Remove explicit locking of struct file.

 - Introduce a finit() which is used to initailize the fields of struct file
   in such a way that the ops vector is only valid after the data, type,
   and flags are valid.
 - Protect f_flag and f_count with atomic operations.
 - Remove the global list of all files and associated accounting.
 - Rewrite the unp garbage collection such that it no longer requires
   the global list of all files and instead uses a list of all unp sockets.
 - Mark sockets in the accept queue so we don't incorrectly gc them.

Tested by:	kris, pho

1 files changed, 4 insertions, 8 deletions

diff --git a/sys/kern/sys_generic.c b/sys/kern/sys_generic.c
index 0800c08..9c800f3 100644
--- a/sys/kern/sys_generic.c
+++ b/sys/kern/sys_generic.c
@@ -646,21 +646,17 @@ kern_ioctl(struct thread *td, int fd, u_long com, caddr_t data)
 		FILEDESC_XUNLOCK(fdp);
 		goto out;
 	case FIONBIO:
-		FILE_LOCK(fp);
 		if ((tmp = *(int *)data))
-			fp->f_flag |= FNONBLOCK;
+			atomic_set_int(&fp->f_flag, FNONBLOCK);
 		else
-			fp->f_flag &= ~FNONBLOCK;
-		FILE_UNLOCK(fp);
+			atomic_clear_int(&fp->f_flag, FNONBLOCK);
 		data = (void *)&tmp;
 		break;
 	case FIOASYNC:
-		FILE_LOCK(fp);
 		if ((tmp = *(int *)data))
-			fp->f_flag |= FASYNC;
+			atomic_set_int(&fp->f_flag, FASYNC);
 		else
-			fp->f_flag &= ~FASYNC;
-		FILE_UNLOCK(fp);
+			atomic_clear_int(&fp->f_flag, FASYNC);
 		data = (void *)&tmp;
 		break;
 	}