From 57f0f512b273f60d52568b8c6b77e17f5636edc0 Mon Sep 17 00:00:00 2001 From: André Fabian Silva Delgado Date: Wed, 5 Aug 2015 17:04:01 -0300 Subject: Initial import --- fs/f2fs/inode.c | 387 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 387 insertions(+) create mode 100644 fs/f2fs/inode.c (limited to 'fs/f2fs/inode.c') diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c new file mode 100644 index 000000000..e622ec954 --- /dev/null +++ b/fs/f2fs/inode.c @@ -0,0 +1,387 @@ +/* + * 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 +#include +#include +#include +#include + +#include "f2fs.h" +#include "node.h" + +#include + +void f2fs_set_inode_flags(struct inode *inode) +{ + unsigned int flags = F2FS_I(inode)->i_flags; + unsigned int new_fl = 0; + + if (flags & FS_SYNC_FL) + new_fl |= S_SYNC; + if (flags & FS_APPEND_FL) + new_fl |= S_APPEND; + if (flags & FS_IMMUTABLE_FL) + new_fl |= S_IMMUTABLE; + if (flags & FS_NOATIME_FL) + new_fl |= S_NOATIME; + if (flags & FS_DIRSYNC_FL) + new_fl |= S_DIRSYNC; + set_mask_bits(&inode->i_flags, + S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC, new_fl); +} + +static void __get_inode_rdev(struct inode *inode, struct f2fs_inode *ri) +{ + if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode) || + S_ISFIFO(inode->i_mode) || S_ISSOCK(inode->i_mode)) { + if (ri->i_addr[0]) + inode->i_rdev = + old_decode_dev(le32_to_cpu(ri->i_addr[0])); + else + inode->i_rdev = + new_decode_dev(le32_to_cpu(ri->i_addr[1])); + } +} + +static bool __written_first_block(struct f2fs_inode *ri) +{ + block_t addr = le32_to_cpu(ri->i_addr[0]); + + if (addr != NEW_ADDR && addr != NULL_ADDR) + return true; + return false; +} + +static void __set_inode_rdev(struct inode *inode, struct f2fs_inode *ri) +{ + if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) { + if (old_valid_dev(inode->i_rdev)) { + ri->i_addr[0] = + cpu_to_le32(old_encode_dev(inode->i_rdev)); + ri->i_addr[1] = 0; + } else { + ri->i_addr[0] = 0; + ri->i_addr[1] = + cpu_to_le32(new_encode_dev(inode->i_rdev)); + ri->i_addr[2] = 0; + } + } +} + +static void __recover_inline_status(struct inode *inode, struct page *ipage) +{ + void *inline_data = inline_data_addr(ipage); + __le32 *start = inline_data; + __le32 *end = start + MAX_INLINE_DATA / sizeof(__le32); + + while (start < end) { + if (*start++) { + f2fs_wait_on_page_writeback(ipage, NODE); + + set_inode_flag(F2FS_I(inode), FI_DATA_EXIST); + set_raw_inline(F2FS_I(inode), F2FS_INODE(ipage)); + set_page_dirty(ipage); + return; + } + } + return; +} + +static int do_read_inode(struct inode *inode) +{ + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + struct f2fs_inode_info *fi = F2FS_I(inode); + struct page *node_page; + struct f2fs_inode *ri; + + /* Check if ino is within scope */ + if (check_nid_range(sbi, inode->i_ino)) { + f2fs_msg(inode->i_sb, KERN_ERR, "bad inode number: %lu", + (unsigned long) inode->i_ino); + WARN_ON(1); + return -EINVAL; + } + + node_page = get_node_page(sbi, inode->i_ino); + if (IS_ERR(node_page)) + return PTR_ERR(node_page); + + ri = F2FS_INODE(node_page); + + 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->i_advise = ri->i_advise; + fi->i_pino = le32_to_cpu(ri->i_pino); + fi->i_dir_level = ri->i_dir_level; + + f2fs_init_extent_cache(inode, &ri->i_ext); + + get_inline_info(fi, ri); + + /* check data exist */ + if (f2fs_has_inline_data(inode) && !f2fs_exist_data(inode)) + __recover_inline_status(inode, node_page); + + /* get rdev by using inline_info */ + __get_inode_rdev(inode, ri); + + if (__written_first_block(ri)) + set_inode_flag(F2FS_I(inode), FI_FIRST_BLOCK_WRITTEN); + + f2fs_put_page(node_page, 1); + + stat_inc_inline_inode(inode); + stat_inc_inline_dir(inode); + + 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 = 0; + + inode = iget_locked(sb, ino); + if (!inode) + return ERR_PTR(-ENOMEM); + + if (!(inode->i_state & I_NEW)) { + trace_f2fs_iget(inode); + 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; +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_F2FS_HIGH_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); + trace_f2fs_iget(inode); + return inode; + +bad_inode: + iget_failed(inode); + trace_f2fs_iget_exit(inode, ret); + return ERR_PTR(ret); +} + +void update_inode(struct inode *inode, struct page *node_page) +{ + struct f2fs_inode *ri; + + f2fs_wait_on_page_writeback(node_page, NODE); + + ri = F2FS_INODE(node_page); + + 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); + + read_lock(&F2FS_I(inode)->ext_lock); + set_raw_extent(&F2FS_I(inode)->ext, &ri->i_ext); + read_unlock(&F2FS_I(inode)->ext_lock); + + set_raw_inline(F2FS_I(inode), ri); + + 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); + ri->i_dir_level = F2FS_I(inode)->i_dir_level; + + __set_inode_rdev(inode, ri); + set_cold_node(inode, node_page); + set_page_dirty(node_page); + + clear_inode_flag(F2FS_I(inode), FI_DIRTY_INODE); +} + +void update_inode_page(struct inode *inode) +{ + struct f2fs_sb_info *sbi = F2FS_I_SB(inode); + struct page *node_page; +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); + } + return; + } + update_inode(inode, node_page); + f2fs_put_page(node_page, 1); +} + +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(F2FS_I(inode), FI_DIRTY_INODE)) + return 0; + + /* + * We need to lock here to prevent from producing dirty node pages + * during the urgent cleaning time when runing out of free sections. + */ + f2fs_lock_op(sbi); + update_inode_page(inode); + f2fs_unlock_op(sbi); + + if (wbc) + f2fs_balance_fs(sbi); + + 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; + + /* some remained atomic pages should discarded */ + if (f2fs_is_atomic_file(inode)) + commit_inmem_pages(inode, true); + + 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_dir_inode(inode); + + if (inode->i_nlink || is_bad_inode(inode)) + goto no_delete; + + sb_start_intwrite(inode->i_sb); + set_inode_flag(F2FS_I(inode), FI_NO_ALLOC); + i_size_write(inode, 0); + + if (F2FS_HAS_BLOCKS(inode)) + f2fs_truncate(inode); + + f2fs_lock_op(sbi); + remove_inode_page(inode); + f2fs_unlock_op(sbi); + + sb_end_intwrite(inode->i_sb); +no_delete: + stat_dec_inline_dir(inode); + stat_dec_inline_inode(inode); + + /* update extent info in inode */ + if (inode->i_nlink) + f2fs_preserve_extent_tree(inode); + f2fs_destroy_extent_tree(inode); + + invalidate_mapping_pages(NODE_MAPPING(sbi), inode->i_ino, inode->i_ino); + if (xnid) + invalidate_mapping_pages(NODE_MAPPING(sbi), xnid, xnid); + if (is_inode_flag_set(F2FS_I(inode), FI_APPEND_WRITE)) + add_dirty_inode(sbi, inode->i_ino, APPEND_INO); + if (is_inode_flag_set(F2FS_I(inode), FI_UPDATE_WRITE)) + add_dirty_inode(sbi, inode->i_ino, UPDATE_INO); +out_clear: + 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); + + clear_nlink(inode); + make_bad_inode(inode); + unlock_new_inode(inode); + + i_size_write(inode, 0); + if (F2FS_HAS_BLOCKS(inode)) + f2fs_truncate(inode); + + remove_inode_page(inode); + + clear_inode_flag(F2FS_I(inode), FI_INLINE_DATA); + clear_inode_flag(F2FS_I(inode), FI_INLINE_DENTRY); + alloc_nid_failed(sbi, inode->i_ino); + f2fs_unlock_op(sbi); + + /* iput will drop the inode object */ + iput(inode); +} -- cgit v1.2.3-54-g00ecf