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nbd: Don't use *_to_cpup() functions 

The *_to_cpup() functions are not very useful, as they simply do
a pointer dereference and then a *_to_cpu(). Instead use either:
 * ld*_*_p(), if the data is at an address that might not be
   correctly aligned for the load
 * a local dereference and *_to_cpu(), if the pointer is
   the correct type and known to be correctly aligned

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-Id: <1465570836-22211-1-git-send-email-peter.maydell@linaro.org>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Peter Maydell 2016-06-10 16:00:36 +01:00 committed by Paolo Bonzini
parent 0fb2331254
commit 773dce3c72
3 changed files with 11 additions and 11 deletions
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8
nbd/client.c
View File

@ -572,7 +572,7 @@ int nbd_receive_negotiate(QIOChannel *ioc, const char *name, uint32_t *flags,
error_setg(errp, "Failed to read export flags");
goto fail;
}
*flags = be32_to_cpup(flags);
*flags = be32_to_cpu(*flags);
} else {
error_setg(errp, "Bad magic received");
goto fail;
@ -726,9 +726,9 @@ ssize_t nbd_receive_reply(QIOChannel *ioc, struct nbd_reply *reply)
[ 7 .. 15] handle
*/
magic = be32_to_cpup((uint32_t*)buf);
reply->error = be32_to_cpup((uint32_t*)(buf + 4));
reply->handle = be64_to_cpup((uint64_t*)(buf + 8));
magic = ldl_be_p(buf);
reply->error = ldl_be_p(buf + 4);
reply->handle = ldq_be_p(buf + 8);
reply->error = nbd_errno_to_system_errno(reply->error);

10
nbd/server.c
View File

@ -646,11 +646,11 @@ static ssize_t nbd_receive_request(QIOChannel *ioc, struct nbd_request *request)
[24 .. 27] len
*/
magic = be32_to_cpup((uint32_t*)buf);
request->type = be32_to_cpup((uint32_t*)(buf + 4));
request->handle = be64_to_cpup((uint64_t*)(buf + 8));
request->from = be64_to_cpup((uint64_t*)(buf + 16));
request->len = be32_to_cpup((uint32_t*)(buf + 24));
magic = ldl_be_p(buf);
request->type = ldl_be_p(buf + 4);
request->handle = ldq_be_p(buf + 8);
request->from = ldq_be_p(buf + 16);
request->len = ldl_be_p(buf + 24);
TRACE("Got request: "
"{ magic = 0x%x, .type = %d, from = %" PRIu64" , len = %u }",

4
qemu-nbd.c
View File

@ -154,8 +154,8 @@ static void read_partition(uint8_t *p, struct partition_record *r)
r->end_cylinder = p[7] | ((p[6] << 2) & 0x300);
r->end_sector = p[6] & 0x3f;
r->start_sector_abs = le32_to_cpup((uint32_t *)(p + 8));
r->nb_sectors_abs = le32_to_cpup((uint32_t *)(p + 12));
r->start_sector_abs = ldl_le_p(p + 8);
r->nb_sectors_abs = ldl_le_p(p + 12);
}
static int find_partition(BlockBackend *blk, int partition,