Cyrill Gorcunov <[email protected]> writes: > To provide fsnotify object inodes being watched without > binding to alphabetical path we need to encode them with > exportfs help. This patch adds a helper which operates > with plain inodes directly.
doesn't name_to_handle_at() work for you ? It also allows to get a file handle using file descriptor. > > Signed-off-by: Cyrill Gorcunov <[email protected]> > Acked-by: Pavel Emelyanov <[email protected]> > CC: Al Viro <[email protected]> > CC: Alexey Dobriyan <[email protected]> > CC: Andrew Morton <[email protected]> > CC: James Bottomley <[email protected]> > --- > fs/exportfs/expfs.c | 19 +++++++++++++++++++ > include/linux/exportfs.h | 2 ++ > 2 files changed, 21 insertions(+) > > Index: linux-2.6.git/fs/exportfs/expfs.c > =================================================================== > --- linux-2.6.git.orig/fs/exportfs/expfs.c > +++ linux-2.6.git/fs/exportfs/expfs.c > @@ -302,6 +302,25 @@ out: > return error; > } > > +int export_encode_inode_fh(struct inode *inode, struct fid *fid, int > *max_len) > +{ > + int len = *max_len; > + int type = FILEID_INO32_GEN; > + > + if (len < 2) { > + *max_len = 2; > + return 255; > + } > + > + len = 2; > + fid->i32.ino = inode->i_ino; > + fid->i32.gen = inode->i_generation; > + *max_len = len; > + > + return type; > +} > +EXPORT_SYMBOL_GPL(export_encode_inode_fh); > + If you are looking at getting file handle, that may not be sufficient. Some file system put more info in file handle (btrfs) > /** > * export_encode_fh - default export_operations->encode_fh function > * @inode: the object to encode > Index: linux-2.6.git/include/linux/exportfs.h > =================================================================== > --- linux-2.6.git.orig/include/linux/exportfs.h > +++ linux-2.6.git/include/linux/exportfs.h > @@ -177,6 +177,8 @@ struct export_operations { > int (*commit_metadata)(struct inode *inode); > }; > > +extern int export_encode_inode_fh(struct inode *inode, struct fid *fid, int > *max_len); > + > extern int exportfs_encode_fh(struct dentry *dentry, struct fid *fid, > int *max_len, int connectable); > extern struct dentry *exportfs_decode_fh(struct vfsmount *mnt, struct fid > *fid, > -aneesh -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
