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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 | ||
10 | #include <linux/sched.h> | |
11 | #include <linux/slab.h> | |
12 | #include <linux/spinlock.h> | |
13 | #include <linux/completion.h> | |
14 | #include <linux/buffer_head.h> | |
b3b94faa DT |
15 | #include <linux/blkdev.h> |
16 | #include <linux/kthread.h> | |
afeacc8c | 17 | #include <linux/export.h> |
86384605 AD |
18 | #include <linux/namei.h> |
19 | #include <linux/mount.h> | |
5c676f6d | 20 | #include <linux/gfs2_ondisk.h> |
cc632e7f | 21 | #include <linux/quotaops.h> |
56aa72d0 | 22 | #include <linux/lockdep.h> |
7f78e035 | 23 | #include <linux/module.h> |
b3b94faa DT |
24 | |
25 | #include "gfs2.h" | |
5c676f6d | 26 | #include "incore.h" |
da6dd40d | 27 | #include "bmap.h" |
b3b94faa DT |
28 | #include "glock.h" |
29 | #include "glops.h" | |
30 | #include "inode.h" | |
b3b94faa DT |
31 | #include "recovery.h" |
32 | #include "rgrp.h" | |
33 | #include "super.h" | |
b3b94faa | 34 | #include "sys.h" |
5c676f6d | 35 | #include "util.h" |
bb3b0e3d | 36 | #include "log.h" |
9ac1b4d9 | 37 | #include "quota.h" |
b5289681 | 38 | #include "dir.h" |
70d4ee94 | 39 | #include "meta_io.h" |
63997775 | 40 | #include "trace_gfs2.h" |
b3b94faa DT |
41 | |
42 | #define DO 0 | |
43 | #define UNDO 1 | |
44 | ||
9b8df98f SW |
45 | /** |
46 | * gfs2_tune_init - Fill a gfs2_tune structure with default values | |
47 | * @gt: tune | |
48 | * | |
49 | */ | |
50 | ||
51 | static void gfs2_tune_init(struct gfs2_tune *gt) | |
52 | { | |
53 | spin_lock_init(>->gt_spin); | |
54 | ||
9b8df98f SW |
55 | gt->gt_quota_warn_period = 10; |
56 | gt->gt_quota_scale_num = 1; | |
57 | gt->gt_quota_scale_den = 1; | |
9b8df98f SW |
58 | gt->gt_new_files_jdata = 0; |
59 | gt->gt_max_readahead = 1 << 18; | |
9b8df98f | 60 | gt->gt_complain_secs = 10; |
9b8df98f SW |
61 | } |
62 | ||
b3b94faa DT |
63 | static struct gfs2_sbd *init_sbd(struct super_block *sb) |
64 | { | |
65 | struct gfs2_sbd *sdp; | |
70d4ee94 | 66 | struct address_space *mapping; |
b3b94faa | 67 | |
85d1da67 | 68 | sdp = kzalloc(sizeof(struct gfs2_sbd), GFP_KERNEL); |
b3b94faa DT |
69 | if (!sdp) |
70 | return NULL; | |
71 | ||
5c676f6d | 72 | sb->s_fs_info = sdp; |
b3b94faa | 73 | sdp->sd_vfs = sb; |
a245769f SW |
74 | sdp->sd_lkstats = alloc_percpu(struct gfs2_pcpu_lkstats); |
75 | if (!sdp->sd_lkstats) { | |
76 | kfree(sdp); | |
77 | return NULL; | |
78 | } | |
79 | ||
ba6e9364 | 80 | set_bit(SDF_NOJOURNALID, &sdp->sd_flags); |
b3b94faa DT |
81 | gfs2_tune_init(&sdp->sd_tune); |
82 | ||
e402746a SW |
83 | init_waitqueue_head(&sdp->sd_glock_wait); |
84 | atomic_set(&sdp->sd_glock_disposal, 0); | |
3942ae53 | 85 | init_completion(&sdp->sd_locking_init); |
fd95e81c | 86 | init_completion(&sdp->sd_wdack); |
b3b94faa | 87 | spin_lock_init(&sdp->sd_statfs_spin); |
b3b94faa DT |
88 | |
89 | spin_lock_init(&sdp->sd_rindex_spin); | |
7c9ca621 | 90 | sdp->sd_rindex_tree.rb_node = NULL; |
b3b94faa DT |
91 | |
92 | INIT_LIST_HEAD(&sdp->sd_jindex_list); | |
93 | spin_lock_init(&sdp->sd_jindex_spin); | |
f55ab26a | 94 | mutex_init(&sdp->sd_jindex_mutex); |
b3b94faa | 95 | |
b3b94faa | 96 | INIT_LIST_HEAD(&sdp->sd_quota_list); |
f55ab26a | 97 | mutex_init(&sdp->sd_quota_mutex); |
e46c772d | 98 | mutex_init(&sdp->sd_quota_sync_mutex); |
37b2c837 | 99 | init_waitqueue_head(&sdp->sd_quota_wait); |
813e0c46 SW |
100 | INIT_LIST_HEAD(&sdp->sd_trunc_list); |
101 | spin_lock_init(&sdp->sd_trunc_lock); | |
b3b94faa | 102 | |
70d4ee94 SW |
103 | mapping = &sdp->sd_aspace; |
104 | ||
39849d69 | 105 | address_space_init_once(mapping); |
70d4ee94 SW |
106 | mapping->a_ops = &gfs2_meta_aops; |
107 | mapping->host = sb->s_bdev->bd_inode; | |
108 | mapping->flags = 0; | |
109 | mapping_set_gfp_mask(mapping, GFP_NOFS); | |
110 | mapping->private_data = NULL; | |
111 | mapping->backing_dev_info = sb->s_bdi; | |
112 | mapping->writeback_index = 0; | |
113 | ||
b3b94faa | 114 | spin_lock_init(&sdp->sd_log_lock); |
5e687eac | 115 | atomic_set(&sdp->sd_log_pinned, 0); |
b3b94faa DT |
116 | INIT_LIST_HEAD(&sdp->sd_log_le_buf); |
117 | INIT_LIST_HEAD(&sdp->sd_log_le_revoke); | |
b3b94faa | 118 | INIT_LIST_HEAD(&sdp->sd_log_le_databuf); |
d7b616e2 | 119 | INIT_LIST_HEAD(&sdp->sd_log_le_ordered); |
45138990 | 120 | spin_lock_init(&sdp->sd_ordered_lock); |
b3b94faa | 121 | |
5e687eac BM |
122 | init_waitqueue_head(&sdp->sd_log_waitq); |
123 | init_waitqueue_head(&sdp->sd_logd_waitq); | |
d6a079e8 | 124 | spin_lock_init(&sdp->sd_ail_lock); |
b3b94faa DT |
125 | INIT_LIST_HEAD(&sdp->sd_ail1_list); |
126 | INIT_LIST_HEAD(&sdp->sd_ail2_list); | |
127 | ||
484adff8 | 128 | init_rwsem(&sdp->sd_log_flush_lock); |
16615be1 SW |
129 | atomic_set(&sdp->sd_log_in_flight, 0); |
130 | init_waitqueue_head(&sdp->sd_log_flush_wait); | |
b3b94faa DT |
131 | |
132 | INIT_LIST_HEAD(&sdp->sd_revoke_list); | |
133 | ||
b3b94faa DT |
134 | return sdp; |
135 | } | |
136 | ||
b3b94faa | 137 | |
9b8df98f SW |
138 | /** |
139 | * gfs2_check_sb - Check superblock | |
140 | * @sdp: the filesystem | |
141 | * @sb: The superblock | |
142 | * @silent: Don't print a message if the check fails | |
143 | * | |
144 | * Checks the version code of the FS is one that we understand how to | |
145 | * read and that the sizes of the various on-disk structures have not | |
146 | * changed. | |
147 | */ | |
148 | ||
32e471ef | 149 | static int gfs2_check_sb(struct gfs2_sbd *sdp, int silent) |
9b8df98f | 150 | { |
32e471ef SW |
151 | struct gfs2_sb_host *sb = &sdp->sd_sb; |
152 | ||
9b8df98f SW |
153 | if (sb->sb_magic != GFS2_MAGIC || |
154 | sb->sb_type != GFS2_METATYPE_SB) { | |
155 | if (!silent) | |
156 | printk(KERN_WARNING "GFS2: not a GFS2 filesystem\n"); | |
157 | return -EINVAL; | |
158 | } | |
159 | ||
160 | /* If format numbers match exactly, we're done. */ | |
161 | ||
162 | if (sb->sb_fs_format == GFS2_FORMAT_FS && | |
163 | sb->sb_multihost_format == GFS2_FORMAT_MULTI) | |
164 | return 0; | |
165 | ||
c80dbb58 | 166 | fs_warn(sdp, "Unknown on-disk format, unable to mount\n"); |
9b8df98f | 167 | |
c80dbb58 | 168 | return -EINVAL; |
9b8df98f SW |
169 | } |
170 | ||
171 | static void end_bio_io_page(struct bio *bio, int error) | |
172 | { | |
173 | struct page *page = bio->bi_private; | |
174 | ||
175 | if (!error) | |
176 | SetPageUptodate(page); | |
177 | else | |
178 | printk(KERN_WARNING "gfs2: error %d reading superblock\n", error); | |
179 | unlock_page(page); | |
180 | } | |
181 | ||
32e471ef | 182 | static void gfs2_sb_in(struct gfs2_sbd *sdp, const void *buf) |
9b8df98f | 183 | { |
32e471ef SW |
184 | struct gfs2_sb_host *sb = &sdp->sd_sb; |
185 | struct super_block *s = sdp->sd_vfs; | |
9b8df98f SW |
186 | const struct gfs2_sb *str = buf; |
187 | ||
188 | sb->sb_magic = be32_to_cpu(str->sb_header.mh_magic); | |
189 | sb->sb_type = be32_to_cpu(str->sb_header.mh_type); | |
190 | sb->sb_format = be32_to_cpu(str->sb_header.mh_format); | |
191 | sb->sb_fs_format = be32_to_cpu(str->sb_fs_format); | |
192 | sb->sb_multihost_format = be32_to_cpu(str->sb_multihost_format); | |
193 | sb->sb_bsize = be32_to_cpu(str->sb_bsize); | |
194 | sb->sb_bsize_shift = be32_to_cpu(str->sb_bsize_shift); | |
195 | sb->sb_master_dir.no_addr = be64_to_cpu(str->sb_master_dir.no_addr); | |
196 | sb->sb_master_dir.no_formal_ino = be64_to_cpu(str->sb_master_dir.no_formal_ino); | |
197 | sb->sb_root_dir.no_addr = be64_to_cpu(str->sb_root_dir.no_addr); | |
198 | sb->sb_root_dir.no_formal_ino = be64_to_cpu(str->sb_root_dir.no_formal_ino); | |
199 | ||
200 | memcpy(sb->sb_lockproto, str->sb_lockproto, GFS2_LOCKNAME_LEN); | |
201 | memcpy(sb->sb_locktable, str->sb_locktable, GFS2_LOCKNAME_LEN); | |
32e471ef | 202 | memcpy(s->s_uuid, str->sb_uuid, 16); |
9b8df98f SW |
203 | } |
204 | ||
205 | /** | |
206 | * gfs2_read_super - Read the gfs2 super block from disk | |
207 | * @sdp: The GFS2 super block | |
208 | * @sector: The location of the super block | |
209 | * @error: The error code to return | |
210 | * | |
211 | * This uses the bio functions to read the super block from disk | |
212 | * because we want to be 100% sure that we never read cached data. | |
213 | * A super block is read twice only during each GFS2 mount and is | |
214 | * never written to by the filesystem. The first time its read no | |
215 | * locks are held, and the only details which are looked at are those | |
216 | * relating to the locking protocol. Once locking is up and working, | |
217 | * the sb is read again under the lock to establish the location of | |
218 | * the master directory (contains pointers to journals etc) and the | |
219 | * root directory. | |
220 | * | |
221 | * Returns: 0 on success or error | |
222 | */ | |
223 | ||
32e471ef | 224 | static int gfs2_read_super(struct gfs2_sbd *sdp, sector_t sector, int silent) |
9b8df98f SW |
225 | { |
226 | struct super_block *sb = sdp->sd_vfs; | |
227 | struct gfs2_sb *p; | |
228 | struct page *page; | |
229 | struct bio *bio; | |
230 | ||
231 | page = alloc_page(GFP_NOFS); | |
232 | if (unlikely(!page)) | |
233 | return -ENOBUFS; | |
234 | ||
235 | ClearPageUptodate(page); | |
236 | ClearPageDirty(page); | |
237 | lock_page(page); | |
238 | ||
239 | bio = bio_alloc(GFP_NOFS, 1); | |
9b8df98f SW |
240 | bio->bi_sector = sector * (sb->s_blocksize >> 9); |
241 | bio->bi_bdev = sb->s_bdev; | |
242 | bio_add_page(bio, page, PAGE_SIZE, 0); | |
243 | ||
244 | bio->bi_end_io = end_bio_io_page; | |
245 | bio->bi_private = page; | |
20ed0535 | 246 | submit_bio(READ_SYNC | REQ_META, bio); |
9b8df98f SW |
247 | wait_on_page_locked(page); |
248 | bio_put(bio); | |
249 | if (!PageUptodate(page)) { | |
250 | __free_page(page); | |
251 | return -EIO; | |
252 | } | |
253 | p = kmap(page); | |
32e471ef | 254 | gfs2_sb_in(sdp, p); |
9b8df98f SW |
255 | kunmap(page); |
256 | __free_page(page); | |
32e471ef | 257 | return gfs2_check_sb(sdp, silent); |
9b8df98f | 258 | } |
6bac243f | 259 | |
9b8df98f SW |
260 | /** |
261 | * gfs2_read_sb - Read super block | |
262 | * @sdp: The GFS2 superblock | |
9b8df98f SW |
263 | * @silent: Don't print message if mount fails |
264 | * | |
265 | */ | |
266 | ||
6bac243f | 267 | static int gfs2_read_sb(struct gfs2_sbd *sdp, int silent) |
9b8df98f SW |
268 | { |
269 | u32 hash_blocks, ind_blocks, leaf_blocks; | |
270 | u32 tmp_blocks; | |
271 | unsigned int x; | |
272 | int error; | |
273 | ||
32e471ef | 274 | error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift, silent); |
9b8df98f SW |
275 | if (error) { |
276 | if (!silent) | |
277 | fs_err(sdp, "can't read superblock\n"); | |
278 | return error; | |
279 | } | |
280 | ||
9b8df98f SW |
281 | sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift - |
282 | GFS2_BASIC_BLOCK_SHIFT; | |
283 | sdp->sd_fsb2bb = 1 << sdp->sd_fsb2bb_shift; | |
284 | sdp->sd_diptrs = (sdp->sd_sb.sb_bsize - | |
285 | sizeof(struct gfs2_dinode)) / sizeof(u64); | |
286 | sdp->sd_inptrs = (sdp->sd_sb.sb_bsize - | |
287 | sizeof(struct gfs2_meta_header)) / sizeof(u64); | |
288 | sdp->sd_jbsize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_meta_header); | |
289 | sdp->sd_hash_bsize = sdp->sd_sb.sb_bsize / 2; | |
290 | sdp->sd_hash_bsize_shift = sdp->sd_sb.sb_bsize_shift - 1; | |
291 | sdp->sd_hash_ptrs = sdp->sd_hash_bsize / sizeof(u64); | |
292 | sdp->sd_qc_per_block = (sdp->sd_sb.sb_bsize - | |
293 | sizeof(struct gfs2_meta_header)) / | |
294 | sizeof(struct gfs2_quota_change); | |
a68a0a35 BP |
295 | sdp->sd_blocks_per_bitmap = (sdp->sd_sb.sb_bsize - |
296 | sizeof(struct gfs2_meta_header)) | |
297 | * GFS2_NBBY; /* not the rgrp bitmap, subsequent bitmaps only */ | |
9b8df98f SW |
298 | |
299 | /* Compute maximum reservation required to add a entry to a directory */ | |
300 | ||
301 | hash_blocks = DIV_ROUND_UP(sizeof(u64) * (1 << GFS2_DIR_MAX_DEPTH), | |
302 | sdp->sd_jbsize); | |
303 | ||
304 | ind_blocks = 0; | |
305 | for (tmp_blocks = hash_blocks; tmp_blocks > sdp->sd_diptrs;) { | |
306 | tmp_blocks = DIV_ROUND_UP(tmp_blocks, sdp->sd_inptrs); | |
307 | ind_blocks += tmp_blocks; | |
308 | } | |
309 | ||
310 | leaf_blocks = 2 + GFS2_DIR_MAX_DEPTH; | |
311 | ||
312 | sdp->sd_max_dirres = hash_blocks + ind_blocks + leaf_blocks; | |
313 | ||
314 | sdp->sd_heightsize[0] = sdp->sd_sb.sb_bsize - | |
315 | sizeof(struct gfs2_dinode); | |
316 | sdp->sd_heightsize[1] = sdp->sd_sb.sb_bsize * sdp->sd_diptrs; | |
317 | for (x = 2;; x++) { | |
318 | u64 space, d; | |
319 | u32 m; | |
320 | ||
321 | space = sdp->sd_heightsize[x - 1] * sdp->sd_inptrs; | |
322 | d = space; | |
323 | m = do_div(d, sdp->sd_inptrs); | |
324 | ||
325 | if (d != sdp->sd_heightsize[x - 1] || m) | |
326 | break; | |
327 | sdp->sd_heightsize[x] = space; | |
328 | } | |
329 | sdp->sd_max_height = x; | |
330 | sdp->sd_heightsize[x] = ~0; | |
331 | gfs2_assert(sdp, sdp->sd_max_height <= GFS2_MAX_META_HEIGHT); | |
332 | ||
333 | sdp->sd_jheightsize[0] = sdp->sd_sb.sb_bsize - | |
334 | sizeof(struct gfs2_dinode); | |
335 | sdp->sd_jheightsize[1] = sdp->sd_jbsize * sdp->sd_diptrs; | |
336 | for (x = 2;; x++) { | |
337 | u64 space, d; | |
338 | u32 m; | |
339 | ||
340 | space = sdp->sd_jheightsize[x - 1] * sdp->sd_inptrs; | |
341 | d = space; | |
342 | m = do_div(d, sdp->sd_inptrs); | |
343 | ||
344 | if (d != sdp->sd_jheightsize[x - 1] || m) | |
345 | break; | |
346 | sdp->sd_jheightsize[x] = space; | |
347 | } | |
348 | sdp->sd_max_jheight = x; | |
349 | sdp->sd_jheightsize[x] = ~0; | |
350 | gfs2_assert(sdp, sdp->sd_max_jheight <= GFS2_MAX_META_HEIGHT); | |
351 | ||
352 | return 0; | |
353 | } | |
354 | ||
b3b94faa DT |
355 | static int init_names(struct gfs2_sbd *sdp, int silent) |
356 | { | |
b3b94faa DT |
357 | char *proto, *table; |
358 | int error = 0; | |
359 | ||
360 | proto = sdp->sd_args.ar_lockproto; | |
361 | table = sdp->sd_args.ar_locktable; | |
362 | ||
363 | /* Try to autodetect */ | |
364 | ||
365 | if (!proto[0] || !table[0]) { | |
32e471ef | 366 | error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift, silent); |
bb8d8a6f SW |
367 | if (error) |
368 | return error; | |
3cf1e7be | 369 | |
b3b94faa | 370 | if (!proto[0]) |
3cf1e7be | 371 | proto = sdp->sd_sb.sb_lockproto; |
b3b94faa | 372 | if (!table[0]) |
3cf1e7be | 373 | table = sdp->sd_sb.sb_locktable; |
b3b94faa DT |
374 | } |
375 | ||
376 | if (!table[0]) | |
377 | table = sdp->sd_vfs->s_id; | |
378 | ||
00377d8e JD |
379 | strlcpy(sdp->sd_proto_name, proto, GFS2_FSNAME_LEN); |
380 | strlcpy(sdp->sd_table_name, table, GFS2_FSNAME_LEN); | |
b3b94faa | 381 | |
5d35e31f DC |
382 | table = sdp->sd_table_name; |
383 | while ((table = strchr(table, '/'))) | |
b35997d4 RP |
384 | *table = '_'; |
385 | ||
b3b94faa DT |
386 | return error; |
387 | } | |
388 | ||
389 | static int init_locking(struct gfs2_sbd *sdp, struct gfs2_holder *mount_gh, | |
390 | int undo) | |
391 | { | |
b3b94faa DT |
392 | int error = 0; |
393 | ||
394 | if (undo) | |
395 | goto fail_trans; | |
396 | ||
b3b94faa DT |
397 | error = gfs2_glock_nq_num(sdp, |
398 | GFS2_MOUNT_LOCK, &gfs2_nondisk_glops, | |
399 | LM_ST_EXCLUSIVE, LM_FLAG_NOEXP | GL_NOCACHE, | |
400 | mount_gh); | |
401 | if (error) { | |
402 | fs_err(sdp, "can't acquire mount glock: %d\n", error); | |
403 | goto fail; | |
404 | } | |
405 | ||
406 | error = gfs2_glock_nq_num(sdp, | |
407 | GFS2_LIVE_LOCK, &gfs2_nondisk_glops, | |
408 | LM_ST_SHARED, | |
579b78a4 | 409 | LM_FLAG_NOEXP | GL_EXACT, |
b3b94faa DT |
410 | &sdp->sd_live_gh); |
411 | if (error) { | |
412 | fs_err(sdp, "can't acquire live glock: %d\n", error); | |
413 | goto fail_mount; | |
414 | } | |
415 | ||
416 | error = gfs2_glock_get(sdp, GFS2_RENAME_LOCK, &gfs2_nondisk_glops, | |
417 | CREATE, &sdp->sd_rename_gl); | |
418 | if (error) { | |
419 | fs_err(sdp, "can't create rename glock: %d\n", error); | |
420 | goto fail_live; | |
421 | } | |
422 | ||
423 | error = gfs2_glock_get(sdp, GFS2_TRANS_LOCK, &gfs2_trans_glops, | |
424 | CREATE, &sdp->sd_trans_gl); | |
425 | if (error) { | |
426 | fs_err(sdp, "can't create transaction glock: %d\n", error); | |
427 | goto fail_rename; | |
428 | } | |
b3b94faa DT |
429 | |
430 | return 0; | |
431 | ||
feaa7bba | 432 | fail_trans: |
b3b94faa | 433 | gfs2_glock_put(sdp->sd_trans_gl); |
feaa7bba | 434 | fail_rename: |
b3b94faa | 435 | gfs2_glock_put(sdp->sd_rename_gl); |
feaa7bba | 436 | fail_live: |
b3b94faa | 437 | gfs2_glock_dq_uninit(&sdp->sd_live_gh); |
feaa7bba | 438 | fail_mount: |
b3b94faa | 439 | gfs2_glock_dq_uninit(mount_gh); |
feaa7bba | 440 | fail: |
b3b94faa DT |
441 | return error; |
442 | } | |
443 | ||
9b8df98f SW |
444 | static int gfs2_lookup_root(struct super_block *sb, struct dentry **dptr, |
445 | u64 no_addr, const char *name) | |
f42faf4f | 446 | { |
9b8df98f SW |
447 | struct gfs2_sbd *sdp = sb->s_fs_info; |
448 | struct dentry *dentry; | |
449 | struct inode *inode; | |
450 | ||
44ad37d6 | 451 | inode = gfs2_inode_lookup(sb, DT_DIR, no_addr, 0, 0); |
9b8df98f SW |
452 | if (IS_ERR(inode)) { |
453 | fs_err(sdp, "can't read in %s inode: %ld\n", name, PTR_ERR(inode)); | |
454 | return PTR_ERR(inode); | |
455 | } | |
48fde701 | 456 | dentry = d_make_root(inode); |
9b8df98f SW |
457 | if (!dentry) { |
458 | fs_err(sdp, "can't alloc %s dentry\n", name); | |
9b8df98f SW |
459 | return -ENOMEM; |
460 | } | |
9b8df98f SW |
461 | *dptr = dentry; |
462 | return 0; | |
f42faf4f SW |
463 | } |
464 | ||
9b8df98f | 465 | static int init_sb(struct gfs2_sbd *sdp, int silent) |
b3b94faa DT |
466 | { |
467 | struct super_block *sb = sdp->sd_vfs; | |
468 | struct gfs2_holder sb_gh; | |
dbb7cae2 | 469 | u64 no_addr; |
9b8df98f | 470 | int ret; |
b3b94faa | 471 | |
9b8df98f SW |
472 | ret = gfs2_glock_nq_num(sdp, GFS2_SB_LOCK, &gfs2_meta_glops, |
473 | LM_ST_SHARED, 0, &sb_gh); | |
474 | if (ret) { | |
475 | fs_err(sdp, "can't acquire superblock glock: %d\n", ret); | |
476 | return ret; | |
b3b94faa | 477 | } |
907b9bce | 478 | |
6bac243f | 479 | ret = gfs2_read_sb(sdp, silent); |
9b8df98f SW |
480 | if (ret) { |
481 | fs_err(sdp, "can't read superblock: %d\n", ret); | |
b3b94faa DT |
482 | goto out; |
483 | } | |
484 | ||
485 | /* Set up the buffer cache and SB for real */ | |
e1defc4f | 486 | if (sdp->sd_sb.sb_bsize < bdev_logical_block_size(sb->s_bdev)) { |
9b8df98f | 487 | ret = -EINVAL; |
b3b94faa DT |
488 | fs_err(sdp, "FS block size (%u) is too small for device " |
489 | "block size (%u)\n", | |
e1defc4f | 490 | sdp->sd_sb.sb_bsize, bdev_logical_block_size(sb->s_bdev)); |
b3b94faa DT |
491 | goto out; |
492 | } | |
493 | if (sdp->sd_sb.sb_bsize > PAGE_SIZE) { | |
9b8df98f | 494 | ret = -EINVAL; |
b3b94faa DT |
495 | fs_err(sdp, "FS block size (%u) is too big for machine " |
496 | "page size (%u)\n", | |
497 | sdp->sd_sb.sb_bsize, (unsigned int)PAGE_SIZE); | |
498 | goto out; | |
499 | } | |
b3b94faa DT |
500 | sb_set_blocksize(sb, sdp->sd_sb.sb_bsize); |
501 | ||
f42faf4f | 502 | /* Get the root inode */ |
dbb7cae2 | 503 | no_addr = sdp->sd_sb.sb_root_dir.no_addr; |
9b8df98f SW |
504 | ret = gfs2_lookup_root(sb, &sdp->sd_root_dir, no_addr, "root"); |
505 | if (ret) | |
f42faf4f | 506 | goto out; |
b3b94faa | 507 | |
9b8df98f SW |
508 | /* Get the master inode */ |
509 | no_addr = sdp->sd_sb.sb_master_dir.no_addr; | |
510 | ret = gfs2_lookup_root(sb, &sdp->sd_master_dir, no_addr, "master"); | |
511 | if (ret) { | |
512 | dput(sdp->sd_root_dir); | |
513 | goto out; | |
514 | } | |
515 | sb->s_root = dget(sdp->sd_args.ar_meta ? sdp->sd_master_dir : sdp->sd_root_dir); | |
f42faf4f | 516 | out: |
b3b94faa | 517 | gfs2_glock_dq_uninit(&sb_gh); |
9b8df98f | 518 | return ret; |
b3b94faa DT |
519 | } |
520 | ||
da6dd40d BP |
521 | /** |
522 | * map_journal_extents - create a reusable "extent" mapping from all logical | |
523 | * blocks to all physical blocks for the given journal. This will save | |
524 | * us time when writing journal blocks. Most journals will have only one | |
525 | * extent that maps all their logical blocks. That's because gfs2.mkfs | |
526 | * arranges the journal blocks sequentially to maximize performance. | |
527 | * So the extent would map the first block for the entire file length. | |
528 | * However, gfs2_jadd can happen while file activity is happening, so | |
529 | * those journals may not be sequential. Less likely is the case where | |
530 | * the users created their own journals by mounting the metafs and | |
531 | * laying it out. But it's still possible. These journals might have | |
532 | * several extents. | |
533 | * | |
534 | * TODO: This should be done in bigger chunks rather than one block at a time, | |
535 | * but since it's only done at mount time, I'm not worried about the | |
536 | * time it takes. | |
537 | */ | |
538 | static int map_journal_extents(struct gfs2_sbd *sdp) | |
539 | { | |
540 | struct gfs2_jdesc *jd = sdp->sd_jdesc; | |
541 | unsigned int lb; | |
542 | u64 db, prev_db; /* logical block, disk block, prev disk block */ | |
543 | struct gfs2_inode *ip = GFS2_I(jd->jd_inode); | |
544 | struct gfs2_journal_extent *jext = NULL; | |
545 | struct buffer_head bh; | |
546 | int rc = 0; | |
547 | ||
da6dd40d BP |
548 | prev_db = 0; |
549 | ||
a2e0f799 | 550 | for (lb = 0; lb < i_size_read(jd->jd_inode) >> sdp->sd_sb.sb_bsize_shift; lb++) { |
da6dd40d BP |
551 | bh.b_state = 0; |
552 | bh.b_blocknr = 0; | |
553 | bh.b_size = 1 << ip->i_inode.i_blkbits; | |
554 | rc = gfs2_block_map(jd->jd_inode, lb, &bh, 0); | |
555 | db = bh.b_blocknr; | |
556 | if (rc || !db) { | |
557 | printk(KERN_INFO "GFS2 journal mapping error %d: lb=" | |
558 | "%u db=%llu\n", rc, lb, (unsigned long long)db); | |
559 | break; | |
560 | } | |
561 | if (!prev_db || db != prev_db + 1) { | |
562 | jext = kzalloc(sizeof(struct gfs2_journal_extent), | |
563 | GFP_KERNEL); | |
564 | if (!jext) { | |
565 | printk(KERN_INFO "GFS2 error: out of memory " | |
566 | "mapping journal extents.\n"); | |
567 | rc = -ENOMEM; | |
568 | break; | |
569 | } | |
570 | jext->dblock = db; | |
571 | jext->lblock = lb; | |
572 | jext->blocks = 1; | |
573 | list_add_tail(&jext->extent_list, &jd->extent_list); | |
574 | } else { | |
575 | jext->blocks++; | |
576 | } | |
577 | prev_db = db; | |
578 | } | |
579 | return rc; | |
580 | } | |
581 | ||
f057f6cd | 582 | static void gfs2_others_may_mount(struct gfs2_sbd *sdp) |
da755fdb | 583 | { |
f057f6cd SW |
584 | char *message = "FIRSTMOUNT=Done"; |
585 | char *envp[] = { message, NULL }; | |
e0c2a9aa DT |
586 | |
587 | fs_info(sdp, "first mount done, others may mount\n"); | |
588 | ||
589 | if (sdp->sd_lockstruct.ls_ops->lm_first_done) | |
590 | sdp->sd_lockstruct.ls_ops->lm_first_done(sdp); | |
591 | ||
f057f6cd | 592 | kobject_uevent_env(&sdp->sd_kobj, KOBJ_CHANGE, envp); |
da755fdb SW |
593 | } |
594 | ||
b5289681 SW |
595 | /** |
596 | * gfs2_jindex_hold - Grab a lock on the jindex | |
597 | * @sdp: The GFS2 superblock | |
598 | * @ji_gh: the holder for the jindex glock | |
599 | * | |
600 | * Returns: errno | |
601 | */ | |
602 | ||
603 | static int gfs2_jindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ji_gh) | |
604 | { | |
605 | struct gfs2_inode *dip = GFS2_I(sdp->sd_jindex); | |
606 | struct qstr name; | |
607 | char buf[20]; | |
608 | struct gfs2_jdesc *jd; | |
609 | int error; | |
610 | ||
611 | name.name = buf; | |
612 | ||
613 | mutex_lock(&sdp->sd_jindex_mutex); | |
614 | ||
615 | for (;;) { | |
616 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, ji_gh); | |
617 | if (error) | |
618 | break; | |
619 | ||
620 | name.len = sprintf(buf, "journal%u", sdp->sd_journals); | |
621 | name.hash = gfs2_disk_hash(name.name, name.len); | |
622 | ||
623 | error = gfs2_dir_check(sdp->sd_jindex, &name, NULL); | |
624 | if (error == -ENOENT) { | |
625 | error = 0; | |
626 | break; | |
627 | } | |
628 | ||
629 | gfs2_glock_dq_uninit(ji_gh); | |
630 | ||
631 | if (error) | |
632 | break; | |
633 | ||
634 | error = -ENOMEM; | |
635 | jd = kzalloc(sizeof(struct gfs2_jdesc), GFP_KERNEL); | |
636 | if (!jd) | |
637 | break; | |
638 | ||
639 | INIT_LIST_HEAD(&jd->extent_list); | |
6ecd7c2d | 640 | INIT_WORK(&jd->jd_work, gfs2_recover_func); |
b5289681 SW |
641 | jd->jd_inode = gfs2_lookupi(sdp->sd_jindex, &name, 1); |
642 | if (!jd->jd_inode || IS_ERR(jd->jd_inode)) { | |
643 | if (!jd->jd_inode) | |
644 | error = -ENOENT; | |
645 | else | |
646 | error = PTR_ERR(jd->jd_inode); | |
647 | kfree(jd); | |
648 | break; | |
649 | } | |
650 | ||
651 | spin_lock(&sdp->sd_jindex_spin); | |
652 | jd->jd_jid = sdp->sd_journals++; | |
653 | list_add_tail(&jd->jd_list, &sdp->sd_jindex_list); | |
654 | spin_unlock(&sdp->sd_jindex_spin); | |
655 | } | |
656 | ||
657 | mutex_unlock(&sdp->sd_jindex_mutex); | |
658 | ||
659 | return error; | |
660 | } | |
661 | ||
1d12d175 BP |
662 | /** |
663 | * check_journal_clean - Make sure a journal is clean for a spectator mount | |
664 | * @sdp: The GFS2 superblock | |
665 | * @jd: The journal descriptor | |
666 | * | |
667 | * Returns: 0 if the journal is clean or locked, else an error | |
668 | */ | |
669 | static int check_journal_clean(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd) | |
670 | { | |
671 | int error; | |
672 | struct gfs2_holder j_gh; | |
673 | struct gfs2_log_header_host head; | |
674 | struct gfs2_inode *ip; | |
675 | ||
676 | ip = GFS2_I(jd->jd_inode); | |
677 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_NOEXP | | |
678 | GL_EXACT | GL_NOCACHE, &j_gh); | |
679 | if (error) { | |
680 | fs_err(sdp, "Error locking journal for spectator mount.\n"); | |
681 | return -EPERM; | |
682 | } | |
683 | error = gfs2_jdesc_check(jd); | |
684 | if (error) { | |
685 | fs_err(sdp, "Error checking journal for spectator mount.\n"); | |
686 | goto out_unlock; | |
687 | } | |
688 | error = gfs2_find_jhead(jd, &head); | |
689 | if (error) { | |
690 | fs_err(sdp, "Error parsing journal for spectator mount.\n"); | |
691 | goto out_unlock; | |
692 | } | |
693 | if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) { | |
694 | error = -EPERM; | |
695 | fs_err(sdp, "jid=%u: Journal is dirty, so the first mounter " | |
696 | "must not be a spectator.\n", jd->jd_jid); | |
697 | } | |
698 | ||
699 | out_unlock: | |
700 | gfs2_glock_dq_uninit(&j_gh); | |
701 | return error; | |
702 | } | |
703 | ||
b3b94faa DT |
704 | static int init_journal(struct gfs2_sbd *sdp, int undo) |
705 | { | |
9b8df98f | 706 | struct inode *master = sdp->sd_master_dir->d_inode; |
b3b94faa | 707 | struct gfs2_holder ji_gh; |
5c676f6d | 708 | struct gfs2_inode *ip; |
b3b94faa DT |
709 | int jindex = 1; |
710 | int error = 0; | |
711 | ||
712 | if (undo) { | |
713 | jindex = 0; | |
fe64d517 | 714 | goto fail_jinode_gh; |
b3b94faa DT |
715 | } |
716 | ||
9b8df98f | 717 | sdp->sd_jindex = gfs2_lookup_simple(master, "jindex"); |
c752666c | 718 | if (IS_ERR(sdp->sd_jindex)) { |
b3b94faa | 719 | fs_err(sdp, "can't lookup journal index: %d\n", error); |
c752666c | 720 | return PTR_ERR(sdp->sd_jindex); |
b3b94faa | 721 | } |
b3b94faa DT |
722 | |
723 | /* Load in the journal index special file */ | |
724 | ||
725 | error = gfs2_jindex_hold(sdp, &ji_gh); | |
726 | if (error) { | |
727 | fs_err(sdp, "can't read journal index: %d\n", error); | |
728 | goto fail; | |
729 | } | |
730 | ||
0e5a9fb0 | 731 | error = -EUSERS; |
b3b94faa DT |
732 | if (!gfs2_jindex_size(sdp)) { |
733 | fs_err(sdp, "no journals!\n"); | |
907b9bce | 734 | goto fail_jindex; |
b3b94faa DT |
735 | } |
736 | ||
737 | if (sdp->sd_args.ar_spectator) { | |
738 | sdp->sd_jdesc = gfs2_jdesc_find(sdp, 0); | |
fd041f0b | 739 | atomic_set(&sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks); |
5e687eac BM |
740 | atomic_set(&sdp->sd_log_thresh1, 2*sdp->sd_jdesc->jd_blocks/5); |
741 | atomic_set(&sdp->sd_log_thresh2, 4*sdp->sd_jdesc->jd_blocks/5); | |
b3b94faa DT |
742 | } else { |
743 | if (sdp->sd_lockstruct.ls_jid >= gfs2_jindex_size(sdp)) { | |
744 | fs_err(sdp, "can't mount journal #%u\n", | |
745 | sdp->sd_lockstruct.ls_jid); | |
746 | fs_err(sdp, "there are only %u journals (0 - %u)\n", | |
747 | gfs2_jindex_size(sdp), | |
748 | gfs2_jindex_size(sdp) - 1); | |
749 | goto fail_jindex; | |
750 | } | |
751 | sdp->sd_jdesc = gfs2_jdesc_find(sdp, sdp->sd_lockstruct.ls_jid); | |
752 | ||
feaa7bba | 753 | error = gfs2_glock_nq_num(sdp, sdp->sd_lockstruct.ls_jid, |
b3b94faa DT |
754 | &gfs2_journal_glops, |
755 | LM_ST_EXCLUSIVE, LM_FLAG_NOEXP, | |
756 | &sdp->sd_journal_gh); | |
757 | if (error) { | |
758 | fs_err(sdp, "can't acquire journal glock: %d\n", error); | |
759 | goto fail_jindex; | |
760 | } | |
761 | ||
feaa7bba SW |
762 | ip = GFS2_I(sdp->sd_jdesc->jd_inode); |
763 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, | |
75be73a8 | 764 | LM_FLAG_NOEXP | GL_EXACT | GL_NOCACHE, |
b3b94faa DT |
765 | &sdp->sd_jinode_gh); |
766 | if (error) { | |
767 | fs_err(sdp, "can't acquire journal inode glock: %d\n", | |
768 | error); | |
769 | goto fail_journal_gh; | |
770 | } | |
771 | ||
772 | error = gfs2_jdesc_check(sdp->sd_jdesc); | |
773 | if (error) { | |
774 | fs_err(sdp, "my journal (%u) is bad: %d\n", | |
775 | sdp->sd_jdesc->jd_jid, error); | |
776 | goto fail_jinode_gh; | |
777 | } | |
fd041f0b | 778 | atomic_set(&sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks); |
5e687eac BM |
779 | atomic_set(&sdp->sd_log_thresh1, 2*sdp->sd_jdesc->jd_blocks/5); |
780 | atomic_set(&sdp->sd_log_thresh2, 4*sdp->sd_jdesc->jd_blocks/5); | |
da6dd40d BP |
781 | |
782 | /* Map the extents for this journal's blocks */ | |
783 | map_journal_extents(sdp); | |
b3b94faa | 784 | } |
63997775 | 785 | trace_gfs2_log_blocks(sdp, atomic_read(&sdp->sd_log_blks_free)); |
b3b94faa DT |
786 | |
787 | if (sdp->sd_lockstruct.ls_first) { | |
788 | unsigned int x; | |
789 | for (x = 0; x < sdp->sd_journals; x++) { | |
1d12d175 BP |
790 | struct gfs2_jdesc *jd = gfs2_jdesc_find(sdp, x); |
791 | ||
792 | if (sdp->sd_args.ar_spectator) { | |
793 | error = check_journal_clean(sdp, jd); | |
794 | if (error) | |
795 | goto fail_jinode_gh; | |
796 | continue; | |
797 | } | |
798 | error = gfs2_recover_journal(jd, true); | |
b3b94faa DT |
799 | if (error) { |
800 | fs_err(sdp, "error recovering journal %u: %d\n", | |
801 | x, error); | |
802 | goto fail_jinode_gh; | |
803 | } | |
804 | } | |
805 | ||
f057f6cd | 806 | gfs2_others_may_mount(sdp); |
b3b94faa | 807 | } else if (!sdp->sd_args.ar_spectator) { |
6ecd7c2d | 808 | error = gfs2_recover_journal(sdp->sd_jdesc, true); |
b3b94faa DT |
809 | if (error) { |
810 | fs_err(sdp, "error recovering my journal: %d\n", error); | |
811 | goto fail_jinode_gh; | |
812 | } | |
813 | } | |
814 | ||
815 | set_bit(SDF_JOURNAL_CHECKED, &sdp->sd_flags); | |
816 | gfs2_glock_dq_uninit(&ji_gh); | |
817 | jindex = 0; | |
818 | ||
b3b94faa DT |
819 | return 0; |
820 | ||
a91ea69f | 821 | fail_jinode_gh: |
b3b94faa DT |
822 | if (!sdp->sd_args.ar_spectator) |
823 | gfs2_glock_dq_uninit(&sdp->sd_jinode_gh); | |
a91ea69f | 824 | fail_journal_gh: |
b3b94faa DT |
825 | if (!sdp->sd_args.ar_spectator) |
826 | gfs2_glock_dq_uninit(&sdp->sd_journal_gh); | |
a91ea69f | 827 | fail_jindex: |
b3b94faa DT |
828 | gfs2_jindex_free(sdp); |
829 | if (jindex) | |
830 | gfs2_glock_dq_uninit(&ji_gh); | |
a91ea69f | 831 | fail: |
f42faf4f | 832 | iput(sdp->sd_jindex); |
b3b94faa DT |
833 | return error; |
834 | } | |
835 | ||
56aa72d0 | 836 | static struct lock_class_key gfs2_quota_imutex_key; |
b3b94faa DT |
837 | |
838 | static int init_inodes(struct gfs2_sbd *sdp, int undo) | |
839 | { | |
b3b94faa | 840 | int error = 0; |
9b8df98f | 841 | struct inode *master = sdp->sd_master_dir->d_inode; |
b3b94faa DT |
842 | |
843 | if (undo) | |
f42faf4f SW |
844 | goto fail_qinode; |
845 | ||
f42faf4f SW |
846 | error = init_journal(sdp, undo); |
847 | if (error) | |
9b8df98f | 848 | goto fail; |
b3b94faa | 849 | |
b3b94faa | 850 | /* Read in the master statfs inode */ |
9b8df98f | 851 | sdp->sd_statfs_inode = gfs2_lookup_simple(master, "statfs"); |
c752666c SW |
852 | if (IS_ERR(sdp->sd_statfs_inode)) { |
853 | error = PTR_ERR(sdp->sd_statfs_inode); | |
b3b94faa | 854 | fs_err(sdp, "can't read in statfs inode: %d\n", error); |
8d8291ae | 855 | goto fail_journal; |
b3b94faa DT |
856 | } |
857 | ||
858 | /* Read in the resource index inode */ | |
9b8df98f | 859 | sdp->sd_rindex = gfs2_lookup_simple(master, "rindex"); |
c752666c SW |
860 | if (IS_ERR(sdp->sd_rindex)) { |
861 | error = PTR_ERR(sdp->sd_rindex); | |
b3b94faa DT |
862 | fs_err(sdp, "can't get resource index inode: %d\n", error); |
863 | goto fail_statfs; | |
864 | } | |
cf45b752 | 865 | sdp->sd_rindex_uptodate = 0; |
b3b94faa DT |
866 | |
867 | /* Read in the quota inode */ | |
9b8df98f | 868 | sdp->sd_quota_inode = gfs2_lookup_simple(master, "quota"); |
c752666c SW |
869 | if (IS_ERR(sdp->sd_quota_inode)) { |
870 | error = PTR_ERR(sdp->sd_quota_inode); | |
b3b94faa DT |
871 | fs_err(sdp, "can't get quota file inode: %d\n", error); |
872 | goto fail_rindex; | |
873 | } | |
56aa72d0 JK |
874 | /* |
875 | * i_mutex on quota files is special. Since this inode is hidden system | |
876 | * file, we are safe to define locking ourselves. | |
877 | */ | |
878 | lockdep_set_class(&sdp->sd_quota_inode->i_mutex, | |
879 | &gfs2_quota_imutex_key); | |
a365fbf3 SW |
880 | |
881 | error = gfs2_rindex_update(sdp); | |
882 | if (error) | |
883 | goto fail_qinode; | |
884 | ||
b3b94faa DT |
885 | return 0; |
886 | ||
f42faf4f SW |
887 | fail_qinode: |
888 | iput(sdp->sd_quota_inode); | |
f42faf4f | 889 | fail_rindex: |
b3b94faa | 890 | gfs2_clear_rgrpd(sdp); |
f42faf4f | 891 | iput(sdp->sd_rindex); |
f42faf4f SW |
892 | fail_statfs: |
893 | iput(sdp->sd_statfs_inode); | |
f42faf4f SW |
894 | fail_journal: |
895 | init_journal(sdp, UNDO); | |
f42faf4f | 896 | fail: |
b3b94faa DT |
897 | return error; |
898 | } | |
899 | ||
900 | static int init_per_node(struct gfs2_sbd *sdp, int undo) | |
901 | { | |
f42faf4f | 902 | struct inode *pn = NULL; |
b3b94faa DT |
903 | char buf[30]; |
904 | int error = 0; | |
5c676f6d | 905 | struct gfs2_inode *ip; |
9b8df98f | 906 | struct inode *master = sdp->sd_master_dir->d_inode; |
b3b94faa DT |
907 | |
908 | if (sdp->sd_args.ar_spectator) | |
909 | return 0; | |
910 | ||
911 | if (undo) | |
912 | goto fail_qc_gh; | |
913 | ||
9b8df98f | 914 | pn = gfs2_lookup_simple(master, "per_node"); |
c752666c SW |
915 | if (IS_ERR(pn)) { |
916 | error = PTR_ERR(pn); | |
b3b94faa DT |
917 | fs_err(sdp, "can't find per_node directory: %d\n", error); |
918 | return error; | |
919 | } | |
920 | ||
b3b94faa | 921 | sprintf(buf, "statfs_change%u", sdp->sd_jdesc->jd_jid); |
c752666c SW |
922 | sdp->sd_sc_inode = gfs2_lookup_simple(pn, buf); |
923 | if (IS_ERR(sdp->sd_sc_inode)) { | |
924 | error = PTR_ERR(sdp->sd_sc_inode); | |
b3b94faa | 925 | fs_err(sdp, "can't find local \"sc\" file: %d\n", error); |
8d8291ae | 926 | goto fail; |
b3b94faa DT |
927 | } |
928 | ||
b3b94faa | 929 | sprintf(buf, "quota_change%u", sdp->sd_jdesc->jd_jid); |
c752666c SW |
930 | sdp->sd_qc_inode = gfs2_lookup_simple(pn, buf); |
931 | if (IS_ERR(sdp->sd_qc_inode)) { | |
932 | error = PTR_ERR(sdp->sd_qc_inode); | |
b3b94faa DT |
933 | fs_err(sdp, "can't find local \"qc\" file: %d\n", error); |
934 | goto fail_ut_i; | |
935 | } | |
936 | ||
f42faf4f | 937 | iput(pn); |
b3b94faa DT |
938 | pn = NULL; |
939 | ||
feaa7bba | 940 | ip = GFS2_I(sdp->sd_sc_inode); |
8d8291ae | 941 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, |
b3b94faa DT |
942 | &sdp->sd_sc_gh); |
943 | if (error) { | |
944 | fs_err(sdp, "can't lock local \"sc\" file: %d\n", error); | |
8d8291ae | 945 | goto fail_qc_i; |
b3b94faa DT |
946 | } |
947 | ||
feaa7bba | 948 | ip = GFS2_I(sdp->sd_qc_inode); |
8d8291ae | 949 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, |
b3b94faa DT |
950 | &sdp->sd_qc_gh); |
951 | if (error) { | |
952 | fs_err(sdp, "can't lock local \"qc\" file: %d\n", error); | |
953 | goto fail_ut_gh; | |
954 | } | |
955 | ||
956 | return 0; | |
957 | ||
a91ea69f | 958 | fail_qc_gh: |
b3b94faa | 959 | gfs2_glock_dq_uninit(&sdp->sd_qc_gh); |
a91ea69f | 960 | fail_ut_gh: |
b3b94faa | 961 | gfs2_glock_dq_uninit(&sdp->sd_sc_gh); |
a91ea69f | 962 | fail_qc_i: |
f42faf4f | 963 | iput(sdp->sd_qc_inode); |
a91ea69f | 964 | fail_ut_i: |
f42faf4f | 965 | iput(sdp->sd_sc_inode); |
a91ea69f | 966 | fail: |
b3b94faa | 967 | if (pn) |
f42faf4f | 968 | iput(pn); |
b3b94faa DT |
969 | return error; |
970 | } | |
971 | ||
972 | static int init_threads(struct gfs2_sbd *sdp, int undo) | |
973 | { | |
974 | struct task_struct *p; | |
975 | int error = 0; | |
976 | ||
977 | if (undo) | |
feaa7bba | 978 | goto fail_quotad; |
b3b94faa | 979 | |
b3b94faa | 980 | p = kthread_run(gfs2_logd, sdp, "gfs2_logd"); |
a9aefd70 AK |
981 | if (IS_ERR(p)) { |
982 | error = PTR_ERR(p); | |
b3b94faa DT |
983 | fs_err(sdp, "can't start logd thread: %d\n", error); |
984 | return error; | |
985 | } | |
986 | sdp->sd_logd_process = p; | |
987 | ||
b3b94faa | 988 | p = kthread_run(gfs2_quotad, sdp, "gfs2_quotad"); |
a9aefd70 AK |
989 | if (IS_ERR(p)) { |
990 | error = PTR_ERR(p); | |
b3b94faa DT |
991 | fs_err(sdp, "can't start quotad thread: %d\n", error); |
992 | goto fail; | |
993 | } | |
994 | sdp->sd_quotad_process = p; | |
995 | ||
b3b94faa DT |
996 | return 0; |
997 | ||
b3b94faa | 998 | |
feaa7bba | 999 | fail_quotad: |
b3b94faa | 1000 | kthread_stop(sdp->sd_quotad_process); |
feaa7bba | 1001 | fail: |
b3b94faa | 1002 | kthread_stop(sdp->sd_logd_process); |
b3b94faa DT |
1003 | return error; |
1004 | } | |
da755fdb | 1005 | |
f057f6cd SW |
1006 | static const match_table_t nolock_tokens = { |
1007 | { Opt_jid, "jid=%d\n", }, | |
1008 | { Opt_err, NULL }, | |
1009 | }; | |
1010 | ||
1011 | static const struct lm_lockops nolock_ops = { | |
1012 | .lm_proto_name = "lock_nolock", | |
fc0e38da | 1013 | .lm_put_lock = gfs2_glock_free, |
f057f6cd SW |
1014 | .lm_tokens = &nolock_tokens, |
1015 | }; | |
1016 | ||
da755fdb SW |
1017 | /** |
1018 | * gfs2_lm_mount - mount a locking protocol | |
1019 | * @sdp: the filesystem | |
3ad2f3fb | 1020 | * @args: mount arguments |
da755fdb SW |
1021 | * @silent: if 1, don't complain if the FS isn't a GFS2 fs |
1022 | * | |
1023 | * Returns: errno | |
1024 | */ | |
1025 | ||
1026 | static int gfs2_lm_mount(struct gfs2_sbd *sdp, int silent) | |
1027 | { | |
f057f6cd SW |
1028 | const struct lm_lockops *lm; |
1029 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; | |
1030 | struct gfs2_args *args = &sdp->sd_args; | |
1031 | const char *proto = sdp->sd_proto_name; | |
1032 | const char *table = sdp->sd_table_name; | |
f057f6cd SW |
1033 | char *o, *options; |
1034 | int ret; | |
da755fdb | 1035 | |
f057f6cd SW |
1036 | if (!strcmp("lock_nolock", proto)) { |
1037 | lm = &nolock_ops; | |
1038 | sdp->sd_args.ar_localflocks = 1; | |
f057f6cd SW |
1039 | #ifdef CONFIG_GFS2_FS_LOCKING_DLM |
1040 | } else if (!strcmp("lock_dlm", proto)) { | |
1041 | lm = &gfs2_dlm_ops; | |
1042 | #endif | |
1043 | } else { | |
1044 | printk(KERN_INFO "GFS2: can't find protocol %s\n", proto); | |
1045 | return -ENOENT; | |
1046 | } | |
da755fdb SW |
1047 | |
1048 | fs_info(sdp, "Trying to join cluster \"%s\", \"%s\"\n", proto, table); | |
1049 | ||
f057f6cd SW |
1050 | ls->ls_ops = lm; |
1051 | ls->ls_first = 1; | |
da755fdb | 1052 | |
f057f6cd SW |
1053 | for (options = args->ar_hostdata; (o = strsep(&options, ":")); ) { |
1054 | substring_t tmp[MAX_OPT_ARGS]; | |
1055 | int token, option; | |
1056 | ||
1057 | if (!o || !*o) | |
1058 | continue; | |
1059 | ||
1060 | token = match_token(o, *lm->lm_tokens, tmp); | |
1061 | switch (token) { | |
1062 | case Opt_jid: | |
1063 | ret = match_int(&tmp[0], &option); | |
1064 | if (ret || option < 0) | |
1065 | goto hostdata_error; | |
ba6e9364 SW |
1066 | if (test_and_clear_bit(SDF_NOJOURNALID, &sdp->sd_flags)) |
1067 | ls->ls_jid = option; | |
f057f6cd SW |
1068 | break; |
1069 | case Opt_id: | |
4875647a | 1070 | case Opt_nodir: |
2b88f7c5 | 1071 | /* Obsolete, but left for backward compat purposes */ |
f057f6cd SW |
1072 | break; |
1073 | case Opt_first: | |
1074 | ret = match_int(&tmp[0], &option); | |
1075 | if (ret || (option != 0 && option != 1)) | |
1076 | goto hostdata_error; | |
1077 | ls->ls_first = option; | |
1078 | break; | |
f057f6cd SW |
1079 | case Opt_err: |
1080 | default: | |
1081 | hostdata_error: | |
1082 | fs_info(sdp, "unknown hostdata (%s)\n", o); | |
1083 | return -EINVAL; | |
1084 | } | |
da755fdb SW |
1085 | } |
1086 | ||
f057f6cd SW |
1087 | if (lm->lm_mount == NULL) { |
1088 | fs_info(sdp, "Now mounting FS...\n"); | |
19237039 | 1089 | complete_all(&sdp->sd_locking_init); |
f057f6cd | 1090 | return 0; |
da755fdb | 1091 | } |
e0c2a9aa | 1092 | ret = lm->lm_mount(sdp, table); |
f057f6cd SW |
1093 | if (ret == 0) |
1094 | fs_info(sdp, "Joined cluster. Now mounting FS...\n"); | |
19237039 | 1095 | complete_all(&sdp->sd_locking_init); |
f057f6cd | 1096 | return ret; |
da755fdb SW |
1097 | } |
1098 | ||
1099 | void gfs2_lm_unmount(struct gfs2_sbd *sdp) | |
1100 | { | |
f057f6cd SW |
1101 | const struct lm_lockops *lm = sdp->sd_lockstruct.ls_ops; |
1102 | if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) && | |
1103 | lm->lm_unmount) | |
1104 | lm->lm_unmount(sdp); | |
da755fdb | 1105 | } |
b3b94faa | 1106 | |
ba6e9364 SW |
1107 | static int gfs2_journalid_wait(void *word) |
1108 | { | |
1109 | if (signal_pending(current)) | |
1110 | return -EINTR; | |
1111 | schedule(); | |
1112 | return 0; | |
1113 | } | |
1114 | ||
1115 | static int wait_on_journal(struct gfs2_sbd *sdp) | |
1116 | { | |
ba6e9364 SW |
1117 | if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL) |
1118 | return 0; | |
1119 | ||
1120 | return wait_on_bit(&sdp->sd_flags, SDF_NOJOURNALID, gfs2_journalid_wait, TASK_INTERRUPTIBLE); | |
1121 | } | |
1122 | ||
8633ecfa SW |
1123 | void gfs2_online_uevent(struct gfs2_sbd *sdp) |
1124 | { | |
1125 | struct super_block *sb = sdp->sd_vfs; | |
1126 | char ro[20]; | |
1127 | char spectator[20]; | |
1128 | char *envp[] = { ro, spectator, NULL }; | |
1129 | sprintf(ro, "RDONLY=%d", (sb->s_flags & MS_RDONLY) ? 1 : 0); | |
1130 | sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0); | |
1131 | kobject_uevent_env(&sdp->sd_kobj, KOBJ_ONLINE, envp); | |
1132 | } | |
1133 | ||
b3b94faa DT |
1134 | /** |
1135 | * fill_super - Read in superblock | |
1136 | * @sb: The VFS superblock | |
1137 | * @data: Mount options | |
1138 | * @silent: Don't complain if it's not a GFS2 filesystem | |
1139 | * | |
1140 | * Returns: errno | |
1141 | */ | |
1142 | ||
f55073ff | 1143 | static int fill_super(struct super_block *sb, struct gfs2_args *args, int silent) |
b3b94faa DT |
1144 | { |
1145 | struct gfs2_sbd *sdp; | |
1146 | struct gfs2_holder mount_gh; | |
1147 | int error; | |
1148 | ||
1149 | sdp = init_sbd(sb); | |
1150 | if (!sdp) { | |
d92a8d48 | 1151 | printk(KERN_WARNING "GFS2: can't alloc struct gfs2_sbd\n"); |
b3b94faa DT |
1152 | return -ENOMEM; |
1153 | } | |
f55073ff | 1154 | sdp->sd_args = *args; |
b3b94faa | 1155 | |
fe64d517 | 1156 | if (sdp->sd_args.ar_spectator) { |
6f04c1c7 | 1157 | sb->s_flags |= MS_RDONLY; |
e8ca5cc5 | 1158 | set_bit(SDF_RORECOVERY, &sdp->sd_flags); |
fe64d517 | 1159 | } |
6f04c1c7 SW |
1160 | if (sdp->sd_args.ar_posix_acl) |
1161 | sb->s_flags |= MS_POSIXACL; | |
f25934c5 CH |
1162 | if (sdp->sd_args.ar_nobarrier) |
1163 | set_bit(SDF_NOBARRIERS, &sdp->sd_flags); | |
6f04c1c7 | 1164 | |
9964afbb | 1165 | sb->s_flags |= MS_NOSEC; |
719ee344 SW |
1166 | sb->s_magic = GFS2_MAGIC; |
1167 | sb->s_op = &gfs2_super_ops; | |
41ced6dc | 1168 | sb->s_d_op = &gfs2_dops; |
719ee344 | 1169 | sb->s_export_op = &gfs2_export_ops; |
40b78a32 | 1170 | sb->s_xattr = gfs2_xattr_handlers; |
cc632e7f SW |
1171 | sb->s_qcop = &gfs2_quotactl_ops; |
1172 | sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; | |
719ee344 SW |
1173 | sb->s_time_gran = 1; |
1174 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
419c93e0 SW |
1175 | |
1176 | /* Set up the buffer cache and fill in some fake block size values | |
1177 | to allow us to read-in the on-disk superblock. */ | |
1178 | sdp->sd_sb.sb_bsize = sb_min_blocksize(sb, GFS2_BASIC_BLOCK); | |
1179 | sdp->sd_sb.sb_bsize_shift = sb->s_blocksize_bits; | |
1180 | sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift - | |
1181 | GFS2_BASIC_BLOCK_SHIFT; | |
1182 | sdp->sd_fsb2bb = 1 << sdp->sd_fsb2bb_shift; | |
b3b94faa | 1183 | |
5e687eac | 1184 | sdp->sd_tune.gt_logd_secs = sdp->sd_args.ar_commit; |
3d3c10f2 BM |
1185 | sdp->sd_tune.gt_quota_quantum = sdp->sd_args.ar_quota_quantum; |
1186 | if (sdp->sd_args.ar_statfs_quantum) { | |
1187 | sdp->sd_tune.gt_statfs_slow = 0; | |
1188 | sdp->sd_tune.gt_statfs_quantum = sdp->sd_args.ar_statfs_quantum; | |
32e471ef | 1189 | } else { |
3d3c10f2 BM |
1190 | sdp->sd_tune.gt_statfs_slow = 1; |
1191 | sdp->sd_tune.gt_statfs_quantum = 30; | |
1192 | } | |
48c2b613 | 1193 | |
b3b94faa | 1194 | error = init_names(sdp, silent); |
0d515210 BP |
1195 | if (error) { |
1196 | /* In this case, we haven't initialized sysfs, so we have to | |
1197 | manually free the sdp. */ | |
1198 | free_percpu(sdp->sd_lkstats); | |
1199 | kfree(sdp); | |
1200 | sb->s_fs_info = NULL; | |
1201 | return error; | |
1202 | } | |
b3b94faa | 1203 | |
e0c2a9aa DT |
1204 | snprintf(sdp->sd_fsname, GFS2_FSNAME_LEN, "%s", sdp->sd_table_name); |
1205 | ||
b3b94faa | 1206 | error = gfs2_sys_fs_add(sdp); |
0d515210 BP |
1207 | /* |
1208 | * If we hit an error here, gfs2_sys_fs_add will have called function | |
1209 | * kobject_put which causes the sysfs usage count to go to zero, which | |
1210 | * causes sysfs to call function gfs2_sbd_release, which frees sdp. | |
1211 | * Subsequent error paths here will call gfs2_sys_fs_del, which also | |
1212 | * kobject_put to free sdp. | |
1213 | */ | |
b3b94faa | 1214 | if (error) |
0d515210 BP |
1215 | return error; |
1216 | ||
1217 | gfs2_create_debugfs_file(sdp); | |
b3b94faa DT |
1218 | |
1219 | error = gfs2_lm_mount(sdp, silent); | |
1220 | if (error) | |
0d515210 | 1221 | goto fail_debug; |
b3b94faa DT |
1222 | |
1223 | error = init_locking(sdp, &mount_gh, DO); | |
1224 | if (error) | |
1225 | goto fail_lm; | |
1226 | ||
9b8df98f | 1227 | error = init_sb(sdp, silent); |
b3b94faa DT |
1228 | if (error) |
1229 | goto fail_locking; | |
b3b94faa | 1230 | |
ba6e9364 SW |
1231 | error = wait_on_journal(sdp); |
1232 | if (error) | |
1233 | goto fail_sb; | |
1234 | ||
feb47ca9 SW |
1235 | /* |
1236 | * If user space has failed to join the cluster or some similar | |
1237 | * failure has occurred, then the journal id will contain a | |
1238 | * negative (error) number. This will then be returned to the | |
1239 | * caller (of the mount syscall). We do this even for spectator | |
1240 | * mounts (which just write a jid of 0 to indicate "ok" even though | |
1241 | * the jid is unused in the spectator case) | |
1242 | */ | |
1243 | if (sdp->sd_lockstruct.ls_jid < 0) { | |
1244 | error = sdp->sd_lockstruct.ls_jid; | |
1245 | sdp->sd_lockstruct.ls_jid = 0; | |
1246 | goto fail_sb; | |
1247 | } | |
1248 | ||
e0c2a9aa DT |
1249 | if (sdp->sd_args.ar_spectator) |
1250 | snprintf(sdp->sd_fsname, GFS2_FSNAME_LEN, "%s.s", | |
1251 | sdp->sd_table_name); | |
1252 | else | |
1253 | snprintf(sdp->sd_fsname, GFS2_FSNAME_LEN, "%s.%u", | |
1254 | sdp->sd_table_name, sdp->sd_lockstruct.ls_jid); | |
1255 | ||
b3b94faa DT |
1256 | error = init_inodes(sdp, DO); |
1257 | if (error) | |
f42faf4f | 1258 | goto fail_sb; |
b3b94faa DT |
1259 | |
1260 | error = init_per_node(sdp, DO); | |
1261 | if (error) | |
1262 | goto fail_inodes; | |
1263 | ||
1264 | error = gfs2_statfs_init(sdp); | |
1265 | if (error) { | |
1266 | fs_err(sdp, "can't initialize statfs subsystem: %d\n", error); | |
1267 | goto fail_per_node; | |
1268 | } | |
1269 | ||
1270 | error = init_threads(sdp, DO); | |
1271 | if (error) | |
1272 | goto fail_per_node; | |
1273 | ||
1274 | if (!(sb->s_flags & MS_RDONLY)) { | |
1275 | error = gfs2_make_fs_rw(sdp); | |
1276 | if (error) { | |
1277 | fs_err(sdp, "can't make FS RW: %d\n", error); | |
1278 | goto fail_threads; | |
1279 | } | |
1280 | } | |
1281 | ||
1282 | gfs2_glock_dq_uninit(&mount_gh); | |
8633ecfa | 1283 | gfs2_online_uevent(sdp); |
b3b94faa DT |
1284 | return 0; |
1285 | ||
a91ea69f | 1286 | fail_threads: |
b3b94faa | 1287 | init_threads(sdp, UNDO); |
a91ea69f | 1288 | fail_per_node: |
b3b94faa | 1289 | init_per_node(sdp, UNDO); |
a91ea69f | 1290 | fail_inodes: |
b3b94faa | 1291 | init_inodes(sdp, UNDO); |
a91ea69f | 1292 | fail_sb: |
9b8df98f SW |
1293 | if (sdp->sd_root_dir) |
1294 | dput(sdp->sd_root_dir); | |
1295 | if (sdp->sd_master_dir) | |
1296 | dput(sdp->sd_master_dir); | |
e7c8707e SW |
1297 | if (sb->s_root) |
1298 | dput(sb->s_root); | |
9b8df98f | 1299 | sb->s_root = NULL; |
a91ea69f | 1300 | fail_locking: |
b3b94faa | 1301 | init_locking(sdp, &mount_gh, UNDO); |
a91ea69f | 1302 | fail_lm: |
fefc03bf | 1303 | gfs2_gl_hash_clear(sdp); |
b3b94faa | 1304 | gfs2_lm_unmount(sdp); |
0d515210 | 1305 | fail_debug: |
5f882096 | 1306 | gfs2_delete_debugfs_file(sdp); |
a245769f | 1307 | free_percpu(sdp->sd_lkstats); |
0d515210 BP |
1308 | /* gfs2_sys_fs_del must be the last thing we do, since it causes |
1309 | * sysfs to call function gfs2_sbd_release, which frees sdp. */ | |
1310 | gfs2_sys_fs_del(sdp); | |
5c676f6d | 1311 | sb->s_fs_info = NULL; |
b3b94faa DT |
1312 | return error; |
1313 | } | |
1314 | ||
f55073ff | 1315 | static int set_gfs2_super(struct super_block *s, void *data) |
b3b94faa | 1316 | { |
f55073ff SW |
1317 | s->s_bdev = data; |
1318 | s->s_dev = s->s_bdev->bd_dev; | |
1319 | ||
1320 | /* | |
1321 | * We set the bdi here to the queue backing, file systems can | |
1322 | * overwrite this in ->fill_super() | |
1323 | */ | |
1324 | s->s_bdi = &bdev_get_queue(s->s_bdev)->backing_dev_info; | |
1325 | return 0; | |
86384605 AD |
1326 | } |
1327 | ||
f55073ff | 1328 | static int test_gfs2_super(struct super_block *s, void *ptr) |
f6d03139 SW |
1329 | { |
1330 | struct block_device *bdev = ptr; | |
1331 | return (bdev == s->s_bdev); | |
1332 | } | |
1333 | ||
f55073ff | 1334 | /** |
8bcbbf00 | 1335 | * gfs2_mount - Get the GFS2 superblock |
f55073ff SW |
1336 | * @fs_type: The GFS2 filesystem type |
1337 | * @flags: Mount flags | |
1338 | * @dev_name: The name of the device | |
1339 | * @data: The mount arguments | |
f55073ff SW |
1340 | * |
1341 | * Q. Why not use get_sb_bdev() ? | |
1342 | * A. We need to select one of two root directories to mount, independent | |
1343 | * of whether this is the initial, or subsequent, mount of this sb | |
1344 | * | |
1345 | * Returns: 0 or -ve on error | |
1346 | */ | |
1347 | ||
8bcbbf00 AV |
1348 | static struct dentry *gfs2_mount(struct file_system_type *fs_type, int flags, |
1349 | const char *dev_name, void *data) | |
f55073ff SW |
1350 | { |
1351 | struct block_device *bdev; | |
1352 | struct super_block *s; | |
d4d77629 | 1353 | fmode_t mode = FMODE_READ | FMODE_EXCL; |
f55073ff SW |
1354 | int error; |
1355 | struct gfs2_args args; | |
1356 | struct gfs2_sbd *sdp; | |
1357 | ||
1358 | if (!(flags & MS_RDONLY)) | |
1359 | mode |= FMODE_WRITE; | |
1360 | ||
d4d77629 | 1361 | bdev = blkdev_get_by_path(dev_name, mode, fs_type); |
f55073ff | 1362 | if (IS_ERR(bdev)) |
8bcbbf00 | 1363 | return ERR_CAST(bdev); |
f55073ff SW |
1364 | |
1365 | /* | |
1366 | * once the super is inserted into the list by sget, s_umount | |
1367 | * will protect the lockfs code from trying to start a snapshot | |
1368 | * while we are mounting | |
1369 | */ | |
1370 | mutex_lock(&bdev->bd_fsfreeze_mutex); | |
1371 | if (bdev->bd_fsfreeze_count > 0) { | |
1372 | mutex_unlock(&bdev->bd_fsfreeze_mutex); | |
1373 | error = -EBUSY; | |
1374 | goto error_bdev; | |
1375 | } | |
9249e17f | 1376 | s = sget(fs_type, test_gfs2_super, set_gfs2_super, flags, bdev); |
f55073ff SW |
1377 | mutex_unlock(&bdev->bd_fsfreeze_mutex); |
1378 | error = PTR_ERR(s); | |
1379 | if (IS_ERR(s)) | |
1380 | goto error_bdev; | |
1381 | ||
dfe5b9ad SW |
1382 | if (s->s_root) { |
1383 | /* | |
1384 | * s_umount nests inside bd_mutex during | |
1385 | * __invalidate_device(). blkdev_put() acquires | |
1386 | * bd_mutex and can't be called under s_umount. Drop | |
1387 | * s_umount temporarily. This is safe as we're | |
1388 | * holding an active reference. | |
1389 | */ | |
1390 | up_write(&s->s_umount); | |
d4d77629 | 1391 | blkdev_put(bdev, mode); |
dfe5b9ad SW |
1392 | down_write(&s->s_umount); |
1393 | } | |
8bcbbf00 | 1394 | |
f55073ff SW |
1395 | memset(&args, 0, sizeof(args)); |
1396 | args.ar_quota = GFS2_QUOTA_DEFAULT; | |
1397 | args.ar_data = GFS2_DATA_DEFAULT; | |
5e687eac | 1398 | args.ar_commit = 30; |
3d3c10f2 BM |
1399 | args.ar_statfs_quantum = 30; |
1400 | args.ar_quota_quantum = 60; | |
f55073ff SW |
1401 | args.ar_errors = GFS2_ERRORS_DEFAULT; |
1402 | ||
1403 | error = gfs2_mount_args(&args, data); | |
1404 | if (error) { | |
1405 | printk(KERN_WARNING "GFS2: can't parse mount arguments\n"); | |
8bcbbf00 | 1406 | goto error_super; |
f55073ff SW |
1407 | } |
1408 | ||
1409 | if (s->s_root) { | |
1410 | error = -EBUSY; | |
1411 | if ((flags ^ s->s_flags) & MS_RDONLY) | |
1412 | goto error_super; | |
f55073ff SW |
1413 | } else { |
1414 | char b[BDEVNAME_SIZE]; | |
1415 | ||
f55073ff SW |
1416 | s->s_mode = mode; |
1417 | strlcpy(s->s_id, bdevname(bdev, b), sizeof(s->s_id)); | |
1418 | sb_set_blocksize(s, block_size(bdev)); | |
1419 | error = fill_super(s, &args, flags & MS_SILENT ? 1 : 0); | |
8bcbbf00 AV |
1420 | if (error) |
1421 | goto error_super; | |
f55073ff SW |
1422 | s->s_flags |= MS_ACTIVE; |
1423 | bdev->bd_super = s; | |
1424 | } | |
1425 | ||
1426 | sdp = s->s_fs_info; | |
f55073ff | 1427 | if (args.ar_meta) |
8bcbbf00 | 1428 | return dget(sdp->sd_master_dir); |
f55073ff | 1429 | else |
8bcbbf00 | 1430 | return dget(sdp->sd_root_dir); |
f55073ff SW |
1431 | |
1432 | error_super: | |
1433 | deactivate_locked_super(s); | |
8bcbbf00 | 1434 | return ERR_PTR(error); |
f55073ff | 1435 | error_bdev: |
d4d77629 | 1436 | blkdev_put(bdev, mode); |
8bcbbf00 | 1437 | return ERR_PTR(error); |
f55073ff SW |
1438 | } |
1439 | ||
f6d03139 SW |
1440 | static int set_meta_super(struct super_block *s, void *ptr) |
1441 | { | |
1442 | return -EINVAL; | |
1443 | } | |
1444 | ||
8bcbbf00 AV |
1445 | static struct dentry *gfs2_mount_meta(struct file_system_type *fs_type, |
1446 | int flags, const char *dev_name, void *data) | |
86384605 | 1447 | { |
f6d03139 | 1448 | struct super_block *s; |
003dec89 | 1449 | struct gfs2_sbd *sdp; |
e24977d4 | 1450 | struct path path; |
86384605 | 1451 | int error; |
907b9bce | 1452 | |
e24977d4 | 1453 | error = kern_path(dev_name, LOOKUP_FOLLOW, &path); |
86384605 | 1454 | if (error) { |
9b8df98f SW |
1455 | printk(KERN_WARNING "GFS2: path_lookup on %s returned error %d\n", |
1456 | dev_name, error); | |
8bcbbf00 | 1457 | return ERR_PTR(error); |
86384605 | 1458 | } |
9249e17f | 1459 | s = sget(&gfs2_fs_type, test_gfs2_super, set_meta_super, flags, |
f6d03139 | 1460 | path.dentry->d_inode->i_sb->s_bdev); |
e24977d4 | 1461 | path_put(&path); |
f6d03139 | 1462 | if (IS_ERR(s)) { |
86384605 | 1463 | printk(KERN_WARNING "GFS2: gfs2 mount does not exist\n"); |
8bcbbf00 | 1464 | return ERR_CAST(s); |
86384605 | 1465 | } |
f55073ff SW |
1466 | if ((flags ^ s->s_flags) & MS_RDONLY) { |
1467 | deactivate_locked_super(s); | |
8bcbbf00 | 1468 | return ERR_PTR(-EBUSY); |
f55073ff | 1469 | } |
f6d03139 | 1470 | sdp = s->s_fs_info; |
8bcbbf00 | 1471 | return dget(sdp->sd_master_dir); |
b3b94faa DT |
1472 | } |
1473 | ||
419c93e0 | 1474 | static void gfs2_kill_sb(struct super_block *sb) |
86384605 AD |
1475 | { |
1476 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
88a19ad0 SW |
1477 | |
1478 | if (sdp == NULL) { | |
1479 | kill_block_super(sb); | |
1480 | return; | |
3af165ac | 1481 | } |
88a19ad0 SW |
1482 | |
1483 | gfs2_meta_syncfs(sdp); | |
1484 | dput(sdp->sd_root_dir); | |
1485 | dput(sdp->sd_master_dir); | |
1486 | sdp->sd_root_dir = NULL; | |
1487 | sdp->sd_master_dir = NULL; | |
fefc03bf | 1488 | shrink_dcache_sb(sb); |
88a19ad0 | 1489 | gfs2_delete_debugfs_file(sdp); |
a245769f | 1490 | free_percpu(sdp->sd_lkstats); |
0d515210 | 1491 | kill_block_super(sb); |
86384605 AD |
1492 | } |
1493 | ||
b3b94faa DT |
1494 | struct file_system_type gfs2_fs_type = { |
1495 | .name = "gfs2", | |
1496 | .fs_flags = FS_REQUIRES_DEV, | |
8bcbbf00 | 1497 | .mount = gfs2_mount, |
419c93e0 SW |
1498 | .kill_sb = gfs2_kill_sb, |
1499 | .owner = THIS_MODULE, | |
1500 | }; | |
7f78e035 | 1501 | MODULE_ALIAS_FS("gfs2"); |
419c93e0 SW |
1502 | |
1503 | struct file_system_type gfs2meta_fs_type = { | |
1504 | .name = "gfs2meta", | |
1505 | .fs_flags = FS_REQUIRES_DEV, | |
8bcbbf00 | 1506 | .mount = gfs2_mount_meta, |
b3b94faa DT |
1507 | .owner = THIS_MODULE, |
1508 | }; | |
7f78e035 | 1509 | MODULE_ALIAS_FS("gfs2meta"); |