diff options
| author | Cyril Plisko <[email protected]> | 2012-08-24 15:38:55 +0300 |
|---|---|---|
| committer | Brian Behlendorf <[email protected]> | 2012-09-06 12:47:11 -0700 |
| commit | 04f9432d3bcb15ff8ed6ddc2dc377a4c0264340d (patch) | |
| tree | d8f0a6ac9a16f1abc332f84de1eb5ad7b75d4af4 /module | |
| parent | 4b2f65b253952c5103311cc8bb4b8cdc6836fd7e (diff) | |
Make ZFS filesystem id persistent across different machines
Use ZFS dataset fsid guid as a unique file system id, similar to what is
done on Illumos/OpenSolaris.
Signed-off-by: Cyril Plisko <[email protected]>
Signed-off-by: Brian Behlendorf <[email protected]>
Closes #888
Diffstat (limited to 'module')
| -rw-r--r-- | module/zfs/zfs_vfsops.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/module/zfs/zfs_vfsops.c b/module/zfs/zfs_vfsops.c index 1efe6a8c9..8fe457e49 100644 --- a/module/zfs/zfs_vfsops.c +++ b/module/zfs/zfs_vfsops.c @@ -920,6 +920,7 @@ zfs_statvfs(struct dentry *dentry, struct kstatfs *statp) { zfs_sb_t *zsb = dentry->d_sb->s_fs_info; uint64_t refdbytes, availbytes, usedobjs, availobjs; + uint64_t fsid; uint32_t bshift; ZFS_ENTER(zsb); @@ -927,6 +928,7 @@ zfs_statvfs(struct dentry *dentry, struct kstatfs *statp) dmu_objset_space(zsb->z_os, &refdbytes, &availbytes, &usedobjs, &availobjs); + fsid = dmu_objset_fsid_guid(zsb->z_os); /* * The underlying storage pool actually uses multiple block * size. Under Solaris frsize (fragment size) is reported as @@ -960,8 +962,8 @@ zfs_statvfs(struct dentry *dentry, struct kstatfs *statp) */ statp->f_ffree = MIN(availobjs, availbytes >> DNODE_SHIFT); statp->f_files = statp->f_ffree + usedobjs; - statp->f_fsid.val[0] = dentry->d_sb->s_dev; - statp->f_fsid.val[1] = 0; + statp->f_fsid.val[0] = (uint32_t)fsid; + statp->f_fsid.val[1] = (uint32_t)(fsid >> 32); statp->f_type = ZFS_SUPER_MAGIC; statp->f_namelen = ZFS_MAXNAMELEN; |