diff options
| -rw-r--r-- | sys/inc/kern/namei.h | 50 | ||||
| -rw-r--r-- | sys/kern/kern_namei.c | 100 |
2 files changed, 150 insertions, 0 deletions
diff --git a/sys/inc/kern/namei.h b/sys/inc/kern/namei.h new file mode 100644 index 0000000..6bdc859 --- /dev/null +++ b/sys/inc/kern/namei.h @@ -0,0 +1,50 @@ +/* + * Copyright (c) 2025 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. + */ + +#ifndef _KERN_NAMEI_H_ +#define _KERN_NAMEI_H_ 1 + +#include <sys/types.h> +#include <sys/param.h> + +/* + * Represents arguments to be passed with namei() + */ +struct nameidata { + const char *pathname; + struct vnode *vp_res; + int flags; +}; + +/* + * Resolve a path into a vnode + */ +int namei(struct nameidata *ndp); + +#endif /* !_KERN_NAMEI_H_ */ diff --git a/sys/kern/kern_namei.c b/sys/kern/kern_namei.c new file mode 100644 index 0000000..ab96f75 --- /dev/null +++ b/sys/kern/kern_namei.c @@ -0,0 +1,100 @@ +/* + * Copyright (c) 2025 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/errno.h> +#include <sys/limits.h> +#include <os/mount.h> +#include <kern/namei.h> + +#include <os/trace.h> + +int +namei(struct nameidata *ndp) +{ + struct mount *mpoint = NULL; + struct vnode *vp = NULL; + const char *p; + int error; + char namebuf[NAME_MAX]; + size_t namebuf_idx = 0; + + if (ndp == NULL) { + return -EINVAL; + } + + if (ndp->pathname == NULL || ndp->vp_res == NULL) { + return -EINVAL; + } + + trace("f: %s\n", ndp->pathname); + + /* Iterate through the path */ + p = ndp->pathname; + while (*p != '\0') { + /* Skip leading slashes */ + while (*p != '\0' && *p == '/') { + *p++; + } + + if (*p == '\0') { + break; + } + + /* Fill the name buffer */ + while (*p != '\0' && *p != '/') { + namebuf[namebuf_idx++] = *p++; + if (namebuf_idx >= sizeof(namebuf) - 1) { + break; + } + namebuf[namebuf_idx] = '\0'; + } + + /* + * If we have't yet looked up a mountpoint, do that and + * see if it was found. + */ + if (mpoint == NULL) { + error = mount_lookup(namebuf, &mpoint); + + if (error != 0) + return error; + if ((vp = mpoint->vp) == NULL) + return -EIO; + + namebuf_idx = 0; + continue; + } + + trace("d: %s\n", namebuf); + namebuf_idx = 0; + } + + ndp->vp_res = vp; + return 0; +} |