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authorRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2010-08-27 00:23:02 +0900
committerRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2010-10-23 09:24:34 +0900
commit8e656fd518784b49453f60c5f78b78703bc85cb2 (patch)
tree7adf4b71aba4bdf31dc05489a06933c48a0ea6f2 /include/linux
parent4d8d9293dce503eb0e083e17a02a328d397e7f00 (diff)
nilfs2: make snapshots in checkpoint tree exportable
The previous export operations cannot handle multiple versions of a filesystem if they belong to the same sb instance. This adds a new type of file handle and extends export operations so that they can get the inode specified by a checkpoint number as well as an inode number and a generation number. Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Diffstat (limited to 'include/linux')
-rw-r--r--include/linux/exportfs.h13
1 files changed, 13 insertions, 0 deletions
diff --git a/include/linux/exportfs.h b/include/linux/exportfs.h
index a9cd507f8cd2..28028988c862 100644
--- a/include/linux/exportfs.h
+++ b/include/linux/exportfs.h
@@ -67,6 +67,19 @@ enum fid_type {
* 32 bit parent block number, 32 bit parent generation number
*/
FILEID_UDF_WITH_PARENT = 0x52,
+
+ /*
+ * 64 bit checkpoint number, 64 bit inode number,
+ * 32 bit generation number.
+ */
+ FILEID_NILFS_WITHOUT_PARENT = 0x61,
+
+ /*
+ * 64 bit checkpoint number, 64 bit inode number,
+ * 32 bit generation number, 32 bit parent generation.
+ * 64 bit parent inode number.
+ */
+ FILEID_NILFS_WITH_PARENT = 0x62,
};
struct fid {