267 lines
7.0 KiB
C
267 lines
7.0 KiB
C
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/**
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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 "f2fs.h"
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#include "node.h"
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struct f2fs_iget_args {
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u64 ino;
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int on_free;
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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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inode->i_flags &= ~(S_SYNC | S_APPEND | S_IMMUTABLE |
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S_NOATIME | S_DIRSYNC);
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if (flags & FS_SYNC_FL)
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inode->i_flags |= S_SYNC;
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if (flags & FS_APPEND_FL)
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inode->i_flags |= S_APPEND;
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if (flags & FS_IMMUTABLE_FL)
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inode->i_flags |= S_IMMUTABLE;
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if (flags & FS_NOATIME_FL)
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inode->i_flags |= S_NOATIME;
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if (flags & FS_DIRSYNC_FL)
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inode->i_flags |= S_DIRSYNC;
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}
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static int f2fs_iget_test(struct inode *inode, void *data)
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{
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struct f2fs_iget_args *args = data;
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if (inode->i_ino != args->ino)
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return 0;
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if (inode->i_state & (I_FREEING | I_WILL_FREE)) {
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args->on_free = 1;
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return 0;
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}
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return 1;
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}
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struct inode *f2fs_iget_nowait(struct super_block *sb, unsigned long ino)
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{
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struct f2fs_iget_args args = {
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.ino = ino,
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.on_free = 0
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};
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struct inode *inode = ilookup5(sb, ino, f2fs_iget_test, &args);
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if (inode)
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return inode;
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if (!args.on_free)
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return f2fs_iget(sb, ino);
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return ERR_PTR(-ENOENT);
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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_SB(inode->i_sb);
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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_node *rn;
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struct f2fs_inode *ri;
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/* Check if ino is within scope */
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check_nid_range(sbi, inode->i_ino);
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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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rn = page_address(node_page);
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ri = &(rn->i);
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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->data_version = le64_to_cpu(F2FS_CKPT(sbi)->checkpoint_ver) - 1;
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fi->i_advise = ri->i_advise;
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get_extent_info(&fi->ext, ri->i_ext);
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f2fs_put_page(node_page, 1);
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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;
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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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return inode;
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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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if (!sbi->por_doing && inode->i_nlink == 0) {
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ret = -ENOENT;
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goto bad_inode;
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}
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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_HIGHUSER_MOVABLE |
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__GFP_ZERO);
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} else if (S_ISLNK(inode->i_mode)) {
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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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return inode;
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bad_inode:
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iget_failed(inode);
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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_node *rn;
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struct f2fs_inode *ri;
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wait_on_page_writeback(node_page);
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rn = page_address(node_page);
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ri = &(rn->i);
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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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set_raw_extent(&F2FS_I(inode)->ext, &ri->i_ext);
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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_generation = cpu_to_le32(inode->i_generation);
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set_page_dirty(node_page);
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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_SB(inode->i_sb);
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struct page *node_page;
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bool need_lock = false;
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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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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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if (!PageDirty(node_page)) {
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need_lock = true;
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f2fs_put_page(node_page, 1);
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mutex_lock(&sbi->write_inode);
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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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mutex_unlock(&sbi->write_inode);
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return PTR_ERR(node_page);
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}
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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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if (need_lock)
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mutex_unlock(&sbi->write_inode);
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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_SB(inode->i_sb);
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truncate_inode_pages(&inode->i_data, 0);
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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 no_delete;
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BUG_ON(atomic_read(&F2FS_I(inode)->dirty_dents));
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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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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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remove_inode_page(inode);
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no_delete:
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clear_inode(inode);
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}
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