1 /*
2 * GPL HEADER START
3 *
4 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it will be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
15 *
16 * You should have received a copy of the GNU General Public License
17 * version 2 along with this program; If not, see
18 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
19 *
20 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
21 * CA 95054 USA or visit www.sun.com if you need additional information or
22 * have any questions.
23 *
24 * GPL HEADER END
25 */
26 /*
27 * Copyright (c) 2003, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
29 *
30 * Copyright (c) 2012, Intel Corporation.
31 */
32 /*
33 * This file is part of Lustre, http://www.lustre.org/
34 * Lustre is a trademark of Sun Microsystems, Inc.
35 */
36
37 #ifndef _LUSTRE_CFG_H
38 #define _LUSTRE_CFG_H
39
40 /** \defgroup cfg cfg
41 *
42 * @{
43 */
44
45 /*
46 * 1cf6
47 * lcfG
48 */
49 #define LUSTRE_CFG_VERSION 0x1cf60001
50 #define LUSTRE_CFG_MAX_BUFCOUNT 8
51
52 #define LCFG_HDR_SIZE(count) \
53 cfs_size_round(offsetof (struct lustre_cfg, lcfg_buflens[(count)]))
54
55 /** If the LCFG_REQUIRED bit is set in a configuration command,
56 * then the client is required to understand this parameter
57 * in order to mount the filesystem. If it does not understand
58 * a REQUIRED command the client mount will fail. */
59 #define LCFG_REQUIRED 0x0001000
60
61 enum lcfg_command_type {
62 LCFG_ATTACH = 0x00cf001, /**< create a new obd instance */
63 LCFG_DETACH = 0x00cf002, /**< destroy obd instance */
64 LCFG_SETUP = 0x00cf003, /**< call type-specific setup */
65 LCFG_CLEANUP = 0x00cf004, /**< call type-specific cleanup */
66 LCFG_ADD_UUID = 0x00cf005, /**< add a nid to a niduuid */
67 LCFG_DEL_UUID = 0x00cf006, /**< remove a nid from a niduuid */
68 LCFG_MOUNTOPT = 0x00cf007, /**< create a profile (mdc, osc) */
69 LCFG_DEL_MOUNTOPT = 0x00cf008, /**< destroy a profile */
70 LCFG_SET_TIMEOUT = 0x00cf009, /**< set obd_timeout */
71 LCFG_SET_UPCALL = 0x00cf00a, /**< deprecated */
72 LCFG_ADD_CONN = 0x00cf00b, /**< add a failover niduuid to an obd */
73 LCFG_DEL_CONN = 0x00cf00c, /**< remove a failover niduuid */
74 LCFG_LOV_ADD_OBD = 0x00cf00d, /**< add an osc to a lov */
75 LCFG_LOV_DEL_OBD = 0x00cf00e, /**< remove an osc from a lov */
76 LCFG_PARAM = 0x00cf00f, /**< set a proc parameter */
77 LCFG_MARKER = 0x00cf010, /**< metadata about next cfg rec */
78 LCFG_LOG_START = 0x00ce011, /**< mgc only, process a cfg log */
79 LCFG_LOG_END = 0x00ce012, /**< stop processing updates */
80 LCFG_LOV_ADD_INA = 0x00ce013, /**< like LOV_ADD_OBD, inactive */
81 LCFG_ADD_MDC = 0x00cf014, /**< add an mdc to a lmv */
82 LCFG_DEL_MDC = 0x00cf015, /**< remove an mdc from a lmv */
83 LCFG_SPTLRPC_CONF = 0x00ce016, /**< security */
84 LCFG_POOL_NEW = 0x00ce020, /**< create an ost pool name */
85 LCFG_POOL_ADD = 0x00ce021, /**< add an ost to a pool */
86 LCFG_POOL_REM = 0x00ce022, /**< remove an ost from a pool */
87 LCFG_POOL_DEL = 0x00ce023, /**< destroy an ost pool name */
88 LCFG_SET_LDLM_TIMEOUT = 0x00ce030, /**< set ldlm_timeout */
89 LCFG_PRE_CLEANUP = 0x00cf031, /**< call type-specific pre
90 * cleanup cleanup */
91 LCFG_SET_PARAM = 0x00ce032, /**< use set_param syntax to set
92 *a proc parameters */
93 };
94
95 struct lustre_cfg_bufs {
96 void *lcfg_buf[LUSTRE_CFG_MAX_BUFCOUNT];
97 __u32 lcfg_buflen[LUSTRE_CFG_MAX_BUFCOUNT];
98 __u32 lcfg_bufcount;
99 };
100
101 struct lustre_cfg {
102 __u32 lcfg_version;
103 __u32 lcfg_command;
104
105 __u32 lcfg_num;
106 __u32 lcfg_flags;
107 __u64 lcfg_nid;
108 __u32 lcfg_nal; /* not used any more */
109
110 __u32 lcfg_bufcount;
111 __u32 lcfg_buflens[0];
112 };
113
114 enum cfg_record_type {
115 PORTALS_CFG_TYPE = 1,
116 LUSTRE_CFG_TYPE = 123,
117 };
118
119 #define LUSTRE_CFG_BUFLEN(lcfg, idx) \
120 ((lcfg)->lcfg_bufcount <= (idx) \
121 ? 0 \
122 : (lcfg)->lcfg_buflens[(idx)])
123
lustre_cfg_bufs_set(struct lustre_cfg_bufs * bufs,__u32 index,void * buf,__u32 buflen)124 static inline void lustre_cfg_bufs_set(struct lustre_cfg_bufs *bufs,
125 __u32 index,
126 void *buf,
127 __u32 buflen)
128 {
129 if (index >= LUSTRE_CFG_MAX_BUFCOUNT)
130 return;
131 if (bufs == NULL)
132 return;
133
134 if (bufs->lcfg_bufcount <= index)
135 bufs->lcfg_bufcount = index + 1;
136
137 bufs->lcfg_buf[index] = buf;
138 bufs->lcfg_buflen[index] = buflen;
139 }
140
lustre_cfg_bufs_set_string(struct lustre_cfg_bufs * bufs,__u32 index,char * str)141 static inline void lustre_cfg_bufs_set_string(struct lustre_cfg_bufs *bufs,
142 __u32 index,
143 char *str)
144 {
145 lustre_cfg_bufs_set(bufs, index, str, str ? strlen(str) + 1 : 0);
146 }
147
lustre_cfg_bufs_reset(struct lustre_cfg_bufs * bufs,char * name)148 static inline void lustre_cfg_bufs_reset(struct lustre_cfg_bufs *bufs, char *name)
149 {
150 memset((bufs), 0, sizeof(*bufs));
151 if (name)
152 lustre_cfg_bufs_set_string(bufs, 0, name);
153 }
154
lustre_cfg_buf(struct lustre_cfg * lcfg,int index)155 static inline void *lustre_cfg_buf(struct lustre_cfg *lcfg, int index)
156 {
157 int i;
158 int offset;
159 int bufcount;
160
161 LASSERT (lcfg != NULL);
162 LASSERT (index >= 0);
163
164 bufcount = lcfg->lcfg_bufcount;
165 if (index >= bufcount)
166 return NULL;
167
168 offset = LCFG_HDR_SIZE(lcfg->lcfg_bufcount);
169 for (i = 0; i < index; i++)
170 offset += cfs_size_round(lcfg->lcfg_buflens[i]);
171 return (char *)lcfg + offset;
172 }
173
lustre_cfg_bufs_init(struct lustre_cfg_bufs * bufs,struct lustre_cfg * lcfg)174 static inline void lustre_cfg_bufs_init(struct lustre_cfg_bufs *bufs,
175 struct lustre_cfg *lcfg)
176 {
177 int i;
178
179 bufs->lcfg_bufcount = lcfg->lcfg_bufcount;
180 for (i = 0; i < bufs->lcfg_bufcount; i++) {
181 bufs->lcfg_buflen[i] = lcfg->lcfg_buflens[i];
182 bufs->lcfg_buf[i] = lustre_cfg_buf(lcfg, i);
183 }
184 }
185
lustre_cfg_string(struct lustre_cfg * lcfg,int index)186 static inline char *lustre_cfg_string(struct lustre_cfg *lcfg, int index)
187 {
188 char *s;
189
190 if (lcfg->lcfg_buflens[index] == 0)
191 return NULL;
192
193 s = lustre_cfg_buf(lcfg, index);
194 if (s == NULL)
195 return NULL;
196
197 /*
198 * make sure it's NULL terminated, even if this kills a char
199 * of data. Try to use the padding first though.
200 */
201 if (s[lcfg->lcfg_buflens[index] - 1] != '\0') {
202 int last = min((int)lcfg->lcfg_buflens[index],
203 cfs_size_round(lcfg->lcfg_buflens[index]) - 1);
204 char lost = s[last];
205
206 s[last] = '\0';
207 if (lost != '\0') {
208 CWARN("Truncated buf %d to '%s' (lost '%c'...)\n",
209 index, s, lost);
210 }
211 }
212 return s;
213 }
214
lustre_cfg_len(__u32 bufcount,__u32 * buflens)215 static inline int lustre_cfg_len(__u32 bufcount, __u32 *buflens)
216 {
217 int i;
218 int len;
219
220 len = LCFG_HDR_SIZE(bufcount);
221 for (i = 0; i < bufcount; i++)
222 len += cfs_size_round(buflens[i]);
223
224 return cfs_size_round(len);
225 }
226
227 #include "obd_support.h"
228
lustre_cfg_new(int cmd,struct lustre_cfg_bufs * bufs)229 static inline struct lustre_cfg *lustre_cfg_new(int cmd,
230 struct lustre_cfg_bufs *bufs)
231 {
232 struct lustre_cfg *lcfg;
233 char *ptr;
234 int i;
235
236 lcfg = kzalloc(lustre_cfg_len(bufs->lcfg_bufcount, bufs->lcfg_buflen),
237 GFP_NOFS);
238 if (!lcfg)
239 return ERR_PTR(-ENOMEM);
240
241 lcfg->lcfg_version = LUSTRE_CFG_VERSION;
242 lcfg->lcfg_command = cmd;
243 lcfg->lcfg_bufcount = bufs->lcfg_bufcount;
244
245 ptr = (char *)lcfg + LCFG_HDR_SIZE(lcfg->lcfg_bufcount);
246 for (i = 0; i < lcfg->lcfg_bufcount; i++) {
247 lcfg->lcfg_buflens[i] = bufs->lcfg_buflen[i];
248 LOGL((char *)bufs->lcfg_buf[i], bufs->lcfg_buflen[i], ptr);
249 }
250 return lcfg;
251 }
252
lustre_cfg_free(struct lustre_cfg * lcfg)253 static inline void lustre_cfg_free(struct lustre_cfg *lcfg)
254 {
255 int len;
256
257 len = lustre_cfg_len(lcfg->lcfg_bufcount, lcfg->lcfg_buflens);
258
259 kfree(lcfg);
260 return;
261 }
262
lustre_cfg_sanity_check(void * buf,int len)263 static inline int lustre_cfg_sanity_check(void *buf, int len)
264 {
265 struct lustre_cfg *lcfg = (struct lustre_cfg *)buf;
266
267 if (!lcfg)
268 return -EINVAL;
269
270 /* check that the first bits of the struct are valid */
271 if (len < LCFG_HDR_SIZE(0))
272 return -EINVAL;
273
274 if (lcfg->lcfg_version != LUSTRE_CFG_VERSION)
275 return -EINVAL;
276
277 if (lcfg->lcfg_bufcount >= LUSTRE_CFG_MAX_BUFCOUNT)
278 return -EINVAL;
279
280 /* check that the buflens are valid */
281 if (len < LCFG_HDR_SIZE(lcfg->lcfg_bufcount))
282 return -EINVAL;
283
284 /* make sure all the pointers point inside the data */
285 if (len < lustre_cfg_len(lcfg->lcfg_bufcount, lcfg->lcfg_buflens))
286 return -EINVAL;
287
288 return 0;
289 }
290
291 #include "lustre/lustre_user.h"
292
293 /** @} cfg */
294
295 #endif /* _LUSTRE_CFG_H */
296