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dmstats: make 'dmstats list' use common report infrastructure
Unlike 'info -c' and 'stats report' the 'dmstats list' subcommand does its own report processing. This complicates the handling of the DR_STATS and DR_STATS_META fields and leads to inconsistent behaviour between the different commands. In particular it causes 'stats list' to segfault when using 'all' field options: Segmentation fault (core dumped) Delete _stats_list() entirely and adapt _stats_report so that it can correctly format a DR_STATS_META-only report request. This requires passing the subcommand into _report_init() where it is used in addition to the command name to select the default set of report fields for the 'list' and 'report' stats subcommands. With this change both 'list' and 'report' dmstats report will use the correct report object type and ensure that it is initialised appropriately for the field selection in use.
This commit is contained in:
Bryn M. Reeves
parent
37dd26e322
commit
e6724f0303
147
tools/dmsetup.c
147
tools/dmsetup.c
@ -252,9 +252,9 @@ static report_type_t _report_type;
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static dev_name_t _dev_name_type;
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static uint32_t _count = 1; /* count of repeating reports */
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static struct dm_timestamp *_initial_timestamp = NULL;
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static int _stats_report_init = 0;
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static uint64_t _disp_factor = 512; /* display sizes in sectors */
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static char _disp_units = 's';
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const char *_program_id = DM_STATS_PROGRAM_ID; /* program_id used for reports. */
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/* report timekeeping */
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static struct dm_timestamp *_cycle_timestamp = NULL;
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@ -830,7 +830,7 @@ static int _display_info_cols(struct dm_task *dmt, struct dm_info *info)
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dm_stats_bind_devno(obj.stats, info->major, info->minor);
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if (!(dm_stats_populate(obj.stats, DM_STATS_PROGRAM_ID, DM_STATS_REGIONS_ALL)))
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if (!dm_stats_populate(obj.stats, _program_id, DM_STATS_REGIONS_ALL))
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goto out;
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/* Update timestamps and handle end-of-interval accounting. */
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@ -841,6 +841,21 @@ static int _display_info_cols(struct dm_task *dmt, struct dm_info *info)
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dm_stats_set_sampling_interval_ns(obj.stats, _last_interval);
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}
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/* Only a dm_stats_list is needed for DR_STATS_META reports. */
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if (!obj.stats && (_report_type & DR_STATS_META)) {
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if (!(obj.stats = dm_stats_create(DM_STATS_PROGRAM_ID)))
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goto_out;
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dm_stats_bind_devno(obj.stats, info->major, info->minor);
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if (!dm_stats_list(obj.stats, _program_id))
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goto out;
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/* No regions to report */
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if (!dm_stats_get_nr_regions(obj.stats))
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goto out;
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}
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/*
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* Walk any statistics regions contained in the current
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* reporting object: for objects with a NULL stats handle,
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@ -3995,7 +4010,7 @@ static const char *splitname_report_options = "vg_name,lv_name,lv_layer";
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static const char *_stats_default_report_options = DEV_INFO_STATS ",area_id," METRICS;
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static const char *_stats_list_options = "name,region_id,region_start,region_len,area_len,area_count,program_id";
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static int _report_init(const struct command *cmd)
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static int _report_init(const struct command *cmd, const char *subcommand)
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{
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char *options = (char *) default_report_options;
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char *opt_fields = NULL; /* optional fields from command line */
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@ -4014,8 +4029,13 @@ static int _report_init(const struct command *cmd)
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}
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if (cmd && !strcmp(cmd->name, "stats")) {
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options = (char *) _stats_default_report_options;
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_report_type |= (DR_STATS | DR_STATS_META);
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_report_type |= DR_STATS_META;
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if (!strcmp(subcommand, "list"))
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options = (char *) _stats_list_options;
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else {
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options = (char *) _stats_default_report_options;
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_report_type |= DR_STATS;
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}
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}
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if (cmd && !strcmp(cmd->name, "list")) {
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@ -4642,91 +4662,6 @@ out:
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return 0;
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}
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static int _stats_list(CMD_ARGS)
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{
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struct dm_stats *dms;
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const char *name, *program_id = DM_STATS_PROGRAM_ID;
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struct dm_task *dmt = NULL;
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struct dm_info info;
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struct dmsetup_report_obj obj;
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if (names)
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name = names->name;
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else {
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if (!argc && !_switches[UUID_ARG] && !_switches[MAJOR_ARG])
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return _process_all(cmd, subcommand, argc, argv, 0, _stats_list);
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name = argv[0];
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}
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if (_switches[PROGRAM_ID_ARG])
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program_id = _string_args[PROGRAM_ID_ARG];
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if (_switches[ALL_PROGRAMS_ARG])
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program_id = "";
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if (_switches[OPTIONS_ARG] && !strcmp(_string_args[OPTIONS_ARG], "help"))
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/* field help already output from _report_init(). */
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return 1;
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if (!(dms = dm_stats_create(DM_STATS_PROGRAM_ID)))
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return_0;
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if (!_bind_stats_device(dms, name))
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goto_out;
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if (!dm_stats_list(dms, program_id)) {
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log_error("Could not list statistics regions.");
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goto out;
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}
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if (_report && !_stats_report_init) {
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dm_report_free(_report);
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_report_init(cmd);
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_stats_report_init = 1;
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}
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if (!dm_stats_get_nr_regions(dms)) {
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log_info("No statistics regions present.");
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goto none;
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}
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if (!(dmt = dm_task_create(DM_DEVICE_INFO)))
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return 0;
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if (!_set_task_device(dmt, name, 0))
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goto out;
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if (_switches[CHECKS_ARG] && !dm_task_enable_checks(dmt))
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goto out;
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if (!_task_run(dmt))
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goto out;
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if (!dm_task_get_info(dmt, &info))
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goto out;
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obj.task = dmt;
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obj.stats = dms;
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obj.info = &info;
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dm_stats_walk_do(obj.stats) {
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dm_report_object(_report, &obj);
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dm_stats_walk_next_region(obj.stats);
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} dm_stats_walk_while(obj.stats);
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dm_task_destroy(dmt);
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none:
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dm_stats_destroy(dms);
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return 1;
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out:
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if (dmt)
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dm_task_destroy(dmt);
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dm_stats_destroy(dms);
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return 0;
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}
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static int _stats_print(CMD_ARGS)
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{
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struct dm_stats *dms;
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@ -4805,6 +4740,12 @@ static int _stats_report(CMD_ARGS)
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struct dm_task *dmt;
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char *name = NULL;
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if (_switches[PROGRAM_ID_ARG])
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_program_id = _string_args[PROGRAM_ID_ARG];
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if (_switches[ALL_PROGRAMS_ARG])
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_program_id = "";
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if (names)
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name = names->name;
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else {
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@ -4869,7 +4810,7 @@ static struct command _stats_subcommands[] = {
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{"clear", "--regionid <id> [<device>]", 0, -1, 1, 0, _stats_clear},
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{"create", CREATE_OPTS "\n\t\t" ID_OPTS "[<device>]", 0, -1, 1, 0, _stats_create},
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{"delete", "--regionid <id> <device>", 1, -1, 1, 0, _stats_delete},
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{"list", "[--programid <id>] [<device>]", 0, -1, 1, 0, _stats_list},
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{"list", "[--programid <id>] [<device>]", 0, -1, 1, 0, _stats_report},
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{"print", PRINT_OPTS "[<device>]", 0, -1, 1, 0, _stats_print},
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{"report", REPORT_OPTS "[<device>]", 0, -1, 1, 0, _stats_report},
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{"version", "", 0, -1, 1, 0, _version},
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@ -5025,7 +4966,7 @@ static int _stats_help(CMD_ARGS)
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_report = NULL;
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}
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(void) _report_init(cmd);
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(void) _report_init(cmd, "help");
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if (_report) {
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dm_report_free(_report);
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_report = NULL;
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@ -5048,7 +4989,7 @@ static int _dmsetup_help(CMD_ARGS)
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dm_report_free(_report);
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_report = NULL;
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}
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(void) _report_init(cmd);
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(void) _report_init(cmd, "");
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if (_report) {
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dm_report_free(_report);
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_report = NULL;
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@ -5964,7 +5905,16 @@ unknown:
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goto out;
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#endif
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if (_switches[COLS_ARG] && !_report_init(cmd))
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/*
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* Extract subcommand?
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* dmsetup <command> <subcommand> [args...]
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*/
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if (cmd->has_subcommands) {
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subcommand = argv[0];
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argc--, argv++;
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}
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if (_switches[COLS_ARG] && !_report_init(cmd, subcommand))
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goto out;
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if (_switches[COUNT_ARG])
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@ -5981,15 +5931,6 @@ unknown:
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}
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}
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/*
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* Extract subcommand?
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* dmsetup <command> <subcommand> [args...]
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*/
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if (cmd->has_subcommands) {
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subcommand = argv[0];
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argc--, argv++;
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}
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/* Start interval timer. */
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if (_count > 1)
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if (!_start_timer())
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