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Diffstat (limited to 'fs/gfs2/bmap.c')
-rw-r--r--fs/gfs2/bmap.c17
1 files changed, 10 insertions, 7 deletions
diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c
index 583e823307ae..0db0cd92a38d 100644
--- a/fs/gfs2/bmap.c
+++ b/fs/gfs2/bmap.c
@@ -72,11 +72,13 @@ static int gfs2_unstuffer_page(struct gfs2_inode *ip, struct buffer_head *dibh,
72 72
73 if (!PageUptodate(page)) { 73 if (!PageUptodate(page)) {
74 void *kaddr = kmap(page); 74 void *kaddr = kmap(page);
75 u64 dsize = i_size_read(inode);
76
77 if (dsize > (dibh->b_size - sizeof(struct gfs2_dinode)))
78 dsize = dibh->b_size - sizeof(struct gfs2_dinode);
75 79
76 memcpy(kaddr, dibh->b_data + sizeof(struct gfs2_dinode), 80 memcpy(kaddr, dibh->b_data + sizeof(struct gfs2_dinode), dsize);
77 ip->i_disksize); 81 memset(kaddr + dsize, 0, PAGE_CACHE_SIZE - dsize);
78 memset(kaddr + ip->i_disksize, 0,
79 PAGE_CACHE_SIZE - ip->i_disksize);
80 kunmap(page); 82 kunmap(page);
81 83
82 SetPageUptodate(page); 84 SetPageUptodate(page);
@@ -1039,13 +1041,14 @@ static int trunc_start(struct gfs2_inode *ip, u64 size)
1039 goto out; 1041 goto out;
1040 1042
1041 if (gfs2_is_stuffed(ip)) { 1043 if (gfs2_is_stuffed(ip)) {
1042 ip->i_disksize = size; 1044 u64 dsize = size + sizeof(struct gfs2_inode);
1043 ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME; 1045 ip->i_inode.i_mtime = ip->i_inode.i_ctime = CURRENT_TIME;
1044 gfs2_trans_add_bh(ip->i_gl, dibh, 1); 1046 gfs2_trans_add_bh(ip->i_gl, dibh, 1);
1045 gfs2_dinode_out(ip, dibh->b_data); 1047 gfs2_dinode_out(ip, dibh->b_data);
1046 gfs2_buffer_clear_tail(dibh, sizeof(struct gfs2_dinode) + size); 1048 if (dsize > dibh->b_size)
1049 dsize = dibh->b_size;
1050 gfs2_buffer_clear_tail(dibh, dsize);
1047 error = 1; 1051 error = 1;
1048
1049 } else { 1052 } else {
1050 if (size & (u64)(sdp->sd_sb.sb_bsize - 1)) 1053 if (size & (u64)(sdp->sd_sb.sb_bsize - 1))
1051 error = gfs2_block_truncate_page(ip->i_inode.i_mapping); 1054 error = gfs2_block_truncate_page(ip->i_inode.i_mapping);