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Fix invalid fileid for snapshot root dentry 

Prevents NFS client from detection of different fileids of snapshot root dentry
before & after snapshot mount.

Signed-off-by: Andrey Vesnovaty <andrey.vesnovaty@gmail.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
This commit is contained in:
Andrey Vesnovaty 2013-07-30 12:59:34 +03:00 committed by Brian Behlendorf
parent e20cd6f7a8
commit aa9b27080b
1 changed files with 10 additions and 0 deletions
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10
module/zfs/zfs_vnops.c
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@ -2415,6 +2415,16 @@ zfs_getattr_fast(struct inode *ip, struct kstat *sp)
mutex_exit(&zp->z_lock);
/*
* Required to prevent NFS client from detecting different inode
* numbers of snapshot root dentry before and after snapshot mount.
*/
if (zsb->z_issnap) {
if (ip->i_sb->s_root->d_inode == ip)
sp->ino = ZFSCTL_INO_SNAPDIRS -
dmu_objset_id(zsb->z_os);
}
ZFS_EXIT(zsb);
return (0);