Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * fs/cifs/cifsfs.c |
| 3 | * |
| 4 | * Copyright (C) International Business Machines Corp., 2002,2004 |
| 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> |
Steve French | 6ab16d2 | 2005-11-29 20:55:11 -0800 | [diff] [blame] | 35 | #include <linux/delay.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include "cifsfs.h" |
| 37 | #include "cifspdu.h" |
| 38 | #define DECLARE_GLOBALS_HERE |
| 39 | #include "cifsglob.h" |
| 40 | #include "cifsproto.h" |
| 41 | #include "cifs_debug.h" |
| 42 | #include "cifs_fs_sb.h" |
| 43 | #include <linux/mm.h> |
| 44 | #define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */ |
| 45 | |
| 46 | #ifdef CONFIG_CIFS_QUOTA |
| 47 | static struct quotactl_ops cifs_quotactl_ops; |
| 48 | #endif |
| 49 | |
| 50 | int cifsFYI = 0; |
| 51 | int cifsERROR = 1; |
| 52 | int traceSMB = 0; |
| 53 | unsigned int oplockEnabled = 1; |
| 54 | unsigned int experimEnabled = 0; |
| 55 | unsigned int linuxExtEnabled = 1; |
| 56 | unsigned int lookupCacheEnabled = 1; |
| 57 | unsigned int multiuser_mount = 0; |
| 58 | unsigned int extended_security = 0; |
| 59 | unsigned int ntlmv2_support = 0; |
| 60 | unsigned int sign_CIFS_PDUs = 1; |
| 61 | extern struct task_struct * oplockThread; /* remove sparse warning */ |
| 62 | struct task_struct * oplockThread = NULL; |
Steve French | 8d0d509 | 2005-08-18 09:41:43 -0700 | [diff] [blame] | 63 | extern struct task_struct * dnotifyThread; /* remove sparse warning */ |
| 64 | struct task_struct * dnotifyThread = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | unsigned int CIFSMaxBufSize = CIFS_MAX_MSGSIZE; |
| 66 | module_param(CIFSMaxBufSize, int, 0); |
| 67 | MODULE_PARM_DESC(CIFSMaxBufSize,"Network buffer size (not including header). Default: 16384 Range: 8192 to 130048"); |
| 68 | unsigned int cifs_min_rcv = CIFS_MIN_RCV_POOL; |
| 69 | module_param(cifs_min_rcv, int, 0); |
| 70 | MODULE_PARM_DESC(cifs_min_rcv,"Network buffers in pool. Default: 4 Range: 1 to 64"); |
| 71 | unsigned int cifs_min_small = 30; |
| 72 | module_param(cifs_min_small, int, 0); |
| 73 | MODULE_PARM_DESC(cifs_min_small,"Small network buffers in pool. Default: 30 Range: 2 to 256"); |
| 74 | unsigned int cifs_max_pending = CIFS_MAX_REQ; |
| 75 | module_param(cifs_max_pending, int, 0); |
| 76 | MODULE_PARM_DESC(cifs_max_pending,"Simultaneous requests to server. Default: 50 Range: 2 to 256"); |
| 77 | |
| 78 | static DECLARE_COMPLETION(cifs_oplock_exited); |
Steve French | 8d0d509 | 2005-08-18 09:41:43 -0700 | [diff] [blame] | 79 | static DECLARE_COMPLETION(cifs_dnotify_exited); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | |
| 81 | extern mempool_t *cifs_sm_req_poolp; |
| 82 | extern mempool_t *cifs_req_poolp; |
| 83 | extern mempool_t *cifs_mid_poolp; |
| 84 | |
| 85 | extern kmem_cache_t *cifs_oplock_cachep; |
| 86 | |
| 87 | static int |
| 88 | cifs_read_super(struct super_block *sb, void *data, |
| 89 | const char *devname, int silent) |
| 90 | { |
| 91 | struct inode *inode; |
| 92 | struct cifs_sb_info *cifs_sb; |
| 93 | int rc = 0; |
| 94 | |
| 95 | sb->s_flags |= MS_NODIRATIME; /* and probably even noatime */ |
| 96 | sb->s_fs_info = kmalloc(sizeof(struct cifs_sb_info),GFP_KERNEL); |
| 97 | cifs_sb = CIFS_SB(sb); |
| 98 | if(cifs_sb == NULL) |
| 99 | return -ENOMEM; |
| 100 | else |
| 101 | memset(cifs_sb,0,sizeof(struct cifs_sb_info)); |
| 102 | |
| 103 | |
| 104 | rc = cifs_mount(sb, cifs_sb, data, devname); |
| 105 | |
| 106 | if (rc) { |
| 107 | if (!silent) |
| 108 | cERROR(1, |
| 109 | ("cifs_mount failed w/return code = %d", rc)); |
| 110 | goto out_mount_failed; |
| 111 | } |
| 112 | |
| 113 | sb->s_magic = CIFS_MAGIC_NUMBER; |
| 114 | sb->s_op = &cifs_super_ops; |
| 115 | /* if(cifs_sb->tcon->ses->server->maxBuf > MAX_CIFS_HDR_SIZE + 512) |
| 116 | sb->s_blocksize = cifs_sb->tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE; */ |
| 117 | #ifdef CONFIG_CIFS_QUOTA |
| 118 | sb->s_qcop = &cifs_quotactl_ops; |
| 119 | #endif |
| 120 | sb->s_blocksize = CIFS_MAX_MSGSIZE; |
| 121 | sb->s_blocksize_bits = 14; /* default 2**14 = CIFS_MAX_MSGSIZE */ |
| 122 | inode = iget(sb, ROOT_I); |
| 123 | |
| 124 | if (!inode) { |
| 125 | rc = -ENOMEM; |
| 126 | goto out_no_root; |
| 127 | } |
| 128 | |
| 129 | sb->s_root = d_alloc_root(inode); |
| 130 | |
| 131 | if (!sb->s_root) { |
| 132 | rc = -ENOMEM; |
| 133 | goto out_no_root; |
| 134 | } |
| 135 | |
| 136 | return 0; |
| 137 | |
| 138 | out_no_root: |
| 139 | cERROR(1, ("cifs_read_super: get root inode failed")); |
| 140 | if (inode) |
| 141 | iput(inode); |
| 142 | |
| 143 | out_mount_failed: |
| 144 | if(cifs_sb) { |
| 145 | if(cifs_sb->local_nls) |
| 146 | unload_nls(cifs_sb->local_nls); |
| 147 | kfree(cifs_sb); |
| 148 | } |
| 149 | return rc; |
| 150 | } |
| 151 | |
| 152 | static void |
| 153 | cifs_put_super(struct super_block *sb) |
| 154 | { |
| 155 | int rc = 0; |
| 156 | struct cifs_sb_info *cifs_sb; |
| 157 | |
| 158 | cFYI(1, ("In cifs_put_super")); |
| 159 | cifs_sb = CIFS_SB(sb); |
| 160 | if(cifs_sb == NULL) { |
| 161 | cFYI(1,("Empty cifs superblock info passed to unmount")); |
| 162 | return; |
| 163 | } |
| 164 | rc = cifs_umount(sb, cifs_sb); |
| 165 | if (rc) { |
| 166 | cERROR(1, ("cifs_umount failed with return code %d", rc)); |
| 167 | } |
| 168 | unload_nls(cifs_sb->local_nls); |
| 169 | kfree(cifs_sb); |
| 170 | return; |
| 171 | } |
| 172 | |
| 173 | static int |
| 174 | cifs_statfs(struct super_block *sb, struct kstatfs *buf) |
| 175 | { |
Steve French | c81156d | 2005-04-28 22:41:07 -0700 | [diff] [blame] | 176 | int xid; |
| 177 | int rc = -EOPNOTSUPP; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | struct cifs_sb_info *cifs_sb; |
| 179 | struct cifsTconInfo *pTcon; |
| 180 | |
| 181 | xid = GetXid(); |
| 182 | |
| 183 | cifs_sb = CIFS_SB(sb); |
| 184 | pTcon = cifs_sb->tcon; |
| 185 | |
| 186 | buf->f_type = CIFS_MAGIC_NUMBER; |
| 187 | |
| 188 | /* instead could get the real value via SMB_QUERY_FS_ATTRIBUTE_INFO */ |
Steve French | c81156d | 2005-04-28 22:41:07 -0700 | [diff] [blame] | 189 | buf->f_namelen = PATH_MAX; /* PATH_MAX may be too long - it would |
| 190 | presumably be total path, but note |
| 191 | that some servers (includinng Samba 3) |
| 192 | have a shorter maximum path */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | buf->f_files = 0; /* undefined */ |
| 194 | buf->f_ffree = 0; /* unlimited */ |
| 195 | |
| 196 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
| 197 | /* BB we could add a second check for a QFS Unix capability bit */ |
Steve French | f28ac91 | 2005-04-28 22:41:07 -0700 | [diff] [blame] | 198 | /* BB FIXME check CIFS_POSIX_EXTENSIONS Unix cap first FIXME BB */ |
Steve French | c81156d | 2005-04-28 22:41:07 -0700 | [diff] [blame] | 199 | if ((pTcon->ses->capabilities & CAP_UNIX) && (CIFS_POSIX_EXTENSIONS & |
| 200 | le64_to_cpu(pTcon->fsUnixInfo.Capability))) |
Steve French | 737b758 | 2005-04-28 22:41:06 -0700 | [diff] [blame] | 201 | rc = CIFSSMBQFSPosixInfo(xid, pTcon, buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | |
| 203 | /* Only need to call the old QFSInfo if failed |
| 204 | on newer one */ |
| 205 | if(rc) |
| 206 | #endif /* CIFS_EXPERIMENTAL */ |
Steve French | 737b758 | 2005-04-28 22:41:06 -0700 | [diff] [blame] | 207 | rc = CIFSSMBQFSInfo(xid, pTcon, buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | |
Steve French | 2096243 | 2005-09-21 22:05:57 -0700 | [diff] [blame] | 209 | /* Old Windows servers do not support level 103, retry with level |
| 210 | one if old server failed the previous call */ |
| 211 | if(rc) |
| 212 | rc = SMBOldQFSInfo(xid, pTcon, buf); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | /* |
| 214 | int f_type; |
| 215 | __fsid_t f_fsid; |
| 216 | int f_namelen; */ |
Steve French | c81156d | 2005-04-28 22:41:07 -0700 | [diff] [blame] | 217 | /* BB get from info in tcon struct at mount time call to QFSAttrInfo */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | FreeXid(xid); |
Steve French | c81156d | 2005-04-28 22:41:07 -0700 | [diff] [blame] | 219 | return 0; /* always return success? what if volume is no |
| 220 | longer available? */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | } |
| 222 | |
| 223 | static int cifs_permission(struct inode * inode, int mask, struct nameidata *nd) |
| 224 | { |
| 225 | struct cifs_sb_info *cifs_sb; |
| 226 | |
| 227 | cifs_sb = CIFS_SB(inode->i_sb); |
| 228 | |
| 229 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_PERM) { |
| 230 | return 0; |
| 231 | } else /* file mode might have been restricted at mount time |
| 232 | on the client (above and beyond ACL on servers) for |
| 233 | servers which do not support setting and viewing mode bits, |
| 234 | so allowing client to check permissions is useful */ |
| 235 | return generic_permission(inode, mask, NULL); |
| 236 | } |
| 237 | |
| 238 | static kmem_cache_t *cifs_inode_cachep; |
| 239 | static kmem_cache_t *cifs_req_cachep; |
| 240 | static kmem_cache_t *cifs_mid_cachep; |
| 241 | kmem_cache_t *cifs_oplock_cachep; |
| 242 | static kmem_cache_t *cifs_sm_req_cachep; |
| 243 | mempool_t *cifs_sm_req_poolp; |
| 244 | mempool_t *cifs_req_poolp; |
| 245 | mempool_t *cifs_mid_poolp; |
| 246 | |
| 247 | static struct inode * |
| 248 | cifs_alloc_inode(struct super_block *sb) |
| 249 | { |
| 250 | struct cifsInodeInfo *cifs_inode; |
| 251 | cifs_inode = kmem_cache_alloc(cifs_inode_cachep, SLAB_KERNEL); |
| 252 | if (!cifs_inode) |
| 253 | return NULL; |
| 254 | cifs_inode->cifsAttrs = 0x20; /* default */ |
| 255 | atomic_set(&cifs_inode->inUse, 0); |
| 256 | cifs_inode->time = 0; |
| 257 | /* Until the file is open and we have gotten oplock |
| 258 | info back from the server, can not assume caching of |
| 259 | file data or metadata */ |
| 260 | cifs_inode->clientCanCacheRead = FALSE; |
| 261 | cifs_inode->clientCanCacheAll = FALSE; |
| 262 | cifs_inode->vfs_inode.i_blksize = CIFS_MAX_MSGSIZE; |
| 263 | cifs_inode->vfs_inode.i_blkbits = 14; /* 2**14 = CIFS_MAX_MSGSIZE */ |
Steve French | e30dcf3 | 2005-09-20 20:49:16 -0700 | [diff] [blame] | 264 | cifs_inode->vfs_inode.i_flags = S_NOATIME | S_NOCMTIME; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | INIT_LIST_HEAD(&cifs_inode->openFileList); |
| 266 | return &cifs_inode->vfs_inode; |
| 267 | } |
| 268 | |
| 269 | static void |
| 270 | cifs_destroy_inode(struct inode *inode) |
| 271 | { |
| 272 | kmem_cache_free(cifs_inode_cachep, CIFS_I(inode)); |
| 273 | } |
| 274 | |
| 275 | /* |
| 276 | * cifs_show_options() is for displaying mount options in /proc/mounts. |
| 277 | * Not all settable options are displayed but most of the important |
| 278 | * ones are. |
| 279 | */ |
| 280 | static int |
| 281 | cifs_show_options(struct seq_file *s, struct vfsmount *m) |
| 282 | { |
| 283 | struct cifs_sb_info *cifs_sb; |
| 284 | |
| 285 | cifs_sb = CIFS_SB(m->mnt_sb); |
| 286 | |
| 287 | if (cifs_sb) { |
| 288 | if (cifs_sb->tcon) { |
| 289 | seq_printf(s, ",unc=%s", cifs_sb->tcon->treeName); |
| 290 | if (cifs_sb->tcon->ses) { |
| 291 | if (cifs_sb->tcon->ses->userName) |
| 292 | seq_printf(s, ",username=%s", |
| 293 | cifs_sb->tcon->ses->userName); |
| 294 | if(cifs_sb->tcon->ses->domainName) |
| 295 | seq_printf(s, ",domain=%s", |
| 296 | cifs_sb->tcon->ses->domainName); |
| 297 | } |
| 298 | } |
| 299 | seq_printf(s, ",rsize=%d",cifs_sb->rsize); |
| 300 | seq_printf(s, ",wsize=%d",cifs_sb->wsize); |
| 301 | } |
| 302 | return 0; |
| 303 | } |
| 304 | |
| 305 | #ifdef CONFIG_CIFS_QUOTA |
| 306 | int cifs_xquota_set(struct super_block * sb, int quota_type, qid_t qid, |
| 307 | struct fs_disk_quota * pdquota) |
| 308 | { |
| 309 | int xid; |
| 310 | int rc = 0; |
| 311 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
| 312 | struct cifsTconInfo *pTcon; |
| 313 | |
| 314 | if(cifs_sb) |
| 315 | pTcon = cifs_sb->tcon; |
| 316 | else |
| 317 | return -EIO; |
| 318 | |
| 319 | |
| 320 | xid = GetXid(); |
| 321 | if(pTcon) { |
| 322 | cFYI(1,("set type: 0x%x id: %d",quota_type,qid)); |
| 323 | } else { |
| 324 | return -EIO; |
| 325 | } |
| 326 | |
| 327 | FreeXid(xid); |
| 328 | return rc; |
| 329 | } |
| 330 | |
| 331 | int cifs_xquota_get(struct super_block * sb, int quota_type, qid_t qid, |
| 332 | struct fs_disk_quota * pdquota) |
| 333 | { |
| 334 | int xid; |
| 335 | int rc = 0; |
| 336 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
| 337 | struct cifsTconInfo *pTcon; |
| 338 | |
| 339 | if(cifs_sb) |
| 340 | pTcon = cifs_sb->tcon; |
| 341 | else |
| 342 | return -EIO; |
| 343 | |
| 344 | xid = GetXid(); |
| 345 | if(pTcon) { |
| 346 | cFYI(1,("set type: 0x%x id: %d",quota_type,qid)); |
| 347 | } else { |
| 348 | rc = -EIO; |
| 349 | } |
| 350 | |
| 351 | FreeXid(xid); |
| 352 | return rc; |
| 353 | } |
| 354 | |
| 355 | int cifs_xstate_set(struct super_block * sb, unsigned int flags, int operation) |
| 356 | { |
| 357 | int xid; |
| 358 | int rc = 0; |
| 359 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
| 360 | struct cifsTconInfo *pTcon; |
| 361 | |
| 362 | if(cifs_sb) |
| 363 | pTcon = cifs_sb->tcon; |
| 364 | else |
| 365 | return -EIO; |
| 366 | |
| 367 | xid = GetXid(); |
| 368 | if(pTcon) { |
| 369 | cFYI(1,("flags: 0x%x operation: 0x%x",flags,operation)); |
| 370 | } else { |
| 371 | rc = -EIO; |
| 372 | } |
| 373 | |
| 374 | FreeXid(xid); |
| 375 | return rc; |
| 376 | } |
| 377 | |
| 378 | int cifs_xstate_get(struct super_block * sb, struct fs_quota_stat *qstats) |
| 379 | { |
| 380 | int xid; |
| 381 | int rc = 0; |
| 382 | struct cifs_sb_info *cifs_sb = CIFS_SB(sb); |
| 383 | struct cifsTconInfo *pTcon; |
| 384 | |
| 385 | if(cifs_sb) { |
| 386 | pTcon = cifs_sb->tcon; |
| 387 | } else { |
| 388 | return -EIO; |
| 389 | } |
| 390 | xid = GetXid(); |
| 391 | if(pTcon) { |
| 392 | cFYI(1,("pqstats %p",qstats)); |
| 393 | } else { |
| 394 | rc = -EIO; |
| 395 | } |
| 396 | |
| 397 | FreeXid(xid); |
| 398 | return rc; |
| 399 | } |
| 400 | |
| 401 | static struct quotactl_ops cifs_quotactl_ops = { |
| 402 | .set_xquota = cifs_xquota_set, |
| 403 | .get_xquota = cifs_xquota_set, |
| 404 | .set_xstate = cifs_xstate_set, |
| 405 | .get_xstate = cifs_xstate_get, |
| 406 | }; |
| 407 | #endif |
| 408 | |
Steve French | 7b7abfe | 2005-11-09 15:21:09 -0800 | [diff] [blame] | 409 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
Steve French | 68058e7 | 2005-10-10 10:34:22 -0700 | [diff] [blame] | 410 | static void cifs_umount_begin(struct super_block * sblock) |
| 411 | { |
Steve French | 5e1253b | 2005-10-10 14:06:37 -0700 | [diff] [blame] | 412 | struct cifs_sb_info *cifs_sb; |
Steve French | 9e2e85f | 2005-10-10 14:28:38 -0700 | [diff] [blame] | 413 | struct cifsTconInfo * tcon; |
Steve French | 68058e7 | 2005-10-10 10:34:22 -0700 | [diff] [blame] | 414 | |
Steve French | 34210f3 | 2005-10-10 14:31:13 -0700 | [diff] [blame] | 415 | cifs_sb = CIFS_SB(sblock); |
Steve French | 5e1253b | 2005-10-10 14:06:37 -0700 | [diff] [blame] | 416 | if(cifs_sb == NULL) |
Steve French | 9e2e85f | 2005-10-10 14:28:38 -0700 | [diff] [blame] | 417 | return; |
| 418 | |
| 419 | tcon = cifs_sb->tcon; |
| 420 | if(tcon == NULL) |
| 421 | return; |
Steve French | 5e1253b | 2005-10-10 14:06:37 -0700 | [diff] [blame] | 422 | down(&tcon->tconSem); |
| 423 | if (atomic_read(&tcon->useCount) == 1) |
| 424 | tcon->tidStatus = CifsExiting; |
| 425 | up(&tcon->tconSem); |
| 426 | |
Steve French | 7b7abfe | 2005-11-09 15:21:09 -0800 | [diff] [blame] | 427 | /* cancel_brl_requests(tcon); */ |
| 428 | /* cancel_notify_requests(tcon); */ |
Steve French | 9e2e85f | 2005-10-10 14:28:38 -0700 | [diff] [blame] | 429 | if(tcon->ses && tcon->ses->server) |
Steve French | 5e1253b | 2005-10-10 14:06:37 -0700 | [diff] [blame] | 430 | { |
Steve French | 7b7abfe | 2005-11-09 15:21:09 -0800 | [diff] [blame] | 431 | cFYI(1,("wake up tasks now - umount begin not complete")); |
Steve French | 9e2e85f | 2005-10-10 14:28:38 -0700 | [diff] [blame] | 432 | wake_up_all(&tcon->ses->server->request_q); |
Steve French | 6ab16d2 | 2005-11-29 20:55:11 -0800 | [diff] [blame] | 433 | wake_up_all(&tcon->ses->server->response_q); |
| 434 | msleep(1); /* yield */ |
| 435 | /* we have to kick the requests once more */ |
| 436 | wake_up_all(&tcon->ses->server->response_q); |
| 437 | msleep(1); |
Steve French | 5e1253b | 2005-10-10 14:06:37 -0700 | [diff] [blame] | 438 | } |
| 439 | /* BB FIXME - finish add checks for tidStatus BB */ |
Steve French | 68058e7 | 2005-10-10 10:34:22 -0700 | [diff] [blame] | 440 | |
| 441 | return; |
| 442 | } |
Steve French | 7b7abfe | 2005-11-09 15:21:09 -0800 | [diff] [blame] | 443 | #endif |
Steve French | 68058e7 | 2005-10-10 10:34:22 -0700 | [diff] [blame] | 444 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 445 | static int cifs_remount(struct super_block *sb, int *flags, char *data) |
| 446 | { |
| 447 | *flags |= MS_NODIRATIME; |
| 448 | return 0; |
| 449 | } |
| 450 | |
| 451 | struct super_operations cifs_super_ops = { |
| 452 | .read_inode = cifs_read_inode, |
| 453 | .put_super = cifs_put_super, |
| 454 | .statfs = cifs_statfs, |
| 455 | .alloc_inode = cifs_alloc_inode, |
| 456 | .destroy_inode = cifs_destroy_inode, |
| 457 | /* .drop_inode = generic_delete_inode, |
| 458 | .delete_inode = cifs_delete_inode, *//* Do not need the above two functions |
| 459 | unless later we add lazy close of inodes or unless the kernel forgets to call |
| 460 | us with the same number of releases (closes) as opens */ |
| 461 | .show_options = cifs_show_options, |
Steve French | 7b7abfe | 2005-11-09 15:21:09 -0800 | [diff] [blame] | 462 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
| 463 | .umount_begin = cifs_umount_begin, |
| 464 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | .remount_fs = cifs_remount, |
| 466 | }; |
| 467 | |
| 468 | static struct super_block * |
| 469 | cifs_get_sb(struct file_system_type *fs_type, |
| 470 | int flags, const char *dev_name, void *data) |
| 471 | { |
| 472 | int rc; |
| 473 | struct super_block *sb = sget(fs_type, NULL, set_anon_super, NULL); |
| 474 | |
| 475 | cFYI(1, ("Devname: %s flags: %d ", dev_name, flags)); |
| 476 | |
| 477 | if (IS_ERR(sb)) |
| 478 | return sb; |
| 479 | |
| 480 | sb->s_flags = flags; |
| 481 | |
| 482 | rc = cifs_read_super(sb, data, dev_name, flags & MS_VERBOSE ? 1 : 0); |
| 483 | if (rc) { |
| 484 | up_write(&sb->s_umount); |
| 485 | deactivate_super(sb); |
| 486 | return ERR_PTR(rc); |
| 487 | } |
| 488 | sb->s_flags |= MS_ACTIVE; |
| 489 | return sb; |
| 490 | } |
| 491 | |
Steve French | 87c89dd | 2005-11-17 17:03:00 -0800 | [diff] [blame] | 492 | static ssize_t cifs_file_writev(struct file *file, const struct iovec *iov, |
| 493 | unsigned long nr_segs, loff_t *ppos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | { |
Steve French | 87c89dd | 2005-11-17 17:03:00 -0800 | [diff] [blame] | 495 | struct inode *inode = file->f_dentry->d_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | ssize_t written; |
| 497 | |
Steve French | 87c89dd | 2005-11-17 17:03:00 -0800 | [diff] [blame] | 498 | written = generic_file_writev(file, iov, nr_segs, ppos); |
| 499 | if (!CIFS_I(inode)->clientCanCacheAll) |
| 500 | filemap_fdatawrite(inode->i_mapping); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 501 | return written; |
| 502 | } |
| 503 | |
Steve French | 87c89dd | 2005-11-17 17:03:00 -0800 | [diff] [blame] | 504 | static ssize_t cifs_file_aio_write(struct kiocb *iocb, const char __user *buf, |
| 505 | size_t count, loff_t pos) |
| 506 | { |
| 507 | struct inode *inode = iocb->ki_filp->f_dentry->d_inode; |
| 508 | ssize_t written; |
| 509 | |
| 510 | written = generic_file_aio_write(iocb, buf, count, pos); |
| 511 | if (!CIFS_I(inode)->clientCanCacheAll) |
| 512 | filemap_fdatawrite(inode->i_mapping); |
| 513 | return written; |
| 514 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | |
| 516 | static struct file_system_type cifs_fs_type = { |
| 517 | .owner = THIS_MODULE, |
| 518 | .name = "cifs", |
| 519 | .get_sb = cifs_get_sb, |
| 520 | .kill_sb = kill_anon_super, |
| 521 | /* .fs_flags */ |
| 522 | }; |
| 523 | struct inode_operations cifs_dir_inode_ops = { |
| 524 | .create = cifs_create, |
| 525 | .lookup = cifs_lookup, |
| 526 | .getattr = cifs_getattr, |
| 527 | .unlink = cifs_unlink, |
| 528 | .link = cifs_hardlink, |
| 529 | .mkdir = cifs_mkdir, |
| 530 | .rmdir = cifs_rmdir, |
| 531 | .rename = cifs_rename, |
| 532 | .permission = cifs_permission, |
| 533 | /* revalidate:cifs_revalidate, */ |
| 534 | .setattr = cifs_setattr, |
| 535 | .symlink = cifs_symlink, |
| 536 | .mknod = cifs_mknod, |
| 537 | #ifdef CONFIG_CIFS_XATTR |
| 538 | .setxattr = cifs_setxattr, |
| 539 | .getxattr = cifs_getxattr, |
| 540 | .listxattr = cifs_listxattr, |
| 541 | .removexattr = cifs_removexattr, |
| 542 | #endif |
| 543 | }; |
| 544 | |
| 545 | struct inode_operations cifs_file_inode_ops = { |
| 546 | /* revalidate:cifs_revalidate, */ |
| 547 | .setattr = cifs_setattr, |
| 548 | .getattr = cifs_getattr, /* do we need this anymore? */ |
| 549 | .rename = cifs_rename, |
| 550 | .permission = cifs_permission, |
| 551 | #ifdef CONFIG_CIFS_XATTR |
| 552 | .setxattr = cifs_setxattr, |
| 553 | .getxattr = cifs_getxattr, |
| 554 | .listxattr = cifs_listxattr, |
| 555 | .removexattr = cifs_removexattr, |
| 556 | #endif |
| 557 | }; |
| 558 | |
| 559 | struct inode_operations cifs_symlink_inode_ops = { |
| 560 | .readlink = generic_readlink, |
| 561 | .follow_link = cifs_follow_link, |
| 562 | .put_link = cifs_put_link, |
| 563 | .permission = cifs_permission, |
| 564 | /* BB add the following two eventually */ |
| 565 | /* revalidate: cifs_revalidate, |
| 566 | setattr: cifs_notify_change, *//* BB do we need notify change */ |
| 567 | #ifdef CONFIG_CIFS_XATTR |
| 568 | .setxattr = cifs_setxattr, |
| 569 | .getxattr = cifs_getxattr, |
| 570 | .listxattr = cifs_listxattr, |
| 571 | .removexattr = cifs_removexattr, |
| 572 | #endif |
| 573 | }; |
| 574 | |
| 575 | struct file_operations cifs_file_ops = { |
Steve French | 87c89dd | 2005-11-17 17:03:00 -0800 | [diff] [blame] | 576 | .read = do_sync_read, |
| 577 | .write = do_sync_write, |
| 578 | .readv = generic_file_readv, |
| 579 | .writev = cifs_file_writev, |
| 580 | .aio_read = generic_file_aio_read, |
| 581 | .aio_write = cifs_file_aio_write, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | .open = cifs_open, |
| 583 | .release = cifs_close, |
| 584 | .lock = cifs_lock, |
| 585 | .fsync = cifs_fsync, |
| 586 | .flush = cifs_flush, |
| 587 | .mmap = cifs_file_mmap, |
| 588 | .sendfile = generic_file_sendfile, |
Steve French | c67593a | 2005-04-28 22:41:04 -0700 | [diff] [blame] | 589 | #ifdef CONFIG_CIFS_POSIX |
| 590 | .ioctl = cifs_ioctl, |
| 591 | #endif /* CONFIG_CIFS_POSIX */ |
| 592 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 594 | .dir_notify = cifs_dir_notify, |
| 595 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ |
| 596 | }; |
| 597 | |
| 598 | struct file_operations cifs_file_direct_ops = { |
| 599 | /* no mmap, no aio, no readv - |
| 600 | BB reevaluate whether they can be done with directio, no cache */ |
| 601 | .read = cifs_user_read, |
| 602 | .write = cifs_user_write, |
| 603 | .open = cifs_open, |
| 604 | .release = cifs_close, |
| 605 | .lock = cifs_lock, |
| 606 | .fsync = cifs_fsync, |
| 607 | .flush = cifs_flush, |
| 608 | .sendfile = generic_file_sendfile, /* BB removeme BB */ |
Steve French | c67593a | 2005-04-28 22:41:04 -0700 | [diff] [blame] | 609 | #ifdef CONFIG_CIFS_POSIX |
| 610 | .ioctl = cifs_ioctl, |
| 611 | #endif /* CONFIG_CIFS_POSIX */ |
| 612 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
| 614 | .dir_notify = cifs_dir_notify, |
| 615 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ |
| 616 | }; |
Steve French | 8b94bcb | 2005-11-11 11:41:00 -0800 | [diff] [blame] | 617 | struct file_operations cifs_file_nobrl_ops = { |
Steve French | 87c89dd | 2005-11-17 17:03:00 -0800 | [diff] [blame] | 618 | .read = do_sync_read, |
| 619 | .write = do_sync_write, |
| 620 | .readv = generic_file_readv, |
| 621 | .writev = cifs_file_writev, |
| 622 | .aio_read = generic_file_aio_read, |
| 623 | .aio_write = cifs_file_aio_write, |
| 624 | .open = cifs_open, |
| 625 | .release = cifs_close, |
| 626 | .fsync = cifs_fsync, |
| 627 | .flush = cifs_flush, |
| 628 | .mmap = cifs_file_mmap, |
| 629 | .sendfile = generic_file_sendfile, |
Steve French | 8b94bcb | 2005-11-11 11:41:00 -0800 | [diff] [blame] | 630 | #ifdef CONFIG_CIFS_POSIX |
Steve French | 87c89dd | 2005-11-17 17:03:00 -0800 | [diff] [blame] | 631 | .ioctl = cifs_ioctl, |
Steve French | 8b94bcb | 2005-11-11 11:41:00 -0800 | [diff] [blame] | 632 | #endif /* CONFIG_CIFS_POSIX */ |
| 633 | |
| 634 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
Steve French | 87c89dd | 2005-11-17 17:03:00 -0800 | [diff] [blame] | 635 | .dir_notify = cifs_dir_notify, |
Steve French | 8b94bcb | 2005-11-11 11:41:00 -0800 | [diff] [blame] | 636 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ |
| 637 | }; |
| 638 | |
| 639 | struct file_operations cifs_file_direct_nobrl_ops = { |
Steve French | 87c89dd | 2005-11-17 17:03:00 -0800 | [diff] [blame] | 640 | /* no mmap, no aio, no readv - |
| 641 | BB reevaluate whether they can be done with directio, no cache */ |
| 642 | .read = cifs_user_read, |
| 643 | .write = cifs_user_write, |
| 644 | .open = cifs_open, |
| 645 | .release = cifs_close, |
| 646 | .fsync = cifs_fsync, |
| 647 | .flush = cifs_flush, |
| 648 | .sendfile = generic_file_sendfile, /* BB removeme BB */ |
Steve French | 8b94bcb | 2005-11-11 11:41:00 -0800 | [diff] [blame] | 649 | #ifdef CONFIG_CIFS_POSIX |
Steve French | 87c89dd | 2005-11-17 17:03:00 -0800 | [diff] [blame] | 650 | .ioctl = cifs_ioctl, |
Steve French | 8b94bcb | 2005-11-11 11:41:00 -0800 | [diff] [blame] | 651 | #endif /* CONFIG_CIFS_POSIX */ |
| 652 | |
| 653 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
Steve French | 87c89dd | 2005-11-17 17:03:00 -0800 | [diff] [blame] | 654 | .dir_notify = cifs_dir_notify, |
Steve French | 8b94bcb | 2005-11-11 11:41:00 -0800 | [diff] [blame] | 655 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ |
| 656 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 657 | |
| 658 | struct file_operations cifs_dir_ops = { |
| 659 | .readdir = cifs_readdir, |
| 660 | .release = cifs_closedir, |
| 661 | .read = generic_read_dir, |
| 662 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
| 663 | .dir_notify = cifs_dir_notify, |
| 664 | #endif /* CONFIG_CIFS_EXPERIMENTAL */ |
Steve French | f28ac91 | 2005-04-28 22:41:07 -0700 | [diff] [blame] | 665 | .ioctl = cifs_ioctl, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | }; |
| 667 | |
| 668 | static void |
| 669 | cifs_init_once(void *inode, kmem_cache_t * cachep, unsigned long flags) |
| 670 | { |
| 671 | struct cifsInodeInfo *cifsi = inode; |
| 672 | |
| 673 | if ((flags & (SLAB_CTOR_VERIFY | SLAB_CTOR_CONSTRUCTOR)) == |
| 674 | SLAB_CTOR_CONSTRUCTOR) { |
| 675 | inode_init_once(&cifsi->vfs_inode); |
| 676 | INIT_LIST_HEAD(&cifsi->lockList); |
| 677 | } |
| 678 | } |
| 679 | |
| 680 | static int |
| 681 | cifs_init_inodecache(void) |
| 682 | { |
| 683 | cifs_inode_cachep = kmem_cache_create("cifs_inode_cache", |
| 684 | sizeof (struct cifsInodeInfo), |
| 685 | 0, SLAB_RECLAIM_ACCOUNT, |
| 686 | cifs_init_once, NULL); |
| 687 | if (cifs_inode_cachep == NULL) |
| 688 | return -ENOMEM; |
| 689 | |
| 690 | return 0; |
| 691 | } |
| 692 | |
| 693 | static void |
| 694 | cifs_destroy_inodecache(void) |
| 695 | { |
| 696 | if (kmem_cache_destroy(cifs_inode_cachep)) |
| 697 | printk(KERN_WARNING "cifs_inode_cache: error freeing\n"); |
| 698 | } |
| 699 | |
| 700 | static int |
| 701 | cifs_init_request_bufs(void) |
| 702 | { |
| 703 | if(CIFSMaxBufSize < 8192) { |
| 704 | /* Buffer size can not be smaller than 2 * PATH_MAX since maximum |
| 705 | Unicode path name has to fit in any SMB/CIFS path based frames */ |
| 706 | CIFSMaxBufSize = 8192; |
| 707 | } else if (CIFSMaxBufSize > 1024*127) { |
| 708 | CIFSMaxBufSize = 1024 * 127; |
| 709 | } else { |
| 710 | CIFSMaxBufSize &= 0x1FE00; /* Round size to even 512 byte mult*/ |
| 711 | } |
| 712 | /* cERROR(1,("CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize)); */ |
| 713 | cifs_req_cachep = kmem_cache_create("cifs_request", |
| 714 | CIFSMaxBufSize + |
| 715 | MAX_CIFS_HDR_SIZE, 0, |
| 716 | SLAB_HWCACHE_ALIGN, NULL, NULL); |
| 717 | if (cifs_req_cachep == NULL) |
| 718 | return -ENOMEM; |
| 719 | |
| 720 | if(cifs_min_rcv < 1) |
| 721 | cifs_min_rcv = 1; |
| 722 | else if (cifs_min_rcv > 64) { |
| 723 | cifs_min_rcv = 64; |
| 724 | cERROR(1,("cifs_min_rcv set to maximum (64)")); |
| 725 | } |
| 726 | |
| 727 | cifs_req_poolp = mempool_create(cifs_min_rcv, |
| 728 | mempool_alloc_slab, |
| 729 | mempool_free_slab, |
| 730 | cifs_req_cachep); |
| 731 | |
| 732 | if(cifs_req_poolp == NULL) { |
| 733 | kmem_cache_destroy(cifs_req_cachep); |
| 734 | return -ENOMEM; |
| 735 | } |
| 736 | /* 256 (MAX_CIFS_HDR_SIZE bytes is enough for most SMB responses and |
| 737 | almost all handle based requests (but not write response, nor is it |
| 738 | sufficient for path based requests). A smaller size would have |
| 739 | been more efficient (compacting multiple slab items on one 4k page) |
| 740 | for the case in which debug was on, but this larger size allows |
| 741 | more SMBs to use small buffer alloc and is still much more |
| 742 | efficient to alloc 1 per page off the slab compared to 17K (5page) |
| 743 | alloc of large cifs buffers even when page debugging is on */ |
| 744 | cifs_sm_req_cachep = kmem_cache_create("cifs_small_rq", |
| 745 | MAX_CIFS_HDR_SIZE, 0, SLAB_HWCACHE_ALIGN, NULL, NULL); |
| 746 | if (cifs_sm_req_cachep == NULL) { |
| 747 | mempool_destroy(cifs_req_poolp); |
| 748 | kmem_cache_destroy(cifs_req_cachep); |
| 749 | return -ENOMEM; |
| 750 | } |
| 751 | |
| 752 | if(cifs_min_small < 2) |
| 753 | cifs_min_small = 2; |
| 754 | else if (cifs_min_small > 256) { |
| 755 | cifs_min_small = 256; |
| 756 | cFYI(1,("cifs_min_small set to maximum (256)")); |
| 757 | } |
| 758 | |
| 759 | cifs_sm_req_poolp = mempool_create(cifs_min_small, |
| 760 | mempool_alloc_slab, |
| 761 | mempool_free_slab, |
| 762 | cifs_sm_req_cachep); |
| 763 | |
| 764 | if(cifs_sm_req_poolp == NULL) { |
| 765 | mempool_destroy(cifs_req_poolp); |
| 766 | kmem_cache_destroy(cifs_req_cachep); |
| 767 | kmem_cache_destroy(cifs_sm_req_cachep); |
| 768 | return -ENOMEM; |
| 769 | } |
| 770 | |
| 771 | return 0; |
| 772 | } |
| 773 | |
| 774 | static void |
| 775 | cifs_destroy_request_bufs(void) |
| 776 | { |
| 777 | mempool_destroy(cifs_req_poolp); |
| 778 | if (kmem_cache_destroy(cifs_req_cachep)) |
| 779 | printk(KERN_WARNING |
| 780 | "cifs_destroy_request_cache: error not all structures were freed\n"); |
| 781 | mempool_destroy(cifs_sm_req_poolp); |
| 782 | if (kmem_cache_destroy(cifs_sm_req_cachep)) |
| 783 | printk(KERN_WARNING |
| 784 | "cifs_destroy_request_cache: cifs_small_rq free error\n"); |
| 785 | } |
| 786 | |
| 787 | static int |
| 788 | cifs_init_mids(void) |
| 789 | { |
| 790 | cifs_mid_cachep = kmem_cache_create("cifs_mpx_ids", |
| 791 | sizeof (struct mid_q_entry), 0, |
| 792 | SLAB_HWCACHE_ALIGN, NULL, NULL); |
| 793 | if (cifs_mid_cachep == NULL) |
| 794 | return -ENOMEM; |
| 795 | |
| 796 | cifs_mid_poolp = mempool_create(3 /* a reasonable min simultan opers */, |
| 797 | mempool_alloc_slab, |
| 798 | mempool_free_slab, |
| 799 | cifs_mid_cachep); |
| 800 | if(cifs_mid_poolp == NULL) { |
| 801 | kmem_cache_destroy(cifs_mid_cachep); |
| 802 | return -ENOMEM; |
| 803 | } |
| 804 | |
| 805 | cifs_oplock_cachep = kmem_cache_create("cifs_oplock_structs", |
| 806 | sizeof (struct oplock_q_entry), 0, |
| 807 | SLAB_HWCACHE_ALIGN, NULL, NULL); |
| 808 | if (cifs_oplock_cachep == NULL) { |
| 809 | kmem_cache_destroy(cifs_mid_cachep); |
| 810 | mempool_destroy(cifs_mid_poolp); |
| 811 | return -ENOMEM; |
| 812 | } |
| 813 | |
| 814 | return 0; |
| 815 | } |
| 816 | |
| 817 | static void |
| 818 | cifs_destroy_mids(void) |
| 819 | { |
| 820 | mempool_destroy(cifs_mid_poolp); |
| 821 | if (kmem_cache_destroy(cifs_mid_cachep)) |
| 822 | printk(KERN_WARNING |
| 823 | "cifs_destroy_mids: error not all structures were freed\n"); |
| 824 | |
| 825 | if (kmem_cache_destroy(cifs_oplock_cachep)) |
| 826 | printk(KERN_WARNING |
| 827 | "error not all oplock structures were freed\n"); |
| 828 | } |
| 829 | |
| 830 | static int cifs_oplock_thread(void * dummyarg) |
| 831 | { |
| 832 | struct oplock_q_entry * oplock_item; |
| 833 | struct cifsTconInfo *pTcon; |
| 834 | struct inode * inode; |
| 835 | __u16 netfid; |
| 836 | int rc; |
| 837 | |
| 838 | daemonize("cifsoplockd"); |
| 839 | allow_signal(SIGTERM); |
| 840 | |
| 841 | oplockThread = current; |
| 842 | do { |
Steve French | ede1327 | 2005-08-30 20:10:14 -0700 | [diff] [blame] | 843 | if (try_to_freeze()) |
| 844 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 845 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 846 | spin_lock(&GlobalMid_Lock); |
| 847 | if(list_empty(&GlobalOplock_Q)) { |
| 848 | spin_unlock(&GlobalMid_Lock); |
| 849 | set_current_state(TASK_INTERRUPTIBLE); |
| 850 | schedule_timeout(39*HZ); |
| 851 | } else { |
| 852 | oplock_item = list_entry(GlobalOplock_Q.next, |
| 853 | struct oplock_q_entry, qhead); |
| 854 | if(oplock_item) { |
| 855 | cFYI(1,("found oplock item to write out")); |
| 856 | pTcon = oplock_item->tcon; |
| 857 | inode = oplock_item->pinode; |
| 858 | netfid = oplock_item->netfid; |
| 859 | spin_unlock(&GlobalMid_Lock); |
| 860 | DeleteOplockQEntry(oplock_item); |
| 861 | /* can not grab inode sem here since it would |
| 862 | deadlock when oplock received on delete |
Jes Sorensen | 1b1dcc1 | 2006-01-09 15:59:24 -0800 | [diff] [blame] | 863 | since vfs_unlink holds the i_mutex across |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 864 | the call */ |
Jes Sorensen | 1b1dcc1 | 2006-01-09 15:59:24 -0800 | [diff] [blame] | 865 | /* mutex_lock(&inode->i_mutex);*/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 866 | if (S_ISREG(inode->i_mode)) { |
| 867 | rc = filemap_fdatawrite(inode->i_mapping); |
| 868 | if(CIFS_I(inode)->clientCanCacheRead == 0) { |
| 869 | filemap_fdatawait(inode->i_mapping); |
| 870 | invalidate_remote_inode(inode); |
| 871 | } |
| 872 | } else |
| 873 | rc = 0; |
Jes Sorensen | 1b1dcc1 | 2006-01-09 15:59:24 -0800 | [diff] [blame] | 874 | /* mutex_unlock(&inode->i_mutex);*/ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 875 | if (rc) |
| 876 | CIFS_I(inode)->write_behind_rc = rc; |
| 877 | cFYI(1,("Oplock flush inode %p rc %d",inode,rc)); |
| 878 | |
| 879 | /* releasing a stale oplock after recent reconnection |
| 880 | of smb session using a now incorrect file |
| 881 | handle is not a data integrity issue but do |
| 882 | not bother sending an oplock release if session |
| 883 | to server still is disconnected since oplock |
| 884 | already released by the server in that case */ |
| 885 | if(pTcon->tidStatus != CifsNeedReconnect) { |
| 886 | rc = CIFSSMBLock(0, pTcon, netfid, |
| 887 | 0 /* len */ , 0 /* offset */, 0, |
| 888 | 0, LOCKING_ANDX_OPLOCK_RELEASE, |
| 889 | 0 /* wait flag */); |
| 890 | cFYI(1,("Oplock release rc = %d ",rc)); |
| 891 | } |
| 892 | } else |
| 893 | spin_unlock(&GlobalMid_Lock); |
Steve French | 68058e7 | 2005-10-10 10:34:22 -0700 | [diff] [blame] | 894 | set_current_state(TASK_INTERRUPTIBLE); |
| 895 | schedule_timeout(1); /* yield in case q were corrupt */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 896 | } |
| 897 | } while(!signal_pending(current)); |
Steve French | 57337e4 | 2005-04-28 22:41:10 -0700 | [diff] [blame] | 898 | oplockThread = NULL; |
Steve French | f191401 | 2005-08-18 09:37:34 -0700 | [diff] [blame] | 899 | complete_and_exit (&cifs_oplock_exited, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 900 | } |
| 901 | |
Steve French | 8d0d509 | 2005-08-18 09:41:43 -0700 | [diff] [blame] | 902 | static int cifs_dnotify_thread(void * dummyarg) |
| 903 | { |
Steve French | 6ab16d2 | 2005-11-29 20:55:11 -0800 | [diff] [blame] | 904 | struct list_head *tmp; |
| 905 | struct cifsSesInfo *ses; |
| 906 | |
Steve French | 8d0d509 | 2005-08-18 09:41:43 -0700 | [diff] [blame] | 907 | daemonize("cifsdnotifyd"); |
| 908 | allow_signal(SIGTERM); |
| 909 | |
| 910 | dnotifyThread = current; |
| 911 | do { |
Steve French | 16abbec | 2005-08-30 13:10:14 -0700 | [diff] [blame] | 912 | if(try_to_freeze()) |
| 913 | continue; |
Steve French | 8d0d509 | 2005-08-18 09:41:43 -0700 | [diff] [blame] | 914 | set_current_state(TASK_INTERRUPTIBLE); |
Steve French | 6ab16d2 | 2005-11-29 20:55:11 -0800 | [diff] [blame] | 915 | schedule_timeout(15*HZ); |
| 916 | read_lock(&GlobalSMBSeslock); |
| 917 | /* check if any stuck requests that need |
| 918 | to be woken up and wakeq so the |
| 919 | thread can wake up and error out */ |
| 920 | list_for_each(tmp, &GlobalSMBSessionList) { |
| 921 | ses = list_entry(tmp, struct cifsSesInfo, |
| 922 | cifsSessionList); |
| 923 | if(ses && ses->server && |
Steve French | 2a138ebb | 2005-11-29 21:22:19 -0800 | [diff] [blame] | 924 | atomic_read(&ses->server->inFlight)) |
Steve French | 6ab16d2 | 2005-11-29 20:55:11 -0800 | [diff] [blame] | 925 | wake_up_all(&ses->server->response_q); |
| 926 | } |
| 927 | read_unlock(&GlobalSMBSeslock); |
Steve French | 8d0d509 | 2005-08-18 09:41:43 -0700 | [diff] [blame] | 928 | } while(!signal_pending(current)); |
| 929 | complete_and_exit (&cifs_dnotify_exited, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 930 | } |
| 931 | |
| 932 | static int __init |
| 933 | init_cifs(void) |
| 934 | { |
| 935 | int rc = 0; |
| 936 | #ifdef CONFIG_PROC_FS |
| 937 | cifs_proc_init(); |
| 938 | #endif |
| 939 | INIT_LIST_HEAD(&GlobalServerList); /* BB not implemented yet */ |
| 940 | INIT_LIST_HEAD(&GlobalSMBSessionList); |
| 941 | INIT_LIST_HEAD(&GlobalTreeConnectionList); |
| 942 | INIT_LIST_HEAD(&GlobalOplock_Q); |
Steve French | 4ca9c19 | 2005-10-10 19:52:13 -0700 | [diff] [blame] | 943 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
| 944 | INIT_LIST_HEAD(&GlobalDnotifyReqList); |
| 945 | INIT_LIST_HEAD(&GlobalDnotifyRsp_Q); |
| 946 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | /* |
| 948 | * Initialize Global counters |
| 949 | */ |
| 950 | atomic_set(&sesInfoAllocCount, 0); |
| 951 | atomic_set(&tconInfoAllocCount, 0); |
| 952 | atomic_set(&tcpSesAllocCount,0); |
| 953 | atomic_set(&tcpSesReconnectCount, 0); |
| 954 | atomic_set(&tconInfoReconnectCount, 0); |
| 955 | |
| 956 | atomic_set(&bufAllocCount, 0); |
| 957 | atomic_set(&midCount, 0); |
| 958 | GlobalCurrentXid = 0; |
| 959 | GlobalTotalActiveXid = 0; |
| 960 | GlobalMaxActiveXid = 0; |
| 961 | rwlock_init(&GlobalSMBSeslock); |
| 962 | spin_lock_init(&GlobalMid_Lock); |
| 963 | |
| 964 | if(cifs_max_pending < 2) { |
| 965 | cifs_max_pending = 2; |
| 966 | cFYI(1,("cifs_max_pending set to min of 2")); |
| 967 | } else if(cifs_max_pending > 256) { |
| 968 | cifs_max_pending = 256; |
| 969 | cFYI(1,("cifs_max_pending set to max of 256")); |
| 970 | } |
| 971 | |
| 972 | rc = cifs_init_inodecache(); |
| 973 | if (!rc) { |
| 974 | rc = cifs_init_mids(); |
| 975 | if (!rc) { |
| 976 | rc = cifs_init_request_bufs(); |
| 977 | if (!rc) { |
| 978 | rc = register_filesystem(&cifs_fs_type); |
| 979 | if (!rc) { |
| 980 | rc = (int)kernel_thread(cifs_oplock_thread, NULL, |
| 981 | CLONE_FS | CLONE_FILES | CLONE_VM); |
Steve French | 8d0d509 | 2005-08-18 09:41:43 -0700 | [diff] [blame] | 982 | if(rc > 0) { |
| 983 | rc = (int)kernel_thread(cifs_dnotify_thread, NULL, |
| 984 | CLONE_FS | CLONE_FILES | CLONE_VM); |
| 985 | if(rc > 0) |
| 986 | return 0; |
| 987 | else |
| 988 | cERROR(1,("error %d create dnotify thread", rc)); |
| 989 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 990 | cERROR(1,("error %d create oplock thread",rc)); |
Steve French | 8d0d509 | 2005-08-18 09:41:43 -0700 | [diff] [blame] | 991 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 992 | } |
| 993 | cifs_destroy_request_bufs(); |
| 994 | } |
| 995 | cifs_destroy_mids(); |
| 996 | } |
| 997 | cifs_destroy_inodecache(); |
| 998 | } |
| 999 | #ifdef CONFIG_PROC_FS |
| 1000 | cifs_proc_clean(); |
| 1001 | #endif |
| 1002 | return rc; |
| 1003 | } |
| 1004 | |
| 1005 | static void __exit |
| 1006 | exit_cifs(void) |
| 1007 | { |
| 1008 | cFYI(0, ("In unregister ie exit_cifs")); |
| 1009 | #ifdef CONFIG_PROC_FS |
| 1010 | cifs_proc_clean(); |
| 1011 | #endif |
| 1012 | unregister_filesystem(&cifs_fs_type); |
| 1013 | cifs_destroy_inodecache(); |
| 1014 | cifs_destroy_mids(); |
| 1015 | cifs_destroy_request_bufs(); |
| 1016 | if(oplockThread) { |
| 1017 | send_sig(SIGTERM, oplockThread, 1); |
| 1018 | wait_for_completion(&cifs_oplock_exited); |
| 1019 | } |
Steve French | 8d0d509 | 2005-08-18 09:41:43 -0700 | [diff] [blame] | 1020 | if(dnotifyThread) { |
| 1021 | send_sig(SIGTERM, dnotifyThread, 1); |
| 1022 | wait_for_completion(&cifs_dnotify_exited); |
| 1023 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1024 | } |
| 1025 | |
| 1026 | MODULE_AUTHOR("Steve French <sfrench@us.ibm.com>"); |
| 1027 | MODULE_LICENSE("GPL"); /* combination of LGPL + GPL source behaves as GPL */ |
| 1028 | MODULE_DESCRIPTION |
| 1029 | ("VFS to access servers complying with the SNIA CIFS Specification e.g. Samba and Windows"); |
| 1030 | MODULE_VERSION(CIFS_VERSION); |
| 1031 | module_init(init_cifs) |
| 1032 | module_exit(exit_cifs) |