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" |
3792c173 PS |
51 | #ifdef CONFIG_CIFS_SMB2 |
52 | #include "smb2pdu.h" | |
53 | #endif | |
1da177e4 LT |
54 | #define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */ |
55 | ||
1da177e4 LT |
56 | int cifsFYI = 0; |
57 | int cifsERROR = 1; | |
58 | int traceSMB = 0; | |
e7504734 | 59 | bool enable_oplocks = true; |
1da177e4 LT |
60 | unsigned int linuxExtEnabled = 1; |
61 | unsigned int lookupCacheEnabled = 1; | |
04912d6a | 62 | unsigned int global_secflags = CIFSSEC_DEF; |
3979877e | 63 | /* unsigned int ntlmv2_support = 0; */ |
1da177e4 | 64 | unsigned int sign_CIFS_PDUs = 1; |
ee9b6d61 | 65 | static const struct super_operations cifs_super_ops; |
1da177e4 LT |
66 | unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE; |
67 | module_param(CIFSMaxBufSize, int, 0); | |
63135e08 SF |
68 | MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). " |
69 | "Default: 16384 Range: 8192 to 130048"); | |
1da177e4 LT |
70 | unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL; |
71 | module_param(cifs_min_rcv, int, 0); | |
63135e08 SF |
72 | MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: " |
73 | "1 to 64"); | |
1da177e4 LT |
74 | unsigned int cifs_min_small = 30; |
75 | module_param(cifs_min_small, int, 0); | |
63135e08 SF |
76 | MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 " |
77 | "Range: 2 to 256"); | |
1da177e4 | 78 | unsigned int cifs_max_pending = CIFS_MAX_REQ; |
fef33df8 | 79 | module_param(cifs_max_pending, int, 0444); |
63135e08 | 80 | MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. " |
10b9b98e | 81 | "Default: 32767 Range: 2 to 32767."); |
e7504734 SF |
82 | module_param(enable_oplocks, bool, 0644); |
83 | MODULE_PARM_DESC(enable_oplocks, "Enable or disable oplocks (bool). Default:" | |
84 | "y/Y/1"); | |
85 | ||
1da177e4 LT |
86 | extern mempool_t *cifs_sm_req_poolp; |
87 | extern mempool_t *cifs_req_poolp; | |
88 | extern mempool_t *cifs_mid_poolp; | |
89 | ||
da472fc8 JL |
90 | struct workqueue_struct *cifsiod_wq; |
91 | ||
33319141 PS |
92 | #ifdef CONFIG_HIGHMEM |
93 | DEFINE_MUTEX(cifs_kmap_mutex); | |
94 | #endif | |
95 | ||
1da177e4 | 96 | static int |
97d1152a | 97 | cifs_read_super(struct super_block *sb) |
1da177e4 LT |
98 | { |
99 | struct inode *inode; | |
b2e5cd33 | 100 | struct cifs_sb_info *cifs_sb; |
1da177e4 | 101 | int rc = 0; |
50c2f753 | 102 | |
b2e5cd33 | 103 | cifs_sb = CIFS_SB(sb); |
1da177e4 | 104 | |
2c6292ae AV |
105 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIXACL) |
106 | sb->s_flags |= MS_POSIXACL; | |
107 | ||
108 | if (cifs_sb_master_tcon(cifs_sb)->ses->capabilities & CAP_LARGE_FILES) | |
109 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
110 | else | |
111 | sb->s_maxbytes = MAX_NON_LFS; | |
112 | ||
113 | /* BB FIXME fix time_gran to be larger for LANMAN sessions */ | |
114 | sb->s_time_gran = 100; | |
115 | ||
1da177e4 LT |
116 | sb->s_magic = CIFS_MAGIC_NUMBER; |
117 | sb->s_op = &cifs_super_ops; | |
8044f7f4 | 118 | sb->s_bdi = &cifs_sb->bdi; |
1da177e4 LT |
119 | sb->s_blocksize = CIFS_MAX_MSGSIZE; |
120 | sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */ | |
9b6763e0 | 121 | inode = cifs_root_iget(sb); |
1da177e4 | 122 | |
ce634ab2 DH |
123 | if (IS_ERR(inode)) { |
124 | rc = PTR_ERR(inode); | |
1da177e4 LT |
125 | goto out_no_root; |
126 | } | |
127 | ||
48fde701 | 128 | sb->s_root = d_make_root(inode); |
1da177e4 LT |
129 | if (!sb->s_root) { |
130 | rc = -ENOMEM; | |
131 | goto out_no_root; | |
132 | } | |
50c2f753 | 133 | |
ea4b5740 | 134 | /* do that *after* d_make_root() - we want NULL ->d_op for root here */ |
1c929cfe AV |
135 | if (cifs_sb_master_tcon(cifs_sb)->nocase) |
136 | sb->s_d_op = &cifs_ci_dentry_ops; | |
137 | else | |
138 | sb->s_d_op = &cifs_dentry_ops; | |
139 | ||
f3a6a60e | 140 | #ifdef CONFIG_CIFS_NFSD_EXPORT |
7521a3c5 | 141 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
b6b38f70 | 142 | cFYI(1, "export ops supported"); |
7521a3c5 SF |
143 | sb->s_export_op = &cifs_export_ops; |
144 | } | |
f3a6a60e | 145 | #endif /* CONFIG_CIFS_NFSD_EXPORT */ |
1da177e4 LT |
146 | |
147 | return 0; | |
148 | ||
149 | out_no_root: | |
b6b38f70 | 150 | cERROR(1, "cifs_read_super: get root inode failed"); |
1da177e4 LT |
151 | return rc; |
152 | } | |
153 | ||
6d686175 AV |
154 | static void cifs_kill_sb(struct super_block *sb) |
155 | { | |
156 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
157 | kill_anon_super(sb); | |
98ab494d | 158 | cifs_umount(cifs_sb); |
1da177e4 LT |
159 | } |
160 | ||
161 | static int | |
726c3342 | 162 | cifs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 163 | { |
726c3342 | 164 | struct super_block *sb = dentry->d_sb; |
39da9847 | 165 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
96daf2b0 | 166 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
c81156dd | 167 | int rc = -EOPNOTSUPP; |
6d5786a3 | 168 | unsigned int xid; |
1da177e4 | 169 | |
6d5786a3 | 170 | xid = get_xid(); |
1da177e4 | 171 | |
1da177e4 LT |
172 | buf->f_type = CIFS_MAGIC_NUMBER; |
173 | ||
39da9847 SF |
174 | /* |
175 | * PATH_MAX may be too long - it would presumably be total path, | |
176 | * but note that some servers (includinng Samba 3) have a shorter | |
177 | * maximum path. | |
178 | * | |
179 | * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO. | |
180 | */ | |
181 | buf->f_namelen = PATH_MAX; | |
1da177e4 LT |
182 | buf->f_files = 0; /* undefined */ |
183 | buf->f_ffree = 0; /* unlimited */ | |
184 | ||
39da9847 SF |
185 | /* |
186 | * We could add a second check for a QFS Unix capability bit | |
187 | */ | |
188 | if ((tcon->ses->capabilities & CAP_UNIX) && | |
189 | (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability))) | |
190 | rc = CIFSSMBQFSPosixInfo(xid, tcon, buf); | |
191 | ||
192 | /* | |
193 | * Only need to call the old QFSInfo if failed on newer one, | |
194 | * e.g. by OS/2. | |
195 | **/ | |
196 | if (rc && (tcon->ses->capabilities & CAP_NT_SMBS)) | |
197 | rc = CIFSSMBQFSInfo(xid, tcon, buf); | |
198 | ||
199 | /* | |
200 | * Some old Windows servers also do not support level 103, retry with | |
201 | * older level one if old server failed the previous call or we | |
202 | * bypassed it because we detected that this was an older LANMAN sess | |
203 | */ | |
4523cc30 | 204 | if (rc) |
39da9847 SF |
205 | rc = SMBOldQFSInfo(xid, tcon, buf); |
206 | ||
6d5786a3 | 207 | free_xid(xid); |
39da9847 | 208 | return 0; |
1da177e4 LT |
209 | } |
210 | ||
10556cb2 | 211 | static int cifs_permission(struct inode *inode, int mask) |
1da177e4 LT |
212 | { |
213 | struct cifs_sb_info *cifs_sb; | |
214 | ||
215 | cifs_sb = CIFS_SB(inode->i_sb); | |
216 | ||
f696a365 MS |
217 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) { |
218 | if ((mask & MAY_EXEC) && !execute_ok(inode)) | |
219 | return -EACCES; | |
220 | else | |
221 | return 0; | |
222 | } else /* file mode might have been restricted at mount time | |
50c2f753 | 223 | on the client (above and beyond ACL on servers) for |
1da177e4 | 224 | servers which do not support setting and viewing mode bits, |
50c2f753 | 225 | so allowing client to check permissions is useful */ |
2830ba7f | 226 | return generic_permission(inode, mask); |
1da177e4 LT |
227 | } |
228 | ||
e18b890b CL |
229 | static struct kmem_cache *cifs_inode_cachep; |
230 | static struct kmem_cache *cifs_req_cachep; | |
231 | static struct kmem_cache *cifs_mid_cachep; | |
e18b890b | 232 | static struct kmem_cache *cifs_sm_req_cachep; |
1da177e4 LT |
233 | mempool_t *cifs_sm_req_poolp; |
234 | mempool_t *cifs_req_poolp; | |
235 | mempool_t *cifs_mid_poolp; | |
236 | ||
237 | static struct inode * | |
238 | cifs_alloc_inode(struct super_block *sb) | |
239 | { | |
240 | struct cifsInodeInfo *cifs_inode; | |
e94b1766 | 241 | cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
242 | if (!cifs_inode) |
243 | return NULL; | |
244 | cifs_inode->cifsAttrs = 0x20; /* default */ | |
1da177e4 LT |
245 | cifs_inode->time = 0; |
246 | /* Until the file is open and we have gotten oplock | |
247 | info back from the server, can not assume caching of | |
248 | file data or metadata */ | |
c6723628 | 249 | cifs_set_oplock_level(cifs_inode, 0); |
9a8165fc | 250 | cifs_inode->delete_pending = false; |
df2cf170 | 251 | cifs_inode->invalid_mapping = false; |
1da177e4 | 252 | cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */ |
fbec9ab9 | 253 | cifs_inode->server_eof = 0; |
20054bd6 JL |
254 | cifs_inode->uniqueid = 0; |
255 | cifs_inode->createtime = 0; | |
50c2f753 | 256 | |
1b2b2126 SF |
257 | /* Can not set i_flags here - they get immediately overwritten |
258 | to zero by the VFS */ | |
259 | /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/ | |
1da177e4 LT |
260 | INIT_LIST_HEAD(&cifs_inode->openFileList); |
261 | return &cifs_inode->vfs_inode; | |
262 | } | |
263 | ||
fa0d7e3d NP |
264 | static void cifs_i_callback(struct rcu_head *head) |
265 | { | |
266 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
fa0d7e3d NP |
267 | kmem_cache_free(cifs_inode_cachep, CIFS_I(inode)); |
268 | } | |
269 | ||
1da177e4 LT |
270 | static void |
271 | cifs_destroy_inode(struct inode *inode) | |
272 | { | |
fa0d7e3d | 273 | call_rcu(&inode->i_rcu, cifs_i_callback); |
1da177e4 LT |
274 | } |
275 | ||
9451a9a5 | 276 | static void |
b57922d9 | 277 | cifs_evict_inode(struct inode *inode) |
9451a9a5 | 278 | { |
b57922d9 | 279 | truncate_inode_pages(&inode->i_data, 0); |
dbd5768f | 280 | clear_inode(inode); |
9451a9a5 SJ |
281 | cifs_fscache_release_inode_cookie(inode); |
282 | } | |
283 | ||
61f98ffd JL |
284 | static void |
285 | cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server) | |
286 | { | |
a9f1b85e PS |
287 | struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr; |
288 | struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr; | |
289 | ||
61f98ffd JL |
290 | seq_printf(s, ",addr="); |
291 | ||
a9f1b85e | 292 | switch (server->dstaddr.ss_family) { |
61f98ffd | 293 | case AF_INET: |
a9f1b85e | 294 | seq_printf(s, "%pI4", &sa->sin_addr.s_addr); |
61f98ffd JL |
295 | break; |
296 | case AF_INET6: | |
a9f1b85e PS |
297 | seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr); |
298 | if (sa6->sin6_scope_id) | |
299 | seq_printf(s, "%%%u", sa6->sin6_scope_id); | |
61f98ffd JL |
300 | break; |
301 | default: | |
302 | seq_printf(s, "(unknown)"); | |
303 | } | |
304 | } | |
305 | ||
3e715513 JL |
306 | static void |
307 | cifs_show_security(struct seq_file *s, struct TCP_Server_Info *server) | |
308 | { | |
309 | seq_printf(s, ",sec="); | |
310 | ||
311 | switch (server->secType) { | |
312 | case LANMAN: | |
313 | seq_printf(s, "lanman"); | |
314 | break; | |
315 | case NTLMv2: | |
316 | seq_printf(s, "ntlmv2"); | |
317 | break; | |
318 | case NTLM: | |
319 | seq_printf(s, "ntlm"); | |
320 | break; | |
321 | case Kerberos: | |
322 | seq_printf(s, "krb5"); | |
323 | break; | |
324 | case RawNTLMSSP: | |
325 | seq_printf(s, "ntlmssp"); | |
326 | break; | |
327 | default: | |
328 | /* shouldn't ever happen */ | |
329 | seq_printf(s, "unknown"); | |
330 | break; | |
331 | } | |
332 | ||
333 | if (server->sec_mode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) | |
334 | seq_printf(s, "i"); | |
335 | } | |
336 | ||
d06b5056 JL |
337 | static void |
338 | cifs_show_cache_flavor(struct seq_file *s, struct cifs_sb_info *cifs_sb) | |
339 | { | |
340 | seq_printf(s, ",cache="); | |
341 | ||
342 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO) | |
343 | seq_printf(s, "strict"); | |
344 | else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) | |
345 | seq_printf(s, "none"); | |
346 | else | |
347 | seq_printf(s, "loose"); | |
348 | } | |
349 | ||
1da177e4 LT |
350 | /* |
351 | * cifs_show_options() is for displaying mount options in /proc/mounts. | |
352 | * Not all settable options are displayed but most of the important | |
353 | * ones are. | |
354 | */ | |
355 | static int | |
34c80b1d | 356 | cifs_show_options(struct seq_file *s, struct dentry *root) |
1da177e4 | 357 | { |
34c80b1d | 358 | struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb); |
96daf2b0 | 359 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
3eb9a889 BG |
360 | struct sockaddr *srcaddr; |
361 | srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr; | |
8616e0fc | 362 | |
23db65f5 | 363 | seq_printf(s, ",vers=%s", tcon->ses->server->vals->version_string); |
3e715513 | 364 | cifs_show_security(s, tcon->ses->server); |
d06b5056 | 365 | cifs_show_cache_flavor(s, cifs_sb); |
3e715513 | 366 | |
8e047d09 | 367 | seq_printf(s, ",unc=%s", tcon->treeName); |
29e07c82 JL |
368 | |
369 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) | |
370 | seq_printf(s, ",multiuser"); | |
8727c8a8 SF |
371 | else if (tcon->ses->user_name) |
372 | seq_printf(s, ",username=%s", tcon->ses->user_name); | |
29e07c82 | 373 | |
8616e0fc JL |
374 | if (tcon->ses->domainName) |
375 | seq_printf(s, ",domain=%s", tcon->ses->domainName); | |
376 | ||
3eb9a889 BG |
377 | if (srcaddr->sa_family != AF_UNSPEC) { |
378 | struct sockaddr_in *saddr4; | |
379 | struct sockaddr_in6 *saddr6; | |
380 | saddr4 = (struct sockaddr_in *)srcaddr; | |
381 | saddr6 = (struct sockaddr_in6 *)srcaddr; | |
382 | if (srcaddr->sa_family == AF_INET6) | |
383 | seq_printf(s, ",srcaddr=%pI6c", | |
384 | &saddr6->sin6_addr); | |
385 | else if (srcaddr->sa_family == AF_INET) | |
386 | seq_printf(s, ",srcaddr=%pI4", | |
387 | &saddr4->sin_addr.s_addr); | |
388 | else | |
389 | seq_printf(s, ",srcaddr=BAD-AF:%i", | |
390 | (int)(srcaddr->sa_family)); | |
391 | } | |
392 | ||
28f88810 | 393 | seq_printf(s, ",uid=%u", cifs_sb->mnt_uid); |
340481a3 JL |
394 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) |
395 | seq_printf(s, ",forceuid"); | |
4486d6ed JL |
396 | else |
397 | seq_printf(s, ",noforceuid"); | |
340481a3 | 398 | |
28f88810 | 399 | seq_printf(s, ",gid=%u", cifs_sb->mnt_gid); |
340481a3 JL |
400 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) |
401 | seq_printf(s, ",forcegid"); | |
4486d6ed JL |
402 | else |
403 | seq_printf(s, ",noforcegid"); | |
8616e0fc | 404 | |
61f98ffd | 405 | cifs_show_address(s, tcon->ses->server); |
1da177e4 | 406 | |
8616e0fc | 407 | if (!tcon->unix_ext) |
5206efd6 | 408 | seq_printf(s, ",file_mode=0%ho,dir_mode=0%ho", |
2b280fab SF |
409 | cifs_sb->mnt_file_mode, |
410 | cifs_sb->mnt_dir_mode); | |
8616e0fc JL |
411 | if (tcon->seal) |
412 | seq_printf(s, ",seal"); | |
413 | if (tcon->nocase) | |
414 | seq_printf(s, ",nocase"); | |
415 | if (tcon->retry) | |
416 | seq_printf(s, ",hard"); | |
d4ffff1f PS |
417 | if (tcon->unix_ext) |
418 | seq_printf(s, ",unix"); | |
419 | else | |
420 | seq_printf(s, ",nounix"); | |
8616e0fc JL |
421 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) |
422 | seq_printf(s, ",posixpaths"); | |
423 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) | |
424 | seq_printf(s, ",setuids"); | |
425 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) | |
426 | seq_printf(s, ",serverino"); | |
d4ffff1f PS |
427 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD) |
428 | seq_printf(s, ",rwpidforward"); | |
429 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) | |
430 | seq_printf(s, ",forcemand"); | |
8616e0fc JL |
431 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) |
432 | seq_printf(s, ",nouser_xattr"); | |
433 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR) | |
434 | seq_printf(s, ",mapchars"); | |
435 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) | |
436 | seq_printf(s, ",sfu"); | |
437 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
438 | seq_printf(s, ",nobrl"); | |
439 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) | |
440 | seq_printf(s, ",cifsacl"); | |
441 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) | |
442 | seq_printf(s, ",dynperm"); | |
34c80b1d | 443 | if (root->d_sb->s_flags & MS_POSIXACL) |
8616e0fc | 444 | seq_printf(s, ",acl"); |
736a3320 SM |
445 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) |
446 | seq_printf(s, ",mfsymlinks"); | |
476428f8 SJ |
447 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE) |
448 | seq_printf(s, ",fsc"); | |
71c424ba SF |
449 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC) |
450 | seq_printf(s, ",nostrictsync"); | |
451 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) | |
452 | seq_printf(s, ",noperm"); | |
3c7c87fd SP |
453 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPUID) |
454 | seq_printf(s, ",backupuid=%u", cifs_sb->mnt_backupuid); | |
455 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPGID) | |
456 | seq_printf(s, ",backupgid=%u", cifs_sb->mnt_backupgid); | |
8616e0fc | 457 | |
28f88810 SP |
458 | seq_printf(s, ",rsize=%u", cifs_sb->rsize); |
459 | seq_printf(s, ",wsize=%u", cifs_sb->wsize); | |
6d20e840 | 460 | /* convert actimeo and display it in seconds */ |
156d1790 | 461 | seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ); |
8616e0fc | 462 | |
1da177e4 LT |
463 | return 0; |
464 | } | |
465 | ||
42faad99 | 466 | static void cifs_umount_begin(struct super_block *sb) |
68058e75 | 467 | { |
42faad99 | 468 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
96daf2b0 | 469 | struct cifs_tcon *tcon; |
68058e75 | 470 | |
4523cc30 | 471 | if (cifs_sb == NULL) |
9e2e85f8 SF |
472 | return; |
473 | ||
0d424ad0 | 474 | tcon = cifs_sb_master_tcon(cifs_sb); |
f1987b44 | 475 | |
3f9bcca7 | 476 | spin_lock(&cifs_tcp_ses_lock); |
ad8034f1 SF |
477 | if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) { |
478 | /* we have other mounts to same share or we have | |
479 | already tried to force umount this and woken up | |
480 | all waiting network requests, nothing to do */ | |
3f9bcca7 | 481 | spin_unlock(&cifs_tcp_ses_lock); |
ad8034f1 SF |
482 | return; |
483 | } else if (tcon->tc_count == 1) | |
5e1253b5 | 484 | tcon->tidStatus = CifsExiting; |
3f9bcca7 | 485 | spin_unlock(&cifs_tcp_ses_lock); |
5e1253b5 | 486 | |
3a5ff61c | 487 | /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */ |
7b7abfe3 | 488 | /* cancel_notify_requests(tcon); */ |
50c2f753 | 489 | if (tcon->ses && tcon->ses->server) { |
b6b38f70 | 490 | cFYI(1, "wake up tasks now - umount begin not complete"); |
9e2e85f8 | 491 | wake_up_all(&tcon->ses->server->request_q); |
6ab16d24 SF |
492 | wake_up_all(&tcon->ses->server->response_q); |
493 | msleep(1); /* yield */ | |
494 | /* we have to kick the requests once more */ | |
495 | wake_up_all(&tcon->ses->server->response_q); | |
496 | msleep(1); | |
5e1253b5 | 497 | } |
68058e75 SF |
498 | |
499 | return; | |
500 | } | |
68058e75 | 501 | |
bf97d287 | 502 | #ifdef CONFIG_CIFS_STATS2 |
64132379 | 503 | static int cifs_show_stats(struct seq_file *s, struct dentry *root) |
bf97d287 SF |
504 | { |
505 | /* BB FIXME */ | |
506 | return 0; | |
507 | } | |
508 | #endif | |
509 | ||
1da177e4 LT |
510 | static int cifs_remount(struct super_block *sb, int *flags, char *data) |
511 | { | |
512 | *flags |= MS_NODIRATIME; | |
513 | return 0; | |
514 | } | |
515 | ||
45321ac5 | 516 | static int cifs_drop_inode(struct inode *inode) |
12420ac3 JL |
517 | { |
518 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
519 | ||
45321ac5 AV |
520 | /* no serverino => unconditional eviction */ |
521 | return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) || | |
522 | generic_drop_inode(inode); | |
12420ac3 JL |
523 | } |
524 | ||
ee9b6d61 | 525 | static const struct super_operations cifs_super_ops = { |
1da177e4 LT |
526 | .statfs = cifs_statfs, |
527 | .alloc_inode = cifs_alloc_inode, | |
528 | .destroy_inode = cifs_destroy_inode, | |
12420ac3 | 529 | .drop_inode = cifs_drop_inode, |
b57922d9 | 530 | .evict_inode = cifs_evict_inode, |
12420ac3 JL |
531 | /* .delete_inode = cifs_delete_inode, */ /* Do not need above |
532 | function unless later we add lazy close of inodes or unless the | |
50c2f753 SF |
533 | kernel forgets to call us with the same number of releases (closes) |
534 | as opens */ | |
1da177e4 | 535 | .show_options = cifs_show_options, |
7b7abfe3 | 536 | .umount_begin = cifs_umount_begin, |
1da177e4 | 537 | .remount_fs = cifs_remount, |
bf97d287 | 538 | #ifdef CONFIG_CIFS_STATS2 |
f46d3e11 | 539 | .show_stats = cifs_show_stats, |
bf97d287 | 540 | #endif |
1da177e4 LT |
541 | }; |
542 | ||
f87d39d9 SF |
543 | /* |
544 | * Get root dentry from superblock according to prefix path mount option. | |
545 | * Return dentry with refcount + 1 on success and NULL otherwise. | |
546 | */ | |
547 | static struct dentry * | |
548 | cifs_get_root(struct smb_vol *vol, struct super_block *sb) | |
549 | { | |
fec11dd9 | 550 | struct dentry *dentry; |
f87d39d9 | 551 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
fec11dd9 AV |
552 | char *full_path = NULL; |
553 | char *s, *p; | |
f87d39d9 SF |
554 | char sep; |
555 | ||
9224dfc2 PS |
556 | full_path = build_path_to_root(vol, cifs_sb, |
557 | cifs_sb_master_tcon(cifs_sb)); | |
f87d39d9 | 558 | if (full_path == NULL) |
9403c9c5 | 559 | return ERR_PTR(-ENOMEM); |
f87d39d9 SF |
560 | |
561 | cFYI(1, "Get root dentry for %s", full_path); | |
562 | ||
f87d39d9 | 563 | sep = CIFS_DIR_SEP(cifs_sb); |
fec11dd9 AV |
564 | dentry = dget(sb->s_root); |
565 | p = s = full_path; | |
566 | ||
567 | do { | |
568 | struct inode *dir = dentry->d_inode; | |
569 | struct dentry *child; | |
570 | ||
5b980b01 PS |
571 | if (!dir) { |
572 | dput(dentry); | |
573 | dentry = ERR_PTR(-ENOENT); | |
574 | break; | |
575 | } | |
576 | ||
fec11dd9 AV |
577 | /* skip separators */ |
578 | while (*s == sep) | |
579 | s++; | |
580 | if (!*s) | |
581 | break; | |
582 | p = s++; | |
583 | /* next separator */ | |
584 | while (*s && *s != sep) | |
585 | s++; | |
586 | ||
587 | mutex_lock(&dir->i_mutex); | |
588 | child = lookup_one_len(p, dentry, s - p); | |
589 | mutex_unlock(&dir->i_mutex); | |
590 | dput(dentry); | |
591 | dentry = child; | |
592 | } while (!IS_ERR(dentry)); | |
f87d39d9 | 593 | kfree(full_path); |
fec11dd9 | 594 | return dentry; |
f87d39d9 SF |
595 | } |
596 | ||
ee01a14d AV |
597 | static int cifs_set_super(struct super_block *sb, void *data) |
598 | { | |
599 | struct cifs_mnt_data *mnt_data = data; | |
600 | sb->s_fs_info = mnt_data->cifs_sb; | |
601 | return set_anon_super(sb, NULL); | |
602 | } | |
603 | ||
d753ed97 AV |
604 | static struct dentry * |
605 | cifs_do_mount(struct file_system_type *fs_type, | |
724d9f1c | 606 | int flags, const char *dev_name, void *data) |
1da177e4 LT |
607 | { |
608 | int rc; | |
db719222 | 609 | struct super_block *sb; |
724d9f1c PS |
610 | struct cifs_sb_info *cifs_sb; |
611 | struct smb_vol *volume_info; | |
25c7f41e | 612 | struct cifs_mnt_data mnt_data; |
724d9f1c | 613 | struct dentry *root; |
1da177e4 | 614 | |
b6b38f70 | 615 | cFYI(1, "Devname: %s flags: %d ", dev_name, flags); |
1da177e4 | 616 | |
04db79b0 JL |
617 | volume_info = cifs_get_volume_info((char *)data, dev_name); |
618 | if (IS_ERR(volume_info)) | |
619 | return ERR_CAST(volume_info); | |
724d9f1c PS |
620 | |
621 | cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL); | |
622 | if (cifs_sb == NULL) { | |
623 | root = ERR_PTR(-ENOMEM); | |
5c4f1ad7 | 624 | goto out_nls; |
724d9f1c PS |
625 | } |
626 | ||
5d3bc605 AV |
627 | cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL); |
628 | if (cifs_sb->mountdata == NULL) { | |
629 | root = ERR_PTR(-ENOMEM); | |
5c4f1ad7 | 630 | goto out_cifs_sb; |
5d3bc605 AV |
631 | } |
632 | ||
724d9f1c PS |
633 | cifs_setup_cifs_sb(volume_info, cifs_sb); |
634 | ||
97d1152a AV |
635 | rc = cifs_mount(cifs_sb, volume_info); |
636 | if (rc) { | |
637 | if (!(flags & MS_SILENT)) | |
638 | cERROR(1, "cifs_mount failed w/return code = %d", rc); | |
639 | root = ERR_PTR(rc); | |
5c4f1ad7 | 640 | goto out_mountdata; |
97d1152a AV |
641 | } |
642 | ||
25c7f41e PS |
643 | mnt_data.vol = volume_info; |
644 | mnt_data.cifs_sb = cifs_sb; | |
645 | mnt_data.flags = flags; | |
646 | ||
9249e17f DH |
647 | /* BB should we make this contingent on mount parm? */ |
648 | flags |= MS_NODIRATIME | MS_NOATIME; | |
649 | ||
650 | sb = sget(fs_type, cifs_match_super, cifs_set_super, flags, &mnt_data); | |
724d9f1c | 651 | if (IS_ERR(sb)) { |
724d9f1c | 652 | root = ERR_CAST(sb); |
97d1152a | 653 | cifs_umount(cifs_sb); |
d757d71b | 654 | goto out; |
724d9f1c | 655 | } |
1da177e4 | 656 | |
ee01a14d | 657 | if (sb->s_root) { |
25c7f41e | 658 | cFYI(1, "Use existing superblock"); |
97d1152a | 659 | cifs_umount(cifs_sb); |
5c4f1ad7 | 660 | } else { |
5c4f1ad7 AV |
661 | rc = cifs_read_super(sb); |
662 | if (rc) { | |
663 | root = ERR_PTR(rc); | |
664 | goto out_super; | |
665 | } | |
b2e5cd33 | 666 | |
5c4f1ad7 | 667 | sb->s_flags |= MS_ACTIVE; |
1da177e4 | 668 | } |
724d9f1c | 669 | |
f87d39d9 | 670 | root = cifs_get_root(volume_info, sb); |
9403c9c5 | 671 | if (IS_ERR(root)) |
f87d39d9 | 672 | goto out_super; |
25c7f41e | 673 | |
f87d39d9 | 674 | cFYI(1, "dentry root is: %p", root); |
641a58d6 | 675 | goto out; |
724d9f1c | 676 | |
641a58d6 | 677 | out_super: |
641a58d6 | 678 | deactivate_locked_super(sb); |
641a58d6 | 679 | out: |
f9e59bcb | 680 | cifs_cleanup_volume_info(volume_info); |
724d9f1c | 681 | return root; |
5c4f1ad7 AV |
682 | |
683 | out_mountdata: | |
684 | kfree(cifs_sb->mountdata); | |
685 | out_cifs_sb: | |
686 | kfree(cifs_sb); | |
687 | out_nls: | |
688 | unload_nls(volume_info->local_nls); | |
689 | goto out; | |
1da177e4 LT |
690 | } |
691 | ||
027445c3 BP |
692 | static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov, |
693 | unsigned long nr_segs, loff_t pos) | |
1da177e4 | 694 | { |
e6a00296 | 695 | struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode; |
1da177e4 | 696 | ssize_t written; |
72432ffc | 697 | int rc; |
1da177e4 | 698 | |
027445c3 | 699 | written = generic_file_aio_write(iocb, iov, nr_segs, pos); |
72432ffc PS |
700 | |
701 | if (CIFS_I(inode)->clientCanCacheAll) | |
702 | return written; | |
703 | ||
704 | rc = filemap_fdatawrite(inode->i_mapping); | |
705 | if (rc) | |
706 | cFYI(1, "cifs_file_aio_write: %d rc on %p inode", rc, inode); | |
707 | ||
1da177e4 LT |
708 | return written; |
709 | } | |
710 | ||
c32a0b68 SF |
711 | static loff_t cifs_llseek(struct file *file, loff_t offset, int origin) |
712 | { | |
06222e49 JB |
713 | /* |
714 | * origin == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate | |
715 | * the cached file length | |
716 | */ | |
48a5730e | 717 | if (origin != SEEK_SET && origin != SEEK_CUR) { |
6feb9891 PS |
718 | int rc; |
719 | struct inode *inode = file->f_path.dentry->d_inode; | |
720 | ||
721 | /* | |
722 | * We need to be sure that all dirty pages are written and the | |
723 | * server has the newest file length. | |
724 | */ | |
725 | if (!CIFS_I(inode)->clientCanCacheRead && inode->i_mapping && | |
726 | inode->i_mapping->nrpages != 0) { | |
727 | rc = filemap_fdatawait(inode->i_mapping); | |
156ecb2d SF |
728 | if (rc) { |
729 | mapping_set_error(inode->i_mapping, rc); | |
730 | return rc; | |
731 | } | |
6feb9891 PS |
732 | } |
733 | /* | |
734 | * Some applications poll for the file length in this strange | |
735 | * way so we must seek to end on non-oplocked files by | |
736 | * setting the revalidate time to zero. | |
737 | */ | |
738 | CIFS_I(inode)->time = 0; | |
739 | ||
740 | rc = cifs_revalidate_file_attr(file); | |
741 | if (rc < 0) | |
742 | return (loff_t)rc; | |
c32a0b68 | 743 | } |
ef3d0fd2 | 744 | return generic_file_llseek(file, offset, origin); |
c32a0b68 SF |
745 | } |
746 | ||
84210e91 SF |
747 | static int cifs_setlease(struct file *file, long arg, struct file_lock **lease) |
748 | { | |
b89f4321 AB |
749 | /* note that this is called by vfs setlease with lock_flocks held |
750 | to protect *lease from going away */ | |
84210e91 | 751 | struct inode *inode = file->f_path.dentry->d_inode; |
ba00ba64 | 752 | struct cifsFileInfo *cfile = file->private_data; |
84210e91 SF |
753 | |
754 | if (!(S_ISREG(inode->i_mode))) | |
755 | return -EINVAL; | |
756 | ||
757 | /* check if file is oplocked */ | |
758 | if (((arg == F_RDLCK) && | |
759 | (CIFS_I(inode)->clientCanCacheRead)) || | |
760 | ((arg == F_WRLCK) && | |
761 | (CIFS_I(inode)->clientCanCacheAll))) | |
762 | return generic_setlease(file, arg, lease); | |
13cfb733 JL |
763 | else if (tlink_tcon(cfile->tlink)->local_lease && |
764 | !CIFS_I(inode)->clientCanCacheRead) | |
84210e91 SF |
765 | /* If the server claims to support oplock on this |
766 | file, then we still need to check oplock even | |
767 | if the local_lease mount option is set, but there | |
768 | are servers which do not support oplock for which | |
769 | this mount option may be useful if the user | |
770 | knows that the file won't be changed on the server | |
771 | by anyone else */ | |
772 | return generic_setlease(file, arg, lease); | |
51ee4b84 | 773 | else |
84210e91 SF |
774 | return -EAGAIN; |
775 | } | |
84210e91 | 776 | |
e6ab1582 | 777 | struct file_system_type cifs_fs_type = { |
1da177e4 LT |
778 | .owner = THIS_MODULE, |
779 | .name = "cifs", | |
d753ed97 | 780 | .mount = cifs_do_mount, |
6d686175 | 781 | .kill_sb = cifs_kill_sb, |
1da177e4 LT |
782 | /* .fs_flags */ |
783 | }; | |
754661f1 | 784 | const struct inode_operations cifs_dir_inode_ops = { |
1da177e4 | 785 | .create = cifs_create, |
d2c12719 | 786 | .atomic_open = cifs_atomic_open, |
1da177e4 LT |
787 | .lookup = cifs_lookup, |
788 | .getattr = cifs_getattr, | |
789 | .unlink = cifs_unlink, | |
790 | .link = cifs_hardlink, | |
791 | .mkdir = cifs_mkdir, | |
792 | .rmdir = cifs_rmdir, | |
793 | .rename = cifs_rename, | |
794 | .permission = cifs_permission, | |
795 | /* revalidate:cifs_revalidate, */ | |
796 | .setattr = cifs_setattr, | |
797 | .symlink = cifs_symlink, | |
798 | .mknod = cifs_mknod, | |
799 | #ifdef CONFIG_CIFS_XATTR | |
800 | .setxattr = cifs_setxattr, | |
801 | .getxattr = cifs_getxattr, | |
802 | .listxattr = cifs_listxattr, | |
803 | .removexattr = cifs_removexattr, | |
804 | #endif | |
805 | }; | |
806 | ||
754661f1 | 807 | const struct inode_operations cifs_file_inode_ops = { |
1da177e4 LT |
808 | /* revalidate:cifs_revalidate, */ |
809 | .setattr = cifs_setattr, | |
810 | .getattr = cifs_getattr, /* do we need this anymore? */ | |
811 | .rename = cifs_rename, | |
812 | .permission = cifs_permission, | |
813 | #ifdef CONFIG_CIFS_XATTR | |
814 | .setxattr = cifs_setxattr, | |
815 | .getxattr = cifs_getxattr, | |
816 | .listxattr = cifs_listxattr, | |
817 | .removexattr = cifs_removexattr, | |
50c2f753 | 818 | #endif |
1da177e4 LT |
819 | }; |
820 | ||
754661f1 | 821 | const struct inode_operations cifs_symlink_inode_ops = { |
50c2f753 | 822 | .readlink = generic_readlink, |
1da177e4 LT |
823 | .follow_link = cifs_follow_link, |
824 | .put_link = cifs_put_link, | |
825 | .permission = cifs_permission, | |
826 | /* BB add the following two eventually */ | |
827 | /* revalidate: cifs_revalidate, | |
828 | setattr: cifs_notify_change, *//* BB do we need notify change */ | |
829 | #ifdef CONFIG_CIFS_XATTR | |
830 | .setxattr = cifs_setxattr, | |
831 | .getxattr = cifs_getxattr, | |
832 | .listxattr = cifs_listxattr, | |
833 | .removexattr = cifs_removexattr, | |
50c2f753 | 834 | #endif |
1da177e4 LT |
835 | }; |
836 | ||
4b6f5d20 | 837 | const struct file_operations cifs_file_ops = { |
87c89dd7 SF |
838 | .read = do_sync_read, |
839 | .write = do_sync_write, | |
87c89dd7 SF |
840 | .aio_read = generic_file_aio_read, |
841 | .aio_write = cifs_file_aio_write, | |
1da177e4 LT |
842 | .open = cifs_open, |
843 | .release = cifs_close, | |
844 | .lock = cifs_lock, | |
845 | .fsync = cifs_fsync, | |
846 | .flush = cifs_flush, | |
847 | .mmap = cifs_file_mmap, | |
5ffc4ef4 | 848 | .splice_read = generic_file_splice_read, |
c32a0b68 | 849 | .llseek = cifs_llseek, |
c67593a0 | 850 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 851 | .unlocked_ioctl = cifs_ioctl, |
c67593a0 | 852 | #endif /* CONFIG_CIFS_POSIX */ |
84210e91 | 853 | .setlease = cifs_setlease, |
1da177e4 LT |
854 | }; |
855 | ||
8be7e6ba PS |
856 | const struct file_operations cifs_file_strict_ops = { |
857 | .read = do_sync_read, | |
858 | .write = do_sync_write, | |
a70307ee | 859 | .aio_read = cifs_strict_readv, |
72432ffc | 860 | .aio_write = cifs_strict_writev, |
8be7e6ba PS |
861 | .open = cifs_open, |
862 | .release = cifs_close, | |
863 | .lock = cifs_lock, | |
864 | .fsync = cifs_strict_fsync, | |
865 | .flush = cifs_flush, | |
7a6a19b1 | 866 | .mmap = cifs_file_strict_mmap, |
8be7e6ba PS |
867 | .splice_read = generic_file_splice_read, |
868 | .llseek = cifs_llseek, | |
869 | #ifdef CONFIG_CIFS_POSIX | |
870 | .unlocked_ioctl = cifs_ioctl, | |
871 | #endif /* CONFIG_CIFS_POSIX */ | |
872 | .setlease = cifs_setlease, | |
873 | }; | |
874 | ||
4b6f5d20 | 875 | const struct file_operations cifs_file_direct_ops = { |
0b81c1c4 PS |
876 | /* BB reevaluate whether they can be done with directio, no cache */ |
877 | .read = do_sync_read, | |
878 | .write = do_sync_write, | |
879 | .aio_read = cifs_user_readv, | |
880 | .aio_write = cifs_user_writev, | |
1da177e4 LT |
881 | .open = cifs_open, |
882 | .release = cifs_close, | |
883 | .lock = cifs_lock, | |
884 | .fsync = cifs_fsync, | |
885 | .flush = cifs_flush, | |
a994b8fa | 886 | .mmap = cifs_file_mmap, |
5ffc4ef4 | 887 | .splice_read = generic_file_splice_read, |
c67593a0 | 888 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 889 | .unlocked_ioctl = cifs_ioctl, |
c67593a0 | 890 | #endif /* CONFIG_CIFS_POSIX */ |
c32a0b68 | 891 | .llseek = cifs_llseek, |
84210e91 | 892 | .setlease = cifs_setlease, |
1da177e4 | 893 | }; |
8be7e6ba | 894 | |
4b6f5d20 | 895 | const struct file_operations cifs_file_nobrl_ops = { |
87c89dd7 SF |
896 | .read = do_sync_read, |
897 | .write = do_sync_write, | |
87c89dd7 SF |
898 | .aio_read = generic_file_aio_read, |
899 | .aio_write = cifs_file_aio_write, | |
900 | .open = cifs_open, | |
901 | .release = cifs_close, | |
902 | .fsync = cifs_fsync, | |
903 | .flush = cifs_flush, | |
904 | .mmap = cifs_file_mmap, | |
5ffc4ef4 | 905 | .splice_read = generic_file_splice_read, |
c32a0b68 | 906 | .llseek = cifs_llseek, |
8b94bcb9 | 907 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 908 | .unlocked_ioctl = cifs_ioctl, |
8b94bcb9 | 909 | #endif /* CONFIG_CIFS_POSIX */ |
84210e91 | 910 | .setlease = cifs_setlease, |
8b94bcb9 SF |
911 | }; |
912 | ||
8be7e6ba PS |
913 | const struct file_operations cifs_file_strict_nobrl_ops = { |
914 | .read = do_sync_read, | |
915 | .write = do_sync_write, | |
a70307ee | 916 | .aio_read = cifs_strict_readv, |
72432ffc | 917 | .aio_write = cifs_strict_writev, |
8be7e6ba PS |
918 | .open = cifs_open, |
919 | .release = cifs_close, | |
920 | .fsync = cifs_strict_fsync, | |
921 | .flush = cifs_flush, | |
7a6a19b1 | 922 | .mmap = cifs_file_strict_mmap, |
8be7e6ba PS |
923 | .splice_read = generic_file_splice_read, |
924 | .llseek = cifs_llseek, | |
925 | #ifdef CONFIG_CIFS_POSIX | |
926 | .unlocked_ioctl = cifs_ioctl, | |
927 | #endif /* CONFIG_CIFS_POSIX */ | |
928 | .setlease = cifs_setlease, | |
929 | }; | |
930 | ||
4b6f5d20 | 931 | const struct file_operations cifs_file_direct_nobrl_ops = { |
0b81c1c4 PS |
932 | /* BB reevaluate whether they can be done with directio, no cache */ |
933 | .read = do_sync_read, | |
934 | .write = do_sync_write, | |
935 | .aio_read = cifs_user_readv, | |
936 | .aio_write = cifs_user_writev, | |
87c89dd7 SF |
937 | .open = cifs_open, |
938 | .release = cifs_close, | |
939 | .fsync = cifs_fsync, | |
940 | .flush = cifs_flush, | |
810627a0 | 941 | .mmap = cifs_file_mmap, |
5ffc4ef4 | 942 | .splice_read = generic_file_splice_read, |
8b94bcb9 | 943 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 944 | .unlocked_ioctl = cifs_ioctl, |
8b94bcb9 | 945 | #endif /* CONFIG_CIFS_POSIX */ |
c32a0b68 | 946 | .llseek = cifs_llseek, |
84210e91 | 947 | .setlease = cifs_setlease, |
8b94bcb9 | 948 | }; |
1da177e4 | 949 | |
4b6f5d20 | 950 | const struct file_operations cifs_dir_ops = { |
1da177e4 LT |
951 | .readdir = cifs_readdir, |
952 | .release = cifs_closedir, | |
953 | .read = generic_read_dir, | |
f9ddcca4 | 954 | .unlocked_ioctl = cifs_ioctl, |
3222a3e5 | 955 | .llseek = generic_file_llseek, |
1da177e4 LT |
956 | }; |
957 | ||
958 | static void | |
51cc5068 | 959 | cifs_init_once(void *inode) |
1da177e4 LT |
960 | { |
961 | struct cifsInodeInfo *cifsi = inode; | |
962 | ||
a35afb83 | 963 | inode_init_once(&cifsi->vfs_inode); |
d59dad2b | 964 | mutex_init(&cifsi->lock_mutex); |
1da177e4 LT |
965 | } |
966 | ||
967 | static int | |
968 | cifs_init_inodecache(void) | |
969 | { | |
970 | cifs_inode_cachep = kmem_cache_create("cifs_inode_cache", | |
26f57364 | 971 | sizeof(struct cifsInodeInfo), |
fffb60f9 PJ |
972 | 0, (SLAB_RECLAIM_ACCOUNT| |
973 | SLAB_MEM_SPREAD), | |
20c2df83 | 974 | cifs_init_once); |
1da177e4 LT |
975 | if (cifs_inode_cachep == NULL) |
976 | return -ENOMEM; | |
977 | ||
978 | return 0; | |
979 | } | |
980 | ||
981 | static void | |
982 | cifs_destroy_inodecache(void) | |
983 | { | |
1a1d92c1 | 984 | kmem_cache_destroy(cifs_inode_cachep); |
1da177e4 LT |
985 | } |
986 | ||
987 | static int | |
988 | cifs_init_request_bufs(void) | |
989 | { | |
3792c173 PS |
990 | size_t max_hdr_size = MAX_CIFS_HDR_SIZE; |
991 | #ifdef CONFIG_CIFS_SMB2 | |
992 | /* | |
993 | * SMB2 maximum header size is bigger than CIFS one - no problems to | |
994 | * allocate some more bytes for CIFS. | |
995 | */ | |
996 | max_hdr_size = MAX_SMB2_HDR_SIZE; | |
997 | #endif | |
4523cc30 | 998 | if (CIFSMaxBufSize < 8192) { |
1da177e4 LT |
999 | /* Buffer size can not be smaller than 2 * PATH_MAX since maximum |
1000 | Unicode path name has to fit in any SMB/CIFS path based frames */ | |
1001 | CIFSMaxBufSize = 8192; | |
1002 | } else if (CIFSMaxBufSize > 1024*127) { | |
1003 | CIFSMaxBufSize = 1024 * 127; | |
1004 | } else { | |
1005 | CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/ | |
1006 | } | |
b6b38f70 | 1007 | /* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */ |
1da177e4 | 1008 | cifs_req_cachep = kmem_cache_create("cifs_request", |
3792c173 | 1009 | CIFSMaxBufSize + max_hdr_size, 0, |
20c2df83 | 1010 | SLAB_HWCACHE_ALIGN, NULL); |
1da177e4 LT |
1011 | if (cifs_req_cachep == NULL) |
1012 | return -ENOMEM; | |
1013 | ||
4523cc30 | 1014 | if (cifs_min_rcv < 1) |
1da177e4 LT |
1015 | cifs_min_rcv = 1; |
1016 | else if (cifs_min_rcv > 64) { | |
1017 | cifs_min_rcv = 64; | |
b6b38f70 | 1018 | cERROR(1, "cifs_min_rcv set to maximum (64)"); |
1da177e4 LT |
1019 | } |
1020 | ||
93d2341c MD |
1021 | cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv, |
1022 | cifs_req_cachep); | |
1da177e4 | 1023 | |
4523cc30 | 1024 | if (cifs_req_poolp == NULL) { |
1da177e4 LT |
1025 | kmem_cache_destroy(cifs_req_cachep); |
1026 | return -ENOMEM; | |
1027 | } | |
ec637e3f | 1028 | /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and |
1da177e4 LT |
1029 | almost all handle based requests (but not write response, nor is it |
1030 | sufficient for path based requests). A smaller size would have | |
50c2f753 | 1031 | been more efficient (compacting multiple slab items on one 4k page) |
1da177e4 LT |
1032 | for the case in which debug was on, but this larger size allows |
1033 | more SMBs to use small buffer alloc and is still much more | |
6dc0f87e | 1034 | efficient to alloc 1 per page off the slab compared to 17K (5page) |
1da177e4 LT |
1035 | alloc of large cifs buffers even when page debugging is on */ |
1036 | cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq", | |
6dc0f87e | 1037 | MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN, |
20c2df83 | 1038 | NULL); |
1da177e4 LT |
1039 | if (cifs_sm_req_cachep == NULL) { |
1040 | mempool_destroy(cifs_req_poolp); | |
1041 | kmem_cache_destroy(cifs_req_cachep); | |
6dc0f87e | 1042 | return -ENOMEM; |
1da177e4 LT |
1043 | } |
1044 | ||
4523cc30 | 1045 | if (cifs_min_small < 2) |
1da177e4 LT |
1046 | cifs_min_small = 2; |
1047 | else if (cifs_min_small > 256) { | |
1048 | cifs_min_small = 256; | |
b6b38f70 | 1049 | cFYI(1, "cifs_min_small set to maximum (256)"); |
1da177e4 LT |
1050 | } |
1051 | ||
93d2341c MD |
1052 | cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small, |
1053 | cifs_sm_req_cachep); | |
1da177e4 | 1054 | |
4523cc30 | 1055 | if (cifs_sm_req_poolp == NULL) { |
1da177e4 LT |
1056 | mempool_destroy(cifs_req_poolp); |
1057 | kmem_cache_destroy(cifs_req_cachep); | |
1058 | kmem_cache_destroy(cifs_sm_req_cachep); | |
1059 | return -ENOMEM; | |
1060 | } | |
1061 | ||
1062 | return 0; | |
1063 | } | |
1064 | ||
1065 | static void | |
1066 | cifs_destroy_request_bufs(void) | |
1067 | { | |
1068 | mempool_destroy(cifs_req_poolp); | |
1a1d92c1 | 1069 | kmem_cache_destroy(cifs_req_cachep); |
1da177e4 | 1070 | mempool_destroy(cifs_sm_req_poolp); |
1a1d92c1 | 1071 | kmem_cache_destroy(cifs_sm_req_cachep); |
1da177e4 LT |
1072 | } |
1073 | ||
1074 | static int | |
1075 | cifs_init_mids(void) | |
1076 | { | |
1077 | cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids", | |
26f57364 SF |
1078 | sizeof(struct mid_q_entry), 0, |
1079 | SLAB_HWCACHE_ALIGN, NULL); | |
1da177e4 LT |
1080 | if (cifs_mid_cachep == NULL) |
1081 | return -ENOMEM; | |
1082 | ||
93d2341c MD |
1083 | /* 3 is a reasonable minimum number of simultaneous operations */ |
1084 | cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep); | |
4523cc30 | 1085 | if (cifs_mid_poolp == NULL) { |
1da177e4 LT |
1086 | kmem_cache_destroy(cifs_mid_cachep); |
1087 | return -ENOMEM; | |
1088 | } | |
1089 | ||
1da177e4 LT |
1090 | return 0; |
1091 | } | |
1092 | ||
1093 | static void | |
1094 | cifs_destroy_mids(void) | |
1095 | { | |
1096 | mempool_destroy(cifs_mid_poolp); | |
1a1d92c1 | 1097 | kmem_cache_destroy(cifs_mid_cachep); |
1da177e4 LT |
1098 | } |
1099 | ||
1da177e4 LT |
1100 | static int __init |
1101 | init_cifs(void) | |
1102 | { | |
1103 | int rc = 0; | |
1da177e4 | 1104 | cifs_proc_init(); |
e7ddee90 | 1105 | INIT_LIST_HEAD(&cifs_tcp_ses_list); |
0eff0e26 | 1106 | #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */ |
4ca9c190 SF |
1107 | INIT_LIST_HEAD(&GlobalDnotifyReqList); |
1108 | INIT_LIST_HEAD(&GlobalDnotifyRsp_Q); | |
0eff0e26 | 1109 | #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */ |
1da177e4 LT |
1110 | /* |
1111 | * Initialize Global counters | |
1112 | */ | |
1113 | atomic_set(&sesInfoAllocCount, 0); | |
1114 | atomic_set(&tconInfoAllocCount, 0); | |
6dc0f87e | 1115 | atomic_set(&tcpSesAllocCount, 0); |
1da177e4 LT |
1116 | atomic_set(&tcpSesReconnectCount, 0); |
1117 | atomic_set(&tconInfoReconnectCount, 0); | |
1118 | ||
1119 | atomic_set(&bufAllocCount, 0); | |
4498eed5 SF |
1120 | atomic_set(&smBufAllocCount, 0); |
1121 | #ifdef CONFIG_CIFS_STATS2 | |
1122 | atomic_set(&totBufAllocCount, 0); | |
1123 | atomic_set(&totSmBufAllocCount, 0); | |
1124 | #endif /* CONFIG_CIFS_STATS2 */ | |
1125 | ||
1da177e4 LT |
1126 | atomic_set(&midCount, 0); |
1127 | GlobalCurrentXid = 0; | |
1128 | GlobalTotalActiveXid = 0; | |
1129 | GlobalMaxActiveXid = 0; | |
3f9bcca7 | 1130 | spin_lock_init(&cifs_tcp_ses_lock); |
4477288a | 1131 | spin_lock_init(&cifs_file_list_lock); |
1da177e4 LT |
1132 | spin_lock_init(&GlobalMid_Lock); |
1133 | ||
4523cc30 | 1134 | if (cifs_max_pending < 2) { |
1da177e4 | 1135 | cifs_max_pending = 2; |
b6b38f70 | 1136 | cFYI(1, "cifs_max_pending set to min of 2"); |
10b9b98e PS |
1137 | } else if (cifs_max_pending > CIFS_MAX_REQ) { |
1138 | cifs_max_pending = CIFS_MAX_REQ; | |
1139 | cFYI(1, "cifs_max_pending set to max of %u", CIFS_MAX_REQ); | |
1da177e4 LT |
1140 | } |
1141 | ||
da472fc8 JL |
1142 | cifsiod_wq = alloc_workqueue("cifsiod", WQ_FREEZABLE|WQ_MEM_RECLAIM, 0); |
1143 | if (!cifsiod_wq) { | |
1144 | rc = -ENOMEM; | |
1145 | goto out_clean_proc; | |
1146 | } | |
1147 | ||
f579cf3c SJ |
1148 | rc = cifs_fscache_register(); |
1149 | if (rc) | |
da472fc8 | 1150 | goto out_destroy_wq; |
f579cf3c | 1151 | |
1da177e4 | 1152 | rc = cifs_init_inodecache(); |
45af7a0f | 1153 | if (rc) |
d3bf5221 | 1154 | goto out_unreg_fscache; |
45af7a0f SF |
1155 | |
1156 | rc = cifs_init_mids(); | |
1157 | if (rc) | |
1158 | goto out_destroy_inodecache; | |
1159 | ||
1160 | rc = cifs_init_request_bufs(); | |
1161 | if (rc) | |
1162 | goto out_destroy_mids; | |
1163 | ||
84a15b93 JL |
1164 | #ifdef CONFIG_CIFS_UPCALL |
1165 | rc = register_key_type(&cifs_spnego_key_type); | |
1166 | if (rc) | |
4d79dba0 SP |
1167 | goto out_destroy_request_bufs; |
1168 | #endif /* CONFIG_CIFS_UPCALL */ | |
1169 | ||
1170 | #ifdef CONFIG_CIFS_ACL | |
1171 | rc = init_cifs_idmap(); | |
1172 | if (rc) | |
c4aca0c0 | 1173 | goto out_register_key_type; |
4d79dba0 SP |
1174 | #endif /* CONFIG_CIFS_ACL */ |
1175 | ||
1176 | rc = register_filesystem(&cifs_fs_type); | |
1177 | if (rc) | |
c4aca0c0 | 1178 | goto out_init_cifs_idmap; |
45af7a0f | 1179 | |
45af7a0f SF |
1180 | return 0; |
1181 | ||
c4aca0c0 | 1182 | out_init_cifs_idmap: |
4d79dba0 SP |
1183 | #ifdef CONFIG_CIFS_ACL |
1184 | exit_cifs_idmap(); | |
c4aca0c0 | 1185 | out_register_key_type: |
4d79dba0 | 1186 | #endif |
84a15b93 | 1187 | #ifdef CONFIG_CIFS_UPCALL |
4d79dba0 | 1188 | unregister_key_type(&cifs_spnego_key_type); |
c4aca0c0 | 1189 | out_destroy_request_bufs: |
1fc7995d | 1190 | #endif |
45af7a0f | 1191 | cifs_destroy_request_bufs(); |
d3bf5221 | 1192 | out_destroy_mids: |
45af7a0f | 1193 | cifs_destroy_mids(); |
d3bf5221 | 1194 | out_destroy_inodecache: |
45af7a0f | 1195 | cifs_destroy_inodecache(); |
d3bf5221 | 1196 | out_unreg_fscache: |
f579cf3c | 1197 | cifs_fscache_unregister(); |
da472fc8 JL |
1198 | out_destroy_wq: |
1199 | destroy_workqueue(cifsiod_wq); | |
d3bf5221 SF |
1200 | out_clean_proc: |
1201 | cifs_proc_clean(); | |
1da177e4 LT |
1202 | return rc; |
1203 | } | |
1204 | ||
1205 | static void __exit | |
1206 | exit_cifs(void) | |
1207 | { | |
b6b38f70 | 1208 | cFYI(DBG2, "exit_cifs"); |
3dd93306 | 1209 | unregister_filesystem(&cifs_fs_type); |
78d31a3a | 1210 | cifs_dfs_release_automount_timer(); |
4d79dba0 SP |
1211 | #ifdef CONFIG_CIFS_ACL |
1212 | cifs_destroy_idmaptrees(); | |
1213 | exit_cifs_idmap(); | |
1214 | #endif | |
84a15b93 JL |
1215 | #ifdef CONFIG_CIFS_UPCALL |
1216 | unregister_key_type(&cifs_spnego_key_type); | |
1da177e4 | 1217 | #endif |
1da177e4 | 1218 | cifs_destroy_request_bufs(); |
3dd93306 JL |
1219 | cifs_destroy_mids(); |
1220 | cifs_destroy_inodecache(); | |
1221 | cifs_fscache_unregister(); | |
da472fc8 | 1222 | destroy_workqueue(cifsiod_wq); |
3dd93306 | 1223 | cifs_proc_clean(); |
1da177e4 LT |
1224 | } |
1225 | ||
1226 | MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>"); | |
6dc0f87e | 1227 | MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */ |
1da177e4 | 1228 | MODULE_DESCRIPTION |
63135e08 SF |
1229 | ("VFS to access servers complying with the SNIA CIFS Specification " |
1230 | "e.g. Samba and Windows"); | |
1da177e4 LT |
1231 | MODULE_VERSION(CIFS_VERSION); |
1232 | module_init(init_cifs) | |
1233 | module_exit(exit_cifs) |