source3/include/vfs.h

   1 /*
   2    Unix SMB/CIFS implementation.
   3    VFS structures and parameters
   4    Copyright (C) Jeremy Allison                         1999-2005
   5    Copyright (C) Tim Potter                             1999
   6    Copyright (C) Alexander Bokovoy                      2002-2005
   7    Copyright (C) Stefan (metze) Metzmacher              2003
   8
   9    This program is free software; you can redistribute it and/or modify
  10    it under the terms of the GNU General Public License as published by
  11    the Free Software Foundation; either version 2 of the License, or
  12    (at your option) any later version.
  13
  14    This program is distributed in the hope that it will be useful,
  15    but WITHOUT ANY WARRANTY; without even the implied warranty of
  16    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17    GNU General Public License for more details.
  18
  19    You should have received a copy of the GNU General Public License
  20    along with this program; if not, write to the Free Software
  21    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  22
  23    This work was sponsored by Optifacio Software Services, Inc.
  24 */
  25
  26 #ifndef _VFS_H
  27 #define _VFS_H
  28
  29 /* Avoid conflict with an AIX include file */
  30
  31 #ifdef vfs_ops
  32 #undef vfs_ops
  33 #endif
  34
  35 /*
  36  * As we're now (thanks Andrew ! :-) using file_structs and connection
  37  * structs in the vfs - then anyone writing a vfs must include includes.h...
  38  */
  39
  40 /*
  41  * This next constant specifies the version number of the VFS interface
  42  * this smbd will load. Increment this if *ANY* changes are made to the
  43  * vfs_ops below. JRA.
  44  *
  45  * If you change anything here, please also update modules/vfs_full_audit.c.
  46  * VL.
  47  */
  48
  49 /* Changed to version 2 for CIFS UNIX extensions (mknod and link added). JRA. */
  50 /* Changed to version 3 for POSIX acl extensions. JRA. */
  51 /* Changed to version 4 for cascaded VFS interface. Alexander Bokovoy. */
  52 /* Changed to version 5 for sendfile addition. JRA. */
  53 /* Changed to version 6 for the new module system, fixed cascading and quota functions. --metze */
  54 /* Changed to version 7 to include the get_nt_acl info parameter. JRA. */
  55 /* Changed to version 8 includes EA calls. JRA. */
  56 /* Changed to version 9 to include the get_shadow_data call. --metze */
  57 /* Changed to version 10 to include pread/pwrite calls. */
  58 /* Changed to version 11 to include seekdir/telldir/rewinddir calls. JRA */
  59 /* Changed to version 12 to add mask and attributes to opendir(). JRA
  60    Also include aio calls. JRA. */
  61 /* Changed to version 13 as the internal structure of files_struct has changed. JRA */
  62 /* Changed to version 14 as we had to change DIR to SMB_STRUCT_DIR. JRA */
  63 /* Changed to version 15 as we added the statvfs call. JRA */
  64 /* Changed to version 16 as we added the getlock call. JRA */
  65 /* Changed to version 17 as we removed redundant connection_struct parameters. --jpeach */
  66 /* Changed to version 18 to add fsp parameter to the open call -- jpeach */
  67 #define SMB_VFS_INTERFACE_VERSION 18
  68
  69
  70 /* to bug old modules which are trying to compile with the old functions */
  71 #define vfs_init __ERROR_please_port_this_module_to_SMB_VFS_INTERFACE_VERSION_8_donot_use_vfs_init_anymore(void) { __ERROR_please_port_this_module_to_SMB_VFS_INTERFACE_VERSION_8_donot_use_vfs_init_anymore };
  72 #define lp_parm_string __ERROR_please_port_lp_parm_string_to_lp_parm_const_string_or_lp_parm_talloc_string { \
  73   __ERROR_please_port_lp_parm_string_to_lp_parm_const_string_or_lp_parm_talloc_string };
  74 #define lp_vfs_options __ERROR_please_donot_use_lp_vfs_options_anymore_use_lp_parm_xxxx_functions_instead { \
  75   __ERROR_please_donot_use_lp_vfs_options_anymore_use_lp_parm_xxxx_functions_instead };
  76
  77 /*
  78     All intercepted VFS operations must be declared as static functions inside module source
  79     in order to keep smbd namespace unpolluted. See source of audit, extd_audit, fake_perms and recycle
  80     example VFS modules for more details.
  81 */
  82
  83 /* VFS operations structure */
  84
  85 struct vfs_handle_struct;
  86 struct connection_struct;
  87 struct files_struct;
  88 struct security_descriptor;
  89 struct vfs_statvfs_struct;
  90
  91 /*
  92     Available VFS operations. These values must be in sync with vfs_ops struct
  93     (struct vfs_fn_pointers and struct vfs_handle_pointers inside of struct vfs_ops).
  94     In particular, if new operations are added to vfs_ops, appropriate constants
  95     should be added to vfs_op_type so that order of them kept same as in vfs_ops.
  96 */
  97
  98 typedef enum _vfs_op_type {
  99         SMB_VFS_OP_NOOP = -1,
 100
 101         /* Disk operations */
 102
 103         SMB_VFS_OP_CONNECT = 0,
 104         SMB_VFS_OP_DISCONNECT,
 105         SMB_VFS_OP_DISK_FREE,
 106         SMB_VFS_OP_GET_QUOTA,
 107         SMB_VFS_OP_SET_QUOTA,
 108         SMB_VFS_OP_GET_SHADOW_COPY_DATA,
 109         SMB_VFS_OP_STATVFS,
 110
 111         /* Directory operations */
 112
 113         SMB_VFS_OP_OPENDIR,
 114         SMB_VFS_OP_READDIR,
 115         SMB_VFS_OP_SEEKDIR,
 116         SMB_VFS_OP_TELLDIR,
 117         SMB_VFS_OP_REWINDDIR,
 118         SMB_VFS_OP_MKDIR,
 119         SMB_VFS_OP_RMDIR,
 120         SMB_VFS_OP_CLOSEDIR,
 121
 122         /* File operations */
 123
 124         SMB_VFS_OP_OPEN,
 125         SMB_VFS_OP_CLOSE,
 126         SMB_VFS_OP_READ,
 127         SMB_VFS_OP_PREAD,
 128         SMB_VFS_OP_WRITE,
 129         SMB_VFS_OP_PWRITE,
 130         SMB_VFS_OP_LSEEK,
 131         SMB_VFS_OP_SENDFILE,
 132         SMB_VFS_OP_RENAME,
 133         SMB_VFS_OP_FSYNC,
 134         SMB_VFS_OP_STAT,
 135         SMB_VFS_OP_FSTAT,
 136         SMB_VFS_OP_LSTAT,
 137         SMB_VFS_OP_UNLINK,
 138         SMB_VFS_OP_CHMOD,
 139         SMB_VFS_OP_FCHMOD,
 140         SMB_VFS_OP_CHOWN,
 141         SMB_VFS_OP_FCHOWN,
 142         SMB_VFS_OP_CHDIR,
 143         SMB_VFS_OP_GETWD,
 144         SMB_VFS_OP_UTIME,
 145         SMB_VFS_OP_FTRUNCATE,
 146         SMB_VFS_OP_LOCK,
 147         SMB_VFS_OP_GETLOCK,
 148         SMB_VFS_OP_SYMLINK,
 149         SMB_VFS_OP_READLINK,
 150         SMB_VFS_OP_LINK,
 151         SMB_VFS_OP_MKNOD,
 152         SMB_VFS_OP_REALPATH,
 153
 154         /* NT ACL operations. */
 155
 156         SMB_VFS_OP_FGET_NT_ACL,
 157         SMB_VFS_OP_GET_NT_ACL,
 158         SMB_VFS_OP_FSET_NT_ACL,
 159         SMB_VFS_OP_SET_NT_ACL,
 160
 161         /* POSIX ACL operations. */
 162
 163         SMB_VFS_OP_CHMOD_ACL,
 164         SMB_VFS_OP_FCHMOD_ACL,
 165
 166         SMB_VFS_OP_SYS_ACL_GET_ENTRY,
 167         SMB_VFS_OP_SYS_ACL_GET_TAG_TYPE,
 168         SMB_VFS_OP_SYS_ACL_GET_PERMSET,
 169         SMB_VFS_OP_SYS_ACL_GET_QUALIFIER,
 170         SMB_VFS_OP_SYS_ACL_GET_FILE,
 171         SMB_VFS_OP_SYS_ACL_GET_FD,
 172         SMB_VFS_OP_SYS_ACL_CLEAR_PERMS,
 173         SMB_VFS_OP_SYS_ACL_ADD_PERM,
 174         SMB_VFS_OP_SYS_ACL_TO_TEXT,
 175         SMB_VFS_OP_SYS_ACL_INIT,
 176         SMB_VFS_OP_SYS_ACL_CREATE_ENTRY,
 177         SMB_VFS_OP_SYS_ACL_SET_TAG_TYPE,
 178         SMB_VFS_OP_SYS_ACL_SET_QUALIFIER,
 179         SMB_VFS_OP_SYS_ACL_SET_PERMSET,
 180         SMB_VFS_OP_SYS_ACL_VALID,
 181         SMB_VFS_OP_SYS_ACL_SET_FILE,
 182         SMB_VFS_OP_SYS_ACL_SET_FD,
 183         SMB_VFS_OP_SYS_ACL_DELETE_DEF_FILE,
 184         SMB_VFS_OP_SYS_ACL_GET_PERM,
 185         SMB_VFS_OP_SYS_ACL_FREE_TEXT,
 186         SMB_VFS_OP_SYS_ACL_FREE_ACL,
 187         SMB_VFS_OP_SYS_ACL_FREE_QUALIFIER,
 188
 189         /* EA operations. */
 190         SMB_VFS_OP_GETXATTR,
 191         SMB_VFS_OP_LGETXATTR,
 192         SMB_VFS_OP_FGETXATTR,
 193         SMB_VFS_OP_LISTXATTR,
 194         SMB_VFS_OP_LLISTXATTR,
 195         SMB_VFS_OP_FLISTXATTR,
 196         SMB_VFS_OP_REMOVEXATTR,
 197         SMB_VFS_OP_LREMOVEXATTR,
 198         SMB_VFS_OP_FREMOVEXATTR,
 199         SMB_VFS_OP_SETXATTR,
 200         SMB_VFS_OP_LSETXATTR,
 201         SMB_VFS_OP_FSETXATTR,
 202
 203         /* aio operations */
 204         SMB_VFS_OP_AIO_READ,
 205         SMB_VFS_OP_AIO_WRITE,
 206         SMB_VFS_OP_AIO_RETURN,
 207         SMB_VFS_OP_AIO_CANCEL,
 208         SMB_VFS_OP_AIO_ERROR,
 209         SMB_VFS_OP_AIO_FSYNC,
 210         SMB_VFS_OP_AIO_SUSPEND,
 211
 212         /* This should always be last enum value */
 213
 214         SMB_VFS_OP_LAST
 215 } vfs_op_type;
 216
 217 /*
 218     Please keep vfs_op_type, struct vfs_fn_pointers and struct vfs_handles_pointers in sync.
 219 */
 220 struct vfs_ops {
 221         struct vfs_fn_pointers {
 222                 /* Disk operations */
 223
 224                 int (*connect_fn)(struct vfs_handle_struct *handle, const char *service, const char *user);
 225                 void (*disconnect)(struct vfs_handle_struct *handle);
 226                 SMB_BIG_UINT (*disk_free)(struct vfs_handle_struct *handle, const char *path, BOOL small_query, SMB_BIG_UINT *bsize,
 227                         SMB_BIG_UINT *dfree, SMB_BIG_UINT *dsize);
 228                 int (*get_quota)(struct vfs_handle_struct *handle, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *qt);
 229                 int (*set_quota)(struct vfs_handle_struct *handle, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *qt);
 230                 int (*get_shadow_copy_data)(struct vfs_handle_struct *handle, struct files_struct *fsp, SHADOW_COPY_DATA *shadow_copy_data, BOOL labels);
 231                 int (*statvfs)(struct vfs_handle_struct *handle, const char *path, struct vfs_statvfs_struct *statbuf);
 232
 233                 /* Directory operations */
 234
 235                 SMB_STRUCT_DIR *(*opendir)(struct vfs_handle_struct *handle, const char *fname, const char *mask, uint32 attributes);
 236                 SMB_STRUCT_DIRENT *(*readdir)(struct vfs_handle_struct *handle, SMB_STRUCT_DIR *dirp);
 237                 void (*seekdir)(struct vfs_handle_struct *handle, SMB_STRUCT_DIR *dirp, long offset);
 238                 long (*telldir)(struct vfs_handle_struct *handle, SMB_STRUCT_DIR *dirp);
 239                 void (*rewind_dir)(struct vfs_handle_struct *handle, SMB_STRUCT_DIR *dirp);
 240                 int (*mkdir)(struct vfs_handle_struct *handle, const char *path, mode_t mode);
 241                 int (*rmdir)(struct vfs_handle_struct *handle, const char *path);
 242                 int (*closedir)(struct vfs_handle_struct *handle, SMB_STRUCT_DIR *dir);
 243
 244                 /* File operations */
 245
 246                 int (*open)(struct vfs_handle_struct *handle, const char *fname, files_struct *fsp, int flags, mode_t mode);
 247                 int (*close_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd);
 248                 ssize_t (*read)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, void *data, size_t n);
 249                 ssize_t (*pread)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, void *data, size_t n, SMB_OFF_T offset);
 250                 ssize_t (*write)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, const void *data, size_t n);
 251                 ssize_t (*pwrite)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, const void *data, size_t n, SMB_OFF_T offset);
 252                 SMB_OFF_T (*lseek)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, SMB_OFF_T offset, int whence);
 253                 ssize_t (*sendfile)(struct vfs_handle_struct *handle, int tofd, files_struct *fsp, int fromfd, const DATA_BLOB *header, SMB_OFF_T offset, size_t count);
 254                 int (*rename)(struct vfs_handle_struct *handle, const char *oldname, const char *newname);
 255                 int (*fsync)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd);
 256                 int (*stat)(struct vfs_handle_struct *handle, const char *fname, SMB_STRUCT_STAT *sbuf);
 257                 int (*fstat)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, SMB_STRUCT_STAT *sbuf);
 258                 int (*lstat)(struct vfs_handle_struct *handle, const char *path, SMB_STRUCT_STAT *sbuf);
 259                 int (*unlink)(struct vfs_handle_struct *handle, const char *path);
 260                 int (*chmod)(struct vfs_handle_struct *handle, const char *path, mode_t mode);
 261                 int (*fchmod)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, mode_t mode);
 262                 int (*chown)(struct vfs_handle_struct *handle, const char *path, uid_t uid, gid_t gid);
 263                 int (*fchown)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, uid_t uid, gid_t gid);
 264                 int (*chdir)(struct vfs_handle_struct *handle, const char *path);
 265                 char *(*getwd)(struct vfs_handle_struct *handle, char *buf);
 266                 int (*utime)(struct vfs_handle_struct *handle, const char *path, struct utimbuf *times);
 267                 int (*ftruncate)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, SMB_OFF_T offset);
 268                 BOOL (*lock)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, int op, SMB_OFF_T offset, SMB_OFF_T count, int type);
 269                 BOOL (*getlock)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, SMB_OFF_T *poffset, SMB_OFF_T *pcount, int *ptype, pid_t *ppid);
 270                 int (*symlink)(struct vfs_handle_struct *handle, const char *oldpath, const char *newpath);
 271                 int (*readlink)(struct vfs_handle_struct *handle, const char *path, char *buf, size_t bufsiz);
 272                 int (*link)(struct vfs_handle_struct *handle, const char *oldpath, const char *newpath);
 273                 int (*mknod)(struct vfs_handle_struct *handle, const char *path, mode_t mode, SMB_DEV_T dev);
 274                 char *(*realpath)(struct vfs_handle_struct *handle, const char *path, char *resolved_path);
 275
 276                 /* NT ACL operations. */
 277
 278                 size_t (*fget_nt_acl)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd,  uint32 security_info, struct security_descriptor **ppdesc);
 279                 size_t (*get_nt_acl)(struct vfs_handle_struct *handle, struct files_struct *fsp, const char *name,  uint32 security_info, struct security_descriptor **ppdesc);
 280                 BOOL (*fset_nt_acl)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, uint32 security_info_sent, struct security_descriptor *psd);
 281                 BOOL (*set_nt_acl)(struct vfs_handle_struct *handle, struct files_struct *fsp, const char *name, uint32 security_info_sent, struct security_descriptor *psd);
 282
 283                 /* POSIX ACL operations. */
 284
 285                 int (*chmod_acl)(struct vfs_handle_struct *handle, const char *name, mode_t mode);
 286                 int (*fchmod_acl)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, mode_t mode);
 287
 288                 int (*sys_acl_get_entry)(struct vfs_handle_struct *handle, SMB_ACL_T theacl, int entry_id, SMB_ACL_ENTRY_T *entry_p);
 289                 int (*sys_acl_get_tag_type)(struct vfs_handle_struct *handle, SMB_ACL_ENTRY_T entry_d, SMB_ACL_TAG_T *tag_type_p);
 290                 int (*sys_acl_get_permset)(struct vfs_handle_struct *handle, SMB_ACL_ENTRY_T entry_d, SMB_ACL_PERMSET_T *permset_p);
 291                 void * (*sys_acl_get_qualifier)(struct vfs_handle_struct *handle, SMB_ACL_ENTRY_T entry_d);
 292                 SMB_ACL_T (*sys_acl_get_file)(struct vfs_handle_struct *handle, const char *path_p, SMB_ACL_TYPE_T type);
 293                 SMB_ACL_T (*sys_acl_get_fd)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd);
 294                 int (*sys_acl_clear_perms)(struct vfs_handle_struct *handle, SMB_ACL_PERMSET_T permset);
 295                 int (*sys_acl_add_perm)(struct vfs_handle_struct *handle, SMB_ACL_PERMSET_T permset, SMB_ACL_PERM_T perm);
 296                 char * (*sys_acl_to_text)(struct vfs_handle_struct *handle, SMB_ACL_T theacl, ssize_t *plen);
 297                 SMB_ACL_T (*sys_acl_init)(struct vfs_handle_struct *handle, int count);
 298                 int (*sys_acl_create_entry)(struct vfs_handle_struct *handle, SMB_ACL_T *pacl, SMB_ACL_ENTRY_T *pentry);
 299                 int (*sys_acl_set_tag_type)(struct vfs_handle_struct *handle, SMB_ACL_ENTRY_T entry, SMB_ACL_TAG_T tagtype);
 300                 int (*sys_acl_set_qualifier)(struct vfs_handle_struct *handle, SMB_ACL_ENTRY_T entry, void *qual);
 301                 int (*sys_acl_set_permset)(struct vfs_handle_struct *handle, SMB_ACL_ENTRY_T entry, SMB_ACL_PERMSET_T permset);
 302                 int (*sys_acl_valid)(struct vfs_handle_struct *handle, SMB_ACL_T theacl );
 303                 int (*sys_acl_set_file)(struct vfs_handle_struct *handle, const char *name, SMB_ACL_TYPE_T acltype, SMB_ACL_T theacl);
 304                 int (*sys_acl_set_fd)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, SMB_ACL_T theacl);
 305                 int (*sys_acl_delete_def_file)(struct vfs_handle_struct *handle, const char *path);
 306                 int (*sys_acl_get_perm)(struct vfs_handle_struct *handle, SMB_ACL_PERMSET_T permset, SMB_ACL_PERM_T perm);
 307                 int (*sys_acl_free_text)(struct vfs_handle_struct *handle, char *text);
 308                 int (*sys_acl_free_acl)(struct vfs_handle_struct *handle, SMB_ACL_T posix_acl);
 309                 int (*sys_acl_free_qualifier)(struct vfs_handle_struct *handle, void *qualifier, SMB_ACL_TAG_T tagtype);
 310
 311                 /* EA operations. */
 312                 ssize_t (*getxattr)(struct vfs_handle_struct *handle,const char *path, const char *name, void *value, size_t size);
 313                 ssize_t (*lgetxattr)(struct vfs_handle_struct *handle,const char *path, const char *name, void *value, size_t size);
 314                 ssize_t (*fgetxattr)(struct vfs_handle_struct *handle, struct files_struct *fsp,int fd, const char *name, void *value, size_t size);
 315                 ssize_t (*listxattr)(struct vfs_handle_struct *handle, const char *path, char *list, size_t size);
 316                 ssize_t (*llistxattr)(struct vfs_handle_struct *handle, const char *path, char *list, size_t size);
 317                 ssize_t (*flistxattr)(struct vfs_handle_struct *handle, struct files_struct *fsp,int fd, char *list, size_t size);
 318                 int (*removexattr)(struct vfs_handle_struct *handle, const char *path, const char *name);
 319                 int (*lremovexattr)(struct vfs_handle_struct *handle, const char *path, const char *name);
 320                 int (*fremovexattr)(struct vfs_handle_struct *handle, struct files_struct *fsp,int filedes, const char *name);
 321                 int (*setxattr)(struct vfs_handle_struct *handle, const char *path, const char *name, const void *value, size_t size, int flags);
 322                 int (*lsetxattr)(struct vfs_handle_struct *handle, const char *path, const char *name, const void *value, size_t size, int flags);
 323                 int (*fsetxattr)(struct vfs_handle_struct *handle, struct files_struct *fsp,int filedes, const char *name, const void *value, size_t size, int flags);
 324
 325                 /* aio operations */
 326                 int (*aio_read)(struct vfs_handle_struct *handle, struct files_struct *fsp, SMB_STRUCT_AIOCB *aiocb);
 327                 int (*aio_write)(struct vfs_handle_struct *handle, struct files_struct *fsp, SMB_STRUCT_AIOCB *aiocb);
 328                 ssize_t (*aio_return_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, SMB_STRUCT_AIOCB *aiocb);
 329                 int (*aio_cancel)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, SMB_STRUCT_AIOCB *aiocb);
 330                 int (*aio_error_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, SMB_STRUCT_AIOCB *aiocb);
 331                 int (*aio_fsync)(struct vfs_handle_struct *handle, struct files_struct *fsp, int op, SMB_STRUCT_AIOCB *aiocb);
 332                 int (*aio_suspend)(struct vfs_handle_struct *handle, struct files_struct *fsp, const SMB_STRUCT_AIOCB * const aiocb[], int n, const struct timespec *timeout);
 333
 334         } ops;
 335
 336         struct vfs_handles_pointers {
 337                 /* Disk operations */
 338
 339                 struct vfs_handle_struct *connect_hnd;
 340                 struct vfs_handle_struct *disconnect;
 341                 struct vfs_handle_struct *disk_free;
 342                 struct vfs_handle_struct *get_quota;
 343                 struct vfs_handle_struct *set_quota;
 344                 struct vfs_handle_struct *get_shadow_copy_data;
 345                 struct vfs_handle_struct *statvfs;
 346
 347                 /* Directory operations */
 348
 349                 struct vfs_handle_struct *opendir;
 350                 struct vfs_handle_struct *readdir;
 351                 struct vfs_handle_struct *seekdir;
 352                 struct vfs_handle_struct *telldir;
 353                 struct vfs_handle_struct *rewind_dir;
 354                 struct vfs_handle_struct *mkdir;
 355                 struct vfs_handle_struct *rmdir;
 356                 struct vfs_handle_struct *closedir;
 357
 358                 /* File operations */
 359
 360                 struct vfs_handle_struct *open;
 361                 struct vfs_handle_struct *close_hnd;
 362                 struct vfs_handle_struct *read;
 363                 struct vfs_handle_struct *pread;
 364                 struct vfs_handle_struct *write;
 365                 struct vfs_handle_struct *pwrite;
 366                 struct vfs_handle_struct *lseek;
 367                 struct vfs_handle_struct *sendfile;
 368                 struct vfs_handle_struct *rename;
 369                 struct vfs_handle_struct *fsync;
 370                 struct vfs_handle_struct *stat;
 371                 struct vfs_handle_struct *fstat;
 372                 struct vfs_handle_struct *lstat;
 373                 struct vfs_handle_struct *unlink;
 374                 struct vfs_handle_struct *chmod;
 375                 struct vfs_handle_struct *fchmod;
 376                 struct vfs_handle_struct *chown;
 377                 struct vfs_handle_struct *fchown;
 378                 struct vfs_handle_struct *chdir;
 379                 struct vfs_handle_struct *getwd;
 380                 struct vfs_handle_struct *utime;
 381                 struct vfs_handle_struct *ftruncate;
 382                 struct vfs_handle_struct *lock;
 383                 struct vfs_handle_struct *getlock;
 384                 struct vfs_handle_struct *symlink;
 385                 struct vfs_handle_struct *readlink;
 386                 struct vfs_handle_struct *link;
 387                 struct vfs_handle_struct *mknod;
 388                 struct vfs_handle_struct *realpath;
 389
 390                 /* NT ACL operations. */
 391
 392                 struct vfs_handle_struct *fget_nt_acl;
 393                 struct vfs_handle_struct *get_nt_acl;
 394                 struct vfs_handle_struct *fset_nt_acl;
 395                 struct vfs_handle_struct *set_nt_acl;
 396
 397                 /* POSIX ACL operations. */
 398
 399                 struct vfs_handle_struct *chmod_acl;
 400                 struct vfs_handle_struct *fchmod_acl;
 401
 402                 struct vfs_handle_struct *sys_acl_get_entry;
 403                 struct vfs_handle_struct *sys_acl_get_tag_type;
 404                 struct vfs_handle_struct *sys_acl_get_permset;
 405                 struct vfs_handle_struct *sys_acl_get_qualifier;
 406                 struct vfs_handle_struct *sys_acl_get_file;
 407                 struct vfs_handle_struct *sys_acl_get_fd;
 408                 struct vfs_handle_struct *sys_acl_clear_perms;
 409                 struct vfs_handle_struct *sys_acl_add_perm;
 410                 struct vfs_handle_struct *sys_acl_to_text;
 411                 struct vfs_handle_struct *sys_acl_init;
 412                 struct vfs_handle_struct *sys_acl_create_entry;
 413                 struct vfs_handle_struct *sys_acl_set_tag_type;
 414                 struct vfs_handle_struct *sys_acl_set_qualifier;
 415                 struct vfs_handle_struct *sys_acl_set_permset;
 416                 struct vfs_handle_struct *sys_acl_valid;
 417                 struct vfs_handle_struct *sys_acl_set_file;
 418                 struct vfs_handle_struct *sys_acl_set_fd;
 419                 struct vfs_handle_struct *sys_acl_delete_def_file;
 420                 struct vfs_handle_struct *sys_acl_get_perm;
 421                 struct vfs_handle_struct *sys_acl_free_text;
 422                 struct vfs_handle_struct *sys_acl_free_acl;
 423                 struct vfs_handle_struct *sys_acl_free_qualifier;
 424
 425                 /* EA operations. */
 426                 struct vfs_handle_struct *getxattr;
 427                 struct vfs_handle_struct *lgetxattr;
 428                 struct vfs_handle_struct *fgetxattr;
 429                 struct vfs_handle_struct *listxattr;
 430                 struct vfs_handle_struct *llistxattr;
 431                 struct vfs_handle_struct *flistxattr;
 432                 struct vfs_handle_struct *removexattr;
 433                 struct vfs_handle_struct *lremovexattr;
 434                 struct vfs_handle_struct *fremovexattr;
 435                 struct vfs_handle_struct *setxattr;
 436                 struct vfs_handle_struct *lsetxattr;
 437                 struct vfs_handle_struct *fsetxattr;
 438
 439                 /* aio operations */
 440                 struct vfs_handle_struct *aio_read;
 441                 struct vfs_handle_struct *aio_write;
 442                 struct vfs_handle_struct *aio_return;
 443                 struct vfs_handle_struct *aio_cancel;
 444                 struct vfs_handle_struct *aio_error;
 445                 struct vfs_handle_struct *aio_fsync;
 446                 struct vfs_handle_struct *aio_suspend;
 447         } handles;
 448 };
 449
 450 /*
 451     Possible VFS operation layers (per-operation)
 452
 453     These values are used by VFS subsystem when building vfs_ops for connection
 454     from multiple VFS modules. Internally, Samba differentiates only opaque and
 455     transparent layers at this process. Other types are used for providing better
 456     diagnosing facilities.
 457
 458     Most modules will provide transparent layers. Opaque layer is for modules
 459     which implement actual file system calls (like DB-based VFS). For example,
 460     default POSIX VFS which is built in into Samba is an opaque VFS module.
 461
 462     Other layer types (audit, splitter, scanner) were designed to provide different
 463     degree of transparency and for diagnosing VFS module behaviour.
 464
 465     Each module can implement several layers at the same time provided that only
 466     one layer is used per each operation.
 467
 468 */
 469
 470 typedef enum _vfs_op_layer {
 471         SMB_VFS_LAYER_NOOP = -1,        /* - For using in VFS module to indicate end of array */
 472                                         /*   of operations description */
 473         SMB_VFS_LAYER_OPAQUE = 0,       /* - Final level, does not call anything beyond itself */
 474         SMB_VFS_LAYER_TRANSPARENT,      /* - Normal operation, calls underlying layer after */
 475                                         /*   possibly changing passed data */
 476         SMB_VFS_LAYER_LOGGER,           /* - Logs data, calls underlying layer, logging may not */
 477                                         /*   use Samba VFS */
 478         SMB_VFS_LAYER_SPLITTER,         /* - Splits operation, calls underlying layer _and_ own facility, */
 479                                         /*   then combines result */
 480         SMB_VFS_LAYER_SCANNER           /* - Checks data and possibly initiates additional */
 481                                         /*   file activity like logging to files _inside_ samba VFS */
 482 } vfs_op_layer;
 483
 484 /*
 485     VFS operation description. Each VFS module registers an array of vfs_op_tuple to VFS subsystem,
 486     which describes all operations this module is willing to intercept.
 487     VFS subsystem initializes then the conn->vfs_ops and conn->vfs_opaque_ops structs
 488     using this information.
 489 */
 490
 491 typedef struct vfs_op_tuple {
 492         void* op;
 493         vfs_op_type type;
 494         vfs_op_layer layer;
 495 } vfs_op_tuple;
 496
 497
 498 typedef struct vfs_handle_struct {
 499         struct vfs_handle_struct  *next, *prev;
 500         const char *param;
 501         struct vfs_ops vfs_next;
 502         struct connection_struct *conn;
 503         void *data;
 504         void (*free_data)(void **data);
 505 } vfs_handle_struct;
 506
 507
 508 typedef struct vfs_statvfs_struct {
 509         /* For undefined recommended transfer size return -1 in that field */
 510         uint32 OptimalTransferSize;  /* bsize on some os, iosize on other os */
 511         uint32 BlockSize;
 512
 513         /*
 514          The next three fields are in terms of the block size.
 515          (above). If block size is unknown, 4096 would be a
 516          reasonable block size for a server to report.
 517          Note that returning the blocks/blocksavail removes need
 518          to make a second call (to QFSInfo level 0x103 to get this info.
 519          UserBlockAvail is typically less than or equal to BlocksAvail,
 520          if no distinction is made return the same value in each.
 521         */
 522
 523         SMB_BIG_UINT TotalBlocks;
 524         SMB_BIG_UINT BlocksAvail;       /* bfree */
 525         SMB_BIG_UINT UserBlocksAvail;   /* bavail */
 526
 527         /* For undefined Node fields or FSID return -1 */
 528         SMB_BIG_UINT TotalFileNodes;
 529         SMB_BIG_UINT FreeFileNodes;
 530         SMB_BIG_UINT FsIdentifier;   /* fsid */
 531         /* NB Namelen comes from FILE_SYSTEM_ATTRIBUTE_INFO call */
 532         /* NB flags can come from FILE_SYSTEM_DEVICE_INFO call   */
 533 } vfs_statvfs_struct;
 534
 535 #define VFS_ADD_FSP_EXTENSION(handle, fsp, type) \
 536     vfs_add_fsp_extension_notype(handle, (fsp), sizeof(type))
 537
 538 #define VFS_FETCH_FSP_EXTENSION(handle, fsp) \
 539     vfs_fetch_fsp_extension(handle, (fsp))
 540
 541 #define VFS_REMOVE_FSP_EXTENSION(handle, fsp) \
 542     vfs_remove_fsp_extension((handle), (fsp))
 543
 544 #define SMB_VFS_HANDLE_GET_DATA(handle, datap, type, ret) { \
 545         if (!(handle)||((datap=(type *)(handle)->data)==NULL)) { \
 546                 DEBUG(0,("%s() failed to get vfs_handle->data!\n",FUNCTION_MACRO)); \
 547                 ret; \
 548         } \
 549 }
 550
 551 #define SMB_VFS_HANDLE_SET_DATA(handle, datap, free_fn, type, ret) { \
 552         if (!(handle)) { \
 553                 DEBUG(0,("%s() failed to set handle->data!\n",FUNCTION_MACRO)); \
 554                 ret; \
 555         } else { \
 556                 if ((handle)->free_data) { \
 557                         (handle)->free_data(&(handle)->data); \
 558                 } \
 559                 (handle)->data = (void *)datap; \
 560                 (handle)->free_data = free_fn; \
 561         } \
 562 }
 563
 564 #define SMB_VFS_HANDLE_FREE_DATA(handle) { \
 565         if ((handle) && (handle)->free_data) { \
 566                 (handle)->free_data(&(handle)->data); \
 567         } \
 568 }
 569
 570 /* Check whether module-specific data handle was already allocated or not */
 571 #define SMB_VFS_HANDLE_TEST_DATA(handle)  ( !(handle) || !(handle)->data ? False : True )
 572
 573 #define SMB_VFS_OP(x) ((void *) x)
 574
 575 #define DEFAULT_VFS_MODULE_NAME "/[Default VFS]/"
 576
 577 #include "vfs_macros.h"
 578
 579 #endif /* _VFS_H */