xfs: consolidate xfs_rename.c
Move the rename code to xfs_inode.c to continue consolidating
all the kernel xfs_inode operations in the one place.
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index 73a7a1d..279ac3f 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -2268,6 +2268,313 @@
return error;
}
+/*
+ * Enter all inodes for a rename transaction into a sorted array.
+ */
+STATIC void
+xfs_sort_for_rename(
+ xfs_inode_t *dp1, /* in: old (source) directory inode */
+ xfs_inode_t *dp2, /* in: new (target) directory inode */
+ xfs_inode_t *ip1, /* in: inode of old entry */
+ xfs_inode_t *ip2, /* in: inode of new entry, if it
+ already exists, NULL otherwise. */
+ xfs_inode_t **i_tab,/* out: array of inode returned, sorted */
+ int *num_inodes) /* out: number of inodes in array */
+{
+ xfs_inode_t *temp;
+ int i, j;
+
+ /*
+ * i_tab contains a list of pointers to inodes. We initialize
+ * the table here & we'll sort it. We will then use it to
+ * order the acquisition of the inode locks.
+ *
+ * Note that the table may contain duplicates. e.g., dp1 == dp2.
+ */
+ i_tab[0] = dp1;
+ i_tab[1] = dp2;
+ i_tab[2] = ip1;
+ if (ip2) {
+ *num_inodes = 4;
+ i_tab[3] = ip2;
+ } else {
+ *num_inodes = 3;
+ i_tab[3] = NULL;
+ }
+
+ /*
+ * Sort the elements via bubble sort. (Remember, there are at
+ * most 4 elements to sort, so this is adequate.)
+ */
+ for (i = 0; i < *num_inodes; i++) {
+ for (j = 1; j < *num_inodes; j++) {
+ if (i_tab[j]->i_ino < i_tab[j-1]->i_ino) {
+ temp = i_tab[j];
+ i_tab[j] = i_tab[j-1];
+ i_tab[j-1] = temp;
+ }
+ }
+ }
+}
+
+/*
+ * xfs_rename
+ */
+int
+xfs_rename(
+ xfs_inode_t *src_dp,
+ struct xfs_name *src_name,
+ xfs_inode_t *src_ip,
+ xfs_inode_t *target_dp,
+ struct xfs_name *target_name,
+ xfs_inode_t *target_ip)
+{
+ xfs_trans_t *tp = NULL;
+ xfs_mount_t *mp = src_dp->i_mount;
+ int new_parent; /* moving to a new dir */
+ int src_is_directory; /* src_name is a directory */
+ int error;
+ xfs_bmap_free_t free_list;
+ xfs_fsblock_t first_block;
+ int cancel_flags;
+ int committed;
+ xfs_inode_t *inodes[4];
+ int spaceres;
+ int num_inodes;
+
+ trace_xfs_rename(src_dp, target_dp, src_name, target_name);
+
+ new_parent = (src_dp != target_dp);
+ src_is_directory = S_ISDIR(src_ip->i_d.di_mode);
+
+ xfs_sort_for_rename(src_dp, target_dp, src_ip, target_ip,
+ inodes, &num_inodes);
+
+ xfs_bmap_init(&free_list, &first_block);
+ tp = xfs_trans_alloc(mp, XFS_TRANS_RENAME);
+ cancel_flags = XFS_TRANS_RELEASE_LOG_RES;
+ spaceres = XFS_RENAME_SPACE_RES(mp, target_name->len);
+ error = xfs_trans_reserve(tp, spaceres, XFS_RENAME_LOG_RES(mp), 0,
+ XFS_TRANS_PERM_LOG_RES, XFS_RENAME_LOG_COUNT);
+ if (error == ENOSPC) {
+ spaceres = 0;
+ error = xfs_trans_reserve(tp, 0, XFS_RENAME_LOG_RES(mp), 0,
+ XFS_TRANS_PERM_LOG_RES, XFS_RENAME_LOG_COUNT);
+ }
+ if (error) {
+ xfs_trans_cancel(tp, 0);
+ goto std_return;
+ }
+
+ /*
+ * Attach the dquots to the inodes
+ */
+ error = xfs_qm_vop_rename_dqattach(inodes);
+ if (error) {
+ xfs_trans_cancel(tp, cancel_flags);
+ goto std_return;
+ }
+
+ /*
+ * Lock all the participating inodes. Depending upon whether
+ * the target_name exists in the target directory, and
+ * whether the target directory is the same as the source
+ * directory, we can lock from 2 to 4 inodes.
+ */
+ xfs_lock_inodes(inodes, num_inodes, XFS_ILOCK_EXCL);
+
+ /*
+ * Join all the inodes to the transaction. From this point on,
+ * we can rely on either trans_commit or trans_cancel to unlock
+ * them.
+ */
+ xfs_trans_ijoin(tp, src_dp, XFS_ILOCK_EXCL);
+ if (new_parent)
+ xfs_trans_ijoin(tp, target_dp, XFS_ILOCK_EXCL);
+ xfs_trans_ijoin(tp, src_ip, XFS_ILOCK_EXCL);
+ if (target_ip)
+ xfs_trans_ijoin(tp, target_ip, XFS_ILOCK_EXCL);
+
+ /*
+ * If we are using project inheritance, we only allow renames
+ * into our tree when the project IDs are the same; else the
+ * tree quota mechanism would be circumvented.
+ */
+ if (unlikely((target_dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT) &&
+ (xfs_get_projid(target_dp) != xfs_get_projid(src_ip)))) {
+ error = XFS_ERROR(EXDEV);
+ goto error_return;
+ }
+
+ /*
+ * Set up the target.
+ */
+ if (target_ip == NULL) {
+ /*
+ * If there's no space reservation, check the entry will
+ * fit before actually inserting it.
+ */
+ error = xfs_dir_canenter(tp, target_dp, target_name, spaceres);
+ if (error)
+ goto error_return;
+ /*
+ * If target does not exist and the rename crosses
+ * directories, adjust the target directory link count
+ * to account for the ".." reference from the new entry.
+ */
+ error = xfs_dir_createname(tp, target_dp, target_name,
+ src_ip->i_ino, &first_block,
+ &free_list, spaceres);
+ if (error == ENOSPC)
+ goto error_return;
+ if (error)
+ goto abort_return;
+
+ xfs_trans_ichgtime(tp, target_dp,
+ XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
+
+ if (new_parent && src_is_directory) {
+ error = xfs_bumplink(tp, target_dp);
+ if (error)
+ goto abort_return;
+ }
+ } else { /* target_ip != NULL */
+ /*
+ * If target exists and it's a directory, check that both
+ * target and source are directories and that target can be
+ * destroyed, or that neither is a directory.
+ */
+ if (S_ISDIR(target_ip->i_d.di_mode)) {
+ /*
+ * Make sure target dir is empty.
+ */
+ if (!(xfs_dir_isempty(target_ip)) ||
+ (target_ip->i_d.di_nlink > 2)) {
+ error = XFS_ERROR(EEXIST);
+ goto error_return;
+ }
+ }
+
+ /*
+ * Link the source inode under the target name.
+ * If the source inode is a directory and we are moving
+ * it across directories, its ".." entry will be
+ * inconsistent until we replace that down below.
+ *
+ * In case there is already an entry with the same
+ * name at the destination directory, remove it first.
+ */
+ error = xfs_dir_replace(tp, target_dp, target_name,
+ src_ip->i_ino,
+ &first_block, &free_list, spaceres);
+ if (error)
+ goto abort_return;
+
+ xfs_trans_ichgtime(tp, target_dp,
+ XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
+
+ /*
+ * Decrement the link count on the target since the target
+ * dir no longer points to it.
+ */
+ error = xfs_droplink(tp, target_ip);
+ if (error)
+ goto abort_return;
+
+ if (src_is_directory) {
+ /*
+ * Drop the link from the old "." entry.
+ */
+ error = xfs_droplink(tp, target_ip);
+ if (error)
+ goto abort_return;
+ }
+ } /* target_ip != NULL */
+
+ /*
+ * Remove the source.
+ */
+ if (new_parent && src_is_directory) {
+ /*
+ * Rewrite the ".." entry to point to the new
+ * directory.
+ */
+ error = xfs_dir_replace(tp, src_ip, &xfs_name_dotdot,
+ target_dp->i_ino,
+ &first_block, &free_list, spaceres);
+ ASSERT(error != EEXIST);
+ if (error)
+ goto abort_return;
+ }
+
+ /*
+ * We always want to hit the ctime on the source inode.
+ *
+ * This isn't strictly required by the standards since the source
+ * inode isn't really being changed, but old unix file systems did
+ * it and some incremental backup programs won't work without it.
+ */
+ xfs_trans_ichgtime(tp, src_ip, XFS_ICHGTIME_CHG);
+ xfs_trans_log_inode(tp, src_ip, XFS_ILOG_CORE);
+
+ /*
+ * Adjust the link count on src_dp. This is necessary when
+ * renaming a directory, either within one parent when
+ * the target existed, or across two parent directories.
+ */
+ if (src_is_directory && (new_parent || target_ip != NULL)) {
+
+ /*
+ * Decrement link count on src_directory since the
+ * entry that's moved no longer points to it.
+ */
+ error = xfs_droplink(tp, src_dp);
+ if (error)
+ goto abort_return;
+ }
+
+ error = xfs_dir_removename(tp, src_dp, src_name, src_ip->i_ino,
+ &first_block, &free_list, spaceres);
+ if (error)
+ goto abort_return;
+
+ xfs_trans_ichgtime(tp, src_dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
+ xfs_trans_log_inode(tp, src_dp, XFS_ILOG_CORE);
+ if (new_parent)
+ xfs_trans_log_inode(tp, target_dp, XFS_ILOG_CORE);
+
+ /*
+ * If this is a synchronous mount, make sure that the
+ * rename transaction goes to disk before returning to
+ * the user.
+ */
+ if (mp->m_flags & (XFS_MOUNT_WSYNC|XFS_MOUNT_DIRSYNC)) {
+ xfs_trans_set_sync(tp);
+ }
+
+ error = xfs_bmap_finish(&tp, &free_list, &committed);
+ if (error) {
+ xfs_bmap_cancel(&free_list);
+ xfs_trans_cancel(tp, (XFS_TRANS_RELEASE_LOG_RES |
+ XFS_TRANS_ABORT));
+ goto std_return;
+ }
+
+ /*
+ * trans_commit will unlock src_ip, target_ip & decrement
+ * the vnode references.
+ */
+ return xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
+
+ abort_return:
+ cancel_flags |= XFS_TRANS_ABORT;
+ error_return:
+ xfs_bmap_cancel(&free_list);
+ xfs_trans_cancel(tp, cancel_flags);
+ std_return:
+ return error;
+}
+
STATIC int
xfs_iflush_cluster(
xfs_inode_t *ip,
@@ -2524,7 +2831,6 @@
return error;
}
-
STATIC int
xfs_iflush_int(
struct xfs_inode *ip,