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authorNathan Scott <nathans@sgi.com>2006-06-18 18:39:53 -0400
committerNathan Scott <nathans@sgi.com>2006-06-18 18:39:53 -0400
commit1e69dd0eb354d6f1a77098a3946b5ba57d4e3109 (patch)
treef97ce9c94f72cf142831ad12a701fc6378dc279f /fs/xfs/linux-2.6
parent1d47bec290a6f1f366192946840efef5076d9fc7 (diff)
[XFS] Push some common code out of write path into core XFS code for
sharing. SGI-PV: 904196 SGI-Modid: xfs-linux-melb:xfs-kern:26248a Signed-off-by: Nathan Scott <nathans@sgi.com>
Diffstat (limited to 'fs/xfs/linux-2.6')
-rw-r--r--fs/xfs/linux-2.6/xfs_lrw.c76
1 files changed, 3 insertions, 73 deletions
diff --git a/fs/xfs/linux-2.6/xfs_lrw.c b/fs/xfs/linux-2.6/xfs_lrw.c
index 3e76c5c9dda1..8e5468704816 100644
--- a/fs/xfs/linux-2.6/xfs_lrw.c
+++ b/fs/xfs/linux-2.6/xfs_lrw.c
@@ -892,79 +892,9 @@ retry:
892 892
893 /* Handle various SYNC-type writes */ 893 /* Handle various SYNC-type writes */
894 if ((file->f_flags & O_SYNC) || IS_SYNC(inode)) { 894 if ((file->f_flags & O_SYNC) || IS_SYNC(inode)) {
895 /* 895 error = xfs_write_sync_logforce(mp, xip);
896 * If we're treating this as O_DSYNC and we have not updated the 896 if (error)
897 * size, force the log. 897 goto out_unlock_internal;
898 */
899 if (!(mp->m_flags & XFS_MOUNT_OSYNCISOSYNC) &&
900 !(xip->i_update_size)) {
901 xfs_inode_log_item_t *iip = xip->i_itemp;
902
903 /*
904 * If an allocation transaction occurred
905 * without extending the size, then we have to force
906 * the log up the proper point to ensure that the
907 * allocation is permanent. We can't count on
908 * the fact that buffered writes lock out direct I/O
909 * writes - the direct I/O write could have extended
910 * the size nontransactionally, then finished before
911 * we started. xfs_write_file will think that the file
912 * didn't grow but the update isn't safe unless the
913 * size change is logged.
914 *
915 * Force the log if we've committed a transaction
916 * against the inode or if someone else has and
917 * the commit record hasn't gone to disk (e.g.
918 * the inode is pinned). This guarantees that
919 * all changes affecting the inode are permanent
920 * when we return.
921 */
922 if (iip && iip->ili_last_lsn) {
923 xfs_log_force(mp, iip->ili_last_lsn,
924 XFS_LOG_FORCE | XFS_LOG_SYNC);
925 } else if (xfs_ipincount(xip) > 0) {
926 xfs_log_force(mp, (xfs_lsn_t)0,
927 XFS_LOG_FORCE | XFS_LOG_SYNC);
928 }
929
930 } else {
931 xfs_trans_t *tp;
932
933 /*
934 * O_SYNC or O_DSYNC _with_ a size update are handled
935 * the same way.
936 *
937 * If the write was synchronous then we need to make
938 * sure that the inode modification time is permanent.
939 * We'll have updated the timestamp above, so here
940 * we use a synchronous transaction to log the inode.
941 * It's not fast, but it's necessary.
942 *
943 * If this a dsync write and the size got changed
944 * non-transactionally, then we need to ensure that
945 * the size change gets logged in a synchronous
946 * transaction.
947 */
948
949 tp = xfs_trans_alloc(mp, XFS_TRANS_WRITE_SYNC);
950 if ((error = xfs_trans_reserve(tp, 0,
951 XFS_SWRITE_LOG_RES(mp),
952 0, 0, 0))) {
953 /* Transaction reserve failed */
954 xfs_trans_cancel(tp, 0);
955 } else {
956 /* Transaction reserve successful */
957 xfs_ilock(xip, XFS_ILOCK_EXCL);
958 xfs_trans_ijoin(tp, xip, XFS_ILOCK_EXCL);
959 xfs_trans_ihold(tp, xip);
960 xfs_trans_log_inode(tp, xip, XFS_ILOG_CORE);
961 xfs_trans_set_sync(tp);
962 error = xfs_trans_commit(tp, 0, NULL);
963 xfs_iunlock(xip, XFS_ILOCK_EXCL);
964 }
965 if (error)
966 goto out_unlock_internal;
967 }
968 898
969 xfs_rwunlock(bdp, locktype); 899 xfs_rwunlock(bdp, locktype);
970 if (need_i_mutex) 900 if (need_i_mutex)