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linux: provide read and write ops even when we have aio

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read/write will fall back to aio ops but e.g. writev will
fail if there is not either a write or writev op explicitly.

force the fallback via do_sync_read/do_sync_write

required with 2.6.18-348.x rhel kernels but probably not newer ones

Reviewed-on: http://gerrit.openafs.org/10246
Reviewed-by: Marc Dionne <marc.c.dionne@gmail.com>
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Derrick Brashear <shadow@your-file-system.com>
Tested-by: Derrick Brashear <shadow@your-file-system.com>
(cherry picked from commit e6af2ffc86af17c4be427384467c4122fc5301b3)

Change-Id: I1b10a6428b1975ef5c76e1ff40217758ff7d90d9
Reviewed-on: http://gerrit.openafs.org/10248
Reviewed-by: Stephan Wiesand <stephan.wiesand@desy.de>
Reviewed-by: Marc Dionne <marc.c.dionne@gmail.com>
Reviewed-by: Jason Edgecombe <jason@rampaginggeek.com>
Tested-by: BuildBot <buildbot@rampaginggeek.com>
This commit is contained in:
Derrick Brashear 2013-09-12 08:09:34 -04:00 committed by Stephan Wiesand
parent ccc7a46b41
commit ae8c311e20
2 changed files with 5 additions and 0 deletions
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1
acinclude.m4
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@ -820,6 +820,7 @@ case $AFS_SYSNAME in *_linux* | *_umlinux*)
AC_CHECK_LINUX_STRUCT([cred], [session_keyring], [cred.h])
AC_CHECK_LINUX_STRUCT([ctl_table], [ctl_name], [sysctl.h])
AC_CHECK_LINUX_STRUCT([dentry_operations], [d_automount], [dcache.h])
AC_CHECK_LINUX_STRUCT([file_operations], [writev], [fs.h])
AC_CHECK_LINUX_STRUCT([inode], [i_alloc_sem], [fs.h])
AC_CHECK_LINUX_STRUCT([inode], [i_blkbits], [fs.h])
AC_CHECK_LINUX_STRUCT([inode], [i_blksize], [fs.h])

4
src/afs/LINUX/osi_vnodeops.c
View File

@ -791,6 +791,10 @@ struct file_operations afs_file_fops = {
#ifdef HAVE_LINUX_GENERIC_FILE_AIO_READ
.aio_read = afs_linux_aio_read,
.aio_write = afs_linux_aio_write,
#ifdef STRUCT_FILE_OPERATIONS_HAS_WRITEV
.read = do_sync_read,
.write = do_sync_write,
#endif
#else
.read = afs_linux_read,
.write = afs_linux_write,