Split extfs frontends into their own files.
This commit is contained in:
Jonas 'Sortie' Termansen
parent
de21e9c8e2
commit
26336de7ff
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@ -27,6 +27,7 @@
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#include <stddef.h>
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#include <stdint.h>
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#include <string.h>
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#include <unistd.h>
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#include "block.h"
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#include "device.h"
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@ -52,6 +53,7 @@ Device::~Device()
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Sync();
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while ( mru_block )
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delete mru_block;
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close(fd);
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}
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Block* Device::GetBlock(uint32_t block_id)
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1256
ext/extfs.cpp
1256
ext/extfs.cpp
File diff suppressed because it is too large
Load Diff
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@ -0,0 +1,32 @@
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/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2015.
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This program is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the Free
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Software Foundation, either version 3 of the License, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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You should have received a copy of the GNU General Public License along with
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this program. If not, see <http://www.gnu.org/licenses/>.
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extfs.h
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Implementation of the extended filesystem.
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*******************************************************************************/
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#ifndef EXTFS_H
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#define EXTFS_H
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class Inode;
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mode_t HostModeFromExtMode(uint32_t extmode);
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uint32_t ExtModeFromHostMode(mode_t hostmode);
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void StatInode(Inode* inode, struct stat* st);
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#endif
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@ -0,0 +1,717 @@
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/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2013, 2014, 2015.
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This program is free software: you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the Free
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Software Foundation, either version 3 of the License, or (at your option)
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any later version.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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more details.
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You should have received a copy of the GNU General Public License along with
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this program. If not, see <http://www.gnu.org/licenses/>.
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fsmarshall.cpp
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Sortix fsmarshall frontend.
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*******************************************************************************/
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#if defined(__sortix__)
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#include <sys/socket.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <errno.h>
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#include <error.h>
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#include <fcntl.h>
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#include <ioleast.h>
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#include <signal.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <timespec.h>
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#include <unistd.h>
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#include <sortix/dirent.h>
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#include <fsmarshall.h>
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#include "ext-constants.h"
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#include "ext-structs.h"
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#include "blockgroup.h"
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#include "block.h"
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#include "device.h"
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#include "extfs.h"
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#include "filesystem.h"
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#include "fsmarshall.h"
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#include "fuse.h"
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#include "inode.h"
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bool RespondData(int chl, const void* ptr, size_t count)
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{
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return writeall(chl, ptr, count) == count;
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}
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bool RespondHeader(int chl, size_t type, size_t size)
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{
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struct fsm_msg_header hdr;
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hdr.msgtype = type;
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hdr.msgsize = size;
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return RespondData(chl, &hdr, sizeof(hdr));
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}
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bool RespondMessage(int chl, unsigned int type, const void* ptr, size_t count)
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{
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return RespondHeader(chl, type, count) &&
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RespondData(chl, ptr, count);
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}
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bool RespondError(int chl, int errnum)
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{
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struct fsm_resp_error body;
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body.errnum = errnum;
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//fprintf(stderr, "extfs: sending error %i (%s)\n", errnum, strerror(errnum));
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return RespondMessage(chl, FSM_RESP_ERROR, &body, sizeof(body));
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}
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bool RespondSuccess(int chl)
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{
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struct fsm_resp_success body;
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return RespondMessage(chl, FSM_RESP_SUCCESS, &body, sizeof(body));
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}
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bool RespondStat(int chl, struct stat* st)
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{
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struct fsm_resp_stat body;
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body.st = *st;
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return RespondMessage(chl, FSM_RESP_STAT, &body, sizeof(body));
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}
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bool RespondSeek(int chl, off_t offset)
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{
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struct fsm_resp_lseek body;
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body.offset = offset;
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return RespondMessage(chl, FSM_RESP_LSEEK, &body, sizeof(body));
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}
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bool RespondRead(int chl, const uint8_t* buf, size_t count)
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{
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struct fsm_resp_read body;
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body.count = count;
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return RespondMessage(chl, FSM_RESP_READ, &body, sizeof(body)) &&
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RespondData(chl, buf, count);
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}
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bool RespondReadlink(int chl, const uint8_t* buf, size_t count)
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{
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struct fsm_resp_readlink body;
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body.targetlen = count;
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return RespondMessage(chl, FSM_RESP_READLINK, &body, sizeof(body)) &&
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RespondData(chl, buf, count);
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}
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bool RespondWrite(int chl, size_t count)
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{
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struct fsm_resp_write body;
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body.count = count;
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return RespondMessage(chl, FSM_RESP_WRITE, &body, sizeof(body));
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}
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bool RespondOpen(int chl, ino_t ino, mode_t type)
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{
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struct fsm_resp_open body;
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body.ino = ino;
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body.type = type;
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return RespondMessage(chl, FSM_RESP_OPEN, &body, sizeof(body));
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}
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bool RespondMakeDir(int chl, ino_t ino)
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{
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struct fsm_resp_mkdir body;
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body.ino = ino;
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return RespondMessage(chl, FSM_RESP_MKDIR, &body, sizeof(body));
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}
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bool RespondReadDir(int chl, struct kernel_dirent* dirent)
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{
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struct fsm_resp_readdirents body;
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body.ino = dirent->d_ino;
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body.type = dirent->d_type;
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body.namelen = dirent->d_namlen;
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return RespondMessage(chl, FSM_RESP_READDIRENTS, &body, sizeof(body)) &&
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RespondData(chl, dirent->d_name, dirent->d_namlen);
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}
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void HandleRefer(int chl, struct fsm_req_refer* msg, Filesystem* fs)
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{
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(void) chl;
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if ( fs->num_inodes <= msg->ino )
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return;
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if ( Inode* inode = fs->GetInode((uint32_t) msg->ino) )
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inode->RemoteRefer();
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}
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void HandleUnref(int chl, struct fsm_req_unref* msg, Filesystem* fs)
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{
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(void) chl;
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if ( fs->num_inodes <= msg->ino )
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return;
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if ( Inode* inode = fs->GetInode((uint32_t) msg->ino) )
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inode->RemoteUnref();
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}
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void HandleSync(int chl, struct fsm_req_sync* msg, Filesystem* fs)
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{
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if ( fs->num_inodes <= msg->ino ) { RespondError(chl, EBADF); return; }
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Inode* inode = fs->GetInode((uint32_t) msg->ino);
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if ( !inode ) { RespondError(chl, errno); return; }
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inode->Sync();
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inode->Unref();
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RespondSuccess(chl);
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}
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void HandleStat(int chl, struct fsm_req_stat* msg, Filesystem* fs)
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{
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if ( fs->num_inodes <= msg->ino ) { RespondError(chl, EBADF); return; }
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Inode* inode = fs->GetInode((uint32_t) msg->ino);
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if ( !inode ) { RespondError(chl, errno); return; }
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struct stat st;
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StatInode(inode, &st);
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inode->Unref();
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RespondStat(chl, &st);
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}
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void HandleChangeMode(int chl, struct fsm_req_chmod* msg, Filesystem* fs)
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{
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if ( fs->num_inodes <= msg->ino ) { RespondError(chl, EBADF); return; }
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Inode* inode = fs->GetInode((uint32_t) msg->ino);
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if ( !inode ) { RespondError(chl, errno); return; }
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uint32_t req_mode = ExtModeFromHostMode(msg->mode);
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uint32_t old_mode = inode->Mode();
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uint32_t new_mode = (old_mode & ~S_SETABLE) | (req_mode & S_SETABLE);
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inode->SetMode(new_mode);
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inode->Unref();
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RespondSuccess(chl);
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}
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void HandleChangeOwner(int chl, struct fsm_req_chown* msg, Filesystem* fs)
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{
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if ( fs->num_inodes <= msg->ino ) { RespondError(chl, EBADF); return; }
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Inode* inode = fs->GetInode((uint32_t) msg->ino);
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if ( !inode ) { RespondError(chl, errno); return; }
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inode->SetUserId((uint32_t) msg->uid);
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inode->SetGroupId((uint32_t) msg->gid);
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inode->Unref();
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RespondSuccess(chl);
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}
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void HandleUTimens(int chl, struct fsm_req_utimens* msg, Filesystem* fs)
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{
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if ( fs->num_inodes <= msg->ino ) { RespondError(chl, EBADF); return; }
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Inode* inode = fs->GetInode((uint32_t) msg->ino);
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if ( !inode ) { RespondError(chl, errno); return; }
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inode->BeginWrite();
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inode->data->i_atime = msg->times[0].tv_sec;
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inode->data->i_mtime = msg->times[1].tv_sec;
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inode->FinishWrite();
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inode->Unref();
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RespondSuccess(chl);
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}
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void HandleTruncate(int chl, struct fsm_req_truncate* msg, Filesystem* fs)
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{
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if( msg->size < 0 ) { RespondError(chl, EINVAL); return; }
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if ( fs->num_inodes <= msg->ino ) { RespondError(chl, EBADF); return; }
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Inode* inode = fs->GetInode((uint32_t) msg->ino);
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if ( !inode ) { RespondError(chl, errno); return; }
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inode->Truncate((uint64_t) msg->size);
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inode->Unref();
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RespondSuccess(chl);
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}
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void HandleSeek(int chl, struct fsm_req_lseek* msg, Filesystem* fs)
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{
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if ( fs->num_inodes <= msg->ino ) { RespondError(chl, EBADF); return; }
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Inode* inode = fs->GetInode((uint32_t) msg->ino);
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if ( !inode ) { RespondError(chl, errno); return; }
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if ( msg->whence == SEEK_SET )
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RespondSeek(chl, msg->offset);
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else if ( msg->whence == SEEK_END )
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{
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off_t inode_size = inode->Size();
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if ( (msg->offset < 0 && inode_size + msg->offset < 0) ||
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(0 <= msg->offset && OFF_MAX - inode_size < msg->offset) )
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RespondError(chl, EOVERFLOW);
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else
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RespondSeek(chl, msg->offset + inode_size);
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}
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else
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RespondError(chl, EINVAL);
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inode->Unref();
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}
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void HandleReadAt(int chl, struct fsm_req_pread* msg, Filesystem* fs)
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{
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if ( fs->num_inodes <= msg->ino ) { RespondError(chl, EBADF); return; }
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Inode* inode = fs->GetInode((uint32_t) msg->ino);
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if ( !inode ) { RespondError(chl, errno); return; }
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uint8_t* buf = (uint8_t*) malloc(msg->count);
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if ( !buf ) { inode->Unref(); RespondError(chl, errno); return; }
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ssize_t amount = inode->ReadAt(buf, msg->count, msg->offset);
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RespondRead(chl, buf, amount);
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inode->Unref();
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free(buf);
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}
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void HandleWriteAt(int chl, struct fsm_req_pread* msg, Filesystem* fs)
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{
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if ( fs->num_inodes <= msg->ino ) { RespondError(chl, EBADF); return; }
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Inode* inode = fs->GetInode((uint32_t) msg->ino);
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if ( !inode ) { RespondError(chl, errno); return; }
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const uint8_t* buf = (const uint8_t*) &msg[1];
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ssize_t amount = inode->WriteAt(buf, msg->count, msg->offset);
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RespondWrite(chl, amount);
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inode->Unref();
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}
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void HandleOpen(int chl, struct fsm_req_open* msg, Filesystem* fs)
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{
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if ( fs->num_inodes <= msg->dirino ) { RespondError(chl, EBADF); return; }
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Inode* inode = fs->GetInode((uint32_t) msg->dirino);
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if ( !inode ) { RespondError(chl, errno); return; }
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char* pathraw = (char*) &(msg[1]);
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char* path = (char*) malloc(msg->namelen+1);
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if ( !path )
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{
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RespondError(chl, errno);
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inode->Unref();
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return;
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}
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memcpy(path, pathraw, msg->namelen);
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path[msg->namelen] = '\0';
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Inode* result = inode->Open(path, msg->flags, ExtModeFromHostMode(msg->mode));
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free(path);
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inode->Unref();
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if ( !result ) { RespondError(chl, errno); return; }
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RespondOpen(chl, result->inode_id, result->Mode() & S_IFMT);
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result->Unref();
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}
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void HandleMakeDir(int chl, struct fsm_req_open* msg, Filesystem* fs)
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{
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if ( fs->num_inodes <= msg->dirino ) { RespondError(chl, EBADF); return; }
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Inode* inode = fs->GetInode((uint32_t) msg->dirino);
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if ( !inode ) { RespondError(chl, errno); return; }
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char* pathraw = (char*) &(msg[1]);
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char* path = (char*) malloc(msg->namelen+1);
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if ( !path )
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{
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RespondError(chl, errno);
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inode->Unref();
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return;
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}
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memcpy(path, pathraw, msg->namelen);
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path[msg->namelen] = '\0';
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Inode* result = inode->CreateDirectory(path, ExtModeFromHostMode(msg->mode));
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free(path);
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inode->Unref();
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if ( !result ) { RespondError(chl, errno); return; }
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RespondMakeDir(chl, result->inode_id);
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result->Unref();
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}
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void HandleReadDir(int chl, struct fsm_req_readdirents* msg, Filesystem* fs)
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{
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if ( fs->num_inodes <= msg->ino ) { RespondError(chl, EBADF); return; }
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Inode* inode = fs->GetInode((uint32_t) msg->ino);
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if ( !inode ) { RespondError(chl, errno); return; }
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if ( !S_ISDIR(inode->Mode()) )
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{
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inode->Unref();
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RespondError(chl, ENOTDIR);
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return;
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}
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union
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{
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struct kernel_dirent kernel_entry;
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uint8_t padding[sizeof(struct kernel_dirent) + 256];
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};
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memset(&kernel_entry, 0, sizeof(kernel_entry));
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uint64_t file_size = inode->Size();
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uint64_t offset = 0;
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Block* block = NULL;
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uint64_t block_id = 0;
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while ( offset < file_size )
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{
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uint64_t entry_block_id = offset / fs->block_size;
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uint64_t entry_block_offset = offset % fs->block_size;
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if ( block && block_id != entry_block_id )
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block->Unref(),
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block = NULL;
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if ( !block && !(block = inode->GetBlock(block_id = entry_block_id)) )
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{
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inode->Unref();
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RespondError(chl, errno);
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return;
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}
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const uint8_t* block_data = block->block_data + entry_block_offset;
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const struct ext_dirent* entry = (const struct ext_dirent*) block_data;
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if ( entry->inode && entry->name_len && !(msg->rec_num--) )
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{
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kernel_entry.d_reclen = sizeof(kernel_entry) + entry->name_len;
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kernel_entry.d_nextoff = 0;
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kernel_entry.d_ino = entry->inode;
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kernel_entry.d_dev = 0;
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kernel_entry.d_type = 0; // TODO: Support this!
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kernel_entry.d_namlen = entry->name_len;
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memcpy(kernel_entry.d_name, entry->name, entry->name_len);
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size_t dname_offset = offsetof(struct kernel_dirent, d_name);
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padding[dname_offset + kernel_entry.d_namlen] = '\0';
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block->Unref();
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inode->Unref();
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RespondReadDir(chl, &kernel_entry);
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return;
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}
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offset += entry->reclen;
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}
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if ( block )
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block->Unref();
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kernel_entry.d_reclen = sizeof(kernel_entry);
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RespondReadDir(chl, &kernel_entry);
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}
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|
||||
void HandleIsATTY(int chl, struct fsm_req_isatty* msg, Filesystem* fs)
|
||||
{
|
||||
if ( fs->num_inodes <= msg->ino ) { RespondError(chl, EBADF); return; }
|
||||
Inode* inode = fs->GetInode((uint32_t) msg->ino);
|
||||
if ( !inode ) { RespondError(chl, errno); return; }
|
||||
RespondError(chl, ENOTTY);
|
||||
inode->Unref();
|
||||
}
|
||||
|
||||
void HandleUnlink(int chl, struct fsm_req_unlink* msg, Filesystem* fs)
|
||||
{
|
||||
if ( fs->num_inodes <= msg->dirino ) { RespondError(chl, EBADF); return; }
|
||||
Inode* inode = fs->GetInode((uint32_t) msg->dirino);
|
||||
if ( !inode ) { RespondError(chl, errno); return; }
|
||||
|
||||
char* pathraw = (char*) &(msg[1]);
|
||||
char* path = (char*) malloc(msg->namelen+1);
|
||||
if ( !path )
|
||||
{
|
||||
RespondError(chl, errno);
|
||||
inode->Unref();
|
||||
return;
|
||||
}
|
||||
memcpy(path, pathraw, msg->namelen);
|
||||
path[msg->namelen] = '\0';
|
||||
|
||||
Inode* result = inode->Unlink(path, false);
|
||||
free(path);
|
||||
inode->Unref();
|
||||
|
||||
if ( !result ) { RespondError(chl, errno); return; }
|
||||
|
||||
result->Unref();
|
||||
|
||||
RespondSuccess(chl);
|
||||
}
|
||||
|
||||
void HandleRemoveDir(int chl, struct fsm_req_unlink* msg, Filesystem* fs)
|
||||
{
|
||||
if ( fs->num_inodes <= msg->dirino ) { RespondError(chl, EBADF); return; }
|
||||
Inode* inode = fs->GetInode((uint32_t) msg->dirino);
|
||||
if ( !inode ) { RespondError(chl, errno); return; }
|
||||
|
||||
char* pathraw = (char*) &(msg[1]);
|
||||
char* path = (char*) malloc(msg->namelen+1);
|
||||
if ( !path )
|
||||
{
|
||||
RespondError(chl, errno);
|
||||
inode->Unref();
|
||||
return;
|
||||
}
|
||||
memcpy(path, pathraw, msg->namelen);
|
||||
path[msg->namelen] = '\0';
|
||||
|
||||
if ( inode->RemoveDirectory(path) )
|
||||
RespondSuccess(chl);
|
||||
else
|
||||
RespondError(chl, errno);
|
||||
|
||||
free(path);
|
||||
inode->Unref();
|
||||
}
|
||||
|
||||
void HandleLink(int chl, struct fsm_req_link* msg, Filesystem* fs)
|
||||
{
|
||||
if ( fs->num_inodes <= msg->dirino ) { RespondError(chl, EBADF); return; }
|
||||
if ( fs->num_inodes <= msg->linkino ) { RespondError(chl, EBADF); return; }
|
||||
Inode* inode = fs->GetInode((uint32_t) msg->dirino);
|
||||
if ( !inode ) { RespondError(chl, errno); return; }
|
||||
Inode* dest = fs->GetInode((uint32_t) msg->linkino);
|
||||
if ( !dest ) { inode->Unref(); RespondError(chl, errno); return; }
|
||||
|
||||
char* pathraw = (char*) &(msg[1]);
|
||||
char* path = (char*) malloc(msg->namelen+1);
|
||||
if ( !path )
|
||||
{
|
||||
RespondError(chl, errno);
|
||||
inode->Unref();
|
||||
return;
|
||||
}
|
||||
memcpy(path, pathraw, msg->namelen);
|
||||
path[msg->namelen] = '\0';
|
||||
|
||||
if ( inode->Link(path, dest, false) )
|
||||
RespondSuccess(chl);
|
||||
else
|
||||
RespondError(chl, errno);
|
||||
|
||||
free(path);
|
||||
dest->Unref();
|
||||
inode->Unref();
|
||||
}
|
||||
|
||||
void HandleSymlink(int chl, struct fsm_req_symlink* msg, Filesystem* fs)
|
||||
{
|
||||
if ( fs->num_inodes <= msg->dirino ) { RespondError(chl, EBADF); return; }
|
||||
Inode* inode = fs->GetInode((uint32_t) msg->dirino);
|
||||
if ( !inode ) { RespondError(chl, errno); return; }
|
||||
|
||||
char* dest_raw = (char*) &(msg[1]);
|
||||
char* dest = (char*) malloc(msg->targetlen + 1);
|
||||
if ( !dest )
|
||||
{
|
||||
RespondError(chl, errno);
|
||||
inode->Unref();
|
||||
return;
|
||||
}
|
||||
memcpy(dest, dest_raw, msg->targetlen);
|
||||
dest[msg->targetlen] = '\0';
|
||||
|
||||
char* path_raw = (char*) dest_raw + msg->targetlen;
|
||||
char* path = (char*) malloc(msg->namelen + 1);
|
||||
if ( !path )
|
||||
{
|
||||
RespondError(chl, errno);
|
||||
inode->Unref();
|
||||
return;
|
||||
}
|
||||
memcpy(path, path_raw, msg->namelen);
|
||||
path[msg->namelen] = '\0';
|
||||
|
||||
if ( inode->Symlink(path, dest) )
|
||||
RespondSuccess(chl);
|
||||
else
|
||||
RespondError(chl, errno);
|
||||
|
||||
free(path);
|
||||
free(dest);
|
||||
inode->Unref();
|
||||
}
|
||||
|
||||
void HandleReadlink(int chl, struct fsm_req_readlink* msg, Filesystem* fs)
|
||||
{
|
||||
if ( fs->num_inodes <= msg->ino ) { RespondError(chl, EBADF); return; }
|
||||
Inode* inode = fs->GetInode((uint32_t) msg->ino);
|
||||
if ( !inode ) { RespondError(chl, errno); return; }
|
||||
if ( !EXT2_S_ISLNK(inode->Mode()) ) { inode->Unref(); RespondError(chl, EINVAL); return; }
|
||||
size_t count = inode->Size();
|
||||
uint8_t* buf = (uint8_t*) malloc(count);
|
||||
if ( !buf ) { inode->Unref(); RespondError(chl, errno); return; }
|
||||
ssize_t amount = inode->ReadAt(buf, count, 0);
|
||||
RespondReadlink(chl, buf, amount);
|
||||
inode->Unref();
|
||||
free(buf);
|
||||
}
|
||||
|
||||
void HandleRename(int chl, struct fsm_req_rename* msg, Filesystem* fs)
|
||||
{
|
||||
if ( fs->num_inodes <= msg->olddirino ) { RespondError(chl, EBADF); return; }
|
||||
if ( fs->num_inodes <= msg->newdirino ) { RespondError(chl, EBADF); return; }
|
||||
|
||||
char* pathraw = (char*) &(msg[1]);
|
||||
char* path = (char*) malloc(msg->oldnamelen+1 + msg->newnamelen+1);
|
||||
if ( !path ) { RespondError(chl, errno); return; }
|
||||
memcpy(path, pathraw, msg->oldnamelen);
|
||||
path[msg->oldnamelen] = '\0';
|
||||
memcpy(path + msg->oldnamelen + 1, pathraw + msg->oldnamelen, msg->newnamelen);
|
||||
path[msg->oldnamelen + 1 + msg->newnamelen] = '\0';
|
||||
|
||||
const char* oldname = path;
|
||||
const char* newname = path + msg->oldnamelen + 1;
|
||||
|
||||
Inode* olddir = fs->GetInode((uint32_t) msg->olddirino);
|
||||
if ( !olddir ) { free(path); RespondError(chl, errno); return; }
|
||||
Inode* newdir = fs->GetInode((uint32_t) msg->newdirino);
|
||||
if ( !newdir ) { olddir->Unref(); free(path); RespondError(chl, errno); return; }
|
||||
|
||||
if ( newdir->Rename(olddir, oldname, newname) )
|
||||
RespondSuccess(chl);
|
||||
else
|
||||
RespondError(chl, errno);
|
||||
|
||||
newdir->Unref();
|
||||
olddir->Unref();
|
||||
free(path);
|
||||
}
|
||||
|
||||
void HandleIncomingMessage(int chl, struct fsm_msg_header* hdr, Filesystem* fs)
|
||||
{
|
||||
typedef void (*handler_t)(int, void*, Filesystem*);
|
||||
handler_t handlers[FSM_MSG_NUM] = { NULL };
|
||||
handlers[FSM_REQ_SYNC] = (handler_t) HandleSync;
|
||||
handlers[FSM_REQ_STAT] = (handler_t) HandleStat;
|
||||
handlers[FSM_REQ_CHMOD] = (handler_t) HandleChangeMode;
|
||||
handlers[FSM_REQ_CHOWN] = (handler_t) HandleChangeOwner;
|
||||
handlers[FSM_REQ_TRUNCATE] = (handler_t) HandleTruncate;
|
||||
handlers[FSM_REQ_LSEEK] = (handler_t) HandleSeek;
|
||||
handlers[FSM_REQ_PREAD] = (handler_t) HandleReadAt;
|
||||
handlers[FSM_REQ_OPEN] = (handler_t) HandleOpen;
|
||||
handlers[FSM_REQ_READDIRENTS] = (handler_t) HandleReadDir;
|
||||
handlers[FSM_REQ_PWRITE] = (handler_t) HandleWriteAt;
|
||||
handlers[FSM_REQ_ISATTY] = (handler_t) HandleIsATTY;
|
||||
handlers[FSM_REQ_UTIMENS] = (handler_t) HandleUTimens;
|
||||
handlers[FSM_REQ_MKDIR] = (handler_t) HandleMakeDir;
|
||||
handlers[FSM_REQ_RMDIR] = (handler_t) HandleRemoveDir;
|
||||
handlers[FSM_REQ_UNLINK] = (handler_t) HandleUnlink;
|
||||
handlers[FSM_REQ_LINK] = (handler_t) HandleLink;
|
||||
handlers[FSM_REQ_SYMLINK] = (handler_t) HandleSymlink;
|
||||
handlers[FSM_REQ_READLINK] = (handler_t) HandleReadlink;
|
||||
handlers[FSM_REQ_RENAME] = (handler_t) HandleRename;
|
||||
handlers[FSM_REQ_REFER] = (handler_t) HandleRefer;
|
||||
handlers[FSM_REQ_UNREF] = (handler_t) HandleUnref;
|
||||
if ( FSM_MSG_NUM <= hdr->msgtype || !handlers[hdr->msgtype] )
|
||||
{
|
||||
fprintf(stderr, "extfs: message type %zu not supported!\n", hdr->msgtype);
|
||||
RespondError(chl, ENOTSUP);
|
||||
return;
|
||||
}
|
||||
uint8_t* body = (uint8_t*) malloc(hdr->msgsize);
|
||||
if ( !body )
|
||||
{
|
||||
fprintf(stderr, "extfs: message of type %zu too large: %zu bytes\n", hdr->msgtype, hdr->msgsize);
|
||||
RespondError(chl, errno);
|
||||
return;
|
||||
}
|
||||
size_t amount = readall(chl, body, hdr->msgsize);
|
||||
if ( amount < hdr->msgsize )
|
||||
{
|
||||
fprintf(stderr, "extfs: incomplete message of type %zu: got %zi of %zu bytes\n", hdr->msgtype, amount, hdr->msgsize);
|
||||
RespondError(chl, errno);
|
||||
free(body);
|
||||
return;
|
||||
}
|
||||
handlers[hdr->msgtype](chl, body, fs);
|
||||
free(body);
|
||||
}
|
||||
static volatile bool should_terminate = false;
|
||||
|
||||
void TerminationHandler(int)
|
||||
{
|
||||
should_terminate = true;
|
||||
}
|
||||
|
||||
int fsmarshall_main(const char* argv0,
|
||||
const char* mount_path,
|
||||
bool foreground,
|
||||
Filesystem* fs,
|
||||
Device* dev)
|
||||
{
|
||||
// Stat the root inode.
|
||||
struct stat root_inode_st;
|
||||
Inode* root_inode = fs->GetInode((uint32_t) EXT2_ROOT_INO);
|
||||
if ( !root_inode )
|
||||
error(1, errno, "GetInode(%u)", EXT2_ROOT_INO);
|
||||
StatInode(root_inode, &root_inode_st);
|
||||
root_inode->Unref();
|
||||
|
||||
// Create a filesystem server connected to the kernel that we'll listen on.
|
||||
int serverfd = fsm_mountat(AT_FDCWD, mount_path, &root_inode_st, 0);
|
||||
if ( serverfd < 0 )
|
||||
error(1, errno, "%s", mount_path);
|
||||
|
||||
// Make sure the server isn't unexpectedly killed and data is lost.
|
||||
signal(SIGINT, TerminationHandler);
|
||||
signal(SIGTERM, TerminationHandler);
|
||||
signal(SIGQUIT, TerminationHandler);
|
||||
|
||||
// Become a background process in its own process group by default.
|
||||
if ( !foreground )
|
||||
{
|
||||
pid_t child_pid = fork();
|
||||
if ( child_pid < 0 )
|
||||
error(1, errno, "fork");
|
||||
if ( child_pid )
|
||||
exit(0);
|
||||
setpgid(0, 0);
|
||||
}
|
||||
|
||||
// Listen for filesystem messages and sync the filesystem every few seconds.
|
||||
struct timespec last_sync_at;
|
||||
clock_gettime(CLOCK_MONOTONIC, &last_sync_at);
|
||||
int channel;
|
||||
while ( 0 <= (channel = accept(serverfd, NULL, NULL)) )
|
||||
{
|
||||
if ( should_terminate )
|
||||
break;
|
||||
struct fsm_msg_header hdr;
|
||||
size_t amount;
|
||||
if ( (amount = readall(channel, &hdr, sizeof(hdr))) != sizeof(hdr) )
|
||||
{
|
||||
error(0, errno, "incomplete header: got %zi of %zu bytes", amount, sizeof(hdr));
|
||||
errno = 0;
|
||||
continue;
|
||||
}
|
||||
HandleIncomingMessage(channel, &hdr, fs);
|
||||
close(channel);
|
||||
|
||||
struct timespec now;
|
||||
clock_gettime(CLOCK_MONOTONIC, &now);
|
||||
|
||||
if ( dev->write && 5 <= timespec_sub(now, last_sync_at).tv_sec )
|
||||
{
|
||||
fs->Sync();
|
||||
last_sync_at = now;
|
||||
}
|
||||
}
|
||||
|
||||
// Sync the filesystem before shutting down.
|
||||
if ( dev->write )
|
||||
{
|
||||
fprintf(stderr, "%s: filesystem server shutting down, syncing...", argv0);
|
||||
fflush(stderr);
|
||||
fs->Sync();
|
||||
fprintf(stderr, " done.\n");
|
||||
}
|
||||
|
||||
close(serverfd);
|
||||
|
||||
delete fs;
|
||||
delete dev;
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
#endif
|
||||
|
|
@ -0,0 +1,33 @@
|
|||
/*******************************************************************************
|
||||
|
||||
Copyright(C) Jonas 'Sortie' Termansen 2015.
|
||||
|
||||
This program is free software: you can redistribute it and/or modify it
|
||||
under the terms of the GNU General Public License as published by the Free
|
||||
Software Foundation, either version 3 of the License, or (at your option)
|
||||
any later version.
|
||||
|
||||
This program is distributed in the hope that it will be useful, but WITHOUT
|
||||
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
||||
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
||||
more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License along with
|
||||
this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
fsmarshall.h
|
||||
Sortix fsmarshall frontend.
|
||||
|
||||
*******************************************************************************/
|
||||
#ifndef FSMARSHALL_H
|
||||
#define FSMARSHALL_H
|
||||
|
||||
class Device;
|
||||
class Filesystem;
|
||||
|
||||
int fsmarshall_main(const char* argv0,
|
||||
const char* mount_path,
|
||||
bool foreground,
|
||||
Filesystem* fs,
|
||||
Device* dev);
|
||||
#endif
|
||||
|
|
@ -0,0 +1,586 @@
|
|||
/*******************************************************************************
|
||||
|
||||
Copyright(C) Jonas 'Sortie' Termansen 2013, 2014, 2015.
|
||||
|
||||
This program is free software: you can redistribute it and/or modify it
|
||||
under the terms of the GNU General Public License as published by the Free
|
||||
Software Foundation, either version 3 of the License, or (at your option)
|
||||
any later version.
|
||||
|
||||
This program is distributed in the hope that it will be useful, but WITHOUT
|
||||
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
||||
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
||||
more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License along with
|
||||
this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
fuse.cpp
|
||||
FUSE frontend.
|
||||
|
||||
*******************************************************************************/
|
||||
|
||||
#if !defined(__sortix__)
|
||||
|
||||
#include <sys/stat.h>
|
||||
#include <sys/types.h>
|
||||
|
||||
#include <assert.h>
|
||||
#include <errno.h>
|
||||
#include <limits.h>
|
||||
#include <stddef.h>
|
||||
#include <stdint.h>
|
||||
#include <string.h>
|
||||
|
||||
#define FUSE_USE_VERSION 26
|
||||
#include <fuse.h>
|
||||
|
||||
#include "ext-constants.h"
|
||||
#include "ext-structs.h"
|
||||
|
||||
#include "blockgroup.h"
|
||||
#include "block.h"
|
||||
#include "device.h"
|
||||
#include "extfs.h"
|
||||
#include "filesystem.h"
|
||||
#include "fuse.h"
|
||||
#include "inode.h"
|
||||
|
||||
struct ext2_fuse_ctx
|
||||
{
|
||||
Device* dev;
|
||||
Filesystem* fs;
|
||||
};
|
||||
|
||||
#ifndef S_SETABLE
|
||||
#define S_SETABLE 02777
|
||||
#endif
|
||||
|
||||
#define FUSE_FS (((struct ext2_fuse_ctx*) (fuse_get_context()->private_data))->fs)
|
||||
|
||||
void* ext2_fuse_init(struct fuse_conn_info* /*conn*/)
|
||||
{
|
||||
return fuse_get_context()->private_data;
|
||||
}
|
||||
|
||||
void ext2_fuse_destroy(void* fs_private)
|
||||
{
|
||||
struct ext2_fuse_ctx* ext2_fuse_ctx = (struct ext2_fuse_ctx*) fs_private;
|
||||
ext2_fuse_ctx->fs->Sync();
|
||||
ext2_fuse_ctx->dev->Sync();
|
||||
delete ext2_fuse_ctx->fs; ext2_fuse_ctx->fs = NULL;
|
||||
delete ext2_fuse_ctx->dev; ext2_fuse_ctx->dev = NULL;
|
||||
}
|
||||
|
||||
Inode* ext2_fuse_resolve_path(const char* path)
|
||||
{
|
||||
Filesystem* fs = FUSE_FS;
|
||||
Inode* inode = fs->GetInode(EXT2_ROOT_INO);
|
||||
assert(inode);
|
||||
while ( path[0] )
|
||||
{
|
||||
if ( *path == '/' )
|
||||
{
|
||||
if ( !EXT2_S_ISDIR(inode->Mode()) )
|
||||
return errno = ENOTDIR, (Inode*) NULL;
|
||||
path++;
|
||||
continue;
|
||||
}
|
||||
size_t elem_len = strcspn(path, "/");
|
||||
char* elem = new char[elem_len+1];
|
||||
memcpy(elem, path, elem_len);
|
||||
elem[elem_len] = '\0';
|
||||
path += elem_len;
|
||||
Inode* next = inode->Open(elem, O_RDONLY, 0);
|
||||
delete[] elem;
|
||||
inode->Unref();
|
||||
if ( !next )
|
||||
return NULL;
|
||||
inode = next;
|
||||
}
|
||||
return inode;
|
||||
}
|
||||
|
||||
// Assumes that the path doesn't end with / unless it's the root directory.
|
||||
Inode* ext2_fuse_parent_dir(const char** path_ptr)
|
||||
{
|
||||
const char* path = *path_ptr;
|
||||
Filesystem* fs = FUSE_FS;
|
||||
Inode* inode = fs->GetInode(EXT2_ROOT_INO);
|
||||
assert(inode);
|
||||
while ( strchr(path, '/') )
|
||||
{
|
||||
if ( *path == '/' )
|
||||
{
|
||||
if ( !EXT2_S_ISDIR(inode->Mode()) )
|
||||
return errno = ENOTDIR, (Inode*) NULL;
|
||||
path++;
|
||||
continue;
|
||||
}
|
||||
size_t elem_len = strcspn(path, "/");
|
||||
char* elem = new char[elem_len+1];
|
||||
memcpy(elem, path, elem_len);
|
||||
elem[elem_len] = '\0';
|
||||
path += elem_len;
|
||||
Inode* next = inode->Open(elem, O_RDONLY, 0);
|
||||
delete[] elem;
|
||||
inode->Unref();
|
||||
if ( !next )
|
||||
return NULL;
|
||||
inode = next;
|
||||
}
|
||||
*path_ptr = *path ? path : ".";
|
||||
assert(!strchr(*path_ptr, '/'));
|
||||
return inode;
|
||||
}
|
||||
|
||||
int ext2_fuse_getattr(const char* path, struct stat* st)
|
||||
{
|
||||
Inode* inode = ext2_fuse_resolve_path(path);
|
||||
if ( !inode )
|
||||
return -errno;
|
||||
StatInode(inode, st);
|
||||
inode->Unref();
|
||||
return 0;
|
||||
}
|
||||
|
||||
int ext2_fuse_fgetattr(const char* /*path*/, struct stat* st,
|
||||
struct fuse_file_info* fi)
|
||||
{
|
||||
Filesystem* fs = FUSE_FS;
|
||||
Inode* inode = fs->GetInode((uint32_t) fi->fh);
|
||||
if ( !inode )
|
||||
return -errno;
|
||||
StatInode(inode, st);
|
||||
inode->Unref();
|
||||
return 0;
|
||||
}
|
||||
|
||||
int ext2_fuse_readlink(const char* path, char* buf, size_t bufsize)
|
||||
{
|
||||
Inode* inode = ext2_fuse_resolve_path(path);
|
||||
if ( !inode )
|
||||
return -errno;
|
||||
if ( !EXT2_S_ISLNK(inode->Mode()) )
|
||||
return inode->Unref(), -(errno = EINVAL);
|
||||
if ( !bufsize )
|
||||
return inode->Unref(), -(errno = EINVAL);
|
||||
ssize_t amount = inode->ReadAt((uint8_t*) buf, bufsize, 0);
|
||||
if ( amount < 0 )
|
||||
return inode->Unref(), -errno;
|
||||
buf[(size_t) amount < bufsize ? (size_t) bufsize : bufsize - 1] = '\0';
|
||||
inode->Unref();
|
||||
return 0;
|
||||
}
|
||||
|
||||
int ext2_fuse_mknod(const char* path, mode_t mode, dev_t dev)
|
||||
{
|
||||
(void) path;
|
||||
(void) mode;
|
||||
(void) dev;
|
||||
return -(errno = ENOSYS);
|
||||
}
|
||||
|
||||
int ext2_fuse_mkdir(const char* path, mode_t mode)
|
||||
{
|
||||
Inode* inode = ext2_fuse_parent_dir(&path);
|
||||
if ( !inode )
|
||||
return -errno;
|
||||
Inode* newdir = inode->CreateDirectory(path, ExtModeFromHostMode(mode));
|
||||
inode->Unref();
|
||||
if ( !newdir )
|
||||
return -errno;
|
||||
newdir->Unref();
|
||||
return 0;
|
||||
}
|
||||
|
||||
int ext2_fuse_unlink(const char* path)
|
||||
{
|
||||
Inode* inode = ext2_fuse_parent_dir(&path);
|
||||
if ( !inode )
|
||||
return -errno;
|
||||
Inode* result = inode->Unlink(path, false);
|
||||
inode->Unref();
|
||||
if ( !result )
|
||||
return -errno;
|
||||
result->Unref();
|
||||
return 0;
|
||||
}
|
||||
|
||||
int ext2_fuse_rmdir(const char* path)
|
||||
{
|
||||
Inode* inode = ext2_fuse_parent_dir(&path);
|
||||
if ( !inode )
|
||||
return -errno;
|
||||
bool success = inode->RemoveDirectory(path);
|
||||
inode->Unref();
|
||||
return success ? 0 : -errno;
|
||||
}
|
||||
|
||||
int ext2_fuse_symlink(const char* oldname, const char* newname)
|
||||
{
|
||||
Inode* newdir = ext2_fuse_parent_dir(&newname);
|
||||
if ( !newdir )
|
||||
return -errno;
|
||||
bool success = newdir->Symlink(newname, oldname);
|
||||
newdir->Unref();
|
||||
return success ? 0 : -errno;
|
||||
}
|
||||
|
||||
int ext2_fuse_rename(const char* oldname, const char* newname)
|
||||
{
|
||||
Inode* olddir = ext2_fuse_parent_dir(&oldname);
|
||||
if ( !olddir )
|
||||
return -errno;
|
||||
Inode* newdir = ext2_fuse_parent_dir(&newname);
|
||||
if ( !newdir )
|
||||
return olddir->Unref(), -errno;
|
||||
bool success = newdir->Rename(olddir, oldname, newname);
|
||||
newdir->Unref();
|
||||
olddir->Unref();
|
||||
return success ? 0 : -errno;
|
||||
}
|
||||
|
||||
int ext2_fuse_link(const char* oldname, const char* newname)
|
||||
{
|
||||
Inode* inode = ext2_fuse_resolve_path(oldname);
|
||||
if ( !inode )
|
||||
return -errno;
|
||||
Inode* newdir = ext2_fuse_parent_dir(&newname);
|
||||
if ( !newdir )
|
||||
return inode->Unref(), -errno;
|
||||
bool success = inode->Link(newname, inode, false);
|
||||
newdir->Unref();
|
||||
inode->Unref();
|
||||
return success ? 0 : -errno;
|
||||
}
|
||||
|
||||
int ext2_fuse_chmod(const char* path, mode_t mode)
|
||||
{
|
||||
Inode* inode = ext2_fuse_resolve_path(path);
|
||||
if ( !inode )
|
||||
return -errno;
|
||||
uint32_t req_mode = ExtModeFromHostMode(mode);
|
||||
uint32_t old_mode = inode->Mode();
|
||||
uint32_t new_mode = (old_mode & ~S_SETABLE) | (req_mode & S_SETABLE);
|
||||
inode->SetMode(new_mode);
|
||||
inode->Unref();
|
||||
return 0;
|
||||
}
|
||||
|
||||
int ext2_fuse_chown(const char* path, uid_t owner, gid_t group)
|
||||
{
|
||||
Inode* inode = ext2_fuse_resolve_path(path);
|
||||
if ( !inode )
|
||||
return -errno;
|
||||
inode->SetUserId((uint32_t) owner);
|
||||
inode->SetGroupId((uint32_t) group);
|
||||
inode->Unref();
|
||||
return 0;
|
||||
}
|
||||
|
||||
int ext2_fuse_truncate(const char* path, off_t size)
|
||||
{
|
||||
Inode* inode = ext2_fuse_resolve_path(path);
|
||||
if ( !inode )
|
||||
return -errno;
|
||||
inode->Truncate((uint64_t) size);
|
||||
inode->Unref();
|
||||
return 0;
|
||||
}
|
||||
|
||||
int ext2_fuse_ftruncate(const char* /*path*/, off_t size,
|
||||
struct fuse_file_info* fi)
|
||||
{
|
||||
Filesystem* fs = FUSE_FS;
|
||||
Inode* inode = fs->GetInode((uint32_t) fi->fh);
|
||||
if ( !inode )
|
||||
return -errno;
|
||||
inode->Truncate((uint64_t) size);
|
||||
inode->Unref();
|
||||
return 0;
|
||||
}
|
||||
|
||||
int ext2_fuse_open(const char* path, struct fuse_file_info* fi)
|
||||
{
|
||||
int flags = fi->flags;
|
||||
Inode* dir = ext2_fuse_parent_dir(&path);
|
||||
if ( !dir )
|
||||
return -errno;
|
||||
Inode* result = dir->Open(path, flags, 0);
|
||||
dir->Unref();
|
||||
if ( !result )
|
||||
return -errno;
|
||||
fi->fh = (uint64_t) result->inode_id;
|
||||
fi->keep_cache = 1;
|
||||
result->RemoteRefer();
|
||||
result->Unref();
|
||||
return 0;
|
||||
}
|
||||
|
||||
int ext2_fuse_access(const char* path, int mode)
|
||||
{
|
||||
Inode* dir = ext2_fuse_parent_dir(&path);
|
||||
if ( !dir )
|
||||
return -errno;
|
||||
Inode* result = dir->Open(path, O_RDONLY, 0);
|
||||
dir->Unref();
|
||||
if ( !result )
|
||||
return -errno;
|
||||
(void) mode;
|
||||
result->Unref();
|
||||
return 0;
|
||||
}
|
||||
|
||||
int ext2_fuse_create(const char* path, mode_t mode, struct fuse_file_info* fi)
|
||||
{
|
||||
int flags = fi->flags | O_CREAT;
|
||||
Inode* inode = ext2_fuse_parent_dir(&path);
|
||||
if ( !inode )
|
||||
return -errno;
|
||||
Inode* result = inode->Open(path, flags, ExtModeFromHostMode(mode));
|
||||
inode->Unref();
|
||||
if ( !result )
|
||||
return -errno;
|
||||
fi->fh = (uint64_t) result->inode_id;
|
||||
fi->keep_cache = 1;
|
||||
result->Unref();
|
||||
return 0;
|
||||
}
|
||||
|
||||
int ext2_fuse_opendir(const char* path, struct fuse_file_info* fi)
|
||||
{
|
||||
return ext2_fuse_open(path, fi);
|
||||
}
|
||||
|
||||
int ext2_fuse_read(const char* /*path*/, char* buf, size_t count, off_t offset,
|
||||
struct fuse_file_info* fi)
|
||||
{
|
||||
Filesystem* fs = FUSE_FS;
|
||||
if ( INT_MAX < count )
|
||||
count = INT_MAX;
|
||||
Inode* inode = fs->GetInode((uint32_t) fi->fh);
|
||||
if ( !inode )
|
||||
return -errno;
|
||||
ssize_t result = inode->ReadAt((uint8_t*) buf, count, offset);
|
||||
inode->Unref();
|
||||
return 0 <= result ? (int) result : -errno;
|
||||
}
|
||||
|
||||
int ext2_fuse_write(const char* /*path*/, const char* buf, size_t count,
|
||||
off_t offset, struct fuse_file_info* fi)
|
||||
{
|
||||
Filesystem* fs = FUSE_FS;
|
||||
if ( INT_MAX < count )
|
||||
count = INT_MAX;
|
||||
Inode* inode = fs->GetInode((uint32_t) fi->fh);
|
||||
if ( !inode )
|
||||
return -errno;
|
||||
ssize_t result = inode->WriteAt((const uint8_t*) buf, count, offset);
|
||||
inode->Unref();
|
||||
return 0 <= result ? (int) result : -errno;
|
||||
}
|
||||
|
||||
int ext2_fuse_statfs(const char* /*path*/, struct statvfs* stvfs)
|
||||
{
|
||||
(void) stvfs;
|
||||
return errno = -ENOSYS, -1;
|
||||
}
|
||||
|
||||
int ext2_fuse_flush(const char* /*path*/, struct fuse_file_info* fi)
|
||||
{
|
||||
Filesystem* fs = FUSE_FS;
|
||||
Inode* inode = fs->GetInode((uint32_t) fi->fh);
|
||||
if ( !inode )
|
||||
return -errno;
|
||||
inode->Sync();
|
||||
inode->Unref();
|
||||
return 0;
|
||||
}
|
||||
|
||||
int ext2_fuse_release(const char* /*path*/, struct fuse_file_info* fi)
|
||||
{
|
||||
Filesystem* fs = FUSE_FS;
|
||||
Inode* inode = fs->GetInode((uint32_t) fi->fh);
|
||||
if ( !inode )
|
||||
return -errno;
|
||||
inode->RemoteUnref();
|
||||
inode->Unref();
|
||||
return 0;
|
||||
}
|
||||
|
||||
int ext2_fuse_releasedir(const char* path, struct fuse_file_info* fi)
|
||||
{
|
||||
return ext2_fuse_release(path, fi);
|
||||
}
|
||||
|
||||
int ext2_fuse_fsync(const char* /*path*/, int data, struct fuse_file_info* fi)
|
||||
{
|
||||
(void) data;
|
||||
Filesystem* fs = FUSE_FS;
|
||||
Inode* inode = fs->GetInode((uint32_t) fi->fh);
|
||||
if ( !inode )
|
||||
return -errno;
|
||||
inode->Sync();
|
||||
inode->Unref();
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*int ext2_fuse_syncdir(const char* path, int data, struct fuse_file_info* fi)
|
||||
{
|
||||
return ext2_fuse_sync(path, data, fi);
|
||||
}*/
|
||||
|
||||
/*int ext2_fuse_setxattr(const char *, const char *, const char *, size_t, int)
|
||||
{
|
||||
return -(errno = ENOSYS);
|
||||
}*/
|
||||
|
||||
/*int ext2_fuse_getxattr(const char *, const char *, char *, size_t)
|
||||
{
|
||||
return -(errno = ENOSYS);
|
||||
}*/
|
||||
|
||||
/*int ext2_fuse_listxattr(const char *, char *, size_t)
|
||||
{
|
||||
return -(errno = ENOSYS);
|
||||
}*/
|
||||
|
||||
/*int ext2_fuse_removexattr(const char *, const char *)
|
||||
{
|
||||
return -(errno = ENOSYS);
|
||||
}*/
|
||||
|
||||
int ext2_fuse_readdir(const char* /*path*/, void* buf, fuse_fill_dir_t filler,
|
||||
off_t rec_num, struct fuse_file_info* fi)
|
||||
{
|
||||
Filesystem* fs = FUSE_FS;
|
||||
Inode* inode = fs->GetInode((uint32_t) fi->fh);
|
||||
if ( !inode )
|
||||
return -errno;
|
||||
if ( !S_ISDIR(inode->Mode()) )
|
||||
return inode->Unref(), -(errno = ENOTDIR);
|
||||
|
||||
uint64_t file_size = inode->Size();
|
||||
uint64_t offset = 0;
|
||||
Block* block = NULL;
|
||||
uint64_t block_id = 0;
|
||||
while ( offset < file_size )
|
||||
{
|
||||
uint64_t entry_block_id = offset / fs->block_size;
|
||||
uint64_t entry_block_offset = offset % fs->block_size;
|
||||
if ( block && block_id != entry_block_id )
|
||||
block->Unref(),
|
||||
block = NULL;
|
||||
if ( !block && !(block = inode->GetBlock(block_id = entry_block_id)) )
|
||||
return inode->Unref(), -errno;
|
||||
const uint8_t* block_data = block->block_data + entry_block_offset;
|
||||
const struct ext_dirent* entry = (const struct ext_dirent*) block_data;
|
||||
if ( entry->inode && entry->name_len && (!rec_num || !rec_num--) )
|
||||
{
|
||||
char* entry_name = new char[entry->name_len+1];
|
||||
memcpy(entry_name, entry->name, entry->name_len);
|
||||
entry_name[entry->name_len] = '\0';
|
||||
bool full = filler(buf, entry_name, NULL, 0);
|
||||
delete[] entry_name;
|
||||
if ( full )
|
||||
{
|
||||
block->Unref();
|
||||
inode->Unref();
|
||||
return 0;
|
||||
}
|
||||
}
|
||||
offset += entry->reclen;
|
||||
}
|
||||
if ( block )
|
||||
block->Unref();
|
||||
|
||||
inode->Unref();
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*int ext2_fuse_lock(const char*, struct fuse_file_info*, int, struct flock*)
|
||||
{
|
||||
return -(errno = ENOSYS);
|
||||
}*/
|
||||
|
||||
int ext2_fuse_utimens(const char* path, const struct timespec tv[2])
|
||||
{
|
||||
Inode* inode = ext2_fuse_resolve_path(path);
|
||||
if ( !inode )
|
||||
return -errno;
|
||||
inode->BeginWrite();
|
||||
inode->data->i_atime = tv[0].tv_sec;
|
||||
inode->data->i_mtime = tv[1].tv_sec;
|
||||
inode->FinishWrite();
|
||||
inode->Unref();
|
||||
return 0;
|
||||
}
|
||||
|
||||
/*int ext2_fuse_bmap(const char*, size_t blocksize, uint64_t* idx)
|
||||
{
|
||||
return -(errno = ENOSYS);
|
||||
}*/
|
||||
|
||||
int ext2_fuse_main(const char* argv0,
|
||||
const char* mount_path,
|
||||
bool foreground,
|
||||
Filesystem* fs,
|
||||
Device* dev)
|
||||
{
|
||||
struct fuse_operations operations;
|
||||
memset(&operations, 0, sizeof(operations));
|
||||
|
||||
operations.access = ext2_fuse_access;
|
||||
operations.chmod = ext2_fuse_chmod;
|
||||
operations.chown = ext2_fuse_chown;
|
||||
operations.create = ext2_fuse_create;
|
||||
operations.destroy = ext2_fuse_destroy;
|
||||
operations.fgetattr = ext2_fuse_fgetattr;
|
||||
operations.flush = ext2_fuse_flush;
|
||||
operations.fsync = ext2_fuse_fsync;
|
||||
operations.ftruncate = ext2_fuse_ftruncate;
|
||||
operations.getattr = ext2_fuse_getattr;
|
||||
operations.init = ext2_fuse_init;
|
||||
operations.link = ext2_fuse_link;
|
||||
operations.mkdir = ext2_fuse_mkdir;
|
||||
operations.mknod = ext2_fuse_mknod;
|
||||
operations.opendir = ext2_fuse_opendir;
|
||||
operations.open = ext2_fuse_open;
|
||||
operations.readdir = ext2_fuse_readdir;
|
||||
operations.read = ext2_fuse_read;
|
||||
operations.readlink = ext2_fuse_readlink;
|
||||
operations.releasedir = ext2_fuse_releasedir;
|
||||
operations.release = ext2_fuse_release;
|
||||
operations.rename = ext2_fuse_rename;
|
||||
operations.rmdir = ext2_fuse_rmdir;
|
||||
operations.statfs = ext2_fuse_statfs;
|
||||
operations.symlink = ext2_fuse_symlink;
|
||||
operations.truncate = ext2_fuse_truncate;
|
||||
operations.unlink = ext2_fuse_unlink;
|
||||
operations.utimens = ext2_fuse_utimens;
|
||||
operations.write = ext2_fuse_write;
|
||||
|
||||
operations.flag_nullpath_ok = 1;
|
||||
operations.flag_nopath = 1;
|
||||
|
||||
char* argv_fuse[] =
|
||||
{
|
||||
(char*) argv0,
|
||||
(char*) "-s",
|
||||
(char*) mount_path,
|
||||
(char*) NULL,
|
||||
};
|
||||
|
||||
int argc_fuse = sizeof(argv_fuse) / sizeof(argv_fuse[0]) - 1;
|
||||
|
||||
struct ext2_fuse_ctx ext2_fuse_ctx;
|
||||
ext2_fuse_ctx.fs = fs;
|
||||
ext2_fuse_ctx.dev = dev;
|
||||
|
||||
(void) foreground;
|
||||
|
||||
return fuse_main(argc_fuse, argv_fuse, &operations, &ext2_fuse_ctx);
|
||||
}
|
||||
|
||||
#endif
|
||||
|
|
@ -0,0 +1,35 @@
|
|||
/*******************************************************************************
|
||||
|
||||
Copyright(C) Jonas 'Sortie' Termansen 2015.
|
||||
|
||||
This program is free software: you can redistribute it and/or modify it
|
||||
under the terms of the GNU General Public License as published by the Free
|
||||
Software Foundation, either version 3 of the License, or (at your option)
|
||||
any later version.
|
||||
|
||||
This program is distributed in the hope that it will be useful, but WITHOUT
|
||||
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
||||
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
||||
more details.
|
||||
|
||||
You should have received a copy of the GNU General Public License along with
|
||||
this program. If not, see <http://www.gnu.org/licenses/>.
|
||||
|
||||
fuse.h
|
||||
FUSE frontend.
|
||||
|
||||
*******************************************************************************/
|
||||
|
||||
#ifndef FUSE_H
|
||||
#define FUSE_H
|
||||
|
||||
class Device;
|
||||
class Filesystem;
|
||||
|
||||
int ext2_fuse_main(const char* argv0,
|
||||
const char* mount_path,
|
||||
bool foreground,
|
||||
Filesystem* fs,
|
||||
Device* dev);
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue