Commit 7d8a804c authored by Linus Torvalds's avatar Linus Torvalds
Browse files

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/dlm

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/teigland/dlm:
  dlm: fs/dlm/ast.c: fix warning
  dlm: add new debugfs entry
  dlm: add time stamp of blocking callback
  dlm: change lock time stamping
  dlm: improve how bast mode handling
  dlm: remove extra blocking callback check
  dlm: replace schedule with cond_resched
  dlm: remove kmap/kunmap
  dlm: trivial annotation of be16 value
  dlm: fix up memory allocation flags
parents c58bd34d 722d7421
......@@ -2,7 +2,7 @@
*******************************************************************************
**
** Copyright (C) Sistina Software, Inc. 1997-2003 All rights reserved.
** Copyright (C) 2004-2005 Red Hat, Inc. All rights reserved.
** Copyright (C) 2004-2008 Red Hat, Inc. All rights reserved.
**
** This copyrighted material is made available to anyone wishing to use,
** modify, copy, or redistribute it subject to the terms and conditions
......@@ -33,10 +33,10 @@ void dlm_del_ast(struct dlm_lkb *lkb)
spin_unlock(&ast_queue_lock);
}
void dlm_add_ast(struct dlm_lkb *lkb, int type)
void dlm_add_ast(struct dlm_lkb *lkb, int type, int bastmode)
{
if (lkb->lkb_flags & DLM_IFL_USER) {
dlm_user_add_ast(lkb, type);
dlm_user_add_ast(lkb, type, bastmode);
return;
}
......@@ -46,6 +46,8 @@ void dlm_add_ast(struct dlm_lkb *lkb, int type)
list_add_tail(&lkb->lkb_astqueue, &ast_queue);
}
lkb->lkb_ast_type |= type;
if (bastmode)
lkb->lkb_bastmode = bastmode;
spin_unlock(&ast_queue_lock);
set_bit(WAKE_ASTS, &astd_wakeflags);
......@@ -59,50 +61,40 @@ static void process_asts(void)
struct dlm_lkb *lkb;
void (*cast) (void *astparam);
void (*bast) (void *astparam, int mode);
int type = 0, found, bmode;
for (;;) {
found = 0;
spin_lock(&ast_queue_lock);
list_for_each_entry(lkb, &ast_queue, lkb_astqueue) {
r = lkb->lkb_resource;
ls = r->res_ls;
if (dlm_locking_stopped(ls))
continue;
list_del(&lkb->lkb_astqueue);
type = lkb->lkb_ast_type;
lkb->lkb_ast_type = 0;
found = 1;
break;
}
spin_unlock(&ast_queue_lock);
int type = 0, bastmode;
repeat:
spin_lock(&ast_queue_lock);
list_for_each_entry(lkb, &ast_queue, lkb_astqueue) {
r = lkb->lkb_resource;
ls = r->res_ls;
if (dlm_locking_stopped(ls))
continue;
if (!found)
break;
list_del(&lkb->lkb_astqueue);
type = lkb->lkb_ast_type;
lkb->lkb_ast_type = 0;
bastmode = lkb->lkb_bastmode;
spin_unlock(&ast_queue_lock);
cast = lkb->lkb_astfn;
bast = lkb->lkb_bastfn;
bmode = lkb->lkb_bastmode;
if ((type & AST_COMP) && cast)
cast(lkb->lkb_astparam);
/* FIXME: Is it safe to look at lkb_grmode here
without doing a lock_rsb() ?
Look at other checks in v1 to avoid basts. */
if ((type & AST_BAST) && bast)
if (!dlm_modes_compat(lkb->lkb_grmode, bmode))
bast(lkb->lkb_astparam, bmode);
bast(lkb->lkb_astparam, bastmode);
/* this removes the reference added by dlm_add_ast
and may result in the lkb being freed */
dlm_put_lkb(lkb);
schedule();
cond_resched();
goto repeat;
}
spin_unlock(&ast_queue_lock);
}
static inline int no_asts(void)
......
/******************************************************************************
*******************************************************************************
**
** Copyright (C) 2005 Red Hat, Inc. All rights reserved.
** Copyright (C) 2005-2008 Red Hat, Inc. All rights reserved.
**
** This copyrighted material is made available to anyone wishing to use,
** modify, copy, or redistribute it subject to the terms and conditions
......@@ -13,7 +13,7 @@
#ifndef __ASTD_DOT_H__
#define __ASTD_DOT_H__
void dlm_add_ast(struct dlm_lkb *lkb, int type);
void dlm_add_ast(struct dlm_lkb *lkb, int type, int bastmode);
void dlm_del_ast(struct dlm_lkb *lkb);
void dlm_astd_wake(void);
......
/******************************************************************************
*******************************************************************************
**
** Copyright (C) 2005 Red Hat, Inc. All rights reserved.
** Copyright (C) 2005-2008 Red Hat, Inc. All rights reserved.
**
** This copyrighted material is made available to anyone wishing to use,
** modify, copy, or redistribute it subject to the terms and conditions
......@@ -27,7 +27,7 @@ static struct dentry *dlm_root;
struct rsb_iter {
int entry;
int locks;
int format;
int header;
struct dlm_ls *ls;
struct list_head *next;
......@@ -60,8 +60,8 @@ static char *print_lockmode(int mode)
}
}
static void print_resource_lock(struct seq_file *s, struct dlm_lkb *lkb,
struct dlm_rsb *res)
static void print_format1_lock(struct seq_file *s, struct dlm_lkb *lkb,
struct dlm_rsb *res)
{
seq_printf(s, "%08x %s", lkb->lkb_id, print_lockmode(lkb->lkb_grmode));
......@@ -83,7 +83,7 @@ static void print_resource_lock(struct seq_file *s, struct dlm_lkb *lkb,
seq_printf(s, "\n");
}
static int print_resource(struct dlm_rsb *res, struct seq_file *s)
static int print_format1(struct dlm_rsb *res, struct seq_file *s)
{
struct dlm_lkb *lkb;
int i, lvblen = res->res_ls->ls_lvblen, recover_list, root_list;
......@@ -134,15 +134,15 @@ static int print_resource(struct dlm_rsb *res, struct seq_file *s)
/* Print the locks attached to this resource */
seq_printf(s, "Granted Queue\n");
list_for_each_entry(lkb, &res->res_grantqueue, lkb_statequeue)
print_resource_lock(s, lkb, res);
print_format1_lock(s, lkb, res);
seq_printf(s, "Conversion Queue\n");
list_for_each_entry(lkb, &res->res_convertqueue, lkb_statequeue)
print_resource_lock(s, lkb, res);
print_format1_lock(s, lkb, res);
seq_printf(s, "Waiting Queue\n");
list_for_each_entry(lkb, &res->res_waitqueue, lkb_statequeue)
print_resource_lock(s, lkb, res);
print_format1_lock(s, lkb, res);
if (list_empty(&res->res_lookup))
goto out;
......@@ -160,23 +160,24 @@ static int print_resource(struct dlm_rsb *res, struct seq_file *s)
return 0;
}
static void print_lock(struct seq_file *s, struct dlm_lkb *lkb, struct dlm_rsb *r)
static void print_format2_lock(struct seq_file *s, struct dlm_lkb *lkb,
struct dlm_rsb *r)
{
unsigned int waiting = 0;
uint64_t xid = 0;
u64 xid = 0;
u64 us;
if (lkb->lkb_flags & DLM_IFL_USER) {
if (lkb->lkb_ua)
xid = lkb->lkb_ua->xid;
}
if (lkb->lkb_timestamp)
waiting = jiffies_to_msecs(jiffies - lkb->lkb_timestamp);
/* microseconds since lkb was added to current queue */
us = ktime_to_us(ktime_sub(ktime_get(), lkb->lkb_timestamp));
/* id nodeid remid pid xid exflags flags sts grmode rqmode time_ms
/* id nodeid remid pid xid exflags flags sts grmode rqmode time_us
r_nodeid r_len r_name */
seq_printf(s, "%x %d %x %u %llu %x %x %d %d %d %u %u %d \"%s\"\n",
seq_printf(s, "%x %d %x %u %llu %x %x %d %d %d %llu %u %d \"%s\"\n",
lkb->lkb_id,
lkb->lkb_nodeid,
lkb->lkb_remid,
......@@ -187,26 +188,114 @@ static void print_lock(struct seq_file *s, struct dlm_lkb *lkb, struct dlm_rsb *
lkb->lkb_status,
lkb->lkb_grmode,
lkb->lkb_rqmode,
waiting,
(unsigned long long)us,
r->res_nodeid,
r->res_length,
r->res_name);
}
static int print_locks(struct dlm_rsb *r, struct seq_file *s)
static int print_format2(struct dlm_rsb *r, struct seq_file *s)
{
struct dlm_lkb *lkb;
lock_rsb(r);
list_for_each_entry(lkb, &r->res_grantqueue, lkb_statequeue)
print_lock(s, lkb, r);
print_format2_lock(s, lkb, r);
list_for_each_entry(lkb, &r->res_convertqueue, lkb_statequeue)
print_lock(s, lkb, r);
print_format2_lock(s, lkb, r);
list_for_each_entry(lkb, &r->res_waitqueue, lkb_statequeue)
print_lock(s, lkb, r);
print_format2_lock(s, lkb, r);
unlock_rsb(r);
return 0;
}
static void print_format3_lock(struct seq_file *s, struct dlm_lkb *lkb,
int rsb_lookup)
{
u64 xid = 0;
if (lkb->lkb_flags & DLM_IFL_USER) {
if (lkb->lkb_ua)
xid = lkb->lkb_ua->xid;
}
seq_printf(s, "lkb %x %d %x %u %llu %x %x %d %d %d %d %d %d %u %llu %llu\n",
lkb->lkb_id,
lkb->lkb_nodeid,
lkb->lkb_remid,
lkb->lkb_ownpid,
(unsigned long long)xid,
lkb->lkb_exflags,
lkb->lkb_flags,
lkb->lkb_status,
lkb->lkb_grmode,
lkb->lkb_rqmode,
lkb->lkb_highbast,
rsb_lookup,
lkb->lkb_wait_type,
lkb->lkb_lvbseq,
(unsigned long long)ktime_to_ns(lkb->lkb_timestamp),
(unsigned long long)ktime_to_ns(lkb->lkb_time_bast));
}
static int print_format3(struct dlm_rsb *r, struct seq_file *s)
{
struct dlm_lkb *lkb;
int i, lvblen = r->res_ls->ls_lvblen;
int print_name = 1;
lock_rsb(r);
seq_printf(s, "rsb %p %d %x %lx %d %d %u %d ",
r,
r->res_nodeid,
r->res_first_lkid,
r->res_flags,
!list_empty(&r->res_root_list),
!list_empty(&r->res_recover_list),
r->res_recover_locks_count,
r->res_length);
for (i = 0; i < r->res_length; i++) {
if (!isascii(r->res_name[i]) || !isprint(r->res_name[i]))
print_name = 0;
}
seq_printf(s, "%s", print_name ? "str " : "hex");
for (i = 0; i < r->res_length; i++) {
if (print_name)
seq_printf(s, "%c", r->res_name[i]);
else
seq_printf(s, " %02x", (unsigned char)r->res_name[i]);
}
seq_printf(s, "\n");
if (!r->res_lvbptr)
goto do_locks;
seq_printf(s, "lvb %u %d", r->res_lvbseq, lvblen);
for (i = 0; i < lvblen; i++)
seq_printf(s, " %02x", (unsigned char)r->res_lvbptr[i]);
seq_printf(s, "\n");
do_locks:
list_for_each_entry(lkb, &r->res_grantqueue, lkb_statequeue)
print_format3_lock(s, lkb, 0);
list_for_each_entry(lkb, &r->res_convertqueue, lkb_statequeue)
print_format3_lock(s, lkb, 0);
list_for_each_entry(lkb, &r->res_waitqueue, lkb_statequeue)
print_format3_lock(s, lkb, 0);
list_for_each_entry(lkb, &r->res_lookup, lkb_rsb_lookup)
print_format3_lock(s, lkb, 1);
unlock_rsb(r);
return 0;
......@@ -231,7 +320,7 @@ static int rsb_iter_next(struct rsb_iter *ri)
break;
}
read_unlock(&ls->ls_rsbtbl[i].lock);
}
}
ri->entry = i;
if (ri->entry >= ls->ls_rsbtbl_size)
......@@ -248,7 +337,7 @@ static int rsb_iter_next(struct rsb_iter *ri)
read_unlock(&ls->ls_rsbtbl[i].lock);
dlm_put_rsb(old);
goto top;
}
}
ri->rsb = list_entry(ri->next, struct dlm_rsb, res_hashchain);
dlm_hold_rsb(ri->rsb);
read_unlock(&ls->ls_rsbtbl[i].lock);
......@@ -274,6 +363,7 @@ static struct rsb_iter *rsb_iter_init(struct dlm_ls *ls)
ri->ls = ls;
ri->entry = 0;
ri->next = NULL;
ri->format = 1;
if (rsb_iter_next(ri)) {
rsb_iter_free(ri);
......@@ -325,16 +415,26 @@ static int rsb_seq_show(struct seq_file *file, void *iter_ptr)
{
struct rsb_iter *ri = iter_ptr;
if (ri->locks) {
switch (ri->format) {
case 1:
print_format1(ri->rsb, file);
break;
case 2:
if (ri->header) {
seq_printf(file, "id nodeid remid pid xid exflags flags "
"sts grmode rqmode time_ms r_nodeid "
"r_len r_name\n");
seq_printf(file, "id nodeid remid pid xid exflags "
"flags sts grmode rqmode time_ms "
"r_nodeid r_len r_name\n");
ri->header = 0;
}
print_locks(ri->rsb, file);
} else {
print_resource(ri->rsb, file);
print_format2(ri->rsb, file);
break;
case 3:
if (ri->header) {
seq_printf(file, "version rsb 1.1 lvb 1.1 lkb 1.1\n");
ri->header = 0;
}
print_format3(ri->rsb, file);
break;
}
return 0;
......@@ -385,7 +485,7 @@ static struct rsb_iter *locks_iter_init(struct dlm_ls *ls, loff_t *pos)
ri->ls = ls;
ri->entry = 0;
ri->next = NULL;
ri->locks = 1;
ri->format = 2;
if (*pos == 0)
ri->header = 1;
......@@ -447,6 +547,84 @@ static const struct file_operations locks_fops = {
.release = seq_release
};
/*
* Dump all rsb/lvb/lkb state in compact listing, more complete than _locks
* This can replace both formats 1 and 2 eventually.
*/
static struct rsb_iter *all_iter_init(struct dlm_ls *ls, loff_t *pos)
{
struct rsb_iter *ri;
ri = kzalloc(sizeof *ri, GFP_KERNEL);
if (!ri)
return NULL;
ri->ls = ls;
ri->entry = 0;
ri->next = NULL;
ri->format = 3;
if (*pos == 0)
ri->header = 1;
if (rsb_iter_next(ri)) {
rsb_iter_free(ri);
return NULL;
}
return ri;
}
static void *all_seq_start(struct seq_file *file, loff_t *pos)
{
struct rsb_iter *ri;
loff_t n = *pos;
ri = all_iter_init(file->private, pos);
if (!ri)
return NULL;
while (n--) {
if (rsb_iter_next(ri)) {
rsb_iter_free(ri);
return NULL;
}
}
return ri;
}
static struct seq_operations all_seq_ops = {
.start = all_seq_start,
.next = rsb_seq_next,
.stop = rsb_seq_stop,
.show = rsb_seq_show,
};
static int all_open(struct inode *inode, struct file *file)
{
struct seq_file *seq;
int ret;
ret = seq_open(file, &all_seq_ops);
if (ret)
return ret;
seq = file->private_data;
seq->private = inode->i_private;
return 0;
}
static const struct file_operations all_fops = {
.owner = THIS_MODULE,
.open = all_open,
.read = seq_read,
.llseek = seq_lseek,
.release = seq_release
};
/*
* dump lkb's on the ls_waiters list
*/
......@@ -489,30 +667,33 @@ static const struct file_operations waiters_fops = {
.read = waiters_read
};
void dlm_delete_debug_file(struct dlm_ls *ls)
{
if (ls->ls_debug_rsb_dentry)
debugfs_remove(ls->ls_debug_rsb_dentry);
if (ls->ls_debug_waiters_dentry)
debugfs_remove(ls->ls_debug_waiters_dentry);
if (ls->ls_debug_locks_dentry)
debugfs_remove(ls->ls_debug_locks_dentry);
if (ls->ls_debug_all_dentry)
debugfs_remove(ls->ls_debug_all_dentry);
}
int dlm_create_debug_file(struct dlm_ls *ls)
{
char name[DLM_LOCKSPACE_LEN+8];
/* format 1 */
ls->ls_debug_rsb_dentry = debugfs_create_file(ls->ls_name,
S_IFREG | S_IRUGO,
dlm_root,
ls,
&rsb_fops);
if (!ls->ls_debug_rsb_dentry)
return -ENOMEM;
goto fail;
memset(name, 0, sizeof(name));
snprintf(name, DLM_LOCKSPACE_LEN+8, "%s_waiters", ls->ls_name);
ls->ls_debug_waiters_dentry = debugfs_create_file(name,
S_IFREG | S_IRUGO,
dlm_root,
ls,
&waiters_fops);
if (!ls->ls_debug_waiters_dentry) {
debugfs_remove(ls->ls_debug_rsb_dentry);
return -ENOMEM;
}
/* format 2 */
memset(name, 0, sizeof(name));
snprintf(name, DLM_LOCKSPACE_LEN+8, "%s_locks", ls->ls_name);
......@@ -522,23 +703,38 @@ int dlm_create_debug_file(struct dlm_ls *ls)
dlm_root,
ls,
&locks_fops);
if (!ls->ls_debug_locks_dentry) {
debugfs_remove(ls->ls_debug_waiters_dentry);
debugfs_remove(ls->ls_debug_rsb_dentry);
return -ENOMEM;
}
if (!ls->ls_debug_locks_dentry)
goto fail;
/* format 3 */
memset(name, 0, sizeof(name));
snprintf(name, DLM_LOCKSPACE_LEN+8, "%s_all", ls->ls_name);
ls->ls_debug_all_dentry = debugfs_create_file(name,
S_IFREG | S_IRUGO,
dlm_root,
ls,
&all_fops);
if (!ls->ls_debug_all_dentry)
goto fail;
memset(name, 0, sizeof(name));
snprintf(name, DLM_LOCKSPACE_LEN+8, "%s_waiters", ls->ls_name);
ls->ls_debug_waiters_dentry = debugfs_create_file(name,
S_IFREG | S_IRUGO,
dlm_root,
ls,
&waiters_fops);
if (!ls->ls_debug_waiters_dentry)
goto fail;
return 0;
}
void dlm_delete_debug_file(struct dlm_ls *ls)
{
if (ls->ls_debug_rsb_dentry)
debugfs_remove(ls->ls_debug_rsb_dentry);
if (ls->ls_debug_waiters_dentry)
debugfs_remove(ls->ls_debug_waiters_dentry);
if (ls->ls_debug_locks_dentry)
debugfs_remove(ls->ls_debug_locks_dentry);
fail:
dlm_delete_debug_file(ls);
return -ENOMEM;
}
int __init dlm_register_debugfs(void)
......
......@@ -374,7 +374,7 @@ void dlm_copy_master_names(struct dlm_ls *ls, char *inbuf, int inlen,
struct list_head *list;
struct dlm_rsb *r;
int offset = 0, dir_nodeid;
uint16_t be_namelen;
__be16 be_namelen;
down_read(&ls->ls_root_sem);
......@@ -410,15 +410,15 @@ void dlm_copy_master_names(struct dlm_ls *ls, char *inbuf, int inlen,
if (offset + sizeof(uint16_t)*2 + r->res_length > outlen) {
/* Write end-of-block record */
be_namelen = 0;
memcpy(outbuf + offset, &be_namelen, sizeof(uint16_t));
offset += sizeof(uint16_t);
be_namelen = cpu_to_be16(0);
memcpy(outbuf + offset, &be_namelen, sizeof(__be16));
offset += sizeof(__be16);
goto out;
}
be_namelen = cpu_to_be16(r->res_length);
memcpy(outbuf + offset, &be_namelen, sizeof(uint16_t));
offset += sizeof(uint16_t);
memcpy(outbuf + offset, &be_namelen, sizeof(__be16));
offset += sizeof(__be16);
memcpy(outbuf + offset, r->res_name, r->res_length);
offset += r->res_length;
}
......@@ -430,9 +430,9 @@ void dlm_copy_master_names(struct dlm_ls *ls, char *inbuf, int inlen,
if ((list == &ls->ls_root_list) &&
(offset + sizeof(uint16_t) <= outlen)) {
be_namelen = 0xFFFF;
memcpy(outbuf + offset, &be_namelen, sizeof(uint16_t));
offset += sizeof(uint16_t);
be_namelen = cpu_to_be16(0xFFFF);
memcpy(outbuf + offset, &be_namelen, sizeof(__be16));
offset += sizeof(__be16);
}
out:
......
......@@ -245,7 +245,8 @@ struct dlm_lkb {
struct list_head lkb_astqueue; /* need ast to be sent */
struct list_head lkb_ownqueue; /* list of locks for a process */
struct list_head lkb_time_list;
unsigned long lkb_timestamp;
ktime_t lkb_time_bast; /* for debugging */
ktime_t lkb_timestamp;
unsigned long lkb_timeout_cs;
char *lkb_lvbptr;
......@@ -481,6 +482,7 @@ struct dlm_ls {