compat_ioctl: pass compat pointer directly to handlers
Instead of having each handler call compat_ptr, we can now convert the pointer once and pass that to each handler. This saves a little bit of both source and object code size. Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Arnd Bergmann
Родитель
661f627da9
Коммит
43c6e7b97f
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@ -117,7 +117,8 @@
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#include <asm/fbio.h>
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#endif
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static int w_long(unsigned int fd, unsigned int cmd, unsigned long arg)
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static int w_long(unsigned int fd, unsigned int cmd,
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compat_ulong_t __user *argp)
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{
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mm_segment_t old_fs = get_fs();
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int err;
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@ -126,24 +127,24 @@ static int w_long(unsigned int fd, unsigned int cmd, unsigned long arg)
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set_fs (KERNEL_DS);
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err = sys_ioctl(fd, cmd, (unsigned long)&val);
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set_fs (old_fs);
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if (!err && put_user(val, (u32 __user *)compat_ptr(arg)))
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if (!err && put_user(val, argp))
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return -EFAULT;
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return err;
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}
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static int rw_long(unsigned int fd, unsigned int cmd, unsigned long arg)
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static int rw_long(unsigned int fd, unsigned int cmd,
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compat_ulong_t __user *argp)
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{
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mm_segment_t old_fs = get_fs();
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u32 __user *argptr = compat_ptr(arg);
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int err;
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unsigned long val;
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if(get_user(val, argptr))
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if(get_user(val, argp))
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return -EFAULT;
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set_fs (KERNEL_DS);
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err = sys_ioctl(fd, cmd, (unsigned long)&val);
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set_fs (old_fs);
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if (!err && put_user(val, argptr))
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if (!err && put_user(val, argp))
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return -EFAULT;
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return err;
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}
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@ -157,7 +158,8 @@ struct compat_video_event {
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} u;
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};
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static int do_video_get_event(unsigned int fd, unsigned int cmd, unsigned long arg)
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static int do_video_get_event(unsigned int fd, unsigned int cmd,
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struct compat_video_event __user *up)
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{
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struct video_event kevent;
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mm_segment_t old_fs = get_fs();
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@ -168,8 +170,6 @@ static int do_video_get_event(unsigned int fd, unsigned int cmd, unsigned long a
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set_fs(old_fs);
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if (!err) {
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struct compat_video_event __user *up = compat_ptr(arg);
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err = put_user(kevent.type, &up->type);
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err |= put_user(kevent.timestamp, &up->timestamp);
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err |= put_user(kevent.u.size.w, &up->u.size.w);
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@ -188,15 +188,14 @@ struct compat_video_still_picture {
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int32_t size;
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};
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static int do_video_stillpicture(unsigned int fd, unsigned int cmd, unsigned long arg)
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static int do_video_stillpicture(unsigned int fd, unsigned int cmd,
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struct compat_video_still_picture __user *up)
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{
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struct compat_video_still_picture __user *up;
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struct video_still_picture __user *up_native;
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compat_uptr_t fp;
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int32_t size;
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int err;
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up = (struct compat_video_still_picture __user *) arg;
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err = get_user(fp, &up->iFrame);
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err |= get_user(size, &up->size);
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if (err)
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@ -220,14 +219,13 @@ struct compat_video_spu_palette {
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compat_uptr_t palette;
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};
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static int do_video_set_spu_palette(unsigned int fd, unsigned int cmd, unsigned long arg)
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static int do_video_set_spu_palette(unsigned int fd, unsigned int cmd,
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struct compat_video_spu_palette __user *up)
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{
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struct compat_video_spu_palette __user *up;
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struct video_spu_palette __user *up_native;
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compat_uptr_t palp;
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int length, err;
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up = (struct compat_video_spu_palette __user *) arg;
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err = get_user(palp, &up->palette);
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err |= get_user(length, &up->length);
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@ -295,16 +293,15 @@ static int sg_build_iovec(sg_io_hdr_t __user *sgio, void __user *dxferp, u16 iov
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return 0;
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}
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static int sg_ioctl_trans(unsigned int fd, unsigned int cmd, unsigned long arg)
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static int sg_ioctl_trans(unsigned int fd, unsigned int cmd,
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sg_io_hdr32_t __user *sgio32)
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{
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sg_io_hdr_t __user *sgio;
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sg_io_hdr32_t __user *sgio32;
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u16 iovec_count;
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u32 data;
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void __user *dxferp;
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int err;
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sgio32 = compat_ptr(arg);
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if (get_user(iovec_count, &sgio32->iovec_count))
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return -EFAULT;
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@ -394,11 +391,11 @@ struct compat_sg_req_info { /* used by SG_GET_REQUEST_TABLE ioctl() */
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int unused;
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};
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static int sg_grt_trans(unsigned int fd, unsigned int cmd, unsigned long arg)
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static int sg_grt_trans(unsigned int fd, unsigned int cmd, struct
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compat_sg_req_info __user *o)
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{
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int err, i;
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sg_req_info_t __user *r;
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struct compat_sg_req_info __user *o = (void __user *)arg;
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r = compat_alloc_user_space(sizeof(sg_req_info_t)*SG_MAX_QUEUE);
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err = sys_ioctl(fd,cmd,(unsigned long)r);
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if (err < 0)
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@ -426,9 +423,9 @@ struct sock_fprog32 {
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#define PPPIOCSPASS32 _IOW('t', 71, struct sock_fprog32)
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#define PPPIOCSACTIVE32 _IOW('t', 70, struct sock_fprog32)
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static int ppp_sock_fprog_ioctl_trans(unsigned int fd, unsigned int cmd, unsigned long arg)
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static int ppp_sock_fprog_ioctl_trans(unsigned int fd, unsigned int cmd,
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struct sock_fprog32 __user *u_fprog32)
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{
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struct sock_fprog32 __user *u_fprog32 = compat_ptr(arg);
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struct sock_fprog __user *u_fprog64 = compat_alloc_user_space(sizeof(struct sock_fprog));
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void __user *fptr64;
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u32 fptr32;
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@ -465,15 +462,14 @@ struct ppp_idle32 {
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};
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#define PPPIOCGIDLE32 _IOR('t', 63, struct ppp_idle32)
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static int ppp_gidle(unsigned int fd, unsigned int cmd, unsigned long arg)
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static int ppp_gidle(unsigned int fd, unsigned int cmd,
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struct ppp_idle32 __user *idle32)
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{
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struct ppp_idle __user *idle;
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struct ppp_idle32 __user *idle32;
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__kernel_time_t xmit, recv;
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int err;
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idle = compat_alloc_user_space(sizeof(*idle));
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idle32 = compat_ptr(arg);
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err = sys_ioctl(fd, PPPIOCGIDLE, (unsigned long) idle);
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@ -487,15 +483,14 @@ static int ppp_gidle(unsigned int fd, unsigned int cmd, unsigned long arg)
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return err;
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}
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static int ppp_scompress(unsigned int fd, unsigned int cmd, unsigned long arg)
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static int ppp_scompress(unsigned int fd, unsigned int cmd,
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struct ppp_option_data32 __user *odata32)
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{
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struct ppp_option_data __user *odata;
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struct ppp_option_data32 __user *odata32;
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__u32 data;
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void __user *datap;
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odata = compat_alloc_user_space(sizeof(*odata));
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odata32 = compat_ptr(arg);
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if (get_user(data, &odata32->ptr))
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return -EFAULT;
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@ -511,35 +506,6 @@ static int ppp_scompress(unsigned int fd, unsigned int cmd, unsigned long arg)
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return sys_ioctl(fd, PPPIOCSCOMPRESS, (unsigned long) odata);
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}
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static int ppp_ioctl_trans(unsigned int fd, unsigned int cmd, unsigned long arg)
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{
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int err;
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switch (cmd) {
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case PPPIOCGIDLE32:
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err = ppp_gidle(fd, cmd, arg);
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break;
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case PPPIOCSCOMPRESS32:
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err = ppp_scompress(fd, cmd, arg);
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break;
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default:
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do {
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static int count;
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if (++count <= 20)
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printk("ppp_ioctl: Unknown cmd fd(%d) "
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"cmd(%08x) arg(%08x)\n",
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(int)fd, (unsigned int)cmd, (unsigned int)arg);
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} while(0);
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err = -EINVAL;
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break;
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};
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return err;
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}
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#ifdef CONFIG_BLOCK
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struct mtget32 {
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compat_long_t mt_type;
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@ -557,7 +523,7 @@ struct mtpos32 {
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};
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#define MTIOCPOS32 _IOR('m', 3, struct mtpos32)
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static int mt_ioctl_trans(unsigned int fd, unsigned int cmd, unsigned long arg)
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static int mt_ioctl_trans(unsigned int fd, unsigned int cmd, void __user *argp)
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{
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mm_segment_t old_fs = get_fs();
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struct mtget get;
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@ -577,15 +543,6 @@ static int mt_ioctl_trans(unsigned int fd, unsigned int cmd, unsigned long arg)
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kcmd = MTIOCGET;
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karg = &get;
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break;
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default:
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do {
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static int count;
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if (++count <= 20)
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printk("mt_ioctl: Unknown cmd fd(%d) "
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"cmd(%08x) arg(%08x)\n",
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(int)fd, (unsigned int)cmd, (unsigned int)arg);
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} while(0);
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return -EINVAL;
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}
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set_fs (KERNEL_DS);
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err = sys_ioctl (fd, kcmd, (unsigned long)karg);
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@ -594,11 +551,11 @@ static int mt_ioctl_trans(unsigned int fd, unsigned int cmd, unsigned long arg)
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return err;
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switch (cmd) {
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case MTIOCPOS32:
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upos32 = compat_ptr(arg);
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upos32 = argp;
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err = __put_user(pos.mt_blkno, &upos32->mt_blkno);
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break;
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case MTIOCGET32:
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umget32 = compat_ptr(arg);
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umget32 = argp;
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err = __put_user(get.mt_type, &umget32->mt_type);
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err |= __put_user(get.mt_resid, &umget32->mt_resid);
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err |= __put_user(get.mt_dsreg, &umget32->mt_dsreg);
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@ -613,7 +570,8 @@ static int mt_ioctl_trans(unsigned int fd, unsigned int cmd, unsigned long arg)
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#endif /* CONFIG_BLOCK */
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static int do_smb_getmountuid(unsigned int fd, unsigned int cmd, unsigned long arg)
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static int do_smb_getmountuid(unsigned int fd, unsigned int cmd,
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compat_uid_t __user *argp)
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{
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mm_segment_t old_fs = get_fs();
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__kernel_uid_t kuid;
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@ -626,14 +584,15 @@ static int do_smb_getmountuid(unsigned int fd, unsigned int cmd, unsigned long a
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set_fs(old_fs);
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if (err >= 0)
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err = put_user(kuid, (compat_uid_t __user *)compat_ptr(arg));
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err = put_user(kuid, argp);
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return err;
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}
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static int ioc_settimeout(unsigned int fd, unsigned int cmd, unsigned long arg)
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static int ioc_settimeout(unsigned int fd, unsigned int cmd,
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compat_ulong_t __user *argp)
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{
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return rw_long(fd, AUTOFS_IOC_SETTIMEOUT, arg);
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return rw_long(fd, AUTOFS_IOC_SETTIMEOUT, argp);
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}
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/* Bluetooth ioctls */
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@ -691,7 +650,8 @@ static int set_raw32_request(struct raw_config_request *req, struct raw32_config
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return ret ? -EFAULT : 0;
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}
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static int raw_ioctl(unsigned fd, unsigned cmd, unsigned long arg)
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static int raw_ioctl(unsigned fd, unsigned cmd,
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struct raw32_config_request __user *user_req)
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{
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int ret;
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@ -699,7 +659,6 @@ static int raw_ioctl(unsigned fd, unsigned cmd, unsigned long arg)
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case RAW_SETBIND:
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case RAW_GETBIND: {
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struct raw_config_request req;
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struct raw32_config_request __user *user_req = compat_ptr(arg);
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mm_segment_t oldfs = get_fs();
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if ((ret = get_raw32_request(&req, user_req)))
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@ -714,9 +673,6 @@ static int raw_ioctl(unsigned fd, unsigned cmd, unsigned long arg)
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}
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break;
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}
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default:
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ret = sys_ioctl(fd, cmd, arg);
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break;
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}
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return ret;
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}
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@ -744,11 +700,11 @@ struct serial_struct32 {
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compat_int_t reserved[1];
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};
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static int serial_struct_ioctl(unsigned fd, unsigned cmd, unsigned long arg)
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static int serial_struct_ioctl(unsigned fd, unsigned cmd,
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struct serial_struct32 __user *ss32)
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{
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typedef struct serial_struct SS;
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typedef struct serial_struct32 SS32;
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struct serial_struct32 __user *ss32 = compat_ptr(arg);
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int err;
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struct serial_struct ss;
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mm_segment_t oldseg = get_fs();
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@ -798,9 +754,9 @@ struct usbdevfs_ctrltransfer32 {
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#define USBDEVFS_CONTROL32 _IOWR('U', 0, struct usbdevfs_ctrltransfer32)
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static int do_usbdevfs_control(unsigned int fd, unsigned int cmd, unsigned long arg)
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static int do_usbdevfs_control(unsigned int fd, unsigned int cmd,
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struct usbdevfs_ctrltransfer32 __user *p32)
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{
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struct usbdevfs_ctrltransfer32 __user *p32 = compat_ptr(arg);
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struct usbdevfs_ctrltransfer __user *p;
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__u32 udata;
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p = compat_alloc_user_space(sizeof(*p));
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@ -821,9 +777,9 @@ struct usbdevfs_bulktransfer32 {
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#define USBDEVFS_BULK32 _IOWR('U', 2, struct usbdevfs_bulktransfer32)
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static int do_usbdevfs_bulk(unsigned int fd, unsigned int cmd, unsigned long arg)
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static int do_usbdevfs_bulk(unsigned int fd, unsigned int cmd,
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struct usbdevfs_bulktransfer32 __user *p32)
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{
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struct usbdevfs_bulktransfer32 __user *p32 = compat_ptr(arg);
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struct usbdevfs_bulktransfer __user *p;
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compat_uint_t n;
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compat_caddr_t addr;
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@ -852,16 +808,14 @@ struct usbdevfs_disconnectsignal32 {
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#define USBDEVFS_DISCSIGNAL32 _IOR('U', 14, struct usbdevfs_disconnectsignal32)
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static int do_usbdevfs_discsignal(unsigned int fd, unsigned int cmd, unsigned long arg)
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static int do_usbdevfs_discsignal(unsigned int fd, unsigned int cmd,
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struct usbdevfs_disconnectsignal32 __user *udis)
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{
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struct usbdevfs_disconnectsignal kdis;
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struct usbdevfs_disconnectsignal32 __user *udis;
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mm_segment_t old_fs;
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u32 uctx;
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int err;
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udis = compat_ptr(arg);
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if (get_user(kdis.signr, &udis->signr) ||
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__get_user(uctx, &udis->context))
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return -EFAULT;
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@ -904,9 +858,9 @@ struct i2c_rdwr_aligned {
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struct i2c_msg msgs[0];
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};
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static int do_i2c_rdwr_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg)
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static int do_i2c_rdwr_ioctl(unsigned int fd, unsigned int cmd,
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struct i2c_rdwr_ioctl_data32 __user *udata)
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{
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struct i2c_rdwr_ioctl_data32 __user *udata = compat_ptr(arg);
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struct i2c_rdwr_aligned __user *tdata;
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struct i2c_msg __user *tmsgs;
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struct i2c_msg32 __user *umsgs;
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@ -940,10 +894,10 @@ static int do_i2c_rdwr_ioctl(unsigned int fd, unsigned int cmd, unsigned long ar
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return sys_ioctl(fd, cmd, (unsigned long)tdata);
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}
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static int do_i2c_smbus_ioctl(unsigned int fd, unsigned int cmd, unsigned long arg)
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static int do_i2c_smbus_ioctl(unsigned int fd, unsigned int cmd,
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struct i2c_smbus_ioctl_data32 __user *udata)
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{
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struct i2c_smbus_ioctl_data __user *tdata;
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struct i2c_smbus_ioctl_data32 __user *udata;
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compat_caddr_t datap;
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tdata = compat_alloc_user_space(sizeof(*tdata));
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@ -952,7 +906,6 @@ static int do_i2c_smbus_ioctl(unsigned int fd, unsigned int cmd, unsigned long a
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if (!access_ok(VERIFY_WRITE, tdata, sizeof(*tdata)))
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return -EFAULT;
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udata = compat_ptr(arg);
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if (!access_ok(VERIFY_READ, udata, sizeof(*udata)))
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return -EFAULT;
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@ -972,7 +925,7 @@ static int do_i2c_smbus_ioctl(unsigned int fd, unsigned int cmd, unsigned long a
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#define RTC_EPOCH_READ32 _IOR('p', 0x0d, compat_ulong_t)
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#define RTC_EPOCH_SET32 _IOW('p', 0x0e, compat_ulong_t)
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static int rtc_ioctl(unsigned fd, unsigned cmd, unsigned long arg)
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static int rtc_ioctl(unsigned fd, unsigned cmd, void __user *argp)
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{
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mm_segment_t oldfs = get_fs();
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compat_ulong_t val32;
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@ -990,21 +943,20 @@ static int rtc_ioctl(unsigned fd, unsigned cmd, unsigned long arg)
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if (ret)
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return ret;
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val32 = kval;
|
||||
return put_user(val32, (unsigned int __user *)arg);
|
||||
return put_user(val32, (unsigned int __user *)argp);
|
||||
case RTC_IRQP_SET32:
|
||||
return sys_ioctl(fd, RTC_IRQP_SET, arg);
|
||||
return sys_ioctl(fd, RTC_IRQP_SET, (unsigned long)argp);
|
||||
case RTC_EPOCH_SET32:
|
||||
return sys_ioctl(fd, RTC_EPOCH_SET, arg);
|
||||
default:
|
||||
/* unreached */
|
||||
return -ENOIOCTLCMD;
|
||||
return sys_ioctl(fd, RTC_EPOCH_SET, (unsigned long)argp);
|
||||
}
|
||||
|
||||
return -ENOIOCTLCMD;
|
||||
}
|
||||
|
||||
static int
|
||||
lp_timeout_trans(unsigned int fd, unsigned int cmd, unsigned long arg)
|
||||
lp_timeout_trans(unsigned int fd, unsigned int cmd,
|
||||
struct compat_timeval __user *tc)
|
||||
{
|
||||
struct compat_timeval __user *tc = (struct compat_timeval __user *)arg;
|
||||
struct timeval __user *tn = compat_alloc_user_space(sizeof(struct timeval));
|
||||
struct timeval ts;
|
||||
if (get_user(ts.tv_sec, &tc->tv_sec) ||
|
||||
|
|
@ -1032,9 +984,9 @@ struct space_resv_32 {
|
|||
#define FS_IOC_RESVSP64_32 _IOW ('X', 42, struct space_resv_32)
|
||||
|
||||
/* just account for different alignment */
|
||||
static int compat_ioctl_preallocate(struct file *file, unsigned long arg)
|
||||
static int compat_ioctl_preallocate(struct file *file,
|
||||
struct space_resv_32 __user *p32)
|
||||
{
|
||||
struct space_resv_32 __user *p32 = compat_ptr(arg);
|
||||
struct space_resv __user *p = compat_alloc_user_space(sizeof(*p));
|
||||
|
||||
if (copy_in_user(&p->l_type, &p32->l_type, sizeof(s16)) ||
|
||||
|
|
@ -1720,69 +1672,72 @@ IGNORE_IOCTL(FBIOGCURSOR32)
|
|||
static long do_ioctl_trans(int fd, unsigned int cmd,
|
||||
unsigned long arg, struct file *file)
|
||||
{
|
||||
void __user *argp = compat_ptr(arg);
|
||||
|
||||
switch (cmd) {
|
||||
case PPPIOCGIDLE32:
|
||||
return ppp_gidle(fd, cmd, argp);
|
||||
case PPPIOCSCOMPRESS32:
|
||||
return ppp_ioctl_trans(fd, cmd, arg);
|
||||
return ppp_scompress(fd, cmd, argp);
|
||||
case PPPIOCSPASS32:
|
||||
case PPPIOCSACTIVE32:
|
||||
return ppp_sock_fprog_ioctl_trans(fd, cmd, arg);
|
||||
return ppp_sock_fprog_ioctl_trans(fd, cmd, argp);
|
||||
#ifdef CONFIG_BLOCK
|
||||
case SG_IO:
|
||||
return sg_ioctl_trans(fd, cmd, arg);
|
||||
return sg_ioctl_trans(fd, cmd, argp);
|
||||
case SG_GET_REQUEST_TABLE:
|
||||
return sg_grt_trans(fd, cmd, arg);
|
||||
return sg_grt_trans(fd, cmd, argp);
|
||||
case MTIOCGET32:
|
||||
case MTIOCPOS32:
|
||||
return mt_ioctl_trans(fd, cmd, arg);
|
||||
return mt_ioctl_trans(fd, cmd, argp);
|
||||
/* Raw devices */
|
||||
case RAW_SETBIND:
|
||||
case RAW_GETBIND:
|
||||
return raw_ioctl(fd, cmd, arg);
|
||||
return raw_ioctl(fd, cmd, argp);
|
||||
#endif
|
||||
#define AUTOFS_IOC_SETTIMEOUT32 _IOWR(0x93,0x64,unsigned int)
|
||||
case AUTOFS_IOC_SETTIMEOUT32:
|
||||
return ioc_settimeout(fd, cmd, arg);
|
||||
return ioc_settimeout(fd, cmd, argp);
|
||||
/* One SMB ioctl needs translations. */
|
||||
#define SMB_IOC_GETMOUNTUID_32 _IOR('u', 1, compat_uid_t)
|
||||
case SMB_IOC_GETMOUNTUID_32:
|
||||
return do_smb_getmountuid(fd, cmd, arg);
|
||||
return do_smb_getmountuid(fd, cmd, argp);
|
||||
/* Serial */
|
||||
case TIOCGSERIAL:
|
||||
case TIOCSSERIAL:
|
||||
return serial_struct_ioctl(fd, cmd, arg);
|
||||
return serial_struct_ioctl(fd, cmd, argp);
|
||||
/* Usbdevfs */
|
||||
case USBDEVFS_CONTROL32:
|
||||
return do_usbdevfs_control(fd, cmd, arg);
|
||||
return do_usbdevfs_control(fd, cmd, argp);
|
||||
case USBDEVFS_BULK32:
|
||||
return do_usbdevfs_bulk(fd, cmd, arg);
|
||||
return do_usbdevfs_bulk(fd, cmd, argp);
|
||||
case USBDEVFS_DISCSIGNAL32:
|
||||
return do_usbdevfs_discsignal(fd, cmd, arg);
|
||||
return do_usbdevfs_discsignal(fd, cmd, argp);
|
||||
/* i2c */
|
||||
case I2C_FUNCS:
|
||||
return w_long(fd, cmd, arg);
|
||||
return w_long(fd, cmd, argp);
|
||||
case I2C_RDWR:
|
||||
return do_i2c_rdwr_ioctl(fd, cmd, arg);
|
||||
return do_i2c_rdwr_ioctl(fd, cmd, argp);
|
||||
case I2C_SMBUS:
|
||||
return do_i2c_smbus_ioctl(fd, cmd, arg);
|
||||
return do_i2c_smbus_ioctl(fd, cmd, argp);
|
||||
/* Not implemented in the native kernel */
|
||||
case RTC_IRQP_READ32:
|
||||
case RTC_IRQP_SET32:
|
||||
case RTC_EPOCH_READ32:
|
||||
case RTC_EPOCH_SET32:
|
||||
return rtc_ioctl(fd, cmd, arg);
|
||||
return rtc_ioctl(fd, cmd, argp);
|
||||
|
||||
/* dvb */
|
||||
case VIDEO_GET_EVENT:
|
||||
return do_video_get_event(fd, cmd, arg);
|
||||
return do_video_get_event(fd, cmd, argp);
|
||||
case VIDEO_STILLPICTURE:
|
||||
return do_video_stillpicture(fd, cmd, arg);
|
||||
return do_video_stillpicture(fd, cmd, argp);
|
||||
case VIDEO_SET_SPU_PALETTE:
|
||||
return do_video_set_spu_palette(fd, cmd, arg);
|
||||
return do_video_set_spu_palette(fd, cmd, argp);
|
||||
|
||||
/* lp */
|
||||
case LPSETTIMEOUT:
|
||||
return lp_timeout_trans(fd, cmd, arg);
|
||||
return lp_timeout_trans(fd, cmd, argp);
|
||||
}
|
||||
|
||||
/*
|
||||
|
|
@ -1907,7 +1862,7 @@ asmlinkage long compat_sys_ioctl(unsigned int fd, unsigned int cmd,
|
|||
#if defined(CONFIG_IA64) || defined(CONFIG_X86_64)
|
||||
case FS_IOC_RESVSP_32:
|
||||
case FS_IOC_RESVSP64_32:
|
||||
error = compat_ioctl_preallocate(filp, arg);
|
||||
error = compat_ioctl_preallocate(filp, compat_ptr(arg));
|
||||
goto out_fput;
|
||||
#else
|
||||
case FS_IOC_RESVSP:
|
||||
|
|
|
|||
Загрузка…
Ссылка в новой задаче