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Commit | Line | Data |
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b3b94faa DT |
1 | /* |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
cf45b752 | 3 | * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved. |
b3b94faa DT |
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 | |
e9fc2aa0 | 7 | * of the GNU General Public License version 2. |
b3b94faa DT |
8 | */ |
9 | ||
d77d1b58 JP |
10 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
11 | ||
b3b94faa DT |
12 | #include <linux/sched.h> |
13 | #include <linux/slab.h> | |
14 | #include <linux/spinlock.h> | |
15 | #include <linux/completion.h> | |
16 | #include <linux/buffer_head.h> | |
b3b94faa DT |
17 | #include <linux/blkdev.h> |
18 | #include <linux/kthread.h> | |
afeacc8c | 19 | #include <linux/export.h> |
86384605 AD |
20 | #include <linux/namei.h> |
21 | #include <linux/mount.h> | |
5c676f6d | 22 | #include <linux/gfs2_ondisk.h> |
cc632e7f | 23 | #include <linux/quotaops.h> |
56aa72d0 | 24 | #include <linux/lockdep.h> |
7f78e035 | 25 | #include <linux/module.h> |
95fe66de | 26 | #include <linux/backing-dev.h> |
b3b94faa DT |
27 | |
28 | #include "gfs2.h" | |
5c676f6d | 29 | #include "incore.h" |
da6dd40d | 30 | #include "bmap.h" |
b3b94faa DT |
31 | #include "glock.h" |
32 | #include "glops.h" | |
33 | #include "inode.h" | |
b3b94faa DT |
34 | #include "recovery.h" |
35 | #include "rgrp.h" | |
36 | #include "super.h" | |
b3b94faa | 37 | #include "sys.h" |
5c676f6d | 38 | #include "util.h" |
bb3b0e3d | 39 | #include "log.h" |
9ac1b4d9 | 40 | #include "quota.h" |
b5289681 | 41 | #include "dir.h" |
70d4ee94 | 42 | #include "meta_io.h" |
63997775 | 43 | #include "trace_gfs2.h" |
b3b94faa DT |
44 | |
45 | #define DO 0 | |
46 | #define UNDO 1 | |
47 | ||
9b8df98f SW |
48 | /** |
49 | * gfs2_tune_init - Fill a gfs2_tune structure with default values | |
50 | * @gt: tune | |
51 | * | |
52 | */ | |
53 | ||
54 | static void gfs2_tune_init(struct gfs2_tune *gt) | |
55 | { | |
56 | spin_lock_init(>->gt_spin); | |
57 | ||
9b8df98f SW |
58 | gt->gt_quota_warn_period = 10; |
59 | gt->gt_quota_scale_num = 1; | |
60 | gt->gt_quota_scale_den = 1; | |
9b8df98f | 61 | gt->gt_new_files_jdata = 0; |
47a9a527 | 62 | gt->gt_max_readahead = BIT(18); |
9b8df98f | 63 | gt->gt_complain_secs = 10; |
9b8df98f SW |
64 | } |
65 | ||
b3b94faa DT |
66 | static struct gfs2_sbd *init_sbd(struct super_block *sb) |
67 | { | |
68 | struct gfs2_sbd *sdp; | |
70d4ee94 | 69 | struct address_space *mapping; |
b3b94faa | 70 | |
85d1da67 | 71 | sdp = kzalloc(sizeof(struct gfs2_sbd), GFP_KERNEL); |
b3b94faa DT |
72 | if (!sdp) |
73 | return NULL; | |
74 | ||
5c676f6d | 75 | sb->s_fs_info = sdp; |
b3b94faa | 76 | sdp->sd_vfs = sb; |
a245769f SW |
77 | sdp->sd_lkstats = alloc_percpu(struct gfs2_pcpu_lkstats); |
78 | if (!sdp->sd_lkstats) { | |
79 | kfree(sdp); | |
80 | return NULL; | |
81 | } | |
82 | ||
ba6e9364 | 83 | set_bit(SDF_NOJOURNALID, &sdp->sd_flags); |
b3b94faa DT |
84 | gfs2_tune_init(&sdp->sd_tune); |
85 | ||
e402746a SW |
86 | init_waitqueue_head(&sdp->sd_glock_wait); |
87 | atomic_set(&sdp->sd_glock_disposal, 0); | |
3942ae53 | 88 | init_completion(&sdp->sd_locking_init); |
fd95e81c | 89 | init_completion(&sdp->sd_wdack); |
b3b94faa | 90 | spin_lock_init(&sdp->sd_statfs_spin); |
b3b94faa DT |
91 | |
92 | spin_lock_init(&sdp->sd_rindex_spin); | |
7c9ca621 | 93 | sdp->sd_rindex_tree.rb_node = NULL; |
b3b94faa DT |
94 | |
95 | INIT_LIST_HEAD(&sdp->sd_jindex_list); | |
96 | spin_lock_init(&sdp->sd_jindex_spin); | |
f55ab26a | 97 | mutex_init(&sdp->sd_jindex_mutex); |
0e48e055 | 98 | init_completion(&sdp->sd_journal_ready); |
b3b94faa | 99 | |
b3b94faa | 100 | INIT_LIST_HEAD(&sdp->sd_quota_list); |
f55ab26a | 101 | mutex_init(&sdp->sd_quota_mutex); |
e46c772d | 102 | mutex_init(&sdp->sd_quota_sync_mutex); |
37b2c837 | 103 | init_waitqueue_head(&sdp->sd_quota_wait); |
813e0c46 SW |
104 | INIT_LIST_HEAD(&sdp->sd_trunc_list); |
105 | spin_lock_init(&sdp->sd_trunc_lock); | |
2d9e7230 | 106 | spin_lock_init(&sdp->sd_bitmap_lock); |
b3b94faa | 107 | |
70d4ee94 SW |
108 | mapping = &sdp->sd_aspace; |
109 | ||
39849d69 | 110 | address_space_init_once(mapping); |
1b2ad412 | 111 | mapping->a_ops = &gfs2_rgrp_aops; |
70d4ee94 SW |
112 | mapping->host = sb->s_bdev->bd_inode; |
113 | mapping->flags = 0; | |
114 | mapping_set_gfp_mask(mapping, GFP_NOFS); | |
115 | mapping->private_data = NULL; | |
70d4ee94 SW |
116 | mapping->writeback_index = 0; |
117 | ||
b3b94faa | 118 | spin_lock_init(&sdp->sd_log_lock); |
5e687eac | 119 | atomic_set(&sdp->sd_log_pinned, 0); |
b3b94faa | 120 | INIT_LIST_HEAD(&sdp->sd_log_le_revoke); |
d7b616e2 | 121 | INIT_LIST_HEAD(&sdp->sd_log_le_ordered); |
45138990 | 122 | spin_lock_init(&sdp->sd_ordered_lock); |
b3b94faa | 123 | |
5e687eac BM |
124 | init_waitqueue_head(&sdp->sd_log_waitq); |
125 | init_waitqueue_head(&sdp->sd_logd_waitq); | |
d6a079e8 | 126 | spin_lock_init(&sdp->sd_ail_lock); |
b3b94faa DT |
127 | INIT_LIST_HEAD(&sdp->sd_ail1_list); |
128 | INIT_LIST_HEAD(&sdp->sd_ail2_list); | |
129 | ||
484adff8 | 130 | init_rwsem(&sdp->sd_log_flush_lock); |
16615be1 | 131 | atomic_set(&sdp->sd_log_in_flight, 0); |
2e60d768 BM |
132 | atomic_set(&sdp->sd_reserving_log, 0); |
133 | init_waitqueue_head(&sdp->sd_reserving_log_wait); | |
16615be1 | 134 | init_waitqueue_head(&sdp->sd_log_flush_wait); |
2e60d768 BM |
135 | atomic_set(&sdp->sd_freeze_state, SFS_UNFROZEN); |
136 | mutex_init(&sdp->sd_freeze_mutex); | |
b3b94faa | 137 | |
b3b94faa DT |
138 | return sdp; |
139 | } | |
140 | ||
b3b94faa | 141 | |
9b8df98f SW |
142 | /** |
143 | * gfs2_check_sb - Check superblock | |
144 | * @sdp: the filesystem | |
145 | * @sb: The superblock | |
146 | * @silent: Don't print a message if the check fails | |
147 | * | |
148 | * Checks the version code of the FS is one that we understand how to | |
149 | * read and that the sizes of the various on-disk structures have not | |
150 | * changed. | |
151 | */ | |
152 | ||
32e471ef | 153 | static int gfs2_check_sb(struct gfs2_sbd *sdp, int silent) |
9b8df98f | 154 | { |
32e471ef SW |
155 | struct gfs2_sb_host *sb = &sdp->sd_sb; |
156 | ||
9b8df98f SW |
157 | if (sb->sb_magic != GFS2_MAGIC || |
158 | sb->sb_type != GFS2_METATYPE_SB) { | |
159 | if (!silent) | |
d77d1b58 | 160 | pr_warn("not a GFS2 filesystem\n"); |
9b8df98f SW |
161 | return -EINVAL; |
162 | } | |
163 | ||
164 | /* If format numbers match exactly, we're done. */ | |
165 | ||
166 | if (sb->sb_fs_format == GFS2_FORMAT_FS && | |
167 | sb->sb_multihost_format == GFS2_FORMAT_MULTI) | |
168 | return 0; | |
169 | ||
c80dbb58 | 170 | fs_warn(sdp, "Unknown on-disk format, unable to mount\n"); |
9b8df98f | 171 | |
c80dbb58 | 172 | return -EINVAL; |
9b8df98f SW |
173 | } |
174 | ||
4246a0b6 | 175 | static void end_bio_io_page(struct bio *bio) |
9b8df98f SW |
176 | { |
177 | struct page *page = bio->bi_private; | |
178 | ||
4e4cbee9 | 179 | if (!bio->bi_status) |
9b8df98f SW |
180 | SetPageUptodate(page); |
181 | else | |
4e4cbee9 | 182 | pr_warn("error %d reading superblock\n", bio->bi_status); |
9b8df98f SW |
183 | unlock_page(page); |
184 | } | |
185 | ||
32e471ef | 186 | static void gfs2_sb_in(struct gfs2_sbd *sdp, const void *buf) |
9b8df98f | 187 | { |
32e471ef SW |
188 | struct gfs2_sb_host *sb = &sdp->sd_sb; |
189 | struct super_block *s = sdp->sd_vfs; | |
9b8df98f SW |
190 | const struct gfs2_sb *str = buf; |
191 | ||
192 | sb->sb_magic = be32_to_cpu(str->sb_header.mh_magic); | |
193 | sb->sb_type = be32_to_cpu(str->sb_header.mh_type); | |
194 | sb->sb_format = be32_to_cpu(str->sb_header.mh_format); | |
195 | sb->sb_fs_format = be32_to_cpu(str->sb_fs_format); | |
196 | sb->sb_multihost_format = be32_to_cpu(str->sb_multihost_format); | |
197 | sb->sb_bsize = be32_to_cpu(str->sb_bsize); | |
198 | sb->sb_bsize_shift = be32_to_cpu(str->sb_bsize_shift); | |
199 | sb->sb_master_dir.no_addr = be64_to_cpu(str->sb_master_dir.no_addr); | |
200 | sb->sb_master_dir.no_formal_ino = be64_to_cpu(str->sb_master_dir.no_formal_ino); | |
201 | sb->sb_root_dir.no_addr = be64_to_cpu(str->sb_root_dir.no_addr); | |
202 | sb->sb_root_dir.no_formal_ino = be64_to_cpu(str->sb_root_dir.no_formal_ino); | |
203 | ||
204 | memcpy(sb->sb_lockproto, str->sb_lockproto, GFS2_LOCKNAME_LEN); | |
205 | memcpy(sb->sb_locktable, str->sb_locktable, GFS2_LOCKNAME_LEN); | |
85787090 | 206 | memcpy(&s->s_uuid, str->sb_uuid, 16); |
9b8df98f SW |
207 | } |
208 | ||
209 | /** | |
210 | * gfs2_read_super - Read the gfs2 super block from disk | |
211 | * @sdp: The GFS2 super block | |
212 | * @sector: The location of the super block | |
213 | * @error: The error code to return | |
214 | * | |
215 | * This uses the bio functions to read the super block from disk | |
216 | * because we want to be 100% sure that we never read cached data. | |
217 | * A super block is read twice only during each GFS2 mount and is | |
218 | * never written to by the filesystem. The first time its read no | |
219 | * locks are held, and the only details which are looked at are those | |
220 | * relating to the locking protocol. Once locking is up and working, | |
221 | * the sb is read again under the lock to establish the location of | |
222 | * the master directory (contains pointers to journals etc) and the | |
223 | * root directory. | |
224 | * | |
225 | * Returns: 0 on success or error | |
226 | */ | |
227 | ||
32e471ef | 228 | static int gfs2_read_super(struct gfs2_sbd *sdp, sector_t sector, int silent) |
9b8df98f SW |
229 | { |
230 | struct super_block *sb = sdp->sd_vfs; | |
231 | struct gfs2_sb *p; | |
232 | struct page *page; | |
233 | struct bio *bio; | |
234 | ||
235 | page = alloc_page(GFP_NOFS); | |
236 | if (unlikely(!page)) | |
ac3beb6a | 237 | return -ENOMEM; |
9b8df98f SW |
238 | |
239 | ClearPageUptodate(page); | |
240 | ClearPageDirty(page); | |
241 | lock_page(page); | |
242 | ||
243 | bio = bio_alloc(GFP_NOFS, 1); | |
4f024f37 | 244 | bio->bi_iter.bi_sector = sector * (sb->s_blocksize >> 9); |
9b8df98f SW |
245 | bio->bi_bdev = sb->s_bdev; |
246 | bio_add_page(bio, page, PAGE_SIZE, 0); | |
247 | ||
248 | bio->bi_end_io = end_bio_io_page; | |
249 | bio->bi_private = page; | |
70fd7614 | 250 | bio_set_op_attrs(bio, REQ_OP_READ, REQ_META); |
4e49ea4a | 251 | submit_bio(bio); |
9b8df98f SW |
252 | wait_on_page_locked(page); |
253 | bio_put(bio); | |
254 | if (!PageUptodate(page)) { | |
255 | __free_page(page); | |
256 | return -EIO; | |
257 | } | |
258 | p = kmap(page); | |
32e471ef | 259 | gfs2_sb_in(sdp, p); |
9b8df98f SW |
260 | kunmap(page); |
261 | __free_page(page); | |
32e471ef | 262 | return gfs2_check_sb(sdp, silent); |
9b8df98f | 263 | } |
6bac243f | 264 | |
9b8df98f SW |
265 | /** |
266 | * gfs2_read_sb - Read super block | |
267 | * @sdp: The GFS2 superblock | |
9b8df98f SW |
268 | * @silent: Don't print message if mount fails |
269 | * | |
270 | */ | |
271 | ||
6bac243f | 272 | static int gfs2_read_sb(struct gfs2_sbd *sdp, int silent) |
9b8df98f SW |
273 | { |
274 | u32 hash_blocks, ind_blocks, leaf_blocks; | |
275 | u32 tmp_blocks; | |
276 | unsigned int x; | |
277 | int error; | |
278 | ||
32e471ef | 279 | error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift, silent); |
9b8df98f SW |
280 | if (error) { |
281 | if (!silent) | |
282 | fs_err(sdp, "can't read superblock\n"); | |
283 | return error; | |
284 | } | |
285 | ||
9b8df98f SW |
286 | sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift - |
287 | GFS2_BASIC_BLOCK_SHIFT; | |
47a9a527 | 288 | sdp->sd_fsb2bb = BIT(sdp->sd_fsb2bb_shift); |
9b8df98f SW |
289 | sdp->sd_diptrs = (sdp->sd_sb.sb_bsize - |
290 | sizeof(struct gfs2_dinode)) / sizeof(u64); | |
291 | sdp->sd_inptrs = (sdp->sd_sb.sb_bsize - | |
292 | sizeof(struct gfs2_meta_header)) / sizeof(u64); | |
293 | sdp->sd_jbsize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_meta_header); | |
294 | sdp->sd_hash_bsize = sdp->sd_sb.sb_bsize / 2; | |
295 | sdp->sd_hash_bsize_shift = sdp->sd_sb.sb_bsize_shift - 1; | |
296 | sdp->sd_hash_ptrs = sdp->sd_hash_bsize / sizeof(u64); | |
297 | sdp->sd_qc_per_block = (sdp->sd_sb.sb_bsize - | |
298 | sizeof(struct gfs2_meta_header)) / | |
299 | sizeof(struct gfs2_quota_change); | |
a68a0a35 BP |
300 | sdp->sd_blocks_per_bitmap = (sdp->sd_sb.sb_bsize - |
301 | sizeof(struct gfs2_meta_header)) | |
302 | * GFS2_NBBY; /* not the rgrp bitmap, subsequent bitmaps only */ | |
9b8df98f SW |
303 | |
304 | /* Compute maximum reservation required to add a entry to a directory */ | |
305 | ||
47a9a527 | 306 | hash_blocks = DIV_ROUND_UP(sizeof(u64) * BIT(GFS2_DIR_MAX_DEPTH), |
9b8df98f SW |
307 | sdp->sd_jbsize); |
308 | ||
309 | ind_blocks = 0; | |
310 | for (tmp_blocks = hash_blocks; tmp_blocks > sdp->sd_diptrs;) { | |
311 | tmp_blocks = DIV_ROUND_UP(tmp_blocks, sdp->sd_inptrs); | |
312 | ind_blocks += tmp_blocks; | |
313 | } | |
314 | ||
315 | leaf_blocks = 2 + GFS2_DIR_MAX_DEPTH; | |
316 | ||
317 | sdp->sd_max_dirres = hash_blocks + ind_blocks + leaf_blocks; | |
318 | ||
319 | sdp->sd_heightsize[0] = sdp->sd_sb.sb_bsize - | |
320 | sizeof(struct gfs2_dinode); | |
321 | sdp->sd_heightsize[1] = sdp->sd_sb.sb_bsize * sdp->sd_diptrs; | |
322 | for (x = 2;; x++) { | |
323 | u64 space, d; | |
324 | u32 m; | |
325 | ||
326 | space = sdp->sd_heightsize[x - 1] * sdp->sd_inptrs; | |
327 | d = space; | |
328 | m = do_div(d, sdp->sd_inptrs); | |
329 | ||
330 | if (d != sdp->sd_heightsize[x - 1] || m) | |
331 | break; | |
332 | sdp->sd_heightsize[x] = space; | |
333 | } | |
334 | sdp->sd_max_height = x; | |
335 | sdp->sd_heightsize[x] = ~0; | |
336 | gfs2_assert(sdp, sdp->sd_max_height <= GFS2_MAX_META_HEIGHT); | |
337 | ||
338 | sdp->sd_jheightsize[0] = sdp->sd_sb.sb_bsize - | |
339 | sizeof(struct gfs2_dinode); | |
340 | sdp->sd_jheightsize[1] = sdp->sd_jbsize * sdp->sd_diptrs; | |
341 | for (x = 2;; x++) { | |
342 | u64 space, d; | |
343 | u32 m; | |
344 | ||
345 | space = sdp->sd_jheightsize[x - 1] * sdp->sd_inptrs; | |
346 | d = space; | |
347 | m = do_div(d, sdp->sd_inptrs); | |
348 | ||
349 | if (d != sdp->sd_jheightsize[x - 1] || m) | |
350 | break; | |
351 | sdp->sd_jheightsize[x] = space; | |
352 | } | |
353 | sdp->sd_max_jheight = x; | |
354 | sdp->sd_jheightsize[x] = ~0; | |
355 | gfs2_assert(sdp, sdp->sd_max_jheight <= GFS2_MAX_META_HEIGHT); | |
356 | ||
471f3db2 BM |
357 | sdp->sd_max_dents_per_leaf = (sdp->sd_sb.sb_bsize - |
358 | sizeof(struct gfs2_leaf)) / | |
359 | GFS2_MIN_DIRENT_SIZE; | |
9b8df98f SW |
360 | return 0; |
361 | } | |
362 | ||
b3b94faa DT |
363 | static int init_names(struct gfs2_sbd *sdp, int silent) |
364 | { | |
b3b94faa DT |
365 | char *proto, *table; |
366 | int error = 0; | |
367 | ||
368 | proto = sdp->sd_args.ar_lockproto; | |
369 | table = sdp->sd_args.ar_locktable; | |
370 | ||
371 | /* Try to autodetect */ | |
372 | ||
373 | if (!proto[0] || !table[0]) { | |
32e471ef | 374 | error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift, silent); |
bb8d8a6f SW |
375 | if (error) |
376 | return error; | |
3cf1e7be | 377 | |
b3b94faa | 378 | if (!proto[0]) |
3cf1e7be | 379 | proto = sdp->sd_sb.sb_lockproto; |
b3b94faa | 380 | if (!table[0]) |
3cf1e7be | 381 | table = sdp->sd_sb.sb_locktable; |
b3b94faa DT |
382 | } |
383 | ||
384 | if (!table[0]) | |
385 | table = sdp->sd_vfs->s_id; | |
386 | ||
00377d8e JD |
387 | strlcpy(sdp->sd_proto_name, proto, GFS2_FSNAME_LEN); |
388 | strlcpy(sdp->sd_table_name, table, GFS2_FSNAME_LEN); | |
b3b94faa | 389 | |
5d35e31f DC |
390 | table = sdp->sd_table_name; |
391 | while ((table = strchr(table, '/'))) | |
b35997d4 RP |
392 | *table = '_'; |
393 | ||
b3b94faa DT |
394 | return error; |
395 | } | |
396 | ||
397 | static int init_locking(struct gfs2_sbd *sdp, struct gfs2_holder *mount_gh, | |
398 | int undo) | |
399 | { | |
b3b94faa DT |
400 | int error = 0; |
401 | ||
402 | if (undo) | |
403 | goto fail_trans; | |
404 | ||
b3b94faa DT |
405 | error = gfs2_glock_nq_num(sdp, |
406 | GFS2_MOUNT_LOCK, &gfs2_nondisk_glops, | |
407 | LM_ST_EXCLUSIVE, LM_FLAG_NOEXP | GL_NOCACHE, | |
408 | mount_gh); | |
409 | if (error) { | |
410 | fs_err(sdp, "can't acquire mount glock: %d\n", error); | |
411 | goto fail; | |
412 | } | |
413 | ||
414 | error = gfs2_glock_nq_num(sdp, | |
415 | GFS2_LIVE_LOCK, &gfs2_nondisk_glops, | |
416 | LM_ST_SHARED, | |
579b78a4 | 417 | LM_FLAG_NOEXP | GL_EXACT, |
b3b94faa DT |
418 | &sdp->sd_live_gh); |
419 | if (error) { | |
420 | fs_err(sdp, "can't acquire live glock: %d\n", error); | |
421 | goto fail_mount; | |
422 | } | |
423 | ||
424 | error = gfs2_glock_get(sdp, GFS2_RENAME_LOCK, &gfs2_nondisk_glops, | |
425 | CREATE, &sdp->sd_rename_gl); | |
426 | if (error) { | |
427 | fs_err(sdp, "can't create rename glock: %d\n", error); | |
428 | goto fail_live; | |
429 | } | |
430 | ||
24972557 BM |
431 | error = gfs2_glock_get(sdp, GFS2_FREEZE_LOCK, &gfs2_freeze_glops, |
432 | CREATE, &sdp->sd_freeze_gl); | |
b3b94faa DT |
433 | if (error) { |
434 | fs_err(sdp, "can't create transaction glock: %d\n", error); | |
435 | goto fail_rename; | |
436 | } | |
b3b94faa DT |
437 | |
438 | return 0; | |
439 | ||
feaa7bba | 440 | fail_trans: |
24972557 | 441 | gfs2_glock_put(sdp->sd_freeze_gl); |
feaa7bba | 442 | fail_rename: |
b3b94faa | 443 | gfs2_glock_put(sdp->sd_rename_gl); |
feaa7bba | 444 | fail_live: |
b3b94faa | 445 | gfs2_glock_dq_uninit(&sdp->sd_live_gh); |
feaa7bba | 446 | fail_mount: |
b3b94faa | 447 | gfs2_glock_dq_uninit(mount_gh); |
feaa7bba | 448 | fail: |
b3b94faa DT |
449 | return error; |
450 | } | |
451 | ||
9b8df98f SW |
452 | static int gfs2_lookup_root(struct super_block *sb, struct dentry **dptr, |
453 | u64 no_addr, const char *name) | |
f42faf4f | 454 | { |
9b8df98f SW |
455 | struct gfs2_sbd *sdp = sb->s_fs_info; |
456 | struct dentry *dentry; | |
457 | struct inode *inode; | |
458 | ||
3ce37b2c AG |
459 | inode = gfs2_inode_lookup(sb, DT_DIR, no_addr, 0, |
460 | GFS2_BLKST_FREE /* ignore */); | |
9b8df98f SW |
461 | if (IS_ERR(inode)) { |
462 | fs_err(sdp, "can't read in %s inode: %ld\n", name, PTR_ERR(inode)); | |
463 | return PTR_ERR(inode); | |
464 | } | |
48fde701 | 465 | dentry = d_make_root(inode); |
9b8df98f SW |
466 | if (!dentry) { |
467 | fs_err(sdp, "can't alloc %s dentry\n", name); | |
9b8df98f SW |
468 | return -ENOMEM; |
469 | } | |
9b8df98f SW |
470 | *dptr = dentry; |
471 | return 0; | |
f42faf4f SW |
472 | } |
473 | ||
9b8df98f | 474 | static int init_sb(struct gfs2_sbd *sdp, int silent) |
b3b94faa DT |
475 | { |
476 | struct super_block *sb = sdp->sd_vfs; | |
477 | struct gfs2_holder sb_gh; | |
dbb7cae2 | 478 | u64 no_addr; |
9b8df98f | 479 | int ret; |
b3b94faa | 480 | |
9b8df98f SW |
481 | ret = gfs2_glock_nq_num(sdp, GFS2_SB_LOCK, &gfs2_meta_glops, |
482 | LM_ST_SHARED, 0, &sb_gh); | |
483 | if (ret) { | |
484 | fs_err(sdp, "can't acquire superblock glock: %d\n", ret); | |
485 | return ret; | |
b3b94faa | 486 | } |
907b9bce | 487 | |
6bac243f | 488 | ret = gfs2_read_sb(sdp, silent); |
9b8df98f SW |
489 | if (ret) { |
490 | fs_err(sdp, "can't read superblock: %d\n", ret); | |
b3b94faa DT |
491 | goto out; |
492 | } | |
493 | ||
494 | /* Set up the buffer cache and SB for real */ | |
e1defc4f | 495 | if (sdp->sd_sb.sb_bsize < bdev_logical_block_size(sb->s_bdev)) { |
9b8df98f | 496 | ret = -EINVAL; |
b3b94faa DT |
497 | fs_err(sdp, "FS block size (%u) is too small for device " |
498 | "block size (%u)\n", | |
e1defc4f | 499 | sdp->sd_sb.sb_bsize, bdev_logical_block_size(sb->s_bdev)); |
b3b94faa DT |
500 | goto out; |
501 | } | |
502 | if (sdp->sd_sb.sb_bsize > PAGE_SIZE) { | |
9b8df98f | 503 | ret = -EINVAL; |
b3b94faa DT |
504 | fs_err(sdp, "FS block size (%u) is too big for machine " |
505 | "page size (%u)\n", | |
506 | sdp->sd_sb.sb_bsize, (unsigned int)PAGE_SIZE); | |
507 | goto out; | |
508 | } | |
b3b94faa DT |
509 | sb_set_blocksize(sb, sdp->sd_sb.sb_bsize); |
510 | ||
f42faf4f | 511 | /* Get the root inode */ |
dbb7cae2 | 512 | no_addr = sdp->sd_sb.sb_root_dir.no_addr; |
9b8df98f SW |
513 | ret = gfs2_lookup_root(sb, &sdp->sd_root_dir, no_addr, "root"); |
514 | if (ret) | |
f42faf4f | 515 | goto out; |
b3b94faa | 516 | |
9b8df98f SW |
517 | /* Get the master inode */ |
518 | no_addr = sdp->sd_sb.sb_master_dir.no_addr; | |
519 | ret = gfs2_lookup_root(sb, &sdp->sd_master_dir, no_addr, "master"); | |
520 | if (ret) { | |
521 | dput(sdp->sd_root_dir); | |
522 | goto out; | |
523 | } | |
524 | sb->s_root = dget(sdp->sd_args.ar_meta ? sdp->sd_master_dir : sdp->sd_root_dir); | |
f42faf4f | 525 | out: |
b3b94faa | 526 | gfs2_glock_dq_uninit(&sb_gh); |
9b8df98f | 527 | return ret; |
b3b94faa DT |
528 | } |
529 | ||
f057f6cd | 530 | static void gfs2_others_may_mount(struct gfs2_sbd *sdp) |
da755fdb | 531 | { |
f057f6cd SW |
532 | char *message = "FIRSTMOUNT=Done"; |
533 | char *envp[] = { message, NULL }; | |
e0c2a9aa DT |
534 | |
535 | fs_info(sdp, "first mount done, others may mount\n"); | |
536 | ||
537 | if (sdp->sd_lockstruct.ls_ops->lm_first_done) | |
538 | sdp->sd_lockstruct.ls_ops->lm_first_done(sdp); | |
539 | ||
f057f6cd | 540 | kobject_uevent_env(&sdp->sd_kobj, KOBJ_CHANGE, envp); |
da755fdb SW |
541 | } |
542 | ||
b5289681 SW |
543 | /** |
544 | * gfs2_jindex_hold - Grab a lock on the jindex | |
545 | * @sdp: The GFS2 superblock | |
546 | * @ji_gh: the holder for the jindex glock | |
547 | * | |
548 | * Returns: errno | |
549 | */ | |
550 | ||
551 | static int gfs2_jindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ji_gh) | |
552 | { | |
553 | struct gfs2_inode *dip = GFS2_I(sdp->sd_jindex); | |
554 | struct qstr name; | |
555 | char buf[20]; | |
556 | struct gfs2_jdesc *jd; | |
557 | int error; | |
558 | ||
559 | name.name = buf; | |
560 | ||
561 | mutex_lock(&sdp->sd_jindex_mutex); | |
562 | ||
563 | for (;;) { | |
564 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, ji_gh); | |
565 | if (error) | |
566 | break; | |
567 | ||
568 | name.len = sprintf(buf, "journal%u", sdp->sd_journals); | |
569 | name.hash = gfs2_disk_hash(name.name, name.len); | |
570 | ||
571 | error = gfs2_dir_check(sdp->sd_jindex, &name, NULL); | |
572 | if (error == -ENOENT) { | |
573 | error = 0; | |
574 | break; | |
575 | } | |
576 | ||
577 | gfs2_glock_dq_uninit(ji_gh); | |
578 | ||
579 | if (error) | |
580 | break; | |
581 | ||
582 | error = -ENOMEM; | |
583 | jd = kzalloc(sizeof(struct gfs2_jdesc), GFP_KERNEL); | |
584 | if (!jd) | |
585 | break; | |
586 | ||
587 | INIT_LIST_HEAD(&jd->extent_list); | |
a17d758b BP |
588 | INIT_LIST_HEAD(&jd->jd_revoke_list); |
589 | ||
6ecd7c2d | 590 | INIT_WORK(&jd->jd_work, gfs2_recover_func); |
b5289681 SW |
591 | jd->jd_inode = gfs2_lookupi(sdp->sd_jindex, &name, 1); |
592 | if (!jd->jd_inode || IS_ERR(jd->jd_inode)) { | |
593 | if (!jd->jd_inode) | |
594 | error = -ENOENT; | |
595 | else | |
596 | error = PTR_ERR(jd->jd_inode); | |
597 | kfree(jd); | |
598 | break; | |
599 | } | |
600 | ||
601 | spin_lock(&sdp->sd_jindex_spin); | |
602 | jd->jd_jid = sdp->sd_journals++; | |
603 | list_add_tail(&jd->jd_list, &sdp->sd_jindex_list); | |
604 | spin_unlock(&sdp->sd_jindex_spin); | |
605 | } | |
606 | ||
607 | mutex_unlock(&sdp->sd_jindex_mutex); | |
608 | ||
609 | return error; | |
610 | } | |
611 | ||
1d12d175 BP |
612 | /** |
613 | * check_journal_clean - Make sure a journal is clean for a spectator mount | |
614 | * @sdp: The GFS2 superblock | |
615 | * @jd: The journal descriptor | |
616 | * | |
617 | * Returns: 0 if the journal is clean or locked, else an error | |
618 | */ | |
619 | static int check_journal_clean(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd) | |
620 | { | |
621 | int error; | |
622 | struct gfs2_holder j_gh; | |
623 | struct gfs2_log_header_host head; | |
624 | struct gfs2_inode *ip; | |
625 | ||
626 | ip = GFS2_I(jd->jd_inode); | |
627 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_NOEXP | | |
628 | GL_EXACT | GL_NOCACHE, &j_gh); | |
629 | if (error) { | |
630 | fs_err(sdp, "Error locking journal for spectator mount.\n"); | |
631 | return -EPERM; | |
632 | } | |
633 | error = gfs2_jdesc_check(jd); | |
634 | if (error) { | |
635 | fs_err(sdp, "Error checking journal for spectator mount.\n"); | |
636 | goto out_unlock; | |
637 | } | |
638 | error = gfs2_find_jhead(jd, &head); | |
639 | if (error) { | |
640 | fs_err(sdp, "Error parsing journal for spectator mount.\n"); | |
641 | goto out_unlock; | |
642 | } | |
643 | if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) { | |
644 | error = -EPERM; | |
645 | fs_err(sdp, "jid=%u: Journal is dirty, so the first mounter " | |
646 | "must not be a spectator.\n", jd->jd_jid); | |
647 | } | |
648 | ||
649 | out_unlock: | |
650 | gfs2_glock_dq_uninit(&j_gh); | |
651 | return error; | |
652 | } | |
653 | ||
b3b94faa DT |
654 | static int init_journal(struct gfs2_sbd *sdp, int undo) |
655 | { | |
2b0143b5 | 656 | struct inode *master = d_inode(sdp->sd_master_dir); |
b3b94faa | 657 | struct gfs2_holder ji_gh; |
5c676f6d | 658 | struct gfs2_inode *ip; |
b3b94faa DT |
659 | int jindex = 1; |
660 | int error = 0; | |
661 | ||
662 | if (undo) { | |
663 | jindex = 0; | |
fe64d517 | 664 | goto fail_jinode_gh; |
b3b94faa DT |
665 | } |
666 | ||
9b8df98f | 667 | sdp->sd_jindex = gfs2_lookup_simple(master, "jindex"); |
c752666c | 668 | if (IS_ERR(sdp->sd_jindex)) { |
b3b94faa | 669 | fs_err(sdp, "can't lookup journal index: %d\n", error); |
c752666c | 670 | return PTR_ERR(sdp->sd_jindex); |
b3b94faa | 671 | } |
b3b94faa DT |
672 | |
673 | /* Load in the journal index special file */ | |
674 | ||
675 | error = gfs2_jindex_hold(sdp, &ji_gh); | |
676 | if (error) { | |
677 | fs_err(sdp, "can't read journal index: %d\n", error); | |
678 | goto fail; | |
679 | } | |
680 | ||
0e5a9fb0 | 681 | error = -EUSERS; |
b3b94faa DT |
682 | if (!gfs2_jindex_size(sdp)) { |
683 | fs_err(sdp, "no journals!\n"); | |
907b9bce | 684 | goto fail_jindex; |
b3b94faa DT |
685 | } |
686 | ||
f07b3520 | 687 | atomic_set(&sdp->sd_log_blks_needed, 0); |
b3b94faa DT |
688 | if (sdp->sd_args.ar_spectator) { |
689 | sdp->sd_jdesc = gfs2_jdesc_find(sdp, 0); | |
fd041f0b | 690 | atomic_set(&sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks); |
5e687eac BM |
691 | atomic_set(&sdp->sd_log_thresh1, 2*sdp->sd_jdesc->jd_blocks/5); |
692 | atomic_set(&sdp->sd_log_thresh2, 4*sdp->sd_jdesc->jd_blocks/5); | |
b3b94faa DT |
693 | } else { |
694 | if (sdp->sd_lockstruct.ls_jid >= gfs2_jindex_size(sdp)) { | |
695 | fs_err(sdp, "can't mount journal #%u\n", | |
696 | sdp->sd_lockstruct.ls_jid); | |
697 | fs_err(sdp, "there are only %u journals (0 - %u)\n", | |
698 | gfs2_jindex_size(sdp), | |
699 | gfs2_jindex_size(sdp) - 1); | |
700 | goto fail_jindex; | |
701 | } | |
702 | sdp->sd_jdesc = gfs2_jdesc_find(sdp, sdp->sd_lockstruct.ls_jid); | |
703 | ||
feaa7bba | 704 | error = gfs2_glock_nq_num(sdp, sdp->sd_lockstruct.ls_jid, |
b3b94faa DT |
705 | &gfs2_journal_glops, |
706 | LM_ST_EXCLUSIVE, LM_FLAG_NOEXP, | |
707 | &sdp->sd_journal_gh); | |
708 | if (error) { | |
709 | fs_err(sdp, "can't acquire journal glock: %d\n", error); | |
710 | goto fail_jindex; | |
711 | } | |
712 | ||
feaa7bba SW |
713 | ip = GFS2_I(sdp->sd_jdesc->jd_inode); |
714 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, | |
75be73a8 | 715 | LM_FLAG_NOEXP | GL_EXACT | GL_NOCACHE, |
b3b94faa DT |
716 | &sdp->sd_jinode_gh); |
717 | if (error) { | |
718 | fs_err(sdp, "can't acquire journal inode glock: %d\n", | |
719 | error); | |
720 | goto fail_journal_gh; | |
721 | } | |
722 | ||
723 | error = gfs2_jdesc_check(sdp->sd_jdesc); | |
724 | if (error) { | |
725 | fs_err(sdp, "my journal (%u) is bad: %d\n", | |
726 | sdp->sd_jdesc->jd_jid, error); | |
727 | goto fail_jinode_gh; | |
728 | } | |
fd041f0b | 729 | atomic_set(&sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks); |
5e687eac BM |
730 | atomic_set(&sdp->sd_log_thresh1, 2*sdp->sd_jdesc->jd_blocks/5); |
731 | atomic_set(&sdp->sd_log_thresh2, 4*sdp->sd_jdesc->jd_blocks/5); | |
da6dd40d BP |
732 | |
733 | /* Map the extents for this journal's blocks */ | |
b50f227b | 734 | gfs2_map_journal_extents(sdp, sdp->sd_jdesc); |
b3b94faa | 735 | } |
63997775 | 736 | trace_gfs2_log_blocks(sdp, atomic_read(&sdp->sd_log_blks_free)); |
b3b94faa DT |
737 | |
738 | if (sdp->sd_lockstruct.ls_first) { | |
739 | unsigned int x; | |
740 | for (x = 0; x < sdp->sd_journals; x++) { | |
1d12d175 BP |
741 | struct gfs2_jdesc *jd = gfs2_jdesc_find(sdp, x); |
742 | ||
743 | if (sdp->sd_args.ar_spectator) { | |
744 | error = check_journal_clean(sdp, jd); | |
745 | if (error) | |
746 | goto fail_jinode_gh; | |
747 | continue; | |
748 | } | |
749 | error = gfs2_recover_journal(jd, true); | |
b3b94faa DT |
750 | if (error) { |
751 | fs_err(sdp, "error recovering journal %u: %d\n", | |
752 | x, error); | |
753 | goto fail_jinode_gh; | |
754 | } | |
755 | } | |
756 | ||
f057f6cd | 757 | gfs2_others_may_mount(sdp); |
b3b94faa | 758 | } else if (!sdp->sd_args.ar_spectator) { |
6ecd7c2d | 759 | error = gfs2_recover_journal(sdp->sd_jdesc, true); |
b3b94faa DT |
760 | if (error) { |
761 | fs_err(sdp, "error recovering my journal: %d\n", error); | |
762 | goto fail_jinode_gh; | |
763 | } | |
764 | } | |
765 | ||
086cc672 | 766 | sdp->sd_log_idle = 1; |
b3b94faa DT |
767 | set_bit(SDF_JOURNAL_CHECKED, &sdp->sd_flags); |
768 | gfs2_glock_dq_uninit(&ji_gh); | |
769 | jindex = 0; | |
2e60d768 | 770 | INIT_WORK(&sdp->sd_freeze_work, gfs2_freeze_func); |
b3b94faa DT |
771 | return 0; |
772 | ||
a91ea69f | 773 | fail_jinode_gh: |
b3b94faa DT |
774 | if (!sdp->sd_args.ar_spectator) |
775 | gfs2_glock_dq_uninit(&sdp->sd_jinode_gh); | |
a91ea69f | 776 | fail_journal_gh: |
b3b94faa DT |
777 | if (!sdp->sd_args.ar_spectator) |
778 | gfs2_glock_dq_uninit(&sdp->sd_journal_gh); | |
a91ea69f | 779 | fail_jindex: |
b3b94faa DT |
780 | gfs2_jindex_free(sdp); |
781 | if (jindex) | |
782 | gfs2_glock_dq_uninit(&ji_gh); | |
a91ea69f | 783 | fail: |
f42faf4f | 784 | iput(sdp->sd_jindex); |
b3b94faa DT |
785 | return error; |
786 | } | |
787 | ||
56aa72d0 | 788 | static struct lock_class_key gfs2_quota_imutex_key; |
b3b94faa DT |
789 | |
790 | static int init_inodes(struct gfs2_sbd *sdp, int undo) | |
791 | { | |
b3b94faa | 792 | int error = 0; |
2b0143b5 | 793 | struct inode *master = d_inode(sdp->sd_master_dir); |
b3b94faa DT |
794 | |
795 | if (undo) | |
f42faf4f SW |
796 | goto fail_qinode; |
797 | ||
f42faf4f | 798 | error = init_journal(sdp, undo); |
0e48e055 | 799 | complete_all(&sdp->sd_journal_ready); |
f42faf4f | 800 | if (error) |
9b8df98f | 801 | goto fail; |
b3b94faa | 802 | |
b3b94faa | 803 | /* Read in the master statfs inode */ |
9b8df98f | 804 | sdp->sd_statfs_inode = gfs2_lookup_simple(master, "statfs"); |
c752666c SW |
805 | if (IS_ERR(sdp->sd_statfs_inode)) { |
806 | error = PTR_ERR(sdp->sd_statfs_inode); | |
b3b94faa | 807 | fs_err(sdp, "can't read in statfs inode: %d\n", error); |
8d8291ae | 808 | goto fail_journal; |
b3b94faa DT |
809 | } |
810 | ||
811 | /* Read in the resource index inode */ | |
9b8df98f | 812 | sdp->sd_rindex = gfs2_lookup_simple(master, "rindex"); |
c752666c SW |
813 | if (IS_ERR(sdp->sd_rindex)) { |
814 | error = PTR_ERR(sdp->sd_rindex); | |
b3b94faa DT |
815 | fs_err(sdp, "can't get resource index inode: %d\n", error); |
816 | goto fail_statfs; | |
817 | } | |
cf45b752 | 818 | sdp->sd_rindex_uptodate = 0; |
b3b94faa DT |
819 | |
820 | /* Read in the quota inode */ | |
9b8df98f | 821 | sdp->sd_quota_inode = gfs2_lookup_simple(master, "quota"); |
c752666c SW |
822 | if (IS_ERR(sdp->sd_quota_inode)) { |
823 | error = PTR_ERR(sdp->sd_quota_inode); | |
b3b94faa DT |
824 | fs_err(sdp, "can't get quota file inode: %d\n", error); |
825 | goto fail_rindex; | |
826 | } | |
56aa72d0 JK |
827 | /* |
828 | * i_mutex on quota files is special. Since this inode is hidden system | |
829 | * file, we are safe to define locking ourselves. | |
830 | */ | |
9902af79 | 831 | lockdep_set_class(&sdp->sd_quota_inode->i_rwsem, |
56aa72d0 | 832 | &gfs2_quota_imutex_key); |
a365fbf3 SW |
833 | |
834 | error = gfs2_rindex_update(sdp); | |
835 | if (error) | |
836 | goto fail_qinode; | |
837 | ||
b3b94faa DT |
838 | return 0; |
839 | ||
f42faf4f SW |
840 | fail_qinode: |
841 | iput(sdp->sd_quota_inode); | |
f42faf4f | 842 | fail_rindex: |
b3b94faa | 843 | gfs2_clear_rgrpd(sdp); |
f42faf4f | 844 | iput(sdp->sd_rindex); |
f42faf4f SW |
845 | fail_statfs: |
846 | iput(sdp->sd_statfs_inode); | |
f42faf4f SW |
847 | fail_journal: |
848 | init_journal(sdp, UNDO); | |
f42faf4f | 849 | fail: |
b3b94faa DT |
850 | return error; |
851 | } | |
852 | ||
853 | static int init_per_node(struct gfs2_sbd *sdp, int undo) | |
854 | { | |
f42faf4f | 855 | struct inode *pn = NULL; |
b3b94faa DT |
856 | char buf[30]; |
857 | int error = 0; | |
5c676f6d | 858 | struct gfs2_inode *ip; |
2b0143b5 | 859 | struct inode *master = d_inode(sdp->sd_master_dir); |
b3b94faa DT |
860 | |
861 | if (sdp->sd_args.ar_spectator) | |
862 | return 0; | |
863 | ||
864 | if (undo) | |
865 | goto fail_qc_gh; | |
866 | ||
9b8df98f | 867 | pn = gfs2_lookup_simple(master, "per_node"); |
c752666c SW |
868 | if (IS_ERR(pn)) { |
869 | error = PTR_ERR(pn); | |
b3b94faa DT |
870 | fs_err(sdp, "can't find per_node directory: %d\n", error); |
871 | return error; | |
872 | } | |
873 | ||
b3b94faa | 874 | sprintf(buf, "statfs_change%u", sdp->sd_jdesc->jd_jid); |
c752666c SW |
875 | sdp->sd_sc_inode = gfs2_lookup_simple(pn, buf); |
876 | if (IS_ERR(sdp->sd_sc_inode)) { | |
877 | error = PTR_ERR(sdp->sd_sc_inode); | |
b3b94faa | 878 | fs_err(sdp, "can't find local \"sc\" file: %d\n", error); |
8d8291ae | 879 | goto fail; |
b3b94faa DT |
880 | } |
881 | ||
b3b94faa | 882 | sprintf(buf, "quota_change%u", sdp->sd_jdesc->jd_jid); |
c752666c SW |
883 | sdp->sd_qc_inode = gfs2_lookup_simple(pn, buf); |
884 | if (IS_ERR(sdp->sd_qc_inode)) { | |
885 | error = PTR_ERR(sdp->sd_qc_inode); | |
b3b94faa DT |
886 | fs_err(sdp, "can't find local \"qc\" file: %d\n", error); |
887 | goto fail_ut_i; | |
888 | } | |
889 | ||
f42faf4f | 890 | iput(pn); |
b3b94faa DT |
891 | pn = NULL; |
892 | ||
feaa7bba | 893 | ip = GFS2_I(sdp->sd_sc_inode); |
8d8291ae | 894 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, |
b3b94faa DT |
895 | &sdp->sd_sc_gh); |
896 | if (error) { | |
897 | fs_err(sdp, "can't lock local \"sc\" file: %d\n", error); | |
8d8291ae | 898 | goto fail_qc_i; |
b3b94faa DT |
899 | } |
900 | ||
feaa7bba | 901 | ip = GFS2_I(sdp->sd_qc_inode); |
8d8291ae | 902 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, |
b3b94faa DT |
903 | &sdp->sd_qc_gh); |
904 | if (error) { | |
905 | fs_err(sdp, "can't lock local \"qc\" file: %d\n", error); | |
906 | goto fail_ut_gh; | |
907 | } | |
908 | ||
909 | return 0; | |
910 | ||
a91ea69f | 911 | fail_qc_gh: |
b3b94faa | 912 | gfs2_glock_dq_uninit(&sdp->sd_qc_gh); |
a91ea69f | 913 | fail_ut_gh: |
b3b94faa | 914 | gfs2_glock_dq_uninit(&sdp->sd_sc_gh); |
a91ea69f | 915 | fail_qc_i: |
f42faf4f | 916 | iput(sdp->sd_qc_inode); |
a91ea69f | 917 | fail_ut_i: |
f42faf4f | 918 | iput(sdp->sd_sc_inode); |
a91ea69f | 919 | fail: |
6fde2242 | 920 | iput(pn); |
b3b94faa DT |
921 | return error; |
922 | } | |
923 | ||
f057f6cd SW |
924 | static const match_table_t nolock_tokens = { |
925 | { Opt_jid, "jid=%d\n", }, | |
926 | { Opt_err, NULL }, | |
927 | }; | |
928 | ||
929 | static const struct lm_lockops nolock_ops = { | |
930 | .lm_proto_name = "lock_nolock", | |
fc0e38da | 931 | .lm_put_lock = gfs2_glock_free, |
f057f6cd SW |
932 | .lm_tokens = &nolock_tokens, |
933 | }; | |
934 | ||
da755fdb SW |
935 | /** |
936 | * gfs2_lm_mount - mount a locking protocol | |
937 | * @sdp: the filesystem | |
3ad2f3fb | 938 | * @args: mount arguments |
da755fdb SW |
939 | * @silent: if 1, don't complain if the FS isn't a GFS2 fs |
940 | * | |
941 | * Returns: errno | |
942 | */ | |
943 | ||
944 | static int gfs2_lm_mount(struct gfs2_sbd *sdp, int silent) | |
945 | { | |
f057f6cd SW |
946 | const struct lm_lockops *lm; |
947 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; | |
948 | struct gfs2_args *args = &sdp->sd_args; | |
949 | const char *proto = sdp->sd_proto_name; | |
950 | const char *table = sdp->sd_table_name; | |
f057f6cd SW |
951 | char *o, *options; |
952 | int ret; | |
da755fdb | 953 | |
f057f6cd SW |
954 | if (!strcmp("lock_nolock", proto)) { |
955 | lm = &nolock_ops; | |
956 | sdp->sd_args.ar_localflocks = 1; | |
f057f6cd SW |
957 | #ifdef CONFIG_GFS2_FS_LOCKING_DLM |
958 | } else if (!strcmp("lock_dlm", proto)) { | |
959 | lm = &gfs2_dlm_ops; | |
960 | #endif | |
961 | } else { | |
d77d1b58 | 962 | pr_info("can't find protocol %s\n", proto); |
f057f6cd SW |
963 | return -ENOENT; |
964 | } | |
da755fdb SW |
965 | |
966 | fs_info(sdp, "Trying to join cluster \"%s\", \"%s\"\n", proto, table); | |
967 | ||
f057f6cd SW |
968 | ls->ls_ops = lm; |
969 | ls->ls_first = 1; | |
da755fdb | 970 | |
f057f6cd SW |
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; | |
ba6e9364 SW |
984 | if (test_and_clear_bit(SDF_NOJOURNALID, &sdp->sd_flags)) |
985 | ls->ls_jid = option; | |
f057f6cd SW |
986 | break; |
987 | case Opt_id: | |
4875647a | 988 | case Opt_nodir: |
2b88f7c5 | 989 | /* Obsolete, but left for backward compat purposes */ |
f057f6cd SW |
990 | break; |
991 | case Opt_first: | |
992 | ret = match_int(&tmp[0], &option); | |
993 | if (ret || (option != 0 && option != 1)) | |
994 | goto hostdata_error; | |
995 | ls->ls_first = option; | |
996 | break; | |
f057f6cd SW |
997 | case Opt_err: |
998 | default: | |
999 | hostdata_error: | |
1000 | fs_info(sdp, "unknown hostdata (%s)\n", o); | |
1001 | return -EINVAL; | |
1002 | } | |
da755fdb SW |
1003 | } |
1004 | ||
f057f6cd SW |
1005 | if (lm->lm_mount == NULL) { |
1006 | fs_info(sdp, "Now mounting FS...\n"); | |
19237039 | 1007 | complete_all(&sdp->sd_locking_init); |
f057f6cd | 1008 | return 0; |
da755fdb | 1009 | } |
e0c2a9aa | 1010 | ret = lm->lm_mount(sdp, table); |
f057f6cd SW |
1011 | if (ret == 0) |
1012 | fs_info(sdp, "Joined cluster. Now mounting FS...\n"); | |
19237039 | 1013 | complete_all(&sdp->sd_locking_init); |
f057f6cd | 1014 | return ret; |
da755fdb SW |
1015 | } |
1016 | ||
1017 | void gfs2_lm_unmount(struct gfs2_sbd *sdp) | |
1018 | { | |
f057f6cd SW |
1019 | const struct lm_lockops *lm = sdp->sd_lockstruct.ls_ops; |
1020 | if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) && | |
1021 | lm->lm_unmount) | |
1022 | lm->lm_unmount(sdp); | |
da755fdb | 1023 | } |
b3b94faa | 1024 | |
ba6e9364 SW |
1025 | static int wait_on_journal(struct gfs2_sbd *sdp) |
1026 | { | |
ba6e9364 SW |
1027 | if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL) |
1028 | return 0; | |
1029 | ||
74316201 N |
1030 | return wait_on_bit(&sdp->sd_flags, SDF_NOJOURNALID, TASK_INTERRUPTIBLE) |
1031 | ? -EINTR : 0; | |
ba6e9364 SW |
1032 | } |
1033 | ||
8633ecfa SW |
1034 | void gfs2_online_uevent(struct gfs2_sbd *sdp) |
1035 | { | |
1036 | struct super_block *sb = sdp->sd_vfs; | |
1037 | char ro[20]; | |
1038 | char spectator[20]; | |
1039 | char *envp[] = { ro, spectator, NULL }; | |
1040 | sprintf(ro, "RDONLY=%d", (sb->s_flags & MS_RDONLY) ? 1 : 0); | |
1041 | sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0); | |
1042 | kobject_uevent_env(&sdp->sd_kobj, KOBJ_ONLINE, envp); | |
1043 | } | |
1044 | ||
b3b94faa DT |
1045 | /** |
1046 | * fill_super - Read in superblock | |
1047 | * @sb: The VFS superblock | |
1048 | * @data: Mount options | |
1049 | * @silent: Don't complain if it's not a GFS2 filesystem | |
1050 | * | |
1051 | * Returns: errno | |
1052 | */ | |
1053 | ||
f55073ff | 1054 | static int fill_super(struct super_block *sb, struct gfs2_args *args, int silent) |
b3b94faa DT |
1055 | { |
1056 | struct gfs2_sbd *sdp; | |
1057 | struct gfs2_holder mount_gh; | |
1058 | int error; | |
1059 | ||
1060 | sdp = init_sbd(sb); | |
1061 | if (!sdp) { | |
d77d1b58 | 1062 | pr_warn("can't alloc struct gfs2_sbd\n"); |
b3b94faa DT |
1063 | return -ENOMEM; |
1064 | } | |
f55073ff | 1065 | sdp->sd_args = *args; |
b3b94faa | 1066 | |
fe64d517 | 1067 | if (sdp->sd_args.ar_spectator) { |
6f04c1c7 | 1068 | sb->s_flags |= MS_RDONLY; |
e8ca5cc5 | 1069 | set_bit(SDF_RORECOVERY, &sdp->sd_flags); |
fe64d517 | 1070 | } |
6f04c1c7 SW |
1071 | if (sdp->sd_args.ar_posix_acl) |
1072 | sb->s_flags |= MS_POSIXACL; | |
f25934c5 CH |
1073 | if (sdp->sd_args.ar_nobarrier) |
1074 | set_bit(SDF_NOBARRIERS, &sdp->sd_flags); | |
6f04c1c7 | 1075 | |
9964afbb | 1076 | sb->s_flags |= MS_NOSEC; |
719ee344 SW |
1077 | sb->s_magic = GFS2_MAGIC; |
1078 | sb->s_op = &gfs2_super_ops; | |
41ced6dc | 1079 | sb->s_d_op = &gfs2_dops; |
719ee344 | 1080 | sb->s_export_op = &gfs2_export_ops; |
40b78a32 | 1081 | sb->s_xattr = gfs2_xattr_handlers; |
cc632e7f | 1082 | sb->s_qcop = &gfs2_quotactl_ops; |
de3b08d3 | 1083 | sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; |
cc632e7f | 1084 | sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; |
719ee344 SW |
1085 | sb->s_time_gran = 1; |
1086 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
419c93e0 SW |
1087 | |
1088 | /* Set up the buffer cache and fill in some fake block size values | |
1089 | to allow us to read-in the on-disk superblock. */ | |
1090 | sdp->sd_sb.sb_bsize = sb_min_blocksize(sb, GFS2_BASIC_BLOCK); | |
1091 | sdp->sd_sb.sb_bsize_shift = sb->s_blocksize_bits; | |
1092 | sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift - | |
1093 | GFS2_BASIC_BLOCK_SHIFT; | |
47a9a527 | 1094 | sdp->sd_fsb2bb = BIT(sdp->sd_fsb2bb_shift); |
b3b94faa | 1095 | |
5e687eac | 1096 | sdp->sd_tune.gt_logd_secs = sdp->sd_args.ar_commit; |
3d3c10f2 BM |
1097 | sdp->sd_tune.gt_quota_quantum = sdp->sd_args.ar_quota_quantum; |
1098 | if (sdp->sd_args.ar_statfs_quantum) { | |
1099 | sdp->sd_tune.gt_statfs_slow = 0; | |
1100 | sdp->sd_tune.gt_statfs_quantum = sdp->sd_args.ar_statfs_quantum; | |
32e471ef | 1101 | } else { |
3d3c10f2 BM |
1102 | sdp->sd_tune.gt_statfs_slow = 1; |
1103 | sdp->sd_tune.gt_statfs_quantum = 30; | |
1104 | } | |
48c2b613 | 1105 | |
b3b94faa | 1106 | error = init_names(sdp, silent); |
0d515210 BP |
1107 | if (error) { |
1108 | /* In this case, we haven't initialized sysfs, so we have to | |
1109 | manually free the sdp. */ | |
1110 | free_percpu(sdp->sd_lkstats); | |
1111 | kfree(sdp); | |
1112 | sb->s_fs_info = NULL; | |
1113 | return error; | |
1114 | } | |
b3b94faa | 1115 | |
e0c2a9aa DT |
1116 | snprintf(sdp->sd_fsname, GFS2_FSNAME_LEN, "%s", sdp->sd_table_name); |
1117 | ||
b3b94faa | 1118 | error = gfs2_sys_fs_add(sdp); |
0d515210 BP |
1119 | /* |
1120 | * If we hit an error here, gfs2_sys_fs_add will have called function | |
1121 | * kobject_put which causes the sysfs usage count to go to zero, which | |
1122 | * causes sysfs to call function gfs2_sbd_release, which frees sdp. | |
1123 | * Subsequent error paths here will call gfs2_sys_fs_del, which also | |
1124 | * kobject_put to free sdp. | |
1125 | */ | |
b3b94faa | 1126 | if (error) |
0d515210 BP |
1127 | return error; |
1128 | ||
1129 | gfs2_create_debugfs_file(sdp); | |
b3b94faa DT |
1130 | |
1131 | error = gfs2_lm_mount(sdp, silent); | |
1132 | if (error) | |
0d515210 | 1133 | goto fail_debug; |
b3b94faa DT |
1134 | |
1135 | error = init_locking(sdp, &mount_gh, DO); | |
1136 | if (error) | |
1137 | goto fail_lm; | |
1138 | ||
9b8df98f | 1139 | error = init_sb(sdp, silent); |
b3b94faa DT |
1140 | if (error) |
1141 | goto fail_locking; | |
b3b94faa | 1142 | |
ba6e9364 SW |
1143 | error = wait_on_journal(sdp); |
1144 | if (error) | |
1145 | goto fail_sb; | |
1146 | ||
feb47ca9 SW |
1147 | /* |
1148 | * If user space has failed to join the cluster or some similar | |
1149 | * failure has occurred, then the journal id will contain a | |
1150 | * negative (error) number. This will then be returned to the | |
1151 | * caller (of the mount syscall). We do this even for spectator | |
1152 | * mounts (which just write a jid of 0 to indicate "ok" even though | |
1153 | * the jid is unused in the spectator case) | |
1154 | */ | |
1155 | if (sdp->sd_lockstruct.ls_jid < 0) { | |
1156 | error = sdp->sd_lockstruct.ls_jid; | |
1157 | sdp->sd_lockstruct.ls_jid = 0; | |
1158 | goto fail_sb; | |
1159 | } | |
1160 | ||
e0c2a9aa DT |
1161 | if (sdp->sd_args.ar_spectator) |
1162 | snprintf(sdp->sd_fsname, GFS2_FSNAME_LEN, "%s.s", | |
1163 | sdp->sd_table_name); | |
1164 | else | |
1165 | snprintf(sdp->sd_fsname, GFS2_FSNAME_LEN, "%s.%u", | |
1166 | sdp->sd_table_name, sdp->sd_lockstruct.ls_jid); | |
1167 | ||
b3b94faa DT |
1168 | error = init_inodes(sdp, DO); |
1169 | if (error) | |
f42faf4f | 1170 | goto fail_sb; |
b3b94faa DT |
1171 | |
1172 | error = init_per_node(sdp, DO); | |
1173 | if (error) | |
1174 | goto fail_inodes; | |
1175 | ||
1176 | error = gfs2_statfs_init(sdp); | |
1177 | if (error) { | |
1178 | fs_err(sdp, "can't initialize statfs subsystem: %d\n", error); | |
1179 | goto fail_per_node; | |
1180 | } | |
1181 | ||
b3b94faa DT |
1182 | if (!(sb->s_flags & MS_RDONLY)) { |
1183 | error = gfs2_make_fs_rw(sdp); | |
1184 | if (error) { | |
1185 | fs_err(sdp, "can't make FS RW: %d\n", error); | |
8ad151c2 | 1186 | goto fail_per_node; |
b3b94faa DT |
1187 | } |
1188 | } | |
1189 | ||
1190 | gfs2_glock_dq_uninit(&mount_gh); | |
8633ecfa | 1191 | gfs2_online_uevent(sdp); |
b3b94faa DT |
1192 | return 0; |
1193 | ||
a91ea69f | 1194 | fail_per_node: |
b3b94faa | 1195 | init_per_node(sdp, UNDO); |
a91ea69f | 1196 | fail_inodes: |
b3b94faa | 1197 | init_inodes(sdp, UNDO); |
a91ea69f | 1198 | fail_sb: |
9b8df98f SW |
1199 | if (sdp->sd_root_dir) |
1200 | dput(sdp->sd_root_dir); | |
1201 | if (sdp->sd_master_dir) | |
1202 | dput(sdp->sd_master_dir); | |
e7c8707e SW |
1203 | if (sb->s_root) |
1204 | dput(sb->s_root); | |
9b8df98f | 1205 | sb->s_root = NULL; |
a91ea69f | 1206 | fail_locking: |
b3b94faa | 1207 | init_locking(sdp, &mount_gh, UNDO); |
a91ea69f | 1208 | fail_lm: |
0e48e055 | 1209 | complete_all(&sdp->sd_journal_ready); |
fefc03bf | 1210 | gfs2_gl_hash_clear(sdp); |
b3b94faa | 1211 | gfs2_lm_unmount(sdp); |
0d515210 | 1212 | fail_debug: |
5f882096 | 1213 | gfs2_delete_debugfs_file(sdp); |
a245769f | 1214 | free_percpu(sdp->sd_lkstats); |
0d515210 BP |
1215 | /* gfs2_sys_fs_del must be the last thing we do, since it causes |
1216 | * sysfs to call function gfs2_sbd_release, which frees sdp. */ | |
1217 | gfs2_sys_fs_del(sdp); | |
5c676f6d | 1218 | sb->s_fs_info = NULL; |
b3b94faa DT |
1219 | return error; |
1220 | } | |
1221 | ||
f55073ff | 1222 | static int set_gfs2_super(struct super_block *s, void *data) |
b3b94faa | 1223 | { |
f55073ff SW |
1224 | s->s_bdev = data; |
1225 | s->s_dev = s->s_bdev->bd_dev; | |
95fe66de | 1226 | s->s_bdi = bdi_get(s->s_bdev->bd_bdi); |
f55073ff | 1227 | return 0; |
86384605 AD |
1228 | } |
1229 | ||
f55073ff | 1230 | static int test_gfs2_super(struct super_block *s, void *ptr) |
f6d03139 SW |
1231 | { |
1232 | struct block_device *bdev = ptr; | |
1233 | return (bdev == s->s_bdev); | |
1234 | } | |
1235 | ||
f55073ff | 1236 | /** |
8bcbbf00 | 1237 | * gfs2_mount - Get the GFS2 superblock |
f55073ff SW |
1238 | * @fs_type: The GFS2 filesystem type |
1239 | * @flags: Mount flags | |
1240 | * @dev_name: The name of the device | |
1241 | * @data: The mount arguments | |
f55073ff SW |
1242 | * |
1243 | * Q. Why not use get_sb_bdev() ? | |
1244 | * A. We need to select one of two root directories to mount, independent | |
1245 | * of whether this is the initial, or subsequent, mount of this sb | |
1246 | * | |
1247 | * Returns: 0 or -ve on error | |
1248 | */ | |
1249 | ||
8bcbbf00 AV |
1250 | static struct dentry *gfs2_mount(struct file_system_type *fs_type, int flags, |
1251 | const char *dev_name, void *data) | |
f55073ff SW |
1252 | { |
1253 | struct block_device *bdev; | |
1254 | struct super_block *s; | |
d4d77629 | 1255 | fmode_t mode = FMODE_READ | FMODE_EXCL; |
f55073ff SW |
1256 | int error; |
1257 | struct gfs2_args args; | |
1258 | struct gfs2_sbd *sdp; | |
1259 | ||
1260 | if (!(flags & MS_RDONLY)) | |
1261 | mode |= FMODE_WRITE; | |
1262 | ||
d4d77629 | 1263 | bdev = blkdev_get_by_path(dev_name, mode, fs_type); |
f55073ff | 1264 | if (IS_ERR(bdev)) |
8bcbbf00 | 1265 | return ERR_CAST(bdev); |
f55073ff SW |
1266 | |
1267 | /* | |
1268 | * once the super is inserted into the list by sget, s_umount | |
1269 | * will protect the lockfs code from trying to start a snapshot | |
1270 | * while we are mounting | |
1271 | */ | |
1272 | mutex_lock(&bdev->bd_fsfreeze_mutex); | |
1273 | if (bdev->bd_fsfreeze_count > 0) { | |
1274 | mutex_unlock(&bdev->bd_fsfreeze_mutex); | |
1275 | error = -EBUSY; | |
1276 | goto error_bdev; | |
1277 | } | |
9249e17f | 1278 | s = sget(fs_type, test_gfs2_super, set_gfs2_super, flags, bdev); |
f55073ff SW |
1279 | mutex_unlock(&bdev->bd_fsfreeze_mutex); |
1280 | error = PTR_ERR(s); | |
1281 | if (IS_ERR(s)) | |
1282 | goto error_bdev; | |
1283 | ||
dfe5b9ad SW |
1284 | if (s->s_root) { |
1285 | /* | |
1286 | * s_umount nests inside bd_mutex during | |
1287 | * __invalidate_device(). blkdev_put() acquires | |
1288 | * bd_mutex and can't be called under s_umount. Drop | |
1289 | * s_umount temporarily. This is safe as we're | |
1290 | * holding an active reference. | |
1291 | */ | |
1292 | up_write(&s->s_umount); | |
d4d77629 | 1293 | blkdev_put(bdev, mode); |
dfe5b9ad | 1294 | down_write(&s->s_umount); |
6de20eb0 AP |
1295 | } else { |
1296 | /* s_mode must be set before deactivate_locked_super calls */ | |
1297 | s->s_mode = mode; | |
dfe5b9ad | 1298 | } |
8bcbbf00 | 1299 | |
f55073ff SW |
1300 | memset(&args, 0, sizeof(args)); |
1301 | args.ar_quota = GFS2_QUOTA_DEFAULT; | |
1302 | args.ar_data = GFS2_DATA_DEFAULT; | |
5e687eac | 1303 | args.ar_commit = 30; |
3d3c10f2 BM |
1304 | args.ar_statfs_quantum = 30; |
1305 | args.ar_quota_quantum = 60; | |
f55073ff SW |
1306 | args.ar_errors = GFS2_ERRORS_DEFAULT; |
1307 | ||
1308 | error = gfs2_mount_args(&args, data); | |
1309 | if (error) { | |
d77d1b58 | 1310 | pr_warn("can't parse mount arguments\n"); |
8bcbbf00 | 1311 | goto error_super; |
f55073ff SW |
1312 | } |
1313 | ||
1314 | if (s->s_root) { | |
1315 | error = -EBUSY; | |
1316 | if ((flags ^ s->s_flags) & MS_RDONLY) | |
1317 | goto error_super; | |
f55073ff | 1318 | } else { |
a1c6f057 | 1319 | snprintf(s->s_id, sizeof(s->s_id), "%pg", bdev); |
f55073ff SW |
1320 | sb_set_blocksize(s, block_size(bdev)); |
1321 | error = fill_super(s, &args, flags & MS_SILENT ? 1 : 0); | |
8bcbbf00 AV |
1322 | if (error) |
1323 | goto error_super; | |
f55073ff SW |
1324 | s->s_flags |= MS_ACTIVE; |
1325 | bdev->bd_super = s; | |
1326 | } | |
1327 | ||
1328 | sdp = s->s_fs_info; | |
f55073ff | 1329 | if (args.ar_meta) |
8bcbbf00 | 1330 | return dget(sdp->sd_master_dir); |
f55073ff | 1331 | else |
8bcbbf00 | 1332 | return dget(sdp->sd_root_dir); |
f55073ff SW |
1333 | |
1334 | error_super: | |
1335 | deactivate_locked_super(s); | |
8bcbbf00 | 1336 | return ERR_PTR(error); |
f55073ff | 1337 | error_bdev: |
d4d77629 | 1338 | blkdev_put(bdev, mode); |
8bcbbf00 | 1339 | return ERR_PTR(error); |
f55073ff SW |
1340 | } |
1341 | ||
f6d03139 SW |
1342 | static int set_meta_super(struct super_block *s, void *ptr) |
1343 | { | |
1344 | return -EINVAL; | |
1345 | } | |
1346 | ||
8bcbbf00 AV |
1347 | static struct dentry *gfs2_mount_meta(struct file_system_type *fs_type, |
1348 | int flags, const char *dev_name, void *data) | |
86384605 | 1349 | { |
f6d03139 | 1350 | struct super_block *s; |
003dec89 | 1351 | struct gfs2_sbd *sdp; |
e24977d4 | 1352 | struct path path; |
86384605 | 1353 | int error; |
907b9bce | 1354 | |
e24977d4 | 1355 | error = kern_path(dev_name, LOOKUP_FOLLOW, &path); |
86384605 | 1356 | if (error) { |
d77d1b58 JP |
1357 | pr_warn("path_lookup on %s returned error %d\n", |
1358 | dev_name, error); | |
8bcbbf00 | 1359 | return ERR_PTR(error); |
86384605 | 1360 | } |
9249e17f | 1361 | s = sget(&gfs2_fs_type, test_gfs2_super, set_meta_super, flags, |
fc64005c | 1362 | path.dentry->d_sb->s_bdev); |
e24977d4 | 1363 | path_put(&path); |
f6d03139 | 1364 | if (IS_ERR(s)) { |
d77d1b58 | 1365 | pr_warn("gfs2 mount does not exist\n"); |
8bcbbf00 | 1366 | return ERR_CAST(s); |
86384605 | 1367 | } |
f55073ff SW |
1368 | if ((flags ^ s->s_flags) & MS_RDONLY) { |
1369 | deactivate_locked_super(s); | |
8bcbbf00 | 1370 | return ERR_PTR(-EBUSY); |
f55073ff | 1371 | } |
f6d03139 | 1372 | sdp = s->s_fs_info; |
8bcbbf00 | 1373 | return dget(sdp->sd_master_dir); |
b3b94faa DT |
1374 | } |
1375 | ||
419c93e0 | 1376 | static void gfs2_kill_sb(struct super_block *sb) |
86384605 AD |
1377 | { |
1378 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
88a19ad0 SW |
1379 | |
1380 | if (sdp == NULL) { | |
1381 | kill_block_super(sb); | |
1382 | return; | |
3af165ac | 1383 | } |
88a19ad0 | 1384 | |
24972557 | 1385 | gfs2_log_flush(sdp, NULL, SYNC_FLUSH); |
88a19ad0 SW |
1386 | dput(sdp->sd_root_dir); |
1387 | dput(sdp->sd_master_dir); | |
1388 | sdp->sd_root_dir = NULL; | |
1389 | sdp->sd_master_dir = NULL; | |
fefc03bf | 1390 | shrink_dcache_sb(sb); |
88a19ad0 | 1391 | gfs2_delete_debugfs_file(sdp); |
a245769f | 1392 | free_percpu(sdp->sd_lkstats); |
0d515210 | 1393 | kill_block_super(sb); |
86384605 AD |
1394 | } |
1395 | ||
b3b94faa DT |
1396 | struct file_system_type gfs2_fs_type = { |
1397 | .name = "gfs2", | |
1398 | .fs_flags = FS_REQUIRES_DEV, | |
8bcbbf00 | 1399 | .mount = gfs2_mount, |
419c93e0 SW |
1400 | .kill_sb = gfs2_kill_sb, |
1401 | .owner = THIS_MODULE, | |
1402 | }; | |
7f78e035 | 1403 | MODULE_ALIAS_FS("gfs2"); |
419c93e0 SW |
1404 | |
1405 | struct file_system_type gfs2meta_fs_type = { | |
1406 | .name = "gfs2meta", | |
1407 | .fs_flags = FS_REQUIRES_DEV, | |
8bcbbf00 | 1408 | .mount = gfs2_mount_meta, |
b3b94faa DT |
1409 | .owner = THIS_MODULE, |
1410 | }; | |
7f78e035 | 1411 | MODULE_ALIAS_FS("gfs2meta"); |