source3/include/vfs.h

   1 /*
   2    Unix SMB/CIFS implementation.
   3    VFS structures and parameters
   4    Copyright (C) Jeremy Allison                         1999-2003
   5    Copyright (C) Tim Potter                             1999
   6    Copyright (C) Alexander Bokovoy                      2002
   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
  46 /* Changed to version 2 for CIFS UNIX extensions (mknod and link added). JRA. */
  47 /* Changed to version 3 for POSIX acl extensions. JRA. */
  48 /* Changed to version 4 for cascaded VFS interface. Alexander Bokovoy. */
  49 /* Changed to version 5 for sendfile addition. JRA. */
  50 /* Changed to version 6 for the new module system, fixed cascading and quota functions. --metze */
  51 /* Changed to version 7 to include the get_nt_acl info parameter. JRA. */
  52 /* Changed to version 8 includes EA calls. JRA. */
  53 /* Changed to version 9 to include the get_shadow_data call. --metze */
  54 #define SMB_VFS_INTERFACE_VERSION 9
  55
  56
  57 /* to bug old modules witch are trying to compile with the old functions */
  58 #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 };
  59 #define lp_parm_string __ERROR_please_port_lp_parm_string_to_lp_parm_const_string_or_lp_parm_talloc_string { \
  60   __ERROR_please_port_lp_parm_string_to_lp_parm_const_string_or_lp_parm_talloc_string };
  61 #define lp_vfs_options __ERROR_please_donot_use_lp_vfs_options_anymore_use_lp_parm_xxxx_functions_instead { \
  62   __ERROR_please_donot_use_lp_vfs_options_anymore_use_lp_parm_xxxx_functions_instead };
  63
  64 /*
  65     All intercepted VFS operations must be declared as static functions inside module source
  66     in order to keep smbd namespace unpolluted. See source of audit, extd_audit, fake_perms and recycle
  67     example VFS modules for more details.
  68 */
  69
  70 /* VFS operations structure */
  71
  72 struct vfs_handle_struct;
  73 struct connection_struct;
  74 struct files_struct;
  75 struct security_descriptor_info;
  76
  77 /*
  78     Available VFS operations. These values must be in sync with vfs_ops struct
  79     (struct vfs_fn_pointers and struct vfs_handle_pointers inside of struct vfs_ops).
  80     In particular, if new operations are added to vfs_ops, appropriate constants
  81     should be added to vfs_op_type so that order of them kept same as in vfs_ops.
  82 */
  83
  84 typedef enum _vfs_op_type {
  85         SMB_VFS_OP_NOOP = -1,
  86
  87         /* Disk operations */
  88
  89         SMB_VFS_OP_CONNECT = 0,
  90         SMB_VFS_OP_DISCONNECT,
  91         SMB_VFS_OP_DISK_FREE,
  92         SMB_VFS_OP_GET_QUOTA,
  93         SMB_VFS_OP_SET_QUOTA,
  94         SMB_VFS_OP_GET_SHADOW_COPY_DATA,
  95
  96
  97         /* Directory operations */
  98
  99         SMB_VFS_OP_OPENDIR,
 100         SMB_VFS_OP_READDIR,
 101         SMB_VFS_OP_MKDIR,
 102         SMB_VFS_OP_RMDIR,
 103         SMB_VFS_OP_CLOSEDIR,
 104
 105         /* File operations */
 106
 107         SMB_VFS_OP_OPEN,
 108         SMB_VFS_OP_CLOSE,
 109         SMB_VFS_OP_READ,
 110         SMB_VFS_OP_WRITE,
 111         SMB_VFS_OP_LSEEK,
 112         SMB_VFS_OP_SENDFILE,
 113         SMB_VFS_OP_RENAME,
 114         SMB_VFS_OP_FSYNC,
 115         SMB_VFS_OP_STAT,
 116         SMB_VFS_OP_FSTAT,
 117         SMB_VFS_OP_LSTAT,
 118         SMB_VFS_OP_UNLINK,
 119         SMB_VFS_OP_CHMOD,
 120         SMB_VFS_OP_FCHMOD,
 121         SMB_VFS_OP_CHOWN,
 122         SMB_VFS_OP_FCHOWN,
 123         SMB_VFS_OP_CHDIR,
 124         SMB_VFS_OP_GETWD,
 125         SMB_VFS_OP_UTIME,
 126         SMB_VFS_OP_FTRUNCATE,
 127         SMB_VFS_OP_LOCK,
 128         SMB_VFS_OP_SYMLINK,
 129         SMB_VFS_OP_READLINK,
 130         SMB_VFS_OP_LINK,
 131         SMB_VFS_OP_MKNOD,
 132         SMB_VFS_OP_REALPATH,
 133
 134         /* NT ACL operations. */
 135
 136         SMB_VFS_OP_FGET_NT_ACL,
 137         SMB_VFS_OP_GET_NT_ACL,
 138         SMB_VFS_OP_FSET_NT_ACL,
 139         SMB_VFS_OP_SET_NT_ACL,
 140
 141         /* POSIX ACL operations. */
 142
 143         SMB_VFS_OP_CHMOD_ACL,
 144         SMB_VFS_OP_FCHMOD_ACL,
 145
 146         SMB_VFS_OP_SYS_ACL_GET_ENTRY,
 147         SMB_VFS_OP_SYS_ACL_GET_TAG_TYPE,
 148         SMB_VFS_OP_SYS_ACL_GET_PERMSET,
 149         SMB_VFS_OP_SYS_ACL_GET_QUALIFIER,
 150         SMB_VFS_OP_SYS_ACL_GET_FILE,
 151         SMB_VFS_OP_SYS_ACL_GET_FD,
 152         SMB_VFS_OP_SYS_ACL_CLEAR_PERMS,
 153         SMB_VFS_OP_SYS_ACL_ADD_PERM,
 154         SMB_VFS_OP_SYS_ACL_TO_TEXT,
 155         SMB_VFS_OP_SYS_ACL_INIT,
 156         SMB_VFS_OP_SYS_ACL_CREATE_ENTRY,
 157         SMB_VFS_OP_SYS_ACL_SET_TAG_TYPE,
 158         SMB_VFS_OP_SYS_ACL_SET_QUALIFIER,
 159         SMB_VFS_OP_SYS_ACL_SET_PERMSET,
 160         SMB_VFS_OP_SYS_ACL_VALID,
 161         SMB_VFS_OP_SYS_ACL_SET_FILE,
 162         SMB_VFS_OP_SYS_ACL_SET_FD,
 163         SMB_VFS_OP_SYS_ACL_DELETE_DEF_FILE,
 164         SMB_VFS_OP_SYS_ACL_GET_PERM,
 165         SMB_VFS_OP_SYS_ACL_FREE_TEXT,
 166         SMB_VFS_OP_SYS_ACL_FREE_ACL,
 167         SMB_VFS_OP_SYS_ACL_FREE_QUALIFIER,
 168
 169         /* EA operations. */
 170         SMB_VFS_OP_GETXATTR,
 171         SMB_VFS_OP_LGETXATTR,
 172         SMB_VFS_OP_FGETXATTR,
 173         SMB_VFS_OP_LISTXATTR,
 174         SMB_VFS_OP_LLISTXATTR,
 175         SMB_VFS_OP_FLISTXATTR,
 176         SMB_VFS_OP_REMOVEXATTR,
 177         SMB_VFS_OP_LREMOVEXATTR,
 178         SMB_VFS_OP_FREMOVEXATTR,
 179         SMB_VFS_OP_SETXATTR,
 180         SMB_VFS_OP_LSETXATTR,
 181         SMB_VFS_OP_FSETXATTR,
 182
 183         /* This should always be last enum value */
 184
 185         SMB_VFS_OP_LAST
 186 } vfs_op_type;
 187
 188 /*
 189     Please keep vfs_op_type, struct vfs_fn_pointers and struct vfs_handles_pointers in sync.
 190 */
 191 struct vfs_ops {
 192         struct vfs_fn_pointers {
 193                 /* Disk operations */
 194
 195                 int (*connect)(struct vfs_handle_struct *handle, struct connection_struct *conn, const char *service, const char *user);
 196                 void (*disconnect)(struct vfs_handle_struct *handle, struct connection_struct *conn);
 197                 SMB_BIG_UINT (*disk_free)(struct vfs_handle_struct *handle, struct connection_struct *conn, const char *path, BOOL small_query, SMB_BIG_UINT *bsize,
 198                         SMB_BIG_UINT *dfree, SMB_BIG_UINT *dsize);
 199                 int (*get_quota)(struct vfs_handle_struct *handle, struct connection_struct *conn, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *qt);
 200                 int (*set_quota)(struct vfs_handle_struct *handle, struct connection_struct *conn, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *qt);
 201                 int (*get_shadow_copy_data)(struct vfs_handle_struct *handle, struct files_struct *fsp, SHADOW_COPY_DATA *shadow_copy_data, BOOL labels);
 202
 203                 /* Directory operations */
 204
 205                 DIR *(*opendir)(struct vfs_handle_struct *handle, struct connection_struct *conn, const char *fname);
 206                 struct dirent *(*readdir)(struct vfs_handle_struct *handle, struct connection_struct *conn, DIR *dirp);
 207                 int (*mkdir)(struct vfs_handle_struct *handle, struct connection_struct *conn, const char *path, mode_t mode);
 208                 int (*rmdir)(struct vfs_handle_struct *handle, struct connection_struct *conn, const char *path);
 209                 int (*closedir)(struct vfs_handle_struct *handle, struct connection_struct *conn, DIR *dir);
 210
 211                 /* File operations */
 212
 213                 int (*open)(struct vfs_handle_struct *handle, struct connection_struct *conn, const char *fname, int flags, mode_t mode);
 214                 int (*close)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd);
 215                 ssize_t (*read)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, void *data, size_t n);
 216                 ssize_t (*write)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, const void *data, size_t n);
 217                 SMB_OFF_T (*lseek)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, SMB_OFF_T offset, int whence);
 218                 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);
 219                 int (*rename)(struct vfs_handle_struct *handle, struct connection_struct *conn, const char *old, const char *new);
 220                 int (*fsync)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd);
 221                 int (*stat)(struct vfs_handle_struct *handle, struct connection_struct *conn, const char *fname, SMB_STRUCT_STAT *sbuf);
 222                 int (*fstat)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, SMB_STRUCT_STAT *sbuf);
 223                 int (*lstat)(struct vfs_handle_struct *handle, struct connection_struct *conn, const char *path, SMB_STRUCT_STAT *sbuf);
 224                 int (*unlink)(struct vfs_handle_struct *handle, struct connection_struct *conn, const char *path);
 225                 int (*chmod)(struct vfs_handle_struct *handle, struct connection_struct *conn, const char *path, mode_t mode);
 226                 int (*fchmod)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, mode_t mode);
 227                 int (*chown)(struct vfs_handle_struct *handle, struct connection_struct *conn, const char *path, uid_t uid, gid_t gid);
 228                 int (*fchown)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, uid_t uid, gid_t gid);
 229                 int (*chdir)(struct vfs_handle_struct *handle, struct connection_struct *conn, const char *path);
 230                 char *(*getwd)(struct vfs_handle_struct *handle, struct connection_struct *conn, char *buf);
 231                 int (*utime)(struct vfs_handle_struct *handle, struct connection_struct *conn, const char *path, struct utimbuf *times);
 232                 int (*ftruncate)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, SMB_OFF_T offset);
 233                 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);
 234                 int (*symlink)(struct vfs_handle_struct *handle, struct connection_struct *conn, const char *oldpath, const char *newpath);
 235                 int (*readlink)(struct vfs_handle_struct *handle, struct connection_struct *conn, const char *path, char *buf, size_t bufsiz);
 236                 int (*link)(struct vfs_handle_struct *handle, struct connection_struct *conn, const char *oldpath, const char *newpath);
 237                 int (*mknod)(struct vfs_handle_struct *handle, struct connection_struct *conn, const char *path, mode_t mode, SMB_DEV_T dev);
 238                 char *(*realpath)(struct vfs_handle_struct *handle, struct connection_struct *conn, const char *path, char *resolved_path);
 239
 240                 /* NT ACL operations. */
 241
 242                 size_t (*fget_nt_acl)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd,  uint32 security_info, struct security_descriptor_info **ppdesc);
 243                 size_t (*get_nt_acl)(struct vfs_handle_struct *handle, struct files_struct *fsp, const char *name,  uint32 security_info, struct security_descriptor_info **ppdesc);
 244                 BOOL (*fset_nt_acl)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, uint32 security_info_sent, struct security_descriptor_info *psd);
 245                 BOOL (*set_nt_acl)(struct vfs_handle_struct *handle, struct files_struct *fsp, const char *name, uint32 security_info_sent, struct security_descriptor_info *psd);
 246
 247                 /* POSIX ACL operations. */
 248
 249                 int (*chmod_acl)(struct vfs_handle_struct *handle, struct connection_struct *conn, const char *name, mode_t mode);
 250                 int (*fchmod_acl)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, mode_t mode);
 251
 252                 int (*sys_acl_get_entry)(struct vfs_handle_struct *handle, struct connection_struct *conn, SMB_ACL_T theacl, int entry_id, SMB_ACL_ENTRY_T *entry_p);
 253                 int (*sys_acl_get_tag_type)(struct vfs_handle_struct *handle, struct connection_struct *conn, SMB_ACL_ENTRY_T entry_d, SMB_ACL_TAG_T *tag_type_p);
 254                 int (*sys_acl_get_permset)(struct vfs_handle_struct *handle, struct connection_struct *conn, SMB_ACL_ENTRY_T entry_d, SMB_ACL_PERMSET_T *permset_p);
 255                 void * (*sys_acl_get_qualifier)(struct vfs_handle_struct *handle, struct connection_struct *conn, SMB_ACL_ENTRY_T entry_d);
 256                 SMB_ACL_T (*sys_acl_get_file)(struct vfs_handle_struct *handle, struct connection_struct *conn, const char *path_p, SMB_ACL_TYPE_T type);
 257                 SMB_ACL_T (*sys_acl_get_fd)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd);
 258                 int (*sys_acl_clear_perms)(struct vfs_handle_struct *handle, struct connection_struct *conn, SMB_ACL_PERMSET_T permset);
 259                 int (*sys_acl_add_perm)(struct vfs_handle_struct *handle, struct connection_struct *conn, SMB_ACL_PERMSET_T permset, SMB_ACL_PERM_T perm);
 260                 char * (*sys_acl_to_text)(struct vfs_handle_struct *handle, struct connection_struct *conn, SMB_ACL_T theacl, ssize_t *plen);
 261                 SMB_ACL_T (*sys_acl_init)(struct vfs_handle_struct *handle, struct connection_struct *conn, int count);
 262                 int (*sys_acl_create_entry)(struct vfs_handle_struct *handle, struct connection_struct *conn, SMB_ACL_T *pacl, SMB_ACL_ENTRY_T *pentry);
 263                 int (*sys_acl_set_tag_type)(struct vfs_handle_struct *handle, struct connection_struct *conn, SMB_ACL_ENTRY_T entry, SMB_ACL_TAG_T tagtype);
 264                 int (*sys_acl_set_qualifier)(struct vfs_handle_struct *handle, struct connection_struct *conn, SMB_ACL_ENTRY_T entry, void *qual);
 265                 int (*sys_acl_set_permset)(struct vfs_handle_struct *handle, struct connection_struct *conn, SMB_ACL_ENTRY_T entry, SMB_ACL_PERMSET_T permset);
 266                 int (*sys_acl_valid)(struct vfs_handle_struct *handle, struct connection_struct *conn, SMB_ACL_T theacl );
 267                 int (*sys_acl_set_file)(struct vfs_handle_struct *handle, struct connection_struct *conn, const char *name, SMB_ACL_TYPE_T acltype, SMB_ACL_T theacl);
 268                 int (*sys_acl_set_fd)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, SMB_ACL_T theacl);
 269                 int (*sys_acl_delete_def_file)(struct vfs_handle_struct *handle, struct connection_struct *conn, const char *path);
 270                 int (*sys_acl_get_perm)(struct vfs_handle_struct *handle, struct connection_struct *conn, SMB_ACL_PERMSET_T permset, SMB_ACL_PERM_T perm);
 271                 int (*sys_acl_free_text)(struct vfs_handle_struct *handle, struct connection_struct *conn, char *text);
 272                 int (*sys_acl_free_acl)(struct vfs_handle_struct *handle, struct connection_struct *conn, SMB_ACL_T posix_acl);
 273                 int (*sys_acl_free_qualifier)(struct vfs_handle_struct *handle, struct connection_struct *conn, void *qualifier, SMB_ACL_TAG_T tagtype);
 274
 275                 /* EA operations. */
 276                 ssize_t (*getxattr)(struct vfs_handle_struct *handle,struct connection_struct *conn,const char *path, const char *name, void *value, size_t size);
 277                 ssize_t (*lgetxattr)(struct vfs_handle_struct *handle,struct connection_struct *conn,const char *path, const char *name, void *value, size_t size);
 278                 ssize_t (*fgetxattr)(struct vfs_handle_struct *handle, struct files_struct *fsp,int fd, const char *name, void *value, size_t size);
 279                 ssize_t (*listxattr)(struct vfs_handle_struct *handle, struct connection_struct *conn,const char *path, char *list, size_t size);
 280                 ssize_t (*llistxattr)(struct vfs_handle_struct *handle, struct connection_struct *conn,const char *path, char *list, size_t size);
 281                 ssize_t (*flistxattr)(struct vfs_handle_struct *handle, struct files_struct *fsp,int fd, char *list, size_t size);
 282                 int (*removexattr)(struct vfs_handle_struct *handle, struct connection_struct *conn,const char *path, const char *name);
 283                 int (*lremovexattr)(struct vfs_handle_struct *handle, struct connection_struct *conn,const char *path, const char *name);
 284                 int (*fremovexattr)(struct vfs_handle_struct *handle, struct files_struct *fsp,int filedes, const char *name);
 285                 int (*setxattr)(struct vfs_handle_struct *handle, struct connection_struct *conn,const char *path, const char *name, const void *value, size_t size, int flags);
 286                 int (*lsetxattr)(struct vfs_handle_struct *handle, struct connection_struct *conn,const char *path, const char *name, const void *value, size_t size, int flags);
 287                 int (*fsetxattr)(struct vfs_handle_struct *handle, struct files_struct *fsp,int filedes, const char *name, const void *value, size_t size, int flags);
 288
 289         } ops;
 290
 291         struct vfs_handles_pointers {
 292                 /* Disk operations */
 293
 294                 struct vfs_handle_struct *connect;
 295                 struct vfs_handle_struct *disconnect;
 296                 struct vfs_handle_struct *disk_free;
 297                 struct vfs_handle_struct *get_quota;
 298                 struct vfs_handle_struct *set_quota;
 299                 struct vfs_handle_struct *get_shadow_copy_data;
 300
 301                 /* Directory operations */
 302
 303                 struct vfs_handle_struct *opendir;
 304                 struct vfs_handle_struct *readdir;
 305                 struct vfs_handle_struct *mkdir;
 306                 struct vfs_handle_struct *rmdir;
 307                 struct vfs_handle_struct *closedir;
 308
 309                 /* File operations */
 310
 311                 struct vfs_handle_struct *open;
 312                 struct vfs_handle_struct *close;
 313                 struct vfs_handle_struct *read;
 314                 struct vfs_handle_struct *write;
 315                 struct vfs_handle_struct *lseek;
 316                 struct vfs_handle_struct *sendfile;
 317                 struct vfs_handle_struct *rename;
 318                 struct vfs_handle_struct *fsync;
 319                 struct vfs_handle_struct *stat;
 320                 struct vfs_handle_struct *fstat;
 321                 struct vfs_handle_struct *lstat;
 322                 struct vfs_handle_struct *unlink;
 323                 struct vfs_handle_struct *chmod;
 324                 struct vfs_handle_struct *fchmod;
 325                 struct vfs_handle_struct *chown;
 326                 struct vfs_handle_struct *fchown;
 327                 struct vfs_handle_struct *chdir;
 328                 struct vfs_handle_struct *getwd;
 329                 struct vfs_handle_struct *utime;
 330                 struct vfs_handle_struct *ftruncate;
 331                 struct vfs_handle_struct *lock;
 332                 struct vfs_handle_struct *symlink;
 333                 struct vfs_handle_struct *readlink;
 334                 struct vfs_handle_struct *link;
 335                 struct vfs_handle_struct *mknod;
 336                 struct vfs_handle_struct *realpath;
 337
 338                 /* NT ACL operations. */
 339
 340                 struct vfs_handle_struct *fget_nt_acl;
 341                 struct vfs_handle_struct *get_nt_acl;
 342                 struct vfs_handle_struct *fset_nt_acl;
 343                 struct vfs_handle_struct *set_nt_acl;
 344
 345                 /* POSIX ACL operations. */
 346
 347                 struct vfs_handle_struct *chmod_acl;
 348                 struct vfs_handle_struct *fchmod_acl;
 349
 350                 struct vfs_handle_struct *sys_acl_get_entry;
 351                 struct vfs_handle_struct *sys_acl_get_tag_type;
 352                 struct vfs_handle_struct *sys_acl_get_permset;
 353                 struct vfs_handle_struct *sys_acl_get_qualifier;
 354                 struct vfs_handle_struct *sys_acl_get_file;
 355                 struct vfs_handle_struct *sys_acl_get_fd;
 356                 struct vfs_handle_struct *sys_acl_clear_perms;
 357                 struct vfs_handle_struct *sys_acl_add_perm;
 358                 struct vfs_handle_struct *sys_acl_to_text;
 359                 struct vfs_handle_struct *sys_acl_init;
 360                 struct vfs_handle_struct *sys_acl_create_entry;
 361                 struct vfs_handle_struct *sys_acl_set_tag_type;
 362                 struct vfs_handle_struct *sys_acl_set_qualifier;
 363                 struct vfs_handle_struct *sys_acl_set_permset;
 364                 struct vfs_handle_struct *sys_acl_valid;
 365                 struct vfs_handle_struct *sys_acl_set_file;
 366                 struct vfs_handle_struct *sys_acl_set_fd;
 367                 struct vfs_handle_struct *sys_acl_delete_def_file;
 368                 struct vfs_handle_struct *sys_acl_get_perm;
 369                 struct vfs_handle_struct *sys_acl_free_text;
 370                 struct vfs_handle_struct *sys_acl_free_acl;
 371                 struct vfs_handle_struct *sys_acl_free_qualifier;
 372
 373                 /* EA operations. */
 374                 struct vfs_handle_struct *getxattr;
 375                 struct vfs_handle_struct *lgetxattr;
 376                 struct vfs_handle_struct *fgetxattr;
 377                 struct vfs_handle_struct *listxattr;
 378                 struct vfs_handle_struct *llistxattr;
 379                 struct vfs_handle_struct *flistxattr;
 380                 struct vfs_handle_struct *removexattr;
 381                 struct vfs_handle_struct *lremovexattr;
 382                 struct vfs_handle_struct *fremovexattr;
 383                 struct vfs_handle_struct *setxattr;
 384                 struct vfs_handle_struct *lsetxattr;
 385                 struct vfs_handle_struct *fsetxattr;
 386
 387         } handles;
 388 };
 389
 390 /*
 391     Possible VFS operation layers (per-operation)
 392
 393     These values are used by VFS subsystem when building vfs_ops for connection
 394     from multiple VFS modules. Internally, Samba differentiates only opaque and
 395     transparent layers at this process. Other types are used for providing better
 396     diagnosing facilities.
 397
 398     Most modules will provide transparent layers. Opaque layer is for modules
 399     which implement actual file system calls (like DB-based VFS). For example,
 400     default POSIX VFS which is built in into Samba is an opaque VFS module.
 401
 402     Other layer types (audit, splitter, scanner) were designed to provide different
 403     degree of transparency and for diagnosing VFS module behaviour.
 404
 405     Each module can implement several layers at the same time provided that only
 406     one layer is used per each operation.
 407
 408 */
 409
 410 typedef enum _vfs_op_layer {
 411         SMB_VFS_LAYER_NOOP = -1,        /* - For using in VFS module to indicate end of array */
 412                                         /*   of operations description */
 413         SMB_VFS_LAYER_OPAQUE = 0,       /* - Final level, does not call anything beyond itself */
 414         SMB_VFS_LAYER_TRANSPARENT,      /* - Normal operation, calls underlying layer after */
 415                                         /*   possibly changing passed data */
 416         SMB_VFS_LAYER_LOGGER,           /* - Logs data, calls underlying layer, logging may not */
 417                                         /*   use Samba VFS */
 418         SMB_VFS_LAYER_SPLITTER,         /* - Splits operation, calls underlying layer _and_ own facility, */
 419                                         /*   then combines result */
 420         SMB_VFS_LAYER_SCANNER           /* - Checks data and possibly initiates additional */
 421                                         /*   file activity like logging to files _inside_ samba VFS */
 422 } vfs_op_layer;
 423
 424 /*
 425     VFS operation description. Each VFS module registers an array of vfs_op_tuple to VFS subsystem,
 426     which describes all operations this module is willing to intercept.
 427     VFS subsystem initializes then the conn->vfs_ops and conn->vfs_opaque_ops structs
 428     using this information.
 429 */
 430
 431 typedef struct _vfs_op_tuple {
 432         void* op;
 433         vfs_op_type type;
 434         vfs_op_layer layer;
 435 } vfs_op_tuple;
 436
 437
 438 typedef struct vfs_handle_struct {
 439         struct vfs_handle_struct  *next, *prev;
 440         const char *param;
 441         struct vfs_ops vfs_next;
 442         struct connection_struct *conn;
 443         void *data;
 444         void (*free_data)(void **data);
 445 } vfs_handle_struct;
 446
 447
 448 #define SMB_VFS_HANDLE_GET_DATA(handle, datap, type, ret) { \
 449         if (!(handle)||((datap=(type *)(handle)->data)==NULL)) { \
 450                 DEBUG(0,("%s() failed to get vfs_handle->data!\n",FUNCTION_MACRO)); \
 451                 ret; \
 452         } \
 453 }
 454
 455 #define SMB_VFS_HANDLE_SET_DATA(handle, datap, free_fn, type, ret) { \
 456         if (!(handle)) { \
 457                 DEBUG(0,("%s() failed to set handle->data!\n",FUNCTION_MACRO)); \
 458                 ret; \
 459         } else { \
 460                 if ((handle)->free_data) { \
 461                         (handle)->free_data(&(handle)->data); \
 462                 } \
 463                 (handle)->data = (void *)datap; \
 464                 (handle)->free_data = free_fn; \
 465         } \
 466 }
 467
 468 #define SMB_VFS_HANDLE_FREE_DATA(handle) { \
 469         if ((handle) && (handle)->free_data) { \
 470                 (handle)->free_data(&(handle)->data); \
 471         } \
 472 }
 473
 474 /* Check whether module-specific data handle was already allocated or not */
 475 #define SMB_VFS_HANDLE_TEST_DATA(handle)  ( !(handle) || !(handle)->data ? False : True )
 476
 477 #define SMB_VFS_OP(x) ((void *) x)
 478
 479
 480 #include "vfs_macros.h"
 481
 482 #endif /* _VFS_H */