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 | 70a9883 | 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" |
Christoph Hellwig | 68a9f5e | 2016-06-21 09:53:44 +1000 | [diff] [blame] | 41 | #include "xfs_iomap.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> |
Christoph Hellwig | ef14f0c | 2009-06-10 17:07:47 +0200 | [diff] [blame] | 45 | #include <linux/posix_acl.h> |
Nathan Scott | 446ada4 | 2006-01-11 15:35:44 +1100 | [diff] [blame] | 46 | #include <linux/security.h> |
Christoph Hellwig | d2bb140 | 2016-06-21 09:54:53 +1000 | [diff] [blame] | 47 | #include <linux/iomap.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 48 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | |
Dave Chinner | 93a8614 | 2014-02-27 16:51:39 +1100 | [diff] [blame] | 50 | /* |
| 51 | * Directories have different lock order w.r.t. mmap_sem compared to regular |
| 52 | * files. This is due to readdir potentially triggering page faults on a user |
| 53 | * buffer inside filldir(), and this happens with the ilock on the directory |
| 54 | * held. For regular files, the lock order is the other way around - the |
| 55 | * mmap_sem is taken during the page fault, and then we lock the ilock to do |
| 56 | * block mapping. Hence we need a different class for the directory ilock so |
| 57 | * that lockdep can tell them apart. |
| 58 | */ |
| 59 | static struct lock_class_key xfs_nondir_ilock_class; |
| 60 | static struct lock_class_key xfs_dir_ilock_class; |
| 61 | |
Dave Chinner | 8d2a5e6 | 2012-03-07 04:50:19 +0000 | [diff] [blame] | 62 | static int |
| 63 | xfs_initxattrs( |
| 64 | struct inode *inode, |
| 65 | const struct xattr *xattr_array, |
| 66 | void *fs_info) |
Mimi Zohar | 9d8f13b | 2011-06-06 15:29:25 -0400 | [diff] [blame] | 67 | { |
Dave Chinner | 8d2a5e6 | 2012-03-07 04:50:19 +0000 | [diff] [blame] | 68 | const struct xattr *xattr; |
| 69 | struct xfs_inode *ip = XFS_I(inode); |
| 70 | int error = 0; |
Mimi Zohar | 9d8f13b | 2011-06-06 15:29:25 -0400 | [diff] [blame] | 71 | |
| 72 | for (xattr = xattr_array; xattr->name != NULL; xattr++) { |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 73 | error = xfs_attr_set(ip, xattr->name, xattr->value, |
Dave Chinner | a5a14de | 2014-05-15 09:22:21 +1000 | [diff] [blame] | 74 | xattr->value_len, ATTR_SECURE); |
Mimi Zohar | 9d8f13b | 2011-06-06 15:29:25 -0400 | [diff] [blame] | 75 | if (error < 0) |
| 76 | break; |
| 77 | } |
| 78 | return error; |
| 79 | } |
| 80 | |
David Chinner | 5d51eff | 2007-11-23 16:29:18 +1100 | [diff] [blame] | 81 | /* |
Nathan Scott | 446ada4 | 2006-01-11 15:35:44 +1100 | [diff] [blame] | 82 | * Hook in SELinux. This is not quite correct yet, what we really need |
| 83 | * here (as we do for default ACLs) is a mechanism by which creation of |
| 84 | * these attrs can be journalled at inode creation time (along with the |
| 85 | * inode, of course, such that log replay can't cause these to be lost). |
| 86 | */ |
Mimi Zohar | 9d8f13b | 2011-06-06 15:29:25 -0400 | [diff] [blame] | 87 | |
Nathan Scott | 446ada4 | 2006-01-11 15:35:44 +1100 | [diff] [blame] | 88 | STATIC int |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 89 | xfs_init_security( |
Christoph Hellwig | af04819 | 2008-03-06 13:46:43 +1100 | [diff] [blame] | 90 | struct inode *inode, |
Eric Paris | 2a7dba3 | 2011-02-01 11:05:39 -0500 | [diff] [blame] | 91 | struct inode *dir, |
| 92 | const struct qstr *qstr) |
Nathan Scott | 446ada4 | 2006-01-11 15:35:44 +1100 | [diff] [blame] | 93 | { |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 94 | return security_inode_init_security(inode, dir, qstr, |
Dave Chinner | a5a14de | 2014-05-15 09:22:21 +1000 | [diff] [blame] | 95 | &xfs_initxattrs, NULL); |
Nathan Scott | 446ada4 | 2006-01-11 15:35:44 +1100 | [diff] [blame] | 96 | } |
| 97 | |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 98 | static void |
| 99 | xfs_dentry_to_name( |
| 100 | struct xfs_name *namep, |
Dave Chinner | 0cb9776 | 2013-08-12 20:50:09 +1000 | [diff] [blame] | 101 | struct dentry *dentry, |
| 102 | int mode) |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 103 | { |
| 104 | namep->name = dentry->d_name.name; |
| 105 | namep->len = dentry->d_name.len; |
Dave Chinner | 0cb9776 | 2013-08-12 20:50:09 +1000 | [diff] [blame] | 106 | namep->type = xfs_mode_to_ftype[(mode & S_IFMT) >> S_SHIFT]; |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 107 | } |
| 108 | |
David Chinner | 7989cb8 | 2007-02-10 18:34:56 +1100 | [diff] [blame] | 109 | STATIC void |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 110 | xfs_cleanup_inode( |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 111 | struct inode *dir, |
Christoph Hellwig | af04819 | 2008-03-06 13:46:43 +1100 | [diff] [blame] | 112 | struct inode *inode, |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 113 | struct dentry *dentry) |
Yingping Lu | 3a69c7d | 2006-02-01 12:14:34 +1100 | [diff] [blame] | 114 | { |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 115 | struct xfs_name teardown; |
Yingping Lu | 3a69c7d | 2006-02-01 12:14:34 +1100 | [diff] [blame] | 116 | |
| 117 | /* Oh, the horror. |
Nathan Scott | 220b528 | 2006-03-14 13:33:36 +1100 | [diff] [blame] | 118 | * If we can't add the ACL or we fail in |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 119 | * xfs_init_security we must back out. |
Yingping Lu | 3a69c7d | 2006-02-01 12:14:34 +1100 | [diff] [blame] | 120 | * ENOSPC can hit here, among other things. |
| 121 | */ |
Dave Chinner | 0cb9776 | 2013-08-12 20:50:09 +1000 | [diff] [blame] | 122 | xfs_dentry_to_name(&teardown, dentry, 0); |
Yingping Lu | 3a69c7d | 2006-02-01 12:14:34 +1100 | [diff] [blame] | 123 | |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 124 | xfs_remove(XFS_I(dir), &teardown, XFS_I(inode)); |
Yingping Lu | 3a69c7d | 2006-02-01 12:14:34 +1100 | [diff] [blame] | 125 | } |
| 126 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | STATIC int |
Brian Foster | d540e43 | 2014-05-06 07:34:28 +1000 | [diff] [blame] | 128 | xfs_generic_create( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | struct inode *dir, |
| 130 | struct dentry *dentry, |
Al Viro | 1a67aaf | 2011-07-26 01:52:52 -0400 | [diff] [blame] | 131 | umode_t mode, |
Brian Foster | d540e43 | 2014-05-06 07:34:28 +1000 | [diff] [blame] | 132 | dev_t rdev, |
| 133 | bool tmpfile) /* unnamed file */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | { |
Christoph Hellwig | db0bb7b | 2008-03-06 13:44:35 +1100 | [diff] [blame] | 135 | struct inode *inode; |
Christoph Hellwig | 979ebab | 2008-03-06 13:46:05 +1100 | [diff] [blame] | 136 | struct xfs_inode *ip = NULL; |
Christoph Hellwig | 2401dc2 | 2013-12-20 05:16:50 -0800 | [diff] [blame] | 137 | struct posix_acl *default_acl, *acl; |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 138 | struct xfs_name name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | int error; |
| 140 | |
| 141 | /* |
| 142 | * Irix uses Missed'em'V split, but doesn't want to see |
| 143 | * the upper 5 bits of (14bit) major. |
| 144 | */ |
Christoph Hellwig | 517b5e8 | 2009-02-09 08:38:02 +0100 | [diff] [blame] | 145 | if (S_ISCHR(mode) || S_ISBLK(mode)) { |
| 146 | if (unlikely(!sysv_valid_dev(rdev) || MAJOR(rdev) & ~0x1ff)) |
| 147 | return -EINVAL; |
| 148 | rdev = sysv_encode_dev(rdev); |
| 149 | } else { |
| 150 | rdev = 0; |
| 151 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | |
Christoph Hellwig | 2401dc2 | 2013-12-20 05:16:50 -0800 | [diff] [blame] | 153 | error = posix_acl_create(dir, &mode, &default_acl, &acl); |
| 154 | if (error) |
| 155 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | |
Brian Foster | d540e43 | 2014-05-06 07:34:28 +1000 | [diff] [blame] | 157 | if (!tmpfile) { |
| 158 | xfs_dentry_to_name(&name, dentry, mode); |
| 159 | error = xfs_create(XFS_I(dir), &name, mode, rdev, &ip); |
| 160 | } else { |
| 161 | error = xfs_create_tmpfile(XFS_I(dir), dentry, mode, &ip); |
| 162 | } |
Christoph Hellwig | db0bb7b | 2008-03-06 13:44:35 +1100 | [diff] [blame] | 163 | if (unlikely(error)) |
| 164 | goto out_free_acl; |
Nathan Scott | 446ada4 | 2006-01-11 15:35:44 +1100 | [diff] [blame] | 165 | |
David Chinner | 0165164 | 2008-08-13 15:45:15 +1000 | [diff] [blame] | 166 | inode = VFS_I(ip); |
Christoph Hellwig | 979ebab | 2008-03-06 13:46:05 +1100 | [diff] [blame] | 167 | |
Eric Paris | 2a7dba3 | 2011-02-01 11:05:39 -0500 | [diff] [blame] | 168 | error = xfs_init_security(inode, dir, &dentry->d_name); |
Christoph Hellwig | db0bb7b | 2008-03-06 13:44:35 +1100 | [diff] [blame] | 169 | if (unlikely(error)) |
| 170 | goto out_cleanup_inode; |
| 171 | |
Christoph Hellwig | 2401dc2 | 2013-12-20 05:16:50 -0800 | [diff] [blame] | 172 | #ifdef CONFIG_XFS_POSIX_ACL |
Christoph Hellwig | db0bb7b | 2008-03-06 13:44:35 +1100 | [diff] [blame] | 173 | if (default_acl) { |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 174 | error = xfs_set_acl(inode, default_acl, ACL_TYPE_DEFAULT); |
Christoph Hellwig | 2401dc2 | 2013-12-20 05:16:50 -0800 | [diff] [blame] | 175 | if (error) |
Christoph Hellwig | db0bb7b | 2008-03-06 13:44:35 +1100 | [diff] [blame] | 176 | goto out_cleanup_inode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | } |
Christoph Hellwig | 2401dc2 | 2013-12-20 05:16:50 -0800 | [diff] [blame] | 178 | if (acl) { |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 179 | error = xfs_set_acl(inode, acl, ACL_TYPE_ACCESS); |
Christoph Hellwig | 2401dc2 | 2013-12-20 05:16:50 -0800 | [diff] [blame] | 180 | if (error) |
| 181 | goto out_cleanup_inode; |
| 182 | } |
| 183 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | |
Christoph Hellwig | 2b3d1d4 | 2016-04-06 07:48:27 +1000 | [diff] [blame] | 185 | xfs_setup_iops(ip); |
| 186 | |
Brian Foster | d540e43 | 2014-05-06 07:34:28 +1000 | [diff] [blame] | 187 | if (tmpfile) |
| 188 | d_tmpfile(dentry, inode); |
| 189 | else |
| 190 | d_instantiate(dentry, inode); |
| 191 | |
Dave Chinner | 58c9047 | 2015-02-23 22:38:08 +1100 | [diff] [blame] | 192 | xfs_finish_inode_setup(ip); |
| 193 | |
Christoph Hellwig | 2401dc2 | 2013-12-20 05:16:50 -0800 | [diff] [blame] | 194 | out_free_acl: |
| 195 | if (default_acl) |
| 196 | posix_acl_release(default_acl); |
| 197 | if (acl) |
| 198 | posix_acl_release(acl); |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 199 | return error; |
Christoph Hellwig | db0bb7b | 2008-03-06 13:44:35 +1100 | [diff] [blame] | 200 | |
| 201 | out_cleanup_inode: |
Dave Chinner | 58c9047 | 2015-02-23 22:38:08 +1100 | [diff] [blame] | 202 | xfs_finish_inode_setup(ip); |
Brian Foster | d540e43 | 2014-05-06 07:34:28 +1000 | [diff] [blame] | 203 | if (!tmpfile) |
| 204 | xfs_cleanup_inode(dir, inode, dentry); |
| 205 | iput(inode); |
Christoph Hellwig | 2401dc2 | 2013-12-20 05:16:50 -0800 | [diff] [blame] | 206 | goto out_free_acl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | } |
| 208 | |
| 209 | STATIC int |
Brian Foster | d540e43 | 2014-05-06 07:34:28 +1000 | [diff] [blame] | 210 | xfs_vn_mknod( |
| 211 | struct inode *dir, |
| 212 | struct dentry *dentry, |
| 213 | umode_t mode, |
| 214 | dev_t rdev) |
| 215 | { |
| 216 | return xfs_generic_create(dir, dentry, mode, rdev, false); |
| 217 | } |
| 218 | |
| 219 | STATIC int |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 220 | xfs_vn_create( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | struct inode *dir, |
| 222 | struct dentry *dentry, |
Al Viro | 4acdaf2 | 2011-07-26 01:42:34 -0400 | [diff] [blame] | 223 | umode_t mode, |
Al Viro | ebfc3b4 | 2012-06-10 18:05:36 -0400 | [diff] [blame] | 224 | bool flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | { |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 226 | return xfs_vn_mknod(dir, dentry, mode, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | } |
| 228 | |
| 229 | STATIC int |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 230 | xfs_vn_mkdir( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 231 | struct inode *dir, |
| 232 | struct dentry *dentry, |
Al Viro | 18bb1db | 2011-07-26 01:41:39 -0400 | [diff] [blame] | 233 | umode_t mode) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | { |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 235 | return xfs_vn_mknod(dir, dentry, mode|S_IFDIR, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | } |
| 237 | |
| 238 | STATIC struct dentry * |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 239 | xfs_vn_lookup( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | struct inode *dir, |
| 241 | struct dentry *dentry, |
Al Viro | 00cd8dd | 2012-06-10 17:13:09 -0400 | [diff] [blame] | 242 | unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | { |
Christoph Hellwig | ef1f5e7 | 2008-03-06 13:46:25 +1100 | [diff] [blame] | 244 | struct xfs_inode *cip; |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 245 | struct xfs_name name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 246 | int error; |
| 247 | |
| 248 | if (dentry->d_name.len >= MAXNAMELEN) |
| 249 | return ERR_PTR(-ENAMETOOLONG); |
| 250 | |
Dave Chinner | 0cb9776 | 2013-08-12 20:50:09 +1000 | [diff] [blame] | 251 | xfs_dentry_to_name(&name, dentry, 0); |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 252 | error = xfs_lookup(XFS_I(dir), &name, &cip, NULL); |
Nathan Scott | 67fcaa7 | 2006-06-09 17:00:52 +1000 | [diff] [blame] | 253 | if (unlikely(error)) { |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 254 | if (unlikely(error != -ENOENT)) |
| 255 | return ERR_PTR(error); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 256 | d_add(dentry, NULL); |
| 257 | return NULL; |
| 258 | } |
| 259 | |
David Chinner | 0165164 | 2008-08-13 15:45:15 +1000 | [diff] [blame] | 260 | return d_splice_alias(VFS_I(cip), dentry); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | } |
| 262 | |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 263 | STATIC struct dentry * |
| 264 | xfs_vn_ci_lookup( |
| 265 | struct inode *dir, |
| 266 | struct dentry *dentry, |
Al Viro | 00cd8dd | 2012-06-10 17:13:09 -0400 | [diff] [blame] | 267 | unsigned int flags) |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 268 | { |
| 269 | struct xfs_inode *ip; |
| 270 | struct xfs_name xname; |
| 271 | struct xfs_name ci_name; |
| 272 | struct qstr dname; |
| 273 | int error; |
| 274 | |
| 275 | if (dentry->d_name.len >= MAXNAMELEN) |
| 276 | return ERR_PTR(-ENAMETOOLONG); |
| 277 | |
Dave Chinner | 0cb9776 | 2013-08-12 20:50:09 +1000 | [diff] [blame] | 278 | xfs_dentry_to_name(&xname, dentry, 0); |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 279 | error = xfs_lookup(XFS_I(dir), &xname, &ip, &ci_name); |
| 280 | if (unlikely(error)) { |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 281 | if (unlikely(error != -ENOENT)) |
| 282 | return ERR_PTR(error); |
Barry Naujok | 866d5dc | 2008-05-22 17:21:40 +1000 | [diff] [blame] | 283 | /* |
| 284 | * call d_add(dentry, NULL) here when d_drop_negative_children |
| 285 | * is called in xfs_vn_mknod (ie. allow negative dentries |
| 286 | * with CI filesystems). |
| 287 | */ |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 288 | return NULL; |
| 289 | } |
| 290 | |
| 291 | /* if exact match, just splice and exit */ |
| 292 | if (!ci_name.name) |
David Chinner | 0165164 | 2008-08-13 15:45:15 +1000 | [diff] [blame] | 293 | return d_splice_alias(VFS_I(ip), dentry); |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 294 | |
| 295 | /* else case-insensitive match... */ |
| 296 | dname.name = ci_name.name; |
| 297 | dname.len = ci_name.len; |
Christoph Hellwig | e45b590 | 2008-08-07 23:49:07 +0200 | [diff] [blame] | 298 | dentry = d_add_ci(dentry, VFS_I(ip), &dname); |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 299 | kmem_free(ci_name.name); |
| 300 | return dentry; |
| 301 | } |
| 302 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | STATIC int |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 304 | xfs_vn_link( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | struct dentry *old_dentry, |
| 306 | struct inode *dir, |
| 307 | struct dentry *dentry) |
| 308 | { |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 309 | struct inode *inode = d_inode(old_dentry); |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 310 | struct xfs_name name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 311 | int error; |
| 312 | |
Dave Chinner | 0cb9776 | 2013-08-12 20:50:09 +1000 | [diff] [blame] | 313 | xfs_dentry_to_name(&name, dentry, inode->i_mode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 314 | |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 315 | error = xfs_link(XFS_I(dir), XFS_I(inode), &name); |
Christoph Hellwig | d9424b3 | 2008-12-03 12:20:27 +0100 | [diff] [blame] | 316 | if (unlikely(error)) |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 317 | return error; |
Christoph Hellwig | a3da789 | 2008-03-06 13:46:12 +1100 | [diff] [blame] | 318 | |
Al Viro | 7de9c6ee | 2010-10-23 11:11:40 -0400 | [diff] [blame] | 319 | ihold(inode); |
Christoph Hellwig | a3da789 | 2008-03-06 13:46:12 +1100 | [diff] [blame] | 320 | d_instantiate(dentry, inode); |
| 321 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | } |
| 323 | |
| 324 | STATIC int |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 325 | xfs_vn_unlink( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | struct inode *dir, |
| 327 | struct dentry *dentry) |
| 328 | { |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 329 | struct xfs_name name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | int error; |
| 331 | |
Dave Chinner | 0cb9776 | 2013-08-12 20:50:09 +1000 | [diff] [blame] | 332 | xfs_dentry_to_name(&name, dentry, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 334 | error = xfs_remove(XFS_I(dir), &name, XFS_I(d_inode(dentry))); |
Christoph Hellwig | e570070 | 2008-06-23 13:25:25 +1000 | [diff] [blame] | 335 | if (error) |
| 336 | return error; |
| 337 | |
| 338 | /* |
| 339 | * With unlink, the VFS makes the dentry "negative": no inode, |
| 340 | * but still hashed. This is incompatible with case-insensitive |
| 341 | * mode, so invalidate (unhash) the dentry in CI-mode. |
| 342 | */ |
| 343 | if (xfs_sb_version_hasasciici(&XFS_M(dir->i_sb)->m_sb)) |
| 344 | d_invalidate(dentry); |
| 345 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 346 | } |
| 347 | |
| 348 | STATIC int |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 349 | xfs_vn_symlink( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | struct inode *dir, |
| 351 | struct dentry *dentry, |
| 352 | const char *symname) |
| 353 | { |
Christoph Hellwig | 3937be5 | 2008-03-06 13:46:19 +1100 | [diff] [blame] | 354 | struct inode *inode; |
| 355 | struct xfs_inode *cip = NULL; |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 356 | struct xfs_name name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 357 | int error; |
Al Viro | 576b1d6 | 2011-07-26 02:50:15 -0400 | [diff] [blame] | 358 | umode_t mode; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | |
Christoph Hellwig | 3e5daf0 | 2007-10-11 18:09:12 +1000 | [diff] [blame] | 360 | mode = S_IFLNK | |
Al Viro | ce3b0f8 | 2009-03-29 19:08:22 -0400 | [diff] [blame] | 361 | (irix_symlink_mode ? 0777 & ~current_umask() : S_IRWXUGO); |
Dave Chinner | 0cb9776 | 2013-08-12 20:50:09 +1000 | [diff] [blame] | 362 | xfs_dentry_to_name(&name, dentry, mode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | |
Christoph Hellwig | 6c77b0e | 2010-10-06 18:41:17 +0000 | [diff] [blame] | 364 | error = xfs_symlink(XFS_I(dir), &name, symname, mode, &cip); |
Christoph Hellwig | 3937be5 | 2008-03-06 13:46:19 +1100 | [diff] [blame] | 365 | if (unlikely(error)) |
| 366 | goto out; |
| 367 | |
David Chinner | 0165164 | 2008-08-13 15:45:15 +1000 | [diff] [blame] | 368 | inode = VFS_I(cip); |
Christoph Hellwig | 3937be5 | 2008-03-06 13:46:19 +1100 | [diff] [blame] | 369 | |
Eric Paris | 2a7dba3 | 2011-02-01 11:05:39 -0500 | [diff] [blame] | 370 | error = xfs_init_security(inode, dir, &dentry->d_name); |
Christoph Hellwig | 3937be5 | 2008-03-06 13:46:19 +1100 | [diff] [blame] | 371 | if (unlikely(error)) |
| 372 | goto out_cleanup_inode; |
| 373 | |
Christoph Hellwig | 2b3d1d4 | 2016-04-06 07:48:27 +1000 | [diff] [blame] | 374 | xfs_setup_iops(cip); |
| 375 | |
Christoph Hellwig | 3937be5 | 2008-03-06 13:46:19 +1100 | [diff] [blame] | 376 | d_instantiate(dentry, inode); |
Dave Chinner | 58c9047 | 2015-02-23 22:38:08 +1100 | [diff] [blame] | 377 | xfs_finish_inode_setup(cip); |
Christoph Hellwig | 3937be5 | 2008-03-06 13:46:19 +1100 | [diff] [blame] | 378 | return 0; |
| 379 | |
| 380 | out_cleanup_inode: |
Dave Chinner | 58c9047 | 2015-02-23 22:38:08 +1100 | [diff] [blame] | 381 | xfs_finish_inode_setup(cip); |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 382 | xfs_cleanup_inode(dir, inode, dentry); |
Brian Foster | d540e43 | 2014-05-06 07:34:28 +1000 | [diff] [blame] | 383 | iput(inode); |
Christoph Hellwig | 3937be5 | 2008-03-06 13:46:19 +1100 | [diff] [blame] | 384 | out: |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 385 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 386 | } |
| 387 | |
| 388 | STATIC int |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 389 | xfs_vn_rename( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | struct inode *odir, |
| 391 | struct dentry *odentry, |
| 392 | struct inode *ndir, |
Carlos Maiolino | dbe1b5c | 2014-12-24 08:51:38 +1100 | [diff] [blame] | 393 | struct dentry *ndentry, |
| 394 | unsigned int flags) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 395 | { |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 396 | struct inode *new_inode = d_inode(ndentry); |
Carlos Maiolino | d31a182 | 2014-12-24 08:51:42 +1100 | [diff] [blame] | 397 | int omode = 0; |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 398 | struct xfs_name oname; |
| 399 | struct xfs_name nname; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | |
Dave Chinner | 7dcf5c3 | 2015-03-25 14:08:08 +1100 | [diff] [blame] | 401 | if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT)) |
Carlos Maiolino | dbe1b5c | 2014-12-24 08:51:38 +1100 | [diff] [blame] | 402 | return -EINVAL; |
| 403 | |
Carlos Maiolino | d31a182 | 2014-12-24 08:51:42 +1100 | [diff] [blame] | 404 | /* if we are exchanging files, we need to set i_mode of both files */ |
| 405 | if (flags & RENAME_EXCHANGE) |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 406 | omode = d_inode(ndentry)->i_mode; |
Carlos Maiolino | d31a182 | 2014-12-24 08:51:42 +1100 | [diff] [blame] | 407 | |
| 408 | xfs_dentry_to_name(&oname, odentry, omode); |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 409 | xfs_dentry_to_name(&nname, ndentry, d_inode(odentry)->i_mode); |
Barry Naujok | 556b8b1 | 2008-04-10 12:22:07 +1000 | [diff] [blame] | 410 | |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 411 | return xfs_rename(XFS_I(odir), &oname, XFS_I(d_inode(odentry)), |
Carlos Maiolino | dbe1b5c | 2014-12-24 08:51:38 +1100 | [diff] [blame] | 412 | XFS_I(ndir), &nname, |
Carlos Maiolino | d31a182 | 2014-12-24 08:51:42 +1100 | [diff] [blame] | 413 | new_inode ? XFS_I(new_inode) : NULL, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | } |
| 415 | |
| 416 | /* |
| 417 | * careful here - this function can get called recursively, so |
| 418 | * we need to be very careful about how much stack we use. |
| 419 | * uio is kmalloced for this reason... |
| 420 | */ |
Al Viro | 680baac | 2015-05-02 13:32:22 -0400 | [diff] [blame] | 421 | STATIC const char * |
Al Viro | 6b25539 | 2015-11-17 10:20:54 -0500 | [diff] [blame] | 422 | xfs_vn_get_link( |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | struct dentry *dentry, |
Al Viro | 6b25539 | 2015-11-17 10:20:54 -0500 | [diff] [blame] | 424 | struct inode *inode, |
Al Viro | fceef39 | 2015-12-29 15:58:39 -0500 | [diff] [blame] | 425 | struct delayed_call *done) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | char *link; |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 428 | int error = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 429 | |
Al Viro | 6b25539 | 2015-11-17 10:20:54 -0500 | [diff] [blame] | 430 | if (!dentry) |
| 431 | return ERR_PTR(-ECHILD); |
| 432 | |
Panagiotis Issaris | f52720c | 2006-09-27 01:49:39 -0700 | [diff] [blame] | 433 | link = kmalloc(MAXPATHLEN+1, GFP_KERNEL); |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 434 | if (!link) |
| 435 | goto out_err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 437 | error = xfs_readlink(XFS_I(d_inode(dentry)), link); |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 438 | if (unlikely(error)) |
| 439 | goto out_kfree; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 440 | |
Al Viro | fceef39 | 2015-12-29 15:58:39 -0500 | [diff] [blame] | 441 | set_delayed_call(done, kfree_link, link); |
| 442 | return link; |
Christoph Hellwig | 804c83c | 2007-08-28 13:59:03 +1000 | [diff] [blame] | 443 | |
| 444 | out_kfree: |
| 445 | kfree(link); |
| 446 | out_err: |
Al Viro | 680baac | 2015-05-02 13:32:22 -0400 | [diff] [blame] | 447 | return ERR_PTR(error); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 448 | } |
| 449 | |
Christoph Hellwig | 30ee052 | 2016-04-06 07:53:29 +1000 | [diff] [blame] | 450 | STATIC const char * |
| 451 | xfs_vn_get_link_inline( |
| 452 | struct dentry *dentry, |
| 453 | struct inode *inode, |
| 454 | struct delayed_call *done) |
| 455 | { |
| 456 | ASSERT(XFS_I(inode)->i_df.if_flags & XFS_IFINLINE); |
| 457 | return XFS_I(inode)->i_df.if_u1.if_data; |
| 458 | } |
| 459 | |
Christoph Hellwig | 4576758 | 2008-02-05 12:13:24 +1100 | [diff] [blame] | 460 | STATIC int |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 461 | xfs_vn_getattr( |
Christoph Hellwig | c43f408 | 2007-10-11 17:46:39 +1000 | [diff] [blame] | 462 | struct vfsmount *mnt, |
| 463 | struct dentry *dentry, |
| 464 | struct kstat *stat) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 465 | { |
David Howells | 2b0143b | 2015-03-17 22:25:59 +0000 | [diff] [blame] | 466 | struct inode *inode = d_inode(dentry); |
Christoph Hellwig | c43f408 | 2007-10-11 17:46:39 +1000 | [diff] [blame] | 467 | struct xfs_inode *ip = XFS_I(inode); |
| 468 | struct xfs_mount *mp = ip->i_mount; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | |
Christoph Hellwig | cca28fb | 2010-06-24 11:57:09 +1000 | [diff] [blame] | 470 | trace_xfs_getattr(ip); |
Christoph Hellwig | c43f408 | 2007-10-11 17:46:39 +1000 | [diff] [blame] | 471 | |
| 472 | if (XFS_FORCED_SHUTDOWN(mp)) |
Eric Sandeen | b474c7a | 2014-06-22 15:04:54 +1000 | [diff] [blame] | 473 | return -EIO; |
Christoph Hellwig | c43f408 | 2007-10-11 17:46:39 +1000 | [diff] [blame] | 474 | |
| 475 | stat->size = XFS_ISIZE(ip); |
| 476 | stat->dev = inode->i_sb->s_dev; |
Dave Chinner | c19b3b05 | 2016-02-09 16:54:58 +1100 | [diff] [blame] | 477 | stat->mode = inode->i_mode; |
Dave Chinner | 54d7b5c | 2016-02-09 16:54:58 +1100 | [diff] [blame] | 478 | stat->nlink = inode->i_nlink; |
Dwight Engen | 7aab1b2 | 2013-08-15 14:08:01 -0400 | [diff] [blame] | 479 | stat->uid = inode->i_uid; |
| 480 | stat->gid = inode->i_gid; |
Christoph Hellwig | c43f408 | 2007-10-11 17:46:39 +1000 | [diff] [blame] | 481 | stat->ino = ip->i_ino; |
Christoph Hellwig | c43f408 | 2007-10-11 17:46:39 +1000 | [diff] [blame] | 482 | stat->atime = inode->i_atime; |
Christoph Hellwig | f9581b1 | 2009-10-06 20:29:26 +0000 | [diff] [blame] | 483 | stat->mtime = inode->i_mtime; |
| 484 | stat->ctime = inode->i_ctime; |
Christoph Hellwig | c43f408 | 2007-10-11 17:46:39 +1000 | [diff] [blame] | 485 | stat->blocks = |
| 486 | XFS_FSB_TO_BB(mp, ip->i_d.di_nblocks + ip->i_delayed_blks); |
| 487 | |
| 488 | |
| 489 | switch (inode->i_mode & S_IFMT) { |
| 490 | case S_IFBLK: |
| 491 | case S_IFCHR: |
| 492 | stat->blksize = BLKDEV_IOSIZE; |
| 493 | stat->rdev = MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff, |
| 494 | sysv_minor(ip->i_df.if_u2.if_rdev)); |
| 495 | break; |
| 496 | default: |
Eric Sandeen | 71ddabb | 2007-11-23 16:29:42 +1100 | [diff] [blame] | 497 | if (XFS_IS_REALTIME_INODE(ip)) { |
Christoph Hellwig | c43f408 | 2007-10-11 17:46:39 +1000 | [diff] [blame] | 498 | /* |
| 499 | * If the file blocks are being allocated from a |
| 500 | * realtime volume, then return the inode's realtime |
| 501 | * extent size or the realtime volume's extent size. |
| 502 | */ |
| 503 | stat->blksize = |
| 504 | xfs_get_extsz_hint(ip) << mp->m_sb.sb_blocklog; |
| 505 | } else |
| 506 | stat->blksize = xfs_preferred_iosize(mp); |
| 507 | stat->rdev = 0; |
| 508 | break; |
Nathan Scott | 69e23b9 | 2006-09-28 11:01:22 +1000 | [diff] [blame] | 509 | } |
Christoph Hellwig | c43f408 | 2007-10-11 17:46:39 +1000 | [diff] [blame] | 510 | |
| 511 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 512 | } |
| 513 | |
Dave Chinner | 56c19e8 | 2013-05-27 16:38:25 +1000 | [diff] [blame] | 514 | static void |
| 515 | xfs_setattr_mode( |
Dave Chinner | 56c19e8 | 2013-05-27 16:38:25 +1000 | [diff] [blame] | 516 | struct xfs_inode *ip, |
| 517 | struct iattr *iattr) |
| 518 | { |
Christoph Hellwig | 0c3d88d | 2013-11-18 05:10:40 -0800 | [diff] [blame] | 519 | struct inode *inode = VFS_I(ip); |
| 520 | umode_t mode = iattr->ia_mode; |
Dave Chinner | 56c19e8 | 2013-05-27 16:38:25 +1000 | [diff] [blame] | 521 | |
Dave Chinner | 56c19e8 | 2013-05-27 16:38:25 +1000 | [diff] [blame] | 522 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
| 523 | |
Dave Chinner | 56c19e8 | 2013-05-27 16:38:25 +1000 | [diff] [blame] | 524 | inode->i_mode &= S_IFMT; |
| 525 | inode->i_mode |= mode & ~S_IFMT; |
| 526 | } |
| 527 | |
Christoph Hellwig | 5278511 | 2015-02-16 11:49:23 +1100 | [diff] [blame] | 528 | void |
Christoph Hellwig | c91c46c | 2013-11-18 05:10:52 -0800 | [diff] [blame] | 529 | xfs_setattr_time( |
| 530 | struct xfs_inode *ip, |
| 531 | struct iattr *iattr) |
| 532 | { |
| 533 | struct inode *inode = VFS_I(ip); |
| 534 | |
| 535 | ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL)); |
| 536 | |
Dave Chinner | 3987848 | 2016-02-09 16:54:58 +1100 | [diff] [blame] | 537 | if (iattr->ia_valid & ATTR_ATIME) |
Christoph Hellwig | c91c46c | 2013-11-18 05:10:52 -0800 | [diff] [blame] | 538 | inode->i_atime = iattr->ia_atime; |
Dave Chinner | 3987848 | 2016-02-09 16:54:58 +1100 | [diff] [blame] | 539 | if (iattr->ia_valid & ATTR_CTIME) |
Christoph Hellwig | c91c46c | 2013-11-18 05:10:52 -0800 | [diff] [blame] | 540 | inode->i_ctime = iattr->ia_ctime; |
Dave Chinner | 3987848 | 2016-02-09 16:54:58 +1100 | [diff] [blame] | 541 | if (iattr->ia_valid & ATTR_MTIME) |
Christoph Hellwig | c91c46c | 2013-11-18 05:10:52 -0800 | [diff] [blame] | 542 | inode->i_mtime = iattr->ia_mtime; |
Christoph Hellwig | c91c46c | 2013-11-18 05:10:52 -0800 | [diff] [blame] | 543 | } |
| 544 | |
Jan Kara | 69bca80 | 2016-05-26 14:46:43 +0200 | [diff] [blame] | 545 | static int |
| 546 | xfs_vn_change_ok( |
| 547 | struct dentry *dentry, |
| 548 | struct iattr *iattr) |
| 549 | { |
Jan Kara | 31051c8 | 2016-05-26 16:55:18 +0200 | [diff] [blame^] | 550 | struct xfs_mount *mp = XFS_I(d_inode(dentry))->i_mount; |
Jan Kara | 69bca80 | 2016-05-26 14:46:43 +0200 | [diff] [blame] | 551 | |
| 552 | if (mp->m_flags & XFS_MOUNT_RDONLY) |
| 553 | return -EROFS; |
| 554 | |
| 555 | if (XFS_FORCED_SHUTDOWN(mp)) |
| 556 | return -EIO; |
| 557 | |
Jan Kara | 31051c8 | 2016-05-26 16:55:18 +0200 | [diff] [blame^] | 558 | return setattr_prepare(dentry, iattr); |
Jan Kara | 69bca80 | 2016-05-26 14:46:43 +0200 | [diff] [blame] | 559 | } |
| 560 | |
| 561 | /* |
| 562 | * Set non-size attributes of an inode. |
| 563 | * |
| 564 | * Caution: The caller of this function is responsible for calling |
Jan Kara | 31051c8 | 2016-05-26 16:55:18 +0200 | [diff] [blame^] | 565 | * setattr_prepare() or otherwise verifying the change is fine. |
Jan Kara | 69bca80 | 2016-05-26 14:46:43 +0200 | [diff] [blame] | 566 | */ |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 567 | int |
| 568 | xfs_setattr_nonsize( |
| 569 | struct xfs_inode *ip, |
| 570 | struct iattr *iattr, |
| 571 | int flags) |
| 572 | { |
| 573 | xfs_mount_t *mp = ip->i_mount; |
| 574 | struct inode *inode = VFS_I(ip); |
| 575 | int mask = iattr->ia_valid; |
| 576 | xfs_trans_t *tp; |
| 577 | int error; |
Dwight Engen | 7aab1b2 | 2013-08-15 14:08:01 -0400 | [diff] [blame] | 578 | kuid_t uid = GLOBAL_ROOT_UID, iuid = GLOBAL_ROOT_UID; |
| 579 | kgid_t gid = GLOBAL_ROOT_GID, igid = GLOBAL_ROOT_GID; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 580 | struct xfs_dquot *udqp = NULL, *gdqp = NULL; |
| 581 | struct xfs_dquot *olddquot1 = NULL, *olddquot2 = NULL; |
| 582 | |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 583 | ASSERT((mask & ATTR_SIZE) == 0); |
| 584 | |
| 585 | /* |
| 586 | * If disk quotas is on, we make sure that the dquots do exist on disk, |
| 587 | * before we start any other transactions. Trying to do this later |
| 588 | * is messy. We don't care to take a readlock to look at the ids |
| 589 | * in inode here, because we can't hold it across the trans_reserve. |
| 590 | * If the IDs do change before we take the ilock, we're covered |
| 591 | * because the i_*dquot fields will get updated anyway. |
| 592 | */ |
| 593 | if (XFS_IS_QUOTA_ON(mp) && (mask & (ATTR_UID|ATTR_GID))) { |
| 594 | uint qflags = 0; |
| 595 | |
| 596 | if ((mask & ATTR_UID) && XFS_IS_UQUOTA_ON(mp)) { |
| 597 | uid = iattr->ia_uid; |
| 598 | qflags |= XFS_QMOPT_UQUOTA; |
| 599 | } else { |
Dwight Engen | 7aab1b2 | 2013-08-15 14:08:01 -0400 | [diff] [blame] | 600 | uid = inode->i_uid; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 601 | } |
| 602 | if ((mask & ATTR_GID) && XFS_IS_GQUOTA_ON(mp)) { |
| 603 | gid = iattr->ia_gid; |
| 604 | qflags |= XFS_QMOPT_GQUOTA; |
| 605 | } else { |
Dwight Engen | 7aab1b2 | 2013-08-15 14:08:01 -0400 | [diff] [blame] | 606 | gid = inode->i_gid; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 607 | } |
| 608 | |
| 609 | /* |
| 610 | * We take a reference when we initialize udqp and gdqp, |
| 611 | * so it is important that we never blindly double trip on |
| 612 | * the same variable. See xfs_create() for an example. |
| 613 | */ |
| 614 | ASSERT(udqp == NULL); |
| 615 | ASSERT(gdqp == NULL); |
Dwight Engen | 7aab1b2 | 2013-08-15 14:08:01 -0400 | [diff] [blame] | 616 | error = xfs_qm_vop_dqalloc(ip, xfs_kuid_to_uid(uid), |
| 617 | xfs_kgid_to_gid(gid), |
| 618 | xfs_get_projid(ip), |
| 619 | qflags, &udqp, &gdqp, NULL); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 620 | if (error) |
| 621 | return error; |
| 622 | } |
| 623 | |
Christoph Hellwig | 253f491 | 2016-04-06 09:19:55 +1000 | [diff] [blame] | 624 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 625 | if (error) |
Christoph Hellwig | 253f491 | 2016-04-06 09:19:55 +1000 | [diff] [blame] | 626 | goto out_dqrele; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 627 | |
| 628 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
Christoph Hellwig | 253f491 | 2016-04-06 09:19:55 +1000 | [diff] [blame] | 629 | xfs_trans_ijoin(tp, ip, 0); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 630 | |
| 631 | /* |
| 632 | * Change file ownership. Must be the owner or privileged. |
| 633 | */ |
| 634 | if (mask & (ATTR_UID|ATTR_GID)) { |
| 635 | /* |
| 636 | * These IDs could have changed since we last looked at them. |
| 637 | * But, we're assured that if the ownership did change |
| 638 | * while we didn't have the inode locked, inode's dquot(s) |
| 639 | * would have changed also. |
| 640 | */ |
Dwight Engen | 7aab1b2 | 2013-08-15 14:08:01 -0400 | [diff] [blame] | 641 | iuid = inode->i_uid; |
| 642 | igid = inode->i_gid; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 643 | gid = (mask & ATTR_GID) ? iattr->ia_gid : igid; |
| 644 | uid = (mask & ATTR_UID) ? iattr->ia_uid : iuid; |
| 645 | |
| 646 | /* |
| 647 | * Do a quota reservation only if uid/gid is actually |
| 648 | * going to change. |
| 649 | */ |
| 650 | if (XFS_IS_QUOTA_RUNNING(mp) && |
Dwight Engen | 7aab1b2 | 2013-08-15 14:08:01 -0400 | [diff] [blame] | 651 | ((XFS_IS_UQUOTA_ON(mp) && !uid_eq(iuid, uid)) || |
| 652 | (XFS_IS_GQUOTA_ON(mp) && !gid_eq(igid, gid)))) { |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 653 | ASSERT(tp); |
| 654 | error = xfs_qm_vop_chown_reserve(tp, ip, udqp, gdqp, |
Chandra Seetharaman | 92f8ff7 | 2013-07-11 00:00:40 -0500 | [diff] [blame] | 655 | NULL, capable(CAP_FOWNER) ? |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 656 | XFS_QMOPT_FORCE_RES : 0); |
| 657 | if (error) /* out of quota */ |
Christoph Hellwig | 253f491 | 2016-04-06 09:19:55 +1000 | [diff] [blame] | 658 | goto out_cancel; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 659 | } |
| 660 | } |
| 661 | |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 662 | /* |
| 663 | * Change file ownership. Must be the owner or privileged. |
| 664 | */ |
| 665 | if (mask & (ATTR_UID|ATTR_GID)) { |
| 666 | /* |
| 667 | * CAP_FSETID overrides the following restrictions: |
| 668 | * |
| 669 | * The set-user-ID and set-group-ID bits of a file will be |
| 670 | * cleared upon successful return from chown() |
| 671 | */ |
Dave Chinner | c19b3b05 | 2016-02-09 16:54:58 +1100 | [diff] [blame] | 672 | if ((inode->i_mode & (S_ISUID|S_ISGID)) && |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 673 | !capable(CAP_FSETID)) |
Dave Chinner | c19b3b05 | 2016-02-09 16:54:58 +1100 | [diff] [blame] | 674 | inode->i_mode &= ~(S_ISUID|S_ISGID); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 675 | |
| 676 | /* |
| 677 | * Change the ownerships and register quota modifications |
| 678 | * in the transaction. |
| 679 | */ |
Dwight Engen | 7aab1b2 | 2013-08-15 14:08:01 -0400 | [diff] [blame] | 680 | if (!uid_eq(iuid, uid)) { |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 681 | if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_UQUOTA_ON(mp)) { |
| 682 | ASSERT(mask & ATTR_UID); |
| 683 | ASSERT(udqp); |
| 684 | olddquot1 = xfs_qm_vop_chown(tp, ip, |
| 685 | &ip->i_udquot, udqp); |
| 686 | } |
Dwight Engen | 7aab1b2 | 2013-08-15 14:08:01 -0400 | [diff] [blame] | 687 | ip->i_d.di_uid = xfs_kuid_to_uid(uid); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 688 | inode->i_uid = uid; |
| 689 | } |
Dwight Engen | 7aab1b2 | 2013-08-15 14:08:01 -0400 | [diff] [blame] | 690 | if (!gid_eq(igid, gid)) { |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 691 | if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_GQUOTA_ON(mp)) { |
Jie Liu | 5a01dd5 | 2013-11-26 21:38:34 +0800 | [diff] [blame] | 692 | ASSERT(xfs_sb_version_has_pquotino(&mp->m_sb) || |
| 693 | !XFS_IS_PQUOTA_ON(mp)); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 694 | ASSERT(mask & ATTR_GID); |
| 695 | ASSERT(gdqp); |
| 696 | olddquot2 = xfs_qm_vop_chown(tp, ip, |
| 697 | &ip->i_gdquot, gdqp); |
| 698 | } |
Dwight Engen | 7aab1b2 | 2013-08-15 14:08:01 -0400 | [diff] [blame] | 699 | ip->i_d.di_gid = xfs_kgid_to_gid(gid); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 700 | inode->i_gid = gid; |
| 701 | } |
| 702 | } |
| 703 | |
Dave Chinner | 56c19e8 | 2013-05-27 16:38:25 +1000 | [diff] [blame] | 704 | if (mask & ATTR_MODE) |
Christoph Hellwig | 0c3d88d | 2013-11-18 05:10:40 -0800 | [diff] [blame] | 705 | xfs_setattr_mode(ip, iattr); |
Christoph Hellwig | c91c46c | 2013-11-18 05:10:52 -0800 | [diff] [blame] | 706 | if (mask & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME)) |
| 707 | xfs_setattr_time(ip, iattr); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 708 | |
| 709 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| 710 | |
Bill O'Donnell | ff6d6af | 2015-10-12 18:21:22 +1100 | [diff] [blame] | 711 | XFS_STATS_INC(mp, xs_ig_attrchg); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 712 | |
| 713 | if (mp->m_flags & XFS_MOUNT_WSYNC) |
| 714 | xfs_trans_set_sync(tp); |
Christoph Hellwig | 7039331 | 2015-06-04 13:48:08 +1000 | [diff] [blame] | 715 | error = xfs_trans_commit(tp); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 716 | |
| 717 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| 718 | |
| 719 | /* |
| 720 | * Release any dquot(s) the inode had kept before chown. |
| 721 | */ |
| 722 | xfs_qm_dqrele(olddquot1); |
| 723 | xfs_qm_dqrele(olddquot2); |
| 724 | xfs_qm_dqrele(udqp); |
| 725 | xfs_qm_dqrele(gdqp); |
| 726 | |
| 727 | if (error) |
Eric Sandeen | b474c7a | 2014-06-22 15:04:54 +1000 | [diff] [blame] | 728 | return error; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 729 | |
| 730 | /* |
| 731 | * XXX(hch): Updating the ACL entries is not atomic vs the i_mode |
| 732 | * update. We could avoid this with linked transactions |
| 733 | * and passing down the transaction pointer all the way |
| 734 | * to attr_set. No previous user of the generic |
| 735 | * Posix ACL code seems to care about this issue either. |
| 736 | */ |
| 737 | if ((mask & ATTR_MODE) && !(flags & XFS_ATTR_NOACL)) { |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 738 | error = posix_acl_chmod(inode, inode->i_mode); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 739 | if (error) |
Eric Sandeen | b474c7a | 2014-06-22 15:04:54 +1000 | [diff] [blame] | 740 | return error; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 741 | } |
| 742 | |
| 743 | return 0; |
| 744 | |
Christoph Hellwig | 253f491 | 2016-04-06 09:19:55 +1000 | [diff] [blame] | 745 | out_cancel: |
Christoph Hellwig | 4906e21 | 2015-06-04 13:47:56 +1000 | [diff] [blame] | 746 | xfs_trans_cancel(tp); |
Christoph Hellwig | 253f491 | 2016-04-06 09:19:55 +1000 | [diff] [blame] | 747 | out_dqrele: |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 748 | xfs_qm_dqrele(udqp); |
| 749 | xfs_qm_dqrele(gdqp); |
| 750 | return error; |
| 751 | } |
| 752 | |
Jan Kara | 69bca80 | 2016-05-26 14:46:43 +0200 | [diff] [blame] | 753 | int |
| 754 | xfs_vn_setattr_nonsize( |
| 755 | struct dentry *dentry, |
| 756 | struct iattr *iattr) |
| 757 | { |
| 758 | struct xfs_inode *ip = XFS_I(d_inode(dentry)); |
| 759 | int error; |
| 760 | |
| 761 | trace_xfs_setattr(ip); |
| 762 | |
| 763 | error = xfs_vn_change_ok(dentry, iattr); |
| 764 | if (error) |
| 765 | return error; |
| 766 | return xfs_setattr_nonsize(ip, iattr, 0); |
| 767 | } |
| 768 | |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 769 | /* |
| 770 | * Truncate file. Must have write permission and not be a directory. |
Jan Kara | 69bca80 | 2016-05-26 14:46:43 +0200 | [diff] [blame] | 771 | * |
| 772 | * Caution: The caller of this function is responsible for calling |
Jan Kara | 31051c8 | 2016-05-26 16:55:18 +0200 | [diff] [blame^] | 773 | * setattr_prepare() or otherwise verifying the change is fine. |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 774 | */ |
| 775 | int |
| 776 | xfs_setattr_size( |
| 777 | struct xfs_inode *ip, |
Christoph Hellwig | 76ca4c2 | 2013-10-14 07:09:35 -0700 | [diff] [blame] | 778 | struct iattr *iattr) |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 779 | { |
| 780 | struct xfs_mount *mp = ip->i_mount; |
| 781 | struct inode *inode = VFS_I(ip); |
Christoph Hellwig | 673e8e5 | 2011-12-18 20:00:04 +0000 | [diff] [blame] | 782 | xfs_off_t oldsize, newsize; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 783 | struct xfs_trans *tp; |
| 784 | int error; |
Christoph Hellwig | f38996f | 2012-03-27 10:34:48 -0400 | [diff] [blame] | 785 | uint lock_flags = 0; |
Dave Chinner | 5885ebd | 2015-02-23 22:37:08 +1100 | [diff] [blame] | 786 | bool did_zeroing = false; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 787 | |
Christoph Hellwig | 76ca4c2 | 2013-10-14 07:09:35 -0700 | [diff] [blame] | 788 | ASSERT(xfs_isilocked(ip, XFS_IOLOCK_EXCL)); |
Dave Chinner | e8e9ad4 | 2015-02-23 21:45:32 +1100 | [diff] [blame] | 789 | ASSERT(xfs_isilocked(ip, XFS_MMAPLOCK_EXCL)); |
Dave Chinner | c19b3b05 | 2016-02-09 16:54:58 +1100 | [diff] [blame] | 790 | ASSERT(S_ISREG(inode->i_mode)); |
Christoph Hellwig | fe60a8a | 2014-02-10 10:35:22 +1100 | [diff] [blame] | 791 | ASSERT((iattr->ia_valid & (ATTR_UID|ATTR_GID|ATTR_ATIME|ATTR_ATIME_SET| |
| 792 | ATTR_MTIME_SET|ATTR_KILL_PRIV|ATTR_TIMES_SET)) == 0); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 793 | |
Christoph Hellwig | ce7ae151 | 2011-12-18 20:00:11 +0000 | [diff] [blame] | 794 | oldsize = inode->i_size; |
Christoph Hellwig | 673e8e5 | 2011-12-18 20:00:04 +0000 | [diff] [blame] | 795 | newsize = iattr->ia_size; |
| 796 | |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 797 | /* |
| 798 | * Short circuit the truncate case for zero length files. |
| 799 | */ |
Christoph Hellwig | 673e8e5 | 2011-12-18 20:00:04 +0000 | [diff] [blame] | 800 | if (newsize == 0 && oldsize == 0 && ip->i_d.di_nextents == 0) { |
Christoph Hellwig | fe60a8a | 2014-02-10 10:35:22 +1100 | [diff] [blame] | 801 | if (!(iattr->ia_valid & (ATTR_CTIME|ATTR_MTIME))) |
Christoph Hellwig | 76ca4c2 | 2013-10-14 07:09:35 -0700 | [diff] [blame] | 802 | return 0; |
Christoph Hellwig | 681b120 | 2011-07-08 14:34:26 +0200 | [diff] [blame] | 803 | |
| 804 | /* |
| 805 | * Use the regular setattr path to update the timestamps. |
| 806 | */ |
Christoph Hellwig | 681b120 | 2011-07-08 14:34:26 +0200 | [diff] [blame] | 807 | iattr->ia_valid &= ~ATTR_SIZE; |
| 808 | return xfs_setattr_nonsize(ip, iattr, 0); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 809 | } |
| 810 | |
| 811 | /* |
| 812 | * Make sure that the dquots are attached to the inode. |
| 813 | */ |
Christoph Hellwig | f38996f | 2012-03-27 10:34:48 -0400 | [diff] [blame] | 814 | error = xfs_qm_dqattach(ip, 0); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 815 | if (error) |
Christoph Hellwig | 76ca4c2 | 2013-10-14 07:09:35 -0700 | [diff] [blame] | 816 | return error; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 817 | |
| 818 | /* |
Christoph Hellwig | f0c6bcb | 2016-06-21 09:52:47 +1000 | [diff] [blame] | 819 | * Wait for all direct I/O to complete. |
| 820 | */ |
| 821 | inode_dio_wait(inode); |
| 822 | |
| 823 | /* |
Dave Chinner | 5885ebd | 2015-02-23 22:37:08 +1100 | [diff] [blame] | 824 | * File data changes must be complete before we start the transaction to |
| 825 | * modify the inode. This needs to be done before joining the inode to |
| 826 | * the transaction because the inode cannot be unlocked once it is a |
| 827 | * part of the transaction. |
| 828 | * |
Christoph Hellwig | f0c6bcb | 2016-06-21 09:52:47 +1000 | [diff] [blame] | 829 | * Start with zeroing any data beyond EOF that we may expose on file |
| 830 | * extension, or zeroing out the rest of the block on a downward |
| 831 | * truncate. |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 832 | */ |
Christoph Hellwig | 673e8e5 | 2011-12-18 20:00:04 +0000 | [diff] [blame] | 833 | if (newsize > oldsize) { |
Dave Chinner | 5885ebd | 2015-02-23 22:37:08 +1100 | [diff] [blame] | 834 | error = xfs_zero_eof(ip, newsize, oldsize, &did_zeroing); |
Christoph Hellwig | f0c6bcb | 2016-06-21 09:52:47 +1000 | [diff] [blame] | 835 | } else { |
Christoph Hellwig | 459f0fb | 2016-06-21 09:55:18 +1000 | [diff] [blame] | 836 | error = iomap_truncate_page(inode, newsize, &did_zeroing, |
| 837 | &xfs_iomap_ops); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 838 | } |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 839 | |
Christoph Hellwig | f0c6bcb | 2016-06-21 09:52:47 +1000 | [diff] [blame] | 840 | if (error) |
| 841 | return error; |
| 842 | |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 843 | /* |
| 844 | * We are going to log the inode size change in this transaction so |
| 845 | * any previous writes that are beyond the on disk EOF and the new |
| 846 | * EOF that have not been written out need to be written here. If we |
| 847 | * 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] | 848 | * problem. Note that this includes any block zeroing we did above; |
| 849 | * otherwise those blocks may not be zeroed after a crash. |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 850 | */ |
Christoph Hellwig | 68a9f5e | 2016-06-21 09:53:44 +1000 | [diff] [blame] | 851 | if (did_zeroing || |
| 852 | (newsize > ip->i_d.di_size && oldsize != ip->i_d.di_size)) { |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 853 | error = filemap_write_and_wait_range(VFS_I(ip)->i_mapping, |
Dave Chinner | 4bc1ea6 | 2012-11-12 22:53:56 +1100 | [diff] [blame] | 854 | ip->i_d.di_size, newsize); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 855 | if (error) |
Christoph Hellwig | 76ca4c2 | 2013-10-14 07:09:35 -0700 | [diff] [blame] | 856 | return error; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 857 | } |
| 858 | |
Dave Chinner | 49abc3a | 2014-05-07 08:05:45 +1000 | [diff] [blame] | 859 | /* |
Dave Chinner | 0f9160b | 2015-02-23 21:46:58 +1100 | [diff] [blame] | 860 | * We've already locked out new page faults, so now we can safely remove |
| 861 | * pages from the page cache knowing they won't get refaulted until we |
| 862 | * drop the XFS_MMAP_EXCL lock after the extent manipulations are |
| 863 | * complete. The truncate_setsize() call also cleans partial EOF page |
| 864 | * PTEs on extending truncates and hence ensures sub-page block size |
| 865 | * filesystems are correctly handled, too. |
Dave Chinner | 49abc3a | 2014-05-07 08:05:45 +1000 | [diff] [blame] | 866 | * |
Dave Chinner | 0f9160b | 2015-02-23 21:46:58 +1100 | [diff] [blame] | 867 | * We have to do all the page cache truncate work outside the |
| 868 | * transaction context as the "lock" order is page lock->log space |
| 869 | * reservation as defined by extent allocation in the writeback path. |
Christoph Hellwig | 253f491 | 2016-04-06 09:19:55 +1000 | [diff] [blame] | 870 | * Hence a truncate can fail with ENOMEM from xfs_trans_alloc(), but |
Dave Chinner | 0f9160b | 2015-02-23 21:46:58 +1100 | [diff] [blame] | 871 | * having already truncated the in-memory version of the file (i.e. made |
| 872 | * user visible changes). There's not much we can do about this, except |
| 873 | * to hope that the caller sees ENOMEM and retries the truncate |
| 874 | * operation. |
Dave Chinner | 49abc3a | 2014-05-07 08:05:45 +1000 | [diff] [blame] | 875 | */ |
Dave Chinner | 49abc3a | 2014-05-07 08:05:45 +1000 | [diff] [blame] | 876 | truncate_setsize(inode, newsize); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 877 | |
Christoph Hellwig | 253f491 | 2016-04-06 09:19:55 +1000 | [diff] [blame] | 878 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_itruncate, 0, 0, 0, &tp); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 879 | if (error) |
Christoph Hellwig | 253f491 | 2016-04-06 09:19:55 +1000 | [diff] [blame] | 880 | return error; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 881 | |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 882 | lock_flags |= XFS_ILOCK_EXCL; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 883 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 884 | xfs_trans_ijoin(tp, ip, 0); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 885 | |
| 886 | /* |
| 887 | * Only change the c/mtime if we are changing the size or we are |
| 888 | * explicitly asked to change it. This handles the semantic difference |
| 889 | * between truncate() and ftruncate() as implemented in the VFS. |
| 890 | * |
| 891 | * The regular truncate() case without ATTR_CTIME and ATTR_MTIME is a |
| 892 | * special case where we need to update the times despite not having |
| 893 | * these flags set. For all other operations the VFS set these flags |
| 894 | * explicitly if it wants a timestamp update. |
| 895 | */ |
Christoph Hellwig | fe60a8a | 2014-02-10 10:35:22 +1100 | [diff] [blame] | 896 | if (newsize != oldsize && |
| 897 | !(iattr->ia_valid & (ATTR_CTIME | ATTR_MTIME))) { |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 898 | iattr->ia_ctime = iattr->ia_mtime = |
| 899 | current_fs_time(inode->i_sb); |
Christoph Hellwig | fe60a8a | 2014-02-10 10:35:22 +1100 | [diff] [blame] | 900 | iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 901 | } |
| 902 | |
Christoph Hellwig | 673e8e5 | 2011-12-18 20:00:04 +0000 | [diff] [blame] | 903 | /* |
| 904 | * The first thing we do is set the size to new_size permanently on |
| 905 | * disk. This way we don't have to worry about anyone ever being able |
| 906 | * to look at the data being freed even in the face of a crash. |
| 907 | * What we're getting around here is the case where we free a block, it |
| 908 | * is allocated to another file, it is written to, and then we crash. |
| 909 | * If the new data gets written to the file but the log buffers |
| 910 | * containing the free and reallocation don't, then we'd end up with |
| 911 | * garbage in the blocks being freed. As long as we make the new size |
| 912 | * permanent before actually freeing any blocks it doesn't matter if |
| 913 | * they get written to. |
| 914 | */ |
| 915 | ip->i_d.di_size = newsize; |
Christoph Hellwig | 673e8e5 | 2011-12-18 20:00:04 +0000 | [diff] [blame] | 916 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| 917 | |
| 918 | if (newsize <= oldsize) { |
| 919 | error = xfs_itruncate_extents(&tp, ip, XFS_DATA_FORK, newsize); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 920 | if (error) |
Christoph Hellwig | 4906e21 | 2015-06-04 13:47:56 +1000 | [diff] [blame] | 921 | goto out_trans_cancel; |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 922 | |
| 923 | /* |
| 924 | * Truncated "down", so we're removing references to old data |
| 925 | * here - if we delay flushing for a long time, we expose |
| 926 | * ourselves unduly to the notorious NULL files problem. So, |
| 927 | * we mark this inode and flush it when the file is closed, |
| 928 | * and do not wait the usual (long) time for writeout. |
| 929 | */ |
| 930 | xfs_iflags_set(ip, XFS_ITRUNCATED); |
Brian Foster | 27b5286 | 2012-11-06 09:50:38 -0500 | [diff] [blame] | 931 | |
| 932 | /* A truncate down always removes post-EOF blocks. */ |
| 933 | xfs_inode_clear_eofblocks_tag(ip); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 934 | } |
| 935 | |
Christoph Hellwig | fe60a8a | 2014-02-10 10:35:22 +1100 | [diff] [blame] | 936 | if (iattr->ia_valid & ATTR_MODE) |
Christoph Hellwig | 0c3d88d | 2013-11-18 05:10:40 -0800 | [diff] [blame] | 937 | xfs_setattr_mode(ip, iattr); |
Christoph Hellwig | fe60a8a | 2014-02-10 10:35:22 +1100 | [diff] [blame] | 938 | if (iattr->ia_valid & (ATTR_ATIME|ATTR_CTIME|ATTR_MTIME)) |
Christoph Hellwig | c91c46c | 2013-11-18 05:10:52 -0800 | [diff] [blame] | 939 | xfs_setattr_time(ip, iattr); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 940 | |
| 941 | xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); |
| 942 | |
Bill O'Donnell | ff6d6af | 2015-10-12 18:21:22 +1100 | [diff] [blame] | 943 | XFS_STATS_INC(mp, xs_ig_attrchg); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 944 | |
| 945 | if (mp->m_flags & XFS_MOUNT_WSYNC) |
| 946 | xfs_trans_set_sync(tp); |
| 947 | |
Christoph Hellwig | 7039331 | 2015-06-04 13:48:08 +1000 | [diff] [blame] | 948 | error = xfs_trans_commit(tp); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 949 | out_unlock: |
| 950 | if (lock_flags) |
| 951 | xfs_iunlock(ip, lock_flags); |
| 952 | return error; |
| 953 | |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 954 | out_trans_cancel: |
Christoph Hellwig | 4906e21 | 2015-06-04 13:47:56 +1000 | [diff] [blame] | 955 | xfs_trans_cancel(tp); |
Christoph Hellwig | c4ed424 | 2011-07-08 14:34:23 +0200 | [diff] [blame] | 956 | goto out_unlock; |
| 957 | } |
| 958 | |
Jan Kara | 69bca80 | 2016-05-26 14:46:43 +0200 | [diff] [blame] | 959 | int |
| 960 | xfs_vn_setattr_size( |
| 961 | struct dentry *dentry, |
| 962 | struct iattr *iattr) |
| 963 | { |
| 964 | struct xfs_inode *ip = XFS_I(d_inode(dentry)); |
| 965 | int error; |
| 966 | |
| 967 | trace_xfs_setattr(ip); |
| 968 | |
| 969 | error = xfs_vn_change_ok(dentry, iattr); |
| 970 | if (error) |
| 971 | return error; |
| 972 | return xfs_setattr_size(ip, iattr); |
| 973 | } |
| 974 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | STATIC int |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 976 | xfs_vn_setattr( |
Christoph Hellwig | 76ca4c2 | 2013-10-14 07:09:35 -0700 | [diff] [blame] | 977 | struct dentry *dentry, |
| 978 | struct iattr *iattr) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 979 | { |
Christoph Hellwig | 76ca4c2 | 2013-10-14 07:09:35 -0700 | [diff] [blame] | 980 | int error; |
| 981 | |
| 982 | if (iattr->ia_valid & ATTR_SIZE) { |
Jan Kara | 69bca80 | 2016-05-26 14:46:43 +0200 | [diff] [blame] | 983 | struct xfs_inode *ip = XFS_I(d_inode(dentry)); |
| 984 | uint iolock = XFS_IOLOCK_EXCL; |
Christoph Hellwig | 781355c | 2015-02-16 11:59:50 +1100 | [diff] [blame] | 985 | |
| 986 | xfs_ilock(ip, iolock); |
Linus Torvalds | 9ec3a64 | 2015-04-26 15:48:49 -0700 | [diff] [blame] | 987 | error = xfs_break_layouts(d_inode(dentry), &iolock, true); |
Dave Chinner | e8e9ad4 | 2015-02-23 21:45:32 +1100 | [diff] [blame] | 988 | if (!error) { |
| 989 | xfs_ilock(ip, XFS_MMAPLOCK_EXCL); |
| 990 | iolock |= XFS_MMAPLOCK_EXCL; |
| 991 | |
Jan Kara | 69bca80 | 2016-05-26 14:46:43 +0200 | [diff] [blame] | 992 | error = xfs_vn_setattr_size(dentry, iattr); |
Dave Chinner | e8e9ad4 | 2015-02-23 21:45:32 +1100 | [diff] [blame] | 993 | } |
Christoph Hellwig | 781355c | 2015-02-16 11:59:50 +1100 | [diff] [blame] | 994 | xfs_iunlock(ip, iolock); |
Christoph Hellwig | 76ca4c2 | 2013-10-14 07:09:35 -0700 | [diff] [blame] | 995 | } else { |
Jan Kara | 69bca80 | 2016-05-26 14:46:43 +0200 | [diff] [blame] | 996 | error = xfs_vn_setattr_nonsize(dentry, iattr); |
Christoph Hellwig | 76ca4c2 | 2013-10-14 07:09:35 -0700 | [diff] [blame] | 997 | } |
| 998 | |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 999 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1000 | } |
| 1001 | |
Christoph Hellwig | 69ff282 | 2012-06-06 17:01:28 -0400 | [diff] [blame] | 1002 | STATIC int |
| 1003 | xfs_vn_update_time( |
| 1004 | struct inode *inode, |
| 1005 | struct timespec *now, |
| 1006 | int flags) |
| 1007 | { |
| 1008 | struct xfs_inode *ip = XFS_I(inode); |
| 1009 | struct xfs_mount *mp = ip->i_mount; |
| 1010 | struct xfs_trans *tp; |
| 1011 | int error; |
| 1012 | |
| 1013 | trace_xfs_update_time(ip); |
| 1014 | |
Christoph Hellwig | 253f491 | 2016-04-06 09:19:55 +1000 | [diff] [blame] | 1015 | error = xfs_trans_alloc(mp, &M_RES(mp)->tr_fsyncts, 0, 0, 0, &tp); |
| 1016 | if (error) |
Dave Chinner | 2451337 | 2014-06-25 14:58:08 +1000 | [diff] [blame] | 1017 | return error; |
Christoph Hellwig | 69ff282 | 2012-06-06 17:01:28 -0400 | [diff] [blame] | 1018 | |
| 1019 | xfs_ilock(ip, XFS_ILOCK_EXCL); |
Dave Chinner | 3987848 | 2016-02-09 16:54:58 +1100 | [diff] [blame] | 1020 | if (flags & S_CTIME) |
Christoph Hellwig | 69ff282 | 2012-06-06 17:01:28 -0400 | [diff] [blame] | 1021 | inode->i_ctime = *now; |
Dave Chinner | 3987848 | 2016-02-09 16:54:58 +1100 | [diff] [blame] | 1022 | if (flags & S_MTIME) |
Christoph Hellwig | 69ff282 | 2012-06-06 17:01:28 -0400 | [diff] [blame] | 1023 | inode->i_mtime = *now; |
Dave Chinner | 3987848 | 2016-02-09 16:54:58 +1100 | [diff] [blame] | 1024 | if (flags & S_ATIME) |
Christoph Hellwig | 69ff282 | 2012-06-06 17:01:28 -0400 | [diff] [blame] | 1025 | inode->i_atime = *now; |
Dave Chinner | 3987848 | 2016-02-09 16:54:58 +1100 | [diff] [blame] | 1026 | |
Christoph Hellwig | 69ff282 | 2012-06-06 17:01:28 -0400 | [diff] [blame] | 1027 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); |
| 1028 | xfs_trans_log_inode(tp, ip, XFS_ILOG_TIMESTAMP); |
Christoph Hellwig | 7039331 | 2015-06-04 13:48:08 +1000 | [diff] [blame] | 1029 | return xfs_trans_commit(tp); |
Christoph Hellwig | 69ff282 | 2012-06-06 17:01:28 -0400 | [diff] [blame] | 1030 | } |
| 1031 | |
Eric Sandeen | f35642e | 2008-11-28 14:23:35 +1100 | [diff] [blame] | 1032 | STATIC int |
| 1033 | xfs_vn_fiemap( |
| 1034 | struct inode *inode, |
| 1035 | struct fiemap_extent_info *fieinfo, |
| 1036 | u64 start, |
| 1037 | u64 length) |
| 1038 | { |
Eric Sandeen | f35642e | 2008-11-28 14:23:35 +1100 | [diff] [blame] | 1039 | int error; |
| 1040 | |
Christoph Hellwig | d2bb140 | 2016-06-21 09:54:53 +1000 | [diff] [blame] | 1041 | xfs_ilock(XFS_I(inode), XFS_IOLOCK_SHARED); |
| 1042 | error = iomap_fiemap(inode, fieinfo, start, length, &xfs_iomap_ops); |
| 1043 | xfs_iunlock(XFS_I(inode), XFS_IOLOCK_SHARED); |
Eric Sandeen | f35642e | 2008-11-28 14:23:35 +1100 | [diff] [blame] | 1044 | |
Christoph Hellwig | d2bb140 | 2016-06-21 09:54:53 +1000 | [diff] [blame] | 1045 | return error; |
Eric Sandeen | f35642e | 2008-11-28 14:23:35 +1100 | [diff] [blame] | 1046 | } |
| 1047 | |
Zhi Yong Wu | 99b6436 | 2013-12-18 08:22:40 +0800 | [diff] [blame] | 1048 | STATIC int |
| 1049 | xfs_vn_tmpfile( |
| 1050 | struct inode *dir, |
| 1051 | struct dentry *dentry, |
| 1052 | umode_t mode) |
| 1053 | { |
Brian Foster | d540e43 | 2014-05-06 07:34:28 +1000 | [diff] [blame] | 1054 | return xfs_generic_create(dir, dentry, mode, 0, true); |
Zhi Yong Wu | 99b6436 | 2013-12-18 08:22:40 +0800 | [diff] [blame] | 1055 | } |
| 1056 | |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1057 | static const struct inode_operations xfs_inode_operations = { |
Christoph Hellwig | 4e34e71 | 2011-07-23 17:37:31 +0200 | [diff] [blame] | 1058 | .get_acl = xfs_get_acl, |
Christoph Hellwig | 2401dc2 | 2013-12-20 05:16:50 -0800 | [diff] [blame] | 1059 | .set_acl = xfs_set_acl, |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 1060 | .getattr = xfs_vn_getattr, |
| 1061 | .setattr = xfs_vn_setattr, |
Lachlan McIlroy | 0ec5851 | 2008-06-23 13:23:01 +1000 | [diff] [blame] | 1062 | .setxattr = generic_setxattr, |
| 1063 | .getxattr = generic_getxattr, |
| 1064 | .removexattr = generic_removexattr, |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 1065 | .listxattr = xfs_vn_listxattr, |
Eric Sandeen | f35642e | 2008-11-28 14:23:35 +1100 | [diff] [blame] | 1066 | .fiemap = xfs_vn_fiemap, |
Christoph Hellwig | 69ff282 | 2012-06-06 17:01:28 -0400 | [diff] [blame] | 1067 | .update_time = xfs_vn_update_time, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1068 | }; |
| 1069 | |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1070 | static const struct inode_operations xfs_dir_inode_operations = { |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 1071 | .create = xfs_vn_create, |
| 1072 | .lookup = xfs_vn_lookup, |
| 1073 | .link = xfs_vn_link, |
| 1074 | .unlink = xfs_vn_unlink, |
| 1075 | .symlink = xfs_vn_symlink, |
| 1076 | .mkdir = xfs_vn_mkdir, |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1077 | /* |
| 1078 | * Yes, XFS uses the same method for rmdir and unlink. |
| 1079 | * |
| 1080 | * There are some subtile differences deeper in the code, |
| 1081 | * but we use S_ISDIR to check for those. |
| 1082 | */ |
| 1083 | .rmdir = xfs_vn_unlink, |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 1084 | .mknod = xfs_vn_mknod, |
Carlos Maiolino | dbe1b5c | 2014-12-24 08:51:38 +1100 | [diff] [blame] | 1085 | .rename2 = xfs_vn_rename, |
Christoph Hellwig | 4e34e71 | 2011-07-23 17:37:31 +0200 | [diff] [blame] | 1086 | .get_acl = xfs_get_acl, |
Christoph Hellwig | 2401dc2 | 2013-12-20 05:16:50 -0800 | [diff] [blame] | 1087 | .set_acl = xfs_set_acl, |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 1088 | .getattr = xfs_vn_getattr, |
| 1089 | .setattr = xfs_vn_setattr, |
Lachlan McIlroy | 0ec5851 | 2008-06-23 13:23:01 +1000 | [diff] [blame] | 1090 | .setxattr = generic_setxattr, |
| 1091 | .getxattr = generic_getxattr, |
| 1092 | .removexattr = generic_removexattr, |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 1093 | .listxattr = xfs_vn_listxattr, |
Christoph Hellwig | 69ff282 | 2012-06-06 17:01:28 -0400 | [diff] [blame] | 1094 | .update_time = xfs_vn_update_time, |
Zhi Yong Wu | 99b6436 | 2013-12-18 08:22:40 +0800 | [diff] [blame] | 1095 | .tmpfile = xfs_vn_tmpfile, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1096 | }; |
| 1097 | |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1098 | static const struct inode_operations xfs_dir_ci_inode_operations = { |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 1099 | .create = xfs_vn_create, |
| 1100 | .lookup = xfs_vn_ci_lookup, |
| 1101 | .link = xfs_vn_link, |
| 1102 | .unlink = xfs_vn_unlink, |
| 1103 | .symlink = xfs_vn_symlink, |
| 1104 | .mkdir = xfs_vn_mkdir, |
Christoph Hellwig | 8f112e3 | 2008-06-23 13:25:17 +1000 | [diff] [blame] | 1105 | /* |
| 1106 | * Yes, XFS uses the same method for rmdir and unlink. |
| 1107 | * |
| 1108 | * There are some subtile differences deeper in the code, |
| 1109 | * but we use S_ISDIR to check for those. |
| 1110 | */ |
| 1111 | .rmdir = xfs_vn_unlink, |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 1112 | .mknod = xfs_vn_mknod, |
Carlos Maiolino | dbe1b5c | 2014-12-24 08:51:38 +1100 | [diff] [blame] | 1113 | .rename2 = xfs_vn_rename, |
Christoph Hellwig | 4e34e71 | 2011-07-23 17:37:31 +0200 | [diff] [blame] | 1114 | .get_acl = xfs_get_acl, |
Christoph Hellwig | 2401dc2 | 2013-12-20 05:16:50 -0800 | [diff] [blame] | 1115 | .set_acl = xfs_set_acl, |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 1116 | .getattr = xfs_vn_getattr, |
| 1117 | .setattr = xfs_vn_setattr, |
Lachlan McIlroy | 0ec5851 | 2008-06-23 13:23:01 +1000 | [diff] [blame] | 1118 | .setxattr = generic_setxattr, |
| 1119 | .getxattr = generic_getxattr, |
| 1120 | .removexattr = generic_removexattr, |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 1121 | .listxattr = xfs_vn_listxattr, |
Christoph Hellwig | 69ff282 | 2012-06-06 17:01:28 -0400 | [diff] [blame] | 1122 | .update_time = xfs_vn_update_time, |
Zhi Yong Wu | 99b6436 | 2013-12-18 08:22:40 +0800 | [diff] [blame] | 1123 | .tmpfile = xfs_vn_tmpfile, |
Barry Naujok | 384f3ce | 2008-05-21 16:58:22 +1000 | [diff] [blame] | 1124 | }; |
| 1125 | |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1126 | static const struct inode_operations xfs_symlink_inode_operations = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1127 | .readlink = generic_readlink, |
Al Viro | 6b25539 | 2015-11-17 10:20:54 -0500 | [diff] [blame] | 1128 | .get_link = xfs_vn_get_link, |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 1129 | .getattr = xfs_vn_getattr, |
| 1130 | .setattr = xfs_vn_setattr, |
Lachlan McIlroy | 0ec5851 | 2008-06-23 13:23:01 +1000 | [diff] [blame] | 1131 | .setxattr = generic_setxattr, |
| 1132 | .getxattr = generic_getxattr, |
| 1133 | .removexattr = generic_removexattr, |
Nathan Scott | 416c6d5 | 2006-03-14 14:00:51 +1100 | [diff] [blame] | 1134 | .listxattr = xfs_vn_listxattr, |
Christoph Hellwig | 69ff282 | 2012-06-06 17:01:28 -0400 | [diff] [blame] | 1135 | .update_time = xfs_vn_update_time, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1136 | }; |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1137 | |
Christoph Hellwig | 30ee052 | 2016-04-06 07:53:29 +1000 | [diff] [blame] | 1138 | static const struct inode_operations xfs_inline_symlink_inode_operations = { |
| 1139 | .readlink = generic_readlink, |
| 1140 | .get_link = xfs_vn_get_link_inline, |
| 1141 | .getattr = xfs_vn_getattr, |
| 1142 | .setattr = xfs_vn_setattr, |
| 1143 | .setxattr = generic_setxattr, |
| 1144 | .getxattr = generic_getxattr, |
| 1145 | .removexattr = generic_removexattr, |
| 1146 | .listxattr = xfs_vn_listxattr, |
| 1147 | .update_time = xfs_vn_update_time, |
| 1148 | }; |
| 1149 | |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1150 | STATIC void |
| 1151 | xfs_diflags_to_iflags( |
| 1152 | struct inode *inode, |
| 1153 | struct xfs_inode *ip) |
| 1154 | { |
Dave Chinner | cbe4dab | 2015-06-04 09:19:18 +1000 | [diff] [blame] | 1155 | uint16_t flags = ip->i_d.di_flags; |
| 1156 | |
| 1157 | inode->i_flags &= ~(S_IMMUTABLE | S_APPEND | S_SYNC | |
| 1158 | S_NOATIME | S_DAX); |
| 1159 | |
| 1160 | if (flags & XFS_DIFLAG_IMMUTABLE) |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1161 | inode->i_flags |= S_IMMUTABLE; |
Dave Chinner | cbe4dab | 2015-06-04 09:19:18 +1000 | [diff] [blame] | 1162 | if (flags & XFS_DIFLAG_APPEND) |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1163 | inode->i_flags |= S_APPEND; |
Dave Chinner | cbe4dab | 2015-06-04 09:19:18 +1000 | [diff] [blame] | 1164 | if (flags & XFS_DIFLAG_SYNC) |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1165 | inode->i_flags |= S_SYNC; |
Dave Chinner | cbe4dab | 2015-06-04 09:19:18 +1000 | [diff] [blame] | 1166 | if (flags & XFS_DIFLAG_NOATIME) |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1167 | inode->i_flags |= S_NOATIME; |
Dave Chinner | db10c69 | 2016-03-01 09:41:33 +1100 | [diff] [blame] | 1168 | if (S_ISREG(inode->i_mode) && |
Dave Chinner | 6448543 | 2016-03-01 09:41:33 +1100 | [diff] [blame] | 1169 | ip->i_mount->m_sb.sb_blocksize == PAGE_SIZE && |
Dave Chinner | db10c69 | 2016-03-01 09:41:33 +1100 | [diff] [blame] | 1170 | (ip->i_mount->m_flags & XFS_MOUNT_DAX || |
| 1171 | ip->i_d.di_flags2 & XFS_DIFLAG2_DAX)) |
Dave Chinner | cbe4dab | 2015-06-04 09:19:18 +1000 | [diff] [blame] | 1172 | inode->i_flags |= S_DAX; |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1173 | } |
| 1174 | |
| 1175 | /* |
Christoph Hellwig | 2b3d1d4 | 2016-04-06 07:48:27 +1000 | [diff] [blame] | 1176 | * Initialize the Linux inode. |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1177 | * |
Dave Chinner | 58c9047 | 2015-02-23 22:38:08 +1100 | [diff] [blame] | 1178 | * When reading existing inodes from disk this is called directly from xfs_iget, |
| 1179 | * when creating a new inode it is called from xfs_ialloc after setting up the |
| 1180 | * inode. These callers have different criteria for clearing XFS_INEW, so leave |
| 1181 | * it up to the caller to deal with unlocking the inode appropriately. |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1182 | */ |
| 1183 | void |
| 1184 | xfs_setup_inode( |
| 1185 | struct xfs_inode *ip) |
| 1186 | { |
David Chinner | bf90424 | 2008-10-30 17:36:14 +1100 | [diff] [blame] | 1187 | struct inode *inode = &ip->i_vnode; |
Dave Chinner | ad22c7a | 2013-10-29 22:11:57 +1100 | [diff] [blame] | 1188 | gfp_t gfp_mask; |
David Chinner | bf90424 | 2008-10-30 17:36:14 +1100 | [diff] [blame] | 1189 | |
| 1190 | inode->i_ino = ip->i_ino; |
Christoph Hellwig | eaff807 | 2009-12-17 14:25:01 +0100 | [diff] [blame] | 1191 | inode->i_state = I_NEW; |
Christoph Hellwig | 646ec46 | 2010-10-23 07:15:32 -0400 | [diff] [blame] | 1192 | |
| 1193 | inode_sb_list_add(inode); |
Christoph Hellwig | c6f6cd0 | 2010-11-06 11:43:08 +0000 | [diff] [blame] | 1194 | /* make the inode look hashed for the writeback code */ |
| 1195 | hlist_add_fake(&inode->i_hash); |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1196 | |
Dwight Engen | 7aab1b2 | 2013-08-15 14:08:01 -0400 | [diff] [blame] | 1197 | inode->i_uid = xfs_uid_to_kuid(ip->i_d.di_uid); |
| 1198 | inode->i_gid = xfs_gid_to_kgid(ip->i_d.di_gid); |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1199 | |
| 1200 | switch (inode->i_mode & S_IFMT) { |
| 1201 | case S_IFBLK: |
| 1202 | case S_IFCHR: |
| 1203 | inode->i_rdev = |
| 1204 | MKDEV(sysv_major(ip->i_df.if_u2.if_rdev) & 0x1ff, |
| 1205 | sysv_minor(ip->i_df.if_u2.if_rdev)); |
| 1206 | break; |
| 1207 | default: |
| 1208 | inode->i_rdev = 0; |
| 1209 | break; |
| 1210 | } |
| 1211 | |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1212 | i_size_write(inode, ip->i_d.di_size); |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1213 | xfs_diflags_to_iflags(inode, ip); |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1214 | |
Christoph Hellwig | 2b3d1d4 | 2016-04-06 07:48:27 +1000 | [diff] [blame] | 1215 | if (S_ISDIR(inode->i_mode)) { |
Dave Chinner | 93a8614 | 2014-02-27 16:51:39 +1100 | [diff] [blame] | 1216 | lockdep_set_class(&ip->i_lock.mr_lock, &xfs_dir_ilock_class); |
Dave Chinner | 32c5483 | 2013-10-29 22:11:46 +1100 | [diff] [blame] | 1217 | ip->d_ops = ip->i_mount->m_dir_inode_ops; |
Christoph Hellwig | 2b3d1d4 | 2016-04-06 07:48:27 +1000 | [diff] [blame] | 1218 | } else { |
| 1219 | ip->d_ops = ip->i_mount->m_nondir_inode_ops; |
| 1220 | lockdep_set_class(&ip->i_lock.mr_lock, &xfs_nondir_ilock_class); |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1221 | } |
| 1222 | |
Christoph Hellwig | 510792e | 2011-07-26 15:07:29 +0000 | [diff] [blame] | 1223 | /* |
Dave Chinner | ad22c7a | 2013-10-29 22:11:57 +1100 | [diff] [blame] | 1224 | * Ensure all page cache allocations are done from GFP_NOFS context to |
| 1225 | * prevent direct reclaim recursion back into the filesystem and blowing |
| 1226 | * stacks or deadlocking. |
| 1227 | */ |
| 1228 | gfp_mask = mapping_gfp_mask(inode->i_mapping); |
| 1229 | mapping_set_gfp_mask(inode->i_mapping, (gfp_mask & ~(__GFP_FS))); |
| 1230 | |
| 1231 | /* |
Christoph Hellwig | 510792e | 2011-07-26 15:07:29 +0000 | [diff] [blame] | 1232 | * If there is no attribute fork no ACL can exist on this inode, |
| 1233 | * and it can't have any file capabilities attached to it either. |
| 1234 | */ |
| 1235 | if (!XFS_IFORK_Q(ip)) { |
| 1236 | inode_has_no_xattr(inode); |
Christoph Hellwig | 6311b10 | 2011-07-23 17:36:50 +0200 | [diff] [blame] | 1237 | cache_no_acl(inode); |
Christoph Hellwig | 510792e | 2011-07-26 15:07:29 +0000 | [diff] [blame] | 1238 | } |
Christoph Hellwig | 41be8be | 2008-08-13 16:23:13 +1000 | [diff] [blame] | 1239 | } |
Christoph Hellwig | 2b3d1d4 | 2016-04-06 07:48:27 +1000 | [diff] [blame] | 1240 | |
| 1241 | void |
| 1242 | xfs_setup_iops( |
| 1243 | struct xfs_inode *ip) |
| 1244 | { |
| 1245 | struct inode *inode = &ip->i_vnode; |
| 1246 | |
| 1247 | switch (inode->i_mode & S_IFMT) { |
| 1248 | case S_IFREG: |
| 1249 | inode->i_op = &xfs_inode_operations; |
| 1250 | inode->i_fop = &xfs_file_operations; |
| 1251 | inode->i_mapping->a_ops = &xfs_address_space_operations; |
| 1252 | break; |
| 1253 | case S_IFDIR: |
| 1254 | if (xfs_sb_version_hasasciici(&XFS_M(inode->i_sb)->m_sb)) |
| 1255 | inode->i_op = &xfs_dir_ci_inode_operations; |
| 1256 | else |
| 1257 | inode->i_op = &xfs_dir_inode_operations; |
| 1258 | inode->i_fop = &xfs_dir_file_operations; |
| 1259 | break; |
| 1260 | case S_IFLNK: |
Christoph Hellwig | 30ee052 | 2016-04-06 07:53:29 +1000 | [diff] [blame] | 1261 | if (ip->i_df.if_flags & XFS_IFINLINE) |
| 1262 | inode->i_op = &xfs_inline_symlink_inode_operations; |
| 1263 | else |
| 1264 | inode->i_op = &xfs_symlink_inode_operations; |
Christoph Hellwig | 2b3d1d4 | 2016-04-06 07:48:27 +1000 | [diff] [blame] | 1265 | break; |
| 1266 | default: |
| 1267 | inode->i_op = &xfs_inode_operations; |
| 1268 | init_special_inode(inode, inode->i_mode, inode->i_rdev); |
| 1269 | break; |
| 1270 | } |
| 1271 | } |