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 | ||
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> | |
86384605 AD |
17 | #include <linux/namei.h> |
18 | #include <linux/mount.h> | |
5c676f6d | 19 | #include <linux/gfs2_ondisk.h> |
7d308590 | 20 | #include <linux/lm_interface.h> |
b3b94faa DT |
21 | |
22 | #include "gfs2.h" | |
5c676f6d | 23 | #include "incore.h" |
da6dd40d | 24 | #include "bmap.h" |
b3b94faa DT |
25 | #include "daemon.h" |
26 | #include "glock.h" | |
27 | #include "glops.h" | |
28 | #include "inode.h" | |
b3b94faa | 29 | #include "mount.h" |
b3b94faa | 30 | #include "ops_fstype.h" |
ca5a939b | 31 | #include "ops_dentry.h" |
b3b94faa DT |
32 | #include "ops_super.h" |
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" |
b3b94faa DT |
39 | |
40 | #define DO 0 | |
41 | #define UNDO 1 | |
42 | ||
43 | static struct gfs2_sbd *init_sbd(struct super_block *sb) | |
44 | { | |
45 | struct gfs2_sbd *sdp; | |
b3b94faa | 46 | |
85d1da67 | 47 | sdp = kzalloc(sizeof(struct gfs2_sbd), GFP_KERNEL); |
b3b94faa DT |
48 | if (!sdp) |
49 | return NULL; | |
50 | ||
5c676f6d | 51 | sb->s_fs_info = sdp; |
b3b94faa DT |
52 | sdp->sd_vfs = sb; |
53 | ||
54 | gfs2_tune_init(&sdp->sd_tune); | |
55 | ||
b3b94faa DT |
56 | INIT_LIST_HEAD(&sdp->sd_reclaim_list); |
57 | spin_lock_init(&sdp->sd_reclaim_lock); | |
58 | init_waitqueue_head(&sdp->sd_reclaim_wq); | |
b3b94faa | 59 | |
f55ab26a | 60 | mutex_init(&sdp->sd_inum_mutex); |
b3b94faa | 61 | spin_lock_init(&sdp->sd_statfs_spin); |
b3b94faa DT |
62 | |
63 | spin_lock_init(&sdp->sd_rindex_spin); | |
f55ab26a | 64 | mutex_init(&sdp->sd_rindex_mutex); |
b3b94faa DT |
65 | INIT_LIST_HEAD(&sdp->sd_rindex_list); |
66 | INIT_LIST_HEAD(&sdp->sd_rindex_mru_list); | |
b3b94faa DT |
67 | |
68 | INIT_LIST_HEAD(&sdp->sd_jindex_list); | |
69 | spin_lock_init(&sdp->sd_jindex_spin); | |
f55ab26a | 70 | mutex_init(&sdp->sd_jindex_mutex); |
b3b94faa | 71 | |
b3b94faa DT |
72 | INIT_LIST_HEAD(&sdp->sd_quota_list); |
73 | spin_lock_init(&sdp->sd_quota_spin); | |
f55ab26a | 74 | mutex_init(&sdp->sd_quota_mutex); |
b3b94faa DT |
75 | |
76 | spin_lock_init(&sdp->sd_log_lock); | |
b3b94faa | 77 | |
b3b94faa DT |
78 | INIT_LIST_HEAD(&sdp->sd_log_le_buf); |
79 | INIT_LIST_HEAD(&sdp->sd_log_le_revoke); | |
80 | INIT_LIST_HEAD(&sdp->sd_log_le_rg); | |
81 | INIT_LIST_HEAD(&sdp->sd_log_le_databuf); | |
d7b616e2 | 82 | INIT_LIST_HEAD(&sdp->sd_log_le_ordered); |
b3b94faa | 83 | |
71b86f56 | 84 | mutex_init(&sdp->sd_log_reserve_mutex); |
b3b94faa DT |
85 | INIT_LIST_HEAD(&sdp->sd_ail1_list); |
86 | INIT_LIST_HEAD(&sdp->sd_ail2_list); | |
87 | ||
484adff8 | 88 | init_rwsem(&sdp->sd_log_flush_lock); |
16615be1 SW |
89 | atomic_set(&sdp->sd_log_in_flight, 0); |
90 | init_waitqueue_head(&sdp->sd_log_flush_wait); | |
b3b94faa DT |
91 | |
92 | INIT_LIST_HEAD(&sdp->sd_revoke_list); | |
93 | ||
f55ab26a | 94 | mutex_init(&sdp->sd_freeze_lock); |
b3b94faa DT |
95 | |
96 | return sdp; | |
97 | } | |
98 | ||
419c93e0 | 99 | static void init_vfs(struct super_block *sb, unsigned noatime) |
b3b94faa | 100 | { |
419c93e0 | 101 | struct gfs2_sbd *sdp = sb->s_fs_info; |
b3b94faa DT |
102 | |
103 | sb->s_magic = GFS2_MAGIC; | |
104 | sb->s_op = &gfs2_super_ops; | |
105 | sb->s_export_op = &gfs2_export_ops; | |
4bd91ba1 | 106 | sb->s_time_gran = 1; |
b3b94faa DT |
107 | sb->s_maxbytes = MAX_LFS_FILESIZE; |
108 | ||
109 | if (sb->s_flags & (MS_NOATIME | MS_NODIRATIME)) | |
419c93e0 | 110 | set_bit(noatime, &sdp->sd_flags); |
b3b94faa DT |
111 | |
112 | /* Don't let the VFS update atimes. GFS2 handles this itself. */ | |
113 | sb->s_flags |= MS_NOATIME | MS_NODIRATIME; | |
b3b94faa DT |
114 | } |
115 | ||
116 | static int init_names(struct gfs2_sbd *sdp, int silent) | |
117 | { | |
b3b94faa DT |
118 | char *proto, *table; |
119 | int error = 0; | |
120 | ||
121 | proto = sdp->sd_args.ar_lockproto; | |
122 | table = sdp->sd_args.ar_locktable; | |
123 | ||
124 | /* Try to autodetect */ | |
125 | ||
126 | if (!proto[0] || !table[0]) { | |
bb8d8a6f SW |
127 | error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift); |
128 | if (error) | |
129 | return error; | |
3cf1e7be SW |
130 | |
131 | error = gfs2_check_sb(sdp, &sdp->sd_sb, silent); | |
b3b94faa DT |
132 | if (error) |
133 | goto out; | |
134 | ||
135 | if (!proto[0]) | |
3cf1e7be | 136 | proto = sdp->sd_sb.sb_lockproto; |
b3b94faa | 137 | if (!table[0]) |
3cf1e7be | 138 | table = sdp->sd_sb.sb_locktable; |
b3b94faa DT |
139 | } |
140 | ||
141 | if (!table[0]) | |
142 | table = sdp->sd_vfs->s_id; | |
143 | ||
00377d8e JD |
144 | strlcpy(sdp->sd_proto_name, proto, GFS2_FSNAME_LEN); |
145 | strlcpy(sdp->sd_table_name, table, GFS2_FSNAME_LEN); | |
b3b94faa | 146 | |
5d35e31f DC |
147 | table = sdp->sd_table_name; |
148 | while ((table = strchr(table, '/'))) | |
b35997d4 RP |
149 | *table = '_'; |
150 | ||
a91ea69f | 151 | out: |
b3b94faa DT |
152 | return error; |
153 | } | |
154 | ||
155 | static int init_locking(struct gfs2_sbd *sdp, struct gfs2_holder *mount_gh, | |
156 | int undo) | |
157 | { | |
158 | struct task_struct *p; | |
159 | int error = 0; | |
160 | ||
161 | if (undo) | |
162 | goto fail_trans; | |
163 | ||
b3b94faa DT |
164 | for (sdp->sd_glockd_num = 0; |
165 | sdp->sd_glockd_num < sdp->sd_args.ar_num_glockd; | |
166 | sdp->sd_glockd_num++) { | |
167 | p = kthread_run(gfs2_glockd, sdp, "gfs2_glockd"); | |
168 | error = IS_ERR(p); | |
169 | if (error) { | |
170 | fs_err(sdp, "can't start glockd thread: %d\n", error); | |
171 | goto fail; | |
172 | } | |
173 | sdp->sd_glockd_process[sdp->sd_glockd_num] = p; | |
174 | } | |
175 | ||
176 | error = gfs2_glock_nq_num(sdp, | |
177 | GFS2_MOUNT_LOCK, &gfs2_nondisk_glops, | |
178 | LM_ST_EXCLUSIVE, LM_FLAG_NOEXP | GL_NOCACHE, | |
179 | mount_gh); | |
180 | if (error) { | |
181 | fs_err(sdp, "can't acquire mount glock: %d\n", error); | |
182 | goto fail; | |
183 | } | |
184 | ||
185 | error = gfs2_glock_nq_num(sdp, | |
186 | GFS2_LIVE_LOCK, &gfs2_nondisk_glops, | |
187 | LM_ST_SHARED, | |
579b78a4 | 188 | LM_FLAG_NOEXP | GL_EXACT, |
b3b94faa DT |
189 | &sdp->sd_live_gh); |
190 | if (error) { | |
191 | fs_err(sdp, "can't acquire live glock: %d\n", error); | |
192 | goto fail_mount; | |
193 | } | |
194 | ||
195 | error = gfs2_glock_get(sdp, GFS2_RENAME_LOCK, &gfs2_nondisk_glops, | |
196 | CREATE, &sdp->sd_rename_gl); | |
197 | if (error) { | |
198 | fs_err(sdp, "can't create rename glock: %d\n", error); | |
199 | goto fail_live; | |
200 | } | |
201 | ||
202 | error = gfs2_glock_get(sdp, GFS2_TRANS_LOCK, &gfs2_trans_glops, | |
203 | CREATE, &sdp->sd_trans_gl); | |
204 | if (error) { | |
205 | fs_err(sdp, "can't create transaction glock: %d\n", error); | |
206 | goto fail_rename; | |
207 | } | |
208 | set_bit(GLF_STICKY, &sdp->sd_trans_gl->gl_flags); | |
209 | ||
210 | return 0; | |
211 | ||
feaa7bba | 212 | fail_trans: |
b3b94faa | 213 | gfs2_glock_put(sdp->sd_trans_gl); |
feaa7bba | 214 | fail_rename: |
b3b94faa | 215 | gfs2_glock_put(sdp->sd_rename_gl); |
feaa7bba | 216 | fail_live: |
b3b94faa | 217 | gfs2_glock_dq_uninit(&sdp->sd_live_gh); |
feaa7bba | 218 | fail_mount: |
b3b94faa | 219 | gfs2_glock_dq_uninit(mount_gh); |
feaa7bba | 220 | fail: |
b3b94faa DT |
221 | while (sdp->sd_glockd_num--) |
222 | kthread_stop(sdp->sd_glockd_process[sdp->sd_glockd_num]); | |
223 | ||
b3b94faa DT |
224 | return error; |
225 | } | |
226 | ||
dbb7cae2 SW |
227 | static inline struct inode *gfs2_lookup_root(struct super_block *sb, |
228 | u64 no_addr) | |
f42faf4f | 229 | { |
7a9f53b3 | 230 | return gfs2_inode_lookup(sb, DT_DIR, no_addr, 0, 0); |
f42faf4f SW |
231 | } |
232 | ||
b3b94faa DT |
233 | static int init_sb(struct gfs2_sbd *sdp, int silent, int undo) |
234 | { | |
235 | struct super_block *sb = sdp->sd_vfs; | |
236 | struct gfs2_holder sb_gh; | |
dbb7cae2 | 237 | u64 no_addr; |
f42faf4f | 238 | struct inode *inode; |
b3b94faa DT |
239 | int error = 0; |
240 | ||
241 | if (undo) { | |
88721877 RC |
242 | if (sb->s_root) { |
243 | dput(sb->s_root); | |
244 | sb->s_root = NULL; | |
245 | } | |
b3b94faa DT |
246 | return 0; |
247 | } | |
907b9bce | 248 | |
feaa7bba | 249 | error = gfs2_glock_nq_num(sdp, GFS2_SB_LOCK, &gfs2_meta_glops, |
b3b94faa DT |
250 | LM_ST_SHARED, 0, &sb_gh); |
251 | if (error) { | |
252 | fs_err(sdp, "can't acquire superblock glock: %d\n", error); | |
253 | return error; | |
254 | } | |
255 | ||
256 | error = gfs2_read_sb(sdp, sb_gh.gh_gl, silent); | |
257 | if (error) { | |
258 | fs_err(sdp, "can't read superblock: %d\n", error); | |
259 | goto out; | |
260 | } | |
261 | ||
262 | /* Set up the buffer cache and SB for real */ | |
b3b94faa | 263 | if (sdp->sd_sb.sb_bsize < bdev_hardsect_size(sb->s_bdev)) { |
419c93e0 | 264 | error = -EINVAL; |
b3b94faa DT |
265 | fs_err(sdp, "FS block size (%u) is too small for device " |
266 | "block size (%u)\n", | |
267 | sdp->sd_sb.sb_bsize, bdev_hardsect_size(sb->s_bdev)); | |
268 | goto out; | |
269 | } | |
270 | if (sdp->sd_sb.sb_bsize > PAGE_SIZE) { | |
419c93e0 | 271 | error = -EINVAL; |
b3b94faa DT |
272 | fs_err(sdp, "FS block size (%u) is too big for machine " |
273 | "page size (%u)\n", | |
274 | sdp->sd_sb.sb_bsize, (unsigned int)PAGE_SIZE); | |
275 | goto out; | |
276 | } | |
b3b94faa DT |
277 | sb_set_blocksize(sb, sdp->sd_sb.sb_bsize); |
278 | ||
f42faf4f | 279 | /* Get the root inode */ |
dbb7cae2 | 280 | no_addr = sdp->sd_sb.sb_root_dir.no_addr; |
419c93e0 | 281 | if (sb->s_type == &gfs2meta_fs_type) |
dbb7cae2 SW |
282 | no_addr = sdp->sd_sb.sb_master_dir.no_addr; |
283 | inode = gfs2_lookup_root(sb, no_addr); | |
c9fd4307 SW |
284 | if (IS_ERR(inode)) { |
285 | error = PTR_ERR(inode); | |
f42faf4f SW |
286 | fs_err(sdp, "can't read in root inode: %d\n", error); |
287 | goto out; | |
288 | } | |
b3b94faa | 289 | |
f42faf4f SW |
290 | sb->s_root = d_alloc_root(inode); |
291 | if (!sb->s_root) { | |
292 | fs_err(sdp, "can't get root dentry\n"); | |
293 | error = -ENOMEM; | |
c9fd4307 | 294 | iput(inode); |
34eaae39 DC |
295 | } else |
296 | sb->s_root->d_op = &gfs2_dops; | |
297 | ||
f42faf4f | 298 | out: |
b3b94faa | 299 | gfs2_glock_dq_uninit(&sb_gh); |
b3b94faa DT |
300 | return error; |
301 | } | |
302 | ||
da6dd40d BP |
303 | /** |
304 | * map_journal_extents - create a reusable "extent" mapping from all logical | |
305 | * blocks to all physical blocks for the given journal. This will save | |
306 | * us time when writing journal blocks. Most journals will have only one | |
307 | * extent that maps all their logical blocks. That's because gfs2.mkfs | |
308 | * arranges the journal blocks sequentially to maximize performance. | |
309 | * So the extent would map the first block for the entire file length. | |
310 | * However, gfs2_jadd can happen while file activity is happening, so | |
311 | * those journals may not be sequential. Less likely is the case where | |
312 | * the users created their own journals by mounting the metafs and | |
313 | * laying it out. But it's still possible. These journals might have | |
314 | * several extents. | |
315 | * | |
316 | * TODO: This should be done in bigger chunks rather than one block at a time, | |
317 | * but since it's only done at mount time, I'm not worried about the | |
318 | * time it takes. | |
319 | */ | |
320 | static int map_journal_extents(struct gfs2_sbd *sdp) | |
321 | { | |
322 | struct gfs2_jdesc *jd = sdp->sd_jdesc; | |
323 | unsigned int lb; | |
324 | u64 db, prev_db; /* logical block, disk block, prev disk block */ | |
325 | struct gfs2_inode *ip = GFS2_I(jd->jd_inode); | |
326 | struct gfs2_journal_extent *jext = NULL; | |
327 | struct buffer_head bh; | |
328 | int rc = 0; | |
329 | ||
da6dd40d BP |
330 | prev_db = 0; |
331 | ||
fa3742fa | 332 | for (lb = 0; lb < ip->i_di.di_size >> sdp->sd_sb.sb_bsize_shift; lb++) { |
da6dd40d BP |
333 | bh.b_state = 0; |
334 | bh.b_blocknr = 0; | |
335 | bh.b_size = 1 << ip->i_inode.i_blkbits; | |
336 | rc = gfs2_block_map(jd->jd_inode, lb, &bh, 0); | |
337 | db = bh.b_blocknr; | |
338 | if (rc || !db) { | |
339 | printk(KERN_INFO "GFS2 journal mapping error %d: lb=" | |
340 | "%u db=%llu\n", rc, lb, (unsigned long long)db); | |
341 | break; | |
342 | } | |
343 | if (!prev_db || db != prev_db + 1) { | |
344 | jext = kzalloc(sizeof(struct gfs2_journal_extent), | |
345 | GFP_KERNEL); | |
346 | if (!jext) { | |
347 | printk(KERN_INFO "GFS2 error: out of memory " | |
348 | "mapping journal extents.\n"); | |
349 | rc = -ENOMEM; | |
350 | break; | |
351 | } | |
352 | jext->dblock = db; | |
353 | jext->lblock = lb; | |
354 | jext->blocks = 1; | |
355 | list_add_tail(&jext->extent_list, &jd->extent_list); | |
356 | } else { | |
357 | jext->blocks++; | |
358 | } | |
359 | prev_db = db; | |
360 | } | |
361 | return rc; | |
362 | } | |
363 | ||
da755fdb SW |
364 | static void gfs2_lm_others_may_mount(struct gfs2_sbd *sdp) |
365 | { | |
048bca22 SW |
366 | if (!sdp->sd_lockstruct.ls_ops->lm_others_may_mount) |
367 | return; | |
da755fdb SW |
368 | if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) |
369 | sdp->sd_lockstruct.ls_ops->lm_others_may_mount( | |
370 | sdp->sd_lockstruct.ls_lockspace); | |
371 | } | |
372 | ||
b3b94faa DT |
373 | static int init_journal(struct gfs2_sbd *sdp, int undo) |
374 | { | |
375 | struct gfs2_holder ji_gh; | |
376 | struct task_struct *p; | |
5c676f6d | 377 | struct gfs2_inode *ip; |
b3b94faa DT |
378 | int jindex = 1; |
379 | int error = 0; | |
380 | ||
381 | if (undo) { | |
382 | jindex = 0; | |
383 | goto fail_recoverd; | |
384 | } | |
385 | ||
c752666c SW |
386 | sdp->sd_jindex = gfs2_lookup_simple(sdp->sd_master_dir, "jindex"); |
387 | if (IS_ERR(sdp->sd_jindex)) { | |
b3b94faa | 388 | fs_err(sdp, "can't lookup journal index: %d\n", error); |
c752666c | 389 | return PTR_ERR(sdp->sd_jindex); |
b3b94faa | 390 | } |
feaa7bba | 391 | ip = GFS2_I(sdp->sd_jindex); |
5c676f6d | 392 | set_bit(GLF_STICKY, &ip->i_gl->gl_flags); |
b3b94faa DT |
393 | |
394 | /* Load in the journal index special file */ | |
395 | ||
396 | error = gfs2_jindex_hold(sdp, &ji_gh); | |
397 | if (error) { | |
398 | fs_err(sdp, "can't read journal index: %d\n", error); | |
399 | goto fail; | |
400 | } | |
401 | ||
402 | error = -EINVAL; | |
403 | if (!gfs2_jindex_size(sdp)) { | |
404 | fs_err(sdp, "no journals!\n"); | |
907b9bce | 405 | goto fail_jindex; |
b3b94faa DT |
406 | } |
407 | ||
408 | if (sdp->sd_args.ar_spectator) { | |
409 | sdp->sd_jdesc = gfs2_jdesc_find(sdp, 0); | |
fd041f0b | 410 | atomic_set(&sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks); |
b3b94faa DT |
411 | } else { |
412 | if (sdp->sd_lockstruct.ls_jid >= gfs2_jindex_size(sdp)) { | |
413 | fs_err(sdp, "can't mount journal #%u\n", | |
414 | sdp->sd_lockstruct.ls_jid); | |
415 | fs_err(sdp, "there are only %u journals (0 - %u)\n", | |
416 | gfs2_jindex_size(sdp), | |
417 | gfs2_jindex_size(sdp) - 1); | |
418 | goto fail_jindex; | |
419 | } | |
420 | sdp->sd_jdesc = gfs2_jdesc_find(sdp, sdp->sd_lockstruct.ls_jid); | |
421 | ||
feaa7bba | 422 | error = gfs2_glock_nq_num(sdp, sdp->sd_lockstruct.ls_jid, |
b3b94faa DT |
423 | &gfs2_journal_glops, |
424 | LM_ST_EXCLUSIVE, LM_FLAG_NOEXP, | |
425 | &sdp->sd_journal_gh); | |
426 | if (error) { | |
427 | fs_err(sdp, "can't acquire journal glock: %d\n", error); | |
428 | goto fail_jindex; | |
429 | } | |
430 | ||
feaa7bba SW |
431 | ip = GFS2_I(sdp->sd_jdesc->jd_inode); |
432 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, | |
75be73a8 | 433 | LM_FLAG_NOEXP | GL_EXACT | GL_NOCACHE, |
b3b94faa DT |
434 | &sdp->sd_jinode_gh); |
435 | if (error) { | |
436 | fs_err(sdp, "can't acquire journal inode glock: %d\n", | |
437 | error); | |
438 | goto fail_journal_gh; | |
439 | } | |
440 | ||
441 | error = gfs2_jdesc_check(sdp->sd_jdesc); | |
442 | if (error) { | |
443 | fs_err(sdp, "my journal (%u) is bad: %d\n", | |
444 | sdp->sd_jdesc->jd_jid, error); | |
445 | goto fail_jinode_gh; | |
446 | } | |
fd041f0b | 447 | atomic_set(&sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks); |
da6dd40d BP |
448 | |
449 | /* Map the extents for this journal's blocks */ | |
450 | map_journal_extents(sdp); | |
b3b94faa DT |
451 | } |
452 | ||
453 | if (sdp->sd_lockstruct.ls_first) { | |
454 | unsigned int x; | |
455 | for (x = 0; x < sdp->sd_journals; x++) { | |
c63e31c2 | 456 | error = gfs2_recover_journal(gfs2_jdesc_find(sdp, x)); |
b3b94faa DT |
457 | if (error) { |
458 | fs_err(sdp, "error recovering journal %u: %d\n", | |
459 | x, error); | |
460 | goto fail_jinode_gh; | |
461 | } | |
462 | } | |
463 | ||
464 | gfs2_lm_others_may_mount(sdp); | |
465 | } else if (!sdp->sd_args.ar_spectator) { | |
c63e31c2 | 466 | error = gfs2_recover_journal(sdp->sd_jdesc); |
b3b94faa DT |
467 | if (error) { |
468 | fs_err(sdp, "error recovering my journal: %d\n", error); | |
469 | goto fail_jinode_gh; | |
470 | } | |
471 | } | |
472 | ||
473 | set_bit(SDF_JOURNAL_CHECKED, &sdp->sd_flags); | |
474 | gfs2_glock_dq_uninit(&ji_gh); | |
475 | jindex = 0; | |
476 | ||
b3b94faa DT |
477 | p = kthread_run(gfs2_recoverd, sdp, "gfs2_recoverd"); |
478 | error = IS_ERR(p); | |
479 | if (error) { | |
480 | fs_err(sdp, "can't start recoverd thread: %d\n", error); | |
481 | goto fail_jinode_gh; | |
482 | } | |
483 | sdp->sd_recoverd_process = p; | |
484 | ||
485 | return 0; | |
486 | ||
a91ea69f | 487 | fail_recoverd: |
b3b94faa | 488 | kthread_stop(sdp->sd_recoverd_process); |
a91ea69f | 489 | fail_jinode_gh: |
b3b94faa DT |
490 | if (!sdp->sd_args.ar_spectator) |
491 | gfs2_glock_dq_uninit(&sdp->sd_jinode_gh); | |
a91ea69f | 492 | fail_journal_gh: |
b3b94faa DT |
493 | if (!sdp->sd_args.ar_spectator) |
494 | gfs2_glock_dq_uninit(&sdp->sd_journal_gh); | |
a91ea69f | 495 | fail_jindex: |
b3b94faa DT |
496 | gfs2_jindex_free(sdp); |
497 | if (jindex) | |
498 | gfs2_glock_dq_uninit(&ji_gh); | |
a91ea69f | 499 | fail: |
f42faf4f | 500 | iput(sdp->sd_jindex); |
b3b94faa DT |
501 | return error; |
502 | } | |
503 | ||
b3b94faa DT |
504 | |
505 | static int init_inodes(struct gfs2_sbd *sdp, int undo) | |
506 | { | |
b3b94faa | 507 | int error = 0; |
5c676f6d | 508 | struct gfs2_inode *ip; |
c9fd4307 | 509 | struct inode *inode; |
b3b94faa DT |
510 | |
511 | if (undo) | |
f42faf4f SW |
512 | goto fail_qinode; |
513 | ||
dbb7cae2 | 514 | inode = gfs2_lookup_root(sdp->sd_vfs, sdp->sd_sb.sb_master_dir.no_addr); |
c9fd4307 SW |
515 | if (IS_ERR(inode)) { |
516 | error = PTR_ERR(inode); | |
f42faf4f SW |
517 | fs_err(sdp, "can't read in master directory: %d\n", error); |
518 | goto fail; | |
519 | } | |
c9fd4307 | 520 | sdp->sd_master_dir = inode; |
f42faf4f SW |
521 | |
522 | error = init_journal(sdp, undo); | |
523 | if (error) | |
524 | goto fail_master; | |
b3b94faa DT |
525 | |
526 | /* Read in the master inode number inode */ | |
c752666c SW |
527 | sdp->sd_inum_inode = gfs2_lookup_simple(sdp->sd_master_dir, "inum"); |
528 | if (IS_ERR(sdp->sd_inum_inode)) { | |
529 | error = PTR_ERR(sdp->sd_inum_inode); | |
b3b94faa | 530 | fs_err(sdp, "can't read in inum inode: %d\n", error); |
f42faf4f | 531 | goto fail_journal; |
b3b94faa DT |
532 | } |
533 | ||
f42faf4f | 534 | |
b3b94faa | 535 | /* Read in the master statfs inode */ |
c752666c SW |
536 | sdp->sd_statfs_inode = gfs2_lookup_simple(sdp->sd_master_dir, "statfs"); |
537 | if (IS_ERR(sdp->sd_statfs_inode)) { | |
538 | error = PTR_ERR(sdp->sd_statfs_inode); | |
b3b94faa | 539 | fs_err(sdp, "can't read in statfs inode: %d\n", error); |
f42faf4f | 540 | goto fail_inum; |
b3b94faa DT |
541 | } |
542 | ||
543 | /* Read in the resource index inode */ | |
c752666c SW |
544 | sdp->sd_rindex = gfs2_lookup_simple(sdp->sd_master_dir, "rindex"); |
545 | if (IS_ERR(sdp->sd_rindex)) { | |
546 | error = PTR_ERR(sdp->sd_rindex); | |
b3b94faa DT |
547 | fs_err(sdp, "can't get resource index inode: %d\n", error); |
548 | goto fail_statfs; | |
549 | } | |
feaa7bba | 550 | ip = GFS2_I(sdp->sd_rindex); |
5c676f6d | 551 | set_bit(GLF_STICKY, &ip->i_gl->gl_flags); |
cf45b752 | 552 | sdp->sd_rindex_uptodate = 0; |
b3b94faa DT |
553 | |
554 | /* Read in the quota inode */ | |
c752666c SW |
555 | sdp->sd_quota_inode = gfs2_lookup_simple(sdp->sd_master_dir, "quota"); |
556 | if (IS_ERR(sdp->sd_quota_inode)) { | |
557 | error = PTR_ERR(sdp->sd_quota_inode); | |
b3b94faa DT |
558 | fs_err(sdp, "can't get quota file inode: %d\n", error); |
559 | goto fail_rindex; | |
560 | } | |
b3b94faa DT |
561 | return 0; |
562 | ||
f42faf4f SW |
563 | fail_qinode: |
564 | iput(sdp->sd_quota_inode); | |
f42faf4f | 565 | fail_rindex: |
b3b94faa | 566 | gfs2_clear_rgrpd(sdp); |
f42faf4f | 567 | iput(sdp->sd_rindex); |
f42faf4f SW |
568 | fail_statfs: |
569 | iput(sdp->sd_statfs_inode); | |
f42faf4f SW |
570 | fail_inum: |
571 | iput(sdp->sd_inum_inode); | |
572 | fail_journal: | |
573 | init_journal(sdp, UNDO); | |
574 | fail_master: | |
575 | iput(sdp->sd_master_dir); | |
576 | fail: | |
b3b94faa DT |
577 | return error; |
578 | } | |
579 | ||
580 | static int init_per_node(struct gfs2_sbd *sdp, int undo) | |
581 | { | |
f42faf4f | 582 | struct inode *pn = NULL; |
b3b94faa DT |
583 | char buf[30]; |
584 | int error = 0; | |
5c676f6d | 585 | struct gfs2_inode *ip; |
b3b94faa DT |
586 | |
587 | if (sdp->sd_args.ar_spectator) | |
588 | return 0; | |
589 | ||
590 | if (undo) | |
591 | goto fail_qc_gh; | |
592 | ||
c752666c SW |
593 | pn = gfs2_lookup_simple(sdp->sd_master_dir, "per_node"); |
594 | if (IS_ERR(pn)) { | |
595 | error = PTR_ERR(pn); | |
b3b94faa DT |
596 | fs_err(sdp, "can't find per_node directory: %d\n", error); |
597 | return error; | |
598 | } | |
599 | ||
600 | sprintf(buf, "inum_range%u", sdp->sd_jdesc->jd_jid); | |
c752666c SW |
601 | sdp->sd_ir_inode = gfs2_lookup_simple(pn, buf); |
602 | if (IS_ERR(sdp->sd_ir_inode)) { | |
603 | error = PTR_ERR(sdp->sd_ir_inode); | |
b3b94faa DT |
604 | fs_err(sdp, "can't find local \"ir\" file: %d\n", error); |
605 | goto fail; | |
606 | } | |
607 | ||
608 | sprintf(buf, "statfs_change%u", sdp->sd_jdesc->jd_jid); | |
c752666c SW |
609 | sdp->sd_sc_inode = gfs2_lookup_simple(pn, buf); |
610 | if (IS_ERR(sdp->sd_sc_inode)) { | |
611 | error = PTR_ERR(sdp->sd_sc_inode); | |
b3b94faa DT |
612 | fs_err(sdp, "can't find local \"sc\" file: %d\n", error); |
613 | goto fail_ir_i; | |
614 | } | |
615 | ||
b3b94faa | 616 | sprintf(buf, "quota_change%u", sdp->sd_jdesc->jd_jid); |
c752666c SW |
617 | sdp->sd_qc_inode = gfs2_lookup_simple(pn, buf); |
618 | if (IS_ERR(sdp->sd_qc_inode)) { | |
619 | error = PTR_ERR(sdp->sd_qc_inode); | |
b3b94faa DT |
620 | fs_err(sdp, "can't find local \"qc\" file: %d\n", error); |
621 | goto fail_ut_i; | |
622 | } | |
623 | ||
f42faf4f | 624 | iput(pn); |
b3b94faa DT |
625 | pn = NULL; |
626 | ||
feaa7bba | 627 | ip = GFS2_I(sdp->sd_ir_inode); |
5c676f6d | 628 | error = gfs2_glock_nq_init(ip->i_gl, |
579b78a4 | 629 | LM_ST_EXCLUSIVE, 0, |
b3b94faa DT |
630 | &sdp->sd_ir_gh); |
631 | if (error) { | |
632 | fs_err(sdp, "can't lock local \"ir\" file: %d\n", error); | |
633 | goto fail_qc_i; | |
634 | } | |
635 | ||
feaa7bba | 636 | ip = GFS2_I(sdp->sd_sc_inode); |
5c676f6d | 637 | error = gfs2_glock_nq_init(ip->i_gl, |
579b78a4 | 638 | LM_ST_EXCLUSIVE, 0, |
b3b94faa DT |
639 | &sdp->sd_sc_gh); |
640 | if (error) { | |
641 | fs_err(sdp, "can't lock local \"sc\" file: %d\n", error); | |
642 | goto fail_ir_gh; | |
643 | } | |
644 | ||
feaa7bba | 645 | ip = GFS2_I(sdp->sd_qc_inode); |
5c676f6d | 646 | error = gfs2_glock_nq_init(ip->i_gl, |
579b78a4 | 647 | LM_ST_EXCLUSIVE, 0, |
b3b94faa DT |
648 | &sdp->sd_qc_gh); |
649 | if (error) { | |
650 | fs_err(sdp, "can't lock local \"qc\" file: %d\n", error); | |
651 | goto fail_ut_gh; | |
652 | } | |
653 | ||
654 | return 0; | |
655 | ||
a91ea69f | 656 | fail_qc_gh: |
b3b94faa | 657 | gfs2_glock_dq_uninit(&sdp->sd_qc_gh); |
a91ea69f | 658 | fail_ut_gh: |
b3b94faa | 659 | gfs2_glock_dq_uninit(&sdp->sd_sc_gh); |
a91ea69f | 660 | fail_ir_gh: |
b3b94faa | 661 | gfs2_glock_dq_uninit(&sdp->sd_ir_gh); |
a91ea69f | 662 | fail_qc_i: |
f42faf4f | 663 | iput(sdp->sd_qc_inode); |
a91ea69f | 664 | fail_ut_i: |
f42faf4f | 665 | iput(sdp->sd_sc_inode); |
a91ea69f | 666 | fail_ir_i: |
f42faf4f | 667 | iput(sdp->sd_ir_inode); |
a91ea69f | 668 | fail: |
b3b94faa | 669 | if (pn) |
f42faf4f | 670 | iput(pn); |
b3b94faa DT |
671 | return error; |
672 | } | |
673 | ||
674 | static int init_threads(struct gfs2_sbd *sdp, int undo) | |
675 | { | |
676 | struct task_struct *p; | |
677 | int error = 0; | |
678 | ||
679 | if (undo) | |
feaa7bba | 680 | goto fail_quotad; |
b3b94faa DT |
681 | |
682 | sdp->sd_log_flush_time = jiffies; | |
683 | sdp->sd_jindex_refresh_time = jiffies; | |
684 | ||
685 | p = kthread_run(gfs2_logd, sdp, "gfs2_logd"); | |
686 | error = IS_ERR(p); | |
687 | if (error) { | |
688 | fs_err(sdp, "can't start logd thread: %d\n", error); | |
689 | return error; | |
690 | } | |
691 | sdp->sd_logd_process = p; | |
692 | ||
693 | sdp->sd_statfs_sync_time = jiffies; | |
694 | sdp->sd_quota_sync_time = jiffies; | |
695 | ||
696 | p = kthread_run(gfs2_quotad, sdp, "gfs2_quotad"); | |
697 | error = IS_ERR(p); | |
698 | if (error) { | |
699 | fs_err(sdp, "can't start quotad thread: %d\n", error); | |
700 | goto fail; | |
701 | } | |
702 | sdp->sd_quotad_process = p; | |
703 | ||
b3b94faa DT |
704 | return 0; |
705 | ||
b3b94faa | 706 | |
feaa7bba | 707 | fail_quotad: |
b3b94faa | 708 | kthread_stop(sdp->sd_quotad_process); |
feaa7bba | 709 | fail: |
b3b94faa | 710 | kthread_stop(sdp->sd_logd_process); |
b3b94faa DT |
711 | return error; |
712 | } | |
da755fdb SW |
713 | |
714 | /** | |
715 | * gfs2_lm_mount - mount a locking protocol | |
716 | * @sdp: the filesystem | |
717 | * @args: mount arguements | |
718 | * @silent: if 1, don't complain if the FS isn't a GFS2 fs | |
719 | * | |
720 | * Returns: errno | |
721 | */ | |
722 | ||
723 | static int gfs2_lm_mount(struct gfs2_sbd *sdp, int silent) | |
724 | { | |
725 | char *proto = sdp->sd_proto_name; | |
726 | char *table = sdp->sd_table_name; | |
58e9fee1 | 727 | int flags = LM_MFLAG_CONV_NODROP; |
da755fdb SW |
728 | int error; |
729 | ||
730 | if (sdp->sd_args.ar_spectator) | |
731 | flags |= LM_MFLAG_SPECTATOR; | |
732 | ||
733 | fs_info(sdp, "Trying to join cluster \"%s\", \"%s\"\n", proto, table); | |
734 | ||
735 | error = gfs2_mount_lockproto(proto, table, sdp->sd_args.ar_hostdata, | |
736 | gfs2_glock_cb, sdp, | |
737 | GFS2_MIN_LVB_SIZE, flags, | |
738 | &sdp->sd_lockstruct, &sdp->sd_kobj); | |
739 | if (error) { | |
740 | fs_info(sdp, "can't mount proto=%s, table=%s, hostdata=%s\n", | |
741 | proto, table, sdp->sd_args.ar_hostdata); | |
742 | goto out; | |
743 | } | |
744 | ||
048bca22 | 745 | if (gfs2_assert_warn(sdp, sdp->sd_lockstruct.ls_ops) || |
da755fdb SW |
746 | gfs2_assert_warn(sdp, sdp->sd_lockstruct.ls_lvb_size >= |
747 | GFS2_MIN_LVB_SIZE)) { | |
748 | gfs2_unmount_lockproto(&sdp->sd_lockstruct); | |
749 | goto out; | |
750 | } | |
751 | ||
752 | if (sdp->sd_args.ar_spectator) | |
753 | snprintf(sdp->sd_fsname, GFS2_FSNAME_LEN, "%s.s", table); | |
754 | else | |
755 | snprintf(sdp->sd_fsname, GFS2_FSNAME_LEN, "%s.%u", table, | |
756 | sdp->sd_lockstruct.ls_jid); | |
757 | ||
758 | fs_info(sdp, "Joined cluster. Now mounting FS...\n"); | |
759 | ||
760 | if ((sdp->sd_lockstruct.ls_flags & LM_LSFLAG_LOCAL) && | |
761 | !sdp->sd_args.ar_ignore_local_fs) { | |
762 | sdp->sd_args.ar_localflocks = 1; | |
763 | sdp->sd_args.ar_localcaching = 1; | |
764 | } | |
765 | ||
766 | out: | |
767 | return error; | |
768 | } | |
769 | ||
770 | void gfs2_lm_unmount(struct gfs2_sbd *sdp) | |
771 | { | |
772 | if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) | |
773 | gfs2_unmount_lockproto(&sdp->sd_lockstruct); | |
774 | } | |
b3b94faa DT |
775 | |
776 | /** | |
777 | * fill_super - Read in superblock | |
778 | * @sb: The VFS superblock | |
779 | * @data: Mount options | |
780 | * @silent: Don't complain if it's not a GFS2 filesystem | |
781 | * | |
782 | * Returns: errno | |
783 | */ | |
784 | ||
785 | static int fill_super(struct super_block *sb, void *data, int silent) | |
786 | { | |
787 | struct gfs2_sbd *sdp; | |
788 | struct gfs2_holder mount_gh; | |
789 | int error; | |
790 | ||
791 | sdp = init_sbd(sb); | |
792 | if (!sdp) { | |
d92a8d48 | 793 | printk(KERN_WARNING "GFS2: can't alloc struct gfs2_sbd\n"); |
b3b94faa DT |
794 | return -ENOMEM; |
795 | } | |
796 | ||
797 | error = gfs2_mount_args(sdp, (char *)data, 0); | |
798 | if (error) { | |
d92a8d48 | 799 | printk(KERN_WARNING "GFS2: can't parse mount arguments\n"); |
b3b94faa DT |
800 | goto fail; |
801 | } | |
802 | ||
419c93e0 SW |
803 | init_vfs(sb, SDF_NOATIME); |
804 | ||
805 | /* Set up the buffer cache and fill in some fake block size values | |
806 | to allow us to read-in the on-disk superblock. */ | |
807 | sdp->sd_sb.sb_bsize = sb_min_blocksize(sb, GFS2_BASIC_BLOCK); | |
808 | sdp->sd_sb.sb_bsize_shift = sb->s_blocksize_bits; | |
809 | sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift - | |
810 | GFS2_BASIC_BLOCK_SHIFT; | |
811 | sdp->sd_fsb2bb = 1 << sdp->sd_fsb2bb_shift; | |
b3b94faa DT |
812 | |
813 | error = init_names(sdp, silent); | |
814 | if (error) | |
815 | goto fail; | |
816 | ||
7c52b166 RP |
817 | gfs2_create_debugfs_file(sdp); |
818 | ||
b3b94faa DT |
819 | error = gfs2_sys_fs_add(sdp); |
820 | if (error) | |
821 | goto fail; | |
822 | ||
823 | error = gfs2_lm_mount(sdp, silent); | |
824 | if (error) | |
825 | goto fail_sys; | |
826 | ||
827 | error = init_locking(sdp, &mount_gh, DO); | |
828 | if (error) | |
829 | goto fail_lm; | |
830 | ||
831 | error = init_sb(sdp, silent, DO); | |
832 | if (error) | |
833 | goto fail_locking; | |
b3b94faa DT |
834 | |
835 | error = init_inodes(sdp, DO); | |
836 | if (error) | |
f42faf4f | 837 | goto fail_sb; |
b3b94faa DT |
838 | |
839 | error = init_per_node(sdp, DO); | |
840 | if (error) | |
841 | goto fail_inodes; | |
842 | ||
843 | error = gfs2_statfs_init(sdp); | |
844 | if (error) { | |
845 | fs_err(sdp, "can't initialize statfs subsystem: %d\n", error); | |
846 | goto fail_per_node; | |
847 | } | |
848 | ||
849 | error = init_threads(sdp, DO); | |
850 | if (error) | |
851 | goto fail_per_node; | |
852 | ||
853 | if (!(sb->s_flags & MS_RDONLY)) { | |
854 | error = gfs2_make_fs_rw(sdp); | |
855 | if (error) { | |
856 | fs_err(sdp, "can't make FS RW: %d\n", error); | |
857 | goto fail_threads; | |
858 | } | |
859 | } | |
860 | ||
861 | gfs2_glock_dq_uninit(&mount_gh); | |
862 | ||
863 | return 0; | |
864 | ||
a91ea69f | 865 | fail_threads: |
b3b94faa | 866 | init_threads(sdp, UNDO); |
a91ea69f | 867 | fail_per_node: |
b3b94faa | 868 | init_per_node(sdp, UNDO); |
a91ea69f | 869 | fail_inodes: |
b3b94faa | 870 | init_inodes(sdp, UNDO); |
a91ea69f | 871 | fail_sb: |
b3b94faa | 872 | init_sb(sdp, 0, UNDO); |
a91ea69f | 873 | fail_locking: |
b3b94faa | 874 | init_locking(sdp, &mount_gh, UNDO); |
a91ea69f | 875 | fail_lm: |
1bdad606 | 876 | gfs2_gl_hash_clear(sdp); |
b3b94faa DT |
877 | gfs2_lm_unmount(sdp); |
878 | while (invalidate_inodes(sb)) | |
879 | yield(); | |
a91ea69f | 880 | fail_sys: |
b3b94faa | 881 | gfs2_sys_fs_del(sdp); |
a91ea69f | 882 | fail: |
5f882096 | 883 | gfs2_delete_debugfs_file(sdp); |
a2c45807 | 884 | kfree(sdp); |
5c676f6d | 885 | sb->s_fs_info = NULL; |
b3b94faa DT |
886 | return error; |
887 | } | |
888 | ||
ccd6efd0 AM |
889 | static int gfs2_get_sb(struct file_system_type *fs_type, int flags, |
890 | const char *dev_name, void *data, struct vfsmount *mnt) | |
b3b94faa | 891 | { |
86384605 AD |
892 | struct super_block *sb; |
893 | struct gfs2_sbd *sdp; | |
894 | int error = get_sb_bdev(fs_type, flags, dev_name, data, fill_super, mnt); | |
895 | if (error) | |
896 | goto out; | |
897 | sb = mnt->mnt_sb; | |
26c1a574 | 898 | sdp = sb->s_fs_info; |
86384605 AD |
899 | sdp->sd_gfs2mnt = mnt; |
900 | out: | |
901 | return error; | |
902 | } | |
903 | ||
907b9bce | 904 | static int fill_super_meta(struct super_block *sb, struct super_block *new, |
86384605 AD |
905 | void *data, int silent) |
906 | { | |
907 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
908 | struct inode *inode; | |
909 | int error = 0; | |
910 | ||
911 | new->s_fs_info = sdp; | |
912 | sdp->sd_vfs_meta = sb; | |
913 | ||
914 | init_vfs(new, SDF_NOATIME); | |
915 | ||
916 | /* Get the master inode */ | |
917 | inode = igrab(sdp->sd_master_dir); | |
918 | ||
919 | new->s_root = d_alloc_root(inode); | |
920 | if (!new->s_root) { | |
921 | fs_err(sdp, "can't get root dentry\n"); | |
922 | error = -ENOMEM; | |
923 | iput(inode); | |
bbbe4512 AB |
924 | } else |
925 | new->s_root->d_op = &gfs2_dops; | |
86384605 AD |
926 | |
927 | return error; | |
928 | } | |
a91ea69f | 929 | |
86384605 AD |
930 | static int set_bdev_super(struct super_block *s, void *data) |
931 | { | |
932 | s->s_bdev = data; | |
933 | s->s_dev = s->s_bdev->bd_dev; | |
934 | return 0; | |
935 | } | |
907b9bce | 936 | |
86384605 AD |
937 | static int test_bdev_super(struct super_block *s, void *data) |
938 | { | |
26c1a574 | 939 | return s->s_bdev == data; |
86384605 AD |
940 | } |
941 | ||
942 | static struct super_block* get_gfs2_sb(const char *dev_name) | |
943 | { | |
944 | struct kstat stat; | |
945 | struct nameidata nd; | |
86384605 | 946 | struct super_block *sb = NULL, *s; |
86384605 | 947 | int error; |
907b9bce | 948 | |
86384605 AD |
949 | error = path_lookup(dev_name, LOOKUP_FOLLOW, &nd); |
950 | if (error) { | |
907b9bce | 951 | printk(KERN_WARNING "GFS2: path_lookup on %s returned error\n", |
86384605 AD |
952 | dev_name); |
953 | goto out; | |
954 | } | |
4ac91378 | 955 | error = vfs_getattr(nd.path.mnt, nd.path.dentry, &stat); |
86384605 | 956 | |
7dc2cf1c | 957 | list_for_each_entry(s, &gfs2_fs_type.fs_supers, s_instances) { |
86384605 | 958 | if ((S_ISBLK(stat.mode) && s->s_dev == stat.rdev) || |
4ac91378 JB |
959 | (S_ISDIR(stat.mode) && |
960 | s == nd.path.dentry->d_inode->i_sb)) { | |
86384605 AD |
961 | sb = s; |
962 | goto free_nd; | |
963 | } | |
964 | } | |
965 | ||
966 | printk(KERN_WARNING "GFS2: Unrecognized block device or " | |
d5a6751b | 967 | "mount point %s\n", dev_name); |
86384605 AD |
968 | |
969 | free_nd: | |
1d957f9b | 970 | path_put(&nd.path); |
86384605 AD |
971 | out: |
972 | return sb; | |
973 | } | |
974 | ||
975 | static int gfs2_get_sb_meta(struct file_system_type *fs_type, int flags, | |
976 | const char *dev_name, void *data, struct vfsmount *mnt) | |
977 | { | |
978 | int error = 0; | |
979 | struct super_block *sb = NULL, *new; | |
980 | struct gfs2_sbd *sdp; | |
86384605 AD |
981 | |
982 | sb = get_gfs2_sb(dev_name); | |
983 | if (!sb) { | |
984 | printk(KERN_WARNING "GFS2: gfs2 mount does not exist\n"); | |
985 | error = -ENOENT; | |
986 | goto error; | |
987 | } | |
2d3ba1ea | 988 | sdp = sb->s_fs_info; |
86384605 AD |
989 | if (sdp->sd_vfs_meta) { |
990 | printk(KERN_WARNING "GFS2: gfs2meta mount already exists\n"); | |
991 | error = -EBUSY; | |
992 | goto error; | |
993 | } | |
f73ca1b7 | 994 | down(&sb->s_bdev->bd_mount_sem); |
86384605 | 995 | new = sget(fs_type, test_bdev_super, set_bdev_super, sb->s_bdev); |
f73ca1b7 | 996 | up(&sb->s_bdev->bd_mount_sem); |
86384605 AD |
997 | if (IS_ERR(new)) { |
998 | error = PTR_ERR(new); | |
999 | goto error; | |
1000 | } | |
86384605 AD |
1001 | new->s_flags = flags; |
1002 | strlcpy(new->s_id, sb->s_id, sizeof(new->s_id)); | |
1003 | sb_set_blocksize(new, sb->s_blocksize); | |
1004 | error = fill_super_meta(sb, new, data, flags & MS_SILENT ? 1 : 0); | |
1005 | if (error) { | |
1006 | up_write(&new->s_umount); | |
1007 | deactivate_super(new); | |
1008 | goto error; | |
1009 | } | |
907b9bce | 1010 | |
86384605 | 1011 | new->s_flags |= MS_ACTIVE; |
907b9bce | 1012 | |
86384605 AD |
1013 | /* Grab a reference to the gfs2 mount point */ |
1014 | atomic_inc(&sdp->sd_gfs2mnt->mnt_count); | |
1015 | return simple_set_mnt(mnt, new); | |
1016 | error: | |
86384605 | 1017 | return error; |
b3b94faa DT |
1018 | } |
1019 | ||
419c93e0 SW |
1020 | static void gfs2_kill_sb(struct super_block *sb) |
1021 | { | |
d1e2777d AD |
1022 | if (sb->s_fs_info) { |
1023 | gfs2_delete_debugfs_file(sb->s_fs_info); | |
1024 | gfs2_meta_syncfs(sb->s_fs_info); | |
1025 | } | |
419c93e0 SW |
1026 | kill_block_super(sb); |
1027 | } | |
1028 | ||
86384605 AD |
1029 | static void gfs2_kill_sb_meta(struct super_block *sb) |
1030 | { | |
1031 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1032 | generic_shutdown_super(sb); | |
1033 | sdp->sd_vfs_meta = NULL; | |
1034 | atomic_dec(&sdp->sd_gfs2mnt->mnt_count); | |
1035 | } | |
1036 | ||
b3b94faa DT |
1037 | struct file_system_type gfs2_fs_type = { |
1038 | .name = "gfs2", | |
1039 | .fs_flags = FS_REQUIRES_DEV, | |
1040 | .get_sb = gfs2_get_sb, | |
419c93e0 SW |
1041 | .kill_sb = gfs2_kill_sb, |
1042 | .owner = THIS_MODULE, | |
1043 | }; | |
1044 | ||
1045 | struct file_system_type gfs2meta_fs_type = { | |
1046 | .name = "gfs2meta", | |
1047 | .fs_flags = FS_REQUIRES_DEV, | |
86384605 AD |
1048 | .get_sb = gfs2_get_sb_meta, |
1049 | .kill_sb = gfs2_kill_sb_meta, | |
b3b94faa DT |
1050 | .owner = THIS_MODULE, |
1051 | }; | |
1052 |