diff options
author | Kevin Wolf <kwolf@redhat.com> | 2013-03-07 16:15:11 +0100 |
---|---|---|
committer | Kevin Wolf <kwolf@redhat.com> | 2013-03-22 17:51:32 +0100 |
commit | f53a1febcd9d887149ac1429880a3f2fdb2c117f (patch) | |
tree | 95803360968b6fe8198119ab36487f7f92da73ef /block | |
parent | 197a4859b914559489f41b63fd71ea4bfda17c3d (diff) |
nbd: Accept -drive options for the network connection
The existing parsers for the file name now parse everything into the
bdrv_open() options QDict. Instead of using these parsers, you can now
directly specify the options on the command line, like this:
qemu-system-x86_64 -drive file=nbd:,file.port=1234,file.host=::1
Clearly the file=... part could use further improvement, but it's a
start.
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
Diffstat (limited to 'block')
-rw-r--r-- | block/nbd.c | 129 |
1 files changed, 77 insertions, 52 deletions
diff --git a/block/nbd.c b/block/nbd.c index ecbc892f19..5ed8502071 100644 --- a/block/nbd.c +++ b/block/nbd.c @@ -32,6 +32,8 @@ #include "block/block_int.h" #include "qemu/module.h" #include "qemu/sockets.h" +#include "qapi/qmp/qjson.h" +#include "qapi/qmp/qint.h" #include <sys/types.h> #include <unistd.h> @@ -65,20 +67,19 @@ typedef struct BDRVNBDState { Coroutine *recv_coroutine[MAX_NBD_REQUESTS]; struct nbd_reply reply; - int is_unix; - char *unix_path; - - InetSocketAddress *inet_addr; + bool is_unix; + QemuOpts *socket_opts; char *export_name; /* An NBD server may export several devices */ } BDRVNBDState; -static int nbd_parse_uri(BDRVNBDState *s, const char *filename) +static int nbd_parse_uri(const char *filename, QDict *options) { URI *uri; const char *p; QueryParams *qp = NULL; int ret = 0; + bool is_unix; uri = uri_parse(filename); if (!uri) { @@ -87,11 +88,11 @@ static int nbd_parse_uri(BDRVNBDState *s, const char *filename) /* transport */ if (!strcmp(uri->scheme, "nbd")) { - s->is_unix = false; + is_unix = false; } else if (!strcmp(uri->scheme, "nbd+tcp")) { - s->is_unix = false; + is_unix = false; } else if (!strcmp(uri->scheme, "nbd+unix")) { - s->is_unix = true; + is_unix = true; } else { ret = -EINVAL; goto out; @@ -100,24 +101,26 @@ static int nbd_parse_uri(BDRVNBDState *s, const char *filename) p = uri->path ? uri->path : "/"; p += strspn(p, "/"); if (p[0]) { - s->export_name = g_strdup(p); + qdict_put(options, "export", qstring_from_str(p)); } qp = query_params_parse(uri->query); - if (qp->n > 1 || (s->is_unix && !qp->n) || (!s->is_unix && qp->n)) { + if (qp->n > 1 || (is_unix && !qp->n) || (!is_unix && qp->n)) { ret = -EINVAL; goto out; } - if (s->is_unix) { + if (is_unix) { /* nbd+unix:///export?socket=path */ if (uri->server || uri->port || strcmp(qp->p[0].name, "socket")) { ret = -EINVAL; goto out; } - s->unix_path = g_strdup(qp->p[0].value); + qdict_put(options, "path", qstring_from_str(qp->p[0].value)); } else { /* nbd[+tcp]://host:port/export */ + char *port_str; + if (!uri->server) { ret = -EINVAL; goto out; @@ -126,11 +129,10 @@ static int nbd_parse_uri(BDRVNBDState *s, const char *filename) uri->port = NBD_DEFAULT_PORT; } - s->inet_addr = g_new0(InetSocketAddress, 1); - *s->inet_addr = (InetSocketAddress) { - .host = g_strdup(uri->server), - .port = g_strdup_printf("%d", uri->port), - }; + port_str = g_strdup_printf("%d", uri->port); + qdict_put(options, "host", qstring_from_str(uri->server)); + qdict_put(options, "port", qstring_from_str(port_str)); + g_free(port_str); } out: @@ -141,17 +143,17 @@ out: return ret; } -static int nbd_config(BDRVNBDState *s, const char *filename) +static int nbd_parse_filename(const char *filename, QDict *options) { char *file; char *export_name; const char *host_spec; const char *unixpath; - int err = -EINVAL; + int ret = -EINVAL; Error *local_err = NULL; if (strstr(filename, "://")) { - return nbd_parse_uri(s, filename); + return nbd_parse_uri(filename, options); } file = g_strdup(filename); @@ -163,7 +165,8 @@ static int nbd_config(BDRVNBDState *s, const char *filename) } export_name[0] = 0; /* truncate 'file' */ export_name += strlen(EN_OPTSTR); - s->export_name = g_strdup(export_name); + + qdict_put(options, "export", qstring_from_str(export_name)); } /* extract the host_spec - fail if it's not nbd:... */ @@ -171,32 +174,65 @@ static int nbd_config(BDRVNBDState *s, const char *filename) goto out; } + if (!*host_spec) { + ret = 1; + goto out; + } + /* are we a UNIX or TCP socket? */ if (strstart(host_spec, "unix:", &unixpath)) { - s->is_unix = true; - s->unix_path = g_strdup(unixpath); + qdict_put(options, "path", qstring_from_str(unixpath)); } else { - s->is_unix = false; - s->inet_addr = inet_parse(host_spec, &local_err); + InetSocketAddress *addr = NULL; + + addr = inet_parse(host_spec, &local_err); if (local_err != NULL) { qerror_report_err(local_err); error_free(local_err); goto out; } - } - err = 0; + qdict_put(options, "host", qstring_from_str(addr->host)); + qdict_put(options, "port", qstring_from_str(addr->port)); + qapi_free_InetSocketAddress(addr); + } + ret = 1; out: g_free(file); - if (err != 0) { - g_free(s->export_name); - g_free(s->unix_path); - qapi_free_InetSocketAddress(s->inet_addr); + return ret; +} + +static int nbd_config(BDRVNBDState *s, QDict *options) +{ + Error *local_err = NULL; + + if (qdict_haskey(options, "path")) { + s->is_unix = true; + } else if (qdict_haskey(options, "host")) { + s->is_unix = false; + } else { + return -EINVAL; } - return err; + + s->socket_opts = qemu_opts_create_nofail(&socket_optslist); + + qemu_opts_absorb_qdict(s->socket_opts, options, &local_err); + if (error_is_set(&local_err)) { + qerror_report_err(local_err); + error_free(local_err); + return -EINVAL; + } + + s->export_name = g_strdup(qdict_get_try_str(options, "export")); + if (s->export_name) { + qdict_del(options, "export"); + } + + return 0; } + static void nbd_coroutine_start(BDRVNBDState *s, struct nbd_request *request) { int i; @@ -343,24 +379,9 @@ static int nbd_establish_connection(BlockDriverState *bs) size_t blocksize; if (s->is_unix) { - sock = unix_socket_outgoing(s->unix_path); + sock = unix_socket_outgoing(qemu_opt_get(s->socket_opts, "path")); } else { - QemuOpts *opts = qemu_opts_create_nofail(&socket_optslist); - - qemu_opt_set(opts, "host", s->inet_addr->host); - qemu_opt_set(opts, "port", s->inet_addr->port); - if (s->inet_addr->has_to) { - qemu_opt_set_number(opts, "to", s->inet_addr->to); - } - if (s->inet_addr->has_ipv4) { - qemu_opt_set_number(opts, "ipv4", s->inet_addr->ipv4); - } - if (s->inet_addr->has_ipv6) { - qemu_opt_set_number(opts, "ipv6", s->inet_addr->ipv6); - } - - sock = tcp_socket_outgoing_opts(opts); - qemu_opts_del(opts); + sock = tcp_socket_outgoing_opts(s->socket_opts); } /* Failed to establish connection */ @@ -416,7 +437,12 @@ static int nbd_open(BlockDriverState *bs, const char* filename, qemu_co_mutex_init(&s->free_sema); /* Pop the config into our state object. Exit if invalid. */ - result = nbd_config(s, filename); + result = nbd_parse_filename(filename, options); + if (result < 0) { + return result; + } + + result = nbd_config(s, options); if (result != 0) { return result; } @@ -580,8 +606,7 @@ static void nbd_close(BlockDriverState *bs) { BDRVNBDState *s = bs->opaque; g_free(s->export_name); - g_free(s->unix_path); - qapi_free_InetSocketAddress(s->inet_addr); + qemu_opts_del(s->socket_opts); nbd_teardown_connection(bs); } |