lib/libhammer/libhammer.h

   1 /*
   2  * Copyright (c) 2011 The DragonFly Project.  All rights reserved.
   3  *
   4  * This code is derived from software contributed to The DragonFly Project
   5  * by Antonio Huete <tuxillo@quantumachine.net>
   6  * by Matthew Dillon <dillon@backplane.com>
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  *
  12  * 1. Redistributions of source code must retain the above copyright
  13  *    notice, this list of conditions and the following disclaimer.
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in
  16  *    the documentation and/or other materials provided with the
  17  *    distribution.
  18  * 3. Neither the name of The DragonFly Project nor the names of its
  19  *    contributors may be used to endorse or promote products derived
  20  *    from this software without specific, prior written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  23  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  24  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
  25  * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE
  26  * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
  27  * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
  28  * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
  29  * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
  30  * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  31  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
  32  * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33  * SUCH DAMAGE.
  34  *
  35  */
  36 #ifndef _LIBHAMMER_H_
  37 #define _LIBHAMMER_H_
  38
  39 #include <sys/queue.h>
  40 #include <sys/param.h>
  41
  42 #include <vfs/hammer/hammer_disk.h>
  43 #include <vfs/hammer/hammer_ioctl.h>
  44
  45 #define TXTLEN  64
  46
  47 #define HAMMER_BUFLISTS         64
  48 #define HAMMER_BUFLISTMASK      (HAMMER_BUFLISTS - 1)
  49 #define COLLECT_HSIZE   1024
  50 #define COLLECT_HMASK   (COLLECT_HSIZE - 1)
  51 #define HAMMER_BUFINFO_READAHEAD        0x0001
  52 /*
  53  * WARNING: Do not make the SNAPSHOTS_BASE "/var/snapshots" because
  54  * it will interfere with the older HAMMER VERS < 3 snapshots directory
  55  * for the /var PFS.
  56  */
  57 #define SNAPSHOTS_BASE  "/var/hammer"   /* HAMMER VERS >= 3 */
  58 #define WS      " \t\r\n"
  59
  60 #define SERIALBUF_SIZE  (512 * 1024)
  61 #define RD_HSIZE        32768
  62 #define RD_HMASK        (RD_HSIZE - 1)
  63
  64 #define DICTF_MADEDIR   0x01
  65 #define DICTF_MADEFILE  0x02
  66 #define DICTF_PARENT    0x04    /* parent attached for real */
  67 #define DICTF_TRAVERSED 0x80
  68 #define FLAG_TOOFARLEFT         0x0001
  69 #define FLAG_TOOFARRIGHT        0x0002
  70 #define FLAG_BADTYPE            0x0004
  71 #define FLAG_BADCHILDPARENT     0x0008
  72 #define FLAG_BADMIRRORTID       0x0010
  73
  74 /*
  75  * Hammer information system structures
  76  */
  77 struct libhammer_head {
  78         int32_t error;
  79         int32_t flags;
  80         int32_t rsv[2];
  81 };
  82
  83 typedef struct libhammer_pfsinfo {
  84         struct libhammer_head head; /* Additional error and flags */
  85
  86         uint32_t  snapcount;        /* Snapshot count */
  87         u_int32_t version;          /* HAMMER version */
  88         char      *mountedon;       /* Mount path of the PFS */
  89         int       ismaster;         /* Is a PFS master */
  90         int       pfs_id;           /* PFS ID number */
  91         int       mirror_flags;     /* Misc flags */
  92         char      snapshots[64];    /* softlink dir for pruning */
  93         uuid_t    unique_uuid;      /* unique uuid of this master/slave */
  94         TAILQ_ENTRY(libhammer_pfsinfo) entries;
  95 } *libhammer_pfsinfo_t;
  96
  97 typedef struct libhammer_volinfo {
  98         struct libhammer_head head; /* Additional error and flags */
  99
 100         char     vol_name[TXTLEN];  /* Volume name */
 101         uuid_t   vol_fsid;          /* Filesystem UUID */
 102         int      version;           /* HAMMER version */
 103         int      nvolumes;          /* Number of volumes */
 104         int64_t  inodes;            /* no. of inodes */
 105         int64_t  bigblocks;         /* Total big blocks */
 106         int64_t  freebigblocks;     /* Free big blocks */
 107         int64_t  rsvbigblocks;      /* Reserved big blocks */
 108         int32_t  rsv[8];
 109         TAILQ_HEAD(pfslist, libhammer_pfsinfo) list_pseudo;
 110 } *libhammer_volinfo_t;
 111
 112 /*
 113  * INFO directive prototypes
 114  */
 115 __BEGIN_DECLS
 116 libhammer_volinfo_t libhammer_get_volinfo(const char *);
 117 void libhammer_free_volinfo(libhammer_volinfo_t);
 118 __END_DECLS
 119
 120 static __inline libhammer_pfsinfo_t
 121 libhammer_get_next_pfs(libhammer_pfsinfo_t pfsinfo)
 122 {
 123         return TAILQ_NEXT(pfsinfo, entries);
 124 }
 125
 126 static __inline libhammer_pfsinfo_t
 127 libhammer_get_prev_pfs(libhammer_pfsinfo_t pfsinfo)
 128 {
 129         return TAILQ_PREV(pfsinfo, pfslist, entries);
 130 }
 131
 132 static __inline libhammer_pfsinfo_t
 133 libhammer_get_first_pfs(libhammer_volinfo_t volinfo)
 134 {
 135         return TAILQ_FIRST(&volinfo->list_pseudo);
 136 }
 137
 138 static __inline libhammer_pfsinfo_t
 139 libhammer_get_last_pfs(libhammer_volinfo_t volinfo)
 140 {
 141         return TAILQ_LAST(&volinfo->list_pseudo, pfslist);
 142 }
 143
 144 /*
 145  * MISC directive prototypes
 146  */
 147 __BEGIN_DECLS
 148 char *libhammer_find_pfs_mount(int, uuid_t, int);
 149 void *_libhammer_malloc(size_t);
 150 __END_DECLS
 151
 152 #endif