diff options
Diffstat (limited to 'sys/vm/vm_vnode.c')
-rw-r--r-- | sys/vm/vm_vnode.c | 114 |
1 files changed, 0 insertions, 114 deletions
diff --git a/sys/vm/vm_vnode.c b/sys/vm/vm_vnode.c deleted file mode 100644 index e3d95ac..0000000 --- a/sys/vm/vm_vnode.c +++ /dev/null @@ -1,114 +0,0 @@ -/* - * Copyright (c) 2023-2024 Ian Marco Moffett and the Osmora Team. - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions are met: - * - * 1. Redistributions of source code must retain the above copyright notice, - * this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. Neither the name of Hyra nor the names of its - * contributors may be used to endorse or promote products derived from - * this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" - * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE - * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - */ - -#include <sys/types.h> -#include <sys/errno.h> -#include <sys/sio.h> -#include <sys/vfs.h> -#include <sys/cdefs.h> -#include <vm/obj.h> -#include <vm/vm.h> -#include <vm/pager.h> - -static int vn_pager_get(struct vm_object *obj, off_t off, size_t len, - struct vm_page *pg); - -static int vn_pager_store(struct vm_object *obj, off_t off, size_t len, - struct vm_page *pg); - -/* Pager operations */ -struct vm_pagerops g_vnode_pagerops = { - .get = vn_pager_get, - .store = vn_pager_store -}; - -static inline void -vn_prep_sio(struct sio_txn *sio, char *pg, off_t off, size_t len) -{ - sio->len = __ALIGN_DOWN(len, vm_get_page_size()); - sio->buf = pg; - sio->offset = off; - sio->len = len; -} - -static int -vn_pager_io(struct vm_object *obj, off_t off, size_t len, - struct vm_page *pg, bool out) -{ - struct sio_txn sio; - struct vnode *vp; - ssize_t paged_bytes; - char *dest; - int res = 0; - - if (obj == NULL || pg == NULL) { - return -EIO; - } - - spinlock_acquire(&obj->lock); - vm_object_ref(obj); - dest = PHYS_TO_VIRT(pg->physaddr); - - /* Attempt to fetch the vnode */ - if ((vp = obj->vnode) == NULL) { - res = -EIO; - goto done; - } - - /* Prepare the SIO transaction */ - vn_prep_sio(&sio, dest, off, len); - if (sio.len == 0) { - res = -EIO; - goto done; - } - - /* Perform I/O on the backing store */ - paged_bytes = out ? vfs_write(vp, &sio) : vfs_read(vp, &sio); - if (paged_bytes < 0) { - /* Failure */ - res = paged_bytes; - goto done; - } -done: - vm_object_unref(obj); - spinlock_release(&obj->lock); - return res; -} - -static int -vn_pager_store(struct vm_object *obj, off_t off, size_t len, struct vm_page *pg) -{ - return vn_pager_io(obj, off, len, pg, true); -} - -static int -vn_pager_get(struct vm_object *obj, off_t off, size_t len, struct vm_page *pg) -{ - return vn_pager_io(obj, off, len, pg, false); -} |