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virtiofsd: Remove source

Browse Source 
Now remove all the source.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Acked-by: Stefan Hajnoczi <stefanha@redhat.com>
This commit is contained in:
Dr. David Alan Gilbert
2023-02-16 18:15:08 +00:00
parent 8ab5e8a503
commit e0dc2631ec
19 changed files with 0 additions and 13693 deletions
Download Patch File Download Diff File Expand all files Collapse all files
tools/virtiofsd/buffer.c
-350
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@@ -1,350 +0,0 @@
/*
* FUSE: Filesystem in Userspace
* Copyright (C) 2010 Miklos Szeredi <miklos@szeredi.hu>
*
* Functions for dealing with `struct fuse_buf` and `struct
* fuse_bufvec`.
*
* This program can be distributed under the terms of the GNU LGPLv2.
* See the file COPYING.LIB
*/
#include "qemu/osdep.h"
#include "fuse_i.h"
#include "fuse_lowlevel.h"
size_t fuse_buf_size(const struct fuse_bufvec *bufv)
{
size_t i;
size_t size = 0;
for (i = 0; i < bufv->count; i++) {
if (bufv->buf[i].size == SIZE_MAX) {
size = SIZE_MAX;
} else {
size += bufv->buf[i].size;
}
}
return size;
}
static ssize_t fuse_buf_writev(struct fuse_buf *out_buf,
struct fuse_bufvec *in_buf)
{
ssize_t res, i, j;
size_t iovcnt = in_buf->count;
struct iovec *iov;
int fd = out_buf->fd;
iov = g_try_new0(struct iovec, iovcnt);
if (!iov) {
return -ENOMEM;
}
for (i = 0, j = 0; i < iovcnt; i++) {
/* Skip the buf with 0 size */
if (in_buf->buf[i].size) {
iov[j].iov_base = in_buf->buf[i].mem;
iov[j].iov_len = in_buf->buf[i].size;
j++;
}
}
if (out_buf->flags & FUSE_BUF_FD_SEEK) {
res = pwritev(fd, iov, iovcnt, out_buf->pos);
} else {
res = writev(fd, iov, iovcnt);
}
if (res == -1) {
res = -errno;
}
g_free(iov);
return res;
}
static size_t min_size(size_t s1, size_t s2)
{
return s1 < s2 ? s1 : s2;
}
static ssize_t fuse_buf_write(const struct fuse_buf *dst, size_t dst_off,
const struct fuse_buf *src, size_t src_off,
size_t len)
{
ssize_t res = 0;
size_t copied = 0;
while (len) {
if (dst->flags & FUSE_BUF_FD_SEEK) {
res = pwrite(dst->fd, (char *)src->mem + src_off, len,
dst->pos + dst_off);
} else {
res = write(dst->fd, (char *)src->mem + src_off, len);
}
if (res == -1) {
if (!copied) {
return -errno;
}
break;
}
if (res == 0) {
break;
}
copied += res;
if (!(dst->flags & FUSE_BUF_FD_RETRY)) {
break;
}
src_off += res;
dst_off += res;
len -= res;
}
return copied;
}
static ssize_t fuse_buf_read(const struct fuse_buf *dst, size_t dst_off,
const struct fuse_buf *src, size_t src_off,
size_t len)
{
ssize_t res = 0;
size_t copied = 0;
while (len) {
if (src->flags & FUSE_BUF_FD_SEEK) {
res = pread(src->fd, (char *)dst->mem + dst_off, len,
src->pos + src_off);
} else {
res = read(src->fd, (char *)dst->mem + dst_off, len);
}
if (res == -1) {
if (!copied) {
return -errno;
}
break;
}
if (res == 0) {
break;
}
copied += res;
if (!(src->flags & FUSE_BUF_FD_RETRY)) {
break;
}
dst_off += res;
src_off += res;
len -= res;
}
return copied;
}
static ssize_t fuse_buf_fd_to_fd(const struct fuse_buf *dst, size_t dst_off,
const struct fuse_buf *src, size_t src_off,
size_t len)
{
char buf[4096];
struct fuse_buf tmp = {
.size = sizeof(buf),
.flags = 0,
};
ssize_t res;
size_t copied = 0;
tmp.mem = buf;
while (len) {
size_t this_len = min_size(tmp.size, len);
size_t read_len;
res = fuse_buf_read(&tmp, 0, src, src_off, this_len);
if (res < 0) {
if (!copied) {
return res;
}
break;
}
if (res == 0) {
break;
}
read_len = res;
res = fuse_buf_write(dst, dst_off, &tmp, 0, read_len);
if (res < 0) {
if (!copied) {
return res;
}
break;
}
if (res == 0) {
break;
}
copied += res;
if (res < this_len) {
break;
}
dst_off += res;
src_off += res;
len -= res;
}
return copied;
}
static ssize_t fuse_buf_copy_one(const struct fuse_buf *dst, size_t dst_off,
const struct fuse_buf *src, size_t src_off,
size_t len)
{
int src_is_fd = src->flags & FUSE_BUF_IS_FD;
int dst_is_fd = dst->flags & FUSE_BUF_IS_FD;
if (!src_is_fd && !dst_is_fd) {
char *dstmem = (char *)dst->mem + dst_off;
char *srcmem = (char *)src->mem + src_off;
if (dstmem != srcmem) {
if (dstmem + len <= srcmem || srcmem + len <= dstmem) {
memcpy(dstmem, srcmem, len);
} else {
memmove(dstmem, srcmem, len);
}
}
return len;
} else if (!src_is_fd) {
return fuse_buf_write(dst, dst_off, src, src_off, len);
} else if (!dst_is_fd) {
return fuse_buf_read(dst, dst_off, src, src_off, len);
} else {
return fuse_buf_fd_to_fd(dst, dst_off, src, src_off, len);
}
}
static const struct fuse_buf *fuse_bufvec_current(struct fuse_bufvec *bufv)
{
if (bufv->idx < bufv->count) {
return &bufv->buf[bufv->idx];
} else {
return NULL;
}
}
static int fuse_bufvec_advance(struct fuse_bufvec *bufv, size_t len)
{
const struct fuse_buf *buf = fuse_bufvec_current(bufv);
if (!buf) {
return 0;
}
bufv->off += len;
assert(bufv->off <= buf->size);
if (bufv->off == buf->size) {
assert(bufv->idx < bufv->count);
bufv->idx++;
if (bufv->idx == bufv->count) {
return 0;
}
bufv->off = 0;
}
return 1;
}
ssize_t fuse_buf_copy(struct fuse_bufvec *dstv, struct fuse_bufvec *srcv)
{
size_t copied = 0, i;
if (dstv == srcv) {
return fuse_buf_size(dstv);
}
/*
* use writev to improve bandwidth when all the
* src buffers already mapped by the daemon
* process
*/
for (i = 0; i < srcv->count; i++) {
if (srcv->buf[i].flags & FUSE_BUF_IS_FD) {
break;
}
}
if ((i == srcv->count) && (dstv->count == 1) &&
(dstv->idx == 0) &&
(dstv->buf[0].flags & FUSE_BUF_IS_FD)) {
dstv->buf[0].pos += dstv->off;
return fuse_buf_writev(&dstv->buf[0], srcv);
}
for (;;) {
const struct fuse_buf *src = fuse_bufvec_current(srcv);
const struct fuse_buf *dst = fuse_bufvec_current(dstv);
size_t src_len;
size_t dst_len;
size_t len;
ssize_t res;
if (src == NULL || dst == NULL) {
break;
}
src_len = src->size - srcv->off;
dst_len = dst->size - dstv->off;
len = min_size(src_len, dst_len);
res = fuse_buf_copy_one(dst, dstv->off, src, srcv->off, len);
if (res < 0) {
if (!copied) {
return res;
}
break;
}
copied += res;
if (!fuse_bufvec_advance(srcv, res) ||
!fuse_bufvec_advance(dstv, res)) {
break;
}
if (res < len) {
break;
}
}
return copied;
}
void *fuse_mbuf_iter_advance(struct fuse_mbuf_iter *iter, size_t len)
{
void *ptr;
if (len > iter->size - iter->pos) {
return NULL;
}
ptr = iter->mem + iter->pos;
iter->pos += len;
return ptr;
}
const char *fuse_mbuf_iter_advance_str(struct fuse_mbuf_iter *iter)
{
const char *str = iter->mem + iter->pos;
size_t remaining = iter->size - iter->pos;
size_t i;
for (i = 0; i < remaining; i++) {
if (str[i] == '\0') {
iter->pos += i + 1;
return str;
}
}
return NULL;
}
tools/virtiofsd/fuse_common.h
-837
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tools/virtiofsd/fuse_i.h
-107
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@@ -1,107 +0,0 @@
/*
* 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
*/
#ifndef FUSE_I_H
#define FUSE_I_H
#define FUSE_USE_VERSION 31
#include "fuse_lowlevel.h"
struct fv_VuDev;
struct fv_QueueInfo;
struct fuse_security_context {
const char *name;
uint32_t ctxlen;
const void *ctx;
};
struct fuse_req {
struct fuse_session *se;
uint64_t unique;
int ctr;
pthread_mutex_t lock;
struct fuse_ctx ctx;
struct fuse_chan *ch;
int interrupted;
unsigned int ioctl_64bit:1;
union {
struct {
uint64_t unique;
} i;
struct {
fuse_interrupt_func_t func;
void *data;
} ni;
} u;
struct fuse_req *next;
struct fuse_req *prev;
struct fuse_security_context secctx;
};
struct fuse_notify_req {
uint64_t unique;
void (*reply)(struct fuse_notify_req *, fuse_req_t, fuse_ino_t,
const void *, const struct fuse_buf *);
struct fuse_notify_req *next;
struct fuse_notify_req *prev;
};
struct fuse_session {
char *mountpoint;
volatile int exited;
int fd;
int debug;
int deny_others;
struct fuse_lowlevel_ops op;
int got_init;
struct cuse_data *cuse_data;
void *userdata;
uid_t owner;
struct fuse_conn_info conn;
struct fuse_req list;
struct fuse_req interrupts;
pthread_mutex_t lock;
pthread_rwlock_t init_rwlock;
int got_destroy;
int broken_splice_nonblock;
uint64_t notify_ctr;
struct fuse_notify_req notify_list;
size_t bufsize;
int error;
char *vu_socket_path;
char *vu_socket_group;
int vu_listen_fd;
int vu_socketfd;
struct fv_VuDev *virtio_dev;
int thread_pool_size;
};
struct fuse_chan {
pthread_mutex_t lock;
int ctr;
int fd;
struct fv_QueueInfo *qi;
};
int fuse_send_reply_iov_nofree(fuse_req_t req, int error, struct iovec *iov,
int count);
void fuse_free_req(fuse_req_t req);
void fuse_session_process_buf_int(struct fuse_session *se,
struct fuse_bufvec *bufv,
struct fuse_chan *ch);
#define FUSE_MAX_MAX_PAGES 256
#define FUSE_DEFAULT_MAX_PAGES_PER_REQ 32
/* room needed in buffer to accommodate header */
#define FUSE_BUFFER_HEADER_SIZE 0x1000
#endif
tools/virtiofsd/fuse_log.c
-40
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@@ -1,40 +0,0 @@
/*
* FUSE: Filesystem in Userspace
* Copyright (C) 2019 Red Hat, Inc.
*
* Logging API.
*
* This program can be distributed under the terms of the GNU LGPLv2.
* See the file COPYING.LIB
*/
#include "qemu/osdep.h"
#include "fuse_log.h"
G_GNUC_PRINTF(2, 0)
static void default_log_func(__attribute__((unused)) enum fuse_log_level level,
const char *fmt, va_list ap)
{
vfprintf(stderr, fmt, ap);
}
static fuse_log_func_t log_func = default_log_func;
void fuse_set_log_func(fuse_log_func_t func)
{
if (!func) {
func = default_log_func;
}
log_func = func;
}
void fuse_log(enum fuse_log_level level, const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
log_func(level, fmt, ap);
va_end(ap);
}
tools/virtiofsd/fuse_log.h
-75
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@@ -1,75 +0,0 @@
/*
* FUSE: Filesystem in Userspace
* Copyright (C) 2019 Red Hat, Inc.
*
* This program can be distributed under the terms of the GNU LGPLv2.
* See the file COPYING.LIB.
*/
#ifndef FUSE_LOG_H_
#define FUSE_LOG_H_
/** @file
*
* This file defines the logging interface of FUSE
*/
/**
* Log severity level
*
* These levels correspond to syslog(2) log levels since they are widely used.
*/
enum fuse_log_level {
FUSE_LOG_EMERG,
FUSE_LOG_ALERT,
FUSE_LOG_CRIT,
FUSE_LOG_ERR,
FUSE_LOG_WARNING,
FUSE_LOG_NOTICE,
FUSE_LOG_INFO,
FUSE_LOG_DEBUG
};
/**
* Log message handler function.
*
* This function must be thread-safe. It may be called from any libfuse
* function, including fuse_parse_cmdline() and other functions invoked before
* a FUSE filesystem is created.
*
* Install a custom log message handler function using fuse_set_log_func().
*
* @param level log severity level
* @param fmt sprintf-style format string including newline
* @param ap format string arguments
*/
typedef void (*fuse_log_func_t)(enum fuse_log_level level, const char *fmt,
va_list ap)
G_GNUC_PRINTF(2, 0);
/**
* Install a custom log handler function.
*
* Log messages are emitted by libfuse functions to report errors and debug
* information. Messages are printed to stderr by default but this can be
* overridden by installing a custom log message handler function.
*
* The log message handler function is global and affects all FUSE filesystems
* created within this process.
*
* @param func a custom log message handler function or NULL to revert to
* the default
*/
void fuse_set_log_func(fuse_log_func_t func);
/**
* Emit a log message
*
* @param level severity level (FUSE_LOG_ERR, FUSE_LOG_DEBUG, etc)
* @param fmt sprintf-style format string including newline
*/
void fuse_log(enum fuse_log_level level, const char *fmt, ...)
G_GNUC_PRINTF(2, 3);
#endif /* FUSE_LOG_H_ */
tools/virtiofsd/fuse_lowlevel.c
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tools/virtiofsd/fuse_lowlevel.h
-1988
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tools/virtiofsd/fuse_misc.h
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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
*/
#include <pthread.h>
/*
* Versioned symbols cannot be used in some cases because it
* - confuse the dynamic linker in uClibc
* - not supported on MacOSX (in MachO binary format)
*/
#if (!defined(__UCLIBC__) && !defined(__APPLE__))
#define FUSE_SYMVER(x) __asm__(x)
#else
#define FUSE_SYMVER(x)
#endif
#ifndef USE_UCLIBC
#define fuse_mutex_init(mut) pthread_mutex_init(mut, NULL)
#else
/* Is this hack still needed? */
static inline void fuse_mutex_init(pthread_mutex_t *mut)
{
pthread_mutexattr_t attr;
pthread_mutexattr_init(&attr);
pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_ADAPTIVE_NP);
pthread_mutex_init(mut, &attr);
pthread_mutexattr_destroy(&attr);
}
#endif
#ifdef HAVE_STRUCT_STAT_ST_ATIM
/* Linux */
#define ST_ATIM_NSEC(stbuf) ((stbuf)->st_atim.tv_nsec)
#define ST_CTIM_NSEC(stbuf) ((stbuf)->st_ctim.tv_nsec)
#define ST_MTIM_NSEC(stbuf) ((stbuf)->st_mtim.tv_nsec)
#define ST_ATIM_NSEC_SET(stbuf, val) (stbuf)->st_atim.tv_nsec = (val)
#define ST_CTIM_NSEC_SET(stbuf, val) (stbuf)->st_ctim.tv_nsec = (val)
#define ST_MTIM_NSEC_SET(stbuf, val) (stbuf)->st_mtim.tv_nsec = (val)
#elif defined(HAVE_STRUCT_STAT_ST_ATIMESPEC)
/* FreeBSD */
#define ST_ATIM_NSEC(stbuf) ((stbuf)->st_atimespec.tv_nsec)
#define ST_CTIM_NSEC(stbuf) ((stbuf)->st_ctimespec.tv_nsec)
#define ST_MTIM_NSEC(stbuf) ((stbuf)->st_mtimespec.tv_nsec)
#define ST_ATIM_NSEC_SET(stbuf, val) (stbuf)->st_atimespec.tv_nsec = (val)
#define ST_CTIM_NSEC_SET(stbuf, val) (stbuf)->st_ctimespec.tv_nsec = (val)
#define ST_MTIM_NSEC_SET(stbuf, val) (stbuf)->st_mtimespec.tv_nsec = (val)
#else
#define ST_ATIM_NSEC(stbuf) 0
#define ST_CTIM_NSEC(stbuf) 0
#define ST_MTIM_NSEC(stbuf) 0
#define ST_ATIM_NSEC_SET(stbuf, val) do { } while (0)
#define ST_CTIM_NSEC_SET(stbuf, val) do { } while (0)
#define ST_MTIM_NSEC_SET(stbuf, val) do { } while (0)
#endif
tools/virtiofsd/fuse_opt.c
-446
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/*
* FUSE: Filesystem in Userspace
* Copyright (C) 2001-2007 Miklos Szeredi <miklos@szeredi.hu>
*
* Implementation of option parsing routines (dealing with `struct
* fuse_args`).
*
* This program can be distributed under the terms of the GNU LGPLv2.
* See the file COPYING.LIB
*/
#include "qemu/osdep.h"
#include "fuse_opt.h"
#include "fuse_i.h"
#include "fuse_misc.h"
struct fuse_opt_context {
void *data;
const struct fuse_opt *opt;
fuse_opt_proc_t proc;
int argctr;
int argc;
char **argv;
struct fuse_args outargs;
char *opts;
int nonopt;
};
void fuse_opt_free_args(struct fuse_args *args)
{
if (args) {
if (args->argv && args->allocated) {
int i;
for (i = 0; i < args->argc; i++) {
free(args->argv[i]);
}
free(args->argv);
}
args->argc = 0;
args->argv = NULL;
args->allocated = 0;
}
}
static int alloc_failed(void)
{
fuse_log(FUSE_LOG_ERR, "fuse: memory allocation failed\n");
return -1;
}
int fuse_opt_add_arg(struct fuse_args *args, const char *arg)
{
char **newargv;
char *newarg;
assert(!args->argv || args->allocated);
newarg = strdup(arg);
if (!newarg) {
return alloc_failed();
}
newargv = realloc(args->argv, (args->argc + 2) * sizeof(char *));
if (!newargv) {
free(newarg);
return alloc_failed();
}
args->argv = newargv;
args->allocated = 1;
args->argv[args->argc++] = newarg;
args->argv[args->argc] = NULL;
return 0;
}
static int fuse_opt_insert_arg_common(struct fuse_args *args, int pos,
const char *arg)
{
assert(pos <= args->argc);
if (fuse_opt_add_arg(args, arg) == -1) {
return -1;
}
if (pos != args->argc - 1) {
char *newarg = args->argv[args->argc - 1];
memmove(&args->argv[pos + 1], &args->argv[pos],
sizeof(char *) * (args->argc - pos - 1));
args->argv[pos] = newarg;
}
return 0;
}
int fuse_opt_insert_arg(struct fuse_args *args, int pos, const char *arg)
{
return fuse_opt_insert_arg_common(args, pos, arg);
}
static int next_arg(struct fuse_opt_context *ctx, const char *opt)
{
if (ctx->argctr + 1 >= ctx->argc) {
fuse_log(FUSE_LOG_ERR, "fuse: missing argument after `%s'\n", opt);
return -1;
}
ctx->argctr++;
return 0;
}
static int add_arg(struct fuse_opt_context *ctx, const char *arg)
{
return fuse_opt_add_arg(&ctx->outargs, arg);
}
static int add_opt_common(char **opts, const char *opt, int esc)
{
unsigned oldlen = *opts ? strlen(*opts) : 0;
char *d = realloc(*opts, oldlen + 1 + strlen(opt) * 2 + 1);
if (!d) {
return alloc_failed();
}
*opts = d;
if (oldlen) {
d += oldlen;
*d++ = ',';
}
for (; *opt; opt++) {
if (esc && (*opt == ',' || *opt == '\\')) {
*d++ = '\\';
}
*d++ = *opt;
}
*d = '\0';
return 0;
}
int fuse_opt_add_opt(char **opts, const char *opt)
{
return add_opt_common(opts, opt, 0);
}
int fuse_opt_add_opt_escaped(char **opts, const char *opt)
{
return add_opt_common(opts, opt, 1);
}
static int add_opt(struct fuse_opt_context *ctx, const char *opt)
{
return add_opt_common(&ctx->opts, opt, 1);
}
static int call_proc(struct fuse_opt_context *ctx, const char *arg, int key,
int iso)
{
if (key == FUSE_OPT_KEY_DISCARD) {
return 0;
}
if (key != FUSE_OPT_KEY_KEEP && ctx->proc) {
int res = ctx->proc(ctx->data, arg, key, &ctx->outargs);
if (res == -1 || !res) {
return res;
}
}
if (iso) {
return add_opt(ctx, arg);
} else {
return add_arg(ctx, arg);
}
}
static int match_template(const char *t, const char *arg, unsigned *sepp)
{
int arglen = strlen(arg);
const char *sep = strchr(t, '=');
sep = sep ? sep : strchr(t, ' ');
if (sep && (!sep[1] || sep[1] == '%')) {
int tlen = sep - t;
if (sep[0] == '=') {
tlen++;
}
if (arglen >= tlen && strncmp(arg, t, tlen) == 0) {
*sepp = sep - t;
return 1;
}
}
if (strcmp(t, arg) == 0) {
*sepp = 0;
return 1;
}
return 0;
}
static const struct fuse_opt *find_opt(const struct fuse_opt *opt,
const char *arg, unsigned *sepp)
{
for (; opt && opt->templ; opt++) {
if (match_template(opt->templ, arg, sepp)) {
return opt;
}
}
return NULL;
}
int fuse_opt_match(const struct fuse_opt *opts, const char *opt)
{
unsigned dummy;
return find_opt(opts, opt, &dummy) ? 1 : 0;
}
static int process_opt_param(void *var, const char *format, const char *param,
const char *arg)
{
assert(format[0] == '%');
if (format[1] == 's') {
char **s = var;
char *copy = strdup(param);
if (!copy) {
return alloc_failed();
}
free(*s);
*s = copy;
} else {
if (sscanf(param, format, var) != 1) {
fuse_log(FUSE_LOG_ERR, "fuse: invalid parameter in option `%s'\n",
arg);
return -1;
}
}
return 0;
}
static int process_opt(struct fuse_opt_context *ctx, const struct fuse_opt *opt,
unsigned sep, const char *arg, int iso)
{
if (opt->offset == -1U) {
if (call_proc(ctx, arg, opt->value, iso) == -1) {
return -1;
}
} else {
void *var = (char *)ctx->data + opt->offset;
if (sep && opt->templ[sep + 1]) {
const char *param = arg + sep;
if (opt->templ[sep] == '=') {
param++;
}
if (process_opt_param(var, opt->templ + sep + 1, param, arg) ==
-1) {
return -1;
}
} else {
*(int *)var = opt->value;
}
}
return 0;
}
static int process_opt_sep_arg(struct fuse_opt_context *ctx,
const struct fuse_opt *opt, unsigned sep,
const char *arg, int iso)
{
int res;
char *newarg;
char *param;
if (next_arg(ctx, arg) == -1) {
return -1;
}
param = ctx->argv[ctx->argctr];
newarg = g_try_malloc(sep + strlen(param) + 1);
if (!newarg) {
return alloc_failed();
}
memcpy(newarg, arg, sep);
strcpy(newarg + sep, param);
res = process_opt(ctx, opt, sep, newarg, iso);
g_free(newarg);
return res;
}
static int process_gopt(struct fuse_opt_context *ctx, const char *arg, int iso)
{
unsigned sep;
const struct fuse_opt *opt = find_opt(ctx->opt, arg, &sep);
if (opt) {
for (; opt; opt = find_opt(opt + 1, arg, &sep)) {
int res;
if (sep && opt->templ[sep] == ' ' && !arg[sep]) {
res = process_opt_sep_arg(ctx, opt, sep, arg, iso);
} else {
res = process_opt(ctx, opt, sep, arg, iso);
}
if (res == -1) {
return -1;
}
}
return 0;
} else {
return call_proc(ctx, arg, FUSE_OPT_KEY_OPT, iso);
}
}
static int process_real_option_group(struct fuse_opt_context *ctx, char *opts)
{
char *s = opts;
char *d = s;
int end = 0;
while (!end) {
if (*s == '\0') {
end = 1;
}
if (*s == ',' || end) {
int res;
*d = '\0';
res = process_gopt(ctx, opts, 1);
if (res == -1) {
return -1;
}
d = opts;
} else {
if (s[0] == '\\' && s[1] != '\0') {
s++;
if (s[0] >= '0' && s[0] <= '3' && s[1] >= '0' && s[1] <= '7' &&
s[2] >= '0' && s[2] <= '7') {
*d++ = (s[0] - '0') * 0100 + (s[1] - '0') * 0010 +
(s[2] - '0');
s += 2;
} else {
*d++ = *s;
}
} else {
*d++ = *s;
}
}
s++;
}
return 0;
}
static int process_option_group(struct fuse_opt_context *ctx, const char *opts)
{
int res;
char *copy = strdup(opts);
if (!copy) {
fuse_log(FUSE_LOG_ERR, "fuse: memory allocation failed\n");
return -1;
}
res = process_real_option_group(ctx, copy);
free(copy);
return res;
}
static int process_one(struct fuse_opt_context *ctx, const char *arg)
{
if (ctx->nonopt || arg[0] != '-') {
return call_proc(ctx, arg, FUSE_OPT_KEY_NONOPT, 0);
} else if (arg[1] == 'o') {
if (arg[2]) {
return process_option_group(ctx, arg + 2);
} else {
if (next_arg(ctx, arg) == -1) {
return -1;
}
return process_option_group(ctx, ctx->argv[ctx->argctr]);
}
} else if (arg[1] == '-' && !arg[2]) {
if (add_arg(ctx, arg) == -1) {
return -1;
}
ctx->nonopt = ctx->outargs.argc;
return 0;
} else {
return process_gopt(ctx, arg, 0);
}
}
static int opt_parse(struct fuse_opt_context *ctx)
{
if (ctx->argc) {
if (add_arg(ctx, ctx->argv[0]) == -1) {
return -1;
}
}
for (ctx->argctr = 1; ctx->argctr < ctx->argc; ctx->argctr++) {
if (process_one(ctx, ctx->argv[ctx->argctr]) == -1) {
return -1;
}
}
if (ctx->opts) {
if (fuse_opt_insert_arg(&ctx->outargs, 1, "-o") == -1 ||
fuse_opt_insert_arg(&ctx->outargs, 2, ctx->opts) == -1) {
return -1;
}
}
/* If option separator ("--") is the last argument, remove it */
if (ctx->nonopt && ctx->nonopt == ctx->outargs.argc &&
strcmp(ctx->outargs.argv[ctx->outargs.argc - 1], "--") == 0) {
free(ctx->outargs.argv[ctx->outargs.argc - 1]);
ctx->outargs.argv[--ctx->outargs.argc] = NULL;
}
return 0;
}
int fuse_opt_parse(struct fuse_args *args, void *data,
const struct fuse_opt opts[], fuse_opt_proc_t proc)
{
int res;
struct fuse_opt_context ctx = {
.data = data,
.opt = opts,
.proc = proc,
};
if (!args || !args->argv || !args->argc) {
return 0;
}
ctx.argc = args->argc;
ctx.argv = args->argv;
res = opt_parse(&ctx);
if (res != -1) {
struct fuse_args tmp = *args;
*args = ctx.outargs;
ctx.outargs = tmp;
}
free(ctx.opts);
fuse_opt_free_args(&ctx.outargs);
return res;
}
tools/virtiofsd/fuse_opt.h
-272
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@@ -1,272 +0,0 @@
/*
* 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.
*/
#ifndef FUSE_OPT_H_
#define FUSE_OPT_H_
/** @file
*
* This file defines the option parsing interface of FUSE
*/
/**
* Option description
*
* This structure describes a single option, and action associated
* with it, in case it matches.
*
* More than one such match may occur, in which case the action for
* each match is executed.
*
* There are three possible actions in case of a match:
*
* i) An integer (int or unsigned) variable determined by 'offset' is
* set to 'value'
*
* ii) The processing function is called, with 'value' as the key
*
* iii) An integer (any) or string (char *) variable determined by
* 'offset' is set to the value of an option parameter
*
* 'offset' should normally be either set to
*
* - 'offsetof(struct foo, member)' actions i) and iii)
*
* - -1 action ii)
*
* The 'offsetof()' macro is defined in the <stddef.h> header.
*
* The template determines which options match, and also have an
* effect on the action. Normally the action is either i) or ii), but
* if a format is present in the template, then action iii) is
* performed.
*
* The types of templates are:
*
* 1) "-x", "-foo", "--foo", "--foo-bar", etc. These match only
* themselves. Invalid values are "--" and anything beginning
* with "-o"
*
* 2) "foo", "foo-bar", etc. These match "-ofoo", "-ofoo-bar" or
* the relevant option in a comma separated option list
*
* 3) "bar=", "--foo=", etc. These are variations of 1) and 2)
* which have a parameter
*
* 4) "bar=%s", "--foo=%lu", etc. Same matching as above but perform
* action iii).
*
* 5) "-x ", etc. Matches either "-xparam" or "-x param" as
* two separate arguments
*
* 6) "-x %s", etc. Combination of 4) and 5)
*
* If the format is "%s", memory is allocated for the string unlike with
* scanf(). The previous value (if non-NULL) stored at the this location is
* freed.
*/
struct fuse_opt {
/** Matching template and optional parameter formatting */
const char *templ;
/**
* Offset of variable within 'data' parameter of fuse_opt_parse()
* or -1
*/
unsigned long offset;
/**
* Value to set the variable to, or to be passed as 'key' to the
* processing function. Ignored if template has a format
*/
int value;
};
/**
* Key option. In case of a match, the processing function will be
* called with the specified key.
*/
#define FUSE_OPT_KEY(templ, key) \
{ \
templ, -1U, key \
}
/**
* Last option. An array of 'struct fuse_opt' must end with a NULL
* template value
*/
#define FUSE_OPT_END \
{ \
NULL, 0, 0 \
}
/**
* Argument list
*/
struct fuse_args {
/** Argument count */
int argc;
/** Argument vector. NULL terminated */
char **argv;
/** Is 'argv' allocated? */
int allocated;
};
/**
* Initializer for 'struct fuse_args'
*/
#define FUSE_ARGS_INIT(argc, argv) \
{ \
argc, argv, 0 \
}
/**
* Key value passed to the processing function if an option did not
* match any template
*/
#define FUSE_OPT_KEY_OPT -1
/**
* Key value passed to the processing function for all non-options
*
* Non-options are the arguments beginning with a character other than
* '-' or all arguments after the special '--' option
*/
#define FUSE_OPT_KEY_NONOPT -2
/**
* Special key value for options to keep
*
* Argument is not passed to processing function, but behave as if the
* processing function returned 1
*/
#define FUSE_OPT_KEY_KEEP -3
/**
* Special key value for options to discard
*
* Argument is not passed to processing function, but behave as if the
* processing function returned zero
*/
#define FUSE_OPT_KEY_DISCARD -4
/**
* Processing function
*
* This function is called if
* - option did not match any 'struct fuse_opt'
* - argument is a non-option
* - option did match and offset was set to -1
*
* The 'arg' parameter will always contain the whole argument or
* option including the parameter if exists. A two-argument option
* ("-x foo") is always converted to single argument option of the
* form "-xfoo" before this function is called.
*
* Options of the form '-ofoo' are passed to this function without the
* '-o' prefix.
*
* The return value of this function determines whether this argument
* is to be inserted into the output argument vector, or discarded.
*
* @param data is the user data passed to the fuse_opt_parse() function
* @param arg is the whole argument or option
* @param key determines why the processing function was called
* @param outargs the current output argument list
* @return -1 on error, 0 if arg is to be discarded, 1 if arg should be kept
*/
typedef int (*fuse_opt_proc_t)(void *data, const char *arg, int key,
struct fuse_args *outargs);
/**
* Option parsing function
*
* If 'args' was returned from a previous call to fuse_opt_parse() or
* it was constructed from
*
* A NULL 'args' is equivalent to an empty argument vector
*
* A NULL 'opts' is equivalent to an 'opts' array containing a single
* end marker
*
* A NULL 'proc' is equivalent to a processing function always
* returning '1'
*
* @param args is the input and output argument list
* @param data is the user data
* @param opts is the option description array
* @param proc is the processing function
* @return -1 on error, 0 on success
*/
int fuse_opt_parse(struct fuse_args *args, void *data,
const struct fuse_opt opts[], fuse_opt_proc_t proc);
/**
* Add an option to a comma separated option list
*
* @param opts is a pointer to an option list, may point to a NULL value
* @param opt is the option to add
* @return -1 on allocation error, 0 on success
*/
int fuse_opt_add_opt(char **opts, const char *opt);
/**
* Add an option, escaping commas, to a comma separated option list
*
* @param opts is a pointer to an option list, may point to a NULL value
* @param opt is the option to add
* @return -1 on allocation error, 0 on success
*/
int fuse_opt_add_opt_escaped(char **opts, const char *opt);
/**
* Add an argument to a NULL terminated argument vector
*
* @param args is the structure containing the current argument list
* @param arg is the new argument to add
* @return -1 on allocation error, 0 on success
*/
int fuse_opt_add_arg(struct fuse_args *args, const char *arg);
/**
* Add an argument at the specified position in a NULL terminated
* argument vector
*
* Adds the argument to the N-th position. This is useful for adding
* options at the beginning of the array which must not come after the
* special '--' option.
*
* @param args is the structure containing the current argument list
* @param pos is the position at which to add the argument
* @param arg is the new argument to add
* @return -1 on allocation error, 0 on success
*/
int fuse_opt_insert_arg(struct fuse_args *args, int pos, const char *arg);
/**
* Free the contents of argument list
*
* The structure itself is not freed
*
* @param args is the structure containing the argument list
*/
void fuse_opt_free_args(struct fuse_args *args);
/**
* Check if an option matches
*
* @param opts is the option description array
* @param opt is the option to match
* @return 1 if a match is found, 0 if not
*/
int fuse_opt_match(const struct fuse_opt opts[], const char *opt);
#endif /* FUSE_OPT_H_ */
tools/virtiofsd/fuse_signals.c
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@@ -1,93 +0,0 @@
/*
* FUSE: Filesystem in Userspace
* Copyright (C) 2001-2007 Miklos Szeredi <miklos@szeredi.hu>
*
* Utility functions for setting signal handlers.
*
* This program can be distributed under the terms of the GNU LGPLv2.
* See the file COPYING.LIB
*/
#include "qemu/osdep.h"
#include "fuse_i.h"
#include "fuse_lowlevel.h"
static struct fuse_session *fuse_instance;
static void exit_handler(int sig)
{
if (fuse_instance) {
fuse_session_exit(fuse_instance);
if (sig <= 0) {
fuse_log(FUSE_LOG_ERR, "assertion error: signal value <= 0\n");
abort();
}
fuse_instance->error = sig;
}
}
static void do_nothing(int sig)
{
(void)sig;
}
static int set_one_signal_handler(int sig, void (*handler)(int), int remove)
{
struct sigaction sa;
struct sigaction old_sa;
memset(&sa, 0, sizeof(struct sigaction));
sa.sa_handler = remove ? SIG_DFL : handler;
sigemptyset(&(sa.sa_mask));
sa.sa_flags = 0;
if (sigaction(sig, NULL, &old_sa) == -1) {
fuse_log(FUSE_LOG_ERR, "fuse: cannot get old signal handler: %s\n",
strerror(errno));
return -1;
}
if (old_sa.sa_handler == (remove ? handler : SIG_DFL) &&
sigaction(sig, &sa, NULL) == -1) {
fuse_log(FUSE_LOG_ERR, "fuse: cannot set signal handler: %s\n",
strerror(errno));
return -1;
}
return 0;
}
int fuse_set_signal_handlers(struct fuse_session *se)
{
/*
* If we used SIG_IGN instead of the do_nothing function,
* then we would be unable to tell if we set SIG_IGN (and
* thus should reset to SIG_DFL in fuse_remove_signal_handlers)
* or if it was already set to SIG_IGN (and should be left
* untouched.
*/
if (set_one_signal_handler(SIGHUP, exit_handler, 0) == -1 ||
set_one_signal_handler(SIGINT, exit_handler, 0) == -1 ||
set_one_signal_handler(SIGTERM, exit_handler, 0) == -1 ||
set_one_signal_handler(SIGPIPE, do_nothing, 0) == -1) {
return -1;
}
fuse_instance = se;
return 0;
}
void fuse_remove_signal_handlers(struct fuse_session *se)
{
if (fuse_instance != se) {
fuse_log(FUSE_LOG_ERR,
"fuse: fuse_remove_signal_handlers: unknown session\n");
} else {
fuse_instance = NULL;
}
set_one_signal_handler(SIGHUP, exit_handler, 1);
set_one_signal_handler(SIGINT, exit_handler, 1);
set_one_signal_handler(SIGTERM, exit_handler, 1);
set_one_signal_handler(SIGPIPE, do_nothing, 1);
}
tools/virtiofsd/fuse_virtio.c
-1081
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tools/virtiofsd/fuse_virtio.h
-33
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@@ -1,33 +0,0 @@
/*
* virtio-fs glue for FUSE
* Copyright (C) 2018 Red Hat, Inc. and/or its affiliates
*
* Authors:
* Dave Gilbert <dgilbert@redhat.com>
*
* Implements the glue between libfuse and libvhost-user
*
* This program can be distributed under the terms of the GNU LGPLv2.
* See the file COPYING.LIB
*/
#ifndef FUSE_VIRTIO_H
#define FUSE_VIRTIO_H
#include "fuse_i.h"
struct fuse_session;
int virtio_session_mount(struct fuse_session *se);
void virtio_session_close(struct fuse_session *se);
int virtio_loop(struct fuse_session *se);
int virtio_send_msg(struct fuse_session *se, struct fuse_chan *ch,
struct iovec *iov, int count);
int virtio_send_data_iov(struct fuse_session *se, struct fuse_chan *ch,
struct iovec *iov, int count,
struct fuse_bufvec *buf, size_t len);
#endif
tools/virtiofsd/helper.c
-409
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@@ -1,409 +0,0 @@
/*
* FUSE: Filesystem in Userspace
* Copyright (C) 2001-2007 Miklos Szeredi <miklos@szeredi.hu>
*
* Helper functions to create (simple) standalone programs. With the
* aid of these functions it should be possible to create full FUSE
* file system by implementing nothing but the request handlers.
* This program can be distributed under the terms of the GNU LGPLv2.
* See the file COPYING.LIB.
*/
#include "qemu/osdep.h"
#include "fuse_i.h"
#include "fuse_lowlevel.h"
#include "fuse_misc.h"
#include "fuse_opt.h"
#include <sys/param.h>
#include <sys/resource.h>
#define FUSE_HELPER_OPT(t, p) \
{ \
t, offsetof(struct fuse_cmdline_opts, p), 1 \
}
#define FUSE_HELPER_OPT_VALUE(t, p, v) \
{ \
t, offsetof(struct fuse_cmdline_opts, p), v \
}
static const struct fuse_opt fuse_helper_opts[] = {
FUSE_HELPER_OPT("-h", show_help),
FUSE_HELPER_OPT("--help", show_help),
FUSE_HELPER_OPT("-V", show_version),
FUSE_HELPER_OPT("--version", show_version),
FUSE_HELPER_OPT("--print-capabilities", print_capabilities),
FUSE_HELPER_OPT("-d", debug),
FUSE_HELPER_OPT("debug", debug),
FUSE_HELPER_OPT("-d", foreground),
FUSE_HELPER_OPT("debug", foreground),
FUSE_OPT_KEY("-d", FUSE_OPT_KEY_KEEP),
FUSE_OPT_KEY("debug", FUSE_OPT_KEY_KEEP),
FUSE_HELPER_OPT("-f", foreground),
FUSE_HELPER_OPT_VALUE("--daemonize", foreground, 0),
FUSE_HELPER_OPT("fsname=", nodefault_subtype),
FUSE_OPT_KEY("fsname=", FUSE_OPT_KEY_KEEP),
FUSE_HELPER_OPT("subtype=", nodefault_subtype),
FUSE_OPT_KEY("subtype=", FUSE_OPT_KEY_KEEP),
FUSE_HELPER_OPT("max_idle_threads=%u", max_idle_threads),
FUSE_HELPER_OPT("--rlimit-nofile=%lu", rlimit_nofile),
FUSE_HELPER_OPT("--syslog", syslog),
FUSE_HELPER_OPT_VALUE("log_level=debug", log_level, FUSE_LOG_DEBUG),
FUSE_HELPER_OPT_VALUE("log_level=info", log_level, FUSE_LOG_INFO),
FUSE_HELPER_OPT_VALUE("log_level=warn", log_level, FUSE_LOG_WARNING),
FUSE_HELPER_OPT_VALUE("log_level=err", log_level, FUSE_LOG_ERR),
FUSE_OPT_END
};
struct fuse_conn_info_opts {
int atomic_o_trunc;
int no_remote_posix_lock;
int no_remote_flock;
int splice_write;
int splice_move;
int splice_read;
int no_splice_write;
int no_splice_move;
int no_splice_read;
int auto_inval_data;
int no_auto_inval_data;
int no_readdirplus;
int no_readdirplus_auto;
int async_dio;
int no_async_dio;
int writeback_cache;
int no_writeback_cache;
int async_read;
int sync_read;
unsigned max_write;
unsigned max_readahead;
unsigned max_background;
unsigned congestion_threshold;
unsigned time_gran;
int set_max_write;
int set_max_readahead;
int set_max_background;
int set_congestion_threshold;
int set_time_gran;
};
#define CONN_OPTION(t, p, v) \
{ \
t, offsetof(struct fuse_conn_info_opts, p), v \
}
static const struct fuse_opt conn_info_opt_spec[] = {
CONN_OPTION("max_write=%u", max_write, 0),
CONN_OPTION("max_write=", set_max_write, 1),
CONN_OPTION("max_readahead=%u", max_readahead, 0),
CONN_OPTION("max_readahead=", set_max_readahead, 1),
CONN_OPTION("max_background=%u", max_background, 0),
CONN_OPTION("max_background=", set_max_background, 1),
CONN_OPTION("congestion_threshold=%u", congestion_threshold, 0),
CONN_OPTION("congestion_threshold=", set_congestion_threshold, 1),
CONN_OPTION("sync_read", sync_read, 1),
CONN_OPTION("async_read", async_read, 1),
CONN_OPTION("atomic_o_trunc", atomic_o_trunc, 1),
CONN_OPTION("no_remote_lock", no_remote_posix_lock, 1),
CONN_OPTION("no_remote_lock", no_remote_flock, 1),
CONN_OPTION("no_remote_flock", no_remote_flock, 1),
CONN_OPTION("no_remote_posix_lock", no_remote_posix_lock, 1),
CONN_OPTION("splice_write", splice_write, 1),
CONN_OPTION("no_splice_write", no_splice_write, 1),
CONN_OPTION("splice_move", splice_move, 1),
CONN_OPTION("no_splice_move", no_splice_move, 1),
CONN_OPTION("splice_read", splice_read, 1),
CONN_OPTION("no_splice_read", no_splice_read, 1),
CONN_OPTION("auto_inval_data", auto_inval_data, 1),
CONN_OPTION("no_auto_inval_data", no_auto_inval_data, 1),
CONN_OPTION("readdirplus=no", no_readdirplus, 1),
CONN_OPTION("readdirplus=yes", no_readdirplus, 0),
CONN_OPTION("readdirplus=yes", no_readdirplus_auto, 1),
CONN_OPTION("readdirplus=auto", no_readdirplus, 0),
CONN_OPTION("readdirplus=auto", no_readdirplus_auto, 0),
CONN_OPTION("async_dio", async_dio, 1),
CONN_OPTION("no_async_dio", no_async_dio, 1),
CONN_OPTION("writeback_cache", writeback_cache, 1),
CONN_OPTION("no_writeback_cache", no_writeback_cache, 1),
CONN_OPTION("time_gran=%u", time_gran, 0),
CONN_OPTION("time_gran=", set_time_gran, 1),
FUSE_OPT_END
};
void fuse_cmdline_help(void)
{
printf(" -h --help print help\n"
" -V --version print version\n"
" --print-capabilities print vhost-user.json\n"
" -d -o debug enable debug output (implies -f)\n"
" --syslog log to syslog (default stderr)\n"
" -f foreground operation\n"
" --daemonize run in background\n"
" -o cache=<mode> cache mode. could be one of \"auto, "
"always, none\"\n"
" default: auto\n"
" -o flock|no_flock enable/disable flock\n"
" default: no_flock\n"
" -o log_level=<level> log level, default to \"info\"\n"
" level could be one of \"debug, "
"info, warn, err\"\n"
" -o max_idle_threads the maximum number of idle worker "
"threads\n"
" allowed (default: 10)\n"
" -o posix_lock|no_posix_lock\n"
" enable/disable remote posix lock\n"
" default: no_posix_lock\n"
" -o readdirplus|no_readdirplus\n"
" enable/disable readirplus\n"
" default: readdirplus except with "
"cache=none\n"
" -o sandbox=namespace|chroot\n"
" sandboxing mode:\n"
" - namespace: mount, pid, and net\n"
" namespaces with pivot_root(2)\n"
" into shared directory\n"
" - chroot: chroot(2) into shared\n"
" directory (use in containers)\n"
" default: namespace\n"
" -o timeout=<number> I/O timeout (seconds)\n"
" default: depends on cache= option.\n"
" -o writeback|no_writeback enable/disable writeback cache\n"
" default: no_writeback\n"
" -o xattr|no_xattr enable/disable xattr\n"
" default: no_xattr\n"
" -o xattrmap=<mapping> Enable xattr mapping (enables xattr)\n"
" <mapping> is a string consists of a series of rules\n"
" e.g. -o xattrmap=:map::user.virtiofs.:\n"
" -o modcaps=CAPLIST Modify the list of capabilities\n"
" e.g. -o modcaps=+sys_admin:-chown\n"
" --rlimit-nofile=<num> set maximum number of file descriptors\n"
" (0 leaves rlimit unchanged)\n"
" default: min(1000000, fs.file-max - 16384)\n"
" if the current rlimit is lower\n"
" -o allow_direct_io|no_allow_direct_io\n"
" retain/discard O_DIRECT flags passed down\n"
" to virtiofsd from guest applications.\n"
" default: no_allow_direct_io\n"
" -o announce_submounts Announce sub-mount points to the guest\n"
" -o posix_acl/no_posix_acl Enable/Disable posix_acl. (default: disabled)\n"
" -o security_label/no_security_label Enable/Disable security label. (default: disabled)\n"
" -o killpriv_v2/no_killpriv_v2\n"
" Enable/Disable FUSE_HANDLE_KILLPRIV_V2.\n"
" (default: enabled as long as client supports it)\n"
);
}
static int fuse_helper_opt_proc(void *data, const char *arg, int key,
struct fuse_args *outargs)
{
(void)data;
(void)outargs;
switch (key) {
case FUSE_OPT_KEY_NONOPT:
fuse_log(FUSE_LOG_ERR, "fuse: invalid argument `%s'\n", arg);
return -1;
default:
/* Pass through unknown options */
return 1;
}
}
static unsigned long get_default_rlimit_nofile(void)
{
g_autofree gchar *file_max_str = NULL;
const rlim_t reserved_fds = 16384; /* leave at least this many fds free */
rlim_t max_fds = 1000000; /* our default RLIMIT_NOFILE target */
rlim_t file_max;
struct rlimit rlim;
/*
* Reduce max_fds below the system-wide maximum, if necessary. This
* ensures there are fds available for other processes so we don't
* cause resource exhaustion.
*/
if (!g_file_get_contents("/proc/sys/fs/file-max", &file_max_str,
NULL, NULL)) {
fuse_log(FUSE_LOG_ERR, "can't read /proc/sys/fs/file-max\n");
exit(1);
}
file_max = g_ascii_strtoull(file_max_str, NULL, 10);
if (file_max < 2 * reserved_fds) {
fuse_log(FUSE_LOG_ERR,
"The fs.file-max sysctl is too low (%lu) to allow a "
"reasonable number of open files.\n",
(unsigned long)file_max);
exit(1);
}
max_fds = MIN(file_max - reserved_fds, max_fds);
if (getrlimit(RLIMIT_NOFILE, &rlim) < 0) {
fuse_log(FUSE_LOG_ERR, "getrlimit(RLIMIT_NOFILE): %m\n");
exit(1);
}
if (rlim.rlim_cur >= max_fds) {
return 0; /* we have more fds available than required! */
}
return max_fds;
}
int fuse_parse_cmdline(struct fuse_args *args, struct fuse_cmdline_opts *opts)
{
memset(opts, 0, sizeof(struct fuse_cmdline_opts));
opts->max_idle_threads = 10;
opts->rlimit_nofile = get_default_rlimit_nofile();
opts->foreground = 1;
if (fuse_opt_parse(args, opts, fuse_helper_opts, fuse_helper_opt_proc) ==
-1) {
return -1;
}
return 0;
}
int fuse_daemonize(int foreground)
{
int ret = 0, rett;
if (!foreground) {
int nullfd;
int waiter[2];
char completed;
if (!g_unix_open_pipe(waiter, FD_CLOEXEC, NULL)) {
fuse_log(FUSE_LOG_ERR, "fuse_daemonize: pipe: %s\n",
strerror(errno));
return -1;
}
/*
* demonize current process by forking it and killing the
* parent. This makes current process as a child of 'init'.
*/
switch (fork()) {
case -1:
fuse_log(FUSE_LOG_ERR, "fuse_daemonize: fork: %s\n",
strerror(errno));
return -1;
case 0:
break;
default:
_exit(read(waiter[0], &completed,
sizeof(completed) != sizeof(completed)));
}
if (setsid() == -1) {
fuse_log(FUSE_LOG_ERR, "fuse_daemonize: setsid: %s\n",
strerror(errno));
return -1;
}
ret = chdir("/");
nullfd = open("/dev/null", O_RDWR, 0);
if (nullfd != -1) {
rett = dup2(nullfd, 0);
if (!ret) {
ret = rett;
}
rett = dup2(nullfd, 1);
if (!ret) {
ret = rett;
}
rett = dup2(nullfd, 2);
if (!ret) {
ret = rett;
}
if (nullfd > 2) {
close(nullfd);
}
}
/* Propagate completion of daemon initialization */
completed = 1;
rett = write(waiter[1], &completed, sizeof(completed));
if (!ret) {
ret = rett;
}
close(waiter[0]);
close(waiter[1]);
} else {
ret = chdir("/");
}
return ret;
}
void fuse_apply_conn_info_opts(struct fuse_conn_info_opts *opts,
struct fuse_conn_info *conn)
{
if (opts->set_max_write) {
conn->max_write = opts->max_write;
}
if (opts->set_max_background) {
conn->max_background = opts->max_background;
}
if (opts->set_congestion_threshold) {
conn->congestion_threshold = opts->congestion_threshold;
}
if (opts->set_time_gran) {
conn->time_gran = opts->time_gran;
}
if (opts->set_max_readahead) {
conn->max_readahead = opts->max_readahead;
}
#define LL_ENABLE(cond, cap) \
if (cond) \
conn->want |= (cap)
#define LL_DISABLE(cond, cap) \
if (cond) \
conn->want &= ~(cap)
LL_ENABLE(opts->splice_read, FUSE_CAP_SPLICE_READ);
LL_DISABLE(opts->no_splice_read, FUSE_CAP_SPLICE_READ);
LL_ENABLE(opts->splice_write, FUSE_CAP_SPLICE_WRITE);
LL_DISABLE(opts->no_splice_write, FUSE_CAP_SPLICE_WRITE);
LL_ENABLE(opts->splice_move, FUSE_CAP_SPLICE_MOVE);
LL_DISABLE(opts->no_splice_move, FUSE_CAP_SPLICE_MOVE);
LL_ENABLE(opts->auto_inval_data, FUSE_CAP_AUTO_INVAL_DATA);
LL_DISABLE(opts->no_auto_inval_data, FUSE_CAP_AUTO_INVAL_DATA);
LL_DISABLE(opts->no_readdirplus, FUSE_CAP_READDIRPLUS);
LL_DISABLE(opts->no_readdirplus_auto, FUSE_CAP_READDIRPLUS_AUTO);
LL_ENABLE(opts->async_dio, FUSE_CAP_ASYNC_DIO);
LL_DISABLE(opts->no_async_dio, FUSE_CAP_ASYNC_DIO);
LL_ENABLE(opts->writeback_cache, FUSE_CAP_WRITEBACK_CACHE);
LL_DISABLE(opts->no_writeback_cache, FUSE_CAP_WRITEBACK_CACHE);
LL_ENABLE(opts->async_read, FUSE_CAP_ASYNC_READ);
LL_DISABLE(opts->sync_read, FUSE_CAP_ASYNC_READ);
LL_DISABLE(opts->no_remote_posix_lock, FUSE_CAP_POSIX_LOCKS);
LL_DISABLE(opts->no_remote_flock, FUSE_CAP_FLOCK_LOCKS);
}
struct fuse_conn_info_opts *fuse_parse_conn_info_opts(struct fuse_args *args)
{
struct fuse_conn_info_opts *opts;
opts = calloc(1, sizeof(struct fuse_conn_info_opts));
if (opts == NULL) {
fuse_log(FUSE_LOG_ERR, "calloc failed\n");
return NULL;
}
if (fuse_opt_parse(args, opts, conn_info_opt_spec, NULL) == -1) {
free(opts);
return NULL;
}
return opts;
}
tools/virtiofsd/passthrough_helpers.h
-51
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@@ -1,51 +0,0 @@
/*
* FUSE: Filesystem in Userspace
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE
*/
/*
* Creates files on the underlying file system in response to a FUSE_MKNOD
* operation
*/
static int mknod_wrapper(int dirfd, const char *path, const char *link,
int mode, dev_t rdev)
{
int res;
if (S_ISREG(mode)) {
res = openat(dirfd, path, O_CREAT | O_EXCL | O_WRONLY, mode);
if (res >= 0) {
res = close(res);
}
} else if (S_ISDIR(mode)) {
res = mkdirat(dirfd, path, mode);
} else if (S_ISLNK(mode) && link != NULL) {
res = symlinkat(link, dirfd, path);
} else if (S_ISFIFO(mode)) {
res = mkfifoat(dirfd, path, mode);
} else {
res = mknodat(dirfd, path, mode, rdev);
}
return res;
}
tools/virtiofsd/passthrough_ll.c
-4521
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File diff suppressed because it is too large Load Diff
tools/virtiofsd/passthrough_seccomp.c
-182
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@@ -1,182 +0,0 @@
/*
* Seccomp sandboxing for virtiofsd
*
* Copyright (C) 2019 Red Hat, Inc.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "qemu/osdep.h"
#include "passthrough_seccomp.h"
#include "fuse_i.h"
#include "fuse_log.h"
#include <seccomp.h>
/* Bodge for libseccomp 2.4.2 which broke ppoll */
#if !defined(__SNR_ppoll) && defined(__SNR_brk)
#ifdef __NR_ppoll
#define __SNR_ppoll __NR_ppoll
#else
#define __SNR_ppoll __PNR_ppoll
#endif
#endif
static const int syscall_allowlist[] = {
/* TODO ireg sem*() syscalls */
SCMP_SYS(brk),
SCMP_SYS(capget), /* For CAP_FSETID */
SCMP_SYS(capset),
SCMP_SYS(clock_gettime),
SCMP_SYS(clone),
#ifdef __NR_clone3
SCMP_SYS(clone3),
#endif
SCMP_SYS(close),
SCMP_SYS(copy_file_range),
SCMP_SYS(dup),
SCMP_SYS(eventfd2),
SCMP_SYS(exit),
SCMP_SYS(exit_group),
SCMP_SYS(fallocate),
SCMP_SYS(fchdir),
SCMP_SYS(fchmod),
SCMP_SYS(fchmodat),
SCMP_SYS(fchownat),
SCMP_SYS(fcntl),
SCMP_SYS(fdatasync),
SCMP_SYS(fgetxattr),
SCMP_SYS(flistxattr),
SCMP_SYS(flock),
SCMP_SYS(fremovexattr),
SCMP_SYS(fsetxattr),
SCMP_SYS(fstat),
SCMP_SYS(fstatfs),
SCMP_SYS(fstatfs64),
SCMP_SYS(fsync),
SCMP_SYS(ftruncate),
SCMP_SYS(futex),
SCMP_SYS(getdents),
SCMP_SYS(getdents64),
SCMP_SYS(getegid),
SCMP_SYS(geteuid),
SCMP_SYS(getpid),
SCMP_SYS(gettid),
SCMP_SYS(gettimeofday),
SCMP_SYS(getxattr),
SCMP_SYS(linkat),
SCMP_SYS(listxattr),
SCMP_SYS(lseek),
SCMP_SYS(_llseek), /* For POWER */
SCMP_SYS(madvise),
SCMP_SYS(mkdirat),
SCMP_SYS(mknodat),
SCMP_SYS(mmap),
SCMP_SYS(mprotect),
SCMP_SYS(mremap),
SCMP_SYS(munmap),
SCMP_SYS(newfstatat),
SCMP_SYS(statx),
SCMP_SYS(open),
SCMP_SYS(openat),
SCMP_SYS(ppoll),
SCMP_SYS(prctl), /* TODO restrict to just PR_SET_NAME? */
SCMP_SYS(preadv),
SCMP_SYS(pread64),
SCMP_SYS(pwritev),
SCMP_SYS(pwrite64),
SCMP_SYS(read),
SCMP_SYS(readlinkat),
SCMP_SYS(recvmsg),
SCMP_SYS(renameat),
SCMP_SYS(renameat2),
SCMP_SYS(removexattr),
SCMP_SYS(restart_syscall),
#ifdef __NR_rseq
SCMP_SYS(rseq), /* required since glibc 2.35 */
#endif
SCMP_SYS(rt_sigaction),
SCMP_SYS(rt_sigprocmask),
SCMP_SYS(rt_sigreturn),
SCMP_SYS(sched_getattr),
SCMP_SYS(sched_setattr),
SCMP_SYS(sendmsg),
SCMP_SYS(setresgid),
SCMP_SYS(setresuid),
#ifdef __NR_setresgid32
SCMP_SYS(setresgid32),
#endif
#ifdef __NR_setresuid32
SCMP_SYS(setresuid32),
#endif
SCMP_SYS(set_robust_list),
SCMP_SYS(setxattr),
SCMP_SYS(sigreturn),
SCMP_SYS(symlinkat),
SCMP_SYS(syncfs),
SCMP_SYS(time), /* Rarely needed, except on static builds */
SCMP_SYS(tgkill),
SCMP_SYS(unlinkat),
SCMP_SYS(unshare),
SCMP_SYS(utimensat),
SCMP_SYS(write),
SCMP_SYS(writev),
SCMP_SYS(umask),
};
/* Syscalls used when --syslog is enabled */
static const int syscall_allowlist_syslog[] = {
SCMP_SYS(send),
SCMP_SYS(sendto),
};
static void add_allowlist(scmp_filter_ctx ctx, const int syscalls[], size_t len)
{
size_t i;
for (i = 0; i < len; i++) {
if (seccomp_rule_add(ctx, SCMP_ACT_ALLOW, syscalls[i], 0) != 0) {
fuse_log(FUSE_LOG_ERR, "seccomp_rule_add syscall %d failed\n",
syscalls[i]);
exit(1);
}
}
}
void setup_seccomp(bool enable_syslog)
{
scmp_filter_ctx ctx;
#ifdef SCMP_ACT_KILL_PROCESS
ctx = seccomp_init(SCMP_ACT_KILL_PROCESS);
/* Handle a newer libseccomp but an older kernel */
if (!ctx && errno == EOPNOTSUPP) {
ctx = seccomp_init(SCMP_ACT_TRAP);
}
#else
ctx = seccomp_init(SCMP_ACT_TRAP);
#endif
if (!ctx) {
fuse_log(FUSE_LOG_ERR, "seccomp_init() failed\n");
exit(1);
}
add_allowlist(ctx, syscall_allowlist, G_N_ELEMENTS(syscall_allowlist));
if (enable_syslog) {
add_allowlist(ctx, syscall_allowlist_syslog,
G_N_ELEMENTS(syscall_allowlist_syslog));
}
/* libvhost-user calls this for post-copy migration, we don't need it */
if (seccomp_rule_add(ctx, SCMP_ACT_ERRNO(ENOSYS),
SCMP_SYS(userfaultfd), 0) != 0) {
fuse_log(FUSE_LOG_ERR, "seccomp_rule_add userfaultfd failed\n");
exit(1);
}
if (seccomp_load(ctx) < 0) {
fuse_log(FUSE_LOG_ERR, "seccomp_load() failed\n");
exit(1);
}
seccomp_release(ctx);
}
tools/virtiofsd/passthrough_seccomp.h
-14
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@@ -1,14 +0,0 @@
/*
* Seccomp sandboxing for virtiofsd
*
* Copyright (C) 2019 Red Hat, Inc.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#ifndef VIRTIOFSD_PASSTHROUGH_SECCOMP_H
#define VIRTIOFSD_PASSTHROUGH_SECCOMP_H
void setup_seccomp(bool enable_syslog);
#endif /* VIRTIOFSD_PASSTHROUGH_SECCOMP_H */