probe::ioblock.request — Fires whenever making a generic block I/O request.
ioblock.request
flagssee 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
rwbinary trace for read/write request
sectorbeginning sector for the entire bio
inoi-node number of the mapped file
sizetotal size in bytes
hw_segmentsnumber of segments after physical and DMA remapping hardware coalescing is performed
namename of the probe point
phys_segmentsnumber of segments in this bio after physical address coalescing is performed
opfoperations and flags
idxoffset into the bio vector array
devnameblock device name
vcntbio vector count which represents number of array element (page, offset, length) which make up this I/O request
bdevtarget block device
bdev_containspoints to the device object which contains the partition (when bio structure represents a partition)
p_start_sectpoints to the start sector of the partition structure of the device