diff options
| -rw-r--r-- | sys/kern/kern_conf.c | 25 | ||||
| -rw-r--r-- | sys/sys/conf.h | 3 |
2 files changed, 28 insertions, 0 deletions
diff --git a/sys/kern/kern_conf.c b/sys/kern/kern_conf.c index 46fca85..e3e9495 100644 --- a/sys/kern/kern_conf.c +++ b/sys/kern/kern_conf.c @@ -84,12 +84,14 @@ dev_lock(void) void dev_unlock(void) { + mtx_unlock(&devmtx); } void dev_ref(struct cdev *dev) { + dev_lock(); dev->si_refcount++; dev_unlock(); @@ -107,6 +109,29 @@ dev_rel(struct cdev *dev) freedev(dev); } } +struct cdevsw * +dev_refthread(struct cdev *dev) +{ + struct cdevsw *csw; + + mtx_assert(&devmtx, MA_NOTOWNED); + dev_lock(); + csw = dev->si_devsw; + if (csw != NULL) + dev->si_threadcount++; + dev_unlock(); + return (csw); +} + +void +dev_relthread(struct cdev *dev) +{ + + mtx_assert(&devmtx, MA_NOTOWNED); + dev_lock(); + dev->si_threadcount--; + dev_unlock(); +} int nullop(void) diff --git a/sys/sys/conf.h b/sys/sys/conf.h index eed4b4b..426bc2f 100644 --- a/sys/sys/conf.h +++ b/sys/sys/conf.h @@ -61,6 +61,7 @@ struct cdev { #define SI_DUMPDEV 0x0080 /* is kernel dumpdev */ #define SI_CANDELETE 0x0100 /* can do BIO_DELETE */ #define SI_CLONELIST 0x0200 /* on a clone list */ +#define SI_ISDISK 0x0400 /* device is a disk */ struct timespec si_atime; struct timespec si_ctime; struct timespec si_mtime; @@ -261,6 +262,8 @@ int clone_create(struct clonedevs **, struct cdevsw *, int *unit, struct cdev ** int count_dev(struct cdev *_dev); void destroy_dev(struct cdev *_dev); struct cdevsw *devsw(struct cdev *_dev); +struct cdevsw *dev_refthread(struct cdev *_dev); +void dev_relthread(struct cdev *_dev); const char *devtoname(struct cdev *_dev); int dev_named(struct cdev *_pdev, const char *_name); void dev_depends(struct cdev *_pdev, struct cdev *_cdev); |
