blob: be244692550db3e18cf05987ff577717e1f33173 [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,
Mark Fasheh4a12ca32008-11-12 15:43:34 -080082 struct ocfs2_dir_lookup_result *lookup);
Mark Fashehccd979b2005-12-15 14:31:24 -080083
84static int ocfs2_orphan_add(struct ocfs2_super *osb,
Mark Fasheh1fabe142006-10-09 18:11:45 -070085 handle_t *handle,
Mark Fashehccd979b2005-12-15 14:31:24 -080086 struct inode *inode,
Tristan Ye3939fda2010-03-19 09:21:09 +080087 struct buffer_head *fe_bh,
Mark Fashehccd979b2005-12-15 14:31:24 -080088 char *name,
Mark Fasheh4a12ca32008-11-12 15:43:34 -080089 struct ocfs2_dir_lookup_result *lookup,
Mark Fasheh5098c272006-10-05 18:12:57 -070090 struct inode *orphan_dir_inode);
Mark Fashehccd979b2005-12-15 14:31:24 -080091
92static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
Mark Fasheh1fabe142006-10-09 18:11:45 -070093 handle_t *handle,
Mark Fashehccd979b2005-12-15 14:31:24 -080094 struct inode *inode,
95 const char *symname);
96
Mark Fashehccd979b2005-12-15 14:31:24 -080097/* An orphan dir name is an 8 byte value, printed as a hex string */
98#define OCFS2_ORPHAN_NAMELEN ((int)(2 * sizeof(u64)))
99
100static struct dentry *ocfs2_lookup(struct inode *dir, struct dentry *dentry,
101 struct nameidata *nd)
102{
103 int status;
104 u64 blkno;
Mark Fashehccd979b2005-12-15 14:31:24 -0800105 struct inode *inode = NULL;
106 struct dentry *ret;
Mark Fashehccd979b2005-12-15 14:31:24 -0800107 struct ocfs2_inode_info *oi;
108
Tao Ma8990e442011-02-23 22:45:26 +0800109 trace_ocfs2_lookup(dir, dentry, dentry->d_name.len,
110 dentry->d_name.name,
111 (unsigned long long)OCFS2_I(dir)->ip_blkno, 0);
Mark Fashehccd979b2005-12-15 14:31:24 -0800112
113 if (dentry->d_name.len > OCFS2_MAX_FILENAME_LEN) {
114 ret = ERR_PTR(-ENAMETOOLONG);
115 goto bail;
116 }
117
Jan Karacb257972009-06-04 15:26:50 +0200118 status = ocfs2_inode_lock_nested(dir, NULL, 0, OI_LS_PARENT);
Mark Fashehccd979b2005-12-15 14:31:24 -0800119 if (status < 0) {
120 if (status != -ENOENT)
121 mlog_errno(status);
122 ret = ERR_PTR(status);
123 goto bail;
124 }
125
Mark Fashehbe94d112007-09-11 15:22:06 -0700126 status = ocfs2_lookup_ino_from_name(dir, dentry->d_name.name,
127 dentry->d_name.len, &blkno);
Mark Fashehccd979b2005-12-15 14:31:24 -0800128 if (status < 0)
129 goto bail_add;
130
Jan Kara5fa06132008-01-11 00:11:45 +0100131 inode = ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0);
Mark Fashehccd979b2005-12-15 14:31:24 -0800132 if (IS_ERR(inode)) {
Mark Fashehccd979b2005-12-15 14:31:24 -0800133 ret = ERR_PTR(-EACCES);
134 goto bail_unlock;
135 }
136
137 oi = OCFS2_I(inode);
138 /* Clear any orphaned state... If we were able to look up the
139 * inode from a directory, it certainly can't be orphaned. We
140 * might have the bad state from a node which intended to
141 * orphan this inode but crashed before it could commit the
142 * unlink. */
143 spin_lock(&oi->ip_lock);
144 oi->ip_flags &= ~OCFS2_INODE_MAYBE_ORPHANED;
Mark Fashehccd979b2005-12-15 14:31:24 -0800145 spin_unlock(&oi->ip_lock);
146
147bail_add:
Mark Fashehccd979b2005-12-15 14:31:24 -0800148 ret = d_splice_alias(inode, dentry);
149
Mark Fasheh379dfe92006-09-08 14:21:03 -0700150 if (inode) {
151 /*
152 * If d_splice_alias() finds a DCACHE_DISCONNECTED
153 * dentry, it will d_move() it on top of ourse. The
154 * return value will indicate this however, so in
155 * those cases, we switch them around for the locking
156 * code.
157 *
158 * NOTE: This dentry already has ->d_op set from
159 * ocfs2_get_parent() and ocfs2_get_dentry()
160 */
161 if (ret)
162 dentry = ret;
163
164 status = ocfs2_dentry_attach_lock(dentry, inode,
Mark Fasheh0027dd52006-09-21 16:51:28 -0700165 OCFS2_I(dir)->ip_blkno);
Mark Fasheh379dfe92006-09-08 14:21:03 -0700166 if (status) {
167 mlog_errno(status);
168 ret = ERR_PTR(status);
169 goto bail_unlock;
170 }
Goldwyn Rodrigues5e98d492010-06-28 10:04:32 -0500171 } else
172 ocfs2_dentry_attach_gen(dentry);
Mark Fasheh379dfe92006-09-08 14:21:03 -0700173
Mark Fashehccd979b2005-12-15 14:31:24 -0800174bail_unlock:
175 /* Don't drop the cluster lock until *after* the d_add --
176 * unlink on another node will message us to remove that
177 * dentry under this lock so otherwise we can race this with
Mark Fasheh34d024f2007-09-24 15:56:19 -0700178 * the downconvert thread and have a stale dentry. */
Mark Fashehe63aecb62007-10-18 15:30:42 -0700179 ocfs2_inode_unlock(dir, 0);
Mark Fashehccd979b2005-12-15 14:31:24 -0800180
181bail:
Mark Fashehccd979b2005-12-15 14:31:24 -0800182
Tao Ma8990e442011-02-23 22:45:26 +0800183 trace_ocfs2_lookup_ret(ret);
Mark Fashehccd979b2005-12-15 14:31:24 -0800184
185 return ret;
186}
187
Al Viro67697cb2011-07-26 02:55:32 -0400188static struct inode *ocfs2_get_init_inode(struct inode *dir, umode_t mode)
Tiger Yangf5d36202008-11-14 11:15:44 +0800189{
190 struct inode *inode;
191
192 inode = new_inode(dir->i_sb);
193 if (!inode) {
194 mlog(ML_ERROR, "new_inode failed!\n");
195 return NULL;
196 }
197
198 /* populate as many fields early on as possible - many of
199 * these are used by the support functions here and in
200 * callers. */
201 if (S_ISDIR(mode))
Miklos Szeredibfe86842011-10-28 14:13:29 +0200202 set_nlink(inode, 2);
Dmitry Monakhov75fe0a22010-03-04 17:32:16 +0300203 inode_init_owner(inode, dir, mode);
Christoph Hellwig871a2932010-03-03 09:05:07 -0500204 dquot_initialize(inode);
Tiger Yangf5d36202008-11-14 11:15:44 +0800205 return inode;
206}
207
Mark Fashehccd979b2005-12-15 14:31:24 -0800208static int ocfs2_mknod(struct inode *dir,
209 struct dentry *dentry,
Al Viro1a67aaf2011-07-26 01:52:52 -0400210 umode_t mode,
Mark Fashehccd979b2005-12-15 14:31:24 -0800211 dev_t dev)
212{
213 int status = 0;
214 struct buffer_head *parent_fe_bh = NULL;
Mark Fasheh1fabe142006-10-09 18:11:45 -0700215 handle_t *handle = NULL;
Mark Fashehccd979b2005-12-15 14:31:24 -0800216 struct ocfs2_super *osb;
217 struct ocfs2_dinode *dirfe;
218 struct buffer_head *new_fe_bh = NULL;
Mark Fashehccd979b2005-12-15 14:31:24 -0800219 struct inode *inode = NULL;
220 struct ocfs2_alloc_context *inode_ac = NULL;
221 struct ocfs2_alloc_context *data_ac = NULL;
Mark Fasheh9b7895e2008-11-12 16:27:44 -0800222 struct ocfs2_alloc_context *meta_ac = NULL;
Tiger Yang534eadd2008-11-14 11:16:41 +0800223 int want_clusters = 0;
Mark Fasheh9b7895e2008-11-12 16:27:44 -0800224 int want_meta = 0;
Tiger Yang534eadd2008-11-14 11:16:41 +0800225 int xattr_credits = 0;
226 struct ocfs2_security_xattr_info si = {
227 .enable = 1,
228 };
Jan Karaa90714c2008-10-09 19:38:40 +0200229 int did_quota_inode = 0;
Mark Fasheh4a12ca32008-11-12 15:43:34 -0800230 struct ocfs2_dir_lookup_result lookup = { NULL, };
Joel Becker547ba7c2010-05-10 11:56:52 -0700231 sigset_t oldset;
232 int did_block_signals = 0;
Mark Fashehccd979b2005-12-15 14:31:24 -0800233
Tao Ma8990e442011-02-23 22:45:26 +0800234 trace_ocfs2_mknod(dir, dentry, dentry->d_name.len, dentry->d_name.name,
235 (unsigned long long)OCFS2_I(dir)->ip_blkno,
236 (unsigned long)dev, mode);
Mark Fashehccd979b2005-12-15 14:31:24 -0800237
Christoph Hellwig871a2932010-03-03 09:05:07 -0500238 dquot_initialize(dir);
Christoph Hellwig907f4552010-03-03 09:05:06 -0500239
Mark Fashehccd979b2005-12-15 14:31:24 -0800240 /* get our super block */
241 osb = OCFS2_SB(dir->i_sb);
242
Mark Fashehe63aecb62007-10-18 15:30:42 -0700243 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
Mark Fashehe3a82132006-10-05 16:04:17 -0700244 if (status < 0) {
245 if (status != -ENOENT)
246 mlog_errno(status);
247 return status;
248 }
249
Mark Fasheh198a1ca2008-11-20 17:54:57 -0800250 if (S_ISDIR(mode) && (dir->i_nlink >= ocfs2_link_max(osb))) {
Mark Fasheha663e302006-08-09 11:45:07 -0700251 status = -EMLINK;
252 goto leave;
253 }
254
Mark Fashehccd979b2005-12-15 14:31:24 -0800255 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
Mark Fasheh198a1ca2008-11-20 17:54:57 -0800256 if (!ocfs2_read_links_count(dirfe)) {
Mark Fashehccd979b2005-12-15 14:31:24 -0800257 /* can't make a file in a deleted directory. */
258 status = -ENOENT;
259 goto leave;
260 }
261
262 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
263 dentry->d_name.len);
264 if (status)
265 goto leave;
266
267 /* get a spot inside the dir. */
268 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
269 dentry->d_name.name,
Mark Fasheh4a12ca32008-11-12 15:43:34 -0800270 dentry->d_name.len, &lookup);
Mark Fashehccd979b2005-12-15 14:31:24 -0800271 if (status < 0) {
272 mlog_errno(status);
273 goto leave;
274 }
275
276 /* reserve an inode spot */
Mark Fashehda5cbf22006-10-06 18:34:35 -0700277 status = ocfs2_reserve_new_inode(osb, &inode_ac);
Mark Fashehccd979b2005-12-15 14:31:24 -0800278 if (status < 0) {
279 if (status != -ENOSPC)
280 mlog_errno(status);
281 goto leave;
282 }
283
Tiger Yangf5d36202008-11-14 11:15:44 +0800284 inode = ocfs2_get_init_inode(dir, mode);
285 if (!inode) {
286 status = -ENOMEM;
287 mlog_errno(status);
288 goto leave;
289 }
290
Tiger Yang534eadd2008-11-14 11:16:41 +0800291 /* get security xattr */
Eric Paris2a7dba32011-02-01 11:05:39 -0500292 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
Tiger Yang534eadd2008-11-14 11:16:41 +0800293 if (status) {
294 if (status == -EOPNOTSUPP)
295 si.enable = 0;
296 else {
297 mlog_errno(status);
Mark Fashehccd979b2005-12-15 14:31:24 -0800298 goto leave;
299 }
300 }
301
Tiger Yang89c38bd2008-11-14 11:17:41 +0800302 /* calculate meta data/clusters for setting security and acl xattr */
303 status = ocfs2_calc_xattr_init(dir, parent_fe_bh, mode,
Mark Fasheh9b7895e2008-11-12 16:27:44 -0800304 &si, &want_clusters,
305 &xattr_credits, &want_meta);
Tiger Yang89c38bd2008-11-14 11:17:41 +0800306 if (status < 0) {
307 mlog_errno(status);
308 goto leave;
Tiger Yang534eadd2008-11-14 11:16:41 +0800309 }
310
311 /* Reserve a cluster if creating an extent based directory. */
Mark Fasheh9b7895e2008-11-12 16:27:44 -0800312 if (S_ISDIR(mode) && !ocfs2_supports_inline_data(osb)) {
Tiger Yang534eadd2008-11-14 11:16:41 +0800313 want_clusters += 1;
314
Mark Fasheh9b7895e2008-11-12 16:27:44 -0800315 /* Dir indexing requires extra space as well */
Mark Fasheh4ed8a6b2008-11-24 17:02:08 -0800316 if (ocfs2_supports_indexed_dirs(osb))
Mark Fasheh9b7895e2008-11-12 16:27:44 -0800317 want_meta++;
Mark Fasheh9b7895e2008-11-12 16:27:44 -0800318 }
319
320 status = ocfs2_reserve_new_metadata_blocks(osb, want_meta, &meta_ac);
321 if (status < 0) {
322 if (status != -ENOSPC)
323 mlog_errno(status);
324 goto leave;
325 }
326
Tiger Yang534eadd2008-11-14 11:16:41 +0800327 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
328 if (status < 0) {
329 if (status != -ENOSPC)
330 mlog_errno(status);
331 goto leave;
332 }
333
Mark Fasheh9b7895e2008-11-12 16:27:44 -0800334 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb,
335 S_ISDIR(mode),
336 xattr_credits));
Mark Fashehccd979b2005-12-15 14:31:24 -0800337 if (IS_ERR(handle)) {
338 status = PTR_ERR(handle);
339 handle = NULL;
340 mlog_errno(status);
341 goto leave;
342 }
343
Joel Becker547ba7c2010-05-10 11:56:52 -0700344 /* Starting to change things, restart is no longer possible. */
345 ocfs2_block_signals(&oldset);
346 did_block_signals = 1;
347
Christoph Hellwig63936dd2010-03-03 09:05:01 -0500348 status = dquot_alloc_inode(inode);
349 if (status)
Jan Karaa90714c2008-10-09 19:38:40 +0200350 goto leave;
Jan Karaa90714c2008-10-09 19:38:40 +0200351 did_quota_inode = 1;
352
Mark Fashehccd979b2005-12-15 14:31:24 -0800353 /* do the real work now. */
Tao Ma19bd3412009-08-18 11:44:10 +0800354 status = ocfs2_mknod_locked(osb, dir, inode, dev,
Mark Fashehccd979b2005-12-15 14:31:24 -0800355 &new_fe_bh, parent_fe_bh, handle,
Tiger Yangf5d36202008-11-14 11:15:44 +0800356 inode_ac);
Mark Fashehccd979b2005-12-15 14:31:24 -0800357 if (status < 0) {
358 mlog_errno(status);
359 goto leave;
360 }
361
362 if (S_ISDIR(mode)) {
363 status = ocfs2_fill_new_dir(osb, handle, dir, inode,
Mark Fasheh9b7895e2008-11-12 16:27:44 -0800364 new_fe_bh, data_ac, meta_ac);
Mark Fashehccd979b2005-12-15 14:31:24 -0800365 if (status < 0) {
366 mlog_errno(status);
367 goto leave;
368 }
369
Joel Becker0cf2f762009-02-12 16:41:25 -0800370 status = ocfs2_journal_access_di(handle, INODE_CACHE(dir),
371 parent_fe_bh,
Joel Becker13723d02008-10-17 19:25:01 -0700372 OCFS2_JOURNAL_ACCESS_WRITE);
Mark Fashehccd979b2005-12-15 14:31:24 -0800373 if (status < 0) {
374 mlog_errno(status);
375 goto leave;
376 }
Mark Fasheh198a1ca2008-11-20 17:54:57 -0800377 ocfs2_add_links_count(dirfe, 1);
Joel Beckerec20cec2010-03-19 14:13:52 -0700378 ocfs2_journal_dirty(handle, parent_fe_bh);
Dave Hansend8c76e62006-09-30 23:29:04 -0700379 inc_nlink(dir);
Mark Fashehccd979b2005-12-15 14:31:24 -0800380 }
381
Tiger Yang89c38bd2008-11-14 11:17:41 +0800382 status = ocfs2_init_acl(handle, inode, dir, new_fe_bh, parent_fe_bh,
Mark Fasheh9b7895e2008-11-12 16:27:44 -0800383 meta_ac, data_ac);
Tiger Yang89c38bd2008-11-14 11:17:41 +0800384 if (status < 0) {
385 mlog_errno(status);
386 goto leave;
387 }
388
Tiger Yang534eadd2008-11-14 11:16:41 +0800389 if (si.enable) {
390 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
Mark Fasheh9b7895e2008-11-12 16:27:44 -0800391 meta_ac, data_ac);
Tiger Yang534eadd2008-11-14 11:16:41 +0800392 if (status < 0) {
393 mlog_errno(status);
394 goto leave;
395 }
396 }
397
Mark Fasheha9743fc2010-04-23 11:42:22 -0700398 /*
399 * Do this before adding the entry to the directory. We add
400 * also set d_op after success so that ->d_iput() will cleanup
401 * the dentry lock even if ocfs2_add_entry() fails below.
402 */
403 status = ocfs2_dentry_attach_lock(dentry, inode,
404 OCFS2_I(dir)->ip_blkno);
405 if (status) {
406 mlog_errno(status);
407 goto leave;
408 }
Mark Fasheha9743fc2010-04-23 11:42:22 -0700409
Mark Fashehccd979b2005-12-15 14:31:24 -0800410 status = ocfs2_add_entry(handle, dentry, inode,
411 OCFS2_I(inode)->ip_blkno, parent_fe_bh,
Mark Fasheh4a12ca32008-11-12 15:43:34 -0800412 &lookup);
Mark Fashehccd979b2005-12-15 14:31:24 -0800413 if (status < 0) {
414 mlog_errno(status);
415 goto leave;
416 }
417
418 insert_inode_hash(inode);
Mark Fashehccd979b2005-12-15 14:31:24 -0800419 d_instantiate(dentry, inode);
420 status = 0;
421leave:
Jan Karaa90714c2008-10-09 19:38:40 +0200422 if (status < 0 && did_quota_inode)
Christoph Hellwig63936dd2010-03-03 09:05:01 -0500423 dquot_free_inode(inode);
Mark Fashehccd979b2005-12-15 14:31:24 -0800424 if (handle)
Mark Fasheh02dc1af2006-10-09 16:48:10 -0700425 ocfs2_commit_trans(osb, handle);
Mark Fashehccd979b2005-12-15 14:31:24 -0800426
Mark Fashehe63aecb62007-10-18 15:30:42 -0700427 ocfs2_inode_unlock(dir, 1);
Joel Becker547ba7c2010-05-10 11:56:52 -0700428 if (did_block_signals)
429 ocfs2_unblock_signals(&oldset);
Mark Fashehe3a82132006-10-05 16:04:17 -0700430
Mark Fasheha81cb882008-10-07 14:25:16 -0700431 brelse(new_fe_bh);
Mark Fasheha81cb882008-10-07 14:25:16 -0700432 brelse(parent_fe_bh);
Tiger Yang534eadd2008-11-14 11:16:41 +0800433 kfree(si.name);
434 kfree(si.value);
Mark Fashehccd979b2005-12-15 14:31:24 -0800435
Mark Fasheh4a12ca32008-11-12 15:43:34 -0800436 ocfs2_free_dir_lookup_result(&lookup);
437
Mark Fashehccd979b2005-12-15 14:31:24 -0800438 if (inode_ac)
439 ocfs2_free_alloc_context(inode_ac);
440
441 if (data_ac)
442 ocfs2_free_alloc_context(data_ac);
443
Mark Fasheh9b7895e2008-11-12 16:27:44 -0800444 if (meta_ac)
445 ocfs2_free_alloc_context(meta_ac);
Tiger Yang534eadd2008-11-14 11:16:41 +0800446
Li Dongyang062d3402010-04-22 16:11:29 +0800447 /*
448 * We should call iput after the i_mutex of the bitmap been
449 * unlocked in ocfs2_free_alloc_context, or the
450 * ocfs2_delete_inode will mutex_lock again.
451 */
452 if ((status < 0) && inode) {
453 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
454 clear_nlink(inode);
455 iput(inode);
456 }
457
Tao Mac1e8d352011-03-07 16:43:21 +0800458 if (status)
459 mlog_errno(status);
Mark Fashehccd979b2005-12-15 14:31:24 -0800460
461 return status;
462}
463
Mark Fasheh021960c2010-08-13 15:15:15 -0700464static int __ocfs2_mknod_locked(struct inode *dir,
465 struct inode *inode,
466 dev_t dev,
467 struct buffer_head **new_fe_bh,
468 struct buffer_head *parent_fe_bh,
469 handle_t *handle,
470 struct ocfs2_alloc_context *inode_ac,
471 u64 fe_blkno, u64 suballoc_loc, u16 suballoc_bit)
Mark Fashehccd979b2005-12-15 14:31:24 -0800472{
473 int status = 0;
Mark Fasheh021960c2010-08-13 15:15:15 -0700474 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
Mark Fashehccd979b2005-12-15 14:31:24 -0800475 struct ocfs2_dinode *fe = NULL;
476 struct ocfs2_extent_list *fel;
Mark Fasheh9b7895e2008-11-12 16:27:44 -0800477 u16 feat;
Mark Fashehccd979b2005-12-15 14:31:24 -0800478
Mark Fashehccd979b2005-12-15 14:31:24 -0800479 *new_fe_bh = NULL;
Mark Fashehccd979b2005-12-15 14:31:24 -0800480
Mark Fashehccd979b2005-12-15 14:31:24 -0800481 /* populate as many fields early on as possible - many of
482 * these are used by the support functions here and in
483 * callers. */
484 inode->i_ino = ino_from_blkno(osb->sb, fe_blkno);
485 OCFS2_I(inode)->ip_blkno = fe_blkno;
Mark Fashehccd979b2005-12-15 14:31:24 -0800486 spin_lock(&osb->osb_lock);
487 inode->i_generation = osb->s_next_generation++;
488 spin_unlock(&osb->osb_lock);
489
490 *new_fe_bh = sb_getblk(osb->sb, fe_blkno);
491 if (!*new_fe_bh) {
492 status = -EIO;
493 mlog_errno(status);
494 goto leave;
495 }
Joel Becker8cb471e2009-02-10 20:00:41 -0800496 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode), *new_fe_bh);
Mark Fashehccd979b2005-12-15 14:31:24 -0800497
Joel Becker0cf2f762009-02-12 16:41:25 -0800498 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
499 *new_fe_bh,
Joel Becker13723d02008-10-17 19:25:01 -0700500 OCFS2_JOURNAL_ACCESS_CREATE);
Mark Fashehccd979b2005-12-15 14:31:24 -0800501 if (status < 0) {
502 mlog_errno(status);
503 goto leave;
504 }
505
506 fe = (struct ocfs2_dinode *) (*new_fe_bh)->b_data;
507 memset(fe, 0, osb->sb->s_blocksize);
508
509 fe->i_generation = cpu_to_le32(inode->i_generation);
510 fe->i_fs_generation = cpu_to_le32(osb->fs_generation);
511 fe->i_blkno = cpu_to_le64(fe_blkno);
Joel Becker2b6cb572010-03-26 10:09:15 +0800512 fe->i_suballoc_loc = cpu_to_le64(suballoc_loc);
Mark Fashehccd979b2005-12-15 14:31:24 -0800513 fe->i_suballoc_bit = cpu_to_le16(suballoc_bit);
Tao Ma4d0ddb22008-03-05 16:11:46 +0800514 fe->i_suballoc_slot = cpu_to_le16(inode_ac->ac_alloc_slot);
Tiger Yangf5d36202008-11-14 11:15:44 +0800515 fe->i_uid = cpu_to_le32(inode->i_uid);
516 fe->i_gid = cpu_to_le32(inode->i_gid);
517 fe->i_mode = cpu_to_le16(inode->i_mode);
518 if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode))
Mark Fashehccd979b2005-12-15 14:31:24 -0800519 fe->id1.dev1.i_rdev = cpu_to_le64(huge_encode_dev(dev));
Mark Fasheh198a1ca2008-11-20 17:54:57 -0800520
521 ocfs2_set_links_count(fe, inode->i_nlink);
Mark Fashehccd979b2005-12-15 14:31:24 -0800522
523 fe->i_last_eb_blk = 0;
524 strcpy(fe->i_signature, OCFS2_INODE_SIGNATURE);
525 le32_add_cpu(&fe->i_flags, OCFS2_VALID_FL);
526 fe->i_atime = fe->i_ctime = fe->i_mtime =
527 cpu_to_le64(CURRENT_TIME.tv_sec);
528 fe->i_mtime_nsec = fe->i_ctime_nsec = fe->i_atime_nsec =
529 cpu_to_le32(CURRENT_TIME.tv_nsec);
530 fe->i_dtime = 0;
531
Mark Fasheh5b6a3a22007-09-13 16:33:54 -0700532 /*
Mark Fasheh9b7895e2008-11-12 16:27:44 -0800533 * If supported, directories start with inline data. If inline
534 * isn't supported, but indexing is, we start them as indexed.
Mark Fasheh5b6a3a22007-09-13 16:33:54 -0700535 */
Mark Fasheh9b7895e2008-11-12 16:27:44 -0800536 feat = le16_to_cpu(fe->i_dyn_features);
Tiger Yangf5d36202008-11-14 11:15:44 +0800537 if (S_ISDIR(inode->i_mode) && ocfs2_supports_inline_data(osb)) {
Mark Fasheh5b6a3a22007-09-13 16:33:54 -0700538 fe->i_dyn_features = cpu_to_le16(feat | OCFS2_INLINE_DATA_FL);
539
Tiger Yangd9ae49d2009-03-05 11:06:15 +0800540 fe->id2.i_data.id_count = cpu_to_le16(
541 ocfs2_max_inline_data_with_xattr(osb->sb, fe));
Mark Fasheh5b6a3a22007-09-13 16:33:54 -0700542 } else {
543 fel = &fe->id2.i_list;
544 fel->l_tree_depth = 0;
545 fel->l_next_free_rec = 0;
546 fel->l_count = cpu_to_le16(ocfs2_extent_recs_per_inode(osb->sb));
547 }
Mark Fashehccd979b2005-12-15 14:31:24 -0800548
Joel Beckerec20cec2010-03-19 14:13:52 -0700549 ocfs2_journal_dirty(handle, *new_fe_bh);
Mark Fashehccd979b2005-12-15 14:31:24 -0800550
Joel Beckerb657c952008-11-13 14:49:11 -0800551 ocfs2_populate_inode(inode, fe, 1);
Joel Becker0cf2f762009-02-12 16:41:25 -0800552 ocfs2_ci_set_new(osb, INODE_CACHE(inode));
Sunil Mushranc271c5c2006-12-05 17:56:35 -0800553 if (!ocfs2_mount_local(osb)) {
554 status = ocfs2_create_new_inode_locks(inode);
555 if (status < 0)
556 mlog_errno(status);
557 }
Mark Fashehccd979b2005-12-15 14:31:24 -0800558
559 status = 0; /* error in ocfs2_create_new_inode_locks is not
560 * critical */
561
Mark Fashehccd979b2005-12-15 14:31:24 -0800562leave:
563 if (status < 0) {
564 if (*new_fe_bh) {
565 brelse(*new_fe_bh);
566 *new_fe_bh = NULL;
567 }
Mark Fashehccd979b2005-12-15 14:31:24 -0800568 }
569
Tao Mac1e8d352011-03-07 16:43:21 +0800570 if (status)
571 mlog_errno(status);
Mark Fashehccd979b2005-12-15 14:31:24 -0800572 return status;
573}
574
Mark Fasheh021960c2010-08-13 15:15:15 -0700575static int ocfs2_mknod_locked(struct ocfs2_super *osb,
576 struct inode *dir,
577 struct inode *inode,
578 dev_t dev,
579 struct buffer_head **new_fe_bh,
580 struct buffer_head *parent_fe_bh,
581 handle_t *handle,
582 struct ocfs2_alloc_context *inode_ac)
583{
584 int status = 0;
585 u64 suballoc_loc, fe_blkno = 0;
586 u16 suballoc_bit;
587
588 *new_fe_bh = NULL;
589
590 status = ocfs2_claim_new_inode(handle, dir, parent_fe_bh,
591 inode_ac, &suballoc_loc,
592 &suballoc_bit, &fe_blkno);
593 if (status < 0) {
594 mlog_errno(status);
595 return status;
596 }
597
598 return __ocfs2_mknod_locked(dir, inode, dev, new_fe_bh,
599 parent_fe_bh, handle, inode_ac,
600 fe_blkno, suballoc_loc, suballoc_bit);
601}
602
Mark Fashehccd979b2005-12-15 14:31:24 -0800603static int ocfs2_mkdir(struct inode *dir,
604 struct dentry *dentry,
Al Viro18bb1db2011-07-26 01:41:39 -0400605 umode_t mode)
Mark Fashehccd979b2005-12-15 14:31:24 -0800606{
607 int ret;
608
Tao Ma8990e442011-02-23 22:45:26 +0800609 trace_ocfs2_mkdir(dir, dentry, dentry->d_name.len, dentry->d_name.name,
610 OCFS2_I(dir)->ip_blkno, mode);
Mark Fashehccd979b2005-12-15 14:31:24 -0800611 ret = ocfs2_mknod(dir, dentry, mode | S_IFDIR, 0);
Tao Mac1e8d352011-03-07 16:43:21 +0800612 if (ret)
613 mlog_errno(ret);
Mark Fashehccd979b2005-12-15 14:31:24 -0800614
615 return ret;
616}
617
618static int ocfs2_create(struct inode *dir,
619 struct dentry *dentry,
Al Viro4acdaf22011-07-26 01:42:34 -0400620 umode_t mode,
Mark Fashehccd979b2005-12-15 14:31:24 -0800621 struct nameidata *nd)
622{
623 int ret;
624
Tao Ma8990e442011-02-23 22:45:26 +0800625 trace_ocfs2_create(dir, dentry, dentry->d_name.len, dentry->d_name.name,
626 (unsigned long long)OCFS2_I(dir)->ip_blkno, mode);
Mark Fashehccd979b2005-12-15 14:31:24 -0800627 ret = ocfs2_mknod(dir, dentry, mode | S_IFREG, 0);
Tao Mac1e8d352011-03-07 16:43:21 +0800628 if (ret)
629 mlog_errno(ret);
Mark Fashehccd979b2005-12-15 14:31:24 -0800630
631 return ret;
632}
633
634static int ocfs2_link(struct dentry *old_dentry,
635 struct inode *dir,
636 struct dentry *dentry)
637{
Mark Fasheh1fabe142006-10-09 18:11:45 -0700638 handle_t *handle;
Mark Fashehccd979b2005-12-15 14:31:24 -0800639 struct inode *inode = old_dentry->d_inode;
640 int err;
641 struct buffer_head *fe_bh = NULL;
642 struct buffer_head *parent_fe_bh = NULL;
Mark Fashehccd979b2005-12-15 14:31:24 -0800643 struct ocfs2_dinode *fe = NULL;
644 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
Mark Fasheh4a12ca32008-11-12 15:43:34 -0800645 struct ocfs2_dir_lookup_result lookup = { NULL, };
Joel Becker547ba7c2010-05-10 11:56:52 -0700646 sigset_t oldset;
Mark Fashehccd979b2005-12-15 14:31:24 -0800647
Tao Ma8990e442011-02-23 22:45:26 +0800648 trace_ocfs2_link((unsigned long long)OCFS2_I(inode)->ip_blkno,
649 old_dentry->d_name.len, old_dentry->d_name.name,
650 dentry->d_name.len, dentry->d_name.name);
Mark Fashehccd979b2005-12-15 14:31:24 -0800651
Mark Fasheh123a9642006-10-05 16:48:23 -0700652 if (S_ISDIR(inode->i_mode))
653 return -EPERM;
Mark Fashehccd979b2005-12-15 14:31:24 -0800654
Christoph Hellwig871a2932010-03-03 09:05:07 -0500655 dquot_initialize(dir);
Christoph Hellwig907f4552010-03-03 09:05:06 -0500656
Jan Karacb257972009-06-04 15:26:50 +0200657 err = ocfs2_inode_lock_nested(dir, &parent_fe_bh, 1, OI_LS_PARENT);
Mark Fashehccd979b2005-12-15 14:31:24 -0800658 if (err < 0) {
659 if (err != -ENOENT)
660 mlog_errno(err);
Mark Fasheh123a9642006-10-05 16:48:23 -0700661 return err;
Mark Fashehccd979b2005-12-15 14:31:24 -0800662 }
663
Tiger Yang0f62de22006-08-31 20:39:47 -0700664 if (!dir->i_nlink) {
665 err = -ENOENT;
Mark Fasheh123a9642006-10-05 16:48:23 -0700666 goto out;
Tiger Yang0f62de22006-08-31 20:39:47 -0700667 }
668
Mark Fashehccd979b2005-12-15 14:31:24 -0800669 err = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
670 dentry->d_name.len);
671 if (err)
Mark Fasheh123a9642006-10-05 16:48:23 -0700672 goto out;
Mark Fashehccd979b2005-12-15 14:31:24 -0800673
674 err = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
675 dentry->d_name.name,
Mark Fasheh4a12ca32008-11-12 15:43:34 -0800676 dentry->d_name.len, &lookup);
Mark Fashehccd979b2005-12-15 14:31:24 -0800677 if (err < 0) {
678 mlog_errno(err);
Mark Fasheh123a9642006-10-05 16:48:23 -0700679 goto out;
Mark Fashehccd979b2005-12-15 14:31:24 -0800680 }
681
Mark Fashehe63aecb62007-10-18 15:30:42 -0700682 err = ocfs2_inode_lock(inode, &fe_bh, 1);
Mark Fashehccd979b2005-12-15 14:31:24 -0800683 if (err < 0) {
684 if (err != -ENOENT)
685 mlog_errno(err);
Mark Fasheh123a9642006-10-05 16:48:23 -0700686 goto out;
Mark Fashehccd979b2005-12-15 14:31:24 -0800687 }
688
689 fe = (struct ocfs2_dinode *) fe_bh->b_data;
Mark Fasheh198a1ca2008-11-20 17:54:57 -0800690 if (ocfs2_read_links_count(fe) >= ocfs2_link_max(osb)) {
Mark Fashehccd979b2005-12-15 14:31:24 -0800691 err = -EMLINK;
Mark Fasheh123a9642006-10-05 16:48:23 -0700692 goto out_unlock_inode;
Mark Fashehccd979b2005-12-15 14:31:24 -0800693 }
694
Jan Karaa90714c2008-10-09 19:38:40 +0200695 handle = ocfs2_start_trans(osb, ocfs2_link_credits(osb->sb));
Mark Fashehccd979b2005-12-15 14:31:24 -0800696 if (IS_ERR(handle)) {
697 err = PTR_ERR(handle);
698 handle = NULL;
699 mlog_errno(err);
Mark Fasheh123a9642006-10-05 16:48:23 -0700700 goto out_unlock_inode;
Mark Fashehccd979b2005-12-15 14:31:24 -0800701 }
702
Joel Becker547ba7c2010-05-10 11:56:52 -0700703 /* Starting to change things, restart is no longer possible. */
704 ocfs2_block_signals(&oldset);
705
Joel Becker0cf2f762009-02-12 16:41:25 -0800706 err = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
Joel Becker13723d02008-10-17 19:25:01 -0700707 OCFS2_JOURNAL_ACCESS_WRITE);
Mark Fashehccd979b2005-12-15 14:31:24 -0800708 if (err < 0) {
709 mlog_errno(err);
Mark Fasheh123a9642006-10-05 16:48:23 -0700710 goto out_commit;
Mark Fashehccd979b2005-12-15 14:31:24 -0800711 }
712
Dave Hansend8c76e62006-09-30 23:29:04 -0700713 inc_nlink(inode);
Mark Fashehccd979b2005-12-15 14:31:24 -0800714 inode->i_ctime = CURRENT_TIME;
Mark Fasheh198a1ca2008-11-20 17:54:57 -0800715 ocfs2_set_links_count(fe, inode->i_nlink);
Mark Fashehccd979b2005-12-15 14:31:24 -0800716 fe->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
717 fe->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
Joel Beckerec20cec2010-03-19 14:13:52 -0700718 ocfs2_journal_dirty(handle, fe_bh);
Mark Fashehccd979b2005-12-15 14:31:24 -0800719
720 err = ocfs2_add_entry(handle, dentry, inode,
721 OCFS2_I(inode)->ip_blkno,
Mark Fasheh4a12ca32008-11-12 15:43:34 -0800722 parent_fe_bh, &lookup);
Mark Fashehccd979b2005-12-15 14:31:24 -0800723 if (err) {
Mark Fasheh198a1ca2008-11-20 17:54:57 -0800724 ocfs2_add_links_count(fe, -1);
Dave Hansen9a53c3a2006-09-30 23:29:03 -0700725 drop_nlink(inode);
Mark Fashehccd979b2005-12-15 14:31:24 -0800726 mlog_errno(err);
Mark Fasheh123a9642006-10-05 16:48:23 -0700727 goto out_commit;
Mark Fashehccd979b2005-12-15 14:31:24 -0800728 }
729
Mark Fasheh0027dd52006-09-21 16:51:28 -0700730 err = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
Mark Fasheh379dfe92006-09-08 14:21:03 -0700731 if (err) {
732 mlog_errno(err);
Mark Fasheh123a9642006-10-05 16:48:23 -0700733 goto out_commit;
Mark Fasheh379dfe92006-09-08 14:21:03 -0700734 }
735
Al Viro7de9c6ee2010-10-23 11:11:40 -0400736 ihold(inode);
Mark Fashehccd979b2005-12-15 14:31:24 -0800737 d_instantiate(dentry, inode);
Mark Fasheh123a9642006-10-05 16:48:23 -0700738
739out_commit:
Mark Fasheh02dc1af2006-10-09 16:48:10 -0700740 ocfs2_commit_trans(osb, handle);
Joel Becker547ba7c2010-05-10 11:56:52 -0700741 ocfs2_unblock_signals(&oldset);
Mark Fasheh123a9642006-10-05 16:48:23 -0700742out_unlock_inode:
Mark Fashehe63aecb62007-10-18 15:30:42 -0700743 ocfs2_inode_unlock(inode, 1);
Mark Fasheh123a9642006-10-05 16:48:23 -0700744
745out:
Mark Fashehe63aecb62007-10-18 15:30:42 -0700746 ocfs2_inode_unlock(dir, 1);
Mark Fasheh123a9642006-10-05 16:48:23 -0700747
Mark Fasheha81cb882008-10-07 14:25:16 -0700748 brelse(fe_bh);
749 brelse(parent_fe_bh);
Mark Fashehccd979b2005-12-15 14:31:24 -0800750
Mark Fasheh4a12ca32008-11-12 15:43:34 -0800751 ocfs2_free_dir_lookup_result(&lookup);
752
Tao Mac1e8d352011-03-07 16:43:21 +0800753 if (err)
754 mlog_errno(err);
Mark Fashehccd979b2005-12-15 14:31:24 -0800755
756 return err;
757}
758
Mark Fasheh379dfe92006-09-08 14:21:03 -0700759/*
760 * Takes and drops an exclusive lock on the given dentry. This will
761 * force other nodes to drop it.
762 */
763static int ocfs2_remote_dentry_delete(struct dentry *dentry)
764{
765 int ret;
766
767 ret = ocfs2_dentry_lock(dentry, 1);
768 if (ret)
769 mlog_errno(ret);
770 else
771 ocfs2_dentry_unlock(dentry, 1);
772
773 return ret;
774}
775
Mark Fasheh17ff7852006-09-30 23:29:05 -0700776static inline int inode_is_unlinkable(struct inode *inode)
777{
778 if (S_ISDIR(inode->i_mode)) {
779 if (inode->i_nlink == 2)
780 return 1;
781 return 0;
782 }
783
784 if (inode->i_nlink == 1)
785 return 1;
786 return 0;
787}
788
Mark Fashehccd979b2005-12-15 14:31:24 -0800789static int ocfs2_unlink(struct inode *dir,
790 struct dentry *dentry)
791{
792 int status;
Mark Fasheh30a4f5e2006-10-06 11:49:45 -0700793 int child_locked = 0;
Mark Fashehccd979b2005-12-15 14:31:24 -0800794 struct inode *inode = dentry->d_inode;
Mark Fasheh5098c272006-10-05 18:12:57 -0700795 struct inode *orphan_dir = NULL;
Mark Fashehccd979b2005-12-15 14:31:24 -0800796 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
797 u64 blkno;
798 struct ocfs2_dinode *fe = NULL;
799 struct buffer_head *fe_bh = NULL;
800 struct buffer_head *parent_node_bh = NULL;
Mark Fasheh1fabe142006-10-09 18:11:45 -0700801 handle_t *handle = NULL;
Mark Fashehccd979b2005-12-15 14:31:24 -0800802 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
Mark Fasheh4a12ca32008-11-12 15:43:34 -0800803 struct ocfs2_dir_lookup_result lookup = { NULL, };
804 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
Mark Fashehccd979b2005-12-15 14:31:24 -0800805
Tao Ma8990e442011-02-23 22:45:26 +0800806 trace_ocfs2_unlink(dir, dentry, dentry->d_name.len,
807 dentry->d_name.name,
808 (unsigned long long)OCFS2_I(dir)->ip_blkno,
809 (unsigned long long)OCFS2_I(inode)->ip_blkno);
Mark Fashehccd979b2005-12-15 14:31:24 -0800810
Christoph Hellwig871a2932010-03-03 09:05:07 -0500811 dquot_initialize(dir);
Christoph Hellwig907f4552010-03-03 09:05:06 -0500812
Mark Fashehccd979b2005-12-15 14:31:24 -0800813 BUG_ON(dentry->d_parent->d_inode != dir);
814
Tao Ma8990e442011-02-23 22:45:26 +0800815 if (inode == osb->root_inode)
Mark Fasheh30a4f5e2006-10-06 11:49:45 -0700816 return -EPERM;
Mark Fashehccd979b2005-12-15 14:31:24 -0800817
Jan Karacb257972009-06-04 15:26:50 +0200818 status = ocfs2_inode_lock_nested(dir, &parent_node_bh, 1,
819 OI_LS_PARENT);
Mark Fashehccd979b2005-12-15 14:31:24 -0800820 if (status < 0) {
821 if (status != -ENOENT)
822 mlog_errno(status);
Mark Fasheh30a4f5e2006-10-06 11:49:45 -0700823 return status;
Mark Fashehccd979b2005-12-15 14:31:24 -0800824 }
825
826 status = ocfs2_find_files_on_disk(dentry->d_name.name,
Mark Fasheh4a12ca32008-11-12 15:43:34 -0800827 dentry->d_name.len, &blkno, dir,
828 &lookup);
Mark Fashehccd979b2005-12-15 14:31:24 -0800829 if (status < 0) {
830 if (status != -ENOENT)
831 mlog_errno(status);
832 goto leave;
833 }
834
835 if (OCFS2_I(inode)->ip_blkno != blkno) {
836 status = -ENOENT;
837
Tao Ma8990e442011-02-23 22:45:26 +0800838 trace_ocfs2_unlink_noent(
839 (unsigned long long)OCFS2_I(inode)->ip_blkno,
840 (unsigned long long)blkno,
841 OCFS2_I(inode)->ip_flags);
Mark Fashehccd979b2005-12-15 14:31:24 -0800842 goto leave;
843 }
844
Mark Fashehe63aecb62007-10-18 15:30:42 -0700845 status = ocfs2_inode_lock(inode, &fe_bh, 1);
Mark Fashehccd979b2005-12-15 14:31:24 -0800846 if (status < 0) {
847 if (status != -ENOENT)
848 mlog_errno(status);
849 goto leave;
850 }
Mark Fasheh30a4f5e2006-10-06 11:49:45 -0700851 child_locked = 1;
Mark Fashehccd979b2005-12-15 14:31:24 -0800852
853 if (S_ISDIR(inode->i_mode)) {
Mark Fashehb80b5492009-02-18 11:41:38 -0800854 if (inode->i_nlink != 2 || !ocfs2_empty_dir(inode)) {
Mark Fashehccd979b2005-12-15 14:31:24 -0800855 status = -ENOTEMPTY;
856 goto leave;
857 }
858 }
859
Mark Fasheh379dfe92006-09-08 14:21:03 -0700860 status = ocfs2_remote_dentry_delete(dentry);
Mark Fashehccd979b2005-12-15 14:31:24 -0800861 if (status < 0) {
Mark Fasheh34d024f2007-09-24 15:56:19 -0700862 /* This remote delete should succeed under all normal
Mark Fashehccd979b2005-12-15 14:31:24 -0800863 * circumstances. */
864 mlog_errno(status);
865 goto leave;
866 }
867
Mark Fasheh17ff7852006-09-30 23:29:05 -0700868 if (inode_is_unlinkable(inode)) {
Tao Ma19bd3412009-08-18 11:44:10 +0800869 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
870 OCFS2_I(inode)->ip_blkno,
Mark Fasheh4a12ca32008-11-12 15:43:34 -0800871 orphan_name, &orphan_insert);
Mark Fashehccd979b2005-12-15 14:31:24 -0800872 if (status < 0) {
873 mlog_errno(status);
874 goto leave;
875 }
876 }
877
Jan Karaa90714c2008-10-09 19:38:40 +0200878 handle = ocfs2_start_trans(osb, ocfs2_unlink_credits(osb->sb));
Mark Fashehccd979b2005-12-15 14:31:24 -0800879 if (IS_ERR(handle)) {
880 status = PTR_ERR(handle);
881 handle = NULL;
882 mlog_errno(status);
883 goto leave;
884 }
885
Joel Becker0cf2f762009-02-12 16:41:25 -0800886 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode), fe_bh,
Joel Becker13723d02008-10-17 19:25:01 -0700887 OCFS2_JOURNAL_ACCESS_WRITE);
Mark Fashehccd979b2005-12-15 14:31:24 -0800888 if (status < 0) {
889 mlog_errno(status);
890 goto leave;
891 }
892
893 fe = (struct ocfs2_dinode *) fe_bh->b_data;
894
Mark Fasheh17ff7852006-09-30 23:29:05 -0700895 if (inode_is_unlinkable(inode)) {
Tristan Ye3939fda2010-03-19 09:21:09 +0800896 status = ocfs2_orphan_add(osb, handle, inode, fe_bh, orphan_name,
Mark Fasheh4a12ca32008-11-12 15:43:34 -0800897 &orphan_insert, orphan_dir);
Mark Fashehccd979b2005-12-15 14:31:24 -0800898 if (status < 0) {
899 mlog_errno(status);
900 goto leave;
901 }
902 }
903
904 /* delete the name from the parent dir */
Mark Fasheh4a12ca32008-11-12 15:43:34 -0800905 status = ocfs2_delete_entry(handle, dir, &lookup);
Mark Fashehccd979b2005-12-15 14:31:24 -0800906 if (status < 0) {
907 mlog_errno(status);
908 goto leave;
909 }
910
Mark Fasheh17ff7852006-09-30 23:29:05 -0700911 if (S_ISDIR(inode->i_mode))
912 drop_nlink(inode);
913 drop_nlink(inode);
Mark Fasheh198a1ca2008-11-20 17:54:57 -0800914 ocfs2_set_links_count(fe, inode->i_nlink);
Joel Beckerec20cec2010-03-19 14:13:52 -0700915 ocfs2_journal_dirty(handle, fe_bh);
Mark Fashehccd979b2005-12-15 14:31:24 -0800916
Mark Fasheh592282c2007-01-02 17:59:40 -0800917 dir->i_ctime = dir->i_mtime = CURRENT_TIME;
918 if (S_ISDIR(inode->i_mode))
Mark Fasheh17ff7852006-09-30 23:29:05 -0700919 drop_nlink(dir);
Mark Fasheh592282c2007-01-02 17:59:40 -0800920
921 status = ocfs2_mark_inode_dirty(handle, dir, parent_node_bh);
922 if (status < 0) {
923 mlog_errno(status);
924 if (S_ISDIR(inode->i_mode))
Dave Hansend8c76e62006-09-30 23:29:04 -0700925 inc_nlink(dir);
Mark Fashehccd979b2005-12-15 14:31:24 -0800926 }
927
928leave:
Mark Fashehccd979b2005-12-15 14:31:24 -0800929 if (handle)
Mark Fasheh02dc1af2006-10-09 16:48:10 -0700930 ocfs2_commit_trans(osb, handle);
Mark Fashehccd979b2005-12-15 14:31:24 -0800931
Mark Fasheh30a4f5e2006-10-06 11:49:45 -0700932 if (child_locked)
Mark Fashehe63aecb62007-10-18 15:30:42 -0700933 ocfs2_inode_unlock(inode, 1);
Mark Fasheh30a4f5e2006-10-06 11:49:45 -0700934
Mark Fashehe63aecb62007-10-18 15:30:42 -0700935 ocfs2_inode_unlock(dir, 1);
Mark Fasheh30a4f5e2006-10-06 11:49:45 -0700936
Mark Fasheh5098c272006-10-05 18:12:57 -0700937 if (orphan_dir) {
938 /* This was locked for us in ocfs2_prepare_orphan_dir() */
Mark Fashehe63aecb62007-10-18 15:30:42 -0700939 ocfs2_inode_unlock(orphan_dir, 1);
Mark Fasheh5098c272006-10-05 18:12:57 -0700940 mutex_unlock(&orphan_dir->i_mutex);
941 iput(orphan_dir);
942 }
943
Mark Fasheha81cb882008-10-07 14:25:16 -0700944 brelse(fe_bh);
Mark Fasheha81cb882008-10-07 14:25:16 -0700945 brelse(parent_node_bh);
Mark Fasheh4a12ca32008-11-12 15:43:34 -0800946
947 ocfs2_free_dir_lookup_result(&orphan_insert);
948 ocfs2_free_dir_lookup_result(&lookup);
Mark Fashehccd979b2005-12-15 14:31:24 -0800949
Tao Mac1e8d352011-03-07 16:43:21 +0800950 if (status)
951 mlog_errno(status);
Mark Fashehccd979b2005-12-15 14:31:24 -0800952
953 return status;
954}
955
956/*
957 * The only place this should be used is rename!
958 * if they have the same id, then the 1st one is the only one locked.
959 */
960static int ocfs2_double_lock(struct ocfs2_super *osb,
Mark Fashehccd979b2005-12-15 14:31:24 -0800961 struct buffer_head **bh1,
962 struct inode *inode1,
963 struct buffer_head **bh2,
964 struct inode *inode2)
965{
966 int status;
967 struct ocfs2_inode_info *oi1 = OCFS2_I(inode1);
968 struct ocfs2_inode_info *oi2 = OCFS2_I(inode2);
969 struct buffer_head **tmpbh;
970 struct inode *tmpinode;
971
Tao Ma8990e442011-02-23 22:45:26 +0800972 trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno,
973 (unsigned long long)oi2->ip_blkno);
Mark Fashehccd979b2005-12-15 14:31:24 -0800974
Mark Fashehccd979b2005-12-15 14:31:24 -0800975 if (*bh1)
976 *bh1 = NULL;
977 if (*bh2)
978 *bh2 = NULL;
979
980 /* we always want to lock the one with the lower lockid first. */
981 if (oi1->ip_blkno != oi2->ip_blkno) {
982 if (oi1->ip_blkno < oi2->ip_blkno) {
983 /* switch id1 and id2 around */
Mark Fashehccd979b2005-12-15 14:31:24 -0800984 tmpbh = bh2;
985 bh2 = bh1;
986 bh1 = tmpbh;
987
988 tmpinode = inode2;
989 inode2 = inode1;
990 inode1 = tmpinode;
991 }
992 /* lock id2 */
Jan Karacb257972009-06-04 15:26:50 +0200993 status = ocfs2_inode_lock_nested(inode2, bh2, 1,
994 OI_LS_RENAME1);
Mark Fashehccd979b2005-12-15 14:31:24 -0800995 if (status < 0) {
996 if (status != -ENOENT)
997 mlog_errno(status);
998 goto bail;
999 }
1000 }
Mark Fasheh8d5596c2006-10-06 15:04:51 -07001001
Mark Fashehccd979b2005-12-15 14:31:24 -08001002 /* lock id1 */
Jan Karacb257972009-06-04 15:26:50 +02001003 status = ocfs2_inode_lock_nested(inode1, bh1, 1, OI_LS_RENAME2);
Mark Fashehccd979b2005-12-15 14:31:24 -08001004 if (status < 0) {
Mark Fasheh8d5596c2006-10-06 15:04:51 -07001005 /*
1006 * An error return must mean that no cluster locks
1007 * were held on function exit.
1008 */
Tao Ma1e6d9152010-12-20 16:21:11 +08001009 if (oi1->ip_blkno != oi2->ip_blkno) {
Mark Fashehe63aecb62007-10-18 15:30:42 -07001010 ocfs2_inode_unlock(inode2, 1);
Tao Ma1e6d9152010-12-20 16:21:11 +08001011 brelse(*bh2);
1012 *bh2 = NULL;
1013 }
Mark Fasheh8d5596c2006-10-06 15:04:51 -07001014
Mark Fashehccd979b2005-12-15 14:31:24 -08001015 if (status != -ENOENT)
1016 mlog_errno(status);
Mark Fashehccd979b2005-12-15 14:31:24 -08001017 }
Mark Fasheh8d5596c2006-10-06 15:04:51 -07001018
Tao Ma8990e442011-02-23 22:45:26 +08001019 trace_ocfs2_double_lock_end(
1020 (unsigned long long)OCFS2_I(inode1)->ip_blkno,
1021 (unsigned long long)OCFS2_I(inode2)->ip_blkno);
1022
Mark Fashehccd979b2005-12-15 14:31:24 -08001023bail:
Tao Mac1e8d352011-03-07 16:43:21 +08001024 if (status)
1025 mlog_errno(status);
Mark Fashehccd979b2005-12-15 14:31:24 -08001026 return status;
1027}
1028
Mark Fasheh8d5596c2006-10-06 15:04:51 -07001029static void ocfs2_double_unlock(struct inode *inode1, struct inode *inode2)
1030{
Mark Fashehe63aecb62007-10-18 15:30:42 -07001031 ocfs2_inode_unlock(inode1, 1);
Mark Fasheh8d5596c2006-10-06 15:04:51 -07001032
1033 if (inode1 != inode2)
Mark Fashehe63aecb62007-10-18 15:30:42 -07001034 ocfs2_inode_unlock(inode2, 1);
Mark Fasheh8d5596c2006-10-06 15:04:51 -07001035}
1036
Mark Fashehccd979b2005-12-15 14:31:24 -08001037static int ocfs2_rename(struct inode *old_dir,
1038 struct dentry *old_dentry,
1039 struct inode *new_dir,
1040 struct dentry *new_dentry)
1041{
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001042 int status = 0, rename_lock = 0, parents_locked = 0, target_exists = 0;
1043 int old_child_locked = 0, new_child_locked = 0, update_dot_dot = 0;
Mark Fashehccd979b2005-12-15 14:31:24 -08001044 struct inode *old_inode = old_dentry->d_inode;
1045 struct inode *new_inode = new_dentry->d_inode;
Mark Fasheh5098c272006-10-05 18:12:57 -07001046 struct inode *orphan_dir = NULL;
Mark Fashehccd979b2005-12-15 14:31:24 -08001047 struct ocfs2_dinode *newfe = NULL;
1048 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
Mark Fashehccd979b2005-12-15 14:31:24 -08001049 struct buffer_head *newfe_bh = NULL;
Mark Fasheh592282c2007-01-02 17:59:40 -08001050 struct buffer_head *old_inode_bh = NULL;
Mark Fashehccd979b2005-12-15 14:31:24 -08001051 struct ocfs2_super *osb = NULL;
Mark Fasheh5b6a3a22007-09-13 16:33:54 -07001052 u64 newfe_blkno, old_de_ino;
Mark Fasheh1fabe142006-10-09 18:11:45 -07001053 handle_t *handle = NULL;
Mark Fashehccd979b2005-12-15 14:31:24 -08001054 struct buffer_head *old_dir_bh = NULL;
1055 struct buffer_head *new_dir_bh = NULL;
Mark Fasheh592282c2007-01-02 17:59:40 -08001056 nlink_t old_dir_nlink = old_dir->i_nlink;
Sunil Mushran480214d2007-08-06 15:11:56 -07001057 struct ocfs2_dinode *old_di;
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001058 struct ocfs2_dir_lookup_result old_inode_dot_dot_res = { NULL, };
1059 struct ocfs2_dir_lookup_result target_lookup_res = { NULL, };
1060 struct ocfs2_dir_lookup_result old_entry_lookup = { NULL, };
1061 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
1062 struct ocfs2_dir_lookup_result target_insert = { NULL, };
Mark Fashehccd979b2005-12-15 14:31:24 -08001063
1064 /* At some point it might be nice to break this function up a
1065 * bit. */
1066
Tao Ma8990e442011-02-23 22:45:26 +08001067 trace_ocfs2_rename(old_dir, old_dentry, new_dir, new_dentry,
1068 old_dentry->d_name.len, old_dentry->d_name.name,
1069 new_dentry->d_name.len, new_dentry->d_name.name);
Mark Fashehccd979b2005-12-15 14:31:24 -08001070
Christoph Hellwig871a2932010-03-03 09:05:07 -05001071 dquot_initialize(old_dir);
1072 dquot_initialize(new_dir);
Christoph Hellwig907f4552010-03-03 09:05:06 -05001073
Mark Fashehccd979b2005-12-15 14:31:24 -08001074 osb = OCFS2_SB(old_dir->i_sb);
1075
1076 if (new_inode) {
1077 if (!igrab(new_inode))
1078 BUG();
1079 }
1080
Uwe Kleine-König1b3c3712007-02-17 19:23:03 +01001081 /* Assume a directory hierarchy thusly:
Mark Fashehccd979b2005-12-15 14:31:24 -08001082 * a/b/c
1083 * a/d
1084 * a,b,c, and d are all directories.
1085 *
1086 * from cwd of 'a' on both nodes:
1087 * node1: mv b/c d
1088 * node2: mv d b/c
1089 *
1090 * And that's why, just like the VFS, we need a file system
1091 * rename lock. */
Jan Kara5dabd692008-02-21 18:00:00 +01001092 if (old_dir != new_dir && S_ISDIR(old_inode->i_mode)) {
Mark Fashehccd979b2005-12-15 14:31:24 -08001093 status = ocfs2_rename_lock(osb);
1094 if (status < 0) {
1095 mlog_errno(status);
1096 goto bail;
1097 }
1098 rename_lock = 1;
1099 }
1100
Mark Fashehccd979b2005-12-15 14:31:24 -08001101 /* if old and new are the same, this'll just do one lock. */
Mark Fasheh8d5596c2006-10-06 15:04:51 -07001102 status = ocfs2_double_lock(osb, &old_dir_bh, old_dir,
1103 &new_dir_bh, new_dir);
Mark Fashehccd979b2005-12-15 14:31:24 -08001104 if (status < 0) {
1105 mlog_errno(status);
1106 goto bail;
1107 }
Mark Fasheh8d5596c2006-10-06 15:04:51 -07001108 parents_locked = 1;
Mark Fashehccd979b2005-12-15 14:31:24 -08001109
1110 /* make sure both dirs have bhs
1111 * get an extra ref on old_dir_bh if old==new */
1112 if (!new_dir_bh) {
1113 if (old_dir_bh) {
1114 new_dir_bh = old_dir_bh;
1115 get_bh(new_dir_bh);
1116 } else {
1117 mlog(ML_ERROR, "no old_dir_bh!\n");
1118 status = -EIO;
1119 goto bail;
1120 }
1121 }
1122
Mark Fasheh379dfe92006-09-08 14:21:03 -07001123 /*
Mark Fasheh592282c2007-01-02 17:59:40 -08001124 * Aside from allowing a meta data update, the locking here
Mark Fasheh34d024f2007-09-24 15:56:19 -07001125 * also ensures that the downconvert thread on other nodes
1126 * won't have to concurrently downconvert the inode and the
1127 * dentry locks.
Mark Fasheh379dfe92006-09-08 14:21:03 -07001128 */
Jan Karacb257972009-06-04 15:26:50 +02001129 status = ocfs2_inode_lock_nested(old_inode, &old_inode_bh, 1,
1130 OI_LS_PARENT);
Mark Fasheh379dfe92006-09-08 14:21:03 -07001131 if (status < 0) {
1132 if (status != -ENOENT)
Mark Fashehccd979b2005-12-15 14:31:24 -08001133 mlog_errno(status);
Mark Fasheh379dfe92006-09-08 14:21:03 -07001134 goto bail;
1135 }
Mark Fasheh8d5596c2006-10-06 15:04:51 -07001136 old_child_locked = 1;
Mark Fashehccd979b2005-12-15 14:31:24 -08001137
Mark Fasheh379dfe92006-09-08 14:21:03 -07001138 status = ocfs2_remote_dentry_delete(old_dentry);
1139 if (status < 0) {
1140 mlog_errno(status);
1141 goto bail;
1142 }
1143
1144 if (S_ISDIR(old_inode->i_mode)) {
Mark Fasheh38760e22007-09-11 17:21:56 -07001145 u64 old_inode_parent;
Mark Fashehccd979b2005-12-15 14:31:24 -08001146
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001147 update_dot_dot = 1;
Mark Fasheh38760e22007-09-11 17:21:56 -07001148 status = ocfs2_find_files_on_disk("..", 2, &old_inode_parent,
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001149 old_inode,
1150 &old_inode_dot_dot_res);
Mark Fasheh38760e22007-09-11 17:21:56 -07001151 if (status) {
1152 status = -EIO;
Mark Fashehccd979b2005-12-15 14:31:24 -08001153 goto bail;
Mark Fasheh38760e22007-09-11 17:21:56 -07001154 }
1155
1156 if (old_inode_parent != OCFS2_I(old_dir)->ip_blkno) {
1157 status = -EIO;
Mark Fashehccd979b2005-12-15 14:31:24 -08001158 goto bail;
Mark Fasheh38760e22007-09-11 17:21:56 -07001159 }
1160
1161 if (!new_inode && new_dir != old_dir &&
Mark Fasheh198a1ca2008-11-20 17:54:57 -08001162 new_dir->i_nlink >= ocfs2_link_max(osb)) {
Mark Fasheh38760e22007-09-11 17:21:56 -07001163 status = -EMLINK;
1164 goto bail;
1165 }
Mark Fashehccd979b2005-12-15 14:31:24 -08001166 }
1167
Mark Fasheh5b6a3a22007-09-13 16:33:54 -07001168 status = ocfs2_lookup_ino_from_name(old_dir, old_dentry->d_name.name,
1169 old_dentry->d_name.len,
1170 &old_de_ino);
1171 if (status) {
1172 status = -ENOENT;
Mark Fashehccd979b2005-12-15 14:31:24 -08001173 goto bail;
Mark Fasheh5b6a3a22007-09-13 16:33:54 -07001174 }
Mark Fashehccd979b2005-12-15 14:31:24 -08001175
1176 /*
1177 * Check for inode number is _not_ due to possible IO errors.
1178 * We might rmdir the source, keep it as pwd of some process
1179 * and merrily kill the link to whatever was created under the
1180 * same name. Goodbye sticky bit ;-<
1181 */
Mark Fasheh5b6a3a22007-09-13 16:33:54 -07001182 if (old_de_ino != OCFS2_I(old_inode)->ip_blkno) {
1183 status = -ENOENT;
Mark Fashehccd979b2005-12-15 14:31:24 -08001184 goto bail;
Mark Fasheh5b6a3a22007-09-13 16:33:54 -07001185 }
Mark Fashehccd979b2005-12-15 14:31:24 -08001186
1187 /* check if the target already exists (in which case we need
1188 * to delete it */
1189 status = ocfs2_find_files_on_disk(new_dentry->d_name.name,
1190 new_dentry->d_name.len,
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001191 &newfe_blkno, new_dir,
1192 &target_lookup_res);
Mark Fashehccd979b2005-12-15 14:31:24 -08001193 /* The only error we allow here is -ENOENT because the new
1194 * file not existing is perfectly valid. */
1195 if ((status < 0) && (status != -ENOENT)) {
1196 /* If we cannot find the file specified we should just */
1197 /* return the error... */
1198 mlog_errno(status);
1199 goto bail;
1200 }
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001201 if (status == 0)
1202 target_exists = 1;
Mark Fashehccd979b2005-12-15 14:31:24 -08001203
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001204 if (!target_exists && new_inode) {
Srinivas Eedae325a882007-10-31 16:49:43 -07001205 /*
1206 * Target was unlinked by another node while we were
1207 * waiting to get to ocfs2_rename(). There isn't
1208 * anything we can do here to help the situation, so
1209 * bubble up the appropriate error.
1210 */
1211 status = -ENOENT;
1212 goto bail;
1213 }
Mark Fashehccd979b2005-12-15 14:31:24 -08001214
1215 /* In case we need to overwrite an existing file, we blow it
1216 * away first */
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001217 if (target_exists) {
Mark Fashehccd979b2005-12-15 14:31:24 -08001218 /* VFS didn't think there existed an inode here, but
1219 * someone else in the cluster must have raced our
1220 * rename to create one. Today we error cleanly, in
1221 * the future we should consider calling iget to build
1222 * a new struct inode for this entry. */
1223 if (!new_inode) {
1224 status = -EACCES;
1225
Tao Ma8990e442011-02-23 22:45:26 +08001226 trace_ocfs2_rename_target_exists(new_dentry->d_name.len,
1227 new_dentry->d_name.name);
Mark Fashehccd979b2005-12-15 14:31:24 -08001228 goto bail;
1229 }
1230
1231 if (OCFS2_I(new_inode)->ip_blkno != newfe_blkno) {
1232 status = -EACCES;
1233
Tao Ma8990e442011-02-23 22:45:26 +08001234 trace_ocfs2_rename_disagree(
Mark Fashehb06970532006-03-03 10:24:33 -08001235 (unsigned long long)OCFS2_I(new_inode)->ip_blkno,
1236 (unsigned long long)newfe_blkno,
Mark Fashehccd979b2005-12-15 14:31:24 -08001237 OCFS2_I(new_inode)->ip_flags);
1238 goto bail;
1239 }
1240
Mark Fashehe63aecb62007-10-18 15:30:42 -07001241 status = ocfs2_inode_lock(new_inode, &newfe_bh, 1);
Mark Fashehccd979b2005-12-15 14:31:24 -08001242 if (status < 0) {
1243 if (status != -ENOENT)
1244 mlog_errno(status);
1245 goto bail;
1246 }
Mark Fasheh8d5596c2006-10-06 15:04:51 -07001247 new_child_locked = 1;
Mark Fashehccd979b2005-12-15 14:31:24 -08001248
Mark Fasheh379dfe92006-09-08 14:21:03 -07001249 status = ocfs2_remote_dentry_delete(new_dentry);
Mark Fashehccd979b2005-12-15 14:31:24 -08001250 if (status < 0) {
1251 mlog_errno(status);
1252 goto bail;
1253 }
1254
1255 newfe = (struct ocfs2_dinode *) newfe_bh->b_data;
1256
Tao Ma8990e442011-02-23 22:45:26 +08001257 trace_ocfs2_rename_over_existing(
Mark Fashehb06970532006-03-03 10:24:33 -08001258 (unsigned long long)newfe_blkno, newfe_bh, newfe_bh ?
Mark Fashehccd979b2005-12-15 14:31:24 -08001259 (unsigned long long)newfe_bh->b_blocknr : 0ULL);
1260
1261 if (S_ISDIR(new_inode->i_mode) || (new_inode->i_nlink == 1)) {
Mark Fasheh5098c272006-10-05 18:12:57 -07001262 status = ocfs2_prepare_orphan_dir(osb, &orphan_dir,
Tao Ma19bd3412009-08-18 11:44:10 +08001263 OCFS2_I(new_inode)->ip_blkno,
1264 orphan_name, &orphan_insert);
Mark Fashehccd979b2005-12-15 14:31:24 -08001265 if (status < 0) {
1266 mlog_errno(status);
1267 goto bail;
1268 }
1269 }
1270 } else {
1271 BUG_ON(new_dentry->d_parent->d_inode != new_dir);
1272
1273 status = ocfs2_check_dir_for_entry(new_dir,
1274 new_dentry->d_name.name,
1275 new_dentry->d_name.len);
1276 if (status)
1277 goto bail;
1278
1279 status = ocfs2_prepare_dir_for_insert(osb, new_dir, new_dir_bh,
1280 new_dentry->d_name.name,
1281 new_dentry->d_name.len,
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001282 &target_insert);
Mark Fashehccd979b2005-12-15 14:31:24 -08001283 if (status < 0) {
1284 mlog_errno(status);
1285 goto bail;
1286 }
1287 }
1288
Jan Karaa90714c2008-10-09 19:38:40 +02001289 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
Mark Fashehccd979b2005-12-15 14:31:24 -08001290 if (IS_ERR(handle)) {
1291 status = PTR_ERR(handle);
1292 handle = NULL;
1293 mlog_errno(status);
1294 goto bail;
1295 }
1296
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001297 if (target_exists) {
Mark Fashehccd979b2005-12-15 14:31:24 -08001298 if (S_ISDIR(new_inode->i_mode)) {
Mark Fashehb80b5492009-02-18 11:41:38 -08001299 if (new_inode->i_nlink != 2 ||
1300 !ocfs2_empty_dir(new_inode)) {
Mark Fashehccd979b2005-12-15 14:31:24 -08001301 status = -ENOTEMPTY;
1302 goto bail;
1303 }
1304 }
Joel Becker0cf2f762009-02-12 16:41:25 -08001305 status = ocfs2_journal_access_di(handle, INODE_CACHE(new_inode),
1306 newfe_bh,
Joel Becker13723d02008-10-17 19:25:01 -07001307 OCFS2_JOURNAL_ACCESS_WRITE);
Mark Fashehccd979b2005-12-15 14:31:24 -08001308 if (status < 0) {
1309 mlog_errno(status);
1310 goto bail;
1311 }
1312
1313 if (S_ISDIR(new_inode->i_mode) ||
Mark Fasheh198a1ca2008-11-20 17:54:57 -08001314 (ocfs2_read_links_count(newfe) == 1)) {
Mark Fashehccd979b2005-12-15 14:31:24 -08001315 status = ocfs2_orphan_add(osb, handle, new_inode,
Tristan Ye3939fda2010-03-19 09:21:09 +08001316 newfe_bh, orphan_name,
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001317 &orphan_insert, orphan_dir);
Mark Fashehccd979b2005-12-15 14:31:24 -08001318 if (status < 0) {
1319 mlog_errno(status);
1320 goto bail;
1321 }
1322 }
1323
1324 /* change the dirent to point to the correct inode */
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001325 status = ocfs2_update_entry(new_dir, handle, &target_lookup_res,
1326 old_inode);
Mark Fashehccd979b2005-12-15 14:31:24 -08001327 if (status < 0) {
1328 mlog_errno(status);
1329 goto bail;
1330 }
Mark Fashehccd979b2005-12-15 14:31:24 -08001331 new_dir->i_version++;
Mark Fashehccd979b2005-12-15 14:31:24 -08001332
1333 if (S_ISDIR(new_inode->i_mode))
Mark Fasheh198a1ca2008-11-20 17:54:57 -08001334 ocfs2_set_links_count(newfe, 0);
Mark Fashehccd979b2005-12-15 14:31:24 -08001335 else
Mark Fasheh198a1ca2008-11-20 17:54:57 -08001336 ocfs2_add_links_count(newfe, -1);
Joel Beckerec20cec2010-03-19 14:13:52 -07001337 ocfs2_journal_dirty(handle, newfe_bh);
Mark Fashehccd979b2005-12-15 14:31:24 -08001338 } else {
1339 /* if the name was not found in new_dir, add it now */
1340 status = ocfs2_add_entry(handle, new_dentry, old_inode,
1341 OCFS2_I(old_inode)->ip_blkno,
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001342 new_dir_bh, &target_insert);
Mark Fashehccd979b2005-12-15 14:31:24 -08001343 }
1344
1345 old_inode->i_ctime = CURRENT_TIME;
1346 mark_inode_dirty(old_inode);
Sunil Mushran480214d2007-08-06 15:11:56 -07001347
Joel Becker0cf2f762009-02-12 16:41:25 -08001348 status = ocfs2_journal_access_di(handle, INODE_CACHE(old_inode),
1349 old_inode_bh,
Joel Becker13723d02008-10-17 19:25:01 -07001350 OCFS2_JOURNAL_ACCESS_WRITE);
Sunil Mushran480214d2007-08-06 15:11:56 -07001351 if (status >= 0) {
1352 old_di = (struct ocfs2_dinode *) old_inode_bh->b_data;
1353
1354 old_di->i_ctime = cpu_to_le64(old_inode->i_ctime.tv_sec);
1355 old_di->i_ctime_nsec = cpu_to_le32(old_inode->i_ctime.tv_nsec);
Joel Beckerec20cec2010-03-19 14:13:52 -07001356 ocfs2_journal_dirty(handle, old_inode_bh);
Sunil Mushran480214d2007-08-06 15:11:56 -07001357 } else
1358 mlog_errno(status);
Mark Fashehccd979b2005-12-15 14:31:24 -08001359
Mark Fasheh5b6a3a22007-09-13 16:33:54 -07001360 /*
1361 * Now that the name has been added to new_dir, remove the old name.
1362 *
1363 * We don't keep any directory entry context around until now
1364 * because the insert might have changed the type of directory
1365 * we're dealing with.
1366 */
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001367 status = ocfs2_find_entry(old_dentry->d_name.name,
1368 old_dentry->d_name.len, old_dir,
1369 &old_entry_lookup);
1370 if (status)
Mark Fasheh5b6a3a22007-09-13 16:33:54 -07001371 goto bail;
Mark Fasheh5b6a3a22007-09-13 16:33:54 -07001372
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001373 status = ocfs2_delete_entry(handle, old_dir, &old_entry_lookup);
Mark Fashehccd979b2005-12-15 14:31:24 -08001374 if (status < 0) {
1375 mlog_errno(status);
1376 goto bail;
1377 }
1378
1379 if (new_inode) {
Miklos Szeredi6d6b77f2011-10-28 14:13:28 +02001380 drop_nlink(new_inode);
Mark Fashehccd979b2005-12-15 14:31:24 -08001381 new_inode->i_ctime = CURRENT_TIME;
1382 }
1383 old_dir->i_ctime = old_dir->i_mtime = CURRENT_TIME;
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001384
1385 if (update_dot_dot) {
1386 status = ocfs2_update_entry(old_inode, handle,
1387 &old_inode_dot_dot_res, new_dir);
Miklos Szeredi6d6b77f2011-10-28 14:13:28 +02001388 drop_nlink(old_dir);
Mark Fashehccd979b2005-12-15 14:31:24 -08001389 if (new_inode) {
Miklos Szeredi6d6b77f2011-10-28 14:13:28 +02001390 drop_nlink(new_inode);
Mark Fashehccd979b2005-12-15 14:31:24 -08001391 } else {
Dave Hansend8c76e62006-09-30 23:29:04 -07001392 inc_nlink(new_dir);
Mark Fashehccd979b2005-12-15 14:31:24 -08001393 mark_inode_dirty(new_dir);
1394 }
1395 }
1396 mark_inode_dirty(old_dir);
Mark Fasheh592282c2007-01-02 17:59:40 -08001397 ocfs2_mark_inode_dirty(handle, old_dir, old_dir_bh);
1398 if (new_inode) {
Mark Fashehccd979b2005-12-15 14:31:24 -08001399 mark_inode_dirty(new_inode);
Mark Fasheh592282c2007-01-02 17:59:40 -08001400 ocfs2_mark_inode_dirty(handle, new_inode, newfe_bh);
1401 }
Mark Fashehccd979b2005-12-15 14:31:24 -08001402
Mark Fasheh592282c2007-01-02 17:59:40 -08001403 if (old_dir != new_dir) {
1404 /* Keep the same times on both directories.*/
1405 new_dir->i_ctime = new_dir->i_mtime = old_dir->i_ctime;
1406
1407 /*
1408 * This will also pick up the i_nlink change from the
1409 * block above.
1410 */
1411 ocfs2_mark_inode_dirty(handle, new_dir, new_dir_bh);
1412 }
Mark Fashehccd979b2005-12-15 14:31:24 -08001413
1414 if (old_dir_nlink != old_dir->i_nlink) {
1415 if (!old_dir_bh) {
1416 mlog(ML_ERROR, "need to change nlink for old dir "
Mark Fashehb06970532006-03-03 10:24:33 -08001417 "%llu from %d to %d but bh is NULL!\n",
1418 (unsigned long long)OCFS2_I(old_dir)->ip_blkno,
1419 (int)old_dir_nlink, old_dir->i_nlink);
Mark Fashehccd979b2005-12-15 14:31:24 -08001420 } else {
1421 struct ocfs2_dinode *fe;
Joel Becker0cf2f762009-02-12 16:41:25 -08001422 status = ocfs2_journal_access_di(handle,
1423 INODE_CACHE(old_dir),
1424 old_dir_bh,
1425 OCFS2_JOURNAL_ACCESS_WRITE);
Mark Fashehccd979b2005-12-15 14:31:24 -08001426 fe = (struct ocfs2_dinode *) old_dir_bh->b_data;
Mark Fasheh198a1ca2008-11-20 17:54:57 -08001427 ocfs2_set_links_count(fe, old_dir->i_nlink);
Joel Beckerec20cec2010-03-19 14:13:52 -07001428 ocfs2_journal_dirty(handle, old_dir_bh);
Mark Fashehccd979b2005-12-15 14:31:24 -08001429 }
1430 }
Mark Fasheh379dfe92006-09-08 14:21:03 -07001431 ocfs2_dentry_move(old_dentry, new_dentry, old_dir, new_dir);
Mark Fashehccd979b2005-12-15 14:31:24 -08001432 status = 0;
1433bail:
1434 if (rename_lock)
1435 ocfs2_rename_unlock(osb);
1436
1437 if (handle)
Mark Fasheh02dc1af2006-10-09 16:48:10 -07001438 ocfs2_commit_trans(osb, handle);
Mark Fashehccd979b2005-12-15 14:31:24 -08001439
Mark Fasheh8d5596c2006-10-06 15:04:51 -07001440 if (parents_locked)
1441 ocfs2_double_unlock(old_dir, new_dir);
1442
1443 if (old_child_locked)
Mark Fashehe63aecb62007-10-18 15:30:42 -07001444 ocfs2_inode_unlock(old_inode, 1);
Mark Fasheh8d5596c2006-10-06 15:04:51 -07001445
1446 if (new_child_locked)
Mark Fashehe63aecb62007-10-18 15:30:42 -07001447 ocfs2_inode_unlock(new_inode, 1);
Mark Fasheh8d5596c2006-10-06 15:04:51 -07001448
Mark Fasheh5098c272006-10-05 18:12:57 -07001449 if (orphan_dir) {
1450 /* This was locked for us in ocfs2_prepare_orphan_dir() */
Mark Fashehe63aecb62007-10-18 15:30:42 -07001451 ocfs2_inode_unlock(orphan_dir, 1);
Mark Fasheh5098c272006-10-05 18:12:57 -07001452 mutex_unlock(&orphan_dir->i_mutex);
1453 iput(orphan_dir);
1454 }
1455
Mark Fashehccd979b2005-12-15 14:31:24 -08001456 if (new_inode)
1457 sync_mapping_buffers(old_inode->i_mapping);
1458
1459 if (new_inode)
1460 iput(new_inode);
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001461
1462 ocfs2_free_dir_lookup_result(&target_lookup_res);
1463 ocfs2_free_dir_lookup_result(&old_entry_lookup);
1464 ocfs2_free_dir_lookup_result(&old_inode_dot_dot_res);
1465 ocfs2_free_dir_lookup_result(&orphan_insert);
1466 ocfs2_free_dir_lookup_result(&target_insert);
1467
Mark Fasheha81cb882008-10-07 14:25:16 -07001468 brelse(newfe_bh);
1469 brelse(old_inode_bh);
1470 brelse(old_dir_bh);
1471 brelse(new_dir_bh);
Mark Fashehccd979b2005-12-15 14:31:24 -08001472
Tao Mac1e8d352011-03-07 16:43:21 +08001473 if (status)
1474 mlog_errno(status);
Mark Fashehccd979b2005-12-15 14:31:24 -08001475
1476 return status;
1477}
1478
1479/*
1480 * we expect i_size = strlen(symname). Copy symname into the file
1481 * data, including the null terminator.
1482 */
1483static int ocfs2_create_symlink_data(struct ocfs2_super *osb,
Mark Fasheh1fabe142006-10-09 18:11:45 -07001484 handle_t *handle,
Mark Fashehccd979b2005-12-15 14:31:24 -08001485 struct inode *inode,
1486 const char *symname)
1487{
1488 struct buffer_head **bhs = NULL;
1489 const char *c;
1490 struct super_block *sb = osb->sb;
Mark Fasheh4f902c32007-03-09 16:26:50 -08001491 u64 p_blkno, p_blocks;
Mark Fashehccd979b2005-12-15 14:31:24 -08001492 int virtual, blocks, status, i, bytes_left;
1493
1494 bytes_left = i_size_read(inode) + 1;
1495 /* we can't trust i_blocks because we're actually going to
1496 * write i_size + 1 bytes. */
1497 blocks = (bytes_left + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
1498
Tao Ma8990e442011-02-23 22:45:26 +08001499 trace_ocfs2_create_symlink_data((unsigned long long)inode->i_blocks,
1500 i_size_read(inode), blocks);
Mark Fashehccd979b2005-12-15 14:31:24 -08001501
1502 /* Sanity check -- make sure we're going to fit. */
1503 if (bytes_left >
1504 ocfs2_clusters_to_bytes(sb, OCFS2_I(inode)->ip_clusters)) {
1505 status = -EIO;
1506 mlog_errno(status);
1507 goto bail;
1508 }
1509
1510 bhs = kcalloc(blocks, sizeof(struct buffer_head *), GFP_KERNEL);
1511 if (!bhs) {
1512 status = -ENOMEM;
1513 mlog_errno(status);
1514 goto bail;
1515 }
1516
Mark Fasheh49cb8d22007-03-09 16:21:46 -08001517 status = ocfs2_extent_map_get_blocks(inode, 0, &p_blkno, &p_blocks,
1518 NULL);
Mark Fashehccd979b2005-12-15 14:31:24 -08001519 if (status < 0) {
1520 mlog_errno(status);
1521 goto bail;
1522 }
1523
1524 /* links can never be larger than one cluster so we know this
1525 * is all going to be contiguous, but do a sanity check
1526 * anyway. */
1527 if ((p_blocks << sb->s_blocksize_bits) < bytes_left) {
1528 status = -EIO;
1529 mlog_errno(status);
1530 goto bail;
1531 }
1532
1533 virtual = 0;
1534 while(bytes_left > 0) {
1535 c = &symname[virtual * sb->s_blocksize];
1536
1537 bhs[virtual] = sb_getblk(sb, p_blkno);
1538 if (!bhs[virtual]) {
1539 status = -ENOMEM;
1540 mlog_errno(status);
1541 goto bail;
1542 }
Joel Becker8cb471e2009-02-10 20:00:41 -08001543 ocfs2_set_new_buffer_uptodate(INODE_CACHE(inode),
1544 bhs[virtual]);
Mark Fashehccd979b2005-12-15 14:31:24 -08001545
Joel Becker0cf2f762009-02-12 16:41:25 -08001546 status = ocfs2_journal_access(handle, INODE_CACHE(inode),
1547 bhs[virtual],
Mark Fashehccd979b2005-12-15 14:31:24 -08001548 OCFS2_JOURNAL_ACCESS_CREATE);
1549 if (status < 0) {
1550 mlog_errno(status);
1551 goto bail;
1552 }
1553
1554 memset(bhs[virtual]->b_data, 0, sb->s_blocksize);
1555
1556 memcpy(bhs[virtual]->b_data, c,
1557 (bytes_left > sb->s_blocksize) ? sb->s_blocksize :
1558 bytes_left);
1559
Joel Beckerec20cec2010-03-19 14:13:52 -07001560 ocfs2_journal_dirty(handle, bhs[virtual]);
Mark Fashehccd979b2005-12-15 14:31:24 -08001561
1562 virtual++;
1563 p_blkno++;
1564 bytes_left -= sb->s_blocksize;
1565 }
1566
1567 status = 0;
1568bail:
1569
1570 if (bhs) {
1571 for(i = 0; i < blocks; i++)
Mark Fasheha81cb882008-10-07 14:25:16 -07001572 brelse(bhs[i]);
Mark Fashehccd979b2005-12-15 14:31:24 -08001573 kfree(bhs);
1574 }
1575
Tao Mac1e8d352011-03-07 16:43:21 +08001576 if (status)
1577 mlog_errno(status);
Mark Fashehccd979b2005-12-15 14:31:24 -08001578 return status;
1579}
1580
1581static int ocfs2_symlink(struct inode *dir,
1582 struct dentry *dentry,
1583 const char *symname)
1584{
1585 int status, l, credits;
1586 u64 newsize;
1587 struct ocfs2_super *osb = NULL;
1588 struct inode *inode = NULL;
1589 struct super_block *sb;
1590 struct buffer_head *new_fe_bh = NULL;
Mark Fashehccd979b2005-12-15 14:31:24 -08001591 struct buffer_head *parent_fe_bh = NULL;
1592 struct ocfs2_dinode *fe = NULL;
1593 struct ocfs2_dinode *dirfe;
Mark Fasheh1fabe142006-10-09 18:11:45 -07001594 handle_t *handle = NULL;
Mark Fashehccd979b2005-12-15 14:31:24 -08001595 struct ocfs2_alloc_context *inode_ac = NULL;
1596 struct ocfs2_alloc_context *data_ac = NULL;
Tiger Yang534eadd2008-11-14 11:16:41 +08001597 struct ocfs2_alloc_context *xattr_ac = NULL;
1598 int want_clusters = 0;
1599 int xattr_credits = 0;
1600 struct ocfs2_security_xattr_info si = {
1601 .enable = 1,
1602 };
Jan Karaa90714c2008-10-09 19:38:40 +02001603 int did_quota = 0, did_quota_inode = 0;
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001604 struct ocfs2_dir_lookup_result lookup = { NULL, };
Joel Becker547ba7c2010-05-10 11:56:52 -07001605 sigset_t oldset;
1606 int did_block_signals = 0;
Mark Fashehccd979b2005-12-15 14:31:24 -08001607
Tao Ma8990e442011-02-23 22:45:26 +08001608 trace_ocfs2_symlink_begin(dir, dentry, symname,
1609 dentry->d_name.len, dentry->d_name.name);
Mark Fashehccd979b2005-12-15 14:31:24 -08001610
Christoph Hellwig871a2932010-03-03 09:05:07 -05001611 dquot_initialize(dir);
Christoph Hellwig907f4552010-03-03 09:05:06 -05001612
Mark Fashehccd979b2005-12-15 14:31:24 -08001613 sb = dir->i_sb;
1614 osb = OCFS2_SB(sb);
1615
1616 l = strlen(symname) + 1;
1617
1618 credits = ocfs2_calc_symlink_credits(sb);
1619
Mark Fashehccd979b2005-12-15 14:31:24 -08001620 /* lock the parent directory */
Mark Fashehe63aecb62007-10-18 15:30:42 -07001621 status = ocfs2_inode_lock(dir, &parent_fe_bh, 1);
Mark Fashehccd979b2005-12-15 14:31:24 -08001622 if (status < 0) {
1623 if (status != -ENOENT)
1624 mlog_errno(status);
Mark Fasheh6d8fc402006-10-06 11:54:33 -07001625 return status;
Mark Fashehccd979b2005-12-15 14:31:24 -08001626 }
1627
1628 dirfe = (struct ocfs2_dinode *) parent_fe_bh->b_data;
Mark Fasheh198a1ca2008-11-20 17:54:57 -08001629 if (!ocfs2_read_links_count(dirfe)) {
Mark Fashehccd979b2005-12-15 14:31:24 -08001630 /* can't make a file in a deleted directory. */
1631 status = -ENOENT;
1632 goto bail;
1633 }
1634
1635 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
1636 dentry->d_name.len);
1637 if (status)
1638 goto bail;
1639
1640 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_fe_bh,
1641 dentry->d_name.name,
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001642 dentry->d_name.len, &lookup);
Mark Fashehccd979b2005-12-15 14:31:24 -08001643 if (status < 0) {
1644 mlog_errno(status);
1645 goto bail;
1646 }
1647
Mark Fashehda5cbf22006-10-06 18:34:35 -07001648 status = ocfs2_reserve_new_inode(osb, &inode_ac);
Mark Fashehccd979b2005-12-15 14:31:24 -08001649 if (status < 0) {
1650 if (status != -ENOSPC)
1651 mlog_errno(status);
1652 goto bail;
1653 }
1654
Tiger Yangf5d36202008-11-14 11:15:44 +08001655 inode = ocfs2_get_init_inode(dir, S_IFLNK | S_IRWXUGO);
1656 if (!inode) {
1657 status = -ENOMEM;
1658 mlog_errno(status);
1659 goto bail;
1660 }
1661
Tiger Yang534eadd2008-11-14 11:16:41 +08001662 /* get security xattr */
Eric Paris2a7dba32011-02-01 11:05:39 -05001663 status = ocfs2_init_security_get(inode, dir, &dentry->d_name, &si);
Tiger Yang534eadd2008-11-14 11:16:41 +08001664 if (status) {
1665 if (status == -EOPNOTSUPP)
1666 si.enable = 0;
1667 else {
1668 mlog_errno(status);
Mark Fashehccd979b2005-12-15 14:31:24 -08001669 goto bail;
1670 }
1671 }
1672
Tiger Yang534eadd2008-11-14 11:16:41 +08001673 /* calculate meta data/clusters for setting security xattr */
1674 if (si.enable) {
1675 status = ocfs2_calc_security_init(dir, &si, &want_clusters,
1676 &xattr_credits, &xattr_ac);
1677 if (status < 0) {
1678 mlog_errno(status);
1679 goto bail;
1680 }
1681 }
1682
1683 /* don't reserve bitmap space for fast symlinks. */
1684 if (l > ocfs2_fast_symlink_chars(sb))
1685 want_clusters += 1;
1686
1687 status = ocfs2_reserve_clusters(osb, want_clusters, &data_ac);
1688 if (status < 0) {
1689 if (status != -ENOSPC)
1690 mlog_errno(status);
1691 goto bail;
1692 }
1693
1694 handle = ocfs2_start_trans(osb, credits + xattr_credits);
Mark Fashehccd979b2005-12-15 14:31:24 -08001695 if (IS_ERR(handle)) {
1696 status = PTR_ERR(handle);
1697 handle = NULL;
1698 mlog_errno(status);
1699 goto bail;
1700 }
1701
Joel Becker547ba7c2010-05-10 11:56:52 -07001702 /* Starting to change things, restart is no longer possible. */
1703 ocfs2_block_signals(&oldset);
1704 did_block_signals = 1;
1705
Christoph Hellwig63936dd2010-03-03 09:05:01 -05001706 status = dquot_alloc_inode(inode);
1707 if (status)
Jan Karaa90714c2008-10-09 19:38:40 +02001708 goto bail;
Jan Karaa90714c2008-10-09 19:38:40 +02001709 did_quota_inode = 1;
1710
Tao Ma8990e442011-02-23 22:45:26 +08001711 trace_ocfs2_symlink_create(dir, dentry, dentry->d_name.len,
1712 dentry->d_name.name,
1713 (unsigned long long)OCFS2_I(dir)->ip_blkno,
1714 inode->i_mode);
Tao Ma19bd3412009-08-18 11:44:10 +08001715
1716 status = ocfs2_mknod_locked(osb, dir, inode,
Tiger Yangf5d36202008-11-14 11:15:44 +08001717 0, &new_fe_bh, parent_fe_bh, handle,
1718 inode_ac);
Mark Fashehccd979b2005-12-15 14:31:24 -08001719 if (status < 0) {
1720 mlog_errno(status);
1721 goto bail;
1722 }
1723
1724 fe = (struct ocfs2_dinode *) new_fe_bh->b_data;
1725 inode->i_rdev = 0;
1726 newsize = l - 1;
1727 if (l > ocfs2_fast_symlink_chars(sb)) {
Mark Fashehdcd05382007-01-16 11:32:23 -08001728 u32 offset = 0;
1729
Mark Fashehccd979b2005-12-15 14:31:24 -08001730 inode->i_op = &ocfs2_symlink_inode_operations;
Christoph Hellwig5dd40562010-03-03 09:05:00 -05001731 status = dquot_alloc_space_nodirty(inode,
1732 ocfs2_clusters_to_bytes(osb->sb, 1));
1733 if (status)
Jan Karaa90714c2008-10-09 19:38:40 +02001734 goto bail;
Jan Karaa90714c2008-10-09 19:38:40 +02001735 did_quota = 1;
Tao Ma0eb8d472008-08-18 17:38:45 +08001736 status = ocfs2_add_inode_data(osb, inode, &offset, 1, 0,
1737 new_fe_bh,
1738 handle, data_ac, NULL,
1739 NULL);
Mark Fashehccd979b2005-12-15 14:31:24 -08001740 if (status < 0) {
1741 if (status != -ENOSPC && status != -EINTR) {
Mark Fashehb06970532006-03-03 10:24:33 -08001742 mlog(ML_ERROR,
1743 "Failed to extend file to %llu\n",
1744 (unsigned long long)newsize);
Mark Fashehccd979b2005-12-15 14:31:24 -08001745 mlog_errno(status);
1746 status = -ENOSPC;
1747 }
1748 goto bail;
1749 }
1750 i_size_write(inode, newsize);
Mark Fasheh8110b072007-03-22 16:53:23 -07001751 inode->i_blocks = ocfs2_inode_sector_count(inode);
Mark Fashehccd979b2005-12-15 14:31:24 -08001752 } else {
1753 inode->i_op = &ocfs2_fast_symlink_inode_operations;
1754 memcpy((char *) fe->id2.i_symlink, symname, l);
1755 i_size_write(inode, newsize);
1756 inode->i_blocks = 0;
1757 }
1758
1759 status = ocfs2_mark_inode_dirty(handle, inode, new_fe_bh);
1760 if (status < 0) {
1761 mlog_errno(status);
1762 goto bail;
1763 }
1764
1765 if (!ocfs2_inode_is_fast_symlink(inode)) {
1766 status = ocfs2_create_symlink_data(osb, handle, inode,
1767 symname);
1768 if (status < 0) {
1769 mlog_errno(status);
1770 goto bail;
1771 }
1772 }
1773
Tiger Yang534eadd2008-11-14 11:16:41 +08001774 if (si.enable) {
1775 status = ocfs2_init_security_set(handle, inode, new_fe_bh, &si,
1776 xattr_ac, data_ac);
1777 if (status < 0) {
1778 mlog_errno(status);
1779 goto bail;
1780 }
1781 }
1782
Mark Fasheha9743fc2010-04-23 11:42:22 -07001783 /*
1784 * Do this before adding the entry to the directory. We add
1785 * also set d_op after success so that ->d_iput() will cleanup
1786 * the dentry lock even if ocfs2_add_entry() fails below.
1787 */
1788 status = ocfs2_dentry_attach_lock(dentry, inode, OCFS2_I(dir)->ip_blkno);
1789 if (status) {
1790 mlog_errno(status);
1791 goto bail;
1792 }
Mark Fasheha9743fc2010-04-23 11:42:22 -07001793
Mark Fashehccd979b2005-12-15 14:31:24 -08001794 status = ocfs2_add_entry(handle, dentry, inode,
1795 le64_to_cpu(fe->i_blkno), parent_fe_bh,
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001796 &lookup);
Mark Fashehccd979b2005-12-15 14:31:24 -08001797 if (status < 0) {
1798 mlog_errno(status);
1799 goto bail;
1800 }
1801
1802 insert_inode_hash(inode);
Mark Fashehccd979b2005-12-15 14:31:24 -08001803 d_instantiate(dentry, inode);
1804bail:
Jan Karaa90714c2008-10-09 19:38:40 +02001805 if (status < 0 && did_quota)
Christoph Hellwig5dd40562010-03-03 09:05:00 -05001806 dquot_free_space_nodirty(inode,
Jan Karaa90714c2008-10-09 19:38:40 +02001807 ocfs2_clusters_to_bytes(osb->sb, 1));
1808 if (status < 0 && did_quota_inode)
Christoph Hellwig63936dd2010-03-03 09:05:01 -05001809 dquot_free_inode(inode);
Mark Fashehccd979b2005-12-15 14:31:24 -08001810 if (handle)
Mark Fasheh02dc1af2006-10-09 16:48:10 -07001811 ocfs2_commit_trans(osb, handle);
Mark Fasheh6d8fc402006-10-06 11:54:33 -07001812
Mark Fashehe63aecb62007-10-18 15:30:42 -07001813 ocfs2_inode_unlock(dir, 1);
Joel Becker547ba7c2010-05-10 11:56:52 -07001814 if (did_block_signals)
1815 ocfs2_unblock_signals(&oldset);
Mark Fasheh6d8fc402006-10-06 11:54:33 -07001816
Mark Fasheha81cb882008-10-07 14:25:16 -07001817 brelse(new_fe_bh);
1818 brelse(parent_fe_bh);
Tiger Yang534eadd2008-11-14 11:16:41 +08001819 kfree(si.name);
1820 kfree(si.value);
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001821 ocfs2_free_dir_lookup_result(&lookup);
Mark Fashehccd979b2005-12-15 14:31:24 -08001822 if (inode_ac)
1823 ocfs2_free_alloc_context(inode_ac);
1824 if (data_ac)
1825 ocfs2_free_alloc_context(data_ac);
Tiger Yang534eadd2008-11-14 11:16:41 +08001826 if (xattr_ac)
1827 ocfs2_free_alloc_context(xattr_ac);
Tiger Yangf5d36202008-11-14 11:15:44 +08001828 if ((status < 0) && inode) {
Li Dongyangab41fdc2010-04-22 16:11:25 +08001829 OCFS2_I(inode)->ip_flags |= OCFS2_INODE_SKIP_ORPHAN_DIR;
Tiger Yangf5d36202008-11-14 11:15:44 +08001830 clear_nlink(inode);
Mark Fashehccd979b2005-12-15 14:31:24 -08001831 iput(inode);
Tiger Yangf5d36202008-11-14 11:15:44 +08001832 }
Mark Fashehccd979b2005-12-15 14:31:24 -08001833
Tao Mac1e8d352011-03-07 16:43:21 +08001834 if (status)
1835 mlog_errno(status);
Mark Fashehccd979b2005-12-15 14:31:24 -08001836
1837 return status;
1838}
1839
Mark Fashehccd979b2005-12-15 14:31:24 -08001840static int ocfs2_blkno_stringify(u64 blkno, char *name)
1841{
1842 int status, namelen;
1843
Mark Fashehb06970532006-03-03 10:24:33 -08001844 namelen = snprintf(name, OCFS2_ORPHAN_NAMELEN + 1, "%016llx",
1845 (long long)blkno);
Mark Fashehccd979b2005-12-15 14:31:24 -08001846 if (namelen <= 0) {
1847 if (namelen)
1848 status = namelen;
1849 else
1850 status = -EINVAL;
1851 mlog_errno(status);
1852 goto bail;
1853 }
1854 if (namelen != OCFS2_ORPHAN_NAMELEN) {
1855 status = -EINVAL;
1856 mlog_errno(status);
1857 goto bail;
1858 }
1859
Tao Ma8990e442011-02-23 22:45:26 +08001860 trace_ocfs2_blkno_stringify(blkno, name, namelen);
Mark Fashehccd979b2005-12-15 14:31:24 -08001861
1862 status = 0;
1863bail:
Tao Mac1e8d352011-03-07 16:43:21 +08001864 if (status < 0)
1865 mlog_errno(status);
Mark Fashehccd979b2005-12-15 14:31:24 -08001866 return status;
1867}
1868
Mark Fashehdd43bcd2010-08-13 15:15:18 -07001869static int ocfs2_lookup_lock_orphan_dir(struct ocfs2_super *osb,
1870 struct inode **ret_orphan_dir,
1871 struct buffer_head **ret_orphan_dir_bh)
1872{
1873 struct inode *orphan_dir_inode;
1874 struct buffer_head *orphan_dir_bh = NULL;
1875 int ret = 0;
1876
1877 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
1878 ORPHAN_DIR_SYSTEM_INODE,
1879 osb->slot_num);
1880 if (!orphan_dir_inode) {
1881 ret = -ENOENT;
1882 mlog_errno(ret);
1883 return ret;
1884 }
1885
1886 mutex_lock(&orphan_dir_inode->i_mutex);
1887
1888 ret = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
1889 if (ret < 0) {
1890 mutex_unlock(&orphan_dir_inode->i_mutex);
1891 iput(orphan_dir_inode);
1892
1893 mlog_errno(ret);
1894 return ret;
1895 }
1896
1897 *ret_orphan_dir = orphan_dir_inode;
1898 *ret_orphan_dir_bh = orphan_dir_bh;
1899
1900 return 0;
1901}
1902
1903static int __ocfs2_prepare_orphan_dir(struct inode *orphan_dir_inode,
1904 struct buffer_head *orphan_dir_bh,
1905 u64 blkno,
1906 char *name,
1907 struct ocfs2_dir_lookup_result *lookup)
1908{
1909 int ret;
1910 struct ocfs2_super *osb = OCFS2_SB(orphan_dir_inode->i_sb);
1911
1912 ret = ocfs2_blkno_stringify(blkno, name);
1913 if (ret < 0) {
1914 mlog_errno(ret);
1915 return ret;
1916 }
1917
1918 ret = ocfs2_prepare_dir_for_insert(osb, orphan_dir_inode,
1919 orphan_dir_bh, name,
1920 OCFS2_ORPHAN_NAMELEN, lookup);
1921 if (ret < 0) {
1922 mlog_errno(ret);
1923 return ret;
1924 }
1925
1926 return 0;
1927}
1928
1929/**
1930 * ocfs2_prepare_orphan_dir() - Prepare an orphan directory for
1931 * insertion of an orphan.
1932 * @osb: ocfs2 file system
1933 * @ret_orphan_dir: Orphan dir inode - returned locked!
1934 * @blkno: Actual block number of the inode to be inserted into orphan dir.
1935 * @lookup: dir lookup result, to be passed back into functions like
1936 * ocfs2_orphan_add
1937 *
1938 * Returns zero on success and the ret_orphan_dir, name and lookup
1939 * fields will be populated.
1940 *
1941 * Returns non-zero on failure.
1942 */
Mark Fashehccd979b2005-12-15 14:31:24 -08001943static int ocfs2_prepare_orphan_dir(struct ocfs2_super *osb,
Mark Fasheh5098c272006-10-05 18:12:57 -07001944 struct inode **ret_orphan_dir,
Tao Ma19bd3412009-08-18 11:44:10 +08001945 u64 blkno,
Mark Fashehccd979b2005-12-15 14:31:24 -08001946 char *name,
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001947 struct ocfs2_dir_lookup_result *lookup)
Mark Fashehccd979b2005-12-15 14:31:24 -08001948{
Mark Fashehdd43bcd2010-08-13 15:15:18 -07001949 struct inode *orphan_dir_inode = NULL;
Mark Fashehccd979b2005-12-15 14:31:24 -08001950 struct buffer_head *orphan_dir_bh = NULL;
Mark Fashehdd43bcd2010-08-13 15:15:18 -07001951 int ret = 0;
Mark Fashehccd979b2005-12-15 14:31:24 -08001952
Mark Fashehdd43bcd2010-08-13 15:15:18 -07001953 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir_inode,
1954 &orphan_dir_bh);
1955 if (ret < 0) {
1956 mlog_errno(ret);
1957 return ret;
Mark Fashehccd979b2005-12-15 14:31:24 -08001958 }
1959
Mark Fashehdd43bcd2010-08-13 15:15:18 -07001960 ret = __ocfs2_prepare_orphan_dir(orphan_dir_inode, orphan_dir_bh,
1961 blkno, name, lookup);
1962 if (ret < 0) {
1963 mlog_errno(ret);
1964 goto out;
Mark Fashehccd979b2005-12-15 14:31:24 -08001965 }
1966
Mark Fasheh5098c272006-10-05 18:12:57 -07001967 *ret_orphan_dir = orphan_dir_inode;
1968
Mark Fashehdd43bcd2010-08-13 15:15:18 -07001969out:
1970 brelse(orphan_dir_bh);
1971
1972 if (ret) {
1973 ocfs2_inode_unlock(orphan_dir_inode, 1);
Mark Fasheh5098c272006-10-05 18:12:57 -07001974 mutex_unlock(&orphan_dir_inode->i_mutex);
Mark Fashehccd979b2005-12-15 14:31:24 -08001975 iput(orphan_dir_inode);
Mark Fasheh5098c272006-10-05 18:12:57 -07001976 }
Mark Fashehccd979b2005-12-15 14:31:24 -08001977
Tao Mac1e8d352011-03-07 16:43:21 +08001978 if (ret)
1979 mlog_errno(ret);
Mark Fashehdd43bcd2010-08-13 15:15:18 -07001980 return ret;
Mark Fashehccd979b2005-12-15 14:31:24 -08001981}
1982
1983static int ocfs2_orphan_add(struct ocfs2_super *osb,
Mark Fasheh1fabe142006-10-09 18:11:45 -07001984 handle_t *handle,
Mark Fashehccd979b2005-12-15 14:31:24 -08001985 struct inode *inode,
Tristan Ye3939fda2010-03-19 09:21:09 +08001986 struct buffer_head *fe_bh,
Mark Fashehccd979b2005-12-15 14:31:24 -08001987 char *name,
Mark Fasheh4a12ca32008-11-12 15:43:34 -08001988 struct ocfs2_dir_lookup_result *lookup,
Mark Fasheh5098c272006-10-05 18:12:57 -07001989 struct inode *orphan_dir_inode)
Mark Fashehccd979b2005-12-15 14:31:24 -08001990{
Mark Fashehccd979b2005-12-15 14:31:24 -08001991 struct buffer_head *orphan_dir_bh = NULL;
1992 int status = 0;
1993 struct ocfs2_dinode *orphan_fe;
Tristan Ye3939fda2010-03-19 09:21:09 +08001994 struct ocfs2_dinode *fe = (struct ocfs2_dinode *) fe_bh->b_data;
Mark Fashehccd979b2005-12-15 14:31:24 -08001995
Tao Ma8990e442011-02-23 22:45:26 +08001996 trace_ocfs2_orphan_add_begin(
1997 (unsigned long long)OCFS2_I(inode)->ip_blkno);
Mark Fashehccd979b2005-12-15 14:31:24 -08001998
Joel Beckerb657c952008-11-13 14:49:11 -08001999 status = ocfs2_read_inode_block(orphan_dir_inode, &orphan_dir_bh);
Mark Fashehccd979b2005-12-15 14:31:24 -08002000 if (status < 0) {
2001 mlog_errno(status);
2002 goto leave;
2003 }
2004
Joel Becker0cf2f762009-02-12 16:41:25 -08002005 status = ocfs2_journal_access_di(handle,
2006 INODE_CACHE(orphan_dir_inode),
2007 orphan_dir_bh,
Joel Becker13723d02008-10-17 19:25:01 -07002008 OCFS2_JOURNAL_ACCESS_WRITE);
Mark Fashehccd979b2005-12-15 14:31:24 -08002009 if (status < 0) {
2010 mlog_errno(status);
2011 goto leave;
2012 }
2013
2014 /* we're a cluster, and nlink can change on disk from
2015 * underneath us... */
2016 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2017 if (S_ISDIR(inode->i_mode))
Mark Fasheh198a1ca2008-11-20 17:54:57 -08002018 ocfs2_add_links_count(orphan_fe, 1);
Miklos Szeredibfe86842011-10-28 14:13:29 +02002019 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
Joel Beckerec20cec2010-03-19 14:13:52 -07002020 ocfs2_journal_dirty(handle, orphan_dir_bh);
Mark Fashehccd979b2005-12-15 14:31:24 -08002021
2022 status = __ocfs2_add_entry(handle, orphan_dir_inode, name,
2023 OCFS2_ORPHAN_NAMELEN, inode,
2024 OCFS2_I(inode)->ip_blkno,
Mark Fasheh4a12ca32008-11-12 15:43:34 -08002025 orphan_dir_bh, lookup);
Mark Fashehccd979b2005-12-15 14:31:24 -08002026 if (status < 0) {
2027 mlog_errno(status);
2028 goto leave;
2029 }
2030
Tristan Ye3939fda2010-03-19 09:21:09 +08002031 /*
2032 * We're going to journal the change of i_flags and i_orphaned_slot.
2033 * It's safe anyway, though some callers may duplicate the journaling.
2034 * Journaling within the func just make the logic look more
2035 * straightforward.
2036 */
2037 status = ocfs2_journal_access_di(handle,
2038 INODE_CACHE(inode),
2039 fe_bh,
2040 OCFS2_JOURNAL_ACCESS_WRITE);
2041 if (status < 0) {
2042 mlog_errno(status);
2043 goto leave;
2044 }
2045
Mark Fashehccd979b2005-12-15 14:31:24 -08002046 le32_add_cpu(&fe->i_flags, OCFS2_ORPHANED_FL);
Li Dongyangd4cd1872010-04-22 16:11:19 +08002047 OCFS2_I(inode)->ip_flags &= ~OCFS2_INODE_SKIP_ORPHAN_DIR;
Mark Fashehccd979b2005-12-15 14:31:24 -08002048
2049 /* Record which orphan dir our inode now resides
2050 * in. delete_inode will use this to determine which orphan
2051 * dir to lock. */
Tiger Yang50008632007-03-20 16:01:38 -07002052 fe->i_orphaned_slot = cpu_to_le16(osb->slot_num);
Mark Fashehccd979b2005-12-15 14:31:24 -08002053
Tristan Ye3939fda2010-03-19 09:21:09 +08002054 ocfs2_journal_dirty(handle, fe_bh);
2055
Tao Ma8990e442011-02-23 22:45:26 +08002056 trace_ocfs2_orphan_add_end((unsigned long long)OCFS2_I(inode)->ip_blkno,
2057 osb->slot_num);
Mark Fashehccd979b2005-12-15 14:31:24 -08002058
2059leave:
Mark Fasheha81cb882008-10-07 14:25:16 -07002060 brelse(orphan_dir_bh);
Mark Fashehccd979b2005-12-15 14:31:24 -08002061
Tao Mac1e8d352011-03-07 16:43:21 +08002062 if (status)
2063 mlog_errno(status);
Mark Fashehccd979b2005-12-15 14:31:24 -08002064 return status;
2065}
2066
2067/* unlike orphan_add, we expect the orphan dir to already be locked here. */
2068int ocfs2_orphan_del(struct ocfs2_super *osb,
Mark Fasheh1fabe142006-10-09 18:11:45 -07002069 handle_t *handle,
Mark Fashehccd979b2005-12-15 14:31:24 -08002070 struct inode *orphan_dir_inode,
2071 struct inode *inode,
2072 struct buffer_head *orphan_dir_bh)
2073{
2074 char name[OCFS2_ORPHAN_NAMELEN + 1];
2075 struct ocfs2_dinode *orphan_fe;
2076 int status = 0;
Mark Fasheh4a12ca32008-11-12 15:43:34 -08002077 struct ocfs2_dir_lookup_result lookup = { NULL, };
Mark Fashehccd979b2005-12-15 14:31:24 -08002078
Mark Fashehccd979b2005-12-15 14:31:24 -08002079 status = ocfs2_blkno_stringify(OCFS2_I(inode)->ip_blkno, name);
2080 if (status < 0) {
2081 mlog_errno(status);
2082 goto leave;
2083 }
2084
Tao Ma8990e442011-02-23 22:45:26 +08002085 trace_ocfs2_orphan_del(
2086 (unsigned long long)OCFS2_I(orphan_dir_inode)->ip_blkno,
2087 name, OCFS2_ORPHAN_NAMELEN);
Mark Fashehccd979b2005-12-15 14:31:24 -08002088
2089 /* find it's spot in the orphan directory */
Mark Fasheh4a12ca32008-11-12 15:43:34 -08002090 status = ocfs2_find_entry(name, OCFS2_ORPHAN_NAMELEN, orphan_dir_inode,
2091 &lookup);
2092 if (status) {
Mark Fashehccd979b2005-12-15 14:31:24 -08002093 mlog_errno(status);
2094 goto leave;
2095 }
2096
2097 /* remove it from the orphan directory */
Mark Fasheh4a12ca32008-11-12 15:43:34 -08002098 status = ocfs2_delete_entry(handle, orphan_dir_inode, &lookup);
Mark Fashehccd979b2005-12-15 14:31:24 -08002099 if (status < 0) {
2100 mlog_errno(status);
2101 goto leave;
2102 }
2103
Joel Becker0cf2f762009-02-12 16:41:25 -08002104 status = ocfs2_journal_access_di(handle,
2105 INODE_CACHE(orphan_dir_inode),
2106 orphan_dir_bh,
Joel Becker13723d02008-10-17 19:25:01 -07002107 OCFS2_JOURNAL_ACCESS_WRITE);
Mark Fashehccd979b2005-12-15 14:31:24 -08002108 if (status < 0) {
2109 mlog_errno(status);
2110 goto leave;
2111 }
2112
2113 /* do the i_nlink dance! :) */
2114 orphan_fe = (struct ocfs2_dinode *) orphan_dir_bh->b_data;
2115 if (S_ISDIR(inode->i_mode))
Mark Fasheh198a1ca2008-11-20 17:54:57 -08002116 ocfs2_add_links_count(orphan_fe, -1);
Miklos Szeredibfe86842011-10-28 14:13:29 +02002117 set_nlink(orphan_dir_inode, ocfs2_read_links_count(orphan_fe));
Joel Beckerec20cec2010-03-19 14:13:52 -07002118 ocfs2_journal_dirty(handle, orphan_dir_bh);
Mark Fashehccd979b2005-12-15 14:31:24 -08002119
2120leave:
Mark Fasheh4a12ca32008-11-12 15:43:34 -08002121 ocfs2_free_dir_lookup_result(&lookup);
Mark Fashehccd979b2005-12-15 14:31:24 -08002122
Tao Mac1e8d352011-03-07 16:43:21 +08002123 if (status)
2124 mlog_errno(status);
Mark Fashehccd979b2005-12-15 14:31:24 -08002125 return status;
2126}
2127
Mark Fasheh97b8f4a2010-08-13 15:15:19 -07002128/**
Lucas De Marchi25985ed2011-03-30 22:57:33 -03002129 * ocfs2_prep_new_orphaned_file() - Prepare the orphan dir to receive a newly
Mark Fasheh97b8f4a2010-08-13 15:15:19 -07002130 * allocated file. This is different from the typical 'add to orphan dir'
2131 * operation in that the inode does not yet exist. This is a problem because
2132 * the orphan dir stringifies the inode block number to come up with it's
2133 * dirent. Obviously if the inode does not yet exist we have a chicken and egg
2134 * problem. This function works around it by calling deeper into the orphan
2135 * and suballoc code than other callers. Use this only by necessity.
2136 * @dir: The directory which this inode will ultimately wind up under - not the
2137 * orphan dir!
2138 * @dir_bh: buffer_head the @dir inode block
2139 * @orphan_name: string of length (CFS2_ORPHAN_NAMELEN + 1). Will be filled
2140 * with the string to be used for orphan dirent. Pass back to the orphan dir
2141 * code.
2142 * @ret_orphan_dir: orphan dir inode returned to be passed back into orphan
2143 * dir code.
2144 * @ret_di_blkno: block number where the new inode will be allocated.
2145 * @orphan_insert: Dir insert context to be passed back into orphan dir code.
2146 * @ret_inode_ac: Inode alloc context to be passed back to the allocator.
2147 *
2148 * Returns zero on success and the ret_orphan_dir, name and lookup
2149 * fields will be populated.
2150 *
2151 * Returns non-zero on failure.
2152 */
2153static int ocfs2_prep_new_orphaned_file(struct inode *dir,
2154 struct buffer_head *dir_bh,
2155 char *orphan_name,
2156 struct inode **ret_orphan_dir,
2157 u64 *ret_di_blkno,
2158 struct ocfs2_dir_lookup_result *orphan_insert,
2159 struct ocfs2_alloc_context **ret_inode_ac)
2160{
2161 int ret;
2162 u64 di_blkno;
2163 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2164 struct inode *orphan_dir = NULL;
2165 struct buffer_head *orphan_dir_bh = NULL;
2166 struct ocfs2_alloc_context *inode_ac = NULL;
2167
2168 ret = ocfs2_lookup_lock_orphan_dir(osb, &orphan_dir, &orphan_dir_bh);
2169 if (ret < 0) {
2170 mlog_errno(ret);
2171 return ret;
2172 }
2173
2174 /* reserve an inode spot */
2175 ret = ocfs2_reserve_new_inode(osb, &inode_ac);
2176 if (ret < 0) {
2177 if (ret != -ENOSPC)
2178 mlog_errno(ret);
2179 goto out;
2180 }
2181
2182 ret = ocfs2_find_new_inode_loc(dir, dir_bh, inode_ac,
2183 &di_blkno);
2184 if (ret) {
2185 mlog_errno(ret);
2186 goto out;
2187 }
2188
2189 ret = __ocfs2_prepare_orphan_dir(orphan_dir, orphan_dir_bh,
2190 di_blkno, orphan_name, orphan_insert);
2191 if (ret < 0) {
2192 mlog_errno(ret);
2193 goto out;
2194 }
2195
2196out:
2197 if (ret == 0) {
2198 *ret_orphan_dir = orphan_dir;
2199 *ret_di_blkno = di_blkno;
2200 *ret_inode_ac = inode_ac;
2201 /*
2202 * orphan_name and orphan_insert are already up to
2203 * date via prepare_orphan_dir
2204 */
2205 } else {
2206 /* Unroll reserve_new_inode* */
2207 if (inode_ac)
2208 ocfs2_free_alloc_context(inode_ac);
2209
2210 /* Unroll orphan dir locking */
2211 mutex_unlock(&orphan_dir->i_mutex);
2212 ocfs2_inode_unlock(orphan_dir, 1);
2213 iput(orphan_dir);
2214 }
2215
2216 brelse(orphan_dir_bh);
2217
2218 return 0;
2219}
2220
Tao Mabc13d342009-08-18 11:44:14 +08002221int ocfs2_create_inode_in_orphan(struct inode *dir,
2222 int mode,
2223 struct inode **new_inode)
2224{
2225 int status, did_quota_inode = 0;
2226 struct inode *inode = NULL;
2227 struct inode *orphan_dir = NULL;
2228 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2229 struct ocfs2_dinode *di = NULL;
2230 handle_t *handle = NULL;
2231 char orphan_name[OCFS2_ORPHAN_NAMELEN + 1];
2232 struct buffer_head *parent_di_bh = NULL;
2233 struct buffer_head *new_di_bh = NULL;
2234 struct ocfs2_alloc_context *inode_ac = NULL;
2235 struct ocfs2_dir_lookup_result orphan_insert = { NULL, };
Mark Fasheh97b8f4a2010-08-13 15:15:19 -07002236 u64 uninitialized_var(di_blkno), suballoc_loc;
2237 u16 suballoc_bit;
Tao Mabc13d342009-08-18 11:44:14 +08002238
2239 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2240 if (status < 0) {
2241 if (status != -ENOENT)
2242 mlog_errno(status);
2243 return status;
2244 }
2245
Mark Fasheh97b8f4a2010-08-13 15:15:19 -07002246 status = ocfs2_prep_new_orphaned_file(dir, parent_di_bh,
2247 orphan_name, &orphan_dir,
2248 &di_blkno, &orphan_insert, &inode_ac);
Tao Mabc13d342009-08-18 11:44:14 +08002249 if (status < 0) {
2250 if (status != -ENOSPC)
2251 mlog_errno(status);
2252 goto leave;
2253 }
2254
2255 inode = ocfs2_get_init_inode(dir, mode);
2256 if (!inode) {
2257 status = -ENOMEM;
2258 mlog_errno(status);
2259 goto leave;
2260 }
2261
2262 handle = ocfs2_start_trans(osb, ocfs2_mknod_credits(osb->sb, 0, 0));
2263 if (IS_ERR(handle)) {
2264 status = PTR_ERR(handle);
2265 handle = NULL;
2266 mlog_errno(status);
2267 goto leave;
2268 }
2269
Christoph Hellwig63936dd2010-03-03 09:05:01 -05002270 status = dquot_alloc_inode(inode);
2271 if (status)
Tao Mabc13d342009-08-18 11:44:14 +08002272 goto leave;
Tao Mabc13d342009-08-18 11:44:14 +08002273 did_quota_inode = 1;
2274
Mark Fasheh97b8f4a2010-08-13 15:15:19 -07002275 status = ocfs2_claim_new_inode_at_loc(handle, dir, inode_ac,
2276 &suballoc_loc,
2277 &suballoc_bit, di_blkno);
Tao Mabc13d342009-08-18 11:44:14 +08002278 if (status < 0) {
2279 mlog_errno(status);
2280 goto leave;
2281 }
2282
Miklos Szeredi6d6b77f2011-10-28 14:13:28 +02002283 clear_nlink(inode);
Mark Fasheh97b8f4a2010-08-13 15:15:19 -07002284 /* do the real work now. */
2285 status = __ocfs2_mknod_locked(dir, inode,
2286 0, &new_di_bh, parent_di_bh, handle,
2287 inode_ac, di_blkno, suballoc_loc,
2288 suballoc_bit);
Tao Mabc13d342009-08-18 11:44:14 +08002289 if (status < 0) {
2290 mlog_errno(status);
2291 goto leave;
2292 }
2293
2294 di = (struct ocfs2_dinode *)new_di_bh->b_data;
Tristan Ye3939fda2010-03-19 09:21:09 +08002295 status = ocfs2_orphan_add(osb, handle, inode, new_di_bh, orphan_name,
Tao Mabc13d342009-08-18 11:44:14 +08002296 &orphan_insert, orphan_dir);
2297 if (status < 0) {
2298 mlog_errno(status);
2299 goto leave;
2300 }
2301
2302 /* get open lock so that only nodes can't remove it from orphan dir. */
2303 status = ocfs2_open_lock(inode);
2304 if (status < 0)
2305 mlog_errno(status);
2306
Tao Mac7d260a2009-12-18 10:24:54 +08002307 insert_inode_hash(inode);
Tao Mabc13d342009-08-18 11:44:14 +08002308leave:
2309 if (status < 0 && did_quota_inode)
Christoph Hellwig63936dd2010-03-03 09:05:01 -05002310 dquot_free_inode(inode);
Tao Mabc13d342009-08-18 11:44:14 +08002311 if (handle)
2312 ocfs2_commit_trans(osb, handle);
2313
2314 if (orphan_dir) {
2315 /* This was locked for us in ocfs2_prepare_orphan_dir() */
2316 ocfs2_inode_unlock(orphan_dir, 1);
2317 mutex_unlock(&orphan_dir->i_mutex);
2318 iput(orphan_dir);
2319 }
2320
Tao Mabc13d342009-08-18 11:44:14 +08002321 if ((status < 0) && inode) {
2322 clear_nlink(inode);
2323 iput(inode);
2324 }
2325
2326 if (inode_ac)
2327 ocfs2_free_alloc_context(inode_ac);
2328
2329 brelse(new_di_bh);
2330
2331 if (!status)
2332 *new_inode = inode;
2333
2334 ocfs2_free_dir_lookup_result(&orphan_insert);
2335
2336 ocfs2_inode_unlock(dir, 1);
2337 brelse(parent_di_bh);
2338 return status;
2339}
2340
2341int ocfs2_mv_orphaned_inode_to_new(struct inode *dir,
2342 struct inode *inode,
2343 struct dentry *dentry)
2344{
2345 int status = 0;
2346 struct buffer_head *parent_di_bh = NULL;
2347 handle_t *handle = NULL;
2348 struct ocfs2_super *osb = OCFS2_SB(dir->i_sb);
2349 struct ocfs2_dinode *dir_di, *di;
2350 struct inode *orphan_dir_inode = NULL;
2351 struct buffer_head *orphan_dir_bh = NULL;
2352 struct buffer_head *di_bh = NULL;
2353 struct ocfs2_dir_lookup_result lookup = { NULL, };
2354
Tao Ma8990e442011-02-23 22:45:26 +08002355 trace_ocfs2_mv_orphaned_inode_to_new(dir, dentry,
2356 dentry->d_name.len, dentry->d_name.name,
2357 (unsigned long long)OCFS2_I(dir)->ip_blkno,
2358 (unsigned long long)OCFS2_I(inode)->ip_blkno);
Tao Mabc13d342009-08-18 11:44:14 +08002359
2360 status = ocfs2_inode_lock(dir, &parent_di_bh, 1);
2361 if (status < 0) {
2362 if (status != -ENOENT)
2363 mlog_errno(status);
2364 return status;
2365 }
2366
2367 dir_di = (struct ocfs2_dinode *) parent_di_bh->b_data;
2368 if (!dir_di->i_links_count) {
2369 /* can't make a file in a deleted directory. */
2370 status = -ENOENT;
2371 goto leave;
2372 }
2373
2374 status = ocfs2_check_dir_for_entry(dir, dentry->d_name.name,
2375 dentry->d_name.len);
2376 if (status)
2377 goto leave;
2378
2379 /* get a spot inside the dir. */
2380 status = ocfs2_prepare_dir_for_insert(osb, dir, parent_di_bh,
2381 dentry->d_name.name,
2382 dentry->d_name.len, &lookup);
2383 if (status < 0) {
2384 mlog_errno(status);
2385 goto leave;
2386 }
2387
2388 orphan_dir_inode = ocfs2_get_system_file_inode(osb,
2389 ORPHAN_DIR_SYSTEM_INODE,
2390 osb->slot_num);
2391 if (!orphan_dir_inode) {
2392 status = -EEXIST;
2393 mlog_errno(status);
2394 goto leave;
2395 }
2396
2397 mutex_lock(&orphan_dir_inode->i_mutex);
2398
2399 status = ocfs2_inode_lock(orphan_dir_inode, &orphan_dir_bh, 1);
2400 if (status < 0) {
2401 mlog_errno(status);
2402 mutex_unlock(&orphan_dir_inode->i_mutex);
2403 iput(orphan_dir_inode);
2404 goto leave;
2405 }
2406
2407 status = ocfs2_read_inode_block(inode, &di_bh);
2408 if (status < 0) {
2409 mlog_errno(status);
2410 goto orphan_unlock;
2411 }
2412
2413 handle = ocfs2_start_trans(osb, ocfs2_rename_credits(osb->sb));
2414 if (IS_ERR(handle)) {
2415 status = PTR_ERR(handle);
2416 handle = NULL;
2417 mlog_errno(status);
2418 goto orphan_unlock;
2419 }
2420
2421 status = ocfs2_journal_access_di(handle, INODE_CACHE(inode),
2422 di_bh, OCFS2_JOURNAL_ACCESS_WRITE);
2423 if (status < 0) {
2424 mlog_errno(status);
2425 goto out_commit;
2426 }
2427
2428 status = ocfs2_orphan_del(osb, handle, orphan_dir_inode, inode,
2429 orphan_dir_bh);
2430 if (status < 0) {
2431 mlog_errno(status);
2432 goto out_commit;
2433 }
2434
2435 di = (struct ocfs2_dinode *)di_bh->b_data;
2436 le32_add_cpu(&di->i_flags, -OCFS2_ORPHANED_FL);
2437 di->i_orphaned_slot = 0;
Miklos Szeredibfe86842011-10-28 14:13:29 +02002438 set_nlink(inode, 1);
Tao Ma10cf1a02009-12-18 10:24:55 +08002439 ocfs2_set_links_count(di, inode->i_nlink);
Tao Mabc13d342009-08-18 11:44:14 +08002440 ocfs2_journal_dirty(handle, di_bh);
2441
2442 status = ocfs2_add_entry(handle, dentry, inode,
2443 OCFS2_I(inode)->ip_blkno, parent_di_bh,
2444 &lookup);
2445 if (status < 0) {
2446 mlog_errno(status);
2447 goto out_commit;
2448 }
2449
2450 status = ocfs2_dentry_attach_lock(dentry, inode,
2451 OCFS2_I(dir)->ip_blkno);
2452 if (status) {
2453 mlog_errno(status);
2454 goto out_commit;
2455 }
2456
Tao Mabc13d342009-08-18 11:44:14 +08002457 d_instantiate(dentry, inode);
2458 status = 0;
2459out_commit:
2460 ocfs2_commit_trans(osb, handle);
2461orphan_unlock:
2462 ocfs2_inode_unlock(orphan_dir_inode, 1);
2463 mutex_unlock(&orphan_dir_inode->i_mutex);
2464 iput(orphan_dir_inode);
2465leave:
2466
2467 ocfs2_inode_unlock(dir, 1);
2468
2469 brelse(di_bh);
2470 brelse(parent_di_bh);
2471 brelse(orphan_dir_bh);
2472
2473 ocfs2_free_dir_lookup_result(&lookup);
2474
Tao Mac1e8d352011-03-07 16:43:21 +08002475 if (status)
2476 mlog_errno(status);
Tao Mabc13d342009-08-18 11:44:14 +08002477
2478 return status;
2479}
2480
Arjan van de Ven92e1d5b2007-02-12 00:55:39 -08002481const struct inode_operations ocfs2_dir_iops = {
Mark Fashehccd979b2005-12-15 14:31:24 -08002482 .create = ocfs2_create,
2483 .lookup = ocfs2_lookup,
2484 .link = ocfs2_link,
2485 .unlink = ocfs2_unlink,
2486 .rmdir = ocfs2_unlink,
2487 .symlink = ocfs2_symlink,
2488 .mkdir = ocfs2_mkdir,
2489 .mknod = ocfs2_mknod,
2490 .rename = ocfs2_rename,
2491 .setattr = ocfs2_setattr,
2492 .getattr = ocfs2_getattr,
Tiger Yangd38eb8d2006-11-27 09:59:21 +08002493 .permission = ocfs2_permission,
Tiger Yangcf1d6c72008-08-18 17:11:00 +08002494 .setxattr = generic_setxattr,
2495 .getxattr = generic_getxattr,
2496 .listxattr = ocfs2_listxattr,
2497 .removexattr = generic_removexattr,
Tristan Ye55f49462009-12-17 18:42:16 +08002498 .fiemap = ocfs2_fiemap,
Christoph Hellwig4e34e712011-07-23 17:37:31 +02002499 .get_acl = ocfs2_iop_get_acl,
Mark Fashehccd979b2005-12-15 14:31:24 -08002500};