Displaying 20 results from an estimated 66 matches for "num_sectors".
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nr_sectors
2018 Jun 06
10
[PATCH v6] virtio_blk: add DISCARD and WRIET ZEROES commands support
...ort.
While here, using 16 bytes descriptor to describe one segment of DISCARD
or WRITE ZEROES commands, each command may contain one or more decriptors.
The following data structure shows the definition of one descriptor:
struct virtio_blk_discard_write_zeroes {
le64 sector;
le32 num_sectors;
le32 unmap;
};
Field 'sector' means the start sector for DISCARD and WRITE ZEROES,
filed 'num_sectors' means the number of sectors for DISCARD and WRITE
ZEROES, if both DISCARD and WRITE ZEROES are supported, field 'unmap'
maybe used for WRITE ZEROES command with D...
2018 Jun 06
10
[PATCH v6] virtio_blk: add DISCARD and WRIET ZEROES commands support
...ort.
While here, using 16 bytes descriptor to describe one segment of DISCARD
or WRITE ZEROES commands, each command may contain one or more decriptors.
The following data structure shows the definition of one descriptor:
struct virtio_blk_discard_write_zeroes {
le64 sector;
le32 num_sectors;
le32 unmap;
};
Field 'sector' means the start sector for DISCARD and WRITE ZEROES,
filed 'num_sectors' means the number of sectors for DISCARD and WRITE
ZEROES, if both DISCARD and WRITE ZEROES are supported, field 'unmap'
maybe used for WRITE ZEROES command with D...
2020 Jul 30
0
[PATCH] virtio-blk: fix discard buffer overrun
...rtio_blk.c
> index 980df853ee49..248c8f46b51c 100644
> --- a/drivers/block/virtio_blk.c
> +++ b/drivers/block/virtio_blk.c
> @@ -130,12 +130,19 @@ static int virtblk_setup_discard_write_zeroes(struct request *req, bool unmap)
> u64 sector = bio->bi_iter.bi_sector;
> u32 num_sectors = bio->bi_iter.bi_size >> SECTOR_SHIFT;
>
> - range[n].flags = cpu_to_le32(flags);
> - range[n].num_sectors = cpu_to_le32(num_sectors);
> - range[n].sector = cpu_to_le64(sector);
> + if (n < segments) {
> + range[n].flags = cpu_to_le32(flags);
> + range[n...
2018 Nov 01
0
[PATCH v8] virtio_blk: add discard and write zeroes support
..., 2018 at 10:47:16AM -0400, Michael S. Tsirkin wrote:
> > On Fri, Oct 26, 2018 at 09:08:38AM +0100, Stefan Hajnoczi wrote:
> > > On Fri, Oct 12, 2018 at 02:06:28PM -0700, Daniel Verkamp wrote:
> > > > + range[n].flags = cpu_to_le32(flags);
> > > > + range[n].num_sectors = cpu_to_le32(num_sectors);
> > > > + range[n].sector = cpu_to_le64(sector);
> > > ...
> > > > +/* Discard/write zeroes range for each request. */
> > > > +struct virtio_blk_discard_write_zeroes {
> > > > + /* discard/write zeroes start sect...
2018 Mar 30
2
[PATCH v3] virtio_blk: add DISCARD and WRIET ZEROES command support
...truct virtio_blk_discard_write_zeroes *range;
+ struct bio *bio;
+
+ if (block_size < 512 || !block_size)
+ return -1;
+
+ range = kmalloc_array(segments, sizeof(*range), GFP_ATOMIC);
+ if (!range)
+ return -1;
+
+ __rq_for_each_bio(bio, req) {
+ u64 sector = bio->bi_iter.bi_sector;
+ u32 num_sectors = bio->bi_iter.bi_size >> 9;
+
+ range[n].flags.unmap = cpu_to_le32(unmap);
+ range[n].flags.reserved = cpu_to_le32(0);
+ range[n].num_sectors = cpu_to_le32(num_sectors);
+ range[n].sector = cpu_to_le64(sector);
+ n++;
+ }
+
+ if (WARN_ON_ONCE(n != segments)) {
+ kfree(range);
+ ret...
2018 Mar 30
2
[PATCH v3] virtio_blk: add DISCARD and WRIET ZEROES command support
...truct virtio_blk_discard_write_zeroes *range;
+ struct bio *bio;
+
+ if (block_size < 512 || !block_size)
+ return -1;
+
+ range = kmalloc_array(segments, sizeof(*range), GFP_ATOMIC);
+ if (!range)
+ return -1;
+
+ __rq_for_each_bio(bio, req) {
+ u64 sector = bio->bi_iter.bi_sector;
+ u32 num_sectors = bio->bi_iter.bi_size >> 9;
+
+ range[n].flags.unmap = cpu_to_le32(unmap);
+ range[n].flags.reserved = cpu_to_le32(0);
+ range[n].num_sectors = cpu_to_le32(num_sectors);
+ range[n].sector = cpu_to_le64(sector);
+ n++;
+ }
+
+ if (WARN_ON_ONCE(n != segments)) {
+ kfree(range);
+ ret...
2018 May 29
0
[PATCH v5] virtio_blk: add DISCARD and WRIET ZEROES commands support
...ort.
While here, using 16 bytes descriptor to describe one segment of DISCARD
or WRITE ZEROES commands, each command may contain one or more decriptors.
The following data structure shows the definition of one descriptor:
struct virtio_blk_discard_write_zeroes {
le64 sector;
le32 num_sectors;
le32 unmap;
};
Field 'sector' means the start sector for DISCARD and WRITE ZEROES,
filed 'num_sectors' means the number of sectors for DISCARD and WRITE
ZEROES, if both DISCARD and WRITE ZEROES are supported, field 'unmap'
maybe used for WRITE ZEROES command with D...
2018 May 29
0
[PATCH v5] virtio_blk: add DISCARD and WRIET ZEROES commands support
...ort.
While here, using 16 bytes descriptor to describe one segment of DISCARD
or WRITE ZEROES commands, each command may contain one or more decriptors.
The following data structure shows the definition of one descriptor:
struct virtio_blk_discard_write_zeroes {
le64 sector;
le32 num_sectors;
le32 unmap;
};
Field 'sector' means the start sector for DISCARD and WRITE ZEROES,
filed 'num_sectors' means the number of sectors for DISCARD and WRITE
ZEROES, if both DISCARD and WRITE ZEROES are supported, field 'unmap'
maybe used for WRITE ZEROES command with D...
2018 May 29
2
[PATCH v4] virtio_blk: add DISCARD and WRIET ZEROES commands support
...ort.
While here, using 16 bytes descriptor to describe one segment of DISCARD
or WRITE ZEROES commands, each command may contain one or more decriptors.
The following data structure shows the definition of one descriptor:
struct virtio_blk_discard_write_zeroes {
le64 sector;
le32 num_sectors;
le32 unmap;
};
Field 'sector' means the start sector for DISCARD and WRITE ZEROES,
filed 'num_sectors' means the number of sectors for DISCARD and WRITE
ZEROES, if both DISCARD and WRITE ZEROES are supported, field 'unmap'
maybe used for WRITE ZEROES command with D...
2018 May 29
2
[PATCH v4] virtio_blk: add DISCARD and WRIET ZEROES commands support
...ort.
While here, using 16 bytes descriptor to describe one segment of DISCARD
or WRITE ZEROES commands, each command may contain one or more decriptors.
The following data structure shows the definition of one descriptor:
struct virtio_blk_discard_write_zeroes {
le64 sector;
le32 num_sectors;
le32 unmap;
};
Field 'sector' means the start sector for DISCARD and WRITE ZEROES,
filed 'num_sectors' means the number of sectors for DISCARD and WRITE
ZEROES, if both DISCARD and WRITE ZEROES are supported, field 'unmap'
maybe used for WRITE ZEROES command with D...
2018 Nov 01
1
[PATCH v9] virtio_blk: add discard and write zeroes support
...> +
> + if (unmap)
> + flags |= VIRTIO_BLK_WRITE_ZEROES_FLAG_UNMAP;
> +
> + range = kmalloc_array(segments, sizeof(*range), GFP_ATOMIC);
> + if (!range)
> + return -ENOMEM;
> +
> + __rq_for_each_bio(bio, req) {
> + u64 sector = bio->bi_iter.bi_sector;
> + u32 num_sectors = bio->bi_iter.bi_size >> SECTOR_SHIFT;
> +
> + range[n].flags = cpu_to_le32(flags);
> + range[n].num_sectors = cpu_to_le32(num_sectors);
> + range[n].sector = cpu_to_le64(sector);
> + n++;
> + }
> +
> + req->special_vec.bv_page = virt_to_page(range);
> +...
2018 Jun 07
2
[PATCH v6] virtio_blk: add DISCARD and WRIET ZEROES commands support
...SCARD
> > or WRITE ZEROES commands, each command may contain one or more
> decriptors.
> >
> > The following data structure shows the definition of one descriptor:
> >
> > struct virtio_blk_discard_write_zeroes {
> > le64 sector;
> > le32 num_sectors;
> > le32 unmap;
> > };
> >
> > Field 'sector' means the start sector for DISCARD and WRITE ZEROES,
> > filed 'num_sectors' means the number of sectors for DISCARD and WRITE
> > ZEROES, if both DISCARD and WRITE ZEROES are supported, field...
2018 Jun 07
2
[PATCH v6] virtio_blk: add DISCARD and WRIET ZEROES commands support
...SCARD
> > or WRITE ZEROES commands, each command may contain one or more
> decriptors.
> >
> > The following data structure shows the definition of one descriptor:
> >
> > struct virtio_blk_discard_write_zeroes {
> > le64 sector;
> > le32 num_sectors;
> > le32 unmap;
> > };
> >
> > Field 'sector' means the start sector for DISCARD and WRITE ZEROES,
> > filed 'num_sectors' means the number of sectors for DISCARD and WRITE
> > ZEROES, if both DISCARD and WRITE ZEROES are supported, field...
2018 Mar 30
0
[PATCH v3] virtio_blk: add DISCARD and WRIET ZEROES command support
...etty large: with 64K segments it looks like you are
trying to allocate ~1Mbyte with GFP_ATOMIC which is unlikely to succeed.
Can we split this up in chunks?
> + if (!range)
> + return -1;
> +
> + __rq_for_each_bio(bio, req) {
> + u64 sector = bio->bi_iter.bi_sector;
> + u32 num_sectors = bio->bi_iter.bi_size >> 9;
why 9?
> +
> + range[n].flags.unmap = cpu_to_le32(unmap);
> + range[n].flags.reserved = cpu_to_le32(0);
> + range[n].num_sectors = cpu_to_le32(num_sectors);
> + range[n].sector = cpu_to_le64(sector);
Isn't this causing sparse warnings?...
2018 Oct 12
0
[PATCH v8] virtio_blk: add discard and write zeroes support
...ite_zeroes *range;
+ struct bio *bio;
+ u32 flags = 0;
+
+ if (unmap)
+ flags |= VIRTIO_BLK_WRITE_ZEROES_FLAG_UNMAP;
+
+ range = kmalloc_array(segments, sizeof(*range), GFP_ATOMIC);
+ if (!range)
+ return -ENOMEM;
+
+ __rq_for_each_bio(bio, req) {
+ u64 sector = bio->bi_iter.bi_sector;
+ u32 num_sectors = bio->bi_iter.bi_size >> SECTOR_SHIFT;
+
+ range[n].flags = cpu_to_le32(flags);
+ range[n].num_sectors = cpu_to_le32(num_sectors);
+ range[n].sector = cpu_to_le64(sector);
+ n++;
+ }
+
+ req->special_vec.bv_page = virt_to_page(range);
+ req->special_vec.bv_offset = offset_in_pag...
2018 Nov 01
0
[PATCH v9] virtio_blk: add discard and write zeroes support
...ite_zeroes *range;
+ struct bio *bio;
+ u32 flags = 0;
+
+ if (unmap)
+ flags |= VIRTIO_BLK_WRITE_ZEROES_FLAG_UNMAP;
+
+ range = kmalloc_array(segments, sizeof(*range), GFP_ATOMIC);
+ if (!range)
+ return -ENOMEM;
+
+ __rq_for_each_bio(bio, req) {
+ u64 sector = bio->bi_iter.bi_sector;
+ u32 num_sectors = bio->bi_iter.bi_size >> SECTOR_SHIFT;
+
+ range[n].flags = cpu_to_le32(flags);
+ range[n].num_sectors = cpu_to_le32(num_sectors);
+ range[n].sector = cpu_to_le64(sector);
+ n++;
+ }
+
+ req->special_vec.bv_page = virt_to_page(range);
+ req->special_vec.bv_offset = offset_in_pag...
2018 Jun 11
1
[PATCH v6] virtio_blk: add DISCARD and WRIET ZEROES commands support
...or more
> > > decriptors.
> > > >
> > > > The following data structure shows the definition of one descriptor:
> > > >
> > > > struct virtio_blk_discard_write_zeroes {
> > > > le64 sector;
> > > > le32 num_sectors;
> > > > le32 unmap;
> > > > };
> > > >
> > > > Field 'sector' means the start sector for DISCARD and WRITE ZEROES,
> > > > filed 'num_sectors' means the number of sectors for DISCARD and WRITE
> > > > Z...
2007 Apr 18
0
[RFC/PATCH LGUEST X86_64 08/13] lguest64 user header.
...initrd_size;
+ char cmdline[256];
+};
+
+struct lguest_block_page
+{
+ /* 0 is a read, 1 is a write. */
+ int type;
+ u32 sector; /* Offset in device = sector * 512. */
+ u32 bytes; /* Length expected to be read/written in bytes */
+ /* 0 = pending, 1 = done, 2 = done, error */
+ int result;
+ u32 num_sectors; /* Disk length = num_sectors * 512 */
+};
+
+/* There is a shared page of these. */
+struct lguest_net
+{
+ union {
+ unsigned char mac[6];
+ struct {
+ u8 promisc;
+ u8 pad;
+ u16 guestid;
+ };
+ };
+};
+
+/* lguest_device_desc->type */
+#define LGUEST_DEVICE_T_CONSOLE 1
+#define LGUE...
2007 Apr 05
0
Patch: Add io.c functions, and vfat library
...ibfat to read
files off it. Here is an example:
typedef struct filedesc {
diskinfo* disk_info;
part_entry* partition;
} filedesc;
static filedesc rFd;
static int fat_disk_read_handle(intptr_t fdp, void* buf, size_t nbyte,
libfat_sector_t sector)
{
filedesc* fd = (filedesc*) fdp;
int num_sectors = nbyte / LIBFAT_SECTOR_SIZE;
int status;
sector += fd->partition->start_lba;
status = syslinux_read_disk(fd->disk_info, buf, sector, num_sectors);
return (status) ? 0 : nbyte;
}
and in some function like main():
/* Get the disk geometry (not needed for MBR) */
if ( s...
2007 Apr 18
0
[RFC/PATCH LGUEST X86_64 08/13] lguest64 user header.
...initrd_size;
+ char cmdline[256];
+};
+
+struct lguest_block_page
+{
+ /* 0 is a read, 1 is a write. */
+ int type;
+ u32 sector; /* Offset in device = sector * 512. */
+ u32 bytes; /* Length expected to be read/written in bytes */
+ /* 0 = pending, 1 = done, 2 = done, error */
+ int result;
+ u32 num_sectors; /* Disk length = num_sectors * 512 */
+};
+
+/* There is a shared page of these. */
+struct lguest_net
+{
+ union {
+ unsigned char mac[6];
+ struct {
+ u8 promisc;
+ u8 pad;
+ u16 guestid;
+ };
+ };
+};
+
+/* lguest_device_desc->type */
+#define LGUEST_DEVICE_T_CONSOLE 1
+#define LGUE...