Commit | Line | Data |
---|---|---|
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> |
b3b94faa DT |
26 | |
27 | #include "gfs2.h" | |
5c676f6d | 28 | #include "incore.h" |
da6dd40d | 29 | #include "bmap.h" |
b3b94faa DT |
30 | #include "glock.h" |
31 | #include "glops.h" | |
32 | #include "inode.h" | |
b3b94faa DT |
33 | #include "recovery.h" |
34 | #include "rgrp.h" | |
35 | #include "super.h" | |
b3b94faa | 36 | #include "sys.h" |
5c676f6d | 37 | #include "util.h" |
bb3b0e3d | 38 | #include "log.h" |
9ac1b4d9 | 39 | #include "quota.h" |
b5289681 | 40 | #include "dir.h" |
70d4ee94 | 41 | #include "meta_io.h" |
63997775 | 42 | #include "trace_gfs2.h" |
b3b94faa DT |
43 | |
44 | #define DO 0 | |
45 | #define UNDO 1 | |
46 | ||
9b8df98f SW |
47 | /** |
48 | * gfs2_tune_init - Fill a gfs2_tune structure with default values | |
49 | * @gt: tune | |
50 | * | |
51 | */ | |
52 | ||
53 | static void gfs2_tune_init(struct gfs2_tune *gt) | |
54 | { | |
55 | spin_lock_init(>->gt_spin); | |
56 | ||
9b8df98f SW |
57 | gt->gt_quota_warn_period = 10; |
58 | gt->gt_quota_scale_num = 1; | |
59 | gt->gt_quota_scale_den = 1; | |
9b8df98f SW |
60 | gt->gt_new_files_jdata = 0; |
61 | gt->gt_max_readahead = 1 << 18; | |
9b8df98f | 62 | gt->gt_complain_secs = 10; |
9b8df98f SW |
63 | } |
64 | ||
b3b94faa DT |
65 | static struct gfs2_sbd *init_sbd(struct super_block *sb) |
66 | { | |
67 | struct gfs2_sbd *sdp; | |
70d4ee94 | 68 | struct address_space *mapping; |
b3b94faa | 69 | |
85d1da67 | 70 | sdp = kzalloc(sizeof(struct gfs2_sbd), GFP_KERNEL); |
b3b94faa DT |
71 | if (!sdp) |
72 | return NULL; | |
73 | ||
5c676f6d | 74 | sb->s_fs_info = sdp; |
b3b94faa | 75 | sdp->sd_vfs = sb; |
a245769f SW |
76 | sdp->sd_lkstats = alloc_percpu(struct gfs2_pcpu_lkstats); |
77 | if (!sdp->sd_lkstats) { | |
78 | kfree(sdp); | |
79 | return NULL; | |
80 | } | |
81 | ||
ba6e9364 | 82 | set_bit(SDF_NOJOURNALID, &sdp->sd_flags); |
b3b94faa DT |
83 | gfs2_tune_init(&sdp->sd_tune); |
84 | ||
e402746a SW |
85 | init_waitqueue_head(&sdp->sd_glock_wait); |
86 | atomic_set(&sdp->sd_glock_disposal, 0); | |
3942ae53 | 87 | init_completion(&sdp->sd_locking_init); |
fd95e81c | 88 | init_completion(&sdp->sd_wdack); |
b3b94faa | 89 | spin_lock_init(&sdp->sd_statfs_spin); |
b3b94faa DT |
90 | |
91 | spin_lock_init(&sdp->sd_rindex_spin); | |
7c9ca621 | 92 | sdp->sd_rindex_tree.rb_node = NULL; |
b3b94faa DT |
93 | |
94 | INIT_LIST_HEAD(&sdp->sd_jindex_list); | |
95 | spin_lock_init(&sdp->sd_jindex_spin); | |
f55ab26a | 96 | mutex_init(&sdp->sd_jindex_mutex); |
0e48e055 | 97 | init_completion(&sdp->sd_journal_ready); |
b3b94faa | 98 | |
b3b94faa | 99 | INIT_LIST_HEAD(&sdp->sd_quota_list); |
f55ab26a | 100 | mutex_init(&sdp->sd_quota_mutex); |
e46c772d | 101 | mutex_init(&sdp->sd_quota_sync_mutex); |
37b2c837 | 102 | init_waitqueue_head(&sdp->sd_quota_wait); |
813e0c46 SW |
103 | INIT_LIST_HEAD(&sdp->sd_trunc_list); |
104 | spin_lock_init(&sdp->sd_trunc_lock); | |
2d9e7230 | 105 | spin_lock_init(&sdp->sd_bitmap_lock); |
b3b94faa | 106 | |
70d4ee94 SW |
107 | mapping = &sdp->sd_aspace; |
108 | ||
39849d69 | 109 | address_space_init_once(mapping); |
1b2ad412 | 110 | mapping->a_ops = &gfs2_rgrp_aops; |
70d4ee94 SW |
111 | mapping->host = sb->s_bdev->bd_inode; |
112 | mapping->flags = 0; | |
113 | mapping_set_gfp_mask(mapping, GFP_NOFS); | |
114 | mapping->private_data = NULL; | |
70d4ee94 SW |
115 | mapping->writeback_index = 0; |
116 | ||
b3b94faa | 117 | spin_lock_init(&sdp->sd_log_lock); |
5e687eac | 118 | atomic_set(&sdp->sd_log_pinned, 0); |
b3b94faa | 119 | INIT_LIST_HEAD(&sdp->sd_log_le_revoke); |
d7b616e2 | 120 | INIT_LIST_HEAD(&sdp->sd_log_le_ordered); |
45138990 | 121 | spin_lock_init(&sdp->sd_ordered_lock); |
b3b94faa | 122 | |
5e687eac BM |
123 | init_waitqueue_head(&sdp->sd_log_waitq); |
124 | init_waitqueue_head(&sdp->sd_logd_waitq); | |
d6a079e8 | 125 | spin_lock_init(&sdp->sd_ail_lock); |
b3b94faa DT |
126 | INIT_LIST_HEAD(&sdp->sd_ail1_list); |
127 | INIT_LIST_HEAD(&sdp->sd_ail2_list); | |
128 | ||
484adff8 | 129 | init_rwsem(&sdp->sd_log_flush_lock); |
16615be1 | 130 | atomic_set(&sdp->sd_log_in_flight, 0); |
2e60d768 BM |
131 | atomic_set(&sdp->sd_reserving_log, 0); |
132 | init_waitqueue_head(&sdp->sd_reserving_log_wait); | |
16615be1 | 133 | init_waitqueue_head(&sdp->sd_log_flush_wait); |
2e60d768 BM |
134 | atomic_set(&sdp->sd_freeze_state, SFS_UNFROZEN); |
135 | mutex_init(&sdp->sd_freeze_mutex); | |
b3b94faa | 136 | |
b3b94faa DT |
137 | return sdp; |
138 | } | |
139 | ||
b3b94faa | 140 | |
9b8df98f SW |
141 | /** |
142 | * gfs2_check_sb - Check superblock | |
143 | * @sdp: the filesystem | |
144 | * @sb: The superblock | |
145 | * @silent: Don't print a message if the check fails | |
146 | * | |
147 | * Checks the version code of the FS is one that we understand how to | |
148 | * read and that the sizes of the various on-disk structures have not | |
149 | * changed. | |
150 | */ | |
151 | ||
32e471ef | 152 | static int gfs2_check_sb(struct gfs2_sbd *sdp, int silent) |
9b8df98f | 153 | { |
32e471ef SW |
154 | struct gfs2_sb_host *sb = &sdp->sd_sb; |
155 | ||
9b8df98f SW |
156 | if (sb->sb_magic != GFS2_MAGIC || |
157 | sb->sb_type != GFS2_METATYPE_SB) { | |
158 | if (!silent) | |
d77d1b58 | 159 | pr_warn("not a GFS2 filesystem\n"); |
9b8df98f SW |
160 | return -EINVAL; |
161 | } | |
162 | ||
163 | /* If format numbers match exactly, we're done. */ | |
164 | ||
165 | if (sb->sb_fs_format == GFS2_FORMAT_FS && | |
166 | sb->sb_multihost_format == GFS2_FORMAT_MULTI) | |
167 | return 0; | |
168 | ||
c80dbb58 | 169 | fs_warn(sdp, "Unknown on-disk format, unable to mount\n"); |
9b8df98f | 170 | |
c80dbb58 | 171 | return -EINVAL; |
9b8df98f SW |
172 | } |
173 | ||
4246a0b6 | 174 | static void end_bio_io_page(struct bio *bio) |
9b8df98f SW |
175 | { |
176 | struct page *page = bio->bi_private; | |
177 | ||
4246a0b6 | 178 | if (!bio->bi_error) |
9b8df98f SW |
179 | SetPageUptodate(page); |
180 | else | |
4246a0b6 | 181 | pr_warn("error %d reading superblock\n", bio->bi_error); |
9b8df98f SW |
182 | unlock_page(page); |
183 | } | |
184 | ||
32e471ef | 185 | static void gfs2_sb_in(struct gfs2_sbd *sdp, const void *buf) |
9b8df98f | 186 | { |
32e471ef SW |
187 | struct gfs2_sb_host *sb = &sdp->sd_sb; |
188 | struct super_block *s = sdp->sd_vfs; | |
9b8df98f SW |
189 | const struct gfs2_sb *str = buf; |
190 | ||
191 | sb->sb_magic = be32_to_cpu(str->sb_header.mh_magic); | |
192 | sb->sb_type = be32_to_cpu(str->sb_header.mh_type); | |
193 | sb->sb_format = be32_to_cpu(str->sb_header.mh_format); | |
194 | sb->sb_fs_format = be32_to_cpu(str->sb_fs_format); | |
195 | sb->sb_multihost_format = be32_to_cpu(str->sb_multihost_format); | |
196 | sb->sb_bsize = be32_to_cpu(str->sb_bsize); | |
197 | sb->sb_bsize_shift = be32_to_cpu(str->sb_bsize_shift); | |
198 | sb->sb_master_dir.no_addr = be64_to_cpu(str->sb_master_dir.no_addr); | |
199 | sb->sb_master_dir.no_formal_ino = be64_to_cpu(str->sb_master_dir.no_formal_ino); | |
200 | sb->sb_root_dir.no_addr = be64_to_cpu(str->sb_root_dir.no_addr); | |
201 | sb->sb_root_dir.no_formal_ino = be64_to_cpu(str->sb_root_dir.no_formal_ino); | |
202 | ||
203 | memcpy(sb->sb_lockproto, str->sb_lockproto, GFS2_LOCKNAME_LEN); | |
204 | memcpy(sb->sb_locktable, str->sb_locktable, GFS2_LOCKNAME_LEN); | |
32e471ef | 205 | memcpy(s->s_uuid, str->sb_uuid, 16); |
9b8df98f SW |
206 | } |
207 | ||
208 | /** | |
209 | * gfs2_read_super - Read the gfs2 super block from disk | |
210 | * @sdp: The GFS2 super block | |
211 | * @sector: The location of the super block | |
212 | * @error: The error code to return | |
213 | * | |
214 | * This uses the bio functions to read the super block from disk | |
215 | * because we want to be 100% sure that we never read cached data. | |
216 | * A super block is read twice only during each GFS2 mount and is | |
217 | * never written to by the filesystem. The first time its read no | |
218 | * locks are held, and the only details which are looked at are those | |
219 | * relating to the locking protocol. Once locking is up and working, | |
220 | * the sb is read again under the lock to establish the location of | |
221 | * the master directory (contains pointers to journals etc) and the | |
222 | * root directory. | |
223 | * | |
224 | * Returns: 0 on success or error | |
225 | */ | |
226 | ||
32e471ef | 227 | static int gfs2_read_super(struct gfs2_sbd *sdp, sector_t sector, int silent) |
9b8df98f SW |
228 | { |
229 | struct super_block *sb = sdp->sd_vfs; | |
230 | struct gfs2_sb *p; | |
231 | struct page *page; | |
232 | struct bio *bio; | |
233 | ||
234 | page = alloc_page(GFP_NOFS); | |
235 | if (unlikely(!page)) | |
ac3beb6a | 236 | return -ENOMEM; |
9b8df98f SW |
237 | |
238 | ClearPageUptodate(page); | |
239 | ClearPageDirty(page); | |
240 | lock_page(page); | |
241 | ||
242 | bio = bio_alloc(GFP_NOFS, 1); | |
4f024f37 | 243 | bio->bi_iter.bi_sector = sector * (sb->s_blocksize >> 9); |
9b8df98f SW |
244 | bio->bi_bdev = sb->s_bdev; |
245 | bio_add_page(bio, page, PAGE_SIZE, 0); | |
246 | ||
247 | bio->bi_end_io = end_bio_io_page; | |
248 | bio->bi_private = page; | |
4e49ea4a MC |
249 | bio->bi_rw = READ_SYNC | REQ_META; |
250 | submit_bio(bio); | |
9b8df98f SW |
251 | wait_on_page_locked(page); |
252 | bio_put(bio); | |
253 | if (!PageUptodate(page)) { | |
254 | __free_page(page); | |
255 | return -EIO; | |
256 | } | |
257 | p = kmap(page); | |
32e471ef | 258 | gfs2_sb_in(sdp, p); |
9b8df98f SW |
259 | kunmap(page); |
260 | __free_page(page); | |
32e471ef | 261 | return gfs2_check_sb(sdp, silent); |
9b8df98f | 262 | } |
6bac243f | 263 | |
9b8df98f SW |
264 | /** |
265 | * gfs2_read_sb - Read super block | |
266 | * @sdp: The GFS2 superblock | |
9b8df98f SW |
267 | * @silent: Don't print message if mount fails |
268 | * | |
269 | */ | |
270 | ||
6bac243f | 271 | static int gfs2_read_sb(struct gfs2_sbd *sdp, int silent) |
9b8df98f SW |
272 | { |
273 | u32 hash_blocks, ind_blocks, leaf_blocks; | |
274 | u32 tmp_blocks; | |
275 | unsigned int x; | |
276 | int error; | |
277 | ||
32e471ef | 278 | error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift, silent); |
9b8df98f SW |
279 | if (error) { |
280 | if (!silent) | |
281 | fs_err(sdp, "can't read superblock\n"); | |
282 | return error; | |
283 | } | |
284 | ||
9b8df98f SW |
285 | sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift - |
286 | GFS2_BASIC_BLOCK_SHIFT; | |
287 | sdp->sd_fsb2bb = 1 << sdp->sd_fsb2bb_shift; | |
288 | sdp->sd_diptrs = (sdp->sd_sb.sb_bsize - | |
289 | sizeof(struct gfs2_dinode)) / sizeof(u64); | |
290 | sdp->sd_inptrs = (sdp->sd_sb.sb_bsize - | |
291 | sizeof(struct gfs2_meta_header)) / sizeof(u64); | |
292 | sdp->sd_jbsize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_meta_header); | |
293 | sdp->sd_hash_bsize = sdp->sd_sb.sb_bsize / 2; | |
294 | sdp->sd_hash_bsize_shift = sdp->sd_sb.sb_bsize_shift - 1; | |
295 | sdp->sd_hash_ptrs = sdp->sd_hash_bsize / sizeof(u64); | |
296 | sdp->sd_qc_per_block = (sdp->sd_sb.sb_bsize - | |
297 | sizeof(struct gfs2_meta_header)) / | |
298 | sizeof(struct gfs2_quota_change); | |
a68a0a35 BP |
299 | sdp->sd_blocks_per_bitmap = (sdp->sd_sb.sb_bsize - |
300 | sizeof(struct gfs2_meta_header)) | |
301 | * GFS2_NBBY; /* not the rgrp bitmap, subsequent bitmaps only */ | |
9b8df98f SW |
302 | |
303 | /* Compute maximum reservation required to add a entry to a directory */ | |
304 | ||
305 | hash_blocks = DIV_ROUND_UP(sizeof(u64) * (1 << GFS2_DIR_MAX_DEPTH), | |
306 | sdp->sd_jbsize); | |
307 | ||
308 | ind_blocks = 0; | |
309 | for (tmp_blocks = hash_blocks; tmp_blocks > sdp->sd_diptrs;) { | |
310 | tmp_blocks = DIV_ROUND_UP(tmp_blocks, sdp->sd_inptrs); | |
311 | ind_blocks += tmp_blocks; | |
312 | } | |
313 | ||
314 | leaf_blocks = 2 + GFS2_DIR_MAX_DEPTH; | |
315 | ||
316 | sdp->sd_max_dirres = hash_blocks + ind_blocks + leaf_blocks; | |
317 | ||
318 | sdp->sd_heightsize[0] = sdp->sd_sb.sb_bsize - | |
319 | sizeof(struct gfs2_dinode); | |
320 | sdp->sd_heightsize[1] = sdp->sd_sb.sb_bsize * sdp->sd_diptrs; | |
321 | for (x = 2;; x++) { | |
322 | u64 space, d; | |
323 | u32 m; | |
324 | ||
325 | space = sdp->sd_heightsize[x - 1] * sdp->sd_inptrs; | |
326 | d = space; | |
327 | m = do_div(d, sdp->sd_inptrs); | |
328 | ||
329 | if (d != sdp->sd_heightsize[x - 1] || m) | |
330 | break; | |
331 | sdp->sd_heightsize[x] = space; | |
332 | } | |
333 | sdp->sd_max_height = x; | |
334 | sdp->sd_heightsize[x] = ~0; | |
335 | gfs2_assert(sdp, sdp->sd_max_height <= GFS2_MAX_META_HEIGHT); | |
336 | ||
337 | sdp->sd_jheightsize[0] = sdp->sd_sb.sb_bsize - | |
338 | sizeof(struct gfs2_dinode); | |
339 | sdp->sd_jheightsize[1] = sdp->sd_jbsize * sdp->sd_diptrs; | |
340 | for (x = 2;; x++) { | |
341 | u64 space, d; | |
342 | u32 m; | |
343 | ||
344 | space = sdp->sd_jheightsize[x - 1] * sdp->sd_inptrs; | |
345 | d = space; | |
346 | m = do_div(d, sdp->sd_inptrs); | |
347 | ||
348 | if (d != sdp->sd_jheightsize[x - 1] || m) | |
349 | break; | |
350 | sdp->sd_jheightsize[x] = space; | |
351 | } | |
352 | sdp->sd_max_jheight = x; | |
353 | sdp->sd_jheightsize[x] = ~0; | |
354 | gfs2_assert(sdp, sdp->sd_max_jheight <= GFS2_MAX_META_HEIGHT); | |
355 | ||
471f3db2 BM |
356 | sdp->sd_max_dents_per_leaf = (sdp->sd_sb.sb_bsize - |
357 | sizeof(struct gfs2_leaf)) / | |
358 | GFS2_MIN_DIRENT_SIZE; | |
9b8df98f SW |
359 | return 0; |
360 | } | |
361 | ||
b3b94faa DT |
362 | static int init_names(struct gfs2_sbd *sdp, int silent) |
363 | { | |
b3b94faa DT |
364 | char *proto, *table; |
365 | int error = 0; | |
366 | ||
367 | proto = sdp->sd_args.ar_lockproto; | |
368 | table = sdp->sd_args.ar_locktable; | |
369 | ||
370 | /* Try to autodetect */ | |
371 | ||
372 | if (!proto[0] || !table[0]) { | |
32e471ef | 373 | error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift, silent); |
bb8d8a6f SW |
374 | if (error) |
375 | return error; | |
3cf1e7be | 376 | |
b3b94faa | 377 | if (!proto[0]) |
3cf1e7be | 378 | proto = sdp->sd_sb.sb_lockproto; |
b3b94faa | 379 | if (!table[0]) |
3cf1e7be | 380 | table = sdp->sd_sb.sb_locktable; |
b3b94faa DT |
381 | } |
382 | ||
383 | if (!table[0]) | |
384 | table = sdp->sd_vfs->s_id; | |
385 | ||
00377d8e JD |
386 | strlcpy(sdp->sd_proto_name, proto, GFS2_FSNAME_LEN); |
387 | strlcpy(sdp->sd_table_name, table, GFS2_FSNAME_LEN); | |
b3b94faa | 388 | |
5d35e31f DC |
389 | table = sdp->sd_table_name; |
390 | while ((table = strchr(table, '/'))) | |
b35997d4 RP |
391 | *table = '_'; |
392 | ||
b3b94faa DT |
393 | return error; |
394 | } | |
395 | ||
396 | static int init_locking(struct gfs2_sbd *sdp, struct gfs2_holder *mount_gh, | |
397 | int undo) | |
398 | { | |
b3b94faa DT |
399 | int error = 0; |
400 | ||
401 | if (undo) | |
402 | goto fail_trans; | |
403 | ||
b3b94faa DT |
404 | error = gfs2_glock_nq_num(sdp, |
405 | GFS2_MOUNT_LOCK, &gfs2_nondisk_glops, | |
406 | LM_ST_EXCLUSIVE, LM_FLAG_NOEXP | GL_NOCACHE, | |
407 | mount_gh); | |
408 | if (error) { | |
409 | fs_err(sdp, "can't acquire mount glock: %d\n", error); | |
410 | goto fail; | |
411 | } | |
412 | ||
413 | error = gfs2_glock_nq_num(sdp, | |
414 | GFS2_LIVE_LOCK, &gfs2_nondisk_glops, | |
415 | LM_ST_SHARED, | |
579b78a4 | 416 | LM_FLAG_NOEXP | GL_EXACT, |
b3b94faa DT |
417 | &sdp->sd_live_gh); |
418 | if (error) { | |
419 | fs_err(sdp, "can't acquire live glock: %d\n", error); | |
420 | goto fail_mount; | |
421 | } | |
422 | ||
423 | error = gfs2_glock_get(sdp, GFS2_RENAME_LOCK, &gfs2_nondisk_glops, | |
424 | CREATE, &sdp->sd_rename_gl); | |
425 | if (error) { | |
426 | fs_err(sdp, "can't create rename glock: %d\n", error); | |
427 | goto fail_live; | |
428 | } | |
429 | ||
24972557 BM |
430 | error = gfs2_glock_get(sdp, GFS2_FREEZE_LOCK, &gfs2_freeze_glops, |
431 | CREATE, &sdp->sd_freeze_gl); | |
b3b94faa DT |
432 | if (error) { |
433 | fs_err(sdp, "can't create transaction glock: %d\n", error); | |
434 | goto fail_rename; | |
435 | } | |
b3b94faa DT |
436 | |
437 | return 0; | |
438 | ||
feaa7bba | 439 | fail_trans: |
24972557 | 440 | gfs2_glock_put(sdp->sd_freeze_gl); |
feaa7bba | 441 | fail_rename: |
b3b94faa | 442 | gfs2_glock_put(sdp->sd_rename_gl); |
feaa7bba | 443 | fail_live: |
b3b94faa | 444 | gfs2_glock_dq_uninit(&sdp->sd_live_gh); |
feaa7bba | 445 | fail_mount: |
b3b94faa | 446 | gfs2_glock_dq_uninit(mount_gh); |
feaa7bba | 447 | fail: |
b3b94faa DT |
448 | return error; |
449 | } | |
450 | ||
9b8df98f SW |
451 | static int gfs2_lookup_root(struct super_block *sb, struct dentry **dptr, |
452 | u64 no_addr, const char *name) | |
f42faf4f | 453 | { |
9b8df98f SW |
454 | struct gfs2_sbd *sdp = sb->s_fs_info; |
455 | struct dentry *dentry; | |
456 | struct inode *inode; | |
457 | ||
73b462d2 | 458 | inode = gfs2_inode_lookup(sb, DT_DIR, no_addr, 0); |
9b8df98f SW |
459 | if (IS_ERR(inode)) { |
460 | fs_err(sdp, "can't read in %s inode: %ld\n", name, PTR_ERR(inode)); | |
461 | return PTR_ERR(inode); | |
462 | } | |
48fde701 | 463 | dentry = d_make_root(inode); |
9b8df98f SW |
464 | if (!dentry) { |
465 | fs_err(sdp, "can't alloc %s dentry\n", name); | |
9b8df98f SW |
466 | return -ENOMEM; |
467 | } | |
9b8df98f SW |
468 | *dptr = dentry; |
469 | return 0; | |
f42faf4f SW |
470 | } |
471 | ||
9b8df98f | 472 | static int init_sb(struct gfs2_sbd *sdp, int silent) |
b3b94faa DT |
473 | { |
474 | struct super_block *sb = sdp->sd_vfs; | |
475 | struct gfs2_holder sb_gh; | |
dbb7cae2 | 476 | u64 no_addr; |
9b8df98f | 477 | int ret; |
b3b94faa | 478 | |
9b8df98f SW |
479 | ret = gfs2_glock_nq_num(sdp, GFS2_SB_LOCK, &gfs2_meta_glops, |
480 | LM_ST_SHARED, 0, &sb_gh); | |
481 | if (ret) { | |
482 | fs_err(sdp, "can't acquire superblock glock: %d\n", ret); | |
483 | return ret; | |
b3b94faa | 484 | } |
907b9bce | 485 | |
6bac243f | 486 | ret = gfs2_read_sb(sdp, silent); |
9b8df98f SW |
487 | if (ret) { |
488 | fs_err(sdp, "can't read superblock: %d\n", ret); | |
b3b94faa DT |
489 | goto out; |
490 | } | |
491 | ||
492 | /* Set up the buffer cache and SB for real */ | |
e1defc4f | 493 | if (sdp->sd_sb.sb_bsize < bdev_logical_block_size(sb->s_bdev)) { |
9b8df98f | 494 | ret = -EINVAL; |
b3b94faa DT |
495 | fs_err(sdp, "FS block size (%u) is too small for device " |
496 | "block size (%u)\n", | |
e1defc4f | 497 | sdp->sd_sb.sb_bsize, bdev_logical_block_size(sb->s_bdev)); |
b3b94faa DT |
498 | goto out; |
499 | } | |
500 | if (sdp->sd_sb.sb_bsize > PAGE_SIZE) { | |
9b8df98f | 501 | ret = -EINVAL; |
b3b94faa DT |
502 | fs_err(sdp, "FS block size (%u) is too big for machine " |
503 | "page size (%u)\n", | |
504 | sdp->sd_sb.sb_bsize, (unsigned int)PAGE_SIZE); | |
505 | goto out; | |
506 | } | |
b3b94faa DT |
507 | sb_set_blocksize(sb, sdp->sd_sb.sb_bsize); |
508 | ||
f42faf4f | 509 | /* Get the root inode */ |
dbb7cae2 | 510 | no_addr = sdp->sd_sb.sb_root_dir.no_addr; |
9b8df98f SW |
511 | ret = gfs2_lookup_root(sb, &sdp->sd_root_dir, no_addr, "root"); |
512 | if (ret) | |
f42faf4f | 513 | goto out; |
b3b94faa | 514 | |
9b8df98f SW |
515 | /* Get the master inode */ |
516 | no_addr = sdp->sd_sb.sb_master_dir.no_addr; | |
517 | ret = gfs2_lookup_root(sb, &sdp->sd_master_dir, no_addr, "master"); | |
518 | if (ret) { | |
519 | dput(sdp->sd_root_dir); | |
520 | goto out; | |
521 | } | |
522 | sb->s_root = dget(sdp->sd_args.ar_meta ? sdp->sd_master_dir : sdp->sd_root_dir); | |
f42faf4f | 523 | out: |
b3b94faa | 524 | gfs2_glock_dq_uninit(&sb_gh); |
9b8df98f | 525 | return ret; |
b3b94faa DT |
526 | } |
527 | ||
f057f6cd | 528 | static void gfs2_others_may_mount(struct gfs2_sbd *sdp) |
da755fdb | 529 | { |
f057f6cd SW |
530 | char *message = "FIRSTMOUNT=Done"; |
531 | char *envp[] = { message, NULL }; | |
e0c2a9aa DT |
532 | |
533 | fs_info(sdp, "first mount done, others may mount\n"); | |
534 | ||
535 | if (sdp->sd_lockstruct.ls_ops->lm_first_done) | |
536 | sdp->sd_lockstruct.ls_ops->lm_first_done(sdp); | |
537 | ||
f057f6cd | 538 | kobject_uevent_env(&sdp->sd_kobj, KOBJ_CHANGE, envp); |
da755fdb SW |
539 | } |
540 | ||
b5289681 SW |
541 | /** |
542 | * gfs2_jindex_hold - Grab a lock on the jindex | |
543 | * @sdp: The GFS2 superblock | |
544 | * @ji_gh: the holder for the jindex glock | |
545 | * | |
546 | * Returns: errno | |
547 | */ | |
548 | ||
549 | static int gfs2_jindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ji_gh) | |
550 | { | |
551 | struct gfs2_inode *dip = GFS2_I(sdp->sd_jindex); | |
552 | struct qstr name; | |
553 | char buf[20]; | |
554 | struct gfs2_jdesc *jd; | |
555 | int error; | |
556 | ||
557 | name.name = buf; | |
558 | ||
559 | mutex_lock(&sdp->sd_jindex_mutex); | |
560 | ||
561 | for (;;) { | |
562 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, ji_gh); | |
563 | if (error) | |
564 | break; | |
565 | ||
566 | name.len = sprintf(buf, "journal%u", sdp->sd_journals); | |
567 | name.hash = gfs2_disk_hash(name.name, name.len); | |
568 | ||
569 | error = gfs2_dir_check(sdp->sd_jindex, &name, NULL); | |
570 | if (error == -ENOENT) { | |
571 | error = 0; | |
572 | break; | |
573 | } | |
574 | ||
575 | gfs2_glock_dq_uninit(ji_gh); | |
576 | ||
577 | if (error) | |
578 | break; | |
579 | ||
580 | error = -ENOMEM; | |
581 | jd = kzalloc(sizeof(struct gfs2_jdesc), GFP_KERNEL); | |
582 | if (!jd) | |
583 | break; | |
584 | ||
585 | INIT_LIST_HEAD(&jd->extent_list); | |
a17d758b BP |
586 | INIT_LIST_HEAD(&jd->jd_revoke_list); |
587 | ||
6ecd7c2d | 588 | INIT_WORK(&jd->jd_work, gfs2_recover_func); |
b5289681 SW |
589 | jd->jd_inode = gfs2_lookupi(sdp->sd_jindex, &name, 1); |
590 | if (!jd->jd_inode || IS_ERR(jd->jd_inode)) { | |
591 | if (!jd->jd_inode) | |
592 | error = -ENOENT; | |
593 | else | |
594 | error = PTR_ERR(jd->jd_inode); | |
595 | kfree(jd); | |
596 | break; | |
597 | } | |
598 | ||
599 | spin_lock(&sdp->sd_jindex_spin); | |
600 | jd->jd_jid = sdp->sd_journals++; | |
601 | list_add_tail(&jd->jd_list, &sdp->sd_jindex_list); | |
602 | spin_unlock(&sdp->sd_jindex_spin); | |
603 | } | |
604 | ||
605 | mutex_unlock(&sdp->sd_jindex_mutex); | |
606 | ||
607 | return error; | |
608 | } | |
609 | ||
1d12d175 BP |
610 | /** |
611 | * check_journal_clean - Make sure a journal is clean for a spectator mount | |
612 | * @sdp: The GFS2 superblock | |
613 | * @jd: The journal descriptor | |
614 | * | |
615 | * Returns: 0 if the journal is clean or locked, else an error | |
616 | */ | |
617 | static int check_journal_clean(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd) | |
618 | { | |
619 | int error; | |
620 | struct gfs2_holder j_gh; | |
621 | struct gfs2_log_header_host head; | |
622 | struct gfs2_inode *ip; | |
623 | ||
624 | ip = GFS2_I(jd->jd_inode); | |
625 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_NOEXP | | |
626 | GL_EXACT | GL_NOCACHE, &j_gh); | |
627 | if (error) { | |
628 | fs_err(sdp, "Error locking journal for spectator mount.\n"); | |
629 | return -EPERM; | |
630 | } | |
631 | error = gfs2_jdesc_check(jd); | |
632 | if (error) { | |
633 | fs_err(sdp, "Error checking journal for spectator mount.\n"); | |
634 | goto out_unlock; | |
635 | } | |
636 | error = gfs2_find_jhead(jd, &head); | |
637 | if (error) { | |
638 | fs_err(sdp, "Error parsing journal for spectator mount.\n"); | |
639 | goto out_unlock; | |
640 | } | |
641 | if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) { | |
642 | error = -EPERM; | |
643 | fs_err(sdp, "jid=%u: Journal is dirty, so the first mounter " | |
644 | "must not be a spectator.\n", jd->jd_jid); | |
645 | } | |
646 | ||
647 | out_unlock: | |
648 | gfs2_glock_dq_uninit(&j_gh); | |
649 | return error; | |
650 | } | |
651 | ||
b3b94faa DT |
652 | static int init_journal(struct gfs2_sbd *sdp, int undo) |
653 | { | |
2b0143b5 | 654 | struct inode *master = d_inode(sdp->sd_master_dir); |
b3b94faa | 655 | struct gfs2_holder ji_gh; |
5c676f6d | 656 | struct gfs2_inode *ip; |
b3b94faa DT |
657 | int jindex = 1; |
658 | int error = 0; | |
659 | ||
660 | if (undo) { | |
661 | jindex = 0; | |
fe64d517 | 662 | goto fail_jinode_gh; |
b3b94faa DT |
663 | } |
664 | ||
9b8df98f | 665 | sdp->sd_jindex = gfs2_lookup_simple(master, "jindex"); |
c752666c | 666 | if (IS_ERR(sdp->sd_jindex)) { |
b3b94faa | 667 | fs_err(sdp, "can't lookup journal index: %d\n", error); |
c752666c | 668 | return PTR_ERR(sdp->sd_jindex); |
b3b94faa | 669 | } |
b3b94faa DT |
670 | |
671 | /* Load in the journal index special file */ | |
672 | ||
673 | error = gfs2_jindex_hold(sdp, &ji_gh); | |
674 | if (error) { | |
675 | fs_err(sdp, "can't read journal index: %d\n", error); | |
676 | goto fail; | |
677 | } | |
678 | ||
0e5a9fb0 | 679 | error = -EUSERS; |
b3b94faa DT |
680 | if (!gfs2_jindex_size(sdp)) { |
681 | fs_err(sdp, "no journals!\n"); | |
907b9bce | 682 | goto fail_jindex; |
b3b94faa DT |
683 | } |
684 | ||
685 | if (sdp->sd_args.ar_spectator) { | |
686 | sdp->sd_jdesc = gfs2_jdesc_find(sdp, 0); | |
fd041f0b | 687 | atomic_set(&sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks); |
5e687eac BM |
688 | atomic_set(&sdp->sd_log_thresh1, 2*sdp->sd_jdesc->jd_blocks/5); |
689 | atomic_set(&sdp->sd_log_thresh2, 4*sdp->sd_jdesc->jd_blocks/5); | |
b3b94faa DT |
690 | } else { |
691 | if (sdp->sd_lockstruct.ls_jid >= gfs2_jindex_size(sdp)) { | |
692 | fs_err(sdp, "can't mount journal #%u\n", | |
693 | sdp->sd_lockstruct.ls_jid); | |
694 | fs_err(sdp, "there are only %u journals (0 - %u)\n", | |
695 | gfs2_jindex_size(sdp), | |
696 | gfs2_jindex_size(sdp) - 1); | |
697 | goto fail_jindex; | |
698 | } | |
699 | sdp->sd_jdesc = gfs2_jdesc_find(sdp, sdp->sd_lockstruct.ls_jid); | |
700 | ||
feaa7bba | 701 | error = gfs2_glock_nq_num(sdp, sdp->sd_lockstruct.ls_jid, |
b3b94faa DT |
702 | &gfs2_journal_glops, |
703 | LM_ST_EXCLUSIVE, LM_FLAG_NOEXP, | |
704 | &sdp->sd_journal_gh); | |
705 | if (error) { | |
706 | fs_err(sdp, "can't acquire journal glock: %d\n", error); | |
707 | goto fail_jindex; | |
708 | } | |
709 | ||
feaa7bba SW |
710 | ip = GFS2_I(sdp->sd_jdesc->jd_inode); |
711 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, | |
75be73a8 | 712 | LM_FLAG_NOEXP | GL_EXACT | GL_NOCACHE, |
b3b94faa DT |
713 | &sdp->sd_jinode_gh); |
714 | if (error) { | |
715 | fs_err(sdp, "can't acquire journal inode glock: %d\n", | |
716 | error); | |
717 | goto fail_journal_gh; | |
718 | } | |
719 | ||
720 | error = gfs2_jdesc_check(sdp->sd_jdesc); | |
721 | if (error) { | |
722 | fs_err(sdp, "my journal (%u) is bad: %d\n", | |
723 | sdp->sd_jdesc->jd_jid, error); | |
724 | goto fail_jinode_gh; | |
725 | } | |
fd041f0b | 726 | atomic_set(&sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks); |
5e687eac BM |
727 | atomic_set(&sdp->sd_log_thresh1, 2*sdp->sd_jdesc->jd_blocks/5); |
728 | atomic_set(&sdp->sd_log_thresh2, 4*sdp->sd_jdesc->jd_blocks/5); | |
da6dd40d BP |
729 | |
730 | /* Map the extents for this journal's blocks */ | |
b50f227b | 731 | gfs2_map_journal_extents(sdp, sdp->sd_jdesc); |
b3b94faa | 732 | } |
63997775 | 733 | trace_gfs2_log_blocks(sdp, atomic_read(&sdp->sd_log_blks_free)); |
b3b94faa DT |
734 | |
735 | if (sdp->sd_lockstruct.ls_first) { | |
736 | unsigned int x; | |
737 | for (x = 0; x < sdp->sd_journals; x++) { | |
1d12d175 BP |
738 | struct gfs2_jdesc *jd = gfs2_jdesc_find(sdp, x); |
739 | ||
740 | if (sdp->sd_args.ar_spectator) { | |
741 | error = check_journal_clean(sdp, jd); | |
742 | if (error) | |
743 | goto fail_jinode_gh; | |
744 | continue; | |
745 | } | |
746 | error = gfs2_recover_journal(jd, true); | |
b3b94faa DT |
747 | if (error) { |
748 | fs_err(sdp, "error recovering journal %u: %d\n", | |
749 | x, error); | |
750 | goto fail_jinode_gh; | |
751 | } | |
752 | } | |
753 | ||
f057f6cd | 754 | gfs2_others_may_mount(sdp); |
b3b94faa | 755 | } else if (!sdp->sd_args.ar_spectator) { |
6ecd7c2d | 756 | error = gfs2_recover_journal(sdp->sd_jdesc, true); |
b3b94faa DT |
757 | if (error) { |
758 | fs_err(sdp, "error recovering my journal: %d\n", error); | |
759 | goto fail_jinode_gh; | |
760 | } | |
761 | } | |
762 | ||
086cc672 | 763 | sdp->sd_log_idle = 1; |
b3b94faa DT |
764 | set_bit(SDF_JOURNAL_CHECKED, &sdp->sd_flags); |
765 | gfs2_glock_dq_uninit(&ji_gh); | |
766 | jindex = 0; | |
2e60d768 | 767 | INIT_WORK(&sdp->sd_freeze_work, gfs2_freeze_func); |
b3b94faa DT |
768 | return 0; |
769 | ||
a91ea69f | 770 | fail_jinode_gh: |
b3b94faa DT |
771 | if (!sdp->sd_args.ar_spectator) |
772 | gfs2_glock_dq_uninit(&sdp->sd_jinode_gh); | |
a91ea69f | 773 | fail_journal_gh: |
b3b94faa DT |
774 | if (!sdp->sd_args.ar_spectator) |
775 | gfs2_glock_dq_uninit(&sdp->sd_journal_gh); | |
a91ea69f | 776 | fail_jindex: |
b3b94faa DT |
777 | gfs2_jindex_free(sdp); |
778 | if (jindex) | |
779 | gfs2_glock_dq_uninit(&ji_gh); | |
a91ea69f | 780 | fail: |
f42faf4f | 781 | iput(sdp->sd_jindex); |
b3b94faa DT |
782 | return error; |
783 | } | |
784 | ||
56aa72d0 | 785 | static struct lock_class_key gfs2_quota_imutex_key; |
b3b94faa DT |
786 | |
787 | static int init_inodes(struct gfs2_sbd *sdp, int undo) | |
788 | { | |
b3b94faa | 789 | int error = 0; |
2b0143b5 | 790 | struct inode *master = d_inode(sdp->sd_master_dir); |
b3b94faa DT |
791 | |
792 | if (undo) | |
f42faf4f SW |
793 | goto fail_qinode; |
794 | ||
f42faf4f | 795 | error = init_journal(sdp, undo); |
0e48e055 | 796 | complete_all(&sdp->sd_journal_ready); |
f42faf4f | 797 | if (error) |
9b8df98f | 798 | goto fail; |
b3b94faa | 799 | |
b3b94faa | 800 | /* Read in the master statfs inode */ |
9b8df98f | 801 | sdp->sd_statfs_inode = gfs2_lookup_simple(master, "statfs"); |
c752666c SW |
802 | if (IS_ERR(sdp->sd_statfs_inode)) { |
803 | error = PTR_ERR(sdp->sd_statfs_inode); | |
b3b94faa | 804 | fs_err(sdp, "can't read in statfs inode: %d\n", error); |
8d8291ae | 805 | goto fail_journal; |
b3b94faa DT |
806 | } |
807 | ||
808 | /* Read in the resource index inode */ | |
9b8df98f | 809 | sdp->sd_rindex = gfs2_lookup_simple(master, "rindex"); |
c752666c SW |
810 | if (IS_ERR(sdp->sd_rindex)) { |
811 | error = PTR_ERR(sdp->sd_rindex); | |
b3b94faa DT |
812 | fs_err(sdp, "can't get resource index inode: %d\n", error); |
813 | goto fail_statfs; | |
814 | } | |
cf45b752 | 815 | sdp->sd_rindex_uptodate = 0; |
b3b94faa DT |
816 | |
817 | /* Read in the quota inode */ | |
9b8df98f | 818 | sdp->sd_quota_inode = gfs2_lookup_simple(master, "quota"); |
c752666c SW |
819 | if (IS_ERR(sdp->sd_quota_inode)) { |
820 | error = PTR_ERR(sdp->sd_quota_inode); | |
b3b94faa DT |
821 | fs_err(sdp, "can't get quota file inode: %d\n", error); |
822 | goto fail_rindex; | |
823 | } | |
56aa72d0 JK |
824 | /* |
825 | * i_mutex on quota files is special. Since this inode is hidden system | |
826 | * file, we are safe to define locking ourselves. | |
827 | */ | |
9902af79 | 828 | lockdep_set_class(&sdp->sd_quota_inode->i_rwsem, |
56aa72d0 | 829 | &gfs2_quota_imutex_key); |
a365fbf3 SW |
830 | |
831 | error = gfs2_rindex_update(sdp); | |
832 | if (error) | |
833 | goto fail_qinode; | |
834 | ||
b3b94faa DT |
835 | return 0; |
836 | ||
f42faf4f SW |
837 | fail_qinode: |
838 | iput(sdp->sd_quota_inode); | |
f42faf4f | 839 | fail_rindex: |
b3b94faa | 840 | gfs2_clear_rgrpd(sdp); |
f42faf4f | 841 | iput(sdp->sd_rindex); |
f42faf4f SW |
842 | fail_statfs: |
843 | iput(sdp->sd_statfs_inode); | |
f42faf4f SW |
844 | fail_journal: |
845 | init_journal(sdp, UNDO); | |
f42faf4f | 846 | fail: |
b3b94faa DT |
847 | return error; |
848 | } | |
849 | ||
850 | static int init_per_node(struct gfs2_sbd *sdp, int undo) | |
851 | { | |
f42faf4f | 852 | struct inode *pn = NULL; |
b3b94faa DT |
853 | char buf[30]; |
854 | int error = 0; | |
5c676f6d | 855 | struct gfs2_inode *ip; |
2b0143b5 | 856 | struct inode *master = d_inode(sdp->sd_master_dir); |
b3b94faa DT |
857 | |
858 | if (sdp->sd_args.ar_spectator) | |
859 | return 0; | |
860 | ||
861 | if (undo) | |
862 | goto fail_qc_gh; | |
863 | ||
9b8df98f | 864 | pn = gfs2_lookup_simple(master, "per_node"); |
c752666c SW |
865 | if (IS_ERR(pn)) { |
866 | error = PTR_ERR(pn); | |
b3b94faa DT |
867 | fs_err(sdp, "can't find per_node directory: %d\n", error); |
868 | return error; | |
869 | } | |
870 | ||
b3b94faa | 871 | sprintf(buf, "statfs_change%u", sdp->sd_jdesc->jd_jid); |
c752666c SW |
872 | sdp->sd_sc_inode = gfs2_lookup_simple(pn, buf); |
873 | if (IS_ERR(sdp->sd_sc_inode)) { | |
874 | error = PTR_ERR(sdp->sd_sc_inode); | |
b3b94faa | 875 | fs_err(sdp, "can't find local \"sc\" file: %d\n", error); |
8d8291ae | 876 | goto fail; |
b3b94faa DT |
877 | } |
878 | ||
b3b94faa | 879 | sprintf(buf, "quota_change%u", sdp->sd_jdesc->jd_jid); |
c752666c SW |
880 | sdp->sd_qc_inode = gfs2_lookup_simple(pn, buf); |
881 | if (IS_ERR(sdp->sd_qc_inode)) { | |
882 | error = PTR_ERR(sdp->sd_qc_inode); | |
b3b94faa DT |
883 | fs_err(sdp, "can't find local \"qc\" file: %d\n", error); |
884 | goto fail_ut_i; | |
885 | } | |
886 | ||
f42faf4f | 887 | iput(pn); |
b3b94faa DT |
888 | pn = NULL; |
889 | ||
feaa7bba | 890 | ip = GFS2_I(sdp->sd_sc_inode); |
8d8291ae | 891 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, |
b3b94faa DT |
892 | &sdp->sd_sc_gh); |
893 | if (error) { | |
894 | fs_err(sdp, "can't lock local \"sc\" file: %d\n", error); | |
8d8291ae | 895 | goto fail_qc_i; |
b3b94faa DT |
896 | } |
897 | ||
feaa7bba | 898 | ip = GFS2_I(sdp->sd_qc_inode); |
8d8291ae | 899 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, |
b3b94faa DT |
900 | &sdp->sd_qc_gh); |
901 | if (error) { | |
902 | fs_err(sdp, "can't lock local \"qc\" file: %d\n", error); | |
903 | goto fail_ut_gh; | |
904 | } | |
905 | ||
906 | return 0; | |
907 | ||
a91ea69f | 908 | fail_qc_gh: |
b3b94faa | 909 | gfs2_glock_dq_uninit(&sdp->sd_qc_gh); |
a91ea69f | 910 | fail_ut_gh: |
b3b94faa | 911 | gfs2_glock_dq_uninit(&sdp->sd_sc_gh); |
a91ea69f | 912 | fail_qc_i: |
f42faf4f | 913 | iput(sdp->sd_qc_inode); |
a91ea69f | 914 | fail_ut_i: |
f42faf4f | 915 | iput(sdp->sd_sc_inode); |
a91ea69f | 916 | fail: |
6fde2242 | 917 | iput(pn); |
b3b94faa DT |
918 | return error; |
919 | } | |
920 | ||
f057f6cd SW |
921 | static const match_table_t nolock_tokens = { |
922 | { Opt_jid, "jid=%d\n", }, | |
923 | { Opt_err, NULL }, | |
924 | }; | |
925 | ||
926 | static const struct lm_lockops nolock_ops = { | |
927 | .lm_proto_name = "lock_nolock", | |
fc0e38da | 928 | .lm_put_lock = gfs2_glock_free, |
f057f6cd SW |
929 | .lm_tokens = &nolock_tokens, |
930 | }; | |
931 | ||
da755fdb SW |
932 | /** |
933 | * gfs2_lm_mount - mount a locking protocol | |
934 | * @sdp: the filesystem | |
3ad2f3fb | 935 | * @args: mount arguments |
da755fdb SW |
936 | * @silent: if 1, don't complain if the FS isn't a GFS2 fs |
937 | * | |
938 | * Returns: errno | |
939 | */ | |
940 | ||
941 | static int gfs2_lm_mount(struct gfs2_sbd *sdp, int silent) | |
942 | { | |
f057f6cd SW |
943 | const struct lm_lockops *lm; |
944 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; | |
945 | struct gfs2_args *args = &sdp->sd_args; | |
946 | const char *proto = sdp->sd_proto_name; | |
947 | const char *table = sdp->sd_table_name; | |
f057f6cd SW |
948 | char *o, *options; |
949 | int ret; | |
da755fdb | 950 | |
f057f6cd SW |
951 | if (!strcmp("lock_nolock", proto)) { |
952 | lm = &nolock_ops; | |
953 | sdp->sd_args.ar_localflocks = 1; | |
f057f6cd SW |
954 | #ifdef CONFIG_GFS2_FS_LOCKING_DLM |
955 | } else if (!strcmp("lock_dlm", proto)) { | |
956 | lm = &gfs2_dlm_ops; | |
957 | #endif | |
958 | } else { | |
d77d1b58 | 959 | pr_info("can't find protocol %s\n", proto); |
f057f6cd SW |
960 | return -ENOENT; |
961 | } | |
da755fdb SW |
962 | |
963 | fs_info(sdp, "Trying to join cluster \"%s\", \"%s\"\n", proto, table); | |
964 | ||
f057f6cd SW |
965 | ls->ls_ops = lm; |
966 | ls->ls_first = 1; | |
da755fdb | 967 | |
f057f6cd SW |
968 | for (options = args->ar_hostdata; (o = strsep(&options, ":")); ) { |
969 | substring_t tmp[MAX_OPT_ARGS]; | |
970 | int token, option; | |
971 | ||
972 | if (!o || !*o) | |
973 | continue; | |
974 | ||
975 | token = match_token(o, *lm->lm_tokens, tmp); | |
976 | switch (token) { | |
977 | case Opt_jid: | |
978 | ret = match_int(&tmp[0], &option); | |
979 | if (ret || option < 0) | |
980 | goto hostdata_error; | |
ba6e9364 SW |
981 | if (test_and_clear_bit(SDF_NOJOURNALID, &sdp->sd_flags)) |
982 | ls->ls_jid = option; | |
f057f6cd SW |
983 | break; |
984 | case Opt_id: | |
4875647a | 985 | case Opt_nodir: |
2b88f7c5 | 986 | /* Obsolete, but left for backward compat purposes */ |
f057f6cd SW |
987 | break; |
988 | case Opt_first: | |
989 | ret = match_int(&tmp[0], &option); | |
990 | if (ret || (option != 0 && option != 1)) | |
991 | goto hostdata_error; | |
992 | ls->ls_first = option; | |
993 | break; | |
f057f6cd SW |
994 | case Opt_err: |
995 | default: | |
996 | hostdata_error: | |
997 | fs_info(sdp, "unknown hostdata (%s)\n", o); | |
998 | return -EINVAL; | |
999 | } | |
da755fdb SW |
1000 | } |
1001 | ||
f057f6cd SW |
1002 | if (lm->lm_mount == NULL) { |
1003 | fs_info(sdp, "Now mounting FS...\n"); | |
19237039 | 1004 | complete_all(&sdp->sd_locking_init); |
f057f6cd | 1005 | return 0; |
da755fdb | 1006 | } |
e0c2a9aa | 1007 | ret = lm->lm_mount(sdp, table); |
f057f6cd SW |
1008 | if (ret == 0) |
1009 | fs_info(sdp, "Joined cluster. Now mounting FS...\n"); | |
19237039 | 1010 | complete_all(&sdp->sd_locking_init); |
f057f6cd | 1011 | return ret; |
da755fdb SW |
1012 | } |
1013 | ||
1014 | void gfs2_lm_unmount(struct gfs2_sbd *sdp) | |
1015 | { | |
f057f6cd SW |
1016 | const struct lm_lockops *lm = sdp->sd_lockstruct.ls_ops; |
1017 | if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) && | |
1018 | lm->lm_unmount) | |
1019 | lm->lm_unmount(sdp); | |
da755fdb | 1020 | } |
b3b94faa | 1021 | |
ba6e9364 SW |
1022 | static int wait_on_journal(struct gfs2_sbd *sdp) |
1023 | { | |
ba6e9364 SW |
1024 | if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL) |
1025 | return 0; | |
1026 | ||
74316201 N |
1027 | return wait_on_bit(&sdp->sd_flags, SDF_NOJOURNALID, TASK_INTERRUPTIBLE) |
1028 | ? -EINTR : 0; | |
ba6e9364 SW |
1029 | } |
1030 | ||
8633ecfa SW |
1031 | void gfs2_online_uevent(struct gfs2_sbd *sdp) |
1032 | { | |
1033 | struct super_block *sb = sdp->sd_vfs; | |
1034 | char ro[20]; | |
1035 | char spectator[20]; | |
1036 | char *envp[] = { ro, spectator, NULL }; | |
1037 | sprintf(ro, "RDONLY=%d", (sb->s_flags & MS_RDONLY) ? 1 : 0); | |
1038 | sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0); | |
1039 | kobject_uevent_env(&sdp->sd_kobj, KOBJ_ONLINE, envp); | |
1040 | } | |
1041 | ||
b3b94faa DT |
1042 | /** |
1043 | * fill_super - Read in superblock | |
1044 | * @sb: The VFS superblock | |
1045 | * @data: Mount options | |
1046 | * @silent: Don't complain if it's not a GFS2 filesystem | |
1047 | * | |
1048 | * Returns: errno | |
1049 | */ | |
1050 | ||
f55073ff | 1051 | static int fill_super(struct super_block *sb, struct gfs2_args *args, int silent) |
b3b94faa DT |
1052 | { |
1053 | struct gfs2_sbd *sdp; | |
1054 | struct gfs2_holder mount_gh; | |
1055 | int error; | |
1056 | ||
1057 | sdp = init_sbd(sb); | |
1058 | if (!sdp) { | |
d77d1b58 | 1059 | pr_warn("can't alloc struct gfs2_sbd\n"); |
b3b94faa DT |
1060 | return -ENOMEM; |
1061 | } | |
f55073ff | 1062 | sdp->sd_args = *args; |
b3b94faa | 1063 | |
fe64d517 | 1064 | if (sdp->sd_args.ar_spectator) { |
6f04c1c7 | 1065 | sb->s_flags |= MS_RDONLY; |
e8ca5cc5 | 1066 | set_bit(SDF_RORECOVERY, &sdp->sd_flags); |
fe64d517 | 1067 | } |
6f04c1c7 SW |
1068 | if (sdp->sd_args.ar_posix_acl) |
1069 | sb->s_flags |= MS_POSIXACL; | |
f25934c5 CH |
1070 | if (sdp->sd_args.ar_nobarrier) |
1071 | set_bit(SDF_NOBARRIERS, &sdp->sd_flags); | |
6f04c1c7 | 1072 | |
9964afbb | 1073 | sb->s_flags |= MS_NOSEC; |
719ee344 SW |
1074 | sb->s_magic = GFS2_MAGIC; |
1075 | sb->s_op = &gfs2_super_ops; | |
41ced6dc | 1076 | sb->s_d_op = &gfs2_dops; |
719ee344 | 1077 | sb->s_export_op = &gfs2_export_ops; |
40b78a32 | 1078 | sb->s_xattr = gfs2_xattr_handlers; |
cc632e7f | 1079 | sb->s_qcop = &gfs2_quotactl_ops; |
de3b08d3 | 1080 | sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; |
cc632e7f | 1081 | sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; |
719ee344 SW |
1082 | sb->s_time_gran = 1; |
1083 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
419c93e0 SW |
1084 | |
1085 | /* Set up the buffer cache and fill in some fake block size values | |
1086 | to allow us to read-in the on-disk superblock. */ | |
1087 | sdp->sd_sb.sb_bsize = sb_min_blocksize(sb, GFS2_BASIC_BLOCK); | |
1088 | sdp->sd_sb.sb_bsize_shift = sb->s_blocksize_bits; | |
1089 | sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift - | |
1090 | GFS2_BASIC_BLOCK_SHIFT; | |
1091 | sdp->sd_fsb2bb = 1 << sdp->sd_fsb2bb_shift; | |
b3b94faa | 1092 | |
5e687eac | 1093 | sdp->sd_tune.gt_logd_secs = sdp->sd_args.ar_commit; |
3d3c10f2 BM |
1094 | sdp->sd_tune.gt_quota_quantum = sdp->sd_args.ar_quota_quantum; |
1095 | if (sdp->sd_args.ar_statfs_quantum) { | |
1096 | sdp->sd_tune.gt_statfs_slow = 0; | |
1097 | sdp->sd_tune.gt_statfs_quantum = sdp->sd_args.ar_statfs_quantum; | |
32e471ef | 1098 | } else { |
3d3c10f2 BM |
1099 | sdp->sd_tune.gt_statfs_slow = 1; |
1100 | sdp->sd_tune.gt_statfs_quantum = 30; | |
1101 | } | |
48c2b613 | 1102 | |
b3b94faa | 1103 | error = init_names(sdp, silent); |
0d515210 BP |
1104 | if (error) { |
1105 | /* In this case, we haven't initialized sysfs, so we have to | |
1106 | manually free the sdp. */ | |
1107 | free_percpu(sdp->sd_lkstats); | |
1108 | kfree(sdp); | |
1109 | sb->s_fs_info = NULL; | |
1110 | return error; | |
1111 | } | |
b3b94faa | 1112 | |
e0c2a9aa DT |
1113 | snprintf(sdp->sd_fsname, GFS2_FSNAME_LEN, "%s", sdp->sd_table_name); |
1114 | ||
b3b94faa | 1115 | error = gfs2_sys_fs_add(sdp); |
0d515210 BP |
1116 | /* |
1117 | * If we hit an error here, gfs2_sys_fs_add will have called function | |
1118 | * kobject_put which causes the sysfs usage count to go to zero, which | |
1119 | * causes sysfs to call function gfs2_sbd_release, which frees sdp. | |
1120 | * Subsequent error paths here will call gfs2_sys_fs_del, which also | |
1121 | * kobject_put to free sdp. | |
1122 | */ | |
b3b94faa | 1123 | if (error) |
0d515210 BP |
1124 | return error; |
1125 | ||
1126 | gfs2_create_debugfs_file(sdp); | |
b3b94faa DT |
1127 | |
1128 | error = gfs2_lm_mount(sdp, silent); | |
1129 | if (error) | |
0d515210 | 1130 | goto fail_debug; |
b3b94faa DT |
1131 | |
1132 | error = init_locking(sdp, &mount_gh, DO); | |
1133 | if (error) | |
1134 | goto fail_lm; | |
1135 | ||
9b8df98f | 1136 | error = init_sb(sdp, silent); |
b3b94faa DT |
1137 | if (error) |
1138 | goto fail_locking; | |
b3b94faa | 1139 | |
ba6e9364 SW |
1140 | error = wait_on_journal(sdp); |
1141 | if (error) | |
1142 | goto fail_sb; | |
1143 | ||
feb47ca9 SW |
1144 | /* |
1145 | * If user space has failed to join the cluster or some similar | |
1146 | * failure has occurred, then the journal id will contain a | |
1147 | * negative (error) number. This will then be returned to the | |
1148 | * caller (of the mount syscall). We do this even for spectator | |
1149 | * mounts (which just write a jid of 0 to indicate "ok" even though | |
1150 | * the jid is unused in the spectator case) | |
1151 | */ | |
1152 | if (sdp->sd_lockstruct.ls_jid < 0) { | |
1153 | error = sdp->sd_lockstruct.ls_jid; | |
1154 | sdp->sd_lockstruct.ls_jid = 0; | |
1155 | goto fail_sb; | |
1156 | } | |
1157 | ||
e0c2a9aa DT |
1158 | if (sdp->sd_args.ar_spectator) |
1159 | snprintf(sdp->sd_fsname, GFS2_FSNAME_LEN, "%s.s", | |
1160 | sdp->sd_table_name); | |
1161 | else | |
1162 | snprintf(sdp->sd_fsname, GFS2_FSNAME_LEN, "%s.%u", | |
1163 | sdp->sd_table_name, sdp->sd_lockstruct.ls_jid); | |
1164 | ||
b3b94faa DT |
1165 | error = init_inodes(sdp, DO); |
1166 | if (error) | |
f42faf4f | 1167 | goto fail_sb; |
b3b94faa DT |
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 | ||
b3b94faa DT |
1179 | if (!(sb->s_flags & MS_RDONLY)) { |
1180 | error = gfs2_make_fs_rw(sdp); | |
1181 | if (error) { | |
1182 | fs_err(sdp, "can't make FS RW: %d\n", error); | |
8ad151c2 | 1183 | goto fail_per_node; |
b3b94faa DT |
1184 | } |
1185 | } | |
1186 | ||
1187 | gfs2_glock_dq_uninit(&mount_gh); | |
8633ecfa | 1188 | gfs2_online_uevent(sdp); |
b3b94faa DT |
1189 | return 0; |
1190 | ||
a91ea69f | 1191 | fail_per_node: |
b3b94faa | 1192 | init_per_node(sdp, UNDO); |
a91ea69f | 1193 | fail_inodes: |
b3b94faa | 1194 | init_inodes(sdp, UNDO); |
a91ea69f | 1195 | fail_sb: |
9b8df98f SW |
1196 | if (sdp->sd_root_dir) |
1197 | dput(sdp->sd_root_dir); | |
1198 | if (sdp->sd_master_dir) | |
1199 | dput(sdp->sd_master_dir); | |
e7c8707e SW |
1200 | if (sb->s_root) |
1201 | dput(sb->s_root); | |
9b8df98f | 1202 | sb->s_root = NULL; |
a91ea69f | 1203 | fail_locking: |
b3b94faa | 1204 | init_locking(sdp, &mount_gh, UNDO); |
a91ea69f | 1205 | fail_lm: |
0e48e055 | 1206 | complete_all(&sdp->sd_journal_ready); |
fefc03bf | 1207 | gfs2_gl_hash_clear(sdp); |
b3b94faa | 1208 | gfs2_lm_unmount(sdp); |
0d515210 | 1209 | fail_debug: |
5f882096 | 1210 | gfs2_delete_debugfs_file(sdp); |
a245769f | 1211 | free_percpu(sdp->sd_lkstats); |
0d515210 BP |
1212 | /* gfs2_sys_fs_del must be the last thing we do, since it causes |
1213 | * sysfs to call function gfs2_sbd_release, which frees sdp. */ | |
1214 | gfs2_sys_fs_del(sdp); | |
5c676f6d | 1215 | sb->s_fs_info = NULL; |
b3b94faa DT |
1216 | return error; |
1217 | } | |
1218 | ||
f55073ff | 1219 | static int set_gfs2_super(struct super_block *s, void *data) |
b3b94faa | 1220 | { |
f55073ff SW |
1221 | s->s_bdev = data; |
1222 | s->s_dev = s->s_bdev->bd_dev; | |
1223 | ||
1224 | /* | |
1225 | * We set the bdi here to the queue backing, file systems can | |
1226 | * overwrite this in ->fill_super() | |
1227 | */ | |
1228 | s->s_bdi = &bdev_get_queue(s->s_bdev)->backing_dev_info; | |
1229 | return 0; | |
86384605 AD |
1230 | } |
1231 | ||
f55073ff | 1232 | static int test_gfs2_super(struct super_block *s, void *ptr) |
f6d03139 SW |
1233 | { |
1234 | struct block_device *bdev = ptr; | |
1235 | return (bdev == s->s_bdev); | |
1236 | } | |
1237 | ||
f55073ff | 1238 | /** |
8bcbbf00 | 1239 | * gfs2_mount - Get the GFS2 superblock |
f55073ff SW |
1240 | * @fs_type: The GFS2 filesystem type |
1241 | * @flags: Mount flags | |
1242 | * @dev_name: The name of the device | |
1243 | * @data: The mount arguments | |
f55073ff SW |
1244 | * |
1245 | * Q. Why not use get_sb_bdev() ? | |
1246 | * A. We need to select one of two root directories to mount, independent | |
1247 | * of whether this is the initial, or subsequent, mount of this sb | |
1248 | * | |
1249 | * Returns: 0 or -ve on error | |
1250 | */ | |
1251 | ||
8bcbbf00 AV |
1252 | static struct dentry *gfs2_mount(struct file_system_type *fs_type, int flags, |
1253 | const char *dev_name, void *data) | |
f55073ff SW |
1254 | { |
1255 | struct block_device *bdev; | |
1256 | struct super_block *s; | |
d4d77629 | 1257 | fmode_t mode = FMODE_READ | FMODE_EXCL; |
f55073ff SW |
1258 | int error; |
1259 | struct gfs2_args args; | |
1260 | struct gfs2_sbd *sdp; | |
1261 | ||
1262 | if (!(flags & MS_RDONLY)) | |
1263 | mode |= FMODE_WRITE; | |
1264 | ||
d4d77629 | 1265 | bdev = blkdev_get_by_path(dev_name, mode, fs_type); |
f55073ff | 1266 | if (IS_ERR(bdev)) |
8bcbbf00 | 1267 | return ERR_CAST(bdev); |
f55073ff SW |
1268 | |
1269 | /* | |
1270 | * once the super is inserted into the list by sget, s_umount | |
1271 | * will protect the lockfs code from trying to start a snapshot | |
1272 | * while we are mounting | |
1273 | */ | |
1274 | mutex_lock(&bdev->bd_fsfreeze_mutex); | |
1275 | if (bdev->bd_fsfreeze_count > 0) { | |
1276 | mutex_unlock(&bdev->bd_fsfreeze_mutex); | |
1277 | error = -EBUSY; | |
1278 | goto error_bdev; | |
1279 | } | |
9249e17f | 1280 | s = sget(fs_type, test_gfs2_super, set_gfs2_super, flags, bdev); |
f55073ff SW |
1281 | mutex_unlock(&bdev->bd_fsfreeze_mutex); |
1282 | error = PTR_ERR(s); | |
1283 | if (IS_ERR(s)) | |
1284 | goto error_bdev; | |
1285 | ||
dfe5b9ad SW |
1286 | if (s->s_root) { |
1287 | /* | |
1288 | * s_umount nests inside bd_mutex during | |
1289 | * __invalidate_device(). blkdev_put() acquires | |
1290 | * bd_mutex and can't be called under s_umount. Drop | |
1291 | * s_umount temporarily. This is safe as we're | |
1292 | * holding an active reference. | |
1293 | */ | |
1294 | up_write(&s->s_umount); | |
d4d77629 | 1295 | blkdev_put(bdev, mode); |
dfe5b9ad | 1296 | down_write(&s->s_umount); |
6de20eb0 AP |
1297 | } else { |
1298 | /* s_mode must be set before deactivate_locked_super calls */ | |
1299 | s->s_mode = mode; | |
dfe5b9ad | 1300 | } |
8bcbbf00 | 1301 | |
f55073ff SW |
1302 | memset(&args, 0, sizeof(args)); |
1303 | args.ar_quota = GFS2_QUOTA_DEFAULT; | |
1304 | args.ar_data = GFS2_DATA_DEFAULT; | |
5e687eac | 1305 | args.ar_commit = 30; |
3d3c10f2 BM |
1306 | args.ar_statfs_quantum = 30; |
1307 | args.ar_quota_quantum = 60; | |
f55073ff SW |
1308 | args.ar_errors = GFS2_ERRORS_DEFAULT; |
1309 | ||
1310 | error = gfs2_mount_args(&args, data); | |
1311 | if (error) { | |
d77d1b58 | 1312 | pr_warn("can't parse mount arguments\n"); |
8bcbbf00 | 1313 | goto error_super; |
f55073ff SW |
1314 | } |
1315 | ||
1316 | if (s->s_root) { | |
1317 | error = -EBUSY; | |
1318 | if ((flags ^ s->s_flags) & MS_RDONLY) | |
1319 | goto error_super; | |
f55073ff | 1320 | } else { |
a1c6f057 | 1321 | snprintf(s->s_id, sizeof(s->s_id), "%pg", bdev); |
f55073ff SW |
1322 | sb_set_blocksize(s, block_size(bdev)); |
1323 | error = fill_super(s, &args, flags & MS_SILENT ? 1 : 0); | |
8bcbbf00 AV |
1324 | if (error) |
1325 | goto error_super; | |
f55073ff SW |
1326 | s->s_flags |= MS_ACTIVE; |
1327 | bdev->bd_super = s; | |
1328 | } | |
1329 | ||
1330 | sdp = s->s_fs_info; | |
f55073ff | 1331 | if (args.ar_meta) |
8bcbbf00 | 1332 | return dget(sdp->sd_master_dir); |
f55073ff | 1333 | else |
8bcbbf00 | 1334 | return dget(sdp->sd_root_dir); |
f55073ff SW |
1335 | |
1336 | error_super: | |
1337 | deactivate_locked_super(s); | |
8bcbbf00 | 1338 | return ERR_PTR(error); |
f55073ff | 1339 | error_bdev: |
d4d77629 | 1340 | blkdev_put(bdev, mode); |
8bcbbf00 | 1341 | return ERR_PTR(error); |
f55073ff SW |
1342 | } |
1343 | ||
f6d03139 SW |
1344 | static int set_meta_super(struct super_block *s, void *ptr) |
1345 | { | |
1346 | return -EINVAL; | |
1347 | } | |
1348 | ||
8bcbbf00 AV |
1349 | static struct dentry *gfs2_mount_meta(struct file_system_type *fs_type, |
1350 | int flags, const char *dev_name, void *data) | |
86384605 | 1351 | { |
f6d03139 | 1352 | struct super_block *s; |
003dec89 | 1353 | struct gfs2_sbd *sdp; |
e24977d4 | 1354 | struct path path; |
86384605 | 1355 | int error; |
907b9bce | 1356 | |
e24977d4 | 1357 | error = kern_path(dev_name, LOOKUP_FOLLOW, &path); |
86384605 | 1358 | if (error) { |
d77d1b58 JP |
1359 | pr_warn("path_lookup on %s returned error %d\n", |
1360 | dev_name, error); | |
8bcbbf00 | 1361 | return ERR_PTR(error); |
86384605 | 1362 | } |
9249e17f | 1363 | s = sget(&gfs2_fs_type, test_gfs2_super, set_meta_super, flags, |
fc64005c | 1364 | path.dentry->d_sb->s_bdev); |
e24977d4 | 1365 | path_put(&path); |
f6d03139 | 1366 | if (IS_ERR(s)) { |
d77d1b58 | 1367 | pr_warn("gfs2 mount does not exist\n"); |
8bcbbf00 | 1368 | return ERR_CAST(s); |
86384605 | 1369 | } |
f55073ff SW |
1370 | if ((flags ^ s->s_flags) & MS_RDONLY) { |
1371 | deactivate_locked_super(s); | |
8bcbbf00 | 1372 | return ERR_PTR(-EBUSY); |
f55073ff | 1373 | } |
f6d03139 | 1374 | sdp = s->s_fs_info; |
8bcbbf00 | 1375 | return dget(sdp->sd_master_dir); |
b3b94faa DT |
1376 | } |
1377 | ||
419c93e0 | 1378 | static void gfs2_kill_sb(struct super_block *sb) |
86384605 AD |
1379 | { |
1380 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
88a19ad0 SW |
1381 | |
1382 | if (sdp == NULL) { | |
1383 | kill_block_super(sb); | |
1384 | return; | |
3af165ac | 1385 | } |
88a19ad0 | 1386 | |
24972557 | 1387 | gfs2_log_flush(sdp, NULL, SYNC_FLUSH); |
88a19ad0 SW |
1388 | dput(sdp->sd_root_dir); |
1389 | dput(sdp->sd_master_dir); | |
1390 | sdp->sd_root_dir = NULL; | |
1391 | sdp->sd_master_dir = NULL; | |
fefc03bf | 1392 | shrink_dcache_sb(sb); |
88a19ad0 | 1393 | gfs2_delete_debugfs_file(sdp); |
a245769f | 1394 | free_percpu(sdp->sd_lkstats); |
0d515210 | 1395 | kill_block_super(sb); |
86384605 AD |
1396 | } |
1397 | ||
b3b94faa DT |
1398 | struct file_system_type gfs2_fs_type = { |
1399 | .name = "gfs2", | |
1400 | .fs_flags = FS_REQUIRES_DEV, | |
8bcbbf00 | 1401 | .mount = gfs2_mount, |
419c93e0 SW |
1402 | .kill_sb = gfs2_kill_sb, |
1403 | .owner = THIS_MODULE, | |
1404 | }; | |
7f78e035 | 1405 | MODULE_ALIAS_FS("gfs2"); |
419c93e0 SW |
1406 | |
1407 | struct file_system_type gfs2meta_fs_type = { | |
1408 | .name = "gfs2meta", | |
1409 | .fs_flags = FS_REQUIRES_DEV, | |
8bcbbf00 | 1410 | .mount = gfs2_mount_meta, |
b3b94faa DT |
1411 | .owner = THIS_MODULE, |
1412 | }; | |
7f78e035 | 1413 | MODULE_ALIAS_FS("gfs2meta"); |