include/libzutil.h

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21 /*
  22  * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved.
  23  * Copyright (c) 2018 by Delphix. All rights reserved.
  24  */
  25
  26 #ifndef _LIBZUTIL_H
  27 #define _LIBZUTIL_H
  28
  29 #include <sys/nvpair.h>
  30 #include <sys/fs/zfs.h>
  31
  32 #ifdef  __cplusplus
  33 extern "C" {
  34 #endif
  35
  36 /*
  37  * Default wait time for a device name to be created.
  38  */
  39 #define DISK_LABEL_WAIT         (30 * 1000)  /* 30 seconds */
  40
  41
  42 /*
  43  * Pool Config Operations
  44  *
  45  * These are specific to the library libzfs or libzpool instance.
  46  */
  47 typedef nvlist_t *refresh_config_func_t(void *, nvlist_t *);
  48
  49 typedef int pool_active_func_t(void *, const char *, uint64_t, boolean_t *);
  50
  51 typedef const struct pool_config_ops {
  52         refresh_config_func_t   *pco_refresh_config;
  53         pool_active_func_t      *pco_pool_active;
  54 } pool_config_ops_t;
  55
  56 /*
  57  * An instance of pool_config_ops_t is expected in the caller's binary.
  58  */
  59 extern const pool_config_ops_t libzfs_config_ops;
  60 extern const pool_config_ops_t libzpool_config_ops;
  61
  62 typedef struct importargs {
  63         char **path;            /* a list of paths to search            */
  64         int paths;              /* number of paths to search            */
  65         const char *poolname;   /* name of a pool to find               */
  66         uint64_t guid;          /* guid of a pool to find               */
  67         const char *cachefile;  /* cachefile to use for import          */
  68         boolean_t can_be_active; /* can the pool be active?             */
  69         boolean_t scan;         /* prefer scanning to libblkid cache    */
  70         nvlist_t *policy;       /* load policy (max txg, rewind, etc.)  */
  71 } importargs_t;
  72
  73 extern nvlist_t *zpool_search_import(void *, importargs_t *,
  74     const pool_config_ops_t *);
  75 extern int zpool_find_config(void *, const char *, nvlist_t **, importargs_t *,
  76     const pool_config_ops_t *);
  77
  78 extern const char * const * zpool_default_search_paths(size_t *count);
  79 extern int zpool_read_label(int, nvlist_t **, int *);
  80 extern int zpool_label_disk_wait(const char *, int);
  81
  82 struct udev_device;
  83
  84 extern int zfs_device_get_devid(struct udev_device *, char *, size_t);
  85 extern int zfs_device_get_physical(struct udev_device *, char *, size_t);
  86 extern void update_vdev_config_dev_strs(nvlist_t *);
  87
  88 /*
  89  * Default device paths
  90  */
  91 #define DISK_ROOT       "/dev"
  92 #define UDISK_ROOT      "/dev/disk"
  93 #define ZVOL_ROOT       "/dev/zvol"
  94
  95 extern int zfs_append_partition(char *path, size_t max_len);
  96 extern int zfs_resolve_shortname(const char *name, char *path, size_t pathlen);
  97
  98 extern char *zfs_strip_partition(char *);
  99 extern char *zfs_strip_partition_path(char *);
 100
 101 extern int zfs_strcmp_pathname(const char *, const char *, int);
 102
 103 extern int zfs_dev_is_dm(const char *);
 104 extern int zfs_dev_is_whole_disk(const char *);
 105 extern char *zfs_get_underlying_path(const char *);
 106 extern char *zfs_get_enclosure_sysfs_path(const char *);
 107
 108 #ifdef HAVE_LIBUDEV
 109 extern boolean_t is_mpath_whole_disk(const char *);
 110 #else
 111 #define is_mpath_whole_disk(path) (B_FALSE);
 112 #endif
 113
 114 /*
 115  * Formats for iostat numbers.  Examples: "12K", "30ms", "4B", "2321234", "-".
 116  *
 117  * ZFS_NICENUM_1024:    Print kilo, mega, tera, peta, exa..
 118  * ZFS_NICENUM_BYTES:   Print single bytes ("13B"), kilo, mega, tera...
 119  * ZFS_NICENUM_TIME:    Print nanosecs, microsecs, millisecs, seconds...
 120  * ZFS_NICENUM_RAW:     Print the raw number without any formatting
 121  * ZFS_NICENUM_RAWTIME: Same as RAW, but print dashes ('-') for zero.
 122  */
 123 enum zfs_nicenum_format {
 124         ZFS_NICENUM_1024 = 0,
 125         ZFS_NICENUM_BYTES = 1,
 126         ZFS_NICENUM_TIME = 2,
 127         ZFS_NICENUM_RAW = 3,
 128         ZFS_NICENUM_RAWTIME = 4
 129 };
 130
 131 /*
 132  * Convert a number to a human-readable form.
 133  */
 134 extern void zfs_nicebytes(uint64_t, char *, size_t);
 135 extern void zfs_nicenum(uint64_t, char *, size_t);
 136 extern void zfs_nicenum_format(uint64_t, char *, size_t,
 137     enum zfs_nicenum_format);
 138 extern void zfs_nicetime(uint64_t, char *, size_t);
 139
 140 #define nicenum(num, buf, size) zfs_nicenum(num, buf, size)
 141
 142 extern void zpool_dump_ddt(const ddt_stat_t *, const ddt_histogram_t *);
 143 extern int zpool_history_unpack(char *, uint64_t, uint64_t *, nvlist_t ***,
 144     uint_t *);
 145
 146 #ifdef  __cplusplus
 147 }
 148 #endif
 149
 150 #endif  /* _LIBZUTIL_H */