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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 | ||
1da177e4 | 94 | static int |
97d1152a | 95 | cifs_read_super(struct super_block *sb) |
1da177e4 LT |
96 | { |
97 | struct inode *inode; | |
b2e5cd33 | 98 | struct cifs_sb_info *cifs_sb; |
1da177e4 | 99 | int rc = 0; |
50c2f753 | 100 | |
b2e5cd33 | 101 | cifs_sb = CIFS_SB(sb); |
1da177e4 | 102 | |
2c6292ae AV |
103 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIXACL) |
104 | sb->s_flags |= MS_POSIXACL; | |
105 | ||
106 | if (cifs_sb_master_tcon(cifs_sb)->ses->capabilities & CAP_LARGE_FILES) | |
107 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
108 | else | |
109 | sb->s_maxbytes = MAX_NON_LFS; | |
110 | ||
111 | /* BB FIXME fix time_gran to be larger for LANMAN sessions */ | |
112 | sb->s_time_gran = 100; | |
113 | ||
1da177e4 LT |
114 | sb->s_magic = CIFS_MAGIC_NUMBER; |
115 | sb->s_op = &cifs_super_ops; | |
8044f7f4 | 116 | sb->s_bdi = &cifs_sb->bdi; |
1da177e4 LT |
117 | sb->s_blocksize = CIFS_MAX_MSGSIZE; |
118 | sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */ | |
9b6763e0 | 119 | inode = cifs_root_iget(sb); |
1da177e4 | 120 | |
ce634ab2 DH |
121 | if (IS_ERR(inode)) { |
122 | rc = PTR_ERR(inode); | |
1da177e4 LT |
123 | goto out_no_root; |
124 | } | |
125 | ||
48fde701 | 126 | sb->s_root = d_make_root(inode); |
1da177e4 LT |
127 | if (!sb->s_root) { |
128 | rc = -ENOMEM; | |
129 | goto out_no_root; | |
130 | } | |
50c2f753 | 131 | |
ea4b5740 | 132 | /* do that *after* d_make_root() - we want NULL ->d_op for root here */ |
1c929cfe AV |
133 | if (cifs_sb_master_tcon(cifs_sb)->nocase) |
134 | sb->s_d_op = &cifs_ci_dentry_ops; | |
135 | else | |
136 | sb->s_d_op = &cifs_dentry_ops; | |
137 | ||
f3a6a60e | 138 | #ifdef CONFIG_CIFS_NFSD_EXPORT |
7521a3c5 | 139 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
b6b38f70 | 140 | cFYI(1, "export ops supported"); |
7521a3c5 SF |
141 | sb->s_export_op = &cifs_export_ops; |
142 | } | |
f3a6a60e | 143 | #endif /* CONFIG_CIFS_NFSD_EXPORT */ |
1da177e4 LT |
144 | |
145 | return 0; | |
146 | ||
147 | out_no_root: | |
b6b38f70 | 148 | cERROR(1, "cifs_read_super: get root inode failed"); |
1da177e4 LT |
149 | return rc; |
150 | } | |
151 | ||
6d686175 AV |
152 | static void cifs_kill_sb(struct super_block *sb) |
153 | { | |
154 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
155 | kill_anon_super(sb); | |
98ab494d | 156 | cifs_umount(cifs_sb); |
1da177e4 LT |
157 | } |
158 | ||
159 | static int | |
726c3342 | 160 | cifs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 161 | { |
726c3342 | 162 | struct super_block *sb = dentry->d_sb; |
39da9847 | 163 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
96daf2b0 | 164 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
76ec5e33 | 165 | struct TCP_Server_Info *server = tcon->ses->server; |
6d5786a3 | 166 | unsigned int xid; |
76ec5e33 | 167 | int rc = 0; |
1da177e4 | 168 | |
6d5786a3 | 169 | xid = get_xid(); |
1da177e4 | 170 | |
39da9847 SF |
171 | /* |
172 | * PATH_MAX may be too long - it would presumably be total path, | |
173 | * but note that some servers (includinng Samba 3) have a shorter | |
174 | * maximum path. | |
175 | * | |
176 | * Instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO. | |
177 | */ | |
178 | buf->f_namelen = PATH_MAX; | |
1da177e4 LT |
179 | buf->f_files = 0; /* undefined */ |
180 | buf->f_ffree = 0; /* unlimited */ | |
181 | ||
76ec5e33 PS |
182 | if (server->ops->queryfs) |
183 | rc = server->ops->queryfs(xid, tcon, buf); | |
39da9847 | 184 | |
6d5786a3 | 185 | free_xid(xid); |
39da9847 | 186 | return 0; |
1da177e4 LT |
187 | } |
188 | ||
10556cb2 | 189 | static int cifs_permission(struct inode *inode, int mask) |
1da177e4 LT |
190 | { |
191 | struct cifs_sb_info *cifs_sb; | |
192 | ||
193 | cifs_sb = CIFS_SB(inode->i_sb); | |
194 | ||
f696a365 MS |
195 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) { |
196 | if ((mask & MAY_EXEC) && !execute_ok(inode)) | |
197 | return -EACCES; | |
198 | else | |
199 | return 0; | |
200 | } else /* file mode might have been restricted at mount time | |
50c2f753 | 201 | on the client (above and beyond ACL on servers) for |
1da177e4 | 202 | servers which do not support setting and viewing mode bits, |
50c2f753 | 203 | so allowing client to check permissions is useful */ |
2830ba7f | 204 | return generic_permission(inode, mask); |
1da177e4 LT |
205 | } |
206 | ||
e18b890b CL |
207 | static struct kmem_cache *cifs_inode_cachep; |
208 | static struct kmem_cache *cifs_req_cachep; | |
209 | static struct kmem_cache *cifs_mid_cachep; | |
e18b890b | 210 | static struct kmem_cache *cifs_sm_req_cachep; |
1da177e4 LT |
211 | mempool_t *cifs_sm_req_poolp; |
212 | mempool_t *cifs_req_poolp; | |
213 | mempool_t *cifs_mid_poolp; | |
214 | ||
215 | static struct inode * | |
216 | cifs_alloc_inode(struct super_block *sb) | |
217 | { | |
218 | struct cifsInodeInfo *cifs_inode; | |
e94b1766 | 219 | cifs_inode = kmem_cache_alloc(cifs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
220 | if (!cifs_inode) |
221 | return NULL; | |
222 | cifs_inode->cifsAttrs = 0x20; /* default */ | |
1da177e4 | 223 | cifs_inode->time = 0; |
b8c32dbb PS |
224 | /* |
225 | * Until the file is open and we have gotten oplock info back from the | |
226 | * server, can not assume caching of file data or metadata. | |
227 | */ | |
c6723628 | 228 | cifs_set_oplock_level(cifs_inode, 0); |
9a8165fc | 229 | cifs_inode->delete_pending = false; |
df2cf170 | 230 | cifs_inode->invalid_mapping = false; |
1da177e4 | 231 | cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */ |
fbec9ab9 | 232 | cifs_inode->server_eof = 0; |
20054bd6 JL |
233 | cifs_inode->uniqueid = 0; |
234 | cifs_inode->createtime = 0; | |
b8c32dbb PS |
235 | #ifdef CONFIG_CIFS_SMB2 |
236 | get_random_bytes(cifs_inode->lease_key, SMB2_LEASE_KEY_SIZE); | |
237 | #endif | |
238 | /* | |
239 | * Can not set i_flags here - they get immediately overwritten to zero | |
240 | * by the VFS. | |
241 | */ | |
242 | /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME; */ | |
1da177e4 | 243 | INIT_LIST_HEAD(&cifs_inode->openFileList); |
f45d3416 | 244 | INIT_LIST_HEAD(&cifs_inode->llist); |
1da177e4 LT |
245 | return &cifs_inode->vfs_inode; |
246 | } | |
247 | ||
fa0d7e3d NP |
248 | static void cifs_i_callback(struct rcu_head *head) |
249 | { | |
250 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
fa0d7e3d NP |
251 | kmem_cache_free(cifs_inode_cachep, CIFS_I(inode)); |
252 | } | |
253 | ||
1da177e4 LT |
254 | static void |
255 | cifs_destroy_inode(struct inode *inode) | |
256 | { | |
fa0d7e3d | 257 | call_rcu(&inode->i_rcu, cifs_i_callback); |
1da177e4 LT |
258 | } |
259 | ||
9451a9a5 | 260 | static void |
b57922d9 | 261 | cifs_evict_inode(struct inode *inode) |
9451a9a5 | 262 | { |
b57922d9 | 263 | truncate_inode_pages(&inode->i_data, 0); |
dbd5768f | 264 | clear_inode(inode); |
9451a9a5 SJ |
265 | cifs_fscache_release_inode_cookie(inode); |
266 | } | |
267 | ||
61f98ffd JL |
268 | static void |
269 | cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server) | |
270 | { | |
a9f1b85e PS |
271 | struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr; |
272 | struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr; | |
273 | ||
61f98ffd JL |
274 | seq_printf(s, ",addr="); |
275 | ||
a9f1b85e | 276 | switch (server->dstaddr.ss_family) { |
61f98ffd | 277 | case AF_INET: |
a9f1b85e | 278 | seq_printf(s, "%pI4", &sa->sin_addr.s_addr); |
61f98ffd JL |
279 | break; |
280 | case AF_INET6: | |
a9f1b85e PS |
281 | seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr); |
282 | if (sa6->sin6_scope_id) | |
283 | seq_printf(s, "%%%u", sa6->sin6_scope_id); | |
61f98ffd JL |
284 | break; |
285 | default: | |
286 | seq_printf(s, "(unknown)"); | |
287 | } | |
288 | } | |
289 | ||
3e715513 JL |
290 | static void |
291 | cifs_show_security(struct seq_file *s, struct TCP_Server_Info *server) | |
292 | { | |
293 | seq_printf(s, ",sec="); | |
294 | ||
295 | switch (server->secType) { | |
296 | case LANMAN: | |
297 | seq_printf(s, "lanman"); | |
298 | break; | |
299 | case NTLMv2: | |
300 | seq_printf(s, "ntlmv2"); | |
301 | break; | |
302 | case NTLM: | |
303 | seq_printf(s, "ntlm"); | |
304 | break; | |
305 | case Kerberos: | |
306 | seq_printf(s, "krb5"); | |
307 | break; | |
308 | case RawNTLMSSP: | |
309 | seq_printf(s, "ntlmssp"); | |
310 | break; | |
311 | default: | |
312 | /* shouldn't ever happen */ | |
313 | seq_printf(s, "unknown"); | |
314 | break; | |
315 | } | |
316 | ||
317 | if (server->sec_mode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) | |
318 | seq_printf(s, "i"); | |
319 | } | |
320 | ||
d06b5056 JL |
321 | static void |
322 | cifs_show_cache_flavor(struct seq_file *s, struct cifs_sb_info *cifs_sb) | |
323 | { | |
324 | seq_printf(s, ",cache="); | |
325 | ||
326 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO) | |
327 | seq_printf(s, "strict"); | |
328 | else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) | |
329 | seq_printf(s, "none"); | |
330 | else | |
331 | seq_printf(s, "loose"); | |
332 | } | |
333 | ||
1da177e4 LT |
334 | /* |
335 | * cifs_show_options() is for displaying mount options in /proc/mounts. | |
336 | * Not all settable options are displayed but most of the important | |
337 | * ones are. | |
338 | */ | |
339 | static int | |
34c80b1d | 340 | cifs_show_options(struct seq_file *s, struct dentry *root) |
1da177e4 | 341 | { |
34c80b1d | 342 | struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb); |
96daf2b0 | 343 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
3eb9a889 BG |
344 | struct sockaddr *srcaddr; |
345 | srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr; | |
8616e0fc | 346 | |
23db65f5 | 347 | seq_printf(s, ",vers=%s", tcon->ses->server->vals->version_string); |
3e715513 | 348 | cifs_show_security(s, tcon->ses->server); |
d06b5056 | 349 | cifs_show_cache_flavor(s, cifs_sb); |
3e715513 | 350 | |
ecdb69e2 SP |
351 | seq_printf(s, ",unc="); |
352 | seq_escape(s, tcon->treeName, " \t\n\\"); | |
29e07c82 JL |
353 | |
354 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) | |
355 | seq_printf(s, ",multiuser"); | |
8727c8a8 SF |
356 | else if (tcon->ses->user_name) |
357 | seq_printf(s, ",username=%s", tcon->ses->user_name); | |
29e07c82 | 358 | |
8616e0fc JL |
359 | if (tcon->ses->domainName) |
360 | seq_printf(s, ",domain=%s", tcon->ses->domainName); | |
361 | ||
3eb9a889 BG |
362 | if (srcaddr->sa_family != AF_UNSPEC) { |
363 | struct sockaddr_in *saddr4; | |
364 | struct sockaddr_in6 *saddr6; | |
365 | saddr4 = (struct sockaddr_in *)srcaddr; | |
366 | saddr6 = (struct sockaddr_in6 *)srcaddr; | |
367 | if (srcaddr->sa_family == AF_INET6) | |
368 | seq_printf(s, ",srcaddr=%pI6c", | |
369 | &saddr6->sin6_addr); | |
370 | else if (srcaddr->sa_family == AF_INET) | |
371 | seq_printf(s, ",srcaddr=%pI4", | |
372 | &saddr4->sin_addr.s_addr); | |
373 | else | |
374 | seq_printf(s, ",srcaddr=BAD-AF:%i", | |
375 | (int)(srcaddr->sa_family)); | |
376 | } | |
377 | ||
1f68233c EB |
378 | seq_printf(s, ",uid=%u", |
379 | from_kuid_munged(&init_user_ns, cifs_sb->mnt_uid)); | |
340481a3 JL |
380 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) |
381 | seq_printf(s, ",forceuid"); | |
4486d6ed JL |
382 | else |
383 | seq_printf(s, ",noforceuid"); | |
340481a3 | 384 | |
1f68233c EB |
385 | seq_printf(s, ",gid=%u", |
386 | from_kgid_munged(&init_user_ns, cifs_sb->mnt_gid)); | |
340481a3 JL |
387 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) |
388 | seq_printf(s, ",forcegid"); | |
4486d6ed JL |
389 | else |
390 | seq_printf(s, ",noforcegid"); | |
8616e0fc | 391 | |
61f98ffd | 392 | cifs_show_address(s, tcon->ses->server); |
1da177e4 | 393 | |
8616e0fc | 394 | if (!tcon->unix_ext) |
5206efd6 | 395 | seq_printf(s, ",file_mode=0%ho,dir_mode=0%ho", |
2b280fab SF |
396 | cifs_sb->mnt_file_mode, |
397 | cifs_sb->mnt_dir_mode); | |
8616e0fc JL |
398 | if (tcon->seal) |
399 | seq_printf(s, ",seal"); | |
400 | if (tcon->nocase) | |
401 | seq_printf(s, ",nocase"); | |
402 | if (tcon->retry) | |
403 | seq_printf(s, ",hard"); | |
d4ffff1f PS |
404 | if (tcon->unix_ext) |
405 | seq_printf(s, ",unix"); | |
406 | else | |
407 | seq_printf(s, ",nounix"); | |
8616e0fc JL |
408 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) |
409 | seq_printf(s, ",posixpaths"); | |
410 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) | |
411 | seq_printf(s, ",setuids"); | |
412 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) | |
413 | seq_printf(s, ",serverino"); | |
d4ffff1f PS |
414 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD) |
415 | seq_printf(s, ",rwpidforward"); | |
416 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) | |
417 | seq_printf(s, ",forcemand"); | |
8616e0fc JL |
418 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) |
419 | seq_printf(s, ",nouser_xattr"); | |
420 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR) | |
421 | seq_printf(s, ",mapchars"); | |
422 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) | |
423 | seq_printf(s, ",sfu"); | |
424 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
425 | seq_printf(s, ",nobrl"); | |
426 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) | |
427 | seq_printf(s, ",cifsacl"); | |
428 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) | |
429 | seq_printf(s, ",dynperm"); | |
34c80b1d | 430 | if (root->d_sb->s_flags & MS_POSIXACL) |
8616e0fc | 431 | seq_printf(s, ",acl"); |
736a3320 SM |
432 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) |
433 | seq_printf(s, ",mfsymlinks"); | |
476428f8 SJ |
434 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE) |
435 | seq_printf(s, ",fsc"); | |
71c424ba SF |
436 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC) |
437 | seq_printf(s, ",nostrictsync"); | |
438 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) | |
439 | seq_printf(s, ",noperm"); | |
3c7c87fd | 440 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPUID) |
1f68233c EB |
441 | seq_printf(s, ",backupuid=%u", |
442 | from_kuid_munged(&init_user_ns, | |
443 | cifs_sb->mnt_backupuid)); | |
3c7c87fd | 444 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPGID) |
1f68233c EB |
445 | seq_printf(s, ",backupgid=%u", |
446 | from_kgid_munged(&init_user_ns, | |
447 | cifs_sb->mnt_backupgid)); | |
8616e0fc | 448 | |
28f88810 SP |
449 | seq_printf(s, ",rsize=%u", cifs_sb->rsize); |
450 | seq_printf(s, ",wsize=%u", cifs_sb->wsize); | |
6d20e840 | 451 | /* convert actimeo and display it in seconds */ |
156d1790 | 452 | seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ); |
8616e0fc | 453 | |
1da177e4 LT |
454 | return 0; |
455 | } | |
456 | ||
42faad99 | 457 | static void cifs_umount_begin(struct super_block *sb) |
68058e75 | 458 | { |
42faad99 | 459 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
96daf2b0 | 460 | struct cifs_tcon *tcon; |
68058e75 | 461 | |
4523cc30 | 462 | if (cifs_sb == NULL) |
9e2e85f8 SF |
463 | return; |
464 | ||
0d424ad0 | 465 | tcon = cifs_sb_master_tcon(cifs_sb); |
f1987b44 | 466 | |
3f9bcca7 | 467 | spin_lock(&cifs_tcp_ses_lock); |
ad8034f1 SF |
468 | if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) { |
469 | /* we have other mounts to same share or we have | |
470 | already tried to force umount this and woken up | |
471 | all waiting network requests, nothing to do */ | |
3f9bcca7 | 472 | spin_unlock(&cifs_tcp_ses_lock); |
ad8034f1 SF |
473 | return; |
474 | } else if (tcon->tc_count == 1) | |
5e1253b5 | 475 | tcon->tidStatus = CifsExiting; |
3f9bcca7 | 476 | spin_unlock(&cifs_tcp_ses_lock); |
5e1253b5 | 477 | |
3a5ff61c | 478 | /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */ |
7b7abfe3 | 479 | /* cancel_notify_requests(tcon); */ |
50c2f753 | 480 | if (tcon->ses && tcon->ses->server) { |
b6b38f70 | 481 | cFYI(1, "wake up tasks now - umount begin not complete"); |
9e2e85f8 | 482 | wake_up_all(&tcon->ses->server->request_q); |
6ab16d24 SF |
483 | wake_up_all(&tcon->ses->server->response_q); |
484 | msleep(1); /* yield */ | |
485 | /* we have to kick the requests once more */ | |
486 | wake_up_all(&tcon->ses->server->response_q); | |
487 | msleep(1); | |
5e1253b5 | 488 | } |
68058e75 SF |
489 | |
490 | return; | |
491 | } | |
68058e75 | 492 | |
bf97d287 | 493 | #ifdef CONFIG_CIFS_STATS2 |
64132379 | 494 | static int cifs_show_stats(struct seq_file *s, struct dentry *root) |
bf97d287 SF |
495 | { |
496 | /* BB FIXME */ | |
497 | return 0; | |
498 | } | |
499 | #endif | |
500 | ||
1da177e4 LT |
501 | static int cifs_remount(struct super_block *sb, int *flags, char *data) |
502 | { | |
503 | *flags |= MS_NODIRATIME; | |
504 | return 0; | |
505 | } | |
506 | ||
45321ac5 | 507 | static int cifs_drop_inode(struct inode *inode) |
12420ac3 JL |
508 | { |
509 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
510 | ||
45321ac5 AV |
511 | /* no serverino => unconditional eviction */ |
512 | return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) || | |
513 | generic_drop_inode(inode); | |
12420ac3 JL |
514 | } |
515 | ||
ee9b6d61 | 516 | static const struct super_operations cifs_super_ops = { |
1da177e4 LT |
517 | .statfs = cifs_statfs, |
518 | .alloc_inode = cifs_alloc_inode, | |
519 | .destroy_inode = cifs_destroy_inode, | |
12420ac3 | 520 | .drop_inode = cifs_drop_inode, |
b57922d9 | 521 | .evict_inode = cifs_evict_inode, |
12420ac3 JL |
522 | /* .delete_inode = cifs_delete_inode, */ /* Do not need above |
523 | function unless later we add lazy close of inodes or unless the | |
50c2f753 SF |
524 | kernel forgets to call us with the same number of releases (closes) |
525 | as opens */ | |
1da177e4 | 526 | .show_options = cifs_show_options, |
7b7abfe3 | 527 | .umount_begin = cifs_umount_begin, |
1da177e4 | 528 | .remount_fs = cifs_remount, |
bf97d287 | 529 | #ifdef CONFIG_CIFS_STATS2 |
f46d3e11 | 530 | .show_stats = cifs_show_stats, |
bf97d287 | 531 | #endif |
1da177e4 LT |
532 | }; |
533 | ||
f87d39d9 SF |
534 | /* |
535 | * Get root dentry from superblock according to prefix path mount option. | |
536 | * Return dentry with refcount + 1 on success and NULL otherwise. | |
537 | */ | |
538 | static struct dentry * | |
539 | cifs_get_root(struct smb_vol *vol, struct super_block *sb) | |
540 | { | |
fec11dd9 | 541 | struct dentry *dentry; |
f87d39d9 | 542 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
fec11dd9 AV |
543 | char *full_path = NULL; |
544 | char *s, *p; | |
f87d39d9 SF |
545 | char sep; |
546 | ||
6d3ea7e4 SF |
547 | full_path = cifs_build_path_to_root(vol, cifs_sb, |
548 | cifs_sb_master_tcon(cifs_sb)); | |
f87d39d9 | 549 | if (full_path == NULL) |
9403c9c5 | 550 | return ERR_PTR(-ENOMEM); |
f87d39d9 SF |
551 | |
552 | cFYI(1, "Get root dentry for %s", full_path); | |
553 | ||
f87d39d9 | 554 | sep = CIFS_DIR_SEP(cifs_sb); |
fec11dd9 AV |
555 | dentry = dget(sb->s_root); |
556 | p = s = full_path; | |
557 | ||
558 | do { | |
559 | struct inode *dir = dentry->d_inode; | |
560 | struct dentry *child; | |
561 | ||
5b980b01 PS |
562 | if (!dir) { |
563 | dput(dentry); | |
564 | dentry = ERR_PTR(-ENOENT); | |
565 | break; | |
566 | } | |
ce2ac521 JL |
567 | if (!S_ISDIR(dir->i_mode)) { |
568 | dput(dentry); | |
569 | dentry = ERR_PTR(-ENOTDIR); | |
570 | break; | |
571 | } | |
5b980b01 | 572 | |
fec11dd9 AV |
573 | /* skip separators */ |
574 | while (*s == sep) | |
575 | s++; | |
576 | if (!*s) | |
577 | break; | |
578 | p = s++; | |
579 | /* next separator */ | |
580 | while (*s && *s != sep) | |
581 | s++; | |
582 | ||
583 | mutex_lock(&dir->i_mutex); | |
584 | child = lookup_one_len(p, dentry, s - p); | |
585 | mutex_unlock(&dir->i_mutex); | |
586 | dput(dentry); | |
587 | dentry = child; | |
588 | } while (!IS_ERR(dentry)); | |
f87d39d9 | 589 | kfree(full_path); |
fec11dd9 | 590 | return dentry; |
f87d39d9 SF |
591 | } |
592 | ||
ee01a14d AV |
593 | static int cifs_set_super(struct super_block *sb, void *data) |
594 | { | |
595 | struct cifs_mnt_data *mnt_data = data; | |
596 | sb->s_fs_info = mnt_data->cifs_sb; | |
597 | return set_anon_super(sb, NULL); | |
598 | } | |
599 | ||
d753ed97 AV |
600 | static struct dentry * |
601 | cifs_do_mount(struct file_system_type *fs_type, | |
724d9f1c | 602 | int flags, const char *dev_name, void *data) |
1da177e4 LT |
603 | { |
604 | int rc; | |
db719222 | 605 | struct super_block *sb; |
724d9f1c PS |
606 | struct cifs_sb_info *cifs_sb; |
607 | struct smb_vol *volume_info; | |
25c7f41e | 608 | struct cifs_mnt_data mnt_data; |
724d9f1c | 609 | struct dentry *root; |
1da177e4 | 610 | |
b6b38f70 | 611 | cFYI(1, "Devname: %s flags: %d ", dev_name, flags); |
1da177e4 | 612 | |
04db79b0 JL |
613 | volume_info = cifs_get_volume_info((char *)data, dev_name); |
614 | if (IS_ERR(volume_info)) | |
615 | return ERR_CAST(volume_info); | |
724d9f1c PS |
616 | |
617 | cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL); | |
618 | if (cifs_sb == NULL) { | |
619 | root = ERR_PTR(-ENOMEM); | |
5c4f1ad7 | 620 | goto out_nls; |
724d9f1c PS |
621 | } |
622 | ||
5d3bc605 AV |
623 | cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL); |
624 | if (cifs_sb->mountdata == NULL) { | |
625 | root = ERR_PTR(-ENOMEM); | |
5c4f1ad7 | 626 | goto out_cifs_sb; |
5d3bc605 AV |
627 | } |
628 | ||
724d9f1c PS |
629 | cifs_setup_cifs_sb(volume_info, cifs_sb); |
630 | ||
97d1152a AV |
631 | rc = cifs_mount(cifs_sb, volume_info); |
632 | if (rc) { | |
633 | if (!(flags & MS_SILENT)) | |
634 | cERROR(1, "cifs_mount failed w/return code = %d", rc); | |
635 | root = ERR_PTR(rc); | |
5c4f1ad7 | 636 | goto out_mountdata; |
97d1152a AV |
637 | } |
638 | ||
25c7f41e PS |
639 | mnt_data.vol = volume_info; |
640 | mnt_data.cifs_sb = cifs_sb; | |
641 | mnt_data.flags = flags; | |
642 | ||
9249e17f DH |
643 | /* BB should we make this contingent on mount parm? */ |
644 | flags |= MS_NODIRATIME | MS_NOATIME; | |
645 | ||
646 | sb = sget(fs_type, cifs_match_super, cifs_set_super, flags, &mnt_data); | |
724d9f1c | 647 | if (IS_ERR(sb)) { |
724d9f1c | 648 | root = ERR_CAST(sb); |
97d1152a | 649 | cifs_umount(cifs_sb); |
d757d71b | 650 | goto out; |
724d9f1c | 651 | } |
1da177e4 | 652 | |
ee01a14d | 653 | if (sb->s_root) { |
25c7f41e | 654 | cFYI(1, "Use existing superblock"); |
97d1152a | 655 | cifs_umount(cifs_sb); |
5c4f1ad7 | 656 | } else { |
5c4f1ad7 AV |
657 | rc = cifs_read_super(sb); |
658 | if (rc) { | |
659 | root = ERR_PTR(rc); | |
660 | goto out_super; | |
661 | } | |
b2e5cd33 | 662 | |
5c4f1ad7 | 663 | sb->s_flags |= MS_ACTIVE; |
1da177e4 | 664 | } |
724d9f1c | 665 | |
f87d39d9 | 666 | root = cifs_get_root(volume_info, sb); |
9403c9c5 | 667 | if (IS_ERR(root)) |
f87d39d9 | 668 | goto out_super; |
25c7f41e | 669 | |
f87d39d9 | 670 | cFYI(1, "dentry root is: %p", root); |
641a58d6 | 671 | goto out; |
724d9f1c | 672 | |
641a58d6 | 673 | out_super: |
641a58d6 | 674 | deactivate_locked_super(sb); |
641a58d6 | 675 | out: |
f9e59bcb | 676 | cifs_cleanup_volume_info(volume_info); |
724d9f1c | 677 | return root; |
5c4f1ad7 AV |
678 | |
679 | out_mountdata: | |
680 | kfree(cifs_sb->mountdata); | |
681 | out_cifs_sb: | |
682 | kfree(cifs_sb); | |
683 | out_nls: | |
684 | unload_nls(volume_info->local_nls); | |
685 | goto out; | |
1da177e4 LT |
686 | } |
687 | ||
027445c3 BP |
688 | static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov, |
689 | unsigned long nr_segs, loff_t pos) | |
1da177e4 | 690 | { |
496ad9aa | 691 | struct inode *inode = file_inode(iocb->ki_filp); |
1da177e4 | 692 | ssize_t written; |
72432ffc | 693 | int rc; |
1da177e4 | 694 | |
027445c3 | 695 | written = generic_file_aio_write(iocb, iov, nr_segs, pos); |
72432ffc PS |
696 | |
697 | if (CIFS_I(inode)->clientCanCacheAll) | |
698 | return written; | |
699 | ||
700 | rc = filemap_fdatawrite(inode->i_mapping); | |
701 | if (rc) | |
702 | cFYI(1, "cifs_file_aio_write: %d rc on %p inode", rc, inode); | |
703 | ||
1da177e4 LT |
704 | return written; |
705 | } | |
706 | ||
965c8e59 | 707 | static loff_t cifs_llseek(struct file *file, loff_t offset, int whence) |
c32a0b68 | 708 | { |
06222e49 | 709 | /* |
965c8e59 | 710 | * whence == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate |
06222e49 JB |
711 | * the cached file length |
712 | */ | |
965c8e59 | 713 | if (whence != SEEK_SET && whence != SEEK_CUR) { |
6feb9891 | 714 | int rc; |
496ad9aa | 715 | struct inode *inode = file_inode(file); |
6feb9891 PS |
716 | |
717 | /* | |
718 | * We need to be sure that all dirty pages are written and the | |
719 | * server has the newest file length. | |
720 | */ | |
721 | if (!CIFS_I(inode)->clientCanCacheRead && inode->i_mapping && | |
722 | inode->i_mapping->nrpages != 0) { | |
723 | rc = filemap_fdatawait(inode->i_mapping); | |
156ecb2d SF |
724 | if (rc) { |
725 | mapping_set_error(inode->i_mapping, rc); | |
726 | return rc; | |
727 | } | |
6feb9891 PS |
728 | } |
729 | /* | |
730 | * Some applications poll for the file length in this strange | |
731 | * way so we must seek to end on non-oplocked files by | |
732 | * setting the revalidate time to zero. | |
733 | */ | |
734 | CIFS_I(inode)->time = 0; | |
735 | ||
736 | rc = cifs_revalidate_file_attr(file); | |
737 | if (rc < 0) | |
738 | return (loff_t)rc; | |
c32a0b68 | 739 | } |
965c8e59 | 740 | return generic_file_llseek(file, offset, whence); |
c32a0b68 SF |
741 | } |
742 | ||
84210e91 SF |
743 | static int cifs_setlease(struct file *file, long arg, struct file_lock **lease) |
744 | { | |
b89f4321 AB |
745 | /* note that this is called by vfs setlease with lock_flocks held |
746 | to protect *lease from going away */ | |
496ad9aa | 747 | struct inode *inode = file_inode(file); |
ba00ba64 | 748 | struct cifsFileInfo *cfile = file->private_data; |
84210e91 SF |
749 | |
750 | if (!(S_ISREG(inode->i_mode))) | |
751 | return -EINVAL; | |
752 | ||
753 | /* check if file is oplocked */ | |
754 | if (((arg == F_RDLCK) && | |
755 | (CIFS_I(inode)->clientCanCacheRead)) || | |
756 | ((arg == F_WRLCK) && | |
757 | (CIFS_I(inode)->clientCanCacheAll))) | |
758 | return generic_setlease(file, arg, lease); | |
13cfb733 JL |
759 | else if (tlink_tcon(cfile->tlink)->local_lease && |
760 | !CIFS_I(inode)->clientCanCacheRead) | |
84210e91 SF |
761 | /* If the server claims to support oplock on this |
762 | file, then we still need to check oplock even | |
763 | if the local_lease mount option is set, but there | |
764 | are servers which do not support oplock for which | |
765 | this mount option may be useful if the user | |
766 | knows that the file won't be changed on the server | |
767 | by anyone else */ | |
768 | return generic_setlease(file, arg, lease); | |
51ee4b84 | 769 | else |
84210e91 SF |
770 | return -EAGAIN; |
771 | } | |
84210e91 | 772 | |
e6ab1582 | 773 | struct file_system_type cifs_fs_type = { |
1da177e4 LT |
774 | .owner = THIS_MODULE, |
775 | .name = "cifs", | |
d753ed97 | 776 | .mount = cifs_do_mount, |
6d686175 | 777 | .kill_sb = cifs_kill_sb, |
1da177e4 LT |
778 | /* .fs_flags */ |
779 | }; | |
754661f1 | 780 | const struct inode_operations cifs_dir_inode_ops = { |
1da177e4 | 781 | .create = cifs_create, |
d2c12719 | 782 | .atomic_open = cifs_atomic_open, |
1da177e4 LT |
783 | .lookup = cifs_lookup, |
784 | .getattr = cifs_getattr, | |
785 | .unlink = cifs_unlink, | |
786 | .link = cifs_hardlink, | |
787 | .mkdir = cifs_mkdir, | |
788 | .rmdir = cifs_rmdir, | |
789 | .rename = cifs_rename, | |
790 | .permission = cifs_permission, | |
791 | /* revalidate:cifs_revalidate, */ | |
792 | .setattr = cifs_setattr, | |
793 | .symlink = cifs_symlink, | |
794 | .mknod = cifs_mknod, | |
795 | #ifdef CONFIG_CIFS_XATTR | |
796 | .setxattr = cifs_setxattr, | |
797 | .getxattr = cifs_getxattr, | |
798 | .listxattr = cifs_listxattr, | |
799 | .removexattr = cifs_removexattr, | |
800 | #endif | |
801 | }; | |
802 | ||
754661f1 | 803 | const struct inode_operations cifs_file_inode_ops = { |
1da177e4 LT |
804 | /* revalidate:cifs_revalidate, */ |
805 | .setattr = cifs_setattr, | |
806 | .getattr = cifs_getattr, /* do we need this anymore? */ | |
807 | .rename = cifs_rename, | |
808 | .permission = cifs_permission, | |
809 | #ifdef CONFIG_CIFS_XATTR | |
810 | .setxattr = cifs_setxattr, | |
811 | .getxattr = cifs_getxattr, | |
812 | .listxattr = cifs_listxattr, | |
813 | .removexattr = cifs_removexattr, | |
50c2f753 | 814 | #endif |
1da177e4 LT |
815 | }; |
816 | ||
754661f1 | 817 | const struct inode_operations cifs_symlink_inode_ops = { |
50c2f753 | 818 | .readlink = generic_readlink, |
1da177e4 LT |
819 | .follow_link = cifs_follow_link, |
820 | .put_link = cifs_put_link, | |
821 | .permission = cifs_permission, | |
822 | /* BB add the following two eventually */ | |
823 | /* revalidate: cifs_revalidate, | |
824 | setattr: cifs_notify_change, *//* BB do we need notify change */ | |
825 | #ifdef CONFIG_CIFS_XATTR | |
826 | .setxattr = cifs_setxattr, | |
827 | .getxattr = cifs_getxattr, | |
828 | .listxattr = cifs_listxattr, | |
829 | .removexattr = cifs_removexattr, | |
50c2f753 | 830 | #endif |
1da177e4 LT |
831 | }; |
832 | ||
4b6f5d20 | 833 | const struct file_operations cifs_file_ops = { |
87c89dd7 SF |
834 | .read = do_sync_read, |
835 | .write = do_sync_write, | |
87c89dd7 SF |
836 | .aio_read = generic_file_aio_read, |
837 | .aio_write = cifs_file_aio_write, | |
1da177e4 LT |
838 | .open = cifs_open, |
839 | .release = cifs_close, | |
840 | .lock = cifs_lock, | |
841 | .fsync = cifs_fsync, | |
842 | .flush = cifs_flush, | |
843 | .mmap = cifs_file_mmap, | |
5ffc4ef4 | 844 | .splice_read = generic_file_splice_read, |
c32a0b68 | 845 | .llseek = cifs_llseek, |
c67593a0 | 846 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 847 | .unlocked_ioctl = cifs_ioctl, |
c67593a0 | 848 | #endif /* CONFIG_CIFS_POSIX */ |
84210e91 | 849 | .setlease = cifs_setlease, |
1da177e4 LT |
850 | }; |
851 | ||
8be7e6ba PS |
852 | const struct file_operations cifs_file_strict_ops = { |
853 | .read = do_sync_read, | |
854 | .write = do_sync_write, | |
a70307ee | 855 | .aio_read = cifs_strict_readv, |
72432ffc | 856 | .aio_write = cifs_strict_writev, |
8be7e6ba PS |
857 | .open = cifs_open, |
858 | .release = cifs_close, | |
859 | .lock = cifs_lock, | |
860 | .fsync = cifs_strict_fsync, | |
861 | .flush = cifs_flush, | |
7a6a19b1 | 862 | .mmap = cifs_file_strict_mmap, |
8be7e6ba PS |
863 | .splice_read = generic_file_splice_read, |
864 | .llseek = cifs_llseek, | |
865 | #ifdef CONFIG_CIFS_POSIX | |
866 | .unlocked_ioctl = cifs_ioctl, | |
867 | #endif /* CONFIG_CIFS_POSIX */ | |
868 | .setlease = cifs_setlease, | |
869 | }; | |
870 | ||
4b6f5d20 | 871 | const struct file_operations cifs_file_direct_ops = { |
0b81c1c4 PS |
872 | /* BB reevaluate whether they can be done with directio, no cache */ |
873 | .read = do_sync_read, | |
874 | .write = do_sync_write, | |
875 | .aio_read = cifs_user_readv, | |
876 | .aio_write = cifs_user_writev, | |
1da177e4 LT |
877 | .open = cifs_open, |
878 | .release = cifs_close, | |
879 | .lock = cifs_lock, | |
880 | .fsync = cifs_fsync, | |
881 | .flush = cifs_flush, | |
a994b8fa | 882 | .mmap = cifs_file_mmap, |
5ffc4ef4 | 883 | .splice_read = generic_file_splice_read, |
c67593a0 | 884 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 885 | .unlocked_ioctl = cifs_ioctl, |
c67593a0 | 886 | #endif /* CONFIG_CIFS_POSIX */ |
c32a0b68 | 887 | .llseek = cifs_llseek, |
84210e91 | 888 | .setlease = cifs_setlease, |
1da177e4 | 889 | }; |
8be7e6ba | 890 | |
4b6f5d20 | 891 | const struct file_operations cifs_file_nobrl_ops = { |
87c89dd7 SF |
892 | .read = do_sync_read, |
893 | .write = do_sync_write, | |
87c89dd7 SF |
894 | .aio_read = generic_file_aio_read, |
895 | .aio_write = cifs_file_aio_write, | |
896 | .open = cifs_open, | |
897 | .release = cifs_close, | |
898 | .fsync = cifs_fsync, | |
899 | .flush = cifs_flush, | |
900 | .mmap = cifs_file_mmap, | |
5ffc4ef4 | 901 | .splice_read = generic_file_splice_read, |
c32a0b68 | 902 | .llseek = cifs_llseek, |
8b94bcb9 | 903 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 904 | .unlocked_ioctl = cifs_ioctl, |
8b94bcb9 | 905 | #endif /* CONFIG_CIFS_POSIX */ |
84210e91 | 906 | .setlease = cifs_setlease, |
8b94bcb9 SF |
907 | }; |
908 | ||
8be7e6ba PS |
909 | const struct file_operations cifs_file_strict_nobrl_ops = { |
910 | .read = do_sync_read, | |
911 | .write = do_sync_write, | |
a70307ee | 912 | .aio_read = cifs_strict_readv, |
72432ffc | 913 | .aio_write = cifs_strict_writev, |
8be7e6ba PS |
914 | .open = cifs_open, |
915 | .release = cifs_close, | |
916 | .fsync = cifs_strict_fsync, | |
917 | .flush = cifs_flush, | |
7a6a19b1 | 918 | .mmap = cifs_file_strict_mmap, |
8be7e6ba PS |
919 | .splice_read = generic_file_splice_read, |
920 | .llseek = cifs_llseek, | |
921 | #ifdef CONFIG_CIFS_POSIX | |
922 | .unlocked_ioctl = cifs_ioctl, | |
923 | #endif /* CONFIG_CIFS_POSIX */ | |
924 | .setlease = cifs_setlease, | |
925 | }; | |
926 | ||
4b6f5d20 | 927 | const struct file_operations cifs_file_direct_nobrl_ops = { |
0b81c1c4 PS |
928 | /* BB reevaluate whether they can be done with directio, no cache */ |
929 | .read = do_sync_read, | |
930 | .write = do_sync_write, | |
931 | .aio_read = cifs_user_readv, | |
932 | .aio_write = cifs_user_writev, | |
87c89dd7 SF |
933 | .open = cifs_open, |
934 | .release = cifs_close, | |
935 | .fsync = cifs_fsync, | |
936 | .flush = cifs_flush, | |
810627a0 | 937 | .mmap = cifs_file_mmap, |
5ffc4ef4 | 938 | .splice_read = generic_file_splice_read, |
8b94bcb9 | 939 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 940 | .unlocked_ioctl = cifs_ioctl, |
8b94bcb9 | 941 | #endif /* CONFIG_CIFS_POSIX */ |
c32a0b68 | 942 | .llseek = cifs_llseek, |
84210e91 | 943 | .setlease = cifs_setlease, |
8b94bcb9 | 944 | }; |
1da177e4 | 945 | |
4b6f5d20 | 946 | const struct file_operations cifs_dir_ops = { |
1da177e4 LT |
947 | .readdir = cifs_readdir, |
948 | .release = cifs_closedir, | |
949 | .read = generic_read_dir, | |
f9ddcca4 | 950 | .unlocked_ioctl = cifs_ioctl, |
3222a3e5 | 951 | .llseek = generic_file_llseek, |
1da177e4 LT |
952 | }; |
953 | ||
954 | static void | |
51cc5068 | 955 | cifs_init_once(void *inode) |
1da177e4 LT |
956 | { |
957 | struct cifsInodeInfo *cifsi = inode; | |
958 | ||
a35afb83 | 959 | inode_init_once(&cifsi->vfs_inode); |
1b4b55a1 | 960 | init_rwsem(&cifsi->lock_sem); |
1da177e4 LT |
961 | } |
962 | ||
963 | static int | |
964 | cifs_init_inodecache(void) | |
965 | { | |
966 | cifs_inode_cachep = kmem_cache_create("cifs_inode_cache", | |
26f57364 | 967 | sizeof(struct cifsInodeInfo), |
fffb60f9 PJ |
968 | 0, (SLAB_RECLAIM_ACCOUNT| |
969 | SLAB_MEM_SPREAD), | |
20c2df83 | 970 | cifs_init_once); |
1da177e4 LT |
971 | if (cifs_inode_cachep == NULL) |
972 | return -ENOMEM; | |
973 | ||
974 | return 0; | |
975 | } | |
976 | ||
977 | static void | |
978 | cifs_destroy_inodecache(void) | |
979 | { | |
8c0a8537 KS |
980 | /* |
981 | * Make sure all delayed rcu free inodes are flushed before we | |
982 | * destroy cache. | |
983 | */ | |
984 | rcu_barrier(); | |
1a1d92c1 | 985 | kmem_cache_destroy(cifs_inode_cachep); |
1da177e4 LT |
986 | } |
987 | ||
988 | static int | |
989 | cifs_init_request_bufs(void) | |
990 | { | |
3792c173 PS |
991 | size_t max_hdr_size = MAX_CIFS_HDR_SIZE; |
992 | #ifdef CONFIG_CIFS_SMB2 | |
993 | /* | |
994 | * SMB2 maximum header size is bigger than CIFS one - no problems to | |
995 | * allocate some more bytes for CIFS. | |
996 | */ | |
997 | max_hdr_size = MAX_SMB2_HDR_SIZE; | |
998 | #endif | |
4523cc30 | 999 | if (CIFSMaxBufSize < 8192) { |
1da177e4 LT |
1000 | /* Buffer size can not be smaller than 2 * PATH_MAX since maximum |
1001 | Unicode path name has to fit in any SMB/CIFS path based frames */ | |
1002 | CIFSMaxBufSize = 8192; | |
1003 | } else if (CIFSMaxBufSize > 1024*127) { | |
1004 | CIFSMaxBufSize = 1024 * 127; | |
1005 | } else { | |
1006 | CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/ | |
1007 | } | |
b6b38f70 | 1008 | /* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */ |
1da177e4 | 1009 | cifs_req_cachep = kmem_cache_create("cifs_request", |
3792c173 | 1010 | CIFSMaxBufSize + max_hdr_size, 0, |
20c2df83 | 1011 | SLAB_HWCACHE_ALIGN, NULL); |
1da177e4 LT |
1012 | if (cifs_req_cachep == NULL) |
1013 | return -ENOMEM; | |
1014 | ||
4523cc30 | 1015 | if (cifs_min_rcv < 1) |
1da177e4 LT |
1016 | cifs_min_rcv = 1; |
1017 | else if (cifs_min_rcv > 64) { | |
1018 | cifs_min_rcv = 64; | |
b6b38f70 | 1019 | cERROR(1, "cifs_min_rcv set to maximum (64)"); |
1da177e4 LT |
1020 | } |
1021 | ||
93d2341c MD |
1022 | cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv, |
1023 | cifs_req_cachep); | |
1da177e4 | 1024 | |
4523cc30 | 1025 | if (cifs_req_poolp == NULL) { |
1da177e4 LT |
1026 | kmem_cache_destroy(cifs_req_cachep); |
1027 | return -ENOMEM; | |
1028 | } | |
ec637e3f | 1029 | /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and |
1da177e4 LT |
1030 | almost all handle based requests (but not write response, nor is it |
1031 | sufficient for path based requests). A smaller size would have | |
50c2f753 | 1032 | been more efficient (compacting multiple slab items on one 4k page) |
1da177e4 LT |
1033 | for the case in which debug was on, but this larger size allows |
1034 | more SMBs to use small buffer alloc and is still much more | |
6dc0f87e | 1035 | efficient to alloc 1 per page off the slab compared to 17K (5page) |
1da177e4 LT |
1036 | alloc of large cifs buffers even when page debugging is on */ |
1037 | cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq", | |
6dc0f87e | 1038 | MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN, |
20c2df83 | 1039 | NULL); |
1da177e4 LT |
1040 | if (cifs_sm_req_cachep == NULL) { |
1041 | mempool_destroy(cifs_req_poolp); | |
1042 | kmem_cache_destroy(cifs_req_cachep); | |
6dc0f87e | 1043 | return -ENOMEM; |
1da177e4 LT |
1044 | } |
1045 | ||
4523cc30 | 1046 | if (cifs_min_small < 2) |
1da177e4 LT |
1047 | cifs_min_small = 2; |
1048 | else if (cifs_min_small > 256) { | |
1049 | cifs_min_small = 256; | |
b6b38f70 | 1050 | cFYI(1, "cifs_min_small set to maximum (256)"); |
1da177e4 LT |
1051 | } |
1052 | ||
93d2341c MD |
1053 | cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small, |
1054 | cifs_sm_req_cachep); | |
1da177e4 | 1055 | |
4523cc30 | 1056 | if (cifs_sm_req_poolp == NULL) { |
1da177e4 LT |
1057 | mempool_destroy(cifs_req_poolp); |
1058 | kmem_cache_destroy(cifs_req_cachep); | |
1059 | kmem_cache_destroy(cifs_sm_req_cachep); | |
1060 | return -ENOMEM; | |
1061 | } | |
1062 | ||
1063 | return 0; | |
1064 | } | |
1065 | ||
1066 | static void | |
1067 | cifs_destroy_request_bufs(void) | |
1068 | { | |
1069 | mempool_destroy(cifs_req_poolp); | |
1a1d92c1 | 1070 | kmem_cache_destroy(cifs_req_cachep); |
1da177e4 | 1071 | mempool_destroy(cifs_sm_req_poolp); |
1a1d92c1 | 1072 | kmem_cache_destroy(cifs_sm_req_cachep); |
1da177e4 LT |
1073 | } |
1074 | ||
1075 | static int | |
1076 | cifs_init_mids(void) | |
1077 | { | |
1078 | cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids", | |
26f57364 SF |
1079 | sizeof(struct mid_q_entry), 0, |
1080 | SLAB_HWCACHE_ALIGN, NULL); | |
1da177e4 LT |
1081 | if (cifs_mid_cachep == NULL) |
1082 | return -ENOMEM; | |
1083 | ||
93d2341c MD |
1084 | /* 3 is a reasonable minimum number of simultaneous operations */ |
1085 | cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep); | |
4523cc30 | 1086 | if (cifs_mid_poolp == NULL) { |
1da177e4 LT |
1087 | kmem_cache_destroy(cifs_mid_cachep); |
1088 | return -ENOMEM; | |
1089 | } | |
1090 | ||
1da177e4 LT |
1091 | return 0; |
1092 | } | |
1093 | ||
1094 | static void | |
1095 | cifs_destroy_mids(void) | |
1096 | { | |
1097 | mempool_destroy(cifs_mid_poolp); | |
1a1d92c1 | 1098 | kmem_cache_destroy(cifs_mid_cachep); |
1da177e4 LT |
1099 | } |
1100 | ||
1da177e4 LT |
1101 | static int __init |
1102 | init_cifs(void) | |
1103 | { | |
1104 | int rc = 0; | |
1da177e4 | 1105 | cifs_proc_init(); |
e7ddee90 | 1106 | INIT_LIST_HEAD(&cifs_tcp_ses_list); |
0eff0e26 | 1107 | #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */ |
4ca9c190 SF |
1108 | INIT_LIST_HEAD(&GlobalDnotifyReqList); |
1109 | INIT_LIST_HEAD(&GlobalDnotifyRsp_Q); | |
0eff0e26 | 1110 | #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */ |
1da177e4 LT |
1111 | /* |
1112 | * Initialize Global counters | |
1113 | */ | |
1114 | atomic_set(&sesInfoAllocCount, 0); | |
1115 | atomic_set(&tconInfoAllocCount, 0); | |
6dc0f87e | 1116 | atomic_set(&tcpSesAllocCount, 0); |
1da177e4 LT |
1117 | atomic_set(&tcpSesReconnectCount, 0); |
1118 | atomic_set(&tconInfoReconnectCount, 0); | |
1119 | ||
1120 | atomic_set(&bufAllocCount, 0); | |
4498eed5 SF |
1121 | atomic_set(&smBufAllocCount, 0); |
1122 | #ifdef CONFIG_CIFS_STATS2 | |
1123 | atomic_set(&totBufAllocCount, 0); | |
1124 | atomic_set(&totSmBufAllocCount, 0); | |
1125 | #endif /* CONFIG_CIFS_STATS2 */ | |
1126 | ||
1da177e4 LT |
1127 | atomic_set(&midCount, 0); |
1128 | GlobalCurrentXid = 0; | |
1129 | GlobalTotalActiveXid = 0; | |
1130 | GlobalMaxActiveXid = 0; | |
3f9bcca7 | 1131 | spin_lock_init(&cifs_tcp_ses_lock); |
4477288a | 1132 | spin_lock_init(&cifs_file_list_lock); |
1da177e4 LT |
1133 | spin_lock_init(&GlobalMid_Lock); |
1134 | ||
b8c32dbb PS |
1135 | #ifdef CONFIG_CIFS_SMB2 |
1136 | get_random_bytes(cifs_client_guid, SMB2_CLIENT_GUID_SIZE); | |
1137 | #endif | |
1138 | ||
4523cc30 | 1139 | if (cifs_max_pending < 2) { |
1da177e4 | 1140 | cifs_max_pending = 2; |
b6b38f70 | 1141 | cFYI(1, "cifs_max_pending set to min of 2"); |
10b9b98e PS |
1142 | } else if (cifs_max_pending > CIFS_MAX_REQ) { |
1143 | cifs_max_pending = CIFS_MAX_REQ; | |
1144 | cFYI(1, "cifs_max_pending set to max of %u", CIFS_MAX_REQ); | |
1da177e4 LT |
1145 | } |
1146 | ||
da472fc8 JL |
1147 | cifsiod_wq = alloc_workqueue("cifsiod", WQ_FREEZABLE|WQ_MEM_RECLAIM, 0); |
1148 | if (!cifsiod_wq) { | |
1149 | rc = -ENOMEM; | |
1150 | goto out_clean_proc; | |
1151 | } | |
1152 | ||
f579cf3c SJ |
1153 | rc = cifs_fscache_register(); |
1154 | if (rc) | |
da472fc8 | 1155 | goto out_destroy_wq; |
f579cf3c | 1156 | |
1da177e4 | 1157 | rc = cifs_init_inodecache(); |
45af7a0f | 1158 | if (rc) |
d3bf5221 | 1159 | goto out_unreg_fscache; |
45af7a0f SF |
1160 | |
1161 | rc = cifs_init_mids(); | |
1162 | if (rc) | |
1163 | goto out_destroy_inodecache; | |
1164 | ||
1165 | rc = cifs_init_request_bufs(); | |
1166 | if (rc) | |
1167 | goto out_destroy_mids; | |
1168 | ||
84a15b93 JL |
1169 | #ifdef CONFIG_CIFS_UPCALL |
1170 | rc = register_key_type(&cifs_spnego_key_type); | |
1171 | if (rc) | |
4d79dba0 SP |
1172 | goto out_destroy_request_bufs; |
1173 | #endif /* CONFIG_CIFS_UPCALL */ | |
1174 | ||
1175 | #ifdef CONFIG_CIFS_ACL | |
1176 | rc = init_cifs_idmap(); | |
1177 | if (rc) | |
c4aca0c0 | 1178 | goto out_register_key_type; |
4d79dba0 SP |
1179 | #endif /* CONFIG_CIFS_ACL */ |
1180 | ||
1181 | rc = register_filesystem(&cifs_fs_type); | |
1182 | if (rc) | |
c4aca0c0 | 1183 | goto out_init_cifs_idmap; |
45af7a0f | 1184 | |
45af7a0f SF |
1185 | return 0; |
1186 | ||
c4aca0c0 | 1187 | out_init_cifs_idmap: |
4d79dba0 SP |
1188 | #ifdef CONFIG_CIFS_ACL |
1189 | exit_cifs_idmap(); | |
c4aca0c0 | 1190 | out_register_key_type: |
4d79dba0 | 1191 | #endif |
84a15b93 | 1192 | #ifdef CONFIG_CIFS_UPCALL |
4d79dba0 | 1193 | unregister_key_type(&cifs_spnego_key_type); |
c4aca0c0 | 1194 | out_destroy_request_bufs: |
1fc7995d | 1195 | #endif |
45af7a0f | 1196 | cifs_destroy_request_bufs(); |
d3bf5221 | 1197 | out_destroy_mids: |
45af7a0f | 1198 | cifs_destroy_mids(); |
d3bf5221 | 1199 | out_destroy_inodecache: |
45af7a0f | 1200 | cifs_destroy_inodecache(); |
d3bf5221 | 1201 | out_unreg_fscache: |
f579cf3c | 1202 | cifs_fscache_unregister(); |
da472fc8 JL |
1203 | out_destroy_wq: |
1204 | destroy_workqueue(cifsiod_wq); | |
d3bf5221 SF |
1205 | out_clean_proc: |
1206 | cifs_proc_clean(); | |
1da177e4 LT |
1207 | return rc; |
1208 | } | |
1209 | ||
1210 | static void __exit | |
1211 | exit_cifs(void) | |
1212 | { | |
b6b38f70 | 1213 | cFYI(DBG2, "exit_cifs"); |
3dd93306 | 1214 | unregister_filesystem(&cifs_fs_type); |
78d31a3a | 1215 | cifs_dfs_release_automount_timer(); |
4d79dba0 | 1216 | #ifdef CONFIG_CIFS_ACL |
4d79dba0 SP |
1217 | exit_cifs_idmap(); |
1218 | #endif | |
84a15b93 JL |
1219 | #ifdef CONFIG_CIFS_UPCALL |
1220 | unregister_key_type(&cifs_spnego_key_type); | |
1da177e4 | 1221 | #endif |
1da177e4 | 1222 | cifs_destroy_request_bufs(); |
3dd93306 JL |
1223 | cifs_destroy_mids(); |
1224 | cifs_destroy_inodecache(); | |
1225 | cifs_fscache_unregister(); | |
da472fc8 | 1226 | destroy_workqueue(cifsiod_wq); |
3dd93306 | 1227 | cifs_proc_clean(); |
1da177e4 LT |
1228 | } |
1229 | ||
1230 | MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>"); | |
6dc0f87e | 1231 | MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */ |
1da177e4 | 1232 | MODULE_DESCRIPTION |
63135e08 SF |
1233 | ("VFS to access servers complying with the SNIA CIFS Specification " |
1234 | "e.g. Samba and Windows"); | |
1da177e4 LT |
1235 | MODULE_VERSION(CIFS_VERSION); |
1236 | module_init(init_cifs) | |
1237 | module_exit(exit_cifs) |