5333445574
the dev scan to find btrfs is performed at two locations all most the same way one at filesystem show and another at device scan. They both follow the same steps. This patch does not alter anything except that it brings these two same logic into the function scan_for_btrfs so that we can play tweaking it. the patch which recommends to use /dev/mapper will also need it Signed-off-by: Anand Jain <anand.jain@oracle.com> Signed-off-by: David Sterba <dsterba@suse.cz> Signed-off-by: Chris Mason <chris.mason@fusionio.com>
82 lines
3.2 KiB
C
82 lines
3.2 KiB
C
/*
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* Copyright (C) 2007 Oracle. All rights reserved.
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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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#ifndef __UTILS__
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#define __UTILS__
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#include <sys/stat.h>
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#include "ctree.h"
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#include <dirent.h>
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#define BTRFS_MKFS_SYSTEM_GROUP_SIZE (4 * 1024 * 1024)
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#define BTRFS_SCAN_PROC 1
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#define BTRFS_SCAN_DEV 2
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int make_btrfs(int fd, const char *device, const char *label,
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u64 blocks[6], u64 num_bytes, u32 nodesize,
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u32 leafsize, u32 sectorsize, u32 stripesize);
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int btrfs_make_root_dir(struct btrfs_trans_handle *trans,
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struct btrfs_root *root, u64 objectid);
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int btrfs_prepare_device(int fd, char *file, int zero_end, u64 *block_count_ret,
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u64 max_block_count, int *mixed, int nodiscard);
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int btrfs_add_to_fsid(struct btrfs_trans_handle *trans,
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struct btrfs_root *root, int fd, char *path,
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u64 block_count, u32 io_width, u32 io_align,
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u32 sectorsize);
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int btrfs_scan_for_fsid(int run_ioctls);
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void btrfs_register_one_device(char *fname);
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int btrfs_scan_one_dir(char *dirname, int run_ioctl);
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int check_mounted(const char *devicename);
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int check_mounted_where(int fd, const char *file, char *where, int size,
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struct btrfs_fs_devices **fs_devices_mnt);
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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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void pretty_size_snprintf(u64 size, char *str, size_t str_bytes);
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#define pretty_size(size) \
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({ \
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static __thread char _str[24]; \
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pretty_size_snprintf((size), _str, sizeof(_str)); \
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_str; \
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})
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int get_mountpt(char *dev, char *mntpt, size_t size);
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int btrfs_scan_block_devices(int run_ioctl);
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u64 parse_size(char *s);
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int open_file_or_dir(const char *fname, DIR **dirstream);
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void close_file_or_dir(int fd, DIR *dirstream);
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int get_device_info(int fd, u64 devid,
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struct btrfs_ioctl_dev_info_args *di_args);
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int get_fs_info(char *path, struct btrfs_ioctl_fs_info_args *fi_args,
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struct btrfs_ioctl_dev_info_args **di_ret);
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int get_label(const char *btrfs_dev);
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int set_label(const char *btrfs_dev, const char *label);
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char *__strncpy__null(char *dest, const char *src, size_t n);
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int is_block_device(const char *file);
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int get_btrfs_mount(const char *path, char *mp, size_t mp_size);
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int open_path_or_dev_mnt(const char *path, DIR **dirstream);
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int is_swap_device(const char *file);
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u64 btrfs_device_size(int fd, struct stat *st);
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/* Helper to always get proper size of the destination string */
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#define strncpy_null(dest, src) __strncpy__null(dest, src, sizeof(dest))
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int test_dev_for_mkfs(char *file, int force_overwrite, char *estr);
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int scan_for_btrfs(int where, int update_kernel);
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#endif
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