Merge remote-tracking branch 'nfsd/nfsd-next'

11 files changed, 55 insertions, 58 deletions

diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c
index 1c13dd80744f..7e4ea3b9f472 100644
--- a/fs/lockd/svc.c
+++ b/fs/lockd/svc.c
@@ -322,6 +322,8 @@ static int lockd_inet6addr_event(struct notifier_block *this,
 		dprintk("lockd_inet6addr_event: removed %pI6\n", &ifa->addr);
 		sin6.sin6_family = AF_INET6;
 		sin6.sin6_addr = ifa->addr;
+		if (ipv6_addr_type(&sin6.sin6_addr) & IPV6_ADDR_LINKLOCAL)
+			sin6.sin6_scope_id = ifa->idev->dev->ifindex;
 		svc_age_temp_xprts_now(nlmsvc_rqst->rq_server,
 			(struct sockaddr *)&sin6);
 	}
diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
index 43e109cc0ccc..e71f11b1a180 100644
--- a/fs/nfsd/export.c
+++ b/fs/nfsd/export.c
@@ -1102,6 +1102,7 @@ static struct flags {
 	{ NFSEXP_NOAUTHNLM, {"insecure_locks", ""}},
 	{ NFSEXP_V4ROOT, {"v4root", ""}},
 	{ NFSEXP_PNFS, {"pnfs", ""}},
+	{ NFSEXP_SECURITY_LABEL, {"security_label", ""}},
 	{ 0, {"", ""}}
 };
 
diff --git a/fs/nfsd/nfs3proc.c b/fs/nfsd/nfs3proc.c
index d818e4ffd79f..045c9081eabe 100644
--- a/fs/nfsd/nfs3proc.c
+++ b/fs/nfsd/nfs3proc.c
@@ -193,11 +193,9 @@ nfsd3_proc_write(struct svc_rqst *rqstp, struct nfsd3_writeargs *argp,
 
 	fh_copy(&resp->fh, &argp->fh);
 	resp->committed = argp->stable;
-	nfserr = nfsd_write(rqstp, &resp->fh, NULL,
-				   argp->offset,
-				   rqstp->rq_vec, argp->vlen,
-				   &cnt,
-				   &resp->committed);
+	nfserr = nfsd_write(rqstp, &resp->fh, argp->offset,
+				rqstp->rq_vec, argp->vlen,
+				&cnt, resp->committed);
 	resp->count = cnt;
 	RETURN_STATUS(nfserr);
 }
diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index 74a6e573e061..171f2d7ecfdd 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -95,11 +95,15 @@ check_attr_support(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 		   u32 *bmval, u32 *writable)
 {
 	struct dentry *dentry = cstate->current_fh.fh_dentry;
+	struct svc_export *exp = cstate->current_fh.fh_export;
 
 	if (!nfsd_attrs_supported(cstate->minorversion, bmval))
 		return nfserr_attrnotsupp;
 	if ((bmval[0] & FATTR4_WORD0_ACL) && !IS_POSIXACL(d_inode(dentry)))
 		return nfserr_attrnotsupp;
+	if ((bmval[2] & FATTR4_WORD2_SECURITY_LABEL) &&
+			!(exp->ex_flags & NFSEXP_SECURITY_LABEL))
+		return nfserr_attrnotsupp;
 	if (writable && !bmval_is_subset(bmval, writable))
 		return nfserr_inval;
 	if (writable && (bmval[2] & FATTR4_WORD2_MODE_UMASK) &&
@@ -983,7 +987,7 @@ nfsd4_write(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 
 	status = nfsd_vfs_write(rqstp, &cstate->current_fh, filp,
 				write->wr_offset, rqstp->rq_vec, nvecs, &cnt,
-				&write->wr_how_written);
+				write->wr_how_written);
 	fput(filp);
 
 	write->wr_bytes_written = cnt;
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 8fae53ce21d1..7e4df80456ff 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -58,7 +58,7 @@
 
 #define NFSDDBG_FACILITY		NFSDDBG_XDR
 
-u32 nfsd_suppattrs[3][3] = {
+const u32 nfsd_suppattrs[3][3] = {
 	{NFSD4_SUPPORTED_ATTRS_WORD0,
 	 NFSD4_SUPPORTED_ATTRS_WORD1,
 	 NFSD4_SUPPORTED_ATTRS_WORD2},
@@ -1250,7 +1250,7 @@ nfsd4_decode_write(struct nfsd4_compoundargs *argp, struct nfsd4_write *write)
 	READ_BUF(16);
 	p = xdr_decode_hyper(p, &write->wr_offset);
 	write->wr_stable_how = be32_to_cpup(p++);
-	if (write->wr_stable_how > 2)
+	if (write->wr_stable_how > NFS_FILE_SYNC)
 		goto xdr_error;
 	write->wr_buflen = be32_to_cpup(p++);
 
@@ -1966,9 +1966,13 @@ nfsd4_decode_compound(struct nfsd4_compoundargs *argp)
 	DECODE_TAIL;
 }
 
-static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode)
+static __be32 *encode_change(__be32 *p, struct kstat *stat, struct inode *inode,
+			     struct svc_export *exp)
 {
-	if (IS_I_VERSION(inode)) {
+	if (exp->ex_flags & NFSEXP_V4ROOT) {
+		*p++ = cpu_to_be32(convert_to_wallclock(exp->cd->flush_time));
+		*p++ = 0;
+	} else if (IS_I_VERSION(inode)) {
 		p = xdr_encode_hyper(p, inode->i_version);
 	} else {
 		*p++ = cpu_to_be32(stat->ctime.tv_sec);
@@ -2417,8 +2421,11 @@ nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
 #ifdef CONFIG_NFSD_V4_SECURITY_LABEL
 	if ((bmval2 & FATTR4_WORD2_SECURITY_LABEL) ||
 	     bmval0 & FATTR4_WORD0_SUPPORTED_ATTRS) {
-		err = security_inode_getsecctx(d_inode(dentry),
+		if (exp->ex_flags & NFSEXP_SECURITY_LABEL)
+			err = security_inode_getsecctx(d_inode(dentry),
 						&context, &contextlen);
+		else
+			err = -EOPNOTSUPP;
 		contextsupport = (err == 0);
 		if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
 			if (err == -EOPNOTSUPP)
@@ -2490,7 +2497,7 @@ nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
 		p = xdr_reserve_space(xdr, 8);
 		if (!p)
 			goto out_resource;
-		p = encode_change(p, &stat, d_inode(dentry));
+		p = encode_change(p, &stat, d_inode(dentry), exp);
 	}
 	if (bmval0 & FATTR4_WORD0_SIZE) {
 		p = xdr_reserve_space(xdr, 8);
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index f3b2f34b10a3..d54fb0e3f30e 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -569,8 +569,7 @@ static ssize_t __write_versions(struct file *file, char *buf, size_t size)
 			if (*minorp == '.') {
 				if (num != 4)
 					return -EINVAL;
-				minor = simple_strtoul(minorp+1, NULL, 0);
-				if (minor == 0)
+				if (kstrtouint(minorp+1, 0, &minor) < 0)
 					return -EINVAL;
 				if (nfsd_minorversion(minor, sign == '-' ?
 						     NFSD_CLEAR : NFSD_SET) < 0)
@@ -613,8 +612,13 @@ static ssize_t __write_versions(struct file *file, char *buf, size_t size)
 			tlen += len;
 		}
 	if (nfsd_vers(4, NFSD_AVAIL))
-		for (minor = 1; minor <= NFSD_SUPPORTED_MINOR_VERSION;
+		for (minor = 0; minor <= NFSD_SUPPORTED_MINOR_VERSION;
 		     minor++) {
+			if (minor == 0 && nfsd_minorversion(minor, NFSD_TEST))
+				/* for backward compatibility, don't report
+				 * +4.0
+				 */
+				continue;
 			len = snprintf(buf, remaining, " %c4.%u",
 					(nfsd_vers(4, NFSD_TEST) &&
 					 nfsd_minorversion(minor, NFSD_TEST)) ?
diff --git a/fs/nfsd/nfsd.h b/fs/nfsd/nfsd.h
index d74c8c44dc35..d96606801d47 100644
--- a/fs/nfsd/nfsd.h
+++ b/fs/nfsd/nfsd.h
@@ -362,16 +362,16 @@ void		nfsd_lockd_shutdown(void);
 	FATTR4_WORD2_MODE_UMASK | \
 	NFSD4_2_SECURITY_ATTRS)
 
-extern u32 nfsd_suppattrs[3][3];
+extern const u32 nfsd_suppattrs[3][3];
 
-static inline bool bmval_is_subset(u32 *bm1, u32 *bm2)
+static inline bool bmval_is_subset(const u32 *bm1, const u32 *bm2)
 {
 	return !((bm1[0] & ~bm2[0]) ||
 	         (bm1[1] & ~bm2[1]) ||
 		 (bm1[2] & ~bm2[2]));
 }
 
-static inline bool nfsd_attrs_supported(u32 minorversion, u32 *bmval)
+static inline bool nfsd_attrs_supported(u32 minorversion, const u32 *bmval)
 {
 	return bmval_is_subset(bmval, nfsd_suppattrs[minorversion]);
 }
diff --git a/fs/nfsd/nfsproc.c b/fs/nfsd/nfsproc.c
index 010aff5c5a79..fa82b7707e85 100644
--- a/fs/nfsd/nfsproc.c
+++ b/fs/nfsd/nfsproc.c
@@ -204,18 +204,14 @@ nfsd_proc_write(struct svc_rqst *rqstp, struct nfsd_writeargs *argp,
 					struct nfsd_attrstat  *resp)
 {
 	__be32	nfserr;
-	int	stable = 1;
 	unsigned long cnt = argp->len;
 
 	dprintk("nfsd: WRITE    %s %d bytes at %d\n",
 		SVCFH_fmt(&argp->fh),
 		argp->len, argp->offset);
 
-	nfserr = nfsd_write(rqstp, fh_copy(&resp->fh, &argp->fh), NULL,
-				   argp->offset,
-				   rqstp->rq_vec, argp->vlen,
-			           &cnt,
-				   &stable);
+	nfserr = nfsd_write(rqstp, fh_copy(&resp->fh, &argp->fh), argp->offset,
+				rqstp->rq_vec, argp->vlen, &cnt, NFS_DATA_SYNC);
 	return nfsd_return_attrs(nfserr, resp);
 }
 
diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index e6bfd96734c0..2e378d0479ad 100644
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -354,6 +354,8 @@ static int nfsd_inet6addr_event(struct notifier_block *this,
 		dprintk("nfsd_inet6addr_event: removed %pI6\n", &ifa->addr);
 		sin6.sin6_family = AF_INET6;
 		sin6.sin6_addr = ifa->addr;
+		if (ipv6_addr_type(&sin6.sin6_addr) & IPV6_ADDR_LINKLOCAL)
+			sin6.sin6_scope_id = ifa->idev->dev->ifindex;
 		svc_age_temp_xprts_now(nn->nfsd_serv, (struct sockaddr *)&sin6);
 	}
 
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 26c6fdb4bf67..2c132162796e 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -940,14 +940,12 @@ static int wait_for_concurrent_writes(struct file *file)
 __be32
 nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file,
 				loff_t offset, struct kvec *vec, int vlen,
-				unsigned long *cnt, int *stablep)
+				unsigned long *cnt, int stable)
 {
 	struct svc_export	*exp;
-	struct inode		*inode;
 	mm_segment_t		oldfs;
 	__be32			err = 0;
 	int			host_err;
-	int			stable = *stablep;
 	int			use_wgather;
 	loff_t			pos = offset;
 	unsigned int		pflags = current->flags;
@@ -962,13 +960,11 @@ nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file,
 		 */
 		current->flags |= PF_LESS_THROTTLE;
 
-	inode = file_inode(file);
-	exp   = fhp->fh_export;
-
+	exp = fhp->fh_export;
 	use_wgather = (rqstp->rq_vers == 2) && EX_WGATHER(exp);
 
 	if (!EX_ISSYNC(exp))
-		stable = 0;
+		stable = NFS_UNSTABLE;
 
 	if (stable && !use_wgather)
 		flags |= RWF_SYNC;
@@ -1035,35 +1031,22 @@ __be32 nfsd_read(struct svc_rqst *rqstp, struct svc_fh *fhp,
  * N.B. After this call fhp needs an fh_put
  */
 __be32
-nfsd_write(struct svc_rqst *rqstp, struct svc_fh *fhp, struct file *file,
-		loff_t offset, struct kvec *vec, int vlen, unsigned long *cnt,
-		int *stablep)
+nfsd_write(struct svc_rqst *rqstp, struct svc_fh *fhp, loff_t offset,
+	   struct kvec *vec, int vlen, unsigned long *cnt, int stable)
 {
-	__be32			err = 0;
+	struct file *file = NULL;
+	__be32 err = 0;
 
 	trace_write_start(rqstp, fhp, offset, vlen);
 
-	if (file) {
-		err = nfsd_permission(rqstp, fhp->fh_export, fhp->fh_dentry,
-				NFSD_MAY_WRITE|NFSD_MAY_OWNER_OVERRIDE);
-		if (err)
-			goto out;
-		trace_write_opened(rqstp, fhp, offset, vlen);
-		err = nfsd_vfs_write(rqstp, fhp, file, offset, vec, vlen, cnt,
-				stablep);
-		trace_write_io_done(rqstp, fhp, offset, vlen);
-	} else {
-		err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_WRITE, &file);
-		if (err)
-			goto out;
+	err = nfsd_open(rqstp, fhp, S_IFREG, NFSD_MAY_WRITE, &file);
+	if (err)
+		goto out;
 
-		trace_write_opened(rqstp, fhp, offset, vlen);
-		if (cnt)
-			err = nfsd_vfs_write(rqstp, fhp, file, offset, vec, vlen,
-					     cnt, stablep);
-		trace_write_io_done(rqstp, fhp, offset, vlen);
-		fput(file);
-	}
+	trace_write_opened(rqstp, fhp, offset, vlen);
+	err = nfsd_vfs_write(rqstp, fhp, file, offset, vec, vlen, cnt, stable);
+	trace_write_io_done(rqstp, fhp, offset, vlen);
+	fput(file);
 out:
 	trace_write_done(rqstp, fhp, offset, vlen);
 	return err;
diff --git a/fs/nfsd/vfs.h b/fs/nfsd/vfs.h
index 0bf9e7bf5800..db98c48c735a 100644
--- a/fs/nfsd/vfs.h
+++ b/fs/nfsd/vfs.h
@@ -83,12 +83,12 @@ __be32		nfsd_readv(struct file *, loff_t, struct kvec *, int,
 				unsigned long *);
 __be32 		nfsd_read(struct svc_rqst *, struct svc_fh *,
 				loff_t, struct kvec *, int, unsigned long *);
-__be32 		nfsd_write(struct svc_rqst *, struct svc_fh *,struct file *,
-				loff_t, struct kvec *,int, unsigned long *, int *);
+__be32 		nfsd_write(struct svc_rqst *, struct svc_fh *, loff_t,
+				struct kvec *, int, unsigned long *, int);
 __be32		nfsd_vfs_write(struct svc_rqst *rqstp, struct svc_fh *fhp,
 				struct file *file, loff_t offset,
 				struct kvec *vec, int vlen, unsigned long *cnt,
-				int *stablep);
+				int stable);
 __be32		nfsd_readlink(struct svc_rqst *, struct svc_fh *,
 				char *, int *);
 __be32		nfsd_symlink(struct svc_rqst *, struct svc_fh *,