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-rw-r--r--fs/gfs2/bmap.c48
1 files changed, 21 insertions, 27 deletions
diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c
index e27e66046f0..f1f38ca77a5 100644
--- a/fs/gfs2/bmap.c
+++ b/fs/gfs2/bmap.c
@@ -188,50 +188,45 @@ static int build_height(struct inode *inode, struct metapath *mp, unsigned heigh
{
struct gfs2_inode *ip = GFS2_I(inode);
unsigned new_height = height - ip->i_height;
- struct buffer_head *dibh;
+ struct buffer_head *dibh = mp->mp_bh[0];
struct gfs2_dinode *di;
- int error;
__be64 *bp;
u64 bn;
unsigned n, i = 0;
- if (height <= ip->i_height)
- return 0;
-
- error = gfs2_meta_inode_buffer(ip, &dibh);
- if (error)
- return error;
+ BUG_ON(height <= ip->i_height);
do {
n = new_height - i;
bn = gfs2_alloc_block(ip, &n);
gfs2_trans_add_unrevoke(GFS2_SB(inode), bn, n);
do {
- mp->mp_bh[i] = gfs2_meta_new(ip->i_gl, bn++);
- gfs2_trans_add_bh(ip->i_gl, mp->mp_bh[i], 1);
+ mp->mp_bh[i + 1] = gfs2_meta_new(ip->i_gl, bn++);
+ gfs2_trans_add_bh(ip->i_gl, mp->mp_bh[i + 1], 1);
i++;
} while(i < n);
} while(i < new_height);
n = 0;
- bn = mp->mp_bh[0]->b_blocknr;
+ bn = mp->mp_bh[1]->b_blocknr;
if (new_height > 1) {
for(; n < new_height-1; n++) {
- gfs2_metatype_set(mp->mp_bh[n], GFS2_METATYPE_IN,
+ gfs2_metatype_set(mp->mp_bh[n + 1], GFS2_METATYPE_IN,
GFS2_FORMAT_IN);
- gfs2_buffer_clear_tail(mp->mp_bh[n],
+ gfs2_buffer_clear_tail(mp->mp_bh[n + 1],
sizeof(struct gfs2_meta_header));
- bp = (__be64 *)(mp->mp_bh[n]->b_data +
+ bp = (__be64 *)(mp->mp_bh[n + 1]->b_data +
sizeof(struct gfs2_meta_header));
- *bp = cpu_to_be64(mp->mp_bh[n+1]->b_blocknr);
- brelse(mp->mp_bh[n]);
- mp->mp_bh[n] = NULL;
+ *bp = cpu_to_be64(mp->mp_bh[n+2]->b_blocknr);
+ brelse(mp->mp_bh[n+1]);
+ mp->mp_bh[n+1] = NULL;
}
}
- gfs2_metatype_set(mp->mp_bh[n], GFS2_METATYPE_IN, GFS2_FORMAT_IN);
- gfs2_buffer_copy_tail(mp->mp_bh[n], sizeof(struct gfs2_meta_header),
+ gfs2_metatype_set(mp->mp_bh[n+1], GFS2_METATYPE_IN, GFS2_FORMAT_IN);
+ gfs2_buffer_copy_tail(mp->mp_bh[n+1], sizeof(struct gfs2_meta_header),
dibh, sizeof(struct gfs2_dinode));
- brelse(mp->mp_bh[n]);
+ brelse(mp->mp_bh[n+1]);
+ mp->mp_bh[n+1] = NULL;
gfs2_trans_add_bh(ip->i_gl, dibh, 1);
di = (struct gfs2_dinode *)dibh->b_data;
gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode));
@@ -240,8 +235,7 @@ static int build_height(struct inode *inode, struct metapath *mp, unsigned heigh
gfs2_add_inode_blocks(&ip->i_inode, new_height);
di->di_height = cpu_to_be16(ip->i_height);
di->di_blocks = cpu_to_be64(gfs2_get_inode_blocks(&ip->i_inode));
- brelse(dibh);
- return error;
+ return 0;
}
/**
@@ -391,11 +385,7 @@ static int lookup_metapath(struct inode *inode, struct metapath *mp,
struct gfs2_inode *ip = GFS2_I(inode);
unsigned int end_of_metadata = ip->i_height - 1;
unsigned int x;
- int ret = gfs2_meta_inode_buffer(ip, &bh);
- if (ret)
- return ret;
-
- mp->mp_bh[0] = bh;
+ int ret;
for (x = 0; x < end_of_metadata; x++) {
lookup_block(ip, x, mp, create, new, dblock);
@@ -515,6 +505,10 @@ int gfs2_block_map(struct inode *inode, sector_t lblock,
}
size = (lblock + 1) * bsize;
+ error = gfs2_meta_inode_buffer(ip, &mp.mp_bh[0]);
+ if (error)
+ goto out_fail;
+
if (size > arr[ip->i_height]) {
u8 height = ip->i_height;
if (!create)