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libfuse cleanup: remove unnecessary files

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This commit is contained in:
Antonio SJ Musumeci 2020-08-01 18:04:13 -04:00
parent f9b831eb1a
commit 5f12fb6a5f
8 changed files with 0 additions and 1277 deletions
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11
libfuse/fuse.pc.in
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@ -1,11 +0,0 @@
prefix=@prefix@
exec_prefix=@exec_prefix@
libdir=@libdir@
includedir=@includedir@
Name: fuse
Description: Filesystem in Userspace
Version: @VERSION@
Libs: -L${libdir} -lfuse -pthread
Libs.private: @libfuse_libs@
Cflags: -I${includedir}/fuse -D_FILE_OFFSET_BITS=64

42
libfuse/lib/Makefile.am
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@ -1,42 +0,0 @@
## Process this file with automake to produce Makefile.in
AUTOMAKE_OPTIONS = subdir-objects
AM_CPPFLAGS = -I$(top_srcdir)/include -DFUSERMOUNT_DIR=\"$(bindir)\" \
-D_FILE_OFFSET_BITS=64 -D_REENTRANT -DFUSE_USE_VERSION=26
lib_LTLIBRARIES = libfuse.la libulockmgr.la
if BSD
mount_source = mount_bsd.c
else
mount_source = mount.c mount_util.c mount_util.h
endif
libfuse_la_SOURCES = \
fuse.c \
fuse_i.h \
fuse_kern_chan.c \
fuse_loop.c \
fuse_loop_mt.c \
fuse_lowlevel.c \
fuse_misc.h \
fuse_mt.c \
fuse_opt.c \
fuse_session.c \
fuse_signals.c \
buffer.c \
cuse_lowlevel.c \
helper.c \
$(mount_source)
libfuse_la_LDFLAGS = -pthread @libfuse_libs@ -version-number 2:9:7 \
-Wl,--version-script,$(srcdir)/fuse_versionscript
if NETBSD
libfuse_la_LIBADD = -lperfuse -lpuffs
endif
libulockmgr_la_SOURCES = ulockmgr.c
libulockmgr_la_LDFLAGS = -pthread -version-number 1:0:1
EXTRA_DIST = fuse_versionscript

207
libfuse/lib/fuse_versionscript
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@ -1,207 +0,0 @@
FUSE_2.2 {
global:
fuse_destroy;
fuse_exit;
fuse_exited;
fuse_invalidate;
fuse_is_lib_option;
fuse_loop;
fuse_loop_mt;
fuse_loop_mt_proc;
fuse_main;
fuse_main_compat1;
fuse_main_compat2;
fuse_mount_compat1;
fuse_new_compat1;
fuse_new_compat2;
fuse_process_cmd;
fuse_read_cmd;
fuse_set_getcontext_func;
fuse_setup_compat2;
};
FUSE_2.4 {
global:
fuse_add_dirent;
fuse_chan_bufsize;
fuse_chan_data;
fuse_chan_destroy;
fuse_chan_fd;
fuse_chan_receive;
fuse_chan_send;
fuse_chan_session;
fuse_dirent_size;
fuse_kern_chan_new;
fuse_lowlevel_is_lib_option;
fuse_reply_attr;
fuse_reply_buf;
fuse_reply_entry;
fuse_reply_err;
fuse_reply_none;
fuse_reply_readlink;
fuse_reply_write;
fuse_reply_xattr;
fuse_req_userdata;
fuse_session_add_chan;
fuse_session_destroy;
fuse_session_exit;
fuse_session_exited;
fuse_session_loop;
fuse_session_loop_mt;
fuse_session_new;
fuse_session_next_chan;
fuse_session_process;
fuse_session_reset;
} FUSE_2.2;
FUSE_2.5 {
global:
fuse_lowlevel_new_compat;
fuse_main_real_compat22;
fuse_mount_compat22;
fuse_new_compat22;
fuse_opt_parse;
fuse_opt_add_opt;
fuse_opt_add_arg;
fuse_opt_free_args;
fuse_opt_match;
fuse_parse_cmdline;
fuse_remove_signal_handlers;
fuse_reply_create;
fuse_reply_open;
fuse_reply_open_compat;
fuse_reply_statfs;
fuse_reply_statfs_compat;
fuse_setup_compat22;
fuse_set_signal_handlers;
} FUSE_2.4;
FUSE_2.6 {
global:
fuse_add_direntry;
fuse_chan_new;
fuse_chan_new_compat24;
fuse_chan_recv;
fuse_daemonize;
fuse_get_session;
fuse_interrupted;
fuse_lowlevel_new;
fuse_lowlevel_new_compat25;
fuse_main_real;
fuse_main_real_compat25;
fuse_mount;
fuse_mount_compat25;
fuse_new;
fuse_new_compat25;
fuse_opt_insert_arg;
fuse_reply_lock;
fuse_req_interrupt_func;
fuse_req_interrupted;
fuse_session_remove_chan;
fuse_setup;
fuse_setup_compat25;
fuse_teardown;
fuse_teardown_compat22;
fuse_unmount;
fuse_unmount_compat22;
} FUSE_2.5;
FUSE_2.7 {
global:
fuse_fs_access;
fuse_fs_bmap;
fuse_fs_chmod;
fuse_fs_chown;
fuse_fs_create;
fuse_fs_destroy;
fuse_fs_fgetattr;
fuse_fs_flush;
fuse_fs_fsync;
fuse_fs_fsyncdir;
fuse_fs_ftruncate;
fuse_fs_getattr;
fuse_fs_getxattr;
fuse_fs_init;
fuse_fs_link;
fuse_fs_listxattr;
fuse_fs_lock;
fuse_fs_mkdir;
fuse_fs_mknod;
fuse_fs_new;
fuse_fs_open;
fuse_fs_opendir;
fuse_fs_read;
fuse_fs_readdir;
fuse_fs_readlink;
fuse_fs_release;
fuse_fs_releasedir;
fuse_fs_removexattr;
fuse_fs_rename;
fuse_fs_rmdir;
fuse_fs_setxattr;
fuse_fs_statfs;
fuse_fs_symlink;
fuse_fs_truncate;
fuse_fs_unlink;
fuse_fs_utimens;
fuse_fs_write;
fuse_register_module;
fuse_reply_iov;
fuse_version;
} FUSE_2.6;
FUSE_2.7.5 {
global:
fuse_reply_bmap;
} FUSE_2.7;
FUSE_2.8 {
global:
cuse_lowlevel_new;
cuse_lowlevel_main;
cuse_lowlevel_setup;
cuse_lowlevel_teardown;
fuse_fs_ioctl;
fuse_fs_poll;
fuse_get_context;
fuse_getgroups;
fuse_lowlevel_notify_inval_entry;
fuse_lowlevel_notify_inval_inode;
fuse_lowlevel_notify_poll;
fuse_notify_poll;
fuse_opt_add_opt_escaped;
fuse_pollhandle_destroy;
fuse_reply_ioctl;
fuse_reply_ioctl_iov;
fuse_reply_ioctl_retry;
fuse_reply_poll;
fuse_req_ctx;
fuse_req_getgroups;
fuse_session_data;
} FUSE_2.7.5;
FUSE_2.9 {
global:
fuse_buf_copy;
fuse_buf_size;
fuse_fs_read_buf;
fuse_fs_write_buf;
fuse_lowlevel_notify_retrieve;
fuse_lowlevel_notify_store;
fuse_reply_data;
fuse_session_process_buf;
fuse_session_receive_buf;
fuse_start_cleanup_thread;
fuse_stop_cleanup_thread;
fuse_clean_cache;
fuse_lowlevel_notify_delete;
fuse_fs_flock;
} FUSE_2.8;
FUSE_2.9.1 {
global:
fuse_fs_fallocate;
local:
*;
} FUSE_2.9;

444
libfuse/lib/ulockmgr.c
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@ -1,444 +0,0 @@
/*
libulockmgr: Userspace Lock Manager Library
Copyright (C) 2006 Miklos Szeredi <miklos@szeredi.hu>
This program can be distributed under the terms of the GNU LGPLv2.
See the file COPYING.LIB
*/
/* #define DEBUG 1 */
#include "ulockmgr.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <pthread.h>
#include <errno.h>
#include <assert.h>
#include <signal.h>
#include <sys/stat.h>
#include <sys/socket.h>
#include <sys/wait.h>
struct message {
unsigned intr : 1;
unsigned nofd : 1;
pthread_t thr;
int cmd;
int fd;
struct flock lock;
int error;
};
struct fd_store {
struct fd_store *next;
int fd;
int inuse;
};
struct owner {
struct owner *next;
struct owner *prev;
struct fd_store *fds;
void *id;
size_t id_len;
int cfd;
};
static pthread_mutex_t ulockmgr_lock;
static int ulockmgr_cfd = -1;
static struct owner owner_list = { .next = &owner_list, .prev = &owner_list };
#define MAX_SEND_FDS 2
static void list_del_owner(struct owner *owner)
{
struct owner *prev = owner->prev;
struct owner *next = owner->next;
prev->next = next;
next->prev = prev;
}
static void list_add_owner(struct owner *owner, struct owner *next)
{
struct owner *prev = next->prev;
owner->next = next;
owner->prev = prev;
prev->next = owner;
next->prev = owner;
}
/*
* There's a bug in the linux kernel (< 2.6.22) recv() implementation
* on AF_UNIX, SOCK_STREAM sockets, that could cause it to return
* zero, even if data was available. Retrying the recv will return
* the data in this case.
*/
static int do_recv(int sock, void *buf, size_t len, int flags)
{
int res = recv(sock, buf, len, flags);
if (res == 0)
res = recv(sock, buf, len, flags);
return res;
}
static int ulockmgr_send_message(int sock, void *buf, size_t buflen,
int *fdp, int numfds)
{
struct msghdr msg;
struct cmsghdr *p_cmsg;
struct iovec vec;
size_t cmsgbuf[CMSG_SPACE(sizeof(int) * MAX_SEND_FDS) / sizeof(size_t)];
int res;
assert(numfds <= MAX_SEND_FDS);
msg.msg_control = cmsgbuf;
msg.msg_controllen = sizeof(cmsgbuf);
p_cmsg = CMSG_FIRSTHDR(&msg);
p_cmsg->cmsg_level = SOL_SOCKET;
p_cmsg->cmsg_type = SCM_RIGHTS;
p_cmsg->cmsg_len = CMSG_LEN(sizeof(int) * numfds);
memcpy(CMSG_DATA(p_cmsg), fdp, sizeof(int) * numfds);
msg.msg_controllen = p_cmsg->cmsg_len;
msg.msg_name = NULL;
msg.msg_namelen = 0;
msg.msg_iov = &vec;
msg.msg_iovlen = 1;
msg.msg_flags = 0;
vec.iov_base = buf;
vec.iov_len = buflen;
res = sendmsg(sock, &msg, MSG_NOSIGNAL);
if (res == -1) {
perror("libulockmgr: sendmsg");
return -1;
}
if ((size_t) res != buflen) {
fprintf(stderr, "libulockmgr: sendmsg short\n");
return -1;
}
return 0;
}
static int ulockmgr_start_daemon(void)
{
int sv[2];
int res;
char tmp[64];
res = socketpair(AF_UNIX, SOCK_STREAM, 0, sv);
if (res == -1) {
perror("libulockmgr: socketpair");
return -1;
}
snprintf(tmp, sizeof(tmp), "exec ulockmgr_server %i", sv[0]);
res = system(tmp);
close(sv[0]);
if (res == -1 || !WIFEXITED(res) || WEXITSTATUS(res) != 0) {
close(sv[1]);
return -1;
}
ulockmgr_cfd = sv[1];
return 0;
}
static struct owner *ulockmgr_new_owner(const void *id, size_t id_len)
{
int sv[2];
int res;
char c = 'm';
struct owner *o;
if (ulockmgr_cfd == -1 && ulockmgr_start_daemon() == -1)
return NULL;
o = calloc(1, sizeof(struct owner) + id_len);
if (!o) {
fprintf(stderr, "libulockmgr: failed to allocate memory\n");
return NULL;
}
o->id = o + 1;
o->id_len = id_len;
res = socketpair(AF_UNIX, SOCK_STREAM, 0, sv);
if (res == -1) {
perror("libulockmgr: socketpair");
goto out_free;
}
res = ulockmgr_send_message(ulockmgr_cfd, &c, sizeof(c), &sv[0], 1);
close(sv[0]);
if (res == -1) {
close(ulockmgr_cfd);
ulockmgr_cfd = -1;
goto out_close;
}
o->cfd = sv[1];
memcpy(o->id, id, id_len);
list_add_owner(o, &owner_list);
return o;
out_close:
close(sv[1]);
out_free:
free(o);
return NULL;
}
static int ulockmgr_send_request(struct message *msg, const void *id,
size_t id_len)
{
int sv[2];
int cfd;
struct owner *o;
struct fd_store *f = NULL;
struct fd_store *newf = NULL;
struct fd_store **fp;
int fd = msg->fd;
int cmd = msg->cmd;
int res;
int unlockall = (cmd == F_SETLK && msg->lock.l_type == F_UNLCK &&
msg->lock.l_start == 0 && msg->lock.l_len == 0);
for (o = owner_list.next; o != &owner_list; o = o->next)
if (o->id_len == id_len && memcmp(o->id, id, id_len) == 0)
break;
if (o == &owner_list)
o = NULL;
if (!o && cmd != F_GETLK && msg->lock.l_type != F_UNLCK)
o = ulockmgr_new_owner(id, id_len);
if (!o) {
if (cmd == F_GETLK) {
res = fcntl(msg->fd, F_GETLK, &msg->lock);
return (res == -1) ? -errno : 0;
} else if (msg->lock.l_type == F_UNLCK)
return 0;
else
return -ENOLCK;
}
if (unlockall)
msg->nofd = 1;
else {
for (fp = &o->fds; *fp; fp = &(*fp)->next) {
f = *fp;
if (f->fd == fd) {
msg->nofd = 1;
break;
}
}
}
if (!msg->nofd) {
newf = f = calloc(1, sizeof(struct fd_store));
if (!f) {
fprintf(stderr, "libulockmgr: failed to allocate memory\n");
return -ENOLCK;
}
}
res = socketpair(AF_UNIX, SOCK_STREAM, 0, sv);
if (res == -1) {
perror("libulockmgr: socketpair");
free(newf);
return -ENOLCK;
}
cfd = sv[1];
sv[1] = msg->fd;
res = ulockmgr_send_message(o->cfd, msg, sizeof(struct message), sv,
msg->nofd ? 1 : 2);
close(sv[0]);
if (res == -1) {
free(newf);
close(cfd);
return -EIO;
}
if (newf) {
newf->fd = msg->fd;
newf->next = o->fds;
o->fds = newf;
}
if (f)
f->inuse++;
res = do_recv(cfd, msg, sizeof(struct message), MSG_WAITALL);
if (res == -1) {
perror("libulockmgr: recv");
msg->error = EIO;
} else if (res != sizeof(struct message)) {
fprintf(stderr, "libulockmgr: recv short\n");
msg->error = EIO;
} else if (cmd == F_SETLKW && msg->error == EAGAIN) {
pthread_mutex_unlock(&ulockmgr_lock);
while (1) {
sigset_t old;
sigset_t unblock;
int errno_save;
sigemptyset(&unblock);
sigaddset(&unblock, SIGUSR1);
pthread_sigmask(SIG_UNBLOCK, &unblock, &old);
res = do_recv(cfd, msg, sizeof(struct message),
MSG_WAITALL);
errno_save = errno;
pthread_sigmask(SIG_SETMASK, &old, NULL);
if (res == sizeof(struct message))
break;
else if (res >= 0) {
fprintf(stderr, "libulockmgr: recv short\n");
msg->error = EIO;
break;
} else if (errno_save != EINTR) {
errno = errno_save;
perror("libulockmgr: recv");
msg->error = EIO;
break;
}
msg->intr = 1;
res = send(o->cfd, msg, sizeof(struct message),
MSG_NOSIGNAL);
if (res == -1) {
perror("libulockmgr: send");
msg->error = EIO;
break;
}
if (res != sizeof(struct message)) {
fprintf(stderr, "libulockmgr: send short\n");
msg->error = EIO;
break;
}
}
pthread_mutex_lock(&ulockmgr_lock);
}
if (f)
f->inuse--;
close(cfd);
if (unlockall) {
for (fp = &o->fds; *fp;) {
f = *fp;
if (f->fd == fd && !f->inuse) {
*fp = f->next;
free(f);
} else
fp = &f->next;
}
if (!o->fds) {
list_del_owner(o);
close(o->cfd);
free(o);
}
/* Force OK on unlock-all, since it _will_ succeed once the
owner is deleted */
msg->error = 0;
}
return -msg->error;
}
#ifdef DEBUG
static uint32_t owner_hash(const unsigned char *id, size_t id_len)
{
uint32_t h = 0;
size_t i;
for (i = 0; i < id_len; i++)
h = ((h << 8) | (h >> 24)) ^ id[i];
return h;
}
#endif
static int ulockmgr_canonicalize(int fd, struct flock *lock)
{
off_t offset;
if (lock->l_whence == SEEK_CUR) {
offset = lseek(fd, 0, SEEK_CUR);
if (offset == (off_t) -1)
return -errno;
} else if (lock->l_whence == SEEK_END) {
struct stat stbuf;
int res = fstat(fd, &stbuf);
if (res == -1)
return -errno;
offset = stbuf.st_size;
} else
offset = 0;
lock->l_whence = SEEK_SET;
lock->l_start += offset;
if (lock->l_start < 0)
return -EINVAL;
if (lock->l_len < 0) {
lock->l_start += lock->l_len;
if (lock->l_start < 0)
return -EINVAL;
lock->l_len = -lock->l_len;
}
if (lock->l_len && lock->l_start + lock->l_len - 1 < 0)
return -EINVAL;
return 0;
}
int ulockmgr_op(int fd, int cmd, struct flock *lock, const void *owner,
size_t owner_len)
{
int err;
struct message msg;
sigset_t old;
sigset_t block;
if (cmd != F_GETLK && cmd != F_SETLK && cmd != F_SETLKW)
return -EINVAL;
if (lock->l_type != F_RDLCK && lock->l_type != F_WRLCK &&
lock->l_type != F_UNLCK)
return -EINVAL;
if (lock->l_whence != SEEK_SET && lock->l_whence != SEEK_CUR &&
lock->l_whence != SEEK_END)
return -EINVAL;
#ifdef DEBUG
fprintf(stderr, "libulockmgr: %i %i %i %lli %lli own: 0x%08x\n",
cmd, lock->l_type, lock->l_whence, lock->l_start, lock->l_len,
owner_hash(owner, owner_len));
#endif
/* Unlock should never block anyway */
if (cmd == F_SETLKW && lock->l_type == F_UNLCK)
cmd = F_SETLK;
memset(&msg, 0, sizeof(struct message));
msg.cmd = cmd;
msg.fd = fd;
msg.lock = *lock;
err = ulockmgr_canonicalize(fd, &msg.lock);
if (err)
return err;
sigemptyset(&block);
sigaddset(&block, SIGUSR1);
pthread_sigmask(SIG_BLOCK, &block, &old);
pthread_mutex_lock(&ulockmgr_lock);
err = ulockmgr_send_request(&msg, owner, owner_len);
pthread_mutex_unlock(&ulockmgr_lock);
pthread_sigmask(SIG_SETMASK, &old, NULL);
if (!err && cmd == F_GETLK) {
if (msg.lock.l_type == F_UNLCK)
lock->l_type = F_UNLCK;
else
*lock = msg.lock;
}
return err;
}

58
libfuse/util/Makefile.am
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@ -1,58 +0,0 @@
## Process this file with automake to produce Makefile.in
AM_CPPFLAGS = -D_FILE_OFFSET_BITS=64
bin_PROGRAMS = fusermount ulockmgr_server
noinst_PROGRAMS = mount.fuse
# we re-use mount_util.c from the library, but do want to keep ourself
# as stand-alone as possible. in order to make an out-of-source build
# possible, we "generate" the file from its original location by
# copying it over.
fusermount_SOURCES = fusermount.c mount_util.c
fusermount_CPPFLAGS = -I$(top_srcdir)/lib
BUILT_SOURCES = mount_util.c
mount_util.c: $(top_srcdir)/lib/mount_util.c
@cp $(top_srcdir)/lib/mount_util.c .
mount_fuse_SOURCES = mount.fuse.c
ulockmgr_server_SOURCES = ulockmgr_server.c
ulockmgr_server_CPPFLAGS = -D_FILE_OFFSET_BITS=64 -D_REENTRANT
ulockmgr_server_LDFLAGS = -pthread
install-exec-hook:
-chmod u+s $(DESTDIR)$(bindir)/fusermount
@if test ! -e $(DESTDIR)/dev/fuse; then \
$(MKDIR_P) $(DESTDIR)/dev; \
echo "mknod $(DESTDIR)/dev/fuse -m 0666 c 10 229 || true"; \
mknod $(DESTDIR)/dev/fuse -m 0666 c 10 229 || true; \
fi
EXTRA_DIST = udev.rules init_script
MOUNT_FUSE_PATH = @MOUNT_FUSE_PATH@
UDEV_RULES_PATH = @UDEV_RULES_PATH@
INIT_D_PATH = @INIT_D_PATH@
install-exec-local:
$(MKDIR_P) $(DESTDIR)$(MOUNT_FUSE_PATH)
$(INSTALL_PROGRAM) $(builddir)/mount.fuse $(DESTDIR)$(MOUNT_FUSE_PATH)/mount.fuse
$(MKDIR_P) $(DESTDIR)$(INIT_D_PATH)
$(INSTALL_SCRIPT) $(srcdir)/init_script $(DESTDIR)$(INIT_D_PATH)/fuse
@if test -x /usr/sbin/update-rc.d; then \
echo "/usr/sbin/update-rc.d fuse start 34 S . start 41 0 6 . || true"; \
/usr/sbin/update-rc.d fuse start 34 S . start 41 0 6 . || true; \
fi
install-data-local:
$(MKDIR_P) $(DESTDIR)$(UDEV_RULES_PATH)
$(INSTALL_DATA) $(srcdir)/udev.rules $(DESTDIR)$(UDEV_RULES_PATH)/99-fuse.rules
uninstall-local:
rm -f $(DESTDIR)$(MOUNT_FUSE_PATH)/mount.fuse
rm -f $(DESTDIR)$(UDEV_RULES_PATH)/99-fuse.rules
rm -f $(DESTDIR)$(INIT_D_PATH)/fuse
@if test -x /usr/sbin/update-rc.d; then \
echo "/usr/sbin/update-rc.d fuse remove || true"; \
/usr/sbin/update-rc.d fuse remove || true; \
fi

89
libfuse/util/init_script
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@ -1,89 +0,0 @@
#! /bin/sh
### BEGIN INIT INFO
# Provides: fuse
# Required-Start:
# Should-Start: udev
# Required-Stop:
# Default-Start: S
# Default-Stop:
# Short-Description: Start and stop fuse.
# Description: Load the fuse module and mount the fuse control
# filesystem.
### END INIT INFO
set -e
PATH=/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin
MOUNTPOINT=/sys/fs/fuse/connections
# Gracefully exit if the package has been removed.
which fusermount &>/dev/null || exit 5
case "$1" in
start|restart|force-reload)
if ! grep -qw fuse /proc/filesystems; then
echo -n "Loading fuse module"
if ! modprobe fuse >/dev/null 2>&1; then
echo " failed!"
exit 1
else
echo "."
fi
else
echo "Fuse filesystem already available."
fi
if grep -qw fusectl /proc/filesystems && \
! grep -qw $MOUNTPOINT /proc/mounts; then
echo -n "Mounting fuse control filesystem"
if ! mount -t fusectl fusectl $MOUNTPOINT >/dev/null 2>&1; then
echo " failed!"
exit 1
else
echo "."
fi
else
echo "Fuse control filesystem already available."
fi
;;
stop)
if ! grep -qw fuse /proc/filesystems; then
echo "Fuse filesystem not loaded."
exit 7
fi
if grep -qw $MOUNTPOINT /proc/mounts; then
echo -n "Unmounting fuse control filesystem"
if ! umount $MOUNTPOINT >/dev/null 2>&1; then
echo " failed!"
else
echo "."
fi
else
echo "Fuse control filesystem not mounted."
fi
if grep -qw "^fuse" /proc/modules; then
echo -n "Unloading fuse module"
if ! rmmod fuse >/dev/null 2>&1; then
echo " failed!"
else
echo "."
fi
else
echo "Fuse module not loaded."
fi
;;
status)
echo -n "Checking fuse filesystem"
if ! grep -qw fuse /proc/filesystems; then
echo " not available."
exit 3
else
echo " ok."
fi
;;
*)
echo "Usage: $0 {start|stop|restart|force-reload|status}"
exit 1
;;
esac
exit 0

1
libfuse/util/udev.rules
View File

@ -1 +0,0 @@
KERNEL=="fuse", MODE="0666"

425
libfuse/util/ulockmgr_server.c
View File

@ -1,425 +0,0 @@
/*
ulockmgr_server: Userspace Lock Manager Server
Copyright (C) 2006 Miklos Szeredi <miklos@szeredi.hu>
This program can be distributed under the terms of the GNU GPL.
See the file COPYING.
*/
/* #define DEBUG 1 */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <dirent.h>
#include <pthread.h>
#include <stdint.h>
#include <errno.h>
#include <assert.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/wait.h>
struct message {
unsigned intr : 1;
unsigned nofd : 1;
pthread_t thr;
int cmd;
int fd;
struct flock lock;
int error;
};
struct fd_store {
struct fd_store *next;
int fd;
int origfd;
int inuse;
};
struct owner {
struct fd_store *fds;
pthread_mutex_t lock;
};
struct req_data {
struct owner *o;
int cfd;
struct fd_store *f;
struct message msg;
};
#define MAX_SEND_FDS 2
static int receive_message(int sock, void *buf, size_t buflen, int *fdp,
int *numfds)
{
struct msghdr msg;
struct iovec iov;
size_t ccmsg[CMSG_SPACE(sizeof(int) * MAX_SEND_FDS) / sizeof(size_t)];
struct cmsghdr *cmsg;
int res;
int i;
assert(*numfds <= MAX_SEND_FDS);
iov.iov_base = buf;
iov.iov_len = buflen;
memset(&msg, 0, sizeof(msg));
memset(ccmsg, -1, sizeof(ccmsg));
msg.msg_iov = &iov;
msg.msg_iovlen = 1;
msg.msg_control = ccmsg;
msg.msg_controllen = sizeof(ccmsg);
res = recvmsg(sock, &msg, MSG_WAITALL);
if (!res) {
/* retry on zero return, see do_recv() in ulockmgr.c */
res = recvmsg(sock, &msg, MSG_WAITALL);
if (!res)
return 0;
}
if (res == -1) {
perror("ulockmgr_server: recvmsg");
return -1;
}
if ((size_t) res != buflen) {
fprintf(stderr, "ulockmgr_server: short message received\n");
return -1;
}
cmsg = CMSG_FIRSTHDR(&msg);
if (cmsg) {
if (cmsg->cmsg_type != SCM_RIGHTS) {
fprintf(stderr,
"ulockmgr_server: unknown control message %d\n",
cmsg->cmsg_type);
return -1;
}
memcpy(fdp, CMSG_DATA(cmsg), sizeof(int) * *numfds);
if (msg.msg_flags & MSG_CTRUNC) {
fprintf(stderr,
"ulockmgr_server: control message truncated\n");
for (i = 0; i < *numfds; i++)
close(fdp[i]);
*numfds = 0;
}
} else {
if (msg.msg_flags & MSG_CTRUNC) {
fprintf(stderr,
"ulockmgr_server: control message truncated(*)\n");
/* There's a bug in the Linux kernel, that if
not all file descriptors were allocated,
then the cmsg header is not filled in */
cmsg = (struct cmsghdr *) ccmsg;
memcpy(fdp, CMSG_DATA(cmsg), sizeof(int) * *numfds);
for (i = 0; i < *numfds; i++)
close(fdp[i]);
}
*numfds = 0;
}
return res;
}
static int closefrom(int minfd)
{
DIR *dir = opendir("/proc/self/fd");
if (dir) {
int dfd = dirfd(dir);
struct dirent *ent;
while ((ent = readdir(dir))) {
char *end;
int fd = strtol(ent->d_name, &end, 10);
if (ent->d_name[0] && !end[0] && fd >= minfd &&
fd != dfd)
close(fd);
}
closedir(dir);
}
return 0;
}
static void send_reply(int cfd, struct message *msg)
{
int res = send(cfd, msg, sizeof(struct message), MSG_NOSIGNAL);
if (res == -1)
perror("ulockmgr_server: sending reply");
#ifdef DEBUG
fprintf(stderr, "ulockmgr_server: error: %i\n", msg->error);
#endif
}
static void *process_request(void *d_)
{
struct req_data *d = d_;
int res;
assert(d->msg.cmd == F_SETLKW);
res = fcntl(d->f->fd, F_SETLK, &d->msg.lock);
if (res == -1 && errno == EAGAIN) {
d->msg.error = EAGAIN;
d->msg.thr = pthread_self();
send_reply(d->cfd, &d->msg);
res = fcntl(d->f->fd, F_SETLKW, &d->msg.lock);
}
d->msg.error = (res == -1) ? errno : 0;
pthread_mutex_lock(&d->o->lock);
d->f->inuse--;
pthread_mutex_unlock(&d->o->lock);
send_reply(d->cfd, &d->msg);
close(d->cfd);
free(d);
return NULL;
}
static void process_message(struct owner *o, struct message *msg, int cfd,
int fd)
{
struct fd_store *f = NULL;
struct fd_store *newf = NULL;
struct fd_store **fp;
struct req_data *d;
pthread_t tid;
int res;
#ifdef DEBUG
fprintf(stderr, "ulockmgr_server: %i %i %i %lli %lli\n",
msg->cmd, msg->lock.l_type, msg->lock.l_whence,
msg->lock.l_start, msg->lock.l_len);
#endif
if (msg->cmd == F_SETLK && msg->lock.l_type == F_UNLCK &&
msg->lock.l_start == 0 && msg->lock.l_len == 0) {
for (fp = &o->fds; *fp;) {
f = *fp;
if (f->origfd == msg->fd && !f->inuse) {
close(f->fd);
*fp = f->next;
free(f);
} else
fp = &f->next;
}
if (!msg->nofd)
close(fd);
msg->error = 0;
send_reply(cfd, msg);
close(cfd);
return;
}
if (msg->nofd) {
for (fp = &o->fds; *fp; fp = &(*fp)->next) {
f = *fp;
if (f->origfd == msg->fd)
break;
}
if (!*fp) {
fprintf(stderr, "ulockmgr_server: fd %i not found\n",
msg->fd);
msg->error = EIO;
send_reply(cfd, msg);
close(cfd);
return;
}
} else {
newf = f = malloc(sizeof(struct fd_store));
if (!f) {
msg->error = ENOLCK;
send_reply(cfd, msg);
close(cfd);
return;
}
f->fd = fd;
f->origfd = msg->fd;
f->inuse = 0;
}
if (msg->cmd == F_GETLK || msg->cmd == F_SETLK ||
msg->lock.l_type == F_UNLCK) {
res = fcntl(f->fd, msg->cmd, &msg->lock);
msg->error = (res == -1) ? errno : 0;
send_reply(cfd, msg);
close(cfd);
if (newf) {
newf->next = o->fds;
o->fds = newf;
}
return;
}
d = malloc(sizeof(struct req_data));
if (!d) {
msg->error = ENOLCK;
send_reply(cfd, msg);
close(cfd);
free(newf);
return;
}
f->inuse++;
d->o = o;
d->cfd = cfd;
d->f = f;
d->msg = *msg;
res = pthread_create(&tid, NULL, process_request, d);
if (res) {
msg->error = ENOLCK;
send_reply(cfd, msg);
close(cfd);
free(d);
f->inuse--;
free(newf);
return;
}
if (newf) {
newf->next = o->fds;
o->fds = newf;
}
pthread_detach(tid);
}
static void sigusr1_handler(int sig)
{
(void) sig;
/* Nothing to do */
}
static void process_owner(int cfd)
{
struct owner o;
struct sigaction sa;
memset(&sa, 0, sizeof(struct sigaction));
sa.sa_handler = sigusr1_handler;
sigemptyset(&sa.sa_mask);
if (sigaction(SIGUSR1, &sa, NULL) == -1) {
perror("ulockmgr_server: cannot set sigusr1 signal handler");
exit(1);
}
memset(&o, 0, sizeof(struct owner));
pthread_mutex_init(&o.lock, NULL);
while (1) {
struct message msg;
int rfds[2];
int res;
int numfds = 2;
res = receive_message(cfd, &msg, sizeof(msg), rfds, &numfds);
if (!res)
break;
if (res == -1)
exit(1);
if (msg.intr) {
if (numfds != 0)
fprintf(stderr,
"ulockmgr_server: too many fds for intr\n");
pthread_kill(msg.thr, SIGUSR1);
} else {
if (numfds != 2)
continue;
pthread_mutex_lock(&o.lock);
process_message(&o, &msg, rfds[0], rfds[1]);
pthread_mutex_unlock(&o.lock);
}
}
if (o.fds)
fprintf(stderr,
"ulockmgr_server: open file descriptors on exit\n");
}
int main(int argc, char *argv[])
{
int nullfd;
char *end;
int cfd;
sigset_t empty;
if (argc != 2 || !argv[1][0])
goto out_inval;
cfd = strtol(argv[1], &end, 10);
if (*end)
goto out_inval;
/* demonize current process */
switch(fork()) {
case -1:
perror("ulockmgr_server: fork");
exit(1);
case 0:
break;
default:
_exit(0);
}
if (setsid() == -1) {
perror("ulockmgr_server: setsid");
exit(1);
}
(void) chdir("/");
sigemptyset(&empty);
sigprocmask(SIG_SETMASK, &empty, NULL);
if (dup2(cfd, 4) == -1) {
perror("ulockmgr_server: dup2");
exit(1);
}
cfd = 4;
nullfd = open("/dev/null", O_RDWR);
if (nullfd >= 0) {
dup2(nullfd, 0);
dup2(nullfd, 1);
}
close(3);
closefrom(5);
while (1) {
char c;
int sock;
int pid;
int numfds = 1;
int res = receive_message(cfd, &c, sizeof(c), &sock, &numfds);
if (!res)
break;
if (res == -1)
exit(1);
assert(numfds == 1);
pid = fork();
if (pid == -1) {
perror("ulockmgr_server: fork");
close(sock);
continue;
}
if (pid == 0) {
close(cfd);
pid = fork();
if (pid == -1) {
perror("ulockmgr_server: fork");
_exit(1);
}
if (pid == 0)
process_owner(sock);
_exit(0);
}
waitpid(pid, NULL, 0);
close(sock);
}
return 0;
out_inval:
fprintf(stderr, "%s should be started by libulockmgr\n", argv[0]);
return 1;
}