NAMEio_submit - submit asynchronous I/O blocks for processing
SYNOPSIS#include <libaio.h> int io_submit(aio_context_t ctx_id, long nr, struct iocb **iocbpp); Link with -laio.
DESCRIPTIONio_submit() queues nr I/O request blocks for processing in the AIO context ctx_id. iocbpp should be an array of nr AIO control blocks, which will be submitted to context ctx_id.
RETURN VALUEOn success, io_submit() returns the number of iocbs submitted (which may be 0 if nr is zero). For the failure return, see NOTES.
ERRORSEAGAIN Insufficient resources are available to queue any iocbs. EBADF The file descriptor specified in the first iocb is invalid. EFAULT One of the data structures points to invalid data. EINVAL The aio_context specified by ctx_id is invalid. nr is less than 0. The iocb at *iocbpp is not properly initialized, or the operation specified is invalid for the file descriptor in the iocb. ENOSYS io_submit() is not implemented on this architecture.
VERSIONSThe asynchronous I/O system calls first appeared in Linux 2.5, August 2002.
CONFORMING TOio_submit() is Linux-specific and should not be used in programs that are intended to be portable.
NOTESGlibc does not provide a wrapper function for this system call. The wrapper provided in libaio for io_submit() does not follow the usual C library conventions for indicating error: on error it returns a negated error number (the negative of one of the values listed in ERRORS). If the system call is invoked via syscall(2), then the return value follows the usual conventions for indicating an error: -1, with errno set to a (positive) value that indicates the error.
SEE ALSOio_cancel(2), io_destroy(2), io_getevents(2), io_setup(2)
COLOPHONThis page is part of release 3.27 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at //www.kernel.org/doc/man-pages/. IO_SUBMIT(2)