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" |
Dave Chinner | 70a9883c | 2013-10-23 10:36:05 +1100 | [diff] [blame] | 20 | #include "xfs_shared.h" |
Dave Chinner | 239880e | 2013-10-23 10:50:10 +1100 | [diff] [blame] | 21 | #include "xfs_format.h" |
| 22 | #include "xfs_log_format.h" |
| 23 | #include "xfs_trans_resv.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include "xfs_mount.h" |
Dave Chinner | 5706278 | 2013-10-15 09:17:51 +1100 | [diff] [blame] | 25 | #include "xfs_da_format.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 26 | #include "xfs_inode.h" |
| 27 | #include "xfs_bmap.h" |
Dave Chinner | 6898811 | 2013-08-12 20:49:42 +1000 | [diff] [blame] | 28 | #include "xfs_bmap_util.h" |
Dave Chinner | 239880e | 2013-10-23 10:50:10 +1100 | [diff] [blame] | 29 | #include "xfs_acl.h" |
Dave Chinner | 239880e | 2013-10-23 10:50:10 +1100 | [diff] [blame] | 30 | #include "xfs_quota.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 31 | #include "xfs_error.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include "xfs_attr.h" |
Dave Chinner | 239880e | 2013-10-23 10:50:10 +1100 | [diff] [blame] | 33 | #include "xfs_trans.h" |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 34 | #include "xfs_trace.h" |
Brian Foster | 27b5286 | 2012-11-06 09:50:38 -0500 | [diff] [blame] | 35 | #include "xfs_icache.h" |
Dave Chinner | c24b5df | 2013-08-12 20:49:45 +1000 | [diff] [blame] | 36 | #include "xfs_symlink.h" |
Dave Chinner | 0cb9776 | 2013-08-12 20:50:09 +1000 | [diff] [blame] | 37 | #include "xfs_da_btree.h" |
Dave Chinner | 1b767ee | 2014-12-04 09:43:17 +1100 | [diff] [blame] | 38 | #include "xfs_dir2.h" |
Zhi Yong Wu | 99b6436 | 2013-12-18 08:22:40 +0800 | [diff] [blame] | 39 | #include "xfs_trans_space.h" |
Christoph Hellwig | 781355c | 2015-02-16 11:59:50 +1100 | [diff] [blame] | 40 | #include "xfs_pnfs.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | |
Randy Dunlap | 16f7e0f | 2006-01-11 12:17:46 -0800 | [diff] [blame] | 42 | #include <linux/capability.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #include <linux/xattr.h> |
Christoph Hellwig | ef14f0c | 2009-06-10 17:07:47 +0200 | [diff] [blame] | 44 | #include <linux/posix_acl.h> |
Nathan Scott | 446ada4 | 2006-01-11 15:35:44 +1100 | [diff] [blame] | 45 | #include <linux/security.h> |
Eric Sandeen | f35642e | 2008-11-28 14:23:35 +1100 | [diff] [blame] | 46 | #include <linux/fiemap.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 47 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 48 | |
Dave Chinner | 93a8614 | 2014-02-27 16:51:39 +1100 | [diff] [blame] | 49 | /* |
| 50 | * Directories have different lock order w.r.t. mmap_sem compared to regular |
| 51 | * files. This is due to readdir potentially triggering page faults on a user |
| 52 | * buffer inside filldir(), and this happens with the ilock on the directory |
| 53 | * held. For regular files, the lock order is the other way around - the |
| 54 | * mmap_sem is taken during the page fault, and then we lock the ilock to do |
| 55 | * block mapping. Hence we need a different class for the directory ilock so |
| 56 | * that lockdep can tell them apart. |
| 57 | */ |
| 58 | static struct lock_class_key xfs_nondir_ilock_class; |
| 59 | static struct lock_class_key xfs_dir_ilock_class; |
| 60 | |
Dave Chinner | 8d2a5e6 | 2012-03-07 04:50:19 +0000 | [diff] [blame] | 61 | static int |
| 62 | xfs_initxattrs( |
| 63 | struct inode *inode, |
| 64 | const struct xattr *xattr_array, |
| 65 | void *fs_info) |
Mimi Zohar | 9d8f13b | 2011-06-06 15:29:25 -0400 | [diff] [blame] | 66 | { |
Dave Chinner | 8d2a5e6 | 2012-03-07 04:50:19 +0000 | [diff] [blame] | 67 | const struct xattr *xattr; |
| 68 | struct xfs_inode *ip = XFS_I(inode); |
| 69 | int error = 0; |
Mimi Zohar | 9d8f13b | 2011-06-06 15:29:25 -0400 | [diff] [blame] | 70 | |
| 71 | for (xattr = xattr_array; xattr->name != NULL; xattr++) { |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 72 | error = xfs_attr_set(ip, xattr->name, xattr->value, |
Dave Chinner | a5a14de | 2014-05-15 09:22:21 +1000 | [diff] [blame] | 73 | xattr->value_len, ATTR_SECURE); |
Mimi Zohar | 9d8f13b | 2011-06-06 15:29:25 -0400 | [diff] [blame] | 74 | if (error < 0) |
| 75 | break; |
| 76 | } |
| 77 | return error; |
| 78 | } |
| 79 | |
David Chinner | 5d51eff | 2007-11-23 16:29:18 +1100 | [diff] [blame] | 80 | /* |
Nathan Scott | 446ada4 | 2006-01-11 15:35:44 +1100 | [diff] [blame] | 81 | * Hook in SELinux. This is not quite correct yet, what we really need |
| 82 | * here (as we do for default ACLs) is a mechanism by which creation of |
| 83 | * these attrs can be journalled at inode creation time (along with the |
| 84 | * inode, of course, such that log replay can't cause these to be lost). |
| 85 | */ |
Mimi Zohar | 9d8f13b | 2011-06-06 15:29:25 -0400 | [diff] [blame] | 86 | |
Nathan Scott | 446ada4 | 2006-01-11 15:35:44 +1100 | [diff] [blame] | 87 | STATIC int |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 88 | xfs_init_security( |
Christoph Hellwig | af04819 | 2008-03-06 13:46:43 +1100 | [diff] [blame] | 89 | struct inode *inode, |
Eric Paris | 2a7dba3 | 2011-02-01 11:05:39 -0500 | [diff] [blame] | 90 | struct inode *dir, |
| 91 | const struct qstr *qstr) |
Nathan Scott | 446ada4 | 2006-01-11 15:35:44 +1100 | [diff] [blame] | 92 | { |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 93 | return security_inode_init_security(inode, dir, qstr, |
Dave Chinner | a5a14de | 2014-05-15 09:22:21 +1000 | [diff] [blame] | 94 | &xfs_initxattrs, NULL); |
Nathan Scott | 446ada4 | 2006-01-11 15:35:44 +1100 | [diff] [blame] | 95 | } |
| 96 | |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 97 | static void |
| 98 | xfs_dentry_to_name( |
| 99 | struct xfs_name *namep, |
Dave Chinner | 0cb9776 | 2013-08-12 20:50:09 +1000 | [diff] [blame] | 100 | struct dentry *dentry, |
| 101 | int mode) |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 102 | { |
| 103 | namep->name = dentry->d_name.name; |
| 104 | namep->len = dentry->d_name.len; |
Dave Chinner | 0cb9776 | 2013-08-12 20:50:09 +1000 | [diff] [blame] | 105 | namep->type = xfs_mode_to_ftype[(mode & S_IFMT) >> S_SHIFT]; |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 106 | } |
| 107 | |
David Chinner | 7989cb8 | 2007-02-10 18:34:56 +1100 | [diff] [blame] | 108 | STATIC void |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 109 | xfs_cleanup_inode( |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 110 | struct inode *dir, |
Christoph Hellwig | af04819 | 2008-03-06 13:46:43 +1100 | [diff] [blame] | 111 | struct inode *inode, |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 112 | struct dentry *dentry) |
Yingping Lu | 3a69c7d | 2006-02-01 12:14:34 +1100 | [diff] [blame] | 113 | { |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 114 | struct xfs_name teardown; |
Yingping Lu | 3a69c7d | 2006-02-01 12:14:34 +1100 | [diff] [blame] | 115 | |
| 116 | /* Oh, the horror. |
Nathan Scott | 220b528 | 2006-03-14 13:33:36 +1100 | [diff] [blame] | 117 | * If we can't add the ACL or we fail in |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 118 | * xfs_init_security we must back out. |
Yingping Lu | 3a69c7d | 2006-02-01 12:14:34 +1100 | [diff] [blame] | 119 | * ENOSPC can hit here, among other things. |
| 120 | */ |
Dave Chinner | 0cb9776 | 2013-08-12 20:50:09 +1000 | [diff] [blame] | 121 | xfs_dentry_to_name(&teardown, dentry, 0); |
Yingping Lu | 3a69c7d | 2006-02-01 12:14:34 +1100 | [diff] [blame] | 122 | |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 123 | xfs_remove(XFS_I(dir), &teardown, XFS_I(inode)); |
Yingping Lu | 3a69c7d | 2006-02-01 12:14:34 +1100 | [diff] [blame] | 124 | } |
| 125 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | STATIC int |
Brian Foster | d540e43 | 2014-05-06 07:34:28 +1000 | [diff] [blame] | 127 | xfs_generic_create( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | struct inode *dir, |
| 129 | struct dentry *dentry, |
Al Viro | 1a67aaf | 2011-07-26 01:52:52 -0400 | [diff] [blame] | 130 | umode_t mode, |
Brian Foster | d540e43 | 2014-05-06 07:34:28 +1000 | [diff] [blame] | 131 | dev_t rdev, |
| 132 | bool tmpfile) /* unnamed file */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | { |
Christoph Hellwig | db0bb7b | 2008-03-06 13:44:35 +1100 | [diff] [blame] | 134 | struct inode *inode; |
Christoph Hellwig | 979ebab | 2008-03-06 13:46:05 +1100 | [diff] [blame] | 135 | struct xfs_inode *ip = NULL; |
Christoph Hellwig | 2401dc2 | 2013-12-20 05:16:50 -0800 | [diff] [blame] | 136 | struct posix_acl *default_acl, *acl; |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 137 | struct xfs_name name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | int error; |
| 139 | |
| 140 | /* |
| 141 | * Irix uses Missed'em'V split, but doesn't want to see |
| 142 | * the upper 5 bits of (14bit) major. |
| 143 | */ |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 144 | if (S_ISCHR(mode) || S_ISBLK(mode)) { |
| 145 | if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff)) |
| 146 | return -EINVAL; |
| 147 | rdev = sysv_encode_dev(rdev); |
| 148 | } else { |
| 149 | rdev = 0; |
| 150 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 151 | |
Christoph Hellwig | 2401dc2 | 2013-12-20 05:16:50 -0800 | [diff] [blame] | 152 | error = posix_acl_create(dir, &mode, &default_acl, &acl); |
| 153 | if (error) |
| 154 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | |
Brian Foster | d540e43 | 2014-05-06 07:34:28 +1000 | [diff] [blame] | 156 | if (!tmpfile) { |
| 157 | xfs_dentry_to_name(&name, dentry, mode); |
| 158 | error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip); |
| 159 | } else { |
| 160 | error = xfs_create_tmpfile(XFS_I(dir), dentry, mode, &ip); |
| 161 | } |
Christoph Hellwig | db0bb7b | 2008-03-06 13:44:35 +1100 | [diff] [blame] | 162 | if (unlikely(error)) |
| 163 | goto out_free_acl; |
Nathan Scott | 446ada4 | 2006-01-11 15:35:44 +1100 | [diff] [blame] | 164 | |
David Chinner | 0165164 | 2008-08-13 15:45:15 +1000 | [diff] [blame] | 165 | inode = VFS_I(ip); |
Christoph Hellwig | 979ebab | 2008-03-06 13:46:05 +1100 | [diff] [blame] | 166 | |
Eric Paris | 2a7dba3 | 2011-02-01 11:05:39 -0500 | [diff] [blame] | 167 | error = xfs_init_security(inode, dir, &dentry->d_name); |
Christoph Hellwig | db0bb7b | 2008-03-06 13:44:35 +1100 | [diff] [blame] | 168 | if (unlikely(error)) |
| 169 | goto out_cleanup_inode; |
| 170 | |
Christoph Hellwig | 2401dc2 | 2013-12-20 05:16:50 -0800 | [diff] [blame] | 171 | #ifdef CONFIG_XFS_POSIX_ACL |
Christoph Hellwig | db0bb7b | 2008-03-06 13:44:35 +1100 | [diff] [blame] | 172 | if (default_acl) { |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 173 | error = xfs_set_acl(inode, default_acl, ACL_TYPE_DEFAULT); |
Christoph Hellwig | 2401dc2 | 2013-12-20 05:16:50 -0800 | [diff] [blame] | 174 | if (error) |
Christoph Hellwig | db0bb7b | 2008-03-06 13:44:35 +1100 | [diff] [blame] | 175 | goto out_cleanup_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 176 | } |
Christoph Hellwig | 2401dc2 | 2013-12-20 05:16:50 -0800 | [diff] [blame] | 177 | if (acl) { |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 178 | error = xfs_set_acl(inode, acl, ACL_TYPE_ACCESS); |
Christoph Hellwig | 2401dc2 | 2013-12-20 05:16:50 -0800 | [diff] [blame] | 179 | if (error) |
| 180 | goto out_cleanup_inode; |
| 181 | } |
| 182 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | |
Brian Foster | d540e43 | 2014-05-06 07:34:28 +1000 | [diff] [blame] | 184 | if (tmpfile) |
| 185 | d_tmpfile(dentry, inode); |
| 186 | else |
| 187 | d_instantiate(dentry, inode); |
| 188 | |
Dave Chinner | 58c9047 | 2015-02-23 22:38:08 +1100 | [diff] [blame] | 189 | xfs_finish_inode_setup(ip); |
| 190 | |
Christoph Hellwig | 2401dc2 | 2013-12-20 05:16:50 -0800 | [diff] [blame] | 191 | out_free_acl: |
| 192 | if (default_acl) |
| 193 | posix_acl_release(default_acl); |
| 194 | if (acl) |
| 195 | posix_acl_release(acl); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 196 | return error; |
Christoph Hellwig | db0bb7b | 2008-03-06 13:44:35 +1100 | [diff] [blame] | 197 | |
| 198 | out_cleanup_inode: |
Dave Chinner | 58c9047 | 2015-02-23 22:38:08 +1100 | [diff] [blame] | 199 | xfs_finish_inode_setup(ip); |
Brian Foster | d540e43 | 2014-05-06 07:34:28 +1000 | [diff] [blame] | 200 | if (!tmpfile) |
| 201 | xfs_cleanup_inode(dir, inode, dentry); |
| 202 | iput(inode); |
Christoph Hellwig | 2401dc2 | 2013-12-20 05:16:50 -0800 | [diff] [blame] | 203 | goto out_free_acl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 204 | } |
| 205 | |
| 206 | STATIC int |
Brian Foster | d540e43 | 2014-05-06 07:34:28 +1000 | [diff] [blame] | 207 | xfs_vn_mknod( |
| 208 | struct inode *dir, |
| 209 | struct dentry *dentry, |
| 210 | umode_t mode, |
| 211 | dev_t rdev) |
| 212 | { |
| 213 | return xfs_generic_create(dir, dentry, mode, rdev, false); |
| 214 | } |
| 215 | |
| 216 | STATIC int |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 217 | xfs_vn_create( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 218 | struct inode *dir, |
| 219 | struct dentry *dentry, |
Al Viro | 4acdaf2 | 2011-07-26 01:42:34 -0400 | [diff] [blame] | 220 | umode_t mode, |
Al Viro | ebfc3b4 | 2012-06-10 18:05:36 -0400 | [diff] [blame] | 221 | bool flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | { |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 223 | return xfs_vn_mknod(dir, dentry, mode, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | } |
| 225 | |
| 226 | STATIC int |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 227 | xfs_vn_mkdir( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 228 | struct inode *dir, |
| 229 | struct dentry *dentry, |
Al Viro | 18bb1db | 2011-07-26 01:41:39 -0400 | [diff] [blame] | 230 | umode_t mode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | { |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 232 | return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | } |
| 234 | |
| 235 | STATIC struct dentry * |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 236 | xfs_vn_lookup( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | struct inode *dir, |
| 238 | struct dentry *dentry, |
Al Viro | 00cd8dd | 2012-06-10 17:13:09 -0400 | [diff] [blame] | 239 | unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | { |
Christoph Hellwig | ef1f5e7 | 2008-03-06 13:46:25 +1100 | [diff] [blame] | 241 | struct xfs_inode *cip; |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 242 | struct xfs_name name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | int error; |
| 244 | |
| 245 | if (dentry->d_name.len >= MAXNAMELEN) |
| 246 | return ERR_PTR(-ENAMETOOLONG); |
| 247 | |
Dave Chinner | 0cb9776 | 2013-08-12 20:50:09 +1000 | [diff] [blame] | 248 | xfs_dentry_to_name(&name, dentry, 0); |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 249 | error = xfs_lookup(XFS_I(dir), &name, &cip, NULL); |
Nathan Scott | 67fcaa7 | 2006-06-09 17:00:52 +1000 | [diff] [blame] | 250 | if (unlikely(error)) { |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 251 | if (unlikely(error != -ENOENT)) |
| 252 | return ERR_PTR(error); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 253 | d_add(dentry, NULL); |
| 254 | return NULL; |
| 255 | } |
| 256 | |
David Chinner | 0165164 | 2008-08-13 15:45:15 +1000 | [diff] [blame] | 257 | return d_splice_alias(VFS_I(cip), dentry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 258 | } |
| 259 | |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 260 | STATIC struct dentry * |
| 261 | xfs_vn_ci_lookup( |
| 262 | struct inode *dir, |
| 263 | struct dentry *dentry, |
Al Viro | 00cd8dd | 2012-06-10 17:13:09 -0400 | [diff] [blame] | 264 | unsigned int flags) |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 265 | { |
| 266 | struct xfs_inode *ip; |
| 267 | struct xfs_name xname; |
| 268 | struct xfs_name ci_name; |
| 269 | struct qstr dname; |
| 270 | int error; |
| 271 | |
| 272 | if (dentry->d_name.len >= MAXNAMELEN) |
| 273 | return ERR_PTR(-ENAMETOOLONG); |
| 274 | |
Dave Chinner | 0cb9776 | 2013-08-12 20:50:09 +1000 | [diff] [blame] | 275 | xfs_dentry_to_name(&xname, dentry, 0); |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 276 | error = xfs_lookup(XFS_I(dir), &xname, &ip, &ci_name); |
| 277 | if (unlikely(error)) { |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 278 | if (unlikely(error != -ENOENT)) |
| 279 | return ERR_PTR(error); |
Barry Naujok | 866d5dc | 2008-05-22 17:21:40 +1000 | [diff] [blame] | 280 | /* |
| 281 | * call d_add(dentry, NULL) here when d_drop_negative_children |
| 282 | * is called in xfs_vn_mknod (ie. allow negative dentries |
| 283 | * with CI filesystems). |
| 284 | */ |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 285 | return NULL; |
| 286 | } |
| 287 | |
| 288 | /* if exact match, just splice and exit */ |
| 289 | if (!ci_name.name) |
David Chinner | 0165164 | 2008-08-13 15:45:15 +1000 | [diff] [blame] | 290 | return d_splice_alias(VFS_I(ip), dentry); |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 291 | |
| 292 | /* else case-insensitive match... */ |
| 293 | dname.name = ci_name.name; |
| 294 | dname.len = ci_name.len; |
Christoph Hellwig | e45b590 | 2008-08-07 23:49:07 +0200 | [diff] [blame] | 295 | dentry = d_add_ci(dentry, VFS_I(ip), &dname); |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 296 | kmem_free(ci_name.name); |
| 297 | return dentry; |
| 298 | } |
| 299 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | STATIC int |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 301 | xfs_vn_link( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | struct dentry *old_dentry, |
| 303 | struct inode *dir, |
| 304 | struct dentry *dentry) |
| 305 | { |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 306 | struct inode *inode = d_inode(old_dentry); |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 307 | struct xfs_name name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | int error; |
| 309 | |
Dave Chinner | 0cb9776 | 2013-08-12 20:50:09 +1000 | [diff] [blame] | 310 | xfs_dentry_to_name(&name, dentry, inode->i_mode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 312 | error = xfs_link(XFS_I(dir), XFS_I(inode), &name); |
Christoph Hellwig | d9424b3 | 2008-12-03 12:20:27 +0100 | [diff] [blame] | 313 | if (unlikely(error)) |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 314 | return error; |
Christoph Hellwig | a3da789 | 2008-03-06 13:46:12 +1100 | [diff] [blame] | 315 | |
Al Viro | 7de9c6ee | 2010-10-23 11:11:40 -0400 | [diff] [blame] | 316 | ihold(inode); |
Christoph Hellwig | a3da789 | 2008-03-06 13:46:12 +1100 | [diff] [blame] | 317 | d_instantiate(dentry, inode); |
| 318 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | } |
| 320 | |
| 321 | STATIC int |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 322 | xfs_vn_unlink( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 323 | struct inode *dir, |
| 324 | struct dentry *dentry) |
| 325 | { |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 326 | struct xfs_name name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 327 | int error; |
| 328 | |
Dave Chinner | 0cb9776 | 2013-08-12 20:50:09 +1000 | [diff] [blame] | 329 | xfs_dentry_to_name(&name, dentry, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 331 | error = xfs_remove(XFS_I(dir), &name, XFS_I(d_inode(dentry))); |
Christoph Hellwig | e570070 | 2008-06-23 13:25:25 +1000 | [diff] [blame] | 332 | if (error) |
| 333 | return error; |
| 334 | |
| 335 | /* |
| 336 | * With unlink, the VFS makes the dentry "negative": no inode, |
| 337 | * but still hashed. This is incompatible with case-insensitive |
| 338 | * mode, so invalidate (unhash) the dentry in CI-mode. |
| 339 | */ |
| 340 | if (xfs_sb_version_hasasciici(&XFS_M(dir->i_sb)->m_sb)) |
| 341 | d_invalidate(dentry); |
| 342 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 343 | } |
| 344 | |
| 345 | STATIC int |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 346 | xfs_vn_symlink( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | struct inode *dir, |
| 348 | struct dentry *dentry, |
| 349 | const char *symname) |
| 350 | { |
Christoph Hellwig | 3937be5 | 2008-03-06 13:46:19 +1100 | [diff] [blame] | 351 | struct inode *inode; |
| 352 | struct xfs_inode *cip = NULL; |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 353 | struct xfs_name name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | int error; |
Al Viro | 576b1d6 | 2011-07-26 02:50:15 -0400 | [diff] [blame] | 355 | umode_t mode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | |
Christoph Hellwig | 3e5daf0 | 2007-10-11 18:09:12 +1000 | [diff] [blame] | 357 | mode = S_IFLNK | |
Al Viro | ce3b0f8 | 2009-03-29 19:08:22 -0400 | [diff] [blame] | 358 | (irix_symlink_mode ? 0777 & ~current_umask() : S_IRWXUGO); |
Dave Chinner | 0cb9776 | 2013-08-12 20:50:09 +1000 | [diff] [blame] | 359 | xfs_dentry_to_name(&name, dentry, mode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | |
Christoph Hellwig | 6c77b0e | 2010-10-06 18:41:17 +0000 | [diff] [blame] | 361 | error = xfs_symlink(XFS_I(dir), &name, symname, mode, &cip); |
Christoph Hellwig | 3937be5 | 2008-03-06 13:46:19 +1100 | [diff] [blame] | 362 | if (unlikely(error)) |
| 363 | goto out; |
| 364 | |
David Chinner | 0165164 | 2008-08-13 15:45:15 +1000 | [diff] [blame] | 365 | inode = VFS_I(cip); |
Christoph Hellwig | 3937be5 | 2008-03-06 13:46:19 +1100 | [diff] [blame] | 366 | |
Eric Paris | 2a7dba3 | 2011-02-01 11:05:39 -0500 | [diff] [blame] | 367 | error = xfs_init_security(inode, dir, &dentry->d_name); |
Christoph Hellwig | 3937be5 | 2008-03-06 13:46:19 +1100 | [diff] [blame] | 368 | if (unlikely(error)) |
| 369 | goto out_cleanup_inode; |
| 370 | |
| 371 | d_instantiate(dentry, inode); |
Dave Chinner | 58c9047 | 2015-02-23 22:38:08 +1100 | [diff] [blame] | 372 | xfs_finish_inode_setup(cip); |
Christoph Hellwig | 3937be5 | 2008-03-06 13:46:19 +1100 | [diff] [blame] | 373 | return 0; |
| 374 | |
| 375 | out_cleanup_inode: |
Dave Chinner | 58c9047 | 2015-02-23 22:38:08 +1100 | [diff] [blame] | 376 | xfs_finish_inode_setup(cip); |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 377 | xfs_cleanup_inode(dir, inode, dentry); |
Brian Foster | d540e43 | 2014-05-06 07:34:28 +1000 | [diff] [blame] | 378 | iput(inode); |
Christoph Hellwig | 3937be5 | 2008-03-06 13:46:19 +1100 | [diff] [blame] | 379 | out: |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 380 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | } |
| 382 | |
| 383 | STATIC int |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 384 | xfs_vn_rename( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 385 | struct inode *odir, |
| 386 | struct dentry *odentry, |
| 387 | struct inode *ndir, |
Carlos Maiolino | dbe1b5c | 2014-12-24 08:51:38 +1100 | [diff] [blame] | 388 | struct dentry *ndentry, |
| 389 | unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | { |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 391 | struct inode *new_inode = d_inode(ndentry); |
Carlos Maiolino | d31a182 | 2014-12-24 08:51:42 +1100 | [diff] [blame] | 392 | int omode = 0; |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 393 | struct xfs_name oname; |
| 394 | struct xfs_name nname; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | |
Dave Chinner | 7dcf5c3 | 2015-03-25 14:08:08 +1100 | [diff] [blame] | 396 | if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT)) |
Carlos Maiolino | dbe1b5c | 2014-12-24 08:51:38 +1100 | [diff] [blame] | 397 | return -EINVAL; |
| 398 | |
Carlos Maiolino | d31a182 | 2014-12-24 08:51:42 +1100 | [diff] [blame] | 399 | /* if we are exchanging files, we need to set i_mode of both files */ |
| 400 | if (flags & RENAME_EXCHANGE) |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 401 | omode = d_inode(ndentry)->i_mode; |
Carlos Maiolino | d31a182 | 2014-12-24 08:51:42 +1100 | [diff] [blame] | 402 | |
| 403 | xfs_dentry_to_name(&oname, odentry, omode); |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 404 | xfs_dentry_to_name(&nname, ndentry, d_inode(odentry)->i_mode); |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 405 | |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 406 | return xfs_rename(XFS_I(odir), &oname, XFS_I(d_inode(odentry)), |
Carlos Maiolino | dbe1b5c | 2014-12-24 08:51:38 +1100 | [diff] [blame] | 407 | XFS_I(ndir), &nname, |
Carlos Maiolino | d31a182 | 2014-12-24 08:51:42 +1100 | [diff] [blame] | 408 | new_inode ? XFS_I(new_inode) : NULL, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 409 | } |
| 410 | |
| 411 | /* |
| 412 | * careful here - this function can get called recursively, so |
| 413 | * we need to be very careful about how much stack we use. |
| 414 | * uio is kmalloced for this reason... |
| 415 | */ |
Al Viro | 680baac | 2015-05-02 13:32:22 -0400 | [diff] [blame] | 416 | STATIC const char * |
Al Viro | 6b25539 | 2015-11-17 10:20:54 -0500 | [diff] [blame] | 417 | xfs_vn_get_link( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | struct dentry *dentry, |
Al Viro | 6b25539 | 2015-11-17 10:20:54 -0500 | [diff] [blame] | 419 | struct inode *inode, |
Al Viro | 6e77137 | 2015-05-02 13:37:52 -0400 | [diff] [blame] | 420 | void **cookie) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | char *link; |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 423 | int error = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | |
Al Viro | 6b25539 | 2015-11-17 10:20:54 -0500 | [diff] [blame] | 425 | if (!dentry) |
| 426 | return ERR_PTR(-ECHILD); |
| 427 | |
Panagiotis Issaris | f52720c | 2006-09-27 01:49:39 -0700 | [diff] [blame] | 428 | link = kmalloc(MAXPATHLEN+1, GFP_KERNEL); |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 429 | if (!link) |
| 430 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 432 | error = xfs_readlink(XFS_I(d_inode(dentry)), link); |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 433 | if (unlikely(error)) |
| 434 | goto out_kfree; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | |
Al Viro | 680baac | 2015-05-02 13:32:22 -0400 | [diff] [blame] | 436 | return *cookie = link; |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 437 | |
| 438 | out_kfree: |
| 439 | kfree(link); |
| 440 | out_err: |
Al Viro | 680baac | 2015-05-02 13:32:22 -0400 | [diff] [blame] | 441 | return ERR_PTR(error); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 442 | } |
| 443 | |
Christoph Hellwig | 4576758 | 2008-02-05 12:13:24 +1100 | [diff] [blame] | 444 | STATIC int |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 445 | xfs_vn_getattr( |
Christoph Hellwig | c43f408 | 2007-10-11 17:46:39 +1000 | [diff] [blame] | 446 | struct vfsmount *mnt, |
| 447 | struct dentry *dentry, |
| 448 | struct kstat *stat) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 449 | { |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 450 | struct inode *inode = d_inode(dentry); |
Christoph Hellwig | c43f408 | 2007-10-11 17:46:39 +1000 | [diff] [blame] | 451 | struct xfs_inode *ip = XFS_I(inode); |
| 452 | struct xfs_mount *mp = ip->i_mount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 453 | |
Christoph Hellwig | cca28fb | 2010-06-24 11:57:09 +1000 | [diff] [blame] | 454 | trace_xfs_getattr(ip); |
Christoph Hellwig | c43f408 | 2007-10-11 17:46:39 +1000 | [diff] [blame] | 455 | |
| 456 | if (XFS_FORCED_SHUTDOWN(mp)) |
Eric Sandeen | b474c7a | 2014-06-22 15:04:54 +1000 | [diff] [blame] | 457 | return -EIO; |
Christoph Hellwig | c43f408 | 2007-10-11 17:46:39 +1000 | [diff] [blame] | 458 | |
| 459 | stat->size = XFS_ISIZE(ip); |
| 460 | stat->dev = inode->i_sb->s_dev; |
| 461 | stat->mode = ip->i_d.di_mode; |
| 462 | stat->nlink = ip->i_d.di_nlink; |
Dwight Engen | 7aab1b2 | 2013-08-15 14:08:01 -0400 | [diff] [blame] | 463 | stat->uid = inode->i_uid; |
| 464 | stat->gid = inode->i_gid; |
Christoph Hellwig | c43f408 | 2007-10-11 17:46:39 +1000 | [diff] [blame] | 465 | stat->ino = ip->i_ino; |
Christoph Hellwig | c43f408 | 2007-10-11 17:46:39 +1000 | [diff] [blame] | 466 | stat->atime = inode->i_atime; |
Christoph Hellwig | f9581b1 | 2009-10-06 20:29:26 +0000 | [diff] [blame] | 467 | stat->mtime = inode->i_mtime; |
| 468 | stat->ctime = inode->i_ctime; |
Christoph Hellwig | c43f408 | 2007-10-11 17:46:39 +1000 | [diff] [blame] | 469 | stat->blocks = |
| 470 | XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks); |
| 471 | |
| 472 | |
| 473 | switch (inode->i_mode & S_IFMT) { |
| 474 | case S_IFBLK: |
| 475 | case S_IFCHR: |
| 476 | stat->blksize = BLKDEV_IOSIZE; |
| 477 | stat->rdev = MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff, |
| 478 | sysv_minor(ip->i_df.if_u2.if_rdev)); |
| 479 | break; |
| 480 | default: |
Eric Sandeen | 71ddabb | 2007-11-23 16:29:42 +1100 | [diff] [blame] | 481 | if (XFS_IS_REALTIME_INODE(ip)) { |
Christoph Hellwig | c43f408 | 2007-10-11 17:46:39 +1000 | [diff] [blame] | 482 | /* |
| 483 | * If the file blocks are being allocated from a |
| 484 | * realtime volume, then return the inode's realtime |
| 485 | * extent size or the realtime volume's extent size. |
| 486 | */ |
| 487 | stat->blksize = |
| 488 | xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog; |
| 489 | } else |
| 490 | stat->blksize = xfs_preferred_iosize(mp); |
| 491 | stat->rdev = 0; |
| 492 | break; |
Nathan Scott | 69e23b9 | 2006-09-28 11:01:22 +1000 | [diff] [blame] | 493 | } |
Christoph Hellwig | c43f408 | 2007-10-11 17:46:39 +1000 | [diff] [blame] | 494 | |
| 495 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | } |
| 497 | |
Dave Chinner | 56c19e8 | 2013-05-27 16:38:25 +1000 | [diff] [blame] | 498 | static void |
| 499 | xfs_setattr_mode( |
Dave Chinner | 56c19e8 | 2013-05-27 16:38:25 +1000 | [diff] [blame] | 500 | struct xfs_inode *ip, |
| 501 | struct iattr *iattr) |
| 502 | { |
Christoph Hellwig | 0c3d88d | 2013-11-18 05:10:40 -0800 | [diff] [blame] | 503 | struct inode *inode = VFS_I(ip); |
| 504 | umode_t mode = iattr->ia_mode; |
Dave Chinner | 56c19e8 | 2013-05-27 16:38:25 +1000 | [diff] [blame] | 505 | |
Dave Chinner | 56c19e8 | 2013-05-27 16:38:25 +1000 | [diff] [blame] | 506 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
| 507 | |
Dave Chinner | 56c19e8 | 2013-05-27 16:38:25 +1000 | [diff] [blame] | 508 | ip->i_d.di_mode &= S_IFMT; |
| 509 | ip->i_d.di_mode |= mode & ~S_IFMT; |
| 510 | |
| 511 | inode->i_mode &= S_IFMT; |
| 512 | inode->i_mode |= mode & ~S_IFMT; |
| 513 | } |
| 514 | |
Christoph Hellwig | 5278511 | 2015-02-16 11:49:23 +1100 | [diff] [blame] | 515 | void |
Christoph Hellwig | c91c46c | 2013-11-18 05:10:52 -0800 | [diff] [blame] | 516 | xfs_setattr_time( |
| 517 | struct xfs_inode *ip, |
| 518 | struct iattr *iattr) |
| 519 | { |
| 520 | struct inode *inode = VFS_I(ip); |
| 521 | |
| 522 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
| 523 | |
| 524 | if (iattr->ia_valid & ATTR_ATIME) { |
| 525 | inode->i_atime = iattr->ia_atime; |
| 526 | ip->i_d.di_atime.t_sec = iattr->ia_atime.tv_sec; |
| 527 | ip->i_d.di_atime.t_nsec = iattr->ia_atime.tv_nsec; |
| 528 | } |
| 529 | if (iattr->ia_valid & ATTR_CTIME) { |
| 530 | inode->i_ctime = iattr->ia_ctime; |
| 531 | ip->i_d.di_ctime.t_sec = iattr->ia_ctime.tv_sec; |
| 532 | ip->i_d.di_ctime.t_nsec = iattr->ia_ctime.tv_nsec; |
| 533 | } |
| 534 | if (iattr->ia_valid & ATTR_MTIME) { |
| 535 | inode->i_mtime = iattr->ia_mtime; |
| 536 | ip->i_d.di_mtime.t_sec = iattr->ia_mtime.tv_sec; |
| 537 | ip->i_d.di_mtime.t_nsec = iattr->ia_mtime.tv_nsec; |
| 538 | } |
| 539 | } |
| 540 | |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 541 | int |
| 542 | xfs_setattr_nonsize( |
| 543 | struct xfs_inode *ip, |
| 544 | struct iattr *iattr, |
| 545 | int flags) |
| 546 | { |
| 547 | xfs_mount_t *mp = ip->i_mount; |
| 548 | struct inode *inode = VFS_I(ip); |
| 549 | int mask = iattr->ia_valid; |
| 550 | xfs_trans_t *tp; |
| 551 | int error; |
Dwight Engen | 7aab1b2 | 2013-08-15 14:08:01 -0400 | [diff] [blame] | 552 | kuid_t uid = GLOBAL_ROOT_UID, iuid = GLOBAL_ROOT_UID; |
| 553 | kgid_t gid = GLOBAL_ROOT_GID, igid = GLOBAL_ROOT_GID; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 554 | struct xfs_dquot *udqp = NULL, *gdqp = NULL; |
| 555 | struct xfs_dquot *olddquot1 = NULL, *olddquot2 = NULL; |
| 556 | |
| 557 | trace_xfs_setattr(ip); |
| 558 | |
Carlos Maiolino | 42c49d7 | 2013-06-21 14:45:53 -0300 | [diff] [blame] | 559 | /* If acls are being inherited, we already have this checked */ |
| 560 | if (!(flags & XFS_ATTR_NOACL)) { |
| 561 | if (mp->m_flags & XFS_MOUNT_RDONLY) |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 562 | return -EROFS; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 563 | |
Carlos Maiolino | 42c49d7 | 2013-06-21 14:45:53 -0300 | [diff] [blame] | 564 | if (XFS_FORCED_SHUTDOWN(mp)) |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 565 | return -EIO; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 566 | |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 567 | error = inode_change_ok(inode, iattr); |
Carlos Maiolino | 42c49d7 | 2013-06-21 14:45:53 -0300 | [diff] [blame] | 568 | if (error) |
Eric Sandeen | b474c7a | 2014-06-22 15:04:54 +1000 | [diff] [blame] | 569 | return error; |
Carlos Maiolino | 42c49d7 | 2013-06-21 14:45:53 -0300 | [diff] [blame] | 570 | } |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 571 | |
| 572 | ASSERT((mask & ATTR_SIZE) == 0); |
| 573 | |
| 574 | /* |
| 575 | * If disk quotas is on, we make sure that the dquots do exist on disk, |
| 576 | * before we start any other transactions. Trying to do this later |
| 577 | * is messy. We don't care to take a readlock to look at the ids |
| 578 | * in inode here, because we can't hold it across the trans_reserve. |
| 579 | * If the IDs do change before we take the ilock, we're covered |
| 580 | * because the i_*dquot fields will get updated anyway. |
| 581 | */ |
| 582 | if (XFS_IS_QUOTA_ON(mp) && (mask & (ATTR_UID|ATTR_GID))) { |
| 583 | uint qflags = 0; |
| 584 | |
| 585 | if ((mask & ATTR_UID) && XFS_IS_UQUOTA_ON(mp)) { |
| 586 | uid = iattr->ia_uid; |
| 587 | qflags |= XFS_QMOPT_UQUOTA; |
| 588 | } else { |
Dwight Engen | 7aab1b2 | 2013-08-15 14:08:01 -0400 | [diff] [blame] | 589 | uid = inode->i_uid; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 590 | } |
| 591 | if ((mask & ATTR_GID) && XFS_IS_GQUOTA_ON(mp)) { |
| 592 | gid = iattr->ia_gid; |
| 593 | qflags |= XFS_QMOPT_GQUOTA; |
| 594 | } else { |
Dwight Engen | 7aab1b2 | 2013-08-15 14:08:01 -0400 | [diff] [blame] | 595 | gid = inode->i_gid; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 596 | } |
| 597 | |
| 598 | /* |
| 599 | * We take a reference when we initialize udqp and gdqp, |
| 600 | * so it is important that we never blindly double trip on |
| 601 | * the same variable. See xfs_create() for an example. |
| 602 | */ |
| 603 | ASSERT(udqp == NULL); |
| 604 | ASSERT(gdqp == NULL); |
Dwight Engen | 7aab1b2 | 2013-08-15 14:08:01 -0400 | [diff] [blame] | 605 | error = xfs_qm_vop_dqalloc(ip, xfs_kuid_to_uid(uid), |
| 606 | xfs_kgid_to_gid(gid), |
| 607 | xfs_get_projid(ip), |
| 608 | qflags, &udqp, &gdqp, NULL); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 609 | if (error) |
| 610 | return error; |
| 611 | } |
| 612 | |
| 613 | tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_NOT_SIZE); |
Jie Liu | 3d3c8b5 | 2013-08-12 20:49:59 +1000 | [diff] [blame] | 614 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_ichange, 0, 0); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 615 | if (error) |
Eric Sandeen | 1a7ccad | 2015-08-28 14:51:10 +1000 | [diff] [blame] | 616 | goto out_trans_cancel; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 617 | |
| 618 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
| 619 | |
| 620 | /* |
| 621 | * Change file ownership. Must be the owner or privileged. |
| 622 | */ |
| 623 | if (mask & (ATTR_UID|ATTR_GID)) { |
| 624 | /* |
| 625 | * These IDs could have changed since we last looked at them. |
| 626 | * But, we're assured that if the ownership did change |
| 627 | * while we didn't have the inode locked, inode's dquot(s) |
| 628 | * would have changed also. |
| 629 | */ |
Dwight Engen | 7aab1b2 | 2013-08-15 14:08:01 -0400 | [diff] [blame] | 630 | iuid = inode->i_uid; |
| 631 | igid = inode->i_gid; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 632 | gid = (mask & ATTR_GID) ? iattr->ia_gid : igid; |
| 633 | uid = (mask & ATTR_UID) ? iattr->ia_uid : iuid; |
| 634 | |
| 635 | /* |
| 636 | * Do a quota reservation only if uid/gid is actually |
| 637 | * going to change. |
| 638 | */ |
| 639 | if (XFS_IS_QUOTA_RUNNING(mp) && |
Dwight Engen | 7aab1b2 | 2013-08-15 14:08:01 -0400 | [diff] [blame] | 640 | ((XFS_IS_UQUOTA_ON(mp) && !uid_eq(iuid, uid)) || |
| 641 | (XFS_IS_GQUOTA_ON(mp) && !gid_eq(igid, gid)))) { |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 642 | ASSERT(tp); |
| 643 | error = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp, |
Chandra Seetharaman | 92f8ff7 | 2013-07-11 00:00:40 -0500 | [diff] [blame] | 644 | NULL, capable(CAP_FOWNER) ? |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 645 | XFS_QMOPT_FORCE_RES : 0); |
| 646 | if (error) /* out of quota */ |
Eric Sandeen | 1a7ccad | 2015-08-28 14:51:10 +1000 | [diff] [blame] | 647 | goto out_unlock; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 648 | } |
| 649 | } |
| 650 | |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 651 | xfs_trans_ijoin(tp, ip, 0); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 652 | |
| 653 | /* |
| 654 | * Change file ownership. Must be the owner or privileged. |
| 655 | */ |
| 656 | if (mask & (ATTR_UID|ATTR_GID)) { |
| 657 | /* |
| 658 | * CAP_FSETID overrides the following restrictions: |
| 659 | * |
| 660 | * The set-user-ID and set-group-ID bits of a file will be |
| 661 | * cleared upon successful return from chown() |
| 662 | */ |
| 663 | if ((ip->i_d.di_mode & (S_ISUID|S_ISGID)) && |
| 664 | !capable(CAP_FSETID)) |
| 665 | ip->i_d.di_mode &= ~(S_ISUID|S_ISGID); |
| 666 | |
| 667 | /* |
| 668 | * Change the ownerships and register quota modifications |
| 669 | * in the transaction. |
| 670 | */ |
Dwight Engen | 7aab1b2 | 2013-08-15 14:08:01 -0400 | [diff] [blame] | 671 | if (!uid_eq(iuid, uid)) { |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 672 | if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_UQUOTA_ON(mp)) { |
| 673 | ASSERT(mask & ATTR_UID); |
| 674 | ASSERT(udqp); |
| 675 | olddquot1 = xfs_qm_vop_chown(tp, ip, |
| 676 | &ip->i_udquot, udqp); |
| 677 | } |
Dwight Engen | 7aab1b2 | 2013-08-15 14:08:01 -0400 | [diff] [blame] | 678 | ip->i_d.di_uid = xfs_kuid_to_uid(uid); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 679 | inode->i_uid = uid; |
| 680 | } |
Dwight Engen | 7aab1b2 | 2013-08-15 14:08:01 -0400 | [diff] [blame] | 681 | if (!gid_eq(igid, gid)) { |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 682 | if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_GQUOTA_ON(mp)) { |
Jie Liu | 5a01dd5 | 2013-11-26 21:38:34 +0800 | [diff] [blame] | 683 | ASSERT(xfs_sb_version_has_pquotino(&mp->m_sb) || |
| 684 | !XFS_IS_PQUOTA_ON(mp)); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 685 | ASSERT(mask & ATTR_GID); |
| 686 | ASSERT(gdqp); |
| 687 | olddquot2 = xfs_qm_vop_chown(tp, ip, |
| 688 | &ip->i_gdquot, gdqp); |
| 689 | } |
Dwight Engen | 7aab1b2 | 2013-08-15 14:08:01 -0400 | [diff] [blame] | 690 | ip->i_d.di_gid = xfs_kgid_to_gid(gid); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 691 | inode->i_gid = gid; |
| 692 | } |
| 693 | } |
| 694 | |
Dave Chinner | 56c19e8 | 2013-05-27 16:38:25 +1000 | [diff] [blame] | 695 | if (mask & ATTR_MODE) |
Christoph Hellwig | 0c3d88d | 2013-11-18 05:10:40 -0800 | [diff] [blame] | 696 | xfs_setattr_mode(ip, iattr); |
Christoph Hellwig | c91c46c | 2013-11-18 05:10:52 -0800 | [diff] [blame] | 697 | if (mask & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME)) |
| 698 | xfs_setattr_time(ip, iattr); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 699 | |
| 700 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| 701 | |
Bill O'Donnell | ff6d6af | 2015-10-12 18:21:22 +1100 | [diff] [blame] | 702 | XFS_STATS_INC(mp, xs_ig_attrchg); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 703 | |
| 704 | if (mp->m_flags & XFS_MOUNT_WSYNC) |
| 705 | xfs_trans_set_sync(tp); |
Christoph Hellwig | 7039331 | 2015-06-04 13:48:08 +1000 | [diff] [blame] | 706 | error = xfs_trans_commit(tp); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 707 | |
| 708 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| 709 | |
| 710 | /* |
| 711 | * Release any dquot(s) the inode had kept before chown. |
| 712 | */ |
| 713 | xfs_qm_dqrele(olddquot1); |
| 714 | xfs_qm_dqrele(olddquot2); |
| 715 | xfs_qm_dqrele(udqp); |
| 716 | xfs_qm_dqrele(gdqp); |
| 717 | |
| 718 | if (error) |
Eric Sandeen | b474c7a | 2014-06-22 15:04:54 +1000 | [diff] [blame] | 719 | return error; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 720 | |
| 721 | /* |
| 722 | * XXX(hch): Updating the ACL entries is not atomic vs the i_mode |
| 723 | * update. We could avoid this with linked transactions |
| 724 | * and passing down the transaction pointer all the way |
| 725 | * to attr_set. No previous user of the generic |
| 726 | * Posix ACL code seems to care about this issue either. |
| 727 | */ |
| 728 | if ((mask & ATTR_MODE) && !(flags & XFS_ATTR_NOACL)) { |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 729 | error = posix_acl_chmod(inode, inode->i_mode); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 730 | if (error) |
Eric Sandeen | b474c7a | 2014-06-22 15:04:54 +1000 | [diff] [blame] | 731 | return error; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 732 | } |
| 733 | |
| 734 | return 0; |
| 735 | |
Eric Sandeen | 1a7ccad | 2015-08-28 14:51:10 +1000 | [diff] [blame] | 736 | out_unlock: |
| 737 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 738 | out_trans_cancel: |
Christoph Hellwig | 4906e21 | 2015-06-04 13:47:56 +1000 | [diff] [blame] | 739 | xfs_trans_cancel(tp); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 740 | xfs_qm_dqrele(udqp); |
| 741 | xfs_qm_dqrele(gdqp); |
| 742 | return error; |
| 743 | } |
| 744 | |
| 745 | /* |
| 746 | * Truncate file. Must have write permission and not be a directory. |
| 747 | */ |
| 748 | int |
| 749 | xfs_setattr_size( |
| 750 | struct xfs_inode *ip, |
Christoph Hellwig | 76ca4c2 | 2013-10-14 07:09:35 -0700 | [diff] [blame] | 751 | struct iattr *iattr) |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 752 | { |
| 753 | struct xfs_mount *mp = ip->i_mount; |
| 754 | struct inode *inode = VFS_I(ip); |
Christoph Hellwig | 673e8e5 | 2011-12-18 20:00:04 +0000 | [diff] [blame] | 755 | xfs_off_t oldsize, newsize; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 756 | struct xfs_trans *tp; |
| 757 | int error; |
Christoph Hellwig | f38996f | 2012-03-27 10:34:48 -0400 | [diff] [blame] | 758 | uint lock_flags = 0; |
Dave Chinner | 5885ebd | 2015-02-23 22:37:08 +1100 | [diff] [blame] | 759 | bool did_zeroing = false; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 760 | |
| 761 | trace_xfs_setattr(ip); |
| 762 | |
| 763 | if (mp->m_flags & XFS_MOUNT_RDONLY) |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 764 | return -EROFS; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 765 | |
| 766 | if (XFS_FORCED_SHUTDOWN(mp)) |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 767 | return -EIO; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 768 | |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 769 | error = inode_change_ok(inode, iattr); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 770 | if (error) |
Eric Sandeen | b474c7a | 2014-06-22 15:04:54 +1000 | [diff] [blame] | 771 | return error; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 772 | |
Christoph Hellwig | 76ca4c2 | 2013-10-14 07:09:35 -0700 | [diff] [blame] | 773 | ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); |
Dave Chinner | e8e9ad4 | 2015-02-23 21:45:32 +1100 | [diff] [blame] | 774 | ASSERT(xfs_isilocked(ip, XFS_MMAPLOCK_EXCL)); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 775 | ASSERT(S_ISREG(ip->i_d.di_mode)); |
Christoph Hellwig | fe60a8a | 2014-02-10 10:35:22 +1100 | [diff] [blame] | 776 | ASSERT((iattr->ia_valid & (ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_ATIME_SET| |
| 777 | ATTR_MTIME_SET|ATTR_KILL_PRIV|ATTR_TIMES_SET)) == 0); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 778 | |
Christoph Hellwig | ce7ae151 | 2011-12-18 20:00:11 +0000 | [diff] [blame] | 779 | oldsize = inode->i_size; |
Christoph Hellwig | 673e8e5 | 2011-12-18 20:00:04 +0000 | [diff] [blame] | 780 | newsize = iattr->ia_size; |
| 781 | |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 782 | /* |
| 783 | * Short circuit the truncate case for zero length files. |
| 784 | */ |
Christoph Hellwig | 673e8e5 | 2011-12-18 20:00:04 +0000 | [diff] [blame] | 785 | if (newsize == 0 && oldsize == 0 && ip->i_d.di_nextents == 0) { |
Christoph Hellwig | fe60a8a | 2014-02-10 10:35:22 +1100 | [diff] [blame] | 786 | if (!(iattr->ia_valid & (ATTR_CTIME|ATTR_MTIME))) |
Christoph Hellwig | 76ca4c2 | 2013-10-14 07:09:35 -0700 | [diff] [blame] | 787 | return 0; |
Christoph Hellwig | 681b120 | 2011-07-08 14:34:26 +0200 | [diff] [blame] | 788 | |
| 789 | /* |
| 790 | * Use the regular setattr path to update the timestamps. |
| 791 | */ |
Christoph Hellwig | 681b120 | 2011-07-08 14:34:26 +0200 | [diff] [blame] | 792 | iattr->ia_valid &= ~ATTR_SIZE; |
| 793 | return xfs_setattr_nonsize(ip, iattr, 0); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 794 | } |
| 795 | |
| 796 | /* |
| 797 | * Make sure that the dquots are attached to the inode. |
| 798 | */ |
Christoph Hellwig | f38996f | 2012-03-27 10:34:48 -0400 | [diff] [blame] | 799 | error = xfs_qm_dqattach(ip, 0); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 800 | if (error) |
Christoph Hellwig | 76ca4c2 | 2013-10-14 07:09:35 -0700 | [diff] [blame] | 801 | return error; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 802 | |
| 803 | /* |
Dave Chinner | 5885ebd | 2015-02-23 22:37:08 +1100 | [diff] [blame] | 804 | * File data changes must be complete before we start the transaction to |
| 805 | * modify the inode. This needs to be done before joining the inode to |
| 806 | * the transaction because the inode cannot be unlocked once it is a |
| 807 | * part of the transaction. |
| 808 | * |
| 809 | * Start with zeroing any data block beyond EOF that we may expose on |
| 810 | * file extension. |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 811 | */ |
Christoph Hellwig | 673e8e5 | 2011-12-18 20:00:04 +0000 | [diff] [blame] | 812 | if (newsize > oldsize) { |
Dave Chinner | 5885ebd | 2015-02-23 22:37:08 +1100 | [diff] [blame] | 813 | error = xfs_zero_eof(ip, newsize, oldsize, &did_zeroing); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 814 | if (error) |
Christoph Hellwig | 76ca4c2 | 2013-10-14 07:09:35 -0700 | [diff] [blame] | 815 | return error; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 816 | } |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 817 | |
| 818 | /* |
| 819 | * We are going to log the inode size change in this transaction so |
| 820 | * any previous writes that are beyond the on disk EOF and the new |
| 821 | * EOF that have not been written out need to be written here. If we |
| 822 | * do not write the data out, we expose ourselves to the null files |
Dave Chinner | 5885ebd | 2015-02-23 22:37:08 +1100 | [diff] [blame] | 823 | * problem. Note that this includes any block zeroing we did above; |
| 824 | * otherwise those blocks may not be zeroed after a crash. |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 825 | */ |
Dave Chinner | 5885ebd | 2015-02-23 22:37:08 +1100 | [diff] [blame] | 826 | if (newsize > ip->i_d.di_size && |
| 827 | (oldsize != ip->i_d.di_size || did_zeroing)) { |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 828 | error = filemap_write_and_wait_range(VFS_I(ip)->i_mapping, |
Dave Chinner | 4bc1ea6 | 2012-11-12 22:53:56 +1100 | [diff] [blame] | 829 | ip->i_d.di_size, newsize); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 830 | if (error) |
Christoph Hellwig | 76ca4c2 | 2013-10-14 07:09:35 -0700 | [diff] [blame] | 831 | return error; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 832 | } |
| 833 | |
Dave Chinner | 5885ebd | 2015-02-23 22:37:08 +1100 | [diff] [blame] | 834 | /* Now wait for all direct I/O to complete. */ |
Christoph Hellwig | 4a06fd2 | 2011-08-23 08:28:13 +0000 | [diff] [blame] | 835 | inode_dio_wait(inode); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 836 | |
Dave Chinner | 49abc3a | 2014-05-07 08:05:45 +1000 | [diff] [blame] | 837 | /* |
Dave Chinner | 0f9160b | 2015-02-23 21:46:58 +1100 | [diff] [blame] | 838 | * We've already locked out new page faults, so now we can safely remove |
| 839 | * pages from the page cache knowing they won't get refaulted until we |
| 840 | * drop the XFS_MMAP_EXCL lock after the extent manipulations are |
| 841 | * complete. The truncate_setsize() call also cleans partial EOF page |
| 842 | * PTEs on extending truncates and hence ensures sub-page block size |
| 843 | * filesystems are correctly handled, too. |
Dave Chinner | 49abc3a | 2014-05-07 08:05:45 +1000 | [diff] [blame] | 844 | * |
Dave Chinner | 0f9160b | 2015-02-23 21:46:58 +1100 | [diff] [blame] | 845 | * We have to do all the page cache truncate work outside the |
| 846 | * transaction context as the "lock" order is page lock->log space |
| 847 | * reservation as defined by extent allocation in the writeback path. |
| 848 | * Hence a truncate can fail with ENOMEM from xfs_trans_reserve(), but |
| 849 | * having already truncated the in-memory version of the file (i.e. made |
| 850 | * user visible changes). There's not much we can do about this, except |
| 851 | * to hope that the caller sees ENOMEM and retries the truncate |
| 852 | * operation. |
Dave Chinner | 49abc3a | 2014-05-07 08:05:45 +1000 | [diff] [blame] | 853 | */ |
Dave Chinner | 9969441 | 2015-06-04 09:19:10 +1000 | [diff] [blame] | 854 | if (IS_DAX(inode)) |
| 855 | error = dax_truncate_page(inode, newsize, xfs_get_blocks_direct); |
| 856 | else |
| 857 | error = block_truncate_page(inode->i_mapping, newsize, |
| 858 | xfs_get_blocks); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 859 | if (error) |
Christoph Hellwig | 76ca4c2 | 2013-10-14 07:09:35 -0700 | [diff] [blame] | 860 | return error; |
Dave Chinner | 49abc3a | 2014-05-07 08:05:45 +1000 | [diff] [blame] | 861 | truncate_setsize(inode, newsize); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 862 | |
| 863 | tp = xfs_trans_alloc(mp, XFS_TRANS_SETATTR_SIZE); |
Jie Liu | 3d3c8b5 | 2013-08-12 20:49:59 +1000 | [diff] [blame] | 864 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_itruncate, 0, 0); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 865 | if (error) |
| 866 | goto out_trans_cancel; |
| 867 | |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 868 | lock_flags |= XFS_ILOCK_EXCL; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 869 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 870 | xfs_trans_ijoin(tp, ip, 0); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 871 | |
| 872 | /* |
| 873 | * Only change the c/mtime if we are changing the size or we are |
| 874 | * explicitly asked to change it. This handles the semantic difference |
| 875 | * between truncate() and ftruncate() as implemented in the VFS. |
| 876 | * |
| 877 | * The regular truncate() case without ATTR_CTIME and ATTR_MTIME is a |
| 878 | * special case where we need to update the times despite not having |
| 879 | * these flags set. For all other operations the VFS set these flags |
| 880 | * explicitly if it wants a timestamp update. |
| 881 | */ |
Christoph Hellwig | fe60a8a | 2014-02-10 10:35:22 +1100 | [diff] [blame] | 882 | if (newsize != oldsize && |
| 883 | !(iattr->ia_valid & (ATTR_CTIME | ATTR_MTIME))) { |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 884 | iattr->ia_ctime = iattr->ia_mtime = |
| 885 | current_fs_time(inode->i_sb); |
Christoph Hellwig | fe60a8a | 2014-02-10 10:35:22 +1100 | [diff] [blame] | 886 | iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 887 | } |
| 888 | |
Christoph Hellwig | 673e8e5 | 2011-12-18 20:00:04 +0000 | [diff] [blame] | 889 | /* |
| 890 | * The first thing we do is set the size to new_size permanently on |
| 891 | * disk. This way we don't have to worry about anyone ever being able |
| 892 | * to look at the data being freed even in the face of a crash. |
| 893 | * What we're getting around here is the case where we free a block, it |
| 894 | * is allocated to another file, it is written to, and then we crash. |
| 895 | * If the new data gets written to the file but the log buffers |
| 896 | * containing the free and reallocation don't, then we'd end up with |
| 897 | * garbage in the blocks being freed. As long as we make the new size |
| 898 | * permanent before actually freeing any blocks it doesn't matter if |
| 899 | * they get written to. |
| 900 | */ |
| 901 | ip->i_d.di_size = newsize; |
Christoph Hellwig | 673e8e5 | 2011-12-18 20:00:04 +0000 | [diff] [blame] | 902 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| 903 | |
| 904 | if (newsize <= oldsize) { |
| 905 | error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, newsize); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 906 | if (error) |
Christoph Hellwig | 4906e21 | 2015-06-04 13:47:56 +1000 | [diff] [blame] | 907 | goto out_trans_cancel; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 908 | |
| 909 | /* |
| 910 | * Truncated "down", so we're removing references to old data |
| 911 | * here - if we delay flushing for a long time, we expose |
| 912 | * ourselves unduly to the notorious NULL files problem. So, |
| 913 | * we mark this inode and flush it when the file is closed, |
| 914 | * and do not wait the usual (long) time for writeout. |
| 915 | */ |
| 916 | xfs_iflags_set(ip, XFS_ITRUNCATED); |
Brian Foster | 27b5286 | 2012-11-06 09:50:38 -0500 | [diff] [blame] | 917 | |
| 918 | /* A truncate down always removes post-EOF blocks. */ |
| 919 | xfs_inode_clear_eofblocks_tag(ip); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 920 | } |
| 921 | |
Christoph Hellwig | fe60a8a | 2014-02-10 10:35:22 +1100 | [diff] [blame] | 922 | if (iattr->ia_valid & ATTR_MODE) |
Christoph Hellwig | 0c3d88d | 2013-11-18 05:10:40 -0800 | [diff] [blame] | 923 | xfs_setattr_mode(ip, iattr); |
Christoph Hellwig | fe60a8a | 2014-02-10 10:35:22 +1100 | [diff] [blame] | 924 | if (iattr->ia_valid & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME)) |
Christoph Hellwig | c91c46c | 2013-11-18 05:10:52 -0800 | [diff] [blame] | 925 | xfs_setattr_time(ip, iattr); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 926 | |
| 927 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| 928 | |
Bill O'Donnell | ff6d6af | 2015-10-12 18:21:22 +1100 | [diff] [blame] | 929 | XFS_STATS_INC(mp, xs_ig_attrchg); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 930 | |
| 931 | if (mp->m_flags & XFS_MOUNT_WSYNC) |
| 932 | xfs_trans_set_sync(tp); |
| 933 | |
Christoph Hellwig | 7039331 | 2015-06-04 13:48:08 +1000 | [diff] [blame] | 934 | error = xfs_trans_commit(tp); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 935 | out_unlock: |
| 936 | if (lock_flags) |
| 937 | xfs_iunlock(ip, lock_flags); |
| 938 | return error; |
| 939 | |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 940 | out_trans_cancel: |
Christoph Hellwig | 4906e21 | 2015-06-04 13:47:56 +1000 | [diff] [blame] | 941 | xfs_trans_cancel(tp); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 942 | goto out_unlock; |
| 943 | } |
| 944 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 945 | STATIC int |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 946 | xfs_vn_setattr( |
Christoph Hellwig | 76ca4c2 | 2013-10-14 07:09:35 -0700 | [diff] [blame] | 947 | struct dentry *dentry, |
| 948 | struct iattr *iattr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 949 | { |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 950 | struct xfs_inode *ip = XFS_I(d_inode(dentry)); |
Christoph Hellwig | 76ca4c2 | 2013-10-14 07:09:35 -0700 | [diff] [blame] | 951 | int error; |
| 952 | |
| 953 | if (iattr->ia_valid & ATTR_SIZE) { |
Christoph Hellwig | 781355c | 2015-02-16 11:59:50 +1100 | [diff] [blame] | 954 | uint iolock = XFS_IOLOCK_EXCL; |
| 955 | |
| 956 | xfs_ilock(ip, iolock); |
Linus Torvalds | 9ec3a64 | 2015-04-26 15:48:49 -0700 | [diff] [blame] | 957 | error = xfs_break_layouts(d_inode(dentry), &iolock, true); |
Dave Chinner | e8e9ad4 | 2015-02-23 21:45:32 +1100 | [diff] [blame] | 958 | if (!error) { |
| 959 | xfs_ilock(ip, XFS_MMAPLOCK_EXCL); |
| 960 | iolock |= XFS_MMAPLOCK_EXCL; |
| 961 | |
Christoph Hellwig | 781355c | 2015-02-16 11:59:50 +1100 | [diff] [blame] | 962 | error = xfs_setattr_size(ip, iattr); |
Dave Chinner | e8e9ad4 | 2015-02-23 21:45:32 +1100 | [diff] [blame] | 963 | } |
Christoph Hellwig | 781355c | 2015-02-16 11:59:50 +1100 | [diff] [blame] | 964 | xfs_iunlock(ip, iolock); |
Christoph Hellwig | 76ca4c2 | 2013-10-14 07:09:35 -0700 | [diff] [blame] | 965 | } else { |
| 966 | error = xfs_setattr_nonsize(ip, iattr, 0); |
| 967 | } |
| 968 | |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 969 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 970 | } |
| 971 | |
Christoph Hellwig | 69ff282 | 2012-06-06 17:01:28 -0400 | [diff] [blame] | 972 | STATIC int |
| 973 | xfs_vn_update_time( |
| 974 | struct inode *inode, |
| 975 | struct timespec *now, |
| 976 | int flags) |
| 977 | { |
| 978 | struct xfs_inode *ip = XFS_I(inode); |
| 979 | struct xfs_mount *mp = ip->i_mount; |
| 980 | struct xfs_trans *tp; |
| 981 | int error; |
| 982 | |
| 983 | trace_xfs_update_time(ip); |
| 984 | |
| 985 | tp = xfs_trans_alloc(mp, XFS_TRANS_FSYNC_TS); |
Jie Liu | 3d3c8b5 | 2013-08-12 20:49:59 +1000 | [diff] [blame] | 986 | error = xfs_trans_reserve(tp, &M_RES(mp)->tr_fsyncts, 0, 0); |
Christoph Hellwig | 69ff282 | 2012-06-06 17:01:28 -0400 | [diff] [blame] | 987 | if (error) { |
Christoph Hellwig | 4906e21 | 2015-06-04 13:47:56 +1000 | [diff] [blame] | 988 | xfs_trans_cancel(tp); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 989 | return error; |
Christoph Hellwig | 69ff282 | 2012-06-06 17:01:28 -0400 | [diff] [blame] | 990 | } |
| 991 | |
| 992 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
| 993 | if (flags & S_CTIME) { |
| 994 | inode->i_ctime = *now; |
| 995 | ip->i_d.di_ctime.t_sec = (__int32_t)now->tv_sec; |
| 996 | ip->i_d.di_ctime.t_nsec = (__int32_t)now->tv_nsec; |
| 997 | } |
| 998 | if (flags & S_MTIME) { |
| 999 | inode->i_mtime = *now; |
| 1000 | ip->i_d.di_mtime.t_sec = (__int32_t)now->tv_sec; |
| 1001 | ip->i_d.di_mtime.t_nsec = (__int32_t)now->tv_nsec; |
| 1002 | } |
| 1003 | if (flags & S_ATIME) { |
| 1004 | inode->i_atime = *now; |
| 1005 | ip->i_d.di_atime.t_sec = (__int32_t)now->tv_sec; |
| 1006 | ip->i_d.di_atime.t_nsec = (__int32_t)now->tv_nsec; |
| 1007 | } |
| 1008 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
| 1009 | xfs_trans_log_inode(tp, ip, XFS_ILOG_TIMESTAMP); |
Christoph Hellwig | 7039331 | 2015-06-04 13:48:08 +1000 | [diff] [blame] | 1010 | return xfs_trans_commit(tp); |
Christoph Hellwig | 69ff282 | 2012-06-06 17:01:28 -0400 | [diff] [blame] | 1011 | } |
| 1012 | |
Eric Sandeen | f35642e | 2008-11-28 14:23:35 +1100 | [diff] [blame] | 1013 | #define XFS_FIEMAP_FLAGS (FIEMAP_FLAG_SYNC|FIEMAP_FLAG_XATTR) |
| 1014 | |
| 1015 | /* |
| 1016 | * Call fiemap helper to fill in user data. |
| 1017 | * Returns positive errors to xfs_getbmap. |
| 1018 | */ |
| 1019 | STATIC int |
| 1020 | xfs_fiemap_format( |
| 1021 | void **arg, |
| 1022 | struct getbmapx *bmv, |
| 1023 | int *full) |
| 1024 | { |
| 1025 | int error; |
| 1026 | struct fiemap_extent_info *fieinfo = *arg; |
| 1027 | u32 fiemap_flags = 0; |
| 1028 | u64 logical, physical, length; |
| 1029 | |
| 1030 | /* Do nothing for a hole */ |
| 1031 | if (bmv->bmv_block == -1LL) |
| 1032 | return 0; |
| 1033 | |
| 1034 | logical = BBTOB(bmv->bmv_offset); |
| 1035 | physical = BBTOB(bmv->bmv_block); |
| 1036 | length = BBTOB(bmv->bmv_length); |
| 1037 | |
| 1038 | if (bmv->bmv_oflags & BMV_OF_PREALLOC) |
| 1039 | fiemap_flags |= FIEMAP_EXTENT_UNWRITTEN; |
| 1040 | else if (bmv->bmv_oflags & BMV_OF_DELALLOC) { |
Jie Liu | 635c4d0 | 2013-06-06 06:24:01 -0700 | [diff] [blame] | 1041 | fiemap_flags |= (FIEMAP_EXTENT_DELALLOC | |
| 1042 | FIEMAP_EXTENT_UNKNOWN); |
Eric Sandeen | f35642e | 2008-11-28 14:23:35 +1100 | [diff] [blame] | 1043 | physical = 0; /* no block yet */ |
| 1044 | } |
| 1045 | if (bmv->bmv_oflags & BMV_OF_LAST) |
| 1046 | fiemap_flags |= FIEMAP_EXTENT_LAST; |
| 1047 | |
| 1048 | error = fiemap_fill_next_extent(fieinfo, logical, physical, |
| 1049 | length, fiemap_flags); |
| 1050 | if (error > 0) { |
| 1051 | error = 0; |
| 1052 | *full = 1; /* user array now full */ |
| 1053 | } |
| 1054 | |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 1055 | return error; |
Eric Sandeen | f35642e | 2008-11-28 14:23:35 +1100 | [diff] [blame] | 1056 | } |
| 1057 | |
| 1058 | STATIC int |
| 1059 | xfs_vn_fiemap( |
| 1060 | struct inode *inode, |
| 1061 | struct fiemap_extent_info *fieinfo, |
| 1062 | u64 start, |
| 1063 | u64 length) |
| 1064 | { |
| 1065 | xfs_inode_t *ip = XFS_I(inode); |
| 1066 | struct getbmapx bm; |
| 1067 | int error; |
| 1068 | |
| 1069 | error = fiemap_check_flags(fieinfo, XFS_FIEMAP_FLAGS); |
| 1070 | if (error) |
| 1071 | return error; |
| 1072 | |
| 1073 | /* Set up bmap header for xfs internal routine */ |
Brian Foster | eedf32b | 2014-08-04 11:35:35 +1000 | [diff] [blame] | 1074 | bm.bmv_offset = BTOBBT(start); |
Eric Sandeen | f35642e | 2008-11-28 14:23:35 +1100 | [diff] [blame] | 1075 | /* Special case for whole file */ |
| 1076 | if (length == FIEMAP_MAX_OFFSET) |
| 1077 | bm.bmv_length = -1LL; |
| 1078 | else |
Brian Foster | eedf32b | 2014-08-04 11:35:35 +1000 | [diff] [blame] | 1079 | bm.bmv_length = BTOBB(start + length) - bm.bmv_offset; |
Eric Sandeen | f35642e | 2008-11-28 14:23:35 +1100 | [diff] [blame] | 1080 | |
Eric Sandeen | 97db39a | 2009-07-26 21:52:01 -0500 | [diff] [blame] | 1081 | /* We add one because in getbmap world count includes the header */ |
Tao Ma | 2d1ff3c | 2010-04-29 15:13:56 +1000 | [diff] [blame] | 1082 | bm.bmv_count = !fieinfo->fi_extents_max ? MAXEXTNUM : |
| 1083 | fieinfo->fi_extents_max + 1; |
| 1084 | bm.bmv_count = min_t(__s32, bm.bmv_count, |
| 1085 | (PAGE_SIZE * 16 / sizeof(struct getbmapx))); |
Tao Ma | 9af2546 | 2010-08-30 02:44:03 +0000 | [diff] [blame] | 1086 | bm.bmv_iflags = BMV_IF_PREALLOC | BMV_IF_NO_HOLES; |
Eric Sandeen | f35642e | 2008-11-28 14:23:35 +1100 | [diff] [blame] | 1087 | if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) |
| 1088 | bm.bmv_iflags |= BMV_IF_ATTRFORK; |
| 1089 | if (!(fieinfo->fi_flags & FIEMAP_FLAG_SYNC)) |
| 1090 | bm.bmv_iflags |= BMV_IF_DELALLOC; |
| 1091 | |
| 1092 | error = xfs_getbmap(ip, &bm, xfs_fiemap_format, fieinfo); |
| 1093 | if (error) |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 1094 | return error; |
Eric Sandeen | f35642e | 2008-11-28 14:23:35 +1100 | [diff] [blame] | 1095 | |
| 1096 | return 0; |
| 1097 | } |
| 1098 | |
Zhi Yong Wu | 99b6436 | 2013-12-18 08:22:40 +0800 | [diff] [blame] | 1099 | STATIC int |
| 1100 | xfs_vn_tmpfile( |
| 1101 | struct inode *dir, |
| 1102 | struct dentry *dentry, |
| 1103 | umode_t mode) |
| 1104 | { |
Brian Foster | d540e43 | 2014-05-06 07:34:28 +1000 | [diff] [blame] | 1105 | return xfs_generic_create(dir, dentry, mode, 0, true); |
Zhi Yong Wu | 99b6436 | 2013-12-18 08:22:40 +0800 | [diff] [blame] | 1106 | } |
| 1107 | |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1108 | static const struct inode_operations xfs_inode_operations = { |
Christoph Hellwig | 4e34e71 | 2011-07-23 17:37:31 +0200 | [diff] [blame] | 1109 | .get_acl = xfs_get_acl, |
Christoph Hellwig | 2401dc2 | 2013-12-20 05:16:50 -0800 | [diff] [blame] | 1110 | .set_acl = xfs_set_acl, |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 1111 | .getattr = xfs_vn_getattr, |
| 1112 | .setattr = xfs_vn_setattr, |
Lachlan McIlroy | 0ec5851 | 2008-06-23 13:23:01 +1000 | [diff] [blame] | 1113 | .setxattr = generic_setxattr, |
| 1114 | .getxattr = generic_getxattr, |
| 1115 | .removexattr = generic_removexattr, |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 1116 | .listxattr = xfs_vn_listxattr, |
Eric Sandeen | f35642e | 2008-11-28 14:23:35 +1100 | [diff] [blame] | 1117 | .fiemap = xfs_vn_fiemap, |
Christoph Hellwig | 69ff282 | 2012-06-06 17:01:28 -0400 | [diff] [blame] | 1118 | .update_time = xfs_vn_update_time, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1119 | }; |
| 1120 | |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1121 | static const struct inode_operations xfs_dir_inode_operations = { |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 1122 | .create = xfs_vn_create, |
| 1123 | .lookup = xfs_vn_lookup, |
| 1124 | .link = xfs_vn_link, |
| 1125 | .unlink = xfs_vn_unlink, |
| 1126 | .symlink = xfs_vn_symlink, |
| 1127 | .mkdir = xfs_vn_mkdir, |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1128 | /* |
| 1129 | * Yes, XFS uses the same method for rmdir and unlink. |
| 1130 | * |
| 1131 | * There are some subtile differences deeper in the code, |
| 1132 | * but we use S_ISDIR to check for those. |
| 1133 | */ |
| 1134 | .rmdir = xfs_vn_unlink, |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 1135 | .mknod = xfs_vn_mknod, |
Carlos Maiolino | dbe1b5c | 2014-12-24 08:51:38 +1100 | [diff] [blame] | 1136 | .rename2 = xfs_vn_rename, |
Christoph Hellwig | 4e34e71 | 2011-07-23 17:37:31 +0200 | [diff] [blame] | 1137 | .get_acl = xfs_get_acl, |
Christoph Hellwig | 2401dc2 | 2013-12-20 05:16:50 -0800 | [diff] [blame] | 1138 | .set_acl = xfs_set_acl, |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 1139 | .getattr = xfs_vn_getattr, |
| 1140 | .setattr = xfs_vn_setattr, |
Lachlan McIlroy | 0ec5851 | 2008-06-23 13:23:01 +1000 | [diff] [blame] | 1141 | .setxattr = generic_setxattr, |
| 1142 | .getxattr = generic_getxattr, |
| 1143 | .removexattr = generic_removexattr, |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 1144 | .listxattr = xfs_vn_listxattr, |
Christoph Hellwig | 69ff282 | 2012-06-06 17:01:28 -0400 | [diff] [blame] | 1145 | .update_time = xfs_vn_update_time, |
Zhi Yong Wu | 99b6436 | 2013-12-18 08:22:40 +0800 | [diff] [blame] | 1146 | .tmpfile = xfs_vn_tmpfile, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1147 | }; |
| 1148 | |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1149 | static const struct inode_operations xfs_dir_ci_inode_operations = { |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 1150 | .create = xfs_vn_create, |
| 1151 | .lookup = xfs_vn_ci_lookup, |
| 1152 | .link = xfs_vn_link, |
| 1153 | .unlink = xfs_vn_unlink, |
| 1154 | .symlink = xfs_vn_symlink, |
| 1155 | .mkdir = xfs_vn_mkdir, |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1156 | /* |
| 1157 | * Yes, XFS uses the same method for rmdir and unlink. |
| 1158 | * |
| 1159 | * There are some subtile differences deeper in the code, |
| 1160 | * but we use S_ISDIR to check for those. |
| 1161 | */ |
| 1162 | .rmdir = xfs_vn_unlink, |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 1163 | .mknod = xfs_vn_mknod, |
Carlos Maiolino | dbe1b5c | 2014-12-24 08:51:38 +1100 | [diff] [blame] | 1164 | .rename2 = xfs_vn_rename, |
Christoph Hellwig | 4e34e71 | 2011-07-23 17:37:31 +0200 | [diff] [blame] | 1165 | .get_acl = xfs_get_acl, |
Christoph Hellwig | 2401dc2 | 2013-12-20 05:16:50 -0800 | [diff] [blame] | 1166 | .set_acl = xfs_set_acl, |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 1167 | .getattr = xfs_vn_getattr, |
| 1168 | .setattr = xfs_vn_setattr, |
Lachlan McIlroy | 0ec5851 | 2008-06-23 13:23:01 +1000 | [diff] [blame] | 1169 | .setxattr = generic_setxattr, |
| 1170 | .getxattr = generic_getxattr, |
| 1171 | .removexattr = generic_removexattr, |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 1172 | .listxattr = xfs_vn_listxattr, |
Christoph Hellwig | 69ff282 | 2012-06-06 17:01:28 -0400 | [diff] [blame] | 1173 | .update_time = xfs_vn_update_time, |
Zhi Yong Wu | 99b6436 | 2013-12-18 08:22:40 +0800 | [diff] [blame] | 1174 | .tmpfile = xfs_vn_tmpfile, |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 1175 | }; |
| 1176 | |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1177 | static const struct inode_operations xfs_symlink_inode_operations = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1178 | .readlink = generic_readlink, |
Al Viro | 6b25539 | 2015-11-17 10:20:54 -0500 | [diff] [blame] | 1179 | .get_link = xfs_vn_get_link, |
Al Viro | 96c8c44 | 2013-11-29 22:54:55 -0500 | [diff] [blame] | 1180 | .put_link = kfree_put_link, |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 1181 | .getattr = xfs_vn_getattr, |
| 1182 | .setattr = xfs_vn_setattr, |
Lachlan McIlroy | 0ec5851 | 2008-06-23 13:23:01 +1000 | [diff] [blame] | 1183 | .setxattr = generic_setxattr, |
| 1184 | .getxattr = generic_getxattr, |
| 1185 | .removexattr = generic_removexattr, |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 1186 | .listxattr = xfs_vn_listxattr, |
Christoph Hellwig | 69ff282 | 2012-06-06 17:01:28 -0400 | [diff] [blame] | 1187 | .update_time = xfs_vn_update_time, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1188 | }; |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1189 | |
| 1190 | STATIC void |
| 1191 | xfs_diflags_to_iflags( |
| 1192 | struct inode *inode, |
| 1193 | struct xfs_inode *ip) |
| 1194 | { |
Dave Chinner | cbe4dab | 2015-06-04 09:19:18 +1000 | [diff] [blame] | 1195 | uint16_t flags = ip->i_d.di_flags; |
| 1196 | |
| 1197 | inode->i_flags &= ~(S_IMMUTABLE | S_APPEND | S_SYNC | |
| 1198 | S_NOATIME | S_DAX); |
| 1199 | |
| 1200 | if (flags & XFS_DIFLAG_IMMUTABLE) |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1201 | inode->i_flags |= S_IMMUTABLE; |
Dave Chinner | cbe4dab | 2015-06-04 09:19:18 +1000 | [diff] [blame] | 1202 | if (flags & XFS_DIFLAG_APPEND) |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1203 | inode->i_flags |= S_APPEND; |
Dave Chinner | cbe4dab | 2015-06-04 09:19:18 +1000 | [diff] [blame] | 1204 | if (flags & XFS_DIFLAG_SYNC) |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1205 | inode->i_flags |= S_SYNC; |
Dave Chinner | cbe4dab | 2015-06-04 09:19:18 +1000 | [diff] [blame] | 1206 | if (flags & XFS_DIFLAG_NOATIME) |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1207 | inode->i_flags |= S_NOATIME; |
Dave Chinner | cbe4dab | 2015-06-04 09:19:18 +1000 | [diff] [blame] | 1208 | /* XXX: Also needs an on-disk per inode flag! */ |
| 1209 | if (ip->i_mount->m_flags & XFS_MOUNT_DAX) |
| 1210 | inode->i_flags |= S_DAX; |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1211 | } |
| 1212 | |
| 1213 | /* |
Dave Chinner | 58c9047 | 2015-02-23 22:38:08 +1100 | [diff] [blame] | 1214 | * Initialize the Linux inode and set up the operation vectors. |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1215 | * |
Dave Chinner | 58c9047 | 2015-02-23 22:38:08 +1100 | [diff] [blame] | 1216 | * When reading existing inodes from disk this is called directly from xfs_iget, |
| 1217 | * when creating a new inode it is called from xfs_ialloc after setting up the |
| 1218 | * inode. These callers have different criteria for clearing XFS_INEW, so leave |
| 1219 | * it up to the caller to deal with unlocking the inode appropriately. |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1220 | */ |
| 1221 | void |
| 1222 | xfs_setup_inode( |
| 1223 | struct xfs_inode *ip) |
| 1224 | { |
David Chinner | bf90424 | 2008-10-30 17:36:14 +1100 | [diff] [blame] | 1225 | struct inode *inode = &ip->i_vnode; |
Dave Chinner | ad22c7a | 2013-10-29 22:11:57 +1100 | [diff] [blame] | 1226 | gfp_t gfp_mask; |
David Chinner | bf90424 | 2008-10-30 17:36:14 +1100 | [diff] [blame] | 1227 | |
| 1228 | inode->i_ino = ip->i_ino; |
Christoph Hellwig | eaff807 | 2009-12-17 14:25:01 +0100 | [diff] [blame] | 1229 | inode->i_state = I_NEW; |
Christoph Hellwig | 646ec46 | 2010-10-23 07:15:32 -0400 | [diff] [blame] | 1230 | |
| 1231 | inode_sb_list_add(inode); |
Christoph Hellwig | c6f6cd0 | 2010-11-06 11:43:08 +0000 | [diff] [blame] | 1232 | /* make the inode look hashed for the writeback code */ |
| 1233 | hlist_add_fake(&inode->i_hash); |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1234 | |
| 1235 | inode->i_mode = ip->i_d.di_mode; |
Miklos Szeredi | bfe8684 | 2011-10-28 14:13:29 +0200 | [diff] [blame] | 1236 | set_nlink(inode, ip->i_d.di_nlink); |
Dwight Engen | 7aab1b2 | 2013-08-15 14:08:01 -0400 | [diff] [blame] | 1237 | inode->i_uid = xfs_uid_to_kuid(ip->i_d.di_uid); |
| 1238 | inode->i_gid = xfs_gid_to_kgid(ip->i_d.di_gid); |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1239 | |
| 1240 | switch (inode->i_mode & S_IFMT) { |
| 1241 | case S_IFBLK: |
| 1242 | case S_IFCHR: |
| 1243 | inode->i_rdev = |
| 1244 | MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff, |
| 1245 | sysv_minor(ip->i_df.if_u2.if_rdev)); |
| 1246 | break; |
| 1247 | default: |
| 1248 | inode->i_rdev = 0; |
| 1249 | break; |
| 1250 | } |
| 1251 | |
| 1252 | inode->i_generation = ip->i_d.di_gen; |
| 1253 | i_size_write(inode, ip->i_d.di_size); |
| 1254 | inode->i_atime.tv_sec = ip->i_d.di_atime.t_sec; |
| 1255 | inode->i_atime.tv_nsec = ip->i_d.di_atime.t_nsec; |
| 1256 | inode->i_mtime.tv_sec = ip->i_d.di_mtime.t_sec; |
| 1257 | inode->i_mtime.tv_nsec = ip->i_d.di_mtime.t_nsec; |
| 1258 | inode->i_ctime.tv_sec = ip->i_d.di_ctime.t_sec; |
| 1259 | inode->i_ctime.tv_nsec = ip->i_d.di_ctime.t_nsec; |
| 1260 | xfs_diflags_to_iflags(inode, ip); |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1261 | |
Dave Chinner | 4bceb18 | 2013-10-29 22:11:51 +1100 | [diff] [blame] | 1262 | ip->d_ops = ip->i_mount->m_nondir_inode_ops; |
Dave Chinner | 93a8614 | 2014-02-27 16:51:39 +1100 | [diff] [blame] | 1263 | lockdep_set_class(&ip->i_lock.mr_lock, &xfs_nondir_ilock_class); |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1264 | switch (inode->i_mode & S_IFMT) { |
| 1265 | case S_IFREG: |
| 1266 | inode->i_op = &xfs_inode_operations; |
| 1267 | inode->i_fop = &xfs_file_operations; |
| 1268 | inode->i_mapping->a_ops = &xfs_address_space_operations; |
| 1269 | break; |
| 1270 | case S_IFDIR: |
Dave Chinner | 93a8614 | 2014-02-27 16:51:39 +1100 | [diff] [blame] | 1271 | lockdep_set_class(&ip->i_lock.mr_lock, &xfs_dir_ilock_class); |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1272 | if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb)) |
| 1273 | inode->i_op = &xfs_dir_ci_inode_operations; |
| 1274 | else |
| 1275 | inode->i_op = &xfs_dir_inode_operations; |
| 1276 | inode->i_fop = &xfs_dir_file_operations; |
Dave Chinner | 32c5483 | 2013-10-29 22:11:46 +1100 | [diff] [blame] | 1277 | ip->d_ops = ip->i_mount->m_dir_inode_ops; |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1278 | break; |
| 1279 | case S_IFLNK: |
| 1280 | inode->i_op = &xfs_symlink_inode_operations; |
| 1281 | if (!(ip->i_df.if_flags & XFS_IFINLINE)) |
| 1282 | inode->i_mapping->a_ops = &xfs_address_space_operations; |
| 1283 | break; |
| 1284 | default: |
| 1285 | inode->i_op = &xfs_inode_operations; |
| 1286 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
| 1287 | break; |
| 1288 | } |
| 1289 | |
Christoph Hellwig | 510792e | 2011-07-26 15:07:29 +0000 | [diff] [blame] | 1290 | /* |
Dave Chinner | ad22c7a | 2013-10-29 22:11:57 +1100 | [diff] [blame] | 1291 | * Ensure all page cache allocations are done from GFP_NOFS context to |
| 1292 | * prevent direct reclaim recursion back into the filesystem and blowing |
| 1293 | * stacks or deadlocking. |
| 1294 | */ |
| 1295 | gfp_mask = mapping_gfp_mask(inode->i_mapping); |
| 1296 | mapping_set_gfp_mask(inode->i_mapping, (gfp_mask & ~(__GFP_FS))); |
| 1297 | |
| 1298 | /* |
Christoph Hellwig | 510792e | 2011-07-26 15:07:29 +0000 | [diff] [blame] | 1299 | * If there is no attribute fork no ACL can exist on this inode, |
| 1300 | * and it can't have any file capabilities attached to it either. |
| 1301 | */ |
| 1302 | if (!XFS_IFORK_Q(ip)) { |
| 1303 | inode_has_no_xattr(inode); |
Christoph Hellwig | 6311b10 | 2011-07-23 17:36:50 +0200 | [diff] [blame] | 1304 | cache_no_acl(inode); |
Christoph Hellwig | 510792e | 2011-07-26 15:07:29 +0000 | [diff] [blame] | 1305 | } |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1306 | } |