[T106][ZXW-22]7520V3SCV2.01.01.02P42U09_VEC_V0.8_AP_VEC origin source commit
Change-Id: Ic6e05d89ecd62fc34f82b23dcf306c93764aec4b
diff --git a/ap/os/linux/linux-3.4.x/fs/gfs2/glock.h b/ap/os/linux/linux-3.4.x/fs/gfs2/glock.h
new file mode 100644
index 0000000..307ac31
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/fs/gfs2/glock.h
@@ -0,0 +1,253 @@
+/*
+ * Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
+ * Copyright (C) 2004-2006 Red Hat, Inc. All rights reserved.
+ *
+ * This copyrighted material is made available to anyone wishing to use,
+ * modify, copy, or redistribute it subject to the terms and conditions
+ * of the GNU General Public License version 2.
+ */
+
+#ifndef __GLOCK_DOT_H__
+#define __GLOCK_DOT_H__
+
+#include <linux/sched.h>
+#include <linux/parser.h>
+#include "incore.h"
+
+/* Options for hostdata parser */
+
+enum {
+ Opt_jid,
+ Opt_id,
+ Opt_first,
+ Opt_nodir,
+ Opt_err,
+};
+
+/*
+ * lm_lockname types
+ */
+
+#define LM_TYPE_RESERVED 0x00
+#define LM_TYPE_NONDISK 0x01
+#define LM_TYPE_INODE 0x02
+#define LM_TYPE_RGRP 0x03
+#define LM_TYPE_META 0x04
+#define LM_TYPE_IOPEN 0x05
+#define LM_TYPE_FLOCK 0x06
+#define LM_TYPE_PLOCK 0x07
+#define LM_TYPE_QUOTA 0x08
+#define LM_TYPE_JOURNAL 0x09
+
+/*
+ * 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 0
+#define LM_ST_EXCLUSIVE 1
+#define LM_ST_DEFERRED 2
+#define LM_ST_SHARED 3
+
+/*
+ * 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_PRIORITY
+ * Override fairness considerations. Suppose a lock is held in a shared state
+ * and there is a pending request for the deferred state. A shared lock
+ * request with the priority flag would be allowed to bypass the deferred
+ * request and directly join the other shared lock. A shared lock request
+ * without the priority flag might be forced to wait until the deferred
+ * requested had acquired and released the lock.
+ */
+
+#define LM_FLAG_TRY 0x00000001
+#define LM_FLAG_TRY_1CB 0x00000002
+#define LM_FLAG_NOEXP 0x00000004
+#define LM_FLAG_ANY 0x00000008
+#define LM_FLAG_PRIORITY 0x00000010
+#define GL_ASYNC 0x00000040
+#define GL_EXACT 0x00000080
+#define GL_SKIP 0x00000100
+#define GL_NOCACHE 0x00000400
+
+/*
+ * 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 0x00000003
+#define LM_OUT_CANCELED 0x00000008
+#define LM_OUT_ERROR 0x00000004
+
+/*
+ * lm_recovery_done() messages
+ */
+
+#define LM_RD_GAVEUP 308
+#define LM_RD_SUCCESS 309
+
+#define GLR_TRYFAILED 13
+
+#define GL_GLOCK_MAX_HOLD (long)(HZ / 5)
+#define GL_GLOCK_DFT_HOLD (long)(HZ / 5)
+#define GL_GLOCK_MIN_HOLD (long)(10)
+#define GL_GLOCK_HOLD_INCR (long)(HZ / 20)
+#define GL_GLOCK_HOLD_DECR (long)(HZ / 40)
+
+struct lm_lockops {
+ const char *lm_proto_name;
+ int (*lm_mount) (struct gfs2_sbd *sdp, const char *table);
+ void (*lm_first_done) (struct gfs2_sbd *sdp);
+ void (*lm_recovery_result) (struct gfs2_sbd *sdp, unsigned int jid,
+ unsigned int result);
+ void (*lm_unmount) (struct gfs2_sbd *sdp);
+ void (*lm_withdraw) (struct gfs2_sbd *sdp);
+ void (*lm_put_lock) (struct gfs2_glock *gl);
+ int (*lm_lock) (struct gfs2_glock *gl, unsigned int req_state,
+ unsigned int flags);
+ void (*lm_cancel) (struct gfs2_glock *gl);
+ const match_table_t *lm_tokens;
+};
+
+extern struct workqueue_struct *gfs2_delete_workqueue;
+static inline struct gfs2_holder *gfs2_glock_is_locked_by_me(struct gfs2_glock *gl)
+{
+ struct gfs2_holder *gh;
+ struct pid *pid;
+
+ /* Look in glock's list of holders for one with current task as owner */
+ spin_lock(&gl->gl_spin);
+ pid = task_pid(current);
+ list_for_each_entry(gh, &gl->gl_holders, gh_list) {
+ if (!test_bit(HIF_HOLDER, &gh->gh_iflags))
+ break;
+ if (gh->gh_owner_pid == pid)
+ goto out;
+ }
+ gh = NULL;
+out:
+ spin_unlock(&gl->gl_spin);
+
+ return gh;
+}
+
+static inline int gfs2_glock_is_held_excl(struct gfs2_glock *gl)
+{
+ return gl->gl_state == LM_ST_EXCLUSIVE;
+}
+
+static inline int gfs2_glock_is_held_dfrd(struct gfs2_glock *gl)
+{
+ return gl->gl_state == LM_ST_DEFERRED;
+}
+
+static inline int gfs2_glock_is_held_shrd(struct gfs2_glock *gl)
+{
+ return gl->gl_state == LM_ST_SHARED;
+}
+
+static inline struct address_space *gfs2_glock2aspace(struct gfs2_glock *gl)
+{
+ if (gl->gl_ops->go_flags & GLOF_ASPACE)
+ return (struct address_space *)(gl + 1);
+ return NULL;
+}
+
+int gfs2_glock_get(struct gfs2_sbd *sdp,
+ u64 number, const struct gfs2_glock_operations *glops,
+ int create, struct gfs2_glock **glp);
+void gfs2_glock_hold(struct gfs2_glock *gl);
+void gfs2_glock_put_nolock(struct gfs2_glock *gl);
+void gfs2_glock_put(struct gfs2_glock *gl);
+void gfs2_holder_init(struct gfs2_glock *gl, unsigned int state, unsigned flags,
+ struct gfs2_holder *gh);
+void gfs2_holder_reinit(unsigned int state, unsigned 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_glock_wait(struct gfs2_holder *gh);
+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, int 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_glock_dq_uninit_m(unsigned int num_gh, struct gfs2_holder *ghs);
+
+__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, int flags,
+ struct gfs2_holder *gh)
+{
+ int error;
+
+ gfs2_holder_init(gl, state, flags, gh);
+
+ error = gfs2_glock_nq(gh);
+ if (error)
+ gfs2_holder_uninit(gh);
+
+ return error;
+}
+
+extern void gfs2_glock_cb(struct gfs2_glock *gl, unsigned int state);
+extern void gfs2_glock_complete(struct gfs2_glock *gl, int ret);
+extern void gfs2_gl_hash_clear(struct gfs2_sbd *sdp);
+extern void gfs2_glock_finish_truncate(struct gfs2_inode *ip);
+extern void gfs2_glock_thaw(struct gfs2_sbd *sdp);
+extern void gfs2_glock_add_to_lru(struct gfs2_glock *gl);
+extern void gfs2_glock_free(struct gfs2_glock *gl);
+
+extern int __init gfs2_glock_init(void);
+extern void gfs2_glock_exit(void);
+
+extern int gfs2_create_debugfs_file(struct gfs2_sbd *sdp);
+extern void gfs2_delete_debugfs_file(struct gfs2_sbd *sdp);
+extern int gfs2_register_debugfs(void);
+extern void gfs2_unregister_debugfs(void);
+
+extern const struct lm_lockops gfs2_dlm_ops;
+
+#endif /* __GLOCK_DOT_H__ */