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GFS2: Combine transaction from gfs2_dir_exhash_dealloc 

At the end of function gfs2_dir_exhash_dealloc, it was setting the dinode
type to "file" to prevent directory corruption in case of a crash.
It was doing so in its own journal transaction.  This patch makes the
change occur when the last call is make to leaf_dealloc, since it needs
to rewrite the directory dinode at that time anyway.

Signed-off-by: Bob Peterson <rpeterso@redhat.com>
Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
This commit is contained in:
Bob Peterson 2011-03-22 13:54:03 -04:00 committed by Steven Whitehouse
parent 0d95326d9b
commit d24a7a439a
1 changed files with 14 additions and 35 deletions
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49
fs/gfs2/dir.c
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@ -86,7 +86,7 @@ typedef int (*gfs2_dscan_t)(const struct gfs2_dirent *dent,
const struct qstr *name, void *opaque);
static int leaf_dealloc(struct gfs2_inode *dip, u32 index, u32 len,
u64 leaf_no);
u64 leaf_no, int last_dealloc);
int gfs2_dir_get_new_buffer(struct gfs2_inode *ip, u64 block,
struct buffer_head **bhp)
@ -1781,10 +1781,10 @@ static int foreach_leaf(struct gfs2_inode *dip)
struct gfs2_leaf *leaf;
u32 hsize, len;
u32 ht_offset, lp_offset, ht_offset_cur = -1;
u32 index = 0;
u32 index = 0, next_index;
__be64 *lp;
u64 leaf_no;
int error = 0;
int error = 0, last;
hsize = 1 << dip->i_depth;
if (hsize * sizeof(u64) != i_size_read(&dip->i_inode)) {
@ -1819,13 +1819,13 @@ static int foreach_leaf(struct gfs2_inode *dip)
goto out;
leaf = (struct gfs2_leaf *)bh->b_data;
len = 1 << (dip->i_depth - be16_to_cpu(leaf->lf_depth));
next_index = (index & ~(len - 1)) + len;
last = ((next_index >= hsize) ? 1 : 0);
brelse(bh);
error = leaf_dealloc(dip, index, len, leaf_no);
error = leaf_dealloc(dip, index, len, leaf_no, last);
if (error)
goto out;
index = (index & ~(len - 1)) + len;
index = next_index;
} else
index++;
}
@ -1847,13 +1847,13 @@ out:
* @index: the hash table offset in the directory
* @len: the number of pointers to this leaf
* @leaf_no: the leaf number
* @data: not used
* last_dealloc: 1 if this is the final dealloc for the leaf, else 0
*
* Returns: errno
*/
static int leaf_dealloc(struct gfs2_inode *dip, u32 index, u32 len,
u64 leaf_no)
u64 leaf_no, int last_dealloc)
{
struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
struct gfs2_leaf *tmp_leaf;
@ -1940,6 +1940,10 @@ static int leaf_dealloc(struct gfs2_inode *dip, u32 index, u32 len,
goto out_end_trans;
gfs2_trans_add_bh(dip->i_gl, dibh, 1);
/* On the last dealloc, make this a regular file in case we crash.
(We don't want to free these blocks a second time.) */
if (last_dealloc)
dip->i_inode.i_mode = S_IFREG;
gfs2_dinode_out(dip, dibh->b_data);
brelse(dibh);
@ -1971,33 +1975,8 @@ out:
int gfs2_dir_exhash_dealloc(struct gfs2_inode *dip)
{
struct gfs2_sbd *sdp = GFS2_SB(&dip->i_inode);
struct buffer_head *bh;
int error;
/* Dealloc on-disk leaves to FREEMETA state */
error = foreach_leaf(dip);
if (error)
return error;
/* Make this a regular file in case we crash.
(We don't want to free these blocks a second time.) */
error = gfs2_trans_begin(sdp, RES_DINODE, 0);
if (error)
return error;
error = gfs2_meta_inode_buffer(dip, &bh);
if (!error) {
gfs2_trans_add_bh(dip->i_gl, bh, 1);
((struct gfs2_dinode *)bh->b_data)->di_mode =
cpu_to_be32(S_IFREG);
brelse(bh);
}
gfs2_trans_end(sdp);
return error;
return foreach_leaf(dip);
}
/**