sdcard.c revision 03ee9479a4ed67689b9bbccda20c60800a38b178
103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland/* 203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * Copyright (C) 2010 The Android Open Source Project 303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * 403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * Licensed under the Apache License, Version 2.0 (the "License"); 503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * you may not use this file except in compliance with the License. 603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * You may obtain a copy of the License at 703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * 803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * http://www.apache.org/licenses/LICENSE-2.0 903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * 1003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * Unless required by applicable law or agreed to in writing, software 1103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * distributed under the License is distributed on an "AS IS" BASIS, 1203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * See the License for the specific language governing permissions and 1403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * limitations under the License. 1503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland */ 1603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 1703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland#include <stdio.h> 1803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland#include <stdlib.h> 1903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland#include <string.h> 2003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland#include <unistd.h> 2103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland#include <errno.h> 2203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland#include <fcntl.h> 2303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland#include <sys/mount.h> 2403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland#include <sys/stat.h> 2503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland#include <sys/uio.h> 2603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland#include <dirent.h> 2703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 2803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland#include "fuse.h" 2903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 3003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland/* README 3103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * 3203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * What is this? 3303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * 3403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * sdcard is a program that uses FUSE to emulate FAT-on-sdcard style 3503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * directory permissions (all files are given fixed owner, group, and 3603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * permissions at creation, owner, group, and permissions are not 3703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * changeable, symlinks and hardlinks are not createable, etc. 3803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * 3903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * usage: sdcard <path> <uid> <gid> 4003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * 4103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * It must be run as root, but will change to uid/gid as soon as it 4203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * mounts a filesystem on /sdcard. It will refuse to run if uid or 4303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * gid are zero. 4403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * 4503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * 4603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * Things I believe to be true: 4703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * 4803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * - ops that return a fuse_entry (LOOKUP, MKNOD, MKDIR, LINK, SYMLINK, 4903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * CREAT) must bump that node's refcount 5003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * - don't forget that FORGET can forget multiple references (req->nlookup) 5103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * - if an op that returns a fuse_entry fails writing the reply to the 5203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * kernel, you must rollback the refcount to reflect the reference the 5303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * kernel did not actually acquire 5403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * 5503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * 5603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * Bugs: 5703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * 5803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * - need to move/rename node on RENAME 5903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland */ 6003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 6103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland#define FUSE_TRACE 0 6203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 6303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland#if FUSE_TRACE 6403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland#define TRACE(x...) fprintf(stderr,x) 6503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland#else 6603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland#define TRACE(x...) do {} while (0) 6703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland#endif 6803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 6903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland#define ERROR(x...) fprintf(stderr,x) 7003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 7103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland#define FUSE_UNKNOWN_INO 0xffffffff 7203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 7303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandstruct handle { 7403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct node *node; 7503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int fd; 7603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland}; 7703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 7803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandstruct dirhandle { 7903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct node *node; 8003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland DIR *d; 8103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland}; 8203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 8303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandstruct node { 8403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland __u64 nid; 8503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland __u64 gen; 8603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 8703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct node *next; 8803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct node *child; 8903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct node *all; 9003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct node *parent; 9103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 9203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland __u32 refcount; 9303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland __u32 namelen; 9403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 9503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char name[1]; 9603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland}; 9703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 9803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandstruct fuse { 9903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland __u64 next_generation; 10003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland __u64 next_node_id; 10103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 10203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int fd; 10303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 10403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct node *all; 10503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 10603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct node root; 10703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char rootpath[1024]; 10803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland}; 10903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 11003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland#define PATH_BUFFER_SIZE 1024 11103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 11203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandchar *node_get_path(struct node *node, char *buf, const char *name) 11303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 11403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *out = buf + PATH_BUFFER_SIZE - 1; 11503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int len; 11603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out[0] = 0; 11703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 11803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (name) { 11903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland len = strlen(name); 12003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland goto start; 12103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 12203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 12303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland while (node) { 12403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland name = node->name; 12503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland len = node->namelen; 12603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node = node->parent; 12703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland start: 12803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if ((len + 1) > (out - buf)) 12903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return 0; 13003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out -= len; 13103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland memcpy(out, name, len); 13203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out --; 13303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out[0] = '/'; 13403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 13503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 13603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return out; 13703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 13803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 13903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandvoid attr_from_stat(struct fuse_attr *attr, struct stat *s) 14003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 14103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland attr->ino = s->st_ino; 14203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland attr->size = s->st_size; 14303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland attr->blocks = s->st_blocks; 14403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland /* TODO: time */ 14503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland attr->mode = s->st_mode; 14603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland attr->nlink = s->st_nlink; 14703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland /* TODO: uid/gid */ 14803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 14903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland attr->uid = 1000; 15003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland attr->gid = 1000; 15103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 15203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 15303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandint node_get_attr(struct node *node, struct fuse_attr *attr) 15403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 15503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int res; 15603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct stat s; 15703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *path, buffer[PATH_BUFFER_SIZE]; 15803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 15903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland path = node_get_path(node, buffer, 0); 16003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland res = lstat(path, &s); 16103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (res < 0) { 16203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland ERROR("lstat('%s') errno %d\n", path, errno); 16303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return -1; 16403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 16503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 16603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland attr_from_stat(attr, &s); 16703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland attr->ino = node->nid; 16803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 16903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return 0; 17003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 17103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 17203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandstruct node *node_create(struct node *parent, const char *name, __u64 nid, __u64 gen) 17303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 17403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct node *node; 17503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int namelen = strlen(name); 17603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 17703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node = calloc(1, sizeof(struct node) + namelen); 17803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (node == 0) { 17903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return 0; 18003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 18103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 18203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node->nid = nid; 18303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node->gen = gen; 18403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node->parent = parent; 18503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node->next = parent->child; 18603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland parent->child = node; 18703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland memcpy(node->name, name, namelen + 1); 18803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node->namelen = namelen; 18903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland parent->refcount++; 19003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 19103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return node; 19203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 19303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 19403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandvoid fuse_init(struct fuse *fuse, int fd, const char *path) 19503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 19603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse->fd = fd; 19703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse->next_node_id = 2; 19803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse->next_generation = 0; 19903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 20003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse->all = &fuse->root; 20103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 20203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse->root.nid = FUSE_ROOT_ID; /* 1 */ 20303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse->root.next = 0; 20403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse->root.child = 0; 20503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse->root.parent = 0; 20603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 20703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse->root.all = 0; 20803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse->root.refcount = 2; 20903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 21003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland strcpy(fuse->root.name, path); 21103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse->root.namelen = strlen(fuse->root.name); 21203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 21303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 21403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandstatic inline void *id_to_ptr(__u64 nid) 21503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 21603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return (void *) nid; 21703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 21803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 21903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandstatic inline __u64 ptr_to_id(void *ptr) 22003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 22103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return (__u64) ptr; 22203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 22303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 22403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 22503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandstruct node *lookup_by_inode(struct fuse *fuse, __u64 nid) 22603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 22703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (nid == FUSE_ROOT_ID) { 22803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return &fuse->root; 22903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } else { 23003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return id_to_ptr(nid); 23103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 23203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 23303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 23403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandstruct node *lookup_child_by_name(struct node *node, const char *name) 23503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 23603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland for (node = node->child; node; node = node->next) { 23703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (!strcmp(name, node->name)) { 23803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return node; 23903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 24003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 24103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return 0; 24203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 24303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 24403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandstruct node *lookup_child_by_inode(struct node *node, __u64 nid) 24503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 24603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland for (node = node->child; node; node = node->next) { 24703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (node->nid == nid) { 24803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return node; 24903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 25003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 25103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return 0; 25203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 25303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 25403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandstruct node *node_lookup(struct fuse *fuse, struct node *parent, const char *name, 25503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_attr *attr) 25603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 25703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int res; 25803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct stat s; 25903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *path, buffer[PATH_BUFFER_SIZE]; 26003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct node *node; 26103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 26203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland path = node_get_path(parent, buffer, name); 26303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland /* XXX error? */ 26403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 26503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland res = lstat(path, &s); 26603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (res < 0) 26703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return 0; 26803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 26903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node = lookup_child_by_name(parent, name); 27003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (!node) { 27103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node = node_create(parent, name, fuse->next_node_id++, fuse->next_generation++); 27203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (!node) 27303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return 0; 27403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node->nid = ptr_to_id(node); 27503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node->all = fuse->all; 27603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse->all = node; 27703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 27803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 27903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland attr_from_stat(attr, &s); 28003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland attr->ino = node->nid; 28103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 28203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return node; 28303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 28403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 28503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandvoid node_release(struct node *node) 28603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 28703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("RELEASE %p (%s) rc=%d\n", node, node->name, node->refcount); 28803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node->refcount--; 28903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (node->refcount == 0) { 29003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (node->parent->child == node) { 29103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node->parent->child = node->parent->child->next; 29203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } else { 29303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct node *node2; 29403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 29503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node2 = node->parent->child; 29603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland while (node2->next != node) 29703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node2 = node2->next; 29803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node2->next = node->next; 29903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 30003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 30103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("DESTROY %p (%s)\n", node, node->name); 30203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 30303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node_release(node->parent); 30403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 30503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node->parent = 0; 30603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node->next = 0; 30703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 30803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland /* TODO: remove debugging - poison memory */ 30903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland memset(node, 0xef, sizeof(*node) + strlen(node->name)); 31003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 31103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland free(node); 31203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 31303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 31403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 31503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandvoid fuse_status(struct fuse *fuse, __u64 unique, int err) 31603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 31703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_out_header hdr; 31803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland hdr.len = sizeof(hdr); 31903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland hdr.error = err; 32003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland hdr.unique = unique; 32103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (err) { 32203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland// ERROR("*** %d ***\n", err); 32303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 32403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland write(fuse->fd, &hdr, sizeof(hdr)); 32503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 32603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 32703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandvoid fuse_reply(struct fuse *fuse, __u64 unique, void *data, int len) 32803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 32903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_out_header hdr; 33003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct iovec vec[2]; 33103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int res; 33203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 33303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland hdr.len = len + sizeof(hdr); 33403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland hdr.error = 0; 33503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland hdr.unique = unique; 33603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 33703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland vec[0].iov_base = &hdr; 33803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland vec[0].iov_len = sizeof(hdr); 33903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland vec[1].iov_base = data; 34003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland vec[1].iov_len = len; 34103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 34203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland res = writev(fuse->fd, vec, 2); 34303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (res < 0) { 34403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland ERROR("*** REPLY FAILED *** %d\n", errno); 34503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 34603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 34703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 34803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandvoid lookup_entry(struct fuse *fuse, struct node *node, 34903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland const char *name, __u64 unique) 35003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 35103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_entry_out out; 35203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 35303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland memset(&out, 0, sizeof(out)); 35403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 35503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node = node_lookup(fuse, node, name, &out.attr); 35603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (!node) { 35703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, unique, -ENOENT); 35803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 35903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 36003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 36103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node->refcount++; 36203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland// fprintf(stderr,"ACQUIRE %p (%s) rc=%d\n", node, node->name, node->refcount); 36303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.nodeid = node->nid; 36403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.generation = node->gen; 36503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.entry_valid = 10; 36603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.attr_valid = 10; 36703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 36803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_reply(fuse, unique, &out, sizeof(out)); 36903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 37003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 37103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandvoid handle_fuse_request(struct fuse *fuse, struct fuse_in_header *hdr, void *data, unsigned len) 37203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 37303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct node *node; 37403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 37503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if ((len < sizeof(*hdr)) || (hdr->len != len)) { 37603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland ERROR("malformed header\n"); 37703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 37803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 37903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 38003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland len -= hdr->len; 38103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 38203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (hdr->nodeid) { 38303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node = lookup_by_inode(fuse, hdr->nodeid); 38403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (!node) { 38503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, -ENOENT); 38603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 38703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 38803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } else { 38903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node = 0; 39003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 39103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 39203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland switch (hdr->opcode) { 39303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_LOOKUP: { /* bytez[] -> entry_out */ 39403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("LOOKUP %llx %s\n", hdr->nodeid, (char*) data); 39503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland lookup_entry(fuse, node, (char*) data, hdr->unique); 39603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 39703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 39803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_FORGET: { 39903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_forget_in *req = data; 40003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("FORGET %llx (%s) #%lld\n", hdr->nodeid, node->name, req->nlookup); 40103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland /* no reply */ 40203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland while (req->nlookup--) 40303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node_release(node); 40403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 40503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 40603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_GETATTR: { /* getattr_in -> attr_out */ 40703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_getattr_in *req = data; 40803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_attr_out out; 40903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 41003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("GETATTR flags=%x fh=%llx\n",req->getattr_flags, req->fh); 41103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 41203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland memset(&out, 0, sizeof(out)); 41303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node_get_attr(node, &out.attr); 41403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.attr_valid = 10; 41503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 41603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_reply(fuse, hdr->unique, &out, sizeof(out)); 41703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 41803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 41903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_SETATTR: { /* setattr_in -> attr_out */ 42003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_setattr_in *req = data; 42103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_attr_out out; 42203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("SETATTR fh=%llx id=%llx valid=%x\n", 42303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland req->fh, hdr->nodeid, req->valid); 42403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 42503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland /* XXX */ 42603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 42703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland memset(&out, 0, sizeof(out)); 42803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node_get_attr(node, &out.attr); 42903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.attr_valid = 10; 43003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_reply(fuse, hdr->unique, &out, sizeof(out)); 43103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 43203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 43303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland// case FUSE_READLINK: 43403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland// case FUSE_SYMLINK: 43503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_MKNOD: { /* mknod_in, bytez[] -> entry_out */ 43603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_mknod_in *req = data; 43703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *path, buffer[PATH_BUFFER_SIZE]; 43803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *name = ((char*) data) + sizeof(*req); 43903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int res; 44003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("MKNOD %s @ %llx\n", name, hdr->nodeid); 44103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland path = node_get_path(node, buffer, name); 44203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 44303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland req->mode = (req->mode & (~0777)) | 0664; 44403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland res = mknod(path, req->mode, req->rdev); /* XXX perm?*/ 44503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (res < 0) { 44603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, -errno); 44703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } else { 44803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland lookup_entry(fuse, node, name, hdr->unique); 44903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 45003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 45103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 45203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_MKDIR: { /* mkdir_in, bytez[] -> entry_out */ 45303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_mkdir_in *req = data; 45403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_entry_out out; 45503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *path, buffer[PATH_BUFFER_SIZE]; 45603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *name = ((char*) data) + sizeof(*req); 45703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int res; 45803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("MKDIR %s @ %llx 0%o\n", name, hdr->nodeid, req->mode); 45903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland path = node_get_path(node, buffer, name); 46003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 46103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland req->mode = (req->mode & (~0777)) | 0775; 46203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland res = mkdir(path, req->mode); 46303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (res < 0) { 46403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, -errno); 46503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } else { 46603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland lookup_entry(fuse, node, name, hdr->unique); 46703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 46803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 46903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 47003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_UNLINK: { /* bytez[] -> */ 47103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *path, buffer[PATH_BUFFER_SIZE]; 47203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int res; 47303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("UNLINK %s @ %llx\n", (char*) data, hdr->nodeid); 47403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland path = node_get_path(node, buffer, (char*) data); 47503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland res = unlink(path); 47603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, res ? -errno : 0); 47703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 47803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 47903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_RMDIR: { /* bytez[] -> */ 48003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *path, buffer[PATH_BUFFER_SIZE]; 48103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int res; 48203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("RMDIR %s @ %llx\n", (char*) data, hdr->nodeid); 48303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland path = node_get_path(node, buffer, (char*) data); 48403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland res = rmdir(path); 48503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, res ? -errno : 0); 48603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 48703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 48803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_RENAME: { /* rename_in, oldname, newname -> */ 48903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_rename_in *req = data; 49003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *oldname = ((char*) data) + sizeof(*req); 49103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *newname = oldname + strlen(oldname) + 1; 49203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *oldpath, oldbuffer[PATH_BUFFER_SIZE]; 49303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *newpath, newbuffer[PATH_BUFFER_SIZE]; 49403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct node *newnode; 49503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int res; 49603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 49703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland newnode = lookup_by_inode(fuse, req->newdir); 49803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (!newnode) { 49903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, -ENOENT); 50003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 50103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 50203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 50303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland oldpath = node_get_path(node, oldbuffer, oldname); 50403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland newpath = node_get_path(newnode, newbuffer, newname); 50503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 50603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland res = rename(oldpath, newpath); 50703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, res ? -errno : 0); 50803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 50903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 51003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland// case FUSE_LINK: 51103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_OPEN: { /* open_in -> open_out */ 51203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_open_in *req = data; 51303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_open_out out; 51403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *path, buffer[PATH_BUFFER_SIZE]; 51503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct handle *h; 51603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 51703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland h = malloc(sizeof(*h)); 51803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (!h) { 51903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, -ENOMEM); 52003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 52103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 52203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 52303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland path = node_get_path(node, buffer, 0); 52403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("OPEN %llx '%s' 0%o fh=%p\n", hdr->nodeid, path, req->flags, h); 52503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland h->fd = open(path, req->flags); 52603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (h->fd < 0) { 52703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland ERROR("ERROR\n"); 52803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, errno); 52903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland free(h); 53003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 53103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 53203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.fh = ptr_to_id(h); 53303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.open_flags = 0; 53403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.padding = 0; 53503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_reply(fuse, hdr->unique, &out, sizeof(out)); 53603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 53703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 53803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_READ: { /* read_in -> byte[] */ 53903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char buffer[128 * 1024]; 54003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_read_in *req = data; 54103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct handle *h = id_to_ptr(req->fh); 54203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int res; 54303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("READ %p(%d) %u@%llu\n", h, h->fd, req->size, req->offset); 54403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (req->size > sizeof(buffer)) { 54503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, -EINVAL); 54603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 54703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 54803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland res = pread(h->fd, buffer, req->size, req->offset); 54903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (res < 0) { 55003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, errno); 55103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 55203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 55303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_reply(fuse, hdr->unique, buffer, res); 55403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 55503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 55603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_WRITE: { /* write_in, byte[write_in.size] -> write_out */ 55703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_write_in *req = data; 55803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_write_out out; 55903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct handle *h = id_to_ptr(req->fh); 56003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int res; 56103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("WRITE %p(%d) %u@%llu\n", h, h->fd, req->size, req->offset); 56203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland res = pwrite(h->fd, ((char*) data) + sizeof(*req), req->size, req->offset); 56303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (res < 0) { 56403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, errno); 56503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 56603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 56703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.size = res; 56803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_reply(fuse, hdr->unique, &out, sizeof(out)); 56903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland goto oops; 57003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 57103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland// case FUSE_STATFS: 57203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_RELEASE: { /* release_in -> */ 57303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_release_in *req = data; 57403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct handle *h = id_to_ptr(req->fh); 57503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("RELEASE %p(%d)\n", h, h->fd); 57603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland close(h->fd); 57703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland free(h); 57803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, 0); 57903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 58003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 58103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland// case FUSE_FSYNC: 58203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland// case FUSE_SETXATTR: 58303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland// case FUSE_GETXATTR: 58403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland// case FUSE_LISTXATTR: 58503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland// case FUSE_REMOVEXATTR: 58603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_FLUSH: 58703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, 0); 58803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 58903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_OPENDIR: { /* open_in -> open_out */ 59003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_open_in *req = data; 59103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_open_out out; 59203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *path, buffer[PATH_BUFFER_SIZE]; 59303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct dirhandle *h; 59403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 59503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland h = malloc(sizeof(*h)); 59603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (!h) { 59703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, -ENOMEM); 59803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 59903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 60003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 60103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland path = node_get_path(node, buffer, 0); 60203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("OPENDIR %llx '%s'\n", hdr->nodeid, path); 60303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland h->d = opendir(path); 60403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (h->d == 0) { 60503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland ERROR("ERROR\n"); 60603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, -errno); 60703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland free(h); 60803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 60903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 61003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.fh = ptr_to_id(h); 61103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_reply(fuse, hdr->unique, &out, sizeof(out)); 61203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 61303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 61403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_READDIR: { 61503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_read_in *req = data; 61603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char buffer[8192]; 61703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_dirent *fde = (struct fuse_dirent*) buffer; 61803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct dirent *de; 61903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct dirhandle *h = id_to_ptr(req->fh); 62003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("READDIR %p\n", h); 62103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland de = readdir(h->d); 62203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (!de) { 62303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, 0); 62403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 62503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 62603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fde->ino = FUSE_UNKNOWN_INO; 62703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fde->off = 0; 62803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fde->type = de->d_type; 62903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fde->namelen = strlen(de->d_name); 63003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland memcpy(fde->name, de->d_name, fde->namelen + 1); 63103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_reply(fuse, hdr->unique, fde, 63203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland FUSE_DIRENT_ALIGN(sizeof(struct fuse_dirent) + fde->namelen)); 63303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 63403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 63503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_RELEASEDIR: { /* release_in -> */ 63603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_release_in *req = data; 63703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct dirhandle *h = id_to_ptr(req->fh); 63803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("RELEASEDIR %p\n",h); 63903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland closedir(h->d); 64003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland free(h); 64103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, 0); 64203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 64303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 64403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland// case FUSE_FSYNCDIR: 64503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_INIT: { /* init_in -> init_out */ 64603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_init_in *req = data; 64703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_init_out out; 64803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 64903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("INIT ver=%d.%d maxread=%d flags=%x\n", 65003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland req->major, req->minor, req->max_readahead, req->flags); 65103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 65203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.major = FUSE_KERNEL_VERSION; 65303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.minor = FUSE_KERNEL_MINOR_VERSION; 65403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.max_readahead = req->max_readahead; 65503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.flags = 0; 65603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.max_background = 32; 65703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.congestion_threshold = 32; 65803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.max_write = 256 * 1024; 65903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 66003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_reply(fuse, hdr->unique, &out, sizeof(out)); 66103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 66203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 66303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland default: { 66403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_out_header h; 66503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland ERROR("NOTIMPL op=%d uniq=%llx nid=%llx\n", 66603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland hdr->opcode, hdr->unique, hdr->nodeid); 66703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 66803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland oops: 66903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland h.len = sizeof(h); 67003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland h.error = -ENOSYS; 67103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland h.unique = hdr->unique; 67203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland write(fuse->fd, &h, sizeof(h)); 67303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland break; 67403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 67503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 67603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 67703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 67803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandvoid handle_fuse_requests(struct fuse *fuse) 67903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 68003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland unsigned char req[256 * 1024 + 128]; 68103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int len; 68203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 68303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland for (;;) { 68403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland len = read(fuse->fd, req, 8192); 68503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (len < 0) { 68603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (errno == EINTR) 68703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland continue; 68803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland ERROR("handle_fuse_requests: errno=%d\n", errno); 68903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 69003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 69103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland handle_fuse_request(fuse, (void*) req, (void*) (req + sizeof(struct fuse_in_header)), len); 69203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 69303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 69403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 69503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandint main(int argc, char **argv) 69603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 69703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse fuse; 69803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char opts[256]; 69903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int fd; 70003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int res; 70103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland unsigned uid; 70203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland unsigned gid; 70303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland const char *path; 70403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 70503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (argc != 4) { 70603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland ERROR("usage: sdcard <path> <uid> <gid>\n"); 70703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return -1; 70803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 70903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 71003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland uid = strtoul(argv[2], 0, 10); 71103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland gid = strtoul(argv[3], 0, 10); 71203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (!uid || !gid) { 71303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland ERROR("uid and gid must be nonzero\n"); 71403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return -1; 71503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 71603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 71703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland path = argv[1]; 71803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 71903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland /* cleanup from previous instance, if necessary */ 72003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland umount2("/sdcard", 2); 72103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 72203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fd = open("/dev/fuse", O_RDWR); 72303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (fd < 0){ 72403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland ERROR("cannot open fuse device (%d)\n", errno); 72503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return -1; 72603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 72703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 72803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland sprintf(opts, "fd=%i,rootmode=40000,default_permissions,allow_other," 72903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland "user_id=%d,group_id=%d", fd, uid, gid); 73003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 73103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland res = mount("/dev/fuse", "/sdcard", "fuse", MS_NOSUID | MS_NODEV, opts); 73203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (res < 0) { 73303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland ERROR("cannot mount fuse filesystem (%d)\n", errno); 73403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return -1; 73503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 73603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 73703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (setgid(gid) < 0) { 73803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland ERROR("cannot setgid!\n"); 73903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return -1; 74003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 74103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (setuid(uid) < 0) { 74203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland ERROR("cannot setuid!\n"); 74303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return -1; 74403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 74503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 74603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_init(&fuse, fd, path); 74703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 74803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland umask(0); 74903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland handle_fuse_requests(&fuse); 75003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 75103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return 0; 75203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 753