Fix warning reported by Clang static code analyzer:
CC tools/virtiofsd/fuse_lowlevel.o
tools/virtiofsd/fuse_lowlevel.c:195:9: warning: Value stored to 'error' is never read
error = -ERANGE;
^ ~~~~~~~
Fixes: 3db2876
Reported-by: Clang Static Analyzer
Reviewed-by: Ján Tomko <jtomko@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Philippe Mathieu-Daudé <philmd@redhat.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
2689 lines
70 KiB
C
2689 lines
70 KiB
C
/*
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* FUSE: Filesystem in Userspace
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* Copyright (C) 2001-2007 Miklos Szeredi <miklos@szeredi.hu>
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*
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* Implementation of (most of) the low-level FUSE API. The session loop
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* functions are implemented in separate files.
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*
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* This program can be distributed under the terms of the GNU LGPLv2.
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* See the file COPYING.LIB
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*/
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#include "qemu/osdep.h"
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#include "fuse_i.h"
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#include "standard-headers/linux/fuse.h"
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#include "fuse_misc.h"
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#include "fuse_opt.h"
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#include "fuse_virtio.h"
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#include <assert.h>
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#include <errno.h>
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#include <glib.h>
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#include <limits.h>
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#include <stdbool.h>
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#include <stddef.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 <sys/file.h>
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#include <unistd.h>
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#define THREAD_POOL_SIZE 64
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#define OFFSET_MAX 0x7fffffffffffffffLL
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struct fuse_pollhandle {
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uint64_t kh;
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struct fuse_session *se;
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};
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static size_t pagesize;
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static __attribute__((constructor)) void fuse_ll_init_pagesize(void)
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{
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pagesize = getpagesize();
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}
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static void convert_stat(const struct stat *stbuf, struct fuse_attr *attr)
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{
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*attr = (struct fuse_attr){
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.ino = stbuf->st_ino,
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.mode = stbuf->st_mode,
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.nlink = stbuf->st_nlink,
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.uid = stbuf->st_uid,
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.gid = stbuf->st_gid,
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.rdev = stbuf->st_rdev,
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.size = stbuf->st_size,
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.blksize = stbuf->st_blksize,
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.blocks = stbuf->st_blocks,
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.atime = stbuf->st_atime,
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.mtime = stbuf->st_mtime,
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.ctime = stbuf->st_ctime,
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.atimensec = ST_ATIM_NSEC(stbuf),
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.mtimensec = ST_MTIM_NSEC(stbuf),
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.ctimensec = ST_CTIM_NSEC(stbuf),
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};
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}
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static void convert_attr(const struct fuse_setattr_in *attr, struct stat *stbuf)
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{
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stbuf->st_mode = attr->mode;
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stbuf->st_uid = attr->uid;
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stbuf->st_gid = attr->gid;
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stbuf->st_size = attr->size;
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stbuf->st_atime = attr->atime;
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stbuf->st_mtime = attr->mtime;
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stbuf->st_ctime = attr->ctime;
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ST_ATIM_NSEC_SET(stbuf, attr->atimensec);
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ST_MTIM_NSEC_SET(stbuf, attr->mtimensec);
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ST_CTIM_NSEC_SET(stbuf, attr->ctimensec);
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}
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static size_t iov_length(const struct iovec *iov, size_t count)
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{
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size_t seg;
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size_t ret = 0;
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for (seg = 0; seg < count; seg++) {
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ret += iov[seg].iov_len;
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}
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return ret;
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}
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static void list_init_req(struct fuse_req *req)
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{
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req->next = req;
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req->prev = req;
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}
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static void list_del_req(struct fuse_req *req)
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{
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struct fuse_req *prev = req->prev;
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struct fuse_req *next = req->next;
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prev->next = next;
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next->prev = prev;
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}
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static void list_add_req(struct fuse_req *req, struct fuse_req *next)
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{
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struct fuse_req *prev = next->prev;
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req->next = next;
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req->prev = prev;
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prev->next = req;
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next->prev = req;
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}
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static void destroy_req(fuse_req_t req)
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{
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pthread_mutex_destroy(&req->lock);
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free(req);
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}
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void fuse_free_req(fuse_req_t req)
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{
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int ctr;
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struct fuse_session *se = req->se;
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pthread_mutex_lock(&se->lock);
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req->u.ni.func = NULL;
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req->u.ni.data = NULL;
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list_del_req(req);
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ctr = --req->ctr;
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req->ch = NULL;
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pthread_mutex_unlock(&se->lock);
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if (!ctr) {
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destroy_req(req);
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}
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}
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static struct fuse_req *fuse_ll_alloc_req(struct fuse_session *se)
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{
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struct fuse_req *req;
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req = (struct fuse_req *)calloc(1, sizeof(struct fuse_req));
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if (req == NULL) {
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fuse_log(FUSE_LOG_ERR, "fuse: failed to allocate request\n");
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} else {
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req->se = se;
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req->ctr = 1;
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list_init_req(req);
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fuse_mutex_init(&req->lock);
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}
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return req;
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}
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/* Send data. If *ch* is NULL, send via session master fd */
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static int fuse_send_msg(struct fuse_session *se, struct fuse_chan *ch,
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struct iovec *iov, int count)
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{
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struct fuse_out_header *out = iov[0].iov_base;
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out->len = iov_length(iov, count);
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if (out->unique == 0) {
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fuse_log(FUSE_LOG_DEBUG, "NOTIFY: code=%d length=%u\n", out->error,
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out->len);
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} else if (out->error) {
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fuse_log(FUSE_LOG_DEBUG,
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" unique: %llu, error: %i (%s), outsize: %i\n",
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(unsigned long long)out->unique, out->error,
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strerror(-out->error), out->len);
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} else {
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fuse_log(FUSE_LOG_DEBUG, " unique: %llu, success, outsize: %i\n",
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(unsigned long long)out->unique, out->len);
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}
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if (fuse_lowlevel_is_virtio(se)) {
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return virtio_send_msg(se, ch, iov, count);
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}
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abort(); /* virtio should have taken it before here */
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return 0;
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}
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int fuse_send_reply_iov_nofree(fuse_req_t req, int error, struct iovec *iov,
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int count)
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{
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struct fuse_out_header out = {
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.unique = req->unique,
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.error = error,
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};
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if (error <= -1000 || error > 0) {
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fuse_log(FUSE_LOG_ERR, "fuse: bad error value: %i\n", error);
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out.error = -ERANGE;
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}
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iov[0].iov_base = &out;
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iov[0].iov_len = sizeof(struct fuse_out_header);
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return fuse_send_msg(req->se, req->ch, iov, count);
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}
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static int send_reply_iov(fuse_req_t req, int error, struct iovec *iov,
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int count)
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{
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int res;
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res = fuse_send_reply_iov_nofree(req, error, iov, count);
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fuse_free_req(req);
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return res;
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}
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static int send_reply(fuse_req_t req, int error, const void *arg,
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size_t argsize)
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{
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struct iovec iov[2];
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int count = 1;
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if (argsize) {
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iov[1].iov_base = (void *)arg;
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iov[1].iov_len = argsize;
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count++;
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}
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return send_reply_iov(req, error, iov, count);
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}
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int fuse_reply_iov(fuse_req_t req, const struct iovec *iov, int count)
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{
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int res;
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struct iovec *padded_iov;
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padded_iov = malloc((count + 1) * sizeof(struct iovec));
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if (padded_iov == NULL) {
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return fuse_reply_err(req, ENOMEM);
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}
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memcpy(padded_iov + 1, iov, count * sizeof(struct iovec));
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count++;
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res = send_reply_iov(req, 0, padded_iov, count);
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free(padded_iov);
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return res;
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}
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/*
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* 'buf` is allowed to be empty so that the proper size may be
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* allocated by the caller
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*/
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size_t fuse_add_direntry(fuse_req_t req, char *buf, size_t bufsize,
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const char *name, const struct stat *stbuf, off_t off)
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{
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(void)req;
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size_t namelen;
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size_t entlen;
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size_t entlen_padded;
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struct fuse_dirent *dirent;
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namelen = strlen(name);
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entlen = FUSE_NAME_OFFSET + namelen;
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entlen_padded = FUSE_DIRENT_ALIGN(entlen);
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if ((buf == NULL) || (entlen_padded > bufsize)) {
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return entlen_padded;
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}
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dirent = (struct fuse_dirent *)buf;
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dirent->ino = stbuf->st_ino;
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dirent->off = off;
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dirent->namelen = namelen;
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dirent->type = (stbuf->st_mode & S_IFMT) >> 12;
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memcpy(dirent->name, name, namelen);
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memset(dirent->name + namelen, 0, entlen_padded - entlen);
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return entlen_padded;
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}
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static void convert_statfs(const struct statvfs *stbuf,
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struct fuse_kstatfs *kstatfs)
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{
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*kstatfs = (struct fuse_kstatfs){
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.bsize = stbuf->f_bsize,
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.frsize = stbuf->f_frsize,
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.blocks = stbuf->f_blocks,
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.bfree = stbuf->f_bfree,
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.bavail = stbuf->f_bavail,
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.files = stbuf->f_files,
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.ffree = stbuf->f_ffree,
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.namelen = stbuf->f_namemax,
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};
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}
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static int send_reply_ok(fuse_req_t req, const void *arg, size_t argsize)
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{
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return send_reply(req, 0, arg, argsize);
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}
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int fuse_reply_err(fuse_req_t req, int err)
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{
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return send_reply(req, -err, NULL, 0);
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}
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void fuse_reply_none(fuse_req_t req)
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{
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fuse_free_req(req);
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}
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static unsigned long calc_timeout_sec(double t)
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{
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if (t > (double)ULONG_MAX) {
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return ULONG_MAX;
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} else if (t < 0.0) {
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return 0;
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} else {
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return (unsigned long)t;
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}
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}
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static unsigned int calc_timeout_nsec(double t)
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{
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double f = t - (double)calc_timeout_sec(t);
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if (f < 0.0) {
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return 0;
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} else if (f >= 0.999999999) {
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return 999999999;
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} else {
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return (unsigned int)(f * 1.0e9);
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}
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}
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static void fill_entry(struct fuse_entry_out *arg,
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const struct fuse_entry_param *e)
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{
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*arg = (struct fuse_entry_out){
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.nodeid = e->ino,
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.generation = e->generation,
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.entry_valid = calc_timeout_sec(e->entry_timeout),
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.entry_valid_nsec = calc_timeout_nsec(e->entry_timeout),
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.attr_valid = calc_timeout_sec(e->attr_timeout),
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.attr_valid_nsec = calc_timeout_nsec(e->attr_timeout),
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};
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convert_stat(&e->attr, &arg->attr);
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}
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/*
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* `buf` is allowed to be empty so that the proper size may be
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* allocated by the caller
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*/
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size_t fuse_add_direntry_plus(fuse_req_t req, char *buf, size_t bufsize,
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const char *name,
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const struct fuse_entry_param *e, off_t off)
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{
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(void)req;
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size_t namelen;
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size_t entlen;
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size_t entlen_padded;
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namelen = strlen(name);
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entlen = FUSE_NAME_OFFSET_DIRENTPLUS + namelen;
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entlen_padded = FUSE_DIRENT_ALIGN(entlen);
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if ((buf == NULL) || (entlen_padded > bufsize)) {
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return entlen_padded;
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}
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struct fuse_direntplus *dp = (struct fuse_direntplus *)buf;
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memset(&dp->entry_out, 0, sizeof(dp->entry_out));
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fill_entry(&dp->entry_out, e);
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struct fuse_dirent *dirent = &dp->dirent;
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*dirent = (struct fuse_dirent){
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.ino = e->attr.st_ino,
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.off = off,
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.namelen = namelen,
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.type = (e->attr.st_mode & S_IFMT) >> 12,
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};
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memcpy(dirent->name, name, namelen);
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memset(dirent->name + namelen, 0, entlen_padded - entlen);
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return entlen_padded;
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}
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static void fill_open(struct fuse_open_out *arg, const struct fuse_file_info *f)
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{
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arg->fh = f->fh;
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if (f->direct_io) {
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arg->open_flags |= FOPEN_DIRECT_IO;
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}
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if (f->keep_cache) {
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arg->open_flags |= FOPEN_KEEP_CACHE;
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}
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if (f->cache_readdir) {
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arg->open_flags |= FOPEN_CACHE_DIR;
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}
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if (f->nonseekable) {
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arg->open_flags |= FOPEN_NONSEEKABLE;
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}
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}
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int fuse_reply_entry(fuse_req_t req, const struct fuse_entry_param *e)
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{
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struct fuse_entry_out arg;
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size_t size = sizeof(arg);
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memset(&arg, 0, sizeof(arg));
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fill_entry(&arg, e);
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return send_reply_ok(req, &arg, size);
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}
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int fuse_reply_create(fuse_req_t req, const struct fuse_entry_param *e,
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const struct fuse_file_info *f)
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{
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char buf[sizeof(struct fuse_entry_out) + sizeof(struct fuse_open_out)];
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size_t entrysize = sizeof(struct fuse_entry_out);
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struct fuse_entry_out *earg = (struct fuse_entry_out *)buf;
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struct fuse_open_out *oarg = (struct fuse_open_out *)(buf + entrysize);
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memset(buf, 0, sizeof(buf));
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fill_entry(earg, e);
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fill_open(oarg, f);
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return send_reply_ok(req, buf, entrysize + sizeof(struct fuse_open_out));
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}
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int fuse_reply_attr(fuse_req_t req, const struct stat *attr,
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double attr_timeout)
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{
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struct fuse_attr_out arg;
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size_t size = sizeof(arg);
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memset(&arg, 0, sizeof(arg));
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arg.attr_valid = calc_timeout_sec(attr_timeout);
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arg.attr_valid_nsec = calc_timeout_nsec(attr_timeout);
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convert_stat(attr, &arg.attr);
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return send_reply_ok(req, &arg, size);
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}
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int fuse_reply_readlink(fuse_req_t req, const char *linkname)
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{
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return send_reply_ok(req, linkname, strlen(linkname));
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}
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int fuse_reply_open(fuse_req_t req, const struct fuse_file_info *f)
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{
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struct fuse_open_out arg;
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memset(&arg, 0, sizeof(arg));
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fill_open(&arg, f);
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return send_reply_ok(req, &arg, sizeof(arg));
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}
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int fuse_reply_write(fuse_req_t req, size_t count)
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{
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struct fuse_write_out arg;
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memset(&arg, 0, sizeof(arg));
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arg.size = count;
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return send_reply_ok(req, &arg, sizeof(arg));
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}
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int fuse_reply_buf(fuse_req_t req, const char *buf, size_t size)
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{
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return send_reply_ok(req, buf, size);
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}
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static int fuse_send_data_iov_fallback(struct fuse_session *se,
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struct fuse_chan *ch, struct iovec *iov,
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int iov_count, struct fuse_bufvec *buf,
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size_t len)
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{
|
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/* Optimize common case */
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if (buf->count == 1 && buf->idx == 0 && buf->off == 0 &&
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!(buf->buf[0].flags & FUSE_BUF_IS_FD)) {
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/*
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* FIXME: also avoid memory copy if there are multiple buffers
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* but none of them contain an fd
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*/
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iov[iov_count].iov_base = buf->buf[0].mem;
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iov[iov_count].iov_len = len;
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iov_count++;
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return fuse_send_msg(se, ch, iov, iov_count);
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}
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if (fuse_lowlevel_is_virtio(se) && buf->count == 1 &&
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buf->buf[0].flags == (FUSE_BUF_IS_FD | FUSE_BUF_FD_SEEK)) {
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return virtio_send_data_iov(se, ch, iov, iov_count, buf, len);
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}
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abort(); /* Will have taken vhost path */
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return 0;
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}
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static int fuse_send_data_iov(struct fuse_session *se, struct fuse_chan *ch,
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struct iovec *iov, int iov_count,
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struct fuse_bufvec *buf)
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{
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size_t len = fuse_buf_size(buf);
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|
|
return fuse_send_data_iov_fallback(se, ch, iov, iov_count, buf, len);
|
|
}
|
|
|
|
int fuse_reply_data(fuse_req_t req, struct fuse_bufvec *bufv)
|
|
{
|
|
struct iovec iov[2];
|
|
struct fuse_out_header out = {
|
|
.unique = req->unique,
|
|
};
|
|
int res;
|
|
|
|
iov[0].iov_base = &out;
|
|
iov[0].iov_len = sizeof(struct fuse_out_header);
|
|
|
|
res = fuse_send_data_iov(req->se, req->ch, iov, 1, bufv);
|
|
if (res <= 0) {
|
|
fuse_free_req(req);
|
|
return res;
|
|
} else {
|
|
return fuse_reply_err(req, res);
|
|
}
|
|
}
|
|
|
|
int fuse_reply_statfs(fuse_req_t req, const struct statvfs *stbuf)
|
|
{
|
|
struct fuse_statfs_out arg;
|
|
size_t size = sizeof(arg);
|
|
|
|
memset(&arg, 0, sizeof(arg));
|
|
convert_statfs(stbuf, &arg.st);
|
|
|
|
return send_reply_ok(req, &arg, size);
|
|
}
|
|
|
|
int fuse_reply_xattr(fuse_req_t req, size_t count)
|
|
{
|
|
struct fuse_getxattr_out arg;
|
|
|
|
memset(&arg, 0, sizeof(arg));
|
|
arg.size = count;
|
|
|
|
return send_reply_ok(req, &arg, sizeof(arg));
|
|
}
|
|
|
|
int fuse_reply_lock(fuse_req_t req, const struct flock *lock)
|
|
{
|
|
struct fuse_lk_out arg;
|
|
|
|
memset(&arg, 0, sizeof(arg));
|
|
arg.lk.type = lock->l_type;
|
|
if (lock->l_type != F_UNLCK) {
|
|
arg.lk.start = lock->l_start;
|
|
if (lock->l_len == 0) {
|
|
arg.lk.end = OFFSET_MAX;
|
|
} else {
|
|
arg.lk.end = lock->l_start + lock->l_len - 1;
|
|
}
|
|
}
|
|
arg.lk.pid = lock->l_pid;
|
|
return send_reply_ok(req, &arg, sizeof(arg));
|
|
}
|
|
|
|
int fuse_reply_bmap(fuse_req_t req, uint64_t idx)
|
|
{
|
|
struct fuse_bmap_out arg;
|
|
|
|
memset(&arg, 0, sizeof(arg));
|
|
arg.block = idx;
|
|
|
|
return send_reply_ok(req, &arg, sizeof(arg));
|
|
}
|
|
|
|
static struct fuse_ioctl_iovec *fuse_ioctl_iovec_copy(const struct iovec *iov,
|
|
size_t count)
|
|
{
|
|
struct fuse_ioctl_iovec *fiov;
|
|
size_t i;
|
|
|
|
fiov = malloc(sizeof(fiov[0]) * count);
|
|
if (!fiov) {
|
|
return NULL;
|
|
}
|
|
|
|
for (i = 0; i < count; i++) {
|
|
fiov[i].base = (uintptr_t)iov[i].iov_base;
|
|
fiov[i].len = iov[i].iov_len;
|
|
}
|
|
|
|
return fiov;
|
|
}
|
|
|
|
int fuse_reply_ioctl_retry(fuse_req_t req, const struct iovec *in_iov,
|
|
size_t in_count, const struct iovec *out_iov,
|
|
size_t out_count)
|
|
{
|
|
struct fuse_ioctl_out arg;
|
|
struct fuse_ioctl_iovec *in_fiov = NULL;
|
|
struct fuse_ioctl_iovec *out_fiov = NULL;
|
|
struct iovec iov[4];
|
|
size_t count = 1;
|
|
int res;
|
|
|
|
memset(&arg, 0, sizeof(arg));
|
|
arg.flags |= FUSE_IOCTL_RETRY;
|
|
arg.in_iovs = in_count;
|
|
arg.out_iovs = out_count;
|
|
iov[count].iov_base = &arg;
|
|
iov[count].iov_len = sizeof(arg);
|
|
count++;
|
|
|
|
/* Can't handle non-compat 64bit ioctls on 32bit */
|
|
if (sizeof(void *) == 4 && req->ioctl_64bit) {
|
|
res = fuse_reply_err(req, EINVAL);
|
|
goto out;
|
|
}
|
|
|
|
if (in_count) {
|
|
in_fiov = fuse_ioctl_iovec_copy(in_iov, in_count);
|
|
if (!in_fiov) {
|
|
goto enomem;
|
|
}
|
|
|
|
iov[count].iov_base = (void *)in_fiov;
|
|
iov[count].iov_len = sizeof(in_fiov[0]) * in_count;
|
|
count++;
|
|
}
|
|
if (out_count) {
|
|
out_fiov = fuse_ioctl_iovec_copy(out_iov, out_count);
|
|
if (!out_fiov) {
|
|
goto enomem;
|
|
}
|
|
|
|
iov[count].iov_base = (void *)out_fiov;
|
|
iov[count].iov_len = sizeof(out_fiov[0]) * out_count;
|
|
count++;
|
|
}
|
|
|
|
res = send_reply_iov(req, 0, iov, count);
|
|
out:
|
|
free(in_fiov);
|
|
free(out_fiov);
|
|
|
|
return res;
|
|
|
|
enomem:
|
|
res = fuse_reply_err(req, ENOMEM);
|
|
goto out;
|
|
}
|
|
|
|
int fuse_reply_ioctl(fuse_req_t req, int result, const void *buf, size_t size)
|
|
{
|
|
struct fuse_ioctl_out arg;
|
|
struct iovec iov[3];
|
|
size_t count = 1;
|
|
|
|
memset(&arg, 0, sizeof(arg));
|
|
arg.result = result;
|
|
iov[count].iov_base = &arg;
|
|
iov[count].iov_len = sizeof(arg);
|
|
count++;
|
|
|
|
if (size) {
|
|
iov[count].iov_base = (char *)buf;
|
|
iov[count].iov_len = size;
|
|
count++;
|
|
}
|
|
|
|
return send_reply_iov(req, 0, iov, count);
|
|
}
|
|
|
|
int fuse_reply_ioctl_iov(fuse_req_t req, int result, const struct iovec *iov,
|
|
int count)
|
|
{
|
|
struct iovec *padded_iov;
|
|
struct fuse_ioctl_out arg;
|
|
int res;
|
|
|
|
padded_iov = malloc((count + 2) * sizeof(struct iovec));
|
|
if (padded_iov == NULL) {
|
|
return fuse_reply_err(req, ENOMEM);
|
|
}
|
|
|
|
memset(&arg, 0, sizeof(arg));
|
|
arg.result = result;
|
|
padded_iov[1].iov_base = &arg;
|
|
padded_iov[1].iov_len = sizeof(arg);
|
|
|
|
memcpy(&padded_iov[2], iov, count * sizeof(struct iovec));
|
|
|
|
res = send_reply_iov(req, 0, padded_iov, count + 2);
|
|
free(padded_iov);
|
|
|
|
return res;
|
|
}
|
|
|
|
int fuse_reply_poll(fuse_req_t req, unsigned revents)
|
|
{
|
|
struct fuse_poll_out arg;
|
|
|
|
memset(&arg, 0, sizeof(arg));
|
|
arg.revents = revents;
|
|
|
|
return send_reply_ok(req, &arg, sizeof(arg));
|
|
}
|
|
|
|
int fuse_reply_lseek(fuse_req_t req, off_t off)
|
|
{
|
|
struct fuse_lseek_out arg;
|
|
|
|
memset(&arg, 0, sizeof(arg));
|
|
arg.offset = off;
|
|
|
|
return send_reply_ok(req, &arg, sizeof(arg));
|
|
}
|
|
|
|
static void do_lookup(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
const char *name = fuse_mbuf_iter_advance_str(iter);
|
|
if (!name) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
|
|
if (req->se->op.lookup) {
|
|
req->se->op.lookup(req, nodeid, name);
|
|
} else {
|
|
fuse_reply_err(req, ENOSYS);
|
|
}
|
|
}
|
|
|
|
static void do_forget(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
struct fuse_forget_in *arg;
|
|
|
|
arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
if (!arg) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
|
|
if (req->se->op.forget) {
|
|
req->se->op.forget(req, nodeid, arg->nlookup);
|
|
} else {
|
|
fuse_reply_none(req);
|
|
}
|
|
}
|
|
|
|
static void do_batch_forget(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
struct fuse_batch_forget_in *arg;
|
|
struct fuse_forget_data *forgets;
|
|
size_t scount;
|
|
|
|
(void)nodeid;
|
|
|
|
arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
if (!arg) {
|
|
fuse_reply_none(req);
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Prevent integer overflow. The compiler emits the following warning
|
|
* unless we use the scount local variable:
|
|
*
|
|
* error: comparison is always false due to limited range of data type
|
|
* [-Werror=type-limits]
|
|
*
|
|
* This may be true on 64-bit hosts but we need this check for 32-bit
|
|
* hosts.
|
|
*/
|
|
scount = arg->count;
|
|
if (scount > SIZE_MAX / sizeof(forgets[0])) {
|
|
fuse_reply_none(req);
|
|
return;
|
|
}
|
|
|
|
forgets = fuse_mbuf_iter_advance(iter, arg->count * sizeof(forgets[0]));
|
|
if (!forgets) {
|
|
fuse_reply_none(req);
|
|
return;
|
|
}
|
|
|
|
if (req->se->op.forget_multi) {
|
|
req->se->op.forget_multi(req, arg->count, forgets);
|
|
} else if (req->se->op.forget) {
|
|
unsigned int i;
|
|
|
|
for (i = 0; i < arg->count; i++) {
|
|
struct fuse_req *dummy_req;
|
|
|
|
dummy_req = fuse_ll_alloc_req(req->se);
|
|
if (dummy_req == NULL) {
|
|
break;
|
|
}
|
|
|
|
dummy_req->unique = req->unique;
|
|
dummy_req->ctx = req->ctx;
|
|
dummy_req->ch = NULL;
|
|
|
|
req->se->op.forget(dummy_req, forgets[i].ino, forgets[i].nlookup);
|
|
}
|
|
fuse_reply_none(req);
|
|
} else {
|
|
fuse_reply_none(req);
|
|
}
|
|
}
|
|
|
|
static void do_getattr(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
struct fuse_file_info *fip = NULL;
|
|
struct fuse_file_info fi;
|
|
|
|
struct fuse_getattr_in *arg;
|
|
|
|
arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
if (!arg) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
|
|
if (arg->getattr_flags & FUSE_GETATTR_FH) {
|
|
memset(&fi, 0, sizeof(fi));
|
|
fi.fh = arg->fh;
|
|
fip = &fi;
|
|
}
|
|
|
|
if (req->se->op.getattr) {
|
|
req->se->op.getattr(req, nodeid, fip);
|
|
} else {
|
|
fuse_reply_err(req, ENOSYS);
|
|
}
|
|
}
|
|
|
|
static void do_setattr(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
if (req->se->op.setattr) {
|
|
struct fuse_setattr_in *arg;
|
|
struct fuse_file_info *fi = NULL;
|
|
struct fuse_file_info fi_store;
|
|
struct stat stbuf;
|
|
|
|
arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
if (!arg) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
|
|
memset(&stbuf, 0, sizeof(stbuf));
|
|
convert_attr(arg, &stbuf);
|
|
if (arg->valid & FATTR_FH) {
|
|
arg->valid &= ~FATTR_FH;
|
|
memset(&fi_store, 0, sizeof(fi_store));
|
|
fi = &fi_store;
|
|
fi->fh = arg->fh;
|
|
}
|
|
arg->valid &= FUSE_SET_ATTR_MODE | FUSE_SET_ATTR_UID |
|
|
FUSE_SET_ATTR_GID | FUSE_SET_ATTR_SIZE |
|
|
FUSE_SET_ATTR_ATIME | FUSE_SET_ATTR_MTIME |
|
|
FUSE_SET_ATTR_ATIME_NOW | FUSE_SET_ATTR_MTIME_NOW |
|
|
FUSE_SET_ATTR_CTIME;
|
|
|
|
req->se->op.setattr(req, nodeid, &stbuf, arg->valid, fi);
|
|
} else {
|
|
fuse_reply_err(req, ENOSYS);
|
|
}
|
|
}
|
|
|
|
static void do_access(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
struct fuse_access_in *arg;
|
|
|
|
arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
if (!arg) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
|
|
if (req->se->op.access) {
|
|
req->se->op.access(req, nodeid, arg->mask);
|
|
} else {
|
|
fuse_reply_err(req, ENOSYS);
|
|
}
|
|
}
|
|
|
|
static void do_readlink(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
(void)iter;
|
|
|
|
if (req->se->op.readlink) {
|
|
req->se->op.readlink(req, nodeid);
|
|
} else {
|
|
fuse_reply_err(req, ENOSYS);
|
|
}
|
|
}
|
|
|
|
static void do_mknod(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
struct fuse_mknod_in *arg;
|
|
const char *name;
|
|
|
|
arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
name = fuse_mbuf_iter_advance_str(iter);
|
|
if (!arg || !name) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
|
|
req->ctx.umask = arg->umask;
|
|
|
|
if (req->se->op.mknod) {
|
|
req->se->op.mknod(req, nodeid, name, arg->mode, arg->rdev);
|
|
} else {
|
|
fuse_reply_err(req, ENOSYS);
|
|
}
|
|
}
|
|
|
|
static void do_mkdir(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
struct fuse_mkdir_in *arg;
|
|
const char *name;
|
|
|
|
arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
name = fuse_mbuf_iter_advance_str(iter);
|
|
if (!arg || !name) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
|
|
req->ctx.umask = arg->umask;
|
|
|
|
if (req->se->op.mkdir) {
|
|
req->se->op.mkdir(req, nodeid, name, arg->mode);
|
|
} else {
|
|
fuse_reply_err(req, ENOSYS);
|
|
}
|
|
}
|
|
|
|
static void do_unlink(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
const char *name = fuse_mbuf_iter_advance_str(iter);
|
|
|
|
if (!name) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
|
|
if (req->se->op.unlink) {
|
|
req->se->op.unlink(req, nodeid, name);
|
|
} else {
|
|
fuse_reply_err(req, ENOSYS);
|
|
}
|
|
}
|
|
|
|
static void do_rmdir(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
const char *name = fuse_mbuf_iter_advance_str(iter);
|
|
|
|
if (!name) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
|
|
if (req->se->op.rmdir) {
|
|
req->se->op.rmdir(req, nodeid, name);
|
|
} else {
|
|
fuse_reply_err(req, ENOSYS);
|
|
}
|
|
}
|
|
|
|
static void do_symlink(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
const char *name = fuse_mbuf_iter_advance_str(iter);
|
|
const char *linkname = fuse_mbuf_iter_advance_str(iter);
|
|
|
|
if (!name || !linkname) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
|
|
if (req->se->op.symlink) {
|
|
req->se->op.symlink(req, linkname, nodeid, name);
|
|
} else {
|
|
fuse_reply_err(req, ENOSYS);
|
|
}
|
|
}
|
|
|
|
static void do_rename(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
struct fuse_rename_in *arg;
|
|
const char *oldname;
|
|
const char *newname;
|
|
|
|
arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
oldname = fuse_mbuf_iter_advance_str(iter);
|
|
newname = fuse_mbuf_iter_advance_str(iter);
|
|
if (!arg || !oldname || !newname) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
|
|
if (req->se->op.rename) {
|
|
req->se->op.rename(req, nodeid, oldname, arg->newdir, newname, 0);
|
|
} else {
|
|
fuse_reply_err(req, ENOSYS);
|
|
}
|
|
}
|
|
|
|
static void do_rename2(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
struct fuse_rename2_in *arg;
|
|
const char *oldname;
|
|
const char *newname;
|
|
|
|
arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
oldname = fuse_mbuf_iter_advance_str(iter);
|
|
newname = fuse_mbuf_iter_advance_str(iter);
|
|
if (!arg || !oldname || !newname) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
|
|
if (req->se->op.rename) {
|
|
req->se->op.rename(req, nodeid, oldname, arg->newdir, newname,
|
|
arg->flags);
|
|
} else {
|
|
fuse_reply_err(req, ENOSYS);
|
|
}
|
|
}
|
|
|
|
static void do_link(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
struct fuse_link_in *arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
const char *name = fuse_mbuf_iter_advance_str(iter);
|
|
|
|
if (!arg || !name) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
|
|
if (req->se->op.link) {
|
|
req->se->op.link(req, arg->oldnodeid, nodeid, name);
|
|
} else {
|
|
fuse_reply_err(req, ENOSYS);
|
|
}
|
|
}
|
|
|
|
static void do_create(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
if (req->se->op.create) {
|
|
struct fuse_create_in *arg;
|
|
struct fuse_file_info fi;
|
|
const char *name;
|
|
|
|
arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
name = fuse_mbuf_iter_advance_str(iter);
|
|
if (!arg || !name) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
|
|
memset(&fi, 0, sizeof(fi));
|
|
fi.flags = arg->flags;
|
|
|
|
req->ctx.umask = arg->umask;
|
|
|
|
req->se->op.create(req, nodeid, name, arg->mode, &fi);
|
|
} else {
|
|
fuse_reply_err(req, ENOSYS);
|
|
}
|
|
}
|
|
|
|
static void do_open(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
struct fuse_open_in *arg;
|
|
struct fuse_file_info fi;
|
|
|
|
arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
if (!arg) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
|
|
memset(&fi, 0, sizeof(fi));
|
|
fi.flags = arg->flags;
|
|
|
|
if (req->se->op.open) {
|
|
req->se->op.open(req, nodeid, &fi);
|
|
} else {
|
|
fuse_reply_open(req, &fi);
|
|
}
|
|
}
|
|
|
|
static void do_read(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
if (req->se->op.read) {
|
|
struct fuse_read_in *arg;
|
|
struct fuse_file_info fi;
|
|
|
|
arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
if (!arg) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
|
|
memset(&fi, 0, sizeof(fi));
|
|
fi.fh = arg->fh;
|
|
fi.lock_owner = arg->lock_owner;
|
|
fi.flags = arg->flags;
|
|
req->se->op.read(req, nodeid, arg->size, arg->offset, &fi);
|
|
} else {
|
|
fuse_reply_err(req, ENOSYS);
|
|
}
|
|
}
|
|
|
|
static void do_write(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
struct fuse_write_in *arg;
|
|
struct fuse_file_info fi;
|
|
const char *param;
|
|
|
|
arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
if (!arg) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
|
|
param = fuse_mbuf_iter_advance(iter, arg->size);
|
|
if (!param) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
|
|
memset(&fi, 0, sizeof(fi));
|
|
fi.fh = arg->fh;
|
|
fi.writepage = (arg->write_flags & FUSE_WRITE_CACHE) != 0;
|
|
fi.kill_priv = !!(arg->write_flags & FUSE_WRITE_KILL_PRIV);
|
|
|
|
fi.lock_owner = arg->lock_owner;
|
|
fi.flags = arg->flags;
|
|
|
|
if (req->se->op.write) {
|
|
req->se->op.write(req, nodeid, param, arg->size, arg->offset, &fi);
|
|
} else {
|
|
fuse_reply_err(req, ENOSYS);
|
|
}
|
|
}
|
|
|
|
static void do_write_buf(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter, struct fuse_bufvec *ibufv)
|
|
{
|
|
struct fuse_session *se = req->se;
|
|
struct fuse_bufvec *pbufv = ibufv;
|
|
struct fuse_bufvec tmpbufv = {
|
|
.buf[0] = ibufv->buf[0],
|
|
.count = 1,
|
|
};
|
|
struct fuse_write_in *arg;
|
|
size_t arg_size = sizeof(*arg);
|
|
struct fuse_file_info fi;
|
|
|
|
memset(&fi, 0, sizeof(fi));
|
|
|
|
arg = fuse_mbuf_iter_advance(iter, arg_size);
|
|
if (!arg) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
|
|
fi.lock_owner = arg->lock_owner;
|
|
fi.flags = arg->flags;
|
|
fi.fh = arg->fh;
|
|
fi.writepage = !!(arg->write_flags & FUSE_WRITE_CACHE);
|
|
fi.kill_priv = !!(arg->write_flags & FUSE_WRITE_KILL_PRIV);
|
|
|
|
if (ibufv->count == 1) {
|
|
assert(!(tmpbufv.buf[0].flags & FUSE_BUF_IS_FD));
|
|
tmpbufv.buf[0].mem = ((char *)arg) + arg_size;
|
|
tmpbufv.buf[0].size -= sizeof(struct fuse_in_header) + arg_size;
|
|
pbufv = &tmpbufv;
|
|
} else {
|
|
/*
|
|
* Input bufv contains the headers in the first element
|
|
* and the data in the rest, we need to skip that first element
|
|
*/
|
|
ibufv->buf[0].size = 0;
|
|
}
|
|
|
|
if (fuse_buf_size(pbufv) != arg->size) {
|
|
fuse_log(FUSE_LOG_ERR,
|
|
"fuse: do_write_buf: buffer size doesn't match arg->size\n");
|
|
fuse_reply_err(req, EIO);
|
|
return;
|
|
}
|
|
|
|
se->op.write_buf(req, nodeid, pbufv, arg->offset, &fi);
|
|
}
|
|
|
|
static void do_flush(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
struct fuse_flush_in *arg;
|
|
struct fuse_file_info fi;
|
|
|
|
arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
if (!arg) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
|
|
memset(&fi, 0, sizeof(fi));
|
|
fi.fh = arg->fh;
|
|
fi.flush = 1;
|
|
fi.lock_owner = arg->lock_owner;
|
|
|
|
if (req->se->op.flush) {
|
|
req->se->op.flush(req, nodeid, &fi);
|
|
} else {
|
|
fuse_reply_err(req, ENOSYS);
|
|
}
|
|
}
|
|
|
|
static void do_release(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
struct fuse_release_in *arg;
|
|
struct fuse_file_info fi;
|
|
|
|
arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
if (!arg) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
|
|
memset(&fi, 0, sizeof(fi));
|
|
fi.flags = arg->flags;
|
|
fi.fh = arg->fh;
|
|
fi.flush = (arg->release_flags & FUSE_RELEASE_FLUSH) ? 1 : 0;
|
|
fi.lock_owner = arg->lock_owner;
|
|
|
|
if (arg->release_flags & FUSE_RELEASE_FLOCK_UNLOCK) {
|
|
fi.flock_release = 1;
|
|
}
|
|
|
|
if (req->se->op.release) {
|
|
req->se->op.release(req, nodeid, &fi);
|
|
} else {
|
|
fuse_reply_err(req, 0);
|
|
}
|
|
}
|
|
|
|
static void do_fsync(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
struct fuse_fsync_in *arg;
|
|
struct fuse_file_info fi;
|
|
int datasync;
|
|
|
|
arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
if (!arg) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
datasync = arg->fsync_flags & 1;
|
|
|
|
memset(&fi, 0, sizeof(fi));
|
|
fi.fh = arg->fh;
|
|
|
|
if (req->se->op.fsync) {
|
|
if (fi.fh == (uint64_t)-1) {
|
|
req->se->op.fsync(req, nodeid, datasync, NULL);
|
|
} else {
|
|
req->se->op.fsync(req, nodeid, datasync, &fi);
|
|
}
|
|
} else {
|
|
fuse_reply_err(req, ENOSYS);
|
|
}
|
|
}
|
|
|
|
static void do_opendir(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
struct fuse_open_in *arg;
|
|
struct fuse_file_info fi;
|
|
|
|
arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
if (!arg) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
|
|
memset(&fi, 0, sizeof(fi));
|
|
fi.flags = arg->flags;
|
|
|
|
if (req->se->op.opendir) {
|
|
req->se->op.opendir(req, nodeid, &fi);
|
|
} else {
|
|
fuse_reply_open(req, &fi);
|
|
}
|
|
}
|
|
|
|
static void do_readdir(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
struct fuse_read_in *arg;
|
|
struct fuse_file_info fi;
|
|
|
|
arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
if (!arg) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
|
|
memset(&fi, 0, sizeof(fi));
|
|
fi.fh = arg->fh;
|
|
|
|
if (req->se->op.readdir) {
|
|
req->se->op.readdir(req, nodeid, arg->size, arg->offset, &fi);
|
|
} else {
|
|
fuse_reply_err(req, ENOSYS);
|
|
}
|
|
}
|
|
|
|
static void do_readdirplus(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
struct fuse_read_in *arg;
|
|
struct fuse_file_info fi;
|
|
|
|
arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
if (!arg) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
|
|
memset(&fi, 0, sizeof(fi));
|
|
fi.fh = arg->fh;
|
|
|
|
if (req->se->op.readdirplus) {
|
|
req->se->op.readdirplus(req, nodeid, arg->size, arg->offset, &fi);
|
|
} else {
|
|
fuse_reply_err(req, ENOSYS);
|
|
}
|
|
}
|
|
|
|
static void do_releasedir(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
struct fuse_release_in *arg;
|
|
struct fuse_file_info fi;
|
|
|
|
arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
if (!arg) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
|
|
memset(&fi, 0, sizeof(fi));
|
|
fi.flags = arg->flags;
|
|
fi.fh = arg->fh;
|
|
|
|
if (req->se->op.releasedir) {
|
|
req->se->op.releasedir(req, nodeid, &fi);
|
|
} else {
|
|
fuse_reply_err(req, 0);
|
|
}
|
|
}
|
|
|
|
static void do_fsyncdir(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
struct fuse_fsync_in *arg;
|
|
struct fuse_file_info fi;
|
|
int datasync;
|
|
|
|
arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
if (!arg) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
datasync = arg->fsync_flags & 1;
|
|
|
|
memset(&fi, 0, sizeof(fi));
|
|
fi.fh = arg->fh;
|
|
|
|
if (req->se->op.fsyncdir) {
|
|
req->se->op.fsyncdir(req, nodeid, datasync, &fi);
|
|
} else {
|
|
fuse_reply_err(req, ENOSYS);
|
|
}
|
|
}
|
|
|
|
static void do_statfs(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
(void)nodeid;
|
|
(void)iter;
|
|
|
|
if (req->se->op.statfs) {
|
|
req->se->op.statfs(req, nodeid);
|
|
} else {
|
|
struct statvfs buf = {
|
|
.f_namemax = 255,
|
|
.f_bsize = 512,
|
|
};
|
|
fuse_reply_statfs(req, &buf);
|
|
}
|
|
}
|
|
|
|
static void do_setxattr(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
struct fuse_setxattr_in *arg;
|
|
const char *name;
|
|
const char *value;
|
|
|
|
arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
name = fuse_mbuf_iter_advance_str(iter);
|
|
if (!arg || !name) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
|
|
value = fuse_mbuf_iter_advance(iter, arg->size);
|
|
if (!value) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
|
|
if (req->se->op.setxattr) {
|
|
req->se->op.setxattr(req, nodeid, name, value, arg->size, arg->flags);
|
|
} else {
|
|
fuse_reply_err(req, ENOSYS);
|
|
}
|
|
}
|
|
|
|
static void do_getxattr(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
struct fuse_getxattr_in *arg;
|
|
const char *name;
|
|
|
|
arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
name = fuse_mbuf_iter_advance_str(iter);
|
|
if (!arg || !name) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
|
|
if (req->se->op.getxattr) {
|
|
req->se->op.getxattr(req, nodeid, name, arg->size);
|
|
} else {
|
|
fuse_reply_err(req, ENOSYS);
|
|
}
|
|
}
|
|
|
|
static void do_listxattr(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
struct fuse_getxattr_in *arg;
|
|
|
|
arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
if (!arg) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
|
|
if (req->se->op.listxattr) {
|
|
req->se->op.listxattr(req, nodeid, arg->size);
|
|
} else {
|
|
fuse_reply_err(req, ENOSYS);
|
|
}
|
|
}
|
|
|
|
static void do_removexattr(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
const char *name = fuse_mbuf_iter_advance_str(iter);
|
|
|
|
if (!name) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
|
|
if (req->se->op.removexattr) {
|
|
req->se->op.removexattr(req, nodeid, name);
|
|
} else {
|
|
fuse_reply_err(req, ENOSYS);
|
|
}
|
|
}
|
|
|
|
static void convert_fuse_file_lock(struct fuse_file_lock *fl,
|
|
struct flock *flock)
|
|
{
|
|
memset(flock, 0, sizeof(struct flock));
|
|
flock->l_type = fl->type;
|
|
flock->l_whence = SEEK_SET;
|
|
flock->l_start = fl->start;
|
|
if (fl->end == OFFSET_MAX) {
|
|
flock->l_len = 0;
|
|
} else {
|
|
flock->l_len = fl->end - fl->start + 1;
|
|
}
|
|
flock->l_pid = fl->pid;
|
|
}
|
|
|
|
static void do_getlk(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
struct fuse_lk_in *arg;
|
|
struct fuse_file_info fi;
|
|
struct flock flock;
|
|
|
|
arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
if (!arg) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
|
|
memset(&fi, 0, sizeof(fi));
|
|
fi.fh = arg->fh;
|
|
fi.lock_owner = arg->owner;
|
|
|
|
convert_fuse_file_lock(&arg->lk, &flock);
|
|
if (req->se->op.getlk) {
|
|
req->se->op.getlk(req, nodeid, &fi, &flock);
|
|
} else {
|
|
fuse_reply_err(req, ENOSYS);
|
|
}
|
|
}
|
|
|
|
static void do_setlk_common(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter, int sleep)
|
|
{
|
|
struct fuse_lk_in *arg;
|
|
struct fuse_file_info fi;
|
|
struct flock flock;
|
|
|
|
arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
if (!arg) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
|
|
memset(&fi, 0, sizeof(fi));
|
|
fi.fh = arg->fh;
|
|
fi.lock_owner = arg->owner;
|
|
|
|
if (arg->lk_flags & FUSE_LK_FLOCK) {
|
|
int op = 0;
|
|
|
|
switch (arg->lk.type) {
|
|
case F_RDLCK:
|
|
op = LOCK_SH;
|
|
break;
|
|
case F_WRLCK:
|
|
op = LOCK_EX;
|
|
break;
|
|
case F_UNLCK:
|
|
op = LOCK_UN;
|
|
break;
|
|
}
|
|
if (!sleep) {
|
|
op |= LOCK_NB;
|
|
}
|
|
|
|
if (req->se->op.flock) {
|
|
req->se->op.flock(req, nodeid, &fi, op);
|
|
} else {
|
|
fuse_reply_err(req, ENOSYS);
|
|
}
|
|
} else {
|
|
convert_fuse_file_lock(&arg->lk, &flock);
|
|
if (req->se->op.setlk) {
|
|
req->se->op.setlk(req, nodeid, &fi, &flock, sleep);
|
|
} else {
|
|
fuse_reply_err(req, ENOSYS);
|
|
}
|
|
}
|
|
}
|
|
|
|
static void do_setlk(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
do_setlk_common(req, nodeid, iter, 0);
|
|
}
|
|
|
|
static void do_setlkw(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
do_setlk_common(req, nodeid, iter, 1);
|
|
}
|
|
|
|
static int find_interrupted(struct fuse_session *se, struct fuse_req *req)
|
|
{
|
|
struct fuse_req *curr;
|
|
|
|
for (curr = se->list.next; curr != &se->list; curr = curr->next) {
|
|
if (curr->unique == req->u.i.unique) {
|
|
fuse_interrupt_func_t func;
|
|
void *data;
|
|
|
|
curr->ctr++;
|
|
pthread_mutex_unlock(&se->lock);
|
|
|
|
/* Ugh, ugly locking */
|
|
pthread_mutex_lock(&curr->lock);
|
|
pthread_mutex_lock(&se->lock);
|
|
curr->interrupted = 1;
|
|
func = curr->u.ni.func;
|
|
data = curr->u.ni.data;
|
|
pthread_mutex_unlock(&se->lock);
|
|
if (func) {
|
|
func(curr, data);
|
|
}
|
|
pthread_mutex_unlock(&curr->lock);
|
|
|
|
pthread_mutex_lock(&se->lock);
|
|
curr->ctr--;
|
|
if (!curr->ctr) {
|
|
destroy_req(curr);
|
|
}
|
|
|
|
return 1;
|
|
}
|
|
}
|
|
for (curr = se->interrupts.next; curr != &se->interrupts;
|
|
curr = curr->next) {
|
|
if (curr->u.i.unique == req->u.i.unique) {
|
|
return 1;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static void do_interrupt(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
struct fuse_interrupt_in *arg;
|
|
struct fuse_session *se = req->se;
|
|
|
|
(void)nodeid;
|
|
|
|
arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
if (!arg) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
|
|
fuse_log(FUSE_LOG_DEBUG, "INTERRUPT: %llu\n",
|
|
(unsigned long long)arg->unique);
|
|
|
|
req->u.i.unique = arg->unique;
|
|
|
|
pthread_mutex_lock(&se->lock);
|
|
if (find_interrupted(se, req)) {
|
|
destroy_req(req);
|
|
} else {
|
|
list_add_req(req, &se->interrupts);
|
|
}
|
|
pthread_mutex_unlock(&se->lock);
|
|
}
|
|
|
|
static struct fuse_req *check_interrupt(struct fuse_session *se,
|
|
struct fuse_req *req)
|
|
{
|
|
struct fuse_req *curr;
|
|
|
|
for (curr = se->interrupts.next; curr != &se->interrupts;
|
|
curr = curr->next) {
|
|
if (curr->u.i.unique == req->unique) {
|
|
req->interrupted = 1;
|
|
list_del_req(curr);
|
|
free(curr);
|
|
return NULL;
|
|
}
|
|
}
|
|
curr = se->interrupts.next;
|
|
if (curr != &se->interrupts) {
|
|
list_del_req(curr);
|
|
list_init_req(curr);
|
|
return curr;
|
|
} else {
|
|
return NULL;
|
|
}
|
|
}
|
|
|
|
static void do_bmap(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
struct fuse_bmap_in *arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
|
|
if (!arg) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
|
|
if (req->se->op.bmap) {
|
|
req->se->op.bmap(req, nodeid, arg->blocksize, arg->block);
|
|
} else {
|
|
fuse_reply_err(req, ENOSYS);
|
|
}
|
|
}
|
|
|
|
static void do_ioctl(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
struct fuse_ioctl_in *arg;
|
|
unsigned int flags;
|
|
void *in_buf = NULL;
|
|
struct fuse_file_info fi;
|
|
|
|
arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
if (!arg) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
|
|
flags = arg->flags;
|
|
if (flags & FUSE_IOCTL_DIR && !(req->se->conn.want & FUSE_CAP_IOCTL_DIR)) {
|
|
fuse_reply_err(req, ENOTTY);
|
|
return;
|
|
}
|
|
|
|
if (arg->in_size) {
|
|
in_buf = fuse_mbuf_iter_advance(iter, arg->in_size);
|
|
if (!in_buf) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
}
|
|
|
|
memset(&fi, 0, sizeof(fi));
|
|
fi.fh = arg->fh;
|
|
|
|
if (sizeof(void *) == 4 && !(flags & FUSE_IOCTL_32BIT)) {
|
|
req->ioctl_64bit = 1;
|
|
}
|
|
|
|
if (req->se->op.ioctl) {
|
|
req->se->op.ioctl(req, nodeid, arg->cmd, (void *)(uintptr_t)arg->arg,
|
|
&fi, flags, in_buf, arg->in_size, arg->out_size);
|
|
} else {
|
|
fuse_reply_err(req, ENOSYS);
|
|
}
|
|
}
|
|
|
|
void fuse_pollhandle_destroy(struct fuse_pollhandle *ph)
|
|
{
|
|
free(ph);
|
|
}
|
|
|
|
static void do_poll(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
struct fuse_poll_in *arg;
|
|
struct fuse_file_info fi;
|
|
|
|
arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
if (!arg) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
|
|
memset(&fi, 0, sizeof(fi));
|
|
fi.fh = arg->fh;
|
|
fi.poll_events = arg->events;
|
|
|
|
if (req->se->op.poll) {
|
|
struct fuse_pollhandle *ph = NULL;
|
|
|
|
if (arg->flags & FUSE_POLL_SCHEDULE_NOTIFY) {
|
|
ph = malloc(sizeof(struct fuse_pollhandle));
|
|
if (ph == NULL) {
|
|
fuse_reply_err(req, ENOMEM);
|
|
return;
|
|
}
|
|
ph->kh = arg->kh;
|
|
ph->se = req->se;
|
|
}
|
|
|
|
req->se->op.poll(req, nodeid, &fi, ph);
|
|
} else {
|
|
fuse_reply_err(req, ENOSYS);
|
|
}
|
|
}
|
|
|
|
static void do_fallocate(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
struct fuse_fallocate_in *arg;
|
|
struct fuse_file_info fi;
|
|
|
|
arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
if (!arg) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
|
|
memset(&fi, 0, sizeof(fi));
|
|
fi.fh = arg->fh;
|
|
|
|
if (req->se->op.fallocate) {
|
|
req->se->op.fallocate(req, nodeid, arg->mode, arg->offset, arg->length,
|
|
&fi);
|
|
} else {
|
|
fuse_reply_err(req, ENOSYS);
|
|
}
|
|
}
|
|
|
|
static void do_copy_file_range(fuse_req_t req, fuse_ino_t nodeid_in,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
struct fuse_copy_file_range_in *arg;
|
|
struct fuse_file_info fi_in, fi_out;
|
|
|
|
arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
if (!arg) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
|
|
memset(&fi_in, 0, sizeof(fi_in));
|
|
fi_in.fh = arg->fh_in;
|
|
|
|
memset(&fi_out, 0, sizeof(fi_out));
|
|
fi_out.fh = arg->fh_out;
|
|
|
|
|
|
if (req->se->op.copy_file_range) {
|
|
req->se->op.copy_file_range(req, nodeid_in, arg->off_in, &fi_in,
|
|
arg->nodeid_out, arg->off_out, &fi_out,
|
|
arg->len, arg->flags);
|
|
} else {
|
|
fuse_reply_err(req, ENOSYS);
|
|
}
|
|
}
|
|
|
|
static void do_lseek(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
struct fuse_lseek_in *arg;
|
|
struct fuse_file_info fi;
|
|
|
|
arg = fuse_mbuf_iter_advance(iter, sizeof(*arg));
|
|
if (!arg) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
memset(&fi, 0, sizeof(fi));
|
|
fi.fh = arg->fh;
|
|
|
|
if (req->se->op.lseek) {
|
|
req->se->op.lseek(req, nodeid, arg->offset, arg->whence, &fi);
|
|
} else {
|
|
fuse_reply_err(req, ENOSYS);
|
|
}
|
|
}
|
|
|
|
static void do_init(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
size_t compat_size = offsetof(struct fuse_init_in, max_readahead);
|
|
struct fuse_init_in *arg;
|
|
struct fuse_init_out outarg;
|
|
struct fuse_session *se = req->se;
|
|
size_t bufsize = se->bufsize;
|
|
size_t outargsize = sizeof(outarg);
|
|
|
|
(void)nodeid;
|
|
|
|
/* First consume the old fields... */
|
|
arg = fuse_mbuf_iter_advance(iter, compat_size);
|
|
if (!arg) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
|
|
/* ...and now consume the new fields. */
|
|
if (arg->major == 7 && arg->minor >= 6) {
|
|
if (!fuse_mbuf_iter_advance(iter, sizeof(*arg) - compat_size)) {
|
|
fuse_reply_err(req, EINVAL);
|
|
return;
|
|
}
|
|
}
|
|
|
|
fuse_log(FUSE_LOG_DEBUG, "INIT: %u.%u\n", arg->major, arg->minor);
|
|
if (arg->major == 7 && arg->minor >= 6) {
|
|
fuse_log(FUSE_LOG_DEBUG, "flags=0x%08x\n", arg->flags);
|
|
fuse_log(FUSE_LOG_DEBUG, "max_readahead=0x%08x\n", arg->max_readahead);
|
|
}
|
|
se->conn.proto_major = arg->major;
|
|
se->conn.proto_minor = arg->minor;
|
|
se->conn.capable = 0;
|
|
se->conn.want = 0;
|
|
|
|
memset(&outarg, 0, sizeof(outarg));
|
|
outarg.major = FUSE_KERNEL_VERSION;
|
|
outarg.minor = FUSE_KERNEL_MINOR_VERSION;
|
|
|
|
if (arg->major < 7 || (arg->major == 7 && arg->minor < 31)) {
|
|
fuse_log(FUSE_LOG_ERR, "fuse: unsupported protocol version: %u.%u\n",
|
|
arg->major, arg->minor);
|
|
fuse_reply_err(req, EPROTO);
|
|
return;
|
|
}
|
|
|
|
if (arg->major > 7) {
|
|
/* Wait for a second INIT request with a 7.X version */
|
|
send_reply_ok(req, &outarg, sizeof(outarg));
|
|
return;
|
|
}
|
|
|
|
if (arg->max_readahead < se->conn.max_readahead) {
|
|
se->conn.max_readahead = arg->max_readahead;
|
|
}
|
|
if (arg->flags & FUSE_ASYNC_READ) {
|
|
se->conn.capable |= FUSE_CAP_ASYNC_READ;
|
|
}
|
|
if (arg->flags & FUSE_POSIX_LOCKS) {
|
|
se->conn.capable |= FUSE_CAP_POSIX_LOCKS;
|
|
}
|
|
if (arg->flags & FUSE_ATOMIC_O_TRUNC) {
|
|
se->conn.capable |= FUSE_CAP_ATOMIC_O_TRUNC;
|
|
}
|
|
if (arg->flags & FUSE_EXPORT_SUPPORT) {
|
|
se->conn.capable |= FUSE_CAP_EXPORT_SUPPORT;
|
|
}
|
|
if (arg->flags & FUSE_DONT_MASK) {
|
|
se->conn.capable |= FUSE_CAP_DONT_MASK;
|
|
}
|
|
if (arg->flags & FUSE_FLOCK_LOCKS) {
|
|
se->conn.capable |= FUSE_CAP_FLOCK_LOCKS;
|
|
}
|
|
if (arg->flags & FUSE_AUTO_INVAL_DATA) {
|
|
se->conn.capable |= FUSE_CAP_AUTO_INVAL_DATA;
|
|
}
|
|
if (arg->flags & FUSE_DO_READDIRPLUS) {
|
|
se->conn.capable |= FUSE_CAP_READDIRPLUS;
|
|
}
|
|
if (arg->flags & FUSE_READDIRPLUS_AUTO) {
|
|
se->conn.capable |= FUSE_CAP_READDIRPLUS_AUTO;
|
|
}
|
|
if (arg->flags & FUSE_ASYNC_DIO) {
|
|
se->conn.capable |= FUSE_CAP_ASYNC_DIO;
|
|
}
|
|
if (arg->flags & FUSE_WRITEBACK_CACHE) {
|
|
se->conn.capable |= FUSE_CAP_WRITEBACK_CACHE;
|
|
}
|
|
if (arg->flags & FUSE_NO_OPEN_SUPPORT) {
|
|
se->conn.capable |= FUSE_CAP_NO_OPEN_SUPPORT;
|
|
}
|
|
if (arg->flags & FUSE_PARALLEL_DIROPS) {
|
|
se->conn.capable |= FUSE_CAP_PARALLEL_DIROPS;
|
|
}
|
|
if (arg->flags & FUSE_POSIX_ACL) {
|
|
se->conn.capable |= FUSE_CAP_POSIX_ACL;
|
|
}
|
|
if (arg->flags & FUSE_HANDLE_KILLPRIV) {
|
|
se->conn.capable |= FUSE_CAP_HANDLE_KILLPRIV;
|
|
}
|
|
if (arg->flags & FUSE_NO_OPENDIR_SUPPORT) {
|
|
se->conn.capable |= FUSE_CAP_NO_OPENDIR_SUPPORT;
|
|
}
|
|
if (!(arg->flags & FUSE_MAX_PAGES)) {
|
|
size_t max_bufsize = FUSE_DEFAULT_MAX_PAGES_PER_REQ * getpagesize() +
|
|
FUSE_BUFFER_HEADER_SIZE;
|
|
if (bufsize > max_bufsize) {
|
|
bufsize = max_bufsize;
|
|
}
|
|
}
|
|
#ifdef HAVE_SPLICE
|
|
#ifdef HAVE_VMSPLICE
|
|
se->conn.capable |= FUSE_CAP_SPLICE_WRITE | FUSE_CAP_SPLICE_MOVE;
|
|
#endif
|
|
se->conn.capable |= FUSE_CAP_SPLICE_READ;
|
|
#endif
|
|
se->conn.capable |= FUSE_CAP_IOCTL_DIR;
|
|
|
|
/*
|
|
* Default settings for modern filesystems.
|
|
*
|
|
* Most of these capabilities were disabled by default in
|
|
* libfuse2 for backwards compatibility reasons. In libfuse3,
|
|
* we can finally enable them by default (as long as they're
|
|
* supported by the kernel).
|
|
*/
|
|
#define LL_SET_DEFAULT(cond, cap) \
|
|
if ((cond) && (se->conn.capable & (cap))) \
|
|
se->conn.want |= (cap)
|
|
LL_SET_DEFAULT(1, FUSE_CAP_ASYNC_READ);
|
|
LL_SET_DEFAULT(1, FUSE_CAP_PARALLEL_DIROPS);
|
|
LL_SET_DEFAULT(1, FUSE_CAP_AUTO_INVAL_DATA);
|
|
LL_SET_DEFAULT(1, FUSE_CAP_HANDLE_KILLPRIV);
|
|
LL_SET_DEFAULT(1, FUSE_CAP_ASYNC_DIO);
|
|
LL_SET_DEFAULT(1, FUSE_CAP_IOCTL_DIR);
|
|
LL_SET_DEFAULT(1, FUSE_CAP_ATOMIC_O_TRUNC);
|
|
LL_SET_DEFAULT(se->op.write_buf, FUSE_CAP_SPLICE_READ);
|
|
LL_SET_DEFAULT(se->op.getlk && se->op.setlk, FUSE_CAP_POSIX_LOCKS);
|
|
LL_SET_DEFAULT(se->op.flock, FUSE_CAP_FLOCK_LOCKS);
|
|
LL_SET_DEFAULT(se->op.readdirplus, FUSE_CAP_READDIRPLUS);
|
|
LL_SET_DEFAULT(se->op.readdirplus && se->op.readdir,
|
|
FUSE_CAP_READDIRPLUS_AUTO);
|
|
se->conn.time_gran = 1;
|
|
|
|
if (bufsize < FUSE_MIN_READ_BUFFER) {
|
|
fuse_log(FUSE_LOG_ERR, "fuse: warning: buffer size too small: %zu\n",
|
|
bufsize);
|
|
bufsize = FUSE_MIN_READ_BUFFER;
|
|
}
|
|
se->bufsize = bufsize;
|
|
|
|
if (se->conn.max_write > bufsize - FUSE_BUFFER_HEADER_SIZE) {
|
|
se->conn.max_write = bufsize - FUSE_BUFFER_HEADER_SIZE;
|
|
}
|
|
|
|
se->got_init = 1;
|
|
se->got_destroy = 0;
|
|
if (se->op.init) {
|
|
se->op.init(se->userdata, &se->conn);
|
|
}
|
|
|
|
if (se->conn.want & (~se->conn.capable)) {
|
|
fuse_log(FUSE_LOG_ERR,
|
|
"fuse: error: filesystem requested capabilities "
|
|
"0x%x that are not supported by kernel, aborting.\n",
|
|
se->conn.want & (~se->conn.capable));
|
|
fuse_reply_err(req, EPROTO);
|
|
se->error = -EPROTO;
|
|
fuse_session_exit(se);
|
|
return;
|
|
}
|
|
|
|
if (se->conn.max_write < bufsize - FUSE_BUFFER_HEADER_SIZE) {
|
|
se->bufsize = se->conn.max_write + FUSE_BUFFER_HEADER_SIZE;
|
|
}
|
|
if (arg->flags & FUSE_MAX_PAGES) {
|
|
outarg.flags |= FUSE_MAX_PAGES;
|
|
outarg.max_pages = (se->conn.max_write - 1) / getpagesize() + 1;
|
|
}
|
|
|
|
/*
|
|
* Always enable big writes, this is superseded
|
|
* by the max_write option
|
|
*/
|
|
outarg.flags |= FUSE_BIG_WRITES;
|
|
|
|
if (se->conn.want & FUSE_CAP_ASYNC_READ) {
|
|
outarg.flags |= FUSE_ASYNC_READ;
|
|
}
|
|
if (se->conn.want & FUSE_CAP_PARALLEL_DIROPS) {
|
|
outarg.flags |= FUSE_PARALLEL_DIROPS;
|
|
}
|
|
if (se->conn.want & FUSE_CAP_POSIX_LOCKS) {
|
|
outarg.flags |= FUSE_POSIX_LOCKS;
|
|
}
|
|
if (se->conn.want & FUSE_CAP_ATOMIC_O_TRUNC) {
|
|
outarg.flags |= FUSE_ATOMIC_O_TRUNC;
|
|
}
|
|
if (se->conn.want & FUSE_CAP_EXPORT_SUPPORT) {
|
|
outarg.flags |= FUSE_EXPORT_SUPPORT;
|
|
}
|
|
if (se->conn.want & FUSE_CAP_DONT_MASK) {
|
|
outarg.flags |= FUSE_DONT_MASK;
|
|
}
|
|
if (se->conn.want & FUSE_CAP_FLOCK_LOCKS) {
|
|
outarg.flags |= FUSE_FLOCK_LOCKS;
|
|
}
|
|
if (se->conn.want & FUSE_CAP_AUTO_INVAL_DATA) {
|
|
outarg.flags |= FUSE_AUTO_INVAL_DATA;
|
|
}
|
|
if (se->conn.want & FUSE_CAP_READDIRPLUS) {
|
|
outarg.flags |= FUSE_DO_READDIRPLUS;
|
|
}
|
|
if (se->conn.want & FUSE_CAP_READDIRPLUS_AUTO) {
|
|
outarg.flags |= FUSE_READDIRPLUS_AUTO;
|
|
}
|
|
if (se->conn.want & FUSE_CAP_ASYNC_DIO) {
|
|
outarg.flags |= FUSE_ASYNC_DIO;
|
|
}
|
|
if (se->conn.want & FUSE_CAP_WRITEBACK_CACHE) {
|
|
outarg.flags |= FUSE_WRITEBACK_CACHE;
|
|
}
|
|
if (se->conn.want & FUSE_CAP_POSIX_ACL) {
|
|
outarg.flags |= FUSE_POSIX_ACL;
|
|
}
|
|
outarg.max_readahead = se->conn.max_readahead;
|
|
outarg.max_write = se->conn.max_write;
|
|
if (se->conn.max_background >= (1 << 16)) {
|
|
se->conn.max_background = (1 << 16) - 1;
|
|
}
|
|
if (se->conn.congestion_threshold > se->conn.max_background) {
|
|
se->conn.congestion_threshold = se->conn.max_background;
|
|
}
|
|
if (!se->conn.congestion_threshold) {
|
|
se->conn.congestion_threshold = se->conn.max_background * 3 / 4;
|
|
}
|
|
|
|
outarg.max_background = se->conn.max_background;
|
|
outarg.congestion_threshold = se->conn.congestion_threshold;
|
|
outarg.time_gran = se->conn.time_gran;
|
|
|
|
fuse_log(FUSE_LOG_DEBUG, " INIT: %u.%u\n", outarg.major, outarg.minor);
|
|
fuse_log(FUSE_LOG_DEBUG, " flags=0x%08x\n", outarg.flags);
|
|
fuse_log(FUSE_LOG_DEBUG, " max_readahead=0x%08x\n", outarg.max_readahead);
|
|
fuse_log(FUSE_LOG_DEBUG, " max_write=0x%08x\n", outarg.max_write);
|
|
fuse_log(FUSE_LOG_DEBUG, " max_background=%i\n", outarg.max_background);
|
|
fuse_log(FUSE_LOG_DEBUG, " congestion_threshold=%i\n",
|
|
outarg.congestion_threshold);
|
|
fuse_log(FUSE_LOG_DEBUG, " time_gran=%u\n", outarg.time_gran);
|
|
|
|
send_reply_ok(req, &outarg, outargsize);
|
|
}
|
|
|
|
static void do_destroy(fuse_req_t req, fuse_ino_t nodeid,
|
|
struct fuse_mbuf_iter *iter)
|
|
{
|
|
struct fuse_session *se = req->se;
|
|
|
|
(void)nodeid;
|
|
(void)iter;
|
|
|
|
se->got_destroy = 1;
|
|
se->got_init = 0;
|
|
if (se->op.destroy) {
|
|
se->op.destroy(se->userdata);
|
|
}
|
|
|
|
send_reply_ok(req, NULL, 0);
|
|
}
|
|
|
|
static int send_notify_iov(struct fuse_session *se, int notify_code,
|
|
struct iovec *iov, int count)
|
|
{
|
|
struct fuse_out_header out = {
|
|
.error = notify_code,
|
|
};
|
|
|
|
if (!se->got_init) {
|
|
return -ENOTCONN;
|
|
}
|
|
|
|
iov[0].iov_base = &out;
|
|
iov[0].iov_len = sizeof(struct fuse_out_header);
|
|
|
|
return fuse_send_msg(se, NULL, iov, count);
|
|
}
|
|
|
|
int fuse_lowlevel_notify_poll(struct fuse_pollhandle *ph)
|
|
{
|
|
if (ph != NULL) {
|
|
struct fuse_notify_poll_wakeup_out outarg = {
|
|
.kh = ph->kh,
|
|
};
|
|
struct iovec iov[2];
|
|
|
|
iov[1].iov_base = &outarg;
|
|
iov[1].iov_len = sizeof(outarg);
|
|
|
|
return send_notify_iov(ph->se, FUSE_NOTIFY_POLL, iov, 2);
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
int fuse_lowlevel_notify_inval_inode(struct fuse_session *se, fuse_ino_t ino,
|
|
off_t off, off_t len)
|
|
{
|
|
struct fuse_notify_inval_inode_out outarg = {
|
|
.ino = ino,
|
|
.off = off,
|
|
.len = len,
|
|
};
|
|
struct iovec iov[2];
|
|
|
|
if (!se) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
iov[1].iov_base = &outarg;
|
|
iov[1].iov_len = sizeof(outarg);
|
|
|
|
return send_notify_iov(se, FUSE_NOTIFY_INVAL_INODE, iov, 2);
|
|
}
|
|
|
|
int fuse_lowlevel_notify_inval_entry(struct fuse_session *se, fuse_ino_t parent,
|
|
const char *name, size_t namelen)
|
|
{
|
|
struct fuse_notify_inval_entry_out outarg = {
|
|
.parent = parent,
|
|
.namelen = namelen,
|
|
};
|
|
struct iovec iov[3];
|
|
|
|
if (!se) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
iov[1].iov_base = &outarg;
|
|
iov[1].iov_len = sizeof(outarg);
|
|
iov[2].iov_base = (void *)name;
|
|
iov[2].iov_len = namelen + 1;
|
|
|
|
return send_notify_iov(se, FUSE_NOTIFY_INVAL_ENTRY, iov, 3);
|
|
}
|
|
|
|
int fuse_lowlevel_notify_delete(struct fuse_session *se, fuse_ino_t parent,
|
|
fuse_ino_t child, const char *name,
|
|
size_t namelen)
|
|
{
|
|
struct fuse_notify_delete_out outarg = {
|
|
.parent = parent,
|
|
.child = child,
|
|
.namelen = namelen,
|
|
};
|
|
struct iovec iov[3];
|
|
|
|
if (!se) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
iov[1].iov_base = &outarg;
|
|
iov[1].iov_len = sizeof(outarg);
|
|
iov[2].iov_base = (void *)name;
|
|
iov[2].iov_len = namelen + 1;
|
|
|
|
return send_notify_iov(se, FUSE_NOTIFY_DELETE, iov, 3);
|
|
}
|
|
|
|
int fuse_lowlevel_notify_store(struct fuse_session *se, fuse_ino_t ino,
|
|
off_t offset, struct fuse_bufvec *bufv)
|
|
{
|
|
struct fuse_out_header out = {
|
|
.error = FUSE_NOTIFY_STORE,
|
|
};
|
|
struct fuse_notify_store_out outarg = {
|
|
.nodeid = ino,
|
|
.offset = offset,
|
|
.size = fuse_buf_size(bufv),
|
|
};
|
|
struct iovec iov[3];
|
|
int res;
|
|
|
|
if (!se) {
|
|
return -EINVAL;
|
|
}
|
|
|
|
iov[0].iov_base = &out;
|
|
iov[0].iov_len = sizeof(out);
|
|
iov[1].iov_base = &outarg;
|
|
iov[1].iov_len = sizeof(outarg);
|
|
|
|
res = fuse_send_data_iov(se, NULL, iov, 2, bufv);
|
|
if (res > 0) {
|
|
res = -res;
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
void *fuse_req_userdata(fuse_req_t req)
|
|
{
|
|
return req->se->userdata;
|
|
}
|
|
|
|
const struct fuse_ctx *fuse_req_ctx(fuse_req_t req)
|
|
{
|
|
return &req->ctx;
|
|
}
|
|
|
|
void fuse_req_interrupt_func(fuse_req_t req, fuse_interrupt_func_t func,
|
|
void *data)
|
|
{
|
|
pthread_mutex_lock(&req->lock);
|
|
pthread_mutex_lock(&req->se->lock);
|
|
req->u.ni.func = func;
|
|
req->u.ni.data = data;
|
|
pthread_mutex_unlock(&req->se->lock);
|
|
if (req->interrupted && func) {
|
|
func(req, data);
|
|
}
|
|
pthread_mutex_unlock(&req->lock);
|
|
}
|
|
|
|
int fuse_req_interrupted(fuse_req_t req)
|
|
{
|
|
int interrupted;
|
|
|
|
pthread_mutex_lock(&req->se->lock);
|
|
interrupted = req->interrupted;
|
|
pthread_mutex_unlock(&req->se->lock);
|
|
|
|
return interrupted;
|
|
}
|
|
|
|
static struct {
|
|
void (*func)(fuse_req_t, fuse_ino_t, struct fuse_mbuf_iter *);
|
|
const char *name;
|
|
} fuse_ll_ops[] = {
|
|
[FUSE_LOOKUP] = { do_lookup, "LOOKUP" },
|
|
[FUSE_FORGET] = { do_forget, "FORGET" },
|
|
[FUSE_GETATTR] = { do_getattr, "GETATTR" },
|
|
[FUSE_SETATTR] = { do_setattr, "SETATTR" },
|
|
[FUSE_READLINK] = { do_readlink, "READLINK" },
|
|
[FUSE_SYMLINK] = { do_symlink, "SYMLINK" },
|
|
[FUSE_MKNOD] = { do_mknod, "MKNOD" },
|
|
[FUSE_MKDIR] = { do_mkdir, "MKDIR" },
|
|
[FUSE_UNLINK] = { do_unlink, "UNLINK" },
|
|
[FUSE_RMDIR] = { do_rmdir, "RMDIR" },
|
|
[FUSE_RENAME] = { do_rename, "RENAME" },
|
|
[FUSE_LINK] = { do_link, "LINK" },
|
|
[FUSE_OPEN] = { do_open, "OPEN" },
|
|
[FUSE_READ] = { do_read, "READ" },
|
|
[FUSE_WRITE] = { do_write, "WRITE" },
|
|
[FUSE_STATFS] = { do_statfs, "STATFS" },
|
|
[FUSE_RELEASE] = { do_release, "RELEASE" },
|
|
[FUSE_FSYNC] = { do_fsync, "FSYNC" },
|
|
[FUSE_SETXATTR] = { do_setxattr, "SETXATTR" },
|
|
[FUSE_GETXATTR] = { do_getxattr, "GETXATTR" },
|
|
[FUSE_LISTXATTR] = { do_listxattr, "LISTXATTR" },
|
|
[FUSE_REMOVEXATTR] = { do_removexattr, "REMOVEXATTR" },
|
|
[FUSE_FLUSH] = { do_flush, "FLUSH" },
|
|
[FUSE_INIT] = { do_init, "INIT" },
|
|
[FUSE_OPENDIR] = { do_opendir, "OPENDIR" },
|
|
[FUSE_READDIR] = { do_readdir, "READDIR" },
|
|
[FUSE_RELEASEDIR] = { do_releasedir, "RELEASEDIR" },
|
|
[FUSE_FSYNCDIR] = { do_fsyncdir, "FSYNCDIR" },
|
|
[FUSE_GETLK] = { do_getlk, "GETLK" },
|
|
[FUSE_SETLK] = { do_setlk, "SETLK" },
|
|
[FUSE_SETLKW] = { do_setlkw, "SETLKW" },
|
|
[FUSE_ACCESS] = { do_access, "ACCESS" },
|
|
[FUSE_CREATE] = { do_create, "CREATE" },
|
|
[FUSE_INTERRUPT] = { do_interrupt, "INTERRUPT" },
|
|
[FUSE_BMAP] = { do_bmap, "BMAP" },
|
|
[FUSE_IOCTL] = { do_ioctl, "IOCTL" },
|
|
[FUSE_POLL] = { do_poll, "POLL" },
|
|
[FUSE_FALLOCATE] = { do_fallocate, "FALLOCATE" },
|
|
[FUSE_DESTROY] = { do_destroy, "DESTROY" },
|
|
[FUSE_NOTIFY_REPLY] = { NULL, "NOTIFY_REPLY" },
|
|
[FUSE_BATCH_FORGET] = { do_batch_forget, "BATCH_FORGET" },
|
|
[FUSE_READDIRPLUS] = { do_readdirplus, "READDIRPLUS" },
|
|
[FUSE_RENAME2] = { do_rename2, "RENAME2" },
|
|
[FUSE_COPY_FILE_RANGE] = { do_copy_file_range, "COPY_FILE_RANGE" },
|
|
[FUSE_LSEEK] = { do_lseek, "LSEEK" },
|
|
};
|
|
|
|
#define FUSE_MAXOP (sizeof(fuse_ll_ops) / sizeof(fuse_ll_ops[0]))
|
|
|
|
static const char *opname(enum fuse_opcode opcode)
|
|
{
|
|
if (opcode >= FUSE_MAXOP || !fuse_ll_ops[opcode].name) {
|
|
return "???";
|
|
} else {
|
|
return fuse_ll_ops[opcode].name;
|
|
}
|
|
}
|
|
|
|
void fuse_session_process_buf(struct fuse_session *se,
|
|
const struct fuse_buf *buf)
|
|
{
|
|
struct fuse_bufvec bufv = { .buf[0] = *buf, .count = 1 };
|
|
fuse_session_process_buf_int(se, &bufv, NULL);
|
|
}
|
|
|
|
/*
|
|
* Restriction:
|
|
* bufv is normally a single entry buffer, except for a write
|
|
* where (if it's in memory) then the bufv may be multiple entries,
|
|
* where the first entry contains all headers and subsequent entries
|
|
* contain data
|
|
* bufv shall not use any offsets etc to make the data anything
|
|
* other than contiguous starting from 0.
|
|
*/
|
|
void fuse_session_process_buf_int(struct fuse_session *se,
|
|
struct fuse_bufvec *bufv,
|
|
struct fuse_chan *ch)
|
|
{
|
|
const struct fuse_buf *buf = bufv->buf;
|
|
struct fuse_mbuf_iter iter = FUSE_MBUF_ITER_INIT(buf);
|
|
struct fuse_in_header *in;
|
|
struct fuse_req *req;
|
|
int err;
|
|
|
|
/* The first buffer must be a memory buffer */
|
|
assert(!(buf->flags & FUSE_BUF_IS_FD));
|
|
|
|
in = fuse_mbuf_iter_advance(&iter, sizeof(*in));
|
|
assert(in); /* caller guarantees the input buffer is large enough */
|
|
|
|
fuse_log(
|
|
FUSE_LOG_DEBUG,
|
|
"unique: %llu, opcode: %s (%i), nodeid: %llu, insize: %zu, pid: %u\n",
|
|
(unsigned long long)in->unique, opname((enum fuse_opcode)in->opcode),
|
|
in->opcode, (unsigned long long)in->nodeid, buf->size, in->pid);
|
|
|
|
req = fuse_ll_alloc_req(se);
|
|
if (req == NULL) {
|
|
struct fuse_out_header out = {
|
|
.unique = in->unique,
|
|
.error = -ENOMEM,
|
|
};
|
|
struct iovec iov = {
|
|
.iov_base = &out,
|
|
.iov_len = sizeof(struct fuse_out_header),
|
|
};
|
|
|
|
fuse_send_msg(se, ch, &iov, 1);
|
|
return;
|
|
}
|
|
|
|
req->unique = in->unique;
|
|
req->ctx.uid = in->uid;
|
|
req->ctx.gid = in->gid;
|
|
req->ctx.pid = in->pid;
|
|
req->ch = ch;
|
|
|
|
/*
|
|
* INIT and DESTROY requests are serialized, all other request types
|
|
* run in parallel. This prevents races between FUSE_INIT and ordinary
|
|
* requests, FUSE_INIT and FUSE_INIT, FUSE_INIT and FUSE_DESTROY, and
|
|
* FUSE_DESTROY and FUSE_DESTROY.
|
|
*/
|
|
if (in->opcode == FUSE_INIT || in->opcode == CUSE_INIT ||
|
|
in->opcode == FUSE_DESTROY) {
|
|
pthread_rwlock_wrlock(&se->init_rwlock);
|
|
} else {
|
|
pthread_rwlock_rdlock(&se->init_rwlock);
|
|
}
|
|
|
|
err = EIO;
|
|
if (!se->got_init) {
|
|
enum fuse_opcode expected;
|
|
|
|
expected = se->cuse_data ? CUSE_INIT : FUSE_INIT;
|
|
if (in->opcode != expected) {
|
|
goto reply_err;
|
|
}
|
|
} else if (in->opcode == FUSE_INIT || in->opcode == CUSE_INIT) {
|
|
if (fuse_lowlevel_is_virtio(se)) {
|
|
/*
|
|
* TODO: This is after a hard reboot typically, we need to do
|
|
* a destroy, but we can't reply to this request yet so
|
|
* we can't use do_destroy
|
|
*/
|
|
fuse_log(FUSE_LOG_DEBUG, "%s: reinit\n", __func__);
|
|
se->got_destroy = 1;
|
|
se->got_init = 0;
|
|
if (se->op.destroy) {
|
|
se->op.destroy(se->userdata);
|
|
}
|
|
} else {
|
|
goto reply_err;
|
|
}
|
|
}
|
|
|
|
err = EACCES;
|
|
/* Implement -o allow_root */
|
|
if (se->deny_others && in->uid != se->owner && in->uid != 0 &&
|
|
in->opcode != FUSE_INIT && in->opcode != FUSE_READ &&
|
|
in->opcode != FUSE_WRITE && in->opcode != FUSE_FSYNC &&
|
|
in->opcode != FUSE_RELEASE && in->opcode != FUSE_READDIR &&
|
|
in->opcode != FUSE_FSYNCDIR && in->opcode != FUSE_RELEASEDIR &&
|
|
in->opcode != FUSE_NOTIFY_REPLY && in->opcode != FUSE_READDIRPLUS) {
|
|
goto reply_err;
|
|
}
|
|
|
|
err = ENOSYS;
|
|
if (in->opcode >= FUSE_MAXOP || !fuse_ll_ops[in->opcode].func) {
|
|
goto reply_err;
|
|
}
|
|
if (in->opcode != FUSE_INTERRUPT) {
|
|
struct fuse_req *intr;
|
|
pthread_mutex_lock(&se->lock);
|
|
intr = check_interrupt(se, req);
|
|
list_add_req(req, &se->list);
|
|
pthread_mutex_unlock(&se->lock);
|
|
if (intr) {
|
|
fuse_reply_err(intr, EAGAIN);
|
|
}
|
|
}
|
|
|
|
if (in->opcode == FUSE_WRITE && se->op.write_buf) {
|
|
do_write_buf(req, in->nodeid, &iter, bufv);
|
|
} else {
|
|
fuse_ll_ops[in->opcode].func(req, in->nodeid, &iter);
|
|
}
|
|
|
|
pthread_rwlock_unlock(&se->init_rwlock);
|
|
return;
|
|
|
|
reply_err:
|
|
fuse_reply_err(req, err);
|
|
pthread_rwlock_unlock(&se->init_rwlock);
|
|
}
|
|
|
|
#define LL_OPTION(n, o, v) \
|
|
{ \
|
|
n, offsetof(struct fuse_session, o), v \
|
|
}
|
|
|
|
static const struct fuse_opt fuse_ll_opts[] = {
|
|
LL_OPTION("debug", debug, 1),
|
|
LL_OPTION("-d", debug, 1),
|
|
LL_OPTION("--debug", debug, 1),
|
|
LL_OPTION("allow_root", deny_others, 1),
|
|
LL_OPTION("--socket-path=%s", vu_socket_path, 0),
|
|
LL_OPTION("--fd=%d", vu_listen_fd, 0),
|
|
LL_OPTION("--thread-pool-size=%d", thread_pool_size, 0),
|
|
FUSE_OPT_END
|
|
};
|
|
|
|
void fuse_lowlevel_version(void)
|
|
{
|
|
printf("using FUSE kernel interface version %i.%i\n", FUSE_KERNEL_VERSION,
|
|
FUSE_KERNEL_MINOR_VERSION);
|
|
}
|
|
|
|
void fuse_lowlevel_help(void)
|
|
{
|
|
/*
|
|
* These are not all options, but the ones that are
|
|
* potentially of interest to an end-user
|
|
*/
|
|
printf(
|
|
" -o allow_root allow access by root\n"
|
|
" --socket-path=PATH path for the vhost-user socket\n"
|
|
" --fd=FDNUM fd number of vhost-user socket\n"
|
|
" --thread-pool-size=NUM thread pool size limit (default %d)\n",
|
|
THREAD_POOL_SIZE);
|
|
}
|
|
|
|
void fuse_session_destroy(struct fuse_session *se)
|
|
{
|
|
if (se->got_init && !se->got_destroy) {
|
|
if (se->op.destroy) {
|
|
se->op.destroy(se->userdata);
|
|
}
|
|
}
|
|
pthread_rwlock_destroy(&se->init_rwlock);
|
|
pthread_mutex_destroy(&se->lock);
|
|
free(se->cuse_data);
|
|
if (se->fd != -1) {
|
|
close(se->fd);
|
|
}
|
|
|
|
if (fuse_lowlevel_is_virtio(se)) {
|
|
virtio_session_close(se);
|
|
}
|
|
|
|
free(se->vu_socket_path);
|
|
se->vu_socket_path = NULL;
|
|
|
|
free(se);
|
|
}
|
|
|
|
|
|
struct fuse_session *fuse_session_new(struct fuse_args *args,
|
|
const struct fuse_lowlevel_ops *op,
|
|
size_t op_size, void *userdata)
|
|
{
|
|
struct fuse_session *se;
|
|
|
|
if (sizeof(struct fuse_lowlevel_ops) < op_size) {
|
|
fuse_log(
|
|
FUSE_LOG_ERR,
|
|
"fuse: warning: library too old, some operations may not work\n");
|
|
op_size = sizeof(struct fuse_lowlevel_ops);
|
|
}
|
|
|
|
if (args->argc == 0) {
|
|
fuse_log(FUSE_LOG_ERR,
|
|
"fuse: empty argv passed to fuse_session_new().\n");
|
|
return NULL;
|
|
}
|
|
|
|
se = (struct fuse_session *)calloc(1, sizeof(struct fuse_session));
|
|
if (se == NULL) {
|
|
fuse_log(FUSE_LOG_ERR, "fuse: failed to allocate fuse object\n");
|
|
goto out1;
|
|
}
|
|
se->fd = -1;
|
|
se->vu_listen_fd = -1;
|
|
se->thread_pool_size = THREAD_POOL_SIZE;
|
|
se->conn.max_write = UINT_MAX;
|
|
se->conn.max_readahead = UINT_MAX;
|
|
|
|
/* Parse options */
|
|
if (fuse_opt_parse(args, se, fuse_ll_opts, NULL) == -1) {
|
|
goto out2;
|
|
}
|
|
if (args->argc == 1 && args->argv[0][0] == '-') {
|
|
fuse_log(FUSE_LOG_ERR,
|
|
"fuse: warning: argv[0] looks like an option, but "
|
|
"will be ignored\n");
|
|
} else if (args->argc != 1) {
|
|
int i;
|
|
fuse_log(FUSE_LOG_ERR, "fuse: unknown option(s): `");
|
|
for (i = 1; i < args->argc - 1; i++) {
|
|
fuse_log(FUSE_LOG_ERR, "%s ", args->argv[i]);
|
|
}
|
|
fuse_log(FUSE_LOG_ERR, "%s'\n", args->argv[i]);
|
|
goto out4;
|
|
}
|
|
|
|
if (!se->vu_socket_path && se->vu_listen_fd < 0) {
|
|
fuse_log(FUSE_LOG_ERR, "fuse: missing --socket-path or --fd option\n");
|
|
goto out4;
|
|
}
|
|
if (se->vu_socket_path && se->vu_listen_fd >= 0) {
|
|
fuse_log(FUSE_LOG_ERR,
|
|
"fuse: --socket-path and --fd cannot be given together\n");
|
|
goto out4;
|
|
}
|
|
|
|
se->bufsize = FUSE_MAX_MAX_PAGES * getpagesize() + FUSE_BUFFER_HEADER_SIZE;
|
|
|
|
list_init_req(&se->list);
|
|
list_init_req(&se->interrupts);
|
|
fuse_mutex_init(&se->lock);
|
|
pthread_rwlock_init(&se->init_rwlock, NULL);
|
|
|
|
memcpy(&se->op, op, op_size);
|
|
se->owner = getuid();
|
|
se->userdata = userdata;
|
|
|
|
return se;
|
|
|
|
out4:
|
|
fuse_opt_free_args(args);
|
|
out2:
|
|
free(se);
|
|
out1:
|
|
return NULL;
|
|
}
|
|
|
|
int fuse_session_mount(struct fuse_session *se)
|
|
{
|
|
return virtio_session_mount(se);
|
|
}
|
|
|
|
int fuse_session_fd(struct fuse_session *se)
|
|
{
|
|
return se->fd;
|
|
}
|
|
|
|
void fuse_session_unmount(struct fuse_session *se)
|
|
{
|
|
}
|
|
|
|
int fuse_lowlevel_is_virtio(struct fuse_session *se)
|
|
{
|
|
return !!se->virtio_dev;
|
|
}
|
|
|
|
void fuse_session_exit(struct fuse_session *se)
|
|
{
|
|
se->exited = 1;
|
|
}
|
|
|
|
void fuse_session_reset(struct fuse_session *se)
|
|
{
|
|
se->exited = 0;
|
|
se->error = 0;
|
|
}
|
|
|
|
int fuse_session_exited(struct fuse_session *se)
|
|
{
|
|
return se->exited;
|
|
}
|