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authorJeff Layton <jeff.layton@primarydata.com>2016-01-06 21:26:10 -0500
committerJeff Layton <jeff.layton@primarydata.com>2016-01-08 11:38:13 -0500
commit1890910fd06fefbfa1cbeaf88357783914af71f6 (patch)
treeef28622f639666a05e89052573f595ca0e45c090 /fs/locks.c
parent0752ba807b04ccd69cb4bc8bbf829a80ee208a3c (diff)
downloadop-kernel-dev-1890910fd06fefbfa1cbeaf88357783914af71f6.zip
op-kernel-dev-1890910fd06fefbfa1cbeaf88357783914af71f6.tar.gz
locks: sprinkle some tracepoints around the file locking code
Add some tracepoints around the POSIX locking code. These were useful when tracking down problems when handling the race between setlk and close. Signed-off-by: Jeff Layton <jeff.layton@primarydata.com> Acked-by: "J. Bruce Fields" <bfields@fieldses.org>
Diffstat (limited to 'fs/locks.c')
-rw-r--r--fs/locks.c12
1 files changed, 9 insertions, 3 deletions
diff --git a/fs/locks.c b/fs/locks.c
index e72077d..0af2387 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -229,6 +229,7 @@ locks_get_lock_context(struct inode *inode, int type)
ctx = smp_load_acquire(&inode->i_flctx);
}
out:
+ trace_locks_get_lock_context(inode, type, ctx);
return ctx;
}
@@ -1141,6 +1142,8 @@ static int __posix_lock_file(struct inode *inode, struct file_lock *request, str
if (new_fl2)
locks_free_lock(new_fl2);
locks_dispose_list(&dispose);
+ trace_posix_lock_inode(inode, request, error);
+
return error;
}
@@ -2164,6 +2167,8 @@ int fcntl_setlk(unsigned int fd, struct file *filp, unsigned int cmd,
if (file_lock == NULL)
return -ENOLCK;
+ inode = file_inode(filp);
+
/*
* This might block, so we do it before checking the inode.
*/
@@ -2171,8 +2176,6 @@ int fcntl_setlk(unsigned int fd, struct file *filp, unsigned int cmd,
if (copy_from_user(&flock, l, sizeof(flock)))
goto out;
- inode = file_inode(filp);
-
/* Don't allow mandatory locks on files that may be memory mapped
* and shared.
*/
@@ -2241,6 +2244,7 @@ int fcntl_setlk(unsigned int fd, struct file *filp, unsigned int cmd,
}
}
out:
+ trace_fcntl_setlk(inode, file_lock, error);
locks_free_lock(file_lock);
return error;
}
@@ -2397,6 +2401,7 @@ out:
*/
void locks_remove_posix(struct file *filp, fl_owner_t owner)
{
+ int error;
struct file_lock lock;
struct file_lock_context *ctx;
@@ -2419,10 +2424,11 @@ void locks_remove_posix(struct file *filp, fl_owner_t owner)
lock.fl_ops = NULL;
lock.fl_lmops = NULL;
- vfs_lock_file(filp, F_SETLK, &lock, NULL);
+ error = vfs_lock_file(filp, F_SETLK, &lock, NULL);
if (lock.fl_ops && lock.fl_ops->fl_release_private)
lock.fl_ops->fl_release_private(&lock);
+ trace_locks_remove_posix(file_inode(filp), &lock, error);
}
EXPORT_SYMBOL(locks_remove_posix);
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