sdcard.c revision 11ccdb3be67b22f677065715ace68aabf371acc7
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 6003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland#define FUSE_TRACE 0 6103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 6203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland#if FUSE_TRACE 6303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland#define TRACE(x...) fprintf(stderr,x) 6403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland#else 6503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland#define TRACE(x...) do {} while (0) 6603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland#endif 6703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 6803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland#define ERROR(x...) fprintf(stderr,x) 6903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 7003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland#define FUSE_UNKNOWN_INO 0xffffffff 7103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 724553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood#define MOUNT_POINT "/mnt/sdcard" 734553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood 7403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandstruct handle { 7503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct node *node; 7603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int fd; 7703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland}; 7803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 7903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandstruct dirhandle { 8003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct node *node; 8103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland DIR *d; 8203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland}; 8303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 8403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandstruct node { 8503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland __u64 nid; 8603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland __u64 gen; 8703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 8811ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham struct node *next; /* per-dir sibling list */ 8911ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham struct node *child; /* first contained file by this dir */ 9011ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham struct node *all; /* global node list */ 9111ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham struct node *parent; /* containing directory */ 9203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 9303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland __u32 refcount; 9403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland __u32 namelen; 9503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 9611ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham char *name; 9703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland}; 9803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 9903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandstruct fuse { 10003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland __u64 next_generation; 10103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland __u64 next_node_id; 10203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 10303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int fd; 10403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 10503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct node *all; 10603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 10703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct node root; 10803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char rootpath[1024]; 10903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland}; 11003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 11103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland#define PATH_BUFFER_SIZE 1024 11203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 113f43219e0b1022b257499289ceb951f6a1a44bf9cPaul Eastham/* 114f43219e0b1022b257499289ceb951f6a1a44bf9cPaul Eastham * Get the real-life absolute path to a node. 115f43219e0b1022b257499289ceb951f6a1a44bf9cPaul Eastham * node: start at this node 116f43219e0b1022b257499289ceb951f6a1a44bf9cPaul Eastham * buf: storage for returned string 117f43219e0b1022b257499289ceb951f6a1a44bf9cPaul Eastham * name: append this string to path if set 118f43219e0b1022b257499289ceb951f6a1a44bf9cPaul Eastham */ 11903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandchar *node_get_path(struct node *node, char *buf, const char *name) 12003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 12103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *out = buf + PATH_BUFFER_SIZE - 1; 12203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int len; 12303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out[0] = 0; 12403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 12503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (name) { 12603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland len = strlen(name); 12703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland goto start; 12803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 12903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 13003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland while (node) { 13103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland name = node->name; 13203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland len = node->namelen; 13303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node = node->parent; 13403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland start: 13503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if ((len + 1) > (out - buf)) 13603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return 0; 13703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out -= len; 13803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland memcpy(out, name, len); 13903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out --; 14003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out[0] = '/'; 14103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 14203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 14303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return out; 14403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 14503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 14603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandvoid attr_from_stat(struct fuse_attr *attr, struct stat *s) 14703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 14803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland attr->ino = s->st_ino; 14903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland attr->size = s->st_size; 15003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland attr->blocks = s->st_blocks; 1514553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood attr->atime = s->st_atime; 1524553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood attr->mtime = s->st_mtime; 1534553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood attr->ctime = s->st_ctime; 1544553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood attr->atimensec = s->st_atime_nsec; 1554553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood attr->mtimensec = s->st_mtime_nsec; 1564553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood attr->ctimensec = s->st_ctime_nsec; 15703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland attr->mode = s->st_mode; 15803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland attr->nlink = s->st_nlink; 15903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 160b14a2c6e34b197870433386fb809d34b58b30fc0Brian Swetland /* force permissions to something reasonable: 161b14a2c6e34b197870433386fb809d34b58b30fc0Brian Swetland * world readable 162b14a2c6e34b197870433386fb809d34b58b30fc0Brian Swetland * writable by the sdcard group 163b14a2c6e34b197870433386fb809d34b58b30fc0Brian Swetland */ 164b14a2c6e34b197870433386fb809d34b58b30fc0Brian Swetland if (attr->mode & 0100) { 165b14a2c6e34b197870433386fb809d34b58b30fc0Brian Swetland attr->mode = (attr->mode & (~0777)) | 0775; 166b14a2c6e34b197870433386fb809d34b58b30fc0Brian Swetland } else { 167b14a2c6e34b197870433386fb809d34b58b30fc0Brian Swetland attr->mode = (attr->mode & (~0777)) | 0664; 168b14a2c6e34b197870433386fb809d34b58b30fc0Brian Swetland } 169b14a2c6e34b197870433386fb809d34b58b30fc0Brian Swetland 170b14a2c6e34b197870433386fb809d34b58b30fc0Brian Swetland /* all files owned by root.sdcard */ 171b14a2c6e34b197870433386fb809d34b58b30fc0Brian Swetland attr->uid = 0; 172b14a2c6e34b197870433386fb809d34b58b30fc0Brian Swetland attr->gid = AID_SDCARD_RW; 17303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 17403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 17503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandint node_get_attr(struct node *node, struct fuse_attr *attr) 17603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 17703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int res; 17803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct stat s; 17903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *path, buffer[PATH_BUFFER_SIZE]; 18003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 18103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland path = node_get_path(node, buffer, 0); 18203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland res = lstat(path, &s); 18303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (res < 0) { 18403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland ERROR("lstat('%s') errno %d\n", path, errno); 18503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return -1; 18603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 18703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 18803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland attr_from_stat(attr, &s); 18903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland attr->ino = node->nid; 19003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 19103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return 0; 19203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 19303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 19411ccdb3be67b22f677065715ace68aabf371acc7Paul Easthamstatic void add_node_to_parent(struct node *node, struct node *parent) { 19511ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham node->parent = parent; 19611ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham node->next = parent->child; 19711ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham parent->child = node; 19811ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham} 19911ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham 20003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandstruct node *node_create(struct node *parent, const char *name, __u64 nid, __u64 gen) 20103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 20203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct node *node; 20303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int namelen = strlen(name); 20403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 20511ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham node = calloc(1, sizeof(struct node)); 20603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (node == 0) { 20703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return 0; 20803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 20911ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham node->name = malloc(namelen + 1); 21011ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham if (node->name == 0) { 21111ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham free(node); 21211ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham return 0; 21311ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham } 21403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 21503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node->nid = nid; 21603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node->gen = gen; 21711ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham add_node_to_parent(node, parent); 21803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland memcpy(node->name, name, namelen + 1); 21903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node->namelen = namelen; 22003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland parent->refcount++; 22103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 22203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return node; 22303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 22403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 22511ccdb3be67b22f677065715ace68aabf371acc7Paul Easthamstatic char *rename_node(struct node *node, const char *name) 22611ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham{ 22711ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham node->namelen = strlen(name); 22811ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham char *newname = realloc(node->name, node->namelen + 1); 22911ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham if (newname == 0) 23011ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham return 0; 23111ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham node->name = newname; 23211ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham memcpy(node->name, name, node->namelen + 1); 23311ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham return node->name; 23411ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham} 23511ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham 23603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandvoid fuse_init(struct fuse *fuse, int fd, const char *path) 23703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 23803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse->fd = fd; 23903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse->next_node_id = 2; 24003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse->next_generation = 0; 24103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 24203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse->all = &fuse->root; 24303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 24403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse->root.nid = FUSE_ROOT_ID; /* 1 */ 24503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse->root.next = 0; 24603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse->root.child = 0; 24703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse->root.parent = 0; 24803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 24903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse->root.all = 0; 25003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse->root.refcount = 2; 25103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 25211ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham fuse->root.name = 0; 25311ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham rename_node(&fuse->root, path); 25403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 25503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 25603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandstatic inline void *id_to_ptr(__u64 nid) 25703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 25803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return (void *) nid; 25903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 26003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 26103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandstatic inline __u64 ptr_to_id(void *ptr) 26203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 26303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return (__u64) ptr; 26403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 26503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 26603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 26703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandstruct node *lookup_by_inode(struct fuse *fuse, __u64 nid) 26803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 26903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (nid == FUSE_ROOT_ID) { 27003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return &fuse->root; 27103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } else { 27203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return id_to_ptr(nid); 27303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 27403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 27503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 27603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandstruct node *lookup_child_by_name(struct node *node, const char *name) 27703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 27803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland for (node = node->child; node; node = node->next) { 27903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (!strcmp(name, node->name)) { 28003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return node; 28103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 28203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 28303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return 0; 28403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 28503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 28603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandstruct node *lookup_child_by_inode(struct node *node, __u64 nid) 28703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 28803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland for (node = node->child; node; node = node->next) { 28903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (node->nid == nid) { 29003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return node; 29103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 29203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 29303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return 0; 29403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 29503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 29611ccdb3be67b22f677065715ace68aabf371acc7Paul Easthamstatic struct node *remove_child(struct node *parent, __u64 nid) 29711ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham{ 29811ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham struct node *prev = 0; 29911ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham struct node *node; 30011ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham 30111ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham for (node = parent->child; node; node = node->next) { 30211ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham if (node->nid == nid) { 30311ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham if (prev) { 30411ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham prev->next = node->next; 30511ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham } else { 30611ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham parent->child = node->next; 30711ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham } 30811ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham node->next = 0; 30911ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham node->parent = 0; 31011ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham return node; 31111ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham } 31211ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham prev = node; 31311ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham } 31411ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham return 0; 31511ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham} 31611ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham 31703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandstruct node *node_lookup(struct fuse *fuse, struct node *parent, const char *name, 31803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_attr *attr) 31903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 32003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int res; 32103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct stat s; 32203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *path, buffer[PATH_BUFFER_SIZE]; 32303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct node *node; 32403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 32503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland path = node_get_path(parent, buffer, name); 32603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland /* XXX error? */ 32703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 32803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland res = lstat(path, &s); 32903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (res < 0) 33003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return 0; 33103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 33203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node = lookup_child_by_name(parent, name); 33303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (!node) { 33403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node = node_create(parent, name, fuse->next_node_id++, fuse->next_generation++); 33503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (!node) 33603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return 0; 33703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node->nid = ptr_to_id(node); 33803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node->all = fuse->all; 33903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse->all = node; 34003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 34103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 34203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland attr_from_stat(attr, &s); 34303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland attr->ino = node->nid; 34403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 34503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return node; 34603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 34703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 34803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandvoid node_release(struct node *node) 34903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 35003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("RELEASE %p (%s) rc=%d\n", node, node->name, node->refcount); 35103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node->refcount--; 35203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (node->refcount == 0) { 35303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (node->parent->child == node) { 35403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node->parent->child = node->parent->child->next; 35503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } else { 35603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct node *node2; 35703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 35803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node2 = node->parent->child; 35903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland while (node2->next != node) 36003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node2 = node2->next; 36103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node2->next = node->next; 36203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 36303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 36403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("DESTROY %p (%s)\n", node, node->name); 36503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 36603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node_release(node->parent); 36703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 36803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node->parent = 0; 36903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node->next = 0; 37003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 37103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland /* TODO: remove debugging - poison memory */ 37211ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham memset(node->name, 0xef, node->namelen); 37311ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham free(node->name); 37411ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham memset(node, 0xef, sizeof(*node)); 37503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland free(node); 37603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 37703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 37803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 37903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandvoid fuse_status(struct fuse *fuse, __u64 unique, int err) 38003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 38103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_out_header hdr; 38203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland hdr.len = sizeof(hdr); 38303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland hdr.error = err; 38403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland hdr.unique = unique; 38503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (err) { 38603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland// ERROR("*** %d ***\n", err); 38703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 38803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland write(fuse->fd, &hdr, sizeof(hdr)); 38903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 39003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 39103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandvoid fuse_reply(struct fuse *fuse, __u64 unique, void *data, int len) 39203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 39303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_out_header hdr; 39403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct iovec vec[2]; 39503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int res; 39603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 39703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland hdr.len = len + sizeof(hdr); 39803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland hdr.error = 0; 39903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland hdr.unique = unique; 40003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 40103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland vec[0].iov_base = &hdr; 40203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland vec[0].iov_len = sizeof(hdr); 40303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland vec[1].iov_base = data; 40403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland vec[1].iov_len = len; 40503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 40603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland res = writev(fuse->fd, vec, 2); 40703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (res < 0) { 40803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland ERROR("*** REPLY FAILED *** %d\n", errno); 40903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 41003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 41103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 41203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandvoid lookup_entry(struct fuse *fuse, struct node *node, 41303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland const char *name, __u64 unique) 41403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 41503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_entry_out out; 41603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 41703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland memset(&out, 0, sizeof(out)); 41803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 41903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node = node_lookup(fuse, node, name, &out.attr); 42003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (!node) { 42103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, unique, -ENOENT); 42203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 42303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 42403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 42503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node->refcount++; 42603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland// fprintf(stderr,"ACQUIRE %p (%s) rc=%d\n", node, node->name, node->refcount); 42703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.nodeid = node->nid; 42803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.generation = node->gen; 42903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.entry_valid = 10; 43003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.attr_valid = 10; 43103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 43203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_reply(fuse, unique, &out, sizeof(out)); 43303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 43403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 43503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandvoid handle_fuse_request(struct fuse *fuse, struct fuse_in_header *hdr, void *data, unsigned len) 43603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 43703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct node *node; 43803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 43903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if ((len < sizeof(*hdr)) || (hdr->len != len)) { 44003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland ERROR("malformed header\n"); 44103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 44203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 44303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 44403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland len -= hdr->len; 44503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 44603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (hdr->nodeid) { 44703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node = lookup_by_inode(fuse, hdr->nodeid); 44803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (!node) { 44903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, -ENOENT); 45003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 45103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 45203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } else { 45303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node = 0; 45403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 45503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 45603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland switch (hdr->opcode) { 45703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_LOOKUP: { /* bytez[] -> entry_out */ 45803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("LOOKUP %llx %s\n", hdr->nodeid, (char*) data); 45903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland lookup_entry(fuse, node, (char*) data, hdr->unique); 46003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 46103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 46203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_FORGET: { 46303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_forget_in *req = data; 46403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("FORGET %llx (%s) #%lld\n", hdr->nodeid, node->name, req->nlookup); 46503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland /* no reply */ 46603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland while (req->nlookup--) 46703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node_release(node); 46803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 46903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 47003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_GETATTR: { /* getattr_in -> attr_out */ 47103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_getattr_in *req = data; 47203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_attr_out out; 47303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 47411ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham TRACE("GETATTR flags=%x fh=%llx\n", req->getattr_flags, req->fh); 47503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 47603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland memset(&out, 0, sizeof(out)); 47703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node_get_attr(node, &out.attr); 47803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.attr_valid = 10; 47903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 48003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_reply(fuse, hdr->unique, &out, sizeof(out)); 48103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 48203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 48303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_SETATTR: { /* setattr_in -> attr_out */ 48403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_setattr_in *req = data; 48503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_attr_out out; 486f43219e0b1022b257499289ceb951f6a1a44bf9cPaul Eastham char *path, buffer[PATH_BUFFER_SIZE]; 487f43219e0b1022b257499289ceb951f6a1a44bf9cPaul Eastham int res = 0; 488f43219e0b1022b257499289ceb951f6a1a44bf9cPaul Eastham 48903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("SETATTR fh=%llx id=%llx valid=%x\n", 49003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland req->fh, hdr->nodeid, req->valid); 49103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 492f43219e0b1022b257499289ceb951f6a1a44bf9cPaul Eastham /* XXX: incomplete implementation -- truncate only. chmod/chown 493f43219e0b1022b257499289ceb951f6a1a44bf9cPaul Eastham * should NEVER be implemented. */ 494f43219e0b1022b257499289ceb951f6a1a44bf9cPaul Eastham 495f43219e0b1022b257499289ceb951f6a1a44bf9cPaul Eastham path = node_get_path(node, buffer, 0); 496f43219e0b1022b257499289ceb951f6a1a44bf9cPaul Eastham if (req->valid & FATTR_SIZE) 497f43219e0b1022b257499289ceb951f6a1a44bf9cPaul Eastham res = truncate(path, req->size); 49803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 49903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland memset(&out, 0, sizeof(out)); 50003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland node_get_attr(node, &out.attr); 50103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.attr_valid = 10; 502f43219e0b1022b257499289ceb951f6a1a44bf9cPaul Eastham 503f43219e0b1022b257499289ceb951f6a1a44bf9cPaul Eastham if (res) 504f43219e0b1022b257499289ceb951f6a1a44bf9cPaul Eastham fuse_status(fuse, hdr->unique, -errno); 505f43219e0b1022b257499289ceb951f6a1a44bf9cPaul Eastham else 506f43219e0b1022b257499289ceb951f6a1a44bf9cPaul Eastham fuse_reply(fuse, hdr->unique, &out, sizeof(out)); 50703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 50803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 50903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland// case FUSE_READLINK: 51003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland// case FUSE_SYMLINK: 51103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_MKNOD: { /* mknod_in, bytez[] -> entry_out */ 51203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_mknod_in *req = data; 51303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *path, buffer[PATH_BUFFER_SIZE]; 51403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *name = ((char*) data) + sizeof(*req); 51503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int res; 51603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("MKNOD %s @ %llx\n", name, hdr->nodeid); 51703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland path = node_get_path(node, buffer, name); 51803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 51903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland req->mode = (req->mode & (~0777)) | 0664; 52003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland res = mknod(path, req->mode, req->rdev); /* XXX perm?*/ 52103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (res < 0) { 52203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, -errno); 52303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } else { 52403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland lookup_entry(fuse, node, name, hdr->unique); 52503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 52603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 52703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 52803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_MKDIR: { /* mkdir_in, bytez[] -> entry_out */ 52903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_mkdir_in *req = data; 53003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_entry_out out; 53103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *path, buffer[PATH_BUFFER_SIZE]; 53203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *name = ((char*) data) + sizeof(*req); 53303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int res; 53403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("MKDIR %s @ %llx 0%o\n", name, hdr->nodeid, req->mode); 53503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland path = node_get_path(node, buffer, name); 53603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 53703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland req->mode = (req->mode & (~0777)) | 0775; 53803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland res = mkdir(path, req->mode); 53903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (res < 0) { 54003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, -errno); 54103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } else { 54203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland lookup_entry(fuse, node, name, hdr->unique); 54303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 54403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 54503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 54603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_UNLINK: { /* bytez[] -> */ 54703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *path, buffer[PATH_BUFFER_SIZE]; 54803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int res; 54903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("UNLINK %s @ %llx\n", (char*) data, hdr->nodeid); 55003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland path = node_get_path(node, buffer, (char*) data); 55103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland res = unlink(path); 55203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, res ? -errno : 0); 55303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 55403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 55503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_RMDIR: { /* bytez[] -> */ 55603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *path, buffer[PATH_BUFFER_SIZE]; 55703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int res; 55803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("RMDIR %s @ %llx\n", (char*) data, hdr->nodeid); 55903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland path = node_get_path(node, buffer, (char*) data); 56003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland res = rmdir(path); 56103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, res ? -errno : 0); 56203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 56303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 56403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_RENAME: { /* rename_in, oldname, newname -> */ 56503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_rename_in *req = data; 56603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *oldname = ((char*) data) + sizeof(*req); 56703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *newname = oldname + strlen(oldname) + 1; 56803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *oldpath, oldbuffer[PATH_BUFFER_SIZE]; 56903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *newpath, newbuffer[PATH_BUFFER_SIZE]; 57011ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham struct node *target; 57111ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham struct node *newparent; 57203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int res; 57303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 57411ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham TRACE("RENAME %s->%s @ %llx\n", oldname, newname, hdr->nodeid); 57511ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham 57611ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham target = lookup_child_by_name(node, oldname); 57711ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham if (!target) { 57803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, -ENOENT); 57903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 58003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 58103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland oldpath = node_get_path(node, oldbuffer, oldname); 58211ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham 58311ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham newparent = lookup_by_inode(fuse, req->newdir); 58411ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham if (!newparent) { 58511ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham fuse_status(fuse, hdr->unique, -ENOENT); 58611ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham return; 58711ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham } 58811ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham newpath = node_get_path(newparent, newbuffer, newname); 58911ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham 59011ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham if (!remove_child(node, target->nid)) { 59111ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham ERROR("RENAME remove_child not found"); 59211ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham fuse_status(fuse, hdr->unique, -ENOENT); 59311ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham return; 59411ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham } 59511ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham if (!rename_node(target, newname)) { 59611ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham fuse_status(fuse, hdr->unique, -ENOMEM); 59711ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham return; 59811ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham } 59911ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham add_node_to_parent(target, newparent); 60003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 60103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland res = rename(oldpath, newpath); 60211ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham TRACE("RENAME result %d\n", res); 60311ccdb3be67b22f677065715ace68aabf371acc7Paul Eastham 60403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, res ? -errno : 0); 60503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 60603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 60703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland// case FUSE_LINK: 60803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_OPEN: { /* open_in -> open_out */ 60903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_open_in *req = data; 61003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_open_out out; 61103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *path, buffer[PATH_BUFFER_SIZE]; 61203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct handle *h; 61303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 61403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland h = malloc(sizeof(*h)); 61503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (!h) { 61603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, -ENOMEM); 61703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 61803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 61903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 62003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland path = node_get_path(node, buffer, 0); 62103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("OPEN %llx '%s' 0%o fh=%p\n", hdr->nodeid, path, req->flags, h); 62203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland h->fd = open(path, req->flags); 62303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (h->fd < 0) { 62403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland ERROR("ERROR\n"); 62503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, errno); 62603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland free(h); 62703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 62803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 62903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.fh = ptr_to_id(h); 63003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.open_flags = 0; 63103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.padding = 0; 63203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_reply(fuse, hdr->unique, &out, sizeof(out)); 63303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 63403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 63503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_READ: { /* read_in -> byte[] */ 63603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char buffer[128 * 1024]; 63703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_read_in *req = data; 63803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct handle *h = id_to_ptr(req->fh); 63903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int res; 64003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("READ %p(%d) %u@%llu\n", h, h->fd, req->size, req->offset); 64103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (req->size > sizeof(buffer)) { 64203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, -EINVAL); 64303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 64403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 64503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland res = pread(h->fd, buffer, req->size, req->offset); 64603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (res < 0) { 64703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, errno); 64803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 64903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 65003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_reply(fuse, hdr->unique, buffer, res); 65103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 65203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 65303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_WRITE: { /* write_in, byte[write_in.size] -> write_out */ 65403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_write_in *req = data; 65503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_write_out out; 65603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct handle *h = id_to_ptr(req->fh); 65703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int res; 65803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("WRITE %p(%d) %u@%llu\n", h, h->fd, req->size, req->offset); 65903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland res = pwrite(h->fd, ((char*) data) + sizeof(*req), req->size, req->offset); 66003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (res < 0) { 66103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, errno); 66203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 66303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 66403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.size = res; 66503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_reply(fuse, hdr->unique, &out, sizeof(out)); 66603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland goto oops; 66703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 6684553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood case FUSE_STATFS: { /* getattr_in -> attr_out */ 6694553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood struct statfs stat; 6704553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood struct fuse_statfs_out out; 6714553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood int res; 6724553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood 6734553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood TRACE("STATFS\n"); 6744553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood 6754553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood if (statfs(fuse->root.name, &stat)) { 6764553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood fuse_status(fuse, hdr->unique, -errno); 6774553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood return; 6784553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood } 6794553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood 6804553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood memset(&out, 0, sizeof(out)); 6814553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood out.st.blocks = stat.f_blocks; 6824553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood out.st.bfree = stat.f_bfree; 6834553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood out.st.bavail = stat.f_bavail; 6844553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood out.st.files = stat.f_files; 6854553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood out.st.ffree = stat.f_ffree; 6864553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood out.st.bsize = stat.f_bsize; 6874553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood out.st.namelen = stat.f_namelen; 6884553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood out.st.frsize = stat.f_frsize; 6894553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood fuse_reply(fuse, hdr->unique, &out, sizeof(out)); 6904553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood return; 6914553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood } 69203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_RELEASE: { /* release_in -> */ 69303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_release_in *req = data; 69403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct handle *h = id_to_ptr(req->fh); 69503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("RELEASE %p(%d)\n", h, h->fd); 69603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland close(h->fd); 69703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland free(h); 69803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, 0); 69903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 70003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 70103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland// case FUSE_FSYNC: 70203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland// case FUSE_SETXATTR: 70303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland// case FUSE_GETXATTR: 70403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland// case FUSE_LISTXATTR: 70503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland// case FUSE_REMOVEXATTR: 70603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_FLUSH: 70703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, 0); 70803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 70903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_OPENDIR: { /* open_in -> open_out */ 71003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_open_in *req = data; 71103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_open_out out; 71203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char *path, buffer[PATH_BUFFER_SIZE]; 71303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct dirhandle *h; 71403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 71503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland h = malloc(sizeof(*h)); 71603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (!h) { 71703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, -ENOMEM); 71803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 71903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 72003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 72103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland path = node_get_path(node, buffer, 0); 72203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("OPENDIR %llx '%s'\n", hdr->nodeid, path); 72303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland h->d = opendir(path); 72403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (h->d == 0) { 72503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland ERROR("ERROR\n"); 72603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, -errno); 72703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland free(h); 72803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 72903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 73003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.fh = ptr_to_id(h); 73103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_reply(fuse, hdr->unique, &out, sizeof(out)); 73203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 73303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 73403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_READDIR: { 73503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_read_in *req = data; 73603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char buffer[8192]; 73703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_dirent *fde = (struct fuse_dirent*) buffer; 73803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct dirent *de; 73903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct dirhandle *h = id_to_ptr(req->fh); 74003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("READDIR %p\n", h); 74103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland de = readdir(h->d); 74203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (!de) { 74303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, 0); 74403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 74503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 74603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fde->ino = FUSE_UNKNOWN_INO; 74703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fde->off = 0; 74803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fde->type = de->d_type; 74903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fde->namelen = strlen(de->d_name); 75003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland memcpy(fde->name, de->d_name, fde->namelen + 1); 75103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_reply(fuse, hdr->unique, fde, 75203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland FUSE_DIRENT_ALIGN(sizeof(struct fuse_dirent) + fde->namelen)); 75303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 75403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 75503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_RELEASEDIR: { /* release_in -> */ 75603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_release_in *req = data; 75703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct dirhandle *h = id_to_ptr(req->fh); 75803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("RELEASEDIR %p\n",h); 75903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland closedir(h->d); 76003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland free(h); 76103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_status(fuse, hdr->unique, 0); 76203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 76303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 76403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland// case FUSE_FSYNCDIR: 76503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland case FUSE_INIT: { /* init_in -> init_out */ 76603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_init_in *req = data; 76703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_init_out out; 76803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 76903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland TRACE("INIT ver=%d.%d maxread=%d flags=%x\n", 77003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland req->major, req->minor, req->max_readahead, req->flags); 77103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 77203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.major = FUSE_KERNEL_VERSION; 77303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.minor = FUSE_KERNEL_MINOR_VERSION; 77403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.max_readahead = req->max_readahead; 775fc1a13bfdd9f7acd36bd4ae8f87cd57aa298f5acMike Lockwood out.flags = FUSE_ATOMIC_O_TRUNC; 77603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.max_background = 32; 77703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.congestion_threshold = 32; 77803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland out.max_write = 256 * 1024; 77903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 78003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_reply(fuse, hdr->unique, &out, sizeof(out)); 78103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 78203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 78303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland default: { 78403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse_out_header h; 78503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland ERROR("NOTIMPL op=%d uniq=%llx nid=%llx\n", 78603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland hdr->opcode, hdr->unique, hdr->nodeid); 78703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 78803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland oops: 78903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland h.len = sizeof(h); 79003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland h.error = -ENOSYS; 79103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland h.unique = hdr->unique; 79203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland write(fuse->fd, &h, sizeof(h)); 79303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland break; 79403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 79503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 79603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 79703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 79803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandvoid handle_fuse_requests(struct fuse *fuse) 79903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 80003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland unsigned char req[256 * 1024 + 128]; 80103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int len; 80203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 80303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland for (;;) { 80403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland len = read(fuse->fd, req, 8192); 80503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (len < 0) { 80603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (errno == EINTR) 80703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland continue; 80803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland ERROR("handle_fuse_requests: errno=%d\n", errno); 80903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return; 81003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 81103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland handle_fuse_request(fuse, (void*) req, (void*) (req + sizeof(struct fuse_in_header)), len); 81203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 81303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 81403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 81503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetlandint main(int argc, char **argv) 81603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland{ 81703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland struct fuse fuse; 81803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland char opts[256]; 81903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int fd; 82003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland int res; 82103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland unsigned uid; 82203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland unsigned gid; 82303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland const char *path; 82403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 82503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (argc != 4) { 82603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland ERROR("usage: sdcard <path> <uid> <gid>\n"); 82703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return -1; 82803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 82903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 83003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland uid = strtoul(argv[2], 0, 10); 83103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland gid = strtoul(argv[3], 0, 10); 83203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (!uid || !gid) { 83303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland ERROR("uid and gid must be nonzero\n"); 83403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return -1; 83503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 83603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 83703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland path = argv[1]; 83803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 83903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland /* cleanup from previous instance, if necessary */ 8404553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood umount2(MOUNT_POINT, 2); 84103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 84203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fd = open("/dev/fuse", O_RDWR); 84303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (fd < 0){ 84403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland ERROR("cannot open fuse device (%d)\n", errno); 84503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return -1; 84603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 84703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 84803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland sprintf(opts, "fd=%i,rootmode=40000,default_permissions,allow_other," 84903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland "user_id=%d,group_id=%d", fd, uid, gid); 85003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 8514553b08d7555a103fdbe8623a9cbd826a7e413ffMike Lockwood res = mount("/dev/fuse", MOUNT_POINT, "fuse", MS_NOSUID | MS_NODEV, opts); 85203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (res < 0) { 85303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland ERROR("cannot mount fuse filesystem (%d)\n", errno); 85403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return -1; 85503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 85603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 85703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (setgid(gid) < 0) { 85803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland ERROR("cannot setgid!\n"); 85903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return -1; 86003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 86103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland if (setuid(uid) < 0) { 86203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland ERROR("cannot setuid!\n"); 86303ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return -1; 86403ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland } 86503ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 86603ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland fuse_init(&fuse, fd, path); 86703ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 86803ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland umask(0); 86903ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland handle_fuse_requests(&fuse); 87003ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland 87103ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland return 0; 87203ee9479a4ed67689b9bbccda20c60800a38b178Brian Swetland} 873