fs/btrfs/fs.h

1 /* SPDX-License-Identifier: GPL-2.0 */
21 #include <linux/radix-tree.h>
29 #include "extent-io-tree.h"
30 #include "async-thread.h"
31 #include "block-rsv.h"
81  * Runtime (in-memory) states of filesystem
98 	/* The btrfs_fs_info created for self-tests */
293 	/* Seconds since 1-Jan-1970 */
295 	/* Seconds since 1-Jan-1970 */
399 	/* The maximum commit duration so far in ns */
401 	/* The last commit duration in ns */
403 	/* The total commit duration in ns */
440 	/* logical->physical extent mapping */
492 	 * extent. The write side(mount/remount) is under ->s_umount lock,
539 	 * function happens to be doing non-waiting preflush before jumping
575 	/* This is used to protect the following list -- ordered_roots. */
646 	 * The space_info list is effectively read only after initial setup.
761 	/* Entries are eb->start / sectorsize */
849 	 * Last generation where we dropped a non-relocation root.
880 					  struct page *: (_page))->mapping->host))
882 					  struct folio *: (_folio))->mapping->host))
884 #define page_to_fs_info(_page)	 (page_to_inode(_page)->root->fs_info)
885 #define folio_to_fs_info(_folio) (folio_to_inode(_folio)->root->fs_info)
888 					   struct inode *: (_inode)))->root->fs_info)
892 	return READ_ONCE(fs_info->generation);  in btrfs_get_fs_generation()
897 	WRITE_ONCE(fs_info->generation, gen);  in btrfs_set_fs_generation()
902 	return READ_ONCE(fs_info->last_trans_committed);  in btrfs_get_last_trans_committed()
907 	WRITE_ONCE(fs_info->last_trans_committed, gen);  in btrfs_set_last_trans_committed()
913 	WRITE_ONCE(fs_info->last_root_drop_gen, gen);  in btrfs_set_last_root_drop_gen()
918 	return READ_ONCE(fs_info->last_root_drop_gen);  in btrfs_get_last_root_drop_gen()
928 	const u64 num_csums = csum_bytes >> fs_info->sectorsize_bits;  in btrfs_csum_bytes_to_leaves()
930 	return DIV_ROUND_UP_ULL(num_csums, fs_info->csums_per_leaf);  in btrfs_csum_bytes_to_leaves()
940 	return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;  in btrfs_calc_insert_metadata_size()
950 	return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;  in btrfs_calc_metadata_size()
953 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
958 	return IS_ENABLED(CONFIG_BLK_DEV_ZONED) && fs_info->zone_size > 0;  in btrfs_is_zoned()
962  * Count how many fs_info->max_extent_size cover the @size
968 		return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE);  in count_max_extents()
971 	return div_u64(size + fs_info->max_extent_size - 1, fs_info->max_extent_size);  in count_max_extents()
996 	(!!(btrfs_super_incompat_flags((fs_info)->super_copy) & (flags)))
999 	(!!(btrfs_super_compat_ro_flags((fs_info)->super_copy) & (flags)))
1022 #define btrfs_test_opt(fs_info, opt)	((fs_info)->mount_opt & \
1028 	if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {  in btrfs_fs_closing()
1029 		if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))  in btrfs_fs_closing()
1046 	return test_bit(BTRFS_FS_STATE_RO, &fs_info->fs_state) ||  in btrfs_need_cleaner_sleep()
1052 	clear_and_wake_up_bit(BTRFS_FS_UNFINISHED_DROPS, &fs_info->flags);  in btrfs_wake_unfinished_drop()
1055 #define BTRFS_FS_ERROR(fs_info)	(READ_ONCE((fs_info)->fs_error))
1059 			   &(fs_info)->fs_state)))
1067 	return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);  in btrfs_is_testing()