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"
93  * Runtime (in-memory) states of filesystem
110 	/* The btrfs_fs_info created for self-tests */
309 	/* Seconds since 1-Jan-1970 */
311 	/* Seconds since 1-Jan-1970 */
417 	/* The maximum commit duration so far in ns */
419 	/* The last commit duration in ns */
421 	/* The total commit duration in ns */
458 	/* logical->physical extent mapping */
510 	 * extent. The write side(mount/remount) is under ->s_umount lock,
557 	 * function happens to be doing non-waiting preflush before jumping
593 	/* This is used to protect the following list -- ordered_roots. */
668 	 * The space_info list is effectively read only after initial setup.
782 	/* Entries are eb->start / sectorsize */
870 	 * Last generation where we dropped a non-relocation root.
901 					  struct folio *: (_folio))->mapping->host))
903 #define folio_to_fs_info(_folio) (folio_to_inode(_folio)->root->fs_info)
906 					   struct inode *: (_inode)))->root->fs_info)
915 	return READ_ONCE(fs_info->generation);  in btrfs_get_fs_generation()
920 	WRITE_ONCE(fs_info->generation, gen);  in btrfs_set_fs_generation()
925 	return READ_ONCE(fs_info->last_trans_committed);  in btrfs_get_last_trans_committed()
930 	WRITE_ONCE(fs_info->last_trans_committed, gen);  in btrfs_set_last_trans_committed()
936 	WRITE_ONCE(fs_info->last_root_drop_gen, gen);  in btrfs_set_last_root_drop_gen()
941 	return READ_ONCE(fs_info->last_root_drop_gen);  in btrfs_get_last_root_drop_gen()
951 	const u64 num_csums = csum_bytes >> fs_info->sectorsize_bits;  in btrfs_csum_bytes_to_leaves()
953 	return DIV_ROUND_UP_ULL(num_csums, fs_info->csums_per_leaf);  in btrfs_csum_bytes_to_leaves()
963 	return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * 2 * num_items;  in btrfs_calc_insert_metadata_size()
973 	return (u64)fs_info->nodesize * BTRFS_MAX_LEVEL * num_items;  in btrfs_calc_metadata_size()
976 #define BTRFS_MAX_EXTENT_ITEM_SIZE(r) ((BTRFS_LEAF_DATA_SIZE(r->fs_info) >> 4) - \
979 #define BTRFS_BYTES_TO_BLKS(fs_info, bytes) ((bytes) >> (fs_info)->sectorsize_bits)
983 	return IS_ENABLED(CONFIG_BLK_DEV_ZONED) && fs_info->zone_size > 0;  in btrfs_is_zoned()
987  * Count how many fs_info->max_extent_size cover the @size
993 		return div_u64(size + BTRFS_MAX_EXTENT_SIZE - 1, BTRFS_MAX_EXTENT_SIZE);  in count_max_extents()
996 	return div_u64(size + fs_info->max_extent_size - 1, fs_info->max_extent_size);  in count_max_extents()
1002 	return folio_size(folio) >> fs_info->sectorsize_bits;  in btrfs_blocks_per_folio()
1038 	(!!(btrfs_super_incompat_flags((fs_info)->super_copy) & (flags)))
1041 	(!!(btrfs_super_compat_ro_flags((fs_info)->super_copy) & (flags)))
1064 #define btrfs_test_opt(fs_info, opt)	((fs_info)->mount_opt & \
1070 	if (test_bit(BTRFS_FS_CLOSING_START, &fs_info->flags)) {  in btrfs_fs_closing()
1071 		if (test_bit(BTRFS_FS_CLOSING_DONE, &fs_info->flags))  in btrfs_fs_closing()
1088 	return test_bit(BTRFS_FS_STATE_RO, &fs_info->fs_state) ||  in btrfs_need_cleaner_sleep()
1094 	clear_and_wake_up_bit(BTRFS_FS_UNFINISHED_DROPS, &fs_info->flags);  in btrfs_wake_unfinished_drop()
1097 #define BTRFS_FS_ERROR(fs_info)	(READ_ONCE((fs_info)->fs_error))
1101 			   &(fs_info)->fs_state)))
1117 	return test_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);  in btrfs_is_testing()