aboutsummaryrefslogtreecommitdiffstats
path: root/fs/dlm/debug_fs.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/dlm/debug_fs.c')
-rw-r--r--fs/dlm/debug_fs.c103
1 files changed, 96 insertions, 7 deletions
diff --git a/fs/dlm/debug_fs.c b/fs/dlm/debug_fs.c
index 1c9b08095f98..b969deef9ebb 100644
--- a/fs/dlm/debug_fs.c
+++ b/fs/dlm/debug_fs.c
@@ -344,6 +344,45 @@ static int print_format3(struct dlm_rsb *r, struct seq_file *s)
return rv;
}
+static int print_format4(struct dlm_rsb *r, struct seq_file *s)
+{
+ int our_nodeid = dlm_our_nodeid();
+ int print_name = 1;
+ int i, rv;
+
+ lock_rsb(r);
+
+ rv = seq_printf(s, "rsb %p %d %d %d %d %lu %lx %d ",
+ r,
+ r->res_nodeid,
+ r->res_master_nodeid,
+ r->res_dir_nodeid,
+ our_nodeid,
+ r->res_toss_time,
+ r->res_flags,
+ r->res_length);
+ if (rv)
+ goto out;
+
+ 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]);
+ }
+ rv = seq_printf(s, "\n");
+ out:
+ unlock_rsb(r);
+ return rv;
+}
+
struct rsbtbl_iter {
struct dlm_rsb *rsb;
unsigned bucket;
@@ -382,6 +421,13 @@ static int table_seq_show(struct seq_file *seq, void *iter_ptr)
}
rv = print_format3(ri->rsb, seq);
break;
+ case 4:
+ if (ri->header) {
+ seq_printf(seq, "version 4 rsb 2\n");
+ ri->header = 0;
+ }
+ rv = print_format4(ri->rsb, seq);
+ break;
}
return rv;
@@ -390,15 +436,18 @@ static int table_seq_show(struct seq_file *seq, void *iter_ptr)
static const struct seq_operations format1_seq_ops;
static const struct seq_operations format2_seq_ops;
static const struct seq_operations format3_seq_ops;
+static const struct seq_operations format4_seq_ops;
static void *table_seq_start(struct seq_file *seq, loff_t *pos)
{
+ struct rb_root *tree;
struct rb_node *node;
struct dlm_ls *ls = seq->private;
struct rsbtbl_iter *ri;
struct dlm_rsb *r;
loff_t n = *pos;
unsigned bucket, entry;
+ int toss = (seq->op == &format4_seq_ops);
bucket = n >> 32;
entry = n & ((1LL << 32) - 1);
@@ -417,11 +466,14 @@ static void *table_seq_start(struct seq_file *seq, loff_t *pos)
ri->format = 2;
if (seq->op == &format3_seq_ops)
ri->format = 3;
+ if (seq->op == &format4_seq_ops)
+ ri->format = 4;
+
+ tree = toss ? &ls->ls_rsbtbl[bucket].toss : &ls->ls_rsbtbl[bucket].keep;
spin_lock(&ls->ls_rsbtbl[bucket].lock);
- if (!RB_EMPTY_ROOT(&ls->ls_rsbtbl[bucket].keep)) {
- for (node = rb_first(&ls->ls_rsbtbl[bucket].keep); node;
- node = rb_next(node)) {
+ if (!RB_EMPTY_ROOT(tree)) {
+ for (node = rb_first(tree); node; node = rb_next(node)) {
r = rb_entry(node, struct dlm_rsb, res_hashnode);
if (!entry--) {
dlm_hold_rsb(r);
@@ -449,10 +501,11 @@ static void *table_seq_start(struct seq_file *seq, loff_t *pos)
kfree(ri);
return NULL;
}
+ tree = toss ? &ls->ls_rsbtbl[bucket].toss : &ls->ls_rsbtbl[bucket].keep;
spin_lock(&ls->ls_rsbtbl[bucket].lock);
- if (!RB_EMPTY_ROOT(&ls->ls_rsbtbl[bucket].keep)) {
- node = rb_first(&ls->ls_rsbtbl[bucket].keep);
+ if (!RB_EMPTY_ROOT(tree)) {
+ node = rb_first(tree);
r = rb_entry(node, struct dlm_rsb, res_hashnode);
dlm_hold_rsb(r);
ri->rsb = r;
@@ -469,10 +522,12 @@ static void *table_seq_next(struct seq_file *seq, void *iter_ptr, loff_t *pos)
{
struct dlm_ls *ls = seq->private;
struct rsbtbl_iter *ri = iter_ptr;
+ struct rb_root *tree;
struct rb_node *next;
struct dlm_rsb *r, *rp;
loff_t n = *pos;
unsigned bucket;
+ int toss = (seq->op == &format4_seq_ops);
bucket = n >> 32;
@@ -511,10 +566,11 @@ static void *table_seq_next(struct seq_file *seq, void *iter_ptr, loff_t *pos)
kfree(ri);
return NULL;
}
+ tree = toss ? &ls->ls_rsbtbl[bucket].toss : &ls->ls_rsbtbl[bucket].keep;
spin_lock(&ls->ls_rsbtbl[bucket].lock);
- if (!RB_EMPTY_ROOT(&ls->ls_rsbtbl[bucket].keep)) {
- next = rb_first(&ls->ls_rsbtbl[bucket].keep);
+ if (!RB_EMPTY_ROOT(tree)) {
+ next = rb_first(tree);
r = rb_entry(next, struct dlm_rsb, res_hashnode);
dlm_hold_rsb(r);
ri->rsb = r;
@@ -558,9 +614,17 @@ static const struct seq_operations format3_seq_ops = {
.show = table_seq_show,
};
+static const struct seq_operations format4_seq_ops = {
+ .start = table_seq_start,
+ .next = table_seq_next,
+ .stop = table_seq_stop,
+ .show = table_seq_show,
+};
+
static const struct file_operations format1_fops;
static const struct file_operations format2_fops;
static const struct file_operations format3_fops;
+static const struct file_operations format4_fops;
static int table_open(struct inode *inode, struct file *file)
{
@@ -573,6 +637,8 @@ static int table_open(struct inode *inode, struct file *file)
ret = seq_open(file, &format2_seq_ops);
else if (file->f_op == &format3_fops)
ret = seq_open(file, &format3_seq_ops);
+ else if (file->f_op == &format4_fops)
+ ret = seq_open(file, &format4_seq_ops);
if (ret)
return ret;
@@ -606,6 +672,14 @@ static const struct file_operations format3_fops = {
.release = seq_release
};
+static const struct file_operations format4_fops = {
+ .owner = THIS_MODULE,
+ .open = table_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release
+};
+
/*
* dump lkb's on the ls_waiters list
*/
@@ -652,6 +726,8 @@ void dlm_delete_debug_file(struct dlm_ls *ls)
debugfs_remove(ls->ls_debug_locks_dentry);
if (ls->ls_debug_all_dentry)
debugfs_remove(ls->ls_debug_all_dentry);
+ if (ls->ls_debug_toss_dentry)
+ debugfs_remove(ls->ls_debug_toss_dentry);
}
int dlm_create_debug_file(struct dlm_ls *ls)
@@ -694,6 +770,19 @@ int dlm_create_debug_file(struct dlm_ls *ls)
if (!ls->ls_debug_all_dentry)
goto fail;
+ /* format 4 */
+
+ memset(name, 0, sizeof(name));
+ snprintf(name, DLM_LOCKSPACE_LEN+8, "%s_toss", ls->ls_name);
+
+ ls->ls_debug_toss_dentry = debugfs_create_file(name,
+ S_IFREG | S_IRUGO,
+ dlm_root,
+ ls,
+ &format4_fops);
+ if (!ls->ls_debug_toss_dentry)
+ goto fail;
+
memset(name, 0, sizeof(name));
snprintf(name, DLM_LOCKSPACE_LEN+8, "%s_waiters", ls->ls_name);
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.