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* Use new version of CI-CD Actions, checkout@v3 instead of checkout@v2 on all jobs * Use cSpell spell check, and use ubuntu-20.04 for formatting check * Add in bot formatting action * Update freertos_demo.yml and freertos_plus_demo.yml files to increase github log readability * Add in a Qemu demo onto the workflows.
134 lines
4.6 KiB
C
134 lines
4.6 KiB
C
/* ----> DO NOT REMOVE THE FOLLOWING NOTICE <----
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*
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* Copyright (c) 2014-2015 Datalight, Inc.
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* All Rights Reserved Worldwide.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; use version 2 of the License.
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*
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* This program is distributed in the hope that it will be useful,
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* but "AS-IS," WITHOUT ANY WARRANTY; without even the implied warranty
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* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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/* Businesses and individuals that for commercial or other reasons cannot
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* comply with the terms of the GPLv2 license may obtain a commercial license
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* before incorporating Reliance Edge into proprietary software for
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* distribution in any form. Visit http://www.datalight.com/reliance-edge for
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* more information.
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*/
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/** @file
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* @brief Implements routines for the inline imap.
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*
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* The inline imap is used on volumes that are small enough for the imap bitmap
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* to be entirely contained within the metaroot.
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*/
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#include <redfs.h>
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#if REDCONF_IMAP_INLINE == 1
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#include <redcore.h>
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/** @brief Get the allocation bit of a block from either metaroot.
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*
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* @param bMR The metaroot index: either 0 or 1.
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* @param ulBlock The block number to query.
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* @param pfAllocated On successful return, populated with the allocation bit
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* of the block.
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*
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* @return A negated ::REDSTATUS code indicating the operation result.
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*
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* @retval 0 Operation was successful.
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* @retval -RED_EINVAL @p bMR is out of range; or @p ulBlock is out of range;
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* @p pfAllocated is `NULL`; or the current volume does not
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* use the inline imap.
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*/
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REDSTATUS RedImapIBlockGet( uint8_t bMR,
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uint32_t ulBlock,
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bool * pfAllocated )
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{
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REDSTATUS ret;
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if( ( !gpRedCoreVol->fImapInline ) ||
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( bMR > 1U ) ||
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( ulBlock < gpRedCoreVol->ulInodeTableStartBN ) ||
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( ulBlock >= gpRedVolume->ulBlockCount ) ||
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( pfAllocated == NULL ) )
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{
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REDERROR();
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ret = -RED_EINVAL;
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}
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else
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{
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*pfAllocated = RedBitGet( gpRedCoreVol->aMR[ bMR ].abEntries, ulBlock - gpRedCoreVol->ulInodeTableStartBN );
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ret = 0;
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}
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return ret;
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}
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#if REDCONF_READ_ONLY == 0
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/** @brief Set the allocation bit of a block in the working metaroot.
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*
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* @param ulBlock The block number to allocate or free.
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* @param fAllocated Whether to allocate the block (true) or free it (false).
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*
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* @return A negated ::REDSTATUS code indicating the operation result.
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*
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* @retval 0 Operation was successful.
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* @retval -RED_EINVAL @p ulBlock is out of range; or the current volume does
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* not use the inline imap.
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*/
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REDSTATUS RedImapIBlockSet( uint32_t ulBlock,
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bool fAllocated )
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{
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REDSTATUS ret;
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if( ( !gpRedCoreVol->fImapInline ) ||
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( ulBlock < gpRedCoreVol->ulInodeTableStartBN ) ||
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( ulBlock >= gpRedVolume->ulBlockCount ) )
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{
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REDERROR();
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ret = -RED_EINVAL;
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}
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else
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{
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uint32_t ulOffset = ulBlock - gpRedCoreVol->ulInodeTableStartBN;
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if( RedBitGet( gpRedMR->abEntries, ulOffset ) == fAllocated )
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{
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/* The driver shouldn't ever set a bit in the imap to its current
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* value. This is more of a problem with the external imap, but it
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* is checked here for consistency.
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*/
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CRITICAL_ERROR();
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ret = -RED_EFUBAR;
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}
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else if( fAllocated )
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{
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RedBitSet( gpRedMR->abEntries, ulOffset );
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ret = 0;
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}
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else
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{
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RedBitClear( gpRedMR->abEntries, ulOffset );
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ret = 0;
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}
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}
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return ret;
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}
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#endif /* if REDCONF_READ_ONLY == 0 */
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#endif /* REDCONF_IMAP_INLINE == 1 */
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