This is a note to let you know that I've just added the patch titled
NFSD: drop support for ancient filehandles
to the 5.10-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
nfsd-drop-support-for-ancient-filehandles.patch
and it can be found in the queue-5.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 4f4b556d21c48c6aebd18ba12df536783e52c00f
Author: NeilBrown <neilb@xxxxxxx>
Date: Thu Sep 2 11:15:29 2021 +1000
NFSD: drop support for ancient filehandles
[ Upstream commit c645a883df34ee10b884ec921e850def54b7f461 ]
Filehandles not in the "new" or "version 1" format have not been handed
out for new mounts since Linux 2.4 which was released 20 years ago.
I think it is safe to say that no such file handles are still in use,
and that we can drop support for them.
Signed-off-by: NeilBrown <neilb@xxxxxxx>
Signed-off-by: J. Bruce Fields <bfields@xxxxxxxxxx>
Signed-off-by: Chuck Lever <chuck.lever@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/fs/nfsd/nfsfh.c b/fs/nfsd/nfsfh.c
index 04930056222b7..7e5a508173a04 100644
--- a/fs/nfsd/nfsfh.c
+++ b/fs/nfsd/nfsfh.c
@@ -153,11 +153,12 @@ static inline __be32 check_pseudo_root(struct svc_rqst *rqstp,
static __be32 nfsd_set_fh_dentry(struct svc_rqst *rqstp, struct svc_fh *fhp)
{
struct knfsd_fh *fh = &fhp->fh_handle;
- struct fid *fid = NULL, sfid;
+ struct fid *fid = NULL;
struct svc_export *exp;
struct dentry *dentry;
int fileid_type;
int data_left = fh->fh_size/4;
+ int len;
__be32 error;
error = nfserr_stale;
@@ -166,48 +167,35 @@ static __be32 nfsd_set_fh_dentry(struct svc_rqst *rqstp, struct svc_fh *fhp)
if (rqstp->rq_vers == 4 && fh->fh_size == 0)
return nfserr_nofilehandle;
- if (fh->fh_version == 1) {
- int len;
-
- if (--data_left < 0)
- return error;
- if (fh->fh_auth_type != 0)
- return error;
- len = key_len(fh->fh_fsid_type) / 4;
- if (len == 0)
- return error;
- if (fh->fh_fsid_type == FSID_MAJOR_MINOR) {
- /* deprecated, convert to type 3 */
- len = key_len(FSID_ENCODE_DEV)/4;
- fh->fh_fsid_type = FSID_ENCODE_DEV;
- /*
- * struct knfsd_fh uses host-endian fields, which are
- * sometimes used to hold net-endian values. This
- * confuses sparse, so we must use __force here to
- * keep it from complaining.
- */
- fh->fh_fsid[0] = new_encode_dev(MKDEV(ntohl((__force __be32)fh->fh_fsid[0]),
- ntohl((__force __be32)fh->fh_fsid[1])));
- fh->fh_fsid[1] = fh->fh_fsid[2];
- }
- data_left -= len;
- if (data_left < 0)
- return error;
- exp = rqst_exp_find(rqstp, fh->fh_fsid_type, fh->fh_fsid);
- fid = (struct fid *)(fh->fh_fsid + len);
- } else {
- __u32 tfh[2];
- dev_t xdev;
- ino_t xino;
-
- if (fh->fh_size != NFS_FHSIZE)
- return error;
- /* assume old filehandle format */
- xdev = old_decode_dev(fh->ofh_xdev);
- xino = u32_to_ino_t(fh->ofh_xino);
- mk_fsid(FSID_DEV, tfh, xdev, xino, 0, NULL);
- exp = rqst_exp_find(rqstp, FSID_DEV, tfh);
+ if (fh->fh_version != 1)
+ return error;
+
+ if (--data_left < 0)
+ return error;
+ if (fh->fh_auth_type != 0)
+ return error;
+ len = key_len(fh->fh_fsid_type) / 4;
+ if (len == 0)
+ return error;
+ if (fh->fh_fsid_type == FSID_MAJOR_MINOR) {
+ /* deprecated, convert to type 3 */
+ len = key_len(FSID_ENCODE_DEV)/4;
+ fh->fh_fsid_type = FSID_ENCODE_DEV;
+ /*
+ * struct knfsd_fh uses host-endian fields, which are
+ * sometimes used to hold net-endian values. This
+ * confuses sparse, so we must use __force here to
+ * keep it from complaining.
+ */
+ fh->fh_fsid[0] = new_encode_dev(MKDEV(ntohl((__force __be32)fh->fh_fsid[0]),
+ ntohl((__force __be32)fh->fh_fsid[1])));
+ fh->fh_fsid[1] = fh->fh_fsid[2];
}
+ data_left -= len;
+ if (data_left < 0)
+ return error;
+ exp = rqst_exp_find(rqstp, fh->fh_fsid_type, fh->fh_fsid);
+ fid = (struct fid *)(fh->fh_fsid + len);
error = nfserr_stale;
if (IS_ERR(exp)) {
@@ -252,18 +240,7 @@ static __be32 nfsd_set_fh_dentry(struct svc_rqst *rqstp, struct svc_fh *fhp)
if (rqstp->rq_vers > 2)
error = nfserr_badhandle;
- if (fh->fh_version != 1) {
- sfid.i32.ino = fh->ofh_ino;
- sfid.i32.gen = fh->ofh_generation;
- sfid.i32.parent_ino = fh->ofh_dirino;
- fid = &sfid;
- data_left = 3;
- if (fh->ofh_dirino == 0)
- fileid_type = FILEID_INO32_GEN;
- else
- fileid_type = FILEID_INO32_GEN_PARENT;
- } else
- fileid_type = fh->fh_fileid_type;
+ fileid_type = fh->fh_fileid_type;
if (fileid_type == FILEID_ROOT)
dentry = dget(exp->ex_path.dentry);
@@ -451,20 +428,6 @@ static void _fh_update(struct svc_fh *fhp, struct svc_export *exp,
}
}
-/*
- * for composing old style file handles
- */
-static inline void _fh_update_old(struct dentry *dentry,
- struct svc_export *exp,
- struct knfsd_fh *fh)
-{
- fh->ofh_ino = ino_t_to_u32(d_inode(dentry)->i_ino);
- fh->ofh_generation = d_inode(dentry)->i_generation;
- if (d_is_dir(dentry) ||
- (exp->ex_flags & NFSEXP_NOSUBTREECHECK))
- fh->ofh_dirino = 0;
-}
-
static bool is_root_export(struct svc_export *exp)
{
return exp->ex_path.dentry == exp->ex_path.dentry->d_sb->s_root;
@@ -561,9 +524,6 @@ fh_compose(struct svc_fh *fhp, struct svc_export *exp, struct dentry *dentry,
/* ref_fh is a reference file handle.
* if it is non-null and for the same filesystem, then we should compose
* a filehandle which is of the same version, where possible.
- * Currently, that means that if ref_fh->fh_handle.fh_version == 0xca
- * Then create a 32byte filehandle using nfs_fhbase_old
- *
*/
struct inode * inode = d_inode(dentry);
@@ -599,35 +559,21 @@ fh_compose(struct svc_fh *fhp, struct svc_export *exp, struct dentry *dentry,
fhp->fh_dentry = dget(dentry); /* our internal copy */
fhp->fh_export = exp_get(exp);
- if (fhp->fh_handle.fh_version == 0xca) {
- /* old style filehandle please */
- memset(&fhp->fh_handle.fh_base, 0, NFS_FHSIZE);
- fhp->fh_handle.fh_size = NFS_FHSIZE;
- fhp->fh_handle.ofh_dcookie = 0xfeebbaca;
- fhp->fh_handle.ofh_dev = old_encode_dev(ex_dev);
- fhp->fh_handle.ofh_xdev = fhp->fh_handle.ofh_dev;
- fhp->fh_handle.ofh_xino =
- ino_t_to_u32(d_inode(exp->ex_path.dentry)->i_ino);
- fhp->fh_handle.ofh_dirino = ino_t_to_u32(parent_ino(dentry));
- if (inode)
- _fh_update_old(dentry, exp, &fhp->fh_handle);
- } else {
- fhp->fh_handle.fh_size =
- key_len(fhp->fh_handle.fh_fsid_type) + 4;
- fhp->fh_handle.fh_auth_type = 0;
-
- mk_fsid(fhp->fh_handle.fh_fsid_type,
- fhp->fh_handle.fh_fsid,
- ex_dev,
- d_inode(exp->ex_path.dentry)->i_ino,
- exp->ex_fsid, exp->ex_uuid);
-
- if (inode)
- _fh_update(fhp, exp, dentry);
- if (fhp->fh_handle.fh_fileid_type == FILEID_INVALID) {
- fh_put(fhp);
- return nfserr_opnotsupp;
- }
+ fhp->fh_handle.fh_size =
+ key_len(fhp->fh_handle.fh_fsid_type) + 4;
+ fhp->fh_handle.fh_auth_type = 0;
+
+ mk_fsid(fhp->fh_handle.fh_fsid_type,
+ fhp->fh_handle.fh_fsid,
+ ex_dev,
+ d_inode(exp->ex_path.dentry)->i_ino,
+ exp->ex_fsid, exp->ex_uuid);
+
+ if (inode)
+ _fh_update(fhp, exp, dentry);
+ if (fhp->fh_handle.fh_fileid_type == FILEID_INVALID) {
+ fh_put(fhp);
+ return nfserr_opnotsupp;
}
return 0;
@@ -648,16 +594,12 @@ fh_update(struct svc_fh *fhp)
dentry = fhp->fh_dentry;
if (d_really_is_negative(dentry))
goto out_negative;
- if (fhp->fh_handle.fh_version != 1) {
- _fh_update_old(dentry, fhp->fh_export, &fhp->fh_handle);
- } else {
- if (fhp->fh_handle.fh_fileid_type != FILEID_ROOT)
- return 0;
+ if (fhp->fh_handle.fh_fileid_type != FILEID_ROOT)
+ return 0;
- _fh_update(fhp, fhp->fh_export, dentry);
- if (fhp->fh_handle.fh_fileid_type == FILEID_INVALID)
- return nfserr_opnotsupp;
- }
+ _fh_update(fhp, fhp->fh_export, dentry);
+ if (fhp->fh_handle.fh_fileid_type == FILEID_INVALID)
+ return nfserr_opnotsupp;
return 0;
out_bad:
printk(KERN_ERR "fh_update: fh not verified!\n");
diff --git a/fs/nfsd/nfsfh.h b/fs/nfsd/nfsfh.h
index ad47f16676a8c..8b5587f274a7d 100644
--- a/fs/nfsd/nfsfh.h
+++ b/fs/nfsd/nfsfh.h
@@ -14,26 +14,7 @@
#include <linux/exportfs.h>
#include <linux/nfs4.h>
-
-/*
- * This is the old "dentry style" Linux NFSv2 file handle.
- *
- * The xino and xdev fields are currently used to transport the
- * ino/dev of the exported inode.
- */
-struct nfs_fhbase_old {
- u32 fb_dcookie; /* dentry cookie - always 0xfeebbaca */
- u32 fb_ino; /* our inode number */
- u32 fb_dirino; /* dir inode number, 0 for directories */
- u32 fb_dev; /* our device */
- u32 fb_xdev;
- u32 fb_xino;
- u32 fb_generation;
-};
-
/*
- * This is the new flexible, extensible style NFSv2/v3/v4 file handle.
- *
* The file handle starts with a sequence of four-byte words.
* The first word contains a version number (1) and three descriptor bytes
* that tell how the remaining 3 variable length fields should be handled.
@@ -57,7 +38,7 @@ struct nfs_fhbase_old {
* 6 - 16 byte uuid
* 7 - 8 byte inode number and 16 byte uuid
*
- * The fileid_type identified how the file within the filesystem is encoded.
+ * The fileid_type identifies how the file within the filesystem is encoded.
* The values for this field are filesystem specific, exccept that
* filesystems must not use the values '0' or '0xff'. 'See enum fid_type'
* in include/linux/exportfs.h for currently registered values.
@@ -65,7 +46,7 @@ struct nfs_fhbase_old {
struct nfs_fhbase_new {
union {
struct {
- u8 fb_version_aux; /* == 1, even => nfs_fhbase_old */
+ u8 fb_version_aux; /* == 1 */
u8 fb_auth_type_aux;
u8 fb_fsid_type_aux;
u8 fb_fileid_type_aux;
@@ -74,7 +55,7 @@ struct nfs_fhbase_new {
/* u32 fb_fileid[0]; floating */
};
struct {
- u8 fb_version; /* == 1, even => nfs_fhbase_old */
+ u8 fb_version; /* == 1 */
u8 fb_auth_type;
u8 fb_fsid_type;
u8 fb_fileid_type;
@@ -89,20 +70,11 @@ struct knfsd_fh {
* a new file handle
*/
union {
- struct nfs_fhbase_old fh_old;
u32 fh_pad[NFS4_FHSIZE/4];
struct nfs_fhbase_new fh_new;
} fh_base;
};
-#define ofh_dcookie fh_base.fh_old.fb_dcookie
-#define ofh_ino fh_base.fh_old.fb_ino
-#define ofh_dirino fh_base.fh_old.fb_dirino
-#define ofh_dev fh_base.fh_old.fb_dev
-#define ofh_xdev fh_base.fh_old.fb_xdev
-#define ofh_xino fh_base.fh_old.fb_xino
-#define ofh_generation fh_base.fh_old.fb_generation
-
#define fh_version fh_base.fh_new.fb_version
#define fh_fsid_type fh_base.fh_new.fb_fsid_type
#define fh_auth_type fh_base.fh_new.fb_auth_type
