diff options
Diffstat (limited to 'fs/gfs2/bmap.c')
| -rw-r--r-- | fs/gfs2/bmap.c | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c index 5e411d5f4697..4a48c0f4b402 100644 --- a/fs/gfs2/bmap.c +++ b/fs/gfs2/bmap.c @@ -71,11 +71,13 @@ static int gfs2_unstuffer_page(struct gfs2_inode *ip, struct buffer_head *dibh, if (!PageUptodate(page)) { void *kaddr = kmap(page); + u64 dsize = i_size_read(inode); + + if (dsize > (dibh->b_size - sizeof(struct gfs2_dinode))) + dsize = dibh->b_size - sizeof(struct gfs2_dinode); - memcpy(kaddr, dibh->b_data + sizeof(struct gfs2_dinode), - ip->i_disksize); - memset(kaddr + ip->i_disksize, 0, - PAGE_CACHE_SIZE - ip->i_disksize); + memcpy(kaddr, dibh->b_data + sizeof(struct gfs2_dinode), dsize); + memset(kaddr + dsize, 0, PAGE_CACHE_SIZE - dsize); kunmap(page); SetPageUptodate(page); @@ -1038,13 +1040,14 @@ static int trunc_start(struct gfs2_inode *ip, u64 size) goto out; if (gfs2_is_stuffed(ip)) { - ip->i_disksize = size; + u64 dsize = size + sizeof(struct gfs2_inode); ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME; gfs2_trans_add_bh(ip->i_gl, dibh, 1); gfs2_dinode_out(ip, dibh->b_data); - gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode) + size); + if (dsize > dibh->b_size) + dsize = dibh->b_size; + gfs2_buffer_clear_tail(dibh, dsize); error = 1; - } else { if (size & (u64)(sdp->sd_sb.sb_bsize - 1)) error = gfs2_block_truncate_page(ip->i_inode.i_mapping); |