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[Qemu-devel] [PATCH 18/30] qcow2: removed cur_nr_sectors field in QCowAI
From: |
Kevin Wolf |
Subject: |
[Qemu-devel] [PATCH 18/30] qcow2: removed cur_nr_sectors field in QCowAIOCB |
Date: |
Mon, 29 Aug 2011 16:53:26 +0200 |
From: Frediano Ziglio <address@hidden>
Signed-off-by: Frediano Ziglio <address@hidden>
Signed-off-by: Kevin Wolf <address@hidden>
---
block/qcow2.c | 98 +++++++++++++++++++++++++--------------------------------
1 files changed, 43 insertions(+), 55 deletions(-)
diff --git a/block/qcow2.c b/block/qcow2.c
index 9f7566f..cc5f409 100644
--- a/block/qcow2.c
+++ b/block/qcow2.c
@@ -381,7 +381,6 @@ typedef struct QCowAIOCB {
int64_t sector_num;
QEMUIOVector *qiov;
int remaining_sectors;
- int cur_nr_sectors; /* number of sectors in current iteration */
uint64_t bytes_done;
uint64_t cluster_offset;
uint8_t *cluster_data;
@@ -399,42 +398,22 @@ static int qcow2_aio_read_cb(QCowAIOCB *acb)
BDRVQcowState *s = bs->opaque;
int index_in_cluster, n1;
int ret;
-
- /* post process the read buffer */
- if (!acb->cluster_offset) {
- /* nothing to do */
- } else if (acb->cluster_offset & QCOW_OFLAG_COMPRESSED) {
- /* nothing to do */
- } else {
- if (s->crypt_method) {
- qcow2_encrypt_sectors(s, acb->sector_num, acb->cluster_data,
- acb->cluster_data, acb->cur_nr_sectors, 0,
&s->aes_decrypt_key);
- qemu_iovec_reset(&acb->hd_qiov);
- qemu_iovec_copy(&acb->hd_qiov, acb->qiov, acb->bytes_done,
- acb->cur_nr_sectors * 512);
- qemu_iovec_from_buffer(&acb->hd_qiov, acb->cluster_data,
- 512 * acb->cur_nr_sectors);
- }
- }
-
- acb->remaining_sectors -= acb->cur_nr_sectors;
- acb->sector_num += acb->cur_nr_sectors;
- acb->bytes_done += acb->cur_nr_sectors * 512;
+ int cur_nr_sectors; /* number of sectors in current iteration */
if (acb->remaining_sectors == 0) {
/* request completed */
return 0;
}
- /* prepare next AIO request */
- acb->cur_nr_sectors = acb->remaining_sectors;
+ /* prepare next request */
+ cur_nr_sectors = acb->remaining_sectors;
if (s->crypt_method) {
- acb->cur_nr_sectors = MIN(acb->cur_nr_sectors,
+ cur_nr_sectors = MIN(cur_nr_sectors,
QCOW_MAX_CRYPT_CLUSTERS * s->cluster_sectors);
}
ret = qcow2_get_cluster_offset(bs, acb->sector_num << 9,
- &acb->cur_nr_sectors, &acb->cluster_offset);
+ &cur_nr_sectors, &acb->cluster_offset);
if (ret < 0) {
return ret;
}
@@ -443,14 +422,14 @@ static int qcow2_aio_read_cb(QCowAIOCB *acb)
qemu_iovec_reset(&acb->hd_qiov);
qemu_iovec_copy(&acb->hd_qiov, acb->qiov, acb->bytes_done,
- acb->cur_nr_sectors * 512);
+ cur_nr_sectors * 512);
if (!acb->cluster_offset) {
if (bs->backing_hd) {
/* read from the base image */
n1 = qcow2_backing_read1(bs->backing_hd, &acb->hd_qiov,
- acb->sector_num, acb->cur_nr_sectors);
+ acb->sector_num, cur_nr_sectors);
if (n1 > 0) {
BLKDBG_EVENT(bs->file, BLKDBG_READ_BACKING_AIO);
qemu_co_mutex_unlock(&s->lock);
@@ -461,11 +440,9 @@ static int qcow2_aio_read_cb(QCowAIOCB *acb)
return ret;
}
}
- return 1;
} else {
/* Note: in this case, no need to wait */
- qemu_iovec_memset(&acb->hd_qiov, 0, 512 * acb->cur_nr_sectors);
- return 1;
+ qemu_iovec_memset(&acb->hd_qiov, 0, 512 * cur_nr_sectors);
}
} else if (acb->cluster_offset & QCOW_OFLAG_COMPRESSED) {
/* add AIO support for compressed blocks ? */
@@ -476,9 +453,7 @@ static int qcow2_aio_read_cb(QCowAIOCB *acb)
qemu_iovec_from_buffer(&acb->hd_qiov,
s->cluster_cache + index_in_cluster * 512,
- 512 * acb->cur_nr_sectors);
-
- return 1;
+ 512 * cur_nr_sectors);
} else {
if ((acb->cluster_offset & 511) != 0) {
return -EIO;
@@ -494,24 +469,37 @@ static int qcow2_aio_read_cb(QCowAIOCB *acb)
g_malloc0(QCOW_MAX_CRYPT_CLUSTERS * s->cluster_size);
}
- assert(acb->cur_nr_sectors <=
+ assert(cur_nr_sectors <=
QCOW_MAX_CRYPT_CLUSTERS * s->cluster_sectors);
qemu_iovec_reset(&acb->hd_qiov);
qemu_iovec_add(&acb->hd_qiov, acb->cluster_data,
- 512 * acb->cur_nr_sectors);
+ 512 * cur_nr_sectors);
}
BLKDBG_EVENT(bs->file, BLKDBG_READ_AIO);
qemu_co_mutex_unlock(&s->lock);
ret = bdrv_co_readv(bs->file,
(acb->cluster_offset >> 9) + index_in_cluster,
- acb->cur_nr_sectors, &acb->hd_qiov);
+ cur_nr_sectors, &acb->hd_qiov);
qemu_co_mutex_lock(&s->lock);
if (ret < 0) {
return ret;
}
+ if (s->crypt_method) {
+ qcow2_encrypt_sectors(s, acb->sector_num, acb->cluster_data,
+ acb->cluster_data, cur_nr_sectors, 0, &s->aes_decrypt_key);
+ qemu_iovec_reset(&acb->hd_qiov);
+ qemu_iovec_copy(&acb->hd_qiov, acb->qiov, acb->bytes_done,
+ cur_nr_sectors * 512);
+ qemu_iovec_from_buffer(&acb->hd_qiov, acb->cluster_data,
+ 512 * cur_nr_sectors);
+ }
}
+ acb->remaining_sectors -= cur_nr_sectors;
+ acb->sector_num += cur_nr_sectors;
+ acb->bytes_done += cur_nr_sectors * 512;
+
return 1;
}
@@ -529,7 +517,6 @@ static QCowAIOCB *qcow2_aio_setup(BlockDriverState *bs,
int64_t sector_num,
acb->bytes_done = 0;
acb->remaining_sectors = nb_sectors;
- acb->cur_nr_sectors = 0;
acb->cluster_offset = 0;
acb->l2meta.nb_clusters = 0;
qemu_co_queue_init(&acb->l2meta.dependent_requests);
@@ -582,18 +569,7 @@ static int qcow2_aio_write_cb(QCowAIOCB *acb)
int index_in_cluster;
int n_end;
int ret;
-
- ret = qcow2_alloc_cluster_link_l2(bs, &acb->l2meta);
-
- run_dependent_requests(s, &acb->l2meta);
-
- if (ret < 0) {
- return ret;
- }
-
- acb->remaining_sectors -= acb->cur_nr_sectors;
- acb->sector_num += acb->cur_nr_sectors;
- acb->bytes_done += acb->cur_nr_sectors * 512;
+ int cur_nr_sectors; /* number of sectors in current iteration */
if (acb->remaining_sectors == 0) {
/* request completed */
@@ -607,7 +583,7 @@ static int qcow2_aio_write_cb(QCowAIOCB *acb)
n_end = QCOW_MAX_CRYPT_CLUSTERS * s->cluster_sectors;
ret = qcow2_alloc_cluster_offset(bs, acb->sector_num << 9,
- index_in_cluster, n_end, &acb->cur_nr_sectors, &acb->l2meta);
+ index_in_cluster, n_end, &cur_nr_sectors, &acb->l2meta);
if (ret < 0) {
return ret;
}
@@ -617,7 +593,7 @@ static int qcow2_aio_write_cb(QCowAIOCB *acb)
qemu_iovec_reset(&acb->hd_qiov);
qemu_iovec_copy(&acb->hd_qiov, acb->qiov, acb->bytes_done,
- acb->cur_nr_sectors * 512);
+ cur_nr_sectors * 512);
if (s->crypt_method) {
if (!acb->cluster_data) {
@@ -629,23 +605,35 @@ static int qcow2_aio_write_cb(QCowAIOCB *acb)
qemu_iovec_to_buffer(&acb->hd_qiov, acb->cluster_data);
qcow2_encrypt_sectors(s, acb->sector_num, acb->cluster_data,
- acb->cluster_data, acb->cur_nr_sectors, 1, &s->aes_encrypt_key);
+ acb->cluster_data, cur_nr_sectors, 1, &s->aes_encrypt_key);
qemu_iovec_reset(&acb->hd_qiov);
qemu_iovec_add(&acb->hd_qiov, acb->cluster_data,
- acb->cur_nr_sectors * 512);
+ cur_nr_sectors * 512);
}
BLKDBG_EVENT(bs->file, BLKDBG_WRITE_AIO);
qemu_co_mutex_unlock(&s->lock);
ret = bdrv_co_writev(bs->file,
(acb->cluster_offset >> 9) + index_in_cluster,
- acb->cur_nr_sectors, &acb->hd_qiov);
+ cur_nr_sectors, &acb->hd_qiov);
qemu_co_mutex_lock(&s->lock);
if (ret < 0) {
return ret;
}
+ ret = qcow2_alloc_cluster_link_l2(bs, &acb->l2meta);
+
+ run_dependent_requests(s, &acb->l2meta);
+
+ if (ret < 0) {
+ return ret;
+ }
+
+ acb->remaining_sectors -= cur_nr_sectors;
+ acb->sector_num += cur_nr_sectors;
+ acb->bytes_done += cur_nr_sectors * 512;
+
return 1;
}
--
1.7.6
- [Qemu-devel] [PATCH 19/30] qcow2: remove l2meta from QCowAIOCB, (continued)
- [Qemu-devel] [PATCH 19/30] qcow2: remove l2meta from QCowAIOCB, Kevin Wolf, 2011/08/29
- [Qemu-devel] [PATCH 13/30] qcow: QCowAIOCB field cleanup, Kevin Wolf, 2011/08/29
- [Qemu-devel] [PATCH 08/30] qemu-img: print error codes when convert fails, Kevin Wolf, 2011/08/29
- [Qemu-devel] [PATCH 15/30] qcow: Remove QCowAIOCB, Kevin Wolf, 2011/08/29
- [Qemu-devel] [PATCH 14/30] qcow: move some blocks of code to avoid useless variable initialization, Kevin Wolf, 2011/08/29
- [Qemu-devel] [PATCH 20/30] qcow2: remove cluster_offset from QCowAIOCB, Kevin Wolf, 2011/08/29
- [Qemu-devel] [PATCH 21/30] qcow2: remove common from QCowAIOCB, Kevin Wolf, 2011/08/29
- [Qemu-devel] [PATCH 25/30] sheepdog: use coroutines, Kevin Wolf, 2011/08/29
- [Qemu-devel] [PATCH 16/30] qcow: remove old #undefined code, Kevin Wolf, 2011/08/29
- [Qemu-devel] [PATCH 17/30] qcow2: Removed unused AIOCB fields, Kevin Wolf, 2011/08/29
- [Qemu-devel] [PATCH 18/30] qcow2: removed cur_nr_sectors field in QCowAIOCB,
Kevin Wolf <=
- [Qemu-devel] [PATCH 22/30] qcow2: reindent and use while before the big jump, Kevin Wolf, 2011/08/29
- [Qemu-devel] [PATCH 23/30] qcow2: Removed QCowAIOCB entirely, Kevin Wolf, 2011/08/29
- [Qemu-devel] [PATCH 30/30] qemu-img: Require larger zero areas for sparse handling, Kevin Wolf, 2011/08/29
- [Qemu-devel] [PATCH 27/30] qcow2: remove unused qcow2_create_refcount_update function, Kevin Wolf, 2011/08/29
- [Qemu-devel] [PATCH 26/30] qcow2: use always stderr for debugging, Kevin Wolf, 2011/08/29
- [Qemu-devel] [PATCH 29/30] block: latency accounting, Kevin Wolf, 2011/08/29
- [Qemu-devel] [PATCH 28/30] block: explicit I/O accounting, Kevin Wolf, 2011/08/29
- [Qemu-devel] [PATCH 24/30] qcow2: remove memory leak, Kevin Wolf, 2011/08/29
- Re: [Qemu-devel] [PULL 00/30] Block patches, Anthony Liguori, 2011/08/29