From patchwork Sat Mar 10 18:17:45 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andiry Xu X-Patchwork-Id: 10273807 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 28348601A0 for ; Sat, 10 Mar 2018 18:20:31 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1299629735 for ; Sat, 10 Mar 2018 18:20:31 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 0C4C529106; Sat, 10 Mar 2018 18:20:31 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-1.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_NONE,T_DKIM_INVALID autolearn=no version=3.3.1 Received: from ml01.01.org (ml01.01.org [198.145.21.10]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id D5BA529960 for ; Sat, 10 Mar 2018 18:20:29 +0000 (UTC) Received: from [127.0.0.1] (localhost [IPv6:::1]) by ml01.01.org (Postfix) with ESMTP id A84DA2258AEE6; Sat, 10 Mar 2018 10:14:04 -0800 (PST) X-Original-To: linux-nvdimm@lists.01.org Delivered-To: linux-nvdimm@lists.01.org Received-SPF: Pass (sender SPF authorized) identity=mailfrom; client-ip=2607:f8b0:400e:c05::241; helo=mail-pg0-x241.google.com; envelope-from=jix024@eng.ucsd.edu; receiver=linux-nvdimm@lists.01.org Received: from mail-pg0-x241.google.com (mail-pg0-x241.google.com [IPv6:2607:f8b0:400e:c05::241]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id A004A220C2A5E for ; Sat, 10 Mar 2018 10:14:01 -0800 (PST) Received: by mail-pg0-x241.google.com with SMTP id l4so4831433pgp.11 for ; Sat, 10 Mar 2018 10:20:20 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=eng.ucsd.edu; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references; bh=jNciQNYhV/VSLOizUkdnViiqXMlMLrr9PeqYVej0eXI=; b=VDmhH3IzIqtOrfgJ/+9nIPPtoGxwSgMebRG4TbcG7k+Q+F0AELAVQnJV0HlYhIyZeK jkZ2TuRoPEjPb0HtZJdHTBcSWI86ordtMxwgl1xZpvuLIEgnLNKq18CS28Q7MzDiH7L/ Q70BLc78pjWXvk/R2oo0C+Ils4h9dwkw/jXfc= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references; bh=jNciQNYhV/VSLOizUkdnViiqXMlMLrr9PeqYVej0eXI=; b=MSurfDvFt3s80ldVWdzrKvWIrtsu2tXCJwhB8Gs9odU7Z7mnK9qKdokGkd9GbU/r3G 0lGZiLxLmZ3YzM7OMGfXHXKW8/3jH1rev6Z2vsLZNr9dh8VD41ZBvJdGIOYd51yDYh19 n+f7Ji0g+eGgpN47HVHCUbGBY2q9eAecB0Srriz5GlaJS/TScxIhh8wmpqjhwyArLnBW g2IttJAw++msFH7xEnVmQauhbaBBfpwg96xDK90WCsVeQkRb8DhldQ9MFdJeYGEI4mHR HtR2UIsvqdFjplMwPLSjq6JZjCkd3aifwQPc9c9JslyVSuFJkKA5Bd/UNbhMSppOtCcx zEaA== X-Gm-Message-State: AElRT7GHAxg7qBHZYK721gwOmgqjCI0JMcZdB6Q9zlgmM5juKouOTVwQ GM6WSqsb0kH0EIUov1w7UnAHaw== X-Google-Smtp-Source: AG47ELsiLHxpLybAKtPMAuI/8uQ6f1LpJ8J0MSJt96LEo6TshyZKLrbt3LWM4SIgue0UFusuUmcn6w== X-Received: by 10.98.238.2 with SMTP id e2mr2684965pfi.68.1520706020033; Sat, 10 Mar 2018 10:20:20 -0800 (PST) Received: from brienza-desktop.8.8.4.4 (andxu.ucsd.edu. [132.239.17.134]) by smtp.gmail.com with ESMTPSA id h80sm9210167pfj.181.2018.03.10.10.20.18 (version=TLS1_2 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Sat, 10 Mar 2018 10:20:19 -0800 (PST) From: Andiry Xu To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org Subject: [RFC v2 04/83] NOVA inode definition. Date: Sat, 10 Mar 2018 10:17:45 -0800 Message-Id: <1520705944-6723-5-git-send-email-jix024@eng.ucsd.edu> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1520705944-6723-1-git-send-email-jix024@eng.ucsd.edu> References: <1520705944-6723-1-git-send-email-jix024@eng.ucsd.edu> X-BeenThere: linux-nvdimm@lists.01.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "Linux-nvdimm developer list." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: coughlan@redhat.com, miklos@szeredi.hu, Andiry Xu , david@fromorbit.com, jack@suse.com, swanson@cs.ucsd.edu, swhiteho@redhat.com, andiry.xu@gmail.com MIME-Version: 1.0 Errors-To: linux-nvdimm-bounces@lists.01.org Sender: "Linux-nvdimm" X-Virus-Scanned: ClamAV using ClamSMTP From: Andiry Xu inode.h defines the non-volatile and volatile NOVA inode data structures. The non-volatile NOVA inode (nova_inode) is aligned to 128 bytes and contains file/directory metadata information. The most important fields are log_head and log_tail. log_head points to the start of the log, and log_tail points to the end of the latest committed log entry. NOVA make updates to the inode by appending to the log tail and update the log_tail pointer atomically. The volatile NOVA inode (nova_inode_info) contains necessary information to limit access to the non-volatile NOVA inode during runtime. It has a radix tree to map file offset or filenames to the corresponding log entries. Signed-off-by: Andiry Xu --- fs/nova/inode.h | 187 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 187 insertions(+) create mode 100644 fs/nova/inode.h diff --git a/fs/nova/inode.h b/fs/nova/inode.h new file mode 100644 index 0000000..f9187e3 --- /dev/null +++ b/fs/nova/inode.h @@ -0,0 +1,187 @@ +#ifndef __INODE_H +#define __INODE_H + +struct nova_inode_info_header; +struct nova_inode; + +#include "super.h" + +enum nova_new_inode_type { + TYPE_CREATE = 0, + TYPE_MKNOD, + TYPE_SYMLINK, + TYPE_MKDIR +}; + + +/* + * Structure of an inode in PMEM + * Keep the inode size to within 120 bytes: We use the last eight bytes + * as inode table tail pointer. + */ +struct nova_inode { + + /* first 40 bytes */ + u8 i_rsvd; /* reserved. used to be checksum */ + u8 valid; /* Is this inode valid? */ + u8 deleted; /* Is this inode deleted? */ + u8 i_blk_type; /* data block size this inode uses */ + __le32 i_flags; /* Inode flags */ + __le64 i_size; /* Size of data in bytes */ + __le32 i_ctime; /* Inode modification time */ + __le32 i_mtime; /* Inode b-tree Modification time */ + __le32 i_atime; /* Access time */ + __le16 i_mode; /* File mode */ + __le16 i_links_count; /* Links count */ + + __le64 i_xattr; /* Extended attribute block */ + + /* second 40 bytes */ + __le32 i_uid; /* Owner Uid */ + __le32 i_gid; /* Group Id */ + __le32 i_generation; /* File version (for NFS) */ + __le32 i_create_time; /* Create time */ + __le64 nova_ino; /* nova inode number */ + + __le64 log_head; /* Log head pointer */ + __le64 log_tail; /* Log tail pointer */ + + /* last 40 bytes */ + __le64 create_epoch_id; /* Transaction ID when create */ + __le64 delete_epoch_id; /* Transaction ID when deleted */ + + struct { + __le32 rdev; /* major/minor # */ + } dev; /* device inode */ + + __le32 csum; /* CRC32 checksum */ + + /* Leave 8 bytes for inode table tail pointer */ +} __attribute((__packed__)); + +/* + * NOVA-specific inode state kept in DRAM + */ +struct nova_inode_info_header { + /* For files, tree holds a map from file offsets to + * write log entries. + * + * For directories, tree holds a map from a hash of the file name to + * dentry log entry. + */ + struct radix_tree_root tree; + struct rw_semaphore i_sem; /* Protect log and tree */ + unsigned short i_mode; /* Dir or file? */ + unsigned int i_flags; + unsigned long log_pages; /* Num of log pages */ + unsigned long i_size; + unsigned long i_blocks; + unsigned long ino; + unsigned long pi_addr; + unsigned long valid_entries; /* For thorough GC */ + unsigned long num_entries; /* For thorough GC */ + u64 last_setattr; /* Last setattr entry */ + u64 last_link_change; /* Last link change entry */ + u64 last_dentry; /* Last updated dentry */ + u64 trans_id; /* Transaction ID */ + u64 log_head; /* Log head pointer */ + u64 log_tail; /* Log tail pointer */ + u8 i_blk_type; +}; + +/* + * DRAM state for inodes + */ +struct nova_inode_info { + struct nova_inode_info_header header; + struct inode vfs_inode; +}; + + +static inline struct nova_inode_info *NOVA_I(struct inode *inode) +{ + return container_of(inode, struct nova_inode_info, vfs_inode); +} + +static inline void sih_lock(struct nova_inode_info_header *header) +{ + down_write(&header->i_sem); +} + +static inline void sih_unlock(struct nova_inode_info_header *header) +{ + up_write(&header->i_sem); +} + +static inline void sih_lock_shared(struct nova_inode_info_header *header) +{ + down_read(&header->i_sem); +} + +static inline void sih_unlock_shared(struct nova_inode_info_header *header) +{ + up_read(&header->i_sem); +} + +static inline unsigned int +nova_inode_blk_shift(struct nova_inode_info_header *sih) +{ + return blk_type_to_shift[sih->i_blk_type]; +} + +static inline uint32_t nova_inode_blk_size(struct nova_inode_info_header *sih) +{ + return blk_type_to_size[sih->i_blk_type]; +} + +static inline u64 nova_get_reserved_inode_addr(struct super_block *sb, + u64 inode_number) +{ + return (NOVA_DEF_BLOCK_SIZE_4K * RESERVE_INODE_START) + + inode_number * NOVA_INODE_SIZE; +} + +static inline struct nova_inode *nova_get_reserved_inode(struct super_block *sb, + u64 inode_number) +{ + struct nova_sb_info *sbi = NOVA_SB(sb); + u64 addr; + + addr = nova_get_reserved_inode_addr(sb, inode_number); + + return (struct nova_inode *)(sbi->virt_addr + addr); +} + +static inline struct nova_inode *nova_get_inode_by_ino(struct super_block *sb, + u64 ino) +{ + if (ino == 0 || ino >= NOVA_NORMAL_INODE_START) + return NULL; + + return nova_get_reserved_inode(sb, ino); +} + +static inline struct nova_inode *nova_get_inode(struct super_block *sb, + struct inode *inode) +{ + struct nova_inode_info *si = NOVA_I(inode); + struct nova_inode_info_header *sih = &si->header; + struct nova_inode fake_pi; + void *addr; + int rc; + + addr = nova_get_block(sb, sih->pi_addr); + rc = memcpy_mcsafe(&fake_pi, addr, sizeof(struct nova_inode)); + if (rc) + return NULL; + + return (struct nova_inode *)addr; +} + +static inline int nova_persist_inode(struct nova_inode *pi) +{ + nova_flush_buffer(pi, sizeof(struct nova_inode), 1); + return 0; +} + +#endif