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1da177e4 | 1 | /* |
a805bad5 | 2 | * Copyright (c) 2000-2006 Silicon Graphics, Inc. |
7b718769 | 3 | * All Rights Reserved. |
1da177e4 | 4 | * |
7b718769 NS |
5 | * This program is free software; you can redistribute it and/or |
6 | * modify it under the terms of the GNU General Public License as | |
1da177e4 LT |
7 | * published by the Free Software Foundation. |
8 | * | |
7b718769 NS |
9 | * This program is distributed in the hope that it would be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
1da177e4 | 13 | * |
7b718769 NS |
14 | * You should have received a copy of the GNU General Public License |
15 | * along with this program; if not, write the Free Software Foundation, | |
16 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | |
1da177e4 | 17 | */ |
1da177e4 | 18 | #include "xfs.h" |
a844f451 | 19 | #include "xfs_bit.h" |
1da177e4 LT |
20 | #include "xfs_log.h" |
21 | #include "xfs_clnt.h" | |
a844f451 | 22 | #include "xfs_inum.h" |
1da177e4 LT |
23 | #include "xfs_trans.h" |
24 | #include "xfs_sb.h" | |
a844f451 | 25 | #include "xfs_ag.h" |
1da177e4 LT |
26 | #include "xfs_dir2.h" |
27 | #include "xfs_alloc.h" | |
28 | #include "xfs_dmapi.h" | |
29 | #include "xfs_quota.h" | |
30 | #include "xfs_mount.h" | |
1da177e4 | 31 | #include "xfs_bmap_btree.h" |
a844f451 | 32 | #include "xfs_alloc_btree.h" |
1da177e4 | 33 | #include "xfs_ialloc_btree.h" |
1da177e4 | 34 | #include "xfs_dir2_sf.h" |
a844f451 | 35 | #include "xfs_attr_sf.h" |
1da177e4 LT |
36 | #include "xfs_dinode.h" |
37 | #include "xfs_inode.h" | |
a844f451 NS |
38 | #include "xfs_btree.h" |
39 | #include "xfs_ialloc.h" | |
1da177e4 | 40 | #include "xfs_bmap.h" |
1da177e4 LT |
41 | #include "xfs_rtalloc.h" |
42 | #include "xfs_error.h" | |
43 | #include "xfs_itable.h" | |
44 | #include "xfs_rw.h" | |
45 | #include "xfs_acl.h" | |
46 | #include "xfs_cap.h" | |
47 | #include "xfs_mac.h" | |
48 | #include "xfs_attr.h" | |
49 | #include "xfs_buf_item.h" | |
50 | #include "xfs_utils.h" | |
51 | #include "xfs_version.h" | |
1da177e4 LT |
52 | |
53 | #include <linux/namei.h> | |
54 | #include <linux/init.h> | |
55 | #include <linux/mount.h> | |
0829c360 | 56 | #include <linux/mempool.h> |
1da177e4 | 57 | #include <linux/writeback.h> |
4df08c52 | 58 | #include <linux/kthread.h> |
1da177e4 | 59 | |
a50cd269 NS |
60 | STATIC struct quotactl_ops xfs_quotactl_operations; |
61 | STATIC struct super_operations xfs_super_operations; | |
0829c360 CH |
62 | STATIC kmem_zone_t *xfs_vnode_zone; |
63 | STATIC kmem_zone_t *xfs_ioend_zone; | |
64 | mempool_t *xfs_ioend_pool; | |
1da177e4 LT |
65 | |
66 | STATIC struct xfs_mount_args * | |
67 | xfs_args_allocate( | |
764d1f89 NS |
68 | struct super_block *sb, |
69 | int silent) | |
1da177e4 LT |
70 | { |
71 | struct xfs_mount_args *args; | |
72 | ||
73 | args = kmem_zalloc(sizeof(struct xfs_mount_args), KM_SLEEP); | |
74 | args->logbufs = args->logbufsize = -1; | |
75 | strncpy(args->fsname, sb->s_id, MAXNAMELEN); | |
76 | ||
77 | /* Copy the already-parsed mount(2) flags we're interested in */ | |
1da177e4 LT |
78 | if (sb->s_flags & MS_DIRSYNC) |
79 | args->flags |= XFSMNT_DIRSYNC; | |
80 | if (sb->s_flags & MS_SYNCHRONOUS) | |
81 | args->flags |= XFSMNT_WSYNC; | |
764d1f89 NS |
82 | if (silent) |
83 | args->flags |= XFSMNT_QUIET; | |
1da177e4 LT |
84 | args->flags |= XFSMNT_32BITINODES; |
85 | ||
86 | return args; | |
87 | } | |
88 | ||
89 | __uint64_t | |
90 | xfs_max_file_offset( | |
91 | unsigned int blockshift) | |
92 | { | |
93 | unsigned int pagefactor = 1; | |
94 | unsigned int bitshift = BITS_PER_LONG - 1; | |
95 | ||
96 | /* Figure out maximum filesize, on Linux this can depend on | |
97 | * the filesystem blocksize (on 32 bit platforms). | |
98 | * __block_prepare_write does this in an [unsigned] long... | |
99 | * page->index << (PAGE_CACHE_SHIFT - bbits) | |
100 | * So, for page sized blocks (4K on 32 bit platforms), | |
101 | * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is | |
102 | * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1) | |
103 | * but for smaller blocksizes it is less (bbits = log2 bsize). | |
104 | * Note1: get_block_t takes a long (implicit cast from above) | |
105 | * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch | |
106 | * can optionally convert the [unsigned] long from above into | |
107 | * an [unsigned] long long. | |
108 | */ | |
109 | ||
110 | #if BITS_PER_LONG == 32 | |
111 | # if defined(CONFIG_LBD) | |
112 | ASSERT(sizeof(sector_t) == 8); | |
113 | pagefactor = PAGE_CACHE_SIZE; | |
114 | bitshift = BITS_PER_LONG; | |
115 | # else | |
116 | pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift); | |
117 | # endif | |
118 | #endif | |
119 | ||
120 | return (((__uint64_t)pagefactor) << bitshift) - 1; | |
121 | } | |
122 | ||
123 | STATIC __inline__ void | |
124 | xfs_set_inodeops( | |
125 | struct inode *inode) | |
126 | { | |
0432dab2 CH |
127 | switch (inode->i_mode & S_IFMT) { |
128 | case S_IFREG: | |
416c6d5b | 129 | inode->i_op = &xfs_inode_operations; |
3562fd45 | 130 | inode->i_fop = &xfs_file_operations; |
e4c573bb | 131 | inode->i_mapping->a_ops = &xfs_address_space_operations; |
0432dab2 CH |
132 | break; |
133 | case S_IFDIR: | |
416c6d5b | 134 | inode->i_op = &xfs_dir_inode_operations; |
3562fd45 | 135 | inode->i_fop = &xfs_dir_file_operations; |
0432dab2 CH |
136 | break; |
137 | case S_IFLNK: | |
416c6d5b | 138 | inode->i_op = &xfs_symlink_inode_operations; |
1da177e4 | 139 | if (inode->i_blocks) |
e4c573bb | 140 | inode->i_mapping->a_ops = &xfs_address_space_operations; |
0432dab2 CH |
141 | break; |
142 | default: | |
416c6d5b | 143 | inode->i_op = &xfs_inode_operations; |
1da177e4 | 144 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
0432dab2 | 145 | break; |
1da177e4 LT |
146 | } |
147 | } | |
148 | ||
149 | STATIC __inline__ void | |
150 | xfs_revalidate_inode( | |
151 | xfs_mount_t *mp, | |
67fcaa73 | 152 | bhv_vnode_t *vp, |
1da177e4 LT |
153 | xfs_inode_t *ip) |
154 | { | |
ec86dc02 | 155 | struct inode *inode = vn_to_inode(vp); |
1da177e4 | 156 | |
0432dab2 | 157 | inode->i_mode = ip->i_d.di_mode; |
1da177e4 LT |
158 | inode->i_nlink = ip->i_d.di_nlink; |
159 | inode->i_uid = ip->i_d.di_uid; | |
160 | inode->i_gid = ip->i_d.di_gid; | |
0432dab2 CH |
161 | |
162 | switch (inode->i_mode & S_IFMT) { | |
163 | case S_IFBLK: | |
164 | case S_IFCHR: | |
165 | inode->i_rdev = | |
166 | MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff, | |
167 | sysv_minor(ip->i_df.if_u2.if_rdev)); | |
168 | break; | |
169 | default: | |
1da177e4 | 170 | inode->i_rdev = 0; |
0432dab2 | 171 | break; |
1da177e4 | 172 | } |
0432dab2 | 173 | |
e8c8b3a7 | 174 | inode->i_blksize = xfs_preferred_iosize(mp); |
1da177e4 LT |
175 | inode->i_generation = ip->i_d.di_gen; |
176 | i_size_write(inode, ip->i_d.di_size); | |
177 | inode->i_blocks = | |
178 | XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks); | |
179 | inode->i_atime.tv_sec = ip->i_d.di_atime.t_sec; | |
180 | inode->i_atime.tv_nsec = ip->i_d.di_atime.t_nsec; | |
181 | inode->i_mtime.tv_sec = ip->i_d.di_mtime.t_sec; | |
182 | inode->i_mtime.tv_nsec = ip->i_d.di_mtime.t_nsec; | |
183 | inode->i_ctime.tv_sec = ip->i_d.di_ctime.t_sec; | |
184 | inode->i_ctime.tv_nsec = ip->i_d.di_ctime.t_nsec; | |
185 | if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE) | |
186 | inode->i_flags |= S_IMMUTABLE; | |
187 | else | |
188 | inode->i_flags &= ~S_IMMUTABLE; | |
189 | if (ip->i_d.di_flags & XFS_DIFLAG_APPEND) | |
190 | inode->i_flags |= S_APPEND; | |
191 | else | |
192 | inode->i_flags &= ~S_APPEND; | |
193 | if (ip->i_d.di_flags & XFS_DIFLAG_SYNC) | |
194 | inode->i_flags |= S_SYNC; | |
195 | else | |
196 | inode->i_flags &= ~S_SYNC; | |
197 | if (ip->i_d.di_flags & XFS_DIFLAG_NOATIME) | |
198 | inode->i_flags |= S_NOATIME; | |
199 | else | |
200 | inode->i_flags &= ~S_NOATIME; | |
201 | vp->v_flag &= ~VMODIFIED; | |
202 | } | |
203 | ||
204 | void | |
205 | xfs_initialize_vnode( | |
206 | bhv_desc_t *bdp, | |
67fcaa73 | 207 | bhv_vnode_t *vp, |
1da177e4 LT |
208 | bhv_desc_t *inode_bhv, |
209 | int unlock) | |
210 | { | |
211 | xfs_inode_t *ip = XFS_BHVTOI(inode_bhv); | |
ec86dc02 | 212 | struct inode *inode = vn_to_inode(vp); |
1da177e4 LT |
213 | |
214 | if (!inode_bhv->bd_vobj) { | |
215 | vp->v_vfsp = bhvtovfs(bdp); | |
216 | bhv_desc_init(inode_bhv, ip, vp, &xfs_vnodeops); | |
217 | bhv_insert(VN_BHV_HEAD(vp), inode_bhv); | |
218 | } | |
219 | ||
220 | /* | |
221 | * We need to set the ops vectors, and unlock the inode, but if | |
222 | * we have been called during the new inode create process, it is | |
223 | * too early to fill in the Linux inode. We will get called a | |
224 | * second time once the inode is properly set up, and then we can | |
225 | * finish our work. | |
226 | */ | |
227 | if (ip->i_d.di_mode != 0 && unlock && (inode->i_state & I_NEW)) { | |
1da177e4 LT |
228 | xfs_revalidate_inode(XFS_BHVTOM(bdp), vp, ip); |
229 | xfs_set_inodeops(inode); | |
ec86dc02 | 230 | |
1da177e4 LT |
231 | ip->i_flags &= ~XFS_INEW; |
232 | barrier(); | |
233 | ||
234 | unlock_new_inode(inode); | |
235 | } | |
236 | } | |
237 | ||
238 | int | |
239 | xfs_blkdev_get( | |
240 | xfs_mount_t *mp, | |
241 | const char *name, | |
242 | struct block_device **bdevp) | |
243 | { | |
244 | int error = 0; | |
245 | ||
246 | *bdevp = open_bdev_excl(name, 0, mp); | |
247 | if (IS_ERR(*bdevp)) { | |
248 | error = PTR_ERR(*bdevp); | |
249 | printk("XFS: Invalid device [%s], error=%d\n", name, error); | |
250 | } | |
251 | ||
252 | return -error; | |
253 | } | |
254 | ||
255 | void | |
256 | xfs_blkdev_put( | |
257 | struct block_device *bdev) | |
258 | { | |
259 | if (bdev) | |
260 | close_bdev_excl(bdev); | |
261 | } | |
262 | ||
f538d4da CH |
263 | /* |
264 | * Try to write out the superblock using barriers. | |
265 | */ | |
266 | STATIC int | |
267 | xfs_barrier_test( | |
268 | xfs_mount_t *mp) | |
269 | { | |
270 | xfs_buf_t *sbp = xfs_getsb(mp, 0); | |
271 | int error; | |
272 | ||
273 | XFS_BUF_UNDONE(sbp); | |
274 | XFS_BUF_UNREAD(sbp); | |
275 | XFS_BUF_UNDELAYWRITE(sbp); | |
276 | XFS_BUF_WRITE(sbp); | |
277 | XFS_BUF_UNASYNC(sbp); | |
278 | XFS_BUF_ORDERED(sbp); | |
279 | ||
280 | xfsbdstrat(mp, sbp); | |
281 | error = xfs_iowait(sbp); | |
282 | ||
283 | /* | |
284 | * Clear all the flags we set and possible error state in the | |
285 | * buffer. We only did the write to try out whether barriers | |
286 | * worked and shouldn't leave any traces in the superblock | |
287 | * buffer. | |
288 | */ | |
289 | XFS_BUF_DONE(sbp); | |
290 | XFS_BUF_ERROR(sbp, 0); | |
291 | XFS_BUF_UNORDERED(sbp); | |
292 | ||
293 | xfs_buf_relse(sbp); | |
294 | return error; | |
295 | } | |
296 | ||
297 | void | |
298 | xfs_mountfs_check_barriers(xfs_mount_t *mp) | |
299 | { | |
300 | int error; | |
301 | ||
302 | if (mp->m_logdev_targp != mp->m_ddev_targp) { | |
303 | xfs_fs_cmn_err(CE_NOTE, mp, | |
304 | "Disabling barriers, not supported with external log device"); | |
305 | mp->m_flags &= ~XFS_MOUNT_BARRIER; | |
4ef19ddd | 306 | return; |
f538d4da CH |
307 | } |
308 | ||
ce8e922c | 309 | if (mp->m_ddev_targp->bt_bdev->bd_disk->queue->ordered == |
f538d4da CH |
310 | QUEUE_ORDERED_NONE) { |
311 | xfs_fs_cmn_err(CE_NOTE, mp, | |
312 | "Disabling barriers, not supported by the underlying device"); | |
313 | mp->m_flags &= ~XFS_MOUNT_BARRIER; | |
4ef19ddd | 314 | return; |
f538d4da CH |
315 | } |
316 | ||
317 | error = xfs_barrier_test(mp); | |
318 | if (error) { | |
319 | xfs_fs_cmn_err(CE_NOTE, mp, | |
320 | "Disabling barriers, trial barrier write failed"); | |
321 | mp->m_flags &= ~XFS_MOUNT_BARRIER; | |
4ef19ddd | 322 | return; |
f538d4da CH |
323 | } |
324 | } | |
325 | ||
326 | void | |
327 | xfs_blkdev_issue_flush( | |
328 | xfs_buftarg_t *buftarg) | |
329 | { | |
ce8e922c | 330 | blkdev_issue_flush(buftarg->bt_bdev, NULL); |
f538d4da | 331 | } |
1da177e4 LT |
332 | |
333 | STATIC struct inode * | |
a50cd269 | 334 | xfs_fs_alloc_inode( |
1da177e4 LT |
335 | struct super_block *sb) |
336 | { | |
67fcaa73 | 337 | bhv_vnode_t *vp; |
1da177e4 | 338 | |
8758280f NS |
339 | vp = kmem_zone_alloc(xfs_vnode_zone, KM_SLEEP); |
340 | if (unlikely(!vp)) | |
1da177e4 | 341 | return NULL; |
ec86dc02 | 342 | return vn_to_inode(vp); |
1da177e4 LT |
343 | } |
344 | ||
345 | STATIC void | |
a50cd269 | 346 | xfs_fs_destroy_inode( |
1da177e4 LT |
347 | struct inode *inode) |
348 | { | |
ec86dc02 | 349 | kmem_zone_free(xfs_vnode_zone, vn_from_inode(inode)); |
1da177e4 LT |
350 | } |
351 | ||
352 | STATIC void | |
a50cd269 | 353 | xfs_fs_inode_init_once( |
8758280f NS |
354 | void *vnode, |
355 | kmem_zone_t *zonep, | |
1da177e4 LT |
356 | unsigned long flags) |
357 | { | |
1da177e4 | 358 | if ((flags & (SLAB_CTOR_VERIFY|SLAB_CTOR_CONSTRUCTOR)) == |
8758280f | 359 | SLAB_CTOR_CONSTRUCTOR) |
67fcaa73 | 360 | inode_init_once(vn_to_inode((bhv_vnode_t *)vnode)); |
1da177e4 LT |
361 | } |
362 | ||
363 | STATIC int | |
8758280f | 364 | xfs_init_zones(void) |
1da177e4 | 365 | { |
67fcaa73 | 366 | xfs_vnode_zone = kmem_zone_init_flags(sizeof(bhv_vnode_t), "xfs_vnode", |
e0cc2325 NS |
367 | KM_ZONE_HWALIGN | KM_ZONE_RECLAIM | |
368 | KM_ZONE_SPREAD, | |
a50cd269 | 369 | xfs_fs_inode_init_once); |
0829c360 CH |
370 | if (!xfs_vnode_zone) |
371 | goto out; | |
372 | ||
373 | xfs_ioend_zone = kmem_zone_init(sizeof(xfs_ioend_t), "xfs_ioend"); | |
374 | if (!xfs_ioend_zone) | |
375 | goto out_destroy_vnode_zone; | |
376 | ||
93d2341c MD |
377 | xfs_ioend_pool = mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE, |
378 | xfs_ioend_zone); | |
0829c360 CH |
379 | if (!xfs_ioend_pool) |
380 | goto out_free_ioend_zone; | |
1da177e4 | 381 | return 0; |
0829c360 | 382 | |
0829c360 CH |
383 | out_free_ioend_zone: |
384 | kmem_zone_destroy(xfs_ioend_zone); | |
385 | out_destroy_vnode_zone: | |
386 | kmem_zone_destroy(xfs_vnode_zone); | |
387 | out: | |
388 | return -ENOMEM; | |
1da177e4 LT |
389 | } |
390 | ||
391 | STATIC void | |
8758280f | 392 | xfs_destroy_zones(void) |
1da177e4 | 393 | { |
0829c360 CH |
394 | mempool_destroy(xfs_ioend_pool); |
395 | kmem_zone_destroy(xfs_vnode_zone); | |
396 | kmem_zone_destroy(xfs_ioend_zone); | |
1da177e4 LT |
397 | } |
398 | ||
399 | /* | |
400 | * Attempt to flush the inode, this will actually fail | |
401 | * if the inode is pinned, but we dirty the inode again | |
402 | * at the point when it is unpinned after a log write, | |
8758280f | 403 | * since this is when the inode itself becomes flushable. |
1da177e4 LT |
404 | */ |
405 | STATIC int | |
a50cd269 | 406 | xfs_fs_write_inode( |
1da177e4 LT |
407 | struct inode *inode, |
408 | int sync) | |
409 | { | |
67fcaa73 | 410 | bhv_vnode_t *vp = vn_from_inode(inode); |
1da177e4 LT |
411 | int error = 0, flags = FLUSH_INODE; |
412 | ||
413 | if (vp) { | |
414 | vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address); | |
415 | if (sync) | |
416 | flags |= FLUSH_SYNC; | |
67fcaa73 NS |
417 | error = bhv_vop_iflush(vp, flags); |
418 | if (error == EAGAIN) | |
419 | error = sync? bhv_vop_iflush(vp, flags | FLUSH_LOG) : 0; | |
1da177e4 | 420 | } |
1da177e4 LT |
421 | return -error; |
422 | } | |
423 | ||
424 | STATIC void | |
a50cd269 | 425 | xfs_fs_clear_inode( |
1da177e4 LT |
426 | struct inode *inode) |
427 | { | |
67fcaa73 | 428 | bhv_vnode_t *vp = vn_from_inode(inode); |
1da177e4 | 429 | |
a50cd269 | 430 | vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address); |
56d433e4 | 431 | |
56d433e4 CH |
432 | XFS_STATS_INC(vn_rele); |
433 | XFS_STATS_INC(vn_remove); | |
434 | XFS_STATS_INC(vn_reclaim); | |
435 | XFS_STATS_DEC(vn_active); | |
436 | ||
02ba71de CH |
437 | /* |
438 | * This can happen because xfs_iget_core calls xfs_idestroy if we | |
439 | * find an inode with di_mode == 0 but without IGET_CREATE set. | |
440 | */ | |
67fcaa73 NS |
441 | if (VNHEAD(vp)) |
442 | bhv_vop_inactive(vp, NULL); | |
1da177e4 | 443 | |
56d433e4 CH |
444 | VN_LOCK(vp); |
445 | vp->v_flag &= ~VMODIFIED; | |
446 | VN_UNLOCK(vp, 0); | |
447 | ||
67fcaa73 NS |
448 | if (VNHEAD(vp)) |
449 | if (bhv_vop_reclaim(vp)) | |
450 | panic("%s: cannot reclaim 0x%p\n", __FUNCTION__, vp); | |
56d433e4 | 451 | |
67fcaa73 | 452 | ASSERT(VNHEAD(vp) == NULL); |
56d433e4 CH |
453 | |
454 | #ifdef XFS_VNODE_TRACE | |
455 | ktrace_free(vp->v_trace); | |
456 | #endif | |
457 | } | |
1da177e4 LT |
458 | |
459 | /* | |
460 | * Enqueue a work item to be picked up by the vfs xfssyncd thread. | |
461 | * Doing this has two advantages: | |
462 | * - It saves on stack space, which is tight in certain situations | |
463 | * - It can be used (with care) as a mechanism to avoid deadlocks. | |
464 | * Flushing while allocating in a full filesystem requires both. | |
465 | */ | |
466 | STATIC void | |
467 | xfs_syncd_queue_work( | |
b83bd138 | 468 | struct bhv_vfs *vfs, |
1da177e4 | 469 | void *data, |
b83bd138 | 470 | void (*syncer)(bhv_vfs_t *, void *)) |
1da177e4 | 471 | { |
b83bd138 | 472 | struct bhv_vfs_sync_work *work; |
1da177e4 | 473 | |
b83bd138 | 474 | work = kmem_alloc(sizeof(struct bhv_vfs_sync_work), KM_SLEEP); |
1da177e4 LT |
475 | INIT_LIST_HEAD(&work->w_list); |
476 | work->w_syncer = syncer; | |
477 | work->w_data = data; | |
478 | work->w_vfs = vfs; | |
479 | spin_lock(&vfs->vfs_sync_lock); | |
480 | list_add_tail(&work->w_list, &vfs->vfs_sync_list); | |
481 | spin_unlock(&vfs->vfs_sync_lock); | |
482 | wake_up_process(vfs->vfs_sync_task); | |
483 | } | |
484 | ||
485 | /* | |
486 | * Flush delayed allocate data, attempting to free up reserved space | |
487 | * from existing allocations. At this point a new allocation attempt | |
488 | * has failed with ENOSPC and we are in the process of scratching our | |
489 | * heads, looking about for more room... | |
490 | */ | |
491 | STATIC void | |
492 | xfs_flush_inode_work( | |
b83bd138 | 493 | bhv_vfs_t *vfs, |
1da177e4 LT |
494 | void *inode) |
495 | { | |
496 | filemap_flush(((struct inode *)inode)->i_mapping); | |
497 | iput((struct inode *)inode); | |
498 | } | |
499 | ||
500 | void | |
501 | xfs_flush_inode( | |
502 | xfs_inode_t *ip) | |
503 | { | |
ec86dc02 | 504 | struct inode *inode = vn_to_inode(XFS_ITOV(ip)); |
b83bd138 | 505 | struct bhv_vfs *vfs = XFS_MTOVFS(ip->i_mount); |
1da177e4 LT |
506 | |
507 | igrab(inode); | |
508 | xfs_syncd_queue_work(vfs, inode, xfs_flush_inode_work); | |
041e0e3b | 509 | delay(msecs_to_jiffies(500)); |
1da177e4 LT |
510 | } |
511 | ||
512 | /* | |
513 | * This is the "bigger hammer" version of xfs_flush_inode_work... | |
514 | * (IOW, "If at first you don't succeed, use a Bigger Hammer"). | |
515 | */ | |
516 | STATIC void | |
517 | xfs_flush_device_work( | |
b83bd138 | 518 | bhv_vfs_t *vfs, |
1da177e4 LT |
519 | void *inode) |
520 | { | |
521 | sync_blockdev(vfs->vfs_super->s_bdev); | |
522 | iput((struct inode *)inode); | |
523 | } | |
524 | ||
525 | void | |
526 | xfs_flush_device( | |
527 | xfs_inode_t *ip) | |
528 | { | |
ec86dc02 | 529 | struct inode *inode = vn_to_inode(XFS_ITOV(ip)); |
b83bd138 | 530 | struct bhv_vfs *vfs = XFS_MTOVFS(ip->i_mount); |
1da177e4 LT |
531 | |
532 | igrab(inode); | |
533 | xfs_syncd_queue_work(vfs, inode, xfs_flush_device_work); | |
041e0e3b | 534 | delay(msecs_to_jiffies(500)); |
1da177e4 LT |
535 | xfs_log_force(ip->i_mount, (xfs_lsn_t)0, XFS_LOG_FORCE|XFS_LOG_SYNC); |
536 | } | |
537 | ||
1da177e4 LT |
538 | STATIC void |
539 | vfs_sync_worker( | |
b83bd138 | 540 | bhv_vfs_t *vfsp, |
1da177e4 LT |
541 | void *unused) |
542 | { | |
543 | int error; | |
544 | ||
545 | if (!(vfsp->vfs_flag & VFS_RDONLY)) | |
b83bd138 NS |
546 | error = bhv_vfs_sync(vfsp, SYNC_FSDATA | SYNC_BDFLUSH | \ |
547 | SYNC_ATTR | SYNC_REFCACHE, NULL); | |
1da177e4 LT |
548 | vfsp->vfs_sync_seq++; |
549 | wmb(); | |
550 | wake_up(&vfsp->vfs_wait_single_sync_task); | |
551 | } | |
552 | ||
553 | STATIC int | |
554 | xfssyncd( | |
555 | void *arg) | |
556 | { | |
557 | long timeleft; | |
b83bd138 NS |
558 | bhv_vfs_t *vfsp = (bhv_vfs_t *) arg; |
559 | bhv_vfs_sync_work_t *work, *n; | |
4df08c52 | 560 | LIST_HEAD (tmp); |
1da177e4 | 561 | |
041e0e3b | 562 | timeleft = xfs_syncd_centisecs * msecs_to_jiffies(10); |
1da177e4 | 563 | for (;;) { |
041e0e3b | 564 | timeleft = schedule_timeout_interruptible(timeleft); |
1da177e4 | 565 | /* swsusp */ |
3e1d1d28 | 566 | try_to_freeze(); |
71df099d | 567 | if (kthread_should_stop() && list_empty(&vfsp->vfs_sync_list)) |
1da177e4 LT |
568 | break; |
569 | ||
570 | spin_lock(&vfsp->vfs_sync_lock); | |
571 | /* | |
572 | * We can get woken by laptop mode, to do a sync - | |
573 | * that's the (only!) case where the list would be | |
574 | * empty with time remaining. | |
575 | */ | |
576 | if (!timeleft || list_empty(&vfsp->vfs_sync_list)) { | |
577 | if (!timeleft) | |
041e0e3b NA |
578 | timeleft = xfs_syncd_centisecs * |
579 | msecs_to_jiffies(10); | |
1da177e4 LT |
580 | INIT_LIST_HEAD(&vfsp->vfs_sync_work.w_list); |
581 | list_add_tail(&vfsp->vfs_sync_work.w_list, | |
582 | &vfsp->vfs_sync_list); | |
583 | } | |
584 | list_for_each_entry_safe(work, n, &vfsp->vfs_sync_list, w_list) | |
585 | list_move(&work->w_list, &tmp); | |
586 | spin_unlock(&vfsp->vfs_sync_lock); | |
587 | ||
588 | list_for_each_entry_safe(work, n, &tmp, w_list) { | |
589 | (*work->w_syncer)(vfsp, work->w_data); | |
590 | list_del(&work->w_list); | |
591 | if (work == &vfsp->vfs_sync_work) | |
592 | continue; | |
b83bd138 | 593 | kmem_free(work, sizeof(struct bhv_vfs_sync_work)); |
1da177e4 LT |
594 | } |
595 | } | |
596 | ||
1da177e4 LT |
597 | return 0; |
598 | } | |
599 | ||
600 | STATIC int | |
a50cd269 | 601 | xfs_fs_start_syncd( |
b83bd138 | 602 | bhv_vfs_t *vfsp) |
1da177e4 | 603 | { |
4df08c52 CH |
604 | vfsp->vfs_sync_work.w_syncer = vfs_sync_worker; |
605 | vfsp->vfs_sync_work.w_vfs = vfsp; | |
606 | vfsp->vfs_sync_task = kthread_run(xfssyncd, vfsp, "xfssyncd"); | |
607 | if (IS_ERR(vfsp->vfs_sync_task)) | |
608 | return -PTR_ERR(vfsp->vfs_sync_task); | |
1da177e4 LT |
609 | return 0; |
610 | } | |
611 | ||
612 | STATIC void | |
a50cd269 | 613 | xfs_fs_stop_syncd( |
b83bd138 | 614 | bhv_vfs_t *vfsp) |
1da177e4 | 615 | { |
4df08c52 | 616 | kthread_stop(vfsp->vfs_sync_task); |
1da177e4 LT |
617 | } |
618 | ||
619 | STATIC void | |
a50cd269 | 620 | xfs_fs_put_super( |
1da177e4 LT |
621 | struct super_block *sb) |
622 | { | |
b83bd138 | 623 | bhv_vfs_t *vfsp = vfs_from_sb(sb); |
1da177e4 LT |
624 | int error; |
625 | ||
a50cd269 | 626 | xfs_fs_stop_syncd(vfsp); |
b83bd138 NS |
627 | bhv_vfs_sync(vfsp, SYNC_ATTR | SYNC_DELWRI, NULL); |
628 | error = bhv_vfs_unmount(vfsp, 0, NULL); | |
1da177e4 | 629 | if (error) { |
b83bd138 NS |
630 | printk("XFS: unmount got error=%d\n", error); |
631 | printk("%s: vfs=0x%p left dangling!\n", __FUNCTION__, vfsp); | |
632 | } else { | |
633 | vfs_deallocate(vfsp); | |
1da177e4 | 634 | } |
1da177e4 LT |
635 | } |
636 | ||
637 | STATIC void | |
a50cd269 | 638 | xfs_fs_write_super( |
1da177e4 LT |
639 | struct super_block *sb) |
640 | { | |
b83bd138 NS |
641 | if (!(sb->s_flags & MS_RDONLY)) |
642 | bhv_vfs_sync(vfs_from_sb(sb), SYNC_FSDATA, NULL); | |
1da177e4 LT |
643 | sb->s_dirt = 0; |
644 | } | |
645 | ||
646 | STATIC int | |
a50cd269 | 647 | xfs_fs_sync_super( |
1da177e4 LT |
648 | struct super_block *sb, |
649 | int wait) | |
650 | { | |
b83bd138 NS |
651 | bhv_vfs_t *vfsp = vfs_from_sb(sb); |
652 | int error; | |
653 | int flags; | |
1da177e4 | 654 | |
f898d6c0 CH |
655 | if (unlikely(sb->s_frozen == SB_FREEZE_WRITE)) |
656 | flags = SYNC_QUIESCE; | |
657 | else | |
658 | flags = SYNC_FSDATA | (wait ? SYNC_WAIT : 0); | |
1da177e4 | 659 | |
b83bd138 | 660 | error = bhv_vfs_sync(vfsp, flags, NULL); |
1da177e4 LT |
661 | sb->s_dirt = 0; |
662 | ||
663 | if (unlikely(laptop_mode)) { | |
664 | int prev_sync_seq = vfsp->vfs_sync_seq; | |
665 | ||
666 | /* | |
667 | * The disk must be active because we're syncing. | |
668 | * We schedule xfssyncd now (now that the disk is | |
669 | * active) instead of later (when it might not be). | |
670 | */ | |
671 | wake_up_process(vfsp->vfs_sync_task); | |
672 | /* | |
673 | * We have to wait for the sync iteration to complete. | |
674 | * If we don't, the disk activity caused by the sync | |
675 | * will come after the sync is completed, and that | |
676 | * triggers another sync from laptop mode. | |
677 | */ | |
678 | wait_event(vfsp->vfs_wait_single_sync_task, | |
679 | vfsp->vfs_sync_seq != prev_sync_seq); | |
680 | } | |
681 | ||
682 | return -error; | |
683 | } | |
684 | ||
685 | STATIC int | |
a50cd269 | 686 | xfs_fs_statfs( |
726c3342 | 687 | struct dentry *dentry, |
1da177e4 LT |
688 | struct kstatfs *statp) |
689 | { | |
726c3342 | 690 | return -bhv_vfs_statvfs(vfs_from_sb(dentry->d_sb), statp, NULL); |
1da177e4 LT |
691 | } |
692 | ||
693 | STATIC int | |
a50cd269 | 694 | xfs_fs_remount( |
1da177e4 LT |
695 | struct super_block *sb, |
696 | int *flags, | |
697 | char *options) | |
698 | { | |
b83bd138 | 699 | bhv_vfs_t *vfsp = vfs_from_sb(sb); |
764d1f89 | 700 | struct xfs_mount_args *args = xfs_args_allocate(sb, 0); |
1da177e4 LT |
701 | int error; |
702 | ||
b83bd138 | 703 | error = bhv_vfs_parseargs(vfsp, options, args, 1); |
1da177e4 | 704 | if (!error) |
b83bd138 | 705 | error = bhv_vfs_mntupdate(vfsp, flags, args); |
1da177e4 LT |
706 | kmem_free(args, sizeof(*args)); |
707 | return -error; | |
708 | } | |
709 | ||
710 | STATIC void | |
a50cd269 | 711 | xfs_fs_lockfs( |
1da177e4 LT |
712 | struct super_block *sb) |
713 | { | |
b83bd138 | 714 | bhv_vfs_freeze(vfs_from_sb(sb)); |
1da177e4 LT |
715 | } |
716 | ||
717 | STATIC int | |
a50cd269 | 718 | xfs_fs_show_options( |
1da177e4 LT |
719 | struct seq_file *m, |
720 | struct vfsmount *mnt) | |
721 | { | |
b83bd138 | 722 | return -bhv_vfs_showargs(vfs_from_sb(mnt->mnt_sb), m); |
1da177e4 LT |
723 | } |
724 | ||
ee34807a | 725 | STATIC int |
a50cd269 | 726 | xfs_fs_quotasync( |
ee34807a NS |
727 | struct super_block *sb, |
728 | int type) | |
729 | { | |
b83bd138 | 730 | return -bhv_vfs_quotactl(vfs_from_sb(sb), Q_XQUOTASYNC, 0, NULL); |
ee34807a NS |
731 | } |
732 | ||
1da177e4 | 733 | STATIC int |
a50cd269 | 734 | xfs_fs_getxstate( |
1da177e4 LT |
735 | struct super_block *sb, |
736 | struct fs_quota_stat *fqs) | |
737 | { | |
b83bd138 | 738 | return -bhv_vfs_quotactl(vfs_from_sb(sb), Q_XGETQSTAT, 0, (caddr_t)fqs); |
1da177e4 LT |
739 | } |
740 | ||
741 | STATIC int | |
a50cd269 | 742 | xfs_fs_setxstate( |
1da177e4 LT |
743 | struct super_block *sb, |
744 | unsigned int flags, | |
745 | int op) | |
746 | { | |
b83bd138 | 747 | return -bhv_vfs_quotactl(vfs_from_sb(sb), op, 0, (caddr_t)&flags); |
1da177e4 LT |
748 | } |
749 | ||
750 | STATIC int | |
a50cd269 | 751 | xfs_fs_getxquota( |
1da177e4 LT |
752 | struct super_block *sb, |
753 | int type, | |
754 | qid_t id, | |
755 | struct fs_disk_quota *fdq) | |
756 | { | |
b83bd138 NS |
757 | return -bhv_vfs_quotactl(vfs_from_sb(sb), |
758 | (type == USRQUOTA) ? Q_XGETQUOTA : | |
759 | ((type == GRPQUOTA) ? Q_XGETGQUOTA : | |
760 | Q_XGETPQUOTA), id, (caddr_t)fdq); | |
1da177e4 LT |
761 | } |
762 | ||
763 | STATIC int | |
a50cd269 | 764 | xfs_fs_setxquota( |
1da177e4 LT |
765 | struct super_block *sb, |
766 | int type, | |
767 | qid_t id, | |
768 | struct fs_disk_quota *fdq) | |
769 | { | |
b83bd138 NS |
770 | return -bhv_vfs_quotactl(vfs_from_sb(sb), |
771 | (type == USRQUOTA) ? Q_XSETQLIM : | |
772 | ((type == GRPQUOTA) ? Q_XSETGQLIM : | |
773 | Q_XSETPQLIM), id, (caddr_t)fdq); | |
1da177e4 LT |
774 | } |
775 | ||
776 | STATIC int | |
a50cd269 | 777 | xfs_fs_fill_super( |
1da177e4 LT |
778 | struct super_block *sb, |
779 | void *data, | |
780 | int silent) | |
781 | { | |
67fcaa73 | 782 | struct bhv_vnode *rootvp; |
b83bd138 | 783 | struct bhv_vfs *vfsp = vfs_allocate(sb); |
764d1f89 | 784 | struct xfs_mount_args *args = xfs_args_allocate(sb, silent); |
1da177e4 | 785 | struct kstatfs statvfs; |
b83bd138 | 786 | int error; |
1da177e4 | 787 | |
1da177e4 LT |
788 | bhv_insert_all_vfsops(vfsp); |
789 | ||
b83bd138 | 790 | error = bhv_vfs_parseargs(vfsp, (char *)data, args, 0); |
1da177e4 LT |
791 | if (error) { |
792 | bhv_remove_all_vfsops(vfsp, 1); | |
793 | goto fail_vfsop; | |
794 | } | |
795 | ||
796 | sb_min_blocksize(sb, BBSIZE); | |
a50cd269 | 797 | sb->s_export_op = &xfs_export_operations; |
a50cd269 NS |
798 | sb->s_qcop = &xfs_quotactl_operations; |
799 | sb->s_op = &xfs_super_operations; | |
1da177e4 | 800 | |
b83bd138 | 801 | error = bhv_vfs_mount(vfsp, args, NULL); |
1da177e4 LT |
802 | if (error) { |
803 | bhv_remove_all_vfsops(vfsp, 1); | |
804 | goto fail_vfsop; | |
805 | } | |
806 | ||
b83bd138 | 807 | error = bhv_vfs_statvfs(vfsp, &statvfs, NULL); |
1da177e4 LT |
808 | if (error) |
809 | goto fail_unmount; | |
810 | ||
811 | sb->s_dirt = 1; | |
812 | sb->s_magic = statvfs.f_type; | |
813 | sb->s_blocksize = statvfs.f_bsize; | |
814 | sb->s_blocksize_bits = ffs(statvfs.f_bsize) - 1; | |
815 | sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits); | |
816 | sb->s_time_gran = 1; | |
817 | set_posix_acl_flag(sb); | |
818 | ||
b83bd138 | 819 | error = bhv_vfs_root(vfsp, &rootvp); |
1da177e4 LT |
820 | if (error) |
821 | goto fail_unmount; | |
822 | ||
ec86dc02 | 823 | sb->s_root = d_alloc_root(vn_to_inode(rootvp)); |
1da177e4 LT |
824 | if (!sb->s_root) { |
825 | error = ENOMEM; | |
826 | goto fail_vnrele; | |
827 | } | |
828 | if (is_bad_inode(sb->s_root->d_inode)) { | |
829 | error = EINVAL; | |
830 | goto fail_vnrele; | |
831 | } | |
a50cd269 | 832 | if ((error = xfs_fs_start_syncd(vfsp))) |
1da177e4 LT |
833 | goto fail_vnrele; |
834 | vn_trace_exit(rootvp, __FUNCTION__, (inst_t *)__return_address); | |
835 | ||
836 | kmem_free(args, sizeof(*args)); | |
837 | return 0; | |
838 | ||
839 | fail_vnrele: | |
840 | if (sb->s_root) { | |
841 | dput(sb->s_root); | |
842 | sb->s_root = NULL; | |
843 | } else { | |
844 | VN_RELE(rootvp); | |
845 | } | |
846 | ||
847 | fail_unmount: | |
b83bd138 | 848 | bhv_vfs_unmount(vfsp, 0, NULL); |
1da177e4 LT |
849 | |
850 | fail_vfsop: | |
851 | vfs_deallocate(vfsp); | |
852 | kmem_free(args, sizeof(*args)); | |
853 | return -error; | |
854 | } | |
855 | ||
454e2398 | 856 | STATIC int |
a50cd269 | 857 | xfs_fs_get_sb( |
1da177e4 LT |
858 | struct file_system_type *fs_type, |
859 | int flags, | |
860 | const char *dev_name, | |
454e2398 DH |
861 | void *data, |
862 | struct vfsmount *mnt) | |
1da177e4 | 863 | { |
454e2398 DH |
864 | return get_sb_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super, |
865 | mnt); | |
a50cd269 NS |
866 | } |
867 | ||
868 | STATIC struct super_operations xfs_super_operations = { | |
869 | .alloc_inode = xfs_fs_alloc_inode, | |
870 | .destroy_inode = xfs_fs_destroy_inode, | |
871 | .write_inode = xfs_fs_write_inode, | |
872 | .clear_inode = xfs_fs_clear_inode, | |
873 | .put_super = xfs_fs_put_super, | |
874 | .write_super = xfs_fs_write_super, | |
875 | .sync_fs = xfs_fs_sync_super, | |
876 | .write_super_lockfs = xfs_fs_lockfs, | |
877 | .statfs = xfs_fs_statfs, | |
878 | .remount_fs = xfs_fs_remount, | |
879 | .show_options = xfs_fs_show_options, | |
1da177e4 LT |
880 | }; |
881 | ||
a50cd269 NS |
882 | STATIC struct quotactl_ops xfs_quotactl_operations = { |
883 | .quota_sync = xfs_fs_quotasync, | |
884 | .get_xstate = xfs_fs_getxstate, | |
885 | .set_xstate = xfs_fs_setxstate, | |
886 | .get_xquota = xfs_fs_getxquota, | |
887 | .set_xquota = xfs_fs_setxquota, | |
1da177e4 LT |
888 | }; |
889 | ||
890 | STATIC struct file_system_type xfs_fs_type = { | |
891 | .owner = THIS_MODULE, | |
892 | .name = "xfs", | |
a50cd269 | 893 | .get_sb = xfs_fs_get_sb, |
1da177e4 LT |
894 | .kill_sb = kill_block_super, |
895 | .fs_flags = FS_REQUIRES_DEV, | |
896 | }; | |
897 | ||
898 | ||
899 | STATIC int __init | |
900 | init_xfs_fs( void ) | |
901 | { | |
902 | int error; | |
903 | struct sysinfo si; | |
904 | static char message[] __initdata = KERN_INFO \ | |
905 | XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled\n"; | |
906 | ||
907 | printk(message); | |
908 | ||
909 | si_meminfo(&si); | |
910 | xfs_physmem = si.totalram; | |
911 | ||
912 | ktrace_init(64); | |
913 | ||
8758280f | 914 | error = xfs_init_zones(); |
1da177e4 | 915 | if (error < 0) |
0829c360 | 916 | goto undo_zones; |
1da177e4 | 917 | |
ce8e922c | 918 | error = xfs_buf_init(); |
1da177e4 | 919 | if (error < 0) |
ce8e922c | 920 | goto undo_buffers; |
1da177e4 LT |
921 | |
922 | vn_init(); | |
923 | xfs_init(); | |
924 | uuid_init(); | |
925 | vfs_initquota(); | |
926 | ||
927 | error = register_filesystem(&xfs_fs_type); | |
928 | if (error) | |
929 | goto undo_register; | |
1da177e4 LT |
930 | return 0; |
931 | ||
932 | undo_register: | |
ce8e922c | 933 | xfs_buf_terminate(); |
1da177e4 | 934 | |
ce8e922c | 935 | undo_buffers: |
8758280f | 936 | xfs_destroy_zones(); |
1da177e4 | 937 | |
0829c360 | 938 | undo_zones: |
1da177e4 LT |
939 | return error; |
940 | } | |
941 | ||
942 | STATIC void __exit | |
943 | exit_xfs_fs( void ) | |
944 | { | |
945 | vfs_exitquota(); | |
1da177e4 LT |
946 | unregister_filesystem(&xfs_fs_type); |
947 | xfs_cleanup(); | |
ce8e922c | 948 | xfs_buf_terminate(); |
8758280f | 949 | xfs_destroy_zones(); |
1da177e4 LT |
950 | ktrace_uninit(); |
951 | } | |
952 | ||
953 | module_init(init_xfs_fs); | |
954 | module_exit(exit_xfs_fs); | |
955 | ||
956 | MODULE_AUTHOR("Silicon Graphics, Inc."); | |
957 | MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled"); | |
958 | MODULE_LICENSE("GPL"); |