diff options
Diffstat (limited to 'fs/ncpfs/file.c')
-rw-r--r-- | fs/ncpfs/file.c | 263 |
1 files changed, 0 insertions, 263 deletions
diff --git a/fs/ncpfs/file.c b/fs/ncpfs/file.c deleted file mode 100644 index 8f8cc0334ddd..000000000000 --- a/fs/ncpfs/file.c +++ /dev/null @@ -1,263 +0,0 @@ -// SPDX-License-Identifier: GPL-2.0 -/* - * file.c - * - * Copyright (C) 1995, 1996 by Volker Lendecke - * Modified 1997 Peter Waltenberg, Bill Hawes, David Woodhouse for 2.1 dcache - * - */ - -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include <linux/uaccess.h> - -#include <linux/time.h> -#include <linux/kernel.h> -#include <linux/errno.h> -#include <linux/fcntl.h> -#include <linux/stat.h> -#include <linux/mm.h> -#include <linux/vmalloc.h> -#include <linux/sched.h> - -#include "ncp_fs.h" - -static int ncp_fsync(struct file *file, loff_t start, loff_t end, int datasync) -{ - return file_write_and_wait_range(file, start, end); -} - -/* - * Open a file with the specified read/write mode. - */ -int ncp_make_open(struct inode *inode, int right) -{ - int error; - int access; - - error = -EINVAL; - if (!inode) { - pr_err("%s: got NULL inode\n", __func__); - goto out; - } - - ncp_dbg(1, "opened=%d, volume # %u, dir entry # %u\n", - atomic_read(&NCP_FINFO(inode)->opened), - NCP_FINFO(inode)->volNumber, - NCP_FINFO(inode)->dirEntNum); - error = -EACCES; - mutex_lock(&NCP_FINFO(inode)->open_mutex); - if (!atomic_read(&NCP_FINFO(inode)->opened)) { - struct ncp_entry_info finfo; - int result; - - /* tries max. rights */ - finfo.access = O_RDWR; - result = ncp_open_create_file_or_subdir(NCP_SERVER(inode), - inode, NULL, OC_MODE_OPEN, - 0, AR_READ | AR_WRITE, &finfo); - if (!result) - goto update; - /* RDWR did not succeeded, try readonly or writeonly as requested */ - switch (right) { - case O_RDONLY: - finfo.access = O_RDONLY; - result = ncp_open_create_file_or_subdir(NCP_SERVER(inode), - inode, NULL, OC_MODE_OPEN, - 0, AR_READ, &finfo); - break; - case O_WRONLY: - finfo.access = O_WRONLY; - result = ncp_open_create_file_or_subdir(NCP_SERVER(inode), - inode, NULL, OC_MODE_OPEN, - 0, AR_WRITE, &finfo); - break; - } - if (result) { - ncp_vdbg("failed, result=%d\n", result); - goto out_unlock; - } - /* - * Update the inode information. - */ - update: - ncp_update_inode(inode, &finfo); - atomic_set(&NCP_FINFO(inode)->opened, 1); - } - - access = NCP_FINFO(inode)->access; - ncp_vdbg("file open, access=%x\n", access); - if (access == right || access == O_RDWR) { - atomic_inc(&NCP_FINFO(inode)->opened); - error = 0; - } - -out_unlock: - mutex_unlock(&NCP_FINFO(inode)->open_mutex); -out: - return 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_write_iter(struct kiocb *iocb, struct iov_iter *from) -{ - struct file *file = iocb->ki_filp; - struct inode *inode = file_inode(file); - size_t already_written = 0; - size_t bufsize; - int errno; - void *bouncebuffer; - off_t pos; - - ncp_dbg(1, "enter %pD2\n", file); - errno = generic_write_checks(iocb, from); - if (errno <= 0) - return errno; - - errno = ncp_make_open(inode, O_WRONLY); - if (errno) { - ncp_dbg(1, "open failed, error=%d\n", errno); - return errno; - } - bufsize = NCP_SERVER(inode)->buffer_size; - - errno = file_update_time(file); - if (errno) - goto outrel; - - bouncebuffer = vmalloc(bufsize); - if (!bouncebuffer) { - errno = -EIO; /* -ENOMEM */ - goto outrel; - } - pos = iocb->ki_pos; - while (iov_iter_count(from)) { - int written_this_time; - size_t to_write = min_t(size_t, - bufsize - (pos % bufsize), - iov_iter_count(from)); - - if (!copy_from_iter_full(bouncebuffer, to_write, from)) { - errno = -EFAULT; - break; - } - if (ncp_write_kernel(NCP_SERVER(inode), - NCP_FINFO(inode)->file_handle, - pos, to_write, bouncebuffer, &written_this_time) != 0) { - errno = -EIO; - break; - } - pos += written_this_time; - already_written += written_this_time; - - if (written_this_time != to_write) - break; - } - vfree(bouncebuffer); - - iocb->ki_pos = pos; - - if (pos > i_size_read(inode)) { - inode_lock(inode); - if (pos > i_size_read(inode)) - i_size_write(inode, pos); - inode_unlock(inode); - } - ncp_dbg(1, "exit %pD2\n", file); -outrel: - ncp_inode_close(inode); - return already_written ? already_written : errno; -} - -static int ncp_release(struct inode *inode, struct file *file) { - if (ncp_make_closed(inode)) { - ncp_dbg(1, "failed to close\n"); - } - return 0; -} - -const struct file_operations ncp_file_operations = -{ - .llseek = generic_file_llseek, - .read_iter = ncp_file_read_iter, - .write_iter = ncp_file_write_iter, - .unlocked_ioctl = ncp_ioctl, -#ifdef CONFIG_COMPAT - .compat_ioctl = ncp_compat_ioctl, -#endif - .mmap = ncp_mmap, - .release = ncp_release, - .fsync = ncp_fsync, -}; - -const struct inode_operations ncp_file_inode_operations = -{ - .setattr = ncp_notify_change, -}; |