On Tue, Jun 09, 2015 at 01:26:42PM +0200, Patrik Jakobsson wrote: [...] > --- a/Makefile.am > +++ b/Makefile.am > @@ -121,6 +121,7 @@ strace_SOURCES = \ > utime.c \ > utimes.c \ > v4l2.c \ > + drm.c \ > vsprintf.c \ > wait.c \ > xattr.c Starting with v4.7-166-g7ae73a9, we keep strace_SOURCES list sorted. > --- /dev/null > +++ b/drm.c [...] > +#include "defs.h" > + > +#include <sys/types.h> > +#include <unistd.h> > +#include <string.h> > +#include <linux/limits.h> > +#include <stdint.h> > +#include <sys/ioctl.h> > +#include <linux/types.h> > +#include <drm.h> No need to include header files already included by "defs.h". Most likely no need to include <linux/limits.h> or <linux/types.h>. > +#define DRM_MAX_NAME_LEN 128 > + > +inline int drm_is_priv(const unsigned int num) > +{ > + return (_IOC_NR(num) >= DRM_COMMAND_BASE && > + _IOC_NR(num) < DRM_COMMAND_END); > +} > + > +static int drm_get_driver_name(struct tcb *tcp, char *name, size_t bufsize) > +{ > + char path[PATH_MAX]; > + char link[PATH_MAX]; > + int ret; > + > + ret = getfdpath(tcp, tcp->u_arg[0], path, PATH_MAX - 1); > + if (!ret) > + return ret; > + > + snprintf(link, PATH_MAX, "/sys/class/drm/%s/device/driver", > + basename(path)); > + > + ret = readlink(link, path, PATH_MAX - 1); > + if (ret < 0) > + return ret; > + > + path[ret] = '\0'; > + strncpy(name, basename(path), bufsize); > + > + return 0; > +} > + > +int drm_is_driver(struct tcb *tcp, const char *name) > +{ > + char drv[DRM_MAX_NAME_LEN]; > + int ret; > + > + ret = drm_get_driver_name(tcp, drv, DRM_MAX_NAME_LEN); > + if (ret) > + return 0; > + > + return strcmp(name, drv) == 0; > +} This interface will result to several getfdpath() calls per ioctl_decode(). If the only purpose of drm_is_driver() is to help finding the most appropriate function, let's create a table of pairs {driver name, function} and pass this table to a function that will do a single getfdpath() call, calculate the driver name, and choose the right function from the table. [...] > @@ -284,6 +294,7 @@ ioctl_decode(struct tcb *tcp, unsigned int code, long arg) > * d sys/des.h (possible overlap) > * d vax/dkio.h (possible overlap) > * d vaxuba/rxreg.h (possible overlap) > + * d drm/drm.h > * f sys/filio.h > * g sunwindow/win_ioctl.h -no overlap- > * g sunwindowdev/winioctl.c !no manifest constant! -no overlap- This is a history, no need to patch it. -- ldv
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