WebSVN – HelenOS – Blame – //branches/network/uspace/lib/libc/include/ipc/vfs.h

Rev	Author	Line No.	Line
4481	decky	1	/*
		2	* Copyright (c) 2009 Martin Decky
		3	* All rights reserved.
		4	*
		5	* Redistribution and use in source and binary forms, with or without
		6	* modification, are permitted provided that the following conditions
		7	* are met:
		8	*
		9	* - Redistributions of source code must retain the above copyright
		10	* notice, this list of conditions and the following disclaimer.
		11	* - Redistributions in binary form must reproduce the above copyright
		12	* notice, this list of conditions and the following disclaimer in the
		13	* documentation and/or other materials provided with the distribution.
		14	* - The name of the author may not be used to endorse or promote products
		15	* derived from this software without specific prior written permission.
		16	*
		17	* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
		18	* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
		19	* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
		20	* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
		21	* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
		22	* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
		23	* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
		24	* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
		25	* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
		26	* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
		27	*/
		28
		29	/** @addtogroup libcipc
		30	* @{
		31	*/
		32	/** @file
		33	*/
		34
		35	#ifndef LIBC_IPC_VFS_H_
		36	#define LIBC_IPC_VFS_H_
		37
		38	#include <sys/types.h>
		39	#include <ipc/ipc.h>
		40
		41	#define FS_NAME_MAXLEN 20
		42	#define MAX_PATH_LEN (64 * 1024)
		43	#define PLB_SIZE (2 * MAX_PATH_LEN)
		44
		45	/* Basic types. */
		46	typedef int16_t fs_handle_t;
		47	typedef uint32_t fs_index_t;
		48
		49	/**
		50	* A structure like this is passed to VFS by each individual FS upon its
		51	* registration. It assosiates a human-readable identifier with each
		52	* registered FS.
		53	*/
		54	typedef struct {
		55	/** Unique identifier of the fs. */
		56	char name[FS_NAME_MAXLEN + 1];
		57	} vfs_info_t;
		58
		59	typedef enum {
		60	VFS_OPEN_NODE = IPC_FIRST_USER_METHOD,
		61	VFS_READ,
		62	VFS_WRITE,
		63	VFS_TRUNCATE,
		64	VFS_MOUNT,
		65	VFS_UNMOUNT,
		66	VFS_DEVICE,
		67	VFS_SYNC,
		68	VFS_CLOSE,
		69	VFS_LAST_CMN /* keep this the last member of this enum */
		70	} vfs_request_cmn_t;
		71
		72	typedef enum {
		73	VFS_LOOKUP = VFS_LAST_CMN,
		74	VFS_MOUNTED,
		75	VFS_DESTROY,
		76	VFS_LAST_CLNT /* keep this the last member of this enum */
		77	} vfs_request_clnt_t;
		78
		79	typedef enum {
		80	VFS_REGISTER = VFS_LAST_CMN,
		81	VFS_OPEN,
		82	VFS_SEEK,
		83	VFS_MKDIR,
		84	VFS_UNLINK,
		85	VFS_RENAME,
		86	VFS_NODE,
		87	VFS_LAST_SRV /* keep this the last member of this enum */
		88	} vfs_request_srv_t;
		89
		90	/*
		91	* Lookup flags.
		92	*/
		93
		94	/**
		95	* No lookup flags used.
		96	*/
		97	#define L_NONE 0
		98
		99	/**
		100	* Lookup will succeed only if the object is a regular file. If L_CREATE is
		101	* specified, an empty file will be created. This flag is mutually exclusive
		102	* with L_DIRECTORY.
		103	*/
		104	#define L_FILE 1
		105
		106	/**
		107	* Lookup wil succeed only if the object is a directory. If L_CREATE is
		108	* specified, an empty directory will be created. This flag is mutually
		109	* exclusive with L_FILE.
		110	*/
		111	#define L_DIRECTORY 2
		112
		113	/**
		114	* When used with L_CREATE, L_EXCLUSIVE will cause the lookup to fail if the
		115	* object already exists. L_EXCLUSIVE is implied when L_DIRECTORY is used.
		116	*/
		117	#define L_EXCLUSIVE 4
		118
		119	/**
		120	* L_CREATE is used for creating both regular files and directories.
		121	*/
		122	#define L_CREATE 8
		123
		124	/**
		125	* L_LINK is used for linking to an already existing nodes.
		126	*/
		127	#define L_LINK 16
		128
		129	/**
		130	* L_UNLINK is used to remove leaves from the file system namespace. This flag
		131	* cannot be passed directly by the client, but will be set by VFS during
		132	* VFS_UNLINK.
		133	*/
		134	#define L_UNLINK 32
		135
		136	/**
		137	* L_OPEN is used to indicate that the lookup operation is a part of VFS_OPEN
		138	* call from the client. This means that the server might allocate some
		139	* resources for the opened file. This flag cannot be passed directly by the
		140	* client.
		141	*/
		142	#define L_OPEN 64
		143
		144	#endif
		145
		146	/** @}
		147	*/

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