diff mbox

[v6,1/4] blockdev: prepare iSCSI block driver for dynamic loading

Message ID 1470147137-21970-2-git-send-email-clord@redhat.com (mailing list archive)
State New, archived
Headers show

Commit Message

clord@redhat.com Aug. 2, 2016, 2:12 p.m. UTC 
This commit moves the initialization of the QemuOptsList qemu_iscsi_opts
struct out of block/iscsi.c in order to allow the iscsi module to be
dynamically loaded.

Signed-off-by: Colin Lord <clord@redhat.com>
Reviewed-by: Fam Zheng <famz@redhat.com>
---
 block/iscsi.c | 36 ------------------------------------
 vl.c          | 38 ++++++++++++++++++++++++++++++++++++++
 2 files changed, 38 insertions(+), 36 deletions(-)

Comments

Stefan Hajnoczi Aug. 8, 2016, 3:18 p.m. UTC | #1 
On Tue, Aug 02, 2016 at 10:12:14AM -0400, Colin Lord wrote:
> diff --git a/vl.c b/vl.c
> index e7c2c62..1a5f807 100644
> --- a/vl.c
> +++ b/vl.c
> @@ -506,6 +506,41 @@ static QemuOptsList qemu_fw_cfg_opts = {
>      },
>  };
>  
> +static QemuOptsList qemu_iscsi_opts = {
> +    .name = "iscsi",
> +    .head = QTAILQ_HEAD_INITIALIZER(qemu_iscsi_opts.head),
> +    .desc = {
> +        {
> +            .name = "user",
> +            .type = QEMU_OPT_STRING,
> +            .help = "username for CHAP authentication to target",
> +        },{
> +            .name = "password",
> +            .type = QEMU_OPT_STRING,
> +            .help = "password for CHAP authentication to target",
> +        },{
> +            .name = "password-secret",
> +            .type = QEMU_OPT_STRING,
> +            .help = "ID of the secret providing password for CHAP "
> +                    "authentication to target",
> +        },{
> +            .name = "header-digest",
> +            .type = QEMU_OPT_STRING,
> +            .help = "HeaderDigest setting. "
> +                    "{CRC32C|CRC32C-NONE|NONE-CRC32C|NONE}",
> +        },{
> +            .name = "initiator-name",
> +            .type = QEMU_OPT_STRING,
> +            .help = "Initiator iqn name to use when connecting",
> +        },{
> +            .name = "timeout",
> +            .type = QEMU_OPT_NUMBER,
> +            .help = "Request timeout in seconds (default 0 = no timeout)",
> +        },
> +        { /* end of list */ }
> +    },
> +};
> +
>  /**
>   * Get machine options
>   *
> @@ -3001,6 +3036,9 @@ int main(int argc, char **argv, char **envp)
>      qemu_add_opts(&qemu_icount_opts);
>      qemu_add_opts(&qemu_semihosting_config_opts);
>      qemu_add_opts(&qemu_fw_cfg_opts);
> +#ifdef CONFIG_LIBISCSI
> +    qemu_add_opts(&qemu_iscsi_opts);
> +#endif

This will probably produce "unused variable" warnings and cause the
build to fail when CONFIG_LIBISCSI is not defined.

In this case I'd add an ifdef around qemu_iscsi_opts.
clord@redhat.com Aug. 8, 2016, 5:54 p.m. UTC | #2 
On 08/08/2016 11:18 AM, Stefan Hajnoczi wrote:
> On Tue, Aug 02, 2016 at 10:12:14AM -0400, Colin Lord wrote:
>> diff --git a/vl.c b/vl.c
>> index e7c2c62..1a5f807 100644
>> --- a/vl.c
>> +++ b/vl.c
>> @@ -506,6 +506,41 @@ static QemuOptsList qemu_fw_cfg_opts = {
>>      },
>>  };
>>  
>> +static QemuOptsList qemu_iscsi_opts = {
>> +    .name = "iscsi",
>> +    .head = QTAILQ_HEAD_INITIALIZER(qemu_iscsi_opts.head),
>> +    .desc = {
>> +        {
>> +            .name = "user",
>> +            .type = QEMU_OPT_STRING,
>> +            .help = "username for CHAP authentication to target",
>> +        },{
>> +            .name = "password",
>> +            .type = QEMU_OPT_STRING,
>> +            .help = "password for CHAP authentication to target",
>> +        },{
>> +            .name = "password-secret",
>> +            .type = QEMU_OPT_STRING,
>> +            .help = "ID of the secret providing password for CHAP "
>> +                    "authentication to target",
>> +        },{
>> +            .name = "header-digest",
>> +            .type = QEMU_OPT_STRING,
>> +            .help = "HeaderDigest setting. "
>> +                    "{CRC32C|CRC32C-NONE|NONE-CRC32C|NONE}",
>> +        },{
>> +            .name = "initiator-name",
>> +            .type = QEMU_OPT_STRING,
>> +            .help = "Initiator iqn name to use when connecting",
>> +        },{
>> +            .name = "timeout",
>> +            .type = QEMU_OPT_NUMBER,
>> +            .help = "Request timeout in seconds (default 0 = no timeout)",
>> +        },
>> +        { /* end of list */ }
>> +    },
>> +};
>> +
>>  /**
>>   * Get machine options
>>   *
>> @@ -3001,6 +3036,9 @@ int main(int argc, char **argv, char **envp)
>>      qemu_add_opts(&qemu_icount_opts);
>>      qemu_add_opts(&qemu_semihosting_config_opts);
>>      qemu_add_opts(&qemu_fw_cfg_opts);
>> +#ifdef CONFIG_LIBISCSI
>> +    qemu_add_opts(&qemu_iscsi_opts);
>> +#endif
> 
> This will probably produce "unused variable" warnings and cause the
> build to fail when CONFIG_LIBISCSI is not defined.
> 
> In this case I'd add an ifdef around qemu_iscsi_opts.
> 
Oddly enough I don't actually get any warnings when iscsi is disabled,
but in any case the ifdef should probably be there anyway so I'll fix
and resubmit.
diff mbox

Patch

diff --git a/block/iscsi.c b/block/iscsi.c
index 95ce9e1..c4a0937 100644
--- a/block/iscsi.c
+++ b/block/iscsi.c
@@ -2010,45 +2010,9 @@  static BlockDriver bdrv_iscsi = {
     .bdrv_attach_aio_context = iscsi_attach_aio_context,
 };
 
-static QemuOptsList qemu_iscsi_opts = {
-    .name = "iscsi",
-    .head = QTAILQ_HEAD_INITIALIZER(qemu_iscsi_opts.head),
-    .desc = {
-        {
-            .name = "user",
-            .type = QEMU_OPT_STRING,
-            .help = "username for CHAP authentication to target",
-        },{
-            .name = "password",
-            .type = QEMU_OPT_STRING,
-            .help = "password for CHAP authentication to target",
-        },{
-            .name = "password-secret",
-            .type = QEMU_OPT_STRING,
-            .help = "ID of the secret providing password for CHAP "
-                    "authentication to target",
-        },{
-            .name = "header-digest",
-            .type = QEMU_OPT_STRING,
-            .help = "HeaderDigest setting. "
-                    "{CRC32C|CRC32C-NONE|NONE-CRC32C|NONE}",
-        },{
-            .name = "initiator-name",
-            .type = QEMU_OPT_STRING,
-            .help = "Initiator iqn name to use when connecting",
-        },{
-            .name = "timeout",
-            .type = QEMU_OPT_NUMBER,
-            .help = "Request timeout in seconds (default 0 = no timeout)",
-        },
-        { /* end of list */ }
-    },
-};
-
 static void iscsi_block_init(void)
 {
     bdrv_register(&bdrv_iscsi);
-    qemu_add_opts(&qemu_iscsi_opts);
 }
 
 block_init(iscsi_block_init);
diff --git a/vl.c b/vl.c
index e7c2c62..1a5f807 100644
--- a/vl.c
+++ b/vl.c
@@ -506,6 +506,41 @@  static QemuOptsList qemu_fw_cfg_opts = {
     },
 };
 
+static QemuOptsList qemu_iscsi_opts = {
+    .name = "iscsi",
+    .head = QTAILQ_HEAD_INITIALIZER(qemu_iscsi_opts.head),
+    .desc = {
+        {
+            .name = "user",
+            .type = QEMU_OPT_STRING,
+            .help = "username for CHAP authentication to target",
+        },{
+            .name = "password",
+            .type = QEMU_OPT_STRING,
+            .help = "password for CHAP authentication to target",
+        },{
+            .name = "password-secret",
+            .type = QEMU_OPT_STRING,
+            .help = "ID of the secret providing password for CHAP "
+                    "authentication to target",
+        },{
+            .name = "header-digest",
+            .type = QEMU_OPT_STRING,
+            .help = "HeaderDigest setting. "
+                    "{CRC32C|CRC32C-NONE|NONE-CRC32C|NONE}",
+        },{
+            .name = "initiator-name",
+            .type = QEMU_OPT_STRING,
+            .help = "Initiator iqn name to use when connecting",
+        },{
+            .name = "timeout",
+            .type = QEMU_OPT_NUMBER,
+            .help = "Request timeout in seconds (default 0 = no timeout)",
+        },
+        { /* end of list */ }
+    },
+};
+
 /**
  * Get machine options
  *
@@ -3001,6 +3036,9 @@  int main(int argc, char **argv, char **envp)
     qemu_add_opts(&qemu_icount_opts);
     qemu_add_opts(&qemu_semihosting_config_opts);
     qemu_add_opts(&qemu_fw_cfg_opts);
+#ifdef CONFIG_LIBISCSI
+    qemu_add_opts(&qemu_iscsi_opts);
+#endif
     module_call_init(MODULE_INIT_OPTS);
 
     runstate_init();