From 4aa0d037a6c8e6b37ecfd986a444f83190c32a21 Mon Sep 17 00:00:00 2001 From: Jean-Francois Moine Date: Sun, 4 May 2008 06:46:21 -0300 Subject: [PATCH] V4L/DVB (8154): Fix protection problems in the main driver. - Protect format change when streaming active. - Protect USB exchanges on close. - Set a timeout in frame wait. - Have only one capture file and free the resources when closing this file. - Simplify the URB buffer. - Don't reset the control values at open time in pac207. - Fix compilation warnings of stk014. Signed-off-by: Jean-Francois Moine Signed-off-by: Mauro Carvalho Chehab --- drivers/media/video/gspca/gspca.c | 163 +++++++++++++++++------------ drivers/media/video/gspca/gspca.h | 16 ++- drivers/media/video/gspca/pac207.c | 11 +- drivers/media/video/gspca/stk014.c | 7 +- 4 files changed, 113 insertions(+), 84 deletions(-) diff --git a/drivers/media/video/gspca/gspca.c b/drivers/media/video/gspca/gspca.c index c4735e1336..04dbaba4b7 100644 --- a/drivers/media/video/gspca/gspca.c +++ b/drivers/media/video/gspca/gspca.c @@ -39,8 +39,8 @@ MODULE_AUTHOR("Jean-Francois Moine "); MODULE_DESCRIPTION("GSPCA USB Camera Driver"); MODULE_LICENSE("GPL"); -#define DRIVER_VERSION_NUMBER KERNEL_VERSION(0, 0, 30) -static const char version[] = "0.0.30"; +#define DRIVER_VERSION_NUMBER KERNEL_VERSION(0, 1, 1) +static const char version[] = "0.1.1"; static int video_nr = -1; @@ -346,22 +346,17 @@ static int gspca_kill_transfer(struct gspca_dev *gspca_dev) PDEBUG(D_STREAM, "kill transfer"); for (i = 0; i < NURBS; ++i) { - urb = gspca_dev->pktbuf[i].urb; + urb = gspca_dev->urb[i]; if (urb == NULL) continue; - gspca_dev->pktbuf[i].urb = NULL; + gspca_dev->urb[i] = NULL; usb_kill_urb(urb); - - /* urb->transfer_buffer_length is not touched by USB core, - * so we can use it here as the buffer length */ - if (gspca_dev->pktbuf[i].data) { + if (urb->transfer_buffer != 0) usb_buffer_free(gspca_dev->dev, urb->transfer_buffer_length, - gspca_dev->pktbuf[i].data, + urb->transfer_buffer, urb->transfer_dma); - gspca_dev->pktbuf[i].data = NULL; - } usb_free_urb(urb); } return 0; @@ -460,25 +455,25 @@ static int create_urbs(struct gspca_dev *gspca_dev, err("usb_alloc_urb failed"); return -ENOMEM; } - gspca_dev->pktbuf[n].data = usb_buffer_alloc(gspca_dev->dev, + urb->transfer_buffer = usb_buffer_alloc(gspca_dev->dev, bsize, GFP_KERNEL, &urb->transfer_dma); - if (gspca_dev->pktbuf[n].data == NULL) { + if (urb->transfer_buffer == NULL) { usb_free_urb(urb); gspca_kill_transfer(gspca_dev); err("usb_buffer_urb failed"); return -ENOMEM; } - gspca_dev->pktbuf[n].urb = urb; + gspca_dev->urb[n] = urb; urb->dev = gspca_dev->dev; urb->context = gspca_dev; urb->pipe = usb_rcvisocpipe(gspca_dev->dev, ep->desc.bEndpointAddress); - urb->transfer_flags = URB_ISO_ASAP | URB_NO_TRANSFER_DMA_MAP; + urb->transfer_flags = URB_ISO_ASAP + | URB_NO_TRANSFER_DMA_MAP; urb->interval = ep->desc.bInterval; - urb->transfer_buffer = gspca_dev->pktbuf[n].data; urb->complete = isoc_irq; urb->number_of_packets = npkt; urb->transfer_buffer_length = bsize; @@ -523,8 +518,7 @@ static int gspca_init_transfer(struct gspca_dev *gspca_dev) /* submit the URBs */ for (n = 0; n < NURBS; n++) { - ret = usb_submit_urb(gspca_dev->pktbuf[n].urb, - GFP_KERNEL); + ret = usb_submit_urb(gspca_dev->urb[n], GFP_KERNEL); if (ret < 0) { PDEBUG(D_ERR|D_STREAM, "usb_submit_urb [%d] err %d", n, ret); @@ -732,15 +726,13 @@ static int vidioc_g_fmt_cap(struct file *file, void *priv, return 0; } -static int try_fmt_cap(struct file *file, - void *priv, +static int try_fmt_cap(struct gspca_dev *gspca_dev, struct v4l2_format *fmt) { - struct gspca_dev *gspca_dev = priv; int w, h, mode, mode2, frsz; - w = (int) fmt->fmt.pix.width; - h = (int) fmt->fmt.pix.height; + w = fmt->fmt.pix.width; + h = fmt->fmt.pix.height; #ifdef GSPCA_DEBUG if (gspca_debug & D_CONF) PDEBUG_MODE("try fmt cap", fmt->fmt.pix.pixelformat, w, h); @@ -786,9 +778,10 @@ static int vidioc_try_fmt_cap(struct file *file, void *priv, struct v4l2_format *fmt) { + struct gspca_dev *gspca_dev = priv; int ret; - ret = try_fmt_cap(file, priv, fmt); + ret = try_fmt_cap(gspca_dev, fmt); if (ret < 0) return ret; return 0; @@ -809,14 +802,19 @@ static int vidioc_s_fmt_cap(struct file *file, void *priv, #endif if (mutex_lock_interruptible(&gspca_dev->queue_lock)) return -ERESTARTSYS; - ret = try_fmt_cap(file, priv, fmt); + ret = try_fmt_cap(gspca_dev, fmt); if (ret < 0) goto out; if (ret == gspca_dev->curr_mode) goto out; /* same mode */ was_streaming = gspca_dev->streaming; - if (was_streaming != 0) { + if (was_streaming) { + if (gspca_dev->capt_file != 0 + && gspca_dev->capt_file != file) { + ret = -EBUSY; + goto out; + } if (mutex_lock_interruptible(&gspca_dev->usb_lock)) { ret = -ERESTARTSYS; goto out; @@ -824,8 +822,8 @@ static int vidioc_s_fmt_cap(struct file *file, void *priv, gspca_stream_off(gspca_dev); mutex_unlock(&gspca_dev->usb_lock); } - gspca_dev->width = (int) fmt->fmt.pix.width; - gspca_dev->height = (int) fmt->fmt.pix.height; + gspca_dev->width = fmt->fmt.pix.width; + gspca_dev->height = fmt->fmt.pix.height; gspca_dev->pixfmt = fmt->fmt.pix.pixelformat; gspca_dev->curr_mode = ret; if (was_streaming) @@ -891,17 +889,18 @@ static int dev_close(struct inode *inode, struct file *file) if (mutex_lock_interruptible(&gspca_dev->queue_lock)) return -ERESTARTSYS; gspca_dev->users--; - if (gspca_dev->users > 0) { - mutex_unlock(&gspca_dev->queue_lock); - return 0; - } - if (gspca_dev->streaming) - gspca_stream_off(gspca_dev); - gspca_dev->sd_desc->close(gspca_dev); - - frame_free(gspca_dev); - file->private_data = NULL; + /* if the file did capture, free the streaming resources */ + if (gspca_dev->capt_file == file) { + mutex_lock(&gspca_dev->usb_lock); + if (gspca_dev->streaming) + gspca_stream_off(gspca_dev); + gspca_dev->sd_desc->close(gspca_dev); + mutex_unlock(&gspca_dev->usb_lock); + frame_free(gspca_dev); + file->private_data = NULL; + gspca_dev->capt_file = 0; + } mutex_unlock(&gspca_dev->queue_lock); PDEBUG(D_STREAM, "closed"); return 0; @@ -1052,12 +1051,19 @@ static int vidioc_reqbufs(struct file *file, void *priv, return frsz; if (mutex_lock_interruptible(&gspca_dev->queue_lock)) return -ERESTARTSYS; + if (gspca_dev->capt_file != 0) { /* only one file may do capture */ + ret = -EBUSY; + goto out; + } ret = frame_alloc(gspca_dev, rb->count, (unsigned int) frsz, rb->memory); - if (ret == 0) + if (ret == 0) { rb->count = gspca_dev->nframes; + gspca_dev->capt_file = file; + } +out: mutex_unlock(&gspca_dev->queue_lock); PDEBUG(D_STREAM, "reqbufs st:%d c:%d", ret, rb->count); return ret; @@ -1099,6 +1105,10 @@ static int vidioc_streamon(struct file *file, void *priv, ret = -EINVAL; goto out; } + if (gspca_dev->capt_file != file) { + ret = -EINVAL; + goto out; + } if (!gspca_dev->streaming) { ret = gspca_init_transfer(gspca_dev); if (ret < 0) @@ -1122,22 +1132,30 @@ static int vidioc_streamoff(struct file *file, void *priv, enum v4l2_buf_type buf_type) { struct gspca_dev *gspca_dev = priv; + int ret; PDEBUG(D_STREAM, "stream off"); if (buf_type != V4L2_BUF_TYPE_VIDEO_CAPTURE) return -EINVAL; - if (gspca_dev->streaming) { - if (mutex_lock_interruptible(&gspca_dev->queue_lock)) - return -ERESTARTSYS; - if (mutex_lock_interruptible(&gspca_dev->usb_lock)) { - mutex_unlock(&gspca_dev->queue_lock); - return -ERESTARTSYS; - } - gspca_stream_off(gspca_dev); - mutex_unlock(&gspca_dev->usb_lock); - mutex_unlock(&gspca_dev->queue_lock); + if (!gspca_dev->streaming) + return 0; + if (mutex_lock_interruptible(&gspca_dev->queue_lock)) + return -ERESTARTSYS; + if (mutex_lock_interruptible(&gspca_dev->usb_lock)) { + ret = -ERESTARTSYS; + goto out; } - return 0; + if (gspca_dev->capt_file != file) { + ret = -EINVAL; + goto out2; + } + gspca_stream_off(gspca_dev); + ret = 0; +out2: + mutex_unlock(&gspca_dev->usb_lock); +out: + mutex_unlock(&gspca_dev->queue_lock); + return ret; } static int vidioc_g_jpegcomp(struct file *file, void *priv, @@ -1187,14 +1205,11 @@ static int vidioc_s_parm(struct file *filp, void *priv, struct gspca_dev *gspca_dev = priv; int n; - if (mutex_lock_interruptible(&gspca_dev->usb_lock)) - return -ERESTARTSYS; n = parm->parm.capture.readbuffers; if (n == 0 || n > GSPCA_MAX_FRAMES) parm->parm.capture.readbuffers = gspca_dev->nbufread; else gspca_dev->nbufread = n; - mutex_unlock(&gspca_dev->usb_lock); return 0; } @@ -1245,7 +1260,11 @@ static int dev_mmap(struct file *file, struct vm_area_struct *vma) return -ERESTARTSYS; if (!gspca_dev->present) { ret = -ENODEV; - goto done; + goto out; + } + if (gspca_dev->capt_file != file) { + ret = -EINVAL; + goto out; } for (i = 0; i < gspca_dev->nframes; ++i) { @@ -1262,7 +1281,7 @@ static int dev_mmap(struct file *file, struct vm_area_struct *vma) if (frame == 0) { PDEBUG(D_STREAM, "mmap no frame buffer found"); ret = -EINVAL; - goto done; + goto out; } #ifdef CONFIG_VIDEO_V4L1_COMPAT if (i == 0 && size == frame->v4l2_buf.length * gspca_dev->nframes) @@ -1272,7 +1291,7 @@ static int dev_mmap(struct file *file, struct vm_area_struct *vma) if (size != frame->v4l2_buf.length) { PDEBUG(D_STREAM, "mmap bad size"); ret = -EINVAL; - goto done; + goto out; } /* @@ -1286,7 +1305,7 @@ static int dev_mmap(struct file *file, struct vm_area_struct *vma) page = vmalloc_to_page((void *) addr); ret = vm_insert_page(vma, start, page); if (ret < 0) - goto done; + goto out; start += PAGE_SIZE; addr += PAGE_SIZE; size -= PAGE_SIZE; @@ -1304,7 +1323,7 @@ static int dev_mmap(struct file *file, struct vm_area_struct *vma) } #endif ret = 0; -done: +out: mutex_unlock(&gspca_dev->queue_lock); return ret; } @@ -1356,10 +1375,14 @@ static int gspca_frame_wait(struct gspca_dev *gspca_dev, /* wait till a frame is ready */ for (;;) { - ret = wait_event_interruptible(gspca_dev->wq, - atomic_read(&gspca_dev->nevent) > 0); - if (ret != 0) - return ret; + ret = wait_event_interruptible_timeout(gspca_dev->wq, + atomic_read(&gspca_dev->nevent) > 0, + msecs_to_jiffies(3000)); + if (ret <= 0) { + if (ret < 0) + return ret; + return -EIO; + } if (!gspca_dev->streaming || !gspca_dev->present) return -EIO; i = gspca_dev->fr_o; @@ -1402,6 +1425,10 @@ static int vidioc_dqbuf(struct file *file, void *priv, return -EINVAL; if (!gspca_dev->streaming) return -EINVAL; + if (gspca_dev->capt_file != file) { + ret = -EINVAL; + goto out; + } /* only one read */ if (mutex_lock_interruptible(&gspca_dev->read_lock)) @@ -1409,14 +1436,14 @@ static int vidioc_dqbuf(struct file *file, void *priv, ret = gspca_frame_wait(gspca_dev, file->f_flags & O_NONBLOCK); if (ret < 0) - goto done; + goto out; i = ret; /* frame index */ frame = &gspca_dev->frame[i]; frame->v4l2_buf.flags &= ~V4L2_BUF_FLAG_DONE; memcpy(v4l2_buf, &frame->v4l2_buf, sizeof *v4l2_buf); PDEBUG(D_FRAM, "dqbuf %d", i); ret = 0; -done: +out: mutex_unlock(&gspca_dev->read_lock); return ret; } @@ -1450,6 +1477,8 @@ static int vidioc_qbuf(struct file *file, void *priv, PDEBUG(D_STREAM, "qbuf bad memory type"); return -EINVAL; } + if (gspca_dev->capt_file != file) + return -EINVAL; if (mutex_lock_interruptible(&gspca_dev->queue_lock)) return -ERESTARTSYS; @@ -1524,7 +1553,9 @@ static ssize_t dev_read(struct file *file, char __user *data, return ret; } } - } + } else if (gspca_dev->capt_file != file) + return -EINVAL; + if (!gspca_dev->streaming) { ret = vidioc_streamon(file, gspca_dev, V4L2_BUF_TYPE_VIDEO_CAPTURE); @@ -1719,7 +1750,7 @@ EXPORT_SYMBOL(gspca_dev_probe); */ void gspca_disconnect(struct usb_interface *intf) { - struct gspca_dev *gspca_dev = usb_get_intfdata(intf); + struct gspca_dev *gspca_dev = usb_get_intfdata(intf); if (!gspca_dev) return; diff --git a/drivers/media/video/gspca/gspca.h b/drivers/media/video/gspca/gspca.h index 3bfb3641cf..c2618c0e66 100644 --- a/drivers/media/video/gspca/gspca.h +++ b/drivers/media/video/gspca/gspca.h @@ -108,11 +108,6 @@ struct sd_desc { cam_qmnu_op querymenu; }; -struct gspca_pktbuf { - char *data; - struct urb *urb; -}; - /* packet types when moving from iso buf to frame buf */ #define DISCARD_PACKET 0 #define FIRST_PACKET 1 @@ -121,19 +116,20 @@ struct gspca_pktbuf { struct gspca_frame { unsigned char *data; /* frame buffer */ - unsigned char *data_end; /* current end of frame while filling */ + unsigned char *data_end; /* end of frame while filling */ int vma_use_count; struct v4l2_buffer v4l2_buf; }; struct gspca_dev { - struct video_device vdev; /* !! must be the first item */ + struct video_device vdev; /* !! must be the first item */ struct usb_device *dev; + struct file *capt_file; /* file doing video capture */ struct cam cam; /* device information */ const struct sd_desc *sd_desc; /* subdriver description */ - struct gspca_pktbuf pktbuf[NURBS]; + struct urb *urb[NURBS]; __u8 *frbuf; /* buffer for nframes */ struct gspca_frame frame[GSPCA_MAX_FRAMES]; @@ -147,7 +143,7 @@ struct gspca_dev { __u8 iface; /* USB interface number */ __u8 alt; /* USB alternate setting */ - char curr_mode; /* current camera mode */ + unsigned char curr_mode; /* current camera mode */ __u32 pixfmt; /* current mode parameters */ short width; short height; @@ -158,7 +154,7 @@ struct gspca_dev { struct mutex read_lock; /* read protection */ struct mutex queue_lock; /* ISOC queue protection */ __u32 sequence; /* frame sequence number */ - signed char streaming; + char streaming; char users; /* # open */ char present; /* device connected */ char nbufread; /* number of buffers for read() */ diff --git a/drivers/media/video/gspca/pac207.c b/drivers/media/video/gspca/pac207.c index ac16c73528..57d48f51e3 100644 --- a/drivers/media/video/gspca/pac207.c +++ b/drivers/media/video/gspca/pac207.c @@ -27,8 +27,8 @@ #include "gspca.h" -#define DRIVER_VERSION_NUMBER KERNEL_VERSION(0, 0, 30) -static const char version[] = "0.0.30"; +#define DRIVER_VERSION_NUMBER KERNEL_VERSION(0, 1, 1) +static const char version[] = "0.1.1"; MODULE_AUTHOR("Hans de Goede "); MODULE_DESCRIPTION("Pixart PAC207"); @@ -251,6 +251,7 @@ int pac207_read_reg(struct gspca_dev *gspca_dev, u16 index) static int sd_config(struct gspca_dev *gspca_dev, const struct usb_device_id *id) { + struct sd *sd = (struct sd *) gspca_dev; struct cam *cam; u8 idreg[2]; @@ -282,6 +283,9 @@ static int sd_config(struct gspca_dev *gspca_dev, cam->epaddr = 0x05; cam->cam_mode = sif_mode; cam->nmodes = ARRAY_SIZE(sif_mode); + sd->brightness = PAC207_BRIGHTNESS_DEFAULT; + sd->exposure = PAC207_EXPOSURE_DEFAULT; + sd->gain = PAC207_GAIN_DEFAULT; return 0; } @@ -291,9 +295,6 @@ static int sd_open(struct gspca_dev *gspca_dev) { struct sd *sd = (struct sd *) gspca_dev; - sd->brightness = PAC207_BRIGHTNESS_DEFAULT; - sd->exposure = PAC207_EXPOSURE_DEFAULT; - sd->gain = PAC207_GAIN_DEFAULT; sd->autogain = 1; return 0; diff --git a/drivers/media/video/gspca/stk014.c b/drivers/media/video/gspca/stk014.c index 8fd4ff0136..2e4cf64442 100644 --- a/drivers/media/video/gspca/stk014.c +++ b/drivers/media/video/gspca/stk014.c @@ -24,8 +24,8 @@ #include "gspca.h" #include "jpeg.h" -#define DRIVER_VERSION_NUMBER KERNEL_VERSION(0, 0, 22) -static const char version[] = "0.0.22"; +#define DRIVER_VERSION_NUMBER KERNEL_VERSION(0, 1, 0) +static const char version[] = "0.1.0"; MODULE_AUTHOR("Jean-Francois Moine "); MODULE_DESCRIPTION("Syntek DV4000 (STK014) USB Camera Driver"); @@ -390,6 +390,7 @@ static void sd_pkt_scan(struct gspca_dev *gspca_dev, int len) /* iso packet length */ { int l; + static unsigned char ffd9[] = {0xff, 0xd9}; /* a frame starts with: * - 0xff 0xfe @@ -445,7 +446,7 @@ static void sd_pkt_scan(struct gspca_dev *gspca_dev, if (len > frame->v4l2_buf.bytesused - 2 - l) len = frame->v4l2_buf.bytesused - 2 - l; gspca_frame_add(gspca_dev, INTER_PACKET, frame, data, len); - gspca_frame_add(gspca_dev, LAST_PACKET, frame, "\xff\xd9", 2); + gspca_frame_add(gspca_dev, LAST_PACKET, frame, ffd9, 2); } static int sd_setbrightness(struct gspca_dev *gspca_dev, __s32 val) -- 2.39.5