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![Linus Torvalds](/assets/img/avatar_default.png)
Pull more vfs updates from Al Viro: ">rename2() work from Miklos + current_time() from Deepa" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: fs: Replace current_fs_time() with current_time() fs: Replace CURRENT_TIME_SEC with current_time() for inode timestamps fs: Replace CURRENT_TIME with current_time() for inode timestamps fs: proc: Delete inode time initializations in proc_alloc_inode() vfs: Add current_time() api vfs: add note about i_op->rename changes to porting fs: rename "rename2" i_op to "rename" vfs: remove unused i_op->rename fs: make remaining filesystems use .rename2 libfs: support RENAME_NOREPLACE in simple_rename() fs: support RENAME_NOREPLACE for local filesystems ncpfs: fix unused variable warning
665 lines
16 KiB
C
665 lines
16 KiB
C
/*
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* fs/f2fs/inline.c
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* Copyright (c) 2013, Intel Corporation
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* Authors: Huajun Li <huajun.li@intel.com>
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* Haicheng Li <haicheng.li@intel.com>
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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 "f2fs.h"
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#include "node.h"
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bool f2fs_may_inline_data(struct inode *inode)
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{
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if (f2fs_is_atomic_file(inode))
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return false;
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if (!S_ISREG(inode->i_mode) && !S_ISLNK(inode->i_mode))
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return false;
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if (i_size_read(inode) > MAX_INLINE_DATA)
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return false;
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if (f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode))
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return false;
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return true;
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}
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bool f2fs_may_inline_dentry(struct inode *inode)
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{
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if (!test_opt(F2FS_I_SB(inode), INLINE_DENTRY))
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return false;
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if (!S_ISDIR(inode->i_mode))
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return false;
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return true;
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}
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void read_inline_data(struct page *page, struct page *ipage)
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{
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void *src_addr, *dst_addr;
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if (PageUptodate(page))
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return;
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f2fs_bug_on(F2FS_P_SB(page), page->index);
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zero_user_segment(page, MAX_INLINE_DATA, PAGE_SIZE);
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/* Copy the whole inline data block */
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src_addr = inline_data_addr(ipage);
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dst_addr = kmap_atomic(page);
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memcpy(dst_addr, src_addr, MAX_INLINE_DATA);
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flush_dcache_page(page);
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kunmap_atomic(dst_addr);
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if (!PageUptodate(page))
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SetPageUptodate(page);
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}
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bool truncate_inline_inode(struct page *ipage, u64 from)
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{
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void *addr;
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if (from >= MAX_INLINE_DATA)
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return false;
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addr = inline_data_addr(ipage);
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f2fs_wait_on_page_writeback(ipage, NODE, true);
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memset(addr + from, 0, MAX_INLINE_DATA - from);
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set_page_dirty(ipage);
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return true;
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}
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int f2fs_read_inline_data(struct inode *inode, struct page *page)
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{
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struct page *ipage;
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ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino);
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if (IS_ERR(ipage)) {
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unlock_page(page);
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return PTR_ERR(ipage);
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}
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if (!f2fs_has_inline_data(inode)) {
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f2fs_put_page(ipage, 1);
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return -EAGAIN;
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}
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if (page->index)
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zero_user_segment(page, 0, PAGE_SIZE);
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else
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read_inline_data(page, ipage);
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if (!PageUptodate(page))
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SetPageUptodate(page);
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f2fs_put_page(ipage, 1);
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unlock_page(page);
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return 0;
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}
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int f2fs_convert_inline_page(struct dnode_of_data *dn, struct page *page)
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{
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struct f2fs_io_info fio = {
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.sbi = F2FS_I_SB(dn->inode),
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.type = DATA,
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.op = REQ_OP_WRITE,
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.op_flags = WRITE_SYNC | REQ_PRIO,
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.page = page,
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.encrypted_page = NULL,
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};
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int dirty, err;
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if (!f2fs_exist_data(dn->inode))
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goto clear_out;
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err = f2fs_reserve_block(dn, 0);
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if (err)
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return err;
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f2fs_bug_on(F2FS_P_SB(page), PageWriteback(page));
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read_inline_data(page, dn->inode_page);
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set_page_dirty(page);
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/* clear dirty state */
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dirty = clear_page_dirty_for_io(page);
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/* write data page to try to make data consistent */
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set_page_writeback(page);
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fio.old_blkaddr = dn->data_blkaddr;
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write_data_page(dn, &fio);
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f2fs_wait_on_page_writeback(page, DATA, true);
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if (dirty)
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inode_dec_dirty_pages(dn->inode);
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/* this converted inline_data should be recovered. */
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set_inode_flag(dn->inode, FI_APPEND_WRITE);
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/* clear inline data and flag after data writeback */
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truncate_inline_inode(dn->inode_page, 0);
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clear_inline_node(dn->inode_page);
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clear_out:
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stat_dec_inline_inode(dn->inode);
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f2fs_clear_inline_inode(dn->inode);
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f2fs_put_dnode(dn);
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return 0;
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}
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int f2fs_convert_inline_inode(struct inode *inode)
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{
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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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struct page *ipage, *page;
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int err = 0;
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if (!f2fs_has_inline_data(inode))
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return 0;
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page = f2fs_grab_cache_page(inode->i_mapping, 0, false);
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if (!page)
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return -ENOMEM;
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f2fs_lock_op(sbi);
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ipage = get_node_page(sbi, inode->i_ino);
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if (IS_ERR(ipage)) {
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err = PTR_ERR(ipage);
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goto out;
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}
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set_new_dnode(&dn, inode, ipage, ipage, 0);
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if (f2fs_has_inline_data(inode))
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err = f2fs_convert_inline_page(&dn, page);
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f2fs_put_dnode(&dn);
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out:
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f2fs_unlock_op(sbi);
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f2fs_put_page(page, 1);
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f2fs_balance_fs(sbi, dn.node_changed);
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return err;
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}
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int f2fs_write_inline_data(struct inode *inode, struct page *page)
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{
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void *src_addr, *dst_addr;
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struct dnode_of_data dn;
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int err;
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set_new_dnode(&dn, inode, NULL, NULL, 0);
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err = get_dnode_of_data(&dn, 0, LOOKUP_NODE);
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if (err)
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return err;
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if (!f2fs_has_inline_data(inode)) {
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f2fs_put_dnode(&dn);
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return -EAGAIN;
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}
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f2fs_bug_on(F2FS_I_SB(inode), page->index);
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f2fs_wait_on_page_writeback(dn.inode_page, NODE, true);
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src_addr = kmap_atomic(page);
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dst_addr = inline_data_addr(dn.inode_page);
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memcpy(dst_addr, src_addr, MAX_INLINE_DATA);
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kunmap_atomic(src_addr);
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set_page_dirty(dn.inode_page);
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set_inode_flag(inode, FI_APPEND_WRITE);
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set_inode_flag(inode, FI_DATA_EXIST);
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clear_inline_node(dn.inode_page);
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f2fs_put_dnode(&dn);
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return 0;
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}
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bool recover_inline_data(struct inode *inode, struct page *npage)
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{
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struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
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struct f2fs_inode *ri = NULL;
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void *src_addr, *dst_addr;
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struct page *ipage;
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/*
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* The inline_data recovery policy is as follows.
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* [prev.] [next] of inline_data flag
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* o o -> recover inline_data
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* o x -> remove inline_data, and then recover data blocks
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* x o -> remove inline_data, and then recover inline_data
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* x x -> recover data blocks
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*/
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if (IS_INODE(npage))
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ri = F2FS_INODE(npage);
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if (f2fs_has_inline_data(inode) &&
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ri && (ri->i_inline & F2FS_INLINE_DATA)) {
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process_inline:
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ipage = get_node_page(sbi, inode->i_ino);
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f2fs_bug_on(sbi, IS_ERR(ipage));
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f2fs_wait_on_page_writeback(ipage, NODE, true);
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src_addr = inline_data_addr(npage);
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dst_addr = inline_data_addr(ipage);
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memcpy(dst_addr, src_addr, MAX_INLINE_DATA);
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set_inode_flag(inode, FI_INLINE_DATA);
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set_inode_flag(inode, FI_DATA_EXIST);
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set_page_dirty(ipage);
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f2fs_put_page(ipage, 1);
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return true;
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}
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if (f2fs_has_inline_data(inode)) {
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ipage = get_node_page(sbi, inode->i_ino);
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f2fs_bug_on(sbi, IS_ERR(ipage));
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if (!truncate_inline_inode(ipage, 0))
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return false;
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f2fs_clear_inline_inode(inode);
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f2fs_put_page(ipage, 1);
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} else if (ri && (ri->i_inline & F2FS_INLINE_DATA)) {
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if (truncate_blocks(inode, 0, false))
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return false;
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goto process_inline;
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}
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return false;
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}
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struct f2fs_dir_entry *find_in_inline_dir(struct inode *dir,
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struct fscrypt_name *fname, struct page **res_page)
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{
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struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb);
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struct f2fs_inline_dentry *inline_dentry;
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struct qstr name = FSTR_TO_QSTR(&fname->disk_name);
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struct f2fs_dir_entry *de;
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struct f2fs_dentry_ptr d;
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struct page *ipage;
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f2fs_hash_t namehash;
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ipage = get_node_page(sbi, dir->i_ino);
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if (IS_ERR(ipage)) {
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*res_page = ipage;
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return NULL;
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}
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namehash = f2fs_dentry_hash(&name);
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inline_dentry = inline_data_addr(ipage);
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make_dentry_ptr(NULL, &d, (void *)inline_dentry, 2);
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de = find_target_dentry(fname, namehash, NULL, &d);
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unlock_page(ipage);
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if (de)
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*res_page = ipage;
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else
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f2fs_put_page(ipage, 0);
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return de;
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}
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int make_empty_inline_dir(struct inode *inode, struct inode *parent,
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struct page *ipage)
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{
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struct f2fs_inline_dentry *dentry_blk;
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struct f2fs_dentry_ptr d;
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dentry_blk = inline_data_addr(ipage);
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make_dentry_ptr(NULL, &d, (void *)dentry_blk, 2);
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do_make_empty_dir(inode, parent, &d);
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set_page_dirty(ipage);
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/* update i_size to MAX_INLINE_DATA */
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if (i_size_read(inode) < MAX_INLINE_DATA)
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f2fs_i_size_write(inode, MAX_INLINE_DATA);
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return 0;
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}
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/*
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* NOTE: ipage is grabbed by caller, but if any error occurs, we should
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* release ipage in this function.
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*/
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static int f2fs_move_inline_dirents(struct inode *dir, struct page *ipage,
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struct f2fs_inline_dentry *inline_dentry)
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{
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struct page *page;
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struct dnode_of_data dn;
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struct f2fs_dentry_block *dentry_blk;
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int err;
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page = f2fs_grab_cache_page(dir->i_mapping, 0, false);
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if (!page) {
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f2fs_put_page(ipage, 1);
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return -ENOMEM;
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}
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set_new_dnode(&dn, dir, ipage, NULL, 0);
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err = f2fs_reserve_block(&dn, 0);
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if (err)
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goto out;
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f2fs_wait_on_page_writeback(page, DATA, true);
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zero_user_segment(page, MAX_INLINE_DATA, PAGE_SIZE);
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dentry_blk = kmap_atomic(page);
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/* copy data from inline dentry block to new dentry block */
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memcpy(dentry_blk->dentry_bitmap, inline_dentry->dentry_bitmap,
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INLINE_DENTRY_BITMAP_SIZE);
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memset(dentry_blk->dentry_bitmap + INLINE_DENTRY_BITMAP_SIZE, 0,
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SIZE_OF_DENTRY_BITMAP - INLINE_DENTRY_BITMAP_SIZE);
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/*
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* we do not need to zero out remainder part of dentry and filename
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* field, since we have used bitmap for marking the usage status of
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* them, besides, we can also ignore copying/zeroing reserved space
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* of dentry block, because them haven't been used so far.
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*/
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memcpy(dentry_blk->dentry, inline_dentry->dentry,
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sizeof(struct f2fs_dir_entry) * NR_INLINE_DENTRY);
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memcpy(dentry_blk->filename, inline_dentry->filename,
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NR_INLINE_DENTRY * F2FS_SLOT_LEN);
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kunmap_atomic(dentry_blk);
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if (!PageUptodate(page))
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SetPageUptodate(page);
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set_page_dirty(page);
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/* clear inline dir and flag after data writeback */
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truncate_inline_inode(ipage, 0);
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stat_dec_inline_dir(dir);
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clear_inode_flag(dir, FI_INLINE_DENTRY);
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f2fs_i_depth_write(dir, 1);
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if (i_size_read(dir) < PAGE_SIZE)
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f2fs_i_size_write(dir, PAGE_SIZE);
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out:
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f2fs_put_page(page, 1);
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return err;
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}
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static int f2fs_add_inline_entries(struct inode *dir,
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struct f2fs_inline_dentry *inline_dentry)
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{
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struct f2fs_dentry_ptr d;
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unsigned long bit_pos = 0;
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int err = 0;
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make_dentry_ptr(NULL, &d, (void *)inline_dentry, 2);
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while (bit_pos < d.max) {
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struct f2fs_dir_entry *de;
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struct qstr new_name;
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nid_t ino;
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umode_t fake_mode;
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if (!test_bit_le(bit_pos, d.bitmap)) {
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bit_pos++;
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continue;
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}
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de = &d.dentry[bit_pos];
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if (unlikely(!de->name_len)) {
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bit_pos++;
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continue;
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}
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new_name.name = d.filename[bit_pos];
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new_name.len = de->name_len;
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ino = le32_to_cpu(de->ino);
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fake_mode = get_de_type(de) << S_SHIFT;
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err = f2fs_add_regular_entry(dir, &new_name, NULL, NULL,
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ino, fake_mode);
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if (err)
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goto punch_dentry_pages;
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bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len));
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}
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return 0;
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punch_dentry_pages:
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truncate_inode_pages(&dir->i_data, 0);
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truncate_blocks(dir, 0, false);
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remove_dirty_inode(dir);
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return err;
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}
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static int f2fs_move_rehashed_dirents(struct inode *dir, struct page *ipage,
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struct f2fs_inline_dentry *inline_dentry)
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{
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struct f2fs_inline_dentry *backup_dentry;
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int err;
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backup_dentry = f2fs_kmalloc(F2FS_I_SB(dir),
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sizeof(struct f2fs_inline_dentry), GFP_F2FS_ZERO);
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if (!backup_dentry) {
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f2fs_put_page(ipage, 1);
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return -ENOMEM;
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}
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memcpy(backup_dentry, inline_dentry, MAX_INLINE_DATA);
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truncate_inline_inode(ipage, 0);
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unlock_page(ipage);
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err = f2fs_add_inline_entries(dir, backup_dentry);
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if (err)
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goto recover;
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lock_page(ipage);
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stat_dec_inline_dir(dir);
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clear_inode_flag(dir, FI_INLINE_DENTRY);
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kfree(backup_dentry);
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return 0;
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recover:
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lock_page(ipage);
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memcpy(inline_dentry, backup_dentry, MAX_INLINE_DATA);
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f2fs_i_depth_write(dir, 0);
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f2fs_i_size_write(dir, MAX_INLINE_DATA);
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set_page_dirty(ipage);
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f2fs_put_page(ipage, 1);
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kfree(backup_dentry);
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return err;
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}
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static int f2fs_convert_inline_dir(struct inode *dir, struct page *ipage,
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struct f2fs_inline_dentry *inline_dentry)
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{
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if (!F2FS_I(dir)->i_dir_level)
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return f2fs_move_inline_dirents(dir, ipage, inline_dentry);
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else
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return f2fs_move_rehashed_dirents(dir, ipage, inline_dentry);
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}
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int f2fs_add_inline_entry(struct inode *dir, const struct qstr *new_name,
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const struct qstr *orig_name,
|
|
struct inode *inode, nid_t ino, umode_t mode)
|
|
{
|
|
struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
|
|
struct page *ipage;
|
|
unsigned int bit_pos;
|
|
f2fs_hash_t name_hash;
|
|
struct f2fs_inline_dentry *dentry_blk = NULL;
|
|
struct f2fs_dentry_ptr d;
|
|
int slots = GET_DENTRY_SLOTS(new_name->len);
|
|
struct page *page = NULL;
|
|
int err = 0;
|
|
|
|
ipage = get_node_page(sbi, dir->i_ino);
|
|
if (IS_ERR(ipage))
|
|
return PTR_ERR(ipage);
|
|
|
|
dentry_blk = inline_data_addr(ipage);
|
|
bit_pos = room_for_filename(&dentry_blk->dentry_bitmap,
|
|
slots, NR_INLINE_DENTRY);
|
|
if (bit_pos >= NR_INLINE_DENTRY) {
|
|
err = f2fs_convert_inline_dir(dir, ipage, dentry_blk);
|
|
if (err)
|
|
return err;
|
|
err = -EAGAIN;
|
|
goto out;
|
|
}
|
|
|
|
if (inode) {
|
|
down_write(&F2FS_I(inode)->i_sem);
|
|
page = init_inode_metadata(inode, dir, new_name,
|
|
orig_name, ipage);
|
|
if (IS_ERR(page)) {
|
|
err = PTR_ERR(page);
|
|
goto fail;
|
|
}
|
|
if (f2fs_encrypted_inode(dir))
|
|
file_set_enc_name(inode);
|
|
}
|
|
|
|
f2fs_wait_on_page_writeback(ipage, NODE, true);
|
|
|
|
name_hash = f2fs_dentry_hash(new_name);
|
|
make_dentry_ptr(NULL, &d, (void *)dentry_blk, 2);
|
|
f2fs_update_dentry(ino, mode, &d, new_name, name_hash, bit_pos);
|
|
|
|
set_page_dirty(ipage);
|
|
|
|
/* we don't need to mark_inode_dirty now */
|
|
if (inode) {
|
|
f2fs_i_pino_write(inode, dir->i_ino);
|
|
f2fs_put_page(page, 1);
|
|
}
|
|
|
|
update_parent_metadata(dir, inode, 0);
|
|
fail:
|
|
if (inode)
|
|
up_write(&F2FS_I(inode)->i_sem);
|
|
out:
|
|
f2fs_put_page(ipage, 1);
|
|
return err;
|
|
}
|
|
|
|
void f2fs_delete_inline_entry(struct f2fs_dir_entry *dentry, struct page *page,
|
|
struct inode *dir, struct inode *inode)
|
|
{
|
|
struct f2fs_inline_dentry *inline_dentry;
|
|
int slots = GET_DENTRY_SLOTS(le16_to_cpu(dentry->name_len));
|
|
unsigned int bit_pos;
|
|
int i;
|
|
|
|
lock_page(page);
|
|
f2fs_wait_on_page_writeback(page, NODE, true);
|
|
|
|
inline_dentry = inline_data_addr(page);
|
|
bit_pos = dentry - inline_dentry->dentry;
|
|
for (i = 0; i < slots; i++)
|
|
__clear_bit_le(bit_pos + i,
|
|
&inline_dentry->dentry_bitmap);
|
|
|
|
set_page_dirty(page);
|
|
f2fs_put_page(page, 1);
|
|
|
|
dir->i_ctime = dir->i_mtime = current_time(dir);
|
|
f2fs_mark_inode_dirty_sync(dir);
|
|
|
|
if (inode)
|
|
f2fs_drop_nlink(dir, inode);
|
|
}
|
|
|
|
bool f2fs_empty_inline_dir(struct inode *dir)
|
|
{
|
|
struct f2fs_sb_info *sbi = F2FS_I_SB(dir);
|
|
struct page *ipage;
|
|
unsigned int bit_pos = 2;
|
|
struct f2fs_inline_dentry *dentry_blk;
|
|
|
|
ipage = get_node_page(sbi, dir->i_ino);
|
|
if (IS_ERR(ipage))
|
|
return false;
|
|
|
|
dentry_blk = inline_data_addr(ipage);
|
|
bit_pos = find_next_bit_le(&dentry_blk->dentry_bitmap,
|
|
NR_INLINE_DENTRY,
|
|
bit_pos);
|
|
|
|
f2fs_put_page(ipage, 1);
|
|
|
|
if (bit_pos < NR_INLINE_DENTRY)
|
|
return false;
|
|
|
|
return true;
|
|
}
|
|
|
|
int f2fs_read_inline_dir(struct file *file, struct dir_context *ctx,
|
|
struct fscrypt_str *fstr)
|
|
{
|
|
struct inode *inode = file_inode(file);
|
|
struct f2fs_inline_dentry *inline_dentry = NULL;
|
|
struct page *ipage = NULL;
|
|
struct f2fs_dentry_ptr d;
|
|
|
|
if (ctx->pos == NR_INLINE_DENTRY)
|
|
return 0;
|
|
|
|
ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino);
|
|
if (IS_ERR(ipage))
|
|
return PTR_ERR(ipage);
|
|
|
|
inline_dentry = inline_data_addr(ipage);
|
|
|
|
make_dentry_ptr(inode, &d, (void *)inline_dentry, 2);
|
|
|
|
if (!f2fs_fill_dentries(ctx, &d, 0, fstr))
|
|
ctx->pos = NR_INLINE_DENTRY;
|
|
|
|
f2fs_put_page(ipage, 1);
|
|
return 0;
|
|
}
|
|
|
|
int f2fs_inline_data_fiemap(struct inode *inode,
|
|
struct fiemap_extent_info *fieinfo, __u64 start, __u64 len)
|
|
{
|
|
__u64 byteaddr, ilen;
|
|
__u32 flags = FIEMAP_EXTENT_DATA_INLINE | FIEMAP_EXTENT_NOT_ALIGNED |
|
|
FIEMAP_EXTENT_LAST;
|
|
struct node_info ni;
|
|
struct page *ipage;
|
|
int err = 0;
|
|
|
|
ipage = get_node_page(F2FS_I_SB(inode), inode->i_ino);
|
|
if (IS_ERR(ipage))
|
|
return PTR_ERR(ipage);
|
|
|
|
if (!f2fs_has_inline_data(inode)) {
|
|
err = -EAGAIN;
|
|
goto out;
|
|
}
|
|
|
|
ilen = min_t(size_t, MAX_INLINE_DATA, i_size_read(inode));
|
|
if (start >= ilen)
|
|
goto out;
|
|
if (start + len < ilen)
|
|
ilen = start + len;
|
|
ilen -= start;
|
|
|
|
get_node_info(F2FS_I_SB(inode), inode->i_ino, &ni);
|
|
byteaddr = (__u64)ni.blk_addr << inode->i_sb->s_blocksize_bits;
|
|
byteaddr += (char *)inline_data_addr(ipage) - (char *)F2FS_INODE(ipage);
|
|
err = fiemap_fill_next_extent(fieinfo, start, byteaddr, ilen, flags);
|
|
out:
|
|
f2fs_put_page(ipage, 1);
|
|
return err;
|
|
}
|