2007-05-09 02:04:03 +02:00
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/****************************************************************************
|
2014-09-29 15:14:38 +02:00
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* fs/inode/inode.h
|
2007-02-18 00:21:28 +01:00
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*
|
2014-02-19 20:14:39 +01:00
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* Copyright (C) 2007, 2009, 2012, 2014 Gregory Nutt. All rights reserved.
|
2012-02-15 18:51:30 +01:00
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* Author: Gregory Nutt <gnutt@nuttx.org>
|
2007-02-18 00:21:28 +01:00
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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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*
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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
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* the documentation and/or other materials provided with the
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* distribution.
|
2009-12-13 19:01:46 +01:00
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* 3. Neither the name NuttX nor the names of its contributors may be
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2007-02-18 00:21:28 +01:00
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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2007-05-09 02:04:03 +02:00
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****************************************************************************/
|
2007-02-18 00:21:28 +01:00
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2014-09-29 15:14:38 +02:00
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#ifndef __FS_INODE_H
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#define __FS_INODE_H
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2007-02-18 00:21:28 +01:00
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2007-05-09 02:04:03 +02:00
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/****************************************************************************
|
2007-02-18 00:21:28 +01:00
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* Included Files
|
2007-05-09 02:04:03 +02:00
|
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|
****************************************************************************/
|
2007-02-18 00:21:28 +01:00
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#include <nuttx/config.h>
|
2009-12-15 01:18:32 +01:00
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#include <sys/types.h>
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#include <stdint.h>
|
2007-03-14 23:41:09 +01:00
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#include <dirent.h>
|
2009-12-15 01:18:32 +01:00
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|
2012-03-21 19:01:07 +01:00
|
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#include <nuttx/fs/fs.h>
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2007-02-18 00:21:28 +01:00
|
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|
#include <nuttx/compiler.h>
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|
2007-05-09 02:04:03 +02:00
|
|
|
/****************************************************************************
|
2009-12-15 01:18:32 +01:00
|
|
|
* Pre-processor Definitions
|
2007-05-09 02:04:03 +02:00
|
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|
****************************************************************************/
|
2014-09-28 17:13:56 +02:00
|
|
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/* Inode i_flag values */
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#define FSNODEFLAG_TYPE_MASK 0x00000007 /* Isolates type field */
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#define FSNODEFLAG_TYPE_DRIVER 0x00000000 /* Character driver */
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#define FSNODEFLAG_TYPE_BLOCK 0x00000001 /* Block driver */
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#define FSNODEFLAG_TYPE_MOUNTPT 0x00000002 /* Mount point */
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#define FSNODEFLAG_TYPE_SPECIAL 0x00000004 /* Special OS type */
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#define FSNODEFLAG_TYPE_NAMEDSEM 0x00000004 /* Named semaphore */
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#define FSNODEFLAG_TYPE_MQUEUE 0x00000005 /* Message Queue */
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#define FSNODEFLAG_TYPE_SHM 0x00000006 /* Shared memory region */
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#define FSNODEFLAG_DELETED 0x00000008 /* Unlinked */
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#define INODE_IS_TYPE(i,t) \
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(((i)->i_flags & FSNODEFLAG_TYPE_MASK) == (t))
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#define INODE_IS_SPECIAL(i) \
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(((i)->i_flags & FSNODEFLAG_TYPE_SPECIAL) != 0)
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#define INODE_IS_DRIVER(i) INODE_IS_TYPE(i,FSNODEFLAG_TYPE_DRIVER)
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#define INODE_IS_BLOCK(i) INODE_IS_TYPE(i,FSNODEFLAG_TYPE_BLOCK)
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#define INODE_IS_MOUNTPT(i) INODE_IS_TYPE(i,FSNODEFLAG_TYPE_MOUNTPT)
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#define INODE_IS_NAMEDSEM(i) INODE_IS_TYPE(i,FSNODEFLAG_TYPE_NAMEDSEM)
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#define INODE_IS_MQUEUE(i) INODE_IS_TYPE(i,FSNODEFLAG_TYPE_MQUEUE)
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#define INODE_IS_SHM(i) INODE_IS_TYPE(i,FSNODEFLAG_TYPE_SHM)
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#define INODE_GET_TYPE(i) ((i)->i_flags & FSNODEFLAG_TYPE_MASK)
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#define INODE_SET_TYPE(i,t) \
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do \
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{ \
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(i)->i_flags = ((i)->i_flags & ~FSNODEFLAG_TYPE_MASK) | (t); \
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} \
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while (0)
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#define INODE_SET_DRIVER(i) INODE_SET_TYPE(i,FSNODEFLAG_TYPE_DRIVER)
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#define INODE_SET_BLOCK(i) INODE_SET_TYPE(i,FSNODEFLAG_TYPE_BLOCK)
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#define INODE_SET_MOUNTPT(i) INODE_SET_TYPE(i,FSNODEFLAG_TYPE_MOUNTPT)
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#define INODE_SET_NAMEDSEM(i) INODE_SET_TYPE(i,FSNODEFLAG_TYPE_NAMEDSEM)
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#define INODE_SET_MQUEUE(i) INODE_SET_TYPE(i,FSNODEFLAG_TYPE_MQUEUE)
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#define INODE_SET_SHM(i) INODE_SET_TYPE(i,FSNODEFLAG_TYPE_SHM)
|
2007-05-09 02:04:03 +02:00
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|
2007-05-27 00:37:57 +02:00
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|
|
/* Mountpoint fd_flags values */
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|
|
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|
2012-08-05 19:44:11 +02:00
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|
#define DIRENTFLAGS_PSEUDONODE 1
|
2007-05-27 00:37:57 +02:00
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|
2012-08-05 19:44:11 +02:00
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|
#define DIRENT_SETPSEUDONODE(f) do (f) |= DIRENTFLAGS_PSEUDONODE; while (0)
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#define DIRENT_ISPSEUDONODE(f) (((f) & DIRENTFLAGS_PSEUDONODE) != 0)
|
2007-05-27 00:37:57 +02:00
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|
2007-05-09 02:04:03 +02:00
|
|
|
/****************************************************************************
|
2007-02-18 00:21:28 +01:00
|
|
|
* Public Types
|
2007-05-09 02:04:03 +02:00
|
|
|
****************************************************************************/
|
2007-02-18 00:21:28 +01:00
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|
|
2012-08-04 00:04:14 +02:00
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/* Callback used by foreach_inode to traverse all inodes in the pseudo-
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* file system.
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*/
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typedef int (*foreach_inode_t)(FAR struct inode *node,
|
2012-08-04 01:47:32 +02:00
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|
FAR char dirpath[PATH_MAX],
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FAR void *arg);
|
2012-08-04 00:04:14 +02:00
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|
2007-05-09 02:04:03 +02:00
|
|
|
/****************************************************************************
|
2015-10-03 00:30:35 +02:00
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|
* Public Data
|
2007-05-09 02:04:03 +02:00
|
|
|
****************************************************************************/
|
2007-02-18 00:21:28 +01:00
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|
#undef EXTERN
|
|
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|
#if defined(__cplusplus)
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|
|
#define EXTERN extern "C"
|
2014-09-29 15:14:38 +02:00
|
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|
extern "C"
|
|
|
|
{
|
2007-02-18 00:21:28 +01:00
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|
|
#else
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|
#define EXTERN extern
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|
|
#endif
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|
|
|
2015-06-11 19:24:20 +02:00
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|
EXTERN FAR struct inode *g_root_inode;
|
2014-09-29 15:14:38 +02:00
|
|
|
|
|
|
|
/****************************************************************************
|
|
|
|
* Public Function Prototypes
|
|
|
|
****************************************************************************/
|
2016-04-12 02:16:04 +02:00
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|
2007-05-09 02:04:03 +02:00
|
|
|
/* fs_inode.c ***************************************************************/
|
2014-10-06 16:11:37 +02:00
|
|
|
/****************************************************************************
|
|
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|
* Name: inode_initialize
|
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*
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* Description:
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|
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* This is called from the OS initialization logic to configure the file
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* system.
|
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*
|
|
|
|
****************************************************************************/
|
|
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void inode_initialize(void);
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|
2012-08-04 00:04:14 +02:00
|
|
|
/****************************************************************************
|
|
|
|
* Name: inode_semtake
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*
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|
* Description:
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* Get exclusive access to the in-memory inode tree (tree_sem).
|
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*
|
|
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|
****************************************************************************/
|
2007-02-18 00:21:28 +01:00
|
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|
2013-09-29 00:50:07 +02:00
|
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void inode_semtake(void);
|
2012-08-04 00:04:14 +02:00
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|
|
|
/****************************************************************************
|
|
|
|
* Name: inode_semgive
|
|
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|
*
|
|
|
|
* Description:
|
|
|
|
* Relinquish exclusive access to the in-memory inode tree (tree_sem).
|
|
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|
*
|
|
|
|
****************************************************************************/
|
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|
2013-09-29 00:50:07 +02:00
|
|
|
void inode_semgive(void);
|
2012-08-04 00:04:14 +02:00
|
|
|
|
|
|
|
/****************************************************************************
|
|
|
|
* Name: inode_search
|
|
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*
|
|
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|
* Description:
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|
|
|
* Find the inode associated with 'path' returning the inode references
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* and references to its companion nodes.
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*
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|
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|
* Assumptions:
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|
* The caller holds the tree_sem
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|
*
|
|
|
|
****************************************************************************/
|
|
|
|
|
2013-09-29 00:50:07 +02:00
|
|
|
FAR struct inode *inode_search(FAR const char **path,
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|
|
|
FAR struct inode **peer,
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|
|
FAR struct inode **parent,
|
|
|
|
FAR const char **relpath);
|
2012-08-04 00:04:14 +02:00
|
|
|
|
|
|
|
/****************************************************************************
|
|
|
|
* Name: inode_free
|
|
|
|
*
|
|
|
|
* Description:
|
|
|
|
* Free resources used by an inode
|
|
|
|
*
|
|
|
|
****************************************************************************/
|
|
|
|
|
2013-09-29 00:50:07 +02:00
|
|
|
void inode_free(FAR struct inode *node);
|
2012-08-04 00:04:14 +02:00
|
|
|
|
|
|
|
/****************************************************************************
|
|
|
|
* Name: inode_nextname
|
|
|
|
*
|
|
|
|
* Description:
|
|
|
|
* Given a path with node names separated by '/', return the next node
|
|
|
|
* name.
|
|
|
|
*
|
|
|
|
****************************************************************************/
|
|
|
|
|
2013-09-29 00:50:07 +02:00
|
|
|
const char *inode_nextname(FAR const char *name);
|
2007-03-14 23:41:09 +01:00
|
|
|
|
2012-08-04 00:04:14 +02:00
|
|
|
/* fs_inodereserver.c *******************************************************/
|
|
|
|
/****************************************************************************
|
|
|
|
* Name: inode_reserve
|
|
|
|
*
|
|
|
|
* Description:
|
|
|
|
* Reserve an (initialized) inode the pseudo file system.
|
|
|
|
*
|
|
|
|
* NOTE: Caller must hold the inode semaphore
|
|
|
|
*
|
|
|
|
* Input parameters:
|
|
|
|
* path - The path to the inode to create
|
|
|
|
* inode - The location to return the inode pointer
|
|
|
|
*
|
|
|
|
* Returned Value:
|
|
|
|
* Zero on success (with the inode point in 'inode'); A negated errno
|
|
|
|
* value is returned on failure:
|
|
|
|
*
|
|
|
|
* EINVAL - 'path' is invalid for this operation
|
|
|
|
* EEXIST - An inode already exists at 'path'
|
|
|
|
* ENOMEM - Failed to allocate in-memory resources for the operation
|
|
|
|
*
|
|
|
|
****************************************************************************/
|
2007-05-09 02:04:03 +02:00
|
|
|
|
2013-09-29 00:50:07 +02:00
|
|
|
int inode_reserve(FAR const char *path, FAR struct inode **inode);
|
2007-05-09 02:04:03 +02:00
|
|
|
|
2012-08-04 00:04:14 +02:00
|
|
|
/* fs_inoderemove.c *********************************************************/
|
2014-02-19 20:14:39 +01:00
|
|
|
/****************************************************************************
|
|
|
|
* Name: inode_unlink
|
|
|
|
*
|
|
|
|
* Description:
|
|
|
|
* Given a path, remove a the node from the in-memory, inode tree that the
|
|
|
|
* path refers to. This is normally done in preparation to removing or
|
|
|
|
* moving an inode.
|
|
|
|
*
|
|
|
|
* Assumptions/Limitations:
|
|
|
|
* The caller must hold the inode semaphore
|
|
|
|
*
|
|
|
|
****************************************************************************/
|
|
|
|
|
|
|
|
FAR struct inode *inode_unlink(FAR const char *path);
|
|
|
|
|
2012-08-04 00:04:14 +02:00
|
|
|
/****************************************************************************
|
|
|
|
* Name: inode_remove
|
|
|
|
*
|
|
|
|
* Description:
|
2014-02-19 20:14:39 +01:00
|
|
|
* Given a path, remove a the node from the in-memory, inode tree that the
|
|
|
|
* path refers to and free all resources related to the inode. If the
|
|
|
|
* inode is in-use, then it will be unlinked, but will not be freed until
|
|
|
|
* the last reference to the inode is released.
|
2012-08-04 00:04:14 +02:00
|
|
|
*
|
2014-02-19 20:14:39 +01:00
|
|
|
* Assumptions/Limitations:
|
|
|
|
* The caller must hold the inode semaphore
|
2012-08-04 00:04:14 +02:00
|
|
|
*
|
|
|
|
****************************************************************************/
|
2007-05-09 02:04:03 +02:00
|
|
|
|
2013-09-29 00:50:07 +02:00
|
|
|
int inode_remove(FAR const char *path);
|
2007-03-14 23:41:09 +01:00
|
|
|
|
2012-08-04 00:04:14 +02:00
|
|
|
/* fs_inodefind.c ***********************************************************/
|
|
|
|
/****************************************************************************
|
|
|
|
* Name: inode_find
|
|
|
|
*
|
|
|
|
* Description:
|
|
|
|
* This is called from the open() logic to get a reference to the inode
|
|
|
|
* associated with a path.
|
|
|
|
*
|
|
|
|
****************************************************************************/
|
2007-03-14 23:41:09 +01:00
|
|
|
|
2013-09-29 00:50:07 +02:00
|
|
|
FAR struct inode *inode_find(FAR const char *path, const char **relpath);
|
2007-03-14 23:41:09 +01:00
|
|
|
|
2012-08-04 00:04:14 +02:00
|
|
|
/* fs_inodeaddref.c *********************************************************/
|
2007-03-14 23:41:09 +01:00
|
|
|
|
2013-09-29 00:50:07 +02:00
|
|
|
void inode_addref(FAR struct inode *inode);
|
2007-03-14 23:41:09 +01:00
|
|
|
|
2012-08-04 00:04:14 +02:00
|
|
|
/* fs_inoderelease.c ********************************************************/
|
2007-03-14 23:41:09 +01:00
|
|
|
|
2013-09-29 00:50:07 +02:00
|
|
|
void inode_release(FAR struct inode *inode);
|
2007-02-18 00:21:28 +01:00
|
|
|
|
2012-08-04 00:04:14 +02:00
|
|
|
/* fs_foreachinode.c ********************************************************/
|
|
|
|
/****************************************************************************
|
|
|
|
* Name: foreach_inode
|
|
|
|
*
|
|
|
|
* Description:
|
|
|
|
* Visit each inode in the pseudo-file system. The traversal is terminated
|
|
|
|
* when the callback 'handler' returns a non-zero value, or when all of
|
|
|
|
* the inodes have been visited.
|
|
|
|
*
|
2012-08-05 19:44:11 +02:00
|
|
|
* NOTE 1: Use with caution... The pseudo-file system is locked throughout
|
2012-08-04 00:04:14 +02:00
|
|
|
* the traversal.
|
|
|
|
* NOTE 2: The search algorithm is recursive and could, in principle, use
|
|
|
|
* an indeterminant amount of stack space. This will not usually be a
|
|
|
|
* real work issue.
|
|
|
|
*
|
|
|
|
****************************************************************************/
|
|
|
|
|
2013-09-29 00:50:07 +02:00
|
|
|
int foreach_inode(foreach_inode_t handler, FAR void *arg);
|
2012-08-04 00:04:14 +02:00
|
|
|
|
|
|
|
/* fs_files.c ***************************************************************/
|
|
|
|
/****************************************************************************
|
|
|
|
* Name: files_initialize
|
|
|
|
*
|
|
|
|
* Description:
|
|
|
|
* This is called from the FS initialization logic to configure the files.
|
|
|
|
*
|
|
|
|
****************************************************************************/
|
2007-02-18 00:21:28 +01:00
|
|
|
|
2013-09-29 00:50:07 +02:00
|
|
|
void weak_function files_initialize(void);
|
2012-08-04 00:04:14 +02:00
|
|
|
|
|
|
|
/****************************************************************************
|
|
|
|
* Name: files_allocate
|
|
|
|
*
|
|
|
|
* Description:
|
|
|
|
* Allocate a struct files instance and associate it with an inode instance.
|
|
|
|
* Returns the file descriptor == index into the files array.
|
|
|
|
*
|
|
|
|
****************************************************************************/
|
|
|
|
|
2013-09-29 00:50:07 +02:00
|
|
|
int files_allocate(FAR struct inode *inode, int oflags, off_t pos, int minfd);
|
2012-08-04 00:04:14 +02:00
|
|
|
|
|
|
|
/****************************************************************************
|
|
|
|
* Name: files_close
|
|
|
|
*
|
|
|
|
* Description:
|
|
|
|
* Close an inode (if open)
|
|
|
|
*
|
|
|
|
* Assumuptions:
|
|
|
|
* Caller holds the list semaphore because the file descriptor will be freed.
|
|
|
|
*
|
|
|
|
****************************************************************************/
|
|
|
|
|
2013-09-29 00:50:07 +02:00
|
|
|
int files_close(int fd);
|
2012-08-04 00:04:14 +02:00
|
|
|
|
|
|
|
/****************************************************************************
|
|
|
|
* Name: files_release
|
|
|
|
*
|
|
|
|
* Assumuptions:
|
|
|
|
* Similar to files_close(). Called only from open() logic on error
|
|
|
|
* conditions.
|
|
|
|
*
|
|
|
|
****************************************************************************/
|
|
|
|
|
2013-09-29 00:50:07 +02:00
|
|
|
void files_release(int fd);
|
2007-02-18 00:21:28 +01:00
|
|
|
|
|
|
|
#undef EXTERN
|
|
|
|
#if defined(__cplusplus)
|
|
|
|
}
|
2007-02-27 22:17:21 +01:00
|
|
|
#endif
|
2007-02-18 00:21:28 +01:00
|
|
|
|
2014-09-29 15:14:38 +02:00
|
|
|
#endif /* __FS_INODE_H */
|