From: Qu Wenruo <quwen...@cn.fujitsu.com> Add disable subcommand for dedupe command group.
Signed-off-by: Qu Wenruo <quwen...@cn.fujitsu.com> Signed-off-by: Lu Fengqi <lufq.f...@cn.fujitsu.com> --- Documentation/btrfs-dedupe-inband.asciidoc | 5 +++ btrfs-completion | 2 +- cmds-dedupe-ib.c | 41 ++++++++++++++++++++++ 3 files changed, 47 insertions(+), 1 deletion(-) diff --git a/Documentation/btrfs-dedupe-inband.asciidoc b/Documentation/btrfs-dedupe-inband.asciidoc index d895aafbcf45..3452f690e3e5 100644 --- a/Documentation/btrfs-dedupe-inband.asciidoc +++ b/Documentation/btrfs-dedupe-inband.asciidoc @@ -22,6 +22,11 @@ use with caution. SUBCOMMAND ---------- +*disable* <path>:: +Disable in-band de-duplication for a filesystem. ++ +This will trash all stored dedupe hash. ++ *enable* [options] <path>:: Enable in-band de-duplication for a filesystem. + diff --git a/btrfs-completion b/btrfs-completion index cfdf70966e47..a74a23f42022 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_inband='enable' + commands_dedupe_inband='enable disable' 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 4d499677d9ae..91b6fe234043 100644 --- a/cmds-dedupe-ib.c +++ b/cmds-dedupe-ib.c @@ -259,10 +259,51 @@ out: return ret; } +static const char * const cmd_dedupe_ib_disable_usage[] = { + "btrfs dedupe-inband disable <path>", + "Disable in-band(write time) de-duplication of a btrfs.", + NULL +}; + +static int cmd_dedupe_ib_disable(int argc, char **argv) +{ + struct btrfs_ioctl_dedupe_args dargs; + DIR *dirstream; + char *path; + int fd; + int ret; + + if (check_argc_exact(argc, 2)) + usage(cmd_dedupe_ib_disable_usage); + + path = argv[1]; + fd = open_file_or_dir(path, &dirstream); + if (fd < 0) { + error("failed to open file or directory: %s", path); + return 1; + } + memset(&dargs, 0, sizeof(dargs)); + dargs.cmd = BTRFS_DEDUPE_CTL_DISABLE; + + ret = ioctl(fd, BTRFS_IOC_DEDUPE_CTL, &dargs); + if (ret < 0) { + error("failed to disable inband deduplication: %m"); + ret = 1; + goto out; + } + ret = 0; + +out: + close_file_or_dir(fd, dirstream); + return 0; +} + 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}, NULL_CMD_STRUCT } }; -- 2.18.0