blob: c53a6763bbbebf7500f4c53e9e1e38ca9806eb15 [file] [log] [blame]
Mark Fashehccd979b2005-12-15 14:31:24 -08001/* -*- mode: c; c-basic-offset: 8; -*-
2 * vim: noexpandtab sw=8 ts=8 sts=0:
3 *
4 * inode.c
5 *
6 * vfs' aops, fops, dops and iops
7 *
8 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public
12 * License as published by the Free Software Foundation; either
13 * version 2 of the License, or (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public
21 * License along with this program; if not, write to the
22 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
23 * Boston, MA 021110-1307, USA.
24 */
25
26#include <linux/fs.h>
27#include <linux/types.h>
28#include <linux/slab.h>
29#include <linux/highmem.h>
30#include <linux/pagemap.h>
Mark Fashehccd979b2005-12-15 14:31:24 -080031
32#include <asm/byteorder.h>
33
34#define MLOG_MASK_PREFIX ML_INODE
35#include <cluster/masklog.h>
36
37#include "ocfs2.h"
38
39#include "alloc.h"
40#include "dlmglue.h"
41#include "extent_map.h"
42#include "file.h"
Mark Fashehb4df6ed2006-02-22 17:35:08 -080043#include "heartbeat.h"
Mark Fashehccd979b2005-12-15 14:31:24 -080044#include "inode.h"
45#include "journal.h"
46#include "namei.h"
47#include "suballoc.h"
48#include "super.h"
49#include "symlink.h"
50#include "sysfile.h"
51#include "uptodate.h"
52#include "vote.h"
53
54#include "buffer_head_io.h"
55
Mark Fashehccd979b2005-12-15 14:31:24 -080056struct ocfs2_find_inode_args
57{
58 u64 fi_blkno;
59 unsigned long fi_ino;
60 unsigned int fi_flags;
61};
62
63static int ocfs2_read_locked_inode(struct inode *inode,
64 struct ocfs2_find_inode_args *args);
65static int ocfs2_init_locked_inode(struct inode *inode, void *opaque);
66static int ocfs2_find_actor(struct inode *inode, void *opaque);
67static int ocfs2_truncate_for_delete(struct ocfs2_super *osb,
68 struct inode *inode,
69 struct buffer_head *fe_bh);
70
Herbert Poetzlca4d1472006-07-03 17:27:12 -070071void ocfs2_set_inode_flags(struct inode *inode)
72{
73 unsigned int flags = OCFS2_I(inode)->ip_attr;
74
75 inode->i_flags &= ~(S_IMMUTABLE |
76 S_SYNC | S_APPEND | S_NOATIME | S_DIRSYNC);
77
78 if (flags & OCFS2_IMMUTABLE_FL)
79 inode->i_flags |= S_IMMUTABLE;
80
81 if (flags & OCFS2_SYNC_FL)
82 inode->i_flags |= S_SYNC;
83 if (flags & OCFS2_APPEND_FL)
84 inode->i_flags |= S_APPEND;
85 if (flags & OCFS2_NOATIME_FL)
86 inode->i_flags |= S_NOATIME;
87 if (flags & OCFS2_DIRSYNC_FL)
88 inode->i_flags |= S_DIRSYNC;
89}
90
Jan Kara6e4b0d52007-04-27 11:08:01 -070091/* Propagate flags from i_flags to OCFS2_I(inode)->ip_attr */
92void ocfs2_get_inode_flags(struct ocfs2_inode_info *oi)
93{
94 unsigned int flags = oi->vfs_inode.i_flags;
95
96 oi->ip_attr &= ~(OCFS2_SYNC_FL|OCFS2_APPEND_FL|
97 OCFS2_IMMUTABLE_FL|OCFS2_NOATIME_FL|OCFS2_DIRSYNC_FL);
98 if (flags & S_SYNC)
99 oi->ip_attr |= OCFS2_SYNC_FL;
100 if (flags & S_APPEND)
101 oi->ip_attr |= OCFS2_APPEND_FL;
102 if (flags & S_IMMUTABLE)
103 oi->ip_attr |= OCFS2_IMMUTABLE_FL;
104 if (flags & S_NOATIME)
105 oi->ip_attr |= OCFS2_NOATIME_FL;
106 if (flags & S_DIRSYNC)
107 oi->ip_attr |= OCFS2_DIRSYNC_FL;
108}
109
Mark Fasheh24c19ef2006-09-22 17:28:19 -0700110struct inode *ocfs2_iget(struct ocfs2_super *osb, u64 blkno, int flags)
Mark Fashehccd979b2005-12-15 14:31:24 -0800111{
112 struct inode *inode = NULL;
113 struct super_block *sb = osb->sb;
114 struct ocfs2_find_inode_args args;
115
Mark Fashehb06970532006-03-03 10:24:33 -0800116 mlog_entry("(blkno = %llu)\n", (unsigned long long)blkno);
Mark Fashehccd979b2005-12-15 14:31:24 -0800117
118 /* Ok. By now we've either got the offsets passed to us by the
119 * caller, or we just pulled them off the bh. Lets do some
120 * sanity checks to make sure they're OK. */
121 if (blkno == 0) {
122 inode = ERR_PTR(-EINVAL);
123 mlog_errno(PTR_ERR(inode));
124 goto bail;
125 }
126
127 args.fi_blkno = blkno;
Mark Fasheh24c19ef2006-09-22 17:28:19 -0700128 args.fi_flags = flags;
Mark Fashehccd979b2005-12-15 14:31:24 -0800129 args.fi_ino = ino_from_blkno(sb, blkno);
130
131 inode = iget5_locked(sb, args.fi_ino, ocfs2_find_actor,
132 ocfs2_init_locked_inode, &args);
133 /* inode was *not* in the inode cache. 2.6.x requires
134 * us to do our own read_inode call and unlock it
135 * afterwards. */
136 if (inode && inode->i_state & I_NEW) {
137 mlog(0, "Inode was not in inode cache, reading it.\n");
138 ocfs2_read_locked_inode(inode, &args);
139 unlock_new_inode(inode);
140 }
141 if (inode == NULL) {
142 inode = ERR_PTR(-ENOMEM);
143 mlog_errno(PTR_ERR(inode));
144 goto bail;
145 }
146 if (is_bad_inode(inode)) {
147 iput(inode);
148 inode = ERR_PTR(-ESTALE);
Mark Fashehccd979b2005-12-15 14:31:24 -0800149 goto bail;
150 }
151
152bail:
153 if (!IS_ERR(inode)) {
Mark Fashehb06970532006-03-03 10:24:33 -0800154 mlog(0, "returning inode with number %llu\n",
155 (unsigned long long)OCFS2_I(inode)->ip_blkno);
Mark Fashehccd979b2005-12-15 14:31:24 -0800156 mlog_exit_ptr(inode);
Mark Fasheh6a1bd4a2007-01-03 17:06:59 -0800157 }
Mark Fashehccd979b2005-12-15 14:31:24 -0800158
159 return inode;
160}
161
162
163/*
164 * here's how inodes get read from disk:
165 * iget5_locked -> find_actor -> OCFS2_FIND_ACTOR
166 * found? : return the in-memory inode
167 * not found? : get_new_inode -> OCFS2_INIT_LOCKED_INODE
168 */
169
170static int ocfs2_find_actor(struct inode *inode, void *opaque)
171{
172 struct ocfs2_find_inode_args *args = NULL;
173 struct ocfs2_inode_info *oi = OCFS2_I(inode);
174 int ret = 0;
175
176 mlog_entry("(0x%p, %lu, 0x%p)\n", inode, inode->i_ino, opaque);
177
178 args = opaque;
179
180 mlog_bug_on_msg(!inode, "No inode in find actor!\n");
181
182 if (oi->ip_blkno != args->fi_blkno)
183 goto bail;
184
Mark Fashehccd979b2005-12-15 14:31:24 -0800185 ret = 1;
186bail:
187 mlog_exit(ret);
188 return ret;
189}
190
191/*
192 * initialize the new inode, but don't do anything that would cause
193 * us to sleep.
194 * return 0 on success, 1 on failure
195 */
196static int ocfs2_init_locked_inode(struct inode *inode, void *opaque)
197{
198 struct ocfs2_find_inode_args *args = opaque;
199
200 mlog_entry("inode = %p, opaque = %p\n", inode, opaque);
201
202 inode->i_ino = args->fi_ino;
203 OCFS2_I(inode)->ip_blkno = args->fi_blkno;
204
205 mlog_exit(0);
206 return 0;
207}
208
209int ocfs2_populate_inode(struct inode *inode, struct ocfs2_dinode *fe,
210 int create_ino)
211{
212 struct super_block *sb;
213 struct ocfs2_super *osb;
214 int status = -EINVAL;
215
Mark Fashehb06970532006-03-03 10:24:33 -0800216 mlog_entry("(0x%p, size:%llu)\n", inode,
Mark Fasheh1ca1a112007-04-27 16:01:25 -0700217 (unsigned long long)le64_to_cpu(fe->i_size));
Mark Fashehccd979b2005-12-15 14:31:24 -0800218
219 sb = inode->i_sb;
220 osb = OCFS2_SB(sb);
221
222 /* this means that read_inode cannot create a superblock inode
223 * today. change if needed. */
224 if (!OCFS2_IS_VALID_DINODE(fe) ||
225 !(fe->i_flags & cpu_to_le32(OCFS2_VALID_FL))) {
Mark Fasheh6a1bd4a2007-01-03 17:06:59 -0800226 mlog(0, "Invalid dinode: i_ino=%lu, i_blkno=%llu, "
Mark Fashehccd979b2005-12-15 14:31:24 -0800227 "signature = %.*s, flags = 0x%x\n",
Mark Fashehb06970532006-03-03 10:24:33 -0800228 inode->i_ino,
229 (unsigned long long)le64_to_cpu(fe->i_blkno), 7,
Mark Fashehccd979b2005-12-15 14:31:24 -0800230 fe->i_signature, le32_to_cpu(fe->i_flags));
231 goto bail;
232 }
233
234 if (le32_to_cpu(fe->i_fs_generation) != osb->fs_generation) {
235 mlog(ML_ERROR, "file entry generation does not match "
236 "superblock! osb->fs_generation=%x, "
237 "fe->i_fs_generation=%x\n",
238 osb->fs_generation, le32_to_cpu(fe->i_fs_generation));
239 goto bail;
240 }
241
Mark Fasheh8110b072007-03-22 16:53:23 -0700242 OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
243 OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr);
244
Mark Fashehccd979b2005-12-15 14:31:24 -0800245 inode->i_version = 1;
246 inode->i_generation = le32_to_cpu(fe->i_generation);
247 inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
248 inode->i_mode = le16_to_cpu(fe->i_mode);
249 inode->i_uid = le32_to_cpu(fe->i_uid);
250 inode->i_gid = le32_to_cpu(fe->i_gid);
Mark Fashehccd979b2005-12-15 14:31:24 -0800251
252 /* Fast symlinks will have i_size but no allocated clusters. */
253 if (S_ISLNK(inode->i_mode) && !fe->i_clusters)
254 inode->i_blocks = 0;
255 else
Mark Fasheh8110b072007-03-22 16:53:23 -0700256 inode->i_blocks = ocfs2_inode_sector_count(inode);
Mark Fashehccd979b2005-12-15 14:31:24 -0800257 inode->i_mapping->a_ops = &ocfs2_aops;
Mark Fashehccd979b2005-12-15 14:31:24 -0800258 inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime);
259 inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec);
260 inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime);
261 inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec);
262 inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime);
263 inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec);
264
265 if (OCFS2_I(inode)->ip_blkno != le64_to_cpu(fe->i_blkno))
266 mlog(ML_ERROR,
Mark Fashehb06970532006-03-03 10:24:33 -0800267 "ip_blkno %llu != i_blkno %llu!\n",
268 (unsigned long long)OCFS2_I(inode)->ip_blkno,
Mark Fasheh1ca1a112007-04-27 16:01:25 -0700269 (unsigned long long)le64_to_cpu(fe->i_blkno));
Mark Fashehccd979b2005-12-15 14:31:24 -0800270
Mark Fashehccd979b2005-12-15 14:31:24 -0800271 inode->i_nlink = le16_to_cpu(fe->i_links_count);
272
Mark Fasheh24c19ef2006-09-22 17:28:19 -0700273 if (fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL))
274 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SYSTEM_FILE;
275
Mark Fashehccd979b2005-12-15 14:31:24 -0800276 if (fe->i_flags & cpu_to_le32(OCFS2_LOCAL_ALLOC_FL)) {
277 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
278 mlog(0, "local alloc inode: i_ino=%lu\n", inode->i_ino);
279 } else if (fe->i_flags & cpu_to_le32(OCFS2_BITMAP_FL)) {
280 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_BITMAP;
281 } else if (fe->i_flags & cpu_to_le32(OCFS2_SUPER_BLOCK_FL)) {
282 mlog(0, "superblock inode: i_ino=%lu\n", inode->i_ino);
283 /* we can't actually hit this as read_inode can't
284 * handle superblocks today ;-) */
285 BUG();
286 }
287
288 switch (inode->i_mode & S_IFMT) {
289 case S_IFREG:
290 inode->i_fop = &ocfs2_fops;
291 inode->i_op = &ocfs2_file_iops;
292 i_size_write(inode, le64_to_cpu(fe->i_size));
293 break;
294 case S_IFDIR:
295 inode->i_op = &ocfs2_dir_iops;
296 inode->i_fop = &ocfs2_dops;
297 i_size_write(inode, le64_to_cpu(fe->i_size));
298 break;
299 case S_IFLNK:
300 if (ocfs2_inode_is_fast_symlink(inode))
301 inode->i_op = &ocfs2_fast_symlink_inode_operations;
302 else
303 inode->i_op = &ocfs2_symlink_inode_operations;
304 i_size_write(inode, le64_to_cpu(fe->i_size));
305 break;
306 default:
307 inode->i_op = &ocfs2_special_file_iops;
308 init_special_inode(inode, inode->i_mode,
309 inode->i_rdev);
310 break;
311 }
312
Mark Fasheh24c19ef2006-09-22 17:28:19 -0700313 if (create_ino) {
314 inode->i_ino = ino_from_blkno(inode->i_sb,
315 le64_to_cpu(fe->i_blkno));
316
317 /*
318 * If we ever want to create system files from kernel,
319 * the generation argument to
320 * ocfs2_inode_lock_res_init() will have to change.
321 */
Mark Fasheh1ca1a112007-04-27 16:01:25 -0700322 BUG_ON(le32_to_cpu(fe->i_flags) & OCFS2_SYSTEM_FL);
Mark Fasheh24c19ef2006-09-22 17:28:19 -0700323
324 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_meta_lockres,
325 OCFS2_LOCK_TYPE_META, 0, inode);
Tiger Yang50008632007-03-20 16:01:38 -0700326
327 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres,
328 OCFS2_LOCK_TYPE_OPEN, 0, inode);
Mark Fasheh24c19ef2006-09-22 17:28:19 -0700329 }
330
Mark Fashehccd979b2005-12-15 14:31:24 -0800331 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_rw_lockres,
Mark Fasheh24c19ef2006-09-22 17:28:19 -0700332 OCFS2_LOCK_TYPE_RW, inode->i_generation,
333 inode);
334
Mark Fashehccd979b2005-12-15 14:31:24 -0800335 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_data_lockres,
Mark Fasheh24c19ef2006-09-22 17:28:19 -0700336 OCFS2_LOCK_TYPE_DATA, inode->i_generation,
337 inode);
Mark Fashehccd979b2005-12-15 14:31:24 -0800338
Herbert Poetzlca4d1472006-07-03 17:27:12 -0700339 ocfs2_set_inode_flags(inode);
Herbert Poetzlca4d1472006-07-03 17:27:12 -0700340
Mark Fashehccd979b2005-12-15 14:31:24 -0800341 status = 0;
342bail:
343 mlog_exit(status);
344 return status;
345}
346
347static int ocfs2_read_locked_inode(struct inode *inode,
348 struct ocfs2_find_inode_args *args)
349{
350 struct super_block *sb;
351 struct ocfs2_super *osb;
352 struct ocfs2_dinode *fe;
353 struct buffer_head *bh = NULL;
Mark Fasheh24c19ef2006-09-22 17:28:19 -0700354 int status, can_lock;
355 u32 generation = 0;
Mark Fashehccd979b2005-12-15 14:31:24 -0800356
357 mlog_entry("(0x%p, 0x%p)\n", inode, args);
358
359 status = -EINVAL;
360 if (inode == NULL || inode->i_sb == NULL) {
361 mlog(ML_ERROR, "bad inode\n");
Mark Fasheh24c19ef2006-09-22 17:28:19 -0700362 return status;
Mark Fashehccd979b2005-12-15 14:31:24 -0800363 }
364 sb = inode->i_sb;
365 osb = OCFS2_SB(sb);
366
367 if (!args) {
368 mlog(ML_ERROR, "bad inode args\n");
369 make_bad_inode(inode);
Mark Fasheh24c19ef2006-09-22 17:28:19 -0700370 return status;
Mark Fashehccd979b2005-12-15 14:31:24 -0800371 }
372
Mark Fasheh24c19ef2006-09-22 17:28:19 -0700373 /*
374 * To improve performance of cold-cache inode stats, we take
375 * the cluster lock here if possible.
376 *
377 * Generally, OCFS2 never trusts the contents of an inode
378 * unless it's holding a cluster lock, so taking it here isn't
379 * a correctness issue as much as it is a performance
380 * improvement.
381 *
382 * There are three times when taking the lock is not a good idea:
383 *
384 * 1) During startup, before we have initialized the DLM.
385 *
386 * 2) If we are reading certain system files which never get
387 * cluster locks (local alloc, truncate log).
388 *
389 * 3) If the process doing the iget() is responsible for
390 * orphan dir recovery. We're holding the orphan dir lock and
391 * can get into a deadlock with another process on another
392 * node in ->delete_inode().
393 *
394 * #1 and #2 can be simply solved by never taking the lock
395 * here for system files (which are the only type we read
396 * during mount). It's a heavier approach, but our main
397 * concern is user-accesible files anyway.
398 *
399 * #3 works itself out because we'll eventually take the
400 * cluster lock before trusting anything anyway.
401 */
402 can_lock = !(args->fi_flags & OCFS2_FI_FLAG_SYSFILE)
Tiger Yang50008632007-03-20 16:01:38 -0700403 && !(args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY)
Sunil Mushranc271c5c2006-12-05 17:56:35 -0800404 && !ocfs2_mount_local(osb);
Mark Fasheh24c19ef2006-09-22 17:28:19 -0700405
406 /*
407 * To maintain backwards compatibility with older versions of
408 * ocfs2-tools, we still store the generation value for system
409 * files. The only ones that actually matter to userspace are
410 * the journals, but it's easier and inexpensive to just flag
411 * all system files similarly.
412 */
413 if (args->fi_flags & OCFS2_FI_FLAG_SYSFILE)
414 generation = osb->fs_generation;
415
416 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_meta_lockres,
417 OCFS2_LOCK_TYPE_META,
418 generation, inode);
419
Tiger Yang50008632007-03-20 16:01:38 -0700420 ocfs2_inode_lock_res_init(&OCFS2_I(inode)->ip_open_lockres,
421 OCFS2_LOCK_TYPE_OPEN,
422 0, inode);
423
Mark Fasheh24c19ef2006-09-22 17:28:19 -0700424 if (can_lock) {
Tiger Yang50008632007-03-20 16:01:38 -0700425 status = ocfs2_open_lock(inode);
426 if (status) {
427 make_bad_inode(inode);
428 mlog_errno(status);
429 return status;
430 }
Mark Fasheh4bcec182006-10-09 16:02:40 -0700431 status = ocfs2_meta_lock(inode, NULL, 0);
Mark Fasheh24c19ef2006-09-22 17:28:19 -0700432 if (status) {
433 make_bad_inode(inode);
434 mlog_errno(status);
435 return status;
436 }
437 }
438
Tiger Yang50008632007-03-20 16:01:38 -0700439 if (args->fi_flags & OCFS2_FI_FLAG_ORPHAN_RECOVERY) {
440 status = ocfs2_try_open_lock(inode, 0);
441 if (status) {
442 make_bad_inode(inode);
443 return status;
444 }
445 }
446
Mark Fasheh24c19ef2006-09-22 17:28:19 -0700447 status = ocfs2_read_block(osb, args->fi_blkno, &bh, 0,
448 can_lock ? inode : NULL);
Mark Fashehccd979b2005-12-15 14:31:24 -0800449 if (status < 0) {
450 mlog_errno(status);
Mark Fashehccd979b2005-12-15 14:31:24 -0800451 goto bail;
452 }
453
Mark Fasheh24c19ef2006-09-22 17:28:19 -0700454 status = -EINVAL;
Mark Fashehccd979b2005-12-15 14:31:24 -0800455 fe = (struct ocfs2_dinode *) bh->b_data;
456 if (!OCFS2_IS_VALID_DINODE(fe)) {
Mark Fashehb06970532006-03-03 10:24:33 -0800457 mlog(ML_ERROR, "Invalid dinode #%llu: signature = %.*s\n",
Mark Fasheh1ca1a112007-04-27 16:01:25 -0700458 (unsigned long long)le64_to_cpu(fe->i_blkno), 7,
459 fe->i_signature);
Mark Fashehccd979b2005-12-15 14:31:24 -0800460 goto bail;
461 }
462
Mark Fasheh24c19ef2006-09-22 17:28:19 -0700463 /*
464 * This is a code bug. Right now the caller needs to
465 * understand whether it is asking for a system file inode or
466 * not so the proper lock names can be built.
467 */
468 mlog_bug_on_msg(!!(fe->i_flags & cpu_to_le32(OCFS2_SYSTEM_FL)) !=
469 !!(args->fi_flags & OCFS2_FI_FLAG_SYSFILE),
470 "Inode %llu: system file state is ambigous\n",
471 (unsigned long long)args->fi_blkno);
Mark Fashehccd979b2005-12-15 14:31:24 -0800472
473 if (S_ISCHR(le16_to_cpu(fe->i_mode)) ||
474 S_ISBLK(le16_to_cpu(fe->i_mode)))
475 inode->i_rdev = huge_decode_dev(le64_to_cpu(fe->id1.dev1.i_rdev));
476
Mark Fasheh6a1bd4a2007-01-03 17:06:59 -0800477 if (ocfs2_populate_inode(inode, fe, 0) < 0)
Mark Fashehccd979b2005-12-15 14:31:24 -0800478 goto bail;
Mark Fashehccd979b2005-12-15 14:31:24 -0800479
480 BUG_ON(args->fi_blkno != le64_to_cpu(fe->i_blkno));
481
Mark Fashehccd979b2005-12-15 14:31:24 -0800482 status = 0;
483
484bail:
Mark Fasheh24c19ef2006-09-22 17:28:19 -0700485 if (can_lock)
486 ocfs2_meta_unlock(inode, 0);
487
488 if (status < 0)
489 make_bad_inode(inode);
490
Mark Fashehccd979b2005-12-15 14:31:24 -0800491 if (args && bh)
492 brelse(bh);
493
494 mlog_exit(status);
495 return status;
496}
497
498void ocfs2_sync_blockdev(struct super_block *sb)
499{
500 sync_blockdev(sb->s_bdev);
501}
502
503static int ocfs2_truncate_for_delete(struct ocfs2_super *osb,
504 struct inode *inode,
505 struct buffer_head *fe_bh)
506{
507 int status = 0;
Mark Fashehccd979b2005-12-15 14:31:24 -0800508 struct ocfs2_truncate_context *tc = NULL;
509 struct ocfs2_dinode *fe;
Mark Fasheh60b11392007-02-16 11:46:50 -0800510 handle_t *handle = NULL;
Mark Fashehccd979b2005-12-15 14:31:24 -0800511
512 mlog_entry_void();
513
514 fe = (struct ocfs2_dinode *) fe_bh->b_data;
515
Mark Fasheh3a0782d2007-01-17 12:53:31 -0800516 if (fe->i_clusters) {
Mark Fasheh60b11392007-02-16 11:46:50 -0800517 handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
518 if (IS_ERR(handle)) {
519 status = PTR_ERR(handle);
520 mlog_errno(status);
521 goto out;
522 }
523
524 status = ocfs2_journal_access(handle, inode, fe_bh,
525 OCFS2_JOURNAL_ACCESS_WRITE);
526 if (status < 0) {
527 mlog_errno(status);
528 goto out;
529 }
530
531 i_size_write(inode, 0);
532
533 status = ocfs2_mark_inode_dirty(handle, inode, fe_bh);
534 if (status < 0) {
535 mlog_errno(status);
536 goto out;
537 }
538
539 ocfs2_commit_trans(osb, handle);
540 handle = NULL;
541
Mark Fasheh3a0782d2007-01-17 12:53:31 -0800542 status = ocfs2_prepare_truncate(osb, inode, fe_bh, &tc);
543 if (status < 0) {
544 mlog_errno(status);
545 goto out;
546 }
Mark Fashehccd979b2005-12-15 14:31:24 -0800547
Mark Fasheh3a0782d2007-01-17 12:53:31 -0800548 status = ocfs2_commit_truncate(osb, inode, fe_bh, tc);
549 if (status < 0) {
550 mlog_errno(status);
551 goto out;
552 }
Mark Fashehccd979b2005-12-15 14:31:24 -0800553 }
Mark Fashehccd979b2005-12-15 14:31:24 -0800554
Mark Fasheh60b11392007-02-16 11:46:50 -0800555out:
556 if (handle)
557 ocfs2_commit_trans(osb, handle);
Mark Fashehccd979b2005-12-15 14:31:24 -0800558 mlog_exit(status);
559 return status;
560}
561
562static int ocfs2_remove_inode(struct inode *inode,
563 struct buffer_head *di_bh,
564 struct inode *orphan_dir_inode,
565 struct buffer_head *orphan_dir_bh)
566{
567 int status;
568 struct inode *inode_alloc_inode = NULL;
569 struct buffer_head *inode_alloc_bh = NULL;
Mark Fasheh1fabe142006-10-09 18:11:45 -0700570 handle_t *handle;
Mark Fashehccd979b2005-12-15 14:31:24 -0800571 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
572 struct ocfs2_dinode *di = (struct ocfs2_dinode *) di_bh->b_data;
573
574 inode_alloc_inode =
575 ocfs2_get_system_file_inode(osb, INODE_ALLOC_SYSTEM_INODE,
576 le16_to_cpu(di->i_suballoc_slot));
577 if (!inode_alloc_inode) {
578 status = -EEXIST;
579 mlog_errno(status);
580 goto bail;
581 }
582
Jes Sorensen1b1dcc12006-01-09 15:59:24 -0800583 mutex_lock(&inode_alloc_inode->i_mutex);
Mark Fasheh4bcec182006-10-09 16:02:40 -0700584 status = ocfs2_meta_lock(inode_alloc_inode, &inode_alloc_bh, 1);
Mark Fashehccd979b2005-12-15 14:31:24 -0800585 if (status < 0) {
Jes Sorensen1b1dcc12006-01-09 15:59:24 -0800586 mutex_unlock(&inode_alloc_inode->i_mutex);
Mark Fashehccd979b2005-12-15 14:31:24 -0800587
588 mlog_errno(status);
589 goto bail;
590 }
591
Mark Fasheh65eff9c2006-10-09 17:26:22 -0700592 handle = ocfs2_start_trans(osb, OCFS2_DELETE_INODE_CREDITS);
Mark Fashehccd979b2005-12-15 14:31:24 -0800593 if (IS_ERR(handle)) {
594 status = PTR_ERR(handle);
595 mlog_errno(status);
596 goto bail_unlock;
597 }
598
599 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
600 orphan_dir_bh);
601 if (status < 0) {
602 mlog_errno(status);
603 goto bail_commit;
604 }
605
606 /* set the inodes dtime */
607 status = ocfs2_journal_access(handle, inode, di_bh,
608 OCFS2_JOURNAL_ACCESS_WRITE);
609 if (status < 0) {
610 mlog_errno(status);
611 goto bail_commit;
612 }
613
614 di->i_dtime = cpu_to_le64(CURRENT_TIME.tv_sec);
615 le32_and_cpu(&di->i_flags, ~(OCFS2_VALID_FL | OCFS2_ORPHANED_FL));
616
617 status = ocfs2_journal_dirty(handle, di_bh);
618 if (status < 0) {
619 mlog_errno(status);
620 goto bail_commit;
621 }
622
623 ocfs2_remove_from_cache(inode, di_bh);
624
625 status = ocfs2_free_dinode(handle, inode_alloc_inode,
626 inode_alloc_bh, di);
627 if (status < 0)
628 mlog_errno(status);
629
630bail_commit:
Mark Fasheh02dc1af2006-10-09 16:48:10 -0700631 ocfs2_commit_trans(osb, handle);
Mark Fashehccd979b2005-12-15 14:31:24 -0800632bail_unlock:
633 ocfs2_meta_unlock(inode_alloc_inode, 1);
Jes Sorensen1b1dcc12006-01-09 15:59:24 -0800634 mutex_unlock(&inode_alloc_inode->i_mutex);
Mark Fashehccd979b2005-12-15 14:31:24 -0800635 brelse(inode_alloc_bh);
636bail:
637 iput(inode_alloc_inode);
638
639 return status;
640}
641
Mark Fashehb4df6ed2006-02-22 17:35:08 -0800642/*
643 * Serialize with orphan dir recovery. If the process doing
644 * recovery on this orphan dir does an iget() with the dir
645 * i_mutex held, we'll deadlock here. Instead we detect this
646 * and exit early - recovery will wipe this inode for us.
647 */
648static int ocfs2_check_orphan_recovery_state(struct ocfs2_super *osb,
649 int slot)
650{
651 int ret = 0;
652
653 spin_lock(&osb->osb_lock);
654 if (ocfs2_node_map_test_bit(osb, &osb->osb_recovering_orphan_dirs, slot)) {
655 mlog(0, "Recovery is happening on orphan dir %d, will skip "
656 "this inode\n", slot);
657 ret = -EDEADLK;
658 goto out;
659 }
660 /* This signals to the orphan recovery process that it should
661 * wait for us to handle the wipe. */
662 osb->osb_orphan_wipes[slot]++;
663out:
664 spin_unlock(&osb->osb_lock);
665 return ret;
666}
667
668static void ocfs2_signal_wipe_completion(struct ocfs2_super *osb,
669 int slot)
670{
671 spin_lock(&osb->osb_lock);
672 osb->osb_orphan_wipes[slot]--;
673 spin_unlock(&osb->osb_lock);
674
675 wake_up(&osb->osb_wipe_event);
676}
677
Mark Fashehccd979b2005-12-15 14:31:24 -0800678static int ocfs2_wipe_inode(struct inode *inode,
679 struct buffer_head *di_bh)
680{
681 int status, orphaned_slot;
682 struct inode *orphan_dir_inode = NULL;
683 struct buffer_head *orphan_dir_bh = NULL;
684 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
Tiger Yang50008632007-03-20 16:01:38 -0700685 struct ocfs2_dinode *di;
Mark Fashehccd979b2005-12-15 14:31:24 -0800686
Tiger Yang50008632007-03-20 16:01:38 -0700687 di = (struct ocfs2_dinode *) di_bh->b_data;
688 orphaned_slot = le16_to_cpu(di->i_orphaned_slot);
Mark Fashehb4df6ed2006-02-22 17:35:08 -0800689
690 status = ocfs2_check_orphan_recovery_state(osb, orphaned_slot);
691 if (status)
692 return status;
693
Mark Fashehccd979b2005-12-15 14:31:24 -0800694 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
695 ORPHAN_DIR_SYSTEM_INODE,
696 orphaned_slot);
697 if (!orphan_dir_inode) {
698 status = -EEXIST;
699 mlog_errno(status);
700 goto bail;
701 }
702
703 /* Lock the orphan dir. The lock will be held for the entire
704 * delete_inode operation. We do this now to avoid races with
705 * recovery completion on other nodes. */
Jes Sorensen1b1dcc12006-01-09 15:59:24 -0800706 mutex_lock(&orphan_dir_inode->i_mutex);
Mark Fasheh4bcec182006-10-09 16:02:40 -0700707 status = ocfs2_meta_lock(orphan_dir_inode, &orphan_dir_bh, 1);
Mark Fashehccd979b2005-12-15 14:31:24 -0800708 if (status < 0) {
Jes Sorensen1b1dcc12006-01-09 15:59:24 -0800709 mutex_unlock(&orphan_dir_inode->i_mutex);
Mark Fashehccd979b2005-12-15 14:31:24 -0800710
711 mlog_errno(status);
712 goto bail;
713 }
714
715 /* we do this while holding the orphan dir lock because we
716 * don't want recovery being run from another node to vote for
717 * an inode delete on us -- this will result in two nodes
718 * truncating the same file! */
719 status = ocfs2_truncate_for_delete(osb, inode, di_bh);
720 if (status < 0) {
721 mlog_errno(status);
722 goto bail_unlock_dir;
723 }
724
725 status = ocfs2_remove_inode(inode, di_bh, orphan_dir_inode,
726 orphan_dir_bh);
727 if (status < 0)
728 mlog_errno(status);
729
730bail_unlock_dir:
731 ocfs2_meta_unlock(orphan_dir_inode, 1);
Jes Sorensen1b1dcc12006-01-09 15:59:24 -0800732 mutex_unlock(&orphan_dir_inode->i_mutex);
Mark Fashehccd979b2005-12-15 14:31:24 -0800733 brelse(orphan_dir_bh);
734bail:
735 iput(orphan_dir_inode);
Mark Fashehb4df6ed2006-02-22 17:35:08 -0800736 ocfs2_signal_wipe_completion(osb, orphaned_slot);
Mark Fashehccd979b2005-12-15 14:31:24 -0800737
738 return status;
739}
740
741/* There is a series of simple checks that should be done before a
742 * vote is even considered. Encapsulate those in this function. */
743static int ocfs2_inode_is_valid_to_delete(struct inode *inode)
744{
745 int ret = 0;
746 struct ocfs2_inode_info *oi = OCFS2_I(inode);
747 struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
748
749 /* We shouldn't be getting here for the root directory
750 * inode.. */
751 if (inode == osb->root_inode) {
752 mlog(ML_ERROR, "Skipping delete of root inode.\n");
753 goto bail;
754 }
755
756 /* If we're coming from process_vote we can't go into our own
757 * voting [hello, deadlock city!], so unforuntately we just
758 * have to skip deleting this guy. That's OK though because
759 * the node who's doing the actual deleting should handle it
760 * anyway. */
761 if (current == osb->vote_task) {
762 mlog(0, "Skipping delete of %lu because we're currently "
763 "in process_vote\n", inode->i_ino);
764 goto bail;
765 }
766
767 spin_lock(&oi->ip_lock);
768 /* OCFS2 *never* deletes system files. This should technically
769 * never get here as system file inodes should always have a
770 * positive link count. */
771 if (oi->ip_flags & OCFS2_INODE_SYSTEM_FILE) {
Mark Fashehb06970532006-03-03 10:24:33 -0800772 mlog(ML_ERROR, "Skipping delete of system file %llu\n",
773 (unsigned long long)oi->ip_blkno);
Mark Fashehccd979b2005-12-15 14:31:24 -0800774 goto bail_unlock;
775 }
776
777 /* If we have voted "yes" on the wipe of this inode for
778 * another node, it will be marked here so we can safely skip
779 * it. Recovery will cleanup any inodes we might inadvertantly
780 * skip here. */
781 if (oi->ip_flags & OCFS2_INODE_SKIP_DELETE) {
782 mlog(0, "Skipping delete of %lu because another node "
783 "has done this for us.\n", inode->i_ino);
784 goto bail_unlock;
785 }
786
787 ret = 1;
788bail_unlock:
789 spin_unlock(&oi->ip_lock);
790bail:
791 return ret;
792}
793
794/* Query the cluster to determine whether we should wipe an inode from
795 * disk or not.
796 *
797 * Requires the inode to have the cluster lock. */
798static int ocfs2_query_inode_wipe(struct inode *inode,
799 struct buffer_head *di_bh,
800 int *wipe)
801{
802 int status = 0;
803 struct ocfs2_inode_info *oi = OCFS2_I(inode);
804 struct ocfs2_dinode *di;
805
806 *wipe = 0;
807
808 /* While we were waiting for the cluster lock in
809 * ocfs2_delete_inode, another node might have asked to delete
810 * the inode. Recheck our flags to catch this. */
811 if (!ocfs2_inode_is_valid_to_delete(inode)) {
Mark Fashehb06970532006-03-03 10:24:33 -0800812 mlog(0, "Skipping delete of %llu because flags changed\n",
813 (unsigned long long)oi->ip_blkno);
Mark Fashehccd979b2005-12-15 14:31:24 -0800814 goto bail;
815 }
816
817 /* Now that we have an up to date inode, we can double check
818 * the link count. */
819 if (inode->i_nlink) {
Mark Fashehb06970532006-03-03 10:24:33 -0800820 mlog(0, "Skipping delete of %llu because nlink = %u\n",
821 (unsigned long long)oi->ip_blkno, inode->i_nlink);
Mark Fashehccd979b2005-12-15 14:31:24 -0800822 goto bail;
823 }
824
825 /* Do some basic inode verification... */
826 di = (struct ocfs2_dinode *) di_bh->b_data;
827 if (!(di->i_flags & cpu_to_le32(OCFS2_ORPHANED_FL))) {
828 /* for lack of a better error? */
829 status = -EEXIST;
830 mlog(ML_ERROR,
Mark Fashehb06970532006-03-03 10:24:33 -0800831 "Inode %llu (on-disk %llu) not orphaned! "
Mark Fashehccd979b2005-12-15 14:31:24 -0800832 "Disk flags 0x%x, inode flags 0x%x\n",
Mark Fashehb06970532006-03-03 10:24:33 -0800833 (unsigned long long)oi->ip_blkno,
Mark Fasheh1ca1a112007-04-27 16:01:25 -0700834 (unsigned long long)le64_to_cpu(di->i_blkno),
835 le32_to_cpu(di->i_flags), oi->ip_flags);
Mark Fashehccd979b2005-12-15 14:31:24 -0800836 goto bail;
837 }
838
839 /* has someone already deleted us?! baaad... */
840 if (di->i_dtime) {
841 status = -EEXIST;
842 mlog_errno(status);
843 goto bail;
844 }
845
Mark Fasheh6f16bf62007-03-20 17:17:54 -0700846 /*
847 * This is how ocfs2 determines whether an inode is still live
848 * within the cluster. Every node takes a shared read lock on
849 * the inode open lock in ocfs2_read_locked_inode(). When we
850 * get to ->delete_inode(), each node tries to convert it's
851 * lock to an exclusive. Trylocks are serialized by the inode
852 * meta data lock. If the upconvert suceeds, we know the inode
853 * is no longer live and can be deleted.
854 *
855 * Though we call this with the meta data lock held, the
856 * trylock keeps us from ABBA deadlock.
857 */
858 status = ocfs2_try_open_lock(inode, 1);
Tiger Yang50008632007-03-20 16:01:38 -0700859 if (status == -EAGAIN) {
Mark Fashehccd979b2005-12-15 14:31:24 -0800860 status = 0;
Mark Fashehb06970532006-03-03 10:24:33 -0800861 mlog(0, "Skipping delete of %llu because it is in use on"
862 "other nodes\n", (unsigned long long)oi->ip_blkno);
Mark Fashehccd979b2005-12-15 14:31:24 -0800863 goto bail;
864 }
865 if (status < 0) {
866 mlog_errno(status);
867 goto bail;
868 }
869
Tiger Yang50008632007-03-20 16:01:38 -0700870 *wipe = 1;
871 mlog(0, "Inode %llu is ok to wipe from orphan dir %u\n",
872 (unsigned long long)oi->ip_blkno,
873 le16_to_cpu(di->i_orphaned_slot));
Mark Fashehccd979b2005-12-15 14:31:24 -0800874
875bail:
876 return status;
877}
878
879/* Support function for ocfs2_delete_inode. Will help us keep the
880 * inode data in a consistent state for clear_inode. Always truncates
881 * pages, optionally sync's them first. */
882static void ocfs2_cleanup_delete_inode(struct inode *inode,
883 int sync_data)
884{
Mark Fashehb06970532006-03-03 10:24:33 -0800885 mlog(0, "Cleanup inode %llu, sync = %d\n",
886 (unsigned long long)OCFS2_I(inode)->ip_blkno, sync_data);
Mark Fashehccd979b2005-12-15 14:31:24 -0800887 if (sync_data)
888 write_inode_now(inode, 1);
889 truncate_inode_pages(&inode->i_data, 0);
890}
891
892void ocfs2_delete_inode(struct inode *inode)
893{
894 int wipe, status;
895 sigset_t blocked, oldset;
896 struct buffer_head *di_bh = NULL;
897
898 mlog_entry("(inode->i_ino = %lu)\n", inode->i_ino);
899
900 if (is_bad_inode(inode)) {
901 mlog(0, "Skipping delete of bad inode\n");
902 goto bail;
903 }
904
905 if (!ocfs2_inode_is_valid_to_delete(inode)) {
906 /* It's probably not necessary to truncate_inode_pages
907 * here but we do it for safety anyway (it will most
908 * likely be a no-op anyway) */
909 ocfs2_cleanup_delete_inode(inode, 0);
910 goto bail;
911 }
912
913 /* We want to block signals in delete_inode as the lock and
914 * messaging paths may return us -ERESTARTSYS. Which would
915 * cause us to exit early, resulting in inodes being orphaned
916 * forever. */
917 sigfillset(&blocked);
918 status = sigprocmask(SIG_BLOCK, &blocked, &oldset);
919 if (status < 0) {
920 mlog_errno(status);
921 ocfs2_cleanup_delete_inode(inode, 1);
922 goto bail;
923 }
924
925 /* Lock down the inode. This gives us an up to date view of
926 * it's metadata (for verification), and allows us to
927 * serialize delete_inode votes.
928 *
929 * Even though we might be doing a truncate, we don't take the
930 * allocation lock here as it won't be needed - nobody will
931 * have the file open.
932 */
Mark Fasheh4bcec182006-10-09 16:02:40 -0700933 status = ocfs2_meta_lock(inode, &di_bh, 1);
Mark Fashehccd979b2005-12-15 14:31:24 -0800934 if (status < 0) {
935 if (status != -ENOENT)
936 mlog_errno(status);
937 ocfs2_cleanup_delete_inode(inode, 0);
938 goto bail_unblock;
939 }
940
941 /* Query the cluster. This will be the final decision made
942 * before we go ahead and wipe the inode. */
943 status = ocfs2_query_inode_wipe(inode, di_bh, &wipe);
944 if (!wipe || status < 0) {
945 /* Error and inode busy vote both mean we won't be
946 * removing the inode, so they take almost the same
947 * path. */
948 if (status < 0)
949 mlog_errno(status);
950
951 /* Someone in the cluster has voted to not wipe this
952 * inode, or it was never completely orphaned. Write
953 * out the pages and exit now. */
954 ocfs2_cleanup_delete_inode(inode, 1);
955 goto bail_unlock_inode;
956 }
957
958 ocfs2_cleanup_delete_inode(inode, 0);
959
960 status = ocfs2_wipe_inode(inode, di_bh);
961 if (status < 0) {
Mark Fashehb4df6ed2006-02-22 17:35:08 -0800962 if (status != -EDEADLK)
963 mlog_errno(status);
Mark Fashehccd979b2005-12-15 14:31:24 -0800964 goto bail_unlock_inode;
965 }
966
Mark Fasheh24c19ef2006-09-22 17:28:19 -0700967 /*
968 * Mark the inode as successfully deleted.
969 *
970 * This is important for ocfs2_clear_inode() as it will check
971 * this flag and skip any checkpointing work
972 *
973 * ocfs2_stuff_meta_lvb() also uses this flag to invalidate
974 * the LVB for other nodes.
975 */
Mark Fashehccd979b2005-12-15 14:31:24 -0800976 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_DELETED;
977
978bail_unlock_inode:
979 ocfs2_meta_unlock(inode, 1);
980 brelse(di_bh);
981bail_unblock:
982 status = sigprocmask(SIG_SETMASK, &oldset, NULL);
983 if (status < 0)
984 mlog_errno(status);
985bail:
986 clear_inode(inode);
987 mlog_exit_void();
988}
989
990void ocfs2_clear_inode(struct inode *inode)
991{
992 int status;
993 struct ocfs2_inode_info *oi = OCFS2_I(inode);
994
995 mlog_entry_void();
996
997 if (!inode)
998 goto bail;
999
Mark Fashehb06970532006-03-03 10:24:33 -08001000 mlog(0, "Clearing inode: %llu, nlink = %u\n",
1001 (unsigned long long)OCFS2_I(inode)->ip_blkno, inode->i_nlink);
Mark Fashehccd979b2005-12-15 14:31:24 -08001002
1003 mlog_bug_on_msg(OCFS2_SB(inode->i_sb) == NULL,
1004 "Inode=%lu\n", inode->i_ino);
1005
Tiger Yang50008632007-03-20 16:01:38 -07001006 /* For remove delete_inode vote, we hold open lock before,
1007 * now it is time to unlock PR and EX open locks. */
1008 ocfs2_open_unlock(inode);
1009
Mark Fashehccd979b2005-12-15 14:31:24 -08001010 /* Do these before all the other work so that we don't bounce
1011 * the vote thread while waiting to destroy the locks. */
1012 ocfs2_mark_lockres_freeing(&oi->ip_rw_lockres);
1013 ocfs2_mark_lockres_freeing(&oi->ip_meta_lockres);
1014 ocfs2_mark_lockres_freeing(&oi->ip_data_lockres);
Tiger Yang50008632007-03-20 16:01:38 -07001015 ocfs2_mark_lockres_freeing(&oi->ip_open_lockres);
Mark Fashehccd979b2005-12-15 14:31:24 -08001016
1017 /* We very well may get a clear_inode before all an inodes
1018 * metadata has hit disk. Of course, we can't drop any cluster
1019 * locks until the journal has finished with it. The only
1020 * exception here are successfully wiped inodes - their
1021 * metadata can now be considered to be part of the system
1022 * inodes from which it came. */
1023 if (!(OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED))
1024 ocfs2_checkpoint_inode(inode);
1025
1026 mlog_bug_on_msg(!list_empty(&oi->ip_io_markers),
Mark Fashehb06970532006-03-03 10:24:33 -08001027 "Clear inode of %llu, inode has io markers\n",
1028 (unsigned long long)oi->ip_blkno);
Mark Fashehccd979b2005-12-15 14:31:24 -08001029
Mark Fasheh83418972007-04-23 18:53:12 -07001030 ocfs2_extent_map_trunc(inode, 0);
1031
Mark Fashehccd979b2005-12-15 14:31:24 -08001032 status = ocfs2_drop_inode_locks(inode);
1033 if (status < 0)
1034 mlog_errno(status);
1035
1036 ocfs2_lock_res_free(&oi->ip_rw_lockres);
1037 ocfs2_lock_res_free(&oi->ip_meta_lockres);
1038 ocfs2_lock_res_free(&oi->ip_data_lockres);
Tiger Yang50008632007-03-20 16:01:38 -07001039 ocfs2_lock_res_free(&oi->ip_open_lockres);
Mark Fashehccd979b2005-12-15 14:31:24 -08001040
1041 ocfs2_metadata_cache_purge(inode);
1042
1043 mlog_bug_on_msg(oi->ip_metadata_cache.ci_num_cached,
Mark Fashehb06970532006-03-03 10:24:33 -08001044 "Clear inode of %llu, inode has %u cache items\n",
1045 (unsigned long long)oi->ip_blkno, oi->ip_metadata_cache.ci_num_cached);
Mark Fashehccd979b2005-12-15 14:31:24 -08001046
1047 mlog_bug_on_msg(!(oi->ip_flags & OCFS2_INODE_CACHE_INLINE),
Mark Fashehb06970532006-03-03 10:24:33 -08001048 "Clear inode of %llu, inode has a bad flag\n",
1049 (unsigned long long)oi->ip_blkno);
Mark Fashehccd979b2005-12-15 14:31:24 -08001050
1051 mlog_bug_on_msg(spin_is_locked(&oi->ip_lock),
Mark Fashehb06970532006-03-03 10:24:33 -08001052 "Clear inode of %llu, inode is locked\n",
1053 (unsigned long long)oi->ip_blkno);
Mark Fashehccd979b2005-12-15 14:31:24 -08001054
Mark Fasheh251b6ec2006-01-10 15:41:43 -08001055 mlog_bug_on_msg(!mutex_trylock(&oi->ip_io_mutex),
Mark Fashehb06970532006-03-03 10:24:33 -08001056 "Clear inode of %llu, io_mutex is locked\n",
1057 (unsigned long long)oi->ip_blkno);
Mark Fasheh251b6ec2006-01-10 15:41:43 -08001058 mutex_unlock(&oi->ip_io_mutex);
Mark Fashehccd979b2005-12-15 14:31:24 -08001059
1060 /*
1061 * down_trylock() returns 0, down_write_trylock() returns 1
1062 * kernel 1, world 0
1063 */
1064 mlog_bug_on_msg(!down_write_trylock(&oi->ip_alloc_sem),
Mark Fashehb06970532006-03-03 10:24:33 -08001065 "Clear inode of %llu, alloc_sem is locked\n",
1066 (unsigned long long)oi->ip_blkno);
Mark Fashehccd979b2005-12-15 14:31:24 -08001067 up_write(&oi->ip_alloc_sem);
1068
1069 mlog_bug_on_msg(oi->ip_open_count,
Mark Fashehb06970532006-03-03 10:24:33 -08001070 "Clear inode of %llu has open count %d\n",
1071 (unsigned long long)oi->ip_blkno, oi->ip_open_count);
Mark Fashehccd979b2005-12-15 14:31:24 -08001072
1073 /* Clear all other flags. */
1074 oi->ip_flags = OCFS2_INODE_CACHE_INLINE;
1075 oi->ip_created_trans = 0;
1076 oi->ip_last_trans = 0;
1077 oi->ip_dir_start_lookup = 0;
1078 oi->ip_blkno = 0ULL;
1079
1080bail:
1081 mlog_exit_void();
1082}
1083
1084/* Called under inode_lock, with no more references on the
1085 * struct inode, so it's safe here to check the flags field
1086 * and to manipulate i_nlink without any other locks. */
1087void ocfs2_drop_inode(struct inode *inode)
1088{
1089 struct ocfs2_inode_info *oi = OCFS2_I(inode);
1090
1091 mlog_entry_void();
1092
Mark Fashehb06970532006-03-03 10:24:33 -08001093 mlog(0, "Drop inode %llu, nlink = %u, ip_flags = 0x%x\n",
1094 (unsigned long long)oi->ip_blkno, inode->i_nlink, oi->ip_flags);
Mark Fashehccd979b2005-12-15 14:31:24 -08001095
Mark Fasheh379dfe92006-09-08 14:21:03 -07001096 if (oi->ip_flags & OCFS2_INODE_MAYBE_ORPHANED)
1097 generic_delete_inode(inode);
1098 else
1099 generic_drop_inode(inode);
Mark Fashehccd979b2005-12-15 14:31:24 -08001100
1101 mlog_exit_void();
1102}
1103
1104/*
1105 * TODO: this should probably be merged into ocfs2_get_block
1106 *
1107 * However, you now need to pay attention to the cont_prepare_write()
1108 * stuff in ocfs2_get_block (that is, ocfs2_get_block pretty much
1109 * expects never to extend).
1110 */
1111struct buffer_head *ocfs2_bread(struct inode *inode,
1112 int block, int *err, int reada)
1113{
1114 struct buffer_head *bh = NULL;
1115 int tmperr;
1116 u64 p_blkno;
1117 int readflags = OCFS2_BH_CACHED;
1118
Mark Fashehccd979b2005-12-15 14:31:24 -08001119 if (reada)
1120 readflags |= OCFS2_BH_READAHEAD;
Mark Fashehccd979b2005-12-15 14:31:24 -08001121
1122 if (((u64)block << inode->i_sb->s_blocksize_bits) >=
1123 i_size_read(inode)) {
1124 BUG_ON(!reada);
1125 return NULL;
1126 }
1127
Joel Beckeree19a772007-03-28 18:27:07 -07001128 down_read(&OCFS2_I(inode)->ip_alloc_sem);
Mark Fasheh49cb8d22007-03-09 16:21:46 -08001129 tmperr = ocfs2_extent_map_get_blocks(inode, block, &p_blkno, NULL,
1130 NULL);
Joel Beckeree19a772007-03-28 18:27:07 -07001131 up_read(&OCFS2_I(inode)->ip_alloc_sem);
Mark Fashehccd979b2005-12-15 14:31:24 -08001132 if (tmperr < 0) {
1133 mlog_errno(tmperr);
1134 goto fail;
1135 }
1136
1137 tmperr = ocfs2_read_block(OCFS2_SB(inode->i_sb), p_blkno, &bh,
1138 readflags, inode);
1139 if (tmperr < 0)
1140 goto fail;
1141
1142 tmperr = 0;
1143
1144 *err = 0;
1145 return bh;
1146
1147fail:
1148 if (bh) {
1149 brelse(bh);
1150 bh = NULL;
1151 }
1152 *err = -EIO;
1153 return NULL;
1154}
1155
1156/*
1157 * This is called from our getattr.
1158 */
1159int ocfs2_inode_revalidate(struct dentry *dentry)
1160{
1161 struct inode *inode = dentry->d_inode;
1162 int status = 0;
1163
Mark Fashehb06970532006-03-03 10:24:33 -08001164 mlog_entry("(inode = 0x%p, ino = %llu)\n", inode,
1165 inode ? (unsigned long long)OCFS2_I(inode)->ip_blkno : 0ULL);
Mark Fashehccd979b2005-12-15 14:31:24 -08001166
1167 if (!inode) {
1168 mlog(0, "eep, no inode!\n");
1169 status = -ENOENT;
1170 goto bail;
1171 }
1172
1173 spin_lock(&OCFS2_I(inode)->ip_lock);
1174 if (OCFS2_I(inode)->ip_flags & OCFS2_INODE_DELETED) {
1175 spin_unlock(&OCFS2_I(inode)->ip_lock);
1176 mlog(0, "inode deleted!\n");
1177 status = -ENOENT;
1178 goto bail;
1179 }
1180 spin_unlock(&OCFS2_I(inode)->ip_lock);
1181
1182 /* Let ocfs2_meta_lock do the work of updating our struct
1183 * inode for us. */
Mark Fasheh4bcec182006-10-09 16:02:40 -07001184 status = ocfs2_meta_lock(inode, NULL, 0);
Mark Fashehccd979b2005-12-15 14:31:24 -08001185 if (status < 0) {
1186 if (status != -ENOENT)
1187 mlog_errno(status);
1188 goto bail;
1189 }
1190 ocfs2_meta_unlock(inode, 0);
1191bail:
1192 mlog_exit(status);
1193
1194 return status;
1195}
1196
1197/*
1198 * Updates a disk inode from a
1199 * struct inode.
1200 * Only takes ip_lock.
1201 */
Mark Fasheh1fabe142006-10-09 18:11:45 -07001202int ocfs2_mark_inode_dirty(handle_t *handle,
Mark Fashehccd979b2005-12-15 14:31:24 -08001203 struct inode *inode,
1204 struct buffer_head *bh)
1205{
1206 int status;
1207 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) bh->b_data;
1208
Mark Fashehb06970532006-03-03 10:24:33 -08001209 mlog_entry("(inode %llu)\n",
1210 (unsigned long long)OCFS2_I(inode)->ip_blkno);
Mark Fashehccd979b2005-12-15 14:31:24 -08001211
1212 status = ocfs2_journal_access(handle, inode, bh,
1213 OCFS2_JOURNAL_ACCESS_WRITE);
1214 if (status < 0) {
1215 mlog_errno(status);
1216 goto leave;
1217 }
1218
1219 spin_lock(&OCFS2_I(inode)->ip_lock);
1220 fe->i_clusters = cpu_to_le32(OCFS2_I(inode)->ip_clusters);
Jan Kara6e4b0d52007-04-27 11:08:01 -07001221 ocfs2_get_inode_flags(OCFS2_I(inode));
Herbert Poetzlca4d1472006-07-03 17:27:12 -07001222 fe->i_attr = cpu_to_le32(OCFS2_I(inode)->ip_attr);
Mark Fashehccd979b2005-12-15 14:31:24 -08001223 spin_unlock(&OCFS2_I(inode)->ip_lock);
1224
1225 fe->i_size = cpu_to_le64(i_size_read(inode));
1226 fe->i_links_count = cpu_to_le16(inode->i_nlink);
1227 fe->i_uid = cpu_to_le32(inode->i_uid);
1228 fe->i_gid = cpu_to_le32(inode->i_gid);
1229 fe->i_mode = cpu_to_le16(inode->i_mode);
1230 fe->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
1231 fe->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
1232 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
1233 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
1234 fe->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec);
1235 fe->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
1236
1237 status = ocfs2_journal_dirty(handle, bh);
1238 if (status < 0)
1239 mlog_errno(status);
1240
1241 status = 0;
1242leave:
1243
1244 mlog_exit(status);
1245 return status;
1246}
1247
1248/*
1249 *
1250 * Updates a struct inode from a disk inode.
1251 * does no i/o, only takes ip_lock.
1252 */
1253void ocfs2_refresh_inode(struct inode *inode,
1254 struct ocfs2_dinode *fe)
1255{
Mark Fashehccd979b2005-12-15 14:31:24 -08001256 spin_lock(&OCFS2_I(inode)->ip_lock);
1257
1258 OCFS2_I(inode)->ip_clusters = le32_to_cpu(fe->i_clusters);
Herbert Poetzlca4d1472006-07-03 17:27:12 -07001259 OCFS2_I(inode)->ip_attr = le32_to_cpu(fe->i_attr);
1260 ocfs2_set_inode_flags(inode);
Mark Fashehccd979b2005-12-15 14:31:24 -08001261 i_size_write(inode, le64_to_cpu(fe->i_size));
1262 inode->i_nlink = le16_to_cpu(fe->i_links_count);
1263 inode->i_uid = le32_to_cpu(fe->i_uid);
1264 inode->i_gid = le32_to_cpu(fe->i_gid);
1265 inode->i_mode = le16_to_cpu(fe->i_mode);
Mark Fashehccd979b2005-12-15 14:31:24 -08001266 if (S_ISLNK(inode->i_mode) && le32_to_cpu(fe->i_clusters) == 0)
1267 inode->i_blocks = 0;
1268 else
Mark Fasheh8110b072007-03-22 16:53:23 -07001269 inode->i_blocks = ocfs2_inode_sector_count(inode);
Mark Fashehccd979b2005-12-15 14:31:24 -08001270 inode->i_atime.tv_sec = le64_to_cpu(fe->i_atime);
1271 inode->i_atime.tv_nsec = le32_to_cpu(fe->i_atime_nsec);
1272 inode->i_mtime.tv_sec = le64_to_cpu(fe->i_mtime);
1273 inode->i_mtime.tv_nsec = le32_to_cpu(fe->i_mtime_nsec);
1274 inode->i_ctime.tv_sec = le64_to_cpu(fe->i_ctime);
1275 inode->i_ctime.tv_nsec = le32_to_cpu(fe->i_ctime_nsec);
1276
1277 spin_unlock(&OCFS2_I(inode)->ip_lock);
1278}