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mergerfs/libfuse/lib/fuse_lowlevel.c
Antonio SJ Musumeci 18dead4d86 Add new debug printing routines
2021-10-27 22:12:10 -04:00

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/*
FUSE: Filesystem in Userspace
Copyright (C) 2001-2007 Miklos Szeredi <miklos@szeredi.hu>
This program can be distributed under the terms of the GNU LGPLv2.
See the file COPYING.LIB
*/
#define _GNU_SOURCE
#include "lfmp.h"
#include "config.h"
#include "debug.h"
#include "fuse_i.h"
#include "fuse_kernel.h"
#include "fuse_opt.h"
#include "fuse_misc.h"
#include <stdio.h>
#include <stdlib.h>
#include <stddef.h>
#include <string.h>
#include <unistd.h>
#include <limits.h>
#include <errno.h>
#include <assert.h>
#include <sys/file.h>
#ifndef F_LINUX_SPECIFIC_BASE
#define F_LINUX_SPECIFIC_BASE 1024
#endif
#ifndef F_SETPIPE_SZ
#define F_SETPIPE_SZ (F_LINUX_SPECIFIC_BASE + 7)
#endif
#define PARAM(inarg) (((char *)(inarg)) + sizeof(*(inarg)))
#define OFFSET_MAX 0x7fffffffffffffffLL
#define container_of(ptr, type, member) ({ \
const typeof( ((type *)0)->member ) *__mptr = (ptr); \
(type *)( (char *)__mptr - offsetof(type,member) );})
struct fuse_pollhandle_t
{
uint64_t kh;
struct fuse_chan *ch;
struct fuse_ll *f;
};
static size_t pagesize;
static lfmp_t g_FMP_fuse_req;
static
__attribute__((constructor))
void
fuse_ll_constructor(void)
{
pagesize = getpagesize();
lfmp_init(&g_FMP_fuse_req,sizeof(struct fuse_req),1);
}
static
__attribute__((destructor))
void
fuse_ll_destructor(void)
{
lfmp_destroy(&g_FMP_fuse_req);
}
static
void
convert_stat(const struct stat *stbuf_,
struct fuse_attr *attr_)
{
attr_->ino = stbuf_->st_ino;
attr_->mode = stbuf_->st_mode;
attr_->nlink = stbuf_->st_nlink;
attr_->uid = stbuf_->st_uid;
attr_->gid = stbuf_->st_gid;
attr_->rdev = stbuf_->st_rdev;
attr_->size = stbuf_->st_size;
attr_->blksize = stbuf_->st_blksize;
attr_->blocks = stbuf_->st_blocks;
attr_->atime = stbuf_->st_atime;
attr_->mtime = stbuf_->st_mtime;
attr_->ctime = stbuf_->st_ctime;
attr_->atimensec = ST_ATIM_NSEC(stbuf_);
attr_->mtimensec = ST_MTIM_NSEC(stbuf_);
attr_->ctimensec = ST_CTIM_NSEC(stbuf_);
}
static
void
convert_attr(const struct fuse_setattr_in *attr_,
struct stat *stbuf_)
{
stbuf_->st_mode = attr_->mode;
stbuf_->st_uid = attr_->uid;
stbuf_->st_gid = attr_->gid;
stbuf_->st_size = attr_->size;
stbuf_->st_atime = attr_->atime;
stbuf_->st_mtime = attr_->mtime;
stbuf_->st_ctime = attr_->ctime;
ST_ATIM_NSEC_SET(stbuf_,attr_->atimensec);
ST_MTIM_NSEC_SET(stbuf_,attr_->mtimensec);
ST_CTIM_NSEC_SET(stbuf_,attr_->ctimensec);
}
static
size_t
iov_length(const struct iovec *iov,
size_t count)
{
size_t seg;
size_t ret = 0;
for(seg = 0; seg < count; seg++)
ret += iov[seg].iov_len;
return ret;
}
static
void
destroy_req(fuse_req_t req)
{
lfmp_free(&g_FMP_fuse_req,req);
}
static
struct fuse_req*
fuse_ll_alloc_req(struct fuse_ll *f)
{
struct fuse_req *req;
req = (struct fuse_req*)lfmp_calloc(&g_FMP_fuse_req);
if (req == NULL)
{
fprintf(stderr, "fuse: failed to allocate request\n");
}
else
{
req->f = f;
}
return req;
}
static
int
fuse_send_msg(struct fuse_ll *f,
struct fuse_chan *ch,
struct iovec *iov,
int count)
{
struct fuse_out_header *out = iov[0].iov_base;
out->len = iov_length(iov, count);
return fuse_chan_send(ch, iov, count);
}
int
fuse_send_reply_iov_nofree(fuse_req_t req,
int error,
struct iovec *iov,
int count)
{
struct fuse_out_header out;
if (error <= -1000 || error > 0)
{
fprintf(stderr, "fuse: bad error value: %i\n",error);
error = -ERANGE;
}
out.unique = req->unique;
out.error = error;
iov[0].iov_base = &out;
iov[0].iov_len = sizeof(struct fuse_out_header);
return fuse_send_msg(req->f, req->ch, iov, count);
}
static
int
send_reply_iov(fuse_req_t req,
int error,
struct iovec *iov,
int count)
{
int res;
res = fuse_send_reply_iov_nofree(req, error, iov, count);
destroy_req(req);
return res;
}
static
int
send_reply(fuse_req_t req,
int error,
const void *arg,
size_t argsize)
{
struct iovec iov[2];
int count = 1;
if (argsize)
{
iov[1].iov_base = (void *) arg;
iov[1].iov_len = argsize;
count++;
}
return send_reply_iov(req, error, iov, count);
}
static
void
convert_statfs(const struct statvfs *stbuf,
struct fuse_kstatfs *kstatfs)
{
kstatfs->bsize = stbuf->f_bsize;
kstatfs->frsize = stbuf->f_frsize;
kstatfs->blocks = stbuf->f_blocks;
kstatfs->bfree = stbuf->f_bfree;
kstatfs->bavail = stbuf->f_bavail;
kstatfs->files = stbuf->f_files;
kstatfs->ffree = stbuf->f_ffree;
kstatfs->namelen = stbuf->f_namemax;
}
static
int
send_reply_ok(fuse_req_t req,
const void *arg,
size_t argsize)
{
return send_reply(req, 0, arg, argsize);
}
int
fuse_reply_err(fuse_req_t req_,
int err_)
{
return send_reply(req_,-err_,NULL,0);
}
void
fuse_reply_none(fuse_req_t req)
{
if (req->ch)
fuse_chan_send(req->ch, NULL, 0);
destroy_req(req);
}
static
void
fill_entry(struct fuse_entry_out *arg,
const struct fuse_entry_param *e)
{
arg->nodeid = e->ino;
arg->generation = e->generation;
arg->entry_valid = e->timeout.entry;
arg->entry_valid_nsec = 0;
arg->attr_valid = e->timeout.attr;
arg->attr_valid_nsec = 0;
convert_stat(&e->attr,&arg->attr);
}
static
void
fill_open(struct fuse_open_out *arg,
const fuse_file_info_t *f)
{
arg->fh = f->fh;
if (f->direct_io)
arg->open_flags |= FOPEN_DIRECT_IO;
if (f->keep_cache)
arg->open_flags |= FOPEN_KEEP_CACHE;
if (f->nonseekable)
arg->open_flags |= FOPEN_NONSEEKABLE;
if (f->cache_readdir)
arg->open_flags |= FOPEN_CACHE_DIR;
}
int
fuse_reply_entry(fuse_req_t req,
const struct fuse_entry_param *e)
{
struct fuse_entry_out arg = {0};
size_t size = req->f->conn.proto_minor < 9 ?
FUSE_COMPAT_ENTRY_OUT_SIZE : sizeof(arg);
/* before ABI 7.4 e->ino == 0 was invalid, only ENOENT meant
negative entry */
if (!e->ino && req->f->conn.proto_minor < 4)
return fuse_reply_err(req, ENOENT);
fill_entry(&arg, e);
return send_reply_ok(req, &arg, size);
}
int
fuse_reply_create(fuse_req_t req,
const struct fuse_entry_param *e,
const fuse_file_info_t *f)
{
char buf[sizeof(struct fuse_entry_out) + sizeof(struct fuse_open_out)] = {0};
size_t entrysize = req->f->conn.proto_minor < 9 ?
FUSE_COMPAT_ENTRY_OUT_SIZE : sizeof(struct fuse_entry_out);
struct fuse_entry_out *earg = (struct fuse_entry_out *) buf;
struct fuse_open_out *oarg = (struct fuse_open_out *) (buf + entrysize);
fill_entry(earg, e);
fill_open(oarg, f);
return send_reply_ok(req, buf, entrysize + sizeof(struct fuse_open_out));
}
int
fuse_reply_attr(fuse_req_t req,
const struct stat *attr,
const uint64_t timeout)
{
struct fuse_attr_out arg = {0};
size_t size = req->f->conn.proto_minor < 9 ?
FUSE_COMPAT_ATTR_OUT_SIZE : sizeof(arg);
arg.attr_valid = timeout;
arg.attr_valid_nsec = 0;
convert_stat(attr,&arg.attr);
return send_reply_ok(req,&arg,size);
}
int
fuse_reply_readlink(fuse_req_t req,
const char *linkname)
{
return send_reply_ok(req, linkname, strlen(linkname));
}
int
fuse_reply_open(fuse_req_t req,
const fuse_file_info_t *f)
{
struct fuse_open_out arg = {0};
fill_open(&arg, f);
return send_reply_ok(req, &arg, sizeof(arg));
}
int
fuse_reply_write(fuse_req_t req,
size_t count)
{
struct fuse_write_out arg = {0};
arg.size = count;
return send_reply_ok(req, &arg, sizeof(arg));
}
int
fuse_reply_buf(fuse_req_t req,
const char *buf,
size_t size)
{
return send_reply_ok(req, buf, size);
}
static
int
fuse_send_data_iov_fallback(struct fuse_ll *f,
struct fuse_chan *ch,
struct iovec *iov,
int iov_count,
struct fuse_bufvec *buf,
size_t len)
{
int res;
void *mbuf;
struct fuse_bufvec mem_buf = FUSE_BUFVEC_INIT(len);
/* Optimize common case */
if (buf->count == 1 && buf->idx == 0 && buf->off == 0 &&
!(buf->buf[0].flags & FUSE_BUF_IS_FD))
{
/* FIXME: also avoid memory copy if there are multiple buffers
but none of them contain an fd */
iov[iov_count].iov_base = buf->buf[0].mem;
iov[iov_count].iov_len = len;
iov_count++;
return fuse_send_msg(f, ch, iov, iov_count);
}
res = posix_memalign(&mbuf, pagesize, len);
if (res != 0)
return res;
mem_buf.buf[0].mem = mbuf;
res = fuse_buf_copy(&mem_buf, buf, 0);
if (res < 0)
{
free(mbuf);
return -res;
}
len = res;
iov[iov_count].iov_base = mbuf;
iov[iov_count].iov_len = len;
iov_count++;
res = fuse_send_msg(f, ch, iov, iov_count);
free(mbuf);
return res;
}
struct fuse_ll_pipe
{
size_t size;
int can_grow;
int pipe[2];
};
static
void
fuse_ll_pipe_free(struct fuse_ll_pipe *llp)
{
close(llp->pipe[0]);
close(llp->pipe[1]);
free(llp);
}
#ifdef HAVE_SPLICE
static
struct fuse_ll_pipe*
fuse_ll_get_pipe(struct fuse_ll *f)
{
struct fuse_ll_pipe *llp = pthread_getspecific(f->pipe_key);
if (llp == NULL)
{
int res;
llp = malloc(sizeof(struct fuse_ll_pipe));
if (llp == NULL)
return NULL;
res = pipe(llp->pipe);
if (res == -1)
{
free(llp);
return NULL;
}
if (fcntl(llp->pipe[0], F_SETFL, O_NONBLOCK) == -1 ||
fcntl(llp->pipe[1], F_SETFL, O_NONBLOCK) == -1)
{
close(llp->pipe[0]);
close(llp->pipe[1]);
free(llp);
return NULL;
}
/*
*the default size is 16 pages on linux
*/
llp->size = pagesize * 16;
llp->can_grow = 1;
pthread_setspecific(f->pipe_key, llp);
}
return llp;
}
#endif
static
void
fuse_ll_clear_pipe(struct fuse_ll *f)
{
struct fuse_ll_pipe *llp = pthread_getspecific(f->pipe_key);
if (llp)
{
pthread_setspecific(f->pipe_key, NULL);
fuse_ll_pipe_free(llp);
}
}
#if defined(HAVE_SPLICE) && defined(HAVE_VMSPLICE)
static
int
read_back(int fd,
char *buf,
size_t len)
{
int res;
res = read(fd, buf, len);
if (res == -1)
{
fprintf(stderr, "fuse: internal error: failed to read back from pipe: %s\n", strerror(errno));
return -EIO;
}
if (res != len)
{
fprintf(stderr, "fuse: internal error: short read back from pipe: %i from %zi\n", res, len);
return -EIO;
}
return 0;
}
static
int
fuse_send_data_iov(struct fuse_ll *f,
struct fuse_chan *ch,
struct iovec *iov,
int iov_count,
struct fuse_bufvec *buf,
unsigned int flags)
{
int res;
size_t len = fuse_buf_size(buf);
struct fuse_out_header *out = iov[0].iov_base;
struct fuse_ll_pipe *llp;
int splice_flags;
size_t pipesize;
size_t total_fd_size;
size_t idx;
size_t headerlen;
struct fuse_bufvec pipe_buf = FUSE_BUFVEC_INIT(len);
if (f->broken_splice_nonblock)
goto fallback;
if (flags & FUSE_BUF_NO_SPLICE)
goto fallback;
total_fd_size = 0;
for (idx = buf->idx; idx < buf->count; idx++)
{
if (buf->buf[idx].flags & FUSE_BUF_IS_FD)
{
total_fd_size = buf->buf[idx].size;
if (idx == buf->idx)
total_fd_size -= buf->off;
}
}
if (total_fd_size < 2 * pagesize)
goto fallback;
if (f->conn.proto_minor < 14 || !(f->conn.want & FUSE_CAP_SPLICE_WRITE))
goto fallback;
llp = fuse_ll_get_pipe(f);
if (llp == NULL)
goto fallback;
headerlen = iov_length(iov, iov_count);
out->len = headerlen + len;
/*
* Heuristic for the required pipe size, does not work if the
* source contains less than page size fragments
*/
pipesize = pagesize * (iov_count + buf->count + 1) + out->len;
if (llp->size < pipesize)
{
if (llp->can_grow)
{
res = fcntl(llp->pipe[0], F_SETPIPE_SZ, pipesize);
if (res == -1)
{
llp->can_grow = 0;
goto fallback;
}
llp->size = res;
}
if (llp->size < pipesize)
goto fallback;
}
res = vmsplice(llp->pipe[1], iov, iov_count, SPLICE_F_NONBLOCK);
if (res == -1)
goto fallback;
if (res != headerlen)
{
res = -EIO;
fprintf(stderr, "fuse: short vmsplice to pipe: %u/%zu\n", res,
headerlen);
goto clear_pipe;
}
pipe_buf.buf[0].flags = FUSE_BUF_IS_FD;
pipe_buf.buf[0].fd = llp->pipe[1];
res = fuse_buf_copy(&pipe_buf, buf,
FUSE_BUF_FORCE_SPLICE | FUSE_BUF_SPLICE_NONBLOCK);
if (res < 0)
{
if (res == -EAGAIN || res == -EINVAL)
{
/*
* Should only get EAGAIN on kernels with
* broken SPLICE_F_NONBLOCK support (<=
* 2.6.35) where this error or a short read is
* returned even if the pipe itself is not
* full
*
* EINVAL might mean that splice can't handle
* this combination of input and output.
*/
if (res == -EAGAIN)
f->broken_splice_nonblock = 1;
pthread_setspecific(f->pipe_key, NULL);
fuse_ll_pipe_free(llp);
goto fallback;
}
res = -res;
goto clear_pipe;
}
if (res != 0 && res < len)
{
struct fuse_bufvec mem_buf = FUSE_BUFVEC_INIT(len);
void *mbuf;
size_t now_len = res;
/*
* For regular files a short count is either
* 1) due to EOF, or
* 2) because of broken SPLICE_F_NONBLOCK (see above)
*
* For other inputs it's possible that we overflowed
* the pipe because of small buffer fragments.
*/
res = posix_memalign(&mbuf, pagesize, len);
if (res != 0)
goto clear_pipe;
mem_buf.buf[0].mem = mbuf;
mem_buf.off = now_len;
res = fuse_buf_copy(&mem_buf, buf, 0);
if (res > 0)
{
char *tmpbuf;
size_t extra_len = res;
/*
* Trickiest case: got more data. Need to get
* back the data from the pipe and then fall
* back to regular write.
*/
tmpbuf = malloc(headerlen);
if (tmpbuf == NULL)
{
free(mbuf);
res = ENOMEM;
goto clear_pipe;
}
res = read_back(llp->pipe[0], tmpbuf, headerlen);
free(tmpbuf);
if (res != 0)
{
free(mbuf);
goto clear_pipe;
}
res = read_back(llp->pipe[0], mbuf, now_len);
if (res != 0)
{
free(mbuf);
goto clear_pipe;
}
len = now_len + extra_len;
iov[iov_count].iov_base = mbuf;
iov[iov_count].iov_len = len;
iov_count++;
res = fuse_send_msg(f, ch, iov, iov_count);
free(mbuf);
return res;
}
free(mbuf);
res = now_len;
}
len = res;
out->len = headerlen + len;
splice_flags = 0;
if ((flags & FUSE_BUF_SPLICE_MOVE) &&
(f->conn.want & FUSE_CAP_SPLICE_MOVE))
splice_flags |= SPLICE_F_MOVE;
res = splice(llp->pipe[0], NULL, fuse_chan_fd(ch), NULL, out->len, splice_flags);
if (res == -1)
{
res = -errno;
perror("fuse: splice from pipe");
goto clear_pipe;
}
if (res != out->len)
{
res = -EIO;
fprintf(stderr, "fuse: short splice from pipe: %u/%u\n",
res, out->len);
goto clear_pipe;
}
return 0;
clear_pipe:
fuse_ll_clear_pipe(f);
return res;
fallback:
return fuse_send_data_iov_fallback(f, ch, iov, iov_count, buf, len);
}
#else
static
int
fuse_send_data_iov(struct fuse_ll *f,
struct fuse_chan *ch,
struct iovec *iov,
int iov_count,
struct fuse_bufvec *buf,
unsigned int flags)
{
size_t len = fuse_buf_size(buf);
(void) flags;
return fuse_send_data_iov_fallback(f, ch, iov, iov_count, buf, len);
}
#endif
int
fuse_reply_data(fuse_req_t req,
struct fuse_bufvec *bufv,
enum fuse_buf_copy_flags flags)
{
struct iovec iov[2];
struct fuse_out_header out;
int res;
iov[0].iov_base = &out;
iov[0].iov_len = sizeof(struct fuse_out_header);
out.unique = req->unique;
out.error = 0;
res = fuse_send_data_iov(req->f, req->ch, iov, 1, bufv, flags);
if (res <= 0)
{
destroy_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 = {0};
size_t size = req->f->conn.proto_minor < 4 ?
FUSE_COMPAT_STATFS_SIZE : 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 = {0};
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 = {0};
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 = {0};
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 = {0};
struct fuse_ioctl_iovec *in_fiov = NULL;
struct fuse_ioctl_iovec *out_fiov = NULL;
struct iovec iov[4];
size_t count = 1;
int res;
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++;
if (req->f->conn.proto_minor < 16)
{
if (in_count)
{
iov[count].iov_base = (void *)in_iov;
iov[count].iov_len = sizeof(in_iov[0]) * in_count;
count++;
}
if (out_count)
{
iov[count].iov_base = (void *)out_iov;
iov[count].iov_len = sizeof(out_iov[0]) * out_count;
count++;
}
}
else
{
/* 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,
uint32_t size)
{
int count;
struct iovec iov[3];
struct fuse_ioctl_out arg;
arg.result = result;
arg.flags = 0;
arg.in_iovs = 0;
arg.out_iovs = 0;
count = 1;
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 = {0};
int res;
padded_iov = malloc((count + 2) * sizeof(struct iovec));
if (padded_iov == NULL)
return fuse_reply_err(req, ENOMEM);
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 = {0};
arg.revents = revents;
return send_reply_ok(req, &arg, sizeof(arg));
}
static
void
do_lookup(fuse_req_t req,
uint64_t nodeid,
const void *inarg)
{
char *name = (char*)inarg;
req->f->op.lookup(req,nodeid,name);
}
static
void
do_forget(fuse_req_t req,
uint64_t nodeid,
const void *inarg)
{
struct fuse_forget_in *arg = (struct fuse_forget_in*)inarg;
req->f->op.forget(req,nodeid,arg->nlookup);
}
static
void
do_batch_forget(fuse_req_t req,
uint64_t nodeid,
const void *inarg)
{
struct fuse_batch_forget_in *arg = (void *) inarg;
struct fuse_forget_one *param = (void *) PARAM(arg);
(void)nodeid;
req->f->op.forget_multi(req,
arg->count,
(struct fuse_forget_data*)param);
}
static
void
do_getattr(fuse_req_t req,
uint64_t nodeid,
const void *inarg)
{
fuse_file_info_t *fip = NULL;
fuse_file_info_t fi = {0};
if(req->f->conn.proto_minor >= 9)
{
struct fuse_getattr_in *arg = (struct fuse_getattr_in*)inarg;
if(arg->getattr_flags & FUSE_GETATTR_FH)
{
fi.fh = arg->fh;
fip = &fi;
}
}
req->f->op.getattr(req, nodeid, fip);
}
static
void
do_setattr(fuse_req_t req_,
uint64_t nodeid_,
const void *inarg_)
{
struct stat stbuf = {0};
fuse_file_info_t *fi;
fuse_file_info_t fi_store;
struct fuse_setattr_in *arg;
fi = NULL;
arg = (struct fuse_setattr_in*)inarg_;
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 &=
(FATTR_MODE |
FATTR_UID |
FATTR_GID |
FATTR_SIZE |
FATTR_ATIME |
FATTR_MTIME |
FATTR_CTIME |
FATTR_ATIME_NOW |
FATTR_MTIME_NOW);
req_->f->op.setattr(req_,nodeid_,&stbuf,arg->valid,fi);
}
static
void
do_access(fuse_req_t req,
uint64_t nodeid,
const void *inarg)
{
struct fuse_access_in *arg = (struct fuse_access_in *)inarg;
req->f->op.access(req, nodeid, arg->mask);
}
static
void
do_readlink(fuse_req_t req,
uint64_t nodeid,
const void *inarg)
{
(void)inarg;
req->f->op.readlink(req, nodeid);
}
static
void
do_mknod(fuse_req_t req,
uint64_t nodeid,
const void *inarg)
{
struct fuse_mknod_in *arg = (struct fuse_mknod_in *) inarg;
char *name = PARAM(arg);
if (req->f->conn.proto_minor >= 12)
req->ctx.umask = arg->umask;
else
name = (char*)inarg + FUSE_COMPAT_MKNOD_IN_SIZE;
req->f->op.mknod(req, nodeid, name, arg->mode, arg->rdev);
}
static
void
do_mkdir(fuse_req_t req,
uint64_t nodeid,
const void *inarg)
{
struct fuse_mkdir_in *arg = (struct fuse_mkdir_in *) inarg;
if(req->f->conn.proto_minor >= 12)
req->ctx.umask = arg->umask;
req->f->op.mkdir(req, nodeid, PARAM(arg), arg->mode);
}
static
void
do_unlink(fuse_req_t req,
uint64_t nodeid,
const void *inarg)
{
char *name = (char*)inarg;
req->f->op.unlink(req,nodeid,name);
}
static
void
do_rmdir(fuse_req_t req,
uint64_t nodeid,
const void *inarg)
{
char *name = (char*)inarg;
req->f->op.rmdir(req, nodeid, name);
}
static
void
do_symlink(fuse_req_t req,
uint64_t nodeid,
const void *inarg)
{
char *name = (char*)inarg;
char *linkname = (name + strlen(name) + 1);
req->f->op.symlink(req, linkname, nodeid, name);
}
static
void
do_rename(fuse_req_t req,
uint64_t nodeid,
const void *inarg)
{
struct fuse_rename_in *arg = (struct fuse_rename_in*)inarg;
char *oldname = PARAM(arg);
char *newname = oldname + strlen(oldname) + 1;
req->f->op.rename(req, nodeid, oldname, arg->newdir, newname);
}
static
void
do_link(fuse_req_t req,
uint64_t nodeid,
const void *inarg)
{
struct fuse_link_in *arg = (struct fuse_link_in*)inarg;
req->f->op.link(req,arg->oldnodeid,nodeid,PARAM(arg));
}
static
void
do_create(fuse_req_t req,
uint64_t nodeid,
const void *inarg)
{
struct fuse_create_in *arg = (struct fuse_create_in*)inarg;
fuse_file_info_t fi = {0};
char *name = PARAM(arg);
fi.flags = arg->flags;
if (req->f->conn.proto_minor >= 12)
req->ctx.umask = arg->umask;
else
name = (char*)inarg + sizeof(struct fuse_open_in);
req->f->op.create(req, nodeid, name, arg->mode, &fi);
}
static
void
do_open(fuse_req_t req,
uint64_t nodeid,
const void *inarg)
{
fuse_file_info_t fi = {0};
struct fuse_open_in *arg = (struct fuse_open_in*)inarg;
fi.flags = arg->flags;
req->f->op.open(req, nodeid, &fi);
}
static
void
do_read(fuse_req_t req,
uint64_t nodeid,
const void *inarg)
{
fuse_file_info_t fi = {0};
struct fuse_read_in *arg = (struct fuse_read_in*)inarg;
fi.fh = arg->fh;
if (req->f->conn.proto_minor >= 9)
{
fi.lock_owner = arg->lock_owner;
fi.flags = arg->flags;
}
req->f->op.read(req, nodeid, arg->size, arg->offset, &fi);
}
static
void
do_write(fuse_req_t req,
uint64_t nodeid,
const void *inarg)
{
char *param;
fuse_file_info_t fi = {0};
struct fuse_write_in *arg = (struct fuse_write_in*)inarg;
fi.fh = arg->fh;
fi.writepage = arg->write_flags & 1;
if(req->f->conn.proto_minor < 9)
{
param = ((char*)arg) + FUSE_COMPAT_WRITE_IN_SIZE;
}
else
{
fi.lock_owner = arg->lock_owner;
fi.flags = arg->flags;
param = PARAM(arg);
}
req->f->op.write(req,nodeid,param,arg->size,arg->offset,&fi);
}
static
void
do_write_buf(fuse_req_t req,
uint64_t nodeid,
const void *inarg,
const struct fuse_buf *ibuf)
{
struct fuse_ll *f = req->f;
struct fuse_bufvec bufv = {
.buf[0] = *ibuf,
.count = 1,
};
fuse_file_info_t fi = {0};
struct fuse_write_in *arg = (struct fuse_write_in *) inarg;
fi.fh = arg->fh;
fi.writepage = arg->write_flags & 1;
if (req->f->conn.proto_minor < 9)
{
bufv.buf[0].mem = ((char *) arg) + FUSE_COMPAT_WRITE_IN_SIZE;
bufv.buf[0].size -= sizeof(struct fuse_in_header) +
FUSE_COMPAT_WRITE_IN_SIZE;
assert(!(bufv.buf[0].flags & FUSE_BUF_IS_FD));
}
else
{
fi.lock_owner = arg->lock_owner;
fi.flags = arg->flags;
if (!(bufv.buf[0].flags & FUSE_BUF_IS_FD))
bufv.buf[0].mem = PARAM(arg);
bufv.buf[0].size -= sizeof(struct fuse_in_header) +
sizeof(struct fuse_write_in);
}
if (bufv.buf[0].size < arg->size)
{
fprintf(stderr, "fuse: do_write_buf: buffer size too small\n");
fuse_reply_err(req, EIO);
goto out;
}
bufv.buf[0].size = arg->size;
req->f->op.write_buf(req, nodeid, &bufv, arg->offset, &fi);
out:
/* Need to reset the pipe if ->write_buf() didn't consume all data */
if ((ibuf->flags & FUSE_BUF_IS_FD) && bufv.idx < bufv.count)
fuse_ll_clear_pipe(f);
}
static
void
do_flush(fuse_req_t req,
uint64_t nodeid,
const void *inarg)
{
fuse_file_info_t fi = {0};
struct fuse_flush_in *arg = (struct fuse_flush_in *) inarg;
fi.fh = arg->fh;
fi.flush = 1;
if(req->f->conn.proto_minor >= 7)
fi.lock_owner = arg->lock_owner;
req->f->op.flush(req,nodeid,&fi);
}
static
void
do_release(fuse_req_t req,
uint64_t nodeid,
const void *inarg)
{
fuse_file_info_t fi = {0};
struct fuse_release_in *arg = (struct fuse_release_in*)inarg;
fi.flags = arg->flags;
fi.fh = arg->fh;
if(req->f->conn.proto_minor >= 8)
{
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;
fi.lock_owner = arg->lock_owner;
}
req->f->op.release(req,nodeid,&fi);
}
static
void
do_fsync(fuse_req_t req,
uint64_t nodeid,
const void *inarg)
{
fuse_file_info_t fi = {0};
struct fuse_fsync_in *arg = (struct fuse_fsync_in*)inarg;
fi.fh = arg->fh;
req->f->op.fsync(req,nodeid,arg->fsync_flags & 1, &fi);
}
static
void
do_opendir(fuse_req_t req,
uint64_t nodeid,
const void *inarg)
{
fuse_file_info_t fi = {0};
struct fuse_open_in *arg = (struct fuse_open_in*)inarg;
fi.flags = arg->flags;
req->f->op.opendir(req,nodeid,&fi);
}
static
void
do_readdir(fuse_req_t req,
uint64_t nodeid,
const void *inarg)
{
fuse_file_info_t fi = {0};
struct fuse_read_in *arg = (struct fuse_read_in*)inarg;
fi.fh = arg->fh;
req->f->op.readdir(req,nodeid,arg->size,arg->offset,&fi);
}
static
void
do_readdir_plus(fuse_req_t req_,
uint64_t nodeid_,
const void *inarg_)
{
const struct fuse_read_in *arg;
fuse_file_info_t ffi = {0};
arg = (struct fuse_read_in*)inarg_;
ffi.fh = arg->fh;
req_->f->op.readdir_plus(req_,nodeid_,arg->size,arg->offset,&ffi);
}
static
void
do_releasedir(fuse_req_t req,
uint64_t nodeid,
const void *inarg)
{
fuse_file_info_t fi = {0};
struct fuse_release_in *arg = (struct fuse_release_in*)inarg;
fi.flags = arg->flags;
fi.fh = arg->fh;
req->f->op.releasedir(req,nodeid,&fi);
}
static
void
do_fsyncdir(fuse_req_t req,
uint64_t nodeid,
const void *inarg)
{
fuse_file_info_t fi = {0};
struct fuse_fsync_in *arg = (struct fuse_fsync_in*)inarg;
fi.fh = arg->fh;
req->f->op.fsyncdir(req,nodeid,arg->fsync_flags & 1,&fi);
}
static
void
do_statfs(fuse_req_t req,
uint64_t nodeid,
const void *inarg)
{
(void)nodeid;
(void)inarg;
req->f->op.statfs(req, nodeid);
}
static
void
do_setxattr(fuse_req_t req,
uint64_t nodeid,
const void *inarg)
{
struct fuse_setxattr_in *arg = (struct fuse_setxattr_in*)inarg;
char *name = PARAM(arg);
char *value = name + strlen(name) + 1;
req->f->op.setxattr(req, nodeid, name, value, arg->size, arg->flags);
}
static
void
do_getxattr(fuse_req_t req,
uint64_t nodeid,
const void *inarg)
{
struct fuse_getxattr_in *arg = (struct fuse_getxattr_in*)inarg;
req->f->op.getxattr(req, nodeid, PARAM(arg), arg->size);
}
static
void
do_listxattr(fuse_req_t req,
uint64_t nodeid,
const void *inarg)
{
struct fuse_getxattr_in *arg = (struct fuse_getxattr_in*)inarg;
req->f->op.listxattr(req, nodeid, arg->size);
}
static
void
do_removexattr(fuse_req_t req,
uint64_t nodeid,
const void *inarg)
{
char *name = (char *) inarg;
req->f->op.removexattr(req, nodeid, name);
}
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,
uint64_t nodeid,
const void *inarg)
{
fuse_file_info_t fi = {0};
struct flock flock;
struct fuse_lk_in *arg = (struct fuse_lk_in*)inarg;
fi.fh = arg->fh;
fi.lock_owner = arg->owner;
convert_fuse_file_lock(&arg->lk, &flock);
req->f->op.getlk(req, nodeid, &fi, &flock);
}
static
void
do_setlk_common(fuse_req_t req,
uint64_t nodeid,
const void *inarg,
int sleep)
{
struct flock flock;
fuse_file_info_t fi = {0};
struct fuse_lk_in *arg = (struct fuse_lk_in *) inarg;
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;
req->f->op.flock(req,nodeid,&fi,op);
}
else
{
convert_fuse_file_lock(&arg->lk, &flock);
req->f->op.setlk(req,nodeid,&fi,&flock,sleep);
}
}
static
void
do_setlk(fuse_req_t req,
uint64_t nodeid,
const void *inarg)
{
do_setlk_common(req, nodeid, inarg, 0);
}
static
void
do_setlkw(fuse_req_t req,
uint64_t nodeid,
const void *inarg)
{
do_setlk_common(req, nodeid, inarg, 1);
}
static
void
do_interrupt(fuse_req_t req,
uint64_t nodeid,
const void *inarg)
{
destroy_req(req);
}
static
void
do_bmap(fuse_req_t req,
uint64_t nodeid,
const void *inarg)
{
struct fuse_bmap_in *arg = (struct fuse_bmap_in*)inarg;
req->f->op.bmap(req,nodeid,arg->blocksize,arg->block);
}
static
void
do_ioctl(fuse_req_t req,
uint64_t nodeid,
const void *inarg)
{
fuse_file_info_t fi = {0};
struct fuse_ioctl_in *arg = (struct fuse_ioctl_in *) inarg;
unsigned int flags = arg->flags;
void *in_buf = arg->in_size ? PARAM(arg) : NULL;
if((flags & FUSE_IOCTL_DIR) && !(req->f->conn.want & FUSE_CAP_IOCTL_DIR))
{
fuse_reply_err(req,ENOTTY);
return;
}
fi.fh = arg->fh;
if((sizeof(void *) == 4) &&
(req->f->conn.proto_minor >= 16) &&
!(flags & FUSE_IOCTL_32BIT))
{
req->ioctl_64bit = 1;
}
req->f->op.ioctl(req, nodeid, (unsigned long)arg->cmd,
(void *)(uintptr_t)arg->arg, &fi, flags,
in_buf, arg->in_size, arg->out_size);
}
void
fuse_pollhandle_destroy(fuse_pollhandle_t *ph)
{
free(ph);
}
static
void
do_poll(fuse_req_t req,
uint64_t nodeid,
const void *inarg)
{
fuse_file_info_t fi = {0};
fuse_pollhandle_t *ph = NULL;
struct fuse_poll_in *arg = (struct fuse_poll_in *) inarg;
fi.fh = arg->fh;
if(arg->flags & FUSE_POLL_SCHEDULE_NOTIFY)
{
ph = malloc(sizeof(fuse_pollhandle_t));
if (ph == NULL) {
fuse_reply_err(req, ENOMEM);
return;
}
ph->kh = arg->kh;
ph->ch = req->ch;
ph->f = req->f;
}
req->f->op.poll(req,nodeid,&fi,ph);
}
static
void
do_fallocate(fuse_req_t req,
uint64_t nodeid,
const void *inarg)
{
fuse_file_info_t fi = {0};
struct fuse_fallocate_in *arg = (struct fuse_fallocate_in *) inarg;
fi.fh = arg->fh;
req->f->op.fallocate(req, nodeid, arg->mode, arg->offset, arg->length, &fi);
}
static
void
do_init(fuse_req_t req,
uint64_t nodeid,
const void *inarg)
{
struct fuse_init_out outarg = {0};
struct fuse_init_in *arg = (struct fuse_init_in *) inarg;
struct fuse_ll *f = req->f;
size_t bufsize = fuse_chan_bufsize(req->ch);
(void)nodeid;
if(f->debug)
debug_fuse_init_in(arg);
f->conn.proto_major = arg->major;
f->conn.proto_minor = arg->minor;
f->conn.capable = 0;
f->conn.want = 0;
outarg.major = FUSE_KERNEL_VERSION;
outarg.minor = FUSE_KERNEL_MINOR_VERSION;
outarg.max_pages = FUSE_DEFAULT_MAX_PAGES_PER_REQ;
if (arg->major < 7)
{
fprintf(stderr, "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->minor >= 6)
{
if (arg->max_readahead < f->conn.max_readahead)
f->conn.max_readahead = arg->max_readahead;
if (arg->flags & FUSE_ASYNC_READ)
f->conn.capable |= FUSE_CAP_ASYNC_READ;
if (arg->flags & FUSE_POSIX_LOCKS)
f->conn.capable |= FUSE_CAP_POSIX_LOCKS;
if (arg->flags & FUSE_ATOMIC_O_TRUNC)
f->conn.capable |= FUSE_CAP_ATOMIC_O_TRUNC;
if (arg->flags & FUSE_EXPORT_SUPPORT)
f->conn.capable |= FUSE_CAP_EXPORT_SUPPORT;
if (arg->flags & FUSE_BIG_WRITES)
f->conn.capable |= FUSE_CAP_BIG_WRITES;
if (arg->flags & FUSE_DONT_MASK)
f->conn.capable |= FUSE_CAP_DONT_MASK;
if (arg->flags & FUSE_FLOCK_LOCKS)
f->conn.capable |= FUSE_CAP_FLOCK_LOCKS;
if (arg->flags & FUSE_POSIX_ACL)
f->conn.capable |= FUSE_CAP_POSIX_ACL;
if (arg->flags & FUSE_CACHE_SYMLINKS)
f->conn.capable |= FUSE_CAP_CACHE_SYMLINKS;
if (arg->flags & FUSE_ASYNC_DIO)
f->conn.capable |= FUSE_CAP_ASYNC_DIO;
if (arg->flags & FUSE_PARALLEL_DIROPS)
f->conn.capable |= FUSE_CAP_PARALLEL_DIROPS;
if (arg->flags & FUSE_MAX_PAGES)
f->conn.capable |= FUSE_CAP_MAX_PAGES;
if (arg->flags & FUSE_WRITEBACK_CACHE)
f->conn.capable |= FUSE_CAP_WRITEBACK_CACHE;
if (arg->flags & FUSE_DO_READDIRPLUS)
f->conn.capable |= FUSE_CAP_READDIR_PLUS;
if (arg->flags & FUSE_READDIRPLUS_AUTO)
f->conn.capable |= FUSE_CAP_READDIR_PLUS_AUTO;
}
else
{
f->conn.want &= ~FUSE_CAP_ASYNC_READ;
f->conn.max_readahead = 0;
}
if (req->f->conn.proto_minor >= 14)
{
#ifdef HAVE_SPLICE
#ifdef HAVE_VMSPLICE
f->conn.capable |= FUSE_CAP_SPLICE_WRITE | FUSE_CAP_SPLICE_MOVE;
if (f->splice_write)
f->conn.want |= FUSE_CAP_SPLICE_WRITE;
if (f->splice_move)
f->conn.want |= FUSE_CAP_SPLICE_MOVE;
#endif
f->conn.capable |= FUSE_CAP_SPLICE_READ;
if (f->splice_read)
f->conn.want |= FUSE_CAP_SPLICE_READ;
#endif
}
if (req->f->conn.proto_minor >= 18)
f->conn.capable |= FUSE_CAP_IOCTL_DIR;
if (f->op.getlk && f->op.setlk && !f->no_remote_posix_lock)
f->conn.want |= FUSE_CAP_POSIX_LOCKS;
if (f->op.flock && !f->no_remote_flock)
f->conn.want |= FUSE_CAP_FLOCK_LOCKS;
if (bufsize < FUSE_MIN_READ_BUFFER)
{
fprintf(stderr, "fuse: warning: buffer size too small: %zu\n",
bufsize);
bufsize = FUSE_MIN_READ_BUFFER;
}
bufsize -= 4096;
if (bufsize < f->conn.max_write)
f->conn.max_write = bufsize;
f->got_init = 1;
if (f->op.init)
f->op.init(f->userdata, &f->conn);
if (f->no_splice_read)
f->conn.want &= ~FUSE_CAP_SPLICE_READ;
if (f->no_splice_write)
f->conn.want &= ~FUSE_CAP_SPLICE_WRITE;
if (f->no_splice_move)
f->conn.want &= ~FUSE_CAP_SPLICE_MOVE;
if ((arg->flags & FUSE_MAX_PAGES) && (f->conn.want & FUSE_CAP_MAX_PAGES))
{
outarg.flags |= FUSE_MAX_PAGES;
outarg.max_pages = f->conn.max_pages;
}
if (f->conn.want & FUSE_CAP_ASYNC_READ)
outarg.flags |= FUSE_ASYNC_READ;
if (f->conn.want & FUSE_CAP_POSIX_LOCKS)
outarg.flags |= FUSE_POSIX_LOCKS;
if (f->conn.want & FUSE_CAP_ATOMIC_O_TRUNC)
outarg.flags |= FUSE_ATOMIC_O_TRUNC;
if (f->conn.want & FUSE_CAP_EXPORT_SUPPORT)
outarg.flags |= FUSE_EXPORT_SUPPORT;
if (f->conn.want & FUSE_CAP_BIG_WRITES)
outarg.flags |= FUSE_BIG_WRITES;
if (f->conn.want & FUSE_CAP_DONT_MASK)
outarg.flags |= FUSE_DONT_MASK;
if (f->conn.want & FUSE_CAP_FLOCK_LOCKS)
outarg.flags |= FUSE_FLOCK_LOCKS;
if (f->conn.want & FUSE_CAP_POSIX_ACL)
outarg.flags |= FUSE_POSIX_ACL;
if (f->conn.want & FUSE_CAP_CACHE_SYMLINKS)
outarg.flags |= FUSE_CACHE_SYMLINKS;
if (f->conn.want & FUSE_CAP_ASYNC_DIO)
outarg.flags |= FUSE_ASYNC_DIO;
if (f->conn.want & FUSE_CAP_PARALLEL_DIROPS)
outarg.flags |= FUSE_PARALLEL_DIROPS;
if (f->conn.want & FUSE_CAP_WRITEBACK_CACHE)
outarg.flags |= FUSE_WRITEBACK_CACHE;
if (f->conn.want & FUSE_CAP_READDIR_PLUS)
outarg.flags |= FUSE_DO_READDIRPLUS;
if (f->conn.want & FUSE_CAP_READDIR_PLUS_AUTO)
outarg.flags |= FUSE_READDIRPLUS_AUTO;
outarg.max_readahead = f->conn.max_readahead;
outarg.max_write = f->conn.max_write;
if (f->conn.proto_minor >= 13)
{
if (f->conn.max_background >= (1 << 16))
f->conn.max_background = (1 << 16) - 1;
if (f->conn.congestion_threshold > f->conn.max_background)
f->conn.congestion_threshold = f->conn.max_background;
if (!f->conn.congestion_threshold)
{
f->conn.congestion_threshold = f->conn.max_background * 3 / 4;
}
outarg.max_background = f->conn.max_background;
outarg.congestion_threshold = f->conn.congestion_threshold;
}
size_t outargsize;
if(arg->minor < 5)
outargsize = FUSE_COMPAT_INIT_OUT_SIZE;
else if(arg->minor < 23)
outargsize = FUSE_COMPAT_22_INIT_OUT_SIZE;
else
outargsize = sizeof(outarg);
if(f->debug)
debug_fuse_init_out(req->unique,&outarg,outargsize);
send_reply_ok(req, &outarg, outargsize);
}
static
void
do_destroy(fuse_req_t req,
uint64_t nodeid,
const void *inarg)
{
struct fuse_ll *f = req->f;
(void) nodeid;
(void) inarg;
f->got_destroy = 1;
f->op.destroy(f->userdata);
send_reply_ok(req,NULL,0);
}
static
void
list_del_nreq(struct fuse_notify_req *nreq)
{
struct fuse_notify_req *prev = nreq->prev;
struct fuse_notify_req *next = nreq->next;
prev->next = next;
next->prev = prev;
}
static
void
list_add_nreq(struct fuse_notify_req *nreq,
struct fuse_notify_req *next)
{
struct fuse_notify_req *prev = next->prev;
nreq->next = next;
nreq->prev = prev;
prev->next = nreq;
next->prev = nreq;
}
static
void
list_init_nreq(struct fuse_notify_req *nreq)
{
nreq->next = nreq;
nreq->prev = nreq;
}
static
void
do_notify_reply(fuse_req_t req,
uint64_t nodeid,
const void *inarg,
const struct fuse_buf *buf)
{
struct fuse_ll *f = req->f;
struct fuse_notify_req *nreq;
struct fuse_notify_req *head;
pthread_mutex_lock(&f->lock);
head = &f->notify_list;
for (nreq = head->next; nreq != head; nreq = nreq->next)
{
if (nreq->unique == req->unique)
{
list_del_nreq(nreq);
break;
}
}
pthread_mutex_unlock(&f->lock);
if (nreq != head)
nreq->reply(nreq, req, nodeid, inarg, buf);
}
static
void
do_copy_file_range(fuse_req_t req_,
uint64_t nodeid_in_,
const void *arg_)
{
fuse_file_info_t ffi_in = {0};
fuse_file_info_t ffi_out = {0};
struct fuse_copy_file_range_in *arg = (struct fuse_copy_file_range_in*)arg_;
ffi_in.fh = arg->fh_in;
ffi_out.fh = arg->fh_out;
req_->f->op.copy_file_range(req_,
nodeid_in_,
arg->off_in,
&ffi_in,
arg->nodeid_out,
arg->off_out,
&ffi_out,
arg->len,
arg->flags);
}
static
int
send_notify_iov(struct fuse_ll *f,
struct fuse_chan *ch,
int notify_code,
struct iovec *iov,
int count)
{
struct fuse_out_header out;
if (!f->got_init)
return -ENOTCONN;
out.unique = 0;
out.error = notify_code;
iov[0].iov_base = &out;
iov[0].iov_len = sizeof(struct fuse_out_header);
return fuse_send_msg(f, ch, iov, count);
}
int
fuse_lowlevel_notify_poll(fuse_pollhandle_t *ph)
{
if (ph != NULL)
{
struct fuse_notify_poll_wakeup_out outarg;
struct iovec iov[2];
outarg.kh = ph->kh;
iov[1].iov_base = &outarg;
iov[1].iov_len = sizeof(outarg);
return send_notify_iov(ph->f, ph->ch, FUSE_NOTIFY_POLL, iov, 2);
}
else
{
return 0;
}
}
int
fuse_lowlevel_notify_inval_inode(struct fuse_chan *ch,
uint64_t ino,
off_t off,
off_t len)
{
struct fuse_notify_inval_inode_out outarg;
struct fuse_ll *f;
struct iovec iov[2];
if (!ch)
return -EINVAL;
f = (struct fuse_ll *)fuse_session_data(fuse_chan_session(ch));
if (!f)
return -ENODEV;
outarg.ino = ino;
outarg.off = off;
outarg.len = len;
iov[1].iov_base = &outarg;
iov[1].iov_len = sizeof(outarg);
return send_notify_iov(f, ch, FUSE_NOTIFY_INVAL_INODE, iov, 2);
}
int
fuse_lowlevel_notify_inval_entry(struct fuse_chan *ch,
uint64_t parent,
const char *name,
size_t namelen)
{
struct fuse_notify_inval_entry_out outarg;
struct fuse_ll *f;
struct iovec iov[3];
if (!ch)
return -EINVAL;
f = (struct fuse_ll *)fuse_session_data(fuse_chan_session(ch));
if (!f)
return -ENODEV;
outarg.parent = parent;
outarg.namelen = namelen;
outarg.padding = 0;
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(f, ch, FUSE_NOTIFY_INVAL_ENTRY, iov, 3);
}
int
fuse_lowlevel_notify_delete(struct fuse_chan *ch,
uint64_t parent,
uint64_t child,
const char *name,
size_t namelen)
{
struct fuse_notify_delete_out outarg;
struct fuse_ll *f;
struct iovec iov[3];
if (!ch)
return -EINVAL;
f = (struct fuse_ll *)fuse_session_data(fuse_chan_session(ch));
if (!f)
return -ENODEV;
if (f->conn.proto_minor < 18)
return -ENOSYS;
outarg.parent = parent;
outarg.child = child;
outarg.namelen = namelen;
outarg.padding = 0;
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(f, ch, FUSE_NOTIFY_DELETE, iov, 3);
}
int
fuse_lowlevel_notify_store(struct fuse_chan *ch,
uint64_t ino,
off_t offset,
struct fuse_bufvec *bufv,
enum fuse_buf_copy_flags flags)
{
struct fuse_out_header out;
struct fuse_notify_store_out outarg;
struct fuse_ll *f;
struct iovec iov[3];
size_t size = fuse_buf_size(bufv);
int res;
if (!ch)
return -EINVAL;
f = (struct fuse_ll *)fuse_session_data(fuse_chan_session(ch));
if (!f)
return -ENODEV;
if (f->conn.proto_minor < 15)
return -ENOSYS;
out.unique = 0;
out.error = FUSE_NOTIFY_STORE;
outarg.nodeid = ino;
outarg.offset = offset;
outarg.size = size;
outarg.padding = 0;
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(f, ch, iov, 2, bufv, flags);
if (res > 0)
res = -res;
return res;
}
struct fuse_retrieve_req
{
struct fuse_notify_req nreq;
void *cookie;
};
static
void
fuse_ll_retrieve_reply(struct fuse_notify_req *nreq,
fuse_req_t req,
uint64_t ino,
const void *inarg,
const struct fuse_buf *ibuf)
{
struct fuse_ll *f = req->f;
struct fuse_retrieve_req *rreq =
container_of(nreq, struct fuse_retrieve_req, nreq);
const struct fuse_notify_retrieve_in *arg = inarg;
struct fuse_bufvec bufv = {
.buf[0] = *ibuf,
.count = 1,
};
if (!(bufv.buf[0].flags & FUSE_BUF_IS_FD))
bufv.buf[0].mem = PARAM(arg);
bufv.buf[0].size -= sizeof(struct fuse_in_header) +
sizeof(struct fuse_notify_retrieve_in);
if (bufv.buf[0].size < arg->size)
{
fprintf(stderr, "fuse: retrieve reply: buffer size too small\n");
fuse_reply_none(req);
goto out;
}
bufv.buf[0].size = arg->size;
if (req->f->op.retrieve_reply)
{
req->f->op.retrieve_reply(req, rreq->cookie, ino,
arg->offset, &bufv);
}
else
{
fuse_reply_none(req);
}
out:
free(rreq);
if ((ibuf->flags & FUSE_BUF_IS_FD) && bufv.idx < bufv.count)
fuse_ll_clear_pipe(f);
}
int
fuse_lowlevel_notify_retrieve(struct fuse_chan *ch,
uint64_t ino,
size_t size,
off_t offset,
void *cookie)
{
struct fuse_notify_retrieve_out outarg;
struct fuse_ll *f;
struct iovec iov[2];
struct fuse_retrieve_req *rreq;
int err;
if (!ch)
return -EINVAL;
f = (struct fuse_ll *)fuse_session_data(fuse_chan_session(ch));
if (!f)
return -ENODEV;
if (f->conn.proto_minor < 15)
return -ENOSYS;
rreq = malloc(sizeof(*rreq));
if (rreq == NULL)
return -ENOMEM;
pthread_mutex_lock(&f->lock);
rreq->cookie = cookie;
rreq->nreq.unique = f->notify_ctr++;
rreq->nreq.reply = fuse_ll_retrieve_reply;
list_add_nreq(&rreq->nreq, &f->notify_list);
pthread_mutex_unlock(&f->lock);
outarg.notify_unique = rreq->nreq.unique;
outarg.nodeid = ino;
outarg.offset = offset;
outarg.size = size;
iov[1].iov_base = &outarg;
iov[1].iov_len = sizeof(outarg);
err = send_notify_iov(f, ch, FUSE_NOTIFY_RETRIEVE, iov, 2);
if (err)
{
pthread_mutex_lock(&f->lock);
list_del_nreq(&rreq->nreq);
pthread_mutex_unlock(&f->lock);
free(rreq);
}
return err;
}
void *
fuse_req_userdata(fuse_req_t req)
{
return req->f->userdata;
}
const
struct fuse_ctx *
fuse_req_ctx(fuse_req_t req)
{
return &req->ctx;
}
static struct {
void (*func)(fuse_req_t, uint64_t, const void *);
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_READDIRPLUS] = { do_readdir_plus, "READDIR_PLUS" },
[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] = { (void *) 1, "NOTIFY_REPLY" },
[FUSE_BATCH_FORGET] = { do_batch_forget, "BATCH_FORGET" },
[FUSE_COPY_FILE_RANGE] = { do_copy_file_range, "COPY_FILE_RANGE" },
};
#define FUSE_MAXOP (sizeof(fuse_ll_ops) / sizeof(fuse_ll_ops[0]))
static
int
fuse_ll_copy_from_pipe(struct fuse_bufvec *dst,
struct fuse_bufvec *src)
{
int res = fuse_buf_copy(dst, src, 0);
if (res < 0)
{
fprintf(stderr, "fuse: copy from pipe: %s\n", strerror(-res));
return res;
}
if (res < fuse_buf_size(dst))
{
fprintf(stderr, "fuse: copy from pipe: short read\n");
return -1;
}
return 0;
}
static
void
fuse_ll_process_buf(void *data,
const struct fuse_buf *buf,
struct fuse_chan *ch)
{
struct fuse_ll *f = (struct fuse_ll *) data;
const size_t write_header_size = sizeof(struct fuse_in_header) +
sizeof(struct fuse_write_in);
struct fuse_bufvec bufv = { .buf[0] = *buf, .count = 1 };
struct fuse_bufvec tmpbuf = FUSE_BUFVEC_INIT(write_header_size);
struct fuse_in_header *in;
const void *inarg;
struct fuse_req *req;
void *mbuf = NULL;
int err;
int res;
if (buf->flags & FUSE_BUF_IS_FD)
{
if (buf->size < tmpbuf.buf[0].size)
tmpbuf.buf[0].size = buf->size;
mbuf = malloc(tmpbuf.buf[0].size);
if (mbuf == NULL)
{
fprintf(stderr, "fuse: failed to allocate header\n");
goto clear_pipe;
}
tmpbuf.buf[0].mem = mbuf;
res = fuse_ll_copy_from_pipe(&tmpbuf, &bufv);
if (res < 0)
goto clear_pipe;
in = mbuf;
}
else
{
in = buf->mem;
}
req = fuse_ll_alloc_req(f);
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(f, ch, &iov, 1);
goto clear_pipe;
}
req->unique = in->unique;
req->ctx.uid = in->uid;
req->ctx.gid = in->gid;
req->ctx.pid = in->pid;
req->ch = ch;
err = EIO;
if(!f->got_init)
{
enum fuse_opcode expected;
expected = FUSE_INIT;
if (in->opcode != expected)
goto reply_err;
}
else if(in->opcode == FUSE_INIT)
{
goto reply_err;
}
err = ENOSYS;
if (in->opcode >= FUSE_MAXOP || !fuse_ll_ops[in->opcode].func)
goto reply_err;
if ((buf->flags & FUSE_BUF_IS_FD) && write_header_size < buf->size &&
(in->opcode != FUSE_WRITE || !f->op.write_buf) &&
in->opcode != FUSE_NOTIFY_REPLY)
{
void *newmbuf;
err = ENOMEM;
newmbuf = realloc(mbuf, buf->size);
if (newmbuf == NULL)
goto reply_err;
mbuf = newmbuf;
tmpbuf = FUSE_BUFVEC_INIT(buf->size - write_header_size);
tmpbuf.buf[0].mem = mbuf + write_header_size;
res = fuse_ll_copy_from_pipe(&tmpbuf, &bufv);
err = -res;
if (res < 0)
goto reply_err;
in = mbuf;
}
inarg = (void *) &in[1];
if (in->opcode == FUSE_WRITE)
do_write_buf(req, in->nodeid, inarg, buf);
else if (in->opcode == FUSE_NOTIFY_REPLY)
do_notify_reply(req, in->nodeid, inarg, buf);
else
fuse_ll_ops[in->opcode].func(req, in->nodeid, inarg);
out_free:
free(mbuf);
return;
reply_err:
fuse_reply_err(req, err);
clear_pipe:
if (buf->flags & FUSE_BUF_IS_FD)
fuse_ll_clear_pipe(f);
goto out_free;
}
static
void
fuse_ll_process(void *data,
const char *buf,
size_t len,
struct fuse_chan *ch)
{
struct fuse_buf fbuf = {
.mem = (void *) buf,
.size = len,
};
fuse_ll_process_buf(data, &fbuf, ch);
}
enum {
KEY_HELP,
KEY_VERSION,
};
static const struct fuse_opt fuse_ll_opts[] =
{
{ "debug", offsetof(struct fuse_ll, debug), 1 },
{ "-d", offsetof(struct fuse_ll, debug), 1 },
{ "max_readahead=%u", offsetof(struct fuse_ll, conn.max_readahead), 0 },
{ "max_background=%u", offsetof(struct fuse_ll, conn.max_background), 0 },
{ "congestion_threshold=%u",
offsetof(struct fuse_ll, conn.congestion_threshold), 0 },
{ "no_remote_lock", offsetof(struct fuse_ll, no_remote_posix_lock), 1},
{ "no_remote_lock", offsetof(struct fuse_ll, no_remote_flock), 1},
{ "no_remote_flock", offsetof(struct fuse_ll, no_remote_flock), 1},
{ "no_remote_posix_lock", offsetof(struct fuse_ll, no_remote_posix_lock), 1},
{ "splice_write", offsetof(struct fuse_ll, splice_write), 1},
{ "no_splice_write", offsetof(struct fuse_ll, no_splice_write), 1},
{ "splice_move", offsetof(struct fuse_ll, splice_move), 1},
{ "no_splice_move", offsetof(struct fuse_ll, no_splice_move), 1},
{ "splice_read", offsetof(struct fuse_ll, splice_read), 1},
{ "no_splice_read", offsetof(struct fuse_ll, no_splice_read), 1},
FUSE_OPT_KEY("max_read=", FUSE_OPT_KEY_DISCARD),
FUSE_OPT_KEY("-h", KEY_HELP),
FUSE_OPT_KEY("--help", KEY_HELP),
FUSE_OPT_KEY("-V", KEY_VERSION),
FUSE_OPT_KEY("--version", KEY_VERSION),
FUSE_OPT_END
};
static
void
fuse_ll_version(void)
{
fprintf(stderr, "using FUSE kernel interface version %i.%i\n",
FUSE_KERNEL_VERSION, FUSE_KERNEL_MINOR_VERSION);
}
static
void
fuse_ll_help(void)
{
fprintf(stderr,
" -o max_readahead=N set maximum readahead\n"
" -o max_background=N set number of maximum background requests\n"
" -o congestion_threshold=N set kernel's congestion threshold\n"
" -o no_remote_lock disable remote file locking\n"
" -o no_remote_flock disable remote file locking (BSD)\n"
" -o no_remote_posix_lock disable remove file locking (POSIX)\n"
" -o [no_]splice_write use splice to write to the fuse device\n"
" -o [no_]splice_move move data while splicing to the fuse device\n"
" -o [no_]splice_read use splice to read from the fuse device\n"
);
}
static
int
fuse_ll_opt_proc(void *data,
const char *arg,
int key,
struct fuse_args *outargs)
{
(void) data; (void) outargs;
switch (key)
{
case KEY_HELP:
fuse_ll_help();
break;
case KEY_VERSION:
fuse_ll_version();
break;
default:
fprintf(stderr, "fuse: unknown option `%s'\n", arg);
}
return -1;
}
int
fuse_lowlevel_is_lib_option(const char *opt)
{
return fuse_opt_match(fuse_ll_opts, opt);
}
static
void
fuse_ll_destroy(void *data)
{
struct fuse_ll *f = (struct fuse_ll *) data;
struct fuse_ll_pipe *llp;
if (f->got_init && !f->got_destroy)
{
if (f->op.destroy)
f->op.destroy(f->userdata);
}
llp = pthread_getspecific(f->pipe_key);
if (llp != NULL)
fuse_ll_pipe_free(llp);
pthread_key_delete(f->pipe_key);
pthread_mutex_destroy(&f->lock);
free(f);
lfmp_clear(&g_FMP_fuse_req);
}
static
void
fuse_ll_pipe_destructor(void *data)
{
struct fuse_ll_pipe *llp = data;
fuse_ll_pipe_free(llp);
}
#ifdef HAVE_SPLICE
static
int
fuse_ll_receive_buf(struct fuse_session *se,
struct fuse_buf *buf,
struct fuse_chan **chp)
{
struct fuse_chan *ch = *chp;
struct fuse_ll *f = fuse_session_data(se);
size_t bufsize = buf->size;
struct fuse_ll_pipe *llp;
struct fuse_buf tmpbuf;
int err;
int res;
if (f->conn.proto_minor < 14 || !(f->conn.want & FUSE_CAP_SPLICE_READ))
goto fallback;
llp = fuse_ll_get_pipe(f);
if (llp == NULL)
goto fallback;
if (llp->size < bufsize)
{
if (llp->can_grow)
{
res = fcntl(llp->pipe[0], F_SETPIPE_SZ, bufsize);
if (res == -1)
{
llp->can_grow = 0;
goto fallback;
}
llp->size = res;
}
if (llp->size < bufsize)
goto fallback;
}
res = splice(fuse_chan_fd(ch), NULL, llp->pipe[1], NULL, bufsize, 0);
err = errno;
if(fuse_session_exited(se))
return 0;
if (res == -1)
{
if (err == ENODEV)
{
fuse_session_exit(se);
return 0;
}
if (err != EINTR && err != EAGAIN)
perror("fuse: splice from device");
return -err;
}
if (res < sizeof(struct fuse_in_header))
{
fprintf(stderr, "short splice from fuse device\n");
return -EIO;
}
tmpbuf = (struct fuse_buf) {
.size = res,
.flags = FUSE_BUF_IS_FD,
.fd = llp->pipe[0],
};
/*
* Don't bother with zero copy for small requests.
* fuse_loop_mt() needs to check for FORGET so this more than
* just an optimization.
*/
if (res < sizeof(struct fuse_in_header) +
sizeof(struct fuse_write_in) + pagesize)
{
struct fuse_bufvec src = { .buf[0] = tmpbuf, .count = 1 };
struct fuse_bufvec dst = { .buf[0] = *buf, .count = 1 };
res = fuse_buf_copy(&dst, &src, 0);
if (res < 0) {
fprintf(stderr, "fuse: copy from pipe: %s\n",
strerror(-res));
fuse_ll_clear_pipe(f);
return res;
}
if (res < tmpbuf.size)
{
fprintf(stderr, "fuse: copy from pipe: short read\n");
fuse_ll_clear_pipe(f);
return -EIO;
}
buf->size = tmpbuf.size;
return buf->size;
}
*buf = tmpbuf;
return res;
fallback:
res = fuse_chan_recv(chp, buf->mem, bufsize);
if (res <= 0)
return res;
buf->size = res;
return res;
}
#else
static
int
fuse_ll_receive_buf(struct fuse_session *se,
struct fuse_buf *buf,
struct fuse_chan **chp)
{
(void) se;
int res = fuse_chan_recv(chp, buf->mem, buf->size);
if (res <= 0)
return res;
buf->size = res;
return res;
}
#endif
/*
* always call fuse_lowlevel_new_common() internally, to work around a
* misfeature in the FreeBSD runtime linker, which links the old
* version of a symbol to internal references.
*/
struct fuse_session *
fuse_lowlevel_new_common(struct fuse_args *args,
const struct fuse_lowlevel_ops *op,
size_t op_size,
void *userdata)
{
int err;
struct fuse_ll *f;
struct fuse_session *se;
struct fuse_session_ops sop = {
.process = fuse_ll_process,
.destroy = fuse_ll_destroy,
};
if (sizeof(struct fuse_lowlevel_ops) < op_size)
{
fprintf(stderr, "fuse: warning: library too old, some operations may not work\n");
op_size = sizeof(struct fuse_lowlevel_ops);
}
f = (struct fuse_ll *) calloc(1, sizeof(struct fuse_ll));
if (f == NULL)
{
fprintf(stderr, "fuse: failed to allocate fuse object\n");
goto out;
}
f->conn.max_write = UINT_MAX;
f->conn.max_readahead = UINT_MAX;
list_init_nreq(&f->notify_list);
f->notify_ctr = 1;
fuse_mutex_init(&f->lock);
err = pthread_key_create(&f->pipe_key, fuse_ll_pipe_destructor);
if (err)
{
fprintf(stderr, "fuse: failed to create thread specific key: %s\n",
strerror(err));
goto out_free;
}
if (fuse_opt_parse(args, f, fuse_ll_opts, fuse_ll_opt_proc) == -1)
goto out_key_destroy;
memcpy(&f->op, op, op_size);
f->owner = getuid();
f->userdata = userdata;
se = fuse_session_new(&sop, f);
if (!se)
goto out_key_destroy;
se->receive_buf = fuse_ll_receive_buf;
se->process_buf = fuse_ll_process_buf;
return se;
out_key_destroy:
pthread_key_delete(f->pipe_key);
out_free:
pthread_mutex_destroy(&f->lock);
free(f);
out:
return NULL;
}
struct fuse_session*
fuse_lowlevel_new(struct fuse_args *args,
const struct fuse_lowlevel_ops *op,
size_t op_size,
void *userdata)
{
return fuse_lowlevel_new_common(args, op, op_size, userdata);
}
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