Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 2 | * Copyright (c) 2000-2005 Silicon Graphics, Inc. |
| 3 | * All Rights Reserved. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 5 | * 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 7 | * published by the Free Software Foundation. |
| 8 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 9 | * 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 13 | * |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 14 | * 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 17 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 18 | #include "xfs.h" |
| 19 | #include "xfs_fs.h" |
Christoph Hellwig | ef14f0c | 2009-06-10 17:07:47 +0200 | [diff] [blame] | 20 | #include "xfs_acl.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | #include "xfs_log.h" |
| 22 | #include "xfs_trans.h" |
| 23 | #include "xfs_sb.h" |
| 24 | #include "xfs_ag.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 25 | #include "xfs_alloc.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include "xfs_quota.h" |
| 27 | #include "xfs_mount.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include "xfs_bmap_btree.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include "xfs_dinode.h" |
| 30 | #include "xfs_inode.h" |
| 31 | #include "xfs_bmap.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include "xfs_rtalloc.h" |
| 33 | #include "xfs_error.h" |
| 34 | #include "xfs_itable.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include "xfs_attr.h" |
| 36 | #include "xfs_buf_item.h" |
| 37 | #include "xfs_utils.h" |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 38 | #include "xfs_vnodeops.h" |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 39 | #include "xfs_inode_item.h" |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 40 | #include "xfs_trace.h" |
Brian Foster | 27b5286 | 2012-11-06 09:50:38 -0500 | [diff] [blame] | 41 | #include "xfs_icache.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | |
Randy Dunlap | 16f7e0f | 2006-01-11 12:17:46 -0800 | [diff] [blame] | 43 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #include <linux/xattr.h> |
| 45 | #include <linux/namei.h> |
Christoph Hellwig | ef14f0c | 2009-06-10 17:07:47 +0200 | [diff] [blame] | 46 | #include <linux/posix_acl.h> |
Nathan Scott | 446ada4 | 2006-01-11 15:35:44 +1100 | [diff] [blame] | 47 | #include <linux/security.h> |
Eric Sandeen | f35642e | 2008-11-28 14:23:35 +1100 | [diff] [blame] | 48 | #include <linux/fiemap.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 49 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | |
Dave Chinner | 8d2a5e6 | 2012-03-07 04:50:19 +0000 | [diff] [blame] | 51 | static int |
| 52 | xfs_initxattrs( |
| 53 | struct inode *inode, |
| 54 | const struct xattr *xattr_array, |
| 55 | void *fs_info) |
Mimi Zohar | 9d8f13b | 2011-06-06 15:29:25 -0400 | [diff] [blame] | 56 | { |
Dave Chinner | 8d2a5e6 | 2012-03-07 04:50:19 +0000 | [diff] [blame] | 57 | const struct xattr *xattr; |
| 58 | struct xfs_inode *ip = XFS_I(inode); |
| 59 | int error = 0; |
Mimi Zohar | 9d8f13b | 2011-06-06 15:29:25 -0400 | [diff] [blame] | 60 | |
| 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 Chinner | 5d51eff | 2007-11-23 16:29:18 +1100 | [diff] [blame] | 70 | /* |
Nathan Scott | 446ada4 | 2006-01-11 15:35:44 +1100 | [diff] [blame] | 71 | * 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 Zohar | 9d8f13b | 2011-06-06 15:29:25 -0400 | [diff] [blame] | 76 | |
Nathan Scott | 446ada4 | 2006-01-11 15:35:44 +1100 | [diff] [blame] | 77 | STATIC int |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 78 | xfs_init_security( |
Christoph Hellwig | af04819 | 2008-03-06 13:46:43 +1100 | [diff] [blame] | 79 | struct inode *inode, |
Eric Paris | 2a7dba3 | 2011-02-01 11:05:39 -0500 | [diff] [blame] | 80 | struct inode *dir, |
| 81 | const struct qstr *qstr) |
Nathan Scott | 446ada4 | 2006-01-11 15:35:44 +1100 | [diff] [blame] | 82 | { |
Mimi Zohar | 9d8f13b | 2011-06-06 15:29:25 -0400 | [diff] [blame] | 83 | return security_inode_init_security(inode, dir, qstr, |
| 84 | &xfs_initxattrs, NULL); |
Nathan Scott | 446ada4 | 2006-01-11 15:35:44 +1100 | [diff] [blame] | 85 | } |
| 86 | |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 87 | static void |
| 88 | xfs_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 Chinner | 7989cb8 | 2007-02-10 18:34:56 +1100 | [diff] [blame] | 96 | STATIC void |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 97 | xfs_cleanup_inode( |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 98 | struct inode *dir, |
Christoph Hellwig | af04819 | 2008-03-06 13:46:43 +1100 | [diff] [blame] | 99 | struct inode *inode, |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 100 | struct dentry *dentry) |
Yingping Lu | 3a69c7d | 2006-02-01 12:14:34 +1100 | [diff] [blame] | 101 | { |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 102 | struct xfs_name teardown; |
Yingping Lu | 3a69c7d | 2006-02-01 12:14:34 +1100 | [diff] [blame] | 103 | |
| 104 | /* Oh, the horror. |
Nathan Scott | 220b528 | 2006-03-14 13:33:36 +1100 | [diff] [blame] | 105 | * If we can't add the ACL or we fail in |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 106 | * xfs_init_security we must back out. |
Yingping Lu | 3a69c7d | 2006-02-01 12:14:34 +1100 | [diff] [blame] | 107 | * ENOSPC can hit here, among other things. |
| 108 | */ |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 109 | xfs_dentry_to_name(&teardown, dentry); |
Yingping Lu | 3a69c7d | 2006-02-01 12:14:34 +1100 | [diff] [blame] | 110 | |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 111 | xfs_remove(XFS_I(dir), &teardown, XFS_I(inode)); |
Christoph Hellwig | af04819 | 2008-03-06 13:46:43 +1100 | [diff] [blame] | 112 | iput(inode); |
Yingping Lu | 3a69c7d | 2006-02-01 12:14:34 +1100 | [diff] [blame] | 113 | } |
| 114 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | STATIC int |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 116 | xfs_vn_mknod( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | struct inode *dir, |
| 118 | struct dentry *dentry, |
Al Viro | 1a67aaf | 2011-07-26 01:52:52 -0400 | [diff] [blame] | 119 | umode_t mode, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 120 | dev_t rdev) |
| 121 | { |
Christoph Hellwig | db0bb7b | 2008-03-06 13:44:35 +1100 | [diff] [blame] | 122 | struct inode *inode; |
Christoph Hellwig | 979ebab | 2008-03-06 13:46:05 +1100 | [diff] [blame] | 123 | struct xfs_inode *ip = NULL; |
Christoph Hellwig | ef14f0c | 2009-06-10 17:07:47 +0200 | [diff] [blame] | 124 | struct posix_acl *default_acl = NULL; |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 125 | struct xfs_name name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | 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 Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 132 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | |
Christoph Hellwig | ef14f0c | 2009-06-10 17:07:47 +0200 | [diff] [blame] | 140 | if (IS_POSIXACL(dir)) { |
| 141 | default_acl = xfs_get_acl(dir, ACL_TYPE_DEFAULT); |
| 142 | if (IS_ERR(default_acl)) |
Al Viro | c46a131 | 2011-06-05 11:12:31 +0000 | [diff] [blame] | 143 | return PTR_ERR(default_acl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | |
Christoph Hellwig | e83f1eb | 2009-06-12 11:19:11 -0400 | [diff] [blame] | 145 | if (!default_acl) |
| 146 | mode &= ~current_umask(); |
Christoph Hellwig | ef14f0c | 2009-06-10 17:07:47 +0200 | [diff] [blame] | 147 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 148 | |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 149 | xfs_dentry_to_name(&name, dentry); |
Christoph Hellwig | 6c77b0e | 2010-10-06 18:41:17 +0000 | [diff] [blame] | 150 | error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip); |
Christoph Hellwig | db0bb7b | 2008-03-06 13:44:35 +1100 | [diff] [blame] | 151 | if (unlikely(error)) |
| 152 | goto out_free_acl; |
Nathan Scott | 446ada4 | 2006-01-11 15:35:44 +1100 | [diff] [blame] | 153 | |
David Chinner | 0165164 | 2008-08-13 15:45:15 +1000 | [diff] [blame] | 154 | inode = VFS_I(ip); |
Christoph Hellwig | 979ebab | 2008-03-06 13:46:05 +1100 | [diff] [blame] | 155 | |
Eric Paris | 2a7dba3 | 2011-02-01 11:05:39 -0500 | [diff] [blame] | 156 | error = xfs_init_security(inode, dir, &dentry->d_name); |
Christoph Hellwig | db0bb7b | 2008-03-06 13:44:35 +1100 | [diff] [blame] | 157 | if (unlikely(error)) |
| 158 | goto out_cleanup_inode; |
| 159 | |
| 160 | if (default_acl) { |
Christoph Hellwig | ef14f0c | 2009-06-10 17:07:47 +0200 | [diff] [blame] | 161 | error = -xfs_inherit_acl(inode, default_acl); |
Al Viro | 826cae2 | 2011-07-23 03:10:32 -0400 | [diff] [blame] | 162 | default_acl = NULL; |
Christoph Hellwig | db0bb7b | 2008-03-06 13:44:35 +1100 | [diff] [blame] | 163 | if (unlikely(error)) |
| 164 | goto out_cleanup_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | } |
| 166 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | |
Christoph Hellwig | db0bb7b | 2008-03-06 13:44:35 +1100 | [diff] [blame] | 168 | d_instantiate(dentry, inode); |
Christoph Hellwig | db0bb7b | 2008-03-06 13:44:35 +1100 | [diff] [blame] | 169 | return -error; |
| 170 | |
| 171 | out_cleanup_inode: |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 172 | xfs_cleanup_inode(dir, inode, dentry); |
Christoph Hellwig | db0bb7b | 2008-03-06 13:44:35 +1100 | [diff] [blame] | 173 | out_free_acl: |
Christoph Hellwig | ef14f0c | 2009-06-10 17:07:47 +0200 | [diff] [blame] | 174 | posix_acl_release(default_acl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | return -error; |
| 176 | } |
| 177 | |
| 178 | STATIC int |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 179 | xfs_vn_create( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | struct inode *dir, |
| 181 | struct dentry *dentry, |
Al Viro | 4acdaf2 | 2011-07-26 01:42:34 -0400 | [diff] [blame] | 182 | umode_t mode, |
Al Viro | ebfc3b4 | 2012-06-10 18:05:36 -0400 | [diff] [blame] | 183 | bool flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | { |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 185 | return xfs_vn_mknod(dir, dentry, mode, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | } |
| 187 | |
| 188 | STATIC int |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 189 | xfs_vn_mkdir( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | struct inode *dir, |
| 191 | struct dentry *dentry, |
Al Viro | 18bb1db | 2011-07-26 01:41:39 -0400 | [diff] [blame] | 192 | umode_t mode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | { |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 194 | return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | } |
| 196 | |
| 197 | STATIC struct dentry * |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 198 | xfs_vn_lookup( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | struct inode *dir, |
| 200 | struct dentry *dentry, |
Al Viro | 00cd8dd | 2012-06-10 17:13:09 -0400 | [diff] [blame] | 201 | unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | { |
Christoph Hellwig | ef1f5e7 | 2008-03-06 13:46:25 +1100 | [diff] [blame] | 203 | struct xfs_inode *cip; |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 204 | struct xfs_name name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | int error; |
| 206 | |
| 207 | if (dentry->d_name.len >= MAXNAMELEN) |
| 208 | return ERR_PTR(-ENAMETOOLONG); |
| 209 | |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 210 | xfs_dentry_to_name(&name, dentry); |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 211 | error = xfs_lookup(XFS_I(dir), &name, &cip, NULL); |
Nathan Scott | 67fcaa7 | 2006-06-09 17:00:52 +1000 | [diff] [blame] | 212 | if (unlikely(error)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | if (unlikely(error != ENOENT)) |
| 214 | return ERR_PTR(-error); |
| 215 | d_add(dentry, NULL); |
| 216 | return NULL; |
| 217 | } |
| 218 | |
David Chinner | 0165164 | 2008-08-13 15:45:15 +1000 | [diff] [blame] | 219 | return d_splice_alias(VFS_I(cip), dentry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 220 | } |
| 221 | |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 222 | STATIC struct dentry * |
| 223 | xfs_vn_ci_lookup( |
| 224 | struct inode *dir, |
| 225 | struct dentry *dentry, |
Al Viro | 00cd8dd | 2012-06-10 17:13:09 -0400 | [diff] [blame] | 226 | unsigned int flags) |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 227 | { |
| 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 Naujok | 866d5dc | 2008-05-22 17:21:40 +1000 | [diff] [blame] | 242 | /* |
| 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 Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 247 | return NULL; |
| 248 | } |
| 249 | |
| 250 | /* if exact match, just splice and exit */ |
| 251 | if (!ci_name.name) |
David Chinner | 0165164 | 2008-08-13 15:45:15 +1000 | [diff] [blame] | 252 | return d_splice_alias(VFS_I(ip), dentry); |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 253 | |
| 254 | /* else case-insensitive match... */ |
| 255 | dname.name = ci_name.name; |
| 256 | dname.len = ci_name.len; |
Christoph Hellwig | e45b590 | 2008-08-07 23:49:07 +0200 | [diff] [blame] | 257 | dentry = d_add_ci(dentry, VFS_I(ip), &dname); |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 258 | kmem_free(ci_name.name); |
| 259 | return dentry; |
| 260 | } |
| 261 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | STATIC int |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 263 | xfs_vn_link( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | struct dentry *old_dentry, |
| 265 | struct inode *dir, |
| 266 | struct dentry *dentry) |
| 267 | { |
Christoph Hellwig | d9424b3 | 2008-12-03 12:20:27 +0100 | [diff] [blame] | 268 | struct inode *inode = old_dentry->d_inode; |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 269 | struct xfs_name name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | int error; |
| 271 | |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 272 | xfs_dentry_to_name(&name, dentry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 274 | error = xfs_link(XFS_I(dir), XFS_I(inode), &name); |
Christoph Hellwig | d9424b3 | 2008-12-03 12:20:27 +0100 | [diff] [blame] | 275 | if (unlikely(error)) |
Christoph Hellwig | a3da789 | 2008-03-06 13:46:12 +1100 | [diff] [blame] | 276 | return -error; |
Christoph Hellwig | a3da789 | 2008-03-06 13:46:12 +1100 | [diff] [blame] | 277 | |
Al Viro | 7de9c6ee | 2010-10-23 11:11:40 -0400 | [diff] [blame] | 278 | ihold(inode); |
Christoph Hellwig | a3da789 | 2008-03-06 13:46:12 +1100 | [diff] [blame] | 279 | d_instantiate(dentry, inode); |
| 280 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | } |
| 282 | |
| 283 | STATIC int |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 284 | xfs_vn_unlink( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 285 | struct inode *dir, |
| 286 | struct dentry *dentry) |
| 287 | { |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 288 | struct xfs_name name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 289 | int error; |
| 290 | |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 291 | xfs_dentry_to_name(&name, dentry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | |
Christoph Hellwig | e570070 | 2008-06-23 13:25:25 +1000 | [diff] [blame] | 293 | 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 Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | } |
| 306 | |
| 307 | STATIC int |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 308 | xfs_vn_symlink( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | struct inode *dir, |
| 310 | struct dentry *dentry, |
| 311 | const char *symname) |
| 312 | { |
Christoph Hellwig | 3937be5 | 2008-03-06 13:46:19 +1100 | [diff] [blame] | 313 | struct inode *inode; |
| 314 | struct xfs_inode *cip = NULL; |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 315 | struct xfs_name name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | int error; |
Al Viro | 576b1d6 | 2011-07-26 02:50:15 -0400 | [diff] [blame] | 317 | umode_t mode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | |
Christoph Hellwig | 3e5daf0 | 2007-10-11 18:09:12 +1000 | [diff] [blame] | 319 | mode = S_IFLNK | |
Al Viro | ce3b0f8 | 2009-03-29 19:08:22 -0400 | [diff] [blame] | 320 | (irix_symlink_mode ? 0777 & ~current_umask() : S_IRWXUGO); |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 321 | xfs_dentry_to_name(&name, dentry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | |
Christoph Hellwig | 6c77b0e | 2010-10-06 18:41:17 +0000 | [diff] [blame] | 323 | error = xfs_symlink(XFS_I(dir), &name, symname, mode, &cip); |
Christoph Hellwig | 3937be5 | 2008-03-06 13:46:19 +1100 | [diff] [blame] | 324 | if (unlikely(error)) |
| 325 | goto out; |
| 326 | |
David Chinner | 0165164 | 2008-08-13 15:45:15 +1000 | [diff] [blame] | 327 | inode = VFS_I(cip); |
Christoph Hellwig | 3937be5 | 2008-03-06 13:46:19 +1100 | [diff] [blame] | 328 | |
Eric Paris | 2a7dba3 | 2011-02-01 11:05:39 -0500 | [diff] [blame] | 329 | error = xfs_init_security(inode, dir, &dentry->d_name); |
Christoph Hellwig | 3937be5 | 2008-03-06 13:46:19 +1100 | [diff] [blame] | 330 | if (unlikely(error)) |
| 331 | goto out_cleanup_inode; |
| 332 | |
| 333 | d_instantiate(dentry, inode); |
Christoph Hellwig | 3937be5 | 2008-03-06 13:46:19 +1100 | [diff] [blame] | 334 | return 0; |
| 335 | |
| 336 | out_cleanup_inode: |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 337 | xfs_cleanup_inode(dir, inode, dentry); |
Christoph Hellwig | 3937be5 | 2008-03-06 13:46:19 +1100 | [diff] [blame] | 338 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | return -error; |
| 340 | } |
| 341 | |
| 342 | STATIC int |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 343 | xfs_vn_rename( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | 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 Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 350 | struct xfs_name oname; |
| 351 | struct xfs_name nname; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 352 | |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 353 | xfs_dentry_to_name(&oname, odentry); |
| 354 | xfs_dentry_to_name(&nname, ndentry); |
| 355 | |
Christoph Hellwig | e570070 | 2008-06-23 13:25:25 +1000 | [diff] [blame] | 356 | return -xfs_rename(XFS_I(odir), &oname, XFS_I(odentry->d_inode), |
Christoph Hellwig | cfa853e | 2008-04-22 17:34:06 +1000 | [diff] [blame] | 357 | XFS_I(ndir), &nname, new_inode ? |
| 358 | XFS_I(new_inode) : NULL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | } |
| 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 Viro | 008b150 | 2005-08-20 00:17:39 +0100 | [diff] [blame] | 366 | STATIC void * |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 367 | xfs_vn_follow_link( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | struct dentry *dentry, |
| 369 | struct nameidata *nd) |
| 370 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | char *link; |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 372 | int error = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | |
Panagiotis Issaris | f52720c | 2006-09-27 01:49:39 -0700 | [diff] [blame] | 374 | link = kmalloc(MAXPATHLEN+1, GFP_KERNEL); |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 375 | if (!link) |
| 376 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 378 | error = -xfs_readlink(XFS_I(dentry->d_inode), link); |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 379 | if (unlikely(error)) |
| 380 | goto out_kfree; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | |
| 382 | nd_set_link(nd, link); |
Al Viro | 008b150 | 2005-08-20 00:17:39 +0100 | [diff] [blame] | 383 | return NULL; |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 384 | |
| 385 | out_kfree: |
| 386 | kfree(link); |
| 387 | out_err: |
| 388 | nd_set_link(nd, ERR_PTR(error)); |
| 389 | return NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | } |
| 391 | |
Nathan Scott | cde410a | 2005-09-05 11:47:01 +1000 | [diff] [blame] | 392 | STATIC void |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 393 | xfs_vn_put_link( |
Nathan Scott | cde410a | 2005-09-05 11:47:01 +1000 | [diff] [blame] | 394 | struct dentry *dentry, |
| 395 | struct nameidata *nd, |
| 396 | void *p) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | { |
Nathan Scott | cde410a | 2005-09-05 11:47:01 +1000 | [diff] [blame] | 398 | char *s = nd_get_link(nd); |
| 399 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | if (!IS_ERR(s)) |
| 401 | kfree(s); |
| 402 | } |
| 403 | |
Christoph Hellwig | 4576758 | 2008-02-05 12:13:24 +1100 | [diff] [blame] | 404 | STATIC int |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 405 | xfs_vn_getattr( |
Christoph Hellwig | c43f408 | 2007-10-11 17:46:39 +1000 | [diff] [blame] | 406 | struct vfsmount *mnt, |
| 407 | struct dentry *dentry, |
| 408 | struct kstat *stat) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | { |
Christoph Hellwig | c43f408 | 2007-10-11 17:46:39 +1000 | [diff] [blame] | 410 | struct inode *inode = dentry->d_inode; |
| 411 | struct xfs_inode *ip = XFS_I(inode); |
| 412 | struct xfs_mount *mp = ip->i_mount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 413 | |
Christoph Hellwig | cca28fb | 2010-06-24 11:57:09 +1000 | [diff] [blame] | 414 | trace_xfs_getattr(ip); |
Christoph Hellwig | c43f408 | 2007-10-11 17:46:39 +1000 | [diff] [blame] | 415 | |
| 416 | if (XFS_FORCED_SHUTDOWN(mp)) |
Mitsuo Hayasaka | ed32201 | 2011-09-17 13:38:38 +0000 | [diff] [blame] | 417 | return -XFS_ERROR(EIO); |
Christoph Hellwig | c43f408 | 2007-10-11 17:46:39 +1000 | [diff] [blame] | 418 | |
| 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 Hellwig | c43f408 | 2007-10-11 17:46:39 +1000 | [diff] [blame] | 426 | stat->atime = inode->i_atime; |
Christoph Hellwig | f9581b1 | 2009-10-06 20:29:26 +0000 | [diff] [blame] | 427 | stat->mtime = inode->i_mtime; |
| 428 | stat->ctime = inode->i_ctime; |
Christoph Hellwig | c43f408 | 2007-10-11 17:46:39 +1000 | [diff] [blame] | 429 | 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 Sandeen | 71ddabb | 2007-11-23 16:29:42 +1100 | [diff] [blame] | 441 | if (XFS_IS_REALTIME_INODE(ip)) { |
Christoph Hellwig | c43f408 | 2007-10-11 17:46:39 +1000 | [diff] [blame] | 442 | /* |
| 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 Scott | 69e23b9 | 2006-09-28 11:01:22 +1000 | [diff] [blame] | 453 | } |
Christoph Hellwig | c43f408 | 2007-10-11 17:46:39 +1000 | [diff] [blame] | 454 | |
| 455 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 456 | } |
| 457 | |
Dave Chinner | 56c19e8 | 2013-05-27 16:38:25 +1000 | [diff] [blame] | 458 | static void |
| 459 | xfs_setattr_mode( |
| 460 | struct xfs_trans *tp, |
| 461 | struct xfs_inode *ip, |
| 462 | struct iattr *iattr) |
| 463 | { |
| 464 | struct inode *inode = VFS_I(ip); |
| 465 | umode_t mode = iattr->ia_mode; |
| 466 | |
| 467 | ASSERT(tp); |
| 468 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
| 469 | |
Dave Chinner | 56c19e8 | 2013-05-27 16:38:25 +1000 | [diff] [blame] | 470 | ip->i_d.di_mode &= S_IFMT; |
| 471 | ip->i_d.di_mode |= mode & ~S_IFMT; |
| 472 | |
| 473 | inode->i_mode &= S_IFMT; |
| 474 | inode->i_mode |= mode & ~S_IFMT; |
| 475 | } |
| 476 | |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 477 | int |
| 478 | xfs_setattr_nonsize( |
| 479 | struct xfs_inode *ip, |
| 480 | struct iattr *iattr, |
| 481 | int flags) |
| 482 | { |
| 483 | xfs_mount_t *mp = ip->i_mount; |
| 484 | struct inode *inode = VFS_I(ip); |
| 485 | int mask = iattr->ia_valid; |
| 486 | xfs_trans_t *tp; |
| 487 | int error; |
| 488 | uid_t uid = 0, iuid = 0; |
| 489 | gid_t gid = 0, igid = 0; |
| 490 | struct xfs_dquot *udqp = NULL, *gdqp = NULL; |
| 491 | struct xfs_dquot *olddquot1 = NULL, *olddquot2 = NULL; |
| 492 | |
| 493 | trace_xfs_setattr(ip); |
| 494 | |
Carlos Maiolino | 42c49d7 | 2013-06-21 14:45:53 -0300 | [diff] [blame] | 495 | /* If acls are being inherited, we already have this checked */ |
| 496 | if (!(flags & XFS_ATTR_NOACL)) { |
| 497 | if (mp->m_flags & XFS_MOUNT_RDONLY) |
| 498 | return XFS_ERROR(EROFS); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 499 | |
Carlos Maiolino | 42c49d7 | 2013-06-21 14:45:53 -0300 | [diff] [blame] | 500 | if (XFS_FORCED_SHUTDOWN(mp)) |
| 501 | return XFS_ERROR(EIO); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 502 | |
Carlos Maiolino | 42c49d7 | 2013-06-21 14:45:53 -0300 | [diff] [blame] | 503 | error = -inode_change_ok(inode, iattr); |
| 504 | if (error) |
| 505 | return XFS_ERROR(error); |
| 506 | } |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 507 | |
| 508 | ASSERT((mask & ATTR_SIZE) == 0); |
| 509 | |
| 510 | /* |
| 511 | * If disk quotas is on, we make sure that the dquots do exist on disk, |
| 512 | * before we start any other transactions. Trying to do this later |
| 513 | * is messy. We don't care to take a readlock to look at the ids |
| 514 | * in inode here, because we can't hold it across the trans_reserve. |
| 515 | * If the IDs do change before we take the ilock, we're covered |
| 516 | * because the i_*dquot fields will get updated anyway. |
| 517 | */ |
| 518 | if (XFS_IS_QUOTA_ON(mp) && (mask & (ATTR_UID|ATTR_GID))) { |
| 519 | uint qflags = 0; |
| 520 | |
| 521 | if ((mask & ATTR_UID) && XFS_IS_UQUOTA_ON(mp)) { |
| 522 | uid = iattr->ia_uid; |
| 523 | qflags |= XFS_QMOPT_UQUOTA; |
| 524 | } else { |
| 525 | uid = ip->i_d.di_uid; |
| 526 | } |
| 527 | if ((mask & ATTR_GID) && XFS_IS_GQUOTA_ON(mp)) { |
| 528 | gid = iattr->ia_gid; |
| 529 | qflags |= XFS_QMOPT_GQUOTA; |
| 530 | } else { |
| 531 | gid = ip->i_d.di_gid; |
| 532 | } |
| 533 | |
| 534 | /* |
| 535 | * We take a reference when we initialize udqp and gdqp, |
| 536 | * so it is important that we never blindly double trip on |
| 537 | * the same variable. See xfs_create() for an example. |
| 538 | */ |
| 539 | ASSERT(udqp == NULL); |
| 540 | ASSERT(gdqp == NULL); |
| 541 | error = xfs_qm_vop_dqalloc(ip, uid, gid, xfs_get_projid(ip), |
Chandra Seetharaman | 92f8ff7 | 2013-07-11 00:00:40 -0500 | [diff] [blame^] | 542 | qflags, &udqp, &gdqp, NULL); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 543 | if (error) |
| 544 | return error; |
| 545 | } |
| 546 | |
| 547 | tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE); |
| 548 | error = xfs_trans_reserve(tp, 0, XFS_ICHANGE_LOG_RES(mp), 0, 0, 0); |
| 549 | if (error) |
| 550 | goto out_dqrele; |
| 551 | |
| 552 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
| 553 | |
| 554 | /* |
| 555 | * Change file ownership. Must be the owner or privileged. |
| 556 | */ |
| 557 | if (mask & (ATTR_UID|ATTR_GID)) { |
| 558 | /* |
| 559 | * These IDs could have changed since we last looked at them. |
| 560 | * But, we're assured that if the ownership did change |
| 561 | * while we didn't have the inode locked, inode's dquot(s) |
| 562 | * would have changed also. |
| 563 | */ |
| 564 | iuid = ip->i_d.di_uid; |
| 565 | igid = ip->i_d.di_gid; |
| 566 | gid = (mask & ATTR_GID) ? iattr->ia_gid : igid; |
| 567 | uid = (mask & ATTR_UID) ? iattr->ia_uid : iuid; |
| 568 | |
| 569 | /* |
| 570 | * Do a quota reservation only if uid/gid is actually |
| 571 | * going to change. |
| 572 | */ |
| 573 | if (XFS_IS_QUOTA_RUNNING(mp) && |
| 574 | ((XFS_IS_UQUOTA_ON(mp) && iuid != uid) || |
| 575 | (XFS_IS_GQUOTA_ON(mp) && igid != gid))) { |
| 576 | ASSERT(tp); |
| 577 | error = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp, |
Chandra Seetharaman | 92f8ff7 | 2013-07-11 00:00:40 -0500 | [diff] [blame^] | 578 | NULL, capable(CAP_FOWNER) ? |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 579 | XFS_QMOPT_FORCE_RES : 0); |
| 580 | if (error) /* out of quota */ |
| 581 | goto out_trans_cancel; |
| 582 | } |
| 583 | } |
| 584 | |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 585 | xfs_trans_ijoin(tp, ip, 0); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 586 | |
| 587 | /* |
| 588 | * Change file ownership. Must be the owner or privileged. |
| 589 | */ |
| 590 | if (mask & (ATTR_UID|ATTR_GID)) { |
| 591 | /* |
| 592 | * CAP_FSETID overrides the following restrictions: |
| 593 | * |
| 594 | * The set-user-ID and set-group-ID bits of a file will be |
| 595 | * cleared upon successful return from chown() |
| 596 | */ |
| 597 | if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) && |
| 598 | !capable(CAP_FSETID)) |
| 599 | ip->i_d.di_mode &= ~(S_ISUID|S_ISGID); |
| 600 | |
| 601 | /* |
| 602 | * Change the ownerships and register quota modifications |
| 603 | * in the transaction. |
| 604 | */ |
| 605 | if (iuid != uid) { |
| 606 | if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_UQUOTA_ON(mp)) { |
| 607 | ASSERT(mask & ATTR_UID); |
| 608 | ASSERT(udqp); |
| 609 | olddquot1 = xfs_qm_vop_chown(tp, ip, |
| 610 | &ip->i_udquot, udqp); |
| 611 | } |
| 612 | ip->i_d.di_uid = uid; |
| 613 | inode->i_uid = uid; |
| 614 | } |
| 615 | if (igid != gid) { |
| 616 | if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_GQUOTA_ON(mp)) { |
| 617 | ASSERT(!XFS_IS_PQUOTA_ON(mp)); |
| 618 | ASSERT(mask & ATTR_GID); |
| 619 | ASSERT(gdqp); |
| 620 | olddquot2 = xfs_qm_vop_chown(tp, ip, |
| 621 | &ip->i_gdquot, gdqp); |
| 622 | } |
| 623 | ip->i_d.di_gid = gid; |
| 624 | inode->i_gid = gid; |
| 625 | } |
| 626 | } |
| 627 | |
| 628 | /* |
| 629 | * Change file access modes. |
| 630 | */ |
Dave Chinner | 56c19e8 | 2013-05-27 16:38:25 +1000 | [diff] [blame] | 631 | if (mask & ATTR_MODE) |
| 632 | xfs_setattr_mode(tp, ip, iattr); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 633 | |
| 634 | /* |
| 635 | * Change file access or modified times. |
| 636 | */ |
| 637 | if (mask & ATTR_ATIME) { |
| 638 | inode->i_atime = iattr->ia_atime; |
| 639 | ip->i_d.di_atime.t_sec = iattr->ia_atime.tv_sec; |
| 640 | ip->i_d.di_atime.t_nsec = iattr->ia_atime.tv_nsec; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 641 | } |
| 642 | if (mask & ATTR_CTIME) { |
| 643 | inode->i_ctime = iattr->ia_ctime; |
| 644 | ip->i_d.di_ctime.t_sec = iattr->ia_ctime.tv_sec; |
| 645 | ip->i_d.di_ctime.t_nsec = iattr->ia_ctime.tv_nsec; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 646 | } |
| 647 | if (mask & ATTR_MTIME) { |
| 648 | inode->i_mtime = iattr->ia_mtime; |
| 649 | ip->i_d.di_mtime.t_sec = iattr->ia_mtime.tv_sec; |
| 650 | ip->i_d.di_mtime.t_nsec = iattr->ia_mtime.tv_nsec; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 651 | } |
| 652 | |
| 653 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| 654 | |
| 655 | XFS_STATS_INC(xs_ig_attrchg); |
| 656 | |
| 657 | if (mp->m_flags & XFS_MOUNT_WSYNC) |
| 658 | xfs_trans_set_sync(tp); |
| 659 | error = xfs_trans_commit(tp, 0); |
| 660 | |
| 661 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| 662 | |
| 663 | /* |
| 664 | * Release any dquot(s) the inode had kept before chown. |
| 665 | */ |
| 666 | xfs_qm_dqrele(olddquot1); |
| 667 | xfs_qm_dqrele(olddquot2); |
| 668 | xfs_qm_dqrele(udqp); |
| 669 | xfs_qm_dqrele(gdqp); |
| 670 | |
| 671 | if (error) |
| 672 | return XFS_ERROR(error); |
| 673 | |
| 674 | /* |
| 675 | * XXX(hch): Updating the ACL entries is not atomic vs the i_mode |
| 676 | * update. We could avoid this with linked transactions |
| 677 | * and passing down the transaction pointer all the way |
| 678 | * to attr_set. No previous user of the generic |
| 679 | * Posix ACL code seems to care about this issue either. |
| 680 | */ |
| 681 | if ((mask & ATTR_MODE) && !(flags & XFS_ATTR_NOACL)) { |
| 682 | error = -xfs_acl_chmod(inode); |
| 683 | if (error) |
| 684 | return XFS_ERROR(error); |
| 685 | } |
| 686 | |
| 687 | return 0; |
| 688 | |
| 689 | out_trans_cancel: |
| 690 | xfs_trans_cancel(tp, 0); |
| 691 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| 692 | out_dqrele: |
| 693 | xfs_qm_dqrele(udqp); |
| 694 | xfs_qm_dqrele(gdqp); |
| 695 | return error; |
| 696 | } |
| 697 | |
| 698 | /* |
| 699 | * Truncate file. Must have write permission and not be a directory. |
| 700 | */ |
| 701 | int |
| 702 | xfs_setattr_size( |
| 703 | struct xfs_inode *ip, |
| 704 | struct iattr *iattr, |
| 705 | int flags) |
| 706 | { |
| 707 | struct xfs_mount *mp = ip->i_mount; |
| 708 | struct inode *inode = VFS_I(ip); |
| 709 | int mask = iattr->ia_valid; |
Christoph Hellwig | 673e8e5 | 2011-12-18 20:00:04 +0000 | [diff] [blame] | 710 | xfs_off_t oldsize, newsize; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 711 | struct xfs_trans *tp; |
| 712 | int error; |
Christoph Hellwig | f38996f | 2012-03-27 10:34:48 -0400 | [diff] [blame] | 713 | uint lock_flags = 0; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 714 | uint commit_flags = 0; |
| 715 | |
| 716 | trace_xfs_setattr(ip); |
| 717 | |
| 718 | if (mp->m_flags & XFS_MOUNT_RDONLY) |
| 719 | return XFS_ERROR(EROFS); |
| 720 | |
| 721 | if (XFS_FORCED_SHUTDOWN(mp)) |
| 722 | return XFS_ERROR(EIO); |
| 723 | |
| 724 | error = -inode_change_ok(inode, iattr); |
| 725 | if (error) |
| 726 | return XFS_ERROR(error); |
| 727 | |
| 728 | ASSERT(S_ISREG(ip->i_d.di_mode)); |
Dave Chinner | 56c19e8 | 2013-05-27 16:38:25 +1000 | [diff] [blame] | 729 | ASSERT((mask & (ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_ATIME_SET| |
| 730 | ATTR_MTIME_SET|ATTR_KILL_PRIV|ATTR_TIMES_SET)) == 0); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 731 | |
Christoph Hellwig | f38996f | 2012-03-27 10:34:48 -0400 | [diff] [blame] | 732 | if (!(flags & XFS_ATTR_NOLOCK)) { |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 733 | lock_flags |= XFS_IOLOCK_EXCL; |
Christoph Hellwig | f38996f | 2012-03-27 10:34:48 -0400 | [diff] [blame] | 734 | xfs_ilock(ip, lock_flags); |
| 735 | } |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 736 | |
Christoph Hellwig | ce7ae151 | 2011-12-18 20:00:11 +0000 | [diff] [blame] | 737 | oldsize = inode->i_size; |
Christoph Hellwig | 673e8e5 | 2011-12-18 20:00:04 +0000 | [diff] [blame] | 738 | newsize = iattr->ia_size; |
| 739 | |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 740 | /* |
| 741 | * Short circuit the truncate case for zero length files. |
| 742 | */ |
Christoph Hellwig | 673e8e5 | 2011-12-18 20:00:04 +0000 | [diff] [blame] | 743 | if (newsize == 0 && oldsize == 0 && ip->i_d.di_nextents == 0) { |
Christoph Hellwig | 681b120 | 2011-07-08 14:34:26 +0200 | [diff] [blame] | 744 | if (!(mask & (ATTR_CTIME|ATTR_MTIME))) |
| 745 | goto out_unlock; |
| 746 | |
| 747 | /* |
| 748 | * Use the regular setattr path to update the timestamps. |
| 749 | */ |
| 750 | xfs_iunlock(ip, lock_flags); |
| 751 | iattr->ia_valid &= ~ATTR_SIZE; |
| 752 | return xfs_setattr_nonsize(ip, iattr, 0); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 753 | } |
| 754 | |
| 755 | /* |
| 756 | * Make sure that the dquots are attached to the inode. |
| 757 | */ |
Christoph Hellwig | f38996f | 2012-03-27 10:34:48 -0400 | [diff] [blame] | 758 | error = xfs_qm_dqattach(ip, 0); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 759 | if (error) |
| 760 | goto out_unlock; |
| 761 | |
| 762 | /* |
| 763 | * Now we can make the changes. Before we join the inode to the |
| 764 | * transaction, take care of the part of the truncation that must be |
| 765 | * done without the inode lock. This needs to be done before joining |
| 766 | * the inode to the transaction, because the inode cannot be unlocked |
| 767 | * once it is a part of the transaction. |
| 768 | */ |
Christoph Hellwig | 673e8e5 | 2011-12-18 20:00:04 +0000 | [diff] [blame] | 769 | if (newsize > oldsize) { |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 770 | /* |
| 771 | * Do the first part of growing a file: zero any data in the |
| 772 | * last block that is beyond the old EOF. We need to do this |
| 773 | * before the inode is joined to the transaction to modify |
| 774 | * i_size. |
| 775 | */ |
Christoph Hellwig | 673e8e5 | 2011-12-18 20:00:04 +0000 | [diff] [blame] | 776 | error = xfs_zero_eof(ip, newsize, oldsize); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 777 | if (error) |
| 778 | goto out_unlock; |
| 779 | } |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 780 | |
| 781 | /* |
| 782 | * We are going to log the inode size change in this transaction so |
| 783 | * any previous writes that are beyond the on disk EOF and the new |
| 784 | * EOF that have not been written out need to be written here. If we |
| 785 | * do not write the data out, we expose ourselves to the null files |
| 786 | * problem. |
| 787 | * |
| 788 | * Only flush from the on disk size to the smaller of the in memory |
| 789 | * file size or the new size as that's the range we really care about |
| 790 | * here and prevents waiting for other data not within the range we |
| 791 | * care about here. |
| 792 | */ |
Christoph Hellwig | 673e8e5 | 2011-12-18 20:00:04 +0000 | [diff] [blame] | 793 | if (oldsize != ip->i_d.di_size && newsize > ip->i_d.di_size) { |
Dave Chinner | 4bc1ea6 | 2012-11-12 22:53:56 +1100 | [diff] [blame] | 794 | error = -filemap_write_and_wait_range(VFS_I(ip)->i_mapping, |
| 795 | ip->i_d.di_size, newsize); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 796 | if (error) |
| 797 | goto out_unlock; |
| 798 | } |
| 799 | |
| 800 | /* |
Christoph Hellwig | 4a06fd2 | 2011-08-23 08:28:13 +0000 | [diff] [blame] | 801 | * Wait for all direct I/O to complete. |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 802 | */ |
Christoph Hellwig | 4a06fd2 | 2011-08-23 08:28:13 +0000 | [diff] [blame] | 803 | inode_dio_wait(inode); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 804 | |
Christoph Hellwig | 673e8e5 | 2011-12-18 20:00:04 +0000 | [diff] [blame] | 805 | error = -block_truncate_page(inode->i_mapping, newsize, xfs_get_blocks); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 806 | if (error) |
| 807 | goto out_unlock; |
| 808 | |
| 809 | tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_SIZE); |
| 810 | error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0, |
| 811 | XFS_TRANS_PERM_LOG_RES, |
| 812 | XFS_ITRUNCATE_LOG_COUNT); |
| 813 | if (error) |
| 814 | goto out_trans_cancel; |
| 815 | |
Christoph Hellwig | 673e8e5 | 2011-12-18 20:00:04 +0000 | [diff] [blame] | 816 | truncate_setsize(inode, newsize); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 817 | |
| 818 | commit_flags = XFS_TRANS_RELEASE_LOG_RES; |
| 819 | lock_flags |= XFS_ILOCK_EXCL; |
| 820 | |
| 821 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
| 822 | |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 823 | xfs_trans_ijoin(tp, ip, 0); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 824 | |
| 825 | /* |
| 826 | * Only change the c/mtime if we are changing the size or we are |
| 827 | * explicitly asked to change it. This handles the semantic difference |
| 828 | * between truncate() and ftruncate() as implemented in the VFS. |
| 829 | * |
| 830 | * The regular truncate() case without ATTR_CTIME and ATTR_MTIME is a |
| 831 | * special case where we need to update the times despite not having |
| 832 | * these flags set. For all other operations the VFS set these flags |
| 833 | * explicitly if it wants a timestamp update. |
| 834 | */ |
Christoph Hellwig | 673e8e5 | 2011-12-18 20:00:04 +0000 | [diff] [blame] | 835 | if (newsize != oldsize && (!(mask & (ATTR_CTIME | ATTR_MTIME)))) { |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 836 | iattr->ia_ctime = iattr->ia_mtime = |
| 837 | current_fs_time(inode->i_sb); |
| 838 | mask |= ATTR_CTIME | ATTR_MTIME; |
| 839 | } |
| 840 | |
Christoph Hellwig | 673e8e5 | 2011-12-18 20:00:04 +0000 | [diff] [blame] | 841 | /* |
| 842 | * The first thing we do is set the size to new_size permanently on |
| 843 | * disk. This way we don't have to worry about anyone ever being able |
| 844 | * to look at the data being freed even in the face of a crash. |
| 845 | * What we're getting around here is the case where we free a block, it |
| 846 | * is allocated to another file, it is written to, and then we crash. |
| 847 | * If the new data gets written to the file but the log buffers |
| 848 | * containing the free and reallocation don't, then we'd end up with |
| 849 | * garbage in the blocks being freed. As long as we make the new size |
| 850 | * permanent before actually freeing any blocks it doesn't matter if |
| 851 | * they get written to. |
| 852 | */ |
| 853 | ip->i_d.di_size = newsize; |
Christoph Hellwig | 673e8e5 | 2011-12-18 20:00:04 +0000 | [diff] [blame] | 854 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| 855 | |
| 856 | if (newsize <= oldsize) { |
| 857 | error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, newsize); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 858 | if (error) |
| 859 | goto out_trans_abort; |
| 860 | |
| 861 | /* |
| 862 | * Truncated "down", so we're removing references to old data |
| 863 | * here - if we delay flushing for a long time, we expose |
| 864 | * ourselves unduly to the notorious NULL files problem. So, |
| 865 | * we mark this inode and flush it when the file is closed, |
| 866 | * and do not wait the usual (long) time for writeout. |
| 867 | */ |
| 868 | xfs_iflags_set(ip, XFS_ITRUNCATED); |
Brian Foster | 27b5286 | 2012-11-06 09:50:38 -0500 | [diff] [blame] | 869 | |
| 870 | /* A truncate down always removes post-EOF blocks. */ |
| 871 | xfs_inode_clear_eofblocks_tag(ip); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 872 | } |
| 873 | |
Dave Chinner | 56c19e8 | 2013-05-27 16:38:25 +1000 | [diff] [blame] | 874 | /* |
| 875 | * Change file access modes. |
| 876 | */ |
| 877 | if (mask & ATTR_MODE) |
| 878 | xfs_setattr_mode(tp, ip, iattr); |
| 879 | |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 880 | if (mask & ATTR_CTIME) { |
| 881 | inode->i_ctime = iattr->ia_ctime; |
| 882 | ip->i_d.di_ctime.t_sec = iattr->ia_ctime.tv_sec; |
| 883 | ip->i_d.di_ctime.t_nsec = iattr->ia_ctime.tv_nsec; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 884 | } |
| 885 | if (mask & ATTR_MTIME) { |
| 886 | inode->i_mtime = iattr->ia_mtime; |
| 887 | ip->i_d.di_mtime.t_sec = iattr->ia_mtime.tv_sec; |
| 888 | ip->i_d.di_mtime.t_nsec = iattr->ia_mtime.tv_nsec; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 889 | } |
| 890 | |
| 891 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| 892 | |
| 893 | XFS_STATS_INC(xs_ig_attrchg); |
| 894 | |
| 895 | if (mp->m_flags & XFS_MOUNT_WSYNC) |
| 896 | xfs_trans_set_sync(tp); |
| 897 | |
| 898 | error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES); |
| 899 | out_unlock: |
| 900 | if (lock_flags) |
| 901 | xfs_iunlock(ip, lock_flags); |
| 902 | return error; |
| 903 | |
| 904 | out_trans_abort: |
| 905 | commit_flags |= XFS_TRANS_ABORT; |
| 906 | out_trans_cancel: |
| 907 | xfs_trans_cancel(tp, commit_flags); |
| 908 | goto out_unlock; |
| 909 | } |
| 910 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | STATIC int |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 912 | xfs_vn_setattr( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 913 | struct dentry *dentry, |
Christoph Hellwig | 0f285c8 | 2008-07-18 17:13:28 +1000 | [diff] [blame] | 914 | struct iattr *iattr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 915 | { |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 916 | if (iattr->ia_valid & ATTR_SIZE) |
| 917 | return -xfs_setattr_size(XFS_I(dentry->d_inode), iattr, 0); |
| 918 | return -xfs_setattr_nonsize(XFS_I(dentry->d_inode), iattr, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 919 | } |
| 920 | |
Christoph Hellwig | 69ff282 | 2012-06-06 17:01:28 -0400 | [diff] [blame] | 921 | STATIC int |
| 922 | xfs_vn_update_time( |
| 923 | struct inode *inode, |
| 924 | struct timespec *now, |
| 925 | int flags) |
| 926 | { |
| 927 | struct xfs_inode *ip = XFS_I(inode); |
| 928 | struct xfs_mount *mp = ip->i_mount; |
| 929 | struct xfs_trans *tp; |
| 930 | int error; |
| 931 | |
| 932 | trace_xfs_update_time(ip); |
| 933 | |
| 934 | tp = xfs_trans_alloc(mp, XFS_TRANS_FSYNC_TS); |
| 935 | error = xfs_trans_reserve(tp, 0, XFS_FSYNC_TS_LOG_RES(mp), 0, 0, 0); |
| 936 | if (error) { |
| 937 | xfs_trans_cancel(tp, 0); |
| 938 | return -error; |
| 939 | } |
| 940 | |
| 941 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
| 942 | if (flags & S_CTIME) { |
| 943 | inode->i_ctime = *now; |
| 944 | ip->i_d.di_ctime.t_sec = (__int32_t)now->tv_sec; |
| 945 | ip->i_d.di_ctime.t_nsec = (__int32_t)now->tv_nsec; |
| 946 | } |
| 947 | if (flags & S_MTIME) { |
| 948 | inode->i_mtime = *now; |
| 949 | ip->i_d.di_mtime.t_sec = (__int32_t)now->tv_sec; |
| 950 | ip->i_d.di_mtime.t_nsec = (__int32_t)now->tv_nsec; |
| 951 | } |
| 952 | if (flags & S_ATIME) { |
| 953 | inode->i_atime = *now; |
| 954 | ip->i_d.di_atime.t_sec = (__int32_t)now->tv_sec; |
| 955 | ip->i_d.di_atime.t_nsec = (__int32_t)now->tv_nsec; |
| 956 | } |
| 957 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
| 958 | xfs_trans_log_inode(tp, ip, XFS_ILOG_TIMESTAMP); |
| 959 | return -xfs_trans_commit(tp, 0); |
| 960 | } |
| 961 | |
Eric Sandeen | f35642e | 2008-11-28 14:23:35 +1100 | [diff] [blame] | 962 | #define XFS_FIEMAP_FLAGS (FIEMAP_FLAG_SYNC|FIEMAP_FLAG_XATTR) |
| 963 | |
| 964 | /* |
| 965 | * Call fiemap helper to fill in user data. |
| 966 | * Returns positive errors to xfs_getbmap. |
| 967 | */ |
| 968 | STATIC int |
| 969 | xfs_fiemap_format( |
| 970 | void **arg, |
| 971 | struct getbmapx *bmv, |
| 972 | int *full) |
| 973 | { |
| 974 | int error; |
| 975 | struct fiemap_extent_info *fieinfo = *arg; |
| 976 | u32 fiemap_flags = 0; |
| 977 | u64 logical, physical, length; |
| 978 | |
| 979 | /* Do nothing for a hole */ |
| 980 | if (bmv->bmv_block == -1LL) |
| 981 | return 0; |
| 982 | |
| 983 | logical = BBTOB(bmv->bmv_offset); |
| 984 | physical = BBTOB(bmv->bmv_block); |
| 985 | length = BBTOB(bmv->bmv_length); |
| 986 | |
| 987 | if (bmv->bmv_oflags & BMV_OF_PREALLOC) |
| 988 | fiemap_flags |= FIEMAP_EXTENT_UNWRITTEN; |
| 989 | else if (bmv->bmv_oflags & BMV_OF_DELALLOC) { |
Jie Liu | 635c4d0 | 2013-06-06 06:24:01 -0700 | [diff] [blame] | 990 | fiemap_flags |= (FIEMAP_EXTENT_DELALLOC | |
| 991 | FIEMAP_EXTENT_UNKNOWN); |
Eric Sandeen | f35642e | 2008-11-28 14:23:35 +1100 | [diff] [blame] | 992 | physical = 0; /* no block yet */ |
| 993 | } |
| 994 | if (bmv->bmv_oflags & BMV_OF_LAST) |
| 995 | fiemap_flags |= FIEMAP_EXTENT_LAST; |
| 996 | |
| 997 | error = fiemap_fill_next_extent(fieinfo, logical, physical, |
| 998 | length, fiemap_flags); |
| 999 | if (error > 0) { |
| 1000 | error = 0; |
| 1001 | *full = 1; /* user array now full */ |
| 1002 | } |
| 1003 | |
| 1004 | return -error; |
| 1005 | } |
| 1006 | |
| 1007 | STATIC int |
| 1008 | xfs_vn_fiemap( |
| 1009 | struct inode *inode, |
| 1010 | struct fiemap_extent_info *fieinfo, |
| 1011 | u64 start, |
| 1012 | u64 length) |
| 1013 | { |
| 1014 | xfs_inode_t *ip = XFS_I(inode); |
| 1015 | struct getbmapx bm; |
| 1016 | int error; |
| 1017 | |
| 1018 | error = fiemap_check_flags(fieinfo, XFS_FIEMAP_FLAGS); |
| 1019 | if (error) |
| 1020 | return error; |
| 1021 | |
| 1022 | /* Set up bmap header for xfs internal routine */ |
| 1023 | bm.bmv_offset = BTOBB(start); |
| 1024 | /* Special case for whole file */ |
| 1025 | if (length == FIEMAP_MAX_OFFSET) |
| 1026 | bm.bmv_length = -1LL; |
| 1027 | else |
| 1028 | bm.bmv_length = BTOBB(length); |
| 1029 | |
Eric Sandeen | 97db39a | 2009-07-26 21:52:01 -0500 | [diff] [blame] | 1030 | /* We add one because in getbmap world count includes the header */ |
Tao Ma | 2d1ff3c | 2010-04-29 15:13:56 +1000 | [diff] [blame] | 1031 | bm.bmv_count = !fieinfo->fi_extents_max ? MAXEXTNUM : |
| 1032 | fieinfo->fi_extents_max + 1; |
| 1033 | bm.bmv_count = min_t(__s32, bm.bmv_count, |
| 1034 | (PAGE_SIZE * 16 / sizeof(struct getbmapx))); |
Tao Ma | 9af2546 | 2010-08-30 02:44:03 +0000 | [diff] [blame] | 1035 | bm.bmv_iflags = BMV_IF_PREALLOC | BMV_IF_NO_HOLES; |
Eric Sandeen | f35642e | 2008-11-28 14:23:35 +1100 | [diff] [blame] | 1036 | if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) |
| 1037 | bm.bmv_iflags |= BMV_IF_ATTRFORK; |
| 1038 | if (!(fieinfo->fi_flags & FIEMAP_FLAG_SYNC)) |
| 1039 | bm.bmv_iflags |= BMV_IF_DELALLOC; |
| 1040 | |
| 1041 | error = xfs_getbmap(ip, &bm, xfs_fiemap_format, fieinfo); |
| 1042 | if (error) |
| 1043 | return -error; |
| 1044 | |
| 1045 | return 0; |
| 1046 | } |
| 1047 | |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1048 | static const struct inode_operations xfs_inode_operations = { |
Christoph Hellwig | 4e34e71 | 2011-07-23 17:37:31 +0200 | [diff] [blame] | 1049 | .get_acl = xfs_get_acl, |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 1050 | .getattr = xfs_vn_getattr, |
| 1051 | .setattr = xfs_vn_setattr, |
Lachlan McIlroy | 0ec5851 | 2008-06-23 13:23:01 +1000 | [diff] [blame] | 1052 | .setxattr = generic_setxattr, |
| 1053 | .getxattr = generic_getxattr, |
| 1054 | .removexattr = generic_removexattr, |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 1055 | .listxattr = xfs_vn_listxattr, |
Eric Sandeen | f35642e | 2008-11-28 14:23:35 +1100 | [diff] [blame] | 1056 | .fiemap = xfs_vn_fiemap, |
Christoph Hellwig | 69ff282 | 2012-06-06 17:01:28 -0400 | [diff] [blame] | 1057 | .update_time = xfs_vn_update_time, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1058 | }; |
| 1059 | |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1060 | static const struct inode_operations xfs_dir_inode_operations = { |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 1061 | .create = xfs_vn_create, |
| 1062 | .lookup = xfs_vn_lookup, |
| 1063 | .link = xfs_vn_link, |
| 1064 | .unlink = xfs_vn_unlink, |
| 1065 | .symlink = xfs_vn_symlink, |
| 1066 | .mkdir = xfs_vn_mkdir, |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1067 | /* |
| 1068 | * Yes, XFS uses the same method for rmdir and unlink. |
| 1069 | * |
| 1070 | * There are some subtile differences deeper in the code, |
| 1071 | * but we use S_ISDIR to check for those. |
| 1072 | */ |
| 1073 | .rmdir = xfs_vn_unlink, |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 1074 | .mknod = xfs_vn_mknod, |
| 1075 | .rename = xfs_vn_rename, |
Christoph Hellwig | 4e34e71 | 2011-07-23 17:37:31 +0200 | [diff] [blame] | 1076 | .get_acl = xfs_get_acl, |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 1077 | .getattr = xfs_vn_getattr, |
| 1078 | .setattr = xfs_vn_setattr, |
Lachlan McIlroy | 0ec5851 | 2008-06-23 13:23:01 +1000 | [diff] [blame] | 1079 | .setxattr = generic_setxattr, |
| 1080 | .getxattr = generic_getxattr, |
| 1081 | .removexattr = generic_removexattr, |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 1082 | .listxattr = xfs_vn_listxattr, |
Christoph Hellwig | 69ff282 | 2012-06-06 17:01:28 -0400 | [diff] [blame] | 1083 | .update_time = xfs_vn_update_time, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1084 | }; |
| 1085 | |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1086 | static const struct inode_operations xfs_dir_ci_inode_operations = { |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 1087 | .create = xfs_vn_create, |
| 1088 | .lookup = xfs_vn_ci_lookup, |
| 1089 | .link = xfs_vn_link, |
| 1090 | .unlink = xfs_vn_unlink, |
| 1091 | .symlink = xfs_vn_symlink, |
| 1092 | .mkdir = xfs_vn_mkdir, |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1093 | /* |
| 1094 | * Yes, XFS uses the same method for rmdir and unlink. |
| 1095 | * |
| 1096 | * There are some subtile differences deeper in the code, |
| 1097 | * but we use S_ISDIR to check for those. |
| 1098 | */ |
| 1099 | .rmdir = xfs_vn_unlink, |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 1100 | .mknod = xfs_vn_mknod, |
| 1101 | .rename = xfs_vn_rename, |
Christoph Hellwig | 4e34e71 | 2011-07-23 17:37:31 +0200 | [diff] [blame] | 1102 | .get_acl = xfs_get_acl, |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 1103 | .getattr = xfs_vn_getattr, |
| 1104 | .setattr = xfs_vn_setattr, |
Lachlan McIlroy | 0ec5851 | 2008-06-23 13:23:01 +1000 | [diff] [blame] | 1105 | .setxattr = generic_setxattr, |
| 1106 | .getxattr = generic_getxattr, |
| 1107 | .removexattr = generic_removexattr, |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 1108 | .listxattr = xfs_vn_listxattr, |
Christoph Hellwig | 69ff282 | 2012-06-06 17:01:28 -0400 | [diff] [blame] | 1109 | .update_time = xfs_vn_update_time, |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 1110 | }; |
| 1111 | |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1112 | static const struct inode_operations xfs_symlink_inode_operations = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1113 | .readlink = generic_readlink, |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 1114 | .follow_link = xfs_vn_follow_link, |
| 1115 | .put_link = xfs_vn_put_link, |
Christoph Hellwig | 4e34e71 | 2011-07-23 17:37:31 +0200 | [diff] [blame] | 1116 | .get_acl = xfs_get_acl, |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 1117 | .getattr = xfs_vn_getattr, |
| 1118 | .setattr = xfs_vn_setattr, |
Lachlan McIlroy | 0ec5851 | 2008-06-23 13:23:01 +1000 | [diff] [blame] | 1119 | .setxattr = generic_setxattr, |
| 1120 | .getxattr = generic_getxattr, |
| 1121 | .removexattr = generic_removexattr, |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 1122 | .listxattr = xfs_vn_listxattr, |
Christoph Hellwig | 69ff282 | 2012-06-06 17:01:28 -0400 | [diff] [blame] | 1123 | .update_time = xfs_vn_update_time, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1124 | }; |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1125 | |
| 1126 | STATIC void |
| 1127 | xfs_diflags_to_iflags( |
| 1128 | struct inode *inode, |
| 1129 | struct xfs_inode *ip) |
| 1130 | { |
| 1131 | if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE) |
| 1132 | inode->i_flags |= S_IMMUTABLE; |
| 1133 | else |
| 1134 | inode->i_flags &= ~S_IMMUTABLE; |
| 1135 | if (ip->i_d.di_flags & XFS_DIFLAG_APPEND) |
| 1136 | inode->i_flags |= S_APPEND; |
| 1137 | else |
| 1138 | inode->i_flags &= ~S_APPEND; |
| 1139 | if (ip->i_d.di_flags & XFS_DIFLAG_SYNC) |
| 1140 | inode->i_flags |= S_SYNC; |
| 1141 | else |
| 1142 | inode->i_flags &= ~S_SYNC; |
| 1143 | if (ip->i_d.di_flags & XFS_DIFLAG_NOATIME) |
| 1144 | inode->i_flags |= S_NOATIME; |
| 1145 | else |
| 1146 | inode->i_flags &= ~S_NOATIME; |
| 1147 | } |
| 1148 | |
| 1149 | /* |
| 1150 | * Initialize the Linux inode, set up the operation vectors and |
| 1151 | * unlock the inode. |
| 1152 | * |
| 1153 | * When reading existing inodes from disk this is called directly |
| 1154 | * from xfs_iget, when creating a new inode it is called from |
| 1155 | * xfs_ialloc after setting up the inode. |
David Chinner | bf90424 | 2008-10-30 17:36:14 +1100 | [diff] [blame] | 1156 | * |
| 1157 | * We are always called with an uninitialised linux inode here. |
| 1158 | * We need to initialise the necessary fields and take a reference |
| 1159 | * on it. |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1160 | */ |
| 1161 | void |
| 1162 | xfs_setup_inode( |
| 1163 | struct xfs_inode *ip) |
| 1164 | { |
David Chinner | bf90424 | 2008-10-30 17:36:14 +1100 | [diff] [blame] | 1165 | struct inode *inode = &ip->i_vnode; |
| 1166 | |
| 1167 | inode->i_ino = ip->i_ino; |
Christoph Hellwig | eaff807 | 2009-12-17 14:25:01 +0100 | [diff] [blame] | 1168 | inode->i_state = I_NEW; |
Christoph Hellwig | 646ec46 | 2010-10-23 07:15:32 -0400 | [diff] [blame] | 1169 | |
| 1170 | inode_sb_list_add(inode); |
Christoph Hellwig | c6f6cd0 | 2010-11-06 11:43:08 +0000 | [diff] [blame] | 1171 | /* make the inode look hashed for the writeback code */ |
| 1172 | hlist_add_fake(&inode->i_hash); |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1173 | |
| 1174 | inode->i_mode = ip->i_d.di_mode; |
Miklos Szeredi | bfe8684 | 2011-10-28 14:13:29 +0200 | [diff] [blame] | 1175 | set_nlink(inode, ip->i_d.di_nlink); |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1176 | inode->i_uid = ip->i_d.di_uid; |
| 1177 | inode->i_gid = ip->i_d.di_gid; |
| 1178 | |
| 1179 | switch (inode->i_mode & S_IFMT) { |
| 1180 | case S_IFBLK: |
| 1181 | case S_IFCHR: |
| 1182 | inode->i_rdev = |
| 1183 | MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff, |
| 1184 | sysv_minor(ip->i_df.if_u2.if_rdev)); |
| 1185 | break; |
| 1186 | default: |
| 1187 | inode->i_rdev = 0; |
| 1188 | break; |
| 1189 | } |
| 1190 | |
| 1191 | inode->i_generation = ip->i_d.di_gen; |
| 1192 | i_size_write(inode, ip->i_d.di_size); |
| 1193 | inode->i_atime.tv_sec = ip->i_d.di_atime.t_sec; |
| 1194 | inode->i_atime.tv_nsec = ip->i_d.di_atime.t_nsec; |
| 1195 | inode->i_mtime.tv_sec = ip->i_d.di_mtime.t_sec; |
| 1196 | inode->i_mtime.tv_nsec = ip->i_d.di_mtime.t_nsec; |
| 1197 | inode->i_ctime.tv_sec = ip->i_d.di_ctime.t_sec; |
| 1198 | inode->i_ctime.tv_nsec = ip->i_d.di_ctime.t_nsec; |
| 1199 | xfs_diflags_to_iflags(inode, ip); |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1200 | |
| 1201 | switch (inode->i_mode & S_IFMT) { |
| 1202 | case S_IFREG: |
| 1203 | inode->i_op = &xfs_inode_operations; |
| 1204 | inode->i_fop = &xfs_file_operations; |
| 1205 | inode->i_mapping->a_ops = &xfs_address_space_operations; |
| 1206 | break; |
| 1207 | case S_IFDIR: |
| 1208 | if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb)) |
| 1209 | inode->i_op = &xfs_dir_ci_inode_operations; |
| 1210 | else |
| 1211 | inode->i_op = &xfs_dir_inode_operations; |
| 1212 | inode->i_fop = &xfs_dir_file_operations; |
| 1213 | break; |
| 1214 | case S_IFLNK: |
| 1215 | inode->i_op = &xfs_symlink_inode_operations; |
| 1216 | if (!(ip->i_df.if_flags & XFS_IFINLINE)) |
| 1217 | inode->i_mapping->a_ops = &xfs_address_space_operations; |
| 1218 | break; |
| 1219 | default: |
| 1220 | inode->i_op = &xfs_inode_operations; |
| 1221 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
| 1222 | break; |
| 1223 | } |
| 1224 | |
Christoph Hellwig | 510792e | 2011-07-26 15:07:29 +0000 | [diff] [blame] | 1225 | /* |
| 1226 | * If there is no attribute fork no ACL can exist on this inode, |
| 1227 | * and it can't have any file capabilities attached to it either. |
| 1228 | */ |
| 1229 | if (!XFS_IFORK_Q(ip)) { |
| 1230 | inode_has_no_xattr(inode); |
Christoph Hellwig | 6311b10 | 2011-07-23 17:36:50 +0200 | [diff] [blame] | 1231 | cache_no_acl(inode); |
Christoph Hellwig | 510792e | 2011-07-26 15:07:29 +0000 | [diff] [blame] | 1232 | } |
Christoph Hellwig | 6311b10 | 2011-07-23 17:36:50 +0200 | [diff] [blame] | 1233 | |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1234 | xfs_iflags_clear(ip, XFS_INEW); |
| 1235 | barrier(); |
| 1236 | |
| 1237 | unlock_new_inode(inode); |
| 1238 | } |