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block: Convert first_drv to QLIST

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Signed-off-by: Stefan Hajnoczi <stefanha@linux.vnet.ibm.com>
Signed-off-by: Kevin Wolf <kwolf@redhat.com>
This commit is contained in:
Stefan Hajnoczi 2010-04-13 10:29:33 +01:00 committed by Kevin Wolf
parent 85de0ba5e9
commit 8a22f02a88
2 changed files with 13 additions and 11 deletions
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22
block.c
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@ -58,7 +58,8 @@ static int bdrv_write_em(BlockDriverState *bs, int64_t sector_num,
static QTAILQ_HEAD(, BlockDriverState) bdrv_states =
QTAILQ_HEAD_INITIALIZER(bdrv_states);
static BlockDriver *first_drv;
static QLIST_HEAD(, BlockDriver) bdrv_drivers =
QLIST_HEAD_INITIALIZER(bdrv_drivers);
/* If non-zero, use only whitelisted block drivers */
static int use_bdrv_whitelist;
@ -142,8 +143,7 @@ void bdrv_register(BlockDriver *bdrv)
if (!bdrv->bdrv_aio_flush)
bdrv->bdrv_aio_flush = bdrv_aio_flush_em;
bdrv->next = first_drv;
first_drv = bdrv;
QLIST_INSERT_HEAD(&bdrv_drivers, bdrv, list);
}
/* create a new block device (by default it is empty) */
@ -162,9 +162,10 @@ BlockDriverState *bdrv_new(const char *device_name)
BlockDriver *bdrv_find_format(const char *format_name)
{
BlockDriver *drv1;
for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) {
if (!strcmp(drv1->format_name, format_name))
QLIST_FOREACH(drv1, &bdrv_drivers, list) {
if (!strcmp(drv1->format_name, format_name)) {
return drv1;
}
}
return NULL;
}
@ -265,10 +266,11 @@ static BlockDriver *find_protocol(const char *filename)
len = sizeof(protocol) - 1;
memcpy(protocol, filename, len);
protocol[len] = '\0';
for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) {
QLIST_FOREACH(drv1, &bdrv_drivers, list) {
if (drv1->protocol_name &&
!strcmp(drv1->protocol_name, protocol))
!strcmp(drv1->protocol_name, protocol)) {
return drv1;
}
}
return NULL;
}
@ -282,7 +284,7 @@ static BlockDriver *find_hdev_driver(const char *filename)
int score_max = 0, score;
BlockDriver *drv = NULL, *d;
for (d = first_drv; d; d = d->next) {
QLIST_FOREACH(d, &bdrv_drivers, list) {
if (d->bdrv_probe_device) {
score = d->bdrv_probe_device(filename);
if (score > score_max) {
@ -317,7 +319,7 @@ static BlockDriver *find_image_format(const char *filename)
}
score_max = 0;
for(drv1 = first_drv; drv1 != NULL; drv1 = drv1->next) {
QLIST_FOREACH(drv1, &bdrv_drivers, list) {
if (drv1->bdrv_probe) {
score = drv1->bdrv_probe(buf, ret, filename);
if (score > score_max) {
@ -1157,7 +1159,7 @@ void bdrv_iterate_format(void (*it)(void *opaque, const char *name),
{
BlockDriver *drv;
for (drv = first_drv; drv != NULL; drv = drv->next) {
QLIST_FOREACH(drv, &bdrv_drivers, list) {
it(opaque, drv->format_name);
}
}

2
block_int.h
View File

@ -126,7 +126,7 @@ struct BlockDriver {
/* Set if newly created images are not guaranteed to contain only zeros */
int no_zero_init;
struct BlockDriver *next;
QLIST_ENTRY(BlockDriver) list;
};
struct BlockDriverState {