[PATCH] vhost: Coalesce vq_err formats, pr_fmt misuse, add missing newlines

From: Joe Perches
Date: Mon May 22 2017 - 06:33:57 EST

vhost logging uses of vq_err has a few defects and style inconsistencies.

o pr_debug already uses pr_fmt so its use in vq_err is defective
however no #defines of pr_fmt exist in this code so no actual
defects exist
o vq_err uses need terminating newlines so add the missing ones
o Coalesce formats and realign arguments

Signed-off-by: Joe Perches <joe@xxxxxxxxxxx>
---
drivers/vhost/net.c | 17 ++++++-------
drivers/vhost/scsi.c | 17 ++++++-------
drivers/vhost/test.c | 4 +--
drivers/vhost/vhost.c | 70 +++++++++++++++++++++++----------------------------
drivers/vhost/vhost.h | 11 ++++----
5 files changed, 54 insertions(+), 65 deletions(-)

diff --git a/drivers/vhost/net.c b/drivers/vhost/net.c
index e3d7ea1288c6..7c8c013381e1 100644
--- a/drivers/vhost/net.c
+++ b/drivers/vhost/net.c
@@ -501,8 +501,8 @@ static void handle_tx(struct vhost_net *net)
break;
}
if (in) {
- vq_err(vq, "Unexpected descriptor format for TX: "
- "out %d, int %d\n", out, in);
+ vq_err(vq, "Unexpected descriptor format for TX: out %d, int %d\n",
+ out, in);
break;
}
/* Skip header. TODO: support TSO. */
@@ -511,8 +511,7 @@ static void handle_tx(struct vhost_net *net)
iov_iter_advance(&msg.msg_iter, hdr_size);
/* Sanity check */
if (!msg_data_left(&msg)) {
- vq_err(vq, "Unexpected header len for TX: "
- "%zd expected %zd\n",
+ vq_err(vq, "Unexpected header len for TX: %zd expected %zd\n",
len, hdr_size);
break;
}
@@ -689,8 +688,8 @@ static int get_rx_bufs(struct vhost_virtqueue *vq,
goto err;
}
if (unlikely(out || in <= 0)) {
- vq_err(vq, "unexpected descriptor format for RX: "
- "out %d, in %d\n", out, in);
+ vq_err(vq, "unexpected descriptor format for RX: out %d, in %d\n",
+ out, in);
r = -EINVAL;
goto err;
}
@@ -822,8 +821,8 @@ static void handle_rx(struct vhost_net *net)
if (unlikely(vhost_hlen)) {
if (copy_to_iter(&hdr, sizeof(hdr),
&fixup) != sizeof(hdr)) {
- vq_err(vq, "Unable to write vnet_hdr "
- "at addr %p\n", vq->iov->iov_base);
+ vq_err(vq, "Unable to write vnet_hdr at addr %p\n",
+ vq->iov->iov_base);
goto out;
}
} else {
@@ -838,7 +837,7 @@ static void handle_rx(struct vhost_net *net)
if (likely(mergeable) &&
copy_to_iter(&num_buffers, sizeof num_buffers,
&fixup) != sizeof num_buffers) {
- vq_err(vq, "Failed num_buffers write");
+ vq_err(vq, "Failed num_buffers write\n");
vhost_discard_vq_desc(vq, headcount);
goto out;
}
diff --git a/drivers/vhost/scsi.c b/drivers/vhost/scsi.c
index fd6c8b66f06f..c0d3746d5ff3 100644
--- a/drivers/vhost/scsi.c
+++ b/drivers/vhost/scsi.c
@@ -473,7 +473,7 @@ vhost_scsi_do_evt_work(struct vhost_scsi *vs, struct vhost_scsi_evt *evt)

if ((vq->iov[out].iov_len != sizeof(struct virtio_scsi_event))) {
vq_err(vq, "Expecting virtio_scsi_event, got %zu bytes\n",
- vq->iov[out].iov_len);
+ vq->iov[out].iov_len);
vs->vs_events_missed = true;
return;
}
@@ -885,8 +885,8 @@ vhost_scsi_handle_vq(struct vhost_scsi *vs, struct vhost_virtqueue *vq)
* errors back to the guest.
*/
if (unlikely(vq->iov[out].iov_len < rsp_size)) {
- vq_err(vq, "Expecting at least virtio_scsi_cmd_resp"
- " size, got %zu bytes\n", vq->iov[out].iov_len);
+ vq_err(vq, "Expecting at least virtio_scsi_cmd_resp size, got %zu bytes\n",
+ vq->iov[out].iov_len);
break;
}
/*
@@ -981,16 +981,14 @@ vhost_scsi_handle_vq(struct vhost_scsi *vs, struct vhost_virtqueue *vq)
if (t10_pi) {
if (v_req_pi.pi_bytesout) {
if (data_direction != DMA_TO_DEVICE) {
- vq_err(vq, "Received non zero pi_bytesout,"
- " but wrong data_direction\n");
+ vq_err(vq, "Received non zero pi_bytesout, but wrong data_direction\n");
vhost_scsi_send_bad_target(vs, vq, head, out);
continue;
}
prot_bytes = vhost32_to_cpu(vq, v_req_pi.pi_bytesout);
} else if (v_req_pi.pi_bytesin) {
if (data_direction != DMA_FROM_DEVICE) {
- vq_err(vq, "Received non zero pi_bytesin,"
- " but wrong data_direction\n");
+ vq_err(vq, "Received non zero pi_bytesin, but wrong data_direction\n");
vhost_scsi_send_bad_target(vs, vq, head, out);
continue;
}
@@ -1026,9 +1024,8 @@ vhost_scsi_handle_vq(struct vhost_scsi *vs, struct vhost_virtqueue *vq)
* TODO what if cdb was too small for varlen cdb header?
*/
if (unlikely(scsi_command_size(cdb) > VHOST_SCSI_MAX_CDB_SIZE)) {
- vq_err(vq, "Received SCSI CDB with command_size: %d that"
- " exceeds SCSI_MAX_VARLEN_CDB_SIZE: %d\n",
- scsi_command_size(cdb), VHOST_SCSI_MAX_CDB_SIZE);
+ vq_err(vq, "Received SCSI CDB with command_size: %d that exceeds SCSI_MAX_VARLEN_CDB_SIZE: %d\n",
+ scsi_command_size(cdb), VHOST_SCSI_MAX_CDB_SIZE);
vhost_scsi_send_bad_target(vs, vq, head, out);
continue;
}
diff --git a/drivers/vhost/test.c b/drivers/vhost/test.c
index 3cc98c07dcd3..a48e9747505d 100644
--- a/drivers/vhost/test.c
+++ b/drivers/vhost/test.c
@@ -69,8 +69,8 @@ static void handle_vq(struct vhost_test *n)
break;
}
if (in) {
- vq_err(vq, "Unexpected descriptor format for TX: "
- "out %d, int %d\n", out, in);
+ vq_err(vq, "Unexpected descriptor format for TX: out %d, int %d\n",
+ out, in);
break;
}
len = iov_length(vq->iov, out);
diff --git a/drivers/vhost/vhost.c b/drivers/vhost/vhost.c
index 042030e5a035..6730735d31c7 100644
--- a/drivers/vhost/vhost.c
+++ b/drivers/vhost/vhost.c
@@ -802,9 +802,8 @@ static int vhost_copy_from_user(struct vhost_virtqueue *vq, void *to,
ARRAY_SIZE(vq->iotlb_iov),
VHOST_ACCESS_RO);
if (ret < 0) {
- vq_err(vq, "IOTLB translation failure: uaddr "
- "%p size 0x%llx\n", from,
- (unsigned long long) size);
+ vq_err(vq, "IOTLB translation failure: uaddr %p size 0x%llx\n",
+ from, (unsigned long long)size);
goto out;
}
iov_iter_init(&f, READ, vq->iotlb_iov, ret, size);
@@ -827,16 +826,14 @@ static void __user *__vhost_get_user_slow(struct vhost_virtqueue *vq,
ARRAY_SIZE(vq->iotlb_iov),
VHOST_ACCESS_RO);
if (ret < 0) {
- vq_err(vq, "IOTLB translation failure: uaddr "
- "%p size 0x%llx\n", addr,
- (unsigned long long) size);
+ vq_err(vq, "IOTLB translation failure: uaddr %p size 0x%llx\n",
+ addr, (unsigned long long)size);
return NULL;
}

if (ret != 1 || vq->iotlb_iov[0].iov_len != size) {
- vq_err(vq, "Non atomic userspace memory access: uaddr "
- "%p size 0x%llx\n", addr,
- (unsigned long long) size);
+ vq_err(vq, "Non atomic userspace memory access: uaddr %p size 0x%llx\n",
+ addr, (unsigned long long)size);
return NULL;
}

@@ -1807,8 +1804,7 @@ int vhost_vq_init_access(struct vhost_virtqueue *vq)
}
r = vhost_get_used(vq, last_used_idx, &vq->used->idx);
if (r) {
- vq_err(vq, "Can't access used idx at %p\n",
- &vq->used->idx);
+ vq_err(vq, "Can't access used idx at %p\n", &vq->used->idx);
goto err;
}
vq->last_used_idx = vhost16_to_cpu(vq, last_used_idx);
@@ -1901,10 +1897,8 @@ static int get_indirect(struct vhost_virtqueue *vq,

/* Sanity check */
if (unlikely(len % sizeof desc)) {
- vq_err(vq, "Invalid length in indirect descriptor: "
- "len 0x%llx not multiple of 0x%zx\n",
- (unsigned long long)len,
- sizeof desc);
+ vq_err(vq, "Invalid length in indirect descriptor: len 0x%llx not multiple of 0x%zx\n",
+ (unsigned long long)len, sizeof(desc));
return -EINVAL;
}

@@ -1912,7 +1906,7 @@ static int get_indirect(struct vhost_virtqueue *vq,
UIO_MAXIOV, VHOST_ACCESS_RO);
if (unlikely(ret < 0)) {
if (ret != -EAGAIN)
- vq_err(vq, "Translation failure %d in indirect.\n", ret);
+ vq_err(vq, "Translation failure %d in indirect\n", ret);
return ret;
}
iov_iter_init(&from, READ, vq->indirect, ret, len);
@@ -1933,8 +1927,7 @@ static int get_indirect(struct vhost_virtqueue *vq,
do {
unsigned iov_count = *in_num + *out_num;
if (unlikely(++found > count)) {
- vq_err(vq, "Loop detected: last one at %u "
- "indirect size %u\n",
+ vq_err(vq, "Loop detected: last one at %u indirect size %u\n",
i, count);
return -EINVAL;
}
@@ -1960,7 +1953,7 @@ static int get_indirect(struct vhost_virtqueue *vq,
if (unlikely(ret < 0)) {
if (ret != -EAGAIN)
vq_err(vq, "Translation failure %d indirect idx %d\n",
- ret, i);
+ ret, i);
return ret;
}
/* If this is an input descriptor, increment that count. */
@@ -1975,8 +1968,8 @@ static int get_indirect(struct vhost_virtqueue *vq,
/* If it's an output descriptor, they're all supposed
* to come before any input descriptors. */
if (unlikely(*in_num)) {
- vq_err(vq, "Indirect descriptor "
- "has out after in: idx %d\n", i);
+ vq_err(vq, "Indirect descriptor has out after in: idx %d\n",
+ i);
return -EINVAL;
}
*out_num += ret;
@@ -2011,14 +2004,14 @@ int vhost_get_vq_desc(struct vhost_virtqueue *vq,
if (vq->avail_idx == vq->last_avail_idx) {
if (unlikely(vhost_get_avail(vq, avail_idx, &vq->avail->idx))) {
vq_err(vq, "Failed to access avail idx at %p\n",
- &vq->avail->idx);
+ &vq->avail->idx);
return -EFAULT;
}
vq->avail_idx = vhost16_to_cpu(vq, avail_idx);

if (unlikely((u16)(vq->avail_idx - last_avail_idx) > vq->num)) {
- vq_err(vq, "Guest moved used index from %u to %u",
- last_avail_idx, vq->avail_idx);
+ vq_err(vq, "Guest moved used index from %u to %u\n",
+ last_avail_idx, vq->avail_idx);
return -EFAULT;
}

@@ -2048,7 +2041,7 @@ int vhost_get_vq_desc(struct vhost_virtqueue *vq,

/* If their number is silly, that's an error. */
if (unlikely(head >= vq->num)) {
- vq_err(vq, "Guest says index %u > %u is available",
+ vq_err(vq, "Guest says index %u > %u is available\n",
head, vq->num);
return -EINVAL;
}
@@ -2062,13 +2055,12 @@ int vhost_get_vq_desc(struct vhost_virtqueue *vq,
do {
unsigned iov_count = *in_num + *out_num;
if (unlikely(i >= vq->num)) {
- vq_err(vq, "Desc index is %u > %u, head = %u",
+ vq_err(vq, "Desc index is %u > %u, head = %u\n",
i, vq->num, head);
return -EINVAL;
}
if (unlikely(++found > vq->num)) {
- vq_err(vq, "Loop detected: last one at %u "
- "vq size %u head %u\n",
+ vq_err(vq, "Loop detected: last one at %u vq size %u head %u\n",
i, vq->num, head);
return -EINVAL;
}
@@ -2085,8 +2077,8 @@ int vhost_get_vq_desc(struct vhost_virtqueue *vq,
log, log_num, &desc);
if (unlikely(ret < 0)) {
if (ret != -EAGAIN)
- vq_err(vq, "Failure detected "
- "in indirect descriptor at idx %d\n", i);
+ vq_err(vq, "Failure detected in indirect descriptor at idx %d\n",
+ i);
return ret;
}
continue;
@@ -2102,7 +2094,7 @@ int vhost_get_vq_desc(struct vhost_virtqueue *vq,
if (unlikely(ret < 0)) {
if (ret != -EAGAIN)
vq_err(vq, "Translation failure %d descriptor idx %d\n",
- ret, i);
+ ret, i);
return ret;
}
if (access == VHOST_ACCESS_WO) {
@@ -2118,8 +2110,8 @@ int vhost_get_vq_desc(struct vhost_virtqueue *vq,
/* If it's an output descriptor, they're all supposed
* to come before any input descriptors. */
if (unlikely(*in_num)) {
- vq_err(vq, "Descriptor has out after in: "
- "idx %d\n", i);
+ vq_err(vq, "Descriptor has out after in: idx %d\n",
+ i);
return -EINVAL;
}
*out_num += ret;
@@ -2168,15 +2160,15 @@ static int __vhost_add_used_n(struct vhost_virtqueue *vq,
used = vq->used->ring + start;
if (count == 1) {
if (vhost_put_user(vq, heads[0].id, &used->id)) {
- vq_err(vq, "Failed to write used id");
+ vq_err(vq, "Failed to write used id\n");
return -EFAULT;
}
if (vhost_put_user(vq, heads[0].len, &used->len)) {
- vq_err(vq, "Failed to write used len");
+ vq_err(vq, "Failed to write used len\n");
return -EFAULT;
}
} else if (vhost_copy_to_user(vq, used, heads, count * sizeof *used)) {
- vq_err(vq, "Failed to write used");
+ vq_err(vq, "Failed to write used\n");
return -EFAULT;
}
if (unlikely(vq->log_used)) {
@@ -2221,7 +2213,7 @@ int vhost_add_used_n(struct vhost_virtqueue *vq, struct vring_used_elem *heads,
smp_wmb();
if (vhost_put_user(vq, cpu_to_vhost16(vq, vq->last_used_idx),
&vq->used->idx)) {
- vq_err(vq, "Failed to increment used idx");
+ vq_err(vq, "Failed to increment used idx\n");
return -EFAULT;
}
if (unlikely(vq->log_used)) {
@@ -2253,7 +2245,7 @@ static bool vhost_notify(struct vhost_dev *dev, struct vhost_virtqueue *vq)
* interrupts. */
smp_mb();
if (vhost_get_avail(vq, flags, &vq->avail->flags)) {
- vq_err(vq, "Failed to get flags");
+ vq_err(vq, "Failed to get flags\n");
return true;
}
return !(flags & cpu_to_vhost16(vq, VRING_AVAIL_F_NO_INTERRUPT));
@@ -2280,7 +2272,7 @@ static bool vhost_notify(struct vhost_dev *dev, struct vhost_virtqueue *vq)
smp_mb();

if (vhost_get_avail(vq, event, vhost_used_event(vq))) {
- vq_err(vq, "Failed to get used event idx");
+ vq_err(vq, "Failed to get used event idx\n");
return true;
}
vq->last_used_event = vhost16_to_cpu(vq, event);
diff --git a/drivers/vhost/vhost.h b/drivers/vhost/vhost.h
index f55671d53f28..18bcfc70459a 100644
--- a/drivers/vhost/vhost.h
+++ b/drivers/vhost/vhost.h
@@ -227,11 +227,12 @@ ssize_t vhost_chr_write_iter(struct vhost_dev *dev,
struct iov_iter *from);
int vhost_init_device_iotlb(struct vhost_dev *d, bool enabled);

-#define vq_err(vq, fmt, ...) do { \
- pr_debug(pr_fmt(fmt), ##__VA_ARGS__); \
- if ((vq)->error_ctx) \
- eventfd_signal((vq)->error_ctx, 1);\
- } while (0)
+#define vq_err(vq, fmt, ...) \
+do { \
+ pr_debug(fmt, ##__VA_ARGS__); \
+ if ((vq)->error_ctx) \
+ eventfd_signal((vq)->error_ctx, 1); \
+} while (0)

enum {
VHOST_FEATURES = (1ULL << VIRTIO_F_NOTIFY_ON_EMPTY) |
--
2.10.0.rc2.1.g053435c