diff options
Diffstat (limited to 'include/block/nbd.h')
| -rw-r--r-- | include/block/nbd.h | 32 |
1 files changed, 30 insertions, 2 deletions
diff --git a/include/block/nbd.h b/include/block/nbd.h index 4faf394e34..96cfb1d7d5 100644 --- a/include/block/nbd.h +++ b/include/block/nbd.h @@ -23,6 +23,7 @@ #include "qapi/qapi-types-block.h" #include "io/channel-socket.h" #include "crypto/tlscreds.h" +#include "qapi/error.h" /* Handshake phase structs - this struct is passed on the wire */ @@ -336,11 +337,38 @@ void nbd_server_start(SocketAddress *addr, const char *tls_creds, * Reads @size bytes from @ioc. Returns 0 on success. */ static inline int nbd_read(QIOChannel *ioc, void *buffer, size_t size, - Error **errp) + const char *desc, Error **errp) { - return qio_channel_read_all(ioc, buffer, size, errp) < 0 ? -EIO : 0; + int ret = qio_channel_read_all(ioc, buffer, size, errp) < 0 ? -EIO : 0; + + if (ret < 0) { + if (desc) { + error_prepend(errp, "Failed to read %s: ", desc); + } + return -1; + } + + return 0; +} + +#define DEF_NBD_READ_N(bits) \ +static inline int nbd_read##bits(QIOChannel *ioc, \ + uint##bits##_t *val, \ + const char *desc, Error **errp) \ +{ \ + if (nbd_read(ioc, val, sizeof(*val), desc, errp) < 0) { \ + return -1; \ + } \ + *val = be##bits##_to_cpu(*val); \ + return 0; \ } +DEF_NBD_READ_N(16) /* Defines nbd_read16(). */ +DEF_NBD_READ_N(32) /* Defines nbd_read32(). */ +DEF_NBD_READ_N(64) /* Defines nbd_read64(). */ + +#undef DEF_NBD_READ_N + static inline bool nbd_reply_is_simple(NBDReply *reply) { return reply->magic == NBD_SIMPLE_REPLY_MAGIC; |