2522fe45a186e (Thomas Gleixner 2019-05-28 09:57:20 -0700 1) /* SPDX-License-Identifier: GPL-2.0-only */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 2) /******************************************************************************
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 3) *******************************************************************************
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 4) **
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 5) ** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
60f98d1839376 (David Teigland 2011-11-02 14:30:58 -0500 6) ** Copyright (C) 2004-2011 Red Hat, Inc. All rights reserved.
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 7) **
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 8) **
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 9) *******************************************************************************
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 10) ******************************************************************************/
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 11)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 12) #ifndef __DLM_INTERNAL_DOT_H__
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 13) #define __DLM_INTERNAL_DOT_H__
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 14)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 15) /*
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 16) * This is the main header file to be included in each DLM source file.
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 17) */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 18)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 19) #include <linux/slab.h>
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 20) #include <linux/sched.h>
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 21) #include <linux/types.h>
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 22) #include <linux/ctype.h>
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 23) #include <linux/spinlock.h>
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 24) #include <linux/vmalloc.h>
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 25) #include <linux/list.h>
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 26) #include <linux/errno.h>
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 27) #include <linux/random.h>
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 28) #include <linux/delay.h>
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 29) #include <linux/socket.h>
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 30) #include <linux/kthread.h>
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 31) #include <linux/kobject.h>
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 32) #include <linux/kref.h>
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 33) #include <linux/kernel.h>
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 34) #include <linux/jhash.h>
597d0cae0f99f (David Teigland 2006-07-12 16:44:04 -0500 35) #include <linux/miscdevice.h>
901359256b266 (David Teigland 2006-01-20 08:47:07 +0000 36) #include <linux/mutex.h>
3d6aa675fff9e (David Teigland 2011-07-06 17:00:54 -0500 37) #include <linux/idr.h>
d6e24788d21c4 (David Teigland 2012-04-23 13:58:42 -0500 38) #include <linux/ratelimit.h>
7c0f6ba682b9c (Linus Torvalds 2016-12-24 11:46:01 -0800 39) #include <linux/uaccess.h>
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 40)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 41) #include <linux/dlm.h>
99fc64874aad1 (David Teigland 2007-01-09 09:44:01 -0600 42) #include "config.h"
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 43)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 44) /* Size of the temp buffer midcomms allocates on the stack.
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 45) We try to make this large enough so most messages fit.
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 46) FIXME: should sctp make this unnecessary? */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 47)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 48) #define DLM_INBUF_LEN 148
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 49)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 50) struct dlm_ls;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 51) struct dlm_lkb;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 52) struct dlm_rsb;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 53) struct dlm_member;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 54) struct dlm_rsbtable;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 55) struct dlm_recover;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 56) struct dlm_header;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 57) struct dlm_message;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 58) struct dlm_rcom;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 59) struct dlm_mhandle;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 60)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 61) #define log_print(fmt, args...) \
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 62) printk(KERN_ERR "dlm: "fmt"\n" , ##args)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 63) #define log_error(ls, fmt, args...) \
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 64) printk(KERN_ERR "dlm: %s: " fmt "\n", (ls)->ls_name , ##args)
505ee5283c3d2 (Zhilong Liu 2016-06-19 23:52:46 -0500 65)
075f01775f536 (David Teigland 2014-02-14 11:54:44 -0600 66) #define log_rinfo(ls, fmt, args...) \
505ee5283c3d2 (Zhilong Liu 2016-06-19 23:52:46 -0500 67) do { \
505ee5283c3d2 (Zhilong Liu 2016-06-19 23:52:46 -0500 68) if (dlm_config.ci_log_info) \
505ee5283c3d2 (Zhilong Liu 2016-06-19 23:52:46 -0500 69) printk(KERN_INFO "dlm: %s: " fmt "\n", \
505ee5283c3d2 (Zhilong Liu 2016-06-19 23:52:46 -0500 70) (ls)->ls_name, ##args); \
505ee5283c3d2 (Zhilong Liu 2016-06-19 23:52:46 -0500 71) else if (dlm_config.ci_log_debug) \
505ee5283c3d2 (Zhilong Liu 2016-06-19 23:52:46 -0500 72) printk(KERN_DEBUG "dlm: %s: " fmt "\n", \
505ee5283c3d2 (Zhilong Liu 2016-06-19 23:52:46 -0500 73) (ls)->ls_name , ##args); \
505ee5283c3d2 (Zhilong Liu 2016-06-19 23:52:46 -0500 74) } while (0)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 75)
99fc64874aad1 (David Teigland 2007-01-09 09:44:01 -0600 76) #define log_debug(ls, fmt, args...) \
99fc64874aad1 (David Teigland 2007-01-09 09:44:01 -0600 77) do { \
99fc64874aad1 (David Teigland 2007-01-09 09:44:01 -0600 78) if (dlm_config.ci_log_debug) \
99fc64874aad1 (David Teigland 2007-01-09 09:44:01 -0600 79) printk(KERN_DEBUG "dlm: %s: " fmt "\n", \
99fc64874aad1 (David Teigland 2007-01-09 09:44:01 -0600 80) (ls)->ls_name , ##args); \
99fc64874aad1 (David Teigland 2007-01-09 09:44:01 -0600 81) } while (0)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 82)
d6e24788d21c4 (David Teigland 2012-04-23 13:58:42 -0500 83) #define log_limit(ls, fmt, args...) \
d6e24788d21c4 (David Teigland 2012-04-23 13:58:42 -0500 84) do { \
d6e24788d21c4 (David Teigland 2012-04-23 13:58:42 -0500 85) if (dlm_config.ci_log_debug) \
d6e24788d21c4 (David Teigland 2012-04-23 13:58:42 -0500 86) printk_ratelimited(KERN_DEBUG "dlm: %s: " fmt "\n", \
d6e24788d21c4 (David Teigland 2012-04-23 13:58:42 -0500 87) (ls)->ls_name , ##args); \
d6e24788d21c4 (David Teigland 2012-04-23 13:58:42 -0500 88) } while (0)
d6e24788d21c4 (David Teigland 2012-04-23 13:58:42 -0500 89)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 90) #define DLM_ASSERT(x, do) \
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 91) { \
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 92) if (!(x)) \
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 93) { \
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 94) printk(KERN_ERR "\nDLM: Assertion failed on line %d of file %s\n" \
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 95) "DLM: assertion: \"%s\"\n" \
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 96) "DLM: time = %lu\n", \
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 97) __LINE__, __FILE__, #x, jiffies); \
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 98) {do} \
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 99) printk("\n"); \
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 100) panic("DLM: Record message above and reboot.\n"); \
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 101) } \
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 102) }
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 103)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 104)
f11722834605a (David Teigland 2013-01-07 11:03:42 -0600 105) #define DLM_RTF_SHRINK 0x00000001
f11722834605a (David Teigland 2013-01-07 11:03:42 -0600 106)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 107) struct dlm_rsbtable {
9beb3bf5a92bb (Bob Peterson 2011-10-26 15:24:55 -0500 108) struct rb_root keep;
9beb3bf5a92bb (Bob Peterson 2011-10-26 15:24:55 -0500 109) struct rb_root toss;
c7be761a8163d (David Teigland 2009-01-07 16:50:41 -0600 110) spinlock_t lock;
f11722834605a (David Teigland 2013-01-07 11:03:42 -0600 111) uint32_t flags;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 112) };
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 113)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 114)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 115) /*
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 116) * Lockspace member (per node in a ls)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 117) */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 118)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 119) struct dlm_member {
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 120) struct list_head list;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 121) int nodeid;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 122) int weight;
757a427196354 (David Teigland 2011-10-20 13:26:28 -0500 123) int slot;
757a427196354 (David Teigland 2011-10-20 13:26:28 -0500 124) int slot_prev;
60f98d1839376 (David Teigland 2011-11-02 14:30:58 -0500 125) int comm_seq;
757a427196354 (David Teigland 2011-10-20 13:26:28 -0500 126) uint32_t generation;
757a427196354 (David Teigland 2011-10-20 13:26:28 -0500 127) };
757a427196354 (David Teigland 2011-10-20 13:26:28 -0500 128)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 129) /*
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 130) * Save and manage recovery state for a lockspace.
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 131) */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 132)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 133) struct dlm_recover {
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 134) struct list_head list;
60f98d1839376 (David Teigland 2011-11-02 14:30:58 -0500 135) struct dlm_config_node *nodes;
60f98d1839376 (David Teigland 2011-11-02 14:30:58 -0500 136) int nodes_count;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 137) uint64_t seq;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 138) };
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 139)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 140) /*
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 141) * Pass input args to second stage locking function.
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 142) */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 143)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 144) struct dlm_args {
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 145) uint32_t flags;
e5dae548b0b53 (David Teigland 2008-02-06 00:35:45 -0600 146) void (*astfn) (void *astparam);
e5dae548b0b53 (David Teigland 2008-02-06 00:35:45 -0600 147) void *astparam;
e5dae548b0b53 (David Teigland 2008-02-06 00:35:45 -0600 148) void (*bastfn) (void *astparam, int mode);
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 149) int mode;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 150) struct dlm_lksb *lksb;
d7db923ea4990 (David Teigland 2007-05-18 09:00:32 -0500 151) unsigned long timeout;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 152) };
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 153)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 154)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 155) /*
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 156) * Lock block
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 157) *
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 158) * A lock can be one of three types:
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 159) *
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 160) * local copy lock is mastered locally
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 161) * (lkb_nodeid is zero and DLM_LKF_MSTCPY is not set)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 162) * process copy lock is mastered on a remote node
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 163) * (lkb_nodeid is non-zero and DLM_LKF_MSTCPY is not set)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 164) * master copy master node's copy of a lock owned by remote node
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 165) * (lkb_nodeid is non-zero and DLM_LKF_MSTCPY is set)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 166) *
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 167) * lkb_exflags: a copy of the most recent flags arg provided to dlm_lock or
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 168) * dlm_unlock. The dlm does not modify these or use any private flags in
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 169) * this field; it only contains DLM_LKF_ flags from dlm.h. These flags
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 170) * are sent as-is to the remote master when the lock is remote.
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 171) *
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 172) * lkb_flags: internal dlm flags (DLM_IFL_ prefix) from dlm_internal.h.
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 173) * Some internal flags are shared between the master and process nodes;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 174) * these shared flags are kept in the lower two bytes. One of these
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 175) * flags set on the master copy will be propagated to the process copy
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 176) * and v.v. Other internal flags are private to the master or process
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 177) * node (e.g. DLM_IFL_MSTCPY). These are kept in the high two bytes.
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 178) *
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 179) * lkb_sbflags: status block flags. These flags are copied directly into
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 180) * the caller's lksb.sb_flags prior to the dlm_lock/dlm_unlock completion
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 181) * ast. All defined in dlm.h with DLM_SBF_ prefix.
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 182) *
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 183) * lkb_status: the lock status indicates which rsb queue the lock is
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 184) * on, grant, convert, or wait. DLM_LKSTS_ WAITING/GRANTED/CONVERT
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 185) *
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 186) * lkb_wait_type: the dlm message type (DLM_MSG_ prefix) for which a
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 187) * reply is needed. Only set when the lkb is on the lockspace waiters
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 188) * list awaiting a reply from a remote node.
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 189) *
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 190) * lkb_nodeid: when the lkb is a local copy, nodeid is 0; when the lkb
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 191) * is a master copy, nodeid specifies the remote lock holder, when the
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 192) * lkb is a process copy, the nodeid specifies the lock master.
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 193) */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 194)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 195) /* lkb_status */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 196)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 197) #define DLM_LKSTS_WAITING 1
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 198) #define DLM_LKSTS_GRANTED 2
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 199) #define DLM_LKSTS_CONVERT 3
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 200)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 201) /* lkb_flags */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 202)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 203) #define DLM_IFL_MSTCPY 0x00010000
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 204) #define DLM_IFL_RESEND 0x00020000
597d0cae0f99f (David Teigland 2006-07-12 16:44:04 -0500 205) #define DLM_IFL_DEAD 0x00040000
ef0c2bb05f40f (David Teigland 2007-03-28 09:56:46 -0500 206) #define DLM_IFL_OVERLAP_UNLOCK 0x00080000
ef0c2bb05f40f (David Teigland 2007-03-28 09:56:46 -0500 207) #define DLM_IFL_OVERLAP_CANCEL 0x00100000
ef0c2bb05f40f (David Teigland 2007-03-28 09:56:46 -0500 208) #define DLM_IFL_ENDOFLIFE 0x00200000
3ae1acf93a215 (David Teigland 2007-05-18 08:59:31 -0500 209) #define DLM_IFL_WATCH_TIMEWARN 0x00400000
84d8cd69a8e7f (David Teigland 2007-05-29 08:44:23 -0500 210) #define DLM_IFL_TIMEOUT_CANCEL 0x00800000
8b4021fa436f7 (David Teigland 2007-05-29 08:46:00 -0500 211) #define DLM_IFL_DEADLOCK_CANCEL 0x01000000
2a7ce0edd661b (David Teigland 2011-04-04 15:19:59 -0500 212) #define DLM_IFL_STUB_MS 0x02000000 /* magic number for m_flags */
597d0cae0f99f (David Teigland 2006-07-12 16:44:04 -0500 213) #define DLM_IFL_USER 0x00000001
597d0cae0f99f (David Teigland 2006-07-12 16:44:04 -0500 214) #define DLM_IFL_ORPHAN 0x00000002
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 215)
8304d6f24cc12 (David Teigland 2011-02-21 14:58:21 -0600 216) #define DLM_CALLBACKS_SIZE 6
8304d6f24cc12 (David Teigland 2011-02-21 14:58:21 -0600 217)
8304d6f24cc12 (David Teigland 2011-02-21 14:58:21 -0600 218) #define DLM_CB_CAST 0x00000001
8304d6f24cc12 (David Teigland 2011-02-21 14:58:21 -0600 219) #define DLM_CB_BAST 0x00000002
8304d6f24cc12 (David Teigland 2011-02-21 14:58:21 -0600 220) #define DLM_CB_SKIP 0x00000004
8304d6f24cc12 (David Teigland 2011-02-21 14:58:21 -0600 221)
8304d6f24cc12 (David Teigland 2011-02-21 14:58:21 -0600 222) struct dlm_callback {
8304d6f24cc12 (David Teigland 2011-02-21 14:58:21 -0600 223) uint64_t seq;
8304d6f24cc12 (David Teigland 2011-02-21 14:58:21 -0600 224) uint32_t flags; /* DLM_CBF_ */
8304d6f24cc12 (David Teigland 2011-02-21 14:58:21 -0600 225) int sb_status; /* copy to lksb status */
8304d6f24cc12 (David Teigland 2011-02-21 14:58:21 -0600 226) uint8_t sb_flags; /* copy to lksb flags */
8304d6f24cc12 (David Teigland 2011-02-21 14:58:21 -0600 227) int8_t mode; /* rq mode of bast, gr mode of cast */
8304d6f24cc12 (David Teigland 2011-02-21 14:58:21 -0600 228) };
8304d6f24cc12 (David Teigland 2011-02-21 14:58:21 -0600 229)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 230) struct dlm_lkb {
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 231) struct dlm_rsb *lkb_resource; /* the rsb */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 232) struct kref lkb_ref;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 233) int lkb_nodeid; /* copied from rsb */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 234) int lkb_ownpid; /* pid of lock owner */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 235) uint32_t lkb_id; /* our lock ID */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 236) uint32_t lkb_remid; /* lock ID on remote partner */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 237) uint32_t lkb_exflags; /* external flags from caller */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 238) uint32_t lkb_sbflags; /* lksb flags */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 239) uint32_t lkb_flags; /* internal flags */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 240) uint32_t lkb_lvbseq; /* lvb sequence number */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 241)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 242) int8_t lkb_status; /* granted, waiting, convert */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 243) int8_t lkb_rqmode; /* requested lock mode */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 244) int8_t lkb_grmode; /* granted lock mode */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 245) int8_t lkb_highbast; /* highest mode bast sent for */
7fe2b3190b8b2 (David Teigland 2010-02-24 11:08:18 -0600 246)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 247) int8_t lkb_wait_type; /* type of reply waiting for */
ef0c2bb05f40f (David Teigland 2007-03-28 09:56:46 -0500 248) int8_t lkb_wait_count;
c6ff669bac5c4 (David Teigland 2011-03-28 14:17:26 -0500 249) int lkb_wait_nodeid; /* for debugging */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 250)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 251) struct list_head lkb_statequeue; /* rsb g/c/w list */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 252) struct list_head lkb_rsb_lookup; /* waiting for rsb lookup */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 253) struct list_head lkb_wait_reply; /* waiting for remote reply */
597d0cae0f99f (David Teigland 2006-07-12 16:44:04 -0500 254) struct list_head lkb_ownqueue; /* list of locks for a process */
3ae1acf93a215 (David Teigland 2007-05-18 08:59:31 -0500 255) struct list_head lkb_time_list;
eeda418d8c264 (David Teigland 2008-12-09 14:12:21 -0600 256) ktime_t lkb_timestamp;
c6ff669bac5c4 (David Teigland 2011-03-28 14:17:26 -0500 257) ktime_t lkb_wait_time;
3ae1acf93a215 (David Teigland 2007-05-18 08:59:31 -0500 258) unsigned long lkb_timeout_cs;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 259)
23e8e1aaacb10 (David Teigland 2011-04-05 13:16:24 -0500 260) struct mutex lkb_cb_mutex;
23e8e1aaacb10 (David Teigland 2011-04-05 13:16:24 -0500 261) struct work_struct lkb_cb_work;
23e8e1aaacb10 (David Teigland 2011-04-05 13:16:24 -0500 262) struct list_head lkb_cb_list; /* for ls_cb_delay or proc->asts */
8304d6f24cc12 (David Teigland 2011-02-21 14:58:21 -0600 263) struct dlm_callback lkb_callbacks[DLM_CALLBACKS_SIZE];
8304d6f24cc12 (David Teigland 2011-02-21 14:58:21 -0600 264) struct dlm_callback lkb_last_cast;
8304d6f24cc12 (David Teigland 2011-02-21 14:58:21 -0600 265) struct dlm_callback lkb_last_bast;
8304d6f24cc12 (David Teigland 2011-02-21 14:58:21 -0600 266) ktime_t lkb_last_cast_time; /* for debugging */
8304d6f24cc12 (David Teigland 2011-02-21 14:58:21 -0600 267) ktime_t lkb_last_bast_time; /* for debugging */
8304d6f24cc12 (David Teigland 2011-02-21 14:58:21 -0600 268)
4875647a08e35 (David Teigland 2012-04-26 15:54:29 -0500 269) uint64_t lkb_recover_seq; /* from ls_recover_seq */
4875647a08e35 (David Teigland 2012-04-26 15:54:29 -0500 270)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 271) char *lkb_lvbptr;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 272) struct dlm_lksb *lkb_lksb; /* caller's status block */
e5dae548b0b53 (David Teigland 2008-02-06 00:35:45 -0600 273) void (*lkb_astfn) (void *astparam);
e5dae548b0b53 (David Teigland 2008-02-06 00:35:45 -0600 274) void (*lkb_bastfn) (void *astparam, int mode);
d292c0cc489fa (David Teigland 2008-02-06 23:27:04 -0600 275) union {
d292c0cc489fa (David Teigland 2008-02-06 23:27:04 -0600 276) void *lkb_astparam; /* caller's ast arg */
d292c0cc489fa (David Teigland 2008-02-06 23:27:04 -0600 277) struct dlm_user_args *lkb_ua;
d292c0cc489fa (David Teigland 2008-02-06 23:27:04 -0600 278) };
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 279) };
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 280)
c04fecb4d9f77 (David Teigland 2012-05-10 10:18:07 -0500 281) /*
c04fecb4d9f77 (David Teigland 2012-05-10 10:18:07 -0500 282) * res_master_nodeid is "normal": 0 is unset/invalid, non-zero is the real
c04fecb4d9f77 (David Teigland 2012-05-10 10:18:07 -0500 283) * nodeid, even when nodeid is our_nodeid.
c04fecb4d9f77 (David Teigland 2012-05-10 10:18:07 -0500 284) *
c04fecb4d9f77 (David Teigland 2012-05-10 10:18:07 -0500 285) * res_nodeid is "odd": -1 is unset/invalid, zero means our_nodeid,
c04fecb4d9f77 (David Teigland 2012-05-10 10:18:07 -0500 286) * greater than zero when another nodeid.
c04fecb4d9f77 (David Teigland 2012-05-10 10:18:07 -0500 287) *
c04fecb4d9f77 (David Teigland 2012-05-10 10:18:07 -0500 288) * (TODO: remove res_nodeid and only use res_master_nodeid)
c04fecb4d9f77 (David Teigland 2012-05-10 10:18:07 -0500 289) */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 290)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 291) struct dlm_rsb {
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 292) struct dlm_ls *res_ls; /* the lockspace */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 293) struct kref res_ref;
901359256b266 (David Teigland 2006-01-20 08:47:07 +0000 294) struct mutex res_mutex;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 295) unsigned long res_flags;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 296) int res_length; /* length of rsb name */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 297) int res_nodeid;
c04fecb4d9f77 (David Teigland 2012-05-10 10:18:07 -0500 298) int res_master_nodeid;
c04fecb4d9f77 (David Teigland 2012-05-10 10:18:07 -0500 299) int res_dir_nodeid;
1d7c484eeb167 (David Teigland 2012-05-15 16:07:49 -0500 300) int res_id; /* for ls_recover_idr */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 301) uint32_t res_lvbseq;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 302) uint32_t res_hash;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 303) uint32_t res_bucket; /* rsbtbl */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 304) unsigned long res_toss_time;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 305) uint32_t res_first_lkid;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 306) struct list_head res_lookup; /* lkbs waiting on first */
9beb3bf5a92bb (Bob Peterson 2011-10-26 15:24:55 -0500 307) union {
9beb3bf5a92bb (Bob Peterson 2011-10-26 15:24:55 -0500 308) struct list_head res_hashchain;
9beb3bf5a92bb (Bob Peterson 2011-10-26 15:24:55 -0500 309) struct rb_node res_hashnode; /* rsbtbl */
9beb3bf5a92bb (Bob Peterson 2011-10-26 15:24:55 -0500 310) };
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 311) struct list_head res_grantqueue;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 312) struct list_head res_convertqueue;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 313) struct list_head res_waitqueue;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 314)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 315) struct list_head res_root_list; /* used for recovery */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 316) struct list_head res_recover_list; /* used for recovery */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 317) int res_recover_locks_count;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 318)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 319) char *res_lvbptr;
3881ac04ebf94 (David Teigland 2011-07-07 14:05:03 -0500 320) char res_name[DLM_RESNAME_MAXLEN+1];
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 321) };
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 322)
c04fecb4d9f77 (David Teigland 2012-05-10 10:18:07 -0500 323) /* dlm_master_lookup() flags */
c04fecb4d9f77 (David Teigland 2012-05-10 10:18:07 -0500 324)
c04fecb4d9f77 (David Teigland 2012-05-10 10:18:07 -0500 325) #define DLM_LU_RECOVER_DIR 1
c04fecb4d9f77 (David Teigland 2012-05-10 10:18:07 -0500 326) #define DLM_LU_RECOVER_MASTER 2
c04fecb4d9f77 (David Teigland 2012-05-10 10:18:07 -0500 327)
c04fecb4d9f77 (David Teigland 2012-05-10 10:18:07 -0500 328) /* dlm_master_lookup() results */
c04fecb4d9f77 (David Teigland 2012-05-10 10:18:07 -0500 329)
c04fecb4d9f77 (David Teigland 2012-05-10 10:18:07 -0500 330) #define DLM_LU_MATCH 1
c04fecb4d9f77 (David Teigland 2012-05-10 10:18:07 -0500 331) #define DLM_LU_ADD 2
c04fecb4d9f77 (David Teigland 2012-05-10 10:18:07 -0500 332)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 333) /* find_rsb() flags */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 334)
c04fecb4d9f77 (David Teigland 2012-05-10 10:18:07 -0500 335) #define R_REQUEST 0x00000001
c04fecb4d9f77 (David Teigland 2012-05-10 10:18:07 -0500 336) #define R_RECEIVE_REQUEST 0x00000002
c04fecb4d9f77 (David Teigland 2012-05-10 10:18:07 -0500 337) #define R_RECEIVE_RECOVER 0x00000004
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 338)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 339) /* rsb_flags */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 340)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 341) enum rsb_flags {
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 342) RSB_MASTER_UNCERTAIN,
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 343) RSB_VALNOTVALID,
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 344) RSB_VALNOTVALID_PREV,
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 345) RSB_NEW_MASTER,
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 346) RSB_NEW_MASTER2,
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 347) RSB_RECOVER_CONVERT,
4875647a08e35 (David Teigland 2012-04-26 15:54:29 -0500 348) RSB_RECOVER_GRANT,
da8c66638ae68 (David Teigland 2012-11-15 15:01:51 -0600 349) RSB_RECOVER_LVB_INVAL,
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 350) };
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 351)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 352) static inline void rsb_set_flag(struct dlm_rsb *r, enum rsb_flags flag)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 353) {
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 354) __set_bit(flag, &r->res_flags);
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 355) }
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 356)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 357) static inline void rsb_clear_flag(struct dlm_rsb *r, enum rsb_flags flag)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 358) {
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 359) __clear_bit(flag, &r->res_flags);
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 360) }
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 361)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 362) static inline int rsb_flag(struct dlm_rsb *r, enum rsb_flags flag)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 363) {
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 364) return test_bit(flag, &r->res_flags);
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 365) }
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 366)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 367)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 368) /* dlm_header is first element of all structs sent between nodes */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 369)
38aa8b0c59c35 (David Teigland 2006-12-13 10:37:16 -0600 370) #define DLM_HEADER_MAJOR 0x00030000
757a427196354 (David Teigland 2011-10-20 13:26:28 -0500 371) #define DLM_HEADER_MINOR 0x00000001
757a427196354 (David Teigland 2011-10-20 13:26:28 -0500 372)
757a427196354 (David Teigland 2011-10-20 13:26:28 -0500 373) #define DLM_HEADER_SLOTS 0x00000001
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 374)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 375) #define DLM_MSG 1
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 376) #define DLM_RCOM 2
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 377)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 378) struct dlm_header {
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 379) uint32_t h_version;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 380) uint32_t h_lockspace;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 381) uint32_t h_nodeid; /* nodeid of sender */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 382) uint16_t h_length;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 383) uint8_t h_cmd; /* DLM_MSG, DLM_RCOM */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 384) uint8_t h_pad;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 385) };
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 386)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 387)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 388) #define DLM_MSG_REQUEST 1
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 389) #define DLM_MSG_CONVERT 2
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 390) #define DLM_MSG_UNLOCK 3
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 391) #define DLM_MSG_CANCEL 4
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 392) #define DLM_MSG_REQUEST_REPLY 5
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 393) #define DLM_MSG_CONVERT_REPLY 6
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 394) #define DLM_MSG_UNLOCK_REPLY 7
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 395) #define DLM_MSG_CANCEL_REPLY 8
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 396) #define DLM_MSG_GRANT 9
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 397) #define DLM_MSG_BAST 10
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 398) #define DLM_MSG_LOOKUP 11
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 399) #define DLM_MSG_REMOVE 12
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 400) #define DLM_MSG_LOOKUP_REPLY 13
8499137d4ef18 (David Teigland 2007-03-30 15:02:40 -0500 401) #define DLM_MSG_PURGE 14
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 402)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 403) struct dlm_message {
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 404) struct dlm_header m_header;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 405) uint32_t m_type; /* DLM_MSG_ */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 406) uint32_t m_nodeid;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 407) uint32_t m_pid;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 408) uint32_t m_lkid; /* lkid on sender */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 409) uint32_t m_remid; /* lkid on receiver */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 410) uint32_t m_parent_lkid;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 411) uint32_t m_parent_remid;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 412) uint32_t m_exflags;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 413) uint32_t m_sbflags;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 414) uint32_t m_flags;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 415) uint32_t m_lvbseq;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 416) uint32_t m_hash;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 417) int m_status;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 418) int m_grmode;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 419) int m_rqmode;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 420) int m_bastmode;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 421) int m_asts;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 422) int m_result; /* 0 or -EXXX */
a4e439a6f628a (Gustavo A. R. Silva 2020-03-09 10:56:08 -0500 423) char m_extra[]; /* name or lvb */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 424) };
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 425)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 426)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 427) #define DLM_RS_NODES 0x00000001
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 428) #define DLM_RS_NODES_ALL 0x00000002
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 429) #define DLM_RS_DIR 0x00000004
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 430) #define DLM_RS_DIR_ALL 0x00000008
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 431) #define DLM_RS_LOCKS 0x00000010
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 432) #define DLM_RS_LOCKS_ALL 0x00000020
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 433) #define DLM_RS_DONE 0x00000040
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 434) #define DLM_RS_DONE_ALL 0x00000080
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 435)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 436) #define DLM_RCOM_STATUS 1
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 437) #define DLM_RCOM_NAMES 2
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 438) #define DLM_RCOM_LOOKUP 3
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 439) #define DLM_RCOM_LOCK 4
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 440) #define DLM_RCOM_STATUS_REPLY 5
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 441) #define DLM_RCOM_NAMES_REPLY 6
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 442) #define DLM_RCOM_LOOKUP_REPLY 7
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 443) #define DLM_RCOM_LOCK_REPLY 8
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 444)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 445) struct dlm_rcom {
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 446) struct dlm_header rc_header;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 447) uint32_t rc_type; /* DLM_RCOM_ */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 448) int rc_result; /* multi-purpose */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 449) uint64_t rc_id; /* match reply with request */
38aa8b0c59c35 (David Teigland 2006-12-13 10:37:16 -0600 450) uint64_t rc_seq; /* sender's ls_recover_seq */
38aa8b0c59c35 (David Teigland 2006-12-13 10:37:16 -0600 451) uint64_t rc_seq_reply; /* remote ls_recover_seq */
a4e439a6f628a (Gustavo A. R. Silva 2020-03-09 10:56:08 -0500 452) char rc_buf[];
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 453) };
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 454)
eef7d739c218c (Al Viro 2008-01-25 00:58:46 -0500 455) union dlm_packet {
eef7d739c218c (Al Viro 2008-01-25 00:58:46 -0500 456) struct dlm_header header; /* common to other two */
eef7d739c218c (Al Viro 2008-01-25 00:58:46 -0500 457) struct dlm_message message;
eef7d739c218c (Al Viro 2008-01-25 00:58:46 -0500 458) struct dlm_rcom rcom;
eef7d739c218c (Al Viro 2008-01-25 00:58:46 -0500 459) };
eef7d739c218c (Al Viro 2008-01-25 00:58:46 -0500 460)
757a427196354 (David Teigland 2011-10-20 13:26:28 -0500 461) #define DLM_RSF_NEED_SLOTS 0x00000001
757a427196354 (David Teigland 2011-10-20 13:26:28 -0500 462)
757a427196354 (David Teigland 2011-10-20 13:26:28 -0500 463) /* RCOM_STATUS data */
757a427196354 (David Teigland 2011-10-20 13:26:28 -0500 464) struct rcom_status {
757a427196354 (David Teigland 2011-10-20 13:26:28 -0500 465) __le32 rs_flags;
757a427196354 (David Teigland 2011-10-20 13:26:28 -0500 466) __le32 rs_unused1;
757a427196354 (David Teigland 2011-10-20 13:26:28 -0500 467) __le64 rs_unused2;
757a427196354 (David Teigland 2011-10-20 13:26:28 -0500 468) };
757a427196354 (David Teigland 2011-10-20 13:26:28 -0500 469)
757a427196354 (David Teigland 2011-10-20 13:26:28 -0500 470) /* RCOM_STATUS_REPLY data */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 471) struct rcom_config {
93ff2971e99c9 (Al Viro 2008-01-25 02:34:00 -0500 472) __le32 rf_lvblen;
93ff2971e99c9 (Al Viro 2008-01-25 02:34:00 -0500 473) __le32 rf_lsflags;
757a427196354 (David Teigland 2011-10-20 13:26:28 -0500 474)
757a427196354 (David Teigland 2011-10-20 13:26:28 -0500 475) /* DLM_HEADER_SLOTS adds: */
757a427196354 (David Teigland 2011-10-20 13:26:28 -0500 476) __le32 rf_flags;
757a427196354 (David Teigland 2011-10-20 13:26:28 -0500 477) __le16 rf_our_slot;
757a427196354 (David Teigland 2011-10-20 13:26:28 -0500 478) __le16 rf_num_slots;
757a427196354 (David Teigland 2011-10-20 13:26:28 -0500 479) __le32 rf_generation;
757a427196354 (David Teigland 2011-10-20 13:26:28 -0500 480) __le32 rf_unused1;
757a427196354 (David Teigland 2011-10-20 13:26:28 -0500 481) __le64 rf_unused2;
757a427196354 (David Teigland 2011-10-20 13:26:28 -0500 482) };
757a427196354 (David Teigland 2011-10-20 13:26:28 -0500 483)
757a427196354 (David Teigland 2011-10-20 13:26:28 -0500 484) struct rcom_slot {
757a427196354 (David Teigland 2011-10-20 13:26:28 -0500 485) __le32 ro_nodeid;
757a427196354 (David Teigland 2011-10-20 13:26:28 -0500 486) __le16 ro_slot;
757a427196354 (David Teigland 2011-10-20 13:26:28 -0500 487) __le16 ro_unused1;
757a427196354 (David Teigland 2011-10-20 13:26:28 -0500 488) __le64 ro_unused2;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 489) };
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 490)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 491) struct rcom_lock {
163a1859ec6c4 (Al Viro 2008-01-25 02:08:26 -0500 492) __le32 rl_ownpid;
163a1859ec6c4 (Al Viro 2008-01-25 02:08:26 -0500 493) __le32 rl_lkid;
163a1859ec6c4 (Al Viro 2008-01-25 02:08:26 -0500 494) __le32 rl_remid;
163a1859ec6c4 (Al Viro 2008-01-25 02:08:26 -0500 495) __le32 rl_parent_lkid;
163a1859ec6c4 (Al Viro 2008-01-25 02:08:26 -0500 496) __le32 rl_parent_remid;
163a1859ec6c4 (Al Viro 2008-01-25 02:08:26 -0500 497) __le32 rl_exflags;
163a1859ec6c4 (Al Viro 2008-01-25 02:08:26 -0500 498) __le32 rl_flags;
163a1859ec6c4 (Al Viro 2008-01-25 02:08:26 -0500 499) __le32 rl_lvbseq;
163a1859ec6c4 (Al Viro 2008-01-25 02:08:26 -0500 500) __le32 rl_result;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 501) int8_t rl_rqmode;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 502) int8_t rl_grmode;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 503) int8_t rl_status;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 504) int8_t rl_asts;
163a1859ec6c4 (Al Viro 2008-01-25 02:08:26 -0500 505) __le16 rl_wait_type;
163a1859ec6c4 (Al Viro 2008-01-25 02:08:26 -0500 506) __le16 rl_namelen;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 507) char rl_name[DLM_RESNAME_MAXLEN];
a4e439a6f628a (Gustavo A. R. Silva 2020-03-09 10:56:08 -0500 508) char rl_lvb[];
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 509) };
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 510)
05c32f47bfae7 (David Teigland 2012-06-14 12:17:32 -0500 511) /*
05c32f47bfae7 (David Teigland 2012-06-14 12:17:32 -0500 512) * The max number of resources per rsbtbl bucket that shrink will attempt
05c32f47bfae7 (David Teigland 2012-06-14 12:17:32 -0500 513) * to remove in each iteration.
05c32f47bfae7 (David Teigland 2012-06-14 12:17:32 -0500 514) */
05c32f47bfae7 (David Teigland 2012-06-14 12:17:32 -0500 515)
05c32f47bfae7 (David Teigland 2012-06-14 12:17:32 -0500 516) #define DLM_REMOVE_NAMES_MAX 8
05c32f47bfae7 (David Teigland 2012-06-14 12:17:32 -0500 517)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 518) struct dlm_ls {
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 519) struct list_head ls_list; /* list of lockspaces */
597d0cae0f99f (David Teigland 2006-07-12 16:44:04 -0500 520) dlm_lockspace_t *ls_local_handle;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 521) uint32_t ls_global_id; /* global unique lockspace ID */
757a427196354 (David Teigland 2011-10-20 13:26:28 -0500 522) uint32_t ls_generation;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 523) uint32_t ls_exflags;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 524) int ls_lvblen;
0f8e0d9a31740 (David Teigland 2008-08-06 13:30:24 -0500 525) int ls_count; /* refcount of processes in
0f8e0d9a31740 (David Teigland 2008-08-06 13:30:24 -0500 526) the dlm using this ls */
0f8e0d9a31740 (David Teigland 2008-08-06 13:30:24 -0500 527) int ls_create_count; /* create/release refcount */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 528) unsigned long ls_flags; /* LSFL_ */
c1dcf65ffc579 (David Teigland 2008-08-18 14:03:25 -0500 529) unsigned long ls_scan_time;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 530) struct kobject ls_kobj;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 531)
3d6aa675fff9e (David Teigland 2011-07-06 17:00:54 -0500 532) struct idr ls_lkbidr;
3d6aa675fff9e (David Teigland 2011-07-06 17:00:54 -0500 533) spinlock_t ls_lkbidr_spin;
3d6aa675fff9e (David Teigland 2011-07-06 17:00:54 -0500 534)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 535) struct dlm_rsbtable *ls_rsbtbl;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 536) uint32_t ls_rsbtbl_size;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 537)
901359256b266 (David Teigland 2006-01-20 08:47:07 +0000 538) struct mutex ls_waiters_mutex;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 539) struct list_head ls_waiters; /* lkbs needing a reply */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 540)
ef0c2bb05f40f (David Teigland 2007-03-28 09:56:46 -0500 541) struct mutex ls_orphans_mutex;
ef0c2bb05f40f (David Teigland 2007-03-28 09:56:46 -0500 542) struct list_head ls_orphans;
ef0c2bb05f40f (David Teigland 2007-03-28 09:56:46 -0500 543)
3ae1acf93a215 (David Teigland 2007-05-18 08:59:31 -0500 544) struct mutex ls_timeout_mutex;
3ae1acf93a215 (David Teigland 2007-05-18 08:59:31 -0500 545) struct list_head ls_timeout;
3ae1acf93a215 (David Teigland 2007-05-18 08:59:31 -0500 546)
3881ac04ebf94 (David Teigland 2011-07-07 14:05:03 -0500 547) spinlock_t ls_new_rsb_spin;
3881ac04ebf94 (David Teigland 2011-07-07 14:05:03 -0500 548) int ls_new_rsb_count;
3881ac04ebf94 (David Teigland 2011-07-07 14:05:03 -0500 549) struct list_head ls_new_rsb; /* new rsb structs */
3881ac04ebf94 (David Teigland 2011-07-07 14:05:03 -0500 550)
05c32f47bfae7 (David Teigland 2012-06-14 12:17:32 -0500 551) spinlock_t ls_remove_spin;
05c32f47bfae7 (David Teigland 2012-06-14 12:17:32 -0500 552) char ls_remove_name[DLM_RESNAME_MAXLEN+1];
05c32f47bfae7 (David Teigland 2012-06-14 12:17:32 -0500 553) char *ls_remove_names[DLM_REMOVE_NAMES_MAX];
05c32f47bfae7 (David Teigland 2012-06-14 12:17:32 -0500 554) int ls_remove_len;
05c32f47bfae7 (David Teigland 2012-06-14 12:17:32 -0500 555) int ls_remove_lens[DLM_REMOVE_NAMES_MAX];
05c32f47bfae7 (David Teigland 2012-06-14 12:17:32 -0500 556)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 557) struct list_head ls_nodes; /* current nodes in ls */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 558) struct list_head ls_nodes_gone; /* dead node list, recovery */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 559) int ls_num_nodes; /* number of nodes in ls */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 560) int ls_low_nodeid;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 561) int ls_total_weight;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 562) int *ls_node_array;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 563)
757a427196354 (David Teigland 2011-10-20 13:26:28 -0500 564) int ls_slot;
757a427196354 (David Teigland 2011-10-20 13:26:28 -0500 565) int ls_num_slots;
757a427196354 (David Teigland 2011-10-20 13:26:28 -0500 566) int ls_slots_size;
757a427196354 (David Teigland 2011-10-20 13:26:28 -0500 567) struct dlm_slot *ls_slots;
757a427196354 (David Teigland 2011-10-20 13:26:28 -0500 568)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 569) struct dlm_rsb ls_stub_rsb; /* for returning errors */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 570) struct dlm_lkb ls_stub_lkb; /* for returning errors */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 571) struct dlm_message ls_stub_ms; /* for faking a reply */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 572)
5de6319b18393 (David Teigland 2006-07-25 13:44:31 -0500 573) struct dentry *ls_debug_rsb_dentry; /* debugfs */
5de6319b18393 (David Teigland 2006-07-25 13:44:31 -0500 574) struct dentry *ls_debug_waiters_dentry; /* debugfs */
ac90a25525009 (David Teigland 2007-07-06 09:47:08 -0500 575) struct dentry *ls_debug_locks_dentry; /* debugfs */
d022509d1c54b (David Teigland 2008-12-16 14:53:23 -0600 576) struct dentry *ls_debug_all_dentry; /* debugfs */
c04fecb4d9f77 (David Teigland 2012-05-10 10:18:07 -0500 577) struct dentry *ls_debug_toss_dentry; /* debugfs */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 578)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 579) wait_queue_head_t ls_uevent_wait; /* user part of join/leave */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 580) int ls_uevent_result;
8b0e7b2cf35aa (David Teigland 2007-05-18 09:03:35 -0500 581) struct completion ls_members_done;
8b0e7b2cf35aa (David Teigland 2007-05-18 09:03:35 -0500 582) int ls_members_result;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 583)
597d0cae0f99f (David Teigland 2006-07-12 16:44:04 -0500 584) struct miscdevice ls_device;
597d0cae0f99f (David Teigland 2006-07-12 16:44:04 -0500 585)
23e8e1aaacb10 (David Teigland 2011-04-05 13:16:24 -0500 586) struct workqueue_struct *ls_callback_wq;
23e8e1aaacb10 (David Teigland 2011-04-05 13:16:24 -0500 587)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 588) /* recovery related */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 589)
23e8e1aaacb10 (David Teigland 2011-04-05 13:16:24 -0500 590) struct mutex ls_cb_mutex;
23e8e1aaacb10 (David Teigland 2011-04-05 13:16:24 -0500 591) struct list_head ls_cb_delay; /* save for queue_work later */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 592) struct timer_list ls_timer;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 593) struct task_struct *ls_recoverd_task;
901359256b266 (David Teigland 2006-01-20 08:47:07 +0000 594) struct mutex ls_recoverd_active;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 595) spinlock_t ls_recover_lock;
3ae1acf93a215 (David Teigland 2007-05-18 08:59:31 -0500 596) unsigned long ls_recover_begin; /* jiffies timestamp */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 597) uint32_t ls_recover_status; /* DLM_RS_ */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 598) uint64_t ls_recover_seq;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 599) struct dlm_recover *ls_recover_args;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 600) struct rw_semaphore ls_in_recovery; /* block local requests */
c36258b5925e6 (David Teigland 2007-09-27 15:53:38 -0500 601) struct rw_semaphore ls_recv_active; /* block dlm_recv */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 602) struct list_head ls_requestqueue;/* queue remote requests */
901359256b266 (David Teigland 2006-01-20 08:47:07 +0000 603) struct mutex ls_requestqueue_mutex;
4007685c6e6b5 (Al Viro 2008-01-25 03:01:51 -0500 604) struct dlm_rcom *ls_recover_buf;
faa0f2677287a (David Teigland 2006-08-08 17:08:42 -0500 605) int ls_recover_nodeid; /* for debugging */
c04fecb4d9f77 (David Teigland 2012-05-10 10:18:07 -0500 606) unsigned int ls_recover_dir_sent_res; /* for log info */
c04fecb4d9f77 (David Teigland 2012-05-10 10:18:07 -0500 607) unsigned int ls_recover_dir_sent_msg; /* for log info */
4875647a08e35 (David Teigland 2012-04-26 15:54:29 -0500 608) unsigned int ls_recover_locks_in; /* for log info */
4a99c3d9d6663 (David Teigland 2006-08-09 11:20:15 -0500 609) uint64_t ls_rcom_seq;
98f176fb32f33 (David Teigland 2006-11-27 13:19:28 -0600 610) spinlock_t ls_rcom_spin;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 611) struct list_head ls_recover_list;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 612) spinlock_t ls_recover_list_lock;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 613) int ls_recover_list_count;
1d7c484eeb167 (David Teigland 2012-05-15 16:07:49 -0500 614) struct idr ls_recover_idr;
1d7c484eeb167 (David Teigland 2012-05-15 16:07:49 -0500 615) spinlock_t ls_recover_idr_lock;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 616) wait_queue_head_t ls_wait_general;
475f230c6072f (David Teigland 2012-08-02 11:08:21 -0500 617) wait_queue_head_t ls_recover_lock_wait;
597d0cae0f99f (David Teigland 2006-07-12 16:44:04 -0500 618) struct mutex ls_clear_proc_locks;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 619)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 620) struct list_head ls_root_list; /* root resources */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 621) struct rw_semaphore ls_root_sem; /* protect root_list */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 622)
60f98d1839376 (David Teigland 2011-11-02 14:30:58 -0500 623) const struct dlm_lockspace_ops *ls_ops;
60f98d1839376 (David Teigland 2011-11-02 14:30:58 -0500 624) void *ls_ops_arg;
60f98d1839376 (David Teigland 2011-11-02 14:30:58 -0500 625)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 626) int ls_namelen;
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 627) char ls_name[1];
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 628) };
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 629)
475f230c6072f (David Teigland 2012-08-02 11:08:21 -0500 630) /*
475f230c6072f (David Teigland 2012-08-02 11:08:21 -0500 631) * LSFL_RECOVER_STOP - dlm_ls_stop() sets this to tell dlm recovery routines
475f230c6072f (David Teigland 2012-08-02 11:08:21 -0500 632) * that they should abort what they're doing so new recovery can be started.
475f230c6072f (David Teigland 2012-08-02 11:08:21 -0500 633) *
475f230c6072f (David Teigland 2012-08-02 11:08:21 -0500 634) * LSFL_RECOVER_DOWN - dlm_ls_stop() sets this to tell dlm_recoverd that it
475f230c6072f (David Teigland 2012-08-02 11:08:21 -0500 635) * should do down_write() on the in_recovery rw_semaphore. (doing down_write
475f230c6072f (David Teigland 2012-08-02 11:08:21 -0500 636) * within dlm_ls_stop causes complaints about the lock acquired/released
475f230c6072f (David Teigland 2012-08-02 11:08:21 -0500 637) * in different contexts.)
475f230c6072f (David Teigland 2012-08-02 11:08:21 -0500 638) *
475f230c6072f (David Teigland 2012-08-02 11:08:21 -0500 639) * LSFL_RECOVER_LOCK - dlm_recoverd holds the in_recovery rw_semaphore.
475f230c6072f (David Teigland 2012-08-02 11:08:21 -0500 640) * It sets this after it is done with down_write() on the in_recovery
475f230c6072f (David Teigland 2012-08-02 11:08:21 -0500 641) * rw_semaphore and clears it after it has released the rw_semaphore.
475f230c6072f (David Teigland 2012-08-02 11:08:21 -0500 642) *
475f230c6072f (David Teigland 2012-08-02 11:08:21 -0500 643) * LSFL_RECOVER_WORK - dlm_ls_start() sets this to tell dlm_recoverd that it
475f230c6072f (David Teigland 2012-08-02 11:08:21 -0500 644) * should begin recovery of the lockspace.
475f230c6072f (David Teigland 2012-08-02 11:08:21 -0500 645) *
475f230c6072f (David Teigland 2012-08-02 11:08:21 -0500 646) * LSFL_RUNNING - set when normal locking activity is enabled.
475f230c6072f (David Teigland 2012-08-02 11:08:21 -0500 647) * dlm_ls_stop() clears this to tell dlm locking routines that they should
475f230c6072f (David Teigland 2012-08-02 11:08:21 -0500 648) * quit what they are doing so recovery can run. dlm_recoverd sets
475f230c6072f (David Teigland 2012-08-02 11:08:21 -0500 649) * this after recovery is finished.
475f230c6072f (David Teigland 2012-08-02 11:08:21 -0500 650) */
475f230c6072f (David Teigland 2012-08-02 11:08:21 -0500 651)
475f230c6072f (David Teigland 2012-08-02 11:08:21 -0500 652) #define LSFL_RECOVER_STOP 0
475f230c6072f (David Teigland 2012-08-02 11:08:21 -0500 653) #define LSFL_RECOVER_DOWN 1
475f230c6072f (David Teigland 2012-08-02 11:08:21 -0500 654) #define LSFL_RECOVER_LOCK 2
475f230c6072f (David Teigland 2012-08-02 11:08:21 -0500 655) #define LSFL_RECOVER_WORK 3
475f230c6072f (David Teigland 2012-08-02 11:08:21 -0500 656) #define LSFL_RUNNING 4
475f230c6072f (David Teigland 2012-08-02 11:08:21 -0500 657)
475f230c6072f (David Teigland 2012-08-02 11:08:21 -0500 658) #define LSFL_RCOM_READY 5
475f230c6072f (David Teigland 2012-08-02 11:08:21 -0500 659) #define LSFL_RCOM_WAIT 6
475f230c6072f (David Teigland 2012-08-02 11:08:21 -0500 660) #define LSFL_UEVENT_WAIT 7
475f230c6072f (David Teigland 2012-08-02 11:08:21 -0500 661) #define LSFL_TIMEWARN 8
475f230c6072f (David Teigland 2012-08-02 11:08:21 -0500 662) #define LSFL_CB_DELAY 9
475f230c6072f (David Teigland 2012-08-02 11:08:21 -0500 663) #define LSFL_NODIR 10
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 664)
597d0cae0f99f (David Teigland 2006-07-12 16:44:04 -0500 665) /* much of this is just saving user space pointers associated with the
597d0cae0f99f (David Teigland 2006-07-12 16:44:04 -0500 666) lock that we pass back to the user lib with an ast */
597d0cae0f99f (David Teigland 2006-07-12 16:44:04 -0500 667)
597d0cae0f99f (David Teigland 2006-07-12 16:44:04 -0500 668) struct dlm_user_args {
597d0cae0f99f (David Teigland 2006-07-12 16:44:04 -0500 669) struct dlm_user_proc *proc; /* each process that opens the lockspace
597d0cae0f99f (David Teigland 2006-07-12 16:44:04 -0500 670) device has private data
597d0cae0f99f (David Teigland 2006-07-12 16:44:04 -0500 671) (dlm_user_proc) on the struct file,
597d0cae0f99f (David Teigland 2006-07-12 16:44:04 -0500 672) the process's locks point back to it*/
597d0cae0f99f (David Teigland 2006-07-12 16:44:04 -0500 673) struct dlm_lksb lksb;
597d0cae0f99f (David Teigland 2006-07-12 16:44:04 -0500 674) struct dlm_lksb __user *user_lksb;
597d0cae0f99f (David Teigland 2006-07-12 16:44:04 -0500 675) void __user *castparam;
597d0cae0f99f (David Teigland 2006-07-12 16:44:04 -0500 676) void __user *castaddr;
597d0cae0f99f (David Teigland 2006-07-12 16:44:04 -0500 677) void __user *bastparam;
597d0cae0f99f (David Teigland 2006-07-12 16:44:04 -0500 678) void __user *bastaddr;
d7db923ea4990 (David Teigland 2007-05-18 09:00:32 -0500 679) uint64_t xid;
597d0cae0f99f (David Teigland 2006-07-12 16:44:04 -0500 680) };
597d0cae0f99f (David Teigland 2006-07-12 16:44:04 -0500 681)
597d0cae0f99f (David Teigland 2006-07-12 16:44:04 -0500 682) #define DLM_PROC_FLAGS_CLOSING 1
597d0cae0f99f (David Teigland 2006-07-12 16:44:04 -0500 683) #define DLM_PROC_FLAGS_COMPAT 2
597d0cae0f99f (David Teigland 2006-07-12 16:44:04 -0500 684)
597d0cae0f99f (David Teigland 2006-07-12 16:44:04 -0500 685) /* locks list is kept so we can remove all a process's locks when it
597d0cae0f99f (David Teigland 2006-07-12 16:44:04 -0500 686) exits (or orphan those that are persistent) */
597d0cae0f99f (David Teigland 2006-07-12 16:44:04 -0500 687)
597d0cae0f99f (David Teigland 2006-07-12 16:44:04 -0500 688) struct dlm_user_proc {
597d0cae0f99f (David Teigland 2006-07-12 16:44:04 -0500 689) dlm_lockspace_t *lockspace;
597d0cae0f99f (David Teigland 2006-07-12 16:44:04 -0500 690) unsigned long flags; /* DLM_PROC_FLAGS */
597d0cae0f99f (David Teigland 2006-07-12 16:44:04 -0500 691) struct list_head asts;
597d0cae0f99f (David Teigland 2006-07-12 16:44:04 -0500 692) spinlock_t asts_spin;
597d0cae0f99f (David Teigland 2006-07-12 16:44:04 -0500 693) struct list_head locks;
597d0cae0f99f (David Teigland 2006-07-12 16:44:04 -0500 694) spinlock_t locks_spin;
a1bc86e6bddd3 (David Teigland 2007-01-15 10:34:52 -0600 695) struct list_head unlocking;
597d0cae0f99f (David Teigland 2006-07-12 16:44:04 -0500 696) wait_queue_head_t wait;
597d0cae0f99f (David Teigland 2006-07-12 16:44:04 -0500 697) };
597d0cae0f99f (David Teigland 2006-07-12 16:44:04 -0500 698)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 699) static inline int dlm_locking_stopped(struct dlm_ls *ls)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 700) {
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 701) return !test_bit(LSFL_RUNNING, &ls->ls_flags);
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 702) }
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 703)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 704) static inline int dlm_recovery_stopped(struct dlm_ls *ls)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 705) {
475f230c6072f (David Teigland 2012-08-02 11:08:21 -0500 706) return test_bit(LSFL_RECOVER_STOP, &ls->ls_flags);
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 707) }
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 708)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 709) static inline int dlm_no_directory(struct dlm_ls *ls)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 710) {
4875647a08e35 (David Teigland 2012-04-26 15:54:29 -0500 711) return test_bit(LSFL_NODIR, &ls->ls_flags);
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 712) }
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 713)
e028398da7615 (Adrian Bunk 2007-11-03 01:04:30 +0100 714) int dlm_netlink_init(void);
e028398da7615 (Adrian Bunk 2007-11-03 01:04:30 +0100 715) void dlm_netlink_exit(void);
e028398da7615 (Adrian Bunk 2007-11-03 01:04:30 +0100 716) void dlm_timeout_warn(struct dlm_lkb *lkb);
2402211a83892 (David Teigland 2008-03-14 15:09:15 -0500 717) int dlm_plock_init(void);
2402211a83892 (David Teigland 2008-03-14 15:09:15 -0500 718) void dlm_plock_exit(void);
e028398da7615 (Adrian Bunk 2007-11-03 01:04:30 +0100 719)
e028398da7615 (Adrian Bunk 2007-11-03 01:04:30 +0100 720) #ifdef CONFIG_DLM_DEBUG
a48f9721e6db7 (Greg Kroah-Hartman 2019-06-12 17:25:36 +0200 721) void dlm_register_debugfs(void);
e028398da7615 (Adrian Bunk 2007-11-03 01:04:30 +0100 722) void dlm_unregister_debugfs(void);
a48f9721e6db7 (Greg Kroah-Hartman 2019-06-12 17:25:36 +0200 723) void dlm_create_debug_file(struct dlm_ls *ls);
e028398da7615 (Adrian Bunk 2007-11-03 01:04:30 +0100 724) void dlm_delete_debug_file(struct dlm_ls *ls);
e028398da7615 (Adrian Bunk 2007-11-03 01:04:30 +0100 725) #else
a48f9721e6db7 (Greg Kroah-Hartman 2019-06-12 17:25:36 +0200 726) static inline void dlm_register_debugfs(void) { }
e028398da7615 (Adrian Bunk 2007-11-03 01:04:30 +0100 727) static inline void dlm_unregister_debugfs(void) { }
a48f9721e6db7 (Greg Kroah-Hartman 2019-06-12 17:25:36 +0200 728) static inline void dlm_create_debug_file(struct dlm_ls *ls) { }
e028398da7615 (Adrian Bunk 2007-11-03 01:04:30 +0100 729) static inline void dlm_delete_debug_file(struct dlm_ls *ls) { }
e028398da7615 (Adrian Bunk 2007-11-03 01:04:30 +0100 730) #endif
e028398da7615 (Adrian Bunk 2007-11-03 01:04:30 +0100 731)
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 732) #endif /* __DLM_INTERNAL_DOT_H__ */
e7fd41792fc0e (David Teigland 2006-01-18 09:30:29 +0000 733)
VisionFive2 Linux kernel
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