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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"
Dave Chinner70a9883c2013-10-23 10:36:05 +110020#include "xfs_shared.h"
Dave Chinner239880e2013-10-23 10:50:10 +110021#include "xfs_format.h"
22#include "xfs_log_format.h"
23#include "xfs_trans_resv.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include "xfs_sb.h"
25#include "xfs_ag.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#include "xfs_mount.h"
Dave Chinner57062782013-10-15 09:17:51 +110027#include "xfs_da_format.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include "xfs_inode.h"
29#include "xfs_bmap.h"
Dave Chinner68988112013-08-12 20:49:42 +100030#include "xfs_bmap_util.h"
Dave Chinner239880e2013-10-23 10:50:10 +110031#include "xfs_acl.h"
Dave Chinner239880e2013-10-23 10:50:10 +110032#include "xfs_quota.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#include "xfs_error.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#include "xfs_attr.h"
Dave Chinner239880e2013-10-23 10:50:10 +110035#include "xfs_trans.h"
Christoph Hellwig0b1b2132009-12-14 23:14:59 +000036#include "xfs_trace.h"
Brian Foster27b52862012-11-06 09:50:38 -050037#include "xfs_icache.h"
Dave Chinnerc24b5df2013-08-12 20:49:45 +100038#include "xfs_symlink.h"
Dave Chinner0cb97762013-08-12 20:50:09 +100039#include "xfs_da_btree.h"
Dave Chinner0cb97762013-08-12 20:50:09 +100040#include "xfs_dir2_priv.h"
Dave Chinnera4fbe6a2013-10-23 10:51:50 +110041#include "xfs_dinode.h"
Zhi Yong Wu99b64362013-12-18 08:22:40 +080042#include "xfs_trans_space.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070043
Randy Dunlap16f7e0f2006-01-11 12:17:46 -080044#include <linux/capability.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070045#include <linux/xattr.h>
46#include <linux/namei.h>
Christoph Hellwigef14f0c2009-06-10 17:07:47 +020047#include <linux/posix_acl.h>
Nathan Scott446ada42006-01-11 15:35:44 +110048#include <linux/security.h>
Eric Sandeenf35642e2008-11-28 14:23:35 +110049#include <linux/fiemap.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090050#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070051
Dave Chinner93a86142014-02-27 16:51:39 +110052/*
53 * Directories have different lock order w.r.t. mmap_sem compared to regular
54 * files. This is due to readdir potentially triggering page faults on a user
55 * buffer inside filldir(), and this happens with the ilock on the directory
56 * held. For regular files, the lock order is the other way around - the
57 * mmap_sem is taken during the page fault, and then we lock the ilock to do
58 * block mapping. Hence we need a different class for the directory ilock so
59 * that lockdep can tell them apart.
60 */
61static struct lock_class_key xfs_nondir_ilock_class;
62static struct lock_class_key xfs_dir_ilock_class;
63
Dave Chinner8d2a5e62012-03-07 04:50:19 +000064static int
65xfs_initxattrs(
66 struct inode *inode,
67 const struct xattr *xattr_array,
68 void *fs_info)
Mimi Zohar9d8f13b2011-06-06 15:29:25 -040069{
Dave Chinner8d2a5e62012-03-07 04:50:19 +000070 const struct xattr *xattr;
71 struct xfs_inode *ip = XFS_I(inode);
72 int error = 0;
Mimi Zohar9d8f13b2011-06-06 15:29:25 -040073
74 for (xattr = xattr_array; xattr->name != NULL; xattr++) {
75 error = xfs_attr_set(ip, xattr->name, xattr->value,
76 xattr->value_len, ATTR_SECURE);
77 if (error < 0)
78 break;
79 }
80 return error;
81}
82
David Chinner5d51eff2007-11-23 16:29:18 +110083/*
Nathan Scott446ada42006-01-11 15:35:44 +110084 * Hook in SELinux. This is not quite correct yet, what we really need
85 * here (as we do for default ACLs) is a mechanism by which creation of
86 * these attrs can be journalled at inode creation time (along with the
87 * inode, of course, such that log replay can't cause these to be lost).
88 */
Mimi Zohar9d8f13b2011-06-06 15:29:25 -040089
Nathan Scott446ada42006-01-11 15:35:44 +110090STATIC int
Nathan Scott416c6d52006-03-14 14:00:51 +110091xfs_init_security(
Christoph Hellwigaf048192008-03-06 13:46:43 +110092 struct inode *inode,
Eric Paris2a7dba32011-02-01 11:05:39 -050093 struct inode *dir,
94 const struct qstr *qstr)
Nathan Scott446ada42006-01-11 15:35:44 +110095{
Mimi Zohar9d8f13b2011-06-06 15:29:25 -040096 return security_inode_init_security(inode, dir, qstr,
97 &xfs_initxattrs, NULL);
Nathan Scott446ada42006-01-11 15:35:44 +110098}
99
Barry Naujok556b8b12008-04-10 12:22:07 +1000100static void
101xfs_dentry_to_name(
102 struct xfs_name *namep,
Dave Chinner0cb97762013-08-12 20:50:09 +1000103 struct dentry *dentry,
104 int mode)
Barry Naujok556b8b12008-04-10 12:22:07 +1000105{
106 namep->name = dentry->d_name.name;
107 namep->len = dentry->d_name.len;
Dave Chinner0cb97762013-08-12 20:50:09 +1000108 namep->type = xfs_mode_to_ftype[(mode & S_IFMT) >> S_SHIFT];
Barry Naujok556b8b12008-04-10 12:22:07 +1000109}
110
David Chinner7989cb82007-02-10 18:34:56 +1100111STATIC void
Nathan Scott416c6d52006-03-14 14:00:51 +1100112xfs_cleanup_inode(
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000113 struct inode *dir,
Christoph Hellwigaf048192008-03-06 13:46:43 +1100114 struct inode *inode,
Christoph Hellwig8f112e32008-06-23 13:25:17 +1000115 struct dentry *dentry)
Yingping Lu3a69c7d2006-02-01 12:14:34 +1100116{
Barry Naujok556b8b12008-04-10 12:22:07 +1000117 struct xfs_name teardown;
Yingping Lu3a69c7d2006-02-01 12:14:34 +1100118
119 /* Oh, the horror.
Nathan Scott220b5282006-03-14 13:33:36 +1100120 * If we can't add the ACL or we fail in
Nathan Scott416c6d52006-03-14 14:00:51 +1100121 * xfs_init_security we must back out.
Yingping Lu3a69c7d2006-02-01 12:14:34 +1100122 * ENOSPC can hit here, among other things.
123 */
Dave Chinner0cb97762013-08-12 20:50:09 +1000124 xfs_dentry_to_name(&teardown, dentry, 0);
Yingping Lu3a69c7d2006-02-01 12:14:34 +1100125
Christoph Hellwig8f112e32008-06-23 13:25:17 +1000126 xfs_remove(XFS_I(dir), &teardown, XFS_I(inode));
Yingping Lu3a69c7d2006-02-01 12:14:34 +1100127}
128
Linus Torvalds1da177e2005-04-16 15:20:36 -0700129STATIC int
Brian Fosterd540e432014-05-06 07:34:28 +1000130xfs_generic_create(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700131 struct inode *dir,
132 struct dentry *dentry,
Al Viro1a67aaf2011-07-26 01:52:52 -0400133 umode_t mode,
Brian Fosterd540e432014-05-06 07:34:28 +1000134 dev_t rdev,
135 bool tmpfile) /* unnamed file */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700136{
Christoph Hellwigdb0bb7b2008-03-06 13:44:35 +1100137 struct inode *inode;
Christoph Hellwig979ebab2008-03-06 13:46:05 +1100138 struct xfs_inode *ip = NULL;
Christoph Hellwig2401dc22013-12-20 05:16:50 -0800139 struct posix_acl *default_acl, *acl;
Barry Naujok556b8b12008-04-10 12:22:07 +1000140 struct xfs_name name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141 int error;
142
143 /*
144 * Irix uses Missed'em'V split, but doesn't want to see
145 * the upper 5 bits of (14bit) major.
146 */
Christoph Hellwig517b5e82009-02-09 08:38:02 +0100147 if (S_ISCHR(mode) || S_ISBLK(mode)) {
148 if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff))
149 return -EINVAL;
150 rdev = sysv_encode_dev(rdev);
151 } else {
152 rdev = 0;
153 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700154
Christoph Hellwig2401dc22013-12-20 05:16:50 -0800155 error = posix_acl_create(dir, &mode, &default_acl, &acl);
156 if (error)
157 return error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700158
Brian Fosterd540e432014-05-06 07:34:28 +1000159 if (!tmpfile) {
160 xfs_dentry_to_name(&name, dentry, mode);
161 error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip);
162 } else {
163 error = xfs_create_tmpfile(XFS_I(dir), dentry, mode, &ip);
164 }
Christoph Hellwigdb0bb7b2008-03-06 13:44:35 +1100165 if (unlikely(error))
166 goto out_free_acl;
Nathan Scott446ada42006-01-11 15:35:44 +1100167
David Chinner01651642008-08-13 15:45:15 +1000168 inode = VFS_I(ip);
Christoph Hellwig979ebab2008-03-06 13:46:05 +1100169
Eric Paris2a7dba32011-02-01 11:05:39 -0500170 error = xfs_init_security(inode, dir, &dentry->d_name);
Christoph Hellwigdb0bb7b2008-03-06 13:44:35 +1100171 if (unlikely(error))
172 goto out_cleanup_inode;
173
Christoph Hellwig2401dc22013-12-20 05:16:50 -0800174#ifdef CONFIG_XFS_POSIX_ACL
Christoph Hellwigdb0bb7b2008-03-06 13:44:35 +1100175 if (default_acl) {
Christoph Hellwig2401dc22013-12-20 05:16:50 -0800176 error = xfs_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
177 if (error)
Christoph Hellwigdb0bb7b2008-03-06 13:44:35 +1100178 goto out_cleanup_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700179 }
Christoph Hellwig2401dc22013-12-20 05:16:50 -0800180 if (acl) {
181 error = xfs_set_acl(inode, acl, ACL_TYPE_ACCESS);
182 if (error)
183 goto out_cleanup_inode;
184 }
185#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186
Brian Fosterd540e432014-05-06 07:34:28 +1000187 if (tmpfile)
188 d_tmpfile(dentry, inode);
189 else
190 d_instantiate(dentry, inode);
191
Christoph Hellwig2401dc22013-12-20 05:16:50 -0800192 out_free_acl:
193 if (default_acl)
194 posix_acl_release(default_acl);
195 if (acl)
196 posix_acl_release(acl);
Christoph Hellwigdb0bb7b2008-03-06 13:44:35 +1100197 return -error;
198
199 out_cleanup_inode:
Brian Fosterd540e432014-05-06 07:34:28 +1000200 if (!tmpfile)
201 xfs_cleanup_inode(dir, inode, dentry);
202 iput(inode);
Christoph Hellwig2401dc22013-12-20 05:16:50 -0800203 goto out_free_acl;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700204}
205
206STATIC int
Brian Fosterd540e432014-05-06 07:34:28 +1000207xfs_vn_mknod(
208 struct inode *dir,
209 struct dentry *dentry,
210 umode_t mode,
211 dev_t rdev)
212{
213 return xfs_generic_create(dir, dentry, mode, rdev, false);
214}
215
216STATIC int
Nathan Scott416c6d52006-03-14 14:00:51 +1100217xfs_vn_create(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700218 struct inode *dir,
219 struct dentry *dentry,
Al Viro4acdaf22011-07-26 01:42:34 -0400220 umode_t mode,
Al Viroebfc3b42012-06-10 18:05:36 -0400221 bool flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222{
Nathan Scott416c6d52006-03-14 14:00:51 +1100223 return xfs_vn_mknod(dir, dentry, mode, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700224}
225
226STATIC int
Nathan Scott416c6d52006-03-14 14:00:51 +1100227xfs_vn_mkdir(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228 struct inode *dir,
229 struct dentry *dentry,
Al Viro18bb1db2011-07-26 01:41:39 -0400230 umode_t mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231{
Nathan Scott416c6d52006-03-14 14:00:51 +1100232 return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700233}
234
235STATIC struct dentry *
Nathan Scott416c6d52006-03-14 14:00:51 +1100236xfs_vn_lookup(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700237 struct inode *dir,
238 struct dentry *dentry,
Al Viro00cd8dd2012-06-10 17:13:09 -0400239 unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700240{
Christoph Hellwigef1f5e72008-03-06 13:46:25 +1100241 struct xfs_inode *cip;
Barry Naujok556b8b12008-04-10 12:22:07 +1000242 struct xfs_name name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 int error;
244
245 if (dentry->d_name.len >= MAXNAMELEN)
246 return ERR_PTR(-ENAMETOOLONG);
247
Dave Chinner0cb97762013-08-12 20:50:09 +1000248 xfs_dentry_to_name(&name, dentry, 0);
Barry Naujok384f3ce2008-05-21 16:58:22 +1000249 error = xfs_lookup(XFS_I(dir), &name, &cip, NULL);
Nathan Scott67fcaa72006-06-09 17:00:52 +1000250 if (unlikely(error)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700251 if (unlikely(error != ENOENT))
252 return ERR_PTR(-error);
253 d_add(dentry, NULL);
254 return NULL;
255 }
256
David Chinner01651642008-08-13 15:45:15 +1000257 return d_splice_alias(VFS_I(cip), dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700258}
259
Barry Naujok384f3ce2008-05-21 16:58:22 +1000260STATIC struct dentry *
261xfs_vn_ci_lookup(
262 struct inode *dir,
263 struct dentry *dentry,
Al Viro00cd8dd2012-06-10 17:13:09 -0400264 unsigned int flags)
Barry Naujok384f3ce2008-05-21 16:58:22 +1000265{
266 struct xfs_inode *ip;
267 struct xfs_name xname;
268 struct xfs_name ci_name;
269 struct qstr dname;
270 int error;
271
272 if (dentry->d_name.len >= MAXNAMELEN)
273 return ERR_PTR(-ENAMETOOLONG);
274
Dave Chinner0cb97762013-08-12 20:50:09 +1000275 xfs_dentry_to_name(&xname, dentry, 0);
Barry Naujok384f3ce2008-05-21 16:58:22 +1000276 error = xfs_lookup(XFS_I(dir), &xname, &ip, &ci_name);
277 if (unlikely(error)) {
278 if (unlikely(error != ENOENT))
279 return ERR_PTR(-error);
Barry Naujok866d5dc2008-05-22 17:21:40 +1000280 /*
281 * call d_add(dentry, NULL) here when d_drop_negative_children
282 * is called in xfs_vn_mknod (ie. allow negative dentries
283 * with CI filesystems).
284 */
Barry Naujok384f3ce2008-05-21 16:58:22 +1000285 return NULL;
286 }
287
288 /* if exact match, just splice and exit */
289 if (!ci_name.name)
David Chinner01651642008-08-13 15:45:15 +1000290 return d_splice_alias(VFS_I(ip), dentry);
Barry Naujok384f3ce2008-05-21 16:58:22 +1000291
292 /* else case-insensitive match... */
293 dname.name = ci_name.name;
294 dname.len = ci_name.len;
Christoph Hellwige45b5902008-08-07 23:49:07 +0200295 dentry = d_add_ci(dentry, VFS_I(ip), &dname);
Barry Naujok384f3ce2008-05-21 16:58:22 +1000296 kmem_free(ci_name.name);
297 return dentry;
298}
299
Linus Torvalds1da177e2005-04-16 15:20:36 -0700300STATIC int
Nathan Scott416c6d52006-03-14 14:00:51 +1100301xfs_vn_link(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700302 struct dentry *old_dentry,
303 struct inode *dir,
304 struct dentry *dentry)
305{
Christoph Hellwigd9424b32008-12-03 12:20:27 +0100306 struct inode *inode = old_dentry->d_inode;
Barry Naujok556b8b12008-04-10 12:22:07 +1000307 struct xfs_name name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308 int error;
309
Dave Chinner0cb97762013-08-12 20:50:09 +1000310 xfs_dentry_to_name(&name, dentry, inode->i_mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311
Barry Naujok556b8b12008-04-10 12:22:07 +1000312 error = xfs_link(XFS_I(dir), XFS_I(inode), &name);
Christoph Hellwigd9424b32008-12-03 12:20:27 +0100313 if (unlikely(error))
Christoph Hellwiga3da7892008-03-06 13:46:12 +1100314 return -error;
Christoph Hellwiga3da7892008-03-06 13:46:12 +1100315
Al Viro7de9c6ee2010-10-23 11:11:40 -0400316 ihold(inode);
Christoph Hellwiga3da7892008-03-06 13:46:12 +1100317 d_instantiate(dentry, inode);
318 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700319}
320
321STATIC int
Nathan Scott416c6d52006-03-14 14:00:51 +1100322xfs_vn_unlink(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700323 struct inode *dir,
324 struct dentry *dentry)
325{
Barry Naujok556b8b12008-04-10 12:22:07 +1000326 struct xfs_name name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700327 int error;
328
Dave Chinner0cb97762013-08-12 20:50:09 +1000329 xfs_dentry_to_name(&name, dentry, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700330
Christoph Hellwige5700702008-06-23 13:25:25 +1000331 error = -xfs_remove(XFS_I(dir), &name, XFS_I(dentry->d_inode));
332 if (error)
333 return error;
334
335 /*
336 * With unlink, the VFS makes the dentry "negative": no inode,
337 * but still hashed. This is incompatible with case-insensitive
338 * mode, so invalidate (unhash) the dentry in CI-mode.
339 */
340 if (xfs_sb_version_hasasciici(&XFS_M(dir->i_sb)->m_sb))
341 d_invalidate(dentry);
342 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700343}
344
345STATIC int
Nathan Scott416c6d52006-03-14 14:00:51 +1100346xfs_vn_symlink(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700347 struct inode *dir,
348 struct dentry *dentry,
349 const char *symname)
350{
Christoph Hellwig3937be52008-03-06 13:46:19 +1100351 struct inode *inode;
352 struct xfs_inode *cip = NULL;
Barry Naujok556b8b12008-04-10 12:22:07 +1000353 struct xfs_name name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354 int error;
Al Viro576b1d62011-07-26 02:50:15 -0400355 umode_t mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700356
Christoph Hellwig3e5daf02007-10-11 18:09:12 +1000357 mode = S_IFLNK |
Al Viroce3b0f82009-03-29 19:08:22 -0400358 (irix_symlink_mode ? 0777 & ~current_umask() : S_IRWXUGO);
Dave Chinner0cb97762013-08-12 20:50:09 +1000359 xfs_dentry_to_name(&name, dentry, mode);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700360
Christoph Hellwig6c77b0e2010-10-06 18:41:17 +0000361 error = xfs_symlink(XFS_I(dir), &name, symname, mode, &cip);
Christoph Hellwig3937be52008-03-06 13:46:19 +1100362 if (unlikely(error))
363 goto out;
364
David Chinner01651642008-08-13 15:45:15 +1000365 inode = VFS_I(cip);
Christoph Hellwig3937be52008-03-06 13:46:19 +1100366
Eric Paris2a7dba32011-02-01 11:05:39 -0500367 error = xfs_init_security(inode, dir, &dentry->d_name);
Christoph Hellwig3937be52008-03-06 13:46:19 +1100368 if (unlikely(error))
369 goto out_cleanup_inode;
370
371 d_instantiate(dentry, inode);
Christoph Hellwig3937be52008-03-06 13:46:19 +1100372 return 0;
373
374 out_cleanup_inode:
Christoph Hellwig8f112e32008-06-23 13:25:17 +1000375 xfs_cleanup_inode(dir, inode, dentry);
Brian Fosterd540e432014-05-06 07:34:28 +1000376 iput(inode);
Christoph Hellwig3937be52008-03-06 13:46:19 +1100377 out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700378 return -error;
379}
380
381STATIC int
Nathan Scott416c6d52006-03-14 14:00:51 +1100382xfs_vn_rename(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383 struct inode *odir,
384 struct dentry *odentry,
385 struct inode *ndir,
386 struct dentry *ndentry)
387{
388 struct inode *new_inode = ndentry->d_inode;
Barry Naujok556b8b12008-04-10 12:22:07 +1000389 struct xfs_name oname;
390 struct xfs_name nname;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700391
Dave Chinner0cb97762013-08-12 20:50:09 +1000392 xfs_dentry_to_name(&oname, odentry, 0);
393 xfs_dentry_to_name(&nname, ndentry, odentry->d_inode->i_mode);
Barry Naujok556b8b12008-04-10 12:22:07 +1000394
Christoph Hellwige5700702008-06-23 13:25:25 +1000395 return -xfs_rename(XFS_I(odir), &oname, XFS_I(odentry->d_inode),
Christoph Hellwigcfa853e2008-04-22 17:34:06 +1000396 XFS_I(ndir), &nname, new_inode ?
Dave Chinner0cb97762013-08-12 20:50:09 +1000397 XFS_I(new_inode) : NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700398}
399
400/*
401 * careful here - this function can get called recursively, so
402 * we need to be very careful about how much stack we use.
403 * uio is kmalloced for this reason...
404 */
Al Viro008b1502005-08-20 00:17:39 +0100405STATIC void *
Nathan Scott416c6d52006-03-14 14:00:51 +1100406xfs_vn_follow_link(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700407 struct dentry *dentry,
408 struct nameidata *nd)
409{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700410 char *link;
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000411 int error = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700412
Panagiotis Issarisf52720c2006-09-27 01:49:39 -0700413 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000414 if (!link)
415 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700416
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000417 error = -xfs_readlink(XFS_I(dentry->d_inode), link);
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000418 if (unlikely(error))
419 goto out_kfree;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420
421 nd_set_link(nd, link);
Al Viro008b1502005-08-20 00:17:39 +0100422 return NULL;
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000423
424 out_kfree:
425 kfree(link);
426 out_err:
427 nd_set_link(nd, ERR_PTR(error));
428 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429}
430
Christoph Hellwig45767582008-02-05 12:13:24 +1100431STATIC int
Nathan Scott416c6d52006-03-14 14:00:51 +1100432xfs_vn_getattr(
Christoph Hellwigc43f4082007-10-11 17:46:39 +1000433 struct vfsmount *mnt,
434 struct dentry *dentry,
435 struct kstat *stat)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436{
Christoph Hellwigc43f4082007-10-11 17:46:39 +1000437 struct inode *inode = dentry->d_inode;
438 struct xfs_inode *ip = XFS_I(inode);
439 struct xfs_mount *mp = ip->i_mount;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700440
Christoph Hellwigcca28fb2010-06-24 11:57:09 +1000441 trace_xfs_getattr(ip);
Christoph Hellwigc43f4082007-10-11 17:46:39 +1000442
443 if (XFS_FORCED_SHUTDOWN(mp))
Mitsuo Hayasakaed322012011-09-17 13:38:38 +0000444 return -XFS_ERROR(EIO);
Christoph Hellwigc43f4082007-10-11 17:46:39 +1000445
446 stat->size = XFS_ISIZE(ip);
447 stat->dev = inode->i_sb->s_dev;
448 stat->mode = ip->i_d.di_mode;
449 stat->nlink = ip->i_d.di_nlink;
Dwight Engen7aab1b22013-08-15 14:08:01 -0400450 stat->uid = inode->i_uid;
451 stat->gid = inode->i_gid;
Christoph Hellwigc43f4082007-10-11 17:46:39 +1000452 stat->ino = ip->i_ino;
Christoph Hellwigc43f4082007-10-11 17:46:39 +1000453 stat->atime = inode->i_atime;
Christoph Hellwigf9581b12009-10-06 20:29:26 +0000454 stat->mtime = inode->i_mtime;
455 stat->ctime = inode->i_ctime;
Christoph Hellwigc43f4082007-10-11 17:46:39 +1000456 stat->blocks =
457 XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks);
458
459
460 switch (inode->i_mode & S_IFMT) {
461 case S_IFBLK:
462 case S_IFCHR:
463 stat->blksize = BLKDEV_IOSIZE;
464 stat->rdev = MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
465 sysv_minor(ip->i_df.if_u2.if_rdev));
466 break;
467 default:
Eric Sandeen71ddabb2007-11-23 16:29:42 +1100468 if (XFS_IS_REALTIME_INODE(ip)) {
Christoph Hellwigc43f4082007-10-11 17:46:39 +1000469 /*
470 * If the file blocks are being allocated from a
471 * realtime volume, then return the inode's realtime
472 * extent size or the realtime volume's extent size.
473 */
474 stat->blksize =
475 xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog;
476 } else
477 stat->blksize = xfs_preferred_iosize(mp);
478 stat->rdev = 0;
479 break;
Nathan Scott69e23b92006-09-28 11:01:22 +1000480 }
Christoph Hellwigc43f4082007-10-11 17:46:39 +1000481
482 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700483}
484
Dave Chinner56c19e82013-05-27 16:38:25 +1000485static void
486xfs_setattr_mode(
Dave Chinner56c19e82013-05-27 16:38:25 +1000487 struct xfs_inode *ip,
488 struct iattr *iattr)
489{
Christoph Hellwig0c3d88d2013-11-18 05:10:40 -0800490 struct inode *inode = VFS_I(ip);
491 umode_t mode = iattr->ia_mode;
Dave Chinner56c19e82013-05-27 16:38:25 +1000492
Dave Chinner56c19e82013-05-27 16:38:25 +1000493 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
494
Dave Chinner56c19e82013-05-27 16:38:25 +1000495 ip->i_d.di_mode &= S_IFMT;
496 ip->i_d.di_mode |= mode & ~S_IFMT;
497
498 inode->i_mode &= S_IFMT;
499 inode->i_mode |= mode & ~S_IFMT;
500}
501
Christoph Hellwigc91c46c2013-11-18 05:10:52 -0800502static void
503xfs_setattr_time(
504 struct xfs_inode *ip,
505 struct iattr *iattr)
506{
507 struct inode *inode = VFS_I(ip);
508
509 ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
510
511 if (iattr->ia_valid & ATTR_ATIME) {
512 inode->i_atime = iattr->ia_atime;
513 ip->i_d.di_atime.t_sec = iattr->ia_atime.tv_sec;
514 ip->i_d.di_atime.t_nsec = iattr->ia_atime.tv_nsec;
515 }
516 if (iattr->ia_valid & ATTR_CTIME) {
517 inode->i_ctime = iattr->ia_ctime;
518 ip->i_d.di_ctime.t_sec = iattr->ia_ctime.tv_sec;
519 ip->i_d.di_ctime.t_nsec = iattr->ia_ctime.tv_nsec;
520 }
521 if (iattr->ia_valid & ATTR_MTIME) {
522 inode->i_mtime = iattr->ia_mtime;
523 ip->i_d.di_mtime.t_sec = iattr->ia_mtime.tv_sec;
524 ip->i_d.di_mtime.t_nsec = iattr->ia_mtime.tv_nsec;
525 }
526}
527
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200528int
529xfs_setattr_nonsize(
530 struct xfs_inode *ip,
531 struct iattr *iattr,
532 int flags)
533{
534 xfs_mount_t *mp = ip->i_mount;
535 struct inode *inode = VFS_I(ip);
536 int mask = iattr->ia_valid;
537 xfs_trans_t *tp;
538 int error;
Dwight Engen7aab1b22013-08-15 14:08:01 -0400539 kuid_t uid = GLOBAL_ROOT_UID, iuid = GLOBAL_ROOT_UID;
540 kgid_t gid = GLOBAL_ROOT_GID, igid = GLOBAL_ROOT_GID;
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200541 struct xfs_dquot *udqp = NULL, *gdqp = NULL;
542 struct xfs_dquot *olddquot1 = NULL, *olddquot2 = NULL;
543
544 trace_xfs_setattr(ip);
545
Carlos Maiolino42c49d72013-06-21 14:45:53 -0300546 /* If acls are being inherited, we already have this checked */
547 if (!(flags & XFS_ATTR_NOACL)) {
548 if (mp->m_flags & XFS_MOUNT_RDONLY)
549 return XFS_ERROR(EROFS);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200550
Carlos Maiolino42c49d72013-06-21 14:45:53 -0300551 if (XFS_FORCED_SHUTDOWN(mp))
552 return XFS_ERROR(EIO);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200553
Carlos Maiolino42c49d72013-06-21 14:45:53 -0300554 error = -inode_change_ok(inode, iattr);
555 if (error)
556 return XFS_ERROR(error);
557 }
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200558
559 ASSERT((mask & ATTR_SIZE) == 0);
560
561 /*
562 * If disk quotas is on, we make sure that the dquots do exist on disk,
563 * before we start any other transactions. Trying to do this later
564 * is messy. We don't care to take a readlock to look at the ids
565 * in inode here, because we can't hold it across the trans_reserve.
566 * If the IDs do change before we take the ilock, we're covered
567 * because the i_*dquot fields will get updated anyway.
568 */
569 if (XFS_IS_QUOTA_ON(mp) && (mask & (ATTR_UID|ATTR_GID))) {
570 uint qflags = 0;
571
572 if ((mask & ATTR_UID) && XFS_IS_UQUOTA_ON(mp)) {
573 uid = iattr->ia_uid;
574 qflags |= XFS_QMOPT_UQUOTA;
575 } else {
Dwight Engen7aab1b22013-08-15 14:08:01 -0400576 uid = inode->i_uid;
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200577 }
578 if ((mask & ATTR_GID) && XFS_IS_GQUOTA_ON(mp)) {
579 gid = iattr->ia_gid;
580 qflags |= XFS_QMOPT_GQUOTA;
581 } else {
Dwight Engen7aab1b22013-08-15 14:08:01 -0400582 gid = inode->i_gid;
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200583 }
584
585 /*
586 * We take a reference when we initialize udqp and gdqp,
587 * so it is important that we never blindly double trip on
588 * the same variable. See xfs_create() for an example.
589 */
590 ASSERT(udqp == NULL);
591 ASSERT(gdqp == NULL);
Dwight Engen7aab1b22013-08-15 14:08:01 -0400592 error = xfs_qm_vop_dqalloc(ip, xfs_kuid_to_uid(uid),
593 xfs_kgid_to_gid(gid),
594 xfs_get_projid(ip),
595 qflags, &udqp, &gdqp, NULL);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200596 if (error)
597 return error;
598 }
599
600 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
Jie Liu3d3c8b52013-08-12 20:49:59 +1000601 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200602 if (error)
603 goto out_dqrele;
604
605 xfs_ilock(ip, XFS_ILOCK_EXCL);
606
607 /*
608 * Change file ownership. Must be the owner or privileged.
609 */
610 if (mask & (ATTR_UID|ATTR_GID)) {
611 /*
612 * These IDs could have changed since we last looked at them.
613 * But, we're assured that if the ownership did change
614 * while we didn't have the inode locked, inode's dquot(s)
615 * would have changed also.
616 */
Dwight Engen7aab1b22013-08-15 14:08:01 -0400617 iuid = inode->i_uid;
618 igid = inode->i_gid;
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200619 gid = (mask & ATTR_GID) ? iattr->ia_gid : igid;
620 uid = (mask & ATTR_UID) ? iattr->ia_uid : iuid;
621
622 /*
623 * Do a quota reservation only if uid/gid is actually
624 * going to change.
625 */
626 if (XFS_IS_QUOTA_RUNNING(mp) &&
Dwight Engen7aab1b22013-08-15 14:08:01 -0400627 ((XFS_IS_UQUOTA_ON(mp) && !uid_eq(iuid, uid)) ||
628 (XFS_IS_GQUOTA_ON(mp) && !gid_eq(igid, gid)))) {
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200629 ASSERT(tp);
630 error = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
Chandra Seetharaman92f8ff72013-07-11 00:00:40 -0500631 NULL, capable(CAP_FOWNER) ?
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200632 XFS_QMOPT_FORCE_RES : 0);
633 if (error) /* out of quota */
634 goto out_trans_cancel;
635 }
636 }
637
Christoph Hellwigddc34152011-09-19 15:00:54 +0000638 xfs_trans_ijoin(tp, ip, 0);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200639
640 /*
641 * Change file ownership. Must be the owner or privileged.
642 */
643 if (mask & (ATTR_UID|ATTR_GID)) {
644 /*
645 * CAP_FSETID overrides the following restrictions:
646 *
647 * The set-user-ID and set-group-ID bits of a file will be
648 * cleared upon successful return from chown()
649 */
650 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
651 !capable(CAP_FSETID))
652 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
653
654 /*
655 * Change the ownerships and register quota modifications
656 * in the transaction.
657 */
Dwight Engen7aab1b22013-08-15 14:08:01 -0400658 if (!uid_eq(iuid, uid)) {
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200659 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_UQUOTA_ON(mp)) {
660 ASSERT(mask & ATTR_UID);
661 ASSERT(udqp);
662 olddquot1 = xfs_qm_vop_chown(tp, ip,
663 &ip->i_udquot, udqp);
664 }
Dwight Engen7aab1b22013-08-15 14:08:01 -0400665 ip->i_d.di_uid = xfs_kuid_to_uid(uid);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200666 inode->i_uid = uid;
667 }
Dwight Engen7aab1b22013-08-15 14:08:01 -0400668 if (!gid_eq(igid, gid)) {
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200669 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_GQUOTA_ON(mp)) {
Jie Liu5a01dd52013-11-26 21:38:34 +0800670 ASSERT(xfs_sb_version_has_pquotino(&mp->m_sb) ||
671 !XFS_IS_PQUOTA_ON(mp));
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200672 ASSERT(mask & ATTR_GID);
673 ASSERT(gdqp);
674 olddquot2 = xfs_qm_vop_chown(tp, ip,
675 &ip->i_gdquot, gdqp);
676 }
Dwight Engen7aab1b22013-08-15 14:08:01 -0400677 ip->i_d.di_gid = xfs_kgid_to_gid(gid);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200678 inode->i_gid = gid;
679 }
680 }
681
Dave Chinner56c19e82013-05-27 16:38:25 +1000682 if (mask & ATTR_MODE)
Christoph Hellwig0c3d88d2013-11-18 05:10:40 -0800683 xfs_setattr_mode(ip, iattr);
Christoph Hellwigc91c46c2013-11-18 05:10:52 -0800684 if (mask & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME))
685 xfs_setattr_time(ip, iattr);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200686
687 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
688
689 XFS_STATS_INC(xs_ig_attrchg);
690
691 if (mp->m_flags & XFS_MOUNT_WSYNC)
692 xfs_trans_set_sync(tp);
693 error = xfs_trans_commit(tp, 0);
694
695 xfs_iunlock(ip, XFS_ILOCK_EXCL);
696
697 /*
698 * Release any dquot(s) the inode had kept before chown.
699 */
700 xfs_qm_dqrele(olddquot1);
701 xfs_qm_dqrele(olddquot2);
702 xfs_qm_dqrele(udqp);
703 xfs_qm_dqrele(gdqp);
704
705 if (error)
706 return XFS_ERROR(error);
707
708 /*
709 * XXX(hch): Updating the ACL entries is not atomic vs the i_mode
710 * update. We could avoid this with linked transactions
711 * and passing down the transaction pointer all the way
712 * to attr_set. No previous user of the generic
713 * Posix ACL code seems to care about this issue either.
714 */
715 if ((mask & ATTR_MODE) && !(flags & XFS_ATTR_NOACL)) {
Christoph Hellwig2401dc22013-12-20 05:16:50 -0800716 error = -posix_acl_chmod(inode, inode->i_mode);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200717 if (error)
718 return XFS_ERROR(error);
719 }
720
721 return 0;
722
723out_trans_cancel:
724 xfs_trans_cancel(tp, 0);
725 xfs_iunlock(ip, XFS_ILOCK_EXCL);
726out_dqrele:
727 xfs_qm_dqrele(udqp);
728 xfs_qm_dqrele(gdqp);
729 return error;
730}
731
732/*
733 * Truncate file. Must have write permission and not be a directory.
734 */
735int
736xfs_setattr_size(
737 struct xfs_inode *ip,
Christoph Hellwig76ca4c22013-10-14 07:09:35 -0700738 struct iattr *iattr)
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200739{
740 struct xfs_mount *mp = ip->i_mount;
741 struct inode *inode = VFS_I(ip);
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000742 xfs_off_t oldsize, newsize;
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200743 struct xfs_trans *tp;
744 int error;
Christoph Hellwigf38996f2012-03-27 10:34:48 -0400745 uint lock_flags = 0;
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200746 uint commit_flags = 0;
747
748 trace_xfs_setattr(ip);
749
750 if (mp->m_flags & XFS_MOUNT_RDONLY)
751 return XFS_ERROR(EROFS);
752
753 if (XFS_FORCED_SHUTDOWN(mp))
754 return XFS_ERROR(EIO);
755
756 error = -inode_change_ok(inode, iattr);
757 if (error)
758 return XFS_ERROR(error);
759
Christoph Hellwig76ca4c22013-10-14 07:09:35 -0700760 ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL));
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200761 ASSERT(S_ISREG(ip->i_d.di_mode));
Christoph Hellwigfe60a8a2014-02-10 10:35:22 +1100762 ASSERT((iattr->ia_valid & (ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_ATIME_SET|
763 ATTR_MTIME_SET|ATTR_KILL_PRIV|ATTR_TIMES_SET)) == 0);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200764
Christoph Hellwigce7ae1512011-12-18 20:00:11 +0000765 oldsize = inode->i_size;
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000766 newsize = iattr->ia_size;
767
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200768 /*
769 * Short circuit the truncate case for zero length files.
770 */
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000771 if (newsize == 0 && oldsize == 0 && ip->i_d.di_nextents == 0) {
Christoph Hellwigfe60a8a2014-02-10 10:35:22 +1100772 if (!(iattr->ia_valid & (ATTR_CTIME|ATTR_MTIME)))
Christoph Hellwig76ca4c22013-10-14 07:09:35 -0700773 return 0;
Christoph Hellwig681b1202011-07-08 14:34:26 +0200774
775 /*
776 * Use the regular setattr path to update the timestamps.
777 */
Christoph Hellwig681b1202011-07-08 14:34:26 +0200778 iattr->ia_valid &= ~ATTR_SIZE;
779 return xfs_setattr_nonsize(ip, iattr, 0);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200780 }
781
782 /*
783 * Make sure that the dquots are attached to the inode.
784 */
Christoph Hellwigf38996f2012-03-27 10:34:48 -0400785 error = xfs_qm_dqattach(ip, 0);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200786 if (error)
Christoph Hellwig76ca4c22013-10-14 07:09:35 -0700787 return error;
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200788
789 /*
790 * Now we can make the changes. Before we join the inode to the
791 * transaction, take care of the part of the truncation that must be
792 * done without the inode lock. This needs to be done before joining
793 * the inode to the transaction, because the inode cannot be unlocked
794 * once it is a part of the transaction.
795 */
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000796 if (newsize > oldsize) {
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200797 /*
798 * Do the first part of growing a file: zero any data in the
799 * last block that is beyond the old EOF. We need to do this
800 * before the inode is joined to the transaction to modify
801 * i_size.
802 */
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000803 error = xfs_zero_eof(ip, newsize, oldsize);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200804 if (error)
Christoph Hellwig76ca4c22013-10-14 07:09:35 -0700805 return error;
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200806 }
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200807
808 /*
809 * We are going to log the inode size change in this transaction so
810 * any previous writes that are beyond the on disk EOF and the new
811 * EOF that have not been written out need to be written here. If we
812 * do not write the data out, we expose ourselves to the null files
813 * problem.
814 *
815 * Only flush from the on disk size to the smaller of the in memory
816 * file size or the new size as that's the range we really care about
817 * here and prevents waiting for other data not within the range we
818 * care about here.
819 */
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000820 if (oldsize != ip->i_d.di_size && newsize > ip->i_d.di_size) {
Dave Chinner4bc1ea62012-11-12 22:53:56 +1100821 error = -filemap_write_and_wait_range(VFS_I(ip)->i_mapping,
822 ip->i_d.di_size, newsize);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200823 if (error)
Christoph Hellwig76ca4c22013-10-14 07:09:35 -0700824 return error;
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200825 }
826
827 /*
Christoph Hellwig4a06fd22011-08-23 08:28:13 +0000828 * Wait for all direct I/O to complete.
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200829 */
Christoph Hellwig4a06fd22011-08-23 08:28:13 +0000830 inode_dio_wait(inode);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200831
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000832 error = -block_truncate_page(inode->i_mapping, newsize, xfs_get_blocks);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200833 if (error)
Christoph Hellwig76ca4c22013-10-14 07:09:35 -0700834 return error;
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200835
836 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_SIZE);
Jie Liu3d3c8b52013-08-12 20:49:59 +1000837 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_itruncate, 0, 0);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200838 if (error)
839 goto out_trans_cancel;
840
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000841 truncate_setsize(inode, newsize);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200842
843 commit_flags = XFS_TRANS_RELEASE_LOG_RES;
844 lock_flags |= XFS_ILOCK_EXCL;
845
846 xfs_ilock(ip, XFS_ILOCK_EXCL);
847
Christoph Hellwigddc34152011-09-19 15:00:54 +0000848 xfs_trans_ijoin(tp, ip, 0);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200849
850 /*
851 * Only change the c/mtime if we are changing the size or we are
852 * explicitly asked to change it. This handles the semantic difference
853 * between truncate() and ftruncate() as implemented in the VFS.
854 *
855 * The regular truncate() case without ATTR_CTIME and ATTR_MTIME is a
856 * special case where we need to update the times despite not having
857 * these flags set. For all other operations the VFS set these flags
858 * explicitly if it wants a timestamp update.
859 */
Christoph Hellwigfe60a8a2014-02-10 10:35:22 +1100860 if (newsize != oldsize &&
861 !(iattr->ia_valid & (ATTR_CTIME | ATTR_MTIME))) {
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200862 iattr->ia_ctime = iattr->ia_mtime =
863 current_fs_time(inode->i_sb);
Christoph Hellwigfe60a8a2014-02-10 10:35:22 +1100864 iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME;
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200865 }
866
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000867 /*
868 * The first thing we do is set the size to new_size permanently on
869 * disk. This way we don't have to worry about anyone ever being able
870 * to look at the data being freed even in the face of a crash.
871 * What we're getting around here is the case where we free a block, it
872 * is allocated to another file, it is written to, and then we crash.
873 * If the new data gets written to the file but the log buffers
874 * containing the free and reallocation don't, then we'd end up with
875 * garbage in the blocks being freed. As long as we make the new size
876 * permanent before actually freeing any blocks it doesn't matter if
877 * they get written to.
878 */
879 ip->i_d.di_size = newsize;
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000880 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
881
882 if (newsize <= oldsize) {
883 error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, newsize);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200884 if (error)
885 goto out_trans_abort;
886
887 /*
888 * Truncated "down", so we're removing references to old data
889 * here - if we delay flushing for a long time, we expose
890 * ourselves unduly to the notorious NULL files problem. So,
891 * we mark this inode and flush it when the file is closed,
892 * and do not wait the usual (long) time for writeout.
893 */
894 xfs_iflags_set(ip, XFS_ITRUNCATED);
Brian Foster27b52862012-11-06 09:50:38 -0500895
896 /* A truncate down always removes post-EOF blocks. */
897 xfs_inode_clear_eofblocks_tag(ip);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200898 }
899
Christoph Hellwigfe60a8a2014-02-10 10:35:22 +1100900 if (iattr->ia_valid & ATTR_MODE)
Christoph Hellwig0c3d88d2013-11-18 05:10:40 -0800901 xfs_setattr_mode(ip, iattr);
Christoph Hellwigfe60a8a2014-02-10 10:35:22 +1100902 if (iattr->ia_valid & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME))
Christoph Hellwigc91c46c2013-11-18 05:10:52 -0800903 xfs_setattr_time(ip, iattr);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200904
905 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
906
907 XFS_STATS_INC(xs_ig_attrchg);
908
909 if (mp->m_flags & XFS_MOUNT_WSYNC)
910 xfs_trans_set_sync(tp);
911
912 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
913out_unlock:
914 if (lock_flags)
915 xfs_iunlock(ip, lock_flags);
916 return error;
917
918out_trans_abort:
919 commit_flags |= XFS_TRANS_ABORT;
920out_trans_cancel:
921 xfs_trans_cancel(tp, commit_flags);
922 goto out_unlock;
923}
924
Linus Torvalds1da177e2005-04-16 15:20:36 -0700925STATIC int
Nathan Scott416c6d52006-03-14 14:00:51 +1100926xfs_vn_setattr(
Christoph Hellwig76ca4c22013-10-14 07:09:35 -0700927 struct dentry *dentry,
928 struct iattr *iattr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700929{
Christoph Hellwig76ca4c22013-10-14 07:09:35 -0700930 struct xfs_inode *ip = XFS_I(dentry->d_inode);
931 int error;
932
933 if (iattr->ia_valid & ATTR_SIZE) {
934 xfs_ilock(ip, XFS_IOLOCK_EXCL);
935 error = xfs_setattr_size(ip, iattr);
936 xfs_iunlock(ip, XFS_IOLOCK_EXCL);
937 } else {
938 error = xfs_setattr_nonsize(ip, iattr, 0);
939 }
940
941 return -error;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700942}
943
Christoph Hellwig69ff2822012-06-06 17:01:28 -0400944STATIC int
945xfs_vn_update_time(
946 struct inode *inode,
947 struct timespec *now,
948 int flags)
949{
950 struct xfs_inode *ip = XFS_I(inode);
951 struct xfs_mount *mp = ip->i_mount;
952 struct xfs_trans *tp;
953 int error;
954
955 trace_xfs_update_time(ip);
956
957 tp = xfs_trans_alloc(mp, XFS_TRANS_FSYNC_TS);
Jie Liu3d3c8b52013-08-12 20:49:59 +1000958 error = xfs_trans_reserve(tp, &M_RES(mp)->tr_fsyncts, 0, 0);
Christoph Hellwig69ff2822012-06-06 17:01:28 -0400959 if (error) {
960 xfs_trans_cancel(tp, 0);
961 return -error;
962 }
963
964 xfs_ilock(ip, XFS_ILOCK_EXCL);
965 if (flags & S_CTIME) {
966 inode->i_ctime = *now;
967 ip->i_d.di_ctime.t_sec = (__int32_t)now->tv_sec;
968 ip->i_d.di_ctime.t_nsec = (__int32_t)now->tv_nsec;
969 }
970 if (flags & S_MTIME) {
971 inode->i_mtime = *now;
972 ip->i_d.di_mtime.t_sec = (__int32_t)now->tv_sec;
973 ip->i_d.di_mtime.t_nsec = (__int32_t)now->tv_nsec;
974 }
975 if (flags & S_ATIME) {
976 inode->i_atime = *now;
977 ip->i_d.di_atime.t_sec = (__int32_t)now->tv_sec;
978 ip->i_d.di_atime.t_nsec = (__int32_t)now->tv_nsec;
979 }
980 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
981 xfs_trans_log_inode(tp, ip, XFS_ILOG_TIMESTAMP);
982 return -xfs_trans_commit(tp, 0);
983}
984
Eric Sandeenf35642e2008-11-28 14:23:35 +1100985#define XFS_FIEMAP_FLAGS (FIEMAP_FLAG_SYNC|FIEMAP_FLAG_XATTR)
986
987/*
988 * Call fiemap helper to fill in user data.
989 * Returns positive errors to xfs_getbmap.
990 */
991STATIC int
992xfs_fiemap_format(
993 void **arg,
994 struct getbmapx *bmv,
995 int *full)
996{
997 int error;
998 struct fiemap_extent_info *fieinfo = *arg;
999 u32 fiemap_flags = 0;
1000 u64 logical, physical, length;
1001
1002 /* Do nothing for a hole */
1003 if (bmv->bmv_block == -1LL)
1004 return 0;
1005
1006 logical = BBTOB(bmv->bmv_offset);
1007 physical = BBTOB(bmv->bmv_block);
1008 length = BBTOB(bmv->bmv_length);
1009
1010 if (bmv->bmv_oflags & BMV_OF_PREALLOC)
1011 fiemap_flags |= FIEMAP_EXTENT_UNWRITTEN;
1012 else if (bmv->bmv_oflags & BMV_OF_DELALLOC) {
Jie Liu635c4d02013-06-06 06:24:01 -07001013 fiemap_flags |= (FIEMAP_EXTENT_DELALLOC |
1014 FIEMAP_EXTENT_UNKNOWN);
Eric Sandeenf35642e2008-11-28 14:23:35 +11001015 physical = 0; /* no block yet */
1016 }
1017 if (bmv->bmv_oflags & BMV_OF_LAST)
1018 fiemap_flags |= FIEMAP_EXTENT_LAST;
1019
1020 error = fiemap_fill_next_extent(fieinfo, logical, physical,
1021 length, fiemap_flags);
1022 if (error > 0) {
1023 error = 0;
1024 *full = 1; /* user array now full */
1025 }
1026
1027 return -error;
1028}
1029
1030STATIC int
1031xfs_vn_fiemap(
1032 struct inode *inode,
1033 struct fiemap_extent_info *fieinfo,
1034 u64 start,
1035 u64 length)
1036{
1037 xfs_inode_t *ip = XFS_I(inode);
1038 struct getbmapx bm;
1039 int error;
1040
1041 error = fiemap_check_flags(fieinfo, XFS_FIEMAP_FLAGS);
1042 if (error)
1043 return error;
1044
1045 /* Set up bmap header for xfs internal routine */
1046 bm.bmv_offset = BTOBB(start);
1047 /* Special case for whole file */
1048 if (length == FIEMAP_MAX_OFFSET)
1049 bm.bmv_length = -1LL;
1050 else
1051 bm.bmv_length = BTOBB(length);
1052
Eric Sandeen97db39a2009-07-26 21:52:01 -05001053 /* We add one because in getbmap world count includes the header */
Tao Ma2d1ff3c2010-04-29 15:13:56 +10001054 bm.bmv_count = !fieinfo->fi_extents_max ? MAXEXTNUM :
1055 fieinfo->fi_extents_max + 1;
1056 bm.bmv_count = min_t(__s32, bm.bmv_count,
1057 (PAGE_SIZE * 16 / sizeof(struct getbmapx)));
Tao Ma9af25462010-08-30 02:44:03 +00001058 bm.bmv_iflags = BMV_IF_PREALLOC | BMV_IF_NO_HOLES;
Eric Sandeenf35642e2008-11-28 14:23:35 +11001059 if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR)
1060 bm.bmv_iflags |= BMV_IF_ATTRFORK;
1061 if (!(fieinfo->fi_flags & FIEMAP_FLAG_SYNC))
1062 bm.bmv_iflags |= BMV_IF_DELALLOC;
1063
1064 error = xfs_getbmap(ip, &bm, xfs_fiemap_format, fieinfo);
1065 if (error)
1066 return -error;
1067
1068 return 0;
1069}
1070
Zhi Yong Wu99b64362013-12-18 08:22:40 +08001071STATIC int
1072xfs_vn_tmpfile(
1073 struct inode *dir,
1074 struct dentry *dentry,
1075 umode_t mode)
1076{
Brian Fosterd540e432014-05-06 07:34:28 +10001077 return xfs_generic_create(dir, dentry, mode, 0, true);
Zhi Yong Wu99b64362013-12-18 08:22:40 +08001078}
1079
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001080static const struct inode_operations xfs_inode_operations = {
Christoph Hellwig4e34e712011-07-23 17:37:31 +02001081 .get_acl = xfs_get_acl,
Christoph Hellwig2401dc22013-12-20 05:16:50 -08001082 .set_acl = xfs_set_acl,
Nathan Scott416c6d52006-03-14 14:00:51 +11001083 .getattr = xfs_vn_getattr,
1084 .setattr = xfs_vn_setattr,
Lachlan McIlroy0ec58512008-06-23 13:23:01 +10001085 .setxattr = generic_setxattr,
1086 .getxattr = generic_getxattr,
1087 .removexattr = generic_removexattr,
Nathan Scott416c6d52006-03-14 14:00:51 +11001088 .listxattr = xfs_vn_listxattr,
Eric Sandeenf35642e2008-11-28 14:23:35 +11001089 .fiemap = xfs_vn_fiemap,
Christoph Hellwig69ff2822012-06-06 17:01:28 -04001090 .update_time = xfs_vn_update_time,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001091};
1092
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001093static const struct inode_operations xfs_dir_inode_operations = {
Nathan Scott416c6d52006-03-14 14:00:51 +11001094 .create = xfs_vn_create,
1095 .lookup = xfs_vn_lookup,
1096 .link = xfs_vn_link,
1097 .unlink = xfs_vn_unlink,
1098 .symlink = xfs_vn_symlink,
1099 .mkdir = xfs_vn_mkdir,
Christoph Hellwig8f112e32008-06-23 13:25:17 +10001100 /*
1101 * Yes, XFS uses the same method for rmdir and unlink.
1102 *
1103 * There are some subtile differences deeper in the code,
1104 * but we use S_ISDIR to check for those.
1105 */
1106 .rmdir = xfs_vn_unlink,
Nathan Scott416c6d52006-03-14 14:00:51 +11001107 .mknod = xfs_vn_mknod,
1108 .rename = xfs_vn_rename,
Christoph Hellwig4e34e712011-07-23 17:37:31 +02001109 .get_acl = xfs_get_acl,
Christoph Hellwig2401dc22013-12-20 05:16:50 -08001110 .set_acl = xfs_set_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,
Christoph Hellwig69ff2822012-06-06 17:01:28 -04001117 .update_time = xfs_vn_update_time,
Zhi Yong Wu99b64362013-12-18 08:22:40 +08001118 .tmpfile = xfs_vn_tmpfile,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001119};
1120
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001121static const struct inode_operations xfs_dir_ci_inode_operations = {
Barry Naujok384f3ce2008-05-21 16:58:22 +10001122 .create = xfs_vn_create,
1123 .lookup = xfs_vn_ci_lookup,
1124 .link = xfs_vn_link,
1125 .unlink = xfs_vn_unlink,
1126 .symlink = xfs_vn_symlink,
1127 .mkdir = xfs_vn_mkdir,
Christoph Hellwig8f112e32008-06-23 13:25:17 +10001128 /*
1129 * Yes, XFS uses the same method for rmdir and unlink.
1130 *
1131 * There are some subtile differences deeper in the code,
1132 * but we use S_ISDIR to check for those.
1133 */
1134 .rmdir = xfs_vn_unlink,
Barry Naujok384f3ce2008-05-21 16:58:22 +10001135 .mknod = xfs_vn_mknod,
1136 .rename = xfs_vn_rename,
Christoph Hellwig4e34e712011-07-23 17:37:31 +02001137 .get_acl = xfs_get_acl,
Christoph Hellwig2401dc22013-12-20 05:16:50 -08001138 .set_acl = xfs_set_acl,
Barry Naujok384f3ce2008-05-21 16:58:22 +10001139 .getattr = xfs_vn_getattr,
1140 .setattr = xfs_vn_setattr,
Lachlan McIlroy0ec58512008-06-23 13:23:01 +10001141 .setxattr = generic_setxattr,
1142 .getxattr = generic_getxattr,
1143 .removexattr = generic_removexattr,
Barry Naujok384f3ce2008-05-21 16:58:22 +10001144 .listxattr = xfs_vn_listxattr,
Christoph Hellwig69ff2822012-06-06 17:01:28 -04001145 .update_time = xfs_vn_update_time,
Zhi Yong Wu99b64362013-12-18 08:22:40 +08001146 .tmpfile = xfs_vn_tmpfile,
Barry Naujok384f3ce2008-05-21 16:58:22 +10001147};
1148
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001149static const struct inode_operations xfs_symlink_inode_operations = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001150 .readlink = generic_readlink,
Nathan Scott416c6d52006-03-14 14:00:51 +11001151 .follow_link = xfs_vn_follow_link,
Al Viro96c8c442013-11-29 22:54:55 -05001152 .put_link = kfree_put_link,
Nathan Scott416c6d52006-03-14 14:00:51 +11001153 .getattr = xfs_vn_getattr,
1154 .setattr = xfs_vn_setattr,
Lachlan McIlroy0ec58512008-06-23 13:23:01 +10001155 .setxattr = generic_setxattr,
1156 .getxattr = generic_getxattr,
1157 .removexattr = generic_removexattr,
Nathan Scott416c6d52006-03-14 14:00:51 +11001158 .listxattr = xfs_vn_listxattr,
Christoph Hellwig69ff2822012-06-06 17:01:28 -04001159 .update_time = xfs_vn_update_time,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001160};
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001161
1162STATIC void
1163xfs_diflags_to_iflags(
1164 struct inode *inode,
1165 struct xfs_inode *ip)
1166{
1167 if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE)
1168 inode->i_flags |= S_IMMUTABLE;
1169 else
1170 inode->i_flags &= ~S_IMMUTABLE;
1171 if (ip->i_d.di_flags & XFS_DIFLAG_APPEND)
1172 inode->i_flags |= S_APPEND;
1173 else
1174 inode->i_flags &= ~S_APPEND;
1175 if (ip->i_d.di_flags & XFS_DIFLAG_SYNC)
1176 inode->i_flags |= S_SYNC;
1177 else
1178 inode->i_flags &= ~S_SYNC;
1179 if (ip->i_d.di_flags & XFS_DIFLAG_NOATIME)
1180 inode->i_flags |= S_NOATIME;
1181 else
1182 inode->i_flags &= ~S_NOATIME;
1183}
1184
1185/*
1186 * Initialize the Linux inode, set up the operation vectors and
1187 * unlock the inode.
1188 *
1189 * When reading existing inodes from disk this is called directly
1190 * from xfs_iget, when creating a new inode it is called from
1191 * xfs_ialloc after setting up the inode.
David Chinnerbf904242008-10-30 17:36:14 +11001192 *
1193 * We are always called with an uninitialised linux inode here.
1194 * We need to initialise the necessary fields and take a reference
1195 * on it.
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001196 */
1197void
1198xfs_setup_inode(
1199 struct xfs_inode *ip)
1200{
David Chinnerbf904242008-10-30 17:36:14 +11001201 struct inode *inode = &ip->i_vnode;
Dave Chinnerad22c7a2013-10-29 22:11:57 +11001202 gfp_t gfp_mask;
David Chinnerbf904242008-10-30 17:36:14 +11001203
1204 inode->i_ino = ip->i_ino;
Christoph Hellwigeaff8072009-12-17 14:25:01 +01001205 inode->i_state = I_NEW;
Christoph Hellwig646ec462010-10-23 07:15:32 -04001206
1207 inode_sb_list_add(inode);
Christoph Hellwigc6f6cd02010-11-06 11:43:08 +00001208 /* make the inode look hashed for the writeback code */
1209 hlist_add_fake(&inode->i_hash);
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001210
1211 inode->i_mode = ip->i_d.di_mode;
Miklos Szeredibfe86842011-10-28 14:13:29 +02001212 set_nlink(inode, ip->i_d.di_nlink);
Dwight Engen7aab1b22013-08-15 14:08:01 -04001213 inode->i_uid = xfs_uid_to_kuid(ip->i_d.di_uid);
1214 inode->i_gid = xfs_gid_to_kgid(ip->i_d.di_gid);
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001215
1216 switch (inode->i_mode & S_IFMT) {
1217 case S_IFBLK:
1218 case S_IFCHR:
1219 inode->i_rdev =
1220 MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
1221 sysv_minor(ip->i_df.if_u2.if_rdev));
1222 break;
1223 default:
1224 inode->i_rdev = 0;
1225 break;
1226 }
1227
1228 inode->i_generation = ip->i_d.di_gen;
1229 i_size_write(inode, ip->i_d.di_size);
1230 inode->i_atime.tv_sec = ip->i_d.di_atime.t_sec;
1231 inode->i_atime.tv_nsec = ip->i_d.di_atime.t_nsec;
1232 inode->i_mtime.tv_sec = ip->i_d.di_mtime.t_sec;
1233 inode->i_mtime.tv_nsec = ip->i_d.di_mtime.t_nsec;
1234 inode->i_ctime.tv_sec = ip->i_d.di_ctime.t_sec;
1235 inode->i_ctime.tv_nsec = ip->i_d.di_ctime.t_nsec;
1236 xfs_diflags_to_iflags(inode, ip);
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001237
Dave Chinner4bceb182013-10-29 22:11:51 +11001238 ip->d_ops = ip->i_mount->m_nondir_inode_ops;
Dave Chinner93a86142014-02-27 16:51:39 +11001239 lockdep_set_class(&ip->i_lock.mr_lock, &xfs_nondir_ilock_class);
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001240 switch (inode->i_mode & S_IFMT) {
1241 case S_IFREG:
1242 inode->i_op = &xfs_inode_operations;
1243 inode->i_fop = &xfs_file_operations;
1244 inode->i_mapping->a_ops = &xfs_address_space_operations;
1245 break;
1246 case S_IFDIR:
Dave Chinner93a86142014-02-27 16:51:39 +11001247 lockdep_set_class(&ip->i_lock.mr_lock, &xfs_dir_ilock_class);
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001248 if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb))
1249 inode->i_op = &xfs_dir_ci_inode_operations;
1250 else
1251 inode->i_op = &xfs_dir_inode_operations;
1252 inode->i_fop = &xfs_dir_file_operations;
Dave Chinner32c54832013-10-29 22:11:46 +11001253 ip->d_ops = ip->i_mount->m_dir_inode_ops;
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001254 break;
1255 case S_IFLNK:
1256 inode->i_op = &xfs_symlink_inode_operations;
1257 if (!(ip->i_df.if_flags & XFS_IFINLINE))
1258 inode->i_mapping->a_ops = &xfs_address_space_operations;
1259 break;
1260 default:
1261 inode->i_op = &xfs_inode_operations;
1262 init_special_inode(inode, inode->i_mode, inode->i_rdev);
1263 break;
1264 }
1265
Christoph Hellwig510792e2011-07-26 15:07:29 +00001266 /*
Dave Chinnerad22c7a2013-10-29 22:11:57 +11001267 * Ensure all page cache allocations are done from GFP_NOFS context to
1268 * prevent direct reclaim recursion back into the filesystem and blowing
1269 * stacks or deadlocking.
1270 */
1271 gfp_mask = mapping_gfp_mask(inode->i_mapping);
1272 mapping_set_gfp_mask(inode->i_mapping, (gfp_mask & ~(__GFP_FS)));
1273
1274 /*
Christoph Hellwig510792e2011-07-26 15:07:29 +00001275 * If there is no attribute fork no ACL can exist on this inode,
1276 * and it can't have any file capabilities attached to it either.
1277 */
1278 if (!XFS_IFORK_Q(ip)) {
1279 inode_has_no_xattr(inode);
Christoph Hellwig6311b102011-07-23 17:36:50 +02001280 cache_no_acl(inode);
Christoph Hellwig510792e2011-07-26 15:07:29 +00001281 }
Christoph Hellwig6311b102011-07-23 17:36:50 +02001282
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001283 xfs_iflags_clear(ip, XFS_INEW);
1284 barrier();
1285
1286 unlock_new_inode(inode);
1287}