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nbd/server: refactor NBDExportMetaContexts 

Use NBDExport pointer instead of just export name: there is no need to
store a duplicated name in the struct; moreover, NBDExport will be used
further.

Signed-off-by: Vladimir Sementsov-Ogievskiy <vsementsov@virtuozzo.com>
Message-Id: <20180609151758.17343-3-vsementsov@virtuozzo.com>
Reviewed-by: Eric Blake <eblake@redhat.com>
[eblake: commit message grammar tweak]
Signed-off-by: Eric Blake <eblake@redhat.com>
master
Vladimir Sementsov-Ogievskiy 2018-06-09 18:17:54 +03:00 committed by Eric Blake
parent dbb8b396bb
commit af736e5467
1 changed files with 11 additions and 12 deletions
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23
nbd/server.c
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@ -88,7 +88,7 @@ static QTAILQ_HEAD(, NBDExport) exports = QTAILQ_HEAD_INITIALIZER(exports);
* as selected by NBD_OPT_SET_META_CONTEXT. Also used for * as selected by NBD_OPT_SET_META_CONTEXT. Also used for
* NBD_OPT_LIST_META_CONTEXT. */ * NBD_OPT_LIST_META_CONTEXT. */
typedef struct NBDExportMetaContexts { typedef struct NBDExportMetaContexts {
char export_name[NBD_MAX_NAME_SIZE + 1]; NBDExport *exp;
bool valid; /* means that negotiation of the option finished without bool valid; /* means that negotiation of the option finished without
errors */ errors */
bool base_allocation; /* export base:allocation context (block status) */ bool base_allocation; /* export base:allocation context (block status) */
@ -399,10 +399,9 @@ static int nbd_negotiate_handle_list(NBDClient *client, Error **errp)
return nbd_negotiate_send_rep(client, NBD_REP_ACK, errp); return nbd_negotiate_send_rep(client, NBD_REP_ACK, errp);
} }
static void nbd_check_meta_export_name(NBDClient *client) static void nbd_check_meta_export(NBDClient *client)
{ {
client->export_meta.valid &= !strcmp(client->exp->name, client->export_meta.valid &= client->exp == client->export_meta.exp;
client->export_meta.export_name);
} }
/* Send a reply to NBD_OPT_EXPORT_NAME. /* Send a reply to NBD_OPT_EXPORT_NAME.
@ -456,7 +455,7 @@ static int nbd_negotiate_handle_export_name(NBDClient *client,
QTAILQ_INSERT_TAIL(&client->exp->clients, client, next); QTAILQ_INSERT_TAIL(&client->exp->clients, client, next);
nbd_export_get(client->exp); nbd_export_get(client->exp);
nbd_check_meta_export_name(client); nbd_check_meta_export(client);
return 0; return 0;
} }
@ -650,7 +649,7 @@ static int nbd_negotiate_handle_info(NBDClient *client, uint16_t myflags,
client->exp = exp; client->exp = exp;
QTAILQ_INSERT_TAIL(&client->exp->clients, client, next); QTAILQ_INSERT_TAIL(&client->exp->clients, client, next);
nbd_export_get(client->exp); nbd_export_get(client->exp);
nbd_check_meta_export_name(client); nbd_check_meta_export(client);
rc = 1; rc = 1;
} }
return rc; return rc;
@ -835,7 +834,7 @@ static int nbd_negotiate_meta_queries(NBDClient *client,
NBDExportMetaContexts *meta, Error **errp) NBDExportMetaContexts *meta, Error **errp)
{ {
int ret; int ret;
NBDExport *exp; char export_name[NBD_MAX_NAME_SIZE + 1];
NBDExportMetaContexts local_meta; NBDExportMetaContexts local_meta;
uint32_t nb_queries; uint32_t nb_queries;
int i; int i;
@ -854,15 +853,15 @@ static int nbd_negotiate_meta_queries(NBDClient *client,
memset(meta, 0, sizeof(*meta)); memset(meta, 0, sizeof(*meta));
ret = nbd_opt_read_name(client, meta->export_name, NULL, errp); ret = nbd_opt_read_name(client, export_name, NULL, errp);
if (ret <= 0) { if (ret <= 0) {
return ret; return ret;
} }
exp = nbd_export_find(meta->export_name); meta->exp = nbd_export_find(export_name);
if (exp == NULL) { if (meta->exp == NULL) {
return nbd_opt_drop(client, NBD_REP_ERR_UNKNOWN, errp, return nbd_opt_drop(client, NBD_REP_ERR_UNKNOWN, errp,
"export '%s' not present", meta->export_name); "export '%s' not present", export_name);
} }
ret = nbd_opt_read(client, &nb_queries, sizeof(nb_queries), errp); ret = nbd_opt_read(client, &nb_queries, sizeof(nb_queries), errp);
@ -871,7 +870,7 @@ static int nbd_negotiate_meta_queries(NBDClient *client,
} }
cpu_to_be32s(&nb_queries); cpu_to_be32s(&nb_queries);
trace_nbd_negotiate_meta_context(nbd_opt_lookup(client->opt), trace_nbd_negotiate_meta_context(nbd_opt_lookup(client->opt),
meta->export_name, nb_queries); export_name, nb_queries);
if (client->opt == NBD_OPT_LIST_META_CONTEXT && !nb_queries) { if (client->opt == NBD_OPT_LIST_META_CONTEXT && !nb_queries) {
/* enable all known contexts */ /* enable all known contexts */