cache_inode_open_close.c File Reference

Manage opening and closing files and caching file descriptors. More...

#include "fsal.h"
#include "abstract_atomic.h"
#include "log.h"
#include "HashData.h"
#include "HashTable.h"
#include "cache_inode.h"
#include "cache_inode_lru.h"
#include <unistd.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <sys/param.h>
#include <time.h>
#include <pthread.h>
#include <strings.h>
#include <assert.h>

Go to the source code of this file.

Functions
fsal_file_t *	cache_inode_fd (cache_entry_t *entry)
	Returns a file descriptor, if open.
bool_t	is_open_for_write (cache_entry_t *entry)
	Check if a file is available to write.
bool_t	is_open_for_read (cache_entry_t *entry)
	Check if a file is available to read.
cache_inode_status_t	cache_inode_open (cache_entry_t *entry, fsal_openflags_t openflags, fsal_op_context_t *context, uint32_t flags, cache_inode_status_t *status)
	Opens a file descriptor.
cache_inode_status_t	cache_inode_close (cache_entry_t *entry, uint32_t flags, cache_inode_status_t *status)
	Close a file.

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Detailed Description

Manage opening and closing files and caching file descriptors.

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Copyright CEA/DAM/DIF (2008) contributeur : Philippe DENIEL philippe.deniel@cea.fr Thomas LEIBOVICI thomas.leibovici@cea.fr

This program is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.

You should have received a copy of the GNU Lesser General Public License along with this library; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

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This file manages the opening and closing files and the file descriptor cache, in conjunction with the lru_thread in cache_inode_lru.

Definition in file cache_inode_open_close.c.

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Function Documentation

cache_inode_status_t cache_inode_close	(	cache_entry_t *	entry,
		uint32_t	flags,
		cache_inode_status_t *	status
	)

Close a file.

This function calls down to the FSAL to close the file.

Parameters:

[in]	entry	Cache entry to close
[in]	flags	Flags for lock management
[out]	status	Operation status

Returns:

CACHE_INODE_SUCCESS or errors on failure

Definition at line 261 of file cache_inode_open_close.c.

fsal_file_t* cache_inode_fd

(

cache_entry_t *

entry

)

Returns a file descriptor, if open.

This function returns the file descriptor stored in a cache entry, if the cached file is open.

Parameters:

[in]

entry

Entry for the file on which to operate

Returns:

A pointer to a file descriptor or NULL if the entry is closed.

Definition at line 73 of file cache_inode_open_close.c.

cache_inode_status_t cache_inode_open	(	cache_entry_t *	entry,
		fsal_openflags_t	openflags,
		fsal_op_context_t *	context,
		uint32_t	flags,
		cache_inode_status_t *	status
	)

Opens a file descriptor.

This function opens a file descriptor on a given cache entry.

Parameters:

[in]	entry	Cache entry representing the file to open
[in]	openflags	The type of access for which to open
[in]	context	FSAL operation context
[in]	flags	Flags indicating lock status
[out]	status	Operation status

Returns:

CACHE_INODE_SUCCESS if successful, errors otherwise

Definition at line 148 of file cache_inode_open_close.c.

bool_t is_open_for_read

(

cache_entry_t *

entry

)

Check if a file is available to read.

This function checks whether the given file is currently open in a mode supporting read operations.

Parameters:

[in]

entry

Entry for the file to check

Returns:

TRUE if the file is opened for reads

Definition at line 123 of file cache_inode_open_close.c.

bool_t is_open_for_write

(

cache_entry_t *

entry

)

Check if a file is available to write.

This function checks whether the given file is currently open in a mode supporting write operations.

Parameters:

[in]

entry

Entry for the file to check

Returns:

TRUE if the file is open for writes

Definition at line 102 of file cache_inode_open_close.c.