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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" | |
49 | #include "xfs_version.h" | |
1da177e4 LT |
50 | |
51 | #include <linux/namei.h> | |
52 | #include <linux/init.h> | |
53 | #include <linux/mount.h> | |
0829c360 | 54 | #include <linux/mempool.h> |
1da177e4 | 55 | #include <linux/writeback.h> |
4df08c52 | 56 | #include <linux/kthread.h> |
7dfb7103 | 57 | #include <linux/freezer.h> |
1da177e4 | 58 | |
7989cb8e DC |
59 | static struct quotactl_ops xfs_quotactl_operations; |
60 | static struct super_operations xfs_super_operations; | |
61 | static kmem_zone_t *xfs_vnode_zone; | |
62 | static kmem_zone_t *xfs_ioend_zone; | |
0829c360 | 63 | mempool_t *xfs_ioend_pool; |
1da177e4 LT |
64 | |
65 | STATIC struct xfs_mount_args * | |
66 | xfs_args_allocate( | |
764d1f89 NS |
67 | struct super_block *sb, |
68 | int silent) | |
1da177e4 LT |
69 | { |
70 | struct xfs_mount_args *args; | |
71 | ||
72 | args = kmem_zalloc(sizeof(struct xfs_mount_args), KM_SLEEP); | |
73 | args->logbufs = args->logbufsize = -1; | |
74 | strncpy(args->fsname, sb->s_id, MAXNAMELEN); | |
75 | ||
76 | /* Copy the already-parsed mount(2) flags we're interested in */ | |
1da177e4 LT |
77 | if (sb->s_flags & MS_DIRSYNC) |
78 | args->flags |= XFSMNT_DIRSYNC; | |
79 | if (sb->s_flags & MS_SYNCHRONOUS) | |
80 | args->flags |= XFSMNT_WSYNC; | |
764d1f89 NS |
81 | if (silent) |
82 | args->flags |= XFSMNT_QUIET; | |
1da177e4 LT |
83 | args->flags |= XFSMNT_32BITINODES; |
84 | ||
85 | return args; | |
86 | } | |
87 | ||
88 | __uint64_t | |
89 | xfs_max_file_offset( | |
90 | unsigned int blockshift) | |
91 | { | |
92 | unsigned int pagefactor = 1; | |
93 | unsigned int bitshift = BITS_PER_LONG - 1; | |
94 | ||
95 | /* Figure out maximum filesize, on Linux this can depend on | |
96 | * the filesystem blocksize (on 32 bit platforms). | |
97 | * __block_prepare_write does this in an [unsigned] long... | |
98 | * page->index << (PAGE_CACHE_SHIFT - bbits) | |
99 | * So, for page sized blocks (4K on 32 bit platforms), | |
100 | * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is | |
101 | * (((u64)PAGE_CACHE_SIZE << (BITS_PER_LONG-1))-1) | |
102 | * but for smaller blocksizes it is less (bbits = log2 bsize). | |
103 | * Note1: get_block_t takes a long (implicit cast from above) | |
104 | * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch | |
105 | * can optionally convert the [unsigned] long from above into | |
106 | * an [unsigned] long long. | |
107 | */ | |
108 | ||
109 | #if BITS_PER_LONG == 32 | |
110 | # if defined(CONFIG_LBD) | |
111 | ASSERT(sizeof(sector_t) == 8); | |
112 | pagefactor = PAGE_CACHE_SIZE; | |
113 | bitshift = BITS_PER_LONG; | |
114 | # else | |
115 | pagefactor = PAGE_CACHE_SIZE >> (PAGE_CACHE_SHIFT - blockshift); | |
116 | # endif | |
117 | #endif | |
118 | ||
119 | return (((__uint64_t)pagefactor) << bitshift) - 1; | |
120 | } | |
121 | ||
7989cb8e | 122 | STATIC_INLINE void |
1da177e4 LT |
123 | xfs_set_inodeops( |
124 | struct inode *inode) | |
125 | { | |
0432dab2 CH |
126 | switch (inode->i_mode & S_IFMT) { |
127 | case S_IFREG: | |
416c6d5b | 128 | inode->i_op = &xfs_inode_operations; |
3562fd45 | 129 | inode->i_fop = &xfs_file_operations; |
e4c573bb | 130 | inode->i_mapping->a_ops = &xfs_address_space_operations; |
0432dab2 CH |
131 | break; |
132 | case S_IFDIR: | |
416c6d5b | 133 | inode->i_op = &xfs_dir_inode_operations; |
3562fd45 | 134 | inode->i_fop = &xfs_dir_file_operations; |
0432dab2 CH |
135 | break; |
136 | case S_IFLNK: | |
416c6d5b | 137 | inode->i_op = &xfs_symlink_inode_operations; |
1da177e4 | 138 | if (inode->i_blocks) |
e4c573bb | 139 | inode->i_mapping->a_ops = &xfs_address_space_operations; |
0432dab2 CH |
140 | break; |
141 | default: | |
416c6d5b | 142 | inode->i_op = &xfs_inode_operations; |
1da177e4 | 143 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
0432dab2 | 144 | break; |
1da177e4 LT |
145 | } |
146 | } | |
147 | ||
7989cb8e | 148 | STATIC_INLINE void |
1da177e4 LT |
149 | xfs_revalidate_inode( |
150 | xfs_mount_t *mp, | |
67fcaa73 | 151 | bhv_vnode_t *vp, |
1da177e4 LT |
152 | xfs_inode_t *ip) |
153 | { | |
ec86dc02 | 154 | struct inode *inode = vn_to_inode(vp); |
1da177e4 | 155 | |
0432dab2 | 156 | inode->i_mode = ip->i_d.di_mode; |
1da177e4 LT |
157 | inode->i_nlink = ip->i_d.di_nlink; |
158 | inode->i_uid = ip->i_d.di_uid; | |
159 | inode->i_gid = ip->i_d.di_gid; | |
0432dab2 CH |
160 | |
161 | switch (inode->i_mode & S_IFMT) { | |
162 | case S_IFBLK: | |
163 | case S_IFCHR: | |
164 | inode->i_rdev = | |
165 | MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff, | |
166 | sysv_minor(ip->i_df.if_u2.if_rdev)); | |
167 | break; | |
168 | default: | |
1da177e4 | 169 | inode->i_rdev = 0; |
0432dab2 | 170 | break; |
1da177e4 | 171 | } |
0432dab2 | 172 | |
1da177e4 LT |
173 | inode->i_generation = ip->i_d.di_gen; |
174 | i_size_write(inode, ip->i_d.di_size); | |
175 | inode->i_blocks = | |
176 | XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks); | |
177 | inode->i_atime.tv_sec = ip->i_d.di_atime.t_sec; | |
178 | inode->i_atime.tv_nsec = ip->i_d.di_atime.t_nsec; | |
179 | inode->i_mtime.tv_sec = ip->i_d.di_mtime.t_sec; | |
180 | inode->i_mtime.tv_nsec = ip->i_d.di_mtime.t_nsec; | |
181 | inode->i_ctime.tv_sec = ip->i_d.di_ctime.t_sec; | |
182 | inode->i_ctime.tv_nsec = ip->i_d.di_ctime.t_nsec; | |
183 | if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE) | |
184 | inode->i_flags |= S_IMMUTABLE; | |
185 | else | |
186 | inode->i_flags &= ~S_IMMUTABLE; | |
187 | if (ip->i_d.di_flags & XFS_DIFLAG_APPEND) | |
188 | inode->i_flags |= S_APPEND; | |
189 | else | |
190 | inode->i_flags &= ~S_APPEND; | |
191 | if (ip->i_d.di_flags & XFS_DIFLAG_SYNC) | |
192 | inode->i_flags |= S_SYNC; | |
193 | else | |
194 | inode->i_flags &= ~S_SYNC; | |
195 | if (ip->i_d.di_flags & XFS_DIFLAG_NOATIME) | |
196 | inode->i_flags |= S_NOATIME; | |
197 | else | |
198 | inode->i_flags &= ~S_NOATIME; | |
199 | vp->v_flag &= ~VMODIFIED; | |
200 | } | |
201 | ||
202 | void | |
203 | xfs_initialize_vnode( | |
204 | bhv_desc_t *bdp, | |
67fcaa73 | 205 | bhv_vnode_t *vp, |
1da177e4 LT |
206 | bhv_desc_t *inode_bhv, |
207 | int unlock) | |
208 | { | |
209 | xfs_inode_t *ip = XFS_BHVTOI(inode_bhv); | |
ec86dc02 | 210 | struct inode *inode = vn_to_inode(vp); |
1da177e4 LT |
211 | |
212 | if (!inode_bhv->bd_vobj) { | |
213 | vp->v_vfsp = bhvtovfs(bdp); | |
214 | bhv_desc_init(inode_bhv, ip, vp, &xfs_vnodeops); | |
215 | bhv_insert(VN_BHV_HEAD(vp), inode_bhv); | |
216 | } | |
217 | ||
218 | /* | |
219 | * We need to set the ops vectors, and unlock the inode, but if | |
220 | * we have been called during the new inode create process, it is | |
221 | * too early to fill in the Linux inode. We will get called a | |
222 | * second time once the inode is properly set up, and then we can | |
223 | * finish our work. | |
224 | */ | |
225 | if (ip->i_d.di_mode != 0 && unlock && (inode->i_state & I_NEW)) { | |
1da177e4 LT |
226 | xfs_revalidate_inode(XFS_BHVTOM(bdp), vp, ip); |
227 | xfs_set_inodeops(inode); | |
ec86dc02 | 228 | |
7a18c386 | 229 | xfs_iflags_clear(ip, XFS_INEW); |
1da177e4 LT |
230 | barrier(); |
231 | ||
232 | unlock_new_inode(inode); | |
233 | } | |
234 | } | |
235 | ||
236 | int | |
237 | xfs_blkdev_get( | |
238 | xfs_mount_t *mp, | |
239 | const char *name, | |
240 | struct block_device **bdevp) | |
241 | { | |
242 | int error = 0; | |
243 | ||
244 | *bdevp = open_bdev_excl(name, 0, mp); | |
245 | if (IS_ERR(*bdevp)) { | |
246 | error = PTR_ERR(*bdevp); | |
247 | printk("XFS: Invalid device [%s], error=%d\n", name, error); | |
248 | } | |
249 | ||
250 | return -error; | |
251 | } | |
252 | ||
253 | void | |
254 | xfs_blkdev_put( | |
255 | struct block_device *bdev) | |
256 | { | |
257 | if (bdev) | |
258 | close_bdev_excl(bdev); | |
259 | } | |
260 | ||
f538d4da CH |
261 | /* |
262 | * Try to write out the superblock using barriers. | |
263 | */ | |
264 | STATIC int | |
265 | xfs_barrier_test( | |
266 | xfs_mount_t *mp) | |
267 | { | |
268 | xfs_buf_t *sbp = xfs_getsb(mp, 0); | |
269 | int error; | |
270 | ||
271 | XFS_BUF_UNDONE(sbp); | |
272 | XFS_BUF_UNREAD(sbp); | |
273 | XFS_BUF_UNDELAYWRITE(sbp); | |
274 | XFS_BUF_WRITE(sbp); | |
275 | XFS_BUF_UNASYNC(sbp); | |
276 | XFS_BUF_ORDERED(sbp); | |
277 | ||
278 | xfsbdstrat(mp, sbp); | |
279 | error = xfs_iowait(sbp); | |
280 | ||
281 | /* | |
282 | * Clear all the flags we set and possible error state in the | |
283 | * buffer. We only did the write to try out whether barriers | |
284 | * worked and shouldn't leave any traces in the superblock | |
285 | * buffer. | |
286 | */ | |
287 | XFS_BUF_DONE(sbp); | |
288 | XFS_BUF_ERROR(sbp, 0); | |
289 | XFS_BUF_UNORDERED(sbp); | |
290 | ||
291 | xfs_buf_relse(sbp); | |
292 | return error; | |
293 | } | |
294 | ||
295 | void | |
296 | xfs_mountfs_check_barriers(xfs_mount_t *mp) | |
297 | { | |
298 | int error; | |
299 | ||
300 | if (mp->m_logdev_targp != mp->m_ddev_targp) { | |
301 | xfs_fs_cmn_err(CE_NOTE, mp, | |
302 | "Disabling barriers, not supported with external log device"); | |
303 | mp->m_flags &= ~XFS_MOUNT_BARRIER; | |
4ef19ddd | 304 | return; |
f538d4da CH |
305 | } |
306 | ||
ce8e922c | 307 | if (mp->m_ddev_targp->bt_bdev->bd_disk->queue->ordered == |
f538d4da CH |
308 | QUEUE_ORDERED_NONE) { |
309 | xfs_fs_cmn_err(CE_NOTE, mp, | |
310 | "Disabling barriers, not supported by the underlying device"); | |
311 | mp->m_flags &= ~XFS_MOUNT_BARRIER; | |
4ef19ddd | 312 | return; |
f538d4da CH |
313 | } |
314 | ||
b2ea401b NS |
315 | if (xfs_readonly_buftarg(mp->m_ddev_targp)) { |
316 | xfs_fs_cmn_err(CE_NOTE, mp, | |
317 | "Disabling barriers, underlying device is readonly"); | |
318 | mp->m_flags &= ~XFS_MOUNT_BARRIER; | |
319 | return; | |
320 | } | |
321 | ||
f538d4da CH |
322 | error = xfs_barrier_test(mp); |
323 | if (error) { | |
324 | xfs_fs_cmn_err(CE_NOTE, mp, | |
325 | "Disabling barriers, trial barrier write failed"); | |
326 | mp->m_flags &= ~XFS_MOUNT_BARRIER; | |
4ef19ddd | 327 | return; |
f538d4da CH |
328 | } |
329 | } | |
330 | ||
331 | void | |
332 | xfs_blkdev_issue_flush( | |
333 | xfs_buftarg_t *buftarg) | |
334 | { | |
ce8e922c | 335 | blkdev_issue_flush(buftarg->bt_bdev, NULL); |
f538d4da | 336 | } |
1da177e4 LT |
337 | |
338 | STATIC struct inode * | |
a50cd269 | 339 | xfs_fs_alloc_inode( |
1da177e4 LT |
340 | struct super_block *sb) |
341 | { | |
67fcaa73 | 342 | bhv_vnode_t *vp; |
1da177e4 | 343 | |
8758280f NS |
344 | vp = kmem_zone_alloc(xfs_vnode_zone, KM_SLEEP); |
345 | if (unlikely(!vp)) | |
1da177e4 | 346 | return NULL; |
ec86dc02 | 347 | return vn_to_inode(vp); |
1da177e4 LT |
348 | } |
349 | ||
350 | STATIC void | |
a50cd269 | 351 | xfs_fs_destroy_inode( |
1da177e4 LT |
352 | struct inode *inode) |
353 | { | |
ec86dc02 | 354 | kmem_zone_free(xfs_vnode_zone, vn_from_inode(inode)); |
1da177e4 LT |
355 | } |
356 | ||
357 | STATIC void | |
a50cd269 | 358 | xfs_fs_inode_init_once( |
8758280f NS |
359 | void *vnode, |
360 | kmem_zone_t *zonep, | |
1da177e4 LT |
361 | unsigned long flags) |
362 | { | |
a35afb83 | 363 | inode_init_once(vn_to_inode((bhv_vnode_t *)vnode)); |
1da177e4 LT |
364 | } |
365 | ||
366 | STATIC int | |
8758280f | 367 | xfs_init_zones(void) |
1da177e4 | 368 | { |
67fcaa73 | 369 | xfs_vnode_zone = kmem_zone_init_flags(sizeof(bhv_vnode_t), "xfs_vnode", |
e0cc2325 NS |
370 | KM_ZONE_HWALIGN | KM_ZONE_RECLAIM | |
371 | KM_ZONE_SPREAD, | |
a50cd269 | 372 | xfs_fs_inode_init_once); |
0829c360 CH |
373 | if (!xfs_vnode_zone) |
374 | goto out; | |
375 | ||
376 | xfs_ioend_zone = kmem_zone_init(sizeof(xfs_ioend_t), "xfs_ioend"); | |
377 | if (!xfs_ioend_zone) | |
378 | goto out_destroy_vnode_zone; | |
379 | ||
93d2341c MD |
380 | xfs_ioend_pool = mempool_create_slab_pool(4 * MAX_BUF_PER_PAGE, |
381 | xfs_ioend_zone); | |
0829c360 CH |
382 | if (!xfs_ioend_pool) |
383 | goto out_free_ioend_zone; | |
1da177e4 | 384 | return 0; |
0829c360 | 385 | |
0829c360 CH |
386 | out_free_ioend_zone: |
387 | kmem_zone_destroy(xfs_ioend_zone); | |
388 | out_destroy_vnode_zone: | |
389 | kmem_zone_destroy(xfs_vnode_zone); | |
390 | out: | |
391 | return -ENOMEM; | |
1da177e4 LT |
392 | } |
393 | ||
394 | STATIC void | |
8758280f | 395 | xfs_destroy_zones(void) |
1da177e4 | 396 | { |
0829c360 CH |
397 | mempool_destroy(xfs_ioend_pool); |
398 | kmem_zone_destroy(xfs_vnode_zone); | |
399 | kmem_zone_destroy(xfs_ioend_zone); | |
1da177e4 LT |
400 | } |
401 | ||
402 | /* | |
403 | * Attempt to flush the inode, this will actually fail | |
404 | * if the inode is pinned, but we dirty the inode again | |
405 | * at the point when it is unpinned after a log write, | |
8758280f | 406 | * since this is when the inode itself becomes flushable. |
1da177e4 LT |
407 | */ |
408 | STATIC int | |
a50cd269 | 409 | xfs_fs_write_inode( |
1da177e4 LT |
410 | struct inode *inode, |
411 | int sync) | |
412 | { | |
67fcaa73 | 413 | bhv_vnode_t *vp = vn_from_inode(inode); |
1da177e4 LT |
414 | int error = 0, flags = FLUSH_INODE; |
415 | ||
416 | if (vp) { | |
417 | vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address); | |
418 | if (sync) | |
419 | flags |= FLUSH_SYNC; | |
67fcaa73 NS |
420 | error = bhv_vop_iflush(vp, flags); |
421 | if (error == EAGAIN) | |
422 | error = sync? bhv_vop_iflush(vp, flags | FLUSH_LOG) : 0; | |
1da177e4 | 423 | } |
1da177e4 LT |
424 | return -error; |
425 | } | |
426 | ||
427 | STATIC void | |
a50cd269 | 428 | xfs_fs_clear_inode( |
1da177e4 LT |
429 | struct inode *inode) |
430 | { | |
67fcaa73 | 431 | bhv_vnode_t *vp = vn_from_inode(inode); |
1da177e4 | 432 | |
a50cd269 | 433 | vn_trace_entry(vp, __FUNCTION__, (inst_t *)__return_address); |
56d433e4 | 434 | |
56d433e4 CH |
435 | XFS_STATS_INC(vn_rele); |
436 | XFS_STATS_INC(vn_remove); | |
437 | XFS_STATS_INC(vn_reclaim); | |
438 | XFS_STATS_DEC(vn_active); | |
439 | ||
02ba71de CH |
440 | /* |
441 | * This can happen because xfs_iget_core calls xfs_idestroy if we | |
442 | * find an inode with di_mode == 0 but without IGET_CREATE set. | |
443 | */ | |
67fcaa73 NS |
444 | if (VNHEAD(vp)) |
445 | bhv_vop_inactive(vp, NULL); | |
1da177e4 | 446 | |
56d433e4 CH |
447 | VN_LOCK(vp); |
448 | vp->v_flag &= ~VMODIFIED; | |
449 | VN_UNLOCK(vp, 0); | |
450 | ||
67fcaa73 NS |
451 | if (VNHEAD(vp)) |
452 | if (bhv_vop_reclaim(vp)) | |
453 | panic("%s: cannot reclaim 0x%p\n", __FUNCTION__, vp); | |
56d433e4 | 454 | |
67fcaa73 | 455 | ASSERT(VNHEAD(vp) == NULL); |
56d433e4 CH |
456 | |
457 | #ifdef XFS_VNODE_TRACE | |
458 | ktrace_free(vp->v_trace); | |
459 | #endif | |
460 | } | |
1da177e4 LT |
461 | |
462 | /* | |
463 | * Enqueue a work item to be picked up by the vfs xfssyncd thread. | |
464 | * Doing this has two advantages: | |
465 | * - It saves on stack space, which is tight in certain situations | |
466 | * - It can be used (with care) as a mechanism to avoid deadlocks. | |
467 | * Flushing while allocating in a full filesystem requires both. | |
468 | */ | |
469 | STATIC void | |
470 | xfs_syncd_queue_work( | |
b83bd138 | 471 | struct bhv_vfs *vfs, |
1da177e4 | 472 | void *data, |
b83bd138 | 473 | void (*syncer)(bhv_vfs_t *, void *)) |
1da177e4 | 474 | { |
b83bd138 | 475 | struct bhv_vfs_sync_work *work; |
1da177e4 | 476 | |
b83bd138 | 477 | work = kmem_alloc(sizeof(struct bhv_vfs_sync_work), KM_SLEEP); |
1da177e4 LT |
478 | INIT_LIST_HEAD(&work->w_list); |
479 | work->w_syncer = syncer; | |
480 | work->w_data = data; | |
481 | work->w_vfs = vfs; | |
482 | spin_lock(&vfs->vfs_sync_lock); | |
483 | list_add_tail(&work->w_list, &vfs->vfs_sync_list); | |
484 | spin_unlock(&vfs->vfs_sync_lock); | |
485 | wake_up_process(vfs->vfs_sync_task); | |
486 | } | |
487 | ||
488 | /* | |
489 | * Flush delayed allocate data, attempting to free up reserved space | |
490 | * from existing allocations. At this point a new allocation attempt | |
491 | * has failed with ENOSPC and we are in the process of scratching our | |
492 | * heads, looking about for more room... | |
493 | */ | |
494 | STATIC void | |
495 | xfs_flush_inode_work( | |
b83bd138 | 496 | bhv_vfs_t *vfs, |
1da177e4 LT |
497 | void *inode) |
498 | { | |
499 | filemap_flush(((struct inode *)inode)->i_mapping); | |
500 | iput((struct inode *)inode); | |
501 | } | |
502 | ||
503 | void | |
504 | xfs_flush_inode( | |
505 | xfs_inode_t *ip) | |
506 | { | |
ec86dc02 | 507 | struct inode *inode = vn_to_inode(XFS_ITOV(ip)); |
b83bd138 | 508 | struct bhv_vfs *vfs = XFS_MTOVFS(ip->i_mount); |
1da177e4 LT |
509 | |
510 | igrab(inode); | |
511 | xfs_syncd_queue_work(vfs, inode, xfs_flush_inode_work); | |
041e0e3b | 512 | delay(msecs_to_jiffies(500)); |
1da177e4 LT |
513 | } |
514 | ||
515 | /* | |
516 | * This is the "bigger hammer" version of xfs_flush_inode_work... | |
517 | * (IOW, "If at first you don't succeed, use a Bigger Hammer"). | |
518 | */ | |
519 | STATIC void | |
520 | xfs_flush_device_work( | |
b83bd138 | 521 | bhv_vfs_t *vfs, |
1da177e4 LT |
522 | void *inode) |
523 | { | |
524 | sync_blockdev(vfs->vfs_super->s_bdev); | |
525 | iput((struct inode *)inode); | |
526 | } | |
527 | ||
528 | void | |
529 | xfs_flush_device( | |
530 | xfs_inode_t *ip) | |
531 | { | |
ec86dc02 | 532 | struct inode *inode = vn_to_inode(XFS_ITOV(ip)); |
b83bd138 | 533 | struct bhv_vfs *vfs = XFS_MTOVFS(ip->i_mount); |
1da177e4 LT |
534 | |
535 | igrab(inode); | |
536 | xfs_syncd_queue_work(vfs, inode, xfs_flush_device_work); | |
041e0e3b | 537 | delay(msecs_to_jiffies(500)); |
1da177e4 LT |
538 | xfs_log_force(ip->i_mount, (xfs_lsn_t)0, XFS_LOG_FORCE|XFS_LOG_SYNC); |
539 | } | |
540 | ||
1da177e4 LT |
541 | STATIC void |
542 | vfs_sync_worker( | |
b83bd138 | 543 | bhv_vfs_t *vfsp, |
1da177e4 LT |
544 | void *unused) |
545 | { | |
546 | int error; | |
547 | ||
548 | if (!(vfsp->vfs_flag & VFS_RDONLY)) | |
b83bd138 NS |
549 | error = bhv_vfs_sync(vfsp, SYNC_FSDATA | SYNC_BDFLUSH | \ |
550 | SYNC_ATTR | SYNC_REFCACHE, NULL); | |
1da177e4 | 551 | vfsp->vfs_sync_seq++; |
1da177e4 LT |
552 | wake_up(&vfsp->vfs_wait_single_sync_task); |
553 | } | |
554 | ||
555 | STATIC int | |
556 | xfssyncd( | |
557 | void *arg) | |
558 | { | |
559 | long timeleft; | |
b83bd138 NS |
560 | bhv_vfs_t *vfsp = (bhv_vfs_t *) arg; |
561 | bhv_vfs_sync_work_t *work, *n; | |
4df08c52 | 562 | LIST_HEAD (tmp); |
1da177e4 | 563 | |
041e0e3b | 564 | timeleft = xfs_syncd_centisecs * msecs_to_jiffies(10); |
1da177e4 | 565 | for (;;) { |
041e0e3b | 566 | timeleft = schedule_timeout_interruptible(timeleft); |
1da177e4 | 567 | /* swsusp */ |
3e1d1d28 | 568 | try_to_freeze(); |
71df099d | 569 | if (kthread_should_stop() && list_empty(&vfsp->vfs_sync_list)) |
1da177e4 LT |
570 | break; |
571 | ||
572 | spin_lock(&vfsp->vfs_sync_lock); | |
573 | /* | |
574 | * We can get woken by laptop mode, to do a sync - | |
575 | * that's the (only!) case where the list would be | |
576 | * empty with time remaining. | |
577 | */ | |
578 | if (!timeleft || list_empty(&vfsp->vfs_sync_list)) { | |
579 | if (!timeleft) | |
041e0e3b NA |
580 | timeleft = xfs_syncd_centisecs * |
581 | msecs_to_jiffies(10); | |
1da177e4 LT |
582 | INIT_LIST_HEAD(&vfsp->vfs_sync_work.w_list); |
583 | list_add_tail(&vfsp->vfs_sync_work.w_list, | |
584 | &vfsp->vfs_sync_list); | |
585 | } | |
586 | list_for_each_entry_safe(work, n, &vfsp->vfs_sync_list, w_list) | |
587 | list_move(&work->w_list, &tmp); | |
588 | spin_unlock(&vfsp->vfs_sync_lock); | |
589 | ||
590 | list_for_each_entry_safe(work, n, &tmp, w_list) { | |
591 | (*work->w_syncer)(vfsp, work->w_data); | |
592 | list_del(&work->w_list); | |
593 | if (work == &vfsp->vfs_sync_work) | |
594 | continue; | |
b83bd138 | 595 | kmem_free(work, sizeof(struct bhv_vfs_sync_work)); |
1da177e4 LT |
596 | } |
597 | } | |
598 | ||
1da177e4 LT |
599 | return 0; |
600 | } | |
601 | ||
602 | STATIC int | |
a50cd269 | 603 | xfs_fs_start_syncd( |
b83bd138 | 604 | bhv_vfs_t *vfsp) |
1da177e4 | 605 | { |
4df08c52 CH |
606 | vfsp->vfs_sync_work.w_syncer = vfs_sync_worker; |
607 | vfsp->vfs_sync_work.w_vfs = vfsp; | |
608 | vfsp->vfs_sync_task = kthread_run(xfssyncd, vfsp, "xfssyncd"); | |
609 | if (IS_ERR(vfsp->vfs_sync_task)) | |
610 | return -PTR_ERR(vfsp->vfs_sync_task); | |
1da177e4 LT |
611 | return 0; |
612 | } | |
613 | ||
614 | STATIC void | |
a50cd269 | 615 | xfs_fs_stop_syncd( |
b83bd138 | 616 | bhv_vfs_t *vfsp) |
1da177e4 | 617 | { |
4df08c52 | 618 | kthread_stop(vfsp->vfs_sync_task); |
1da177e4 LT |
619 | } |
620 | ||
621 | STATIC void | |
a50cd269 | 622 | xfs_fs_put_super( |
1da177e4 LT |
623 | struct super_block *sb) |
624 | { | |
b83bd138 | 625 | bhv_vfs_t *vfsp = vfs_from_sb(sb); |
1da177e4 LT |
626 | int error; |
627 | ||
a50cd269 | 628 | xfs_fs_stop_syncd(vfsp); |
b83bd138 NS |
629 | bhv_vfs_sync(vfsp, SYNC_ATTR | SYNC_DELWRI, NULL); |
630 | error = bhv_vfs_unmount(vfsp, 0, NULL); | |
1da177e4 | 631 | if (error) { |
b83bd138 NS |
632 | printk("XFS: unmount got error=%d\n", error); |
633 | printk("%s: vfs=0x%p left dangling!\n", __FUNCTION__, vfsp); | |
634 | } else { | |
635 | vfs_deallocate(vfsp); | |
1da177e4 | 636 | } |
1da177e4 LT |
637 | } |
638 | ||
639 | STATIC void | |
a50cd269 | 640 | xfs_fs_write_super( |
1da177e4 LT |
641 | struct super_block *sb) |
642 | { | |
b83bd138 NS |
643 | if (!(sb->s_flags & MS_RDONLY)) |
644 | bhv_vfs_sync(vfs_from_sb(sb), SYNC_FSDATA, NULL); | |
1da177e4 LT |
645 | sb->s_dirt = 0; |
646 | } | |
647 | ||
648 | STATIC int | |
a50cd269 | 649 | xfs_fs_sync_super( |
1da177e4 LT |
650 | struct super_block *sb, |
651 | int wait) | |
652 | { | |
b83bd138 NS |
653 | bhv_vfs_t *vfsp = vfs_from_sb(sb); |
654 | int error; | |
655 | int flags; | |
1da177e4 | 656 | |
2823945f DC |
657 | if (unlikely(sb->s_frozen == SB_FREEZE_WRITE)) { |
658 | /* | |
659 | * First stage of freeze - no more writers will make progress | |
660 | * now we are here, so we flush delwri and delalloc buffers | |
661 | * here, then wait for all I/O to complete. Data is frozen at | |
662 | * that point. Metadata is not frozen, transactions can still | |
663 | * occur here so don't bother flushing the buftarg (i.e | |
664 | * SYNC_QUIESCE) because it'll just get dirty again. | |
665 | */ | |
3c0dc77b | 666 | flags = SYNC_FSDATA | SYNC_DELWRI | SYNC_WAIT | SYNC_IOWAIT; |
2823945f | 667 | } else |
f898d6c0 | 668 | flags = SYNC_FSDATA | (wait ? SYNC_WAIT : 0); |
1da177e4 | 669 | |
b83bd138 | 670 | error = bhv_vfs_sync(vfsp, flags, NULL); |
1da177e4 LT |
671 | sb->s_dirt = 0; |
672 | ||
673 | if (unlikely(laptop_mode)) { | |
674 | int prev_sync_seq = vfsp->vfs_sync_seq; | |
675 | ||
676 | /* | |
677 | * The disk must be active because we're syncing. | |
678 | * We schedule xfssyncd now (now that the disk is | |
679 | * active) instead of later (when it might not be). | |
680 | */ | |
681 | wake_up_process(vfsp->vfs_sync_task); | |
682 | /* | |
683 | * We have to wait for the sync iteration to complete. | |
684 | * If we don't, the disk activity caused by the sync | |
685 | * will come after the sync is completed, and that | |
686 | * triggers another sync from laptop mode. | |
687 | */ | |
688 | wait_event(vfsp->vfs_wait_single_sync_task, | |
689 | vfsp->vfs_sync_seq != prev_sync_seq); | |
690 | } | |
691 | ||
692 | return -error; | |
693 | } | |
694 | ||
695 | STATIC int | |
a50cd269 | 696 | xfs_fs_statfs( |
726c3342 | 697 | struct dentry *dentry, |
1da177e4 LT |
698 | struct kstatfs *statp) |
699 | { | |
d6938d1b DH |
700 | return -bhv_vfs_statvfs(vfs_from_sb(dentry->d_sb), statp, |
701 | vn_from_inode(dentry->d_inode)); | |
1da177e4 LT |
702 | } |
703 | ||
704 | STATIC int | |
a50cd269 | 705 | xfs_fs_remount( |
1da177e4 LT |
706 | struct super_block *sb, |
707 | int *flags, | |
708 | char *options) | |
709 | { | |
b83bd138 | 710 | bhv_vfs_t *vfsp = vfs_from_sb(sb); |
764d1f89 | 711 | struct xfs_mount_args *args = xfs_args_allocate(sb, 0); |
1da177e4 LT |
712 | int error; |
713 | ||
b83bd138 | 714 | error = bhv_vfs_parseargs(vfsp, options, args, 1); |
1da177e4 | 715 | if (!error) |
b83bd138 | 716 | error = bhv_vfs_mntupdate(vfsp, flags, args); |
1da177e4 LT |
717 | kmem_free(args, sizeof(*args)); |
718 | return -error; | |
719 | } | |
720 | ||
721 | STATIC void | |
a50cd269 | 722 | xfs_fs_lockfs( |
1da177e4 LT |
723 | struct super_block *sb) |
724 | { | |
b83bd138 | 725 | bhv_vfs_freeze(vfs_from_sb(sb)); |
1da177e4 LT |
726 | } |
727 | ||
728 | STATIC int | |
a50cd269 | 729 | xfs_fs_show_options( |
1da177e4 LT |
730 | struct seq_file *m, |
731 | struct vfsmount *mnt) | |
732 | { | |
b83bd138 | 733 | return -bhv_vfs_showargs(vfs_from_sb(mnt->mnt_sb), m); |
1da177e4 LT |
734 | } |
735 | ||
ee34807a | 736 | STATIC int |
a50cd269 | 737 | xfs_fs_quotasync( |
ee34807a NS |
738 | struct super_block *sb, |
739 | int type) | |
740 | { | |
b83bd138 | 741 | return -bhv_vfs_quotactl(vfs_from_sb(sb), Q_XQUOTASYNC, 0, NULL); |
ee34807a NS |
742 | } |
743 | ||
1da177e4 | 744 | STATIC int |
a50cd269 | 745 | xfs_fs_getxstate( |
1da177e4 LT |
746 | struct super_block *sb, |
747 | struct fs_quota_stat *fqs) | |
748 | { | |
b83bd138 | 749 | return -bhv_vfs_quotactl(vfs_from_sb(sb), Q_XGETQSTAT, 0, (caddr_t)fqs); |
1da177e4 LT |
750 | } |
751 | ||
752 | STATIC int | |
a50cd269 | 753 | xfs_fs_setxstate( |
1da177e4 LT |
754 | struct super_block *sb, |
755 | unsigned int flags, | |
756 | int op) | |
757 | { | |
b83bd138 | 758 | return -bhv_vfs_quotactl(vfs_from_sb(sb), op, 0, (caddr_t)&flags); |
1da177e4 LT |
759 | } |
760 | ||
761 | STATIC int | |
a50cd269 | 762 | xfs_fs_getxquota( |
1da177e4 LT |
763 | struct super_block *sb, |
764 | int type, | |
765 | qid_t id, | |
766 | struct fs_disk_quota *fdq) | |
767 | { | |
b83bd138 NS |
768 | return -bhv_vfs_quotactl(vfs_from_sb(sb), |
769 | (type == USRQUOTA) ? Q_XGETQUOTA : | |
770 | ((type == GRPQUOTA) ? Q_XGETGQUOTA : | |
771 | Q_XGETPQUOTA), id, (caddr_t)fdq); | |
1da177e4 LT |
772 | } |
773 | ||
774 | STATIC int | |
a50cd269 | 775 | xfs_fs_setxquota( |
1da177e4 LT |
776 | struct super_block *sb, |
777 | int type, | |
778 | qid_t id, | |
779 | struct fs_disk_quota *fdq) | |
780 | { | |
b83bd138 NS |
781 | return -bhv_vfs_quotactl(vfs_from_sb(sb), |
782 | (type == USRQUOTA) ? Q_XSETQLIM : | |
783 | ((type == GRPQUOTA) ? Q_XSETGQLIM : | |
784 | Q_XSETPQLIM), id, (caddr_t)fdq); | |
1da177e4 LT |
785 | } |
786 | ||
787 | STATIC int | |
a50cd269 | 788 | xfs_fs_fill_super( |
1da177e4 LT |
789 | struct super_block *sb, |
790 | void *data, | |
791 | int silent) | |
792 | { | |
67fcaa73 | 793 | struct bhv_vnode *rootvp; |
b83bd138 | 794 | struct bhv_vfs *vfsp = vfs_allocate(sb); |
764d1f89 | 795 | struct xfs_mount_args *args = xfs_args_allocate(sb, silent); |
1da177e4 | 796 | struct kstatfs statvfs; |
b83bd138 | 797 | int error; |
1da177e4 | 798 | |
1da177e4 LT |
799 | bhv_insert_all_vfsops(vfsp); |
800 | ||
b83bd138 | 801 | error = bhv_vfs_parseargs(vfsp, (char *)data, args, 0); |
1da177e4 LT |
802 | if (error) { |
803 | bhv_remove_all_vfsops(vfsp, 1); | |
804 | goto fail_vfsop; | |
805 | } | |
806 | ||
807 | sb_min_blocksize(sb, BBSIZE); | |
a50cd269 | 808 | sb->s_export_op = &xfs_export_operations; |
a50cd269 NS |
809 | sb->s_qcop = &xfs_quotactl_operations; |
810 | sb->s_op = &xfs_super_operations; | |
1da177e4 | 811 | |
b83bd138 | 812 | error = bhv_vfs_mount(vfsp, args, NULL); |
1da177e4 LT |
813 | if (error) { |
814 | bhv_remove_all_vfsops(vfsp, 1); | |
815 | goto fail_vfsop; | |
816 | } | |
817 | ||
b83bd138 | 818 | error = bhv_vfs_statvfs(vfsp, &statvfs, NULL); |
1da177e4 LT |
819 | if (error) |
820 | goto fail_unmount; | |
821 | ||
822 | sb->s_dirt = 1; | |
823 | sb->s_magic = statvfs.f_type; | |
824 | sb->s_blocksize = statvfs.f_bsize; | |
825 | sb->s_blocksize_bits = ffs(statvfs.f_bsize) - 1; | |
826 | sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits); | |
827 | sb->s_time_gran = 1; | |
828 | set_posix_acl_flag(sb); | |
829 | ||
b83bd138 | 830 | error = bhv_vfs_root(vfsp, &rootvp); |
1da177e4 LT |
831 | if (error) |
832 | goto fail_unmount; | |
833 | ||
ec86dc02 | 834 | sb->s_root = d_alloc_root(vn_to_inode(rootvp)); |
1da177e4 LT |
835 | if (!sb->s_root) { |
836 | error = ENOMEM; | |
837 | goto fail_vnrele; | |
838 | } | |
839 | if (is_bad_inode(sb->s_root->d_inode)) { | |
840 | error = EINVAL; | |
841 | goto fail_vnrele; | |
842 | } | |
a50cd269 | 843 | if ((error = xfs_fs_start_syncd(vfsp))) |
1da177e4 LT |
844 | goto fail_vnrele; |
845 | vn_trace_exit(rootvp, __FUNCTION__, (inst_t *)__return_address); | |
846 | ||
847 | kmem_free(args, sizeof(*args)); | |
848 | return 0; | |
849 | ||
850 | fail_vnrele: | |
851 | if (sb->s_root) { | |
852 | dput(sb->s_root); | |
853 | sb->s_root = NULL; | |
854 | } else { | |
855 | VN_RELE(rootvp); | |
856 | } | |
857 | ||
858 | fail_unmount: | |
b83bd138 | 859 | bhv_vfs_unmount(vfsp, 0, NULL); |
1da177e4 LT |
860 | |
861 | fail_vfsop: | |
862 | vfs_deallocate(vfsp); | |
863 | kmem_free(args, sizeof(*args)); | |
864 | return -error; | |
865 | } | |
866 | ||
454e2398 | 867 | STATIC int |
a50cd269 | 868 | xfs_fs_get_sb( |
1da177e4 LT |
869 | struct file_system_type *fs_type, |
870 | int flags, | |
871 | const char *dev_name, | |
454e2398 DH |
872 | void *data, |
873 | struct vfsmount *mnt) | |
1da177e4 | 874 | { |
454e2398 DH |
875 | return get_sb_bdev(fs_type, flags, dev_name, data, xfs_fs_fill_super, |
876 | mnt); | |
a50cd269 NS |
877 | } |
878 | ||
7989cb8e | 879 | static struct super_operations xfs_super_operations = { |
a50cd269 NS |
880 | .alloc_inode = xfs_fs_alloc_inode, |
881 | .destroy_inode = xfs_fs_destroy_inode, | |
882 | .write_inode = xfs_fs_write_inode, | |
883 | .clear_inode = xfs_fs_clear_inode, | |
884 | .put_super = xfs_fs_put_super, | |
885 | .write_super = xfs_fs_write_super, | |
886 | .sync_fs = xfs_fs_sync_super, | |
887 | .write_super_lockfs = xfs_fs_lockfs, | |
888 | .statfs = xfs_fs_statfs, | |
889 | .remount_fs = xfs_fs_remount, | |
890 | .show_options = xfs_fs_show_options, | |
1da177e4 LT |
891 | }; |
892 | ||
7989cb8e | 893 | static struct quotactl_ops xfs_quotactl_operations = { |
a50cd269 NS |
894 | .quota_sync = xfs_fs_quotasync, |
895 | .get_xstate = xfs_fs_getxstate, | |
896 | .set_xstate = xfs_fs_setxstate, | |
897 | .get_xquota = xfs_fs_getxquota, | |
898 | .set_xquota = xfs_fs_setxquota, | |
1da177e4 LT |
899 | }; |
900 | ||
5085b607 | 901 | static struct file_system_type xfs_fs_type = { |
1da177e4 LT |
902 | .owner = THIS_MODULE, |
903 | .name = "xfs", | |
a50cd269 | 904 | .get_sb = xfs_fs_get_sb, |
1da177e4 LT |
905 | .kill_sb = kill_block_super, |
906 | .fs_flags = FS_REQUIRES_DEV, | |
907 | }; | |
908 | ||
909 | ||
910 | STATIC int __init | |
911 | init_xfs_fs( void ) | |
912 | { | |
913 | int error; | |
914 | struct sysinfo si; | |
915 | static char message[] __initdata = KERN_INFO \ | |
916 | XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled\n"; | |
917 | ||
918 | printk(message); | |
919 | ||
920 | si_meminfo(&si); | |
921 | xfs_physmem = si.totalram; | |
922 | ||
923 | ktrace_init(64); | |
924 | ||
8758280f | 925 | error = xfs_init_zones(); |
1da177e4 | 926 | if (error < 0) |
0829c360 | 927 | goto undo_zones; |
1da177e4 | 928 | |
ce8e922c | 929 | error = xfs_buf_init(); |
1da177e4 | 930 | if (error < 0) |
ce8e922c | 931 | goto undo_buffers; |
1da177e4 LT |
932 | |
933 | vn_init(); | |
934 | xfs_init(); | |
935 | uuid_init(); | |
936 | vfs_initquota(); | |
937 | ||
938 | error = register_filesystem(&xfs_fs_type); | |
939 | if (error) | |
940 | goto undo_register; | |
1da177e4 LT |
941 | return 0; |
942 | ||
943 | undo_register: | |
ce8e922c | 944 | xfs_buf_terminate(); |
1da177e4 | 945 | |
ce8e922c | 946 | undo_buffers: |
8758280f | 947 | xfs_destroy_zones(); |
1da177e4 | 948 | |
0829c360 | 949 | undo_zones: |
1da177e4 LT |
950 | return error; |
951 | } | |
952 | ||
953 | STATIC void __exit | |
954 | exit_xfs_fs( void ) | |
955 | { | |
956 | vfs_exitquota(); | |
1da177e4 LT |
957 | unregister_filesystem(&xfs_fs_type); |
958 | xfs_cleanup(); | |
ce8e922c | 959 | xfs_buf_terminate(); |
8758280f | 960 | xfs_destroy_zones(); |
1da177e4 LT |
961 | ktrace_uninit(); |
962 | } | |
963 | ||
964 | module_init(init_xfs_fs); | |
965 | module_exit(exit_xfs_fs); | |
966 | ||
967 | MODULE_AUTHOR("Silicon Graphics, Inc."); | |
968 | MODULE_DESCRIPTION(XFS_VERSION_STRING " with " XFS_BUILD_OPTIONS " enabled"); | |
969 | MODULE_LICENSE("GPL"); |