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Code Issues Releases Activity

Add "show cdev" ddb command.

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In collaboration with:	pho
MFC after:	1 month
This commit is contained in:
Konstantin Belousov 2010-08-06 09:44:01 +00:00
parent 3979450b4c
commit 6c5e633cd6
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=210924
1 changed files with 68 additions and 0 deletions
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68
sys/kern/kern_conf.c
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@ -1229,3 +1229,71 @@ devdtr_init(void *dummy __unused)
}
SYSINIT(devdtr, SI_SUB_DEVFS, SI_ORDER_SECOND, devdtr_init, NULL);
#include "opt_ddb.h"
#ifdef DDB
#include <sys/kernel.h>
#include <ddb/ddb.h>
DB_SHOW_COMMAND(cdev, db_show_cdev)
{
struct cdev_priv *cdp;
struct cdev *dev;
u_int flags;
char buf[512];
if (!have_addr) {
TAILQ_FOREACH(cdp, &cdevp_list, cdp_list) {
dev = &cdp->cdp_c;
db_printf("%s %p\n", dev->si_name, dev);
if (db_pager_quit)
break;
}
return;
}
dev = (struct cdev *)addr;
cdp = cdev2priv(dev);
db_printf("dev %s ref %d use %ld thr %ld inuse %u fdpriv %p\n",
dev->si_name, dev->si_refcount, dev->si_usecount,
dev->si_threadcount, cdp->cdp_inuse, cdp->cdp_fdpriv.lh_first);
db_printf("devsw %p si_drv0 %d si_drv1 %p si_drv2 %p\n",
dev->si_devsw, dev->si_drv0, dev->si_drv1, dev->si_drv2);
flags = dev->si_flags;
#define SI_FLAG(flag) do { \
if (flags & (flag)) { \
if (buf[0] != '\0') \
strlcat(buf, ", ", sizeof(buf)); \
strlcat(buf, (#flag) + 3, sizeof(buf)); \
flags &= ~(flag); \
} \
} while (0)
buf[0] = '\0';
SI_FLAG(SI_ETERNAL);
SI_FLAG(SI_ALIAS);
SI_FLAG(SI_NAMED);
SI_FLAG(SI_CHEAPCLONE);
SI_FLAG(SI_CHILD);
SI_FLAG(SI_DEVOPEN);
SI_FLAG(SI_CONSOPEN);
SI_FLAG(SI_DUMPDEV);
SI_FLAG(SI_CANDELETE);
SI_FLAG(SI_CLONELIST);
db_printf("si_flags %s\n", buf);
flags = cdp->cdp_flags;
#define CDP_FLAG(flag) do { \
if (flags & (flag)) { \
if (buf[0] != '\0') \
strlcat(buf, ", ", sizeof(buf)); \
strlcat(buf, (#flag) + 4, sizeof(buf)); \
flags &= ~(flag); \
} \
} while (0)
buf[0] = '\0';
CDP_FLAG(CDP_ACTIVE);
CDP_FLAG(CDP_SCHED_DTR);
db_printf("cdp_flags %s\n", buf);
}
#endif