Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
Olaf Weber | 3e57ecf | 2006-06-09 14:48:12 +1000 | [diff] [blame] | 2 | * Copyright (c) 2000-2006 Silicon Graphics, Inc. |
Nathan Scott | 7b71876 | 2005-11-02 14:58:39 +1100 | [diff] [blame] | 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" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 19 | #include "xfs_fs.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 20 | #include "xfs_types.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 21 | #include "xfs_bit.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include "xfs_log.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 23 | #include "xfs_inum.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include "xfs_trans.h" |
| 25 | #include "xfs_sb.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 26 | #include "xfs_ag.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | #include "xfs_mount.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 28 | #include "xfs_bmap_btree.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 29 | #include "xfs_dinode.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include "xfs_inode.h" |
Nathan Scott | a844f45 | 2005-11-02 14:38:42 +1100 | [diff] [blame] | 31 | #include "xfs_inode_item.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 32 | #include "xfs_bmap.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include "xfs_itable.h" |
| 34 | #include "xfs_dfrag.h" |
| 35 | #include "xfs_error.h" |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 36 | #include "xfs_vnodeops.h" |
Christoph Hellwig | 0b1b213 | 2009-12-14 23:14:59 +0000 | [diff] [blame] | 37 | #include "xfs_trace.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | |
Dave Chinner | 6bded0f | 2010-01-14 01:33:56 +0000 | [diff] [blame] | 39 | |
| 40 | static int xfs_swap_extents( |
| 41 | xfs_inode_t *ip, /* target inode */ |
| 42 | xfs_inode_t *tip, /* tmp inode */ |
| 43 | xfs_swapext_t *sxp); |
| 44 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | /* |
Dave Chinner | 6bded0f | 2010-01-14 01:33:56 +0000 | [diff] [blame] | 46 | * ioctl interface for swapext |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | */ |
| 48 | int |
| 49 | xfs_swapext( |
sandeen@sandeen.net | 743bb465 | 2008-11-25 21:20:06 -0600 | [diff] [blame] | 50 | xfs_swapext_t *sxp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | { |
Christoph Hellwig | 35fec8d | 2008-02-05 12:13:07 +1100 | [diff] [blame] | 52 | xfs_inode_t *ip, *tip; |
Dave Chinner | 6bded0f | 2010-01-14 01:33:56 +0000 | [diff] [blame] | 53 | struct file *file, *tmp_file; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 54 | int error = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 55 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | /* Pull information for the target fd */ |
Christoph Hellwig | 35fec8d | 2008-02-05 12:13:07 +1100 | [diff] [blame] | 57 | file = fget((int)sxp->sx_fdtarget); |
| 58 | if (!file) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 59 | error = XFS_ERROR(EINVAL); |
Eric Sandeen | ac12b4e | 2009-01-25 20:53:00 -0600 | [diff] [blame] | 60 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | } |
| 62 | |
Dan Rosenberg | 1817176 | 2010-06-24 12:07:47 +1000 | [diff] [blame] | 63 | if (!(file->f_mode & FMODE_WRITE) || |
| 64 | !(file->f_mode & FMODE_READ) || |
| 65 | (file->f_flags & O_APPEND)) { |
Christoph Hellwig | f6aa7f2 | 2008-02-05 12:13:15 +1100 | [diff] [blame] | 66 | error = XFS_ERROR(EBADF); |
| 67 | goto out_put_file; |
| 68 | } |
| 69 | |
Dave Chinner | 6bded0f | 2010-01-14 01:33:56 +0000 | [diff] [blame] | 70 | tmp_file = fget((int)sxp->sx_fdtmp); |
| 71 | if (!tmp_file) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | error = XFS_ERROR(EINVAL); |
Christoph Hellwig | 35fec8d | 2008-02-05 12:13:07 +1100 | [diff] [blame] | 73 | goto out_put_file; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 74 | } |
| 75 | |
Dave Chinner | 6bded0f | 2010-01-14 01:33:56 +0000 | [diff] [blame] | 76 | if (!(tmp_file->f_mode & FMODE_WRITE) || |
Dan Rosenberg | 1817176 | 2010-06-24 12:07:47 +1000 | [diff] [blame] | 77 | !(tmp_file->f_mode & FMODE_READ) || |
Dave Chinner | 6bded0f | 2010-01-14 01:33:56 +0000 | [diff] [blame] | 78 | (tmp_file->f_flags & O_APPEND)) { |
Christoph Hellwig | f6aa7f2 | 2008-02-05 12:13:15 +1100 | [diff] [blame] | 79 | error = XFS_ERROR(EBADF); |
Dave Chinner | 6bded0f | 2010-01-14 01:33:56 +0000 | [diff] [blame] | 80 | goto out_put_tmp_file; |
Christoph Hellwig | f6aa7f2 | 2008-02-05 12:13:15 +1100 | [diff] [blame] | 81 | } |
| 82 | |
Christoph Hellwig | 7c8f7af | 2009-02-12 19:56:00 +0100 | [diff] [blame] | 83 | if (IS_SWAPFILE(file->f_path.dentry->d_inode) || |
Dave Chinner | 6bded0f | 2010-01-14 01:33:56 +0000 | [diff] [blame] | 84 | IS_SWAPFILE(tmp_file->f_path.dentry->d_inode)) { |
Christoph Hellwig | 7c8f7af | 2009-02-12 19:56:00 +0100 | [diff] [blame] | 85 | error = XFS_ERROR(EINVAL); |
Dave Chinner | 6bded0f | 2010-01-14 01:33:56 +0000 | [diff] [blame] | 86 | goto out_put_tmp_file; |
Christoph Hellwig | 7c8f7af | 2009-02-12 19:56:00 +0100 | [diff] [blame] | 87 | } |
| 88 | |
Christoph Hellwig | 35fec8d | 2008-02-05 12:13:07 +1100 | [diff] [blame] | 89 | ip = XFS_I(file->f_path.dentry->d_inode); |
Dave Chinner | 6bded0f | 2010-01-14 01:33:56 +0000 | [diff] [blame] | 90 | tip = XFS_I(tmp_file->f_path.dentry->d_inode); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | |
| 92 | if (ip->i_mount != tip->i_mount) { |
Christoph Hellwig | 35fec8d | 2008-02-05 12:13:07 +1100 | [diff] [blame] | 93 | error = XFS_ERROR(EINVAL); |
Dave Chinner | 6bded0f | 2010-01-14 01:33:56 +0000 | [diff] [blame] | 94 | goto out_put_tmp_file; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | } |
| 96 | |
| 97 | if (ip->i_ino == tip->i_ino) { |
Christoph Hellwig | 35fec8d | 2008-02-05 12:13:07 +1100 | [diff] [blame] | 98 | error = XFS_ERROR(EINVAL); |
Dave Chinner | 6bded0f | 2010-01-14 01:33:56 +0000 | [diff] [blame] | 99 | goto out_put_tmp_file; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | } |
| 101 | |
Christoph Hellwig | 35fec8d | 2008-02-05 12:13:07 +1100 | [diff] [blame] | 102 | if (XFS_FORCED_SHUTDOWN(ip->i_mount)) { |
| 103 | error = XFS_ERROR(EIO); |
Dave Chinner | 6bded0f | 2010-01-14 01:33:56 +0000 | [diff] [blame] | 104 | goto out_put_tmp_file; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | } |
| 106 | |
Lachlan McIlroy | 541d7d3 | 2007-10-11 17:34:33 +1000 | [diff] [blame] | 107 | error = xfs_swap_extents(ip, tip, sxp); |
Olaf Weber | 3e57ecf | 2006-06-09 14:48:12 +1000 | [diff] [blame] | 108 | |
Dave Chinner | 6bded0f | 2010-01-14 01:33:56 +0000 | [diff] [blame] | 109 | out_put_tmp_file: |
| 110 | fput(tmp_file); |
Christoph Hellwig | 35fec8d | 2008-02-05 12:13:07 +1100 | [diff] [blame] | 111 | out_put_file: |
| 112 | fput(file); |
Christoph Hellwig | 35fec8d | 2008-02-05 12:13:07 +1100 | [diff] [blame] | 113 | out: |
Olaf Weber | 3e57ecf | 2006-06-09 14:48:12 +1000 | [diff] [blame] | 114 | return error; |
| 115 | } |
| 116 | |
Dave Chinner | e09f986 | 2010-01-14 01:33:54 +0000 | [diff] [blame] | 117 | /* |
| 118 | * We need to check that the format of the data fork in the temporary inode is |
| 119 | * valid for the target inode before doing the swap. This is not a problem with |
| 120 | * attr1 because of the fixed fork offset, but attr2 has a dynamically sized |
| 121 | * data fork depending on the space the attribute fork is taking so we can get |
| 122 | * invalid formats on the target inode. |
| 123 | * |
| 124 | * E.g. target has space for 7 extents in extent format, temp inode only has |
| 125 | * space for 6. If we defragment down to 7 extents, then the tmp format is a |
| 126 | * btree, but when swapped it needs to be in extent format. Hence we can't just |
| 127 | * blindly swap data forks on attr2 filesystems. |
| 128 | * |
| 129 | * Note that we check the swap in both directions so that we don't end up with |
| 130 | * a corrupt temporary inode, either. |
| 131 | * |
| 132 | * Note that fixing the way xfs_fsr sets up the attribute fork in the source |
| 133 | * inode will prevent this situation from occurring, so all we do here is |
| 134 | * reject and log the attempt. basically we are putting the responsibility on |
| 135 | * userspace to get this right. |
| 136 | */ |
| 137 | static int |
| 138 | xfs_swap_extents_check_format( |
| 139 | xfs_inode_t *ip, /* target inode */ |
| 140 | xfs_inode_t *tip) /* tmp inode */ |
| 141 | { |
| 142 | |
| 143 | /* Should never get a local format */ |
| 144 | if (ip->i_d.di_format == XFS_DINODE_FMT_LOCAL || |
| 145 | tip->i_d.di_format == XFS_DINODE_FMT_LOCAL) |
| 146 | return EINVAL; |
| 147 | |
| 148 | /* |
| 149 | * if the target inode has less extents that then temporary inode then |
| 150 | * why did userspace call us? |
| 151 | */ |
| 152 | if (ip->i_d.di_nextents < tip->i_d.di_nextents) |
| 153 | return EINVAL; |
| 154 | |
| 155 | /* |
| 156 | * if the target inode is in extent form and the temp inode is in btree |
| 157 | * form then we will end up with the target inode in the wrong format |
| 158 | * as we already know there are less extents in the temp inode. |
| 159 | */ |
| 160 | if (ip->i_d.di_format == XFS_DINODE_FMT_EXTENTS && |
| 161 | tip->i_d.di_format == XFS_DINODE_FMT_BTREE) |
| 162 | return EINVAL; |
| 163 | |
| 164 | /* Check temp in extent form to max in target */ |
| 165 | if (tip->i_d.di_format == XFS_DINODE_FMT_EXTENTS && |
Christoph Hellwig | 8096b1e | 2011-12-18 20:00:07 +0000 | [diff] [blame] | 166 | XFS_IFORK_NEXTENTS(tip, XFS_DATA_FORK) > |
| 167 | XFS_IFORK_MAXEXT(ip, XFS_DATA_FORK)) |
Dave Chinner | e09f986 | 2010-01-14 01:33:54 +0000 | [diff] [blame] | 168 | return EINVAL; |
| 169 | |
| 170 | /* Check target in extent form to max in temp */ |
| 171 | if (ip->i_d.di_format == XFS_DINODE_FMT_EXTENTS && |
Christoph Hellwig | 8096b1e | 2011-12-18 20:00:07 +0000 | [diff] [blame] | 172 | XFS_IFORK_NEXTENTS(ip, XFS_DATA_FORK) > |
| 173 | XFS_IFORK_MAXEXT(tip, XFS_DATA_FORK)) |
Dave Chinner | e09f986 | 2010-01-14 01:33:54 +0000 | [diff] [blame] | 174 | return EINVAL; |
| 175 | |
Dave Chinner | dd77ef9 | 2010-04-20 17:00:37 +1000 | [diff] [blame] | 176 | /* |
| 177 | * If we are in a btree format, check that the temp root block will fit |
| 178 | * in the target and that it has enough extents to be in btree format |
| 179 | * in the target. |
| 180 | * |
| 181 | * Note that we have to be careful to allow btree->extent conversions |
| 182 | * (a common defrag case) which will occur when the temp inode is in |
| 183 | * extent format... |
| 184 | */ |
Christoph Hellwig | 8096b1e | 2011-12-18 20:00:07 +0000 | [diff] [blame] | 185 | if (tip->i_d.di_format == XFS_DINODE_FMT_BTREE) { |
| 186 | if (XFS_IFORK_BOFF(ip) && |
| 187 | tip->i_df.if_broot_bytes > XFS_IFORK_BOFF(ip)) |
| 188 | return EINVAL; |
| 189 | if (XFS_IFORK_NEXTENTS(tip, XFS_DATA_FORK) <= |
| 190 | XFS_IFORK_MAXEXT(ip, XFS_DATA_FORK)) |
| 191 | return EINVAL; |
| 192 | } |
Dave Chinner | e09f986 | 2010-01-14 01:33:54 +0000 | [diff] [blame] | 193 | |
Dave Chinner | dd77ef9 | 2010-04-20 17:00:37 +1000 | [diff] [blame] | 194 | /* Reciprocal target->temp btree format checks */ |
Christoph Hellwig | 8096b1e | 2011-12-18 20:00:07 +0000 | [diff] [blame] | 195 | if (ip->i_d.di_format == XFS_DINODE_FMT_BTREE) { |
| 196 | if (XFS_IFORK_BOFF(tip) && |
| 197 | ip->i_df.if_broot_bytes > XFS_IFORK_BOFF(tip)) |
| 198 | return EINVAL; |
| 199 | |
| 200 | if (XFS_IFORK_NEXTENTS(ip, XFS_DATA_FORK) <= |
| 201 | XFS_IFORK_MAXEXT(tip, XFS_DATA_FORK)) |
| 202 | return EINVAL; |
| 203 | } |
Dave Chinner | e09f986 | 2010-01-14 01:33:54 +0000 | [diff] [blame] | 204 | |
| 205 | return 0; |
| 206 | } |
| 207 | |
Dave Chinner | 6bded0f | 2010-01-14 01:33:56 +0000 | [diff] [blame] | 208 | static int |
Olaf Weber | 3e57ecf | 2006-06-09 14:48:12 +1000 | [diff] [blame] | 209 | xfs_swap_extents( |
Dave Chinner | e09f986 | 2010-01-14 01:33:54 +0000 | [diff] [blame] | 210 | xfs_inode_t *ip, /* target inode */ |
| 211 | xfs_inode_t *tip, /* tmp inode */ |
Olaf Weber | 3e57ecf | 2006-06-09 14:48:12 +1000 | [diff] [blame] | 212 | xfs_swapext_t *sxp) |
| 213 | { |
David Sterba | 45c51b9 | 2011-04-13 22:03:28 +0000 | [diff] [blame] | 214 | xfs_mount_t *mp = ip->i_mount; |
Olaf Weber | 3e57ecf | 2006-06-09 14:48:12 +1000 | [diff] [blame] | 215 | xfs_trans_t *tp; |
| 216 | xfs_bstat_t *sbp = &sxp->sx_stat; |
Olaf Weber | 3e57ecf | 2006-06-09 14:48:12 +1000 | [diff] [blame] | 217 | xfs_ifork_t *tempifp, *ifp, *tifp; |
Christoph Hellwig | f5d8d5c | 2012-02-29 09:53:54 +0000 | [diff] [blame^] | 218 | int src_log_flags, target_log_flags; |
Olaf Weber | 3e57ecf | 2006-06-09 14:48:12 +1000 | [diff] [blame] | 219 | int error = 0; |
| 220 | int aforkblks = 0; |
| 221 | int taforkblks = 0; |
| 222 | __uint64_t tmp; |
Olaf Weber | 3e57ecf | 2006-06-09 14:48:12 +1000 | [diff] [blame] | 223 | |
Olaf Weber | 3e57ecf | 2006-06-09 14:48:12 +1000 | [diff] [blame] | 224 | tempifp = kmem_alloc(sizeof(xfs_ifork_t), KM_MAYFAIL); |
| 225 | if (!tempifp) { |
| 226 | error = XFS_ERROR(ENOMEM); |
Josef 'Jeff' Sipek | ef8f7fc | 2009-02-04 09:37:43 +0100 | [diff] [blame] | 227 | goto out; |
Olaf Weber | 3e57ecf | 2006-06-09 14:48:12 +1000 | [diff] [blame] | 228 | } |
| 229 | |
David Chinner | f9114eb | 2008-09-17 16:51:21 +1000 | [diff] [blame] | 230 | /* |
| 231 | * we have to do two separate lock calls here to keep lockdep |
| 232 | * happy. If we try to get all the locks in one call, lock will |
| 233 | * report false positives when we drop the ILOCK and regain them |
| 234 | * below. |
| 235 | */ |
| 236 | xfs_lock_two_inodes(ip, tip, XFS_IOLOCK_EXCL); |
| 237 | xfs_lock_two_inodes(ip, tip, XFS_ILOCK_EXCL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 239 | /* Verify that both files have the same format */ |
| 240 | if ((ip->i_d.di_mode & S_IFMT) != (tip->i_d.di_mode & S_IFMT)) { |
| 241 | error = XFS_ERROR(EINVAL); |
Josef 'Jeff' Sipek | ef8f7fc | 2009-02-04 09:37:43 +0100 | [diff] [blame] | 242 | goto out_unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | } |
| 244 | |
| 245 | /* Verify both files are either real-time or non-realtime */ |
Eric Sandeen | 71ddabb | 2007-11-23 16:29:42 +1100 | [diff] [blame] | 246 | if (XFS_IS_REALTIME_INODE(ip) != XFS_IS_REALTIME_INODE(tip)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | error = XFS_ERROR(EINVAL); |
Josef 'Jeff' Sipek | ef8f7fc | 2009-02-04 09:37:43 +0100 | [diff] [blame] | 248 | goto out_unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | } |
| 250 | |
Christoph Hellwig | df80c93 | 2008-08-13 16:22:09 +1000 | [diff] [blame] | 251 | if (VN_CACHED(VFS_I(tip)) != 0) { |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 252 | error = xfs_flushinval_pages(tip, 0, -1, |
| 253 | FI_REMAPF_LOCKED); |
Lachlan McIlroy | d3cf209 | 2007-05-08 13:49:27 +1000 | [diff] [blame] | 254 | if (error) |
Josef 'Jeff' Sipek | ef8f7fc | 2009-02-04 09:37:43 +0100 | [diff] [blame] | 255 | goto out_unlock; |
Christoph Hellwig | bd5a876 | 2005-06-21 15:47:39 +1000 | [diff] [blame] | 256 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | |
| 258 | /* Verify O_DIRECT for ftmp */ |
Christoph Hellwig | df80c93 | 2008-08-13 16:22:09 +1000 | [diff] [blame] | 259 | if (VN_CACHED(VFS_I(tip)) != 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 260 | error = XFS_ERROR(EINVAL); |
Josef 'Jeff' Sipek | ef8f7fc | 2009-02-04 09:37:43 +0100 | [diff] [blame] | 261 | goto out_unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | } |
| 263 | |
| 264 | /* Verify all data are being swapped */ |
Eric Sandeen | d0cfb37 | 2005-11-02 10:29:04 +1100 | [diff] [blame] | 265 | if (sxp->sx_offset != 0 || |
| 266 | sxp->sx_length != ip->i_d.di_size || |
| 267 | sxp->sx_length != tip->i_d.di_size) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 268 | error = XFS_ERROR(EFAULT); |
Josef 'Jeff' Sipek | ef8f7fc | 2009-02-04 09:37:43 +0100 | [diff] [blame] | 269 | goto out_unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | } |
| 271 | |
Dave Chinner | 3a85cd9 | 2010-01-14 01:33:55 +0000 | [diff] [blame] | 272 | trace_xfs_swap_extent_before(ip, 0); |
| 273 | trace_xfs_swap_extent_before(tip, 1); |
| 274 | |
Dave Chinner | e09f986 | 2010-01-14 01:33:54 +0000 | [diff] [blame] | 275 | /* check inode formats now that data is flushed */ |
| 276 | error = xfs_swap_extents_check_format(ip, tip); |
| 277 | if (error) { |
Dave Chinner | 5348778 | 2011-03-07 10:05:35 +1100 | [diff] [blame] | 278 | xfs_notice(mp, |
Dave Chinner | e09f986 | 2010-01-14 01:33:54 +0000 | [diff] [blame] | 279 | "%s: inode 0x%llx format is incompatible for exchanging.", |
Dave Chinner | 5348778 | 2011-03-07 10:05:35 +1100 | [diff] [blame] | 280 | __func__, ip->i_ino); |
Josef 'Jeff' Sipek | ef8f7fc | 2009-02-04 09:37:43 +0100 | [diff] [blame] | 281 | goto out_unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | } |
| 283 | |
| 284 | /* |
| 285 | * Compare the current change & modify times with that |
| 286 | * passed in. If they differ, we abort this swap. |
| 287 | * This is the mechanism used to ensure the calling |
| 288 | * process that the file was not changed out from |
| 289 | * under it. |
| 290 | */ |
Christoph Hellwig | f9581b1 | 2009-10-06 20:29:26 +0000 | [diff] [blame] | 291 | if ((sbp->bs_ctime.tv_sec != VFS_I(ip)->i_ctime.tv_sec) || |
| 292 | (sbp->bs_ctime.tv_nsec != VFS_I(ip)->i_ctime.tv_nsec) || |
| 293 | (sbp->bs_mtime.tv_sec != VFS_I(ip)->i_mtime.tv_sec) || |
| 294 | (sbp->bs_mtime.tv_nsec != VFS_I(ip)->i_mtime.tv_nsec)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 295 | error = XFS_ERROR(EBUSY); |
Josef 'Jeff' Sipek | ef8f7fc | 2009-02-04 09:37:43 +0100 | [diff] [blame] | 296 | goto out_unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | } |
| 298 | |
| 299 | /* We need to fail if the file is memory mapped. Once we have tossed |
| 300 | * all existing pages, the page fault will have no option |
| 301 | * but to go to the filesystem for pages. By making the page fault call |
Nathan Scott | 67fcaa7 | 2006-06-09 17:00:52 +1000 | [diff] [blame] | 302 | * vop_read (or write in the case of autogrow) they block on the iolock |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 303 | * until we have switched the extents. |
| 304 | */ |
Christoph Hellwig | df80c93 | 2008-08-13 16:22:09 +1000 | [diff] [blame] | 305 | if (VN_MAPPED(VFS_I(ip))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 306 | error = XFS_ERROR(EBUSY); |
Josef 'Jeff' Sipek | ef8f7fc | 2009-02-04 09:37:43 +0100 | [diff] [blame] | 307 | goto out_unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 308 | } |
| 309 | |
| 310 | xfs_iunlock(ip, XFS_ILOCK_EXCL); |
| 311 | xfs_iunlock(tip, XFS_ILOCK_EXCL); |
| 312 | |
| 313 | /* |
| 314 | * There is a race condition here since we gave up the |
| 315 | * ilock. However, the data fork will not change since |
| 316 | * we have the iolock (locked for truncation too) so we |
| 317 | * are safe. We don't really care if non-io related |
| 318 | * fields change. |
| 319 | */ |
| 320 | |
Christoph Hellwig | 739bfb2 | 2007-08-29 10:58:01 +1000 | [diff] [blame] | 321 | xfs_tosspages(ip, 0, -1, FI_REMAPF); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | |
| 323 | tp = xfs_trans_alloc(mp, XFS_TRANS_SWAPEXT); |
| 324 | if ((error = xfs_trans_reserve(tp, 0, |
| 325 | XFS_ICHANGE_LOG_RES(mp), 0, |
| 326 | 0, 0))) { |
| 327 | xfs_iunlock(ip, XFS_IOLOCK_EXCL); |
| 328 | xfs_iunlock(tip, XFS_IOLOCK_EXCL); |
| 329 | xfs_trans_cancel(tp, 0); |
Josef 'Jeff' Sipek | ef8f7fc | 2009-02-04 09:37:43 +0100 | [diff] [blame] | 330 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | } |
Christoph Hellwig | e1cccd9 | 2008-08-13 16:18:07 +1000 | [diff] [blame] | 332 | xfs_lock_two_inodes(ip, tip, XFS_ILOCK_EXCL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 333 | |
| 334 | /* |
| 335 | * Count the number of extended attribute blocks |
| 336 | */ |
| 337 | if ( ((XFS_IFORK_Q(ip) != 0) && (ip->i_d.di_anextents > 0)) && |
| 338 | (ip->i_d.di_aformat != XFS_DINODE_FMT_LOCAL)) { |
| 339 | error = xfs_bmap_count_blocks(tp, ip, XFS_ATTR_FORK, &aforkblks); |
Josef 'Jeff' Sipek | ef8f7fc | 2009-02-04 09:37:43 +0100 | [diff] [blame] | 340 | if (error) |
| 341 | goto out_trans_cancel; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 342 | } |
| 343 | if ( ((XFS_IFORK_Q(tip) != 0) && (tip->i_d.di_anextents > 0)) && |
| 344 | (tip->i_d.di_aformat != XFS_DINODE_FMT_LOCAL)) { |
| 345 | error = xfs_bmap_count_blocks(tp, tip, XFS_ATTR_FORK, |
| 346 | &taforkblks); |
Josef 'Jeff' Sipek | ef8f7fc | 2009-02-04 09:37:43 +0100 | [diff] [blame] | 347 | if (error) |
| 348 | goto out_trans_cancel; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | } |
| 350 | |
| 351 | /* |
| 352 | * Swap the data forks of the inodes |
| 353 | */ |
| 354 | ifp = &ip->i_df; |
| 355 | tifp = &tip->i_df; |
Eric Sandeen | d0cfb37 | 2005-11-02 10:29:04 +1100 | [diff] [blame] | 356 | *tempifp = *ifp; /* struct copy */ |
| 357 | *ifp = *tifp; /* struct copy */ |
| 358 | *tifp = *tempifp; /* struct copy */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | |
| 360 | /* |
| 361 | * Fix the on-disk inode values |
| 362 | */ |
| 363 | tmp = (__uint64_t)ip->i_d.di_nblocks; |
| 364 | ip->i_d.di_nblocks = tip->i_d.di_nblocks - taforkblks + aforkblks; |
| 365 | tip->i_d.di_nblocks = tmp + taforkblks - aforkblks; |
| 366 | |
| 367 | tmp = (__uint64_t) ip->i_d.di_nextents; |
| 368 | ip->i_d.di_nextents = tip->i_d.di_nextents; |
| 369 | tip->i_d.di_nextents = tmp; |
| 370 | |
| 371 | tmp = (__uint64_t) ip->i_d.di_format; |
| 372 | ip->i_d.di_format = tip->i_d.di_format; |
| 373 | tip->i_d.di_format = tmp; |
| 374 | |
Dave Chinner | 309c848 | 2010-11-30 15:16:02 +1100 | [diff] [blame] | 375 | /* |
| 376 | * The extents in the source inode could still contain speculative |
| 377 | * preallocation beyond EOF (e.g. the file is open but not modified |
| 378 | * while defrag is in progress). In that case, we need to copy over the |
| 379 | * number of delalloc blocks the data fork in the source inode is |
| 380 | * tracking beyond EOF so that when the fork is truncated away when the |
| 381 | * temporary inode is unlinked we don't underrun the i_delayed_blks |
| 382 | * counter on that inode. |
| 383 | */ |
| 384 | ASSERT(tip->i_delayed_blks == 0); |
| 385 | tip->i_delayed_blks = ip->i_delayed_blks; |
| 386 | ip->i_delayed_blks = 0; |
| 387 | |
Christoph Hellwig | f5d8d5c | 2012-02-29 09:53:54 +0000 | [diff] [blame^] | 388 | src_log_flags = XFS_ILOG_CORE; |
| 389 | switch (ip->i_d.di_format) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | case XFS_DINODE_FMT_EXTENTS: |
| 391 | /* If the extents fit in the inode, fix the |
| 392 | * pointer. Otherwise it's already NULL or |
| 393 | * pointing to the extent. |
| 394 | */ |
| 395 | if (ip->i_d.di_nextents <= XFS_INLINE_EXTS) { |
| 396 | ifp->if_u1.if_extents = |
| 397 | ifp->if_u2.if_inline_ext; |
| 398 | } |
Christoph Hellwig | f5d8d5c | 2012-02-29 09:53:54 +0000 | [diff] [blame^] | 399 | src_log_flags |= XFS_ILOG_DEXT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 400 | break; |
| 401 | case XFS_DINODE_FMT_BTREE: |
Christoph Hellwig | f5d8d5c | 2012-02-29 09:53:54 +0000 | [diff] [blame^] | 402 | src_log_flags |= XFS_ILOG_DBROOT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 403 | break; |
| 404 | } |
| 405 | |
Christoph Hellwig | f5d8d5c | 2012-02-29 09:53:54 +0000 | [diff] [blame^] | 406 | target_log_flags = XFS_ILOG_CORE; |
| 407 | switch (tip->i_d.di_format) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | case XFS_DINODE_FMT_EXTENTS: |
| 409 | /* If the extents fit in the inode, fix the |
| 410 | * pointer. Otherwise it's already NULL or |
| 411 | * pointing to the extent. |
| 412 | */ |
| 413 | if (tip->i_d.di_nextents <= XFS_INLINE_EXTS) { |
| 414 | tifp->if_u1.if_extents = |
| 415 | tifp->if_u2.if_inline_ext; |
| 416 | } |
Christoph Hellwig | f5d8d5c | 2012-02-29 09:53:54 +0000 | [diff] [blame^] | 417 | target_log_flags |= XFS_ILOG_DEXT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 418 | break; |
| 419 | case XFS_DINODE_FMT_BTREE: |
Christoph Hellwig | f5d8d5c | 2012-02-29 09:53:54 +0000 | [diff] [blame^] | 420 | target_log_flags |= XFS_ILOG_DBROOT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | break; |
| 422 | } |
| 423 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | |
Christoph Hellwig | ddc3415 | 2011-09-19 15:00:54 +0000 | [diff] [blame] | 425 | xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); |
| 426 | xfs_trans_ijoin(tp, tip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 427 | |
Christoph Hellwig | f5d8d5c | 2012-02-29 09:53:54 +0000 | [diff] [blame^] | 428 | xfs_trans_log_inode(tp, ip, src_log_flags); |
| 429 | xfs_trans_log_inode(tp, tip, target_log_flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | |
| 431 | /* |
| 432 | * If this is a synchronous mount, make sure that the |
| 433 | * transaction goes to disk before returning to the user. |
| 434 | */ |
Josef 'Jeff' Sipek | ef8f7fc | 2009-02-04 09:37:43 +0100 | [diff] [blame] | 435 | if (mp->m_flags & XFS_MOUNT_WSYNC) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 436 | xfs_trans_set_sync(tp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 437 | |
Christoph Hellwig | 815cb21 | 2011-09-26 09:14:34 +0000 | [diff] [blame] | 438 | error = xfs_trans_commit(tp, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | |
Dave Chinner | 3a85cd9 | 2010-01-14 01:33:55 +0000 | [diff] [blame] | 440 | trace_xfs_swap_extent_after(ip, 0); |
| 441 | trace_xfs_swap_extent_after(tip, 1); |
Josef 'Jeff' Sipek | ef8f7fc | 2009-02-04 09:37:43 +0100 | [diff] [blame] | 442 | out: |
| 443 | kmem_free(tempifp); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | return error; |
Josef 'Jeff' Sipek | ef8f7fc | 2009-02-04 09:37:43 +0100 | [diff] [blame] | 445 | |
Felix Blyakher | 1f23920 | 2009-05-07 19:49:45 -0500 | [diff] [blame] | 446 | out_unlock: |
| 447 | xfs_iunlock(ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); |
| 448 | xfs_iunlock(tip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL); |
| 449 | goto out; |
| 450 | |
Josef 'Jeff' Sipek | ef8f7fc | 2009-02-04 09:37:43 +0100 | [diff] [blame] | 451 | out_trans_cancel: |
| 452 | xfs_trans_cancel(tp, 0); |
| 453 | goto out_unlock; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | } |