summaryrefslogtreecommitdiffstats
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.c164
1 files changed, 162 insertions, 2 deletions
diff --git a/fs/dlm/debug_fs.c b/fs/dlm/debug_fs.c
index 9e27a16..184be98 100644
--- a/fs/dlm/debug_fs.c
+++ b/fs/dlm/debug_fs.c
@@ -27,6 +27,8 @@ static struct dentry *dlm_root;
struct rsb_iter {
int entry;
+ int master;
+ int header;
struct dlm_ls *ls;
struct list_head *next;
struct dlm_rsb *rsb;
@@ -86,6 +88,8 @@ static int print_resource(struct dlm_rsb *res, struct seq_file *s)
struct dlm_lkb *lkb;
int i, lvblen = res->res_ls->ls_lvblen, recover_list, root_list;
+ lock_rsb(res);
+
seq_printf(s, "\nResource %p Name (len=%d) \"", res, res->res_length);
for (i = 0; i < res->res_length; i++) {
if (isprint(res->res_name[i]))
@@ -152,6 +156,59 @@ static int print_resource(struct dlm_rsb *res, struct seq_file *s)
seq_printf(s, "\n");
}
out:
+ unlock_rsb(res);
+ return 0;
+}
+
+static void print_master_lock(struct seq_file *s, struct dlm_lkb *lkb,
+ struct dlm_rsb *r)
+{
+ struct dlm_user_args *ua;
+ unsigned int waiting = 0;
+ uint64_t xid = 0;
+
+ if (lkb->lkb_flags & DLM_IFL_USER) {
+ ua = (struct dlm_user_args *) lkb->lkb_astparam;
+ if (ua)
+ xid = ua->xid;
+ }
+
+ if (lkb->lkb_timestamp)
+ waiting = jiffies_to_msecs(jiffies - lkb->lkb_timestamp);
+
+ /* id nodeid remid pid xid flags sts grmode rqmode time_ms len name */
+
+ seq_printf(s, "%x %d %x %u %llu %x %d %d %d %u %d \"%s\"\n",
+ lkb->lkb_id,
+ lkb->lkb_nodeid,
+ lkb->lkb_remid,
+ lkb->lkb_ownpid,
+ (unsigned long long)xid,
+ lkb->lkb_exflags,
+ lkb->lkb_status,
+ lkb->lkb_grmode,
+ lkb->lkb_rqmode,
+ waiting,
+ r->res_length,
+ r->res_name);
+}
+
+static int print_master_resource(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_master_lock(s, lkb, r);
+
+ list_for_each_entry(lkb, &r->res_convertqueue, lkb_statequeue)
+ print_master_lock(s, lkb, r);
+
+ list_for_each_entry(lkb, &r->res_waitqueue, lkb_statequeue)
+ print_master_lock(s, lkb, r);
+
+ unlock_rsb(r);
return 0;
}
@@ -209,7 +266,7 @@ static struct rsb_iter *rsb_iter_init(struct dlm_ls *ls)
{
struct rsb_iter *ri;
- ri = kmalloc(sizeof *ri, GFP_KERNEL);
+ ri = kzalloc(sizeof *ri, GFP_KERNEL);
if (!ri)
return NULL;
@@ -267,7 +324,17 @@ static int rsb_seq_show(struct seq_file *file, void *iter_ptr)
{
struct rsb_iter *ri = iter_ptr;
- print_resource(ri->rsb, file);
+ if (ri->master) {
+ if (ri->header) {
+ seq_printf(file, "id nodeid remid pid xid flags sts "
+ "grmode rqmode time_ms len name\n");
+ ri->header = 0;
+ }
+ if (is_master(ri->rsb))
+ print_master_resource(ri->rsb, file);
+ } else {
+ print_resource(ri->rsb, file);
+ }
return 0;
}
@@ -303,6 +370,83 @@ static const struct file_operations rsb_fops = {
};
/*
+ * Dump master lock state
+ */
+
+static struct rsb_iter *master_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->master = 1;
+
+ if (*pos == 0)
+ ri->header = 1;
+
+ if (rsb_iter_next(ri)) {
+ rsb_iter_free(ri);
+ return NULL;
+ }
+
+ return ri;
+}
+
+static void *master_seq_start(struct seq_file *file, loff_t *pos)
+{
+ struct rsb_iter *ri;
+ loff_t n = *pos;
+
+ ri = master_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 master_seq_ops = {
+ .start = master_seq_start,
+ .next = rsb_seq_next,
+ .stop = rsb_seq_stop,
+ .show = rsb_seq_show,
+};
+
+static int master_open(struct inode *inode, struct file *file)
+{
+ struct seq_file *seq;
+ int ret;
+
+ ret = seq_open(file, &master_seq_ops);
+ if (ret)
+ return ret;
+
+ seq = file->private_data;
+ seq->private = inode->i_private;
+
+ return 0;
+}
+
+static const struct file_operations master_fops = {
+ .owner = THIS_MODULE,
+ .open = master_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release
+};
+
+/*
* dump lkb's on the ls_waiters list
*/
@@ -369,6 +513,20 @@ int dlm_create_debug_file(struct dlm_ls *ls)
return -ENOMEM;
}
+ memset(name, 0, sizeof(name));
+ snprintf(name, DLM_LOCKSPACE_LEN+8, "%s_master", ls->ls_name);
+
+ ls->ls_debug_master_dentry = debugfs_create_file(name,
+ S_IFREG | S_IRUGO,
+ dlm_root,
+ ls,
+ &master_fops);
+ if (!ls->ls_debug_master_dentry) {
+ debugfs_remove(ls->ls_debug_waiters_dentry);
+ debugfs_remove(ls->ls_debug_rsb_dentry);
+ return -ENOMEM;
+ }
+
return 0;
}
@@ -378,6 +536,8 @@ void dlm_delete_debug_file(struct dlm_ls *ls)
debugfs_remove(ls->ls_debug_rsb_dentry);
if (ls->ls_debug_waiters_dentry)
debugfs_remove(ls->ls_debug_waiters_dentry);
+ if (ls->ls_debug_master_dentry)
+ debugfs_remove(ls->ls_debug_master_dentry);
}
int dlm_register_debugfs(void)
OpenPOWER on IntegriCloud