forked from Mirrors/btrfs-progs
btrfs-progs: utils: split device scanning functions to own file
All helpers and data structures that are used for device registration. Signed-off-by: David Sterba <dsterba@suse.com>master
parent
ccbea0977b
commit
a62b7854de
2
Makefile
2
Makefile
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@ -135,7 +135,7 @@ objects = ctree.o disk-io.o kernel-lib/radix-tree.o extent-tree.o print-tree.o \
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inode.o file.o find-root.o free-space-tree.o common/help.o send-dump.o \
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inode.o file.o find-root.o free-space-tree.o common/help.o send-dump.o \
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common/fsfeatures.o kernel-lib/tables.o kernel-lib/raid56.o transaction.o \
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common/fsfeatures.o kernel-lib/tables.o kernel-lib/raid56.o transaction.o \
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delayed-ref.o common/format-output.o common/path-utils.o \
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delayed-ref.o common/format-output.o common/path-utils.o \
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common/device-utils.o
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common/device-utils.o common/device-scan.o
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cmds_objects = cmds/subvolume.o cmds/filesystem.o cmds/device.o cmds/scrub.o \
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cmds_objects = cmds/subvolume.o cmds/filesystem.o cmds/device.o cmds/scrub.o \
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cmds/inspect.o cmds/balance.o cmds/send.o cmds/receive.o \
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cmds/inspect.o cmds/balance.o cmds/send.o cmds/receive.o \
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cmds/quota.o cmds/qgroup.o cmds/replace.o check/main.o \
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cmds/quota.o cmds/qgroup.o cmds/replace.o check/main.o \
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@ -35,6 +35,7 @@
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#include "common/help.h"
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#include "common/help.h"
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#include "common/path-utils.h"
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#include "common/path-utils.h"
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#include "common/device-utils.h"
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#include "common/device-utils.h"
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#include "common/device-scan.h"
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#include "mkfs/common.h"
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#include "mkfs/common.h"
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static const char * const device_cmd_group_usage[] = {
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static const char * const device_cmd_group_usage[] = {
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@ -42,6 +42,7 @@
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#include "common/help.h"
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#include "common/help.h"
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#include "common/fsfeatures.h"
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#include "common/fsfeatures.h"
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#include "common/path-utils.h"
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#include "common/path-utils.h"
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#include "common/device-scan.h"
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/*
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/*
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* for btrfs fi show, we maintain a hash of fsids we've already printed.
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* for btrfs fi show, we maintain a hash of fsids we've already printed.
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@ -32,6 +32,7 @@
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#include "cmds/commands.h"
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#include "cmds/commands.h"
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#include "common/utils.h"
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#include "common/utils.h"
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#include "common/help.h"
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#include "common/help.h"
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#include "common/device-scan.h"
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static void print_extents(struct extent_buffer *eb)
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static void print_extents(struct extent_buffer *eb)
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{
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{
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@ -41,6 +41,7 @@
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#include "btrfs-list.h"
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#include "btrfs-list.h"
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#include "common/help.h"
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#include "common/help.h"
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#include "common/path-utils.h"
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#include "common/path-utils.h"
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#include "common/device-scan.h"
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static int wait_for_subvolume_cleaning(int fd, size_t count, uint64_t *ids,
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static int wait_for_subvolume_cleaning(int fd, size_t count, uint64_t *ids,
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int sleep_interval)
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int sleep_interval)
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@ -0,0 +1,408 @@
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/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License v2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#include "kerncompat.h"
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#include <sys/ioctl.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <errno.h>
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#include <dirent.h>
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#include <linux/limits.h>
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#include <blkid/blkid.h>
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#include <uuid/uuid.h>
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#include "common/path-utils.h"
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#include "common/device-scan.h"
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#include "common/messages.h"
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#include "common/utils.h"
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#include "common-defs.h"
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#include "ctree.h"
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#include "volumes.h"
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#include "disk-io.h"
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#include "ioctl.h"
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static int btrfs_scan_done = 0;
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/*
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* This function checks if the given input parameter is
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* an uuid or a path
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* return <0 : some error in the given input
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* return BTRFS_ARG_UNKNOWN: unknown input
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* return BTRFS_ARG_UUID: given input is uuid
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* return BTRFS_ARG_MNTPOINT: given input is path
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* return BTRFS_ARG_REG: given input is regular file
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* return BTRFS_ARG_BLKDEV: given input is block device
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*/
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int check_arg_type(const char *input)
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{
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uuid_t uuid;
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char path[PATH_MAX];
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if (!input)
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return -EINVAL;
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if (realpath(input, path)) {
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if (path_is_block_device(path) == 1)
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return BTRFS_ARG_BLKDEV;
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if (path_is_mount_point(path) == 1)
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return BTRFS_ARG_MNTPOINT;
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if (path_is_reg_file(path))
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return BTRFS_ARG_REG;
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return BTRFS_ARG_UNKNOWN;
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} else {
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return -errno;
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}
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if (strlen(input) == (BTRFS_UUID_UNPARSED_SIZE - 1) &&
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!uuid_parse(input, uuid))
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return BTRFS_ARG_UUID;
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return BTRFS_ARG_UNKNOWN;
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}
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int test_uuid_unique(char *fs_uuid)
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{
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int unique = 1;
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blkid_dev_iterate iter = NULL;
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blkid_dev dev = NULL;
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blkid_cache cache = NULL;
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if (blkid_get_cache(&cache, NULL) < 0) {
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printf("ERROR: lblkid cache get failed\n");
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return 1;
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}
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blkid_probe_all(cache);
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iter = blkid_dev_iterate_begin(cache);
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blkid_dev_set_search(iter, "UUID", fs_uuid);
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while (blkid_dev_next(iter, &dev) == 0) {
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dev = blkid_verify(cache, dev);
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if (dev) {
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unique = 0;
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break;
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}
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}
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blkid_dev_iterate_end(iter);
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blkid_put_cache(cache);
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return unique;
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}
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int btrfs_add_to_fsid(struct btrfs_trans_handle *trans,
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struct btrfs_root *root, int fd, const char *path,
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u64 device_total_bytes, u32 io_width, u32 io_align,
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u32 sectorsize)
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{
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struct btrfs_super_block *disk_super;
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struct btrfs_fs_info *fs_info = root->fs_info;
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struct btrfs_super_block *super = fs_info->super_copy;
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struct btrfs_device *device;
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struct btrfs_dev_item *dev_item;
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char *buf = NULL;
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u64 fs_total_bytes;
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u64 num_devs;
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int ret;
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device_total_bytes = (device_total_bytes / sectorsize) * sectorsize;
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device = calloc(1, sizeof(*device));
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if (!device) {
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ret = -ENOMEM;
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goto out;
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}
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buf = calloc(1, sectorsize);
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if (!buf) {
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ret = -ENOMEM;
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goto out;
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}
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disk_super = (struct btrfs_super_block *)buf;
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dev_item = &disk_super->dev_item;
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uuid_generate(device->uuid);
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device->devid = 0;
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device->type = 0;
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device->io_width = io_width;
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device->io_align = io_align;
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device->sector_size = sectorsize;
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device->fd = fd;
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device->writeable = 1;
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device->total_bytes = device_total_bytes;
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device->bytes_used = 0;
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device->total_ios = 0;
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device->dev_root = fs_info->dev_root;
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device->name = strdup(path);
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if (!device->name) {
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ret = -ENOMEM;
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goto out;
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}
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INIT_LIST_HEAD(&device->dev_list);
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ret = btrfs_add_device(trans, fs_info, device);
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if (ret)
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goto out;
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fs_total_bytes = btrfs_super_total_bytes(super) + device_total_bytes;
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btrfs_set_super_total_bytes(super, fs_total_bytes);
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num_devs = btrfs_super_num_devices(super) + 1;
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btrfs_set_super_num_devices(super, num_devs);
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memcpy(disk_super, super, sizeof(*disk_super));
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btrfs_set_super_bytenr(disk_super, BTRFS_SUPER_INFO_OFFSET);
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btrfs_set_stack_device_id(dev_item, device->devid);
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btrfs_set_stack_device_type(dev_item, device->type);
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btrfs_set_stack_device_io_align(dev_item, device->io_align);
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btrfs_set_stack_device_io_width(dev_item, device->io_width);
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btrfs_set_stack_device_sector_size(dev_item, device->sector_size);
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btrfs_set_stack_device_total_bytes(dev_item, device->total_bytes);
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btrfs_set_stack_device_bytes_used(dev_item, device->bytes_used);
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memcpy(&dev_item->uuid, device->uuid, BTRFS_UUID_SIZE);
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ret = pwrite(fd, buf, sectorsize, BTRFS_SUPER_INFO_OFFSET);
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BUG_ON(ret != sectorsize);
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free(buf);
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list_add(&device->dev_list, &fs_info->fs_devices->devices);
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device->fs_devices = fs_info->fs_devices;
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return 0;
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out:
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free(device);
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free(buf);
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return ret;
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}
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int btrfs_register_one_device(const char *fname)
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{
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struct btrfs_ioctl_vol_args args;
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int fd;
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int ret;
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fd = open("/dev/btrfs-control", O_RDWR);
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if (fd < 0) {
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warning(
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"failed to open /dev/btrfs-control, skipping device registration: %m");
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return -errno;
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}
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memset(&args, 0, sizeof(args));
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strncpy_null(args.name, fname);
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ret = ioctl(fd, BTRFS_IOC_SCAN_DEV, &args);
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if (ret < 0) {
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error("device scan failed on '%s': %m", fname);
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ret = -errno;
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}
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close(fd);
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return ret;
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}
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/*
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* Register all devices in the fs_uuid list created in the user
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* space. Ensure btrfs_scan_devices() is called before this func.
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*/
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int btrfs_register_all_devices(void)
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{
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int err = 0;
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int ret = 0;
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struct btrfs_fs_devices *fs_devices;
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struct btrfs_device *device;
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struct list_head *all_uuids;
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all_uuids = btrfs_scanned_uuids();
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list_for_each_entry(fs_devices, all_uuids, list) {
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list_for_each_entry(device, &fs_devices->devices, dev_list) {
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if (*device->name)
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err = btrfs_register_one_device(device->name);
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if (err)
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ret++;
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}
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}
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return ret;
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}
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int btrfs_device_already_in_root(struct btrfs_root *root, int fd,
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int super_offset)
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{
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struct btrfs_super_block *disk_super;
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char *buf;
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int ret = 0;
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buf = malloc(BTRFS_SUPER_INFO_SIZE);
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if (!buf) {
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ret = -ENOMEM;
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goto out;
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}
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ret = pread(fd, buf, BTRFS_SUPER_INFO_SIZE, super_offset);
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if (ret != BTRFS_SUPER_INFO_SIZE)
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goto brelse;
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ret = 0;
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disk_super = (struct btrfs_super_block *)buf;
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/*
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* Accept devices from the same filesystem, allow partially created
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* structures.
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*/
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if (btrfs_super_magic(disk_super) != BTRFS_MAGIC &&
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btrfs_super_magic(disk_super) != BTRFS_MAGIC_TEMPORARY)
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goto brelse;
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if (!memcmp(disk_super->fsid, root->fs_info->super_copy->fsid,
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BTRFS_FSID_SIZE))
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ret = 1;
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brelse:
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free(buf);
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out:
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return ret;
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}
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int is_seen_fsid(u8 *fsid, struct seen_fsid *seen_fsid_hash[])
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{
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u8 hash = fsid[0];
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int slot = hash % SEEN_FSID_HASH_SIZE;
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struct seen_fsid *seen = seen_fsid_hash[slot];
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while (seen) {
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if (memcmp(seen->fsid, fsid, BTRFS_FSID_SIZE) == 0)
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return 1;
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seen = seen->next;
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}
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return 0;
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}
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int add_seen_fsid(u8 *fsid, struct seen_fsid *seen_fsid_hash[],
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int fd, DIR *dirstream)
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{
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u8 hash = fsid[0];
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int slot = hash % SEEN_FSID_HASH_SIZE;
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struct seen_fsid *seen = seen_fsid_hash[slot];
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struct seen_fsid *alloc;
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if (!seen)
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goto insert;
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while (1) {
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if (memcmp(seen->fsid, fsid, BTRFS_FSID_SIZE) == 0)
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return -EEXIST;
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if (!seen->next)
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break;
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seen = seen->next;
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}
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insert:
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||||||
|
alloc = malloc(sizeof(*alloc));
|
||||||
|
if (!alloc)
|
||||||
|
return -ENOMEM;
|
||||||
|
|
||||||
|
alloc->next = NULL;
|
||||||
|
memcpy(alloc->fsid, fsid, BTRFS_FSID_SIZE);
|
||||||
|
alloc->fd = fd;
|
||||||
|
alloc->dirstream = dirstream;
|
||||||
|
|
||||||
|
if (seen)
|
||||||
|
seen->next = alloc;
|
||||||
|
else
|
||||||
|
seen_fsid_hash[slot] = alloc;
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
void free_seen_fsid(struct seen_fsid *seen_fsid_hash[])
|
||||||
|
{
|
||||||
|
int slot;
|
||||||
|
struct seen_fsid *seen;
|
||||||
|
struct seen_fsid *next;
|
||||||
|
|
||||||
|
for (slot = 0; slot < SEEN_FSID_HASH_SIZE; slot++) {
|
||||||
|
seen = seen_fsid_hash[slot];
|
||||||
|
while (seen) {
|
||||||
|
next = seen->next;
|
||||||
|
close_file_or_dir(seen->fd, seen->dirstream);
|
||||||
|
free(seen);
|
||||||
|
seen = next;
|
||||||
|
}
|
||||||
|
seen_fsid_hash[slot] = NULL;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
int btrfs_scan_devices(void)
|
||||||
|
{
|
||||||
|
int fd = -1;
|
||||||
|
int ret;
|
||||||
|
u64 num_devices;
|
||||||
|
struct btrfs_fs_devices *tmp_devices;
|
||||||
|
blkid_dev_iterate iter = NULL;
|
||||||
|
blkid_dev dev = NULL;
|
||||||
|
blkid_cache cache = NULL;
|
||||||
|
char path[PATH_MAX];
|
||||||
|
|
||||||
|
if (btrfs_scan_done)
|
||||||
|
return 0;
|
||||||
|
|
||||||
|
ret = blkid_get_cache(&cache, NULL);
|
||||||
|
if (ret < 0) {
|
||||||
|
errno = -ret;
|
||||||
|
error("blkid cache get failed: %m");
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
blkid_probe_all(cache);
|
||||||
|
iter = blkid_dev_iterate_begin(cache);
|
||||||
|
blkid_dev_set_search(iter, "TYPE", "btrfs");
|
||||||
|
while (blkid_dev_next(iter, &dev) == 0) {
|
||||||
|
dev = blkid_verify(cache, dev);
|
||||||
|
if (!dev)
|
||||||
|
continue;
|
||||||
|
/* if we are here its definitely a btrfs disk*/
|
||||||
|
strncpy_null(path, blkid_dev_devname(dev));
|
||||||
|
|
||||||
|
fd = open(path, O_RDONLY);
|
||||||
|
if (fd < 0) {
|
||||||
|
error("cannot open %s: %m", path);
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
ret = btrfs_scan_one_device(fd, path, &tmp_devices,
|
||||||
|
&num_devices, BTRFS_SUPER_INFO_OFFSET,
|
||||||
|
SBREAD_DEFAULT);
|
||||||
|
if (ret) {
|
||||||
|
errno = -ret;
|
||||||
|
error("cannot scan %s: %m", path);
|
||||||
|
close (fd);
|
||||||
|
continue;
|
||||||
|
}
|
||||||
|
|
||||||
|
close(fd);
|
||||||
|
}
|
||||||
|
blkid_dev_iterate_end(iter);
|
||||||
|
blkid_put_cache(cache);
|
||||||
|
|
||||||
|
btrfs_scan_done = 1;
|
||||||
|
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
|
@ -0,0 +1,46 @@
|
||||||
|
#ifndef __DEVICE_SCAN_H__
|
||||||
|
#define __DEVICE_SCAN_H__
|
||||||
|
|
||||||
|
#include "kerncompat.h"
|
||||||
|
#include "ioctl.h"
|
||||||
|
|
||||||
|
#define BTRFS_SCAN_MOUNTED (1ULL << 0)
|
||||||
|
#define BTRFS_SCAN_LBLKID (1ULL << 1)
|
||||||
|
|
||||||
|
#define BTRFS_UPDATE_KERNEL 1
|
||||||
|
|
||||||
|
#define BTRFS_ARG_UNKNOWN 0
|
||||||
|
#define BTRFS_ARG_MNTPOINT 1
|
||||||
|
#define BTRFS_ARG_UUID 2
|
||||||
|
#define BTRFS_ARG_BLKDEV 3
|
||||||
|
#define BTRFS_ARG_REG 4
|
||||||
|
|
||||||
|
#define SEEN_FSID_HASH_SIZE 256
|
||||||
|
|
||||||
|
struct btrfs_root;
|
||||||
|
struct btrfs_trans_handle;
|
||||||
|
struct seen_fsid;
|
||||||
|
struct DIR;
|
||||||
|
|
||||||
|
struct seen_fsid {
|
||||||
|
u8 fsid[BTRFS_FSID_SIZE];
|
||||||
|
struct seen_fsid *next;
|
||||||
|
DIR *dirstream;
|
||||||
|
int fd;
|
||||||
|
};
|
||||||
|
|
||||||
|
int btrfs_scan_devices(void);
|
||||||
|
int btrfs_register_one_device(const char *fname);
|
||||||
|
int btrfs_register_all_devices(void);
|
||||||
|
int btrfs_add_to_fsid(struct btrfs_trans_handle *trans,
|
||||||
|
struct btrfs_root *root, int fd, const char *path,
|
||||||
|
u64 device_total_bytes, u32 io_width, u32 io_align,
|
||||||
|
u32 sectorsize);
|
||||||
|
int btrfs_device_already_in_root(struct btrfs_root *root, int fd,
|
||||||
|
int super_offset);
|
||||||
|
int is_seen_fsid(u8 *fsid, struct seen_fsid *seen_fsid_hash[]);
|
||||||
|
int add_seen_fsid(u8 *fsid, struct seen_fsid *seen_fsid_hash[],
|
||||||
|
int fd, DIR *dirstream);
|
||||||
|
void free_seen_fsid(struct seen_fsid *seen_fsid_hash[]);
|
||||||
|
|
||||||
|
#endif
|
371
common/utils.c
371
common/utils.c
|
@ -50,133 +50,17 @@
|
||||||
#include "kernel-lib/crc32c.h"
|
#include "kernel-lib/crc32c.h"
|
||||||
#include "common/utils.h"
|
#include "common/utils.h"
|
||||||
#include "common/path-utils.h"
|
#include "common/path-utils.h"
|
||||||
|
#include "common/device-scan.h"
|
||||||
#include "volumes.h"
|
#include "volumes.h"
|
||||||
#include "ioctl.h"
|
#include "ioctl.h"
|
||||||
#include "cmds/commands.h"
|
#include "cmds/commands.h"
|
||||||
#include "mkfs/common.h"
|
#include "mkfs/common.h"
|
||||||
|
|
||||||
static int btrfs_scan_done = 0;
|
|
||||||
|
|
||||||
static int rand_seed_initialized = 0;
|
static int rand_seed_initialized = 0;
|
||||||
static unsigned short rand_seed[3];
|
static unsigned short rand_seed[3];
|
||||||
|
|
||||||
struct btrfs_config bconf;
|
struct btrfs_config bconf;
|
||||||
|
|
||||||
int test_uuid_unique(char *fs_uuid)
|
|
||||||
{
|
|
||||||
int unique = 1;
|
|
||||||
blkid_dev_iterate iter = NULL;
|
|
||||||
blkid_dev dev = NULL;
|
|
||||||
blkid_cache cache = NULL;
|
|
||||||
|
|
||||||
if (blkid_get_cache(&cache, NULL) < 0) {
|
|
||||||
printf("ERROR: lblkid cache get failed\n");
|
|
||||||
return 1;
|
|
||||||
}
|
|
||||||
blkid_probe_all(cache);
|
|
||||||
iter = blkid_dev_iterate_begin(cache);
|
|
||||||
blkid_dev_set_search(iter, "UUID", fs_uuid);
|
|
||||||
|
|
||||||
while (blkid_dev_next(iter, &dev) == 0) {
|
|
||||||
dev = blkid_verify(cache, dev);
|
|
||||||
if (dev) {
|
|
||||||
unique = 0;
|
|
||||||
break;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
blkid_dev_iterate_end(iter);
|
|
||||||
blkid_put_cache(cache);
|
|
||||||
|
|
||||||
return unique;
|
|
||||||
}
|
|
||||||
|
|
||||||
int btrfs_add_to_fsid(struct btrfs_trans_handle *trans,
|
|
||||||
struct btrfs_root *root, int fd, const char *path,
|
|
||||||
u64 device_total_bytes, u32 io_width, u32 io_align,
|
|
||||||
u32 sectorsize)
|
|
||||||
{
|
|
||||||
struct btrfs_super_block *disk_super;
|
|
||||||
struct btrfs_fs_info *fs_info = root->fs_info;
|
|
||||||
struct btrfs_super_block *super = fs_info->super_copy;
|
|
||||||
struct btrfs_device *device;
|
|
||||||
struct btrfs_dev_item *dev_item;
|
|
||||||
char *buf = NULL;
|
|
||||||
u64 fs_total_bytes;
|
|
||||||
u64 num_devs;
|
|
||||||
int ret;
|
|
||||||
|
|
||||||
device_total_bytes = (device_total_bytes / sectorsize) * sectorsize;
|
|
||||||
|
|
||||||
device = calloc(1, sizeof(*device));
|
|
||||||
if (!device) {
|
|
||||||
ret = -ENOMEM;
|
|
||||||
goto out;
|
|
||||||
}
|
|
||||||
buf = calloc(1, sectorsize);
|
|
||||||
if (!buf) {
|
|
||||||
ret = -ENOMEM;
|
|
||||||
goto out;
|
|
||||||
}
|
|
||||||
|
|
||||||
disk_super = (struct btrfs_super_block *)buf;
|
|
||||||
dev_item = &disk_super->dev_item;
|
|
||||||
|
|
||||||
uuid_generate(device->uuid);
|
|
||||||
device->devid = 0;
|
|
||||||
device->type = 0;
|
|
||||||
device->io_width = io_width;
|
|
||||||
device->io_align = io_align;
|
|
||||||
device->sector_size = sectorsize;
|
|
||||||
device->fd = fd;
|
|
||||||
device->writeable = 1;
|
|
||||||
device->total_bytes = device_total_bytes;
|
|
||||||
device->bytes_used = 0;
|
|
||||||
device->total_ios = 0;
|
|
||||||
device->dev_root = fs_info->dev_root;
|
|
||||||
device->name = strdup(path);
|
|
||||||
if (!device->name) {
|
|
||||||
ret = -ENOMEM;
|
|
||||||
goto out;
|
|
||||||
}
|
|
||||||
|
|
||||||
INIT_LIST_HEAD(&device->dev_list);
|
|
||||||
ret = btrfs_add_device(trans, fs_info, device);
|
|
||||||
if (ret)
|
|
||||||
goto out;
|
|
||||||
|
|
||||||
fs_total_bytes = btrfs_super_total_bytes(super) + device_total_bytes;
|
|
||||||
btrfs_set_super_total_bytes(super, fs_total_bytes);
|
|
||||||
|
|
||||||
num_devs = btrfs_super_num_devices(super) + 1;
|
|
||||||
btrfs_set_super_num_devices(super, num_devs);
|
|
||||||
|
|
||||||
memcpy(disk_super, super, sizeof(*disk_super));
|
|
||||||
|
|
||||||
btrfs_set_super_bytenr(disk_super, BTRFS_SUPER_INFO_OFFSET);
|
|
||||||
btrfs_set_stack_device_id(dev_item, device->devid);
|
|
||||||
btrfs_set_stack_device_type(dev_item, device->type);
|
|
||||||
btrfs_set_stack_device_io_align(dev_item, device->io_align);
|
|
||||||
btrfs_set_stack_device_io_width(dev_item, device->io_width);
|
|
||||||
btrfs_set_stack_device_sector_size(dev_item, device->sector_size);
|
|
||||||
btrfs_set_stack_device_total_bytes(dev_item, device->total_bytes);
|
|
||||||
btrfs_set_stack_device_bytes_used(dev_item, device->bytes_used);
|
|
||||||
memcpy(&dev_item->uuid, device->uuid, BTRFS_UUID_SIZE);
|
|
||||||
|
|
||||||
ret = pwrite(fd, buf, sectorsize, BTRFS_SUPER_INFO_OFFSET);
|
|
||||||
BUG_ON(ret != sectorsize);
|
|
||||||
|
|
||||||
free(buf);
|
|
||||||
list_add(&device->dev_list, &fs_info->fs_devices->devices);
|
|
||||||
device->fs_devices = fs_info->fs_devices;
|
|
||||||
return 0;
|
|
||||||
|
|
||||||
out:
|
|
||||||
free(device);
|
|
||||||
free(buf);
|
|
||||||
return ret;
|
|
||||||
}
|
|
||||||
|
|
||||||
int btrfs_make_root_dir(struct btrfs_trans_handle *trans,
|
int btrfs_make_root_dir(struct btrfs_trans_handle *trans,
|
||||||
struct btrfs_root *root, u64 objectid)
|
struct btrfs_root *root, u64 objectid)
|
||||||
{
|
{
|
||||||
|
@ -216,46 +100,6 @@ error:
|
||||||
return ret;
|
return ret;
|
||||||
}
|
}
|
||||||
|
|
||||||
/*
|
|
||||||
* This function checks if the given input parameter is
|
|
||||||
* an uuid or a path
|
|
||||||
* return <0 : some error in the given input
|
|
||||||
* return BTRFS_ARG_UNKNOWN: unknown input
|
|
||||||
* return BTRFS_ARG_UUID: given input is uuid
|
|
||||||
* return BTRFS_ARG_MNTPOINT: given input is path
|
|
||||||
* return BTRFS_ARG_REG: given input is regular file
|
|
||||||
* return BTRFS_ARG_BLKDEV: given input is block device
|
|
||||||
*/
|
|
||||||
int check_arg_type(const char *input)
|
|
||||||
{
|
|
||||||
uuid_t uuid;
|
|
||||||
char path[PATH_MAX];
|
|
||||||
|
|
||||||
if (!input)
|
|
||||||
return -EINVAL;
|
|
||||||
|
|
||||||
if (realpath(input, path)) {
|
|
||||||
if (path_is_block_device(path) == 1)
|
|
||||||
return BTRFS_ARG_BLKDEV;
|
|
||||||
|
|
||||||
if (path_is_mount_point(path) == 1)
|
|
||||||
return BTRFS_ARG_MNTPOINT;
|
|
||||||
|
|
||||||
if (path_is_reg_file(path))
|
|
||||||
return BTRFS_ARG_REG;
|
|
||||||
|
|
||||||
return BTRFS_ARG_UNKNOWN;
|
|
||||||
} else {
|
|
||||||
return -errno;
|
|
||||||
}
|
|
||||||
|
|
||||||
if (strlen(input) == (BTRFS_UUID_UNPARSED_SIZE - 1) &&
|
|
||||||
!uuid_parse(input, uuid))
|
|
||||||
return BTRFS_ARG_UUID;
|
|
||||||
|
|
||||||
return BTRFS_ARG_UNKNOWN;
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* Find the mount point for a mounted device.
|
* Find the mount point for a mounted device.
|
||||||
* On success, returns 0 with mountpoint in *mp.
|
* On success, returns 0 with mountpoint in *mp.
|
||||||
|
@ -486,91 +330,6 @@ struct pending_dir {
|
||||||
char name[PATH_MAX];
|
char name[PATH_MAX];
|
||||||
};
|
};
|
||||||
|
|
||||||
int btrfs_register_one_device(const char *fname)
|
|
||||||
{
|
|
||||||
struct btrfs_ioctl_vol_args args;
|
|
||||||
int fd;
|
|
||||||
int ret;
|
|
||||||
|
|
||||||
fd = open("/dev/btrfs-control", O_RDWR);
|
|
||||||
if (fd < 0) {
|
|
||||||
warning(
|
|
||||||
"failed to open /dev/btrfs-control, skipping device registration: %m");
|
|
||||||
return -errno;
|
|
||||||
}
|
|
||||||
memset(&args, 0, sizeof(args));
|
|
||||||
strncpy_null(args.name, fname);
|
|
||||||
ret = ioctl(fd, BTRFS_IOC_SCAN_DEV, &args);
|
|
||||||
if (ret < 0) {
|
|
||||||
error("device scan failed on '%s': %m", fname);
|
|
||||||
ret = -errno;
|
|
||||||
}
|
|
||||||
close(fd);
|
|
||||||
return ret;
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
|
||||||
* Register all devices in the fs_uuid list created in the user
|
|
||||||
* space. Ensure btrfs_scan_devices() is called before this func.
|
|
||||||
*/
|
|
||||||
int btrfs_register_all_devices(void)
|
|
||||||
{
|
|
||||||
int err = 0;
|
|
||||||
int ret = 0;
|
|
||||||
struct btrfs_fs_devices *fs_devices;
|
|
||||||
struct btrfs_device *device;
|
|
||||||
struct list_head *all_uuids;
|
|
||||||
|
|
||||||
all_uuids = btrfs_scanned_uuids();
|
|
||||||
|
|
||||||
list_for_each_entry(fs_devices, all_uuids, list) {
|
|
||||||
list_for_each_entry(device, &fs_devices->devices, dev_list) {
|
|
||||||
if (*device->name)
|
|
||||||
err = btrfs_register_one_device(device->name);
|
|
||||||
|
|
||||||
if (err)
|
|
||||||
ret++;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
return ret;
|
|
||||||
}
|
|
||||||
|
|
||||||
int btrfs_device_already_in_root(struct btrfs_root *root, int fd,
|
|
||||||
int super_offset)
|
|
||||||
{
|
|
||||||
struct btrfs_super_block *disk_super;
|
|
||||||
char *buf;
|
|
||||||
int ret = 0;
|
|
||||||
|
|
||||||
buf = malloc(BTRFS_SUPER_INFO_SIZE);
|
|
||||||
if (!buf) {
|
|
||||||
ret = -ENOMEM;
|
|
||||||
goto out;
|
|
||||||
}
|
|
||||||
ret = pread(fd, buf, BTRFS_SUPER_INFO_SIZE, super_offset);
|
|
||||||
if (ret != BTRFS_SUPER_INFO_SIZE)
|
|
||||||
goto brelse;
|
|
||||||
|
|
||||||
ret = 0;
|
|
||||||
disk_super = (struct btrfs_super_block *)buf;
|
|
||||||
/*
|
|
||||||
* Accept devices from the same filesystem, allow partially created
|
|
||||||
* structures.
|
|
||||||
*/
|
|
||||||
if (btrfs_super_magic(disk_super) != BTRFS_MAGIC &&
|
|
||||||
btrfs_super_magic(disk_super) != BTRFS_MAGIC_TEMPORARY)
|
|
||||||
goto brelse;
|
|
||||||
|
|
||||||
if (!memcmp(disk_super->fsid, root->fs_info->super_copy->fsid,
|
|
||||||
BTRFS_FSID_SIZE))
|
|
||||||
ret = 1;
|
|
||||||
brelse:
|
|
||||||
free(buf);
|
|
||||||
out:
|
|
||||||
return ret;
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* Note: this function uses a static per-thread buffer. Do not call this
|
* Note: this function uses a static per-thread buffer. Do not call this
|
||||||
* function more than 10 times within one argument list!
|
* function more than 10 times within one argument list!
|
||||||
|
@ -1347,79 +1106,6 @@ out:
|
||||||
return ret;
|
return ret;
|
||||||
}
|
}
|
||||||
|
|
||||||
int is_seen_fsid(u8 *fsid, struct seen_fsid *seen_fsid_hash[])
|
|
||||||
{
|
|
||||||
u8 hash = fsid[0];
|
|
||||||
int slot = hash % SEEN_FSID_HASH_SIZE;
|
|
||||||
struct seen_fsid *seen = seen_fsid_hash[slot];
|
|
||||||
|
|
||||||
while (seen) {
|
|
||||||
if (memcmp(seen->fsid, fsid, BTRFS_FSID_SIZE) == 0)
|
|
||||||
return 1;
|
|
||||||
|
|
||||||
seen = seen->next;
|
|
||||||
}
|
|
||||||
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
int add_seen_fsid(u8 *fsid, struct seen_fsid *seen_fsid_hash[],
|
|
||||||
int fd, DIR *dirstream)
|
|
||||||
{
|
|
||||||
u8 hash = fsid[0];
|
|
||||||
int slot = hash % SEEN_FSID_HASH_SIZE;
|
|
||||||
struct seen_fsid *seen = seen_fsid_hash[slot];
|
|
||||||
struct seen_fsid *alloc;
|
|
||||||
|
|
||||||
if (!seen)
|
|
||||||
goto insert;
|
|
||||||
|
|
||||||
while (1) {
|
|
||||||
if (memcmp(seen->fsid, fsid, BTRFS_FSID_SIZE) == 0)
|
|
||||||
return -EEXIST;
|
|
||||||
|
|
||||||
if (!seen->next)
|
|
||||||
break;
|
|
||||||
|
|
||||||
seen = seen->next;
|
|
||||||
}
|
|
||||||
|
|
||||||
insert:
|
|
||||||
alloc = malloc(sizeof(*alloc));
|
|
||||||
if (!alloc)
|
|
||||||
return -ENOMEM;
|
|
||||||
|
|
||||||
alloc->next = NULL;
|
|
||||||
memcpy(alloc->fsid, fsid, BTRFS_FSID_SIZE);
|
|
||||||
alloc->fd = fd;
|
|
||||||
alloc->dirstream = dirstream;
|
|
||||||
|
|
||||||
if (seen)
|
|
||||||
seen->next = alloc;
|
|
||||||
else
|
|
||||||
seen_fsid_hash[slot] = alloc;
|
|
||||||
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
void free_seen_fsid(struct seen_fsid *seen_fsid_hash[])
|
|
||||||
{
|
|
||||||
int slot;
|
|
||||||
struct seen_fsid *seen;
|
|
||||||
struct seen_fsid *next;
|
|
||||||
|
|
||||||
for (slot = 0; slot < SEEN_FSID_HASH_SIZE; slot++) {
|
|
||||||
seen = seen_fsid_hash[slot];
|
|
||||||
while (seen) {
|
|
||||||
next = seen->next;
|
|
||||||
close_file_or_dir(seen->fd, seen->dirstream);
|
|
||||||
free(seen);
|
|
||||||
seen = next;
|
|
||||||
}
|
|
||||||
seen_fsid_hash[slot] = NULL;
|
|
||||||
}
|
|
||||||
}
|
|
||||||
|
|
||||||
static int group_profile_devs_min(u64 flag)
|
static int group_profile_devs_min(u64 flag)
|
||||||
{
|
{
|
||||||
switch (flag & BTRFS_BLOCK_GROUP_PROFILE_MASK) {
|
switch (flag & BTRFS_BLOCK_GROUP_PROFILE_MASK) {
|
||||||
|
@ -1511,61 +1197,6 @@ int group_profile_max_safe_loss(u64 flags)
|
||||||
}
|
}
|
||||||
}
|
}
|
||||||
|
|
||||||
int btrfs_scan_devices(void)
|
|
||||||
{
|
|
||||||
int fd = -1;
|
|
||||||
int ret;
|
|
||||||
u64 num_devices;
|
|
||||||
struct btrfs_fs_devices *tmp_devices;
|
|
||||||
blkid_dev_iterate iter = NULL;
|
|
||||||
blkid_dev dev = NULL;
|
|
||||||
blkid_cache cache = NULL;
|
|
||||||
char path[PATH_MAX];
|
|
||||||
|
|
||||||
if (btrfs_scan_done)
|
|
||||||
return 0;
|
|
||||||
|
|
||||||
ret = blkid_get_cache(&cache, NULL);
|
|
||||||
if (ret < 0) {
|
|
||||||
errno = -ret;
|
|
||||||
error("blkid cache get failed: %m");
|
|
||||||
return ret;
|
|
||||||
}
|
|
||||||
blkid_probe_all(cache);
|
|
||||||
iter = blkid_dev_iterate_begin(cache);
|
|
||||||
blkid_dev_set_search(iter, "TYPE", "btrfs");
|
|
||||||
while (blkid_dev_next(iter, &dev) == 0) {
|
|
||||||
dev = blkid_verify(cache, dev);
|
|
||||||
if (!dev)
|
|
||||||
continue;
|
|
||||||
/* if we are here its definitely a btrfs disk*/
|
|
||||||
strncpy_null(path, blkid_dev_devname(dev));
|
|
||||||
|
|
||||||
fd = open(path, O_RDONLY);
|
|
||||||
if (fd < 0) {
|
|
||||||
error("cannot open %s: %m", path);
|
|
||||||
continue;
|
|
||||||
}
|
|
||||||
ret = btrfs_scan_one_device(fd, path, &tmp_devices,
|
|
||||||
&num_devices, BTRFS_SUPER_INFO_OFFSET,
|
|
||||||
SBREAD_DEFAULT);
|
|
||||||
if (ret) {
|
|
||||||
errno = -ret;
|
|
||||||
error("cannot scan %s: %m", path);
|
|
||||||
close (fd);
|
|
||||||
continue;
|
|
||||||
}
|
|
||||||
|
|
||||||
close(fd);
|
|
||||||
}
|
|
||||||
blkid_dev_iterate_end(iter);
|
|
||||||
blkid_put_cache(cache);
|
|
||||||
|
|
||||||
btrfs_scan_done = 1;
|
|
||||||
|
|
||||||
return 0;
|
|
||||||
}
|
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* This reads a line from the stdin and only returns non-zero if the
|
* This reads a line from the stdin and only returns non-zero if the
|
||||||
* first whitespace delimited token is a case insensitive match with yes
|
* first whitespace delimited token is a case insensitive match with yes
|
||||||
|
|
|
@ -31,17 +31,6 @@
|
||||||
#include "ioctl.h"
|
#include "ioctl.h"
|
||||||
#include "common/fsfeatures.h"
|
#include "common/fsfeatures.h"
|
||||||
|
|
||||||
#define BTRFS_SCAN_MOUNTED (1ULL << 0)
|
|
||||||
#define BTRFS_SCAN_LBLKID (1ULL << 1)
|
|
||||||
|
|
||||||
#define BTRFS_UPDATE_KERNEL 1
|
|
||||||
|
|
||||||
#define BTRFS_ARG_UNKNOWN 0
|
|
||||||
#define BTRFS_ARG_MNTPOINT 1
|
|
||||||
#define BTRFS_ARG_UUID 2
|
|
||||||
#define BTRFS_ARG_BLKDEV 3
|
|
||||||
#define BTRFS_ARG_REG 4
|
|
||||||
|
|
||||||
/*
|
/*
|
||||||
* Output modes of size
|
* Output modes of size
|
||||||
*/
|
*/
|
||||||
|
@ -66,28 +55,11 @@
|
||||||
void units_set_mode(unsigned *units, unsigned mode);
|
void units_set_mode(unsigned *units, unsigned mode);
|
||||||
void units_set_base(unsigned *units, unsigned base);
|
void units_set_base(unsigned *units, unsigned base);
|
||||||
|
|
||||||
#define SEEN_FSID_HASH_SIZE 256
|
|
||||||
struct seen_fsid {
|
|
||||||
u8 fsid[BTRFS_FSID_SIZE];
|
|
||||||
struct seen_fsid *next;
|
|
||||||
DIR *dirstream;
|
|
||||||
int fd;
|
|
||||||
};
|
|
||||||
|
|
||||||
int btrfs_make_root_dir(struct btrfs_trans_handle *trans,
|
int btrfs_make_root_dir(struct btrfs_trans_handle *trans,
|
||||||
struct btrfs_root *root, u64 objectid);
|
struct btrfs_root *root, u64 objectid);
|
||||||
int btrfs_add_to_fsid(struct btrfs_trans_handle *trans,
|
|
||||||
struct btrfs_root *root, int fd, const char *path,
|
|
||||||
u64 block_count, u32 io_width, u32 io_align,
|
|
||||||
u32 sectorsize);
|
|
||||||
int btrfs_scan_for_fsid(int run_ioctls);
|
|
||||||
int btrfs_register_one_device(const char *fname);
|
|
||||||
int btrfs_register_all_devices(void);
|
|
||||||
int check_mounted(const char *devicename);
|
int check_mounted(const char *devicename);
|
||||||
int check_mounted_where(int fd, const char *file, char *where, int size,
|
int check_mounted_where(int fd, const char *file, char *where, int size,
|
||||||
struct btrfs_fs_devices **fs_devices_mnt, unsigned sbflags);
|
struct btrfs_fs_devices **fs_devices_mnt, unsigned sbflags);
|
||||||
int btrfs_device_already_in_root(struct btrfs_root *root, int fd,
|
|
||||||
int super_offset);
|
|
||||||
|
|
||||||
int pretty_size_snprintf(u64 size, char *str, size_t str_bytes, unsigned unit_mode);
|
int pretty_size_snprintf(u64 size, char *str, size_t str_bytes, unsigned unit_mode);
|
||||||
#define pretty_size(size) pretty_size_mode(size, UNITS_DEFAULT)
|
#define pretty_size(size) pretty_size_mode(size, UNITS_DEFAULT)
|
||||||
|
@ -103,11 +75,6 @@ int get_fs_info(const char *path, struct btrfs_ioctl_fs_info_args *fi_args,
|
||||||
struct btrfs_ioctl_dev_info_args **di_ret);
|
struct btrfs_ioctl_dev_info_args **di_ret);
|
||||||
int get_fsid(const char *path, u8 *fsid, int silent);
|
int get_fsid(const char *path, u8 *fsid, int silent);
|
||||||
|
|
||||||
int is_seen_fsid(u8 *fsid, struct seen_fsid *seen_fsid_hash[]);
|
|
||||||
int add_seen_fsid(u8 *fsid, struct seen_fsid *seen_fsid_hash[],
|
|
||||||
int fd, DIR *dirstream);
|
|
||||||
void free_seen_fsid(struct seen_fsid *seen_fsid_hash[]);
|
|
||||||
|
|
||||||
int get_label(const char *btrfs_dev, char *label);
|
int get_label(const char *btrfs_dev, char *label);
|
||||||
int set_label(const char *btrfs_dev, const char *label);
|
int set_label(const char *btrfs_dev, const char *label);
|
||||||
|
|
||||||
|
@ -123,7 +90,6 @@ int csum_tree_block(struct btrfs_fs_info *root, struct extent_buffer *buf,
|
||||||
int verify);
|
int verify);
|
||||||
int ask_user(const char *question);
|
int ask_user(const char *question);
|
||||||
int lookup_path_rootid(int fd, u64 *rootid);
|
int lookup_path_rootid(int fd, u64 *rootid);
|
||||||
int btrfs_scan_devices(void);
|
|
||||||
int get_btrfs_mount(const char *dev, char *mp, size_t mp_size);
|
int get_btrfs_mount(const char *dev, char *mp, size_t mp_size);
|
||||||
int find_mount_root(const char *path, char **mount_root);
|
int find_mount_root(const char *path, char **mount_root);
|
||||||
int get_device_info(int fd, u64 devid,
|
int get_device_info(int fd, u64 devid,
|
||||||
|
|
|
@ -33,6 +33,7 @@
|
||||||
#include "common/utils.h"
|
#include "common/utils.h"
|
||||||
#include "print-tree.h"
|
#include "print-tree.h"
|
||||||
#include "common/rbtree-utils.h"
|
#include "common/rbtree-utils.h"
|
||||||
|
#include "common/device-scan.h"
|
||||||
|
|
||||||
/* specified errno for check_tree_block */
|
/* specified errno for check_tree_block */
|
||||||
#define BTRFS_BAD_BYTENR (-1)
|
#define BTRFS_BAD_BYTENR (-1)
|
||||||
|
|
|
@ -39,6 +39,7 @@
|
||||||
#include "common/utils.h"
|
#include "common/utils.h"
|
||||||
#include "common/path-utils.h"
|
#include "common/path-utils.h"
|
||||||
#include "common/device-utils.h"
|
#include "common/device-utils.h"
|
||||||
|
#include "common/device-scan.h"
|
||||||
#include "kernel-lib/list_sort.h"
|
#include "kernel-lib/list_sort.h"
|
||||||
#include "common/help.h"
|
#include "common/help.h"
|
||||||
#include "common/rbtree-utils.h"
|
#include "common/rbtree-utils.h"
|
||||||
|
|
Loading…
Reference in New Issue