WebSVN – HelenOS – Blame – //trunk/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 {
4584	jermar	60	VFS_IN_OPEN = IPC_FIRST_USER_METHOD,
		61	VFS_IN_OPEN_NODE,
		62	VFS_IN_READ,
		63	VFS_IN_WRITE,
		64	VFS_IN_SEEK,
		65	VFS_IN_TRUNCATE,
4585	jermar	66	VFS_IN_FSTAT,
4584	jermar	67	VFS_IN_CLOSE,
		68	VFS_IN_MOUNT,
		69	VFS_IN_UNMOUNT,
		70	VFS_IN_SYNC,
		71	VFS_IN_REGISTER,
		72	VFS_IN_MKDIR,
		73	VFS_IN_UNLINK,
		74	VFS_IN_RENAME,
4609	decky	75	VFS_IN_STAT
4584	jermar	76	} vfs_in_request_t;
4481	decky	77
		78	typedef enum {
4584	jermar	79	VFS_OUT_OPEN_NODE = IPC_FIRST_USER_METHOD,
		80	VFS_OUT_READ,
		81	VFS_OUT_WRITE,
		82	VFS_OUT_TRUNCATE,
		83	VFS_OUT_CLOSE,
		84	VFS_OUT_MOUNT,
		85	VFS_OUT_MOUNTED,
		86	VFS_OUT_UNMOUNT,
		87	VFS_OUT_SYNC,
4585	jermar	88	VFS_OUT_STAT,
4584	jermar	89	VFS_OUT_LOOKUP,
		90	VFS_OUT_DESTROY,
		91	VFS_OUT_LAST
		92	} vfs_out_request_t;
4481	decky	93
		94	/*
		95	* Lookup flags.
		96	*/
		97
		98	/**
		99	* No lookup flags used.
		100	*/
		101	#define L_NONE 0
		102
		103	/**
		104	* Lookup will succeed only if the object is a regular file. If L_CREATE is
		105	* specified, an empty file will be created. This flag is mutually exclusive
		106	* with L_DIRECTORY.
		107	*/
		108	#define L_FILE 1
		109
		110	/**
		111	* Lookup wil succeed only if the object is a directory. If L_CREATE is
		112	* specified, an empty directory will be created. This flag is mutually
		113	* exclusive with L_FILE.
		114	*/
		115	#define L_DIRECTORY 2
		116
		117	/**
		118	* When used with L_CREATE, L_EXCLUSIVE will cause the lookup to fail if the
		119	* object already exists. L_EXCLUSIVE is implied when L_DIRECTORY is used.
		120	*/
		121	#define L_EXCLUSIVE 4
		122
		123	/**
		124	* L_CREATE is used for creating both regular files and directories.
		125	*/
		126	#define L_CREATE 8
		127
		128	/**
		129	* L_LINK is used for linking to an already existing nodes.
		130	*/
		131	#define L_LINK 16
		132
		133	/**
		134	* L_UNLINK is used to remove leaves from the file system namespace. This flag
		135	* cannot be passed directly by the client, but will be set by VFS during
		136	* VFS_UNLINK.
		137	*/
		138	#define L_UNLINK 32
		139
		140	/**
		141	* L_OPEN is used to indicate that the lookup operation is a part of VFS_OPEN
		142	* call from the client. This means that the server might allocate some
		143	* resources for the opened file. This flag cannot be passed directly by the
		144	* client.
		145	*/
		146	#define L_OPEN 64
		147
		148	#endif
		149
		150	/** @}
		151	*/

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