From: Qu Wenruo <quwen...@cn.fujitsu.com>
Add status subcommand for dedupe command group.
Signed-off-by: Qu Wenruo <quwen...@cn.fujitsu.com>
---
Documentation/btrfs-dedupe-inband.asciidoc | 3 +
btrfs-completion | 2 +-
cmds-dedupe-ib.c | 81 ++++++++++++++++++++++
3 files changed, 85 insertions(+), 1 deletion(-)
diff --git a/Documentation/btrfs-dedupe-inband.asciidoc
b/Documentation/btrfs-dedupe-inband.asciidoc
index de32eb97d9dd..df068c31ca3a 100644
--- a/Documentation/btrfs-dedupe-inband.asciidoc
+++ b/Documentation/btrfs-dedupe-inband.asciidoc
@@ -86,6 +86,9 @@ 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.
+*status* <path>::
+Show current in-band de-duplication status of a filesystem.
+
BACKENDS
--------
Btrfs in-band de-duplication will support different storage backends, with
diff --git a/btrfs-completion b/btrfs-completion
index 2f113e01fb01..c8e67b459341 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='enable disable'
+ commands_dedupe='enable disable status'
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 031766c1d91c..854cbda131a3 100644
--- a/cmds-dedupe-ib.c
+++ b/cmds-dedupe-ib.c
@@ -302,12 +302,93 @@ out:
return 0;
}
+static const char * const cmd_dedupe_ib_status_usage[] = {
+ "btrfs dedupe status <path>",
+ "Show current in-band(write time) de-duplication status of a btrfs.",
+ NULL
+};
+
+static int cmd_dedupe_ib_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_ib_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_algo == BTRFS_DEDUPE_HASH_SHA256)
+ printf("Hash algorithm:\t\tSHA-256\n");
+ else
+ printf("Hash algorithm:\t\tUnrecognized(%x)\n",
+ dargs.hash_algo);
+
+ if (dargs.backend == BTRFS_DEDUPE_BACKEND_INMEMORY) {
+ printf("Backend:\t\tIn-memory\n");
+ print_limit = 1;
+ } 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_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},
+ { "status", cmd_dedupe_ib_status, cmd_dedupe_ib_status_usage,
+ NULL, 0},
NULL_CMD_STRUCT
}
};
--
2.17.0
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