blob: 176fe6afd94eccf584c7ce8faa5556eee776457b [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 * namei.c
5 *
6 * Create and rename file, directory, symlinks
7 *
8 * Copyright (C) 2002, 2004 Oracle. All rights reserved.
9 *
10 * Portions of this code from linux/fs/ext3/dir.c
11 *
12 * Copyright (C) 1992, 1993, 1994, 1995
13 * Remy Card (card@masi.ibp.fr)
14 * Laboratoire MASI - Institut Blaise pascal
15 * Universite Pierre et Marie Curie (Paris VI)
16 *
17 * from
18 *
19 * linux/fs/minix/dir.c
20 *
21 * Copyright (C) 1991, 1992 Linux Torvalds
22 *
23 * This program is free software; you can redistribute it and/or
24 * modify it under the terms of the GNU General Public
25 * License as published by the Free Software Foundation; either
26 * version 2 of the License, or (at your option) any later version.
27 *
28 * This program is distributed in the hope that it will be useful,
29 * but WITHOUT ANY WARRANTY; without even the implied warranty of
30 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
31 * General Public License for more details.
32 *
33 * You should have received a copy of the GNU General Public
34 * License along with this program; if not, write to the
35 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
36 * Boston, MA 021110-1307, USA.
37 */
38
39#include <linux/fs.h>
40#include <linux/types.h>
41#include <linux/slab.h>
42#include <linux/highmem.h>
Jan Karaa90714c2008-10-09 19:38:40 +020043#include <linux/quotaops.h>
Mark Fashehccd979b2005-12-15 14:31:24 -080044
Mark Fashehccd979b2005-12-15 14:31:24 -080045#include <cluster/masklog.h>
46
47#include "ocfs2.h"
48
49#include "alloc.h"
50#include "dcache.h"
51#include "dir.h"
52#include "dlmglue.h"
53#include "extent_map.h"
54#include "file.h"
55#include "inode.h"
56#include "journal.h"
57#include "namei.h"
58#include "suballoc.h"
Mark Fashehaa958872006-04-21 13:49:02 -070059#include "super.h"
Mark Fashehccd979b2005-12-15 14:31:24 -080060#include "symlink.h"
61#include "sysfile.h"
62#include "uptodate.h"
Tiger Yangcf1d6c72008-08-18 17:11:00 +080063#include "xattr.h"
Tiger Yang89c38bd2008-11-14 11:17:41 +080064#include "acl.h"
Tao Ma8990e442011-02-23 22:45:26 +080065#include "ocfs2_trace.h"
Mark Fashehccd979b2005-12-15 14:31:24 -080066
67#include "buffer_head_io.h"
68
Mark Fashehccd979b2005-12-15 14:31:24 -080069static int ocfs2_mknod_locked(struct ocfs2_super *osb,
70 struct inode *dir,
Tiger Yangf5d36202008-11-14 11:15:44 +080071 struct inode *inode,
Mark Fashehccd979b2005-12-15 14:31:24 -080072 dev_t dev,
73 struct buffer_head **new_fe_bh,
74 struct buffer_head *parent_fe_bh,
Mark Fasheh1fabe142006-10-09 18:11:45 -070075 handle_t *handle,
Mark Fashehccd979b2005-12-15 14:31:24 -080076 struct ocfs2_alloc_context *inode_ac);
77
Mark Fashehccd979b2005-12-15 14:31:24 -080078static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
Mark Fasheh5098c272006-10-05 18:12:57 -070079 struct inode **ret_orphan_dir,
Tao Ma19bd3412009-08-18 11:44:10 +080080 u64 blkno,
Mark Fashehccd979b2005-12-15 14:31:24 -080081 char *name,
Joseph Qi06ee5c72015-02-16 15:59:54 -080082 struct ocfs2_dir_lookup_result *lookup,
83 bool dio);
Mark Fashehccd979b2005-12-15 14:31:24 -080084
85static int ocfs2_orphan_add(struct ocfs2_super *osb,
Mark Fasheh1fabe142006-10-09 18:11:45 -070086 handle_t *handle,
Mark Fashehccd979b2005-12-15 14:31:24 -080087 struct inode *inode,
Tristan Ye3939fda2010-03-19 09:21:09 +080088 struct buffer_head *fe_bh,
Mark Fashehccd979b2005-12-15 14:31:24 -080089 char *name,
Mark Fasheh4a12ca32008-11-12 15:43:34 -080090 struct ocfs2_dir_lookup_result *lookup,
Joseph Qi06ee5c72015-02-16 15:59:54 -080091 struct inode *orphan_dir_inode,
92 bool dio);
Mark Fashehccd979b2005-12-15 14:31:24 -080093
94static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
Mark Fasheh1fabe142006-10-09 18:11:45 -070095 handle_t *handle,
Mark Fashehccd979b2005-12-15 14:31:24 -080096 struct inode *inode,
97 const char *symname);
98
Xue jiufei53dc20b2015-01-08 14:32:23 -080099static int ocfs2_double_lock(struct ocfs2_super *osb,
100 struct buffer_head **bh1,
101 struct inode *inode1,
102 struct buffer_head **bh2,
103 struct inode *inode2,
104 int rename);
105
106static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2);
Mark Fashehccd979b2005-12-15 14:31:24 -0800107/* An orphan dir name is an 8 byte value, printed as a hex string */
108#define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64)))
Joseph Qi06ee5c72015-02-16 15:59:54 -0800109#define OCFS2_DIO_ORPHAN_PREFIX "dio-"
110#define OCFS2_DIO_ORPHAN_PREFIX_LEN 4
Mark Fashehccd979b2005-12-15 14:31:24 -0800111
112static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry,
Al Viro00cd8dd2012-06-10 17:13:09 -0400113 unsigned int flags)
Mark Fashehccd979b2005-12-15 14:31:24 -0800114{
115 int status;
116 u64 blkno;
Mark Fashehccd979b2005-12-15 14:31:24 -0800117 struct inode *inode = NULL;
118 struct dentry *ret;
Mark Fashehccd979b2005-12-15 14:31:24 -0800119 struct ocfs2_inode_info *oi;
120
Tao Ma8990e442011-02-23 22:45:26 +0800121 trace_ocfs2_lookup(dir, dentry, dentry->d_name.len,
122 dentry->d_name.name,
123 (unsigned long long)OCFS2_I(dir)->ip_blkno, 0);
Mark Fashehccd979b2005-12-15 14:31:24 -0800124
125 if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) {
126 ret = ERR_PTR(-ENAMETOOLONG);
127 goto bail;
128 }
129
Jan Karacb257972009-06-04 15:26:50 +0200130 status = ocfs2_inode_lock_nested(dir, NULL, 0, OI_LS_PARENT);
Mark Fashehccd979b2005-12-15 14:31:24 -0800131 if (status < 0) {
132 if (status != -ENOENT)
133 mlog_errno(status);
134 ret = ERR_PTR(status);
135 goto bail;
136 }
137
Mark Fashehbe94d112007-09-11 15:22:06 -0700138 status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name,
139 dentry->d_name.len, &blkno);
Mark Fashehccd979b2005-12-15 14:31:24 -0800140 if (status < 0)
141 goto bail_add;
142
Jan Kara5fa06132008-01-11 00:11:45 +0100143 inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0);
Mark Fashehccd979b2005-12-15 14:31:24 -0800144 if (IS_ERR(inode)) {
Mark Fashehccd979b2005-12-15 14:31:24 -0800145 ret = ERR_PTR(-EACCES);
146 goto bail_unlock;
147 }
148
149 oi = OCFS2_I(inode);
150 /* Clear any orphaned state... If we were able to look up the
151 * inode from a directory, it certainly can't be orphaned. We
152 * might have the bad state from a node which intended to
153 * orphan this inode but crashed before it could commit the
154 * unlink. */
155 spin_lock(&oi->ip_lock);
156 oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED;
Mark Fashehccd979b2005-12-15 14:31:24 -0800157 spin_unlock(&oi->ip_lock);
158
159bail_add:
Mark Fashehccd979b2005-12-15 14:31:24 -0800160 ret = d_splice_alias(inode, dentry);
161
Mark Fasheh379dfe92006-09-08 14:21:03 -0700162 if (inode) {
163 /*
164 * If d_splice_alias() finds a DCACHE_DISCONNECTED
165 * dentry, it will d_move() it on top of ourse. The
166 * return value will indicate this however, so in
167 * those cases, we switch them around for the locking
168 * code.
169 *
170 * NOTE: This dentry already has ->d_op set from
171 * ocfs2_get_parent() and ocfs2_get_dentry()
172 */
Richard Weinbergerd3556ba2014-10-29 14:50:53 -0700173 if (!IS_ERR_OR_NULL(ret))
Mark Fasheh379dfe92006-09-08 14:21:03 -0700174 dentry = ret;
175
176 status = ocfs2_dentry_attach_lock(dentry, inode,
Mark Fasheh0027dd52006-09-21 16:51:28 -0700177 OCFS2_I(dir)->ip_blkno);
Mark Fasheh379dfe92006-09-08 14:21:03 -0700178 if (status) {
179 mlog_errno(status);
180 ret = ERR_PTR(status);
181 goto bail_unlock;
182 }
Goldwyn Rodrigues5e98d492010-06-28 10:04:32 -0500183 } else
184 ocfs2_dentry_attach_gen(dentry);
Mark Fasheh379dfe92006-09-08 14:21:03 -0700185
Mark Fashehccd979b2005-12-15 14:31:24 -0800186bail_unlock:
187 /* Don't drop the cluster lock until *after* the d_add --
188 * unlink on another node will message us to remove that
189 * dentry under this lock so otherwise we can race this with
Mark Fasheh34d024f2007-09-24 15:56:19 -0700190 * the downconvert thread and have a stale dentry. */
Mark Fashehe63aecb62007-10-18 15:30:42 -0700191 ocfs2_inode_unlock(dir, 0);
Mark Fashehccd979b2005-12-15 14:31:24 -0800192
193bail:
Mark Fashehccd979b2005-12-15 14:31:24 -0800194
Tao Ma8990e442011-02-23 22:45:26 +0800195 trace_ocfs2_lookup_ret(ret);
Mark Fashehccd979b2005-12-15 14:31:24 -0800196
197 return ret;
198}
199
Al Viro67697cb2011-07-26 02:55:32 -0400200static struct inode *ocfs2_get_init_inode(struct inode *dir, umode_t mode)
Tiger Yangf5d36202008-11-14 11:15:44 +0800201{
202 struct inode *inode;
203
204 inode = new_inode(dir->i_sb);
205 if (!inode) {
206 mlog(ML_ERROR, "new_inode failed!\n");
207 return NULL;
208 }
209
210 /* populate as many fields early on as possible - many of
211 * these are used by the support functions here and in
212 * callers. */
213 if (S_ISDIR(mode))
Miklos Szeredibfe86842011-10-28 14:13:29 +0200214 set_nlink(inode, 2);
Dmitry Monakhov75fe0a22010-03-04 17:32:16 +0300215 inode_init_owner(inode, dir, mode);
Christoph Hellwig871a2932010-03-03 09:05:07 -0500216 dquot_initialize(inode);
Tiger Yangf5d36202008-11-14 11:15:44 +0800217 return inode;
218}
219
jiangyiwen595297a2014-06-23 13:22:09 -0700220static void ocfs2_cleanup_add_entry_failure(struct ocfs2_super *osb,
221 struct dentry *dentry, struct inode *inode)
222{
223 struct ocfs2_dentry_lock *dl = dentry->d_fsdata;
224
225 ocfs2_simple_drop_lockres(osb, &dl->dl_lockres);
226 ocfs2_lock_res_free(&dl->dl_lockres);
227 BUG_ON(dl->dl_count != 1);
228 spin_lock(&dentry_attach_lock);
229 dentry->d_fsdata = NULL;
230 spin_unlock(&dentry_attach_lock);
231 kfree(dl);
232 iput(inode);
233}
234
Mark Fashehccd979b2005-12-15 14:31:24 -0800235static int ocfs2_mknod(struct inode *dir,
236 struct dentry *dentry,
Al Viro1a67aaf2011-07-26 01:52:52 -0400237 umode_t mode,
Mark Fashehccd979b2005-12-15 14:31:24 -0800238 dev_t dev)
239{
240 int status = 0;
241 struct buffer_head *parent_fe_bh = NULL;
Mark Fasheh1fabe142006-10-09 18:11:45 -0700242 handle_t *handle = NULL;
Mark Fashehccd979b2005-12-15 14:31:24 -0800243 struct ocfs2_super *osb;
244 struct ocfs2_dinode *dirfe;
245 struct buffer_head *new_fe_bh = NULL;
Mark Fashehccd979b2005-12-15 14:31:24 -0800246 struct inode *inode = NULL;
247 struct ocfs2_alloc_context *inode_ac = NULL;
248 struct ocfs2_alloc_context *data_ac = NULL;
Mark Fasheh9b7895e2008-11-12 16:27:44 -0800249 struct ocfs2_alloc_context *meta_ac = NULL;
Tiger Yang534eadd2008-11-14 11:16:41 +0800250 int want_clusters = 0;
Mark Fasheh9b7895e2008-11-12 16:27:44 -0800251 int want_meta = 0;
Tiger Yang534eadd2008-11-14 11:16:41 +0800252 int xattr_credits = 0;
253 struct ocfs2_security_xattr_info si = {
254 .enable = 1,
255 };
Jan Karaa90714c2008-10-09 19:38:40 +0200256 int did_quota_inode = 0;
Mark Fasheh4a12ca32008-11-12 15:43:34 -0800257 struct ocfs2_dir_lookup_result lookup = { NULL, };
Joel Becker547ba7c2010-05-10 11:56:52 -0700258 sigset_t oldset;
259 int did_block_signals = 0;
Christoph Hellwig702e5bc2013-12-20 05:16:48 -0800260 struct posix_acl *default_acl = NULL, *acl = NULL;
jiangyiwen595297a2014-06-23 13:22:09 -0700261 struct ocfs2_dentry_lock *dl = NULL;
Mark Fashehccd979b2005-12-15 14:31:24 -0800262
Tao Ma8990e442011-02-23 22:45:26 +0800263 trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name,
264 (unsigned long long)OCFS2_I(dir)->ip_blkno,
265 (unsigned long)dev, mode);
Mark Fashehccd979b2005-12-15 14:31:24 -0800266
Christoph Hellwig871a2932010-03-03 09:05:07 -0500267 dquot_initialize(dir);
Christoph Hellwig907f4552010-03-03 09:05:06 -0500268
Mark Fashehccd979b2005-12-15 14:31:24 -0800269 /* get our super block */
270 osb = OCFS2_SB(dir->i_sb);
271
Mark Fashehe63aecb62007-10-18 15:30:42 -0700272 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
Mark Fashehe3a82132006-10-05 16:04:17 -0700273 if (status < 0) {
274 if (status != -ENOENT)
275 mlog_errno(status);
276 return status;
277 }
278
Mark Fasheh198a1ca2008-11-20 17:54:57 -0800279 if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) {
Mark Fasheha663e302006-08-09 11:45:07 -0700280 status = -EMLINK;
281 goto leave;
282 }
283
Mark Fashehccd979b2005-12-15 14:31:24 -0800284 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
Mark Fasheh198a1ca2008-11-20 17:54:57 -0800285 if (!ocfs2_read_links_count(dirfe)) {
Mark Fashehccd979b2005-12-15 14:31:24 -0800286 /* can't make a file in a deleted directory. */
287 status = -ENOENT;
288 goto leave;
289 }
290
291 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
292 dentry->d_name.len);
293 if (status)
294 goto leave;
295
296 /* get a spot inside the dir. */
297 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
298 dentry->d_name.name,
Mark Fasheh4a12ca32008-11-12 15:43:34 -0800299 dentry->d_name.len, &lookup);
Mark Fashehccd979b2005-12-15 14:31:24 -0800300 if (status < 0) {
301 mlog_errno(status);
302 goto leave;
303 }
304
305 /* reserve an inode spot */
Mark Fashehda5cbf22006-10-06 18:34:35 -0700306 status = ocfs2_reserve_new_inode(osb, &inode_ac);
Mark Fashehccd979b2005-12-15 14:31:24 -0800307 if (status < 0) {
308 if (status != -ENOSPC)
309 mlog_errno(status);
310 goto leave;
311 }
312
Tiger Yangf5d36202008-11-14 11:15:44 +0800313 inode = ocfs2_get_init_inode(dir, mode);
314 if (!inode) {
315 status = -ENOMEM;
316 mlog_errno(status);
317 goto leave;
318 }
319
Tiger Yang534eadd2008-11-14 11:16:41 +0800320 /* get security xattr */
Eric Paris2a7dba32011-02-01 11:05:39 -0500321 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
Tiger Yang534eadd2008-11-14 11:16:41 +0800322 if (status) {
323 if (status == -EOPNOTSUPP)
324 si.enable = 0;
325 else {
326 mlog_errno(status);
Mark Fashehccd979b2005-12-15 14:31:24 -0800327 goto leave;
328 }
329 }
330
Tiger Yang89c38bd2008-11-14 11:17:41 +0800331 /* calculate meta data/clusters for setting security and acl xattr */
332 status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode,
Mark Fasheh9b7895e2008-11-12 16:27:44 -0800333 &si, &want_clusters,
334 &xattr_credits, &want_meta);
Tiger Yang89c38bd2008-11-14 11:17:41 +0800335 if (status < 0) {
336 mlog_errno(status);
337 goto leave;
Tiger Yang534eadd2008-11-14 11:16:41 +0800338 }
339
340 /* Reserve a cluster if creating an extent based directory. */
Mark Fasheh9b7895e2008-11-12 16:27:44 -0800341 if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) {
Tiger Yang534eadd2008-11-14 11:16:41 +0800342 want_clusters += 1;
343
Mark Fasheh9b7895e2008-11-12 16:27:44 -0800344 /* Dir indexing requires extra space as well */
Mark Fasheh4ed8a6b2008-11-24 17:02:08 -0800345 if (ocfs2_supports_indexed_dirs(osb))
Mark Fasheh9b7895e2008-11-12 16:27:44 -0800346 want_meta++;
Mark Fasheh9b7895e2008-11-12 16:27:44 -0800347 }
348
349 status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac);
350 if (status < 0) {
351 if (status != -ENOSPC)
352 mlog_errno(status);
353 goto leave;
354 }
355
Tiger Yang534eadd2008-11-14 11:16:41 +0800356 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
357 if (status < 0) {
358 if (status != -ENOSPC)
359 mlog_errno(status);
360 goto leave;
361 }
362
Christoph Hellwig702e5bc2013-12-20 05:16:48 -0800363 status = posix_acl_create(dir, &mode, &default_acl, &acl);
364 if (status) {
365 mlog_errno(status);
366 goto leave;
367 }
368
Mark Fasheh9b7895e2008-11-12 16:27:44 -0800369 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb,
370 S_ISDIR(mode),
371 xattr_credits));
Mark Fashehccd979b2005-12-15 14:31:24 -0800372 if (IS_ERR(handle)) {
373 status = PTR_ERR(handle);
374 handle = NULL;
375 mlog_errno(status);
376 goto leave;
377 }
378
Joel Becker547ba7c2010-05-10 11:56:52 -0700379 /* Starting to change things, restart is no longer possible. */
380 ocfs2_block_signals(&oldset);
381 did_block_signals = 1;
382
Christoph Hellwig63936dd2010-03-03 09:05:01 -0500383 status = dquot_alloc_inode(inode);
384 if (status)
Jan Karaa90714c2008-10-09 19:38:40 +0200385 goto leave;
Jan Karaa90714c2008-10-09 19:38:40 +0200386 did_quota_inode = 1;
387
Mark Fashehccd979b2005-12-15 14:31:24 -0800388 /* do the real work now. */
Tao Ma19bd3412009-08-18 11:44:10 +0800389 status = ocfs2_mknod_locked(osb, dir, inode, dev,
Mark Fashehccd979b2005-12-15 14:31:24 -0800390 &new_fe_bh, parent_fe_bh, handle,
Tiger Yangf5d36202008-11-14 11:15:44 +0800391 inode_ac);
Mark Fashehccd979b2005-12-15 14:31:24 -0800392 if (status < 0) {
393 mlog_errno(status);
394 goto leave;
395 }
396
397 if (S_ISDIR(mode)) {
398 status = ocfs2_fill_new_dir(osb, handle, dir, inode,
Mark Fasheh9b7895e2008-11-12 16:27:44 -0800399 new_fe_bh, data_ac, meta_ac);
Mark Fashehccd979b2005-12-15 14:31:24 -0800400 if (status < 0) {
401 mlog_errno(status);
402 goto leave;
403 }
404
Joel Becker0cf2f762009-02-12 16:41:25 -0800405 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir),
406 parent_fe_bh,
Joel Becker13723d02008-10-17 19:25:01 -0700407 OCFS2_JOURNAL_ACCESS_WRITE);
Mark Fashehccd979b2005-12-15 14:31:24 -0800408 if (status < 0) {
409 mlog_errno(status);
410 goto leave;
411 }
Mark Fasheh198a1ca2008-11-20 17:54:57 -0800412 ocfs2_add_links_count(dirfe, 1);
Joel Beckerec20cec2010-03-19 14:13:52 -0700413 ocfs2_journal_dirty(handle, parent_fe_bh);
Dave Hansend8c76e62006-09-30 23:29:04 -0700414 inc_nlink(dir);
Mark Fashehccd979b2005-12-15 14:31:24 -0800415 }
416
Christoph Hellwig702e5bc2013-12-20 05:16:48 -0800417 if (default_acl) {
418 status = ocfs2_set_acl(handle, inode, new_fe_bh,
419 ACL_TYPE_DEFAULT, default_acl,
420 meta_ac, data_ac);
421 }
422 if (!status && acl) {
423 status = ocfs2_set_acl(handle, inode, new_fe_bh,
424 ACL_TYPE_ACCESS, acl,
425 meta_ac, data_ac);
426 }
427
Tiger Yang89c38bd2008-11-14 11:17:41 +0800428 if (status < 0) {
429 mlog_errno(status);
430 goto leave;
431 }
432
Tiger Yang534eadd2008-11-14 11:16:41 +0800433 if (si.enable) {
434 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
Mark Fasheh9b7895e2008-11-12 16:27:44 -0800435 meta_ac, data_ac);
Tiger Yang534eadd2008-11-14 11:16:41 +0800436 if (status < 0) {
437 mlog_errno(status);
438 goto leave;
439 }
440 }
441
Mark Fasheha9743fc2010-04-23 11:42:22 -0700442 /*
443 * Do this before adding the entry to the directory. We add
444 * also set d_op after success so that ->d_iput() will cleanup
445 * the dentry lock even if ocfs2_add_entry() fails below.
446 */
447 status = ocfs2_dentry_attach_lock(dentry, inode,
448 OCFS2_I(dir)->ip_blkno);
449 if (status) {
450 mlog_errno(status);
451 goto leave;
452 }
Mark Fasheha9743fc2010-04-23 11:42:22 -0700453
jiangyiwen595297a2014-06-23 13:22:09 -0700454 dl = dentry->d_fsdata;
455
Mark Fashehccd979b2005-12-15 14:31:24 -0800456 status = ocfs2_add_entry(handle, dentry, inode,
457 OCFS2_I(inode)->ip_blkno, parent_fe_bh,
Mark Fasheh4a12ca32008-11-12 15:43:34 -0800458 &lookup);
Mark Fashehccd979b2005-12-15 14:31:24 -0800459 if (status < 0) {
460 mlog_errno(status);
461 goto leave;
462 }
463
464 insert_inode_hash(inode);
Mark Fashehccd979b2005-12-15 14:31:24 -0800465 d_instantiate(dentry, inode);
466 status = 0;
467leave:
Christoph Hellwig702e5bc2013-12-20 05:16:48 -0800468 if (default_acl)
469 posix_acl_release(default_acl);
470 if (acl)
471 posix_acl_release(acl);
Jan Karaa90714c2008-10-09 19:38:40 +0200472 if (status < 0 && did_quota_inode)
Christoph Hellwig63936dd2010-03-03 09:05:01 -0500473 dquot_free_inode(inode);
Mark Fashehccd979b2005-12-15 14:31:24 -0800474 if (handle)
Mark Fasheh02dc1af2006-10-09 16:48:10 -0700475 ocfs2_commit_trans(osb, handle);
Mark Fashehccd979b2005-12-15 14:31:24 -0800476
Mark Fashehe63aecb62007-10-18 15:30:42 -0700477 ocfs2_inode_unlock(dir, 1);
Joel Becker547ba7c2010-05-10 11:56:52 -0700478 if (did_block_signals)
479 ocfs2_unblock_signals(&oldset);
Mark Fashehe3a82132006-10-05 16:04:17 -0700480
Mark Fasheha81cb882008-10-07 14:25:16 -0700481 brelse(new_fe_bh);
Mark Fasheha81cb882008-10-07 14:25:16 -0700482 brelse(parent_fe_bh);
Tiger Yang534eadd2008-11-14 11:16:41 +0800483 kfree(si.value);
Mark Fashehccd979b2005-12-15 14:31:24 -0800484
Mark Fasheh4a12ca32008-11-12 15:43:34 -0800485 ocfs2_free_dir_lookup_result(&lookup);
486
Mark Fashehccd979b2005-12-15 14:31:24 -0800487 if (inode_ac)
488 ocfs2_free_alloc_context(inode_ac);
489
490 if (data_ac)
491 ocfs2_free_alloc_context(data_ac);
492
Mark Fasheh9b7895e2008-11-12 16:27:44 -0800493 if (meta_ac)
494 ocfs2_free_alloc_context(meta_ac);
Tiger Yang534eadd2008-11-14 11:16:41 +0800495
Li Dongyang062d3402010-04-22 16:11:29 +0800496 /*
497 * We should call iput after the i_mutex of the bitmap been
498 * unlocked in ocfs2_free_alloc_context, or the
499 * ocfs2_delete_inode will mutex_lock again.
500 */
501 if ((status < 0) && inode) {
jiangyiwen595297a2014-06-23 13:22:09 -0700502 if (dl)
503 ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
504
Li Dongyang062d3402010-04-22 16:11:29 +0800505 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
506 clear_nlink(inode);
507 iput(inode);
508 }
509
Tao Mac1e8d352011-03-07 16:43:21 +0800510 if (status)
511 mlog_errno(status);
Mark Fashehccd979b2005-12-15 14:31:24 -0800512
513 return status;
514}
515
Mark Fasheh021960c2010-08-13 15:15:15 -0700516static int __ocfs2_mknod_locked(struct inode *dir,
517 struct inode *inode,
518 dev_t dev,
519 struct buffer_head **new_fe_bh,
520 struct buffer_head *parent_fe_bh,
521 handle_t *handle,
522 struct ocfs2_alloc_context *inode_ac,
523 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit)
Mark Fashehccd979b2005-12-15 14:31:24 -0800524{
525 int status = 0;
Mark Fasheh021960c2010-08-13 15:15:15 -0700526 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
Mark Fashehccd979b2005-12-15 14:31:24 -0800527 struct ocfs2_dinode *fe = NULL;
528 struct ocfs2_extent_list *fel;
Mark Fasheh9b7895e2008-11-12 16:27:44 -0800529 u16 feat;
Darrick J. Wong2931cdc2014-04-03 14:46:48 -0700530 struct ocfs2_inode_info *oi = OCFS2_I(inode);
Mark Fashehccd979b2005-12-15 14:31:24 -0800531
Mark Fashehccd979b2005-12-15 14:31:24 -0800532 *new_fe_bh = NULL;
Mark Fashehccd979b2005-12-15 14:31:24 -0800533
Mark Fashehccd979b2005-12-15 14:31:24 -0800534 /* populate as many fields early on as possible - many of
535 * these are used by the support functions here and in
536 * callers. */
537 inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
538 OCFS2_I(inode)->ip_blkno = fe_blkno;
Mark Fashehccd979b2005-12-15 14:31:24 -0800539 spin_lock(&osb->osb_lock);
540 inode->i_generation = osb->s_next_generation++;
541 spin_unlock(&osb->osb_lock);
542
543 *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
544 if (!*new_fe_bh) {
Rui Xiang7391a292013-11-12 15:06:54 -0800545 status = -ENOMEM;
Mark Fashehccd979b2005-12-15 14:31:24 -0800546 mlog_errno(status);
547 goto leave;
548 }
Joel Becker8cb471e2009-02-10 20:00:41 -0800549 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh);
Mark Fashehccd979b2005-12-15 14:31:24 -0800550
Joel Becker0cf2f762009-02-12 16:41:25 -0800551 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
552 *new_fe_bh,
Joel Becker13723d02008-10-17 19:25:01 -0700553 OCFS2_JOURNAL_ACCESS_CREATE);
Mark Fashehccd979b2005-12-15 14:31:24 -0800554 if (status < 0) {
555 mlog_errno(status);
556 goto leave;
557 }
558
559 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
560 memset(fe, 0, osb->sb->s_blocksize);
561
562 fe->i_generation = cpu_to_le32(inode->i_generation);
563 fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
564 fe->i_blkno = cpu_to_le64(fe_blkno);
Joel Becker2b6cb572010-03-26 10:09:15 +0800565 fe->i_suballoc_loc = cpu_to_le64(suballoc_loc);
Mark Fashehccd979b2005-12-15 14:31:24 -0800566 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
Tao Ma4d0ddb22008-03-05 16:11:46 +0800567 fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
Eric W. Biederman2c034172013-01-31 17:27:11 -0800568 fe->i_uid = cpu_to_le32(i_uid_read(inode));
569 fe->i_gid = cpu_to_le32(i_gid_read(inode));
Tiger Yangf5d36202008-11-14 11:15:44 +0800570 fe->i_mode = cpu_to_le16(inode->i_mode);
571 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
Mark Fashehccd979b2005-12-15 14:31:24 -0800572 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
Mark Fasheh198a1ca2008-11-20 17:54:57 -0800573
574 ocfs2_set_links_count(fe, inode->i_nlink);
Mark Fashehccd979b2005-12-15 14:31:24 -0800575
576 fe->i_last_eb_blk = 0;
577 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
Joseph Qi13eb9882013-07-03 15:00:48 -0700578 fe->i_flags |= cpu_to_le32(OCFS2_VALID_FL);
Mark Fashehccd979b2005-12-15 14:31:24 -0800579 fe->i_atime = fe->i_ctime = fe->i_mtime =
580 cpu_to_le64(CURRENT_TIME.tv_sec);
581 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
582 cpu_to_le32(CURRENT_TIME.tv_nsec);
583 fe->i_dtime = 0;
584
Mark Fasheh5b6a3a22007-09-13 16:33:54 -0700585 /*
Mark Fasheh9b7895e2008-11-12 16:27:44 -0800586 * If supported, directories start with inline data. If inline
587 * isn't supported, but indexing is, we start them as indexed.
Mark Fasheh5b6a3a22007-09-13 16:33:54 -0700588 */
Mark Fasheh9b7895e2008-11-12 16:27:44 -0800589 feat = le16_to_cpu(fe->i_dyn_features);
Tiger Yangf5d36202008-11-14 11:15:44 +0800590 if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
Mark Fasheh5b6a3a22007-09-13 16:33:54 -0700591 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
592
Tiger Yangd9ae49d2009-03-05 11:06:15 +0800593 fe->id2.i_data.id_count = cpu_to_le16(
594 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
Mark Fasheh5b6a3a22007-09-13 16:33:54 -0700595 } else {
596 fel = &fe->id2.i_list;
597 fel->l_tree_depth = 0;
598 fel->l_next_free_rec = 0;
599 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
600 }
Mark Fashehccd979b2005-12-15 14:31:24 -0800601
Joel Beckerec20cec2010-03-19 14:13:52 -0700602 ocfs2_journal_dirty(handle, *new_fe_bh);
Mark Fashehccd979b2005-12-15 14:31:24 -0800603
Joel Beckerb657c952008-11-13 14:49:11 -0800604 ocfs2_populate_inode(inode, fe, 1);
Joel Becker0cf2f762009-02-12 16:41:25 -0800605 ocfs2_ci_set_new(osb, INODE_CACHE(inode));
Sunil Mushranc271c5c2006-12-05 17:56:35 -0800606 if (!ocfs2_mount_local(osb)) {
607 status = ocfs2_create_new_inode_locks(inode);
608 if (status < 0)
609 mlog_errno(status);
610 }
Mark Fashehccd979b2005-12-15 14:31:24 -0800611
Darrick J. Wong2931cdc2014-04-03 14:46:48 -0700612 oi->i_sync_tid = handle->h_transaction->t_tid;
613 oi->i_datasync_tid = handle->h_transaction->t_tid;
614
Mark Fashehccd979b2005-12-15 14:31:24 -0800615leave:
616 if (status < 0) {
617 if (*new_fe_bh) {
618 brelse(*new_fe_bh);
619 *new_fe_bh = NULL;
620 }
Mark Fashehccd979b2005-12-15 14:31:24 -0800621 }
622
Tao Mac1e8d352011-03-07 16:43:21 +0800623 if (status)
624 mlog_errno(status);
Mark Fashehccd979b2005-12-15 14:31:24 -0800625 return status;
626}
627
Mark Fasheh021960c2010-08-13 15:15:15 -0700628static int ocfs2_mknod_locked(struct ocfs2_super *osb,
629 struct inode *dir,
630 struct inode *inode,
631 dev_t dev,
632 struct buffer_head **new_fe_bh,
633 struct buffer_head *parent_fe_bh,
634 handle_t *handle,
635 struct ocfs2_alloc_context *inode_ac)
636{
637 int status = 0;
638 u64 suballoc_loc, fe_blkno = 0;
639 u16 suballoc_bit;
640
641 *new_fe_bh = NULL;
642
643 status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh,
644 inode_ac, &suballoc_loc,
645 &suballoc_bit, &fe_blkno);
646 if (status < 0) {
647 mlog_errno(status);
648 return status;
649 }
650
651 return __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh,
652 parent_fe_bh, handle, inode_ac,
653 fe_blkno, suballoc_loc, suballoc_bit);
654}
655
Mark Fashehccd979b2005-12-15 14:31:24 -0800656static int ocfs2_mkdir(struct inode *dir,
657 struct dentry *dentry,
Al Viro18bb1db2011-07-26 01:41:39 -0400658 umode_t mode)
Mark Fashehccd979b2005-12-15 14:31:24 -0800659{
660 int ret;
661
Tao Ma8990e442011-02-23 22:45:26 +0800662 trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name,
663 OCFS2_I(dir)->ip_blkno, mode);
Mark Fashehccd979b2005-12-15 14:31:24 -0800664 ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
Tao Mac1e8d352011-03-07 16:43:21 +0800665 if (ret)
666 mlog_errno(ret);
Mark Fashehccd979b2005-12-15 14:31:24 -0800667
668 return ret;
669}
670
671static int ocfs2_create(struct inode *dir,
672 struct dentry *dentry,
Al Viro4acdaf22011-07-26 01:42:34 -0400673 umode_t mode,
Al Viroebfc3b42012-06-10 18:05:36 -0400674 bool excl)
Mark Fashehccd979b2005-12-15 14:31:24 -0800675{
676 int ret;
677
Tao Ma8990e442011-02-23 22:45:26 +0800678 trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name,
679 (unsigned long long)OCFS2_I(dir)->ip_blkno, mode);
Mark Fashehccd979b2005-12-15 14:31:24 -0800680 ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
Tao Mac1e8d352011-03-07 16:43:21 +0800681 if (ret)
682 mlog_errno(ret);
Mark Fashehccd979b2005-12-15 14:31:24 -0800683
684 return ret;
685}
686
687static int ocfs2_link(struct dentry *old_dentry,
688 struct inode *dir,
689 struct dentry *dentry)
690{
Mark Fasheh1fabe142006-10-09 18:11:45 -0700691 handle_t *handle;
David Howells2b0143b2015-03-17 22:25:59 +0000692 struct inode *inode = d_inode(old_dentry);
693 struct inode *old_dir = d_inode(old_dentry->d_parent);
Mark Fashehccd979b2005-12-15 14:31:24 -0800694 int err;
695 struct buffer_head *fe_bh = NULL;
Xue jiufei53dc20b2015-01-08 14:32:23 -0800696 struct buffer_head *old_dir_bh = NULL;
Mark Fashehccd979b2005-12-15 14:31:24 -0800697 struct buffer_head *parent_fe_bh = NULL;
Mark Fashehccd979b2005-12-15 14:31:24 -0800698 struct ocfs2_dinode *fe = NULL;
699 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
Mark Fasheh4a12ca32008-11-12 15:43:34 -0800700 struct ocfs2_dir_lookup_result lookup = { NULL, };
Joel Becker547ba7c2010-05-10 11:56:52 -0700701 sigset_t oldset;
Xue jiufei0e048312014-02-10 14:25:54 -0800702 u64 old_de_ino;
Mark Fashehccd979b2005-12-15 14:31:24 -0800703
Tao Ma8990e442011-02-23 22:45:26 +0800704 trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno,
705 old_dentry->d_name.len, old_dentry->d_name.name,
706 dentry->d_name.len, dentry->d_name.name);
Mark Fashehccd979b2005-12-15 14:31:24 -0800707
Mark Fasheh123a9642006-10-05 16:48:23 -0700708 if (S_ISDIR(inode->i_mode))
709 return -EPERM;
Mark Fashehccd979b2005-12-15 14:31:24 -0800710
Christoph Hellwig871a2932010-03-03 09:05:07 -0500711 dquot_initialize(dir);
Christoph Hellwig907f4552010-03-03 09:05:06 -0500712
Xue jiufei53dc20b2015-01-08 14:32:23 -0800713 err = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
714 &parent_fe_bh, dir, 0);
Mark Fashehccd979b2005-12-15 14:31:24 -0800715 if (err < 0) {
716 if (err != -ENOENT)
717 mlog_errno(err);
Mark Fasheh123a9642006-10-05 16:48:23 -0700718 return err;
Mark Fashehccd979b2005-12-15 14:31:24 -0800719 }
720
Xue jiufei53dc20b2015-01-08 14:32:23 -0800721 /* make sure both dirs have bhs
722 * get an extra ref on old_dir_bh if old==new */
723 if (!parent_fe_bh) {
724 if (old_dir_bh) {
725 parent_fe_bh = old_dir_bh;
726 get_bh(parent_fe_bh);
727 } else {
728 mlog(ML_ERROR, "%s: no old_dir_bh!\n", osb->uuid_str);
729 err = -EIO;
730 goto out;
731 }
732 }
733
Tiger Yang0f62de22006-08-31 20:39:47 -0700734 if (!dir->i_nlink) {
735 err = -ENOENT;
Mark Fasheh123a9642006-10-05 16:48:23 -0700736 goto out;
Tiger Yang0f62de22006-08-31 20:39:47 -0700737 }
738
Xue jiufei53dc20b2015-01-08 14:32:23 -0800739 err = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
Xue jiufei0e048312014-02-10 14:25:54 -0800740 old_dentry->d_name.len, &old_de_ino);
741 if (err) {
742 err = -ENOENT;
743 goto out;
744 }
745
746 /*
747 * Check whether another node removed the source inode while we
748 * were in the vfs.
749 */
750 if (old_de_ino != OCFS2_I(inode)->ip_blkno) {
751 err = -ENOENT;
752 goto out;
753 }
754
Mark Fashehccd979b2005-12-15 14:31:24 -0800755 err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
756 dentry->d_name.len);
757 if (err)
Mark Fasheh123a9642006-10-05 16:48:23 -0700758 goto out;
Mark Fashehccd979b2005-12-15 14:31:24 -0800759
760 err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
761 dentry->d_name.name,
Mark Fasheh4a12ca32008-11-12 15:43:34 -0800762 dentry->d_name.len, &lookup);
Mark Fashehccd979b2005-12-15 14:31:24 -0800763 if (err < 0) {
764 mlog_errno(err);
Mark Fasheh123a9642006-10-05 16:48:23 -0700765 goto out;
Mark Fashehccd979b2005-12-15 14:31:24 -0800766 }
767
Mark Fashehe63aecb62007-10-18 15:30:42 -0700768 err = ocfs2_inode_lock(inode, &fe_bh, 1);
Mark Fashehccd979b2005-12-15 14:31:24 -0800769 if (err < 0) {
770 if (err != -ENOENT)
771 mlog_errno(err);
Mark Fasheh123a9642006-10-05 16:48:23 -0700772 goto out;
Mark Fashehccd979b2005-12-15 14:31:24 -0800773 }
774
775 fe = (struct ocfs2_dinode *) fe_bh->b_data;
Mark Fasheh198a1ca2008-11-20 17:54:57 -0800776 if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) {
Mark Fashehccd979b2005-12-15 14:31:24 -0800777 err = -EMLINK;
Mark Fasheh123a9642006-10-05 16:48:23 -0700778 goto out_unlock_inode;
Mark Fashehccd979b2005-12-15 14:31:24 -0800779 }
780
Jan Karaa90714c2008-10-09 19:38:40 +0200781 handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
Mark Fashehccd979b2005-12-15 14:31:24 -0800782 if (IS_ERR(handle)) {
783 err = PTR_ERR(handle);
784 handle = NULL;
785 mlog_errno(err);
Mark Fasheh123a9642006-10-05 16:48:23 -0700786 goto out_unlock_inode;
Mark Fashehccd979b2005-12-15 14:31:24 -0800787 }
788
Joel Becker547ba7c2010-05-10 11:56:52 -0700789 /* Starting to change things, restart is no longer possible. */
790 ocfs2_block_signals(&oldset);
791
Joel Becker0cf2f762009-02-12 16:41:25 -0800792 err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
Joel Becker13723d02008-10-17 19:25:01 -0700793 OCFS2_JOURNAL_ACCESS_WRITE);
Mark Fashehccd979b2005-12-15 14:31:24 -0800794 if (err < 0) {
795 mlog_errno(err);
Mark Fasheh123a9642006-10-05 16:48:23 -0700796 goto out_commit;
Mark Fashehccd979b2005-12-15 14:31:24 -0800797 }
798
Dave Hansend8c76e62006-09-30 23:29:04 -0700799 inc_nlink(inode);
Mark Fashehccd979b2005-12-15 14:31:24 -0800800 inode->i_ctime = CURRENT_TIME;
Mark Fasheh198a1ca2008-11-20 17:54:57 -0800801 ocfs2_set_links_count(fe, inode->i_nlink);
Mark Fashehccd979b2005-12-15 14:31:24 -0800802 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
803 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
Joel Beckerec20cec2010-03-19 14:13:52 -0700804 ocfs2_journal_dirty(handle, fe_bh);
Mark Fashehccd979b2005-12-15 14:31:24 -0800805
806 err = ocfs2_add_entry(handle, dentry, inode,
807 OCFS2_I(inode)->ip_blkno,
Mark Fasheh4a12ca32008-11-12 15:43:34 -0800808 parent_fe_bh, &lookup);
Mark Fashehccd979b2005-12-15 14:31:24 -0800809 if (err) {
Mark Fasheh198a1ca2008-11-20 17:54:57 -0800810 ocfs2_add_links_count(fe, -1);
Dave Hansen9a53c3a2006-09-30 23:29:03 -0700811 drop_nlink(inode);
Mark Fashehccd979b2005-12-15 14:31:24 -0800812 mlog_errno(err);
Mark Fasheh123a9642006-10-05 16:48:23 -0700813 goto out_commit;
Mark Fashehccd979b2005-12-15 14:31:24 -0800814 }
815
Mark Fasheh0027dd52006-09-21 16:51:28 -0700816 err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
Mark Fasheh379dfe92006-09-08 14:21:03 -0700817 if (err) {
818 mlog_errno(err);
Mark Fasheh123a9642006-10-05 16:48:23 -0700819 goto out_commit;
Mark Fasheh379dfe92006-09-08 14:21:03 -0700820 }
821
Al Viro7de9c6ee2010-10-23 11:11:40 -0400822 ihold(inode);
Mark Fashehccd979b2005-12-15 14:31:24 -0800823 d_instantiate(dentry, inode);
Mark Fasheh123a9642006-10-05 16:48:23 -0700824
825out_commit:
Mark Fasheh02dc1af2006-10-09 16:48:10 -0700826 ocfs2_commit_trans(osb, handle);
Joel Becker547ba7c2010-05-10 11:56:52 -0700827 ocfs2_unblock_signals(&oldset);
Mark Fasheh123a9642006-10-05 16:48:23 -0700828out_unlock_inode:
Mark Fashehe63aecb62007-10-18 15:30:42 -0700829 ocfs2_inode_unlock(inode, 1);
Mark Fasheh123a9642006-10-05 16:48:23 -0700830
831out:
Xue jiufei53dc20b2015-01-08 14:32:23 -0800832 ocfs2_double_unlock(old_dir, dir);
Mark Fasheh123a9642006-10-05 16:48:23 -0700833
Mark Fasheha81cb882008-10-07 14:25:16 -0700834 brelse(fe_bh);
835 brelse(parent_fe_bh);
Xue jiufei53dc20b2015-01-08 14:32:23 -0800836 brelse(old_dir_bh);
Mark Fashehccd979b2005-12-15 14:31:24 -0800837
Mark Fasheh4a12ca32008-11-12 15:43:34 -0800838 ocfs2_free_dir_lookup_result(&lookup);
839
Tao Mac1e8d352011-03-07 16:43:21 +0800840 if (err)
841 mlog_errno(err);
Mark Fashehccd979b2005-12-15 14:31:24 -0800842
843 return err;
844}
845
Mark Fasheh379dfe92006-09-08 14:21:03 -0700846/*
847 * Takes and drops an exclusive lock on the given dentry. This will
848 * force other nodes to drop it.
849 */
850static int ocfs2_remote_dentry_delete(struct dentry *dentry)
851{
852 int ret;
853
854 ret = ocfs2_dentry_lock(dentry, 1);
855 if (ret)
856 mlog_errno(ret);
857 else
858 ocfs2_dentry_unlock(dentry, 1);
859
860 return ret;
861}
862
Younger Liub5a8bb72013-07-03 15:01:01 -0700863static inline int ocfs2_inode_is_unlinkable(struct inode *inode)
Mark Fasheh17ff7852006-09-30 23:29:05 -0700864{
865 if (S_ISDIR(inode->i_mode)) {
866 if (inode->i_nlink == 2)
867 return 1;
868 return 0;
869 }
870
871 if (inode->i_nlink == 1)
872 return 1;
873 return 0;
874}
875
Mark Fashehccd979b2005-12-15 14:31:24 -0800876static int ocfs2_unlink(struct inode *dir,
877 struct dentry *dentry)
878{
879 int status;
Mark Fasheh30a4f5e2006-10-06 11:49:45 -0700880 int child_locked = 0;
Younger Liub5a8bb72013-07-03 15:01:01 -0700881 bool is_unlinkable = false;
David Howells2b0143b2015-03-17 22:25:59 +0000882 struct inode *inode = d_inode(dentry);
Mark Fasheh5098c272006-10-05 18:12:57 -0700883 struct inode *orphan_dir = NULL;
Mark Fashehccd979b2005-12-15 14:31:24 -0800884 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
885 u64 blkno;
886 struct ocfs2_dinode *fe = NULL;
887 struct buffer_head *fe_bh = NULL;
888 struct buffer_head *parent_node_bh = NULL;
Mark Fasheh1fabe142006-10-09 18:11:45 -0700889 handle_t *handle = NULL;
Mark Fashehccd979b2005-12-15 14:31:24 -0800890 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
Mark Fasheh4a12ca32008-11-12 15:43:34 -0800891 struct ocfs2_dir_lookup_result lookup = { NULL, };
892 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
Mark Fashehccd979b2005-12-15 14:31:24 -0800893
Tao Ma8990e442011-02-23 22:45:26 +0800894 trace_ocfs2_unlink(dir, dentry, dentry->d_name.len,
895 dentry->d_name.name,
896 (unsigned long long)OCFS2_I(dir)->ip_blkno,
897 (unsigned long long)OCFS2_I(inode)->ip_blkno);
Mark Fashehccd979b2005-12-15 14:31:24 -0800898
Christoph Hellwig871a2932010-03-03 09:05:07 -0500899 dquot_initialize(dir);
Christoph Hellwig907f4552010-03-03 09:05:06 -0500900
David Howells2b0143b2015-03-17 22:25:59 +0000901 BUG_ON(d_inode(dentry->d_parent) != dir);
Mark Fashehccd979b2005-12-15 14:31:24 -0800902
Tao Ma8990e442011-02-23 22:45:26 +0800903 if (inode == osb->root_inode)
Mark Fasheh30a4f5e2006-10-06 11:49:45 -0700904 return -EPERM;
Mark Fashehccd979b2005-12-15 14:31:24 -0800905
Jan Karacb257972009-06-04 15:26:50 +0200906 status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
907 OI_LS_PARENT);
Mark Fashehccd979b2005-12-15 14:31:24 -0800908 if (status < 0) {
909 if (status != -ENOENT)
910 mlog_errno(status);
Mark Fasheh30a4f5e2006-10-06 11:49:45 -0700911 return status;
Mark Fashehccd979b2005-12-15 14:31:24 -0800912 }
913
914 status = ocfs2_find_files_on_disk(dentry->d_name.name,
Mark Fasheh4a12ca32008-11-12 15:43:34 -0800915 dentry->d_name.len, &blkno, dir,
916 &lookup);
Mark Fashehccd979b2005-12-15 14:31:24 -0800917 if (status < 0) {
918 if (status != -ENOENT)
919 mlog_errno(status);
920 goto leave;
921 }
922
923 if (OCFS2_I(inode)->ip_blkno != blkno) {
924 status = -ENOENT;
925
Tao Ma8990e442011-02-23 22:45:26 +0800926 trace_ocfs2_unlink_noent(
927 (unsigned long long)OCFS2_I(inode)->ip_blkno,
928 (unsigned long long)blkno,
929 OCFS2_I(inode)->ip_flags);
Mark Fashehccd979b2005-12-15 14:31:24 -0800930 goto leave;
931 }
932
Mark Fashehe63aecb62007-10-18 15:30:42 -0700933 status = ocfs2_inode_lock(inode, &fe_bh, 1);
Mark Fashehccd979b2005-12-15 14:31:24 -0800934 if (status < 0) {
935 if (status != -ENOENT)
936 mlog_errno(status);
937 goto leave;
938 }
Mark Fasheh30a4f5e2006-10-06 11:49:45 -0700939 child_locked = 1;
Mark Fashehccd979b2005-12-15 14:31:24 -0800940
941 if (S_ISDIR(inode->i_mode)) {
Mark Fashehb80b5492009-02-18 11:41:38 -0800942 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
Mark Fashehccd979b2005-12-15 14:31:24 -0800943 status = -ENOTEMPTY;
944 goto leave;
945 }
946 }
947
Mark Fasheh379dfe92006-09-08 14:21:03 -0700948 status = ocfs2_remote_dentry_delete(dentry);
Mark Fashehccd979b2005-12-15 14:31:24 -0800949 if (status < 0) {
Mark Fasheh34d024f2007-09-24 15:56:19 -0700950 /* This remote delete should succeed under all normal
Mark Fashehccd979b2005-12-15 14:31:24 -0800951 * circumstances. */
952 mlog_errno(status);
953 goto leave;
954 }
955
Younger Liub5a8bb72013-07-03 15:01:01 -0700956 if (ocfs2_inode_is_unlinkable(inode)) {
Tao Ma19bd3412009-08-18 11:44:10 +0800957 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
958 OCFS2_I(inode)->ip_blkno,
Joseph Qi06ee5c72015-02-16 15:59:54 -0800959 orphan_name, &orphan_insert,
960 false);
Mark Fashehccd979b2005-12-15 14:31:24 -0800961 if (status < 0) {
962 mlog_errno(status);
963 goto leave;
964 }
Younger Liub5a8bb72013-07-03 15:01:01 -0700965 is_unlinkable = true;
Mark Fashehccd979b2005-12-15 14:31:24 -0800966 }
967
Jan Karaa90714c2008-10-09 19:38:40 +0200968 handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
Mark Fashehccd979b2005-12-15 14:31:24 -0800969 if (IS_ERR(handle)) {
970 status = PTR_ERR(handle);
971 handle = NULL;
972 mlog_errno(status);
973 goto leave;
974 }
975
Joel Becker0cf2f762009-02-12 16:41:25 -0800976 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
Joel Becker13723d02008-10-17 19:25:01 -0700977 OCFS2_JOURNAL_ACCESS_WRITE);
Mark Fashehccd979b2005-12-15 14:31:24 -0800978 if (status < 0) {
979 mlog_errno(status);
980 goto leave;
981 }
982
983 fe = (struct ocfs2_dinode *) fe_bh->b_data;
984
Mark Fashehccd979b2005-12-15 14:31:24 -0800985 /* delete the name from the parent dir */
Mark Fasheh4a12ca32008-11-12 15:43:34 -0800986 status = ocfs2_delete_entry(handle, dir, &lookup);
Mark Fashehccd979b2005-12-15 14:31:24 -0800987 if (status < 0) {
988 mlog_errno(status);
989 goto leave;
990 }
991
Mark Fasheh17ff7852006-09-30 23:29:05 -0700992 if (S_ISDIR(inode->i_mode))
993 drop_nlink(inode);
994 drop_nlink(inode);
Mark Fasheh198a1ca2008-11-20 17:54:57 -0800995 ocfs2_set_links_count(fe, inode->i_nlink);
Joel Beckerec20cec2010-03-19 14:13:52 -0700996 ocfs2_journal_dirty(handle, fe_bh);
Mark Fashehccd979b2005-12-15 14:31:24 -0800997
Mark Fasheh592282c2007-01-02 17:59:40 -0800998 dir->i_ctime = dir->i_mtime = CURRENT_TIME;
999 if (S_ISDIR(inode->i_mode))
Mark Fasheh17ff7852006-09-30 23:29:05 -07001000 drop_nlink(dir);
Mark Fasheh592282c2007-01-02 17:59:40 -08001001
1002 status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
1003 if (status < 0) {
1004 mlog_errno(status);
1005 if (S_ISDIR(inode->i_mode))
Dave Hansend8c76e62006-09-30 23:29:04 -07001006 inc_nlink(dir);
Younger Liub5a8bb72013-07-03 15:01:01 -07001007 goto leave;
1008 }
1009
1010 if (is_unlinkable) {
1011 status = ocfs2_orphan_add(osb, handle, inode, fe_bh,
Joseph Qi06ee5c72015-02-16 15:59:54 -08001012 orphan_name, &orphan_insert, orphan_dir, false);
Younger Liub5a8bb72013-07-03 15:01:01 -07001013 if (status < 0)
1014 mlog_errno(status);
Mark Fashehccd979b2005-12-15 14:31:24 -08001015 }
1016
1017leave:
Mark Fashehccd979b2005-12-15 14:31:24 -08001018 if (handle)
Mark Fasheh02dc1af2006-10-09 16:48:10 -07001019 ocfs2_commit_trans(osb, handle);
Mark Fashehccd979b2005-12-15 14:31:24 -08001020
Mark Fasheh30a4f5e2006-10-06 11:49:45 -07001021 if (child_locked)
Mark Fashehe63aecb62007-10-18 15:30:42 -07001022 ocfs2_inode_unlock(inode, 1);
Mark Fasheh30a4f5e2006-10-06 11:49:45 -07001023
Mark Fashehe63aecb62007-10-18 15:30:42 -07001024 ocfs2_inode_unlock(dir, 1);
Mark Fasheh30a4f5e2006-10-06 11:49:45 -07001025
Mark Fasheh5098c272006-10-05 18:12:57 -07001026 if (orphan_dir) {
1027 /* This was locked for us in ocfs2_prepare_orphan_dir() */
Mark Fashehe63aecb62007-10-18 15:30:42 -07001028 ocfs2_inode_unlock(orphan_dir, 1);
Mark Fasheh5098c272006-10-05 18:12:57 -07001029 mutex_unlock(&orphan_dir->i_mutex);
1030 iput(orphan_dir);
1031 }
1032
Mark Fasheha81cb882008-10-07 14:25:16 -07001033 brelse(fe_bh);
Mark Fasheha81cb882008-10-07 14:25:16 -07001034 brelse(parent_node_bh);
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001035
1036 ocfs2_free_dir_lookup_result(&orphan_insert);
1037 ocfs2_free_dir_lookup_result(&lookup);
Mark Fashehccd979b2005-12-15 14:31:24 -08001038
Xiaowei.Huf5b25852014-01-27 17:06:56 -08001039 if (status && (status != -ENOTEMPTY) && (status != -ENOENT))
Tao Mac1e8d352011-03-07 16:43:21 +08001040 mlog_errno(status);
Mark Fashehccd979b2005-12-15 14:31:24 -08001041
1042 return status;
1043}
1044
Yiwen Jiangf7a14f32014-06-23 13:22:09 -07001045static int ocfs2_check_if_ancestor(struct ocfs2_super *osb,
1046 u64 src_inode_no, u64 dest_inode_no)
1047{
1048 int ret = 0, i = 0;
1049 u64 parent_inode_no = 0;
1050 u64 child_inode_no = src_inode_no;
1051 struct inode *child_inode;
1052
1053#define MAX_LOOKUP_TIMES 32
1054 while (1) {
1055 child_inode = ocfs2_iget(osb, child_inode_no, 0, 0);
1056 if (IS_ERR(child_inode)) {
1057 ret = PTR_ERR(child_inode);
1058 break;
1059 }
1060
1061 ret = ocfs2_inode_lock(child_inode, NULL, 0);
1062 if (ret < 0) {
1063 iput(child_inode);
1064 if (ret != -ENOENT)
1065 mlog_errno(ret);
1066 break;
1067 }
1068
1069 ret = ocfs2_lookup_ino_from_name(child_inode, "..", 2,
1070 &parent_inode_no);
1071 ocfs2_inode_unlock(child_inode, 0);
1072 iput(child_inode);
1073 if (ret < 0) {
1074 ret = -ENOENT;
1075 break;
1076 }
1077
1078 if (parent_inode_no == dest_inode_no) {
1079 ret = 1;
1080 break;
1081 }
1082
1083 if (parent_inode_no == osb->root_inode->i_ino) {
1084 ret = 0;
1085 break;
1086 }
1087
1088 child_inode_no = parent_inode_no;
1089
1090 if (++i >= MAX_LOOKUP_TIMES) {
1091 mlog(ML_NOTICE, "max lookup times reached, filesystem "
1092 "may have nested directories, "
1093 "src inode: %llu, dest inode: %llu.\n",
1094 (unsigned long long)src_inode_no,
1095 (unsigned long long)dest_inode_no);
1096 ret = 0;
1097 break;
1098 }
1099 }
1100
1101 return ret;
1102}
1103
Mark Fashehccd979b2005-12-15 14:31:24 -08001104/*
Xue jiufei53dc20b2015-01-08 14:32:23 -08001105 * The only place this should be used is rename and link!
Mark Fashehccd979b2005-12-15 14:31:24 -08001106 * if they have the same id, then the 1st one is the only one locked.
1107 */
1108static int ocfs2_double_lock(struct ocfs2_super *osb,
Mark Fashehccd979b2005-12-15 14:31:24 -08001109 struct buffer_head **bh1,
1110 struct inode *inode1,
1111 struct buffer_head **bh2,
Xue jiufei53dc20b2015-01-08 14:32:23 -08001112 struct inode *inode2,
1113 int rename)
Mark Fashehccd979b2005-12-15 14:31:24 -08001114{
1115 int status;
Yiwen Jiangf7a14f32014-06-23 13:22:09 -07001116 int inode1_is_ancestor, inode2_is_ancestor;
Mark Fashehccd979b2005-12-15 14:31:24 -08001117 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
1118 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
1119 struct buffer_head **tmpbh;
1120 struct inode *tmpinode;
1121
Tao Ma8990e442011-02-23 22:45:26 +08001122 trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno,
1123 (unsigned long long)oi2->ip_blkno);
Mark Fashehccd979b2005-12-15 14:31:24 -08001124
Mark Fashehccd979b2005-12-15 14:31:24 -08001125 if (*bh1)
1126 *bh1 = NULL;
1127 if (*bh2)
1128 *bh2 = NULL;
1129
Yiwen Jiangf7a14f32014-06-23 13:22:09 -07001130 /* we always want to lock the one with the lower lockid first.
1131 * and if they are nested, we lock ancestor first */
Mark Fashehccd979b2005-12-15 14:31:24 -08001132 if (oi1->ip_blkno != oi2->ip_blkno) {
Yiwen Jiangf7a14f32014-06-23 13:22:09 -07001133 inode1_is_ancestor = ocfs2_check_if_ancestor(osb, oi2->ip_blkno,
1134 oi1->ip_blkno);
1135 if (inode1_is_ancestor < 0) {
1136 status = inode1_is_ancestor;
1137 goto bail;
1138 }
1139
1140 inode2_is_ancestor = ocfs2_check_if_ancestor(osb, oi1->ip_blkno,
1141 oi2->ip_blkno);
1142 if (inode2_is_ancestor < 0) {
1143 status = inode2_is_ancestor;
1144 goto bail;
1145 }
1146
1147 if ((inode1_is_ancestor == 1) ||
1148 (oi1->ip_blkno < oi2->ip_blkno &&
1149 inode2_is_ancestor == 0)) {
Mark Fashehccd979b2005-12-15 14:31:24 -08001150 /* switch id1 and id2 around */
Mark Fashehccd979b2005-12-15 14:31:24 -08001151 tmpbh = bh2;
1152 bh2 = bh1;
1153 bh1 = tmpbh;
1154
1155 tmpinode = inode2;
1156 inode2 = inode1;
1157 inode1 = tmpinode;
1158 }
1159 /* lock id2 */
Jan Karacb257972009-06-04 15:26:50 +02001160 status = ocfs2_inode_lock_nested(inode2, bh2, 1,
Xue jiufei53dc20b2015-01-08 14:32:23 -08001161 rename == 1 ? OI_LS_RENAME1 : OI_LS_PARENT);
Mark Fashehccd979b2005-12-15 14:31:24 -08001162 if (status < 0) {
1163 if (status != -ENOENT)
1164 mlog_errno(status);
1165 goto bail;
1166 }
1167 }
Mark Fasheh8d5596c2006-10-06 15:04:51 -07001168
Mark Fashehccd979b2005-12-15 14:31:24 -08001169 /* lock id1 */
Xue jiufei53dc20b2015-01-08 14:32:23 -08001170 status = ocfs2_inode_lock_nested(inode1, bh1, 1,
1171 rename == 1 ? OI_LS_RENAME2 : OI_LS_PARENT);
Mark Fashehccd979b2005-12-15 14:31:24 -08001172 if (status < 0) {
Mark Fasheh8d5596c2006-10-06 15:04:51 -07001173 /*
1174 * An error return must mean that no cluster locks
1175 * were held on function exit.
1176 */
Tao Ma1e6d9152010-12-20 16:21:11 +08001177 if (oi1->ip_blkno != oi2->ip_blkno) {
Mark Fashehe63aecb62007-10-18 15:30:42 -07001178 ocfs2_inode_unlock(inode2, 1);
Tao Ma1e6d9152010-12-20 16:21:11 +08001179 brelse(*bh2);
1180 *bh2 = NULL;
1181 }
Mark Fasheh8d5596c2006-10-06 15:04:51 -07001182
Mark Fashehccd979b2005-12-15 14:31:24 -08001183 if (status != -ENOENT)
1184 mlog_errno(status);
Mark Fashehccd979b2005-12-15 14:31:24 -08001185 }
Mark Fasheh8d5596c2006-10-06 15:04:51 -07001186
Tao Ma8990e442011-02-23 22:45:26 +08001187 trace_ocfs2_double_lock_end(
1188 (unsigned long long)OCFS2_I(inode1)->ip_blkno,
1189 (unsigned long long)OCFS2_I(inode2)->ip_blkno);
1190
Mark Fashehccd979b2005-12-15 14:31:24 -08001191bail:
Tao Mac1e8d352011-03-07 16:43:21 +08001192 if (status)
1193 mlog_errno(status);
Mark Fashehccd979b2005-12-15 14:31:24 -08001194 return status;
1195}
1196
Mark Fasheh8d5596c2006-10-06 15:04:51 -07001197static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1198{
Mark Fashehe63aecb62007-10-18 15:30:42 -07001199 ocfs2_inode_unlock(inode1, 1);
Mark Fasheh8d5596c2006-10-06 15:04:51 -07001200
1201 if (inode1 != inode2)
Mark Fashehe63aecb62007-10-18 15:30:42 -07001202 ocfs2_inode_unlock(inode2, 1);
Mark Fasheh8d5596c2006-10-06 15:04:51 -07001203}
1204
Mark Fashehccd979b2005-12-15 14:31:24 -08001205static int ocfs2_rename(struct inode *old_dir,
1206 struct dentry *old_dentry,
1207 struct inode *new_dir,
1208 struct dentry *new_dentry)
1209{
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001210 int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
1211 int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
David Howells2b0143b2015-03-17 22:25:59 +00001212 struct inode *old_inode = d_inode(old_dentry);
1213 struct inode *new_inode = d_inode(new_dentry);
Mark Fasheh5098c272006-10-05 18:12:57 -07001214 struct inode *orphan_dir = NULL;
Mark Fashehccd979b2005-12-15 14:31:24 -08001215 struct ocfs2_dinode *newfe = NULL;
1216 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
Mark Fashehccd979b2005-12-15 14:31:24 -08001217 struct buffer_head *newfe_bh = NULL;
Mark Fasheh592282c2007-01-02 17:59:40 -08001218 struct buffer_head *old_inode_bh = NULL;
Mark Fashehccd979b2005-12-15 14:31:24 -08001219 struct ocfs2_super *osb = NULL;
Mark Fasheh5b6a3a22007-09-13 16:33:54 -07001220 u64 newfe_blkno, old_de_ino;
Mark Fasheh1fabe142006-10-09 18:11:45 -07001221 handle_t *handle = NULL;
Mark Fashehccd979b2005-12-15 14:31:24 -08001222 struct buffer_head *old_dir_bh = NULL;
1223 struct buffer_head *new_dir_bh = NULL;
Al Viro847c9db2012-02-12 21:00:05 -05001224 u32 old_dir_nlink = old_dir->i_nlink;
Sunil Mushran480214d2007-08-06 15:11:56 -07001225 struct ocfs2_dinode *old_di;
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001226 struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
1227 struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
1228 struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
1229 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
1230 struct ocfs2_dir_lookup_result target_insert = { NULL, };
alex chen5fb1beb2014-06-23 13:22:07 -07001231 bool should_add_orphan = false;
Mark Fashehccd979b2005-12-15 14:31:24 -08001232
1233 /* At some point it might be nice to break this function up a
1234 * bit. */
1235
Tao Ma8990e442011-02-23 22:45:26 +08001236 trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry,
1237 old_dentry->d_name.len, old_dentry->d_name.name,
1238 new_dentry->d_name.len, new_dentry->d_name.name);
Mark Fashehccd979b2005-12-15 14:31:24 -08001239
Christoph Hellwig871a2932010-03-03 09:05:07 -05001240 dquot_initialize(old_dir);
1241 dquot_initialize(new_dir);
Christoph Hellwig907f4552010-03-03 09:05:06 -05001242
Mark Fashehccd979b2005-12-15 14:31:24 -08001243 osb = OCFS2_SB(old_dir->i_sb);
1244
1245 if (new_inode) {
1246 if (!igrab(new_inode))
1247 BUG();
1248 }
1249
Uwe Kleine-König1b3c3712007-02-17 19:23:03 +01001250 /* Assume a directory hierarchy thusly:
Mark Fashehccd979b2005-12-15 14:31:24 -08001251 * a/b/c
1252 * a/d
1253 * a,b,c, and d are all directories.
1254 *
1255 * from cwd of 'a' on both nodes:
1256 * node1: mv b/c d
1257 * node2: mv d b/c
1258 *
1259 * And that's why, just like the VFS, we need a file system
1260 * rename lock. */
Jan Kara5dabd692008-02-21 18:00:00 +01001261 if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
Mark Fashehccd979b2005-12-15 14:31:24 -08001262 status = ocfs2_rename_lock(osb);
1263 if (status < 0) {
1264 mlog_errno(status);
1265 goto bail;
1266 }
1267 rename_lock = 1;
Yiwen Jiangf7a14f32014-06-23 13:22:09 -07001268
1269 /* here we cannot guarantee the inodes haven't just been
1270 * changed, so check if they are nested again */
1271 status = ocfs2_check_if_ancestor(osb, new_dir->i_ino,
1272 old_inode->i_ino);
1273 if (status < 0) {
1274 mlog_errno(status);
1275 goto bail;
1276 } else if (status == 1) {
1277 status = -EPERM;
1278 trace_ocfs2_rename_not_permitted(
1279 (unsigned long long)old_inode->i_ino,
1280 (unsigned long long)new_dir->i_ino);
1281 goto bail;
1282 }
Mark Fashehccd979b2005-12-15 14:31:24 -08001283 }
1284
Mark Fashehccd979b2005-12-15 14:31:24 -08001285 /* if old and new are the same, this'll just do one lock. */
Mark Fasheh8d5596c2006-10-06 15:04:51 -07001286 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
Xue jiufei53dc20b2015-01-08 14:32:23 -08001287 &new_dir_bh, new_dir, 1);
Mark Fashehccd979b2005-12-15 14:31:24 -08001288 if (status < 0) {
1289 mlog_errno(status);
1290 goto bail;
1291 }
Mark Fasheh8d5596c2006-10-06 15:04:51 -07001292 parents_locked = 1;
Mark Fashehccd979b2005-12-15 14:31:24 -08001293
1294 /* make sure both dirs have bhs
1295 * get an extra ref on old_dir_bh if old==new */
1296 if (!new_dir_bh) {
1297 if (old_dir_bh) {
1298 new_dir_bh = old_dir_bh;
1299 get_bh(new_dir_bh);
1300 } else {
1301 mlog(ML_ERROR, "no old_dir_bh!\n");
1302 status = -EIO;
1303 goto bail;
1304 }
1305 }
1306
Mark Fasheh379dfe92006-09-08 14:21:03 -07001307 /*
Mark Fasheh592282c2007-01-02 17:59:40 -08001308 * Aside from allowing a meta data update, the locking here
Mark Fasheh34d024f2007-09-24 15:56:19 -07001309 * also ensures that the downconvert thread on other nodes
1310 * won't have to concurrently downconvert the inode and the
1311 * dentry locks.
Mark Fasheh379dfe92006-09-08 14:21:03 -07001312 */
Jan Karacb257972009-06-04 15:26:50 +02001313 status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
1314 OI_LS_PARENT);
Mark Fasheh379dfe92006-09-08 14:21:03 -07001315 if (status < 0) {
1316 if (status != -ENOENT)
Mark Fashehccd979b2005-12-15 14:31:24 -08001317 mlog_errno(status);
Mark Fasheh379dfe92006-09-08 14:21:03 -07001318 goto bail;
1319 }
Mark Fasheh8d5596c2006-10-06 15:04:51 -07001320 old_child_locked = 1;
Mark Fashehccd979b2005-12-15 14:31:24 -08001321
Mark Fasheh379dfe92006-09-08 14:21:03 -07001322 status = ocfs2_remote_dentry_delete(old_dentry);
1323 if (status < 0) {
1324 mlog_errno(status);
1325 goto bail;
1326 }
1327
1328 if (S_ISDIR(old_inode->i_mode)) {
Mark Fasheh38760e22007-09-11 17:21:56 -07001329 u64 old_inode_parent;
Mark Fashehccd979b2005-12-15 14:31:24 -08001330
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001331 update_dot_dot = 1;
Mark Fasheh38760e22007-09-11 17:21:56 -07001332 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001333 old_inode,
1334 &old_inode_dot_dot_res);
Mark Fasheh38760e22007-09-11 17:21:56 -07001335 if (status) {
1336 status = -EIO;
Mark Fashehccd979b2005-12-15 14:31:24 -08001337 goto bail;
Mark Fasheh38760e22007-09-11 17:21:56 -07001338 }
1339
1340 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1341 status = -EIO;
Mark Fashehccd979b2005-12-15 14:31:24 -08001342 goto bail;
Mark Fasheh38760e22007-09-11 17:21:56 -07001343 }
1344
1345 if (!new_inode && new_dir != old_dir &&
Mark Fasheh198a1ca2008-11-20 17:54:57 -08001346 new_dir->i_nlink >= ocfs2_link_max(osb)) {
Mark Fasheh38760e22007-09-11 17:21:56 -07001347 status = -EMLINK;
1348 goto bail;
1349 }
Mark Fashehccd979b2005-12-15 14:31:24 -08001350 }
1351
Mark Fasheh5b6a3a22007-09-13 16:33:54 -07001352 status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1353 old_dentry->d_name.len,
1354 &old_de_ino);
1355 if (status) {
1356 status = -ENOENT;
Mark Fashehccd979b2005-12-15 14:31:24 -08001357 goto bail;
Mark Fasheh5b6a3a22007-09-13 16:33:54 -07001358 }
Mark Fashehccd979b2005-12-15 14:31:24 -08001359
1360 /*
1361 * Check for inode number is _not_ due to possible IO errors.
1362 * We might rmdir the source, keep it as pwd of some process
1363 * and merrily kill the link to whatever was created under the
1364 * same name. Goodbye sticky bit ;-<
1365 */
Mark Fasheh5b6a3a22007-09-13 16:33:54 -07001366 if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1367 status = -ENOENT;
Mark Fashehccd979b2005-12-15 14:31:24 -08001368 goto bail;
Mark Fasheh5b6a3a22007-09-13 16:33:54 -07001369 }
Mark Fashehccd979b2005-12-15 14:31:24 -08001370
1371 /* check if the target already exists (in which case we need
1372 * to delete it */
1373 status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1374 new_dentry->d_name.len,
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001375 &newfe_blkno, new_dir,
1376 &target_lookup_res);
Mark Fashehccd979b2005-12-15 14:31:24 -08001377 /* The only error we allow here is -ENOENT because the new
1378 * file not existing is perfectly valid. */
1379 if ((status < 0) && (status != -ENOENT)) {
1380 /* If we cannot find the file specified we should just */
1381 /* return the error... */
1382 mlog_errno(status);
1383 goto bail;
1384 }
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001385 if (status == 0)
1386 target_exists = 1;
Mark Fashehccd979b2005-12-15 14:31:24 -08001387
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001388 if (!target_exists && new_inode) {
Srinivas Eedae325a882007-10-31 16:49:43 -07001389 /*
1390 * Target was unlinked by another node while we were
1391 * waiting to get to ocfs2_rename(). There isn't
1392 * anything we can do here to help the situation, so
1393 * bubble up the appropriate error.
1394 */
1395 status = -ENOENT;
1396 goto bail;
1397 }
Mark Fashehccd979b2005-12-15 14:31:24 -08001398
1399 /* In case we need to overwrite an existing file, we blow it
1400 * away first */
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001401 if (target_exists) {
Mark Fashehccd979b2005-12-15 14:31:24 -08001402 /* VFS didn't think there existed an inode here, but
1403 * someone else in the cluster must have raced our
1404 * rename to create one. Today we error cleanly, in
1405 * the future we should consider calling iget to build
1406 * a new struct inode for this entry. */
1407 if (!new_inode) {
1408 status = -EACCES;
1409
Tao Ma8990e442011-02-23 22:45:26 +08001410 trace_ocfs2_rename_target_exists(new_dentry->d_name.len,
1411 new_dentry->d_name.name);
Mark Fashehccd979b2005-12-15 14:31:24 -08001412 goto bail;
1413 }
1414
1415 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1416 status = -EACCES;
1417
Tao Ma8990e442011-02-23 22:45:26 +08001418 trace_ocfs2_rename_disagree(
Mark Fashehb06970532006-03-03 10:24:33 -08001419 (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1420 (unsigned long long)newfe_blkno,
Mark Fashehccd979b2005-12-15 14:31:24 -08001421 OCFS2_I(new_inode)->ip_flags);
1422 goto bail;
1423 }
1424
Mark Fashehe63aecb62007-10-18 15:30:42 -07001425 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
Mark Fashehccd979b2005-12-15 14:31:24 -08001426 if (status < 0) {
1427 if (status != -ENOENT)
1428 mlog_errno(status);
1429 goto bail;
1430 }
Mark Fasheh8d5596c2006-10-06 15:04:51 -07001431 new_child_locked = 1;
Mark Fashehccd979b2005-12-15 14:31:24 -08001432
Mark Fasheh379dfe92006-09-08 14:21:03 -07001433 status = ocfs2_remote_dentry_delete(new_dentry);
Mark Fashehccd979b2005-12-15 14:31:24 -08001434 if (status < 0) {
1435 mlog_errno(status);
1436 goto bail;
1437 }
1438
1439 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1440
Tao Ma8990e442011-02-23 22:45:26 +08001441 trace_ocfs2_rename_over_existing(
Mark Fashehb06970532006-03-03 10:24:33 -08001442 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
Mark Fashehccd979b2005-12-15 14:31:24 -08001443 (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1444
1445 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
Mark Fasheh5098c272006-10-05 18:12:57 -07001446 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
Tao Ma19bd3412009-08-18 11:44:10 +08001447 OCFS2_I(new_inode)->ip_blkno,
Joseph Qi06ee5c72015-02-16 15:59:54 -08001448 orphan_name, &orphan_insert,
1449 false);
Mark Fashehccd979b2005-12-15 14:31:24 -08001450 if (status < 0) {
1451 mlog_errno(status);
1452 goto bail;
1453 }
alex chen5fb1beb2014-06-23 13:22:07 -07001454 should_add_orphan = true;
Mark Fashehccd979b2005-12-15 14:31:24 -08001455 }
1456 } else {
David Howells2b0143b2015-03-17 22:25:59 +00001457 BUG_ON(d_inode(new_dentry->d_parent) != new_dir);
Mark Fashehccd979b2005-12-15 14:31:24 -08001458
1459 status = ocfs2_check_dir_for_entry(new_dir,
1460 new_dentry->d_name.name,
1461 new_dentry->d_name.len);
1462 if (status)
1463 goto bail;
1464
1465 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1466 new_dentry->d_name.name,
1467 new_dentry->d_name.len,
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001468 &target_insert);
Mark Fashehccd979b2005-12-15 14:31:24 -08001469 if (status < 0) {
1470 mlog_errno(status);
1471 goto bail;
1472 }
1473 }
1474
Jan Karaa90714c2008-10-09 19:38:40 +02001475 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
Mark Fashehccd979b2005-12-15 14:31:24 -08001476 if (IS_ERR(handle)) {
1477 status = PTR_ERR(handle);
1478 handle = NULL;
1479 mlog_errno(status);
1480 goto bail;
1481 }
1482
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001483 if (target_exists) {
Mark Fashehccd979b2005-12-15 14:31:24 -08001484 if (S_ISDIR(new_inode->i_mode)) {
Mark Fashehb80b5492009-02-18 11:41:38 -08001485 if (new_inode->i_nlink != 2 ||
1486 !ocfs2_empty_dir(new_inode)) {
Mark Fashehccd979b2005-12-15 14:31:24 -08001487 status = -ENOTEMPTY;
1488 goto bail;
1489 }
1490 }
Joel Becker0cf2f762009-02-12 16:41:25 -08001491 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode),
1492 newfe_bh,
Joel Becker13723d02008-10-17 19:25:01 -07001493 OCFS2_JOURNAL_ACCESS_WRITE);
Mark Fashehccd979b2005-12-15 14:31:24 -08001494 if (status < 0) {
1495 mlog_errno(status);
1496 goto bail;
1497 }
1498
Mark Fashehccd979b2005-12-15 14:31:24 -08001499 /* change the dirent to point to the correct inode */
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001500 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1501 old_inode);
Mark Fashehccd979b2005-12-15 14:31:24 -08001502 if (status < 0) {
1503 mlog_errno(status);
1504 goto bail;
1505 }
Mark Fashehccd979b2005-12-15 14:31:24 -08001506 new_dir->i_version++;
Mark Fashehccd979b2005-12-15 14:31:24 -08001507
1508 if (S_ISDIR(new_inode->i_mode))
Mark Fasheh198a1ca2008-11-20 17:54:57 -08001509 ocfs2_set_links_count(newfe, 0);
Mark Fashehccd979b2005-12-15 14:31:24 -08001510 else
Mark Fasheh198a1ca2008-11-20 17:54:57 -08001511 ocfs2_add_links_count(newfe, -1);
Joel Beckerec20cec2010-03-19 14:13:52 -07001512 ocfs2_journal_dirty(handle, newfe_bh);
alex chen5fb1beb2014-06-23 13:22:07 -07001513 if (should_add_orphan) {
1514 status = ocfs2_orphan_add(osb, handle, new_inode,
1515 newfe_bh, orphan_name,
Joseph Qi06ee5c72015-02-16 15:59:54 -08001516 &orphan_insert, orphan_dir, false);
alex chen5fb1beb2014-06-23 13:22:07 -07001517 if (status < 0) {
1518 mlog_errno(status);
1519 goto bail;
1520 }
1521 }
Mark Fashehccd979b2005-12-15 14:31:24 -08001522 } else {
1523 /* if the name was not found in new_dir, add it now */
1524 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1525 OCFS2_I(old_inode)->ip_blkno,
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001526 new_dir_bh, &target_insert);
Mark Fashehccd979b2005-12-15 14:31:24 -08001527 }
1528
1529 old_inode->i_ctime = CURRENT_TIME;
1530 mark_inode_dirty(old_inode);
Sunil Mushran480214d2007-08-06 15:11:56 -07001531
Joel Becker0cf2f762009-02-12 16:41:25 -08001532 status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode),
1533 old_inode_bh,
Joel Becker13723d02008-10-17 19:25:01 -07001534 OCFS2_JOURNAL_ACCESS_WRITE);
Sunil Mushran480214d2007-08-06 15:11:56 -07001535 if (status >= 0) {
1536 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1537
1538 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
1539 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
Joel Beckerec20cec2010-03-19 14:13:52 -07001540 ocfs2_journal_dirty(handle, old_inode_bh);
Sunil Mushran480214d2007-08-06 15:11:56 -07001541 } else
1542 mlog_errno(status);
Mark Fashehccd979b2005-12-15 14:31:24 -08001543
Mark Fasheh5b6a3a22007-09-13 16:33:54 -07001544 /*
1545 * Now that the name has been added to new_dir, remove the old name.
1546 *
1547 * We don't keep any directory entry context around until now
1548 * because the insert might have changed the type of directory
1549 * we're dealing with.
1550 */
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001551 status = ocfs2_find_entry(old_dentry->d_name.name,
1552 old_dentry->d_name.len, old_dir,
1553 &old_entry_lookup);
1554 if (status)
Mark Fasheh5b6a3a22007-09-13 16:33:54 -07001555 goto bail;
Mark Fasheh5b6a3a22007-09-13 16:33:54 -07001556
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001557 status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
Mark Fashehccd979b2005-12-15 14:31:24 -08001558 if (status < 0) {
1559 mlog_errno(status);
1560 goto bail;
1561 }
1562
1563 if (new_inode) {
Miklos Szeredi6d6b77f2011-10-28 14:13:28 +02001564 drop_nlink(new_inode);
Mark Fashehccd979b2005-12-15 14:31:24 -08001565 new_inode->i_ctime = CURRENT_TIME;
1566 }
1567 old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001568
1569 if (update_dot_dot) {
1570 status = ocfs2_update_entry(old_inode, handle,
1571 &old_inode_dot_dot_res, new_dir);
Miklos Szeredi6d6b77f2011-10-28 14:13:28 +02001572 drop_nlink(old_dir);
Mark Fashehccd979b2005-12-15 14:31:24 -08001573 if (new_inode) {
Miklos Szeredi6d6b77f2011-10-28 14:13:28 +02001574 drop_nlink(new_inode);
Mark Fashehccd979b2005-12-15 14:31:24 -08001575 } else {
Dave Hansend8c76e62006-09-30 23:29:04 -07001576 inc_nlink(new_dir);
Mark Fashehccd979b2005-12-15 14:31:24 -08001577 mark_inode_dirty(new_dir);
1578 }
1579 }
1580 mark_inode_dirty(old_dir);
Mark Fasheh592282c2007-01-02 17:59:40 -08001581 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1582 if (new_inode) {
Mark Fashehccd979b2005-12-15 14:31:24 -08001583 mark_inode_dirty(new_inode);
Mark Fasheh592282c2007-01-02 17:59:40 -08001584 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1585 }
Mark Fashehccd979b2005-12-15 14:31:24 -08001586
Mark Fasheh592282c2007-01-02 17:59:40 -08001587 if (old_dir != new_dir) {
1588 /* Keep the same times on both directories.*/
1589 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
1590
1591 /*
1592 * This will also pick up the i_nlink change from the
1593 * block above.
1594 */
1595 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1596 }
Mark Fashehccd979b2005-12-15 14:31:24 -08001597
1598 if (old_dir_nlink != old_dir->i_nlink) {
1599 if (!old_dir_bh) {
1600 mlog(ML_ERROR, "need to change nlink for old dir "
Mark Fashehb06970532006-03-03 10:24:33 -08001601 "%llu from %d to %d but bh is NULL!\n",
1602 (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1603 (int)old_dir_nlink, old_dir->i_nlink);
Mark Fashehccd979b2005-12-15 14:31:24 -08001604 } else {
1605 struct ocfs2_dinode *fe;
Joel Becker0cf2f762009-02-12 16:41:25 -08001606 status = ocfs2_journal_access_di(handle,
1607 INODE_CACHE(old_dir),
1608 old_dir_bh,
1609 OCFS2_JOURNAL_ACCESS_WRITE);
Mark Fashehccd979b2005-12-15 14:31:24 -08001610 fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
Mark Fasheh198a1ca2008-11-20 17:54:57 -08001611 ocfs2_set_links_count(fe, old_dir->i_nlink);
Joel Beckerec20cec2010-03-19 14:13:52 -07001612 ocfs2_journal_dirty(handle, old_dir_bh);
Mark Fashehccd979b2005-12-15 14:31:24 -08001613 }
1614 }
Mark Fasheh379dfe92006-09-08 14:21:03 -07001615 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
Mark Fashehccd979b2005-12-15 14:31:24 -08001616 status = 0;
1617bail:
1618 if (rename_lock)
1619 ocfs2_rename_unlock(osb);
1620
1621 if (handle)
Mark Fasheh02dc1af2006-10-09 16:48:10 -07001622 ocfs2_commit_trans(osb, handle);
Mark Fashehccd979b2005-12-15 14:31:24 -08001623
Mark Fasheh8d5596c2006-10-06 15:04:51 -07001624 if (parents_locked)
1625 ocfs2_double_unlock(old_dir, new_dir);
1626
1627 if (old_child_locked)
Mark Fashehe63aecb62007-10-18 15:30:42 -07001628 ocfs2_inode_unlock(old_inode, 1);
Mark Fasheh8d5596c2006-10-06 15:04:51 -07001629
1630 if (new_child_locked)
Mark Fashehe63aecb62007-10-18 15:30:42 -07001631 ocfs2_inode_unlock(new_inode, 1);
Mark Fasheh8d5596c2006-10-06 15:04:51 -07001632
Mark Fasheh5098c272006-10-05 18:12:57 -07001633 if (orphan_dir) {
1634 /* This was locked for us in ocfs2_prepare_orphan_dir() */
Mark Fashehe63aecb62007-10-18 15:30:42 -07001635 ocfs2_inode_unlock(orphan_dir, 1);
Mark Fasheh5098c272006-10-05 18:12:57 -07001636 mutex_unlock(&orphan_dir->i_mutex);
1637 iput(orphan_dir);
1638 }
1639
Mark Fashehccd979b2005-12-15 14:31:24 -08001640 if (new_inode)
1641 sync_mapping_buffers(old_inode->i_mapping);
1642
1643 if (new_inode)
1644 iput(new_inode);
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001645
1646 ocfs2_free_dir_lookup_result(&target_lookup_res);
1647 ocfs2_free_dir_lookup_result(&old_entry_lookup);
1648 ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1649 ocfs2_free_dir_lookup_result(&orphan_insert);
1650 ocfs2_free_dir_lookup_result(&target_insert);
1651
Mark Fasheha81cb882008-10-07 14:25:16 -07001652 brelse(newfe_bh);
1653 brelse(old_inode_bh);
1654 brelse(old_dir_bh);
1655 brelse(new_dir_bh);
Mark Fashehccd979b2005-12-15 14:31:24 -08001656
Tao Mac1e8d352011-03-07 16:43:21 +08001657 if (status)
1658 mlog_errno(status);
Mark Fashehccd979b2005-12-15 14:31:24 -08001659
1660 return status;
1661}
1662
1663/*
1664 * we expect i_size = strlen(symname). Copy symname into the file
1665 * data, including the null terminator.
1666 */
1667static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
Mark Fasheh1fabe142006-10-09 18:11:45 -07001668 handle_t *handle,
Mark Fashehccd979b2005-12-15 14:31:24 -08001669 struct inode *inode,
1670 const char *symname)
1671{
1672 struct buffer_head **bhs = NULL;
1673 const char *c;
1674 struct super_block *sb = osb->sb;
Mark Fasheh4f902c32007-03-09 16:26:50 -08001675 u64 p_blkno, p_blocks;
Mark Fashehccd979b2005-12-15 14:31:24 -08001676 int virtual, blocks, status, i, bytes_left;
1677
1678 bytes_left = i_size_read(inode) + 1;
1679 /* we can't trust i_blocks because we're actually going to
1680 * write i_size + 1 bytes. */
1681 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1682
Tao Ma8990e442011-02-23 22:45:26 +08001683 trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks,
1684 i_size_read(inode), blocks);
Mark Fashehccd979b2005-12-15 14:31:24 -08001685
1686 /* Sanity check -- make sure we're going to fit. */
1687 if (bytes_left >
1688 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1689 status = -EIO;
1690 mlog_errno(status);
1691 goto bail;
1692 }
1693
1694 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1695 if (!bhs) {
1696 status = -ENOMEM;
1697 mlog_errno(status);
1698 goto bail;
1699 }
1700
Mark Fasheh49cb8d22007-03-09 16:21:46 -08001701 status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1702 NULL);
Mark Fashehccd979b2005-12-15 14:31:24 -08001703 if (status < 0) {
1704 mlog_errno(status);
1705 goto bail;
1706 }
1707
1708 /* links can never be larger than one cluster so we know this
1709 * is all going to be contiguous, but do a sanity check
1710 * anyway. */
1711 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1712 status = -EIO;
1713 mlog_errno(status);
1714 goto bail;
1715 }
1716
1717 virtual = 0;
1718 while(bytes_left > 0) {
1719 c = &symname[virtual * sb->s_blocksize];
1720
1721 bhs[virtual] = sb_getblk(sb, p_blkno);
1722 if (!bhs[virtual]) {
1723 status = -ENOMEM;
1724 mlog_errno(status);
1725 goto bail;
1726 }
Joel Becker8cb471e2009-02-10 20:00:41 -08001727 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode),
1728 bhs[virtual]);
Mark Fashehccd979b2005-12-15 14:31:24 -08001729
Joel Becker0cf2f762009-02-12 16:41:25 -08001730 status = ocfs2_journal_access(handle, INODE_CACHE(inode),
1731 bhs[virtual],
Mark Fashehccd979b2005-12-15 14:31:24 -08001732 OCFS2_JOURNAL_ACCESS_CREATE);
1733 if (status < 0) {
1734 mlog_errno(status);
1735 goto bail;
1736 }
1737
1738 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1739
1740 memcpy(bhs[virtual]->b_data, c,
1741 (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1742 bytes_left);
1743
Joel Beckerec20cec2010-03-19 14:13:52 -07001744 ocfs2_journal_dirty(handle, bhs[virtual]);
Mark Fashehccd979b2005-12-15 14:31:24 -08001745
1746 virtual++;
1747 p_blkno++;
1748 bytes_left -= sb->s_blocksize;
1749 }
1750
1751 status = 0;
1752bail:
1753
1754 if (bhs) {
1755 for(i = 0; i < blocks; i++)
Mark Fasheha81cb882008-10-07 14:25:16 -07001756 brelse(bhs[i]);
Mark Fashehccd979b2005-12-15 14:31:24 -08001757 kfree(bhs);
1758 }
1759
Tao Mac1e8d352011-03-07 16:43:21 +08001760 if (status)
1761 mlog_errno(status);
Mark Fashehccd979b2005-12-15 14:31:24 -08001762 return status;
1763}
1764
1765static int ocfs2_symlink(struct inode *dir,
1766 struct dentry *dentry,
1767 const char *symname)
1768{
1769 int status, l, credits;
1770 u64 newsize;
1771 struct ocfs2_super *osb = NULL;
1772 struct inode *inode = NULL;
1773 struct super_block *sb;
1774 struct buffer_head *new_fe_bh = NULL;
Mark Fashehccd979b2005-12-15 14:31:24 -08001775 struct buffer_head *parent_fe_bh = NULL;
1776 struct ocfs2_dinode *fe = NULL;
1777 struct ocfs2_dinode *dirfe;
Mark Fasheh1fabe142006-10-09 18:11:45 -07001778 handle_t *handle = NULL;
Mark Fashehccd979b2005-12-15 14:31:24 -08001779 struct ocfs2_alloc_context *inode_ac = NULL;
1780 struct ocfs2_alloc_context *data_ac = NULL;
Tiger Yang534eadd2008-11-14 11:16:41 +08001781 struct ocfs2_alloc_context *xattr_ac = NULL;
1782 int want_clusters = 0;
1783 int xattr_credits = 0;
1784 struct ocfs2_security_xattr_info si = {
1785 .enable = 1,
1786 };
Jan Karaa90714c2008-10-09 19:38:40 +02001787 int did_quota = 0, did_quota_inode = 0;
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001788 struct ocfs2_dir_lookup_result lookup = { NULL, };
Joel Becker547ba7c2010-05-10 11:56:52 -07001789 sigset_t oldset;
1790 int did_block_signals = 0;
jiangyiwen595297a2014-06-23 13:22:09 -07001791 struct ocfs2_dentry_lock *dl = NULL;
Mark Fashehccd979b2005-12-15 14:31:24 -08001792
Tao Ma8990e442011-02-23 22:45:26 +08001793 trace_ocfs2_symlink_begin(dir, dentry, symname,
1794 dentry->d_name.len, dentry->d_name.name);
Mark Fashehccd979b2005-12-15 14:31:24 -08001795
Christoph Hellwig871a2932010-03-03 09:05:07 -05001796 dquot_initialize(dir);
Christoph Hellwig907f4552010-03-03 09:05:06 -05001797
Mark Fashehccd979b2005-12-15 14:31:24 -08001798 sb = dir->i_sb;
1799 osb = OCFS2_SB(sb);
1800
1801 l = strlen(symname) + 1;
1802
1803 credits = ocfs2_calc_symlink_credits(sb);
1804
Mark Fashehccd979b2005-12-15 14:31:24 -08001805 /* lock the parent directory */
Mark Fashehe63aecb62007-10-18 15:30:42 -07001806 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
Mark Fashehccd979b2005-12-15 14:31:24 -08001807 if (status < 0) {
1808 if (status != -ENOENT)
1809 mlog_errno(status);
Mark Fasheh6d8fc402006-10-06 11:54:33 -07001810 return status;
Mark Fashehccd979b2005-12-15 14:31:24 -08001811 }
1812
1813 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
Mark Fasheh198a1ca2008-11-20 17:54:57 -08001814 if (!ocfs2_read_links_count(dirfe)) {
Mark Fashehccd979b2005-12-15 14:31:24 -08001815 /* can't make a file in a deleted directory. */
1816 status = -ENOENT;
1817 goto bail;
1818 }
1819
1820 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1821 dentry->d_name.len);
1822 if (status)
1823 goto bail;
1824
1825 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1826 dentry->d_name.name,
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001827 dentry->d_name.len, &lookup);
Mark Fashehccd979b2005-12-15 14:31:24 -08001828 if (status < 0) {
1829 mlog_errno(status);
1830 goto bail;
1831 }
1832
Mark Fashehda5cbf22006-10-06 18:34:35 -07001833 status = ocfs2_reserve_new_inode(osb, &inode_ac);
Mark Fashehccd979b2005-12-15 14:31:24 -08001834 if (status < 0) {
1835 if (status != -ENOSPC)
1836 mlog_errno(status);
1837 goto bail;
1838 }
1839
Tiger Yangf5d36202008-11-14 11:15:44 +08001840 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1841 if (!inode) {
1842 status = -ENOMEM;
1843 mlog_errno(status);
1844 goto bail;
1845 }
1846
Tiger Yang534eadd2008-11-14 11:16:41 +08001847 /* get security xattr */
Eric Paris2a7dba32011-02-01 11:05:39 -05001848 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
Tiger Yang534eadd2008-11-14 11:16:41 +08001849 if (status) {
1850 if (status == -EOPNOTSUPP)
1851 si.enable = 0;
1852 else {
1853 mlog_errno(status);
Mark Fashehccd979b2005-12-15 14:31:24 -08001854 goto bail;
1855 }
1856 }
1857
Tiger Yang534eadd2008-11-14 11:16:41 +08001858 /* calculate meta data/clusters for setting security xattr */
1859 if (si.enable) {
1860 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1861 &xattr_credits, &xattr_ac);
1862 if (status < 0) {
1863 mlog_errno(status);
1864 goto bail;
1865 }
1866 }
1867
1868 /* don't reserve bitmap space for fast symlinks. */
1869 if (l > ocfs2_fast_symlink_chars(sb))
1870 want_clusters += 1;
1871
1872 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1873 if (status < 0) {
1874 if (status != -ENOSPC)
1875 mlog_errno(status);
1876 goto bail;
1877 }
1878
1879 handle = ocfs2_start_trans(osb, credits + xattr_credits);
Mark Fashehccd979b2005-12-15 14:31:24 -08001880 if (IS_ERR(handle)) {
1881 status = PTR_ERR(handle);
1882 handle = NULL;
1883 mlog_errno(status);
1884 goto bail;
1885 }
1886
Joel Becker547ba7c2010-05-10 11:56:52 -07001887 /* Starting to change things, restart is no longer possible. */
1888 ocfs2_block_signals(&oldset);
1889 did_block_signals = 1;
1890
Christoph Hellwig63936dd2010-03-03 09:05:01 -05001891 status = dquot_alloc_inode(inode);
1892 if (status)
Jan Karaa90714c2008-10-09 19:38:40 +02001893 goto bail;
Jan Karaa90714c2008-10-09 19:38:40 +02001894 did_quota_inode = 1;
1895
Tao Ma8990e442011-02-23 22:45:26 +08001896 trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len,
1897 dentry->d_name.name,
1898 (unsigned long long)OCFS2_I(dir)->ip_blkno,
1899 inode->i_mode);
Tao Ma19bd3412009-08-18 11:44:10 +08001900
1901 status = ocfs2_mknod_locked(osb, dir, inode,
Tiger Yangf5d36202008-11-14 11:15:44 +08001902 0, &new_fe_bh, parent_fe_bh, handle,
1903 inode_ac);
Mark Fashehccd979b2005-12-15 14:31:24 -08001904 if (status < 0) {
1905 mlog_errno(status);
1906 goto bail;
1907 }
1908
1909 fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1910 inode->i_rdev = 0;
1911 newsize = l - 1;
Al Viroea022dfb2012-05-03 10:14:29 -04001912 inode->i_op = &ocfs2_symlink_inode_operations;
Mark Fashehccd979b2005-12-15 14:31:24 -08001913 if (l > ocfs2_fast_symlink_chars(sb)) {
Mark Fashehdcd05382007-01-16 11:32:23 -08001914 u32 offset = 0;
1915
Christoph Hellwig5dd40562010-03-03 09:05:00 -05001916 status = dquot_alloc_space_nodirty(inode,
1917 ocfs2_clusters_to_bytes(osb->sb, 1));
1918 if (status)
Jan Karaa90714c2008-10-09 19:38:40 +02001919 goto bail;
Jan Karaa90714c2008-10-09 19:38:40 +02001920 did_quota = 1;
Al Viroea022dfb2012-05-03 10:14:29 -04001921 inode->i_mapping->a_ops = &ocfs2_aops;
Tao Ma0eb8d472008-08-18 17:38:45 +08001922 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1923 new_fe_bh,
1924 handle, data_ac, NULL,
1925 NULL);
Mark Fashehccd979b2005-12-15 14:31:24 -08001926 if (status < 0) {
1927 if (status != -ENOSPC && status != -EINTR) {
Mark Fashehb06970532006-03-03 10:24:33 -08001928 mlog(ML_ERROR,
1929 "Failed to extend file to %llu\n",
1930 (unsigned long long)newsize);
Mark Fashehccd979b2005-12-15 14:31:24 -08001931 mlog_errno(status);
1932 status = -ENOSPC;
1933 }
1934 goto bail;
1935 }
1936 i_size_write(inode, newsize);
Mark Fasheh8110b072007-03-22 16:53:23 -07001937 inode->i_blocks = ocfs2_inode_sector_count(inode);
Mark Fashehccd979b2005-12-15 14:31:24 -08001938 } else {
Al Viroea022dfb2012-05-03 10:14:29 -04001939 inode->i_mapping->a_ops = &ocfs2_fast_symlink_aops;
Mark Fashehccd979b2005-12-15 14:31:24 -08001940 memcpy((char *) fe->id2.i_symlink, symname, l);
1941 i_size_write(inode, newsize);
1942 inode->i_blocks = 0;
1943 }
1944
1945 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1946 if (status < 0) {
1947 mlog_errno(status);
1948 goto bail;
1949 }
1950
1951 if (!ocfs2_inode_is_fast_symlink(inode)) {
1952 status = ocfs2_create_symlink_data(osb, handle, inode,
1953 symname);
1954 if (status < 0) {
1955 mlog_errno(status);
1956 goto bail;
1957 }
1958 }
1959
Tiger Yang534eadd2008-11-14 11:16:41 +08001960 if (si.enable) {
1961 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
1962 xattr_ac, data_ac);
1963 if (status < 0) {
1964 mlog_errno(status);
1965 goto bail;
1966 }
1967 }
1968
Mark Fasheha9743fc2010-04-23 11:42:22 -07001969 /*
1970 * Do this before adding the entry to the directory. We add
1971 * also set d_op after success so that ->d_iput() will cleanup
1972 * the dentry lock even if ocfs2_add_entry() fails below.
1973 */
1974 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
1975 if (status) {
1976 mlog_errno(status);
1977 goto bail;
1978 }
Mark Fasheha9743fc2010-04-23 11:42:22 -07001979
jiangyiwen595297a2014-06-23 13:22:09 -07001980 dl = dentry->d_fsdata;
1981
Mark Fashehccd979b2005-12-15 14:31:24 -08001982 status = ocfs2_add_entry(handle, dentry, inode,
1983 le64_to_cpu(fe->i_blkno), parent_fe_bh,
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001984 &lookup);
Mark Fashehccd979b2005-12-15 14:31:24 -08001985 if (status < 0) {
1986 mlog_errno(status);
1987 goto bail;
1988 }
1989
1990 insert_inode_hash(inode);
Mark Fashehccd979b2005-12-15 14:31:24 -08001991 d_instantiate(dentry, inode);
1992bail:
Jan Karaa90714c2008-10-09 19:38:40 +02001993 if (status < 0 && did_quota)
Christoph Hellwig5dd40562010-03-03 09:05:00 -05001994 dquot_free_space_nodirty(inode,
Jan Karaa90714c2008-10-09 19:38:40 +02001995 ocfs2_clusters_to_bytes(osb->sb, 1));
1996 if (status < 0 && did_quota_inode)
Christoph Hellwig63936dd2010-03-03 09:05:01 -05001997 dquot_free_inode(inode);
Mark Fashehccd979b2005-12-15 14:31:24 -08001998 if (handle)
Mark Fasheh02dc1af2006-10-09 16:48:10 -07001999 ocfs2_commit_trans(osb, handle);
Mark Fasheh6d8fc402006-10-06 11:54:33 -07002000
Mark Fashehe63aecb62007-10-18 15:30:42 -07002001 ocfs2_inode_unlock(dir, 1);
Joel Becker547ba7c2010-05-10 11:56:52 -07002002 if (did_block_signals)
2003 ocfs2_unblock_signals(&oldset);
Mark Fasheh6d8fc402006-10-06 11:54:33 -07002004
Mark Fasheha81cb882008-10-07 14:25:16 -07002005 brelse(new_fe_bh);
2006 brelse(parent_fe_bh);
Tiger Yang534eadd2008-11-14 11:16:41 +08002007 kfree(si.value);
Mark Fasheh4a12ca32008-11-12 15:43:34 -08002008 ocfs2_free_dir_lookup_result(&lookup);
Mark Fashehccd979b2005-12-15 14:31:24 -08002009 if (inode_ac)
2010 ocfs2_free_alloc_context(inode_ac);
2011 if (data_ac)
2012 ocfs2_free_alloc_context(data_ac);
Tiger Yang534eadd2008-11-14 11:16:41 +08002013 if (xattr_ac)
2014 ocfs2_free_alloc_context(xattr_ac);
Tiger Yangf5d36202008-11-14 11:15:44 +08002015 if ((status < 0) && inode) {
jiangyiwen595297a2014-06-23 13:22:09 -07002016 if (dl)
2017 ocfs2_cleanup_add_entry_failure(osb, dentry, inode);
2018
Li Dongyangab41fdc2010-04-22 16:11:25 +08002019 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
Tiger Yangf5d36202008-11-14 11:15:44 +08002020 clear_nlink(inode);
Mark Fashehccd979b2005-12-15 14:31:24 -08002021 iput(inode);
Tiger Yangf5d36202008-11-14 11:15:44 +08002022 }
Mark Fashehccd979b2005-12-15 14:31:24 -08002023
Tao Mac1e8d352011-03-07 16:43:21 +08002024 if (status)
2025 mlog_errno(status);
Mark Fashehccd979b2005-12-15 14:31:24 -08002026
2027 return status;
2028}
2029
Mark Fashehccd979b2005-12-15 14:31:24 -08002030static int ocfs2_blkno_stringify(u64 blkno, char *name)
2031{
2032 int status, namelen;
2033
Mark Fashehb06970532006-03-03 10:24:33 -08002034 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
2035 (long long)blkno);
Mark Fashehccd979b2005-12-15 14:31:24 -08002036 if (namelen <= 0) {
2037 if (namelen)
2038 status = namelen;
2039 else
2040 status = -EINVAL;
2041 mlog_errno(status);
2042 goto bail;
2043 }
2044 if (namelen != OCFS2_ORPHAN_NAMELEN) {
2045 status = -EINVAL;
2046 mlog_errno(status);
2047 goto bail;
2048 }
2049
Tao Ma8990e442011-02-23 22:45:26 +08002050 trace_ocfs2_blkno_stringify(blkno, name, namelen);
Mark Fashehccd979b2005-12-15 14:31:24 -08002051
2052 status = 0;
2053bail:
Tao Mac1e8d352011-03-07 16:43:21 +08002054 if (status < 0)
2055 mlog_errno(status);
Mark Fashehccd979b2005-12-15 14:31:24 -08002056 return status;
2057}
2058
Mark Fashehdd43bcd2010-08-13 15:15:18 -07002059static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb,
2060 struct inode **ret_orphan_dir,
2061 struct buffer_head **ret_orphan_dir_bh)
2062{
2063 struct inode *orphan_dir_inode;
2064 struct buffer_head *orphan_dir_bh = NULL;
2065 int ret = 0;
2066
2067 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2068 ORPHAN_DIR_SYSTEM_INODE,
2069 osb->slot_num);
2070 if (!orphan_dir_inode) {
2071 ret = -ENOENT;
2072 mlog_errno(ret);
2073 return ret;
2074 }
2075
2076 mutex_lock(&orphan_dir_inode->i_mutex);
2077
2078 ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2079 if (ret < 0) {
2080 mutex_unlock(&orphan_dir_inode->i_mutex);
2081 iput(orphan_dir_inode);
2082
2083 mlog_errno(ret);
2084 return ret;
2085 }
2086
2087 *ret_orphan_dir = orphan_dir_inode;
2088 *ret_orphan_dir_bh = orphan_dir_bh;
2089
2090 return 0;
2091}
2092
2093static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode,
2094 struct buffer_head *orphan_dir_bh,
2095 u64 blkno,
2096 char *name,
Joseph Qi06ee5c72015-02-16 15:59:54 -08002097 struct ocfs2_dir_lookup_result *lookup,
2098 bool dio)
Mark Fashehdd43bcd2010-08-13 15:15:18 -07002099{
2100 int ret;
2101 struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb);
Joseph Qi06ee5c72015-02-16 15:59:54 -08002102 int namelen = dio ?
2103 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2104 OCFS2_ORPHAN_NAMELEN;
Mark Fashehdd43bcd2010-08-13 15:15:18 -07002105
Joseph Qi06ee5c72015-02-16 15:59:54 -08002106 if (dio) {
2107 ret = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2108 OCFS2_DIO_ORPHAN_PREFIX);
2109 if (ret != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2110 ret = -EINVAL;
2111 mlog_errno(ret);
2112 return ret;
2113 }
2114
2115 ret = ocfs2_blkno_stringify(blkno,
2116 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2117 } else
2118 ret = ocfs2_blkno_stringify(blkno, name);
Mark Fashehdd43bcd2010-08-13 15:15:18 -07002119 if (ret < 0) {
2120 mlog_errno(ret);
2121 return ret;
2122 }
2123
2124 ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
2125 orphan_dir_bh, name,
Joseph Qi06ee5c72015-02-16 15:59:54 -08002126 namelen, lookup);
Mark Fashehdd43bcd2010-08-13 15:15:18 -07002127 if (ret < 0) {
2128 mlog_errno(ret);
2129 return ret;
2130 }
2131
2132 return 0;
2133}
2134
2135/**
2136 * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for
2137 * insertion of an orphan.
2138 * @osb: ocfs2 file system
2139 * @ret_orphan_dir: Orphan dir inode - returned locked!
2140 * @blkno: Actual block number of the inode to be inserted into orphan dir.
2141 * @lookup: dir lookup result, to be passed back into functions like
2142 * ocfs2_orphan_add
2143 *
2144 * Returns zero on success and the ret_orphan_dir, name and lookup
2145 * fields will be populated.
2146 *
2147 * Returns non-zero on failure.
2148 */
Mark Fashehccd979b2005-12-15 14:31:24 -08002149static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
Mark Fasheh5098c272006-10-05 18:12:57 -07002150 struct inode **ret_orphan_dir,
Tao Ma19bd3412009-08-18 11:44:10 +08002151 u64 blkno,
Mark Fashehccd979b2005-12-15 14:31:24 -08002152 char *name,
Joseph Qi06ee5c72015-02-16 15:59:54 -08002153 struct ocfs2_dir_lookup_result *lookup,
2154 bool dio)
Mark Fashehccd979b2005-12-15 14:31:24 -08002155{
Mark Fashehdd43bcd2010-08-13 15:15:18 -07002156 struct inode *orphan_dir_inode = NULL;
Mark Fashehccd979b2005-12-15 14:31:24 -08002157 struct buffer_head *orphan_dir_bh = NULL;
Mark Fashehdd43bcd2010-08-13 15:15:18 -07002158 int ret = 0;
Mark Fashehccd979b2005-12-15 14:31:24 -08002159
Mark Fashehdd43bcd2010-08-13 15:15:18 -07002160 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode,
2161 &orphan_dir_bh);
2162 if (ret < 0) {
2163 mlog_errno(ret);
2164 return ret;
Mark Fashehccd979b2005-12-15 14:31:24 -08002165 }
2166
Mark Fashehdd43bcd2010-08-13 15:15:18 -07002167 ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh,
Joseph Qi06ee5c72015-02-16 15:59:54 -08002168 blkno, name, lookup, dio);
Mark Fashehdd43bcd2010-08-13 15:15:18 -07002169 if (ret < 0) {
2170 mlog_errno(ret);
2171 goto out;
Mark Fashehccd979b2005-12-15 14:31:24 -08002172 }
2173
Mark Fasheh5098c272006-10-05 18:12:57 -07002174 *ret_orphan_dir = orphan_dir_inode;
2175
Mark Fashehdd43bcd2010-08-13 15:15:18 -07002176out:
2177 brelse(orphan_dir_bh);
2178
2179 if (ret) {
2180 ocfs2_inode_unlock(orphan_dir_inode, 1);
Mark Fasheh5098c272006-10-05 18:12:57 -07002181 mutex_unlock(&orphan_dir_inode->i_mutex);
Mark Fashehccd979b2005-12-15 14:31:24 -08002182 iput(orphan_dir_inode);
Mark Fasheh5098c272006-10-05 18:12:57 -07002183 }
Mark Fashehccd979b2005-12-15 14:31:24 -08002184
Tao Mac1e8d352011-03-07 16:43:21 +08002185 if (ret)
2186 mlog_errno(ret);
Mark Fashehdd43bcd2010-08-13 15:15:18 -07002187 return ret;
Mark Fashehccd979b2005-12-15 14:31:24 -08002188}
2189
2190static int ocfs2_orphan_add(struct ocfs2_super *osb,
Mark Fasheh1fabe142006-10-09 18:11:45 -07002191 handle_t *handle,
Mark Fashehccd979b2005-12-15 14:31:24 -08002192 struct inode *inode,
Tristan Ye3939fda2010-03-19 09:21:09 +08002193 struct buffer_head *fe_bh,
Mark Fashehccd979b2005-12-15 14:31:24 -08002194 char *name,
Mark Fasheh4a12ca32008-11-12 15:43:34 -08002195 struct ocfs2_dir_lookup_result *lookup,
Joseph Qi06ee5c72015-02-16 15:59:54 -08002196 struct inode *orphan_dir_inode,
2197 bool dio)
Mark Fashehccd979b2005-12-15 14:31:24 -08002198{
Mark Fashehccd979b2005-12-15 14:31:24 -08002199 struct buffer_head *orphan_dir_bh = NULL;
2200 int status = 0;
2201 struct ocfs2_dinode *orphan_fe;
Tristan Ye3939fda2010-03-19 09:21:09 +08002202 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
Joseph Qi06ee5c72015-02-16 15:59:54 -08002203 int namelen = dio ?
2204 (OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN) :
2205 OCFS2_ORPHAN_NAMELEN;
Mark Fashehccd979b2005-12-15 14:31:24 -08002206
Tao Ma8990e442011-02-23 22:45:26 +08002207 trace_ocfs2_orphan_add_begin(
2208 (unsigned long long)OCFS2_I(inode)->ip_blkno);
Mark Fashehccd979b2005-12-15 14:31:24 -08002209
Joel Beckerb657c952008-11-13 14:49:11 -08002210 status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
Mark Fashehccd979b2005-12-15 14:31:24 -08002211 if (status < 0) {
2212 mlog_errno(status);
2213 goto leave;
2214 }
2215
Joel Becker0cf2f762009-02-12 16:41:25 -08002216 status = ocfs2_journal_access_di(handle,
2217 INODE_CACHE(orphan_dir_inode),
2218 orphan_dir_bh,
Joel Becker13723d02008-10-17 19:25:01 -07002219 OCFS2_JOURNAL_ACCESS_WRITE);
Mark Fashehccd979b2005-12-15 14:31:24 -08002220 if (status < 0) {
2221 mlog_errno(status);
2222 goto leave;
2223 }
2224
Tristan Ye3939fda2010-03-19 09:21:09 +08002225 /*
2226 * We're going to journal the change of i_flags and i_orphaned_slot.
2227 * It's safe anyway, though some callers may duplicate the journaling.
2228 * Journaling within the func just make the logic look more
2229 * straightforward.
2230 */
2231 status = ocfs2_journal_access_di(handle,
2232 INODE_CACHE(inode),
2233 fe_bh,
2234 OCFS2_JOURNAL_ACCESS_WRITE);
2235 if (status < 0) {
2236 mlog_errno(status);
2237 goto leave;
2238 }
2239
Younger Liuea454662013-07-03 15:00:58 -07002240 /* we're a cluster, and nlink can change on disk from
2241 * underneath us... */
2242 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2243 if (S_ISDIR(inode->i_mode))
2244 ocfs2_add_links_count(orphan_fe, 1);
2245 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2246 ocfs2_journal_dirty(handle, orphan_dir_bh);
2247
2248 status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
Joseph Qi06ee5c72015-02-16 15:59:54 -08002249 namelen, inode,
Younger Liuea454662013-07-03 15:00:58 -07002250 OCFS2_I(inode)->ip_blkno,
2251 orphan_dir_bh, lookup);
2252 if (status < 0) {
2253 mlog_errno(status);
2254 goto rollback;
2255 }
2256
Joseph Qi06ee5c72015-02-16 15:59:54 -08002257 if (dio) {
2258 /* Update flag OCFS2_DIO_ORPHANED_FL and record the orphan
2259 * slot.
2260 */
2261 fe->i_flags |= cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2262 fe->i_dio_orphaned_slot = cpu_to_le16(osb->slot_num);
2263 } else {
2264 fe->i_flags |= cpu_to_le32(OCFS2_ORPHANED_FL);
2265 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR;
Mark Fashehccd979b2005-12-15 14:31:24 -08002266
Joseph Qi06ee5c72015-02-16 15:59:54 -08002267 /* Record which orphan dir our inode now resides
2268 * in. delete_inode will use this to determine which orphan
2269 * dir to lock. */
2270 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
2271 }
Mark Fashehccd979b2005-12-15 14:31:24 -08002272
Tristan Ye3939fda2010-03-19 09:21:09 +08002273 ocfs2_journal_dirty(handle, fe_bh);
2274
Tao Ma8990e442011-02-23 22:45:26 +08002275 trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno,
2276 osb->slot_num);
Mark Fashehccd979b2005-12-15 14:31:24 -08002277
Younger Liuea454662013-07-03 15:00:58 -07002278rollback:
2279 if (status < 0) {
2280 if (S_ISDIR(inode->i_mode))
2281 ocfs2_add_links_count(orphan_fe, -1);
2282 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
2283 }
2284
Mark Fashehccd979b2005-12-15 14:31:24 -08002285leave:
Mark Fasheha81cb882008-10-07 14:25:16 -07002286 brelse(orphan_dir_bh);
Mark Fashehccd979b2005-12-15 14:31:24 -08002287
Mark Fashehccd979b2005-12-15 14:31:24 -08002288 return status;
2289}
2290
2291/* unlike orphan_add, we expect the orphan dir to already be locked here. */
2292int ocfs2_orphan_del(struct ocfs2_super *osb,
Mark Fasheh1fabe142006-10-09 18:11:45 -07002293 handle_t *handle,
Mark Fashehccd979b2005-12-15 14:31:24 -08002294 struct inode *orphan_dir_inode,
2295 struct inode *inode,
Joseph Qi06ee5c72015-02-16 15:59:54 -08002296 struct buffer_head *orphan_dir_bh,
2297 bool dio)
Mark Fashehccd979b2005-12-15 14:31:24 -08002298{
Joseph Qi06ee5c72015-02-16 15:59:54 -08002299 const int namelen = OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN;
2300 char name[namelen + 1];
Mark Fashehccd979b2005-12-15 14:31:24 -08002301 struct ocfs2_dinode *orphan_fe;
2302 int status = 0;
Mark Fasheh4a12ca32008-11-12 15:43:34 -08002303 struct ocfs2_dir_lookup_result lookup = { NULL, };
Mark Fashehccd979b2005-12-15 14:31:24 -08002304
Joseph Qi06ee5c72015-02-16 15:59:54 -08002305 if (dio) {
2306 status = snprintf(name, OCFS2_DIO_ORPHAN_PREFIX_LEN + 1, "%s",
2307 OCFS2_DIO_ORPHAN_PREFIX);
2308 if (status != OCFS2_DIO_ORPHAN_PREFIX_LEN) {
2309 status = -EINVAL;
2310 mlog_errno(status);
2311 return status;
2312 }
2313
2314 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno,
2315 name + OCFS2_DIO_ORPHAN_PREFIX_LEN);
2316 } else
2317 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
Mark Fashehccd979b2005-12-15 14:31:24 -08002318 if (status < 0) {
2319 mlog_errno(status);
2320 goto leave;
2321 }
2322
Tao Ma8990e442011-02-23 22:45:26 +08002323 trace_ocfs2_orphan_del(
2324 (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
Joseph Qie38a5732015-04-14 15:43:22 -07002325 name, strlen(name));
Mark Fashehccd979b2005-12-15 14:31:24 -08002326
2327 /* find it's spot in the orphan directory */
Joseph Qie38a5732015-04-14 15:43:22 -07002328 status = ocfs2_find_entry(name, strlen(name), orphan_dir_inode,
Mark Fasheh4a12ca32008-11-12 15:43:34 -08002329 &lookup);
2330 if (status) {
Mark Fashehccd979b2005-12-15 14:31:24 -08002331 mlog_errno(status);
2332 goto leave;
2333 }
2334
2335 /* remove it from the orphan directory */
Mark Fasheh4a12ca32008-11-12 15:43:34 -08002336 status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
Mark Fashehccd979b2005-12-15 14:31:24 -08002337 if (status < 0) {
2338 mlog_errno(status);
2339 goto leave;
2340 }
2341
Joel Becker0cf2f762009-02-12 16:41:25 -08002342 status = ocfs2_journal_access_di(handle,
2343 INODE_CACHE(orphan_dir_inode),
2344 orphan_dir_bh,
Joel Becker13723d02008-10-17 19:25:01 -07002345 OCFS2_JOURNAL_ACCESS_WRITE);
Mark Fashehccd979b2005-12-15 14:31:24 -08002346 if (status < 0) {
2347 mlog_errno(status);
2348 goto leave;
2349 }
2350
2351 /* do the i_nlink dance! :) */
2352 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2353 if (S_ISDIR(inode->i_mode))
Mark Fasheh198a1ca2008-11-20 17:54:57 -08002354 ocfs2_add_links_count(orphan_fe, -1);
Miklos Szeredibfe86842011-10-28 14:13:29 +02002355 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
Joel Beckerec20cec2010-03-19 14:13:52 -07002356 ocfs2_journal_dirty(handle, orphan_dir_bh);
Mark Fashehccd979b2005-12-15 14:31:24 -08002357
2358leave:
Mark Fasheh4a12ca32008-11-12 15:43:34 -08002359 ocfs2_free_dir_lookup_result(&lookup);
Mark Fashehccd979b2005-12-15 14:31:24 -08002360
Tao Mac1e8d352011-03-07 16:43:21 +08002361 if (status)
2362 mlog_errno(status);
Mark Fashehccd979b2005-12-15 14:31:24 -08002363 return status;
2364}
2365
Mark Fasheh97b8f4a2010-08-13 15:15:19 -07002366/**
Lucas De Marchi25985ed2011-03-30 22:57:33 -03002367 * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly
Mark Fasheh97b8f4a2010-08-13 15:15:19 -07002368 * allocated file. This is different from the typical 'add to orphan dir'
2369 * operation in that the inode does not yet exist. This is a problem because
2370 * the orphan dir stringifies the inode block number to come up with it's
2371 * dirent. Obviously if the inode does not yet exist we have a chicken and egg
2372 * problem. This function works around it by calling deeper into the orphan
2373 * and suballoc code than other callers. Use this only by necessity.
2374 * @dir: The directory which this inode will ultimately wind up under - not the
2375 * orphan dir!
2376 * @dir_bh: buffer_head the @dir inode block
2377 * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled
2378 * with the string to be used for orphan dirent. Pass back to the orphan dir
2379 * code.
2380 * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan
2381 * dir code.
2382 * @ret_di_blkno: block number where the new inode will be allocated.
2383 * @orphan_insert: Dir insert context to be passed back into orphan dir code.
2384 * @ret_inode_ac: Inode alloc context to be passed back to the allocator.
2385 *
2386 * Returns zero on success and the ret_orphan_dir, name and lookup
2387 * fields will be populated.
2388 *
2389 * Returns non-zero on failure.
2390 */
2391static int ocfs2_prep_new_orphaned_file(struct inode *dir,
2392 struct buffer_head *dir_bh,
2393 char *orphan_name,
2394 struct inode **ret_orphan_dir,
2395 u64 *ret_di_blkno,
2396 struct ocfs2_dir_lookup_result *orphan_insert,
2397 struct ocfs2_alloc_context **ret_inode_ac)
2398{
2399 int ret;
2400 u64 di_blkno;
2401 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2402 struct inode *orphan_dir = NULL;
2403 struct buffer_head *orphan_dir_bh = NULL;
2404 struct ocfs2_alloc_context *inode_ac = NULL;
2405
2406 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh);
2407 if (ret < 0) {
2408 mlog_errno(ret);
2409 return ret;
2410 }
2411
2412 /* reserve an inode spot */
2413 ret = ocfs2_reserve_new_inode(osb, &inode_ac);
2414 if (ret < 0) {
2415 if (ret != -ENOSPC)
2416 mlog_errno(ret);
2417 goto out;
2418 }
2419
2420 ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac,
2421 &di_blkno);
2422 if (ret) {
2423 mlog_errno(ret);
2424 goto out;
2425 }
2426
2427 ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh,
Joseph Qi06ee5c72015-02-16 15:59:54 -08002428 di_blkno, orphan_name, orphan_insert,
2429 false);
Mark Fasheh97b8f4a2010-08-13 15:15:19 -07002430 if (ret < 0) {
2431 mlog_errno(ret);
2432 goto out;
2433 }
2434
2435out:
2436 if (ret == 0) {
2437 *ret_orphan_dir = orphan_dir;
2438 *ret_di_blkno = di_blkno;
2439 *ret_inode_ac = inode_ac;
2440 /*
2441 * orphan_name and orphan_insert are already up to
2442 * date via prepare_orphan_dir
2443 */
2444 } else {
2445 /* Unroll reserve_new_inode* */
2446 if (inode_ac)
2447 ocfs2_free_alloc_context(inode_ac);
2448
2449 /* Unroll orphan dir locking */
2450 mutex_unlock(&orphan_dir->i_mutex);
2451 ocfs2_inode_unlock(orphan_dir, 1);
2452 iput(orphan_dir);
2453 }
2454
2455 brelse(orphan_dir_bh);
2456
Xiaowei.Hu7869e592013-06-12 14:04:41 -07002457 return ret;
Mark Fasheh97b8f4a2010-08-13 15:15:19 -07002458}
2459
Tao Mabc13d342009-08-18 11:44:14 +08002460int ocfs2_create_inode_in_orphan(struct inode *dir,
2461 int mode,
2462 struct inode **new_inode)
2463{
2464 int status, did_quota_inode = 0;
2465 struct inode *inode = NULL;
2466 struct inode *orphan_dir = NULL;
2467 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2468 struct ocfs2_dinode *di = NULL;
2469 handle_t *handle = NULL;
2470 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
2471 struct buffer_head *parent_di_bh = NULL;
2472 struct buffer_head *new_di_bh = NULL;
2473 struct ocfs2_alloc_context *inode_ac = NULL;
2474 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
Mark Fasheh97b8f4a2010-08-13 15:15:19 -07002475 u64 uninitialized_var(di_blkno), suballoc_loc;
2476 u16 suballoc_bit;
Tao Mabc13d342009-08-18 11:44:14 +08002477
2478 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2479 if (status < 0) {
2480 if (status != -ENOENT)
2481 mlog_errno(status);
2482 return status;
2483 }
2484
Mark Fasheh97b8f4a2010-08-13 15:15:19 -07002485 status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh,
2486 orphan_name, &orphan_dir,
2487 &di_blkno, &orphan_insert, &inode_ac);
Tao Mabc13d342009-08-18 11:44:14 +08002488 if (status < 0) {
2489 if (status != -ENOSPC)
2490 mlog_errno(status);
2491 goto leave;
2492 }
2493
2494 inode = ocfs2_get_init_inode(dir, mode);
2495 if (!inode) {
2496 status = -ENOMEM;
2497 mlog_errno(status);
2498 goto leave;
2499 }
2500
2501 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
2502 if (IS_ERR(handle)) {
2503 status = PTR_ERR(handle);
2504 handle = NULL;
2505 mlog_errno(status);
2506 goto leave;
2507 }
2508
Christoph Hellwig63936dd2010-03-03 09:05:01 -05002509 status = dquot_alloc_inode(inode);
2510 if (status)
Tao Mabc13d342009-08-18 11:44:14 +08002511 goto leave;
Tao Mabc13d342009-08-18 11:44:14 +08002512 did_quota_inode = 1;
2513
Mark Fasheh97b8f4a2010-08-13 15:15:19 -07002514 status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac,
2515 &suballoc_loc,
2516 &suballoc_bit, di_blkno);
Tao Mabc13d342009-08-18 11:44:14 +08002517 if (status < 0) {
2518 mlog_errno(status);
2519 goto leave;
2520 }
2521
Miklos Szeredi6d6b77f2011-10-28 14:13:28 +02002522 clear_nlink(inode);
Mark Fasheh97b8f4a2010-08-13 15:15:19 -07002523 /* do the real work now. */
2524 status = __ocfs2_mknod_locked(dir, inode,
2525 0, &new_di_bh, parent_di_bh, handle,
2526 inode_ac, di_blkno, suballoc_loc,
2527 suballoc_bit);
Tao Mabc13d342009-08-18 11:44:14 +08002528 if (status < 0) {
2529 mlog_errno(status);
2530 goto leave;
2531 }
2532
2533 di = (struct ocfs2_dinode *)new_di_bh->b_data;
Tristan Ye3939fda2010-03-19 09:21:09 +08002534 status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name,
Joseph Qi06ee5c72015-02-16 15:59:54 -08002535 &orphan_insert, orphan_dir, false);
Tao Mabc13d342009-08-18 11:44:14 +08002536 if (status < 0) {
2537 mlog_errno(status);
2538 goto leave;
2539 }
2540
2541 /* get open lock so that only nodes can't remove it from orphan dir. */
2542 status = ocfs2_open_lock(inode);
2543 if (status < 0)
2544 mlog_errno(status);
2545
Tao Mac7d260a2009-12-18 10:24:54 +08002546 insert_inode_hash(inode);
Tao Mabc13d342009-08-18 11:44:14 +08002547leave:
2548 if (status < 0 && did_quota_inode)
Christoph Hellwig63936dd2010-03-03 09:05:01 -05002549 dquot_free_inode(inode);
Tao Mabc13d342009-08-18 11:44:14 +08002550 if (handle)
2551 ocfs2_commit_trans(osb, handle);
2552
2553 if (orphan_dir) {
2554 /* This was locked for us in ocfs2_prepare_orphan_dir() */
2555 ocfs2_inode_unlock(orphan_dir, 1);
2556 mutex_unlock(&orphan_dir->i_mutex);
2557 iput(orphan_dir);
2558 }
2559
Tao Mabc13d342009-08-18 11:44:14 +08002560 if ((status < 0) && inode) {
2561 clear_nlink(inode);
2562 iput(inode);
2563 }
2564
2565 if (inode_ac)
2566 ocfs2_free_alloc_context(inode_ac);
2567
2568 brelse(new_di_bh);
2569
2570 if (!status)
2571 *new_inode = inode;
2572
2573 ocfs2_free_dir_lookup_result(&orphan_insert);
2574
2575 ocfs2_inode_unlock(dir, 1);
2576 brelse(parent_di_bh);
2577 return status;
2578}
2579
Joseph Qi48139622015-02-16 16:00:12 -08002580static int ocfs2_dio_orphan_recovered(struct inode *inode)
2581{
2582 int ret;
2583 struct buffer_head *di_bh = NULL;
2584 struct ocfs2_dinode *di = NULL;
2585
2586 ret = ocfs2_inode_lock(inode, &di_bh, 1);
2587 if (ret < 0) {
2588 mlog_errno(ret);
2589 return 0;
2590 }
2591
2592 di = (struct ocfs2_dinode *) di_bh->b_data;
2593 ret = !(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL));
2594 ocfs2_inode_unlock(inode, 1);
2595 brelse(di_bh);
2596
2597 return ret;
2598}
2599
2600#define OCFS2_DIO_ORPHANED_FL_CHECK_INTERVAL 10000
Joseph Qi06ee5c72015-02-16 15:59:54 -08002601int ocfs2_add_inode_to_orphan(struct ocfs2_super *osb,
2602 struct inode *inode)
2603{
2604 char orphan_name[OCFS2_DIO_ORPHAN_PREFIX_LEN + OCFS2_ORPHAN_NAMELEN + 1];
2605 struct inode *orphan_dir_inode = NULL;
2606 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
2607 struct buffer_head *di_bh = NULL;
2608 int status = 0;
2609 handle_t *handle = NULL;
Joseph Qi48139622015-02-16 16:00:12 -08002610 struct ocfs2_dinode *di = NULL;
Joseph Qi06ee5c72015-02-16 15:59:54 -08002611
Joseph Qi48139622015-02-16 16:00:12 -08002612restart:
Joseph Qi06ee5c72015-02-16 15:59:54 -08002613 status = ocfs2_inode_lock(inode, &di_bh, 1);
2614 if (status < 0) {
2615 mlog_errno(status);
2616 goto bail;
2617 }
2618
Joseph Qi48139622015-02-16 16:00:12 -08002619 di = (struct ocfs2_dinode *) di_bh->b_data;
2620 /*
2621 * Another append dio crashed?
2622 * If so, wait for recovery first.
2623 */
2624 if (unlikely(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL))) {
2625 ocfs2_inode_unlock(inode, 1);
2626 brelse(di_bh);
2627 wait_event_interruptible_timeout(OCFS2_I(inode)->append_dio_wq,
2628 ocfs2_dio_orphan_recovered(inode),
2629 msecs_to_jiffies(OCFS2_DIO_ORPHANED_FL_CHECK_INTERVAL));
2630 goto restart;
2631 }
2632
Joseph Qi06ee5c72015-02-16 15:59:54 -08002633 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir_inode,
2634 OCFS2_I(inode)->ip_blkno,
2635 orphan_name,
2636 &orphan_insert,
2637 true);
2638 if (status < 0) {
2639 mlog_errno(status);
2640 goto bail_unlock_inode;
2641 }
2642
2643 handle = ocfs2_start_trans(osb,
2644 OCFS2_INODE_ADD_TO_ORPHAN_CREDITS);
2645 if (IS_ERR(handle)) {
2646 status = PTR_ERR(handle);
2647 goto bail_unlock_orphan;
2648 }
2649
2650 status = ocfs2_orphan_add(osb, handle, inode, di_bh, orphan_name,
2651 &orphan_insert, orphan_dir_inode, true);
2652 if (status)
2653 mlog_errno(status);
2654
2655 ocfs2_commit_trans(osb, handle);
2656
2657bail_unlock_orphan:
2658 ocfs2_inode_unlock(orphan_dir_inode, 1);
2659 mutex_unlock(&orphan_dir_inode->i_mutex);
2660 iput(orphan_dir_inode);
2661
2662 ocfs2_free_dir_lookup_result(&orphan_insert);
2663
2664bail_unlock_inode:
2665 ocfs2_inode_unlock(inode, 1);
2666 brelse(di_bh);
2667
2668bail:
2669 return status;
2670}
2671
2672int ocfs2_del_inode_from_orphan(struct ocfs2_super *osb,
2673 struct inode *inode, int update_isize,
2674 loff_t end)
2675{
2676 struct inode *orphan_dir_inode = NULL;
2677 struct buffer_head *orphan_dir_bh = NULL;
2678 struct buffer_head *di_bh = NULL;
2679 struct ocfs2_dinode *di = NULL;
2680 handle_t *handle = NULL;
2681 int status = 0;
2682
2683 status = ocfs2_inode_lock(inode, &di_bh, 1);
2684 if (status < 0) {
2685 mlog_errno(status);
2686 goto bail;
2687 }
2688 di = (struct ocfs2_dinode *) di_bh->b_data;
2689
2690 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2691 ORPHAN_DIR_SYSTEM_INODE,
2692 le16_to_cpu(di->i_dio_orphaned_slot));
2693 if (!orphan_dir_inode) {
2694 status = -ENOENT;
2695 mlog_errno(status);
2696 goto bail_unlock_inode;
2697 }
2698
2699 mutex_lock(&orphan_dir_inode->i_mutex);
2700 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2701 if (status < 0) {
2702 mutex_unlock(&orphan_dir_inode->i_mutex);
2703 iput(orphan_dir_inode);
2704 mlog_errno(status);
2705 goto bail_unlock_inode;
2706 }
2707
2708 handle = ocfs2_start_trans(osb,
2709 OCFS2_INODE_DEL_FROM_ORPHAN_CREDITS);
2710 if (IS_ERR(handle)) {
2711 status = PTR_ERR(handle);
2712 goto bail_unlock_orphan;
2713 }
2714
2715 BUG_ON(!(di->i_flags & cpu_to_le32(OCFS2_DIO_ORPHANED_FL)));
2716
2717 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode,
2718 inode, orphan_dir_bh, true);
2719 if (status < 0) {
2720 mlog_errno(status);
2721 goto bail_commit;
2722 }
2723
2724 status = ocfs2_journal_access_di(handle,
2725 INODE_CACHE(inode),
2726 di_bh,
2727 OCFS2_JOURNAL_ACCESS_WRITE);
2728 if (status < 0) {
2729 mlog_errno(status);
2730 goto bail_commit;
2731 }
2732
2733 di->i_flags &= ~cpu_to_le32(OCFS2_DIO_ORPHANED_FL);
2734 di->i_dio_orphaned_slot = 0;
2735
2736 if (update_isize) {
2737 status = ocfs2_set_inode_size(handle, inode, di_bh, end);
2738 if (status)
2739 mlog_errno(status);
2740 } else
2741 ocfs2_journal_dirty(handle, di_bh);
2742
2743bail_commit:
2744 ocfs2_commit_trans(osb, handle);
2745
2746bail_unlock_orphan:
2747 ocfs2_inode_unlock(orphan_dir_inode, 1);
2748 mutex_unlock(&orphan_dir_inode->i_mutex);
2749 brelse(orphan_dir_bh);
2750 iput(orphan_dir_inode);
2751
2752bail_unlock_inode:
2753 ocfs2_inode_unlock(inode, 1);
2754 brelse(di_bh);
2755
2756bail:
2757 return status;
2758}
2759
Tao Mabc13d342009-08-18 11:44:14 +08002760int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
2761 struct inode *inode,
2762 struct dentry *dentry)
2763{
2764 int status = 0;
2765 struct buffer_head *parent_di_bh = NULL;
2766 handle_t *handle = NULL;
2767 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2768 struct ocfs2_dinode *dir_di, *di;
2769 struct inode *orphan_dir_inode = NULL;
2770 struct buffer_head *orphan_dir_bh = NULL;
2771 struct buffer_head *di_bh = NULL;
2772 struct ocfs2_dir_lookup_result lookup = { NULL, };
2773
Tao Ma8990e442011-02-23 22:45:26 +08002774 trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry,
2775 dentry->d_name.len, dentry->d_name.name,
2776 (unsigned long long)OCFS2_I(dir)->ip_blkno,
2777 (unsigned long long)OCFS2_I(inode)->ip_blkno);
Tao Mabc13d342009-08-18 11:44:14 +08002778
2779 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2780 if (status < 0) {
2781 if (status != -ENOENT)
2782 mlog_errno(status);
2783 return status;
2784 }
2785
2786 dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
2787 if (!dir_di->i_links_count) {
2788 /* can't make a file in a deleted directory. */
2789 status = -ENOENT;
2790 goto leave;
2791 }
2792
2793 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
2794 dentry->d_name.len);
2795 if (status)
2796 goto leave;
2797
2798 /* get a spot inside the dir. */
2799 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
2800 dentry->d_name.name,
2801 dentry->d_name.len, &lookup);
2802 if (status < 0) {
2803 mlog_errno(status);
2804 goto leave;
2805 }
2806
2807 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2808 ORPHAN_DIR_SYSTEM_INODE,
2809 osb->slot_num);
2810 if (!orphan_dir_inode) {
Joseph Qi62f8b1f2015-04-14 15:43:24 -07002811 status = -ENOENT;
Tao Mabc13d342009-08-18 11:44:14 +08002812 mlog_errno(status);
2813 goto leave;
2814 }
2815
2816 mutex_lock(&orphan_dir_inode->i_mutex);
2817
2818 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2819 if (status < 0) {
2820 mlog_errno(status);
2821 mutex_unlock(&orphan_dir_inode->i_mutex);
2822 iput(orphan_dir_inode);
2823 goto leave;
2824 }
2825
2826 status = ocfs2_read_inode_block(inode, &di_bh);
2827 if (status < 0) {
2828 mlog_errno(status);
2829 goto orphan_unlock;
2830 }
2831
2832 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
2833 if (IS_ERR(handle)) {
2834 status = PTR_ERR(handle);
2835 handle = NULL;
2836 mlog_errno(status);
2837 goto orphan_unlock;
2838 }
2839
2840 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
2841 di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
2842 if (status < 0) {
2843 mlog_errno(status);
2844 goto out_commit;
2845 }
2846
2847 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
Joseph Qi06ee5c72015-02-16 15:59:54 -08002848 orphan_dir_bh, false);
Tao Mabc13d342009-08-18 11:44:14 +08002849 if (status < 0) {
2850 mlog_errno(status);
2851 goto out_commit;
2852 }
2853
2854 di = (struct ocfs2_dinode *)di_bh->b_data;
Joseph Qi13eb9882013-07-03 15:00:48 -07002855 di->i_flags &= ~cpu_to_le32(OCFS2_ORPHANED_FL);
Tao Mabc13d342009-08-18 11:44:14 +08002856 di->i_orphaned_slot = 0;
Miklos Szeredibfe86842011-10-28 14:13:29 +02002857 set_nlink(inode, 1);
Tao Ma10cf1a02009-12-18 10:24:55 +08002858 ocfs2_set_links_count(di, inode->i_nlink);
Darrick J. Wong6fdb7022014-04-03 14:47:08 -07002859 ocfs2_update_inode_fsync_trans(handle, inode, 1);
Tao Mabc13d342009-08-18 11:44:14 +08002860 ocfs2_journal_dirty(handle, di_bh);
2861
2862 status = ocfs2_add_entry(handle, dentry, inode,
2863 OCFS2_I(inode)->ip_blkno, parent_di_bh,
2864 &lookup);
2865 if (status < 0) {
2866 mlog_errno(status);
2867 goto out_commit;
2868 }
2869
2870 status = ocfs2_dentry_attach_lock(dentry, inode,
2871 OCFS2_I(dir)->ip_blkno);
2872 if (status) {
2873 mlog_errno(status);
2874 goto out_commit;
2875 }
2876
Tao Mabc13d342009-08-18 11:44:14 +08002877 d_instantiate(dentry, inode);
2878 status = 0;
2879out_commit:
2880 ocfs2_commit_trans(osb, handle);
2881orphan_unlock:
2882 ocfs2_inode_unlock(orphan_dir_inode, 1);
2883 mutex_unlock(&orphan_dir_inode->i_mutex);
2884 iput(orphan_dir_inode);
2885leave:
2886
2887 ocfs2_inode_unlock(dir, 1);
2888
2889 brelse(di_bh);
2890 brelse(parent_di_bh);
2891 brelse(orphan_dir_bh);
2892
2893 ocfs2_free_dir_lookup_result(&lookup);
2894
Tao Mac1e8d352011-03-07 16:43:21 +08002895 if (status)
2896 mlog_errno(status);
Tao Mabc13d342009-08-18 11:44:14 +08002897
2898 return status;
2899}
2900
Arjan van de Ven92e1d5b2007-02-12 00:55:39 -08002901const struct inode_operations ocfs2_dir_iops = {
Mark Fashehccd979b2005-12-15 14:31:24 -08002902 .create = ocfs2_create,
2903 .lookup = ocfs2_lookup,
2904 .link = ocfs2_link,
2905 .unlink = ocfs2_unlink,
2906 .rmdir = ocfs2_unlink,
2907 .symlink = ocfs2_symlink,
2908 .mkdir = ocfs2_mkdir,
2909 .mknod = ocfs2_mknod,
2910 .rename = ocfs2_rename,
2911 .setattr = ocfs2_setattr,
2912 .getattr = ocfs2_getattr,
Tiger Yangd38eb8d2006-11-27 09:59:21 +08002913 .permission = ocfs2_permission,
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002914 .setxattr = generic_setxattr,
2915 .getxattr = generic_getxattr,
2916 .listxattr = ocfs2_listxattr,
2917 .removexattr = generic_removexattr,
Tristan Ye55f49462009-12-17 18:42:16 +08002918 .fiemap = ocfs2_fiemap,
Christoph Hellwig4e34e712011-07-23 17:37:31 +02002919 .get_acl = ocfs2_iop_get_acl,
Christoph Hellwig702e5bc2013-12-20 05:16:48 -08002920 .set_acl = ocfs2_iop_set_acl,
Mark Fashehccd979b2005-12-15 14:31:24 -08002921};