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[PATCH] JFS: Don't allocate extents that overlap existing extents

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Modify xtSearch so that it returns the next allocated block when the
requested block is unmapped.  This can be used to make sure we don't
create a new extent that overlaps the next one.

Signed-off-by: Dave Kleikamp <shaggy@austin.ibm.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Dave Kleikamp
2005-05-02 12:25:13 -06:00
committed by Linus Torvalds
parent 1c6278295d
commit 6628465e33
3 changed files with 46 additions and 25 deletions
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6
fs/jfs/inode.c
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@@ -178,7 +178,7 @@ jfs_get_blocks(struct inode *ip, sector_t lblock, unsigned long max_blocks,
xad_t xad;
s64 xaddr;
int xflag;
s32 xlen;
s32 xlen = max_blocks;
/*
* Take appropriate lock on inode
@@ -190,7 +190,7 @@ jfs_get_blocks(struct inode *ip, sector_t lblock, unsigned long max_blocks,
if (((lblock64 << ip->i_sb->s_blocksize_bits) < ip->i_size) &&
(!xtLookup(ip, lblock64, max_blocks, &xflag, &xaddr, &xlen, 0)) &&
xlen) {
xaddr) {
if (xflag & XAD_NOTRECORDED) {
if (!create)
/*
@@ -229,7 +229,7 @@ jfs_get_blocks(struct inode *ip, sector_t lblock, unsigned long max_blocks,
#ifdef _JFS_4K
if ((rc = extHint(ip, lblock64 << ip->i_sb->s_blocksize_bits, &xad)))
goto unlock;
rc = extAlloc(ip, max_blocks, lblock64, &xad, FALSE);
rc = extAlloc(ip, xlen, lblock64, &xad, FALSE);
if (rc)
goto unlock;