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drivers: staging: lustre: Fix 'do not use C99 // comments' errors
[deliverable/linux.git] / drivers / staging / lustre / lustre / include / lustre_disk.h
CommitLineData
d7e09d03
PT		 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) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
28 * Use is subject to license terms.
29 *
30 * Copyright (c) 2011, 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 * lustre/include/lustre_disk.h
37 *
38 * Lustre disk format definitions.
39 *
40 * Author: Nathan Rutman <nathan@clusterfs.com>
41 */
42
43#ifndef _LUSTRE_DISK_H
44#define _LUSTRE_DISK_H
45
46/** \defgroup disk disk
47 *
48 * @{
49 */
50
9fdaf8c0
GKH		 51#include "../../include/linux/libcfs/libcfs.h"
52#include "../../include/linux/lnet/types.h"
ac550511 53#include <linux/backing-dev.h>
d7e09d03
PT		 54
55/****************** on-disk files *********************/
56
99a92265 57#define MDT_LOGS_DIR "LOGS" /* COMPAT_146 */
58#define MOUNT_CONFIGS_DIR "CONFIGS"
59#define CONFIGS_FILE "mountdata"
d7e09d03 60/** Persistent mount data are stored on the disk in this file. */
99a92265 61#define MOUNT_DATA_FILE MOUNT_CONFIGS_DIR"/"CONFIGS_FILE
62#define LAST_RCVD "last_rcvd"
63#define LOV_OBJID "lov_objid"
d7e09d03 64#define LOV_OBJSEQ "lov_objseq"
99a92265 65#define HEALTH_CHECK "health_check"
66#define CAPA_KEYS "capa_keys"
67#define CHANGELOG_USERS "changelog_users"
68#define MGS_NIDTBL_DIR "NIDTBL_VERSIONS"
69#define QMT_DIR "quota_master"
70#define QSD_DIR "quota_slave"
71#define HSM_ACTIONS "hsm_actions"
d7e09d03
PT		 72
73/****************** persistent mount data *********************/
74
75#define LDD_F_SV_TYPE_MDT 0x0001
76#define LDD_F_SV_TYPE_OST 0x0002
77#define LDD_F_SV_TYPE_MGS 0x0004
78#define LDD_F_SV_TYPE_MASK (LDD_F_SV_TYPE_MDT | \
79 LDD_F_SV_TYPE_OST | \
80 LDD_F_SV_TYPE_MGS)
81#define LDD_F_SV_ALL 0x0008
82/** need an index assignment */
83#define LDD_F_NEED_INDEX 0x0010
84/** never registered */
85#define LDD_F_VIRGIN 0x0020
86/** update the config logs for this server */
87#define LDD_F_UPDATE 0x0040
88/** rewrite the LDD */
89#define LDD_F_REWRITE_LDD 0x0080
90/** regenerate config logs for this fs or server */
91#define LDD_F_WRITECONF 0x0100
92/** COMPAT_14 */
93#define LDD_F_UPGRADE14 0x0200
94/** process as lctl conf_param */
95#define LDD_F_PARAM 0x0400
96/** all nodes are specified as service nodes */
97#define LDD_F_NO_PRIMNODE 0x1000
98/** IR enable flag */
99#define LDD_F_IR_CAPABLE 0x2000
100/** the MGS refused to register the target. */
101#define LDD_F_ERROR 0x4000
7d4bae45
AB		 102/** process at lctl conf_param */
103#define LDD_F_PARAM2 0x8000
d7e09d03
PT		 104
105/* opc for target register */
106#define LDD_F_OPC_REG 0x10000000
107#define LDD_F_OPC_UNREG 0x20000000
108#define LDD_F_OPC_READY 0x40000000
109#define LDD_F_OPC_MASK 0xf0000000
110
111#define LDD_F_ONDISK_MASK (LDD_F_SV_TYPE_MASK)
112
113#define LDD_F_MASK 0xFFFF
114
115enum ldd_mount_type {
116 LDD_MT_EXT3 = 0,
117 LDD_MT_LDISKFS,
118 LDD_MT_SMFS,
119 LDD_MT_REISERFS,
120 LDD_MT_LDISKFS2,
121 LDD_MT_ZFS,
122 LDD_MT_LAST
123};
124
125static inline char *mt_str(enum ldd_mount_type mt)
126{
127 static char *mount_type_string[] = {
128 "ext3",
129 "ldiskfs",
130 "smfs",
131 "reiserfs",
132 "ldiskfs2",
133 "zfs",
134 };
135 return mount_type_string[mt];
136}
137
138static inline char *mt_type(enum ldd_mount_type mt)
139{
140 static char *mount_type_string[] = {
141 "osd-ldiskfs",
142 "osd-ldiskfs",
143 "osd-smfs",
144 "osd-reiserfs",
145 "osd-ldiskfs",
146 "osd-zfs",
147 };
148 return mount_type_string[mt];
149}
150
151#define LDD_INCOMPAT_SUPP 0
152#define LDD_ROCOMPAT_SUPP 0
153
154#define LDD_MAGIC 0x1dd00001
155
156/* On-disk configuration file. In host-endian order. */
157struct lustre_disk_data {
158 __u32 ldd_magic;
159 __u32 ldd_feature_compat; /* compatible feature flags */
160 __u32 ldd_feature_rocompat;/* read-only compatible feature flags */
161 __u32 ldd_feature_incompat;/* incompatible feature flags */
162
163 __u32 ldd_config_ver; /* config rewrite count - not used */
164 __u32 ldd_flags; /* LDD_SV_TYPE */
165 __u32 ldd_svindex; /* server index (0001), must match
166 svname */
167 __u32 ldd_mount_type; /* target fs type LDD_MT_* */
168 char ldd_fsname[64]; /* filesystem this server is part of,
169 MTI_NAME_MAXLEN */
170 char ldd_svname[64]; /* this server's name (lustre-mdt0001)*/
171 __u8 ldd_uuid[40]; /* server UUID (COMPAT_146) */
172
173/*200*/ char ldd_userdata[1024 - 200]; /* arbitrary user string */
174/*1024*/__u8 ldd_padding[4096 - 1024];
175/*4096*/char ldd_mount_opts[4096]; /* target fs mount opts */
176/*8192*/char ldd_params[4096]; /* key=value pairs */
177};
178
179
180#define IS_MDT(data) ((data)->lsi_flags & LDD_F_SV_TYPE_MDT)
181#define IS_OST(data) ((data)->lsi_flags & LDD_F_SV_TYPE_OST)
182#define IS_MGS(data) ((data)->lsi_flags & LDD_F_SV_TYPE_MGS)
183#define IS_SERVER(data) ((data)->lsi_flags & (LDD_F_SV_TYPE_MGS | \
184 LDD_F_SV_TYPE_MDT | LDD_F_SV_TYPE_OST))
185#define MT_STR(data) mt_str((data)->ldd_mount_type)
186
187/* Make the mdt/ost server obd name based on the filesystem name */
188static inline int server_make_name(__u32 flags, __u16 index, char *fs,
189 char *name)
190{
191 if (flags & (LDD_F_SV_TYPE_MDT | LDD_F_SV_TYPE_OST)) {
192 if (!(flags & LDD_F_SV_ALL))
193 sprintf(name, "%.8s%c%s%04x", fs,
194 (flags & LDD_F_VIRGIN) ? ':' :
195 ((flags & LDD_F_WRITECONF) ? '=' : '-'),
196 (flags & LDD_F_SV_TYPE_MDT) ? "MDT" : "OST",
197 index);
198 } else if (flags & LDD_F_SV_TYPE_MGS) {
199 sprintf(name, "MGS");
200 } else {
201 CERROR("unknown server type %#x\n", flags);
202 return 1;
203 }
204 return 0;
205}
206
207/****************** mount command *********************/
208
209/* The lmd is only used internally by Lustre; mount simply passes
210 everything as string options */
211
212#define LMD_MAGIC 0xbdacbd03
213
214/* gleaned from the mount command - no persistent info here */
215struct lustre_mount_data {
216 __u32 lmd_magic;
217 __u32 lmd_flags; /* lustre mount flags */
218 int lmd_mgs_failnodes; /* mgs failover node count */
219 int lmd_exclude_count;
220 int lmd_recovery_time_soft;
221 int lmd_recovery_time_hard;
222 char *lmd_dev; /* device name */
223 char *lmd_profile; /* client only */
224 char *lmd_mgssec; /* sptlrpc flavor to mgs */
225 char *lmd_opts; /* lustre mount options (as opposed to
226 _device_ mount options) */
227 char *lmd_params; /* lustre params */
228 __u32 *lmd_exclude; /* array of OSTs to ignore */
229 char *lmd_mgs; /* MGS nid */
230 char *lmd_osd_type; /* OSD type */
231};
232
99a92265 233#define LMD_FLG_SERVER 0x0001 /* Mounting a server */
234#define LMD_FLG_CLIENT 0x0002 /* Mounting a client */
235#define LMD_FLG_ABORT_RECOV 0x0008 /* Abort recovery */
236#define LMD_FLG_NOSVC 0x0010 /* Only start MGS/MGC for servers,
237 no other services */
238#define LMD_FLG_NOMGS 0x0020 /* Only start target for servers, reusing
239 existing MGS services */
240#define LMD_FLG_WRITECONF 0x0040 /* Rewrite config log */
241#define LMD_FLG_NOIR 0x0080 /* NO imperative recovery */
242#define LMD_FLG_NOSCRUB 0x0100 /* Do not trigger scrub automatically */
243#define LMD_FLG_MGS 0x0200 /* Also start MGS along with server */
244#define LMD_FLG_IAM 0x0400 /* IAM dir */
245#define LMD_FLG_NO_PRIMNODE 0x0800 /* all nodes are service nodes */
246#define LMD_FLG_VIRGIN 0x1000 /* the service registers first time */
247#define LMD_FLG_UPDATE 0x2000 /* update parameters */
248#define LMD_FLG_HSM 0x4000 /* Start coordinator */
d7e09d03
PT		 249
250#define lmd_is_client(x) ((x)->lmd_flags & LMD_FLG_CLIENT)
251
252
253/****************** last_rcvd file *********************/
254
255/** version recovery epoch */
256#define LR_EPOCH_BITS 32
257#define lr_epoch(a) ((a) >> LR_EPOCH_BITS)
258#define LR_EXPIRE_INTERVALS 16 /**< number of intervals to track transno */
259#define ENOENT_VERSION 1 /** 'virtual' version of non-existent object */
260
261#define LR_SERVER_SIZE 512
262#define LR_CLIENT_START 8192
263#define LR_CLIENT_SIZE 128
264#if LR_CLIENT_START < LR_SERVER_SIZE
265#error "Can't have LR_CLIENT_START < LR_SERVER_SIZE"
266#endif
267
268/*
269 * This limit is arbitrary (131072 clients on x86), but it is convenient to use
270 * 2^n * PAGE_CACHE_SIZE * 8 for the number of bits that fit an order-n allocation.
271 * If we need more than 131072 clients (order-2 allocation on x86) then this
272 * should become an array of single-page pointers that are allocated on demand.
273 */
274#if (128 * 1024UL) > (PAGE_CACHE_SIZE * 8)
275#define LR_MAX_CLIENTS (128 * 1024UL)
276#else
277#define LR_MAX_CLIENTS (PAGE_CACHE_SIZE * 8)
278#endif
279
280/** COMPAT_146: this is an OST (temporary) */
281#define OBD_COMPAT_OST 0x00000002
282/** COMPAT_146: this is an MDT (temporary) */
283#define OBD_COMPAT_MDT 0x00000004
284/** 2.0 server, interop flag to show server version is changed */
285#define OBD_COMPAT_20 0x00000008
286
287/** MDS handles LOV_OBJID file */
288#define OBD_ROCOMPAT_LOVOBJID 0x00000001
289
290/** OST handles group subdirs */
291#define OBD_INCOMPAT_GROUPS 0x00000001
292/** this is an OST */
293#define OBD_INCOMPAT_OST 0x00000002
294/** this is an MDT */
295#define OBD_INCOMPAT_MDT 0x00000004
296/** common last_rvcd format */
297#define OBD_INCOMPAT_COMMON_LR 0x00000008
298/** FID is enabled */
299#define OBD_INCOMPAT_FID 0x00000010
300/** Size-on-MDS is enabled */
301#define OBD_INCOMPAT_SOM 0x00000020
302/** filesystem using iam format to store directory entries */
303#define OBD_INCOMPAT_IAM_DIR 0x00000040
304/** LMA attribute contains per-inode incompatible flags */
305#define OBD_INCOMPAT_LMA 0x00000080
306/** lmm_stripe_count has been shrunk from __u32 to __u16 and the remaining 16
307 * bits are now used to store a generation. Once we start changing the layout
308 * and bumping the generation, old versions expecting a 32-bit lmm_stripe_count
309 * will be confused by interpreting stripe_count | gen << 16 as the actual
310 * stripe count */
311#define OBD_INCOMPAT_LMM_VER 0x00000100
312/** multiple OI files for MDT */
313#define OBD_INCOMPAT_MULTI_OI 0x00000200
314
315/* Data stored per server at the head of the last_rcvd file. In le32 order.
316 This should be common to filter_internal.h, lustre_mds.h */
317struct lr_server_data {
318 __u8 lsd_uuid[40]; /* server UUID */
319 __u64 lsd_last_transno; /* last completed transaction ID */
320 __u64 lsd_compat14; /* reserved - compat with old last_rcvd */
321 __u64 lsd_mount_count; /* incarnation number */
322 __u32 lsd_feature_compat; /* compatible feature flags */
323 __u32 lsd_feature_rocompat;/* read-only compatible feature flags */
324 __u32 lsd_feature_incompat;/* incompatible feature flags */
325 __u32 lsd_server_size; /* size of server data area */
326 __u32 lsd_client_start; /* start of per-client data area */
327 __u16 lsd_client_size; /* size of per-client data area */
328 __u16 lsd_subdir_count; /* number of subdirectories for objects */
329 __u64 lsd_catalog_oid; /* recovery catalog object id */
330 __u32 lsd_catalog_ogen; /* recovery catalog inode generation */
331 __u8 lsd_peeruuid[40]; /* UUID of MDS associated with this OST */
332 __u32 lsd_osd_index; /* index number of OST in LOV */
333 __u32 lsd_padding1; /* was lsd_mdt_index, unused in 2.4.0 */
334 __u32 lsd_start_epoch; /* VBR: start epoch from last boot */
335 /** transaction values since lsd_trans_table_time */
336 __u64 lsd_trans_table[LR_EXPIRE_INTERVALS];
337 /** start point of transno table below */
338 __u32 lsd_trans_table_time; /* time of first slot in table above */
339 __u32 lsd_expire_intervals; /* LR_EXPIRE_INTERVALS */
340 __u8 lsd_padding[LR_SERVER_SIZE - 288];
341};
342
343/* Data stored per client in the last_rcvd file. In le32 order. */
344struct lsd_client_data {
345 __u8 lcd_uuid[40]; /* client UUID */
346 __u64 lcd_last_transno; /* last completed transaction ID */
347 __u64 lcd_last_xid; /* xid for the last transaction */
348 __u32 lcd_last_result; /* result from last RPC */
349 __u32 lcd_last_data; /* per-op data (disposition for open &c.) */
350 /* for MDS_CLOSE requests */
351 __u64 lcd_last_close_transno; /* last completed transaction ID */
352 __u64 lcd_last_close_xid; /* xid for the last transaction */
353 __u32 lcd_last_close_result; /* result from last RPC */
354 __u32 lcd_last_close_data; /* per-op data */
355 /* VBR: last versions */
356 __u64 lcd_pre_versions[4];
357 __u32 lcd_last_epoch;
358 /** orphans handling for delayed export rely on that */
359 __u32 lcd_first_epoch;
360 __u8 lcd_padding[LR_CLIENT_SIZE - 128];
361};
362
363/* bug20354: the lcd_uuid for export of clients may be wrong */
364static inline void check_lcd(char *obd_name, int index,
365 struct lsd_client_data *lcd)
366{
367 int length = sizeof(lcd->lcd_uuid);
368 if (strnlen((char*)lcd->lcd_uuid, length) == length) {
369 lcd->lcd_uuid[length - 1] = '\0';
370
371 LCONSOLE_ERROR("the client UUID (%s) on %s for exports"
372 "stored in last_rcvd(index = %d) is bad!\n",
373 lcd->lcd_uuid, obd_name, index);
374 }
375}
376
377/* last_rcvd handling */
378static inline void lsd_le_to_cpu(struct lr_server_data *buf,
379 struct lr_server_data *lsd)
380{
381 int i;
382 memcpy(lsd->lsd_uuid, buf->lsd_uuid, sizeof(lsd->lsd_uuid));
383 lsd->lsd_last_transno = le64_to_cpu(buf->lsd_last_transno);
384 lsd->lsd_compat14 = le64_to_cpu(buf->lsd_compat14);
385 lsd->lsd_mount_count = le64_to_cpu(buf->lsd_mount_count);
386 lsd->lsd_feature_compat = le32_to_cpu(buf->lsd_feature_compat);
387 lsd->lsd_feature_rocompat = le32_to_cpu(buf->lsd_feature_rocompat);
388 lsd->lsd_feature_incompat = le32_to_cpu(buf->lsd_feature_incompat);
389 lsd->lsd_server_size = le32_to_cpu(buf->lsd_server_size);
390 lsd->lsd_client_start = le32_to_cpu(buf->lsd_client_start);
391 lsd->lsd_client_size = le16_to_cpu(buf->lsd_client_size);
392 lsd->lsd_subdir_count = le16_to_cpu(buf->lsd_subdir_count);
393 lsd->lsd_catalog_oid = le64_to_cpu(buf->lsd_catalog_oid);
394 lsd->lsd_catalog_ogen = le32_to_cpu(buf->lsd_catalog_ogen);
395 memcpy(lsd->lsd_peeruuid, buf->lsd_peeruuid, sizeof(lsd->lsd_peeruuid));
396 lsd->lsd_osd_index = le32_to_cpu(buf->lsd_osd_index);
397 lsd->lsd_padding1 = le32_to_cpu(buf->lsd_padding1);
398 lsd->lsd_start_epoch = le32_to_cpu(buf->lsd_start_epoch);
399 for (i = 0; i < LR_EXPIRE_INTERVALS; i++)
400 lsd->lsd_trans_table[i] = le64_to_cpu(buf->lsd_trans_table[i]);
401 lsd->lsd_trans_table_time = le32_to_cpu(buf->lsd_trans_table_time);
402 lsd->lsd_expire_intervals = le32_to_cpu(buf->lsd_expire_intervals);
403}
404
405static inline void lsd_cpu_to_le(struct lr_server_data *lsd,
406 struct lr_server_data *buf)
407{
408 int i;
409 memcpy(buf->lsd_uuid, lsd->lsd_uuid, sizeof(buf->lsd_uuid));
410 buf->lsd_last_transno = cpu_to_le64(lsd->lsd_last_transno);
411 buf->lsd_compat14 = cpu_to_le64(lsd->lsd_compat14);
412 buf->lsd_mount_count = cpu_to_le64(lsd->lsd_mount_count);
413 buf->lsd_feature_compat = cpu_to_le32(lsd->lsd_feature_compat);
414 buf->lsd_feature_rocompat = cpu_to_le32(lsd->lsd_feature_rocompat);
415 buf->lsd_feature_incompat = cpu_to_le32(lsd->lsd_feature_incompat);
416 buf->lsd_server_size = cpu_to_le32(lsd->lsd_server_size);
417 buf->lsd_client_start = cpu_to_le32(lsd->lsd_client_start);
418 buf->lsd_client_size = cpu_to_le16(lsd->lsd_client_size);
419 buf->lsd_subdir_count = cpu_to_le16(lsd->lsd_subdir_count);
420 buf->lsd_catalog_oid = cpu_to_le64(lsd->lsd_catalog_oid);
421 buf->lsd_catalog_ogen = cpu_to_le32(lsd->lsd_catalog_ogen);
422 memcpy(buf->lsd_peeruuid, lsd->lsd_peeruuid, sizeof(buf->lsd_peeruuid));
423 buf->lsd_osd_index = cpu_to_le32(lsd->lsd_osd_index);
424 buf->lsd_padding1 = cpu_to_le32(lsd->lsd_padding1);
425 buf->lsd_start_epoch = cpu_to_le32(lsd->lsd_start_epoch);
426 for (i = 0; i < LR_EXPIRE_INTERVALS; i++)
427 buf->lsd_trans_table[i] = cpu_to_le64(lsd->lsd_trans_table[i]);
428 buf->lsd_trans_table_time = cpu_to_le32(lsd->lsd_trans_table_time);
429 buf->lsd_expire_intervals = cpu_to_le32(lsd->lsd_expire_intervals);
430}
431
432static inline void lcd_le_to_cpu(struct lsd_client_data *buf,
433 struct lsd_client_data *lcd)
434{
435 memcpy(lcd->lcd_uuid, buf->lcd_uuid, sizeof (lcd->lcd_uuid));
436 lcd->lcd_last_transno = le64_to_cpu(buf->lcd_last_transno);
437 lcd->lcd_last_xid = le64_to_cpu(buf->lcd_last_xid);
438 lcd->lcd_last_result = le32_to_cpu(buf->lcd_last_result);
439 lcd->lcd_last_data = le32_to_cpu(buf->lcd_last_data);
440 lcd->lcd_last_close_transno = le64_to_cpu(buf->lcd_last_close_transno);
441 lcd->lcd_last_close_xid = le64_to_cpu(buf->lcd_last_close_xid);
442 lcd->lcd_last_close_result = le32_to_cpu(buf->lcd_last_close_result);
443 lcd->lcd_last_close_data = le32_to_cpu(buf->lcd_last_close_data);
444 lcd->lcd_pre_versions[0] = le64_to_cpu(buf->lcd_pre_versions[0]);
445 lcd->lcd_pre_versions[1] = le64_to_cpu(buf->lcd_pre_versions[1]);
446 lcd->lcd_pre_versions[2] = le64_to_cpu(buf->lcd_pre_versions[2]);
447 lcd->lcd_pre_versions[3] = le64_to_cpu(buf->lcd_pre_versions[3]);
448 lcd->lcd_last_epoch = le32_to_cpu(buf->lcd_last_epoch);
449 lcd->lcd_first_epoch = le32_to_cpu(buf->lcd_first_epoch);
450}
451
452static inline void lcd_cpu_to_le(struct lsd_client_data *lcd,
453 struct lsd_client_data *buf)
454{
455 memcpy(buf->lcd_uuid, lcd->lcd_uuid, sizeof (lcd->lcd_uuid));
456 buf->lcd_last_transno = cpu_to_le64(lcd->lcd_last_transno);
457 buf->lcd_last_xid = cpu_to_le64(lcd->lcd_last_xid);
458 buf->lcd_last_result = cpu_to_le32(lcd->lcd_last_result);
459 buf->lcd_last_data = cpu_to_le32(lcd->lcd_last_data);
460 buf->lcd_last_close_transno = cpu_to_le64(lcd->lcd_last_close_transno);
461 buf->lcd_last_close_xid = cpu_to_le64(lcd->lcd_last_close_xid);
462 buf->lcd_last_close_result = cpu_to_le32(lcd->lcd_last_close_result);
463 buf->lcd_last_close_data = cpu_to_le32(lcd->lcd_last_close_data);
464 buf->lcd_pre_versions[0] = cpu_to_le64(lcd->lcd_pre_versions[0]);
465 buf->lcd_pre_versions[1] = cpu_to_le64(lcd->lcd_pre_versions[1]);
466 buf->lcd_pre_versions[2] = cpu_to_le64(lcd->lcd_pre_versions[2]);
467 buf->lcd_pre_versions[3] = cpu_to_le64(lcd->lcd_pre_versions[3]);
468 buf->lcd_last_epoch = cpu_to_le32(lcd->lcd_last_epoch);
469 buf->lcd_first_epoch = cpu_to_le32(lcd->lcd_first_epoch);
470}
471
472static inline __u64 lcd_last_transno(struct lsd_client_data *lcd)
473{
474 return (lcd->lcd_last_transno > lcd->lcd_last_close_transno ?
475 lcd->lcd_last_transno : lcd->lcd_last_close_transno);
476}
477
478static inline __u64 lcd_last_xid(struct lsd_client_data *lcd)
479{
480 return (lcd->lcd_last_xid > lcd->lcd_last_close_xid ?
481 lcd->lcd_last_xid : lcd->lcd_last_close_xid);
482}
483
484/****************** superblock additional info *********************/
485
486struct ll_sb_info;
487
488struct lustre_sb_info {
489 int lsi_flags;
490 struct obd_device *lsi_mgc; /* mgc obd */
491 struct lustre_mount_data *lsi_lmd; /* mount command info */
492 struct ll_sb_info *lsi_llsbi; /* add'l client sbi info */
493 struct dt_device *lsi_dt_dev; /* dt device to access disk fs*/
494 struct vfsmount *lsi_srv_mnt; /* the one server mount */
495 atomic_t lsi_mounts; /* references to the srv_mnt */
496 char lsi_svname[MTI_NAME_MAXLEN];
497 char lsi_osd_obdname[64];
498 char lsi_osd_uuid[64];
499 struct obd_export *lsi_osd_exp;
500 char lsi_osd_type[16];
501 char lsi_fstype[16];
502 struct backing_dev_info lsi_bdi; /* each client mountpoint needs
503 own backing_dev_info */
504};
505
506#define LSI_UMOUNT_FAILOVER 0x00200000
507#define LSI_BDI_INITIALIZED 0x00400000
508
509#define s2lsi(sb) ((struct lustre_sb_info *)((sb)->s_fs_info))
510#define s2lsi_nocast(sb) ((sb)->s_fs_info)
511
512#define get_profile_name(sb) (s2lsi(sb)->lsi_lmd->lmd_profile)
513#define get_mount_flags(sb) (s2lsi(sb)->lsi_lmd->lmd_flags)
514#define get_mntdev_name(sb) (s2lsi(sb)->lsi_lmd->lmd_dev)
515
516
517/****************** mount lookup info *********************/
518
519struct lustre_mount_info {
520 char *lmi_name;
521 struct super_block *lmi_sb;
522 struct vfsmount *lmi_mnt;
523 struct list_head lmi_list_chain;
524};
525
d7e09d03
PT		 526/****************** prototypes *********************/
527
528/* obd_mount.c */
529int server_name2fsname(const char *svname, char *fsname, const char **endptr);
530int server_name2index(const char *svname, __u32 *idx, const char **endptr);
531int server_name2svname(const char *label, char *svname, const char **endptr,
532 size_t svsize);
533
534int lustre_put_lsi(struct super_block *sb);
535int lustre_start_simple(char *obdname, char *type, char *uuid,
536 char *s1, char *s2, char *s3, char *s4);
537int lustre_start_mgc(struct super_block *sb);
538void lustre_register_client_fill_super(int (*cfs)(struct super_block *sb,
539 struct vfsmount *mnt));
540void lustre_register_kill_super_cb(void (*cfs)(struct super_block *sb));
541int lustre_common_put_super(struct super_block *sb);
542
543
544int mgc_fsname2resid(char *fsname, struct ldlm_res_id *res_id, int type);
545
546/** @} disk */
547
995c8b4a 548#endif /* _LUSTRE_DISK_H */
Linux kernel - Deliverables
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