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Add operation fstrans_held(struct mount *), true if the current thread

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holds a fstrans lock.

Ride 9.99.61
This commit is contained in:
hannken 2020-05-13 09:21:30 +00:00
parent feb45d8f30
commit a1b51d3577
2 changed files with 21 additions and 3 deletions
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21
sys/kern/vfs_trans.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: vfs_trans.c,v 1.61 2019/06/17 08:07:27 hannken Exp $ */
/* $NetBSD: vfs_trans.c,v 1.62 2020/05/13 09:21:30 hannken Exp $ */
/*-
* Copyright (c) 2007 The NetBSD Foundation, Inc.
@ -30,7 +30,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: vfs_trans.c,v 1.61 2019/06/17 08:07:27 hannken Exp $");
__KERNEL_RCSID(0, "$NetBSD: vfs_trans.c,v 1.62 2020/05/13 09:21:30 hannken Exp $");
/*
* File system transaction operations.
@ -568,6 +568,23 @@ fstrans_done(struct mount *mp)
mutex_exit(&fstrans_lock);
}
/*
* Check if we hold an lock.
*/
int
fstrans_held(struct mount *mp)
{
struct fstrans_lwp_info *fli;
struct fstrans_mount_info *fmi;
KASSERT(mp != dead_rootmount);
fli = fstrans_get_lwp_info(mp, true);
fmi = fli->fli_mountinfo;
return (fli->fli_trans_cnt > 0 || fmi->fmi_owner == curlwp);
}
/*
* Check if this thread has an exclusive lock.
*/

3
sys/sys/fstrans.h
View File

@ -1,4 +1,4 @@
/* $NetBSD: fstrans.h,v 1.13 2019/03/01 09:02:03 hannken Exp $ */
/* $NetBSD: fstrans.h,v 1.14 2020/05/13 09:21:30 hannken Exp $ */
/*-
* Copyright (c) 2007 The NetBSD Foundation, Inc.
@ -53,6 +53,7 @@ void fstrans_start(struct mount *);
int fstrans_start_nowait(struct mount *);
void fstrans_start_lazy(struct mount *);
void fstrans_done(struct mount *);
int fstrans_held(struct mount *);
int fstrans_is_owner(struct mount *);
int fstrans_mount(struct mount *);
void fstrans_unmount(struct mount *);