Linux 3.1 compat, fops->fsync()
The Linux 3.1 kernel updated the fops->fsync() callback yet again. They now pass the requested range and delegate the responsibility for calling filemap_write_and_wait_range() to the callback. In addition imutex is no longer held by the caller and the callback is responsible for taking the lock if required. This commit updates the code to provide a zpl_fsync() function for the updated API. Implementations for the previous two APIs are also maintained for compatibility. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> Closes #445
This commit is contained in:
Brian Behlendorf
parent
8c19f5b407
commit
adcd70bd1a
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@ -1,20 +1,63 @@
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dnl #
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dnl # 2.6.35 API change
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dnl # The dentry argument was deamed unused and dropped in 2.6.36.
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dnl # Linux 2.6.x - 2.6.34 API
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_FSYNC_2ARGS], [
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AC_MSG_CHECKING([whether fops->fsync() wants 2 args])
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AC_DEFUN([ZFS_AC_KERNEL_FSYNC_WITH_DENTRY], [
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ZFS_LINUX_TRY_COMPILE([
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#include <linux/fs.h>
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],[
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int (*fsync) (struct file *, int datasync) = NULL;
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int (*fsync) (struct file *, struct dentry *, int) = NULL;
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struct file_operations fops __attribute__ ((unused));
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fops.fsync = fsync;
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],[
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AC_MSG_RESULT(yes)
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AC_DEFINE(HAVE_2ARGS_FSYNC, 1, [fops->fsync() want 2 args])
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AC_MSG_RESULT([dentry])
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AC_DEFINE(HAVE_FSYNC_WITH_DENTRY, 1,
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[fops->fsync() with dentry])
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],[
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AC_MSG_RESULT(no)
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])
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])
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dnl #
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dnl # Linux 2.6.35 - Linux 3.0 API
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_FSYNC_WITHOUT_DENTRY], [
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ZFS_LINUX_TRY_COMPILE([
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#include <linux/fs.h>
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],[
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int (*fsync) (struct file *, int) = NULL;
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struct file_operations fops __attribute__ ((unused));
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fops.fsync = fsync;
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],[
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AC_MSG_RESULT([no dentry])
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AC_DEFINE(HAVE_FSYNC_WITHOUT_DENTRY, 1,
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[fops->fsync() without dentry])
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],[
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])
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])
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dnl #
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dnl # Linux 3.1 -x 3.x API
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dnl #
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AC_DEFUN([ZFS_AC_KERNEL_FSYNC_RANGE], [
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ZFS_LINUX_TRY_COMPILE([
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#include <linux/fs.h>
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],[
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int (*fsync) (struct file *, loff_t, loff_t, int) = NULL;
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struct file_operations fops __attribute__ ((unused));
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fops.fsync = fsync;
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],[
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AC_MSG_RESULT([range])
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AC_DEFINE(HAVE_FSYNC_RANGE, 1,
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[fops->fsync() with range])
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],[
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])
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])
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AC_DEFUN([ZFS_AC_KERNEL_FSYNC], [
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AC_MSG_CHECKING([whether fops->fsync() wants])
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ZFS_AC_KERNEL_FSYNC_WITH_DENTRY
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ZFS_AC_KERNEL_FSYNC_WITHOUT_DENTRY
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ZFS_AC_KERNEL_FSYNC_RANGE
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])
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@ -32,7 +32,7 @@ AC_DEFUN([ZFS_AC_CONFIG_KERNEL], [
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ZFS_AC_KERNEL_CONST_XATTR_HANDLER
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ZFS_AC_KERNEL_XATTR_HANDLER_GET
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ZFS_AC_KERNEL_XATTR_HANDLER_SET
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ZFS_AC_KERNEL_FSYNC_2ARGS
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ZFS_AC_KERNEL_FSYNC
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ZFS_AC_KERNEL_EVICT_INODE
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ZFS_AC_KERNEL_INSERT_INODE_LOCKED
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ZFS_AC_KERNEL_D_OBTAIN_ALIAS
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@ -14418,8 +14418,9 @@ fi
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{ $as_echo "$as_me:$LINENO: checking whether fops->fsync() wants 2 args" >&5
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$as_echo_n "checking whether fops->fsync() wants 2 args... " >&6; }
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{ $as_echo "$as_me:$LINENO: checking whether fops->fsync() wants" >&5
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$as_echo_n "checking whether fops->fsync() wants... " >&6; }
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cat confdefs.h - <<_ACEOF >conftest.c
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@ -14436,7 +14437,7 @@ int
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main (void)
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{
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int (*fsync) (struct file *, int datasync) = NULL;
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int (*fsync) (struct file *, struct dentry *, int) = NULL;
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struct file_operations fops __attribute__ ((unused));
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fops.fsync = fsync;
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@ -14462,11 +14463,11 @@ _ACEOF
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$as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
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(exit $ac_status); }; }; then
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{ $as_echo "$as_me:$LINENO: result: yes" >&5
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$as_echo "yes" >&6; }
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{ $as_echo "$as_me:$LINENO: result: dentry" >&5
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$as_echo "dentry" >&6; }
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cat >>confdefs.h <<\_ACEOF
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#define HAVE_2ARGS_FSYNC 1
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#define HAVE_FSYNC_WITH_DENTRY 1
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_ACEOF
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@ -14474,8 +14475,6 @@ else
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$as_echo "$as_me: failed program was:" >&5
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sed 's/^/| /' conftest.$ac_ext >&5
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{ $as_echo "$as_me:$LINENO: result: no" >&5
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$as_echo "no" >&6; }
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@ -14486,6 +14485,135 @@ fi
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cat confdefs.h - <<_ACEOF >conftest.c
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/* confdefs.h. */
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_ACEOF
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cat confdefs.h >>conftest.$ac_ext
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cat >>conftest.$ac_ext <<_ACEOF
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/* end confdefs.h. */
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#include <linux/fs.h>
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int
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main (void)
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{
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int (*fsync) (struct file *, int) = NULL;
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struct file_operations fops __attribute__ ((unused));
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fops.fsync = fsync;
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;
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return 0;
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}
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_ACEOF
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rm -Rf build && mkdir -p build
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echo "obj-m := conftest.o" >build/Makefile
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if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
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{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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$as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
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(exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
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{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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$as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
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(exit $ac_status); }; }; then
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{ $as_echo "$as_me:$LINENO: result: no dentry" >&5
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$as_echo "no dentry" >&6; }
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cat >>confdefs.h <<\_ACEOF
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#define HAVE_FSYNC_WITHOUT_DENTRY 1
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_ACEOF
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else
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$as_echo "$as_me: failed program was:" >&5
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sed 's/^/| /' conftest.$ac_ext >&5
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fi
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rm -Rf build
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cat confdefs.h - <<_ACEOF >conftest.c
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/* confdefs.h. */
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_ACEOF
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cat confdefs.h >>conftest.$ac_ext
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cat >>conftest.$ac_ext <<_ACEOF
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/* end confdefs.h. */
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#include <linux/fs.h>
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int
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main (void)
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{
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int (*fsync) (struct file *, loff_t, loff_t, int) = NULL;
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struct file_operations fops __attribute__ ((unused));
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fops.fsync = fsync;
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;
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return 0;
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}
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_ACEOF
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rm -Rf build && mkdir -p build
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echo "obj-m := conftest.o" >build/Makefile
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if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
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{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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$as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
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(exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
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{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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$as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
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(exit $ac_status); }; }; then
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{ $as_echo "$as_me:$LINENO: result: range" >&5
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$as_echo "range" >&6; }
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cat >>confdefs.h <<\_ACEOF
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#define HAVE_FSYNC_RANGE 1
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_ACEOF
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else
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$as_echo "$as_me: failed program was:" >&5
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sed 's/^/| /' conftest.$ac_ext >&5
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fi
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rm -Rf build
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{ $as_echo "$as_me:$LINENO: checking whether sops->evict_inode() exists" >&5
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$as_echo_n "checking whether sops->evict_inode() exists... " >&6; }
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@ -19027,8 +19155,9 @@ fi
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{ $as_echo "$as_me:$LINENO: checking whether fops->fsync() wants 2 args" >&5
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$as_echo_n "checking whether fops->fsync() wants 2 args... " >&6; }
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{ $as_echo "$as_me:$LINENO: checking whether fops->fsync() wants" >&5
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$as_echo_n "checking whether fops->fsync() wants... " >&6; }
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cat confdefs.h - <<_ACEOF >conftest.c
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@ -19045,7 +19174,7 @@ int
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main (void)
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{
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int (*fsync) (struct file *, int datasync) = NULL;
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int (*fsync) (struct file *, struct dentry *, int) = NULL;
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struct file_operations fops __attribute__ ((unused));
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fops.fsync = fsync;
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@ -19071,11 +19200,11 @@ _ACEOF
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$as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
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(exit $ac_status); }; }; then
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{ $as_echo "$as_me:$LINENO: result: yes" >&5
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$as_echo "yes" >&6; }
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{ $as_echo "$as_me:$LINENO: result: dentry" >&5
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$as_echo "dentry" >&6; }
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cat >>confdefs.h <<\_ACEOF
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#define HAVE_2ARGS_FSYNC 1
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#define HAVE_FSYNC_WITH_DENTRY 1
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_ACEOF
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@ -19083,8 +19212,6 @@ else
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$as_echo "$as_me: failed program was:" >&5
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sed 's/^/| /' conftest.$ac_ext >&5
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{ $as_echo "$as_me:$LINENO: result: no" >&5
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$as_echo "no" >&6; }
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@ -19095,6 +19222,135 @@ fi
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cat confdefs.h - <<_ACEOF >conftest.c
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/* confdefs.h. */
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_ACEOF
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cat confdefs.h >>conftest.$ac_ext
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cat >>conftest.$ac_ext <<_ACEOF
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/* end confdefs.h. */
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#include <linux/fs.h>
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int
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main (void)
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{
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int (*fsync) (struct file *, int) = NULL;
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struct file_operations fops __attribute__ ((unused));
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fops.fsync = fsync;
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;
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return 0;
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}
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_ACEOF
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rm -Rf build && mkdir -p build
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echo "obj-m := conftest.o" >build/Makefile
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if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
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{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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$as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
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(exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
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{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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$as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
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(exit $ac_status); }; }; then
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{ $as_echo "$as_me:$LINENO: result: no dentry" >&5
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$as_echo "no dentry" >&6; }
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cat >>confdefs.h <<\_ACEOF
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#define HAVE_FSYNC_WITHOUT_DENTRY 1
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_ACEOF
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else
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$as_echo "$as_me: failed program was:" >&5
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sed 's/^/| /' conftest.$ac_ext >&5
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fi
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rm -Rf build
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cat confdefs.h - <<_ACEOF >conftest.c
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/* confdefs.h. */
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_ACEOF
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cat confdefs.h >>conftest.$ac_ext
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cat >>conftest.$ac_ext <<_ACEOF
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/* end confdefs.h. */
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#include <linux/fs.h>
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int
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main (void)
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{
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int (*fsync) (struct file *, loff_t, loff_t, int) = NULL;
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struct file_operations fops __attribute__ ((unused));
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fops.fsync = fsync;
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;
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return 0;
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}
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_ACEOF
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rm -Rf build && mkdir -p build
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echo "obj-m := conftest.o" >build/Makefile
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if { ac_try='cp conftest.c build && make modules -C $LINUX_OBJ EXTRA_CFLAGS="-Werror-implicit-function-declaration $EXTRA_KCFLAGS" $ARCH_UM M=$PWD/build'
|
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{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
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(eval $ac_try) 2>&5
|
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ac_status=$?
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$as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
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(exit $ac_status); }; } >/dev/null && { ac_try='test -s build/conftest.o'
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{ (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
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(eval $ac_try) 2>&5
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ac_status=$?
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$as_echo "$as_me:$LINENO: \$? = $ac_status" >&5
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(exit $ac_status); }; }; then
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{ $as_echo "$as_me:$LINENO: result: range" >&5
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$as_echo "range" >&6; }
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cat >>confdefs.h <<\_ACEOF
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#define HAVE_FSYNC_RANGE 1
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_ACEOF
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|
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else
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$as_echo "$as_me: failed program was:" >&5
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sed 's/^/| /' conftest.$ac_ext >&5
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fi
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rm -Rf build
|
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|
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|
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|
||||
|
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{ $as_echo "$as_me:$LINENO: checking whether sops->evict_inode() exists" >&5
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$as_echo_n "checking whether sops->evict_inode() exists... " >&6; }
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|
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@ -76,27 +76,16 @@ zpl_readdir(struct file *filp, void *dirent, filldir_t filldir)
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return (error);
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}
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|
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#if defined(HAVE_FSYNC_WITH_DENTRY)
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/*
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* 2.6.35 API change,
|
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* As of 2.6.35 the dentry argument to the .fsync() vfs hook was deemed
|
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* redundant. The dentry is still accessible via filp->f_path.dentry,
|
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* and we are guaranteed that filp will never be NULL.
|
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*
|
||||
* 2.6.34 API change,
|
||||
* Prior to 2.6.34 the nfsd kernel server would pass a NULL file struct *
|
||||
* to the .fsync() hook. For this reason, we must be careful not to use
|
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* filp unconditionally in the 3 argument case.
|
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* Linux 2.6.x - 2.6.34 API,
|
||||
* Through 2.6.34 the nfsd kernel server would pass a NULL 'file struct *'
|
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* to the fops->fsync() hook. For this reason, we must be careful not to
|
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* use filp unconditionally.
|
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*/
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#ifdef HAVE_2ARGS_FSYNC
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static int
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zpl_fsync(struct file *filp, int datasync)
|
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{
|
||||
struct dentry *dentry = filp->f_path.dentry;
|
||||
#else
|
||||
static int
|
||||
zpl_fsync(struct file *filp, struct dentry *dentry, int datasync)
|
||||
{
|
||||
#endif /* HAVE_2ARGS_FSYNC */
|
||||
cred_t *cr = CRED();
|
||||
int error;
|
||||
|
||||
|
|
@ -108,6 +97,58 @@ zpl_fsync(struct file *filp, struct dentry *dentry, int datasync)
|
|||
return (error);
|
||||
}
|
||||
|
||||
#elif defined(HAVE_FSYNC_WITHOUT_DENTRY)
|
||||
/*
|
||||
* Linux 2.6.35 - 3.0 API,
|
||||
* As of 2.6.35 the dentry argument to the fops->fsync() hook was deemed
|
||||
* redundant. The dentry is still accessible via filp->f_path.dentry,
|
||||
* and we are guaranteed that filp will never be NULL.
|
||||
*/
|
||||
static int
|
||||
zpl_fsync(struct file *filp, int datasync)
|
||||
{
|
||||
struct inode *inode = filp->f_mapping->host;
|
||||
cred_t *cr = CRED();
|
||||
int error;
|
||||
|
||||
crhold(cr);
|
||||
error = -zfs_fsync(inode, datasync, cr);
|
||||
crfree(cr);
|
||||
ASSERT3S(error, <=, 0);
|
||||
|
||||
return (error);
|
||||
}
|
||||
|
||||
#elif defined(HAVE_FSYNC_RANGE)
|
||||
/*
|
||||
* Linux 3.1 - 3.x API,
|
||||
* As of 3.1 the responsibility to call filemap_write_and_wait_range() has
|
||||
* been pushed down in to the .fsync() vfs hook. Additionally, the i_mutex
|
||||
* lock is no longer held by the caller, for zfs we don't require the lock
|
||||
* to be held so we don't acquire it.
|
||||
*/
|
||||
static int
|
||||
zpl_fsync(struct file *filp, loff_t start, loff_t end, int datasync)
|
||||
{
|
||||
struct inode *inode = filp->f_mapping->host;
|
||||
cred_t *cr = CRED();
|
||||
int error;
|
||||
|
||||
error = filemap_write_and_wait_range(inode->i_mapping, start, end);
|
||||
if (error)
|
||||
return (error);
|
||||
|
||||
crhold(cr);
|
||||
error = -zfs_fsync(inode, datasync, cr);
|
||||
crfree(cr);
|
||||
ASSERT3S(error, <=, 0);
|
||||
|
||||
return (error);
|
||||
}
|
||||
#else
|
||||
#error "Unsupported fops->fsync() implementation"
|
||||
#endif
|
||||
|
||||
ssize_t
|
||||
zpl_read_common(struct inode *ip, const char *buf, size_t len, loff_t pos,
|
||||
uio_seg_t segment, int flags, cred_t *cr)
|
||||
|
|
|
|||
|
|
@ -6,9 +6,6 @@
|
|||
/* bio_end_io_t wants 2 args */
|
||||
#undef HAVE_2ARGS_BIO_END_IO_T
|
||||
|
||||
/* fops->fsync() want 2 args */
|
||||
#undef HAVE_2ARGS_FSYNC
|
||||
|
||||
/* security_inode_init_security wants 6 args */
|
||||
#undef HAVE_6ARGS_SECURITY_INODE_INIT_SECURITY
|
||||
|
||||
|
|
@ -93,6 +90,15 @@
|
|||
/* kernel defines fmode_t */
|
||||
#undef HAVE_FMODE_T
|
||||
|
||||
/* fops->fsync() with range */
|
||||
#undef HAVE_FSYNC_RANGE
|
||||
|
||||
/* fops->fsync() without dentry */
|
||||
#undef HAVE_FSYNC_WITHOUT_DENTRY
|
||||
|
||||
/* fops->fsync() with dentry */
|
||||
#undef HAVE_FSYNC_WITH_DENTRY
|
||||
|
||||
/* blk_disk_ro() is available */
|
||||
#undef HAVE_GET_DISK_RO
|
||||
|
||||
|
|
|
|||
Loading…
Reference in New Issue