Add status subcommand for dedupe command group.
Signed-off-by: Qu Wenruo <quwen...@cn.fujitsu.com>
---
Documentation/btrfs-dedupe.asciidoc | 3 ++
btrfs-completion | 2 +-
cmds-dedupe.c | 84 +++++++++++++++++++++++++++++++++++++
3 files changed, 88 insertions(+), 1 deletion(-)
diff --git a/Documentation/btrfs-dedupe.asciidoc
b/Documentation/btrfs-dedupe.asciidoc
index 28fe05f..5a5bf52 100644
--- a/Documentation/btrfs-dedupe.asciidoc
+++ b/Documentation/btrfs-dedupe.asciidoc
@@ -73,6 +73,9 @@ WARNING: Too large value for '-l' or '-m' will easily trigger
OOM.
Please use with caution according to system memory or use 'ondisk' backend
if memory usage is critical.
+*status* <path>::
+Show current in-band de-duplication status of a filesystem.
+
BACKENDS
--------
Btrfs in-band de-duplication support two different backends with their own
diff --git a/btrfs-completion b/btrfs-completion
index 9a6c73b..fbaae0c 100644
--- a/btrfs-completion
+++ b/btrfs-completion
@@ -40,7 +40,7 @@ _btrfs()
commands_property='get set list'
commands_quota='enable disable rescan'
commands_qgroup='assign remove create destroy show limit'
- commands_dedupe='enable disable'
+ commands_dedupe='enable disable status'
commands_replace='start status cancel'
if [[ "$cur" == -* && $cword -le 3 && "$cmd" != "help" ]]; then
diff --git a/cmds-dedupe.c b/cmds-dedupe.c
index 64ac0f2..8005b6e 100644
--- a/cmds-dedupe.c
+++ b/cmds-dedupe.c
@@ -230,11 +230,95 @@ out:
return 0;
}
+static const char * const cmd_dedupe_status_usage[] = {
+ "btrfs dedupe status <path>",
+ "Show current in-band(write time) de-duplication status of a btrfs.",
+ NULL
+};
+
+static int cmd_dedupe_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_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_type == BTRFS_DEDUPE_HASH_SHA256)
+ printf("Hash algorithm:\t\tSHA-256\n");
+ else
+ printf("Hash algorithm:\t\tUnrecognized(%x)\n",
+ dargs.hash_type);
+
+ if (dargs.backend == BTRFS_DEDUPE_BACKEND_INMEMORY) {
+ printf("Backend:\t\tIn-memory\n");
+ print_limit = 1;
+ } else if (dargs.backend == BTRFS_DEDUPE_BACKEND_ONDISK) {
+ printf("Backend:\t\tOn-disk\n");
+ print_limit = 0;
+ } 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_cmd_group = {
dedupe_cmd_group_usage, dedupe_cmd_group_info, {
{ "enable", cmd_dedupe_enable, cmd_dedupe_enable_usage, NULL,
0},
{ "disable", cmd_dedupe_disable, cmd_dedupe_disable_usage,
NULL, 0},
+ { "status", cmd_dedupe_status, cmd_dedupe_status_usage,
+ NULL, 0},
NULL_CMD_STRUCT
}
};
--
2.7.4
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