mirror of https://gitee.com/openkylin/linux.git
395 lines
10 KiB
C
395 lines
10 KiB
C
/*
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* fs/f2fs/inode.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/buffer_head.h>
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#include <linux/writeback.h>
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#include <linux/bitops.h>
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#include "f2fs.h"
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#include "node.h"
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#include <trace/events/f2fs.h>
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void f2fs_set_inode_flags(struct inode *inode)
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{
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unsigned int flags = F2FS_I(inode)->i_flags;
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unsigned int new_fl = 0;
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if (flags & FS_SYNC_FL)
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new_fl |= S_SYNC;
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if (flags & FS_APPEND_FL)
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new_fl |= S_APPEND;
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if (flags & FS_IMMUTABLE_FL)
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new_fl |= S_IMMUTABLE;
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if (flags & FS_NOATIME_FL)
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new_fl |= S_NOATIME;
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if (flags & FS_DIRSYNC_FL)
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new_fl |= S_DIRSYNC;
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set_mask_bits(&inode->i_flags,
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S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC, new_fl);
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}
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static void __get_inode_rdev(struct inode *inode, struct f2fs_inode *ri)
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{
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if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) ||
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S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
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if (ri->i_addr[0])
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inode->i_rdev =
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old_decode_dev(le32_to_cpu(ri->i_addr[0]));
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else
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inode->i_rdev =
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new_decode_dev(le32_to_cpu(ri->i_addr[1]));
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}
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}
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static bool __written_first_block(struct f2fs_inode *ri)
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{
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block_t addr = le32_to_cpu(ri->i_addr[0]);
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if (addr != NEW_ADDR && addr != NULL_ADDR)
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return true;
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return false;
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}
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static void __set_inode_rdev(struct inode *inode, struct f2fs_inode *ri)
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{
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if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
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if (old_valid_dev(inode->i_rdev)) {
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ri->i_addr[0] =
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cpu_to_le32(old_encode_dev(inode->i_rdev));
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ri->i_addr[1] = 0;
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} else {
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ri->i_addr[0] = 0;
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ri->i_addr[1] =
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cpu_to_le32(new_encode_dev(inode->i_rdev));
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ri->i_addr[2] = 0;
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}
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}
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}
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static void __recover_inline_status(struct inode *inode, struct page *ipage)
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{
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void *inline_data = inline_data_addr(ipage);
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__le32 *start = inline_data;
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__le32 *end = start + MAX_INLINE_DATA / sizeof(__le32);
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while (start < end) {
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if (*start++) {
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f2fs_wait_on_page_writeback(ipage, NODE);
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set_inode_flag(F2FS_I(inode), FI_DATA_EXIST);
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set_raw_inline(F2FS_I(inode), F2FS_INODE(ipage));
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set_page_dirty(ipage);
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return;
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}
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}
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return;
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}
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static int do_read_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 f2fs_inode_info *fi = F2FS_I(inode);
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struct page *node_page;
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struct f2fs_inode *ri;
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/* Check if ino is within scope */
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if (check_nid_range(sbi, inode->i_ino)) {
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f2fs_msg(inode->i_sb, KERN_ERR, "bad inode number: %lu",
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(unsigned long) inode->i_ino);
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WARN_ON(1);
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return -EINVAL;
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}
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node_page = get_node_page(sbi, inode->i_ino);
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if (IS_ERR(node_page))
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return PTR_ERR(node_page);
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ri = F2FS_INODE(node_page);
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inode->i_mode = le16_to_cpu(ri->i_mode);
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i_uid_write(inode, le32_to_cpu(ri->i_uid));
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i_gid_write(inode, le32_to_cpu(ri->i_gid));
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set_nlink(inode, le32_to_cpu(ri->i_links));
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inode->i_size = le64_to_cpu(ri->i_size);
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inode->i_blocks = le64_to_cpu(ri->i_blocks);
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inode->i_atime.tv_sec = le64_to_cpu(ri->i_atime);
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inode->i_ctime.tv_sec = le64_to_cpu(ri->i_ctime);
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inode->i_mtime.tv_sec = le64_to_cpu(ri->i_mtime);
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inode->i_atime.tv_nsec = le32_to_cpu(ri->i_atime_nsec);
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inode->i_ctime.tv_nsec = le32_to_cpu(ri->i_ctime_nsec);
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inode->i_mtime.tv_nsec = le32_to_cpu(ri->i_mtime_nsec);
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inode->i_generation = le32_to_cpu(ri->i_generation);
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fi->i_current_depth = le32_to_cpu(ri->i_current_depth);
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fi->i_xattr_nid = le32_to_cpu(ri->i_xattr_nid);
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fi->i_flags = le32_to_cpu(ri->i_flags);
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fi->flags = 0;
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fi->i_advise = ri->i_advise;
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fi->i_pino = le32_to_cpu(ri->i_pino);
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fi->i_dir_level = ri->i_dir_level;
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f2fs_init_extent_cache(inode, &ri->i_ext);
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get_inline_info(fi, ri);
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/* check data exist */
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if (f2fs_has_inline_data(inode) && !f2fs_exist_data(inode))
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__recover_inline_status(inode, node_page);
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/* get rdev by using inline_info */
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__get_inode_rdev(inode, ri);
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if (__written_first_block(ri))
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set_inode_flag(F2FS_I(inode), FI_FIRST_BLOCK_WRITTEN);
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f2fs_put_page(node_page, 1);
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stat_inc_inline_inode(inode);
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stat_inc_inline_dir(inode);
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return 0;
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}
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struct inode *f2fs_iget(struct super_block *sb, unsigned long ino)
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{
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struct f2fs_sb_info *sbi = F2FS_SB(sb);
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struct inode *inode;
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int ret = 0;
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inode = iget_locked(sb, ino);
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if (!inode)
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return ERR_PTR(-ENOMEM);
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if (!(inode->i_state & I_NEW)) {
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trace_f2fs_iget(inode);
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return inode;
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}
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if (ino == F2FS_NODE_INO(sbi) || ino == F2FS_META_INO(sbi))
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goto make_now;
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ret = do_read_inode(inode);
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if (ret)
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goto bad_inode;
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make_now:
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if (ino == F2FS_NODE_INO(sbi)) {
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inode->i_mapping->a_ops = &f2fs_node_aops;
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mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
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} else if (ino == F2FS_META_INO(sbi)) {
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inode->i_mapping->a_ops = &f2fs_meta_aops;
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mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO);
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} else if (S_ISREG(inode->i_mode)) {
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inode->i_op = &f2fs_file_inode_operations;
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inode->i_fop = &f2fs_file_operations;
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inode->i_mapping->a_ops = &f2fs_dblock_aops;
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} else if (S_ISDIR(inode->i_mode)) {
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inode->i_op = &f2fs_dir_inode_operations;
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inode->i_fop = &f2fs_dir_operations;
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inode->i_mapping->a_ops = &f2fs_dblock_aops;
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mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO);
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} else if (S_ISLNK(inode->i_mode)) {
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if (f2fs_encrypted_inode(inode))
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inode->i_op = &f2fs_encrypted_symlink_inode_operations;
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else
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inode->i_op = &f2fs_symlink_inode_operations;
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inode->i_mapping->a_ops = &f2fs_dblock_aops;
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} else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) ||
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S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) {
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inode->i_op = &f2fs_special_inode_operations;
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init_special_inode(inode, inode->i_mode, inode->i_rdev);
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} else {
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ret = -EIO;
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goto bad_inode;
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}
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unlock_new_inode(inode);
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trace_f2fs_iget(inode);
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return inode;
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bad_inode:
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iget_failed(inode);
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trace_f2fs_iget_exit(inode, ret);
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return ERR_PTR(ret);
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}
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void update_inode(struct inode *inode, struct page *node_page)
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{
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struct f2fs_inode *ri;
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f2fs_wait_on_page_writeback(node_page, NODE);
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ri = F2FS_INODE(node_page);
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ri->i_mode = cpu_to_le16(inode->i_mode);
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ri->i_advise = F2FS_I(inode)->i_advise;
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ri->i_uid = cpu_to_le32(i_uid_read(inode));
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ri->i_gid = cpu_to_le32(i_gid_read(inode));
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ri->i_links = cpu_to_le32(inode->i_nlink);
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ri->i_size = cpu_to_le64(i_size_read(inode));
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ri->i_blocks = cpu_to_le64(inode->i_blocks);
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read_lock(&F2FS_I(inode)->ext_lock);
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set_raw_extent(&F2FS_I(inode)->ext, &ri->i_ext);
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read_unlock(&F2FS_I(inode)->ext_lock);
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set_raw_inline(F2FS_I(inode), ri);
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ri->i_atime = cpu_to_le64(inode->i_atime.tv_sec);
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ri->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec);
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ri->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec);
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ri->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec);
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ri->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec);
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ri->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec);
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ri->i_current_depth = cpu_to_le32(F2FS_I(inode)->i_current_depth);
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ri->i_xattr_nid = cpu_to_le32(F2FS_I(inode)->i_xattr_nid);
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ri->i_flags = cpu_to_le32(F2FS_I(inode)->i_flags);
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ri->i_pino = cpu_to_le32(F2FS_I(inode)->i_pino);
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ri->i_generation = cpu_to_le32(inode->i_generation);
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ri->i_dir_level = F2FS_I(inode)->i_dir_level;
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__set_inode_rdev(inode, ri);
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set_cold_node(inode, node_page);
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set_page_dirty(node_page);
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clear_inode_flag(F2FS_I(inode), FI_DIRTY_INODE);
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}
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void update_inode_page(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 page *node_page;
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retry:
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node_page = get_node_page(sbi, inode->i_ino);
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if (IS_ERR(node_page)) {
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int err = PTR_ERR(node_page);
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if (err == -ENOMEM) {
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cond_resched();
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goto retry;
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} else if (err != -ENOENT) {
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f2fs_stop_checkpoint(sbi);
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}
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return;
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}
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update_inode(inode, node_page);
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f2fs_put_page(node_page, 1);
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}
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int f2fs_write_inode(struct inode *inode, struct writeback_control *wbc)
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{
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struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
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if (inode->i_ino == F2FS_NODE_INO(sbi) ||
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inode->i_ino == F2FS_META_INO(sbi))
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return 0;
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if (!is_inode_flag_set(F2FS_I(inode), FI_DIRTY_INODE))
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return 0;
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/*
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* We need to lock here to prevent from producing dirty node pages
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* during the urgent cleaning time when runing out of free sections.
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*/
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f2fs_lock_op(sbi);
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update_inode_page(inode);
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f2fs_unlock_op(sbi);
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if (wbc)
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f2fs_balance_fs(sbi);
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return 0;
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}
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/*
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* Called at the last iput() if i_nlink is zero
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*/
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void f2fs_evict_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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nid_t xnid = F2FS_I(inode)->i_xattr_nid;
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/* some remained atomic pages should discarded */
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if (f2fs_is_atomic_file(inode))
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commit_inmem_pages(inode, true);
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trace_f2fs_evict_inode(inode);
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truncate_inode_pages_final(&inode->i_data);
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if (inode->i_ino == F2FS_NODE_INO(sbi) ||
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inode->i_ino == F2FS_META_INO(sbi))
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goto out_clear;
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f2fs_bug_on(sbi, get_dirty_pages(inode));
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remove_dirty_dir_inode(inode);
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if (inode->i_nlink || is_bad_inode(inode))
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goto no_delete;
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sb_start_intwrite(inode->i_sb);
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set_inode_flag(F2FS_I(inode), FI_NO_ALLOC);
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i_size_write(inode, 0);
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if (F2FS_HAS_BLOCKS(inode))
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f2fs_truncate(inode);
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f2fs_lock_op(sbi);
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remove_inode_page(inode);
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f2fs_unlock_op(sbi);
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sb_end_intwrite(inode->i_sb);
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no_delete:
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stat_dec_inline_dir(inode);
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stat_dec_inline_inode(inode);
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/* update extent info in inode */
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if (inode->i_nlink)
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f2fs_preserve_extent_tree(inode);
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f2fs_destroy_extent_tree(inode);
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invalidate_mapping_pages(NODE_MAPPING(sbi), inode->i_ino, inode->i_ino);
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if (xnid)
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invalidate_mapping_pages(NODE_MAPPING(sbi), xnid, xnid);
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if (is_inode_flag_set(F2FS_I(inode), FI_APPEND_WRITE))
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add_dirty_inode(sbi, inode->i_ino, APPEND_INO);
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if (is_inode_flag_set(F2FS_I(inode), FI_UPDATE_WRITE))
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add_dirty_inode(sbi, inode->i_ino, UPDATE_INO);
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out_clear:
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#ifdef CONFIG_F2FS_FS_ENCRYPTION
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if (F2FS_I(inode)->i_crypt_info)
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f2fs_free_encryption_info(inode, F2FS_I(inode)->i_crypt_info);
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#endif
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clear_inode(inode);
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}
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/* caller should call f2fs_lock_op() */
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void handle_failed_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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clear_nlink(inode);
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make_bad_inode(inode);
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unlock_new_inode(inode);
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i_size_write(inode, 0);
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if (F2FS_HAS_BLOCKS(inode))
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f2fs_truncate(inode);
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remove_inode_page(inode);
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clear_inode_flag(F2FS_I(inode), FI_INLINE_DATA);
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clear_inode_flag(F2FS_I(inode), FI_INLINE_DENTRY);
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alloc_nid_failed(sbi, inode->i_ino);
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f2fs_unlock_op(sbi);
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/* iput will drop the inode object */
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iput(inode);
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}
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