sdcard.c revision 4553b08d7555a103fdbe8623a9cbd826a7e413ff
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> 254553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood#include <sys/statfs.h> 2603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland#include <sys/uio.h> 2703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland#include <dirent.h> 2803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 29b14a2c6e34b197870433386fb809d34b58b30fc0Brian Swetland#include <private/android_filesystem_config.h> 30b14a2c6e34b197870433386fb809d34b58b30fc0Brian Swetland 3103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland#include "fuse.h" 3203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 3303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland/* README 3403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * 3503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * What is this? 3603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * 3703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * sdcard is a program that uses FUSE to emulate FAT-on-sdcard style 3803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * directory permissions (all files are given fixed owner, group, and 3903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * permissions at creation, owner, group, and permissions are not 4003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * changeable, symlinks and hardlinks are not createable, etc. 4103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * 4203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * usage: sdcard <path> <uid> <gid> 4303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * 4403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * It must be run as root, but will change to uid/gid as soon as it 454553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood * mounts a filesystem on /mnt/sdcard. It will refuse to run if uid or 4603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * gid are zero. 4703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * 4803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * 4903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * Things I believe to be true: 5003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * 5103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * - ops that return a fuse_entry (LOOKUP, MKNOD, MKDIR, LINK, SYMLINK, 5203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * CREAT) must bump that node's refcount 5303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * - don't forget that FORGET can forget multiple references (req->nlookup) 5403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * - if an op that returns a fuse_entry fails writing the reply to the 5503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * kernel, you must rollback the refcount to reflect the reference the 5603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * kernel did not actually acquire 5703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * 5803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * 5903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * Bugs: 6003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * 6103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland * - need to move/rename node on RENAME 6203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland */ 6303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 6403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland#define FUSE_TRACE 0 6503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 6603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland#if FUSE_TRACE 6703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland#define TRACE(x...) fprintf(stderr,x) 6803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland#else 6903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland#define TRACE(x...) do {} while (0) 7003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland#endif 7103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 7203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland#define ERROR(x...) fprintf(stderr,x) 7303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 7403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland#define FUSE_UNKNOWN_INO 0xffffffff 7503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 764553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood#define MOUNT_POINT "/mnt/sdcard" 774553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood 7803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandstruct handle { 7903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct node *node; 8003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int fd; 8103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland}; 8203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 8303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandstruct dirhandle { 8403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct node *node; 8503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland DIR *d; 8603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland}; 8703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 8803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandstruct node { 8903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland __u64 nid; 9003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland __u64 gen; 9103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 9203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct node *next; 9303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct node *child; 9403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct node *all; 9503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct node *parent; 9603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 9703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland __u32 refcount; 9803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland __u32 namelen; 9903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 10003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char name[1]; 10103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland}; 10203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 10303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandstruct fuse { 10403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland __u64 next_generation; 10503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland __u64 next_node_id; 10603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 10703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int fd; 10803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 10903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct node *all; 11003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 11103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct node root; 11203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char rootpath[1024]; 11303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland}; 11403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 11503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland#define PATH_BUFFER_SIZE 1024 11603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 11703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandchar *node_get_path(struct node *node, char *buf, const char *name) 11803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 11903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *out = buf + PATH_BUFFER_SIZE - 1; 12003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int len; 12103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out[0] = 0; 12203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 12303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (name) { 12403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland len = strlen(name); 12503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland goto start; 12603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 12703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 12803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland while (node) { 12903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland name = node->name; 13003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland len = node->namelen; 13103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node = node->parent; 13203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland start: 13303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if ((len + 1) > (out - buf)) 13403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return 0; 13503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out -= len; 13603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland memcpy(out, name, len); 13703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out --; 13803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out[0] = '/'; 13903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 14003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 14103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return out; 14203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 14303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 14403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandvoid attr_from_stat(struct fuse_attr *attr, struct stat *s) 14503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 14603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland attr->ino = s->st_ino; 14703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland attr->size = s->st_size; 14803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland attr->blocks = s->st_blocks; 1494553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood attr->atime = s->st_atime; 1504553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood attr->mtime = s->st_mtime; 1514553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood attr->ctime = s->st_ctime; 1524553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood attr->atimensec = s->st_atime_nsec; 1534553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood attr->mtimensec = s->st_mtime_nsec; 1544553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood attr->ctimensec = s->st_ctime_nsec; 15503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland attr->mode = s->st_mode; 15603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland attr->nlink = s->st_nlink; 15703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 158b14a2c6e34b197870433386fb809d34b58b30fc0Brian Swetland /* force permissions to something reasonable: 159b14a2c6e34b197870433386fb809d34b58b30fc0Brian Swetland * world readable 160b14a2c6e34b197870433386fb809d34b58b30fc0Brian Swetland * writable by the sdcard group 161b14a2c6e34b197870433386fb809d34b58b30fc0Brian Swetland */ 162b14a2c6e34b197870433386fb809d34b58b30fc0Brian Swetland if (attr->mode & 0100) { 163b14a2c6e34b197870433386fb809d34b58b30fc0Brian Swetland attr->mode = (attr->mode & (~0777)) | 0775; 164b14a2c6e34b197870433386fb809d34b58b30fc0Brian Swetland } else { 165b14a2c6e34b197870433386fb809d34b58b30fc0Brian Swetland attr->mode = (attr->mode & (~0777)) | 0664; 166b14a2c6e34b197870433386fb809d34b58b30fc0Brian Swetland } 167b14a2c6e34b197870433386fb809d34b58b30fc0Brian Swetland 168b14a2c6e34b197870433386fb809d34b58b30fc0Brian Swetland /* all files owned by root.sdcard */ 169b14a2c6e34b197870433386fb809d34b58b30fc0Brian Swetland attr->uid = 0; 170b14a2c6e34b197870433386fb809d34b58b30fc0Brian Swetland attr->gid = AID_SDCARD_RW; 17103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 17203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 17303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandint node_get_attr(struct node *node, struct fuse_attr *attr) 17403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 17503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int res; 17603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct stat s; 17703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *path, buffer[PATH_BUFFER_SIZE]; 17803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 17903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland path = node_get_path(node, buffer, 0); 18003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland res = lstat(path, &s); 18103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (res < 0) { 18203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland ERROR("lstat('%s') errno %d\n", path, errno); 18303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return -1; 18403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 18503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 18603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland attr_from_stat(attr, &s); 18703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland attr->ino = node->nid; 18803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 18903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return 0; 19003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 19103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 19203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandstruct node *node_create(struct node *parent, const char *name, __u64 nid, __u64 gen) 19303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 19403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct node *node; 19503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int namelen = strlen(name); 19603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 19703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node = calloc(1, sizeof(struct node) + namelen); 19803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (node == 0) { 19903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return 0; 20003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 20103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 20203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node->nid = nid; 20303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node->gen = gen; 20403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node->parent = parent; 20503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node->next = parent->child; 20603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland parent->child = node; 20703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland memcpy(node->name, name, namelen + 1); 20803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node->namelen = namelen; 20903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland parent->refcount++; 21003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 21103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return node; 21203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 21303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 21403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandvoid fuse_init(struct fuse *fuse, int fd, const char *path) 21503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 21603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse->fd = fd; 21703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse->next_node_id = 2; 21803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse->next_generation = 0; 21903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 22003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse->all = &fuse->root; 22103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 22203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse->root.nid = FUSE_ROOT_ID; /* 1 */ 22303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse->root.next = 0; 22403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse->root.child = 0; 22503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse->root.parent = 0; 22603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 22703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse->root.all = 0; 22803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse->root.refcount = 2; 22903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 23003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland strcpy(fuse->root.name, path); 23103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse->root.namelen = strlen(fuse->root.name); 23203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 23303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 23403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandstatic inline void *id_to_ptr(__u64 nid) 23503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 23603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return (void *) nid; 23703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 23803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 23903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandstatic inline __u64 ptr_to_id(void *ptr) 24003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 24103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return (__u64) ptr; 24203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 24303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 24403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 24503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandstruct node *lookup_by_inode(struct fuse *fuse, __u64 nid) 24603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 24703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (nid == FUSE_ROOT_ID) { 24803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return &fuse->root; 24903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } else { 25003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return id_to_ptr(nid); 25103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 25203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 25303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 25403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandstruct node *lookup_child_by_name(struct node *node, const char *name) 25503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 25603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland for (node = node->child; node; node = node->next) { 25703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (!strcmp(name, node->name)) { 25803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return node; 25903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 26003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 26103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return 0; 26203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 26303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 26403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandstruct node *lookup_child_by_inode(struct node *node, __u64 nid) 26503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 26603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland for (node = node->child; node; node = node->next) { 26703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (node->nid == nid) { 26803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return node; 26903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 27003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 27103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return 0; 27203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 27303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 27403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandstruct node *node_lookup(struct fuse *fuse, struct node *parent, const char *name, 27503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_attr *attr) 27603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 27703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int res; 27803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct stat s; 27903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *path, buffer[PATH_BUFFER_SIZE]; 28003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct node *node; 28103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 28203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland path = node_get_path(parent, buffer, name); 28303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland /* XXX error? */ 28403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 28503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland res = lstat(path, &s); 28603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (res < 0) 28703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return 0; 28803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 28903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node = lookup_child_by_name(parent, name); 29003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (!node) { 29103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node = node_create(parent, name, fuse->next_node_id++, fuse->next_generation++); 29203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (!node) 29303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return 0; 29403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node->nid = ptr_to_id(node); 29503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node->all = fuse->all; 29603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse->all = node; 29703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 29803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 29903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland attr_from_stat(attr, &s); 30003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland attr->ino = node->nid; 30103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 30203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return node; 30303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 30403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 30503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandvoid node_release(struct node *node) 30603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 30703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("RELEASE %p (%s) rc=%d\n", node, node->name, node->refcount); 30803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node->refcount--; 30903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (node->refcount == 0) { 31003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (node->parent->child == node) { 31103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node->parent->child = node->parent->child->next; 31203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } else { 31303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct node *node2; 31403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 31503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node2 = node->parent->child; 31603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland while (node2->next != node) 31703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node2 = node2->next; 31803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node2->next = node->next; 31903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 32003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 32103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("DESTROY %p (%s)\n", node, node->name); 32203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 32303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node_release(node->parent); 32403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 32503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node->parent = 0; 32603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node->next = 0; 32703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 32803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland /* TODO: remove debugging - poison memory */ 32903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland memset(node, 0xef, sizeof(*node) + strlen(node->name)); 33003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 33103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland free(node); 33203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 33303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 33403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 33503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandvoid fuse_status(struct fuse *fuse, __u64 unique, int err) 33603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 33703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_out_header hdr; 33803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland hdr.len = sizeof(hdr); 33903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland hdr.error = err; 34003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland hdr.unique = unique; 34103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (err) { 34203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland// ERROR("*** %d ***\n", err); 34303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 34403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland write(fuse->fd, &hdr, sizeof(hdr)); 34503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 34603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 34703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandvoid fuse_reply(struct fuse *fuse, __u64 unique, void *data, int len) 34803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 34903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_out_header hdr; 35003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct iovec vec[2]; 35103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int res; 35203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 35303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland hdr.len = len + sizeof(hdr); 35403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland hdr.error = 0; 35503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland hdr.unique = unique; 35603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 35703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland vec[0].iov_base = &hdr; 35803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland vec[0].iov_len = sizeof(hdr); 35903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland vec[1].iov_base = data; 36003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland vec[1].iov_len = len; 36103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 36203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland res = writev(fuse->fd, vec, 2); 36303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (res < 0) { 36403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland ERROR("*** REPLY FAILED *** %d\n", errno); 36503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 36603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 36703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 36803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandvoid lookup_entry(struct fuse *fuse, struct node *node, 36903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland const char *name, __u64 unique) 37003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 37103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_entry_out out; 37203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 37303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland memset(&out, 0, sizeof(out)); 37403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 37503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node = node_lookup(fuse, node, name, &out.attr); 37603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (!node) { 37703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, unique, -ENOENT); 37803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 37903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 38003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 38103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node->refcount++; 38203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland// fprintf(stderr,"ACQUIRE %p (%s) rc=%d\n", node, node->name, node->refcount); 38303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.nodeid = node->nid; 38403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.generation = node->gen; 38503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.entry_valid = 10; 38603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.attr_valid = 10; 38703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 38803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_reply(fuse, unique, &out, sizeof(out)); 38903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 39003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 39103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandvoid handle_fuse_request(struct fuse *fuse, struct fuse_in_header *hdr, void *data, unsigned len) 39203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 39303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct node *node; 39403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 39503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if ((len < sizeof(*hdr)) || (hdr->len != len)) { 39603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland ERROR("malformed header\n"); 39703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 39803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 39903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 40003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland len -= hdr->len; 40103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 40203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (hdr->nodeid) { 40303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node = lookup_by_inode(fuse, hdr->nodeid); 40403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (!node) { 40503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, -ENOENT); 40603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 40703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 40803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } else { 40903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node = 0; 41003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 41103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 41203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland switch (hdr->opcode) { 41303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_LOOKUP: { /* bytez[] -> entry_out */ 41403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("LOOKUP %llx %s\n", hdr->nodeid, (char*) data); 41503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland lookup_entry(fuse, node, (char*) data, hdr->unique); 41603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 41703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 41803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_FORGET: { 41903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_forget_in *req = data; 42003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("FORGET %llx (%s) #%lld\n", hdr->nodeid, node->name, req->nlookup); 42103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland /* no reply */ 42203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland while (req->nlookup--) 42303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node_release(node); 42403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 42503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 42603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_GETATTR: { /* getattr_in -> attr_out */ 42703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_getattr_in *req = data; 42803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_attr_out out; 42903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 43003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("GETATTR flags=%x fh=%llx\n",req->getattr_flags, req->fh); 43103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 43203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland memset(&out, 0, sizeof(out)); 43303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node_get_attr(node, &out.attr); 43403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.attr_valid = 10; 43503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 43603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_reply(fuse, hdr->unique, &out, sizeof(out)); 43703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 43803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 43903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_SETATTR: { /* setattr_in -> attr_out */ 44003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_setattr_in *req = data; 44103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_attr_out out; 44203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("SETATTR fh=%llx id=%llx valid=%x\n", 44303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland req->fh, hdr->nodeid, req->valid); 44403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 44503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland /* XXX */ 44603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 44703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland memset(&out, 0, sizeof(out)); 44803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node_get_attr(node, &out.attr); 44903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.attr_valid = 10; 45003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_reply(fuse, hdr->unique, &out, sizeof(out)); 45103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 45203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 45303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland// case FUSE_READLINK: 45403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland// case FUSE_SYMLINK: 45503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_MKNOD: { /* mknod_in, bytez[] -> entry_out */ 45603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_mknod_in *req = data; 45703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *path, buffer[PATH_BUFFER_SIZE]; 45803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *name = ((char*) data) + sizeof(*req); 45903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int res; 46003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("MKNOD %s @ %llx\n", name, hdr->nodeid); 46103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland path = node_get_path(node, buffer, name); 46203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 46303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland req->mode = (req->mode & (~0777)) | 0664; 46403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland res = mknod(path, req->mode, req->rdev); /* XXX perm?*/ 46503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (res < 0) { 46603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, -errno); 46703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } else { 46803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland lookup_entry(fuse, node, name, hdr->unique); 46903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 47003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 47103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 47203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_MKDIR: { /* mkdir_in, bytez[] -> entry_out */ 47303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_mkdir_in *req = data; 47403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_entry_out out; 47503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *path, buffer[PATH_BUFFER_SIZE]; 47603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *name = ((char*) data) + sizeof(*req); 47703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int res; 47803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("MKDIR %s @ %llx 0%o\n", name, hdr->nodeid, req->mode); 47903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland path = node_get_path(node, buffer, name); 48003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 48103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland req->mode = (req->mode & (~0777)) | 0775; 48203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland res = mkdir(path, req->mode); 48303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (res < 0) { 48403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, -errno); 48503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } else { 48603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland lookup_entry(fuse, node, name, hdr->unique); 48703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 48803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 48903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 49003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_UNLINK: { /* bytez[] -> */ 49103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *path, buffer[PATH_BUFFER_SIZE]; 49203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int res; 49303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("UNLINK %s @ %llx\n", (char*) data, hdr->nodeid); 49403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland path = node_get_path(node, buffer, (char*) data); 49503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland res = unlink(path); 49603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, res ? -errno : 0); 49703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 49803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 49903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_RMDIR: { /* bytez[] -> */ 50003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *path, buffer[PATH_BUFFER_SIZE]; 50103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int res; 50203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("RMDIR %s @ %llx\n", (char*) data, hdr->nodeid); 50303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland path = node_get_path(node, buffer, (char*) data); 50403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland res = rmdir(path); 50503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, res ? -errno : 0); 50603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 50703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 50803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_RENAME: { /* rename_in, oldname, newname -> */ 50903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_rename_in *req = data; 51003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *oldname = ((char*) data) + sizeof(*req); 51103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *newname = oldname + strlen(oldname) + 1; 51203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *oldpath, oldbuffer[PATH_BUFFER_SIZE]; 51303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *newpath, newbuffer[PATH_BUFFER_SIZE]; 51403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct node *newnode; 51503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int res; 51603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 51703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland newnode = lookup_by_inode(fuse, req->newdir); 51803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (!newnode) { 51903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, -ENOENT); 52003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 52103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 52203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 52303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland oldpath = node_get_path(node, oldbuffer, oldname); 52403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland newpath = node_get_path(newnode, newbuffer, newname); 52503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 52603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland res = rename(oldpath, newpath); 52703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, res ? -errno : 0); 52803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 52903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 53003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland// case FUSE_LINK: 53103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_OPEN: { /* open_in -> open_out */ 53203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_open_in *req = data; 53303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_open_out out; 53403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *path, buffer[PATH_BUFFER_SIZE]; 53503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct handle *h; 53603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 53703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland h = malloc(sizeof(*h)); 53803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (!h) { 53903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, -ENOMEM); 54003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 54103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 54203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 54303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland path = node_get_path(node, buffer, 0); 54403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("OPEN %llx '%s' 0%o fh=%p\n", hdr->nodeid, path, req->flags, h); 54503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland h->fd = open(path, req->flags); 54603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (h->fd < 0) { 54703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland ERROR("ERROR\n"); 54803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, errno); 54903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland free(h); 55003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 55103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 55203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.fh = ptr_to_id(h); 55303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.open_flags = 0; 55403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.padding = 0; 55503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_reply(fuse, hdr->unique, &out, sizeof(out)); 55603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 55703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 55803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_READ: { /* read_in -> byte[] */ 55903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char buffer[128 * 1024]; 56003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_read_in *req = data; 56103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct handle *h = id_to_ptr(req->fh); 56203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int res; 56303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("READ %p(%d) %u@%llu\n", h, h->fd, req->size, req->offset); 56403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (req->size > sizeof(buffer)) { 56503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, -EINVAL); 56603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 56703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 56803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland res = pread(h->fd, buffer, req->size, req->offset); 56903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (res < 0) { 57003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, errno); 57103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 57203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 57303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_reply(fuse, hdr->unique, buffer, res); 57403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 57503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 57603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_WRITE: { /* write_in, byte[write_in.size] -> write_out */ 57703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_write_in *req = data; 57803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_write_out out; 57903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct handle *h = id_to_ptr(req->fh); 58003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int res; 58103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("WRITE %p(%d) %u@%llu\n", h, h->fd, req->size, req->offset); 58203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland res = pwrite(h->fd, ((char*) data) + sizeof(*req), req->size, req->offset); 58303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (res < 0) { 58403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, errno); 58503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 58603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 58703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.size = res; 58803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_reply(fuse, hdr->unique, &out, sizeof(out)); 58903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland goto oops; 59003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 5914553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood case FUSE_STATFS: { /* getattr_in -> attr_out */ 5924553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood struct statfs stat; 5934553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood struct fuse_statfs_out out; 5944553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood int res; 5954553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood 5964553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood TRACE("STATFS\n"); 5974553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood 5984553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood if (statfs(fuse->root.name, &stat)) { 5994553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood fuse_status(fuse, hdr->unique, -errno); 6004553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood return; 6014553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood } 6024553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood 6034553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood memset(&out, 0, sizeof(out)); 6044553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood out.st.blocks = stat.f_blocks; 6054553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood out.st.bfree = stat.f_bfree; 6064553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood out.st.bavail = stat.f_bavail; 6074553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood out.st.files = stat.f_files; 6084553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood out.st.ffree = stat.f_ffree; 6094553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood out.st.bsize = stat.f_bsize; 6104553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood out.st.namelen = stat.f_namelen; 6114553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood out.st.frsize = stat.f_frsize; 6124553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood fuse_reply(fuse, hdr->unique, &out, sizeof(out)); 6134553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood return; 6144553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood } 61503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_RELEASE: { /* release_in -> */ 61603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_release_in *req = data; 61703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct handle *h = id_to_ptr(req->fh); 61803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("RELEASE %p(%d)\n", h, h->fd); 61903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland close(h->fd); 62003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland free(h); 62103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, 0); 62203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 62303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 62403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland// case FUSE_FSYNC: 62503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland// case FUSE_SETXATTR: 62603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland// case FUSE_GETXATTR: 62703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland// case FUSE_LISTXATTR: 62803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland// case FUSE_REMOVEXATTR: 62903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_FLUSH: 63003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, 0); 63103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 63203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_OPENDIR: { /* open_in -> open_out */ 63303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_open_in *req = data; 63403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_open_out out; 63503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *path, buffer[PATH_BUFFER_SIZE]; 63603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct dirhandle *h; 63703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 63803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland h = malloc(sizeof(*h)); 63903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (!h) { 64003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, -ENOMEM); 64103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 64203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 64303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 64403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland path = node_get_path(node, buffer, 0); 64503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("OPENDIR %llx '%s'\n", hdr->nodeid, path); 64603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland h->d = opendir(path); 64703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (h->d == 0) { 64803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland ERROR("ERROR\n"); 64903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, -errno); 65003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland free(h); 65103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 65203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 65303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.fh = ptr_to_id(h); 65403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_reply(fuse, hdr->unique, &out, sizeof(out)); 65503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 65603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 65703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_READDIR: { 65803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_read_in *req = data; 65903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char buffer[8192]; 66003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_dirent *fde = (struct fuse_dirent*) buffer; 66103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct dirent *de; 66203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct dirhandle *h = id_to_ptr(req->fh); 66303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("READDIR %p\n", h); 66403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland de = readdir(h->d); 66503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (!de) { 66603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, 0); 66703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 66803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 66903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fde->ino = FUSE_UNKNOWN_INO; 67003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fde->off = 0; 67103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fde->type = de->d_type; 67203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fde->namelen = strlen(de->d_name); 67303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland memcpy(fde->name, de->d_name, fde->namelen + 1); 67403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_reply(fuse, hdr->unique, fde, 67503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland FUSE_DIRENT_ALIGN(sizeof(struct fuse_dirent) + fde->namelen)); 67603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 67703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 67803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_RELEASEDIR: { /* release_in -> */ 67903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_release_in *req = data; 68003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct dirhandle *h = id_to_ptr(req->fh); 68103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("RELEASEDIR %p\n",h); 68203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland closedir(h->d); 68303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland free(h); 68403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, 0); 68503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 68603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 68703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland// case FUSE_FSYNCDIR: 68803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_INIT: { /* init_in -> init_out */ 68903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_init_in *req = data; 69003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_init_out out; 69103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 69203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("INIT ver=%d.%d maxread=%d flags=%x\n", 69303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland req->major, req->minor, req->max_readahead, req->flags); 69403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 69503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.major = FUSE_KERNEL_VERSION; 69603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.minor = FUSE_KERNEL_MINOR_VERSION; 69703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.max_readahead = req->max_readahead; 69803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.flags = 0; 69903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.max_background = 32; 70003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.congestion_threshold = 32; 70103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.max_write = 256 * 1024; 70203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 70303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_reply(fuse, hdr->unique, &out, sizeof(out)); 70403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 70503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 70603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland default: { 70703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_out_header h; 70803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland ERROR("NOTIMPL op=%d uniq=%llx nid=%llx\n", 70903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland hdr->opcode, hdr->unique, hdr->nodeid); 71003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 71103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland oops: 71203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland h.len = sizeof(h); 71303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland h.error = -ENOSYS; 71403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland h.unique = hdr->unique; 71503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland write(fuse->fd, &h, sizeof(h)); 71603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland break; 71703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 71803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 71903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 72003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 72103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandvoid handle_fuse_requests(struct fuse *fuse) 72203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 72303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland unsigned char req[256 * 1024 + 128]; 72403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int len; 72503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 72603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland for (;;) { 72703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland len = read(fuse->fd, req, 8192); 72803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (len < 0) { 72903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (errno == EINTR) 73003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland continue; 73103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland ERROR("handle_fuse_requests: errno=%d\n", errno); 73203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 73303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 73403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland handle_fuse_request(fuse, (void*) req, (void*) (req + sizeof(struct fuse_in_header)), len); 73503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 73603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 73703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 73803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandint main(int argc, char **argv) 73903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 74003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse fuse; 74103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char opts[256]; 74203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int fd; 74303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int res; 74403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland unsigned uid; 74503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland unsigned gid; 74603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland const char *path; 74703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 74803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (argc != 4) { 74903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland ERROR("usage: sdcard <path> <uid> <gid>\n"); 75003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return -1; 75103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 75203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 75303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland uid = strtoul(argv[2], 0, 10); 75403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland gid = strtoul(argv[3], 0, 10); 75503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (!uid || !gid) { 75603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland ERROR("uid and gid must be nonzero\n"); 75703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return -1; 75803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 75903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 76003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland path = argv[1]; 76103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 76203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland /* cleanup from previous instance, if necessary */ 7634553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood umount2(MOUNT_POINT, 2); 76403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 76503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fd = open("/dev/fuse", O_RDWR); 76603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (fd < 0){ 76703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland ERROR("cannot open fuse device (%d)\n", errno); 76803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return -1; 76903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 77003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 77103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland sprintf(opts, "fd=%i,rootmode=40000,default_permissions,allow_other," 77203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland "user_id=%d,group_id=%d", fd, uid, gid); 77303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 7744553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood res = mount("/dev/fuse", MOUNT_POINT, "fuse", MS_NOSUID | MS_NODEV, opts); 77503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (res < 0) { 77603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland ERROR("cannot mount fuse filesystem (%d)\n", errno); 77703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return -1; 77803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 77903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 78003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (setgid(gid) < 0) { 78103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland ERROR("cannot setgid!\n"); 78203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return -1; 78303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 78403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (setuid(uid) < 0) { 78503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland ERROR("cannot setuid!\n"); 78603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return -1; 78703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 78803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 78903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_init(&fuse, fd, path); 79003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 79103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland umask(0); 79203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland handle_fuse_requests(&fuse); 79303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 79403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return 0; 79503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 796