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Mon, 18 Jul 2022 11:34:41 +0000 From: Nikolay Borisov To: linux-btrfs@vger.kernel.org Cc: Nikolay Borisov Subject: [PATCH 2/2] btrfs-progs: add support for tabular format for device stats Date: Mon, 18 Jul 2022 14:34:39 +0300 Message-Id: <20220718113439.2997247-2-nborisov@suse.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220718113439.2997247-1-nborisov@suse.com> References: <20220718113439.2997247-1-nborisov@suse.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-btrfs@vger.kernel.org Add support for the -T switch to 'device stats" command such that executing 'btrfs device stats -T' produces: Id Path Write errors Read errors Flush errors Corruption errors Generation errors -- -------- ------------ ----------- ------------ ----------------- ----------------- 1 /dev/vdc 0 0 0 0 0 2 /dev/vdd 0 0 0 0 0 Link: https://lore.kernel.org/linux-btrfs/d7bd334d-13ad-8c5c-2122-1afc722fcc9c@dirtcellar.net Signed-off-by: Nikolay Borisov --- cmds/device.c | 109 +++++++++++++++++++++++++++++++++++++++++++++++--- 1 file changed, 103 insertions(+), 6 deletions(-) -- 2.17.1 diff --git a/cmds/device.c b/cmds/device.c index feffe9184726..926fbbd64615 100644 --- a/cmds/device.c +++ b/cmds/device.c @@ -27,6 +27,7 @@ #include "kerncompat.h" #include "kernel-shared/ctree.h" #include "ioctl.h" +#include "common/string-table.h" #include "common/utils.h" #include "kernel-shared/volumes.h" #include "kernel-shared/zoned.h" @@ -572,6 +573,7 @@ static const char * const cmd_device_stats_usage[] = { "", "-c|--check return non-zero if any stat counter is not zero", "-z|--reset show current stats and reset values to zero", + "-T show current stats in tabular format", HELPINFO_INSERT_GLOBALS, HELPINFO_INSERT_FORMAT, NULL @@ -642,17 +644,75 @@ static int _print_device_stat_string(struct format_ctx *fctx, return err; } + +static int _print_device_stat_tabular(struct string_table *table, int row, + struct btrfs_ioctl_get_dev_stats *args, char *path, bool check) +{ + char *canonical_path = path_canonicalize(path); + int j; + int err = 0; + static const struct { + const char name[32]; + enum btrfs_dev_stat_values stat_idx; + } dev_stats[] = { + { "write_io_errs", BTRFS_DEV_STAT_WRITE_ERRS }, + { "read_io_errs", BTRFS_DEV_STAT_READ_ERRS }, + { "flush_io_errs", BTRFS_DEV_STAT_FLUSH_ERRS }, + { "corruption_errs", BTRFS_DEV_STAT_CORRUPTION_ERRS }, + { "generation_errs", BTRFS_DEV_STAT_GENERATION_ERRS }, + }; + + /* skip header + --- line */ + row += 2; + + /* No path when device is missing. */ + if (!canonical_path) { + canonical_path = malloc(32); + + if (!canonical_path) { + error("not enough memory for path buffer"); + return -ENOMEM; + } + + snprintf(canonical_path, 32, "devid:%llu", args->devid); + } + table_printf(table, 0, row, ">%llu", args->devid); + table_printf(table, 1, row, ">%s", canonical_path); + free(canonical_path); + + for (j = 0; j < ARRAY_SIZE(dev_stats); j++) { + enum btrfs_dev_stat_values stat_idx = dev_stats[j].stat_idx; + /* We got fewer items than we know */ + if (args->nr_items < stat_idx + 1) + continue; + + table_printf(table, 2, row, ">%llu", args->values[stat_idx]); + table_printf(table, 3, row, ">%llu", args->values[stat_idx]); + table_printf(table, 4, row, ">%llu", args->values[stat_idx]); + table_printf(table, 5, row, ">%llu", args->values[stat_idx]); + table_printf(table, 6, row, ">%llu", args->values[stat_idx]); + + if (check && (args->values[stat_idx] > 0)) + err |= 64; + } + + return err; +} + static int cmd_device_stats(const struct cmd_struct *cmd, int argc, char **argv) { char *dev_path; struct btrfs_ioctl_fs_info_args fi_args; struct btrfs_ioctl_dev_info_args *di_args = NULL; + struct string_table *table = NULL; int ret; int fdmnt; int i; int err = 0; bool check = false; + bool free_table = false; __u64 flags = 0; + bool tabular = false; DIR *dirstream = NULL; struct format_ctx fctx; @@ -665,7 +725,7 @@ static int cmd_device_stats(const struct cmd_struct *cmd, int argc, char **argv) {NULL, 0, NULL, 0} }; - c = getopt_long(argc, argv, "cz", long_options, NULL); + c = getopt_long(argc, argv, "Tcz", long_options, NULL); if (c < 0) break; @@ -676,6 +736,9 @@ static int cmd_device_stats(const struct cmd_struct *cmd, int argc, char **argv) case 'z': flags = BTRFS_DEV_STATS_RESET; break; + case 'T': + tabular = true; + break; default: usage_unknown_option(cmd, argv); } @@ -703,11 +766,35 @@ static int cmd_device_stats(const struct cmd_struct *cmd, int argc, char **argv) goto out; } - fmt_start(&fctx, device_stats_rowspec, 24, 0); - fmt_print_start_group(&fctx, "device-stats", JSON_TYPE_ARRAY); + if (tabular) { + /* + * cols = Id/Path/write/read/flush/corruption/generation + * rows = num devices + 2 (header and ---- line) + */ + table = table_create(7, fi_args.num_devices + 2); + if (!table) { + error("not enough memory"); + goto out; + } + free_table = true; + table_printf(table, 0,0, "