diff options
| -rw-r--r-- | tools/lguest/lguest.c | 206 |
1 files changed, 105 insertions, 101 deletions
diff --git a/tools/lguest/lguest.c b/tools/lguest/lguest.c index 70ee62a..eebe94b 100644 --- a/tools/lguest/lguest.c +++ b/tools/lguest/lguest.c @@ -252,6 +252,16 @@ static struct termios orig_term; #define le32_to_cpu(v32) (v32) #define le64_to_cpu(v64) (v64) +/* + * A real device would ignore weird/non-compliant driver behaviour. We + * stop and flag it, to help debugging Linux problems. + */ +#define bad_driver(d, fmt, ...) \ + errx(1, "%s: bad driver: " fmt, (d)->name, ## __VA_ARGS__) +#define bad_driver_vq(vq, fmt, ...) \ + errx(1, "%s vq %s: bad driver: " fmt, (vq)->dev->name, \ + vq->name, ## __VA_ARGS__) + /* Is this iovec empty? */ static bool iov_empty(const struct iovec iov[], unsigned int num_iov) { @@ -264,7 +274,8 @@ static bool iov_empty(const struct iovec iov[], unsigned int num_iov) } /* Take len bytes from the front of this iovec. */ -static void iov_consume(struct iovec iov[], unsigned num_iov, +static void iov_consume(struct device *d, + struct iovec iov[], unsigned num_iov, void *dest, unsigned len) { unsigned int i; @@ -282,7 +293,7 @@ static void iov_consume(struct iovec iov[], unsigned num_iov, len -= used; } if (len != 0) - errx(1, "iovec too short!"); + bad_driver(d, "iovec too short!"); } /*L:100 @@ -618,7 +629,8 @@ static void tell_kernel(unsigned long start) * we have a convenient routine which checks it and exits with an error message * if something funny is going on: */ -static void *_check_pointer(unsigned long addr, unsigned int size, +static void *_check_pointer(struct device *d, + unsigned long addr, unsigned int size, unsigned int line) { /* @@ -626,7 +638,8 @@ static void *_check_pointer(unsigned long addr, unsigned int size, * or addr + size wraps around. */ if ((addr + size) > guest_limit || (addr + size) < addr) - errx(1, "%s:%i: Invalid address %#lx", __FILE__, line, addr); + bad_driver(d, "%s:%i: Invalid address %#lx", + __FILE__, line, addr); /* * We return a pointer for the caller's convenience, now we know it's * safe to use. @@ -634,14 +647,14 @@ static void *_check_pointer(unsigned long addr, unsigned int size, return from_guest_phys(addr); } /* A macro which transparently hands the line number to the real function. */ -#define check_pointer(addr,size) _check_pointer(addr, size, __LINE__) +#define check_pointer(d,addr,size) _check_pointer(d, addr, size, __LINE__) /* * Each buffer in the virtqueues is actually a chain of descriptors. This * function returns the next descriptor in the chain, or vq->vring.num if we're * at the end. */ -static unsigned next_desc(struct vring_desc *desc, +static unsigned next_desc(struct device *d, struct vring_desc *desc, unsigned int i, unsigned int max) { unsigned int next; @@ -656,7 +669,7 @@ static unsigned next_desc(struct vring_desc *desc, wmb(); if (next >= max) - errx(1, "Desc next is %u", next); + bad_driver(d, "Desc next is %u", next); return next; } @@ -681,8 +694,7 @@ static void trigger_irq(struct virtqueue *vq) * The driver MUST set flags to 0 or 1. */ if (vq->vring.avail->flags > 1) - errx(1, "%s: avail->flags = %u\n", - vq->dev->name, vq->vring.avail->flags); + bad_driver_vq(vq, "avail->flags = %u\n", vq->vring.avail->flags); /* * 2.4.7.2: @@ -769,8 +781,8 @@ static unsigned wait_for_vq_desc(struct virtqueue *vq, /* Check it isn't doing very strange things with descriptor numbers. */ if ((u16)(vq->vring.avail->idx - last_avail) > vq->vring.num) - errx(1, "Guest moved used index from %u to %u", - last_avail, vq->vring.avail->idx); + bad_driver_vq(vq, "Guest moved used index from %u to %u", + last_avail, vq->vring.avail->idx); /* * Make sure we read the descriptor number *after* we read the ring @@ -787,7 +799,7 @@ static unsigned wait_for_vq_desc(struct virtqueue *vq, /* If their number is silly, that's a fatal mistake. */ if (head >= vq->vring.num) - errx(1, "Guest says index %u is available", head); + bad_driver_vq(vq, "Guest says index %u is available", head); /* When we start there are none of either input nor output. */ *out_num = *in_num = 0; @@ -817,8 +829,7 @@ static unsigned wait_for_vq_desc(struct virtqueue *vq, */ if (!(vq->dev->features_accepted & (1<<VIRTIO_RING_F_INDIRECT_DESC))) - errx(1, "%s: vq indirect not negotiated", - vq->dev->name); + bad_driver_vq(vq, "vq indirect not negotiated"); /* * 2.4.5.3.1: @@ -828,8 +839,7 @@ static unsigned wait_for_vq_desc(struct virtqueue *vq, * table per descriptor). */ if (desc != vq->vring.desc) - errx(1, "%s: Indirect within indirect", - vq->dev->name); + bad_driver_vq(vq, "Indirect within indirect"); /* * Proposed update VIRTIO-134 spells this out: @@ -838,11 +848,11 @@ static unsigned wait_for_vq_desc(struct virtqueue *vq, * and VIRTQ_DESC_F_NEXT in flags. */ if (desc[i].flags & VRING_DESC_F_NEXT) - errx(1, "%s: indirect and next together", - vq->dev->name); + bad_driver_vq(vq, "indirect and next together"); if (desc[i].len % sizeof(struct vring_desc)) - errx(1, "Invalid size for indirect buffer table"); + bad_driver_vq(vq, + "Invalid size for indirect table"); /* * 2.4.5.3.2: * @@ -854,7 +864,7 @@ static unsigned wait_for_vq_desc(struct virtqueue *vq, */ max = desc[i].len / sizeof(struct vring_desc); - desc = check_pointer(desc[i].addr, desc[i].len); + desc = check_pointer(vq->dev, desc[i].addr, desc[i].len); i = 0; /* 2.4.5.3.1: @@ -863,14 +873,14 @@ static unsigned wait_for_vq_desc(struct virtqueue *vq, * than the Queue Size of the device. */ if (max > vq->pci_config.queue_size) - errx(1, "%s: indirect has too many entries", - vq->dev->name); + bad_driver_vq(vq, + "indirect has too many entries"); } /* Grab the first descriptor, and check it's OK. */ iov[*out_num + *in_num].iov_len = desc[i].len; iov[*out_num + *in_num].iov_base - = check_pointer(desc[i].addr, desc[i].len); + = check_pointer(vq->dev, desc[i].addr, desc[i].len); /* If this is an input descriptor, increment that count. */ if (desc[i].flags & VRING_DESC_F_WRITE) (*in_num)++; @@ -880,14 +890,15 @@ static unsigned wait_for_vq_desc(struct virtqueue *vq, * to come before any input descriptors. */ if (*in_num) - errx(1, "Descriptor has out after in"); + bad_driver_vq(vq, + "Descriptor has out after in"); (*out_num)++; } /* If we've got too many, that implies a descriptor loop. */ if (*out_num + *in_num > max) - errx(1, "Looped descriptor"); - } while ((i = next_desc(desc, i, max)) != max); + bad_driver_vq(vq, "Looped descriptor"); + } while ((i = next_desc(vq->dev, desc, i, max)) != max); return head; } @@ -944,7 +955,7 @@ static void console_input(struct virtqueue *vq) /* Make sure there's a descriptor available. */ head = wait_for_vq_desc(vq, iov, &out_num, &in_num); if (out_num) - errx(1, "Output buffers in console in queue?"); + bad_driver_vq(vq, "Output buffers in console in queue?"); /* Read into it. This is where we usually wait. */ len = readv(STDIN_FILENO, iov, in_num); @@ -997,7 +1008,7 @@ static void console_output(struct virtqueue *vq) /* We usually wait in here, for the Guest to give us something. */ head = wait_for_vq_desc(vq, iov, &out, &in); if (in) - errx(1, "Input buffers in console output queue?"); + bad_driver_vq(vq, "Input buffers in console output queue?"); /* writev can return a partial write, so we loop here. */ while (!iov_empty(iov, out)) { @@ -1006,7 +1017,7 @@ static void console_output(struct virtqueue *vq) warn("Write to stdout gave %i (%d)", len, errno); break; } - iov_consume(iov, out, NULL, len); + iov_consume(vq->dev, iov, out, NULL, len); } /* @@ -1035,7 +1046,7 @@ static void net_output(struct virtqueue *vq) /* We usually wait in here for the Guest to give us a packet. */ head = wait_for_vq_desc(vq, iov, &out, &in); if (in) - errx(1, "Input buffers in net output queue?"); + bad_driver_vq(vq, "Input buffers in net output queue?"); /* * Send the whole thing through to /dev/net/tun. It expects the exact * same format: what a coincidence! @@ -1083,7 +1094,7 @@ static void net_input(struct virtqueue *vq) */ head = wait_for_vq_desc(vq, iov, &out, &in); if (out) - errx(1, "Output buffers in net input queue?"); + bad_driver_vq(vq, "Output buffers in net input queue?"); /* * If it looks like we'll block reading from the tun device, send them @@ -1466,7 +1477,8 @@ static void pci_data_ioread(u16 port, u32 mask, u32 *val) */ /* Must be bar 0 */ if (!valid_bar_access(d, &d->config.cfg_access)) - errx(1, "Invalid cfg_access to bar%u, offset %u len %u", + bad_driver(d, + "Invalid cfg_access to bar%u, offset %u len %u", d->config.cfg_access.cap.bar, d->config.cfg_access.cap.offset, d->config.cfg_access.cap.length); @@ -1785,7 +1797,7 @@ static void check_virtqueue(struct device *d, struct virtqueue *vq) if (vq->pci_config.queue_desc_hi || vq->pci_config.queue_avail_hi || vq->pci_config.queue_used_hi) - errx(1, "%s: invalid 64-bit queue address", d->name); + bad_driver_vq(vq, "invalid 64-bit queue address"); /* * 2.4.1: @@ -1797,17 +1809,20 @@ static void check_virtqueue(struct device *d, struct virtqueue *vq) if (vq->pci_config.queue_desc_lo % 16 || vq->pci_config.queue_avail_lo % 2 || vq->pci_config.queue_used_lo % 4) - errx(1, "%s: invalid alignment in queue addresses", d->name); + bad_driver_vq(vq, "invalid alignment in queue addresses"); /* Initialize the virtqueue and check they're all in range. */ vq->vring.num = vq->pci_config.queue_size; - vq->vring.desc = check_pointer(vq->pci_config.queue_desc_lo, + vq->vring.desc = check_pointer(vq->dev, + vq->pci_config.queue_desc_lo, sizeof(*vq->vring.desc) * vq->vring.num); - vq->vring.avail = check_pointer(vq->pci_config.queue_avail_lo, + vq->vring.avail = check_pointer(vq->dev, + vq->pci_config.queue_avail_lo, sizeof(*vq->vring.avail) + (sizeof(vq->vring.avail->ring[0]) * vq->vring.num)); - vq->vring.used = check_pointer(vq->pci_config.queue_used_lo, + vq->vring.used = check_pointer(vq->dev, + vq->pci_config.queue_used_lo, sizeof(*vq->vring.used) + (sizeof(vq->vring.used->ring[0]) * vq->vring.num)); @@ -1819,8 +1834,8 @@ static void check_virtqueue(struct device *d, struct virtqueue *vq) * when allocating the used ring. */ if (vq->vring.used->flags != 0) - errx(1, "%s: invalid initial used.flags %#x", - d->name, vq->vring.used->flags); + bad_driver_vq(vq, "invalid initial used.flags %#x", + vq->vring.used->flags); } static void start_virtqueue(struct virtqueue *vq) @@ -1877,8 +1892,7 @@ static void emulate_mmio_write(struct device *d, u32 off, u32 val, u32 mask) goto feature_write_through32; case offsetof(struct virtio_pci_mmio, cfg.guest_feature_select): if (val > 1) - errx(1, "%s: Unexpected driver select %u", - d->name, val); + bad_driver(d, "Unexpected driver select %u", val); goto feature_write_through32; case offsetof(struct virtio_pci_mmio, cfg.guest_feature): if (d->mmio->cfg.guest_feature_select == 0) { @@ -1896,8 +1910,8 @@ static void emulate_mmio_write(struct device *d, u32 off, u32 val, u32 mask) * not offer */ if (d->features_accepted & ~d->features) - errx(1, "%s: over-accepted features %#llx of %#llx", - d->name, d->features_accepted, d->features); + bad_driver(d, "over-accepted features %#llx of %#llx", + d->features_accepted, d->features); goto feature_write_through32; case offsetof(struct virtio_pci_mmio, cfg.device_status): { u8 prev; @@ -1916,8 +1930,8 @@ static void emulate_mmio_write(struct device *d, u32 off, u32 val, u32 mask) /* 2.1.1: The driver MUST NOT clear a device status bit. */ if (d->mmio->cfg.device_status & ~val) - errx(1, "%s: unset of device status bit %#x -> %#x", - d->name, d->mmio->cfg.device_status, val); + bad_driver(d, "unset of device status bit %#x -> %#x", + d->mmio->cfg.device_status, val); /* * 2.1.2: @@ -1970,12 +1984,12 @@ static void emulate_mmio_write(struct device *d, u32 off, u32 val, u32 mask) case VIRTIO_CONFIG_S_ACKNOWLEDGE: break; default: - errx(1, "%s: unknown device status bit %#x -> %#x", - d->name, d->mmio->cfg.device_status, val); + bad_driver(d, "unknown device status bit %#x -> %#x", + d->mmio->cfg.device_status, val); } if (d->mmio->cfg.device_status != prev) - errx(1, "%s: unexpected status transition %#x -> %#x", - d->name, d->mmio->cfg.device_status, val); + bad_driver(d, "unexpected status transition %#x -> %#x", + d->mmio->cfg.device_status, val); /* If they just wrote FEATURES_OK, we make sure they read */ switch (val & ~d->mmio->cfg.device_status) { @@ -1984,8 +1998,7 @@ static void emulate_mmio_write(struct device *d, u32 off, u32 val, u32 mask) break; case VIRTIO_CONFIG_S_DRIVER_OK: if (d->wrote_features_ok) - errx(1, "%s: did not re-read FEATURES_OK", - d->name); + bad_driver(d, "did not re-read FEATURES_OK"); break; } goto write_through8; @@ -2017,14 +2030,12 @@ static void emulate_mmio_write(struct device *d, u32 off, u32 val, u32 mask) * to queue_size. */ if (val & (val-1)) - errx(1, "%s: invalid queue size %u\n", d->name, val); + bad_driver(d, "invalid queue size %u", val); if (d->mmio->cfg.queue_enable) - errx(1, "%s: changing queue size on live device", - d->name); + bad_driver(d, "changing queue size on live device"); goto write_through16; case offsetof(struct virtio_pci_mmio, cfg.queue_msix_vector): - errx(1, "%s: attempt to set MSIX vector to %u", - d->name, val); + bad_driver(d, "attempt to set MSIX vector to %u", val); case offsetof(struct virtio_pci_mmio, cfg.queue_enable): { struct virtqueue *vq = vq_by_num(d, d->mmio->cfg.queue_select); @@ -2034,7 +2045,7 @@ static void emulate_mmio_write(struct device *d, u32 off, u32 val, u32 mask) * The driver MUST NOT write a 0 to queue_enable. */ if (val != 1) - errx(1, "%s: setting queue_enable to %u", d->name, val); + bad_driver(d, "setting queue_enable to %u", val); /* * 3.1.1: @@ -2049,7 +2060,7 @@ static void emulate_mmio_write(struct device *d, u32 off, u32 val, u32 mask) * they should have done that before setting DRIVER_OK. */ if (d->mmio->cfg.device_status & VIRTIO_CONFIG_S_DRIVER_OK) - errx(1, "%s: enabling vs after DRIVER_OK", d->name); + bad_driver(d, "enabling vq after DRIVER_OK"); d->mmio->cfg.queue_enable = val; save_vq_config(&d->mmio->cfg, vq); @@ -2057,7 +2068,7 @@ static void emulate_mmio_write(struct device *d, u32 off, u32 val, u32 mask) goto write_through16; } case offsetof(struct virtio_pci_mmio, cfg.queue_notify_off): - errx(1, "%s: attempt to write to queue_notify_off", d->name); + bad_driver(d, "attempt to write to queue_notify_off"); case offsetof(struct virtio_pci_mmio, cfg.queue_desc_lo): case offsetof(struct virtio_pci_mmio, cfg.queue_desc_hi): case offsetof(struct virtio_pci_mmio, cfg.queue_avail_lo): @@ -2071,8 +2082,7 @@ static void emulate_mmio_write(struct device *d, u32 off, u32 val, u32 mask) * enabling the virtqueue with queue_enable. */ if (d->mmio->cfg.queue_enable) - errx(1, "%s: changing queue on live device", - d->name); + bad_driver(d, "changing queue on live device"); /* * 3.1.1: @@ -2083,26 +2093,25 @@ static void emulate_mmio_write(struct device *d, u32 off, u32 val, u32 mask) * accept new feature bits after this step. */ if (!(d->mmio->cfg.device_status & VIRTIO_CONFIG_S_FEATURES_OK)) - errx(1, "%s: enabling vs before FEATURES_OK", d->name); + bad_driver(d, "setting up vq before FEATURES_OK"); /* * 6. Re-read device status to ensure the FEATURES_OK bit is * still set... */ if (d->wrote_features_ok) - errx(1, "%s: didn't re-read FEATURES_OK before setup", - d->name); + bad_driver(d, "didn't re-read FEATURES_OK before setup"); goto write_through32; case offsetof(struct virtio_pci_mmio, notify): vq = vq_by_num(d, val); if (!vq) - errx(1, "Invalid vq notification on %u", val); + bad_driver(d, "Invalid vq notification on %u", val); /* Notify the process handling this vq by adding 1 to eventfd */ write(vq->eventfd, "\1\0\0\0\0\0\0\0", 8); goto write_through16; case offsetof(struct virtio_pci_mmio, isr): - errx(1, "%s: Unexpected write to isr", d->name); + bad_driver(d, "Unexpected write to isr"); /* Weird corner case: write to emerg_wr of console */ case sizeof(struct virtio_pci_mmio) + offsetof(struct virtio_console_config, emerg_wr): @@ -2119,7 +2128,7 @@ static void emulate_mmio_write(struct device *d, u32 off, u32 val, u32 mask) * The driver MUST NOT write to device_feature, num_queues, * config_generation or queue_notify_off. */ - errx(1, "%s: Unexpected write to offset %u", d->name, off); + bad_driver(d, "Unexpected write to offset %u", off); } feature_write_through32: @@ -2138,11 +2147,9 @@ feature_write_through32: * accept new feature bits after this step. */ if (!(d->mmio->cfg.device_status & VIRTIO_CONFIG_S_DRIVER)) - errx(1, "%s: feature write before VIRTIO_CONFIG_S_DRIVER", - d->name); + bad_driver(d, "feature write before VIRTIO_CONFIG_S_DRIVER"); if (d->mmio->cfg.device_status & VIRTIO_CONFIG_S_FEATURES_OK) - errx(1, "%s: feature write after VIRTIO_CONFIG_S_FEATURES_OK", - d->name); + bad_driver(d, "feature write after VIRTIO_CONFIG_S_FEATURES_OK"); /* * 4.1.3.1: @@ -2153,8 +2160,8 @@ feature_write_through32: */ write_through32: if (mask != 0xFFFFFFFF) { - errx(1, "%s: non-32-bit write to offset %u (%#x)", - d->name, off, getreg(eip)); + bad_driver(d, "non-32-bit write to offset %u (%#x)", + off, getreg(eip)); return; } memcpy((char *)d->mmio + off, &val, 4); @@ -2162,15 +2169,15 @@ write_through32: write_through16: if (mask != 0xFFFF) - errx(1, "%s: non-16-bit (%#x) write to offset %u (%#x)", - d->name, mask, off, getreg(eip)); + bad_driver(d, "non-16-bit write to offset %u (%#x)", + off, getreg(eip)); memcpy((char *)d->mmio + off, &val, 2); return; write_through8: if (mask != 0xFF) - errx(1, "%s: non-8-bit write to offset %u (%#x)", - d->name, off, getreg(eip)); + bad_driver(d, "non-8-bit write to offset %u (%#x)", + off, getreg(eip)); memcpy((char *)d->mmio + off, &val, 1); return; } @@ -2197,11 +2204,11 @@ static u32 emulate_mmio_read(struct device *d, u32 off, u32 mask) * to the device. */ if (!(d->mmio->cfg.device_status & VIRTIO_CONFIG_S_DRIVER)) - errx(1, "%s: feature read before VIRTIO_CONFIG_S_DRIVER", - d->name); + bad_driver(d, + "feature read before VIRTIO_CONFIG_S_DRIVER"); goto read_through32; case offsetof(struct virtio_pci_mmio, cfg.msix_config): - errx(1, "%s: read of msix_config", d->name); + bad_driver(d, "read of msix_config"); case offsetof(struct virtio_pci_mmio, cfg.num_queues): goto read_through16; case offsetof(struct virtio_pci_mmio, cfg.device_status): @@ -2229,13 +2236,12 @@ static u32 emulate_mmio_read(struct device *d, u32 off, u32 mask) * DRIVER_OK. */ if (!(d->mmio->cfg.device_status & VIRTIO_CONFIG_S_DRIVER_OK)) - errx(1, "%s: notify before VIRTIO_CONFIG_S_DRIVER_OK", - d->name); + bad_driver(d, "notify before VIRTIO_CONFIG_S_DRIVER_OK"); goto read_through16; case offsetof(struct virtio_pci_mmio, isr): if (mask != 0xFF) - errx(1, "%s: non-8-bit read from offset %u (%#x)", - d->name, off, getreg(eip)); + bad_driver(d, "non-8-bit read from offset %u (%#x)", + off, getreg(eip)); isr = d->mmio->isr; /* * 4.1.4.5.1: @@ -2245,13 +2251,11 @@ static u32 emulate_mmio_read(struct device *d, u32 off, u32 mask) d->mmio->isr = 0; return isr; case offsetof(struct virtio_pci_mmio, padding): - errx(1, "%s: read from padding (%#x)", - d->name, getreg(eip)); + bad_driver(d, "read from padding (%#x)", getreg(eip)); default: /* Read from device config space, beware unaligned overflow */ if (off > d->mmio_size - 4) - errx(1, "%s: read past end (%#x)", - d->name, getreg(eip)); + bad_driver(d, "read past end (%#x)", getreg(eip)); /* * 3.1.1: @@ -2266,8 +2270,8 @@ static u32 emulate_mmio_read(struct device *d, u32 off, u32 mask) * that it can support the device before accepting it. */ if (!(d->mmio->cfg.device_status & VIRTIO_CONFIG_S_DRIVER)) - errx(1, "%s: config read before VIRTIO_CONFIG_S_DRIVER", - d->name); + bad_driver(d, + "config read before VIRTIO_CONFIG_S_DRIVER"); if (mask == 0xFFFFFFFF) goto read_through32; @@ -2286,22 +2290,22 @@ static u32 emulate_mmio_read(struct device *d, u32 off, u32 mask) */ read_through32: if (mask != 0xFFFFFFFF) - errx(1, "%s: non-32-bit read to offset %u (%#x)", - d->name, off, getreg(eip)); + bad_driver(d, "non-32-bit read to offset %u (%#x)", + off, getreg(eip)); memcpy(&val, (char *)d->mmio + off, 4); return val; read_through16: if (mask != 0xFFFF) - errx(1, "%s: non-16-bit read to offset %u (%#x)", - d->name, off, getreg(eip)); + bad_driver(d, "non-16-bit read to offset %u (%#x)", + off, getreg(eip)); memcpy(&val, (char *)d->mmio + off, 2); return val; read_through8: if (mask != 0xFF) - errx(1, "%s: non-8-bit read to offset %u (%#x)", - d->name, off, getreg(eip)); + bad_driver(d, "non-8-bit read to offset %u (%#x)", + off, getreg(eip)); memcpy(&val, (char *)d->mmio + off, 1); return val; } @@ -2943,7 +2947,7 @@ static void blk_request(struct virtqueue *vq) head = wait_for_vq_desc(vq, iov, &out_num, &in_num); /* Copy the output header from the front of the iov (adjusts iov) */ - iov_consume(iov, out_num, &out, sizeof(out)); + iov_consume(vq->dev, iov, out_num, &out, sizeof(out)); /* Find and trim end of iov input array, for our status byte. */ in = NULL; @@ -2955,7 +2959,7 @@ static void blk_request(struct virtqueue *vq) } } if (!in) - errx(1, "Bad virtblk cmd with no room for status"); + bad_driver_vq(vq, "Bad virtblk cmd with no room for status"); /* * For historical reasons, block operations are expressed in 512 byte @@ -2985,7 +2989,7 @@ static void blk_request(struct virtqueue *vq) /* Trim it back to the correct length */ ftruncate64(vblk->fd, vblk->len); /* Die, bad Guest, die. */ - errx(1, "Write past end %llu+%u", off, ret); + bad_driver_vq(vq, "Write past end %llu+%u", off, ret); } wlen = sizeof(*in); @@ -3078,7 +3082,7 @@ static void rng_input(struct virtqueue *vq) /* First we need a buffer from the Guests's virtqueue. */ head = wait_for_vq_desc(vq, iov, &out_num, &in_num); if (out_num) - errx(1, "Output buffers in rng?"); + bad_driver_vq(vq, "Output buffers in rng?"); /* * Just like the console write, we loop to cover the whole iovec. @@ -3088,7 +3092,7 @@ static void rng_input(struct virtqueue *vq) len = readv(rng_info->rfd, iov, in_num); if (len <= 0) err(1, "Read from /dev/urandom gave %i", len); - iov_consume(iov, in_num, NULL, len); + iov_consume(vq->dev, iov, in_num, NULL, len); totlen += len; } |
