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lib/nbd: merge read_from_socket/write_to_socket into nbd_sock_rw

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Purpose:

1 Remove duplicated code.
2 Add one error return check.

Change-Id: I8d2517e120818482b9bdf56e02cd901363b79aee
Signed-off-by: Ziye Yang <ziye.yang@intel.com>
Reviewed-on: https://review.spdk.io/gerrit/c/spdk/spdk/+/5732
Tested-by: SPDK CI Jenkins <sys_sgci@intel.com>
Reviewed-by: Aleksey Marchuk <alexeymar@mellanox.com>
Reviewed-by: <dongx.yi@intel.com>
Reviewed-by: Changpeng Liu <changpeng.liu@intel.com>
This commit is contained in:
Ziye Yang 2020-12-30 22:29:45 +08:00 committed by Tomasz Zawadzki
parent d2704a0f48
commit a1d4a714b2
1 changed files with 16 additions and 28 deletions
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44
lib/nbd/nbd.c
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@ -415,38 +415,25 @@ spdk_nbd_stop(struct spdk_nbd_disk *nbd)
}
static int64_t
read_from_socket(int fd, void *buf, size_t length)
nbd_socket_rw(int fd, void *buf, size_t length, bool read_op)
{
ssize_t bytes_read;
ssize_t rc;
bytes_read = read(fd, buf, length);
if (bytes_read == 0) {
return -EIO;
} else if (bytes_read == -1) {
if (errno != EAGAIN) {
return -errno;
}
return 0;
if (read_op) {
rc = read(fd, buf, length);
} else {
return bytes_read;
rc = write(fd, buf, length);
}
}
static int64_t
write_to_socket(int fd, void *buf, size_t length)
{
ssize_t bytes_written;
bytes_written = write(fd, buf, length);
if (bytes_written == 0) {
if (rc == 0) {
return -EIO;
} else if (bytes_written == -1) {
if (errno != EAGAIN) {
} else if (rc == -1) {
if (errno != EAGAIN && errno != EWOULDBLOCK) {
return -errno;
}
return 0;
} else {
return bytes_written;
return rc;
}
}
@ -608,8 +595,8 @@ nbd_io_recv_internal(struct spdk_nbd_disk *nbd)
io = nbd->io_in_recv;
if (io->state == NBD_IO_RECV_REQ) {
ret = read_from_socket(nbd->spdk_sp_fd, (char *)&io->req + io->offset,
sizeof(io->req) - io->offset);
ret = nbd_socket_rw(nbd->spdk_sp_fd, (char *)&io->req + io->offset,
sizeof(io->req) - io->offset, true);
if (ret < 0) {
nbd_put_io(nbd, io);
nbd->io_in_recv = NULL;
@ -665,7 +652,7 @@ nbd_io_recv_internal(struct spdk_nbd_disk *nbd)
}
if (io->state == NBD_IO_RECV_PAYLOAD) {
ret = read_from_socket(nbd->spdk_sp_fd, io->payload + io->offset, io->payload_size - io->offset);
ret = nbd_socket_rw(nbd->spdk_sp_fd, io->payload + io->offset, io->payload_size - io->offset, true);
if (ret < 0) {
nbd_put_io(nbd, io);
nbd->io_in_recv = NULL;
@ -733,8 +720,8 @@ nbd_io_xmit_internal(struct spdk_nbd_disk *nbd)
/* resp error and handler are already set in io_done */
if (io->state == NBD_IO_XMIT_RESP) {
ret = write_to_socket(nbd->spdk_sp_fd, (char *)&io->resp + io->offset,
sizeof(io->resp) - io->offset);
ret = nbd_socket_rw(nbd->spdk_sp_fd, (char *)&io->resp + io->offset,
sizeof(io->resp) - io->offset, false);
if (ret <= 0) {
goto reinsert;
}
@ -757,7 +744,8 @@ nbd_io_xmit_internal(struct spdk_nbd_disk *nbd)
}
if (io->state == NBD_IO_XMIT_PAYLOAD) {
ret = write_to_socket(nbd->spdk_sp_fd, io->payload + io->offset, io->payload_size - io->offset);
ret = nbd_socket_rw(nbd->spdk_sp_fd, io->payload + io->offset, io->payload_size - io->offset,
false);
if (ret <= 0) {
goto reinsert;
}