[Qemu-devel] [PATCH 1/5] use qemu_blockalign consistently

[Christoph Hellwig]

Use qemu_blockalign for all allocations in the block layer.  This allows
increasing the required alignment, which is need to support O_DIRECT on
devices with large block sizes.

Signed-off-by: Christoph Hellwig <h...@lst.de>

Index: qemu/hw/scsi-disk.c
===================================================================
--- qemu.orig/hw/scsi-disk.c    2010-09-12 14:42:40.942759377 -0300
+++ qemu/hw/scsi-disk.c 2010-09-12 14:43:04.694759377 -0300
@@ -70,14 +70,15 @@ struct SCSIDiskState
     char *serial;
 };
 
-static SCSIDiskReq *scsi_new_request(SCSIDevice *d, uint32_t tag, uint32_t lun)
+static SCSIDiskReq *scsi_new_request(SCSIDiskState *s, uint32_t tag,
+        uint32_t lun)
 {
     SCSIRequest *req;
     SCSIDiskReq *r;
 
-    req = scsi_req_alloc(sizeof(SCSIDiskReq), d, tag, lun);
+    req = scsi_req_alloc(sizeof(SCSIDiskReq), &s->qdev, tag, lun);
     r = DO_UPCAST(SCSIDiskReq, req, req);
-    r->iov.iov_base = qemu_memalign(512, SCSI_DMA_BUF_SIZE);
+    r->iov.iov_base = qemu_blockalign(s->bs, SCSI_DMA_BUF_SIZE);
     return r;
 }
 
@@ -939,7 +940,7 @@ static int32_t scsi_send_command(SCSIDev
     }
     /* ??? Tags are not unique for different luns.  We only implement a
        single lun, so this should not matter.  */
-    r = scsi_new_request(d, tag, lun);
+    r = scsi_new_request(s, tag, lun);
     outbuf = (uint8_t *)r->iov.iov_base;
     is_write = 0;
     DPRINTF("Command: lun=%d tag=0x%x data=0x%02x", lun, tag, buf[0]);
Index: qemu/hw/sd.c
===================================================================
--- qemu.orig/hw/sd.c   2010-09-12 14:31:04.387759376 -0300
+++ qemu/hw/sd.c        2010-09-12 14:43:04.695759377 -0300
@@ -440,7 +440,7 @@ SDState *sd_init(BlockDriverState *bs, i
     SDState *sd;
 
     sd = (SDState *) qemu_mallocz(sizeof(SDState));
-    sd->buf = qemu_memalign(512, 512);
+    sd->buf = qemu_blockalign(bs, 512);
     sd->spi = is_spi;
     sd->enable = 1;
     sd_reset(sd, bs);
Index: qemu/qemu-io.c
===================================================================
--- qemu.orig/qemu-io.c 2010-09-12 14:31:04.394759376 -0300
+++ qemu/qemu-io.c      2010-09-12 14:43:04.699759377 -0300
@@ -61,7 +61,7 @@ static void *qemu_io_alloc(size_t len, i
 
        if (misalign)
                len += MISALIGN_OFFSET;
-       buf = qemu_memalign(512, len);
+       buf = qemu_blockalign(bs, len);
        memset(buf, pattern, len);
        if (misalign)
                buf += MISALIGN_OFFSET;
Index: qemu/qemu-nbd.c
===================================================================
--- qemu.orig/qemu-nbd.c        2010-09-12 14:31:04.401759376 -0300
+++ qemu/qemu-nbd.c     2010-09-12 14:43:04.706759377 -0300
@@ -446,7 +446,7 @@ int main(int argc, char **argv)
     max_fd = sharing_fds[0];
     nb_fds++;
 
-    data = qemu_memalign(512, NBD_BUFFER_SIZE);
+    data = qemu_blockalign(bs, NBD_BUFFER_SIZE);
     if (data == NULL)
         errx(EXIT_FAILURE, "Cannot allocate data buffer");
 
Index: qemu/posix-aio-compat.c
===================================================================
--- qemu.orig/posix-aio-compat.c        2010-09-12 14:42:46.725759377 -0300
+++ qemu/posix-aio-compat.c     2010-09-12 14:43:04.711759377 -0300
@@ -270,7 +270,7 @@ static ssize_t handle_aiocb_rw(struct qe
      * Ok, we have to do it the hard way, copy all segments into
      * a single aligned buffer.
      */
-    buf = qemu_memalign(512, aiocb->aio_nbytes);
+    buf = qemu_blockalign(aiocb->common.bs, aiocb->aio_nbytes);
     if (aiocb->aio_type & QEMU_AIO_WRITE) {
         char *p = buf;
         int i;