/* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved. */ #ifndef __GLOCK_DOT_H__ #define __GLOCK_DOT_H__ #include <linux/sched.h> #include <linux/parser.h> #include "incore.h" #include "util.h" /* Options for hostdata parser */ enum { … }; /* * lm_lockname types */ #define LM_TYPE_RESERVED … #define LM_TYPE_NONDISK … #define LM_TYPE_INODE … #define LM_TYPE_RGRP … #define LM_TYPE_META … #define LM_TYPE_IOPEN … #define LM_TYPE_FLOCK … #define LM_TYPE_PLOCK … #define LM_TYPE_QUOTA … #define LM_TYPE_JOURNAL … /* * lm_lock() states * * SHARED is compatible with SHARED, not with DEFERRED or EX. * DEFERRED is compatible with DEFERRED, not with SHARED or EX. */ #define LM_ST_UNLOCKED … #define LM_ST_EXCLUSIVE … #define LM_ST_DEFERRED … #define LM_ST_SHARED … /* * lm_lock() flags * * LM_FLAG_TRY * Don't wait to acquire the lock if it can't be granted immediately. * * LM_FLAG_TRY_1CB * Send one blocking callback if TRY is set and the lock is not granted. * * LM_FLAG_NOEXP * GFS sets this flag on lock requests it makes while doing journal recovery. * These special requests should not be blocked due to the recovery like * ordinary locks would be. * * LM_FLAG_ANY * A SHARED request may also be granted in DEFERRED, or a DEFERRED request may * also be granted in SHARED. The preferred state is whichever is compatible * with other granted locks, or the specified state if no other locks exist. * * LM_FLAG_NODE_SCOPE * This holder agrees to share the lock within this node. In other words, * the glock is held in EX mode according to DLM, but local holders on the * same node can share it. */ #define LM_FLAG_TRY … #define LM_FLAG_TRY_1CB … #define LM_FLAG_NOEXP … #define LM_FLAG_ANY … #define LM_FLAG_NODE_SCOPE … #define GL_ASYNC … #define GL_EXACT … #define GL_SKIP … #define GL_NOPID … #define GL_NOCACHE … #define GL_NOBLOCK … /* * lm_async_cb return flags * * LM_OUT_ST_MASK * Masks the lower two bits of lock state in the returned value. * * LM_OUT_CANCELED * The lock request was canceled. * */ #define LM_OUT_ST_MASK … #define LM_OUT_CANCELED … #define LM_OUT_ERROR … /* * lm_recovery_done() messages */ #define LM_RD_GAVEUP … #define LM_RD_SUCCESS … #define GLR_TRYFAILED … #define GL_GLOCK_MAX_HOLD … #define GL_GLOCK_DFT_HOLD … #define GL_GLOCK_MIN_HOLD … #define GL_GLOCK_HOLD_INCR … #define GL_GLOCK_HOLD_DECR … struct lm_lockops { … }; struct gfs2_glock_aspace { … }; static inline struct gfs2_holder *gfs2_glock_is_locked_by_me(struct gfs2_glock *gl) { … } static inline struct address_space *gfs2_glock2aspace(struct gfs2_glock *gl) { … } int gfs2_glock_get(struct gfs2_sbd *sdp, u64 number, const struct gfs2_glock_operations *glops, int create, struct gfs2_glock **glp); struct gfs2_glock *gfs2_glock_hold(struct gfs2_glock *gl); void gfs2_glock_put(struct gfs2_glock *gl); void gfs2_glock_put_async(struct gfs2_glock *gl); void __gfs2_holder_init(struct gfs2_glock *gl, unsigned int state, u16 flags, struct gfs2_holder *gh, unsigned long ip); static inline void gfs2_holder_init(struct gfs2_glock *gl, unsigned int state, u16 flags, struct gfs2_holder *gh) { … } void gfs2_holder_reinit(unsigned int state, u16 flags, struct gfs2_holder *gh); void gfs2_holder_uninit(struct gfs2_holder *gh); int gfs2_glock_nq(struct gfs2_holder *gh); int gfs2_glock_poll(struct gfs2_holder *gh); int gfs2_instantiate(struct gfs2_holder *gh); int gfs2_glock_holder_ready(struct gfs2_holder *gh); int gfs2_glock_wait(struct gfs2_holder *gh); int gfs2_glock_async_wait(unsigned int num_gh, struct gfs2_holder *ghs); void gfs2_glock_dq(struct gfs2_holder *gh); void gfs2_glock_dq_wait(struct gfs2_holder *gh); void gfs2_glock_dq_uninit(struct gfs2_holder *gh); int gfs2_glock_nq_num(struct gfs2_sbd *sdp, u64 number, const struct gfs2_glock_operations *glops, unsigned int state, u16 flags, struct gfs2_holder *gh); int gfs2_glock_nq_m(unsigned int num_gh, struct gfs2_holder *ghs); void gfs2_glock_dq_m(unsigned int num_gh, struct gfs2_holder *ghs); void gfs2_dump_glock(struct seq_file *seq, struct gfs2_glock *gl, bool fsid); #define GLOCK_BUG_ON(gl,x) … #define gfs2_glock_assert_warn(gl, x) … #define gfs2_glock_assert_withdraw(gl, x) … __printf(2, 3) void gfs2_print_dbg(struct seq_file *seq, const char *fmt, ...); /** * gfs2_glock_nq_init - initialize a holder and enqueue it on a glock * @gl: the glock * @state: the state we're requesting * @flags: the modifier flags * @gh: the holder structure * * Returns: 0, GLR_*, or errno */ static inline int gfs2_glock_nq_init(struct gfs2_glock *gl, unsigned int state, u16 flags, struct gfs2_holder *gh) { … } void gfs2_glock_cb(struct gfs2_glock *gl, unsigned int state); void gfs2_glock_complete(struct gfs2_glock *gl, int ret); bool gfs2_queue_try_to_evict(struct gfs2_glock *gl); void gfs2_cancel_delete_work(struct gfs2_glock *gl); void gfs2_flush_delete_work(struct gfs2_sbd *sdp); void gfs2_gl_hash_clear(struct gfs2_sbd *sdp); void gfs2_gl_dq_holders(struct gfs2_sbd *sdp); void gfs2_glock_thaw(struct gfs2_sbd *sdp); void gfs2_glock_free(struct gfs2_glock *gl); void gfs2_glock_free_later(struct gfs2_glock *gl); int __init gfs2_glock_init(void); void gfs2_glock_exit(void); void gfs2_create_debugfs_file(struct gfs2_sbd *sdp); void gfs2_delete_debugfs_file(struct gfs2_sbd *sdp); void gfs2_register_debugfs(void); void gfs2_unregister_debugfs(void); void glock_set_object(struct gfs2_glock *gl, void *object); void glock_clear_object(struct gfs2_glock *gl, void *object); extern const struct lm_lockops gfs2_dlm_ops; static inline void gfs2_holder_mark_uninitialized(struct gfs2_holder *gh) { … } static inline bool gfs2_holder_initialized(struct gfs2_holder *gh) { … } static inline bool gfs2_holder_queued(struct gfs2_holder *gh) { … } void gfs2_inode_remember_delete(struct gfs2_glock *gl, u64 generation); bool gfs2_inode_already_deleted(struct gfs2_glock *gl, u64 generation); #endif /* __GLOCK_DOT_H__ */
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