kernel/fs/zfs/sys/sa.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) 2010, Oracle and/or its affiliates. All rights reserved.
  23  */
  24
  25 #ifndef _SYS_SA_H
  26 #define _SYS_SA_H
  27
  28 #include <sys/dmu.h>
  29
  30 /*
  31  * Currently available byteswap functions.
  32  * If it all possible new attributes should used
  33  * one of the already defined byteswap functions.
  34  * If a new byteswap function is added then the
  35  * ZPL/Pool version will need to be bumped.
  36  */
  37
  38 typedef enum sa_bswap_type {
  39         SA_UINT64_ARRAY,
  40         SA_UINT32_ARRAY,
  41         SA_UINT16_ARRAY,
  42         SA_UINT8_ARRAY,
  43         SA_ACL,
  44 } sa_bswap_type_t;
  45
  46 typedef uint16_t        sa_attr_type_t;
  47
  48 /*
  49  * Attribute to register support for.
  50  */
  51 typedef struct sa_attr_reg {
  52         char                    *sa_name;       /* attribute name */
  53         uint16_t                sa_length;
  54         sa_bswap_type_t         sa_byteswap;    /* bswap functon enum */
  55         sa_attr_type_t          sa_attr; /* filled in during registration */
  56 } sa_attr_reg_t;
  57
  58
  59 typedef void (sa_data_locator_t)(void **, uint32_t *, uint32_t,
  60     boolean_t, void *userptr);
  61
  62 /*
  63  * array of attributes to store.
  64  *
  65  * This array should be treated as opaque/private data.
  66  * The SA_BULK_ADD_ATTR() macro should be used for manipulating
  67  * the array.
  68  *
  69  * When sa_replace_all_by_template() is used the attributes
  70  * will be stored in the order defined in the array, except that
  71  * the attributes may be split between the bonus and the spill buffer
  72  *
  73  */
  74 typedef struct sa_bulk_attr {
  75         void                    *sa_data;
  76         sa_data_locator_t       *sa_data_func;
  77         uint16_t                sa_length;
  78         sa_attr_type_t          sa_attr;
  79         /* the following are private to the sa framework */
  80         void                    *sa_addr;
  81         uint16_t                sa_buftype;
  82         uint16_t                sa_size;
  83 } sa_bulk_attr_t;
  84
  85
  86 /*
  87  * special macro for adding entries for bulk attr support
  88  * bulk - sa_bulk_attr_t
  89  * count - integer that will be incremented during each add
  90  * attr - attribute to manipulate
  91  * func - function for accessing data.
  92  * data - pointer to data.
  93  * len - length of data
  94  */
  95
  96 #define SA_ADD_BULK_ATTR(b, idx, attr, func, data, len) \
  97 { \
  98         b[idx].sa_attr = attr;\
  99         b[idx].sa_data_func = func; \
 100         b[idx].sa_data = data; \
 101         b[idx++].sa_length = len; \
 102 }
 103
 104 typedef struct sa_os sa_os_t;
 105
 106 typedef enum sa_handle_type {
 107         SA_HDL_SHARED,
 108         SA_HDL_PRIVATE
 109 } sa_handle_type_t;
 110
 111 struct sa_handle;
 112 typedef void *sa_lookup_tab_t;
 113 typedef struct sa_handle sa_handle_t;
 114
 115 typedef void (sa_update_cb_t)(sa_handle_t *, dmu_tx_t *tx);
 116
 117 int sa_handle_get(objset_t *, uint64_t, void *userp,
 118     sa_handle_type_t, sa_handle_t **);
 119 int sa_handle_get_from_db(objset_t *, dmu_buf_t *, void *userp,
 120     sa_handle_type_t, sa_handle_t **);
 121 void sa_handle_destroy(sa_handle_t *);
 122 int sa_buf_hold(objset_t *, uint64_t, void *, dmu_buf_t **);
 123 void sa_buf_rele(dmu_buf_t *, void *);
 124 int sa_lookup(sa_handle_t *, sa_attr_type_t, void *buf, uint32_t buflen);
 125 int sa_update(sa_handle_t *, sa_attr_type_t, void *buf,
 126     uint32_t buflen, dmu_tx_t *);
 127 int sa_remove(sa_handle_t *, sa_attr_type_t, dmu_tx_t *);
 128 int sa_bulk_lookup(sa_handle_t *, sa_bulk_attr_t *, int count);
 129 int sa_bulk_lookup_locked(sa_handle_t *, sa_bulk_attr_t *, int count);
 130 int sa_bulk_update(sa_handle_t *, sa_bulk_attr_t *, int count, dmu_tx_t *);
 131 int sa_size(sa_handle_t *, sa_attr_type_t, int *);
 132 int sa_update_from_cb(sa_handle_t *, sa_attr_type_t,
 133     uint32_t buflen, sa_data_locator_t *, void *userdata, dmu_tx_t *);
 134 void sa_object_info(sa_handle_t *, dmu_object_info_t *);
 135 void sa_object_size(sa_handle_t *, uint32_t *, u_longlong_t *);
 136 void *sa_get_userdata(sa_handle_t *);
 137 void sa_set_userp(sa_handle_t *, void *);
 138 dmu_buf_t *sa_get_db(sa_handle_t *);
 139 uint64_t sa_handle_object(sa_handle_t *);
 140 boolean_t sa_attr_would_spill(sa_handle_t *, sa_attr_type_t, int size);
 141 void sa_register_update_callback(objset_t *, sa_update_cb_t *);
 142 int sa_setup(objset_t *, uint64_t, sa_attr_reg_t *, int, sa_attr_type_t **);
 143 void sa_tear_down(objset_t *);
 144 int sa_replace_all_by_template(sa_handle_t *, sa_bulk_attr_t *,
 145     int, dmu_tx_t *);
 146 int sa_replace_all_by_template_locked(sa_handle_t *, sa_bulk_attr_t *,
 147     int, dmu_tx_t *);
 148 boolean_t sa_enabled(objset_t *);
 149 void sa_cache_init(void);
 150 void sa_cache_fini(void);
 151 int sa_set_sa_object(objset_t *, uint64_t);
 152 int sa_hdrsize(void *);
 153 void sa_handle_lock(sa_handle_t *);
 154 void sa_handle_unlock(sa_handle_t *);
 155
 156 #ifdef _KERNEL
 157 int sa_lookup_uio(sa_handle_t *, sa_attr_type_t, uio_t *);
 158 #endif
 159
 160 #ifdef  __cplusplus
 161 extern "C" {
 162 #endif
 163
 164
 165 #ifdef  __cplusplus
 166 }
 167 #endif
 168
 169 #endif  /* _SYS_SA_H */