diff options
| -rw-r--r-- | src/sys/include/sys/namei.h | 52 | ||||
| -rw-r--r-- | src/sys/os/vfs_namei.c | 91 |
2 files changed, 143 insertions, 0 deletions
diff --git a/src/sys/include/sys/namei.h b/src/sys/include/sys/namei.h new file mode 100644 index 0000000..588dbd3 --- /dev/null +++ b/src/sys/include/sys/namei.h @@ -0,0 +1,52 @@ +/* + * Copyright (c) 2025 Ian Marco Moffett and L5 engineers + * 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 the project 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. + */ + +#ifndef _SYS_NAMEI_H_ +#define _SYS_NAMEI_H_ 1 + +#include <os/vnode.h> + +/* + * Represents namei data that can be used for + * looking up files + * + * @path: Full path to lookup + * @flags: Flags to use + * @vp: Vnode result is written here + */ +struct nameidata { + const char *path; + uint32_t flags; + struct vnode *vp; +}; + +#if defined(_KERNEL) +int namei(struct nameidata *ndp); +#endif /* _KERNEL */ +#endif /* !_SYS_NAMEI_H_ */ diff --git a/src/sys/os/vfs_namei.c b/src/sys/os/vfs_namei.c new file mode 100644 index 0000000..8727965 --- /dev/null +++ b/src/sys/os/vfs_namei.c @@ -0,0 +1,91 @@ +/* + * Copyright (c) 2025 Ian Marco Moffett and L5 engineers + * 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 the project 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. + */ + +/* + * Description: File lookup algorithm + * Author: Ian Marco Moffett + */ + +#include <sys/errno.h> +#include <sys/syslog.h> +#include <sys/mount.h> +#include <sys/limits.h> +#include <sys/namei.h> +#include <string.h> + +int +namei(struct nameidata *ndp) +{ + struct mount *mp = NULL; + char namebuf[NAME_MAX]; + const char *p, *pcur; + size_t len, i = 0; + int error; + + if (ndp == NULL) { + return -EINVAL; + } + + if ((p = ndp->path) == NULL) { + printf("namei: path is NULL\n"); + return -EINVAL; + } + + error = mount_lookup("/", &mp); + if (error < 0) { + printf("namei: failed to get rootfs\n"); + return error; + } + + printf("namei: f: %s\n", ndp->path); + printf("namei: d: /\n", ndp->path); + + pcur = p; + while (*pcur != '\0') { + /* Get out of the slashes */ + while (*pcur == '/') + ++pcur; + + p = pcur; + + /* Go back to the start */ + memset(namebuf, 0, sizeof(namebuf)); + while (*pcur != '/' && *pcur != '\0') { + namebuf[i++] = *pcur++; + + if (i > sizeof(namebuf) - 1) { + return -ENAMETOOLONG; + } + } + + i = 0; + printf("namei: n %s\n", namebuf); + } + return 0; +} |