nfs_fha_new.c revision 256281 
1/*-
2 * Copyright (c) 2008 Isilon Inc http://www.isilon.com/
3 * Copyright (c) 2013 Spectra Logic Corporation
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27#include <sys/cdefs.h>
28__FBSDID("$FreeBSD: stable/10/sys/fs/nfsserver/nfs_fha_new.c 249596 2013-04-17 22:42:43Z ken $");
29
30#include <fs/nfs/nfsport.h>
31
32#include <rpc/rpc.h>
33#include <nfs/nfs_fha.h>
34#include <fs/nfs/xdr_subs.h>
35#include <fs/nfs/nfs.h>
36#include <fs/nfs/nfsproto.h>
37#include <fs/nfs/nfsm_subs.h>
38#include <fs/nfsserver/nfs_fha_new.h>
39
40static void fhanew_init(void *foo);
41static void fhanew_uninit(void *foo);
42rpcproc_t fhanew_get_procnum(rpcproc_t procnum);
43int fhanew_realign(struct mbuf **mb, int malloc_flags);
44int fhanew_get_fh(fhandle_t *fh, int v3, struct mbuf **md, caddr_t *dpos);
45int fhanew_is_read(rpcproc_t procnum);
46int fhanew_is_write(rpcproc_t procnum);
47int fhanew_get_offset(struct mbuf **md, caddr_t *dpos, int v3,
48		      struct fha_info *info);
49int fhanew_no_offset(rpcproc_t procnum);
50void fhanew_set_locktype(rpcproc_t procnum, struct fha_info *info);
51static int fhenew_stats_sysctl(SYSCTL_HANDLER_ARGS);
52
53static struct fha_params fhanew_softc;
54
55SYSCTL_DECL(_vfs_nfsd);
56
57extern int newnfs_nfsv3_procid[];
58extern SVCPOOL	*nfsrvd_pool;
59
60SYSINIT(nfs_fhanew, SI_SUB_ROOT_CONF, SI_ORDER_ANY, fhanew_init, NULL);
61SYSUNINIT(nfs_fhanew, SI_SUB_ROOT_CONF, SI_ORDER_ANY, fhanew_uninit, NULL);
62
63static void
64fhanew_init(void *foo)
65{
66	struct fha_params *softc;
67
68	softc = &fhanew_softc;
69
70	bzero(softc, sizeof(*softc));
71
72	/*
73	 * Setup the callbacks for this FHA personality.
74	 */
75	softc->callbacks.get_procnum = fhanew_get_procnum;
76	softc->callbacks.realign = fhanew_realign;
77	softc->callbacks.get_fh = fhanew_get_fh;
78	softc->callbacks.is_read = fhanew_is_read;
79	softc->callbacks.is_write = fhanew_is_write;
80	softc->callbacks.get_offset = fhanew_get_offset;
81	softc->callbacks.no_offset = fhanew_no_offset;
82	softc->callbacks.set_locktype = fhanew_set_locktype;
83	softc->callbacks.fhe_stats_sysctl = fhenew_stats_sysctl;
84
85	snprintf(softc->server_name, sizeof(softc->server_name),
86	    FHANEW_SERVER_NAME);
87
88	softc->pool = &nfsrvd_pool;
89
90	/*
91	 * Initialize the sysctl context list for the fha module.
92	 */
93	sysctl_ctx_init(&softc->sysctl_ctx);
94	softc->sysctl_tree = SYSCTL_ADD_NODE(&softc->sysctl_ctx,
95	    SYSCTL_STATIC_CHILDREN(_vfs_nfsd), OID_AUTO, "fha", CTLFLAG_RD,
96	    0, "fha node");
97	if (softc->sysctl_tree == NULL) {
98		printf("%s: unable to allocate sysctl tree\n", __func__);
99		return;
100	}
101
102	fha_init(softc);
103}
104
105static void
106fhanew_uninit(void *foo)
107{
108	struct fha_params *softc;
109
110	softc = &fhanew_softc;
111
112	fha_uninit(softc);
113}
114
115rpcproc_t
116fhanew_get_procnum(rpcproc_t procnum)
117{
118	if (procnum > NFSV2PROC_STATFS)
119		return (-1);
120
121	return (newnfs_nfsv3_procid[procnum]);
122}
123
124int
125fhanew_realign(struct mbuf **mb, int malloc_flags)
126{
127	return (newnfs_realign(mb, malloc_flags));
128}
129
130int
131fhanew_get_fh(fhandle_t *fh, int v3, struct mbuf **md, caddr_t *dpos)
132{
133	struct nfsrv_descript lnd, *nd;
134	uint32_t *tl;
135	int error, len;
136
137	error = 0;
138	len = 0;
139	nd = &lnd;
140
141	nd->nd_md = *md;
142	nd->nd_dpos = *dpos;
143
144	if (v3) {
145		NFSM_DISSECT_NONBLOCK(tl, uint32_t *, NFSX_UNSIGNED);
146		if ((len = fxdr_unsigned(int, *tl)) <= 0 || len > NFSX_FHMAX) {
147			error = EBADRPC;
148			goto nfsmout;
149		}
150	} else {
151		len = NFSX_V2FH;
152	}
153
154	if (len != 0) {
155		NFSM_DISSECT_NONBLOCK(tl, uint32_t *, len);
156		bcopy(tl, fh, len);
157	} else
158		bzero(fh, sizeof(*fh));
159
160nfsmout:
161	*md = nd->nd_md;
162	*dpos = nd->nd_dpos;
163
164	return (error);
165}
166
167int
168fhanew_is_read(rpcproc_t procnum)
169{
170	if (procnum == NFSPROC_READ)
171		return (1);
172	else
173		return (0);
174}
175
176int
177fhanew_is_write(rpcproc_t procnum)
178{
179	if (procnum == NFSPROC_WRITE)
180		return (1);
181	else
182		return (0);
183}
184
185int
186fhanew_get_offset(struct mbuf **md, caddr_t *dpos, int v3,
187		  struct fha_info *info)
188{
189	struct nfsrv_descript lnd, *nd;
190	uint32_t *tl;
191	int error;
192
193	error = 0;
194
195	nd = &lnd;
196	nd->nd_md = *md;
197	nd->nd_dpos = *dpos;
198
199	if (v3) {
200		NFSM_DISSECT_NONBLOCK(tl, uint32_t *, 2 * NFSX_UNSIGNED);
201		info->offset = fxdr_hyper(tl);
202	} else {
203		NFSM_DISSECT_NONBLOCK(tl, uint32_t *, NFSX_UNSIGNED);
204		info->offset = fxdr_unsigned(uint32_t, *tl);
205	}
206
207nfsmout:
208	*md = nd->nd_md;
209	*dpos = nd->nd_dpos;
210
211	return (error);
212}
213
214int
215fhanew_no_offset(rpcproc_t procnum)
216{
217	if (procnum == NFSPROC_FSSTAT ||
218	    procnum == NFSPROC_FSINFO ||
219	    procnum == NFSPROC_PATHCONF ||
220	    procnum == NFSPROC_NOOP ||
221	    procnum == NFSPROC_NULL)
222		return (1);
223	else
224		return (0);
225}
226
227void
228fhanew_set_locktype(rpcproc_t procnum, struct fha_info *info)
229{
230	switch (procnum) {
231	case NFSPROC_NULL:
232	case NFSPROC_GETATTR:
233	case NFSPROC_LOOKUP:
234	case NFSPROC_ACCESS:
235	case NFSPROC_READLINK:
236	case NFSPROC_READ:
237	case NFSPROC_READDIR:
238	case NFSPROC_READDIRPLUS:
239	case NFSPROC_WRITE:
240		info->locktype = LK_SHARED;
241		break;
242	case NFSPROC_SETATTR:
243	case NFSPROC_CREATE:
244	case NFSPROC_MKDIR:
245	case NFSPROC_SYMLINK:
246	case NFSPROC_MKNOD:
247	case NFSPROC_REMOVE:
248	case NFSPROC_RMDIR:
249	case NFSPROC_RENAME:
250	case NFSPROC_LINK:
251	case NFSPROC_FSSTAT:
252	case NFSPROC_FSINFO:
253	case NFSPROC_PATHCONF:
254	case NFSPROC_COMMIT:
255	case NFSPROC_NOOP:
256		info->locktype = LK_EXCLUSIVE;
257		break;
258	}
259}
260
261static int
262fhenew_stats_sysctl(SYSCTL_HANDLER_ARGS)
263{
264	return (fhe_stats_sysctl(oidp, arg1, arg2, req, &fhanew_softc));
265}
266
267
268SVCTHREAD *
269fhanew_assign(SVCTHREAD *this_thread, struct svc_req *req)
270{
271	return (fha_assign(this_thread, req, &fhanew_softc));
272}
273