BDEV_READ_PAGE(9)                         The Linux VFS                         BDEV_READ_PAGE(9)



NAME
       bdev_read_page - Start reading a page from a block device

SYNOPSIS
       int bdev_read_page(struct block_device * bdev, sector_t sector, struct page * page);

ARGUMENTS
       bdev
           The device to read the page from

       sector
           The offset on the device to read the page to (need not be aligned)

       page
           The page to read

DESCRIPTION
       On entry, the page should be locked. It will be unlocked when the page has been read. If
       the block driver implements rw_page synchronously, that will be true on exit from this
       function, but it need not be.

       Errors returned by this function are usually “soft”, eg out of memory, or queue full;
       callers should try a different route to read this page rather than propagate an error back
       up the stack.

RETURN
       negative errno if an error occurs, 0 if submission was successful.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                         BDEV_READ_PAGE(9)