diff options
Diffstat (limited to 'lib/test_lockup.c')
| -rw-r--r-- | lib/test_lockup.c | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/lib/test_lockup.c b/lib/test_lockup.c index 83683ec1f429..ea09ca335b21 100644 --- a/lib/test_lockup.c +++ b/lib/test_lockup.c @@ -14,6 +14,7 @@ #include <linux/nmi.h> #include <linux/mm.h> #include <linux/uaccess.h> +#include <linux/file.h> static unsigned int time_secs; module_param(time_secs, uint, 0600); @@ -140,6 +141,24 @@ static bool reallocate_pages; module_param(reallocate_pages, bool, 0400); MODULE_PARM_DESC(reallocate_pages, "free and allocate pages between iterations"); +struct file *test_file; +struct inode *test_inode; +static char test_file_path[256]; +module_param_string(file_path, test_file_path, sizeof(test_file_path), 0400); +MODULE_PARM_DESC(file_path, "file path to test"); + +static bool test_lock_inode; +module_param_named(lock_inode, test_lock_inode, bool, 0400); +MODULE_PARM_DESC(lock_inode, "lock file -> inode -> i_rwsem"); + +static bool test_lock_mapping; +module_param_named(lock_mapping, test_lock_mapping, bool, 0400); +MODULE_PARM_DESC(lock_mapping, "lock file -> mapping -> i_mmap_rwsem"); + +static bool test_lock_sb_umount; +module_param_named(lock_sb_umount, test_lock_sb_umount, bool, 0400); +MODULE_PARM_DESC(lock_sb_umount, "lock file -> sb -> s_umount"); + static atomic_t alloc_pages_failed = ATOMIC_INIT(0); static atomic64_t max_lock_wait = ATOMIC64_INIT(0); @@ -490,6 +509,29 @@ static int __init test_lockup_init(void) return -EINVAL; } + if (test_file_path[0]) { + test_file = filp_open(test_file_path, O_RDONLY, 0); + if (IS_ERR(test_file)) { + pr_err("cannot find file_path\n"); + return -EINVAL; + } + test_inode = file_inode(test_file); + } else if (test_lock_inode || + test_lock_mapping || + test_lock_sb_umount) { + pr_err("no file to lock\n"); + return -EINVAL; + } + + if (test_lock_inode && test_inode) + lock_rwsem_ptr = (unsigned long)&test_inode->i_rwsem; + + if (test_lock_mapping && test_file && test_file->f_mapping) + lock_rwsem_ptr = (unsigned long)&test_file->f_mapping->i_mmap_rwsem; + + if (test_lock_sb_umount && test_inode) + lock_rwsem_ptr = (unsigned long)&test_inode->i_sb->s_umount; + pr_notice("START pid=%d time=%u +%u ns cooldown=%u +%u ns iterations=%u state=%s %s%s%s%s%s%s%s%s%s%s%s\n", main_task->pid, time_secs, time_nsecs, cooldown_secs, cooldown_nsecs, iterations, state, @@ -542,6 +584,9 @@ static int __init test_lockup_init(void) pr_notice("FINISH in %llu ns\n", local_clock() - test_start); + if (test_file) + fput(test_file); + if (signal_pending(main_task)) return -EINTR; |