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[Qemu-devel] [PATCH v2 1/2] block: clean up bdrv_open2 structure a bit
From: |
Christoph Hellwig |
Subject: |
[Qemu-devel] [PATCH v2 1/2] block: clean up bdrv_open2 structure a bit |
Date: |
Wed, 20 Jan 2010 18:13:25 +0100 |
User-agent: |
Mutt/1.3.28i |
Check the whitelist as early as possible instead of continuing the
setup, and move all the error handling code to the end of the
function.
Signed-off-by: Christoph Hellwig <address@hidden>
Index: qemu/block.c
===================================================================
--- qemu.orig/block.c 2010-01-20 17:21:33.000000000 +0100
+++ qemu/block.c 2010-01-20 17:24:22.596006289 +0100
@@ -428,10 +428,16 @@ int bdrv_open2(BlockDriverState *bs, con
drv = find_image_format(filename);
}
}
+
if (!drv) {
ret = -ENOENT;
goto unlink_and_fail;
}
+ if (use_bdrv_whitelist && !bdrv_is_whitelisted(drv)) {
+ ret = -ENOTSUP;
+ goto unlink_and_fail;
+ }
+
bs->drv = drv;
bs->opaque = qemu_mallocz(drv->instance_size);
@@ -453,20 +459,12 @@ int bdrv_open2(BlockDriverState *bs, con
} else {
open_flags = flags & ~(BDRV_O_FILE | BDRV_O_SNAPSHOT);
}
- if (use_bdrv_whitelist && !bdrv_is_whitelisted(drv)) {
- ret = -ENOTSUP;
- } else {
- ret = drv->bdrv_open(bs, filename, open_flags);
- }
+
+ ret = drv->bdrv_open(bs, filename, open_flags);
if (ret < 0) {
- qemu_free(bs->opaque);
- bs->opaque = NULL;
- bs->drv = NULL;
- unlink_and_fail:
- if (bs->is_temporary)
- unlink(filename);
- return ret;
+ goto free_and_fail;
}
+
if (drv->bdrv_getlength) {
bs->total_sectors = bdrv_getlength(bs) >> BDRV_SECTOR_BITS;
}
@@ -499,6 +497,15 @@ int bdrv_open2(BlockDriverState *bs, con
bs->change_cb(bs->change_opaque);
}
return 0;
+
+free_and_fail:
+ qemu_free(bs->opaque);
+ bs->opaque = NULL;
+ bs->drv = NULL;
+unlink_and_fail:
+ if (bs->is_temporary)
+ unlink(filename);
+ return ret;
}
void bdrv_close(BlockDriverState *bs)
- [Qemu-devel] [PATCH v2 1/2] block: clean up bdrv_open2 structure a bit,
Christoph Hellwig <=