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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Nathan Scott7b718762005-11-02 14:58:39 +11002 * Copyright (c) 2000-2005 Silicon Graphics, Inc.
3 * All Rights Reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
Nathan Scott7b718762005-11-02 14:58:39 +11005 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * published by the Free Software Foundation.
8 *
Nathan Scott7b718762005-11-02 14:58:39 +11009 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 *
Nathan Scott7b718762005-11-02 14:58:39 +110014 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include "xfs.h"
19#include "xfs_fs.h"
Christoph Hellwigef14f0c2009-06-10 17:07:47 +020020#include "xfs_acl.h"
Nathan Scotta844f452005-11-02 14:38:42 +110021#include "xfs_bit.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include "xfs_log.h"
Nathan Scotta844f452005-11-02 14:38:42 +110023#include "xfs_inum.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include "xfs_trans.h"
25#include "xfs_sb.h"
26#include "xfs_ag.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include "xfs_alloc.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include "xfs_quota.h"
29#include "xfs_mount.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#include "xfs_bmap_btree.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070031#include "xfs_dinode.h"
32#include "xfs_inode.h"
33#include "xfs_bmap.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070034#include "xfs_rtalloc.h"
35#include "xfs_error.h"
36#include "xfs_itable.h"
37#include "xfs_rw.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070038#include "xfs_attr.h"
39#include "xfs_buf_item.h"
40#include "xfs_utils.h"
Christoph Hellwig739bfb22007-08-29 10:58:01 +100041#include "xfs_vnodeops.h"
Christoph Hellwigc4ed4242011-07-08 14:34:23 +020042#include "xfs_inode_item.h"
Christoph Hellwig0b1b2132009-12-14 23:14:59 +000043#include "xfs_trace.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070044
Randy Dunlap16f7e0f2006-01-11 12:17:46 -080045#include <linux/capability.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070046#include <linux/xattr.h>
47#include <linux/namei.h>
Christoph Hellwigef14f0c2009-06-10 17:07:47 +020048#include <linux/posix_acl.h>
Nathan Scott446ada42006-01-11 15:35:44 +110049#include <linux/security.h>
Eric Sandeenf35642e2008-11-28 14:23:35 +110050#include <linux/fiemap.h>
Tejun Heo5a0e3ad2010-03-24 17:04:11 +090051#include <linux/slab.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
Dave Chinner8d2a5e62012-03-07 04:50:19 +000053static int
54xfs_initxattrs(
55 struct inode *inode,
56 const struct xattr *xattr_array,
57 void *fs_info)
Mimi Zohar9d8f13b2011-06-06 15:29:25 -040058{
Dave Chinner8d2a5e62012-03-07 04:50:19 +000059 const struct xattr *xattr;
60 struct xfs_inode *ip = XFS_I(inode);
61 int error = 0;
Mimi Zohar9d8f13b2011-06-06 15:29:25 -040062
63 for (xattr = xattr_array; xattr->name != NULL; xattr++) {
64 error = xfs_attr_set(ip, xattr->name, xattr->value,
65 xattr->value_len, ATTR_SECURE);
66 if (error < 0)
67 break;
68 }
69 return error;
70}
71
David Chinner5d51eff2007-11-23 16:29:18 +110072/*
Nathan Scott446ada42006-01-11 15:35:44 +110073 * Hook in SELinux. This is not quite correct yet, what we really need
74 * here (as we do for default ACLs) is a mechanism by which creation of
75 * these attrs can be journalled at inode creation time (along with the
76 * inode, of course, such that log replay can't cause these to be lost).
77 */
Mimi Zohar9d8f13b2011-06-06 15:29:25 -040078
Nathan Scott446ada42006-01-11 15:35:44 +110079STATIC int
Nathan Scott416c6d52006-03-14 14:00:51 +110080xfs_init_security(
Christoph Hellwigaf048192008-03-06 13:46:43 +110081 struct inode *inode,
Eric Paris2a7dba32011-02-01 11:05:39 -050082 struct inode *dir,
83 const struct qstr *qstr)
Nathan Scott446ada42006-01-11 15:35:44 +110084{
Mimi Zohar9d8f13b2011-06-06 15:29:25 -040085 return security_inode_init_security(inode, dir, qstr,
86 &xfs_initxattrs, NULL);
Nathan Scott446ada42006-01-11 15:35:44 +110087}
88
Barry Naujok556b8b12008-04-10 12:22:07 +100089static void
90xfs_dentry_to_name(
91 struct xfs_name *namep,
92 struct dentry *dentry)
93{
94 namep->name = dentry->d_name.name;
95 namep->len = dentry->d_name.len;
96}
97
David Chinner7989cb82007-02-10 18:34:56 +110098STATIC void
Nathan Scott416c6d52006-03-14 14:00:51 +110099xfs_cleanup_inode(
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000100 struct inode *dir,
Christoph Hellwigaf048192008-03-06 13:46:43 +1100101 struct inode *inode,
Christoph Hellwig8f112e32008-06-23 13:25:17 +1000102 struct dentry *dentry)
Yingping Lu3a69c7d2006-02-01 12:14:34 +1100103{
Barry Naujok556b8b12008-04-10 12:22:07 +1000104 struct xfs_name teardown;
Yingping Lu3a69c7d2006-02-01 12:14:34 +1100105
106 /* Oh, the horror.
Nathan Scott220b5282006-03-14 13:33:36 +1100107 * If we can't add the ACL or we fail in
Nathan Scott416c6d52006-03-14 14:00:51 +1100108 * xfs_init_security we must back out.
Yingping Lu3a69c7d2006-02-01 12:14:34 +1100109 * ENOSPC can hit here, among other things.
110 */
Barry Naujok556b8b12008-04-10 12:22:07 +1000111 xfs_dentry_to_name(&teardown, dentry);
Yingping Lu3a69c7d2006-02-01 12:14:34 +1100112
Christoph Hellwig8f112e32008-06-23 13:25:17 +1000113 xfs_remove(XFS_I(dir), &teardown, XFS_I(inode));
Christoph Hellwigaf048192008-03-06 13:46:43 +1100114 iput(inode);
Yingping Lu3a69c7d2006-02-01 12:14:34 +1100115}
116
Linus Torvalds1da177e2005-04-16 15:20:36 -0700117STATIC int
Nathan Scott416c6d52006-03-14 14:00:51 +1100118xfs_vn_mknod(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700119 struct inode *dir,
120 struct dentry *dentry,
Al Viro1a67aaf2011-07-26 01:52:52 -0400121 umode_t mode,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700122 dev_t rdev)
123{
Christoph Hellwigdb0bb7b2008-03-06 13:44:35 +1100124 struct inode *inode;
Christoph Hellwig979ebab2008-03-06 13:46:05 +1100125 struct xfs_inode *ip = NULL;
Christoph Hellwigef14f0c2009-06-10 17:07:47 +0200126 struct posix_acl *default_acl = NULL;
Barry Naujok556b8b12008-04-10 12:22:07 +1000127 struct xfs_name name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700128 int error;
129
130 /*
131 * Irix uses Missed'em'V split, but doesn't want to see
132 * the upper 5 bits of (14bit) major.
133 */
Christoph Hellwig517b5e82009-02-09 08:38:02 +0100134 if (S_ISCHR(mode) || S_ISBLK(mode)) {
135 if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff))
136 return -EINVAL;
137 rdev = sysv_encode_dev(rdev);
138 } else {
139 rdev = 0;
140 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700141
Christoph Hellwigef14f0c2009-06-10 17:07:47 +0200142 if (IS_POSIXACL(dir)) {
143 default_acl = xfs_get_acl(dir, ACL_TYPE_DEFAULT);
144 if (IS_ERR(default_acl))
Al Viroc46a1312011-06-05 11:12:31 +0000145 return PTR_ERR(default_acl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700146
Christoph Hellwige83f1eb2009-06-12 11:19:11 -0400147 if (!default_acl)
148 mode &= ~current_umask();
Christoph Hellwigef14f0c2009-06-10 17:07:47 +0200149 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700150
Christoph Hellwig517b5e82009-02-09 08:38:02 +0100151 xfs_dentry_to_name(&name, dentry);
Christoph Hellwig6c77b0e2010-10-06 18:41:17 +0000152 error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip);
Christoph Hellwigdb0bb7b2008-03-06 13:44:35 +1100153 if (unlikely(error))
154 goto out_free_acl;
Nathan Scott446ada42006-01-11 15:35:44 +1100155
David Chinner01651642008-08-13 15:45:15 +1000156 inode = VFS_I(ip);
Christoph Hellwig979ebab2008-03-06 13:46:05 +1100157
Eric Paris2a7dba32011-02-01 11:05:39 -0500158 error = xfs_init_security(inode, dir, &dentry->d_name);
Christoph Hellwigdb0bb7b2008-03-06 13:44:35 +1100159 if (unlikely(error))
160 goto out_cleanup_inode;
161
162 if (default_acl) {
Christoph Hellwigef14f0c2009-06-10 17:07:47 +0200163 error = -xfs_inherit_acl(inode, default_acl);
Al Viro826cae22011-07-23 03:10:32 -0400164 default_acl = NULL;
Christoph Hellwigdb0bb7b2008-03-06 13:44:35 +1100165 if (unlikely(error))
166 goto out_cleanup_inode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700167 }
168
Linus Torvalds1da177e2005-04-16 15:20:36 -0700169
Christoph Hellwigdb0bb7b2008-03-06 13:44:35 +1100170 d_instantiate(dentry, inode);
Christoph Hellwigdb0bb7b2008-03-06 13:44:35 +1100171 return -error;
172
173 out_cleanup_inode:
Christoph Hellwig8f112e32008-06-23 13:25:17 +1000174 xfs_cleanup_inode(dir, inode, dentry);
Christoph Hellwigdb0bb7b2008-03-06 13:44:35 +1100175 out_free_acl:
Christoph Hellwigef14f0c2009-06-10 17:07:47 +0200176 posix_acl_release(default_acl);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700177 return -error;
178}
179
180STATIC int
Nathan Scott416c6d52006-03-14 14:00:51 +1100181xfs_vn_create(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700182 struct inode *dir,
183 struct dentry *dentry,
Al Viro4acdaf22011-07-26 01:42:34 -0400184 umode_t mode,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700185 struct nameidata *nd)
186{
Nathan Scott416c6d52006-03-14 14:00:51 +1100187 return xfs_vn_mknod(dir, dentry, mode, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700188}
189
190STATIC int
Nathan Scott416c6d52006-03-14 14:00:51 +1100191xfs_vn_mkdir(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700192 struct inode *dir,
193 struct dentry *dentry,
Al Viro18bb1db2011-07-26 01:41:39 -0400194 umode_t mode)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700195{
Nathan Scott416c6d52006-03-14 14:00:51 +1100196 return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700197}
198
199STATIC struct dentry *
Nathan Scott416c6d52006-03-14 14:00:51 +1100200xfs_vn_lookup(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700201 struct inode *dir,
202 struct dentry *dentry,
203 struct nameidata *nd)
204{
Christoph Hellwigef1f5e72008-03-06 13:46:25 +1100205 struct xfs_inode *cip;
Barry Naujok556b8b12008-04-10 12:22:07 +1000206 struct xfs_name name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700207 int error;
208
209 if (dentry->d_name.len >= MAXNAMELEN)
210 return ERR_PTR(-ENAMETOOLONG);
211
Barry Naujok556b8b12008-04-10 12:22:07 +1000212 xfs_dentry_to_name(&name, dentry);
Barry Naujok384f3ce2008-05-21 16:58:22 +1000213 error = xfs_lookup(XFS_I(dir), &name, &cip, NULL);
Nathan Scott67fcaa72006-06-09 17:00:52 +1000214 if (unlikely(error)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700215 if (unlikely(error != ENOENT))
216 return ERR_PTR(-error);
217 d_add(dentry, NULL);
218 return NULL;
219 }
220
David Chinner01651642008-08-13 15:45:15 +1000221 return d_splice_alias(VFS_I(cip), dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700222}
223
Barry Naujok384f3ce2008-05-21 16:58:22 +1000224STATIC struct dentry *
225xfs_vn_ci_lookup(
226 struct inode *dir,
227 struct dentry *dentry,
228 struct nameidata *nd)
229{
230 struct xfs_inode *ip;
231 struct xfs_name xname;
232 struct xfs_name ci_name;
233 struct qstr dname;
234 int error;
235
236 if (dentry->d_name.len >= MAXNAMELEN)
237 return ERR_PTR(-ENAMETOOLONG);
238
239 xfs_dentry_to_name(&xname, dentry);
240 error = xfs_lookup(XFS_I(dir), &xname, &ip, &ci_name);
241 if (unlikely(error)) {
242 if (unlikely(error != ENOENT))
243 return ERR_PTR(-error);
Barry Naujok866d5dc2008-05-22 17:21:40 +1000244 /*
245 * call d_add(dentry, NULL) here when d_drop_negative_children
246 * is called in xfs_vn_mknod (ie. allow negative dentries
247 * with CI filesystems).
248 */
Barry Naujok384f3ce2008-05-21 16:58:22 +1000249 return NULL;
250 }
251
252 /* if exact match, just splice and exit */
253 if (!ci_name.name)
David Chinner01651642008-08-13 15:45:15 +1000254 return d_splice_alias(VFS_I(ip), dentry);
Barry Naujok384f3ce2008-05-21 16:58:22 +1000255
256 /* else case-insensitive match... */
257 dname.name = ci_name.name;
258 dname.len = ci_name.len;
Christoph Hellwige45b5902008-08-07 23:49:07 +0200259 dentry = d_add_ci(dentry, VFS_I(ip), &dname);
Barry Naujok384f3ce2008-05-21 16:58:22 +1000260 kmem_free(ci_name.name);
261 return dentry;
262}
263
Linus Torvalds1da177e2005-04-16 15:20:36 -0700264STATIC int
Nathan Scott416c6d52006-03-14 14:00:51 +1100265xfs_vn_link(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700266 struct dentry *old_dentry,
267 struct inode *dir,
268 struct dentry *dentry)
269{
Christoph Hellwigd9424b32008-12-03 12:20:27 +0100270 struct inode *inode = old_dentry->d_inode;
Barry Naujok556b8b12008-04-10 12:22:07 +1000271 struct xfs_name name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700272 int error;
273
Barry Naujok556b8b12008-04-10 12:22:07 +1000274 xfs_dentry_to_name(&name, dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700275
Barry Naujok556b8b12008-04-10 12:22:07 +1000276 error = xfs_link(XFS_I(dir), XFS_I(inode), &name);
Christoph Hellwigd9424b32008-12-03 12:20:27 +0100277 if (unlikely(error))
Christoph Hellwiga3da7892008-03-06 13:46:12 +1100278 return -error;
Christoph Hellwiga3da7892008-03-06 13:46:12 +1100279
Al Viro7de9c6e2010-10-23 11:11:40 -0400280 ihold(inode);
Christoph Hellwiga3da7892008-03-06 13:46:12 +1100281 d_instantiate(dentry, inode);
282 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700283}
284
285STATIC int
Nathan Scott416c6d52006-03-14 14:00:51 +1100286xfs_vn_unlink(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700287 struct inode *dir,
288 struct dentry *dentry)
289{
Barry Naujok556b8b12008-04-10 12:22:07 +1000290 struct xfs_name name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700291 int error;
292
Barry Naujok556b8b12008-04-10 12:22:07 +1000293 xfs_dentry_to_name(&name, dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700294
Christoph Hellwige5700702008-06-23 13:25:25 +1000295 error = -xfs_remove(XFS_I(dir), &name, XFS_I(dentry->d_inode));
296 if (error)
297 return error;
298
299 /*
300 * With unlink, the VFS makes the dentry "negative": no inode,
301 * but still hashed. This is incompatible with case-insensitive
302 * mode, so invalidate (unhash) the dentry in CI-mode.
303 */
304 if (xfs_sb_version_hasasciici(&XFS_M(dir->i_sb)->m_sb))
305 d_invalidate(dentry);
306 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700307}
308
309STATIC int
Nathan Scott416c6d52006-03-14 14:00:51 +1100310xfs_vn_symlink(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700311 struct inode *dir,
312 struct dentry *dentry,
313 const char *symname)
314{
Christoph Hellwig3937be52008-03-06 13:46:19 +1100315 struct inode *inode;
316 struct xfs_inode *cip = NULL;
Barry Naujok556b8b12008-04-10 12:22:07 +1000317 struct xfs_name name;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700318 int error;
Al Viro576b1d62011-07-26 02:50:15 -0400319 umode_t mode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700320
Christoph Hellwig3e5daf02007-10-11 18:09:12 +1000321 mode = S_IFLNK |
Al Viroce3b0f82009-03-29 19:08:22 -0400322 (irix_symlink_mode ? 0777 & ~current_umask() : S_IRWXUGO);
Barry Naujok556b8b12008-04-10 12:22:07 +1000323 xfs_dentry_to_name(&name, dentry);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700324
Christoph Hellwig6c77b0e2010-10-06 18:41:17 +0000325 error = xfs_symlink(XFS_I(dir), &name, symname, mode, &cip);
Christoph Hellwig3937be52008-03-06 13:46:19 +1100326 if (unlikely(error))
327 goto out;
328
David Chinner01651642008-08-13 15:45:15 +1000329 inode = VFS_I(cip);
Christoph Hellwig3937be52008-03-06 13:46:19 +1100330
Eric Paris2a7dba32011-02-01 11:05:39 -0500331 error = xfs_init_security(inode, dir, &dentry->d_name);
Christoph Hellwig3937be52008-03-06 13:46:19 +1100332 if (unlikely(error))
333 goto out_cleanup_inode;
334
335 d_instantiate(dentry, inode);
Christoph Hellwig3937be52008-03-06 13:46:19 +1100336 return 0;
337
338 out_cleanup_inode:
Christoph Hellwig8f112e32008-06-23 13:25:17 +1000339 xfs_cleanup_inode(dir, inode, dentry);
Christoph Hellwig3937be52008-03-06 13:46:19 +1100340 out:
Linus Torvalds1da177e2005-04-16 15:20:36 -0700341 return -error;
342}
343
344STATIC int
Nathan Scott416c6d52006-03-14 14:00:51 +1100345xfs_vn_rename(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700346 struct inode *odir,
347 struct dentry *odentry,
348 struct inode *ndir,
349 struct dentry *ndentry)
350{
351 struct inode *new_inode = ndentry->d_inode;
Barry Naujok556b8b12008-04-10 12:22:07 +1000352 struct xfs_name oname;
353 struct xfs_name nname;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700354
Barry Naujok556b8b12008-04-10 12:22:07 +1000355 xfs_dentry_to_name(&oname, odentry);
356 xfs_dentry_to_name(&nname, ndentry);
357
Christoph Hellwige5700702008-06-23 13:25:25 +1000358 return -xfs_rename(XFS_I(odir), &oname, XFS_I(odentry->d_inode),
Christoph Hellwigcfa853e2008-04-22 17:34:06 +1000359 XFS_I(ndir), &nname, new_inode ?
360 XFS_I(new_inode) : NULL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700361}
362
363/*
364 * careful here - this function can get called recursively, so
365 * we need to be very careful about how much stack we use.
366 * uio is kmalloced for this reason...
367 */
Al Viro008b1502005-08-20 00:17:39 +0100368STATIC void *
Nathan Scott416c6d52006-03-14 14:00:51 +1100369xfs_vn_follow_link(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700370 struct dentry *dentry,
371 struct nameidata *nd)
372{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700373 char *link;
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000374 int error = -ENOMEM;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700375
Panagiotis Issarisf52720c2006-09-27 01:49:39 -0700376 link = kmalloc(MAXPATHLEN+1, GFP_KERNEL);
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000377 if (!link)
378 goto out_err;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700379
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000380 error = -xfs_readlink(XFS_I(dentry->d_inode), link);
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000381 if (unlikely(error))
382 goto out_kfree;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700383
384 nd_set_link(nd, link);
Al Viro008b1502005-08-20 00:17:39 +0100385 return NULL;
Christoph Hellwig804c83c2007-08-28 13:59:03 +1000386
387 out_kfree:
388 kfree(link);
389 out_err:
390 nd_set_link(nd, ERR_PTR(error));
391 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700392}
393
Nathan Scottcde410a2005-09-05 11:47:01 +1000394STATIC void
Nathan Scott416c6d52006-03-14 14:00:51 +1100395xfs_vn_put_link(
Nathan Scottcde410a2005-09-05 11:47:01 +1000396 struct dentry *dentry,
397 struct nameidata *nd,
398 void *p)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700399{
Nathan Scottcde410a2005-09-05 11:47:01 +1000400 char *s = nd_get_link(nd);
401
Linus Torvalds1da177e2005-04-16 15:20:36 -0700402 if (!IS_ERR(s))
403 kfree(s);
404}
405
Christoph Hellwig45767582008-02-05 12:13:24 +1100406STATIC int
Nathan Scott416c6d52006-03-14 14:00:51 +1100407xfs_vn_getattr(
Christoph Hellwigc43f4082007-10-11 17:46:39 +1000408 struct vfsmount *mnt,
409 struct dentry *dentry,
410 struct kstat *stat)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700411{
Christoph Hellwigc43f4082007-10-11 17:46:39 +1000412 struct inode *inode = dentry->d_inode;
413 struct xfs_inode *ip = XFS_I(inode);
414 struct xfs_mount *mp = ip->i_mount;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700415
Christoph Hellwigcca28fb2010-06-24 11:57:09 +1000416 trace_xfs_getattr(ip);
Christoph Hellwigc43f4082007-10-11 17:46:39 +1000417
418 if (XFS_FORCED_SHUTDOWN(mp))
Mitsuo Hayasakaed322012011-09-17 13:38:38 +0000419 return -XFS_ERROR(EIO);
Christoph Hellwigc43f4082007-10-11 17:46:39 +1000420
421 stat->size = XFS_ISIZE(ip);
422 stat->dev = inode->i_sb->s_dev;
423 stat->mode = ip->i_d.di_mode;
424 stat->nlink = ip->i_d.di_nlink;
425 stat->uid = ip->i_d.di_uid;
426 stat->gid = ip->i_d.di_gid;
427 stat->ino = ip->i_ino;
Christoph Hellwigc43f4082007-10-11 17:46:39 +1000428 stat->atime = inode->i_atime;
Christoph Hellwigf9581b12009-10-06 20:29:26 +0000429 stat->mtime = inode->i_mtime;
430 stat->ctime = inode->i_ctime;
Christoph Hellwigc43f4082007-10-11 17:46:39 +1000431 stat->blocks =
432 XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks);
433
434
435 switch (inode->i_mode & S_IFMT) {
436 case S_IFBLK:
437 case S_IFCHR:
438 stat->blksize = BLKDEV_IOSIZE;
439 stat->rdev = MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
440 sysv_minor(ip->i_df.if_u2.if_rdev));
441 break;
442 default:
Eric Sandeen71ddabb2007-11-23 16:29:42 +1100443 if (XFS_IS_REALTIME_INODE(ip)) {
Christoph Hellwigc43f4082007-10-11 17:46:39 +1000444 /*
445 * If the file blocks are being allocated from a
446 * realtime volume, then return the inode's realtime
447 * extent size or the realtime volume's extent size.
448 */
449 stat->blksize =
450 xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog;
451 } else
452 stat->blksize = xfs_preferred_iosize(mp);
453 stat->rdev = 0;
454 break;
Nathan Scott69e23b92006-09-28 11:01:22 +1000455 }
Christoph Hellwigc43f4082007-10-11 17:46:39 +1000456
457 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700458}
459
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200460int
461xfs_setattr_nonsize(
462 struct xfs_inode *ip,
463 struct iattr *iattr,
464 int flags)
465{
466 xfs_mount_t *mp = ip->i_mount;
467 struct inode *inode = VFS_I(ip);
468 int mask = iattr->ia_valid;
469 xfs_trans_t *tp;
470 int error;
471 uid_t uid = 0, iuid = 0;
472 gid_t gid = 0, igid = 0;
473 struct xfs_dquot *udqp = NULL, *gdqp = NULL;
474 struct xfs_dquot *olddquot1 = NULL, *olddquot2 = NULL;
475
476 trace_xfs_setattr(ip);
477
478 if (mp->m_flags & XFS_MOUNT_RDONLY)
479 return XFS_ERROR(EROFS);
480
481 if (XFS_FORCED_SHUTDOWN(mp))
482 return XFS_ERROR(EIO);
483
484 error = -inode_change_ok(inode, iattr);
485 if (error)
486 return XFS_ERROR(error);
487
488 ASSERT((mask & ATTR_SIZE) == 0);
489
490 /*
491 * If disk quotas is on, we make sure that the dquots do exist on disk,
492 * before we start any other transactions. Trying to do this later
493 * is messy. We don't care to take a readlock to look at the ids
494 * in inode here, because we can't hold it across the trans_reserve.
495 * If the IDs do change before we take the ilock, we're covered
496 * because the i_*dquot fields will get updated anyway.
497 */
498 if (XFS_IS_QUOTA_ON(mp) && (mask & (ATTR_UID|ATTR_GID))) {
499 uint qflags = 0;
500
501 if ((mask & ATTR_UID) && XFS_IS_UQUOTA_ON(mp)) {
502 uid = iattr->ia_uid;
503 qflags |= XFS_QMOPT_UQUOTA;
504 } else {
505 uid = ip->i_d.di_uid;
506 }
507 if ((mask & ATTR_GID) && XFS_IS_GQUOTA_ON(mp)) {
508 gid = iattr->ia_gid;
509 qflags |= XFS_QMOPT_GQUOTA;
510 } else {
511 gid = ip->i_d.di_gid;
512 }
513
514 /*
515 * We take a reference when we initialize udqp and gdqp,
516 * so it is important that we never blindly double trip on
517 * the same variable. See xfs_create() for an example.
518 */
519 ASSERT(udqp == NULL);
520 ASSERT(gdqp == NULL);
521 error = xfs_qm_vop_dqalloc(ip, uid, gid, xfs_get_projid(ip),
522 qflags, &udqp, &gdqp);
523 if (error)
524 return error;
525 }
526
527 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE);
528 error = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0);
529 if (error)
530 goto out_dqrele;
531
532 xfs_ilock(ip, XFS_ILOCK_EXCL);
533
534 /*
535 * Change file ownership. Must be the owner or privileged.
536 */
537 if (mask & (ATTR_UID|ATTR_GID)) {
538 /*
539 * These IDs could have changed since we last looked at them.
540 * But, we're assured that if the ownership did change
541 * while we didn't have the inode locked, inode's dquot(s)
542 * would have changed also.
543 */
544 iuid = ip->i_d.di_uid;
545 igid = ip->i_d.di_gid;
546 gid = (mask & ATTR_GID) ? iattr->ia_gid : igid;
547 uid = (mask & ATTR_UID) ? iattr->ia_uid : iuid;
548
549 /*
550 * Do a quota reservation only if uid/gid is actually
551 * going to change.
552 */
553 if (XFS_IS_QUOTA_RUNNING(mp) &&
554 ((XFS_IS_UQUOTA_ON(mp) && iuid != uid) ||
555 (XFS_IS_GQUOTA_ON(mp) && igid != gid))) {
556 ASSERT(tp);
557 error = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp,
558 capable(CAP_FOWNER) ?
559 XFS_QMOPT_FORCE_RES : 0);
560 if (error) /* out of quota */
561 goto out_trans_cancel;
562 }
563 }
564
Christoph Hellwigddc34152011-09-19 15:00:54 +0000565 xfs_trans_ijoin(tp, ip, 0);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200566
567 /*
568 * Change file ownership. Must be the owner or privileged.
569 */
570 if (mask & (ATTR_UID|ATTR_GID)) {
571 /*
572 * CAP_FSETID overrides the following restrictions:
573 *
574 * The set-user-ID and set-group-ID bits of a file will be
575 * cleared upon successful return from chown()
576 */
577 if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) &&
578 !capable(CAP_FSETID))
579 ip->i_d.di_mode &= ~(S_ISUID|S_ISGID);
580
581 /*
582 * Change the ownerships and register quota modifications
583 * in the transaction.
584 */
585 if (iuid != uid) {
586 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_UQUOTA_ON(mp)) {
587 ASSERT(mask & ATTR_UID);
588 ASSERT(udqp);
589 olddquot1 = xfs_qm_vop_chown(tp, ip,
590 &ip->i_udquot, udqp);
591 }
592 ip->i_d.di_uid = uid;
593 inode->i_uid = uid;
594 }
595 if (igid != gid) {
596 if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_GQUOTA_ON(mp)) {
597 ASSERT(!XFS_IS_PQUOTA_ON(mp));
598 ASSERT(mask & ATTR_GID);
599 ASSERT(gdqp);
600 olddquot2 = xfs_qm_vop_chown(tp, ip,
601 &ip->i_gdquot, gdqp);
602 }
603 ip->i_d.di_gid = gid;
604 inode->i_gid = gid;
605 }
606 }
607
608 /*
609 * Change file access modes.
610 */
611 if (mask & ATTR_MODE) {
612 umode_t mode = iattr->ia_mode;
613
614 if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
615 mode &= ~S_ISGID;
616
617 ip->i_d.di_mode &= S_IFMT;
618 ip->i_d.di_mode |= mode & ~S_IFMT;
619
620 inode->i_mode &= S_IFMT;
621 inode->i_mode |= mode & ~S_IFMT;
622 }
623
624 /*
625 * Change file access or modified times.
626 */
627 if (mask & ATTR_ATIME) {
628 inode->i_atime = iattr->ia_atime;
629 ip->i_d.di_atime.t_sec = iattr->ia_atime.tv_sec;
630 ip->i_d.di_atime.t_nsec = iattr->ia_atime.tv_nsec;
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200631 }
632 if (mask & ATTR_CTIME) {
633 inode->i_ctime = iattr->ia_ctime;
634 ip->i_d.di_ctime.t_sec = iattr->ia_ctime.tv_sec;
635 ip->i_d.di_ctime.t_nsec = iattr->ia_ctime.tv_nsec;
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200636 }
637 if (mask & ATTR_MTIME) {
638 inode->i_mtime = iattr->ia_mtime;
639 ip->i_d.di_mtime.t_sec = iattr->ia_mtime.tv_sec;
640 ip->i_d.di_mtime.t_nsec = iattr->ia_mtime.tv_nsec;
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200641 }
642
643 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
644
645 XFS_STATS_INC(xs_ig_attrchg);
646
647 if (mp->m_flags & XFS_MOUNT_WSYNC)
648 xfs_trans_set_sync(tp);
649 error = xfs_trans_commit(tp, 0);
650
651 xfs_iunlock(ip, XFS_ILOCK_EXCL);
652
653 /*
654 * Release any dquot(s) the inode had kept before chown.
655 */
656 xfs_qm_dqrele(olddquot1);
657 xfs_qm_dqrele(olddquot2);
658 xfs_qm_dqrele(udqp);
659 xfs_qm_dqrele(gdqp);
660
661 if (error)
662 return XFS_ERROR(error);
663
664 /*
665 * XXX(hch): Updating the ACL entries is not atomic vs the i_mode
666 * update. We could avoid this with linked transactions
667 * and passing down the transaction pointer all the way
668 * to attr_set. No previous user of the generic
669 * Posix ACL code seems to care about this issue either.
670 */
671 if ((mask & ATTR_MODE) && !(flags & XFS_ATTR_NOACL)) {
672 error = -xfs_acl_chmod(inode);
673 if (error)
674 return XFS_ERROR(error);
675 }
676
677 return 0;
678
679out_trans_cancel:
680 xfs_trans_cancel(tp, 0);
681 xfs_iunlock(ip, XFS_ILOCK_EXCL);
682out_dqrele:
683 xfs_qm_dqrele(udqp);
684 xfs_qm_dqrele(gdqp);
685 return error;
686}
687
688/*
689 * Truncate file. Must have write permission and not be a directory.
690 */
691int
692xfs_setattr_size(
693 struct xfs_inode *ip,
694 struct iattr *iattr,
695 int flags)
696{
697 struct xfs_mount *mp = ip->i_mount;
698 struct inode *inode = VFS_I(ip);
699 int mask = iattr->ia_valid;
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000700 xfs_off_t oldsize, newsize;
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200701 struct xfs_trans *tp;
702 int error;
703 uint lock_flags;
704 uint commit_flags = 0;
705
706 trace_xfs_setattr(ip);
707
708 if (mp->m_flags & XFS_MOUNT_RDONLY)
709 return XFS_ERROR(EROFS);
710
711 if (XFS_FORCED_SHUTDOWN(mp))
712 return XFS_ERROR(EIO);
713
714 error = -inode_change_ok(inode, iattr);
715 if (error)
716 return XFS_ERROR(error);
717
718 ASSERT(S_ISREG(ip->i_d.di_mode));
719 ASSERT((mask & (ATTR_MODE|ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_ATIME_SET|
720 ATTR_MTIME_SET|ATTR_KILL_SUID|ATTR_KILL_SGID|
721 ATTR_KILL_PRIV|ATTR_TIMES_SET)) == 0);
722
723 lock_flags = XFS_ILOCK_EXCL;
724 if (!(flags & XFS_ATTR_NOLOCK))
725 lock_flags |= XFS_IOLOCK_EXCL;
726 xfs_ilock(ip, lock_flags);
727
Christoph Hellwigce7ae152011-12-18 20:00:11 +0000728 oldsize = inode->i_size;
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000729 newsize = iattr->ia_size;
730
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200731 /*
732 * Short circuit the truncate case for zero length files.
733 */
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000734 if (newsize == 0 && oldsize == 0 && ip->i_d.di_nextents == 0) {
Christoph Hellwig681b1202011-07-08 14:34:26 +0200735 if (!(mask & (ATTR_CTIME|ATTR_MTIME)))
736 goto out_unlock;
737
738 /*
739 * Use the regular setattr path to update the timestamps.
740 */
741 xfs_iunlock(ip, lock_flags);
742 iattr->ia_valid &= ~ATTR_SIZE;
743 return xfs_setattr_nonsize(ip, iattr, 0);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200744 }
745
746 /*
747 * Make sure that the dquots are attached to the inode.
748 */
749 error = xfs_qm_dqattach_locked(ip, 0);
750 if (error)
751 goto out_unlock;
752
753 /*
754 * Now we can make the changes. Before we join the inode to the
755 * transaction, take care of the part of the truncation that must be
756 * done without the inode lock. This needs to be done before joining
757 * the inode to the transaction, because the inode cannot be unlocked
758 * once it is a part of the transaction.
759 */
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000760 if (newsize > oldsize) {
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200761 /*
762 * Do the first part of growing a file: zero any data in the
763 * last block that is beyond the old EOF. We need to do this
764 * before the inode is joined to the transaction to modify
765 * i_size.
766 */
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000767 error = xfs_zero_eof(ip, newsize, oldsize);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200768 if (error)
769 goto out_unlock;
770 }
771 xfs_iunlock(ip, XFS_ILOCK_EXCL);
772 lock_flags &= ~XFS_ILOCK_EXCL;
773
774 /*
775 * We are going to log the inode size change in this transaction so
776 * any previous writes that are beyond the on disk EOF and the new
777 * EOF that have not been written out need to be written here. If we
778 * do not write the data out, we expose ourselves to the null files
779 * problem.
780 *
781 * Only flush from the on disk size to the smaller of the in memory
782 * file size or the new size as that's the range we really care about
783 * here and prevents waiting for other data not within the range we
784 * care about here.
785 */
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000786 if (oldsize != ip->i_d.di_size && newsize > ip->i_d.di_size) {
787 error = xfs_flush_pages(ip, ip->i_d.di_size, newsize, 0,
Christoph Hellwig2b3ffd72011-08-23 08:28:12 +0000788 FI_NONE);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200789 if (error)
790 goto out_unlock;
791 }
792
793 /*
Christoph Hellwig4a06fd22011-08-23 08:28:13 +0000794 * Wait for all direct I/O to complete.
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200795 */
Christoph Hellwig4a06fd22011-08-23 08:28:13 +0000796 inode_dio_wait(inode);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200797
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000798 error = -block_truncate_page(inode->i_mapping, newsize, xfs_get_blocks);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200799 if (error)
800 goto out_unlock;
801
802 tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_SIZE);
803 error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0,
804 XFS_TRANS_PERM_LOG_RES,
805 XFS_ITRUNCATE_LOG_COUNT);
806 if (error)
807 goto out_trans_cancel;
808
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000809 truncate_setsize(inode, newsize);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200810
811 commit_flags = XFS_TRANS_RELEASE_LOG_RES;
812 lock_flags |= XFS_ILOCK_EXCL;
813
814 xfs_ilock(ip, XFS_ILOCK_EXCL);
815
Christoph Hellwigddc34152011-09-19 15:00:54 +0000816 xfs_trans_ijoin(tp, ip, 0);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200817
818 /*
819 * Only change the c/mtime if we are changing the size or we are
820 * explicitly asked to change it. This handles the semantic difference
821 * between truncate() and ftruncate() as implemented in the VFS.
822 *
823 * The regular truncate() case without ATTR_CTIME and ATTR_MTIME is a
824 * special case where we need to update the times despite not having
825 * these flags set. For all other operations the VFS set these flags
826 * explicitly if it wants a timestamp update.
827 */
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000828 if (newsize != oldsize && (!(mask & (ATTR_CTIME | ATTR_MTIME)))) {
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200829 iattr->ia_ctime = iattr->ia_mtime =
830 current_fs_time(inode->i_sb);
831 mask |= ATTR_CTIME | ATTR_MTIME;
832 }
833
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000834 /*
835 * The first thing we do is set the size to new_size permanently on
836 * disk. This way we don't have to worry about anyone ever being able
837 * to look at the data being freed even in the face of a crash.
838 * What we're getting around here is the case where we free a block, it
839 * is allocated to another file, it is written to, and then we crash.
840 * If the new data gets written to the file but the log buffers
841 * containing the free and reallocation don't, then we'd end up with
842 * garbage in the blocks being freed. As long as we make the new size
843 * permanent before actually freeing any blocks it doesn't matter if
844 * they get written to.
845 */
846 ip->i_d.di_size = newsize;
Christoph Hellwig673e8e52011-12-18 20:00:04 +0000847 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
848
849 if (newsize <= oldsize) {
850 error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, newsize);
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200851 if (error)
852 goto out_trans_abort;
853
854 /*
855 * Truncated "down", so we're removing references to old data
856 * here - if we delay flushing for a long time, we expose
857 * ourselves unduly to the notorious NULL files problem. So,
858 * we mark this inode and flush it when the file is closed,
859 * and do not wait the usual (long) time for writeout.
860 */
861 xfs_iflags_set(ip, XFS_ITRUNCATED);
862 }
863
864 if (mask & ATTR_CTIME) {
865 inode->i_ctime = iattr->ia_ctime;
866 ip->i_d.di_ctime.t_sec = iattr->ia_ctime.tv_sec;
867 ip->i_d.di_ctime.t_nsec = iattr->ia_ctime.tv_nsec;
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200868 }
869 if (mask & ATTR_MTIME) {
870 inode->i_mtime = iattr->ia_mtime;
871 ip->i_d.di_mtime.t_sec = iattr->ia_mtime.tv_sec;
872 ip->i_d.di_mtime.t_nsec = iattr->ia_mtime.tv_nsec;
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200873 }
874
875 xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
876
877 XFS_STATS_INC(xs_ig_attrchg);
878
879 if (mp->m_flags & XFS_MOUNT_WSYNC)
880 xfs_trans_set_sync(tp);
881
882 error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
883out_unlock:
884 if (lock_flags)
885 xfs_iunlock(ip, lock_flags);
886 return error;
887
888out_trans_abort:
889 commit_flags |= XFS_TRANS_ABORT;
890out_trans_cancel:
891 xfs_trans_cancel(tp, commit_flags);
892 goto out_unlock;
893}
894
Linus Torvalds1da177e2005-04-16 15:20:36 -0700895STATIC int
Nathan Scott416c6d52006-03-14 14:00:51 +1100896xfs_vn_setattr(
Linus Torvalds1da177e2005-04-16 15:20:36 -0700897 struct dentry *dentry,
Christoph Hellwig0f285c82008-07-18 17:13:28 +1000898 struct iattr *iattr)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700899{
Christoph Hellwigc4ed4242011-07-08 14:34:23 +0200900 if (iattr->ia_valid & ATTR_SIZE)
901 return -xfs_setattr_size(XFS_I(dentry->d_inode), iattr, 0);
902 return -xfs_setattr_nonsize(XFS_I(dentry->d_inode), iattr, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700903}
904
Eric Sandeenf35642e2008-11-28 14:23:35 +1100905#define XFS_FIEMAP_FLAGS (FIEMAP_FLAG_SYNC|FIEMAP_FLAG_XATTR)
906
907/*
908 * Call fiemap helper to fill in user data.
909 * Returns positive errors to xfs_getbmap.
910 */
911STATIC int
912xfs_fiemap_format(
913 void **arg,
914 struct getbmapx *bmv,
915 int *full)
916{
917 int error;
918 struct fiemap_extent_info *fieinfo = *arg;
919 u32 fiemap_flags = 0;
920 u64 logical, physical, length;
921
922 /* Do nothing for a hole */
923 if (bmv->bmv_block == -1LL)
924 return 0;
925
926 logical = BBTOB(bmv->bmv_offset);
927 physical = BBTOB(bmv->bmv_block);
928 length = BBTOB(bmv->bmv_length);
929
930 if (bmv->bmv_oflags & BMV_OF_PREALLOC)
931 fiemap_flags |= FIEMAP_EXTENT_UNWRITTEN;
932 else if (bmv->bmv_oflags & BMV_OF_DELALLOC) {
933 fiemap_flags |= FIEMAP_EXTENT_DELALLOC;
934 physical = 0; /* no block yet */
935 }
936 if (bmv->bmv_oflags & BMV_OF_LAST)
937 fiemap_flags |= FIEMAP_EXTENT_LAST;
938
939 error = fiemap_fill_next_extent(fieinfo, logical, physical,
940 length, fiemap_flags);
941 if (error > 0) {
942 error = 0;
943 *full = 1; /* user array now full */
944 }
945
946 return -error;
947}
948
949STATIC int
950xfs_vn_fiemap(
951 struct inode *inode,
952 struct fiemap_extent_info *fieinfo,
953 u64 start,
954 u64 length)
955{
956 xfs_inode_t *ip = XFS_I(inode);
957 struct getbmapx bm;
958 int error;
959
960 error = fiemap_check_flags(fieinfo, XFS_FIEMAP_FLAGS);
961 if (error)
962 return error;
963
964 /* Set up bmap header for xfs internal routine */
965 bm.bmv_offset = BTOBB(start);
966 /* Special case for whole file */
967 if (length == FIEMAP_MAX_OFFSET)
968 bm.bmv_length = -1LL;
969 else
970 bm.bmv_length = BTOBB(length);
971
Eric Sandeen97db39a2009-07-26 21:52:01 -0500972 /* We add one because in getbmap world count includes the header */
Tao Ma2d1ff3c2010-04-29 15:13:56 +1000973 bm.bmv_count = !fieinfo->fi_extents_max ? MAXEXTNUM :
974 fieinfo->fi_extents_max + 1;
975 bm.bmv_count = min_t(__s32, bm.bmv_count,
976 (PAGE_SIZE * 16 / sizeof(struct getbmapx)));
Tao Ma9af25462010-08-30 02:44:03 +0000977 bm.bmv_iflags = BMV_IF_PREALLOC | BMV_IF_NO_HOLES;
Eric Sandeenf35642e2008-11-28 14:23:35 +1100978 if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR)
979 bm.bmv_iflags |= BMV_IF_ATTRFORK;
980 if (!(fieinfo->fi_flags & FIEMAP_FLAG_SYNC))
981 bm.bmv_iflags |= BMV_IF_DELALLOC;
982
983 error = xfs_getbmap(ip, &bm, xfs_fiemap_format, fieinfo);
984 if (error)
985 return -error;
986
987 return 0;
988}
989
Christoph Hellwig41be8be2008-08-13 16:23:13 +1000990static const struct inode_operations xfs_inode_operations = {
Christoph Hellwig4e34e712011-07-23 17:37:31 +0200991 .get_acl = xfs_get_acl,
Nathan Scott416c6d52006-03-14 14:00:51 +1100992 .getattr = xfs_vn_getattr,
993 .setattr = xfs_vn_setattr,
Lachlan McIlroy0ec58512008-06-23 13:23:01 +1000994 .setxattr = generic_setxattr,
995 .getxattr = generic_getxattr,
996 .removexattr = generic_removexattr,
Nathan Scott416c6d52006-03-14 14:00:51 +1100997 .listxattr = xfs_vn_listxattr,
Eric Sandeenf35642e2008-11-28 14:23:35 +1100998 .fiemap = xfs_vn_fiemap,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700999};
1000
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001001static const struct inode_operations xfs_dir_inode_operations = {
Nathan Scott416c6d52006-03-14 14:00:51 +11001002 .create = xfs_vn_create,
1003 .lookup = xfs_vn_lookup,
1004 .link = xfs_vn_link,
1005 .unlink = xfs_vn_unlink,
1006 .symlink = xfs_vn_symlink,
1007 .mkdir = xfs_vn_mkdir,
Christoph Hellwig8f112e32008-06-23 13:25:17 +10001008 /*
1009 * Yes, XFS uses the same method for rmdir and unlink.
1010 *
1011 * There are some subtile differences deeper in the code,
1012 * but we use S_ISDIR to check for those.
1013 */
1014 .rmdir = xfs_vn_unlink,
Nathan Scott416c6d52006-03-14 14:00:51 +11001015 .mknod = xfs_vn_mknod,
1016 .rename = xfs_vn_rename,
Christoph Hellwig4e34e712011-07-23 17:37:31 +02001017 .get_acl = xfs_get_acl,
Nathan Scott416c6d52006-03-14 14:00:51 +11001018 .getattr = xfs_vn_getattr,
1019 .setattr = xfs_vn_setattr,
Lachlan McIlroy0ec58512008-06-23 13:23:01 +10001020 .setxattr = generic_setxattr,
1021 .getxattr = generic_getxattr,
1022 .removexattr = generic_removexattr,
Nathan Scott416c6d52006-03-14 14:00:51 +11001023 .listxattr = xfs_vn_listxattr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001024};
1025
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001026static const struct inode_operations xfs_dir_ci_inode_operations = {
Barry Naujok384f3ce2008-05-21 16:58:22 +10001027 .create = xfs_vn_create,
1028 .lookup = xfs_vn_ci_lookup,
1029 .link = xfs_vn_link,
1030 .unlink = xfs_vn_unlink,
1031 .symlink = xfs_vn_symlink,
1032 .mkdir = xfs_vn_mkdir,
Christoph Hellwig8f112e32008-06-23 13:25:17 +10001033 /*
1034 * Yes, XFS uses the same method for rmdir and unlink.
1035 *
1036 * There are some subtile differences deeper in the code,
1037 * but we use S_ISDIR to check for those.
1038 */
1039 .rmdir = xfs_vn_unlink,
Barry Naujok384f3ce2008-05-21 16:58:22 +10001040 .mknod = xfs_vn_mknod,
1041 .rename = xfs_vn_rename,
Christoph Hellwig4e34e712011-07-23 17:37:31 +02001042 .get_acl = xfs_get_acl,
Barry Naujok384f3ce2008-05-21 16:58:22 +10001043 .getattr = xfs_vn_getattr,
1044 .setattr = xfs_vn_setattr,
Lachlan McIlroy0ec58512008-06-23 13:23:01 +10001045 .setxattr = generic_setxattr,
1046 .getxattr = generic_getxattr,
1047 .removexattr = generic_removexattr,
Barry Naujok384f3ce2008-05-21 16:58:22 +10001048 .listxattr = xfs_vn_listxattr,
Barry Naujok384f3ce2008-05-21 16:58:22 +10001049};
1050
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001051static const struct inode_operations xfs_symlink_inode_operations = {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001052 .readlink = generic_readlink,
Nathan Scott416c6d52006-03-14 14:00:51 +11001053 .follow_link = xfs_vn_follow_link,
1054 .put_link = xfs_vn_put_link,
Christoph Hellwig4e34e712011-07-23 17:37:31 +02001055 .get_acl = xfs_get_acl,
Nathan Scott416c6d52006-03-14 14:00:51 +11001056 .getattr = xfs_vn_getattr,
1057 .setattr = xfs_vn_setattr,
Lachlan McIlroy0ec58512008-06-23 13:23:01 +10001058 .setxattr = generic_setxattr,
1059 .getxattr = generic_getxattr,
1060 .removexattr = generic_removexattr,
Nathan Scott416c6d52006-03-14 14:00:51 +11001061 .listxattr = xfs_vn_listxattr,
Linus Torvalds1da177e2005-04-16 15:20:36 -07001062};
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001063
1064STATIC void
1065xfs_diflags_to_iflags(
1066 struct inode *inode,
1067 struct xfs_inode *ip)
1068{
1069 if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE)
1070 inode->i_flags |= S_IMMUTABLE;
1071 else
1072 inode->i_flags &= ~S_IMMUTABLE;
1073 if (ip->i_d.di_flags & XFS_DIFLAG_APPEND)
1074 inode->i_flags |= S_APPEND;
1075 else
1076 inode->i_flags &= ~S_APPEND;
1077 if (ip->i_d.di_flags & XFS_DIFLAG_SYNC)
1078 inode->i_flags |= S_SYNC;
1079 else
1080 inode->i_flags &= ~S_SYNC;
1081 if (ip->i_d.di_flags & XFS_DIFLAG_NOATIME)
1082 inode->i_flags |= S_NOATIME;
1083 else
1084 inode->i_flags &= ~S_NOATIME;
1085}
1086
1087/*
1088 * Initialize the Linux inode, set up the operation vectors and
1089 * unlock the inode.
1090 *
1091 * When reading existing inodes from disk this is called directly
1092 * from xfs_iget, when creating a new inode it is called from
1093 * xfs_ialloc after setting up the inode.
David Chinnerbf904242008-10-30 17:36:14 +11001094 *
1095 * We are always called with an uninitialised linux inode here.
1096 * We need to initialise the necessary fields and take a reference
1097 * on it.
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001098 */
1099void
1100xfs_setup_inode(
1101 struct xfs_inode *ip)
1102{
David Chinnerbf904242008-10-30 17:36:14 +11001103 struct inode *inode = &ip->i_vnode;
1104
1105 inode->i_ino = ip->i_ino;
Christoph Hellwigeaff8072009-12-17 14:25:01 +01001106 inode->i_state = I_NEW;
Christoph Hellwig646ec462010-10-23 07:15:32 -04001107
1108 inode_sb_list_add(inode);
Christoph Hellwigc6f6cd02010-11-06 11:43:08 +00001109 /* make the inode look hashed for the writeback code */
1110 hlist_add_fake(&inode->i_hash);
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001111
1112 inode->i_mode = ip->i_d.di_mode;
Miklos Szeredibfe86842011-10-28 14:13:29 +02001113 set_nlink(inode, ip->i_d.di_nlink);
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001114 inode->i_uid = ip->i_d.di_uid;
1115 inode->i_gid = ip->i_d.di_gid;
1116
1117 switch (inode->i_mode & S_IFMT) {
1118 case S_IFBLK:
1119 case S_IFCHR:
1120 inode->i_rdev =
1121 MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff,
1122 sysv_minor(ip->i_df.if_u2.if_rdev));
1123 break;
1124 default:
1125 inode->i_rdev = 0;
1126 break;
1127 }
1128
1129 inode->i_generation = ip->i_d.di_gen;
1130 i_size_write(inode, ip->i_d.di_size);
1131 inode->i_atime.tv_sec = ip->i_d.di_atime.t_sec;
1132 inode->i_atime.tv_nsec = ip->i_d.di_atime.t_nsec;
1133 inode->i_mtime.tv_sec = ip->i_d.di_mtime.t_sec;
1134 inode->i_mtime.tv_nsec = ip->i_d.di_mtime.t_nsec;
1135 inode->i_ctime.tv_sec = ip->i_d.di_ctime.t_sec;
1136 inode->i_ctime.tv_nsec = ip->i_d.di_ctime.t_nsec;
1137 xfs_diflags_to_iflags(inode, ip);
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001138
1139 switch (inode->i_mode & S_IFMT) {
1140 case S_IFREG:
1141 inode->i_op = &xfs_inode_operations;
1142 inode->i_fop = &xfs_file_operations;
1143 inode->i_mapping->a_ops = &xfs_address_space_operations;
1144 break;
1145 case S_IFDIR:
1146 if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb))
1147 inode->i_op = &xfs_dir_ci_inode_operations;
1148 else
1149 inode->i_op = &xfs_dir_inode_operations;
1150 inode->i_fop = &xfs_dir_file_operations;
1151 break;
1152 case S_IFLNK:
1153 inode->i_op = &xfs_symlink_inode_operations;
1154 if (!(ip->i_df.if_flags & XFS_IFINLINE))
1155 inode->i_mapping->a_ops = &xfs_address_space_operations;
1156 break;
1157 default:
1158 inode->i_op = &xfs_inode_operations;
1159 init_special_inode(inode, inode->i_mode, inode->i_rdev);
1160 break;
1161 }
1162
Christoph Hellwig510792e2011-07-26 15:07:29 +00001163 /*
1164 * If there is no attribute fork no ACL can exist on this inode,
1165 * and it can't have any file capabilities attached to it either.
1166 */
1167 if (!XFS_IFORK_Q(ip)) {
1168 inode_has_no_xattr(inode);
Christoph Hellwig6311b102011-07-23 17:36:50 +02001169 cache_no_acl(inode);
Christoph Hellwig510792e2011-07-26 15:07:29 +00001170 }
Christoph Hellwig6311b102011-07-23 17:36:50 +02001171
Christoph Hellwig41be8be2008-08-13 16:23:13 +10001172 xfs_iflags_clear(ip, XFS_INEW);
1173 barrier();
1174
1175 unlock_new_inode(inode);
1176}