ecryptfs: set s_blocksize from lower fs in sb

eCryptfs wasn't setting s_blocksize in it's superblock; just pick it up
from the lower FS.  Having an s_blocksize of 0 made things like "filefrag"
which call FIGETBSZ unhappy.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Acked-by: Mike Halcrow <mhalcrow@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c
index b83a512b7e08..a277754da171 100644
--- a/fs/ecryptfs/main.c
+++ b/fs/ecryptfs/main.c
@@ -523,6 +523,7 @@ static int ecryptfs_read_super(struct super_block *sb, const char *dev_name)
         lower_mnt = nd.mnt;
         ecryptfs_set_superblock_lower(sb, lower_root->d_sb);
         sb->s_maxbytes = lower_root->d_sb->s_maxbytes;
+        sb->s_blocksize = lower_root->d_sb->s_blocksize;
         ecryptfs_set_dentry_lower(sb->s_root, lower_root);
         ecryptfs_set_dentry_lower_mnt(sb->s_root, lower_mnt);
         rc = ecryptfs_interpose(lower_root, sb->s_root, sb, 0);