number of segments after physical and DMA remapping hardware coalescing is performed
name of the probe point
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
block device name
number of bytes transferred
offset into the bio vector array
operations and flags
number of segments in this bio after physical address coalescing is performed.
bio vector count which represents number of array element (page, offset, length) which makes up this I/O request
total size in bytes
beginning sector for the entire bio
binary trace for read/write request
i-node number of the mapped file
0 on success
The process signals the transfer is done.