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Commit | Line | Data |
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b3b94faa DT |
1 | /* |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
da6dd40d | 3 | * Copyright (C) 2004-2007 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> | |
71b86f56 | 15 | #include <linux/crc32.h> |
5c676f6d | 16 | #include <linux/gfs2_ondisk.h> |
f45b7ddd | 17 | #include <linux/bio.h> |
7d308590 | 18 | #include <linux/lm_interface.h> |
b3b94faa DT |
19 | |
20 | #include "gfs2.h" | |
5c676f6d | 21 | #include "incore.h" |
b3b94faa DT |
22 | #include "bmap.h" |
23 | #include "dir.h" | |
b3b94faa DT |
24 | #include "glock.h" |
25 | #include "glops.h" | |
26 | #include "inode.h" | |
27 | #include "log.h" | |
28 | #include "meta_io.h" | |
29 | #include "quota.h" | |
30 | #include "recovery.h" | |
31 | #include "rgrp.h" | |
32 | #include "super.h" | |
33 | #include "trans.h" | |
5c676f6d | 34 | #include "util.h" |
b3b94faa | 35 | |
cd915493 | 36 | static const u32 gfs2_old_fs_formats[] = { |
75d3b817 SW |
37 | 0 |
38 | }; | |
39 | ||
cd915493 | 40 | static const u32 gfs2_old_multihost_formats[] = { |
75d3b817 SW |
41 | 0 |
42 | }; | |
43 | ||
b3b94faa DT |
44 | /** |
45 | * gfs2_tune_init - Fill a gfs2_tune structure with default values | |
46 | * @gt: tune | |
47 | * | |
48 | */ | |
49 | ||
50 | void gfs2_tune_init(struct gfs2_tune *gt) | |
51 | { | |
52 | spin_lock_init(>->gt_spin); | |
53 | ||
b3b94faa DT |
54 | gt->gt_demote_secs = 300; |
55 | gt->gt_incore_log_blocks = 1024; | |
56 | gt->gt_log_flush_secs = 60; | |
b3b94faa DT |
57 | gt->gt_recoverd_secs = 60; |
58 | gt->gt_logd_secs = 1; | |
59 | gt->gt_quotad_secs = 5; | |
b3b94faa DT |
60 | gt->gt_quota_simul_sync = 64; |
61 | gt->gt_quota_warn_period = 10; | |
62 | gt->gt_quota_scale_num = 1; | |
63 | gt->gt_quota_scale_den = 1; | |
64 | gt->gt_quota_cache_secs = 300; | |
65 | gt->gt_quota_quantum = 60; | |
66 | gt->gt_atime_quantum = 3600; | |
67 | gt->gt_new_files_jdata = 0; | |
b3b94faa | 68 | gt->gt_max_readahead = 1 << 18; |
b3b94faa DT |
69 | gt->gt_stall_secs = 600; |
70 | gt->gt_complain_secs = 10; | |
b3b94faa DT |
71 | gt->gt_statfs_quantum = 30; |
72 | gt->gt_statfs_slow = 0; | |
73 | } | |
74 | ||
75 | /** | |
76 | * gfs2_check_sb - Check superblock | |
77 | * @sdp: the filesystem | |
78 | * @sb: The superblock | |
79 | * @silent: Don't print a message if the check fails | |
80 | * | |
81 | * Checks the version code of the FS is one that we understand how to | |
82 | * read and that the sizes of the various on-disk structures have not | |
83 | * changed. | |
84 | */ | |
85 | ||
f50dfaf7 | 86 | int gfs2_check_sb(struct gfs2_sbd *sdp, struct gfs2_sb_host *sb, int silent) |
b3b94faa DT |
87 | { |
88 | unsigned int x; | |
89 | ||
bb8d8a6f SW |
90 | if (sb->sb_magic != GFS2_MAGIC || |
91 | sb->sb_type != GFS2_METATYPE_SB) { | |
b3b94faa | 92 | if (!silent) |
d92a8d48 | 93 | printk(KERN_WARNING "GFS2: not a GFS2 filesystem\n"); |
b3b94faa DT |
94 | return -EINVAL; |
95 | } | |
96 | ||
97 | /* If format numbers match exactly, we're done. */ | |
98 | ||
99 | if (sb->sb_fs_format == GFS2_FORMAT_FS && | |
100 | sb->sb_multihost_format == GFS2_FORMAT_MULTI) | |
101 | return 0; | |
102 | ||
103 | if (sb->sb_fs_format != GFS2_FORMAT_FS) { | |
104 | for (x = 0; gfs2_old_fs_formats[x]; x++) | |
105 | if (gfs2_old_fs_formats[x] == sb->sb_fs_format) | |
106 | break; | |
107 | ||
108 | if (!gfs2_old_fs_formats[x]) { | |
568f4c96 SW |
109 | printk(KERN_WARNING |
110 | "GFS2: code version (%u, %u) is incompatible " | |
b3b94faa DT |
111 | "with ondisk format (%u, %u)\n", |
112 | GFS2_FORMAT_FS, GFS2_FORMAT_MULTI, | |
113 | sb->sb_fs_format, sb->sb_multihost_format); | |
568f4c96 SW |
114 | printk(KERN_WARNING |
115 | "GFS2: I don't know how to upgrade this FS\n"); | |
b3b94faa DT |
116 | return -EINVAL; |
117 | } | |
118 | } | |
119 | ||
120 | if (sb->sb_multihost_format != GFS2_FORMAT_MULTI) { | |
121 | for (x = 0; gfs2_old_multihost_formats[x]; x++) | |
568f4c96 SW |
122 | if (gfs2_old_multihost_formats[x] == |
123 | sb->sb_multihost_format) | |
b3b94faa DT |
124 | break; |
125 | ||
126 | if (!gfs2_old_multihost_formats[x]) { | |
568f4c96 SW |
127 | printk(KERN_WARNING |
128 | "GFS2: code version (%u, %u) is incompatible " | |
b3b94faa DT |
129 | "with ondisk format (%u, %u)\n", |
130 | GFS2_FORMAT_FS, GFS2_FORMAT_MULTI, | |
131 | sb->sb_fs_format, sb->sb_multihost_format); | |
568f4c96 SW |
132 | printk(KERN_WARNING |
133 | "GFS2: I don't know how to upgrade this FS\n"); | |
b3b94faa DT |
134 | return -EINVAL; |
135 | } | |
136 | } | |
137 | ||
138 | if (!sdp->sd_args.ar_upgrade) { | |
568f4c96 SW |
139 | printk(KERN_WARNING |
140 | "GFS2: code version (%u, %u) is incompatible " | |
b3b94faa DT |
141 | "with ondisk format (%u, %u)\n", |
142 | GFS2_FORMAT_FS, GFS2_FORMAT_MULTI, | |
143 | sb->sb_fs_format, sb->sb_multihost_format); | |
568f4c96 SW |
144 | printk(KERN_INFO |
145 | "GFS2: Use the \"upgrade\" mount option to upgrade " | |
b3b94faa | 146 | "the FS\n"); |
d92a8d48 | 147 | printk(KERN_INFO "GFS2: See the manual for more details\n"); |
b3b94faa DT |
148 | return -EINVAL; |
149 | } | |
150 | ||
151 | return 0; | |
152 | } | |
153 | ||
f45b7ddd | 154 | |
6712ecf8 | 155 | static void end_bio_io_page(struct bio *bio, int error) |
f45b7ddd SW |
156 | { |
157 | struct page *page = bio->bi_private; | |
f45b7ddd SW |
158 | |
159 | if (!error) | |
160 | SetPageUptodate(page); | |
2b98a54f SW |
161 | else |
162 | printk(KERN_WARNING "gfs2: error %d reading superblock\n", error); | |
f45b7ddd | 163 | unlock_page(page); |
f45b7ddd SW |
164 | } |
165 | ||
bb8d8a6f SW |
166 | static void gfs2_sb_in(struct gfs2_sb_host *sb, const void *buf) |
167 | { | |
168 | const struct gfs2_sb *str = buf; | |
169 | ||
170 | sb->sb_magic = be32_to_cpu(str->sb_header.mh_magic); | |
171 | sb->sb_type = be32_to_cpu(str->sb_header.mh_type); | |
172 | sb->sb_format = be32_to_cpu(str->sb_header.mh_format); | |
173 | sb->sb_fs_format = be32_to_cpu(str->sb_fs_format); | |
174 | sb->sb_multihost_format = be32_to_cpu(str->sb_multihost_format); | |
175 | sb->sb_bsize = be32_to_cpu(str->sb_bsize); | |
176 | sb->sb_bsize_shift = be32_to_cpu(str->sb_bsize_shift); | |
177 | sb->sb_master_dir.no_addr = be64_to_cpu(str->sb_master_dir.no_addr); | |
178 | sb->sb_master_dir.no_formal_ino = be64_to_cpu(str->sb_master_dir.no_formal_ino); | |
179 | sb->sb_root_dir.no_addr = be64_to_cpu(str->sb_root_dir.no_addr); | |
180 | sb->sb_root_dir.no_formal_ino = be64_to_cpu(str->sb_root_dir.no_formal_ino); | |
181 | ||
182 | memcpy(sb->sb_lockproto, str->sb_lockproto, GFS2_LOCKNAME_LEN); | |
183 | memcpy(sb->sb_locktable, str->sb_locktable, GFS2_LOCKNAME_LEN); | |
184 | } | |
185 | ||
aac1a3c7 SW |
186 | /** |
187 | * gfs2_read_super - Read the gfs2 super block from disk | |
bb8d8a6f | 188 | * @sdp: The GFS2 super block |
aac1a3c7 | 189 | * @sector: The location of the super block |
bb8d8a6f | 190 | * @error: The error code to return |
aac1a3c7 SW |
191 | * |
192 | * This uses the bio functions to read the super block from disk | |
193 | * because we want to be 100% sure that we never read cached data. | |
194 | * A super block is read twice only during each GFS2 mount and is | |
195 | * never written to by the filesystem. The first time its read no | |
196 | * locks are held, and the only details which are looked at are those | |
197 | * relating to the locking protocol. Once locking is up and working, | |
198 | * the sb is read again under the lock to establish the location of | |
199 | * the master directory (contains pointers to journals etc) and the | |
200 | * root directory. | |
201 | * | |
bb8d8a6f | 202 | * Returns: 0 on success or error |
aac1a3c7 SW |
203 | */ |
204 | ||
bb8d8a6f | 205 | int gfs2_read_super(struct gfs2_sbd *sdp, sector_t sector) |
f45b7ddd | 206 | { |
bb8d8a6f SW |
207 | struct super_block *sb = sdp->sd_vfs; |
208 | struct gfs2_sb *p; | |
f45b7ddd SW |
209 | struct page *page; |
210 | struct bio *bio; | |
211 | ||
16c5f06f | 212 | page = alloc_page(GFP_NOFS); |
f45b7ddd | 213 | if (unlikely(!page)) |
bb8d8a6f | 214 | return -ENOBUFS; |
f45b7ddd SW |
215 | |
216 | ClearPageUptodate(page); | |
217 | ClearPageDirty(page); | |
218 | lock_page(page); | |
219 | ||
16c5f06f | 220 | bio = bio_alloc(GFP_NOFS, 1); |
f45b7ddd SW |
221 | if (unlikely(!bio)) { |
222 | __free_page(page); | |
bb8d8a6f | 223 | return -ENOBUFS; |
f45b7ddd SW |
224 | } |
225 | ||
0da3585e | 226 | bio->bi_sector = sector * (sb->s_blocksize >> 9); |
f45b7ddd SW |
227 | bio->bi_bdev = sb->s_bdev; |
228 | bio_add_page(bio, page, PAGE_SIZE, 0); | |
229 | ||
230 | bio->bi_end_io = end_bio_io_page; | |
231 | bio->bi_private = page; | |
3cf1e7be | 232 | submit_bio(READ_SYNC | (1 << BIO_RW_META), bio); |
f45b7ddd SW |
233 | wait_on_page_locked(page); |
234 | bio_put(bio); | |
235 | if (!PageUptodate(page)) { | |
236 | __free_page(page); | |
bb8d8a6f | 237 | return -EIO; |
f45b7ddd | 238 | } |
bb8d8a6f SW |
239 | p = kmap(page); |
240 | gfs2_sb_in(&sdp->sd_sb, p); | |
241 | kunmap(page); | |
242 | __free_page(page); | |
243 | return 0; | |
f45b7ddd SW |
244 | } |
245 | ||
b3b94faa DT |
246 | /** |
247 | * gfs2_read_sb - Read super block | |
248 | * @sdp: The GFS2 superblock | |
249 | * @gl: the glock for the superblock (assumed to be held) | |
250 | * @silent: Don't print message if mount fails | |
251 | * | |
252 | */ | |
253 | ||
254 | int gfs2_read_sb(struct gfs2_sbd *sdp, struct gfs2_glock *gl, int silent) | |
255 | { | |
cd915493 SW |
256 | u32 hash_blocks, ind_blocks, leaf_blocks; |
257 | u32 tmp_blocks; | |
b3b94faa DT |
258 | unsigned int x; |
259 | int error; | |
260 | ||
bb8d8a6f SW |
261 | error = gfs2_read_super(sdp, GFS2_SB_ADDR >> sdp->sd_fsb2bb_shift); |
262 | if (error) { | |
b3b94faa DT |
263 | if (!silent) |
264 | fs_err(sdp, "can't read superblock\n"); | |
bb8d8a6f | 265 | return error; |
b3b94faa | 266 | } |
b3b94faa DT |
267 | |
268 | error = gfs2_check_sb(sdp, &sdp->sd_sb, silent); | |
269 | if (error) | |
270 | return error; | |
271 | ||
272 | sdp->sd_fsb2bb_shift = sdp->sd_sb.sb_bsize_shift - | |
273 | GFS2_BASIC_BLOCK_SHIFT; | |
274 | sdp->sd_fsb2bb = 1 << sdp->sd_fsb2bb_shift; | |
275 | sdp->sd_diptrs = (sdp->sd_sb.sb_bsize - | |
cd915493 | 276 | sizeof(struct gfs2_dinode)) / sizeof(u64); |
b3b94faa | 277 | sdp->sd_inptrs = (sdp->sd_sb.sb_bsize - |
cd915493 | 278 | sizeof(struct gfs2_meta_header)) / sizeof(u64); |
b3b94faa DT |
279 | sdp->sd_jbsize = sdp->sd_sb.sb_bsize - sizeof(struct gfs2_meta_header); |
280 | sdp->sd_hash_bsize = sdp->sd_sb.sb_bsize / 2; | |
281 | sdp->sd_hash_bsize_shift = sdp->sd_sb.sb_bsize_shift - 1; | |
cd915493 | 282 | sdp->sd_hash_ptrs = sdp->sd_hash_bsize / sizeof(u64); |
b3b94faa DT |
283 | sdp->sd_qc_per_block = (sdp->sd_sb.sb_bsize - |
284 | sizeof(struct gfs2_meta_header)) / | |
f45b7ddd | 285 | sizeof(struct gfs2_quota_change); |
b3b94faa DT |
286 | |
287 | /* Compute maximum reservation required to add a entry to a directory */ | |
288 | ||
cd915493 | 289 | hash_blocks = DIV_ROUND_UP(sizeof(u64) * (1 << GFS2_DIR_MAX_DEPTH), |
b3b94faa DT |
290 | sdp->sd_jbsize); |
291 | ||
292 | ind_blocks = 0; | |
293 | for (tmp_blocks = hash_blocks; tmp_blocks > sdp->sd_diptrs;) { | |
5c676f6d | 294 | tmp_blocks = DIV_ROUND_UP(tmp_blocks, sdp->sd_inptrs); |
b3b94faa DT |
295 | ind_blocks += tmp_blocks; |
296 | } | |
297 | ||
298 | leaf_blocks = 2 + GFS2_DIR_MAX_DEPTH; | |
299 | ||
300 | sdp->sd_max_dirres = hash_blocks + ind_blocks + leaf_blocks; | |
301 | ||
302 | sdp->sd_heightsize[0] = sdp->sd_sb.sb_bsize - | |
303 | sizeof(struct gfs2_dinode); | |
304 | sdp->sd_heightsize[1] = sdp->sd_sb.sb_bsize * sdp->sd_diptrs; | |
305 | for (x = 2;; x++) { | |
cd915493 SW |
306 | u64 space, d; |
307 | u32 m; | |
b3b94faa DT |
308 | |
309 | space = sdp->sd_heightsize[x - 1] * sdp->sd_inptrs; | |
310 | d = space; | |
311 | m = do_div(d, sdp->sd_inptrs); | |
312 | ||
313 | if (d != sdp->sd_heightsize[x - 1] || m) | |
314 | break; | |
315 | sdp->sd_heightsize[x] = space; | |
316 | } | |
317 | sdp->sd_max_height = x; | |
ecc30c79 | 318 | sdp->sd_heightsize[x] = ~0; |
b3b94faa DT |
319 | gfs2_assert(sdp, sdp->sd_max_height <= GFS2_MAX_META_HEIGHT); |
320 | ||
321 | sdp->sd_jheightsize[0] = sdp->sd_sb.sb_bsize - | |
322 | sizeof(struct gfs2_dinode); | |
323 | sdp->sd_jheightsize[1] = sdp->sd_jbsize * sdp->sd_diptrs; | |
324 | for (x = 2;; x++) { | |
cd915493 SW |
325 | u64 space, d; |
326 | u32 m; | |
b3b94faa DT |
327 | |
328 | space = sdp->sd_jheightsize[x - 1] * sdp->sd_inptrs; | |
329 | d = space; | |
330 | m = do_div(d, sdp->sd_inptrs); | |
331 | ||
332 | if (d != sdp->sd_jheightsize[x - 1] || m) | |
333 | break; | |
334 | sdp->sd_jheightsize[x] = space; | |
335 | } | |
336 | sdp->sd_max_jheight = x; | |
ecc30c79 | 337 | sdp->sd_jheightsize[x] = ~0; |
b3b94faa DT |
338 | gfs2_assert(sdp, sdp->sd_max_jheight <= GFS2_MAX_META_HEIGHT); |
339 | ||
340 | return 0; | |
341 | } | |
342 | ||
b3b94faa DT |
343 | /** |
344 | * gfs2_jindex_hold - Grab a lock on the jindex | |
345 | * @sdp: The GFS2 superblock | |
346 | * @ji_gh: the holder for the jindex glock | |
347 | * | |
348 | * This is very similar to the gfs2_rindex_hold() function, except that | |
349 | * in general we hold the jindex lock for longer periods of time and | |
350 | * we grab it far less frequently (in general) then the rgrp lock. | |
351 | * | |
352 | * Returns: errno | |
353 | */ | |
354 | ||
355 | int gfs2_jindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ji_gh) | |
356 | { | |
feaa7bba | 357 | struct gfs2_inode *dip = GFS2_I(sdp->sd_jindex); |
b3b94faa DT |
358 | struct qstr name; |
359 | char buf[20]; | |
360 | struct gfs2_jdesc *jd; | |
361 | int error; | |
362 | ||
363 | name.name = buf; | |
364 | ||
f55ab26a | 365 | mutex_lock(&sdp->sd_jindex_mutex); |
b3b94faa DT |
366 | |
367 | for (;;) { | |
1c0f4872 | 368 | error = gfs2_glock_nq_init(dip->i_gl, LM_ST_SHARED, 0, ji_gh); |
b3b94faa DT |
369 | if (error) |
370 | break; | |
371 | ||
372 | name.len = sprintf(buf, "journal%u", sdp->sd_journals); | |
c752666c | 373 | name.hash = gfs2_disk_hash(name.name, name.len); |
b3b94faa | 374 | |
dbb7cae2 | 375 | error = gfs2_dir_check(sdp->sd_jindex, &name, NULL); |
b3b94faa DT |
376 | if (error == -ENOENT) { |
377 | error = 0; | |
378 | break; | |
379 | } | |
380 | ||
381 | gfs2_glock_dq_uninit(ji_gh); | |
382 | ||
383 | if (error) | |
384 | break; | |
385 | ||
386 | error = -ENOMEM; | |
387 | jd = kzalloc(sizeof(struct gfs2_jdesc), GFP_KERNEL); | |
388 | if (!jd) | |
389 | break; | |
390 | ||
0811a127 | 391 | INIT_LIST_HEAD(&jd->extent_list); |
c752666c SW |
392 | jd->jd_inode = gfs2_lookupi(sdp->sd_jindex, &name, 1, NULL); |
393 | if (!jd->jd_inode || IS_ERR(jd->jd_inode)) { | |
394 | if (!jd->jd_inode) | |
395 | error = -ENOENT; | |
396 | else | |
397 | error = PTR_ERR(jd->jd_inode); | |
b3b94faa DT |
398 | kfree(jd); |
399 | break; | |
400 | } | |
401 | ||
402 | spin_lock(&sdp->sd_jindex_spin); | |
403 | jd->jd_jid = sdp->sd_journals++; | |
404 | list_add_tail(&jd->jd_list, &sdp->sd_jindex_list); | |
405 | spin_unlock(&sdp->sd_jindex_spin); | |
406 | } | |
407 | ||
f55ab26a | 408 | mutex_unlock(&sdp->sd_jindex_mutex); |
b3b94faa DT |
409 | |
410 | return error; | |
411 | } | |
412 | ||
413 | /** | |
414 | * gfs2_jindex_free - Clear all the journal index information | |
415 | * @sdp: The GFS2 superblock | |
416 | * | |
417 | */ | |
418 | ||
419 | void gfs2_jindex_free(struct gfs2_sbd *sdp) | |
420 | { | |
da6dd40d | 421 | struct list_head list, *head; |
b3b94faa | 422 | struct gfs2_jdesc *jd; |
da6dd40d | 423 | struct gfs2_journal_extent *jext; |
b3b94faa DT |
424 | |
425 | spin_lock(&sdp->sd_jindex_spin); | |
426 | list_add(&list, &sdp->sd_jindex_list); | |
427 | list_del_init(&sdp->sd_jindex_list); | |
428 | sdp->sd_journals = 0; | |
429 | spin_unlock(&sdp->sd_jindex_spin); | |
430 | ||
431 | while (!list_empty(&list)) { | |
432 | jd = list_entry(list.next, struct gfs2_jdesc, jd_list); | |
da6dd40d BP |
433 | head = &jd->extent_list; |
434 | while (!list_empty(head)) { | |
435 | jext = list_entry(head->next, | |
436 | struct gfs2_journal_extent, | |
437 | extent_list); | |
438 | list_del(&jext->extent_list); | |
439 | kfree(jext); | |
440 | } | |
b3b94faa | 441 | list_del(&jd->jd_list); |
7359a19c | 442 | iput(jd->jd_inode); |
b3b94faa DT |
443 | kfree(jd); |
444 | } | |
445 | } | |
446 | ||
447 | static struct gfs2_jdesc *jdesc_find_i(struct list_head *head, unsigned int jid) | |
448 | { | |
449 | struct gfs2_jdesc *jd; | |
450 | int found = 0; | |
451 | ||
452 | list_for_each_entry(jd, head, jd_list) { | |
453 | if (jd->jd_jid == jid) { | |
454 | found = 1; | |
455 | break; | |
456 | } | |
457 | } | |
458 | ||
459 | if (!found) | |
460 | jd = NULL; | |
461 | ||
462 | return jd; | |
463 | } | |
464 | ||
465 | struct gfs2_jdesc *gfs2_jdesc_find(struct gfs2_sbd *sdp, unsigned int jid) | |
466 | { | |
467 | struct gfs2_jdesc *jd; | |
468 | ||
469 | spin_lock(&sdp->sd_jindex_spin); | |
470 | jd = jdesc_find_i(&sdp->sd_jindex_list, jid); | |
471 | spin_unlock(&sdp->sd_jindex_spin); | |
472 | ||
473 | return jd; | |
474 | } | |
475 | ||
476 | void gfs2_jdesc_make_dirty(struct gfs2_sbd *sdp, unsigned int jid) | |
477 | { | |
478 | struct gfs2_jdesc *jd; | |
479 | ||
480 | spin_lock(&sdp->sd_jindex_spin); | |
481 | jd = jdesc_find_i(&sdp->sd_jindex_list, jid); | |
482 | if (jd) | |
483 | jd->jd_dirty = 1; | |
484 | spin_unlock(&sdp->sd_jindex_spin); | |
485 | } | |
486 | ||
487 | struct gfs2_jdesc *gfs2_jdesc_find_dirty(struct gfs2_sbd *sdp) | |
488 | { | |
489 | struct gfs2_jdesc *jd; | |
490 | int found = 0; | |
491 | ||
492 | spin_lock(&sdp->sd_jindex_spin); | |
493 | ||
494 | list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { | |
495 | if (jd->jd_dirty) { | |
496 | jd->jd_dirty = 0; | |
497 | found = 1; | |
498 | break; | |
499 | } | |
500 | } | |
501 | spin_unlock(&sdp->sd_jindex_spin); | |
502 | ||
503 | if (!found) | |
504 | jd = NULL; | |
505 | ||
506 | return jd; | |
507 | } | |
508 | ||
509 | int gfs2_jdesc_check(struct gfs2_jdesc *jd) | |
510 | { | |
feaa7bba SW |
511 | struct gfs2_inode *ip = GFS2_I(jd->jd_inode); |
512 | struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode); | |
b3b94faa DT |
513 | int ar; |
514 | int error; | |
515 | ||
feaa7bba | 516 | if (ip->i_di.di_size < (8 << 20) || ip->i_di.di_size > (1 << 30) || |
b3b94faa DT |
517 | (ip->i_di.di_size & (sdp->sd_sb.sb_bsize - 1))) { |
518 | gfs2_consist_inode(ip); | |
519 | return -EIO; | |
520 | } | |
521 | jd->jd_blocks = ip->i_di.di_size >> sdp->sd_sb.sb_bsize_shift; | |
522 | ||
feaa7bba | 523 | error = gfs2_write_alloc_required(ip, 0, ip->i_di.di_size, &ar); |
b3b94faa DT |
524 | if (!error && ar) { |
525 | gfs2_consist_inode(ip); | |
526 | error = -EIO; | |
527 | } | |
528 | ||
529 | return error; | |
530 | } | |
531 | ||
b3b94faa DT |
532 | /** |
533 | * gfs2_make_fs_rw - Turn a Read-Only FS into a Read-Write one | |
534 | * @sdp: the filesystem | |
535 | * | |
536 | * Returns: errno | |
537 | */ | |
538 | ||
539 | int gfs2_make_fs_rw(struct gfs2_sbd *sdp) | |
540 | { | |
feaa7bba | 541 | struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode); |
5c676f6d | 542 | struct gfs2_glock *j_gl = ip->i_gl; |
b3b94faa | 543 | struct gfs2_holder t_gh; |
55167622 | 544 | struct gfs2_log_header_host head; |
b3b94faa DT |
545 | int error; |
546 | ||
1c0f4872 | 547 | error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED, 0, &t_gh); |
b3b94faa DT |
548 | if (error) |
549 | return error; | |
550 | ||
1a14d3a6 | 551 | j_gl->gl_ops->go_inval(j_gl, DIO_METADATA); |
b3b94faa DT |
552 | |
553 | error = gfs2_find_jhead(sdp->sd_jdesc, &head); | |
554 | if (error) | |
555 | goto fail; | |
556 | ||
557 | if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) { | |
558 | gfs2_consist(sdp); | |
559 | error = -EIO; | |
560 | goto fail; | |
561 | } | |
562 | ||
563 | /* Initialize some head of the log stuff */ | |
564 | sdp->sd_log_sequence = head.lh_sequence + 1; | |
565 | gfs2_log_pointers_init(sdp, head.lh_blkno); | |
566 | ||
b3b94faa DT |
567 | error = gfs2_quota_init(sdp); |
568 | if (error) | |
a91ea69f | 569 | goto fail; |
b3b94faa DT |
570 | |
571 | set_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags); | |
572 | ||
573 | gfs2_glock_dq_uninit(&t_gh); | |
574 | ||
575 | return 0; | |
576 | ||
a91ea69f | 577 | fail: |
b3b94faa DT |
578 | t_gh.gh_flags |= GL_NOCACHE; |
579 | gfs2_glock_dq_uninit(&t_gh); | |
580 | ||
581 | return error; | |
582 | } | |
583 | ||
584 | /** | |
585 | * gfs2_make_fs_ro - Turn a Read-Write FS into a Read-Only one | |
586 | * @sdp: the filesystem | |
587 | * | |
588 | * Returns: errno | |
589 | */ | |
590 | ||
591 | int gfs2_make_fs_ro(struct gfs2_sbd *sdp) | |
592 | { | |
593 | struct gfs2_holder t_gh; | |
594 | int error; | |
595 | ||
b3b94faa DT |
596 | gfs2_quota_sync(sdp); |
597 | gfs2_statfs_sync(sdp); | |
598 | ||
1c0f4872 SW |
599 | error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_SHARED, GL_NOCACHE, |
600 | &t_gh); | |
b3b94faa DT |
601 | if (error && !test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) |
602 | return error; | |
603 | ||
604 | gfs2_meta_syncfs(sdp); | |
605 | gfs2_log_shutdown(sdp); | |
606 | ||
607 | clear_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags); | |
608 | ||
609 | if (t_gh.gh_gl) | |
610 | gfs2_glock_dq_uninit(&t_gh); | |
611 | ||
b3b94faa DT |
612 | gfs2_quota_cleanup(sdp); |
613 | ||
614 | return error; | |
615 | } | |
616 | ||
bb8d8a6f SW |
617 | static void gfs2_statfs_change_in(struct gfs2_statfs_change_host *sc, const void *buf) |
618 | { | |
619 | const struct gfs2_statfs_change *str = buf; | |
620 | ||
621 | sc->sc_total = be64_to_cpu(str->sc_total); | |
622 | sc->sc_free = be64_to_cpu(str->sc_free); | |
623 | sc->sc_dinodes = be64_to_cpu(str->sc_dinodes); | |
624 | } | |
625 | ||
626 | static void gfs2_statfs_change_out(const struct gfs2_statfs_change_host *sc, void *buf) | |
627 | { | |
628 | struct gfs2_statfs_change *str = buf; | |
629 | ||
630 | str->sc_total = cpu_to_be64(sc->sc_total); | |
631 | str->sc_free = cpu_to_be64(sc->sc_free); | |
632 | str->sc_dinodes = cpu_to_be64(sc->sc_dinodes); | |
633 | } | |
634 | ||
b3b94faa DT |
635 | int gfs2_statfs_init(struct gfs2_sbd *sdp) |
636 | { | |
feaa7bba | 637 | struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); |
bd209cc0 | 638 | struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; |
feaa7bba | 639 | struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); |
bd209cc0 | 640 | struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; |
b3b94faa DT |
641 | struct buffer_head *m_bh, *l_bh; |
642 | struct gfs2_holder gh; | |
643 | int error; | |
644 | ||
645 | error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE, | |
646 | &gh); | |
647 | if (error) | |
648 | return error; | |
649 | ||
650 | error = gfs2_meta_inode_buffer(m_ip, &m_bh); | |
651 | if (error) | |
652 | goto out; | |
653 | ||
654 | if (sdp->sd_args.ar_spectator) { | |
655 | spin_lock(&sdp->sd_statfs_spin); | |
656 | gfs2_statfs_change_in(m_sc, m_bh->b_data + | |
657 | sizeof(struct gfs2_dinode)); | |
658 | spin_unlock(&sdp->sd_statfs_spin); | |
659 | } else { | |
660 | error = gfs2_meta_inode_buffer(l_ip, &l_bh); | |
661 | if (error) | |
662 | goto out_m_bh; | |
663 | ||
664 | spin_lock(&sdp->sd_statfs_spin); | |
665 | gfs2_statfs_change_in(m_sc, m_bh->b_data + | |
666 | sizeof(struct gfs2_dinode)); | |
667 | gfs2_statfs_change_in(l_sc, l_bh->b_data + | |
668 | sizeof(struct gfs2_dinode)); | |
669 | spin_unlock(&sdp->sd_statfs_spin); | |
670 | ||
671 | brelse(l_bh); | |
672 | } | |
673 | ||
a91ea69f | 674 | out_m_bh: |
b3b94faa | 675 | brelse(m_bh); |
a91ea69f | 676 | out: |
b3b94faa | 677 | gfs2_glock_dq_uninit(&gh); |
b3b94faa DT |
678 | return 0; |
679 | } | |
680 | ||
cd915493 SW |
681 | void gfs2_statfs_change(struct gfs2_sbd *sdp, s64 total, s64 free, |
682 | s64 dinodes) | |
b3b94faa | 683 | { |
feaa7bba | 684 | struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); |
bd209cc0 | 685 | struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; |
b3b94faa DT |
686 | struct buffer_head *l_bh; |
687 | int error; | |
688 | ||
689 | error = gfs2_meta_inode_buffer(l_ip, &l_bh); | |
690 | if (error) | |
691 | return; | |
692 | ||
d4e9c4c3 | 693 | gfs2_trans_add_bh(l_ip->i_gl, l_bh, 1); |
b3b94faa DT |
694 | |
695 | spin_lock(&sdp->sd_statfs_spin); | |
696 | l_sc->sc_total += total; | |
697 | l_sc->sc_free += free; | |
698 | l_sc->sc_dinodes += dinodes; | |
907b9bce | 699 | gfs2_statfs_change_out(l_sc, l_bh->b_data + sizeof(struct gfs2_dinode)); |
b3b94faa DT |
700 | spin_unlock(&sdp->sd_statfs_spin); |
701 | ||
702 | brelse(l_bh); | |
703 | } | |
704 | ||
705 | int gfs2_statfs_sync(struct gfs2_sbd *sdp) | |
706 | { | |
feaa7bba SW |
707 | struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode); |
708 | struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode); | |
bd209cc0 AV |
709 | struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; |
710 | struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; | |
b3b94faa DT |
711 | struct gfs2_holder gh; |
712 | struct buffer_head *m_bh, *l_bh; | |
713 | int error; | |
714 | ||
715 | error = gfs2_glock_nq_init(m_ip->i_gl, LM_ST_EXCLUSIVE, GL_NOCACHE, | |
716 | &gh); | |
717 | if (error) | |
718 | return error; | |
719 | ||
720 | error = gfs2_meta_inode_buffer(m_ip, &m_bh); | |
721 | if (error) | |
722 | goto out; | |
723 | ||
724 | spin_lock(&sdp->sd_statfs_spin); | |
725 | gfs2_statfs_change_in(m_sc, m_bh->b_data + | |
907b9bce | 726 | sizeof(struct gfs2_dinode)); |
b3b94faa DT |
727 | if (!l_sc->sc_total && !l_sc->sc_free && !l_sc->sc_dinodes) { |
728 | spin_unlock(&sdp->sd_statfs_spin); | |
729 | goto out_bh; | |
730 | } | |
731 | spin_unlock(&sdp->sd_statfs_spin); | |
732 | ||
733 | error = gfs2_meta_inode_buffer(l_ip, &l_bh); | |
734 | if (error) | |
735 | goto out_bh; | |
736 | ||
737 | error = gfs2_trans_begin(sdp, 2 * RES_DINODE, 0); | |
738 | if (error) | |
739 | goto out_bh2; | |
740 | ||
d4e9c4c3 | 741 | gfs2_trans_add_bh(l_ip->i_gl, l_bh, 1); |
b3b94faa DT |
742 | |
743 | spin_lock(&sdp->sd_statfs_spin); | |
744 | m_sc->sc_total += l_sc->sc_total; | |
745 | m_sc->sc_free += l_sc->sc_free; | |
746 | m_sc->sc_dinodes += l_sc->sc_dinodes; | |
747 | memset(l_sc, 0, sizeof(struct gfs2_statfs_change)); | |
748 | memset(l_bh->b_data + sizeof(struct gfs2_dinode), | |
749 | 0, sizeof(struct gfs2_statfs_change)); | |
750 | spin_unlock(&sdp->sd_statfs_spin); | |
751 | ||
d4e9c4c3 | 752 | gfs2_trans_add_bh(m_ip->i_gl, m_bh, 1); |
b3b94faa DT |
753 | gfs2_statfs_change_out(m_sc, m_bh->b_data + sizeof(struct gfs2_dinode)); |
754 | ||
755 | gfs2_trans_end(sdp); | |
756 | ||
a91ea69f | 757 | out_bh2: |
b3b94faa | 758 | brelse(l_bh); |
a91ea69f | 759 | out_bh: |
b3b94faa | 760 | brelse(m_bh); |
a91ea69f | 761 | out: |
b3b94faa | 762 | gfs2_glock_dq_uninit(&gh); |
b3b94faa DT |
763 | return error; |
764 | } | |
765 | ||
766 | /** | |
767 | * gfs2_statfs_i - Do a statfs | |
768 | * @sdp: the filesystem | |
769 | * @sg: the sg structure | |
770 | * | |
771 | * Returns: errno | |
772 | */ | |
773 | ||
bd209cc0 | 774 | int gfs2_statfs_i(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc) |
b3b94faa | 775 | { |
bd209cc0 AV |
776 | struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master; |
777 | struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local; | |
b3b94faa DT |
778 | |
779 | spin_lock(&sdp->sd_statfs_spin); | |
780 | ||
781 | *sc = *m_sc; | |
782 | sc->sc_total += l_sc->sc_total; | |
783 | sc->sc_free += l_sc->sc_free; | |
784 | sc->sc_dinodes += l_sc->sc_dinodes; | |
785 | ||
786 | spin_unlock(&sdp->sd_statfs_spin); | |
787 | ||
788 | if (sc->sc_free < 0) | |
789 | sc->sc_free = 0; | |
790 | if (sc->sc_free > sc->sc_total) | |
791 | sc->sc_free = sc->sc_total; | |
792 | if (sc->sc_dinodes < 0) | |
793 | sc->sc_dinodes = 0; | |
794 | ||
795 | return 0; | |
796 | } | |
797 | ||
798 | /** | |
799 | * statfs_fill - fill in the sg for a given RG | |
800 | * @rgd: the RG | |
801 | * @sc: the sc structure | |
802 | * | |
803 | * Returns: 0 on success, -ESTALE if the LVB is invalid | |
804 | */ | |
805 | ||
806 | static int statfs_slow_fill(struct gfs2_rgrpd *rgd, | |
bd209cc0 | 807 | struct gfs2_statfs_change_host *sc) |
b3b94faa DT |
808 | { |
809 | gfs2_rgrp_verify(rgd); | |
bb8d8a6f | 810 | sc->sc_total += rgd->rd_data; |
b3b94faa DT |
811 | sc->sc_free += rgd->rd_rg.rg_free; |
812 | sc->sc_dinodes += rgd->rd_rg.rg_dinodes; | |
813 | return 0; | |
814 | } | |
815 | ||
816 | /** | |
817 | * gfs2_statfs_slow - Stat a filesystem using asynchronous locking | |
818 | * @sdp: the filesystem | |
819 | * @sc: the sc info that will be returned | |
820 | * | |
821 | * Any error (other than a signal) will cause this routine to fall back | |
822 | * to the synchronous version. | |
823 | * | |
824 | * FIXME: This really shouldn't busy wait like this. | |
825 | * | |
826 | * Returns: errno | |
827 | */ | |
828 | ||
bd209cc0 | 829 | int gfs2_statfs_slow(struct gfs2_sbd *sdp, struct gfs2_statfs_change_host *sc) |
b3b94faa DT |
830 | { |
831 | struct gfs2_holder ri_gh; | |
832 | struct gfs2_rgrpd *rgd_next; | |
833 | struct gfs2_holder *gha, *gh; | |
834 | unsigned int slots = 64; | |
835 | unsigned int x; | |
836 | int done; | |
837 | int error = 0, err; | |
838 | ||
bd209cc0 | 839 | memset(sc, 0, sizeof(struct gfs2_statfs_change_host)); |
b3b94faa DT |
840 | gha = kcalloc(slots, sizeof(struct gfs2_holder), GFP_KERNEL); |
841 | if (!gha) | |
842 | return -ENOMEM; | |
843 | ||
844 | error = gfs2_rindex_hold(sdp, &ri_gh); | |
845 | if (error) | |
846 | goto out; | |
847 | ||
848 | rgd_next = gfs2_rgrpd_get_first(sdp); | |
849 | ||
850 | for (;;) { | |
851 | done = 1; | |
852 | ||
853 | for (x = 0; x < slots; x++) { | |
854 | gh = gha + x; | |
855 | ||
856 | if (gh->gh_gl && gfs2_glock_poll(gh)) { | |
857 | err = gfs2_glock_wait(gh); | |
858 | if (err) { | |
859 | gfs2_holder_uninit(gh); | |
860 | error = err; | |
861 | } else { | |
862 | if (!error) | |
5c676f6d SW |
863 | error = statfs_slow_fill( |
864 | gh->gh_gl->gl_object, sc); | |
b3b94faa DT |
865 | gfs2_glock_dq_uninit(gh); |
866 | } | |
867 | } | |
868 | ||
869 | if (gh->gh_gl) | |
870 | done = 0; | |
871 | else if (rgd_next && !error) { | |
872 | error = gfs2_glock_nq_init(rgd_next->rd_gl, | |
873 | LM_ST_SHARED, | |
874 | GL_ASYNC, | |
875 | gh); | |
876 | rgd_next = gfs2_rgrpd_get_next(rgd_next); | |
877 | done = 0; | |
878 | } | |
879 | ||
880 | if (signal_pending(current)) | |
881 | error = -ERESTARTSYS; | |
882 | } | |
883 | ||
884 | if (done) | |
885 | break; | |
886 | ||
887 | yield(); | |
888 | } | |
889 | ||
890 | gfs2_glock_dq_uninit(&ri_gh); | |
891 | ||
a91ea69f | 892 | out: |
b3b94faa | 893 | kfree(gha); |
b3b94faa DT |
894 | return error; |
895 | } | |
896 | ||
897 | struct lfcc { | |
898 | struct list_head list; | |
899 | struct gfs2_holder gh; | |
900 | }; | |
901 | ||
902 | /** | |
903 | * gfs2_lock_fs_check_clean - Stop all writes to the FS and check that all | |
904 | * journals are clean | |
905 | * @sdp: the file system | |
906 | * @state: the state to put the transaction lock into | |
907 | * @t_gh: the hold on the transaction lock | |
908 | * | |
909 | * Returns: errno | |
910 | */ | |
911 | ||
08bc2dbc AB |
912 | static int gfs2_lock_fs_check_clean(struct gfs2_sbd *sdp, |
913 | struct gfs2_holder *t_gh) | |
b3b94faa | 914 | { |
5c676f6d | 915 | struct gfs2_inode *ip; |
b3b94faa DT |
916 | struct gfs2_holder ji_gh; |
917 | struct gfs2_jdesc *jd; | |
918 | struct lfcc *lfcc; | |
919 | LIST_HEAD(list); | |
55167622 | 920 | struct gfs2_log_header_host lh; |
b3b94faa DT |
921 | int error; |
922 | ||
923 | error = gfs2_jindex_hold(sdp, &ji_gh); | |
924 | if (error) | |
925 | return error; | |
926 | ||
927 | list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { | |
928 | lfcc = kmalloc(sizeof(struct lfcc), GFP_KERNEL); | |
929 | if (!lfcc) { | |
930 | error = -ENOMEM; | |
931 | goto out; | |
932 | } | |
feaa7bba SW |
933 | ip = GFS2_I(jd->jd_inode); |
934 | error = gfs2_glock_nq_init(ip->i_gl, LM_ST_SHARED, 0, &lfcc->gh); | |
b3b94faa DT |
935 | if (error) { |
936 | kfree(lfcc); | |
937 | goto out; | |
938 | } | |
939 | list_add(&lfcc->list, &list); | |
940 | } | |
941 | ||
942 | error = gfs2_glock_nq_init(sdp->sd_trans_gl, LM_ST_DEFERRED, | |
6802e340 | 943 | GL_NOCACHE, t_gh); |
b3b94faa DT |
944 | |
945 | list_for_each_entry(jd, &sdp->sd_jindex_list, jd_list) { | |
946 | error = gfs2_jdesc_check(jd); | |
947 | if (error) | |
948 | break; | |
949 | error = gfs2_find_jhead(jd, &lh); | |
950 | if (error) | |
951 | break; | |
952 | if (!(lh.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) { | |
953 | error = -EBUSY; | |
954 | break; | |
955 | } | |
956 | } | |
957 | ||
958 | if (error) | |
959 | gfs2_glock_dq_uninit(t_gh); | |
960 | ||
a91ea69f | 961 | out: |
b3b94faa DT |
962 | while (!list_empty(&list)) { |
963 | lfcc = list_entry(list.next, struct lfcc, list); | |
964 | list_del(&lfcc->list); | |
965 | gfs2_glock_dq_uninit(&lfcc->gh); | |
966 | kfree(lfcc); | |
967 | } | |
968 | gfs2_glock_dq_uninit(&ji_gh); | |
b3b94faa DT |
969 | return error; |
970 | } | |
971 | ||
972 | /** | |
973 | * gfs2_freeze_fs - freezes the file system | |
974 | * @sdp: the file system | |
975 | * | |
976 | * This function flushes data and meta data for all machines by | |
977 | * aquiring the transaction log exclusively. All journals are | |
978 | * ensured to be in a clean state as well. | |
979 | * | |
980 | * Returns: errno | |
981 | */ | |
982 | ||
983 | int gfs2_freeze_fs(struct gfs2_sbd *sdp) | |
984 | { | |
985 | int error = 0; | |
986 | ||
f55ab26a | 987 | mutex_lock(&sdp->sd_freeze_lock); |
b3b94faa DT |
988 | |
989 | if (!sdp->sd_freeze_count++) { | |
990 | error = gfs2_lock_fs_check_clean(sdp, &sdp->sd_freeze_gh); | |
991 | if (error) | |
992 | sdp->sd_freeze_count--; | |
993 | } | |
994 | ||
f55ab26a | 995 | mutex_unlock(&sdp->sd_freeze_lock); |
b3b94faa DT |
996 | |
997 | return error; | |
998 | } | |
999 | ||
1000 | /** | |
1001 | * gfs2_unfreeze_fs - unfreezes the file system | |
1002 | * @sdp: the file system | |
1003 | * | |
1004 | * This function allows the file system to proceed by unlocking | |
1005 | * the exclusively held transaction lock. Other GFS2 nodes are | |
1006 | * now free to acquire the lock shared and go on with their lives. | |
1007 | * | |
1008 | */ | |
1009 | ||
1010 | void gfs2_unfreeze_fs(struct gfs2_sbd *sdp) | |
1011 | { | |
f55ab26a | 1012 | mutex_lock(&sdp->sd_freeze_lock); |
b3b94faa DT |
1013 | |
1014 | if (sdp->sd_freeze_count && !--sdp->sd_freeze_count) | |
1015 | gfs2_glock_dq_uninit(&sdp->sd_freeze_gh); | |
1016 | ||
f55ab26a | 1017 | mutex_unlock(&sdp->sd_freeze_lock); |
b3b94faa DT |
1018 | } |
1019 |