From 3b9d4ed26680771295d904a6b83e88e620780893 Mon Sep 17 00:00:00 2001 From: Theodore Ts'o Date: Sat, 25 Apr 2009 22:54:04 -0400 Subject: ext4: Replace lock/unlock_super() with an explicit lock for the orphan list Use a separate lock to protect the orphan list, so we can stop overloading the use of lock_super(). Signed-off-by: "Theodore Ts'o" --- fs/ext4/ext4_sb.h | 1 + 1 file changed, 1 insertion(+) (limited to 'fs/ext4/ext4_sb.h') diff --git a/fs/ext4/ext4_sb.h b/fs/ext4/ext4_sb.h index 57b71fefbcc..4bda2f75d42 100644 --- a/fs/ext4/ext4_sb.h +++ b/fs/ext4/ext4_sb.h @@ -71,6 +71,7 @@ struct ext4_sb_info { struct inode *s_journal_inode; struct journal_s *s_journal; struct list_head s_orphan; + struct mutex s_orphan_lock; unsigned long s_commit_interval; u32 s_max_batch_time; u32 s_min_batch_time; -- cgit v1.2.3 From 32ed5058ce90024efcd811254b4b1de0468099df Mon Sep 17 00:00:00 2001 From: Theodore Ts'o Date: Sat, 25 Apr 2009 22:53:39 -0400 Subject: ext4: Replace lock/unlock_super() with an explicit lock for resizing Use a separate lock to protect s_groups_count and the other block group descriptors which get changed via an on-line resize operation, so we can stop overloading the use of lock_super(). Signed-off-by: "Theodore Ts'o" --- fs/ext4/ext4_sb.h | 1 + 1 file changed, 1 insertion(+) (limited to 'fs/ext4/ext4_sb.h') diff --git a/fs/ext4/ext4_sb.h b/fs/ext4/ext4_sb.h index 4bda2f75d42..2d36223d5f5 100644 --- a/fs/ext4/ext4_sb.h +++ b/fs/ext4/ext4_sb.h @@ -72,6 +72,7 @@ struct ext4_sb_info { struct journal_s *s_journal; struct list_head s_orphan; struct mutex s_orphan_lock; + struct mutex s_resize_lock; unsigned long s_commit_interval; u32 s_max_batch_time; u32 s_min_batch_time; -- cgit v1.2.3 From ca0faba0e8ac844dc0279825eb8db876b5962ea5 Mon Sep 17 00:00:00 2001 From: Theodore Ts'o Date: Sun, 3 May 2009 16:33:44 -0400 Subject: ext4: Move the ext4_sb.h header file into ext4.h There is no longer a reason for a separate ext4_sb.h header file, so move it into ext4.h just to make life easier for developers to find the relevant data structures and typedefs. Should also speed up compiles slightly, too. Signed-off-by: "Theodore Ts'o" --- fs/ext4/ext4_sb.h | 163 ------------------------------------------------------ 1 file changed, 163 deletions(-) delete mode 100644 fs/ext4/ext4_sb.h (limited to 'fs/ext4/ext4_sb.h') diff --git a/fs/ext4/ext4_sb.h b/fs/ext4/ext4_sb.h deleted file mode 100644 index 2d36223d5f5..00000000000 --- a/fs/ext4/ext4_sb.h +++ /dev/null @@ -1,163 +0,0 @@ -/* - * ext4_sb.h - * - * Copyright (C) 1992, 1993, 1994, 1995 - * Remy Card (card@masi.ibp.fr) - * Laboratoire MASI - Institut Blaise Pascal - * Universite Pierre et Marie Curie (Paris VI) - * - * from - * - * linux/include/linux/minix_fs_sb.h - * - * Copyright (C) 1991, 1992 Linus Torvalds - */ - -#ifndef _EXT4_SB -#define _EXT4_SB - -#ifdef __KERNEL__ -#include -#include -#include -#include -#endif -#include - -/* - * fourth extended-fs super-block data in memory - */ -struct ext4_sb_info { - unsigned long s_desc_size; /* Size of a group descriptor in bytes */ - unsigned long s_inodes_per_block;/* Number of inodes per block */ - unsigned long s_blocks_per_group;/* Number of blocks in a group */ - unsigned long s_inodes_per_group;/* Number of inodes in a group */ - unsigned long s_itb_per_group; /* Number of inode table blocks per group */ - unsigned long s_gdb_count; /* Number of group descriptor blocks */ - unsigned long s_desc_per_block; /* Number of group descriptors per block */ - ext4_group_t s_groups_count; /* Number of groups in the fs */ - unsigned long s_overhead_last; /* Last calculated overhead */ - unsigned long s_blocks_last; /* Last seen block count */ - loff_t s_bitmap_maxbytes; /* max bytes for bitmap files */ - struct buffer_head * s_sbh; /* Buffer containing the super block */ - struct ext4_super_block *s_es; /* Pointer to the super block in the buffer */ - struct buffer_head **s_group_desc; - unsigned long s_mount_opt; - ext4_fsblk_t s_sb_block; - uid_t s_resuid; - gid_t s_resgid; - unsigned short s_mount_state; - unsigned short s_pad; - int s_addr_per_block_bits; - int s_desc_per_block_bits; - int s_inode_size; - int s_first_ino; - unsigned int s_inode_readahead_blks; - spinlock_t s_next_gen_lock; - u32 s_next_generation; - u32 s_hash_seed[4]; - int s_def_hash_version; - int s_hash_unsigned; /* 3 if hash should be signed, 0 if not */ - struct percpu_counter s_freeblocks_counter; - struct percpu_counter s_freeinodes_counter; - struct percpu_counter s_dirs_counter; - struct percpu_counter s_dirtyblocks_counter; - struct blockgroup_lock *s_blockgroup_lock; - struct proc_dir_entry *s_proc; - struct kobject s_kobj; - struct completion s_kobj_unregister; - - /* Journaling */ - struct inode *s_journal_inode; - struct journal_s *s_journal; - struct list_head s_orphan; - struct mutex s_orphan_lock; - struct mutex s_resize_lock; - unsigned long s_commit_interval; - u32 s_max_batch_time; - u32 s_min_batch_time; - struct block_device *journal_bdev; -#ifdef CONFIG_JBD2_DEBUG - struct timer_list turn_ro_timer; /* For turning read-only (crash simulation) */ - wait_queue_head_t ro_wait_queue; /* For people waiting for the fs to go read-only */ -#endif -#ifdef CONFIG_QUOTA - char *s_qf_names[MAXQUOTAS]; /* Names of quota files with journalled quota */ - int s_jquota_fmt; /* Format of quota to use */ -#endif - unsigned int s_want_extra_isize; /* New inodes should reserve # bytes */ - -#ifdef EXTENTS_STATS - /* ext4 extents stats */ - unsigned long s_ext_min; - unsigned long s_ext_max; - unsigned long s_depth_max; - spinlock_t s_ext_stats_lock; - unsigned long s_ext_blocks; - unsigned long s_ext_extents; -#endif - - /* for buddy allocator */ - struct ext4_group_info ***s_group_info; - struct inode *s_buddy_cache; - long s_blocks_reserved; - spinlock_t s_reserve_lock; - spinlock_t s_md_lock; - tid_t s_last_transaction; - unsigned short *s_mb_offsets; - unsigned int *s_mb_maxs; - - /* tunables */ - unsigned long s_stripe; - unsigned int s_mb_stream_request; - unsigned int s_mb_max_to_scan; - unsigned int s_mb_min_to_scan; - unsigned int s_mb_stats; - unsigned int s_mb_order2_reqs; - unsigned int s_mb_group_prealloc; - /* where last allocation was done - for stream allocation */ - unsigned long s_mb_last_group; - unsigned long s_mb_last_start; - - /* history to debug policy */ - struct ext4_mb_history *s_mb_history; - int s_mb_history_cur; - int s_mb_history_max; - int s_mb_history_num; - spinlock_t s_mb_history_lock; - int s_mb_history_filter; - - /* stats for buddy allocator */ - spinlock_t s_mb_pa_lock; - atomic_t s_bal_reqs; /* number of reqs with len > 1 */ - atomic_t s_bal_success; /* we found long enough chunks */ - atomic_t s_bal_allocated; /* in blocks */ - atomic_t s_bal_ex_scanned; /* total extents scanned */ - atomic_t s_bal_goals; /* goal hits */ - atomic_t s_bal_breaks; /* too long searches */ - atomic_t s_bal_2orders; /* 2^order hits */ - spinlock_t s_bal_lock; - unsigned long s_mb_buddies_generated; - unsigned long long s_mb_generation_time; - atomic_t s_mb_lost_chunks; - atomic_t s_mb_preallocated; - atomic_t s_mb_discarded; - - /* locality groups */ - struct ext4_locality_group *s_locality_groups; - - /* for write statistics */ - unsigned long s_sectors_written_start; - u64 s_kbytes_written; - - unsigned int s_log_groups_per_flex; - struct flex_groups *s_flex_groups; -}; - -static inline spinlock_t * -sb_bgl_lock(struct ext4_sb_info *sbi, unsigned int block_group) -{ - return bgl_lock_ptr(sbi->s_blockgroup_lock, block_group); -} - -#endif /* _EXT4_SB */ -- cgit v1.2.3