From: Qu Wenruo <quwen...@cn.fujitsu.com> Add status subcommand for dedupe command group.
Signed-off-by: Qu Wenruo <quwen...@cn.fujitsu.com> --- Documentation/btrfs-dedupe-inband.asciidoc | 3 + btrfs-completion | 2 +- cmds-dedupe-ib.c | 81 ++++++++++++++++++++++ 3 files changed, 85 insertions(+), 1 deletion(-) diff --git a/Documentation/btrfs-dedupe-inband.asciidoc b/Documentation/btrfs-dedupe-inband.asciidoc index de32eb97d9dd..df068c31ca3a 100644 --- a/Documentation/btrfs-dedupe-inband.asciidoc +++ b/Documentation/btrfs-dedupe-inband.asciidoc @@ -86,6 +86,9 @@ And compression has higher priority than in-band de-duplication, means if compression and de-duplication is enabled at the same time, only compression will work. +*status* <path>:: +Show current in-band de-duplication status of a filesystem. + BACKENDS -------- Btrfs in-band de-duplication will support different storage backends, with diff --git a/btrfs-completion b/btrfs-completion index 2f113e01fb01..c8e67b459341 100644 --- a/btrfs-completion +++ b/btrfs-completion @@ -41,7 +41,7 @@ _btrfs() commands_quota='enable disable rescan' commands_qgroup='assign remove create destroy show limit' commands_replace='start status cancel' - commands_dedupe='enable disable' + commands_dedupe='enable disable status' if [[ "$cur" == -* && $cword -le 3 && "$cmd" != "help" ]]; then COMPREPLY=( $( compgen -W '--help' -- "$cur" ) ) diff --git a/cmds-dedupe-ib.c b/cmds-dedupe-ib.c index 031766c1d91c..854cbda131a3 100644 --- a/cmds-dedupe-ib.c +++ b/cmds-dedupe-ib.c @@ -302,12 +302,93 @@ out: return 0; } +static const char * const cmd_dedupe_ib_status_usage[] = { + "btrfs dedupe status <path>", + "Show current in-band(write time) de-duplication status of a btrfs.", + NULL +}; + +static int cmd_dedupe_ib_status(int argc, char **argv) +{ + struct btrfs_ioctl_dedupe_args dargs; + DIR *dirstream; + char *path; + int fd; + int ret; + int print_limit = 1; + + if (check_argc_exact(argc, 2)) + usage(cmd_dedupe_ib_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_DEDUPE_CTL_STATUS; + + ret = ioctl(fd, BTRFS_IOC_DEDUPE_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_algo == BTRFS_DEDUPE_HASH_SHA256) + printf("Hash algorithm:\t\tSHA-256\n"); + else + printf("Hash algorithm:\t\tUnrecognized(%x)\n", + dargs.hash_algo); + + if (dargs.backend == BTRFS_DEDUPE_BACKEND_INMEMORY) { + printf("Backend:\t\tIn-memory\n"); + print_limit = 1; + } else { + printf("Backend:\t\tUnrecognized(%x)\n", + dargs.backend); + } + + printf("Dedup Blocksize:\t%llu\n", dargs.blocksize); + + if (print_limit) { + u64 cur_mem; + + /* Limit nr may be 0 */ + if (dargs.limit_nr) + cur_mem = dargs.current_nr * (dargs.limit_mem / + dargs.limit_nr); + else + cur_mem = 0; + + printf("Number of hash: \t[%llu/%llu]\n", dargs.current_nr, + dargs.limit_nr); + printf("Memory usage: \t\t[%s/%s]\n", + pretty_size(cur_mem), + pretty_size(dargs.limit_mem)); + } +out: + close_file_or_dir(fd, dirstream); + return ret; +} + const struct cmd_group dedupe_ib_cmd_group = { dedupe_ib_cmd_group_usage, dedupe_ib_cmd_group_info, { { "enable", cmd_dedupe_ib_enable, cmd_dedupe_ib_enable_usage, NULL, 0}, { "disable", cmd_dedupe_ib_disable, cmd_dedupe_ib_disable_usage, NULL, 0}, + { "status", cmd_dedupe_ib_status, cmd_dedupe_ib_status_usage, + NULL, 0}, NULL_CMD_STRUCT } }; -- 2.17.0 -- 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