mirror of https://gitee.com/openkylin/linux.git
998 lines
23 KiB
C
998 lines
23 KiB
C
/*
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* fs/f2fs/file.c
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*
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* Copyright (c) 2012 Samsung Electronics Co., Ltd.
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* http://www.samsung.com/
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/fs.h>
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#include <linux/f2fs_fs.h>
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#include <linux/stat.h>
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#include <linux/buffer_head.h>
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#include <linux/writeback.h>
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#include <linux/blkdev.h>
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#include <linux/falloc.h>
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#include <linux/types.h>
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#include <linux/compat.h>
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#include <linux/uaccess.h>
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#include <linux/mount.h>
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#include <linux/pagevec.h>
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#include "f2fs.h"
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#include "node.h"
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#include "segment.h"
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#include "xattr.h"
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#include "acl.h"
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#include <trace/events/f2fs.h>
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static int f2fs_vm_page_mkwrite(struct vm_area_struct *vma,
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struct vm_fault *vmf)
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{
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struct page *page = vmf->page;
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struct inode *inode = file_inode(vma->vm_file);
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struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
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struct dnode_of_data dn;
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int err;
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f2fs_balance_fs(sbi);
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sb_start_pagefault(inode->i_sb);
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/* force to convert with normal data indices */
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err = f2fs_convert_inline_data(inode, MAX_INLINE_DATA + 1, page);
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if (err)
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goto out;
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/* block allocation */
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f2fs_lock_op(sbi);
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set_new_dnode(&dn, inode, NULL, NULL, 0);
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err = f2fs_reserve_block(&dn, page->index);
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f2fs_unlock_op(sbi);
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if (err)
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goto out;
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file_update_time(vma->vm_file);
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lock_page(page);
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if (unlikely(page->mapping != inode->i_mapping ||
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page_offset(page) > i_size_read(inode) ||
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!PageUptodate(page))) {
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unlock_page(page);
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err = -EFAULT;
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goto out;
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}
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/*
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* check to see if the page is mapped already (no holes)
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*/
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if (PageMappedToDisk(page))
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goto mapped;
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/* page is wholly or partially inside EOF */
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if (((page->index + 1) << PAGE_CACHE_SHIFT) > i_size_read(inode)) {
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unsigned offset;
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offset = i_size_read(inode) & ~PAGE_CACHE_MASK;
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zero_user_segment(page, offset, PAGE_CACHE_SIZE);
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}
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set_page_dirty(page);
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SetPageUptodate(page);
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trace_f2fs_vm_page_mkwrite(page, DATA);
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mapped:
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/* fill the page */
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f2fs_wait_on_page_writeback(page, DATA);
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out:
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sb_end_pagefault(inode->i_sb);
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return block_page_mkwrite_return(err);
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}
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static const struct vm_operations_struct f2fs_file_vm_ops = {
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.fault = filemap_fault,
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.map_pages = filemap_map_pages,
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.page_mkwrite = f2fs_vm_page_mkwrite,
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.remap_pages = generic_file_remap_pages,
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};
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static int get_parent_ino(struct inode *inode, nid_t *pino)
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{
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struct dentry *dentry;
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inode = igrab(inode);
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dentry = d_find_any_alias(inode);
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iput(inode);
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if (!dentry)
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return 0;
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if (update_dent_inode(inode, &dentry->d_name)) {
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dput(dentry);
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return 0;
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}
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*pino = parent_ino(dentry);
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dput(dentry);
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return 1;
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}
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static inline bool need_do_checkpoint(struct inode *inode)
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{
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struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
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bool need_cp = false;
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if (!S_ISREG(inode->i_mode) || inode->i_nlink != 1)
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need_cp = true;
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else if (file_wrong_pino(inode))
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need_cp = true;
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else if (!space_for_roll_forward(sbi))
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need_cp = true;
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else if (!is_checkpointed_node(sbi, F2FS_I(inode)->i_pino))
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need_cp = true;
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else if (F2FS_I(inode)->xattr_ver == cur_cp_version(F2FS_CKPT(sbi)))
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need_cp = true;
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return need_cp;
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}
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int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
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{
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struct inode *inode = file->f_mapping->host;
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struct f2fs_inode_info *fi = F2FS_I(inode);
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struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
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nid_t ino = inode->i_ino;
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int ret = 0;
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bool need_cp = false;
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struct writeback_control wbc = {
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.sync_mode = WB_SYNC_ALL,
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.nr_to_write = LONG_MAX,
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.for_reclaim = 0,
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};
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if (unlikely(f2fs_readonly(inode->i_sb)))
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return 0;
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trace_f2fs_sync_file_enter(inode);
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/* if fdatasync is triggered, let's do in-place-update */
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if (get_dirty_pages(inode) <= SM_I(sbi)->min_fsync_blocks)
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set_inode_flag(fi, FI_NEED_IPU);
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ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
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clear_inode_flag(fi, FI_NEED_IPU);
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if (ret) {
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trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
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return ret;
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}
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/*
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* if there is no written data, don't waste time to write recovery info.
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*/
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if (!is_inode_flag_set(fi, FI_APPEND_WRITE) &&
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!exist_written_data(sbi, ino, APPEND_INO)) {
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struct page *i = find_get_page(NODE_MAPPING(sbi), ino);
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/* But we need to avoid that there are some inode updates */
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if ((i && PageDirty(i)) || need_inode_block_update(sbi, ino)) {
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f2fs_put_page(i, 0);
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goto go_write;
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}
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f2fs_put_page(i, 0);
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if (is_inode_flag_set(fi, FI_UPDATE_WRITE) ||
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exist_written_data(sbi, ino, UPDATE_INO))
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goto flush_out;
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goto out;
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}
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go_write:
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/* guarantee free sections for fsync */
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f2fs_balance_fs(sbi);
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/*
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* Both of fdatasync() and fsync() are able to be recovered from
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* sudden-power-off.
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*/
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down_read(&fi->i_sem);
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need_cp = need_do_checkpoint(inode);
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up_read(&fi->i_sem);
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if (need_cp) {
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nid_t pino;
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/* all the dirty node pages should be flushed for POR */
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ret = f2fs_sync_fs(inode->i_sb, 1);
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down_write(&fi->i_sem);
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F2FS_I(inode)->xattr_ver = 0;
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if (file_wrong_pino(inode) && inode->i_nlink == 1 &&
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get_parent_ino(inode, &pino)) {
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F2FS_I(inode)->i_pino = pino;
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file_got_pino(inode);
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up_write(&fi->i_sem);
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mark_inode_dirty_sync(inode);
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ret = f2fs_write_inode(inode, NULL);
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if (ret)
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goto out;
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} else {
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up_write(&fi->i_sem);
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}
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} else {
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sync_nodes:
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sync_node_pages(sbi, ino, &wbc);
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if (need_inode_block_update(sbi, ino)) {
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mark_inode_dirty_sync(inode);
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ret = f2fs_write_inode(inode, NULL);
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if (ret)
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goto out;
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goto sync_nodes;
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}
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ret = wait_on_node_pages_writeback(sbi, ino);
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if (ret)
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goto out;
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/* once recovery info is written, don't need to tack this */
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remove_dirty_inode(sbi, ino, APPEND_INO);
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clear_inode_flag(fi, FI_APPEND_WRITE);
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flush_out:
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remove_dirty_inode(sbi, ino, UPDATE_INO);
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clear_inode_flag(fi, FI_UPDATE_WRITE);
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ret = f2fs_issue_flush(F2FS_I_SB(inode));
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}
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out:
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trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
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return ret;
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}
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static pgoff_t __get_first_dirty_index(struct address_space *mapping,
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pgoff_t pgofs, int whence)
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{
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struct pagevec pvec;
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int nr_pages;
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if (whence != SEEK_DATA)
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return 0;
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/* find first dirty page index */
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pagevec_init(&pvec, 0);
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nr_pages = pagevec_lookup_tag(&pvec, mapping, &pgofs,
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PAGECACHE_TAG_DIRTY, 1);
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pgofs = nr_pages ? pvec.pages[0]->index : LONG_MAX;
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pagevec_release(&pvec);
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return pgofs;
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}
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static bool __found_offset(block_t blkaddr, pgoff_t dirty, pgoff_t pgofs,
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int whence)
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{
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switch (whence) {
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case SEEK_DATA:
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if ((blkaddr == NEW_ADDR && dirty == pgofs) ||
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(blkaddr != NEW_ADDR && blkaddr != NULL_ADDR))
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return true;
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break;
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case SEEK_HOLE:
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if (blkaddr == NULL_ADDR)
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return true;
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break;
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}
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return false;
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}
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static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence)
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{
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struct inode *inode = file->f_mapping->host;
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loff_t maxbytes = inode->i_sb->s_maxbytes;
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struct dnode_of_data dn;
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pgoff_t pgofs, end_offset, dirty;
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loff_t data_ofs = offset;
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loff_t isize;
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int err = 0;
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mutex_lock(&inode->i_mutex);
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isize = i_size_read(inode);
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if (offset >= isize)
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goto fail;
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/* handle inline data case */
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if (f2fs_has_inline_data(inode)) {
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if (whence == SEEK_HOLE)
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data_ofs = isize;
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goto found;
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}
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pgofs = (pgoff_t)(offset >> PAGE_CACHE_SHIFT);
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dirty = __get_first_dirty_index(inode->i_mapping, pgofs, whence);
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for (; data_ofs < isize; data_ofs = pgofs << PAGE_CACHE_SHIFT) {
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set_new_dnode(&dn, inode, NULL, NULL, 0);
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err = get_dnode_of_data(&dn, pgofs, LOOKUP_NODE_RA);
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if (err && err != -ENOENT) {
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goto fail;
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} else if (err == -ENOENT) {
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/* direct node does not exists */
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if (whence == SEEK_DATA) {
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pgofs = PGOFS_OF_NEXT_DNODE(pgofs,
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F2FS_I(inode));
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continue;
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} else {
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goto found;
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}
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}
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end_offset = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode));
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/* find data/hole in dnode block */
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for (; dn.ofs_in_node < end_offset;
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dn.ofs_in_node++, pgofs++,
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data_ofs = pgofs << PAGE_CACHE_SHIFT) {
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block_t blkaddr;
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blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node);
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if (__found_offset(blkaddr, dirty, pgofs, whence)) {
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f2fs_put_dnode(&dn);
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goto found;
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}
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}
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f2fs_put_dnode(&dn);
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}
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if (whence == SEEK_DATA)
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goto fail;
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found:
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if (whence == SEEK_HOLE && data_ofs > isize)
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data_ofs = isize;
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mutex_unlock(&inode->i_mutex);
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return vfs_setpos(file, data_ofs, maxbytes);
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fail:
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mutex_unlock(&inode->i_mutex);
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return -ENXIO;
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}
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static loff_t f2fs_llseek(struct file *file, loff_t offset, int whence)
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{
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struct inode *inode = file->f_mapping->host;
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loff_t maxbytes = inode->i_sb->s_maxbytes;
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switch (whence) {
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case SEEK_SET:
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case SEEK_CUR:
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case SEEK_END:
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return generic_file_llseek_size(file, offset, whence,
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maxbytes, i_size_read(inode));
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case SEEK_DATA:
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case SEEK_HOLE:
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if (offset < 0)
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return -ENXIO;
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return f2fs_seek_block(file, offset, whence);
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}
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return -EINVAL;
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}
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static int f2fs_file_mmap(struct file *file, struct vm_area_struct *vma)
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{
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file_accessed(file);
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vma->vm_ops = &f2fs_file_vm_ops;
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return 0;
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}
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int truncate_data_blocks_range(struct dnode_of_data *dn, int count)
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{
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int nr_free = 0, ofs = dn->ofs_in_node;
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struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
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struct f2fs_node *raw_node;
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__le32 *addr;
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raw_node = F2FS_NODE(dn->node_page);
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addr = blkaddr_in_node(raw_node) + ofs;
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for (; count > 0; count--, addr++, dn->ofs_in_node++) {
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block_t blkaddr = le32_to_cpu(*addr);
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if (blkaddr == NULL_ADDR)
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continue;
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update_extent_cache(NULL_ADDR, dn);
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invalidate_blocks(sbi, blkaddr);
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nr_free++;
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}
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if (nr_free) {
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dec_valid_block_count(sbi, dn->inode, nr_free);
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set_page_dirty(dn->node_page);
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sync_inode_page(dn);
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}
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dn->ofs_in_node = ofs;
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trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid,
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dn->ofs_in_node, nr_free);
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return nr_free;
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}
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void truncate_data_blocks(struct dnode_of_data *dn)
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{
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truncate_data_blocks_range(dn, ADDRS_PER_BLOCK);
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}
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static void truncate_partial_data_page(struct inode *inode, u64 from)
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{
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unsigned offset = from & (PAGE_CACHE_SIZE - 1);
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struct page *page;
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if (f2fs_has_inline_data(inode))
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return truncate_inline_data(inode, from);
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if (!offset)
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return;
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page = find_data_page(inode, from >> PAGE_CACHE_SHIFT, false);
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if (IS_ERR(page))
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return;
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lock_page(page);
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if (unlikely(!PageUptodate(page) ||
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page->mapping != inode->i_mapping))
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goto out;
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f2fs_wait_on_page_writeback(page, DATA);
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zero_user(page, offset, PAGE_CACHE_SIZE - offset);
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set_page_dirty(page);
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out:
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f2fs_put_page(page, 1);
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}
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int truncate_blocks(struct inode *inode, u64 from, bool lock)
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{
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struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
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unsigned int blocksize = inode->i_sb->s_blocksize;
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struct dnode_of_data dn;
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pgoff_t free_from;
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int count = 0, err = 0;
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trace_f2fs_truncate_blocks_enter(inode, from);
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if (f2fs_has_inline_data(inode))
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goto done;
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free_from = (pgoff_t)
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((from + blocksize - 1) >> (sbi->log_blocksize));
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if (lock)
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f2fs_lock_op(sbi);
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set_new_dnode(&dn, inode, NULL, NULL, 0);
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err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE);
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if (err) {
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if (err == -ENOENT)
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goto free_next;
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if (lock)
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f2fs_unlock_op(sbi);
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trace_f2fs_truncate_blocks_exit(inode, err);
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return err;
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}
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count = ADDRS_PER_PAGE(dn.node_page, F2FS_I(inode));
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count -= dn.ofs_in_node;
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f2fs_bug_on(sbi, count < 0);
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if (dn.ofs_in_node || IS_INODE(dn.node_page)) {
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truncate_data_blocks_range(&dn, count);
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free_from += count;
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}
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f2fs_put_dnode(&dn);
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free_next:
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err = truncate_inode_blocks(inode, free_from);
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if (lock)
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f2fs_unlock_op(sbi);
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done:
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/* lastly zero out the first data page */
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truncate_partial_data_page(inode, from);
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trace_f2fs_truncate_blocks_exit(inode, err);
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return err;
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}
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void f2fs_truncate(struct inode *inode)
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{
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if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
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S_ISLNK(inode->i_mode)))
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return;
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trace_f2fs_truncate(inode);
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if (!truncate_blocks(inode, i_size_read(inode), true)) {
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|
inode->i_mtime = inode->i_ctime = CURRENT_TIME;
|
|
mark_inode_dirty(inode);
|
|
}
|
|
}
|
|
|
|
int f2fs_getattr(struct vfsmount *mnt,
|
|
struct dentry *dentry, struct kstat *stat)
|
|
{
|
|
struct inode *inode = dentry->d_inode;
|
|
generic_fillattr(inode, stat);
|
|
stat->blocks <<= 3;
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_F2FS_FS_POSIX_ACL
|
|
static void __setattr_copy(struct inode *inode, const struct iattr *attr)
|
|
{
|
|
struct f2fs_inode_info *fi = F2FS_I(inode);
|
|
unsigned int ia_valid = attr->ia_valid;
|
|
|
|
if (ia_valid & ATTR_UID)
|
|
inode->i_uid = attr->ia_uid;
|
|
if (ia_valid & ATTR_GID)
|
|
inode->i_gid = attr->ia_gid;
|
|
if (ia_valid & ATTR_ATIME)
|
|
inode->i_atime = timespec_trunc(attr->ia_atime,
|
|
inode->i_sb->s_time_gran);
|
|
if (ia_valid & ATTR_MTIME)
|
|
inode->i_mtime = timespec_trunc(attr->ia_mtime,
|
|
inode->i_sb->s_time_gran);
|
|
if (ia_valid & ATTR_CTIME)
|
|
inode->i_ctime = timespec_trunc(attr->ia_ctime,
|
|
inode->i_sb->s_time_gran);
|
|
if (ia_valid & ATTR_MODE) {
|
|
umode_t mode = attr->ia_mode;
|
|
|
|
if (!in_group_p(inode->i_gid) && !capable(CAP_FSETID))
|
|
mode &= ~S_ISGID;
|
|
set_acl_inode(fi, mode);
|
|
}
|
|
}
|
|
#else
|
|
#define __setattr_copy setattr_copy
|
|
#endif
|
|
|
|
int f2fs_setattr(struct dentry *dentry, struct iattr *attr)
|
|
{
|
|
struct inode *inode = dentry->d_inode;
|
|
struct f2fs_inode_info *fi = F2FS_I(inode);
|
|
int err;
|
|
|
|
err = inode_change_ok(inode, attr);
|
|
if (err)
|
|
return err;
|
|
|
|
if (attr->ia_valid & ATTR_SIZE) {
|
|
err = f2fs_convert_inline_data(inode, attr->ia_size, NULL);
|
|
if (err)
|
|
return err;
|
|
|
|
if (attr->ia_size != i_size_read(inode)) {
|
|
truncate_setsize(inode, attr->ia_size);
|
|
f2fs_truncate(inode);
|
|
f2fs_balance_fs(F2FS_I_SB(inode));
|
|
} else {
|
|
/*
|
|
* giving a chance to truncate blocks past EOF which
|
|
* are fallocated with FALLOC_FL_KEEP_SIZE.
|
|
*/
|
|
f2fs_truncate(inode);
|
|
}
|
|
}
|
|
|
|
__setattr_copy(inode, attr);
|
|
|
|
if (attr->ia_valid & ATTR_MODE) {
|
|
err = posix_acl_chmod(inode, get_inode_mode(inode));
|
|
if (err || is_inode_flag_set(fi, FI_ACL_MODE)) {
|
|
inode->i_mode = fi->i_acl_mode;
|
|
clear_inode_flag(fi, FI_ACL_MODE);
|
|
}
|
|
}
|
|
|
|
mark_inode_dirty(inode);
|
|
return err;
|
|
}
|
|
|
|
const struct inode_operations f2fs_file_inode_operations = {
|
|
.getattr = f2fs_getattr,
|
|
.setattr = f2fs_setattr,
|
|
.get_acl = f2fs_get_acl,
|
|
.set_acl = f2fs_set_acl,
|
|
#ifdef CONFIG_F2FS_FS_XATTR
|
|
.setxattr = generic_setxattr,
|
|
.getxattr = generic_getxattr,
|
|
.listxattr = f2fs_listxattr,
|
|
.removexattr = generic_removexattr,
|
|
#endif
|
|
.fiemap = f2fs_fiemap,
|
|
};
|
|
|
|
static void fill_zero(struct inode *inode, pgoff_t index,
|
|
loff_t start, loff_t len)
|
|
{
|
|
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
|
|
struct page *page;
|
|
|
|
if (!len)
|
|
return;
|
|
|
|
f2fs_balance_fs(sbi);
|
|
|
|
f2fs_lock_op(sbi);
|
|
page = get_new_data_page(inode, NULL, index, false);
|
|
f2fs_unlock_op(sbi);
|
|
|
|
if (!IS_ERR(page)) {
|
|
f2fs_wait_on_page_writeback(page, DATA);
|
|
zero_user(page, start, len);
|
|
set_page_dirty(page);
|
|
f2fs_put_page(page, 1);
|
|
}
|
|
}
|
|
|
|
int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end)
|
|
{
|
|
pgoff_t index;
|
|
int err;
|
|
|
|
for (index = pg_start; index < pg_end; index++) {
|
|
struct dnode_of_data dn;
|
|
|
|
set_new_dnode(&dn, inode, NULL, NULL, 0);
|
|
err = get_dnode_of_data(&dn, index, LOOKUP_NODE);
|
|
if (err) {
|
|
if (err == -ENOENT)
|
|
continue;
|
|
return err;
|
|
}
|
|
|
|
if (dn.data_blkaddr != NULL_ADDR)
|
|
truncate_data_blocks_range(&dn, 1);
|
|
f2fs_put_dnode(&dn);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int punch_hole(struct inode *inode, loff_t offset, loff_t len)
|
|
{
|
|
pgoff_t pg_start, pg_end;
|
|
loff_t off_start, off_end;
|
|
int ret = 0;
|
|
|
|
if (!S_ISREG(inode->i_mode))
|
|
return -EOPNOTSUPP;
|
|
|
|
/* skip punching hole beyond i_size */
|
|
if (offset >= inode->i_size)
|
|
return ret;
|
|
|
|
ret = f2fs_convert_inline_data(inode, MAX_INLINE_DATA + 1, NULL);
|
|
if (ret)
|
|
return ret;
|
|
|
|
pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT;
|
|
pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT;
|
|
|
|
off_start = offset & (PAGE_CACHE_SIZE - 1);
|
|
off_end = (offset + len) & (PAGE_CACHE_SIZE - 1);
|
|
|
|
if (pg_start == pg_end) {
|
|
fill_zero(inode, pg_start, off_start,
|
|
off_end - off_start);
|
|
} else {
|
|
if (off_start)
|
|
fill_zero(inode, pg_start++, off_start,
|
|
PAGE_CACHE_SIZE - off_start);
|
|
if (off_end)
|
|
fill_zero(inode, pg_end, 0, off_end);
|
|
|
|
if (pg_start < pg_end) {
|
|
struct address_space *mapping = inode->i_mapping;
|
|
loff_t blk_start, blk_end;
|
|
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
|
|
|
|
f2fs_balance_fs(sbi);
|
|
|
|
blk_start = pg_start << PAGE_CACHE_SHIFT;
|
|
blk_end = pg_end << PAGE_CACHE_SHIFT;
|
|
truncate_inode_pages_range(mapping, blk_start,
|
|
blk_end - 1);
|
|
|
|
f2fs_lock_op(sbi);
|
|
ret = truncate_hole(inode, pg_start, pg_end);
|
|
f2fs_unlock_op(sbi);
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int expand_inode_data(struct inode *inode, loff_t offset,
|
|
loff_t len, int mode)
|
|
{
|
|
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
|
|
pgoff_t index, pg_start, pg_end;
|
|
loff_t new_size = i_size_read(inode);
|
|
loff_t off_start, off_end;
|
|
int ret = 0;
|
|
|
|
f2fs_balance_fs(sbi);
|
|
|
|
ret = inode_newsize_ok(inode, (len + offset));
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = f2fs_convert_inline_data(inode, offset + len, NULL);
|
|
if (ret)
|
|
return ret;
|
|
|
|
pg_start = ((unsigned long long) offset) >> PAGE_CACHE_SHIFT;
|
|
pg_end = ((unsigned long long) offset + len) >> PAGE_CACHE_SHIFT;
|
|
|
|
off_start = offset & (PAGE_CACHE_SIZE - 1);
|
|
off_end = (offset + len) & (PAGE_CACHE_SIZE - 1);
|
|
|
|
f2fs_lock_op(sbi);
|
|
|
|
for (index = pg_start; index <= pg_end; index++) {
|
|
struct dnode_of_data dn;
|
|
|
|
if (index == pg_end && !off_end)
|
|
goto noalloc;
|
|
|
|
set_new_dnode(&dn, inode, NULL, NULL, 0);
|
|
ret = f2fs_reserve_block(&dn, index);
|
|
if (ret)
|
|
break;
|
|
noalloc:
|
|
if (pg_start == pg_end)
|
|
new_size = offset + len;
|
|
else if (index == pg_start && off_start)
|
|
new_size = (index + 1) << PAGE_CACHE_SHIFT;
|
|
else if (index == pg_end)
|
|
new_size = (index << PAGE_CACHE_SHIFT) + off_end;
|
|
else
|
|
new_size += PAGE_CACHE_SIZE;
|
|
}
|
|
|
|
if (!(mode & FALLOC_FL_KEEP_SIZE) &&
|
|
i_size_read(inode) < new_size) {
|
|
i_size_write(inode, new_size);
|
|
mark_inode_dirty(inode);
|
|
update_inode_page(inode);
|
|
}
|
|
f2fs_unlock_op(sbi);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static long f2fs_fallocate(struct file *file, int mode,
|
|
loff_t offset, loff_t len)
|
|
{
|
|
struct inode *inode = file_inode(file);
|
|
long ret;
|
|
|
|
if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
|
|
return -EOPNOTSUPP;
|
|
|
|
mutex_lock(&inode->i_mutex);
|
|
|
|
if (mode & FALLOC_FL_PUNCH_HOLE)
|
|
ret = punch_hole(inode, offset, len);
|
|
else
|
|
ret = expand_inode_data(inode, offset, len, mode);
|
|
|
|
if (!ret) {
|
|
inode->i_mtime = inode->i_ctime = CURRENT_TIME;
|
|
mark_inode_dirty(inode);
|
|
}
|
|
|
|
mutex_unlock(&inode->i_mutex);
|
|
|
|
trace_f2fs_fallocate(inode, mode, offset, len, ret);
|
|
return ret;
|
|
}
|
|
|
|
#define F2FS_REG_FLMASK (~(FS_DIRSYNC_FL | FS_TOPDIR_FL))
|
|
#define F2FS_OTHER_FLMASK (FS_NODUMP_FL | FS_NOATIME_FL)
|
|
|
|
static inline __u32 f2fs_mask_flags(umode_t mode, __u32 flags)
|
|
{
|
|
if (S_ISDIR(mode))
|
|
return flags;
|
|
else if (S_ISREG(mode))
|
|
return flags & F2FS_REG_FLMASK;
|
|
else
|
|
return flags & F2FS_OTHER_FLMASK;
|
|
}
|
|
|
|
static int f2fs_ioc_getflags(struct file *filp, unsigned long arg)
|
|
{
|
|
struct inode *inode = file_inode(filp);
|
|
struct f2fs_inode_info *fi = F2FS_I(inode);
|
|
unsigned int flags = fi->i_flags & FS_FL_USER_VISIBLE;
|
|
return put_user(flags, (int __user *)arg);
|
|
}
|
|
|
|
static int f2fs_ioc_setflags(struct file *filp, unsigned long arg)
|
|
{
|
|
struct inode *inode = file_inode(filp);
|
|
struct f2fs_inode_info *fi = F2FS_I(inode);
|
|
unsigned int flags = fi->i_flags & FS_FL_USER_VISIBLE;
|
|
unsigned int oldflags;
|
|
int ret;
|
|
|
|
ret = mnt_want_write_file(filp);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (!inode_owner_or_capable(inode)) {
|
|
ret = -EACCES;
|
|
goto out;
|
|
}
|
|
|
|
if (get_user(flags, (int __user *)arg)) {
|
|
ret = -EFAULT;
|
|
goto out;
|
|
}
|
|
|
|
flags = f2fs_mask_flags(inode->i_mode, flags);
|
|
|
|
mutex_lock(&inode->i_mutex);
|
|
|
|
oldflags = fi->i_flags;
|
|
|
|
if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) {
|
|
if (!capable(CAP_LINUX_IMMUTABLE)) {
|
|
mutex_unlock(&inode->i_mutex);
|
|
ret = -EPERM;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
flags = flags & FS_FL_USER_MODIFIABLE;
|
|
flags |= oldflags & ~FS_FL_USER_MODIFIABLE;
|
|
fi->i_flags = flags;
|
|
mutex_unlock(&inode->i_mutex);
|
|
|
|
f2fs_set_inode_flags(inode);
|
|
inode->i_ctime = CURRENT_TIME;
|
|
mark_inode_dirty(inode);
|
|
out:
|
|
mnt_drop_write_file(filp);
|
|
return ret;
|
|
}
|
|
|
|
static int f2fs_ioc_start_atomic_write(struct file *filp)
|
|
{
|
|
struct inode *inode = file_inode(filp);
|
|
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
|
|
|
|
if (!inode_owner_or_capable(inode))
|
|
return -EACCES;
|
|
|
|
f2fs_balance_fs(sbi);
|
|
|
|
set_inode_flag(F2FS_I(inode), FI_ATOMIC_FILE);
|
|
|
|
return f2fs_convert_inline_data(inode, MAX_INLINE_DATA + 1, NULL);
|
|
}
|
|
|
|
static int f2fs_ioc_commit_atomic_write(struct file *filp)
|
|
{
|
|
struct inode *inode = file_inode(filp);
|
|
int ret;
|
|
|
|
if (!inode_owner_or_capable(inode))
|
|
return -EACCES;
|
|
|
|
if (f2fs_is_volatile_file(inode))
|
|
return 0;
|
|
|
|
ret = mnt_want_write_file(filp);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (f2fs_is_atomic_file(inode))
|
|
commit_inmem_pages(inode, false);
|
|
|
|
ret = f2fs_sync_file(filp, 0, LONG_MAX, 0);
|
|
mnt_drop_write_file(filp);
|
|
return ret;
|
|
}
|
|
|
|
static int f2fs_ioc_start_volatile_write(struct file *filp)
|
|
{
|
|
struct inode *inode = file_inode(filp);
|
|
|
|
if (!inode_owner_or_capable(inode))
|
|
return -EACCES;
|
|
|
|
set_inode_flag(F2FS_I(inode), FI_VOLATILE_FILE);
|
|
return 0;
|
|
}
|
|
|
|
static int f2fs_ioc_fitrim(struct file *filp, unsigned long arg)
|
|
{
|
|
struct inode *inode = file_inode(filp);
|
|
struct super_block *sb = inode->i_sb;
|
|
struct request_queue *q = bdev_get_queue(sb->s_bdev);
|
|
struct fstrim_range range;
|
|
int ret;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
if (!blk_queue_discard(q))
|
|
return -EOPNOTSUPP;
|
|
|
|
if (copy_from_user(&range, (struct fstrim_range __user *)arg,
|
|
sizeof(range)))
|
|
return -EFAULT;
|
|
|
|
range.minlen = max((unsigned int)range.minlen,
|
|
q->limits.discard_granularity);
|
|
ret = f2fs_trim_fs(F2FS_SB(sb), &range);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (copy_to_user((struct fstrim_range __user *)arg, &range,
|
|
sizeof(range)))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
|
|
{
|
|
switch (cmd) {
|
|
case F2FS_IOC_GETFLAGS:
|
|
return f2fs_ioc_getflags(filp, arg);
|
|
case F2FS_IOC_SETFLAGS:
|
|
return f2fs_ioc_setflags(filp, arg);
|
|
case F2FS_IOC_START_ATOMIC_WRITE:
|
|
return f2fs_ioc_start_atomic_write(filp);
|
|
case F2FS_IOC_COMMIT_ATOMIC_WRITE:
|
|
return f2fs_ioc_commit_atomic_write(filp);
|
|
case F2FS_IOC_START_VOLATILE_WRITE:
|
|
return f2fs_ioc_start_volatile_write(filp);
|
|
case FITRIM:
|
|
return f2fs_ioc_fitrim(filp, arg);
|
|
default:
|
|
return -ENOTTY;
|
|
}
|
|
}
|
|
|
|
#ifdef CONFIG_COMPAT
|
|
long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
|
|
{
|
|
switch (cmd) {
|
|
case F2FS_IOC32_GETFLAGS:
|
|
cmd = F2FS_IOC_GETFLAGS;
|
|
break;
|
|
case F2FS_IOC32_SETFLAGS:
|
|
cmd = F2FS_IOC_SETFLAGS;
|
|
break;
|
|
default:
|
|
return -ENOIOCTLCMD;
|
|
}
|
|
return f2fs_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
|
|
}
|
|
#endif
|
|
|
|
const struct file_operations f2fs_file_operations = {
|
|
.llseek = f2fs_llseek,
|
|
.read = new_sync_read,
|
|
.write = new_sync_write,
|
|
.read_iter = generic_file_read_iter,
|
|
.write_iter = generic_file_write_iter,
|
|
.open = generic_file_open,
|
|
.mmap = f2fs_file_mmap,
|
|
.fsync = f2fs_sync_file,
|
|
.fallocate = f2fs_fallocate,
|
|
.unlocked_ioctl = f2fs_ioctl,
|
|
#ifdef CONFIG_COMPAT
|
|
.compat_ioctl = f2fs_compat_ioctl,
|
|
#endif
|
|
.splice_read = generic_file_splice_read,
|
|
.splice_write = iter_file_splice_write,
|
|
};
|