Commit | Line | Data |
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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" | |
1da177e4 LT |
46 | #include "xfs_attr.h" |
47 | #include "xfs_buf_item.h" | |
48 | #include "xfs_utils.h" | |
739bfb2a | 49 | #include "xfs_vnodeops.h" |
1da177e4 | 50 | #include "xfs_version.h" |
1da177e4 LT |
51 | |
52 | #include <linux/namei.h> | |
53 | #include <linux/init.h> | |
54 | #include <linux/mount.h> | |
0829c360 | 55 | #include <linux/mempool.h> |
1da177e4 | 56 | #include <linux/writeback.h> |
4df08c52 | 57 | #include <linux/kthread.h> |
7dfb7103 | 58 | #include <linux/freezer.h> |
1da177e4 | 59 | |
7989cb8e DC |
60 | static struct quotactl_ops xfs_quotactl_operations; |
61 | static struct super_operations xfs_super_operations; | |
62 | static kmem_zone_t *xfs_vnode_zone; | |
63 | static kmem_zone_t *xfs_ioend_zone; | |
0829c360 | 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 | ||
7989cb8e | 123 | STATIC_INLINE void |
1da177e4 LT |
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 | ||
7989cb8e | 149 | STATIC_INLINE void |
1da177e4 LT |
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 | |
1da177e4 LT |
174 | inode->i_generation = ip->i_d.di_gen; |
175 | i_size_write(inode, ip->i_d.di_size); | |
176 | inode->i_blocks = | |
177 | XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks); | |
178 | inode->i_atime.tv_sec = ip->i_d.di_atime.t_sec; | |
179 | inode->i_atime.tv_nsec = ip->i_d.di_atime.t_nsec; | |
180 | inode->i_mtime.tv_sec = ip->i_d.di_mtime.t_sec; | |
181 | inode->i_mtime.tv_nsec = ip->i_d.di_mtime.t_nsec; | |
182 | inode->i_ctime.tv_sec = ip->i_d.di_ctime.t_sec; | |
183 | inode->i_ctime.tv_nsec = ip->i_d.di_ctime.t_nsec; | |
184 | if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE) | |
185 | inode->i_flags |= S_IMMUTABLE; | |
186 | else | |
187 | inode->i_flags &= ~S_IMMUTABLE; | |
188 | if (ip->i_d.di_flags & XFS_DIFLAG_APPEND) | |
189 | inode->i_flags |= S_APPEND; | |
190 | else | |
191 | inode->i_flags &= ~S_APPEND; | |
192 | if (ip->i_d.di_flags & XFS_DIFLAG_SYNC) | |
193 | inode->i_flags |= S_SYNC; | |
194 | else | |
195 | inode->i_flags &= ~S_SYNC; | |
196 | if (ip->i_d.di_flags & XFS_DIFLAG_NOATIME) | |
197 | inode->i_flags |= S_NOATIME; | |
198 | else | |
199 | inode->i_flags &= ~S_NOATIME; | |
b3aea4ed | 200 | xfs_iflags_clear(ip, XFS_IMODIFIED); |
1da177e4 LT |
201 | } |
202 | ||
203 | void | |
204 | xfs_initialize_vnode( | |
205 | bhv_desc_t *bdp, | |
67fcaa73 | 206 | bhv_vnode_t *vp, |
739bfb2a | 207 | struct xfs_inode *ip, |
1da177e4 LT |
208 | int unlock) |
209 | { | |
ec86dc02 | 210 | struct inode *inode = vn_to_inode(vp); |
1da177e4 | 211 | |
739bfb2a | 212 | if (!ip->i_vnode) { |
739bfb2a CH |
213 | ip->i_vnode = vp; |
214 | inode->i_private = ip; | |
1da177e4 LT |
215 | } |
216 | ||
217 | /* | |
218 | * We need to set the ops vectors, and unlock the inode, but if | |
219 | * we have been called during the new inode create process, it is | |
220 | * too early to fill in the Linux inode. We will get called a | |
221 | * second time once the inode is properly set up, and then we can | |
222 | * finish our work. | |
223 | */ | |
224 | if (ip->i_d.di_mode != 0 && unlock && (inode->i_state & I_NEW)) { | |
1da177e4 LT |
225 | xfs_revalidate_inode(XFS_BHVTOM(bdp), vp, ip); |
226 | xfs_set_inodeops(inode); | |
ec86dc02 | 227 | |
7a18c386 | 228 | xfs_iflags_clear(ip, XFS_INEW); |
1da177e4 LT |
229 | barrier(); |
230 | ||
231 | unlock_new_inode(inode); | |
232 | } | |
233 | } | |
234 | ||
235 | int | |
236 | xfs_blkdev_get( | |
237 | xfs_mount_t *mp, | |
238 | const char *name, | |
239 | struct block_device **bdevp) | |
240 | { | |
241 | int error = 0; | |
242 | ||
243 | *bdevp = open_bdev_excl(name, 0, mp); | |
244 | if (IS_ERR(*bdevp)) { | |
245 | error = PTR_ERR(*bdevp); | |
246 | printk("XFS: Invalid device [%s], error=%d\n", name, error); | |
247 | } | |
248 | ||
249 | return -error; | |
250 | } | |
251 | ||
252 | void | |
253 | xfs_blkdev_put( | |
254 | struct block_device *bdev) | |
255 | { | |
256 | if (bdev) | |
257 | close_bdev_excl(bdev); | |
258 | } | |
259 | ||
f538d4da CH |
260 | /* |
261 | * Try to write out the superblock using barriers. | |
262 | */ | |
263 | STATIC int | |
264 | xfs_barrier_test( | |
265 | xfs_mount_t *mp) | |
266 | { | |
267 | xfs_buf_t *sbp = xfs_getsb(mp, 0); | |
268 | int error; | |
269 | ||
270 | XFS_BUF_UNDONE(sbp); | |
271 | XFS_BUF_UNREAD(sbp); | |
272 | XFS_BUF_UNDELAYWRITE(sbp); | |
273 | XFS_BUF_WRITE(sbp); | |
274 | XFS_BUF_UNASYNC(sbp); | |
275 | XFS_BUF_ORDERED(sbp); | |
276 | ||
277 | xfsbdstrat(mp, sbp); | |
278 | error = xfs_iowait(sbp); | |
279 | ||
280 | /* | |
281 | * Clear all the flags we set and possible error state in the | |
282 | * buffer. We only did the write to try out whether barriers | |
283 | * worked and shouldn't leave any traces in the superblock | |
284 | * buffer. | |
285 | */ | |
286 | XFS_BUF_DONE(sbp); | |
287 | XFS_BUF_ERROR(sbp, 0); | |
288 | XFS_BUF_UNORDERED(sbp); | |
289 | ||
290 | xfs_buf_relse(sbp); | |
291 | return error; | |
292 | } | |
293 | ||
294 | void | |
295 | xfs_mountfs_check_barriers(xfs_mount_t *mp) | |
296 | { | |
297 | int error; | |
298 | ||
299 | if (mp->m_logdev_targp != mp->m_ddev_targp) { | |
300 | xfs_fs_cmn_err(CE_NOTE, mp, | |
301 | "Disabling barriers, not supported with external log device"); | |
302 | mp->m_flags &= ~XFS_MOUNT_BARRIER; | |
4ef19ddd | 303 | return; |
f538d4da CH |
304 | } |
305 | ||
b2ea401b NS |
306 | if (xfs_readonly_buftarg(mp->m_ddev_targp)) { |
307 | xfs_fs_cmn_err(CE_NOTE, mp, | |
308 | "Disabling barriers, underlying device is readonly"); | |
309 | mp->m_flags &= ~XFS_MOUNT_BARRIER; | |
310 | return; | |
311 | } | |
312 | ||
f538d4da CH |
313 | error = xfs_barrier_test(mp); |
314 | if (error) { | |
315 | xfs_fs_cmn_err(CE_NOTE, mp, | |
316 | "Disabling barriers, trial barrier write failed"); | |
317 | mp->m_flags &= ~XFS_MOUNT_BARRIER; | |
4ef19ddd | 318 | return; |
f538d4da CH |
319 | } |
320 | } | |
321 | ||
322 | void | |
323 | xfs_blkdev_issue_flush( | |
324 | xfs_buftarg_t *buftarg) | |
325 | { | |
ce8e922c | 326 | blkdev_issue_flush(buftarg->bt_bdev, NULL); |
f538d4da | 327 | } |
1da177e4 LT |
328 | |
329 | STATIC struct inode * | |
a50cd269 | 330 | xfs_fs_alloc_inode( |
1da177e4 LT |
331 | struct super_block *sb) |
332 | { | |
67fcaa73 | 333 | bhv_vnode_t *vp; |
1da177e4 | 334 | |
8758280f NS |
335 | vp = kmem_zone_alloc(xfs_vnode_zone, KM_SLEEP); |
336 | if (unlikely(!vp)) | |
1da177e4 | 337 | return NULL; |
ec86dc02 | 338 | return vn_to_inode(vp); |
1da177e4 LT |
339 | } |
340 | ||
341 | STATIC void | |
a50cd269 | 342 | xfs_fs_destroy_inode( |
1da177e4 LT |
343 | struct inode *inode) |
344 | { | |
ec86dc02 | 345 | kmem_zone_free(xfs_vnode_zone, vn_from_inode(inode)); |
1da177e4 LT |
346 | } |
347 | ||
348 | STATIC void | |
a50cd269 | 349 | xfs_fs_inode_init_once( |
8758280f NS |
350 | void *vnode, |
351 | kmem_zone_t *zonep, | |
1da177e4 LT |
352 | unsigned long flags) |
353 | { | |
a35afb83 | 354 | inode_init_once(vn_to_inode((bhv_vnode_t *)vnode)); |
1da177e4 LT |
355 | } |
356 | ||
357 | STATIC int | |
8758280f | 358 | xfs_init_zones(void) |
1da177e4 | 359 | { |
67fcaa73 | 360 | xfs_vnode_zone = kmem_zone_init_flags(sizeof(bhv_vnode_t), "xfs_vnode", |
e0cc2325 NS |
361 | KM_ZONE_HWALIGN | KM_ZONE_RECLAIM | |
362 | KM_ZONE_SPREAD, | |
a50cd269 | 363 | xfs_fs_inode_init_once); |
0829c360 CH |
364 | if (!xfs_vnode_zone) |
365 | goto out; | |
366 | ||
367 | xfs_ioend_zone = kmem_zone_init(sizeof(xfs_ioend_t), "xfs_ioend"); | |
368 | if (!xfs_ioend_zone) | |
369 | goto out_destroy_vnode_zone; | |
370 | ||
93d2341c MD |
371 | xfs_ioend_pool = mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE, |
372 | xfs_ioend_zone); | |
0829c360 CH |
373 | if (!xfs_ioend_pool) |
374 | goto out_free_ioend_zone; | |
1da177e4 | 375 | return 0; |
0829c360 | 376 | |
0829c360 CH |
377 | out_free_ioend_zone: |
378 | kmem_zone_destroy(xfs_ioend_zone); | |
379 | out_destroy_vnode_zone: | |
380 | kmem_zone_destroy(xfs_vnode_zone); | |
381 | out: | |
382 | return -ENOMEM; | |
1da177e4 LT |
383 | } |
384 | ||
385 | STATIC void | |
8758280f | 386 | xfs_destroy_zones(void) |
1da177e4 | 387 | { |
0829c360 CH |
388 | mempool_destroy(xfs_ioend_pool); |
389 | kmem_zone_destroy(xfs_vnode_zone); | |
390 | kmem_zone_destroy(xfs_ioend_zone); | |
1da177e4 LT |
391 | } |
392 | ||
393 | /* | |
394 | * Attempt to flush the inode, this will actually fail | |
395 | * if the inode is pinned, but we dirty the inode again | |
396 | * at the point when it is unpinned after a log write, | |
8758280f | 397 | * since this is when the inode itself becomes flushable. |
1da177e4 LT |
398 | */ |
399 | STATIC int | |
a50cd269 | 400 | xfs_fs_write_inode( |
1da177e4 LT |
401 | struct inode *inode, |
402 | int sync) | |
403 | { | |
1da177e4 LT |
404 | int error = 0, flags = FLUSH_INODE; |
405 | ||
739bfb2a CH |
406 | vn_trace_entry(vn_from_inode(inode), __FUNCTION__, |
407 | (inst_t *)__return_address); | |
408 | if (sync) { | |
409 | filemap_fdatawait(inode->i_mapping); | |
410 | flags |= FLUSH_SYNC; | |
411 | } | |
412 | error = xfs_inode_flush(XFS_I(inode), flags); | |
413 | if (error == EAGAIN) { | |
414 | if (sync) | |
415 | error = xfs_inode_flush(XFS_I(inode), | |
416 | flags | FLUSH_LOG); | |
417 | else | |
418 | error = 0; | |
1da177e4 | 419 | } |
739bfb2a | 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 | */ | |
739bfb2a CH |
441 | if (XFS_I(inode)) |
442 | xfs_inactive(XFS_I(inode)); | |
1da177e4 | 443 | |
56d433e4 | 444 | |
b3aea4ed CH |
445 | if (XFS_I(inode)) { |
446 | xfs_iflags_clear(XFS_I(inode), XFS_IMODIFIED); | |
739bfb2a | 447 | if (xfs_reclaim(XFS_I(inode))) |
67fcaa73 | 448 | panic("%s: cannot reclaim 0x%p\n", __FUNCTION__, vp); |
b3aea4ed | 449 | } |
56d433e4 | 450 | |
739bfb2a | 451 | ASSERT(XFS_I(inode) == NULL); |
56d433e4 CH |
452 | |
453 | #ifdef XFS_VNODE_TRACE | |
454 | ktrace_free(vp->v_trace); | |
455 | #endif | |
456 | } | |
1da177e4 LT |
457 | |
458 | /* | |
459 | * Enqueue a work item to be picked up by the vfs xfssyncd thread. | |
460 | * Doing this has two advantages: | |
461 | * - It saves on stack space, which is tight in certain situations | |
462 | * - It can be used (with care) as a mechanism to avoid deadlocks. | |
463 | * Flushing while allocating in a full filesystem requires both. | |
464 | */ | |
465 | STATIC void | |
466 | xfs_syncd_queue_work( | |
b83bd138 | 467 | struct bhv_vfs *vfs, |
1da177e4 | 468 | void *data, |
b83bd138 | 469 | void (*syncer)(bhv_vfs_t *, void *)) |
1da177e4 | 470 | { |
b83bd138 | 471 | struct bhv_vfs_sync_work *work; |
1da177e4 | 472 | |
b83bd138 | 473 | work = kmem_alloc(sizeof(struct bhv_vfs_sync_work), KM_SLEEP); |
1da177e4 LT |
474 | INIT_LIST_HEAD(&work->w_list); |
475 | work->w_syncer = syncer; | |
476 | work->w_data = data; | |
477 | work->w_vfs = vfs; | |
478 | spin_lock(&vfs->vfs_sync_lock); | |
479 | list_add_tail(&work->w_list, &vfs->vfs_sync_list); | |
480 | spin_unlock(&vfs->vfs_sync_lock); | |
481 | wake_up_process(vfs->vfs_sync_task); | |
482 | } | |
483 | ||
484 | /* | |
485 | * Flush delayed allocate data, attempting to free up reserved space | |
486 | * from existing allocations. At this point a new allocation attempt | |
487 | * has failed with ENOSPC and we are in the process of scratching our | |
488 | * heads, looking about for more room... | |
489 | */ | |
490 | STATIC void | |
491 | xfs_flush_inode_work( | |
b83bd138 | 492 | bhv_vfs_t *vfs, |
1da177e4 LT |
493 | void *inode) |
494 | { | |
495 | filemap_flush(((struct inode *)inode)->i_mapping); | |
496 | iput((struct inode *)inode); | |
497 | } | |
498 | ||
499 | void | |
500 | xfs_flush_inode( | |
501 | xfs_inode_t *ip) | |
502 | { | |
ec86dc02 | 503 | struct inode *inode = vn_to_inode(XFS_ITOV(ip)); |
b83bd138 | 504 | struct bhv_vfs *vfs = XFS_MTOVFS(ip->i_mount); |
1da177e4 LT |
505 | |
506 | igrab(inode); | |
507 | xfs_syncd_queue_work(vfs, inode, xfs_flush_inode_work); | |
041e0e3b | 508 | delay(msecs_to_jiffies(500)); |
1da177e4 LT |
509 | } |
510 | ||
511 | /* | |
512 | * This is the "bigger hammer" version of xfs_flush_inode_work... | |
513 | * (IOW, "If at first you don't succeed, use a Bigger Hammer"). | |
514 | */ | |
515 | STATIC void | |
516 | xfs_flush_device_work( | |
b83bd138 | 517 | bhv_vfs_t *vfs, |
1da177e4 LT |
518 | void *inode) |
519 | { | |
520 | sync_blockdev(vfs->vfs_super->s_bdev); | |
521 | iput((struct inode *)inode); | |
522 | } | |
523 | ||
524 | void | |
525 | xfs_flush_device( | |
526 | xfs_inode_t *ip) | |
527 | { | |
ec86dc02 | 528 | struct inode *inode = vn_to_inode(XFS_ITOV(ip)); |
b83bd138 | 529 | struct bhv_vfs *vfs = XFS_MTOVFS(ip->i_mount); |
1da177e4 LT |
530 | |
531 | igrab(inode); | |
532 | xfs_syncd_queue_work(vfs, inode, xfs_flush_device_work); | |
041e0e3b | 533 | delay(msecs_to_jiffies(500)); |
1da177e4 LT |
534 | xfs_log_force(ip->i_mount, (xfs_lsn_t)0, XFS_LOG_FORCE|XFS_LOG_SYNC); |
535 | } | |
536 | ||
1da177e4 LT |
537 | STATIC void |
538 | vfs_sync_worker( | |
b83bd138 | 539 | bhv_vfs_t *vfsp, |
1da177e4 LT |
540 | void *unused) |
541 | { | |
542 | int error; | |
543 | ||
544 | if (!(vfsp->vfs_flag & VFS_RDONLY)) | |
b83bd138 | 545 | error = bhv_vfs_sync(vfsp, SYNC_FSDATA | SYNC_BDFLUSH | \ |
92821e2b DC |
546 | SYNC_ATTR | SYNC_REFCACHE | SYNC_SUPER, |
547 | NULL); | |
1da177e4 | 548 | vfsp->vfs_sync_seq++; |
1da177e4 LT |
549 | wake_up(&vfsp->vfs_wait_single_sync_task); |
550 | } | |
551 | ||
552 | STATIC int | |
553 | xfssyncd( | |
554 | void *arg) | |
555 | { | |
556 | long timeleft; | |
b83bd138 NS |
557 | bhv_vfs_t *vfsp = (bhv_vfs_t *) arg; |
558 | bhv_vfs_sync_work_t *work, *n; | |
4df08c52 | 559 | LIST_HEAD (tmp); |
1da177e4 | 560 | |
83144186 | 561 | set_freezable(); |
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 | |
2823945f DC |
655 | if (unlikely(sb->s_frozen == SB_FREEZE_WRITE)) { |
656 | /* | |
657 | * First stage of freeze - no more writers will make progress | |
658 | * now we are here, so we flush delwri and delalloc buffers | |
659 | * here, then wait for all I/O to complete. Data is frozen at | |
660 | * that point. Metadata is not frozen, transactions can still | |
661 | * occur here so don't bother flushing the buftarg (i.e | |
662 | * SYNC_QUIESCE) because it'll just get dirty again. | |
663 | */ | |
516b2e7c | 664 | flags = SYNC_DATA_QUIESCE; |
2823945f | 665 | } else |
f898d6c0 | 666 | flags = SYNC_FSDATA | (wait ? SYNC_WAIT : 0); |
1da177e4 | 667 | |
b83bd138 | 668 | error = bhv_vfs_sync(vfsp, flags, NULL); |
1da177e4 LT |
669 | sb->s_dirt = 0; |
670 | ||
671 | if (unlikely(laptop_mode)) { | |
672 | int prev_sync_seq = vfsp->vfs_sync_seq; | |
673 | ||
674 | /* | |
675 | * The disk must be active because we're syncing. | |
676 | * We schedule xfssyncd now (now that the disk is | |
677 | * active) instead of later (when it might not be). | |
678 | */ | |
679 | wake_up_process(vfsp->vfs_sync_task); | |
680 | /* | |
681 | * We have to wait for the sync iteration to complete. | |
682 | * If we don't, the disk activity caused by the sync | |
683 | * will come after the sync is completed, and that | |
684 | * triggers another sync from laptop mode. | |
685 | */ | |
686 | wait_event(vfsp->vfs_wait_single_sync_task, | |
687 | vfsp->vfs_sync_seq != prev_sync_seq); | |
688 | } | |
689 | ||
690 | return -error; | |
691 | } | |
692 | ||
693 | STATIC int | |
a50cd269 | 694 | xfs_fs_statfs( |
726c3342 | 695 | struct dentry *dentry, |
1da177e4 LT |
696 | struct kstatfs *statp) |
697 | { | |
d6938d1b DH |
698 | return -bhv_vfs_statvfs(vfs_from_sb(dentry->d_sb), statp, |
699 | vn_from_inode(dentry->d_inode)); | |
1da177e4 LT |
700 | } |
701 | ||
702 | STATIC int | |
a50cd269 | 703 | xfs_fs_remount( |
1da177e4 LT |
704 | struct super_block *sb, |
705 | int *flags, | |
706 | char *options) | |
707 | { | |
b83bd138 | 708 | bhv_vfs_t *vfsp = vfs_from_sb(sb); |
764d1f89 | 709 | struct xfs_mount_args *args = xfs_args_allocate(sb, 0); |
1da177e4 LT |
710 | int error; |
711 | ||
b83bd138 | 712 | error = bhv_vfs_parseargs(vfsp, options, args, 1); |
1da177e4 | 713 | if (!error) |
b83bd138 | 714 | error = bhv_vfs_mntupdate(vfsp, flags, args); |
1da177e4 LT |
715 | kmem_free(args, sizeof(*args)); |
716 | return -error; | |
717 | } | |
718 | ||
719 | STATIC void | |
a50cd269 | 720 | xfs_fs_lockfs( |
1da177e4 LT |
721 | struct super_block *sb) |
722 | { | |
b83bd138 | 723 | bhv_vfs_freeze(vfs_from_sb(sb)); |
1da177e4 LT |
724 | } |
725 | ||
726 | STATIC int | |
a50cd269 | 727 | xfs_fs_show_options( |
1da177e4 LT |
728 | struct seq_file *m, |
729 | struct vfsmount *mnt) | |
730 | { | |
b83bd138 | 731 | return -bhv_vfs_showargs(vfs_from_sb(mnt->mnt_sb), m); |
1da177e4 LT |
732 | } |
733 | ||
ee34807a | 734 | STATIC int |
a50cd269 | 735 | xfs_fs_quotasync( |
ee34807a NS |
736 | struct super_block *sb, |
737 | int type) | |
738 | { | |
b83bd138 | 739 | return -bhv_vfs_quotactl(vfs_from_sb(sb), Q_XQUOTASYNC, 0, NULL); |
ee34807a NS |
740 | } |
741 | ||
1da177e4 | 742 | STATIC int |
a50cd269 | 743 | xfs_fs_getxstate( |
1da177e4 LT |
744 | struct super_block *sb, |
745 | struct fs_quota_stat *fqs) | |
746 | { | |
b83bd138 | 747 | return -bhv_vfs_quotactl(vfs_from_sb(sb), Q_XGETQSTAT, 0, (caddr_t)fqs); |
1da177e4 LT |
748 | } |
749 | ||
750 | STATIC int | |
a50cd269 | 751 | xfs_fs_setxstate( |
1da177e4 LT |
752 | struct super_block *sb, |
753 | unsigned int flags, | |
754 | int op) | |
755 | { | |
b83bd138 | 756 | return -bhv_vfs_quotactl(vfs_from_sb(sb), op, 0, (caddr_t)&flags); |
1da177e4 LT |
757 | } |
758 | ||
759 | STATIC int | |
a50cd269 | 760 | xfs_fs_getxquota( |
1da177e4 LT |
761 | struct super_block *sb, |
762 | int type, | |
763 | qid_t id, | |
764 | struct fs_disk_quota *fdq) | |
765 | { | |
b83bd138 NS |
766 | return -bhv_vfs_quotactl(vfs_from_sb(sb), |
767 | (type == USRQUOTA) ? Q_XGETQUOTA : | |
768 | ((type == GRPQUOTA) ? Q_XGETGQUOTA : | |
769 | Q_XGETPQUOTA), id, (caddr_t)fdq); | |
1da177e4 LT |
770 | } |
771 | ||
772 | STATIC int | |
a50cd269 | 773 | xfs_fs_setxquota( |
1da177e4 LT |
774 | struct super_block *sb, |
775 | int type, | |
776 | qid_t id, | |
777 | struct fs_disk_quota *fdq) | |
778 | { | |
b83bd138 NS |
779 | return -bhv_vfs_quotactl(vfs_from_sb(sb), |
780 | (type == USRQUOTA) ? Q_XSETQLIM : | |
781 | ((type == GRPQUOTA) ? Q_XSETGQLIM : | |
782 | Q_XSETPQLIM), id, (caddr_t)fdq); | |
1da177e4 LT |
783 | } |
784 | ||
785 | STATIC int | |
a50cd269 | 786 | xfs_fs_fill_super( |
1da177e4 LT |
787 | struct super_block *sb, |
788 | void *data, | |
789 | int silent) | |
790 | { | |
67fcaa73 | 791 | struct bhv_vnode *rootvp; |
b83bd138 | 792 | struct bhv_vfs *vfsp = vfs_allocate(sb); |
764d1f89 | 793 | struct xfs_mount_args *args = xfs_args_allocate(sb, silent); |
1da177e4 | 794 | struct kstatfs statvfs; |
b83bd138 | 795 | int error; |
1da177e4 | 796 | |
1da177e4 LT |
797 | bhv_insert_all_vfsops(vfsp); |
798 | ||
b83bd138 | 799 | error = bhv_vfs_parseargs(vfsp, (char *)data, args, 0); |
1da177e4 LT |
800 | if (error) { |
801 | bhv_remove_all_vfsops(vfsp, 1); | |
802 | goto fail_vfsop; | |
803 | } | |
804 | ||
805 | sb_min_blocksize(sb, BBSIZE); | |
a50cd269 | 806 | sb->s_export_op = &xfs_export_operations; |
a50cd269 NS |
807 | sb->s_qcop = &xfs_quotactl_operations; |
808 | sb->s_op = &xfs_super_operations; | |
1da177e4 | 809 | |
b83bd138 | 810 | error = bhv_vfs_mount(vfsp, args, NULL); |
1da177e4 LT |
811 | if (error) { |
812 | bhv_remove_all_vfsops(vfsp, 1); | |
813 | goto fail_vfsop; | |
814 | } | |
815 | ||
b83bd138 | 816 | error = bhv_vfs_statvfs(vfsp, &statvfs, NULL); |
1da177e4 LT |
817 | if (error) |
818 | goto fail_unmount; | |
819 | ||
820 | sb->s_dirt = 1; | |
821 | sb->s_magic = statvfs.f_type; | |
822 | sb->s_blocksize = statvfs.f_bsize; | |
823 | sb->s_blocksize_bits = ffs(statvfs.f_bsize) - 1; | |
824 | sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits); | |
825 | sb->s_time_gran = 1; | |
826 | set_posix_acl_flag(sb); | |
827 | ||
b83bd138 | 828 | error = bhv_vfs_root(vfsp, &rootvp); |
1da177e4 LT |
829 | if (error) |
830 | goto fail_unmount; | |
831 | ||
ec86dc02 | 832 | sb->s_root = d_alloc_root(vn_to_inode(rootvp)); |
1da177e4 LT |
833 | if (!sb->s_root) { |
834 | error = ENOMEM; | |
835 | goto fail_vnrele; | |
836 | } | |
837 | if (is_bad_inode(sb->s_root->d_inode)) { | |
838 | error = EINVAL; | |
839 | goto fail_vnrele; | |
840 | } | |
a50cd269 | 841 | if ((error = xfs_fs_start_syncd(vfsp))) |
1da177e4 LT |
842 | goto fail_vnrele; |
843 | vn_trace_exit(rootvp, __FUNCTION__, (inst_t *)__return_address); | |
844 | ||
845 | kmem_free(args, sizeof(*args)); | |
846 | return 0; | |
847 | ||
848 | fail_vnrele: | |
849 | if (sb->s_root) { | |
850 | dput(sb->s_root); | |
851 | sb->s_root = NULL; | |
852 | } else { | |
853 | VN_RELE(rootvp); | |
854 | } | |
855 | ||
856 | fail_unmount: | |
b83bd138 | 857 | bhv_vfs_unmount(vfsp, 0, NULL); |
1da177e4 LT |
858 | |
859 | fail_vfsop: | |
860 | vfs_deallocate(vfsp); | |
861 | kmem_free(args, sizeof(*args)); | |
862 | return -error; | |
863 | } | |
864 | ||
454e2398 | 865 | STATIC int |
a50cd269 | 866 | xfs_fs_get_sb( |
1da177e4 LT |
867 | struct file_system_type *fs_type, |
868 | int flags, | |
869 | const char *dev_name, | |
454e2398 DH |
870 | void *data, |
871 | struct vfsmount *mnt) | |
1da177e4 | 872 | { |
454e2398 DH |
873 | return get_sb_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super, |
874 | mnt); | |
a50cd269 NS |
875 | } |
876 | ||
7989cb8e | 877 | static struct super_operations xfs_super_operations = { |
a50cd269 NS |
878 | .alloc_inode = xfs_fs_alloc_inode, |
879 | .destroy_inode = xfs_fs_destroy_inode, | |
880 | .write_inode = xfs_fs_write_inode, | |
881 | .clear_inode = xfs_fs_clear_inode, | |
882 | .put_super = xfs_fs_put_super, | |
883 | .write_super = xfs_fs_write_super, | |
884 | .sync_fs = xfs_fs_sync_super, | |
885 | .write_super_lockfs = xfs_fs_lockfs, | |
886 | .statfs = xfs_fs_statfs, | |
887 | .remount_fs = xfs_fs_remount, | |
888 | .show_options = xfs_fs_show_options, | |
1da177e4 LT |
889 | }; |
890 | ||
7989cb8e | 891 | static struct quotactl_ops xfs_quotactl_operations = { |
a50cd269 NS |
892 | .quota_sync = xfs_fs_quotasync, |
893 | .get_xstate = xfs_fs_getxstate, | |
894 | .set_xstate = xfs_fs_setxstate, | |
895 | .get_xquota = xfs_fs_getxquota, | |
896 | .set_xquota = xfs_fs_setxquota, | |
1da177e4 LT |
897 | }; |
898 | ||
5085b607 | 899 | static struct file_system_type xfs_fs_type = { |
1da177e4 LT |
900 | .owner = THIS_MODULE, |
901 | .name = "xfs", | |
a50cd269 | 902 | .get_sb = xfs_fs_get_sb, |
1da177e4 LT |
903 | .kill_sb = kill_block_super, |
904 | .fs_flags = FS_REQUIRES_DEV, | |
905 | }; | |
906 | ||
907 | ||
908 | STATIC int __init | |
909 | init_xfs_fs( void ) | |
910 | { | |
911 | int error; | |
1da177e4 LT |
912 | static char message[] __initdata = KERN_INFO \ |
913 | XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled\n"; | |
914 | ||
915 | printk(message); | |
916 | ||
1da177e4 LT |
917 | ktrace_init(64); |
918 | ||
8758280f | 919 | error = xfs_init_zones(); |
1da177e4 | 920 | if (error < 0) |
0829c360 | 921 | goto undo_zones; |
1da177e4 | 922 | |
ce8e922c | 923 | error = xfs_buf_init(); |
1da177e4 | 924 | if (error < 0) |
ce8e922c | 925 | goto undo_buffers; |
1da177e4 LT |
926 | |
927 | vn_init(); | |
928 | xfs_init(); | |
929 | uuid_init(); | |
930 | vfs_initquota(); | |
931 | ||
932 | error = register_filesystem(&xfs_fs_type); | |
933 | if (error) | |
934 | goto undo_register; | |
1da177e4 LT |
935 | return 0; |
936 | ||
937 | undo_register: | |
ce8e922c | 938 | xfs_buf_terminate(); |
1da177e4 | 939 | |
ce8e922c | 940 | undo_buffers: |
8758280f | 941 | xfs_destroy_zones(); |
1da177e4 | 942 | |
0829c360 | 943 | undo_zones: |
1da177e4 LT |
944 | return error; |
945 | } | |
946 | ||
947 | STATIC void __exit | |
948 | exit_xfs_fs( void ) | |
949 | { | |
950 | vfs_exitquota(); | |
1da177e4 LT |
951 | unregister_filesystem(&xfs_fs_type); |
952 | xfs_cleanup(); | |
ce8e922c | 953 | xfs_buf_terminate(); |
8758280f | 954 | xfs_destroy_zones(); |
1da177e4 LT |
955 | ktrace_uninit(); |
956 | } | |
957 | ||
958 | module_init(init_xfs_fs); | |
959 | module_exit(exit_xfs_fs); | |
960 | ||
961 | MODULE_AUTHOR("Silicon Graphics, Inc."); | |
962 | MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled"); | |
963 | MODULE_LICENSE("GPL"); |