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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; |
c299dd0e | 231 | cifs_inode->leave_pages_clean = false; |
1da177e4 | 232 | cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */ |
fbec9ab9 | 233 | cifs_inode->server_eof = 0; |
20054bd6 JL |
234 | cifs_inode->uniqueid = 0; |
235 | cifs_inode->createtime = 0; | |
b8c32dbb PS |
236 | #ifdef CONFIG_CIFS_SMB2 |
237 | get_random_bytes(cifs_inode->lease_key, SMB2_LEASE_KEY_SIZE); | |
238 | #endif | |
239 | /* | |
240 | * Can not set i_flags here - they get immediately overwritten to zero | |
241 | * by the VFS. | |
242 | */ | |
243 | /* cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME; */ | |
1da177e4 | 244 | INIT_LIST_HEAD(&cifs_inode->openFileList); |
f45d3416 | 245 | INIT_LIST_HEAD(&cifs_inode->llist); |
1da177e4 LT |
246 | return &cifs_inode->vfs_inode; |
247 | } | |
248 | ||
fa0d7e3d NP |
249 | static void cifs_i_callback(struct rcu_head *head) |
250 | { | |
251 | struct inode *inode = container_of(head, struct inode, i_rcu); | |
fa0d7e3d NP |
252 | kmem_cache_free(cifs_inode_cachep, CIFS_I(inode)); |
253 | } | |
254 | ||
1da177e4 LT |
255 | static void |
256 | cifs_destroy_inode(struct inode *inode) | |
257 | { | |
fa0d7e3d | 258 | call_rcu(&inode->i_rcu, cifs_i_callback); |
1da177e4 LT |
259 | } |
260 | ||
9451a9a5 | 261 | static void |
b57922d9 | 262 | cifs_evict_inode(struct inode *inode) |
9451a9a5 | 263 | { |
b57922d9 | 264 | truncate_inode_pages(&inode->i_data, 0); |
dbd5768f | 265 | clear_inode(inode); |
9451a9a5 SJ |
266 | cifs_fscache_release_inode_cookie(inode); |
267 | } | |
268 | ||
61f98ffd JL |
269 | static void |
270 | cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server) | |
271 | { | |
a9f1b85e PS |
272 | struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr; |
273 | struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr; | |
274 | ||
61f98ffd JL |
275 | seq_printf(s, ",addr="); |
276 | ||
a9f1b85e | 277 | switch (server->dstaddr.ss_family) { |
61f98ffd | 278 | case AF_INET: |
a9f1b85e | 279 | seq_printf(s, "%pI4", &sa->sin_addr.s_addr); |
61f98ffd JL |
280 | break; |
281 | case AF_INET6: | |
a9f1b85e PS |
282 | seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr); |
283 | if (sa6->sin6_scope_id) | |
284 | seq_printf(s, "%%%u", sa6->sin6_scope_id); | |
61f98ffd JL |
285 | break; |
286 | default: | |
287 | seq_printf(s, "(unknown)"); | |
288 | } | |
289 | } | |
290 | ||
3e715513 JL |
291 | static void |
292 | cifs_show_security(struct seq_file *s, struct TCP_Server_Info *server) | |
293 | { | |
294 | seq_printf(s, ",sec="); | |
295 | ||
296 | switch (server->secType) { | |
297 | case LANMAN: | |
298 | seq_printf(s, "lanman"); | |
299 | break; | |
300 | case NTLMv2: | |
301 | seq_printf(s, "ntlmv2"); | |
302 | break; | |
303 | case NTLM: | |
304 | seq_printf(s, "ntlm"); | |
305 | break; | |
306 | case Kerberos: | |
307 | seq_printf(s, "krb5"); | |
308 | break; | |
309 | case RawNTLMSSP: | |
310 | seq_printf(s, "ntlmssp"); | |
311 | break; | |
312 | default: | |
313 | /* shouldn't ever happen */ | |
314 | seq_printf(s, "unknown"); | |
315 | break; | |
316 | } | |
317 | ||
318 | if (server->sec_mode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) | |
319 | seq_printf(s, "i"); | |
320 | } | |
321 | ||
d06b5056 JL |
322 | static void |
323 | cifs_show_cache_flavor(struct seq_file *s, struct cifs_sb_info *cifs_sb) | |
324 | { | |
325 | seq_printf(s, ",cache="); | |
326 | ||
327 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO) | |
328 | seq_printf(s, "strict"); | |
329 | else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) | |
330 | seq_printf(s, "none"); | |
331 | else | |
332 | seq_printf(s, "loose"); | |
333 | } | |
334 | ||
1da177e4 LT |
335 | /* |
336 | * cifs_show_options() is for displaying mount options in /proc/mounts. | |
337 | * Not all settable options are displayed but most of the important | |
338 | * ones are. | |
339 | */ | |
340 | static int | |
34c80b1d | 341 | cifs_show_options(struct seq_file *s, struct dentry *root) |
1da177e4 | 342 | { |
34c80b1d | 343 | struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb); |
96daf2b0 | 344 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
3eb9a889 BG |
345 | struct sockaddr *srcaddr; |
346 | srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr; | |
8616e0fc | 347 | |
23db65f5 | 348 | seq_printf(s, ",vers=%s", tcon->ses->server->vals->version_string); |
3e715513 | 349 | cifs_show_security(s, tcon->ses->server); |
d06b5056 | 350 | cifs_show_cache_flavor(s, cifs_sb); |
3e715513 | 351 | |
ecdb69e2 SP |
352 | seq_printf(s, ",unc="); |
353 | seq_escape(s, tcon->treeName, " \t\n\\"); | |
29e07c82 JL |
354 | |
355 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MULTIUSER) | |
356 | seq_printf(s, ",multiuser"); | |
8727c8a8 SF |
357 | else if (tcon->ses->user_name) |
358 | seq_printf(s, ",username=%s", tcon->ses->user_name); | |
29e07c82 | 359 | |
8616e0fc JL |
360 | if (tcon->ses->domainName) |
361 | seq_printf(s, ",domain=%s", tcon->ses->domainName); | |
362 | ||
3eb9a889 BG |
363 | if (srcaddr->sa_family != AF_UNSPEC) { |
364 | struct sockaddr_in *saddr4; | |
365 | struct sockaddr_in6 *saddr6; | |
366 | saddr4 = (struct sockaddr_in *)srcaddr; | |
367 | saddr6 = (struct sockaddr_in6 *)srcaddr; | |
368 | if (srcaddr->sa_family == AF_INET6) | |
369 | seq_printf(s, ",srcaddr=%pI6c", | |
370 | &saddr6->sin6_addr); | |
371 | else if (srcaddr->sa_family == AF_INET) | |
372 | seq_printf(s, ",srcaddr=%pI4", | |
373 | &saddr4->sin_addr.s_addr); | |
374 | else | |
375 | seq_printf(s, ",srcaddr=BAD-AF:%i", | |
376 | (int)(srcaddr->sa_family)); | |
377 | } | |
378 | ||
1f68233c EB |
379 | seq_printf(s, ",uid=%u", |
380 | from_kuid_munged(&init_user_ns, cifs_sb->mnt_uid)); | |
340481a3 JL |
381 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) |
382 | seq_printf(s, ",forceuid"); | |
4486d6ed JL |
383 | else |
384 | seq_printf(s, ",noforceuid"); | |
340481a3 | 385 | |
1f68233c EB |
386 | seq_printf(s, ",gid=%u", |
387 | from_kgid_munged(&init_user_ns, cifs_sb->mnt_gid)); | |
340481a3 JL |
388 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) |
389 | seq_printf(s, ",forcegid"); | |
4486d6ed JL |
390 | else |
391 | seq_printf(s, ",noforcegid"); | |
8616e0fc | 392 | |
61f98ffd | 393 | cifs_show_address(s, tcon->ses->server); |
1da177e4 | 394 | |
8616e0fc | 395 | if (!tcon->unix_ext) |
5206efd6 | 396 | seq_printf(s, ",file_mode=0%ho,dir_mode=0%ho", |
2b280fab SF |
397 | cifs_sb->mnt_file_mode, |
398 | cifs_sb->mnt_dir_mode); | |
8616e0fc JL |
399 | if (tcon->seal) |
400 | seq_printf(s, ",seal"); | |
401 | if (tcon->nocase) | |
402 | seq_printf(s, ",nocase"); | |
403 | if (tcon->retry) | |
404 | seq_printf(s, ",hard"); | |
d4ffff1f PS |
405 | if (tcon->unix_ext) |
406 | seq_printf(s, ",unix"); | |
407 | else | |
408 | seq_printf(s, ",nounix"); | |
8616e0fc JL |
409 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) |
410 | seq_printf(s, ",posixpaths"); | |
411 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) | |
412 | seq_printf(s, ",setuids"); | |
413 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) | |
414 | seq_printf(s, ",serverino"); | |
d4ffff1f PS |
415 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD) |
416 | seq_printf(s, ",rwpidforward"); | |
417 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) | |
418 | seq_printf(s, ",forcemand"); | |
8616e0fc JL |
419 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) |
420 | seq_printf(s, ",nouser_xattr"); | |
421 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR) | |
422 | seq_printf(s, ",mapchars"); | |
423 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) | |
424 | seq_printf(s, ",sfu"); | |
425 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) | |
426 | seq_printf(s, ",nobrl"); | |
427 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) | |
428 | seq_printf(s, ",cifsacl"); | |
429 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) | |
430 | seq_printf(s, ",dynperm"); | |
34c80b1d | 431 | if (root->d_sb->s_flags & MS_POSIXACL) |
8616e0fc | 432 | seq_printf(s, ",acl"); |
736a3320 SM |
433 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) |
434 | seq_printf(s, ",mfsymlinks"); | |
476428f8 SJ |
435 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE) |
436 | seq_printf(s, ",fsc"); | |
71c424ba SF |
437 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC) |
438 | seq_printf(s, ",nostrictsync"); | |
439 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) | |
440 | seq_printf(s, ",noperm"); | |
3c7c87fd | 441 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPUID) |
1f68233c EB |
442 | seq_printf(s, ",backupuid=%u", |
443 | from_kuid_munged(&init_user_ns, | |
444 | cifs_sb->mnt_backupuid)); | |
3c7c87fd | 445 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPGID) |
1f68233c EB |
446 | seq_printf(s, ",backupgid=%u", |
447 | from_kgid_munged(&init_user_ns, | |
448 | cifs_sb->mnt_backupgid)); | |
8616e0fc | 449 | |
28f88810 SP |
450 | seq_printf(s, ",rsize=%u", cifs_sb->rsize); |
451 | seq_printf(s, ",wsize=%u", cifs_sb->wsize); | |
6d20e840 | 452 | /* convert actimeo and display it in seconds */ |
156d1790 | 453 | seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ); |
8616e0fc | 454 | |
1da177e4 LT |
455 | return 0; |
456 | } | |
457 | ||
42faad99 | 458 | static void cifs_umount_begin(struct super_block *sb) |
68058e75 | 459 | { |
42faad99 | 460 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
96daf2b0 | 461 | struct cifs_tcon *tcon; |
68058e75 | 462 | |
4523cc30 | 463 | if (cifs_sb == NULL) |
9e2e85f8 SF |
464 | return; |
465 | ||
0d424ad0 | 466 | tcon = cifs_sb_master_tcon(cifs_sb); |
f1987b44 | 467 | |
3f9bcca7 | 468 | spin_lock(&cifs_tcp_ses_lock); |
ad8034f1 SF |
469 | if ((tcon->tc_count > 1) || (tcon->tidStatus == CifsExiting)) { |
470 | /* we have other mounts to same share or we have | |
471 | already tried to force umount this and woken up | |
472 | all waiting network requests, nothing to do */ | |
3f9bcca7 | 473 | spin_unlock(&cifs_tcp_ses_lock); |
ad8034f1 SF |
474 | return; |
475 | } else if (tcon->tc_count == 1) | |
5e1253b5 | 476 | tcon->tidStatus = CifsExiting; |
3f9bcca7 | 477 | spin_unlock(&cifs_tcp_ses_lock); |
5e1253b5 | 478 | |
3a5ff61c | 479 | /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */ |
7b7abfe3 | 480 | /* cancel_notify_requests(tcon); */ |
50c2f753 | 481 | if (tcon->ses && tcon->ses->server) { |
b6b38f70 | 482 | cFYI(1, "wake up tasks now - umount begin not complete"); |
9e2e85f8 | 483 | wake_up_all(&tcon->ses->server->request_q); |
6ab16d24 SF |
484 | wake_up_all(&tcon->ses->server->response_q); |
485 | msleep(1); /* yield */ | |
486 | /* we have to kick the requests once more */ | |
487 | wake_up_all(&tcon->ses->server->response_q); | |
488 | msleep(1); | |
5e1253b5 | 489 | } |
68058e75 SF |
490 | |
491 | return; | |
492 | } | |
68058e75 | 493 | |
bf97d287 | 494 | #ifdef CONFIG_CIFS_STATS2 |
64132379 | 495 | static int cifs_show_stats(struct seq_file *s, struct dentry *root) |
bf97d287 SF |
496 | { |
497 | /* BB FIXME */ | |
498 | return 0; | |
499 | } | |
500 | #endif | |
501 | ||
1da177e4 LT |
502 | static int cifs_remount(struct super_block *sb, int *flags, char *data) |
503 | { | |
504 | *flags |= MS_NODIRATIME; | |
505 | return 0; | |
506 | } | |
507 | ||
45321ac5 | 508 | static int cifs_drop_inode(struct inode *inode) |
12420ac3 JL |
509 | { |
510 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
511 | ||
45321ac5 AV |
512 | /* no serverino => unconditional eviction */ |
513 | return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) || | |
514 | generic_drop_inode(inode); | |
12420ac3 JL |
515 | } |
516 | ||
ee9b6d61 | 517 | static const struct super_operations cifs_super_ops = { |
1da177e4 LT |
518 | .statfs = cifs_statfs, |
519 | .alloc_inode = cifs_alloc_inode, | |
520 | .destroy_inode = cifs_destroy_inode, | |
12420ac3 | 521 | .drop_inode = cifs_drop_inode, |
b57922d9 | 522 | .evict_inode = cifs_evict_inode, |
12420ac3 JL |
523 | /* .delete_inode = cifs_delete_inode, */ /* Do not need above |
524 | function unless later we add lazy close of inodes or unless the | |
50c2f753 SF |
525 | kernel forgets to call us with the same number of releases (closes) |
526 | as opens */ | |
1da177e4 | 527 | .show_options = cifs_show_options, |
7b7abfe3 | 528 | .umount_begin = cifs_umount_begin, |
1da177e4 | 529 | .remount_fs = cifs_remount, |
bf97d287 | 530 | #ifdef CONFIG_CIFS_STATS2 |
f46d3e11 | 531 | .show_stats = cifs_show_stats, |
bf97d287 | 532 | #endif |
1da177e4 LT |
533 | }; |
534 | ||
f87d39d9 SF |
535 | /* |
536 | * Get root dentry from superblock according to prefix path mount option. | |
537 | * Return dentry with refcount + 1 on success and NULL otherwise. | |
538 | */ | |
539 | static struct dentry * | |
540 | cifs_get_root(struct smb_vol *vol, struct super_block *sb) | |
541 | { | |
fec11dd9 | 542 | struct dentry *dentry; |
f87d39d9 | 543 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
fec11dd9 AV |
544 | char *full_path = NULL; |
545 | char *s, *p; | |
f87d39d9 SF |
546 | char sep; |
547 | ||
6d3ea7e4 SF |
548 | full_path = cifs_build_path_to_root(vol, cifs_sb, |
549 | cifs_sb_master_tcon(cifs_sb)); | |
f87d39d9 | 550 | if (full_path == NULL) |
9403c9c5 | 551 | return ERR_PTR(-ENOMEM); |
f87d39d9 SF |
552 | |
553 | cFYI(1, "Get root dentry for %s", full_path); | |
554 | ||
f87d39d9 | 555 | sep = CIFS_DIR_SEP(cifs_sb); |
fec11dd9 AV |
556 | dentry = dget(sb->s_root); |
557 | p = s = full_path; | |
558 | ||
559 | do { | |
560 | struct inode *dir = dentry->d_inode; | |
561 | struct dentry *child; | |
562 | ||
5b980b01 PS |
563 | if (!dir) { |
564 | dput(dentry); | |
565 | dentry = ERR_PTR(-ENOENT); | |
566 | break; | |
567 | } | |
568 | ||
fec11dd9 AV |
569 | /* skip separators */ |
570 | while (*s == sep) | |
571 | s++; | |
572 | if (!*s) | |
573 | break; | |
574 | p = s++; | |
575 | /* next separator */ | |
576 | while (*s && *s != sep) | |
577 | s++; | |
578 | ||
579 | mutex_lock(&dir->i_mutex); | |
580 | child = lookup_one_len(p, dentry, s - p); | |
581 | mutex_unlock(&dir->i_mutex); | |
582 | dput(dentry); | |
583 | dentry = child; | |
584 | } while (!IS_ERR(dentry)); | |
f87d39d9 | 585 | kfree(full_path); |
fec11dd9 | 586 | return dentry; |
f87d39d9 SF |
587 | } |
588 | ||
ee01a14d AV |
589 | static int cifs_set_super(struct super_block *sb, void *data) |
590 | { | |
591 | struct cifs_mnt_data *mnt_data = data; | |
592 | sb->s_fs_info = mnt_data->cifs_sb; | |
593 | return set_anon_super(sb, NULL); | |
594 | } | |
595 | ||
d753ed97 AV |
596 | static struct dentry * |
597 | cifs_do_mount(struct file_system_type *fs_type, | |
724d9f1c | 598 | int flags, const char *dev_name, void *data) |
1da177e4 LT |
599 | { |
600 | int rc; | |
db719222 | 601 | struct super_block *sb; |
724d9f1c PS |
602 | struct cifs_sb_info *cifs_sb; |
603 | struct smb_vol *volume_info; | |
25c7f41e | 604 | struct cifs_mnt_data mnt_data; |
724d9f1c | 605 | struct dentry *root; |
1da177e4 | 606 | |
b6b38f70 | 607 | cFYI(1, "Devname: %s flags: %d ", dev_name, flags); |
1da177e4 | 608 | |
04db79b0 JL |
609 | volume_info = cifs_get_volume_info((char *)data, dev_name); |
610 | if (IS_ERR(volume_info)) | |
611 | return ERR_CAST(volume_info); | |
724d9f1c PS |
612 | |
613 | cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL); | |
614 | if (cifs_sb == NULL) { | |
615 | root = ERR_PTR(-ENOMEM); | |
5c4f1ad7 | 616 | goto out_nls; |
724d9f1c PS |
617 | } |
618 | ||
5d3bc605 AV |
619 | cifs_sb->mountdata = kstrndup(data, PAGE_SIZE, GFP_KERNEL); |
620 | if (cifs_sb->mountdata == NULL) { | |
621 | root = ERR_PTR(-ENOMEM); | |
5c4f1ad7 | 622 | goto out_cifs_sb; |
5d3bc605 AV |
623 | } |
624 | ||
724d9f1c PS |
625 | cifs_setup_cifs_sb(volume_info, cifs_sb); |
626 | ||
97d1152a AV |
627 | rc = cifs_mount(cifs_sb, volume_info); |
628 | if (rc) { | |
629 | if (!(flags & MS_SILENT)) | |
630 | cERROR(1, "cifs_mount failed w/return code = %d", rc); | |
631 | root = ERR_PTR(rc); | |
5c4f1ad7 | 632 | goto out_mountdata; |
97d1152a AV |
633 | } |
634 | ||
25c7f41e PS |
635 | mnt_data.vol = volume_info; |
636 | mnt_data.cifs_sb = cifs_sb; | |
637 | mnt_data.flags = flags; | |
638 | ||
9249e17f DH |
639 | /* BB should we make this contingent on mount parm? */ |
640 | flags |= MS_NODIRATIME | MS_NOATIME; | |
641 | ||
642 | sb = sget(fs_type, cifs_match_super, cifs_set_super, flags, &mnt_data); | |
724d9f1c | 643 | if (IS_ERR(sb)) { |
724d9f1c | 644 | root = ERR_CAST(sb); |
97d1152a | 645 | cifs_umount(cifs_sb); |
d757d71b | 646 | goto out; |
724d9f1c | 647 | } |
1da177e4 | 648 | |
ee01a14d | 649 | if (sb->s_root) { |
25c7f41e | 650 | cFYI(1, "Use existing superblock"); |
97d1152a | 651 | cifs_umount(cifs_sb); |
5c4f1ad7 | 652 | } else { |
5c4f1ad7 AV |
653 | rc = cifs_read_super(sb); |
654 | if (rc) { | |
655 | root = ERR_PTR(rc); | |
656 | goto out_super; | |
657 | } | |
b2e5cd33 | 658 | |
5c4f1ad7 | 659 | sb->s_flags |= MS_ACTIVE; |
1da177e4 | 660 | } |
724d9f1c | 661 | |
f87d39d9 | 662 | root = cifs_get_root(volume_info, sb); |
9403c9c5 | 663 | if (IS_ERR(root)) |
f87d39d9 | 664 | goto out_super; |
25c7f41e | 665 | |
f87d39d9 | 666 | cFYI(1, "dentry root is: %p", root); |
641a58d6 | 667 | goto out; |
724d9f1c | 668 | |
641a58d6 | 669 | out_super: |
641a58d6 | 670 | deactivate_locked_super(sb); |
641a58d6 | 671 | out: |
f9e59bcb | 672 | cifs_cleanup_volume_info(volume_info); |
724d9f1c | 673 | return root; |
5c4f1ad7 AV |
674 | |
675 | out_mountdata: | |
676 | kfree(cifs_sb->mountdata); | |
677 | out_cifs_sb: | |
678 | kfree(cifs_sb); | |
679 | out_nls: | |
680 | unload_nls(volume_info->local_nls); | |
681 | goto out; | |
1da177e4 LT |
682 | } |
683 | ||
027445c3 BP |
684 | static ssize_t cifs_file_aio_write(struct kiocb *iocb, const struct iovec *iov, |
685 | unsigned long nr_segs, loff_t pos) | |
1da177e4 | 686 | { |
e6a00296 | 687 | struct inode *inode = iocb->ki_filp->f_path.dentry->d_inode; |
1da177e4 | 688 | ssize_t written; |
72432ffc | 689 | int rc; |
1da177e4 | 690 | |
027445c3 | 691 | written = generic_file_aio_write(iocb, iov, nr_segs, pos); |
72432ffc PS |
692 | |
693 | if (CIFS_I(inode)->clientCanCacheAll) | |
694 | return written; | |
695 | ||
696 | rc = filemap_fdatawrite(inode->i_mapping); | |
697 | if (rc) | |
698 | cFYI(1, "cifs_file_aio_write: %d rc on %p inode", rc, inode); | |
699 | ||
1da177e4 LT |
700 | return written; |
701 | } | |
702 | ||
965c8e59 | 703 | static loff_t cifs_llseek(struct file *file, loff_t offset, int whence) |
c32a0b68 | 704 | { |
06222e49 | 705 | /* |
965c8e59 | 706 | * whence == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate |
06222e49 JB |
707 | * the cached file length |
708 | */ | |
965c8e59 | 709 | if (whence != SEEK_SET && whence != SEEK_CUR) { |
6feb9891 PS |
710 | int rc; |
711 | struct inode *inode = file->f_path.dentry->d_inode; | |
712 | ||
713 | /* | |
714 | * We need to be sure that all dirty pages are written and the | |
715 | * server has the newest file length. | |
716 | */ | |
717 | if (!CIFS_I(inode)->clientCanCacheRead && inode->i_mapping && | |
718 | inode->i_mapping->nrpages != 0) { | |
719 | rc = filemap_fdatawait(inode->i_mapping); | |
156ecb2d SF |
720 | if (rc) { |
721 | mapping_set_error(inode->i_mapping, rc); | |
722 | return rc; | |
723 | } | |
6feb9891 PS |
724 | } |
725 | /* | |
726 | * Some applications poll for the file length in this strange | |
727 | * way so we must seek to end on non-oplocked files by | |
728 | * setting the revalidate time to zero. | |
729 | */ | |
730 | CIFS_I(inode)->time = 0; | |
731 | ||
732 | rc = cifs_revalidate_file_attr(file); | |
733 | if (rc < 0) | |
734 | return (loff_t)rc; | |
c32a0b68 | 735 | } |
965c8e59 | 736 | return generic_file_llseek(file, offset, whence); |
c32a0b68 SF |
737 | } |
738 | ||
84210e91 SF |
739 | static int cifs_setlease(struct file *file, long arg, struct file_lock **lease) |
740 | { | |
b89f4321 AB |
741 | /* note that this is called by vfs setlease with lock_flocks held |
742 | to protect *lease from going away */ | |
84210e91 | 743 | struct inode *inode = file->f_path.dentry->d_inode; |
ba00ba64 | 744 | struct cifsFileInfo *cfile = file->private_data; |
84210e91 SF |
745 | |
746 | if (!(S_ISREG(inode->i_mode))) | |
747 | return -EINVAL; | |
748 | ||
749 | /* check if file is oplocked */ | |
750 | if (((arg == F_RDLCK) && | |
751 | (CIFS_I(inode)->clientCanCacheRead)) || | |
752 | ((arg == F_WRLCK) && | |
753 | (CIFS_I(inode)->clientCanCacheAll))) | |
754 | return generic_setlease(file, arg, lease); | |
13cfb733 JL |
755 | else if (tlink_tcon(cfile->tlink)->local_lease && |
756 | !CIFS_I(inode)->clientCanCacheRead) | |
84210e91 SF |
757 | /* If the server claims to support oplock on this |
758 | file, then we still need to check oplock even | |
759 | if the local_lease mount option is set, but there | |
760 | are servers which do not support oplock for which | |
761 | this mount option may be useful if the user | |
762 | knows that the file won't be changed on the server | |
763 | by anyone else */ | |
764 | return generic_setlease(file, arg, lease); | |
51ee4b84 | 765 | else |
84210e91 SF |
766 | return -EAGAIN; |
767 | } | |
84210e91 | 768 | |
e6ab1582 | 769 | struct file_system_type cifs_fs_type = { |
1da177e4 LT |
770 | .owner = THIS_MODULE, |
771 | .name = "cifs", | |
d753ed97 | 772 | .mount = cifs_do_mount, |
6d686175 | 773 | .kill_sb = cifs_kill_sb, |
1da177e4 LT |
774 | /* .fs_flags */ |
775 | }; | |
754661f1 | 776 | const struct inode_operations cifs_dir_inode_ops = { |
1da177e4 | 777 | .create = cifs_create, |
d2c12719 | 778 | .atomic_open = cifs_atomic_open, |
1da177e4 LT |
779 | .lookup = cifs_lookup, |
780 | .getattr = cifs_getattr, | |
781 | .unlink = cifs_unlink, | |
782 | .link = cifs_hardlink, | |
783 | .mkdir = cifs_mkdir, | |
784 | .rmdir = cifs_rmdir, | |
785 | .rename = cifs_rename, | |
786 | .permission = cifs_permission, | |
787 | /* revalidate:cifs_revalidate, */ | |
788 | .setattr = cifs_setattr, | |
789 | .symlink = cifs_symlink, | |
790 | .mknod = cifs_mknod, | |
791 | #ifdef CONFIG_CIFS_XATTR | |
792 | .setxattr = cifs_setxattr, | |
793 | .getxattr = cifs_getxattr, | |
794 | .listxattr = cifs_listxattr, | |
795 | .removexattr = cifs_removexattr, | |
796 | #endif | |
797 | }; | |
798 | ||
754661f1 | 799 | const struct inode_operations cifs_file_inode_ops = { |
1da177e4 LT |
800 | /* revalidate:cifs_revalidate, */ |
801 | .setattr = cifs_setattr, | |
802 | .getattr = cifs_getattr, /* do we need this anymore? */ | |
803 | .rename = cifs_rename, | |
804 | .permission = cifs_permission, | |
805 | #ifdef CONFIG_CIFS_XATTR | |
806 | .setxattr = cifs_setxattr, | |
807 | .getxattr = cifs_getxattr, | |
808 | .listxattr = cifs_listxattr, | |
809 | .removexattr = cifs_removexattr, | |
50c2f753 | 810 | #endif |
1da177e4 LT |
811 | }; |
812 | ||
754661f1 | 813 | const struct inode_operations cifs_symlink_inode_ops = { |
50c2f753 | 814 | .readlink = generic_readlink, |
1da177e4 LT |
815 | .follow_link = cifs_follow_link, |
816 | .put_link = cifs_put_link, | |
817 | .permission = cifs_permission, | |
818 | /* BB add the following two eventually */ | |
819 | /* revalidate: cifs_revalidate, | |
820 | setattr: cifs_notify_change, *//* BB do we need notify change */ | |
821 | #ifdef CONFIG_CIFS_XATTR | |
822 | .setxattr = cifs_setxattr, | |
823 | .getxattr = cifs_getxattr, | |
824 | .listxattr = cifs_listxattr, | |
825 | .removexattr = cifs_removexattr, | |
50c2f753 | 826 | #endif |
1da177e4 LT |
827 | }; |
828 | ||
4b6f5d20 | 829 | const struct file_operations cifs_file_ops = { |
87c89dd7 SF |
830 | .read = do_sync_read, |
831 | .write = do_sync_write, | |
87c89dd7 SF |
832 | .aio_read = generic_file_aio_read, |
833 | .aio_write = cifs_file_aio_write, | |
1da177e4 LT |
834 | .open = cifs_open, |
835 | .release = cifs_close, | |
836 | .lock = cifs_lock, | |
837 | .fsync = cifs_fsync, | |
838 | .flush = cifs_flush, | |
839 | .mmap = cifs_file_mmap, | |
5ffc4ef4 | 840 | .splice_read = generic_file_splice_read, |
c32a0b68 | 841 | .llseek = cifs_llseek, |
c67593a0 | 842 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 843 | .unlocked_ioctl = cifs_ioctl, |
c67593a0 | 844 | #endif /* CONFIG_CIFS_POSIX */ |
84210e91 | 845 | .setlease = cifs_setlease, |
1da177e4 LT |
846 | }; |
847 | ||
8be7e6ba PS |
848 | const struct file_operations cifs_file_strict_ops = { |
849 | .read = do_sync_read, | |
850 | .write = do_sync_write, | |
a70307ee | 851 | .aio_read = cifs_strict_readv, |
72432ffc | 852 | .aio_write = cifs_strict_writev, |
8be7e6ba PS |
853 | .open = cifs_open, |
854 | .release = cifs_close, | |
855 | .lock = cifs_lock, | |
856 | .fsync = cifs_strict_fsync, | |
857 | .flush = cifs_flush, | |
7a6a19b1 | 858 | .mmap = cifs_file_strict_mmap, |
8be7e6ba PS |
859 | .splice_read = generic_file_splice_read, |
860 | .llseek = cifs_llseek, | |
861 | #ifdef CONFIG_CIFS_POSIX | |
862 | .unlocked_ioctl = cifs_ioctl, | |
863 | #endif /* CONFIG_CIFS_POSIX */ | |
864 | .setlease = cifs_setlease, | |
865 | }; | |
866 | ||
4b6f5d20 | 867 | const struct file_operations cifs_file_direct_ops = { |
0b81c1c4 PS |
868 | /* BB reevaluate whether they can be done with directio, no cache */ |
869 | .read = do_sync_read, | |
870 | .write = do_sync_write, | |
871 | .aio_read = cifs_user_readv, | |
872 | .aio_write = cifs_user_writev, | |
1da177e4 LT |
873 | .open = cifs_open, |
874 | .release = cifs_close, | |
875 | .lock = cifs_lock, | |
876 | .fsync = cifs_fsync, | |
877 | .flush = cifs_flush, | |
a994b8fa | 878 | .mmap = cifs_file_mmap, |
5ffc4ef4 | 879 | .splice_read = generic_file_splice_read, |
c67593a0 | 880 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 881 | .unlocked_ioctl = cifs_ioctl, |
c67593a0 | 882 | #endif /* CONFIG_CIFS_POSIX */ |
c32a0b68 | 883 | .llseek = cifs_llseek, |
84210e91 | 884 | .setlease = cifs_setlease, |
1da177e4 | 885 | }; |
8be7e6ba | 886 | |
4b6f5d20 | 887 | const struct file_operations cifs_file_nobrl_ops = { |
87c89dd7 SF |
888 | .read = do_sync_read, |
889 | .write = do_sync_write, | |
87c89dd7 SF |
890 | .aio_read = generic_file_aio_read, |
891 | .aio_write = cifs_file_aio_write, | |
892 | .open = cifs_open, | |
893 | .release = cifs_close, | |
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, |
8b94bcb9 | 899 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 900 | .unlocked_ioctl = cifs_ioctl, |
8b94bcb9 | 901 | #endif /* CONFIG_CIFS_POSIX */ |
84210e91 | 902 | .setlease = cifs_setlease, |
8b94bcb9 SF |
903 | }; |
904 | ||
8be7e6ba PS |
905 | const struct file_operations cifs_file_strict_nobrl_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 | .fsync = cifs_strict_fsync, | |
913 | .flush = cifs_flush, | |
7a6a19b1 | 914 | .mmap = cifs_file_strict_mmap, |
8be7e6ba PS |
915 | .splice_read = generic_file_splice_read, |
916 | .llseek = cifs_llseek, | |
917 | #ifdef CONFIG_CIFS_POSIX | |
918 | .unlocked_ioctl = cifs_ioctl, | |
919 | #endif /* CONFIG_CIFS_POSIX */ | |
920 | .setlease = cifs_setlease, | |
921 | }; | |
922 | ||
4b6f5d20 | 923 | const struct file_operations cifs_file_direct_nobrl_ops = { |
0b81c1c4 PS |
924 | /* BB reevaluate whether they can be done with directio, no cache */ |
925 | .read = do_sync_read, | |
926 | .write = do_sync_write, | |
927 | .aio_read = cifs_user_readv, | |
928 | .aio_write = cifs_user_writev, | |
87c89dd7 SF |
929 | .open = cifs_open, |
930 | .release = cifs_close, | |
931 | .fsync = cifs_fsync, | |
932 | .flush = cifs_flush, | |
810627a0 | 933 | .mmap = cifs_file_mmap, |
5ffc4ef4 | 934 | .splice_read = generic_file_splice_read, |
8b94bcb9 | 935 | #ifdef CONFIG_CIFS_POSIX |
f9ddcca4 | 936 | .unlocked_ioctl = cifs_ioctl, |
8b94bcb9 | 937 | #endif /* CONFIG_CIFS_POSIX */ |
c32a0b68 | 938 | .llseek = cifs_llseek, |
84210e91 | 939 | .setlease = cifs_setlease, |
8b94bcb9 | 940 | }; |
1da177e4 | 941 | |
4b6f5d20 | 942 | const struct file_operations cifs_dir_ops = { |
1da177e4 LT |
943 | .readdir = cifs_readdir, |
944 | .release = cifs_closedir, | |
945 | .read = generic_read_dir, | |
f9ddcca4 | 946 | .unlocked_ioctl = cifs_ioctl, |
3222a3e5 | 947 | .llseek = generic_file_llseek, |
1da177e4 LT |
948 | }; |
949 | ||
950 | static void | |
51cc5068 | 951 | cifs_init_once(void *inode) |
1da177e4 LT |
952 | { |
953 | struct cifsInodeInfo *cifsi = inode; | |
954 | ||
a35afb83 | 955 | inode_init_once(&cifsi->vfs_inode); |
1b4b55a1 | 956 | init_rwsem(&cifsi->lock_sem); |
1da177e4 LT |
957 | } |
958 | ||
959 | static int | |
960 | cifs_init_inodecache(void) | |
961 | { | |
962 | cifs_inode_cachep = kmem_cache_create("cifs_inode_cache", | |
26f57364 | 963 | sizeof(struct cifsInodeInfo), |
fffb60f9 PJ |
964 | 0, (SLAB_RECLAIM_ACCOUNT| |
965 | SLAB_MEM_SPREAD), | |
20c2df83 | 966 | cifs_init_once); |
1da177e4 LT |
967 | if (cifs_inode_cachep == NULL) |
968 | return -ENOMEM; | |
969 | ||
970 | return 0; | |
971 | } | |
972 | ||
973 | static void | |
974 | cifs_destroy_inodecache(void) | |
975 | { | |
8c0a8537 KS |
976 | /* |
977 | * Make sure all delayed rcu free inodes are flushed before we | |
978 | * destroy cache. | |
979 | */ | |
980 | rcu_barrier(); | |
1a1d92c1 | 981 | kmem_cache_destroy(cifs_inode_cachep); |
1da177e4 LT |
982 | } |
983 | ||
984 | static int | |
985 | cifs_init_request_bufs(void) | |
986 | { | |
3792c173 PS |
987 | size_t max_hdr_size = MAX_CIFS_HDR_SIZE; |
988 | #ifdef CONFIG_CIFS_SMB2 | |
989 | /* | |
990 | * SMB2 maximum header size is bigger than CIFS one - no problems to | |
991 | * allocate some more bytes for CIFS. | |
992 | */ | |
993 | max_hdr_size = MAX_SMB2_HDR_SIZE; | |
994 | #endif | |
4523cc30 | 995 | if (CIFSMaxBufSize < 8192) { |
1da177e4 LT |
996 | /* Buffer size can not be smaller than 2 * PATH_MAX since maximum |
997 | Unicode path name has to fit in any SMB/CIFS path based frames */ | |
998 | CIFSMaxBufSize = 8192; | |
999 | } else if (CIFSMaxBufSize > 1024*127) { | |
1000 | CIFSMaxBufSize = 1024 * 127; | |
1001 | } else { | |
1002 | CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/ | |
1003 | } | |
b6b38f70 | 1004 | /* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */ |
1da177e4 | 1005 | cifs_req_cachep = kmem_cache_create("cifs_request", |
3792c173 | 1006 | CIFSMaxBufSize + max_hdr_size, 0, |
20c2df83 | 1007 | SLAB_HWCACHE_ALIGN, NULL); |
1da177e4 LT |
1008 | if (cifs_req_cachep == NULL) |
1009 | return -ENOMEM; | |
1010 | ||
4523cc30 | 1011 | if (cifs_min_rcv < 1) |
1da177e4 LT |
1012 | cifs_min_rcv = 1; |
1013 | else if (cifs_min_rcv > 64) { | |
1014 | cifs_min_rcv = 64; | |
b6b38f70 | 1015 | cERROR(1, "cifs_min_rcv set to maximum (64)"); |
1da177e4 LT |
1016 | } |
1017 | ||
93d2341c MD |
1018 | cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv, |
1019 | cifs_req_cachep); | |
1da177e4 | 1020 | |
4523cc30 | 1021 | if (cifs_req_poolp == NULL) { |
1da177e4 LT |
1022 | kmem_cache_destroy(cifs_req_cachep); |
1023 | return -ENOMEM; | |
1024 | } | |
ec637e3f | 1025 | /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and |
1da177e4 LT |
1026 | almost all handle based requests (but not write response, nor is it |
1027 | sufficient for path based requests). A smaller size would have | |
50c2f753 | 1028 | been more efficient (compacting multiple slab items on one 4k page) |
1da177e4 LT |
1029 | for the case in which debug was on, but this larger size allows |
1030 | more SMBs to use small buffer alloc and is still much more | |
6dc0f87e | 1031 | efficient to alloc 1 per page off the slab compared to 17K (5page) |
1da177e4 LT |
1032 | alloc of large cifs buffers even when page debugging is on */ |
1033 | cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq", | |
6dc0f87e | 1034 | MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN, |
20c2df83 | 1035 | NULL); |
1da177e4 LT |
1036 | if (cifs_sm_req_cachep == NULL) { |
1037 | mempool_destroy(cifs_req_poolp); | |
1038 | kmem_cache_destroy(cifs_req_cachep); | |
6dc0f87e | 1039 | return -ENOMEM; |
1da177e4 LT |
1040 | } |
1041 | ||
4523cc30 | 1042 | if (cifs_min_small < 2) |
1da177e4 LT |
1043 | cifs_min_small = 2; |
1044 | else if (cifs_min_small > 256) { | |
1045 | cifs_min_small = 256; | |
b6b38f70 | 1046 | cFYI(1, "cifs_min_small set to maximum (256)"); |
1da177e4 LT |
1047 | } |
1048 | ||
93d2341c MD |
1049 | cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small, |
1050 | cifs_sm_req_cachep); | |
1da177e4 | 1051 | |
4523cc30 | 1052 | if (cifs_sm_req_poolp == NULL) { |
1da177e4 LT |
1053 | mempool_destroy(cifs_req_poolp); |
1054 | kmem_cache_destroy(cifs_req_cachep); | |
1055 | kmem_cache_destroy(cifs_sm_req_cachep); | |
1056 | return -ENOMEM; | |
1057 | } | |
1058 | ||
1059 | return 0; | |
1060 | } | |
1061 | ||
1062 | static void | |
1063 | cifs_destroy_request_bufs(void) | |
1064 | { | |
1065 | mempool_destroy(cifs_req_poolp); | |
1a1d92c1 | 1066 | kmem_cache_destroy(cifs_req_cachep); |
1da177e4 | 1067 | mempool_destroy(cifs_sm_req_poolp); |
1a1d92c1 | 1068 | kmem_cache_destroy(cifs_sm_req_cachep); |
1da177e4 LT |
1069 | } |
1070 | ||
1071 | static int | |
1072 | cifs_init_mids(void) | |
1073 | { | |
1074 | cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids", | |
26f57364 SF |
1075 | sizeof(struct mid_q_entry), 0, |
1076 | SLAB_HWCACHE_ALIGN, NULL); | |
1da177e4 LT |
1077 | if (cifs_mid_cachep == NULL) |
1078 | return -ENOMEM; | |
1079 | ||
93d2341c MD |
1080 | /* 3 is a reasonable minimum number of simultaneous operations */ |
1081 | cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep); | |
4523cc30 | 1082 | if (cifs_mid_poolp == NULL) { |
1da177e4 LT |
1083 | kmem_cache_destroy(cifs_mid_cachep); |
1084 | return -ENOMEM; | |
1085 | } | |
1086 | ||
1da177e4 LT |
1087 | return 0; |
1088 | } | |
1089 | ||
1090 | static void | |
1091 | cifs_destroy_mids(void) | |
1092 | { | |
1093 | mempool_destroy(cifs_mid_poolp); | |
1a1d92c1 | 1094 | kmem_cache_destroy(cifs_mid_cachep); |
1da177e4 LT |
1095 | } |
1096 | ||
1da177e4 LT |
1097 | static int __init |
1098 | init_cifs(void) | |
1099 | { | |
1100 | int rc = 0; | |
1da177e4 | 1101 | cifs_proc_init(); |
e7ddee90 | 1102 | INIT_LIST_HEAD(&cifs_tcp_ses_list); |
0eff0e26 | 1103 | #ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* unused temporarily */ |
4ca9c190 SF |
1104 | INIT_LIST_HEAD(&GlobalDnotifyReqList); |
1105 | INIT_LIST_HEAD(&GlobalDnotifyRsp_Q); | |
0eff0e26 | 1106 | #endif /* was needed for dnotify, and will be needed for inotify when VFS fix */ |
1da177e4 LT |
1107 | /* |
1108 | * Initialize Global counters | |
1109 | */ | |
1110 | atomic_set(&sesInfoAllocCount, 0); | |
1111 | atomic_set(&tconInfoAllocCount, 0); | |
6dc0f87e | 1112 | atomic_set(&tcpSesAllocCount, 0); |
1da177e4 LT |
1113 | atomic_set(&tcpSesReconnectCount, 0); |
1114 | atomic_set(&tconInfoReconnectCount, 0); | |
1115 | ||
1116 | atomic_set(&bufAllocCount, 0); | |
4498eed5 SF |
1117 | atomic_set(&smBufAllocCount, 0); |
1118 | #ifdef CONFIG_CIFS_STATS2 | |
1119 | atomic_set(&totBufAllocCount, 0); | |
1120 | atomic_set(&totSmBufAllocCount, 0); | |
1121 | #endif /* CONFIG_CIFS_STATS2 */ | |
1122 | ||
1da177e4 LT |
1123 | atomic_set(&midCount, 0); |
1124 | GlobalCurrentXid = 0; | |
1125 | GlobalTotalActiveXid = 0; | |
1126 | GlobalMaxActiveXid = 0; | |
3f9bcca7 | 1127 | spin_lock_init(&cifs_tcp_ses_lock); |
4477288a | 1128 | spin_lock_init(&cifs_file_list_lock); |
1da177e4 LT |
1129 | spin_lock_init(&GlobalMid_Lock); |
1130 | ||
b8c32dbb PS |
1131 | #ifdef CONFIG_CIFS_SMB2 |
1132 | get_random_bytes(cifs_client_guid, SMB2_CLIENT_GUID_SIZE); | |
1133 | #endif | |
1134 | ||
4523cc30 | 1135 | if (cifs_max_pending < 2) { |
1da177e4 | 1136 | cifs_max_pending = 2; |
b6b38f70 | 1137 | cFYI(1, "cifs_max_pending set to min of 2"); |
10b9b98e PS |
1138 | } else if (cifs_max_pending > CIFS_MAX_REQ) { |
1139 | cifs_max_pending = CIFS_MAX_REQ; | |
1140 | cFYI(1, "cifs_max_pending set to max of %u", CIFS_MAX_REQ); | |
1da177e4 LT |
1141 | } |
1142 | ||
da472fc8 JL |
1143 | cifsiod_wq = alloc_workqueue("cifsiod", WQ_FREEZABLE|WQ_MEM_RECLAIM, 0); |
1144 | if (!cifsiod_wq) { | |
1145 | rc = -ENOMEM; | |
1146 | goto out_clean_proc; | |
1147 | } | |
1148 | ||
f579cf3c SJ |
1149 | rc = cifs_fscache_register(); |
1150 | if (rc) | |
da472fc8 | 1151 | goto out_destroy_wq; |
f579cf3c | 1152 | |
1da177e4 | 1153 | rc = cifs_init_inodecache(); |
45af7a0f | 1154 | if (rc) |
d3bf5221 | 1155 | goto out_unreg_fscache; |
45af7a0f SF |
1156 | |
1157 | rc = cifs_init_mids(); | |
1158 | if (rc) | |
1159 | goto out_destroy_inodecache; | |
1160 | ||
1161 | rc = cifs_init_request_bufs(); | |
1162 | if (rc) | |
1163 | goto out_destroy_mids; | |
1164 | ||
84a15b93 JL |
1165 | #ifdef CONFIG_CIFS_UPCALL |
1166 | rc = register_key_type(&cifs_spnego_key_type); | |
1167 | if (rc) | |
4d79dba0 SP |
1168 | goto out_destroy_request_bufs; |
1169 | #endif /* CONFIG_CIFS_UPCALL */ | |
1170 | ||
1171 | #ifdef CONFIG_CIFS_ACL | |
1172 | rc = init_cifs_idmap(); | |
1173 | if (rc) | |
c4aca0c0 | 1174 | goto out_register_key_type; |
4d79dba0 SP |
1175 | #endif /* CONFIG_CIFS_ACL */ |
1176 | ||
1177 | rc = register_filesystem(&cifs_fs_type); | |
1178 | if (rc) | |
c4aca0c0 | 1179 | goto out_init_cifs_idmap; |
45af7a0f | 1180 | |
45af7a0f SF |
1181 | return 0; |
1182 | ||
c4aca0c0 | 1183 | out_init_cifs_idmap: |
4d79dba0 SP |
1184 | #ifdef CONFIG_CIFS_ACL |
1185 | exit_cifs_idmap(); | |
c4aca0c0 | 1186 | out_register_key_type: |
4d79dba0 | 1187 | #endif |
84a15b93 | 1188 | #ifdef CONFIG_CIFS_UPCALL |
4d79dba0 | 1189 | unregister_key_type(&cifs_spnego_key_type); |
c4aca0c0 | 1190 | out_destroy_request_bufs: |
1fc7995d | 1191 | #endif |
45af7a0f | 1192 | cifs_destroy_request_bufs(); |
d3bf5221 | 1193 | out_destroy_mids: |
45af7a0f | 1194 | cifs_destroy_mids(); |
d3bf5221 | 1195 | out_destroy_inodecache: |
45af7a0f | 1196 | cifs_destroy_inodecache(); |
d3bf5221 | 1197 | out_unreg_fscache: |
f579cf3c | 1198 | cifs_fscache_unregister(); |
da472fc8 JL |
1199 | out_destroy_wq: |
1200 | destroy_workqueue(cifsiod_wq); | |
d3bf5221 SF |
1201 | out_clean_proc: |
1202 | cifs_proc_clean(); | |
1da177e4 LT |
1203 | return rc; |
1204 | } | |
1205 | ||
1206 | static void __exit | |
1207 | exit_cifs(void) | |
1208 | { | |
b6b38f70 | 1209 | cFYI(DBG2, "exit_cifs"); |
3dd93306 | 1210 | unregister_filesystem(&cifs_fs_type); |
78d31a3a | 1211 | cifs_dfs_release_automount_timer(); |
4d79dba0 | 1212 | #ifdef CONFIG_CIFS_ACL |
4d79dba0 SP |
1213 | exit_cifs_idmap(); |
1214 | #endif | |
84a15b93 JL |
1215 | #ifdef CONFIG_CIFS_UPCALL |
1216 | unregister_key_type(&cifs_spnego_key_type); | |
1da177e4 | 1217 | #endif |
1da177e4 | 1218 | cifs_destroy_request_bufs(); |
3dd93306 JL |
1219 | cifs_destroy_mids(); |
1220 | cifs_destroy_inodecache(); | |
1221 | cifs_fscache_unregister(); | |
da472fc8 | 1222 | destroy_workqueue(cifsiod_wq); |
3dd93306 | 1223 | cifs_proc_clean(); |
1da177e4 LT |
1224 | } |
1225 | ||
1226 | MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>"); | |
6dc0f87e | 1227 | MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */ |
1da177e4 | 1228 | MODULE_DESCRIPTION |
63135e08 SF |
1229 | ("VFS to access servers complying with the SNIA CIFS Specification " |
1230 | "e.g. Samba and Windows"); | |
1da177e4 LT |
1231 | MODULE_VERSION(CIFS_VERSION); |
1232 | module_init(init_cifs) | |
1233 | module_exit(exit_cifs) |