summaryrefslogtreecommitdiff
path: root/include/linux/exportfs.h
diff options
context:
space:
mode:
authorTejun Heo <tj@kernel.org>2019-11-05 02:54:30 +0300
committerTejun Heo <tj@kernel.org>2019-11-12 19:18:04 +0300
commit33c5ac9175195c36a0b7005aaf503a2e81f117a1 (patch)
tree15d6857075452a053ad701ae4bb564135ad14998 /include/linux/exportfs.h
parentfe0f726c9fb626b1092a9ea3bf75f57f2eed676e (diff)
downloadlinux-33c5ac9175195c36a0b7005aaf503a2e81f117a1.tar.xz
kernfs: implement custom exportfs ops and fid type
The current kernfs exportfs implementation uses the generic_fh_*() helpers and FILEID_INO32_GEN[_PARENT] which limits ino to 32bits. Let's implement custom exportfs operations and fid type to remove the restriction. * FILEID_KERNFS is a single u64 value whose content is kernfs_node->id. This is the only native fid type. * For backward compatibility with blk_log_action() path which exposes (ino,gen) pairs which userland assembles into FILEID_INO32_GEN keys, combine the generic keys into 64bit IDs in the same order. Signed-off-by: Tejun Heo <tj@kernel.org> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Namhyung Kim <namhyung@kernel.org>
Diffstat (limited to 'include/linux/exportfs.h')
-rw-r--r--include/linux/exportfs.h5
1 files changed, 5 insertions, 0 deletions
diff --git a/include/linux/exportfs.h b/include/linux/exportfs.h
index cf6571fc9c01..d896b8657085 100644
--- a/include/linux/exportfs.h
+++ b/include/linux/exportfs.h
@@ -105,6 +105,11 @@ enum fid_type {
FILEID_LUSTRE = 0x97,
/*
+ * 64 bit unique kernfs id
+ */
+ FILEID_KERNFS = 0xfe,
+
+ /*
* Filesystems must not use 0xff file ID.
*/
FILEID_INVALID = 0xff,