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Diffstat (limited to 'nbd/client.c')
-rw-r--r--nbd/client.c98
1 files changed, 63 insertions, 35 deletions
diff --git a/nbd/client.c b/nbd/client.c
index 31b88f3a31..287487c6c2 100644
--- a/nbd/client.c
+++ b/nbd/client.c
@@ -33,8 +33,10 @@ static int nbd_errno_to_system_errno(int err)
return ENOMEM;
case NBD_ENOSPC:
return ENOSPC;
- case NBD_EINVAL:
default:
+ TRACE("Squashing unexpected error %d to EINVAL", err);
+ /* fallthrough */
+ case NBD_EINVAL:
return EINVAL;
}
}
@@ -109,25 +111,27 @@ static int nbd_handle_reply_err(QIOChannel *ioc, uint32_t opt, uint32_t type,
switch (type) {
case NBD_REP_ERR_UNSUP:
- TRACE("server doesn't understand request %d, attempting fallback",
- opt);
+ TRACE("server doesn't understand request %" PRIx32
+ ", attempting fallback", opt);
result = 0;
goto cleanup;
case NBD_REP_ERR_POLICY:
- error_setg(errp, "Denied by server for option %x", opt);
+ error_setg(errp, "Denied by server for option %" PRIx32, opt);
break;
case NBD_REP_ERR_INVALID:
- error_setg(errp, "Invalid data length for option %x", opt);
+ error_setg(errp, "Invalid data length for option %" PRIx32, opt);
break;
case NBD_REP_ERR_TLS_REQD:
- error_setg(errp, "TLS negotiation required before option %x", opt);
+ error_setg(errp, "TLS negotiation required before option %" PRIx32,
+ opt);
break;
default:
- error_setg(errp, "Unknown error code when asking for option %x", opt);
+ error_setg(errp, "Unknown error code when asking for option %" PRIx32,
+ opt);
break;
}
@@ -165,7 +169,7 @@ static int nbd_receive_list(QIOChannel *ioc, char **name, Error **errp)
}
opt = be32_to_cpu(opt);
if (opt != NBD_OPT_LIST) {
- error_setg(errp, "Unexpected option type %x expected %x",
+ error_setg(errp, "Unexpected option type %" PRIx32 " expected %x",
opt, NBD_OPT_LIST);
return -1;
}
@@ -206,8 +210,8 @@ static int nbd_receive_list(QIOChannel *ioc, char **name, Error **errp)
error_setg(errp, "incorrect option name length");
return -1;
}
- if (namelen > 255) {
- error_setg(errp, "export name length too long %d", namelen);
+ if (namelen > NBD_MAX_NAME_SIZE) {
+ error_setg(errp, "export name length too long %" PRIu32, namelen);
return -1;
}
@@ -234,7 +238,7 @@ static int nbd_receive_list(QIOChannel *ioc, char **name, Error **errp)
g_free(buf);
}
} else {
- error_setg(errp, "Unexpected reply type %x expected %x",
+ error_setg(errp, "Unexpected reply type %" PRIx32 " expected %x",
type, NBD_REP_SERVER);
return -1;
}
@@ -349,7 +353,7 @@ static QIOChannel *nbd_receive_starttls(QIOChannel *ioc,
}
opt = be32_to_cpu(opt);
if (opt != NBD_OPT_STARTTLS) {
- error_setg(errp, "Unexpected option type %x expected %x",
+ error_setg(errp, "Unexpected option type %" PRIx32 " expected %x",
opt, NBD_OPT_STARTTLS);
return NULL;
}
@@ -361,7 +365,7 @@ static QIOChannel *nbd_receive_starttls(QIOChannel *ioc,
}
type = be32_to_cpu(type);
if (type != NBD_REP_ACK) {
- error_setg(errp, "Server rejected request to start TLS %x",
+ error_setg(errp, "Server rejected request to start TLS %" PRIx32,
type);
return NULL;
}
@@ -373,7 +377,7 @@ static QIOChannel *nbd_receive_starttls(QIOChannel *ioc,
}
length = be32_to_cpu(length);
if (length != 0) {
- error_setg(errp, "Start TLS response was not zero %x",
+ error_setg(errp, "Start TLS response was not zero %" PRIu32,
length);
return NULL;
}
@@ -384,7 +388,7 @@ static QIOChannel *nbd_receive_starttls(QIOChannel *ioc,
return NULL;
}
data.loop = g_main_loop_new(g_main_context_default(), FALSE);
- TRACE("Starting TLS hanshake");
+ TRACE("Starting TLS handshake");
qio_channel_tls_handshake(tioc,
nbd_tls_handshake,
&data,
@@ -474,7 +478,7 @@ int nbd_receive_negotiate(QIOChannel *ioc, const char *name, uint32_t *flags,
}
globalflags = be16_to_cpu(globalflags);
*flags = globalflags << 16;
- TRACE("Global flags are %x", globalflags);
+ TRACE("Global flags are %" PRIx32, globalflags);
if (globalflags & NBD_FLAG_FIXED_NEWSTYLE) {
fixedNewStyle = true;
TRACE("Server supports fixed new style");
@@ -550,7 +554,7 @@ int nbd_receive_negotiate(QIOChannel *ioc, const char *name, uint32_t *flags,
}
exportflags = be16_to_cpu(exportflags);
*flags |= exportflags;
- TRACE("Export flags are %x", exportflags);
+ TRACE("Export flags are %" PRIx16, exportflags);
} else if (magic == NBD_CLIENT_MAGIC) {
if (name) {
error_setg(errp, "Server does not support export names");
@@ -572,7 +576,7 @@ 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;
@@ -591,9 +595,15 @@ fail:
#ifdef __linux__
int nbd_init(int fd, QIOChannelSocket *sioc, uint32_t flags, off_t size)
{
+ unsigned long sectors = size / BDRV_SECTOR_SIZE;
+ if (size / BDRV_SECTOR_SIZE != sectors) {
+ LOG("Export size %lld too large for 32-bit kernel", (long long) size);
+ return -E2BIG;
+ }
+
TRACE("Setting NBD socket");
- if (ioctl(fd, NBD_SET_SOCK, sioc->fd) < 0) {
+ if (ioctl(fd, NBD_SET_SOCK, (unsigned long) sioc->fd) < 0) {
int serrno = errno;
LOG("Failed to set NBD socket");
return -serrno;
@@ -601,21 +611,25 @@ int nbd_init(int fd, QIOChannelSocket *sioc, uint32_t flags, off_t size)
TRACE("Setting block size to %lu", (unsigned long)BDRV_SECTOR_SIZE);
- if (ioctl(fd, NBD_SET_BLKSIZE, (size_t)BDRV_SECTOR_SIZE) < 0) {
+ if (ioctl(fd, NBD_SET_BLKSIZE, (unsigned long)BDRV_SECTOR_SIZE) < 0) {
int serrno = errno;
LOG("Failed setting NBD block size");
return -serrno;
}
- TRACE("Setting size to %zd block(s)", (size_t)(size / BDRV_SECTOR_SIZE));
+ TRACE("Setting size to %lu block(s)", sectors);
+ if (size % BDRV_SECTOR_SIZE) {
+ TRACE("Ignoring trailing %d bytes of export",
+ (int) (size % BDRV_SECTOR_SIZE));
+ }
- if (ioctl(fd, NBD_SET_SIZE_BLOCKS, (size_t)(size / BDRV_SECTOR_SIZE)) < 0) {
+ if (ioctl(fd, NBD_SET_SIZE_BLOCKS, sectors) < 0) {
int serrno = errno;
LOG("Failed setting size (in blocks)");
return -serrno;
}
- if (ioctl(fd, NBD_SET_FLAGS, flags) < 0) {
+ if (ioctl(fd, NBD_SET_FLAGS, (unsigned long) flags) < 0) {
if (errno == ENOTTY) {
int read_only = (flags & NBD_FLAG_READ_ONLY) != 0;
TRACE("Setting readonly attribute");
@@ -665,6 +679,15 @@ int nbd_client(int fd)
errno = serrno;
return ret;
}
+
+int nbd_disconnect(int fd)
+{
+ ioctl(fd, NBD_CLEAR_QUE);
+ ioctl(fd, NBD_DISCONNECT);
+ ioctl(fd, NBD_CLEAR_SOCK);
+ return 0;
+}
+
#else
int nbd_init(int fd, QIOChannelSocket *ioc, uint32_t flags, off_t size)
{
@@ -675,6 +698,10 @@ int nbd_client(int fd)
{
return -ENOTSUP;
}
+int nbd_disconnect(int fd)
+{
+ return -ENOTSUP;
+}
#endif
ssize_t nbd_send_request(QIOChannel *ioc, struct nbd_request *request)
@@ -683,14 +710,15 @@ ssize_t nbd_send_request(QIOChannel *ioc, struct nbd_request *request)
ssize_t ret;
TRACE("Sending request to server: "
- "{ .from = %" PRIu64", .len = %u, .handle = %" PRIu64", .type=%i}",
+ "{ .from = %" PRIu64", .len = %" PRIu32 ", .handle = %" PRIu64
+ ", .type=%" PRIu16 " }",
request->from, request->len, request->handle, request->type);
- cpu_to_be32w((uint32_t*)buf, NBD_REQUEST_MAGIC);
- cpu_to_be32w((uint32_t*)(buf + 4), request->type);
- cpu_to_be64w((uint64_t*)(buf + 8), request->handle);
- cpu_to_be64w((uint64_t*)(buf + 16), request->from);
- cpu_to_be32w((uint32_t*)(buf + 24), request->len);
+ stl_be_p(buf, NBD_REQUEST_MAGIC);
+ stl_be_p(buf + 4, request->type);
+ stq_be_p(buf + 8, request->handle);
+ stq_be_p(buf + 16, request->from);
+ stl_be_p(buf + 24, request->len);
ret = write_sync(ioc, buf, sizeof(buf));
if (ret < 0) {
@@ -726,18 +754,18 @@ 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);
- TRACE("Got reply: "
- "{ magic = 0x%x, .error = %d, handle = %" PRIu64" }",
+ TRACE("Got reply: { magic = 0x%" PRIx32 ", .error = % " PRId32
+ ", handle = %" PRIu64" }",
magic, reply->error, reply->handle);
if (magic != NBD_REPLY_MAGIC) {
- LOG("invalid magic (got 0x%x)", magic);
+ LOG("invalid magic (got 0x%" PRIx32 ")", magic);
return -EINVAL;
}
return 0;
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2026-02-27 14:19:48 +0100