static gboolean manage_fuse_st (GIOChannel *source, GIOCondition condition, gpointer data)
{
int res;
char *buf;
gboolean ret;
size_t bufsize;
struct fuse *fuse;
struct fuse_session *se;
struct fuse_chan *ch;
fuse = (struct fuse*) data;
se = fuse_get_session (fuse);
ch = fuse_session_next_chan (se, NULL);
bufsize = fuse_chan_bufsize (ch);
buf = alloca (bufsize);
ret = TRUE;
res = fuse_chan_recv (&ch, buf, bufsize);
if (res == -EINTR)
ret = TRUE;
else if (res <= 0)
ret = FALSE;
else
fuse_session_process (se, buf, res, ch);
return ret;
}
// Do a mount for helper_thread()
static void helper_thread_mount(mount_t * m)
{
Dprintf("%s(\"%s\")\n", __FUNCTION__, m->fstitch_path);
if ((m->channel_fd = fuse_mount(m->mountpoint, &m->args)) == -1)
{
fprintf(stderr, "%s(): fuse_mount(\"%s\") failed. (Does the mountpoint exist?)\n", __FUNCTION__, m->mountpoint);
return;
}
if (!(m->session = fuse_lowlevel_new(&m->args, ops, ops_len, m)))
{
fprintf(stderr, "%s(): fuse_lowlevel_new() failed\n", __FUNCTION__);
return;
}
if (!(m->channel = fuse_kern_chan_new(m->channel_fd)))
{
fprintf(stderr, "%s(): fuse_kern_chan_new() failed\n", __FUNCTION__);
return;
}
fuse_session_add_chan(m->session, m->channel);
if (fuse_chan_bufsize(m->channel) != fuse_serve_mount_chan_bufsize())
fprintf(stderr, "bufsizes differ!\n");
m->mounted = 1;
printf("Mounted \"%s\" from %s\n", m->fstitch_path, modman_name_cfs(m->cfs));
}
static Bool
fuseProcessMessages(void *data)
{
CompDisplay *d = (CompDisplay *)data;
struct fuse_chan *channel;
size_t bufferSize;
int res = 0;
FUSE_DISPLAY(d);
channel = fuse_session_next_chan(fd->session, NULL);
bufferSize = fuse_chan_bufsize(channel);
if (fuse_session_exited(fd->session))
return FALSE;
for (;; )
{
struct fuse_chan *tmpch = channel;
res = fuse_chan_recv(&tmpch, fd->buffer, bufferSize);
if (res == -EINTR)
continue;
if (res > 0)
fuse_session_process(fd->session, fd->buffer, res, tmpch);
break;
}
return TRUE;
}
static int fuse_loop_start_thread(struct fuse_mt *mt)
{
int res;
struct fuse_worker *w = malloc(sizeof(struct fuse_worker));
if (!w) {
fprintf(stderr, "fuse: failed to allocate worker structure\n");
return -1;
}
memset(w, 0, sizeof(struct fuse_worker));
w->bufsize = fuse_chan_bufsize(mt->prevch);
w->buf = malloc(w->bufsize);
w->mt = mt;
if (!w->buf) {
fprintf(stderr, "fuse: failed to allocate read buffer\n");
free(w);
return -1;
}
res = fuse_start_thread(&w->thread_id, fuse_do_work, w);
if (res == -1) {
free(w->buf);
free(w);
return -1;
}
list_add_worker(w, &mt->main);
mt->numavail ++;
mt->numworker ++;
return 0;
}
int fuse_session_loop(struct fuse_session *se)
{
int res = 0;
struct fuse_chan *ch = fuse_session_next_chan(se, NULL);
size_t bufsize = fuse_chan_bufsize(ch);
char *buf = (char *) malloc(bufsize);
if (!buf) {
fprintf(stderr, "fuse: failed to allocate read buffer\n");
return -1;
}
while (!fuse_session_exited(se)) {
struct fuse_chan *tmpch = ch;
res = fuse_chan_recv(&tmpch, buf, bufsize);
if (res == -EINTR)
continue;
if (res <= 0)
break;
fuse_session_process(se, buf, res, tmpch);
}
free(buf);
fuse_session_reset(se);
return res < 0 ? -1 : 0;
}
static gboolean manage_fuse_mt (GIOChannel *source, GIOCondition condition, gpointer data)
{
int res;
char *buf;
size_t bufsize;
struct fuse *fuse;
struct fuse_session *se;
struct fuse_chan *ch;
GThreadPool *pool;
GError *error;
ThreadsData *info;
fuse = (struct fuse*) data;
error = NULL;
pool = g_thread_pool_new (manage_request, fuse, -1, FALSE, &error);
if (pool == NULL) {
g_warning ("Unable to start thread pool: %s", error->message);
g_error_free (error);
return NULL;
}
se = fuse_get_session (fuse);
ch = fuse_session_next_chan (se, NULL);
bufsize = fuse_chan_bufsize (ch);
while (1) {
buf = (char*) malloc (bufsize);
res = fuse_chan_recv (&ch, buf, bufsize);
if (res == -EINTR) {
free (buf);
continue;
}
else if (res <= 0) {
free (buf);
break;
}
info = do_threads_data (buf, res);
error = NULL;
g_thread_pool_push (pool, info, &error);
if (error != NULL) {
g_warning ("Unable to start processing request: %s", error->message);
g_error_free (error);
free_threads_data (info);
}
}
g_thread_pool_free (pool, TRUE, TRUE);
return NULL;
}
static int fuse_start_thread(struct fuse_mt *mt)
{
sigset_t oldset;
sigset_t newset;
int res;
pthread_attr_t attr;
char *stack_size;
struct fuse_worker *w = malloc(sizeof(struct fuse_worker));
if (!w) {
fprintf(stderr, "fuse: failed to allocate worker structure\n");
return -1;
}
memset(w, 0, sizeof(struct fuse_worker));
w->bufsize = fuse_chan_bufsize(mt->prevch);
w->buf = malloc(w->bufsize);
w->mt = mt;
if (!w->buf) {
fprintf(stderr, "fuse: failed to allocate read buffer\n");
free(w);
return -1;
}
/* Override default stack size */
pthread_attr_init(&attr);
stack_size = getenv(ENVNAME_THREAD_STACK);
if (stack_size && pthread_attr_setstacksize(&attr, atoi(stack_size)))
fprintf(stderr, "fuse: invalid stack size: %s\n", stack_size);
/* Disallow signal reception in worker threads */
sigemptyset(&newset);
sigaddset(&newset, SIGTERM);
sigaddset(&newset, SIGINT);
sigaddset(&newset, SIGHUP);
sigaddset(&newset, SIGQUIT);
pthread_sigmask(SIG_BLOCK, &newset, &oldset);
res = pthread_create(&w->thread_id, &attr, fuse_do_work, w);
pthread_sigmask(SIG_SETMASK, &oldset, NULL);
pthread_attr_destroy(&attr);
if (res != 0) {
fprintf(stderr, "fuse: error creating thread: %s\n",
strerror(res));
free(w->buf);
free(w);
return -1;
}
list_add_worker(w, &mt->main);
mt->numavail ++;
mt->numworker ++;
return 0;
}
static void
fuseMount(CompDisplay *d)
{
char *mountPoint;
struct fuse_args args = FUSE_ARGS_INIT(0, NULL);
FUSE_DISPLAY(d);
mountPoint = strdup(fd->opt[FUSE_DISPLAY_OPTION_MOUNT_POINT].value.s);
if (!mountPoint)
return;
fuse_opt_add_arg(&args, "");
fuse_opt_add_arg(&args, "-o");
fuse_opt_add_arg(&args, "allow_root");
fd->channel = fuse_mount(mountPoint, &args);
if (!fd->channel)
{
fuse_opt_free_args(&args);
free(mountPoint);
return;
}
fuse_opt_free_args(&args);
fd->buffer = malloc(fuse_chan_bufsize(fd->channel));
if (!fd->buffer)
{
fuse_unmount(mountPoint, fd->channel);
free(mountPoint);
fd->channel = NULL;
return;
}
fd->mountPoint = mountPoint;
fuse_session_add_chan(fd->session, fd->channel);
fd->watchFdHandle = compAddWatchFd(fuse_chan_fd(fd->channel),
POLLIN | POLLPRI | POLLHUP | POLLERR,
fuseProcessMessages,
d);
}
int
zfsfuse_newfs(char *mntpoint, struct fuse_chan *ch)
{
fuse_fs_info_t info = { 0 };
info.fd = fuse_chan_fd(ch);
info.bufsize = fuse_chan_bufsize(ch);
info.ch = ch;
info.se = fuse_chan_session(ch);
info.mntlen = strlen(mntpoint);
if(write(newfs_fd[1], &info, sizeof(info)) != sizeof(info)) {
perror("Warning (while writing fsinfo to newfs_fd)");
return -1;
}
if(write(newfs_fd[1], mntpoint, info.mntlen) != info.mntlen) {
perror("Warning (while writing mntpoint to newfs_fd)");
return -1;
}
return 0;
}
void cuse_lowlevel_init(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
{
struct fuse_init_in *arg = (struct fuse_init_in *) inarg;
struct cuse_init_out outarg;
struct fuse_ll *f = req->f;
struct cuse_data *cd = f->cuse_data;
size_t bufsize = fuse_chan_bufsize(req->ch);
struct cuse_lowlevel_ops *clop = req_clop(req);
(void) nodeid;
if (f->debug) {
fprintf(stderr, "CUSE_INIT: %u.%u\n", arg->major, arg->minor);
fprintf(stderr, "flags=0x%08x\n", arg->flags);
}
f->conn.proto_major = arg->major;
f->conn.proto_minor = arg->minor;
f->conn.capable = 0;
f->conn.want = 0;
if (arg->major < 7) {
fprintf(stderr, "cuse: unsupported protocol version: %u.%u\n",
arg->major, arg->minor);
fuse_reply_err(req, EPROTO);
return;
}
if (bufsize < FUSE_MIN_READ_BUFFER) {
fprintf(stderr, "cuse: 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);
memset(&outarg, 0, sizeof(outarg));
outarg.major = FUSE_KERNEL_VERSION;
outarg.minor = FUSE_KERNEL_MINOR_VERSION;
outarg.flags = cd->flags;
outarg.max_read = cd->max_read;
outarg.max_write = f->conn.max_write;
outarg.dev_major = cd->dev_major;
outarg.dev_minor = cd->dev_minor;
if (f->debug) {
fprintf(stderr, " CUSE_INIT: %u.%u\n",
outarg.major, outarg.minor);
fprintf(stderr, " flags=0x%08x\n", outarg.flags);
fprintf(stderr, " max_read=0x%08x\n", outarg.max_read);
fprintf(stderr, " max_write=0x%08x\n", outarg.max_write);
fprintf(stderr, " dev_major=%u\n", outarg.dev_major);
fprintf(stderr, " dev_minor=%u\n", outarg.dev_minor);
fprintf(stderr, " dev_info: %.*s\n", cd->dev_info_len,
cd->dev_info);
}
cuse_reply_init(req, &outarg, cd->dev_info, cd->dev_info_len);
if (clop->init_done)
clop->init_done(f->userdata);
fuse_free_req(req);
}
size_t fuse_serve_mount_chan_bufsize(void)
{
assert(root && root->mounted);
return fuse_chan_bufsize(root->channel);
}
/**
* Init of the pseudo fuse thread
@param ch : initial channel
@param se : initial session
@param rozofs_fuse_buffer_count : number of request buffers (corresponds to the number of fuse save context)
@retval 0 on success
@retval -1 on error
*/
int rozofs_fuse_init(struct fuse_chan *ch,struct fuse_session *se,int rozofs_fuse_buffer_count)
{
int status = 0;
// return 0;
int fileflags;
rozofs_fuse_ctx_p = malloc(sizeof (rozofs_fuse_ctx_t));
if (rozofs_fuse_ctx_p == NULL)
{
/*
** cannot allocate memory for fuse rozofs context
*/
return -1;
}
/*
** clear read/write merge stats table
*/
memset(rozofs_write_merge_stats_tab,0,sizeof(uint64_t)*RZ_FUSE_WRITE_MAX);
memset (rozofs_write_buf_section_table,0,sizeof(uint64_t)*ROZOFS_FUSE_NB_OF_BUSIZE_SECTION_MAX);
memset (rozofs_read_buf_section_table,0,sizeof(uint64_t)*ROZOFS_FUSE_NB_OF_BUSIZE_SECTION_MAX);
memset(&rozofs_fuse_read_write_stats_buf,0,sizeof(rozofs_fuse_read_write_stats));
/*
** init of the context
*/
rozofs_fuse_ctx_p->fuseReqPoolRef = NULL;
rozofs_fuse_ctx_p->ch = NULL;
rozofs_fuse_ctx_p->se = se;
rozofs_fuse_ctx_p->bufsize = 0;
rozofs_fuse_ctx_p->buf_fuse_req_p = NULL;
rozofs_fuse_ctx_p->initBufCount = rozofs_fuse_buffer_count;
while (1)
{
/*
** get the receive buffer size for former channel in order to create the request distributor
*/
int bufsize = fuse_chan_bufsize(ch);
rozofs_fuse_ctx_p->bufsize = bufsize;
/*
** create the pool
*/
rozofs_fuse_ctx_p->fuseReqPoolRef = ruc_buf_poolCreate(rozofs_fuse_buffer_count,sizeof(rozofs_fuse_save_ctx_t));
if (rozofs_fuse_ctx_p->fuseReqPoolRef == NULL)
{
ERRLOG "rozofs_fuse_init buffer pool creation error(%d,%d)", (int)rozofs_fuse_buffer_count, (int)sizeof(rozofs_fuse_save_ctx_t) ENDERRLOG ;
status = -1;
break;
}
/*
** allocate a buffer for receiving the fuse request
*/
rozofs_fuse_ctx_p->buf_fuse_req_p = malloc(bufsize);
if (rozofs_fuse_ctx_p == NULL)
{
ERRLOG "rozofs_fuse_init out of memory %d", bufsize ENDERRLOG ;
status = -1;
break;
}
/*
** get the fd of the channel
*/
rozofs_fuse_ctx_p->fd = fuse_chan_fd(ch);
/*
** create a new channel with the specific operation for rozofs (non-blocking)
*/
rozofs_fuse_ctx_p->ch = fuse_chan_new(&rozofs_fuse_ch_ops,fuse_chan_fd(ch),fuse_chan_bufsize(ch),rozofs_fuse_ctx_p);
if (rozofs_fuse_ctx_p->ch == NULL)
{
ERRLOG "rozofs_fuse_init fuse_chan_new error" ENDERRLOG ;
status = -1;
break;
}
/*
** remove the association between the initial session and channel
*/
fuse_session_remove_chan(ch);
/*
** OK, now add the new channel
*/
fuse_session_add_chan(se,rozofs_fuse_ctx_p->ch );
/*
** set the channel in non blocking mode
*/
if((fileflags=fcntl(rozofs_fuse_ctx_p->fd,F_GETFL,0))==-1)
{
RUC_WARNING(errno);
status = -1;
break;
}
if((fcntl(rozofs_fuse_ctx_p->fd,F_SETFL,fileflags|O_NDELAY))==-1)
{
RUC_WARNING(errno);
status = -1;
break;
}
/*
** perform the connection with the socket controller
*/
/*
** OK, we are almost done, just need to connect with the socket controller
*/
rozofs_fuse_ctx_p->connectionId = ruc_sockctl_connect(rozofs_fuse_ctx_p->fd, // Reference of the socket
"rozofs_fuse", // name of the socket
3, // Priority within the socket controller
(void*)rozofs_fuse_ctx_p, // user param for socketcontroller callback
&rozofs_fuse_callBack_sock); // Default callbacks
if (rozofs_fuse_ctx_p->connectionId == NULL)
{
/*
** Fail to connect with the socket controller
*/
RUC_WARNING(-1);
status = -1;
break;
}
status = 0;
break;
}
uma_dbg_addTopic("fuse", rozofs_fuse_show);
return status;
}
static void do_init(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
{
struct fuse_init_in *arg = (struct fuse_init_in *) inarg;
struct fuse_init_out outarg;
struct fuse_ll *f = req->f;
size_t bufsize = fuse_chan_bufsize(req->ch);
(void) nodeid;
if (f->debug) {
fprintf(stderr, "INIT: %u.%u\n", arg->major, arg->minor);
if (arg->major > 7 || (arg->major == 7 && arg->minor >= 6)) {
fprintf(stderr, "flags=0x%08x\n", arg->flags);
fprintf(stderr, "max_readahead=0x%08x\n", arg->max_readahead);
}
}
f->conn.proto_major = arg->major;
f->conn.proto_minor = arg->minor;
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 || (arg->major == 7 && arg->minor >= 6)) {
if (f->conn.async_read)
f->conn.async_read = arg->flags & FUSE_ASYNC_READ;
if (arg->max_readahead < f->conn.max_readahead)
f->conn.max_readahead = arg->max_readahead;
} else {
f->conn.async_read = 0;
f->conn.max_readahead = 0;
}
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);
memset(&outarg, 0, sizeof(outarg));
outarg.major = FUSE_KERNEL_VERSION;
outarg.minor = FUSE_KERNEL_MINOR_VERSION;
if (f->conn.async_read)
outarg.flags |= FUSE_ASYNC_READ;
if (f->op.getlk && f->op.setlk)
outarg.flags |= FUSE_POSIX_LOCKS;
outarg.max_readahead = f->conn.max_readahead;
outarg.max_write = f->conn.max_write;
if (f->debug) {
fprintf(stderr, " INIT: %u.%u\n", outarg.major, outarg.minor);
fprintf(stderr, " flags=0x%08x\n", outarg.flags);
fprintf(stderr, " max_readahead=0x%08x\n", outarg.max_readahead);
fprintf(stderr, " max_write=0x%08x\n", outarg.max_write);
}
send_reply_ok(req, &outarg, arg->minor < 5 ? 8 : sizeof(outarg));
}
static void do_init(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
{
struct fuse_init_in *arg = (struct fuse_init_in *) inarg;
struct fuse_init_out outarg;
struct fuse_ll *f = req->f;
size_t bufsize = fuse_chan_bufsize(req->ch);
(void) nodeid;
if (f->debug) {
fprintf(stderr, "INIT: %u.%u\n", arg->major, arg->minor);
if (arg->major == 7 && arg->minor >= 6) {
fprintf(stderr, "flags=0x%08x\n", arg->flags);
fprintf(stderr, "max_readahead=0x%08x\n",
arg->max_readahead);
}
}
f->conn.proto_major = arg->major;
f->conn.proto_minor = arg->minor;
f->conn.capable = 0;
f->conn.want = 0;
memset(&outarg, 0, sizeof(outarg));
outarg.major = FUSE_KERNEL_VERSION;
outarg.minor = FUSE_KERNEL_MINOR_VERSION;
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 (f->conn.async_read)
f->conn.async_read = arg->flags & FUSE_ASYNC_READ;
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;
} else {
f->conn.async_read = 0;
f->conn.max_readahead = 0;
}
if (f->atomic_o_trunc)
f->conn.want |= FUSE_CAP_ATOMIC_O_TRUNC;
if (f->op.getlk && f->op.setlk && !f->no_remote_lock)
f->conn.want |= FUSE_CAP_POSIX_LOCKS;
if (f->big_writes)
f->conn.want |= FUSE_CAP_BIG_WRITES;
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->conn.async_read || (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;
outarg.max_readahead = f->conn.max_readahead;
outarg.max_write = f->conn.max_write;
if (f->debug) {
fprintf(stderr, " INIT: %u.%u\n", outarg.major, outarg.minor);
fprintf(stderr, " flags=0x%08x\n", outarg.flags);
fprintf(stderr, " max_readahead=0x%08x\n",
outarg.max_readahead);
fprintf(stderr, " max_write=0x%08x\n", outarg.max_write);
}
send_reply_ok(req, &outarg, arg->minor < 5 ? 8 : sizeof(outarg));
}
static void do_init(fuse_req_t req, fuse_ino_t nodeid, const void *inarg)
{
const struct fuse_init_in *arg = (const struct fuse_init_in *) inarg;
struct fuse_init_out outarg;
struct fuse_ll *f = req->f;
size_t bufsize = fuse_chan_bufsize(req->ch);
(void) nodeid;
if (f->debug) {
fprintf(stderr, "INIT: %u.%u\n", arg->major, arg->minor);
if (arg->major > 7 || (arg->major == 7 && arg->minor >= 6)) {
fprintf(stderr, "flags=0x%08x\n", arg->flags);
fprintf(stderr, "max_readahead=0x%08x\n", arg->max_readahead);
}
}
f->conn.proto_major = arg->major;
f->conn.proto_minor = arg->minor;
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 || (arg->major == 7 && arg->minor >= 6)) {
if (f->conn.async_read)
f->conn.async_read = arg->flags & FUSE_ASYNC_READ;
if (arg->max_readahead < f->conn.max_readahead)
f->conn.max_readahead = arg->max_readahead;
#ifdef POSIXACLS
if (arg->flags & FUSE_DONT_MASK)
f->conn.capable |= FUSE_CAP_DONT_MASK;
#endif
} else {
f->conn.async_read = 0;
f->conn.max_readahead = 0;
}
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);
memset(&outarg, 0, sizeof(outarg));
outarg.major = FUSE_KERNEL_VERSION;
/*
* if POSIXACLS is not set, protocol 7.8 provides a good
* compatibility with older kernel modules.
* if POSIXACLS is set, we try to use protocol 7.12 supposed
* to have the ability to process the umask conditionnally,
* but, when using an older kernel module, we fallback to 7.8
*/
#ifdef POSIXACLS
if (arg->major > 7 || (arg->major == 7 && arg->minor >= 12))
outarg.minor = FUSE_KERNEL_MINOR_VERSION;
else
outarg.minor = FUSE_KERNEL_MINOR_FALLBACK;
#else
outarg.minor = FUSE_KERNEL_MINOR_VERSION;
#endif
if (f->conn.async_read)
outarg.flags |= FUSE_ASYNC_READ;
if (f->op.getlk && f->op.setlk)
outarg.flags |= FUSE_POSIX_LOCKS;
#ifdef POSIXACLS
if (f->conn.want & FUSE_CAP_DONT_MASK)
outarg.flags |= FUSE_DONT_MASK;
#endif
outarg.flags |= FUSE_BIG_WRITES ;
outarg.max_readahead = f->conn.max_readahead;
outarg.max_write = f->conn.max_write;
if (f->debug) {
fprintf(stderr, " INIT: %u.%u\n", outarg.major, outarg.minor);
fprintf(stderr, " flags=0x%08x\n", outarg.flags);
fprintf(stderr, " max_readahead=0x%08x\n", outarg.max_readahead);
fprintf(stderr, " max_write=0x%08x\n", outarg.max_write);
}
send_reply_ok(req, &outarg, arg->minor < 5 ? 8 : sizeof(outarg));
}
/**
* Init of the pseudo fuse thread
@param ch : initial channel
@param se : initial session
@param rozofs_fuse_buffer_count : number of request buffers (corresponds to the number of fuse save context)
@retval 0 on success
@retval -1 on error
*/
int rozofs_fuse_init(struct fuse_chan *ch,struct fuse_session *se,int rozofs_fuse_buffer_count)
{
int status = 0;
int i;
// return 0;
fuse_sharemem_init_done = 0;
int fileflags;
rozofs_fuse_ctx_p = malloc(sizeof (rozofs_fuse_ctx_t));
if (rozofs_fuse_ctx_p == NULL)
{
/*
** cannot allocate memory for fuse rozofs context
*/
return -1;
}
memset(rozofs_fuse_ctx_p,0,sizeof (rozofs_fuse_ctx_t));
/*
** clear read/write merge stats table
*/
memset(rozofs_write_merge_stats_tab,0,sizeof(uint64_t)*RZ_FUSE_WRITE_MAX);
memset (rozofs_write_buf_section_table,0,sizeof(uint64_t)*ROZOFS_FUSE_NB_OF_BUSIZE_SECTION_MAX);
memset (rozofs_read_buf_section_table,0,sizeof(uint64_t)*ROZOFS_FUSE_NB_OF_BUSIZE_SECTION_MAX);
memset(&rozofs_fuse_read_write_stats_buf,0,sizeof(rozofs_fuse_read_write_stats));
/*
** init of the context
*/
rozofs_fuse_ctx_p->fuseReqPoolRef = NULL;
rozofs_fuse_ctx_p->ch = NULL;
rozofs_fuse_ctx_p->se = se;
rozofs_fuse_ctx_p->bufsize = 0;
rozofs_fuse_ctx_p->buf_fuse_req_p = NULL;
rozofs_fuse_ctx_p->dir_attr_invalidate = 0;
rozofs_fuse_ctx_p->initBufCount = rozofs_fuse_buffer_count;
while (1)
{
/*
** get the receive buffer size for former channel in order to create the request distributor:
** note: by default the fuse buffer is 4K+128K: for RozoFS the payload can reach 512K (x4)
*/
int bufsize = fuse_chan_bufsize(ch)*4;
rozofs_fuse_ctx_p->bufsize = bufsize;
/*
** create the distributor fro receiving data from fuse kernel
*/
status = rozofs_fuse_init_rcv_buffer_pool(ROZOFS_FUSE_RECV_BUF_COUNT,bufsize);
if (status < 0)
{
severe( "rozofs_fuse_init fuse buffer pool creation error(%d,%d)", (int)ROZOFS_FUSE_RECV_BUF_COUNT, (int)bufsize ) ;
status = -1;
break;
}
/*
** create the pool
*/
rozofs_fuse_ctx_p->fuseReqPoolRef = ruc_buf_poolCreate(rozofs_fuse_buffer_count,sizeof(rozofs_fuse_save_ctx_t));
if (rozofs_fuse_ctx_p->fuseReqPoolRef == NULL)
{
severe( "rozofs_fuse_init buffer pool creation error(%d,%d)", (int)rozofs_fuse_buffer_count, (int)sizeof(rozofs_fuse_save_ctx_t) ) ;
status = -1;
break;
}
ruc_buffer_debug_register_pool("fuseCtx", rozofs_fuse_ctx_p->fuseReqPoolRef);
/*
** Allocate a head of list for queueing pending lookup requests
*/
for (i=0; i< ROZOFS_MAX_LKUP_QUEUE ; i++)
{
ruc_listHdrInit(&rozofs_lookup_queue[i]);
}
/*
** allocate a buffer for receiving the fuse request
*/
rozofs_fuse_ctx_p->buf_fuse_req_p = malloc(bufsize);
if (rozofs_fuse_ctx_p == NULL)
{
severe( "rozofs_fuse_init out of memory %d", bufsize ) ;
status = -1;
break;
}
/*
** get the fd of the channel
*/
rozofs_fuse_ctx_p->fd = fuse_chan_fd(ch);
/*
** wait the end of the share memroy init prior providing it to fuse
*/
while (rozofs_shared_mem_init_done == 0) sleep(1);
/*
** create a new channel with the specific operation for rozofs (non-blocking)
*/
rozofs_fuse_ctx_p->ch = fuse_chan_new(&rozofs_fuse_ch_ops,fuse_chan_fd(ch),bufsize,rozofs_fuse_ctx_p);
if (rozofs_fuse_ctx_p->ch == NULL)
{
severe( "rozofs_fuse_init fuse_chan_new error" ) ;
status = -1;
break;
}
/*
** remove the association between the initial session and channel
*/
fuse_session_remove_chan(ch);
/*
** OK, now add the new channel
*/
fuse_session_add_chan(se,rozofs_fuse_ctx_p->ch );
/*
** set the channel in non blocking mode
*/
if((fileflags=fcntl(rozofs_fuse_ctx_p->fd,F_GETFL,0))==-1)
{
RUC_WARNING(errno);
status = -1;
break;
}
if((fcntl(rozofs_fuse_ctx_p->fd,F_SETFL,fileflags|O_NDELAY))==-1)
{
RUC_WARNING(errno);
status = -1;
break;
}
/*
** send XON to the fuse channel
*/
{
int ret;
rozofs_fuse_ctx_p->ioctl_supported = 1;
rozofs_fuse_ctx_p->data_xon = 1;
while(1)
{
ret = ioctl(rozofs_fuse_ctx_p->fd,1,NULL);
if (ret < 0)
{
warning("ioctl error %s",strerror(errno));
rozofs_fuse_ctx_p->ioctl_supported = 0;
break;
}
if (rozofs_fuse_ctx_p->dir_attr_invalidate == 0)
{
ret = ioctl(rozofs_fuse_ctx_p->fd,3,NULL);
if (ret < 0)
{
warning("ioctl error %s",strerror(errno));
// rozofs_fuse_ctx_p->ioctl_supported = 0;
rozofs_fuse_ctx_p->dir_attr_invalidate = 1;
break;
}
}
break;
}
}
/*
** perform the connection with the socket controller
*/
/*
** OK, we are almost done, just need to connect with the socket controller
*/
rozofs_fuse_ctx_p->connectionId = ruc_sockctl_connect(rozofs_fuse_ctx_p->fd, // Reference of the socket
"rozofs_fuse", // name of the socket
3, // Priority within the socket controller
(void*)rozofs_fuse_ctx_p, // user param for socketcontroller callback
&rozofs_fuse_callBack_sock); // Default callbacks
if (rozofs_fuse_ctx_p->connectionId == NULL)
{
/*
** Fail to connect with the socket controller
*/
RUC_WARNING(-1);
status = -1;
break;
}
rozofs_fuse_get_ticker();
status = 0;
break;
}
/*
** attach the callback on socket controller
*/
//#warning no poller
ruc_sockCtrl_attach_applicative_poller(rozofs_fuse_scheduler_entry_point);
for(i = 0; i < 3;i++) fuse_profile[i] = 0;
uma_dbg_addTopic("fuse", rozofs_fuse_show);
return status;
}