shaba/lvm2
1
0
Fork 0
mirror of git://sourceware.org/git/lvm2.git synced 2024-12-21 13:34:40 +03:00
Code Releases Activity

lvmlockd: client mutex ordering

Browse Source 
Avoid deadlock between threads on mutexes (in theory.)
This commit is contained in:
David Teigland 2023-08-31 13:15:07 -05:00
parent 65d23a1d75
commit c37416b6aa
1 changed files with 6 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

8
daemons/lvmlockd/lvmlockd-core.c
View File

@ -4690,9 +4690,12 @@ static int dump_info(int *dump_len)
/*
* clients
* Proper lock order is client_mutex then cl->mutex,
* but cl->mutex is already held so skip client info
* if it would block.
*/
pthread_mutex_lock(&client_mutex);
if (pthread_mutex_trylock(&client_mutex))
goto print_ls;
list_for_each_entry(cl, &client_list, list) {
ret = print_client(cl, "client", pos, len);
if (ret >= len - pos) {
@ -4706,6 +4709,7 @@ static int dump_info(int *dump_len)
if (rv < 0)
return rv;
print_ls:
/*
* lockspaces with their action/resource/lock info
*/