diff options
Diffstat (limited to 'sys/fs/devfs/devfs_devs.c')
| -rw-r--r-- | sys/fs/devfs/devfs_devs.c | 32 |
1 files changed, 32 insertions, 0 deletions
diff --git a/sys/fs/devfs/devfs_devs.c b/sys/fs/devfs/devfs_devs.c index 37d3d90..2329b84 100644 --- a/sys/fs/devfs/devfs_devs.c +++ b/sys/fs/devfs/devfs_devs.c @@ -71,6 +71,38 @@ SYSCTL_UINT(_vfs_devfs, OID_AUTO, inodes, CTLFLAG_RD, SYSCTL_UINT(_vfs_devfs, OID_AUTO, topinode, CTLFLAG_RD, &devfs_topino, 0, "DEVFS highest inode#"); +/* + * Helper sysctl for devname(3). We're given a struct cdev * and return + * the name, if any, registered by the device driver. + */ +static int +sysctl_devname(SYSCTL_HANDLER_ARGS) +{ + int error; + dev_t ud; + struct cdev *dev, **dp; + + error = SYSCTL_IN(req, &ud, sizeof (ud)); + if (error) + return (error); + if (ud == NODEV) + return(EINVAL); + dp = devfs_itod(ud); + if (dp == NULL) + return(ENOENT); + dev = *dp; + if (dev == NULL) + return(ENOENT); + return(SYSCTL_OUT(req, dev->si_name, strlen(dev->si_name) + 1)); + return (error); +} + +SYSCTL_PROC(_kern, OID_AUTO, devname, CTLTYPE_OPAQUE|CTLFLAG_RW|CTLFLAG_ANYBODY, + NULL, 0, sysctl_devname, "", "devname(3) handler"); + +SYSCTL_INT(_debug_sizeof, OID_AUTO, cdev, CTLFLAG_RD, + 0, sizeof(struct cdev), "sizeof(struct cdev)"); + static int * devfs_itor(int inode) { |
