This aims to add 'btrfs filesystem dedup-register', and it can be used
to enable dedup on a filesystem.
Signed-off-by: Liu Bo <bo.li.liu@xxxxxxxxxx>
---
cmds-filesystem.c | 36 ++++++++++++++++++++++++++++++++++++
ioctl.h | 1 +
2 files changed, 37 insertions(+), 0 deletions(-)
diff --git a/cmds-filesystem.c b/cmds-filesystem.c
index 3f386e2..aa21cf6 100644
--- a/cmds-filesystem.c
+++ b/cmds-filesystem.c
@@ -515,6 +515,41 @@ static int cmd_label(int argc, char **argv)
return get_label(argv[1]);
}
+static const char * const cmd_dedup_usage[] = {
+ "btrfs filesystem dedup-register <path>",
+ "Register a dedup tree",
+ NULL
+};
+
+static int cmd_dedup(int argc, char **argv)
+{
+ int fd, res, e;
+ char *path;
+
+ if (check_argc_exact(argc, 2))
+ usage(cmd_dedup_usage);
+
+ path = argv[1];
+
+ fd = open_file_or_dir(path);
+ if (fd < 0) {
+ fprintf(stderr, "ERROR: can't access to '%s'\n", path);
+ return 12;
+ }
+
+ printf("register dedup on '%s'\n", path);
+ res = ioctl(fd, BTRFS_IOC_DEDUP_REGISTER);
+ e = errno;
+ close(fd);
+ if( res < 0 ){
+ fprintf(stderr, "ERROR: unable to register dedup '%s' - %s\n",
+ path, strerror(e));
+ return 32;
+ }
+
+ return 0;
+}
+
const struct cmd_group filesystem_cmd_group = {
filesystem_cmd_group_usage, NULL, {
{ "df", cmd_df, cmd_df_usage, NULL, 0 },
@@ -524,6 +559,7 @@ const struct cmd_group filesystem_cmd_group = {
{ "balance", cmd_balance, NULL, &balance_cmd_group, 1 },
{ "resize", cmd_resize, cmd_resize_usage, NULL, 0 },
{ "label", cmd_label, cmd_label_usage, NULL, 0 },
+ { "dedup-register", cmd_dedup, cmd_dedup_usage, NULL, 0 },
{ 0, 0, 0, 0, 0 },
}
};
diff --git a/ioctl.h b/ioctl.h
index e841913..1bea98a 100644
--- a/ioctl.h
+++ b/ioctl.h
@@ -528,6 +528,7 @@ struct btrfs_ioctl_clone_range_args {
struct btrfs_ioctl_get_dev_stats)
#define BTRFS_IOC_DEV_REPLACE _IOWR(BTRFS_IOCTL_MAGIC, 53, \
struct btrfs_ioctl_dev_replace_args)
+#define BTRFS_IOC_DEDUP_REGISTER _IO(BTRFS_IOCTL_MAGIC, 54)
#ifdef __cplusplus
}
--
1.7.7
--
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