[PATCH v4 11/11] nfsd: handle delegated timestamps in SETATTR

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



Allow SETATTR to handle delegated timestamps. This patch assumes that
only the delegation holder has the ability to set the timestamps in this
way, so we only allow this if the SETATTR stateid refers to the
delegation.

Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxx>
---
 fs/nfsd/nfs4proc.c | 29 ++++++++++++++++++++++++++---
 fs/nfsd/nfs4xdr.c  | 20 ++++++++++++++++++++
 2 files changed, 46 insertions(+), 3 deletions(-)

diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index b5a6bf4f459f..7f874943583c 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -1133,18 +1133,41 @@ nfsd4_setattr(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 		.na_iattr	= &setattr->sa_iattr,
 		.na_seclabel	= &setattr->sa_label,
 	};
+	struct nfs4_stid *st = NULL;
 	struct inode *inode;
 	__be32 status = nfs_ok;
-	bool save_no_wcc;
+	bool save_no_wcc, deleg_attrs;
 	int err;
 
-	if (setattr->sa_iattr.ia_valid & ATTR_SIZE) {
+	deleg_attrs = setattr->sa_bmval[2] & (FATTR4_WORD2_TIME_DELEG_ACCESS |
+					      FATTR4_WORD2_TIME_DELEG_MODIFY);
+
+	if (deleg_attrs || (setattr->sa_iattr.ia_valid & ATTR_SIZE)) {
 		status = nfs4_preprocess_stateid_op(rqstp, cstate,
 				&cstate->current_fh, &setattr->sa_stateid,
-				WR_STATE, NULL, NULL);
+				WR_STATE, NULL, &st);
 		if (status)
 			return status;
 	}
+
+	/*
+	 * If client is trying to set delegated timestamps, ensure that the
+	 * stateid refers to a write delegation.
+	 */
+	if (deleg_attrs) {
+		status = nfserr_bad_stateid;
+		if (st->sc_type & SC_TYPE_DELEG) {
+			struct nfs4_delegation *dp = delegstateid(st);
+
+			if (dp->dl_type == NFS4_OPEN_DELEGATE_WRITE)
+				status = nfs_ok;
+		}
+	}
+	if (st)
+		nfs4_put_stid(st);
+	if (status)
+		return status;
+
 	err = fh_want_write(&cstate->current_fh);
 	if (err)
 		return nfserrno(err);
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index b11d75f483de..0dea4ee8b19e 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -521,6 +521,26 @@ nfsd4_decode_fattr4(struct nfsd4_compoundargs *argp, u32 *bmval, u32 bmlen,
 		*umask = mask & S_IRWXUGO;
 		iattr->ia_valid |= ATTR_MODE;
 	}
+	if (bmval[2] & FATTR4_WORD2_TIME_DELEG_ACCESS) {
+		fattr4_time_deleg_access access;
+
+		if (!xdrgen_decode_fattr4_time_deleg_access(argp->xdr, &access))
+			return nfserr_bad_xdr;
+		iattr->ia_atime.tv_sec = access.seconds;
+		iattr->ia_atime.tv_nsec = access.nseconds;
+		iattr->ia_valid |= ATTR_ATIME | ATTR_ATIME_SET | ATTR_DELEG;
+	}
+	if (bmval[2] & FATTR4_WORD2_TIME_DELEG_MODIFY) {
+		fattr4_time_deleg_modify modify;
+
+		if (!xdrgen_decode_fattr4_time_deleg_modify(argp->xdr, &modify))
+			return nfserr_bad_xdr;
+		iattr->ia_mtime.tv_sec = modify.seconds;
+		iattr->ia_mtime.tv_nsec = modify.nseconds;
+		iattr->ia_ctime.tv_sec = modify.seconds;
+		iattr->ia_ctime.tv_nsec = modify.seconds;
+		iattr->ia_valid |= ATTR_CTIME | ATTR_MTIME | ATTR_MTIME_SET | ATTR_DELEG;
+	}
 
 	/* request sanity: did attrlist4 contain the expected number of words? */
 	if (attrlist4_count != xdr_stream_pos(argp->xdr) - starting_pos)

-- 
2.46.0





[Index of Archives]     [Linux Ext4 Filesystem]     [Union Filesystem]     [Filesystem Testing]     [Ceph Users]     [Ecryptfs]     [NTFS 3]     [AutoFS]     [Kernel Newbies]     [Share Photos]     [Security]     [Netfilter]     [Bugtraq]     [Yosemite News]     [MIPS Linux]     [ARM Linux]     [Linux Security]     [Linux Cachefs]     [Reiser Filesystem]     [Linux RAID]     [NTFS 3]     [Samba]     [Device Mapper]     [CEPH Development]

  Powered by Linux