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6406f05350
We're not using the roots member of this struct, so we can just use struct scoutfs_net_lock directly. Signed-off-by: Andy Grover <agrover@versity.com>
105 lines
3.6 KiB
C
105 lines
3.6 KiB
C
#ifndef _SCOUTFS_LOCK_H_
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#define _SCOUTFS_LOCK_H_
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#include "key.h"
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#include "tseq.h"
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#define SCOUTFS_LKF_REFRESH_INODE 0x01 /* update stale inode from item */
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#define SCOUTFS_LKF_NONBLOCK 0x02 /* only use already held locks */
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#define SCOUTFS_LKF_INVALID (~((SCOUTFS_LKF_NONBLOCK << 1) - 1))
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#define SCOUTFS_LOCK_NR_MODES SCOUTFS_LOCK_INVALID
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/*
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* A few fields (start, end, refresh_gen, write_version, granted_mode)
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* are referenced by code outside lock.c.
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*/
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struct scoutfs_lock {
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struct super_block *sb;
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struct scoutfs_key start;
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struct scoutfs_key end;
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struct rb_node node;
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struct rb_node range_node;
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u64 refresh_gen;
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u64 write_version;
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u64 dirty_trans_seq;
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struct list_head lru_head;
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wait_queue_head_t waitq;
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ktime_t grace_deadline;
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unsigned long request_pending:1,
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invalidate_pending:1;
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struct list_head grant_head;
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struct scoutfs_net_lock grant_nl;
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struct list_head inv_head;
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struct scoutfs_net_lock inv_nl;
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u64 inv_net_id;
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struct list_head shrink_head;
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spinlock_t cov_list_lock;
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struct list_head cov_list;
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enum scoutfs_lock_mode mode;
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unsigned int waiters[SCOUTFS_LOCK_NR_MODES];
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unsigned int users[SCOUTFS_LOCK_NR_MODES];
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struct scoutfs_tseq_entry tseq_entry;
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/* the forest tracks which log tree last saw bloom bit updates */
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atomic64_t forest_bloom_nr;
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};
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struct scoutfs_lock_coverage {
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spinlock_t cov_lock;
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struct scoutfs_lock *lock;
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struct list_head head;
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};
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int scoutfs_lock_grant_response(struct super_block *sb,
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struct scoutfs_net_lock *nl);
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int scoutfs_lock_invalidate_request(struct super_block *sb, u64 net_id,
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struct scoutfs_net_lock *nl);
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int scoutfs_lock_recover_request(struct super_block *sb, u64 net_id,
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struct scoutfs_key *key);
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int scoutfs_lock_inode(struct super_block *sb, enum scoutfs_lock_mode mode, int flags,
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struct inode *inode, struct scoutfs_lock **ret_lock);
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int scoutfs_lock_ino(struct super_block *sb, enum scoutfs_lock_mode mode, int flags, u64 ino,
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struct scoutfs_lock **ret_lock);
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void scoutfs_lock_get_index_item_range(u8 type, u64 major, u64 ino,
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struct scoutfs_key *start,
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struct scoutfs_key *end);
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int scoutfs_lock_inode_index(struct super_block *sb, enum scoutfs_lock_mode mode,
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u8 type, u64 major, u64 ino,
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struct scoutfs_lock **ret_lock);
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int scoutfs_lock_inodes(struct super_block *sb, enum scoutfs_lock_mode mode, int flags,
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struct inode *a, struct scoutfs_lock **a_lock,
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struct inode *b, struct scoutfs_lock **b_lock,
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struct inode *c, struct scoutfs_lock **c_lock,
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struct inode *d, struct scoutfs_lock **D_lock);
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int scoutfs_lock_rename(struct super_block *sb, enum scoutfs_lock_mode mode, int flags,
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struct scoutfs_lock **lock);
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int scoutfs_lock_rid(struct super_block *sb, enum scoutfs_lock_mode mode, int flags,
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u64 rid, struct scoutfs_lock **lock);
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void scoutfs_unlock(struct super_block *sb, struct scoutfs_lock *lock,
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enum scoutfs_lock_mode mode);
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void scoutfs_lock_init_coverage(struct scoutfs_lock_coverage *cov);
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void scoutfs_lock_add_coverage(struct super_block *sb,
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struct scoutfs_lock *lock,
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struct scoutfs_lock_coverage *cov);
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bool scoutfs_lock_is_covered(struct super_block *sb,
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struct scoutfs_lock_coverage *cov);
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void scoutfs_lock_del_coverage(struct super_block *sb,
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struct scoutfs_lock_coverage *cov);
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bool scoutfs_lock_protected(struct scoutfs_lock *lock, struct scoutfs_key *key,
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enum scoutfs_lock_mode mode);
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void scoutfs_free_unused_locks(struct super_block *sb, unsigned long nr);
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int scoutfs_lock_setup(struct super_block *sb);
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void scoutfs_lock_shutdown(struct super_block *sb);
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void scoutfs_lock_destroy(struct super_block *sb);
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#endif
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