/* * fs/f2fs/inode.c * * Copyright (c) 2012 Samsung Electronics Co., Ltd. * http://www.samsung.com/ * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include <linux/fs.h> #include <linux/f2fs_fs.h> #include <linux/buffer_head.h> #include <linux/writeback.h> #include "f2fs.h" #include "node.h" struct f2fs_iget_args { u64 ino; int on_free; }; void f2fs_set_inode_flags(struct inode *inode) { unsigned int flags = F2FS_I(inode)->i_flags; inode->i_flags &= ~(S_SYNC | S_APPEND | S_IMMUTABLE | S_NOATIME | S_DIRSYNC); if (flags & FS_SYNC_FL) inode->i_flags |= S_SYNC; if (flags & FS_APPEND_FL) inode->i_flags |= S_APPEND; if (flags & FS_IMMUTABLE_FL) inode->i_flags |= S_IMMUTABLE; if (flags & FS_NOATIME_FL) inode->i_flags |= S_NOATIME; if (flags & FS_DIRSYNC_FL) inode->i_flags |= S_DIRSYNC; } static int f2fs_iget_test(struct inode *inode, void *data) { struct f2fs_iget_args *args = data; if (inode->i_ino != args->ino) return 0; if (inode->i_state & (I_FREEING | I_WILL_FREE)) { args->on_free = 1; return 0; } return 1; } struct inode *f2fs_iget_nowait(struct super_block *sb, unsigned long ino) { struct f2fs_iget_args args = { .ino = ino, .on_free = 0 }; struct inode *inode = ilookup5(sb, ino, f2fs_iget_test, &args); if (inode) return inode; if (!args.on_free) return f2fs_iget(sb, ino); return ERR_PTR(-ENOENT); } static int do_read_inode(struct inode *inode) { struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); struct f2fs_inode_info *fi = F2FS_I(inode); struct page *node_page; struct f2fs_node *rn; struct f2fs_inode *ri; /* Check if ino is within scope */ check_nid_range(sbi, inode->i_ino); node_page = get_node_page(sbi, inode->i_ino); if (IS_ERR(node_page)) return PTR_ERR(node_page); rn = page_address(node_page); ri = &(rn->i); inode->i_mode = le16_to_cpu(ri->i_mode); i_uid_write(inode, le32_to_cpu(ri->i_uid)); i_gid_write(inode, le32_to_cpu(ri->i_gid)); set_nlink(inode, le32_to_cpu(ri->i_links)); inode->i_size = le64_to_cpu(ri->i_size); inode->i_blocks = le64_to_cpu(ri->i_blocks); inode->i_atime.tv_sec = le64_to_cpu(ri->i_atime); inode->i_ctime.tv_sec = le64_to_cpu(ri->i_ctime); inode->i_mtime.tv_sec = le64_to_cpu(ri->i_mtime); inode->i_atime.tv_nsec = le32_to_cpu(ri->i_atime_nsec); inode->i_ctime.tv_nsec = le32_to_cpu(ri->i_ctime_nsec); inode->i_mtime.tv_nsec = le32_to_cpu(ri->i_mtime_nsec); inode->i_generation = le32_to_cpu(ri->i_generation); fi->i_current_depth = le32_to_cpu(ri->i_current_depth); fi->i_xattr_nid = le32_to_cpu(ri->i_xattr_nid); fi->i_flags = le32_to_cpu(ri->i_flags); fi->flags = 0; fi->data_version = le64_to_cpu(F2FS_CKPT(sbi)->checkpoint_ver) - 1; fi->i_advise = ri->i_advise; fi->i_pino = le32_to_cpu(ri->i_pino); get_extent_info(&fi->ext, ri->i_ext); f2fs_put_page(node_page, 1); return 0; } struct inode *f2fs_iget(struct super_block *sb, unsigned long ino) { struct f2fs_sb_info *sbi = F2FS_SB(sb); struct inode *inode; int ret; inode = iget_locked(sb, ino); if (!inode) return ERR_PTR(-ENOMEM); if (!(inode->i_state & I_NEW)) return inode; if (ino == F2FS_NODE_INO(sbi) || ino == F2FS_META_INO(sbi)) goto make_now; ret = do_read_inode(inode); if (ret) goto bad_inode; if (!sbi->por_doing && inode->i_nlink == 0) { ret = -ENOENT; goto bad_inode; } make_now: if (ino == F2FS_NODE_INO(sbi)) { inode->i_mapping->a_ops = &f2fs_node_aops; mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO); } else if (ino == F2FS_META_INO(sbi)) { inode->i_mapping->a_ops = &f2fs_meta_aops; mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_ZERO); } else if (S_ISREG(inode->i_mode)) { inode->i_op = &f2fs_file_inode_operations; inode->i_fop = &f2fs_file_operations; inode->i_mapping->a_ops = &f2fs_dblock_aops; } else if (S_ISDIR(inode->i_mode)) { inode->i_op = &f2fs_dir_inode_operations; inode->i_fop = &f2fs_dir_operations; inode->i_mapping->a_ops = &f2fs_dblock_aops; mapping_set_gfp_mask(inode->i_mapping, GFP_HIGHUSER_MOVABLE | __GFP_ZERO); } else if (S_ISLNK(inode->i_mode)) { inode->i_op = &f2fs_symlink_inode_operations; inode->i_mapping->a_ops = &f2fs_dblock_aops; } else if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) || S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) { inode->i_op = &f2fs_special_inode_operations; init_special_inode(inode, inode->i_mode, inode->i_rdev); } else { ret = -EIO; goto bad_inode; } unlock_new_inode(inode); return inode; bad_inode: iget_failed(inode); return ERR_PTR(ret); } void update_inode(struct inode *inode, struct page *node_page) { struct f2fs_node *rn; struct f2fs_inode *ri; wait_on_page_writeback(node_page); rn = page_address(node_page); ri = &(rn->i); ri->i_mode = cpu_to_le16(inode->i_mode); ri->i_advise = F2FS_I(inode)->i_advise; ri->i_uid = cpu_to_le32(i_uid_read(inode)); ri->i_gid = cpu_to_le32(i_gid_read(inode)); ri->i_links = cpu_to_le32(inode->i_nlink); ri->i_size = cpu_to_le64(i_size_read(inode)); ri->i_blocks = cpu_to_le64(inode->i_blocks); set_raw_extent(&F2FS_I(inode)->ext, &ri->i_ext); ri->i_atime = cpu_to_le64(inode->i_atime.tv_sec); ri->i_ctime = cpu_to_le64(inode->i_ctime.tv_sec); ri->i_mtime = cpu_to_le64(inode->i_mtime.tv_sec); ri->i_atime_nsec = cpu_to_le32(inode->i_atime.tv_nsec); ri->i_ctime_nsec = cpu_to_le32(inode->i_ctime.tv_nsec); ri->i_mtime_nsec = cpu_to_le32(inode->i_mtime.tv_nsec); ri->i_current_depth = cpu_to_le32(F2FS_I(inode)->i_current_depth); ri->i_xattr_nid = cpu_to_le32(F2FS_I(inode)->i_xattr_nid); ri->i_flags = cpu_to_le32(F2FS_I(inode)->i_flags); ri->i_pino = cpu_to_le32(F2FS_I(inode)->i_pino); ri->i_generation = cpu_to_le32(inode->i_generation); set_page_dirty(node_page); } int f2fs_write_inode(struct inode *inode, struct writeback_control *wbc) { struct f2fs_sb_info *sbi = F2FS_SB(inode->i_sb); struct page *node_page; bool need_lock = false; if (inode->i_ino == F2FS_NODE_INO(sbi) || inode->i_ino == F2FS_META_INO(sbi)) return 0; node_page = get_node_page(sbi, inode->i_ino); if (IS_ERR(node_page)) return PTR_ERR(node_page); if (!PageDirty(node_page)) { need_lock = true; f2fs_put_page(node_page, 1); mutex_lock(&sbi->write_inode); node_page = get_node_page(sbi, inode->i_ino); if (IS_ERR(node_page)) { mutex_unlock(&sbi->write_inode); return PTR_ERR(node_page); } } update_inode(inode, node_page); f2fs_put_page(node_page, 1); if (need_lock) mutex_unlock(&sbi->write_inode); 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_SB(inode->i_sb); truncate_inode_pages(&inode->i_data, 0); if (inode->i_ino == F2FS_NODE_INO(sbi) || inode->i_ino == F2FS_META_INO(sbi)) goto no_delete; BUG_ON(atomic_read(&F2FS_I(inode)->dirty_dents)); remove_dirty_dir_inode(inode); if (inode->i_nlink || is_bad_inode(inode)) goto no_delete; set_inode_flag(F2FS_I(inode), FI_NO_ALLOC); i_size_write(inode, 0); if (F2FS_HAS_BLOCKS(inode)) f2fs_truncate(inode); remove_inode_page(inode); no_delete: clear_inode(inode); }