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1da177e4 | 1 | /* |
d3870398 | 2 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. All Rights Reserved. |
1da177e4 LT |
3 | * |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of version 2 of the GNU General Public License as | |
6 | * published by the Free Software Foundation. | |
7 | * | |
8 | * This program is distributed in the hope that it would be useful, but | |
9 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. | |
11 | * | |
12 | * Further, this software is distributed without any warranty that it is | |
13 | * free of the rightful claim of any third person regarding infringement | |
14 | * or the like. Any license provided herein, whether implied or | |
15 | * otherwise, applies only to this software file. Patent licenses, if | |
16 | * any, provided herein do not apply to combinations of this program with | |
17 | * other software, or any other product whatsoever. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License along | |
20 | * with this program; if not, write the Free Software Foundation, Inc., 59 | |
21 | * Temple Place - Suite 330, Boston MA 02111-1307, USA. | |
22 | * | |
23 | * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy, | |
24 | * Mountain View, CA 94043, or: | |
25 | * | |
26 | * http://www.sgi.com | |
27 | * | |
28 | * For further information regarding this notice, see: | |
29 | * | |
30 | * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/ | |
31 | */ | |
32 | ||
33 | #include "xfs.h" | |
34 | ||
35 | #include "xfs_inum.h" | |
36 | #include "xfs_log.h" | |
37 | #include "xfs_clnt.h" | |
38 | #include "xfs_trans.h" | |
39 | #include "xfs_sb.h" | |
40 | #include "xfs_dir.h" | |
41 | #include "xfs_dir2.h" | |
42 | #include "xfs_alloc.h" | |
43 | #include "xfs_dmapi.h" | |
44 | #include "xfs_quota.h" | |
45 | #include "xfs_mount.h" | |
46 | #include "xfs_alloc_btree.h" | |
47 | #include "xfs_bmap_btree.h" | |
48 | #include "xfs_ialloc_btree.h" | |
49 | #include "xfs_btree.h" | |
50 | #include "xfs_ialloc.h" | |
51 | #include "xfs_attr_sf.h" | |
52 | #include "xfs_dir_sf.h" | |
53 | #include "xfs_dir2_sf.h" | |
54 | #include "xfs_dinode.h" | |
55 | #include "xfs_inode.h" | |
56 | #include "xfs_bmap.h" | |
57 | #include "xfs_bit.h" | |
58 | #include "xfs_rtalloc.h" | |
59 | #include "xfs_error.h" | |
60 | #include "xfs_itable.h" | |
61 | #include "xfs_rw.h" | |
62 | #include "xfs_acl.h" | |
63 | #include "xfs_cap.h" | |
64 | #include "xfs_mac.h" | |
65 | #include "xfs_attr.h" | |
66 | #include "xfs_buf_item.h" | |
67 | #include "xfs_utils.h" | |
68 | #include "xfs_version.h" | |
1da177e4 LT |
69 | |
70 | #include <linux/namei.h> | |
71 | #include <linux/init.h> | |
72 | #include <linux/mount.h> | |
0829c360 | 73 | #include <linux/mempool.h> |
1da177e4 | 74 | #include <linux/writeback.h> |
4df08c52 | 75 | #include <linux/kthread.h> |
1da177e4 LT |
76 | |
77 | STATIC struct quotactl_ops linvfs_qops; | |
78 | STATIC struct super_operations linvfs_sops; | |
0829c360 CH |
79 | STATIC kmem_zone_t *xfs_vnode_zone; |
80 | STATIC kmem_zone_t *xfs_ioend_zone; | |
81 | mempool_t *xfs_ioend_pool; | |
1da177e4 LT |
82 | |
83 | STATIC struct xfs_mount_args * | |
84 | xfs_args_allocate( | |
85 | struct super_block *sb) | |
86 | { | |
87 | struct xfs_mount_args *args; | |
88 | ||
89 | args = kmem_zalloc(sizeof(struct xfs_mount_args), KM_SLEEP); | |
90 | args->logbufs = args->logbufsize = -1; | |
91 | strncpy(args->fsname, sb->s_id, MAXNAMELEN); | |
92 | ||
93 | /* Copy the already-parsed mount(2) flags we're interested in */ | |
94 | if (sb->s_flags & MS_NOATIME) | |
95 | args->flags |= XFSMNT_NOATIME; | |
96 | if (sb->s_flags & MS_DIRSYNC) | |
97 | args->flags |= XFSMNT_DIRSYNC; | |
98 | if (sb->s_flags & MS_SYNCHRONOUS) | |
99 | args->flags |= XFSMNT_WSYNC; | |
100 | ||
101 | /* Default to 32 bit inodes on Linux all the time */ | |
102 | args->flags |= XFSMNT_32BITINODES; | |
103 | ||
104 | return args; | |
105 | } | |
106 | ||
107 | __uint64_t | |
108 | xfs_max_file_offset( | |
109 | unsigned int blockshift) | |
110 | { | |
111 | unsigned int pagefactor = 1; | |
112 | unsigned int bitshift = BITS_PER_LONG - 1; | |
113 | ||
114 | /* Figure out maximum filesize, on Linux this can depend on | |
115 | * the filesystem blocksize (on 32 bit platforms). | |
116 | * __block_prepare_write does this in an [unsigned] long... | |
117 | * page->index << (PAGE_CACHE_SHIFT - bbits) | |
118 | * So, for page sized blocks (4K on 32 bit platforms), | |
119 | * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is | |
120 | * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1) | |
121 | * but for smaller blocksizes it is less (bbits = log2 bsize). | |
122 | * Note1: get_block_t takes a long (implicit cast from above) | |
123 | * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch | |
124 | * can optionally convert the [unsigned] long from above into | |
125 | * an [unsigned] long long. | |
126 | */ | |
127 | ||
128 | #if BITS_PER_LONG == 32 | |
129 | # if defined(CONFIG_LBD) | |
130 | ASSERT(sizeof(sector_t) == 8); | |
131 | pagefactor = PAGE_CACHE_SIZE; | |
132 | bitshift = BITS_PER_LONG; | |
133 | # else | |
134 | pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift); | |
135 | # endif | |
136 | #endif | |
137 | ||
138 | return (((__uint64_t)pagefactor) << bitshift) - 1; | |
139 | } | |
140 | ||
141 | STATIC __inline__ void | |
142 | xfs_set_inodeops( | |
143 | struct inode *inode) | |
144 | { | |
0432dab2 CH |
145 | switch (inode->i_mode & S_IFMT) { |
146 | case S_IFREG: | |
1da177e4 LT |
147 | inode->i_op = &linvfs_file_inode_operations; |
148 | inode->i_fop = &linvfs_file_operations; | |
149 | inode->i_mapping->a_ops = &linvfs_aops; | |
0432dab2 CH |
150 | break; |
151 | case S_IFDIR: | |
1da177e4 LT |
152 | inode->i_op = &linvfs_dir_inode_operations; |
153 | inode->i_fop = &linvfs_dir_operations; | |
0432dab2 CH |
154 | break; |
155 | case S_IFLNK: | |
1da177e4 LT |
156 | inode->i_op = &linvfs_symlink_inode_operations; |
157 | if (inode->i_blocks) | |
158 | inode->i_mapping->a_ops = &linvfs_aops; | |
0432dab2 CH |
159 | break; |
160 | default: | |
1da177e4 LT |
161 | inode->i_op = &linvfs_file_inode_operations; |
162 | init_special_inode(inode, inode->i_mode, inode->i_rdev); | |
0432dab2 | 163 | break; |
1da177e4 LT |
164 | } |
165 | } | |
166 | ||
167 | STATIC __inline__ void | |
168 | xfs_revalidate_inode( | |
169 | xfs_mount_t *mp, | |
170 | vnode_t *vp, | |
171 | xfs_inode_t *ip) | |
172 | { | |
173 | struct inode *inode = LINVFS_GET_IP(vp); | |
174 | ||
0432dab2 | 175 | inode->i_mode = ip->i_d.di_mode; |
1da177e4 LT |
176 | inode->i_nlink = ip->i_d.di_nlink; |
177 | inode->i_uid = ip->i_d.di_uid; | |
178 | inode->i_gid = ip->i_d.di_gid; | |
0432dab2 CH |
179 | |
180 | switch (inode->i_mode & S_IFMT) { | |
181 | case S_IFBLK: | |
182 | case S_IFCHR: | |
183 | inode->i_rdev = | |
184 | MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff, | |
185 | sysv_minor(ip->i_df.if_u2.if_rdev)); | |
186 | break; | |
187 | default: | |
1da177e4 | 188 | inode->i_rdev = 0; |
0432dab2 | 189 | break; |
1da177e4 | 190 | } |
0432dab2 | 191 | |
e8c8b3a7 | 192 | inode->i_blksize = xfs_preferred_iosize(mp); |
1da177e4 LT |
193 | inode->i_generation = ip->i_d.di_gen; |
194 | i_size_write(inode, ip->i_d.di_size); | |
195 | inode->i_blocks = | |
196 | XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks); | |
197 | inode->i_atime.tv_sec = ip->i_d.di_atime.t_sec; | |
198 | inode->i_atime.tv_nsec = ip->i_d.di_atime.t_nsec; | |
199 | inode->i_mtime.tv_sec = ip->i_d.di_mtime.t_sec; | |
200 | inode->i_mtime.tv_nsec = ip->i_d.di_mtime.t_nsec; | |
201 | inode->i_ctime.tv_sec = ip->i_d.di_ctime.t_sec; | |
202 | inode->i_ctime.tv_nsec = ip->i_d.di_ctime.t_nsec; | |
203 | if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE) | |
204 | inode->i_flags |= S_IMMUTABLE; | |
205 | else | |
206 | inode->i_flags &= ~S_IMMUTABLE; | |
207 | if (ip->i_d.di_flags & XFS_DIFLAG_APPEND) | |
208 | inode->i_flags |= S_APPEND; | |
209 | else | |
210 | inode->i_flags &= ~S_APPEND; | |
211 | if (ip->i_d.di_flags & XFS_DIFLAG_SYNC) | |
212 | inode->i_flags |= S_SYNC; | |
213 | else | |
214 | inode->i_flags &= ~S_SYNC; | |
215 | if (ip->i_d.di_flags & XFS_DIFLAG_NOATIME) | |
216 | inode->i_flags |= S_NOATIME; | |
217 | else | |
218 | inode->i_flags &= ~S_NOATIME; | |
219 | vp->v_flag &= ~VMODIFIED; | |
220 | } | |
221 | ||
222 | void | |
223 | xfs_initialize_vnode( | |
224 | bhv_desc_t *bdp, | |
225 | vnode_t *vp, | |
226 | bhv_desc_t *inode_bhv, | |
227 | int unlock) | |
228 | { | |
229 | xfs_inode_t *ip = XFS_BHVTOI(inode_bhv); | |
230 | struct inode *inode = LINVFS_GET_IP(vp); | |
231 | ||
232 | if (!inode_bhv->bd_vobj) { | |
233 | vp->v_vfsp = bhvtovfs(bdp); | |
234 | bhv_desc_init(inode_bhv, ip, vp, &xfs_vnodeops); | |
235 | bhv_insert(VN_BHV_HEAD(vp), inode_bhv); | |
236 | } | |
237 | ||
238 | /* | |
239 | * We need to set the ops vectors, and unlock the inode, but if | |
240 | * we have been called during the new inode create process, it is | |
241 | * too early to fill in the Linux inode. We will get called a | |
242 | * second time once the inode is properly set up, and then we can | |
243 | * finish our work. | |
244 | */ | |
245 | if (ip->i_d.di_mode != 0 && unlock && (inode->i_state & I_NEW)) { | |
1da177e4 LT |
246 | xfs_revalidate_inode(XFS_BHVTOM(bdp), vp, ip); |
247 | xfs_set_inodeops(inode); | |
248 | ||
249 | ip->i_flags &= ~XFS_INEW; | |
250 | barrier(); | |
251 | ||
252 | unlock_new_inode(inode); | |
253 | } | |
254 | } | |
255 | ||
256 | int | |
257 | xfs_blkdev_get( | |
258 | xfs_mount_t *mp, | |
259 | const char *name, | |
260 | struct block_device **bdevp) | |
261 | { | |
262 | int error = 0; | |
263 | ||
264 | *bdevp = open_bdev_excl(name, 0, mp); | |
265 | if (IS_ERR(*bdevp)) { | |
266 | error = PTR_ERR(*bdevp); | |
267 | printk("XFS: Invalid device [%s], error=%d\n", name, error); | |
268 | } | |
269 | ||
270 | return -error; | |
271 | } | |
272 | ||
273 | void | |
274 | xfs_blkdev_put( | |
275 | struct block_device *bdev) | |
276 | { | |
277 | if (bdev) | |
278 | close_bdev_excl(bdev); | |
279 | } | |
280 | ||
f538d4da CH |
281 | /* |
282 | * Try to write out the superblock using barriers. | |
283 | */ | |
284 | STATIC int | |
285 | xfs_barrier_test( | |
286 | xfs_mount_t *mp) | |
287 | { | |
288 | xfs_buf_t *sbp = xfs_getsb(mp, 0); | |
289 | int error; | |
290 | ||
291 | XFS_BUF_UNDONE(sbp); | |
292 | XFS_BUF_UNREAD(sbp); | |
293 | XFS_BUF_UNDELAYWRITE(sbp); | |
294 | XFS_BUF_WRITE(sbp); | |
295 | XFS_BUF_UNASYNC(sbp); | |
296 | XFS_BUF_ORDERED(sbp); | |
297 | ||
298 | xfsbdstrat(mp, sbp); | |
299 | error = xfs_iowait(sbp); | |
300 | ||
301 | /* | |
302 | * Clear all the flags we set and possible error state in the | |
303 | * buffer. We only did the write to try out whether barriers | |
304 | * worked and shouldn't leave any traces in the superblock | |
305 | * buffer. | |
306 | */ | |
307 | XFS_BUF_DONE(sbp); | |
308 | XFS_BUF_ERROR(sbp, 0); | |
309 | XFS_BUF_UNORDERED(sbp); | |
310 | ||
311 | xfs_buf_relse(sbp); | |
312 | return error; | |
313 | } | |
314 | ||
315 | void | |
316 | xfs_mountfs_check_barriers(xfs_mount_t *mp) | |
317 | { | |
318 | int error; | |
319 | ||
320 | if (mp->m_logdev_targp != mp->m_ddev_targp) { | |
321 | xfs_fs_cmn_err(CE_NOTE, mp, | |
322 | "Disabling barriers, not supported with external log device"); | |
323 | mp->m_flags &= ~XFS_MOUNT_BARRIER; | |
324 | } | |
325 | ||
326 | if (mp->m_ddev_targp->pbr_bdev->bd_disk->queue->ordered == | |
327 | QUEUE_ORDERED_NONE) { | |
328 | xfs_fs_cmn_err(CE_NOTE, mp, | |
329 | "Disabling barriers, not supported by the underlying device"); | |
330 | mp->m_flags &= ~XFS_MOUNT_BARRIER; | |
331 | } | |
332 | ||
333 | error = xfs_barrier_test(mp); | |
334 | if (error) { | |
335 | xfs_fs_cmn_err(CE_NOTE, mp, | |
336 | "Disabling barriers, trial barrier write failed"); | |
337 | mp->m_flags &= ~XFS_MOUNT_BARRIER; | |
338 | } | |
339 | } | |
340 | ||
341 | void | |
342 | xfs_blkdev_issue_flush( | |
343 | xfs_buftarg_t *buftarg) | |
344 | { | |
345 | blkdev_issue_flush(buftarg->pbr_bdev, NULL); | |
346 | } | |
1da177e4 LT |
347 | |
348 | STATIC struct inode * | |
349 | linvfs_alloc_inode( | |
350 | struct super_block *sb) | |
351 | { | |
352 | vnode_t *vp; | |
353 | ||
0829c360 | 354 | vp = kmem_cache_alloc(xfs_vnode_zone, kmem_flags_convert(KM_SLEEP)); |
1da177e4 LT |
355 | if (!vp) |
356 | return NULL; | |
357 | return LINVFS_GET_IP(vp); | |
358 | } | |
359 | ||
360 | STATIC void | |
361 | linvfs_destroy_inode( | |
362 | struct inode *inode) | |
363 | { | |
0829c360 | 364 | kmem_zone_free(xfs_vnode_zone, LINVFS_GET_VP(inode)); |
1da177e4 LT |
365 | } |
366 | ||
367 | STATIC void | |
0829c360 | 368 | linvfs_inode_init_once( |
1da177e4 LT |
369 | void *data, |
370 | kmem_cache_t *cachep, | |
371 | unsigned long flags) | |
372 | { | |
373 | vnode_t *vp = (vnode_t *)data; | |
374 | ||
375 | if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == | |
376 | SLAB_CTOR_CONSTRUCTOR) | |
377 | inode_init_once(LINVFS_GET_IP(vp)); | |
378 | } | |
379 | ||
380 | STATIC int | |
0829c360 | 381 | linvfs_init_zones(void) |
1da177e4 | 382 | { |
0829c360 | 383 | xfs_vnode_zone = kmem_cache_create("xfs_vnode", |
1da177e4 | 384 | sizeof(vnode_t), 0, SLAB_RECLAIM_ACCOUNT, |
0829c360 CH |
385 | linvfs_inode_init_once, NULL); |
386 | if (!xfs_vnode_zone) | |
387 | goto out; | |
388 | ||
389 | xfs_ioend_zone = kmem_zone_init(sizeof(xfs_ioend_t), "xfs_ioend"); | |
390 | if (!xfs_ioend_zone) | |
391 | goto out_destroy_vnode_zone; | |
392 | ||
393 | xfs_ioend_pool = mempool_create(4 * MAX_BUF_PER_PAGE, | |
394 | mempool_alloc_slab, mempool_free_slab, | |
395 | xfs_ioend_zone); | |
396 | if (!xfs_ioend_pool) | |
397 | goto out_free_ioend_zone; | |
398 | ||
1da177e4 | 399 | return 0; |
0829c360 CH |
400 | |
401 | ||
402 | out_free_ioend_zone: | |
403 | kmem_zone_destroy(xfs_ioend_zone); | |
404 | out_destroy_vnode_zone: | |
405 | kmem_zone_destroy(xfs_vnode_zone); | |
406 | out: | |
407 | return -ENOMEM; | |
1da177e4 LT |
408 | } |
409 | ||
410 | STATIC void | |
0829c360 | 411 | linvfs_destroy_zones(void) |
1da177e4 | 412 | { |
0829c360 CH |
413 | mempool_destroy(xfs_ioend_pool); |
414 | kmem_zone_destroy(xfs_vnode_zone); | |
415 | kmem_zone_destroy(xfs_ioend_zone); | |
1da177e4 LT |
416 | } |
417 | ||
418 | /* | |
419 | * Attempt to flush the inode, this will actually fail | |
420 | * if the inode is pinned, but we dirty the inode again | |
421 | * at the point when it is unpinned after a log write, | |
422 | * since this is when the inode itself becomes flushable. | |
423 | */ | |
424 | STATIC int | |
425 | linvfs_write_inode( | |
426 | struct inode *inode, | |
427 | int sync) | |
428 | { | |
429 | vnode_t *vp = LINVFS_GET_VP(inode); | |
430 | int error = 0, flags = FLUSH_INODE; | |
431 | ||
432 | if (vp) { | |
433 | vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address); | |
434 | if (sync) | |
435 | flags |= FLUSH_SYNC; | |
436 | VOP_IFLUSH(vp, flags, error); | |
437 | if (error == EAGAIN) { | |
438 | if (sync) | |
439 | VOP_IFLUSH(vp, flags | FLUSH_LOG, error); | |
440 | else | |
441 | error = 0; | |
442 | } | |
443 | } | |
444 | ||
445 | return -error; | |
446 | } | |
447 | ||
448 | STATIC void | |
449 | linvfs_clear_inode( | |
450 | struct inode *inode) | |
451 | { | |
452 | vnode_t *vp = LINVFS_GET_VP(inode); | |
56d433e4 | 453 | int error, cache; |
1da177e4 | 454 | |
56d433e4 CH |
455 | vn_trace_entry(vp, "clear_inode", (inst_t *)__return_address); |
456 | ||
56d433e4 CH |
457 | XFS_STATS_INC(vn_rele); |
458 | XFS_STATS_INC(vn_remove); | |
459 | XFS_STATS_INC(vn_reclaim); | |
460 | XFS_STATS_DEC(vn_active); | |
461 | ||
02ba71de CH |
462 | /* |
463 | * This can happen because xfs_iget_core calls xfs_idestroy if we | |
464 | * find an inode with di_mode == 0 but without IGET_CREATE set. | |
465 | */ | |
466 | if (vp->v_fbhv) | |
467 | VOP_INACTIVE(vp, NULL, cache); | |
1da177e4 | 468 | |
56d433e4 CH |
469 | VN_LOCK(vp); |
470 | vp->v_flag &= ~VMODIFIED; | |
471 | VN_UNLOCK(vp, 0); | |
472 | ||
0c147f9a FB |
473 | if (vp->v_fbhv) { |
474 | VOP_RECLAIM(vp, error); | |
475 | if (error) | |
476 | panic("vn_purge: cannot reclaim"); | |
477 | } | |
56d433e4 CH |
478 | |
479 | ASSERT(vp->v_fbhv == NULL); | |
480 | ||
481 | #ifdef XFS_VNODE_TRACE | |
482 | ktrace_free(vp->v_trace); | |
483 | #endif | |
484 | } | |
1da177e4 LT |
485 | |
486 | /* | |
487 | * Enqueue a work item to be picked up by the vfs xfssyncd thread. | |
488 | * Doing this has two advantages: | |
489 | * - It saves on stack space, which is tight in certain situations | |
490 | * - It can be used (with care) as a mechanism to avoid deadlocks. | |
491 | * Flushing while allocating in a full filesystem requires both. | |
492 | */ | |
493 | STATIC void | |
494 | xfs_syncd_queue_work( | |
495 | struct vfs *vfs, | |
496 | void *data, | |
497 | void (*syncer)(vfs_t *, void *)) | |
498 | { | |
499 | vfs_sync_work_t *work; | |
500 | ||
501 | work = kmem_alloc(sizeof(struct vfs_sync_work), KM_SLEEP); | |
502 | INIT_LIST_HEAD(&work->w_list); | |
503 | work->w_syncer = syncer; | |
504 | work->w_data = data; | |
505 | work->w_vfs = vfs; | |
506 | spin_lock(&vfs->vfs_sync_lock); | |
507 | list_add_tail(&work->w_list, &vfs->vfs_sync_list); | |
508 | spin_unlock(&vfs->vfs_sync_lock); | |
509 | wake_up_process(vfs->vfs_sync_task); | |
510 | } | |
511 | ||
512 | /* | |
513 | * Flush delayed allocate data, attempting to free up reserved space | |
514 | * from existing allocations. At this point a new allocation attempt | |
515 | * has failed with ENOSPC and we are in the process of scratching our | |
516 | * heads, looking about for more room... | |
517 | */ | |
518 | STATIC void | |
519 | xfs_flush_inode_work( | |
520 | vfs_t *vfs, | |
521 | void *inode) | |
522 | { | |
523 | filemap_flush(((struct inode *)inode)->i_mapping); | |
524 | iput((struct inode *)inode); | |
525 | } | |
526 | ||
527 | void | |
528 | xfs_flush_inode( | |
529 | xfs_inode_t *ip) | |
530 | { | |
531 | struct inode *inode = LINVFS_GET_IP(XFS_ITOV(ip)); | |
532 | struct vfs *vfs = XFS_MTOVFS(ip->i_mount); | |
533 | ||
534 | igrab(inode); | |
535 | xfs_syncd_queue_work(vfs, inode, xfs_flush_inode_work); | |
041e0e3b | 536 | delay(msecs_to_jiffies(500)); |
1da177e4 LT |
537 | } |
538 | ||
539 | /* | |
540 | * This is the "bigger hammer" version of xfs_flush_inode_work... | |
541 | * (IOW, "If at first you don't succeed, use a Bigger Hammer"). | |
542 | */ | |
543 | STATIC void | |
544 | xfs_flush_device_work( | |
545 | vfs_t *vfs, | |
546 | void *inode) | |
547 | { | |
548 | sync_blockdev(vfs->vfs_super->s_bdev); | |
549 | iput((struct inode *)inode); | |
550 | } | |
551 | ||
552 | void | |
553 | xfs_flush_device( | |
554 | xfs_inode_t *ip) | |
555 | { | |
556 | struct inode *inode = LINVFS_GET_IP(XFS_ITOV(ip)); | |
557 | struct vfs *vfs = XFS_MTOVFS(ip->i_mount); | |
558 | ||
559 | igrab(inode); | |
560 | xfs_syncd_queue_work(vfs, inode, xfs_flush_device_work); | |
041e0e3b | 561 | delay(msecs_to_jiffies(500)); |
1da177e4 LT |
562 | xfs_log_force(ip->i_mount, (xfs_lsn_t)0, XFS_LOG_FORCE|XFS_LOG_SYNC); |
563 | } | |
564 | ||
565 | #define SYNCD_FLAGS (SYNC_FSDATA|SYNC_BDFLUSH|SYNC_ATTR) | |
566 | STATIC void | |
567 | vfs_sync_worker( | |
568 | vfs_t *vfsp, | |
569 | void *unused) | |
570 | { | |
571 | int error; | |
572 | ||
573 | if (!(vfsp->vfs_flag & VFS_RDONLY)) | |
574 | VFS_SYNC(vfsp, SYNCD_FLAGS, NULL, error); | |
575 | vfsp->vfs_sync_seq++; | |
576 | wmb(); | |
577 | wake_up(&vfsp->vfs_wait_single_sync_task); | |
578 | } | |
579 | ||
580 | STATIC int | |
581 | xfssyncd( | |
582 | void *arg) | |
583 | { | |
584 | long timeleft; | |
585 | vfs_t *vfsp = (vfs_t *) arg; | |
1da177e4 | 586 | struct vfs_sync_work *work, *n; |
4df08c52 | 587 | LIST_HEAD (tmp); |
1da177e4 | 588 | |
041e0e3b | 589 | timeleft = xfs_syncd_centisecs * msecs_to_jiffies(10); |
1da177e4 | 590 | for (;;) { |
041e0e3b | 591 | timeleft = schedule_timeout_interruptible(timeleft); |
1da177e4 | 592 | /* swsusp */ |
3e1d1d28 | 593 | try_to_freeze(); |
4df08c52 | 594 | if (kthread_should_stop()) |
1da177e4 LT |
595 | break; |
596 | ||
597 | spin_lock(&vfsp->vfs_sync_lock); | |
598 | /* | |
599 | * We can get woken by laptop mode, to do a sync - | |
600 | * that's the (only!) case where the list would be | |
601 | * empty with time remaining. | |
602 | */ | |
603 | if (!timeleft || list_empty(&vfsp->vfs_sync_list)) { | |
604 | if (!timeleft) | |
041e0e3b NA |
605 | timeleft = xfs_syncd_centisecs * |
606 | msecs_to_jiffies(10); | |
1da177e4 LT |
607 | INIT_LIST_HEAD(&vfsp->vfs_sync_work.w_list); |
608 | list_add_tail(&vfsp->vfs_sync_work.w_list, | |
609 | &vfsp->vfs_sync_list); | |
610 | } | |
611 | list_for_each_entry_safe(work, n, &vfsp->vfs_sync_list, w_list) | |
612 | list_move(&work->w_list, &tmp); | |
613 | spin_unlock(&vfsp->vfs_sync_lock); | |
614 | ||
615 | list_for_each_entry_safe(work, n, &tmp, w_list) { | |
616 | (*work->w_syncer)(vfsp, work->w_data); | |
617 | list_del(&work->w_list); | |
618 | if (work == &vfsp->vfs_sync_work) | |
619 | continue; | |
620 | kmem_free(work, sizeof(struct vfs_sync_work)); | |
621 | } | |
622 | } | |
623 | ||
1da177e4 LT |
624 | return 0; |
625 | } | |
626 | ||
627 | STATIC int | |
628 | linvfs_start_syncd( | |
629 | vfs_t *vfsp) | |
630 | { | |
4df08c52 CH |
631 | vfsp->vfs_sync_work.w_syncer = vfs_sync_worker; |
632 | vfsp->vfs_sync_work.w_vfs = vfsp; | |
633 | vfsp->vfs_sync_task = kthread_run(xfssyncd, vfsp, "xfssyncd"); | |
634 | if (IS_ERR(vfsp->vfs_sync_task)) | |
635 | return -PTR_ERR(vfsp->vfs_sync_task); | |
1da177e4 LT |
636 | return 0; |
637 | } | |
638 | ||
639 | STATIC void | |
640 | linvfs_stop_syncd( | |
641 | vfs_t *vfsp) | |
642 | { | |
4df08c52 | 643 | kthread_stop(vfsp->vfs_sync_task); |
1da177e4 LT |
644 | } |
645 | ||
646 | STATIC void | |
647 | linvfs_put_super( | |
648 | struct super_block *sb) | |
649 | { | |
650 | vfs_t *vfsp = LINVFS_GET_VFS(sb); | |
651 | int error; | |
652 | ||
653 | linvfs_stop_syncd(vfsp); | |
654 | VFS_SYNC(vfsp, SYNC_ATTR|SYNC_DELWRI, NULL, error); | |
655 | if (!error) | |
656 | VFS_UNMOUNT(vfsp, 0, NULL, error); | |
657 | if (error) { | |
658 | printk("XFS unmount got error %d\n", error); | |
659 | printk("%s: vfsp/0x%p left dangling!\n", __FUNCTION__, vfsp); | |
660 | return; | |
661 | } | |
662 | ||
663 | vfs_deallocate(vfsp); | |
664 | } | |
665 | ||
666 | STATIC void | |
667 | linvfs_write_super( | |
668 | struct super_block *sb) | |
669 | { | |
670 | vfs_t *vfsp = LINVFS_GET_VFS(sb); | |
671 | int error; | |
672 | ||
673 | if (sb->s_flags & MS_RDONLY) { | |
674 | sb->s_dirt = 0; /* paranoia */ | |
675 | return; | |
676 | } | |
677 | /* Push the log and superblock a little */ | |
678 | VFS_SYNC(vfsp, SYNC_FSDATA, NULL, error); | |
679 | sb->s_dirt = 0; | |
680 | } | |
681 | ||
682 | STATIC int | |
683 | linvfs_sync_super( | |
684 | struct super_block *sb, | |
685 | int wait) | |
686 | { | |
687 | vfs_t *vfsp = LINVFS_GET_VFS(sb); | |
688 | int error; | |
689 | int flags = SYNC_FSDATA; | |
690 | ||
f898d6c0 CH |
691 | if (unlikely(sb->s_frozen == SB_FREEZE_WRITE)) |
692 | flags = SYNC_QUIESCE; | |
693 | else | |
694 | flags = SYNC_FSDATA | (wait ? SYNC_WAIT : 0); | |
1da177e4 LT |
695 | |
696 | VFS_SYNC(vfsp, flags, NULL, error); | |
697 | sb->s_dirt = 0; | |
698 | ||
699 | if (unlikely(laptop_mode)) { | |
700 | int prev_sync_seq = vfsp->vfs_sync_seq; | |
701 | ||
702 | /* | |
703 | * The disk must be active because we're syncing. | |
704 | * We schedule xfssyncd now (now that the disk is | |
705 | * active) instead of later (when it might not be). | |
706 | */ | |
707 | wake_up_process(vfsp->vfs_sync_task); | |
708 | /* | |
709 | * We have to wait for the sync iteration to complete. | |
710 | * If we don't, the disk activity caused by the sync | |
711 | * will come after the sync is completed, and that | |
712 | * triggers another sync from laptop mode. | |
713 | */ | |
714 | wait_event(vfsp->vfs_wait_single_sync_task, | |
715 | vfsp->vfs_sync_seq != prev_sync_seq); | |
716 | } | |
717 | ||
718 | return -error; | |
719 | } | |
720 | ||
721 | STATIC int | |
722 | linvfs_statfs( | |
723 | struct super_block *sb, | |
724 | struct kstatfs *statp) | |
725 | { | |
726 | vfs_t *vfsp = LINVFS_GET_VFS(sb); | |
727 | int error; | |
728 | ||
729 | VFS_STATVFS(vfsp, statp, NULL, error); | |
730 | return -error; | |
731 | } | |
732 | ||
733 | STATIC int | |
734 | linvfs_remount( | |
735 | struct super_block *sb, | |
736 | int *flags, | |
737 | char *options) | |
738 | { | |
739 | vfs_t *vfsp = LINVFS_GET_VFS(sb); | |
740 | struct xfs_mount_args *args = xfs_args_allocate(sb); | |
741 | int error; | |
742 | ||
743 | VFS_PARSEARGS(vfsp, options, args, 1, error); | |
744 | if (!error) | |
745 | VFS_MNTUPDATE(vfsp, flags, args, error); | |
746 | kmem_free(args, sizeof(*args)); | |
747 | return -error; | |
748 | } | |
749 | ||
750 | STATIC void | |
751 | linvfs_freeze_fs( | |
752 | struct super_block *sb) | |
753 | { | |
754 | VFS_FREEZE(LINVFS_GET_VFS(sb)); | |
755 | } | |
756 | ||
757 | STATIC int | |
758 | linvfs_show_options( | |
759 | struct seq_file *m, | |
760 | struct vfsmount *mnt) | |
761 | { | |
762 | struct vfs *vfsp = LINVFS_GET_VFS(mnt->mnt_sb); | |
763 | int error; | |
764 | ||
765 | VFS_SHOWARGS(vfsp, m, error); | |
766 | return error; | |
767 | } | |
768 | ||
ee34807a NS |
769 | STATIC int |
770 | linvfs_quotasync( | |
771 | struct super_block *sb, | |
772 | int type) | |
773 | { | |
774 | struct vfs *vfsp = LINVFS_GET_VFS(sb); | |
775 | int error; | |
776 | ||
777 | VFS_QUOTACTL(vfsp, Q_XQUOTASYNC, 0, (caddr_t)NULL, error); | |
778 | return -error; | |
779 | } | |
780 | ||
1da177e4 LT |
781 | STATIC int |
782 | linvfs_getxstate( | |
783 | struct super_block *sb, | |
784 | struct fs_quota_stat *fqs) | |
785 | { | |
786 | struct vfs *vfsp = LINVFS_GET_VFS(sb); | |
787 | int error; | |
788 | ||
789 | VFS_QUOTACTL(vfsp, Q_XGETQSTAT, 0, (caddr_t)fqs, error); | |
790 | return -error; | |
791 | } | |
792 | ||
793 | STATIC int | |
794 | linvfs_setxstate( | |
795 | struct super_block *sb, | |
796 | unsigned int flags, | |
797 | int op) | |
798 | { | |
799 | struct vfs *vfsp = LINVFS_GET_VFS(sb); | |
800 | int error; | |
801 | ||
802 | VFS_QUOTACTL(vfsp, op, 0, (caddr_t)&flags, error); | |
803 | return -error; | |
804 | } | |
805 | ||
806 | STATIC int | |
807 | linvfs_getxquota( | |
808 | struct super_block *sb, | |
809 | int type, | |
810 | qid_t id, | |
811 | struct fs_disk_quota *fdq) | |
812 | { | |
813 | struct vfs *vfsp = LINVFS_GET_VFS(sb); | |
814 | int error, getmode; | |
815 | ||
c8ad20ff NS |
816 | getmode = (type == USRQUOTA) ? Q_XGETQUOTA : |
817 | ((type == GRPQUOTA) ? Q_XGETGQUOTA : Q_XGETPQUOTA); | |
1da177e4 LT |
818 | VFS_QUOTACTL(vfsp, getmode, id, (caddr_t)fdq, error); |
819 | return -error; | |
820 | } | |
821 | ||
822 | STATIC int | |
823 | linvfs_setxquota( | |
824 | struct super_block *sb, | |
825 | int type, | |
826 | qid_t id, | |
827 | struct fs_disk_quota *fdq) | |
828 | { | |
829 | struct vfs *vfsp = LINVFS_GET_VFS(sb); | |
830 | int error, setmode; | |
831 | ||
c8ad20ff NS |
832 | setmode = (type == USRQUOTA) ? Q_XSETQLIM : |
833 | ((type == GRPQUOTA) ? Q_XSETGQLIM : Q_XSETPQLIM); | |
1da177e4 LT |
834 | VFS_QUOTACTL(vfsp, setmode, id, (caddr_t)fdq, error); |
835 | return -error; | |
836 | } | |
837 | ||
838 | STATIC int | |
839 | linvfs_fill_super( | |
840 | struct super_block *sb, | |
841 | void *data, | |
842 | int silent) | |
843 | { | |
844 | vnode_t *rootvp; | |
845 | struct vfs *vfsp = vfs_allocate(); | |
846 | struct xfs_mount_args *args = xfs_args_allocate(sb); | |
847 | struct kstatfs statvfs; | |
848 | int error, error2; | |
849 | ||
850 | vfsp->vfs_super = sb; | |
851 | LINVFS_SET_VFS(sb, vfsp); | |
852 | if (sb->s_flags & MS_RDONLY) | |
853 | vfsp->vfs_flag |= VFS_RDONLY; | |
854 | bhv_insert_all_vfsops(vfsp); | |
855 | ||
856 | VFS_PARSEARGS(vfsp, (char *)data, args, 0, error); | |
857 | if (error) { | |
858 | bhv_remove_all_vfsops(vfsp, 1); | |
859 | goto fail_vfsop; | |
860 | } | |
861 | ||
862 | sb_min_blocksize(sb, BBSIZE); | |
863 | #ifdef CONFIG_XFS_EXPORT | |
864 | sb->s_export_op = &linvfs_export_ops; | |
865 | #endif | |
866 | sb->s_qcop = &linvfs_qops; | |
867 | sb->s_op = &linvfs_sops; | |
868 | ||
869 | VFS_MOUNT(vfsp, args, NULL, error); | |
870 | if (error) { | |
871 | bhv_remove_all_vfsops(vfsp, 1); | |
872 | goto fail_vfsop; | |
873 | } | |
874 | ||
875 | VFS_STATVFS(vfsp, &statvfs, NULL, error); | |
876 | if (error) | |
877 | goto fail_unmount; | |
878 | ||
879 | sb->s_dirt = 1; | |
880 | sb->s_magic = statvfs.f_type; | |
881 | sb->s_blocksize = statvfs.f_bsize; | |
882 | sb->s_blocksize_bits = ffs(statvfs.f_bsize) - 1; | |
883 | sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits); | |
884 | sb->s_time_gran = 1; | |
885 | set_posix_acl_flag(sb); | |
886 | ||
887 | VFS_ROOT(vfsp, &rootvp, error); | |
888 | if (error) | |
889 | goto fail_unmount; | |
890 | ||
891 | sb->s_root = d_alloc_root(LINVFS_GET_IP(rootvp)); | |
892 | if (!sb->s_root) { | |
893 | error = ENOMEM; | |
894 | goto fail_vnrele; | |
895 | } | |
896 | if (is_bad_inode(sb->s_root->d_inode)) { | |
897 | error = EINVAL; | |
898 | goto fail_vnrele; | |
899 | } | |
900 | if ((error = linvfs_start_syncd(vfsp))) | |
901 | goto fail_vnrele; | |
902 | vn_trace_exit(rootvp, __FUNCTION__, (inst_t *)__return_address); | |
903 | ||
904 | kmem_free(args, sizeof(*args)); | |
905 | return 0; | |
906 | ||
907 | fail_vnrele: | |
908 | if (sb->s_root) { | |
909 | dput(sb->s_root); | |
910 | sb->s_root = NULL; | |
911 | } else { | |
912 | VN_RELE(rootvp); | |
913 | } | |
914 | ||
915 | fail_unmount: | |
916 | VFS_UNMOUNT(vfsp, 0, NULL, error2); | |
917 | ||
918 | fail_vfsop: | |
919 | vfs_deallocate(vfsp); | |
920 | kmem_free(args, sizeof(*args)); | |
921 | return -error; | |
922 | } | |
923 | ||
924 | STATIC struct super_block * | |
925 | linvfs_get_sb( | |
926 | struct file_system_type *fs_type, | |
927 | int flags, | |
928 | const char *dev_name, | |
929 | void *data) | |
930 | { | |
931 | return get_sb_bdev(fs_type, flags, dev_name, data, linvfs_fill_super); | |
932 | } | |
933 | ||
934 | STATIC struct super_operations linvfs_sops = { | |
935 | .alloc_inode = linvfs_alloc_inode, | |
936 | .destroy_inode = linvfs_destroy_inode, | |
937 | .write_inode = linvfs_write_inode, | |
938 | .clear_inode = linvfs_clear_inode, | |
939 | .put_super = linvfs_put_super, | |
940 | .write_super = linvfs_write_super, | |
941 | .sync_fs = linvfs_sync_super, | |
942 | .write_super_lockfs = linvfs_freeze_fs, | |
943 | .statfs = linvfs_statfs, | |
944 | .remount_fs = linvfs_remount, | |
945 | .show_options = linvfs_show_options, | |
946 | }; | |
947 | ||
948 | STATIC struct quotactl_ops linvfs_qops = { | |
ee34807a | 949 | .quota_sync = linvfs_quotasync, |
1da177e4 LT |
950 | .get_xstate = linvfs_getxstate, |
951 | .set_xstate = linvfs_setxstate, | |
952 | .get_xquota = linvfs_getxquota, | |
953 | .set_xquota = linvfs_setxquota, | |
954 | }; | |
955 | ||
956 | STATIC struct file_system_type xfs_fs_type = { | |
957 | .owner = THIS_MODULE, | |
958 | .name = "xfs", | |
959 | .get_sb = linvfs_get_sb, | |
960 | .kill_sb = kill_block_super, | |
961 | .fs_flags = FS_REQUIRES_DEV, | |
962 | }; | |
963 | ||
964 | ||
965 | STATIC int __init | |
966 | init_xfs_fs( void ) | |
967 | { | |
968 | int error; | |
969 | struct sysinfo si; | |
970 | static char message[] __initdata = KERN_INFO \ | |
971 | XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled\n"; | |
972 | ||
973 | printk(message); | |
974 | ||
975 | si_meminfo(&si); | |
976 | xfs_physmem = si.totalram; | |
977 | ||
978 | ktrace_init(64); | |
979 | ||
0829c360 | 980 | error = linvfs_init_zones(); |
1da177e4 | 981 | if (error < 0) |
0829c360 | 982 | goto undo_zones; |
1da177e4 LT |
983 | |
984 | error = pagebuf_init(); | |
985 | if (error < 0) | |
986 | goto undo_pagebuf; | |
987 | ||
988 | vn_init(); | |
989 | xfs_init(); | |
990 | uuid_init(); | |
991 | vfs_initquota(); | |
992 | ||
993 | error = register_filesystem(&xfs_fs_type); | |
994 | if (error) | |
995 | goto undo_register; | |
996 | XFS_DM_INIT(&xfs_fs_type); | |
997 | return 0; | |
998 | ||
999 | undo_register: | |
1000 | pagebuf_terminate(); | |
1001 | ||
1002 | undo_pagebuf: | |
0829c360 | 1003 | linvfs_destroy_zones(); |
1da177e4 | 1004 | |
0829c360 | 1005 | undo_zones: |
1da177e4 LT |
1006 | return error; |
1007 | } | |
1008 | ||
1009 | STATIC void __exit | |
1010 | exit_xfs_fs( void ) | |
1011 | { | |
1012 | vfs_exitquota(); | |
1013 | XFS_DM_EXIT(&xfs_fs_type); | |
1014 | unregister_filesystem(&xfs_fs_type); | |
1015 | xfs_cleanup(); | |
1016 | pagebuf_terminate(); | |
0829c360 | 1017 | linvfs_destroy_zones(); |
1da177e4 LT |
1018 | ktrace_uninit(); |
1019 | } | |
1020 | ||
1021 | module_init(init_xfs_fs); | |
1022 | module_exit(exit_xfs_fs); | |
1023 | ||
1024 | MODULE_AUTHOR("Silicon Graphics, Inc."); | |
1025 | MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled"); | |
1026 | MODULE_LICENSE("GPL"); |