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c42f72867a
Before, the cft_check_handle used to direct configuration checking was part of cmd_context. It's better to attach this as part of the exact config tree against which the check is done. This patch moves the cft_check_handle out of cmd_context and it attaches it to the config tree directly as dm_config_tree->custom->config_source->check_handle. This change makes it easier to track the config tree check results and provides less space for bugs as the results are directly attached to the tree and we don't need to be cautious whether the global value is correct or not (and whether it needs reinitialization) as it was in the case when the cft_check_handle was part of cmd_context.
249 lines
11 KiB
C
249 lines
11 KiB
C
/*
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* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
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* Copyright (C) 2004-2007 Red Hat, Inc. All rights reserved.
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*
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* This file is part of LVM2.
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*
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* This copyrighted material is made available to anyone wishing to use,
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* modify, copy, or redistribute it subject to the terms and conditions
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* of the GNU Lesser General Public License v.2.1.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _LVM_CONFIG_H
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#define _LVM_CONFIG_H
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#include "libdevmapper.h"
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/* 16 bits: 3 bits for major, 4 bits for minor, 9 bits for patchlevel */
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/* FIXME Max LVM version supported: 7.15.511. Extend bits when needed. */
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#define vsn(major, minor, patchlevel) (major << 13 | minor << 9 | patchlevel)
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struct device;
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struct cmd_context;
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typedef enum {
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CONFIG_UNDEFINED, /* undefined/uninitialized config */
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CONFIG_FILE, /* one file config */
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CONFIG_MERGED_FILES, /* config that is a result of merging more config files */
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CONFIG_STRING, /* config string typed on cmdline using '--config' arg */
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CONFIG_PROFILE, /* profile config */
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CONFIG_FILE_SPECIAL /* special purpose file config (e.g. metadata, persistent filter...) */
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} config_source_t;
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struct profile {
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struct dm_list list;
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const char *name;
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struct dm_config_tree *cft;
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};
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struct profile_params {
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const char *dir; /* subdir in LVM_SYSTEM_DIR where LVM looks for profiles */
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struct profile *global_profile; /* profile that overrides any other VG/LV-based profile ('--profile' cmd line arg) */
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struct dm_list profiles_to_load;/* list of profiles which are only added, but still need to be loaded for any use */
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struct dm_list profiles; /* list of profiles which are loaded already and which are ready for use */
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};
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#define CFG_PATH_MAX_LEN 64
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/*
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* Structures used for definition of a configuration tree.
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*/
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/* configuration definition item type (for item's accepted types) */
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typedef enum {
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CFG_TYPE_SECTION = 1 << 0, /* section */
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CFG_TYPE_ARRAY = 1 << 1, /* setting */
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CFG_TYPE_BOOL = 1 << 2, /* setting */
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CFG_TYPE_INT = 1 << 3, /* setting */
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CFG_TYPE_FLOAT = 1 << 4, /* setting */
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CFG_TYPE_STRING = 1 << 5, /* setting */
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} cfg_def_type_t;
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/* function types to evaluate default value at runtime */
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typedef int (*t_fn_CFG_TYPE_BOOL) (struct cmd_context *cmd, struct profile *profile);
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typedef int (*t_fn_CFG_TYPE_INT) (struct cmd_context *cmd, struct profile *profile);
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typedef float (*t_fn_CFG_TYPE_FLOAT) (struct cmd_context *cmd, struct profile *profile);
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typedef const char* (*t_fn_CFG_TYPE_STRING) (struct cmd_context *cmd, struct profile *profile);
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typedef const char* (*t_fn_CFG_TYPE_ARRAY) (struct cmd_context *cmd, struct profile *profile);
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/* configuration definition item value (for item's default value) */
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typedef union {
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/* static value - returns a variable */
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const int v_CFG_TYPE_BOOL, v_CFG_TYPE_INT;
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const float v_CFG_TYPE_FLOAT;
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const char *v_CFG_TYPE_STRING, *v_CFG_TYPE_ARRAY;
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/* run-time value - evaluates a function */
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t_fn_CFG_TYPE_BOOL fn_CFG_TYPE_BOOL;
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t_fn_CFG_TYPE_INT fn_CFG_TYPE_INT;
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t_fn_CFG_TYPE_FLOAT fn_CFG_TYPE_FLOAT;
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t_fn_CFG_TYPE_STRING fn_CFG_TYPE_STRING;
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t_fn_CFG_TYPE_ARRAY fn_CFG_TYPE_ARRAY;
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} cfg_def_value_t;
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/* configuration definition item flags: */
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/* whether the configuration item name is variable */
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#define CFG_NAME_VARIABLE 0x01
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/* whether empty value is allowed */
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#define CFG_ALLOW_EMPTY 0x02
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/* whether the configuration item is for advanced use only */
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#define CFG_ADVANCED 0x04
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/* whether the configuration item is not officially supported */
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#define CFG_UNSUPPORTED 0x08
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/* whether the configuration item is customizable by a profile */
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#define CFG_PROFILABLE 0x10
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/* whether the default value is undefned */
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#define CFG_DEFAULT_UNDEFINED 0x20
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/* whether the defualt value is calculated during run time */
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#define CFG_DEFAULT_RUN_TIME 0x40
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/* configuration definition item structure */
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typedef struct cfg_def_item {
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int id; /* ID of this item */
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int parent; /* ID of parent item */
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const char *name; /* name of the item in configuration tree */
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int type; /* configuration item type (bits of cfg_def_type_t) */
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cfg_def_value_t default_value; /* default value (only for settings) */
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uint16_t flags; /* configuration item definition flags */
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uint16_t since_version; /* version this item appeared in */
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const char *comment; /* brief comment */
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} cfg_def_item_t;
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/* configuration definition tree types */
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typedef enum {
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CFG_DEF_TREE_CURRENT, /* tree of nodes with values currently set in the config */
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CFG_DEF_TREE_MISSING, /* tree of nodes missing in current config using default values */
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CFG_DEF_TREE_COMPLETE, /* CURRENT + MISSING, the tree actually used within execution, not implemented yet */
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CFG_DEF_TREE_DEFAULT, /* tree of all possible config nodes with default values */
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CFG_DEF_TREE_NEW, /* tree of all new nodes that appeared in given version */
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CFG_DEF_TREE_PROFILABLE, /* tree of all nodes that are customizable by profiles */
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CFG_DEF_TREE_DIFF, /* tree of all nodes that differ from defaults */
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} cfg_def_tree_t;
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/* configuration definition tree specification */
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struct config_def_tree_spec {
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struct cmd_context *cmd; /* command context (for run-time defaults */
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cfg_def_tree_t type; /* tree type */
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uint16_t version; /* tree at this LVM2 version */
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int ignoreadvanced:1; /* do not include advanced configs */
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int ignoreunsupported:1; /* do not include unsupported configs */
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int withcomments:1; /* include comments */
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int withversions:1; /* include versions */
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uint8_t *check_status; /* status of last tree check (currently needed for CFG_DEF_TREE_MISSING only) */
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};
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/* flag to mark the item as used in a config tree instance during validation */
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#define CFG_USED 0x01
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/* flag to mark the item as valid in a config tree instance during validation */
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#define CFG_VALID 0x02
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/* flag to mark the item as having the value different from default one */
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#define CFG_DIFF 0x04
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/*
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* Register ID for each possible item in the configuration tree.
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*/
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enum {
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#define cfg_section(id, name, parent, flags, since_version, comment) id,
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#define cfg(id, name, parent, flags, type, default_value, since_version, comment) id,
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#define cfg_runtime(id, name, parent, flags, type, since_version, comment) id,
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#define cfg_array(id, name, parent, flags, types, default_value, since_version, comment) id,
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#define cfg_array_runtime(id, name, parent, flags, types, since_version, comment) id,
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#include "config_settings.h"
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#undef cfg_section
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#undef cfg
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#undef cfg_runtime
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#undef cfg_array
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#undef cfg_array_runtime
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};
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struct profile *add_profile(struct cmd_context *cmd, const char *profile_name);
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int load_profile(struct cmd_context *cmd, struct profile *profile);
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int load_pending_profiles(struct cmd_context *cmd);
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/* configuration check handle for each instance of the validation check */
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struct cft_check_handle {
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struct cmd_context *cmd; /* command context */
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struct dm_config_tree *cft; /* the tree for which the check is done */
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config_source_t source; /* configuration source */
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unsigned force_check:1; /* force check even if disabled by config/checks setting */
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unsigned skip_if_checked:1; /* skip the check if already done before - return last state */
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unsigned suppress_messages:1; /* suppress messages during the check if config item is found invalid */
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unsigned check_diff:1; /* check if the value used differs from default one */
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uint8_t status[CFG_COUNT]; /* flags for each configuration item - the result of the check */
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};
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int config_def_get_path(char *buf, size_t buf_size, int id);
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int config_def_check(struct cft_check_handle *handle);
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int override_config_tree_from_string(struct cmd_context *cmd, const char *config_settings);
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int override_config_tree_from_profile(struct cmd_context *cmd, struct profile *profile);
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struct dm_config_tree *get_config_tree_by_source(struct cmd_context *, config_source_t source);
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struct dm_config_tree *remove_config_tree_by_source(struct cmd_context *cmd, config_source_t source);
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struct cft_check_handle *get_config_tree_check_handle(struct cmd_context *cmd, struct dm_config_tree *cft);
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config_source_t config_get_source_type(struct dm_config_tree *cft);
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typedef uint32_t (*checksum_fn_t) (uint32_t initial, const uint8_t *buf, uint32_t size);
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struct dm_config_tree *config_open(config_source_t source, const char *filename, int keep_open);
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int config_file_read_fd(struct dm_config_tree *cft, struct device *dev,
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off_t offset, size_t size, off_t offset2, size_t size2,
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checksum_fn_t checksum_fn, uint32_t checksum);
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int config_file_read(struct dm_config_tree *cft);
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struct dm_config_tree *config_file_open_and_read(const char *config_file, config_source_t source,
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struct cmd_context *cmd);
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int config_write(struct dm_config_tree *cft, struct config_def_tree_spec *tree_spec,
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const char *file, int argc, char **argv);
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struct dm_config_tree *config_def_create_tree(struct config_def_tree_spec *spec);
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void config_destroy(struct dm_config_tree *cft);
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time_t config_file_timestamp(struct dm_config_tree *cft);
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int config_file_changed(struct dm_config_tree *cft);
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int config_file_check(struct dm_config_tree *cft, const char **filename, struct stat *info);
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typedef enum {
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CONFIG_MERGE_TYPE_RAW, /* always replace old config values with new config values when merging */
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CONFIG_MERGE_TYPE_TAGS /* apply some exceptions when merging tag configs:
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- skip tags section
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- do not replace, but merge values of these settings:
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activation/volume_list
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devices/filter
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devices/types
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*/
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} config_merge_t;
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int merge_config_tree(struct cmd_context *cmd, struct dm_config_tree *cft,
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struct dm_config_tree *newdata, config_merge_t);
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/*
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* These versions check an override tree, if present, first.
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*/
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const struct dm_config_node *find_config_tree_node(struct cmd_context *cmd, int id, struct profile *profile);
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const char *find_config_tree_str(struct cmd_context *cmd, int id, struct profile *profile);
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const char *find_config_tree_str_allow_empty(struct cmd_context *cmd, int id, struct profile *profile);
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int find_config_tree_int(struct cmd_context *cmd, int id, struct profile *profile);
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int64_t find_config_tree_int64(struct cmd_context *cmd, int id, struct profile *profile);
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float find_config_tree_float(struct cmd_context *cmd, int id, struct profile *profile);
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int find_config_tree_bool(struct cmd_context *cmd, int id, struct profile *profile);
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/*
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* Functions for configuration settings for which the default
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* value is evaluated at runtime based on command context.
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*/
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const char *get_default_devices_cache_dir_CFG(struct cmd_context *cmd, struct profile *profile);
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const char *get_default_devices_cache_CFG(struct cmd_context *cmd, struct profile *profile);
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const char *get_default_backup_backup_dir_CFG(struct cmd_context *cmd, struct profile *profile);
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const char *get_default_backup_archive_dir_CFG(struct cmd_context *cmd, struct profile *profile);
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const char *get_default_config_profile_dir_CFG(struct cmd_context *cmd, struct profile *profile);
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const char *get_default_activation_mirror_image_fault_policy_CFG(struct cmd_context *cmd, struct profile *profile);
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int get_default_allocation_thin_pool_chunk_size_CFG(struct cmd_context *cmd, struct profile *profile);
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int get_default_allocation_cache_pool_chunk_size_CFG(struct cmd_context *cmd, struct profile *profile);
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#endif
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