | 342 | cifs_inode->invalid_mapping = false; |
1da177e4 | 343 | cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */ |
fbec9ab9 | 344 | cifs_inode->server_eof = 0; |
20054bd6 JL |
345 | cifs_inode->uniqueid = 0; |
346 | cifs_inode->createtime = 0; | |
50c2f753 | 347 | |
1b2b2126 SF |
348 | /* Can not set i_flags here - they get immediately overwritten |
349 | to zero by the VFS */ | |
350 | /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/ | |
1da177e4 LT |
351 | INIT_LIST_HEAD(&cifs_inode->openFileList); |
352 | return &cifs_inode->vfs_inode; | |
353 | } | |
354 | ||
fa0d7e3d NP |
355 | static void cifs_i_callback(struct rcu_head *head) |
356 | { | |
357 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
358 | INIT_LIST_HEAD(&inode->i_dentry); | |
359 | kmem_cache_free(cifs_inode_cachep, CIFS_I(inode)); | |
360 | } | |
361 | ||
1da177e4 LT |
362 | static void |
363 | cifs_destroy_inode(struct inode *inode) | |
364 | { | |
fa0d7e3d | 365 | call_rcu(&inode->i_rcu, cifs_i_callback); |
1da177e4 LT |
366 | } |
367 | ||
9451a9a5 | 368 | static void |
b57922d9 | 369 | cifs_evict_inode(struct inode *inode) |
9451a9a5 | 370 | { |
b57922d9 AV |
371 | truncate_inode_pages(&inode->i_data, 0); |
372 | end_writeback(inode); | |
9451a9a5 SJ |
373 | cifs_fscache_release_inode_cookie(inode); |
374 | } | |
375 | ||
61f98ffd JL |
376 | static void |
377 | cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server) | |
378 | { | |
a9f1b85e PS |
379 | struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr; |
380 | struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr; | |
381 | ||
61f98ffd JL |
382 | seq_printf(s, ",addr="); |
383 | ||
a9f1b85e | 384 | switch (server->dstaddr.ss_family) { |
61f98ffd | 385 | case AF_INET: |
a9f1b85e | 386 | seq_printf(s, "%pI4", &sa->sin_addr.s_addr); |
61f98ffd JL |
387 | break; |
388 | case AF_INET6: | |
a9f1b85e PS |
389 | seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr); |
390 | if (sa6->sin6_scope_id) | |
391 | seq_printf(s, "%%%u", sa6->sin6_scope_id); | |
61f98ffd JL |
392 | break; |
393 | default: | |
394 | seq_printf(s, "(unknown)"); | |
395 | } | |
396 | } | |
397 | ||
1da177e4 LT |
398 | /* |
399 | * cifs_show_options() is for displaying mount options in /proc/mounts. | |
400 | * Not all settable options are displayed but most of the important | |
401 | * ones are. | |
402 | */ | |
403 | static int | |
404 | cifs_show_options(struct seq_file *s, struct vfsmount *m) | |
405 | { | |
8e047d09 | 406 | struct cifs_sb_info *cifs_sb = CIFS_SB(m->mnt_sb); |
0d424ad0 | 407 | struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb); |
3eb9a889 BG |
408 | struct sockaddr *srcaddr; |
409 | srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr; | |
8616e0fc | 410 | |
8e047d09 | 411 | seq_printf(s, ",unc=%s", tcon->treeName); |
29e07c82 JL |
412 | |
413 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) | |
414 | seq_printf(s, ",multiuser"); | |
8727c8a8 SF |
415 | else if (tcon->ses->user_name) |
416 | seq_printf(s, ",username=%s", tcon->ses->user_name); | |
29e07c82 | 417 | |
8616e0fc JL |
418 | if (tcon->ses->domainName) |
419 | seq_printf(s, ",domain=%s", tcon->ses->domainName); | |
420 | ||
3eb9a889 BG |
421 | if (srcaddr->sa_family != AF_UNSPEC) { |
422 | struct sockaddr_in *saddr4; | |
423 | struct sockaddr_in6 *saddr6; | |
424 | saddr4 = (struct sockaddr_in *)srcaddr; | |
425 | saddr6 = (struct sockaddr_in6 *)srcaddr; | |
426 | if (srcaddr->sa_family == AF_INET6) | |
427 | seq_printf(s, ",srcaddr=%pI6c", | |
428 | &saddr6->sin6_addr); | |
429 | else if (srcaddr->sa_family == AF_INET) | |
430 | seq_printf(s, ",srcaddr=%pI4", | |
431 | &saddr4->sin_addr.s_addr); | |
432 | else | |
433 | seq_printf(s, ",srcaddr=BAD-AF:%i", | |
434 | (int)(srcaddr->sa_family)); | |
435 | } | |
436 | ||
8616e0fc | 437 | seq_printf(s, ",uid=%d", cifs_sb->mnt_uid); |
340481a3 JL |
438 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) |
439 | seq_printf(s, ",forceuid"); | |
4486d6ed JL |
440 | else |
441 | seq_printf(s, ",noforceuid"); | |
340481a3 | 442 | |
8616e0fc | 443 | seq_printf(s, ",gid=%d", cifs_sb->mnt_gid); |
340481a3 JL |
444 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) |
445 | seq_printf(s, ",forcegid"); | |
4486d6ed JL |
446 | else |
447 | seq_printf(s, ",noforcegid"); | |
8616e0fc | 448 | |
61f98ffd | 449 | cifs_show_address(s, tcon->ses->server); |
1da177e4 | 450 | |
8616e0fc JL |
451 | if (!tcon->unix_ext) |
452 | seq_printf(s, ",file_mode=0%o,dir_mode=0%o", | |
2b280fab SF |
453 | cifs_sb->mnt_file_mode, |
454 | cifs_sb->mnt_dir_mode); | |
8616e0fc JL |
455 | if (tcon->seal) |
456 | seq_printf(s, ",seal"); | |
457 | if (tcon->nocase) | |
458 | seq_printf(s, ",nocase"); | |
459 | if (tcon->retry) | |
460 | seq_printf(s, ",hard"); | |
461 | if (cifs_sb->prepath) | |
462 | seq_printf(s, ",prepath=%s", cifs_sb->prepath); | |
463 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) | |
464 | seq_printf(s, ",posixpaths"); | |
465 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) | |
466 | seq_printf(s, ",setuids"); | |
467 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) | |
468 | seq_printf(s, ",serverino"); | |
469 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) | |
470 | seq_printf(s, ",directio"); | |
471 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) | |
472 | seq_printf(s, ",nouser_xattr"); | |
473 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR) | |
474 | seq_printf(s, ",mapchars"); | |
475 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) | |
476 | seq_printf(s, ",sfu"); | |
477 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
478 | seq_printf(s, ",nobrl"); | |
479 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) | |
480 | seq_printf(s, ",cifsacl"); | |
481 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) | |
482 | seq_printf(s, ",dynperm"); | |
483 | if (m->mnt_sb->s_flags & MS_POSIXACL) | |
484 | seq_printf(s, ",acl"); | |
736a3320 SM |
485 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) |
486 | seq_printf(s, ",mfsymlinks"); | |
476428f8 SJ |
487 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE) |
488 | seq_printf(s, ",fsc"); | |
8616e0fc JL |
489 | |
490 | seq_printf(s, ",rsize=%d", cifs_sb->rsize); | |
491 | seq_printf(s, ",wsize=%d", cifs_sb->wsize); | |
6d20e840 SJ |
492 | /* convert actimeo and display it in seconds */ |
493 | seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ); | |
8616e0fc | 494 | |
1da177e4 LT |
495 | return 0; |
496 | } | |
497 | ||
42faad99 | 498 | static void cifs_umount_begin(struct super_block *sb) |
68058e75 | 499 | { |
42faad99 | 500 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
50c2f753 | 501 | struct cifsTconInfo *tcon; |
68058e75 | 502 | |
4523cc30 | 503 | if (cifs_sb == NULL) |
9e2e85f8 SF |
504 | return; |
505 | ||
0d424ad0 | 506 | tcon = cifs_sb_master_tcon(cifs_sb); |
f1987b44 | 507 | |
3f9bcca7 | 508 | spin_lock(&cifs_tcp_ses_lock); |
ad8034f1 SF |
509 | if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) { |
510 | /* we have other mounts to same share or we have | |
511 | already tried to force umount this and woken up | |
512 | all waiting network requests, nothing to do */ | |
3f9bcca7 | 513 | spin_unlock(&cifs_tcp_ses_lock); |
ad8034f1 SF |
514 | return; |
515 | } else if (tcon->tc_count == 1) | |
5e1253b5 | 516 | tcon->tidStatus = CifsExiting; |
3f9bcca7 | 517 | spin_unlock(&cifs_tcp_ses_lock); |
5e1253b5 | 518 | |
3a5ff61c | 519 | /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */ |
7b7abfe3 | 520 | /* cancel_notify_requests(tcon); */ |
50c2f753 | 521 | if (tcon->ses && tcon->ses->server) { |
b6b38f70 | 522 | cFYI(1, "wake up tasks now - umount begin not complete"); |
9e2e85f8 | 523 | wake_up_all(&tcon->ses->server->request_q); |
6ab16d24 SF |
524 | wake_up_all(&tcon->ses->server->response_q); |
525 | msleep(1); /* yield */ | |
526 | /* we have to kick the requests once more */ | |
527 | wake_up_all(&tcon->ses->server->response_q); | |
528 | msleep(1); | |
5e1253b5 | 529 | } |
68058e75 SF |
530 | |
531 | return; | |
532 | } | |
68058e75 | 533 | |
bf97d287 SF |
534 | #ifdef CONFIG_CIFS_STATS2 |
535 | static int cifs_show_stats(struct seq_file *s, struct vfsmount *mnt) | |
536 | { | |
537 | /* BB FIXME */ | |
538 | return 0; | |
539 | } | |
540 | #endif | |
541 | ||
1da177e4 LT |
542 | static int cifs_remount(struct super_block *sb, int *flags, char *data) |
543 | { | |
544 | *flags |= MS_NODIRATIME; | |
545 | return 0; | |
546 | } | |
547 | ||
45321ac5 | 548 | static int cifs_drop_inode(struct inode *inode) |
12420ac3 JL |
549 | { |
550 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
551 | ||
45321ac5 AV |
552 | /* no serverino => unconditional eviction */ |
553 | return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) || | |
554 | generic_drop_inode(inode); | |
12420ac3 JL |
555 | } |
556 | ||
ee9b6d61 | 557 | static const struct super_operations cifs_super_ops = { |
1da177e4 LT |
558 | .put_super = cifs_put_super, |
559 | .statfs = cifs_statfs, | |
560 | .alloc_inode = cifs_alloc_inode, | |
561 | .destroy_inode = cifs_destroy_inode, | |
12420ac3 | 562 | .drop_inode = cifs_drop_inode, |
b57922d9 | 563 | .evict_inode = cifs_evict_inode, |
12420ac3 JL |
564 | /* .delete_inode = cifs_delete_inode, */ /* Do not need above |
565 | function unless later we add lazy close of inodes or unless the | |
50c2f753 SF |
566 | kernel forgets to call us with the same number of releases (closes) |
567 | as opens */ | |
1da177e4 | 568 | .show_options = cifs_show_options, |
7b7abfe3 | 569 | .umount_begin = cifs_umount_begin, |
1da177e4 | 570 | .remount_fs = cifs_remount, |
bf97d287 | 571 | #ifdef CONFIG_CIFS_STATS2 |
f46d3e11 | 572 | .show_stats = cifs_show_stats, |
bf97d287 | 573 | #endif |
1da177e4 LT |
574 | }; |
575 | ||
d753ed97 AV |
576 | static struct dentry * |
577 | cifs_do_mount(struct file_system_type *fs_type, | |
578 | int flags, const char *dev_name, void *data) | |
1da177e4 LT |
579 | { |
580 | int rc; | |
db719222 JB |
581 | struct super_block *sb; |
582 | ||
db719222 | 583 | sb = sget(fs_type, NULL, set_anon_super, NULL); |
1da177e4 | 584 | |
b6b38f70 | 585 | cFYI(1, "Devname: %s flags: %d ", dev_name, flags); |
1da177e4 | 586 | |
b0991aa3 | 587 | if (IS_ERR(sb)) |
d753ed97 | 588 | return ERR_CAST(sb); |
1da177e4 LT |
589 | |
590 | sb->s_flags = flags; | |
591 | ||
9b04c997 | 592 | rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0); |
1da177e4 | 593 | if (rc) { |
6f5bbff9 | 594 | deactivate_locked_super(sb); |
d753ed97 | 595 | return ERR_PTR(rc); |
1da177e4 LT |
596 | } |
597 | sb->s_flags |= MS_ACTIVE; | |
d753ed97 | 598 | return dget(sb->s_root); |
1da177e4 LT |
599 | } |
600 | ||
027445c3 BP |
601 | static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov, |
602 | unsigned long nr_segs, loff_t pos) | |
1da177e4 | 603 | { |
e6a00296 | 604 | struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode; |
1da177e4 | 605 | ssize_t written; |
72432ffc | 606 | int rc; |
1da177e4 | 607 | |
027445c3 | 608 | written = generic_file_aio_write(iocb, iov, nr_segs, pos); |
72432ffc PS |
609 | |
610 | if (CIFS_I(inode)->clientCanCacheAll) | |
611 | return written; | |
612 | ||
613 | rc = filemap_fdatawrite(inode->i_mapping); | |
614 | if (rc) | |
615 | cFYI(1, "cifs_file_aio_write: %d rc on %p inode", rc, inode); | |
616 | ||
1da177e4 LT |
617 | return written; |
618 | } | |
619 | ||
c32a0b68 SF |
620 | static loff_t cifs_llseek(struct file *file, loff_t offset, int origin) |
621 | { | |
622 | /* origin == SEEK_END => we must revalidate the cached file length */ | |
0889a944 | 623 | if (origin == SEEK_END) { |
030e9d81 SF |
624 | int retval; |
625 | ||
626 | /* some applications poll for the file length in this strange | |
627 | way so we must seek to end on non-oplocked files by | |
628 | setting the revalidate time to zero */ | |
c33f8d32 | 629 | CIFS_I(file->f_path.dentry->d_inode)->time = 0; |
030e9d81 | 630 | |
abab095d | 631 | retval = cifs_revalidate_file(file); |
c32a0b68 SF |
632 | if (retval < 0) |
633 | return (loff_t)retval; | |
634 | } | |
9465efc9 | 635 | return generic_file_llseek_unlocked(file, offset, origin); |
c32a0b68 SF |
636 | } |
637 | ||
84210e91 SF |
638 | static int cifs_setlease(struct file *file, long arg, struct file_lock **lease) |
639 | { | |
b89f4321 AB |
640 | /* note that this is called by vfs setlease with lock_flocks held |
641 | to protect *lease from going away */ | |
84210e91 | 642 | struct inode *inode = file->f_path.dentry->d_inode; |
ba00ba64 | 643 | struct cifsFileInfo *cfile = file->private_data; |
84210e91 SF |
644 | |
645 | if (!(S_ISREG(inode->i_mode))) | |
646 | return -EINVAL; | |
647 | ||
648 | /* check if file is oplocked */ | |
649 | if (((arg == F_RDLCK) && | |
650 | (CIFS_I(inode)->clientCanCacheRead)) || | |
651 | ((arg == F_WRLCK) && | |
652 | (CIFS_I(inode)->clientCanCacheAll))) | |
653 | return generic_setlease(file, arg, lease); | |
13cfb733 JL |
654 | else if (tlink_tcon(cfile->tlink)->local_lease && |
655 | !CIFS_I(inode)->clientCanCacheRead) | |
84210e91 SF |
656 | /* If the server claims to support oplock on this |
657 | file, then we still need to check oplock even | |
658 | if the local_lease mount option is set, but there | |
659 | are servers which do not support oplock for which | |
660 | this mount option may be useful if the user | |
661 | knows that the file won't be changed on the server | |
662 | by anyone else */ | |
663 | return generic_setlease(file, arg, lease); | |
51ee4b84 | 664 | else |
84210e91 SF |
665 | return -EAGAIN; |
666 | } | |
84210e91 | 667 | |
e6ab1582 | 668 | struct file_system_type cifs_fs_type = { |
1da177e4 LT |
669 | .owner = THIS_MODULE, |
670 | .name = "cifs", | |
d753ed97 | 671 | .mount = cifs_do_mount, |
1da177e4 LT |
672 | .kill_sb = kill_anon_super, |
673 | /* .fs_flags */ | |
674 | }; | |
754661f1 | 675 | const struct inode_operations cifs_dir_inode_ops = { |
1da177e4 LT |
676 | .create = cifs_create, |
677 | .lookup = cifs_lookup, | |
678 | .getattr = cifs_getattr, | |
679 | .unlink = cifs_unlink, | |
680 | .link = cifs_hardlink, | |
681 | .mkdir = cifs_mkdir, | |
682 | .rmdir = cifs_rmdir, | |
683 | .rename = cifs_rename, | |
684 | .permission = cifs_permission, | |
685 | /* revalidate:cifs_revalidate, */ | |
686 | .setattr = cifs_setattr, | |
687 | .symlink = cifs_symlink, | |
688 | .mknod = cifs_mknod, | |
689 | #ifdef CONFIG_CIFS_XATTR | |
690 | .setxattr = cifs_setxattr, | |
691 | .getxattr = cifs_getxattr, | |
692 | .listxattr = cifs_listxattr, | |
693 | .removexattr = cifs_removexattr, | |
694 | #endif | |
695 | }; | |
696 | ||
754661f1 | 697 | const struct inode_operations cifs_file_inode_ops = { |
1da177e4 LT |
698 | /* revalidate:cifs_revalidate, */ |
699 | .setattr = cifs_setattr, | |
700 | .getattr = cifs_getattr, /* do we need this anymore? */ | |
701 | .rename = cifs_rename, | |
702 | .permission = cifs_permission, | |
703 | #ifdef CONFIG_CIFS_XATTR | |
704 | .setxattr = cifs_setxattr, | |
705 | .getxattr = cifs_getxattr, | |
706 | .listxattr = cifs_listxattr, | |
707 | .removexattr = cifs_removexattr, | |
50c2f753 | 708 | #endif |
1da177e4 LT |
709 | }; |
710 | ||
754661f1 | 711 | const struct inode_operations cifs_symlink_inode_ops = { |
50c2f753 | 712 | .readlink = generic_readlink, |
1da177e4 LT |
713 | .follow_link = cifs_follow_link, |
714 | .put_link = cifs_put_link, | |
715 | .permission = cifs_permission, | |
716 | /* BB add the following two eventually */ | |
717 | /* revalidate: cifs_revalidate, | |
718 | setattr: cifs_notify_change, *//* BB do we need notify change */ | |
719 | #ifdef CONFIG_CIFS_XATTR | |
720 | .setxattr = cifs_setxattr, | |
721 | .getxattr = cifs_getxattr, | |
722 | .listxattr = cifs_listxattr, | |
723 | .removexattr = cifs_removexattr, | |
50c2f753 | 724 | #endif |
1da177e4 LT |
725 | }; |
726 | ||
4b6f5d20 | 727 | const struct file_operations cifs_file_ops = { |
87c89dd7 SF |
728 | .read = do_sync_read, |
729 | .write = do_sync_write, | |
87c89dd7 SF |
730 | .aio_read = generic_file_aio_read, |
731 | .aio_write = cifs_file_aio_write, | |
1da177e4 LT |
732 | .open = cifs_open, |
733 | .release = cifs_close, | |
734 | .lock = cifs_lock, | |
735 | .fsync = cifs_fsync, | |
736 | .flush = cifs_flush, | |
737 | .mmap = cifs_file_mmap, | |
5ffc4ef4 | 738 | .splice_read = generic_file_splice_read, |
c32a0b68 | 739 | .llseek = cifs_llseek, |
c67593a0 | 740 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 741 | .unlocked_ioctl = cifs_ioctl, |
c67593a0 | 742 | #endif /* CONFIG_CIFS_POSIX */ |
84210e91 | 743 | .setlease = cifs_setlease, |
1da177e4 LT |
744 | }; |
745 | ||
8be7e6ba PS |
746 | const struct file_operations cifs_file_strict_ops = { |
747 | .read = do_sync_read, | |
748 | .write = do_sync_write, | |
a70307ee | 749 | .aio_read = cifs_strict_readv, |
72432ffc | 750 | .aio_write = cifs_strict_writev, |
8be7e6ba PS |
751 | .open = cifs_open, |
752 | .release = cifs_close, | |
753 | .lock = cifs_lock, | |
754 | .fsync = cifs_strict_fsync, | |
755 | .flush = cifs_flush, | |
7a6a19b1 | 756 | .mmap = cifs_file_strict_mmap, |
8be7e6ba PS |
757 | .splice_read = generic_file_splice_read, |
758 | .llseek = cifs_llseek, | |
759 | #ifdef CONFIG_CIFS_POSIX | |
760 | .unlocked_ioctl = cifs_ioctl, | |
761 | #endif /* CONFIG_CIFS_POSIX */ | |
762 | .setlease = cifs_setlease, | |
763 | }; | |
764 | ||
4b6f5d20 | 765 | const struct file_operations cifs_file_direct_ops = { |
a994b8fa | 766 | /* no aio, no readv - |
1da177e4 LT |
767 | BB reevaluate whether they can be done with directio, no cache */ |
768 | .read = cifs_user_read, | |
769 | .write = cifs_user_write, | |
770 | .open = cifs_open, | |
771 | .release = cifs_close, | |
772 | .lock = cifs_lock, | |
773 | .fsync = cifs_fsync, | |
774 | .flush = cifs_flush, | |
a994b8fa | 775 | .mmap = cifs_file_mmap, |
5ffc4ef4 | 776 | .splice_read = generic_file_splice_read, |
c67593a0 | 777 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 778 | .unlocked_ioctl = cifs_ioctl, |
c67593a0 | 779 | #endif /* CONFIG_CIFS_POSIX */ |
c32a0b68 | 780 | .llseek = cifs_llseek, |
84210e91 | 781 | .setlease = cifs_setlease, |
1da177e4 | 782 | }; |
8be7e6ba | 783 | |
4b6f5d20 | 784 | const struct file_operations cifs_file_nobrl_ops = { |
87c89dd7 SF |
785 | .read = do_sync_read, |
786 | .write = do_sync_write, | |
87c89dd7 SF |
787 | .aio_read = generic_file_aio_read, |
788 | .aio_write = cifs_file_aio_write, | |
789 | .open = cifs_open, | |
790 | .release = cifs_close, | |
791 | .fsync = cifs_fsync, | |
792 | .flush = cifs_flush, | |
793 | .mmap = cifs_file_mmap, | |
5ffc4ef4 | 794 | .splice_read = generic_file_splice_read, |
c32a0b68 | 795 | .llseek = cifs_llseek, |
8b94bcb9 | 796 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 797 | .unlocked_ioctl = cifs_ioctl, |
8b94bcb9 | 798 | #endif /* CONFIG_CIFS_POSIX */ |
84210e91 | 799 | .setlease = cifs_setlease, |
8b94bcb9 SF |
800 | }; |
801 | ||
8be7e6ba PS |
802 | const struct file_operations cifs_file_strict_nobrl_ops = { |
803 | .read = do_sync_read, | |
804 | .write = do_sync_write, | |
a70307ee | 805 | .aio_read = cifs_strict_readv, |
72432ffc | 806 | .aio_write = cifs_strict_writev, |
8be7e6ba PS |
807 | .open = cifs_open, |
808 | .release = cifs_close, | |
809 | .fsync = cifs_strict_fsync, | |
810 | .flush = cifs_flush, | |
7a6a19b1 | 811 | .mmap = cifs_file_strict_mmap, |
8be7e6ba PS |
812 | .splice_read = generic_file_splice_read, |
813 | .llseek = cifs_llseek, | |
814 | #ifdef CONFIG_CIFS_POSIX | |
815 | .unlocked_ioctl = cifs_ioctl, | |
816 | #endif /* CONFIG_CIFS_POSIX */ | |
817 | .setlease = cifs_setlease, | |
818 | }; | |
819 | ||
4b6f5d20 | 820 | const struct file_operations cifs_file_direct_nobrl_ops = { |
50c2f753 | 821 | /* no mmap, no aio, no readv - |
87c89dd7 SF |
822 | BB reevaluate whether they can be done with directio, no cache */ |
823 | .read = cifs_user_read, | |
824 | .write = cifs_user_write, | |
825 | .open = cifs_open, | |
826 | .release = cifs_close, | |
827 | .fsync = cifs_fsync, | |
828 | .flush = cifs_flush, | |
810627a0 | 829 | .mmap = cifs_file_mmap, |
5ffc4ef4 | 830 | .splice_read = generic_file_splice_read, |
8b94bcb9 | 831 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 832 | .unlocked_ioctl = cifs_ioctl, |
8b94bcb9 | 833 | #endif /* CONFIG_CIFS_POSIX */ |
c32a0b68 | 834 | .llseek = cifs_llseek, |
84210e91 | 835 | .setlease = cifs_setlease, |
8b94bcb9 | 836 | }; |
1da177e4 | 837 | |
4b6f5d20 | 838 | const struct file_operations cifs_dir_ops = { |
1da177e4 LT |
839 | .readdir = cifs_readdir, |
840 | .release = cifs_closedir, | |
841 | .read = generic_read_dir, | |
f9ddcca4 | 842 | .unlocked_ioctl = cifs_ioctl, |
3222a3e5 | 843 | .llseek = generic_file_llseek, |
1da177e4 LT |
844 | }; |
845 | ||
846 | static void | |
51cc5068 | 847 | cifs_init_once(void *inode) |
1da177e4 LT |
848 | { |
849 | struct cifsInodeInfo *cifsi = inode; | |
850 | ||
a35afb83 CL |
851 | inode_init_once(&cifsi->vfs_inode); |
852 | INIT_LIST_HEAD(&cifsi->lockList); | |
1da177e4 LT |
853 | } |
854 | ||
855 | static int | |
856 | cifs_init_inodecache(void) | |
857 | { | |
858 | cifs_inode_cachep = kmem_cache_create("cifs_inode_cache", | |
26f57364 | 859 | sizeof(struct cifsInodeInfo), |
fffb60f9 PJ |
860 | 0, (SLAB_RECLAIM_ACCOUNT| |
861 | SLAB_MEM_SPREAD), | |
20c2df83 | 862 | cifs_init_once); |
1da177e4 LT |
863 | if (cifs_inode_cachep == NULL) |
864 | return -ENOMEM; | |
865 | ||
866 | return 0; | |
867 | } | |
868 | ||
869 | static void | |
870 | cifs_destroy_inodecache(void) | |
871 | { | |
1a1d92c1 | 872 | kmem_cache_destroy(cifs_inode_cachep); |
1da177e4 LT |
873 | } |
874 | ||
875 | static int | |
876 | cifs_init_request_bufs(void) | |
877 | { | |
4523cc30 | 878 | if (CIFSMaxBufSize < 8192) { |
1da177e4 LT |
879 | /* Buffer size can not be smaller than 2 * PATH_MAX since maximum |
880 | Unicode path name has to fit in any SMB/CIFS path based frames */ | |
881 | CIFSMaxBufSize = 8192; | |
882 | } else if (CIFSMaxBufSize > 1024*127) { | |
883 | CIFSMaxBufSize = 1024 * 127; | |
884 | } else { | |
885 | CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/ | |
886 | } | |
b6b38f70 | 887 | /* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */ |
1da177e4 LT |
888 | cifs_req_cachep = kmem_cache_create("cifs_request", |
889 | CIFSMaxBufSize + | |
890 | MAX_CIFS_HDR_SIZE, 0, | |
20c2df83 | 891 | SLAB_HWCACHE_ALIGN, NULL); |
1da177e4 LT |
892 | if (cifs_req_cachep == NULL) |
893 | return -ENOMEM; | |
894 | ||
4523cc30 | 895 | if (cifs_min_rcv < 1) |
1da177e4 LT |
896 | cifs_min_rcv = 1; |
897 | else if (cifs_min_rcv > 64) { | |
898 | cifs_min_rcv = 64; | |
b6b38f70 | 899 | cERROR(1, "cifs_min_rcv set to maximum (64)"); |
1da177e4 LT |
900 | } |
901 | ||
93d2341c MD |
902 | cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv, |
903 | cifs_req_cachep); | |
1da177e4 | 904 | |
4523cc30 | 905 | if (cifs_req_poolp == NULL) { |
1da177e4 LT |
906 | kmem_cache_destroy(cifs_req_cachep); |
907 | return -ENOMEM; | |
908 | } | |
ec637e3f | 909 | /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and |
1da177e4 LT |
910 | almost all handle based requests (but not write response, nor is it |
911 | sufficient for path based requests). A smaller size would have | |
50c2f753 | 912 | been more efficient (compacting multiple slab items on one 4k page) |
1da177e4 LT |
913 | for the case in which debug was on, but this larger size allows |
914 | more SMBs to use small buffer alloc and is still much more | |
6dc0f87e | 915 | efficient to alloc 1 per page off the slab compared to 17K (5page) |
1da177e4 LT |
916 | alloc of large cifs buffers even when page debugging is on */ |
917 | cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq", | |
6dc0f87e | 918 | MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN, |
20c2df83 | 919 | NULL); |
1da177e4 LT |
920 | if (cifs_sm_req_cachep == NULL) { |
921 | mempool_destroy(cifs_req_poolp); | |
922 | kmem_cache_destroy(cifs_req_cachep); | |
6dc0f87e | 923 | return -ENOMEM; |
1da177e4 LT |
924 | } |
925 | ||
4523cc30 | 926 | if (cifs_min_small < 2) |
1da177e4 LT |
927 | cifs_min_small = 2; |
928 | else if (cifs_min_small > 256) { | |
929 | cifs_min_small = 256; | |
b6b38f70 | 930 | cFYI(1, "cifs_min_small set to maximum (256)"); |
1da177e4 LT |
931 | } |
932 | ||
93d2341c MD |
933 | cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small, |
934 | cifs_sm_req_cachep); | |
1da177e4 | 935 | |
4523cc30 | 936 | if (cifs_sm_req_poolp == NULL) { |
1da177e4 LT |
937 | mempool_destroy(cifs_req_poolp); |
938 | kmem_cache_destroy(cifs_req_cachep); | |
939 | kmem_cache_destroy(cifs_sm_req_cachep); | |
940 | return -ENOMEM; | |
941 | } | |
942 | ||
943 | return 0; | |
944 | } | |
945 | ||
946 | static void | |
947 | cifs_destroy_request_bufs(void) | |
948 | { | |
949 | mempool_destroy(cifs_req_poolp); | |
1a1d92c1 | 950 | kmem_cache_destroy(cifs_req_cachep); |
1da177e4 | 951 | mempool_destroy(cifs_sm_req_poolp); |
1a1d92c1 | 952 | kmem_cache_destroy(cifs_sm_req_cachep); |
1da177e4 LT |
953 | } |
954 | ||
955 | static int | |
956 | cifs_init_mids(void) | |
957 | { | |
958 | cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids", | |
26f57364 SF |
959 | sizeof(struct mid_q_entry), 0, |
960 | SLAB_HWCACHE_ALIGN, NULL); | |
1da177e4 LT |
961 | if (cifs_mid_cachep == NULL) |
962 | return -ENOMEM; | |
963 | ||
93d2341c MD |
964 | /* 3 is a reasonable minimum number of simultaneous operations */ |
965 | cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep); | |
4523cc30 | 966 | if (cifs_mid_poolp == NULL) { |
1da177e4 LT |
967 | kmem_cache_destroy(cifs_mid_cachep); |
968 | return -ENOMEM; | |
969 | } | |
970 | ||
1da177e4 LT |
971 | return 0; |
972 | } | |
973 | ||
974 | static void | |
975 | cifs_destroy_mids(void) | |
976 | { | |
977 | mempool_destroy(cifs_mid_poolp); | |
1a1d92c1 | 978 | kmem_cache_destroy(cifs_mid_cachep); |
1da177e4 LT |
979 | } |
980 | ||
1da177e4 LT |
981 | static int __init |
982 | init_cifs(void) | |
983 | { | |
984 | int rc = 0; | |
1da177e4 | 985 | cifs_proc_init(); |
e7ddee90 | 986 | INIT_LIST_HEAD(&cifs_tcp_ses_list); |
4ca9c190 SF |
987 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
988 | INIT_LIST_HEAD(&GlobalDnotifyReqList); | |
989 | INIT_LIST_HEAD(&GlobalDnotifyRsp_Q); | |
6dc0f87e | 990 | #endif |
1da177e4 LT |
991 | /* |
992 | * Initialize Global counters | |
993 | */ | |
994 | atomic_set(&sesInfoAllocCount, 0); | |
995 | atomic_set(&tconInfoAllocCount, 0); | |
6dc0f87e | 996 | atomic_set(&tcpSesAllocCount, 0); |
1da177e4 LT |
997 | atomic_set(&tcpSesReconnectCount, 0); |
998 | atomic_set(&tconInfoReconnectCount, 0); | |
999 | ||
1000 | atomic_set(&bufAllocCount, 0); | |
4498eed5 SF |
1001 | atomic_set(&smBufAllocCount, 0); |
1002 | #ifdef CONFIG_CIFS_STATS2 | |
1003 | atomic_set(&totBufAllocCount, 0); | |
1004 | atomic_set(&totSmBufAllocCount, 0); | |
1005 | #endif /* CONFIG_CIFS_STATS2 */ | |
1006 | ||
1da177e4 LT |
1007 | atomic_set(&midCount, 0); |
1008 | GlobalCurrentXid = 0; | |
1009 | GlobalTotalActiveXid = 0; | |
1010 | GlobalMaxActiveXid = 0; | |
3f9bcca7 | 1011 | spin_lock_init(&cifs_tcp_ses_lock); |
4477288a | 1012 | spin_lock_init(&cifs_file_list_lock); |
1da177e4 LT |
1013 | spin_lock_init(&GlobalMid_Lock); |
1014 | ||
4523cc30 | 1015 | if (cifs_max_pending < 2) { |
1da177e4 | 1016 | cifs_max_pending = 2; |
b6b38f70 | 1017 | cFYI(1, "cifs_max_pending set to min of 2"); |
4523cc30 | 1018 | } else if (cifs_max_pending > 256) { |
1da177e4 | 1019 | cifs_max_pending = 256; |
b6b38f70 | 1020 | cFYI(1, "cifs_max_pending set to max of 256"); |
1da177e4 LT |
1021 | } |
1022 | ||
f579cf3c SJ |
1023 | rc = cifs_fscache_register(); |
1024 | if (rc) | |
d3bf5221 | 1025 | goto out_clean_proc; |
f579cf3c | 1026 | |
1da177e4 | 1027 | rc = cifs_init_inodecache(); |
45af7a0f | 1028 | if (rc) |
d3bf5221 | 1029 | goto out_unreg_fscache; |
45af7a0f SF |
1030 | |
1031 | rc = cifs_init_mids(); | |
1032 | if (rc) | |
1033 | goto out_destroy_inodecache; | |
1034 | ||
1035 | rc = cifs_init_request_bufs(); | |
1036 | if (rc) | |
1037 | goto out_destroy_mids; | |
1038 | ||
1039 | rc = register_filesystem(&cifs_fs_type); | |
1040 | if (rc) | |
1041 | goto out_destroy_request_bufs; | |
84a15b93 JL |
1042 | #ifdef CONFIG_CIFS_UPCALL |
1043 | rc = register_key_type(&cifs_spnego_key_type); | |
1044 | if (rc) | |
1045 | goto out_unregister_filesystem; | |
6103335d | 1046 | #endif |
45af7a0f | 1047 | |
45af7a0f SF |
1048 | return 0; |
1049 | ||
84a15b93 | 1050 | #ifdef CONFIG_CIFS_UPCALL |
d3bf5221 | 1051 | out_unregister_filesystem: |
45af7a0f | 1052 | unregister_filesystem(&cifs_fs_type); |
1fc7995d | 1053 | #endif |
d3bf5221 | 1054 | out_destroy_request_bufs: |
45af7a0f | 1055 | cifs_destroy_request_bufs(); |
d3bf5221 | 1056 | out_destroy_mids: |
45af7a0f | 1057 | cifs_destroy_mids(); |
d3bf5221 | 1058 | out_destroy_inodecache: |
45af7a0f | 1059 | cifs_destroy_inodecache(); |
d3bf5221 | 1060 | out_unreg_fscache: |
f579cf3c | 1061 | cifs_fscache_unregister(); |
d3bf5221 SF |
1062 | out_clean_proc: |
1063 | cifs_proc_clean(); | |
1da177e4 LT |
1064 | return rc; |
1065 | } | |
1066 | ||
1067 | static void __exit | |
1068 | exit_cifs(void) | |
1069 | { | |
b6b38f70 | 1070 | cFYI(DBG2, "exit_cifs"); |
1da177e4 | 1071 | cifs_proc_clean(); |
f579cf3c | 1072 | cifs_fscache_unregister(); |
6103335d | 1073 | #ifdef CONFIG_CIFS_DFS_UPCALL |
78d31a3a | 1074 | cifs_dfs_release_automount_timer(); |
6103335d | 1075 | #endif |
84a15b93 JL |
1076 | #ifdef CONFIG_CIFS_UPCALL |
1077 | unregister_key_type(&cifs_spnego_key_type); | |
1da177e4 LT |
1078 | #endif |
1079 | unregister_filesystem(&cifs_fs_type); | |
1080 | cifs_destroy_inodecache(); | |
1081 | cifs_destroy_mids(); | |
1082 | cifs_destroy_request_bufs(); | |
1da177e4 LT |
1083 | } |
1084 | ||
1085 | MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>"); | |
6dc0f87e | 1086 | MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */ |
1da177e4 | 1087 | MODULE_DESCRIPTION |
63135e08 SF |
1088 | ("VFS to access servers complying with the SNIA CIFS Specification " |
1089 | "e.g. Samba and Windows"); | |
1da177e4 LT |
1090 | MODULE_VERSION(CIFS_VERSION); |
1091 | module_init(init_cifs) | |
1092 | module_exit(exit_cifs) |