![Carlos Maiolino](/assets/img/avatar_default.png)
By splitting the b_fspriv field into two different fields (b_log_item and b_li_list). It's possible to get rid of an old ABI workaround, by using the new b_log_item field to store xfs_buf_log_item separated from the log items attached to the buffer, which will be linked in the new b_li_list field. This way, there is no more need to reorder the log items list to place the buf_log_item at the beginning of the list, simplifying a bit the logic to handle buffer IO. This also opens the possibility to change buffer's log items list into a proper list_head. b_log_item field is still defined as a void *, because it is still used by the log buffers to store xlog_in_core structures, and there is no need to add an extra field on xfs_buf just for xlog_in_core. Signed-off-by: Carlos Maiolino <cmaiolino@redhat.com> Reviewed-by: Bill O'Donnell <billodo@redhat.com> Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com> [darrick: minor style changes] Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
1260 lines
35 KiB
C
1260 lines
35 KiB
C
/*
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* Copyright (c) 2000-2003,2005 Silicon Graphics, Inc.
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* Copyright (c) 2013 Red Hat, Inc.
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* All Rights Reserved.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it would be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "xfs.h"
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#include "xfs_fs.h"
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#include "xfs_format.h"
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#include "xfs_log_format.h"
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#include "xfs_trans_resv.h"
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#include "xfs_mount.h"
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#include "xfs_da_format.h"
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#include "xfs_da_btree.h"
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#include "xfs_inode.h"
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#include "xfs_trans.h"
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#include "xfs_inode_item.h"
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#include "xfs_bmap.h"
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#include "xfs_buf_item.h"
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#include "xfs_dir2.h"
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#include "xfs_dir2_priv.h"
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#include "xfs_error.h"
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#include "xfs_trace.h"
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#include "xfs_cksum.h"
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#include "xfs_log.h"
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/*
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* Local function prototypes.
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*/
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static void xfs_dir2_block_log_leaf(xfs_trans_t *tp, struct xfs_buf *bp,
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int first, int last);
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static void xfs_dir2_block_log_tail(xfs_trans_t *tp, struct xfs_buf *bp);
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static int xfs_dir2_block_lookup_int(xfs_da_args_t *args, struct xfs_buf **bpp,
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int *entno);
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static int xfs_dir2_block_sort(const void *a, const void *b);
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static xfs_dahash_t xfs_dir_hash_dot, xfs_dir_hash_dotdot;
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/*
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* One-time startup routine called from xfs_init().
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*/
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void
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xfs_dir_startup(void)
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{
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xfs_dir_hash_dot = xfs_da_hashname((unsigned char *)".", 1);
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xfs_dir_hash_dotdot = xfs_da_hashname((unsigned char *)"..", 2);
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}
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static xfs_failaddr_t
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xfs_dir3_block_verify(
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struct xfs_buf *bp)
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{
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struct xfs_mount *mp = bp->b_target->bt_mount;
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struct xfs_dir3_blk_hdr *hdr3 = bp->b_addr;
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if (xfs_sb_version_hascrc(&mp->m_sb)) {
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if (hdr3->magic != cpu_to_be32(XFS_DIR3_BLOCK_MAGIC))
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return __this_address;
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if (!uuid_equal(&hdr3->uuid, &mp->m_sb.sb_meta_uuid))
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return __this_address;
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if (be64_to_cpu(hdr3->blkno) != bp->b_bn)
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return __this_address;
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if (!xfs_log_check_lsn(mp, be64_to_cpu(hdr3->lsn)))
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return __this_address;
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} else {
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if (hdr3->magic != cpu_to_be32(XFS_DIR2_BLOCK_MAGIC))
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return __this_address;
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}
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return __xfs_dir3_data_check(NULL, bp);
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}
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static void
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xfs_dir3_block_read_verify(
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struct xfs_buf *bp)
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{
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struct xfs_mount *mp = bp->b_target->bt_mount;
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xfs_failaddr_t fa;
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if (xfs_sb_version_hascrc(&mp->m_sb) &&
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!xfs_buf_verify_cksum(bp, XFS_DIR3_DATA_CRC_OFF))
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xfs_verifier_error(bp, -EFSBADCRC, __this_address);
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else {
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fa = xfs_dir3_block_verify(bp);
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if (fa)
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xfs_verifier_error(bp, -EFSCORRUPTED, fa);
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}
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}
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static void
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xfs_dir3_block_write_verify(
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struct xfs_buf *bp)
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{
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struct xfs_mount *mp = bp->b_target->bt_mount;
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struct xfs_buf_log_item *bip = bp->b_log_item;
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struct xfs_dir3_blk_hdr *hdr3 = bp->b_addr;
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xfs_failaddr_t fa;
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fa = xfs_dir3_block_verify(bp);
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if (fa) {
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xfs_verifier_error(bp, -EFSCORRUPTED, fa);
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return;
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}
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if (!xfs_sb_version_hascrc(&mp->m_sb))
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return;
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if (bip)
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hdr3->lsn = cpu_to_be64(bip->bli_item.li_lsn);
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xfs_buf_update_cksum(bp, XFS_DIR3_DATA_CRC_OFF);
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}
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const struct xfs_buf_ops xfs_dir3_block_buf_ops = {
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.name = "xfs_dir3_block",
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.verify_read = xfs_dir3_block_read_verify,
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.verify_write = xfs_dir3_block_write_verify,
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.verify_struct = xfs_dir3_block_verify,
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};
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int
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xfs_dir3_block_read(
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struct xfs_trans *tp,
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struct xfs_inode *dp,
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struct xfs_buf **bpp)
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{
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struct xfs_mount *mp = dp->i_mount;
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int err;
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err = xfs_da_read_buf(tp, dp, mp->m_dir_geo->datablk, -1, bpp,
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XFS_DATA_FORK, &xfs_dir3_block_buf_ops);
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if (!err && tp && *bpp)
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xfs_trans_buf_set_type(tp, *bpp, XFS_BLFT_DIR_BLOCK_BUF);
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return err;
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}
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static void
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xfs_dir3_block_init(
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struct xfs_mount *mp,
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struct xfs_trans *tp,
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struct xfs_buf *bp,
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struct xfs_inode *dp)
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{
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struct xfs_dir3_blk_hdr *hdr3 = bp->b_addr;
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bp->b_ops = &xfs_dir3_block_buf_ops;
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xfs_trans_buf_set_type(tp, bp, XFS_BLFT_DIR_BLOCK_BUF);
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if (xfs_sb_version_hascrc(&mp->m_sb)) {
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memset(hdr3, 0, sizeof(*hdr3));
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hdr3->magic = cpu_to_be32(XFS_DIR3_BLOCK_MAGIC);
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hdr3->blkno = cpu_to_be64(bp->b_bn);
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hdr3->owner = cpu_to_be64(dp->i_ino);
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uuid_copy(&hdr3->uuid, &mp->m_sb.sb_meta_uuid);
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return;
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}
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hdr3->magic = cpu_to_be32(XFS_DIR2_BLOCK_MAGIC);
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}
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static void
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xfs_dir2_block_need_space(
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struct xfs_inode *dp,
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struct xfs_dir2_data_hdr *hdr,
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struct xfs_dir2_block_tail *btp,
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struct xfs_dir2_leaf_entry *blp,
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__be16 **tagpp,
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struct xfs_dir2_data_unused **dupp,
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struct xfs_dir2_data_unused **enddupp,
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int *compact,
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int len)
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{
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struct xfs_dir2_data_free *bf;
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__be16 *tagp = NULL;
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struct xfs_dir2_data_unused *dup = NULL;
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struct xfs_dir2_data_unused *enddup = NULL;
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*compact = 0;
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bf = dp->d_ops->data_bestfree_p(hdr);
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/*
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* If there are stale entries we'll use one for the leaf.
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*/
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if (btp->stale) {
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if (be16_to_cpu(bf[0].length) >= len) {
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/*
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* The biggest entry enough to avoid compaction.
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*/
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dup = (xfs_dir2_data_unused_t *)
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((char *)hdr + be16_to_cpu(bf[0].offset));
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goto out;
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}
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/*
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* Will need to compact to make this work.
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* Tag just before the first leaf entry.
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*/
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*compact = 1;
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tagp = (__be16 *)blp - 1;
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/* Data object just before the first leaf entry. */
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dup = (xfs_dir2_data_unused_t *)((char *)hdr + be16_to_cpu(*tagp));
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/*
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* If it's not free then the data will go where the
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* leaf data starts now, if it works at all.
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*/
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if (be16_to_cpu(dup->freetag) == XFS_DIR2_DATA_FREE_TAG) {
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if (be16_to_cpu(dup->length) + (be32_to_cpu(btp->stale) - 1) *
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(uint)sizeof(*blp) < len)
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dup = NULL;
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} else if ((be32_to_cpu(btp->stale) - 1) * (uint)sizeof(*blp) < len)
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dup = NULL;
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else
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dup = (xfs_dir2_data_unused_t *)blp;
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goto out;
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}
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/*
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* no stale entries, so just use free space.
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* Tag just before the first leaf entry.
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*/
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tagp = (__be16 *)blp - 1;
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/* Data object just before the first leaf entry. */
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enddup = (xfs_dir2_data_unused_t *)((char *)hdr + be16_to_cpu(*tagp));
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/*
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* If it's not free then can't do this add without cleaning up:
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* the space before the first leaf entry needs to be free so it
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* can be expanded to hold the pointer to the new entry.
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*/
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if (be16_to_cpu(enddup->freetag) == XFS_DIR2_DATA_FREE_TAG) {
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/*
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* Check out the biggest freespace and see if it's the same one.
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*/
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dup = (xfs_dir2_data_unused_t *)
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((char *)hdr + be16_to_cpu(bf[0].offset));
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if (dup != enddup) {
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/*
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* Not the same free entry, just check its length.
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*/
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if (be16_to_cpu(dup->length) < len)
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dup = NULL;
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goto out;
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}
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/*
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* It is the biggest freespace, can it hold the leaf too?
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*/
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if (be16_to_cpu(dup->length) < len + (uint)sizeof(*blp)) {
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/*
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* Yes, use the second-largest entry instead if it works.
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*/
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if (be16_to_cpu(bf[1].length) >= len)
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dup = (xfs_dir2_data_unused_t *)
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((char *)hdr + be16_to_cpu(bf[1].offset));
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else
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dup = NULL;
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}
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}
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out:
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*tagpp = tagp;
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*dupp = dup;
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*enddupp = enddup;
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}
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/*
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* compact the leaf entries.
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* Leave the highest-numbered stale entry stale.
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* XXX should be the one closest to mid but mid is not yet computed.
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*/
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static void
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xfs_dir2_block_compact(
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struct xfs_da_args *args,
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struct xfs_buf *bp,
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struct xfs_dir2_data_hdr *hdr,
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struct xfs_dir2_block_tail *btp,
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struct xfs_dir2_leaf_entry *blp,
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int *needlog,
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int *lfloghigh,
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int *lfloglow)
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{
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int fromidx; /* source leaf index */
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int toidx; /* target leaf index */
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int needscan = 0;
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int highstale; /* high stale index */
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fromidx = toidx = be32_to_cpu(btp->count) - 1;
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highstale = *lfloghigh = -1;
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for (; fromidx >= 0; fromidx--) {
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if (blp[fromidx].address == cpu_to_be32(XFS_DIR2_NULL_DATAPTR)) {
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if (highstale == -1)
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highstale = toidx;
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else {
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if (*lfloghigh == -1)
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*lfloghigh = toidx;
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continue;
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}
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}
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if (fromidx < toidx)
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blp[toidx] = blp[fromidx];
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toidx--;
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}
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*lfloglow = toidx + 1 - (be32_to_cpu(btp->stale) - 1);
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*lfloghigh -= be32_to_cpu(btp->stale) - 1;
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be32_add_cpu(&btp->count, -(be32_to_cpu(btp->stale) - 1));
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xfs_dir2_data_make_free(args, bp,
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(xfs_dir2_data_aoff_t)((char *)blp - (char *)hdr),
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(xfs_dir2_data_aoff_t)((be32_to_cpu(btp->stale) - 1) * sizeof(*blp)),
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needlog, &needscan);
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btp->stale = cpu_to_be32(1);
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/*
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* If we now need to rebuild the bestfree map, do so.
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* This needs to happen before the next call to use_free.
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*/
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if (needscan)
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xfs_dir2_data_freescan(args->dp, hdr, needlog);
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}
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/*
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* Add an entry to a block directory.
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*/
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int /* error */
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xfs_dir2_block_addname(
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xfs_da_args_t *args) /* directory op arguments */
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{
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xfs_dir2_data_hdr_t *hdr; /* block header */
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xfs_dir2_leaf_entry_t *blp; /* block leaf entries */
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struct xfs_buf *bp; /* buffer for block */
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xfs_dir2_block_tail_t *btp; /* block tail */
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int compact; /* need to compact leaf ents */
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xfs_dir2_data_entry_t *dep; /* block data entry */
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xfs_inode_t *dp; /* directory inode */
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xfs_dir2_data_unused_t *dup; /* block unused entry */
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int error; /* error return value */
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xfs_dir2_data_unused_t *enddup=NULL; /* unused at end of data */
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xfs_dahash_t hash; /* hash value of found entry */
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int high; /* high index for binary srch */
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int highstale; /* high stale index */
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int lfloghigh=0; /* last final leaf to log */
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int lfloglow=0; /* first final leaf to log */
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int len; /* length of the new entry */
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int low; /* low index for binary srch */
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int lowstale; /* low stale index */
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int mid=0; /* midpoint for binary srch */
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int needlog; /* need to log header */
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int needscan; /* need to rescan freespace */
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__be16 *tagp; /* pointer to tag value */
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xfs_trans_t *tp; /* transaction structure */
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trace_xfs_dir2_block_addname(args);
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dp = args->dp;
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tp = args->trans;
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/* Read the (one and only) directory block into bp. */
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error = xfs_dir3_block_read(tp, dp, &bp);
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if (error)
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return error;
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len = dp->d_ops->data_entsize(args->namelen);
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/*
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* Set up pointers to parts of the block.
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*/
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hdr = bp->b_addr;
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btp = xfs_dir2_block_tail_p(args->geo, hdr);
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blp = xfs_dir2_block_leaf_p(btp);
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/*
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* Find out if we can reuse stale entries or whether we need extra
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* space for entry and new leaf.
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*/
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xfs_dir2_block_need_space(dp, hdr, btp, blp, &tagp, &dup,
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&enddup, &compact, len);
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/*
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* Done everything we need for a space check now.
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*/
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if (args->op_flags & XFS_DA_OP_JUSTCHECK) {
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xfs_trans_brelse(tp, bp);
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if (!dup)
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return -ENOSPC;
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return 0;
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}
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/*
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* If we don't have space for the new entry & leaf ...
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*/
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if (!dup) {
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/* Don't have a space reservation: return no-space. */
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if (args->total == 0)
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return -ENOSPC;
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/*
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* Convert to the next larger format.
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* Then add the new entry in that format.
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*/
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error = xfs_dir2_block_to_leaf(args, bp);
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if (error)
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return error;
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return xfs_dir2_leaf_addname(args);
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}
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needlog = needscan = 0;
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|
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/*
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* If need to compact the leaf entries, do it now.
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*/
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if (compact) {
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xfs_dir2_block_compact(args, bp, hdr, btp, blp, &needlog,
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&lfloghigh, &lfloglow);
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/* recalculate blp post-compaction */
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blp = xfs_dir2_block_leaf_p(btp);
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} else if (btp->stale) {
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/*
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* Set leaf logging boundaries to impossible state.
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* For the no-stale case they're set explicitly.
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*/
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lfloglow = be32_to_cpu(btp->count);
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lfloghigh = -1;
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}
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/*
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* Find the slot that's first lower than our hash value, -1 if none.
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*/
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for (low = 0, high = be32_to_cpu(btp->count) - 1; low <= high; ) {
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mid = (low + high) >> 1;
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if ((hash = be32_to_cpu(blp[mid].hashval)) == args->hashval)
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break;
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if (hash < args->hashval)
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low = mid + 1;
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else
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high = mid - 1;
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}
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while (mid >= 0 && be32_to_cpu(blp[mid].hashval) >= args->hashval) {
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mid--;
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}
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/*
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* No stale entries, will use enddup space to hold new leaf.
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*/
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if (!btp->stale) {
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/*
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* Mark the space needed for the new leaf entry, now in use.
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*/
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|
xfs_dir2_data_use_free(args, bp, enddup,
|
|
(xfs_dir2_data_aoff_t)
|
|
((char *)enddup - (char *)hdr + be16_to_cpu(enddup->length) -
|
|
sizeof(*blp)),
|
|
(xfs_dir2_data_aoff_t)sizeof(*blp),
|
|
&needlog, &needscan);
|
|
/*
|
|
* Update the tail (entry count).
|
|
*/
|
|
be32_add_cpu(&btp->count, 1);
|
|
/*
|
|
* If we now need to rebuild the bestfree map, do so.
|
|
* This needs to happen before the next call to use_free.
|
|
*/
|
|
if (needscan) {
|
|
xfs_dir2_data_freescan(dp, hdr, &needlog);
|
|
needscan = 0;
|
|
}
|
|
/*
|
|
* Adjust pointer to the first leaf entry, we're about to move
|
|
* the table up one to open up space for the new leaf entry.
|
|
* Then adjust our index to match.
|
|
*/
|
|
blp--;
|
|
mid++;
|
|
if (mid)
|
|
memmove(blp, &blp[1], mid * sizeof(*blp));
|
|
lfloglow = 0;
|
|
lfloghigh = mid;
|
|
}
|
|
/*
|
|
* Use a stale leaf for our new entry.
|
|
*/
|
|
else {
|
|
for (lowstale = mid;
|
|
lowstale >= 0 &&
|
|
blp[lowstale].address !=
|
|
cpu_to_be32(XFS_DIR2_NULL_DATAPTR);
|
|
lowstale--)
|
|
continue;
|
|
for (highstale = mid + 1;
|
|
highstale < be32_to_cpu(btp->count) &&
|
|
blp[highstale].address !=
|
|
cpu_to_be32(XFS_DIR2_NULL_DATAPTR) &&
|
|
(lowstale < 0 || mid - lowstale > highstale - mid);
|
|
highstale++)
|
|
continue;
|
|
/*
|
|
* Move entries toward the low-numbered stale entry.
|
|
*/
|
|
if (lowstale >= 0 &&
|
|
(highstale == be32_to_cpu(btp->count) ||
|
|
mid - lowstale <= highstale - mid)) {
|
|
if (mid - lowstale)
|
|
memmove(&blp[lowstale], &blp[lowstale + 1],
|
|
(mid - lowstale) * sizeof(*blp));
|
|
lfloglow = MIN(lowstale, lfloglow);
|
|
lfloghigh = MAX(mid, lfloghigh);
|
|
}
|
|
/*
|
|
* Move entries toward the high-numbered stale entry.
|
|
*/
|
|
else {
|
|
ASSERT(highstale < be32_to_cpu(btp->count));
|
|
mid++;
|
|
if (highstale - mid)
|
|
memmove(&blp[mid + 1], &blp[mid],
|
|
(highstale - mid) * sizeof(*blp));
|
|
lfloglow = MIN(mid, lfloglow);
|
|
lfloghigh = MAX(highstale, lfloghigh);
|
|
}
|
|
be32_add_cpu(&btp->stale, -1);
|
|
}
|
|
/*
|
|
* Point to the new data entry.
|
|
*/
|
|
dep = (xfs_dir2_data_entry_t *)dup;
|
|
/*
|
|
* Fill in the leaf entry.
|
|
*/
|
|
blp[mid].hashval = cpu_to_be32(args->hashval);
|
|
blp[mid].address = cpu_to_be32(xfs_dir2_byte_to_dataptr(
|
|
(char *)dep - (char *)hdr));
|
|
xfs_dir2_block_log_leaf(tp, bp, lfloglow, lfloghigh);
|
|
/*
|
|
* Mark space for the data entry used.
|
|
*/
|
|
xfs_dir2_data_use_free(args, bp, dup,
|
|
(xfs_dir2_data_aoff_t)((char *)dup - (char *)hdr),
|
|
(xfs_dir2_data_aoff_t)len, &needlog, &needscan);
|
|
/*
|
|
* Create the new data entry.
|
|
*/
|
|
dep->inumber = cpu_to_be64(args->inumber);
|
|
dep->namelen = args->namelen;
|
|
memcpy(dep->name, args->name, args->namelen);
|
|
dp->d_ops->data_put_ftype(dep, args->filetype);
|
|
tagp = dp->d_ops->data_entry_tag_p(dep);
|
|
*tagp = cpu_to_be16((char *)dep - (char *)hdr);
|
|
/*
|
|
* Clean up the bestfree array and log the header, tail, and entry.
|
|
*/
|
|
if (needscan)
|
|
xfs_dir2_data_freescan(dp, hdr, &needlog);
|
|
if (needlog)
|
|
xfs_dir2_data_log_header(args, bp);
|
|
xfs_dir2_block_log_tail(tp, bp);
|
|
xfs_dir2_data_log_entry(args, bp, dep);
|
|
xfs_dir3_data_check(dp, bp);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Log leaf entries from the block.
|
|
*/
|
|
static void
|
|
xfs_dir2_block_log_leaf(
|
|
xfs_trans_t *tp, /* transaction structure */
|
|
struct xfs_buf *bp, /* block buffer */
|
|
int first, /* index of first logged leaf */
|
|
int last) /* index of last logged leaf */
|
|
{
|
|
xfs_dir2_data_hdr_t *hdr = bp->b_addr;
|
|
xfs_dir2_leaf_entry_t *blp;
|
|
xfs_dir2_block_tail_t *btp;
|
|
|
|
btp = xfs_dir2_block_tail_p(tp->t_mountp->m_dir_geo, hdr);
|
|
blp = xfs_dir2_block_leaf_p(btp);
|
|
xfs_trans_log_buf(tp, bp, (uint)((char *)&blp[first] - (char *)hdr),
|
|
(uint)((char *)&blp[last + 1] - (char *)hdr - 1));
|
|
}
|
|
|
|
/*
|
|
* Log the block tail.
|
|
*/
|
|
static void
|
|
xfs_dir2_block_log_tail(
|
|
xfs_trans_t *tp, /* transaction structure */
|
|
struct xfs_buf *bp) /* block buffer */
|
|
{
|
|
xfs_dir2_data_hdr_t *hdr = bp->b_addr;
|
|
xfs_dir2_block_tail_t *btp;
|
|
|
|
btp = xfs_dir2_block_tail_p(tp->t_mountp->m_dir_geo, hdr);
|
|
xfs_trans_log_buf(tp, bp, (uint)((char *)btp - (char *)hdr),
|
|
(uint)((char *)(btp + 1) - (char *)hdr - 1));
|
|
}
|
|
|
|
/*
|
|
* Look up an entry in the block. This is the external routine,
|
|
* xfs_dir2_block_lookup_int does the real work.
|
|
*/
|
|
int /* error */
|
|
xfs_dir2_block_lookup(
|
|
xfs_da_args_t *args) /* dir lookup arguments */
|
|
{
|
|
xfs_dir2_data_hdr_t *hdr; /* block header */
|
|
xfs_dir2_leaf_entry_t *blp; /* block leaf entries */
|
|
struct xfs_buf *bp; /* block buffer */
|
|
xfs_dir2_block_tail_t *btp; /* block tail */
|
|
xfs_dir2_data_entry_t *dep; /* block data entry */
|
|
xfs_inode_t *dp; /* incore inode */
|
|
int ent; /* entry index */
|
|
int error; /* error return value */
|
|
|
|
trace_xfs_dir2_block_lookup(args);
|
|
|
|
/*
|
|
* Get the buffer, look up the entry.
|
|
* If not found (ENOENT) then return, have no buffer.
|
|
*/
|
|
if ((error = xfs_dir2_block_lookup_int(args, &bp, &ent)))
|
|
return error;
|
|
dp = args->dp;
|
|
hdr = bp->b_addr;
|
|
xfs_dir3_data_check(dp, bp);
|
|
btp = xfs_dir2_block_tail_p(args->geo, hdr);
|
|
blp = xfs_dir2_block_leaf_p(btp);
|
|
/*
|
|
* Get the offset from the leaf entry, to point to the data.
|
|
*/
|
|
dep = (xfs_dir2_data_entry_t *)((char *)hdr +
|
|
xfs_dir2_dataptr_to_off(args->geo,
|
|
be32_to_cpu(blp[ent].address)));
|
|
/*
|
|
* Fill in inode number, CI name if appropriate, release the block.
|
|
*/
|
|
args->inumber = be64_to_cpu(dep->inumber);
|
|
args->filetype = dp->d_ops->data_get_ftype(dep);
|
|
error = xfs_dir_cilookup_result(args, dep->name, dep->namelen);
|
|
xfs_trans_brelse(args->trans, bp);
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Internal block lookup routine.
|
|
*/
|
|
static int /* error */
|
|
xfs_dir2_block_lookup_int(
|
|
xfs_da_args_t *args, /* dir lookup arguments */
|
|
struct xfs_buf **bpp, /* returned block buffer */
|
|
int *entno) /* returned entry number */
|
|
{
|
|
xfs_dir2_dataptr_t addr; /* data entry address */
|
|
xfs_dir2_data_hdr_t *hdr; /* block header */
|
|
xfs_dir2_leaf_entry_t *blp; /* block leaf entries */
|
|
struct xfs_buf *bp; /* block buffer */
|
|
xfs_dir2_block_tail_t *btp; /* block tail */
|
|
xfs_dir2_data_entry_t *dep; /* block data entry */
|
|
xfs_inode_t *dp; /* incore inode */
|
|
int error; /* error return value */
|
|
xfs_dahash_t hash; /* found hash value */
|
|
int high; /* binary search high index */
|
|
int low; /* binary search low index */
|
|
int mid; /* binary search current idx */
|
|
xfs_mount_t *mp; /* filesystem mount point */
|
|
xfs_trans_t *tp; /* transaction pointer */
|
|
enum xfs_dacmp cmp; /* comparison result */
|
|
|
|
dp = args->dp;
|
|
tp = args->trans;
|
|
mp = dp->i_mount;
|
|
|
|
error = xfs_dir3_block_read(tp, dp, &bp);
|
|
if (error)
|
|
return error;
|
|
|
|
hdr = bp->b_addr;
|
|
xfs_dir3_data_check(dp, bp);
|
|
btp = xfs_dir2_block_tail_p(args->geo, hdr);
|
|
blp = xfs_dir2_block_leaf_p(btp);
|
|
/*
|
|
* Loop doing a binary search for our hash value.
|
|
* Find our entry, ENOENT if it's not there.
|
|
*/
|
|
for (low = 0, high = be32_to_cpu(btp->count) - 1; ; ) {
|
|
ASSERT(low <= high);
|
|
mid = (low + high) >> 1;
|
|
if ((hash = be32_to_cpu(blp[mid].hashval)) == args->hashval)
|
|
break;
|
|
if (hash < args->hashval)
|
|
low = mid + 1;
|
|
else
|
|
high = mid - 1;
|
|
if (low > high) {
|
|
ASSERT(args->op_flags & XFS_DA_OP_OKNOENT);
|
|
xfs_trans_brelse(tp, bp);
|
|
return -ENOENT;
|
|
}
|
|
}
|
|
/*
|
|
* Back up to the first one with the right hash value.
|
|
*/
|
|
while (mid > 0 && be32_to_cpu(blp[mid - 1].hashval) == args->hashval) {
|
|
mid--;
|
|
}
|
|
/*
|
|
* Now loop forward through all the entries with the
|
|
* right hash value looking for our name.
|
|
*/
|
|
do {
|
|
if ((addr = be32_to_cpu(blp[mid].address)) == XFS_DIR2_NULL_DATAPTR)
|
|
continue;
|
|
/*
|
|
* Get pointer to the entry from the leaf.
|
|
*/
|
|
dep = (xfs_dir2_data_entry_t *)
|
|
((char *)hdr + xfs_dir2_dataptr_to_off(args->geo, addr));
|
|
/*
|
|
* Compare name and if it's an exact match, return the index
|
|
* and buffer. If it's the first case-insensitive match, store
|
|
* the index and buffer and continue looking for an exact match.
|
|
*/
|
|
cmp = mp->m_dirnameops->compname(args, dep->name, dep->namelen);
|
|
if (cmp != XFS_CMP_DIFFERENT && cmp != args->cmpresult) {
|
|
args->cmpresult = cmp;
|
|
*bpp = bp;
|
|
*entno = mid;
|
|
if (cmp == XFS_CMP_EXACT)
|
|
return 0;
|
|
}
|
|
} while (++mid < be32_to_cpu(btp->count) &&
|
|
be32_to_cpu(blp[mid].hashval) == hash);
|
|
|
|
ASSERT(args->op_flags & XFS_DA_OP_OKNOENT);
|
|
/*
|
|
* Here, we can only be doing a lookup (not a rename or replace).
|
|
* If a case-insensitive match was found earlier, return success.
|
|
*/
|
|
if (args->cmpresult == XFS_CMP_CASE)
|
|
return 0;
|
|
/*
|
|
* No match, release the buffer and return ENOENT.
|
|
*/
|
|
xfs_trans_brelse(tp, bp);
|
|
return -ENOENT;
|
|
}
|
|
|
|
/*
|
|
* Remove an entry from a block format directory.
|
|
* If that makes the block small enough to fit in shortform, transform it.
|
|
*/
|
|
int /* error */
|
|
xfs_dir2_block_removename(
|
|
xfs_da_args_t *args) /* directory operation args */
|
|
{
|
|
xfs_dir2_data_hdr_t *hdr; /* block header */
|
|
xfs_dir2_leaf_entry_t *blp; /* block leaf pointer */
|
|
struct xfs_buf *bp; /* block buffer */
|
|
xfs_dir2_block_tail_t *btp; /* block tail */
|
|
xfs_dir2_data_entry_t *dep; /* block data entry */
|
|
xfs_inode_t *dp; /* incore inode */
|
|
int ent; /* block leaf entry index */
|
|
int error; /* error return value */
|
|
int needlog; /* need to log block header */
|
|
int needscan; /* need to fixup bestfree */
|
|
xfs_dir2_sf_hdr_t sfh; /* shortform header */
|
|
int size; /* shortform size */
|
|
xfs_trans_t *tp; /* transaction pointer */
|
|
|
|
trace_xfs_dir2_block_removename(args);
|
|
|
|
/*
|
|
* Look up the entry in the block. Gets the buffer and entry index.
|
|
* It will always be there, the vnodeops level does a lookup first.
|
|
*/
|
|
if ((error = xfs_dir2_block_lookup_int(args, &bp, &ent))) {
|
|
return error;
|
|
}
|
|
dp = args->dp;
|
|
tp = args->trans;
|
|
hdr = bp->b_addr;
|
|
btp = xfs_dir2_block_tail_p(args->geo, hdr);
|
|
blp = xfs_dir2_block_leaf_p(btp);
|
|
/*
|
|
* Point to the data entry using the leaf entry.
|
|
*/
|
|
dep = (xfs_dir2_data_entry_t *)((char *)hdr +
|
|
xfs_dir2_dataptr_to_off(args->geo,
|
|
be32_to_cpu(blp[ent].address)));
|
|
/*
|
|
* Mark the data entry's space free.
|
|
*/
|
|
needlog = needscan = 0;
|
|
xfs_dir2_data_make_free(args, bp,
|
|
(xfs_dir2_data_aoff_t)((char *)dep - (char *)hdr),
|
|
dp->d_ops->data_entsize(dep->namelen), &needlog, &needscan);
|
|
/*
|
|
* Fix up the block tail.
|
|
*/
|
|
be32_add_cpu(&btp->stale, 1);
|
|
xfs_dir2_block_log_tail(tp, bp);
|
|
/*
|
|
* Remove the leaf entry by marking it stale.
|
|
*/
|
|
blp[ent].address = cpu_to_be32(XFS_DIR2_NULL_DATAPTR);
|
|
xfs_dir2_block_log_leaf(tp, bp, ent, ent);
|
|
/*
|
|
* Fix up bestfree, log the header if necessary.
|
|
*/
|
|
if (needscan)
|
|
xfs_dir2_data_freescan(dp, hdr, &needlog);
|
|
if (needlog)
|
|
xfs_dir2_data_log_header(args, bp);
|
|
xfs_dir3_data_check(dp, bp);
|
|
/*
|
|
* See if the size as a shortform is good enough.
|
|
*/
|
|
size = xfs_dir2_block_sfsize(dp, hdr, &sfh);
|
|
if (size > XFS_IFORK_DSIZE(dp))
|
|
return 0;
|
|
|
|
/*
|
|
* If it works, do the conversion.
|
|
*/
|
|
return xfs_dir2_block_to_sf(args, bp, size, &sfh);
|
|
}
|
|
|
|
/*
|
|
* Replace an entry in a V2 block directory.
|
|
* Change the inode number to the new value.
|
|
*/
|
|
int /* error */
|
|
xfs_dir2_block_replace(
|
|
xfs_da_args_t *args) /* directory operation args */
|
|
{
|
|
xfs_dir2_data_hdr_t *hdr; /* block header */
|
|
xfs_dir2_leaf_entry_t *blp; /* block leaf entries */
|
|
struct xfs_buf *bp; /* block buffer */
|
|
xfs_dir2_block_tail_t *btp; /* block tail */
|
|
xfs_dir2_data_entry_t *dep; /* block data entry */
|
|
xfs_inode_t *dp; /* incore inode */
|
|
int ent; /* leaf entry index */
|
|
int error; /* error return value */
|
|
|
|
trace_xfs_dir2_block_replace(args);
|
|
|
|
/*
|
|
* Lookup the entry in the directory. Get buffer and entry index.
|
|
* This will always succeed since the caller has already done a lookup.
|
|
*/
|
|
if ((error = xfs_dir2_block_lookup_int(args, &bp, &ent))) {
|
|
return error;
|
|
}
|
|
dp = args->dp;
|
|
hdr = bp->b_addr;
|
|
btp = xfs_dir2_block_tail_p(args->geo, hdr);
|
|
blp = xfs_dir2_block_leaf_p(btp);
|
|
/*
|
|
* Point to the data entry we need to change.
|
|
*/
|
|
dep = (xfs_dir2_data_entry_t *)((char *)hdr +
|
|
xfs_dir2_dataptr_to_off(args->geo,
|
|
be32_to_cpu(blp[ent].address)));
|
|
ASSERT(be64_to_cpu(dep->inumber) != args->inumber);
|
|
/*
|
|
* Change the inode number to the new value.
|
|
*/
|
|
dep->inumber = cpu_to_be64(args->inumber);
|
|
dp->d_ops->data_put_ftype(dep, args->filetype);
|
|
xfs_dir2_data_log_entry(args, bp, dep);
|
|
xfs_dir3_data_check(dp, bp);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Qsort comparison routine for the block leaf entries.
|
|
*/
|
|
static int /* sort order */
|
|
xfs_dir2_block_sort(
|
|
const void *a, /* first leaf entry */
|
|
const void *b) /* second leaf entry */
|
|
{
|
|
const xfs_dir2_leaf_entry_t *la; /* first leaf entry */
|
|
const xfs_dir2_leaf_entry_t *lb; /* second leaf entry */
|
|
|
|
la = a;
|
|
lb = b;
|
|
return be32_to_cpu(la->hashval) < be32_to_cpu(lb->hashval) ? -1 :
|
|
(be32_to_cpu(la->hashval) > be32_to_cpu(lb->hashval) ? 1 : 0);
|
|
}
|
|
|
|
/*
|
|
* Convert a V2 leaf directory to a V2 block directory if possible.
|
|
*/
|
|
int /* error */
|
|
xfs_dir2_leaf_to_block(
|
|
xfs_da_args_t *args, /* operation arguments */
|
|
struct xfs_buf *lbp, /* leaf buffer */
|
|
struct xfs_buf *dbp) /* data buffer */
|
|
{
|
|
__be16 *bestsp; /* leaf bests table */
|
|
xfs_dir2_data_hdr_t *hdr; /* block header */
|
|
xfs_dir2_block_tail_t *btp; /* block tail */
|
|
xfs_inode_t *dp; /* incore directory inode */
|
|
xfs_dir2_data_unused_t *dup; /* unused data entry */
|
|
int error; /* error return value */
|
|
int from; /* leaf from index */
|
|
xfs_dir2_leaf_t *leaf; /* leaf structure */
|
|
xfs_dir2_leaf_entry_t *lep; /* leaf entry */
|
|
xfs_dir2_leaf_tail_t *ltp; /* leaf tail structure */
|
|
xfs_mount_t *mp; /* file system mount point */
|
|
int needlog; /* need to log data header */
|
|
int needscan; /* need to scan for bestfree */
|
|
xfs_dir2_sf_hdr_t sfh; /* shortform header */
|
|
int size; /* bytes used */
|
|
__be16 *tagp; /* end of entry (tag) */
|
|
int to; /* block/leaf to index */
|
|
xfs_trans_t *tp; /* transaction pointer */
|
|
struct xfs_dir2_leaf_entry *ents;
|
|
struct xfs_dir3_icleaf_hdr leafhdr;
|
|
|
|
trace_xfs_dir2_leaf_to_block(args);
|
|
|
|
dp = args->dp;
|
|
tp = args->trans;
|
|
mp = dp->i_mount;
|
|
leaf = lbp->b_addr;
|
|
dp->d_ops->leaf_hdr_from_disk(&leafhdr, leaf);
|
|
ents = dp->d_ops->leaf_ents_p(leaf);
|
|
ltp = xfs_dir2_leaf_tail_p(args->geo, leaf);
|
|
|
|
ASSERT(leafhdr.magic == XFS_DIR2_LEAF1_MAGIC ||
|
|
leafhdr.magic == XFS_DIR3_LEAF1_MAGIC);
|
|
/*
|
|
* If there are data blocks other than the first one, take this
|
|
* opportunity to remove trailing empty data blocks that may have
|
|
* been left behind during no-space-reservation operations.
|
|
* These will show up in the leaf bests table.
|
|
*/
|
|
while (dp->i_d.di_size > args->geo->blksize) {
|
|
int hdrsz;
|
|
|
|
hdrsz = dp->d_ops->data_entry_offset;
|
|
bestsp = xfs_dir2_leaf_bests_p(ltp);
|
|
if (be16_to_cpu(bestsp[be32_to_cpu(ltp->bestcount) - 1]) ==
|
|
args->geo->blksize - hdrsz) {
|
|
if ((error =
|
|
xfs_dir2_leaf_trim_data(args, lbp,
|
|
(xfs_dir2_db_t)(be32_to_cpu(ltp->bestcount) - 1))))
|
|
return error;
|
|
} else
|
|
return 0;
|
|
}
|
|
/*
|
|
* Read the data block if we don't already have it, give up if it fails.
|
|
*/
|
|
if (!dbp) {
|
|
error = xfs_dir3_data_read(tp, dp, args->geo->datablk, -1, &dbp);
|
|
if (error)
|
|
return error;
|
|
}
|
|
hdr = dbp->b_addr;
|
|
ASSERT(hdr->magic == cpu_to_be32(XFS_DIR2_DATA_MAGIC) ||
|
|
hdr->magic == cpu_to_be32(XFS_DIR3_DATA_MAGIC));
|
|
|
|
/*
|
|
* Size of the "leaf" area in the block.
|
|
*/
|
|
size = (uint)sizeof(xfs_dir2_block_tail_t) +
|
|
(uint)sizeof(*lep) * (leafhdr.count - leafhdr.stale);
|
|
/*
|
|
* Look at the last data entry.
|
|
*/
|
|
tagp = (__be16 *)((char *)hdr + args->geo->blksize) - 1;
|
|
dup = (xfs_dir2_data_unused_t *)((char *)hdr + be16_to_cpu(*tagp));
|
|
/*
|
|
* If it's not free or is too short we can't do it.
|
|
*/
|
|
if (be16_to_cpu(dup->freetag) != XFS_DIR2_DATA_FREE_TAG ||
|
|
be16_to_cpu(dup->length) < size)
|
|
return 0;
|
|
|
|
/*
|
|
* Start converting it to block form.
|
|
*/
|
|
xfs_dir3_block_init(mp, tp, dbp, dp);
|
|
|
|
needlog = 1;
|
|
needscan = 0;
|
|
/*
|
|
* Use up the space at the end of the block (blp/btp).
|
|
*/
|
|
xfs_dir2_data_use_free(args, dbp, dup, args->geo->blksize - size, size,
|
|
&needlog, &needscan);
|
|
/*
|
|
* Initialize the block tail.
|
|
*/
|
|
btp = xfs_dir2_block_tail_p(args->geo, hdr);
|
|
btp->count = cpu_to_be32(leafhdr.count - leafhdr.stale);
|
|
btp->stale = 0;
|
|
xfs_dir2_block_log_tail(tp, dbp);
|
|
/*
|
|
* Initialize the block leaf area. We compact out stale entries.
|
|
*/
|
|
lep = xfs_dir2_block_leaf_p(btp);
|
|
for (from = to = 0; from < leafhdr.count; from++) {
|
|
if (ents[from].address == cpu_to_be32(XFS_DIR2_NULL_DATAPTR))
|
|
continue;
|
|
lep[to++] = ents[from];
|
|
}
|
|
ASSERT(to == be32_to_cpu(btp->count));
|
|
xfs_dir2_block_log_leaf(tp, dbp, 0, be32_to_cpu(btp->count) - 1);
|
|
/*
|
|
* Scan the bestfree if we need it and log the data block header.
|
|
*/
|
|
if (needscan)
|
|
xfs_dir2_data_freescan(dp, hdr, &needlog);
|
|
if (needlog)
|
|
xfs_dir2_data_log_header(args, dbp);
|
|
/*
|
|
* Pitch the old leaf block.
|
|
*/
|
|
error = xfs_da_shrink_inode(args, args->geo->leafblk, lbp);
|
|
if (error)
|
|
return error;
|
|
|
|
/*
|
|
* Now see if the resulting block can be shrunken to shortform.
|
|
*/
|
|
size = xfs_dir2_block_sfsize(dp, hdr, &sfh);
|
|
if (size > XFS_IFORK_DSIZE(dp))
|
|
return 0;
|
|
|
|
return xfs_dir2_block_to_sf(args, dbp, size, &sfh);
|
|
}
|
|
|
|
/*
|
|
* Convert the shortform directory to block form.
|
|
*/
|
|
int /* error */
|
|
xfs_dir2_sf_to_block(
|
|
xfs_da_args_t *args) /* operation arguments */
|
|
{
|
|
xfs_dir2_db_t blkno; /* dir-relative block # (0) */
|
|
xfs_dir2_data_hdr_t *hdr; /* block header */
|
|
xfs_dir2_leaf_entry_t *blp; /* block leaf entries */
|
|
struct xfs_buf *bp; /* block buffer */
|
|
xfs_dir2_block_tail_t *btp; /* block tail pointer */
|
|
xfs_dir2_data_entry_t *dep; /* data entry pointer */
|
|
xfs_inode_t *dp; /* incore directory inode */
|
|
int dummy; /* trash */
|
|
xfs_dir2_data_unused_t *dup; /* unused entry pointer */
|
|
int endoffset; /* end of data objects */
|
|
int error; /* error return value */
|
|
int i; /* index */
|
|
xfs_mount_t *mp; /* filesystem mount point */
|
|
int needlog; /* need to log block header */
|
|
int needscan; /* need to scan block freespc */
|
|
int newoffset; /* offset from current entry */
|
|
int offset; /* target block offset */
|
|
xfs_dir2_sf_entry_t *sfep; /* sf entry pointer */
|
|
xfs_dir2_sf_hdr_t *oldsfp; /* old shortform header */
|
|
xfs_dir2_sf_hdr_t *sfp; /* shortform header */
|
|
__be16 *tagp; /* end of data entry */
|
|
xfs_trans_t *tp; /* transaction pointer */
|
|
struct xfs_name name;
|
|
struct xfs_ifork *ifp;
|
|
|
|
trace_xfs_dir2_sf_to_block(args);
|
|
|
|
dp = args->dp;
|
|
tp = args->trans;
|
|
mp = dp->i_mount;
|
|
ifp = XFS_IFORK_PTR(dp, XFS_DATA_FORK);
|
|
ASSERT(ifp->if_flags & XFS_IFINLINE);
|
|
/*
|
|
* Bomb out if the shortform directory is way too short.
|
|
*/
|
|
if (dp->i_d.di_size < offsetof(xfs_dir2_sf_hdr_t, parent)) {
|
|
ASSERT(XFS_FORCED_SHUTDOWN(mp));
|
|
return -EIO;
|
|
}
|
|
|
|
oldsfp = (xfs_dir2_sf_hdr_t *)ifp->if_u1.if_data;
|
|
|
|
ASSERT(ifp->if_bytes == dp->i_d.di_size);
|
|
ASSERT(ifp->if_u1.if_data != NULL);
|
|
ASSERT(dp->i_d.di_size >= xfs_dir2_sf_hdr_size(oldsfp->i8count));
|
|
ASSERT(dp->i_d.di_nextents == 0);
|
|
|
|
/*
|
|
* Copy the directory into a temporary buffer.
|
|
* Then pitch the incore inode data so we can make extents.
|
|
*/
|
|
sfp = kmem_alloc(ifp->if_bytes, KM_SLEEP);
|
|
memcpy(sfp, oldsfp, ifp->if_bytes);
|
|
|
|
xfs_idata_realloc(dp, -ifp->if_bytes, XFS_DATA_FORK);
|
|
xfs_bmap_local_to_extents_empty(dp, XFS_DATA_FORK);
|
|
dp->i_d.di_size = 0;
|
|
|
|
/*
|
|
* Add block 0 to the inode.
|
|
*/
|
|
error = xfs_dir2_grow_inode(args, XFS_DIR2_DATA_SPACE, &blkno);
|
|
if (error) {
|
|
kmem_free(sfp);
|
|
return error;
|
|
}
|
|
/*
|
|
* Initialize the data block, then convert it to block format.
|
|
*/
|
|
error = xfs_dir3_data_init(args, blkno, &bp);
|
|
if (error) {
|
|
kmem_free(sfp);
|
|
return error;
|
|
}
|
|
xfs_dir3_block_init(mp, tp, bp, dp);
|
|
hdr = bp->b_addr;
|
|
|
|
/*
|
|
* Compute size of block "tail" area.
|
|
*/
|
|
i = (uint)sizeof(*btp) +
|
|
(sfp->count + 2) * (uint)sizeof(xfs_dir2_leaf_entry_t);
|
|
/*
|
|
* The whole thing is initialized to free by the init routine.
|
|
* Say we're using the leaf and tail area.
|
|
*/
|
|
dup = dp->d_ops->data_unused_p(hdr);
|
|
needlog = needscan = 0;
|
|
xfs_dir2_data_use_free(args, bp, dup, args->geo->blksize - i,
|
|
i, &needlog, &needscan);
|
|
ASSERT(needscan == 0);
|
|
/*
|
|
* Fill in the tail.
|
|
*/
|
|
btp = xfs_dir2_block_tail_p(args->geo, hdr);
|
|
btp->count = cpu_to_be32(sfp->count + 2); /* ., .. */
|
|
btp->stale = 0;
|
|
blp = xfs_dir2_block_leaf_p(btp);
|
|
endoffset = (uint)((char *)blp - (char *)hdr);
|
|
/*
|
|
* Remove the freespace, we'll manage it.
|
|
*/
|
|
xfs_dir2_data_use_free(args, bp, dup,
|
|
(xfs_dir2_data_aoff_t)((char *)dup - (char *)hdr),
|
|
be16_to_cpu(dup->length), &needlog, &needscan);
|
|
/*
|
|
* Create entry for .
|
|
*/
|
|
dep = dp->d_ops->data_dot_entry_p(hdr);
|
|
dep->inumber = cpu_to_be64(dp->i_ino);
|
|
dep->namelen = 1;
|
|
dep->name[0] = '.';
|
|
dp->d_ops->data_put_ftype(dep, XFS_DIR3_FT_DIR);
|
|
tagp = dp->d_ops->data_entry_tag_p(dep);
|
|
*tagp = cpu_to_be16((char *)dep - (char *)hdr);
|
|
xfs_dir2_data_log_entry(args, bp, dep);
|
|
blp[0].hashval = cpu_to_be32(xfs_dir_hash_dot);
|
|
blp[0].address = cpu_to_be32(xfs_dir2_byte_to_dataptr(
|
|
(char *)dep - (char *)hdr));
|
|
/*
|
|
* Create entry for ..
|
|
*/
|
|
dep = dp->d_ops->data_dotdot_entry_p(hdr);
|
|
dep->inumber = cpu_to_be64(dp->d_ops->sf_get_parent_ino(sfp));
|
|
dep->namelen = 2;
|
|
dep->name[0] = dep->name[1] = '.';
|
|
dp->d_ops->data_put_ftype(dep, XFS_DIR3_FT_DIR);
|
|
tagp = dp->d_ops->data_entry_tag_p(dep);
|
|
*tagp = cpu_to_be16((char *)dep - (char *)hdr);
|
|
xfs_dir2_data_log_entry(args, bp, dep);
|
|
blp[1].hashval = cpu_to_be32(xfs_dir_hash_dotdot);
|
|
blp[1].address = cpu_to_be32(xfs_dir2_byte_to_dataptr(
|
|
(char *)dep - (char *)hdr));
|
|
offset = dp->d_ops->data_first_offset;
|
|
/*
|
|
* Loop over existing entries, stuff them in.
|
|
*/
|
|
i = 0;
|
|
if (!sfp->count)
|
|
sfep = NULL;
|
|
else
|
|
sfep = xfs_dir2_sf_firstentry(sfp);
|
|
/*
|
|
* Need to preserve the existing offset values in the sf directory.
|
|
* Insert holes (unused entries) where necessary.
|
|
*/
|
|
while (offset < endoffset) {
|
|
/*
|
|
* sfep is null when we reach the end of the list.
|
|
*/
|
|
if (sfep == NULL)
|
|
newoffset = endoffset;
|
|
else
|
|
newoffset = xfs_dir2_sf_get_offset(sfep);
|
|
/*
|
|
* There should be a hole here, make one.
|
|
*/
|
|
if (offset < newoffset) {
|
|
dup = (xfs_dir2_data_unused_t *)((char *)hdr + offset);
|
|
dup->freetag = cpu_to_be16(XFS_DIR2_DATA_FREE_TAG);
|
|
dup->length = cpu_to_be16(newoffset - offset);
|
|
*xfs_dir2_data_unused_tag_p(dup) = cpu_to_be16(
|
|
((char *)dup - (char *)hdr));
|
|
xfs_dir2_data_log_unused(args, bp, dup);
|
|
xfs_dir2_data_freeinsert(hdr,
|
|
dp->d_ops->data_bestfree_p(hdr),
|
|
dup, &dummy);
|
|
offset += be16_to_cpu(dup->length);
|
|
continue;
|
|
}
|
|
/*
|
|
* Copy a real entry.
|
|
*/
|
|
dep = (xfs_dir2_data_entry_t *)((char *)hdr + newoffset);
|
|
dep->inumber = cpu_to_be64(dp->d_ops->sf_get_ino(sfp, sfep));
|
|
dep->namelen = sfep->namelen;
|
|
dp->d_ops->data_put_ftype(dep, dp->d_ops->sf_get_ftype(sfep));
|
|
memcpy(dep->name, sfep->name, dep->namelen);
|
|
tagp = dp->d_ops->data_entry_tag_p(dep);
|
|
*tagp = cpu_to_be16((char *)dep - (char *)hdr);
|
|
xfs_dir2_data_log_entry(args, bp, dep);
|
|
name.name = sfep->name;
|
|
name.len = sfep->namelen;
|
|
blp[2 + i].hashval = cpu_to_be32(mp->m_dirnameops->
|
|
hashname(&name));
|
|
blp[2 + i].address = cpu_to_be32(xfs_dir2_byte_to_dataptr(
|
|
(char *)dep - (char *)hdr));
|
|
offset = (int)((char *)(tagp + 1) - (char *)hdr);
|
|
if (++i == sfp->count)
|
|
sfep = NULL;
|
|
else
|
|
sfep = dp->d_ops->sf_nextentry(sfp, sfep);
|
|
}
|
|
/* Done with the temporary buffer */
|
|
kmem_free(sfp);
|
|
/*
|
|
* Sort the leaf entries by hash value.
|
|
*/
|
|
xfs_sort(blp, be32_to_cpu(btp->count), sizeof(*blp), xfs_dir2_block_sort);
|
|
/*
|
|
* Log the leaf entry area and tail.
|
|
* Already logged the header in data_init, ignore needlog.
|
|
*/
|
|
ASSERT(needscan == 0);
|
|
xfs_dir2_block_log_leaf(tp, bp, 0, be32_to_cpu(btp->count) - 1);
|
|
xfs_dir2_block_log_tail(tp, bp);
|
|
xfs_dir3_data_check(dp, bp);
|
|
return 0;
|
|
}
|