aboutsummaryrefslogtreecommitdiff
path: root/sys/cddl/compat/opensolaris/kern/opensolaris_kobj.c
diff options
context:
space:
mode:
Diffstat (limited to 'sys/cddl/compat/opensolaris/kern/opensolaris_kobj.c')
-rw-r--r--sys/cddl/compat/opensolaris/kern/opensolaris_kobj.c210
1 files changed, 210 insertions, 0 deletions
diff --git a/sys/cddl/compat/opensolaris/kern/opensolaris_kobj.c b/sys/cddl/compat/opensolaris/kern/opensolaris_kobj.c
new file mode 100644
index 000000000000..14d48da82ac0
--- /dev/null
+++ b/sys/cddl/compat/opensolaris/kern/opensolaris_kobj.c
@@ -0,0 +1,210 @@
+/*-
+ * Copyright (c) 2007 Pawel Jakub Dawidek <pjd@FreeBSD.org>
+ * 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.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHORS 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 AUTHORS 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/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/types.h>
+#include <sys/systm.h>
+#include <sys/kernel.h>
+#include <sys/systm.h>
+#include <sys/kthread.h>
+#include <sys/namei.h>
+#include <sys/proc.h>
+#include <sys/filedesc.h>
+#include <sys/fcntl.h>
+#include <sys/linker.h>
+#include <sys/kobj.h>
+
+void
+kobj_free(void *address, size_t size)
+{
+
+ kmem_free(address, size);
+}
+
+void *
+kobj_alloc(size_t size, int flag)
+{
+
+ return (kmem_alloc(size, (flag & KM_NOWAIT) ? KM_NOSLEEP : KM_SLEEP));
+}
+
+void *
+kobj_zalloc(size_t size, int flag)
+{
+ void *p;
+
+ if ((p = kobj_alloc(size, flag)) != NULL)
+ bzero(p, size);
+ return (p);
+}
+
+static void *
+kobj_open_file_vnode(const char *file)
+{
+ struct thread *td = curthread;
+ struct nameidata nd;
+ int error, flags;
+
+ pwd_ensure_dirs();
+
+ flags = FREAD | O_NOFOLLOW;
+ NDINIT(&nd, LOOKUP, 0, UIO_SYSSPACE, file, td);
+ error = vn_open_cred(&nd, &flags, 0, 0, curthread->td_ucred, NULL);
+ if (error != 0)
+ return (NULL);
+ NDFREE(&nd, NDF_ONLY_PNBUF);
+ /* We just unlock so we hold a reference. */
+ VOP_UNLOCK(nd.ni_vp);
+ return (nd.ni_vp);
+}
+
+static void *
+kobj_open_file_loader(const char *file)
+{
+
+ return (preload_search_by_name(file));
+}
+
+struct _buf *
+kobj_open_file(const char *file)
+{
+ struct _buf *out;
+
+ out = kmem_alloc(sizeof(*out), KM_SLEEP);
+ out->mounted = root_mounted();
+ /*
+ * If root is already mounted we read file using file system,
+ * if not, we use loader.
+ */
+ if (out->mounted)
+ out->ptr = kobj_open_file_vnode(file);
+ else
+ out->ptr = kobj_open_file_loader(file);
+ if (out->ptr == NULL) {
+ kmem_free(out, sizeof(*out));
+ return ((struct _buf *)-1);
+ }
+ return (out);
+}
+
+static int
+kobj_get_filesize_vnode(struct _buf *file, uint64_t *size)
+{
+ struct vnode *vp = file->ptr;
+ struct vattr va;
+ int error;
+
+ vn_lock(vp, LK_SHARED | LK_RETRY);
+ error = VOP_GETATTR(vp, &va, curthread->td_ucred);
+ VOP_UNLOCK(vp);
+ if (error == 0)
+ *size = (uint64_t)va.va_size;
+ return (error);
+}
+
+static int
+kobj_get_filesize_loader(struct _buf *file, uint64_t *size)
+{
+ void *ptr;
+
+ ptr = preload_search_info(file->ptr, MODINFO_SIZE);
+ if (ptr == NULL)
+ return (ENOENT);
+ *size = (uint64_t)*(size_t *)ptr;
+ return (0);
+}
+
+int
+kobj_get_filesize(struct _buf *file, uint64_t *size)
+{
+
+ if (file->mounted)
+ return (kobj_get_filesize_vnode(file, size));
+ else
+ return (kobj_get_filesize_loader(file, size));
+}
+
+int
+kobj_read_file_vnode(struct _buf *file, char *buf, unsigned size, unsigned off)
+{
+ struct vnode *vp = file->ptr;
+ struct thread *td = curthread;
+ struct uio auio;
+ struct iovec aiov;
+ int error;
+
+ bzero(&aiov, sizeof(aiov));
+ bzero(&auio, sizeof(auio));
+
+ aiov.iov_base = buf;
+ aiov.iov_len = size;
+
+ auio.uio_iov = &aiov;
+ auio.uio_offset = (off_t)off;
+ auio.uio_segflg = UIO_SYSSPACE;
+ auio.uio_rw = UIO_READ;
+ auio.uio_iovcnt = 1;
+ auio.uio_resid = size;
+ auio.uio_td = td;
+
+ vn_lock(vp, LK_SHARED | LK_RETRY);
+ error = VOP_READ(vp, &auio, IO_UNIT | IO_SYNC, td->td_ucred);
+ VOP_UNLOCK(vp);
+ return (error != 0 ? -1 : size - auio.uio_resid);
+}
+
+int
+kobj_read_file_loader(struct _buf *file, char *buf, unsigned size, unsigned off)
+{
+ char *ptr;
+
+ ptr = preload_fetch_addr(file->ptr);
+ if (ptr == NULL)
+ return (ENOENT);
+ bcopy(ptr + off, buf, size);
+ return (0);
+}
+
+int
+kobj_read_file(struct _buf *file, char *buf, unsigned size, unsigned off)
+{
+
+ if (file->mounted)
+ return (kobj_read_file_vnode(file, buf, size, off));
+ else
+ return (kobj_read_file_loader(file, buf, size, off));
+}
+
+void
+kobj_close_file(struct _buf *file)
+{
+
+ if (file->mounted)
+ vn_close(file->ptr, FREAD, curthread->td_ucred, curthread);
+ kmem_free(file, sizeof(*file));
+}