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xfs: merge xfs_bmap_read_extents into xfs_iread_extents

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xfs_iread_extents is just a trivial wrapper, there is no good reason
to keep the two separate.

[darrick: minor fixups having left xfs_bmbt_validate_extent intact]

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Christoph Hellwig 2017-10-23 16:32:39 -07:00 committed by Darrick J. Wong
parent 9ad1a23afb
commit 211e95bbab
3 changed files with 51 additions and 75 deletions
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87
fs/xfs/libxfs/xfs_bmap.c
View file

@ -1164,33 +1164,37 @@ trans_cancel:
*/
/*
* Read in the extents to if_extents.
* All inode fields are set up by caller, we just traverse the btree
* and copy the records in. If the file system cannot contain unwritten
* extents, the records are checked for no "state" flags.
* Read in extents from a btree-format inode.
*/
int /* error */
xfs_bmap_read_extents(
xfs_trans_t *tp, /* transaction pointer */
xfs_inode_t *ip, /* incore inode */
int whichfork) /* data or attr fork */
int
xfs_iread_extents(
struct xfs_trans *tp,
struct xfs_inode *ip,
int whichfork)
{
struct xfs_btree_block *block; /* current btree block */
xfs_fsblock_t bno; /* block # of "block" */
xfs_buf_t *bp; /* buffer for "block" */
int error; /* error return value */
xfs_extnum_t i, j; /* index into the extents list */
xfs_ifork_t *ifp; /* fork structure */
int level; /* btree level, for checking */
xfs_mount_t *mp; /* file system mount structure */
__be64 *pp; /* pointer to block address */
/* REFERENCED */
xfs_extnum_t room; /* number of entries there's room for */
struct xfs_mount *mp = ip->i_mount;
int state = xfs_bmap_fork_to_state(whichfork);
struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork);
xfs_extnum_t nextents = XFS_IFORK_NEXTENTS(ip, whichfork);
struct xfs_btree_block *block = ifp->if_broot;
xfs_fsblock_t bno;
struct xfs_buf *bp;
xfs_extnum_t i, j;
int level;
__be64 *pp;
int error;
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
if (unlikely(XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE)) {
XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_LOW, mp);
return -EFSCORRUPTED;
}
ifp->if_bytes = 0;
ifp->if_real_bytes = 0;
xfs_iext_add(ifp, 0, nextents);
mp = ip->i_mount;
ifp = XFS_IFORK_PTR(ip, whichfork);
block = ifp->if_broot;
/*
* Root level must use BMAP_BROOT_PTR_ADDR macro to get ptr out.
*/
@ -1207,21 +1211,22 @@ xfs_bmap_read_extents(
error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp,
XFS_BMAP_BTREE_REF, &xfs_bmbt_buf_ops);
if (error)
return error;
goto out;
block = XFS_BUF_TO_BLOCK(bp);
if (level == 0)
break;
pp = XFS_BMBT_PTR_ADDR(mp, block, 1, mp->m_bmap_dmxr[1]);
bno = be64_to_cpu(*pp);
XFS_WANT_CORRUPTED_GOTO(mp,
XFS_FSB_SANITY_CHECK(mp, bno), error0);
XFS_FSB_SANITY_CHECK(mp, bno), out_brelse);
xfs_trans_brelse(tp, bp);
}
/*
* Here with bp and block set to the leftmost leaf node in the tree.
*/
room = xfs_iext_count(ifp);
i = 0;
/*
* Loop over all leaf nodes. Copy information to the extent records.
*/
@ -1231,14 +1236,15 @@ xfs_bmap_read_extents(
xfs_extnum_t num_recs;
num_recs = xfs_btree_get_numrecs(block);
if (unlikely(i + num_recs > room)) {
ASSERT(i + num_recs <= room);
if (unlikely(i + num_recs > nextents)) {
ASSERT(i + num_recs <= nextents);
xfs_warn(ip->i_mount,
"corrupt dinode %Lu, (btree extents).",
(unsigned long long) ip->i_ino);
XFS_CORRUPTION_ERROR("xfs_bmap_read_extents(1)",
XFS_CORRUPTION_ERROR(__func__,
XFS_ERRLEVEL_LOW, ip->i_mount, block);
goto error0;
error = -EFSCORRUPTED;
goto out_brelse;
}
/*
* Read-ahead the next leaf block, if any.
@ -1258,7 +1264,8 @@ xfs_bmap_read_extents(
if (!xfs_bmbt_validate_extent(mp, whichfork, trp)) {
XFS_ERROR_REPORT("xfs_bmap_read_extents(2)",
XFS_ERRLEVEL_LOW, mp);
goto error0;
error = -EFSCORRUPTED;
goto out_brelse;
}
trace_xfs_read_extent(ip, i, state, _THIS_IP_);
}
@ -1272,16 +1279,24 @@ xfs_bmap_read_extents(
error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp,
XFS_BMAP_BTREE_REF, &xfs_bmbt_buf_ops);
if (error)
return error;
goto out;
block = XFS_BUF_TO_BLOCK(bp);
}
if (i != XFS_IFORK_NEXTENTS(ip, whichfork))
return -EFSCORRUPTED;
if (i != XFS_IFORK_NEXTENTS(ip, whichfork)) {
error = -EFSCORRUPTED;
goto out;
}
ASSERT(i == xfs_iext_count(ifp));
ifp->if_flags |= XFS_IFEXTENTS;
return 0;
error0:
out_brelse:
xfs_trans_brelse(tp, bp);
return -EFSCORRUPTED;
out:
xfs_iext_destroy(ifp);
return error;
}
/*

2
fs/xfs/libxfs/xfs_bmap.h
View file

@ -199,8 +199,6 @@ int xfs_bmap_last_before(struct xfs_trans *tp, struct xfs_inode *ip,
int xfs_bmap_last_offset(struct xfs_inode *ip, xfs_fileoff_t *unused,
int whichfork);
int xfs_bmap_one_block(struct xfs_inode *ip, int whichfork);
int xfs_bmap_read_extents(struct xfs_trans *tp, struct xfs_inode *ip,
int whichfork);
int xfs_bmapi_read(struct xfs_inode *ip, xfs_fileoff_t bno,
xfs_filblks_t len, struct xfs_bmbt_irec *mval,
int *nmap, int flags);

37
fs/xfs/libxfs/xfs_inode_fork.c
View file

@ -448,43 +448,6 @@ xfs_iformat_btree(
return 0;
}
/*
* Read in extents from a btree-format inode.
* Allocate and fill in if_extents. Real work is done in xfs_bmap.c.
*/
int
xfs_iread_extents(
xfs_trans_t *tp,
xfs_inode_t *ip,
int whichfork)
{
int error;
xfs_ifork_t *ifp;
xfs_extnum_t nextents;
ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
if (unlikely(XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE)) {
XFS_ERROR_REPORT("xfs_iread_extents", XFS_ERRLEVEL_LOW,
ip->i_mount);
return -EFSCORRUPTED;
}
nextents = XFS_IFORK_NEXTENTS(ip, whichfork);
ifp = XFS_IFORK_PTR(ip, whichfork);
/*
* We know that the size is valid (it's checked in iformat_btree)
*/
ifp->if_bytes = ifp->if_real_bytes = 0;
xfs_iext_add(ifp, 0, nextents);
error = xfs_bmap_read_extents(tp, ip, whichfork);
if (error) {
xfs_iext_destroy(ifp);
return error;
}
ifp->if_flags |= XFS_IFEXTENTS;
return 0;
}
/*
* Reallocate the space for if_broot based on the number of records
* being added or deleted as indicated in rec_diff. Move the records