BLK_RQ_MAP_INTEGRITY(9) Block Devices BLK_RQ_MAP_INTEGRITY(9)NAME
blk_rq_map_integrity_sg - Map integrity metadata into a scatterlist
SYNOPSIS
int blk_rq_map_integrity_sg(struct request_queue * q, struct bio * bio, struct scatterlist * sglist);
ARGUMENTS
q
request queue
bio
bio with integrity metadata attached
sglist
target scatterlist
DESCRIPTION
Map the integrity vectors in request into a scatterlist. The scatterlist must be big enough to hold all elements. I.e. sized using
blk_rq_count_integrity_sg.
COPYRIGHT Kernel Hackers Manual 3.10 June 2014 BLK_RQ_MAP_INTEGRITY(9)
Check Out this Related Man Page
USB_SG_INIT(9) USB Core APIs USB_SG_INIT(9)NAME
usb_sg_init - initializes scatterlist-based bulk/interrupt I/O request
SYNOPSIS
int usb_sg_init(struct usb_sg_request * io, struct usb_device * dev, unsigned pipe, unsigned period, struct scatterlist * sg, int nents,
size_t length, gfp_t mem_flags);
ARGUMENTS
io
request block being initialized. until usb_sg_wait returns, treat this as a pointer to an opaque block of memory,
dev
the usb device that will send or receive the data
pipe
endpoint "pipe" used to transfer the data
period
polling rate for interrupt endpoints, in frames or (for high speed endpoints) microframes; ignored for bulk
sg
scatterlist entries
nents
how many entries in the scatterlist
length
how many bytes to send from the scatterlist, or zero to send every byte identified in the list.
mem_flags
SLAB_* flags affecting memory allocations in this call
DESCRIPTION
Returns zero for success, else a negative errno value. This initializes a scatter/gather request, allocating resources such as I/O mappings
and urb memory (except maybe memory used by USB controller drivers).
The request must be issued using usb_sg_wait, which waits for the I/O to complete (or to be canceled) and then cleans up all resources
allocated by usb_sg_init.
The request may be canceled with usb_sg_cancel, either before or after usb_sg_wait is called.
COPYRIGHT Kernel Hackers Manual 2.6. July 2010 USB_SG_INIT(9)
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