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769 lines
21 KiB
769 lines
21 KiB
/* SPDX-License-Identifier: GPL-2.0-only */ |
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/****************************************************************************** |
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******************************************************************************* |
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** |
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** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved. |
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** Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved. |
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** |
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** |
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******************************************************************************* |
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******************************************************************************/ |
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#ifndef __DLM_INTERNAL_DOT_H__ |
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#define __DLM_INTERNAL_DOT_H__ |
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/* |
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* This is the main header file to be included in each DLM source file. |
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*/ |
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#include <linux/slab.h> |
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#include <linux/sched.h> |
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#include <linux/types.h> |
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#include <linux/ctype.h> |
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#include <linux/spinlock.h> |
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#include <linux/vmalloc.h> |
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#include <linux/list.h> |
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#include <linux/errno.h> |
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#include <linux/random.h> |
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#include <linux/delay.h> |
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#include <linux/socket.h> |
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#include <linux/kthread.h> |
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#include <linux/kobject.h> |
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#include <linux/kref.h> |
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#include <linux/kernel.h> |
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#include <linux/jhash.h> |
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#include <linux/miscdevice.h> |
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#include <linux/mutex.h> |
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#include <linux/idr.h> |
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#include <linux/ratelimit.h> |
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#include <linux/uaccess.h> |
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#include <linux/dlm.h> |
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#include "config.h" |
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/* Size of the temp buffer midcomms allocates on the stack. |
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We try to make this large enough so most messages fit. |
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FIXME: should sctp make this unnecessary? */ |
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#define DLM_INBUF_LEN 148 |
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struct dlm_ls; |
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struct dlm_lkb; |
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struct dlm_rsb; |
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struct dlm_member; |
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struct dlm_rsbtable; |
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struct dlm_recover; |
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struct dlm_header; |
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struct dlm_message; |
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struct dlm_rcom; |
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struct dlm_mhandle; |
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struct dlm_msg; |
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#define log_print(fmt, args...) \ |
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printk(KERN_ERR "dlm: "fmt"\n" , ##args) |
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#define log_print_ratelimited(fmt, args...) \ |
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printk_ratelimited(KERN_ERR "dlm: "fmt"\n", ##args) |
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#define log_error(ls, fmt, args...) \ |
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printk(KERN_ERR "dlm: %s: " fmt "\n", (ls)->ls_name , ##args) |
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#define log_rinfo(ls, fmt, args...) \ |
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do { \ |
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if (dlm_config.ci_log_info) \ |
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printk(KERN_INFO "dlm: %s: " fmt "\n", \ |
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(ls)->ls_name, ##args); \ |
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else if (dlm_config.ci_log_debug) \ |
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printk(KERN_DEBUG "dlm: %s: " fmt "\n", \ |
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(ls)->ls_name , ##args); \ |
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} while (0) |
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#define log_debug(ls, fmt, args...) \ |
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do { \ |
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if (dlm_config.ci_log_debug) \ |
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printk(KERN_DEBUG "dlm: %s: " fmt "\n", \ |
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(ls)->ls_name , ##args); \ |
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} while (0) |
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#define log_limit(ls, fmt, args...) \ |
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do { \ |
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if (dlm_config.ci_log_debug) \ |
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printk_ratelimited(KERN_DEBUG "dlm: %s: " fmt "\n", \ |
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(ls)->ls_name , ##args); \ |
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} while (0) |
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#define DLM_ASSERT(x, do) \ |
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{ \ |
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if (!(x)) \ |
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{ \ |
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printk(KERN_ERR "\nDLM: Assertion failed on line %d of file %s\n" \ |
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"DLM: assertion: \"%s\"\n" \ |
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"DLM: time = %lu\n", \ |
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__LINE__, __FILE__, #x, jiffies); \ |
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{do} \ |
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printk("\n"); \ |
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panic("DLM: Record message above and reboot.\n"); \ |
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} \ |
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} |
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#define DLM_RTF_SHRINK 0x00000001 |
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struct dlm_rsbtable { |
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struct rb_root keep; |
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struct rb_root toss; |
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spinlock_t lock; |
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uint32_t flags; |
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}; |
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/* |
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* Lockspace member (per node in a ls) |
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*/ |
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struct dlm_member { |
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struct list_head list; |
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int nodeid; |
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int weight; |
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int slot; |
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int slot_prev; |
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int comm_seq; |
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uint32_t generation; |
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}; |
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/* |
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* Save and manage recovery state for a lockspace. |
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*/ |
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struct dlm_recover { |
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struct list_head list; |
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struct dlm_config_node *nodes; |
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int nodes_count; |
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uint64_t seq; |
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}; |
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/* |
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* Pass input args to second stage locking function. |
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*/ |
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struct dlm_args { |
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uint32_t flags; |
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void (*astfn) (void *astparam); |
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void *astparam; |
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void (*bastfn) (void *astparam, int mode); |
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int mode; |
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struct dlm_lksb *lksb; |
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unsigned long timeout; |
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}; |
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/* |
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* Lock block |
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* |
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* A lock can be one of three types: |
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* |
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* local copy lock is mastered locally |
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* (lkb_nodeid is zero and DLM_LKF_MSTCPY is not set) |
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* process copy lock is mastered on a remote node |
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* (lkb_nodeid is non-zero and DLM_LKF_MSTCPY is not set) |
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* master copy master node's copy of a lock owned by remote node |
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* (lkb_nodeid is non-zero and DLM_LKF_MSTCPY is set) |
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* |
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* lkb_exflags: a copy of the most recent flags arg provided to dlm_lock or |
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* dlm_unlock. The dlm does not modify these or use any private flags in |
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* this field; it only contains DLM_LKF_ flags from dlm.h. These flags |
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* are sent as-is to the remote master when the lock is remote. |
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* |
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* lkb_flags: internal dlm flags (DLM_IFL_ prefix) from dlm_internal.h. |
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* Some internal flags are shared between the master and process nodes; |
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* these shared flags are kept in the lower two bytes. One of these |
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* flags set on the master copy will be propagated to the process copy |
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* and v.v. Other internal flags are private to the master or process |
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* node (e.g. DLM_IFL_MSTCPY). These are kept in the high two bytes. |
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* |
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* lkb_sbflags: status block flags. These flags are copied directly into |
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* the caller's lksb.sb_flags prior to the dlm_lock/dlm_unlock completion |
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* ast. All defined in dlm.h with DLM_SBF_ prefix. |
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* |
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* lkb_status: the lock status indicates which rsb queue the lock is |
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* on, grant, convert, or wait. DLM_LKSTS_ WAITING/GRANTED/CONVERT |
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* |
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* lkb_wait_type: the dlm message type (DLM_MSG_ prefix) for which a |
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* reply is needed. Only set when the lkb is on the lockspace waiters |
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* list awaiting a reply from a remote node. |
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* |
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* lkb_nodeid: when the lkb is a local copy, nodeid is 0; when the lkb |
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* is a master copy, nodeid specifies the remote lock holder, when the |
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* lkb is a process copy, the nodeid specifies the lock master. |
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*/ |
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/* lkb_status */ |
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#define DLM_LKSTS_WAITING 1 |
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#define DLM_LKSTS_GRANTED 2 |
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#define DLM_LKSTS_CONVERT 3 |
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/* lkb_flags */ |
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#define DLM_IFL_MSTCPY 0x00010000 |
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#define DLM_IFL_RESEND 0x00020000 |
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#define DLM_IFL_DEAD 0x00040000 |
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#define DLM_IFL_OVERLAP_UNLOCK 0x00080000 |
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#define DLM_IFL_OVERLAP_CANCEL 0x00100000 |
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#define DLM_IFL_ENDOFLIFE 0x00200000 |
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#define DLM_IFL_WATCH_TIMEWARN 0x00400000 |
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#define DLM_IFL_TIMEOUT_CANCEL 0x00800000 |
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#define DLM_IFL_DEADLOCK_CANCEL 0x01000000 |
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#define DLM_IFL_STUB_MS 0x02000000 /* magic number for m_flags */ |
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#define DLM_IFL_USER 0x00000001 |
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#define DLM_IFL_ORPHAN 0x00000002 |
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#define DLM_CALLBACKS_SIZE 6 |
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#define DLM_CB_CAST 0x00000001 |
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#define DLM_CB_BAST 0x00000002 |
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#define DLM_CB_SKIP 0x00000004 |
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struct dlm_callback { |
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uint64_t seq; |
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uint32_t flags; /* DLM_CBF_ */ |
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int sb_status; /* copy to lksb status */ |
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uint8_t sb_flags; /* copy to lksb flags */ |
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int8_t mode; /* rq mode of bast, gr mode of cast */ |
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}; |
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struct dlm_lkb { |
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struct dlm_rsb *lkb_resource; /* the rsb */ |
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struct kref lkb_ref; |
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int lkb_nodeid; /* copied from rsb */ |
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int lkb_ownpid; /* pid of lock owner */ |
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uint32_t lkb_id; /* our lock ID */ |
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uint32_t lkb_remid; /* lock ID on remote partner */ |
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uint32_t lkb_exflags; /* external flags from caller */ |
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uint32_t lkb_sbflags; /* lksb flags */ |
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uint32_t lkb_flags; /* internal flags */ |
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uint32_t lkb_lvbseq; /* lvb sequence number */ |
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int8_t lkb_status; /* granted, waiting, convert */ |
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int8_t lkb_rqmode; /* requested lock mode */ |
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int8_t lkb_grmode; /* granted lock mode */ |
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int8_t lkb_highbast; /* highest mode bast sent for */ |
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int8_t lkb_wait_type; /* type of reply waiting for */ |
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int8_t lkb_wait_count; |
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int lkb_wait_nodeid; /* for debugging */ |
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struct list_head lkb_statequeue; /* rsb g/c/w list */ |
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struct list_head lkb_rsb_lookup; /* waiting for rsb lookup */ |
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struct list_head lkb_wait_reply; /* waiting for remote reply */ |
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struct list_head lkb_ownqueue; /* list of locks for a process */ |
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struct list_head lkb_time_list; |
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ktime_t lkb_timestamp; |
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ktime_t lkb_wait_time; |
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unsigned long lkb_timeout_cs; |
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struct mutex lkb_cb_mutex; |
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struct work_struct lkb_cb_work; |
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struct list_head lkb_cb_list; /* for ls_cb_delay or proc->asts */ |
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struct dlm_callback lkb_callbacks[DLM_CALLBACKS_SIZE]; |
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struct dlm_callback lkb_last_cast; |
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struct dlm_callback lkb_last_bast; |
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ktime_t lkb_last_cast_time; /* for debugging */ |
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ktime_t lkb_last_bast_time; /* for debugging */ |
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uint64_t lkb_recover_seq; /* from ls_recover_seq */ |
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char *lkb_lvbptr; |
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struct dlm_lksb *lkb_lksb; /* caller's status block */ |
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void (*lkb_astfn) (void *astparam); |
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void (*lkb_bastfn) (void *astparam, int mode); |
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union { |
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void *lkb_astparam; /* caller's ast arg */ |
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struct dlm_user_args *lkb_ua; |
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}; |
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}; |
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/* |
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* res_master_nodeid is "normal": 0 is unset/invalid, non-zero is the real |
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* nodeid, even when nodeid is our_nodeid. |
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* |
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* res_nodeid is "odd": -1 is unset/invalid, zero means our_nodeid, |
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* greater than zero when another nodeid. |
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* |
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* (TODO: remove res_nodeid and only use res_master_nodeid) |
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*/ |
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struct dlm_rsb { |
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struct dlm_ls *res_ls; /* the lockspace */ |
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struct kref res_ref; |
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struct mutex res_mutex; |
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unsigned long res_flags; |
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int res_length; /* length of rsb name */ |
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int res_nodeid; |
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int res_master_nodeid; |
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int res_dir_nodeid; |
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int res_id; /* for ls_recover_idr */ |
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uint32_t res_lvbseq; |
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uint32_t res_hash; |
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uint32_t res_bucket; /* rsbtbl */ |
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unsigned long res_toss_time; |
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uint32_t res_first_lkid; |
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struct list_head res_lookup; /* lkbs waiting on first */ |
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union { |
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struct list_head res_hashchain; |
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struct rb_node res_hashnode; /* rsbtbl */ |
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}; |
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struct list_head res_grantqueue; |
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struct list_head res_convertqueue; |
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struct list_head res_waitqueue; |
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struct list_head res_root_list; /* used for recovery */ |
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struct list_head res_recover_list; /* used for recovery */ |
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int res_recover_locks_count; |
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char *res_lvbptr; |
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char res_name[DLM_RESNAME_MAXLEN+1]; |
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}; |
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/* dlm_master_lookup() flags */ |
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#define DLM_LU_RECOVER_DIR 1 |
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#define DLM_LU_RECOVER_MASTER 2 |
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/* dlm_master_lookup() results */ |
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#define DLM_LU_MATCH 1 |
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#define DLM_LU_ADD 2 |
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/* find_rsb() flags */ |
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#define R_REQUEST 0x00000001 |
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#define R_RECEIVE_REQUEST 0x00000002 |
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#define R_RECEIVE_RECOVER 0x00000004 |
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/* rsb_flags */ |
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enum rsb_flags { |
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RSB_MASTER_UNCERTAIN, |
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RSB_VALNOTVALID, |
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RSB_VALNOTVALID_PREV, |
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RSB_NEW_MASTER, |
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RSB_NEW_MASTER2, |
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RSB_RECOVER_CONVERT, |
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RSB_RECOVER_GRANT, |
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RSB_RECOVER_LVB_INVAL, |
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}; |
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static inline void rsb_set_flag(struct dlm_rsb *r, enum rsb_flags flag) |
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{ |
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__set_bit(flag, &r->res_flags); |
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} |
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static inline void rsb_clear_flag(struct dlm_rsb *r, enum rsb_flags flag) |
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{ |
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__clear_bit(flag, &r->res_flags); |
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} |
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static inline int rsb_flag(struct dlm_rsb *r, enum rsb_flags flag) |
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{ |
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return test_bit(flag, &r->res_flags); |
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} |
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/* dlm_header is first element of all structs sent between nodes */ |
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#define DLM_HEADER_MAJOR 0x00030000 |
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#define DLM_HEADER_MINOR 0x00000002 |
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#define DLM_VERSION_3_1 0x00030001 |
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#define DLM_VERSION_3_2 0x00030002 |
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#define DLM_HEADER_SLOTS 0x00000001 |
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#define DLM_MSG 1 |
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#define DLM_RCOM 2 |
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#define DLM_OPTS 3 |
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#define DLM_ACK 4 |
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#define DLM_FIN 5 |
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struct dlm_header { |
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uint32_t h_version; |
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union { |
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/* for DLM_MSG and DLM_RCOM */ |
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uint32_t h_lockspace; |
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/* for DLM_ACK and DLM_OPTS */ |
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uint32_t h_seq; |
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} u; |
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uint32_t h_nodeid; /* nodeid of sender */ |
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uint16_t h_length; |
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uint8_t h_cmd; /* DLM_MSG, DLM_RCOM */ |
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uint8_t h_pad; |
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}; |
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#define DLM_MSG_REQUEST 1 |
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#define DLM_MSG_CONVERT 2 |
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#define DLM_MSG_UNLOCK 3 |
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#define DLM_MSG_CANCEL 4 |
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#define DLM_MSG_REQUEST_REPLY 5 |
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#define DLM_MSG_CONVERT_REPLY 6 |
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#define DLM_MSG_UNLOCK_REPLY 7 |
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#define DLM_MSG_CANCEL_REPLY 8 |
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#define DLM_MSG_GRANT 9 |
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#define DLM_MSG_BAST 10 |
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#define DLM_MSG_LOOKUP 11 |
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#define DLM_MSG_REMOVE 12 |
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#define DLM_MSG_LOOKUP_REPLY 13 |
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#define DLM_MSG_PURGE 14 |
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struct dlm_message { |
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struct dlm_header m_header; |
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uint32_t m_type; /* DLM_MSG_ */ |
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uint32_t m_nodeid; |
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uint32_t m_pid; |
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uint32_t m_lkid; /* lkid on sender */ |
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uint32_t m_remid; /* lkid on receiver */ |
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uint32_t m_parent_lkid; |
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uint32_t m_parent_remid; |
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uint32_t m_exflags; |
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uint32_t m_sbflags; |
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uint32_t m_flags; |
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uint32_t m_lvbseq; |
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uint32_t m_hash; |
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int m_status; |
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int m_grmode; |
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int m_rqmode; |
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int m_bastmode; |
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int m_asts; |
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int m_result; /* 0 or -EXXX */ |
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char m_extra[]; /* name or lvb */ |
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}; |
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#define DLM_RS_NODES 0x00000001 |
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#define DLM_RS_NODES_ALL 0x00000002 |
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#define DLM_RS_DIR 0x00000004 |
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#define DLM_RS_DIR_ALL 0x00000008 |
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#define DLM_RS_LOCKS 0x00000010 |
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#define DLM_RS_LOCKS_ALL 0x00000020 |
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#define DLM_RS_DONE 0x00000040 |
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#define DLM_RS_DONE_ALL 0x00000080 |
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#define DLM_RCOM_STATUS 1 |
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#define DLM_RCOM_NAMES 2 |
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#define DLM_RCOM_LOOKUP 3 |
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#define DLM_RCOM_LOCK 4 |
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#define DLM_RCOM_STATUS_REPLY 5 |
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#define DLM_RCOM_NAMES_REPLY 6 |
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#define DLM_RCOM_LOOKUP_REPLY 7 |
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#define DLM_RCOM_LOCK_REPLY 8 |
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struct dlm_rcom { |
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struct dlm_header rc_header; |
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uint32_t rc_type; /* DLM_RCOM_ */ |
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int rc_result; /* multi-purpose */ |
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uint64_t rc_id; /* match reply with request */ |
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uint64_t rc_seq; /* sender's ls_recover_seq */ |
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uint64_t rc_seq_reply; /* remote ls_recover_seq */ |
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char rc_buf[]; |
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}; |
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struct dlm_opt_header { |
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uint16_t t_type; |
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uint16_t t_length; |
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uint32_t o_pad; |
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/* need to be 8 byte aligned */ |
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char t_value[]; |
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}; |
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/* encapsulation header */ |
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struct dlm_opts { |
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struct dlm_header o_header; |
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uint8_t o_nextcmd; |
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uint8_t o_pad; |
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uint16_t o_optlen; |
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uint32_t o_pad2; |
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char o_opts[]; |
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}; |
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union dlm_packet { |
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struct dlm_header header; /* common to other two */ |
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struct dlm_message message; |
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struct dlm_rcom rcom; |
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struct dlm_opts opts; |
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}; |
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#define DLM_RSF_NEED_SLOTS 0x00000001 |
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/* RCOM_STATUS data */ |
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struct rcom_status { |
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__le32 rs_flags; |
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__le32 rs_unused1; |
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__le64 rs_unused2; |
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}; |
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/* RCOM_STATUS_REPLY data */ |
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struct rcom_config { |
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__le32 rf_lvblen; |
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__le32 rf_lsflags; |
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/* DLM_HEADER_SLOTS adds: */ |
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__le32 rf_flags; |
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__le16 rf_our_slot; |
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__le16 rf_num_slots; |
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__le32 rf_generation; |
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__le32 rf_unused1; |
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__le64 rf_unused2; |
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}; |
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struct rcom_slot { |
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__le32 ro_nodeid; |
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__le16 ro_slot; |
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__le16 ro_unused1; |
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__le64 ro_unused2; |
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}; |
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struct rcom_lock { |
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__le32 rl_ownpid; |
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__le32 rl_lkid; |
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__le32 rl_remid; |
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__le32 rl_parent_lkid; |
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__le32 rl_parent_remid; |
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__le32 rl_exflags; |
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__le32 rl_flags; |
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__le32 rl_lvbseq; |
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__le32 rl_result; |
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int8_t rl_rqmode; |
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int8_t rl_grmode; |
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int8_t rl_status; |
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int8_t rl_asts; |
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__le16 rl_wait_type; |
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__le16 rl_namelen; |
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char rl_name[DLM_RESNAME_MAXLEN]; |
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char rl_lvb[]; |
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}; |
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/* |
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* The max number of resources per rsbtbl bucket that shrink will attempt |
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* to remove in each iteration. |
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*/ |
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#define DLM_REMOVE_NAMES_MAX 8 |
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|
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struct dlm_ls { |
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struct list_head ls_list; /* list of lockspaces */ |
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dlm_lockspace_t *ls_local_handle; |
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uint32_t ls_global_id; /* global unique lockspace ID */ |
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uint32_t ls_generation; |
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uint32_t ls_exflags; |
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int ls_lvblen; |
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int ls_count; /* refcount of processes in |
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the dlm using this ls */ |
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int ls_create_count; /* create/release refcount */ |
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unsigned long ls_flags; /* LSFL_ */ |
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unsigned long ls_scan_time; |
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struct kobject ls_kobj; |
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struct idr ls_lkbidr; |
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spinlock_t ls_lkbidr_spin; |
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struct dlm_rsbtable *ls_rsbtbl; |
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uint32_t ls_rsbtbl_size; |
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struct mutex ls_waiters_mutex; |
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struct list_head ls_waiters; /* lkbs needing a reply */ |
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struct mutex ls_orphans_mutex; |
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struct list_head ls_orphans; |
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struct mutex ls_timeout_mutex; |
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struct list_head ls_timeout; |
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spinlock_t ls_new_rsb_spin; |
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int ls_new_rsb_count; |
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struct list_head ls_new_rsb; /* new rsb structs */ |
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spinlock_t ls_remove_spin; |
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char ls_remove_name[DLM_RESNAME_MAXLEN+1]; |
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char *ls_remove_names[DLM_REMOVE_NAMES_MAX]; |
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int ls_remove_len; |
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int ls_remove_lens[DLM_REMOVE_NAMES_MAX]; |
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struct list_head ls_nodes; /* current nodes in ls */ |
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struct list_head ls_nodes_gone; /* dead node list, recovery */ |
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int ls_num_nodes; /* number of nodes in ls */ |
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int ls_low_nodeid; |
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int ls_total_weight; |
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int *ls_node_array; |
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int ls_slot; |
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int ls_num_slots; |
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int ls_slots_size; |
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struct dlm_slot *ls_slots; |
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struct dlm_rsb ls_stub_rsb; /* for returning errors */ |
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struct dlm_lkb ls_stub_lkb; /* for returning errors */ |
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struct dlm_message ls_stub_ms; /* for faking a reply */ |
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struct dentry *ls_debug_rsb_dentry; /* debugfs */ |
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struct dentry *ls_debug_waiters_dentry; /* debugfs */ |
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struct dentry *ls_debug_locks_dentry; /* debugfs */ |
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struct dentry *ls_debug_all_dentry; /* debugfs */ |
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struct dentry *ls_debug_toss_dentry; /* debugfs */ |
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wait_queue_head_t ls_uevent_wait; /* user part of join/leave */ |
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int ls_uevent_result; |
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struct completion ls_members_done; |
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int ls_members_result; |
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struct miscdevice ls_device; |
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struct workqueue_struct *ls_callback_wq; |
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/* recovery related */ |
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struct mutex ls_cb_mutex; |
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struct list_head ls_cb_delay; /* save for queue_work later */ |
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struct timer_list ls_timer; |
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struct task_struct *ls_recoverd_task; |
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struct mutex ls_recoverd_active; |
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spinlock_t ls_recover_lock; |
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unsigned long ls_recover_begin; /* jiffies timestamp */ |
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uint32_t ls_recover_status; /* DLM_RS_ */ |
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uint64_t ls_recover_seq; |
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struct dlm_recover *ls_recover_args; |
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struct rw_semaphore ls_in_recovery; /* block local requests */ |
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struct rw_semaphore ls_recv_active; /* block dlm_recv */ |
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struct list_head ls_requestqueue;/* queue remote requests */ |
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struct mutex ls_requestqueue_mutex; |
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struct dlm_rcom *ls_recover_buf; |
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int ls_recover_nodeid; /* for debugging */ |
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unsigned int ls_recover_dir_sent_res; /* for log info */ |
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unsigned int ls_recover_dir_sent_msg; /* for log info */ |
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unsigned int ls_recover_locks_in; /* for log info */ |
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uint64_t ls_rcom_seq; |
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spinlock_t ls_rcom_spin; |
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struct list_head ls_recover_list; |
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spinlock_t ls_recover_list_lock; |
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int ls_recover_list_count; |
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struct idr ls_recover_idr; |
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spinlock_t ls_recover_idr_lock; |
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wait_queue_head_t ls_wait_general; |
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wait_queue_head_t ls_recover_lock_wait; |
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struct mutex ls_clear_proc_locks; |
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struct list_head ls_root_list; /* root resources */ |
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struct rw_semaphore ls_root_sem; /* protect root_list */ |
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const struct dlm_lockspace_ops *ls_ops; |
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void *ls_ops_arg; |
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int ls_namelen; |
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char ls_name[1]; |
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}; |
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/* |
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* LSFL_RECOVER_STOP - dlm_ls_stop() sets this to tell dlm recovery routines |
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* that they should abort what they're doing so new recovery can be started. |
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* |
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* LSFL_RECOVER_DOWN - dlm_ls_stop() sets this to tell dlm_recoverd that it |
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* should do down_write() on the in_recovery rw_semaphore. (doing down_write |
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* within dlm_ls_stop causes complaints about the lock acquired/released |
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* in different contexts.) |
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* |
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* LSFL_RECOVER_LOCK - dlm_recoverd holds the in_recovery rw_semaphore. |
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* It sets this after it is done with down_write() on the in_recovery |
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* rw_semaphore and clears it after it has released the rw_semaphore. |
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* |
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* LSFL_RECOVER_WORK - dlm_ls_start() sets this to tell dlm_recoverd that it |
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* should begin recovery of the lockspace. |
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* |
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* LSFL_RUNNING - set when normal locking activity is enabled. |
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* dlm_ls_stop() clears this to tell dlm locking routines that they should |
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* quit what they are doing so recovery can run. dlm_recoverd sets |
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* this after recovery is finished. |
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*/ |
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#define LSFL_RECOVER_STOP 0 |
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#define LSFL_RECOVER_DOWN 1 |
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#define LSFL_RECOVER_LOCK 2 |
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#define LSFL_RECOVER_WORK 3 |
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#define LSFL_RUNNING 4 |
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#define LSFL_RCOM_READY 5 |
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#define LSFL_RCOM_WAIT 6 |
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#define LSFL_UEVENT_WAIT 7 |
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#define LSFL_TIMEWARN 8 |
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#define LSFL_CB_DELAY 9 |
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#define LSFL_NODIR 10 |
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/* much of this is just saving user space pointers associated with the |
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lock that we pass back to the user lib with an ast */ |
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struct dlm_user_args { |
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struct dlm_user_proc *proc; /* each process that opens the lockspace |
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device has private data |
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(dlm_user_proc) on the struct file, |
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the process's locks point back to it*/ |
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struct dlm_lksb lksb; |
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struct dlm_lksb __user *user_lksb; |
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void __user *castparam; |
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void __user *castaddr; |
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void __user *bastparam; |
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void __user *bastaddr; |
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uint64_t xid; |
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}; |
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#define DLM_PROC_FLAGS_CLOSING 1 |
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#define DLM_PROC_FLAGS_COMPAT 2 |
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/* locks list is kept so we can remove all a process's locks when it |
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exits (or orphan those that are persistent) */ |
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struct dlm_user_proc { |
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dlm_lockspace_t *lockspace; |
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unsigned long flags; /* DLM_PROC_FLAGS */ |
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struct list_head asts; |
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spinlock_t asts_spin; |
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struct list_head locks; |
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spinlock_t locks_spin; |
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struct list_head unlocking; |
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wait_queue_head_t wait; |
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}; |
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static inline int dlm_locking_stopped(struct dlm_ls *ls) |
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{ |
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return !test_bit(LSFL_RUNNING, &ls->ls_flags); |
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} |
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static inline int dlm_recovery_stopped(struct dlm_ls *ls) |
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{ |
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return test_bit(LSFL_RECOVER_STOP, &ls->ls_flags); |
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} |
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static inline int dlm_no_directory(struct dlm_ls *ls) |
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{ |
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return test_bit(LSFL_NODIR, &ls->ls_flags); |
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} |
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int dlm_netlink_init(void); |
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void dlm_netlink_exit(void); |
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void dlm_timeout_warn(struct dlm_lkb *lkb); |
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int dlm_plock_init(void); |
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void dlm_plock_exit(void); |
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#ifdef CONFIG_DLM_DEBUG |
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void dlm_register_debugfs(void); |
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void dlm_unregister_debugfs(void); |
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void dlm_create_debug_file(struct dlm_ls *ls); |
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void dlm_delete_debug_file(struct dlm_ls *ls); |
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void *dlm_create_debug_comms_file(int nodeid, void *data); |
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void dlm_delete_debug_comms_file(void *ctx); |
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#else |
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static inline void dlm_register_debugfs(void) { } |
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static inline void dlm_unregister_debugfs(void) { } |
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static inline void dlm_create_debug_file(struct dlm_ls *ls) { } |
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static inline void dlm_delete_debug_file(struct dlm_ls *ls) { } |
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static inline void *dlm_create_debug_comms_file(int nodeid, void *data) { return NULL; } |
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static inline void dlm_delete_debug_comms_file(void *ctx) { } |
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#endif |
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#endif /* __DLM_INTERNAL_DOT_H__ */ |
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