![Dave Chinner](/assets/img/avatar_default.png)
Add a header to the remote symlink block, containing location and owner information, as well as CRCs and LSN fields. This requires verifiers to be added to the remote symlink buffers for CRC enabled filesystems. This also fixes a bug reading multiple block symlinks, where the second block overwrites the first block when copying out the link name. Signed-off-by: Dave Chinner <dchinner@redhat.com> Reviewed-by: Ben Myers <bpm@sgi.com> Signed-off-by: Ben Myers <bpm@sgi.com>
731 lines
17 KiB
C
731 lines
17 KiB
C
/*
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* Copyright (c) 2000-2006 Silicon Graphics, Inc.
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* Copyright (c) 2012-2013 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_types.h"
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#include "xfs_bit.h"
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#include "xfs_log.h"
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#include "xfs_trans.h"
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#include "xfs_sb.h"
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#include "xfs_ag.h"
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#include "xfs_dir2.h"
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#include "xfs_mount.h"
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#include "xfs_da_btree.h"
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#include "xfs_bmap_btree.h"
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#include "xfs_ialloc_btree.h"
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#include "xfs_dinode.h"
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#include "xfs_inode.h"
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#include "xfs_inode_item.h"
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#include "xfs_itable.h"
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#include "xfs_ialloc.h"
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#include "xfs_alloc.h"
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#include "xfs_bmap.h"
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#include "xfs_error.h"
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#include "xfs_quota.h"
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#include "xfs_utils.h"
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#include "xfs_trans_space.h"
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#include "xfs_log_priv.h"
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#include "xfs_trace.h"
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#include "xfs_symlink.h"
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#include "xfs_cksum.h"
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#include "xfs_buf_item.h"
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/*
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* Each contiguous block has a header, so it is not just a simple pathlen
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* to FSB conversion.
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*/
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int
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xfs_symlink_blocks(
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struct xfs_mount *mp,
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int pathlen)
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{
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int fsblocks = 0;
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int len = pathlen;
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do {
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fsblocks++;
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len -= XFS_SYMLINK_BUF_SPACE(mp, mp->m_sb.sb_blocksize);
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} while (len > 0);
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ASSERT(fsblocks <= XFS_SYMLINK_MAPS);
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return fsblocks;
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}
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static int
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xfs_symlink_hdr_set(
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struct xfs_mount *mp,
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xfs_ino_t ino,
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uint32_t offset,
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uint32_t size,
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struct xfs_buf *bp)
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{
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struct xfs_dsymlink_hdr *dsl = bp->b_addr;
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if (!xfs_sb_version_hascrc(&mp->m_sb))
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return 0;
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dsl->sl_magic = cpu_to_be32(XFS_SYMLINK_MAGIC);
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dsl->sl_offset = cpu_to_be32(offset);
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dsl->sl_bytes = cpu_to_be32(size);
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uuid_copy(&dsl->sl_uuid, &mp->m_sb.sb_uuid);
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dsl->sl_owner = cpu_to_be64(ino);
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dsl->sl_blkno = cpu_to_be64(bp->b_bn);
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bp->b_ops = &xfs_symlink_buf_ops;
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return sizeof(struct xfs_dsymlink_hdr);
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}
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/*
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* Checking of the symlink header is split into two parts. the verifier does
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* CRC, location and bounds checking, the unpacking function checks the path
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* parameters and owner.
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*/
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bool
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xfs_symlink_hdr_ok(
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struct xfs_mount *mp,
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xfs_ino_t ino,
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uint32_t offset,
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uint32_t size,
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struct xfs_buf *bp)
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{
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struct xfs_dsymlink_hdr *dsl = bp->b_addr;
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if (offset != be32_to_cpu(dsl->sl_offset))
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return false;
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if (size != be32_to_cpu(dsl->sl_bytes))
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return false;
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if (ino != be64_to_cpu(dsl->sl_owner))
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return false;
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/* ok */
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return true;
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}
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static bool
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xfs_symlink_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_dsymlink_hdr *dsl = bp->b_addr;
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if (!xfs_sb_version_hascrc(&mp->m_sb))
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return false;
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if (dsl->sl_magic != cpu_to_be32(XFS_SYMLINK_MAGIC))
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return false;
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if (!uuid_equal(&dsl->sl_uuid, &mp->m_sb.sb_uuid))
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return false;
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if (bp->b_bn != be64_to_cpu(dsl->sl_blkno))
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return false;
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if (be32_to_cpu(dsl->sl_offset) +
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be32_to_cpu(dsl->sl_bytes) >= MAXPATHLEN)
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return false;
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if (dsl->sl_owner == 0)
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return false;
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return true;
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}
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static void
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xfs_symlink_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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/* no verification of non-crc buffers */
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if (!xfs_sb_version_hascrc(&mp->m_sb))
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return;
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if (!xfs_verify_cksum(bp->b_addr, BBTOB(bp->b_length),
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offsetof(struct xfs_dsymlink_hdr, sl_crc)) ||
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!xfs_symlink_verify(bp)) {
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XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr);
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xfs_buf_ioerror(bp, EFSCORRUPTED);
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}
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}
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static void
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xfs_symlink_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_fspriv;
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/* no verification of non-crc buffers */
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if (!xfs_sb_version_hascrc(&mp->m_sb))
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return;
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if (!xfs_symlink_verify(bp)) {
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XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp, bp->b_addr);
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xfs_buf_ioerror(bp, EFSCORRUPTED);
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return;
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}
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if (bip) {
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struct xfs_dsymlink_hdr *dsl = bp->b_addr;
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dsl->sl_lsn = cpu_to_be64(bip->bli_item.li_lsn);
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}
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xfs_update_cksum(bp->b_addr, BBTOB(bp->b_length),
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offsetof(struct xfs_dsymlink_hdr, sl_crc));
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}
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const struct xfs_buf_ops xfs_symlink_buf_ops = {
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.verify_read = xfs_symlink_read_verify,
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.verify_write = xfs_symlink_write_verify,
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};
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void
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xfs_symlink_local_to_remote(
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struct xfs_trans *tp,
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struct xfs_buf *bp,
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struct xfs_inode *ip,
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struct xfs_ifork *ifp)
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{
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struct xfs_mount *mp = ip->i_mount;
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char *buf;
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if (!xfs_sb_version_hascrc(&mp->m_sb)) {
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bp->b_ops = NULL;
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memcpy(bp->b_addr, ifp->if_u1.if_data, ifp->if_bytes);
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return;
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}
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/*
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* As this symlink fits in an inode literal area, it must also fit in
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* the smallest buffer the filesystem supports.
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*/
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ASSERT(BBTOB(bp->b_length) >=
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ifp->if_bytes + sizeof(struct xfs_dsymlink_hdr));
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bp->b_ops = &xfs_symlink_buf_ops;
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buf = bp->b_addr;
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buf += xfs_symlink_hdr_set(mp, ip->i_ino, 0, ifp->if_bytes, bp);
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memcpy(buf, ifp->if_u1.if_data, ifp->if_bytes);
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}
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/* ----- Kernel only functions below ----- */
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STATIC int
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xfs_readlink_bmap(
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struct xfs_inode *ip,
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char *link)
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{
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struct xfs_mount *mp = ip->i_mount;
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struct xfs_bmbt_irec mval[XFS_SYMLINK_MAPS];
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struct xfs_buf *bp;
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xfs_daddr_t d;
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char *cur_chunk;
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int pathlen = ip->i_d.di_size;
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int nmaps = XFS_SYMLINK_MAPS;
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int byte_cnt;
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int n;
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int error = 0;
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int fsblocks = 0;
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int offset;
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fsblocks = xfs_symlink_blocks(mp, pathlen);
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error = xfs_bmapi_read(ip, 0, fsblocks, mval, &nmaps, 0);
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if (error)
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goto out;
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offset = 0;
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for (n = 0; n < nmaps; n++) {
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d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock);
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byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount);
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bp = xfs_buf_read(mp->m_ddev_targp, d, BTOBB(byte_cnt), 0,
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&xfs_symlink_buf_ops);
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if (!bp)
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return XFS_ERROR(ENOMEM);
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error = bp->b_error;
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if (error) {
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xfs_buf_ioerror_alert(bp, __func__);
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xfs_buf_relse(bp);
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goto out;
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}
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byte_cnt = XFS_SYMLINK_BUF_SPACE(mp, byte_cnt);
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if (pathlen < byte_cnt)
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byte_cnt = pathlen;
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cur_chunk = bp->b_addr;
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if (xfs_sb_version_hascrc(&mp->m_sb)) {
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if (!xfs_symlink_hdr_ok(mp, ip->i_ino, offset,
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byte_cnt, bp)) {
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error = EFSCORRUPTED;
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xfs_alert(mp,
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"symlink header does not match required off/len/owner (0x%x/Ox%x,0x%llx)",
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offset, byte_cnt, ip->i_ino);
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xfs_buf_relse(bp);
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goto out;
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}
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cur_chunk += sizeof(struct xfs_dsymlink_hdr);
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}
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memcpy(link + offset, bp->b_addr, byte_cnt);
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pathlen -= byte_cnt;
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offset += byte_cnt;
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xfs_buf_relse(bp);
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}
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ASSERT(pathlen == 0);
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link[ip->i_d.di_size] = '\0';
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error = 0;
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out:
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return error;
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}
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int
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xfs_readlink(
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struct xfs_inode *ip,
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char *link)
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{
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struct xfs_mount *mp = ip->i_mount;
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xfs_fsize_t pathlen;
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int error = 0;
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trace_xfs_readlink(ip);
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if (XFS_FORCED_SHUTDOWN(mp))
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return XFS_ERROR(EIO);
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xfs_ilock(ip, XFS_ILOCK_SHARED);
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pathlen = ip->i_d.di_size;
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if (!pathlen)
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goto out;
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if (pathlen < 0 || pathlen > MAXPATHLEN) {
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xfs_alert(mp, "%s: inode (%llu) bad symlink length (%lld)",
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__func__, (unsigned long long) ip->i_ino,
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(long long) pathlen);
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ASSERT(0);
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error = XFS_ERROR(EFSCORRUPTED);
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goto out;
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}
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if (ip->i_df.if_flags & XFS_IFINLINE) {
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memcpy(link, ip->i_df.if_u1.if_data, pathlen);
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link[pathlen] = '\0';
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} else {
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error = xfs_readlink_bmap(ip, link);
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}
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out:
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xfs_iunlock(ip, XFS_ILOCK_SHARED);
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return error;
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}
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int
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xfs_symlink(
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struct xfs_inode *dp,
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struct xfs_name *link_name,
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const char *target_path,
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umode_t mode,
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struct xfs_inode **ipp)
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{
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struct xfs_mount *mp = dp->i_mount;
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struct xfs_trans *tp = NULL;
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struct xfs_inode *ip = NULL;
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int error = 0;
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int pathlen;
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struct xfs_bmap_free free_list;
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xfs_fsblock_t first_block;
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bool unlock_dp_on_error = false;
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uint cancel_flags;
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int committed;
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xfs_fileoff_t first_fsb;
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xfs_filblks_t fs_blocks;
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int nmaps;
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struct xfs_bmbt_irec mval[XFS_SYMLINK_MAPS];
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xfs_daddr_t d;
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const char *cur_chunk;
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int byte_cnt;
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int n;
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xfs_buf_t *bp;
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prid_t prid;
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struct xfs_dquot *udqp, *gdqp;
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uint resblks;
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*ipp = NULL;
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trace_xfs_symlink(dp, link_name);
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if (XFS_FORCED_SHUTDOWN(mp))
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return XFS_ERROR(EIO);
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/*
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* Check component lengths of the target path name.
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*/
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pathlen = strlen(target_path);
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if (pathlen >= MAXPATHLEN) /* total string too long */
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return XFS_ERROR(ENAMETOOLONG);
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udqp = gdqp = NULL;
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if (dp->i_d.di_flags & XFS_DIFLAG_PROJINHERIT)
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prid = xfs_get_projid(dp);
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else
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prid = XFS_PROJID_DEFAULT;
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/*
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* Make sure that we have allocated dquot(s) on disk.
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*/
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error = xfs_qm_vop_dqalloc(dp, current_fsuid(), current_fsgid(), prid,
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XFS_QMOPT_QUOTALL | XFS_QMOPT_INHERIT, &udqp, &gdqp);
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if (error)
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goto std_return;
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tp = xfs_trans_alloc(mp, XFS_TRANS_SYMLINK);
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cancel_flags = XFS_TRANS_RELEASE_LOG_RES;
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/*
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* The symlink will fit into the inode data fork?
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* There can't be any attributes so we get the whole variable part.
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*/
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if (pathlen <= XFS_LITINO(mp, dp->i_d.di_version))
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fs_blocks = 0;
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else
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fs_blocks = XFS_B_TO_FSB(mp, pathlen);
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resblks = XFS_SYMLINK_SPACE_RES(mp, link_name->len, fs_blocks);
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error = xfs_trans_reserve(tp, resblks, XFS_SYMLINK_LOG_RES(mp), 0,
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XFS_TRANS_PERM_LOG_RES, XFS_SYMLINK_LOG_COUNT);
|
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if (error == ENOSPC && fs_blocks == 0) {
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resblks = 0;
|
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error = xfs_trans_reserve(tp, 0, XFS_SYMLINK_LOG_RES(mp), 0,
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XFS_TRANS_PERM_LOG_RES, XFS_SYMLINK_LOG_COUNT);
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}
|
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if (error) {
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cancel_flags = 0;
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goto error_return;
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}
|
|
|
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xfs_ilock(dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT);
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unlock_dp_on_error = true;
|
|
|
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/*
|
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* Check whether the directory allows new symlinks or not.
|
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*/
|
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if (dp->i_d.di_flags & XFS_DIFLAG_NOSYMLINKS) {
|
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error = XFS_ERROR(EPERM);
|
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goto error_return;
|
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}
|
|
|
|
/*
|
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* Reserve disk quota : blocks and inode.
|
|
*/
|
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error = xfs_trans_reserve_quota(tp, mp, udqp, gdqp, resblks, 1, 0);
|
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if (error)
|
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goto error_return;
|
|
|
|
/*
|
|
* Check for ability to enter directory entry, if no space reserved.
|
|
*/
|
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error = xfs_dir_canenter(tp, dp, link_name, resblks);
|
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if (error)
|
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goto error_return;
|
|
/*
|
|
* Initialize the bmap freelist prior to calling either
|
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* bmapi or the directory create code.
|
|
*/
|
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xfs_bmap_init(&free_list, &first_block);
|
|
|
|
/*
|
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* Allocate an inode for the symlink.
|
|
*/
|
|
error = xfs_dir_ialloc(&tp, dp, S_IFLNK | (mode & ~S_IFMT), 1, 0,
|
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prid, resblks > 0, &ip, NULL);
|
|
if (error) {
|
|
if (error == ENOSPC)
|
|
goto error_return;
|
|
goto error1;
|
|
}
|
|
|
|
/*
|
|
* An error after we've joined dp to the transaction will result in the
|
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* transaction cancel unlocking dp so don't do it explicitly in the
|
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* error path.
|
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*/
|
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xfs_trans_ijoin(tp, dp, XFS_ILOCK_EXCL);
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unlock_dp_on_error = false;
|
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|
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/*
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* Also attach the dquot(s) to it, if applicable.
|
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*/
|
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xfs_qm_vop_create_dqattach(tp, ip, udqp, gdqp);
|
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|
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if (resblks)
|
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resblks -= XFS_IALLOC_SPACE_RES(mp);
|
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/*
|
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* If the symlink will fit into the inode, write it inline.
|
|
*/
|
|
if (pathlen <= XFS_IFORK_DSIZE(ip)) {
|
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xfs_idata_realloc(ip, pathlen, XFS_DATA_FORK);
|
|
memcpy(ip->i_df.if_u1.if_data, target_path, pathlen);
|
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ip->i_d.di_size = pathlen;
|
|
|
|
/*
|
|
* The inode was initially created in extent format.
|
|
*/
|
|
ip->i_df.if_flags &= ~(XFS_IFEXTENTS | XFS_IFBROOT);
|
|
ip->i_df.if_flags |= XFS_IFINLINE;
|
|
|
|
ip->i_d.di_format = XFS_DINODE_FMT_LOCAL;
|
|
xfs_trans_log_inode(tp, ip, XFS_ILOG_DDATA | XFS_ILOG_CORE);
|
|
|
|
} else {
|
|
int offset;
|
|
|
|
first_fsb = 0;
|
|
nmaps = XFS_SYMLINK_MAPS;
|
|
|
|
error = xfs_bmapi_write(tp, ip, first_fsb, fs_blocks,
|
|
XFS_BMAPI_METADATA, &first_block, resblks,
|
|
mval, &nmaps, &free_list);
|
|
if (error)
|
|
goto error2;
|
|
|
|
if (resblks)
|
|
resblks -= fs_blocks;
|
|
ip->i_d.di_size = pathlen;
|
|
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
|
|
|
|
cur_chunk = target_path;
|
|
offset = 0;
|
|
for (n = 0; n < nmaps; n++) {
|
|
char *buf;
|
|
|
|
d = XFS_FSB_TO_DADDR(mp, mval[n].br_startblock);
|
|
byte_cnt = XFS_FSB_TO_B(mp, mval[n].br_blockcount);
|
|
bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, d,
|
|
BTOBB(byte_cnt), 0);
|
|
if (!bp) {
|
|
error = ENOMEM;
|
|
goto error2;
|
|
}
|
|
bp->b_ops = &xfs_symlink_buf_ops;
|
|
|
|
byte_cnt = XFS_SYMLINK_BUF_SPACE(mp, byte_cnt);
|
|
if (pathlen < byte_cnt) {
|
|
byte_cnt = pathlen;
|
|
}
|
|
|
|
buf = bp->b_addr;
|
|
buf += xfs_symlink_hdr_set(mp, ip->i_ino, offset,
|
|
byte_cnt, bp);
|
|
|
|
memcpy(buf, cur_chunk, byte_cnt);
|
|
|
|
cur_chunk += byte_cnt;
|
|
pathlen -= byte_cnt;
|
|
offset += byte_cnt;
|
|
|
|
xfs_trans_log_buf(tp, bp, 0, (buf + byte_cnt - 1) -
|
|
(char *)bp->b_addr);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Create the directory entry for the symlink.
|
|
*/
|
|
error = xfs_dir_createname(tp, dp, link_name, ip->i_ino,
|
|
&first_block, &free_list, resblks);
|
|
if (error)
|
|
goto error2;
|
|
xfs_trans_ichgtime(tp, dp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
|
|
xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE);
|
|
|
|
/*
|
|
* If this is a synchronous mount, make sure that the
|
|
* symlink 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) {
|
|
goto error2;
|
|
}
|
|
error = xfs_trans_commit(tp, XFS_TRANS_RELEASE_LOG_RES);
|
|
xfs_qm_dqrele(udqp);
|
|
xfs_qm_dqrele(gdqp);
|
|
|
|
*ipp = ip;
|
|
return 0;
|
|
|
|
error2:
|
|
IRELE(ip);
|
|
error1:
|
|
xfs_bmap_cancel(&free_list);
|
|
cancel_flags |= XFS_TRANS_ABORT;
|
|
error_return:
|
|
xfs_trans_cancel(tp, cancel_flags);
|
|
xfs_qm_dqrele(udqp);
|
|
xfs_qm_dqrele(gdqp);
|
|
|
|
if (unlock_dp_on_error)
|
|
xfs_iunlock(dp, XFS_ILOCK_EXCL);
|
|
std_return:
|
|
return error;
|
|
}
|
|
|
|
/*
|
|
* Free a symlink that has blocks associated with it.
|
|
*/
|
|
int
|
|
xfs_inactive_symlink_rmt(
|
|
xfs_inode_t *ip,
|
|
xfs_trans_t **tpp)
|
|
{
|
|
xfs_buf_t *bp;
|
|
int committed;
|
|
int done;
|
|
int error;
|
|
xfs_fsblock_t first_block;
|
|
xfs_bmap_free_t free_list;
|
|
int i;
|
|
xfs_mount_t *mp;
|
|
xfs_bmbt_irec_t mval[XFS_SYMLINK_MAPS];
|
|
int nmaps;
|
|
xfs_trans_t *ntp;
|
|
int size;
|
|
xfs_trans_t *tp;
|
|
|
|
tp = *tpp;
|
|
mp = ip->i_mount;
|
|
ASSERT(ip->i_d.di_size > XFS_IFORK_DSIZE(ip));
|
|
/*
|
|
* We're freeing a symlink that has some
|
|
* blocks allocated to it. Free the
|
|
* blocks here. We know that we've got
|
|
* either 1 or 2 extents and that we can
|
|
* free them all in one bunmapi call.
|
|
*/
|
|
ASSERT(ip->i_d.di_nextents > 0 && ip->i_d.di_nextents <= 2);
|
|
|
|
/*
|
|
* Lock the inode, fix the size, and join it to the transaction.
|
|
* Hold it so in the normal path, we still have it locked for
|
|
* the second transaction. In the error paths we need it
|
|
* held so the cancel won't rele it, see below.
|
|
*/
|
|
size = (int)ip->i_d.di_size;
|
|
ip->i_d.di_size = 0;
|
|
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
|
|
/*
|
|
* Find the block(s) so we can inval and unmap them.
|
|
*/
|
|
done = 0;
|
|
xfs_bmap_init(&free_list, &first_block);
|
|
nmaps = ARRAY_SIZE(mval);
|
|
error = xfs_bmapi_read(ip, 0, xfs_symlink_blocks(mp, size),
|
|
mval, &nmaps, 0);
|
|
if (error)
|
|
goto error0;
|
|
/*
|
|
* Invalidate the block(s). No validation is done.
|
|
*/
|
|
for (i = 0; i < nmaps; i++) {
|
|
bp = xfs_trans_get_buf(tp, mp->m_ddev_targp,
|
|
XFS_FSB_TO_DADDR(mp, mval[i].br_startblock),
|
|
XFS_FSB_TO_BB(mp, mval[i].br_blockcount), 0);
|
|
if (!bp) {
|
|
error = ENOMEM;
|
|
goto error1;
|
|
}
|
|
xfs_trans_binval(tp, bp);
|
|
}
|
|
/*
|
|
* Unmap the dead block(s) to the free_list.
|
|
*/
|
|
if ((error = xfs_bunmapi(tp, ip, 0, size, XFS_BMAPI_METADATA, nmaps,
|
|
&first_block, &free_list, &done)))
|
|
goto error1;
|
|
ASSERT(done);
|
|
/*
|
|
* Commit the first transaction. This logs the EFI and the inode.
|
|
*/
|
|
if ((error = xfs_bmap_finish(&tp, &free_list, &committed)))
|
|
goto error1;
|
|
/*
|
|
* The transaction must have been committed, since there were
|
|
* actually extents freed by xfs_bunmapi. See xfs_bmap_finish.
|
|
* The new tp has the extent freeing and EFDs.
|
|
*/
|
|
ASSERT(committed);
|
|
/*
|
|
* The first xact was committed, so add the inode to the new one.
|
|
* Mark it dirty so it will be logged and moved forward in the log as
|
|
* part of every commit.
|
|
*/
|
|
xfs_trans_ijoin(tp, ip, 0);
|
|
xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
|
|
/*
|
|
* Get a new, empty transaction to return to our caller.
|
|
*/
|
|
ntp = xfs_trans_dup(tp);
|
|
/*
|
|
* Commit the transaction containing extent freeing and EFDs.
|
|
* If we get an error on the commit here or on the reserve below,
|
|
* we need to unlock the inode since the new transaction doesn't
|
|
* have the inode attached.
|
|
*/
|
|
error = xfs_trans_commit(tp, 0);
|
|
tp = ntp;
|
|
if (error) {
|
|
ASSERT(XFS_FORCED_SHUTDOWN(mp));
|
|
goto error0;
|
|
}
|
|
/*
|
|
* transaction commit worked ok so we can drop the extra ticket
|
|
* reference that we gained in xfs_trans_dup()
|
|
*/
|
|
xfs_log_ticket_put(tp->t_ticket);
|
|
|
|
/*
|
|
* Remove the memory for extent descriptions (just bookkeeping).
|
|
*/
|
|
if (ip->i_df.if_bytes)
|
|
xfs_idata_realloc(ip, -ip->i_df.if_bytes, XFS_DATA_FORK);
|
|
ASSERT(ip->i_df.if_bytes == 0);
|
|
/*
|
|
* Put an itruncate log reservation in the new transaction
|
|
* for our caller.
|
|
*/
|
|
if ((error = xfs_trans_reserve(tp, 0, XFS_ITRUNCATE_LOG_RES(mp), 0,
|
|
XFS_TRANS_PERM_LOG_RES, XFS_ITRUNCATE_LOG_COUNT))) {
|
|
ASSERT(XFS_FORCED_SHUTDOWN(mp));
|
|
goto error0;
|
|
}
|
|
|
|
xfs_trans_ijoin(tp, ip, 0);
|
|
*tpp = tp;
|
|
return 0;
|
|
|
|
error1:
|
|
xfs_bmap_cancel(&free_list);
|
|
error0:
|
|
return error;
|
|
}
|