include/linux/nfsd/nfsd.h

   1 /*
   2  * linux/include/linux/nfsd/nfsd.h
   3  *
   4  * Hodge-podge collection of knfsd-related stuff.
   5  * I will sort this out later.
   6  *
   7  * Copyright (C) 1995-1997 Olaf Kirch <okir@monad.swb.de>
   8  */
   9
  10 #ifndef LINUX_NFSD_NFSD_H
  11 #define LINUX_NFSD_NFSD_H
  12
  13 #include <linux/types.h>
  14 #include <linux/unistd.h>
  15 #include <linux/dirent.h>
  16 #include <linux/fs.h>
  17 #include <linux/posix_acl.h>
  18 #include <linux/mount.h>
  19
  20 #include <linux/nfsd/debug.h>
  21 #include <linux/nfsd/nfsfh.h>
  22 #include <linux/nfsd/export.h>
  23 #include <linux/nfsd/auth.h>
  24 #include <linux/nfsd/stats.h>
  25 /*
  26  * nfsd version
  27  */
  28 #define NFSD_VERSION            "0.5"
  29 #define NFSD_SUPPORTED_MINOR_VERSION    0
  30
  31 #ifdef __KERNEL__
  32 /*
  33  * Special flags for nfsd_permission. These must be different from MAY_READ,
  34  * MAY_WRITE, and MAY_EXEC.
  35  */
  36 #define MAY_NOP                 0
  37 #define MAY_SATTR               8
  38 #define MAY_TRUNC               16
  39 #define MAY_LOCK                32
  40 #define MAY_OWNER_OVERRIDE      64
  41 #define MAY_LOCAL_ACCESS        128 /* IRIX doing local access check on device special file*/
  42 #if (MAY_SATTR | MAY_TRUNC | MAY_LOCK | MAY_OWNER_OVERRIDE | MAY_LOCAL_ACCESS) & (MAY_READ | MAY_WRITE | MAY_EXEC)
  43 # error "please use a different value for MAY_SATTR or MAY_TRUNC or MAY_LOCK or MAY_LOCAL_ACCESS or MAY_OWNER_OVERRIDE."
  44 #endif
  45 #define MAY_CREATE              (MAY_EXEC|MAY_WRITE)
  46 #define MAY_REMOVE              (MAY_EXEC|MAY_WRITE|MAY_TRUNC)
  47
  48 /*
  49  * Callback function for readdir
  50  */
  51 struct readdir_cd {
  52         __be32                  err;    /* 0, nfserr, or nfserr_eof */
  53 };
  54 typedef int (*nfsd_dirop_t)(struct inode *, struct dentry *, int, int);
  55
  56 extern struct svc_program       nfsd_program;
  57 extern struct svc_version       nfsd_version2, nfsd_version3,
  58                                 nfsd_version4;
  59 extern struct svc_serv          *nfsd_serv;
  60 /*
  61  * Function prototypes.
  62  */
  63 int             nfsd_svc(unsigned short port, int nrservs);
  64 int             nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp);
  65
  66 /* nfsd/vfs.c */
  67 int             fh_lock_parent(struct svc_fh *, struct dentry *);
  68 int             nfsd_racache_init(int);
  69 void            nfsd_racache_shutdown(void);
  70 int             nfsd_cross_mnt(struct svc_rqst *rqstp, struct dentry **dpp,
  71                                 struct svc_export **expp);
  72 __be32          nfsd_lookup(struct svc_rqst *, struct svc_fh *,
  73                                 const char *, int, struct svc_fh *);
  74 __be32          nfsd_setattr(struct svc_rqst *, struct svc_fh *,
  75                                 struct iattr *, int, time_t);
  76 #ifdef CONFIG_NFSD_V4
  77 __be32          nfsd4_set_nfs4_acl(struct svc_rqst *, struct svc_fh *,
  78                     struct nfs4_acl *);
  79 int             nfsd4_get_nfs4_acl(struct svc_rqst *, struct dentry *, struct nfs4_acl **);
  80 #endif /* CONFIG_NFSD_V4 */
  81 __be32          nfsd_create(struct svc_rqst *, struct svc_fh *,
  82                                 char *name, int len, struct iattr *attrs,
  83                                 int type, dev_t rdev, struct svc_fh *res);
  84 #ifdef CONFIG_NFSD_V3
  85 __be32          nfsd_access(struct svc_rqst *, struct svc_fh *, u32 *, u32 *);
  86 __be32          nfsd_create_v3(struct svc_rqst *, struct svc_fh *,
  87                                 char *name, int len, struct iattr *attrs,
  88                                 struct svc_fh *res, int createmode,
  89                                 u32 *verifier, int *truncp, int *created);
  90 __be32          nfsd_commit(struct svc_rqst *, struct svc_fh *,
  91                                 loff_t, unsigned long);
  92 #endif /* CONFIG_NFSD_V3 */
  93 __be32          nfsd_open(struct svc_rqst *, struct svc_fh *, int,
  94                                 int, struct file **);
  95 void            nfsd_close(struct file *);
  96 __be32          nfsd_read(struct svc_rqst *, struct svc_fh *, struct file *,
  97                                 loff_t, struct kvec *, int, unsigned long *);
  98 __be32          nfsd_write(struct svc_rqst *, struct svc_fh *,struct file *,
  99                                 loff_t, struct kvec *,int, unsigned long, int *);
 100 __be32          nfsd_readlink(struct svc_rqst *, struct svc_fh *,
 101                                 char *, int *);
 102 __be32          nfsd_symlink(struct svc_rqst *, struct svc_fh *,
 103                                 char *name, int len, char *path, int plen,
 104                                 struct svc_fh *res, struct iattr *);
 105 __be32          nfsd_link(struct svc_rqst *, struct svc_fh *,
 106                                 char *, int, struct svc_fh *);
 107 __be32          nfsd_rename(struct svc_rqst *,
 108                                 struct svc_fh *, char *, int,
 109                                 struct svc_fh *, char *, int);
 110 __be32          nfsd_remove(struct svc_rqst *,
 111                                 struct svc_fh *, char *, int);
 112 __be32          nfsd_unlink(struct svc_rqst *, struct svc_fh *, int type,
 113                                 char *name, int len);
 114 int             nfsd_truncate(struct svc_rqst *, struct svc_fh *,
 115                                 unsigned long size);
 116 __be32          nfsd_readdir(struct svc_rqst *, struct svc_fh *,
 117                              loff_t *, struct readdir_cd *, filldir_t);
 118 __be32          nfsd_statfs(struct svc_rqst *, struct svc_fh *,
 119                                 struct kstatfs *);
 120
 121 int             nfsd_notify_change(struct inode *, struct iattr *);
 122 __be32          nfsd_permission(struct svc_export *, struct dentry *, int);
 123 int             nfsd_sync_dir(struct dentry *dp);
 124
 125 #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
 126 #ifdef CONFIG_NFSD_V2_ACL
 127 extern struct svc_version nfsd_acl_version2;
 128 #else
 129 #define nfsd_acl_version2 NULL
 130 #endif
 131 #ifdef CONFIG_NFSD_V3_ACL
 132 extern struct svc_version nfsd_acl_version3;
 133 #else
 134 #define nfsd_acl_version3 NULL
 135 #endif
 136 struct posix_acl *nfsd_get_posix_acl(struct svc_fh *, int);
 137 int nfsd_set_posix_acl(struct svc_fh *, int, struct posix_acl *);
 138 #endif
 139
 140 enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };
 141 int nfsd_vers(int vers, enum vers_op change);
 142 void nfsd_reset_versions(void);
 143 int nfsd_create_serv(void);
 144
 145 extern int nfsd_max_blksize;
 146
 147 /*
 148  * NFSv4 State
 149  */
 150 #ifdef CONFIG_NFSD_V4
 151 extern unsigned int max_delegations;
 152 void nfs4_state_init(void);
 153 int nfs4_state_start(void);
 154 void nfs4_state_shutdown(void);
 155 time_t nfs4_lease_time(void);
 156 void nfs4_reset_lease(time_t leasetime);
 157 int nfs4_reset_recoverydir(char *recdir);
 158 #else
 159 static inline void nfs4_state_init(void){};
 160 static inline int nfs4_state_start(void){return 0;}
 161 static inline void nfs4_state_shutdown(void){}
 162 static inline time_t nfs4_lease_time(void){return 0;}
 163 static inline void nfs4_reset_lease(time_t leasetime){}
 164 static inline int nfs4_reset_recoverydir(char *recdir) {return 0;}
 165 #endif
 166
 167 /*
 168  * lockd binding
 169  */
 170 void            nfsd_lockd_init(void);
 171 void            nfsd_lockd_shutdown(void);
 172
 173
 174 /*
 175  * These macros provide pre-xdr'ed values for faster operation.
 176  */
 177 #define nfs_ok                  __constant_htonl(NFS_OK)
 178 #define nfserr_perm             __constant_htonl(NFSERR_PERM)
 179 #define nfserr_noent            __constant_htonl(NFSERR_NOENT)
 180 #define nfserr_io               __constant_htonl(NFSERR_IO)
 181 #define nfserr_nxio             __constant_htonl(NFSERR_NXIO)
 182 #define nfserr_eagain           __constant_htonl(NFSERR_EAGAIN)
 183 #define nfserr_acces            __constant_htonl(NFSERR_ACCES)
 184 #define nfserr_exist            __constant_htonl(NFSERR_EXIST)
 185 #define nfserr_xdev             __constant_htonl(NFSERR_XDEV)
 186 #define nfserr_nodev            __constant_htonl(NFSERR_NODEV)
 187 #define nfserr_notdir           __constant_htonl(NFSERR_NOTDIR)
 188 #define nfserr_isdir            __constant_htonl(NFSERR_ISDIR)
 189 #define nfserr_inval            __constant_htonl(NFSERR_INVAL)
 190 #define nfserr_fbig             __constant_htonl(NFSERR_FBIG)
 191 #define nfserr_nospc            __constant_htonl(NFSERR_NOSPC)
 192 #define nfserr_rofs             __constant_htonl(NFSERR_ROFS)
 193 #define nfserr_mlink            __constant_htonl(NFSERR_MLINK)
 194 #define nfserr_opnotsupp        __constant_htonl(NFSERR_OPNOTSUPP)
 195 #define nfserr_nametoolong      __constant_htonl(NFSERR_NAMETOOLONG)
 196 #define nfserr_notempty         __constant_htonl(NFSERR_NOTEMPTY)
 197 #define nfserr_dquot            __constant_htonl(NFSERR_DQUOT)
 198 #define nfserr_stale            __constant_htonl(NFSERR_STALE)
 199 #define nfserr_remote           __constant_htonl(NFSERR_REMOTE)
 200 #define nfserr_wflush           __constant_htonl(NFSERR_WFLUSH)
 201 #define nfserr_badhandle        __constant_htonl(NFSERR_BADHANDLE)
 202 #define nfserr_notsync          __constant_htonl(NFSERR_NOT_SYNC)
 203 #define nfserr_badcookie        __constant_htonl(NFSERR_BAD_COOKIE)
 204 #define nfserr_notsupp          __constant_htonl(NFSERR_NOTSUPP)
 205 #define nfserr_toosmall         __constant_htonl(NFSERR_TOOSMALL)
 206 #define nfserr_serverfault      __constant_htonl(NFSERR_SERVERFAULT)
 207 #define nfserr_badtype          __constant_htonl(NFSERR_BADTYPE)
 208 #define nfserr_jukebox          __constant_htonl(NFSERR_JUKEBOX)
 209 #define nfserr_denied           __constant_htonl(NFSERR_DENIED)
 210 #define nfserr_deadlock         __constant_htonl(NFSERR_DEADLOCK)
 211 #define nfserr_expired          __constant_htonl(NFSERR_EXPIRED)
 212 #define nfserr_bad_cookie       __constant_htonl(NFSERR_BAD_COOKIE)
 213 #define nfserr_same             __constant_htonl(NFSERR_SAME)
 214 #define nfserr_clid_inuse       __constant_htonl(NFSERR_CLID_INUSE)
 215 #define nfserr_stale_clientid   __constant_htonl(NFSERR_STALE_CLIENTID)
 216 #define nfserr_resource         __constant_htonl(NFSERR_RESOURCE)
 217 #define nfserr_moved            __constant_htonl(NFSERR_MOVED)
 218 #define nfserr_nofilehandle     __constant_htonl(NFSERR_NOFILEHANDLE)
 219 #define nfserr_minor_vers_mismatch      __constant_htonl(NFSERR_MINOR_VERS_MISMATCH)
 220 #define nfserr_share_denied     __constant_htonl(NFSERR_SHARE_DENIED)
 221 #define nfserr_stale_stateid    __constant_htonl(NFSERR_STALE_STATEID)
 222 #define nfserr_old_stateid      __constant_htonl(NFSERR_OLD_STATEID)
 223 #define nfserr_bad_stateid      __constant_htonl(NFSERR_BAD_STATEID)
 224 #define nfserr_bad_seqid        __constant_htonl(NFSERR_BAD_SEQID)
 225 #define nfserr_symlink          __constant_htonl(NFSERR_SYMLINK)
 226 #define nfserr_not_same         __constant_htonl(NFSERR_NOT_SAME)
 227 #define nfserr_restorefh        __constant_htonl(NFSERR_RESTOREFH)
 228 #define nfserr_attrnotsupp      __constant_htonl(NFSERR_ATTRNOTSUPP)
 229 #define nfserr_bad_xdr          __constant_htonl(NFSERR_BAD_XDR)
 230 #define nfserr_openmode         __constant_htonl(NFSERR_OPENMODE)
 231 #define nfserr_locks_held       __constant_htonl(NFSERR_LOCKS_HELD)
 232 #define nfserr_op_illegal       __constant_htonl(NFSERR_OP_ILLEGAL)
 233 #define nfserr_grace            __constant_htonl(NFSERR_GRACE)
 234 #define nfserr_no_grace         __constant_htonl(NFSERR_NO_GRACE)
 235 #define nfserr_reclaim_bad      __constant_htonl(NFSERR_RECLAIM_BAD)
 236 #define nfserr_badname          __constant_htonl(NFSERR_BADNAME)
 237 #define nfserr_cb_path_down     __constant_htonl(NFSERR_CB_PATH_DOWN)
 238 #define nfserr_locked           __constant_htonl(NFSERR_LOCKED)
 239 #define nfserr_wrongsec         __constant_htonl(NFSERR_WRONGSEC)
 240 #define nfserr_replay_me        __constant_htonl(NFSERR_REPLAY_ME)
 241
 242 /* error codes for internal use */
 243 /* if a request fails due to kmalloc failure, it gets dropped.
 244  *  Client should resend eventually
 245  */
 246 #define nfserr_dropit           __constant_htonl(30000)
 247 /* end-of-file indicator in readdir */
 248 #define nfserr_eof              __constant_htonl(30001)
 249
 250 /* Check for dir entries '.' and '..' */
 251 #define isdotent(n, l)  (l < 3 && n[0] == '.' && (l == 1 || n[1] == '.'))
 252
 253 /*
 254  * Time of server startup
 255  */
 256 extern struct timeval   nfssvc_boot;
 257
 258 #ifdef CONFIG_NFSD_V4
 259
 260 /* before processing a COMPOUND operation, we have to check that there
 261  * is enough space in the buffer for XDR encode to succeed.  otherwise,
 262  * we might process an operation with side effects, and be unable to
 263  * tell the client that the operation succeeded.
 264  *
 265  * COMPOUND_SLACK_SPACE - this is the minimum bytes of buffer space
 266  * needed to encode an "ordinary" _successful_ operation.  (GETATTR,
 267  * READ, READDIR, and READLINK have their own buffer checks.)  if we
 268  * fall below this level, we fail the next operation with NFS4ERR_RESOURCE.
 269  *
 270  * COMPOUND_ERR_SLACK_SPACE - this is the minimum bytes of buffer space
 271  * needed to encode an operation which has failed with NFS4ERR_RESOURCE.
 272  * care is taken to ensure that we never fall below this level for any
 273  * reason.
 274  */
 275 #define COMPOUND_SLACK_SPACE            140    /* OP_GETFH */
 276 #define COMPOUND_ERR_SLACK_SPACE        12     /* OP_SETATTR */
 277
 278 #define NFSD_LEASE_TIME                 (nfs4_lease_time())
 279 #define NFSD_LAUNDROMAT_MINTIMEOUT      10   /* seconds */
 280
 281 /*
 282  * The following attributes are currently not supported by the NFSv4 server:
 283  *    ARCHIVE       (deprecated anyway)
 284  *    HIDDEN        (unlikely to be supported any time soon)
 285  *    MIMETYPE      (unlikely to be supported any time soon)
 286  *    QUOTA_*       (will be supported in a forthcoming patch)
 287  *    SYSTEM        (unlikely to be supported any time soon)
 288  *    TIME_BACKUP   (unlikely to be supported any time soon)
 289  *    TIME_CREATE   (unlikely to be supported any time soon)
 290  */
 291 #define NFSD_SUPPORTED_ATTRS_WORD0                                                          \
 292 (FATTR4_WORD0_SUPPORTED_ATTRS   | FATTR4_WORD0_TYPE         | FATTR4_WORD0_FH_EXPIRE_TYPE   \
 293  | FATTR4_WORD0_CHANGE          | FATTR4_WORD0_SIZE         | FATTR4_WORD0_LINK_SUPPORT     \
 294  | FATTR4_WORD0_SYMLINK_SUPPORT | FATTR4_WORD0_NAMED_ATTR   | FATTR4_WORD0_FSID             \
 295  | FATTR4_WORD0_UNIQUE_HANDLES  | FATTR4_WORD0_LEASE_TIME   | FATTR4_WORD0_RDATTR_ERROR     \
 296  | FATTR4_WORD0_ACLSUPPORT      | FATTR4_WORD0_CANSETTIME   | FATTR4_WORD0_CASE_INSENSITIVE \
 297  | FATTR4_WORD0_CASE_PRESERVING | FATTR4_WORD0_CHOWN_RESTRICTED                             \
 298  | FATTR4_WORD0_FILEHANDLE      | FATTR4_WORD0_FILEID       | FATTR4_WORD0_FILES_AVAIL      \
 299  | FATTR4_WORD0_FILES_FREE      | FATTR4_WORD0_FILES_TOTAL  | FATTR4_WORD0_FS_LOCATIONS | FATTR4_WORD0_HOMOGENEOUS      \
 300  | FATTR4_WORD0_MAXFILESIZE     | FATTR4_WORD0_MAXLINK      | FATTR4_WORD0_MAXNAME          \
 301  | FATTR4_WORD0_MAXREAD         | FATTR4_WORD0_MAXWRITE     | FATTR4_WORD0_ACL)
 302
 303 #define NFSD_SUPPORTED_ATTRS_WORD1                                                          \
 304 (FATTR4_WORD1_MODE              | FATTR4_WORD1_NO_TRUNC     | FATTR4_WORD1_NUMLINKS         \
 305  | FATTR4_WORD1_OWNER           | FATTR4_WORD1_OWNER_GROUP  | FATTR4_WORD1_RAWDEV           \
 306  | FATTR4_WORD1_SPACE_AVAIL     | FATTR4_WORD1_SPACE_FREE   | FATTR4_WORD1_SPACE_TOTAL      \
 307  | FATTR4_WORD1_SPACE_USED      | FATTR4_WORD1_TIME_ACCESS  | FATTR4_WORD1_TIME_ACCESS_SET  \
 308  | FATTR4_WORD1_TIME_DELTA   | FATTR4_WORD1_TIME_METADATA    \
 309  | FATTR4_WORD1_TIME_MODIFY     | FATTR4_WORD1_TIME_MODIFY_SET | FATTR4_WORD1_MOUNTED_ON_FILEID)
 310
 311 /* These will return ERR_INVAL if specified in GETATTR or READDIR. */
 312 #define NFSD_WRITEONLY_ATTRS_WORD1                                                          \
 313 (FATTR4_WORD1_TIME_ACCESS_SET   | FATTR4_WORD1_TIME_MODIFY_SET)
 314
 315 /* These are the only attrs allowed in CREATE/OPEN/SETATTR. */
 316 #define NFSD_WRITEABLE_ATTRS_WORD0                                                          \
 317 (FATTR4_WORD0_SIZE              | FATTR4_WORD0_ACL                                         )
 318 #define NFSD_WRITEABLE_ATTRS_WORD1                                                          \
 319 (FATTR4_WORD1_MODE              | FATTR4_WORD1_OWNER         | FATTR4_WORD1_OWNER_GROUP     \
 320  | FATTR4_WORD1_TIME_ACCESS_SET | FATTR4_WORD1_TIME_METADATA | FATTR4_WORD1_TIME_MODIFY_SET)
 321
 322 #endif /* CONFIG_NFSD_V4 */
 323
 324 #endif /* __KERNEL__ */
 325
 326 #endif /* LINUX_NFSD_NFSD_H */