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ocfs2: Rename ocfs2_cp_xattr_cluster() to ocfs2_mv_xattr_buckets(). 

ocfs2_cp_xattr_cluster() takes the last cluster of an xattr extent,
copies its buckets to the front of a new extent, and then shrinks the bucket
count of the original extent.  So it's really moving the data, not
copying it.

While we're here, the function doesn't need a buffer_head for the old
extent, just the block number.

Signed-off-by: Joel Becker <joel.becker@oracle.com>
Signed-off-by: Mark Fasheh <mfasheh@suse.com>
This commit is contained in:
Joel Becker 2008-11-26 13:02:18 -08:00 committed by Mark Fasheh
parent b5c03e7469
commit 874d65af1c
1 changed files with 22 additions and 20 deletions
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42
fs/ocfs2/xattr.c
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@ -3965,11 +3965,12 @@ static int ocfs2_cp_xattr_bucket(struct inode *inode,
/*
* Hey, if we're overwriting t_bucket, what difference does
* ACCESS_CREATE vs ACCESS_WRITE make? Well, if we allocated a new
* cluster to fill, we came here from ocfs2_cp_xattr_cluster(), and
* it is really new - ACCESS_CREATE is required. But we also
* might have moved data out of t_bucket before extending back
* into it. ocfs2_add_new_xattr_bucket() can do this - its call
* to ocfs2_add_new_xattr_cluster() may have created a new extent
* cluster to fill, we came here from
* ocfs2_mv_xattr_buckets(), and it is really new -
* ACCESS_CREATE is required. But we also might have moved data
* out of t_bucket before extending back into it.
* ocfs2_add_new_xattr_bucket() can do this - its call to
* ocfs2_add_new_xattr_cluster() may have created a new extent
* and copied out the end of the old extent. Then it re-extends
* the old extent back to create space for new xattrs. That's
* how we get here, and the bucket isn't really new.
@ -3992,17 +3993,16 @@ out:
}
/*
* src_blk points to the last cluster of an existing extent. to_blk
* points to a newly allocated extent. We copy the cluster over to the
* new extent, initializing its xh_num_buckets. The old extent's
* xh_num_buckets shrinks by the same amount.
* src_blk points to the start of an existing extent. last_blk points to
* last cluster in that extent. to_blk points to a newly allocated
* extent. We copy the buckets from cluster at last_blk to the new extent,
* initializing its xh_num_buckets. The old extent's xh_num_buckets
* shrinks by the same amount.
*/
static int ocfs2_cp_xattr_cluster(struct inode *inode,
static int ocfs2_mv_xattr_buckets(struct inode *inode,
handle_t *handle,
struct buffer_head *first_bh,
u64 src_blk,
u64 to_blk,
u32 *first_hash)
u64 src_blk, u64 last_blk,
u64 to_blk, u32 *first_hash)
{
int i, ret, credits;
struct ocfs2_super *osb = OCFS2_SB(inode->i_sb);
@ -4011,8 +4011,8 @@ static int ocfs2_cp_xattr_cluster(struct inode *inode,
int num_buckets = ocfs2_xattr_buckets_per_cluster(osb);
struct ocfs2_xattr_bucket *old_first, *new_first;
mlog(0, "cp xattrs from cluster %llu to %llu\n",
(unsigned long long)src_blk, (unsigned long long)to_blk);
mlog(0, "mv xattrs from cluster %llu to %llu\n",
(unsigned long long)last_blk, (unsigned long long)to_blk);
/* The first bucket of the original extent */
old_first = ocfs2_xattr_bucket_new(inode);
@ -4024,7 +4024,7 @@ static int ocfs2_cp_xattr_cluster(struct inode *inode,
goto out;
}
ret = ocfs2_read_xattr_bucket(old_first, first_bh->b_blocknr);
ret = ocfs2_read_xattr_bucket(old_first, src_blk);
if (ret) {
mlog_errno(ret);
goto out;
@ -4050,7 +4050,7 @@ static int ocfs2_cp_xattr_cluster(struct inode *inode,
for (i = 0; i < num_buckets; i++) {
ret = ocfs2_cp_xattr_bucket(inode, handle,
src_blk + (i * blks_per_bucket),
last_blk + (i * blks_per_bucket),
to_blk + (i * blks_per_bucket),
1);
if (ret) {
@ -4175,8 +4175,10 @@ static int ocfs2_adjust_xattr_cross_cluster(struct inode *inode,
u64 last_blk = prev_blk + bpc * (prev_clusters - 1);
if (prev_clusters > 1 && (*header_bh)->b_blocknr != last_blk)
ret = ocfs2_cp_xattr_cluster(inode, handle, *first_bh,
last_blk, new_blk,
ret = ocfs2_mv_xattr_buckets(inode, handle,
(*first_bh)->b_blocknr,
last_blk,
new_blk,
v_start);
else {
ret = ocfs2_divide_xattr_cluster(inode, handle,