Add status subcommand for dedup command group. Signed-off-by: Qu Wenruo <quwen...@cn.fujitsu.com> --- Documentation/btrfs-dedup.asciidoc | 3 ++ cmds-dedup.c | 76 ++++++++++++++++++++++++++++++++++++++ 2 files changed, 79 insertions(+)
diff --git a/Documentation/btrfs-dedup.asciidoc b/Documentation/btrfs-dedup.asciidoc index 99141cd..fd0550f 100644 --- a/Documentation/btrfs-dedup.asciidoc +++ b/Documentation/btrfs-dedup.asciidoc @@ -59,6 +59,9 @@ Specify maximum memory used for hashes. Only works for 'inmemory' backend. No default value. +*status* <path>:: +Show current in-band de-duplication status of a filesystem. + BACKENDS -------- Btrfs in-band de-duplication support two different backends with their own diff --git a/cmds-dedup.c b/cmds-dedup.c index c85bb5b..64f898b 100644 --- a/cmds-dedup.c +++ b/cmds-dedup.c @@ -213,11 +213,87 @@ out: return 0; } +static const char * const cmd_dedup_status_usage[] = { + "btrfs dedup status <path>", + "Show current in-band(write time) de-duplication status of a btrfs.", + NULL +}; + +static int cmd_dedup_status(int argc, char **argv) +{ + struct btrfs_ioctl_dedup_args dargs; + DIR *dirstream; + char *path; + int fd; + int ret; + int print_limit = 1; + + if (check_argc_exact(argc, 2)) + usage(cmd_dedup_status_usage); + + path = argv[1]; + fd = open_file_or_dir(path, &dirstream); + if (fd < 0) { + error("failed to open file or directory: %s", path); + ret = 1; + goto out; + } + memset(&dargs, 0, sizeof(dargs)); + dargs.cmd = BTRFS_DEDUP_CTL_STATUS; + + ret = ioctl(fd, BTRFS_IOC_DEDUP_CTL, &dargs); + if (ret < 0) { + error("failed to get inband deduplication status: %s", + strerror(errno)); + ret = 1; + goto out; + } + ret = 0; + if (dargs.status == 0) { + printf("Status: \t\t\tDisabled\n"); + goto out; + } + printf("Status:\t\t\tEnabled\n"); + + if (dargs.hash_type == BTRFS_DEDUP_HASH_SHA256) + printf("Hash algorithm:\t\tSHA-256\n"); + else + printf("Hash algorithm:\t\tUnrecognized(%x)\n", + dargs.hash_type); + + if (dargs.backend == BTRFS_DEDUP_BACKEND_INMEMORY) { + printf("Backend:\t\tIn-memory\n"); + print_limit = 1; + } else if (dargs.backend == BTRFS_DEDUP_BACKEND_ONDISK) { + printf("Backend:\t\tOn-disk\n"); + print_limit = 0; + } else { + printf("Backend:\t\tUnrecognized(%x)\n", + dargs.backend); + } + + printf("Dedup Blocksize:\t%llu\n", dargs.blocksize); + + if (print_limit) { + printf("Number of hash: \t[%llu/%llu]\n", dargs.current_nr, + dargs.limit_nr); + printf("Memory usage: \t\t[%s/%s]\n", + pretty_size(dargs.current_nr * + (dargs.limit_mem / dargs.limit_nr)), + pretty_size(dargs.limit_mem)); + } +out: + close_file_or_dir(fd, dirstream); + return ret; +} + const struct cmd_group dedup_cmd_group = { dedup_cmd_group_usage, dedup_cmd_group_info, { { "enable", cmd_dedup_enable, cmd_dedup_enable_usage, NULL, 0}, { "disable", cmd_dedup_disable, cmd_dedup_disable_usage, NULL, 0}, + { "status", cmd_dedup_status, cmd_dedup_status_usage, + NULL, 0}, NULL_CMD_STRUCT } }; -- 2.7.0 -- To unsubscribe from this list: send the line "unsubscribe linux-btrfs" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html