blob: 1137bbc5eccba64c1a53fc4ff91a3b950da7b81f [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
Olaf Weber3e57ecf2006-06-09 14:48:12 +10002 * Copyright (c) 2000-2006 Silicon Graphics, Inc.
Nathan Scott7b718762005-11-02 14:58:39 +11003 * All Rights Reserved.
Linus Torvalds1da177e2005-04-16 15:20:36 -07004 *
Nathan Scott7b718762005-11-02 14:58:39 +11005 * This program is free software; you can redistribute it and/or
6 * modify it under the terms of the GNU General Public License as
Linus Torvalds1da177e2005-04-16 15:20:36 -07007 * published by the Free Software Foundation.
8 *
Nathan Scott7b718762005-11-02 14:58:39 +11009 * This program is distributed in the hope that it would be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
Linus Torvalds1da177e2005-04-16 15:20:36 -070013 *
Nathan Scott7b718762005-11-02 14:58:39 +110014 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write the Free Software Foundation,
16 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
Linus Torvalds1da177e2005-04-16 15:20:36 -070017 */
Linus Torvalds1da177e2005-04-16 15:20:36 -070018#include "xfs.h"
Nathan Scotta844f452005-11-02 14:38:42 +110019#include "xfs_fs.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070020#include "xfs_types.h"
Nathan Scotta844f452005-11-02 14:38:42 +110021#include "xfs_bit.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070022#include "xfs_log.h"
Nathan Scotta844f452005-11-02 14:38:42 +110023#include "xfs_inum.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070024#include "xfs_trans.h"
25#include "xfs_sb.h"
Nathan Scotta844f452005-11-02 14:38:42 +110026#include "xfs_ag.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070027#include "xfs_mount.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070028#include "xfs_bmap_btree.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070029#include "xfs_dinode.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#include "xfs_inode.h"
Nathan Scotta844f452005-11-02 14:38:42 +110031#include "xfs_inode_item.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070032#include "xfs_bmap.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070033#include "xfs_itable.h"
34#include "xfs_dfrag.h"
35#include "xfs_error.h"
Christoph Hellwig739bfb22007-08-29 10:58:01 +100036#include "xfs_vnodeops.h"
Christoph Hellwig0b1b2132009-12-14 23:14:59 +000037#include "xfs_trace.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070038
Dave Chinner6bded0f2010-01-14 01:33:56 +000039
40static 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 Torvalds1da177e2005-04-16 15:20:36 -070045/*
Dave Chinner6bded0f2010-01-14 01:33:56 +000046 * ioctl interface for swapext
Linus Torvalds1da177e2005-04-16 15:20:36 -070047 */
48int
49xfs_swapext(
sandeen@sandeen.net743bb462008-11-25 21:20:06 -060050 xfs_swapext_t *sxp)
Linus Torvalds1da177e2005-04-16 15:20:36 -070051{
Christoph Hellwig35fec8d2008-02-05 12:13:07 +110052 xfs_inode_t *ip, *tip;
Dave Chinner6bded0f2010-01-14 01:33:56 +000053 struct file *file, *tmp_file;
Linus Torvalds1da177e2005-04-16 15:20:36 -070054 int error = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -070055
Linus Torvalds1da177e2005-04-16 15:20:36 -070056 /* Pull information for the target fd */
Christoph Hellwig35fec8d2008-02-05 12:13:07 +110057 file = fget((int)sxp->sx_fdtarget);
58 if (!file) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070059 error = XFS_ERROR(EINVAL);
Eric Sandeenac12b4e2009-01-25 20:53:00 -060060 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -070061 }
62
Dan Rosenberg18171762010-06-24 12:07:47 +100063 if (!(file->f_mode & FMODE_WRITE) ||
64 !(file->f_mode & FMODE_READ) ||
65 (file->f_flags & O_APPEND)) {
Christoph Hellwigf6aa7f22008-02-05 12:13:15 +110066 error = XFS_ERROR(EBADF);
67 goto out_put_file;
68 }
69
Dave Chinner6bded0f2010-01-14 01:33:56 +000070 tmp_file = fget((int)sxp->sx_fdtmp);
71 if (!tmp_file) {
Linus Torvalds1da177e2005-04-16 15:20:36 -070072 error = XFS_ERROR(EINVAL);
Christoph Hellwig35fec8d2008-02-05 12:13:07 +110073 goto out_put_file;
Linus Torvalds1da177e2005-04-16 15:20:36 -070074 }
75
Dave Chinner6bded0f2010-01-14 01:33:56 +000076 if (!(tmp_file->f_mode & FMODE_WRITE) ||
Dan Rosenberg18171762010-06-24 12:07:47 +100077 !(tmp_file->f_mode & FMODE_READ) ||
Dave Chinner6bded0f2010-01-14 01:33:56 +000078 (tmp_file->f_flags & O_APPEND)) {
Christoph Hellwigf6aa7f22008-02-05 12:13:15 +110079 error = XFS_ERROR(EBADF);
Dave Chinner6bded0f2010-01-14 01:33:56 +000080 goto out_put_tmp_file;
Christoph Hellwigf6aa7f22008-02-05 12:13:15 +110081 }
82
Christoph Hellwig7c8f7af2009-02-12 19:56:00 +010083 if (IS_SWAPFILE(file->f_path.dentry->d_inode) ||
Dave Chinner6bded0f2010-01-14 01:33:56 +000084 IS_SWAPFILE(tmp_file->f_path.dentry->d_inode)) {
Christoph Hellwig7c8f7af2009-02-12 19:56:00 +010085 error = XFS_ERROR(EINVAL);
Dave Chinner6bded0f2010-01-14 01:33:56 +000086 goto out_put_tmp_file;
Christoph Hellwig7c8f7af2009-02-12 19:56:00 +010087 }
88
Christoph Hellwig35fec8d2008-02-05 12:13:07 +110089 ip = XFS_I(file->f_path.dentry->d_inode);
Dave Chinner6bded0f2010-01-14 01:33:56 +000090 tip = XFS_I(tmp_file->f_path.dentry->d_inode);
Linus Torvalds1da177e2005-04-16 15:20:36 -070091
92 if (ip->i_mount != tip->i_mount) {
Christoph Hellwig35fec8d2008-02-05 12:13:07 +110093 error = XFS_ERROR(EINVAL);
Dave Chinner6bded0f2010-01-14 01:33:56 +000094 goto out_put_tmp_file;
Linus Torvalds1da177e2005-04-16 15:20:36 -070095 }
96
97 if (ip->i_ino == tip->i_ino) {
Christoph Hellwig35fec8d2008-02-05 12:13:07 +110098 error = XFS_ERROR(EINVAL);
Dave Chinner6bded0f2010-01-14 01:33:56 +000099 goto out_put_tmp_file;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700100 }
101
Christoph Hellwig35fec8d2008-02-05 12:13:07 +1100102 if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
103 error = XFS_ERROR(EIO);
Dave Chinner6bded0f2010-01-14 01:33:56 +0000104 goto out_put_tmp_file;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700105 }
106
Lachlan McIlroy541d7d32007-10-11 17:34:33 +1000107 error = xfs_swap_extents(ip, tip, sxp);
Olaf Weber3e57ecf2006-06-09 14:48:12 +1000108
Dave Chinner6bded0f2010-01-14 01:33:56 +0000109 out_put_tmp_file:
110 fput(tmp_file);
Christoph Hellwig35fec8d2008-02-05 12:13:07 +1100111 out_put_file:
112 fput(file);
Christoph Hellwig35fec8d2008-02-05 12:13:07 +1100113 out:
Olaf Weber3e57ecf2006-06-09 14:48:12 +1000114 return error;
115}
116
Dave Chinnere09f9862010-01-14 01:33:54 +0000117/*
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 */
137static int
138xfs_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 Hellwig8096b1e2011-12-18 20:00:07 +0000166 XFS_IFORK_NEXTENTS(tip, XFS_DATA_FORK) >
167 XFS_IFORK_MAXEXT(ip, XFS_DATA_FORK))
Dave Chinnere09f9862010-01-14 01:33:54 +0000168 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 Hellwig8096b1e2011-12-18 20:00:07 +0000172 XFS_IFORK_NEXTENTS(ip, XFS_DATA_FORK) >
173 XFS_IFORK_MAXEXT(tip, XFS_DATA_FORK))
Dave Chinnere09f9862010-01-14 01:33:54 +0000174 return EINVAL;
175
Dave Chinnerdd77ef92010-04-20 17:00:37 +1000176 /*
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 Hellwig8096b1e2011-12-18 20:00:07 +0000185 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 Chinnere09f9862010-01-14 01:33:54 +0000193
Dave Chinnerdd77ef92010-04-20 17:00:37 +1000194 /* Reciprocal target->temp btree format checks */
Christoph Hellwig8096b1e2011-12-18 20:00:07 +0000195 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 Chinnere09f9862010-01-14 01:33:54 +0000204
205 return 0;
206}
207
Dave Chinner6bded0f2010-01-14 01:33:56 +0000208static int
Olaf Weber3e57ecf2006-06-09 14:48:12 +1000209xfs_swap_extents(
Dave Chinnere09f9862010-01-14 01:33:54 +0000210 xfs_inode_t *ip, /* target inode */
211 xfs_inode_t *tip, /* tmp inode */
Olaf Weber3e57ecf2006-06-09 14:48:12 +1000212 xfs_swapext_t *sxp)
213{
David Sterba45c51b92011-04-13 22:03:28 +0000214 xfs_mount_t *mp = ip->i_mount;
Olaf Weber3e57ecf2006-06-09 14:48:12 +1000215 xfs_trans_t *tp;
216 xfs_bstat_t *sbp = &sxp->sx_stat;
Olaf Weber3e57ecf2006-06-09 14:48:12 +1000217 xfs_ifork_t *tempifp, *ifp, *tifp;
Christoph Hellwigf5d8d5c2012-02-29 09:53:54 +0000218 int src_log_flags, target_log_flags;
Olaf Weber3e57ecf2006-06-09 14:48:12 +1000219 int error = 0;
220 int aforkblks = 0;
221 int taforkblks = 0;
222 __uint64_t tmp;
Olaf Weber3e57ecf2006-06-09 14:48:12 +1000223
Olaf Weber3e57ecf2006-06-09 14:48:12 +1000224 tempifp = kmem_alloc(sizeof(xfs_ifork_t), KM_MAYFAIL);
225 if (!tempifp) {
226 error = XFS_ERROR(ENOMEM);
Josef 'Jeff' Sipekef8f7fc2009-02-04 09:37:43 +0100227 goto out;
Olaf Weber3e57ecf2006-06-09 14:48:12 +1000228 }
229
David Chinnerf9114eb2008-09-17 16:51:21 +1000230 /*
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 Torvalds1da177e2005-04-16 15:20:36 -0700238
Linus Torvalds1da177e2005-04-16 15:20:36 -0700239 /* 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' Sipekef8f7fc2009-02-04 09:37:43 +0100242 goto out_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700243 }
244
245 /* Verify both files are either real-time or non-realtime */
Eric Sandeen71ddabb2007-11-23 16:29:42 +1100246 if (XFS_IS_REALTIME_INODE(ip) != XFS_IS_REALTIME_INODE(tip)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700247 error = XFS_ERROR(EINVAL);
Josef 'Jeff' Sipekef8f7fc2009-02-04 09:37:43 +0100248 goto out_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700249 }
250
Christoph Hellwigdf80c932008-08-13 16:22:09 +1000251 if (VN_CACHED(VFS_I(tip)) != 0) {
Christoph Hellwig739bfb22007-08-29 10:58:01 +1000252 error = xfs_flushinval_pages(tip, 0, -1,
253 FI_REMAPF_LOCKED);
Lachlan McIlroyd3cf2092007-05-08 13:49:27 +1000254 if (error)
Josef 'Jeff' Sipekef8f7fc2009-02-04 09:37:43 +0100255 goto out_unlock;
Christoph Hellwigbd5a8762005-06-21 15:47:39 +1000256 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700257
258 /* Verify O_DIRECT for ftmp */
Christoph Hellwigdf80c932008-08-13 16:22:09 +1000259 if (VN_CACHED(VFS_I(tip)) != 0) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700260 error = XFS_ERROR(EINVAL);
Josef 'Jeff' Sipekef8f7fc2009-02-04 09:37:43 +0100261 goto out_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700262 }
263
264 /* Verify all data are being swapped */
Eric Sandeend0cfb372005-11-02 10:29:04 +1100265 if (sxp->sx_offset != 0 ||
266 sxp->sx_length != ip->i_d.di_size ||
267 sxp->sx_length != tip->i_d.di_size) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700268 error = XFS_ERROR(EFAULT);
Josef 'Jeff' Sipekef8f7fc2009-02-04 09:37:43 +0100269 goto out_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700270 }
271
Dave Chinner3a85cd92010-01-14 01:33:55 +0000272 trace_xfs_swap_extent_before(ip, 0);
273 trace_xfs_swap_extent_before(tip, 1);
274
Dave Chinnere09f9862010-01-14 01:33:54 +0000275 /* check inode formats now that data is flushed */
276 error = xfs_swap_extents_check_format(ip, tip);
277 if (error) {
Dave Chinner53487782011-03-07 10:05:35 +1100278 xfs_notice(mp,
Dave Chinnere09f9862010-01-14 01:33:54 +0000279 "%s: inode 0x%llx format is incompatible for exchanging.",
Dave Chinner53487782011-03-07 10:05:35 +1100280 __func__, ip->i_ino);
Josef 'Jeff' Sipekef8f7fc2009-02-04 09:37:43 +0100281 goto out_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700282 }
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 Hellwigf9581b12009-10-06 20:29:26 +0000291 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 Torvalds1da177e2005-04-16 15:20:36 -0700295 error = XFS_ERROR(EBUSY);
Josef 'Jeff' Sipekef8f7fc2009-02-04 09:37:43 +0100296 goto out_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700297 }
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 Scott67fcaa72006-06-09 17:00:52 +1000302 * vop_read (or write in the case of autogrow) they block on the iolock
Linus Torvalds1da177e2005-04-16 15:20:36 -0700303 * until we have switched the extents.
304 */
Christoph Hellwigdf80c932008-08-13 16:22:09 +1000305 if (VN_MAPPED(VFS_I(ip))) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700306 error = XFS_ERROR(EBUSY);
Josef 'Jeff' Sipekef8f7fc2009-02-04 09:37:43 +0100307 goto out_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700308 }
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 Hellwig739bfb22007-08-29 10:58:01 +1000321 xfs_tosspages(ip, 0, -1, FI_REMAPF);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700322
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' Sipekef8f7fc2009-02-04 09:37:43 +0100330 goto out;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700331 }
Christoph Hellwige1cccd92008-08-13 16:18:07 +1000332 xfs_lock_two_inodes(ip, tip, XFS_ILOCK_EXCL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700333
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' Sipekef8f7fc2009-02-04 09:37:43 +0100340 if (error)
341 goto out_trans_cancel;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700342 }
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' Sipekef8f7fc2009-02-04 09:37:43 +0100347 if (error)
348 goto out_trans_cancel;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700349 }
350
351 /*
352 * Swap the data forks of the inodes
353 */
354 ifp = &ip->i_df;
355 tifp = &tip->i_df;
Eric Sandeend0cfb372005-11-02 10:29:04 +1100356 *tempifp = *ifp; /* struct copy */
357 *ifp = *tifp; /* struct copy */
358 *tifp = *tempifp; /* struct copy */
Linus Torvalds1da177e2005-04-16 15:20:36 -0700359
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 Chinner309c8482010-11-30 15:16:02 +1100375 /*
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 Hellwigf5d8d5c2012-02-29 09:53:54 +0000388 src_log_flags = XFS_ILOG_CORE;
389 switch (ip->i_d.di_format) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700390 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 Hellwigf5d8d5c2012-02-29 09:53:54 +0000399 src_log_flags |= XFS_ILOG_DEXT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700400 break;
401 case XFS_DINODE_FMT_BTREE:
Christoph Hellwigf5d8d5c2012-02-29 09:53:54 +0000402 src_log_flags |= XFS_ILOG_DBROOT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700403 break;
404 }
405
Christoph Hellwigf5d8d5c2012-02-29 09:53:54 +0000406 target_log_flags = XFS_ILOG_CORE;
407 switch (tip->i_d.di_format) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700408 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 Hellwigf5d8d5c2012-02-29 09:53:54 +0000417 target_log_flags |= XFS_ILOG_DEXT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700418 break;
419 case XFS_DINODE_FMT_BTREE:
Christoph Hellwigf5d8d5c2012-02-29 09:53:54 +0000420 target_log_flags |= XFS_ILOG_DBROOT;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700421 break;
422 }
423
Linus Torvalds1da177e2005-04-16 15:20:36 -0700424
Christoph Hellwigddc34152011-09-19 15:00:54 +0000425 xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
426 xfs_trans_ijoin(tp, tip, XFS_ILOCK_EXCL | XFS_IOLOCK_EXCL);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700427
Christoph Hellwigf5d8d5c2012-02-29 09:53:54 +0000428 xfs_trans_log_inode(tp, ip, src_log_flags);
429 xfs_trans_log_inode(tp, tip, target_log_flags);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700430
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' Sipekef8f7fc2009-02-04 09:37:43 +0100435 if (mp->m_flags & XFS_MOUNT_WSYNC)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700436 xfs_trans_set_sync(tp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700437
Christoph Hellwig815cb212011-09-26 09:14:34 +0000438 error = xfs_trans_commit(tp, 0);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700439
Dave Chinner3a85cd92010-01-14 01:33:55 +0000440 trace_xfs_swap_extent_after(ip, 0);
441 trace_xfs_swap_extent_after(tip, 1);
Josef 'Jeff' Sipekef8f7fc2009-02-04 09:37:43 +0100442out:
443 kmem_free(tempifp);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700444 return error;
Josef 'Jeff' Sipekef8f7fc2009-02-04 09:37:43 +0100445
Felix Blyakher1f239202009-05-07 19:49:45 -0500446out_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' Sipekef8f7fc2009-02-04 09:37:43 +0100451out_trans_cancel:
452 xfs_trans_cancel(tp, 0);
453 goto out_unlock;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700454}