static ssize_t
ncp_file_read(struct file *file, char *buf, size_t count, loff_t *ppos)
{
struct dentry *dentry = file->f_dentry;
struct inode *inode = dentry->d_inode;
size_t already_read = 0;
off_t pos;
size_t bufsize;
int error;
void* freepage;
size_t freelen;
DPRINTK("ncp_file_read: enter %s/%s\n",
dentry->d_parent->d_name.name, dentry->d_name.name);
error = -EIO;
if (!ncp_conn_valid(NCP_SERVER(inode)))
goto out;
error = -EINVAL;
if (!S_ISREG(inode->i_mode)) {
DPRINTK("ncp_file_read: read from non-file, mode %07o\n",
inode->i_mode);
goto out;
}
pos = *ppos;
/* leave it out on server ...
if (pos + count > inode->i_size) {
count = inode->i_size - pos;
}
*/
error = 0;
if (!count) /* size_t is never < 0 */
goto out;
error = ncp_make_open(inode, O_RDONLY);
if (error) {
DPRINTK(KERN_ERR "ncp_file_read: open failed, error=%d\n", error);
goto out;
}
bufsize = NCP_SERVER(inode)->buffer_size;
error = -EIO;
freelen = ncp_read_bounce_size(bufsize);
freepage = vmalloc(freelen);
if (!freepage)
goto outrel;
error = 0;
/* First read in as much as possible for each bufsize. */
while (already_read < count) {
int read_this_time;
size_t to_read = min_t(unsigned int,
bufsize - (pos % bufsize),
count - already_read);
error = ncp_read_bounce(NCP_SERVER(inode),
NCP_FINFO(inode)->file_handle,
pos, to_read, buf, &read_this_time,
freepage, freelen);
if (error) {
error = -EIO; /* NW errno -> Linux errno */
break;
}
pos += read_this_time;
buf += read_this_time;
already_read += read_this_time;
if (read_this_time != to_read) {
break;
}
}
vfree(freepage);
*ppos = pos;
if (!IS_RDONLY(inode)) {
inode->i_atime = CURRENT_TIME;
}
DPRINTK("ncp_file_read: exit %s/%s\n",
dentry->d_parent->d_name.name, dentry->d_name.name);
outrel:
ncp_inode_close(inode);
out:
return already_read ? already_read : error;
}
static ssize_t
ncp_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
{
struct file *file = iocb->ki_filp;
struct inode *inode = file_inode(file);
size_t already_read = 0;
off_t pos = iocb->ki_pos;
size_t bufsize;
int error;
void *freepage;
size_t freelen;
ncp_dbg(1, "enter %pD2\n", file);
if (!iov_iter_count(to))
return 0;
if (pos > inode->i_sb->s_maxbytes)
return 0;
iov_iter_truncate(to, inode->i_sb->s_maxbytes - pos);
error = ncp_make_open(inode, O_RDONLY);
if (error) {
ncp_dbg(1, "open failed, error=%d\n", error);
return error;
}
bufsize = NCP_SERVER(inode)->buffer_size;
error = -EIO;
freelen = ncp_read_bounce_size(bufsize);
freepage = vmalloc(freelen);
if (!freepage)
goto outrel;
error = 0;
/* First read in as much as possible for each bufsize. */
while (iov_iter_count(to)) {
int read_this_time;
size_t to_read = min_t(size_t,
bufsize - (pos % bufsize),
iov_iter_count(to));
error = ncp_read_bounce(NCP_SERVER(inode),
NCP_FINFO(inode)->file_handle,
pos, to_read, to, &read_this_time,
freepage, freelen);
if (error) {
error = -EIO; /* NW errno -> Linux errno */
break;
}
pos += read_this_time;
already_read += read_this_time;
if (read_this_time != to_read)
break;
}
vfree(freepage);
iocb->ki_pos = pos;
file_accessed(file);
ncp_dbg(1, "exit %pD2\n", file);
outrel:
ncp_inode_close(inode);
return already_read ? already_read : error;
}
static ssize_t
ncp_file_read(struct file *file, char __user *buf, size_t count, loff_t *ppos)
{
struct dentry *dentry = file->f_path.dentry;
struct inode *inode = dentry->d_inode;
size_t already_read = 0;
off_t pos;
size_t bufsize;
int error;
void* freepage;
size_t freelen;
DPRINTK("ncp_file_read: enter %s/%s\n",
dentry->d_parent->d_name.name, dentry->d_name.name);
pos = *ppos;
if ((ssize_t) count < 0) {
return -EINVAL;
}
if (!count)
return 0;
if (pos > inode->i_sb->s_maxbytes)
return 0;
if (pos + count > inode->i_sb->s_maxbytes) {
count = inode->i_sb->s_maxbytes - pos;
}
error = ncp_make_open(inode, O_RDONLY);
if (error) {
DPRINTK(KERN_ERR "ncp_file_read: open failed, error=%d\n", error);
return error;
}
bufsize = NCP_SERVER(inode)->buffer_size;
error = -EIO;
freelen = ncp_read_bounce_size(bufsize);
freepage = vmalloc(freelen);
if (!freepage)
goto outrel;
error = 0;
/* First read in as much as possible for each bufsize. */
while (already_read < count) {
int read_this_time;
size_t to_read = min_t(unsigned int,
bufsize - (pos % bufsize),
count - already_read);
error = ncp_read_bounce(NCP_SERVER(inode),
NCP_FINFO(inode)->file_handle,
pos, to_read, buf, &read_this_time,
freepage, freelen);
if (error) {
error = -EIO; /* NW errno -> Linux errno */
break;
}
pos += read_this_time;
buf += read_this_time;
already_read += read_this_time;
if (read_this_time != to_read) {
break;
}
}
vfree(freepage);
*ppos = pos;
file_accessed(file);
DPRINTK("ncp_file_read: exit %s/%s\n",
dentry->d_parent->d_name.name, dentry->d_name.name);
outrel:
ncp_inode_close(inode);
return already_read ? already_read : error;
}
