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authorIan Moffett <ian@osmora.org>2024-06-24 22:55:29 -0400
committerIan Moffett <ian@osmora.org>2024-06-24 22:55:29 -0400
commit236963e7563be3e3f8220dac7bb4af446928e194 (patch)
treee521ea226db0345bbb3679fffe09d96254b7dc73 /sys/kern/vfs_lookup.c
parent214eadc62b5578f76c98a38a28f8b3d80ac4d6ad (diff)
Clean out for expt
Signed-off-by: Ian Moffett <ian@osmora.org>
Diffstat (limited to 'sys/kern/vfs_lookup.c')
-rw-r--r--sys/kern/vfs_lookup.c182
1 files changed, 0 insertions, 182 deletions
diff --git a/sys/kern/vfs_lookup.c b/sys/kern/vfs_lookup.c
deleted file mode 100644
index ea73d1a..0000000
--- a/sys/kern/vfs_lookup.c
+++ /dev/null
@@ -1,182 +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/vfs.h>
-#include <sys/mount.h>
-#include <sys/errno.h>
-#include <vm/dynalloc.h>
-#include <string.h>
-
-/*
- * Fetches the filename within a path at
- * the nth index denoted by `idx'
- *
- * Returns memory allocated by dynalloc()
- * containing the filename.
- *
- * XXX: MUST FREE RETURN VALUE WITH dynfree() WHEN
- * DONE!
- */
-char *
-vfs_get_fname_at(const char *path, size_t idx)
-{
- size_t pathlen = strlen(path);
- size_t fname_len;
-
- char *path_tmp = dynalloc(pathlen + 2);
- char *ret = NULL;
- char *start_ptr, *ptr;
-
- /* Make one-based */
- ++idx;
-
- if (path_tmp == NULL) {
- return NULL;
- }
-
- ptr = path_tmp;
- memcpy(path_tmp, path, pathlen + 1);
-
- /*
- * We want to by default have a '/' at the end
- * to keep the parsing logic from getting more
- * complicated than it needs to be.
- */
- path_tmp[pathlen] = '/';
- path_tmp[pathlen + 1] = '\0';
-
- /* Skip any leading slashes */
- while (*ptr == '/')
- ++ptr;
-
- start_ptr = ptr;
-
- /* Get each filename */
- while (*ptr != '\0') {
- /* Handle duplicate delimiter */
- if (*ptr == '/' && *(ptr + 1) == '/') {
- /*
- * Snip this delimiter and skip, the next
- * will be read and filename returned (if of course
- * the index is reached).
- */
- *(ptr++) = '\0';
- continue;
- }
-
- if (*ptr == '/') {
- *(ptr++) = '\0';
-
- /* Continue if index not reached */
- if ((--idx) != 0) {
- start_ptr = ptr;
- continue;
- }
-
- /* Index has been reached, start_ptr contains name */
- fname_len = strlen(start_ptr);
- ret = dynalloc(fname_len + 1);
-
- if (ret != NULL) {
- memcpy(ret, start_ptr, fname_len + 1);
- }
- break;
- }
-
- ++ptr;
- }
-
- dynfree(path_tmp);
- return ret;
-}
-
-/*
- * Fetches a vnode from a path.
- *
- * @path: Path to fetch vnode from.
- * @vp: Output var for fetched vnode.
- *
- * Returns 0 on success.
- */
-int
-vfs_path_to_node(const char *path, struct vnode **vp)
-{
- struct vnode *vnode = g_root_vnode;
- struct mount *mp;
- struct fs_info *fs;
- char *name;
- int s = 0, fs_caps = 0;
-
- if (strcmp(path, "/") == 0 || !vfs_is_valid_path(path)) {
- return -EINVAL;
- } else if (*path != '/') {
- return -EINVAL;
- }
-
- /* See if we have a mountpoint with this name */
- name = vfs_get_fname_at(path, 0);
- if (vfs_get_mp(name, &mp) == 0) {
- fs = mp->fs;
- vnode = fs->vnode;
- }
-
- /* Fetch filesystem capabilities if we can */
- if (vnode->fs != NULL) {
- fs = vnode->fs;
- fs_caps = fs->caps;
- }
-
- /*
- * If the filesystem requires full-path lookups, we can try
- * throwing the full path at the filesystem to see if
- * it'll give us a vnode.
- */
- if (__TEST(fs_caps, FSCAP_FULLPATH)) {
- s = vfs_vget(vnode, path, &vnode);
- goto done;
- }
-
- for (size_t i = 1;; ++i) {
- name = vfs_get_fname_at(path, i);
- if (name == NULL) break;
-
- s = vfs_vget(vnode, name, &vnode);
- dynfree(name);
-
- if (s != 0) break;
- }
-
-done:
- if (vp != NULL && s == 0) {
- *vp = vnode;
- }
-
- return s;
-}