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-rw-r--r--sys/gnu/fs/xfs/xfs_rename.c636
1 files changed, 0 insertions, 636 deletions
diff --git a/sys/gnu/fs/xfs/xfs_rename.c b/sys/gnu/fs/xfs/xfs_rename.c
deleted file mode 100644
index 995a4ec..0000000
--- a/sys/gnu/fs/xfs/xfs_rename.c
+++ /dev/null
@@ -1,636 +0,0 @@
-/*
- * Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
- * All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it would be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- */
-#include "xfs.h"
-#include "xfs_fs.h"
-#include "xfs_types.h"
-#include "xfs_log.h"
-#include "xfs_inum.h"
-#include "xfs_trans.h"
-#include "xfs_sb.h"
-#include "xfs_dir.h"
-#include "xfs_dir2.h"
-#include "xfs_dmapi.h"
-#include "xfs_mount.h"
-#include "xfs_da_btree.h"
-#include "xfs_bmap_btree.h"
-#include "xfs_dir_sf.h"
-#include "xfs_dir2_sf.h"
-#include "xfs_attr_sf.h"
-#include "xfs_dinode.h"
-#include "xfs_inode.h"
-#include "xfs_inode_item.h"
-#include "xfs_bmap.h"
-#include "xfs_error.h"
-#include "xfs_quota.h"
-#include "xfs_refcache.h"
-#include "xfs_utils.h"
-#include "xfs_trans_space.h"
-#include "xfs_dir_leaf.h"
-
-
-/*
- * Given an array of up to 4 inode pointers, unlock the pointed to inodes.
- * If there are fewer than 4 entries in the array, the empty entries will
- * be at the end and will have NULL pointers in them.
- */
-STATIC void
-xfs_rename_unlock4(
- xfs_inode_t **i_tab,
- uint lock_mode)
-{
- int i;
-
- xfs_iunlock(i_tab[0], lock_mode);
- for (i = 1; i < 4; i++) {
- if (i_tab[i] == NULL) {
- break;
- }
- /*
- * Watch out for duplicate entries in the table.
- */
- if (i_tab[i] != i_tab[i-1]) {
- xfs_iunlock(i_tab[i], lock_mode);
- }
- }
-}
-
-#ifdef DEBUG
-int xfs_rename_skip, xfs_rename_nskip;
-#endif
-
-/*
- * The following routine will acquire the locks required for a rename
- * operation. The code understands the semantics of renames and will
- * validate that name1 exists under dp1 & that name2 may or may not
- * exist under dp2.
- *
- * We are renaming dp1/name1 to dp2/name2.
- *
- * Return ENOENT if dp1 does not exist, other lookup errors, or 0 for success.
- */
-STATIC int
-xfs_lock_for_rename(
- xfs_inode_t *dp1, /* old (source) directory inode */
- xfs_inode_t *dp2, /* new (target) directory inode */
- vname_t *vname1,/* old entry name */
- vname_t *vname2,/* new entry name */
- xfs_inode_t **ipp1, /* inode of old entry */
- xfs_inode_t **ipp2, /* inode of new entry, if it
- already exists, NULL otherwise. */
- xfs_inode_t **i_tab,/* array of inode returned, sorted */
- int *num_inodes) /* number of inodes in array */
-{
- xfs_inode_t *ip1, *ip2, *temp;
- xfs_ino_t inum1, inum2;
- int error;
- int i, j;
- uint lock_mode;
- int diff_dirs = (dp1 != dp2);
-
- ip2 = NULL;
-
- /*
- * First, find out the current inums of the entries so that we
- * can determine the initial locking order. We'll have to
- * sanity check stuff after all the locks have been acquired
- * to see if we still have the right inodes, directories, etc.
- */
- lock_mode = xfs_ilock_map_shared(dp1);
- error = xfs_get_dir_entry(vname1, &ip1);
- if (error) {
- xfs_iunlock_map_shared(dp1, lock_mode);
- return error;
- }
-
- inum1 = ip1->i_ino;
-
- ASSERT(ip1);
- ITRACE(ip1);
-
- /*
- * Unlock dp1 and lock dp2 if they are different.
- */
-
- if (diff_dirs) {
- xfs_iunlock_map_shared(dp1, lock_mode);
- lock_mode = xfs_ilock_map_shared(dp2);
- }
-
- error = xfs_dir_lookup_int(XFS_ITOBHV(dp2), lock_mode,
- vname2, &inum2, &ip2);
- if (error == ENOENT) { /* target does not need to exist. */
- inum2 = 0;
- } else if (error) {
- /*
- * If dp2 and dp1 are the same, the next line unlocks dp1.
- * Got it?
- */
- xfs_iunlock_map_shared(dp2, lock_mode);
- IRELE (ip1);
- return error;
- } else {
- ITRACE(ip2);
- }
-
- /*
- * 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 (inum2 == 0) {
- *num_inodes = 3;
- i_tab[3] = NULL;
- } else {
- *num_inodes = 4;
- i_tab[3] = ip2;
- }
-
- /*
- * 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;
- }
- }
- }
-
- /*
- * We have dp2 locked. If it isn't first, unlock it.
- * If it is first, tell xfs_lock_inodes so it can skip it
- * when locking. if dp1 == dp2, xfs_lock_inodes will skip both
- * since they are equal. xfs_lock_inodes needs all these inodes
- * so that it can unlock and retry if there might be a dead-lock
- * potential with the log.
- */
-
- if (i_tab[0] == dp2 && lock_mode == XFS_ILOCK_SHARED) {
-#ifdef DEBUG
- xfs_rename_skip++;
-#endif
- xfs_lock_inodes(i_tab, *num_inodes, 1, XFS_ILOCK_SHARED);
- } else {
-#ifdef DEBUG
- xfs_rename_nskip++;
-#endif
- xfs_iunlock_map_shared(dp2, lock_mode);
- xfs_lock_inodes(i_tab, *num_inodes, 0, XFS_ILOCK_SHARED);
- }
-
- /*
- * Set the return value. Null out any unused entries in i_tab.
- */
- *ipp1 = *ipp2 = NULL;
- for (i=0; i < *num_inodes; i++) {
- if (i_tab[i]->i_ino == inum1) {
- *ipp1 = i_tab[i];
- }
- if (i_tab[i]->i_ino == inum2) {
- *ipp2 = i_tab[i];
- }
- }
- for (;i < 4; i++) {
- i_tab[i] = NULL;
- }
- return 0;
-}
-
-/*
- * xfs_rename
- */
-int
-xfs_rename(
- bhv_desc_t *src_dir_bdp,
- vname_t *src_vname,
- xfs_vnode_t *target_dir_vp,
- vname_t *target_vname,
- cred_t *credp)
-{
- xfs_trans_t *tp;
- xfs_inode_t *src_dp, *target_dp, *src_ip, *target_ip;
- xfs_mount_t *mp;
- 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 target_ip_dropped = 0; /* dropped target_ip link? */
- xfs_vnode_t *src_dir_vp;
- int spaceres;
- int target_link_zero = 0;
- int num_inodes;
- char *src_name = VNAME(src_vname);
- char *target_name = VNAME(target_vname);
- int src_namelen = VNAMELEN(src_vname);
- int target_namelen = VNAMELEN(target_vname);
-
- src_dir_vp = BHV_TO_VNODE(src_dir_bdp);
- vn_trace_entry(src_dir_vp, "xfs_rename", (inst_t *)__return_address);
- vn_trace_entry(target_dir_vp, "xfs_rename", (inst_t *)__return_address);
-
- /*
- * Find the XFS behavior descriptor for the target directory
- * vnode since it was not handed to us.
- */
- target_dp = xfs_vtoi(target_dir_vp);
- if (target_dp == NULL) {
- return XFS_ERROR(EXDEV);
- }
-
- src_dp = XFS_BHVTOI(src_dir_bdp);
- mp = src_dp->i_mount;
-
- if (DM_EVENT_ENABLED(src_dir_vp->v_vfsp, src_dp, DM_EVENT_RENAME) ||
- DM_EVENT_ENABLED(target_dir_vp->v_vfsp,
- target_dp, DM_EVENT_RENAME)) {
- error = XFS_SEND_NAMESP(mp, DM_EVENT_RENAME,
- src_dir_vp, DM_RIGHT_NULL,
- target_dir_vp, DM_RIGHT_NULL,
- src_name, target_name,
- 0, 0, 0);
- if (error) {
- return error;
- }
- }
- /* Return through std_return after this point. */
-
- /*
- * 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_for_rename() will return ENOENT if src_name
- * does not exist in the source directory.
- */
- tp = NULL;
- error = xfs_lock_for_rename(src_dp, target_dp, src_vname,
- target_vname, &src_ip, &target_ip, inodes,
- &num_inodes);
-
- if (error) {
- /*
- * We have nothing locked, no inode references, and
- * no transaction, so just get out.
- */
- goto std_return;
- }
-
- ASSERT(src_ip != NULL);
-
- if ((src_ip->i_d.di_mode & S_IFMT) == S_IFDIR) {
- /*
- * Check for link count overflow on target_dp
- */
- if (target_ip == NULL && (src_dp != target_dp) &&
- target_dp->i_d.di_nlink >= XFS_MAXLINK) {
- error = XFS_ERROR(EMLINK);
- xfs_rename_unlock4(inodes, XFS_ILOCK_SHARED);
- goto rele_return;
- }
- }
-
- new_parent = (src_dp != target_dp);
- src_is_directory = ((src_ip->i_d.di_mode & S_IFMT) == S_IFDIR);
-
- /*
- * Drop the locks on our inodes so that we can start the transaction.
- */
- xfs_rename_unlock4(inodes, XFS_ILOCK_SHARED);
-
- 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_namelen);
- 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 rele_return;
- }
-
- /*
- * Attach the dquots to the inodes
- */
- if ((error = XFS_QM_DQVOPRENAME(mp, inodes))) {
- xfs_trans_cancel(tp, cancel_flags);
- goto rele_return;
- }
-
- /*
- * Reacquire the inode locks we dropped above.
- */
- xfs_lock_inodes(inodes, num_inodes, 0, 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. Note that we need to add a vnode reference to the
- * directories since trans_commit & trans_cancel will decrement
- * them when they unlock the inodes. Also, we need to be careful
- * not to add an inode to the transaction more than once.
- */
- VN_HOLD(src_dir_vp);
- xfs_trans_ijoin(tp, src_dp, XFS_ILOCK_EXCL);
- if (new_parent) {
- VN_HOLD(target_dir_vp);
- xfs_trans_ijoin(tp, target_dp, XFS_ILOCK_EXCL);
- }
- if ((src_ip != src_dp) && (src_ip != target_dp)) {
- xfs_trans_ijoin(tp, src_ip, XFS_ILOCK_EXCL);
- }
- if ((target_ip != NULL) &&
- (target_ip != src_ip) &&
- (target_ip != src_dp) &&
- (target_ip != target_dp)) {
- xfs_trans_ijoin(tp, target_ip, XFS_ILOCK_EXCL);
- }
-
- /*
- * Set up the target.
- */
- if (target_ip == NULL) {
- /*
- * If there's no space reservation, check the entry will
- * fit before actually inserting it.
- */
- if (spaceres == 0 &&
- (error = XFS_DIR_CANENTER(mp, tp, target_dp, target_name,
- target_namelen))) {
- 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(mp, tp, target_dp, target_name,
- target_namelen, src_ip->i_ino,
- &first_block, &free_list, spaceres);
- if (error == ENOSPC) {
- goto error_return;
- }
- if (error) {
- goto abort_return;
- }
- xfs_ichgtime(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 ((target_ip->i_d.di_mode & S_IFMT) == S_IFDIR) {
- /*
- * Make sure target dir is empty.
- */
- if (!(XFS_DIR_ISEMPTY(target_ip->i_mount, 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(mp, tp, target_dp, target_name,
- target_namelen, src_ip->i_ino, &first_block,
- &free_list, spaceres);
- if (error) {
- goto abort_return;
- }
- xfs_ichgtime(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;
- }
- target_ip_dropped = 1;
-
- if (src_is_directory) {
- /*
- * Drop the link from the old "." entry.
- */
- error = xfs_droplink(tp, target_ip);
- if (error) {
- goto abort_return;
- }
- }
-
- /* Do this test while we still hold the locks */
- target_link_zero = (target_ip)->i_d.di_nlink==0;
-
- } /* 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(mp, tp, src_ip, "..", 2,
- target_dp->i_ino, &first_block,
- &free_list, spaceres);
- ASSERT(error != EEXIST);
- if (error) {
- goto abort_return;
- }
- xfs_ichgtime(src_ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
-
- } else {
- /*
- * We always want to hit the ctime on the source inode.
- * We do it in the if clause above for the 'new_parent &&
- * src_is_directory' case, and here we get all the other
- * cases. 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_ichgtime(src_ip, XFS_ICHGTIME_CHG);
- }
-
- /*
- * 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(mp, tp, src_dp, src_name, src_namelen,
- src_ip->i_ino, &first_block, &free_list, spaceres);
- if (error) {
- goto abort_return;
- }
- xfs_ichgtime(src_dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
-
- /*
- * Update the generation counts on all the directory inodes
- * that we're modifying.
- */
- src_dp->i_gen++;
- xfs_trans_log_inode(tp, src_dp, XFS_ILOG_CORE);
-
- if (new_parent) {
- target_dp->i_gen++;
- xfs_trans_log_inode(tp, target_dp, XFS_ILOG_CORE);
- }
-
- /*
- * If there was a target inode, take an extra reference on
- * it here so that it doesn't go to xfs_inactive() from
- * within the commit.
- */
- if (target_ip != NULL) {
- IHOLD(target_ip);
- }
-
- /*
- * 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);
- }
-
- /*
- * Take refs. for vop_link_removed calls below. No need to worry
- * about directory refs. because the caller holds them.
- *
- * Do holds before the xfs_bmap_finish since it might rele them down
- * to zero.
- */
-
- if (target_ip_dropped)
- IHOLD(target_ip);
- IHOLD(src_ip);
-
- error = xfs_bmap_finish(&tp, &free_list, first_block, &committed);
- if (error) {
- xfs_bmap_cancel(&free_list);
- xfs_trans_cancel(tp, (XFS_TRANS_RELEASE_LOG_RES |
- XFS_TRANS_ABORT));
- if (target_ip != NULL) {
- IRELE(target_ip);
- }
- if (target_ip_dropped) {
- IRELE(target_ip);
- }
- IRELE(src_ip);
- goto std_return;
- }
-
- /*
- * trans_commit will unlock src_ip, target_ip & decrement
- * the vnode references.
- */
- error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES, NULL);
- if (target_ip != NULL) {
- xfs_refcache_purge_ip(target_ip);
- IRELE(target_ip);
- }
- /*
- * Let interposed file systems know about removed links.
- */
- if (target_ip_dropped) {
- XVOP_LINK_REMOVED(XFS_ITOV(target_ip), target_dir_vp,
- target_link_zero);
- IRELE(target_ip);
- }
-
- IRELE(src_ip);
-
- /* Fall through to std_return with error = 0 or errno from
- * xfs_trans_commit */
-std_return:
- if (DM_EVENT_ENABLED(src_dir_vp->v_vfsp, src_dp, DM_EVENT_POSTRENAME) ||
- DM_EVENT_ENABLED(target_dir_vp->v_vfsp,
- target_dp, DM_EVENT_POSTRENAME)) {
- (void) XFS_SEND_NAMESP (mp, DM_EVENT_POSTRENAME,
- src_dir_vp, DM_RIGHT_NULL,
- target_dir_vp, DM_RIGHT_NULL,
- src_name, target_name,
- 0, error, 0);
- }
- return error;
-
- abort_return:
- cancel_flags |= XFS_TRANS_ABORT;
- /* FALLTHROUGH */
- error_return:
- xfs_bmap_cancel(&free_list);
- xfs_trans_cancel(tp, cancel_flags);
- goto std_return;
-
- rele_return:
- IRELE(src_ip);
- if (target_ip != NULL) {
- IRELE(target_ip);
- }
- goto std_return;
-}
-
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