aboutsummaryrefslogtreecommitdiffstats
path: root/fs/ocfs2/dlm/dlmdebug.c
diff options
context:
space:
mode:
Diffstat (limited to 'fs/ocfs2/dlm/dlmdebug.c')
-rw-r--r--fs/ocfs2/dlm/dlmdebug.c71
1 files changed, 71 insertions, 0 deletions
diff --git a/fs/ocfs2/dlm/dlmdebug.c b/fs/ocfs2/dlm/dlmdebug.c
index 6de326bf603a..a109005f70da 100644
--- a/fs/ocfs2/dlm/dlmdebug.c
+++ b/fs/ocfs2/dlm/dlmdebug.c
@@ -303,6 +303,7 @@ static int stringify_lockname(const char *lockname, int locklen,
303#define DLM_DEBUGFS_DLM_STATE "dlm_state" 303#define DLM_DEBUGFS_DLM_STATE "dlm_state"
304#define DLM_DEBUGFS_LOCKING_STATE "locking_state" 304#define DLM_DEBUGFS_LOCKING_STATE "locking_state"
305#define DLM_DEBUGFS_MLE_STATE "mle_state" 305#define DLM_DEBUGFS_MLE_STATE "mle_state"
306#define DLM_DEBUGFS_PURGE_LIST "purge_list"
306 307
307/* begin - utils funcs */ 308/* begin - utils funcs */
308static void dlm_debug_free(struct kref *kref) 309static void dlm_debug_free(struct kref *kref)
@@ -396,6 +397,63 @@ static int debug_buffer_release(struct inode *inode, struct file *file)
396} 397}
397/* end - util funcs */ 398/* end - util funcs */
398 399
400/* begin - purge list funcs */
401static int debug_purgelist_print(struct dlm_ctxt *dlm, struct debug_buffer *db)
402{
403 struct dlm_lock_resource *res;
404 int out = 0;
405 unsigned long total = 0;
406
407 out += snprintf(db->buf + out, db->len - out,
408 "Dumping Purgelist for Domain: %s\n", dlm->name);
409
410 spin_lock(&dlm->spinlock);
411 list_for_each_entry(res, &dlm->purge_list, purge) {
412 ++total;
413 if (db->len - out < 100)
414 continue;
415 spin_lock(&res->spinlock);
416 out += stringify_lockname(res->lockname.name,
417 res->lockname.len,
418 db->buf + out, db->len - out);
419 out += snprintf(db->buf + out, db->len - out, "\t%ld\n",
420 (jiffies - res->last_used)/HZ);
421 spin_unlock(&res->spinlock);
422 }
423 spin_unlock(&dlm->spinlock);
424
425 out += snprintf(db->buf + out, db->len - out,
426 "Total on list: %ld\n", total);
427
428 return out;
429}
430
431static int debug_purgelist_open(struct inode *inode, struct file *file)
432{
433 struct dlm_ctxt *dlm = inode->i_private;
434 struct debug_buffer *db;
435
436 db = debug_buffer_allocate();
437 if (!db)
438 goto bail;
439
440 db->len = debug_purgelist_print(dlm, db);
441
442 file->private_data = db;
443
444 return 0;
445bail:
446 return -ENOMEM;
447}
448
449static struct file_operations debug_purgelist_fops = {
450 .open = debug_purgelist_open,
451 .release = debug_buffer_release,
452 .read = debug_buffer_read,
453 .llseek = debug_buffer_llseek,
454};
455/* end - purge list funcs */
456
399/* begin - debug mle funcs */ 457/* begin - debug mle funcs */
400static int dump_mle(struct dlm_master_list_entry *mle, char *buf, int len) 458static int dump_mle(struct dlm_master_list_entry *mle, char *buf, int len)
401{ 459{
@@ -906,6 +964,17 @@ int dlm_debug_init(struct dlm_ctxt *dlm)
906 goto bail; 964 goto bail;
907 } 965 }
908 966
967 /* for dumping lockres on the purge list */
968 dc->debug_purgelist_dentry =
969 debugfs_create_file(DLM_DEBUGFS_PURGE_LIST,
970 S_IFREG|S_IRUSR,
971 dlm->dlm_debugfs_subroot,
972 dlm, &debug_purgelist_fops);
973 if (!dc->debug_purgelist_dentry) {
974 mlog_errno(-ENOMEM);
975 goto bail;
976 }
977
909 dlm_debug_get(dc); 978 dlm_debug_get(dc);
910 return 0; 979 return 0;
911 980
@@ -919,6 +988,8 @@ void dlm_debug_shutdown(struct dlm_ctxt *dlm)
919 struct dlm_debug_ctxt *dc = dlm->dlm_debug_ctxt; 988 struct dlm_debug_ctxt *dc = dlm->dlm_debug_ctxt;
920 989
921 if (dc) { 990 if (dc) {
991 if (dc->debug_purgelist_dentry)
992 debugfs_remove(dc->debug_purgelist_dentry);
922 if (dc->debug_mle_dentry) 993 if (dc->debug_mle_dentry)
923 debugfs_remove(dc->debug_mle_dentry); 994 debugfs_remove(dc->debug_mle_dentry);
924 if (dc->debug_lockres_dentry) 995 if (dc->debug_lockres_dentry)