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Diffstat (limited to 'fs/ufs/balloc.c')
-rw-r--r--fs/ufs/balloc.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/fs/ufs/balloc.c b/fs/ufs/balloc.c
index b82381475779..2e0021e8f366 100644
--- a/fs/ufs/balloc.c
+++ b/fs/ufs/balloc.c
@@ -275,6 +275,25 @@ static void ufs_change_blocknr(struct inode *inode, unsigned int baseblk,
UFSD("EXIT\n");
}
+static void ufs_clear_frags(struct inode *inode, sector_t beg, unsigned int n,
+ int sync)
+{
+ struct buffer_head *bh;
+ sector_t end = beg + n;
+
+ for (; beg < end; ++beg) {
+ bh = sb_getblk(inode->i_sb, beg);
+ lock_buffer(bh);
+ memset(bh->b_data, 0, inode->i_sb->s_blocksize);
+ set_buffer_uptodate(bh);
+ mark_buffer_dirty(bh);
+ unlock_buffer(bh);
+ if (IS_SYNC(inode) || sync)
+ sync_dirty_buffer(bh);
+ brelse(bh);
+ }
+}
+
unsigned ufs_new_fragments(struct inode * inode, __fs32 * p, unsigned fragment,
unsigned goal, unsigned count, int * err, struct page *locked_page)
{
@@ -350,6 +369,8 @@ unsigned ufs_new_fragments(struct inode * inode, __fs32 * p, unsigned fragment,
*p = cpu_to_fs32(sb, result);
*err = 0;
UFS_I(inode)->i_lastfrag = max_t(u32, UFS_I(inode)->i_lastfrag, fragment + count);
+ ufs_clear_frags(inode, result + oldcount, newcount - oldcount,
+ locked_page != NULL);
}
unlock_super(sb);
UFSD("EXIT, result %u\n", result);
@@ -363,6 +384,8 @@ unsigned ufs_new_fragments(struct inode * inode, __fs32 * p, unsigned fragment,
if (result) {
*err = 0;
UFS_I(inode)->i_lastfrag = max_t(u32, UFS_I(inode)->i_lastfrag, fragment + count);
+ ufs_clear_frags(inode, result + oldcount, newcount - oldcount,
+ locked_page != NULL);
unlock_super(sb);
UFSD("EXIT, result %u\n", result);
return result;
@@ -398,6 +421,8 @@ unsigned ufs_new_fragments(struct inode * inode, __fs32 * p, unsigned fragment,
*p = cpu_to_fs32(sb, result);
*err = 0;
UFS_I(inode)->i_lastfrag = max_t(u32, UFS_I(inode)->i_lastfrag, fragment + count);
+ ufs_clear_frags(inode, result + oldcount, newcount - oldcount,
+ locked_page != NULL);
unlock_super(sb);
if (newcount < request)
ufs_free_fragments (inode, result + newcount, request - newcount);