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/*
* This file and its contents are supplied under the terms of the
* Common Development and Distribution License ("CDDL"), version 1.0.
* You may only use this file in accordance with the terms of version
* 1.0 of the CDDL.
*
* A full copy of the text of the CDDL should have accompanied this
* source. A copy of the CDDL is also available via the Internet at
* http://www.illumos.org/license/CDDL.
*/
/*
* Copyright 2015 Joyent, Inc.
*/
#include <sys/systm.h>
#include <sys/types.h>
#include <sys/errno.h>
#include <sys/file.h>
#include <sys/vfs.h>
#include <sys/vnode.h>
#include <sys/lx_impl.h>
#include <sys/lx_brand.h>
long
lx_syncfs(int fd)
{
file_t *fp;
vfs_t *vfsp;
if ((fp = getf(fd)) == NULL)
return (set_errno(EBADF));
vfsp = fp->f_vnode->v_vfsp;
releasef(fd);
(void) (vfsp->vfs_op->vfs_sync)(vfsp, 0, CRED());
return (0);
}
#define LX_SYNC_FILE_RANGE_WAIT_BEFORE 0x1
#define LX_SYNC_FILE_RANGE_WRITE 0x2
#define LX_SYNC_FILE_RANGE_WAIT_AFTER 0x4
#define LX_SYNC_FILE_RANGE_VALID (LX_SYNC_FILE_RANGE_WAIT_BEFORE | \
LX_SYNC_FILE_RANGE_WRITE | LX_SYNC_FILE_RANGE_WAIT_AFTER)
long
lx_sync_file_range(int fd, off_t offset, off_t nbytes, int flags)
{
file_t *fp;
int error, sflags = 0;
if ((flags & ~LX_SYNC_FILE_RANGE_VALID) != 0)
return (set_errno(EINVAL));
if (offset < 0 || nbytes < 0)
return (set_errno(EINVAL));
if ((fp = getf(fd)) == NULL)
return (set_errno(EBADF));
/*
* Since sync_file_range is implemented in terms of VOP_PUTPAGE, both
* SYNC_FILE_RANGE_WAIT flags are treated as forcing synchronous
* operation. While this differs from the Linux behavior where
* BEFORE/AFTER are distinct, it achieves an adequate level of safety
* since the requested data is synced out at the end of the call.
*/
if ((flags & (LX_SYNC_FILE_RANGE_WAIT_BEFORE |
LX_SYNC_FILE_RANGE_WAIT_AFTER)) == 0) {
sflags |= B_ASYNC;
}
error = VOP_PUTPAGE(fp->f_vnode, offset, nbytes, sflags, CRED(), NULL);
if (error == ENOSYS) {
error = ESPIPE;
}
releasef(fd);
if (error != 0) {
return (set_errno(error));
}
return (0);
}
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