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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * fs/cifs/cifsfs.c | |
3 | * | |
2b280fab | 4 | * Copyright (C) International Business Machines Corp., 2002,2008 |
1da177e4 LT |
5 | * Author(s): Steve French (sfrench@us.ibm.com) |
6 | * | |
7 | * Common Internet FileSystem (CIFS) client | |
8 | * | |
9 | * This library is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU Lesser General Public License as published | |
11 | * by the Free Software Foundation; either version 2.1 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This library is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
17 | * the GNU Lesser General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU Lesser General Public License | |
20 | * along with this library; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
22 | */ | |
23 | ||
24 | /* Note that BB means BUGBUG (ie something to fix eventually) */ | |
25 | ||
26 | #include <linux/module.h> | |
27 | #include <linux/fs.h> | |
28 | #include <linux/mount.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/init.h> | |
31 | #include <linux/list.h> | |
32 | #include <linux/seq_file.h> | |
33 | #include <linux/vfs.h> | |
34 | #include <linux/mempool.h> | |
6ab16d24 | 35 | #include <linux/delay.h> |
45af7a0f | 36 | #include <linux/kthread.h> |
7dfb7103 | 37 | #include <linux/freezer.h> |
3eb9a889 | 38 | #include <net/ipv6.h> |
1da177e4 LT |
39 | #include "cifsfs.h" |
40 | #include "cifspdu.h" | |
41 | #define DECLARE_GLOBALS_HERE | |
42 | #include "cifsglob.h" | |
43 | #include "cifsproto.h" | |
44 | #include "cifs_debug.h" | |
45 | #include "cifs_fs_sb.h" | |
46 | #include <linux/mm.h> | |
84a15b93 | 47 | #include <linux/key-type.h> |
e545937a | 48 | #include "cifs_spnego.h" |
f579cf3c | 49 | #include "fscache.h" |
1da177e4 LT |
50 | #define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */ |
51 | ||
1da177e4 LT |
52 | int cifsFYI = 0; |
53 | int cifsERROR = 1; | |
54 | int traceSMB = 0; | |
55 | unsigned int oplockEnabled = 1; | |
1da177e4 LT |
56 | unsigned int linuxExtEnabled = 1; |
57 | unsigned int lookupCacheEnabled = 1; | |
58 | unsigned int multiuser_mount = 0; | |
04912d6a | 59 | unsigned int global_secflags = CIFSSEC_DEF; |
3979877e | 60 | /* unsigned int ntlmv2_support = 0; */ |
1da177e4 | 61 | unsigned int sign_CIFS_PDUs = 1; |
ee9b6d61 | 62 | static const struct super_operations cifs_super_ops; |
1da177e4 LT |
63 | unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE; |
64 | module_param(CIFSMaxBufSize, int, 0); | |
63135e08 SF |
65 | MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). " |
66 | "Default: 16384 Range: 8192 to 130048"); | |
1da177e4 LT |
67 | unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL; |
68 | module_param(cifs_min_rcv, int, 0); | |
63135e08 SF |
69 | MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: " |
70 | "1 to 64"); | |
1da177e4 LT |
71 | unsigned int cifs_min_small = 30; |
72 | module_param(cifs_min_small, int, 0); | |
63135e08 SF |
73 | MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 " |
74 | "Range: 2 to 256"); | |
1da177e4 LT |
75 | unsigned int cifs_max_pending = CIFS_MAX_REQ; |
76 | module_param(cifs_max_pending, int, 0); | |
63135e08 SF |
77 | MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. " |
78 | "Default: 50 Range: 2 to 256"); | |
fda35943 SF |
79 | unsigned short echo_retries = 5; |
80 | module_param(echo_retries, ushort, 0644); | |
81 | MODULE_PARM_DESC(echo_retries, "Number of echo attempts before giving up and " | |
82 | "reconnecting server. Default: 5. 0 means " | |
83 | "never reconnect."); | |
1da177e4 LT |
84 | extern mempool_t *cifs_sm_req_poolp; |
85 | extern mempool_t *cifs_req_poolp; | |
86 | extern mempool_t *cifs_mid_poolp; | |
87 | ||
d7c86ff8 JL |
88 | void |
89 | cifs_sb_active(struct super_block *sb) | |
90 | { | |
91 | struct cifs_sb_info *server = CIFS_SB(sb); | |
92 | ||
93 | if (atomic_inc_return(&server->active) == 1) | |
94 | atomic_inc(&sb->s_active); | |
95 | } | |
96 | ||
97 | void | |
98 | cifs_sb_deactive(struct super_block *sb) | |
99 | { | |
100 | struct cifs_sb_info *server = CIFS_SB(sb); | |
101 | ||
102 | if (atomic_dec_and_test(&server->active)) | |
103 | deactivate_super(sb); | |
104 | } | |
105 | ||
1da177e4 LT |
106 | static int |
107 | cifs_read_super(struct super_block *sb, void *data, | |
108 | const char *devname, int silent) | |
109 | { | |
110 | struct inode *inode; | |
111 | struct cifs_sb_info *cifs_sb; | |
112 | int rc = 0; | |
50c2f753 | 113 | |
1b2b2126 SF |
114 | /* BB should we make this contingent on mount parm? */ |
115 | sb->s_flags |= MS_NODIRATIME | MS_NOATIME; | |
790fe579 | 116 | sb->s_fs_info = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL); |
1da177e4 | 117 | cifs_sb = CIFS_SB(sb); |
4523cc30 | 118 | if (cifs_sb == NULL) |
1da177e4 | 119 | return -ENOMEM; |
1da177e4 | 120 | |
0dd12c21 | 121 | spin_lock_init(&cifs_sb->tlink_tree_lock); |
b647c35f | 122 | cifs_sb->tlink_tree = RB_ROOT; |
0dd12c21 | 123 | |
8044f7f4 JA |
124 | rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY); |
125 | if (rc) { | |
126 | kfree(cifs_sb); | |
127 | return rc; | |
128 | } | |
2b6c26a0 | 129 | cifs_sb->bdi.ra_pages = default_backing_dev_info.ra_pages; |
8044f7f4 | 130 | |
e6ab1582 IM |
131 | #ifdef CONFIG_CIFS_DFS_UPCALL |
132 | /* copy mount params to sb for use in submounts */ | |
133 | /* BB: should we move this after the mount so we | |
134 | * do not have to do the copy on failed mounts? | |
135 | * BB: May be it is better to do simple copy before | |
136 | * complex operation (mount), and in case of fail | |
137 | * just exit instead of doing mount and attempting | |
138 | * undo it if this copy fails?*/ | |
79ee9a8b SF |
139 | if (data) { |
140 | int len = strlen(data); | |
141 | cifs_sb->mountdata = kzalloc(len + 1, GFP_KERNEL); | |
142 | if (cifs_sb->mountdata == NULL) { | |
8044f7f4 | 143 | bdi_destroy(&cifs_sb->bdi); |
79ee9a8b SF |
144 | kfree(sb->s_fs_info); |
145 | sb->s_fs_info = NULL; | |
146 | return -ENOMEM; | |
147 | } | |
148 | strncpy(cifs_sb->mountdata, data, len + 1); | |
149 | cifs_sb->mountdata[len] = '\0'; | |
e6ab1582 | 150 | } |
e6ab1582 IM |
151 | #endif |
152 | ||
1da177e4 LT |
153 | rc = cifs_mount(sb, cifs_sb, data, devname); |
154 | ||
155 | if (rc) { | |
156 | if (!silent) | |
b6b38f70 | 157 | cERROR(1, "cifs_mount failed w/return code = %d", rc); |
1da177e4 LT |
158 | goto out_mount_failed; |
159 | } | |
160 | ||
161 | sb->s_magic = CIFS_MAGIC_NUMBER; | |
162 | sb->s_op = &cifs_super_ops; | |
8044f7f4 | 163 | sb->s_bdi = &cifs_sb->bdi; |
1da177e4 LT |
164 | sb->s_blocksize = CIFS_MAX_MSGSIZE; |
165 | sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */ | |
9b6763e0 | 166 | inode = cifs_root_iget(sb); |
1da177e4 | 167 | |
ce634ab2 DH |
168 | if (IS_ERR(inode)) { |
169 | rc = PTR_ERR(inode); | |
170 | inode = NULL; | |
1da177e4 LT |
171 | goto out_no_root; |
172 | } | |
173 | ||
174 | sb->s_root = d_alloc_root(inode); | |
175 | ||
176 | if (!sb->s_root) { | |
177 | rc = -ENOMEM; | |
178 | goto out_no_root; | |
179 | } | |
50c2f753 | 180 | |
1c929cfe AV |
181 | /* do that *after* d_alloc_root() - we want NULL ->d_op for root here */ |
182 | if (cifs_sb_master_tcon(cifs_sb)->nocase) | |
183 | sb->s_d_op = &cifs_ci_dentry_ops; | |
184 | else | |
185 | sb->s_d_op = &cifs_dentry_ops; | |
186 | ||
25720873 | 187 | #ifdef CIFS_NFSD_EXPORT |
7521a3c5 | 188 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
b6b38f70 | 189 | cFYI(1, "export ops supported"); |
7521a3c5 SF |
190 | sb->s_export_op = &cifs_export_ops; |
191 | } | |
25720873 | 192 | #endif /* CIFS_NFSD_EXPORT */ |
1da177e4 LT |
193 | |
194 | return 0; | |
195 | ||
196 | out_no_root: | |
b6b38f70 | 197 | cERROR(1, "cifs_read_super: get root inode failed"); |
1da177e4 LT |
198 | if (inode) |
199 | iput(inode); | |
54b4602d | 200 | |
2c731afb | 201 | cifs_umount(sb, cifs_sb); |
1da177e4 LT |
202 | |
203 | out_mount_failed: | |
4523cc30 | 204 | if (cifs_sb) { |
e6ab1582 IM |
205 | #ifdef CONFIG_CIFS_DFS_UPCALL |
206 | if (cifs_sb->mountdata) { | |
207 | kfree(cifs_sb->mountdata); | |
208 | cifs_sb->mountdata = NULL; | |
209 | } | |
210 | #endif | |
6d729e44 | 211 | unload_nls(cifs_sb->local_nls); |
8044f7f4 | 212 | bdi_destroy(&cifs_sb->bdi); |
1da177e4 LT |
213 | kfree(cifs_sb); |
214 | } | |
215 | return rc; | |
216 | } | |
217 | ||
218 | static void | |
219 | cifs_put_super(struct super_block *sb) | |
220 | { | |
221 | int rc = 0; | |
222 | struct cifs_sb_info *cifs_sb; | |
223 | ||
b6b38f70 | 224 | cFYI(1, "In cifs_put_super"); |
1da177e4 | 225 | cifs_sb = CIFS_SB(sb); |
4523cc30 | 226 | if (cifs_sb == NULL) { |
b6b38f70 | 227 | cFYI(1, "Empty cifs superblock info passed to unmount"); |
1da177e4 LT |
228 | return; |
229 | } | |
6cfd0148 | 230 | |
790fe579 | 231 | rc = cifs_umount(sb, cifs_sb); |
ad7a2926 | 232 | if (rc) |
b6b38f70 | 233 | cERROR(1, "cifs_umount failed with return code %d", rc); |
e6ab1582 IM |
234 | #ifdef CONFIG_CIFS_DFS_UPCALL |
235 | if (cifs_sb->mountdata) { | |
236 | kfree(cifs_sb->mountdata); | |
237 | cifs_sb->mountdata = NULL; | |
238 | } | |
239 | #endif | |
240 | ||
1da177e4 | 241 | unload_nls(cifs_sb->local_nls); |
8044f7f4 | 242 | bdi_destroy(&cifs_sb->bdi); |
1da177e4 | 243 | kfree(cifs_sb); |
1da177e4 LT |
244 | } |
245 | ||
246 | static int | |
726c3342 | 247 | cifs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 248 | { |
726c3342 | 249 | struct super_block *sb = dentry->d_sb; |
39da9847 | 250 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
0d424ad0 | 251 | struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb); |
c81156dd | 252 | int rc = -EOPNOTSUPP; |
39da9847 | 253 | int xid; |
1da177e4 LT |
254 | |
255 | xid = GetXid(); | |
256 | ||
1da177e4 LT |
257 | buf->f_type = CIFS_MAGIC_NUMBER; |
258 | ||
39da9847 SF |
259 | /* |
260 | * PATH_MAX may be too long - it would presumably be total path, | |
261 | * but note that some servers (includinng Samba 3) have a shorter | |
262 | * maximum path. | |
263 | * | |
264 | * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO. | |
265 | */ | |
266 | buf->f_namelen = PATH_MAX; | |
1da177e4 LT |
267 | buf->f_files = 0; /* undefined */ |
268 | buf->f_ffree = 0; /* unlimited */ | |
269 | ||
39da9847 SF |
270 | /* |
271 | * We could add a second check for a QFS Unix capability bit | |
272 | */ | |
273 | if ((tcon->ses->capabilities & CAP_UNIX) && | |
274 | (CIFS_POSIX_EXTENSIONS & le64_to_cpu(tcon->fsUnixInfo.Capability))) | |
275 | rc = CIFSSMBQFSPosixInfo(xid, tcon, buf); | |
276 | ||
277 | /* | |
278 | * Only need to call the old QFSInfo if failed on newer one, | |
279 | * e.g. by OS/2. | |
280 | **/ | |
281 | if (rc && (tcon->ses->capabilities & CAP_NT_SMBS)) | |
282 | rc = CIFSSMBQFSInfo(xid, tcon, buf); | |
283 | ||
284 | /* | |
285 | * Some old Windows servers also do not support level 103, retry with | |
286 | * older level one if old server failed the previous call or we | |
287 | * bypassed it because we detected that this was an older LANMAN sess | |
288 | */ | |
4523cc30 | 289 | if (rc) |
39da9847 SF |
290 | rc = SMBOldQFSInfo(xid, tcon, buf); |
291 | ||
1da177e4 | 292 | FreeXid(xid); |
39da9847 | 293 | return 0; |
1da177e4 LT |
294 | } |
295 | ||
b74c79e9 | 296 | static int cifs_permission(struct inode *inode, int mask, unsigned int flags) |
1da177e4 LT |
297 | { |
298 | struct cifs_sb_info *cifs_sb; | |
299 | ||
b74c79e9 NP |
300 | if (flags & IPERM_FLAG_RCU) |
301 | return -ECHILD; | |
302 | ||
1da177e4 LT |
303 | cifs_sb = CIFS_SB(inode->i_sb); |
304 | ||
f696a365 MS |
305 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) { |
306 | if ((mask & MAY_EXEC) && !execute_ok(inode)) | |
307 | return -EACCES; | |
308 | else | |
309 | return 0; | |
310 | } else /* file mode might have been restricted at mount time | |
50c2f753 | 311 | on the client (above and beyond ACL on servers) for |
1da177e4 | 312 | servers which do not support setting and viewing mode bits, |
50c2f753 | 313 | so allowing client to check permissions is useful */ |
b74c79e9 | 314 | return generic_permission(inode, mask, flags, NULL); |
1da177e4 LT |
315 | } |
316 | ||
e18b890b CL |
317 | static struct kmem_cache *cifs_inode_cachep; |
318 | static struct kmem_cache *cifs_req_cachep; | |
319 | static struct kmem_cache *cifs_mid_cachep; | |
e18b890b | 320 | static struct kmem_cache *cifs_sm_req_cachep; |
1da177e4 LT |
321 | mempool_t *cifs_sm_req_poolp; |
322 | mempool_t *cifs_req_poolp; | |
323 | mempool_t *cifs_mid_poolp; | |
324 | ||
325 | static struct inode * | |
326 | cifs_alloc_inode(struct super_block *sb) | |
327 | { | |
328 | struct cifsInodeInfo *cifs_inode; | |
e94b1766 | 329 | cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
330 | if (!cifs_inode) |
331 | return NULL; | |
332 | cifs_inode->cifsAttrs = 0x20; /* default */ | |
1da177e4 LT |
333 | cifs_inode->time = 0; |
334 | /* Until the file is open and we have gotten oplock | |
335 | info back from the server, can not assume caching of | |
336 | file data or metadata */ | |
c6723628 | 337 | cifs_set_oplock_level(cifs_inode, 0); |
9a8165fc | 338 | cifs_inode->delete_pending = false; |
df2cf170 | 339 | cifs_inode->invalid_mapping = false; |
1da177e4 | 340 | cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */ |
fbec9ab9 | 341 | cifs_inode->server_eof = 0; |
20054bd6 JL |
342 | cifs_inode->uniqueid = 0; |
343 | cifs_inode->createtime = 0; | |
50c2f753 | 344 | |
1b2b2126 SF |
345 | /* Can not set i_flags here - they get immediately overwritten |
346 | to zero by the VFS */ | |
347 | /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME;*/ | |
1da177e4 LT |
348 | INIT_LIST_HEAD(&cifs_inode->openFileList); |
349 | return &cifs_inode->vfs_inode; | |
350 | } | |
351 | ||
fa0d7e3d NP |
352 | static void cifs_i_callback(struct rcu_head *head) |
353 | { | |
354 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
355 | INIT_LIST_HEAD(&inode->i_dentry); | |
356 | kmem_cache_free(cifs_inode_cachep, CIFS_I(inode)); | |
357 | } | |
358 | ||
1da177e4 LT |
359 | static void |
360 | cifs_destroy_inode(struct inode *inode) | |
361 | { | |
fa0d7e3d | 362 | call_rcu(&inode->i_rcu, cifs_i_callback); |
1da177e4 LT |
363 | } |
364 | ||
9451a9a5 | 365 | static void |
b57922d9 | 366 | cifs_evict_inode(struct inode *inode) |
9451a9a5 | 367 | { |
b57922d9 AV |
368 | truncate_inode_pages(&inode->i_data, 0); |
369 | end_writeback(inode); | |
9451a9a5 SJ |
370 | cifs_fscache_release_inode_cookie(inode); |
371 | } | |
372 | ||
61f98ffd JL |
373 | static void |
374 | cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server) | |
375 | { | |
a9f1b85e PS |
376 | struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr; |
377 | struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr; | |
378 | ||
61f98ffd JL |
379 | seq_printf(s, ",addr="); |
380 | ||
a9f1b85e | 381 | switch (server->dstaddr.ss_family) { |
61f98ffd | 382 | case AF_INET: |
a9f1b85e | 383 | seq_printf(s, "%pI4", &sa->sin_addr.s_addr); |
61f98ffd JL |
384 | break; |
385 | case AF_INET6: | |
a9f1b85e PS |
386 | seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr); |
387 | if (sa6->sin6_scope_id) | |
388 | seq_printf(s, "%%%u", sa6->sin6_scope_id); | |
61f98ffd JL |
389 | break; |
390 | default: | |
391 | seq_printf(s, "(unknown)"); | |
392 | } | |
393 | } | |
394 | ||
1da177e4 LT |
395 | /* |
396 | * cifs_show_options() is for displaying mount options in /proc/mounts. | |
397 | * Not all settable options are displayed but most of the important | |
398 | * ones are. | |
399 | */ | |
400 | static int | |
401 | cifs_show_options(struct seq_file *s, struct vfsmount *m) | |
402 | { | |
8e047d09 | 403 | struct cifs_sb_info *cifs_sb = CIFS_SB(m->mnt_sb); |
0d424ad0 | 404 | struct cifsTconInfo *tcon = cifs_sb_master_tcon(cifs_sb); |
3eb9a889 BG |
405 | struct sockaddr *srcaddr; |
406 | srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr; | |
8616e0fc | 407 | |
8e047d09 | 408 | seq_printf(s, ",unc=%s", tcon->treeName); |
29e07c82 JL |
409 | |
410 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) | |
411 | seq_printf(s, ",multiuser"); | |
8727c8a8 SF |
412 | else if (tcon->ses->user_name) |
413 | seq_printf(s, ",username=%s", tcon->ses->user_name); | |
29e07c82 | 414 | |
8616e0fc JL |
415 | if (tcon->ses->domainName) |
416 | seq_printf(s, ",domain=%s", tcon->ses->domainName); | |
417 | ||
3eb9a889 BG |
418 | if (srcaddr->sa_family != AF_UNSPEC) { |
419 | struct sockaddr_in *saddr4; | |
420 | struct sockaddr_in6 *saddr6; | |
421 | saddr4 = (struct sockaddr_in *)srcaddr; | |
422 | saddr6 = (struct sockaddr_in6 *)srcaddr; | |
423 | if (srcaddr->sa_family == AF_INET6) | |
424 | seq_printf(s, ",srcaddr=%pI6c", | |
425 | &saddr6->sin6_addr); | |
426 | else if (srcaddr->sa_family == AF_INET) | |
427 | seq_printf(s, ",srcaddr=%pI4", | |
428 | &saddr4->sin_addr.s_addr); | |
429 | else | |
430 | seq_printf(s, ",srcaddr=BAD-AF:%i", | |
431 | (int)(srcaddr->sa_family)); | |
432 | } | |
433 | ||
8616e0fc | 434 | seq_printf(s, ",uid=%d", cifs_sb->mnt_uid); |
340481a3 JL |
435 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) |
436 | seq_printf(s, ",forceuid"); | |
4486d6ed JL |
437 | else |
438 | seq_printf(s, ",noforceuid"); | |
340481a3 | 439 | |
8616e0fc | 440 | seq_printf(s, ",gid=%d", cifs_sb->mnt_gid); |
340481a3 JL |
441 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) |
442 | seq_printf(s, ",forcegid"); | |
4486d6ed JL |
443 | else |
444 | seq_printf(s, ",noforcegid"); | |
8616e0fc | 445 | |
61f98ffd | 446 | cifs_show_address(s, tcon->ses->server); |
1da177e4 | 447 | |
8616e0fc JL |
448 | if (!tcon->unix_ext) |
449 | seq_printf(s, ",file_mode=0%o,dir_mode=0%o", | |
2b280fab SF |
450 | cifs_sb->mnt_file_mode, |
451 | cifs_sb->mnt_dir_mode); | |
8616e0fc JL |
452 | if (tcon->seal) |
453 | seq_printf(s, ",seal"); | |
454 | if (tcon->nocase) | |
455 | seq_printf(s, ",nocase"); | |
456 | if (tcon->retry) | |
457 | seq_printf(s, ",hard"); | |
458 | if (cifs_sb->prepath) | |
459 | seq_printf(s, ",prepath=%s", cifs_sb->prepath); | |
460 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) | |
461 | seq_printf(s, ",posixpaths"); | |
462 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) | |
463 | seq_printf(s, ",setuids"); | |
464 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) | |
465 | seq_printf(s, ",serverino"); | |
466 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) | |
467 | seq_printf(s, ",directio"); | |
468 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) | |
469 | seq_printf(s, ",nouser_xattr"); | |
470 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR) | |
471 | seq_printf(s, ",mapchars"); | |
472 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) | |
473 | seq_printf(s, ",sfu"); | |
474 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
475 | seq_printf(s, ",nobrl"); | |
476 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) | |
477 | seq_printf(s, ",cifsacl"); | |
478 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) | |
479 | seq_printf(s, ",dynperm"); | |
480 | if (m->mnt_sb->s_flags & MS_POSIXACL) | |
481 | seq_printf(s, ",acl"); | |
736a3320 SM |
482 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) |
483 | seq_printf(s, ",mfsymlinks"); | |
476428f8 SJ |
484 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE) |
485 | seq_printf(s, ",fsc"); | |
8616e0fc JL |
486 | |
487 | seq_printf(s, ",rsize=%d", cifs_sb->rsize); | |
488 | seq_printf(s, ",wsize=%d", cifs_sb->wsize); | |
6d20e840 SJ |
489 | /* convert actimeo and display it in seconds */ |
490 | seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ); | |
8616e0fc | 491 | |
1da177e4 LT |
492 | return 0; |
493 | } | |
494 | ||
42faad99 | 495 | static void cifs_umount_begin(struct super_block *sb) |
68058e75 | 496 | { |
42faad99 | 497 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
50c2f753 | 498 | struct cifsTconInfo *tcon; |
68058e75 | 499 | |
4523cc30 | 500 | if (cifs_sb == NULL) |
9e2e85f8 SF |
501 | return; |
502 | ||
0d424ad0 | 503 | tcon = cifs_sb_master_tcon(cifs_sb); |
f1987b44 | 504 | |
3f9bcca7 | 505 | spin_lock(&cifs_tcp_ses_lock); |
ad8034f1 SF |
506 | if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) { |
507 | /* we have other mounts to same share or we have | |
508 | already tried to force umount this and woken up | |
509 | all waiting network requests, nothing to do */ | |
3f9bcca7 | 510 | spin_unlock(&cifs_tcp_ses_lock); |
ad8034f1 SF |
511 | return; |
512 | } else if (tcon->tc_count == 1) | |
5e1253b5 | 513 | tcon->tidStatus = CifsExiting; |
3f9bcca7 | 514 | spin_unlock(&cifs_tcp_ses_lock); |
5e1253b5 | 515 | |
3a5ff61c | 516 | /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */ |
7b7abfe3 | 517 | /* cancel_notify_requests(tcon); */ |
50c2f753 | 518 | if (tcon->ses && tcon->ses->server) { |
b6b38f70 | 519 | cFYI(1, "wake up tasks now - umount begin not complete"); |
9e2e85f8 | 520 | wake_up_all(&tcon->ses->server->request_q); |
6ab16d24 SF |
521 | wake_up_all(&tcon->ses->server->response_q); |
522 | msleep(1); /* yield */ | |
523 | /* we have to kick the requests once more */ | |
524 | wake_up_all(&tcon->ses->server->response_q); | |
525 | msleep(1); | |
5e1253b5 | 526 | } |
68058e75 SF |
527 | |
528 | return; | |
529 | } | |
68058e75 | 530 | |
bf97d287 SF |
531 | #ifdef CONFIG_CIFS_STATS2 |
532 | static int cifs_show_stats(struct seq_file *s, struct vfsmount *mnt) | |
533 | { | |
534 | /* BB FIXME */ | |
535 | return 0; | |
536 | } | |
537 | #endif | |
538 | ||
1da177e4 LT |
539 | static int cifs_remount(struct super_block *sb, int *flags, char *data) |
540 | { | |
541 | *flags |= MS_NODIRATIME; | |
542 | return 0; | |
543 | } | |
544 | ||
45321ac5 | 545 | static int cifs_drop_inode(struct inode *inode) |
12420ac3 JL |
546 | { |
547 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
548 | ||
45321ac5 AV |
549 | /* no serverino => unconditional eviction */ |
550 | return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) || | |
551 | generic_drop_inode(inode); | |
12420ac3 JL |
552 | } |
553 | ||
ee9b6d61 | 554 | static const struct super_operations cifs_super_ops = { |
1da177e4 LT |
555 | .put_super = cifs_put_super, |
556 | .statfs = cifs_statfs, | |
557 | .alloc_inode = cifs_alloc_inode, | |
558 | .destroy_inode = cifs_destroy_inode, | |
12420ac3 | 559 | .drop_inode = cifs_drop_inode, |
b57922d9 | 560 | .evict_inode = cifs_evict_inode, |
12420ac3 JL |
561 | /* .delete_inode = cifs_delete_inode, */ /* Do not need above |
562 | function unless later we add lazy close of inodes or unless the | |
50c2f753 SF |
563 | kernel forgets to call us with the same number of releases (closes) |
564 | as opens */ | |
1da177e4 | 565 | .show_options = cifs_show_options, |
7b7abfe3 | 566 | .umount_begin = cifs_umount_begin, |
1da177e4 | 567 | .remount_fs = cifs_remount, |
bf97d287 | 568 | #ifdef CONFIG_CIFS_STATS2 |
f46d3e11 | 569 | .show_stats = cifs_show_stats, |
bf97d287 | 570 | #endif |
1da177e4 LT |
571 | }; |
572 | ||
d753ed97 AV |
573 | static struct dentry * |
574 | cifs_do_mount(struct file_system_type *fs_type, | |
575 | int flags, const char *dev_name, void *data) | |
1da177e4 LT |
576 | { |
577 | int rc; | |
db719222 JB |
578 | struct super_block *sb; |
579 | ||
db719222 | 580 | sb = sget(fs_type, NULL, set_anon_super, NULL); |
1da177e4 | 581 | |
b6b38f70 | 582 | cFYI(1, "Devname: %s flags: %d ", dev_name, flags); |
1da177e4 | 583 | |
b0991aa3 | 584 | if (IS_ERR(sb)) |
d753ed97 | 585 | return ERR_CAST(sb); |
1da177e4 LT |
586 | |
587 | sb->s_flags = flags; | |
588 | ||
9b04c997 | 589 | rc = cifs_read_super(sb, data, dev_name, flags & MS_SILENT ? 1 : 0); |
1da177e4 | 590 | if (rc) { |
6f5bbff9 | 591 | deactivate_locked_super(sb); |
d753ed97 | 592 | return ERR_PTR(rc); |
1da177e4 LT |
593 | } |
594 | sb->s_flags |= MS_ACTIVE; | |
d753ed97 | 595 | return dget(sb->s_root); |
1da177e4 LT |
596 | } |
597 | ||
027445c3 BP |
598 | static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov, |
599 | unsigned long nr_segs, loff_t pos) | |
1da177e4 | 600 | { |
e6a00296 | 601 | struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode; |
1da177e4 | 602 | ssize_t written; |
72432ffc | 603 | int rc; |
1da177e4 | 604 | |
027445c3 | 605 | written = generic_file_aio_write(iocb, iov, nr_segs, pos); |
72432ffc PS |
606 | |
607 | if (CIFS_I(inode)->clientCanCacheAll) | |
608 | return written; | |
609 | ||
610 | rc = filemap_fdatawrite(inode->i_mapping); | |
611 | if (rc) | |
612 | cFYI(1, "cifs_file_aio_write: %d rc on %p inode", rc, inode); | |
613 | ||
1da177e4 LT |
614 | return written; |
615 | } | |
616 | ||
c32a0b68 SF |
617 | static loff_t cifs_llseek(struct file *file, loff_t offset, int origin) |
618 | { | |
619 | /* origin == SEEK_END => we must revalidate the cached file length */ | |
0889a944 | 620 | if (origin == SEEK_END) { |
030e9d81 SF |
621 | int retval; |
622 | ||
623 | /* some applications poll for the file length in this strange | |
624 | way so we must seek to end on non-oplocked files by | |
625 | setting the revalidate time to zero */ | |
c33f8d32 | 626 | CIFS_I(file->f_path.dentry->d_inode)->time = 0; |
030e9d81 | 627 | |
abab095d | 628 | retval = cifs_revalidate_file(file); |
c32a0b68 SF |
629 | if (retval < 0) |
630 | return (loff_t)retval; | |
631 | } | |
9465efc9 | 632 | return generic_file_llseek_unlocked(file, offset, origin); |
c32a0b68 SF |
633 | } |
634 | ||
84210e91 SF |
635 | static int cifs_setlease(struct file *file, long arg, struct file_lock **lease) |
636 | { | |
b89f4321 AB |
637 | /* note that this is called by vfs setlease with lock_flocks held |
638 | to protect *lease from going away */ | |
84210e91 | 639 | struct inode *inode = file->f_path.dentry->d_inode; |
ba00ba64 | 640 | struct cifsFileInfo *cfile = file->private_data; |
84210e91 SF |
641 | |
642 | if (!(S_ISREG(inode->i_mode))) | |
643 | return -EINVAL; | |
644 | ||
645 | /* check if file is oplocked */ | |
646 | if (((arg == F_RDLCK) && | |
647 | (CIFS_I(inode)->clientCanCacheRead)) || | |
648 | ((arg == F_WRLCK) && | |
649 | (CIFS_I(inode)->clientCanCacheAll))) | |
650 | return generic_setlease(file, arg, lease); | |
13cfb733 JL |
651 | else if (tlink_tcon(cfile->tlink)->local_lease && |
652 | !CIFS_I(inode)->clientCanCacheRead) | |
84210e91 SF |
653 | /* If the server claims to support oplock on this |
654 | file, then we still need to check oplock even | |
655 | if the local_lease mount option is set, but there | |
656 | are servers which do not support oplock for which | |
657 | this mount option may be useful if the user | |
658 | knows that the file won't be changed on the server | |
659 | by anyone else */ | |
660 | return generic_setlease(file, arg, lease); | |
51ee4b84 | 661 | else |
84210e91 SF |
662 | return -EAGAIN; |
663 | } | |
84210e91 | 664 | |
e6ab1582 | 665 | struct file_system_type cifs_fs_type = { |
1da177e4 LT |
666 | .owner = THIS_MODULE, |
667 | .name = "cifs", | |
d753ed97 | 668 | .mount = cifs_do_mount, |
1da177e4 LT |
669 | .kill_sb = kill_anon_super, |
670 | /* .fs_flags */ | |
671 | }; | |
754661f1 | 672 | const struct inode_operations cifs_dir_inode_ops = { |
1da177e4 LT |
673 | .create = cifs_create, |
674 | .lookup = cifs_lookup, | |
675 | .getattr = cifs_getattr, | |
676 | .unlink = cifs_unlink, | |
677 | .link = cifs_hardlink, | |
678 | .mkdir = cifs_mkdir, | |
679 | .rmdir = cifs_rmdir, | |
680 | .rename = cifs_rename, | |
681 | .permission = cifs_permission, | |
682 | /* revalidate:cifs_revalidate, */ | |
683 | .setattr = cifs_setattr, | |
684 | .symlink = cifs_symlink, | |
685 | .mknod = cifs_mknod, | |
686 | #ifdef CONFIG_CIFS_XATTR | |
687 | .setxattr = cifs_setxattr, | |
688 | .getxattr = cifs_getxattr, | |
689 | .listxattr = cifs_listxattr, | |
690 | .removexattr = cifs_removexattr, | |
691 | #endif | |
692 | }; | |
693 | ||
754661f1 | 694 | const struct inode_operations cifs_file_inode_ops = { |
1da177e4 LT |
695 | /* revalidate:cifs_revalidate, */ |
696 | .setattr = cifs_setattr, | |
697 | .getattr = cifs_getattr, /* do we need this anymore? */ | |
698 | .rename = cifs_rename, | |
699 | .permission = cifs_permission, | |
700 | #ifdef CONFIG_CIFS_XATTR | |
701 | .setxattr = cifs_setxattr, | |
702 | .getxattr = cifs_getxattr, | |
703 | .listxattr = cifs_listxattr, | |
704 | .removexattr = cifs_removexattr, | |
50c2f753 | 705 | #endif |
1da177e4 LT |
706 | }; |
707 | ||
754661f1 | 708 | const struct inode_operations cifs_symlink_inode_ops = { |
50c2f753 | 709 | .readlink = generic_readlink, |
1da177e4 LT |
710 | .follow_link = cifs_follow_link, |
711 | .put_link = cifs_put_link, | |
712 | .permission = cifs_permission, | |
713 | /* BB add the following two eventually */ | |
714 | /* revalidate: cifs_revalidate, | |
715 | setattr: cifs_notify_change, *//* BB do we need notify change */ | |
716 | #ifdef CONFIG_CIFS_XATTR | |
717 | .setxattr = cifs_setxattr, | |
718 | .getxattr = cifs_getxattr, | |
719 | .listxattr = cifs_listxattr, | |
720 | .removexattr = cifs_removexattr, | |
50c2f753 | 721 | #endif |
1da177e4 LT |
722 | }; |
723 | ||
4b6f5d20 | 724 | const struct file_operations cifs_file_ops = { |
87c89dd7 SF |
725 | .read = do_sync_read, |
726 | .write = do_sync_write, | |
87c89dd7 SF |
727 | .aio_read = generic_file_aio_read, |
728 | .aio_write = cifs_file_aio_write, | |
1da177e4 LT |
729 | .open = cifs_open, |
730 | .release = cifs_close, | |
731 | .lock = cifs_lock, | |
732 | .fsync = cifs_fsync, | |
733 | .flush = cifs_flush, | |
734 | .mmap = cifs_file_mmap, | |
5ffc4ef4 | 735 | .splice_read = generic_file_splice_read, |
c32a0b68 | 736 | .llseek = cifs_llseek, |
c67593a0 | 737 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 738 | .unlocked_ioctl = cifs_ioctl, |
c67593a0 | 739 | #endif /* CONFIG_CIFS_POSIX */ |
84210e91 | 740 | .setlease = cifs_setlease, |
1da177e4 LT |
741 | }; |
742 | ||
8be7e6ba PS |
743 | const struct file_operations cifs_file_strict_ops = { |
744 | .read = do_sync_read, | |
745 | .write = do_sync_write, | |
a70307ee | 746 | .aio_read = cifs_strict_readv, |
72432ffc | 747 | .aio_write = cifs_strict_writev, |
8be7e6ba PS |
748 | .open = cifs_open, |
749 | .release = cifs_close, | |
750 | .lock = cifs_lock, | |
751 | .fsync = cifs_strict_fsync, | |
752 | .flush = cifs_flush, | |
7a6a19b1 | 753 | .mmap = cifs_file_strict_mmap, |
8be7e6ba PS |
754 | .splice_read = generic_file_splice_read, |
755 | .llseek = cifs_llseek, | |
756 | #ifdef CONFIG_CIFS_POSIX | |
757 | .unlocked_ioctl = cifs_ioctl, | |
758 | #endif /* CONFIG_CIFS_POSIX */ | |
759 | .setlease = cifs_setlease, | |
760 | }; | |
761 | ||
4b6f5d20 | 762 | const struct file_operations cifs_file_direct_ops = { |
a994b8fa | 763 | /* no aio, no readv - |
1da177e4 LT |
764 | BB reevaluate whether they can be done with directio, no cache */ |
765 | .read = cifs_user_read, | |
766 | .write = cifs_user_write, | |
767 | .open = cifs_open, | |
768 | .release = cifs_close, | |
769 | .lock = cifs_lock, | |
770 | .fsync = cifs_fsync, | |
771 | .flush = cifs_flush, | |
a994b8fa | 772 | .mmap = cifs_file_mmap, |
5ffc4ef4 | 773 | .splice_read = generic_file_splice_read, |
c67593a0 | 774 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 775 | .unlocked_ioctl = cifs_ioctl, |
c67593a0 | 776 | #endif /* CONFIG_CIFS_POSIX */ |
c32a0b68 | 777 | .llseek = cifs_llseek, |
84210e91 | 778 | .setlease = cifs_setlease, |
1da177e4 | 779 | }; |
8be7e6ba | 780 | |
4b6f5d20 | 781 | const struct file_operations cifs_file_nobrl_ops = { |
87c89dd7 SF |
782 | .read = do_sync_read, |
783 | .write = do_sync_write, | |
87c89dd7 SF |
784 | .aio_read = generic_file_aio_read, |
785 | .aio_write = cifs_file_aio_write, | |
786 | .open = cifs_open, | |
787 | .release = cifs_close, | |
788 | .fsync = cifs_fsync, | |
789 | .flush = cifs_flush, | |
790 | .mmap = cifs_file_mmap, | |
5ffc4ef4 | 791 | .splice_read = generic_file_splice_read, |
c32a0b68 | 792 | .llseek = cifs_llseek, |
8b94bcb9 | 793 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 794 | .unlocked_ioctl = cifs_ioctl, |
8b94bcb9 | 795 | #endif /* CONFIG_CIFS_POSIX */ |
84210e91 | 796 | .setlease = cifs_setlease, |
8b94bcb9 SF |
797 | }; |
798 | ||
8be7e6ba PS |
799 | const struct file_operations cifs_file_strict_nobrl_ops = { |
800 | .read = do_sync_read, | |
801 | .write = do_sync_write, | |
a70307ee | 802 | .aio_read = cifs_strict_readv, |
72432ffc | 803 | .aio_write = cifs_strict_writev, |
8be7e6ba PS |
804 | .open = cifs_open, |
805 | .release = cifs_close, | |
806 | .fsync = cifs_strict_fsync, | |
807 | .flush = cifs_flush, | |
7a6a19b1 | 808 | .mmap = cifs_file_strict_mmap, |
8be7e6ba PS |
809 | .splice_read = generic_file_splice_read, |
810 | .llseek = cifs_llseek, | |
811 | #ifdef CONFIG_CIFS_POSIX | |
812 | .unlocked_ioctl = cifs_ioctl, | |
813 | #endif /* CONFIG_CIFS_POSIX */ | |
814 | .setlease = cifs_setlease, | |
815 | }; | |
816 | ||
4b6f5d20 | 817 | const struct file_operations cifs_file_direct_nobrl_ops = { |
50c2f753 | 818 | /* no mmap, no aio, no readv - |
87c89dd7 SF |
819 | BB reevaluate whether they can be done with directio, no cache */ |
820 | .read = cifs_user_read, | |
821 | .write = cifs_user_write, | |
822 | .open = cifs_open, | |
823 | .release = cifs_close, | |
824 | .fsync = cifs_fsync, | |
825 | .flush = cifs_flush, | |
810627a0 | 826 | .mmap = cifs_file_mmap, |
5ffc4ef4 | 827 | .splice_read = generic_file_splice_read, |
8b94bcb9 | 828 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 829 | .unlocked_ioctl = cifs_ioctl, |
8b94bcb9 | 830 | #endif /* CONFIG_CIFS_POSIX */ |
c32a0b68 | 831 | .llseek = cifs_llseek, |
84210e91 | 832 | .setlease = cifs_setlease, |
8b94bcb9 | 833 | }; |
1da177e4 | 834 | |
4b6f5d20 | 835 | const struct file_operations cifs_dir_ops = { |
1da177e4 LT |
836 | .readdir = cifs_readdir, |
837 | .release = cifs_closedir, | |
838 | .read = generic_read_dir, | |
f9ddcca4 | 839 | .unlocked_ioctl = cifs_ioctl, |
3222a3e5 | 840 | .llseek = generic_file_llseek, |
1da177e4 LT |
841 | }; |
842 | ||
843 | static void | |
51cc5068 | 844 | cifs_init_once(void *inode) |
1da177e4 LT |
845 | { |
846 | struct cifsInodeInfo *cifsi = inode; | |
847 | ||
a35afb83 CL |
848 | inode_init_once(&cifsi->vfs_inode); |
849 | INIT_LIST_HEAD(&cifsi->lockList); | |
1da177e4 LT |
850 | } |
851 | ||
852 | static int | |
853 | cifs_init_inodecache(void) | |
854 | { | |
855 | cifs_inode_cachep = kmem_cache_create("cifs_inode_cache", | |
26f57364 | 856 | sizeof(struct cifsInodeInfo), |
fffb60f9 PJ |
857 | 0, (SLAB_RECLAIM_ACCOUNT| |
858 | SLAB_MEM_SPREAD), | |
20c2df83 | 859 | cifs_init_once); |
1da177e4 LT |
860 | if (cifs_inode_cachep == NULL) |
861 | return -ENOMEM; | |
862 | ||
863 | return 0; | |
864 | } | |
865 | ||
866 | static void | |
867 | cifs_destroy_inodecache(void) | |
868 | { | |
1a1d92c1 | 869 | kmem_cache_destroy(cifs_inode_cachep); |
1da177e4 LT |
870 | } |
871 | ||
872 | static int | |
873 | cifs_init_request_bufs(void) | |
874 | { | |
4523cc30 | 875 | if (CIFSMaxBufSize < 8192) { |
1da177e4 LT |
876 | /* Buffer size can not be smaller than 2 * PATH_MAX since maximum |
877 | Unicode path name has to fit in any SMB/CIFS path based frames */ | |
878 | CIFSMaxBufSize = 8192; | |
879 | } else if (CIFSMaxBufSize > 1024*127) { | |
880 | CIFSMaxBufSize = 1024 * 127; | |
881 | } else { | |
882 | CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/ | |
883 | } | |
b6b38f70 | 884 | /* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */ |
1da177e4 LT |
885 | cifs_req_cachep = kmem_cache_create("cifs_request", |
886 | CIFSMaxBufSize + | |
887 | MAX_CIFS_HDR_SIZE, 0, | |
20c2df83 | 888 | SLAB_HWCACHE_ALIGN, NULL); |
1da177e4 LT |
889 | if (cifs_req_cachep == NULL) |
890 | return -ENOMEM; | |
891 | ||
4523cc30 | 892 | if (cifs_min_rcv < 1) |
1da177e4 LT |
893 | cifs_min_rcv = 1; |
894 | else if (cifs_min_rcv > 64) { | |
895 | cifs_min_rcv = 64; | |
b6b38f70 | 896 | cERROR(1, "cifs_min_rcv set to maximum (64)"); |
1da177e4 LT |
897 | } |
898 | ||
93d2341c MD |
899 | cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv, |
900 | cifs_req_cachep); | |
1da177e4 | 901 | |
4523cc30 | 902 | if (cifs_req_poolp == NULL) { |
1da177e4 LT |
903 | kmem_cache_destroy(cifs_req_cachep); |
904 | return -ENOMEM; | |
905 | } | |
ec637e3f | 906 | /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and |
1da177e4 LT |
907 | almost all handle based requests (but not write response, nor is it |
908 | sufficient for path based requests). A smaller size would have | |
50c2f753 | 909 | been more efficient (compacting multiple slab items on one 4k page) |
1da177e4 LT |
910 | for the case in which debug was on, but this larger size allows |
911 | more SMBs to use small buffer alloc and is still much more | |
6dc0f87e | 912 | efficient to alloc 1 per page off the slab compared to 17K (5page) |
1da177e4 LT |
913 | alloc of large cifs buffers even when page debugging is on */ |
914 | cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq", | |
6dc0f87e | 915 | MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN, |
20c2df83 | 916 | NULL); |
1da177e4 LT |
917 | if (cifs_sm_req_cachep == NULL) { |
918 | mempool_destroy(cifs_req_poolp); | |
919 | kmem_cache_destroy(cifs_req_cachep); | |
6dc0f87e | 920 | return -ENOMEM; |
1da177e4 LT |
921 | } |
922 | ||
4523cc30 | 923 | if (cifs_min_small < 2) |
1da177e4 LT |
924 | cifs_min_small = 2; |
925 | else if (cifs_min_small > 256) { | |
926 | cifs_min_small = 256; | |
b6b38f70 | 927 | cFYI(1, "cifs_min_small set to maximum (256)"); |
1da177e4 LT |
928 | } |
929 | ||
93d2341c MD |
930 | cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small, |
931 | cifs_sm_req_cachep); | |
1da177e4 | 932 | |
4523cc30 | 933 | if (cifs_sm_req_poolp == NULL) { |
1da177e4 LT |
934 | mempool_destroy(cifs_req_poolp); |
935 | kmem_cache_destroy(cifs_req_cachep); | |
936 | kmem_cache_destroy(cifs_sm_req_cachep); | |
937 | return -ENOMEM; | |
938 | } | |
939 | ||
940 | return 0; | |
941 | } | |
942 | ||
943 | static void | |
944 | cifs_destroy_request_bufs(void) | |
945 | { | |
946 | mempool_destroy(cifs_req_poolp); | |
1a1d92c1 | 947 | kmem_cache_destroy(cifs_req_cachep); |
1da177e4 | 948 | mempool_destroy(cifs_sm_req_poolp); |
1a1d92c1 | 949 | kmem_cache_destroy(cifs_sm_req_cachep); |
1da177e4 LT |
950 | } |
951 | ||
952 | static int | |
953 | cifs_init_mids(void) | |
954 | { | |
955 | cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids", | |
26f57364 SF |
956 | sizeof(struct mid_q_entry), 0, |
957 | SLAB_HWCACHE_ALIGN, NULL); | |
1da177e4 LT |
958 | if (cifs_mid_cachep == NULL) |
959 | return -ENOMEM; | |
960 | ||
93d2341c MD |
961 | /* 3 is a reasonable minimum number of simultaneous operations */ |
962 | cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep); | |
4523cc30 | 963 | if (cifs_mid_poolp == NULL) { |
1da177e4 LT |
964 | kmem_cache_destroy(cifs_mid_cachep); |
965 | return -ENOMEM; | |
966 | } | |
967 | ||
1da177e4 LT |
968 | return 0; |
969 | } | |
970 | ||
971 | static void | |
972 | cifs_destroy_mids(void) | |
973 | { | |
974 | mempool_destroy(cifs_mid_poolp); | |
1a1d92c1 | 975 | kmem_cache_destroy(cifs_mid_cachep); |
1da177e4 LT |
976 | } |
977 | ||
1da177e4 LT |
978 | static int __init |
979 | init_cifs(void) | |
980 | { | |
981 | int rc = 0; | |
1da177e4 | 982 | cifs_proc_init(); |
e7ddee90 | 983 | INIT_LIST_HEAD(&cifs_tcp_ses_list); |
0eff0e26 | 984 | #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */ |
4ca9c190 SF |
985 | INIT_LIST_HEAD(&GlobalDnotifyReqList); |
986 | INIT_LIST_HEAD(&GlobalDnotifyRsp_Q); | |
0eff0e26 | 987 | #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */ |
1da177e4 LT |
988 | /* |
989 | * Initialize Global counters | |
990 | */ | |
991 | atomic_set(&sesInfoAllocCount, 0); | |
992 | atomic_set(&tconInfoAllocCount, 0); | |
6dc0f87e | 993 | atomic_set(&tcpSesAllocCount, 0); |
1da177e4 LT |
994 | atomic_set(&tcpSesReconnectCount, 0); |
995 | atomic_set(&tconInfoReconnectCount, 0); | |
996 | ||
997 | atomic_set(&bufAllocCount, 0); | |
4498eed5 SF |
998 | atomic_set(&smBufAllocCount, 0); |
999 | #ifdef CONFIG_CIFS_STATS2 | |
1000 | atomic_set(&totBufAllocCount, 0); | |
1001 | atomic_set(&totSmBufAllocCount, 0); | |
1002 | #endif /* CONFIG_CIFS_STATS2 */ | |
1003 | ||
1da177e4 LT |
1004 | atomic_set(&midCount, 0); |
1005 | GlobalCurrentXid = 0; | |
1006 | GlobalTotalActiveXid = 0; | |
1007 | GlobalMaxActiveXid = 0; | |
3f9bcca7 | 1008 | spin_lock_init(&cifs_tcp_ses_lock); |
4477288a | 1009 | spin_lock_init(&cifs_file_list_lock); |
1da177e4 LT |
1010 | spin_lock_init(&GlobalMid_Lock); |
1011 | ||
4523cc30 | 1012 | if (cifs_max_pending < 2) { |
1da177e4 | 1013 | cifs_max_pending = 2; |
b6b38f70 | 1014 | cFYI(1, "cifs_max_pending set to min of 2"); |
4523cc30 | 1015 | } else if (cifs_max_pending > 256) { |
1da177e4 | 1016 | cifs_max_pending = 256; |
b6b38f70 | 1017 | cFYI(1, "cifs_max_pending set to max of 256"); |
1da177e4 LT |
1018 | } |
1019 | ||
f579cf3c SJ |
1020 | rc = cifs_fscache_register(); |
1021 | if (rc) | |
d3bf5221 | 1022 | goto out_clean_proc; |
f579cf3c | 1023 | |
1da177e4 | 1024 | rc = cifs_init_inodecache(); |
45af7a0f | 1025 | if (rc) |
d3bf5221 | 1026 | goto out_unreg_fscache; |
45af7a0f SF |
1027 | |
1028 | rc = cifs_init_mids(); | |
1029 | if (rc) | |
1030 | goto out_destroy_inodecache; | |
1031 | ||
1032 | rc = cifs_init_request_bufs(); | |
1033 | if (rc) | |
1034 | goto out_destroy_mids; | |
1035 | ||
84a15b93 JL |
1036 | #ifdef CONFIG_CIFS_UPCALL |
1037 | rc = register_key_type(&cifs_spnego_key_type); | |
1038 | if (rc) | |
4d79dba0 SP |
1039 | goto out_destroy_request_bufs; |
1040 | #endif /* CONFIG_CIFS_UPCALL */ | |
1041 | ||
1042 | #ifdef CONFIG_CIFS_ACL | |
1043 | rc = init_cifs_idmap(); | |
1044 | if (rc) | |
1045 | goto out_destroy_request_bufs; | |
1046 | #endif /* CONFIG_CIFS_ACL */ | |
1047 | ||
1048 | rc = register_filesystem(&cifs_fs_type); | |
1049 | if (rc) | |
1050 | goto out_destroy_request_bufs; | |
45af7a0f | 1051 | |
45af7a0f SF |
1052 | return 0; |
1053 | ||
4d79dba0 SP |
1054 | out_destroy_request_bufs: |
1055 | #ifdef CONFIG_CIFS_ACL | |
1056 | exit_cifs_idmap(); | |
1057 | #endif | |
84a15b93 | 1058 | #ifdef CONFIG_CIFS_UPCALL |
4d79dba0 | 1059 | unregister_key_type(&cifs_spnego_key_type); |
1fc7995d | 1060 | #endif |
45af7a0f | 1061 | cifs_destroy_request_bufs(); |
d3bf5221 | 1062 | out_destroy_mids: |
45af7a0f | 1063 | cifs_destroy_mids(); |
d3bf5221 | 1064 | out_destroy_inodecache: |
45af7a0f | 1065 | cifs_destroy_inodecache(); |
d3bf5221 | 1066 | out_unreg_fscache: |
f579cf3c | 1067 | cifs_fscache_unregister(); |
d3bf5221 SF |
1068 | out_clean_proc: |
1069 | cifs_proc_clean(); | |
1da177e4 LT |
1070 | return rc; |
1071 | } | |
1072 | ||
1073 | static void __exit | |
1074 | exit_cifs(void) | |
1075 | { | |
b6b38f70 | 1076 | cFYI(DBG2, "exit_cifs"); |
1da177e4 | 1077 | cifs_proc_clean(); |
f579cf3c | 1078 | cifs_fscache_unregister(); |
6103335d | 1079 | #ifdef CONFIG_CIFS_DFS_UPCALL |
78d31a3a | 1080 | cifs_dfs_release_automount_timer(); |
6103335d | 1081 | #endif |
4d79dba0 SP |
1082 | #ifdef CONFIG_CIFS_ACL |
1083 | cifs_destroy_idmaptrees(); | |
1084 | exit_cifs_idmap(); | |
1085 | #endif | |
84a15b93 JL |
1086 | #ifdef CONFIG_CIFS_UPCALL |
1087 | unregister_key_type(&cifs_spnego_key_type); | |
1da177e4 LT |
1088 | #endif |
1089 | unregister_filesystem(&cifs_fs_type); | |
1090 | cifs_destroy_inodecache(); | |
1091 | cifs_destroy_mids(); | |
1092 | cifs_destroy_request_bufs(); | |
1da177e4 LT |
1093 | } |
1094 | ||
1095 | MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>"); | |
6dc0f87e | 1096 | MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */ |
1da177e4 | 1097 | MODULE_DESCRIPTION |
63135e08 SF |
1098 | ("VFS to access servers complying with the SNIA CIFS Specification " |
1099 | "e.g. Samba and Windows"); | |
1da177e4 LT |
1100 | MODULE_VERSION(CIFS_VERSION); |
1101 | module_init(init_cifs) | |
1102 | module_exit(exit_cifs) |