summaryrefslogtreecommitdiff
path: root/serverboot/file_io.c
diff options
context:
space:
mode:
Diffstat (limited to 'serverboot/file_io.c')
-rw-r--r--serverboot/file_io.c317
1 files changed, 0 insertions, 317 deletions
diff --git a/serverboot/file_io.c b/serverboot/file_io.c
deleted file mode 100644
index 99966f95..00000000
--- a/serverboot/file_io.c
+++ /dev/null
@@ -1,317 +0,0 @@
-/*
- * Copyright (c) 1994 The University of Utah and
- * the Computer Systems Laboratory at the University of Utah (CSL).
- * All rights reserved.
- *
- * Permission to use, copy, modify and distribute this software is hereby
- * granted provided that (1) source code retains these copyright, permission,
- * and disclaimer notices, and (2) redistributions including binaries
- * reproduce the notices in supporting documentation, and (3) all advertising
- * materials mentioning features or use of this software display the following
- * acknowledgement: ``This product includes software developed by the
- * Computer Systems Laboratory at the University of Utah.''
- *
- * THE UNIVERSITY OF UTAH AND CSL ALLOW FREE USE OF THIS SOFTWARE IN ITS "AS
- * IS" CONDITION. THE UNIVERSITY OF UTAH AND CSL DISCLAIM ANY LIABILITY OF
- * ANY KIND FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
- *
- * CSL requests users of this software to return to csl-dist@cs.utah.edu any
- * improvements that they make and grant CSL redistribution rights.
- *
- * Author: Bryan Ford, University of Utah CSL
- * MINIX FS patches: Csizmazia Balazs, University ELTE, Hungary
- */
-/* This is just an icky kludgy "VFS layer" (harhar) for ffs and ext2 and minix. */
-
-#include "file_io.h"
-
-int
-open_file(master_device_port, path, fp)
- mach_port_t master_device_port;
- char * path;
- struct file *fp;
-{
- int rc;
-
- if ((rc = ext2_open_file(master_device_port, path, fp))
- != FS_INVALID_FS)
- {
- if (rc == 0)
- fp->f_fstype = EXT2_FS;
- return rc;
- }
- if ( (rc = minix_open_file(master_device_port, path, fp))
- != FS_INVALID_FS )
- {
- if (rc == 0)
- fp->f_fstype = MINIX_FS;
- return rc;
- }
- fp->f_fstype = BSD_FFS;
- return ffs_open_file(master_device_port, path, fp);
-}
-
-void
-close_file(fp)
- register struct file *fp;
-{
- switch (fp->f_fstype) {
- case EXT2_FS:
- ext2_close_file(fp);
- return;
- case MINIX_FS:
- minix_close_file(fp);
- return;
- default:
- ffs_close_file(fp);
- return;
- }
-}
-
-int
-read_file(fp, offset, start, size, resid)
- register struct file *fp;
- vm_offset_t offset;
- vm_offset_t start;
- vm_size_t size;
- vm_size_t *resid; /* out */
-{
- switch (fp->f_fstype) {
- case EXT2_FS:
- return ext2_read_file(fp, offset, start, size, resid);
- case MINIX_FS:
- return minix_read_file(fp, offset, start, size, resid);
- default:
- return ffs_read_file(fp, offset, start, size, resid);
- }
-
-}
-
-int
-file_is_directory(struct file *f)
-{
- switch (f->f_fstype) {
- case EXT2_FS:
- return ext2_file_is_directory(f);
- case MINIX_FS:
- return minix_file_is_directory(f);
- default:
- return ffs_file_is_directory(f);
- }
-}
-
-int
-file_is_regular(struct file *f)
-{
- switch (f->f_fstype) {
- case EXT2_FS:
- return ext2_file_is_regular(f);
- case MINIX_FS:
- return minix_file_is_regular(f);
- default:
- return ffs_file_is_regular(f);
- }
-
-}
-
-int
-open_file_direct(dev, fdp, is_structured)
- mach_port_t dev;
- register struct file_direct *fdp;
- boolean_t is_structured;
-{
- int rc;
-
-
- if ((rc = ext2_open_file_direct(dev, fdp, is_structured))
- != FS_INVALID_FS)
- {
- if (rc == 0)
- fdp->f_fstype = EXT2_FS;
- return rc;
- }
- if ( (rc = minix_open_file_direct(dev, fdp, is_structured) )
- != FS_INVALID_FS )
- {
- if (rc == 0)
- fdp->f_fstype = MINIX_FS;
- return rc;
- }
- fdp->f_fstype = BSD_FFS;
- return ffs_open_file_direct(dev, fdp, is_structured);
-}
-
-int
-add_file_direct(fdp, fp)
- register struct file_direct *fdp;
- register struct file *fp;
-{
- switch (fp->f_fstype) {
- case EXT2_FS:
- return ext2_add_file_direct(fdp, fp);
- case MINIX_FS:
- return minix_add_file_direct(fdp, fp);
- default:
- return ffs_add_file_direct(fdp, fp);
- }
-}
-
-
-int
-remove_file_direct(fdp)
- struct file_direct *fdp;
-{
- switch (fdp->f_fstype) {
- case EXT2_FS:
- return ext2_remove_file_direct(fdp);
- case MINIX_FS:
- return minix_remove_file_direct(fdp);
- default:
- return ffs_remove_file_direct(fdp);
- }
-}
-
-/*
- * some other stuff, that was previously defined as macro
- */
-
-int
-file_is_structured(fp)
- register struct file *fp;
-{
- switch (fp->f_fstype) {
- case EXT2_FS:
- return (fp)->u.ext2.ext2_fs != 0;
- case MINIX_FS:
- return (fp)->u.minix.minix_fs != 0;
- default:
- return (fp)->u.ffs.ffs_fs != 0;
- }
-}
-
-/*
- * Special read and write routines for default pager.
- * Assume that all offsets and sizes are multiples
- * of DEV_BSIZE.
- */
-
-#define fdir_blkoff(fdp, offset) /* offset % fd_bsize */ \
- ((offset) & ((fdp)->fd_bsize - 1))
-#define fdir_lblkno(fdp, offset) /* offset / fd_bsize */ \
- ((offset) >> (fdp)->fd_bshift)
-
-#define fdir_fsbtodb(fdp, block) /* offset * fd_bsize / DEV_BSIZE */ \
- ((block) << (fdp)->fd_fsbtodb)
-
-/*
- * Read all or part of a data block, and
- * return a pointer to the appropriate part.
- * Caller must deallocate the block when done.
- */
-int
-page_read_file_direct(fdp, offset, size, addr, size_read)
- register struct file_direct *fdp;
- vm_offset_t offset;
- vm_size_t size;
- vm_offset_t *addr; /* out */
- mach_msg_type_number_t *size_read; /* out */
-{
- vm_offset_t off;
- register daddr_t file_block;
- daddr_t disk_block;
-
- if (offset % DEV_BSIZE != 0 ||
- size % DEV_BSIZE != 0)
- panic("page_read_file_direct");
-
- if (offset >= (fdp->fd_size << fdp->fd_bshift))
- return (FS_NOT_IN_FILE);
-
- off = fdir_blkoff(fdp, offset);
- file_block = fdir_lblkno(fdp, offset);
-
- if (file_is_device(fdp)) {
- disk_block = file_block;
- } else {
- disk_block = fdp->fd_blocks[file_block];
- if (disk_block == 0)
- return (FS_NOT_IN_FILE);
-
- if (size > fdp->fd_bsize) {
- /* Read only as much as is contiguous on disk. */
- daddr_t b = file_block + 1;
- while (b < file_block + fdp->fd_size &&
- fdp->fd_blocks[b] == disk_block + fdir_fsbtodb(fdp, 1))
- ++b;
- size = (b - file_block) * fdp->fd_bsize;
- }
- }
-
- return (device_read(fdp->fd_dev,
- 0,
- (recnum_t) (fdir_fsbtodb(fdp, disk_block) + btodb(off)),
- (int) size,
- (char **) addr,
- size_read));
-}
-
-/*
- * Write all or part of a data block, and
- * return the amount written.
- */
-int
-page_write_file_direct(fdp, offset, addr, size, size_written)
- register struct file_direct *fdp;
- vm_offset_t offset;
- vm_offset_t addr;
- vm_size_t size;
- vm_offset_t *size_written; /* out */
-{
- vm_offset_t off;
- register daddr_t file_block;
- daddr_t disk_block;
- int rc, num_written;
- vm_offset_t block_size;
-
- if (offset % DEV_BSIZE != 0 ||
- size % DEV_BSIZE != 0)
- panic("page_write_file");
-
- if (offset >= (fdp->fd_size << fdp->fd_bshift))
- return (FS_NOT_IN_FILE);
-
- off = fdir_blkoff(fdp, offset);
- file_block = fdir_lblkno(fdp, offset);
-
- if (file_is_device(fdp)) {
- disk_block = file_block;
- } else {
- disk_block = fdp->fd_blocks[file_block];
- if (disk_block == 0)
- return (FS_NOT_IN_FILE);
-
- if (size > fdp->fd_bsize) {
- /* Write only as much as is contiguous on disk. */
- daddr_t b = file_block + 1;
- while (b < file_block + fdp->fd_size &&
- fdp->fd_blocks[b] == disk_block + fdir_fsbtodb(fdp, 1))
- ++b;
- size = (b - file_block) * fdp->fd_bsize;
- }
- }
-
- /*
- * Write the data. Wait for completion to keep
- * reads from getting ahead of writes and reading
- * stale data.
- */
- rc = device_write(
- fdp->fd_dev,
- 0,
- (recnum_t) (fdir_fsbtodb(fdp, disk_block) + btodb(off)),
- (char *) addr,
- size,
- &num_written);
- *size_written = num_written;
- return rc;
-}
generated by cgit v1.2.3 (git 2.39.1) at 2024-06-29 23:38:35 +0000