static int fuse_atomic_open(struct inode *dir, struct dentry *entry,
struct file *file, unsigned flags,
umode_t mode, int *opened)
{
int err;
struct fuse_conn *fc = get_fuse_conn(dir);
struct dentry *res = NULL;
if (d_unhashed(entry)) {
res = fuse_lookup(dir, entry, 0);
if (IS_ERR(res))
return PTR_ERR(res);
if (res)
entry = res;
}
if (!(flags & O_CREAT) || entry->d_inode)
goto no_open;
/* Only creates */
*opened |= FILE_CREATED;
if (fc->no_create)
goto mknod;
err = fuse_create_open(dir, entry, file, flags, mode, opened);
if (err == -ENOSYS) {
fc->no_create = 1;
goto mknod;
}
out_dput:
dput(res);
return err;
mknod:
err = fuse_mknod(dir, entry, mode, 0);
if (err)
goto out_dput;
no_open:
return finish_no_open(file, res);
}
/*
* 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 by hand and call vmtruncate() only after the file has
* actually been truncated.
*/
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;
#ifdef KERNEL_2_6_10_PLUS
limit = current->signal->rlim[RLIMIT_FSIZE].rlim_cur;
#else
limit = current->rlim[RLIMIT_FSIZE].rlim_cur;
#endif
if (limit != RLIM_INFINITY && attr->ia_size > (loff_t) limit) {
send_sig(SIGXFSZ, current, 0);
return -EFBIG;
}
}
req = fuse_get_request(fc);
if (!req)
return -EINTR;
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->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(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) {
#ifndef KERNEL_2_6_12_PLUS
if (get_node_id(inode) != FUSE_ROOT_ID)
make_bad_inode(inode);
#else
make_bad_inode(inode);
#endif
err = -EIO;
} else {
if (is_truncate) {
loff_t origsize = i_size_read(inode);
i_size_write(inode, outarg.attr.size);
if (origsize > outarg.attr.size)
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;
}
#ifdef KERNEL_2_6
static int fuse_getattr(struct vfsmount *mnt, struct dentry *entry,
struct kstat *stat)
{
struct inode *inode = entry->d_inode;
int err = fuse_revalidate(entry);
if (!err)
generic_fillattr(inode, stat);
return err;
}
#else /* KERNEL_2_6 */
static struct dentry *fuse_lookup_2_4(struct inode *dir, struct dentry *entry)
{
return fuse_lookup(dir, entry, NULL);
}