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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * fs/cifs/cifsfs.c | |
3 | * | |
2b280fab | 4 | * Copyright (C) International Business Machines Corp., 2002,2008 |
1da177e4 LT |
5 | * Author(s): Steve French (sfrench@us.ibm.com) |
6 | * | |
7 | * Common Internet FileSystem (CIFS) client | |
8 | * | |
9 | * This library is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU Lesser General Public License as published | |
11 | * by the Free Software Foundation; either version 2.1 of the License, or | |
12 | * (at your option) any later version. | |
13 | * | |
14 | * This library is distributed in the hope that it will be useful, | |
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
17 | * the GNU Lesser General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU Lesser General Public License | |
20 | * along with this library; if not, write to the Free Software | |
21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
22 | */ | |
23 | ||
24 | /* Note that BB means BUGBUG (ie something to fix eventually) */ | |
25 | ||
26 | #include <linux/module.h> | |
27 | #include <linux/fs.h> | |
28 | #include <linux/mount.h> | |
29 | #include <linux/slab.h> | |
30 | #include <linux/init.h> | |
31 | #include <linux/list.h> | |
32 | #include <linux/seq_file.h> | |
33 | #include <linux/vfs.h> | |
34 | #include <linux/mempool.h> | |
6ab16d24 | 35 | #include <linux/delay.h> |
45af7a0f | 36 | #include <linux/kthread.h> |
7dfb7103 | 37 | #include <linux/freezer.h> |
fec11dd9 | 38 | #include <linux/namei.h> |
b8c32dbb | 39 | #include <linux/random.h> |
3eb9a889 | 40 | #include <net/ipv6.h> |
1da177e4 LT |
41 | #include "cifsfs.h" |
42 | #include "cifspdu.h" | |
43 | #define DECLARE_GLOBALS_HERE | |
44 | #include "cifsglob.h" | |
45 | #include "cifsproto.h" | |
46 | #include "cifs_debug.h" | |
47 | #include "cifs_fs_sb.h" | |
48 | #include <linux/mm.h> | |
84a15b93 | 49 | #include <linux/key-type.h> |
e545937a | 50 | #include "cifs_spnego.h" |
f579cf3c | 51 | #include "fscache.h" |
3792c173 PS |
52 | #ifdef CONFIG_CIFS_SMB2 |
53 | #include "smb2pdu.h" | |
54 | #endif | |
1da177e4 | 55 | |
1da177e4 | 56 | int cifsFYI = 0; |
1da177e4 | 57 | int traceSMB = 0; |
e7504734 | 58 | bool enable_oplocks = true; |
1da177e4 LT |
59 | unsigned int linuxExtEnabled = 1; |
60 | unsigned int lookupCacheEnabled = 1; | |
04912d6a | 61 | unsigned int global_secflags = CIFSSEC_DEF; |
3979877e | 62 | /* unsigned int ntlmv2_support = 0; */ |
1da177e4 | 63 | unsigned int sign_CIFS_PDUs = 1; |
ee9b6d61 | 64 | static const struct super_operations cifs_super_ops; |
1da177e4 | 65 | unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE; |
60654ce0 | 66 | module_param(CIFSMaxBufSize, uint, 0); |
63135e08 SF |
67 | MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header). " |
68 | "Default: 16384 Range: 8192 to 130048"); | |
1da177e4 | 69 | unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL; |
60654ce0 | 70 | module_param(cifs_min_rcv, uint, 0); |
63135e08 SF |
71 | MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: " |
72 | "1 to 64"); | |
1da177e4 | 73 | unsigned int cifs_min_small = 30; |
60654ce0 | 74 | module_param(cifs_min_small, uint, 0); |
63135e08 SF |
75 | MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 " |
76 | "Range: 2 to 256"); | |
1da177e4 | 77 | unsigned int cifs_max_pending = CIFS_MAX_REQ; |
60654ce0 | 78 | module_param(cifs_max_pending, uint, 0444); |
63135e08 | 79 | MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server. " |
10b9b98e | 80 | "Default: 32767 Range: 2 to 32767."); |
e7504734 | 81 | module_param(enable_oplocks, bool, 0644); |
60654ce0 | 82 | MODULE_PARM_DESC(enable_oplocks, "Enable or disable oplocks. Default: y/Y/1"); |
e7504734 | 83 | |
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 | ||
da472fc8 JL |
88 | struct workqueue_struct *cifsiod_wq; |
89 | ||
b8c32dbb PS |
90 | #ifdef CONFIG_CIFS_SMB2 |
91 | __u8 cifs_client_guid[SMB2_CLIENT_GUID_SIZE]; | |
92 | #endif | |
93 | ||
24261fc2 MG |
94 | /* |
95 | * Bumps refcount for cifs super block. | |
96 | * Note that it should be only called if a referece to VFS super block is | |
97 | * already held, e.g. in open-type syscalls context. Otherwise it can race with | |
98 | * atomic_dec_and_test in deactivate_locked_super. | |
99 | */ | |
100 | void | |
101 | cifs_sb_active(struct super_block *sb) | |
102 | { | |
103 | struct cifs_sb_info *server = CIFS_SB(sb); | |
104 | ||
105 | if (atomic_inc_return(&server->active) == 1) | |
106 | atomic_inc(&sb->s_active); | |
107 | } | |
108 | ||
109 | void | |
110 | cifs_sb_deactive(struct super_block *sb) | |
111 | { | |
112 | struct cifs_sb_info *server = CIFS_SB(sb); | |
113 | ||
114 | if (atomic_dec_and_test(&server->active)) | |
115 | deactivate_super(sb); | |
116 | } | |
117 | ||
1da177e4 | 118 | static int |
97d1152a | 119 | cifs_read_super(struct super_block *sb) |
1da177e4 LT |
120 | { |
121 | struct inode *inode; | |
b2e5cd33 | 122 | struct cifs_sb_info *cifs_sb; |
2f6c9479 | 123 | struct cifs_tcon *tcon; |
1da177e4 | 124 | int rc = 0; |
50c2f753 | 125 | |
b2e5cd33 | 126 | cifs_sb = CIFS_SB(sb); |
2f6c9479 | 127 | tcon = cifs_sb_master_tcon(cifs_sb); |
1da177e4 | 128 | |
2c6292ae AV |
129 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIXACL) |
130 | sb->s_flags |= MS_POSIXACL; | |
131 | ||
2f6c9479 | 132 | if (tcon->ses->capabilities & tcon->ses->server->vals->cap_large_files) |
2c6292ae AV |
133 | sb->s_maxbytes = MAX_LFS_FILESIZE; |
134 | else | |
135 | sb->s_maxbytes = MAX_NON_LFS; | |
136 | ||
137 | /* BB FIXME fix time_gran to be larger for LANMAN sessions */ | |
138 | sb->s_time_gran = 100; | |
139 | ||
1da177e4 LT |
140 | sb->s_magic = CIFS_MAGIC_NUMBER; |
141 | sb->s_op = &cifs_super_ops; | |
8044f7f4 | 142 | sb->s_bdi = &cifs_sb->bdi; |
1da177e4 LT |
143 | sb->s_blocksize = CIFS_MAX_MSGSIZE; |
144 | sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */ | |
9b6763e0 | 145 | inode = cifs_root_iget(sb); |
1da177e4 | 146 | |
ce634ab2 DH |
147 | if (IS_ERR(inode)) { |
148 | rc = PTR_ERR(inode); | |
1da177e4 LT |
149 | goto out_no_root; |
150 | } | |
151 | ||
2f6c9479 | 152 | if (tcon->nocase) |
66ffd113 JL |
153 | sb->s_d_op = &cifs_ci_dentry_ops; |
154 | else | |
155 | sb->s_d_op = &cifs_dentry_ops; | |
156 | ||
48fde701 | 157 | sb->s_root = d_make_root(inode); |
1da177e4 LT |
158 | if (!sb->s_root) { |
159 | rc = -ENOMEM; | |
160 | goto out_no_root; | |
161 | } | |
50c2f753 | 162 | |
f3a6a60e | 163 | #ifdef CONFIG_CIFS_NFSD_EXPORT |
7521a3c5 | 164 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
f96637be | 165 | cifs_dbg(FYI, "export ops supported\n"); |
7521a3c5 SF |
166 | sb->s_export_op = &cifs_export_ops; |
167 | } | |
f3a6a60e | 168 | #endif /* CONFIG_CIFS_NFSD_EXPORT */ |
1da177e4 LT |
169 | |
170 | return 0; | |
171 | ||
172 | out_no_root: | |
f96637be | 173 | cifs_dbg(VFS, "%s: get root inode failed\n", __func__); |
1da177e4 LT |
174 | return rc; |
175 | } | |
176 | ||
6d686175 AV |
177 | static void cifs_kill_sb(struct super_block *sb) |
178 | { | |
179 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
180 | kill_anon_super(sb); | |
98ab494d | 181 | cifs_umount(cifs_sb); |
1da177e4 LT |
182 | } |
183 | ||
184 | static int | |
726c3342 | 185 | cifs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 186 | { |
726c3342 | 187 | struct super_block *sb = dentry->d_sb; |
39da9847 | 188 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
96daf2b0 | 189 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
76ec5e33 | 190 | struct TCP_Server_Info *server = tcon->ses->server; |
6d5786a3 | 191 | unsigned int xid; |
76ec5e33 | 192 | int rc = 0; |
1da177e4 | 193 | |
6d5786a3 | 194 | xid = get_xid(); |
1da177e4 | 195 | |
39da9847 SF |
196 | /* |
197 | * PATH_MAX may be too long - it would presumably be total path, | |
198 | * but note that some servers (includinng Samba 3) have a shorter | |
199 | * maximum path. | |
200 | * | |
201 | * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO. | |
202 | */ | |
203 | buf->f_namelen = PATH_MAX; | |
1da177e4 LT |
204 | buf->f_files = 0; /* undefined */ |
205 | buf->f_ffree = 0; /* unlimited */ | |
206 | ||
76ec5e33 PS |
207 | if (server->ops->queryfs) |
208 | rc = server->ops->queryfs(xid, tcon, buf); | |
39da9847 | 209 | |
6d5786a3 | 210 | free_xid(xid); |
39da9847 | 211 | return 0; |
1da177e4 LT |
212 | } |
213 | ||
10556cb2 | 214 | static int cifs_permission(struct inode *inode, int mask) |
1da177e4 LT |
215 | { |
216 | struct cifs_sb_info *cifs_sb; | |
217 | ||
218 | cifs_sb = CIFS_SB(inode->i_sb); | |
219 | ||
f696a365 MS |
220 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) { |
221 | if ((mask & MAY_EXEC) && !execute_ok(inode)) | |
222 | return -EACCES; | |
223 | else | |
224 | return 0; | |
225 | } else /* file mode might have been restricted at mount time | |
50c2f753 | 226 | on the client (above and beyond ACL on servers) for |
1da177e4 | 227 | servers which do not support setting and viewing mode bits, |
50c2f753 | 228 | so allowing client to check permissions is useful */ |
2830ba7f | 229 | return generic_permission(inode, mask); |
1da177e4 LT |
230 | } |
231 | ||
e18b890b CL |
232 | static struct kmem_cache *cifs_inode_cachep; |
233 | static struct kmem_cache *cifs_req_cachep; | |
234 | static struct kmem_cache *cifs_mid_cachep; | |
e18b890b | 235 | static struct kmem_cache *cifs_sm_req_cachep; |
1da177e4 LT |
236 | mempool_t *cifs_sm_req_poolp; |
237 | mempool_t *cifs_req_poolp; | |
238 | mempool_t *cifs_mid_poolp; | |
239 | ||
240 | static struct inode * | |
241 | cifs_alloc_inode(struct super_block *sb) | |
242 | { | |
243 | struct cifsInodeInfo *cifs_inode; | |
e94b1766 | 244 | cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
245 | if (!cifs_inode) |
246 | return NULL; | |
247 | cifs_inode->cifsAttrs = 0x20; /* default */ | |
1da177e4 | 248 | cifs_inode->time = 0; |
b8c32dbb PS |
249 | /* |
250 | * Until the file is open and we have gotten oplock info back from the | |
251 | * server, can not assume caching of file data or metadata. | |
252 | */ | |
c6723628 | 253 | cifs_set_oplock_level(cifs_inode, 0); |
aff8d5ca | 254 | cifs_inode->flags = 0; |
c11f1df5 SP |
255 | spin_lock_init(&cifs_inode->writers_lock); |
256 | cifs_inode->writers = 0; | |
1da177e4 | 257 | cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */ |
fbec9ab9 | 258 | cifs_inode->server_eof = 0; |
20054bd6 JL |
259 | cifs_inode->uniqueid = 0; |
260 | cifs_inode->createtime = 0; | |
42873b0a | 261 | cifs_inode->epoch = 0; |
b8c32dbb PS |
262 | #ifdef CONFIG_CIFS_SMB2 |
263 | get_random_bytes(cifs_inode->lease_key, SMB2_LEASE_KEY_SIZE); | |
264 | #endif | |
265 | /* | |
266 | * Can not set i_flags here - they get immediately overwritten to zero | |
267 | * by the VFS. | |
268 | */ | |
269 | /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME; */ | |
1da177e4 | 270 | INIT_LIST_HEAD(&cifs_inode->openFileList); |
f45d3416 | 271 | INIT_LIST_HEAD(&cifs_inode->llist); |
1da177e4 LT |
272 | return &cifs_inode->vfs_inode; |
273 | } | |
274 | ||
fa0d7e3d NP |
275 | static void cifs_i_callback(struct rcu_head *head) |
276 | { | |
277 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
fa0d7e3d NP |
278 | kmem_cache_free(cifs_inode_cachep, CIFS_I(inode)); |
279 | } | |
280 | ||
1da177e4 LT |
281 | static void |
282 | cifs_destroy_inode(struct inode *inode) | |
283 | { | |
fa0d7e3d | 284 | call_rcu(&inode->i_rcu, cifs_i_callback); |
1da177e4 LT |
285 | } |
286 | ||
9451a9a5 | 287 | static void |
b57922d9 | 288 | cifs_evict_inode(struct inode *inode) |
9451a9a5 | 289 | { |
91b0abe3 | 290 | truncate_inode_pages_final(&inode->i_data); |
dbd5768f | 291 | clear_inode(inode); |
9451a9a5 SJ |
292 | cifs_fscache_release_inode_cookie(inode); |
293 | } | |
294 | ||
61f98ffd JL |
295 | static void |
296 | cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server) | |
297 | { | |
a9f1b85e PS |
298 | struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr; |
299 | struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr; | |
300 | ||
61f98ffd JL |
301 | seq_printf(s, ",addr="); |
302 | ||
a9f1b85e | 303 | switch (server->dstaddr.ss_family) { |
61f98ffd | 304 | case AF_INET: |
a9f1b85e | 305 | seq_printf(s, "%pI4", &sa->sin_addr.s_addr); |
61f98ffd JL |
306 | break; |
307 | case AF_INET6: | |
a9f1b85e PS |
308 | seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr); |
309 | if (sa6->sin6_scope_id) | |
310 | seq_printf(s, "%%%u", sa6->sin6_scope_id); | |
61f98ffd JL |
311 | break; |
312 | default: | |
313 | seq_printf(s, "(unknown)"); | |
314 | } | |
315 | } | |
316 | ||
3e715513 | 317 | static void |
28e11bd8 | 318 | cifs_show_security(struct seq_file *s, struct cifs_ses *ses) |
3e715513 | 319 | { |
28e11bd8 JL |
320 | if (ses->sectype == Unspecified) |
321 | return; | |
322 | ||
3e715513 JL |
323 | seq_printf(s, ",sec="); |
324 | ||
28e11bd8 | 325 | switch (ses->sectype) { |
3e715513 JL |
326 | case LANMAN: |
327 | seq_printf(s, "lanman"); | |
328 | break; | |
329 | case NTLMv2: | |
330 | seq_printf(s, "ntlmv2"); | |
331 | break; | |
332 | case NTLM: | |
333 | seq_printf(s, "ntlm"); | |
334 | break; | |
335 | case Kerberos: | |
336 | seq_printf(s, "krb5"); | |
337 | break; | |
338 | case RawNTLMSSP: | |
339 | seq_printf(s, "ntlmssp"); | |
340 | break; | |
341 | default: | |
342 | /* shouldn't ever happen */ | |
343 | seq_printf(s, "unknown"); | |
344 | break; | |
345 | } | |
346 | ||
28e11bd8 | 347 | if (ses->sign) |
3e715513 JL |
348 | seq_printf(s, "i"); |
349 | } | |
350 | ||
d06b5056 JL |
351 | static void |
352 | cifs_show_cache_flavor(struct seq_file *s, struct cifs_sb_info *cifs_sb) | |
353 | { | |
354 | seq_printf(s, ",cache="); | |
355 | ||
356 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO) | |
357 | seq_printf(s, "strict"); | |
358 | else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) | |
359 | seq_printf(s, "none"); | |
360 | else | |
361 | seq_printf(s, "loose"); | |
362 | } | |
363 | ||
3ae35cde JL |
364 | static void |
365 | cifs_show_nls(struct seq_file *s, struct nls_table *cur) | |
366 | { | |
367 | struct nls_table *def; | |
368 | ||
369 | /* Display iocharset= option if it's not default charset */ | |
370 | def = load_nls_default(); | |
371 | if (def != cur) | |
372 | seq_printf(s, ",iocharset=%s", cur->charset); | |
373 | unload_nls(def); | |
374 | } | |
375 | ||
1da177e4 LT |
376 | /* |
377 | * cifs_show_options() is for displaying mount options in /proc/mounts. | |
378 | * Not all settable options are displayed but most of the important | |
379 | * ones are. | |
380 | */ | |
381 | static int | |
34c80b1d | 382 | cifs_show_options(struct seq_file *s, struct dentry *root) |
1da177e4 | 383 | { |
34c80b1d | 384 | struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb); |
96daf2b0 | 385 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
3eb9a889 BG |
386 | struct sockaddr *srcaddr; |
387 | srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr; | |
8616e0fc | 388 | |
23db65f5 | 389 | seq_printf(s, ",vers=%s", tcon->ses->server->vals->version_string); |
28e11bd8 | 390 | cifs_show_security(s, tcon->ses); |
d06b5056 | 391 | cifs_show_cache_flavor(s, cifs_sb); |
3e715513 | 392 | |
29e07c82 JL |
393 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) |
394 | seq_printf(s, ",multiuser"); | |
8727c8a8 SF |
395 | else if (tcon->ses->user_name) |
396 | seq_printf(s, ",username=%s", tcon->ses->user_name); | |
29e07c82 | 397 | |
8616e0fc JL |
398 | if (tcon->ses->domainName) |
399 | seq_printf(s, ",domain=%s", tcon->ses->domainName); | |
400 | ||
3eb9a889 BG |
401 | if (srcaddr->sa_family != AF_UNSPEC) { |
402 | struct sockaddr_in *saddr4; | |
403 | struct sockaddr_in6 *saddr6; | |
404 | saddr4 = (struct sockaddr_in *)srcaddr; | |
405 | saddr6 = (struct sockaddr_in6 *)srcaddr; | |
406 | if (srcaddr->sa_family == AF_INET6) | |
407 | seq_printf(s, ",srcaddr=%pI6c", | |
408 | &saddr6->sin6_addr); | |
409 | else if (srcaddr->sa_family == AF_INET) | |
410 | seq_printf(s, ",srcaddr=%pI4", | |
411 | &saddr4->sin_addr.s_addr); | |
412 | else | |
413 | seq_printf(s, ",srcaddr=BAD-AF:%i", | |
414 | (int)(srcaddr->sa_family)); | |
415 | } | |
416 | ||
1f68233c EB |
417 | seq_printf(s, ",uid=%u", |
418 | from_kuid_munged(&init_user_ns, cifs_sb->mnt_uid)); | |
340481a3 JL |
419 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) |
420 | seq_printf(s, ",forceuid"); | |
4486d6ed JL |
421 | else |
422 | seq_printf(s, ",noforceuid"); | |
340481a3 | 423 | |
1f68233c EB |
424 | seq_printf(s, ",gid=%u", |
425 | from_kgid_munged(&init_user_ns, cifs_sb->mnt_gid)); | |
340481a3 JL |
426 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) |
427 | seq_printf(s, ",forcegid"); | |
4486d6ed JL |
428 | else |
429 | seq_printf(s, ",noforcegid"); | |
8616e0fc | 430 | |
61f98ffd | 431 | cifs_show_address(s, tcon->ses->server); |
1da177e4 | 432 | |
8616e0fc | 433 | if (!tcon->unix_ext) |
5206efd6 | 434 | seq_printf(s, ",file_mode=0%ho,dir_mode=0%ho", |
2b280fab SF |
435 | cifs_sb->mnt_file_mode, |
436 | cifs_sb->mnt_dir_mode); | |
3ae35cde JL |
437 | |
438 | cifs_show_nls(s, cifs_sb->local_nls); | |
439 | ||
8616e0fc JL |
440 | if (tcon->seal) |
441 | seq_printf(s, ",seal"); | |
442 | if (tcon->nocase) | |
443 | seq_printf(s, ",nocase"); | |
444 | if (tcon->retry) | |
445 | seq_printf(s, ",hard"); | |
d4ffff1f PS |
446 | if (tcon->unix_ext) |
447 | seq_printf(s, ",unix"); | |
448 | else | |
449 | seq_printf(s, ",nounix"); | |
8616e0fc JL |
450 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) |
451 | seq_printf(s, ",posixpaths"); | |
452 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) | |
453 | seq_printf(s, ",setuids"); | |
454 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) | |
455 | seq_printf(s, ",serverino"); | |
d4ffff1f PS |
456 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD) |
457 | seq_printf(s, ",rwpidforward"); | |
458 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) | |
459 | seq_printf(s, ",forcemand"); | |
8616e0fc JL |
460 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) |
461 | seq_printf(s, ",nouser_xattr"); | |
462 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR) | |
463 | seq_printf(s, ",mapchars"); | |
464 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) | |
465 | seq_printf(s, ",sfu"); | |
466 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
467 | seq_printf(s, ",nobrl"); | |
468 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) | |
469 | seq_printf(s, ",cifsacl"); | |
470 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) | |
471 | seq_printf(s, ",dynperm"); | |
34c80b1d | 472 | if (root->d_sb->s_flags & MS_POSIXACL) |
8616e0fc | 473 | seq_printf(s, ",acl"); |
736a3320 SM |
474 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) |
475 | seq_printf(s, ",mfsymlinks"); | |
476428f8 SJ |
476 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE) |
477 | seq_printf(s, ",fsc"); | |
71c424ba SF |
478 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC) |
479 | seq_printf(s, ",nostrictsync"); | |
480 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) | |
481 | seq_printf(s, ",noperm"); | |
3c7c87fd | 482 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPUID) |
1f68233c EB |
483 | seq_printf(s, ",backupuid=%u", |
484 | from_kuid_munged(&init_user_ns, | |
485 | cifs_sb->mnt_backupuid)); | |
3c7c87fd | 486 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPGID) |
1f68233c EB |
487 | seq_printf(s, ",backupgid=%u", |
488 | from_kgid_munged(&init_user_ns, | |
489 | cifs_sb->mnt_backupgid)); | |
8616e0fc | 490 | |
28f88810 SP |
491 | seq_printf(s, ",rsize=%u", cifs_sb->rsize); |
492 | seq_printf(s, ",wsize=%u", cifs_sb->wsize); | |
6d20e840 | 493 | /* convert actimeo and display it in seconds */ |
156d1790 | 494 | seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ); |
8616e0fc | 495 | |
1da177e4 LT |
496 | return 0; |
497 | } | |
498 | ||
42faad99 | 499 | static void cifs_umount_begin(struct super_block *sb) |
68058e75 | 500 | { |
42faad99 | 501 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
96daf2b0 | 502 | struct cifs_tcon *tcon; |
68058e75 | 503 | |
4523cc30 | 504 | if (cifs_sb == NULL) |
9e2e85f8 SF |
505 | return; |
506 | ||
0d424ad0 | 507 | tcon = cifs_sb_master_tcon(cifs_sb); |
f1987b44 | 508 | |
3f9bcca7 | 509 | spin_lock(&cifs_tcp_ses_lock); |
ad8034f1 SF |
510 | if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) { |
511 | /* we have other mounts to same share or we have | |
512 | already tried to force umount this and woken up | |
513 | all waiting network requests, nothing to do */ | |
3f9bcca7 | 514 | spin_unlock(&cifs_tcp_ses_lock); |
ad8034f1 SF |
515 | return; |
516 | } else if (tcon->tc_count == 1) | |
5e1253b5 | 517 | tcon->tidStatus = CifsExiting; |
3f9bcca7 | 518 | spin_unlock(&cifs_tcp_ses_lock); |
5e1253b5 | 519 | |
3a5ff61c | 520 | /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */ |
7b7abfe3 | 521 | /* cancel_notify_requests(tcon); */ |
50c2f753 | 522 | if (tcon->ses && tcon->ses->server) { |
f96637be | 523 | cifs_dbg(FYI, "wake up tasks now - umount begin not complete\n"); |
9e2e85f8 | 524 | wake_up_all(&tcon->ses->server->request_q); |
6ab16d24 SF |
525 | wake_up_all(&tcon->ses->server->response_q); |
526 | msleep(1); /* yield */ | |
527 | /* we have to kick the requests once more */ | |
528 | wake_up_all(&tcon->ses->server->response_q); | |
529 | msleep(1); | |
5e1253b5 | 530 | } |
68058e75 SF |
531 | |
532 | return; | |
533 | } | |
68058e75 | 534 | |
bf97d287 | 535 | #ifdef CONFIG_CIFS_STATS2 |
64132379 | 536 | static int cifs_show_stats(struct seq_file *s, struct dentry *root) |
bf97d287 SF |
537 | { |
538 | /* BB FIXME */ | |
539 | return 0; | |
540 | } | |
541 | #endif | |
542 | ||
1da177e4 LT |
543 | static int cifs_remount(struct super_block *sb, int *flags, char *data) |
544 | { | |
02b9984d | 545 | sync_filesystem(sb); |
1da177e4 LT |
546 | *flags |= MS_NODIRATIME; |
547 | return 0; | |
548 | } | |
549 | ||
45321ac5 | 550 | static int cifs_drop_inode(struct inode *inode) |
12420ac3 JL |
551 | { |
552 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
553 | ||
45321ac5 AV |
554 | /* no serverino => unconditional eviction */ |
555 | return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) || | |
556 | generic_drop_inode(inode); | |
12420ac3 JL |
557 | } |
558 | ||
ee9b6d61 | 559 | static const struct super_operations cifs_super_ops = { |
1da177e4 LT |
560 | .statfs = cifs_statfs, |
561 | .alloc_inode = cifs_alloc_inode, | |
562 | .destroy_inode = cifs_destroy_inode, | |
12420ac3 | 563 | .drop_inode = cifs_drop_inode, |
b57922d9 | 564 | .evict_inode = cifs_evict_inode, |
12420ac3 JL |
565 | /* .delete_inode = cifs_delete_inode, */ /* Do not need above |
566 | function unless later we add lazy close of inodes or unless the | |
50c2f753 SF |
567 | kernel forgets to call us with the same number of releases (closes) |
568 | as opens */ | |
1da177e4 | 569 | .show_options = cifs_show_options, |
7b7abfe3 | 570 | .umount_begin = cifs_umount_begin, |
1da177e4 | 571 | .remount_fs = cifs_remount, |
bf97d287 | 572 | #ifdef CONFIG_CIFS_STATS2 |
f46d3e11 | 573 | .show_stats = cifs_show_stats, |
bf97d287 | 574 | #endif |
1da177e4 LT |
575 | }; |
576 | ||
f87d39d9 SF |
577 | /* |
578 | * Get root dentry from superblock according to prefix path mount option. | |
579 | * Return dentry with refcount + 1 on success and NULL otherwise. | |
580 | */ | |
581 | static struct dentry * | |
582 | cifs_get_root(struct smb_vol *vol, struct super_block *sb) | |
583 | { | |
fec11dd9 | 584 | struct dentry *dentry; |
f87d39d9 | 585 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
fec11dd9 AV |
586 | char *full_path = NULL; |
587 | char *s, *p; | |
f87d39d9 SF |
588 | char sep; |
589 | ||
6d3ea7e4 SF |
590 | full_path = cifs_build_path_to_root(vol, cifs_sb, |
591 | cifs_sb_master_tcon(cifs_sb)); | |
f87d39d9 | 592 | if (full_path == NULL) |
9403c9c5 | 593 | return ERR_PTR(-ENOMEM); |
f87d39d9 | 594 | |
f96637be | 595 | cifs_dbg(FYI, "Get root dentry for %s\n", full_path); |
f87d39d9 | 596 | |
f87d39d9 | 597 | sep = CIFS_DIR_SEP(cifs_sb); |
fec11dd9 AV |
598 | dentry = dget(sb->s_root); |
599 | p = s = full_path; | |
600 | ||
601 | do { | |
602 | struct inode *dir = dentry->d_inode; | |
603 | struct dentry *child; | |
604 | ||
5b980b01 PS |
605 | if (!dir) { |
606 | dput(dentry); | |
607 | dentry = ERR_PTR(-ENOENT); | |
608 | break; | |
609 | } | |
ce2ac521 JL |
610 | if (!S_ISDIR(dir->i_mode)) { |
611 | dput(dentry); | |
612 | dentry = ERR_PTR(-ENOTDIR); | |
613 | break; | |
614 | } | |
5b980b01 | 615 | |
fec11dd9 AV |
616 | /* skip separators */ |
617 | while (*s == sep) | |
618 | s++; | |
619 | if (!*s) | |
620 | break; | |
621 | p = s++; | |
622 | /* next separator */ | |
623 | while (*s && *s != sep) | |
624 | s++; | |
625 | ||
626 | mutex_lock(&dir->i_mutex); | |
627 | child = lookup_one_len(p, dentry, s - p); | |
628 | mutex_unlock(&dir->i_mutex); | |
629 | dput(dentry); | |
630 | dentry = child; | |
631 | } while (!IS_ERR(dentry)); | |
f87d39d9 | 632 | kfree(full_path); |
fec11dd9 | 633 | return dentry; |
f87d39d9 SF |
634 | } |
635 | ||
ee01a14d AV |
636 | static int cifs_set_super(struct super_block *sb, void *data) |
637 | { | |
638 | struct cifs_mnt_data *mnt_data = data; | |
639 | sb->s_fs_info = mnt_data->cifs_sb; | |
640 | return set_anon_super(sb, NULL); | |
641 | } | |
642 | ||
d753ed97 AV |
643 | static struct dentry * |
644 | cifs_do_mount(struct file_system_type *fs_type, | |
724d9f1c | 645 | int flags, const char *dev_name, void *data) |
1da177e4 LT |
646 | { |
647 | int rc; | |
db719222 | 648 | struct super_block *sb; |
724d9f1c PS |
649 | struct cifs_sb_info *cifs_sb; |
650 | struct smb_vol *volume_info; | |
25c7f41e | 651 | struct cifs_mnt_data mnt_data; |
724d9f1c | 652 | struct dentry *root; |
1da177e4 | 653 | |
f96637be | 654 | cifs_dbg(FYI, "Devname: %s flags: %d\n", dev_name, flags); |
1da177e4 | 655 | |
04db79b0 JL |
656 | volume_info = cifs_get_volume_info((char *)data, dev_name); |
657 | if (IS_ERR(volume_info)) | |
658 | return ERR_CAST(volume_info); | |
724d9f1c PS |
659 | |
660 | cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL); | |
661 | if (cifs_sb == NULL) { | |
662 | root = ERR_PTR(-ENOMEM); | |
5c4f1ad7 | 663 | goto out_nls; |
724d9f1c PS |
664 | } |
665 | ||
5d3bc605 AV |
666 | cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL); |
667 | if (cifs_sb->mountdata == NULL) { | |
668 | root = ERR_PTR(-ENOMEM); | |
5c4f1ad7 | 669 | goto out_cifs_sb; |
5d3bc605 AV |
670 | } |
671 | ||
724d9f1c PS |
672 | cifs_setup_cifs_sb(volume_info, cifs_sb); |
673 | ||
97d1152a AV |
674 | rc = cifs_mount(cifs_sb, volume_info); |
675 | if (rc) { | |
676 | if (!(flags & MS_SILENT)) | |
f96637be JP |
677 | cifs_dbg(VFS, "cifs_mount failed w/return code = %d\n", |
678 | rc); | |
97d1152a | 679 | root = ERR_PTR(rc); |
5c4f1ad7 | 680 | goto out_mountdata; |
97d1152a AV |
681 | } |
682 | ||
25c7f41e PS |
683 | mnt_data.vol = volume_info; |
684 | mnt_data.cifs_sb = cifs_sb; | |
685 | mnt_data.flags = flags; | |
686 | ||
9249e17f DH |
687 | /* BB should we make this contingent on mount parm? */ |
688 | flags |= MS_NODIRATIME | MS_NOATIME; | |
689 | ||
690 | sb = sget(fs_type, cifs_match_super, cifs_set_super, flags, &mnt_data); | |
724d9f1c | 691 | if (IS_ERR(sb)) { |
724d9f1c | 692 | root = ERR_CAST(sb); |
97d1152a | 693 | cifs_umount(cifs_sb); |
d757d71b | 694 | goto out; |
724d9f1c | 695 | } |
1da177e4 | 696 | |
ee01a14d | 697 | if (sb->s_root) { |
f96637be | 698 | cifs_dbg(FYI, "Use existing superblock\n"); |
97d1152a | 699 | cifs_umount(cifs_sb); |
5c4f1ad7 | 700 | } else { |
5c4f1ad7 AV |
701 | rc = cifs_read_super(sb); |
702 | if (rc) { | |
703 | root = ERR_PTR(rc); | |
704 | goto out_super; | |
705 | } | |
b2e5cd33 | 706 | |
5c4f1ad7 | 707 | sb->s_flags |= MS_ACTIVE; |
1da177e4 | 708 | } |
724d9f1c | 709 | |
f87d39d9 | 710 | root = cifs_get_root(volume_info, sb); |
9403c9c5 | 711 | if (IS_ERR(root)) |
f87d39d9 | 712 | goto out_super; |
25c7f41e | 713 | |
f96637be | 714 | cifs_dbg(FYI, "dentry root is: %p\n", root); |
641a58d6 | 715 | goto out; |
724d9f1c | 716 | |
641a58d6 | 717 | out_super: |
641a58d6 | 718 | deactivate_locked_super(sb); |
641a58d6 | 719 | out: |
f9e59bcb | 720 | cifs_cleanup_volume_info(volume_info); |
724d9f1c | 721 | return root; |
5c4f1ad7 AV |
722 | |
723 | out_mountdata: | |
724 | kfree(cifs_sb->mountdata); | |
725 | out_cifs_sb: | |
726 | kfree(cifs_sb); | |
727 | out_nls: | |
728 | unload_nls(volume_info->local_nls); | |
729 | goto out; | |
1da177e4 LT |
730 | } |
731 | ||
027445c3 BP |
732 | static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov, |
733 | unsigned long nr_segs, loff_t pos) | |
1da177e4 | 734 | { |
496ad9aa | 735 | struct inode *inode = file_inode(iocb->ki_filp); |
c11f1df5 | 736 | struct cifsInodeInfo *cinode = CIFS_I(inode); |
1da177e4 | 737 | ssize_t written; |
72432ffc | 738 | int rc; |
1da177e4 | 739 | |
c11f1df5 SP |
740 | written = cifs_get_writer(cinode); |
741 | if (written) | |
742 | return written; | |
743 | ||
027445c3 | 744 | written = generic_file_aio_write(iocb, iov, nr_segs, pos); |
72432ffc | 745 | |
18cceb6a | 746 | if (CIFS_CACHE_WRITE(CIFS_I(inode))) |
c11f1df5 | 747 | goto out; |
72432ffc PS |
748 | |
749 | rc = filemap_fdatawrite(inode->i_mapping); | |
750 | if (rc) | |
f96637be JP |
751 | cifs_dbg(FYI, "cifs_file_aio_write: %d rc on %p inode\n", |
752 | rc, inode); | |
72432ffc | 753 | |
c11f1df5 SP |
754 | out: |
755 | cifs_put_writer(cinode); | |
1da177e4 LT |
756 | return written; |
757 | } | |
758 | ||
965c8e59 | 759 | static loff_t cifs_llseek(struct file *file, loff_t offset, int whence) |
c32a0b68 | 760 | { |
06222e49 | 761 | /* |
965c8e59 | 762 | * whence == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate |
06222e49 JB |
763 | * the cached file length |
764 | */ | |
965c8e59 | 765 | if (whence != SEEK_SET && whence != SEEK_CUR) { |
6feb9891 | 766 | int rc; |
496ad9aa | 767 | struct inode *inode = file_inode(file); |
6feb9891 PS |
768 | |
769 | /* | |
770 | * We need to be sure that all dirty pages are written and the | |
771 | * server has the newest file length. | |
772 | */ | |
18cceb6a | 773 | if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping && |
6feb9891 PS |
774 | inode->i_mapping->nrpages != 0) { |
775 | rc = filemap_fdatawait(inode->i_mapping); | |
156ecb2d SF |
776 | if (rc) { |
777 | mapping_set_error(inode->i_mapping, rc); | |
778 | return rc; | |
779 | } | |
6feb9891 PS |
780 | } |
781 | /* | |
782 | * Some applications poll for the file length in this strange | |
783 | * way so we must seek to end on non-oplocked files by | |
784 | * setting the revalidate time to zero. | |
785 | */ | |
786 | CIFS_I(inode)->time = 0; | |
787 | ||
788 | rc = cifs_revalidate_file_attr(file); | |
789 | if (rc < 0) | |
790 | return (loff_t)rc; | |
c32a0b68 | 791 | } |
965c8e59 | 792 | return generic_file_llseek(file, offset, whence); |
c32a0b68 SF |
793 | } |
794 | ||
84210e91 SF |
795 | static int cifs_setlease(struct file *file, long arg, struct file_lock **lease) |
796 | { | |
18cceb6a PS |
797 | /* |
798 | * Note that this is called by vfs setlease with i_lock held to | |
799 | * protect *lease from going away. | |
800 | */ | |
496ad9aa | 801 | struct inode *inode = file_inode(file); |
ba00ba64 | 802 | struct cifsFileInfo *cfile = file->private_data; |
84210e91 SF |
803 | |
804 | if (!(S_ISREG(inode->i_mode))) | |
805 | return -EINVAL; | |
806 | ||
807 | /* check if file is oplocked */ | |
18cceb6a PS |
808 | if (((arg == F_RDLCK) && CIFS_CACHE_READ(CIFS_I(inode))) || |
809 | ((arg == F_WRLCK) && CIFS_CACHE_WRITE(CIFS_I(inode)))) | |
84210e91 | 810 | return generic_setlease(file, arg, lease); |
13cfb733 | 811 | else if (tlink_tcon(cfile->tlink)->local_lease && |
18cceb6a PS |
812 | !CIFS_CACHE_READ(CIFS_I(inode))) |
813 | /* | |
814 | * If the server claims to support oplock on this file, then we | |
815 | * still need to check oplock even if the local_lease mount | |
816 | * option is set, but there are servers which do not support | |
817 | * oplock for which this mount option may be useful if the user | |
818 | * knows that the file won't be changed on the server by anyone | |
819 | * else. | |
820 | */ | |
84210e91 | 821 | return generic_setlease(file, arg, lease); |
51ee4b84 | 822 | else |
84210e91 SF |
823 | return -EAGAIN; |
824 | } | |
84210e91 | 825 | |
e6ab1582 | 826 | struct file_system_type cifs_fs_type = { |
1da177e4 LT |
827 | .owner = THIS_MODULE, |
828 | .name = "cifs", | |
d753ed97 | 829 | .mount = cifs_do_mount, |
6d686175 | 830 | .kill_sb = cifs_kill_sb, |
1da177e4 LT |
831 | /* .fs_flags */ |
832 | }; | |
3e64fe5b | 833 | MODULE_ALIAS_FS("cifs"); |
754661f1 | 834 | const struct inode_operations cifs_dir_inode_ops = { |
1da177e4 | 835 | .create = cifs_create, |
d2c12719 | 836 | .atomic_open = cifs_atomic_open, |
1da177e4 LT |
837 | .lookup = cifs_lookup, |
838 | .getattr = cifs_getattr, | |
839 | .unlink = cifs_unlink, | |
840 | .link = cifs_hardlink, | |
841 | .mkdir = cifs_mkdir, | |
842 | .rmdir = cifs_rmdir, | |
843 | .rename = cifs_rename, | |
844 | .permission = cifs_permission, | |
845 | /* revalidate:cifs_revalidate, */ | |
846 | .setattr = cifs_setattr, | |
847 | .symlink = cifs_symlink, | |
848 | .mknod = cifs_mknod, | |
849 | #ifdef CONFIG_CIFS_XATTR | |
850 | .setxattr = cifs_setxattr, | |
851 | .getxattr = cifs_getxattr, | |
852 | .listxattr = cifs_listxattr, | |
853 | .removexattr = cifs_removexattr, | |
854 | #endif | |
855 | }; | |
856 | ||
754661f1 | 857 | const struct inode_operations cifs_file_inode_ops = { |
1da177e4 LT |
858 | /* revalidate:cifs_revalidate, */ |
859 | .setattr = cifs_setattr, | |
860 | .getattr = cifs_getattr, /* do we need this anymore? */ | |
1da177e4 LT |
861 | .permission = cifs_permission, |
862 | #ifdef CONFIG_CIFS_XATTR | |
863 | .setxattr = cifs_setxattr, | |
864 | .getxattr = cifs_getxattr, | |
865 | .listxattr = cifs_listxattr, | |
866 | .removexattr = cifs_removexattr, | |
50c2f753 | 867 | #endif |
1da177e4 LT |
868 | }; |
869 | ||
754661f1 | 870 | const struct inode_operations cifs_symlink_inode_ops = { |
50c2f753 | 871 | .readlink = generic_readlink, |
1da177e4 | 872 | .follow_link = cifs_follow_link, |
87dc800b | 873 | .put_link = kfree_put_link, |
1da177e4 LT |
874 | .permission = cifs_permission, |
875 | /* BB add the following two eventually */ | |
876 | /* revalidate: cifs_revalidate, | |
877 | setattr: cifs_notify_change, *//* BB do we need notify change */ | |
878 | #ifdef CONFIG_CIFS_XATTR | |
879 | .setxattr = cifs_setxattr, | |
880 | .getxattr = cifs_getxattr, | |
881 | .listxattr = cifs_listxattr, | |
882 | .removexattr = cifs_removexattr, | |
50c2f753 | 883 | #endif |
1da177e4 LT |
884 | }; |
885 | ||
4b6f5d20 | 886 | const struct file_operations cifs_file_ops = { |
87c89dd7 SF |
887 | .read = do_sync_read, |
888 | .write = do_sync_write, | |
87c89dd7 SF |
889 | .aio_read = generic_file_aio_read, |
890 | .aio_write = cifs_file_aio_write, | |
1da177e4 LT |
891 | .open = cifs_open, |
892 | .release = cifs_close, | |
893 | .lock = cifs_lock, | |
894 | .fsync = cifs_fsync, | |
895 | .flush = cifs_flush, | |
896 | .mmap = cifs_file_mmap, | |
5ffc4ef4 | 897 | .splice_read = generic_file_splice_read, |
c32a0b68 | 898 | .llseek = cifs_llseek, |
c67593a0 | 899 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 900 | .unlocked_ioctl = cifs_ioctl, |
c67593a0 | 901 | #endif /* CONFIG_CIFS_POSIX */ |
84210e91 | 902 | .setlease = cifs_setlease, |
1da177e4 LT |
903 | }; |
904 | ||
8be7e6ba PS |
905 | const struct file_operations cifs_file_strict_ops = { |
906 | .read = do_sync_read, | |
907 | .write = do_sync_write, | |
a70307ee | 908 | .aio_read = cifs_strict_readv, |
72432ffc | 909 | .aio_write = cifs_strict_writev, |
8be7e6ba PS |
910 | .open = cifs_open, |
911 | .release = cifs_close, | |
912 | .lock = cifs_lock, | |
913 | .fsync = cifs_strict_fsync, | |
914 | .flush = cifs_flush, | |
7a6a19b1 | 915 | .mmap = cifs_file_strict_mmap, |
8be7e6ba PS |
916 | .splice_read = generic_file_splice_read, |
917 | .llseek = cifs_llseek, | |
918 | #ifdef CONFIG_CIFS_POSIX | |
919 | .unlocked_ioctl = cifs_ioctl, | |
920 | #endif /* CONFIG_CIFS_POSIX */ | |
921 | .setlease = cifs_setlease, | |
922 | }; | |
923 | ||
4b6f5d20 | 924 | const struct file_operations cifs_file_direct_ops = { |
0b81c1c4 PS |
925 | /* BB reevaluate whether they can be done with directio, no cache */ |
926 | .read = do_sync_read, | |
927 | .write = do_sync_write, | |
928 | .aio_read = cifs_user_readv, | |
929 | .aio_write = cifs_user_writev, | |
1da177e4 LT |
930 | .open = cifs_open, |
931 | .release = cifs_close, | |
932 | .lock = cifs_lock, | |
933 | .fsync = cifs_fsync, | |
934 | .flush = cifs_flush, | |
a994b8fa | 935 | .mmap = cifs_file_mmap, |
5ffc4ef4 | 936 | .splice_read = generic_file_splice_read, |
c67593a0 | 937 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 938 | .unlocked_ioctl = cifs_ioctl, |
c67593a0 | 939 | #endif /* CONFIG_CIFS_POSIX */ |
c32a0b68 | 940 | .llseek = cifs_llseek, |
84210e91 | 941 | .setlease = cifs_setlease, |
1da177e4 | 942 | }; |
8be7e6ba | 943 | |
4b6f5d20 | 944 | const struct file_operations cifs_file_nobrl_ops = { |
87c89dd7 SF |
945 | .read = do_sync_read, |
946 | .write = do_sync_write, | |
87c89dd7 SF |
947 | .aio_read = generic_file_aio_read, |
948 | .aio_write = cifs_file_aio_write, | |
949 | .open = cifs_open, | |
950 | .release = cifs_close, | |
951 | .fsync = cifs_fsync, | |
952 | .flush = cifs_flush, | |
953 | .mmap = cifs_file_mmap, | |
5ffc4ef4 | 954 | .splice_read = generic_file_splice_read, |
c32a0b68 | 955 | .llseek = cifs_llseek, |
8b94bcb9 | 956 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 957 | .unlocked_ioctl = cifs_ioctl, |
8b94bcb9 | 958 | #endif /* CONFIG_CIFS_POSIX */ |
84210e91 | 959 | .setlease = cifs_setlease, |
8b94bcb9 SF |
960 | }; |
961 | ||
8be7e6ba PS |
962 | const struct file_operations cifs_file_strict_nobrl_ops = { |
963 | .read = do_sync_read, | |
964 | .write = do_sync_write, | |
a70307ee | 965 | .aio_read = cifs_strict_readv, |
72432ffc | 966 | .aio_write = cifs_strict_writev, |
8be7e6ba PS |
967 | .open = cifs_open, |
968 | .release = cifs_close, | |
969 | .fsync = cifs_strict_fsync, | |
970 | .flush = cifs_flush, | |
7a6a19b1 | 971 | .mmap = cifs_file_strict_mmap, |
8be7e6ba PS |
972 | .splice_read = generic_file_splice_read, |
973 | .llseek = cifs_llseek, | |
974 | #ifdef CONFIG_CIFS_POSIX | |
975 | .unlocked_ioctl = cifs_ioctl, | |
976 | #endif /* CONFIG_CIFS_POSIX */ | |
977 | .setlease = cifs_setlease, | |
978 | }; | |
979 | ||
4b6f5d20 | 980 | const struct file_operations cifs_file_direct_nobrl_ops = { |
0b81c1c4 PS |
981 | /* BB reevaluate whether they can be done with directio, no cache */ |
982 | .read = do_sync_read, | |
983 | .write = do_sync_write, | |
984 | .aio_read = cifs_user_readv, | |
985 | .aio_write = cifs_user_writev, | |
87c89dd7 SF |
986 | .open = cifs_open, |
987 | .release = cifs_close, | |
988 | .fsync = cifs_fsync, | |
989 | .flush = cifs_flush, | |
810627a0 | 990 | .mmap = cifs_file_mmap, |
5ffc4ef4 | 991 | .splice_read = generic_file_splice_read, |
8b94bcb9 | 992 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 993 | .unlocked_ioctl = cifs_ioctl, |
8b94bcb9 | 994 | #endif /* CONFIG_CIFS_POSIX */ |
c32a0b68 | 995 | .llseek = cifs_llseek, |
84210e91 | 996 | .setlease = cifs_setlease, |
8b94bcb9 | 997 | }; |
1da177e4 | 998 | |
4b6f5d20 | 999 | const struct file_operations cifs_dir_ops = { |
be4ccdcc | 1000 | .iterate = cifs_readdir, |
1da177e4 LT |
1001 | .release = cifs_closedir, |
1002 | .read = generic_read_dir, | |
f9ddcca4 | 1003 | .unlocked_ioctl = cifs_ioctl, |
3222a3e5 | 1004 | .llseek = generic_file_llseek, |
1da177e4 LT |
1005 | }; |
1006 | ||
1007 | static void | |
51cc5068 | 1008 | cifs_init_once(void *inode) |
1da177e4 LT |
1009 | { |
1010 | struct cifsInodeInfo *cifsi = inode; | |
1011 | ||
a35afb83 | 1012 | inode_init_once(&cifsi->vfs_inode); |
1b4b55a1 | 1013 | init_rwsem(&cifsi->lock_sem); |
1da177e4 LT |
1014 | } |
1015 | ||
9ee108b2 | 1016 | static int __init |
1da177e4 LT |
1017 | cifs_init_inodecache(void) |
1018 | { | |
1019 | cifs_inode_cachep = kmem_cache_create("cifs_inode_cache", | |
26f57364 | 1020 | sizeof(struct cifsInodeInfo), |
fffb60f9 PJ |
1021 | 0, (SLAB_RECLAIM_ACCOUNT| |
1022 | SLAB_MEM_SPREAD), | |
20c2df83 | 1023 | cifs_init_once); |
1da177e4 LT |
1024 | if (cifs_inode_cachep == NULL) |
1025 | return -ENOMEM; | |
1026 | ||
1027 | return 0; | |
1028 | } | |
1029 | ||
1030 | static void | |
1031 | cifs_destroy_inodecache(void) | |
1032 | { | |
8c0a8537 KS |
1033 | /* |
1034 | * Make sure all delayed rcu free inodes are flushed before we | |
1035 | * destroy cache. | |
1036 | */ | |
1037 | rcu_barrier(); | |
1a1d92c1 | 1038 | kmem_cache_destroy(cifs_inode_cachep); |
1da177e4 LT |
1039 | } |
1040 | ||
1041 | static int | |
1042 | cifs_init_request_bufs(void) | |
1043 | { | |
3792c173 PS |
1044 | size_t max_hdr_size = MAX_CIFS_HDR_SIZE; |
1045 | #ifdef CONFIG_CIFS_SMB2 | |
1046 | /* | |
1047 | * SMB2 maximum header size is bigger than CIFS one - no problems to | |
1048 | * allocate some more bytes for CIFS. | |
1049 | */ | |
1050 | max_hdr_size = MAX_SMB2_HDR_SIZE; | |
1051 | #endif | |
4523cc30 | 1052 | if (CIFSMaxBufSize < 8192) { |
1da177e4 LT |
1053 | /* Buffer size can not be smaller than 2 * PATH_MAX since maximum |
1054 | Unicode path name has to fit in any SMB/CIFS path based frames */ | |
1055 | CIFSMaxBufSize = 8192; | |
1056 | } else if (CIFSMaxBufSize > 1024*127) { | |
1057 | CIFSMaxBufSize = 1024 * 127; | |
1058 | } else { | |
1059 | CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/ | |
1060 | } | |
f96637be JP |
1061 | /* |
1062 | cifs_dbg(VFS, "CIFSMaxBufSize %d 0x%x\n", | |
1063 | CIFSMaxBufSize, CIFSMaxBufSize); | |
1064 | */ | |
1da177e4 | 1065 | cifs_req_cachep = kmem_cache_create("cifs_request", |
3792c173 | 1066 | CIFSMaxBufSize + max_hdr_size, 0, |
20c2df83 | 1067 | SLAB_HWCACHE_ALIGN, NULL); |
1da177e4 LT |
1068 | if (cifs_req_cachep == NULL) |
1069 | return -ENOMEM; | |
1070 | ||
4523cc30 | 1071 | if (cifs_min_rcv < 1) |
1da177e4 LT |
1072 | cifs_min_rcv = 1; |
1073 | else if (cifs_min_rcv > 64) { | |
1074 | cifs_min_rcv = 64; | |
f96637be | 1075 | cifs_dbg(VFS, "cifs_min_rcv set to maximum (64)\n"); |
1da177e4 LT |
1076 | } |
1077 | ||
93d2341c MD |
1078 | cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv, |
1079 | cifs_req_cachep); | |
1da177e4 | 1080 | |
4523cc30 | 1081 | if (cifs_req_poolp == NULL) { |
1da177e4 LT |
1082 | kmem_cache_destroy(cifs_req_cachep); |
1083 | return -ENOMEM; | |
1084 | } | |
ec637e3f | 1085 | /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and |
1da177e4 LT |
1086 | almost all handle based requests (but not write response, nor is it |
1087 | sufficient for path based requests). A smaller size would have | |
50c2f753 | 1088 | been more efficient (compacting multiple slab items on one 4k page) |
1da177e4 LT |
1089 | for the case in which debug was on, but this larger size allows |
1090 | more SMBs to use small buffer alloc and is still much more | |
6dc0f87e | 1091 | efficient to alloc 1 per page off the slab compared to 17K (5page) |
1da177e4 LT |
1092 | alloc of large cifs buffers even when page debugging is on */ |
1093 | cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq", | |
6dc0f87e | 1094 | MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN, |
20c2df83 | 1095 | NULL); |
1da177e4 LT |
1096 | if (cifs_sm_req_cachep == NULL) { |
1097 | mempool_destroy(cifs_req_poolp); | |
1098 | kmem_cache_destroy(cifs_req_cachep); | |
6dc0f87e | 1099 | return -ENOMEM; |
1da177e4 LT |
1100 | } |
1101 | ||
4523cc30 | 1102 | if (cifs_min_small < 2) |
1da177e4 LT |
1103 | cifs_min_small = 2; |
1104 | else if (cifs_min_small > 256) { | |
1105 | cifs_min_small = 256; | |
f96637be | 1106 | cifs_dbg(FYI, "cifs_min_small set to maximum (256)\n"); |
1da177e4 LT |
1107 | } |
1108 | ||
93d2341c MD |
1109 | cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small, |
1110 | cifs_sm_req_cachep); | |
1da177e4 | 1111 | |
4523cc30 | 1112 | if (cifs_sm_req_poolp == NULL) { |
1da177e4 LT |
1113 | mempool_destroy(cifs_req_poolp); |
1114 | kmem_cache_destroy(cifs_req_cachep); | |
1115 | kmem_cache_destroy(cifs_sm_req_cachep); | |
1116 | return -ENOMEM; | |
1117 | } | |
1118 | ||
1119 | return 0; | |
1120 | } | |
1121 | ||
1122 | static void | |
1123 | cifs_destroy_request_bufs(void) | |
1124 | { | |
1125 | mempool_destroy(cifs_req_poolp); | |
1a1d92c1 | 1126 | kmem_cache_destroy(cifs_req_cachep); |
1da177e4 | 1127 | mempool_destroy(cifs_sm_req_poolp); |
1a1d92c1 | 1128 | kmem_cache_destroy(cifs_sm_req_cachep); |
1da177e4 LT |
1129 | } |
1130 | ||
1131 | static int | |
1132 | cifs_init_mids(void) | |
1133 | { | |
1134 | cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids", | |
26f57364 SF |
1135 | sizeof(struct mid_q_entry), 0, |
1136 | SLAB_HWCACHE_ALIGN, NULL); | |
1da177e4 LT |
1137 | if (cifs_mid_cachep == NULL) |
1138 | return -ENOMEM; | |
1139 | ||
93d2341c MD |
1140 | /* 3 is a reasonable minimum number of simultaneous operations */ |
1141 | cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep); | |
4523cc30 | 1142 | if (cifs_mid_poolp == NULL) { |
1da177e4 LT |
1143 | kmem_cache_destroy(cifs_mid_cachep); |
1144 | return -ENOMEM; | |
1145 | } | |
1146 | ||
1da177e4 LT |
1147 | return 0; |
1148 | } | |
1149 | ||
1150 | static void | |
1151 | cifs_destroy_mids(void) | |
1152 | { | |
1153 | mempool_destroy(cifs_mid_poolp); | |
1a1d92c1 | 1154 | kmem_cache_destroy(cifs_mid_cachep); |
1da177e4 LT |
1155 | } |
1156 | ||
1da177e4 LT |
1157 | static int __init |
1158 | init_cifs(void) | |
1159 | { | |
1160 | int rc = 0; | |
1da177e4 | 1161 | cifs_proc_init(); |
e7ddee90 | 1162 | INIT_LIST_HEAD(&cifs_tcp_ses_list); |
0eff0e26 | 1163 | #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */ |
4ca9c190 SF |
1164 | INIT_LIST_HEAD(&GlobalDnotifyReqList); |
1165 | INIT_LIST_HEAD(&GlobalDnotifyRsp_Q); | |
0eff0e26 | 1166 | #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */ |
1da177e4 LT |
1167 | /* |
1168 | * Initialize Global counters | |
1169 | */ | |
1170 | atomic_set(&sesInfoAllocCount, 0); | |
1171 | atomic_set(&tconInfoAllocCount, 0); | |
6dc0f87e | 1172 | atomic_set(&tcpSesAllocCount, 0); |
1da177e4 LT |
1173 | atomic_set(&tcpSesReconnectCount, 0); |
1174 | atomic_set(&tconInfoReconnectCount, 0); | |
1175 | ||
1176 | atomic_set(&bufAllocCount, 0); | |
4498eed5 SF |
1177 | atomic_set(&smBufAllocCount, 0); |
1178 | #ifdef CONFIG_CIFS_STATS2 | |
1179 | atomic_set(&totBufAllocCount, 0); | |
1180 | atomic_set(&totSmBufAllocCount, 0); | |
1181 | #endif /* CONFIG_CIFS_STATS2 */ | |
1182 | ||
1da177e4 LT |
1183 | atomic_set(&midCount, 0); |
1184 | GlobalCurrentXid = 0; | |
1185 | GlobalTotalActiveXid = 0; | |
1186 | GlobalMaxActiveXid = 0; | |
3f9bcca7 | 1187 | spin_lock_init(&cifs_tcp_ses_lock); |
4477288a | 1188 | spin_lock_init(&cifs_file_list_lock); |
1da177e4 LT |
1189 | spin_lock_init(&GlobalMid_Lock); |
1190 | ||
b8c32dbb PS |
1191 | #ifdef CONFIG_CIFS_SMB2 |
1192 | get_random_bytes(cifs_client_guid, SMB2_CLIENT_GUID_SIZE); | |
1193 | #endif | |
1194 | ||
4523cc30 | 1195 | if (cifs_max_pending < 2) { |
1da177e4 | 1196 | cifs_max_pending = 2; |
f96637be | 1197 | cifs_dbg(FYI, "cifs_max_pending set to min of 2\n"); |
10b9b98e PS |
1198 | } else if (cifs_max_pending > CIFS_MAX_REQ) { |
1199 | cifs_max_pending = CIFS_MAX_REQ; | |
f96637be JP |
1200 | cifs_dbg(FYI, "cifs_max_pending set to max of %u\n", |
1201 | CIFS_MAX_REQ); | |
1da177e4 LT |
1202 | } |
1203 | ||
da472fc8 JL |
1204 | cifsiod_wq = alloc_workqueue("cifsiod", WQ_FREEZABLE|WQ_MEM_RECLAIM, 0); |
1205 | if (!cifsiod_wq) { | |
1206 | rc = -ENOMEM; | |
1207 | goto out_clean_proc; | |
1208 | } | |
1209 | ||
f579cf3c SJ |
1210 | rc = cifs_fscache_register(); |
1211 | if (rc) | |
da472fc8 | 1212 | goto out_destroy_wq; |
f579cf3c | 1213 | |
1da177e4 | 1214 | rc = cifs_init_inodecache(); |
45af7a0f | 1215 | if (rc) |
d3bf5221 | 1216 | goto out_unreg_fscache; |
45af7a0f SF |
1217 | |
1218 | rc = cifs_init_mids(); | |
1219 | if (rc) | |
1220 | goto out_destroy_inodecache; | |
1221 | ||
1222 | rc = cifs_init_request_bufs(); | |
1223 | if (rc) | |
1224 | goto out_destroy_mids; | |
1225 | ||
84a15b93 JL |
1226 | #ifdef CONFIG_CIFS_UPCALL |
1227 | rc = register_key_type(&cifs_spnego_key_type); | |
1228 | if (rc) | |
4d79dba0 SP |
1229 | goto out_destroy_request_bufs; |
1230 | #endif /* CONFIG_CIFS_UPCALL */ | |
1231 | ||
1232 | #ifdef CONFIG_CIFS_ACL | |
1233 | rc = init_cifs_idmap(); | |
1234 | if (rc) | |
c4aca0c0 | 1235 | goto out_register_key_type; |
4d79dba0 SP |
1236 | #endif /* CONFIG_CIFS_ACL */ |
1237 | ||
1238 | rc = register_filesystem(&cifs_fs_type); | |
1239 | if (rc) | |
c4aca0c0 | 1240 | goto out_init_cifs_idmap; |
45af7a0f | 1241 | |
45af7a0f SF |
1242 | return 0; |
1243 | ||
c4aca0c0 | 1244 | out_init_cifs_idmap: |
4d79dba0 SP |
1245 | #ifdef CONFIG_CIFS_ACL |
1246 | exit_cifs_idmap(); | |
c4aca0c0 | 1247 | out_register_key_type: |
4d79dba0 | 1248 | #endif |
84a15b93 | 1249 | #ifdef CONFIG_CIFS_UPCALL |
4d79dba0 | 1250 | unregister_key_type(&cifs_spnego_key_type); |
c4aca0c0 | 1251 | out_destroy_request_bufs: |
1fc7995d | 1252 | #endif |
45af7a0f | 1253 | cifs_destroy_request_bufs(); |
d3bf5221 | 1254 | out_destroy_mids: |
45af7a0f | 1255 | cifs_destroy_mids(); |
d3bf5221 | 1256 | out_destroy_inodecache: |
45af7a0f | 1257 | cifs_destroy_inodecache(); |
d3bf5221 | 1258 | out_unreg_fscache: |
f579cf3c | 1259 | cifs_fscache_unregister(); |
da472fc8 JL |
1260 | out_destroy_wq: |
1261 | destroy_workqueue(cifsiod_wq); | |
d3bf5221 SF |
1262 | out_clean_proc: |
1263 | cifs_proc_clean(); | |
1da177e4 LT |
1264 | return rc; |
1265 | } | |
1266 | ||
1267 | static void __exit | |
1268 | exit_cifs(void) | |
1269 | { | |
f96637be | 1270 | cifs_dbg(NOISY, "exit_cifs\n"); |
3dd93306 | 1271 | unregister_filesystem(&cifs_fs_type); |
78d31a3a | 1272 | cifs_dfs_release_automount_timer(); |
4d79dba0 | 1273 | #ifdef CONFIG_CIFS_ACL |
4d79dba0 SP |
1274 | exit_cifs_idmap(); |
1275 | #endif | |
84a15b93 JL |
1276 | #ifdef CONFIG_CIFS_UPCALL |
1277 | unregister_key_type(&cifs_spnego_key_type); | |
1da177e4 | 1278 | #endif |
1da177e4 | 1279 | cifs_destroy_request_bufs(); |
3dd93306 JL |
1280 | cifs_destroy_mids(); |
1281 | cifs_destroy_inodecache(); | |
1282 | cifs_fscache_unregister(); | |
da472fc8 | 1283 | destroy_workqueue(cifsiod_wq); |
3dd93306 | 1284 | cifs_proc_clean(); |
1da177e4 LT |
1285 | } |
1286 | ||
1287 | MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>"); | |
6dc0f87e | 1288 | MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */ |
1da177e4 | 1289 | MODULE_DESCRIPTION |
63135e08 SF |
1290 | ("VFS to access servers complying with the SNIA CIFS Specification " |
1291 | "e.g. Samba and Windows"); | |
1da177e4 LT |
1292 | MODULE_VERSION(CIFS_VERSION); |
1293 | module_init(init_cifs) | |
1294 | module_exit(exit_cifs) |