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https://github.com/versity/scoutfs.git
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Zach Brown
1d0cd95b55
The commit work sets trans_holds so that all hold attempts block while it's doing its work. Now that it's calling in to generic vfs functions to write out dirty file data it can end up in generic write functions that try to hold the trans and can deadlock. This adds tracking of the commit task so that holds know to let it proceed without deadlocking. Signed-off-by: Zach Brown <zab@versity.com> Reviewed-by: Mark Fasheh <mfasheh@versity.com>
77 lines
1.7 KiB
C
77 lines
1.7 KiB
C
#ifndef _SCOUTFS_SUPER_H_
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#define _SCOUTFS_SUPER_H_
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#include <linux/fs.h>
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#include <linux/rbtree.h>
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#include "format.h"
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#include "buddy.h"
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struct scoutfs_counters;
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struct buddy_info;
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struct scoutfs_sb_info {
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struct super_block *sb;
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struct scoutfs_super_block super;
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struct scoutfs_super_block stable_super;
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spinlock_t next_ino_lock;
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spinlock_t block_lock;
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struct radix_tree_root block_radix;
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wait_queue_head_t block_wq;
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atomic_t block_writes;
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int block_write_err;
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/* block cache lru */
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struct shrinker block_shrinker;
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struct list_head block_lru_list;
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unsigned long block_lru_nr;
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struct buddy_info *buddy_info;
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struct rw_semaphore btree_rwsem;
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atomic_t trans_holds;
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wait_queue_head_t trans_hold_wq;
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struct task_struct *trans_task;
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spinlock_t trans_write_lock;
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u64 trans_write_count;
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int trans_write_ret;
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struct work_struct trans_write_work;
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wait_queue_head_t trans_write_wq;
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struct workqueue_struct *trans_write_workq;
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/* $sysfs/fs/scoutfs/$id/ */
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struct kset *kset;
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struct scoutfs_counters *counters;
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/* XXX we'd like this to be per task, not per super */
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spinlock_t file_alloc_lock;
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u64 file_alloc_blkno;
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u64 file_alloc_count;
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};
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static inline struct scoutfs_sb_info *SCOUTFS_SB(struct super_block *sb)
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{
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return sb->s_fs_info;
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}
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/* The root of the metadata btree */
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static inline struct scoutfs_btree_root *SCOUTFS_META(struct super_block *sb)
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{
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return &SCOUTFS_SB(sb)->super.btree_root;
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}
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static inline struct scoutfs_btree_root *SCOUTFS_STABLE_META(struct super_block *sb)
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{
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return &SCOUTFS_SB(sb)->stable_super.btree_root;
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}
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void scoutfs_advance_dirty_super(struct super_block *sb);
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int scoutfs_write_dirty_super(struct super_block *sb);
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#endif
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