From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail.cn.fujitsu.com ([183.91.158.132]:64827 "EHLO heian.cn.fujitsu.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726701AbeGLBch (ORCPT ); Wed, 11 Jul 2018 21:32:37 -0400 From: Lu Fengqi To: CC: Qu Wenruo Subject: [PATCH v10.3 5/5] btrfs-progs: dedupe: introduce reconfigure subcommand Date: Thu, 12 Jul 2018 09:25:17 +0800 Message-ID: <20180712012517.29374-6-lufq.fnst@cn.fujitsu.com> In-Reply-To: <20180712012517.29374-1-lufq.fnst@cn.fujitsu.com> References: <20180712012517.29374-1-lufq.fnst@cn.fujitsu.com> MIME-Version: 1.0 Content-Type: text/plain Sender: linux-btrfs-owner@vger.kernel.org List-ID: From: Qu Wenruo Introduce reconfigure subcommand to co-operate with new kernel ioctl modification. Signed-off-by: Qu Wenruo --- Documentation/btrfs-dedupe-inband.asciidoc | 7 ++ cmds-dedupe-ib.c | 75 +++++++++++++++++----- 2 files changed, 66 insertions(+), 16 deletions(-) diff --git a/Documentation/btrfs-dedupe-inband.asciidoc b/Documentation/btrfs-dedupe-inband.asciidoc index df068c31ca3a..5fc4bb0d5940 100644 --- a/Documentation/btrfs-dedupe-inband.asciidoc +++ b/Documentation/btrfs-dedupe-inband.asciidoc @@ -86,6 +86,13 @@ 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. +*reconfigure* [options] :: +Re-configure in-band de-duplication parameters of a filesystem. ++ +In-band de-duplication must be enbaled first before re-configuration. ++ +[Options] are the same with 'btrfs dedupe-inband enable'. + *status* :: Show current in-band de-duplication status of a filesystem. diff --git a/cmds-dedupe-ib.c b/cmds-dedupe-ib.c index 854cbda131a3..925d5a8f756a 100644 --- a/cmds-dedupe-ib.c +++ b/cmds-dedupe-ib.c @@ -56,7 +56,6 @@ static const char * const cmd_dedupe_ib_enable_usage[] = { NULL }; - #define report_fatal_parameter(dargs, old, member, type, err_val, fmt) \ ({ \ if (dargs->member != old->member && \ @@ -88,6 +87,12 @@ static void report_parameter_error(struct btrfs_ioctl_dedupe_args *dargs, } report_option_parameter(dargs, old, flags, u8, -1, x); } + + if (dargs->status == 0 && old->cmd == BTRFS_DEDUPE_CTL_RECONF) { + error("must enable dedupe before reconfiguration"); + return; + } + if (report_fatal_parameter(dargs, old, cmd, u16, -1, u) || report_fatal_parameter(dargs, old, blocksize, u64, -1, llu) || report_fatal_parameter(dargs, old, backend, u16, -1, u) || @@ -100,14 +105,17 @@ static void report_parameter_error(struct btrfs_ioctl_dedupe_args *dargs, old->limit_nr, old->limit_mem); } -static int cmd_dedupe_ib_enable(int argc, char **argv) +static int enable_reconfig_dedupe(int argc, char **argv, int reconf) { int ret; int fd = -1; char *path; u64 blocksize = BTRFS_DEDUPE_BLOCKSIZE_DEFAULT; + int blocksize_set = 0; u16 hash_algo = BTRFS_DEDUPE_HASH_SHA256; + int hash_algo_set = 0; u16 backend = BTRFS_DEDUPE_BACKEND_INMEMORY; + int backend_set = 0; u64 limit_nr = 0; u64 limit_mem = 0; u64 sys_mem = 0; @@ -129,20 +137,22 @@ static int cmd_dedupe_ib_enable(int argc, char **argv) { NULL, 0, NULL, 0} }; - c = getopt_long(argc, argv, "s:b:a:l:m:", long_options, NULL); + c = getopt_long(argc, argv, "s:b:a:l:m:f", long_options, NULL); if (c < 0) break; switch (c) { case 's': - if (!strcasecmp("inmemory", optarg)) + if (!strcasecmp("inmemory", optarg)) { backend = BTRFS_DEDUPE_BACKEND_INMEMORY; - else { + backend_set = 1; + } else { error("unsupported dedupe backend: %s", optarg); exit(1); } break; case 'b': blocksize = parse_size(optarg); + blocksize_set = 1; break; case 'a': if (strcmp("sha256", optarg)) { @@ -226,26 +236,40 @@ static int cmd_dedupe_ib_enable(int argc, char **argv) return 1; } memset(&dargs, -1, sizeof(dargs)); - dargs.cmd = BTRFS_DEDUPE_CTL_ENABLE; - dargs.blocksize = blocksize; - dargs.hash_algo = hash_algo; - dargs.limit_nr = limit_nr; - dargs.limit_mem = limit_mem; - dargs.backend = backend; - if (force) - dargs.flags |= BTRFS_DEDUPE_FLAG_FORCE; - else - dargs.flags = 0; + if (reconf) { + dargs.cmd = BTRFS_DEDUPE_CTL_RECONF; + if (blocksize_set) + dargs.blocksize = blocksize; + if (hash_algo_set) + dargs.hash_algo = hash_algo; + if (backend_set) + dargs.backend = backend; + dargs.limit_nr = limit_nr; + dargs.limit_mem = limit_mem; + } else { + dargs.cmd = BTRFS_DEDUPE_CTL_ENABLE; + dargs.blocksize = blocksize; + dargs.hash_algo = hash_algo; + dargs.limit_nr = limit_nr; + dargs.limit_mem = limit_mem; + dargs.backend = backend; + if (force) + dargs.flags |= BTRFS_DEDUPE_FLAG_FORCE; + else + dargs.flags = 0; + } memcpy(&backup, &dargs, sizeof(dargs)); ret = ioctl(fd, BTRFS_IOC_DEDUPE_CTL, &dargs); if (ret < 0) { - error("failed to enable inband deduplication: %s", + error("failed to (%s) inband deduplication: %s", + reconf ? "reconfigure" : "enable", strerror(errno)); report_parameter_error(&dargs, &backup); ret = 1; goto out; } + report_parameter_error(&dargs, &backup); ret = 0; mem_check: if (!force && dargs.limit_mem > sys_mem / 4) { @@ -261,6 +285,10 @@ out: close_file_or_dir(fd, dirstream); return ret; } +static int cmd_dedupe_ib_enable(int argc, char **argv) +{ + return enable_reconfig_dedupe(argc, argv, 0); +} static const char * const cmd_dedupe_ib_disable_usage[] = { "btrfs dedupe disable ", @@ -381,6 +409,19 @@ out: return ret; } +static int cmd_dedupe_ib_reconf(int argc, char **argv) +{ + return enable_reconfig_dedupe(argc, argv, 1); +} + +static const char * const cmd_dedupe_ib_reconf_usage[] = { + "btrfs dedupe-inband reconfigure [options] ", + "Reconfigure in-band(write time) de-duplication of a btrfs.", + "", + "Options are the same as 'btrfs dedupe-inband enable'", + NULL +}; + 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, @@ -389,6 +430,8 @@ const struct cmd_group dedupe_ib_cmd_group = { NULL, 0}, { "status", cmd_dedupe_ib_status, cmd_dedupe_ib_status_usage, NULL, 0}, + { "reconfigure", cmd_dedupe_ib_reconf, + cmd_dedupe_ib_reconf_usage, NULL, 0}, NULL_CMD_STRUCT } }; -- 2.18.0