2024-07-09 20:57:16 +02:00
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/****************************************************************************
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* fs/mnemofs/mnemofs_journal.c
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* Journal of mnemofs.
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership. The
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* ASF licenses this file to you under the Apache License, Version 2.0 (the
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* "License"); you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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* License for the specific language governing permissions and limitations
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* under the License.
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*
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* Alternatively, the contents of this file may be used under the terms of
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* the BSD-3-Clause license:
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 2024 Saurav Pal
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the author nor the names of its contributors may
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* be used to endorse or promote products derived from this software
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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****************************************************************************/
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/****************************************************************************
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* In mnemofs, the journal stores the path, depth and the new location of the
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* CTZ file called logs, and also the location of the master block. The first
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* n blocks of the journal store the logs, while the last two blocks contain
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* master nodes, and the blocks are called as master blocks. The two master
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* blocks are identical copies for backup.
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*
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* Due to LRU, and the structure of mnemofs, the first n blocks of the
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* journal get filled up much faster than the master blocks, and move more.
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* There will be certain point where the entire journal (the n+2 blocks)
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* move, but mostly, its the first n blocks that move.
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*
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* The first block starts with an 8 byte magic sequence, a 2 bytes long
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* number denoting number of blocks in the journal, and then follows up
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* with an array containing the block numbers of all blocks in the journal
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* including the first block. Then the logs start.
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*
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* The logs take up size in multiples of pages. There might be unitilzed
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* space at the end of a log.
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*
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* All logs are followed by a byte-long hash of the log.
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****************************************************************************/
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/****************************************************************************
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* Included Files
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****************************************************************************/
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#include <endian.h>
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#include <nuttx/kmalloc.h>
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#include <nuttx/list.h>
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#include <sys/param.h>
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#include "mnemofs.h"
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/****************************************************************************
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* Pre-processor Definitions
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****************************************************************************/
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2024-08-08 18:38:56 +02:00
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#define MFS_JRNL_SUFFIXSZ (8 + 2) /* 8 byte magic sequence + no. of blks */
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#define MFS_LOGSZ(depth) (sizeof(mfs_t) * 2 + sizeof(struct mfs_ctz_s) + \
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sizeof(struct mfs_path_s) * depth + \
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sizeof(struct timespec) * 3 + sizeof(uint16_t))
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2024-07-09 20:57:16 +02:00
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/****************************************************************************
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* Private Types
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****************************************************************************/
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2024-07-13 14:10:47 +02:00
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/* NOTE: Even if higher level functions use path as struct mfs_path_s,
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* journal only uses struct mfs_ctz_s to avoid problems during write and
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* read of logs. The offsets in struct mfs_path_s will be applied by the
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* search methods of higher functions.
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*/
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2024-07-09 20:57:16 +02:00
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/****************************************************************************
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* Private Function Prototypes
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****************************************************************************/
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2024-08-08 18:38:56 +02:00
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FAR static const char *deser_log(FAR const char * const in,
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2024-08-17 22:21:32 +02:00
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FAR struct mfs_jrnl_log_s * const x);
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FAR static char *ser_log(FAR const struct mfs_jrnl_log_s * const x,
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2024-08-08 18:38:56 +02:00
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FAR char * const out);
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2024-07-13 14:10:47 +02:00
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2024-07-09 20:57:16 +02:00
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/****************************************************************************
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* Private Data
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****************************************************************************/
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/****************************************************************************
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* Public Data
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****************************************************************************/
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/****************************************************************************
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* Private Functions
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****************************************************************************/
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2024-07-13 14:10:47 +02:00
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/****************************************************************************
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2024-08-17 22:21:32 +02:00
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* Name: mfs_jrnl_rdlog
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2024-07-13 14:10:47 +02:00
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*
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* Description:
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2024-08-08 18:38:56 +02:00
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* Read a log to the journal from given location, and update location to
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* point to next log location.
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2024-07-13 14:10:47 +02:00
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*
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* Input Parameters:
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2024-08-08 18:38:56 +02:00
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* sb - Superblock instance of the device.
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* blkidx - Journal Block Index of the current block.
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* pg_in_blk - Page offset in the block.
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* log - To populate with the log.
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2024-07-13 14:10:47 +02:00
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*
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* Returned Value:
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* 0 - OK
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* < 0 - Error
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*
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* Assumptions/Limitations:
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2024-08-08 18:38:56 +02:00
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* This function does NOT care about start of the journal, or even, if
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* the initial requested area is inside the journal. It will malfunction
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* if not used properly. Usually this is used in an iterative manner, and
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* hence the first time blkidx and pg_in_blk are initialized, they should
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* be derived from the values in MFS_JRNL(sb) respectively.
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*
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* This updates the blkidx and pg_in_blk to point to the next log, and
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* returns an -ENOSPC when end of journal is reached in traversal.
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*
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* Free the log after use.
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2024-07-13 14:10:47 +02:00
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*
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****************************************************************************/
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2024-08-17 22:21:32 +02:00
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int mfs_jrnl_rdlog(FAR const struct mfs_sb_s *const sb,
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2024-08-08 18:38:56 +02:00
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FAR mfs_t *blkidx, FAR mfs_t *pg_in_blk,
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2024-08-17 22:21:32 +02:00
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FAR struct mfs_jrnl_log_s *log)
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2024-07-13 14:10:47 +02:00
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{
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2024-08-08 18:38:56 +02:00
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int ret = OK;
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char tmp[4];
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mfs_t log_sz;
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mfs_t jrnl_pg;
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mfs_t jrnl_blk;
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FAR char *buf = NULL;
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2024-07-13 14:10:47 +02:00
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2024-08-08 18:38:56 +02:00
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DEBUGASSERT(*pg_in_blk % MFS_PGSZ(sb) == 0);
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2024-07-13 14:10:47 +02:00
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2024-08-08 18:38:56 +02:00
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jrnl_blk = mfs_jrnl_blkidx2blk(sb, *blkidx);
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jrnl_pg = MFS_BLK2PG(sb, jrnl_blk) + *pg_in_blk;
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2024-07-13 14:10:47 +02:00
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2024-08-08 18:38:56 +02:00
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/* First 4 bytes contain the size of the entire log. */
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ret = mfs_read_page(sb, tmp, 4, jrnl_pg, 0);
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if (predict_false(ret < 0))
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2024-07-13 14:10:47 +02:00
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{
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goto errout;
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}
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2024-08-08 18:38:56 +02:00
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mfs_deser_mfs(tmp, &log_sz);
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2024-08-17 22:21:32 +02:00
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if (log_sz == 0)
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{
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ret = -ENOSPC;
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goto errout;
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}
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2024-08-08 18:38:56 +02:00
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buf = kmm_zalloc(log_sz);
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if (predict_false(buf == NULL))
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2024-07-13 14:10:47 +02:00
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{
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2024-08-08 18:38:56 +02:00
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ret = -ENOMEM;
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goto errout;
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2024-07-13 14:10:47 +02:00
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}
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2024-08-17 22:21:32 +02:00
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ret = mfs_read_page(sb, buf, log_sz, jrnl_pg, 4);
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if (predict_false(ret < 0))
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2024-08-08 18:38:56 +02:00
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{
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2024-08-17 22:21:32 +02:00
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goto errout_with_buf;
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2024-08-08 18:38:56 +02:00
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}
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2024-07-13 14:10:47 +02:00
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2024-08-17 22:21:32 +02:00
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ret = OK;
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2024-08-08 18:38:56 +02:00
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if (predict_false(deser_log(buf, log) == NULL))
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{
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ret = -ENOMEM;
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goto errout_with_buf;
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2024-07-13 14:10:47 +02:00
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}
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2024-08-17 22:21:32 +02:00
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(*pg_in_blk)++;
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2024-08-08 18:38:56 +02:00
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2024-08-17 22:21:32 +02:00
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if (*pg_in_blk >= MFS_PGINBLK(sb))
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{
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*pg_in_blk = 0;
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(*blkidx)++;
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}
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2024-07-13 14:10:47 +02:00
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errout_with_buf:
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kmm_free(buf);
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errout:
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return ret;
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}
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/****************************************************************************
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2024-08-08 18:38:56 +02:00
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* Name: ser_log
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2024-07-13 14:10:47 +02:00
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*
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* Description:
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2024-08-08 18:38:56 +02:00
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* Serialize a log.
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2024-07-13 14:10:47 +02:00
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*
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* Input Parameters:
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2024-08-08 18:38:56 +02:00
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* n - Log to serialize
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* out - Output array where to serialize.
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2024-07-13 14:10:47 +02:00
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*
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* Returned Value:
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2024-08-08 18:38:56 +02:00
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* Pointer to byte after the end of serialized value.
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2024-07-13 14:10:47 +02:00
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*
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* Assumptions/Limitations:
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2024-08-08 18:38:56 +02:00
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* This assumes the out buffer has enough space to hold the inline path.
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2024-07-13 14:10:47 +02:00
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*
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2024-08-08 18:38:56 +02:00
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* This doesn't require the hash to be pre-calculated.
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2024-07-13 14:10:47 +02:00
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*
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****************************************************************************/
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2024-08-17 22:21:32 +02:00
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FAR static char *ser_log(FAR const struct mfs_jrnl_log_s * const x,
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2024-08-08 18:38:56 +02:00
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FAR char * const out)
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2024-07-13 14:10:47 +02:00
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{
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2024-08-08 18:38:56 +02:00
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char *o = out;
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mfs_t i = 0;
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2024-07-13 14:10:47 +02:00
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2024-08-08 18:38:56 +02:00
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o = mfs_ser_mfs(x->depth, o);
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o = mfs_ser_mfs(x->sz_new, o);
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o = mfs_ser_ctz(&x->loc_new, o);
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o = mfs_ser_timespec(&x->st_mtim_new, o);
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o = mfs_ser_timespec(&x->st_atim_new, o);
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o = mfs_ser_timespec(&x->st_ctim_new, o);
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2024-07-13 14:10:47 +02:00
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2024-08-08 18:38:56 +02:00
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for (i = 0; i < x->depth; i++)
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2024-07-13 14:10:47 +02:00
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{
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2024-08-08 18:38:56 +02:00
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o = mfs_ser_path(&x->path[i], o);
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}
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2024-07-13 14:10:47 +02:00
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2024-08-08 18:38:56 +02:00
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o = mfs_ser_16(mfs_hash(out, o - out), o);
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return o;
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}
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2024-07-13 14:10:47 +02:00
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2024-08-08 18:38:56 +02:00
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/****************************************************************************
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* Name: deser_log
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*
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* Description:
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* Deserialize a log.
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*
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* Input Parameters:
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* in - Input array from where to deserialize.
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* n - Log to deserialize
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*
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* Returned Value:
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* NULL - Error.
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* Pointer to byte after the end of serialized value.
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*
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* Assumptions/Limitations:
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* This allocates space for the path, and the log should freed after use.
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*
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****************************************************************************/
|
2024-07-13 14:10:47 +02:00
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|
2024-08-08 18:38:56 +02:00
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FAR static const char *deser_log(FAR const char * const in,
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2024-08-17 22:21:32 +02:00
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FAR struct mfs_jrnl_log_s * const x)
|
2024-08-08 18:38:56 +02:00
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{
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mfs_t k = 0;
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const char *i = in;
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2024-07-13 14:10:47 +02:00
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2024-08-08 18:38:56 +02:00
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i = mfs_deser_mfs(i, &x->depth);
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i = mfs_deser_mfs(i, &x->sz_new);
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i = mfs_deser_ctz(i, &x->loc_new);
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i = mfs_deser_timespec(i, &x->st_mtim_new);
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i = mfs_deser_timespec(i, &x->st_atim_new);
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i = mfs_deser_timespec(i, &x->st_ctim_new);
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2024-07-13 14:10:47 +02:00
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2024-08-08 18:38:56 +02:00
|
|
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/* Allocates path. Deallocate using mfs_jrnl_log_free. */
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2024-07-13 14:10:47 +02:00
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|
2024-08-17 22:21:32 +02:00
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x->path = kmm_zalloc(sizeof(struct mfs_jrnl_log_s) * x->depth);
|
2024-08-08 18:38:56 +02:00
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if (predict_false(x->path == NULL))
|
2024-07-13 14:10:47 +02:00
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{
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2024-08-08 18:38:56 +02:00
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return NULL;
|
2024-07-13 14:10:47 +02:00
|
|
|
}
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|
2024-08-08 18:38:56 +02:00
|
|
|
for (k = 0; k < x->depth; k++)
|
2024-07-13 14:10:47 +02:00
|
|
|
{
|
2024-08-08 18:38:56 +02:00
|
|
|
i = mfs_deser_path(i, &x->path[k]);
|
2024-07-13 14:10:47 +02:00
|
|
|
}
|
|
|
|
|
2024-08-08 18:38:56 +02:00
|
|
|
i = mfs_deser_16(i, &x->hash);
|
|
|
|
return i;
|
2024-07-13 14:10:47 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
/****************************************************************************
|
2024-08-17 22:21:32 +02:00
|
|
|
* Name: mfs_jrnl_log_free
|
2024-07-13 14:10:47 +02:00
|
|
|
*
|
|
|
|
* Description:
|
2024-08-08 18:38:56 +02:00
|
|
|
* Free the log.
|
2024-07-13 14:10:47 +02:00
|
|
|
*
|
|
|
|
* Input Parameters:
|
2024-08-08 18:38:56 +02:00
|
|
|
* log - Log
|
|
|
|
*
|
|
|
|
* Assumptions/Limitations:
|
|
|
|
* This allocates space for the path, and the log should freed after use.
|
2024-07-13 14:10:47 +02:00
|
|
|
*
|
|
|
|
****************************************************************************/
|
|
|
|
|
2024-08-17 22:21:32 +02:00
|
|
|
void mfs_jrnl_log_free(FAR const struct mfs_jrnl_log_s * const log)
|
2024-07-13 14:10:47 +02:00
|
|
|
{
|
2024-08-08 18:38:56 +02:00
|
|
|
free(log->path);
|
2024-07-13 14:10:47 +02:00
|
|
|
}
|
|
|
|
|
2024-07-09 20:57:16 +02:00
|
|
|
/****************************************************************************
|
|
|
|
* Public Functions
|
|
|
|
****************************************************************************/
|
|
|
|
|
|
|
|
int mfs_jrnl_init(FAR struct mfs_sb_s * const sb, mfs_t blk)
|
|
|
|
{
|
2024-08-17 22:21:32 +02:00
|
|
|
char buftmp[2];
|
|
|
|
int ret = OK;
|
|
|
|
mfs_t sz;
|
|
|
|
mfs_t blkidx;
|
|
|
|
mfs_t pg_in_blk;
|
|
|
|
struct mfs_jrnl_log_s log;
|
2024-07-13 14:10:47 +02:00
|
|
|
|
|
|
|
/* Magic sequence is already used to find the block, so not required. */
|
|
|
|
|
|
|
|
mfs_read_page(sb, buftmp, 2, MFS_BLK2PG(sb, blk), 8);
|
2024-08-17 22:21:32 +02:00
|
|
|
mfs_deser_16(buftmp, &MFS_JRNL(sb).n_blks);
|
2024-07-13 14:10:47 +02:00
|
|
|
|
|
|
|
if (MFS_JRNL(sb).n_blks == 0)
|
|
|
|
{
|
|
|
|
ret = -EINVAL;
|
|
|
|
goto errout;
|
|
|
|
}
|
|
|
|
|
2024-08-08 18:38:56 +02:00
|
|
|
sz = MFS_JRNL_SUFFIXSZ + ((CONFIG_MNEMOFS_JOURNAL_NBLKS + 2) * 4);
|
2024-07-13 14:10:47 +02:00
|
|
|
|
2024-08-17 22:21:32 +02:00
|
|
|
MFS_JRNL(sb).jrnl_start = blk;
|
2024-08-08 18:38:56 +02:00
|
|
|
MFS_JRNL(sb).log_cpg = (sz + (MFS_PGSZ(sb) - 1)) / MFS_PGSZ(sb);
|
2024-07-13 14:10:47 +02:00
|
|
|
MFS_JRNL(sb).log_spg = MFS_JRNL(sb).log_cpg;
|
2024-08-08 18:38:56 +02:00
|
|
|
MFS_JRNL(sb).log_cblkidx = 0;
|
2024-07-13 14:10:47 +02:00
|
|
|
MFS_JRNL(sb).log_sblkidx = MFS_JRNL(sb).log_cblkidx;
|
2024-08-17 22:21:32 +02:00
|
|
|
MFS_JRNL(sb).jrnlarr_pg = MFS_BLK2PG(sb, blk); /* Assuming pgsz > 10 */
|
2024-08-08 18:38:56 +02:00
|
|
|
MFS_JRNL(sb).jrnlarr_pgoff = MFS_JRNL_SUFFIXSZ;
|
2024-07-13 14:10:47 +02:00
|
|
|
|
|
|
|
/* Number of logs */
|
|
|
|
|
|
|
|
MFS_JRNL(sb).n_logs = 0;
|
2024-08-08 18:38:56 +02:00
|
|
|
blkidx = MFS_JRNL(sb).log_sblkidx;
|
|
|
|
pg_in_blk = MFS_JRNL(sb).log_spg % MFS_PGINBLK(sb);
|
|
|
|
|
|
|
|
while (true)
|
2024-07-13 14:10:47 +02:00
|
|
|
{
|
2024-08-17 22:21:32 +02:00
|
|
|
ret = mfs_jrnl_rdlog(sb, &blkidx, &pg_in_blk, &log);
|
2024-08-08 18:38:56 +02:00
|
|
|
if (predict_false(ret < 0 && ret != -ENOSPC))
|
|
|
|
{
|
|
|
|
goto errout;
|
|
|
|
}
|
|
|
|
else if (ret == -ENOSPC)
|
|
|
|
{
|
|
|
|
ret = OK;
|
|
|
|
break;
|
|
|
|
}
|
2024-07-13 14:10:47 +02:00
|
|
|
|
2024-08-08 18:38:56 +02:00
|
|
|
/* Assumes checking the depth is enough to check if it's empty, as
|
|
|
|
* theoretically there are no blocks with depth 0, as root has a
|
|
|
|
* depth of 1.
|
|
|
|
*/
|
2024-07-09 20:57:16 +02:00
|
|
|
|
2024-08-17 22:21:32 +02:00
|
|
|
if (log.depth == 0)
|
2024-07-13 14:10:47 +02:00
|
|
|
{
|
2024-08-17 22:21:32 +02:00
|
|
|
DEBUGASSERT(log.path == NULL);
|
2024-07-13 14:10:47 +02:00
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
MFS_JRNL(sb).n_logs++;
|
2024-08-17 22:21:32 +02:00
|
|
|
mfs_jrnl_log_free(&log);
|
2024-07-13 14:10:47 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
/* Master node */
|
|
|
|
|
|
|
|
MFS_JRNL(sb).mblk1 = mfs_jrnl_blkidx2blk(sb, MFS_JRNL(sb).n_blks);
|
|
|
|
MFS_JRNL(sb).mblk2 = mfs_jrnl_blkidx2blk(sb, MFS_JRNL(sb).n_blks + 1);
|
|
|
|
|
|
|
|
/* TODO: Read all pages in master blocks to find the last master node
|
|
|
|
* update.
|
|
|
|
*/
|
|
|
|
|
|
|
|
errout:
|
|
|
|
return ret;
|
2024-07-09 20:57:16 +02:00
|
|
|
}
|
|
|
|
|
2024-08-17 08:40:07 +02:00
|
|
|
int mfs_jrnl_fmt(FAR struct mfs_sb_s * const sb, FAR mfs_t *blk1,
|
|
|
|
FAR mfs_t *blk2, FAR mfs_t *jrnl_blk)
|
2024-07-09 20:57:16 +02:00
|
|
|
{
|
2024-08-17 22:21:32 +02:00
|
|
|
int i;
|
|
|
|
int ret = OK;
|
|
|
|
mfs_t sz;
|
|
|
|
mfs_t pg;
|
|
|
|
mfs_t blk;
|
|
|
|
mfs_t alloc_blk;
|
2024-07-13 14:10:47 +02:00
|
|
|
FAR char *tmp;
|
|
|
|
FAR char *buf = NULL;
|
|
|
|
|
2024-08-17 22:21:32 +02:00
|
|
|
/* TODO: Replace jrnl_blk with MFS_JRNL(sb).jrnl_start if possible. */
|
|
|
|
|
2024-07-13 14:10:47 +02:00
|
|
|
/* Write magic sequence, size of jrnlarr, and then the jrnlarr. */
|
|
|
|
|
2024-08-08 18:38:56 +02:00
|
|
|
sz = MFS_JRNL_SUFFIXSZ + ((CONFIG_MNEMOFS_JOURNAL_NBLKS + 2) * 4);
|
2024-07-13 14:10:47 +02:00
|
|
|
|
|
|
|
buf = kmm_zalloc(sz);
|
|
|
|
if (predict_false(buf == NULL))
|
|
|
|
{
|
|
|
|
ret = -ENOMEM;
|
|
|
|
goto errout;
|
|
|
|
}
|
|
|
|
|
2024-08-17 08:40:07 +02:00
|
|
|
if (*blk1 == 0 && *blk2 == 0)
|
2024-07-13 14:10:47 +02:00
|
|
|
{
|
2024-08-17 08:40:07 +02:00
|
|
|
*blk1 = mfs_ba_getblk(sb);
|
2024-07-13 14:10:47 +02:00
|
|
|
if (predict_false(blk1 == 0))
|
|
|
|
{
|
|
|
|
ret = -ENOSPC;
|
|
|
|
goto errout_with_buf;
|
|
|
|
}
|
|
|
|
|
2024-08-17 08:40:07 +02:00
|
|
|
finfo("Allocated Master Block 1: %d.", *blk1);
|
2024-07-13 14:10:47 +02:00
|
|
|
|
2024-08-17 08:40:07 +02:00
|
|
|
*blk2 = mfs_ba_getblk(sb);
|
2024-07-13 14:10:47 +02:00
|
|
|
if (predict_false(blk2 == 0))
|
|
|
|
{
|
|
|
|
ret = -ENOSPC;
|
|
|
|
goto errout_with_buf;
|
|
|
|
}
|
|
|
|
|
2024-08-17 08:40:07 +02:00
|
|
|
finfo("Allocated Master Block 1: %d.", *blk2);
|
|
|
|
finfo("New locations for Master Blocks %d & %d.", *blk1, *blk2);
|
2024-07-13 14:10:47 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
tmp = buf;
|
|
|
|
|
|
|
|
tmp = mfs_ser_str(MFS_JRNL_MAGIC, 8, tmp);
|
|
|
|
tmp = mfs_ser_16(CONFIG_MNEMOFS_JOURNAL_NBLKS, tmp);
|
|
|
|
for (i = 0; i < CONFIG_MNEMOFS_JOURNAL_NBLKS; i++)
|
|
|
|
{
|
|
|
|
alloc_blk = mfs_ba_getblk(sb);
|
|
|
|
tmp = mfs_ser_mfs(alloc_blk, tmp);
|
|
|
|
|
|
|
|
if (predict_false(i == 0))
|
|
|
|
{
|
2024-08-17 22:21:32 +02:00
|
|
|
blk = alloc_blk;
|
|
|
|
*jrnl_blk = alloc_blk;
|
|
|
|
MFS_JRNL(sb).jrnl_start = alloc_blk;
|
2024-07-13 14:10:47 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
finfo("Allocated Journal Block %d at Block %d.", i, alloc_blk);
|
|
|
|
}
|
|
|
|
|
2024-08-17 08:40:07 +02:00
|
|
|
tmp = mfs_ser_mfs(*blk1, tmp);
|
|
|
|
tmp = mfs_ser_mfs(*blk2, tmp);
|
2024-07-13 14:10:47 +02:00
|
|
|
|
|
|
|
finfo("All Journal Blocks allocated.");
|
|
|
|
|
|
|
|
pg = MFS_BLK2PG(sb, blk);
|
2024-08-17 22:21:32 +02:00
|
|
|
ret = mfs_write_page(sb, buf, sz, pg, 0); /* Assuming array fits in a
|
|
|
|
* single page.
|
|
|
|
*/
|
|
|
|
if (predict_false(ret < 0))
|
2024-07-13 14:10:47 +02:00
|
|
|
{
|
2024-08-17 22:21:32 +02:00
|
|
|
goto errout_with_buf;
|
2024-07-13 14:10:47 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
ret = OK; /* We reach here, we OK. */
|
|
|
|
|
|
|
|
finfo("Written magic sequence, size and journal array into the journal.");
|
|
|
|
|
|
|
|
MFS_JRNL(sb).n_logs = 0;
|
2024-08-17 08:40:07 +02:00
|
|
|
MFS_JRNL(sb).n_blks = CONFIG_MNEMOFS_JOURNAL_NBLKS;
|
2024-08-17 22:21:32 +02:00
|
|
|
MFS_JRNL(sb).log_cpg = pg + 1; /* Assumes 1 page for jrnl_arr. */
|
2024-07-13 14:10:47 +02:00
|
|
|
MFS_JRNL(sb).log_cblkidx = 0;
|
|
|
|
MFS_JRNL(sb).log_spg = MFS_JRNL(sb).log_cpg;
|
|
|
|
MFS_JRNL(sb).log_sblkidx = MFS_JRNL(sb).log_cblkidx;
|
|
|
|
MFS_JRNL(sb).jrnlarr_pg = MFS_BLK2PG(sb, blk);
|
2024-08-08 18:38:56 +02:00
|
|
|
MFS_JRNL(sb).jrnlarr_pgoff = MFS_JRNL_SUFFIXSZ;
|
2024-08-17 08:40:07 +02:00
|
|
|
MFS_JRNL(sb).mblk1 = *blk1;
|
|
|
|
MFS_JRNL(sb).mblk2 = *blk2;
|
2024-07-13 14:10:47 +02:00
|
|
|
|
|
|
|
errout_with_buf:
|
|
|
|
kmm_free(buf);
|
|
|
|
|
|
|
|
errout:
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
2024-08-08 18:38:56 +02:00
|
|
|
void mfs_jrnl_free(FAR struct mfs_sb_s * const sb)
|
|
|
|
{
|
2024-08-17 22:21:32 +02:00
|
|
|
if (!mfs_jrnl_isempty(sb) &&
|
|
|
|
MFS_JRNL(sb).log_cblkidx >= MFS_JRNL_LIM(sb))
|
|
|
|
{
|
|
|
|
mfs_jrnl_flush(sb);
|
|
|
|
}
|
|
|
|
|
2024-08-08 18:38:56 +02:00
|
|
|
finfo("Journal Freed.");
|
|
|
|
}
|
|
|
|
|
2024-07-13 14:10:47 +02:00
|
|
|
mfs_t mfs_jrnl_blkidx2blk(FAR const struct mfs_sb_s * const sb,
|
|
|
|
const mfs_t blk_idx)
|
|
|
|
{
|
2024-08-08 18:38:56 +02:00
|
|
|
int ret = OK;
|
2024-07-13 14:10:47 +02:00
|
|
|
mfs_t pg;
|
|
|
|
mfs_t idx;
|
2024-08-08 18:38:56 +02:00
|
|
|
mfs_t blk;
|
|
|
|
mfs_t pgoff;
|
2024-07-13 14:10:47 +02:00
|
|
|
char buf[4];
|
|
|
|
|
2024-08-17 22:21:32 +02:00
|
|
|
pg = MFS_JRNL(sb).jrnlarr_pg;
|
|
|
|
pgoff = MFS_JRNL(sb).jrnlarr_pgoff;
|
|
|
|
blk = MFS_PG2BLK(sb, pg);
|
2024-07-13 14:10:47 +02:00
|
|
|
pgoff += blk_idx * 4;
|
|
|
|
|
|
|
|
if (pgoff > MFS_PGSZ(sb))
|
|
|
|
{
|
|
|
|
pg += pgoff / MFS_PGSZ(sb);
|
|
|
|
pgoff %= MFS_PGSZ(sb);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* No pg overflow. The blocks have to be big enough. */
|
|
|
|
|
|
|
|
DEBUGASSERT(pg < (MFS_BLK2PG(sb, blk) + MFS_PGINBLK(sb)));
|
|
|
|
|
|
|
|
ret = mfs_read_page(sb, buf, 4, pg, pgoff);
|
|
|
|
if (predict_false(ret < 0))
|
|
|
|
{
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
mfs_deser_mfs(buf, &idx);
|
|
|
|
|
|
|
|
/* FUTURE TODO: Make it such that the entire jrnlarr doesn't need to be in
|
|
|
|
* a single block.
|
|
|
|
*/
|
2024-07-09 20:57:16 +02:00
|
|
|
|
2024-07-13 14:10:47 +02:00
|
|
|
return idx;
|
2024-07-09 20:57:16 +02:00
|
|
|
}
|
2024-08-08 18:38:56 +02:00
|
|
|
|
|
|
|
int mfs_jrnl_updatedinfo(FAR const struct mfs_sb_s * const sb,
|
|
|
|
FAR struct mfs_path_s * const path,
|
|
|
|
const mfs_t depth)
|
|
|
|
{
|
2024-08-17 22:21:32 +02:00
|
|
|
int ret = OK;
|
|
|
|
mfs_t blkidx;
|
|
|
|
mfs_t counter = 0;
|
|
|
|
mfs_t pg_in_block;
|
|
|
|
struct mfs_jrnl_log_s tmplog;
|
2024-08-08 18:38:56 +02:00
|
|
|
|
|
|
|
/* TODO: Allow optional filling of updated timestamps, etc. */
|
|
|
|
|
|
|
|
DEBUGASSERT(depth > 0);
|
|
|
|
|
|
|
|
blkidx = MFS_JRNL(sb).log_sblkidx;
|
|
|
|
pg_in_block = MFS_JRNL(sb).log_spg % MFS_PGINBLK(sb);
|
|
|
|
|
|
|
|
while (blkidx < MFS_JRNL(sb).n_blks && counter < MFS_JRNL(sb).n_logs)
|
|
|
|
{
|
2024-08-17 22:21:32 +02:00
|
|
|
ret = mfs_jrnl_rdlog(sb, &blkidx, &pg_in_block, &tmplog);
|
2024-08-08 18:38:56 +02:00
|
|
|
if (predict_false(ret < 0 && ret != -ENOSPC))
|
|
|
|
{
|
|
|
|
goto errout;
|
|
|
|
}
|
|
|
|
else if (ret == -ENOSPC)
|
|
|
|
{
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
DEBUGASSERT(tmplog.depth > 0);
|
|
|
|
|
|
|
|
if (tmplog.depth > depth)
|
|
|
|
{
|
|
|
|
/* Not suitable. */
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
DEBUGASSERT(tmplog.depth > 0);
|
|
|
|
|
|
|
|
if (mfs_path_eq(&tmplog.path[tmplog.depth - 1],
|
|
|
|
&path[tmplog.depth - 1]))
|
|
|
|
{
|
|
|
|
path[tmplog.depth - 1].ctz = tmplog.loc_new;
|
|
|
|
path[tmplog.depth - 1].sz = tmplog.sz_new;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2024-08-17 22:21:32 +02:00
|
|
|
mfs_jrnl_log_free(&tmplog);
|
2024-08-08 18:38:56 +02:00
|
|
|
counter++;
|
|
|
|
}
|
|
|
|
|
|
|
|
errout:
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
int mfs_jrnl_wrlog(FAR struct mfs_sb_s * const sb,
|
2024-08-17 08:40:07 +02:00
|
|
|
FAR const struct mfs_node_s *node,
|
2024-08-08 18:38:56 +02:00
|
|
|
const struct mfs_ctz_s loc_new, const mfs_t sz_new)
|
|
|
|
{
|
2024-08-17 22:21:32 +02:00
|
|
|
int ret = OK;
|
|
|
|
mfs_t jrnl_pg;
|
|
|
|
mfs_t jrnl_blk;
|
|
|
|
FAR char *buf = NULL;
|
|
|
|
FAR char *tmp = NULL;
|
|
|
|
const mfs_t log_sz = sizeof(mfs_t) + MFS_LOGSZ(node->depth);
|
|
|
|
struct mfs_jrnl_log_s log;
|
2024-08-08 18:38:56 +02:00
|
|
|
|
|
|
|
buf = kmm_zalloc(log_sz); /* For size before log. */
|
|
|
|
if (predict_false(buf == NULL))
|
|
|
|
{
|
|
|
|
ret = -ENOMEM;
|
|
|
|
goto errout;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Serialize */
|
|
|
|
|
2024-08-17 08:40:07 +02:00
|
|
|
log.depth = node->depth;
|
|
|
|
log.sz_new = sz_new;
|
2024-08-08 18:38:56 +02:00
|
|
|
log.loc_new = loc_new;
|
2024-08-17 08:40:07 +02:00
|
|
|
log.st_mtim_new = node->st_mtim;
|
|
|
|
log.st_atim_new = node->st_atim;
|
|
|
|
log.st_ctim_new = node->st_ctim;
|
|
|
|
log.path = node->path; /* Fine as temporarily usage. */
|
2024-08-08 18:38:56 +02:00
|
|
|
|
|
|
|
tmp = buf;
|
2024-08-17 08:40:07 +02:00
|
|
|
tmp = mfs_ser_mfs(log_sz - sizeof(mfs_t), tmp); /* First 4 bytes have sz */
|
2024-08-08 18:38:56 +02:00
|
|
|
tmp = ser_log(&log, tmp);
|
|
|
|
|
|
|
|
/* Store */
|
|
|
|
|
|
|
|
jrnl_blk = mfs_jrnl_blkidx2blk(sb, MFS_JRNL(sb).log_cblkidx);
|
|
|
|
jrnl_pg = MFS_JRNL(sb).log_cpg;
|
|
|
|
|
2024-08-17 22:21:32 +02:00
|
|
|
/* TODO: It assumes it takes only one page per log. */
|
2024-08-08 18:38:56 +02:00
|
|
|
|
2024-08-17 22:21:32 +02:00
|
|
|
ret = mfs_write_page(sb, buf, log_sz, jrnl_pg, 0);
|
|
|
|
if (predict_false(ret < 0))
|
|
|
|
{
|
|
|
|
goto errout_with_buf;
|
|
|
|
}
|
2024-08-08 18:38:56 +02:00
|
|
|
|
2024-08-17 22:21:32 +02:00
|
|
|
ret = OK;
|
2024-08-08 18:38:56 +02:00
|
|
|
|
2024-08-17 22:21:32 +02:00
|
|
|
jrnl_pg++;
|
2024-08-08 18:38:56 +02:00
|
|
|
|
2024-08-17 22:21:32 +02:00
|
|
|
if (jrnl_pg % MFS_PGINBLK(sb) == 0)
|
|
|
|
{
|
|
|
|
MFS_JRNL(sb).log_cblkidx++;
|
2024-08-08 18:38:56 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
MFS_JRNL(sb).log_cpg = jrnl_pg;
|
|
|
|
MFS_JRNL(sb).n_logs++;
|
|
|
|
|
|
|
|
errout_with_buf:
|
|
|
|
kmm_free(buf);
|
|
|
|
|
|
|
|
errout:
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
int mfs_jrnl_flush(FAR struct mfs_sb_s * const sb)
|
|
|
|
{
|
2024-08-17 08:40:07 +02:00
|
|
|
/* When a file or a directory is deleted.
|
|
|
|
*
|
|
|
|
* It will be modified to an entry in the LRU which details the deletion
|
|
|
|
* of all bytes from the child... as in, offset 0, deleted bytes is the
|
|
|
|
* size of the file.
|
|
|
|
*
|
|
|
|
* The new "location" can be used as (0, 0) to signify a deletion, even in
|
|
|
|
* its journal log.
|
|
|
|
*
|
|
|
|
* Also ensure if the size gets updated to 0.
|
|
|
|
*
|
|
|
|
* Then the flush operation problem will be solved for removal of files or
|
|
|
|
* directories.
|
|
|
|
*
|
|
|
|
* Move operation will not empty the child, but only the parent from the
|
|
|
|
* old parent.
|
|
|
|
*/
|
2024-08-08 18:38:56 +02:00
|
|
|
|
2024-08-17 08:40:07 +02:00
|
|
|
/* Time complexity is going to be horrendous. Hint: O(n^2). HOWEVER, as
|
|
|
|
* littlefs points out....if n is constant, it's essentially a O(k), or
|
|
|
|
* O(1) :D
|
|
|
|
*/
|
|
|
|
|
|
|
|
/* TODO: Need to consider how the LRU and Journal interact with each other
|
|
|
|
* for newly created fs object's entries.
|
|
|
|
*/
|
|
|
|
|
|
|
|
/* We're using updatectz to update the LRU inside the journal. Think
|
|
|
|
* about how that might affect the iteration attempts.
|
|
|
|
*/
|
|
|
|
|
|
|
|
int ret = OK;
|
|
|
|
mfs_t blkidx = MFS_JRNL(sb).log_sblkidx;
|
|
|
|
mfs_t log_itr = 0;
|
|
|
|
mfs_t pg_in_blk = MFS_JRNL(sb).log_spg \
|
|
|
|
% MFS_PGINBLK(sb);
|
|
|
|
mfs_t tmp_blkidx;
|
|
|
|
mfs_t tmp_pg_in_blk;
|
|
|
|
mfs_t mn_blk1;
|
|
|
|
mfs_t mn_blk2;
|
|
|
|
mfs_t i;
|
|
|
|
mfs_t jrnl_blk;
|
|
|
|
mfs_t blk;
|
2024-08-17 22:21:32 +02:00
|
|
|
struct mfs_jrnl_log_s log;
|
|
|
|
struct mfs_jrnl_log_s tmp_log;
|
2024-08-17 08:40:07 +02:00
|
|
|
FAR struct mfs_path_s *path = NULL;
|
|
|
|
struct mfs_jrnl_state_s j_state;
|
|
|
|
struct mfs_mn_s mn_state;
|
|
|
|
|
|
|
|
while (log_itr < MFS_JRNL(sb).n_logs)
|
|
|
|
{
|
2024-08-17 22:21:32 +02:00
|
|
|
ret = mfs_jrnl_rdlog(sb, &blkidx, &pg_in_blk, &log);
|
2024-08-17 08:40:07 +02:00
|
|
|
if (predict_false(ret < 0))
|
|
|
|
{
|
|
|
|
DEBUGASSERT(ret != -ENOSPC); /* While condition is sufficient. */
|
|
|
|
goto errout;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (log.loc_new.pg_e == 0 && log.loc_new.idx_e == 0)
|
|
|
|
{
|
|
|
|
/* Entry is deleted, do not bother with it. */
|
|
|
|
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
|
|
|
|
tmp_blkidx = blkidx;
|
|
|
|
tmp_pg_in_blk = pg_in_blk;
|
|
|
|
|
|
|
|
path = kmm_zalloc(log.depth * sizeof(struct mfs_path_s));
|
|
|
|
if (predict_false(path == NULL))
|
|
|
|
{
|
|
|
|
goto errout;
|
|
|
|
}
|
|
|
|
|
|
|
|
memcpy(path, log.path, log.depth * sizeof(struct mfs_path_s));
|
|
|
|
path[log.depth - 1].ctz = log.loc_new;
|
|
|
|
|
|
|
|
for (; ; )
|
|
|
|
{
|
2024-08-17 22:21:32 +02:00
|
|
|
ret = mfs_jrnl_rdlog(sb, &tmp_blkidx, &tmp_pg_in_blk, &tmp_log);
|
2024-08-17 08:40:07 +02:00
|
|
|
if (ret == -ENOSPC)
|
|
|
|
{
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
else if (predict_false(ret < 0))
|
|
|
|
{
|
2024-08-17 22:21:32 +02:00
|
|
|
mfs_jrnl_log_free(&log);
|
|
|
|
mfs_free_patharr(path);
|
2024-08-17 08:40:07 +02:00
|
|
|
goto errout;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (tmp_log.depth > log.depth)
|
|
|
|
{
|
2024-08-17 22:21:32 +02:00
|
|
|
mfs_jrnl_log_free(&tmp_log);
|
2024-08-17 08:40:07 +02:00
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (!mfs_path_eq(&path[tmp_log.depth - 1],
|
|
|
|
&tmp_log.path[tmp_log.depth - 1]))
|
|
|
|
{
|
2024-08-17 22:21:32 +02:00
|
|
|
mfs_jrnl_log_free(&tmp_log);
|
2024-08-17 08:40:07 +02:00
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
|
|
|
path[tmp_log.depth - 1] = tmp_log.path[tmp_log.depth - 1];
|
|
|
|
|
|
|
|
if (tmp_log.loc_new.pg_e == 0 && tmp_log.loc_new.idx_e == 0)
|
|
|
|
{
|
|
|
|
/* Entry is deleted, do not bother with it. */
|
|
|
|
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
if (log.depth == 1)
|
|
|
|
{
|
|
|
|
MFS_MN(sb).root_ctz = path[log.depth - 1].ctz;
|
|
|
|
MFS_MN(sb).root_sz = path[log.depth - 1].sz;
|
|
|
|
|
|
|
|
/* TODO: Other parameters. */
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
ret = mfs_lru_updatectz(sb, path, log.depth,
|
|
|
|
path[log.depth - 1].ctz,
|
|
|
|
path[log.depth - 1].sz);
|
|
|
|
if (predict_false(ret < 0))
|
|
|
|
{
|
|
|
|
mfs_free_patharr(path);
|
2024-08-17 22:21:32 +02:00
|
|
|
mfs_jrnl_log_free(&log);
|
2024-08-17 08:40:07 +02:00
|
|
|
goto errout;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
mfs_free_patharr(path);
|
2024-08-17 22:21:32 +02:00
|
|
|
mfs_jrnl_log_free(&log);
|
2024-08-17 08:40:07 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
if (MFS_MN(sb).mblk_idx == MFS_PGINBLK(sb))
|
|
|
|
{
|
|
|
|
mn_blk1 = 0;
|
|
|
|
mn_blk2 = 0;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
/* FUTURE TODO: Save the two block numbers in master node structure to
|
|
|
|
* be faster.
|
|
|
|
*/
|
|
|
|
|
|
|
|
mn_blk1 = mfs_jrnl_blkidx2blk(sb, MFS_JRNL(sb).n_blks);
|
|
|
|
mn_blk2 = mfs_jrnl_blkidx2blk(sb, MFS_JRNL(sb).n_blks + 1);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Reallocate journal. */
|
|
|
|
|
|
|
|
j_state = MFS_JRNL(sb);
|
|
|
|
mn_state = MFS_MN(sb);
|
|
|
|
|
|
|
|
ret = mfs_jrnl_fmt(sb, &mn_blk1, &mn_blk2, &jrnl_blk);
|
|
|
|
if (predict_false(ret < 0))
|
|
|
|
{
|
|
|
|
MFS_JRNL(sb) = j_state;
|
|
|
|
goto errout;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Write master node entry. */
|
|
|
|
|
|
|
|
ret = mfs_mn_sync(sb, &path[0], mn_blk1, mn_blk2, jrnl_blk);
|
|
|
|
if (predict_false(ret < 0))
|
|
|
|
{
|
|
|
|
MFS_MN(sb) = mn_state;
|
|
|
|
goto errout;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Mark all old blocks of journal (and master blocks) as deletable. */
|
|
|
|
|
|
|
|
for (i = 0; i < MFS_JRNL(sb).n_blks + 2; i++)
|
|
|
|
{
|
|
|
|
blk = mfs_jrnl_blkidx2blk(sb, i);
|
|
|
|
mfs_ba_blkmarkdel(sb, blk);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Delete outdated blocks. */
|
|
|
|
|
|
|
|
ret = mfs_ba_delmarked(sb);
|
|
|
|
if (predict_false(ret < 0))
|
|
|
|
{
|
|
|
|
goto errout;
|
|
|
|
}
|
|
|
|
|
|
|
|
errout:
|
|
|
|
return ret;
|
|
|
|
}
|
|
|
|
|
|
|
|
bool mfs_jrnl_isempty(FAR const struct mfs_sb_s * const sb)
|
|
|
|
{
|
|
|
|
return MFS_JRNL(sb).n_logs == 0;
|
2024-08-08 18:38:56 +02:00
|
|
|
}
|