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1 | /* |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. |
3 | * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved. |
4 | * |
5 | * This copyrighted material is made available to anyone wishing to use, |
6 | * modify, copy, or redistribute it subject to the terms and conditions |
7 | * of the GNU General Public License version 2. |
8 | */ |
9 | |
10 | #include <linux/sched.h> |
11 | #include <linux/slab.h> |
12 | #include <linux/spinlock.h> |
13 | #include <linux/completion.h> |
14 | #include <linux/buffer_head.h> |
15 | #include <linux/blkdev.h> |
16 | #include <linux/kthread.h> |
17 | #include <linux/namei.h> |
18 | #include <linux/mount.h> |
19 | #include <linux/gfs2_ondisk.h> |
20 | #include <linux/quotaops.h> |
21 | |
22 | #include "gfs2.h" |
23 | #include "incore.h" |
24 | #include "bmap.h" |
25 | #include "glock.h" |
26 | #include "glops.h" |
27 | #include "inode.h" |
28 | #include "recovery.h" |
29 | #include "rgrp.h" |
30 | #include "super.h" |
31 | #include "sys.h" |
32 | #include "util.h" |
33 | #include "log.h" |
34 | #include "quota.h" |
35 | #include "dir.h" |
36 | #include "trace_gfs2.h" |
37 | |
38 | #define DO 0 |
39 | #define UNDO 1 |
40 | |
41 | /** |
42 | * gfs2_tune_init - Fill a gfs2_tune structure with default values |
43 | * @gt: tune |
44 | * |
45 | */ |
46 | |
47 | static void gfs2_tune_init(struct gfs2_tune *gt) |
48 | { |
49 | spin_lock_init(>->gt_spin); |
50 | |
51 | gt->gt_quota_simul_sync = 64; |
52 | gt->gt_quota_warn_period = 10; |
53 | gt->gt_quota_scale_num = 1; |
54 | gt->gt_quota_scale_den = 1; |
55 | gt->gt_new_files_jdata = 0; |
56 | gt->gt_max_readahead = 1 << 18; |
57 | gt->gt_complain_secs = 10; |
58 | } |
59 | |
60 | static struct gfs2_sbd *init_sbd(struct super_block *sb) |
61 | { |
62 | struct gfs2_sbd *sdp; |
63 | |
64 | sdp = kzalloc(sizeof(struct gfs2_sbd), GFP_KERNEL); |
65 | if (!sdp) |
66 | return NULL; |
67 | |
68 | sb->s_fs_info = sdp; |
69 | sdp->sd_vfs = sb; |
70 | set_bit(SDF_NOJOURNALID, &sdp->sd_flags); |
71 | gfs2_tune_init(&sdp->sd_tune); |
72 | |
73 | init_waitqueue_head(&sdp->sd_glock_wait); |
74 | atomic_set(&sdp->sd_glock_disposal, 0); |
75 | init_completion(&sdp->sd_locking_init); |
76 | spin_lock_init(&sdp->sd_statfs_spin); |
77 | |
78 | spin_lock_init(&sdp->sd_rindex_spin); |
79 | mutex_init(&sdp->sd_rindex_mutex); |
80 | INIT_LIST_HEAD(&sdp->sd_rindex_list); |
81 | INIT_LIST_HEAD(&sdp->sd_rindex_mru_list); |
82 | |
83 | INIT_LIST_HEAD(&sdp->sd_jindex_list); |
84 | spin_lock_init(&sdp->sd_jindex_spin); |
85 | mutex_init(&sdp->sd_jindex_mutex); |
86 | |
87 | INIT_LIST_HEAD(&sdp->sd_quota_list); |
88 | mutex_init(&sdp->sd_quota_mutex); |
89 | init_waitqueue_head(&sdp->sd_quota_wait); |
90 | INIT_LIST_HEAD(&sdp->sd_trunc_list); |
91 | spin_lock_init(&sdp->sd_trunc_lock); |
92 | |
93 | spin_lock_init(&sdp->sd_log_lock); |
94 | atomic_set(&sdp->sd_log_pinned, 0); |
95 | INIT_LIST_HEAD(&sdp->sd_log_le_buf); |
96 | INIT_LIST_HEAD(&sdp->sd_log_le_revoke); |
97 | INIT_LIST_HEAD(&sdp->sd_log_le_rg); |
98 | INIT_LIST_HEAD(&sdp->sd_log_le_databuf); |
99 | INIT_LIST_HEAD(&sdp->sd_log_le_ordered); |
100 | |
101 | init_waitqueue_head(&sdp->sd_log_waitq); |
102 | init_waitqueue_head(&sdp->sd_logd_waitq); |
103 | spin_lock_init(&sdp->sd_ail_lock); |
104 | INIT_LIST_HEAD(&sdp->sd_ail1_list); |
105 | INIT_LIST_HEAD(&sdp->sd_ail2_list); |
106 | |
107 | init_rwsem(&sdp->sd_log_flush_lock); |
108 | atomic_set(&sdp->sd_log_in_flight, 0); |
109 | init_waitqueue_head(&sdp->sd_log_flush_wait); |
110 | |
111 | INIT_LIST_HEAD(&sdp->sd_revoke_list); |
112 | |
113 | mutex_init(&sdp->sd_freeze_lock); |
114 | |
115 | return sdp; |
116 | } |
117 | |
118 | |
119 | /** |
120 | * gfs2_check_sb - Check superblock |
121 | * @sdp: the filesystem |
122 | * @sb: The superblock |
123 | * @silent: Don't print a message if the check fails |
124 | * |
125 | * Checks the version code of the FS is one that we understand how to |
126 | * read and that the sizes of the various on-disk structures have not |
127 | * changed. |
128 | */ |
129 | |
130 | static int gfs2_check_sb(struct gfs2_sbd *sdp, int silent) |
131 | { |
132 | struct gfs2_sb_host *sb = &sdp->sd_sb; |
133 | |
134 | if (sb->sb_magic != GFS2_MAGIC || |
135 | sb->sb_type != GFS2_METATYPE_SB) { |
136 | if (!silent) |
137 | printk(KERN_WARNING "GFS2: not a GFS2 filesystem\n"); |
138 | return -EINVAL; |
139 | } |
140 | |
141 | /* If format numbers match exactly, we're done. */ |
142 | |
143 | if (sb->sb_fs_format == GFS2_FORMAT_FS && |
144 | sb->sb_multihost_format == GFS2_FORMAT_MULTI) |
145 | return 0; |
146 | |
147 | fs_warn(sdp, "Unknown on-disk format, unable to mount\n"); |
148 | |
149 | return -EINVAL; |
150 | } |
151 | |
152 | static void end_bio_io_page(struct bio *bio, int error) |
153 | { |
154 | struct page *page = bio->bi_private; |
155 | |
156 | if (!error) |
157 | SetPageUptodate(page); |
158 | else |
159 | printk(KERN_WARNING "gfs2: error %d reading superblock\n", error); |
160 | unlock_page(page); |
161 | } |
162 | |
163 | static void gfs2_sb_in(struct gfs2_sbd *sdp, const void *buf) |
164 | { |
165 | struct gfs2_sb_host *sb = &sdp->sd_sb; |
166 | struct super_block *s = sdp->sd_vfs; |
167 | const struct gfs2_sb *str = buf; |
168 | |
169 | sb->sb_magic = be32_to_cpu(str->sb_header.mh_magic); |
170 | sb->sb_type = be32_to_cpu(str->sb_header.mh_type); |
171 | sb->sb_format = be32_to_cpu(str->sb_header.mh_format); |
172 | sb->sb_fs_format = be32_to_cpu(str->sb_fs_format); |
173 | sb->sb_multihost_format = be32_to_cpu(str->sb_multihost_format); |
174 | sb->sb_bsize = be32_to_cpu(str->sb_bsize); |
175 | sb->sb_bsize_shift = be32_to_cpu(str->sb_bsize_shift); |
176 | sb->sb_master_dir.no_addr = be64_to_cpu(str->sb_master_dir.no_addr); |
177 | sb->sb_master_dir.no_formal_ino = be64_to_cpu(str->sb_master_dir.no_formal_ino); |
178 | sb->sb_root_dir.no_addr = be64_to_cpu(str->sb_root_dir.no_addr); |
179 | sb->sb_root_dir.no_formal_ino = be64_to_cpu(str->sb_root_dir.no_formal_ino); |
180 | |
181 | memcpy(sb->sb_lockproto, str->sb_lockproto, GFS2_LOCKNAME_LEN); |
182 | memcpy(sb->sb_locktable, str->sb_locktable, GFS2_LOCKNAME_LEN); |
183 | memcpy(s->s_uuid, str->sb_uuid, 16); |
184 | } |
185 | |
186 | /** |
187 | * gfs2_read_super - Read the gfs2 super block from disk |
188 | * @sdp: The GFS2 super block |
189 | * @sector: The location of the super block |
190 | * @error: The error code to return |
191 | * |
192 | * This uses the bio functions to read the super block from disk |
193 | * because we want to be 100% sure that we never read cached data. |
194 | * A super block is read twice only during each GFS2 mount and is |
195 | * never written to by the filesystem. The first time its read no |
196 | * locks are held, and the only details which are looked at are those |
197 | * relating to the locking protocol. Once locking is up and working, |
198 | * the sb is read again under the lock to establish the location of |
199 | * the master directory (contains pointers to journals etc) and the |
200 | * root directory. |
201 | * |
202 | * Returns: 0 on success or error |
203 | */ |
204 | |
205 | static int gfs2_read_super(struct gfs2_sbd *sdp, sector_t sector, int silent) |
206 | { |
207 | struct super_block *sb = sdp->sd_vfs; |
208 | struct gfs2_sb *p; |
209 | struct page *page; |
210 | struct bio *bio; |
211 | |
212 | page = alloc_page(GFP_NOFS); |
213 | if (unlikely(!page)) |
214 | return -ENOBUFS; |
215 | |
216 | ClearPageUptodate(page); |
217 | ClearPageDirty(page); |
218 | lock_page(page); |
219 | |
220 | bio = bio_alloc(GFP_NOFS, 1); |
221 | bio->bi_sector = sector * (sb->s_blocksize >> 9); |
222 | bio->bi_bdev = sb->s_bdev; |
223 | bio_add_page(bio, page, PAGE_SIZE, 0); |
224 | |
225 | bio->bi_end_io = end_bio_io_page; |
226 | bio->bi_private = page; |
227 | submit_bio(READ_SYNC | REQ_META, bio); |
228 | wait_on_page_locked(page); |
229 | bio_put(bio); |
230 | if (!PageUptodate(page)) { |
231 | __free_page(page); |
232 | return -EIO; |
233 | } |
234 | p = kmap(page); |
235 | gfs2_sb_in(sdp, p); |
236 | kunmap(page); |
237 | __free_page(page); |
238 | return gfs2_check_sb(sdp, silent); |
239 | } |
240 | |
241 | /** |
242 | * gfs2_read_sb - Read super block |
243 | * @sdp: The GFS2 superblock |
244 | * @silent: Don't print message if mount fails |
245 | * |
246 | */ |
247 | |
248 | static int gfs2_read_sb(struct gfs2_sbd *sdp, int silent) |
249 | { |
250 | u32 hash_blocks, ind_blocks, leaf_blocks; |
251 | u32 tmp_blocks; |
252 | unsigned int x; |
253 | int error; |
254 | |
255 | error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift, silent); |
256 | if (error) { |
257 | if (!silent) |
258 | fs_err(sdp, "can't read superblock\n"); |
259 | return error; |
260 | } |
261 | |
262 | sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift - |
263 | GFS2_BASIC_BLOCK_SHIFT; |
264 | sdp->sd_fsb2bb = 1 << sdp->sd_fsb2bb_shift; |
265 | sdp->sd_diptrs = (sdp->sd_sb.sb_bsize - |
266 | sizeof(struct gfs2_dinode)) / sizeof(u64); |
267 | sdp->sd_inptrs = (sdp->sd_sb.sb_bsize - |
268 | sizeof(struct gfs2_meta_header)) / sizeof(u64); |
269 | sdp->sd_jbsize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_meta_header); |
270 | sdp->sd_hash_bsize = sdp->sd_sb.sb_bsize / 2; |
271 | sdp->sd_hash_bsize_shift = sdp->sd_sb.sb_bsize_shift - 1; |
272 | sdp->sd_hash_ptrs = sdp->sd_hash_bsize / sizeof(u64); |
273 | sdp->sd_qc_per_block = (sdp->sd_sb.sb_bsize - |
274 | sizeof(struct gfs2_meta_header)) / |
275 | sizeof(struct gfs2_quota_change); |
276 | |
277 | /* Compute maximum reservation required to add a entry to a directory */ |
278 | |
279 | hash_blocks = DIV_ROUND_UP(sizeof(u64) * (1 << GFS2_DIR_MAX_DEPTH), |
280 | sdp->sd_jbsize); |
281 | |
282 | ind_blocks = 0; |
283 | for (tmp_blocks = hash_blocks; tmp_blocks > sdp->sd_diptrs;) { |
284 | tmp_blocks = DIV_ROUND_UP(tmp_blocks, sdp->sd_inptrs); |
285 | ind_blocks += tmp_blocks; |
286 | } |
287 | |
288 | leaf_blocks = 2 + GFS2_DIR_MAX_DEPTH; |
289 | |
290 | sdp->sd_max_dirres = hash_blocks + ind_blocks + leaf_blocks; |
291 | |
292 | sdp->sd_heightsize[0] = sdp->sd_sb.sb_bsize - |
293 | sizeof(struct gfs2_dinode); |
294 | sdp->sd_heightsize[1] = sdp->sd_sb.sb_bsize * sdp->sd_diptrs; |
295 | for (x = 2;; x++) { |
296 | u64 space, d; |
297 | u32 m; |
298 | |
299 | space = sdp->sd_heightsize[x - 1] * sdp->sd_inptrs; |
300 | d = space; |
301 | m = do_div(d, sdp->sd_inptrs); |
302 | |
303 | if (d != sdp->sd_heightsize[x - 1] || m) |
304 | break; |
305 | sdp->sd_heightsize[x] = space; |
306 | } |
307 | sdp->sd_max_height = x; |
308 | sdp->sd_heightsize[x] = ~0; |
309 | gfs2_assert(sdp, sdp->sd_max_height <= GFS2_MAX_META_HEIGHT); |
310 | |
311 | sdp->sd_jheightsize[0] = sdp->sd_sb.sb_bsize - |
312 | sizeof(struct gfs2_dinode); |
313 | sdp->sd_jheightsize[1] = sdp->sd_jbsize * sdp->sd_diptrs; |
314 | for (x = 2;; x++) { |
315 | u64 space, d; |
316 | u32 m; |
317 | |
318 | space = sdp->sd_jheightsize[x - 1] * sdp->sd_inptrs; |
319 | d = space; |
320 | m = do_div(d, sdp->sd_inptrs); |
321 | |
322 | if (d != sdp->sd_jheightsize[x - 1] || m) |
323 | break; |
324 | sdp->sd_jheightsize[x] = space; |
325 | } |
326 | sdp->sd_max_jheight = x; |
327 | sdp->sd_jheightsize[x] = ~0; |
328 | gfs2_assert(sdp, sdp->sd_max_jheight <= GFS2_MAX_META_HEIGHT); |
329 | |
330 | return 0; |
331 | } |
332 | |
333 | static int init_names(struct gfs2_sbd *sdp, int silent) |
334 | { |
335 | char *proto, *table; |
336 | int error = 0; |
337 | |
338 | proto = sdp->sd_args.ar_lockproto; |
339 | table = sdp->sd_args.ar_locktable; |
340 | |
341 | /* Try to autodetect */ |
342 | |
343 | if (!proto[0] || !table[0]) { |
344 | error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift, silent); |
345 | if (error) |
346 | return error; |
347 | |
348 | if (!proto[0]) |
349 | proto = sdp->sd_sb.sb_lockproto; |
350 | if (!table[0]) |
351 | table = sdp->sd_sb.sb_locktable; |
352 | } |
353 | |
354 | if (!table[0]) |
355 | table = sdp->sd_vfs->s_id; |
356 | |
357 | strlcpy(sdp->sd_proto_name, proto, GFS2_FSNAME_LEN); |
358 | strlcpy(sdp->sd_table_name, table, GFS2_FSNAME_LEN); |
359 | |
360 | table = sdp->sd_table_name; |
361 | while ((table = strchr(table, '/'))) |
362 | *table = '_'; |
363 | |
364 | return error; |
365 | } |
366 | |
367 | static int init_locking(struct gfs2_sbd *sdp, struct gfs2_holder *mount_gh, |
368 | int undo) |
369 | { |
370 | int error = 0; |
371 | |
372 | if (undo) |
373 | goto fail_trans; |
374 | |
375 | error = gfs2_glock_nq_num(sdp, |
376 | GFS2_MOUNT_LOCK, &gfs2_nondisk_glops, |
377 | LM_ST_EXCLUSIVE, LM_FLAG_NOEXP | GL_NOCACHE, |
378 | mount_gh); |
379 | if (error) { |
380 | fs_err(sdp, "can't acquire mount glock: %d\n", error); |
381 | goto fail; |
382 | } |
383 | |
384 | error = gfs2_glock_nq_num(sdp, |
385 | GFS2_LIVE_LOCK, &gfs2_nondisk_glops, |
386 | LM_ST_SHARED, |
387 | LM_FLAG_NOEXP | GL_EXACT, |
388 | &sdp->sd_live_gh); |
389 | if (error) { |
390 | fs_err(sdp, "can't acquire live glock: %d\n", error); |
391 | goto fail_mount; |
392 | } |
393 | |
394 | error = gfs2_glock_get(sdp, GFS2_RENAME_LOCK, &gfs2_nondisk_glops, |
395 | CREATE, &sdp->sd_rename_gl); |
396 | if (error) { |
397 | fs_err(sdp, "can't create rename glock: %d\n", error); |
398 | goto fail_live; |
399 | } |
400 | |
401 | error = gfs2_glock_get(sdp, GFS2_TRANS_LOCK, &gfs2_trans_glops, |
402 | CREATE, &sdp->sd_trans_gl); |
403 | if (error) { |
404 | fs_err(sdp, "can't create transaction glock: %d\n", error); |
405 | goto fail_rename; |
406 | } |
407 | |
408 | return 0; |
409 | |
410 | fail_trans: |
411 | gfs2_glock_put(sdp->sd_trans_gl); |
412 | fail_rename: |
413 | gfs2_glock_put(sdp->sd_rename_gl); |
414 | fail_live: |
415 | gfs2_glock_dq_uninit(&sdp->sd_live_gh); |
416 | fail_mount: |
417 | gfs2_glock_dq_uninit(mount_gh); |
418 | fail: |
419 | return error; |
420 | } |
421 | |
422 | static int gfs2_lookup_root(struct super_block *sb, struct dentry **dptr, |
423 | u64 no_addr, const char *name) |
424 | { |
425 | struct gfs2_sbd *sdp = sb->s_fs_info; |
426 | struct dentry *dentry; |
427 | struct inode *inode; |
428 | |
429 | inode = gfs2_inode_lookup(sb, DT_DIR, no_addr, 0, 0); |
430 | if (IS_ERR(inode)) { |
431 | fs_err(sdp, "can't read in %s inode: %ld\n", name, PTR_ERR(inode)); |
432 | return PTR_ERR(inode); |
433 | } |
434 | dentry = d_alloc_root(inode); |
435 | if (!dentry) { |
436 | fs_err(sdp, "can't alloc %s dentry\n", name); |
437 | iput(inode); |
438 | return -ENOMEM; |
439 | } |
440 | *dptr = dentry; |
441 | return 0; |
442 | } |
443 | |
444 | static int init_sb(struct gfs2_sbd *sdp, int silent) |
445 | { |
446 | struct super_block *sb = sdp->sd_vfs; |
447 | struct gfs2_holder sb_gh; |
448 | u64 no_addr; |
449 | int ret; |
450 | |
451 | ret = gfs2_glock_nq_num(sdp, GFS2_SB_LOCK, &gfs2_meta_glops, |
452 | LM_ST_SHARED, 0, &sb_gh); |
453 | if (ret) { |
454 | fs_err(sdp, "can't acquire superblock glock: %d\n", ret); |
455 | return ret; |
456 | } |
457 | |
458 | ret = gfs2_read_sb(sdp, silent); |
459 | if (ret) { |
460 | fs_err(sdp, "can't read superblock: %d\n", ret); |
461 | goto out; |
462 | } |
463 | |
464 | /* Set up the buffer cache and SB for real */ |
465 | if (sdp->sd_sb.sb_bsize < bdev_logical_block_size(sb->s_bdev)) { |
466 | ret = -EINVAL; |
467 | fs_err(sdp, "FS block size (%u) is too small for device " |
468 | "block size (%u)\n", |
469 | sdp->sd_sb.sb_bsize, bdev_logical_block_size(sb->s_bdev)); |
470 | goto out; |
471 | } |
472 | if (sdp->sd_sb.sb_bsize > PAGE_SIZE) { |
473 | ret = -EINVAL; |
474 | fs_err(sdp, "FS block size (%u) is too big for machine " |
475 | "page size (%u)\n", |
476 | sdp->sd_sb.sb_bsize, (unsigned int)PAGE_SIZE); |
477 | goto out; |
478 | } |
479 | sb_set_blocksize(sb, sdp->sd_sb.sb_bsize); |
480 | |
481 | /* Get the root inode */ |
482 | no_addr = sdp->sd_sb.sb_root_dir.no_addr; |
483 | ret = gfs2_lookup_root(sb, &sdp->sd_root_dir, no_addr, "root"); |
484 | if (ret) |
485 | goto out; |
486 | |
487 | /* Get the master inode */ |
488 | no_addr = sdp->sd_sb.sb_master_dir.no_addr; |
489 | ret = gfs2_lookup_root(sb, &sdp->sd_master_dir, no_addr, "master"); |
490 | if (ret) { |
491 | dput(sdp->sd_root_dir); |
492 | goto out; |
493 | } |
494 | sb->s_root = dget(sdp->sd_args.ar_meta ? sdp->sd_master_dir : sdp->sd_root_dir); |
495 | out: |
496 | gfs2_glock_dq_uninit(&sb_gh); |
497 | return ret; |
498 | } |
499 | |
500 | /** |
501 | * map_journal_extents - create a reusable "extent" mapping from all logical |
502 | * blocks to all physical blocks for the given journal. This will save |
503 | * us time when writing journal blocks. Most journals will have only one |
504 | * extent that maps all their logical blocks. That's because gfs2.mkfs |
505 | * arranges the journal blocks sequentially to maximize performance. |
506 | * So the extent would map the first block for the entire file length. |
507 | * However, gfs2_jadd can happen while file activity is happening, so |
508 | * those journals may not be sequential. Less likely is the case where |
509 | * the users created their own journals by mounting the metafs and |
510 | * laying it out. But it's still possible. These journals might have |
511 | * several extents. |
512 | * |
513 | * TODO: This should be done in bigger chunks rather than one block at a time, |
514 | * but since it's only done at mount time, I'm not worried about the |
515 | * time it takes. |
516 | */ |
517 | static int map_journal_extents(struct gfs2_sbd *sdp) |
518 | { |
519 | struct gfs2_jdesc *jd = sdp->sd_jdesc; |
520 | unsigned int lb; |
521 | u64 db, prev_db; /* logical block, disk block, prev disk block */ |
522 | struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
523 | struct gfs2_journal_extent *jext = NULL; |
524 | struct buffer_head bh; |
525 | int rc = 0; |
526 | |
527 | prev_db = 0; |
528 | |
529 | for (lb = 0; lb < i_size_read(jd->jd_inode) >> sdp->sd_sb.sb_bsize_shift; lb++) { |
530 | bh.b_state = 0; |
531 | bh.b_blocknr = 0; |
532 | bh.b_size = 1 << ip->i_inode.i_blkbits; |
533 | rc = gfs2_block_map(jd->jd_inode, lb, &bh, 0); |
534 | db = bh.b_blocknr; |
535 | if (rc || !db) { |
536 | printk(KERN_INFO "GFS2 journal mapping error %d: lb=" |
537 | "%u db=%llu\n", rc, lb, (unsigned long long)db); |
538 | break; |
539 | } |
540 | if (!prev_db || db != prev_db + 1) { |
541 | jext = kzalloc(sizeof(struct gfs2_journal_extent), |
542 | GFP_KERNEL); |
543 | if (!jext) { |
544 | printk(KERN_INFO "GFS2 error: out of memory " |
545 | "mapping journal extents.\n"); |
546 | rc = -ENOMEM; |
547 | break; |
548 | } |
549 | jext->dblock = db; |
550 | jext->lblock = lb; |
551 | jext->blocks = 1; |
552 | list_add_tail(&jext->extent_list, &jd->extent_list); |
553 | } else { |
554 | jext->blocks++; |
555 | } |
556 | prev_db = db; |
557 | } |
558 | return rc; |
559 | } |
560 | |
561 | static void gfs2_others_may_mount(struct gfs2_sbd *sdp) |
562 | { |
563 | char *message = "FIRSTMOUNT=Done"; |
564 | char *envp[] = { message, NULL }; |
565 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; |
566 | ls->ls_first_done = 1; |
567 | kobject_uevent_env(&sdp->sd_kobj, KOBJ_CHANGE, envp); |
568 | } |
569 | |
570 | /** |
571 | * gfs2_jindex_hold - Grab a lock on the jindex |
572 | * @sdp: The GFS2 superblock |
573 | * @ji_gh: the holder for the jindex glock |
574 | * |
575 | * Returns: errno |
576 | */ |
577 | |
578 | static int gfs2_jindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ji_gh) |
579 | { |
580 | struct gfs2_inode *dip = GFS2_I(sdp->sd_jindex); |
581 | struct qstr name; |
582 | char buf[20]; |
583 | struct gfs2_jdesc *jd; |
584 | int error; |
585 | |
586 | name.name = buf; |
587 | |
588 | mutex_lock(&sdp->sd_jindex_mutex); |
589 | |
590 | for (;;) { |
591 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, ji_gh); |
592 | if (error) |
593 | break; |
594 | |
595 | name.len = sprintf(buf, "journal%u", sdp->sd_journals); |
596 | name.hash = gfs2_disk_hash(name.name, name.len); |
597 | |
598 | error = gfs2_dir_check(sdp->sd_jindex, &name, NULL); |
599 | if (error == -ENOENT) { |
600 | error = 0; |
601 | break; |
602 | } |
603 | |
604 | gfs2_glock_dq_uninit(ji_gh); |
605 | |
606 | if (error) |
607 | break; |
608 | |
609 | error = -ENOMEM; |
610 | jd = kzalloc(sizeof(struct gfs2_jdesc), GFP_KERNEL); |
611 | if (!jd) |
612 | break; |
613 | |
614 | INIT_LIST_HEAD(&jd->extent_list); |
615 | INIT_WORK(&jd->jd_work, gfs2_recover_func); |
616 | jd->jd_inode = gfs2_lookupi(sdp->sd_jindex, &name, 1); |
617 | if (!jd->jd_inode || IS_ERR(jd->jd_inode)) { |
618 | if (!jd->jd_inode) |
619 | error = -ENOENT; |
620 | else |
621 | error = PTR_ERR(jd->jd_inode); |
622 | kfree(jd); |
623 | break; |
624 | } |
625 | |
626 | spin_lock(&sdp->sd_jindex_spin); |
627 | jd->jd_jid = sdp->sd_journals++; |
628 | list_add_tail(&jd->jd_list, &sdp->sd_jindex_list); |
629 | spin_unlock(&sdp->sd_jindex_spin); |
630 | } |
631 | |
632 | mutex_unlock(&sdp->sd_jindex_mutex); |
633 | |
634 | return error; |
635 | } |
636 | |
637 | static int init_journal(struct gfs2_sbd *sdp, int undo) |
638 | { |
639 | struct inode *master = sdp->sd_master_dir->d_inode; |
640 | struct gfs2_holder ji_gh; |
641 | struct gfs2_inode *ip; |
642 | int jindex = 1; |
643 | int error = 0; |
644 | |
645 | if (undo) { |
646 | jindex = 0; |
647 | goto fail_jinode_gh; |
648 | } |
649 | |
650 | sdp->sd_jindex = gfs2_lookup_simple(master, "jindex"); |
651 | if (IS_ERR(sdp->sd_jindex)) { |
652 | fs_err(sdp, "can't lookup journal index: %d\n", error); |
653 | return PTR_ERR(sdp->sd_jindex); |
654 | } |
655 | ip = GFS2_I(sdp->sd_jindex); |
656 | |
657 | /* Load in the journal index special file */ |
658 | |
659 | error = gfs2_jindex_hold(sdp, &ji_gh); |
660 | if (error) { |
661 | fs_err(sdp, "can't read journal index: %d\n", error); |
662 | goto fail; |
663 | } |
664 | |
665 | error = -EUSERS; |
666 | if (!gfs2_jindex_size(sdp)) { |
667 | fs_err(sdp, "no journals!\n"); |
668 | goto fail_jindex; |
669 | } |
670 | |
671 | if (sdp->sd_args.ar_spectator) { |
672 | sdp->sd_jdesc = gfs2_jdesc_find(sdp, 0); |
673 | atomic_set(&sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks); |
674 | atomic_set(&sdp->sd_log_thresh1, 2*sdp->sd_jdesc->jd_blocks/5); |
675 | atomic_set(&sdp->sd_log_thresh2, 4*sdp->sd_jdesc->jd_blocks/5); |
676 | } else { |
677 | if (sdp->sd_lockstruct.ls_jid >= gfs2_jindex_size(sdp)) { |
678 | fs_err(sdp, "can't mount journal #%u\n", |
679 | sdp->sd_lockstruct.ls_jid); |
680 | fs_err(sdp, "there are only %u journals (0 - %u)\n", |
681 | gfs2_jindex_size(sdp), |
682 | gfs2_jindex_size(sdp) - 1); |
683 | goto fail_jindex; |
684 | } |
685 | sdp->sd_jdesc = gfs2_jdesc_find(sdp, sdp->sd_lockstruct.ls_jid); |
686 | |
687 | error = gfs2_glock_nq_num(sdp, sdp->sd_lockstruct.ls_jid, |
688 | &gfs2_journal_glops, |
689 | LM_ST_EXCLUSIVE, LM_FLAG_NOEXP, |
690 | &sdp->sd_journal_gh); |
691 | if (error) { |
692 | fs_err(sdp, "can't acquire journal glock: %d\n", error); |
693 | goto fail_jindex; |
694 | } |
695 | |
696 | ip = GFS2_I(sdp->sd_jdesc->jd_inode); |
697 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, |
698 | LM_FLAG_NOEXP | GL_EXACT | GL_NOCACHE, |
699 | &sdp->sd_jinode_gh); |
700 | if (error) { |
701 | fs_err(sdp, "can't acquire journal inode glock: %d\n", |
702 | error); |
703 | goto fail_journal_gh; |
704 | } |
705 | |
706 | error = gfs2_jdesc_check(sdp->sd_jdesc); |
707 | if (error) { |
708 | fs_err(sdp, "my journal (%u) is bad: %d\n", |
709 | sdp->sd_jdesc->jd_jid, error); |
710 | goto fail_jinode_gh; |
711 | } |
712 | atomic_set(&sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks); |
713 | atomic_set(&sdp->sd_log_thresh1, 2*sdp->sd_jdesc->jd_blocks/5); |
714 | atomic_set(&sdp->sd_log_thresh2, 4*sdp->sd_jdesc->jd_blocks/5); |
715 | |
716 | /* Map the extents for this journal's blocks */ |
717 | map_journal_extents(sdp); |
718 | } |
719 | trace_gfs2_log_blocks(sdp, atomic_read(&sdp->sd_log_blks_free)); |
720 | |
721 | if (sdp->sd_lockstruct.ls_first) { |
722 | unsigned int x; |
723 | for (x = 0; x < sdp->sd_journals; x++) { |
724 | error = gfs2_recover_journal(gfs2_jdesc_find(sdp, x), |
725 | true); |
726 | if (error) { |
727 | fs_err(sdp, "error recovering journal %u: %d\n", |
728 | x, error); |
729 | goto fail_jinode_gh; |
730 | } |
731 | } |
732 | |
733 | gfs2_others_may_mount(sdp); |
734 | } else if (!sdp->sd_args.ar_spectator) { |
735 | error = gfs2_recover_journal(sdp->sd_jdesc, true); |
736 | if (error) { |
737 | fs_err(sdp, "error recovering my journal: %d\n", error); |
738 | goto fail_jinode_gh; |
739 | } |
740 | } |
741 | |
742 | set_bit(SDF_JOURNAL_CHECKED, &sdp->sd_flags); |
743 | gfs2_glock_dq_uninit(&ji_gh); |
744 | jindex = 0; |
745 | |
746 | return 0; |
747 | |
748 | fail_jinode_gh: |
749 | if (!sdp->sd_args.ar_spectator) |
750 | gfs2_glock_dq_uninit(&sdp->sd_jinode_gh); |
751 | fail_journal_gh: |
752 | if (!sdp->sd_args.ar_spectator) |
753 | gfs2_glock_dq_uninit(&sdp->sd_journal_gh); |
754 | fail_jindex: |
755 | gfs2_jindex_free(sdp); |
756 | if (jindex) |
757 | gfs2_glock_dq_uninit(&ji_gh); |
758 | fail: |
759 | iput(sdp->sd_jindex); |
760 | return error; |
761 | } |
762 | |
763 | |
764 | static int init_inodes(struct gfs2_sbd *sdp, int undo) |
765 | { |
766 | int error = 0; |
767 | struct gfs2_inode *ip; |
768 | struct inode *master = sdp->sd_master_dir->d_inode; |
769 | |
770 | if (undo) |
771 | goto fail_qinode; |
772 | |
773 | error = init_journal(sdp, undo); |
774 | if (error) |
775 | goto fail; |
776 | |
777 | /* Read in the master statfs inode */ |
778 | sdp->sd_statfs_inode = gfs2_lookup_simple(master, "statfs"); |
779 | if (IS_ERR(sdp->sd_statfs_inode)) { |
780 | error = PTR_ERR(sdp->sd_statfs_inode); |
781 | fs_err(sdp, "can't read in statfs inode: %d\n", error); |
782 | goto fail_journal; |
783 | } |
784 | |
785 | /* Read in the resource index inode */ |
786 | sdp->sd_rindex = gfs2_lookup_simple(master, "rindex"); |
787 | if (IS_ERR(sdp->sd_rindex)) { |
788 | error = PTR_ERR(sdp->sd_rindex); |
789 | fs_err(sdp, "can't get resource index inode: %d\n", error); |
790 | goto fail_statfs; |
791 | } |
792 | ip = GFS2_I(sdp->sd_rindex); |
793 | sdp->sd_rindex_uptodate = 0; |
794 | |
795 | /* Read in the quota inode */ |
796 | sdp->sd_quota_inode = gfs2_lookup_simple(master, "quota"); |
797 | if (IS_ERR(sdp->sd_quota_inode)) { |
798 | error = PTR_ERR(sdp->sd_quota_inode); |
799 | fs_err(sdp, "can't get quota file inode: %d\n", error); |
800 | goto fail_rindex; |
801 | } |
802 | return 0; |
803 | |
804 | fail_qinode: |
805 | iput(sdp->sd_quota_inode); |
806 | fail_rindex: |
807 | gfs2_clear_rgrpd(sdp); |
808 | iput(sdp->sd_rindex); |
809 | fail_statfs: |
810 | iput(sdp->sd_statfs_inode); |
811 | fail_journal: |
812 | init_journal(sdp, UNDO); |
813 | fail: |
814 | return error; |
815 | } |
816 | |
817 | static int init_per_node(struct gfs2_sbd *sdp, int undo) |
818 | { |
819 | struct inode *pn = NULL; |
820 | char buf[30]; |
821 | int error = 0; |
822 | struct gfs2_inode *ip; |
823 | struct inode *master = sdp->sd_master_dir->d_inode; |
824 | |
825 | if (sdp->sd_args.ar_spectator) |
826 | return 0; |
827 | |
828 | if (undo) |
829 | goto fail_qc_gh; |
830 | |
831 | pn = gfs2_lookup_simple(master, "per_node"); |
832 | if (IS_ERR(pn)) { |
833 | error = PTR_ERR(pn); |
834 | fs_err(sdp, "can't find per_node directory: %d\n", error); |
835 | return error; |
836 | } |
837 | |
838 | sprintf(buf, "statfs_change%u", sdp->sd_jdesc->jd_jid); |
839 | sdp->sd_sc_inode = gfs2_lookup_simple(pn, buf); |
840 | if (IS_ERR(sdp->sd_sc_inode)) { |
841 | error = PTR_ERR(sdp->sd_sc_inode); |
842 | fs_err(sdp, "can't find local \"sc\" file: %d\n", error); |
843 | goto fail; |
844 | } |
845 | |
846 | sprintf(buf, "quota_change%u", sdp->sd_jdesc->jd_jid); |
847 | sdp->sd_qc_inode = gfs2_lookup_simple(pn, buf); |
848 | if (IS_ERR(sdp->sd_qc_inode)) { |
849 | error = PTR_ERR(sdp->sd_qc_inode); |
850 | fs_err(sdp, "can't find local \"qc\" file: %d\n", error); |
851 | goto fail_ut_i; |
852 | } |
853 | |
854 | iput(pn); |
855 | pn = NULL; |
856 | |
857 | ip = GFS2_I(sdp->sd_sc_inode); |
858 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, |
859 | &sdp->sd_sc_gh); |
860 | if (error) { |
861 | fs_err(sdp, "can't lock local \"sc\" file: %d\n", error); |
862 | goto fail_qc_i; |
863 | } |
864 | |
865 | ip = GFS2_I(sdp->sd_qc_inode); |
866 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, |
867 | &sdp->sd_qc_gh); |
868 | if (error) { |
869 | fs_err(sdp, "can't lock local \"qc\" file: %d\n", error); |
870 | goto fail_ut_gh; |
871 | } |
872 | |
873 | return 0; |
874 | |
875 | fail_qc_gh: |
876 | gfs2_glock_dq_uninit(&sdp->sd_qc_gh); |
877 | fail_ut_gh: |
878 | gfs2_glock_dq_uninit(&sdp->sd_sc_gh); |
879 | fail_qc_i: |
880 | iput(sdp->sd_qc_inode); |
881 | fail_ut_i: |
882 | iput(sdp->sd_sc_inode); |
883 | fail: |
884 | if (pn) |
885 | iput(pn); |
886 | return error; |
887 | } |
888 | |
889 | static int init_threads(struct gfs2_sbd *sdp, int undo) |
890 | { |
891 | struct task_struct *p; |
892 | int error = 0; |
893 | |
894 | if (undo) |
895 | goto fail_quotad; |
896 | |
897 | p = kthread_run(gfs2_logd, sdp, "gfs2_logd"); |
898 | error = IS_ERR(p); |
899 | if (error) { |
900 | fs_err(sdp, "can't start logd thread: %d\n", error); |
901 | return error; |
902 | } |
903 | sdp->sd_logd_process = p; |
904 | |
905 | p = kthread_run(gfs2_quotad, sdp, "gfs2_quotad"); |
906 | error = IS_ERR(p); |
907 | if (error) { |
908 | fs_err(sdp, "can't start quotad thread: %d\n", error); |
909 | goto fail; |
910 | } |
911 | sdp->sd_quotad_process = p; |
912 | |
913 | return 0; |
914 | |
915 | |
916 | fail_quotad: |
917 | kthread_stop(sdp->sd_quotad_process); |
918 | fail: |
919 | kthread_stop(sdp->sd_logd_process); |
920 | return error; |
921 | } |
922 | |
923 | static const match_table_t nolock_tokens = { |
924 | { Opt_jid, "jid=%d\n", }, |
925 | { Opt_err, NULL }, |
926 | }; |
927 | |
928 | static const struct lm_lockops nolock_ops = { |
929 | .lm_proto_name = "lock_nolock", |
930 | .lm_put_lock = gfs2_glock_free, |
931 | .lm_tokens = &nolock_tokens, |
932 | }; |
933 | |
934 | /** |
935 | * gfs2_lm_mount - mount a locking protocol |
936 | * @sdp: the filesystem |
937 | * @args: mount arguments |
938 | * @silent: if 1, don't complain if the FS isn't a GFS2 fs |
939 | * |
940 | * Returns: errno |
941 | */ |
942 | |
943 | static int gfs2_lm_mount(struct gfs2_sbd *sdp, int silent) |
944 | { |
945 | const struct lm_lockops *lm; |
946 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; |
947 | struct gfs2_args *args = &sdp->sd_args; |
948 | const char *proto = sdp->sd_proto_name; |
949 | const char *table = sdp->sd_table_name; |
950 | const char *fsname; |
951 | char *o, *options; |
952 | int ret; |
953 | |
954 | if (!strcmp("lock_nolock", proto)) { |
955 | lm = &nolock_ops; |
956 | sdp->sd_args.ar_localflocks = 1; |
957 | #ifdef CONFIG_GFS2_FS_LOCKING_DLM |
958 | } else if (!strcmp("lock_dlm", proto)) { |
959 | lm = &gfs2_dlm_ops; |
960 | #endif |
961 | } else { |
962 | printk(KERN_INFO "GFS2: can't find protocol %s\n", proto); |
963 | return -ENOENT; |
964 | } |
965 | |
966 | fs_info(sdp, "Trying to join cluster \"%s\", \"%s\"\n", proto, table); |
967 | |
968 | ls->ls_ops = lm; |
969 | ls->ls_first = 1; |
970 | |
971 | for (options = args->ar_hostdata; (o = strsep(&options, ":")); ) { |
972 | substring_t tmp[MAX_OPT_ARGS]; |
973 | int token, option; |
974 | |
975 | if (!o || !*o) |
976 | continue; |
977 | |
978 | token = match_token(o, *lm->lm_tokens, tmp); |
979 | switch (token) { |
980 | case Opt_jid: |
981 | ret = match_int(&tmp[0], &option); |
982 | if (ret || option < 0) |
983 | goto hostdata_error; |
984 | if (test_and_clear_bit(SDF_NOJOURNALID, &sdp->sd_flags)) |
985 | ls->ls_jid = option; |
986 | break; |
987 | case Opt_id: |
988 | /* Obsolete, but left for backward compat purposes */ |
989 | break; |
990 | case Opt_first: |
991 | ret = match_int(&tmp[0], &option); |
992 | if (ret || (option != 0 && option != 1)) |
993 | goto hostdata_error; |
994 | ls->ls_first = option; |
995 | break; |
996 | case Opt_nodir: |
997 | ret = match_int(&tmp[0], &option); |
998 | if (ret || (option != 0 && option != 1)) |
999 | goto hostdata_error; |
1000 | ls->ls_nodir = option; |
1001 | break; |
1002 | case Opt_err: |
1003 | default: |
1004 | hostdata_error: |
1005 | fs_info(sdp, "unknown hostdata (%s)\n", o); |
1006 | return -EINVAL; |
1007 | } |
1008 | } |
1009 | |
1010 | if (sdp->sd_args.ar_spectator) |
1011 | snprintf(sdp->sd_fsname, GFS2_FSNAME_LEN, "%s.s", table); |
1012 | else |
1013 | snprintf(sdp->sd_fsname, GFS2_FSNAME_LEN, "%s.%u", table, |
1014 | sdp->sd_lockstruct.ls_jid); |
1015 | |
1016 | fsname = strchr(table, ':'); |
1017 | if (fsname) |
1018 | fsname++; |
1019 | if (lm->lm_mount == NULL) { |
1020 | fs_info(sdp, "Now mounting FS...\n"); |
1021 | complete(&sdp->sd_locking_init); |
1022 | return 0; |
1023 | } |
1024 | ret = lm->lm_mount(sdp, fsname); |
1025 | if (ret == 0) |
1026 | fs_info(sdp, "Joined cluster. Now mounting FS...\n"); |
1027 | complete(&sdp->sd_locking_init); |
1028 | return ret; |
1029 | } |
1030 | |
1031 | void gfs2_lm_unmount(struct gfs2_sbd *sdp) |
1032 | { |
1033 | const struct lm_lockops *lm = sdp->sd_lockstruct.ls_ops; |
1034 | if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) && |
1035 | lm->lm_unmount) |
1036 | lm->lm_unmount(sdp); |
1037 | } |
1038 | |
1039 | static int gfs2_journalid_wait(void *word) |
1040 | { |
1041 | if (signal_pending(current)) |
1042 | return -EINTR; |
1043 | schedule(); |
1044 | return 0; |
1045 | } |
1046 | |
1047 | static int wait_on_journal(struct gfs2_sbd *sdp) |
1048 | { |
1049 | if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL) |
1050 | return 0; |
1051 | |
1052 | return wait_on_bit(&sdp->sd_flags, SDF_NOJOURNALID, gfs2_journalid_wait, TASK_INTERRUPTIBLE); |
1053 | } |
1054 | |
1055 | void gfs2_online_uevent(struct gfs2_sbd *sdp) |
1056 | { |
1057 | struct super_block *sb = sdp->sd_vfs; |
1058 | char ro[20]; |
1059 | char spectator[20]; |
1060 | char *envp[] = { ro, spectator, NULL }; |
1061 | sprintf(ro, "RDONLY=%d", (sb->s_flags & MS_RDONLY) ? 1 : 0); |
1062 | sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0); |
1063 | kobject_uevent_env(&sdp->sd_kobj, KOBJ_ONLINE, envp); |
1064 | } |
1065 | |
1066 | /** |
1067 | * fill_super - Read in superblock |
1068 | * @sb: The VFS superblock |
1069 | * @data: Mount options |
1070 | * @silent: Don't complain if it's not a GFS2 filesystem |
1071 | * |
1072 | * Returns: errno |
1073 | */ |
1074 | |
1075 | static int fill_super(struct super_block *sb, struct gfs2_args *args, int silent) |
1076 | { |
1077 | struct gfs2_sbd *sdp; |
1078 | struct gfs2_holder mount_gh; |
1079 | int error; |
1080 | |
1081 | sdp = init_sbd(sb); |
1082 | if (!sdp) { |
1083 | printk(KERN_WARNING "GFS2: can't alloc struct gfs2_sbd\n"); |
1084 | return -ENOMEM; |
1085 | } |
1086 | sdp->sd_args = *args; |
1087 | |
1088 | if (sdp->sd_args.ar_spectator) { |
1089 | sb->s_flags |= MS_RDONLY; |
1090 | set_bit(SDF_NORECOVERY, &sdp->sd_flags); |
1091 | } |
1092 | if (sdp->sd_args.ar_posix_acl) |
1093 | sb->s_flags |= MS_POSIXACL; |
1094 | if (sdp->sd_args.ar_nobarrier) |
1095 | set_bit(SDF_NOBARRIERS, &sdp->sd_flags); |
1096 | |
1097 | sb->s_magic = GFS2_MAGIC; |
1098 | sb->s_op = &gfs2_super_ops; |
1099 | sb->s_d_op = &gfs2_dops; |
1100 | sb->s_export_op = &gfs2_export_ops; |
1101 | sb->s_xattr = gfs2_xattr_handlers; |
1102 | sb->s_qcop = &gfs2_quotactl_ops; |
1103 | sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; |
1104 | sb->s_time_gran = 1; |
1105 | sb->s_maxbytes = MAX_LFS_FILESIZE; |
1106 | |
1107 | /* Set up the buffer cache and fill in some fake block size values |
1108 | to allow us to read-in the on-disk superblock. */ |
1109 | sdp->sd_sb.sb_bsize = sb_min_blocksize(sb, GFS2_BASIC_BLOCK); |
1110 | sdp->sd_sb.sb_bsize_shift = sb->s_blocksize_bits; |
1111 | sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift - |
1112 | GFS2_BASIC_BLOCK_SHIFT; |
1113 | sdp->sd_fsb2bb = 1 << sdp->sd_fsb2bb_shift; |
1114 | |
1115 | sdp->sd_tune.gt_logd_secs = sdp->sd_args.ar_commit; |
1116 | sdp->sd_tune.gt_quota_quantum = sdp->sd_args.ar_quota_quantum; |
1117 | if (sdp->sd_args.ar_statfs_quantum) { |
1118 | sdp->sd_tune.gt_statfs_slow = 0; |
1119 | sdp->sd_tune.gt_statfs_quantum = sdp->sd_args.ar_statfs_quantum; |
1120 | } else { |
1121 | sdp->sd_tune.gt_statfs_slow = 1; |
1122 | sdp->sd_tune.gt_statfs_quantum = 30; |
1123 | } |
1124 | |
1125 | error = init_names(sdp, silent); |
1126 | if (error) |
1127 | goto fail; |
1128 | |
1129 | gfs2_create_debugfs_file(sdp); |
1130 | |
1131 | error = gfs2_sys_fs_add(sdp); |
1132 | if (error) |
1133 | goto fail; |
1134 | |
1135 | error = gfs2_lm_mount(sdp, silent); |
1136 | if (error) |
1137 | goto fail_sys; |
1138 | |
1139 | error = init_locking(sdp, &mount_gh, DO); |
1140 | if (error) |
1141 | goto fail_lm; |
1142 | |
1143 | error = init_sb(sdp, silent); |
1144 | if (error) |
1145 | goto fail_locking; |
1146 | |
1147 | error = wait_on_journal(sdp); |
1148 | if (error) |
1149 | goto fail_sb; |
1150 | |
1151 | /* |
1152 | * If user space has failed to join the cluster or some similar |
1153 | * failure has occurred, then the journal id will contain a |
1154 | * negative (error) number. This will then be returned to the |
1155 | * caller (of the mount syscall). We do this even for spectator |
1156 | * mounts (which just write a jid of 0 to indicate "ok" even though |
1157 | * the jid is unused in the spectator case) |
1158 | */ |
1159 | if (sdp->sd_lockstruct.ls_jid < 0) { |
1160 | error = sdp->sd_lockstruct.ls_jid; |
1161 | sdp->sd_lockstruct.ls_jid = 0; |
1162 | goto fail_sb; |
1163 | } |
1164 | |
1165 | error = init_inodes(sdp, DO); |
1166 | if (error) |
1167 | goto fail_sb; |
1168 | |
1169 | error = init_per_node(sdp, DO); |
1170 | if (error) |
1171 | goto fail_inodes; |
1172 | |
1173 | error = gfs2_statfs_init(sdp); |
1174 | if (error) { |
1175 | fs_err(sdp, "can't initialize statfs subsystem: %d\n", error); |
1176 | goto fail_per_node; |
1177 | } |
1178 | |
1179 | error = init_threads(sdp, DO); |
1180 | if (error) |
1181 | goto fail_per_node; |
1182 | |
1183 | if (!(sb->s_flags & MS_RDONLY)) { |
1184 | error = gfs2_make_fs_rw(sdp); |
1185 | if (error) { |
1186 | fs_err(sdp, "can't make FS RW: %d\n", error); |
1187 | goto fail_threads; |
1188 | } |
1189 | } |
1190 | |
1191 | gfs2_glock_dq_uninit(&mount_gh); |
1192 | gfs2_online_uevent(sdp); |
1193 | return 0; |
1194 | |
1195 | fail_threads: |
1196 | init_threads(sdp, UNDO); |
1197 | fail_per_node: |
1198 | init_per_node(sdp, UNDO); |
1199 | fail_inodes: |
1200 | init_inodes(sdp, UNDO); |
1201 | fail_sb: |
1202 | if (sdp->sd_root_dir) |
1203 | dput(sdp->sd_root_dir); |
1204 | if (sdp->sd_master_dir) |
1205 | dput(sdp->sd_master_dir); |
1206 | if (sb->s_root) |
1207 | dput(sb->s_root); |
1208 | sb->s_root = NULL; |
1209 | fail_locking: |
1210 | init_locking(sdp, &mount_gh, UNDO); |
1211 | fail_lm: |
1212 | gfs2_gl_hash_clear(sdp); |
1213 | gfs2_lm_unmount(sdp); |
1214 | fail_sys: |
1215 | gfs2_sys_fs_del(sdp); |
1216 | fail: |
1217 | gfs2_delete_debugfs_file(sdp); |
1218 | kfree(sdp); |
1219 | sb->s_fs_info = NULL; |
1220 | return error; |
1221 | } |
1222 | |
1223 | static int set_gfs2_super(struct super_block *s, void *data) |
1224 | { |
1225 | s->s_bdev = data; |
1226 | s->s_dev = s->s_bdev->bd_dev; |
1227 | |
1228 | /* |
1229 | * We set the bdi here to the queue backing, file systems can |
1230 | * overwrite this in ->fill_super() |
1231 | */ |
1232 | s->s_bdi = &bdev_get_queue(s->s_bdev)->backing_dev_info; |
1233 | return 0; |
1234 | } |
1235 | |
1236 | static int test_gfs2_super(struct super_block *s, void *ptr) |
1237 | { |
1238 | struct block_device *bdev = ptr; |
1239 | return (bdev == s->s_bdev); |
1240 | } |
1241 | |
1242 | /** |
1243 | * gfs2_mount - Get the GFS2 superblock |
1244 | * @fs_type: The GFS2 filesystem type |
1245 | * @flags: Mount flags |
1246 | * @dev_name: The name of the device |
1247 | * @data: The mount arguments |
1248 | * |
1249 | * Q. Why not use get_sb_bdev() ? |
1250 | * A. We need to select one of two root directories to mount, independent |
1251 | * of whether this is the initial, or subsequent, mount of this sb |
1252 | * |
1253 | * Returns: 0 or -ve on error |
1254 | */ |
1255 | |
1256 | static struct dentry *gfs2_mount(struct file_system_type *fs_type, int flags, |
1257 | const char *dev_name, void *data) |
1258 | { |
1259 | struct block_device *bdev; |
1260 | struct super_block *s; |
1261 | fmode_t mode = FMODE_READ | FMODE_EXCL; |
1262 | int error; |
1263 | struct gfs2_args args; |
1264 | struct gfs2_sbd *sdp; |
1265 | |
1266 | if (!(flags & MS_RDONLY)) |
1267 | mode |= FMODE_WRITE; |
1268 | |
1269 | bdev = blkdev_get_by_path(dev_name, mode, fs_type); |
1270 | if (IS_ERR(bdev)) |
1271 | return ERR_CAST(bdev); |
1272 | |
1273 | /* |
1274 | * once the super is inserted into the list by sget, s_umount |
1275 | * will protect the lockfs code from trying to start a snapshot |
1276 | * while we are mounting |
1277 | */ |
1278 | mutex_lock(&bdev->bd_fsfreeze_mutex); |
1279 | if (bdev->bd_fsfreeze_count > 0) { |
1280 | mutex_unlock(&bdev->bd_fsfreeze_mutex); |
1281 | error = -EBUSY; |
1282 | goto error_bdev; |
1283 | } |
1284 | s = sget(fs_type, test_gfs2_super, set_gfs2_super, bdev); |
1285 | mutex_unlock(&bdev->bd_fsfreeze_mutex); |
1286 | error = PTR_ERR(s); |
1287 | if (IS_ERR(s)) |
1288 | goto error_bdev; |
1289 | |
1290 | if (s->s_root) |
1291 | blkdev_put(bdev, mode); |
1292 | |
1293 | memset(&args, 0, sizeof(args)); |
1294 | args.ar_quota = GFS2_QUOTA_DEFAULT; |
1295 | args.ar_data = GFS2_DATA_DEFAULT; |
1296 | args.ar_commit = 30; |
1297 | args.ar_statfs_quantum = 30; |
1298 | args.ar_quota_quantum = 60; |
1299 | args.ar_errors = GFS2_ERRORS_DEFAULT; |
1300 | |
1301 | error = gfs2_mount_args(&args, data); |
1302 | if (error) { |
1303 | printk(KERN_WARNING "GFS2: can't parse mount arguments\n"); |
1304 | goto error_super; |
1305 | } |
1306 | |
1307 | if (s->s_root) { |
1308 | error = -EBUSY; |
1309 | if ((flags ^ s->s_flags) & MS_RDONLY) |
1310 | goto error_super; |
1311 | } else { |
1312 | char b[BDEVNAME_SIZE]; |
1313 | |
1314 | s->s_flags = flags; |
1315 | s->s_mode = mode; |
1316 | strlcpy(s->s_id, bdevname(bdev, b), sizeof(s->s_id)); |
1317 | sb_set_blocksize(s, block_size(bdev)); |
1318 | error = fill_super(s, &args, flags & MS_SILENT ? 1 : 0); |
1319 | if (error) |
1320 | goto error_super; |
1321 | s->s_flags |= MS_ACTIVE; |
1322 | bdev->bd_super = s; |
1323 | } |
1324 | |
1325 | sdp = s->s_fs_info; |
1326 | if (args.ar_meta) |
1327 | return dget(sdp->sd_master_dir); |
1328 | else |
1329 | return dget(sdp->sd_root_dir); |
1330 | |
1331 | error_super: |
1332 | deactivate_locked_super(s); |
1333 | return ERR_PTR(error); |
1334 | error_bdev: |
1335 | blkdev_put(bdev, mode); |
1336 | return ERR_PTR(error); |
1337 | } |
1338 | |
1339 | static int set_meta_super(struct super_block *s, void *ptr) |
1340 | { |
1341 | return -EINVAL; |
1342 | } |
1343 | |
1344 | static struct dentry *gfs2_mount_meta(struct file_system_type *fs_type, |
1345 | int flags, const char *dev_name, void *data) |
1346 | { |
1347 | struct super_block *s; |
1348 | struct gfs2_sbd *sdp; |
1349 | struct path path; |
1350 | int error; |
1351 | |
1352 | error = kern_path(dev_name, LOOKUP_FOLLOW, &path); |
1353 | if (error) { |
1354 | printk(KERN_WARNING "GFS2: path_lookup on %s returned error %d\n", |
1355 | dev_name, error); |
1356 | return ERR_PTR(error); |
1357 | } |
1358 | s = sget(&gfs2_fs_type, test_gfs2_super, set_meta_super, |
1359 | path.dentry->d_inode->i_sb->s_bdev); |
1360 | path_put(&path); |
1361 | if (IS_ERR(s)) { |
1362 | printk(KERN_WARNING "GFS2: gfs2 mount does not exist\n"); |
1363 | return ERR_CAST(s); |
1364 | } |
1365 | if ((flags ^ s->s_flags) & MS_RDONLY) { |
1366 | deactivate_locked_super(s); |
1367 | return ERR_PTR(-EBUSY); |
1368 | } |
1369 | sdp = s->s_fs_info; |
1370 | return dget(sdp->sd_master_dir); |
1371 | } |
1372 | |
1373 | static void gfs2_kill_sb(struct super_block *sb) |
1374 | { |
1375 | struct gfs2_sbd *sdp = sb->s_fs_info; |
1376 | |
1377 | if (sdp == NULL) { |
1378 | kill_block_super(sb); |
1379 | return; |
1380 | } |
1381 | |
1382 | gfs2_meta_syncfs(sdp); |
1383 | dput(sdp->sd_root_dir); |
1384 | dput(sdp->sd_master_dir); |
1385 | sdp->sd_root_dir = NULL; |
1386 | sdp->sd_master_dir = NULL; |
1387 | shrink_dcache_sb(sb); |
1388 | kill_block_super(sb); |
1389 | gfs2_delete_debugfs_file(sdp); |
1390 | kfree(sdp); |
1391 | } |
1392 | |
1393 | struct file_system_type gfs2_fs_type = { |
1394 | .name = "gfs2", |
1395 | .fs_flags = FS_REQUIRES_DEV, |
1396 | .mount = gfs2_mount, |
1397 | .kill_sb = gfs2_kill_sb, |
1398 | .owner = THIS_MODULE, |
1399 | }; |
1400 | |
1401 | struct file_system_type gfs2meta_fs_type = { |
1402 | .name = "gfs2meta", |
1403 | .fs_flags = FS_REQUIRES_DEV, |
1404 | .mount = gfs2_mount_meta, |
1405 | .owner = THIS_MODULE, |
1406 | }; |
1407 | |
1408 |
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v2.6.34-rc5
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