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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Nathan Scott7b718762005-11-02 14:58:39 +11002 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
Nathan Scott7b718762005-11-02 14:58:39 +11005 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * published by the Free Software Foundation.
8 *
Nathan Scott7b718762005-11-02 14:58:39 +11009 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 *
Nathan Scott7b718762005-11-02 14:58:39 +110014 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include "xfs.h"
19#include "xfs_fs.h"
Christoph Hellwigef14f0c2009-06-10 17:07:47 +020020#include "xfs_acl.h"
Nathan Scotta844f452005-11-02 14:38:42 +110021#include "xfs_bit.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include "xfs_log.h"
Nathan Scotta844f452005-11-02 14:38:42 +110023#include "xfs_inum.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include "xfs_trans.h"
25#include "xfs_sb.h"
26#include "xfs_ag.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include "xfs_alloc.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include "xfs_quota.h"
29#include "xfs_mount.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#include "xfs_bmap_btree.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#include "xfs_dinode.h"
32#include "xfs_inode.h"
33#include "xfs_bmap.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#include "xfs_rtalloc.h"
35#include "xfs_error.h"
36#include "xfs_itable.h"
37#include "xfs_rw.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#include "xfs_attr.h"
39#include "xfs_buf_item.h"
40#include "xfs_utils.h"
Christoph Hellwig739bfb22007-08-29 10:58:01 +100041#include "xfs_vnodeops.h"
Christoph Hellwigc4ed4242011-07-08 14:34:23 +020042#include "xfs_inode_item.h"
Christoph Hellwig0b1b2132009-12-14 23:14:59 +000043#include "xfs_trace.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070044
Randy Dunlap16f7e0f2006-01-11 12:17:46 -080045#include <linux/capability.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070046#include <linux/xattr.h>
47#include <linux/namei.h>
Christoph Hellwigef14f0c2009-06-10 17:07:47 +020048#include <linux/posix_acl.h>
Nathan Scott446ada42006-01-11 15:35:44 +110049#include <linux/security.h>
Eric Sandeenf35642e2008-11-28 14:23:35 +110050#include <linux/fiemap.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090051#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
Nathan Scott4aeb6642005-11-02 11:43:58 +110053/*
Christoph Hellwigf9581b12009-10-06 20:29:26 +000054 * Bring the timestamps in the XFS inode uptodate.
55 *
56 * Used before writing the inode to disk.
Christoph Hellwig42fe2b12006-01-11 15:35:17 +110057 */
58void
Christoph Hellwigf9581b12009-10-06 20:29:26 +000059xfs_synchronize_times(
Christoph Hellwig42fe2b12006-01-11 15:35:17 +110060 xfs_inode_t *ip)
61{
David Chinner01651642008-08-13 15:45:15 +100062 struct inode *inode = VFS_I(ip);
Christoph Hellwig42fe2b12006-01-11 15:35:17 +110063
Christoph Hellwigf9581b12009-10-06 20:29:26 +000064 ip->i_d.di_atime.t_sec = (__int32_t)inode->i_atime.tv_sec;
65 ip->i_d.di_atime.t_nsec = (__int32_t)inode->i_atime.tv_nsec;
66 ip->i_d.di_ctime.t_sec = (__int32_t)inode->i_ctime.tv_sec;
67 ip->i_d.di_ctime.t_nsec = (__int32_t)inode->i_ctime.tv_nsec;
68 ip->i_d.di_mtime.t_sec = (__int32_t)inode->i_mtime.tv_sec;
69 ip->i_d.di_mtime.t_nsec = (__int32_t)inode->i_mtime.tv_nsec;
Christoph Hellwig42fe2b12006-01-11 15:35:17 +110070}
71
72/*
Christoph Hellwig866e4ed2011-08-27 05:57:44 +000073 * If the linux inode is valid, mark it dirty, else mark the dirty state
74 * in the XFS inode to make sure we pick it up when reclaiming the inode.
David Chinner5d51eff2007-11-23 16:29:18 +110075 */
76void
77xfs_mark_inode_dirty_sync(
78 xfs_inode_t *ip)
79{
David Chinner01651642008-08-13 15:45:15 +100080 struct inode *inode = VFS_I(ip);
David Chinner5d51eff2007-11-23 16:29:18 +110081
Al Viroa4ffdde2010-06-02 17:38:30 -040082 if (!(inode->i_state & (I_WILL_FREE|I_FREEING)))
Christoph Hellwigaf048192008-03-06 13:46:43 +110083 mark_inode_dirty_sync(inode);
Christoph Hellwig866e4ed2011-08-27 05:57:44 +000084 else {
85 barrier();
86 ip->i_update_core = 1;
87 }
David Chinner5d51eff2007-11-23 16:29:18 +110088}
89
Christoph Hellwig66d834e2010-02-15 09:44:49 +000090void
91xfs_mark_inode_dirty(
92 xfs_inode_t *ip)
93{
94 struct inode *inode = VFS_I(ip);
95
Al Viroa4ffdde2010-06-02 17:38:30 -040096 if (!(inode->i_state & (I_WILL_FREE|I_FREEING)))
Christoph Hellwig66d834e2010-02-15 09:44:49 +000097 mark_inode_dirty(inode);
Christoph Hellwig866e4ed2011-08-27 05:57:44 +000098 else {
99 barrier();
100 ip->i_update_core = 1;
101 }
102
Christoph Hellwig66d834e2010-02-15 09:44:49 +0000103}
104
Mimi Zohar9d8f13b2011-06-06 15:29:25 -0400105
106int xfs_initxattrs(struct inode *inode, const struct xattr *xattr_array,
107 void *fs_info)
108{
109 const struct xattr *xattr;
110 struct xfs_inode *ip = XFS_I(inode);
111 int error = 0;
112
113 for (xattr = xattr_array; xattr->name != NULL; xattr++) {
114 error = xfs_attr_set(ip, xattr->name, xattr->value,
115 xattr->value_len, ATTR_SECURE);
116 if (error < 0)
117 break;
118 }
119 return error;
120}
121
David Chinner5d51eff2007-11-23 16:29:18 +1100122/*
Nathan Scott446ada42006-01-11 15:35:44 +1100123 * Hook in SELinux. This is not quite correct yet, what we really need
124 * here (as we do for default ACLs) is a mechanism by which creation of
125 * these attrs can be journalled at inode creation time (along with the
126 * inode, of course, such that log replay can't cause these to be lost).
127 */
Mimi Zohar9d8f13b2011-06-06 15:29:25 -0400128
Nathan Scott446ada42006-01-11 15:35:44 +1100129STATIC int
Nathan Scott416c6d52006-03-14 14:00:51 +1100130xfs_init_security(
Christoph Hellwigaf048192008-03-06 13:46:43 +1100131 struct inode *inode,
Eric Paris2a7dba32011-02-01 11:05:39 -0500132 struct inode *dir,
133 const struct qstr *qstr)
Nathan Scott446ada42006-01-11 15:35:44 +1100134{
Mimi Zohar9d8f13b2011-06-06 15:29:25 -0400135 return security_inode_init_security(inode, dir, qstr,
136 &xfs_initxattrs, NULL);
Nathan Scott446ada42006-01-11 15:35:44 +1100137}
138
Barry Naujok556b8b12008-04-10 12:22:07 +1000139static void
140xfs_dentry_to_name(
141 struct xfs_name *namep,
142 struct dentry *dentry)
143{
144 namep->name = dentry->d_name.name;
145 namep->len = dentry->d_name.len;
146}
147
David Chinner7989cb82007-02-10 18:34:56 +1100148STATIC void
Nathan Scott416c6d52006-03-14 14:00:51 +1100149xfs_cleanup_inode(
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000150 struct inode *dir,
Christoph Hellwigaf048192008-03-06 13:46:43 +1100151 struct inode *inode,
Christoph Hellwig8f112e32008-06-23 13:25:17 +1000152 struct dentry *dentry)
Yingping Lu3a69c7d2006-02-01 12:14:34 +1100153{
Barry Naujok556b8b12008-04-10 12:22:07 +1000154 struct xfs_name teardown;
Yingping Lu3a69c7d2006-02-01 12:14:34 +1100155
156 /* Oh, the horror.
Nathan Scott220b5282006-03-14 13:33:36 +1100157 * If we can't add the ACL or we fail in
Nathan Scott416c6d52006-03-14 14:00:51 +1100158 * xfs_init_security we must back out.
Yingping Lu3a69c7d2006-02-01 12:14:34 +1100159 * ENOSPC can hit here, among other things.
160 */
Barry Naujok556b8b12008-04-10 12:22:07 +1000161 xfs_dentry_to_name(&teardown, dentry);
Yingping Lu3a69c7d2006-02-01 12:14:34 +1100162
Christoph Hellwig8f112e32008-06-23 13:25:17 +1000163 xfs_remove(XFS_I(dir), &teardown, XFS_I(inode));
Christoph Hellwigaf048192008-03-06 13:46:43 +1100164 iput(inode);
Yingping Lu3a69c7d2006-02-01 12:14:34 +1100165}
166
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167STATIC int
Nathan Scott416c6d52006-03-14 14:00:51 +1100168xfs_vn_mknod(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169 struct inode *dir,
170 struct dentry *dentry,
Al Viro1a67aaf2011-07-26 01:52:52 -0400171 umode_t mode,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700172 dev_t rdev)
173{
Christoph Hellwigdb0bb7b2008-03-06 13:44:35 +1100174 struct inode *inode;
Christoph Hellwig979ebab2008-03-06 13:46:05 +1100175 struct xfs_inode *ip = NULL;
Christoph Hellwigef14f0c2009-06-10 17:07:47 +0200176 struct posix_acl *default_acl = NULL;
Barry Naujok556b8b12008-04-10 12:22:07 +1000177 struct xfs_name name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700178 int error;
179
180 /*
181 * Irix uses Missed'em'V split, but doesn't want to see
182 * the upper 5 bits of (14bit) major.
183 */
Christoph Hellwig517b5e82009-02-09 08:38:02 +0100184 if (S_ISCHR(mode) || S_ISBLK(mode)) {
185 if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff))
186 return -EINVAL;
187 rdev = sysv_encode_dev(rdev);
188 } else {
189 rdev = 0;
190 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700191
Christoph Hellwigef14f0c2009-06-10 17:07:47 +0200192 if (IS_POSIXACL(dir)) {
193 default_acl = xfs_get_acl(dir, ACL_TYPE_DEFAULT);
194 if (IS_ERR(default_acl))
Al Viroc46a1312011-06-05 11:12:31 +0000195 return PTR_ERR(default_acl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700196
Christoph Hellwige83f1eb2009-06-12 11:19:11 -0400197 if (!default_acl)
198 mode &= ~current_umask();
Christoph Hellwigef14f0c2009-06-10 17:07:47 +0200199 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700200
Christoph Hellwig517b5e82009-02-09 08:38:02 +0100201 xfs_dentry_to_name(&name, dentry);
Christoph Hellwig6c77b0e2010-10-06 18:41:17 +0000202 error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip);
Christoph Hellwigdb0bb7b2008-03-06 13:44:35 +1100203 if (unlikely(error))
204 goto out_free_acl;
Nathan Scott446ada42006-01-11 15:35:44 +1100205
David Chinner01651642008-08-13 15:45:15 +1000206 inode = VFS_I(ip);
Christoph Hellwig979ebab2008-03-06 13:46:05 +1100207
Eric Paris2a7dba32011-02-01 11:05:39 -0500208 error = xfs_init_security(inode, dir, &dentry->d_name);
Christoph Hellwigdb0bb7b2008-03-06 13:44:35 +1100209 if (unlikely(error))
210 goto out_cleanup_inode;
211
212 if (default_acl) {
Christoph Hellwigef14f0c2009-06-10 17:07:47 +0200213 error = -xfs_inherit_acl(inode, default_acl);
Al Viro826cae22011-07-23 03:10:32 -0400214 default_acl = NULL;
Christoph Hellwigdb0bb7b2008-03-06 13:44:35 +1100215 if (unlikely(error))
216 goto out_cleanup_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700217 }
218
Linus Torvalds1da177e2005-04-16 15:20:36 -0700219
Christoph Hellwigdb0bb7b2008-03-06 13:44:35 +1100220 d_instantiate(dentry, inode);
Christoph Hellwigdb0bb7b2008-03-06 13:44:35 +1100221 return -error;
222
223 out_cleanup_inode:
Christoph Hellwig8f112e32008-06-23 13:25:17 +1000224 xfs_cleanup_inode(dir, inode, dentry);
Christoph Hellwigdb0bb7b2008-03-06 13:44:35 +1100225 out_free_acl:
Christoph Hellwigef14f0c2009-06-10 17:07:47 +0200226 posix_acl_release(default_acl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700227 return -error;
228}
229
230STATIC int
Nathan Scott416c6d52006-03-14 14:00:51 +1100231xfs_vn_create(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700232 struct inode *dir,
233 struct dentry *dentry,
Al Viro4acdaf22011-07-26 01:42:34 -0400234 umode_t mode,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700235 struct nameidata *nd)
236{
Nathan Scott416c6d52006-03-14 14:00:51 +1100237 return xfs_vn_mknod(dir, dentry, mode, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238}
239
240STATIC int
Nathan Scott416c6d52006-03-14 14:00:51 +1100241xfs_vn_mkdir(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700242 struct inode *dir,
243 struct dentry *dentry,
Al Viro18bb1db2011-07-26 01:41:39 -0400244 umode_t mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700245{
Nathan Scott416c6d52006-03-14 14:00:51 +1100246 return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247}
248
249STATIC struct dentry *
Nathan Scott416c6d52006-03-14 14:00:51 +1100250xfs_vn_lookup(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 struct inode *dir,
252 struct dentry *dentry,
253 struct nameidata *nd)
254{
Christoph Hellwigef1f5e72008-03-06 13:46:25 +1100255 struct xfs_inode *cip;
Barry Naujok556b8b12008-04-10 12:22:07 +1000256 struct xfs_name name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257 int error;
258
259 if (dentry->d_name.len >= MAXNAMELEN)
260 return ERR_PTR(-ENAMETOOLONG);
261
Barry Naujok556b8b12008-04-10 12:22:07 +1000262 xfs_dentry_to_name(&name, dentry);
Barry Naujok384f3ce2008-05-21 16:58:22 +1000263 error = xfs_lookup(XFS_I(dir), &name, &cip, NULL);
Nathan Scott67fcaa72006-06-09 17:00:52 +1000264 if (unlikely(error)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700265 if (unlikely(error != ENOENT))
266 return ERR_PTR(-error);
267 d_add(dentry, NULL);
268 return NULL;
269 }
270
David Chinner01651642008-08-13 15:45:15 +1000271 return d_splice_alias(VFS_I(cip), dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272}
273
Barry Naujok384f3ce2008-05-21 16:58:22 +1000274STATIC struct dentry *
275xfs_vn_ci_lookup(
276 struct inode *dir,
277 struct dentry *dentry,
278 struct nameidata *nd)
279{
280 struct xfs_inode *ip;
281 struct xfs_name xname;
282 struct xfs_name ci_name;
283 struct qstr dname;
284 int error;
285
286 if (dentry->d_name.len >= MAXNAMELEN)
287 return ERR_PTR(-ENAMETOOLONG);
288
289 xfs_dentry_to_name(&xname, dentry);
290 error = xfs_lookup(XFS_I(dir), &xname, &ip, &ci_name);
291 if (unlikely(error)) {
292 if (unlikely(error != ENOENT))
293 return ERR_PTR(-error);
Barry Naujok866d5dc2008-05-22 17:21:40 +1000294 /*
295 * call d_add(dentry, NULL) here when d_drop_negative_children
296 * is called in xfs_vn_mknod (ie. allow negative dentries
297 * with CI filesystems).
298 */
Barry Naujok384f3ce2008-05-21 16:58:22 +1000299 return NULL;
300 }
301
302 /* if exact match, just splice and exit */
303 if (!ci_name.name)
David Chinner01651642008-08-13 15:45:15 +1000304 return d_splice_alias(VFS_I(ip), dentry);
Barry Naujok384f3ce2008-05-21 16:58:22 +1000305
306 /* else case-insensitive match... */
307 dname.name = ci_name.name;
308 dname.len = ci_name.len;
Christoph Hellwige45b5902008-08-07 23:49:07 +0200309 dentry = d_add_ci(dentry, VFS_I(ip), &dname);
Barry Naujok384f3ce2008-05-21 16:58:22 +1000310 kmem_free(ci_name.name);
311 return dentry;
312}
313
Linus Torvalds1da177e2005-04-16 15:20:36 -0700314STATIC int
Nathan Scott416c6d52006-03-14 14:00:51 +1100315xfs_vn_link(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316 struct dentry *old_dentry,
317 struct inode *dir,
318 struct dentry *dentry)
319{
Christoph Hellwigd9424b32008-12-03 12:20:27 +0100320 struct inode *inode = old_dentry->d_inode;
Barry Naujok556b8b12008-04-10 12:22:07 +1000321 struct xfs_name name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322 int error;
323
Barry Naujok556b8b12008-04-10 12:22:07 +1000324 xfs_dentry_to_name(&name, dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700325
Barry Naujok556b8b12008-04-10 12:22:07 +1000326 error = xfs_link(XFS_I(dir), XFS_I(inode), &name);
Christoph Hellwigd9424b32008-12-03 12:20:27 +0100327 if (unlikely(error))
Christoph Hellwiga3da7892008-03-06 13:46:12 +1100328 return -error;
Christoph Hellwiga3da7892008-03-06 13:46:12 +1100329
Al Viro7de9c6ee2010-10-23 11:11:40 -0400330 ihold(inode);
Christoph Hellwiga3da7892008-03-06 13:46:12 +1100331 d_instantiate(dentry, inode);
332 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333}
334
335STATIC int
Nathan Scott416c6d52006-03-14 14:00:51 +1100336xfs_vn_unlink(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700337 struct inode *dir,
338 struct dentry *dentry)
339{
Barry Naujok556b8b12008-04-10 12:22:07 +1000340 struct xfs_name name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341 int error;
342
Barry Naujok556b8b12008-04-10 12:22:07 +1000343 xfs_dentry_to_name(&name, dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344
Christoph Hellwige5700702008-06-23 13:25:25 +1000345 error = -xfs_remove(XFS_I(dir), &name, XFS_I(dentry->d_inode));
346 if (error)
347 return error;
348
349 /*
350 * With unlink, the VFS makes the dentry "negative": no inode,
351 * but still hashed. This is incompatible with case-insensitive
352 * mode, so invalidate (unhash) the dentry in CI-mode.
353 */
354 if (xfs_sb_version_hasasciici(&XFS_M(dir->i_sb)->m_sb))
355 d_invalidate(dentry);
356 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700357}
358
359STATIC int
Nathan Scott416c6d52006-03-14 14:00:51 +1100360xfs_vn_symlink(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361 struct inode *dir,
362 struct dentry *dentry,
363 const char *symname)
364{
Christoph Hellwig3937be52008-03-06 13:46:19 +1100365 struct inode *inode;
366 struct xfs_inode *cip = NULL;
Barry Naujok556b8b12008-04-10 12:22:07 +1000367 struct xfs_name name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 int error;
Al Viro576b1d62011-07-26 02:50:15 -0400369 umode_t mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370
Christoph Hellwig3e5daf02007-10-11 18:09:12 +1000371 mode = S_IFLNK |
Al Viroce3b0f82009-03-29 19:08:22 -0400372 (irix_symlink_mode ? 0777 & ~current_umask() : S_IRWXUGO);
Barry Naujok556b8b12008-04-10 12:22:07 +1000373 xfs_dentry_to_name(&name, dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700374
Christoph Hellwig6c77b0e2010-10-06 18:41:17 +0000375 error = xfs_symlink(XFS_I(dir), &name, symname, mode, &cip);
Christoph Hellwig3937be52008-03-06 13:46:19 +1100376 if (unlikely(error))
377 goto out;
378
David Chinner01651642008-08-13 15:45:15 +1000379 inode = VFS_I(cip);
Christoph Hellwig3937be52008-03-06 13:46:19 +1100380
Eric Paris2a7dba32011-02-01 11:05:39 -0500381 error = xfs_init_security(inode, dir, &dentry->d_name);
Christoph Hellwig3937be52008-03-06 13:46:19 +1100382 if (unlikely(error))
383 goto out_cleanup_inode;
384
385 d_instantiate(dentry, inode);
Christoph Hellwig3937be52008-03-06 13:46:19 +1100386 return 0;
387
388 out_cleanup_inode:
Christoph Hellwig8f112e32008-06-23 13:25:17 +1000389 xfs_cleanup_inode(dir, inode, dentry);
Christoph Hellwig3937be52008-03-06 13:46:19 +1100390 out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391 return -error;
392}
393
394STATIC int
Nathan Scott416c6d52006-03-14 14:00:51 +1100395xfs_vn_rename(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700396 struct inode *odir,
397 struct dentry *odentry,
398 struct inode *ndir,
399 struct dentry *ndentry)
400{
401 struct inode *new_inode = ndentry->d_inode;
Barry Naujok556b8b12008-04-10 12:22:07 +1000402 struct xfs_name oname;
403 struct xfs_name nname;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700404
Barry Naujok556b8b12008-04-10 12:22:07 +1000405 xfs_dentry_to_name(&oname, odentry);
406 xfs_dentry_to_name(&nname, ndentry);
407
Christoph Hellwige5700702008-06-23 13:25:25 +1000408 return -xfs_rename(XFS_I(odir), &oname, XFS_I(odentry->d_inode),
Christoph Hellwigcfa853e2008-04-22 17:34:06 +1000409 XFS_I(ndir), &nname, new_inode ?
410 XFS_I(new_inode) : NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411}
412
413/*
414 * careful here - this function can get called recursively, so
415 * we need to be very careful about how much stack we use.
416 * uio is kmalloced for this reason...
417 */
Al Viro008b1502005-08-20 00:17:39 +0100418STATIC void *
Nathan Scott416c6d52006-03-14 14:00:51 +1100419xfs_vn_follow_link(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420 struct dentry *dentry,
421 struct nameidata *nd)
422{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700423 char *link;
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000424 int error = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700425
Panagiotis Issarisf52720c2006-09-27 01:49:39 -0700426 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000427 if (!link)
428 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000430 error = -xfs_readlink(XFS_I(dentry->d_inode), link);
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000431 if (unlikely(error))
432 goto out_kfree;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700433
434 nd_set_link(nd, link);
Al Viro008b1502005-08-20 00:17:39 +0100435 return NULL;
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000436
437 out_kfree:
438 kfree(link);
439 out_err:
440 nd_set_link(nd, ERR_PTR(error));
441 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700442}
443
Nathan Scottcde410a2005-09-05 11:47:01 +1000444STATIC void
Nathan Scott416c6d52006-03-14 14:00:51 +1100445xfs_vn_put_link(
Nathan Scottcde410a2005-09-05 11:47:01 +1000446 struct dentry *dentry,
447 struct nameidata *nd,
448 void *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700449{
Nathan Scottcde410a2005-09-05 11:47:01 +1000450 char *s = nd_get_link(nd);
451
Linus Torvalds1da177e2005-04-16 15:20:36 -0700452 if (!IS_ERR(s))
453 kfree(s);
454}
455
Christoph Hellwig45767582008-02-05 12:13:24 +1100456STATIC int
Nathan Scott416c6d52006-03-14 14:00:51 +1100457xfs_vn_getattr(
Christoph Hellwigc43f4082007-10-11 17:46:39 +1000458 struct vfsmount *mnt,
459 struct dentry *dentry,
460 struct kstat *stat)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700461{
Christoph Hellwigc43f4082007-10-11 17:46:39 +1000462 struct inode *inode = dentry->d_inode;
463 struct xfs_inode *ip = XFS_I(inode);
464 struct xfs_mount *mp = ip->i_mount;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465
Christoph Hellwigcca28fb2010-06-24 11:57:09 +1000466 trace_xfs_getattr(ip);
Christoph Hellwigc43f4082007-10-11 17:46:39 +1000467
468 if (XFS_FORCED_SHUTDOWN(mp))
Mitsuo Hayasakaed322012011-09-17 13:38:38 +0000469 return -XFS_ERROR(EIO);
Christoph Hellwigc43f4082007-10-11 17:46:39 +1000470
471 stat->size = XFS_ISIZE(ip);
472 stat->dev = inode->i_sb->s_dev;
473 stat->mode = ip->i_d.di_mode;
474 stat->nlink = ip->i_d.di_nlink;
475 stat->uid = ip->i_d.di_uid;
476 stat->gid = ip->i_d.di_gid;
477 stat->ino = ip->i_ino;
Christoph Hellwigc43f4082007-10-11 17:46:39 +1000478 stat->atime = inode->i_atime;
Christoph Hellwigf9581b12009-10-06 20:29:26 +0000479 stat->mtime = inode->i_mtime;
480 stat->ctime = inode->i_ctime;
Christoph Hellwigc43f4082007-10-11 17:46:39 +1000481 stat->blocks =
482 XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks);
483
484
485 switch (inode->i_mode & S_IFMT) {
486 case S_IFBLK:
487 case S_IFCHR:
488 stat->blksize = BLKDEV_IOSIZE;
489 stat->rdev = MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
490 sysv_minor(ip->i_df.if_u2.if_rdev));
491 break;
492 default:
Eric Sandeen71ddabb2007-11-23 16:29:42 +1100493 if (XFS_IS_REALTIME_INODE(ip)) {
Christoph Hellwigc43f4082007-10-11 17:46:39 +1000494 /*
495 * If the file blocks are being allocated from a
496 * realtime volume, then return the inode's realtime
497 * extent size or the realtime volume's extent size.
498 */
499 stat->blksize =
500 xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog;
501 } else
502 stat->blksize = xfs_preferred_iosize(mp);
503 stat->rdev = 0;
504 break;
Nathan Scott69e23b92006-09-28 11:01:22 +1000505 }
Christoph Hellwigc43f4082007-10-11 17:46:39 +1000506
507 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700508}
509
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200510int
511xfs_setattr_nonsize(
512 struct xfs_inode *ip,
513 struct iattr *iattr,
514 int flags)
515{
516 xfs_mount_t *mp = ip->i_mount;
517 struct inode *inode = VFS_I(ip);
518 int mask = iattr->ia_valid;
519 xfs_trans_t *tp;
520 int error;
521 uid_t uid = 0, iuid = 0;
522 gid_t gid = 0, igid = 0;
523 struct xfs_dquot *udqp = NULL, *gdqp = NULL;
524 struct xfs_dquot *olddquot1 = NULL, *olddquot2 = NULL;
525
526 trace_xfs_setattr(ip);
527
528 if (mp->m_flags & XFS_MOUNT_RDONLY)
529 return XFS_ERROR(EROFS);
530
531 if (XFS_FORCED_SHUTDOWN(mp))
532 return XFS_ERROR(EIO);
533
534 error = -inode_change_ok(inode, iattr);
535 if (error)
536 return XFS_ERROR(error);
537
538 ASSERT((mask & ATTR_SIZE) == 0);
539
540 /*
541 * If disk quotas is on, we make sure that the dquots do exist on disk,
542 * before we start any other transactions. Trying to do this later
543 * is messy. We don't care to take a readlock to look at the ids
544 * in inode here, because we can't hold it across the trans_reserve.
545 * If the IDs do change before we take the ilock, we're covered
546 * because the i_*dquot fields will get updated anyway.
547 */
548 if (XFS_IS_QUOTA_ON(mp) && (mask & (ATTR_UID|ATTR_GID))) {
549 uint qflags = 0;
550
551 if ((mask & ATTR_UID) && XFS_IS_UQUOTA_ON(mp)) {
552 uid = iattr->ia_uid;
553 qflags |= XFS_QMOPT_UQUOTA;
554 } else {
555 uid = ip->i_d.di_uid;
556 }
557 if ((mask & ATTR_GID) && XFS_IS_GQUOTA_ON(mp)) {
558 gid = iattr->ia_gid;
559 qflags |= XFS_QMOPT_GQUOTA;
560 } else {
561 gid = ip->i_d.di_gid;
562 }
563
564 /*
565 * We take a reference when we initialize udqp and gdqp,
566 * so it is important that we never blindly double trip on
567 * the same variable. See xfs_create() for an example.
568 */
569 ASSERT(udqp == NULL);
570 ASSERT(gdqp == NULL);
571 error = xfs_qm_vop_dqalloc(ip, uid, gid, xfs_get_projid(ip),
572 qflags, &udqp, &gdqp);
573 if (error)
574 return error;
575 }
576
577 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
578 error = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0);
579 if (error)
580 goto out_dqrele;
581
582 xfs_ilock(ip, XFS_ILOCK_EXCL);
583
584 /*
585 * Change file ownership. Must be the owner or privileged.
586 */
587 if (mask & (ATTR_UID|ATTR_GID)) {
588 /*
589 * These IDs could have changed since we last looked at them.
590 * But, we're assured that if the ownership did change
591 * while we didn't have the inode locked, inode's dquot(s)
592 * would have changed also.
593 */
594 iuid = ip->i_d.di_uid;
595 igid = ip->i_d.di_gid;
596 gid = (mask & ATTR_GID) ? iattr->ia_gid : igid;
597 uid = (mask & ATTR_UID) ? iattr->ia_uid : iuid;
598
599 /*
600 * Do a quota reservation only if uid/gid is actually
601 * going to change.
602 */
603 if (XFS_IS_QUOTA_RUNNING(mp) &&
604 ((XFS_IS_UQUOTA_ON(mp) && iuid != uid) ||
605 (XFS_IS_GQUOTA_ON(mp) && igid != gid))) {
606 ASSERT(tp);
607 error = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
608 capable(CAP_FOWNER) ?
609 XFS_QMOPT_FORCE_RES : 0);
610 if (error) /* out of quota */
611 goto out_trans_cancel;
612 }
613 }
614
Christoph Hellwigddc34152011-09-19 15:00:54 +0000615 xfs_trans_ijoin(tp, ip, 0);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200616
617 /*
618 * Change file ownership. Must be the owner or privileged.
619 */
620 if (mask & (ATTR_UID|ATTR_GID)) {
621 /*
622 * CAP_FSETID overrides the following restrictions:
623 *
624 * The set-user-ID and set-group-ID bits of a file will be
625 * cleared upon successful return from chown()
626 */
627 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
628 !capable(CAP_FSETID))
629 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
630
631 /*
632 * Change the ownerships and register quota modifications
633 * in the transaction.
634 */
635 if (iuid != uid) {
636 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_UQUOTA_ON(mp)) {
637 ASSERT(mask & ATTR_UID);
638 ASSERT(udqp);
639 olddquot1 = xfs_qm_vop_chown(tp, ip,
640 &ip->i_udquot, udqp);
641 }
642 ip->i_d.di_uid = uid;
643 inode->i_uid = uid;
644 }
645 if (igid != gid) {
646 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_GQUOTA_ON(mp)) {
647 ASSERT(!XFS_IS_PQUOTA_ON(mp));
648 ASSERT(mask & ATTR_GID);
649 ASSERT(gdqp);
650 olddquot2 = xfs_qm_vop_chown(tp, ip,
651 &ip->i_gdquot, gdqp);
652 }
653 ip->i_d.di_gid = gid;
654 inode->i_gid = gid;
655 }
656 }
657
658 /*
659 * Change file access modes.
660 */
661 if (mask & ATTR_MODE) {
662 umode_t mode = iattr->ia_mode;
663
664 if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
665 mode &= ~S_ISGID;
666
667 ip->i_d.di_mode &= S_IFMT;
668 ip->i_d.di_mode |= mode & ~S_IFMT;
669
670 inode->i_mode &= S_IFMT;
671 inode->i_mode |= mode & ~S_IFMT;
672 }
673
674 /*
675 * Change file access or modified times.
676 */
677 if (mask & ATTR_ATIME) {
678 inode->i_atime = iattr->ia_atime;
679 ip->i_d.di_atime.t_sec = iattr->ia_atime.tv_sec;
680 ip->i_d.di_atime.t_nsec = iattr->ia_atime.tv_nsec;
681 ip->i_update_core = 1;
682 }
683 if (mask & ATTR_CTIME) {
684 inode->i_ctime = iattr->ia_ctime;
685 ip->i_d.di_ctime.t_sec = iattr->ia_ctime.tv_sec;
686 ip->i_d.di_ctime.t_nsec = iattr->ia_ctime.tv_nsec;
687 ip->i_update_core = 1;
688 }
689 if (mask & ATTR_MTIME) {
690 inode->i_mtime = iattr->ia_mtime;
691 ip->i_d.di_mtime.t_sec = iattr->ia_mtime.tv_sec;
692 ip->i_d.di_mtime.t_nsec = iattr->ia_mtime.tv_nsec;
693 ip->i_update_core = 1;
694 }
695
696 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
697
698 XFS_STATS_INC(xs_ig_attrchg);
699
700 if (mp->m_flags & XFS_MOUNT_WSYNC)
701 xfs_trans_set_sync(tp);
702 error = xfs_trans_commit(tp, 0);
703
704 xfs_iunlock(ip, XFS_ILOCK_EXCL);
705
706 /*
707 * Release any dquot(s) the inode had kept before chown.
708 */
709 xfs_qm_dqrele(olddquot1);
710 xfs_qm_dqrele(olddquot2);
711 xfs_qm_dqrele(udqp);
712 xfs_qm_dqrele(gdqp);
713
714 if (error)
715 return XFS_ERROR(error);
716
717 /*
718 * XXX(hch): Updating the ACL entries is not atomic vs the i_mode
719 * update. We could avoid this with linked transactions
720 * and passing down the transaction pointer all the way
721 * to attr_set. No previous user of the generic
722 * Posix ACL code seems to care about this issue either.
723 */
724 if ((mask & ATTR_MODE) && !(flags & XFS_ATTR_NOACL)) {
725 error = -xfs_acl_chmod(inode);
726 if (error)
727 return XFS_ERROR(error);
728 }
729
730 return 0;
731
732out_trans_cancel:
733 xfs_trans_cancel(tp, 0);
734 xfs_iunlock(ip, XFS_ILOCK_EXCL);
735out_dqrele:
736 xfs_qm_dqrele(udqp);
737 xfs_qm_dqrele(gdqp);
738 return error;
739}
740
741/*
742 * Truncate file. Must have write permission and not be a directory.
743 */
744int
745xfs_setattr_size(
746 struct xfs_inode *ip,
747 struct iattr *iattr,
748 int flags)
749{
750 struct xfs_mount *mp = ip->i_mount;
751 struct inode *inode = VFS_I(ip);
752 int mask = iattr->ia_valid;
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000753 xfs_off_t oldsize, newsize;
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200754 struct xfs_trans *tp;
755 int error;
756 uint lock_flags;
757 uint commit_flags = 0;
758
759 trace_xfs_setattr(ip);
760
761 if (mp->m_flags & XFS_MOUNT_RDONLY)
762 return XFS_ERROR(EROFS);
763
764 if (XFS_FORCED_SHUTDOWN(mp))
765 return XFS_ERROR(EIO);
766
767 error = -inode_change_ok(inode, iattr);
768 if (error)
769 return XFS_ERROR(error);
770
771 ASSERT(S_ISREG(ip->i_d.di_mode));
772 ASSERT((mask & (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_ATIME_SET|
773 ATTR_MTIME_SET|ATTR_KILL_SUID|ATTR_KILL_SGID|
774 ATTR_KILL_PRIV|ATTR_TIMES_SET)) == 0);
775
776 lock_flags = XFS_ILOCK_EXCL;
777 if (!(flags & XFS_ATTR_NOLOCK))
778 lock_flags |= XFS_IOLOCK_EXCL;
779 xfs_ilock(ip, lock_flags);
780
Christoph Hellwigce7ae1512011-12-18 20:00:11 +0000781 oldsize = inode->i_size;
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000782 newsize = iattr->ia_size;
783
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200784 /*
785 * Short circuit the truncate case for zero length files.
786 */
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000787 if (newsize == 0 && oldsize == 0 && ip->i_d.di_nextents == 0) {
Christoph Hellwig681b1202011-07-08 14:34:26 +0200788 if (!(mask & (ATTR_CTIME|ATTR_MTIME)))
789 goto out_unlock;
790
791 /*
792 * Use the regular setattr path to update the timestamps.
793 */
794 xfs_iunlock(ip, lock_flags);
795 iattr->ia_valid &= ~ATTR_SIZE;
796 return xfs_setattr_nonsize(ip, iattr, 0);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200797 }
798
799 /*
800 * Make sure that the dquots are attached to the inode.
801 */
802 error = xfs_qm_dqattach_locked(ip, 0);
803 if (error)
804 goto out_unlock;
805
806 /*
807 * Now we can make the changes. Before we join the inode to the
808 * transaction, take care of the part of the truncation that must be
809 * done without the inode lock. This needs to be done before joining
810 * the inode to the transaction, because the inode cannot be unlocked
811 * once it is a part of the transaction.
812 */
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000813 if (newsize > oldsize) {
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200814 /*
815 * Do the first part of growing a file: zero any data in the
816 * last block that is beyond the old EOF. We need to do this
817 * before the inode is joined to the transaction to modify
818 * i_size.
819 */
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000820 error = xfs_zero_eof(ip, newsize, oldsize);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200821 if (error)
822 goto out_unlock;
823 }
824 xfs_iunlock(ip, XFS_ILOCK_EXCL);
825 lock_flags &= ~XFS_ILOCK_EXCL;
826
827 /*
828 * We are going to log the inode size change in this transaction so
829 * any previous writes that are beyond the on disk EOF and the new
830 * EOF that have not been written out need to be written here. If we
831 * do not write the data out, we expose ourselves to the null files
832 * problem.
833 *
834 * Only flush from the on disk size to the smaller of the in memory
835 * file size or the new size as that's the range we really care about
836 * here and prevents waiting for other data not within the range we
837 * care about here.
838 */
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000839 if (oldsize != ip->i_d.di_size && newsize > ip->i_d.di_size) {
840 error = xfs_flush_pages(ip, ip->i_d.di_size, newsize, 0,
Christoph Hellwig2b3ffd72011-08-23 08:28:12 +0000841 FI_NONE);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200842 if (error)
843 goto out_unlock;
844 }
845
846 /*
Christoph Hellwig4a06fd22011-08-23 08:28:13 +0000847 * Wait for all direct I/O to complete.
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200848 */
Christoph Hellwig4a06fd22011-08-23 08:28:13 +0000849 inode_dio_wait(inode);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200850
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000851 error = -block_truncate_page(inode->i_mapping, newsize, xfs_get_blocks);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200852 if (error)
853 goto out_unlock;
854
855 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_SIZE);
856 error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0,
857 XFS_TRANS_PERM_LOG_RES,
858 XFS_ITRUNCATE_LOG_COUNT);
859 if (error)
860 goto out_trans_cancel;
861
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000862 truncate_setsize(inode, newsize);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200863
864 commit_flags = XFS_TRANS_RELEASE_LOG_RES;
865 lock_flags |= XFS_ILOCK_EXCL;
866
867 xfs_ilock(ip, XFS_ILOCK_EXCL);
868
Christoph Hellwigddc34152011-09-19 15:00:54 +0000869 xfs_trans_ijoin(tp, ip, 0);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200870
871 /*
872 * Only change the c/mtime if we are changing the size or we are
873 * explicitly asked to change it. This handles the semantic difference
874 * between truncate() and ftruncate() as implemented in the VFS.
875 *
876 * The regular truncate() case without ATTR_CTIME and ATTR_MTIME is a
877 * special case where we need to update the times despite not having
878 * these flags set. For all other operations the VFS set these flags
879 * explicitly if it wants a timestamp update.
880 */
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000881 if (newsize != oldsize && (!(mask & (ATTR_CTIME | ATTR_MTIME)))) {
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200882 iattr->ia_ctime = iattr->ia_mtime =
883 current_fs_time(inode->i_sb);
884 mask |= ATTR_CTIME | ATTR_MTIME;
885 }
886
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000887 /*
888 * The first thing we do is set the size to new_size permanently on
889 * disk. This way we don't have to worry about anyone ever being able
890 * to look at the data being freed even in the face of a crash.
891 * What we're getting around here is the case where we free a block, it
892 * is allocated to another file, it is written to, and then we crash.
893 * If the new data gets written to the file but the log buffers
894 * containing the free and reallocation don't, then we'd end up with
895 * garbage in the blocks being freed. As long as we make the new size
896 * permanent before actually freeing any blocks it doesn't matter if
897 * they get written to.
898 */
899 ip->i_d.di_size = newsize;
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000900 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
901
902 if (newsize <= oldsize) {
903 error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, newsize);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200904 if (error)
905 goto out_trans_abort;
906
907 /*
908 * Truncated "down", so we're removing references to old data
909 * here - if we delay flushing for a long time, we expose
910 * ourselves unduly to the notorious NULL files problem. So,
911 * we mark this inode and flush it when the file is closed,
912 * and do not wait the usual (long) time for writeout.
913 */
914 xfs_iflags_set(ip, XFS_ITRUNCATED);
915 }
916
917 if (mask & ATTR_CTIME) {
918 inode->i_ctime = iattr->ia_ctime;
919 ip->i_d.di_ctime.t_sec = iattr->ia_ctime.tv_sec;
920 ip->i_d.di_ctime.t_nsec = iattr->ia_ctime.tv_nsec;
921 ip->i_update_core = 1;
922 }
923 if (mask & ATTR_MTIME) {
924 inode->i_mtime = iattr->ia_mtime;
925 ip->i_d.di_mtime.t_sec = iattr->ia_mtime.tv_sec;
926 ip->i_d.di_mtime.t_nsec = iattr->ia_mtime.tv_nsec;
927 ip->i_update_core = 1;
928 }
929
930 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
931
932 XFS_STATS_INC(xs_ig_attrchg);
933
934 if (mp->m_flags & XFS_MOUNT_WSYNC)
935 xfs_trans_set_sync(tp);
936
937 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
938out_unlock:
939 if (lock_flags)
940 xfs_iunlock(ip, lock_flags);
941 return error;
942
943out_trans_abort:
944 commit_flags |= XFS_TRANS_ABORT;
945out_trans_cancel:
946 xfs_trans_cancel(tp, commit_flags);
947 goto out_unlock;
948}
949
Linus Torvalds1da177e2005-04-16 15:20:36 -0700950STATIC int
Nathan Scott416c6d52006-03-14 14:00:51 +1100951xfs_vn_setattr(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700952 struct dentry *dentry,
Christoph Hellwig0f285c82008-07-18 17:13:28 +1000953 struct iattr *iattr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700954{
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200955 if (iattr->ia_valid & ATTR_SIZE)
956 return -xfs_setattr_size(XFS_I(dentry->d_inode), iattr, 0);
957 return -xfs_setattr_nonsize(XFS_I(dentry->d_inode), iattr, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700958}
959
Eric Sandeenf35642e2008-11-28 14:23:35 +1100960#define XFS_FIEMAP_FLAGS (FIEMAP_FLAG_SYNC|FIEMAP_FLAG_XATTR)
961
962/*
963 * Call fiemap helper to fill in user data.
964 * Returns positive errors to xfs_getbmap.
965 */
966STATIC int
967xfs_fiemap_format(
968 void **arg,
969 struct getbmapx *bmv,
970 int *full)
971{
972 int error;
973 struct fiemap_extent_info *fieinfo = *arg;
974 u32 fiemap_flags = 0;
975 u64 logical, physical, length;
976
977 /* Do nothing for a hole */
978 if (bmv->bmv_block == -1LL)
979 return 0;
980
981 logical = BBTOB(bmv->bmv_offset);
982 physical = BBTOB(bmv->bmv_block);
983 length = BBTOB(bmv->bmv_length);
984
985 if (bmv->bmv_oflags & BMV_OF_PREALLOC)
986 fiemap_flags |= FIEMAP_EXTENT_UNWRITTEN;
987 else if (bmv->bmv_oflags & BMV_OF_DELALLOC) {
988 fiemap_flags |= FIEMAP_EXTENT_DELALLOC;
989 physical = 0; /* no block yet */
990 }
991 if (bmv->bmv_oflags & BMV_OF_LAST)
992 fiemap_flags |= FIEMAP_EXTENT_LAST;
993
994 error = fiemap_fill_next_extent(fieinfo, logical, physical,
995 length, fiemap_flags);
996 if (error > 0) {
997 error = 0;
998 *full = 1; /* user array now full */
999 }
1000
1001 return -error;
1002}
1003
1004STATIC int
1005xfs_vn_fiemap(
1006 struct inode *inode,
1007 struct fiemap_extent_info *fieinfo,
1008 u64 start,
1009 u64 length)
1010{
1011 xfs_inode_t *ip = XFS_I(inode);
1012 struct getbmapx bm;
1013 int error;
1014
1015 error = fiemap_check_flags(fieinfo, XFS_FIEMAP_FLAGS);
1016 if (error)
1017 return error;
1018
1019 /* Set up bmap header for xfs internal routine */
1020 bm.bmv_offset = BTOBB(start);
1021 /* Special case for whole file */
1022 if (length == FIEMAP_MAX_OFFSET)
1023 bm.bmv_length = -1LL;
1024 else
1025 bm.bmv_length = BTOBB(length);
1026
Eric Sandeen97db39a2009-07-26 21:52:01 -05001027 /* We add one because in getbmap world count includes the header */
Tao Ma2d1ff3c2010-04-29 15:13:56 +10001028 bm.bmv_count = !fieinfo->fi_extents_max ? MAXEXTNUM :
1029 fieinfo->fi_extents_max + 1;
1030 bm.bmv_count = min_t(__s32, bm.bmv_count,
1031 (PAGE_SIZE * 16 / sizeof(struct getbmapx)));
Tao Ma9af25462010-08-30 02:44:03 +00001032 bm.bmv_iflags = BMV_IF_PREALLOC | BMV_IF_NO_HOLES;
Eric Sandeenf35642e2008-11-28 14:23:35 +11001033 if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR)
1034 bm.bmv_iflags |= BMV_IF_ATTRFORK;
1035 if (!(fieinfo->fi_flags & FIEMAP_FLAG_SYNC))
1036 bm.bmv_iflags |= BMV_IF_DELALLOC;
1037
1038 error = xfs_getbmap(ip, &bm, xfs_fiemap_format, fieinfo);
1039 if (error)
1040 return -error;
1041
1042 return 0;
1043}
1044
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001045static const struct inode_operations xfs_inode_operations = {
Christoph Hellwig4e34e712011-07-23 17:37:31 +02001046 .get_acl = xfs_get_acl,
Nathan Scott416c6d52006-03-14 14:00:51 +11001047 .getattr = xfs_vn_getattr,
1048 .setattr = xfs_vn_setattr,
Lachlan McIlroy0ec58512008-06-23 13:23:01 +10001049 .setxattr = generic_setxattr,
1050 .getxattr = generic_getxattr,
1051 .removexattr = generic_removexattr,
Nathan Scott416c6d52006-03-14 14:00:51 +11001052 .listxattr = xfs_vn_listxattr,
Eric Sandeenf35642e2008-11-28 14:23:35 +11001053 .fiemap = xfs_vn_fiemap,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001054};
1055
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001056static const struct inode_operations xfs_dir_inode_operations = {
Nathan Scott416c6d52006-03-14 14:00:51 +11001057 .create = xfs_vn_create,
1058 .lookup = xfs_vn_lookup,
1059 .link = xfs_vn_link,
1060 .unlink = xfs_vn_unlink,
1061 .symlink = xfs_vn_symlink,
1062 .mkdir = xfs_vn_mkdir,
Christoph Hellwig8f112e32008-06-23 13:25:17 +10001063 /*
1064 * Yes, XFS uses the same method for rmdir and unlink.
1065 *
1066 * There are some subtile differences deeper in the code,
1067 * but we use S_ISDIR to check for those.
1068 */
1069 .rmdir = xfs_vn_unlink,
Nathan Scott416c6d52006-03-14 14:00:51 +11001070 .mknod = xfs_vn_mknod,
1071 .rename = xfs_vn_rename,
Christoph Hellwig4e34e712011-07-23 17:37:31 +02001072 .get_acl = xfs_get_acl,
Nathan Scott416c6d52006-03-14 14:00:51 +11001073 .getattr = xfs_vn_getattr,
1074 .setattr = xfs_vn_setattr,
Lachlan McIlroy0ec58512008-06-23 13:23:01 +10001075 .setxattr = generic_setxattr,
1076 .getxattr = generic_getxattr,
1077 .removexattr = generic_removexattr,
Nathan Scott416c6d52006-03-14 14:00:51 +11001078 .listxattr = xfs_vn_listxattr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001079};
1080
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001081static const struct inode_operations xfs_dir_ci_inode_operations = {
Barry Naujok384f3ce2008-05-21 16:58:22 +10001082 .create = xfs_vn_create,
1083 .lookup = xfs_vn_ci_lookup,
1084 .link = xfs_vn_link,
1085 .unlink = xfs_vn_unlink,
1086 .symlink = xfs_vn_symlink,
1087 .mkdir = xfs_vn_mkdir,
Christoph Hellwig8f112e32008-06-23 13:25:17 +10001088 /*
1089 * Yes, XFS uses the same method for rmdir and unlink.
1090 *
1091 * There are some subtile differences deeper in the code,
1092 * but we use S_ISDIR to check for those.
1093 */
1094 .rmdir = xfs_vn_unlink,
Barry Naujok384f3ce2008-05-21 16:58:22 +10001095 .mknod = xfs_vn_mknod,
1096 .rename = xfs_vn_rename,
Christoph Hellwig4e34e712011-07-23 17:37:31 +02001097 .get_acl = xfs_get_acl,
Barry Naujok384f3ce2008-05-21 16:58:22 +10001098 .getattr = xfs_vn_getattr,
1099 .setattr = xfs_vn_setattr,
Lachlan McIlroy0ec58512008-06-23 13:23:01 +10001100 .setxattr = generic_setxattr,
1101 .getxattr = generic_getxattr,
1102 .removexattr = generic_removexattr,
Barry Naujok384f3ce2008-05-21 16:58:22 +10001103 .listxattr = xfs_vn_listxattr,
Barry Naujok384f3ce2008-05-21 16:58:22 +10001104};
1105
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001106static const struct inode_operations xfs_symlink_inode_operations = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001107 .readlink = generic_readlink,
Nathan Scott416c6d52006-03-14 14:00:51 +11001108 .follow_link = xfs_vn_follow_link,
1109 .put_link = xfs_vn_put_link,
Christoph Hellwig4e34e712011-07-23 17:37:31 +02001110 .get_acl = xfs_get_acl,
Nathan Scott416c6d52006-03-14 14:00:51 +11001111 .getattr = xfs_vn_getattr,
1112 .setattr = xfs_vn_setattr,
Lachlan McIlroy0ec58512008-06-23 13:23:01 +10001113 .setxattr = generic_setxattr,
1114 .getxattr = generic_getxattr,
1115 .removexattr = generic_removexattr,
Nathan Scott416c6d52006-03-14 14:00:51 +11001116 .listxattr = xfs_vn_listxattr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001117};
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001118
1119STATIC void
1120xfs_diflags_to_iflags(
1121 struct inode *inode,
1122 struct xfs_inode *ip)
1123{
1124 if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE)
1125 inode->i_flags |= S_IMMUTABLE;
1126 else
1127 inode->i_flags &= ~S_IMMUTABLE;
1128 if (ip->i_d.di_flags & XFS_DIFLAG_APPEND)
1129 inode->i_flags |= S_APPEND;
1130 else
1131 inode->i_flags &= ~S_APPEND;
1132 if (ip->i_d.di_flags & XFS_DIFLAG_SYNC)
1133 inode->i_flags |= S_SYNC;
1134 else
1135 inode->i_flags &= ~S_SYNC;
1136 if (ip->i_d.di_flags & XFS_DIFLAG_NOATIME)
1137 inode->i_flags |= S_NOATIME;
1138 else
1139 inode->i_flags &= ~S_NOATIME;
1140}
1141
1142/*
1143 * Initialize the Linux inode, set up the operation vectors and
1144 * unlock the inode.
1145 *
1146 * When reading existing inodes from disk this is called directly
1147 * from xfs_iget, when creating a new inode it is called from
1148 * xfs_ialloc after setting up the inode.
David Chinnerbf904242008-10-30 17:36:14 +11001149 *
1150 * We are always called with an uninitialised linux inode here.
1151 * We need to initialise the necessary fields and take a reference
1152 * on it.
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001153 */
1154void
1155xfs_setup_inode(
1156 struct xfs_inode *ip)
1157{
David Chinnerbf904242008-10-30 17:36:14 +11001158 struct inode *inode = &ip->i_vnode;
1159
1160 inode->i_ino = ip->i_ino;
Christoph Hellwigeaff8072009-12-17 14:25:01 +01001161 inode->i_state = I_NEW;
Christoph Hellwig646ec462010-10-23 07:15:32 -04001162
1163 inode_sb_list_add(inode);
Christoph Hellwigc6f6cd02010-11-06 11:43:08 +00001164 /* make the inode look hashed for the writeback code */
1165 hlist_add_fake(&inode->i_hash);
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001166
1167 inode->i_mode = ip->i_d.di_mode;
Miklos Szeredibfe86842011-10-28 14:13:29 +02001168 set_nlink(inode, ip->i_d.di_nlink);
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001169 inode->i_uid = ip->i_d.di_uid;
1170 inode->i_gid = ip->i_d.di_gid;
1171
1172 switch (inode->i_mode & S_IFMT) {
1173 case S_IFBLK:
1174 case S_IFCHR:
1175 inode->i_rdev =
1176 MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
1177 sysv_minor(ip->i_df.if_u2.if_rdev));
1178 break;
1179 default:
1180 inode->i_rdev = 0;
1181 break;
1182 }
1183
1184 inode->i_generation = ip->i_d.di_gen;
1185 i_size_write(inode, ip->i_d.di_size);
1186 inode->i_atime.tv_sec = ip->i_d.di_atime.t_sec;
1187 inode->i_atime.tv_nsec = ip->i_d.di_atime.t_nsec;
1188 inode->i_mtime.tv_sec = ip->i_d.di_mtime.t_sec;
1189 inode->i_mtime.tv_nsec = ip->i_d.di_mtime.t_nsec;
1190 inode->i_ctime.tv_sec = ip->i_d.di_ctime.t_sec;
1191 inode->i_ctime.tv_nsec = ip->i_d.di_ctime.t_nsec;
1192 xfs_diflags_to_iflags(inode, ip);
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001193
1194 switch (inode->i_mode & S_IFMT) {
1195 case S_IFREG:
1196 inode->i_op = &xfs_inode_operations;
1197 inode->i_fop = &xfs_file_operations;
1198 inode->i_mapping->a_ops = &xfs_address_space_operations;
1199 break;
1200 case S_IFDIR:
1201 if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb))
1202 inode->i_op = &xfs_dir_ci_inode_operations;
1203 else
1204 inode->i_op = &xfs_dir_inode_operations;
1205 inode->i_fop = &xfs_dir_file_operations;
1206 break;
1207 case S_IFLNK:
1208 inode->i_op = &xfs_symlink_inode_operations;
1209 if (!(ip->i_df.if_flags & XFS_IFINLINE))
1210 inode->i_mapping->a_ops = &xfs_address_space_operations;
1211 break;
1212 default:
1213 inode->i_op = &xfs_inode_operations;
1214 init_special_inode(inode, inode->i_mode, inode->i_rdev);
1215 break;
1216 }
1217
Christoph Hellwig510792e2011-07-26 15:07:29 +00001218 /*
1219 * If there is no attribute fork no ACL can exist on this inode,
1220 * and it can't have any file capabilities attached to it either.
1221 */
1222 if (!XFS_IFORK_Q(ip)) {
1223 inode_has_no_xattr(inode);
Christoph Hellwig6311b102011-07-23 17:36:50 +02001224 cache_no_acl(inode);
Christoph Hellwig510792e2011-07-26 15:07:29 +00001225 }
Christoph Hellwig6311b102011-07-23 17:36:50 +02001226
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001227 xfs_iflags_clear(ip, XFS_INEW);
1228 barrier();
1229
1230 unlock_new_inode(inode);
1231}