blob: d82efaa2ac7350553c8804c014c5f299809af178 [file] [log] [blame]
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"
Linus Torvalds1da177e2005-04-16 15:20:36 -070021#include "xfs_log.h"
22#include "xfs_trans.h"
23#include "xfs_sb.h"
24#include "xfs_ag.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070025#include "xfs_alloc.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070026#include "xfs_quota.h"
27#include "xfs_mount.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include "xfs_bmap_btree.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#include "xfs_dinode.h"
30#include "xfs_inode.h"
31#include "xfs_bmap.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#include "xfs_rtalloc.h"
33#include "xfs_error.h"
34#include "xfs_itable.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070035#include "xfs_attr.h"
36#include "xfs_buf_item.h"
37#include "xfs_utils.h"
Christoph Hellwig739bfb22007-08-29 10:58:01 +100038#include "xfs_vnodeops.h"
Christoph Hellwigc4ed4242011-07-08 14:34:23 +020039#include "xfs_inode_item.h"
Christoph Hellwig0b1b2132009-12-14 23:14:59 +000040#include "xfs_trace.h"
Brian Foster27b52862012-11-06 09:50:38 -050041#include "xfs_icache.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070042
Randy Dunlap16f7e0f2006-01-11 12:17:46 -080043#include <linux/capability.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070044#include <linux/xattr.h>
45#include <linux/namei.h>
Christoph Hellwigef14f0c2009-06-10 17:07:47 +020046#include <linux/posix_acl.h>
Nathan Scott446ada42006-01-11 15:35:44 +110047#include <linux/security.h>
Eric Sandeenf35642e2008-11-28 14:23:35 +110048#include <linux/fiemap.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090049#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070050
Dave Chinner8d2a5e62012-03-07 04:50:19 +000051static int
52xfs_initxattrs(
53 struct inode *inode,
54 const struct xattr *xattr_array,
55 void *fs_info)
Mimi Zohar9d8f13b2011-06-06 15:29:25 -040056{
Dave Chinner8d2a5e62012-03-07 04:50:19 +000057 const struct xattr *xattr;
58 struct xfs_inode *ip = XFS_I(inode);
59 int error = 0;
Mimi Zohar9d8f13b2011-06-06 15:29:25 -040060
61 for (xattr = xattr_array; xattr->name != NULL; xattr++) {
62 error = xfs_attr_set(ip, xattr->name, xattr->value,
63 xattr->value_len, ATTR_SECURE);
64 if (error < 0)
65 break;
66 }
67 return error;
68}
69
David Chinner5d51eff2007-11-23 16:29:18 +110070/*
Nathan Scott446ada42006-01-11 15:35:44 +110071 * Hook in SELinux. This is not quite correct yet, what we really need
72 * here (as we do for default ACLs) is a mechanism by which creation of
73 * these attrs can be journalled at inode creation time (along with the
74 * inode, of course, such that log replay can't cause these to be lost).
75 */
Mimi Zohar9d8f13b2011-06-06 15:29:25 -040076
Nathan Scott446ada42006-01-11 15:35:44 +110077STATIC int
Nathan Scott416c6d52006-03-14 14:00:51 +110078xfs_init_security(
Christoph Hellwigaf048192008-03-06 13:46:43 +110079 struct inode *inode,
Eric Paris2a7dba32011-02-01 11:05:39 -050080 struct inode *dir,
81 const struct qstr *qstr)
Nathan Scott446ada42006-01-11 15:35:44 +110082{
Mimi Zohar9d8f13b2011-06-06 15:29:25 -040083 return security_inode_init_security(inode, dir, qstr,
84 &xfs_initxattrs, NULL);
Nathan Scott446ada42006-01-11 15:35:44 +110085}
86
Barry Naujok556b8b12008-04-10 12:22:07 +100087static void
88xfs_dentry_to_name(
89 struct xfs_name *namep,
90 struct dentry *dentry)
91{
92 namep->name = dentry->d_name.name;
93 namep->len = dentry->d_name.len;
94}
95
David Chinner7989cb82007-02-10 18:34:56 +110096STATIC void
Nathan Scott416c6d52006-03-14 14:00:51 +110097xfs_cleanup_inode(
Christoph Hellwig739bfb22007-08-29 10:58:01 +100098 struct inode *dir,
Christoph Hellwigaf048192008-03-06 13:46:43 +110099 struct inode *inode,
Christoph Hellwig8f112e32008-06-23 13:25:17 +1000100 struct dentry *dentry)
Yingping Lu3a69c7d2006-02-01 12:14:34 +1100101{
Barry Naujok556b8b12008-04-10 12:22:07 +1000102 struct xfs_name teardown;
Yingping Lu3a69c7d2006-02-01 12:14:34 +1100103
104 /* Oh, the horror.
Nathan Scott220b5282006-03-14 13:33:36 +1100105 * If we can't add the ACL or we fail in
Nathan Scott416c6d52006-03-14 14:00:51 +1100106 * xfs_init_security we must back out.
Yingping Lu3a69c7d2006-02-01 12:14:34 +1100107 * ENOSPC can hit here, among other things.
108 */
Barry Naujok556b8b12008-04-10 12:22:07 +1000109 xfs_dentry_to_name(&teardown, dentry);
Yingping Lu3a69c7d2006-02-01 12:14:34 +1100110
Christoph Hellwig8f112e32008-06-23 13:25:17 +1000111 xfs_remove(XFS_I(dir), &teardown, XFS_I(inode));
Christoph Hellwigaf048192008-03-06 13:46:43 +1100112 iput(inode);
Yingping Lu3a69c7d2006-02-01 12:14:34 +1100113}
114
Linus Torvalds1da177e2005-04-16 15:20:36 -0700115STATIC int
Nathan Scott416c6d52006-03-14 14:00:51 +1100116xfs_vn_mknod(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117 struct inode *dir,
118 struct dentry *dentry,
Al Viro1a67aaf2011-07-26 01:52:52 -0400119 umode_t mode,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700120 dev_t rdev)
121{
Christoph Hellwigdb0bb7b2008-03-06 13:44:35 +1100122 struct inode *inode;
Christoph Hellwig979ebab2008-03-06 13:46:05 +1100123 struct xfs_inode *ip = NULL;
Christoph Hellwigef14f0c2009-06-10 17:07:47 +0200124 struct posix_acl *default_acl = NULL;
Barry Naujok556b8b12008-04-10 12:22:07 +1000125 struct xfs_name name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700126 int error;
127
128 /*
129 * Irix uses Missed'em'V split, but doesn't want to see
130 * the upper 5 bits of (14bit) major.
131 */
Christoph Hellwig517b5e82009-02-09 08:38:02 +0100132 if (S_ISCHR(mode) || S_ISBLK(mode)) {
133 if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff))
134 return -EINVAL;
135 rdev = sysv_encode_dev(rdev);
136 } else {
137 rdev = 0;
138 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700139
Christoph Hellwigef14f0c2009-06-10 17:07:47 +0200140 if (IS_POSIXACL(dir)) {
141 default_acl = xfs_get_acl(dir, ACL_TYPE_DEFAULT);
142 if (IS_ERR(default_acl))
Al Viroc46a1312011-06-05 11:12:31 +0000143 return PTR_ERR(default_acl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700144
Christoph Hellwige83f1eb2009-06-12 11:19:11 -0400145 if (!default_acl)
146 mode &= ~current_umask();
Christoph Hellwigef14f0c2009-06-10 17:07:47 +0200147 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700148
Christoph Hellwig517b5e82009-02-09 08:38:02 +0100149 xfs_dentry_to_name(&name, dentry);
Christoph Hellwig6c77b0e2010-10-06 18:41:17 +0000150 error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip);
Christoph Hellwigdb0bb7b2008-03-06 13:44:35 +1100151 if (unlikely(error))
152 goto out_free_acl;
Nathan Scott446ada42006-01-11 15:35:44 +1100153
David Chinner01651642008-08-13 15:45:15 +1000154 inode = VFS_I(ip);
Christoph Hellwig979ebab2008-03-06 13:46:05 +1100155
Eric Paris2a7dba32011-02-01 11:05:39 -0500156 error = xfs_init_security(inode, dir, &dentry->d_name);
Christoph Hellwigdb0bb7b2008-03-06 13:44:35 +1100157 if (unlikely(error))
158 goto out_cleanup_inode;
159
160 if (default_acl) {
Christoph Hellwigef14f0c2009-06-10 17:07:47 +0200161 error = -xfs_inherit_acl(inode, default_acl);
Al Viro826cae22011-07-23 03:10:32 -0400162 default_acl = NULL;
Christoph Hellwigdb0bb7b2008-03-06 13:44:35 +1100163 if (unlikely(error))
164 goto out_cleanup_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165 }
166
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167
Christoph Hellwigdb0bb7b2008-03-06 13:44:35 +1100168 d_instantiate(dentry, inode);
Christoph Hellwigdb0bb7b2008-03-06 13:44:35 +1100169 return -error;
170
171 out_cleanup_inode:
Christoph Hellwig8f112e32008-06-23 13:25:17 +1000172 xfs_cleanup_inode(dir, inode, dentry);
Christoph Hellwigdb0bb7b2008-03-06 13:44:35 +1100173 out_free_acl:
Christoph Hellwigef14f0c2009-06-10 17:07:47 +0200174 posix_acl_release(default_acl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700175 return -error;
176}
177
178STATIC int
Nathan Scott416c6d52006-03-14 14:00:51 +1100179xfs_vn_create(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700180 struct inode *dir,
181 struct dentry *dentry,
Al Viro4acdaf22011-07-26 01:42:34 -0400182 umode_t mode,
Al Viroebfc3b42012-06-10 18:05:36 -0400183 bool flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700184{
Nathan Scott416c6d52006-03-14 14:00:51 +1100185 return xfs_vn_mknod(dir, dentry, mode, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700186}
187
188STATIC int
Nathan Scott416c6d52006-03-14 14:00:51 +1100189xfs_vn_mkdir(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700190 struct inode *dir,
191 struct dentry *dentry,
Al Viro18bb1db2011-07-26 01:41:39 -0400192 umode_t mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700193{
Nathan Scott416c6d52006-03-14 14:00:51 +1100194 return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195}
196
197STATIC struct dentry *
Nathan Scott416c6d52006-03-14 14:00:51 +1100198xfs_vn_lookup(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700199 struct inode *dir,
200 struct dentry *dentry,
Al Viro00cd8dd2012-06-10 17:13:09 -0400201 unsigned int flags)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700202{
Christoph Hellwigef1f5e72008-03-06 13:46:25 +1100203 struct xfs_inode *cip;
Barry Naujok556b8b12008-04-10 12:22:07 +1000204 struct xfs_name name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700205 int error;
206
207 if (dentry->d_name.len >= MAXNAMELEN)
208 return ERR_PTR(-ENAMETOOLONG);
209
Barry Naujok556b8b12008-04-10 12:22:07 +1000210 xfs_dentry_to_name(&name, dentry);
Barry Naujok384f3ce2008-05-21 16:58:22 +1000211 error = xfs_lookup(XFS_I(dir), &name, &cip, NULL);
Nathan Scott67fcaa72006-06-09 17:00:52 +1000212 if (unlikely(error)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700213 if (unlikely(error != ENOENT))
214 return ERR_PTR(-error);
215 d_add(dentry, NULL);
216 return NULL;
217 }
218
David Chinner01651642008-08-13 15:45:15 +1000219 return d_splice_alias(VFS_I(cip), dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220}
221
Barry Naujok384f3ce2008-05-21 16:58:22 +1000222STATIC struct dentry *
223xfs_vn_ci_lookup(
224 struct inode *dir,
225 struct dentry *dentry,
Al Viro00cd8dd2012-06-10 17:13:09 -0400226 unsigned int flags)
Barry Naujok384f3ce2008-05-21 16:58:22 +1000227{
228 struct xfs_inode *ip;
229 struct xfs_name xname;
230 struct xfs_name ci_name;
231 struct qstr dname;
232 int error;
233
234 if (dentry->d_name.len >= MAXNAMELEN)
235 return ERR_PTR(-ENAMETOOLONG);
236
237 xfs_dentry_to_name(&xname, dentry);
238 error = xfs_lookup(XFS_I(dir), &xname, &ip, &ci_name);
239 if (unlikely(error)) {
240 if (unlikely(error != ENOENT))
241 return ERR_PTR(-error);
Barry Naujok866d5dc2008-05-22 17:21:40 +1000242 /*
243 * call d_add(dentry, NULL) here when d_drop_negative_children
244 * is called in xfs_vn_mknod (ie. allow negative dentries
245 * with CI filesystems).
246 */
Barry Naujok384f3ce2008-05-21 16:58:22 +1000247 return NULL;
248 }
249
250 /* if exact match, just splice and exit */
251 if (!ci_name.name)
David Chinner01651642008-08-13 15:45:15 +1000252 return d_splice_alias(VFS_I(ip), dentry);
Barry Naujok384f3ce2008-05-21 16:58:22 +1000253
254 /* else case-insensitive match... */
255 dname.name = ci_name.name;
256 dname.len = ci_name.len;
Christoph Hellwige45b5902008-08-07 23:49:07 +0200257 dentry = d_add_ci(dentry, VFS_I(ip), &dname);
Barry Naujok384f3ce2008-05-21 16:58:22 +1000258 kmem_free(ci_name.name);
259 return dentry;
260}
261
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262STATIC int
Nathan Scott416c6d52006-03-14 14:00:51 +1100263xfs_vn_link(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264 struct dentry *old_dentry,
265 struct inode *dir,
266 struct dentry *dentry)
267{
Christoph Hellwigd9424b32008-12-03 12:20:27 +0100268 struct inode *inode = old_dentry->d_inode;
Barry Naujok556b8b12008-04-10 12:22:07 +1000269 struct xfs_name name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 int error;
271
Barry Naujok556b8b12008-04-10 12:22:07 +1000272 xfs_dentry_to_name(&name, dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700273
Barry Naujok556b8b12008-04-10 12:22:07 +1000274 error = xfs_link(XFS_I(dir), XFS_I(inode), &name);
Christoph Hellwigd9424b32008-12-03 12:20:27 +0100275 if (unlikely(error))
Christoph Hellwiga3da7892008-03-06 13:46:12 +1100276 return -error;
Christoph Hellwiga3da7892008-03-06 13:46:12 +1100277
Al Viro7de9c6ee2010-10-23 11:11:40 -0400278 ihold(inode);
Christoph Hellwiga3da7892008-03-06 13:46:12 +1100279 d_instantiate(dentry, inode);
280 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700281}
282
283STATIC int
Nathan Scott416c6d52006-03-14 14:00:51 +1100284xfs_vn_unlink(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700285 struct inode *dir,
286 struct dentry *dentry)
287{
Barry Naujok556b8b12008-04-10 12:22:07 +1000288 struct xfs_name name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700289 int error;
290
Barry Naujok556b8b12008-04-10 12:22:07 +1000291 xfs_dentry_to_name(&name, dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700292
Christoph Hellwige5700702008-06-23 13:25:25 +1000293 error = -xfs_remove(XFS_I(dir), &name, XFS_I(dentry->d_inode));
294 if (error)
295 return error;
296
297 /*
298 * With unlink, the VFS makes the dentry "negative": no inode,
299 * but still hashed. This is incompatible with case-insensitive
300 * mode, so invalidate (unhash) the dentry in CI-mode.
301 */
302 if (xfs_sb_version_hasasciici(&XFS_M(dir->i_sb)->m_sb))
303 d_invalidate(dentry);
304 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700305}
306
307STATIC int
Nathan Scott416c6d52006-03-14 14:00:51 +1100308xfs_vn_symlink(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700309 struct inode *dir,
310 struct dentry *dentry,
311 const char *symname)
312{
Christoph Hellwig3937be52008-03-06 13:46:19 +1100313 struct inode *inode;
314 struct xfs_inode *cip = NULL;
Barry Naujok556b8b12008-04-10 12:22:07 +1000315 struct xfs_name name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700316 int error;
Al Viro576b1d62011-07-26 02:50:15 -0400317 umode_t mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318
Christoph Hellwig3e5daf02007-10-11 18:09:12 +1000319 mode = S_IFLNK |
Al Viroce3b0f82009-03-29 19:08:22 -0400320 (irix_symlink_mode ? 0777 & ~current_umask() : S_IRWXUGO);
Barry Naujok556b8b12008-04-10 12:22:07 +1000321 xfs_dentry_to_name(&name, dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322
Christoph Hellwig6c77b0e2010-10-06 18:41:17 +0000323 error = xfs_symlink(XFS_I(dir), &name, symname, mode, &cip);
Christoph Hellwig3937be52008-03-06 13:46:19 +1100324 if (unlikely(error))
325 goto out;
326
David Chinner01651642008-08-13 15:45:15 +1000327 inode = VFS_I(cip);
Christoph Hellwig3937be52008-03-06 13:46:19 +1100328
Eric Paris2a7dba32011-02-01 11:05:39 -0500329 error = xfs_init_security(inode, dir, &dentry->d_name);
Christoph Hellwig3937be52008-03-06 13:46:19 +1100330 if (unlikely(error))
331 goto out_cleanup_inode;
332
333 d_instantiate(dentry, inode);
Christoph Hellwig3937be52008-03-06 13:46:19 +1100334 return 0;
335
336 out_cleanup_inode:
Christoph Hellwig8f112e32008-06-23 13:25:17 +1000337 xfs_cleanup_inode(dir, inode, dentry);
Christoph Hellwig3937be52008-03-06 13:46:19 +1100338 out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700339 return -error;
340}
341
342STATIC int
Nathan Scott416c6d52006-03-14 14:00:51 +1100343xfs_vn_rename(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700344 struct inode *odir,
345 struct dentry *odentry,
346 struct inode *ndir,
347 struct dentry *ndentry)
348{
349 struct inode *new_inode = ndentry->d_inode;
Barry Naujok556b8b12008-04-10 12:22:07 +1000350 struct xfs_name oname;
351 struct xfs_name nname;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700352
Barry Naujok556b8b12008-04-10 12:22:07 +1000353 xfs_dentry_to_name(&oname, odentry);
354 xfs_dentry_to_name(&nname, ndentry);
355
Christoph Hellwige5700702008-06-23 13:25:25 +1000356 return -xfs_rename(XFS_I(odir), &oname, XFS_I(odentry->d_inode),
Christoph Hellwigcfa853e2008-04-22 17:34:06 +1000357 XFS_I(ndir), &nname, new_inode ?
358 XFS_I(new_inode) : NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359}
360
361/*
362 * careful here - this function can get called recursively, so
363 * we need to be very careful about how much stack we use.
364 * uio is kmalloced for this reason...
365 */
Al Viro008b1502005-08-20 00:17:39 +0100366STATIC void *
Nathan Scott416c6d52006-03-14 14:00:51 +1100367xfs_vn_follow_link(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700368 struct dentry *dentry,
369 struct nameidata *nd)
370{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700371 char *link;
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000372 int error = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373
Panagiotis Issarisf52720c2006-09-27 01:49:39 -0700374 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000375 if (!link)
376 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700377
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000378 error = -xfs_readlink(XFS_I(dentry->d_inode), link);
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000379 if (unlikely(error))
380 goto out_kfree;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381
382 nd_set_link(nd, link);
Al Viro008b1502005-08-20 00:17:39 +0100383 return NULL;
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000384
385 out_kfree:
386 kfree(link);
387 out_err:
388 nd_set_link(nd, ERR_PTR(error));
389 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390}
391
Nathan Scottcde410a2005-09-05 11:47:01 +1000392STATIC void
Nathan Scott416c6d52006-03-14 14:00:51 +1100393xfs_vn_put_link(
Nathan Scottcde410a2005-09-05 11:47:01 +1000394 struct dentry *dentry,
395 struct nameidata *nd,
396 void *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700397{
Nathan Scottcde410a2005-09-05 11:47:01 +1000398 char *s = nd_get_link(nd);
399
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400 if (!IS_ERR(s))
401 kfree(s);
402}
403
Christoph Hellwig45767582008-02-05 12:13:24 +1100404STATIC int
Nathan Scott416c6d52006-03-14 14:00:51 +1100405xfs_vn_getattr(
Christoph Hellwigc43f4082007-10-11 17:46:39 +1000406 struct vfsmount *mnt,
407 struct dentry *dentry,
408 struct kstat *stat)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700409{
Christoph Hellwigc43f4082007-10-11 17:46:39 +1000410 struct inode *inode = dentry->d_inode;
411 struct xfs_inode *ip = XFS_I(inode);
412 struct xfs_mount *mp = ip->i_mount;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700413
Christoph Hellwigcca28fb2010-06-24 11:57:09 +1000414 trace_xfs_getattr(ip);
Christoph Hellwigc43f4082007-10-11 17:46:39 +1000415
416 if (XFS_FORCED_SHUTDOWN(mp))
Mitsuo Hayasakaed322012011-09-17 13:38:38 +0000417 return -XFS_ERROR(EIO);
Christoph Hellwigc43f4082007-10-11 17:46:39 +1000418
419 stat->size = XFS_ISIZE(ip);
420 stat->dev = inode->i_sb->s_dev;
421 stat->mode = ip->i_d.di_mode;
422 stat->nlink = ip->i_d.di_nlink;
423 stat->uid = ip->i_d.di_uid;
424 stat->gid = ip->i_d.di_gid;
425 stat->ino = ip->i_ino;
Christoph Hellwigc43f4082007-10-11 17:46:39 +1000426 stat->atime = inode->i_atime;
Christoph Hellwigf9581b12009-10-06 20:29:26 +0000427 stat->mtime = inode->i_mtime;
428 stat->ctime = inode->i_ctime;
Christoph Hellwigc43f4082007-10-11 17:46:39 +1000429 stat->blocks =
430 XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks);
431
432
433 switch (inode->i_mode & S_IFMT) {
434 case S_IFBLK:
435 case S_IFCHR:
436 stat->blksize = BLKDEV_IOSIZE;
437 stat->rdev = MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
438 sysv_minor(ip->i_df.if_u2.if_rdev));
439 break;
440 default:
Eric Sandeen71ddabb2007-11-23 16:29:42 +1100441 if (XFS_IS_REALTIME_INODE(ip)) {
Christoph Hellwigc43f4082007-10-11 17:46:39 +1000442 /*
443 * If the file blocks are being allocated from a
444 * realtime volume, then return the inode's realtime
445 * extent size or the realtime volume's extent size.
446 */
447 stat->blksize =
448 xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog;
449 } else
450 stat->blksize = xfs_preferred_iosize(mp);
451 stat->rdev = 0;
452 break;
Nathan Scott69e23b92006-09-28 11:01:22 +1000453 }
Christoph Hellwigc43f4082007-10-11 17:46:39 +1000454
455 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700456}
457
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200458int
459xfs_setattr_nonsize(
460 struct xfs_inode *ip,
461 struct iattr *iattr,
462 int flags)
463{
464 xfs_mount_t *mp = ip->i_mount;
465 struct inode *inode = VFS_I(ip);
466 int mask = iattr->ia_valid;
467 xfs_trans_t *tp;
468 int error;
469 uid_t uid = 0, iuid = 0;
470 gid_t gid = 0, igid = 0;
471 struct xfs_dquot *udqp = NULL, *gdqp = NULL;
472 struct xfs_dquot *olddquot1 = NULL, *olddquot2 = NULL;
473
474 trace_xfs_setattr(ip);
475
476 if (mp->m_flags & XFS_MOUNT_RDONLY)
477 return XFS_ERROR(EROFS);
478
479 if (XFS_FORCED_SHUTDOWN(mp))
480 return XFS_ERROR(EIO);
481
482 error = -inode_change_ok(inode, iattr);
483 if (error)
484 return XFS_ERROR(error);
485
486 ASSERT((mask & ATTR_SIZE) == 0);
487
488 /*
489 * If disk quotas is on, we make sure that the dquots do exist on disk,
490 * before we start any other transactions. Trying to do this later
491 * is messy. We don't care to take a readlock to look at the ids
492 * in inode here, because we can't hold it across the trans_reserve.
493 * If the IDs do change before we take the ilock, we're covered
494 * because the i_*dquot fields will get updated anyway.
495 */
496 if (XFS_IS_QUOTA_ON(mp) && (mask & (ATTR_UID|ATTR_GID))) {
497 uint qflags = 0;
498
499 if ((mask & ATTR_UID) && XFS_IS_UQUOTA_ON(mp)) {
500 uid = iattr->ia_uid;
501 qflags |= XFS_QMOPT_UQUOTA;
502 } else {
503 uid = ip->i_d.di_uid;
504 }
505 if ((mask & ATTR_GID) && XFS_IS_GQUOTA_ON(mp)) {
506 gid = iattr->ia_gid;
507 qflags |= XFS_QMOPT_GQUOTA;
508 } else {
509 gid = ip->i_d.di_gid;
510 }
511
512 /*
513 * We take a reference when we initialize udqp and gdqp,
514 * so it is important that we never blindly double trip on
515 * the same variable. See xfs_create() for an example.
516 */
517 ASSERT(udqp == NULL);
518 ASSERT(gdqp == NULL);
519 error = xfs_qm_vop_dqalloc(ip, uid, gid, xfs_get_projid(ip),
520 qflags, &udqp, &gdqp);
521 if (error)
522 return error;
523 }
524
525 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
526 error = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0);
527 if (error)
528 goto out_dqrele;
529
530 xfs_ilock(ip, XFS_ILOCK_EXCL);
531
532 /*
533 * Change file ownership. Must be the owner or privileged.
534 */
535 if (mask & (ATTR_UID|ATTR_GID)) {
536 /*
537 * These IDs could have changed since we last looked at them.
538 * But, we're assured that if the ownership did change
539 * while we didn't have the inode locked, inode's dquot(s)
540 * would have changed also.
541 */
542 iuid = ip->i_d.di_uid;
543 igid = ip->i_d.di_gid;
544 gid = (mask & ATTR_GID) ? iattr->ia_gid : igid;
545 uid = (mask & ATTR_UID) ? iattr->ia_uid : iuid;
546
547 /*
548 * Do a quota reservation only if uid/gid is actually
549 * going to change.
550 */
551 if (XFS_IS_QUOTA_RUNNING(mp) &&
552 ((XFS_IS_UQUOTA_ON(mp) && iuid != uid) ||
553 (XFS_IS_GQUOTA_ON(mp) && igid != gid))) {
554 ASSERT(tp);
555 error = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
556 capable(CAP_FOWNER) ?
557 XFS_QMOPT_FORCE_RES : 0);
558 if (error) /* out of quota */
559 goto out_trans_cancel;
560 }
561 }
562
Christoph Hellwigddc34152011-09-19 15:00:54 +0000563 xfs_trans_ijoin(tp, ip, 0);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200564
565 /*
566 * Change file ownership. Must be the owner or privileged.
567 */
568 if (mask & (ATTR_UID|ATTR_GID)) {
569 /*
570 * CAP_FSETID overrides the following restrictions:
571 *
572 * The set-user-ID and set-group-ID bits of a file will be
573 * cleared upon successful return from chown()
574 */
575 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
576 !capable(CAP_FSETID))
577 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
578
579 /*
580 * Change the ownerships and register quota modifications
581 * in the transaction.
582 */
583 if (iuid != uid) {
584 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_UQUOTA_ON(mp)) {
585 ASSERT(mask & ATTR_UID);
586 ASSERT(udqp);
587 olddquot1 = xfs_qm_vop_chown(tp, ip,
588 &ip->i_udquot, udqp);
589 }
590 ip->i_d.di_uid = uid;
591 inode->i_uid = uid;
592 }
593 if (igid != gid) {
594 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_GQUOTA_ON(mp)) {
595 ASSERT(!XFS_IS_PQUOTA_ON(mp));
596 ASSERT(mask & ATTR_GID);
597 ASSERT(gdqp);
598 olddquot2 = xfs_qm_vop_chown(tp, ip,
599 &ip->i_gdquot, gdqp);
600 }
601 ip->i_d.di_gid = gid;
602 inode->i_gid = gid;
603 }
604 }
605
606 /*
607 * Change file access modes.
608 */
609 if (mask & ATTR_MODE) {
610 umode_t mode = iattr->ia_mode;
611
612 if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
613 mode &= ~S_ISGID;
614
615 ip->i_d.di_mode &= S_IFMT;
616 ip->i_d.di_mode |= mode & ~S_IFMT;
617
618 inode->i_mode &= S_IFMT;
619 inode->i_mode |= mode & ~S_IFMT;
620 }
621
622 /*
623 * Change file access or modified times.
624 */
625 if (mask & ATTR_ATIME) {
626 inode->i_atime = iattr->ia_atime;
627 ip->i_d.di_atime.t_sec = iattr->ia_atime.tv_sec;
628 ip->i_d.di_atime.t_nsec = iattr->ia_atime.tv_nsec;
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200629 }
630 if (mask & ATTR_CTIME) {
631 inode->i_ctime = iattr->ia_ctime;
632 ip->i_d.di_ctime.t_sec = iattr->ia_ctime.tv_sec;
633 ip->i_d.di_ctime.t_nsec = iattr->ia_ctime.tv_nsec;
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200634 }
635 if (mask & ATTR_MTIME) {
636 inode->i_mtime = iattr->ia_mtime;
637 ip->i_d.di_mtime.t_sec = iattr->ia_mtime.tv_sec;
638 ip->i_d.di_mtime.t_nsec = iattr->ia_mtime.tv_nsec;
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200639 }
640
641 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
642
643 XFS_STATS_INC(xs_ig_attrchg);
644
645 if (mp->m_flags & XFS_MOUNT_WSYNC)
646 xfs_trans_set_sync(tp);
647 error = xfs_trans_commit(tp, 0);
648
649 xfs_iunlock(ip, XFS_ILOCK_EXCL);
650
651 /*
652 * Release any dquot(s) the inode had kept before chown.
653 */
654 xfs_qm_dqrele(olddquot1);
655 xfs_qm_dqrele(olddquot2);
656 xfs_qm_dqrele(udqp);
657 xfs_qm_dqrele(gdqp);
658
659 if (error)
660 return XFS_ERROR(error);
661
662 /*
663 * XXX(hch): Updating the ACL entries is not atomic vs the i_mode
664 * update. We could avoid this with linked transactions
665 * and passing down the transaction pointer all the way
666 * to attr_set. No previous user of the generic
667 * Posix ACL code seems to care about this issue either.
668 */
669 if ((mask & ATTR_MODE) && !(flags & XFS_ATTR_NOACL)) {
670 error = -xfs_acl_chmod(inode);
671 if (error)
672 return XFS_ERROR(error);
673 }
674
675 return 0;
676
677out_trans_cancel:
678 xfs_trans_cancel(tp, 0);
679 xfs_iunlock(ip, XFS_ILOCK_EXCL);
680out_dqrele:
681 xfs_qm_dqrele(udqp);
682 xfs_qm_dqrele(gdqp);
683 return error;
684}
685
686/*
687 * Truncate file. Must have write permission and not be a directory.
688 */
689int
690xfs_setattr_size(
691 struct xfs_inode *ip,
692 struct iattr *iattr,
693 int flags)
694{
695 struct xfs_mount *mp = ip->i_mount;
696 struct inode *inode = VFS_I(ip);
697 int mask = iattr->ia_valid;
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000698 xfs_off_t oldsize, newsize;
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200699 struct xfs_trans *tp;
700 int error;
Christoph Hellwigf38996f2012-03-27 10:34:48 -0400701 uint lock_flags = 0;
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200702 uint commit_flags = 0;
703
704 trace_xfs_setattr(ip);
705
706 if (mp->m_flags & XFS_MOUNT_RDONLY)
707 return XFS_ERROR(EROFS);
708
709 if (XFS_FORCED_SHUTDOWN(mp))
710 return XFS_ERROR(EIO);
711
712 error = -inode_change_ok(inode, iattr);
713 if (error)
714 return XFS_ERROR(error);
715
716 ASSERT(S_ISREG(ip->i_d.di_mode));
717 ASSERT((mask & (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_ATIME_SET|
718 ATTR_MTIME_SET|ATTR_KILL_SUID|ATTR_KILL_SGID|
719 ATTR_KILL_PRIV|ATTR_TIMES_SET)) == 0);
720
Christoph Hellwigf38996f2012-03-27 10:34:48 -0400721 if (!(flags & XFS_ATTR_NOLOCK)) {
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200722 lock_flags |= XFS_IOLOCK_EXCL;
Christoph Hellwigf38996f2012-03-27 10:34:48 -0400723 xfs_ilock(ip, lock_flags);
724 }
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200725
Christoph Hellwigce7ae1512011-12-18 20:00:11 +0000726 oldsize = inode->i_size;
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000727 newsize = iattr->ia_size;
728
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200729 /*
730 * Short circuit the truncate case for zero length files.
731 */
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000732 if (newsize == 0 && oldsize == 0 && ip->i_d.di_nextents == 0) {
Christoph Hellwig681b1202011-07-08 14:34:26 +0200733 if (!(mask & (ATTR_CTIME|ATTR_MTIME)))
734 goto out_unlock;
735
736 /*
737 * Use the regular setattr path to update the timestamps.
738 */
739 xfs_iunlock(ip, lock_flags);
740 iattr->ia_valid &= ~ATTR_SIZE;
741 return xfs_setattr_nonsize(ip, iattr, 0);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200742 }
743
744 /*
745 * Make sure that the dquots are attached to the inode.
746 */
Christoph Hellwigf38996f2012-03-27 10:34:48 -0400747 error = xfs_qm_dqattach(ip, 0);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200748 if (error)
749 goto out_unlock;
750
751 /*
752 * Now we can make the changes. Before we join the inode to the
753 * transaction, take care of the part of the truncation that must be
754 * done without the inode lock. This needs to be done before joining
755 * the inode to the transaction, because the inode cannot be unlocked
756 * once it is a part of the transaction.
757 */
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000758 if (newsize > oldsize) {
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200759 /*
760 * Do the first part of growing a file: zero any data in the
761 * last block that is beyond the old EOF. We need to do this
762 * before the inode is joined to the transaction to modify
763 * i_size.
764 */
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000765 error = xfs_zero_eof(ip, newsize, oldsize);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200766 if (error)
767 goto out_unlock;
768 }
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200769
770 /*
771 * We are going to log the inode size change in this transaction so
772 * any previous writes that are beyond the on disk EOF and the new
773 * EOF that have not been written out need to be written here. If we
774 * do not write the data out, we expose ourselves to the null files
775 * problem.
776 *
777 * Only flush from the on disk size to the smaller of the in memory
778 * file size or the new size as that's the range we really care about
779 * here and prevents waiting for other data not within the range we
780 * care about here.
781 */
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000782 if (oldsize != ip->i_d.di_size && newsize > ip->i_d.di_size) {
Dave Chinner4bc1ea62012-11-12 22:53:56 +1100783 error = -filemap_write_and_wait_range(VFS_I(ip)->i_mapping,
784 ip->i_d.di_size, newsize);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200785 if (error)
786 goto out_unlock;
787 }
788
789 /*
Christoph Hellwig4a06fd22011-08-23 08:28:13 +0000790 * Wait for all direct I/O to complete.
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200791 */
Christoph Hellwig4a06fd22011-08-23 08:28:13 +0000792 inode_dio_wait(inode);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200793
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000794 error = -block_truncate_page(inode->i_mapping, newsize, xfs_get_blocks);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200795 if (error)
796 goto out_unlock;
797
798 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_SIZE);
799 error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0,
800 XFS_TRANS_PERM_LOG_RES,
801 XFS_ITRUNCATE_LOG_COUNT);
802 if (error)
803 goto out_trans_cancel;
804
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000805 truncate_setsize(inode, newsize);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200806
807 commit_flags = XFS_TRANS_RELEASE_LOG_RES;
808 lock_flags |= XFS_ILOCK_EXCL;
809
810 xfs_ilock(ip, XFS_ILOCK_EXCL);
811
Christoph Hellwigddc34152011-09-19 15:00:54 +0000812 xfs_trans_ijoin(tp, ip, 0);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200813
814 /*
815 * Only change the c/mtime if we are changing the size or we are
816 * explicitly asked to change it. This handles the semantic difference
817 * between truncate() and ftruncate() as implemented in the VFS.
818 *
819 * The regular truncate() case without ATTR_CTIME and ATTR_MTIME is a
820 * special case where we need to update the times despite not having
821 * these flags set. For all other operations the VFS set these flags
822 * explicitly if it wants a timestamp update.
823 */
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000824 if (newsize != oldsize && (!(mask & (ATTR_CTIME | ATTR_MTIME)))) {
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200825 iattr->ia_ctime = iattr->ia_mtime =
826 current_fs_time(inode->i_sb);
827 mask |= ATTR_CTIME | ATTR_MTIME;
828 }
829
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000830 /*
831 * The first thing we do is set the size to new_size permanently on
832 * disk. This way we don't have to worry about anyone ever being able
833 * to look at the data being freed even in the face of a crash.
834 * What we're getting around here is the case where we free a block, it
835 * is allocated to another file, it is written to, and then we crash.
836 * If the new data gets written to the file but the log buffers
837 * containing the free and reallocation don't, then we'd end up with
838 * garbage in the blocks being freed. As long as we make the new size
839 * permanent before actually freeing any blocks it doesn't matter if
840 * they get written to.
841 */
842 ip->i_d.di_size = newsize;
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000843 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
844
845 if (newsize <= oldsize) {
846 error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, newsize);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200847 if (error)
848 goto out_trans_abort;
849
850 /*
851 * Truncated "down", so we're removing references to old data
852 * here - if we delay flushing for a long time, we expose
853 * ourselves unduly to the notorious NULL files problem. So,
854 * we mark this inode and flush it when the file is closed,
855 * and do not wait the usual (long) time for writeout.
856 */
857 xfs_iflags_set(ip, XFS_ITRUNCATED);
Brian Foster27b52862012-11-06 09:50:38 -0500858
859 /* A truncate down always removes post-EOF blocks. */
860 xfs_inode_clear_eofblocks_tag(ip);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200861 }
862
863 if (mask & ATTR_CTIME) {
864 inode->i_ctime = iattr->ia_ctime;
865 ip->i_d.di_ctime.t_sec = iattr->ia_ctime.tv_sec;
866 ip->i_d.di_ctime.t_nsec = iattr->ia_ctime.tv_nsec;
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200867 }
868 if (mask & ATTR_MTIME) {
869 inode->i_mtime = iattr->ia_mtime;
870 ip->i_d.di_mtime.t_sec = iattr->ia_mtime.tv_sec;
871 ip->i_d.di_mtime.t_nsec = iattr->ia_mtime.tv_nsec;
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200872 }
873
874 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
875
876 XFS_STATS_INC(xs_ig_attrchg);
877
878 if (mp->m_flags & XFS_MOUNT_WSYNC)
879 xfs_trans_set_sync(tp);
880
881 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
882out_unlock:
883 if (lock_flags)
884 xfs_iunlock(ip, lock_flags);
885 return error;
886
887out_trans_abort:
888 commit_flags |= XFS_TRANS_ABORT;
889out_trans_cancel:
890 xfs_trans_cancel(tp, commit_flags);
891 goto out_unlock;
892}
893
Linus Torvalds1da177e2005-04-16 15:20:36 -0700894STATIC int
Nathan Scott416c6d52006-03-14 14:00:51 +1100895xfs_vn_setattr(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700896 struct dentry *dentry,
Christoph Hellwig0f285c82008-07-18 17:13:28 +1000897 struct iattr *iattr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700898{
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200899 if (iattr->ia_valid & ATTR_SIZE)
900 return -xfs_setattr_size(XFS_I(dentry->d_inode), iattr, 0);
901 return -xfs_setattr_nonsize(XFS_I(dentry->d_inode), iattr, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700902}
903
Christoph Hellwig69ff2822012-06-06 17:01:28 -0400904STATIC int
905xfs_vn_update_time(
906 struct inode *inode,
907 struct timespec *now,
908 int flags)
909{
910 struct xfs_inode *ip = XFS_I(inode);
911 struct xfs_mount *mp = ip->i_mount;
912 struct xfs_trans *tp;
913 int error;
914
915 trace_xfs_update_time(ip);
916
917 tp = xfs_trans_alloc(mp, XFS_TRANS_FSYNC_TS);
918 error = xfs_trans_reserve(tp, 0, XFS_FSYNC_TS_LOG_RES(mp), 0, 0, 0);
919 if (error) {
920 xfs_trans_cancel(tp, 0);
921 return -error;
922 }
923
924 xfs_ilock(ip, XFS_ILOCK_EXCL);
925 if (flags & S_CTIME) {
926 inode->i_ctime = *now;
927 ip->i_d.di_ctime.t_sec = (__int32_t)now->tv_sec;
928 ip->i_d.di_ctime.t_nsec = (__int32_t)now->tv_nsec;
929 }
930 if (flags & S_MTIME) {
931 inode->i_mtime = *now;
932 ip->i_d.di_mtime.t_sec = (__int32_t)now->tv_sec;
933 ip->i_d.di_mtime.t_nsec = (__int32_t)now->tv_nsec;
934 }
935 if (flags & S_ATIME) {
936 inode->i_atime = *now;
937 ip->i_d.di_atime.t_sec = (__int32_t)now->tv_sec;
938 ip->i_d.di_atime.t_nsec = (__int32_t)now->tv_nsec;
939 }
940 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL);
941 xfs_trans_log_inode(tp, ip, XFS_ILOG_TIMESTAMP);
942 return -xfs_trans_commit(tp, 0);
943}
944
Eric Sandeenf35642e2008-11-28 14:23:35 +1100945#define XFS_FIEMAP_FLAGS (FIEMAP_FLAG_SYNC|FIEMAP_FLAG_XATTR)
946
947/*
948 * Call fiemap helper to fill in user data.
949 * Returns positive errors to xfs_getbmap.
950 */
951STATIC int
952xfs_fiemap_format(
953 void **arg,
954 struct getbmapx *bmv,
955 int *full)
956{
957 int error;
958 struct fiemap_extent_info *fieinfo = *arg;
959 u32 fiemap_flags = 0;
960 u64 logical, physical, length;
961
962 /* Do nothing for a hole */
963 if (bmv->bmv_block == -1LL)
964 return 0;
965
966 logical = BBTOB(bmv->bmv_offset);
967 physical = BBTOB(bmv->bmv_block);
968 length = BBTOB(bmv->bmv_length);
969
970 if (bmv->bmv_oflags & BMV_OF_PREALLOC)
971 fiemap_flags |= FIEMAP_EXTENT_UNWRITTEN;
972 else if (bmv->bmv_oflags & BMV_OF_DELALLOC) {
973 fiemap_flags |= FIEMAP_EXTENT_DELALLOC;
974 physical = 0; /* no block yet */
975 }
976 if (bmv->bmv_oflags & BMV_OF_LAST)
977 fiemap_flags |= FIEMAP_EXTENT_LAST;
978
979 error = fiemap_fill_next_extent(fieinfo, logical, physical,
980 length, fiemap_flags);
981 if (error > 0) {
982 error = 0;
983 *full = 1; /* user array now full */
984 }
985
986 return -error;
987}
988
989STATIC int
990xfs_vn_fiemap(
991 struct inode *inode,
992 struct fiemap_extent_info *fieinfo,
993 u64 start,
994 u64 length)
995{
996 xfs_inode_t *ip = XFS_I(inode);
997 struct getbmapx bm;
998 int error;
999
1000 error = fiemap_check_flags(fieinfo, XFS_FIEMAP_FLAGS);
1001 if (error)
1002 return error;
1003
1004 /* Set up bmap header for xfs internal routine */
1005 bm.bmv_offset = BTOBB(start);
1006 /* Special case for whole file */
1007 if (length == FIEMAP_MAX_OFFSET)
1008 bm.bmv_length = -1LL;
1009 else
1010 bm.bmv_length = BTOBB(length);
1011
Eric Sandeen97db39a2009-07-26 21:52:01 -05001012 /* We add one because in getbmap world count includes the header */
Tao Ma2d1ff3c2010-04-29 15:13:56 +10001013 bm.bmv_count = !fieinfo->fi_extents_max ? MAXEXTNUM :
1014 fieinfo->fi_extents_max + 1;
1015 bm.bmv_count = min_t(__s32, bm.bmv_count,
1016 (PAGE_SIZE * 16 / sizeof(struct getbmapx)));
Tao Ma9af25462010-08-30 02:44:03 +00001017 bm.bmv_iflags = BMV_IF_PREALLOC | BMV_IF_NO_HOLES;
Eric Sandeenf35642e2008-11-28 14:23:35 +11001018 if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR)
1019 bm.bmv_iflags |= BMV_IF_ATTRFORK;
1020 if (!(fieinfo->fi_flags & FIEMAP_FLAG_SYNC))
1021 bm.bmv_iflags |= BMV_IF_DELALLOC;
1022
1023 error = xfs_getbmap(ip, &bm, xfs_fiemap_format, fieinfo);
1024 if (error)
1025 return -error;
1026
1027 return 0;
1028}
1029
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001030static const struct inode_operations xfs_inode_operations = {
Christoph Hellwig4e34e712011-07-23 17:37:31 +02001031 .get_acl = xfs_get_acl,
Nathan Scott416c6d52006-03-14 14:00:51 +11001032 .getattr = xfs_vn_getattr,
1033 .setattr = xfs_vn_setattr,
Lachlan McIlroy0ec58512008-06-23 13:23:01 +10001034 .setxattr = generic_setxattr,
1035 .getxattr = generic_getxattr,
1036 .removexattr = generic_removexattr,
Nathan Scott416c6d52006-03-14 14:00:51 +11001037 .listxattr = xfs_vn_listxattr,
Eric Sandeenf35642e2008-11-28 14:23:35 +11001038 .fiemap = xfs_vn_fiemap,
Christoph Hellwig69ff2822012-06-06 17:01:28 -04001039 .update_time = xfs_vn_update_time,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001040};
1041
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001042static const struct inode_operations xfs_dir_inode_operations = {
Nathan Scott416c6d52006-03-14 14:00:51 +11001043 .create = xfs_vn_create,
1044 .lookup = xfs_vn_lookup,
1045 .link = xfs_vn_link,
1046 .unlink = xfs_vn_unlink,
1047 .symlink = xfs_vn_symlink,
1048 .mkdir = xfs_vn_mkdir,
Christoph Hellwig8f112e32008-06-23 13:25:17 +10001049 /*
1050 * Yes, XFS uses the same method for rmdir and unlink.
1051 *
1052 * There are some subtile differences deeper in the code,
1053 * but we use S_ISDIR to check for those.
1054 */
1055 .rmdir = xfs_vn_unlink,
Nathan Scott416c6d52006-03-14 14:00:51 +11001056 .mknod = xfs_vn_mknod,
1057 .rename = xfs_vn_rename,
Christoph Hellwig4e34e712011-07-23 17:37:31 +02001058 .get_acl = xfs_get_acl,
Nathan Scott416c6d52006-03-14 14:00:51 +11001059 .getattr = xfs_vn_getattr,
1060 .setattr = xfs_vn_setattr,
Lachlan McIlroy0ec58512008-06-23 13:23:01 +10001061 .setxattr = generic_setxattr,
1062 .getxattr = generic_getxattr,
1063 .removexattr = generic_removexattr,
Nathan Scott416c6d52006-03-14 14:00:51 +11001064 .listxattr = xfs_vn_listxattr,
Christoph Hellwig69ff2822012-06-06 17:01:28 -04001065 .update_time = xfs_vn_update_time,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001066};
1067
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001068static const struct inode_operations xfs_dir_ci_inode_operations = {
Barry Naujok384f3ce2008-05-21 16:58:22 +10001069 .create = xfs_vn_create,
1070 .lookup = xfs_vn_ci_lookup,
1071 .link = xfs_vn_link,
1072 .unlink = xfs_vn_unlink,
1073 .symlink = xfs_vn_symlink,
1074 .mkdir = xfs_vn_mkdir,
Christoph Hellwig8f112e32008-06-23 13:25:17 +10001075 /*
1076 * Yes, XFS uses the same method for rmdir and unlink.
1077 *
1078 * There are some subtile differences deeper in the code,
1079 * but we use S_ISDIR to check for those.
1080 */
1081 .rmdir = xfs_vn_unlink,
Barry Naujok384f3ce2008-05-21 16:58:22 +10001082 .mknod = xfs_vn_mknod,
1083 .rename = xfs_vn_rename,
Christoph Hellwig4e34e712011-07-23 17:37:31 +02001084 .get_acl = xfs_get_acl,
Barry Naujok384f3ce2008-05-21 16:58:22 +10001085 .getattr = xfs_vn_getattr,
1086 .setattr = xfs_vn_setattr,
Lachlan McIlroy0ec58512008-06-23 13:23:01 +10001087 .setxattr = generic_setxattr,
1088 .getxattr = generic_getxattr,
1089 .removexattr = generic_removexattr,
Barry Naujok384f3ce2008-05-21 16:58:22 +10001090 .listxattr = xfs_vn_listxattr,
Christoph Hellwig69ff2822012-06-06 17:01:28 -04001091 .update_time = xfs_vn_update_time,
Barry Naujok384f3ce2008-05-21 16:58:22 +10001092};
1093
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001094static const struct inode_operations xfs_symlink_inode_operations = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001095 .readlink = generic_readlink,
Nathan Scott416c6d52006-03-14 14:00:51 +11001096 .follow_link = xfs_vn_follow_link,
1097 .put_link = xfs_vn_put_link,
Christoph Hellwig4e34e712011-07-23 17:37:31 +02001098 .get_acl = xfs_get_acl,
Nathan Scott416c6d52006-03-14 14:00:51 +11001099 .getattr = xfs_vn_getattr,
1100 .setattr = xfs_vn_setattr,
Lachlan McIlroy0ec58512008-06-23 13:23:01 +10001101 .setxattr = generic_setxattr,
1102 .getxattr = generic_getxattr,
1103 .removexattr = generic_removexattr,
Nathan Scott416c6d52006-03-14 14:00:51 +11001104 .listxattr = xfs_vn_listxattr,
Christoph Hellwig69ff2822012-06-06 17:01:28 -04001105 .update_time = xfs_vn_update_time,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001106};
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001107
1108STATIC void
1109xfs_diflags_to_iflags(
1110 struct inode *inode,
1111 struct xfs_inode *ip)
1112{
1113 if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE)
1114 inode->i_flags |= S_IMMUTABLE;
1115 else
1116 inode->i_flags &= ~S_IMMUTABLE;
1117 if (ip->i_d.di_flags & XFS_DIFLAG_APPEND)
1118 inode->i_flags |= S_APPEND;
1119 else
1120 inode->i_flags &= ~S_APPEND;
1121 if (ip->i_d.di_flags & XFS_DIFLAG_SYNC)
1122 inode->i_flags |= S_SYNC;
1123 else
1124 inode->i_flags &= ~S_SYNC;
1125 if (ip->i_d.di_flags & XFS_DIFLAG_NOATIME)
1126 inode->i_flags |= S_NOATIME;
1127 else
1128 inode->i_flags &= ~S_NOATIME;
1129}
1130
1131/*
1132 * Initialize the Linux inode, set up the operation vectors and
1133 * unlock the inode.
1134 *
1135 * When reading existing inodes from disk this is called directly
1136 * from xfs_iget, when creating a new inode it is called from
1137 * xfs_ialloc after setting up the inode.
David Chinnerbf904242008-10-30 17:36:14 +11001138 *
1139 * We are always called with an uninitialised linux inode here.
1140 * We need to initialise the necessary fields and take a reference
1141 * on it.
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001142 */
1143void
1144xfs_setup_inode(
1145 struct xfs_inode *ip)
1146{
David Chinnerbf904242008-10-30 17:36:14 +11001147 struct inode *inode = &ip->i_vnode;
1148
1149 inode->i_ino = ip->i_ino;
Christoph Hellwigeaff8072009-12-17 14:25:01 +01001150 inode->i_state = I_NEW;
Christoph Hellwig646ec462010-10-23 07:15:32 -04001151
1152 inode_sb_list_add(inode);
Christoph Hellwigc6f6cd02010-11-06 11:43:08 +00001153 /* make the inode look hashed for the writeback code */
1154 hlist_add_fake(&inode->i_hash);
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001155
1156 inode->i_mode = ip->i_d.di_mode;
Miklos Szeredibfe86842011-10-28 14:13:29 +02001157 set_nlink(inode, ip->i_d.di_nlink);
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001158 inode->i_uid = ip->i_d.di_uid;
1159 inode->i_gid = ip->i_d.di_gid;
1160
1161 switch (inode->i_mode & S_IFMT) {
1162 case S_IFBLK:
1163 case S_IFCHR:
1164 inode->i_rdev =
1165 MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
1166 sysv_minor(ip->i_df.if_u2.if_rdev));
1167 break;
1168 default:
1169 inode->i_rdev = 0;
1170 break;
1171 }
1172
1173 inode->i_generation = ip->i_d.di_gen;
1174 i_size_write(inode, ip->i_d.di_size);
1175 inode->i_atime.tv_sec = ip->i_d.di_atime.t_sec;
1176 inode->i_atime.tv_nsec = ip->i_d.di_atime.t_nsec;
1177 inode->i_mtime.tv_sec = ip->i_d.di_mtime.t_sec;
1178 inode->i_mtime.tv_nsec = ip->i_d.di_mtime.t_nsec;
1179 inode->i_ctime.tv_sec = ip->i_d.di_ctime.t_sec;
1180 inode->i_ctime.tv_nsec = ip->i_d.di_ctime.t_nsec;
1181 xfs_diflags_to_iflags(inode, ip);
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001182
1183 switch (inode->i_mode & S_IFMT) {
1184 case S_IFREG:
1185 inode->i_op = &xfs_inode_operations;
1186 inode->i_fop = &xfs_file_operations;
1187 inode->i_mapping->a_ops = &xfs_address_space_operations;
1188 break;
1189 case S_IFDIR:
1190 if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb))
1191 inode->i_op = &xfs_dir_ci_inode_operations;
1192 else
1193 inode->i_op = &xfs_dir_inode_operations;
1194 inode->i_fop = &xfs_dir_file_operations;
1195 break;
1196 case S_IFLNK:
1197 inode->i_op = &xfs_symlink_inode_operations;
1198 if (!(ip->i_df.if_flags & XFS_IFINLINE))
1199 inode->i_mapping->a_ops = &xfs_address_space_operations;
1200 break;
1201 default:
1202 inode->i_op = &xfs_inode_operations;
1203 init_special_inode(inode, inode->i_mode, inode->i_rdev);
1204 break;
1205 }
1206
Christoph Hellwig510792e2011-07-26 15:07:29 +00001207 /*
1208 * If there is no attribute fork no ACL can exist on this inode,
1209 * and it can't have any file capabilities attached to it either.
1210 */
1211 if (!XFS_IFORK_Q(ip)) {
1212 inode_has_no_xattr(inode);
Christoph Hellwig6311b102011-07-23 17:36:50 +02001213 cache_no_acl(inode);
Christoph Hellwig510792e2011-07-26 15:07:29 +00001214 }
Christoph Hellwig6311b102011-07-23 17:36:50 +02001215
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001216 xfs_iflags_clear(ip, XFS_INEW);
1217 barrier();
1218
1219 unlock_new_inode(inode);
1220}