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Code Issues Releases Activity

Add the devctl notifications for the cdev create/destroy events.

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Based on the submission by: Andriy Gapon <avg icyb net ua>
MFC after:	2 weeks
This commit is contained in:
Konstantin Belousov 2008-05-14 14:29:54 +00:00
parent c4cbf0b605
commit 48504cc25b
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=178991
1 changed files with 42 additions and 0 deletions
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42
sys/kern/kern_conf.c
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@ -30,6 +30,7 @@ __FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/kernel.h>
#include <sys/systm.h>
#include <sys/bus.h>
#include <sys/bio.h>
#include <sys/lock.h>
#include <sys/mutex.h>
@ -526,6 +527,37 @@ unit2minor(int unit)
return ((unit & 0xff) | ((unit << 8) & ~0xffff));
}
static void
notify(struct cdev *dev, const char *ev)
{
static const char prefix[] = "cdev=";
char *data;
int namelen;
if (cold)
return;
namelen = strlen(dev->si_name);
data = malloc(namelen + sizeof(prefix), M_TEMP, M_WAITOK);
memcpy(data, prefix, sizeof(prefix) - 1);
memcpy(data + sizeof(prefix) - 1, dev->si_name, namelen + 1);
devctl_notify("DEVFS", "CDEV", ev, data);
free(data, M_TEMP);
}
static void
notify_create(struct cdev *dev)
{
notify(dev, "CREATE");
}
static void
notify_destroy(struct cdev *dev)
{
notify(dev, "DESTROY");
}
static struct cdev *
newdev(struct cdevsw *csw, int y, struct cdev *si)
{
@ -706,6 +738,9 @@ make_dev_credv(int flags, struct cdevsw *devsw, int minornr,
devfs_create(dev);
clean_unrhdrl(devfs_inos);
dev_unlock_and_free();
notify_create(dev);
return (dev);
}
@ -794,6 +829,9 @@ make_dev_alias(struct cdev *pdev, const char *fmt, ...)
clean_unrhdrl(devfs_inos);
dev_unlock();
dev_depends(pdev, dev);
notify_create(dev);
return (dev);
}
@ -842,6 +880,10 @@ destroy_devl(struct cdev *dev)
msleep(&csw, &devmtx, PRIBIO, "devdrn", hz / 10);
}
mtx_unlock(&devmtx);
notify_destroy(dev);
mtx_lock(&devmtx);
dev->si_drv1 = 0;
dev->si_drv2 = 0;
bzero(&dev->__si_u, sizeof(dev->__si_u));