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Diffstat (limited to 'fs/exofs/common.h')
| -rw-r--r-- | fs/exofs/common.h | 262 |
1 files changed, 0 insertions, 262 deletions
diff --git a/fs/exofs/common.h b/fs/exofs/common.h deleted file mode 100644 index 7d88ef566213..000000000000 --- a/fs/exofs/common.h +++ /dev/null @@ -1,262 +0,0 @@ -/* - * common.h - Common definitions for both Kernel and user-mode utilities - * - * Copyright (C) 2005, 2006 - * Avishay Traeger (avishay@gmail.com) - * Copyright (C) 2008, 2009 - * Boaz Harrosh <ooo@electrozaur.com> - * - * Copyrights for code taken from ext2: - * Copyright (C) 1992, 1993, 1994, 1995 - * Remy Card (card@masi.ibp.fr) - * Laboratoire MASI - Institut Blaise Pascal - * Universite Pierre et Marie Curie (Paris VI) - * from - * linux/fs/minix/inode.c - * Copyright (C) 1991, 1992 Linus Torvalds - * - * This file is part of exofs. - * - * exofs is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation. Since it is based on ext2, and the only - * valid version of GPL for the Linux kernel is version 2, the only valid - * version of GPL for exofs is version 2. - * - * exofs 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 General Public License for more details. - * - * You should have received a copy of the GNU General Public License - * along with exofs; if not, write to the Free Software - * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#ifndef __EXOFS_COM_H__ -#define __EXOFS_COM_H__ - -#include <linux/types.h> - -#include <scsi/osd_attributes.h> -#include <scsi/osd_initiator.h> -#include <scsi/osd_sec.h> - -/**************************************************************************** - * Object ID related defines - * NOTE: inode# = object ID - EXOFS_OBJ_OFF - ****************************************************************************/ -#define EXOFS_MIN_PID 0x10000 /* Smallest partition ID */ -#define EXOFS_OBJ_OFF 0x10000 /* offset for objects */ -#define EXOFS_SUPER_ID 0x10000 /* object ID for on-disk superblock */ -#define EXOFS_DEVTABLE_ID 0x10001 /* object ID for on-disk device table */ -#define EXOFS_ROOT_ID 0x10002 /* object ID for root directory */ - -/* exofs Application specific page/attribute */ -/* Inode attrs */ -# define EXOFS_APAGE_FS_DATA (OSD_APAGE_APP_DEFINED_FIRST + 3) -# define EXOFS_ATTR_INODE_DATA 1 -# define EXOFS_ATTR_INODE_FILE_LAYOUT 2 -# define EXOFS_ATTR_INODE_DIR_LAYOUT 3 -/* Partition attrs */ -# define EXOFS_APAGE_SB_DATA (0xF0000000U + 3) -# define EXOFS_ATTR_SB_STATS 1 - -/* - * The maximum number of files we can have is limited by the size of the - * inode number. This is the largest object ID that the file system supports. - * Object IDs 0, 1, and 2 are always in use (see above defines). - */ -enum { - EXOFS_MAX_INO_ID = (sizeof(ino_t) * 8 == 64) ? ULLONG_MAX : - (1ULL << (sizeof(ino_t) * 8ULL - 1ULL)), - EXOFS_MAX_ID = (EXOFS_MAX_INO_ID - 1 - EXOFS_OBJ_OFF), -}; - -/**************************************************************************** - * Misc. - ****************************************************************************/ -#define EXOFS_BLKSHIFT 12 -#define EXOFS_BLKSIZE (1UL << EXOFS_BLKSHIFT) - -/**************************************************************************** - * superblock-related things - ****************************************************************************/ -#define EXOFS_SUPER_MAGIC 0x5DF5 - -/* - * The file system control block - stored in object EXOFS_SUPER_ID's data. - * This is where the in-memory superblock is stored on disk. - */ -enum {EXOFS_FSCB_VER = 1, EXOFS_DT_VER = 1}; -struct exofs_fscb { - __le64 s_nextid; /* Only used after mkfs */ - __le64 s_numfiles; /* Only used after mkfs */ - __le32 s_version; /* == EXOFS_FSCB_VER */ - __le16 s_magic; /* Magic signature */ - __le16 s_newfs; /* Non-zero if this is a new fs */ - - /* From here on it's a static part, only written by mkexofs */ - __le64 s_dev_table_oid; /* Resurved, not used */ - __le64 s_dev_table_count; /* == 0 means no dev_table */ -} __packed; - -/* - * This struct is set on the FS partition's attributes. - * [EXOFS_APAGE_SB_DATA, EXOFS_ATTR_SB_STATS] and is written together - * with the create command, to atomically persist the sb writeable information. - */ -struct exofs_sb_stats { - __le64 s_nextid; /* Highest object ID used */ - __le64 s_numfiles; /* Number of files on fs */ -} __packed; - -/* - * Describes the raid used in the FS. It is part of the device table. - * This here is taken from the pNFS-objects definition. In exofs we - * use one raid policy through-out the filesystem. (NOTE: the funny - * alignment at beginning. We take care of it at exofs_device_table. - */ -struct exofs_dt_data_map { - __le32 cb_num_comps; - __le64 cb_stripe_unit; - __le32 cb_group_width; - __le32 cb_group_depth; - __le32 cb_mirror_cnt; - __le32 cb_raid_algorithm; -} __packed; - -/* - * This is an osd device information descriptor. It is a single entry in - * the exofs device table. It describes an osd target lun which - * contains data belonging to this FS. (Same partition_id on all devices) - */ -struct exofs_dt_device_info { - __le32 systemid_len; - u8 systemid[OSD_SYSTEMID_LEN]; - __le64 long_name_offset; /* If !0 then offset-in-file */ - __le32 osdname_len; /* */ - u8 osdname[44]; /* Embbeded, Usually an asci uuid */ -} __packed; - -/* - * The EXOFS device table - stored in object EXOFS_DEVTABLE_ID's data. - * It contains the raid used for this multy-device FS and an array of - * participating devices. - */ -struct exofs_device_table { - __le32 dt_version; /* == EXOFS_DT_VER */ - struct exofs_dt_data_map dt_data_map; /* Raid policy to use */ - - /* Resurved space For future use. Total includeing this: - * (8 * sizeof(le64)) - */ - __le64 __Resurved[4]; - - __le64 dt_num_devices; /* Array size */ - struct exofs_dt_device_info dt_dev_table[]; /* Array of devices */ -} __packed; - -/**************************************************************************** - * inode-related things - ****************************************************************************/ -#define EXOFS_IDATA 5 - -/* - * The file control block - stored in an object's attributes. This is where - * the in-memory inode is stored on disk. - */ -struct exofs_fcb { - __le64 i_size; /* Size of the file */ - __le16 i_mode; /* File mode */ - __le16 i_links_count; /* Links count */ - __le32 i_uid; /* Owner Uid */ - __le32 i_gid; /* Group Id */ - __le32 i_atime; /* Access time */ - __le32 i_ctime; /* Creation time */ - __le32 i_mtime; /* Modification time */ - __le32 i_flags; /* File flags (unused for now)*/ - __le32 i_generation; /* File version (for NFS) */ - __le32 i_data[EXOFS_IDATA]; /* Short symlink names and device #s */ -}; - -#define EXOFS_INO_ATTR_SIZE sizeof(struct exofs_fcb) - -/* This is the Attribute the fcb is stored in */ -static const struct __weak osd_attr g_attr_inode_data = ATTR_DEF( - EXOFS_APAGE_FS_DATA, - EXOFS_ATTR_INODE_DATA, - EXOFS_INO_ATTR_SIZE); - -/**************************************************************************** - * dentry-related things - ****************************************************************************/ -#define EXOFS_NAME_LEN 255 - -/* - * The on-disk directory entry - */ -struct exofs_dir_entry { - __le64 inode_no; /* inode number */ - __le16 rec_len; /* directory entry length */ - u8 name_len; /* name length */ - u8 file_type; /* umm...file type */ - char name[EXOFS_NAME_LEN]; /* file name */ -}; - -enum { - EXOFS_FT_UNKNOWN, - EXOFS_FT_REG_FILE, - EXOFS_FT_DIR, - EXOFS_FT_CHRDEV, - EXOFS_FT_BLKDEV, - EXOFS_FT_FIFO, - EXOFS_FT_SOCK, - EXOFS_FT_SYMLINK, - EXOFS_FT_MAX -}; - -#define EXOFS_DIR_PAD 4 -#define EXOFS_DIR_ROUND (EXOFS_DIR_PAD - 1) -#define EXOFS_DIR_REC_LEN(name_len) \ - (((name_len) + offsetof(struct exofs_dir_entry, name) + \ - EXOFS_DIR_ROUND) & ~EXOFS_DIR_ROUND) - -/* - * The on-disk (optional) layout structure. - * sits in an EXOFS_ATTR_INODE_FILE_LAYOUT or EXOFS_ATTR_INODE_DIR_LAYOUT - * attribute, attached to any inode, usually to a directory. - */ - -enum exofs_inode_layout_gen_functions { - LAYOUT_MOVING_WINDOW = 0, - LAYOUT_IMPLICT = 1, -}; - -struct exofs_on_disk_inode_layout { - __le16 gen_func; /* One of enum exofs_inode_layout_gen_functions */ - __le16 pad; - union { - /* gen_func == LAYOUT_MOVING_WINDOW (default) */ - struct exofs_layout_sliding_window { - __le32 num_devices; /* first n devices in global-table*/ - } sliding_window __packed; - - /* gen_func == LAYOUT_IMPLICT */ - struct exofs_layout_implict_list { - struct exofs_dt_data_map data_map; - /* Variable array of size data_map.cb_num_comps. These - * are device indexes of the devices in the global table - */ - __le32 dev_indexes[]; - } implict __packed; - }; -} __packed; - -static inline size_t exofs_on_disk_inode_layout_size(unsigned max_devs) -{ - return sizeof(struct exofs_on_disk_inode_layout) + - max_devs * sizeof(__le32); -} - -#endif /*ifndef __EXOFS_COM_H__*/ |