Add disable subcommand for dedup command group.
Signed-off-by: Qu Wenruo <quwenruo@xxxxxxxxxxxxxx>
---
Documentation/btrfs-dedup.asciidoc | 5 +++++
cmds-dedup.c | 42 ++++++++++++++++++++++++++++++++++++++
2 files changed, 47 insertions(+)
diff --git a/Documentation/btrfs-dedup.asciidoc b/Documentation/btrfs-dedup.asciidoc
index 43d2fb7..458df62 100644
--- a/Documentation/btrfs-dedup.asciidoc
+++ b/Documentation/btrfs-dedup.asciidoc
@@ -21,6 +21,11 @@ use with caution.
SUBCOMMAND
----------
+*disable* <path>::
+Disable in-band de-duplication for a filesystem.
++
+This will trash all stored dedup hash.
++
*enable* [options] <path>::
Enable in-band de-duplication for a filesystem.
+
diff --git a/cmds-dedup.c b/cmds-dedup.c
index 1da416f..c85bb5b 100644
--- a/cmds-dedup.c
+++ b/cmds-dedup.c
@@ -173,9 +173,51 @@ out:
return ret;
}
+static const char * const cmd_dedup_disable_usage[] = {
+ "btrfs dedup disable <path>",
+ "Disable in-band(write time) de-duplication of a btrfs.",
+ NULL
+};
+
+static int cmd_dedup_disable(int argc, char **argv)
+{
+ struct btrfs_ioctl_dedup_args dargs;
+ DIR *dirstream;
+ char *path;
+ int fd;
+ int ret;
+
+ if (check_argc_exact(argc, 2))
+ usage(cmd_dedup_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_DEDUP_CTL_DISABLE;
+
+ ret = ioctl(fd, BTRFS_IOC_DEDUP_CTL, &dargs);
+ if (ret < 0) {
+ error("failed to disable inband deduplication: %s",
+ strerror(errno));
+ ret = 1;
+ goto out;
+ }
+ ret = 0;
+
+out:
+ close_file_or_dir(fd, dirstream);
+ return 0;
+}
+
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},
NULL_CMD_STRUCT
}
};
--
2.7.1
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