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From: Marc Dionne <marc.dionne@your-file-system.com>
Date: Wed, 18 Jun 2014 13:06:39 +0000 (-0400)
Subject: Linux 3.16: Convert to new write_iter/read_iter ops
X-Git-Tag: openafs-stable-1_6_10pre1~76
X-Git-Url: http://git.openafs.org/?p=openafs.git;a=commitdiff_plain;h=f3c0f74186f4a323ffc5f125d961fe384d396cac
Linux 3.16: Convert to new write_iter/read_iter ops
Change read/write operations to the new write_iter/read_iter
operations.
Reviewed-on: http://gerrit.openafs.org/11303
Reviewed-by: Chas Williams - CONTRACTOR <chas@cmf.nrl.navy.mil>
Tested-by: Chas Williams - CONTRACTOR <chas@cmf.nrl.navy.mil>
Reviewed-by: Jeffrey Altman <jaltman@your-file-system.com>
Tested-by: Jeffrey Altman <jaltman@your-file-system.com>
(cherry picked from commit a303bb257ed9e790d8c14644779e9508167887b6)
Change-Id: I3f66104be067698a4724ed78537765cf26d4aa10
Reviewed-on: http://gerrit.openafs.org/11309
Reviewed-by: Chas Williams - CONTRACTOR <chas@cmf.nrl.navy.mil>
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Stephan Wiesand <stephan.wiesand@desy.de>
---
diff --git a/acinclude.m4 b/acinclude.m4
index 83a1a8c..13d70db 100644
--- a/acinclude.m4
+++ b/acinclude.m4
@@ -836,6 +836,7 @@ case $AFS_SYSNAME in *_linux* | *_umlinux*)
AC_CHECK_LINUX_STRUCT([inode], [i_security], [fs.h])
AC_CHECK_LINUX_STRUCT([file_operations], [flock], [fs.h])
AC_CHECK_LINUX_STRUCT([file_operations], [iterate], [fs.h])
+ AC_CHECK_LINUX_STRUCT([file_operations], [read_iter], [fs.h])
AC_CHECK_LINUX_STRUCT([file_operations], [sendfile], [fs.h])
AC_CHECK_LINUX_STRUCT([file_system_type], [mount], [fs.h])
AC_CHECK_LINUX_STRUCT([inode_operations], [truncate], [fs.h])
diff --git a/src/afs/LINUX/osi_vnodeops.c b/src/afs/LINUX/osi_vnodeops.c
index 441cce7..818debe 100644
--- a/src/afs/LINUX/osi_vnodeops.c
+++ b/src/afs/LINUX/osi_vnodeops.c
@@ -99,8 +99,11 @@ afs_linux_VerifyVCache(struct vcache *avc, cred_t **retcred) {
return afs_convert_code(code);
}
-#ifdef HAVE_LINUX_GENERIC_FILE_AIO_READ
-# ifdef LINUX_HAS_NONVECTOR_AIO
+#if defined(STRUCT_FILE_OPERATIONS_HAS_READ_ITER) || defined(HAVE_LINUX_GENERIC_FILE_AIO_READ)
+# if defined(STRUCT_FILE_OPERATIONS_HAS_READ_ITER)
+static ssize_t
+afs_linux_read_iter(struct kiocb *iocb, struct iov_iter *iter)
+# elif defined(LINUX_HAS_NONVECTOR_AIO)
static ssize_t
afs_linux_aio_read(struct kiocb *iocb, char __user *buf, size_t bufsize,
loff_t pos)
@@ -113,6 +116,11 @@ afs_linux_aio_read(struct kiocb *iocb, const struct iovec *buf,
struct file *fp = iocb->ki_filp;
ssize_t code = 0;
struct vcache *vcp = VTOAFS(fp->f_dentry->d_inode);
+# if defined(STRUCT_FILE_OPERATIONS_HAS_READ_ITER)
+ loff_t pos = iocb->ki_pos;
+ unsigned long bufsize = iter->nr_segs;
+# endif
+
AFS_GLOCK();
afs_Trace4(afs_iclSetp, CM_TRACE_AIOREADOP, ICL_TYPE_POINTER, vcp,
@@ -125,7 +133,11 @@ afs_linux_aio_read(struct kiocb *iocb, const struct iovec *buf,
* so we optimise by not using it */
osi_FlushPages(vcp, NULL); /* ensure stale pages are gone */
AFS_GUNLOCK();
+# if defined(STRUCT_FILE_OPERATIONS_HAS_READ_ITER)
+ code = generic_file_read_iter(iocb, iter);
+# else
code = generic_file_aio_read(iocb, buf, bufsize, pos);
+# endif
AFS_GLOCK();
}
@@ -170,8 +182,11 @@ afs_linux_read(struct file *fp, char *buf, size_t count, loff_t * offp)
* also take care of re-positioning the pointer if file is open in append
* mode. Call fake open/close to ensure we do writes of core dumps.
*/
-#ifdef HAVE_LINUX_GENERIC_FILE_AIO_READ
-# ifdef LINUX_HAS_NONVECTOR_AIO
+#if defined(STRUCT_FILE_OPERATIONS_HAS_READ_ITER) || defined(HAVE_LINUX_GENERIC_FILE_AIO_READ)
+# if defined(STRUCT_FILE_OPERATIONS_HAS_READ_ITER)
+static ssize_t
+afs_linux_write_iter(struct kiocb *iocb, struct iov_iter *iter)
+# elif defined(LINUX_HAS_NONVECTOR_AIO)
static ssize_t
afs_linux_aio_write(struct kiocb *iocb, const char __user *buf, size_t bufsize,
loff_t pos)
@@ -184,6 +199,10 @@ afs_linux_aio_write(struct kiocb *iocb, const struct iovec *buf,
ssize_t code = 0;
struct vcache *vcp = VTOAFS(iocb->ki_filp->f_dentry->d_inode);
cred_t *credp;
+# if defined(STRUCT_FILE_OPERATIONS_HAS_READ_ITER)
+ loff_t pos = iocb->ki_pos;
+ unsigned long bufsize = iter->nr_segs;
+# endif
AFS_GLOCK();
@@ -199,7 +218,11 @@ afs_linux_aio_write(struct kiocb *iocb, const struct iovec *buf,
ReleaseWriteLock(&vcp->lock);
if (code == 0) {
AFS_GUNLOCK();
+# if defined(STRUCT_FILE_OPERATIONS_HAS_READ_ITER)
+ code = generic_file_write_iter(iocb, iter);
+# else
code = generic_file_aio_write(iocb, buf, bufsize, pos);
+# endif
AFS_GLOCK();
}
@@ -788,7 +811,12 @@ struct file_operations afs_dir_fops = {
};
struct file_operations afs_file_fops = {
-#ifdef HAVE_LINUX_GENERIC_FILE_AIO_READ
+#ifdef STRUCT_FILE_OPERATIONS_HAS_READ_ITER
+ .read_iter = afs_linux_read_iter,
+ .write_iter = afs_linux_write_iter,
+ .read = new_sync_read,
+ .write = new_sync_write,
+#elif defined(HAVE_LINUX_GENERIC_FILE_AIO_READ)
.aio_read = afs_linux_aio_read,
.aio_write = afs_linux_aio_write,
.read = do_sync_read,
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