diff options
Diffstat (limited to 'sys/kern/vfs_lookup.c')
| -rw-r--r-- | sys/kern/vfs_lookup.c | 182 |
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; -} |