Commit | Line | Data |
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7336d0e6 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
b3b94faa DT |
2 | /* |
3 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
cf45b752 | 4 | * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved. |
b3b94faa DT |
5 | */ |
6 | ||
d77d1b58 JP |
7 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
8 | ||
b3b94faa DT |
9 | #include <linux/sched.h> |
10 | #include <linux/slab.h> | |
11 | #include <linux/spinlock.h> | |
12 | #include <linux/completion.h> | |
13 | #include <linux/buffer_head.h> | |
b3b94faa DT |
14 | #include <linux/blkdev.h> |
15 | #include <linux/kthread.h> | |
afeacc8c | 16 | #include <linux/export.h> |
86384605 AD |
17 | #include <linux/namei.h> |
18 | #include <linux/mount.h> | |
5c676f6d | 19 | #include <linux/gfs2_ondisk.h> |
cc632e7f | 20 | #include <linux/quotaops.h> |
56aa72d0 | 21 | #include <linux/lockdep.h> |
7f78e035 | 22 | #include <linux/module.h> |
95fe66de | 23 | #include <linux/backing-dev.h> |
1f52aa08 | 24 | #include <linux/fs_parser.h> |
b3b94faa DT |
25 | |
26 | #include "gfs2.h" | |
5c676f6d | 27 | #include "incore.h" |
da6dd40d | 28 | #include "bmap.h" |
b3b94faa DT |
29 | #include "glock.h" |
30 | #include "glops.h" | |
31 | #include "inode.h" | |
b3b94faa DT |
32 | #include "recovery.h" |
33 | #include "rgrp.h" | |
34 | #include "super.h" | |
b3b94faa | 35 | #include "sys.h" |
5c676f6d | 36 | #include "util.h" |
bb3b0e3d | 37 | #include "log.h" |
9ac1b4d9 | 38 | #include "quota.h" |
b5289681 | 39 | #include "dir.h" |
70d4ee94 | 40 | #include "meta_io.h" |
63997775 | 41 | #include "trace_gfs2.h" |
f4686c26 | 42 | #include "lops.h" |
b3b94faa DT |
43 | |
44 | #define DO 0 | |
45 | #define UNDO 1 | |
46 | ||
9b8df98f SW |
47 | /** |
48 | * gfs2_tune_init - Fill a gfs2_tune structure with default values | |
49 | * @gt: tune | |
50 | * | |
51 | */ | |
52 | ||
53 | static void gfs2_tune_init(struct gfs2_tune *gt) | |
54 | { | |
55 | spin_lock_init(>->gt_spin); | |
56 | ||
9b8df98f SW |
57 | gt->gt_quota_warn_period = 10; |
58 | gt->gt_quota_scale_num = 1; | |
59 | gt->gt_quota_scale_den = 1; | |
9b8df98f | 60 | gt->gt_new_files_jdata = 0; |
47a9a527 | 61 | gt->gt_max_readahead = BIT(18); |
9b8df98f | 62 | gt->gt_complain_secs = 10; |
9b8df98f SW |
63 | } |
64 | ||
2a27b755 AG |
65 | void free_sbd(struct gfs2_sbd *sdp) |
66 | { | |
67 | if (sdp->sd_lkstats) | |
68 | free_percpu(sdp->sd_lkstats); | |
69 | kfree(sdp); | |
70 | } | |
71 | ||
b3b94faa DT |
72 | static struct gfs2_sbd *init_sbd(struct super_block *sb) |
73 | { | |
74 | struct gfs2_sbd *sdp; | |
70d4ee94 | 75 | struct address_space *mapping; |
b3b94faa | 76 | |
85d1da67 | 77 | sdp = kzalloc(sizeof(struct gfs2_sbd), GFP_KERNEL); |
b3b94faa DT |
78 | if (!sdp) |
79 | return NULL; | |
80 | ||
b3b94faa | 81 | sdp->sd_vfs = sb; |
a245769f | 82 | sdp->sd_lkstats = alloc_percpu(struct gfs2_pcpu_lkstats); |
2a27b755 AG |
83 | if (!sdp->sd_lkstats) |
84 | goto fail; | |
4c62bd9c | 85 | sb->s_fs_info = sdp; |
a245769f | 86 | |
ba6e9364 | 87 | set_bit(SDF_NOJOURNALID, &sdp->sd_flags); |
b3b94faa DT |
88 | gfs2_tune_init(&sdp->sd_tune); |
89 | ||
e402746a | 90 | init_waitqueue_head(&sdp->sd_glock_wait); |
ad26967b | 91 | init_waitqueue_head(&sdp->sd_async_glock_wait); |
e402746a | 92 | atomic_set(&sdp->sd_glock_disposal, 0); |
3942ae53 | 93 | init_completion(&sdp->sd_locking_init); |
fd95e81c | 94 | init_completion(&sdp->sd_wdack); |
b3b94faa | 95 | spin_lock_init(&sdp->sd_statfs_spin); |
b3b94faa DT |
96 | |
97 | spin_lock_init(&sdp->sd_rindex_spin); | |
7c9ca621 | 98 | sdp->sd_rindex_tree.rb_node = NULL; |
b3b94faa DT |
99 | |
100 | INIT_LIST_HEAD(&sdp->sd_jindex_list); | |
101 | spin_lock_init(&sdp->sd_jindex_spin); | |
f55ab26a | 102 | mutex_init(&sdp->sd_jindex_mutex); |
0e48e055 | 103 | init_completion(&sdp->sd_journal_ready); |
b3b94faa | 104 | |
b3b94faa | 105 | INIT_LIST_HEAD(&sdp->sd_quota_list); |
f55ab26a | 106 | mutex_init(&sdp->sd_quota_mutex); |
e46c772d | 107 | mutex_init(&sdp->sd_quota_sync_mutex); |
37b2c837 | 108 | init_waitqueue_head(&sdp->sd_quota_wait); |
813e0c46 SW |
109 | INIT_LIST_HEAD(&sdp->sd_trunc_list); |
110 | spin_lock_init(&sdp->sd_trunc_lock); | |
2d9e7230 | 111 | spin_lock_init(&sdp->sd_bitmap_lock); |
b3b94faa | 112 | |
70d4ee94 SW |
113 | mapping = &sdp->sd_aspace; |
114 | ||
39849d69 | 115 | address_space_init_once(mapping); |
1b2ad412 | 116 | mapping->a_ops = &gfs2_rgrp_aops; |
70d4ee94 SW |
117 | mapping->host = sb->s_bdev->bd_inode; |
118 | mapping->flags = 0; | |
119 | mapping_set_gfp_mask(mapping, GFP_NOFS); | |
120 | mapping->private_data = NULL; | |
70d4ee94 SW |
121 | mapping->writeback_index = 0; |
122 | ||
b3b94faa | 123 | spin_lock_init(&sdp->sd_log_lock); |
5e687eac | 124 | atomic_set(&sdp->sd_log_pinned, 0); |
a5b1d3fc AG |
125 | INIT_LIST_HEAD(&sdp->sd_log_revokes); |
126 | INIT_LIST_HEAD(&sdp->sd_log_ordered); | |
45138990 | 127 | spin_lock_init(&sdp->sd_ordered_lock); |
b3b94faa | 128 | |
5e687eac BM |
129 | init_waitqueue_head(&sdp->sd_log_waitq); |
130 | init_waitqueue_head(&sdp->sd_logd_waitq); | |
d6a079e8 | 131 | spin_lock_init(&sdp->sd_ail_lock); |
b3b94faa DT |
132 | INIT_LIST_HEAD(&sdp->sd_ail1_list); |
133 | INIT_LIST_HEAD(&sdp->sd_ail2_list); | |
134 | ||
484adff8 | 135 | init_rwsem(&sdp->sd_log_flush_lock); |
16615be1 | 136 | atomic_set(&sdp->sd_log_in_flight, 0); |
2e60d768 BM |
137 | atomic_set(&sdp->sd_reserving_log, 0); |
138 | init_waitqueue_head(&sdp->sd_reserving_log_wait); | |
16615be1 | 139 | init_waitqueue_head(&sdp->sd_log_flush_wait); |
2e60d768 BM |
140 | atomic_set(&sdp->sd_freeze_state, SFS_UNFROZEN); |
141 | mutex_init(&sdp->sd_freeze_mutex); | |
b3b94faa | 142 | |
b3b94faa | 143 | return sdp; |
b3b94faa | 144 | |
2a27b755 AG |
145 | fail: |
146 | free_sbd(sdp); | |
147 | return NULL; | |
148 | } | |
b3b94faa | 149 | |
9b8df98f SW |
150 | /** |
151 | * gfs2_check_sb - Check superblock | |
152 | * @sdp: the filesystem | |
153 | * @sb: The superblock | |
154 | * @silent: Don't print a message if the check fails | |
155 | * | |
156 | * Checks the version code of the FS is one that we understand how to | |
157 | * read and that the sizes of the various on-disk structures have not | |
158 | * changed. | |
159 | */ | |
160 | ||
32e471ef | 161 | static int gfs2_check_sb(struct gfs2_sbd *sdp, int silent) |
9b8df98f | 162 | { |
32e471ef SW |
163 | struct gfs2_sb_host *sb = &sdp->sd_sb; |
164 | ||
9b8df98f SW |
165 | if (sb->sb_magic != GFS2_MAGIC || |
166 | sb->sb_type != GFS2_METATYPE_SB) { | |
167 | if (!silent) | |
d77d1b58 | 168 | pr_warn("not a GFS2 filesystem\n"); |
9b8df98f SW |
169 | return -EINVAL; |
170 | } | |
171 | ||
172 | /* If format numbers match exactly, we're done. */ | |
173 | ||
174 | if (sb->sb_fs_format == GFS2_FORMAT_FS && | |
175 | sb->sb_multihost_format == GFS2_FORMAT_MULTI) | |
176 | return 0; | |
177 | ||
c80dbb58 | 178 | fs_warn(sdp, "Unknown on-disk format, unable to mount\n"); |
9b8df98f | 179 | |
c80dbb58 | 180 | return -EINVAL; |
9b8df98f SW |
181 | } |
182 | ||
4246a0b6 | 183 | static void end_bio_io_page(struct bio *bio) |
9b8df98f SW |
184 | { |
185 | struct page *page = bio->bi_private; | |
186 | ||
4e4cbee9 | 187 | if (!bio->bi_status) |
9b8df98f SW |
188 | SetPageUptodate(page); |
189 | else | |
4e4cbee9 | 190 | pr_warn("error %d reading superblock\n", bio->bi_status); |
9b8df98f SW |
191 | unlock_page(page); |
192 | } | |
193 | ||
32e471ef | 194 | static void gfs2_sb_in(struct gfs2_sbd *sdp, const void *buf) |
9b8df98f | 195 | { |
32e471ef SW |
196 | struct gfs2_sb_host *sb = &sdp->sd_sb; |
197 | struct super_block *s = sdp->sd_vfs; | |
9b8df98f SW |
198 | const struct gfs2_sb *str = buf; |
199 | ||
200 | sb->sb_magic = be32_to_cpu(str->sb_header.mh_magic); | |
201 | sb->sb_type = be32_to_cpu(str->sb_header.mh_type); | |
202 | sb->sb_format = be32_to_cpu(str->sb_header.mh_format); | |
203 | sb->sb_fs_format = be32_to_cpu(str->sb_fs_format); | |
204 | sb->sb_multihost_format = be32_to_cpu(str->sb_multihost_format); | |
205 | sb->sb_bsize = be32_to_cpu(str->sb_bsize); | |
206 | sb->sb_bsize_shift = be32_to_cpu(str->sb_bsize_shift); | |
207 | sb->sb_master_dir.no_addr = be64_to_cpu(str->sb_master_dir.no_addr); | |
208 | sb->sb_master_dir.no_formal_ino = be64_to_cpu(str->sb_master_dir.no_formal_ino); | |
209 | sb->sb_root_dir.no_addr = be64_to_cpu(str->sb_root_dir.no_addr); | |
210 | sb->sb_root_dir.no_formal_ino = be64_to_cpu(str->sb_root_dir.no_formal_ino); | |
211 | ||
212 | memcpy(sb->sb_lockproto, str->sb_lockproto, GFS2_LOCKNAME_LEN); | |
213 | memcpy(sb->sb_locktable, str->sb_locktable, GFS2_LOCKNAME_LEN); | |
85787090 | 214 | memcpy(&s->s_uuid, str->sb_uuid, 16); |
9b8df98f SW |
215 | } |
216 | ||
217 | /** | |
218 | * gfs2_read_super - Read the gfs2 super block from disk | |
219 | * @sdp: The GFS2 super block | |
220 | * @sector: The location of the super block | |
221 | * @error: The error code to return | |
222 | * | |
223 | * This uses the bio functions to read the super block from disk | |
224 | * because we want to be 100% sure that we never read cached data. | |
225 | * A super block is read twice only during each GFS2 mount and is | |
226 | * never written to by the filesystem. The first time its read no | |
227 | * locks are held, and the only details which are looked at are those | |
228 | * relating to the locking protocol. Once locking is up and working, | |
229 | * the sb is read again under the lock to establish the location of | |
230 | * the master directory (contains pointers to journals etc) and the | |
231 | * root directory. | |
232 | * | |
233 | * Returns: 0 on success or error | |
234 | */ | |
235 | ||
32e471ef | 236 | static int gfs2_read_super(struct gfs2_sbd *sdp, sector_t sector, int silent) |
9b8df98f SW |
237 | { |
238 | struct super_block *sb = sdp->sd_vfs; | |
239 | struct gfs2_sb *p; | |
240 | struct page *page; | |
241 | struct bio *bio; | |
242 | ||
243 | page = alloc_page(GFP_NOFS); | |
244 | if (unlikely(!page)) | |
ac3beb6a | 245 | return -ENOMEM; |
9b8df98f SW |
246 | |
247 | ClearPageUptodate(page); | |
248 | ClearPageDirty(page); | |
249 | lock_page(page); | |
250 | ||
251 | bio = bio_alloc(GFP_NOFS, 1); | |
4f024f37 | 252 | bio->bi_iter.bi_sector = sector * (sb->s_blocksize >> 9); |
74d46992 | 253 | bio_set_dev(bio, sb->s_bdev); |
9b8df98f SW |
254 | bio_add_page(bio, page, PAGE_SIZE, 0); |
255 | ||
256 | bio->bi_end_io = end_bio_io_page; | |
257 | bio->bi_private = page; | |
70fd7614 | 258 | bio_set_op_attrs(bio, REQ_OP_READ, REQ_META); |
4e49ea4a | 259 | submit_bio(bio); |
9b8df98f SW |
260 | wait_on_page_locked(page); |
261 | bio_put(bio); | |
262 | if (!PageUptodate(page)) { | |
263 | __free_page(page); | |
264 | return -EIO; | |
265 | } | |
266 | p = kmap(page); | |
32e471ef | 267 | gfs2_sb_in(sdp, p); |
9b8df98f SW |
268 | kunmap(page); |
269 | __free_page(page); | |
32e471ef | 270 | return gfs2_check_sb(sdp, silent); |
9b8df98f | 271 | } |
6bac243f | 272 | |
9b8df98f SW |
273 | /** |
274 | * gfs2_read_sb - Read super block | |
275 | * @sdp: The GFS2 superblock | |
9b8df98f SW |
276 | * @silent: Don't print message if mount fails |
277 | * | |
278 | */ | |
279 | ||
6bac243f | 280 | static int gfs2_read_sb(struct gfs2_sbd *sdp, int silent) |
9b8df98f SW |
281 | { |
282 | u32 hash_blocks, ind_blocks, leaf_blocks; | |
283 | u32 tmp_blocks; | |
284 | unsigned int x; | |
285 | int error; | |
286 | ||
32e471ef | 287 | error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift, silent); |
9b8df98f SW |
288 | if (error) { |
289 | if (!silent) | |
290 | fs_err(sdp, "can't read superblock\n"); | |
291 | return error; | |
292 | } | |
293 | ||
9b8df98f SW |
294 | sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift - |
295 | GFS2_BASIC_BLOCK_SHIFT; | |
47a9a527 | 296 | sdp->sd_fsb2bb = BIT(sdp->sd_fsb2bb_shift); |
9b8df98f SW |
297 | sdp->sd_diptrs = (sdp->sd_sb.sb_bsize - |
298 | sizeof(struct gfs2_dinode)) / sizeof(u64); | |
299 | sdp->sd_inptrs = (sdp->sd_sb.sb_bsize - | |
300 | sizeof(struct gfs2_meta_header)) / sizeof(u64); | |
301 | sdp->sd_jbsize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_meta_header); | |
302 | sdp->sd_hash_bsize = sdp->sd_sb.sb_bsize / 2; | |
303 | sdp->sd_hash_bsize_shift = sdp->sd_sb.sb_bsize_shift - 1; | |
304 | sdp->sd_hash_ptrs = sdp->sd_hash_bsize / sizeof(u64); | |
305 | sdp->sd_qc_per_block = (sdp->sd_sb.sb_bsize - | |
306 | sizeof(struct gfs2_meta_header)) / | |
307 | sizeof(struct gfs2_quota_change); | |
a68a0a35 BP |
308 | sdp->sd_blocks_per_bitmap = (sdp->sd_sb.sb_bsize - |
309 | sizeof(struct gfs2_meta_header)) | |
310 | * GFS2_NBBY; /* not the rgrp bitmap, subsequent bitmaps only */ | |
9b8df98f SW |
311 | |
312 | /* Compute maximum reservation required to add a entry to a directory */ | |
313 | ||
47a9a527 | 314 | hash_blocks = DIV_ROUND_UP(sizeof(u64) * BIT(GFS2_DIR_MAX_DEPTH), |
9b8df98f SW |
315 | sdp->sd_jbsize); |
316 | ||
317 | ind_blocks = 0; | |
318 | for (tmp_blocks = hash_blocks; tmp_blocks > sdp->sd_diptrs;) { | |
319 | tmp_blocks = DIV_ROUND_UP(tmp_blocks, sdp->sd_inptrs); | |
320 | ind_blocks += tmp_blocks; | |
321 | } | |
322 | ||
323 | leaf_blocks = 2 + GFS2_DIR_MAX_DEPTH; | |
324 | ||
325 | sdp->sd_max_dirres = hash_blocks + ind_blocks + leaf_blocks; | |
326 | ||
327 | sdp->sd_heightsize[0] = sdp->sd_sb.sb_bsize - | |
328 | sizeof(struct gfs2_dinode); | |
329 | sdp->sd_heightsize[1] = sdp->sd_sb.sb_bsize * sdp->sd_diptrs; | |
330 | for (x = 2;; x++) { | |
331 | u64 space, d; | |
332 | u32 m; | |
333 | ||
334 | space = sdp->sd_heightsize[x - 1] * sdp->sd_inptrs; | |
335 | d = space; | |
336 | m = do_div(d, sdp->sd_inptrs); | |
337 | ||
338 | if (d != sdp->sd_heightsize[x - 1] || m) | |
339 | break; | |
340 | sdp->sd_heightsize[x] = space; | |
341 | } | |
342 | sdp->sd_max_height = x; | |
343 | sdp->sd_heightsize[x] = ~0; | |
344 | gfs2_assert(sdp, sdp->sd_max_height <= GFS2_MAX_META_HEIGHT); | |
345 | ||
471f3db2 BM |
346 | sdp->sd_max_dents_per_leaf = (sdp->sd_sb.sb_bsize - |
347 | sizeof(struct gfs2_leaf)) / | |
348 | GFS2_MIN_DIRENT_SIZE; | |
9b8df98f SW |
349 | return 0; |
350 | } | |
351 | ||
b3b94faa DT |
352 | static int init_names(struct gfs2_sbd *sdp, int silent) |
353 | { | |
b3b94faa DT |
354 | char *proto, *table; |
355 | int error = 0; | |
356 | ||
357 | proto = sdp->sd_args.ar_lockproto; | |
358 | table = sdp->sd_args.ar_locktable; | |
359 | ||
360 | /* Try to autodetect */ | |
361 | ||
362 | if (!proto[0] || !table[0]) { | |
32e471ef | 363 | error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift, silent); |
bb8d8a6f SW |
364 | if (error) |
365 | return error; | |
3cf1e7be | 366 | |
b3b94faa | 367 | if (!proto[0]) |
3cf1e7be | 368 | proto = sdp->sd_sb.sb_lockproto; |
b3b94faa | 369 | if (!table[0]) |
3cf1e7be | 370 | table = sdp->sd_sb.sb_locktable; |
b3b94faa DT |
371 | } |
372 | ||
373 | if (!table[0]) | |
374 | table = sdp->sd_vfs->s_id; | |
375 | ||
00377d8e JD |
376 | strlcpy(sdp->sd_proto_name, proto, GFS2_FSNAME_LEN); |
377 | strlcpy(sdp->sd_table_name, table, GFS2_FSNAME_LEN); | |
b3b94faa | 378 | |
5d35e31f DC |
379 | table = sdp->sd_table_name; |
380 | while ((table = strchr(table, '/'))) | |
b35997d4 RP |
381 | *table = '_'; |
382 | ||
b3b94faa DT |
383 | return error; |
384 | } | |
385 | ||
386 | static int init_locking(struct gfs2_sbd *sdp, struct gfs2_holder *mount_gh, | |
387 | int undo) | |
388 | { | |
b3b94faa DT |
389 | int error = 0; |
390 | ||
391 | if (undo) | |
392 | goto fail_trans; | |
393 | ||
b3b94faa DT |
394 | error = gfs2_glock_nq_num(sdp, |
395 | GFS2_MOUNT_LOCK, &gfs2_nondisk_glops, | |
396 | LM_ST_EXCLUSIVE, LM_FLAG_NOEXP | GL_NOCACHE, | |
397 | mount_gh); | |
398 | if (error) { | |
399 | fs_err(sdp, "can't acquire mount glock: %d\n", error); | |
400 | goto fail; | |
401 | } | |
402 | ||
403 | error = gfs2_glock_nq_num(sdp, | |
404 | GFS2_LIVE_LOCK, &gfs2_nondisk_glops, | |
405 | LM_ST_SHARED, | |
579b78a4 | 406 | LM_FLAG_NOEXP | GL_EXACT, |
b3b94faa DT |
407 | &sdp->sd_live_gh); |
408 | if (error) { | |
409 | fs_err(sdp, "can't acquire live glock: %d\n", error); | |
410 | goto fail_mount; | |
411 | } | |
412 | ||
413 | error = gfs2_glock_get(sdp, GFS2_RENAME_LOCK, &gfs2_nondisk_glops, | |
414 | CREATE, &sdp->sd_rename_gl); | |
415 | if (error) { | |
416 | fs_err(sdp, "can't create rename glock: %d\n", error); | |
417 | goto fail_live; | |
418 | } | |
419 | ||
24972557 BM |
420 | error = gfs2_glock_get(sdp, GFS2_FREEZE_LOCK, &gfs2_freeze_glops, |
421 | CREATE, &sdp->sd_freeze_gl); | |
b3b94faa DT |
422 | if (error) { |
423 | fs_err(sdp, "can't create transaction glock: %d\n", error); | |
424 | goto fail_rename; | |
425 | } | |
b3b94faa DT |
426 | |
427 | return 0; | |
428 | ||
feaa7bba | 429 | fail_trans: |
24972557 | 430 | gfs2_glock_put(sdp->sd_freeze_gl); |
feaa7bba | 431 | fail_rename: |
b3b94faa | 432 | gfs2_glock_put(sdp->sd_rename_gl); |
feaa7bba | 433 | fail_live: |
b3b94faa | 434 | gfs2_glock_dq_uninit(&sdp->sd_live_gh); |
feaa7bba | 435 | fail_mount: |
b3b94faa | 436 | gfs2_glock_dq_uninit(mount_gh); |
feaa7bba | 437 | fail: |
b3b94faa DT |
438 | return error; |
439 | } | |
440 | ||
9b8df98f SW |
441 | static int gfs2_lookup_root(struct super_block *sb, struct dentry **dptr, |
442 | u64 no_addr, const char *name) | |
f42faf4f | 443 | { |
9b8df98f SW |
444 | struct gfs2_sbd *sdp = sb->s_fs_info; |
445 | struct dentry *dentry; | |
446 | struct inode *inode; | |
447 | ||
3ce37b2c AG |
448 | inode = gfs2_inode_lookup(sb, DT_DIR, no_addr, 0, |
449 | GFS2_BLKST_FREE /* ignore */); | |
9b8df98f SW |
450 | if (IS_ERR(inode)) { |
451 | fs_err(sdp, "can't read in %s inode: %ld\n", name, PTR_ERR(inode)); | |
452 | return PTR_ERR(inode); | |
453 | } | |
48fde701 | 454 | dentry = d_make_root(inode); |
9b8df98f SW |
455 | if (!dentry) { |
456 | fs_err(sdp, "can't alloc %s dentry\n", name); | |
9b8df98f SW |
457 | return -ENOMEM; |
458 | } | |
9b8df98f SW |
459 | *dptr = dentry; |
460 | return 0; | |
f42faf4f SW |
461 | } |
462 | ||
9b8df98f | 463 | static int init_sb(struct gfs2_sbd *sdp, int silent) |
b3b94faa DT |
464 | { |
465 | struct super_block *sb = sdp->sd_vfs; | |
466 | struct gfs2_holder sb_gh; | |
dbb7cae2 | 467 | u64 no_addr; |
9b8df98f | 468 | int ret; |
b3b94faa | 469 | |
9b8df98f SW |
470 | ret = gfs2_glock_nq_num(sdp, GFS2_SB_LOCK, &gfs2_meta_glops, |
471 | LM_ST_SHARED, 0, &sb_gh); | |
472 | if (ret) { | |
473 | fs_err(sdp, "can't acquire superblock glock: %d\n", ret); | |
474 | return ret; | |
b3b94faa | 475 | } |
907b9bce | 476 | |
6bac243f | 477 | ret = gfs2_read_sb(sdp, silent); |
9b8df98f SW |
478 | if (ret) { |
479 | fs_err(sdp, "can't read superblock: %d\n", ret); | |
b3b94faa DT |
480 | goto out; |
481 | } | |
482 | ||
483 | /* Set up the buffer cache and SB for real */ | |
e1defc4f | 484 | if (sdp->sd_sb.sb_bsize < bdev_logical_block_size(sb->s_bdev)) { |
9b8df98f | 485 | ret = -EINVAL; |
b3b94faa DT |
486 | fs_err(sdp, "FS block size (%u) is too small for device " |
487 | "block size (%u)\n", | |
e1defc4f | 488 | sdp->sd_sb.sb_bsize, bdev_logical_block_size(sb->s_bdev)); |
b3b94faa DT |
489 | goto out; |
490 | } | |
491 | if (sdp->sd_sb.sb_bsize > PAGE_SIZE) { | |
9b8df98f | 492 | ret = -EINVAL; |
b3b94faa DT |
493 | fs_err(sdp, "FS block size (%u) is too big for machine " |
494 | "page size (%u)\n", | |
495 | sdp->sd_sb.sb_bsize, (unsigned int)PAGE_SIZE); | |
496 | goto out; | |
497 | } | |
b3b94faa DT |
498 | sb_set_blocksize(sb, sdp->sd_sb.sb_bsize); |
499 | ||
f42faf4f | 500 | /* Get the root inode */ |
dbb7cae2 | 501 | no_addr = sdp->sd_sb.sb_root_dir.no_addr; |
9b8df98f SW |
502 | ret = gfs2_lookup_root(sb, &sdp->sd_root_dir, no_addr, "root"); |
503 | if (ret) | |
f42faf4f | 504 | goto out; |
b3b94faa | 505 | |
9b8df98f SW |
506 | /* Get the master inode */ |
507 | no_addr = sdp->sd_sb.sb_master_dir.no_addr; | |
508 | ret = gfs2_lookup_root(sb, &sdp->sd_master_dir, no_addr, "master"); | |
509 | if (ret) { | |
510 | dput(sdp->sd_root_dir); | |
511 | goto out; | |
512 | } | |
513 | sb->s_root = dget(sdp->sd_args.ar_meta ? sdp->sd_master_dir : sdp->sd_root_dir); | |
f42faf4f | 514 | out: |
b3b94faa | 515 | gfs2_glock_dq_uninit(&sb_gh); |
9b8df98f | 516 | return ret; |
b3b94faa DT |
517 | } |
518 | ||
f057f6cd | 519 | static void gfs2_others_may_mount(struct gfs2_sbd *sdp) |
da755fdb | 520 | { |
f057f6cd SW |
521 | char *message = "FIRSTMOUNT=Done"; |
522 | char *envp[] = { message, NULL }; | |
e0c2a9aa DT |
523 | |
524 | fs_info(sdp, "first mount done, others may mount\n"); | |
525 | ||
526 | if (sdp->sd_lockstruct.ls_ops->lm_first_done) | |
527 | sdp->sd_lockstruct.ls_ops->lm_first_done(sdp); | |
528 | ||
f057f6cd | 529 | kobject_uevent_env(&sdp->sd_kobj, KOBJ_CHANGE, envp); |
da755fdb SW |
530 | } |
531 | ||
b5289681 SW |
532 | /** |
533 | * gfs2_jindex_hold - Grab a lock on the jindex | |
534 | * @sdp: The GFS2 superblock | |
535 | * @ji_gh: the holder for the jindex glock | |
536 | * | |
537 | * Returns: errno | |
538 | */ | |
539 | ||
540 | static int gfs2_jindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ji_gh) | |
541 | { | |
542 | struct gfs2_inode *dip = GFS2_I(sdp->sd_jindex); | |
543 | struct qstr name; | |
544 | char buf[20]; | |
545 | struct gfs2_jdesc *jd; | |
546 | int error; | |
547 | ||
548 | name.name = buf; | |
549 | ||
550 | mutex_lock(&sdp->sd_jindex_mutex); | |
551 | ||
552 | for (;;) { | |
553 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, ji_gh); | |
554 | if (error) | |
555 | break; | |
556 | ||
557 | name.len = sprintf(buf, "journal%u", sdp->sd_journals); | |
558 | name.hash = gfs2_disk_hash(name.name, name.len); | |
559 | ||
560 | error = gfs2_dir_check(sdp->sd_jindex, &name, NULL); | |
561 | if (error == -ENOENT) { | |
562 | error = 0; | |
563 | break; | |
564 | } | |
565 | ||
566 | gfs2_glock_dq_uninit(ji_gh); | |
567 | ||
568 | if (error) | |
569 | break; | |
570 | ||
571 | error = -ENOMEM; | |
572 | jd = kzalloc(sizeof(struct gfs2_jdesc), GFP_KERNEL); | |
573 | if (!jd) | |
574 | break; | |
575 | ||
576 | INIT_LIST_HEAD(&jd->extent_list); | |
a17d758b BP |
577 | INIT_LIST_HEAD(&jd->jd_revoke_list); |
578 | ||
6ecd7c2d | 579 | INIT_WORK(&jd->jd_work, gfs2_recover_func); |
b5289681 | 580 | jd->jd_inode = gfs2_lookupi(sdp->sd_jindex, &name, 1); |
15a798f7 | 581 | if (IS_ERR_OR_NULL(jd->jd_inode)) { |
b5289681 SW |
582 | if (!jd->jd_inode) |
583 | error = -ENOENT; | |
584 | else | |
585 | error = PTR_ERR(jd->jd_inode); | |
586 | kfree(jd); | |
587 | break; | |
588 | } | |
589 | ||
590 | spin_lock(&sdp->sd_jindex_spin); | |
591 | jd->jd_jid = sdp->sd_journals++; | |
592 | list_add_tail(&jd->jd_list, &sdp->sd_jindex_list); | |
593 | spin_unlock(&sdp->sd_jindex_spin); | |
594 | } | |
595 | ||
596 | mutex_unlock(&sdp->sd_jindex_mutex); | |
597 | ||
598 | return error; | |
599 | } | |
600 | ||
1d12d175 BP |
601 | /** |
602 | * check_journal_clean - Make sure a journal is clean for a spectator mount | |
603 | * @sdp: The GFS2 superblock | |
604 | * @jd: The journal descriptor | |
605 | * | |
606 | * Returns: 0 if the journal is clean or locked, else an error | |
607 | */ | |
608 | static int check_journal_clean(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd) | |
609 | { | |
610 | int error; | |
611 | struct gfs2_holder j_gh; | |
612 | struct gfs2_log_header_host head; | |
613 | struct gfs2_inode *ip; | |
614 | ||
615 | ip = GFS2_I(jd->jd_inode); | |
616 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, LM_FLAG_NOEXP | | |
617 | GL_EXACT | GL_NOCACHE, &j_gh); | |
618 | if (error) { | |
619 | fs_err(sdp, "Error locking journal for spectator mount.\n"); | |
620 | return -EPERM; | |
621 | } | |
622 | error = gfs2_jdesc_check(jd); | |
623 | if (error) { | |
624 | fs_err(sdp, "Error checking journal for spectator mount.\n"); | |
625 | goto out_unlock; | |
626 | } | |
f4686c26 | 627 | error = gfs2_find_jhead(jd, &head, false); |
1d12d175 BP |
628 | if (error) { |
629 | fs_err(sdp, "Error parsing journal for spectator mount.\n"); | |
630 | goto out_unlock; | |
631 | } | |
632 | if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) { | |
633 | error = -EPERM; | |
634 | fs_err(sdp, "jid=%u: Journal is dirty, so the first mounter " | |
635 | "must not be a spectator.\n", jd->jd_jid); | |
636 | } | |
637 | ||
638 | out_unlock: | |
639 | gfs2_glock_dq_uninit(&j_gh); | |
640 | return error; | |
641 | } | |
642 | ||
b3b94faa DT |
643 | static int init_journal(struct gfs2_sbd *sdp, int undo) |
644 | { | |
2b0143b5 | 645 | struct inode *master = d_inode(sdp->sd_master_dir); |
b3b94faa | 646 | struct gfs2_holder ji_gh; |
5c676f6d | 647 | struct gfs2_inode *ip; |
b3b94faa DT |
648 | int jindex = 1; |
649 | int error = 0; | |
650 | ||
651 | if (undo) { | |
652 | jindex = 0; | |
fe64d517 | 653 | goto fail_jinode_gh; |
b3b94faa DT |
654 | } |
655 | ||
9b8df98f | 656 | sdp->sd_jindex = gfs2_lookup_simple(master, "jindex"); |
c752666c | 657 | if (IS_ERR(sdp->sd_jindex)) { |
b3b94faa | 658 | fs_err(sdp, "can't lookup journal index: %d\n", error); |
c752666c | 659 | return PTR_ERR(sdp->sd_jindex); |
b3b94faa | 660 | } |
b3b94faa DT |
661 | |
662 | /* Load in the journal index special file */ | |
663 | ||
664 | error = gfs2_jindex_hold(sdp, &ji_gh); | |
665 | if (error) { | |
666 | fs_err(sdp, "can't read journal index: %d\n", error); | |
667 | goto fail; | |
668 | } | |
669 | ||
0e5a9fb0 | 670 | error = -EUSERS; |
b3b94faa DT |
671 | if (!gfs2_jindex_size(sdp)) { |
672 | fs_err(sdp, "no journals!\n"); | |
907b9bce | 673 | goto fail_jindex; |
b3b94faa DT |
674 | } |
675 | ||
f07b3520 | 676 | atomic_set(&sdp->sd_log_blks_needed, 0); |
b3b94faa DT |
677 | if (sdp->sd_args.ar_spectator) { |
678 | sdp->sd_jdesc = gfs2_jdesc_find(sdp, 0); | |
fd041f0b | 679 | atomic_set(&sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks); |
5e687eac BM |
680 | atomic_set(&sdp->sd_log_thresh1, 2*sdp->sd_jdesc->jd_blocks/5); |
681 | atomic_set(&sdp->sd_log_thresh2, 4*sdp->sd_jdesc->jd_blocks/5); | |
b3b94faa DT |
682 | } else { |
683 | if (sdp->sd_lockstruct.ls_jid >= gfs2_jindex_size(sdp)) { | |
684 | fs_err(sdp, "can't mount journal #%u\n", | |
685 | sdp->sd_lockstruct.ls_jid); | |
686 | fs_err(sdp, "there are only %u journals (0 - %u)\n", | |
687 | gfs2_jindex_size(sdp), | |
688 | gfs2_jindex_size(sdp) - 1); | |
689 | goto fail_jindex; | |
690 | } | |
691 | sdp->sd_jdesc = gfs2_jdesc_find(sdp, sdp->sd_lockstruct.ls_jid); | |
692 | ||
feaa7bba | 693 | error = gfs2_glock_nq_num(sdp, sdp->sd_lockstruct.ls_jid, |
b3b94faa DT |
694 | &gfs2_journal_glops, |
695 | LM_ST_EXCLUSIVE, LM_FLAG_NOEXP, | |
696 | &sdp->sd_journal_gh); | |
697 | if (error) { | |
698 | fs_err(sdp, "can't acquire journal glock: %d\n", error); | |
699 | goto fail_jindex; | |
700 | } | |
701 | ||
feaa7bba SW |
702 | ip = GFS2_I(sdp->sd_jdesc->jd_inode); |
703 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, | |
75be73a8 | 704 | LM_FLAG_NOEXP | GL_EXACT | GL_NOCACHE, |
b3b94faa DT |
705 | &sdp->sd_jinode_gh); |
706 | if (error) { | |
707 | fs_err(sdp, "can't acquire journal inode glock: %d\n", | |
708 | error); | |
709 | goto fail_journal_gh; | |
710 | } | |
711 | ||
712 | error = gfs2_jdesc_check(sdp->sd_jdesc); | |
713 | if (error) { | |
714 | fs_err(sdp, "my journal (%u) is bad: %d\n", | |
715 | sdp->sd_jdesc->jd_jid, error); | |
716 | goto fail_jinode_gh; | |
717 | } | |
fd041f0b | 718 | atomic_set(&sdp->sd_log_blks_free, sdp->sd_jdesc->jd_blocks); |
5e687eac BM |
719 | atomic_set(&sdp->sd_log_thresh1, 2*sdp->sd_jdesc->jd_blocks/5); |
720 | atomic_set(&sdp->sd_log_thresh2, 4*sdp->sd_jdesc->jd_blocks/5); | |
da6dd40d BP |
721 | |
722 | /* Map the extents for this journal's blocks */ | |
b50f227b | 723 | gfs2_map_journal_extents(sdp, sdp->sd_jdesc); |
b3b94faa | 724 | } |
63997775 | 725 | trace_gfs2_log_blocks(sdp, atomic_read(&sdp->sd_log_blks_free)); |
b3b94faa DT |
726 | |
727 | if (sdp->sd_lockstruct.ls_first) { | |
728 | unsigned int x; | |
729 | for (x = 0; x < sdp->sd_journals; x++) { | |
1d12d175 BP |
730 | struct gfs2_jdesc *jd = gfs2_jdesc_find(sdp, x); |
731 | ||
732 | if (sdp->sd_args.ar_spectator) { | |
733 | error = check_journal_clean(sdp, jd); | |
734 | if (error) | |
735 | goto fail_jinode_gh; | |
736 | continue; | |
737 | } | |
738 | error = gfs2_recover_journal(jd, true); | |
b3b94faa DT |
739 | if (error) { |
740 | fs_err(sdp, "error recovering journal %u: %d\n", | |
741 | x, error); | |
742 | goto fail_jinode_gh; | |
743 | } | |
744 | } | |
745 | ||
f057f6cd | 746 | gfs2_others_may_mount(sdp); |
b3b94faa | 747 | } else if (!sdp->sd_args.ar_spectator) { |
6ecd7c2d | 748 | error = gfs2_recover_journal(sdp->sd_jdesc, true); |
b3b94faa DT |
749 | if (error) { |
750 | fs_err(sdp, "error recovering my journal: %d\n", error); | |
751 | goto fail_jinode_gh; | |
752 | } | |
753 | } | |
754 | ||
086cc672 | 755 | sdp->sd_log_idle = 1; |
b3b94faa DT |
756 | set_bit(SDF_JOURNAL_CHECKED, &sdp->sd_flags); |
757 | gfs2_glock_dq_uninit(&ji_gh); | |
758 | jindex = 0; | |
2e60d768 | 759 | INIT_WORK(&sdp->sd_freeze_work, gfs2_freeze_func); |
b3b94faa DT |
760 | return 0; |
761 | ||
a91ea69f | 762 | fail_jinode_gh: |
b3b94faa DT |
763 | if (!sdp->sd_args.ar_spectator) |
764 | gfs2_glock_dq_uninit(&sdp->sd_jinode_gh); | |
a91ea69f | 765 | fail_journal_gh: |
b3b94faa DT |
766 | if (!sdp->sd_args.ar_spectator) |
767 | gfs2_glock_dq_uninit(&sdp->sd_journal_gh); | |
a91ea69f | 768 | fail_jindex: |
b3b94faa DT |
769 | gfs2_jindex_free(sdp); |
770 | if (jindex) | |
771 | gfs2_glock_dq_uninit(&ji_gh); | |
a91ea69f | 772 | fail: |
f42faf4f | 773 | iput(sdp->sd_jindex); |
b3b94faa DT |
774 | return error; |
775 | } | |
776 | ||
56aa72d0 | 777 | static struct lock_class_key gfs2_quota_imutex_key; |
b3b94faa DT |
778 | |
779 | static int init_inodes(struct gfs2_sbd *sdp, int undo) | |
780 | { | |
b3b94faa | 781 | int error = 0; |
2b0143b5 | 782 | struct inode *master = d_inode(sdp->sd_master_dir); |
b3b94faa DT |
783 | |
784 | if (undo) | |
f42faf4f SW |
785 | goto fail_qinode; |
786 | ||
f42faf4f | 787 | error = init_journal(sdp, undo); |
0e48e055 | 788 | complete_all(&sdp->sd_journal_ready); |
f42faf4f | 789 | if (error) |
9b8df98f | 790 | goto fail; |
b3b94faa | 791 | |
b3b94faa | 792 | /* Read in the master statfs inode */ |
9b8df98f | 793 | sdp->sd_statfs_inode = gfs2_lookup_simple(master, "statfs"); |
c752666c SW |
794 | if (IS_ERR(sdp->sd_statfs_inode)) { |
795 | error = PTR_ERR(sdp->sd_statfs_inode); | |
b3b94faa | 796 | fs_err(sdp, "can't read in statfs inode: %d\n", error); |
8d8291ae | 797 | goto fail_journal; |
b3b94faa DT |
798 | } |
799 | ||
800 | /* Read in the resource index inode */ | |
9b8df98f | 801 | sdp->sd_rindex = gfs2_lookup_simple(master, "rindex"); |
c752666c SW |
802 | if (IS_ERR(sdp->sd_rindex)) { |
803 | error = PTR_ERR(sdp->sd_rindex); | |
b3b94faa DT |
804 | fs_err(sdp, "can't get resource index inode: %d\n", error); |
805 | goto fail_statfs; | |
806 | } | |
cf45b752 | 807 | sdp->sd_rindex_uptodate = 0; |
b3b94faa DT |
808 | |
809 | /* Read in the quota inode */ | |
9b8df98f | 810 | sdp->sd_quota_inode = gfs2_lookup_simple(master, "quota"); |
c752666c SW |
811 | if (IS_ERR(sdp->sd_quota_inode)) { |
812 | error = PTR_ERR(sdp->sd_quota_inode); | |
b3b94faa DT |
813 | fs_err(sdp, "can't get quota file inode: %d\n", error); |
814 | goto fail_rindex; | |
815 | } | |
56aa72d0 | 816 | /* |
3e7aafc3 | 817 | * i_rwsem on quota files is special. Since this inode is hidden system |
56aa72d0 JK |
818 | * file, we are safe to define locking ourselves. |
819 | */ | |
9902af79 | 820 | lockdep_set_class(&sdp->sd_quota_inode->i_rwsem, |
56aa72d0 | 821 | &gfs2_quota_imutex_key); |
a365fbf3 SW |
822 | |
823 | error = gfs2_rindex_update(sdp); | |
824 | if (error) | |
825 | goto fail_qinode; | |
826 | ||
b3b94faa DT |
827 | return 0; |
828 | ||
f42faf4f SW |
829 | fail_qinode: |
830 | iput(sdp->sd_quota_inode); | |
f42faf4f | 831 | fail_rindex: |
b3b94faa | 832 | gfs2_clear_rgrpd(sdp); |
f42faf4f | 833 | iput(sdp->sd_rindex); |
f42faf4f SW |
834 | fail_statfs: |
835 | iput(sdp->sd_statfs_inode); | |
f42faf4f SW |
836 | fail_journal: |
837 | init_journal(sdp, UNDO); | |
f42faf4f | 838 | fail: |
b3b94faa DT |
839 | return error; |
840 | } | |
841 | ||
842 | static int init_per_node(struct gfs2_sbd *sdp, int undo) | |
843 | { | |
f42faf4f | 844 | struct inode *pn = NULL; |
b3b94faa DT |
845 | char buf[30]; |
846 | int error = 0; | |
5c676f6d | 847 | struct gfs2_inode *ip; |
2b0143b5 | 848 | struct inode *master = d_inode(sdp->sd_master_dir); |
b3b94faa DT |
849 | |
850 | if (sdp->sd_args.ar_spectator) | |
851 | return 0; | |
852 | ||
853 | if (undo) | |
854 | goto fail_qc_gh; | |
855 | ||
9b8df98f | 856 | pn = gfs2_lookup_simple(master, "per_node"); |
c752666c SW |
857 | if (IS_ERR(pn)) { |
858 | error = PTR_ERR(pn); | |
b3b94faa DT |
859 | fs_err(sdp, "can't find per_node directory: %d\n", error); |
860 | return error; | |
861 | } | |
862 | ||
b3b94faa | 863 | sprintf(buf, "statfs_change%u", sdp->sd_jdesc->jd_jid); |
c752666c SW |
864 | sdp->sd_sc_inode = gfs2_lookup_simple(pn, buf); |
865 | if (IS_ERR(sdp->sd_sc_inode)) { | |
866 | error = PTR_ERR(sdp->sd_sc_inode); | |
b3b94faa | 867 | fs_err(sdp, "can't find local \"sc\" file: %d\n", error); |
8d8291ae | 868 | goto fail; |
b3b94faa DT |
869 | } |
870 | ||
b3b94faa | 871 | sprintf(buf, "quota_change%u", sdp->sd_jdesc->jd_jid); |
c752666c SW |
872 | sdp->sd_qc_inode = gfs2_lookup_simple(pn, buf); |
873 | if (IS_ERR(sdp->sd_qc_inode)) { | |
874 | error = PTR_ERR(sdp->sd_qc_inode); | |
b3b94faa DT |
875 | fs_err(sdp, "can't find local \"qc\" file: %d\n", error); |
876 | goto fail_ut_i; | |
877 | } | |
878 | ||
f42faf4f | 879 | iput(pn); |
b3b94faa DT |
880 | pn = NULL; |
881 | ||
feaa7bba | 882 | ip = GFS2_I(sdp->sd_sc_inode); |
8d8291ae | 883 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, |
b3b94faa DT |
884 | &sdp->sd_sc_gh); |
885 | if (error) { | |
886 | fs_err(sdp, "can't lock local \"sc\" file: %d\n", error); | |
8d8291ae | 887 | goto fail_qc_i; |
b3b94faa DT |
888 | } |
889 | ||
feaa7bba | 890 | ip = GFS2_I(sdp->sd_qc_inode); |
8d8291ae | 891 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, |
b3b94faa DT |
892 | &sdp->sd_qc_gh); |
893 | if (error) { | |
894 | fs_err(sdp, "can't lock local \"qc\" file: %d\n", error); | |
895 | goto fail_ut_gh; | |
896 | } | |
897 | ||
898 | return 0; | |
899 | ||
a91ea69f | 900 | fail_qc_gh: |
b3b94faa | 901 | gfs2_glock_dq_uninit(&sdp->sd_qc_gh); |
a91ea69f | 902 | fail_ut_gh: |
b3b94faa | 903 | gfs2_glock_dq_uninit(&sdp->sd_sc_gh); |
a91ea69f | 904 | fail_qc_i: |
f42faf4f | 905 | iput(sdp->sd_qc_inode); |
a91ea69f | 906 | fail_ut_i: |
f42faf4f | 907 | iput(sdp->sd_sc_inode); |
a91ea69f | 908 | fail: |
6fde2242 | 909 | iput(pn); |
b3b94faa DT |
910 | return error; |
911 | } | |
912 | ||
f057f6cd SW |
913 | static const match_table_t nolock_tokens = { |
914 | { Opt_jid, "jid=%d\n", }, | |
915 | { Opt_err, NULL }, | |
916 | }; | |
917 | ||
918 | static const struct lm_lockops nolock_ops = { | |
919 | .lm_proto_name = "lock_nolock", | |
fc0e38da | 920 | .lm_put_lock = gfs2_glock_free, |
f057f6cd SW |
921 | .lm_tokens = &nolock_tokens, |
922 | }; | |
923 | ||
da755fdb SW |
924 | /** |
925 | * gfs2_lm_mount - mount a locking protocol | |
926 | * @sdp: the filesystem | |
3ad2f3fb | 927 | * @args: mount arguments |
da755fdb SW |
928 | * @silent: if 1, don't complain if the FS isn't a GFS2 fs |
929 | * | |
930 | * Returns: errno | |
931 | */ | |
932 | ||
933 | static int gfs2_lm_mount(struct gfs2_sbd *sdp, int silent) | |
934 | { | |
f057f6cd SW |
935 | const struct lm_lockops *lm; |
936 | struct lm_lockstruct *ls = &sdp->sd_lockstruct; | |
937 | struct gfs2_args *args = &sdp->sd_args; | |
938 | const char *proto = sdp->sd_proto_name; | |
939 | const char *table = sdp->sd_table_name; | |
f057f6cd SW |
940 | char *o, *options; |
941 | int ret; | |
da755fdb | 942 | |
f057f6cd SW |
943 | if (!strcmp("lock_nolock", proto)) { |
944 | lm = &nolock_ops; | |
945 | sdp->sd_args.ar_localflocks = 1; | |
f057f6cd SW |
946 | #ifdef CONFIG_GFS2_FS_LOCKING_DLM |
947 | } else if (!strcmp("lock_dlm", proto)) { | |
948 | lm = &gfs2_dlm_ops; | |
949 | #endif | |
950 | } else { | |
d77d1b58 | 951 | pr_info("can't find protocol %s\n", proto); |
f057f6cd SW |
952 | return -ENOENT; |
953 | } | |
da755fdb SW |
954 | |
955 | fs_info(sdp, "Trying to join cluster \"%s\", \"%s\"\n", proto, table); | |
956 | ||
f057f6cd SW |
957 | ls->ls_ops = lm; |
958 | ls->ls_first = 1; | |
da755fdb | 959 | |
f057f6cd SW |
960 | for (options = args->ar_hostdata; (o = strsep(&options, ":")); ) { |
961 | substring_t tmp[MAX_OPT_ARGS]; | |
962 | int token, option; | |
963 | ||
964 | if (!o || !*o) | |
965 | continue; | |
966 | ||
967 | token = match_token(o, *lm->lm_tokens, tmp); | |
968 | switch (token) { | |
969 | case Opt_jid: | |
970 | ret = match_int(&tmp[0], &option); | |
971 | if (ret || option < 0) | |
972 | goto hostdata_error; | |
ba6e9364 SW |
973 | if (test_and_clear_bit(SDF_NOJOURNALID, &sdp->sd_flags)) |
974 | ls->ls_jid = option; | |
f057f6cd SW |
975 | break; |
976 | case Opt_id: | |
4875647a | 977 | case Opt_nodir: |
2b88f7c5 | 978 | /* Obsolete, but left for backward compat purposes */ |
f057f6cd SW |
979 | break; |
980 | case Opt_first: | |
981 | ret = match_int(&tmp[0], &option); | |
982 | if (ret || (option != 0 && option != 1)) | |
983 | goto hostdata_error; | |
984 | ls->ls_first = option; | |
985 | break; | |
f057f6cd SW |
986 | case Opt_err: |
987 | default: | |
988 | hostdata_error: | |
989 | fs_info(sdp, "unknown hostdata (%s)\n", o); | |
990 | return -EINVAL; | |
991 | } | |
da755fdb SW |
992 | } |
993 | ||
f057f6cd SW |
994 | if (lm->lm_mount == NULL) { |
995 | fs_info(sdp, "Now mounting FS...\n"); | |
19237039 | 996 | complete_all(&sdp->sd_locking_init); |
f057f6cd | 997 | return 0; |
da755fdb | 998 | } |
e0c2a9aa | 999 | ret = lm->lm_mount(sdp, table); |
f057f6cd SW |
1000 | if (ret == 0) |
1001 | fs_info(sdp, "Joined cluster. Now mounting FS...\n"); | |
19237039 | 1002 | complete_all(&sdp->sd_locking_init); |
f057f6cd | 1003 | return ret; |
da755fdb SW |
1004 | } |
1005 | ||
1006 | void gfs2_lm_unmount(struct gfs2_sbd *sdp) | |
1007 | { | |
f057f6cd | 1008 | const struct lm_lockops *lm = sdp->sd_lockstruct.ls_ops; |
04aea0ca | 1009 | if (likely(!test_bit(SDF_WITHDRAWN, &sdp->sd_flags)) && |
f057f6cd SW |
1010 | lm->lm_unmount) |
1011 | lm->lm_unmount(sdp); | |
da755fdb | 1012 | } |
b3b94faa | 1013 | |
ba6e9364 SW |
1014 | static int wait_on_journal(struct gfs2_sbd *sdp) |
1015 | { | |
ba6e9364 SW |
1016 | if (sdp->sd_lockstruct.ls_ops->lm_mount == NULL) |
1017 | return 0; | |
1018 | ||
74316201 N |
1019 | return wait_on_bit(&sdp->sd_flags, SDF_NOJOURNALID, TASK_INTERRUPTIBLE) |
1020 | ? -EINTR : 0; | |
ba6e9364 SW |
1021 | } |
1022 | ||
8633ecfa SW |
1023 | void gfs2_online_uevent(struct gfs2_sbd *sdp) |
1024 | { | |
1025 | struct super_block *sb = sdp->sd_vfs; | |
1026 | char ro[20]; | |
1027 | char spectator[20]; | |
1028 | char *envp[] = { ro, spectator, NULL }; | |
bc98a42c | 1029 | sprintf(ro, "RDONLY=%d", sb_rdonly(sb)); |
8633ecfa SW |
1030 | sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0); |
1031 | kobject_uevent_env(&sdp->sd_kobj, KOBJ_ONLINE, envp); | |
1032 | } | |
1033 | ||
b3b94faa | 1034 | /** |
1f52aa08 | 1035 | * gfs2_fill_super - Read in superblock |
b3b94faa | 1036 | * @sb: The VFS superblock |
1f52aa08 | 1037 | * @args: Mount options |
b3b94faa DT |
1038 | * @silent: Don't complain if it's not a GFS2 filesystem |
1039 | * | |
1f52aa08 | 1040 | * Returns: -errno |
b3b94faa | 1041 | */ |
1f52aa08 | 1042 | static int gfs2_fill_super(struct super_block *sb, struct fs_context *fc) |
b3b94faa | 1043 | { |
1f52aa08 AP |
1044 | struct gfs2_args *args = fc->fs_private; |
1045 | int silent = fc->sb_flags & SB_SILENT; | |
b3b94faa DT |
1046 | struct gfs2_sbd *sdp; |
1047 | struct gfs2_holder mount_gh; | |
1048 | int error; | |
1049 | ||
1050 | sdp = init_sbd(sb); | |
1051 | if (!sdp) { | |
d77d1b58 | 1052 | pr_warn("can't alloc struct gfs2_sbd\n"); |
b3b94faa DT |
1053 | return -ENOMEM; |
1054 | } | |
f55073ff | 1055 | sdp->sd_args = *args; |
b3b94faa | 1056 | |
fe64d517 | 1057 | if (sdp->sd_args.ar_spectator) { |
1751e8a6 | 1058 | sb->s_flags |= SB_RDONLY; |
e8ca5cc5 | 1059 | set_bit(SDF_RORECOVERY, &sdp->sd_flags); |
fe64d517 | 1060 | } |
6f04c1c7 | 1061 | if (sdp->sd_args.ar_posix_acl) |
1751e8a6 | 1062 | sb->s_flags |= SB_POSIXACL; |
f25934c5 CH |
1063 | if (sdp->sd_args.ar_nobarrier) |
1064 | set_bit(SDF_NOBARRIERS, &sdp->sd_flags); | |
6f04c1c7 | 1065 | |
1751e8a6 | 1066 | sb->s_flags |= SB_NOSEC; |
719ee344 SW |
1067 | sb->s_magic = GFS2_MAGIC; |
1068 | sb->s_op = &gfs2_super_ops; | |
41ced6dc | 1069 | sb->s_d_op = &gfs2_dops; |
719ee344 | 1070 | sb->s_export_op = &gfs2_export_ops; |
40b78a32 | 1071 | sb->s_xattr = gfs2_xattr_handlers; |
cc632e7f | 1072 | sb->s_qcop = &gfs2_quotactl_ops; |
de3b08d3 | 1073 | sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP; |
cc632e7f | 1074 | sb_dqopt(sb)->flags |= DQUOT_QUOTA_SYS_FILE; |
719ee344 SW |
1075 | sb->s_time_gran = 1; |
1076 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
419c93e0 SW |
1077 | |
1078 | /* Set up the buffer cache and fill in some fake block size values | |
1079 | to allow us to read-in the on-disk superblock. */ | |
1080 | sdp->sd_sb.sb_bsize = sb_min_blocksize(sb, GFS2_BASIC_BLOCK); | |
1081 | sdp->sd_sb.sb_bsize_shift = sb->s_blocksize_bits; | |
1082 | sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift - | |
1083 | GFS2_BASIC_BLOCK_SHIFT; | |
47a9a527 | 1084 | sdp->sd_fsb2bb = BIT(sdp->sd_fsb2bb_shift); |
b3b94faa | 1085 | |
5e687eac | 1086 | sdp->sd_tune.gt_logd_secs = sdp->sd_args.ar_commit; |
3d3c10f2 BM |
1087 | sdp->sd_tune.gt_quota_quantum = sdp->sd_args.ar_quota_quantum; |
1088 | if (sdp->sd_args.ar_statfs_quantum) { | |
1089 | sdp->sd_tune.gt_statfs_slow = 0; | |
1090 | sdp->sd_tune.gt_statfs_quantum = sdp->sd_args.ar_statfs_quantum; | |
32e471ef | 1091 | } else { |
3d3c10f2 BM |
1092 | sdp->sd_tune.gt_statfs_slow = 1; |
1093 | sdp->sd_tune.gt_statfs_quantum = 30; | |
1094 | } | |
48c2b613 | 1095 | |
b3b94faa | 1096 | error = init_names(sdp, silent); |
0d515210 BP |
1097 | if (error) { |
1098 | /* In this case, we haven't initialized sysfs, so we have to | |
1099 | manually free the sdp. */ | |
2a27b755 | 1100 | free_sbd(sdp); |
0d515210 BP |
1101 | sb->s_fs_info = NULL; |
1102 | return error; | |
1103 | } | |
b3b94faa | 1104 | |
561b7969 | 1105 | snprintf(sdp->sd_fsname, sizeof(sdp->sd_fsname), "%s", sdp->sd_table_name); |
e0c2a9aa | 1106 | |
b3b94faa | 1107 | error = gfs2_sys_fs_add(sdp); |
0d515210 BP |
1108 | /* |
1109 | * If we hit an error here, gfs2_sys_fs_add will have called function | |
1110 | * kobject_put which causes the sysfs usage count to go to zero, which | |
1111 | * causes sysfs to call function gfs2_sbd_release, which frees sdp. | |
1112 | * Subsequent error paths here will call gfs2_sys_fs_del, which also | |
1113 | * kobject_put to free sdp. | |
1114 | */ | |
b3b94faa | 1115 | if (error) |
0d515210 BP |
1116 | return error; |
1117 | ||
1118 | gfs2_create_debugfs_file(sdp); | |
b3b94faa DT |
1119 | |
1120 | error = gfs2_lm_mount(sdp, silent); | |
1121 | if (error) | |
0d515210 | 1122 | goto fail_debug; |
b3b94faa DT |
1123 | |
1124 | error = init_locking(sdp, &mount_gh, DO); | |
1125 | if (error) | |
1126 | goto fail_lm; | |
1127 | ||
9b8df98f | 1128 | error = init_sb(sdp, silent); |
b3b94faa DT |
1129 | if (error) |
1130 | goto fail_locking; | |
b3b94faa | 1131 | |
ba6e9364 SW |
1132 | error = wait_on_journal(sdp); |
1133 | if (error) | |
1134 | goto fail_sb; | |
1135 | ||
feb47ca9 SW |
1136 | /* |
1137 | * If user space has failed to join the cluster or some similar | |
1138 | * failure has occurred, then the journal id will contain a | |
1139 | * negative (error) number. This will then be returned to the | |
1140 | * caller (of the mount syscall). We do this even for spectator | |
1141 | * mounts (which just write a jid of 0 to indicate "ok" even though | |
1142 | * the jid is unused in the spectator case) | |
1143 | */ | |
1144 | if (sdp->sd_lockstruct.ls_jid < 0) { | |
1145 | error = sdp->sd_lockstruct.ls_jid; | |
1146 | sdp->sd_lockstruct.ls_jid = 0; | |
1147 | goto fail_sb; | |
1148 | } | |
1149 | ||
e0c2a9aa | 1150 | if (sdp->sd_args.ar_spectator) |
561b7969 | 1151 | snprintf(sdp->sd_fsname, sizeof(sdp->sd_fsname), "%s.s", |
e0c2a9aa DT |
1152 | sdp->sd_table_name); |
1153 | else | |
561b7969 | 1154 | snprintf(sdp->sd_fsname, sizeof(sdp->sd_fsname), "%s.%u", |
e0c2a9aa DT |
1155 | sdp->sd_table_name, sdp->sd_lockstruct.ls_jid); |
1156 | ||
b3b94faa DT |
1157 | error = init_inodes(sdp, DO); |
1158 | if (error) | |
f42faf4f | 1159 | goto fail_sb; |
b3b94faa DT |
1160 | |
1161 | error = init_per_node(sdp, DO); | |
1162 | if (error) | |
1163 | goto fail_inodes; | |
1164 | ||
1165 | error = gfs2_statfs_init(sdp); | |
1166 | if (error) { | |
1167 | fs_err(sdp, "can't initialize statfs subsystem: %d\n", error); | |
1168 | goto fail_per_node; | |
1169 | } | |
1170 | ||
bc98a42c | 1171 | if (!sb_rdonly(sb)) { |
b3b94faa DT |
1172 | error = gfs2_make_fs_rw(sdp); |
1173 | if (error) { | |
1174 | fs_err(sdp, "can't make FS RW: %d\n", error); | |
8ad151c2 | 1175 | goto fail_per_node; |
b3b94faa DT |
1176 | } |
1177 | } | |
1178 | ||
1179 | gfs2_glock_dq_uninit(&mount_gh); | |
8633ecfa | 1180 | gfs2_online_uevent(sdp); |
b3b94faa DT |
1181 | return 0; |
1182 | ||
a91ea69f | 1183 | fail_per_node: |
b3b94faa | 1184 | init_per_node(sdp, UNDO); |
a91ea69f | 1185 | fail_inodes: |
b3b94faa | 1186 | init_inodes(sdp, UNDO); |
a91ea69f | 1187 | fail_sb: |
9b8df98f SW |
1188 | if (sdp->sd_root_dir) |
1189 | dput(sdp->sd_root_dir); | |
1190 | if (sdp->sd_master_dir) | |
1191 | dput(sdp->sd_master_dir); | |
e7c8707e SW |
1192 | if (sb->s_root) |
1193 | dput(sb->s_root); | |
9b8df98f | 1194 | sb->s_root = NULL; |
a91ea69f | 1195 | fail_locking: |
b3b94faa | 1196 | init_locking(sdp, &mount_gh, UNDO); |
a91ea69f | 1197 | fail_lm: |
0e48e055 | 1198 | complete_all(&sdp->sd_journal_ready); |
fefc03bf | 1199 | gfs2_gl_hash_clear(sdp); |
b3b94faa | 1200 | gfs2_lm_unmount(sdp); |
0d515210 | 1201 | fail_debug: |
5f882096 | 1202 | gfs2_delete_debugfs_file(sdp); |
0d515210 BP |
1203 | /* gfs2_sys_fs_del must be the last thing we do, since it causes |
1204 | * sysfs to call function gfs2_sbd_release, which frees sdp. */ | |
1205 | gfs2_sys_fs_del(sdp); | |
5c676f6d | 1206 | sb->s_fs_info = NULL; |
b3b94faa DT |
1207 | return error; |
1208 | } | |
1209 | ||
1f52aa08 AP |
1210 | /** |
1211 | * gfs2_get_tree - Get the GFS2 superblock and root directory | |
1212 | * @fc: The filesystem context | |
1213 | * | |
1214 | * Returns: 0 or -errno on error | |
1215 | */ | |
1216 | static int gfs2_get_tree(struct fs_context *fc) | |
b3b94faa | 1217 | { |
1f52aa08 AP |
1218 | struct gfs2_args *args = fc->fs_private; |
1219 | struct gfs2_sbd *sdp; | |
1220 | int error; | |
1221 | ||
1222 | error = get_tree_bdev(fc, gfs2_fill_super); | |
1223 | if (error) | |
1224 | return error; | |
1225 | ||
1226 | sdp = fc->root->d_sb->s_fs_info; | |
1227 | dput(fc->root); | |
1228 | if (args->ar_meta) | |
1229 | fc->root = dget(sdp->sd_master_dir); | |
1230 | else | |
1231 | fc->root = dget(sdp->sd_root_dir); | |
f55073ff | 1232 | return 0; |
86384605 AD |
1233 | } |
1234 | ||
1f52aa08 | 1235 | static void gfs2_fc_free(struct fs_context *fc) |
f6d03139 | 1236 | { |
1f52aa08 AP |
1237 | struct gfs2_args *args = fc->fs_private; |
1238 | ||
1239 | kfree(args); | |
f6d03139 SW |
1240 | } |
1241 | ||
1f52aa08 AP |
1242 | enum gfs2_param { |
1243 | Opt_lockproto, | |
1244 | Opt_locktable, | |
1245 | Opt_hostdata, | |
1246 | Opt_spectator, | |
1247 | Opt_ignore_local_fs, | |
1248 | Opt_localflocks, | |
1249 | Opt_localcaching, | |
1250 | Opt_debug, | |
1251 | Opt_upgrade, | |
1252 | Opt_acl, | |
1253 | Opt_quota, | |
1254 | Opt_suiddir, | |
1255 | Opt_data, | |
1256 | Opt_meta, | |
1257 | Opt_discard, | |
1258 | Opt_commit, | |
1259 | Opt_errors, | |
1260 | Opt_statfs_quantum, | |
1261 | Opt_statfs_percent, | |
1262 | Opt_quota_quantum, | |
1263 | Opt_barrier, | |
1264 | Opt_rgrplvb, | |
1265 | Opt_loccookie, | |
1266 | }; | |
f55073ff | 1267 | |
1f52aa08 AP |
1268 | enum opt_quota { |
1269 | Opt_quota_unset = 0, | |
1270 | Opt_quota_off, | |
1271 | Opt_quota_account, | |
1272 | Opt_quota_on, | |
1273 | }; | |
1274 | ||
1275 | static const unsigned int opt_quota_values[] = { | |
1276 | [Opt_quota_off] = GFS2_QUOTA_OFF, | |
1277 | [Opt_quota_account] = GFS2_QUOTA_ACCOUNT, | |
1278 | [Opt_quota_on] = GFS2_QUOTA_ON, | |
1279 | }; | |
f55073ff | 1280 | |
1f52aa08 AP |
1281 | enum opt_data { |
1282 | Opt_data_writeback = GFS2_DATA_WRITEBACK, | |
1283 | Opt_data_ordered = GFS2_DATA_ORDERED, | |
1284 | }; | |
f55073ff | 1285 | |
1f52aa08 AP |
1286 | enum opt_errors { |
1287 | Opt_errors_withdraw = GFS2_ERRORS_WITHDRAW, | |
1288 | Opt_errors_panic = GFS2_ERRORS_PANIC, | |
1289 | }; | |
f55073ff | 1290 | |
1f52aa08 AP |
1291 | static const struct fs_parameter_spec gfs2_param_specs[] = { |
1292 | fsparam_string ("lockproto", Opt_lockproto), | |
1293 | fsparam_string ("locktable", Opt_locktable), | |
1294 | fsparam_string ("hostdata", Opt_hostdata), | |
1295 | fsparam_flag ("spectator", Opt_spectator), | |
1296 | fsparam_flag ("norecovery", Opt_spectator), | |
1297 | fsparam_flag ("ignore_local_fs", Opt_ignore_local_fs), | |
1298 | fsparam_flag ("localflocks", Opt_localflocks), | |
1299 | fsparam_flag ("localcaching", Opt_localcaching), | |
1300 | fsparam_flag_no("debug", Opt_debug), | |
1301 | fsparam_flag ("upgrade", Opt_upgrade), | |
1302 | fsparam_flag_no("acl", Opt_acl), | |
1303 | fsparam_flag_no("suiddir", Opt_suiddir), | |
1304 | fsparam_enum ("data", Opt_data), | |
1305 | fsparam_flag ("meta", Opt_meta), | |
1306 | fsparam_flag_no("discard", Opt_discard), | |
1307 | fsparam_s32 ("commit", Opt_commit), | |
1308 | fsparam_enum ("errors", Opt_errors), | |
1309 | fsparam_s32 ("statfs_quantum", Opt_statfs_quantum), | |
1310 | fsparam_s32 ("statfs_percent", Opt_statfs_percent), | |
1311 | fsparam_s32 ("quota_quantum", Opt_quota_quantum), | |
1312 | fsparam_flag_no("barrier", Opt_barrier), | |
1313 | fsparam_flag_no("rgrplvb", Opt_rgrplvb), | |
1314 | fsparam_flag_no("loccookie", Opt_loccookie), | |
1315 | /* quota can be a flag or an enum so it gets special treatment */ | |
1316 | __fsparam(fs_param_is_enum, "quota", Opt_quota, fs_param_neg_with_no|fs_param_v_optional), | |
1317 | {} | |
1318 | }; | |
8bcbbf00 | 1319 | |
1f52aa08 AP |
1320 | static const struct fs_parameter_enum gfs2_param_enums[] = { |
1321 | { Opt_quota, "off", Opt_quota_off }, | |
1322 | { Opt_quota, "account", Opt_quota_account }, | |
1323 | { Opt_quota, "on", Opt_quota_on }, | |
1324 | { Opt_data, "writeback", Opt_data_writeback }, | |
1325 | { Opt_data, "ordered", Opt_data_ordered }, | |
1326 | { Opt_errors, "withdraw", Opt_errors_withdraw }, | |
1327 | { Opt_errors, "panic", Opt_errors_panic }, | |
1328 | {} | |
1329 | }; | |
f55073ff | 1330 | |
1f52aa08 AP |
1331 | const struct fs_parameter_description gfs2_fs_parameters = { |
1332 | .name = "gfs2", | |
1333 | .specs = gfs2_param_specs, | |
1334 | .enums = gfs2_param_enums, | |
1335 | }; | |
1336 | ||
1337 | /* Parse a single mount parameter */ | |
1338 | static int gfs2_parse_param(struct fs_context *fc, struct fs_parameter *param) | |
1339 | { | |
1340 | struct gfs2_args *args = fc->fs_private; | |
1341 | struct fs_parse_result result; | |
1342 | int o; | |
1343 | ||
1344 | o = fs_parse(fc, &gfs2_fs_parameters, param, &result); | |
1345 | if (o < 0) | |
1346 | return o; | |
1347 | ||
1348 | switch (o) { | |
1349 | case Opt_lockproto: | |
1350 | strlcpy(args->ar_lockproto, param->string, GFS2_LOCKNAME_LEN); | |
1351 | break; | |
1352 | case Opt_locktable: | |
1353 | strlcpy(args->ar_locktable, param->string, GFS2_LOCKNAME_LEN); | |
1354 | break; | |
1355 | case Opt_hostdata: | |
1356 | strlcpy(args->ar_hostdata, param->string, GFS2_LOCKNAME_LEN); | |
1357 | break; | |
1358 | case Opt_spectator: | |
1359 | args->ar_spectator = 1; | |
1360 | break; | |
1361 | case Opt_ignore_local_fs: | |
1362 | /* Retained for backwards compat only */ | |
1363 | break; | |
1364 | case Opt_localflocks: | |
1365 | args->ar_localflocks = 1; | |
1366 | break; | |
1367 | case Opt_localcaching: | |
1368 | /* Retained for backwards compat only */ | |
1369 | break; | |
1370 | case Opt_debug: | |
1371 | if (result.boolean && args->ar_errors == GFS2_ERRORS_PANIC) | |
1372 | return invalf(fc, "gfs2: -o debug and -o errors=panic are mutually exclusive"); | |
1373 | args->ar_debug = result.boolean; | |
1374 | break; | |
1375 | case Opt_upgrade: | |
1376 | /* Retained for backwards compat only */ | |
1377 | break; | |
1378 | case Opt_acl: | |
1379 | args->ar_posix_acl = result.boolean; | |
1380 | break; | |
1381 | case Opt_quota: | |
1382 | /* The quota option can be a flag or an enum. A non-zero int_32 | |
1383 | result means that we have an enum index. Otherwise we have | |
1384 | to rely on the 'negated' flag to tell us whether 'quota' or | |
1385 | 'noquota' was specified. */ | |
1386 | if (result.negated) | |
1387 | args->ar_quota = GFS2_QUOTA_OFF; | |
1388 | else if (result.int_32 > 0) | |
1389 | args->ar_quota = opt_quota_values[result.int_32]; | |
1390 | else | |
1391 | args->ar_quota = GFS2_QUOTA_ON; | |
1392 | break; | |
1393 | case Opt_suiddir: | |
1394 | args->ar_suiddir = result.boolean; | |
1395 | break; | |
1396 | case Opt_data: | |
1397 | /* The uint_32 result maps directly to GFS2_DATA_* */ | |
1398 | args->ar_data = result.uint_32; | |
1399 | break; | |
1400 | case Opt_meta: | |
1401 | args->ar_meta = 1; | |
1402 | break; | |
1403 | case Opt_discard: | |
1404 | args->ar_discard = result.boolean; | |
1405 | break; | |
1406 | case Opt_commit: | |
1407 | if (result.int_32 <= 0) | |
1408 | return invalf(fc, "gfs2: commit mount option requires a positive numeric argument"); | |
1409 | args->ar_commit = result.int_32; | |
1410 | break; | |
1411 | case Opt_statfs_quantum: | |
1412 | if (result.int_32 < 0) | |
1413 | return invalf(fc, "gfs2: statfs_quantum mount option requires a non-negative numeric argument"); | |
1414 | args->ar_statfs_quantum = result.int_32; | |
1415 | break; | |
1416 | case Opt_quota_quantum: | |
1417 | if (result.int_32 <= 0) | |
1418 | return invalf(fc, "gfs2: quota_quantum mount option requires a positive numeric argument"); | |
1419 | args->ar_quota_quantum = result.int_32; | |
1420 | break; | |
1421 | case Opt_statfs_percent: | |
1422 | if (result.int_32 < 0 || result.int_32 > 100) | |
1423 | return invalf(fc, "gfs2: statfs_percent mount option requires a numeric argument between 0 and 100"); | |
1424 | args->ar_statfs_percent = result.int_32; | |
1425 | break; | |
1426 | case Opt_errors: | |
1427 | if (args->ar_debug && result.uint_32 == GFS2_ERRORS_PANIC) | |
1428 | return invalf(fc, "gfs2: -o debug and -o errors=panic are mutually exclusive"); | |
1429 | args->ar_errors = result.uint_32; | |
1430 | break; | |
1431 | case Opt_barrier: | |
1432 | args->ar_nobarrier = result.boolean; | |
1433 | break; | |
1434 | case Opt_rgrplvb: | |
1435 | args->ar_rgrplvb = result.boolean; | |
1436 | break; | |
1437 | case Opt_loccookie: | |
1438 | args->ar_loccookie = result.boolean; | |
1439 | break; | |
1440 | default: | |
1441 | return invalf(fc, "gfs2: invalid mount option: %s", param->key); | |
f55073ff | 1442 | } |
1f52aa08 AP |
1443 | return 0; |
1444 | } | |
f55073ff | 1445 | |
1f52aa08 AP |
1446 | static int gfs2_reconfigure(struct fs_context *fc) |
1447 | { | |
1448 | struct super_block *sb = fc->root->d_sb; | |
1449 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
1450 | struct gfs2_args *oldargs = &sdp->sd_args; | |
1451 | struct gfs2_args *newargs = fc->fs_private; | |
1452 | struct gfs2_tune *gt = &sdp->sd_tune; | |
1453 | int error = 0; | |
1454 | ||
1455 | sync_filesystem(sb); | |
1456 | ||
1457 | spin_lock(>->gt_spin); | |
1458 | oldargs->ar_commit = gt->gt_logd_secs; | |
1459 | oldargs->ar_quota_quantum = gt->gt_quota_quantum; | |
1460 | if (gt->gt_statfs_slow) | |
1461 | oldargs->ar_statfs_quantum = 0; | |
1462 | else | |
1463 | oldargs->ar_statfs_quantum = gt->gt_statfs_quantum; | |
1464 | spin_unlock(>->gt_spin); | |
1465 | ||
1466 | if (strcmp(newargs->ar_lockproto, oldargs->ar_lockproto)) { | |
1467 | errorf(fc, "gfs2: reconfiguration of locking protocol not allowed"); | |
1468 | return -EINVAL; | |
1469 | } | |
1470 | if (strcmp(newargs->ar_locktable, oldargs->ar_locktable)) { | |
1471 | errorf(fc, "gfs2: reconfiguration of lock table not allowed"); | |
1472 | return -EINVAL; | |
1473 | } | |
1474 | if (strcmp(newargs->ar_hostdata, oldargs->ar_hostdata)) { | |
1475 | errorf(fc, "gfs2: reconfiguration of host data not allowed"); | |
1476 | return -EINVAL; | |
1477 | } | |
1478 | if (newargs->ar_spectator != oldargs->ar_spectator) { | |
1479 | errorf(fc, "gfs2: reconfiguration of spectator mode not allowed"); | |
1480 | return -EINVAL; | |
1481 | } | |
1482 | if (newargs->ar_localflocks != oldargs->ar_localflocks) { | |
1483 | errorf(fc, "gfs2: reconfiguration of localflocks not allowed"); | |
1484 | return -EINVAL; | |
1485 | } | |
1486 | if (newargs->ar_meta != oldargs->ar_meta) { | |
1487 | errorf(fc, "gfs2: switching between gfs2 and gfs2meta not allowed"); | |
1488 | return -EINVAL; | |
1489 | } | |
1490 | if (oldargs->ar_spectator) | |
1491 | fc->sb_flags |= SB_RDONLY; | |
1492 | ||
1493 | if ((sb->s_flags ^ fc->sb_flags) & SB_RDONLY) { | |
1494 | if (fc->sb_flags & SB_RDONLY) { | |
1495 | error = gfs2_make_fs_ro(sdp); | |
1496 | if (error) | |
1497 | errorf(fc, "gfs2: unable to remount read-only"); | |
1498 | } else { | |
1499 | error = gfs2_make_fs_rw(sdp); | |
1500 | if (error) | |
1501 | errorf(fc, "gfs2: unable to remount read-write"); | |
1502 | } | |
f55073ff | 1503 | } |
1f52aa08 | 1504 | sdp->sd_args = *newargs; |
f55073ff | 1505 | |
1f52aa08 AP |
1506 | if (sdp->sd_args.ar_posix_acl) |
1507 | sb->s_flags |= SB_POSIXACL; | |
1508 | else | |
1509 | sb->s_flags &= ~SB_POSIXACL; | |
1510 | if (sdp->sd_args.ar_nobarrier) | |
1511 | set_bit(SDF_NOBARRIERS, &sdp->sd_flags); | |
f55073ff | 1512 | else |
1f52aa08 AP |
1513 | clear_bit(SDF_NOBARRIERS, &sdp->sd_flags); |
1514 | spin_lock(>->gt_spin); | |
1515 | gt->gt_logd_secs = newargs->ar_commit; | |
1516 | gt->gt_quota_quantum = newargs->ar_quota_quantum; | |
1517 | if (newargs->ar_statfs_quantum) { | |
1518 | gt->gt_statfs_slow = 0; | |
1519 | gt->gt_statfs_quantum = newargs->ar_statfs_quantum; | |
1520 | } | |
1521 | else { | |
1522 | gt->gt_statfs_slow = 1; | |
1523 | gt->gt_statfs_quantum = 30; | |
1524 | } | |
1525 | spin_unlock(>->gt_spin); | |
1526 | ||
1527 | gfs2_online_uevent(sdp); | |
1528 | return error; | |
1529 | } | |
1530 | ||
1531 | static const struct fs_context_operations gfs2_context_ops = { | |
1532 | .free = gfs2_fc_free, | |
1533 | .parse_param = gfs2_parse_param, | |
1534 | .get_tree = gfs2_get_tree, | |
1535 | .reconfigure = gfs2_reconfigure, | |
1536 | }; | |
1537 | ||
1538 | /* Set up the filesystem mount context */ | |
1539 | static int gfs2_init_fs_context(struct fs_context *fc) | |
1540 | { | |
1541 | struct gfs2_args *args; | |
1542 | ||
1543 | args = kzalloc(sizeof(*args), GFP_KERNEL); | |
1544 | if (args == NULL) | |
1545 | return -ENOMEM; | |
1546 | ||
1547 | args->ar_quota = GFS2_QUOTA_DEFAULT; | |
1548 | args->ar_data = GFS2_DATA_DEFAULT; | |
1549 | args->ar_commit = 30; | |
1550 | args->ar_statfs_quantum = 30; | |
1551 | args->ar_quota_quantum = 60; | |
1552 | args->ar_errors = GFS2_ERRORS_DEFAULT; | |
1553 | ||
1554 | fc->fs_private = args; | |
1555 | fc->ops = &gfs2_context_ops; | |
1556 | return 0; | |
f55073ff SW |
1557 | } |
1558 | ||
1f52aa08 | 1559 | static int set_meta_super(struct super_block *s, struct fs_context *fc) |
f6d03139 SW |
1560 | { |
1561 | return -EINVAL; | |
1562 | } | |
1563 | ||
1f52aa08 AP |
1564 | static int test_meta_super(struct super_block *s, struct fs_context *fc) |
1565 | { | |
1566 | return (fc->sget_key == s->s_bdev); | |
1567 | } | |
1568 | ||
1569 | static int gfs2_meta_get_tree(struct fs_context *fc) | |
86384605 | 1570 | { |
f6d03139 | 1571 | struct super_block *s; |
003dec89 | 1572 | struct gfs2_sbd *sdp; |
e24977d4 | 1573 | struct path path; |
86384605 | 1574 | int error; |
907b9bce | 1575 | |
1f52aa08 AP |
1576 | if (!fc->source || !*fc->source) |
1577 | return -EINVAL; | |
3df629d8 | 1578 | |
1f52aa08 | 1579 | error = kern_path(fc->source, LOOKUP_FOLLOW, &path); |
86384605 | 1580 | if (error) { |
d77d1b58 | 1581 | pr_warn("path_lookup on %s returned error %d\n", |
1f52aa08 AP |
1582 | fc->source, error); |
1583 | return error; | |
86384605 | 1584 | } |
1f52aa08 AP |
1585 | fc->fs_type = &gfs2_fs_type; |
1586 | fc->sget_key = path.dentry->d_sb->s_bdev; | |
1587 | s = sget_fc(fc, test_meta_super, set_meta_super); | |
e24977d4 | 1588 | path_put(&path); |
f6d03139 | 1589 | if (IS_ERR(s)) { |
d77d1b58 | 1590 | pr_warn("gfs2 mount does not exist\n"); |
1f52aa08 | 1591 | return PTR_ERR(s); |
86384605 | 1592 | } |
1f52aa08 | 1593 | if ((fc->sb_flags ^ s->s_flags) & SB_RDONLY) { |
f55073ff | 1594 | deactivate_locked_super(s); |
1f52aa08 | 1595 | return -EBUSY; |
f55073ff | 1596 | } |
f6d03139 | 1597 | sdp = s->s_fs_info; |
1f52aa08 AP |
1598 | fc->root = dget(sdp->sd_master_dir); |
1599 | return 0; | |
1600 | } | |
1601 | ||
1602 | static const struct fs_context_operations gfs2_meta_context_ops = { | |
1603 | .get_tree = gfs2_meta_get_tree, | |
1604 | }; | |
1605 | ||
1606 | static int gfs2_meta_init_fs_context(struct fs_context *fc) | |
1607 | { | |
1608 | int ret = gfs2_init_fs_context(fc); | |
1609 | ||
1610 | if (ret) | |
1611 | return ret; | |
1612 | ||
1613 | fc->ops = &gfs2_meta_context_ops; | |
1614 | return 0; | |
b3b94faa DT |
1615 | } |
1616 | ||
419c93e0 | 1617 | static void gfs2_kill_sb(struct super_block *sb) |
86384605 AD |
1618 | { |
1619 | struct gfs2_sbd *sdp = sb->s_fs_info; | |
88a19ad0 SW |
1620 | |
1621 | if (sdp == NULL) { | |
1622 | kill_block_super(sb); | |
1623 | return; | |
3af165ac | 1624 | } |
88a19ad0 | 1625 | |
805c0907 | 1626 | gfs2_log_flush(sdp, NULL, GFS2_LOG_HEAD_FLUSH_SYNC | GFS2_LFC_KILL_SB); |
88a19ad0 SW |
1627 | dput(sdp->sd_root_dir); |
1628 | dput(sdp->sd_master_dir); | |
1629 | sdp->sd_root_dir = NULL; | |
1630 | sdp->sd_master_dir = NULL; | |
fefc03bf | 1631 | shrink_dcache_sb(sb); |
0d515210 | 1632 | kill_block_super(sb); |
86384605 AD |
1633 | } |
1634 | ||
b3b94faa DT |
1635 | struct file_system_type gfs2_fs_type = { |
1636 | .name = "gfs2", | |
1637 | .fs_flags = FS_REQUIRES_DEV, | |
1f52aa08 AP |
1638 | .init_fs_context = gfs2_init_fs_context, |
1639 | .parameters = &gfs2_fs_parameters, | |
419c93e0 SW |
1640 | .kill_sb = gfs2_kill_sb, |
1641 | .owner = THIS_MODULE, | |
1642 | }; | |
7f78e035 | 1643 | MODULE_ALIAS_FS("gfs2"); |
419c93e0 SW |
1644 | |
1645 | struct file_system_type gfs2meta_fs_type = { | |
1646 | .name = "gfs2meta", | |
1647 | .fs_flags = FS_REQUIRES_DEV, | |
1f52aa08 | 1648 | .init_fs_context = gfs2_meta_init_fs_context, |
b3b94faa DT |
1649 | .owner = THIS_MODULE, |
1650 | }; | |
7f78e035 | 1651 | MODULE_ALIAS_FS("gfs2meta"); |