NAME

       probe::ioblock.request - Fires whenever making a generic block I/O request.

SYNOPSIS

       ioblock.request

VALUES

       rw
           binary trace for read/write request

       bdev_contains
           points to the device object which contains the partition (when bio structure
           represents a partition)

       ino
           i-node number of the mapped file

       sector
           beginning sector for the entire bio

       p_start_sect
           points to the start sector of the partition structure of the device

       size
           total size in bytes

       vcnt
           bio vector count which represents number of array element (page, offset, length) which
           make up this I/O request

       phys_segments
           number of segments in this bio after physical address coalescing is performed

       opf
           operations and flags

       idx
           offset into the bio vector array

       devname
           block device name

       flags
           see below BIO_UPTODATE 0 ok after I/O completion BIO_RW_BLOCK 1 RW_AHEAD set, and
           read/write would block BIO_EOF 2 out-out-bounds error BIO_SEG_VALID 3 nr_hw_seg valid
           BIO_CLONED 4 doesn't own data BIO_BOUNCED 5 bio is a bounce bio BIO_USER_MAPPED 6
           contains user pages BIO_EOPNOTSUPP 7 not supported

       name
           name of the probe point

       bdev
           target block device

       hw_segments
           number of segments after physical and DMA remapping hardware coalescing is performed

CONTEXT

       The process makes block I/O request

SEE ALSO

       tapset::ioblock(3stap)