--- zzzz-none-000/linux-3.10.107/fs/f2fs/namei.c 2017-06-27 09:49:32.000000000 +0000 +++ scorpion-7490-727/linux-3.10.107/fs/f2fs/namei.c 2021-02-04 17:41:59.000000000 +0000 @@ -13,6 +13,8 @@ #include #include #include +#include +#include #include "f2fs.h" #include "node.h" @@ -22,37 +24,27 @@ static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode) { - struct super_block *sb = dir->i_sb; - struct f2fs_sb_info *sbi = F2FS_SB(sb); + struct f2fs_sb_info *sbi = F2FS_I_SB(dir); nid_t ino; struct inode *inode; bool nid_free = false; - int err, ilock; + int err; - inode = new_inode(sb); + inode = new_inode(dir->i_sb); if (!inode) return ERR_PTR(-ENOMEM); - ilock = mutex_lock_op(sbi); + f2fs_lock_op(sbi); if (!alloc_nid(sbi, &ino)) { - mutex_unlock_op(sbi, ilock); + f2fs_unlock_op(sbi); err = -ENOSPC; goto fail; } - mutex_unlock_op(sbi, ilock); + f2fs_unlock_op(sbi); - inode->i_uid = current_fsuid(); - - if (dir->i_mode & S_ISGID) { - inode->i_gid = dir->i_gid; - if (S_ISDIR(mode)) - mode |= S_ISGID; - } else { - inode->i_gid = current_fsgid(); - } + inode_init_owner(inode, dir, mode); inode->i_ino = ino; - inode->i_mode = mode; inode->i_blocks = 0; inode->i_mtime = inode->i_atime = inode->i_ctime = CURRENT_TIME; inode->i_generation = sbi->s_next_generation++; @@ -61,21 +53,34 @@ if (err) { err = -EINVAL; nid_free = true; - goto out; + goto fail; } + + /* If the directory encrypted, then we should encrypt the inode. */ + if (f2fs_encrypted_inode(dir) && f2fs_may_encrypt(inode)) + f2fs_set_encrypted_inode(inode); + + if (f2fs_may_inline_data(inode)) + set_inode_flag(F2FS_I(inode), FI_INLINE_DATA); + if (f2fs_may_inline_dentry(inode)) + set_inode_flag(F2FS_I(inode), FI_INLINE_DENTRY); + + f2fs_init_extent_tree(inode, NULL); + + stat_inc_inline_xattr(inode); + stat_inc_inline_inode(inode); + stat_inc_inline_dir(inode); + trace_f2fs_new_inode(inode, 0); mark_inode_dirty(inode); return inode; -out: - clear_nlink(inode); - unlock_new_inode(inode); fail: trace_f2fs_new_inode(inode, err); make_bad_inode(inode); - iput(inode); if (nid_free) - alloc_nid_failed(sbi, ino); + set_inode_flag(F2FS_I(inode), FI_FREE_NID); + iput(inode); return ERR_PTR(err); } @@ -83,21 +88,18 @@ { size_t slen = strlen(s); size_t sublen = strlen(sub); - int ret; - if (sublen > slen) + /* + * filename format of multimedia file should be defined as: + * "filename + '.' + extension". + */ + if (slen < sublen + 2) return 0; - ret = memcmp(s + slen - sublen, sub, sublen); - if (ret) { /* compare upper case */ - int i; - char upper_sub[8]; - for (i = 0; i < sublen && i < sizeof(upper_sub); i++) - upper_sub[i] = toupper(sub[i]); - return !memcmp(s + slen - sublen, upper_sub, sublen); - } + if (s[slen - sublen - 1] != '.') + return 0; - return !ret; + return !strncasecmp(s + slen - sublen, sub, sublen); } /* @@ -112,7 +114,7 @@ int count = le32_to_cpu(sbi->raw_super->extension_count); for (i = 0; i < count; i++) { if (is_multimedia_file(name, extlist[i])) { - set_cold_file(inode); + file_set_cold(inode); break; } } @@ -121,11 +123,10 @@ static int f2fs_create(struct inode *dir, struct dentry *dentry, umode_t mode, bool excl) { - struct super_block *sb = dir->i_sb; - struct f2fs_sb_info *sbi = F2FS_SB(sb); + struct f2fs_sb_info *sbi = F2FS_I_SB(dir); struct inode *inode; nid_t ino = 0; - int err, ilock; + int err; f2fs_balance_fs(sbi); @@ -141,69 +142,105 @@ inode->i_mapping->a_ops = &f2fs_dblock_aops; ino = inode->i_ino; - ilock = mutex_lock_op(sbi); + f2fs_lock_op(sbi); err = f2fs_add_link(dentry, inode); - mutex_unlock_op(sbi, ilock); if (err) goto out; + f2fs_unlock_op(sbi); alloc_nid_done(sbi, ino); - if (!sbi->por_doing) - d_instantiate(dentry, inode); + d_instantiate(dentry, inode); unlock_new_inode(inode); + + if (IS_DIRSYNC(dir)) + f2fs_sync_fs(sbi->sb, 1); return 0; out: - clear_nlink(inode); - unlock_new_inode(inode); - make_bad_inode(inode); - iput(inode); - alloc_nid_failed(sbi, ino); + handle_failed_inode(inode); return err; } static int f2fs_link(struct dentry *old_dentry, struct inode *dir, struct dentry *dentry) { - struct inode *inode = old_dentry->d_inode; - struct super_block *sb = dir->i_sb; - struct f2fs_sb_info *sbi = F2FS_SB(sb); - int err, ilock; + struct inode *inode = d_inode(old_dentry); + struct f2fs_sb_info *sbi = F2FS_I_SB(dir); + int err; + + if (f2fs_encrypted_inode(dir) && + !f2fs_is_child_context_consistent_with_parent(dir, inode)) + return -EPERM; f2fs_balance_fs(sbi); inode->i_ctime = CURRENT_TIME; - atomic_inc(&inode->i_count); + ihold(inode); set_inode_flag(F2FS_I(inode), FI_INC_LINK); - ilock = mutex_lock_op(sbi); + f2fs_lock_op(sbi); err = f2fs_add_link(dentry, inode); - mutex_unlock_op(sbi, ilock); if (err) goto out; - - /* - * This file should be checkpointed during fsync. - * We lost i_pino from now on. - */ - set_cp_file(inode); + f2fs_unlock_op(sbi); d_instantiate(dentry, inode); + + if (IS_DIRSYNC(dir)) + f2fs_sync_fs(sbi->sb, 1); return 0; out: clear_inode_flag(F2FS_I(inode), FI_INC_LINK); - make_bad_inode(inode); iput(inode); + f2fs_unlock_op(sbi); return err; } struct dentry *f2fs_get_parent(struct dentry *child) { struct qstr dotdot = QSTR_INIT("..", 2); - unsigned long ino = f2fs_inode_by_name(child->d_inode, &dotdot); + unsigned long ino = f2fs_inode_by_name(d_inode(child), &dotdot); if (!ino) return ERR_PTR(-ENOENT); - return d_obtain_alias(f2fs_iget(child->d_inode->i_sb, ino)); + return d_obtain_alias(f2fs_iget(d_inode(child)->i_sb, ino)); +} + +static int __recover_dot_dentries(struct inode *dir, nid_t pino) +{ + struct f2fs_sb_info *sbi = F2FS_I_SB(dir); + struct qstr dot = QSTR_INIT(".", 1); + struct qstr dotdot = QSTR_INIT("..", 2); + struct f2fs_dir_entry *de; + struct page *page; + int err = 0; + + f2fs_lock_op(sbi); + + de = f2fs_find_entry(dir, &dot, &page); + if (de) { + f2fs_dentry_kunmap(dir, page); + f2fs_put_page(page, 0); + } else { + err = __f2fs_add_link(dir, &dot, NULL, dir->i_ino, S_IFDIR); + if (err) + goto out; + } + + de = f2fs_find_entry(dir, &dotdot, &page); + if (de) { + f2fs_dentry_kunmap(dir, page); + f2fs_put_page(page, 0); + } else { + err = __f2fs_add_link(dir, &dotdot, NULL, pino, S_IFDIR); + } +out: + if (!err) { + clear_inode_flag(F2FS_I(dir), FI_INLINE_DOTS); + mark_inode_dirty(dir); + } + + f2fs_unlock_op(sbi); + return err; } static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry, @@ -212,33 +249,43 @@ struct inode *inode = NULL; struct f2fs_dir_entry *de; struct page *page; + nid_t ino; + int err = 0; if (dentry->d_name.len > F2FS_NAME_LEN) return ERR_PTR(-ENAMETOOLONG); de = f2fs_find_entry(dir, &dentry->d_name, &page); - if (de) { - nid_t ino = le32_to_cpu(de->ino); - kunmap(page); - f2fs_put_page(page, 0); + if (!de) + return d_splice_alias(inode, dentry); - inode = f2fs_iget(dir->i_sb, ino); - if (IS_ERR(inode)) - return ERR_CAST(inode); - } + ino = le32_to_cpu(de->ino); + f2fs_dentry_kunmap(dir, page); + f2fs_put_page(page, 0); + + inode = f2fs_iget(dir->i_sb, ino); + if (IS_ERR(inode)) + return ERR_CAST(inode); + if (f2fs_has_inline_dots(inode)) { + err = __recover_dot_dentries(inode, dir->i_ino); + if (err) + goto err_out; + } return d_splice_alias(inode, dentry); + +err_out: + iget_failed(inode); + return ERR_PTR(err); } static int f2fs_unlink(struct inode *dir, struct dentry *dentry) { - struct super_block *sb = dir->i_sb; - struct f2fs_sb_info *sbi = F2FS_SB(sb); - struct inode *inode = dentry->d_inode; + struct f2fs_sb_info *sbi = F2FS_I_SB(dir); + struct inode *inode = d_inode(dentry); struct f2fs_dir_entry *de; struct page *page; int err = -ENOENT; - int ilock; trace_f2fs_unlink_enter(dir, dentry); f2fs_balance_fs(sbi); @@ -247,32 +294,52 @@ if (!de) goto fail; - err = check_orphan_space(sbi); + f2fs_lock_op(sbi); + err = acquire_orphan_inode(sbi); if (err) { - kunmap(page); + f2fs_unlock_op(sbi); + f2fs_dentry_kunmap(dir, page); f2fs_put_page(page, 0); goto fail; } + f2fs_delete_entry(de, page, dir, inode); + f2fs_unlock_op(sbi); - ilock = mutex_lock_op(sbi); - f2fs_delete_entry(de, page, inode); - mutex_unlock_op(sbi, ilock); - - /* In order to evict this inode, we set it dirty */ + /* In order to evict this inode, we set it dirty */ mark_inode_dirty(inode); + + if (IS_DIRSYNC(dir)) + f2fs_sync_fs(sbi->sb, 1); fail: trace_f2fs_unlink_exit(inode, err); return err; } +static const char *f2fs_follow_link(struct dentry *dentry, void **cookie) +{ + const char *link = page_follow_link_light(dentry, cookie); + if (!IS_ERR(link) && !*link) { + /* this is broken symlink case */ + page_put_link(NULL, *cookie); + link = ERR_PTR(-ENOENT); + } + return link; +} + static int f2fs_symlink(struct inode *dir, struct dentry *dentry, const char *symname) { - struct super_block *sb = dir->i_sb; - struct f2fs_sb_info *sbi = F2FS_SB(sb); + struct f2fs_sb_info *sbi = F2FS_I_SB(dir); struct inode *inode; - size_t symlen = strlen(symname) + 1; - int err, ilock; + size_t len = strlen(symname); + size_t p_len; + char *p_str; + struct f2fs_str disk_link = FSTR_INIT(NULL, 0); + struct f2fs_encrypted_symlink_data *sd = NULL; + int err; + + if (len > dir->i_sb->s_blocksize) + return -ENAMETOOLONG; f2fs_balance_fs(sbi); @@ -280,35 +347,91 @@ if (IS_ERR(inode)) return PTR_ERR(inode); - inode->i_op = &f2fs_symlink_inode_operations; + if (f2fs_encrypted_inode(inode)) + inode->i_op = &f2fs_encrypted_symlink_inode_operations; + else + inode->i_op = &f2fs_symlink_inode_operations; inode->i_mapping->a_ops = &f2fs_dblock_aops; - ilock = mutex_lock_op(sbi); + f2fs_lock_op(sbi); err = f2fs_add_link(dentry, inode); - mutex_unlock_op(sbi, ilock); if (err) goto out; - - err = page_symlink(inode, symname, symlen); + f2fs_unlock_op(sbi); alloc_nid_done(sbi, inode->i_ino); + if (f2fs_encrypted_inode(dir)) { + struct qstr istr = QSTR_INIT(symname, len); + + err = f2fs_get_encryption_info(inode); + if (err) + goto err_out; + + err = f2fs_fname_crypto_alloc_buffer(inode, len, &disk_link); + if (err) + goto err_out; + + err = f2fs_fname_usr_to_disk(inode, &istr, &disk_link); + if (err < 0) + goto err_out; + + p_len = encrypted_symlink_data_len(disk_link.len) + 1; + + if (p_len > dir->i_sb->s_blocksize) { + err = -ENAMETOOLONG; + goto err_out; + } + + sd = kzalloc(p_len, GFP_NOFS); + if (!sd) { + err = -ENOMEM; + goto err_out; + } + memcpy(sd->encrypted_path, disk_link.name, disk_link.len); + sd->len = cpu_to_le16(disk_link.len); + p_str = (char *)sd; + } else { + p_len = len + 1; + p_str = (char *)symname; + } + + err = page_symlink(inode, p_str, p_len); + +err_out: d_instantiate(dentry, inode); unlock_new_inode(inode); + + /* + * Let's flush symlink data in order to avoid broken symlink as much as + * possible. Nevertheless, fsyncing is the best way, but there is no + * way to get a file descriptor in order to flush that. + * + * Note that, it needs to do dir->fsync to make this recoverable. + * If the symlink path is stored into inline_data, there is no + * performance regression. + */ + if (!err) { + filemap_write_and_wait_range(inode->i_mapping, 0, p_len - 1); + + if (IS_DIRSYNC(dir)) + f2fs_sync_fs(sbi->sb, 1); + } else { + f2fs_unlink(dir, dentry); + } + + kfree(sd); + f2fs_fname_crypto_free_buffer(&disk_link); return err; out: - clear_nlink(inode); - unlock_new_inode(inode); - make_bad_inode(inode); - iput(inode); - alloc_nid_failed(sbi, inode->i_ino); + handle_failed_inode(inode); return err; } static int f2fs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode) { - struct f2fs_sb_info *sbi = F2FS_SB(dir->i_sb); + struct f2fs_sb_info *sbi = F2FS_I_SB(dir); struct inode *inode; - int err, ilock; + int err; f2fs_balance_fs(sbi); @@ -319,35 +442,33 @@ 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_ZERO); + mapping_set_gfp_mask(inode->i_mapping, GFP_F2FS_HIGH_ZERO); set_inode_flag(F2FS_I(inode), FI_INC_LINK); - ilock = mutex_lock_op(sbi); + f2fs_lock_op(sbi); err = f2fs_add_link(dentry, inode); - mutex_unlock_op(sbi, ilock); if (err) goto out_fail; + f2fs_unlock_op(sbi); alloc_nid_done(sbi, inode->i_ino); d_instantiate(dentry, inode); unlock_new_inode(inode); + if (IS_DIRSYNC(dir)) + f2fs_sync_fs(sbi->sb, 1); return 0; out_fail: clear_inode_flag(F2FS_I(inode), FI_INC_LINK); - clear_nlink(inode); - unlock_new_inode(inode); - make_bad_inode(inode); - iput(inode); - alloc_nid_failed(sbi, inode->i_ino); + handle_failed_inode(inode); return err; } static int f2fs_rmdir(struct inode *dir, struct dentry *dentry) { - struct inode *inode = dentry->d_inode; + struct inode *inode = d_inode(dentry); if (f2fs_empty_dir(inode)) return f2fs_unlink(dir, dentry); return -ENOTEMPTY; @@ -356,14 +477,9 @@ static int f2fs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode, dev_t rdev) { - struct super_block *sb = dir->i_sb; - struct f2fs_sb_info *sbi = F2FS_SB(sb); + struct f2fs_sb_info *sbi = F2FS_I_SB(dir); struct inode *inode; int err = 0; - int ilock; - - if (!new_valid_dev(rdev)) - return -EINVAL; f2fs_balance_fs(sbi); @@ -374,38 +490,119 @@ init_special_inode(inode, inode->i_mode, rdev); inode->i_op = &f2fs_special_inode_operations; - ilock = mutex_lock_op(sbi); + f2fs_lock_op(sbi); err = f2fs_add_link(dentry, inode); - mutex_unlock_op(sbi, ilock); if (err) goto out; + f2fs_unlock_op(sbi); alloc_nid_done(sbi, inode->i_ino); + d_instantiate(dentry, inode); unlock_new_inode(inode); + + if (IS_DIRSYNC(dir)) + f2fs_sync_fs(sbi->sb, 1); return 0; out: - clear_nlink(inode); + handle_failed_inode(inode); + return err; +} + +static int __f2fs_tmpfile(struct inode *dir, struct dentry *dentry, + umode_t mode, struct inode **whiteout) +{ + struct f2fs_sb_info *sbi = F2FS_I_SB(dir); + struct inode *inode; + int err; + + if (!whiteout) + f2fs_balance_fs(sbi); + + inode = f2fs_new_inode(dir, mode); + if (IS_ERR(inode)) + return PTR_ERR(inode); + + if (whiteout) { + init_special_inode(inode, inode->i_mode, WHITEOUT_DEV); + inode->i_op = &f2fs_special_inode_operations; + } else { + inode->i_op = &f2fs_file_inode_operations; + inode->i_fop = &f2fs_file_operations; + inode->i_mapping->a_ops = &f2fs_dblock_aops; + } + + f2fs_lock_op(sbi); + err = acquire_orphan_inode(sbi); + if (err) + goto out; + + err = f2fs_do_tmpfile(inode, dir); + if (err) + goto release_out; + + /* + * add this non-linked tmpfile to orphan list, in this way we could + * remove all unused data of tmpfile after abnormal power-off. + */ + add_orphan_inode(sbi, inode->i_ino); + f2fs_unlock_op(sbi); + + alloc_nid_done(sbi, inode->i_ino); + + if (whiteout) { + inode_dec_link_count(inode); + *whiteout = inode; + } else { + d_tmpfile(dentry, inode); + } unlock_new_inode(inode); - make_bad_inode(inode); - iput(inode); - alloc_nid_failed(sbi, inode->i_ino); + return 0; + +release_out: + release_orphan_inode(sbi); +out: + handle_failed_inode(inode); return err; } +static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode) +{ + if (f2fs_encrypted_inode(dir)) { + int err = f2fs_get_encryption_info(dir); + if (err) + return err; + } + + return __f2fs_tmpfile(dir, dentry, mode, NULL); +} + +static int f2fs_create_whiteout(struct inode *dir, struct inode **whiteout) +{ + return __f2fs_tmpfile(dir, NULL, S_IFCHR | WHITEOUT_MODE, whiteout); +} + static int f2fs_rename(struct inode *old_dir, struct dentry *old_dentry, - struct inode *new_dir, struct dentry *new_dentry) + struct inode *new_dir, struct dentry *new_dentry, + unsigned int flags) { - struct super_block *sb = old_dir->i_sb; - struct f2fs_sb_info *sbi = F2FS_SB(sb); - struct inode *old_inode = old_dentry->d_inode; - struct inode *new_inode = new_dentry->d_inode; + struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); + struct inode *old_inode = d_inode(old_dentry); + struct inode *new_inode = d_inode(new_dentry); + struct inode *whiteout = NULL; struct page *old_dir_page; - struct page *old_page; + struct page *old_page, *new_page = NULL; struct f2fs_dir_entry *old_dir_entry = NULL; struct f2fs_dir_entry *old_entry; struct f2fs_dir_entry *new_entry; - int err = -ENOENT, ilock = -1; + int err = -ENOENT; + + if ((old_dir != new_dir) && f2fs_encrypted_inode(new_dir) && + !f2fs_is_child_context_consistent_with_parent(new_dir, + old_inode)) { + err = -EPERM; + goto out; + } f2fs_balance_fs(sbi); @@ -420,34 +617,62 @@ goto out_old; } - ilock = mutex_lock_op(sbi); + if (flags & RENAME_WHITEOUT) { + err = f2fs_create_whiteout(old_dir, &whiteout); + if (err) + goto out_dir; + } if (new_inode) { - struct page *new_page; err = -ENOTEMPTY; if (old_dir_entry && !f2fs_empty_dir(new_inode)) - goto out_dir; + goto out_whiteout; err = -ENOENT; new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page); if (!new_entry) - goto out_dir; + goto out_whiteout; + + f2fs_lock_op(sbi); + + err = acquire_orphan_inode(sbi); + if (err) + goto put_out_dir; + + if (update_dent_inode(old_inode, new_inode, + &new_dentry->d_name)) { + release_orphan_inode(sbi); + goto put_out_dir; + } f2fs_set_link(new_dir, new_entry, new_page, old_inode); new_inode->i_ctime = CURRENT_TIME; + down_write(&F2FS_I(new_inode)->i_sem); if (old_dir_entry) drop_nlink(new_inode); drop_nlink(new_inode); + up_write(&F2FS_I(new_inode)->i_sem); + + mark_inode_dirty(new_inode); + if (!new_inode->i_nlink) add_orphan_inode(sbi, new_inode->i_ino); + else + release_orphan_inode(sbi); + + update_inode_page(old_inode); update_inode_page(new_inode); } else { + f2fs_lock_op(sbi); + err = f2fs_add_link(new_dentry, old_inode); - if (err) - goto out_dir; + if (err) { + f2fs_unlock_op(sbi); + goto out_whiteout; + } if (old_dir_entry) { inc_nlink(new_dir); @@ -455,39 +680,332 @@ } } + down_write(&F2FS_I(old_inode)->i_sem); + file_lost_pino(old_inode); + if (new_inode && file_enc_name(new_inode)) + file_set_enc_name(old_inode); + up_write(&F2FS_I(old_inode)->i_sem); + old_inode->i_ctime = CURRENT_TIME; mark_inode_dirty(old_inode); - f2fs_delete_entry(old_entry, old_page, NULL); + f2fs_delete_entry(old_entry, old_page, old_dir, NULL); + + if (whiteout) { + whiteout->i_state |= I_LINKABLE; + set_inode_flag(F2FS_I(whiteout), FI_INC_LINK); + err = f2fs_add_link(old_dentry, whiteout); + if (err) + goto put_out_dir; + whiteout->i_state &= ~I_LINKABLE; + iput(whiteout); + } if (old_dir_entry) { - if (old_dir != new_dir) { + if (old_dir != new_dir && !whiteout) { f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir); + update_inode_page(old_inode); } else { - kunmap(old_dir_page); + f2fs_dentry_kunmap(old_inode, old_dir_page); f2fs_put_page(old_dir_page, 0); } drop_nlink(old_dir); + mark_inode_dirty(old_dir); update_inode_page(old_dir); } - mutex_unlock_op(sbi, ilock); + f2fs_unlock_op(sbi); + + if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) + f2fs_sync_fs(sbi->sb, 1); return 0; +put_out_dir: + f2fs_unlock_op(sbi); + if (new_page) { + f2fs_dentry_kunmap(new_dir, new_page); + f2fs_put_page(new_page, 0); + } +out_whiteout: + if (whiteout) + iput(whiteout); out_dir: if (old_dir_entry) { - kunmap(old_dir_page); + f2fs_dentry_kunmap(old_inode, old_dir_page); f2fs_put_page(old_dir_page, 0); } - mutex_unlock_op(sbi, ilock); out_old: - kunmap(old_page); + f2fs_dentry_kunmap(old_dir, old_page); f2fs_put_page(old_page, 0); out: return err; } +static int f2fs_cross_rename(struct inode *old_dir, struct dentry *old_dentry, + struct inode *new_dir, struct dentry *new_dentry) +{ + struct f2fs_sb_info *sbi = F2FS_I_SB(old_dir); + struct inode *old_inode = d_inode(old_dentry); + struct inode *new_inode = d_inode(new_dentry); + struct page *old_dir_page, *new_dir_page; + struct page *old_page, *new_page; + struct f2fs_dir_entry *old_dir_entry = NULL, *new_dir_entry = NULL; + struct f2fs_dir_entry *old_entry, *new_entry; + int old_nlink = 0, new_nlink = 0; + int err = -ENOENT; + + if ((f2fs_encrypted_inode(old_dir) || f2fs_encrypted_inode(new_dir)) && + (old_dir != new_dir) && + (!f2fs_is_child_context_consistent_with_parent(new_dir, + old_inode) || + !f2fs_is_child_context_consistent_with_parent(old_dir, + new_inode))) + return -EPERM; + + f2fs_balance_fs(sbi); + + old_entry = f2fs_find_entry(old_dir, &old_dentry->d_name, &old_page); + if (!old_entry) + goto out; + + new_entry = f2fs_find_entry(new_dir, &new_dentry->d_name, &new_page); + if (!new_entry) + goto out_old; + + /* prepare for updating ".." directory entry info later */ + if (old_dir != new_dir) { + if (S_ISDIR(old_inode->i_mode)) { + err = -EIO; + old_dir_entry = f2fs_parent_dir(old_inode, + &old_dir_page); + if (!old_dir_entry) + goto out_new; + } + + if (S_ISDIR(new_inode->i_mode)) { + err = -EIO; + new_dir_entry = f2fs_parent_dir(new_inode, + &new_dir_page); + if (!new_dir_entry) + goto out_old_dir; + } + } + + /* + * If cross rename between file and directory those are not + * in the same directory, we will inc nlink of file's parent + * later, so we should check upper boundary of its nlink. + */ + if ((!old_dir_entry || !new_dir_entry) && + old_dir_entry != new_dir_entry) { + old_nlink = old_dir_entry ? -1 : 1; + new_nlink = -old_nlink; + err = -EMLINK; + if ((old_nlink > 0 && old_inode->i_nlink >= F2FS_LINK_MAX) || + (new_nlink > 0 && new_inode->i_nlink >= F2FS_LINK_MAX)) + goto out_new_dir; + } + + f2fs_lock_op(sbi); + + err = update_dent_inode(old_inode, new_inode, &new_dentry->d_name); + if (err) + goto out_unlock; + if (file_enc_name(new_inode)) + file_set_enc_name(old_inode); + + err = update_dent_inode(new_inode, old_inode, &old_dentry->d_name); + if (err) + goto out_undo; + if (file_enc_name(old_inode)) + file_set_enc_name(new_inode); + + /* update ".." directory entry info of old dentry */ + if (old_dir_entry) + f2fs_set_link(old_inode, old_dir_entry, old_dir_page, new_dir); + + /* update ".." directory entry info of new dentry */ + if (new_dir_entry) + f2fs_set_link(new_inode, new_dir_entry, new_dir_page, old_dir); + + /* update directory entry info of old dir inode */ + f2fs_set_link(old_dir, old_entry, old_page, new_inode); + + down_write(&F2FS_I(old_inode)->i_sem); + file_lost_pino(old_inode); + up_write(&F2FS_I(old_inode)->i_sem); + + update_inode_page(old_inode); + + old_dir->i_ctime = CURRENT_TIME; + if (old_nlink) { + down_write(&F2FS_I(old_dir)->i_sem); + if (old_nlink < 0) + drop_nlink(old_dir); + else + inc_nlink(old_dir); + up_write(&F2FS_I(old_dir)->i_sem); + } + mark_inode_dirty(old_dir); + update_inode_page(old_dir); + + /* update directory entry info of new dir inode */ + f2fs_set_link(new_dir, new_entry, new_page, old_inode); + + down_write(&F2FS_I(new_inode)->i_sem); + file_lost_pino(new_inode); + up_write(&F2FS_I(new_inode)->i_sem); + + update_inode_page(new_inode); + + new_dir->i_ctime = CURRENT_TIME; + if (new_nlink) { + down_write(&F2FS_I(new_dir)->i_sem); + if (new_nlink < 0) + drop_nlink(new_dir); + else + inc_nlink(new_dir); + up_write(&F2FS_I(new_dir)->i_sem); + } + mark_inode_dirty(new_dir); + update_inode_page(new_dir); + + f2fs_unlock_op(sbi); + + if (IS_DIRSYNC(old_dir) || IS_DIRSYNC(new_dir)) + f2fs_sync_fs(sbi->sb, 1); + return 0; +out_undo: + /* + * Still we may fail to recover name info of f2fs_inode here + * Drop it, once its name is set as encrypted + */ + update_dent_inode(old_inode, old_inode, &old_dentry->d_name); +out_unlock: + f2fs_unlock_op(sbi); +out_new_dir: + if (new_dir_entry) { + f2fs_dentry_kunmap(new_inode, new_dir_page); + f2fs_put_page(new_dir_page, 0); + } +out_old_dir: + if (old_dir_entry) { + f2fs_dentry_kunmap(old_inode, old_dir_page); + f2fs_put_page(old_dir_page, 0); + } +out_new: + f2fs_dentry_kunmap(new_dir, new_page); + f2fs_put_page(new_page, 0); +out_old: + f2fs_dentry_kunmap(old_dir, old_page); + f2fs_put_page(old_page, 0); +out: + return err; +} + +static int f2fs_rename2(struct inode *old_dir, struct dentry *old_dentry, + struct inode *new_dir, struct dentry *new_dentry, + unsigned int flags) +{ + if (flags & ~(RENAME_NOREPLACE | RENAME_EXCHANGE | RENAME_WHITEOUT)) + return -EINVAL; + + if (flags & RENAME_EXCHANGE) { + return f2fs_cross_rename(old_dir, old_dentry, + new_dir, new_dentry); + } + /* + * VFS has already handled the new dentry existence case, + * here, we just deal with "RENAME_NOREPLACE" as regular rename. + */ + return f2fs_rename(old_dir, old_dentry, new_dir, new_dentry, flags); +} + +#ifdef CONFIG_F2FS_FS_ENCRYPTION +static const char *f2fs_encrypted_follow_link(struct dentry *dentry, void **cookie) +{ + struct page *cpage = NULL; + char *caddr, *paddr = NULL; + struct f2fs_str cstr; + struct f2fs_str pstr = FSTR_INIT(NULL, 0); + struct inode *inode = d_inode(dentry); + struct f2fs_encrypted_symlink_data *sd; + loff_t size = min_t(loff_t, i_size_read(inode), PAGE_SIZE - 1); + u32 max_size = inode->i_sb->s_blocksize; + int res; + + res = f2fs_get_encryption_info(inode); + if (res) + return ERR_PTR(res); + + cpage = read_mapping_page(inode->i_mapping, 0, NULL); + if (IS_ERR(cpage)) + return ERR_CAST(cpage); + caddr = kmap(cpage); + caddr[size] = 0; + + /* Symlink is encrypted */ + sd = (struct f2fs_encrypted_symlink_data *)caddr; + cstr.len = le16_to_cpu(sd->len); + cstr.name = kmalloc(cstr.len, GFP_NOFS); + if (!cstr.name) { + res = -ENOMEM; + goto errout; + } + memcpy(cstr.name, sd->encrypted_path, cstr.len); + + /* this is broken symlink case */ + if (cstr.name[0] == 0 && cstr.len == 0) { + res = -ENOENT; + goto errout; + } + + if ((cstr.len + sizeof(struct f2fs_encrypted_symlink_data) - 1) > + max_size) { + /* Symlink data on the disk is corrupted */ + res = -EIO; + goto errout; + } + res = f2fs_fname_crypto_alloc_buffer(inode, cstr.len, &pstr); + if (res) + goto errout; + + res = f2fs_fname_disk_to_usr(inode, NULL, &cstr, &pstr); + if (res < 0) + goto errout; + + kfree(cstr.name); + + paddr = pstr.name; + + /* Null-terminate the name */ + paddr[res] = '\0'; + + kunmap(cpage); + page_cache_release(cpage); + return *cookie = paddr; +errout: + kfree(cstr.name); + f2fs_fname_crypto_free_buffer(&pstr); + kunmap(cpage); + page_cache_release(cpage); + return ERR_PTR(res); +} + +const struct inode_operations f2fs_encrypted_symlink_inode_operations = { + .readlink = generic_readlink, + .follow_link = f2fs_encrypted_follow_link, + .put_link = kfree_put_link, + .getattr = f2fs_getattr, + .setattr = f2fs_setattr, + .setxattr = generic_setxattr, + .getxattr = generic_getxattr, + .listxattr = f2fs_listxattr, + .removexattr = generic_removexattr, +}; +#endif + const struct inode_operations f2fs_dir_inode_operations = { .create = f2fs_create, .lookup = f2fs_lookup, @@ -497,9 +1015,12 @@ .mkdir = f2fs_mkdir, .rmdir = f2fs_rmdir, .mknod = f2fs_mknod, - .rename = f2fs_rename, + .rename2 = f2fs_rename2, + .tmpfile = f2fs_tmpfile, + .getattr = f2fs_getattr, .setattr = f2fs_setattr, .get_acl = f2fs_get_acl, + .set_acl = f2fs_set_acl, #ifdef CONFIG_F2FS_FS_XATTR .setxattr = generic_setxattr, .getxattr = generic_getxattr, @@ -510,8 +1031,9 @@ const struct inode_operations f2fs_symlink_inode_operations = { .readlink = generic_readlink, - .follow_link = page_follow_link_light, + .follow_link = f2fs_follow_link, .put_link = page_put_link, + .getattr = f2fs_getattr, .setattr = f2fs_setattr, #ifdef CONFIG_F2FS_FS_XATTR .setxattr = generic_setxattr, @@ -522,8 +1044,10 @@ }; const struct inode_operations f2fs_special_inode_operations = { + .getattr = f2fs_getattr, .setattr = f2fs_setattr, .get_acl = f2fs_get_acl, + .set_acl = f2fs_set_acl, #ifdef CONFIG_F2FS_FS_XATTR .setxattr = generic_setxattr, .getxattr = generic_getxattr,