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929be906 | 1 | // SPDX-License-Identifier: LGPL-2.1 |
1da177e4 | 2 | /* |
1da177e4 | 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 | * | |
1da177e4 LT |
9 | */ |
10 | ||
11 | /* Note that BB means BUGBUG (ie something to fix eventually) */ | |
12 | ||
13 | #include <linux/module.h> | |
14 | #include <linux/fs.h> | |
5970e15d | 15 | #include <linux/filelock.h> |
1da177e4 LT |
16 | #include <linux/mount.h> |
17 | #include <linux/slab.h> | |
18 | #include <linux/init.h> | |
19 | #include <linux/list.h> | |
20 | #include <linux/seq_file.h> | |
21 | #include <linux/vfs.h> | |
22 | #include <linux/mempool.h> | |
6ab16d24 | 23 | #include <linux/delay.h> |
45af7a0f | 24 | #include <linux/kthread.h> |
7dfb7103 | 25 | #include <linux/freezer.h> |
fec11dd9 | 26 | #include <linux/namei.h> |
b8c32dbb | 27 | #include <linux/random.h> |
705bcfcb | 28 | #include <linux/splice.h> |
c6e970a0 | 29 | #include <linux/uuid.h> |
a9ae008f | 30 | #include <linux/xattr.h> |
dea29037 | 31 | #include <uapi/linux/magic.h> |
3eb9a889 | 32 | #include <net/ipv6.h> |
1da177e4 LT |
33 | #include "cifsfs.h" |
34 | #include "cifspdu.h" | |
35 | #define DECLARE_GLOBALS_HERE | |
36 | #include "cifsglob.h" | |
37 | #include "cifsproto.h" | |
38 | #include "cifs_debug.h" | |
39 | #include "cifs_fs_sb.h" | |
40 | #include <linux/mm.h> | |
84a15b93 | 41 | #include <linux/key-type.h> |
e545937a | 42 | #include "cifs_spnego.h" |
f579cf3c | 43 | #include "fscache.h" |
1c780228 PA |
44 | #ifdef CONFIG_CIFS_DFS_UPCALL |
45 | #include "dfs_cache.h" | |
46 | #endif | |
06f08dab SC |
47 | #ifdef CONFIG_CIFS_SWN_UPCALL |
48 | #include "netlink.h" | |
49 | #endif | |
3fa1c6d1 | 50 | #include "fs_context.h" |
05b98fd2 | 51 | #include "cached_dir.h" |
1da177e4 | 52 | |
cb7a69e6 DD |
53 | /* |
54 | * DOS dates from 1980/1/1 through 2107/12/31 | |
55 | * Protocol specifications indicate the range should be to 119, which | |
56 | * limits maximum year to 2099. But this range has not been checked. | |
57 | */ | |
58 | #define SMB_DATE_MAX (127<<9 | 12<<5 | 31) | |
59 | #define SMB_DATE_MIN (0<<9 | 1<<5 | 1) | |
60 | #define SMB_TIME_MAX (23<<11 | 59<<5 | 29) | |
61 | ||
1da177e4 | 62 | int cifsFYI = 0; |
1404297e | 63 | bool traceSMB; |
e7504734 | 64 | bool enable_oplocks = true; |
1404297e KC |
65 | bool linuxExtEnabled = true; |
66 | bool lookupCacheEnabled = true; | |
f92a720e | 67 | bool disable_legacy_dialects; /* false by default */ |
fee742b5 | 68 | bool enable_gcm_256 = true; |
fbfd0b46 | 69 | bool require_gcm_256; /* false by default */ |
53d31a3f | 70 | bool enable_negotiate_signing; /* false by default */ |
04912d6a | 71 | unsigned int global_secflags = CIFSSEC_DEF; |
3979877e | 72 | /* unsigned int ntlmv2_support = 0; */ |
1da177e4 | 73 | unsigned int sign_CIFS_PDUs = 1; |
1bfa25ee SF |
74 | |
75 | /* | |
76 | * Global transaction id (XID) information | |
77 | */ | |
78 | unsigned int GlobalCurrentXid; /* protected by GlobalMid_Sem */ | |
79 | unsigned int GlobalTotalActiveXid; /* prot by GlobalMid_Sem */ | |
80 | unsigned int GlobalMaxActiveXid; /* prot by GlobalMid_Sem */ | |
81 | spinlock_t GlobalMid_Lock; /* protects above & list operations on midQ entries */ | |
82 | ||
83 | /* | |
84 | * Global counters, updated atomically | |
85 | */ | |
86 | atomic_t sesInfoAllocCount; | |
87 | atomic_t tconInfoAllocCount; | |
88 | atomic_t tcpSesNextId; | |
89 | atomic_t tcpSesAllocCount; | |
90 | atomic_t tcpSesReconnectCount; | |
91 | atomic_t tconInfoReconnectCount; | |
92 | ||
c2c17ddb SF |
93 | atomic_t mid_count; |
94 | atomic_t buf_alloc_count; | |
95 | atomic_t small_buf_alloc_count; | |
96 | #ifdef CONFIG_CIFS_STATS2 | |
97 | atomic_t total_buf_alloc_count; | |
98 | atomic_t total_small_buf_alloc_count; | |
99 | #endif/* STATS2 */ | |
89e42f49 SF |
100 | struct list_head cifs_tcp_ses_list; |
101 | spinlock_t cifs_tcp_ses_lock; | |
ee9b6d61 | 102 | static const struct super_operations cifs_super_ops; |
1da177e4 | 103 | unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE; |
cb978ac8 | 104 | module_param(CIFSMaxBufSize, uint, 0444); |
11911b95 SF |
105 | MODULE_PARM_DESC(CIFSMaxBufSize, "Network buffer size (not including header) " |
106 | "for CIFS requests. " | |
63135e08 | 107 | "Default: 16384 Range: 8192 to 130048"); |
1da177e4 | 108 | unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL; |
cb978ac8 | 109 | module_param(cifs_min_rcv, uint, 0444); |
63135e08 SF |
110 | MODULE_PARM_DESC(cifs_min_rcv, "Network buffers in pool. Default: 4 Range: " |
111 | "1 to 64"); | |
1da177e4 | 112 | unsigned int cifs_min_small = 30; |
cb978ac8 | 113 | module_param(cifs_min_small, uint, 0444); |
63135e08 SF |
114 | MODULE_PARM_DESC(cifs_min_small, "Small network buffers in pool. Default: 30 " |
115 | "Range: 2 to 256"); | |
1da177e4 | 116 | unsigned int cifs_max_pending = CIFS_MAX_REQ; |
60654ce0 | 117 | module_param(cifs_max_pending, uint, 0444); |
11911b95 SF |
118 | MODULE_PARM_DESC(cifs_max_pending, "Simultaneous requests to server for " |
119 | "CIFS/SMB1 dialect (N/A for SMB3) " | |
10b9b98e | 120 | "Default: 32767 Range: 2 to 32767."); |
238b351d SF |
121 | unsigned int dir_cache_timeout = 30; |
122 | module_param(dir_cache_timeout, uint, 0644); | |
123 | MODULE_PARM_DESC(dir_cache_timeout, "Number of seconds to cache directory contents for which we have a lease. Default: 30 " | |
124 | "Range: 1 to 65000 seconds, 0 to disable caching dir contents"); | |
00778e22 SF |
125 | #ifdef CONFIG_CIFS_STATS2 |
126 | unsigned int slow_rsp_threshold = 1; | |
127 | module_param(slow_rsp_threshold, uint, 0644); | |
128 | MODULE_PARM_DESC(slow_rsp_threshold, "Amount of time (in seconds) to wait " | |
129 | "before logging that a response is delayed. " | |
130 | "Default: 1 (if set to 0 disables msg)."); | |
131 | #endif /* STATS2 */ | |
132 | ||
e7504734 | 133 | module_param(enable_oplocks, bool, 0644); |
60654ce0 | 134 | MODULE_PARM_DESC(enable_oplocks, "Enable or disable oplocks. Default: y/Y/1"); |
e7504734 | 135 | |
29e27923 SF |
136 | module_param(enable_gcm_256, bool, 0644); |
137 | MODULE_PARM_DESC(enable_gcm_256, "Enable requesting strongest (256 bit) GCM encryption. Default: n/N/0"); | |
138 | ||
fbfd0b46 SF |
139 | module_param(require_gcm_256, bool, 0644); |
140 | MODULE_PARM_DESC(require_gcm_256, "Require strongest (256 bit) GCM encryption. Default: n/N/0"); | |
141 | ||
53d31a3f SF |
142 | module_param(enable_negotiate_signing, bool, 0644); |
143 | MODULE_PARM_DESC(enable_negotiate_signing, "Enable negotiating packet signing algorithm with server. Default: n/N/0"); | |
144 | ||
f92a720e SF |
145 | module_param(disable_legacy_dialects, bool, 0644); |
146 | MODULE_PARM_DESC(disable_legacy_dialects, "To improve security it may be " | |
147 | "helpful to restrict the ability to " | |
148 | "override the default dialects (SMB2.1, " | |
149 | "SMB3 and SMB3.02) on mount with old " | |
150 | "dialects (CIFS/SMB1 and SMB2) since " | |
151 | "vers=1.0 (CIFS/SMB1) and vers=2.0 are weaker" | |
152 | " and less secure. Default: n/N/0"); | |
153 | ||
1da177e4 LT |
154 | extern mempool_t *cifs_sm_req_poolp; |
155 | extern mempool_t *cifs_req_poolp; | |
156 | extern mempool_t *cifs_mid_poolp; | |
157 | ||
da472fc8 | 158 | struct workqueue_struct *cifsiod_wq; |
35cf94a3 | 159 | struct workqueue_struct *decrypt_wq; |
32546a95 | 160 | struct workqueue_struct *fileinfo_put_wq; |
3998e6b8 | 161 | struct workqueue_struct *cifsoplockd_wq; |
860b69a9 | 162 | struct workqueue_struct *deferredclose_wq; |
3d22462a | 163 | __u32 cifs_lock_secret; |
da472fc8 | 164 | |
24261fc2 MG |
165 | /* |
166 | * Bumps refcount for cifs super block. | |
167 | * Note that it should be only called if a referece to VFS super block is | |
168 | * already held, e.g. in open-type syscalls context. Otherwise it can race with | |
169 | * atomic_dec_and_test in deactivate_locked_super. | |
170 | */ | |
171 | void | |
172 | cifs_sb_active(struct super_block *sb) | |
173 | { | |
174 | struct cifs_sb_info *server = CIFS_SB(sb); | |
175 | ||
176 | if (atomic_inc_return(&server->active) == 1) | |
177 | atomic_inc(&sb->s_active); | |
178 | } | |
179 | ||
180 | void | |
181 | cifs_sb_deactive(struct super_block *sb) | |
182 | { | |
183 | struct cifs_sb_info *server = CIFS_SB(sb); | |
184 | ||
185 | if (atomic_dec_and_test(&server->active)) | |
186 | deactivate_super(sb); | |
187 | } | |
188 | ||
1da177e4 | 189 | static int |
97d1152a | 190 | cifs_read_super(struct super_block *sb) |
1da177e4 LT |
191 | { |
192 | struct inode *inode; | |
b2e5cd33 | 193 | struct cifs_sb_info *cifs_sb; |
2f6c9479 | 194 | struct cifs_tcon *tcon; |
cb7a69e6 | 195 | struct timespec64 ts; |
1da177e4 | 196 | int rc = 0; |
50c2f753 | 197 | |
b2e5cd33 | 198 | cifs_sb = CIFS_SB(sb); |
2f6c9479 | 199 | tcon = cifs_sb_master_tcon(cifs_sb); |
1da177e4 | 200 | |
2c6292ae | 201 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIXACL) |
1751e8a6 | 202 | sb->s_flags |= SB_POSIXACL; |
2c6292ae | 203 | |
8a69e96e SF |
204 | if (tcon->snapshot_time) |
205 | sb->s_flags |= SB_RDONLY; | |
206 | ||
2f6c9479 | 207 | if (tcon->ses->capabilities & tcon->ses->server->vals->cap_large_files) |
2c6292ae AV |
208 | sb->s_maxbytes = MAX_LFS_FILESIZE; |
209 | else | |
210 | sb->s_maxbytes = MAX_NON_LFS; | |
211 | ||
553292a6 SF |
212 | /* |
213 | * Some very old servers like DOS and OS/2 used 2 second granularity | |
214 | * (while all current servers use 100ns granularity - see MS-DTYP) | |
215 | * but 1 second is the maximum allowed granularity for the VFS | |
216 | * so for old servers set time granularity to 1 second while for | |
217 | * everything else (current servers) set it to 100ns. | |
218 | */ | |
d4cfbf04 SF |
219 | if ((tcon->ses->server->vals->protocol_id == SMB10_PROT_ID) && |
220 | ((tcon->ses->capabilities & | |
221 | tcon->ses->server->vals->cap_nt_find) == 0) && | |
222 | !tcon->unix_ext) { | |
223 | sb->s_time_gran = 1000000000; /* 1 second is max allowed gran */ | |
224 | ts = cnvrtDosUnixTm(cpu_to_le16(SMB_DATE_MIN), 0, 0); | |
cb7a69e6 | 225 | sb->s_time_min = ts.tv_sec; |
d4cfbf04 SF |
226 | ts = cnvrtDosUnixTm(cpu_to_le16(SMB_DATE_MAX), |
227 | cpu_to_le16(SMB_TIME_MAX), 0); | |
cb7a69e6 DD |
228 | sb->s_time_max = ts.tv_sec; |
229 | } else { | |
d4cfbf04 SF |
230 | /* |
231 | * Almost every server, including all SMB2+, uses DCE TIME | |
232 | * ie 100 nanosecond units, since 1601. See MS-DTYP and MS-FSCC | |
233 | */ | |
234 | sb->s_time_gran = 100; | |
235 | ts = cifs_NTtimeToUnix(0); | |
cb7a69e6 | 236 | sb->s_time_min = ts.tv_sec; |
d4cfbf04 | 237 | ts = cifs_NTtimeToUnix(cpu_to_le64(S64_MAX)); |
cb7a69e6 DD |
238 | sb->s_time_max = ts.tv_sec; |
239 | } | |
240 | ||
dea29037 | 241 | sb->s_magic = CIFS_SUPER_MAGIC; |
1da177e4 | 242 | sb->s_op = &cifs_super_ops; |
a9ae008f | 243 | sb->s_xattr = cifs_xattr_handlers; |
851ea086 JK |
244 | rc = super_setup_bdi(sb); |
245 | if (rc) | |
246 | goto out_no_root; | |
b8d64f8c | 247 | /* tune readahead according to rsize if readahead size not set on mount */ |
06a46656 RS |
248 | if (cifs_sb->ctx->rsize == 0) |
249 | cifs_sb->ctx->rsize = | |
250 | tcon->ses->server->ops->negotiate_rsize(tcon, cifs_sb->ctx); | |
b8d64f8c SF |
251 | if (cifs_sb->ctx->rasize) |
252 | sb->s_bdi->ra_pages = cifs_sb->ctx->rasize / PAGE_SIZE; | |
253 | else | |
ba8c2b75 | 254 | sb->s_bdi->ra_pages = 2 * (cifs_sb->ctx->rsize / PAGE_SIZE); |
851ea086 | 255 | |
1da177e4 LT |
256 | sb->s_blocksize = CIFS_MAX_MSGSIZE; |
257 | sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */ | |
9b6763e0 | 258 | inode = cifs_root_iget(sb); |
1da177e4 | 259 | |
ce634ab2 DH |
260 | if (IS_ERR(inode)) { |
261 | rc = PTR_ERR(inode); | |
1da177e4 LT |
262 | goto out_no_root; |
263 | } | |
264 | ||
2f6c9479 | 265 | if (tcon->nocase) |
66ffd113 JL |
266 | sb->s_d_op = &cifs_ci_dentry_ops; |
267 | else | |
268 | sb->s_d_op = &cifs_dentry_ops; | |
269 | ||
48fde701 | 270 | sb->s_root = d_make_root(inode); |
1da177e4 LT |
271 | if (!sb->s_root) { |
272 | rc = -ENOMEM; | |
273 | goto out_no_root; | |
274 | } | |
50c2f753 | 275 | |
f3a6a60e | 276 | #ifdef CONFIG_CIFS_NFSD_EXPORT |
7521a3c5 | 277 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) { |
f96637be | 278 | cifs_dbg(FYI, "export ops supported\n"); |
7521a3c5 SF |
279 | sb->s_export_op = &cifs_export_ops; |
280 | } | |
f3a6a60e | 281 | #endif /* CONFIG_CIFS_NFSD_EXPORT */ |
1da177e4 LT |
282 | |
283 | return 0; | |
284 | ||
285 | out_no_root: | |
f96637be | 286 | cifs_dbg(VFS, "%s: get root inode failed\n", __func__); |
1da177e4 LT |
287 | return rc; |
288 | } | |
289 | ||
6d686175 AV |
290 | static void cifs_kill_sb(struct super_block *sb) |
291 | { | |
292 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
269f67e1 | 293 | |
5e9c89d4 RS |
294 | /* |
295 | * We ned to release all dentries for the cached directories | |
296 | * before we kill the sb. | |
297 | */ | |
269f67e1 | 298 | if (cifs_sb->root) { |
05b98fd2 | 299 | close_all_cached_dirs(cifs_sb); |
d788e516 SP |
300 | |
301 | /* finally release root dentry */ | |
269f67e1 RS |
302 | dput(cifs_sb->root); |
303 | cifs_sb->root = NULL; | |
304 | } | |
305 | ||
6d686175 | 306 | kill_anon_super(sb); |
98ab494d | 307 | cifs_umount(cifs_sb); |
1da177e4 LT |
308 | } |
309 | ||
310 | static int | |
726c3342 | 311 | cifs_statfs(struct dentry *dentry, struct kstatfs *buf) |
1da177e4 | 312 | { |
726c3342 | 313 | struct super_block *sb = dentry->d_sb; |
39da9847 | 314 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
96daf2b0 | 315 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
76ec5e33 | 316 | struct TCP_Server_Info *server = tcon->ses->server; |
6d5786a3 | 317 | unsigned int xid; |
76ec5e33 | 318 | int rc = 0; |
1da177e4 | 319 | |
6d5786a3 | 320 | xid = get_xid(); |
1da177e4 | 321 | |
21ba3845 SF |
322 | if (le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength) > 0) |
323 | buf->f_namelen = | |
324 | le32_to_cpu(tcon->fsAttrInfo.MaxPathNameComponentLength); | |
325 | else | |
326 | buf->f_namelen = PATH_MAX; | |
327 | ||
328 | buf->f_fsid.val[0] = tcon->vol_serial_number; | |
329 | /* are using part of create time for more randomness, see man statfs */ | |
330 | buf->f_fsid.val[1] = (int)le64_to_cpu(tcon->vol_create_time); | |
331 | ||
1da177e4 LT |
332 | buf->f_files = 0; /* undefined */ |
333 | buf->f_ffree = 0; /* unlimited */ | |
334 | ||
76ec5e33 | 335 | if (server->ops->queryfs) |
0f060936 | 336 | rc = server->ops->queryfs(xid, tcon, cifs_sb, buf); |
39da9847 | 337 | |
6d5786a3 | 338 | free_xid(xid); |
14302ee3 | 339 | return rc; |
1da177e4 LT |
340 | } |
341 | ||
31742c5a SF |
342 | static long cifs_fallocate(struct file *file, int mode, loff_t off, loff_t len) |
343 | { | |
7119e220 | 344 | struct cifs_sb_info *cifs_sb = CIFS_FILE_SB(file); |
31742c5a SF |
345 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
346 | struct TCP_Server_Info *server = tcon->ses->server; | |
347 | ||
348 | if (server->ops->fallocate) | |
349 | return server->ops->fallocate(file, tcon, mode, off, len); | |
350 | ||
351 | return -EOPNOTSUPP; | |
352 | } | |
353 | ||
4609e1f1 | 354 | static int cifs_permission(struct mnt_idmap *idmap, |
549c7297 | 355 | struct inode *inode, int mask) |
1da177e4 LT |
356 | { |
357 | struct cifs_sb_info *cifs_sb; | |
358 | ||
359 | cifs_sb = CIFS_SB(inode->i_sb); | |
360 | ||
f696a365 MS |
361 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) { |
362 | if ((mask & MAY_EXEC) && !execute_ok(inode)) | |
363 | return -EACCES; | |
364 | else | |
365 | return 0; | |
366 | } else /* file mode might have been restricted at mount time | |
50c2f753 | 367 | on the client (above and beyond ACL on servers) for |
1da177e4 | 368 | servers which do not support setting and viewing mode bits, |
50c2f753 | 369 | so allowing client to check permissions is useful */ |
4609e1f1 | 370 | return generic_permission(&nop_mnt_idmap, inode, mask); |
1da177e4 LT |
371 | } |
372 | ||
e18b890b CL |
373 | static struct kmem_cache *cifs_inode_cachep; |
374 | static struct kmem_cache *cifs_req_cachep; | |
375 | static struct kmem_cache *cifs_mid_cachep; | |
e18b890b | 376 | static struct kmem_cache *cifs_sm_req_cachep; |
1da177e4 LT |
377 | mempool_t *cifs_sm_req_poolp; |
378 | mempool_t *cifs_req_poolp; | |
379 | mempool_t *cifs_mid_poolp; | |
380 | ||
381 | static struct inode * | |
382 | cifs_alloc_inode(struct super_block *sb) | |
383 | { | |
384 | struct cifsInodeInfo *cifs_inode; | |
fd60b288 | 385 | cifs_inode = alloc_inode_sb(sb, cifs_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
386 | if (!cifs_inode) |
387 | return NULL; | |
388 | cifs_inode->cifsAttrs = 0x20; /* default */ | |
1da177e4 | 389 | cifs_inode->time = 0; |
b8c32dbb PS |
390 | /* |
391 | * Until the file is open and we have gotten oplock info back from the | |
392 | * server, can not assume caching of file data or metadata. | |
393 | */ | |
c6723628 | 394 | cifs_set_oplock_level(cifs_inode, 0); |
aff8d5ca | 395 | cifs_inode->flags = 0; |
c11f1df5 SP |
396 | spin_lock_init(&cifs_inode->writers_lock); |
397 | cifs_inode->writers = 0; | |
874c8ca1 | 398 | cifs_inode->netfs.inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */ |
966cc171 | 399 | cifs_inode->netfs.remote_i_size = 0; |
20054bd6 JL |
400 | cifs_inode->uniqueid = 0; |
401 | cifs_inode->createtime = 0; | |
42873b0a | 402 | cifs_inode->epoch = 0; |
487317c9 | 403 | spin_lock_init(&cifs_inode->open_file_lock); |
fa70b87c | 404 | generate_random_uuid(cifs_inode->lease_key); |
76894f3e | 405 | cifs_inode->symlink_target = NULL; |
2a38e120 | 406 | |
b8c32dbb PS |
407 | /* |
408 | * Can not set i_flags here - they get immediately overwritten to zero | |
409 | * by the VFS. | |
410 | */ | |
874c8ca1 | 411 | /* cifs_inode->netfs.inode.i_flags = S_NOATIME | S_NOCMTIME; */ |
1da177e4 | 412 | INIT_LIST_HEAD(&cifs_inode->openFileList); |
f45d3416 | 413 | INIT_LIST_HEAD(&cifs_inode->llist); |
c3f207ab RS |
414 | INIT_LIST_HEAD(&cifs_inode->deferred_closes); |
415 | spin_lock_init(&cifs_inode->deferred_lock); | |
874c8ca1 | 416 | return &cifs_inode->netfs.inode; |
1da177e4 LT |
417 | } |
418 | ||
419 | static void | |
c2e6802e | 420 | cifs_free_inode(struct inode *inode) |
1da177e4 | 421 | { |
76894f3e PA |
422 | struct cifsInodeInfo *cinode = CIFS_I(inode); |
423 | ||
424 | if (S_ISLNK(inode->i_mode)) | |
425 | kfree(cinode->symlink_target); | |
426 | kmem_cache_free(cifs_inode_cachep, cinode); | |
1da177e4 LT |
427 | } |
428 | ||
9451a9a5 | 429 | static void |
b57922d9 | 430 | cifs_evict_inode(struct inode *inode) |
9451a9a5 | 431 | { |
91b0abe3 | 432 | truncate_inode_pages_final(&inode->i_data); |
c9c4ff12 | 433 | if (inode->i_state & I_PINNING_NETFS_WB) |
70431bfd DH |
434 | cifs_fscache_unuse_inode_cookie(inode, true); |
435 | cifs_fscache_release_inode_cookie(inode); | |
dbd5768f | 436 | clear_inode(inode); |
9451a9a5 SJ |
437 | } |
438 | ||
61f98ffd JL |
439 | static void |
440 | cifs_show_address(struct seq_file *s, struct TCP_Server_Info *server) | |
441 | { | |
a9f1b85e PS |
442 | struct sockaddr_in *sa = (struct sockaddr_in *) &server->dstaddr; |
443 | struct sockaddr_in6 *sa6 = (struct sockaddr_in6 *) &server->dstaddr; | |
444 | ||
571d5972 | 445 | seq_puts(s, ",addr="); |
61f98ffd | 446 | |
a9f1b85e | 447 | switch (server->dstaddr.ss_family) { |
61f98ffd | 448 | case AF_INET: |
a9f1b85e | 449 | seq_printf(s, "%pI4", &sa->sin_addr.s_addr); |
61f98ffd JL |
450 | break; |
451 | case AF_INET6: | |
a9f1b85e PS |
452 | seq_printf(s, "%pI6", &sa6->sin6_addr.s6_addr); |
453 | if (sa6->sin6_scope_id) | |
454 | seq_printf(s, "%%%u", sa6->sin6_scope_id); | |
61f98ffd JL |
455 | break; |
456 | default: | |
571d5972 | 457 | seq_puts(s, "(unknown)"); |
61f98ffd | 458 | } |
8339dd32 LL |
459 | if (server->rdma) |
460 | seq_puts(s, ",rdma"); | |
61f98ffd JL |
461 | } |
462 | ||
3e715513 | 463 | static void |
28e11bd8 | 464 | cifs_show_security(struct seq_file *s, struct cifs_ses *ses) |
3e715513 | 465 | { |
eda2116f SF |
466 | if (ses->sectype == Unspecified) { |
467 | if (ses->user_name == NULL) | |
468 | seq_puts(s, ",sec=none"); | |
28e11bd8 | 469 | return; |
eda2116f | 470 | } |
28e11bd8 | 471 | |
571d5972 | 472 | seq_puts(s, ",sec="); |
3e715513 | 473 | |
28e11bd8 | 474 | switch (ses->sectype) { |
3e715513 | 475 | case NTLMv2: |
571d5972 | 476 | seq_puts(s, "ntlmv2"); |
3e715513 | 477 | break; |
3e715513 | 478 | case Kerberos: |
3f6166aa | 479 | seq_puts(s, "krb5"); |
3e715513 JL |
480 | break; |
481 | case RawNTLMSSP: | |
571d5972 | 482 | seq_puts(s, "ntlmssp"); |
3e715513 JL |
483 | break; |
484 | default: | |
485 | /* shouldn't ever happen */ | |
571d5972 | 486 | seq_puts(s, "unknown"); |
3e715513 JL |
487 | break; |
488 | } | |
489 | ||
28e11bd8 | 490 | if (ses->sign) |
571d5972 | 491 | seq_puts(s, "i"); |
3f6166aa PP |
492 | |
493 | if (ses->sectype == Kerberos) | |
494 | seq_printf(s, ",cruid=%u", | |
495 | from_kuid_munged(&init_user_ns, ses->cred_uid)); | |
3e715513 JL |
496 | } |
497 | ||
d06b5056 JL |
498 | static void |
499 | cifs_show_cache_flavor(struct seq_file *s, struct cifs_sb_info *cifs_sb) | |
500 | { | |
571d5972 | 501 | seq_puts(s, ",cache="); |
d06b5056 JL |
502 | |
503 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_STRICT_IO) | |
571d5972 | 504 | seq_puts(s, "strict"); |
d06b5056 | 505 | else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DIRECT_IO) |
571d5972 | 506 | seq_puts(s, "none"); |
41e033fe SF |
507 | else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RW_CACHE) |
508 | seq_puts(s, "singleclient"); /* assume only one client access */ | |
83bbfa70 SF |
509 | else if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RO_CACHE) |
510 | seq_puts(s, "ro"); /* read only caching assumed */ | |
d06b5056 | 511 | else |
571d5972 | 512 | seq_puts(s, "loose"); |
d06b5056 JL |
513 | } |
514 | ||
653a5efb SF |
515 | /* |
516 | * cifs_show_devname() is used so we show the mount device name with correct | |
517 | * format (e.g. forward slashes vs. back slashes) in /proc/mounts | |
518 | */ | |
519 | static int cifs_show_devname(struct seq_file *m, struct dentry *root) | |
520 | { | |
521 | struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb); | |
af1a3d2b | 522 | char *devname = kstrdup(cifs_sb->ctx->source, GFP_KERNEL); |
653a5efb SF |
523 | |
524 | if (devname == NULL) | |
525 | seq_puts(m, "none"); | |
526 | else { | |
527 | convert_delimiter(devname, '/'); | |
0fc9322a MB |
528 | /* escape all spaces in share names */ |
529 | seq_escape(m, devname, " \t"); | |
653a5efb SF |
530 | kfree(devname); |
531 | } | |
532 | return 0; | |
533 | } | |
534 | ||
1da177e4 LT |
535 | /* |
536 | * cifs_show_options() is for displaying mount options in /proc/mounts. | |
537 | * Not all settable options are displayed but most of the important | |
538 | * ones are. | |
539 | */ | |
540 | static int | |
34c80b1d | 541 | cifs_show_options(struct seq_file *s, struct dentry *root) |
1da177e4 | 542 | { |
34c80b1d | 543 | struct cifs_sb_info *cifs_sb = CIFS_SB(root->d_sb); |
96daf2b0 | 544 | struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb); |
3eb9a889 BG |
545 | struct sockaddr *srcaddr; |
546 | srcaddr = (struct sockaddr *)&tcon->ses->server->srcaddr; | |
8616e0fc | 547 | |
a068acf2 | 548 | seq_show_option(s, "vers", tcon->ses->server->vals->version_string); |
28e11bd8 | 549 | cifs_show_security(s, tcon->ses); |
d06b5056 | 550 | cifs_show_cache_flavor(s, cifs_sb); |
3e715513 | 551 | |
3e7a02d4 SF |
552 | if (tcon->no_lease) |
553 | seq_puts(s, ",nolease"); | |
9ccecae8 | 554 | if (cifs_sb->ctx->multiuser) |
571d5972 | 555 | seq_puts(s, ",multiuser"); |
8727c8a8 | 556 | else if (tcon->ses->user_name) |
a068acf2 | 557 | seq_show_option(s, "username", tcon->ses->user_name); |
29e07c82 | 558 | |
e55954a5 | 559 | if (tcon->ses->domainName && tcon->ses->domainName[0] != 0) |
a068acf2 | 560 | seq_show_option(s, "domain", tcon->ses->domainName); |
8616e0fc | 561 | |
3eb9a889 BG |
562 | if (srcaddr->sa_family != AF_UNSPEC) { |
563 | struct sockaddr_in *saddr4; | |
564 | struct sockaddr_in6 *saddr6; | |
565 | saddr4 = (struct sockaddr_in *)srcaddr; | |
566 | saddr6 = (struct sockaddr_in6 *)srcaddr; | |
567 | if (srcaddr->sa_family == AF_INET6) | |
568 | seq_printf(s, ",srcaddr=%pI6c", | |
569 | &saddr6->sin6_addr); | |
570 | else if (srcaddr->sa_family == AF_INET) | |
571 | seq_printf(s, ",srcaddr=%pI4", | |
572 | &saddr4->sin_addr.s_addr); | |
573 | else | |
574 | seq_printf(s, ",srcaddr=BAD-AF:%i", | |
575 | (int)(srcaddr->sa_family)); | |
576 | } | |
577 | ||
1f68233c | 578 | seq_printf(s, ",uid=%u", |
8401e936 | 579 | from_kuid_munged(&init_user_ns, cifs_sb->ctx->linux_uid)); |
340481a3 | 580 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_UID) |
571d5972 | 581 | seq_puts(s, ",forceuid"); |
4486d6ed | 582 | else |
571d5972 | 583 | seq_puts(s, ",noforceuid"); |
340481a3 | 584 | |
1f68233c | 585 | seq_printf(s, ",gid=%u", |
8401e936 | 586 | from_kgid_munged(&init_user_ns, cifs_sb->ctx->linux_gid)); |
340481a3 | 587 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_OVERR_GID) |
571d5972 | 588 | seq_puts(s, ",forcegid"); |
4486d6ed | 589 | else |
571d5972 | 590 | seq_puts(s, ",noforcegid"); |
8616e0fc | 591 | |
61f98ffd | 592 | cifs_show_address(s, tcon->ses->server); |
1da177e4 | 593 | |
8616e0fc | 594 | if (!tcon->unix_ext) |
5206efd6 | 595 | seq_printf(s, ",file_mode=0%ho,dir_mode=0%ho", |
8401e936 RS |
596 | cifs_sb->ctx->file_mode, |
597 | cifs_sb->ctx->dir_mode); | |
7c7ee628 RS |
598 | if (cifs_sb->ctx->iocharset) |
599 | seq_printf(s, ",iocharset=%s", cifs_sb->ctx->iocharset); | |
8616e0fc | 600 | if (tcon->seal) |
571d5972 | 601 | seq_puts(s, ",seal"); |
ec57010a SF |
602 | else if (tcon->ses->server->ignore_signature) |
603 | seq_puts(s, ",signloosely"); | |
8616e0fc | 604 | if (tcon->nocase) |
571d5972 | 605 | seq_puts(s, ",nocase"); |
82e9367c SF |
606 | if (tcon->nodelete) |
607 | seq_puts(s, ",nodelete"); | |
52832252 SF |
608 | if (cifs_sb->ctx->no_sparse) |
609 | seq_puts(s, ",nosparse"); | |
c8b6ac1a K |
610 | if (tcon->local_lease) |
611 | seq_puts(s, ",locallease"); | |
8616e0fc | 612 | if (tcon->retry) |
571d5972 | 613 | seq_puts(s, ",hard"); |
6e82e929 RS |
614 | else |
615 | seq_puts(s, ",soft"); | |
f16dfa7c SF |
616 | if (tcon->use_persistent) |
617 | seq_puts(s, ",persistenthandles"); | |
592fafe6 SF |
618 | else if (tcon->use_resilient) |
619 | seq_puts(s, ",resilienthandles"); | |
b326614e SF |
620 | if (tcon->posix_extensions) |
621 | seq_puts(s, ",posix"); | |
622 | else if (tcon->unix_ext) | |
623 | seq_puts(s, ",unix"); | |
624 | else | |
625 | seq_puts(s, ",nounix"); | |
8393072b AA |
626 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS) |
627 | seq_puts(s, ",nodfs"); | |
8616e0fc | 628 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) |
571d5972 | 629 | seq_puts(s, ",posixpaths"); |
8616e0fc | 630 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) |
571d5972 | 631 | seq_puts(s, ",setuids"); |
95932655 SF |
632 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UID_FROM_ACL) |
633 | seq_puts(s, ",idsfromsid"); | |
8616e0fc | 634 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) |
571d5972 | 635 | seq_puts(s, ",serverino"); |
d4ffff1f | 636 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD) |
571d5972 | 637 | seq_puts(s, ",rwpidforward"); |
d4ffff1f | 638 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOPOSIXBRL) |
571d5972 | 639 | seq_puts(s, ",forcemand"); |
8616e0fc | 640 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_XATTR) |
571d5972 | 641 | seq_puts(s, ",nouser_xattr"); |
8616e0fc | 642 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR) |
571d5972 | 643 | seq_puts(s, ",mapchars"); |
bc8ebdc4 NA |
644 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SFM_CHR) |
645 | seq_puts(s, ",mapposix"); | |
8616e0fc | 646 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL) |
571d5972 | 647 | seq_puts(s, ",sfu"); |
8616e0fc | 648 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_BRL) |
571d5972 | 649 | seq_puts(s, ",nobrl"); |
3d4ef9a1 SF |
650 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_HANDLE_CACHE) |
651 | seq_puts(s, ",nohandlecache"); | |
412094a8 SF |
652 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MODE_FROM_SID) |
653 | seq_puts(s, ",modefromsid"); | |
8616e0fc | 654 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_ACL) |
571d5972 | 655 | seq_puts(s, ",cifsacl"); |
8616e0fc | 656 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_DYNPERM) |
571d5972 | 657 | seq_puts(s, ",dynperm"); |
1751e8a6 | 658 | if (root->d_sb->s_flags & SB_POSIXACL) |
571d5972 | 659 | seq_puts(s, ",acl"); |
736a3320 | 660 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MF_SYMLINKS) |
571d5972 | 661 | seq_puts(s, ",mfsymlinks"); |
476428f8 | 662 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_FSCACHE) |
571d5972 | 663 | seq_puts(s, ",fsc"); |
71c424ba | 664 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NOSSYNC) |
571d5972 | 665 | seq_puts(s, ",nostrictsync"); |
71c424ba | 666 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) |
571d5972 | 667 | seq_puts(s, ",noperm"); |
3c7c87fd | 668 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPUID) |
1f68233c EB |
669 | seq_printf(s, ",backupuid=%u", |
670 | from_kuid_munged(&init_user_ns, | |
8401e936 | 671 | cifs_sb->ctx->backupuid)); |
3c7c87fd | 672 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_CIFS_BACKUPGID) |
1f68233c EB |
673 | seq_printf(s, ",backupgid=%u", |
674 | from_kgid_munged(&init_user_ns, | |
8401e936 | 675 | cifs_sb->ctx->backupgid)); |
8616e0fc | 676 | |
0c2b5f7c SF |
677 | seq_printf(s, ",rsize=%u", cifs_sb->ctx->rsize); |
678 | seq_printf(s, ",wsize=%u", cifs_sb->ctx->wsize); | |
679 | seq_printf(s, ",bsize=%u", cifs_sb->ctx->bsize); | |
b8d64f8c SF |
680 | if (cifs_sb->ctx->rasize) |
681 | seq_printf(s, ",rasize=%u", cifs_sb->ctx->rasize); | |
563317ec SF |
682 | if (tcon->ses->server->min_offload) |
683 | seq_printf(s, ",esize=%u", tcon->ses->server->min_offload); | |
ce09f8d8 SP |
684 | if (tcon->ses->server->retrans) |
685 | seq_printf(s, ",retrans=%u", tcon->ses->server->retrans); | |
adfeb3e0 SF |
686 | seq_printf(s, ",echo_interval=%lu", |
687 | tcon->ses->server->echo_interval / HZ); | |
dc179268 | 688 | |
2bfd8104 | 689 | /* Only display the following if overridden on mount */ |
dc179268 SF |
690 | if (tcon->ses->server->max_credits != SMB2_MAX_CREDITS_AVAILABLE) |
691 | seq_printf(s, ",max_credits=%u", tcon->ses->server->max_credits); | |
2bfd8104 SF |
692 | if (tcon->ses->server->tcp_nodelay) |
693 | seq_puts(s, ",tcpnodelay"); | |
694 | if (tcon->ses->server->noautotune) | |
695 | seq_puts(s, ",noautotune"); | |
696 | if (tcon->ses->server->noblocksnd) | |
697 | seq_puts(s, ",noblocksend"); | |
dc765027 SP |
698 | if (tcon->ses->server->nosharesock) |
699 | seq_puts(s, ",nosharesock"); | |
dc179268 | 700 | |
8a69e96e SF |
701 | if (tcon->snapshot_time) |
702 | seq_printf(s, ",snapshot=%llu", tcon->snapshot_time); | |
ca567eb2 SF |
703 | if (tcon->handle_timeout) |
704 | seq_printf(s, ",handletimeout=%u", tcon->handle_timeout); | |
6a50d71d SF |
705 | if (tcon->max_cached_dirs != MAX_CACHED_FIDS) |
706 | seq_printf(s, ",max_cached_dirs=%u", tcon->max_cached_dirs); | |
57804646 SF |
707 | |
708 | /* | |
709 | * Display file and directory attribute timeout in seconds. | |
710 | * If file and directory attribute timeout the same then actimeo | |
711 | * was likely specified on mount | |
712 | */ | |
713 | if (cifs_sb->ctx->acdirmax == cifs_sb->ctx->acregmax) | |
714 | seq_printf(s, ",actimeo=%lu", cifs_sb->ctx->acregmax / HZ); | |
715 | else { | |
716 | seq_printf(s, ",acdirmax=%lu", cifs_sb->ctx->acdirmax / HZ); | |
717 | seq_printf(s, ",acregmax=%lu", cifs_sb->ctx->acregmax / HZ); | |
718 | } | |
5efdd912 | 719 | seq_printf(s, ",closetimeo=%lu", cifs_sb->ctx->closetimeo / HZ); |
8616e0fc | 720 | |
bcc88801 | 721 | if (tcon->ses->chan_max > 1) |
7866c177 | 722 | seq_printf(s, ",multichannel,max_channels=%zu", |
bcc88801 AA |
723 | tcon->ses->chan_max); |
724 | ||
0ac4e291 SC |
725 | if (tcon->use_witness) |
726 | seq_puts(s, ",witness"); | |
0ac4e291 | 727 | |
1da177e4 LT |
728 | return 0; |
729 | } | |
730 | ||
42faad99 | 731 | static void cifs_umount_begin(struct super_block *sb) |
68058e75 | 732 | { |
42faad99 | 733 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
96daf2b0 | 734 | struct cifs_tcon *tcon; |
68058e75 | 735 | |
4523cc30 | 736 | if (cifs_sb == NULL) |
9e2e85f8 SF |
737 | return; |
738 | ||
0d424ad0 | 739 | tcon = cifs_sb_master_tcon(cifs_sb); |
f1987b44 | 740 | |
3f9bcca7 | 741 | spin_lock(&cifs_tcp_ses_lock); |
d7d7a66a | 742 | spin_lock(&tcon->tc_lock); |
fdf59eb5 | 743 | if ((tcon->tc_count > 1) || (tcon->status == TID_EXITING)) { |
ad8034f1 | 744 | /* we have other mounts to same share or we have |
491eafce | 745 | already tried to umount this and woken up |
ad8034f1 | 746 | all waiting network requests, nothing to do */ |
d7d7a66a | 747 | spin_unlock(&tcon->tc_lock); |
3f9bcca7 | 748 | spin_unlock(&cifs_tcp_ses_lock); |
ad8034f1 | 749 | return; |
491eafce SF |
750 | } |
751 | /* | |
752 | * can not set tcon->status to TID_EXITING yet since we don't know if umount -f will | |
753 | * fail later (e.g. due to open files). TID_EXITING will be set just before tdis req sent | |
754 | */ | |
d7d7a66a | 755 | spin_unlock(&tcon->tc_lock); |
3f9bcca7 | 756 | spin_unlock(&cifs_tcp_ses_lock); |
5e1253b5 | 757 | |
2cb6f968 | 758 | cifs_close_all_deferred_files(tcon); |
3a5ff61c | 759 | /* cancel_brl_requests(tcon); */ /* BB mark all brl mids as exiting */ |
7b7abfe3 | 760 | /* cancel_notify_requests(tcon); */ |
50c2f753 | 761 | if (tcon->ses && tcon->ses->server) { |
f96637be | 762 | cifs_dbg(FYI, "wake up tasks now - umount begin not complete\n"); |
9e2e85f8 | 763 | wake_up_all(&tcon->ses->server->request_q); |
6ab16d24 SF |
764 | wake_up_all(&tcon->ses->server->response_q); |
765 | msleep(1); /* yield */ | |
766 | /* we have to kick the requests once more */ | |
767 | wake_up_all(&tcon->ses->server->response_q); | |
768 | msleep(1); | |
5e1253b5 | 769 | } |
68058e75 SF |
770 | |
771 | return; | |
772 | } | |
68058e75 | 773 | |
d39fc592 SF |
774 | static int cifs_freeze(struct super_block *sb) |
775 | { | |
776 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); | |
777 | struct cifs_tcon *tcon; | |
778 | ||
779 | if (cifs_sb == NULL) | |
780 | return 0; | |
781 | ||
782 | tcon = cifs_sb_master_tcon(cifs_sb); | |
783 | ||
784 | cifs_close_all_deferred_files(tcon); | |
785 | return 0; | |
786 | } | |
787 | ||
bf97d287 | 788 | #ifdef CONFIG_CIFS_STATS2 |
64132379 | 789 | static int cifs_show_stats(struct seq_file *s, struct dentry *root) |
bf97d287 SF |
790 | { |
791 | /* BB FIXME */ | |
792 | return 0; | |
793 | } | |
794 | #endif | |
795 | ||
70431bfd DH |
796 | static int cifs_write_inode(struct inode *inode, struct writeback_control *wbc) |
797 | { | |
c9c4ff12 | 798 | return netfs_unpin_writeback(inode, wbc); |
70431bfd DH |
799 | } |
800 | ||
45321ac5 | 801 | static int cifs_drop_inode(struct inode *inode) |
12420ac3 JL |
802 | { |
803 | struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb); | |
804 | ||
45321ac5 AV |
805 | /* no serverino => unconditional eviction */ |
806 | return !(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SERVER_INUM) || | |
807 | generic_drop_inode(inode); | |
12420ac3 JL |
808 | } |
809 | ||
ee9b6d61 | 810 | static const struct super_operations cifs_super_ops = { |
1da177e4 LT |
811 | .statfs = cifs_statfs, |
812 | .alloc_inode = cifs_alloc_inode, | |
70431bfd | 813 | .write_inode = cifs_write_inode, |
c2e6802e | 814 | .free_inode = cifs_free_inode, |
12420ac3 | 815 | .drop_inode = cifs_drop_inode, |
b57922d9 | 816 | .evict_inode = cifs_evict_inode, |
653a5efb SF |
817 | /* .show_path = cifs_show_path, */ /* Would we ever need show path? */ |
818 | .show_devname = cifs_show_devname, | |
12420ac3 JL |
819 | /* .delete_inode = cifs_delete_inode, */ /* Do not need above |
820 | function unless later we add lazy close of inodes or unless the | |
50c2f753 SF |
821 | kernel forgets to call us with the same number of releases (closes) |
822 | as opens */ | |
1da177e4 | 823 | .show_options = cifs_show_options, |
7b7abfe3 | 824 | .umount_begin = cifs_umount_begin, |
d39fc592 | 825 | .freeze_fs = cifs_freeze, |
bf97d287 | 826 | #ifdef CONFIG_CIFS_STATS2 |
f46d3e11 | 827 | .show_stats = cifs_show_stats, |
bf97d287 | 828 | #endif |
1da177e4 LT |
829 | }; |
830 | ||
f87d39d9 SF |
831 | /* |
832 | * Get root dentry from superblock according to prefix path mount option. | |
833 | * Return dentry with refcount + 1 on success and NULL otherwise. | |
834 | */ | |
835 | static struct dentry * | |
3fa1c6d1 | 836 | cifs_get_root(struct smb3_fs_context *ctx, struct super_block *sb) |
f87d39d9 | 837 | { |
fec11dd9 | 838 | struct dentry *dentry; |
f87d39d9 | 839 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
fec11dd9 AV |
840 | char *full_path = NULL; |
841 | char *s, *p; | |
f87d39d9 SF |
842 | char sep; |
843 | ||
348c1bfa SP |
844 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_USE_PREFIX_PATH) |
845 | return dget(sb->s_root); | |
846 | ||
3fa1c6d1 | 847 | full_path = cifs_build_path_to_root(ctx, cifs_sb, |
374402a2 | 848 | cifs_sb_master_tcon(cifs_sb), 0); |
f87d39d9 | 849 | if (full_path == NULL) |
9403c9c5 | 850 | return ERR_PTR(-ENOMEM); |
f87d39d9 | 851 | |
f96637be | 852 | cifs_dbg(FYI, "Get root dentry for %s\n", full_path); |
f87d39d9 | 853 | |
f87d39d9 | 854 | sep = CIFS_DIR_SEP(cifs_sb); |
fec11dd9 | 855 | dentry = dget(sb->s_root); |
0b66fa77 | 856 | s = full_path; |
fec11dd9 AV |
857 | |
858 | do { | |
2b0143b5 | 859 | struct inode *dir = d_inode(dentry); |
fec11dd9 AV |
860 | struct dentry *child; |
861 | ||
ce2ac521 JL |
862 | if (!S_ISDIR(dir->i_mode)) { |
863 | dput(dentry); | |
864 | dentry = ERR_PTR(-ENOTDIR); | |
865 | break; | |
866 | } | |
5b980b01 | 867 | |
fec11dd9 AV |
868 | /* skip separators */ |
869 | while (*s == sep) | |
870 | s++; | |
871 | if (!*s) | |
872 | break; | |
873 | p = s++; | |
874 | /* next separator */ | |
875 | while (*s && *s != sep) | |
876 | s++; | |
877 | ||
6c2d4798 | 878 | child = lookup_positive_unlocked(p, dentry, s - p); |
fec11dd9 AV |
879 | dput(dentry); |
880 | dentry = child; | |
881 | } while (!IS_ERR(dentry)); | |
f87d39d9 | 882 | kfree(full_path); |
fec11dd9 | 883 | return dentry; |
f87d39d9 SF |
884 | } |
885 | ||
ee01a14d AV |
886 | static int cifs_set_super(struct super_block *sb, void *data) |
887 | { | |
888 | struct cifs_mnt_data *mnt_data = data; | |
889 | sb->s_fs_info = mnt_data->cifs_sb; | |
890 | return set_anon_super(sb, NULL); | |
891 | } | |
892 | ||
24e0a1ef | 893 | struct dentry * |
c7c137b9 | 894 | cifs_smb3_do_mount(struct file_system_type *fs_type, |
24e0a1ef | 895 | int flags, struct smb3_fs_context *old_ctx) |
1da177e4 | 896 | { |
25c7f41e | 897 | struct cifs_mnt_data mnt_data; |
12c30f33 PA |
898 | struct cifs_sb_info *cifs_sb; |
899 | struct super_block *sb; | |
724d9f1c | 900 | struct dentry *root; |
12c30f33 | 901 | int rc; |
1da177e4 | 902 | |
1810769e PA |
903 | if (cifsFYI) { |
904 | cifs_dbg(FYI, "%s: devname=%s flags=0x%x\n", __func__, | |
905 | old_ctx->source, flags); | |
906 | } else { | |
907 | cifs_info("Attempting to mount %s\n", old_ctx->source); | |
908 | } | |
24e0a1ef | 909 | |
12c30f33 PA |
910 | cifs_sb = kzalloc(sizeof(*cifs_sb), GFP_KERNEL); |
911 | if (!cifs_sb) | |
912 | return ERR_PTR(-ENOMEM); | |
1da177e4 | 913 | |
d17abdf7 RS |
914 | cifs_sb->ctx = kzalloc(sizeof(struct smb3_fs_context), GFP_KERNEL); |
915 | if (!cifs_sb->ctx) { | |
916 | root = ERR_PTR(-ENOMEM); | |
917 | goto out; | |
918 | } | |
919 | rc = smb3_fs_context_dup(cifs_sb->ctx, old_ctx); | |
24e0a1ef RS |
920 | if (rc) { |
921 | root = ERR_PTR(rc); | |
922 | goto out; | |
923 | } | |
724d9f1c | 924 | |
51acd208 | 925 | rc = cifs_setup_cifs_sb(cifs_sb); |
4214ebf4 SP |
926 | if (rc) { |
927 | root = ERR_PTR(rc); | |
d17abdf7 | 928 | goto out; |
a6b5058f AA |
929 | } |
930 | ||
d17abdf7 | 931 | rc = cifs_mount(cifs_sb, cifs_sb->ctx); |
97d1152a | 932 | if (rc) { |
1751e8a6 | 933 | if (!(flags & SB_SILENT)) |
f96637be JP |
934 | cifs_dbg(VFS, "cifs_mount failed w/return code = %d\n", |
935 | rc); | |
97d1152a | 936 | root = ERR_PTR(rc); |
d17abdf7 | 937 | goto out; |
97d1152a AV |
938 | } |
939 | ||
d17abdf7 | 940 | mnt_data.ctx = cifs_sb->ctx; |
25c7f41e PS |
941 | mnt_data.cifs_sb = cifs_sb; |
942 | mnt_data.flags = flags; | |
943 | ||
9249e17f | 944 | /* BB should we make this contingent on mount parm? */ |
1751e8a6 | 945 | flags |= SB_NODIRATIME | SB_NOATIME; |
9249e17f DH |
946 | |
947 | sb = sget(fs_type, cifs_match_super, cifs_set_super, flags, &mnt_data); | |
724d9f1c | 948 | if (IS_ERR(sb)) { |
97d1152a | 949 | cifs_umount(cifs_sb); |
12c30f33 | 950 | return ERR_CAST(sb); |
724d9f1c | 951 | } |
1da177e4 | 952 | |
ee01a14d | 953 | if (sb->s_root) { |
f96637be | 954 | cifs_dbg(FYI, "Use existing superblock\n"); |
97d1152a | 955 | cifs_umount(cifs_sb); |
6cf5abbf | 956 | cifs_sb = NULL; |
5c4f1ad7 | 957 | } else { |
5c4f1ad7 AV |
958 | rc = cifs_read_super(sb); |
959 | if (rc) { | |
960 | root = ERR_PTR(rc); | |
961 | goto out_super; | |
962 | } | |
b2e5cd33 | 963 | |
1751e8a6 | 964 | sb->s_flags |= SB_ACTIVE; |
1da177e4 | 965 | } |
724d9f1c | 966 | |
6cf5abbf | 967 | root = cifs_get_root(cifs_sb ? cifs_sb->ctx : old_ctx, sb); |
9403c9c5 | 968 | if (IS_ERR(root)) |
f87d39d9 | 969 | goto out_super; |
25c7f41e | 970 | |
269f67e1 RS |
971 | if (cifs_sb) |
972 | cifs_sb->root = dget(root); | |
973 | ||
f96637be | 974 | cifs_dbg(FYI, "dentry root is: %p\n", root); |
d17abdf7 | 975 | return root; |
724d9f1c | 976 | |
641a58d6 | 977 | out_super: |
641a58d6 | 978 | deactivate_locked_super(sb); |
3d6cc989 | 979 | return root; |
641a58d6 | 980 | out: |
12c30f33 PA |
981 | kfree(cifs_sb->prepath); |
982 | smb3_cleanup_fs_context(cifs_sb->ctx); | |
983 | kfree(cifs_sb); | |
724d9f1c | 984 | return root; |
1da177e4 LT |
985 | } |
986 | ||
c7c137b9 | 987 | |
08bc0353 JL |
988 | static ssize_t |
989 | cifs_loose_read_iter(struct kiocb *iocb, struct iov_iter *iter) | |
990 | { | |
991 | ssize_t rc; | |
992 | struct inode *inode = file_inode(iocb->ki_filp); | |
993 | ||
994fd530 | 994 | if (iocb->ki_flags & IOCB_DIRECT) |
882137c4 RL |
995 | return cifs_user_readv(iocb, iter); |
996 | ||
08bc0353 JL |
997 | rc = cifs_revalidate_mapping(inode); |
998 | if (rc) | |
999 | return rc; | |
1000 | ||
1001 | return generic_file_read_iter(iocb, iter); | |
1002 | } | |
1003 | ||
3dae8750 | 1004 | static ssize_t cifs_file_write_iter(struct kiocb *iocb, struct iov_iter *from) |
1da177e4 | 1005 | { |
496ad9aa | 1006 | struct inode *inode = file_inode(iocb->ki_filp); |
c11f1df5 | 1007 | struct cifsInodeInfo *cinode = CIFS_I(inode); |
1da177e4 | 1008 | ssize_t written; |
72432ffc | 1009 | int rc; |
1da177e4 | 1010 | |
882137c4 RL |
1011 | if (iocb->ki_filp->f_flags & O_DIRECT) { |
1012 | written = cifs_user_writev(iocb, from); | |
1013 | if (written > 0 && CIFS_CACHE_READ(cinode)) { | |
1014 | cifs_zap_mapping(inode); | |
1015 | cifs_dbg(FYI, | |
1016 | "Set no oplock for inode=%p after a write operation\n", | |
1017 | inode); | |
1018 | cinode->oplock = 0; | |
1019 | } | |
1020 | return written; | |
1021 | } | |
1022 | ||
c11f1df5 SP |
1023 | written = cifs_get_writer(cinode); |
1024 | if (written) | |
1025 | return written; | |
1026 | ||
3dae8750 | 1027 | written = generic_file_write_iter(iocb, from); |
72432ffc | 1028 | |
18cceb6a | 1029 | if (CIFS_CACHE_WRITE(CIFS_I(inode))) |
c11f1df5 | 1030 | goto out; |
72432ffc PS |
1031 | |
1032 | rc = filemap_fdatawrite(inode->i_mapping); | |
1033 | if (rc) | |
3dae8750 | 1034 | cifs_dbg(FYI, "cifs_file_write_iter: %d rc on %p inode\n", |
f96637be | 1035 | rc, inode); |
72432ffc | 1036 | |
c11f1df5 SP |
1037 | out: |
1038 | cifs_put_writer(cinode); | |
1da177e4 LT |
1039 | return written; |
1040 | } | |
1041 | ||
965c8e59 | 1042 | static loff_t cifs_llseek(struct file *file, loff_t offset, int whence) |
c32a0b68 | 1043 | { |
dece44e3 RS |
1044 | struct cifsFileInfo *cfile = file->private_data; |
1045 | struct cifs_tcon *tcon; | |
1046 | ||
06222e49 | 1047 | /* |
965c8e59 | 1048 | * whence == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate |
06222e49 JB |
1049 | * the cached file length |
1050 | */ | |
965c8e59 | 1051 | if (whence != SEEK_SET && whence != SEEK_CUR) { |
6feb9891 | 1052 | int rc; |
496ad9aa | 1053 | struct inode *inode = file_inode(file); |
6feb9891 PS |
1054 | |
1055 | /* | |
1056 | * We need to be sure that all dirty pages are written and the | |
1057 | * server has the newest file length. | |
1058 | */ | |
18cceb6a | 1059 | if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping && |
6feb9891 PS |
1060 | inode->i_mapping->nrpages != 0) { |
1061 | rc = filemap_fdatawait(inode->i_mapping); | |
156ecb2d SF |
1062 | if (rc) { |
1063 | mapping_set_error(inode->i_mapping, rc); | |
1064 | return rc; | |
1065 | } | |
6feb9891 PS |
1066 | } |
1067 | /* | |
1068 | * Some applications poll for the file length in this strange | |
1069 | * way so we must seek to end on non-oplocked files by | |
1070 | * setting the revalidate time to zero. | |
1071 | */ | |
1072 | CIFS_I(inode)->time = 0; | |
1073 | ||
1074 | rc = cifs_revalidate_file_attr(file); | |
1075 | if (rc < 0) | |
1076 | return (loff_t)rc; | |
c32a0b68 | 1077 | } |
dece44e3 RS |
1078 | if (cfile && cfile->tlink) { |
1079 | tcon = tlink_tcon(cfile->tlink); | |
1080 | if (tcon->ses->server->ops->llseek) | |
1081 | return tcon->ses->server->ops->llseek(file, tcon, | |
1082 | offset, whence); | |
1083 | } | |
965c8e59 | 1084 | return generic_file_llseek(file, offset, whence); |
c32a0b68 SF |
1085 | } |
1086 | ||
e6f5c789 | 1087 | static int |
c69ff407 | 1088 | cifs_setlease(struct file *file, int arg, struct file_lease **lease, void **priv) |
84210e91 | 1089 | { |
18cceb6a PS |
1090 | /* |
1091 | * Note that this is called by vfs setlease with i_lock held to | |
1092 | * protect *lease from going away. | |
1093 | */ | |
496ad9aa | 1094 | struct inode *inode = file_inode(file); |
ba00ba64 | 1095 | struct cifsFileInfo *cfile = file->private_data; |
84210e91 | 1096 | |
02440806 JL |
1097 | /* Check if file is oplocked if this is request for new lease */ |
1098 | if (arg == F_UNLCK || | |
1099 | ((arg == F_RDLCK) && CIFS_CACHE_READ(CIFS_I(inode))) || | |
18cceb6a | 1100 | ((arg == F_WRLCK) && CIFS_CACHE_WRITE(CIFS_I(inode)))) |
e6f5c789 | 1101 | return generic_setlease(file, arg, lease, priv); |
13cfb733 | 1102 | else if (tlink_tcon(cfile->tlink)->local_lease && |
18cceb6a PS |
1103 | !CIFS_CACHE_READ(CIFS_I(inode))) |
1104 | /* | |
1105 | * If the server claims to support oplock on this file, then we | |
1106 | * still need to check oplock even if the local_lease mount | |
1107 | * option is set, but there are servers which do not support | |
1108 | * oplock for which this mount option may be useful if the user | |
1109 | * knows that the file won't be changed on the server by anyone | |
1110 | * else. | |
1111 | */ | |
e6f5c789 | 1112 | return generic_setlease(file, arg, lease, priv); |
51ee4b84 | 1113 | else |
84210e91 SF |
1114 | return -EAGAIN; |
1115 | } | |
84210e91 | 1116 | |
e6ab1582 | 1117 | struct file_system_type cifs_fs_type = { |
1da177e4 LT |
1118 | .owner = THIS_MODULE, |
1119 | .name = "cifs", | |
24e0a1ef RS |
1120 | .init_fs_context = smb3_init_fs_context, |
1121 | .parameters = smb3_fs_parameters, | |
6d686175 | 1122 | .kill_sb = cifs_kill_sb, |
c7e9f78f | 1123 | .fs_flags = FS_RENAME_DOES_D_MOVE, |
1da177e4 | 1124 | }; |
3e64fe5b | 1125 | MODULE_ALIAS_FS("cifs"); |
49218b4f | 1126 | |
c36ee7da | 1127 | struct file_system_type smb3_fs_type = { |
49218b4f SF |
1128 | .owner = THIS_MODULE, |
1129 | .name = "smb3", | |
24e0a1ef RS |
1130 | .init_fs_context = smb3_init_fs_context, |
1131 | .parameters = smb3_fs_parameters, | |
49218b4f | 1132 | .kill_sb = cifs_kill_sb, |
c7e9f78f | 1133 | .fs_flags = FS_RENAME_DOES_D_MOVE, |
49218b4f SF |
1134 | }; |
1135 | MODULE_ALIAS_FS("smb3"); | |
1136 | MODULE_ALIAS("smb3"); | |
1137 | ||
754661f1 | 1138 | const struct inode_operations cifs_dir_inode_ops = { |
1da177e4 | 1139 | .create = cifs_create, |
d2c12719 | 1140 | .atomic_open = cifs_atomic_open, |
1da177e4 LT |
1141 | .lookup = cifs_lookup, |
1142 | .getattr = cifs_getattr, | |
1143 | .unlink = cifs_unlink, | |
1144 | .link = cifs_hardlink, | |
1145 | .mkdir = cifs_mkdir, | |
1146 | .rmdir = cifs_rmdir, | |
2773bf00 | 1147 | .rename = cifs_rename2, |
1da177e4 | 1148 | .permission = cifs_permission, |
1da177e4 LT |
1149 | .setattr = cifs_setattr, |
1150 | .symlink = cifs_symlink, | |
1151 | .mknod = cifs_mknod, | |
1da177e4 | 1152 | .listxattr = cifs_listxattr, |
bd9684b0 | 1153 | .get_acl = cifs_get_acl, |
dc1af4c4 | 1154 | .set_acl = cifs_set_acl, |
1da177e4 LT |
1155 | }; |
1156 | ||
754661f1 | 1157 | const struct inode_operations cifs_file_inode_ops = { |
1da177e4 | 1158 | .setattr = cifs_setattr, |
48a77aa7 | 1159 | .getattr = cifs_getattr, |
1da177e4 | 1160 | .permission = cifs_permission, |
1da177e4 | 1161 | .listxattr = cifs_listxattr, |
2f3ebaba | 1162 | .fiemap = cifs_fiemap, |
bd9684b0 | 1163 | .get_acl = cifs_get_acl, |
dc1af4c4 | 1164 | .set_acl = cifs_set_acl, |
1da177e4 LT |
1165 | }; |
1166 | ||
542228db C |
1167 | const char *cifs_get_link(struct dentry *dentry, struct inode *inode, |
1168 | struct delayed_call *done) | |
1169 | { | |
1170 | char *target_path; | |
1171 | ||
0511fdb4 AV |
1172 | if (!dentry) |
1173 | return ERR_PTR(-ECHILD); | |
1174 | ||
542228db C |
1175 | target_path = kmalloc(PATH_MAX, GFP_KERNEL); |
1176 | if (!target_path) | |
1177 | return ERR_PTR(-ENOMEM); | |
1178 | ||
1179 | spin_lock(&inode->i_lock); | |
1180 | if (likely(CIFS_I(inode)->symlink_target)) { | |
1181 | strscpy(target_path, CIFS_I(inode)->symlink_target, PATH_MAX); | |
1182 | } else { | |
1183 | kfree(target_path); | |
1184 | target_path = ERR_PTR(-EOPNOTSUPP); | |
1185 | } | |
1186 | spin_unlock(&inode->i_lock); | |
1187 | ||
1188 | if (!IS_ERR(target_path)) | |
1189 | set_delayed_call(done, kfree_link, target_path); | |
1190 | ||
1191 | return target_path; | |
1192 | } | |
1193 | ||
754661f1 | 1194 | const struct inode_operations cifs_symlink_inode_ops = { |
542228db | 1195 | .get_link = cifs_get_link, |
475efd98 | 1196 | .setattr = cifs_setattr, |
1da177e4 | 1197 | .permission = cifs_permission, |
1da177e4 | 1198 | .listxattr = cifs_listxattr, |
1da177e4 LT |
1199 | }; |
1200 | ||
7b2404a8 DH |
1201 | /* |
1202 | * Advance the EOF marker to after the source range. | |
1203 | */ | |
1204 | static int cifs_precopy_set_eof(struct inode *src_inode, struct cifsInodeInfo *src_cifsi, | |
1205 | struct cifs_tcon *src_tcon, | |
1206 | unsigned int xid, loff_t src_end) | |
1207 | { | |
1208 | struct cifsFileInfo *writeable_srcfile; | |
1209 | int rc = -EINVAL; | |
1210 | ||
1211 | writeable_srcfile = find_writable_file(src_cifsi, FIND_WR_FSUID_ONLY); | |
1212 | if (writeable_srcfile) { | |
1213 | if (src_tcon->ses->server->ops->set_file_size) | |
1214 | rc = src_tcon->ses->server->ops->set_file_size( | |
1215 | xid, src_tcon, writeable_srcfile, | |
1216 | src_inode->i_size, true /* no need to set sparse */); | |
1217 | else | |
1218 | rc = -ENOSYS; | |
1219 | cifsFileInfo_put(writeable_srcfile); | |
1220 | cifs_dbg(FYI, "SetFSize for copychunk rc = %d\n", rc); | |
1221 | } | |
1222 | ||
1223 | if (rc < 0) | |
1224 | goto set_failed; | |
1225 | ||
100ccd18 | 1226 | netfs_resize_file(&src_cifsi->netfs, src_end, true); |
7b2404a8 DH |
1227 | fscache_resize_cookie(cifs_inode_cookie(src_inode), src_end); |
1228 | return 0; | |
1229 | ||
1230 | set_failed: | |
1231 | return filemap_write_and_wait(src_inode->i_mapping); | |
1232 | } | |
1233 | ||
1234 | /* | |
1235 | * Flush out either the folio that overlaps the beginning of a range in which | |
1236 | * pos resides or the folio that overlaps the end of a range unless that folio | |
1237 | * is entirely within the range we're going to invalidate. We extend the flush | |
1238 | * bounds to encompass the folio. | |
1239 | */ | |
1240 | static int cifs_flush_folio(struct inode *inode, loff_t pos, loff_t *_fstart, loff_t *_fend, | |
1241 | bool first) | |
1242 | { | |
1243 | struct folio *folio; | |
1244 | unsigned long long fpos, fend; | |
1245 | pgoff_t index = pos / PAGE_SIZE; | |
1246 | size_t size; | |
1247 | int rc = 0; | |
1248 | ||
1249 | folio = filemap_get_folio(inode->i_mapping, index); | |
1250 | if (IS_ERR(folio)) | |
1251 | return 0; | |
1252 | ||
1253 | size = folio_size(folio); | |
1254 | fpos = folio_pos(folio); | |
1255 | fend = fpos + size - 1; | |
1256 | *_fstart = min_t(unsigned long long, *_fstart, fpos); | |
1257 | *_fend = max_t(unsigned long long, *_fend, fend); | |
1258 | if ((first && pos == fpos) || (!first && pos == fend)) | |
1259 | goto out; | |
1260 | ||
1261 | rc = filemap_write_and_wait_range(inode->i_mapping, fpos, fend); | |
1262 | out: | |
1263 | folio_put(folio); | |
1264 | return rc; | |
1265 | } | |
1266 | ||
42ec3d4c DW |
1267 | static loff_t cifs_remap_file_range(struct file *src_file, loff_t off, |
1268 | struct file *dst_file, loff_t destoff, loff_t len, | |
2e5dfc99 | 1269 | unsigned int remap_flags) |
04b38d60 CH |
1270 | { |
1271 | struct inode *src_inode = file_inode(src_file); | |
1272 | struct inode *target_inode = file_inode(dst_file); | |
c54fc3a4 DH |
1273 | struct cifsInodeInfo *src_cifsi = CIFS_I(src_inode); |
1274 | struct cifsInodeInfo *target_cifsi = CIFS_I(target_inode); | |
04b38d60 | 1275 | struct cifsFileInfo *smb_file_src = src_file->private_data; |
c54fc3a4 DH |
1276 | struct cifsFileInfo *smb_file_target = dst_file->private_data; |
1277 | struct cifs_tcon *target_tcon, *src_tcon; | |
1278 | unsigned long long destend, fstart, fend, new_size; | |
04b38d60 CH |
1279 | unsigned int xid; |
1280 | int rc; | |
1281 | ||
691a41d8 DH |
1282 | if (remap_flags & REMAP_FILE_DEDUP) |
1283 | return -EOPNOTSUPP; | |
1284 | if (remap_flags & ~REMAP_FILE_ADVISORY) | |
2e5dfc99 DW |
1285 | return -EINVAL; |
1286 | ||
04b38d60 CH |
1287 | cifs_dbg(FYI, "clone range\n"); |
1288 | ||
1289 | xid = get_xid(); | |
1290 | ||
c54fc3a4 | 1291 | if (!smb_file_src || !smb_file_target) { |
04b38d60 CH |
1292 | rc = -EBADF; |
1293 | cifs_dbg(VFS, "missing cifsFileInfo on copy range src file\n"); | |
1294 | goto out; | |
1295 | } | |
1296 | ||
c54fc3a4 | 1297 | src_tcon = tlink_tcon(smb_file_src->tlink); |
8c6c9bed CIK |
1298 | target_tcon = tlink_tcon(smb_file_target->tlink); |
1299 | ||
04b38d60 CH |
1300 | /* |
1301 | * Note: cifs case is easier than btrfs since server responsible for | |
1302 | * checks for proper open modes and file type and if it wants | |
1303 | * server could even support copy of range where source = target | |
1304 | */ | |
1305 | lock_two_nondirectories(target_inode, src_inode); | |
1306 | ||
1307 | if (len == 0) | |
1308 | len = src_inode->i_size - off; | |
1309 | ||
c54fc3a4 DH |
1310 | cifs_dbg(FYI, "clone range\n"); |
1311 | ||
1312 | /* Flush the source buffer */ | |
1313 | rc = filemap_write_and_wait_range(src_inode->i_mapping, off, | |
1314 | off + len - 1); | |
1315 | if (rc) | |
1316 | goto unlock; | |
1317 | ||
1318 | /* The server-side copy will fail if the source crosses the EOF marker. | |
1319 | * Advance the EOF marker after the flush above to the end of the range | |
1320 | * if it's short of that. | |
1321 | */ | |
1322 | if (src_cifsi->netfs.remote_i_size < off + len) { | |
1323 | rc = cifs_precopy_set_eof(src_inode, src_cifsi, src_tcon, xid, off + len); | |
1324 | if (rc < 0) | |
1325 | goto unlock; | |
1326 | } | |
1327 | ||
1328 | new_size = destoff + len; | |
1329 | destend = destoff + len - 1; | |
04b38d60 | 1330 | |
c54fc3a4 DH |
1331 | /* Flush the folios at either end of the destination range to prevent |
1332 | * accidental loss of dirty data outside of the range. | |
1333 | */ | |
1334 | fstart = destoff; | |
1335 | fend = destend; | |
1336 | ||
1337 | rc = cifs_flush_folio(target_inode, destoff, &fstart, &fend, true); | |
1338 | if (rc) | |
1339 | goto unlock; | |
1340 | rc = cifs_flush_folio(target_inode, destend, &fstart, &fend, false); | |
1341 | if (rc) | |
1342 | goto unlock; | |
1343 | ||
1344 | /* Discard all the folios that overlap the destination region. */ | |
1345 | cifs_dbg(FYI, "about to discard pages %llx-%llx\n", fstart, fend); | |
1346 | truncate_inode_pages_range(&target_inode->i_data, fstart, fend); | |
1347 | ||
1348 | fscache_invalidate(cifs_inode_cookie(target_inode), NULL, | |
1349 | i_size_read(target_inode), 0); | |
1350 | ||
1351 | rc = -EOPNOTSUPP; | |
1352 | if (target_tcon->ses->server->ops->duplicate_extents) { | |
04b38d60 CH |
1353 | rc = target_tcon->ses->server->ops->duplicate_extents(xid, |
1354 | smb_file_src, smb_file_target, off, len, destoff); | |
c54fc3a4 DH |
1355 | if (rc == 0 && new_size > i_size_read(target_inode)) { |
1356 | truncate_setsize(target_inode, new_size); | |
100ccd18 | 1357 | netfs_resize_file(&target_cifsi->netfs, new_size, true); |
c54fc3a4 DH |
1358 | fscache_resize_cookie(cifs_inode_cookie(target_inode), |
1359 | new_size); | |
1360 | } | |
1361 | } | |
04b38d60 CH |
1362 | |
1363 | /* force revalidate of size and timestamps of target file now | |
1364 | that target is updated on the server */ | |
1365 | CIFS_I(target_inode)->time = 0; | |
c54fc3a4 | 1366 | unlock: |
04b38d60 CH |
1367 | /* although unlocking in the reverse order from locking is not |
1368 | strictly necessary here it is a little cleaner to be consistent */ | |
1369 | unlock_two_nondirectories(src_inode, target_inode); | |
1370 | out: | |
1371 | free_xid(xid); | |
42ec3d4c | 1372 | return rc < 0 ? rc : len; |
04b38d60 CH |
1373 | } |
1374 | ||
620d8745 SP |
1375 | ssize_t cifs_file_copychunk_range(unsigned int xid, |
1376 | struct file *src_file, loff_t off, | |
1377 | struct file *dst_file, loff_t destoff, | |
1378 | size_t len, unsigned int flags) | |
1379 | { | |
1380 | struct inode *src_inode = file_inode(src_file); | |
1381 | struct inode *target_inode = file_inode(dst_file); | |
7b2404a8 | 1382 | struct cifsInodeInfo *src_cifsi = CIFS_I(src_inode); |
966cc171 | 1383 | struct cifsInodeInfo *target_cifsi = CIFS_I(target_inode); |
620d8745 SP |
1384 | struct cifsFileInfo *smb_file_src; |
1385 | struct cifsFileInfo *smb_file_target; | |
1386 | struct cifs_tcon *src_tcon; | |
1387 | struct cifs_tcon *target_tcon; | |
7b2404a8 | 1388 | unsigned long long destend, fstart, fend; |
620d8745 SP |
1389 | ssize_t rc; |
1390 | ||
1391 | cifs_dbg(FYI, "copychunk range\n"); | |
1392 | ||
620d8745 SP |
1393 | if (!src_file->private_data || !dst_file->private_data) { |
1394 | rc = -EBADF; | |
1395 | cifs_dbg(VFS, "missing cifsFileInfo on copy range src file\n"); | |
1396 | goto out; | |
1397 | } | |
1398 | ||
1399 | rc = -EXDEV; | |
1400 | smb_file_target = dst_file->private_data; | |
1401 | smb_file_src = src_file->private_data; | |
1402 | src_tcon = tlink_tcon(smb_file_src->tlink); | |
1403 | target_tcon = tlink_tcon(smb_file_target->tlink); | |
1404 | ||
1405 | if (src_tcon->ses != target_tcon->ses) { | |
1406 | cifs_dbg(VFS, "source and target of copy not on same server\n"); | |
1407 | goto out; | |
1408 | } | |
1409 | ||
bf3c90ee AG |
1410 | rc = -EOPNOTSUPP; |
1411 | if (!target_tcon->ses->server->ops->copychunk_range) | |
1412 | goto out; | |
1413 | ||
620d8745 SP |
1414 | /* |
1415 | * Note: cifs case is easier than btrfs since server responsible for | |
1416 | * checks for proper open modes and file type and if it wants | |
1417 | * server could even support copy of range where source = target | |
1418 | */ | |
1419 | lock_two_nondirectories(target_inode, src_inode); | |
1420 | ||
1421 | cifs_dbg(FYI, "about to flush pages\n"); | |
3e3761f1 SF |
1422 | |
1423 | rc = filemap_write_and_wait_range(src_inode->i_mapping, off, | |
1424 | off + len - 1); | |
1425 | if (rc) | |
50248784 | 1426 | goto unlock; |
3e3761f1 | 1427 | |
7b2404a8 DH |
1428 | /* The server-side copy will fail if the source crosses the EOF marker. |
1429 | * Advance the EOF marker after the flush above to the end of the range | |
1430 | * if it's short of that. | |
1431 | */ | |
966cc171 | 1432 | if (src_cifsi->netfs.remote_i_size < off + len) { |
7b2404a8 DH |
1433 | rc = cifs_precopy_set_eof(src_inode, src_cifsi, src_tcon, xid, off + len); |
1434 | if (rc < 0) | |
1435 | goto unlock; | |
1436 | } | |
1437 | ||
1438 | destend = destoff + len - 1; | |
1439 | ||
1440 | /* Flush the folios at either end of the destination range to prevent | |
1441 | * accidental loss of dirty data outside of the range. | |
1442 | */ | |
1443 | fstart = destoff; | |
1444 | fend = destend; | |
1445 | ||
1446 | rc = cifs_flush_folio(target_inode, destoff, &fstart, &fend, true); | |
1447 | if (rc) | |
1448 | goto unlock; | |
1449 | rc = cifs_flush_folio(target_inode, destend, &fstart, &fend, false); | |
1450 | if (rc) | |
1451 | goto unlock; | |
1452 | ||
1453 | /* Discard all the folios that overlap the destination region. */ | |
1454 | truncate_inode_pages_range(&target_inode->i_data, fstart, fend); | |
620d8745 | 1455 | |
966cc171 DH |
1456 | fscache_invalidate(cifs_inode_cookie(target_inode), NULL, |
1457 | i_size_read(target_inode), 0); | |
1458 | ||
bf3c90ee | 1459 | rc = file_modified(dst_file); |
7b2404a8 | 1460 | if (!rc) { |
620d8745 SP |
1461 | rc = target_tcon->ses->server->ops->copychunk_range(xid, |
1462 | smb_file_src, smb_file_target, off, len, destoff); | |
966cc171 | 1463 | if (rc > 0 && destoff + rc > i_size_read(target_inode)) { |
7b2404a8 | 1464 | truncate_setsize(target_inode, destoff + rc); |
966cc171 DH |
1465 | netfs_resize_file(&target_cifsi->netfs, |
1466 | i_size_read(target_inode), true); | |
1467 | fscache_resize_cookie(cifs_inode_cookie(target_inode), | |
1468 | i_size_read(target_inode)); | |
1469 | } | |
1470 | if (rc > 0 && destoff + rc > target_cifsi->netfs.zero_point) | |
1471 | target_cifsi->netfs.zero_point = destoff + rc; | |
7b2404a8 | 1472 | } |
bf3c90ee AG |
1473 | |
1474 | file_accessed(src_file); | |
620d8745 SP |
1475 | |
1476 | /* force revalidate of size and timestamps of target file now | |
1477 | * that target is updated on the server | |
1478 | */ | |
1479 | CIFS_I(target_inode)->time = 0; | |
50248784 C |
1480 | |
1481 | unlock: | |
620d8745 SP |
1482 | /* although unlocking in the reverse order from locking is not |
1483 | * strictly necessary here it is a little cleaner to be consistent | |
1484 | */ | |
1485 | unlock_two_nondirectories(src_inode, target_inode); | |
1486 | ||
1487 | out: | |
1488 | return rc; | |
1489 | } | |
1490 | ||
6e70c267 SF |
1491 | /* |
1492 | * Directory operations under CIFS/SMB2/SMB3 are synchronous, so fsync() | |
1493 | * is a dummy operation. | |
1494 | */ | |
1495 | static int cifs_dir_fsync(struct file *file, loff_t start, loff_t end, int datasync) | |
1496 | { | |
1497 | cifs_dbg(FYI, "Sync directory - name: %pD datasync: 0x%x\n", | |
1498 | file, datasync); | |
1499 | ||
1500 | return 0; | |
1501 | } | |
1502 | ||
620d8745 SP |
1503 | static ssize_t cifs_copy_file_range(struct file *src_file, loff_t off, |
1504 | struct file *dst_file, loff_t destoff, | |
1505 | size_t len, unsigned int flags) | |
1506 | { | |
1507 | unsigned int xid = get_xid(); | |
1508 | ssize_t rc; | |
4e8aea30 SF |
1509 | struct cifsFileInfo *cfile = dst_file->private_data; |
1510 | ||
9a97df40 ZX |
1511 | if (cfile->swapfile) { |
1512 | rc = -EOPNOTSUPP; | |
1513 | free_xid(xid); | |
1514 | return rc; | |
1515 | } | |
620d8745 SP |
1516 | |
1517 | rc = cifs_file_copychunk_range(xid, src_file, off, dst_file, destoff, | |
1518 | len, flags); | |
1519 | free_xid(xid); | |
64bf5ff5 | 1520 | |
5dae222a | 1521 | if (rc == -EOPNOTSUPP || rc == -EXDEV) |
705bcfcb AG |
1522 | rc = splice_copy_file_range(src_file, off, dst_file, |
1523 | destoff, len); | |
620d8745 SP |
1524 | return rc; |
1525 | } | |
1526 | ||
4b6f5d20 | 1527 | const struct file_operations cifs_file_ops = { |
08bc0353 | 1528 | .read_iter = cifs_loose_read_iter, |
3dae8750 | 1529 | .write_iter = cifs_file_write_iter, |
1da177e4 LT |
1530 | .open = cifs_open, |
1531 | .release = cifs_close, | |
1532 | .lock = cifs_lock, | |
d0677992 | 1533 | .flock = cifs_flock, |
1da177e4 LT |
1534 | .fsync = cifs_fsync, |
1535 | .flush = cifs_flush, | |
1536 | .mmap = cifs_file_mmap, | |
ab825131 | 1537 | .splice_read = filemap_splice_read, |
cd1aca29 | 1538 | .splice_write = iter_file_splice_write, |
c32a0b68 | 1539 | .llseek = cifs_llseek, |
f9ddcca4 | 1540 | .unlocked_ioctl = cifs_ioctl, |
620d8745 | 1541 | .copy_file_range = cifs_copy_file_range, |
2e5dfc99 | 1542 | .remap_file_range = cifs_remap_file_range, |
84210e91 | 1543 | .setlease = cifs_setlease, |
31742c5a | 1544 | .fallocate = cifs_fallocate, |
1da177e4 LT |
1545 | }; |
1546 | ||
8be7e6ba | 1547 | const struct file_operations cifs_file_strict_ops = { |
e6a7bcb4 | 1548 | .read_iter = cifs_strict_readv, |
3dae8750 | 1549 | .write_iter = cifs_strict_writev, |
8be7e6ba PS |
1550 | .open = cifs_open, |
1551 | .release = cifs_close, | |
1552 | .lock = cifs_lock, | |
d0677992 | 1553 | .flock = cifs_flock, |
8be7e6ba PS |
1554 | .fsync = cifs_strict_fsync, |
1555 | .flush = cifs_flush, | |
7a6a19b1 | 1556 | .mmap = cifs_file_strict_mmap, |
ab825131 | 1557 | .splice_read = filemap_splice_read, |
cd1aca29 | 1558 | .splice_write = iter_file_splice_write, |
8be7e6ba | 1559 | .llseek = cifs_llseek, |
8be7e6ba | 1560 | .unlocked_ioctl = cifs_ioctl, |
620d8745 | 1561 | .copy_file_range = cifs_copy_file_range, |
2e5dfc99 | 1562 | .remap_file_range = cifs_remap_file_range, |
8be7e6ba | 1563 | .setlease = cifs_setlease, |
31742c5a | 1564 | .fallocate = cifs_fallocate, |
8be7e6ba PS |
1565 | }; |
1566 | ||
4b6f5d20 | 1567 | const struct file_operations cifs_file_direct_ops = { |
be4eb688 LL |
1568 | .read_iter = cifs_direct_readv, |
1569 | .write_iter = cifs_direct_writev, | |
1da177e4 LT |
1570 | .open = cifs_open, |
1571 | .release = cifs_close, | |
1572 | .lock = cifs_lock, | |
d0677992 | 1573 | .flock = cifs_flock, |
1da177e4 LT |
1574 | .fsync = cifs_fsync, |
1575 | .flush = cifs_flush, | |
a994b8fa | 1576 | .mmap = cifs_file_mmap, |
69df79a4 | 1577 | .splice_read = copy_splice_read, |
cd1aca29 | 1578 | .splice_write = iter_file_splice_write, |
f9ddcca4 | 1579 | .unlocked_ioctl = cifs_ioctl, |
620d8745 | 1580 | .copy_file_range = cifs_copy_file_range, |
2e5dfc99 | 1581 | .remap_file_range = cifs_remap_file_range, |
c32a0b68 | 1582 | .llseek = cifs_llseek, |
84210e91 | 1583 | .setlease = cifs_setlease, |
31742c5a | 1584 | .fallocate = cifs_fallocate, |
1da177e4 | 1585 | }; |
8be7e6ba | 1586 | |
4b6f5d20 | 1587 | const struct file_operations cifs_file_nobrl_ops = { |
08bc0353 | 1588 | .read_iter = cifs_loose_read_iter, |
3dae8750 | 1589 | .write_iter = cifs_file_write_iter, |
87c89dd7 SF |
1590 | .open = cifs_open, |
1591 | .release = cifs_close, | |
1592 | .fsync = cifs_fsync, | |
1593 | .flush = cifs_flush, | |
1594 | .mmap = cifs_file_mmap, | |
ab825131 | 1595 | .splice_read = filemap_splice_read, |
cd1aca29 | 1596 | .splice_write = iter_file_splice_write, |
c32a0b68 | 1597 | .llseek = cifs_llseek, |
f9ddcca4 | 1598 | .unlocked_ioctl = cifs_ioctl, |
620d8745 | 1599 | .copy_file_range = cifs_copy_file_range, |
2e5dfc99 | 1600 | .remap_file_range = cifs_remap_file_range, |
84210e91 | 1601 | .setlease = cifs_setlease, |
31742c5a | 1602 | .fallocate = cifs_fallocate, |
8b94bcb9 SF |
1603 | }; |
1604 | ||
8be7e6ba | 1605 | const struct file_operations cifs_file_strict_nobrl_ops = { |
e6a7bcb4 | 1606 | .read_iter = cifs_strict_readv, |
3dae8750 | 1607 | .write_iter = cifs_strict_writev, |
8be7e6ba PS |
1608 | .open = cifs_open, |
1609 | .release = cifs_close, | |
1610 | .fsync = cifs_strict_fsync, | |
1611 | .flush = cifs_flush, | |
7a6a19b1 | 1612 | .mmap = cifs_file_strict_mmap, |
ab825131 | 1613 | .splice_read = filemap_splice_read, |
cd1aca29 | 1614 | .splice_write = iter_file_splice_write, |
8be7e6ba | 1615 | .llseek = cifs_llseek, |
8be7e6ba | 1616 | .unlocked_ioctl = cifs_ioctl, |
620d8745 | 1617 | .copy_file_range = cifs_copy_file_range, |
2e5dfc99 | 1618 | .remap_file_range = cifs_remap_file_range, |
8be7e6ba | 1619 | .setlease = cifs_setlease, |
31742c5a | 1620 | .fallocate = cifs_fallocate, |
8be7e6ba PS |
1621 | }; |
1622 | ||
4b6f5d20 | 1623 | const struct file_operations cifs_file_direct_nobrl_ops = { |
be4eb688 LL |
1624 | .read_iter = cifs_direct_readv, |
1625 | .write_iter = cifs_direct_writev, | |
87c89dd7 SF |
1626 | .open = cifs_open, |
1627 | .release = cifs_close, | |
1628 | .fsync = cifs_fsync, | |
1629 | .flush = cifs_flush, | |
810627a0 | 1630 | .mmap = cifs_file_mmap, |
69df79a4 | 1631 | .splice_read = copy_splice_read, |
cd1aca29 | 1632 | .splice_write = iter_file_splice_write, |
f9ddcca4 | 1633 | .unlocked_ioctl = cifs_ioctl, |
620d8745 | 1634 | .copy_file_range = cifs_copy_file_range, |
2e5dfc99 | 1635 | .remap_file_range = cifs_remap_file_range, |
c32a0b68 | 1636 | .llseek = cifs_llseek, |
84210e91 | 1637 | .setlease = cifs_setlease, |
31742c5a | 1638 | .fallocate = cifs_fallocate, |
8b94bcb9 | 1639 | }; |
1da177e4 | 1640 | |
4b6f5d20 | 1641 | const struct file_operations cifs_dir_ops = { |
3125d265 | 1642 | .iterate_shared = cifs_readdir, |
1da177e4 LT |
1643 | .release = cifs_closedir, |
1644 | .read = generic_read_dir, | |
f9ddcca4 | 1645 | .unlocked_ioctl = cifs_ioctl, |
620d8745 | 1646 | .copy_file_range = cifs_copy_file_range, |
2e5dfc99 | 1647 | .remap_file_range = cifs_remap_file_range, |
3222a3e5 | 1648 | .llseek = generic_file_llseek, |
6e70c267 | 1649 | .fsync = cifs_dir_fsync, |
1da177e4 LT |
1650 | }; |
1651 | ||
1652 | static void | |
51cc5068 | 1653 | cifs_init_once(void *inode) |
1da177e4 LT |
1654 | { |
1655 | struct cifsInodeInfo *cifsi = inode; | |
1656 | ||
874c8ca1 | 1657 | inode_init_once(&cifsi->netfs.inode); |
1b4b55a1 | 1658 | init_rwsem(&cifsi->lock_sem); |
1da177e4 LT |
1659 | } |
1660 | ||
9ee108b2 | 1661 | static int __init |
1da177e4 LT |
1662 | cifs_init_inodecache(void) |
1663 | { | |
1664 | cifs_inode_cachep = kmem_cache_create("cifs_inode_cache", | |
26f57364 | 1665 | sizeof(struct cifsInodeInfo), |
fffb60f9 | 1666 | 0, (SLAB_RECLAIM_ACCOUNT| |
f88c3fb8 | 1667 | SLAB_ACCOUNT), |
20c2df83 | 1668 | cifs_init_once); |
1da177e4 LT |
1669 | if (cifs_inode_cachep == NULL) |
1670 | return -ENOMEM; | |
1671 | ||
1672 | return 0; | |
1673 | } | |
1674 | ||
1675 | static void | |
1676 | cifs_destroy_inodecache(void) | |
1677 | { | |
8c0a8537 KS |
1678 | /* |
1679 | * Make sure all delayed rcu free inodes are flushed before we | |
1680 | * destroy cache. | |
1681 | */ | |
1682 | rcu_barrier(); | |
1a1d92c1 | 1683 | kmem_cache_destroy(cifs_inode_cachep); |
1da177e4 LT |
1684 | } |
1685 | ||
1686 | static int | |
1687 | cifs_init_request_bufs(void) | |
1688 | { | |
3792c173 PS |
1689 | /* |
1690 | * SMB2 maximum header size is bigger than CIFS one - no problems to | |
1691 | * allocate some more bytes for CIFS. | |
1692 | */ | |
2a38e120 SF |
1693 | size_t max_hdr_size = MAX_SMB2_HDR_SIZE; |
1694 | ||
4523cc30 | 1695 | if (CIFSMaxBufSize < 8192) { |
1da177e4 LT |
1696 | /* Buffer size can not be smaller than 2 * PATH_MAX since maximum |
1697 | Unicode path name has to fit in any SMB/CIFS path based frames */ | |
1698 | CIFSMaxBufSize = 8192; | |
1699 | } else if (CIFSMaxBufSize > 1024*127) { | |
1700 | CIFSMaxBufSize = 1024 * 127; | |
1701 | } else { | |
1702 | CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/ | |
1703 | } | |
f96637be JP |
1704 | /* |
1705 | cifs_dbg(VFS, "CIFSMaxBufSize %d 0x%x\n", | |
1706 | CIFSMaxBufSize, CIFSMaxBufSize); | |
1707 | */ | |
de046449 | 1708 | cifs_req_cachep = kmem_cache_create_usercopy("cifs_request", |
3792c173 | 1709 | CIFSMaxBufSize + max_hdr_size, 0, |
de046449 DW |
1710 | SLAB_HWCACHE_ALIGN, 0, |
1711 | CIFSMaxBufSize + max_hdr_size, | |
1712 | NULL); | |
1da177e4 LT |
1713 | if (cifs_req_cachep == NULL) |
1714 | return -ENOMEM; | |
1715 | ||
4523cc30 | 1716 | if (cifs_min_rcv < 1) |
1da177e4 LT |
1717 | cifs_min_rcv = 1; |
1718 | else if (cifs_min_rcv > 64) { | |
1719 | cifs_min_rcv = 64; | |
f96637be | 1720 | cifs_dbg(VFS, "cifs_min_rcv set to maximum (64)\n"); |
1da177e4 LT |
1721 | } |
1722 | ||
93d2341c MD |
1723 | cifs_req_poolp = mempool_create_slab_pool(cifs_min_rcv, |
1724 | cifs_req_cachep); | |
1da177e4 | 1725 | |
4523cc30 | 1726 | if (cifs_req_poolp == NULL) { |
1da177e4 LT |
1727 | kmem_cache_destroy(cifs_req_cachep); |
1728 | return -ENOMEM; | |
1729 | } | |
ec637e3f | 1730 | /* MAX_CIFS_SMALL_BUFFER_SIZE bytes is enough for most SMB responses and |
1da177e4 LT |
1731 | almost all handle based requests (but not write response, nor is it |
1732 | sufficient for path based requests). A smaller size would have | |
50c2f753 | 1733 | been more efficient (compacting multiple slab items on one 4k page) |
1da177e4 LT |
1734 | for the case in which debug was on, but this larger size allows |
1735 | more SMBs to use small buffer alloc and is still much more | |
6dc0f87e | 1736 | efficient to alloc 1 per page off the slab compared to 17K (5page) |
1da177e4 | 1737 | alloc of large cifs buffers even when page debugging is on */ |
de046449 | 1738 | cifs_sm_req_cachep = kmem_cache_create_usercopy("cifs_small_rq", |
6dc0f87e | 1739 | MAX_CIFS_SMALL_BUFFER_SIZE, 0, SLAB_HWCACHE_ALIGN, |
de046449 | 1740 | 0, MAX_CIFS_SMALL_BUFFER_SIZE, NULL); |
1da177e4 LT |
1741 | if (cifs_sm_req_cachep == NULL) { |
1742 | mempool_destroy(cifs_req_poolp); | |
1743 | kmem_cache_destroy(cifs_req_cachep); | |
6dc0f87e | 1744 | return -ENOMEM; |
1da177e4 LT |
1745 | } |
1746 | ||
4523cc30 | 1747 | if (cifs_min_small < 2) |
1da177e4 LT |
1748 | cifs_min_small = 2; |
1749 | else if (cifs_min_small > 256) { | |
1750 | cifs_min_small = 256; | |
f96637be | 1751 | cifs_dbg(FYI, "cifs_min_small set to maximum (256)\n"); |
1da177e4 LT |
1752 | } |
1753 | ||
93d2341c MD |
1754 | cifs_sm_req_poolp = mempool_create_slab_pool(cifs_min_small, |
1755 | cifs_sm_req_cachep); | |
1da177e4 | 1756 | |
4523cc30 | 1757 | if (cifs_sm_req_poolp == NULL) { |
1da177e4 LT |
1758 | mempool_destroy(cifs_req_poolp); |
1759 | kmem_cache_destroy(cifs_req_cachep); | |
1760 | kmem_cache_destroy(cifs_sm_req_cachep); | |
1761 | return -ENOMEM; | |
1762 | } | |
1763 | ||
1764 | return 0; | |
1765 | } | |
1766 | ||
1767 | static void | |
1768 | cifs_destroy_request_bufs(void) | |
1769 | { | |
1770 | mempool_destroy(cifs_req_poolp); | |
1a1d92c1 | 1771 | kmem_cache_destroy(cifs_req_cachep); |
1da177e4 | 1772 | mempool_destroy(cifs_sm_req_poolp); |
1a1d92c1 | 1773 | kmem_cache_destroy(cifs_sm_req_cachep); |
1da177e4 LT |
1774 | } |
1775 | ||
f5fd3f28 | 1776 | static int init_mids(void) |
1da177e4 LT |
1777 | { |
1778 | cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids", | |
26f57364 SF |
1779 | sizeof(struct mid_q_entry), 0, |
1780 | SLAB_HWCACHE_ALIGN, NULL); | |
1da177e4 LT |
1781 | if (cifs_mid_cachep == NULL) |
1782 | return -ENOMEM; | |
1783 | ||
93d2341c MD |
1784 | /* 3 is a reasonable minimum number of simultaneous operations */ |
1785 | cifs_mid_poolp = mempool_create_slab_pool(3, cifs_mid_cachep); | |
4523cc30 | 1786 | if (cifs_mid_poolp == NULL) { |
1da177e4 LT |
1787 | kmem_cache_destroy(cifs_mid_cachep); |
1788 | return -ENOMEM; | |
1789 | } | |
1790 | ||
1da177e4 LT |
1791 | return 0; |
1792 | } | |
1793 | ||
f5fd3f28 | 1794 | static void destroy_mids(void) |
1da177e4 LT |
1795 | { |
1796 | mempool_destroy(cifs_mid_poolp); | |
1a1d92c1 | 1797 | kmem_cache_destroy(cifs_mid_cachep); |
1da177e4 LT |
1798 | } |
1799 | ||
1da177e4 LT |
1800 | static int __init |
1801 | init_cifs(void) | |
1802 | { | |
1803 | int rc = 0; | |
1da177e4 | 1804 | cifs_proc_init(); |
e7ddee90 | 1805 | INIT_LIST_HEAD(&cifs_tcp_ses_list); |
1da177e4 LT |
1806 | /* |
1807 | * Initialize Global counters | |
1808 | */ | |
1809 | atomic_set(&sesInfoAllocCount, 0); | |
1810 | atomic_set(&tconInfoAllocCount, 0); | |
6d82c27a | 1811 | atomic_set(&tcpSesNextId, 0); |
6dc0f87e | 1812 | atomic_set(&tcpSesAllocCount, 0); |
1da177e4 LT |
1813 | atomic_set(&tcpSesReconnectCount, 0); |
1814 | atomic_set(&tconInfoReconnectCount, 0); | |
1815 | ||
c2c17ddb SF |
1816 | atomic_set(&buf_alloc_count, 0); |
1817 | atomic_set(&small_buf_alloc_count, 0); | |
4498eed5 | 1818 | #ifdef CONFIG_CIFS_STATS2 |
c2c17ddb SF |
1819 | atomic_set(&total_buf_alloc_count, 0); |
1820 | atomic_set(&total_small_buf_alloc_count, 0); | |
00778e22 SF |
1821 | if (slow_rsp_threshold < 1) |
1822 | cifs_dbg(FYI, "slow_response_threshold msgs disabled\n"); | |
1823 | else if (slow_rsp_threshold > 32767) | |
1824 | cifs_dbg(VFS, | |
1825 | "slow response threshold set higher than recommended (0 to 32767)\n"); | |
4498eed5 SF |
1826 | #endif /* CONFIG_CIFS_STATS2 */ |
1827 | ||
c2c17ddb | 1828 | atomic_set(&mid_count, 0); |
1da177e4 LT |
1829 | GlobalCurrentXid = 0; |
1830 | GlobalTotalActiveXid = 0; | |
1831 | GlobalMaxActiveXid = 0; | |
3f9bcca7 | 1832 | spin_lock_init(&cifs_tcp_ses_lock); |
1da177e4 LT |
1833 | spin_lock_init(&GlobalMid_Lock); |
1834 | ||
51b0817b | 1835 | cifs_lock_secret = get_random_u32(); |
3d22462a | 1836 | |
4523cc30 | 1837 | if (cifs_max_pending < 2) { |
1da177e4 | 1838 | cifs_max_pending = 2; |
f96637be | 1839 | cifs_dbg(FYI, "cifs_max_pending set to min of 2\n"); |
10b9b98e PS |
1840 | } else if (cifs_max_pending > CIFS_MAX_REQ) { |
1841 | cifs_max_pending = CIFS_MAX_REQ; | |
f96637be JP |
1842 | cifs_dbg(FYI, "cifs_max_pending set to max of %u\n", |
1843 | CIFS_MAX_REQ); | |
1da177e4 LT |
1844 | } |
1845 | ||
238b351d SF |
1846 | /* Limit max to about 18 hours, and setting to zero disables directory entry caching */ |
1847 | if (dir_cache_timeout > 65000) { | |
1848 | dir_cache_timeout = 65000; | |
1849 | cifs_dbg(VFS, "dir_cache_timeout set to max of 65000 seconds\n"); | |
1850 | } | |
1851 | ||
da472fc8 JL |
1852 | cifsiod_wq = alloc_workqueue("cifsiod", WQ_FREEZABLE|WQ_MEM_RECLAIM, 0); |
1853 | if (!cifsiod_wq) { | |
1854 | rc = -ENOMEM; | |
1855 | goto out_clean_proc; | |
1856 | } | |
1857 | ||
35cf94a3 | 1858 | /* |
10328c44 SF |
1859 | * Consider in future setting limit!=0 maybe to min(num_of_cores - 1, 3) |
1860 | * so that we don't launch too many worker threads but | |
0ac624f4 | 1861 | * Documentation/core-api/workqueue.rst recommends setting it to 0 |
35cf94a3 | 1862 | */ |
10328c44 SF |
1863 | |
1864 | /* WQ_UNBOUND allows decrypt tasks to run on any CPU */ | |
35cf94a3 | 1865 | decrypt_wq = alloc_workqueue("smb3decryptd", |
10328c44 | 1866 | WQ_UNBOUND|WQ_FREEZABLE|WQ_MEM_RECLAIM, 0); |
35cf94a3 SF |
1867 | if (!decrypt_wq) { |
1868 | rc = -ENOMEM; | |
1869 | goto out_destroy_cifsiod_wq; | |
1870 | } | |
1871 | ||
32546a95 RS |
1872 | fileinfo_put_wq = alloc_workqueue("cifsfileinfoput", |
1873 | WQ_UNBOUND|WQ_FREEZABLE|WQ_MEM_RECLAIM, 0); | |
1874 | if (!fileinfo_put_wq) { | |
1875 | rc = -ENOMEM; | |
1876 | goto out_destroy_decrypt_wq; | |
1877 | } | |
1878 | ||
3998e6b8 RV |
1879 | cifsoplockd_wq = alloc_workqueue("cifsoplockd", |
1880 | WQ_FREEZABLE|WQ_MEM_RECLAIM, 0); | |
1881 | if (!cifsoplockd_wq) { | |
1882 | rc = -ENOMEM; | |
32546a95 | 1883 | goto out_destroy_fileinfo_put_wq; |
3998e6b8 RV |
1884 | } |
1885 | ||
c3f207ab RS |
1886 | deferredclose_wq = alloc_workqueue("deferredclose", |
1887 | WQ_FREEZABLE|WQ_MEM_RECLAIM, 0); | |
1888 | if (!deferredclose_wq) { | |
1889 | rc = -ENOMEM; | |
1890 | goto out_destroy_cifsoplockd_wq; | |
1891 | } | |
1892 | ||
1da177e4 | 1893 | rc = cifs_init_inodecache(); |
45af7a0f | 1894 | if (rc) |
70431bfd | 1895 | goto out_destroy_deferredclose_wq; |
45af7a0f | 1896 | |
f5fd3f28 | 1897 | rc = init_mids(); |
45af7a0f SF |
1898 | if (rc) |
1899 | goto out_destroy_inodecache; | |
1900 | ||
1901 | rc = cifs_init_request_bufs(); | |
1902 | if (rc) | |
1903 | goto out_destroy_mids; | |
1904 | ||
1c780228 PA |
1905 | #ifdef CONFIG_CIFS_DFS_UPCALL |
1906 | rc = dfs_cache_init(); | |
1907 | if (rc) | |
1908 | goto out_destroy_request_bufs; | |
1909 | #endif /* CONFIG_CIFS_DFS_UPCALL */ | |
84a15b93 | 1910 | #ifdef CONFIG_CIFS_UPCALL |
b74cb9a8 | 1911 | rc = init_cifs_spnego(); |
84a15b93 | 1912 | if (rc) |
1c780228 | 1913 | goto out_destroy_dfs_cache; |
4d79dba0 | 1914 | #endif /* CONFIG_CIFS_UPCALL */ |
06f08dab SC |
1915 | #ifdef CONFIG_CIFS_SWN_UPCALL |
1916 | rc = cifs_genl_init(); | |
1917 | if (rc) | |
1918 | goto out_register_key_type; | |
1919 | #endif /* CONFIG_CIFS_SWN_UPCALL */ | |
4d79dba0 | 1920 | |
4d79dba0 SP |
1921 | rc = init_cifs_idmap(); |
1922 | if (rc) | |
06f08dab | 1923 | goto out_cifs_swn_init; |
4d79dba0 SP |
1924 | |
1925 | rc = register_filesystem(&cifs_fs_type); | |
1926 | if (rc) | |
c4aca0c0 | 1927 | goto out_init_cifs_idmap; |
45af7a0f | 1928 | |
49218b4f SF |
1929 | rc = register_filesystem(&smb3_fs_type); |
1930 | if (rc) { | |
1931 | unregister_filesystem(&cifs_fs_type); | |
1932 | goto out_init_cifs_idmap; | |
1933 | } | |
1934 | ||
45af7a0f SF |
1935 | return 0; |
1936 | ||
c4aca0c0 | 1937 | out_init_cifs_idmap: |
4d79dba0 | 1938 | exit_cifs_idmap(); |
06f08dab SC |
1939 | out_cifs_swn_init: |
1940 | #ifdef CONFIG_CIFS_SWN_UPCALL | |
1941 | cifs_genl_exit(); | |
c4aca0c0 | 1942 | out_register_key_type: |
06f08dab | 1943 | #endif |
84a15b93 | 1944 | #ifdef CONFIG_CIFS_UPCALL |
b74cb9a8 | 1945 | exit_cifs_spnego(); |
1c780228 PA |
1946 | out_destroy_dfs_cache: |
1947 | #endif | |
1948 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
1949 | dfs_cache_destroy(); | |
c4aca0c0 | 1950 | out_destroy_request_bufs: |
1fc7995d | 1951 | #endif |
45af7a0f | 1952 | cifs_destroy_request_bufs(); |
d3bf5221 | 1953 | out_destroy_mids: |
f5fd3f28 | 1954 | destroy_mids(); |
d3bf5221 | 1955 | out_destroy_inodecache: |
45af7a0f | 1956 | cifs_destroy_inodecache(); |
c3f207ab RS |
1957 | out_destroy_deferredclose_wq: |
1958 | destroy_workqueue(deferredclose_wq); | |
3998e6b8 RV |
1959 | out_destroy_cifsoplockd_wq: |
1960 | destroy_workqueue(cifsoplockd_wq); | |
32546a95 RS |
1961 | out_destroy_fileinfo_put_wq: |
1962 | destroy_workqueue(fileinfo_put_wq); | |
35cf94a3 SF |
1963 | out_destroy_decrypt_wq: |
1964 | destroy_workqueue(decrypt_wq); | |
3998e6b8 | 1965 | out_destroy_cifsiod_wq: |
da472fc8 | 1966 | destroy_workqueue(cifsiod_wq); |
d3bf5221 SF |
1967 | out_clean_proc: |
1968 | cifs_proc_clean(); | |
1da177e4 LT |
1969 | return rc; |
1970 | } | |
1971 | ||
1972 | static void __exit | |
1973 | exit_cifs(void) | |
1974 | { | |
49218b4f | 1975 | cifs_dbg(NOISY, "exit_smb3\n"); |
3dd93306 | 1976 | unregister_filesystem(&cifs_fs_type); |
49218b4f | 1977 | unregister_filesystem(&smb3_fs_type); |
0a049935 | 1978 | cifs_release_automount_timer(); |
4d79dba0 | 1979 | exit_cifs_idmap(); |
06f08dab SC |
1980 | #ifdef CONFIG_CIFS_SWN_UPCALL |
1981 | cifs_genl_exit(); | |
1982 | #endif | |
84a15b93 | 1983 | #ifdef CONFIG_CIFS_UPCALL |
94183331 | 1984 | exit_cifs_spnego(); |
1c780228 PA |
1985 | #endif |
1986 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
1987 | dfs_cache_destroy(); | |
1da177e4 | 1988 | #endif |
1da177e4 | 1989 | cifs_destroy_request_bufs(); |
f5fd3f28 | 1990 | destroy_mids(); |
3dd93306 | 1991 | cifs_destroy_inodecache(); |
c3f207ab | 1992 | destroy_workqueue(deferredclose_wq); |
3998e6b8 | 1993 | destroy_workqueue(cifsoplockd_wq); |
35cf94a3 | 1994 | destroy_workqueue(decrypt_wq); |
32546a95 | 1995 | destroy_workqueue(fileinfo_put_wq); |
da472fc8 | 1996 | destroy_workqueue(cifsiod_wq); |
3dd93306 | 1997 | cifs_proc_clean(); |
1da177e4 LT |
1998 | } |
1999 | ||
1c3a13a3 | 2000 | MODULE_AUTHOR("Steve French"); |
6dc0f87e | 2001 | MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */ |
1da177e4 | 2002 | MODULE_DESCRIPTION |
1c3a13a3 SF |
2003 | ("VFS to access SMB3 servers e.g. Samba, Macs, Azure and Windows (and " |
2004 | "also older servers complying with the SNIA CIFS Specification)"); | |
1da177e4 | 2005 | MODULE_VERSION(CIFS_VERSION); |
3591bb83 RS |
2006 | MODULE_SOFTDEP("ecb"); |
2007 | MODULE_SOFTDEP("hmac"); | |
3591bb83 RS |
2008 | MODULE_SOFTDEP("md5"); |
2009 | MODULE_SOFTDEP("nls"); | |
2010 | MODULE_SOFTDEP("aes"); | |
2011 | MODULE_SOFTDEP("cmac"); | |
2012 | MODULE_SOFTDEP("sha256"); | |
2013 | MODULE_SOFTDEP("sha512"); | |
2014 | MODULE_SOFTDEP("aead2"); | |
2015 | MODULE_SOFTDEP("ccm"); | |
2016 | MODULE_SOFTDEP("gcm"); | |
1da177e4 LT |
2017 | module_init(init_cifs) |
2018 | module_exit(exit_cifs) |