624 строки
16 KiB
C
624 строки
16 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/backing-dev.h>
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#include <linux/writeback.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 <trace/events/f2fs.h>
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void f2fs_mark_inode_dirty_sync(struct inode *inode, bool sync)
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{
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if (f2fs_inode_dirtied(inode, sync))
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return;
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mark_inode_dirty_sync(inode);
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}
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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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if (f2fs_encrypted_inode(inode))
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new_fl |= S_ENCRYPTED;
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inode_set_flags(inode, new_fl,
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S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC|
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S_ENCRYPTED);
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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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int extra_size = get_extra_isize(inode);
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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[extra_size])
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inode->i_rdev = old_decode_dev(
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le32_to_cpu(ri->i_addr[extra_size]));
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else
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inode->i_rdev = new_decode_dev(
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le32_to_cpu(ri->i_addr[extra_size + 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[offset_in_addr(ri)]);
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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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int extra_size = get_extra_isize(inode);
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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[extra_size] =
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cpu_to_le32(old_encode_dev(inode->i_rdev));
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ri->i_addr[extra_size + 1] = 0;
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} else {
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ri->i_addr[extra_size] = 0;
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ri->i_addr[extra_size + 1] =
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cpu_to_le32(new_encode_dev(inode->i_rdev));
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ri->i_addr[extra_size + 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(inode, ipage);
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__le32 *start = inline_data;
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__le32 *end = start + MAX_INLINE_DATA(inode) / 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, true);
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set_inode_flag(inode, FI_DATA_EXIST);
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set_raw_inline(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 bool f2fs_enable_inode_chksum(struct f2fs_sb_info *sbi, struct page *page)
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{
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struct f2fs_inode *ri = &F2FS_NODE(page)->i;
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int extra_isize = le32_to_cpu(ri->i_extra_isize);
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if (!f2fs_sb_has_inode_chksum(sbi->sb))
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return false;
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if (!RAW_IS_INODE(F2FS_NODE(page)) || !(ri->i_inline & F2FS_EXTRA_ATTR))
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return false;
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if (!F2FS_FITS_IN_INODE(ri, extra_isize, i_inode_checksum))
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return false;
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return true;
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}
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static __u32 f2fs_inode_chksum(struct f2fs_sb_info *sbi, struct page *page)
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{
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struct f2fs_node *node = F2FS_NODE(page);
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struct f2fs_inode *ri = &node->i;
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__le32 ino = node->footer.ino;
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__le32 gen = ri->i_generation;
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__u32 chksum, chksum_seed;
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__u32 dummy_cs = 0;
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unsigned int offset = offsetof(struct f2fs_inode, i_inode_checksum);
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unsigned int cs_size = sizeof(dummy_cs);
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chksum = f2fs_chksum(sbi, sbi->s_chksum_seed, (__u8 *)&ino,
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sizeof(ino));
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chksum_seed = f2fs_chksum(sbi, chksum, (__u8 *)&gen, sizeof(gen));
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chksum = f2fs_chksum(sbi, chksum_seed, (__u8 *)ri, offset);
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chksum = f2fs_chksum(sbi, chksum, (__u8 *)&dummy_cs, cs_size);
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offset += cs_size;
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chksum = f2fs_chksum(sbi, chksum, (__u8 *)ri + offset,
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F2FS_BLKSIZE - offset);
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return chksum;
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}
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bool f2fs_inode_chksum_verify(struct f2fs_sb_info *sbi, struct page *page)
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{
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struct f2fs_inode *ri;
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__u32 provided, calculated;
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if (!f2fs_enable_inode_chksum(sbi, page) ||
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PageDirty(page) || PageWriteback(page))
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return true;
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ri = &F2FS_NODE(page)->i;
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provided = le32_to_cpu(ri->i_inode_checksum);
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calculated = f2fs_inode_chksum(sbi, page);
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if (provided != calculated)
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f2fs_msg(sbi->sb, KERN_WARNING,
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"checksum invalid, ino = %x, %x vs. %x",
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ino_of_node(page), provided, calculated);
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return provided == calculated;
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}
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void f2fs_inode_chksum_set(struct f2fs_sb_info *sbi, struct page *page)
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{
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struct f2fs_inode *ri = &F2FS_NODE(page)->i;
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if (!f2fs_enable_inode_chksum(sbi, page))
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return;
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ri->i_inode_checksum = cpu_to_le32(f2fs_inode_chksum(sbi, page));
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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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projid_t i_projid;
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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 = SECTOR_FROM_BLOCK(le64_to_cpu(ri->i_blocks) - 1);
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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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if (f2fs_init_extent_tree(inode, &ri->i_ext))
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set_page_dirty(node_page);
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get_inline_info(inode, ri);
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fi->i_extra_isize = f2fs_has_extra_attr(inode) ?
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le16_to_cpu(ri->i_extra_isize) : 0;
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if (f2fs_sb_has_flexible_inline_xattr(sbi->sb)) {
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f2fs_bug_on(sbi, !f2fs_has_extra_attr(inode));
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fi->i_inline_xattr_size = le16_to_cpu(ri->i_inline_xattr_size);
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} else if (f2fs_has_inline_xattr(inode) ||
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f2fs_has_inline_dentry(inode)) {
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fi->i_inline_xattr_size = DEFAULT_INLINE_XATTR_ADDRS;
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} else {
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/*
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* Previous inline data or directory always reserved 200 bytes
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* in inode layout, even if inline_xattr is disabled. In order
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* to keep inline_dentry's structure for backward compatibility,
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* we get the space back only from inline_data.
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*/
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fi->i_inline_xattr_size = 0;
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}
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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(inode, FI_FIRST_BLOCK_WRITTEN);
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if (!need_inode_block_update(sbi, inode->i_ino))
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fi->last_disk_size = inode->i_size;
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if (fi->i_flags & FS_PROJINHERIT_FL)
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set_inode_flag(inode, FI_PROJ_INHERIT);
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if (f2fs_has_extra_attr(inode) && f2fs_sb_has_project_quota(sbi->sb) &&
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F2FS_FITS_IN_INODE(ri, fi->i_extra_isize, i_projid))
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i_projid = (projid_t)le32_to_cpu(ri->i_projid);
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else
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i_projid = F2FS_DEF_PROJID;
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fi->i_projid = make_kprojid(&init_user_ns, i_projid);
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f2fs_put_page(node_page, 1);
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stat_inc_inline_xattr(inode);
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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_nohighmem(inode);
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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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f2fs_set_inode_flags(inode);
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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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struct inode *f2fs_iget_retry(struct super_block *sb, unsigned long ino)
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{
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struct inode *inode;
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retry:
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inode = f2fs_iget(sb, ino);
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if (IS_ERR(inode)) {
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if (PTR_ERR(inode) == -ENOMEM) {
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congestion_wait(BLK_RW_ASYNC, HZ/50);
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goto retry;
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}
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}
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return inode;
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}
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int 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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struct extent_tree *et = F2FS_I(inode)->extent_tree;
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f2fs_inode_synced(inode);
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f2fs_wait_on_page_writeback(node_page, NODE, true);
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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(SECTOR_TO_BLOCK(inode->i_blocks) + 1);
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if (et) {
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read_lock(&et->lock);
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set_raw_extent(&et->largest, &ri->i_ext);
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read_unlock(&et->lock);
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} else {
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memset(&ri->i_ext, 0, sizeof(ri->i_ext));
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}
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set_raw_inline(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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if (f2fs_has_extra_attr(inode)) {
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ri->i_extra_isize = cpu_to_le16(F2FS_I(inode)->i_extra_isize);
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if (f2fs_sb_has_flexible_inline_xattr(F2FS_I_SB(inode)->sb))
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ri->i_inline_xattr_size =
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cpu_to_le16(F2FS_I(inode)->i_inline_xattr_size);
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if (f2fs_sb_has_project_quota(F2FS_I_SB(inode)->sb) &&
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F2FS_FITS_IN_INODE(ri, F2FS_I(inode)->i_extra_isize,
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i_projid)) {
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projid_t i_projid;
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i_projid = from_kprojid(&init_user_ns,
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F2FS_I(inode)->i_projid);
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ri->i_projid = cpu_to_le32(i_projid);
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}
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}
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__set_inode_rdev(inode, ri);
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set_cold_node(inode, node_page);
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/* deleted inode */
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if (inode->i_nlink == 0)
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clear_inline_node(node_page);
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return set_page_dirty(node_page);
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}
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int update_inode_page(struct inode *inode)
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{
|
|
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
|
|
struct page *node_page;
|
|
int ret = 0;
|
|
retry:
|
|
node_page = get_node_page(sbi, inode->i_ino);
|
|
if (IS_ERR(node_page)) {
|
|
int err = PTR_ERR(node_page);
|
|
if (err == -ENOMEM) {
|
|
cond_resched();
|
|
goto retry;
|
|
} else if (err != -ENOENT) {
|
|
f2fs_stop_checkpoint(sbi, false);
|
|
}
|
|
return 0;
|
|
}
|
|
ret = update_inode(inode, node_page);
|
|
f2fs_put_page(node_page, 1);
|
|
return ret;
|
|
}
|
|
|
|
int f2fs_write_inode(struct inode *inode, struct writeback_control *wbc)
|
|
{
|
|
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
|
|
|
|
if (inode->i_ino == F2FS_NODE_INO(sbi) ||
|
|
inode->i_ino == F2FS_META_INO(sbi))
|
|
return 0;
|
|
|
|
if (!is_inode_flag_set(inode, FI_DIRTY_INODE))
|
|
return 0;
|
|
|
|
/*
|
|
* We need to balance fs here to prevent from producing dirty node pages
|
|
* during the urgent cleaning time when runing out of free sections.
|
|
*/
|
|
update_inode_page(inode);
|
|
if (wbc && wbc->nr_to_write)
|
|
f2fs_balance_fs(sbi, true);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* Called at the last iput() if i_nlink is zero
|
|
*/
|
|
void f2fs_evict_inode(struct inode *inode)
|
|
{
|
|
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
|
|
nid_t xnid = F2FS_I(inode)->i_xattr_nid;
|
|
int err = 0;
|
|
|
|
/* some remained atomic pages should discarded */
|
|
if (f2fs_is_atomic_file(inode))
|
|
drop_inmem_pages(inode);
|
|
|
|
trace_f2fs_evict_inode(inode);
|
|
truncate_inode_pages_final(&inode->i_data);
|
|
|
|
if (inode->i_ino == F2FS_NODE_INO(sbi) ||
|
|
inode->i_ino == F2FS_META_INO(sbi))
|
|
goto out_clear;
|
|
|
|
f2fs_bug_on(sbi, get_dirty_pages(inode));
|
|
remove_dirty_inode(inode);
|
|
|
|
f2fs_destroy_extent_tree(inode);
|
|
|
|
if (inode->i_nlink || is_bad_inode(inode))
|
|
goto no_delete;
|
|
|
|
dquot_initialize(inode);
|
|
|
|
remove_ino_entry(sbi, inode->i_ino, APPEND_INO);
|
|
remove_ino_entry(sbi, inode->i_ino, UPDATE_INO);
|
|
remove_ino_entry(sbi, inode->i_ino, FLUSH_INO);
|
|
|
|
sb_start_intwrite(inode->i_sb);
|
|
set_inode_flag(inode, FI_NO_ALLOC);
|
|
i_size_write(inode, 0);
|
|
retry:
|
|
if (F2FS_HAS_BLOCKS(inode))
|
|
err = f2fs_truncate(inode);
|
|
|
|
#ifdef CONFIG_F2FS_FAULT_INJECTION
|
|
if (time_to_inject(sbi, FAULT_EVICT_INODE)) {
|
|
f2fs_show_injection_info(FAULT_EVICT_INODE);
|
|
err = -EIO;
|
|
}
|
|
#endif
|
|
if (!err) {
|
|
f2fs_lock_op(sbi);
|
|
err = remove_inode_page(inode);
|
|
f2fs_unlock_op(sbi);
|
|
if (err == -ENOENT)
|
|
err = 0;
|
|
}
|
|
|
|
/* give more chances, if ENOMEM case */
|
|
if (err == -ENOMEM) {
|
|
err = 0;
|
|
goto retry;
|
|
}
|
|
|
|
if (err)
|
|
update_inode_page(inode);
|
|
dquot_free_inode(inode);
|
|
sb_end_intwrite(inode->i_sb);
|
|
no_delete:
|
|
dquot_drop(inode);
|
|
|
|
stat_dec_inline_xattr(inode);
|
|
stat_dec_inline_dir(inode);
|
|
stat_dec_inline_inode(inode);
|
|
|
|
if (likely(!is_set_ckpt_flags(sbi, CP_ERROR_FLAG)))
|
|
f2fs_bug_on(sbi, is_inode_flag_set(inode, FI_DIRTY_INODE));
|
|
else
|
|
f2fs_inode_synced(inode);
|
|
|
|
/* ino == 0, if f2fs_new_inode() was failed t*/
|
|
if (inode->i_ino)
|
|
invalidate_mapping_pages(NODE_MAPPING(sbi), inode->i_ino,
|
|
inode->i_ino);
|
|
if (xnid)
|
|
invalidate_mapping_pages(NODE_MAPPING(sbi), xnid, xnid);
|
|
if (inode->i_nlink) {
|
|
if (is_inode_flag_set(inode, FI_APPEND_WRITE))
|
|
add_ino_entry(sbi, inode->i_ino, APPEND_INO);
|
|
if (is_inode_flag_set(inode, FI_UPDATE_WRITE))
|
|
add_ino_entry(sbi, inode->i_ino, UPDATE_INO);
|
|
}
|
|
if (is_inode_flag_set(inode, FI_FREE_NID)) {
|
|
alloc_nid_failed(sbi, inode->i_ino);
|
|
clear_inode_flag(inode, FI_FREE_NID);
|
|
} else {
|
|
f2fs_bug_on(sbi, err &&
|
|
!exist_written_data(sbi, inode->i_ino, ORPHAN_INO));
|
|
}
|
|
out_clear:
|
|
fscrypt_put_encryption_info(inode, NULL);
|
|
clear_inode(inode);
|
|
}
|
|
|
|
/* caller should call f2fs_lock_op() */
|
|
void handle_failed_inode(struct inode *inode)
|
|
{
|
|
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
|
|
struct node_info ni;
|
|
|
|
/*
|
|
* clear nlink of inode in order to release resource of inode
|
|
* immediately.
|
|
*/
|
|
clear_nlink(inode);
|
|
|
|
/*
|
|
* we must call this to avoid inode being remained as dirty, resulting
|
|
* in a panic when flushing dirty inodes in gdirty_list.
|
|
*/
|
|
update_inode_page(inode);
|
|
f2fs_inode_synced(inode);
|
|
|
|
/* don't make bad inode, since it becomes a regular file. */
|
|
unlock_new_inode(inode);
|
|
|
|
/*
|
|
* Note: we should add inode to orphan list before f2fs_unlock_op()
|
|
* so we can prevent losing this orphan when encoutering checkpoint
|
|
* and following suddenly power-off.
|
|
*/
|
|
get_node_info(sbi, inode->i_ino, &ni);
|
|
|
|
if (ni.blk_addr != NULL_ADDR) {
|
|
int err = acquire_orphan_inode(sbi);
|
|
if (err) {
|
|
set_sbi_flag(sbi, SBI_NEED_FSCK);
|
|
f2fs_msg(sbi->sb, KERN_WARNING,
|
|
"Too many orphan inodes, run fsck to fix.");
|
|
} else {
|
|
add_orphan_inode(inode);
|
|
}
|
|
alloc_nid_done(sbi, inode->i_ino);
|
|
} else {
|
|
set_inode_flag(inode, FI_FREE_NID);
|
|
}
|
|
|
|
f2fs_unlock_op(sbi);
|
|
|
|
/* iput will drop the inode object */
|
|
iput(inode);
|
|
}
|