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