Commit 216b6cbd authored by Namjae Jeon's avatar Namjae Jeon Committed by J. Bruce Fields

exportfs: add FILEID_INVALID to indicate invalid fid_type

This commit adds FILEID_INVALID = 0xff in fid_type to
indicate invalid fid_type

It avoids using magic number 255
Signed-off-by: default avatarNamjae Jeon <linkinjeon@gmail.com>
Signed-off-by: default avatarVivek Trivedi <vtrivedi018@gmail.com>
Signed-off-by: default avatarJ. Bruce Fields <bfields@redhat.com>
parent 6f0c0580
......@@ -322,10 +322,10 @@ static int export_encode_fh(struct inode *inode, struct fid *fid,
if (parent && (len < 4)) {
*max_len = 4;
return 255;
return FILEID_INVALID;
} else if (len < 2) {
*max_len = 2;
return 255;
return FILEID_INVALID;
}
len = 2;
......
......@@ -52,7 +52,7 @@ static long do_sys_name_to_handle(struct path *path,
handle_bytes = handle_dwords * sizeof(u32);
handle->handle_bytes = handle_bytes;
if ((handle->handle_bytes > f_handle.handle_bytes) ||
(retval == 255) || (retval == -ENOSPC)) {
(retval == FILEID_INVALID) || (retval == -ENOSPC)) {
/* As per old exportfs_encode_fh documentation
* we could return ENOSPC to indicate overflow
* But file system returned 255 always. So handle
......
......@@ -572,7 +572,7 @@ fh_compose(struct svc_fh *fhp, struct svc_export *exp, struct dentry *dentry,
if (inode)
_fh_update(fhp, exp, dentry);
if (fhp->fh_handle.fh_fileid_type == 255) {
if (fhp->fh_handle.fh_fileid_type == FILEID_INVALID) {
fh_put(fhp);
return nfserr_opnotsupp;
}
......@@ -603,7 +603,7 @@ fh_update(struct svc_fh *fhp)
goto out;
_fh_update(fhp, fhp->fh_export, dentry);
if (fhp->fh_handle.fh_fileid_type == 255)
if (fhp->fh_handle.fh_fileid_type == FILEID_INVALID)
return nfserr_opnotsupp;
}
out:
......
......@@ -83,6 +83,11 @@ enum fid_type {
* 64 bit parent inode number.
*/
FILEID_NILFS_WITH_PARENT = 0x62,
/*
* Filesystems must not use 0xff file ID.
*/
FILEID_INVALID = 0xff,
};
struct fid {
......
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