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Commit 5a5ea0d4 authored by Bryan Schumaker's avatar Bryan Schumaker Committed by Trond Myklebust
Browse files

NFS: Add secinfo procedure 



This patch adds the nfs4 operation secinfo as a
valid nfs rpc operation.

Signed-off-by: default avatarBryan Schumaker <bjschuma@netapp.com>
Signed-off-by: default avatarTrond Myklebust <Trond.Myklebust@netapp.com>
parent 7c513058

fs/nfs/nfs4proc.c

+35 −0
Original line number Diff line number Diff line
@@ -4639,6 +4639,40 @@ int nfs4_proc_fs_locations(struct inode *dir, const struct qstr *name, 
	return status;

}



static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)

{

	int status;

	struct nfs4_secinfo_arg args = {

		.dir_fh = NFS_FH(dir),

		.name   = name,

	};

	struct nfs4_secinfo_res res = {

		.flavors     = flavors,

	};

	struct rpc_message msg = {

		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],

		.rpc_argp = &args,

		.rpc_resp = &res,

	};



	dprintk("NFS call  secinfo %s\n", name->name);

	status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);

	dprintk("NFS reply  secinfo: %d\n", status);

	return status;

}



int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors)

{

	struct nfs4_exception exception = { };

	int err;

	do {

		err = nfs4_handle_exception(NFS_SERVER(dir),

				_nfs4_proc_secinfo(dir, name, flavors),

				&exception);

	} while (exception.retry);

	return err;

}



#ifdef CONFIG_NFS_V4_1

/*

 * Check the exchange flags returned by the server for invalid flags, having
@@ -5756,6 +5790,7 @@ const struct nfs_rpc_ops nfs_v4_clientops = { 
	.close_context  = nfs4_close_context,

	.open_context	= nfs4_atomic_open,

	.init_client	= nfs4_init_client,

	.secinfo	= nfs4_proc_secinfo,

};



static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {

fs/nfs/nfs4xdr.c

+135 −0
Original line number Diff line number Diff line
@@ -46,6 +46,7 @@ 
#include <linux/kdev_t.h>

#include <linux/sunrpc/clnt.h>

#include <linux/sunrpc/msg_prot.h>

#include <linux/sunrpc/gss_api.h>

#include <linux/nfs.h>

#include <linux/nfs4.h>

#include <linux/nfs_fs.h>
@@ -253,6 +254,8 @@ static int nfs4_stat_to_errno(int); 
				(encode_getattr_maxsz)

#define decode_fs_locations_maxsz \

				(0)

#define encode_secinfo_maxsz	(op_encode_hdr_maxsz + nfs4_name_maxsz)

#define decode_secinfo_maxsz	(op_decode_hdr_maxsz + 4 + (NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)))



#if defined(CONFIG_NFS_V4_1)

#define NFS4_MAX_MACHINE_NAME_LEN (64)
@@ -676,6 +679,14 @@ static int nfs4_stat_to_errno(int); 
				 decode_putfh_maxsz + \

				 decode_lookup_maxsz + \

				 decode_fs_locations_maxsz)

#define NFS4_enc_secinfo_sz 	(compound_encode_hdr_maxsz + \

				encode_sequence_maxsz + \

				encode_putfh_maxsz + \

				encode_secinfo_maxsz)

#define NFS4_dec_secinfo_sz	(compound_decode_hdr_maxsz + \

				decode_sequence_maxsz + \

				decode_putfh_maxsz + \

				decode_secinfo_maxsz)

#if defined(CONFIG_NFS_V4_1)

#define NFS4_enc_exchange_id_sz \

				(compound_encode_hdr_maxsz + \
@@ -1620,6 +1631,18 @@ static void encode_delegreturn(struct xdr_stream *xdr, const nfs4_stateid *state 
	hdr->replen += decode_delegreturn_maxsz;

}



static void encode_secinfo(struct xdr_stream *xdr, const struct qstr *name, struct compound_hdr *hdr)

{

	int len = name->len;

	__be32 *p;



	p = reserve_space(xdr, 8 + len);

	*p++ = cpu_to_be32(OP_SECINFO);

	xdr_encode_opaque(p, name->name, len);

	hdr->nops++;

	hdr->replen += decode_secinfo_maxsz;

}



#if defined(CONFIG_NFS_V4_1)

/* NFSv4.1 operations */

static void encode_exchange_id(struct xdr_stream *xdr,
@@ -2465,6 +2488,24 @@ static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req, 
	encode_nops(&hdr);

}



/*

 * Encode SECINFO request

 */

static void nfs4_xdr_enc_secinfo(struct rpc_rqst *req,

				struct xdr_stream *xdr,

				struct nfs4_secinfo_arg *args)

{

	struct compound_hdr hdr = {

		.minorversion = nfs4_xdr_minorversion(&args->seq_args),

	};



	encode_compound_hdr(xdr, req, &hdr);

	encode_sequence(xdr, &args->seq_args, &hdr);

	encode_putfh(xdr, args->dir_fh, &hdr);

	encode_secinfo(xdr, args->name, &hdr);

	encode_nops(&hdr);

}



#if defined(CONFIG_NFS_V4_1)

/*

 * EXCHANGE_ID request
@@ -4680,6 +4721,73 @@ static int decode_delegreturn(struct xdr_stream *xdr) 
	return decode_op_hdr(xdr, OP_DELEGRETURN);

}



static int decode_secinfo_gss(struct xdr_stream *xdr, struct nfs4_secinfo_flavor *flavor)

{

	__be32 *p;



	p = xdr_inline_decode(xdr, 4);

	if (unlikely(!p))

		goto out_overflow;

	flavor->gss.sec_oid4.len = be32_to_cpup(p);

	if (flavor->gss.sec_oid4.len > GSS_OID_MAX_LEN)

		goto out_err;



	p = xdr_inline_decode(xdr, flavor->gss.sec_oid4.len);

	if (unlikely(!p))

		goto out_overflow;

	memcpy(flavor->gss.sec_oid4.data, p, flavor->gss.sec_oid4.len);



	p = xdr_inline_decode(xdr, 8);

	if (unlikely(!p))

		goto out_overflow;

	flavor->gss.qop4 = be32_to_cpup(p++);

	flavor->gss.service = be32_to_cpup(p);



	return 0;



out_overflow:

	print_overflow_msg(__func__, xdr);

	return -EIO;

out_err:

	return -EINVAL;

}



static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)

{

	struct nfs4_secinfo_flavor *sec_flavor;

	int status;

	__be32 *p;

	int i;



	status = decode_op_hdr(xdr, OP_SECINFO);

	p = xdr_inline_decode(xdr, 4);

	if (unlikely(!p))

		goto out_overflow;

	res->flavors->num_flavors = be32_to_cpup(p);



	for (i = 0; i < res->flavors->num_flavors; i++) {

		sec_flavor = &res->flavors->flavors[i];

		if ((char *)&sec_flavor[1] - (char *)res > PAGE_SIZE)

			break;



		p = xdr_inline_decode(xdr, 4);

		if (unlikely(!p))

			goto out_overflow;

		sec_flavor->flavor = be32_to_cpup(p);



		if (sec_flavor->flavor == RPC_AUTH_GSS) {

			if (decode_secinfo_gss(xdr, sec_flavor))

				break;

		}

	}



	return 0;



out_overflow:

	print_overflow_msg(__func__, xdr);

	return -EIO;

}



#if defined(CONFIG_NFS_V4_1)

static int decode_exchange_id(struct xdr_stream *xdr,

			      struct nfs41_exchange_id_res *res)
@@ -5919,6 +6027,32 @@ static int nfs4_xdr_dec_fs_locations(struct rpc_rqst *req, 
	return status;

}



/*

 * Decode SECINFO response

 */

static int nfs4_xdr_dec_secinfo(struct rpc_rqst *rqstp,

				struct xdr_stream *xdr,

				struct nfs4_secinfo_res *res)

{

	struct compound_hdr hdr;

	int status;



	status = decode_compound_hdr(xdr, &hdr);

	if (status)

		goto out;

	status = decode_sequence(xdr, &res->seq_res, rqstp);

	if (status)

		goto out;

	status = decode_putfh(xdr);

	if (status)

		goto out;

	status = decode_secinfo(xdr, res);

	if (status)

		goto out;

out:

	return status;

}



#if defined(CONFIG_NFS_V4_1)

/*

 * Decode EXCHANGE_ID response
@@ -6258,6 +6392,7 @@ struct rpc_procinfo nfs4_procedures[] = { 
	PROC(SETACL,		enc_setacl,		dec_setacl),

	PROC(FS_LOCATIONS,	enc_fs_locations,	dec_fs_locations),

	PROC(RELEASE_LOCKOWNER,	enc_release_lockowner,	dec_release_lockowner),

	PROC(SECINFO,		enc_secinfo,		dec_secinfo),

#if defined(CONFIG_NFS_V4_1)

	PROC(EXCHANGE_ID,	enc_exchange_id,	dec_exchange_id),

	PROC(CREATE_SESSION,	enc_create_session,	dec_create_session),

include/linux/nfs4.h

+1 −0
Original line number Diff line number Diff line
@@ -550,6 +550,7 @@ enum { 
	NFSPROC4_CLNT_SETACL,

	NFSPROC4_CLNT_FS_LOCATIONS,

	NFSPROC4_CLNT_RELEASE_LOCKOWNER,

	NFSPROC4_CLNT_SECINFO,



	/* nfs41 */

	NFSPROC4_CLNT_EXCHANGE_ID,

include/linux/nfs_xdr.h

+37 −0
Original line number Diff line number Diff line
@@ -3,6 +3,7 @@ 


#include <linux/nfsacl.h>

#include <linux/nfs3.h>

#include <linux/sunrpc/gss_api.h>



/*

 * To change the maximum rsize and wsize supported by the NFS client, adjust
@@ -14,6 +15,9 @@ 
#define NFS_DEF_FILE_IO_SIZE	(4096U)

#define NFS_MIN_FILE_IO_SIZE	(1024U)



/* Forward declaration for NFS v3 */

struct nfs4_secinfo_flavors;



struct nfs_fsid {

	uint64_t		major;

	uint64_t		minor;
@@ -936,6 +940,38 @@ struct nfs4_fs_locations_res { 
	struct nfs4_sequence_res	seq_res;

};



struct nfs4_secinfo_oid {

	unsigned int len;

	char data[GSS_OID_MAX_LEN];

};



struct nfs4_secinfo_gss {

	struct nfs4_secinfo_oid sec_oid4;

	unsigned int qop4;

	unsigned int service;

};



struct nfs4_secinfo_flavor {

	unsigned int 		flavor;

	struct nfs4_secinfo_gss	gss;

};



struct nfs4_secinfo_flavors {

	unsigned int num_flavors;

	struct nfs4_secinfo_flavor flavors[0];

};



struct nfs4_secinfo_arg {

	const struct nfs_fh		*dir_fh;

	const struct qstr		*name;

	struct nfs4_sequence_args	seq_args;

};



struct nfs4_secinfo_res {

	struct nfs4_secinfo_flavors	*flavors;

	struct nfs4_sequence_res	seq_res;

};



#endif /* CONFIG_NFS_V4 */



struct nfstime4 {
@@ -1118,6 +1154,7 @@ struct nfs_rpc_ops { 
				struct iattr *iattr);

	int	(*init_client) (struct nfs_client *, const struct rpc_timeout *,

				const char *, rpc_authflavor_t, int);

	int	(*secinfo)(struct inode *, const struct qstr *, struct nfs4_secinfo_flavors *);

};



/*