diff options
| author | Amir Goldstein <amir73il@gmail.com> | 2023-10-23 21:07:58 +0300 |
|---|---|---|
| committer | Christian Brauner <brauner@kernel.org> | 2023-10-24 17:57:45 +0200 |
| commit | 66c62769bcf6aa142e2309278980a2e52f4b08db (patch) | |
| tree | fbe1385b834c7bf57b87655684bdba6cfdc67634 /include/linux/exportfs.h | |
| parent | 05d3ef8bba77c1b5f98d941d8b2d4aeab8118ef1 (diff) | |
exportfs: add helpers to check if filesystem can encode/decode file handles
The logic of whether filesystem can encode/decode file handles is open
coded in many places.
In preparation to changing the logic, move the open coded logic into
inline helpers.
Reviewed-by: Jan Kara <jack@suse.cz>
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Amir Goldstein <amir73il@gmail.com>
Link: https://lore.kernel.org/r/20231023180801.2953446-2-amir73il@gmail.com
Signed-off-by: Christian Brauner <brauner@kernel.org>
Diffstat (limited to 'include/linux/exportfs.h')
| -rw-r--r-- | include/linux/exportfs.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/include/linux/exportfs.h b/include/linux/exportfs.h index 11fbd0ee1370..5b3c9f30b422 100644 --- a/include/linux/exportfs.h +++ b/include/linux/exportfs.h @@ -233,6 +233,33 @@ extern int exportfs_encode_inode_fh(struct inode *inode, struct fid *fid, extern int exportfs_encode_fh(struct dentry *dentry, struct fid *fid, int *max_len, int flags); +static inline bool exportfs_can_encode_fid(const struct export_operations *nop) +{ + return nop; +} + +static inline bool exportfs_can_decode_fh(const struct export_operations *nop) +{ + return nop && nop->fh_to_dentry; +} + +static inline bool exportfs_can_encode_fh(const struct export_operations *nop, + int fh_flags) +{ + /* + * If a non-decodeable file handle was requested, we only need to make + * sure that filesystem can encode file handles. + */ + if (fh_flags & EXPORT_FH_FID) + return exportfs_can_encode_fid(nop); + + /* + * If a decodeable file handle was requested, we need to make sure that + * filesystem can also decode file handles. + */ + return exportfs_can_decode_fh(nop); +} + static inline int exportfs_encode_fid(struct inode *inode, struct fid *fid, int *max_len) { |