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IO_SUBMIT(2)                  Linux Programmer's Manual                  IO_SUBMIT(2)

NAME         top

       io_submit - submit asynchronous I/O blocks for processing

SYNOPSIS         top

       #include <libaio.h>

       int io_submit(aio_context_t ctx_id, long nr, struct iocb **iocbpp);

       Link with -laio.

DESCRIPTION         top

       io_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 VALUE         top

       On success, io_submit() returns the number of iocbs submitted (which may be 0
       if nr is zero).  For the failure return, see NOTES.

ERRORS         top

       EAGAIN 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[0] 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.

VERSIONS         top

       The asynchronous I/O system calls first appeared in Linux 2.5, August 2002.

CONFORMING TO         top

       io_submit() is Linux-specific and should not be used in programs that are
       intended to be portable.

NOTES         top

       Glibc 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 ALSO         top

       io_cancel(2), io_destroy(2), io_getevents(2), io_setup(2), aio(7)

COLOPHON         top

       This page is part of release 3.32 of the Linux man-pages project.  A
       description of the project, and information about reporting bugs, can be found
       at http://www.kernel.org/doc/man-pages/.

Linux                                 2008-06-18                         IO_SUBMIT(2)

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