Timofey Titovets
2014-Aug-11 00:17 UTC
[RFC PATCH] btrfs-progs: Move btrfstune to btrfs device tune
Good time of day,
According to https://btrfs.wiki.kernel.org/index.php/Project_ideas#btrfs
Quote:
merge functionality of btrfstune, eg. under btrfs dev set-seed /dev/
(discuss the command name though)
This patch is just code move
After, user can tune btrfs parameters through:
btrfs dev tune -xr /dev/sda2
Also i merge two functions in one:
static int enable_extrefs_flag(struct btrfs_root *root)
and
static int enable_skinny_metadata(struct btrfs_root *root)
to
static void enable_flag(struct btrfs_root *root, u64 flag)
Where flag is:
BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA
BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF
Because function is identical.
P.S.
I write this patch on branch:
git://repo.or.cz/btrfs-progs-unstable/devel.git
But i think, what it can be safety applied on stable branch.
If it needed, i can redo and resend patch.
P.S.S
If it needed, i can move seed function in separated command, like in
project ideas (btrfs dev set-seed /dev/ or something else).
And if seed is same as readonly, may be command must named like
"readonly" 1/0 <dev>?
Signed-off-by: Timofey Titovets <nefelim4ag@gmail.com>
---
Documentation/Makefile | 3 +-
Documentation/btrfs-device.txt | 19 +++-
Makefile | 10 +--
btrfstune.c | 197
-----------------------------------------
cmds-device.c | 156 ++++++++++++++++++++++++++++++++
5 files changed, 177 insertions(+), 208 deletions(-)
diff --git a/Documentation/Makefile b/Documentation/Makefile
index 45299bb..75f50a2 100644
--- a/Documentation/Makefile
+++ b/Documentation/Makefile
@@ -9,7 +9,6 @@ MAN8_TXT += btrfs-find-root.txt
MAN8_TXT += btrfs-image.txt
MAN8_TXT += btrfs-map-logical.txt
MAN8_TXT += btrfs-show-super.txt
-MAN8_TXT += btrfstune.txt
MAN8_TXT += btrfs-zero-log.txt
MAN8_TXT += fsck.btrfs.txt
MAN8_TXT += mkfs.btrfs.txt
@@ -82,7 +81,7 @@ clean:
%.8.gz : %.8
$(QUIET_GZIP)$(GZIP) -n -c $< > $@
-%.8 : %.xml
+%.8 : %.xml
$(QUIET_XMLTO)$(RM) $@ && \
$(XMLTO) -m $(MANPAGE_XSL) $(XMLTO_EXTRA) man $<
%.xml : %.txt asciidoc.conf
diff --git a/Documentation/btrfs-device.txt b/Documentation/btrfs-device.txt
index 0f7917d..8f21672 100644
--- a/Documentation/btrfs-device.txt
+++ b/Documentation/btrfs-device.txt
@@ -80,10 +80,10 @@ Remove device(s) from a filesystem identified by
<path>.
*scan* [(--all-devices|-d)|<device> [<device>...]]::
Scan devices for a btrfs filesystem.
+
-If one or more devices are passed, these are scanned for a btrfs
filesystem.
+If one or more devices are passed, these are scanned for a btrfs
filesystem.
If no devices are passed, btrfs uses block devices containing btrfs
filesystem as listed by blkid.
-Finally, if '--all-devices' or '-d' is passed, all the devices
under
/dev are
+Finally, if '--all-devices' or '-d' is passed, all the devices
under
/dev are
scanned.
*ready* <device>::
@@ -98,6 +98,21 @@ identified by <path> or for a single <device>.
-z::::
Reset stats to zero after reading them.
+*tune* [options] <dev>::
+Used to tune various btrfs filesystem parameters, you can enable
+some extended features for btrfs and set seeding flag.
++
+`Options`
++
+-S <value>::
+Updates the seeding value, it forces a fs readonly so that you can use
it to
+build other filesystems.
+-r::
+Enable extended inode refs.
+-x::
+Enable skinny metadata extent refs.
+
+
EXIT STATUS
-----------
*btrfs device* returns a zero exist status if it succeeds. Non zero is
diff --git a/Makefile b/Makefile
index 76565e8..28e190f 100644
--- a/Makefile
+++ b/Makefile
@@ -48,7 +48,7 @@ MAKEOPTS = --no-print-directory Q=$(Q)
progs = mkfs.btrfs btrfs-debug-tree btrfsck \
btrfs btrfs-map-logical btrfs-image btrfs-zero-log btrfs-convert \
- btrfs-find-root btrfstune btrfs-show-super
+ btrfs-find-root btrfs-show-super
# external libs required by various binaries; for btrfs-foo,
# specify btrfs_foo_libs = <list of libs>; see $($(subst...)) rules
below
@@ -85,7 +85,7 @@ lib_links = libbtrfs.so.0 libbtrfs.so
headers = $(libbtrfs_headers)
# make C=1 to enable sparse
-check_defs := .cc-defines.h
+check_defs := .cc-defines.h
ifdef C
#
# We're trying to use sparse against glibc headers which go wild
@@ -200,10 +200,6 @@ mkfs.btrfs.static: $(static_objects) mkfs.static.o
$(static_libbtrfs_objects)
$(Q)$(CC) $(STATIC_CFLAGS) -o mkfs.btrfs.static mkfs.static.o
$(static_objects) \
$(static_libbtrfs_objects) $(STATIC_LDFLAGS) $(STATIC_LIBS)
-btrfstune: $(objects) $(libs) btrfstune.o
- @echo " [LD] $@"
- $(Q)$(CC) $(CFLAGS) -o btrfstune $(objects) btrfstune.o $(LDFLAGS) $(LIBS)
-
dir-test: $(objects) $(libs) dir-test.o
@echo " [LD] $@"
$(Q)$(CC) $(CFLAGS) -o dir-test $(objects) dir-test.o $(LDFLAGS) $(LIBS)
@@ -228,7 +224,7 @@ clean-all: clean-doc clean
clean: $(CLEANDIRS)
@echo "Cleaning"
$(Q)rm -f $(progs) cscope.out *.o *.o.d btrfs-convert btrfs-image
btrfs-select-super \
- btrfs-zero-log btrfstune dir-test ioctl-test quick-test
send-test btrfsck \
+ btrfs-zero-log dir-test ioctl-test quick-test send-test btrfsck \
btrfs.static mkfs.btrfs.static btrfs-calc-size \
version.h $(check_defs) \
$(libs) $(lib_links)
diff --git a/btrfstune.c b/btrfstune.c
deleted file mode 100644
index 2c26fe9..0000000
--- a/btrfstune.c
+++ /dev/null
@@ -1,197 +0,0 @@
-/*
- * Copyright (C) 2008 Oracle. All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License v2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- */
-
-#define _XOPEN_SOURCE 500
-#define _GNU_SOURCE 1
-#include <stdio.h>
-#include <stdlib.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <unistd.h>
-#include <dirent.h>
-#include "kerncompat.h"
-#include "ctree.h"
-#include "disk-io.h"
-#include "transaction.h"
-#include "utils.h"
-#include "version.h"
-
-static char *device;
-
-static int update_seeding_flag(struct btrfs_root *root, int set_flag)
-{
- struct btrfs_trans_handle *trans;
- struct btrfs_super_block *disk_super;
- u64 super_flags;
-
- disk_super = root->fs_info->super_copy;
- super_flags = btrfs_super_flags(disk_super);
- if (set_flag) {
- if (super_flags & BTRFS_SUPER_FLAG_SEEDING) {
- fprintf(stderr, "seeding flag is already set on %s\n",
- device);
- return 1;
- }
- super_flags |= BTRFS_SUPER_FLAG_SEEDING;
- } else {
- if (!(super_flags & BTRFS_SUPER_FLAG_SEEDING)) {
- fprintf(stderr, "seeding flag is not set on %s\n",
- device);
- return 1;
- }
- super_flags &= ~BTRFS_SUPER_FLAG_SEEDING;
- }
-
- trans = btrfs_start_transaction(root, 1);
- btrfs_set_super_flags(disk_super, super_flags);
- btrfs_commit_transaction(trans, root);
-
- return 0;
-}
-
-static int enable_extrefs_flag(struct btrfs_root *root)
-{
- struct btrfs_trans_handle *trans;
- struct btrfs_super_block *disk_super;
- u64 super_flags;
-
- disk_super = root->fs_info->super_copy;
- super_flags = btrfs_super_incompat_flags(disk_super);
- super_flags |= BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF;
- trans = btrfs_start_transaction(root, 1);
- btrfs_set_super_incompat_flags(disk_super, super_flags);
- btrfs_commit_transaction(trans, root);
-
- return 0;
-}
-
-static int enable_skinny_metadata(struct btrfs_root *root)
-{
- struct btrfs_trans_handle *trans;
- struct btrfs_super_block *disk_super;
- u64 super_flags;
-
- disk_super = root->fs_info->super_copy;
- super_flags = btrfs_super_incompat_flags(disk_super);
- super_flags |= BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA;
- trans = btrfs_start_transaction(root, 1);
- btrfs_set_super_incompat_flags(disk_super, super_flags);
- btrfs_commit_transaction(trans, root);
-
- return 0;
-}
-
-static void print_usage(void)
-{
- fprintf(stderr, "usage: btrfstune [options] device\n");
- fprintf(stderr, "\t-S value\tenable/disable seeding\n");
- fprintf(stderr, "\t-r \t\tenable extended inode refs\n");
- fprintf(stderr, "\t-x enable skinny metadata extent refs\n");
-}
-
-int main(int argc, char *argv[])
-{
- struct btrfs_root *root;
- int success = 0;
- int extrefs_flag = 0;
- int seeding_flag = 0;
- u64 seeding_value = 0;
- int skinny_flag = 0;
- int ret;
-
- optind = 1;
- while(1) {
- int c = getopt(argc, argv, "S:rx");
- if (c < 0)
- break;
- switch(c) {
- case 'S':
- seeding_flag = 1;
- seeding_value = arg_strtou64(optarg);
- break;
- case 'r':
- extrefs_flag = 1;
- break;
- case 'x':
- skinny_flag = 1;
- break;
- default:
- print_usage();
- return 1;
- }
- }
-
- argc = argc - optind;
- device = argv[optind];
- if (argc != 1) {
- print_usage();
- return 1;
- }
-
- if (!(seeding_flag + extrefs_flag + skinny_flag)) {
- fprintf(stderr,
- "ERROR: At least one option should be assigned.\n");
- print_usage();
- return 1;
- }
-
- ret = check_mounted(device);
- if (ret < 0) {
- fprintf(stderr, "Could not check mount status: %s\n",
- strerror(-ret));
- return 1;
- } else if (ret) {
- fprintf(stderr, "%s is mounted\n", device);
- return 1;
- }
-
- root = open_ctree(device, 0, OPEN_CTREE_WRITES);
-
- if (!root) {
- fprintf(stderr, "Open ctree failed\n");
- return 1;
- }
-
- if (seeding_flag) {
- ret = update_seeding_flag(root, seeding_value);
- if (!ret)
- success++;
- }
-
- if (extrefs_flag) {
- enable_extrefs_flag(root);
- success++;
- }
-
- if (skinny_flag) {
- enable_skinny_metadata(root);
- success++;
- }
-
- if (success > 0) {
- ret = 0;
- } else {
- root->fs_info->readonly = 1;
- ret = 1;
- fprintf(stderr, "btrfstune failed\n");
- }
- close_ctree(root);
-
- return ret;
-}
diff --git a/cmds-device.c b/cmds-device.c
index c8586a0..eea02a5 100644
--- a/cmds-device.c
+++ b/cmds-device.c
@@ -14,6 +14,9 @@
* Boston, MA 021110-1307, USA.
*/
+
+
+
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
@@ -24,10 +27,18 @@
#include <sys/stat.h>
#include <getopt.h>
+#define _XOPEN_SOURCE 500
+#define _GNU_SOURCE 1
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <dirent.h>
+
#include "kerncompat.h"
#include "ctree.h"
#include "ioctl.h"
#include "utils.h"
+#include "disk-io.h"
+#include "transaction.h"
#include "commands.h"
@@ -422,6 +433,150 @@ out:
return err;
}
+static const char * const cmd_dev_tune_usage[] = {
+ "btrfs device tune [options] device",
+ "-S value enable/disable seeding",
+ "-r enable extended inode refs",
+ "-x enable skinny metadata extent refs",
+ NULL
+};
+
+static int update_seeding_flag(struct btrfs_root *root, int set_flag,
char *device)
+{
+ struct btrfs_trans_handle *trans;
+ struct btrfs_super_block *disk_super;
+ u64 super_flags;
+
+ disk_super = root->fs_info->super_copy;
+ super_flags = btrfs_super_flags(disk_super);
+ if (set_flag) {
+ if (super_flags & BTRFS_SUPER_FLAG_SEEDING) {
+ fprintf(stderr, "seeding flag is already set on %s\n",
+ device);
+ return 1;
+ }
+ super_flags |= BTRFS_SUPER_FLAG_SEEDING;
+ } else {
+ if (!(super_flags & BTRFS_SUPER_FLAG_SEEDING)) {
+ fprintf(stderr, "seeding flag is not set on %s\n",
+ device);
+ return 1;
+ }
+ super_flags &= ~BTRFS_SUPER_FLAG_SEEDING;
+ }
+
+ trans = btrfs_start_transaction(root, 1);
+ btrfs_set_super_flags(disk_super, super_flags);
+ btrfs_commit_transaction(trans, root);
+
+ return 0;
+}
+
+static void enable_flag(struct btrfs_root *root, u64 flag)
+{
+ struct btrfs_trans_handle *trans;
+ struct btrfs_super_block *disk_super;
+ u64 super_flags;
+
+ disk_super = root->fs_info->super_copy;
+ super_flags = btrfs_super_incompat_flags(disk_super);
+ super_flags |= flag;
+ trans = btrfs_start_transaction(root, 1);
+ btrfs_set_super_incompat_flags(disk_super, super_flags);
+ btrfs_commit_transaction(trans, root);
+}
+
+static int cmd_dev_tune(int argc, char **argv)
+{
+ struct btrfs_root *root;
+ char *device;
+ int success = 0;
+ int extrefs_flag = 0;
+ int seeding_flag = 0;
+ u64 seeding_value = 0;
+ int skinny_flag = 0;
+ int ret;
+
+ optind = 1;
+ while(1) {
+ int c = getopt(argc, argv, "S:rx");
+ if (c < 0 && argc)
+ break;
+ switch(c) {
+ case 'S':
+ seeding_flag = 1;
+ seeding_value = arg_strtou64(optarg);
+ break;
+ case 'r':
+ extrefs_flag = 1;
+ break;
+ case 'x':
+ skinny_flag = 1;
+ break;
+ default:
+ usage(cmd_dev_tune_usage);
+ return 1;
+ }
+ }
+
+ argc = argc - optind;
+ device = argv[optind];
+ if (argc != 1) {
+ usage(cmd_dev_tune_usage);
+ return 1;
+ }
+
+ if (!(seeding_flag + extrefs_flag + skinny_flag)) {
+ fprintf(stderr,
+ "ERROR: At least one option should be assigned.\n");
+ return 1;
+ }
+
+ ret = check_mounted(device);
+ if (ret < 0) {
+ fprintf(stderr, "Could not check mount status: %s\n",
+ strerror(-ret));
+ return 1;
+ } else if (ret) {
+ fprintf(stderr, "%s is mounted\n", device);
+ return 1;
+ }
+
+ root = open_ctree(device, 0, OPEN_CTREE_WRITES);
+
+ if (!root) {
+ fprintf(stderr, "Open ctree failed\n");
+ return 1;
+ }
+
+ if (seeding_flag) {
+ ret = update_seeding_flag(root, seeding_value, device);
+ if (!ret)
+ success++;
+ }
+
+ if (extrefs_flag) {
+ enable_flag(root, BTRFS_FEATURE_INCOMPAT_EXTENDED_IREF);
+ success++;
+ }
+
+ if (skinny_flag) {
+ enable_flag(root, BTRFS_FEATURE_INCOMPAT_SKINNY_METADATA);
+ success++;
+ }
+
+ if (success > 0) {
+ ret = 0;
+ } else {
+ root->fs_info->readonly = 1;
+ ret = 1;
+ fprintf(stderr, "btrfs device tune failed\n");
+ }
+ close_ctree(root);
+
+ return ret;
+}
+
const struct cmd_group device_cmd_group = {
device_cmd_group_usage, NULL, {
{ "add", cmd_add_dev, cmd_add_dev_usage, NULL, 0 },
@@ -429,6 +584,7 @@ const struct cmd_group device_cmd_group = {
{ "scan", cmd_scan_dev, cmd_scan_dev_usage, NULL, 0 },
{ "ready", cmd_ready_dev, cmd_ready_dev_usage, NULL, 0 },
{ "stats", cmd_dev_stats, cmd_dev_stats_usage, NULL, 0 },
+ { "tune", cmd_dev_tune, cmd_dev_tune_usage, NULL, 0 },
NULL_CMD_STRUCT
}
};
--
Best regards,
Timofey.
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