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260a980317
Add support for the create, link, symlink, unlink, mkdir, rmdir and
rename VFS operations to the in-kernel AFS filesystem.
Also:
(1) Fix dentry and inode revalidation. d_revalidate should only look at
state of the dentry. Revalidation of the contents of an inode pointed to
by a dentry is now separate.
(2) Fix afs_lookup() to hash negative dentries as well as positive ones.
Signed-off-by: David Howells <dhowells@redhat.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
147 lines
4.7 KiB
C
147 lines
4.7 KiB
C
/* AFS common types
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*
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* Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#ifndef AFS_H
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#define AFS_H
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#include <linux/in.h>
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#define AFS_MAXCELLNAME 64 /* maximum length of a cell name */
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#define AFS_MAXVOLNAME 64 /* maximum length of a volume name */
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typedef unsigned afs_volid_t;
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typedef unsigned afs_vnodeid_t;
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typedef unsigned long long afs_dataversion_t;
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typedef enum {
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AFSVL_RWVOL, /* read/write volume */
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AFSVL_ROVOL, /* read-only volume */
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AFSVL_BACKVOL, /* backup volume */
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} __attribute__((packed)) afs_voltype_t;
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typedef enum {
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AFS_FTYPE_INVALID = 0,
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AFS_FTYPE_FILE = 1,
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AFS_FTYPE_DIR = 2,
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AFS_FTYPE_SYMLINK = 3,
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} afs_file_type_t;
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/*
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* AFS file identifier
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*/
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struct afs_fid {
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afs_volid_t vid; /* volume ID */
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afs_vnodeid_t vnode; /* file index within volume */
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unsigned unique; /* unique ID number (file index version) */
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};
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/*
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* AFS callback notification
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*/
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typedef enum {
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AFSCM_CB_UNTYPED = 0, /* no type set on CB break */
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AFSCM_CB_EXCLUSIVE = 1, /* CB exclusive to CM [not implemented] */
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AFSCM_CB_SHARED = 2, /* CB shared by other CM's */
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AFSCM_CB_DROPPED = 3, /* CB promise cancelled by file server */
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} afs_callback_type_t;
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struct afs_callback {
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struct afs_fid fid; /* file identifier */
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unsigned version; /* callback version */
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unsigned expiry; /* time at which expires */
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afs_callback_type_t type; /* type of callback */
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};
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#define AFSCBMAX 50 /* maximum callbacks transferred per bulk op */
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/*
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* AFS volume information
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*/
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struct afs_volume_info {
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afs_volid_t vid; /* volume ID */
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afs_voltype_t type; /* type of this volume */
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afs_volid_t type_vids[5]; /* volume ID's for possible types for this vol */
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/* list of fileservers serving this volume */
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size_t nservers; /* number of entries used in servers[] */
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struct {
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struct in_addr addr; /* fileserver address */
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} servers[8];
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};
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/*
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* AFS security ACE access mask
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*/
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typedef u32 afs_access_t;
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#define AFS_ACE_READ 0x00000001U /* - permission to read a file/dir */
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#define AFS_ACE_WRITE 0x00000002U /* - permission to write/chmod a file */
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#define AFS_ACE_INSERT 0x00000004U /* - permission to create dirent in a dir */
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#define AFS_ACE_LOOKUP 0x00000008U /* - permission to lookup a file/dir in a dir */
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#define AFS_ACE_DELETE 0x00000010U /* - permission to delete a dirent from a dir */
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#define AFS_ACE_LOCK 0x00000020U /* - permission to lock a file */
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#define AFS_ACE_ADMINISTER 0x00000040U /* - permission to change ACL */
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#define AFS_ACE_USER_A 0x01000000U /* - 'A' user-defined permission */
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#define AFS_ACE_USER_B 0x02000000U /* - 'B' user-defined permission */
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#define AFS_ACE_USER_C 0x04000000U /* - 'C' user-defined permission */
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#define AFS_ACE_USER_D 0x08000000U /* - 'D' user-defined permission */
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#define AFS_ACE_USER_E 0x10000000U /* - 'E' user-defined permission */
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#define AFS_ACE_USER_F 0x20000000U /* - 'F' user-defined permission */
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#define AFS_ACE_USER_G 0x40000000U /* - 'G' user-defined permission */
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#define AFS_ACE_USER_H 0x80000000U /* - 'H' user-defined permission */
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/*
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* AFS file status information
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*/
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struct afs_file_status {
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unsigned if_version; /* interface version */
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#define AFS_FSTATUS_VERSION 1
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afs_file_type_t type; /* file type */
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unsigned nlink; /* link count */
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u64 size; /* file size */
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afs_dataversion_t data_version; /* current data version */
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u32 author; /* author ID */
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u32 owner; /* owner ID */
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u32 group; /* group ID */
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afs_access_t caller_access; /* access rights for authenticated caller */
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afs_access_t anon_access; /* access rights for unauthenticated caller */
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umode_t mode; /* UNIX mode */
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struct afs_fid parent; /* parent dir ID for non-dirs only */
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time_t mtime_client; /* last time client changed data */
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time_t mtime_server; /* last time server changed data */
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};
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/*
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* AFS file status change request
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*/
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struct afs_store_status {
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u32 mask; /* which bits of the struct are set */
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u32 mtime_client; /* last time client changed data */
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u32 owner; /* owner ID */
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u32 group; /* group ID */
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umode_t mode; /* UNIX mode */
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};
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#define AFS_SET_MTIME 0x01 /* set the mtime */
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#define AFS_SET_OWNER 0x02 /* set the owner ID */
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#define AFS_SET_GROUP 0x04 /* set the group ID (unsupported?) */
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#define AFS_SET_MODE 0x08 /* set the UNIX mode */
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#define AFS_SET_SEG_SIZE 0x10 /* set the segment size (unsupported) */
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/*
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* AFS volume synchronisation information
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*/
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struct afs_volsync {
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time_t creation; /* volume creation time */
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};
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#endif /* AFS_H */
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