mirror of https://gitee.com/openkylin/linux.git
2345 lines
53 KiB
C
2345 lines
53 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 <linux/uio.h>
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#include <linux/uuid.h>
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#include <linux/file.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 "gc.h"
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#include "trace.h"
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#include <trace/events/f2fs.h>
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static int f2fs_vm_page_mkwrite(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(vmf->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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sb_start_pagefault(inode->i_sb);
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f2fs_bug_on(sbi, f2fs_has_inline_data(inode));
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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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if (err) {
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f2fs_unlock_op(sbi);
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goto out;
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}
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f2fs_put_dnode(&dn);
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f2fs_unlock_op(sbi);
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f2fs_balance_fs(sbi, dn.node_changed);
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file_update_time(vmf->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 (((loff_t)(page->index + 1) << PAGE_SHIFT) >
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i_size_read(inode)) {
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unsigned offset;
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offset = i_size_read(inode) & ~PAGE_MASK;
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zero_user_segment(page, offset, PAGE_SIZE);
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}
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set_page_dirty(page);
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if (!PageUptodate(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, false);
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/* wait for GCed encrypted page writeback */
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if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode))
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f2fs_wait_on_encrypted_page_writeback(sbi, dn.data_blkaddr);
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out:
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sb_end_pagefault(inode->i_sb);
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f2fs_update_time(sbi, REQ_TIME);
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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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};
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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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if (file_enc_name(inode))
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return 0;
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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, 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 (is_sbi_flag_set(sbi, SBI_NEED_CP))
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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 (test_opt(sbi, FASTBOOT))
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need_cp = true;
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else if (sbi->active_logs == 2)
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need_cp = true;
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return need_cp;
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}
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static bool need_inode_page_update(struct f2fs_sb_info *sbi, nid_t ino)
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{
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struct page *i = find_get_page(NODE_MAPPING(sbi), ino);
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bool ret = false;
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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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ret = true;
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f2fs_put_page(i, 0);
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return ret;
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}
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static void try_to_fix_pino(struct inode *inode)
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{
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struct f2fs_inode_info *fi = F2FS_I(inode);
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nid_t pino;
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down_write(&fi->i_sem);
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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_pino_write(inode, pino);
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file_got_pino(inode);
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}
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up_write(&fi->i_sem);
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}
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static int f2fs_do_sync_file(struct file *file, loff_t start, loff_t end,
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int datasync, bool atomic)
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{
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struct inode *inode = file->f_mapping->host;
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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 (datasync || get_dirty_pages(inode) <= SM_I(sbi)->min_fsync_blocks)
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set_inode_flag(inode, 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(inode, 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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/* if the inode is dirty, let's recover all the time */
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if (!f2fs_skip_inode_update(inode, datasync)) {
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f2fs_write_inode(inode, NULL);
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goto go_write;
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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(inode, FI_APPEND_WRITE) &&
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!exist_written_data(sbi, ino, APPEND_INO)) {
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/* it may call write_inode just prior to fsync */
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if (need_inode_page_update(sbi, ino))
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goto go_write;
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if (is_inode_flag_set(inode, 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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/*
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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(&F2FS_I(inode)->i_sem);
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need_cp = need_do_checkpoint(inode);
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up_read(&F2FS_I(inode)->i_sem);
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if (need_cp) {
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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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/*
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* We've secured consistency through sync_fs. Following pino
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* will be used only for fsynced inodes after checkpoint.
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*/
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try_to_fix_pino(inode);
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clear_inode_flag(inode, FI_APPEND_WRITE);
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clear_inode_flag(inode, FI_UPDATE_WRITE);
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goto out;
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}
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sync_nodes:
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ret = fsync_node_pages(sbi, inode, &wbc, atomic);
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if (ret)
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goto out;
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/* if cp_error was enabled, we should avoid infinite loop */
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if (unlikely(f2fs_cp_error(sbi))) {
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ret = -EIO;
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goto out;
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}
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if (need_inode_block_update(sbi, ino)) {
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f2fs_mark_inode_dirty_sync(inode, true);
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f2fs_write_inode(inode, NULL);
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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_ino_entry(sbi, ino, APPEND_INO);
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clear_inode_flag(inode, FI_APPEND_WRITE);
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flush_out:
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remove_ino_entry(sbi, ino, UPDATE_INO);
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clear_inode_flag(inode, FI_UPDATE_WRITE);
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if (!atomic)
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ret = f2fs_issue_flush(sbi);
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f2fs_update_time(sbi, REQ_TIME);
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out:
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trace_f2fs_sync_file_exit(inode, need_cp, datasync, ret);
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f2fs_trace_ios(NULL, 1);
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return ret;
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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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return f2fs_do_sync_file(file, start, end, datasync, false);
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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 : ULONG_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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inode_lock(inode);
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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) || f2fs_has_inline_dentry(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_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 = (loff_t)pgofs << PAGE_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);
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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 = get_next_page_offset(&dn, pgofs);
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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, 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 = (loff_t)pgofs << PAGE_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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inode_unlock(inode);
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return vfs_setpos(file, data_ofs, maxbytes);
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fail:
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inode_unlock(inode);
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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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|
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return -EINVAL;
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}
|
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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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struct inode *inode = file_inode(file);
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int err;
|
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|
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if (f2fs_encrypted_inode(inode)) {
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err = fscrypt_get_encryption_info(inode);
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if (err)
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return 0;
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if (!f2fs_encrypted_inode(inode))
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return -ENOKEY;
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}
|
|
|
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/* we don't need to use inline_data strictly */
|
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err = f2fs_convert_inline_inode(inode);
|
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if (err)
|
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return err;
|
|
|
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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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static int f2fs_file_open(struct inode *inode, struct file *filp)
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{
|
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int ret = generic_file_open(inode, filp);
|
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struct dentry *dir;
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|
|
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if (!ret && f2fs_encrypted_inode(inode)) {
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ret = fscrypt_get_encryption_info(inode);
|
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if (ret)
|
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return -EACCES;
|
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if (!fscrypt_has_encryption_key(inode))
|
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return -ENOKEY;
|
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}
|
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dir = dget_parent(file_dentry(filp));
|
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if (f2fs_encrypted_inode(d_inode(dir)) &&
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!fscrypt_has_permitted_context(d_inode(dir), inode)) {
|
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dput(dir);
|
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return -EPERM;
|
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}
|
|
dput(dir);
|
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return ret;
|
|
}
|
|
|
|
int truncate_data_blocks_range(struct dnode_of_data *dn, int count)
|
|
{
|
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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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int nr_free = 0, ofs = dn->ofs_in_node, len = count;
|
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__le32 *addr;
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|
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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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|
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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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|
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dn->data_blkaddr = NULL_ADDR;
|
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set_data_blkaddr(dn);
|
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invalidate_blocks(sbi, blkaddr);
|
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if (dn->ofs_in_node == 0 && IS_INODE(dn->node_page))
|
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clear_inode_flag(dn->inode, FI_FIRST_BLOCK_WRITTEN);
|
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nr_free++;
|
|
}
|
|
|
|
if (nr_free) {
|
|
pgoff_t fofs;
|
|
/*
|
|
* once we invalidate valid blkaddr in range [ofs, ofs + count],
|
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* we will invalidate all blkaddr in the whole range.
|
|
*/
|
|
fofs = start_bidx_of_node(ofs_of_node(dn->node_page),
|
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dn->inode) + ofs;
|
|
f2fs_update_extent_cache_range(dn, fofs, 0, len);
|
|
dec_valid_block_count(sbi, dn->inode, nr_free);
|
|
}
|
|
dn->ofs_in_node = ofs;
|
|
|
|
f2fs_update_time(sbi, REQ_TIME);
|
|
trace_f2fs_truncate_data_blocks_range(dn->inode, dn->nid,
|
|
dn->ofs_in_node, nr_free);
|
|
return nr_free;
|
|
}
|
|
|
|
void truncate_data_blocks(struct dnode_of_data *dn)
|
|
{
|
|
truncate_data_blocks_range(dn, ADDRS_PER_BLOCK);
|
|
}
|
|
|
|
static int truncate_partial_data_page(struct inode *inode, u64 from,
|
|
bool cache_only)
|
|
{
|
|
unsigned offset = from & (PAGE_SIZE - 1);
|
|
pgoff_t index = from >> PAGE_SHIFT;
|
|
struct address_space *mapping = inode->i_mapping;
|
|
struct page *page;
|
|
|
|
if (!offset && !cache_only)
|
|
return 0;
|
|
|
|
if (cache_only) {
|
|
page = find_lock_page(mapping, index);
|
|
if (page && PageUptodate(page))
|
|
goto truncate_out;
|
|
f2fs_put_page(page, 1);
|
|
return 0;
|
|
}
|
|
|
|
page = get_lock_data_page(inode, index, true);
|
|
if (IS_ERR(page))
|
|
return PTR_ERR(page) == -ENOENT ? 0 : PTR_ERR(page);
|
|
truncate_out:
|
|
f2fs_wait_on_page_writeback(page, DATA, true);
|
|
zero_user(page, offset, PAGE_SIZE - offset);
|
|
if (!cache_only || !f2fs_encrypted_inode(inode) ||
|
|
!S_ISREG(inode->i_mode))
|
|
set_page_dirty(page);
|
|
f2fs_put_page(page, 1);
|
|
return 0;
|
|
}
|
|
|
|
int truncate_blocks(struct inode *inode, u64 from, bool lock)
|
|
{
|
|
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
|
|
unsigned int blocksize = inode->i_sb->s_blocksize;
|
|
struct dnode_of_data dn;
|
|
pgoff_t free_from;
|
|
int count = 0, err = 0;
|
|
struct page *ipage;
|
|
bool truncate_page = false;
|
|
|
|
trace_f2fs_truncate_blocks_enter(inode, from);
|
|
|
|
free_from = (pgoff_t)F2FS_BYTES_TO_BLK(from + blocksize - 1);
|
|
|
|
if (free_from >= sbi->max_file_blocks)
|
|
goto free_partial;
|
|
|
|
if (lock)
|
|
f2fs_lock_op(sbi);
|
|
|
|
ipage = get_node_page(sbi, inode->i_ino);
|
|
if (IS_ERR(ipage)) {
|
|
err = PTR_ERR(ipage);
|
|
goto out;
|
|
}
|
|
|
|
if (f2fs_has_inline_data(inode)) {
|
|
truncate_inline_inode(ipage, from);
|
|
if (from == 0)
|
|
clear_inode_flag(inode, FI_DATA_EXIST);
|
|
f2fs_put_page(ipage, 1);
|
|
truncate_page = true;
|
|
goto out;
|
|
}
|
|
|
|
set_new_dnode(&dn, inode, ipage, NULL, 0);
|
|
err = get_dnode_of_data(&dn, free_from, LOOKUP_NODE_RA);
|
|
if (err) {
|
|
if (err == -ENOENT)
|
|
goto free_next;
|
|
goto out;
|
|
}
|
|
|
|
count = ADDRS_PER_PAGE(dn.node_page, inode);
|
|
|
|
count -= dn.ofs_in_node;
|
|
f2fs_bug_on(sbi, count < 0);
|
|
|
|
if (dn.ofs_in_node || IS_INODE(dn.node_page)) {
|
|
truncate_data_blocks_range(&dn, count);
|
|
free_from += count;
|
|
}
|
|
|
|
f2fs_put_dnode(&dn);
|
|
free_next:
|
|
err = truncate_inode_blocks(inode, free_from);
|
|
out:
|
|
if (lock)
|
|
f2fs_unlock_op(sbi);
|
|
free_partial:
|
|
/* lastly zero out the first data page */
|
|
if (!err)
|
|
err = truncate_partial_data_page(inode, from, truncate_page);
|
|
|
|
trace_f2fs_truncate_blocks_exit(inode, err);
|
|
return err;
|
|
}
|
|
|
|
int f2fs_truncate(struct inode *inode)
|
|
{
|
|
int err;
|
|
|
|
if (!(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode) ||
|
|
S_ISLNK(inode->i_mode)))
|
|
return 0;
|
|
|
|
trace_f2fs_truncate(inode);
|
|
|
|
#ifdef CONFIG_F2FS_FAULT_INJECTION
|
|
if (time_to_inject(F2FS_I_SB(inode), FAULT_TRUNCATE)) {
|
|
f2fs_show_injection_info(FAULT_TRUNCATE);
|
|
return -EIO;
|
|
}
|
|
#endif
|
|
/* we should check inline_data size */
|
|
if (!f2fs_may_inline_data(inode)) {
|
|
err = f2fs_convert_inline_inode(inode);
|
|
if (err)
|
|
return err;
|
|
}
|
|
|
|
err = truncate_blocks(inode, i_size_read(inode), true);
|
|
if (err)
|
|
return err;
|
|
|
|
inode->i_mtime = inode->i_ctime = current_time(inode);
|
|
f2fs_mark_inode_dirty_sync(inode, false);
|
|
return 0;
|
|
}
|
|
|
|
int f2fs_getattr(const struct path *path, struct kstat *stat,
|
|
u32 request_mask, unsigned int flags)
|
|
{
|
|
struct inode *inode = d_inode(path->dentry);
|
|
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)
|
|
{
|
|
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(inode, mode);
|
|
}
|
|
}
|
|
#else
|
|
#define __setattr_copy setattr_copy
|
|
#endif
|
|
|
|
int f2fs_setattr(struct dentry *dentry, struct iattr *attr)
|
|
{
|
|
struct inode *inode = d_inode(dentry);
|
|
int err;
|
|
bool size_changed = false;
|
|
|
|
err = setattr_prepare(dentry, attr);
|
|
if (err)
|
|
return err;
|
|
|
|
if (attr->ia_valid & ATTR_SIZE) {
|
|
if (f2fs_encrypted_inode(inode) &&
|
|
fscrypt_get_encryption_info(inode))
|
|
return -EACCES;
|
|
|
|
if (attr->ia_size <= i_size_read(inode)) {
|
|
truncate_setsize(inode, attr->ia_size);
|
|
err = f2fs_truncate(inode);
|
|
if (err)
|
|
return err;
|
|
} else {
|
|
/*
|
|
* do not trim all blocks after i_size if target size is
|
|
* larger than i_size.
|
|
*/
|
|
truncate_setsize(inode, attr->ia_size);
|
|
|
|
/* should convert inline inode here */
|
|
if (!f2fs_may_inline_data(inode)) {
|
|
err = f2fs_convert_inline_inode(inode);
|
|
if (err)
|
|
return err;
|
|
}
|
|
inode->i_mtime = inode->i_ctime = current_time(inode);
|
|
}
|
|
|
|
size_changed = true;
|
|
}
|
|
|
|
__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(inode, FI_ACL_MODE)) {
|
|
inode->i_mode = F2FS_I(inode)->i_acl_mode;
|
|
clear_inode_flag(inode, FI_ACL_MODE);
|
|
}
|
|
}
|
|
|
|
/* file size may changed here */
|
|
f2fs_mark_inode_dirty_sync(inode, size_changed);
|
|
|
|
/* inode change will produce dirty node pages flushed by checkpoint */
|
|
f2fs_balance_fs(F2FS_I_SB(inode), true);
|
|
|
|
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
|
|
.listxattr = f2fs_listxattr,
|
|
#endif
|
|
.fiemap = f2fs_fiemap,
|
|
};
|
|
|
|
static int 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 0;
|
|
|
|
f2fs_balance_fs(sbi, true);
|
|
|
|
f2fs_lock_op(sbi);
|
|
page = get_new_data_page(inode, NULL, index, false);
|
|
f2fs_unlock_op(sbi);
|
|
|
|
if (IS_ERR(page))
|
|
return PTR_ERR(page);
|
|
|
|
f2fs_wait_on_page_writeback(page, DATA, true);
|
|
zero_user(page, start, len);
|
|
set_page_dirty(page);
|
|
f2fs_put_page(page, 1);
|
|
return 0;
|
|
}
|
|
|
|
int truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end)
|
|
{
|
|
int err;
|
|
|
|
while (pg_start < pg_end) {
|
|
struct dnode_of_data dn;
|
|
pgoff_t end_offset, count;
|
|
|
|
set_new_dnode(&dn, inode, NULL, NULL, 0);
|
|
err = get_dnode_of_data(&dn, pg_start, LOOKUP_NODE);
|
|
if (err) {
|
|
if (err == -ENOENT) {
|
|
pg_start++;
|
|
continue;
|
|
}
|
|
return err;
|
|
}
|
|
|
|
end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
|
|
count = min(end_offset - dn.ofs_in_node, pg_end - pg_start);
|
|
|
|
f2fs_bug_on(F2FS_I_SB(inode), count == 0 || count > end_offset);
|
|
|
|
truncate_data_blocks_range(&dn, count);
|
|
f2fs_put_dnode(&dn);
|
|
|
|
pg_start += count;
|
|
}
|
|
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;
|
|
|
|
ret = f2fs_convert_inline_inode(inode);
|
|
if (ret)
|
|
return ret;
|
|
|
|
pg_start = ((unsigned long long) offset) >> PAGE_SHIFT;
|
|
pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT;
|
|
|
|
off_start = offset & (PAGE_SIZE - 1);
|
|
off_end = (offset + len) & (PAGE_SIZE - 1);
|
|
|
|
if (pg_start == pg_end) {
|
|
ret = fill_zero(inode, pg_start, off_start,
|
|
off_end - off_start);
|
|
if (ret)
|
|
return ret;
|
|
} else {
|
|
if (off_start) {
|
|
ret = fill_zero(inode, pg_start++, off_start,
|
|
PAGE_SIZE - off_start);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
if (off_end) {
|
|
ret = fill_zero(inode, pg_end, 0, off_end);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
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, true);
|
|
|
|
blk_start = (loff_t)pg_start << PAGE_SHIFT;
|
|
blk_end = (loff_t)pg_end << PAGE_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 __read_out_blkaddrs(struct inode *inode, block_t *blkaddr,
|
|
int *do_replace, pgoff_t off, pgoff_t len)
|
|
{
|
|
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
|
|
struct dnode_of_data dn;
|
|
int ret, done, i;
|
|
|
|
next_dnode:
|
|
set_new_dnode(&dn, inode, NULL, NULL, 0);
|
|
ret = get_dnode_of_data(&dn, off, LOOKUP_NODE_RA);
|
|
if (ret && ret != -ENOENT) {
|
|
return ret;
|
|
} else if (ret == -ENOENT) {
|
|
if (dn.max_level == 0)
|
|
return -ENOENT;
|
|
done = min((pgoff_t)ADDRS_PER_BLOCK - dn.ofs_in_node, len);
|
|
blkaddr += done;
|
|
do_replace += done;
|
|
goto next;
|
|
}
|
|
|
|
done = min((pgoff_t)ADDRS_PER_PAGE(dn.node_page, inode) -
|
|
dn.ofs_in_node, len);
|
|
for (i = 0; i < done; i++, blkaddr++, do_replace++, dn.ofs_in_node++) {
|
|
*blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node);
|
|
if (!is_checkpointed_data(sbi, *blkaddr)) {
|
|
|
|
if (test_opt(sbi, LFS)) {
|
|
f2fs_put_dnode(&dn);
|
|
return -ENOTSUPP;
|
|
}
|
|
|
|
/* do not invalidate this block address */
|
|
f2fs_update_data_blkaddr(&dn, NULL_ADDR);
|
|
*do_replace = 1;
|
|
}
|
|
}
|
|
f2fs_put_dnode(&dn);
|
|
next:
|
|
len -= done;
|
|
off += done;
|
|
if (len)
|
|
goto next_dnode;
|
|
return 0;
|
|
}
|
|
|
|
static int __roll_back_blkaddrs(struct inode *inode, block_t *blkaddr,
|
|
int *do_replace, pgoff_t off, int len)
|
|
{
|
|
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
|
|
struct dnode_of_data dn;
|
|
int ret, i;
|
|
|
|
for (i = 0; i < len; i++, do_replace++, blkaddr++) {
|
|
if (*do_replace == 0)
|
|
continue;
|
|
|
|
set_new_dnode(&dn, inode, NULL, NULL, 0);
|
|
ret = get_dnode_of_data(&dn, off + i, LOOKUP_NODE_RA);
|
|
if (ret) {
|
|
dec_valid_block_count(sbi, inode, 1);
|
|
invalidate_blocks(sbi, *blkaddr);
|
|
} else {
|
|
f2fs_update_data_blkaddr(&dn, *blkaddr);
|
|
}
|
|
f2fs_put_dnode(&dn);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int __clone_blkaddrs(struct inode *src_inode, struct inode *dst_inode,
|
|
block_t *blkaddr, int *do_replace,
|
|
pgoff_t src, pgoff_t dst, pgoff_t len, bool full)
|
|
{
|
|
struct f2fs_sb_info *sbi = F2FS_I_SB(src_inode);
|
|
pgoff_t i = 0;
|
|
int ret;
|
|
|
|
while (i < len) {
|
|
if (blkaddr[i] == NULL_ADDR && !full) {
|
|
i++;
|
|
continue;
|
|
}
|
|
|
|
if (do_replace[i] || blkaddr[i] == NULL_ADDR) {
|
|
struct dnode_of_data dn;
|
|
struct node_info ni;
|
|
size_t new_size;
|
|
pgoff_t ilen;
|
|
|
|
set_new_dnode(&dn, dst_inode, NULL, NULL, 0);
|
|
ret = get_dnode_of_data(&dn, dst + i, ALLOC_NODE);
|
|
if (ret)
|
|
return ret;
|
|
|
|
get_node_info(sbi, dn.nid, &ni);
|
|
ilen = min((pgoff_t)
|
|
ADDRS_PER_PAGE(dn.node_page, dst_inode) -
|
|
dn.ofs_in_node, len - i);
|
|
do {
|
|
dn.data_blkaddr = datablock_addr(dn.node_page,
|
|
dn.ofs_in_node);
|
|
truncate_data_blocks_range(&dn, 1);
|
|
|
|
if (do_replace[i]) {
|
|
f2fs_i_blocks_write(src_inode,
|
|
1, false);
|
|
f2fs_i_blocks_write(dst_inode,
|
|
1, true);
|
|
f2fs_replace_block(sbi, &dn, dn.data_blkaddr,
|
|
blkaddr[i], ni.version, true, false);
|
|
|
|
do_replace[i] = 0;
|
|
}
|
|
dn.ofs_in_node++;
|
|
i++;
|
|
new_size = (dst + i) << PAGE_SHIFT;
|
|
if (dst_inode->i_size < new_size)
|
|
f2fs_i_size_write(dst_inode, new_size);
|
|
} while (--ilen && (do_replace[i] || blkaddr[i] == NULL_ADDR));
|
|
|
|
f2fs_put_dnode(&dn);
|
|
} else {
|
|
struct page *psrc, *pdst;
|
|
|
|
psrc = get_lock_data_page(src_inode, src + i, true);
|
|
if (IS_ERR(psrc))
|
|
return PTR_ERR(psrc);
|
|
pdst = get_new_data_page(dst_inode, NULL, dst + i,
|
|
true);
|
|
if (IS_ERR(pdst)) {
|
|
f2fs_put_page(psrc, 1);
|
|
return PTR_ERR(pdst);
|
|
}
|
|
f2fs_copy_page(psrc, pdst);
|
|
set_page_dirty(pdst);
|
|
f2fs_put_page(pdst, 1);
|
|
f2fs_put_page(psrc, 1);
|
|
|
|
ret = truncate_hole(src_inode, src + i, src + i + 1);
|
|
if (ret)
|
|
return ret;
|
|
i++;
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static int __exchange_data_block(struct inode *src_inode,
|
|
struct inode *dst_inode, pgoff_t src, pgoff_t dst,
|
|
pgoff_t len, bool full)
|
|
{
|
|
block_t *src_blkaddr;
|
|
int *do_replace;
|
|
pgoff_t olen;
|
|
int ret;
|
|
|
|
while (len) {
|
|
olen = min((pgoff_t)4 * ADDRS_PER_BLOCK, len);
|
|
|
|
src_blkaddr = f2fs_kvzalloc(sizeof(block_t) * olen, GFP_KERNEL);
|
|
if (!src_blkaddr)
|
|
return -ENOMEM;
|
|
|
|
do_replace = f2fs_kvzalloc(sizeof(int) * olen, GFP_KERNEL);
|
|
if (!do_replace) {
|
|
kvfree(src_blkaddr);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
ret = __read_out_blkaddrs(src_inode, src_blkaddr,
|
|
do_replace, src, olen);
|
|
if (ret)
|
|
goto roll_back;
|
|
|
|
ret = __clone_blkaddrs(src_inode, dst_inode, src_blkaddr,
|
|
do_replace, src, dst, olen, full);
|
|
if (ret)
|
|
goto roll_back;
|
|
|
|
src += olen;
|
|
dst += olen;
|
|
len -= olen;
|
|
|
|
kvfree(src_blkaddr);
|
|
kvfree(do_replace);
|
|
}
|
|
return 0;
|
|
|
|
roll_back:
|
|
__roll_back_blkaddrs(src_inode, src_blkaddr, do_replace, src, len);
|
|
kvfree(src_blkaddr);
|
|
kvfree(do_replace);
|
|
return ret;
|
|
}
|
|
|
|
static int f2fs_do_collapse(struct inode *inode, pgoff_t start, pgoff_t end)
|
|
{
|
|
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
|
|
pgoff_t nrpages = (i_size_read(inode) + PAGE_SIZE - 1) / PAGE_SIZE;
|
|
int ret;
|
|
|
|
f2fs_balance_fs(sbi, true);
|
|
f2fs_lock_op(sbi);
|
|
|
|
f2fs_drop_extent_tree(inode);
|
|
|
|
ret = __exchange_data_block(inode, inode, end, start, nrpages - end, true);
|
|
f2fs_unlock_op(sbi);
|
|
return ret;
|
|
}
|
|
|
|
static int f2fs_collapse_range(struct inode *inode, loff_t offset, loff_t len)
|
|
{
|
|
pgoff_t pg_start, pg_end;
|
|
loff_t new_size;
|
|
int ret;
|
|
|
|
if (offset + len >= i_size_read(inode))
|
|
return -EINVAL;
|
|
|
|
/* collapse range should be aligned to block size of f2fs. */
|
|
if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1))
|
|
return -EINVAL;
|
|
|
|
ret = f2fs_convert_inline_inode(inode);
|
|
if (ret)
|
|
return ret;
|
|
|
|
pg_start = offset >> PAGE_SHIFT;
|
|
pg_end = (offset + len) >> PAGE_SHIFT;
|
|
|
|
/* write out all dirty pages from offset */
|
|
ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
|
|
if (ret)
|
|
return ret;
|
|
|
|
truncate_pagecache(inode, offset);
|
|
|
|
ret = f2fs_do_collapse(inode, pg_start, pg_end);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* write out all moved pages, if possible */
|
|
filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
|
|
truncate_pagecache(inode, offset);
|
|
|
|
new_size = i_size_read(inode) - len;
|
|
truncate_pagecache(inode, new_size);
|
|
|
|
ret = truncate_blocks(inode, new_size, true);
|
|
if (!ret)
|
|
f2fs_i_size_write(inode, new_size);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int f2fs_do_zero_range(struct dnode_of_data *dn, pgoff_t start,
|
|
pgoff_t end)
|
|
{
|
|
struct f2fs_sb_info *sbi = F2FS_I_SB(dn->inode);
|
|
pgoff_t index = start;
|
|
unsigned int ofs_in_node = dn->ofs_in_node;
|
|
blkcnt_t count = 0;
|
|
int ret;
|
|
|
|
for (; index < end; index++, dn->ofs_in_node++) {
|
|
if (datablock_addr(dn->node_page, dn->ofs_in_node) == NULL_ADDR)
|
|
count++;
|
|
}
|
|
|
|
dn->ofs_in_node = ofs_in_node;
|
|
ret = reserve_new_blocks(dn, count);
|
|
if (ret)
|
|
return ret;
|
|
|
|
dn->ofs_in_node = ofs_in_node;
|
|
for (index = start; index < end; index++, dn->ofs_in_node++) {
|
|
dn->data_blkaddr =
|
|
datablock_addr(dn->node_page, dn->ofs_in_node);
|
|
/*
|
|
* reserve_new_blocks will not guarantee entire block
|
|
* allocation.
|
|
*/
|
|
if (dn->data_blkaddr == NULL_ADDR) {
|
|
ret = -ENOSPC;
|
|
break;
|
|
}
|
|
if (dn->data_blkaddr != NEW_ADDR) {
|
|
invalidate_blocks(sbi, dn->data_blkaddr);
|
|
dn->data_blkaddr = NEW_ADDR;
|
|
set_data_blkaddr(dn);
|
|
}
|
|
}
|
|
|
|
f2fs_update_extent_cache_range(dn, start, 0, index - start);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int f2fs_zero_range(struct inode *inode, loff_t offset, loff_t len,
|
|
int mode)
|
|
{
|
|
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
|
|
struct address_space *mapping = inode->i_mapping;
|
|
pgoff_t index, pg_start, pg_end;
|
|
loff_t new_size = i_size_read(inode);
|
|
loff_t off_start, off_end;
|
|
int ret = 0;
|
|
|
|
ret = inode_newsize_ok(inode, (len + offset));
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = f2fs_convert_inline_inode(inode);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = filemap_write_and_wait_range(mapping, offset, offset + len - 1);
|
|
if (ret)
|
|
return ret;
|
|
|
|
truncate_pagecache_range(inode, offset, offset + len - 1);
|
|
|
|
pg_start = ((unsigned long long) offset) >> PAGE_SHIFT;
|
|
pg_end = ((unsigned long long) offset + len) >> PAGE_SHIFT;
|
|
|
|
off_start = offset & (PAGE_SIZE - 1);
|
|
off_end = (offset + len) & (PAGE_SIZE - 1);
|
|
|
|
if (pg_start == pg_end) {
|
|
ret = fill_zero(inode, pg_start, off_start,
|
|
off_end - off_start);
|
|
if (ret)
|
|
return ret;
|
|
|
|
new_size = max_t(loff_t, new_size, offset + len);
|
|
} else {
|
|
if (off_start) {
|
|
ret = fill_zero(inode, pg_start++, off_start,
|
|
PAGE_SIZE - off_start);
|
|
if (ret)
|
|
return ret;
|
|
|
|
new_size = max_t(loff_t, new_size,
|
|
(loff_t)pg_start << PAGE_SHIFT);
|
|
}
|
|
|
|
for (index = pg_start; index < pg_end;) {
|
|
struct dnode_of_data dn;
|
|
unsigned int end_offset;
|
|
pgoff_t end;
|
|
|
|
f2fs_lock_op(sbi);
|
|
|
|
set_new_dnode(&dn, inode, NULL, NULL, 0);
|
|
ret = get_dnode_of_data(&dn, index, ALLOC_NODE);
|
|
if (ret) {
|
|
f2fs_unlock_op(sbi);
|
|
goto out;
|
|
}
|
|
|
|
end_offset = ADDRS_PER_PAGE(dn.node_page, inode);
|
|
end = min(pg_end, end_offset - dn.ofs_in_node + index);
|
|
|
|
ret = f2fs_do_zero_range(&dn, index, end);
|
|
f2fs_put_dnode(&dn);
|
|
f2fs_unlock_op(sbi);
|
|
|
|
f2fs_balance_fs(sbi, dn.node_changed);
|
|
|
|
if (ret)
|
|
goto out;
|
|
|
|
index = end;
|
|
new_size = max_t(loff_t, new_size,
|
|
(loff_t)index << PAGE_SHIFT);
|
|
}
|
|
|
|
if (off_end) {
|
|
ret = fill_zero(inode, pg_end, 0, off_end);
|
|
if (ret)
|
|
goto out;
|
|
|
|
new_size = max_t(loff_t, new_size, offset + len);
|
|
}
|
|
}
|
|
|
|
out:
|
|
if (!(mode & FALLOC_FL_KEEP_SIZE) && i_size_read(inode) < new_size)
|
|
f2fs_i_size_write(inode, new_size);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int f2fs_insert_range(struct inode *inode, loff_t offset, loff_t len)
|
|
{
|
|
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
|
|
pgoff_t nr, pg_start, pg_end, delta, idx;
|
|
loff_t new_size;
|
|
int ret = 0;
|
|
|
|
new_size = i_size_read(inode) + len;
|
|
ret = inode_newsize_ok(inode, new_size);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (offset >= i_size_read(inode))
|
|
return -EINVAL;
|
|
|
|
/* insert range should be aligned to block size of f2fs. */
|
|
if (offset & (F2FS_BLKSIZE - 1) || len & (F2FS_BLKSIZE - 1))
|
|
return -EINVAL;
|
|
|
|
ret = f2fs_convert_inline_inode(inode);
|
|
if (ret)
|
|
return ret;
|
|
|
|
f2fs_balance_fs(sbi, true);
|
|
|
|
ret = truncate_blocks(inode, i_size_read(inode), true);
|
|
if (ret)
|
|
return ret;
|
|
|
|
/* write out all dirty pages from offset */
|
|
ret = filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
|
|
if (ret)
|
|
return ret;
|
|
|
|
truncate_pagecache(inode, offset);
|
|
|
|
pg_start = offset >> PAGE_SHIFT;
|
|
pg_end = (offset + len) >> PAGE_SHIFT;
|
|
delta = pg_end - pg_start;
|
|
idx = (i_size_read(inode) + PAGE_SIZE - 1) / PAGE_SIZE;
|
|
|
|
while (!ret && idx > pg_start) {
|
|
nr = idx - pg_start;
|
|
if (nr > delta)
|
|
nr = delta;
|
|
idx -= nr;
|
|
|
|
f2fs_lock_op(sbi);
|
|
f2fs_drop_extent_tree(inode);
|
|
|
|
ret = __exchange_data_block(inode, inode, idx,
|
|
idx + delta, nr, false);
|
|
f2fs_unlock_op(sbi);
|
|
}
|
|
|
|
/* write out all moved pages, if possible */
|
|
filemap_write_and_wait_range(inode->i_mapping, offset, LLONG_MAX);
|
|
truncate_pagecache(inode, offset);
|
|
|
|
if (!ret)
|
|
f2fs_i_size_write(inode, new_size);
|
|
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);
|
|
struct f2fs_map_blocks map = { .m_next_pgofs = NULL };
|
|
pgoff_t pg_end;
|
|
loff_t new_size = i_size_read(inode);
|
|
loff_t off_end;
|
|
int err;
|
|
|
|
err = inode_newsize_ok(inode, (len + offset));
|
|
if (err)
|
|
return err;
|
|
|
|
err = f2fs_convert_inline_inode(inode);
|
|
if (err)
|
|
return err;
|
|
|
|
f2fs_balance_fs(sbi, true);
|
|
|
|
pg_end = ((unsigned long long)offset + len) >> PAGE_SHIFT;
|
|
off_end = (offset + len) & (PAGE_SIZE - 1);
|
|
|
|
map.m_lblk = ((unsigned long long)offset) >> PAGE_SHIFT;
|
|
map.m_len = pg_end - map.m_lblk;
|
|
if (off_end)
|
|
map.m_len++;
|
|
|
|
err = f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_AIO);
|
|
if (err) {
|
|
pgoff_t last_off;
|
|
|
|
if (!map.m_len)
|
|
return err;
|
|
|
|
last_off = map.m_lblk + map.m_len - 1;
|
|
|
|
/* update new size to the failed position */
|
|
new_size = (last_off == pg_end) ? offset + len:
|
|
(loff_t)(last_off + 1) << PAGE_SHIFT;
|
|
} else {
|
|
new_size = ((loff_t)pg_end << PAGE_SHIFT) + off_end;
|
|
}
|
|
|
|
if (!(mode & FALLOC_FL_KEEP_SIZE) && i_size_read(inode) < new_size)
|
|
f2fs_i_size_write(inode, new_size);
|
|
|
|
return err;
|
|
}
|
|
|
|
static long f2fs_fallocate(struct file *file, int mode,
|
|
loff_t offset, loff_t len)
|
|
{
|
|
struct inode *inode = file_inode(file);
|
|
long ret = 0;
|
|
|
|
/* f2fs only support ->fallocate for regular file */
|
|
if (!S_ISREG(inode->i_mode))
|
|
return -EINVAL;
|
|
|
|
if (f2fs_encrypted_inode(inode) &&
|
|
(mode & (FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_INSERT_RANGE)))
|
|
return -EOPNOTSUPP;
|
|
|
|
if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE |
|
|
FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZERO_RANGE |
|
|
FALLOC_FL_INSERT_RANGE))
|
|
return -EOPNOTSUPP;
|
|
|
|
inode_lock(inode);
|
|
|
|
if (mode & FALLOC_FL_PUNCH_HOLE) {
|
|
if (offset >= inode->i_size)
|
|
goto out;
|
|
|
|
ret = punch_hole(inode, offset, len);
|
|
} else if (mode & FALLOC_FL_COLLAPSE_RANGE) {
|
|
ret = f2fs_collapse_range(inode, offset, len);
|
|
} else if (mode & FALLOC_FL_ZERO_RANGE) {
|
|
ret = f2fs_zero_range(inode, offset, len, mode);
|
|
} else if (mode & FALLOC_FL_INSERT_RANGE) {
|
|
ret = f2fs_insert_range(inode, offset, len);
|
|
} else {
|
|
ret = expand_inode_data(inode, offset, len, mode);
|
|
}
|
|
|
|
if (!ret) {
|
|
inode->i_mtime = inode->i_ctime = current_time(inode);
|
|
f2fs_mark_inode_dirty_sync(inode, false);
|
|
if (mode & FALLOC_FL_KEEP_SIZE)
|
|
file_set_keep_isize(inode);
|
|
f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
|
|
}
|
|
|
|
out:
|
|
inode_unlock(inode);
|
|
|
|
trace_f2fs_fallocate(inode, mode, offset, len, ret);
|
|
return ret;
|
|
}
|
|
|
|
static int f2fs_release_file(struct inode *inode, struct file *filp)
|
|
{
|
|
/*
|
|
* f2fs_relase_file is called at every close calls. So we should
|
|
* not drop any inmemory pages by close called by other process.
|
|
*/
|
|
if (!(filp->f_mode & FMODE_WRITE) ||
|
|
atomic_read(&inode->i_writecount) != 1)
|
|
return 0;
|
|
|
|
/* some remained atomic pages should discarded */
|
|
if (f2fs_is_atomic_file(inode))
|
|
drop_inmem_pages(inode);
|
|
if (f2fs_is_volatile_file(inode)) {
|
|
clear_inode_flag(inode, FI_VOLATILE_FILE);
|
|
set_inode_flag(inode, FI_DROP_CACHE);
|
|
filemap_fdatawrite(inode->i_mapping);
|
|
clear_inode_flag(inode, FI_DROP_CACHE);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
#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;
|
|
unsigned int oldflags;
|
|
int ret;
|
|
|
|
if (!inode_owner_or_capable(inode))
|
|
return -EACCES;
|
|
|
|
if (get_user(flags, (int __user *)arg))
|
|
return -EFAULT;
|
|
|
|
ret = mnt_want_write_file(filp);
|
|
if (ret)
|
|
return ret;
|
|
|
|
flags = f2fs_mask_flags(inode->i_mode, flags);
|
|
|
|
inode_lock(inode);
|
|
|
|
oldflags = fi->i_flags;
|
|
|
|
if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) {
|
|
if (!capable(CAP_LINUX_IMMUTABLE)) {
|
|
inode_unlock(inode);
|
|
ret = -EPERM;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
flags = flags & FS_FL_USER_MODIFIABLE;
|
|
flags |= oldflags & ~FS_FL_USER_MODIFIABLE;
|
|
fi->i_flags = flags;
|
|
inode_unlock(inode);
|
|
|
|
inode->i_ctime = current_time(inode);
|
|
f2fs_set_inode_flags(inode);
|
|
out:
|
|
mnt_drop_write_file(filp);
|
|
return ret;
|
|
}
|
|
|
|
static int f2fs_ioc_getversion(struct file *filp, unsigned long arg)
|
|
{
|
|
struct inode *inode = file_inode(filp);
|
|
|
|
return put_user(inode->i_generation, (int __user *)arg);
|
|
}
|
|
|
|
static int f2fs_ioc_start_atomic_write(struct file *filp)
|
|
{
|
|
struct inode *inode = file_inode(filp);
|
|
int ret;
|
|
|
|
if (!inode_owner_or_capable(inode))
|
|
return -EACCES;
|
|
|
|
if (!S_ISREG(inode->i_mode))
|
|
return -EINVAL;
|
|
|
|
ret = mnt_want_write_file(filp);
|
|
if (ret)
|
|
return ret;
|
|
|
|
inode_lock(inode);
|
|
|
|
if (f2fs_is_atomic_file(inode))
|
|
goto out;
|
|
|
|
ret = f2fs_convert_inline_inode(inode);
|
|
if (ret)
|
|
goto out;
|
|
|
|
set_inode_flag(inode, FI_ATOMIC_FILE);
|
|
f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
|
|
|
|
if (!get_dirty_pages(inode))
|
|
goto out;
|
|
|
|
f2fs_msg(F2FS_I_SB(inode)->sb, KERN_WARNING,
|
|
"Unexpected flush for atomic writes: ino=%lu, npages=%u",
|
|
inode->i_ino, get_dirty_pages(inode));
|
|
ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX);
|
|
if (ret)
|
|
clear_inode_flag(inode, FI_ATOMIC_FILE);
|
|
out:
|
|
stat_inc_atomic_write(inode);
|
|
stat_update_max_atomic_write(inode);
|
|
inode_unlock(inode);
|
|
mnt_drop_write_file(filp);
|
|
return ret;
|
|
}
|
|
|
|
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;
|
|
|
|
ret = mnt_want_write_file(filp);
|
|
if (ret)
|
|
return ret;
|
|
|
|
inode_lock(inode);
|
|
|
|
if (f2fs_is_volatile_file(inode))
|
|
goto err_out;
|
|
|
|
if (f2fs_is_atomic_file(inode)) {
|
|
ret = commit_inmem_pages(inode);
|
|
if (ret)
|
|
goto err_out;
|
|
|
|
ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 0, true);
|
|
if (!ret) {
|
|
clear_inode_flag(inode, FI_ATOMIC_FILE);
|
|
stat_dec_atomic_write(inode);
|
|
}
|
|
} else {
|
|
ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 0, true);
|
|
}
|
|
err_out:
|
|
inode_unlock(inode);
|
|
mnt_drop_write_file(filp);
|
|
return ret;
|
|
}
|
|
|
|
static int f2fs_ioc_start_volatile_write(struct file *filp)
|
|
{
|
|
struct inode *inode = file_inode(filp);
|
|
int ret;
|
|
|
|
if (!inode_owner_or_capable(inode))
|
|
return -EACCES;
|
|
|
|
if (!S_ISREG(inode->i_mode))
|
|
return -EINVAL;
|
|
|
|
ret = mnt_want_write_file(filp);
|
|
if (ret)
|
|
return ret;
|
|
|
|
inode_lock(inode);
|
|
|
|
if (f2fs_is_volatile_file(inode))
|
|
goto out;
|
|
|
|
ret = f2fs_convert_inline_inode(inode);
|
|
if (ret)
|
|
goto out;
|
|
|
|
set_inode_flag(inode, FI_VOLATILE_FILE);
|
|
f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
|
|
out:
|
|
inode_unlock(inode);
|
|
mnt_drop_write_file(filp);
|
|
return ret;
|
|
}
|
|
|
|
static int f2fs_ioc_release_volatile_write(struct file *filp)
|
|
{
|
|
struct inode *inode = file_inode(filp);
|
|
int ret;
|
|
|
|
if (!inode_owner_or_capable(inode))
|
|
return -EACCES;
|
|
|
|
ret = mnt_want_write_file(filp);
|
|
if (ret)
|
|
return ret;
|
|
|
|
inode_lock(inode);
|
|
|
|
if (!f2fs_is_volatile_file(inode))
|
|
goto out;
|
|
|
|
if (!f2fs_is_first_block_written(inode)) {
|
|
ret = truncate_partial_data_page(inode, 0, true);
|
|
goto out;
|
|
}
|
|
|
|
ret = punch_hole(inode, 0, F2FS_BLKSIZE);
|
|
out:
|
|
inode_unlock(inode);
|
|
mnt_drop_write_file(filp);
|
|
return ret;
|
|
}
|
|
|
|
static int f2fs_ioc_abort_volatile_write(struct file *filp)
|
|
{
|
|
struct inode *inode = file_inode(filp);
|
|
int ret;
|
|
|
|
if (!inode_owner_or_capable(inode))
|
|
return -EACCES;
|
|
|
|
ret = mnt_want_write_file(filp);
|
|
if (ret)
|
|
return ret;
|
|
|
|
inode_lock(inode);
|
|
|
|
if (f2fs_is_atomic_file(inode))
|
|
drop_inmem_pages(inode);
|
|
if (f2fs_is_volatile_file(inode)) {
|
|
clear_inode_flag(inode, FI_VOLATILE_FILE);
|
|
ret = f2fs_do_sync_file(filp, 0, LLONG_MAX, 0, true);
|
|
}
|
|
|
|
inode_unlock(inode);
|
|
|
|
mnt_drop_write_file(filp);
|
|
f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
|
|
return ret;
|
|
}
|
|
|
|
static int f2fs_ioc_shutdown(struct file *filp, unsigned long arg)
|
|
{
|
|
struct inode *inode = file_inode(filp);
|
|
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
|
|
struct super_block *sb = sbi->sb;
|
|
__u32 in;
|
|
int ret;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
if (get_user(in, (__u32 __user *)arg))
|
|
return -EFAULT;
|
|
|
|
ret = mnt_want_write_file(filp);
|
|
if (ret)
|
|
return ret;
|
|
|
|
switch (in) {
|
|
case F2FS_GOING_DOWN_FULLSYNC:
|
|
sb = freeze_bdev(sb->s_bdev);
|
|
if (sb && !IS_ERR(sb)) {
|
|
f2fs_stop_checkpoint(sbi, false);
|
|
thaw_bdev(sb->s_bdev, sb);
|
|
}
|
|
break;
|
|
case F2FS_GOING_DOWN_METASYNC:
|
|
/* do checkpoint only */
|
|
f2fs_sync_fs(sb, 1);
|
|
f2fs_stop_checkpoint(sbi, false);
|
|
break;
|
|
case F2FS_GOING_DOWN_NOSYNC:
|
|
f2fs_stop_checkpoint(sbi, false);
|
|
break;
|
|
case F2FS_GOING_DOWN_METAFLUSH:
|
|
sync_meta_pages(sbi, META, LONG_MAX);
|
|
f2fs_stop_checkpoint(sbi, false);
|
|
break;
|
|
default:
|
|
ret = -EINVAL;
|
|
goto out;
|
|
}
|
|
f2fs_update_time(sbi, REQ_TIME);
|
|
out:
|
|
mnt_drop_write_file(filp);
|
|
return ret;
|
|
}
|
|
|
|
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;
|
|
|
|
ret = mnt_want_write_file(filp);
|
|
if (ret)
|
|
return ret;
|
|
|
|
range.minlen = max((unsigned int)range.minlen,
|
|
q->limits.discard_granularity);
|
|
ret = f2fs_trim_fs(F2FS_SB(sb), &range);
|
|
mnt_drop_write_file(filp);
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
if (copy_to_user((struct fstrim_range __user *)arg, &range,
|
|
sizeof(range)))
|
|
return -EFAULT;
|
|
f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
|
|
return 0;
|
|
}
|
|
|
|
static bool uuid_is_nonzero(__u8 u[16])
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < 16; i++)
|
|
if (u[i])
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
static int f2fs_ioc_set_encryption_policy(struct file *filp, unsigned long arg)
|
|
{
|
|
struct inode *inode = file_inode(filp);
|
|
|
|
f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
|
|
|
|
return fscrypt_ioctl_set_policy(filp, (const void __user *)arg);
|
|
}
|
|
|
|
static int f2fs_ioc_get_encryption_policy(struct file *filp, unsigned long arg)
|
|
{
|
|
return fscrypt_ioctl_get_policy(filp, (void __user *)arg);
|
|
}
|
|
|
|
static int f2fs_ioc_get_encryption_pwsalt(struct file *filp, unsigned long arg)
|
|
{
|
|
struct inode *inode = file_inode(filp);
|
|
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
|
|
int err;
|
|
|
|
if (!f2fs_sb_has_crypto(inode->i_sb))
|
|
return -EOPNOTSUPP;
|
|
|
|
if (uuid_is_nonzero(sbi->raw_super->encrypt_pw_salt))
|
|
goto got_it;
|
|
|
|
err = mnt_want_write_file(filp);
|
|
if (err)
|
|
return err;
|
|
|
|
/* update superblock with uuid */
|
|
generate_random_uuid(sbi->raw_super->encrypt_pw_salt);
|
|
|
|
err = f2fs_commit_super(sbi, false);
|
|
if (err) {
|
|
/* undo new data */
|
|
memset(sbi->raw_super->encrypt_pw_salt, 0, 16);
|
|
mnt_drop_write_file(filp);
|
|
return err;
|
|
}
|
|
mnt_drop_write_file(filp);
|
|
got_it:
|
|
if (copy_to_user((__u8 __user *)arg, sbi->raw_super->encrypt_pw_salt,
|
|
16))
|
|
return -EFAULT;
|
|
return 0;
|
|
}
|
|
|
|
static int f2fs_ioc_gc(struct file *filp, unsigned long arg)
|
|
{
|
|
struct inode *inode = file_inode(filp);
|
|
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
|
|
__u32 sync;
|
|
int ret;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
if (get_user(sync, (__u32 __user *)arg))
|
|
return -EFAULT;
|
|
|
|
if (f2fs_readonly(sbi->sb))
|
|
return -EROFS;
|
|
|
|
ret = mnt_want_write_file(filp);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (!sync) {
|
|
if (!mutex_trylock(&sbi->gc_mutex)) {
|
|
ret = -EBUSY;
|
|
goto out;
|
|
}
|
|
} else {
|
|
mutex_lock(&sbi->gc_mutex);
|
|
}
|
|
|
|
ret = f2fs_gc(sbi, sync, true);
|
|
out:
|
|
mnt_drop_write_file(filp);
|
|
return ret;
|
|
}
|
|
|
|
static int f2fs_ioc_write_checkpoint(struct file *filp, unsigned long arg)
|
|
{
|
|
struct inode *inode = file_inode(filp);
|
|
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
|
|
int ret;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
if (f2fs_readonly(sbi->sb))
|
|
return -EROFS;
|
|
|
|
ret = mnt_want_write_file(filp);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = f2fs_sync_fs(sbi->sb, 1);
|
|
|
|
mnt_drop_write_file(filp);
|
|
return ret;
|
|
}
|
|
|
|
static int f2fs_defragment_range(struct f2fs_sb_info *sbi,
|
|
struct file *filp,
|
|
struct f2fs_defragment *range)
|
|
{
|
|
struct inode *inode = file_inode(filp);
|
|
struct f2fs_map_blocks map = { .m_next_pgofs = NULL };
|
|
struct extent_info ei = {0,0,0};
|
|
pgoff_t pg_start, pg_end;
|
|
unsigned int blk_per_seg = sbi->blocks_per_seg;
|
|
unsigned int total = 0, sec_num;
|
|
unsigned int pages_per_sec = sbi->segs_per_sec * blk_per_seg;
|
|
block_t blk_end = 0;
|
|
bool fragmented = false;
|
|
int err;
|
|
|
|
/* if in-place-update policy is enabled, don't waste time here */
|
|
if (need_inplace_update(inode))
|
|
return -EINVAL;
|
|
|
|
pg_start = range->start >> PAGE_SHIFT;
|
|
pg_end = (range->start + range->len) >> PAGE_SHIFT;
|
|
|
|
f2fs_balance_fs(sbi, true);
|
|
|
|
inode_lock(inode);
|
|
|
|
/* writeback all dirty pages in the range */
|
|
err = filemap_write_and_wait_range(inode->i_mapping, range->start,
|
|
range->start + range->len - 1);
|
|
if (err)
|
|
goto out;
|
|
|
|
/*
|
|
* lookup mapping info in extent cache, skip defragmenting if physical
|
|
* block addresses are continuous.
|
|
*/
|
|
if (f2fs_lookup_extent_cache(inode, pg_start, &ei)) {
|
|
if (ei.fofs + ei.len >= pg_end)
|
|
goto out;
|
|
}
|
|
|
|
map.m_lblk = pg_start;
|
|
|
|
/*
|
|
* lookup mapping info in dnode page cache, skip defragmenting if all
|
|
* physical block addresses are continuous even if there are hole(s)
|
|
* in logical blocks.
|
|
*/
|
|
while (map.m_lblk < pg_end) {
|
|
map.m_len = pg_end - map.m_lblk;
|
|
err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_READ);
|
|
if (err)
|
|
goto out;
|
|
|
|
if (!(map.m_flags & F2FS_MAP_FLAGS)) {
|
|
map.m_lblk++;
|
|
continue;
|
|
}
|
|
|
|
if (blk_end && blk_end != map.m_pblk) {
|
|
fragmented = true;
|
|
break;
|
|
}
|
|
blk_end = map.m_pblk + map.m_len;
|
|
|
|
map.m_lblk += map.m_len;
|
|
}
|
|
|
|
if (!fragmented)
|
|
goto out;
|
|
|
|
map.m_lblk = pg_start;
|
|
map.m_len = pg_end - pg_start;
|
|
|
|
sec_num = (map.m_len + pages_per_sec - 1) / pages_per_sec;
|
|
|
|
/*
|
|
* make sure there are enough free section for LFS allocation, this can
|
|
* avoid defragment running in SSR mode when free section are allocated
|
|
* intensively
|
|
*/
|
|
if (has_not_enough_free_secs(sbi, 0, sec_num)) {
|
|
err = -EAGAIN;
|
|
goto out;
|
|
}
|
|
|
|
while (map.m_lblk < pg_end) {
|
|
pgoff_t idx;
|
|
int cnt = 0;
|
|
|
|
do_map:
|
|
map.m_len = pg_end - map.m_lblk;
|
|
err = f2fs_map_blocks(inode, &map, 0, F2FS_GET_BLOCK_READ);
|
|
if (err)
|
|
goto clear_out;
|
|
|
|
if (!(map.m_flags & F2FS_MAP_FLAGS)) {
|
|
map.m_lblk++;
|
|
continue;
|
|
}
|
|
|
|
set_inode_flag(inode, FI_DO_DEFRAG);
|
|
|
|
idx = map.m_lblk;
|
|
while (idx < map.m_lblk + map.m_len && cnt < blk_per_seg) {
|
|
struct page *page;
|
|
|
|
page = get_lock_data_page(inode, idx, true);
|
|
if (IS_ERR(page)) {
|
|
err = PTR_ERR(page);
|
|
goto clear_out;
|
|
}
|
|
|
|
set_page_dirty(page);
|
|
f2fs_put_page(page, 1);
|
|
|
|
idx++;
|
|
cnt++;
|
|
total++;
|
|
}
|
|
|
|
map.m_lblk = idx;
|
|
|
|
if (idx < pg_end && cnt < blk_per_seg)
|
|
goto do_map;
|
|
|
|
clear_inode_flag(inode, FI_DO_DEFRAG);
|
|
|
|
err = filemap_fdatawrite(inode->i_mapping);
|
|
if (err)
|
|
goto out;
|
|
}
|
|
clear_out:
|
|
clear_inode_flag(inode, FI_DO_DEFRAG);
|
|
out:
|
|
inode_unlock(inode);
|
|
if (!err)
|
|
range->len = (u64)total << PAGE_SHIFT;
|
|
return err;
|
|
}
|
|
|
|
static int f2fs_ioc_defragment(struct file *filp, unsigned long arg)
|
|
{
|
|
struct inode *inode = file_inode(filp);
|
|
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
|
|
struct f2fs_defragment range;
|
|
int err;
|
|
|
|
if (!capable(CAP_SYS_ADMIN))
|
|
return -EPERM;
|
|
|
|
if (!S_ISREG(inode->i_mode))
|
|
return -EINVAL;
|
|
|
|
if (f2fs_readonly(sbi->sb))
|
|
return -EROFS;
|
|
|
|
if (copy_from_user(&range, (struct f2fs_defragment __user *)arg,
|
|
sizeof(range)))
|
|
return -EFAULT;
|
|
|
|
/* verify alignment of offset & size */
|
|
if (range.start & (F2FS_BLKSIZE - 1) || range.len & (F2FS_BLKSIZE - 1))
|
|
return -EINVAL;
|
|
|
|
if (unlikely((range.start + range.len) >> PAGE_SHIFT >
|
|
sbi->max_file_blocks))
|
|
return -EINVAL;
|
|
|
|
err = mnt_want_write_file(filp);
|
|
if (err)
|
|
return err;
|
|
|
|
err = f2fs_defragment_range(sbi, filp, &range);
|
|
mnt_drop_write_file(filp);
|
|
|
|
f2fs_update_time(sbi, REQ_TIME);
|
|
if (err < 0)
|
|
return err;
|
|
|
|
if (copy_to_user((struct f2fs_defragment __user *)arg, &range,
|
|
sizeof(range)))
|
|
return -EFAULT;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int f2fs_move_file_range(struct file *file_in, loff_t pos_in,
|
|
struct file *file_out, loff_t pos_out, size_t len)
|
|
{
|
|
struct inode *src = file_inode(file_in);
|
|
struct inode *dst = file_inode(file_out);
|
|
struct f2fs_sb_info *sbi = F2FS_I_SB(src);
|
|
size_t olen = len, dst_max_i_size = 0;
|
|
size_t dst_osize;
|
|
int ret;
|
|
|
|
if (file_in->f_path.mnt != file_out->f_path.mnt ||
|
|
src->i_sb != dst->i_sb)
|
|
return -EXDEV;
|
|
|
|
if (unlikely(f2fs_readonly(src->i_sb)))
|
|
return -EROFS;
|
|
|
|
if (!S_ISREG(src->i_mode) || !S_ISREG(dst->i_mode))
|
|
return -EINVAL;
|
|
|
|
if (f2fs_encrypted_inode(src) || f2fs_encrypted_inode(dst))
|
|
return -EOPNOTSUPP;
|
|
|
|
if (src == dst) {
|
|
if (pos_in == pos_out)
|
|
return 0;
|
|
if (pos_out > pos_in && pos_out < pos_in + len)
|
|
return -EINVAL;
|
|
}
|
|
|
|
inode_lock(src);
|
|
if (src != dst) {
|
|
if (!inode_trylock(dst)) {
|
|
ret = -EBUSY;
|
|
goto out;
|
|
}
|
|
}
|
|
|
|
ret = -EINVAL;
|
|
if (pos_in + len > src->i_size || pos_in + len < pos_in)
|
|
goto out_unlock;
|
|
if (len == 0)
|
|
olen = len = src->i_size - pos_in;
|
|
if (pos_in + len == src->i_size)
|
|
len = ALIGN(src->i_size, F2FS_BLKSIZE) - pos_in;
|
|
if (len == 0) {
|
|
ret = 0;
|
|
goto out_unlock;
|
|
}
|
|
|
|
dst_osize = dst->i_size;
|
|
if (pos_out + olen > dst->i_size)
|
|
dst_max_i_size = pos_out + olen;
|
|
|
|
/* verify the end result is block aligned */
|
|
if (!IS_ALIGNED(pos_in, F2FS_BLKSIZE) ||
|
|
!IS_ALIGNED(pos_in + len, F2FS_BLKSIZE) ||
|
|
!IS_ALIGNED(pos_out, F2FS_BLKSIZE))
|
|
goto out_unlock;
|
|
|
|
ret = f2fs_convert_inline_inode(src);
|
|
if (ret)
|
|
goto out_unlock;
|
|
|
|
ret = f2fs_convert_inline_inode(dst);
|
|
if (ret)
|
|
goto out_unlock;
|
|
|
|
/* write out all dirty pages from offset */
|
|
ret = filemap_write_and_wait_range(src->i_mapping,
|
|
pos_in, pos_in + len);
|
|
if (ret)
|
|
goto out_unlock;
|
|
|
|
ret = filemap_write_and_wait_range(dst->i_mapping,
|
|
pos_out, pos_out + len);
|
|
if (ret)
|
|
goto out_unlock;
|
|
|
|
f2fs_balance_fs(sbi, true);
|
|
f2fs_lock_op(sbi);
|
|
ret = __exchange_data_block(src, dst, pos_in >> F2FS_BLKSIZE_BITS,
|
|
pos_out >> F2FS_BLKSIZE_BITS,
|
|
len >> F2FS_BLKSIZE_BITS, false);
|
|
|
|
if (!ret) {
|
|
if (dst_max_i_size)
|
|
f2fs_i_size_write(dst, dst_max_i_size);
|
|
else if (dst_osize != dst->i_size)
|
|
f2fs_i_size_write(dst, dst_osize);
|
|
}
|
|
f2fs_unlock_op(sbi);
|
|
out_unlock:
|
|
if (src != dst)
|
|
inode_unlock(dst);
|
|
out:
|
|
inode_unlock(src);
|
|
return ret;
|
|
}
|
|
|
|
static int f2fs_ioc_move_range(struct file *filp, unsigned long arg)
|
|
{
|
|
struct f2fs_move_range range;
|
|
struct fd dst;
|
|
int err;
|
|
|
|
if (!(filp->f_mode & FMODE_READ) ||
|
|
!(filp->f_mode & FMODE_WRITE))
|
|
return -EBADF;
|
|
|
|
if (copy_from_user(&range, (struct f2fs_move_range __user *)arg,
|
|
sizeof(range)))
|
|
return -EFAULT;
|
|
|
|
dst = fdget(range.dst_fd);
|
|
if (!dst.file)
|
|
return -EBADF;
|
|
|
|
if (!(dst.file->f_mode & FMODE_WRITE)) {
|
|
err = -EBADF;
|
|
goto err_out;
|
|
}
|
|
|
|
err = mnt_want_write_file(filp);
|
|
if (err)
|
|
goto err_out;
|
|
|
|
err = f2fs_move_file_range(filp, range.pos_in, dst.file,
|
|
range.pos_out, range.len);
|
|
|
|
mnt_drop_write_file(filp);
|
|
if (err)
|
|
goto err_out;
|
|
|
|
if (copy_to_user((struct f2fs_move_range __user *)arg,
|
|
&range, sizeof(range)))
|
|
err = -EFAULT;
|
|
err_out:
|
|
fdput(dst);
|
|
return err;
|
|
}
|
|
|
|
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_GETVERSION:
|
|
return f2fs_ioc_getversion(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 F2FS_IOC_RELEASE_VOLATILE_WRITE:
|
|
return f2fs_ioc_release_volatile_write(filp);
|
|
case F2FS_IOC_ABORT_VOLATILE_WRITE:
|
|
return f2fs_ioc_abort_volatile_write(filp);
|
|
case F2FS_IOC_SHUTDOWN:
|
|
return f2fs_ioc_shutdown(filp, arg);
|
|
case FITRIM:
|
|
return f2fs_ioc_fitrim(filp, arg);
|
|
case F2FS_IOC_SET_ENCRYPTION_POLICY:
|
|
return f2fs_ioc_set_encryption_policy(filp, arg);
|
|
case F2FS_IOC_GET_ENCRYPTION_POLICY:
|
|
return f2fs_ioc_get_encryption_policy(filp, arg);
|
|
case F2FS_IOC_GET_ENCRYPTION_PWSALT:
|
|
return f2fs_ioc_get_encryption_pwsalt(filp, arg);
|
|
case F2FS_IOC_GARBAGE_COLLECT:
|
|
return f2fs_ioc_gc(filp, arg);
|
|
case F2FS_IOC_WRITE_CHECKPOINT:
|
|
return f2fs_ioc_write_checkpoint(filp, arg);
|
|
case F2FS_IOC_DEFRAGMENT:
|
|
return f2fs_ioc_defragment(filp, arg);
|
|
case F2FS_IOC_MOVE_RANGE:
|
|
return f2fs_ioc_move_range(filp, arg);
|
|
default:
|
|
return -ENOTTY;
|
|
}
|
|
}
|
|
|
|
static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
|
|
{
|
|
struct file *file = iocb->ki_filp;
|
|
struct inode *inode = file_inode(file);
|
|
struct blk_plug plug;
|
|
ssize_t ret;
|
|
|
|
if (f2fs_encrypted_inode(inode) &&
|
|
!fscrypt_has_encryption_key(inode) &&
|
|
fscrypt_get_encryption_info(inode))
|
|
return -EACCES;
|
|
|
|
inode_lock(inode);
|
|
ret = generic_write_checks(iocb, from);
|
|
if (ret > 0) {
|
|
int err;
|
|
|
|
if (iov_iter_fault_in_readable(from, iov_iter_count(from)))
|
|
set_inode_flag(inode, FI_NO_PREALLOC);
|
|
|
|
err = f2fs_preallocate_blocks(iocb, from);
|
|
if (err) {
|
|
inode_unlock(inode);
|
|
return err;
|
|
}
|
|
blk_start_plug(&plug);
|
|
ret = __generic_file_write_iter(iocb, from);
|
|
blk_finish_plug(&plug);
|
|
clear_inode_flag(inode, FI_NO_PREALLOC);
|
|
}
|
|
inode_unlock(inode);
|
|
|
|
if (ret > 0)
|
|
ret = generic_write_sync(iocb, ret);
|
|
return ret;
|
|
}
|
|
|
|
#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;
|
|
case F2FS_IOC32_GETVERSION:
|
|
cmd = F2FS_IOC_GETVERSION;
|
|
break;
|
|
case F2FS_IOC_START_ATOMIC_WRITE:
|
|
case F2FS_IOC_COMMIT_ATOMIC_WRITE:
|
|
case F2FS_IOC_START_VOLATILE_WRITE:
|
|
case F2FS_IOC_RELEASE_VOLATILE_WRITE:
|
|
case F2FS_IOC_ABORT_VOLATILE_WRITE:
|
|
case F2FS_IOC_SHUTDOWN:
|
|
case F2FS_IOC_SET_ENCRYPTION_POLICY:
|
|
case F2FS_IOC_GET_ENCRYPTION_PWSALT:
|
|
case F2FS_IOC_GET_ENCRYPTION_POLICY:
|
|
case F2FS_IOC_GARBAGE_COLLECT:
|
|
case F2FS_IOC_WRITE_CHECKPOINT:
|
|
case F2FS_IOC_DEFRAGMENT:
|
|
break;
|
|
case F2FS_IOC_MOVE_RANGE:
|
|
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_iter = generic_file_read_iter,
|
|
.write_iter = f2fs_file_write_iter,
|
|
.open = f2fs_file_open,
|
|
.release = f2fs_release_file,
|
|
.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,
|
|
};
|