From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pf0-x242.google.com (mail-pf0-x242.google.com [IPv6:2607:f8b0:400e:c00::242]) (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 2DDB72258AEE0 for ; Sat, 10 Mar 2018 10:14:04 -0800 (PST) Received: by mail-pf0-x242.google.com with SMTP id d26so2619762pfn.5 for ; Sat, 10 Mar 2018 10:20:22 -0800 (PST) From: Andiry Xu Subject: [RFC v2 06/83] Add inode get/read methods. Date: Sat, 10 Mar 2018 10:17:47 -0800 Message-Id: <1520705944-6723-7-git-send-email-jix024@eng.ucsd.edu> In-Reply-To: <1520705944-6723-1-git-send-email-jix024@eng.ucsd.edu> References: <1520705944-6723-1-git-send-email-jix024@eng.ucsd.edu> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: linux-nvdimm-bounces@lists.01.org Sender: "Linux-nvdimm" To: linux-fsdevel@vger.kernel.org, linux-kernel@vger.kernel.org, linux-nvdimm@lists.01.org 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 List-ID: From: Andiry Xu These routines are incomplete and currently only support reserved inodes, whose addresses are fixed. This is necessary for fill_super to work. File/dir operations are left NULL. Signed-off-by: Andiry Xu --- fs/nova/inode.c | 176 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ fs/nova/inode.h | 3 + 2 files changed, 179 insertions(+) create mode 100644 fs/nova/inode.c diff --git a/fs/nova/inode.c b/fs/nova/inode.c new file mode 100644 index 0000000..bfdc5dc --- /dev/null +++ b/fs/nova/inode.c @@ -0,0 +1,176 @@ +/* + * BRIEF DESCRIPTION + * + * Inode methods (allocate/free/read/write). + * + * Copyright 2015-2016 Regents of the University of California, + * UCSD Non-Volatile Systems Lab, Andiry Xu + * Copyright 2012-2013 Intel Corporation + * Copyright 2009-2011 Marco Stornelli + * Copyright 2003 Sony Corporation + * Copyright 2003 Matsushita Electric Industrial Co., Ltd. + * 2003-2004 (c) MontaVista Software, Inc. , Steve Longerbeam + * This file is licensed under the terms of the GNU General Public + * License version 2. This program is licensed "as is" without any + * warranty of any kind, whether express or implied. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include "nova.h" +#include "inode.h" + +unsigned int blk_type_to_shift[NOVA_BLOCK_TYPE_MAX] = {12, 21, 30}; +uint32_t blk_type_to_size[NOVA_BLOCK_TYPE_MAX] = {0x1000, 0x200000, 0x40000000}; + +void nova_set_inode_flags(struct inode *inode, struct nova_inode *pi, + unsigned int 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; + if (!pi->i_xattr) + inode_has_no_xattr(inode); + inode->i_flags |= S_DAX; +} + +/* copy persistent state to struct inode */ +static int nova_read_inode(struct super_block *sb, struct inode *inode, + u64 pi_addr) +{ + struct nova_inode_info *si = NOVA_I(inode); + struct nova_inode *pi, fake_pi; + struct nova_inode_info_header *sih = &si->header; + int ret = -EIO; + unsigned long ino; + + ret = nova_get_reference(sb, pi_addr, &fake_pi, + (void **)&pi, sizeof(struct nova_inode)); + if (ret) { + nova_dbg("%s: read pi @ 0x%llx failed\n", + __func__, pi_addr); + goto bad_inode; + } + + inode->i_mode = sih->i_mode; + i_uid_write(inode, le32_to_cpu(pi->i_uid)); + i_gid_write(inode, le32_to_cpu(pi->i_gid)); +// set_nlink(inode, le16_to_cpu(pi->i_links_count)); + inode->i_generation = le32_to_cpu(pi->i_generation); + nova_set_inode_flags(inode, pi, le32_to_cpu(pi->i_flags)); + ino = inode->i_ino; + + /* check if the inode is active. */ + if (inode->i_mode == 0 || pi->deleted == 1) { + /* this inode is deleted */ + ret = -ESTALE; + goto bad_inode; + } + + inode->i_blocks = sih->i_blocks; + + switch (inode->i_mode & S_IFMT) { + case S_IFREG: + break; + case S_IFDIR: + break; + case S_IFLNK: + break; + default: + init_special_inode(inode, inode->i_mode, + le32_to_cpu(pi->dev.rdev)); + break; + } + + /* Update size and time after rebuild the tree */ + inode->i_size = le64_to_cpu(sih->i_size); + inode->i_atime.tv_sec = (__s32)le32_to_cpu(pi->i_atime); + inode->i_ctime.tv_sec = (__s32)le32_to_cpu(pi->i_ctime); + inode->i_mtime.tv_sec = (__s32)le32_to_cpu(pi->i_mtime); + inode->i_atime.tv_nsec = inode->i_mtime.tv_nsec = + inode->i_ctime.tv_nsec = 0; + set_nlink(inode, le16_to_cpu(pi->i_links_count)); + return 0; + +bad_inode: + make_bad_inode(inode); + return ret; +} + +/* Get the address in PMEM of an inode by inode number. Allocate additional + * block to store additional inodes if necessary. + */ +int nova_get_inode_address(struct super_block *sb, u64 ino, + u64 *pi_addr, int extendable) +{ + if (ino < NOVA_NORMAL_INODE_START) { + *pi_addr = nova_get_reserved_inode_addr(sb, ino); + return 0; + } + + *pi_addr = 0; + return 0; +} + +struct inode *nova_iget(struct super_block *sb, unsigned long ino) +{ + struct nova_inode_info *si; + struct inode *inode; + u64 pi_addr; + int err; + + inode = iget_locked(sb, ino); + if (unlikely(!inode)) + return ERR_PTR(-ENOMEM); + if (!(inode->i_state & I_NEW)) + return inode; + + si = NOVA_I(inode); + + nova_dbgv("%s: inode %lu\n", __func__, ino); + + err = nova_get_inode_address(sb, ino, &pi_addr, 0); + if (err) { + nova_dbg("%s: get inode %lu address failed %d\n", + __func__, ino, err); + goto fail; + } + + if (pi_addr == 0) { + nova_dbg("%s: failed to get pi_addr for inode %lu\n", + __func__, ino); + err = -EACCES; + goto fail; + } + + err = nova_read_inode(sb, inode, pi_addr); + if (unlikely(err)) { + nova_dbg("%s: failed to read inode %lu\n", __func__, ino); + goto fail; + + } + + inode->i_ino = ino; + + unlock_new_inode(inode); + return inode; +fail: + iget_failed(inode); + return ERR_PTR(err); +} + diff --git a/fs/nova/inode.h b/fs/nova/inode.h index f9187e3..dbd5256 100644 --- a/fs/nova/inode.h +++ b/fs/nova/inode.h @@ -184,4 +184,7 @@ static inline int nova_persist_inode(struct nova_inode *pi) return 0; } +int nova_get_inode_address(struct super_block *sb, u64 ino, + u64 *pi_addr, int extendable); +struct inode *nova_iget(struct super_block *sb, unsigned long ino); #endif -- 2.7.4 _______________________________________________ Linux-nvdimm mailing list Linux-nvdimm@lists.01.org https://lists.01.org/mailman/listinfo/linux-nvdimm