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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> |
fec11dd9 | 38 | #include <linux/namei.h> |
3eb9a889 | 39 | #include <net/ipv6.h> |
1da177e4 LT |
40 | #include "cifsfs.h" |
41 | #include "cifspdu.h" | |
42 | #define DECLARE_GLOBALS_HERE | |
43 | #include "cifsglob.h" | |
44 | #include "cifsproto.h" | |
45 | #include "cifs_debug.h" | |
46 | #include "cifs_fs_sb.h" | |
47 | #include <linux/mm.h> | |
84a15b93 | 48 | #include <linux/key-type.h> |
e545937a | 49 | #include "cifs_spnego.h" |
f579cf3c | 50 | #include "fscache.h" |
1da177e4 LT |
51 | #define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */ |
52 | ||
1da177e4 LT |
53 | int cifsFYI = 0; |
54 | int cifsERROR = 1; | |
55 | int traceSMB = 0; | |
56 | unsigned int oplockEnabled = 1; | |
1da177e4 LT |
57 | unsigned int linuxExtEnabled = 1; |
58 | unsigned int lookupCacheEnabled = 1; | |
59 | unsigned int multiuser_mount = 0; | |
04912d6a | 60 | unsigned int global_secflags = CIFSSEC_DEF; |
3979877e | 61 | /* unsigned int ntlmv2_support = 0; */ |
1da177e4 | 62 | unsigned int sign_CIFS_PDUs = 1; |
ee9b6d61 | 63 | static const struct super_operations cifs_super_ops; |
1da177e4 LT |
64 | unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE; |
65 | module_param(CIFSMaxBufSize, int, 0); | |
63135e08 SF |
66 | MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). " |
67 | "Default: 16384 Range: 8192 to 130048"); | |
1da177e4 LT |
68 | unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL; |
69 | module_param(cifs_min_rcv, int, 0); | |
63135e08 SF |
70 | MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: " |
71 | "1 to 64"); | |
1da177e4 LT |
72 | unsigned int cifs_min_small = 30; |
73 | module_param(cifs_min_small, int, 0); | |
63135e08 SF |
74 | MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 " |
75 | "Range: 2 to 256"); | |
1da177e4 LT |
76 | unsigned int cifs_max_pending = CIFS_MAX_REQ; |
77 | module_param(cifs_max_pending, int, 0); | |
63135e08 SF |
78 | MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. " |
79 | "Default: 50 Range: 2 to 256"); | |
fda35943 SF |
80 | unsigned short echo_retries = 5; |
81 | module_param(echo_retries, ushort, 0644); | |
82 | MODULE_PARM_DESC(echo_retries, "Number of echo attempts before giving up and " | |
83 | "reconnecting server. Default: 5. 0 means " | |
84 | "never reconnect."); | |
1da177e4 LT |
85 | extern mempool_t *cifs_sm_req_poolp; |
86 | extern mempool_t *cifs_req_poolp; | |
87 | extern mempool_t *cifs_mid_poolp; | |
88 | ||
d7c86ff8 JL |
89 | void |
90 | cifs_sb_active(struct super_block *sb) | |
91 | { | |
92 | struct cifs_sb_info *server = CIFS_SB(sb); | |
93 | ||
94 | if (atomic_inc_return(&server->active) == 1) | |
95 | atomic_inc(&sb->s_active); | |
96 | } | |
97 | ||
98 | void | |
99 | cifs_sb_deactive(struct super_block *sb) | |
100 | { | |
101 | struct cifs_sb_info *server = CIFS_SB(sb); | |
102 | ||
103 | if (atomic_dec_and_test(&server->active)) | |
104 | deactivate_super(sb); | |
105 | } | |
106 | ||
1da177e4 | 107 | static int |
97d1152a | 108 | cifs_read_super(struct super_block *sb) |
1da177e4 LT |
109 | { |
110 | struct inode *inode; | |
b2e5cd33 | 111 | struct cifs_sb_info *cifs_sb; |
1da177e4 | 112 | int rc = 0; |
50c2f753 | 113 | |
b2e5cd33 | 114 | cifs_sb = CIFS_SB(sb); |
1da177e4 | 115 | |
2c6292ae AV |
116 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIXACL) |
117 | sb->s_flags |= MS_POSIXACL; | |
118 | ||
119 | if (cifs_sb_master_tcon(cifs_sb)->ses->capabilities & CAP_LARGE_FILES) | |
120 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
121 | else | |
122 | sb->s_maxbytes = MAX_NON_LFS; | |
123 | ||
124 | /* BB FIXME fix time_gran to be larger for LANMAN sessions */ | |
125 | sb->s_time_gran = 100; | |
126 | ||
1da177e4 LT |
127 | sb->s_magic = CIFS_MAGIC_NUMBER; |
128 | sb->s_op = &cifs_super_ops; | |
8044f7f4 | 129 | sb->s_bdi = &cifs_sb->bdi; |
1da177e4 LT |
130 | sb->s_blocksize = CIFS_MAX_MSGSIZE; |
131 | sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */ | |
9b6763e0 | 132 | inode = cifs_root_iget(sb); |
1da177e4 | 133 | |
ce634ab2 DH |
134 | if (IS_ERR(inode)) { |
135 | rc = PTR_ERR(inode); | |
136 | inode = NULL; | |
1da177e4 LT |
137 | goto out_no_root; |
138 | } | |
139 | ||
140 | sb->s_root = d_alloc_root(inode); | |
141 | ||
142 | if (!sb->s_root) { | |
143 | rc = -ENOMEM; | |
144 | goto out_no_root; | |
145 | } | |
50c2f753 | 146 | |
1c929cfe AV |
147 | /* do that *after* d_alloc_root() - we want NULL ->d_op for root here */ |
148 | if (cifs_sb_master_tcon(cifs_sb)->nocase) | |
149 | sb->s_d_op = &cifs_ci_dentry_ops; | |
150 | else | |
151 | sb->s_d_op = &cifs_dentry_ops; | |
152 | ||
25720873 | 153 | #ifdef CIFS_NFSD_EXPORT |
7521a3c5 | 154 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
b6b38f70 | 155 | cFYI(1, "export ops supported"); |
7521a3c5 SF |
156 | sb->s_export_op = &cifs_export_ops; |
157 | } | |
25720873 | 158 | #endif /* CIFS_NFSD_EXPORT */ |
1da177e4 LT |
159 | |
160 | return 0; | |
161 | ||
162 | out_no_root: | |
b6b38f70 | 163 | cERROR(1, "cifs_read_super: get root inode failed"); |
1da177e4 LT |
164 | if (inode) |
165 | iput(inode); | |
54b4602d | 166 | |
1da177e4 LT |
167 | return rc; |
168 | } | |
169 | ||
6d686175 AV |
170 | static void cifs_kill_sb(struct super_block *sb) |
171 | { | |
172 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
173 | kill_anon_super(sb); | |
98ab494d | 174 | cifs_umount(cifs_sb); |
1da177e4 LT |
175 | } |
176 | ||
177 | static int | |
726c3342 | 178 | cifs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 179 | { |
726c3342 | 180 | struct super_block *sb = dentry->d_sb; |
39da9847 | 181 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
96daf2b0 | 182 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
c81156dd | 183 | int rc = -EOPNOTSUPP; |
39da9847 | 184 | int xid; |
1da177e4 LT |
185 | |
186 | xid = GetXid(); | |
187 | ||
1da177e4 LT |
188 | buf->f_type = CIFS_MAGIC_NUMBER; |
189 | ||
39da9847 SF |
190 | /* |
191 | * PATH_MAX may be too long - it would presumably be total path, | |
192 | * but note that some servers (includinng Samba 3) have a shorter | |
193 | * maximum path. | |
194 | * | |
195 | * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO. | |
196 | */ | |
197 | buf->f_namelen = PATH_MAX; | |
1da177e4 LT |
198 | buf->f_files = 0; /* undefined */ |
199 | buf->f_ffree = 0; /* unlimited */ | |
200 | ||
39da9847 SF |
201 | /* |
202 | * We could add a second check for a QFS Unix capability bit | |
203 | */ | |
204 | if ((tcon->ses->capabilities & CAP_UNIX) && | |
205 | (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability))) | |
206 | rc = CIFSSMBQFSPosixInfo(xid, tcon, buf); | |
207 | ||
208 | /* | |
209 | * Only need to call the old QFSInfo if failed on newer one, | |
210 | * e.g. by OS/2. | |
211 | **/ | |
212 | if (rc && (tcon->ses->capabilities & CAP_NT_SMBS)) | |
213 | rc = CIFSSMBQFSInfo(xid, tcon, buf); | |
214 | ||
215 | /* | |
216 | * Some old Windows servers also do not support level 103, retry with | |
217 | * older level one if old server failed the previous call or we | |
218 | * bypassed it because we detected that this was an older LANMAN sess | |
219 | */ | |
4523cc30 | 220 | if (rc) |
39da9847 SF |
221 | rc = SMBOldQFSInfo(xid, tcon, buf); |
222 | ||
1da177e4 | 223 | FreeXid(xid); |
39da9847 | 224 | return 0; |
1da177e4 LT |
225 | } |
226 | ||
b74c79e9 | 227 | static int cifs_permission(struct inode *inode, int mask, unsigned int flags) |
1da177e4 LT |
228 | { |
229 | struct cifs_sb_info *cifs_sb; | |
230 | ||
231 | cifs_sb = CIFS_SB(inode->i_sb); | |
232 | ||
f696a365 MS |
233 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) { |
234 | if ((mask & MAY_EXEC) && !execute_ok(inode)) | |
235 | return -EACCES; | |
236 | else | |
237 | return 0; | |
238 | } else /* file mode might have been restricted at mount time | |
50c2f753 | 239 | on the client (above and beyond ACL on servers) for |
1da177e4 | 240 | servers which do not support setting and viewing mode bits, |
50c2f753 | 241 | so allowing client to check permissions is useful */ |
b74c79e9 | 242 | return generic_permission(inode, mask, flags, NULL); |
1da177e4 LT |
243 | } |
244 | ||
e18b890b CL |
245 | static struct kmem_cache *cifs_inode_cachep; |
246 | static struct kmem_cache *cifs_req_cachep; | |
247 | static struct kmem_cache *cifs_mid_cachep; | |
e18b890b | 248 | static struct kmem_cache *cifs_sm_req_cachep; |
1da177e4 LT |
249 | mempool_t *cifs_sm_req_poolp; |
250 | mempool_t *cifs_req_poolp; | |
251 | mempool_t *cifs_mid_poolp; | |
252 | ||
253 | static struct inode * | |
254 | cifs_alloc_inode(struct super_block *sb) | |
255 | { | |
256 | struct cifsInodeInfo *cifs_inode; | |
e94b1766 | 257 | cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
258 | if (!cifs_inode) |
259 | return NULL; | |
260 | cifs_inode->cifsAttrs = 0x20; /* default */ | |
1da177e4 LT |
261 | cifs_inode->time = 0; |
262 | /* Until the file is open and we have gotten oplock | |
263 | info back from the server, can not assume caching of | |
264 | file data or metadata */ | |
c6723628 | 265 | cifs_set_oplock_level(cifs_inode, 0); |
9a8165fc | 266 | cifs_inode->delete_pending = false; |
df2cf170 | 267 | cifs_inode->invalid_mapping = false; |
1da177e4 | 268 | cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */ |
fbec9ab9 | 269 | cifs_inode->server_eof = 0; |
20054bd6 JL |
270 | cifs_inode->uniqueid = 0; |
271 | cifs_inode->createtime = 0; | |
50c2f753 | 272 | |
1b2b2126 SF |
273 | /* Can not set i_flags here - they get immediately overwritten |
274 | to zero by the VFS */ | |
275 | /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/ | |
1da177e4 LT |
276 | INIT_LIST_HEAD(&cifs_inode->openFileList); |
277 | return &cifs_inode->vfs_inode; | |
278 | } | |
279 | ||
fa0d7e3d NP |
280 | static void cifs_i_callback(struct rcu_head *head) |
281 | { | |
282 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
283 | INIT_LIST_HEAD(&inode->i_dentry); | |
284 | kmem_cache_free(cifs_inode_cachep, CIFS_I(inode)); | |
285 | } | |
286 | ||
1da177e4 LT |
287 | static void |
288 | cifs_destroy_inode(struct inode *inode) | |
289 | { | |
fa0d7e3d | 290 | call_rcu(&inode->i_rcu, cifs_i_callback); |
1da177e4 LT |
291 | } |
292 | ||
9451a9a5 | 293 | static void |
b57922d9 | 294 | cifs_evict_inode(struct inode *inode) |
9451a9a5 | 295 | { |
b57922d9 AV |
296 | truncate_inode_pages(&inode->i_data, 0); |
297 | end_writeback(inode); | |
9451a9a5 SJ |
298 | cifs_fscache_release_inode_cookie(inode); |
299 | } | |
300 | ||
61f98ffd JL |
301 | static void |
302 | cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server) | |
303 | { | |
a9f1b85e PS |
304 | struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr; |
305 | struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr; | |
306 | ||
61f98ffd JL |
307 | seq_printf(s, ",addr="); |
308 | ||
a9f1b85e | 309 | switch (server->dstaddr.ss_family) { |
61f98ffd | 310 | case AF_INET: |
a9f1b85e | 311 | seq_printf(s, "%pI4", &sa->sin_addr.s_addr); |
61f98ffd JL |
312 | break; |
313 | case AF_INET6: | |
a9f1b85e PS |
314 | seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr); |
315 | if (sa6->sin6_scope_id) | |
316 | seq_printf(s, "%%%u", sa6->sin6_scope_id); | |
61f98ffd JL |
317 | break; |
318 | default: | |
319 | seq_printf(s, "(unknown)"); | |
320 | } | |
321 | } | |
322 | ||
3e715513 JL |
323 | static void |
324 | cifs_show_security(struct seq_file *s, struct TCP_Server_Info *server) | |
325 | { | |
326 | seq_printf(s, ",sec="); | |
327 | ||
328 | switch (server->secType) { | |
329 | case LANMAN: | |
330 | seq_printf(s, "lanman"); | |
331 | break; | |
332 | case NTLMv2: | |
333 | seq_printf(s, "ntlmv2"); | |
334 | break; | |
335 | case NTLM: | |
336 | seq_printf(s, "ntlm"); | |
337 | break; | |
338 | case Kerberos: | |
339 | seq_printf(s, "krb5"); | |
340 | break; | |
341 | case RawNTLMSSP: | |
342 | seq_printf(s, "ntlmssp"); | |
343 | break; | |
344 | default: | |
345 | /* shouldn't ever happen */ | |
346 | seq_printf(s, "unknown"); | |
347 | break; | |
348 | } | |
349 | ||
350 | if (server->sec_mode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) | |
351 | seq_printf(s, "i"); | |
352 | } | |
353 | ||
1da177e4 LT |
354 | /* |
355 | * cifs_show_options() is for displaying mount options in /proc/mounts. | |
356 | * Not all settable options are displayed but most of the important | |
357 | * ones are. | |
358 | */ | |
359 | static int | |
360 | cifs_show_options(struct seq_file *s, struct vfsmount *m) | |
361 | { | |
8e047d09 | 362 | struct cifs_sb_info *cifs_sb = CIFS_SB(m->mnt_sb); |
96daf2b0 | 363 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
3eb9a889 BG |
364 | struct sockaddr *srcaddr; |
365 | srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr; | |
8616e0fc | 366 | |
3e715513 JL |
367 | cifs_show_security(s, tcon->ses->server); |
368 | ||
8e047d09 | 369 | seq_printf(s, ",unc=%s", tcon->treeName); |
29e07c82 JL |
370 | |
371 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) | |
372 | seq_printf(s, ",multiuser"); | |
8727c8a8 SF |
373 | else if (tcon->ses->user_name) |
374 | seq_printf(s, ",username=%s", tcon->ses->user_name); | |
29e07c82 | 375 | |
8616e0fc JL |
376 | if (tcon->ses->domainName) |
377 | seq_printf(s, ",domain=%s", tcon->ses->domainName); | |
378 | ||
3eb9a889 BG |
379 | if (srcaddr->sa_family != AF_UNSPEC) { |
380 | struct sockaddr_in *saddr4; | |
381 | struct sockaddr_in6 *saddr6; | |
382 | saddr4 = (struct sockaddr_in *)srcaddr; | |
383 | saddr6 = (struct sockaddr_in6 *)srcaddr; | |
384 | if (srcaddr->sa_family == AF_INET6) | |
385 | seq_printf(s, ",srcaddr=%pI6c", | |
386 | &saddr6->sin6_addr); | |
387 | else if (srcaddr->sa_family == AF_INET) | |
388 | seq_printf(s, ",srcaddr=%pI4", | |
389 | &saddr4->sin_addr.s_addr); | |
390 | else | |
391 | seq_printf(s, ",srcaddr=BAD-AF:%i", | |
392 | (int)(srcaddr->sa_family)); | |
393 | } | |
394 | ||
8616e0fc | 395 | seq_printf(s, ",uid=%d", cifs_sb->mnt_uid); |
340481a3 JL |
396 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) |
397 | seq_printf(s, ",forceuid"); | |
4486d6ed JL |
398 | else |
399 | seq_printf(s, ",noforceuid"); | |
340481a3 | 400 | |
8616e0fc | 401 | seq_printf(s, ",gid=%d", cifs_sb->mnt_gid); |
340481a3 JL |
402 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) |
403 | seq_printf(s, ",forcegid"); | |
4486d6ed JL |
404 | else |
405 | seq_printf(s, ",noforcegid"); | |
8616e0fc | 406 | |
61f98ffd | 407 | cifs_show_address(s, tcon->ses->server); |
1da177e4 | 408 | |
8616e0fc JL |
409 | if (!tcon->unix_ext) |
410 | seq_printf(s, ",file_mode=0%o,dir_mode=0%o", | |
2b280fab SF |
411 | cifs_sb->mnt_file_mode, |
412 | cifs_sb->mnt_dir_mode); | |
8616e0fc JL |
413 | if (tcon->seal) |
414 | seq_printf(s, ",seal"); | |
415 | if (tcon->nocase) | |
416 | seq_printf(s, ",nocase"); | |
417 | if (tcon->retry) | |
418 | seq_printf(s, ",hard"); | |
d4ffff1f PS |
419 | if (tcon->unix_ext) |
420 | seq_printf(s, ",unix"); | |
421 | else | |
422 | seq_printf(s, ",nounix"); | |
8616e0fc JL |
423 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) |
424 | seq_printf(s, ",posixpaths"); | |
425 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) | |
426 | seq_printf(s, ",setuids"); | |
427 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) | |
428 | seq_printf(s, ",serverino"); | |
d4ffff1f PS |
429 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD) |
430 | seq_printf(s, ",rwpidforward"); | |
431 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) | |
432 | seq_printf(s, ",forcemand"); | |
8616e0fc JL |
433 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) |
434 | seq_printf(s, ",directio"); | |
435 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) | |
436 | seq_printf(s, ",nouser_xattr"); | |
437 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR) | |
438 | seq_printf(s, ",mapchars"); | |
439 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) | |
440 | seq_printf(s, ",sfu"); | |
441 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
442 | seq_printf(s, ",nobrl"); | |
443 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) | |
444 | seq_printf(s, ",cifsacl"); | |
445 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) | |
446 | seq_printf(s, ",dynperm"); | |
447 | if (m->mnt_sb->s_flags & MS_POSIXACL) | |
448 | seq_printf(s, ",acl"); | |
736a3320 SM |
449 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) |
450 | seq_printf(s, ",mfsymlinks"); | |
476428f8 SJ |
451 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE) |
452 | seq_printf(s, ",fsc"); | |
8616e0fc JL |
453 | |
454 | seq_printf(s, ",rsize=%d", cifs_sb->rsize); | |
455 | seq_printf(s, ",wsize=%d", cifs_sb->wsize); | |
6d20e840 SJ |
456 | /* convert actimeo and display it in seconds */ |
457 | seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ); | |
8616e0fc | 458 | |
1da177e4 LT |
459 | return 0; |
460 | } | |
461 | ||
42faad99 | 462 | static void cifs_umount_begin(struct super_block *sb) |
68058e75 | 463 | { |
42faad99 | 464 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
96daf2b0 | 465 | struct cifs_tcon *tcon; |
68058e75 | 466 | |
4523cc30 | 467 | if (cifs_sb == NULL) |
9e2e85f8 SF |
468 | return; |
469 | ||
0d424ad0 | 470 | tcon = cifs_sb_master_tcon(cifs_sb); |
f1987b44 | 471 | |
3f9bcca7 | 472 | spin_lock(&cifs_tcp_ses_lock); |
ad8034f1 SF |
473 | if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) { |
474 | /* we have other mounts to same share or we have | |
475 | already tried to force umount this and woken up | |
476 | all waiting network requests, nothing to do */ | |
3f9bcca7 | 477 | spin_unlock(&cifs_tcp_ses_lock); |
ad8034f1 SF |
478 | return; |
479 | } else if (tcon->tc_count == 1) | |
5e1253b5 | 480 | tcon->tidStatus = CifsExiting; |
3f9bcca7 | 481 | spin_unlock(&cifs_tcp_ses_lock); |
5e1253b5 | 482 | |
3a5ff61c | 483 | /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */ |
7b7abfe3 | 484 | /* cancel_notify_requests(tcon); */ |
50c2f753 | 485 | if (tcon->ses && tcon->ses->server) { |
b6b38f70 | 486 | cFYI(1, "wake up tasks now - umount begin not complete"); |
9e2e85f8 | 487 | wake_up_all(&tcon->ses->server->request_q); |
6ab16d24 SF |
488 | wake_up_all(&tcon->ses->server->response_q); |
489 | msleep(1); /* yield */ | |
490 | /* we have to kick the requests once more */ | |
491 | wake_up_all(&tcon->ses->server->response_q); | |
492 | msleep(1); | |
5e1253b5 | 493 | } |
68058e75 SF |
494 | |
495 | return; | |
496 | } | |
68058e75 | 497 | |
bf97d287 SF |
498 | #ifdef CONFIG_CIFS_STATS2 |
499 | static int cifs_show_stats(struct seq_file *s, struct vfsmount *mnt) | |
500 | { | |
501 | /* BB FIXME */ | |
502 | return 0; | |
503 | } | |
504 | #endif | |
505 | ||
1da177e4 LT |
506 | static int cifs_remount(struct super_block *sb, int *flags, char *data) |
507 | { | |
508 | *flags |= MS_NODIRATIME; | |
509 | return 0; | |
510 | } | |
511 | ||
45321ac5 | 512 | static int cifs_drop_inode(struct inode *inode) |
12420ac3 JL |
513 | { |
514 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
515 | ||
45321ac5 AV |
516 | /* no serverino => unconditional eviction */ |
517 | return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) || | |
518 | generic_drop_inode(inode); | |
12420ac3 JL |
519 | } |
520 | ||
ee9b6d61 | 521 | static const struct super_operations cifs_super_ops = { |
1da177e4 LT |
522 | .statfs = cifs_statfs, |
523 | .alloc_inode = cifs_alloc_inode, | |
524 | .destroy_inode = cifs_destroy_inode, | |
12420ac3 | 525 | .drop_inode = cifs_drop_inode, |
b57922d9 | 526 | .evict_inode = cifs_evict_inode, |
12420ac3 JL |
527 | /* .delete_inode = cifs_delete_inode, */ /* Do not need above |
528 | function unless later we add lazy close of inodes or unless the | |
50c2f753 SF |
529 | kernel forgets to call us with the same number of releases (closes) |
530 | as opens */ | |
1da177e4 | 531 | .show_options = cifs_show_options, |
7b7abfe3 | 532 | .umount_begin = cifs_umount_begin, |
1da177e4 | 533 | .remount_fs = cifs_remount, |
bf97d287 | 534 | #ifdef CONFIG_CIFS_STATS2 |
f46d3e11 | 535 | .show_stats = cifs_show_stats, |
bf97d287 | 536 | #endif |
1da177e4 LT |
537 | }; |
538 | ||
f87d39d9 SF |
539 | /* |
540 | * Get root dentry from superblock according to prefix path mount option. | |
541 | * Return dentry with refcount + 1 on success and NULL otherwise. | |
542 | */ | |
543 | static struct dentry * | |
544 | cifs_get_root(struct smb_vol *vol, struct super_block *sb) | |
545 | { | |
fec11dd9 | 546 | struct dentry *dentry; |
f87d39d9 | 547 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
fec11dd9 AV |
548 | char *full_path = NULL; |
549 | char *s, *p; | |
f87d39d9 | 550 | char sep; |
fec11dd9 | 551 | int xid; |
f87d39d9 SF |
552 | |
553 | full_path = cifs_build_path_to_root(vol, cifs_sb, | |
554 | cifs_sb_master_tcon(cifs_sb)); | |
555 | if (full_path == NULL) | |
9403c9c5 | 556 | return ERR_PTR(-ENOMEM); |
f87d39d9 SF |
557 | |
558 | cFYI(1, "Get root dentry for %s", full_path); | |
559 | ||
560 | xid = GetXid(); | |
561 | sep = CIFS_DIR_SEP(cifs_sb); | |
fec11dd9 AV |
562 | dentry = dget(sb->s_root); |
563 | p = s = full_path; | |
564 | ||
565 | do { | |
566 | struct inode *dir = dentry->d_inode; | |
567 | struct dentry *child; | |
568 | ||
569 | /* skip separators */ | |
570 | while (*s == sep) | |
571 | s++; | |
572 | if (!*s) | |
573 | break; | |
574 | p = s++; | |
575 | /* next separator */ | |
576 | while (*s && *s != sep) | |
577 | s++; | |
578 | ||
579 | mutex_lock(&dir->i_mutex); | |
580 | child = lookup_one_len(p, dentry, s - p); | |
581 | mutex_unlock(&dir->i_mutex); | |
582 | dput(dentry); | |
583 | dentry = child; | |
584 | } while (!IS_ERR(dentry)); | |
f87d39d9 SF |
585 | _FreeXid(xid); |
586 | kfree(full_path); | |
fec11dd9 | 587 | return dentry; |
f87d39d9 SF |
588 | } |
589 | ||
ee01a14d AV |
590 | static int cifs_set_super(struct super_block *sb, void *data) |
591 | { | |
592 | struct cifs_mnt_data *mnt_data = data; | |
593 | sb->s_fs_info = mnt_data->cifs_sb; | |
594 | return set_anon_super(sb, NULL); | |
595 | } | |
596 | ||
d753ed97 AV |
597 | static struct dentry * |
598 | cifs_do_mount(struct file_system_type *fs_type, | |
724d9f1c | 599 | int flags, const char *dev_name, void *data) |
1da177e4 LT |
600 | { |
601 | int rc; | |
db719222 | 602 | struct super_block *sb; |
724d9f1c PS |
603 | struct cifs_sb_info *cifs_sb; |
604 | struct smb_vol *volume_info; | |
25c7f41e | 605 | struct cifs_mnt_data mnt_data; |
724d9f1c | 606 | struct dentry *root; |
1da177e4 | 607 | |
b6b38f70 | 608 | cFYI(1, "Devname: %s flags: %d ", dev_name, flags); |
1da177e4 | 609 | |
04db79b0 JL |
610 | volume_info = cifs_get_volume_info((char *)data, dev_name); |
611 | if (IS_ERR(volume_info)) | |
612 | return ERR_CAST(volume_info); | |
724d9f1c PS |
613 | |
614 | cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL); | |
615 | if (cifs_sb == NULL) { | |
616 | root = ERR_PTR(-ENOMEM); | |
5c4f1ad7 | 617 | goto out_nls; |
724d9f1c PS |
618 | } |
619 | ||
5d3bc605 AV |
620 | cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL); |
621 | if (cifs_sb->mountdata == NULL) { | |
622 | root = ERR_PTR(-ENOMEM); | |
5c4f1ad7 | 623 | goto out_cifs_sb; |
5d3bc605 AV |
624 | } |
625 | ||
724d9f1c PS |
626 | cifs_setup_cifs_sb(volume_info, cifs_sb); |
627 | ||
97d1152a AV |
628 | rc = cifs_mount(cifs_sb, volume_info); |
629 | if (rc) { | |
630 | if (!(flags & MS_SILENT)) | |
631 | cERROR(1, "cifs_mount failed w/return code = %d", rc); | |
632 | root = ERR_PTR(rc); | |
5c4f1ad7 | 633 | goto out_mountdata; |
97d1152a AV |
634 | } |
635 | ||
25c7f41e PS |
636 | mnt_data.vol = volume_info; |
637 | mnt_data.cifs_sb = cifs_sb; | |
638 | mnt_data.flags = flags; | |
639 | ||
ee01a14d | 640 | sb = sget(fs_type, cifs_match_super, cifs_set_super, &mnt_data); |
724d9f1c | 641 | if (IS_ERR(sb)) { |
724d9f1c | 642 | root = ERR_CAST(sb); |
97d1152a | 643 | cifs_umount(cifs_sb); |
d757d71b | 644 | goto out; |
724d9f1c | 645 | } |
1da177e4 | 646 | |
ee01a14d | 647 | if (sb->s_root) { |
25c7f41e | 648 | cFYI(1, "Use existing superblock"); |
97d1152a | 649 | cifs_umount(cifs_sb); |
5c4f1ad7 AV |
650 | } else { |
651 | sb->s_flags = flags; | |
652 | /* BB should we make this contingent on mount parm? */ | |
653 | sb->s_flags |= MS_NODIRATIME | MS_NOATIME; | |
654 | ||
655 | rc = cifs_read_super(sb); | |
656 | if (rc) { | |
657 | root = ERR_PTR(rc); | |
658 | goto out_super; | |
659 | } | |
b2e5cd33 | 660 | |
5c4f1ad7 | 661 | sb->s_flags |= MS_ACTIVE; |
1da177e4 | 662 | } |
724d9f1c | 663 | |
f87d39d9 | 664 | root = cifs_get_root(volume_info, sb); |
9403c9c5 | 665 | if (IS_ERR(root)) |
f87d39d9 | 666 | goto out_super; |
25c7f41e | 667 | |
f87d39d9 | 668 | cFYI(1, "dentry root is: %p", root); |
641a58d6 | 669 | goto out; |
724d9f1c | 670 | |
641a58d6 | 671 | out_super: |
641a58d6 | 672 | deactivate_locked_super(sb); |
641a58d6 | 673 | out: |
f9e59bcb | 674 | cifs_cleanup_volume_info(volume_info); |
724d9f1c | 675 | return root; |
5c4f1ad7 AV |
676 | |
677 | out_mountdata: | |
678 | kfree(cifs_sb->mountdata); | |
679 | out_cifs_sb: | |
680 | kfree(cifs_sb); | |
681 | out_nls: | |
682 | unload_nls(volume_info->local_nls); | |
683 | goto out; | |
1da177e4 LT |
684 | } |
685 | ||
027445c3 BP |
686 | static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov, |
687 | unsigned long nr_segs, loff_t pos) | |
1da177e4 | 688 | { |
e6a00296 | 689 | struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode; |
1da177e4 | 690 | ssize_t written; |
72432ffc | 691 | int rc; |
1da177e4 | 692 | |
027445c3 | 693 | written = generic_file_aio_write(iocb, iov, nr_segs, pos); |
72432ffc PS |
694 | |
695 | if (CIFS_I(inode)->clientCanCacheAll) | |
696 | return written; | |
697 | ||
698 | rc = filemap_fdatawrite(inode->i_mapping); | |
699 | if (rc) | |
700 | cFYI(1, "cifs_file_aio_write: %d rc on %p inode", rc, inode); | |
701 | ||
1da177e4 LT |
702 | return written; |
703 | } | |
704 | ||
c32a0b68 SF |
705 | static loff_t cifs_llseek(struct file *file, loff_t offset, int origin) |
706 | { | |
707 | /* origin == SEEK_END => we must revalidate the cached file length */ | |
0889a944 | 708 | if (origin == SEEK_END) { |
6feb9891 PS |
709 | int rc; |
710 | struct inode *inode = file->f_path.dentry->d_inode; | |
711 | ||
712 | /* | |
713 | * We need to be sure that all dirty pages are written and the | |
714 | * server has the newest file length. | |
715 | */ | |
716 | if (!CIFS_I(inode)->clientCanCacheRead && inode->i_mapping && | |
717 | inode->i_mapping->nrpages != 0) { | |
718 | rc = filemap_fdatawait(inode->i_mapping); | |
156ecb2d SF |
719 | if (rc) { |
720 | mapping_set_error(inode->i_mapping, rc); | |
721 | return rc; | |
722 | } | |
6feb9891 PS |
723 | } |
724 | /* | |
725 | * Some applications poll for the file length in this strange | |
726 | * way so we must seek to end on non-oplocked files by | |
727 | * setting the revalidate time to zero. | |
728 | */ | |
729 | CIFS_I(inode)->time = 0; | |
730 | ||
731 | rc = cifs_revalidate_file_attr(file); | |
732 | if (rc < 0) | |
733 | return (loff_t)rc; | |
c32a0b68 | 734 | } |
9465efc9 | 735 | return generic_file_llseek_unlocked(file, offset, origin); |
c32a0b68 SF |
736 | } |
737 | ||
84210e91 SF |
738 | static int cifs_setlease(struct file *file, long arg, struct file_lock **lease) |
739 | { | |
b89f4321 AB |
740 | /* note that this is called by vfs setlease with lock_flocks held |
741 | to protect *lease from going away */ | |
84210e91 | 742 | struct inode *inode = file->f_path.dentry->d_inode; |
ba00ba64 | 743 | struct cifsFileInfo *cfile = file->private_data; |
84210e91 SF |
744 | |
745 | if (!(S_ISREG(inode->i_mode))) | |
746 | return -EINVAL; | |
747 | ||
748 | /* check if file is oplocked */ | |
749 | if (((arg == F_RDLCK) && | |
750 | (CIFS_I(inode)->clientCanCacheRead)) || | |
751 | ((arg == F_WRLCK) && | |
752 | (CIFS_I(inode)->clientCanCacheAll))) | |
753 | return generic_setlease(file, arg, lease); | |
13cfb733 JL |
754 | else if (tlink_tcon(cfile->tlink)->local_lease && |
755 | !CIFS_I(inode)->clientCanCacheRead) | |
84210e91 SF |
756 | /* If the server claims to support oplock on this |
757 | file, then we still need to check oplock even | |
758 | if the local_lease mount option is set, but there | |
759 | are servers which do not support oplock for which | |
760 | this mount option may be useful if the user | |
761 | knows that the file won't be changed on the server | |
762 | by anyone else */ | |
763 | return generic_setlease(file, arg, lease); | |
51ee4b84 | 764 | else |
84210e91 SF |
765 | return -EAGAIN; |
766 | } | |
84210e91 | 767 | |
e6ab1582 | 768 | struct file_system_type cifs_fs_type = { |
1da177e4 LT |
769 | .owner = THIS_MODULE, |
770 | .name = "cifs", | |
d753ed97 | 771 | .mount = cifs_do_mount, |
6d686175 | 772 | .kill_sb = cifs_kill_sb, |
1da177e4 LT |
773 | /* .fs_flags */ |
774 | }; | |
754661f1 | 775 | const struct inode_operations cifs_dir_inode_ops = { |
1da177e4 LT |
776 | .create = cifs_create, |
777 | .lookup = cifs_lookup, | |
778 | .getattr = cifs_getattr, | |
779 | .unlink = cifs_unlink, | |
780 | .link = cifs_hardlink, | |
781 | .mkdir = cifs_mkdir, | |
782 | .rmdir = cifs_rmdir, | |
783 | .rename = cifs_rename, | |
784 | .permission = cifs_permission, | |
785 | /* revalidate:cifs_revalidate, */ | |
786 | .setattr = cifs_setattr, | |
787 | .symlink = cifs_symlink, | |
788 | .mknod = cifs_mknod, | |
789 | #ifdef CONFIG_CIFS_XATTR | |
790 | .setxattr = cifs_setxattr, | |
791 | .getxattr = cifs_getxattr, | |
792 | .listxattr = cifs_listxattr, | |
793 | .removexattr = cifs_removexattr, | |
794 | #endif | |
795 | }; | |
796 | ||
754661f1 | 797 | const struct inode_operations cifs_file_inode_ops = { |
1da177e4 LT |
798 | /* revalidate:cifs_revalidate, */ |
799 | .setattr = cifs_setattr, | |
800 | .getattr = cifs_getattr, /* do we need this anymore? */ | |
801 | .rename = cifs_rename, | |
802 | .permission = cifs_permission, | |
803 | #ifdef CONFIG_CIFS_XATTR | |
804 | .setxattr = cifs_setxattr, | |
805 | .getxattr = cifs_getxattr, | |
806 | .listxattr = cifs_listxattr, | |
807 | .removexattr = cifs_removexattr, | |
50c2f753 | 808 | #endif |
1da177e4 LT |
809 | }; |
810 | ||
754661f1 | 811 | const struct inode_operations cifs_symlink_inode_ops = { |
50c2f753 | 812 | .readlink = generic_readlink, |
1da177e4 LT |
813 | .follow_link = cifs_follow_link, |
814 | .put_link = cifs_put_link, | |
815 | .permission = cifs_permission, | |
816 | /* BB add the following two eventually */ | |
817 | /* revalidate: cifs_revalidate, | |
818 | setattr: cifs_notify_change, *//* BB do we need notify change */ | |
819 | #ifdef CONFIG_CIFS_XATTR | |
820 | .setxattr = cifs_setxattr, | |
821 | .getxattr = cifs_getxattr, | |
822 | .listxattr = cifs_listxattr, | |
823 | .removexattr = cifs_removexattr, | |
50c2f753 | 824 | #endif |
1da177e4 LT |
825 | }; |
826 | ||
4b6f5d20 | 827 | const struct file_operations cifs_file_ops = { |
87c89dd7 SF |
828 | .read = do_sync_read, |
829 | .write = do_sync_write, | |
87c89dd7 SF |
830 | .aio_read = generic_file_aio_read, |
831 | .aio_write = cifs_file_aio_write, | |
1da177e4 LT |
832 | .open = cifs_open, |
833 | .release = cifs_close, | |
834 | .lock = cifs_lock, | |
835 | .fsync = cifs_fsync, | |
836 | .flush = cifs_flush, | |
837 | .mmap = cifs_file_mmap, | |
5ffc4ef4 | 838 | .splice_read = generic_file_splice_read, |
c32a0b68 | 839 | .llseek = cifs_llseek, |
c67593a0 | 840 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 841 | .unlocked_ioctl = cifs_ioctl, |
c67593a0 | 842 | #endif /* CONFIG_CIFS_POSIX */ |
84210e91 | 843 | .setlease = cifs_setlease, |
1da177e4 LT |
844 | }; |
845 | ||
8be7e6ba PS |
846 | const struct file_operations cifs_file_strict_ops = { |
847 | .read = do_sync_read, | |
848 | .write = do_sync_write, | |
a70307ee | 849 | .aio_read = cifs_strict_readv, |
72432ffc | 850 | .aio_write = cifs_strict_writev, |
8be7e6ba PS |
851 | .open = cifs_open, |
852 | .release = cifs_close, | |
853 | .lock = cifs_lock, | |
854 | .fsync = cifs_strict_fsync, | |
855 | .flush = cifs_flush, | |
7a6a19b1 | 856 | .mmap = cifs_file_strict_mmap, |
8be7e6ba PS |
857 | .splice_read = generic_file_splice_read, |
858 | .llseek = cifs_llseek, | |
859 | #ifdef CONFIG_CIFS_POSIX | |
860 | .unlocked_ioctl = cifs_ioctl, | |
861 | #endif /* CONFIG_CIFS_POSIX */ | |
862 | .setlease = cifs_setlease, | |
863 | }; | |
864 | ||
4b6f5d20 | 865 | const struct file_operations cifs_file_direct_ops = { |
0b81c1c4 PS |
866 | /* BB reevaluate whether they can be done with directio, no cache */ |
867 | .read = do_sync_read, | |
868 | .write = do_sync_write, | |
869 | .aio_read = cifs_user_readv, | |
870 | .aio_write = cifs_user_writev, | |
1da177e4 LT |
871 | .open = cifs_open, |
872 | .release = cifs_close, | |
873 | .lock = cifs_lock, | |
874 | .fsync = cifs_fsync, | |
875 | .flush = cifs_flush, | |
a994b8fa | 876 | .mmap = cifs_file_mmap, |
5ffc4ef4 | 877 | .splice_read = generic_file_splice_read, |
c67593a0 | 878 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 879 | .unlocked_ioctl = cifs_ioctl, |
c67593a0 | 880 | #endif /* CONFIG_CIFS_POSIX */ |
c32a0b68 | 881 | .llseek = cifs_llseek, |
84210e91 | 882 | .setlease = cifs_setlease, |
1da177e4 | 883 | }; |
8be7e6ba | 884 | |
4b6f5d20 | 885 | const struct file_operations cifs_file_nobrl_ops = { |
87c89dd7 SF |
886 | .read = do_sync_read, |
887 | .write = do_sync_write, | |
87c89dd7 SF |
888 | .aio_read = generic_file_aio_read, |
889 | .aio_write = cifs_file_aio_write, | |
890 | .open = cifs_open, | |
891 | .release = cifs_close, | |
892 | .fsync = cifs_fsync, | |
893 | .flush = cifs_flush, | |
894 | .mmap = cifs_file_mmap, | |
5ffc4ef4 | 895 | .splice_read = generic_file_splice_read, |
c32a0b68 | 896 | .llseek = cifs_llseek, |
8b94bcb9 | 897 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 898 | .unlocked_ioctl = cifs_ioctl, |
8b94bcb9 | 899 | #endif /* CONFIG_CIFS_POSIX */ |
84210e91 | 900 | .setlease = cifs_setlease, |
8b94bcb9 SF |
901 | }; |
902 | ||
8be7e6ba PS |
903 | const struct file_operations cifs_file_strict_nobrl_ops = { |
904 | .read = do_sync_read, | |
905 | .write = do_sync_write, | |
a70307ee | 906 | .aio_read = cifs_strict_readv, |
72432ffc | 907 | .aio_write = cifs_strict_writev, |
8be7e6ba PS |
908 | .open = cifs_open, |
909 | .release = cifs_close, | |
910 | .fsync = cifs_strict_fsync, | |
911 | .flush = cifs_flush, | |
7a6a19b1 | 912 | .mmap = cifs_file_strict_mmap, |
8be7e6ba PS |
913 | .splice_read = generic_file_splice_read, |
914 | .llseek = cifs_llseek, | |
915 | #ifdef CONFIG_CIFS_POSIX | |
916 | .unlocked_ioctl = cifs_ioctl, | |
917 | #endif /* CONFIG_CIFS_POSIX */ | |
918 | .setlease = cifs_setlease, | |
919 | }; | |
920 | ||
4b6f5d20 | 921 | const struct file_operations cifs_file_direct_nobrl_ops = { |
0b81c1c4 PS |
922 | /* BB reevaluate whether they can be done with directio, no cache */ |
923 | .read = do_sync_read, | |
924 | .write = do_sync_write, | |
925 | .aio_read = cifs_user_readv, | |
926 | .aio_write = cifs_user_writev, | |
87c89dd7 SF |
927 | .open = cifs_open, |
928 | .release = cifs_close, | |
929 | .fsync = cifs_fsync, | |
930 | .flush = cifs_flush, | |
810627a0 | 931 | .mmap = cifs_file_mmap, |
5ffc4ef4 | 932 | .splice_read = generic_file_splice_read, |
8b94bcb9 | 933 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 934 | .unlocked_ioctl = cifs_ioctl, |
8b94bcb9 | 935 | #endif /* CONFIG_CIFS_POSIX */ |
c32a0b68 | 936 | .llseek = cifs_llseek, |
84210e91 | 937 | .setlease = cifs_setlease, |
8b94bcb9 | 938 | }; |
1da177e4 | 939 | |
4b6f5d20 | 940 | const struct file_operations cifs_dir_ops = { |
1da177e4 LT |
941 | .readdir = cifs_readdir, |
942 | .release = cifs_closedir, | |
943 | .read = generic_read_dir, | |
f9ddcca4 | 944 | .unlocked_ioctl = cifs_ioctl, |
3222a3e5 | 945 | .llseek = generic_file_llseek, |
1da177e4 LT |
946 | }; |
947 | ||
948 | static void | |
51cc5068 | 949 | cifs_init_once(void *inode) |
1da177e4 LT |
950 | { |
951 | struct cifsInodeInfo *cifsi = inode; | |
952 | ||
a35afb83 CL |
953 | inode_init_once(&cifsi->vfs_inode); |
954 | INIT_LIST_HEAD(&cifsi->lockList); | |
1da177e4 LT |
955 | } |
956 | ||
957 | static int | |
958 | cifs_init_inodecache(void) | |
959 | { | |
960 | cifs_inode_cachep = kmem_cache_create("cifs_inode_cache", | |
26f57364 | 961 | sizeof(struct cifsInodeInfo), |
fffb60f9 PJ |
962 | 0, (SLAB_RECLAIM_ACCOUNT| |
963 | SLAB_MEM_SPREAD), | |
20c2df83 | 964 | cifs_init_once); |
1da177e4 LT |
965 | if (cifs_inode_cachep == NULL) |
966 | return -ENOMEM; | |
967 | ||
968 | return 0; | |
969 | } | |
970 | ||
971 | static void | |
972 | cifs_destroy_inodecache(void) | |
973 | { | |
1a1d92c1 | 974 | kmem_cache_destroy(cifs_inode_cachep); |
1da177e4 LT |
975 | } |
976 | ||
977 | static int | |
978 | cifs_init_request_bufs(void) | |
979 | { | |
4523cc30 | 980 | if (CIFSMaxBufSize < 8192) { |
1da177e4 LT |
981 | /* Buffer size can not be smaller than 2 * PATH_MAX since maximum |
982 | Unicode path name has to fit in any SMB/CIFS path based frames */ | |
983 | CIFSMaxBufSize = 8192; | |
984 | } else if (CIFSMaxBufSize > 1024*127) { | |
985 | CIFSMaxBufSize = 1024 * 127; | |
986 | } else { | |
987 | CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/ | |
988 | } | |
b6b38f70 | 989 | /* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */ |
1da177e4 LT |
990 | cifs_req_cachep = kmem_cache_create("cifs_request", |
991 | CIFSMaxBufSize + | |
992 | MAX_CIFS_HDR_SIZE, 0, | |
20c2df83 | 993 | SLAB_HWCACHE_ALIGN, NULL); |
1da177e4 LT |
994 | if (cifs_req_cachep == NULL) |
995 | return -ENOMEM; | |
996 | ||
4523cc30 | 997 | if (cifs_min_rcv < 1) |
1da177e4 LT |
998 | cifs_min_rcv = 1; |
999 | else if (cifs_min_rcv > 64) { | |
1000 | cifs_min_rcv = 64; | |
b6b38f70 | 1001 | cERROR(1, "cifs_min_rcv set to maximum (64)"); |
1da177e4 LT |
1002 | } |
1003 | ||
93d2341c MD |
1004 | cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv, |
1005 | cifs_req_cachep); | |
1da177e4 | 1006 | |
4523cc30 | 1007 | if (cifs_req_poolp == NULL) { |
1da177e4 LT |
1008 | kmem_cache_destroy(cifs_req_cachep); |
1009 | return -ENOMEM; | |
1010 | } | |
ec637e3f | 1011 | /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and |
1da177e4 LT |
1012 | almost all handle based requests (but not write response, nor is it |
1013 | sufficient for path based requests). A smaller size would have | |
50c2f753 | 1014 | been more efficient (compacting multiple slab items on one 4k page) |
1da177e4 LT |
1015 | for the case in which debug was on, but this larger size allows |
1016 | more SMBs to use small buffer alloc and is still much more | |
6dc0f87e | 1017 | efficient to alloc 1 per page off the slab compared to 17K (5page) |
1da177e4 LT |
1018 | alloc of large cifs buffers even when page debugging is on */ |
1019 | cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq", | |
6dc0f87e | 1020 | MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN, |
20c2df83 | 1021 | NULL); |
1da177e4 LT |
1022 | if (cifs_sm_req_cachep == NULL) { |
1023 | mempool_destroy(cifs_req_poolp); | |
1024 | kmem_cache_destroy(cifs_req_cachep); | |
6dc0f87e | 1025 | return -ENOMEM; |
1da177e4 LT |
1026 | } |
1027 | ||
4523cc30 | 1028 | if (cifs_min_small < 2) |
1da177e4 LT |
1029 | cifs_min_small = 2; |
1030 | else if (cifs_min_small > 256) { | |
1031 | cifs_min_small = 256; | |
b6b38f70 | 1032 | cFYI(1, "cifs_min_small set to maximum (256)"); |
1da177e4 LT |
1033 | } |
1034 | ||
93d2341c MD |
1035 | cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small, |
1036 | cifs_sm_req_cachep); | |
1da177e4 | 1037 | |
4523cc30 | 1038 | if (cifs_sm_req_poolp == NULL) { |
1da177e4 LT |
1039 | mempool_destroy(cifs_req_poolp); |
1040 | kmem_cache_destroy(cifs_req_cachep); | |
1041 | kmem_cache_destroy(cifs_sm_req_cachep); | |
1042 | return -ENOMEM; | |
1043 | } | |
1044 | ||
1045 | return 0; | |
1046 | } | |
1047 | ||
1048 | static void | |
1049 | cifs_destroy_request_bufs(void) | |
1050 | { | |
1051 | mempool_destroy(cifs_req_poolp); | |
1a1d92c1 | 1052 | kmem_cache_destroy(cifs_req_cachep); |
1da177e4 | 1053 | mempool_destroy(cifs_sm_req_poolp); |
1a1d92c1 | 1054 | kmem_cache_destroy(cifs_sm_req_cachep); |
1da177e4 LT |
1055 | } |
1056 | ||
1057 | static int | |
1058 | cifs_init_mids(void) | |
1059 | { | |
1060 | cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids", | |
26f57364 SF |
1061 | sizeof(struct mid_q_entry), 0, |
1062 | SLAB_HWCACHE_ALIGN, NULL); | |
1da177e4 LT |
1063 | if (cifs_mid_cachep == NULL) |
1064 | return -ENOMEM; | |
1065 | ||
93d2341c MD |
1066 | /* 3 is a reasonable minimum number of simultaneous operations */ |
1067 | cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep); | |
4523cc30 | 1068 | if (cifs_mid_poolp == NULL) { |
1da177e4 LT |
1069 | kmem_cache_destroy(cifs_mid_cachep); |
1070 | return -ENOMEM; | |
1071 | } | |
1072 | ||
1da177e4 LT |
1073 | return 0; |
1074 | } | |
1075 | ||
1076 | static void | |
1077 | cifs_destroy_mids(void) | |
1078 | { | |
1079 | mempool_destroy(cifs_mid_poolp); | |
1a1d92c1 | 1080 | kmem_cache_destroy(cifs_mid_cachep); |
1da177e4 LT |
1081 | } |
1082 | ||
1da177e4 LT |
1083 | static int __init |
1084 | init_cifs(void) | |
1085 | { | |
1086 | int rc = 0; | |
1da177e4 | 1087 | cifs_proc_init(); |
e7ddee90 | 1088 | INIT_LIST_HEAD(&cifs_tcp_ses_list); |
0eff0e26 | 1089 | #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */ |
4ca9c190 SF |
1090 | INIT_LIST_HEAD(&GlobalDnotifyReqList); |
1091 | INIT_LIST_HEAD(&GlobalDnotifyRsp_Q); | |
0eff0e26 | 1092 | #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */ |
1da177e4 LT |
1093 | /* |
1094 | * Initialize Global counters | |
1095 | */ | |
1096 | atomic_set(&sesInfoAllocCount, 0); | |
1097 | atomic_set(&tconInfoAllocCount, 0); | |
6dc0f87e | 1098 | atomic_set(&tcpSesAllocCount, 0); |
1da177e4 LT |
1099 | atomic_set(&tcpSesReconnectCount, 0); |
1100 | atomic_set(&tconInfoReconnectCount, 0); | |
1101 | ||
1102 | atomic_set(&bufAllocCount, 0); | |
4498eed5 SF |
1103 | atomic_set(&smBufAllocCount, 0); |
1104 | #ifdef CONFIG_CIFS_STATS2 | |
1105 | atomic_set(&totBufAllocCount, 0); | |
1106 | atomic_set(&totSmBufAllocCount, 0); | |
1107 | #endif /* CONFIG_CIFS_STATS2 */ | |
1108 | ||
1da177e4 LT |
1109 | atomic_set(&midCount, 0); |
1110 | GlobalCurrentXid = 0; | |
1111 | GlobalTotalActiveXid = 0; | |
1112 | GlobalMaxActiveXid = 0; | |
3f9bcca7 | 1113 | spin_lock_init(&cifs_tcp_ses_lock); |
4477288a | 1114 | spin_lock_init(&cifs_file_list_lock); |
1da177e4 LT |
1115 | spin_lock_init(&GlobalMid_Lock); |
1116 | ||
4523cc30 | 1117 | if (cifs_max_pending < 2) { |
1da177e4 | 1118 | cifs_max_pending = 2; |
b6b38f70 | 1119 | cFYI(1, "cifs_max_pending set to min of 2"); |
4523cc30 | 1120 | } else if (cifs_max_pending > 256) { |
1da177e4 | 1121 | cifs_max_pending = 256; |
b6b38f70 | 1122 | cFYI(1, "cifs_max_pending set to max of 256"); |
1da177e4 LT |
1123 | } |
1124 | ||
f579cf3c SJ |
1125 | rc = cifs_fscache_register(); |
1126 | if (rc) | |
d3bf5221 | 1127 | goto out_clean_proc; |
f579cf3c | 1128 | |
1da177e4 | 1129 | rc = cifs_init_inodecache(); |
45af7a0f | 1130 | if (rc) |
d3bf5221 | 1131 | goto out_unreg_fscache; |
45af7a0f SF |
1132 | |
1133 | rc = cifs_init_mids(); | |
1134 | if (rc) | |
1135 | goto out_destroy_inodecache; | |
1136 | ||
1137 | rc = cifs_init_request_bufs(); | |
1138 | if (rc) | |
1139 | goto out_destroy_mids; | |
1140 | ||
84a15b93 JL |
1141 | #ifdef CONFIG_CIFS_UPCALL |
1142 | rc = register_key_type(&cifs_spnego_key_type); | |
1143 | if (rc) | |
4d79dba0 SP |
1144 | goto out_destroy_request_bufs; |
1145 | #endif /* CONFIG_CIFS_UPCALL */ | |
1146 | ||
1147 | #ifdef CONFIG_CIFS_ACL | |
1148 | rc = init_cifs_idmap(); | |
1149 | if (rc) | |
c4aca0c0 | 1150 | goto out_register_key_type; |
4d79dba0 SP |
1151 | #endif /* CONFIG_CIFS_ACL */ |
1152 | ||
1153 | rc = register_filesystem(&cifs_fs_type); | |
1154 | if (rc) | |
c4aca0c0 | 1155 | goto out_init_cifs_idmap; |
45af7a0f | 1156 | |
45af7a0f SF |
1157 | return 0; |
1158 | ||
c4aca0c0 | 1159 | out_init_cifs_idmap: |
4d79dba0 SP |
1160 | #ifdef CONFIG_CIFS_ACL |
1161 | exit_cifs_idmap(); | |
c4aca0c0 | 1162 | out_register_key_type: |
4d79dba0 | 1163 | #endif |
84a15b93 | 1164 | #ifdef CONFIG_CIFS_UPCALL |
4d79dba0 | 1165 | unregister_key_type(&cifs_spnego_key_type); |
c4aca0c0 | 1166 | out_destroy_request_bufs: |
1fc7995d | 1167 | #endif |
45af7a0f | 1168 | cifs_destroy_request_bufs(); |
d3bf5221 | 1169 | out_destroy_mids: |
45af7a0f | 1170 | cifs_destroy_mids(); |
d3bf5221 | 1171 | out_destroy_inodecache: |
45af7a0f | 1172 | cifs_destroy_inodecache(); |
d3bf5221 | 1173 | out_unreg_fscache: |
f579cf3c | 1174 | cifs_fscache_unregister(); |
d3bf5221 SF |
1175 | out_clean_proc: |
1176 | cifs_proc_clean(); | |
1da177e4 LT |
1177 | return rc; |
1178 | } | |
1179 | ||
1180 | static void __exit | |
1181 | exit_cifs(void) | |
1182 | { | |
b6b38f70 | 1183 | cFYI(DBG2, "exit_cifs"); |
1da177e4 | 1184 | cifs_proc_clean(); |
f579cf3c | 1185 | cifs_fscache_unregister(); |
6103335d | 1186 | #ifdef CONFIG_CIFS_DFS_UPCALL |
78d31a3a | 1187 | cifs_dfs_release_automount_timer(); |
6103335d | 1188 | #endif |
4d79dba0 SP |
1189 | #ifdef CONFIG_CIFS_ACL |
1190 | cifs_destroy_idmaptrees(); | |
1191 | exit_cifs_idmap(); | |
1192 | #endif | |
84a15b93 JL |
1193 | #ifdef CONFIG_CIFS_UPCALL |
1194 | unregister_key_type(&cifs_spnego_key_type); | |
1da177e4 LT |
1195 | #endif |
1196 | unregister_filesystem(&cifs_fs_type); | |
1197 | cifs_destroy_inodecache(); | |
1198 | cifs_destroy_mids(); | |
1199 | cifs_destroy_request_bufs(); | |
1da177e4 LT |
1200 | } |
1201 | ||
1202 | MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>"); | |
6dc0f87e | 1203 | MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */ |
1da177e4 | 1204 | MODULE_DESCRIPTION |
63135e08 SF |
1205 | ("VFS to access servers complying with the SNIA CIFS Specification " |
1206 | "e.g. Samba and Windows"); | |
1da177e4 LT |
1207 | MODULE_VERSION(CIFS_VERSION); |
1208 | module_init(init_cifs) | |
1209 | module_exit(exit_cifs) |