static char *read_link(struct dentry *dentry)
{
struct _inode *inode = d_get_inode(dentry);
struct fuse_conn *fc = get_fuse_conn(inode);
struct fuse_req *req = fuse_get_req(fc);
char *link;
if (IS_ERR(req))
return ERR_PTR(PTR_ERR(req));
link = (char *) __get_free_page(GFP_KERNEL);
if (!link) {
link = ERR_PTR(-ENOMEM);
goto out;
}
req->in.h.opcode = FUSE_READLINK;
req->in.h.nodeid = _get_node_id(inode);
req->out.argvar = 1;
req->out.numargs = 1;
req->out.args[0].size = PAGE_SIZE - 1;
req->out.args[0].value = link;
request_send(fc, req);
if (req->out.h.error) {
free_page((unsigned long) link);
link = ERR_PTR(req->out.h.error);
} else
link[req->out.args[0].size] = '\0';
out:
fuse_put_request(fc, req);
fuse_invalidate_attr(inode); /* atime changed */
return link;
}
static int request_io(struct knot_requestor *req, struct knot_request *last,
struct timeval *timeout)
{
int ret = KNOT_EOK;
knot_pkt_t *query = last->query;
knot_pkt_t *resp = last->resp;
/* Data to be sent. */
if (req->overlay.state == KNOT_STATE_PRODUCE) {
/* Process query and send it out. */
knot_overlay_produce(&req->overlay, query);
if (req->overlay.state == KNOT_STATE_CONSUME) {
ret = request_send(last, timeout);
if (ret != KNOT_EOK) {
return ret;
}
}
}
/* Data to be read. */
if (req->overlay.state == KNOT_STATE_CONSUME) {
/* Read answer and process it. */
ret = request_recv(last, timeout);
if (ret < 0) {
return ret;
}
(void) knot_pkt_parse(resp, 0);
knot_overlay_consume(&req->overlay, resp);
}
return KNOT_EOK;
}
static size_t fuse_send_write(struct fuse_req *req, struct file *file,
struct inode *inode, loff_t pos, size_t count)
{
struct fuse_conn *fc = get_fuse_conn(inode);
struct fuse_file *ff = file->private_data;
struct fuse_write_in inarg;
struct fuse_write_out outarg;
memset(&inarg, 0, sizeof(struct fuse_write_in));
inarg.fh = ff->fh;
inarg.offset = pos;
inarg.size = count;
req->in.h.opcode = FUSE_WRITE;
req->in.h.nodeid = get_node_id(inode);
req->inode = inode;
req->file = file;
req->in.argpages = 1;
req->in.numargs = 2;
req->in.args[0].size = sizeof(struct fuse_write_in);
req->in.args[0].value = &inarg;
req->in.args[1].size = count;
req->out.numargs = 1;
req->out.args[0].size = sizeof(struct fuse_write_out);
req->out.args[0].value = &outarg;
request_send(fc, req);
return outarg.size;
}
static int fuse_unlink(struct _inode *dir, struct dentry *entry)
{
int err;
struct fuse_conn *fc = get_fuse_conn(dir);
struct fuse_req *req = fuse_get_req(fc);
if (IS_ERR(req))
return PTR_ERR(req);
req->in.h.opcode = FUSE_UNLINK;
req->in.h.nodeid = _get_node_id(dir);
req->in.numargs = 1;
req->in.args[0].size = entry->d_name.len + 1;
req->in.args[0].value = entry->d_name.name;
request_send(fc, req);
err = req->out.h.error;
fuse_put_request(fc, req);
if (!err) {
struct _inode *inode = d_get_inode(entry);
/* Set nlink to zero so the inode can be cleared, if
the inode does have more links this will be
discovered at the next lookup/getattr */
clear_nlink(inode);
fuse_invalidate_attr(inode);
fuse_invalidate_attr(dir);
fuse_invalidate_entry_cache(entry);
} else if (err == -EINTR)
fuse_invalidate_entry(entry);
return err;
}
static int fuse_removexattr(struct dentry *entry, const char *name)
{
struct _inode *inode = d_get_inode(entry);
struct fuse_conn *fc = get_fuse_conn(inode);
struct fuse_req *req;
int err;
if (fc->no_removexattr)
return -EOPNOTSUPP;
req = fuse_get_req(fc);
if (IS_ERR(req))
return PTR_ERR(req);
req->in.h.opcode = FUSE_REMOVEXATTR;
req->in.h.nodeid = _get_node_id(inode);
req->in.numargs = 1;
req->in.args[0].size = strlen(name) + 1;
req->in.args[0].value = name;
request_send(fc, req);
err = req->out.h.error;
fuse_put_request(fc, req);
if (err == -ENOSYS) {
fc->no_removexattr = 1;
err = -EOPNOTSUPP;
}
return err;
}
int fuse_do_getattr(struct _inode *inode)
{
int err;
struct fuse_attr_out arg;
struct fuse_conn *fc = get_fuse_conn(inode);
struct fuse_req *req = fuse_get_req(fc);
if (IS_ERR(req))
return PTR_ERR(req);
req->in.h.opcode = FUSE_GETATTR;
req->in.h.nodeid = _get_node_id(inode);
req->out.numargs = 1;
req->out.args[0].size = sizeof(arg);
req->out.args[0].value = &arg;
request_send(fc, req);
err = req->out.h.error;
fuse_put_request(fc, req);
if (!err) {
if ((inode->i_mode ^ arg.attr.mode) & S_IFMT) {
make_bad_inode(inode);
err = -EIO;
} else {
struct fuse_inode *fi = get_fuse_inode(parent(inode));
fuse_change_attributes(inode, &arg.attr);
fi->i_time = time_to_jiffies(arg.attr_valid,
arg.attr_valid_nsec);
}
}
return err;
}
static int fuse_send_open(struct inode *inode, struct file *file, int isdir,
struct fuse_open_out *outargp)
{
struct fuse_conn *fc = get_fuse_conn(inode);
struct fuse_open_in inarg;
struct fuse_req *req;
int err;
req = fuse_get_request(fc);
if (!req)
return -EINTR;
memset(&inarg, 0, sizeof(inarg));
inarg.flags = file->f_flags & ~(O_CREAT | O_EXCL | O_NOCTTY | O_TRUNC);
req->in.h.opcode = isdir ? FUSE_OPENDIR : FUSE_OPEN;
req->in.h.nodeid = get_node_id(inode);
req->inode = inode;
req->in.numargs = 1;
req->in.args[0].size = sizeof(inarg);
req->in.args[0].value = &inarg;
req->out.numargs = 1;
req->out.args[0].size = sizeof(*outargp);
req->out.args[0].value = outargp;
request_send(fc, req);
err = req->out.h.error;
fuse_put_request(fc, req);
return err;
}
static int fuse_access(struct _inode *inode, int mask)
{
struct fuse_conn *fc = get_fuse_conn(inode);
struct fuse_req *req;
struct fuse_access_in inarg;
int err;
if (fc->no_access)
return 0;
req = fuse_get_req(fc);
if (IS_ERR(req))
return PTR_ERR(req);
memset(&inarg, 0, sizeof(inarg));
inarg.mask = mask;
req->in.h.opcode = FUSE_ACCESS;
req->in.h.nodeid = _get_node_id(inode);
req->in.numargs = 1;
req->in.args[0].size = sizeof(inarg);
req->in.args[0].value = &inarg;
request_send(fc, req);
err = req->out.h.error;
fuse_put_request(fc, req);
if (err == -ENOSYS) {
fc->no_access = 1;
err = 0;
}
return err;
}
static int fuse_statfs(struct super_block *sb, struct kstatfs *buf)
{
struct fuse_conn *fc = get_fuse_conn_super(sb);
struct fuse_req *req;
struct fuse_statfs_out outarg;
int err;
req = fuse_get_request(fc);
if (!req)
return -EINTR;
memset(&outarg, 0, sizeof(outarg));
req->in.numargs = 0;
req->in.h.opcode = FUSE_STATFS;
req->out.numargs = 1;
req->out.args[0].size =
fc->minor < 4 ? FUSE_COMPAT_STATFS_SIZE : sizeof(outarg);
req->out.args[0].value = &outarg;
request_send(fc, req);
err = req->out.h.error;
if (!err)
convert_fuse_statfs(buf, &outarg.st);
fuse_put_request(fc, req);
return err;
}
void mwServiceStorage_save(struct mwServiceStorage *srvc,
struct mwStorageUnit *item,
mwStorageCallback cb,
gpointer data, GDestroyNotify d_free) {
/* - construct a request
- put request at end of pending
- if channel is open and connected
- compose the save message
- send message
- set request to sent
- else
- start service
*/
struct mwStorageReq *req;
req = request_new(srvc, item, cb, data, d_free);
req->action = action_save;
srvc->pending = g_list_append(srvc->pending, req);
if(MW_SERVICE_IS_STARTED(MW_SERVICE(srvc)))
request_send(srvc->channel, req);
}
static void recv_channelAccept(struct mwService *srvc,
struct mwChannel *chan,
struct mwMsgChannelAccept *msg) {
// `msg` unused
(void)msg;
struct mwServiceStorage *srvc_stor;
GList *l;
g_return_if_fail(srvc != NULL);
srvc_stor = (struct mwServiceStorage *) srvc;
g_return_if_fail(chan != NULL);
g_return_if_fail(chan == srvc_stor->channel);
/* send all pending requests */
for(l = srvc_stor->pending; l; l = l->next) {
struct mwStorageReq *req = l->data;
if(req->action == action_save || req->action == action_load) {
request_send(chan, req);
}
}
mwService_started(srvc);
}
/*
* Set attributes, and at the same time refresh them.
*
* Truncation is slightly complicated, because the 'truncate' request
* may fail, in which case we don't want to touch the mapping.
* vmtruncate() doesn't allow for this case, so do the rlimit checking
* and the actual truncation by hand.
*/
static int fuse_setattr(struct dentry *entry, struct iattr *attr)
{
struct inode *inode = entry->d_inode;
struct fuse_conn *fc = get_fuse_conn(inode);
struct fuse_inode *fi = get_fuse_inode(inode);
struct fuse_req *req;
struct fuse_setattr_in inarg;
struct fuse_attr_out outarg;
int err;
int is_truncate = 0;
if (fc->flags & FUSE_DEFAULT_PERMISSIONS) {
err = inode_change_ok(inode, attr);
if (err)
return err;
}
if (attr->ia_valid & ATTR_SIZE) {
unsigned long limit;
is_truncate = 1;
limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
if (limit != RLIM_INFINITY && attr->ia_size > (loff_t) limit) {
send_sig(SIGXFSZ, current, 0);
return -EFBIG;
}
}
req = fuse_get_req(fc);
if (IS_ERR(req))
return PTR_ERR(req);
memset(&inarg, 0, sizeof(inarg));
iattr_to_fattr(attr, &inarg);
req->in.h.opcode = FUSE_SETATTR;
req->in.h.nodeid = get_node_id(inode);
req->in.numargs = 1;
req->in.args[0].size = sizeof(inarg);
req->in.args[0].value = &inarg;
req->out.numargs = 1;
req->out.args[0].size = sizeof(outarg);
req->out.args[0].value = &outarg;
request_send(fc, req);
err = req->out.h.error;
fuse_put_request(fc, req);
if (!err) {
if ((inode->i_mode ^ outarg.attr.mode) & S_IFMT) {
make_bad_inode(inode);
err = -EIO;
} else {
if (is_truncate)
fuse_vmtruncate(inode, outarg.attr.size);
fuse_change_attributes(inode, &outarg.attr);
fi->i_time = time_to_jiffies(outarg.attr_valid,
outarg.attr_valid_nsec);
}
} else if (err == -EINTR)
fuse_invalidate_attr(inode);
return err;
}
static int fuse_statfs(struct dentry *dentry, struct kstatfs *buf)
{
struct super_block *sb = dentry->d_sb;
struct fuse_conn *fc = get_fuse_conn_super(sb);
struct fuse_req *req;
struct fuse_statfs_out outarg;
int err;
if (!fuse_allow_task(fc, current)) {
buf->f_type = FUSE_SUPER_MAGIC;
return 0;
}
req = fuse_get_req(fc);
if (IS_ERR(req))
return PTR_ERR(req);
memset(&outarg, 0, sizeof(outarg));
req->in.numargs = 0;
req->in.h.opcode = FUSE_STATFS;
req->in.h.nodeid = get_node_id(dentry->d_inode);
req->out.numargs = 1;
req->out.args[0].size =
fc->minor < 4 ? FUSE_COMPAT_STATFS_SIZE : sizeof(outarg);
req->out.args[0].value = &outarg;
request_send(fc, req);
err = req->out.h.error;
if (!err)
convert_fuse_statfs(buf, &outarg.st);
fuse_put_request(fc, req);
return err;
}
static int fuse_rmdir(struct inode *dir, struct dentry *entry)
{
int err;
struct fuse_conn *fc = get_fuse_conn(dir);
struct fuse_req *req = fuse_get_request(fc);
if (!req)
return -EINTR;
req->in.h.opcode = FUSE_RMDIR;
req->in.h.nodeid = get_node_id(dir);
req->inode = dir;
req->in.numargs = 1;
req->in.args[0].size = entry->d_name.len + 1;
req->in.args[0].value = entry->d_name.name;
request_send(fc, req);
err = req->out.h.error;
fuse_put_request(fc, req);
if (!err) {
entry->d_inode->i_nlink = 0;
fuse_invalidate_attr(dir);
fuse_invalidate_entry_cache(entry);
} else if (err == -EINTR)
fuse_invalidate_entry(entry);
return err;
}
static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry,
struct nameidata *nd)
{
int err;
struct fuse_entry_out outarg;
struct inode *inode = NULL;
#if !defined(FUSE_MAINLINE) && defined(KERNEL_2_6)
struct dentry *newent;
#endif
struct fuse_conn *fc = get_fuse_conn(dir);
struct fuse_req *req;
if (entry->d_name.len > FUSE_NAME_MAX)
return ERR_PTR(-ENAMETOOLONG);
req = fuse_get_request(fc);
if (!req)
return ERR_PTR(-EINTR);
fuse_lookup_init(req, dir, entry, &outarg);
request_send(fc, req);
err = req->out.h.error;
/* Zero nodeid is same as -ENOENT, but with valid timeout */
if (!err && outarg.nodeid &&
(invalid_nodeid(outarg.nodeid) || !valid_mode(outarg.attr.mode)))
err = -EIO;
if (!err && outarg.nodeid) {
inode = fuse_iget(dir->i_sb, outarg.nodeid, outarg.generation,
&outarg.attr);
if (!inode) {
fuse_send_forget(fc, req, outarg.nodeid, 1);
return ERR_PTR(-ENOMEM);
}
}
fuse_put_request(fc, req);
if (err && err != -ENOENT)
return ERR_PTR(err);
if (inode && dir_alias(inode)) {
iput(inode);
return ERR_PTR(-EIO);
}
#if defined(FUSE_MAINLINE) || !defined(KERNEL_2_6)
d_add(entry, inode);
#else
newent = d_splice_alias(inode, entry);
entry = newent ? newent : entry;
#endif
entry->d_op = &fuse_dentry_operations;
if (!err)
fuse_change_timeout(entry, &outarg);
else
fuse_invalidate_entry_cache(entry);
#if defined(FUSE_MAINLINE) || !defined(KERNEL_2_6)
return NULL;
#else
return newent;
#endif
}
/*
* Check whether the dentry is still valid
*
* If the entry validity timeout has expired and the dentry is
* positive, try to redo the lookup. If the lookup results in a
* different inode, then let the VFS invalidate the dentry and redo
* the lookup once more. If the lookup results in the same inode,
* then refresh the attributes, timeouts and mark the dentry valid.
*/
static int fuse_dentry_revalidate(struct dentry *entry, struct nameidata *nd)
{
struct _inode *inode = d_get_inode(entry);
if (inode && is_bad_inode(inode))
return 0;
else if (fuse_dentry_time(entry) < get_jiffies_64()) {
int err;
struct fuse_entry_out outarg;
struct fuse_conn *fc;
struct fuse_req *req;
struct fuse_req *forget_req;
struct dentry *parent;
/* For negative dentries, always do a fresh lookup */
if (!inode)
return 0;
fc = get_fuse_conn(inode);
req = fuse_get_req(fc);
if (IS_ERR(req))
return 0;
forget_req = fuse_get_req(fc);
if (IS_ERR(forget_req)) {
fuse_put_request(fc, req);
return 0;
}
parent = dget_parent(entry);
fuse_lookup_init(req, d_get_inode(parent), entry, &outarg);
request_send(fc, req);
dput(parent);
err = req->out.h.error;
fuse_put_request(fc, req);
/* Zero nodeid is same as -ENOENT */
if (!err && !outarg.nodeid)
err = -ENOENT;
if (!err) {
struct fuse_inode *fi = _get_fuse_inode(inode);
if (outarg.nodeid != _get_node_id(inode)) {
fuse_send_forget(fc, forget_req,
outarg.nodeid, 1);
return 0;
}
spin_lock(&fc->lock);
fi->nlookup ++;
spin_unlock(&fc->lock);
}
fuse_put_request(fc, forget_req);
if (err || (outarg.attr.mode ^ inode->i_mode) & S_IFMT)
return 0;
fuse_change_attributes(inode, &outarg.attr);
fuse_change_timeout(entry, &outarg);
}
return 1;
}
static size_t fuse_send_read(struct fuse_req *req, struct file *file,
struct inode *inode, loff_t pos, size_t count)
{
struct fuse_conn *fc = get_fuse_conn(inode);
fuse_read_fill(req, file, inode, pos, count, FUSE_READ);
request_send(fc, req);
return req->out.args[0].size;
}
int fuse_lookup_name(struct super_block *sb, u64 nodeid, struct qstr *name,
struct fuse_entry_out *outarg, struct inode **inode)
{
struct fuse_conn *fc = get_fuse_conn_super(sb);
struct fuse_req *req;
struct fuse_req *forget_req;
u64 attr_version;
int err;
*inode = NULL;
err = -ENAMETOOLONG;
if (name->len > FUSE_NAME_MAX)
goto out;
req = fuse_get_req(fc);
err = PTR_ERR(req);
if (IS_ERR(req))
goto out;
forget_req = fuse_get_req(fc);
err = PTR_ERR(forget_req);
if (IS_ERR(forget_req)) {
fuse_put_request(fc, req);
goto out;
}
attr_version = fuse_get_attr_version(fc);
fuse_lookup_init(fc, req, nodeid, name, outarg);
request_send(fc, req);
err = req->out.h.error;
fuse_put_request(fc, req);
/* Zero nodeid is same as -ENOENT, but with valid timeout */
if (err || !outarg->nodeid)
goto out_put_forget;
err = -EIO;
if (!outarg->nodeid)
goto out_put_forget;
if (!fuse_valid_type(outarg->attr.mode))
goto out_put_forget;
*inode = fuse_iget(sb, outarg->nodeid, outarg->generation,
&outarg->attr, entry_attr_timeout(outarg),
attr_version);
err = -ENOMEM;
if (!*inode) {
fuse_send_forget(fc, forget_req, outarg->nodeid, 1);
goto out;
}
err = 0;
out_put_forget:
fuse_put_request(fc, forget_req);
out:
return err;
}
/*
* Synchronous release for the case when something goes wrong in CREATE_OPEN
*/
static void fuse_sync_release(struct fuse_conn *fc, struct fuse_file *ff,
u64 nodeid, int flags)
{
fuse_release_fill(ff, nodeid, flags, FUSE_RELEASE);
ff->reserved_req->force = 1;
request_send(fc, ff->reserved_req);
fuse_put_request(fc, ff->reserved_req);
kfree(ff);
}
/*
* Check whether the dentry is still valid
*
* If the entry validity timeout has expired and the dentry is
* positive, try to redo the lookup. If the lookup results in a
* different inode, then let the VFS invalidate the dentry and redo
* the lookup once more. If the lookup results in the same inode,
* then refresh the attributes, timeouts and mark the dentry valid.
*/
static int fuse_dentry_revalidate(struct dentry *entry, struct nameidata *nd)
{
struct inode *inode = entry->d_inode;
if (inode && is_bad_inode(inode))
return 0;
else if (fuse_dentry_time(entry) < get_jiffies_64()) {
int err;
struct fuse_entry_out outarg;
struct fuse_conn *fc;
struct fuse_req *req;
struct fuse_req *forget_req;
/* Doesn't hurt to "reset" the validity timeout */
fuse_invalidate_entry_cache(entry);
/* For negative dentries, always do a fresh lookup */
if (!inode)
return 0;
fc = get_fuse_conn(inode);
req = fuse_get_req(fc);
if (IS_ERR(req))
return 0;
forget_req = fuse_get_req(fc);
if (IS_ERR(forget_req)) {
fuse_put_request(fc, req);
return 0;
}
fuse_lookup_init(req, entry->d_parent->d_inode, entry, &outarg);
request_send(fc, req);
err = req->out.h.error;
fuse_put_request(fc, req);
/* Zero nodeid is same as -ENOENT */
if (!err && !outarg.nodeid)
err = -ENOENT;
if (!err) {
struct fuse_inode *fi = get_fuse_inode(inode);
if (outarg.nodeid != get_node_id(inode)) {
fuse_send_forget(fc, forget_req,
outarg.nodeid, 1);
return 0;
}
fi->nlookup ++;
}
fuse_put_request(fc, forget_req);
if (err || (outarg.attr.mode ^ inode->i_mode) & S_IFMT)
return 0;
fuse_change_attributes(inode, &outarg.attr);
fuse_change_timeout(entry, &outarg);
}
return 1;
}
/*
* Synchronous release for the case when something goes wrong in CREATE_OPEN
*/
static void fuse_sync_release(struct fuse_conn *fc, struct fuse_file *ff,
u64 nodeid, int flags)
{
struct fuse_req *req;
req = fuse_release_fill(ff, nodeid, flags, FUSE_RELEASE);
req->force = 1;
request_send(fc, req);
fuse_put_request(fc, req);
}
static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry,
struct nameidata *nd)
{
int err;
struct fuse_entry_out outarg;
struct inode *inode = NULL;
struct fuse_conn *fc = get_fuse_conn(dir);
struct fuse_req *req;
struct fuse_req *forget_req;
if (entry->d_name.len > FUSE_NAME_MAX)
return ERR_PTR(-ENAMETOOLONG);
req = fuse_get_req(fc);
if (IS_ERR(req))
return ERR_PTR(PTR_ERR(req));
forget_req = fuse_get_req(fc);
if (IS_ERR(forget_req)) {
fuse_put_request(fc, req);
return ERR_PTR(PTR_ERR(forget_req));
}
fuse_lookup_init(req, dir, entry, &outarg);
request_send(fc, req);
err = req->out.h.error;
fuse_put_request(fc, req);
/* Zero nodeid is same as -ENOENT, but with valid timeout */
if (!err && outarg.nodeid &&
(invalid_nodeid(outarg.nodeid) || !valid_mode(outarg.attr.mode)))
err = -EIO;
if (!err && outarg.nodeid) {
inode = fuse_iget(dir->i_sb, outarg.nodeid, outarg.generation,
&outarg.attr);
if (!inode) {
fuse_send_forget(fc, forget_req, outarg.nodeid, 1);
return ERR_PTR(-ENOMEM);
}
}
fuse_put_request(fc, forget_req);
if (err && err != -ENOENT)
return ERR_PTR(err);
if (inode && dir_alias(inode)) {
iput(inode);
return ERR_PTR(-EIO);
}
d_add(entry, inode);
entry->d_op = &fuse_dentry_operations;
if (!err)
fuse_change_timeout(entry, &outarg);
else
fuse_invalidate_entry_cache(entry);
return NULL;
}
static void fuse_send_destroy(struct fuse_conn *fc)
{
struct fuse_req *req = fc->destroy_req;
if (req && fc->conn_init) {
fc->destroy_req = NULL;
req->in.h.opcode = FUSE_DESTROY;
req->force = 1;
request_send(fc, req);
fuse_put_request(fc, req);
}
}
/*
* Code shared between mknod, mkdir, symlink and link
*/
static int create_new_entry(struct fuse_conn *fc, struct fuse_req *req,
struct inode *dir, struct dentry *entry,
int mode)
{
struct fuse_entry_out outarg;
struct inode *inode;
int err;
struct fuse_req *forget_req;
forget_req = fuse_get_req(fc);
if (IS_ERR(forget_req)) {
fuse_put_request(fc, req);
return PTR_ERR(forget_req);
}
req->in.h.nodeid = get_node_id(dir);
req->out.numargs = 1;
req->out.args[0].size = sizeof(outarg);
req->out.args[0].value = &outarg;
request_send(fc, req);
err = req->out.h.error;
fuse_put_request(fc, req);
if (err)
goto out_put_forget_req;
err = -EIO;
if (invalid_nodeid(outarg.nodeid))
goto out_put_forget_req;
if ((outarg.attr.mode ^ mode) & S_IFMT)
goto out_put_forget_req;
inode = fuse_iget(dir->i_sb, outarg.nodeid, outarg.generation,
&outarg.attr);
if (!inode) {
fuse_send_forget(fc, forget_req, outarg.nodeid, 1);
return -ENOMEM;
}
fuse_put_request(fc, forget_req);
if (dir_alias(inode)) {
iput(inode);
return -EIO;
}
d_instantiate(entry, inode);
fuse_change_timeout(entry, &outarg);
fuse_invalidate_attr(dir);
return 0;
out_put_forget_req:
fuse_put_request(fc, forget_req);
return err;
}
static int fuse_do_getattr(struct inode *inode, struct kstat *stat,
struct file *file)
{
int err;
struct fuse_getattr_in inarg;
struct fuse_attr_out outarg;
struct fuse_conn *fc = get_fuse_conn(inode);
struct fuse_req *req;
u64 attr_version;
req = fuse_get_req(fc);
if (IS_ERR(req))
return PTR_ERR(req);
attr_version = fuse_get_attr_version(fc);
memset(&inarg, 0, sizeof(inarg));
memset(&outarg, 0, sizeof(outarg));
/* Directories have separate file-handle space */
if (file && S_ISREG(inode->i_mode)) {
struct fuse_file *ff = file->private_data;
inarg.getattr_flags |= FUSE_GETATTR_FH;
inarg.fh = ff->fh;
}
req->in.h.opcode = FUSE_GETATTR;
req->in.h.nodeid = get_node_id(inode);
req->in.numargs = 1;
req->in.args[0].size = sizeof(inarg);
req->in.args[0].value = &inarg;
req->out.numargs = 1;
if (fc->minor < 9)
req->out.args[0].size = FUSE_COMPAT_ATTR_OUT_SIZE;
else
req->out.args[0].size = sizeof(outarg);
req->out.args[0].value = &outarg;
request_send(fc, req);
err = req->out.h.error;
fuse_put_request(fc, req);
if (!err) {
if ((inode->i_mode ^ outarg.attr.mode) & S_IFMT) {
make_bad_inode(inode);
err = -EIO;
} else {
fuse_change_attributes(inode, &outarg.attr,
attr_timeout(&outarg),
attr_version);
if (stat)
fuse_fillattr(inode, &outarg.attr, stat);
}
}
return err;
}
static ssize_t fuse_getxattr(struct dentry *entry, const char *name,
void *value, size_t size)
{
struct inode *inode = entry->d_inode;
struct fuse_conn *fc = get_fuse_conn(inode);
struct fuse_req *req;
struct fuse_getxattr_in inarg;
struct fuse_getxattr_out outarg;
ssize_t ret;
if (fc->no_getxattr)
return -EOPNOTSUPP;
req = fuse_get_request(fc);
if (!req)
return -EINTR;
memset(&inarg, 0, sizeof(inarg));
inarg.size = size;
req->in.h.opcode = FUSE_GETXATTR;
req->in.h.nodeid = get_node_id(inode);
req->inode = inode;
req->in.numargs = 2;
req->in.args[0].size = sizeof(inarg);
req->in.args[0].value = &inarg;
req->in.args[1].size = strlen(name) + 1;
req->in.args[1].value = name;
/* This is really two different operations rolled into one */
req->out.numargs = 1;
if (size) {
req->out.argvar = 1;
req->out.args[0].size = size;
req->out.args[0].value = value;
} else {
req->out.args[0].size = sizeof(outarg);
req->out.args[0].value = &outarg;
}
request_send(fc, req);
ret = req->out.h.error;
if (!ret)
ret = size ? req->out.args[0].size : outarg.size;
else {
if (ret == -ENOSYS) {
fc->no_getxattr = 1;
ret = -EOPNOTSUPP;
}
}
fuse_put_request(fc, req);
return ret;
}
static ssize_t fuse_listxattr(struct dentry *entry, char *list, size_t size)
{
struct inode *inode = entry->d_inode;
struct fuse_conn *fc = get_fuse_conn(inode);
struct fuse_req *req;
struct fuse_getxattr_in inarg;
struct fuse_getxattr_out outarg;
ssize_t ret;
if (!fuse_allow_task(fc, current))
return -EACCES;
if (fc->no_listxattr)
return -EOPNOTSUPP;
req = fuse_get_req(fc);
if (IS_ERR(req))
return PTR_ERR(req);
memset(&inarg, 0, sizeof(inarg));
inarg.size = size;
req->in.h.opcode = FUSE_LISTXATTR;
req->in.h.nodeid = get_node_id(inode);
req->in.numargs = 1;
req->in.args[0].size = sizeof(inarg);
req->in.args[0].value = &inarg;
/* This is really two different operations rolled into one */
req->out.numargs = 1;
if (size) {
req->out.argvar = 1;
req->out.args[0].size = size;
req->out.args[0].value = list;
} else {
req->out.args[0].size = sizeof(outarg);
req->out.args[0].value = &outarg;
}
request_send(fc, req);
ret = req->out.h.error;
if (!ret)
ret = size ? req->out.args[0].size : outarg.size;
else {
if (ret == -ENOSYS) {
fc->no_listxattr = 1;
ret = -EOPNOTSUPP;
}
}
fuse_put_request(fc, req);
return ret;
}
static int fuse_rename(struct inode *olddir, struct dentry *oldent,
struct inode *newdir, struct dentry *newent)
{
int err;
struct fuse_rename_in inarg;
struct fuse_conn *fc = get_fuse_conn(olddir);
struct fuse_req *req = fuse_get_req(fc);
if (IS_ERR(req))
return PTR_ERR(req);
memset(&inarg, 0, sizeof(inarg));
inarg.newdir = get_node_id(newdir);
req->in.h.opcode = FUSE_RENAME;
req->in.h.nodeid = get_node_id(olddir);
req->in.numargs = 3;
req->in.args[0].size = sizeof(inarg);
req->in.args[0].value = &inarg;
req->in.args[1].size = oldent->d_name.len + 1;
req->in.args[1].value = oldent->d_name.name;
req->in.args[2].size = newent->d_name.len + 1;
req->in.args[2].value = newent->d_name.name;
request_send(fc, req);
err = req->out.h.error;
fuse_put_request(fc, req);
if (!err) {
/* ctime changes */
fuse_invalidate_attr(oldent->d_inode);
fuse_invalidate_attr(olddir);
if (olddir != newdir)
fuse_invalidate_attr(newdir);
/* newent will end up negative */
if (newent->d_inode)
fuse_invalidate_entry_cache(newent);
} else if (err == -EINTR) {
/* If request was interrupted, DEITY only knows if the
rename actually took place. If the invalidation
fails (e.g. some process has CWD under the renamed
directory), then there can be inconsistency between
the dcache and the real filesystem. Tough luck. */
fuse_invalidate_entry(oldent);
if (newent->d_inode)
fuse_invalidate_entry(newent);
}
return err;
}
static void fuse_send_readpages(struct fuse_req *req, struct file *file,
struct inode *inode)
{
struct fuse_conn *fc = get_fuse_conn(inode);
loff_t pos = page_offset(req->pages[0]);
size_t count = req->num_pages << PAGE_CACHE_SHIFT;
req->out.page_zeroing = 1;
fuse_read_fill(req, file, inode, pos, count, FUSE_READ);
if (fc->async_read) {
req->end = fuse_readpages_end;
request_send_background(fc, req);
} else {
request_send(fc, req);
fuse_readpages_end(fc, req);
}
}
Response *httpclient_send_request(HttpClient *httpClient){
Request *request = httpClient->request;
if(request == NULL){
printf("request must not be null\n");
return NULL;
}
if(request->curl_handle == NULL){
printf("curl_handle must not be null\n");
return NULL;
}
request_send(request, httpClient);
return httpClient->response;
}
