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Commit | Line | Data |
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b3b94faa DT |
1 | /* |
2 | * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. | |
cf45b752 | 3 | * Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved. |
b3b94faa DT |
4 | * |
5 | * This copyrighted material is made available to anyone wishing to use, | |
6 | * modify, copy, or redistribute it subject to the terms and conditions | |
e9fc2aa0 | 7 | * of the GNU General Public License version 2. |
b3b94faa DT |
8 | */ |
9 | ||
b3b94faa DT |
10 | #include <linux/spinlock.h> |
11 | #include <linux/completion.h> | |
12 | #include <linux/buffer_head.h> | |
5c676f6d | 13 | #include <linux/gfs2_ondisk.h> |
6802e340 | 14 | #include <linux/bio.h> |
c65f7fb5 | 15 | #include <linux/posix_acl.h> |
f39814f6 | 16 | #include <linux/security.h> |
b3b94faa DT |
17 | |
18 | #include "gfs2.h" | |
5c676f6d | 19 | #include "incore.h" |
b3b94faa DT |
20 | #include "bmap.h" |
21 | #include "glock.h" | |
22 | #include "glops.h" | |
23 | #include "inode.h" | |
24 | #include "log.h" | |
25 | #include "meta_io.h" | |
b3b94faa DT |
26 | #include "recovery.h" |
27 | #include "rgrp.h" | |
5c676f6d | 28 | #include "util.h" |
ddacfaf7 | 29 | #include "trans.h" |
17d539f0 | 30 | #include "dir.h" |
b3b94faa | 31 | |
2e60d768 BM |
32 | struct workqueue_struct *gfs2_freeze_wq; |
33 | ||
75549186 SW |
34 | static void gfs2_ail_error(struct gfs2_glock *gl, const struct buffer_head *bh) |
35 | { | |
15562c43 BP |
36 | fs_err(gl->gl_name.ln_sbd, |
37 | "AIL buffer %p: blocknr %llu state 0x%08lx mapping %p page " | |
38 | "state 0x%lx\n", | |
75549186 SW |
39 | bh, (unsigned long long)bh->b_blocknr, bh->b_state, |
40 | bh->b_page->mapping, bh->b_page->flags); | |
15562c43 | 41 | fs_err(gl->gl_name.ln_sbd, "AIL glock %u:%llu mapping %p\n", |
75549186 SW |
42 | gl->gl_name.ln_type, gl->gl_name.ln_number, |
43 | gfs2_glock2aspace(gl)); | |
15562c43 | 44 | gfs2_lm_withdraw(gl->gl_name.ln_sbd, "AIL error\n"); |
75549186 SW |
45 | } |
46 | ||
ddacfaf7 | 47 | /** |
dba898b0 | 48 | * __gfs2_ail_flush - remove all buffers for a given lock from the AIL |
ddacfaf7 | 49 | * @gl: the glock |
b5b24d7a | 50 | * @fsync: set when called from fsync (not all buffers will be clean) |
ddacfaf7 SW |
51 | * |
52 | * None of the buffers should be dirty, locked, or pinned. | |
53 | */ | |
54 | ||
1bc333f4 BM |
55 | static void __gfs2_ail_flush(struct gfs2_glock *gl, bool fsync, |
56 | unsigned int nr_revokes) | |
ddacfaf7 | 57 | { |
15562c43 | 58 | struct gfs2_sbd *sdp = gl->gl_name.ln_sbd; |
ddacfaf7 | 59 | struct list_head *head = &gl->gl_ail_list; |
b5b24d7a | 60 | struct gfs2_bufdata *bd, *tmp; |
ddacfaf7 | 61 | struct buffer_head *bh; |
b5b24d7a | 62 | const unsigned long b_state = (1UL << BH_Dirty)|(1UL << BH_Pinned)|(1UL << BH_Lock); |
d8348de0 | 63 | |
b5b24d7a | 64 | gfs2_log_lock(sdp); |
d6a079e8 | 65 | spin_lock(&sdp->sd_ail_lock); |
1bc333f4 BM |
66 | list_for_each_entry_safe_reverse(bd, tmp, head, bd_ail_gl_list) { |
67 | if (nr_revokes == 0) | |
68 | break; | |
ddacfaf7 | 69 | bh = bd->bd_bh; |
b5b24d7a SW |
70 | if (bh->b_state & b_state) { |
71 | if (fsync) | |
72 | continue; | |
75549186 | 73 | gfs2_ail_error(gl, bh); |
b5b24d7a | 74 | } |
1ad38c43 | 75 | gfs2_trans_add_revoke(sdp, bd); |
1bc333f4 | 76 | nr_revokes--; |
ddacfaf7 | 77 | } |
8eae1ca0 | 78 | GLOCK_BUG_ON(gl, !fsync && atomic_read(&gl->gl_ail_count)); |
d6a079e8 | 79 | spin_unlock(&sdp->sd_ail_lock); |
b5b24d7a | 80 | gfs2_log_unlock(sdp); |
dba898b0 SW |
81 | } |
82 | ||
83 | ||
84 | static void gfs2_ail_empty_gl(struct gfs2_glock *gl) | |
85 | { | |
15562c43 | 86 | struct gfs2_sbd *sdp = gl->gl_name.ln_sbd; |
dba898b0 SW |
87 | struct gfs2_trans tr; |
88 | ||
89 | memset(&tr, 0, sizeof(tr)); | |
d69a3c65 SW |
90 | INIT_LIST_HEAD(&tr.tr_buf); |
91 | INIT_LIST_HEAD(&tr.tr_databuf); | |
dba898b0 SW |
92 | tr.tr_revokes = atomic_read(&gl->gl_ail_count); |
93 | ||
94 | if (!tr.tr_revokes) | |
95 | return; | |
96 | ||
24972557 BM |
97 | /* A shortened, inline version of gfs2_trans_begin() |
98 | * tr->alloced is not set since the transaction structure is | |
99 | * on the stack */ | |
dba898b0 | 100 | tr.tr_reserved = 1 + gfs2_struct2blk(sdp, tr.tr_revokes, sizeof(u64)); |
d29c0afe | 101 | tr.tr_ip = _RET_IP_; |
2e60d768 | 102 | if (gfs2_log_reserve(sdp, tr.tr_reserved) < 0) |
24972557 | 103 | return; |
8eae1ca0 | 104 | WARN_ON_ONCE(current->journal_info); |
dba898b0 SW |
105 | current->journal_info = &tr; |
106 | ||
1bc333f4 | 107 | __gfs2_ail_flush(gl, 0, tr.tr_revokes); |
dba898b0 SW |
108 | |
109 | gfs2_trans_end(sdp); | |
24972557 | 110 | gfs2_log_flush(sdp, NULL, NORMAL_FLUSH); |
dba898b0 | 111 | } |
ddacfaf7 | 112 | |
b5b24d7a | 113 | void gfs2_ail_flush(struct gfs2_glock *gl, bool fsync) |
dba898b0 | 114 | { |
15562c43 | 115 | struct gfs2_sbd *sdp = gl->gl_name.ln_sbd; |
dba898b0 | 116 | unsigned int revokes = atomic_read(&gl->gl_ail_count); |
1bc333f4 | 117 | unsigned int max_revokes = (sdp->sd_sb.sb_bsize - sizeof(struct gfs2_log_descriptor)) / sizeof(u64); |
dba898b0 SW |
118 | int ret; |
119 | ||
120 | if (!revokes) | |
121 | return; | |
122 | ||
1bc333f4 BM |
123 | while (revokes > max_revokes) |
124 | max_revokes += (sdp->sd_sb.sb_bsize - sizeof(struct gfs2_meta_header)) / sizeof(u64); | |
125 | ||
126 | ret = gfs2_trans_begin(sdp, 0, max_revokes); | |
dba898b0 SW |
127 | if (ret) |
128 | return; | |
1bc333f4 | 129 | __gfs2_ail_flush(gl, fsync, max_revokes); |
ddacfaf7 | 130 | gfs2_trans_end(sdp); |
24972557 | 131 | gfs2_log_flush(sdp, NULL, NORMAL_FLUSH); |
ddacfaf7 | 132 | } |
ba7f7290 SW |
133 | |
134 | /** | |
6bac243f | 135 | * rgrp_go_sync - sync out the metadata for this glock |
b3b94faa | 136 | * @gl: the glock |
b3b94faa DT |
137 | * |
138 | * Called when demoting or unlocking an EX glock. We must flush | |
139 | * to disk all dirty buffers/pages relating to this glock, and must not | |
140 | * not return to caller to demote/unlock the glock until I/O is complete. | |
141 | */ | |
142 | ||
6bac243f | 143 | static void rgrp_go_sync(struct gfs2_glock *gl) |
b3b94faa | 144 | { |
15562c43 | 145 | struct gfs2_sbd *sdp = gl->gl_name.ln_sbd; |
70d4ee94 | 146 | struct address_space *mapping = &sdp->sd_aspace; |
8339ee54 | 147 | struct gfs2_rgrpd *rgd; |
6bac243f SW |
148 | int error; |
149 | ||
f3dd1649 | 150 | spin_lock(&gl->gl_lockref.lock); |
39b0f1e9 BP |
151 | rgd = gl->gl_object; |
152 | if (rgd) | |
153 | gfs2_rgrp_brelse(rgd); | |
f3dd1649 | 154 | spin_unlock(&gl->gl_lockref.lock); |
39b0f1e9 | 155 | |
6bac243f | 156 | if (!test_and_clear_bit(GLF_DIRTY, &gl->gl_flags)) |
b5d32bea | 157 | return; |
8eae1ca0 | 158 | GLOCK_BUG_ON(gl, gl->gl_state != LM_ST_EXCLUSIVE); |
b5d32bea | 159 | |
24972557 | 160 | gfs2_log_flush(sdp, gl, NORMAL_FLUSH); |
70d4ee94 SW |
161 | filemap_fdatawrite_range(mapping, gl->gl_vm.start, gl->gl_vm.end); |
162 | error = filemap_fdatawait_range(mapping, gl->gl_vm.start, gl->gl_vm.end); | |
163 | mapping_set_error(mapping, error); | |
6bac243f | 164 | gfs2_ail_empty_gl(gl); |
7c9ca621 | 165 | |
f3dd1649 | 166 | spin_lock(&gl->gl_lockref.lock); |
8339ee54 SW |
167 | rgd = gl->gl_object; |
168 | if (rgd) | |
169 | gfs2_free_clones(rgd); | |
f3dd1649 | 170 | spin_unlock(&gl->gl_lockref.lock); |
b3b94faa DT |
171 | } |
172 | ||
173 | /** | |
6bac243f | 174 | * rgrp_go_inval - invalidate the metadata for this glock |
b3b94faa DT |
175 | * @gl: the glock |
176 | * @flags: | |
177 | * | |
6bac243f SW |
178 | * We never used LM_ST_DEFERRED with resource groups, so that we |
179 | * should always see the metadata flag set here. | |
180 | * | |
b3b94faa DT |
181 | */ |
182 | ||
6bac243f | 183 | static void rgrp_go_inval(struct gfs2_glock *gl, int flags) |
b3b94faa | 184 | { |
15562c43 | 185 | struct gfs2_sbd *sdp = gl->gl_name.ln_sbd; |
70d4ee94 | 186 | struct address_space *mapping = &sdp->sd_aspace; |
39b0f1e9 BP |
187 | struct gfs2_rgrpd *rgd = gl->gl_object; |
188 | ||
189 | if (rgd) | |
190 | gfs2_rgrp_brelse(rgd); | |
b3b94faa | 191 | |
8eae1ca0 | 192 | WARN_ON_ONCE(!(flags & DIO_METADATA)); |
70d4ee94 | 193 | gfs2_assert_withdraw(sdp, !atomic_read(&gl->gl_ail_count)); |
7005c3e4 | 194 | truncate_inode_pages_range(mapping, gl->gl_vm.start, gl->gl_vm.end); |
cf45b752 | 195 | |
39b0f1e9 | 196 | if (rgd) |
cf45b752 | 197 | rgd->rd_flags &= ~GFS2_RDF_UPTODATE; |
b3b94faa DT |
198 | } |
199 | ||
4fd1a579 AG |
200 | static struct gfs2_inode *gfs2_glock2inode(struct gfs2_glock *gl) |
201 | { | |
202 | struct gfs2_inode *ip; | |
203 | ||
204 | spin_lock(&gl->gl_lockref.lock); | |
205 | ip = gl->gl_object; | |
206 | if (ip) | |
207 | set_bit(GIF_GLOP_PENDING, &ip->i_flags); | |
208 | spin_unlock(&gl->gl_lockref.lock); | |
209 | return ip; | |
210 | } | |
211 | ||
212 | static void gfs2_clear_glop_pending(struct gfs2_inode *ip) | |
213 | { | |
214 | if (!ip) | |
215 | return; | |
216 | ||
217 | clear_bit_unlock(GIF_GLOP_PENDING, &ip->i_flags); | |
218 | wake_up_bit(&ip->i_flags, GIF_GLOP_PENDING); | |
219 | } | |
220 | ||
b5d32bea SW |
221 | /** |
222 | * inode_go_sync - Sync the dirty data and/or metadata for an inode glock | |
223 | * @gl: the glock protecting the inode | |
224 | * | |
225 | */ | |
226 | ||
227 | static void inode_go_sync(struct gfs2_glock *gl) | |
228 | { | |
4fd1a579 AG |
229 | struct gfs2_inode *ip = gfs2_glock2inode(gl); |
230 | int isreg = ip && S_ISREG(ip->i_inode.i_mode); | |
009d8518 | 231 | struct address_space *metamapping = gfs2_glock2aspace(gl); |
3042a2cc SW |
232 | int error; |
233 | ||
4fd1a579 | 234 | if (isreg) { |
582d2f7a SW |
235 | if (test_and_clear_bit(GIF_SW_PAGED, &ip->i_flags)) |
236 | unmap_shared_mapping_range(ip->i_inode.i_mapping, 0, 0); | |
237 | inode_dio_wait(&ip->i_inode); | |
238 | } | |
6bac243f | 239 | if (!test_and_clear_bit(GLF_DIRTY, &gl->gl_flags)) |
4fd1a579 | 240 | goto out; |
b5d32bea | 241 | |
8eae1ca0 | 242 | GLOCK_BUG_ON(gl, gl->gl_state != LM_ST_EXCLUSIVE); |
6bac243f | 243 | |
15562c43 | 244 | gfs2_log_flush(gl->gl_name.ln_sbd, gl, NORMAL_FLUSH); |
6bac243f | 245 | filemap_fdatawrite(metamapping); |
4fd1a579 | 246 | if (isreg) { |
6bac243f SW |
247 | struct address_space *mapping = ip->i_inode.i_mapping; |
248 | filemap_fdatawrite(mapping); | |
249 | error = filemap_fdatawait(mapping); | |
250 | mapping_set_error(mapping, error); | |
b5d32bea | 251 | } |
6bac243f SW |
252 | error = filemap_fdatawait(metamapping); |
253 | mapping_set_error(metamapping, error); | |
254 | gfs2_ail_empty_gl(gl); | |
52fcd11c SW |
255 | /* |
256 | * Writeback of the data mapping may cause the dirty flag to be set | |
257 | * so we have to clear it again here. | |
258 | */ | |
4e857c58 | 259 | smp_mb__before_atomic(); |
52fcd11c | 260 | clear_bit(GLF_DIRTY, &gl->gl_flags); |
4fd1a579 AG |
261 | |
262 | out: | |
263 | gfs2_clear_glop_pending(ip); | |
b5d32bea SW |
264 | } |
265 | ||
b3b94faa DT |
266 | /** |
267 | * inode_go_inval - prepare a inode glock to be released | |
268 | * @gl: the glock | |
269 | * @flags: | |
6b49d1d9 GU |
270 | * |
271 | * Normally we invalidate everything, but if we are moving into | |
6bac243f SW |
272 | * LM_ST_DEFERRED from LM_ST_SHARED or LM_ST_EXCLUSIVE then we |
273 | * can keep hold of the metadata, since it won't have changed. | |
b3b94faa DT |
274 | * |
275 | */ | |
276 | ||
277 | static void inode_go_inval(struct gfs2_glock *gl, int flags) | |
278 | { | |
4fd1a579 | 279 | struct gfs2_inode *ip = gfs2_glock2inode(gl); |
b3b94faa | 280 | |
15562c43 | 281 | gfs2_assert_withdraw(gl->gl_name.ln_sbd, !atomic_read(&gl->gl_ail_count)); |
6bac243f SW |
282 | |
283 | if (flags & DIO_METADATA) { | |
009d8518 | 284 | struct address_space *mapping = gfs2_glock2aspace(gl); |
6bac243f | 285 | truncate_inode_pages(mapping, 0); |
c65f7fb5 | 286 | if (ip) { |
b004157a | 287 | set_bit(GIF_INVALID, &ip->i_flags); |
c65f7fb5 | 288 | forget_all_cached_acls(&ip->i_inode); |
f39814f6 | 289 | security_inode_invalidate_secctx(&ip->i_inode); |
17d539f0 | 290 | gfs2_dir_hash_inval(ip); |
c65f7fb5 | 291 | } |
b004157a SW |
292 | } |
293 | ||
15562c43 BP |
294 | if (ip == GFS2_I(gl->gl_name.ln_sbd->sd_rindex)) { |
295 | gfs2_log_flush(gl->gl_name.ln_sbd, NULL, NORMAL_FLUSH); | |
296 | gl->gl_name.ln_sbd->sd_rindex_uptodate = 0; | |
1ce53368 | 297 | } |
3cc3f710 | 298 | if (ip && S_ISREG(ip->i_inode.i_mode)) |
b004157a | 299 | truncate_inode_pages(ip->i_inode.i_mapping, 0); |
4fd1a579 AG |
300 | |
301 | gfs2_clear_glop_pending(ip); | |
b3b94faa DT |
302 | } |
303 | ||
304 | /** | |
305 | * inode_go_demote_ok - Check to see if it's ok to unlock an inode glock | |
306 | * @gl: the glock | |
307 | * | |
308 | * Returns: 1 if it's ok | |
309 | */ | |
310 | ||
97cc1025 | 311 | static int inode_go_demote_ok(const struct gfs2_glock *gl) |
b3b94faa | 312 | { |
15562c43 | 313 | struct gfs2_sbd *sdp = gl->gl_name.ln_sbd; |
bc015cb8 | 314 | |
97cc1025 SW |
315 | if (sdp->sd_jindex == gl->gl_object || sdp->sd_rindex == gl->gl_object) |
316 | return 0; | |
bc015cb8 | 317 | |
97cc1025 | 318 | return 1; |
b3b94faa DT |
319 | } |
320 | ||
d4b2cf1b SW |
321 | /** |
322 | * gfs2_set_nlink - Set the inode's link count based on on-disk info | |
323 | * @inode: The inode in question | |
324 | * @nlink: The link count | |
325 | * | |
326 | * If the link count has hit zero, it must never be raised, whatever the | |
327 | * on-disk inode might say. When new struct inodes are created the link | |
328 | * count is set to 1, so that we can safely use this test even when reading | |
329 | * in on disk information for the first time. | |
330 | */ | |
331 | ||
332 | static void gfs2_set_nlink(struct inode *inode, u32 nlink) | |
333 | { | |
334 | /* | |
335 | * We will need to review setting the nlink count here in the | |
336 | * light of the forthcoming ro bind mount work. This is a reminder | |
337 | * to do that. | |
338 | */ | |
339 | if ((inode->i_nlink != nlink) && (inode->i_nlink != 0)) { | |
340 | if (nlink == 0) | |
341 | clear_nlink(inode); | |
342 | else | |
bfe86848 | 343 | set_nlink(inode, nlink); |
d4b2cf1b SW |
344 | } |
345 | } | |
346 | ||
347 | static int gfs2_dinode_in(struct gfs2_inode *ip, const void *buf) | |
348 | { | |
349 | const struct gfs2_dinode *str = buf; | |
350 | struct timespec atime; | |
351 | u16 height, depth; | |
352 | ||
353 | if (unlikely(ip->i_no_addr != be64_to_cpu(str->di_num.no_addr))) | |
354 | goto corrupt; | |
355 | ip->i_no_formal_ino = be64_to_cpu(str->di_num.no_formal_ino); | |
356 | ip->i_inode.i_mode = be32_to_cpu(str->di_mode); | |
357 | ip->i_inode.i_rdev = 0; | |
358 | switch (ip->i_inode.i_mode & S_IFMT) { | |
359 | case S_IFBLK: | |
360 | case S_IFCHR: | |
361 | ip->i_inode.i_rdev = MKDEV(be32_to_cpu(str->di_major), | |
362 | be32_to_cpu(str->di_minor)); | |
363 | break; | |
364 | }; | |
365 | ||
d0546426 EB |
366 | i_uid_write(&ip->i_inode, be32_to_cpu(str->di_uid)); |
367 | i_gid_write(&ip->i_inode, be32_to_cpu(str->di_gid)); | |
d4b2cf1b SW |
368 | gfs2_set_nlink(&ip->i_inode, be32_to_cpu(str->di_nlink)); |
369 | i_size_write(&ip->i_inode, be64_to_cpu(str->di_size)); | |
370 | gfs2_set_inode_blocks(&ip->i_inode, be64_to_cpu(str->di_blocks)); | |
371 | atime.tv_sec = be64_to_cpu(str->di_atime); | |
372 | atime.tv_nsec = be32_to_cpu(str->di_atime_nsec); | |
373 | if (timespec_compare(&ip->i_inode.i_atime, &atime) < 0) | |
374 | ip->i_inode.i_atime = atime; | |
375 | ip->i_inode.i_mtime.tv_sec = be64_to_cpu(str->di_mtime); | |
376 | ip->i_inode.i_mtime.tv_nsec = be32_to_cpu(str->di_mtime_nsec); | |
377 | ip->i_inode.i_ctime.tv_sec = be64_to_cpu(str->di_ctime); | |
378 | ip->i_inode.i_ctime.tv_nsec = be32_to_cpu(str->di_ctime_nsec); | |
379 | ||
380 | ip->i_goal = be64_to_cpu(str->di_goal_meta); | |
381 | ip->i_generation = be64_to_cpu(str->di_generation); | |
382 | ||
383 | ip->i_diskflags = be32_to_cpu(str->di_flags); | |
9964afbb SW |
384 | ip->i_eattr = be64_to_cpu(str->di_eattr); |
385 | /* i_diskflags and i_eattr must be set before gfs2_set_inode_flags() */ | |
d4b2cf1b SW |
386 | gfs2_set_inode_flags(&ip->i_inode); |
387 | height = be16_to_cpu(str->di_height); | |
388 | if (unlikely(height > GFS2_MAX_META_HEIGHT)) | |
389 | goto corrupt; | |
390 | ip->i_height = (u8)height; | |
391 | ||
392 | depth = be16_to_cpu(str->di_depth); | |
393 | if (unlikely(depth > GFS2_DIR_MAX_DEPTH)) | |
394 | goto corrupt; | |
395 | ip->i_depth = (u8)depth; | |
396 | ip->i_entries = be32_to_cpu(str->di_entries); | |
397 | ||
d4b2cf1b SW |
398 | if (S_ISREG(ip->i_inode.i_mode)) |
399 | gfs2_set_aops(&ip->i_inode); | |
400 | ||
401 | return 0; | |
402 | corrupt: | |
403 | gfs2_consist_inode(ip); | |
404 | return -EIO; | |
405 | } | |
406 | ||
407 | /** | |
408 | * gfs2_inode_refresh - Refresh the incore copy of the dinode | |
409 | * @ip: The GFS2 inode | |
410 | * | |
411 | * Returns: errno | |
412 | */ | |
413 | ||
414 | int gfs2_inode_refresh(struct gfs2_inode *ip) | |
415 | { | |
416 | struct buffer_head *dibh; | |
417 | int error; | |
418 | ||
419 | error = gfs2_meta_inode_buffer(ip, &dibh); | |
420 | if (error) | |
421 | return error; | |
422 | ||
d4b2cf1b SW |
423 | error = gfs2_dinode_in(ip, dibh->b_data); |
424 | brelse(dibh); | |
425 | clear_bit(GIF_INVALID, &ip->i_flags); | |
426 | ||
427 | return error; | |
428 | } | |
429 | ||
b3b94faa DT |
430 | /** |
431 | * inode_go_lock - operation done after an inode lock is locked by a process | |
432 | * @gl: the glock | |
433 | * @flags: | |
434 | * | |
435 | * Returns: errno | |
436 | */ | |
437 | ||
438 | static int inode_go_lock(struct gfs2_holder *gh) | |
439 | { | |
440 | struct gfs2_glock *gl = gh->gh_gl; | |
15562c43 | 441 | struct gfs2_sbd *sdp = gl->gl_name.ln_sbd; |
5c676f6d | 442 | struct gfs2_inode *ip = gl->gl_object; |
b3b94faa DT |
443 | int error = 0; |
444 | ||
091806ed | 445 | if (!ip || (gh->gh_flags & GL_SKIP)) |
b3b94faa DT |
446 | return 0; |
447 | ||
bfded27b | 448 | if (test_bit(GIF_INVALID, &ip->i_flags)) { |
b3b94faa DT |
449 | error = gfs2_inode_refresh(ip); |
450 | if (error) | |
451 | return error; | |
b3b94faa DT |
452 | } |
453 | ||
582d2f7a SW |
454 | if (gh->gh_state != LM_ST_DEFERRED) |
455 | inode_dio_wait(&ip->i_inode); | |
456 | ||
383f01fb | 457 | if ((ip->i_diskflags & GFS2_DIF_TRUNC_IN_PROG) && |
b3b94faa | 458 | (gl->gl_state == LM_ST_EXCLUSIVE) && |
813e0c46 SW |
459 | (gh->gh_state == LM_ST_EXCLUSIVE)) { |
460 | spin_lock(&sdp->sd_trunc_lock); | |
461 | if (list_empty(&ip->i_trunc_list)) | |
462 | list_add(&sdp->sd_trunc_list, &ip->i_trunc_list); | |
463 | spin_unlock(&sdp->sd_trunc_lock); | |
464 | wake_up(&sdp->sd_quota_wait); | |
465 | return 1; | |
466 | } | |
b3b94faa DT |
467 | |
468 | return error; | |
469 | } | |
470 | ||
6802e340 SW |
471 | /** |
472 | * inode_go_dump - print information about an inode | |
473 | * @seq: The iterator | |
474 | * @ip: the inode | |
475 | * | |
6802e340 SW |
476 | */ |
477 | ||
ac3beb6a | 478 | static void inode_go_dump(struct seq_file *seq, const struct gfs2_glock *gl) |
6802e340 SW |
479 | { |
480 | const struct gfs2_inode *ip = gl->gl_object; | |
481 | if (ip == NULL) | |
ac3beb6a | 482 | return; |
a2e0f799 | 483 | gfs2_print_dbg(seq, " I: n:%llu/%llu t:%u f:0x%02lx d:0x%08x s:%llu\n", |
6802e340 SW |
484 | (unsigned long long)ip->i_no_formal_ino, |
485 | (unsigned long long)ip->i_no_addr, | |
fa75cedc SW |
486 | IF2DT(ip->i_inode.i_mode), ip->i_flags, |
487 | (unsigned int)ip->i_diskflags, | |
a2e0f799 | 488 | (unsigned long long)i_size_read(&ip->i_inode)); |
6802e340 SW |
489 | } |
490 | ||
b3b94faa | 491 | /** |
24972557 | 492 | * freeze_go_sync - promote/demote the freeze glock |
b3b94faa DT |
493 | * @gl: the glock |
494 | * @state: the requested state | |
495 | * @flags: | |
496 | * | |
497 | */ | |
498 | ||
24972557 | 499 | static void freeze_go_sync(struct gfs2_glock *gl) |
b3b94faa | 500 | { |
2e60d768 | 501 | int error = 0; |
15562c43 | 502 | struct gfs2_sbd *sdp = gl->gl_name.ln_sbd; |
b3b94faa | 503 | |
24972557 | 504 | if (gl->gl_state == LM_ST_SHARED && |
b3b94faa | 505 | test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) { |
2e60d768 BM |
506 | atomic_set(&sdp->sd_freeze_state, SFS_STARTING_FREEZE); |
507 | error = freeze_super(sdp->sd_vfs); | |
508 | if (error) { | |
509 | printk(KERN_INFO "GFS2: couldn't freeze filesystem: %d\n", error); | |
510 | gfs2_assert_withdraw(sdp, 0); | |
511 | } | |
512 | queue_work(gfs2_freeze_wq, &sdp->sd_freeze_work); | |
513 | gfs2_log_flush(sdp, NULL, FREEZE_FLUSH); | |
b3b94faa | 514 | } |
b3b94faa DT |
515 | } |
516 | ||
517 | /** | |
24972557 | 518 | * freeze_go_xmote_bh - After promoting/demoting the freeze glock |
b3b94faa DT |
519 | * @gl: the glock |
520 | * | |
521 | */ | |
522 | ||
24972557 | 523 | static int freeze_go_xmote_bh(struct gfs2_glock *gl, struct gfs2_holder *gh) |
b3b94faa | 524 | { |
15562c43 | 525 | struct gfs2_sbd *sdp = gl->gl_name.ln_sbd; |
feaa7bba | 526 | struct gfs2_inode *ip = GFS2_I(sdp->sd_jdesc->jd_inode); |
5c676f6d | 527 | struct gfs2_glock *j_gl = ip->i_gl; |
55167622 | 528 | struct gfs2_log_header_host head; |
b3b94faa DT |
529 | int error; |
530 | ||
6802e340 | 531 | if (test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) { |
1a14d3a6 | 532 | j_gl->gl_ops->go_inval(j_gl, DIO_METADATA); |
b3b94faa DT |
533 | |
534 | error = gfs2_find_jhead(sdp->sd_jdesc, &head); | |
535 | if (error) | |
536 | gfs2_consist(sdp); | |
537 | if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) | |
538 | gfs2_consist(sdp); | |
539 | ||
540 | /* Initialize some head of the log stuff */ | |
541 | if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) { | |
542 | sdp->sd_log_sequence = head.lh_sequence + 1; | |
543 | gfs2_log_pointers_init(sdp, head.lh_blkno); | |
544 | } | |
545 | } | |
6802e340 | 546 | return 0; |
b3b94faa DT |
547 | } |
548 | ||
97cc1025 SW |
549 | /** |
550 | * trans_go_demote_ok | |
551 | * @gl: the glock | |
552 | * | |
553 | * Always returns 0 | |
554 | */ | |
555 | ||
24972557 | 556 | static int freeze_go_demote_ok(const struct gfs2_glock *gl) |
97cc1025 SW |
557 | { |
558 | return 0; | |
559 | } | |
560 | ||
b94a170e BM |
561 | /** |
562 | * iopen_go_callback - schedule the dcache entry for the inode to be deleted | |
563 | * @gl: the glock | |
564 | * | |
f3dd1649 | 565 | * gl_lockref.lock lock is held while calling this |
b94a170e | 566 | */ |
81ffbf65 | 567 | static void iopen_go_callback(struct gfs2_glock *gl, bool remote) |
b94a170e BM |
568 | { |
569 | struct gfs2_inode *ip = (struct gfs2_inode *)gl->gl_object; | |
15562c43 | 570 | struct gfs2_sbd *sdp = gl->gl_name.ln_sbd; |
001e8e8d | 571 | |
81ffbf65 | 572 | if (!remote || (sdp->sd_vfs->s_flags & MS_RDONLY)) |
001e8e8d | 573 | return; |
b94a170e BM |
574 | |
575 | if (gl->gl_demote_state == LM_ST_UNLOCKED && | |
009d8518 | 576 | gl->gl_state == LM_ST_SHARED && ip) { |
e66cf161 | 577 | gl->gl_lockref.count++; |
b94a170e | 578 | if (queue_work(gfs2_delete_workqueue, &gl->gl_delete) == 0) |
e66cf161 | 579 | gl->gl_lockref.count--; |
b94a170e BM |
580 | } |
581 | } | |
582 | ||
8fb4b536 | 583 | const struct gfs2_glock_operations gfs2_meta_glops = { |
ea67eedb | 584 | .go_type = LM_TYPE_META, |
b3b94faa DT |
585 | }; |
586 | ||
8fb4b536 | 587 | const struct gfs2_glock_operations gfs2_inode_glops = { |
06dfc306 | 588 | .go_sync = inode_go_sync, |
b3b94faa DT |
589 | .go_inval = inode_go_inval, |
590 | .go_demote_ok = inode_go_demote_ok, | |
591 | .go_lock = inode_go_lock, | |
6802e340 | 592 | .go_dump = inode_go_dump, |
ea67eedb | 593 | .go_type = LM_TYPE_INODE, |
e7ccaf5f | 594 | .go_flags = GLOF_ASPACE | GLOF_LRU, |
b3b94faa DT |
595 | }; |
596 | ||
8fb4b536 | 597 | const struct gfs2_glock_operations gfs2_rgrp_glops = { |
06dfc306 | 598 | .go_sync = rgrp_go_sync, |
6bac243f | 599 | .go_inval = rgrp_go_inval, |
7c9ca621 BP |
600 | .go_lock = gfs2_rgrp_go_lock, |
601 | .go_unlock = gfs2_rgrp_go_unlock, | |
09010978 | 602 | .go_dump = gfs2_rgrp_dump, |
ea67eedb | 603 | .go_type = LM_TYPE_RGRP, |
70d4ee94 | 604 | .go_flags = GLOF_LVB, |
b3b94faa DT |
605 | }; |
606 | ||
24972557 BM |
607 | const struct gfs2_glock_operations gfs2_freeze_glops = { |
608 | .go_sync = freeze_go_sync, | |
609 | .go_xmote_bh = freeze_go_xmote_bh, | |
610 | .go_demote_ok = freeze_go_demote_ok, | |
ea67eedb | 611 | .go_type = LM_TYPE_NONDISK, |
b3b94faa DT |
612 | }; |
613 | ||
8fb4b536 | 614 | const struct gfs2_glock_operations gfs2_iopen_glops = { |
ea67eedb | 615 | .go_type = LM_TYPE_IOPEN, |
b94a170e | 616 | .go_callback = iopen_go_callback, |
e7ccaf5f | 617 | .go_flags = GLOF_LRU, |
b3b94faa DT |
618 | }; |
619 | ||
8fb4b536 | 620 | const struct gfs2_glock_operations gfs2_flock_glops = { |
ea67eedb | 621 | .go_type = LM_TYPE_FLOCK, |
e7ccaf5f | 622 | .go_flags = GLOF_LRU, |
b3b94faa DT |
623 | }; |
624 | ||
8fb4b536 | 625 | const struct gfs2_glock_operations gfs2_nondisk_glops = { |
ea67eedb | 626 | .go_type = LM_TYPE_NONDISK, |
b3b94faa DT |
627 | }; |
628 | ||
8fb4b536 | 629 | const struct gfs2_glock_operations gfs2_quota_glops = { |
ea67eedb | 630 | .go_type = LM_TYPE_QUOTA, |
e7ccaf5f | 631 | .go_flags = GLOF_LVB | GLOF_LRU, |
b3b94faa DT |
632 | }; |
633 | ||
8fb4b536 | 634 | const struct gfs2_glock_operations gfs2_journal_glops = { |
ea67eedb | 635 | .go_type = LM_TYPE_JOURNAL, |
b3b94faa DT |
636 | }; |
637 | ||
64d576ba SW |
638 | const struct gfs2_glock_operations *gfs2_glops_list[] = { |
639 | [LM_TYPE_META] = &gfs2_meta_glops, | |
640 | [LM_TYPE_INODE] = &gfs2_inode_glops, | |
641 | [LM_TYPE_RGRP] = &gfs2_rgrp_glops, | |
64d576ba SW |
642 | [LM_TYPE_IOPEN] = &gfs2_iopen_glops, |
643 | [LM_TYPE_FLOCK] = &gfs2_flock_glops, | |
644 | [LM_TYPE_NONDISK] = &gfs2_nondisk_glops, | |
645 | [LM_TYPE_QUOTA] = &gfs2_quota_glops, | |
646 | [LM_TYPE_JOURNAL] = &gfs2_journal_glops, | |
647 | }; | |
648 |