udf: Set i_generation field

Currently UDF doesn't initialize i_generation in any way and thus NFS
can easily get reallocated inodes from stale file handles. Luckily UDF
already has a unique object identifier associated with each inode -
i_unique. Use that for initialization of i_generation.

Signed-off-by: Jan Kara <jack@suse.cz>

diff --git a/fs/udf/ialloc.c b/fs/udf/ialloc.c
index 6eaf5ed..647370d 100644 (file)
--- a/fs/udf/ialloc.c
+++ b/fs/udf/ialloc.c
@@ -95,6 +95,7 @@ struct inode *udf_new_inode(struct inode *dir, umode_t mode, int *err)
        lvidiu = udf_sb_lvidiu(sb);
        if (lvidiu) {
                iinfo->i_unique = lvid_get_unique_id(sb);
+               inode->i_generation = iinfo->i_unique;
                mutex_lock(&sbi->s_alloc_mutex);
                if (S_ISDIR(mode))
                        le32_add_cpu(&lvidiu->numDirs, 1);

diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index 3a44d91..0859884 100644 (file)
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -1484,6 +1484,7 @@ reread:
                iinfo->i_lenAlloc = le32_to_cpu(efe->lengthAllocDescs);
                iinfo->i_checkpoint = le32_to_cpu(efe->checkpoint);
        }
+       inode->i_generation = iinfo->i_unique;
 
        switch (fe->icbTag.fileType) {
        case ICBTAG_FILE_TYPE_DIRECTORY: