source/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    Also include kernel_flock call - jmcd */
  68 /* Changed to version 19, kernel change notify has been merged
  69    Also included linux setlease call - jmcd */
  70 /* Changed to version 20, use ntimes call instead of utime (greater
  71  * timestamp resolition. JRA. */
  72 /* Changed to version21 to add chflags operation -- jpeach */
  73 #define SMB_VFS_INTERFACE_VERSION 21
  74
  75
  76 /* to bug old modules which are trying to compile with the old functions */
  77 #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 };
  78 #define lp_parm_string __ERROR_please_port_lp_parm_string_to_lp_parm_const_string_or_lp_parm_talloc_string { \
  79   __ERROR_please_port_lp_parm_string_to_lp_parm_const_string_or_lp_parm_talloc_string };
  80 #define lp_vfs_options __ERROR_please_donot_use_lp_vfs_options_anymore_use_lp_parm_xxxx_functions_instead { \
  81   __ERROR_please_donot_use_lp_vfs_options_anymore_use_lp_parm_xxxx_functions_instead };
  82
  83 /*
  84     All intercepted VFS operations must be declared as static functions inside module source
  85     in order to keep smbd namespace unpolluted. See source of audit, extd_audit, fake_perms and recycle
  86     example VFS modules for more details.
  87 */
  88
  89 /* VFS operations structure */
  90
  91 struct vfs_handle_struct;
  92 struct connection_struct;
  93 struct files_struct;
  94 struct security_descriptor_info;
  95 struct vfs_statvfs_struct;
  96
  97 /*
  98     Available VFS operations. These values must be in sync with vfs_ops struct
  99     (struct vfs_fn_pointers and struct vfs_handle_pointers inside of struct vfs_ops).
 100     In particular, if new operations are added to vfs_ops, appropriate constants
 101     should be added to vfs_op_type so that order of them kept same as in vfs_ops.
 102 */
 103
 104 typedef enum _vfs_op_type {
 105         SMB_VFS_OP_NOOP = -1,
 106
 107         /* Disk operations */
 108
 109         SMB_VFS_OP_CONNECT = 0,
 110         SMB_VFS_OP_DISCONNECT,
 111         SMB_VFS_OP_DISK_FREE,
 112         SMB_VFS_OP_GET_QUOTA,
 113         SMB_VFS_OP_SET_QUOTA,
 114         SMB_VFS_OP_GET_SHADOW_COPY_DATA,
 115         SMB_VFS_OP_STATVFS,
 116
 117         /* Directory operations */
 118
 119         SMB_VFS_OP_OPENDIR,
 120         SMB_VFS_OP_READDIR,
 121         SMB_VFS_OP_SEEKDIR,
 122         SMB_VFS_OP_TELLDIR,
 123         SMB_VFS_OP_REWINDDIR,
 124         SMB_VFS_OP_MKDIR,
 125         SMB_VFS_OP_RMDIR,
 126         SMB_VFS_OP_CLOSEDIR,
 127
 128         /* File operations */
 129
 130         SMB_VFS_OP_OPEN,
 131         SMB_VFS_OP_CLOSE,
 132         SMB_VFS_OP_READ,
 133         SMB_VFS_OP_PREAD,
 134         SMB_VFS_OP_WRITE,
 135         SMB_VFS_OP_PWRITE,
 136         SMB_VFS_OP_LSEEK,
 137         SMB_VFS_OP_SENDFILE,
 138         SMB_VFS_OP_RENAME,
 139         SMB_VFS_OP_FSYNC,
 140         SMB_VFS_OP_STAT,
 141         SMB_VFS_OP_FSTAT,
 142         SMB_VFS_OP_LSTAT,
 143         SMB_VFS_OP_UNLINK,
 144         SMB_VFS_OP_CHMOD,
 145         SMB_VFS_OP_FCHMOD,
 146         SMB_VFS_OP_CHOWN,
 147         SMB_VFS_OP_FCHOWN,
 148         SMB_VFS_OP_CHDIR,
 149         SMB_VFS_OP_GETWD,
 150         SMB_VFS_OP_NTIMES,
 151         SMB_VFS_OP_FTRUNCATE,
 152         SMB_VFS_OP_LOCK,
 153         SMB_VFS_OP_KERNEL_FLOCK,
 154         SMB_VFS_OP_LINUX_SETLEASE,
 155         SMB_VFS_OP_GETLOCK,
 156         SMB_VFS_OP_SYMLINK,
 157         SMB_VFS_OP_READLINK,
 158         SMB_VFS_OP_LINK,
 159         SMB_VFS_OP_MKNOD,
 160         SMB_VFS_OP_REALPATH,
 161         SMB_VFS_OP_NOTIFY_WATCH,
 162         SMB_VFS_OP_CHFLAGS,
 163
 164         /* NT ACL operations. */
 165
 166         SMB_VFS_OP_FGET_NT_ACL,
 167         SMB_VFS_OP_GET_NT_ACL,
 168         SMB_VFS_OP_FSET_NT_ACL,
 169         SMB_VFS_OP_SET_NT_ACL,
 170
 171         /* POSIX ACL operations. */
 172
 173         SMB_VFS_OP_CHMOD_ACL,
 174         SMB_VFS_OP_FCHMOD_ACL,
 175
 176         SMB_VFS_OP_SYS_ACL_GET_ENTRY,
 177         SMB_VFS_OP_SYS_ACL_GET_TAG_TYPE,
 178         SMB_VFS_OP_SYS_ACL_GET_PERMSET,
 179         SMB_VFS_OP_SYS_ACL_GET_QUALIFIER,
 180         SMB_VFS_OP_SYS_ACL_GET_FILE,
 181         SMB_VFS_OP_SYS_ACL_GET_FD,
 182         SMB_VFS_OP_SYS_ACL_CLEAR_PERMS,
 183         SMB_VFS_OP_SYS_ACL_ADD_PERM,
 184         SMB_VFS_OP_SYS_ACL_TO_TEXT,
 185         SMB_VFS_OP_SYS_ACL_INIT,
 186         SMB_VFS_OP_SYS_ACL_CREATE_ENTRY,
 187         SMB_VFS_OP_SYS_ACL_SET_TAG_TYPE,
 188         SMB_VFS_OP_SYS_ACL_SET_QUALIFIER,
 189         SMB_VFS_OP_SYS_ACL_SET_PERMSET,
 190         SMB_VFS_OP_SYS_ACL_VALID,
 191         SMB_VFS_OP_SYS_ACL_SET_FILE,
 192         SMB_VFS_OP_SYS_ACL_SET_FD,
 193         SMB_VFS_OP_SYS_ACL_DELETE_DEF_FILE,
 194         SMB_VFS_OP_SYS_ACL_GET_PERM,
 195         SMB_VFS_OP_SYS_ACL_FREE_TEXT,
 196         SMB_VFS_OP_SYS_ACL_FREE_ACL,
 197         SMB_VFS_OP_SYS_ACL_FREE_QUALIFIER,
 198
 199         /* EA operations. */
 200         SMB_VFS_OP_GETXATTR,
 201         SMB_VFS_OP_LGETXATTR,
 202         SMB_VFS_OP_FGETXATTR,
 203         SMB_VFS_OP_LISTXATTR,
 204         SMB_VFS_OP_LLISTXATTR,
 205         SMB_VFS_OP_FLISTXATTR,
 206         SMB_VFS_OP_REMOVEXATTR,
 207         SMB_VFS_OP_LREMOVEXATTR,
 208         SMB_VFS_OP_FREMOVEXATTR,
 209         SMB_VFS_OP_SETXATTR,
 210         SMB_VFS_OP_LSETXATTR,
 211         SMB_VFS_OP_FSETXATTR,
 212
 213         /* aio operations */
 214         SMB_VFS_OP_AIO_READ,
 215         SMB_VFS_OP_AIO_WRITE,
 216         SMB_VFS_OP_AIO_RETURN,
 217         SMB_VFS_OP_AIO_CANCEL,
 218         SMB_VFS_OP_AIO_ERROR,
 219         SMB_VFS_OP_AIO_FSYNC,
 220         SMB_VFS_OP_AIO_SUSPEND,
 221
 222         /* This should always be last enum value */
 223
 224         SMB_VFS_OP_LAST
 225 } vfs_op_type;
 226
 227 /*
 228     Please keep vfs_op_type, struct vfs_fn_pointers and struct vfs_handles_pointers in sync.
 229 */
 230 struct vfs_ops {
 231         struct vfs_fn_pointers {
 232                 /* Disk operations */
 233
 234                 int (*connect_fn)(struct vfs_handle_struct *handle, const char *service, const char *user);
 235                 void (*disconnect)(struct vfs_handle_struct *handle);
 236                 SMB_BIG_UINT (*disk_free)(struct vfs_handle_struct *handle, const char *path, BOOL small_query, SMB_BIG_UINT *bsize,
 237                         SMB_BIG_UINT *dfree, SMB_BIG_UINT *dsize);
 238                 int (*get_quota)(struct vfs_handle_struct *handle, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *qt);
 239                 int (*set_quota)(struct vfs_handle_struct *handle, enum SMB_QUOTA_TYPE qtype, unid_t id, SMB_DISK_QUOTA *qt);
 240                 int (*get_shadow_copy_data)(struct vfs_handle_struct *handle, struct files_struct *fsp, SHADOW_COPY_DATA *shadow_copy_data, BOOL labels);
 241                 int (*statvfs)(struct vfs_handle_struct *handle, const char *path, struct vfs_statvfs_struct *statbuf);
 242
 243                 /* Directory operations */
 244
 245                 SMB_STRUCT_DIR *(*opendir)(struct vfs_handle_struct *handle, const char *fname, const char *mask, uint32 attributes);
 246                 SMB_STRUCT_DIRENT *(*readdir)(struct vfs_handle_struct *handle, SMB_STRUCT_DIR *dirp);
 247                 void (*seekdir)(struct vfs_handle_struct *handle, SMB_STRUCT_DIR *dirp, long offset);
 248                 long (*telldir)(struct vfs_handle_struct *handle, SMB_STRUCT_DIR *dirp);
 249                 void (*rewind_dir)(struct vfs_handle_struct *handle, SMB_STRUCT_DIR *dirp);
 250                 int (*mkdir)(struct vfs_handle_struct *handle, const char *path, mode_t mode);
 251                 int (*rmdir)(struct vfs_handle_struct *handle, const char *path);
 252                 int (*closedir)(struct vfs_handle_struct *handle, SMB_STRUCT_DIR *dir);
 253
 254                 /* File operations */
 255
 256                 int (*open)(struct vfs_handle_struct *handle, const char *fname, files_struct *fsp, int flags, mode_t mode);
 257                 int (*close_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd);
 258                 ssize_t (*read)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, void *data, size_t n);
 259                 ssize_t (*pread)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, void *data, size_t n, SMB_OFF_T offset);
 260                 ssize_t (*write)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, const void *data, size_t n);
 261                 ssize_t (*pwrite)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, const void *data, size_t n, SMB_OFF_T offset);
 262                 SMB_OFF_T (*lseek)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, SMB_OFF_T offset, int whence);
 263                 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);
 264                 int (*rename)(struct vfs_handle_struct *handle, const char *oldname, const char *newname);
 265                 int (*fsync)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd);
 266                 int (*stat)(struct vfs_handle_struct *handle, const char *fname, SMB_STRUCT_STAT *sbuf);
 267                 int (*fstat)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, SMB_STRUCT_STAT *sbuf);
 268                 int (*lstat)(struct vfs_handle_struct *handle, const char *path, SMB_STRUCT_STAT *sbuf);
 269                 int (*unlink)(struct vfs_handle_struct *handle, const char *path);
 270                 int (*chmod)(struct vfs_handle_struct *handle, const char *path, mode_t mode);
 271                 int (*fchmod)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, mode_t mode);
 272                 int (*chown)(struct vfs_handle_struct *handle, const char *path, uid_t uid, gid_t gid);
 273                 int (*fchown)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, uid_t uid, gid_t gid);
 274                 int (*chdir)(struct vfs_handle_struct *handle, const char *path);
 275                 char *(*getwd)(struct vfs_handle_struct *handle, char *buf);
 276                 int (*ntimes)(struct vfs_handle_struct *handle, const char *path, const struct timespec ts[2]);
 277                 int (*ftruncate)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, SMB_OFF_T offset);
 278                 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);
 279                 int (*kernel_flock)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, uint32 share_mode);
 280                 int (*linux_setlease)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, int leasetype);
 281                 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);
 282                 int (*symlink)(struct vfs_handle_struct *handle, const char *oldpath, const char *newpath);
 283                 int (*readlink)(struct vfs_handle_struct *handle, const char *path, char *buf, size_t bufsiz);
 284                 int (*link)(struct vfs_handle_struct *handle, const char *oldpath, const char *newpath);
 285                 int (*mknod)(struct vfs_handle_struct *handle, const char *path, mode_t mode, SMB_DEV_T dev);
 286                 char *(*realpath)(struct vfs_handle_struct *handle, const char *path, char *resolved_path);
 287                 NTSTATUS (*notify_watch)(struct vfs_handle_struct *handle,
 288                                          struct sys_notify_context *ctx,
 289                                          struct notify_entry *e,
 290                                          void (*callback)(struct sys_notify_context *ctx,
 291                                                           void *private_data,
 292                                                           struct notify_event *ev),
 293                                          void *private_data, void *handle_p);
 294                 int (*chflags)(struct vfs_handle_struct *handle, const char *path, uint flags);
 295
 296                 /* NT ACL operations. */
 297
 298                 size_t (*fget_nt_acl)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd,  uint32 security_info, struct security_descriptor_info **ppdesc);
 299                 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);
 300                 BOOL (*fset_nt_acl)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, uint32 security_info_sent, struct security_descriptor_info *psd);
 301                 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);
 302
 303                 /* POSIX ACL operations. */
 304
 305                 int (*chmod_acl)(struct vfs_handle_struct *handle, const char *name, mode_t mode);
 306                 int (*fchmod_acl)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, mode_t mode);
 307
 308                 int (*sys_acl_get_entry)(struct vfs_handle_struct *handle, SMB_ACL_T theacl, int entry_id, SMB_ACL_ENTRY_T *entry_p);
 309                 int (*sys_acl_get_tag_type)(struct vfs_handle_struct *handle, SMB_ACL_ENTRY_T entry_d, SMB_ACL_TAG_T *tag_type_p);
 310                 int (*sys_acl_get_permset)(struct vfs_handle_struct *handle, SMB_ACL_ENTRY_T entry_d, SMB_ACL_PERMSET_T *permset_p);
 311                 void * (*sys_acl_get_qualifier)(struct vfs_handle_struct *handle, SMB_ACL_ENTRY_T entry_d);
 312                 SMB_ACL_T (*sys_acl_get_file)(struct vfs_handle_struct *handle, const char *path_p, SMB_ACL_TYPE_T type);
 313                 SMB_ACL_T (*sys_acl_get_fd)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd);
 314                 int (*sys_acl_clear_perms)(struct vfs_handle_struct *handle, SMB_ACL_PERMSET_T permset);
 315                 int (*sys_acl_add_perm)(struct vfs_handle_struct *handle, SMB_ACL_PERMSET_T permset, SMB_ACL_PERM_T perm);
 316                 char * (*sys_acl_to_text)(struct vfs_handle_struct *handle, SMB_ACL_T theacl, ssize_t *plen);
 317                 SMB_ACL_T (*sys_acl_init)(struct vfs_handle_struct *handle, int count);
 318                 int (*sys_acl_create_entry)(struct vfs_handle_struct *handle, SMB_ACL_T *pacl, SMB_ACL_ENTRY_T *pentry);
 319                 int (*sys_acl_set_tag_type)(struct vfs_handle_struct *handle, SMB_ACL_ENTRY_T entry, SMB_ACL_TAG_T tagtype);
 320                 int (*sys_acl_set_qualifier)(struct vfs_handle_struct *handle, SMB_ACL_ENTRY_T entry, void *qual);
 321                 int (*sys_acl_set_permset)(struct vfs_handle_struct *handle, SMB_ACL_ENTRY_T entry, SMB_ACL_PERMSET_T permset);
 322                 int (*sys_acl_valid)(struct vfs_handle_struct *handle, SMB_ACL_T theacl );
 323                 int (*sys_acl_set_file)(struct vfs_handle_struct *handle, const char *name, SMB_ACL_TYPE_T acltype, SMB_ACL_T theacl);
 324                 int (*sys_acl_set_fd)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, SMB_ACL_T theacl);
 325                 int (*sys_acl_delete_def_file)(struct vfs_handle_struct *handle, const char *path);
 326                 int (*sys_acl_get_perm)(struct vfs_handle_struct *handle, SMB_ACL_PERMSET_T permset, SMB_ACL_PERM_T perm);
 327                 int (*sys_acl_free_text)(struct vfs_handle_struct *handle, char *text);
 328                 int (*sys_acl_free_acl)(struct vfs_handle_struct *handle, SMB_ACL_T posix_acl);
 329                 int (*sys_acl_free_qualifier)(struct vfs_handle_struct *handle, void *qualifier, SMB_ACL_TAG_T tagtype);
 330
 331                 /* EA operations. */
 332                 ssize_t (*getxattr)(struct vfs_handle_struct *handle,const char *path, const char *name, void *value, size_t size);
 333                 ssize_t (*lgetxattr)(struct vfs_handle_struct *handle,const char *path, const char *name, void *value, size_t size);
 334                 ssize_t (*fgetxattr)(struct vfs_handle_struct *handle, struct files_struct *fsp,int fd, const char *name, void *value, size_t size);
 335                 ssize_t (*listxattr)(struct vfs_handle_struct *handle, const char *path, char *list, size_t size);
 336                 ssize_t (*llistxattr)(struct vfs_handle_struct *handle, const char *path, char *list, size_t size);
 337                 ssize_t (*flistxattr)(struct vfs_handle_struct *handle, struct files_struct *fsp,int fd, char *list, size_t size);
 338                 int (*removexattr)(struct vfs_handle_struct *handle, const char *path, const char *name);
 339                 int (*lremovexattr)(struct vfs_handle_struct *handle, const char *path, const char *name);
 340                 int (*fremovexattr)(struct vfs_handle_struct *handle, struct files_struct *fsp,int filedes, const char *name);
 341                 int (*setxattr)(struct vfs_handle_struct *handle, const char *path, const char *name, const void *value, size_t size, int flags);
 342                 int (*lsetxattr)(struct vfs_handle_struct *handle, const char *path, const char *name, const void *value, size_t size, int flags);
 343                 int (*fsetxattr)(struct vfs_handle_struct *handle, struct files_struct *fsp,int filedes, const char *name, const void *value, size_t size, int flags);
 344
 345                 /* aio operations */
 346                 int (*aio_read)(struct vfs_handle_struct *handle, struct files_struct *fsp, SMB_STRUCT_AIOCB *aiocb);
 347                 int (*aio_write)(struct vfs_handle_struct *handle, struct files_struct *fsp, SMB_STRUCT_AIOCB *aiocb);
 348                 ssize_t (*aio_return_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, SMB_STRUCT_AIOCB *aiocb);
 349                 int (*aio_cancel)(struct vfs_handle_struct *handle, struct files_struct *fsp, int fd, SMB_STRUCT_AIOCB *aiocb);
 350                 int (*aio_error_fn)(struct vfs_handle_struct *handle, struct files_struct *fsp, SMB_STRUCT_AIOCB *aiocb);
 351                 int (*aio_fsync)(struct vfs_handle_struct *handle, struct files_struct *fsp, int op, SMB_STRUCT_AIOCB *aiocb);
 352                 int (*aio_suspend)(struct vfs_handle_struct *handle, struct files_struct *fsp, const SMB_STRUCT_AIOCB * const aiocb[], int n, const struct timespec *timeout);
 353
 354         } ops;
 355
 356         struct vfs_handles_pointers {
 357                 /* Disk operations */
 358
 359                 struct vfs_handle_struct *connect_hnd;
 360                 struct vfs_handle_struct *disconnect;
 361                 struct vfs_handle_struct *disk_free;
 362                 struct vfs_handle_struct *get_quota;
 363                 struct vfs_handle_struct *set_quota;
 364                 struct vfs_handle_struct *get_shadow_copy_data;
 365                 struct vfs_handle_struct *statvfs;
 366
 367                 /* Directory operations */
 368
 369                 struct vfs_handle_struct *opendir;
 370                 struct vfs_handle_struct *readdir;
 371                 struct vfs_handle_struct *seekdir;
 372                 struct vfs_handle_struct *telldir;
 373                 struct vfs_handle_struct *rewind_dir;
 374                 struct vfs_handle_struct *mkdir;
 375                 struct vfs_handle_struct *rmdir;
 376                 struct vfs_handle_struct *closedir;
 377
 378                 /* File operations */
 379
 380                 struct vfs_handle_struct *open;
 381                 struct vfs_handle_struct *close_hnd;
 382                 struct vfs_handle_struct *read;
 383                 struct vfs_handle_struct *pread;
 384                 struct vfs_handle_struct *write;
 385                 struct vfs_handle_struct *pwrite;
 386                 struct vfs_handle_struct *lseek;
 387                 struct vfs_handle_struct *sendfile;
 388                 struct vfs_handle_struct *rename;
 389                 struct vfs_handle_struct *fsync;
 390                 struct vfs_handle_struct *stat;
 391                 struct vfs_handle_struct *fstat;
 392                 struct vfs_handle_struct *lstat;
 393                 struct vfs_handle_struct *unlink;
 394                 struct vfs_handle_struct *chmod;
 395                 struct vfs_handle_struct *fchmod;
 396                 struct vfs_handle_struct *chown;
 397                 struct vfs_handle_struct *fchown;
 398                 struct vfs_handle_struct *chdir;
 399                 struct vfs_handle_struct *getwd;
 400                 struct vfs_handle_struct *ntimes;
 401                 struct vfs_handle_struct *ftruncate;
 402                 struct vfs_handle_struct *lock;
 403                 struct vfs_handle_struct *kernel_flock;
 404                 struct vfs_handle_struct *linux_setlease;
 405                 struct vfs_handle_struct *getlock;
 406                 struct vfs_handle_struct *symlink;
 407                 struct vfs_handle_struct *readlink;
 408                 struct vfs_handle_struct *link;
 409                 struct vfs_handle_struct *mknod;
 410                 struct vfs_handle_struct *realpath;
 411                 struct vfs_handle_struct *notify_watch;
 412                 struct vfs_handle_struct *chflags;
 413
 414                 /* NT ACL operations. */
 415
 416                 struct vfs_handle_struct *fget_nt_acl;
 417                 struct vfs_handle_struct *get_nt_acl;
 418                 struct vfs_handle_struct *fset_nt_acl;
 419                 struct vfs_handle_struct *set_nt_acl;
 420
 421                 /* POSIX ACL operations. */
 422
 423                 struct vfs_handle_struct *chmod_acl;
 424                 struct vfs_handle_struct *fchmod_acl;
 425
 426                 struct vfs_handle_struct *sys_acl_get_entry;
 427                 struct vfs_handle_struct *sys_acl_get_tag_type;
 428                 struct vfs_handle_struct *sys_acl_get_permset;
 429                 struct vfs_handle_struct *sys_acl_get_qualifier;
 430                 struct vfs_handle_struct *sys_acl_get_file;
 431                 struct vfs_handle_struct *sys_acl_get_fd;
 432                 struct vfs_handle_struct *sys_acl_clear_perms;
 433                 struct vfs_handle_struct *sys_acl_add_perm;
 434                 struct vfs_handle_struct *sys_acl_to_text;
 435                 struct vfs_handle_struct *sys_acl_init;
 436                 struct vfs_handle_struct *sys_acl_create_entry;
 437                 struct vfs_handle_struct *sys_acl_set_tag_type;
 438                 struct vfs_handle_struct *sys_acl_set_qualifier;
 439                 struct vfs_handle_struct *sys_acl_set_permset;
 440                 struct vfs_handle_struct *sys_acl_valid;
 441                 struct vfs_handle_struct *sys_acl_set_file;
 442                 struct vfs_handle_struct *sys_acl_set_fd;
 443                 struct vfs_handle_struct *sys_acl_delete_def_file;
 444                 struct vfs_handle_struct *sys_acl_get_perm;
 445                 struct vfs_handle_struct *sys_acl_free_text;
 446                 struct vfs_handle_struct *sys_acl_free_acl;
 447                 struct vfs_handle_struct *sys_acl_free_qualifier;
 448
 449                 /* EA operations. */
 450                 struct vfs_handle_struct *getxattr;
 451                 struct vfs_handle_struct *lgetxattr;
 452                 struct vfs_handle_struct *fgetxattr;
 453                 struct vfs_handle_struct *listxattr;
 454                 struct vfs_handle_struct *llistxattr;
 455                 struct vfs_handle_struct *flistxattr;
 456                 struct vfs_handle_struct *removexattr;
 457                 struct vfs_handle_struct *lremovexattr;
 458                 struct vfs_handle_struct *fremovexattr;
 459                 struct vfs_handle_struct *setxattr;
 460                 struct vfs_handle_struct *lsetxattr;
 461                 struct vfs_handle_struct *fsetxattr;
 462
 463                 /* aio operations */
 464                 struct vfs_handle_struct *aio_read;
 465                 struct vfs_handle_struct *aio_write;
 466                 struct vfs_handle_struct *aio_return;
 467                 struct vfs_handle_struct *aio_cancel;
 468                 struct vfs_handle_struct *aio_error;
 469                 struct vfs_handle_struct *aio_fsync;
 470                 struct vfs_handle_struct *aio_suspend;
 471         } handles;
 472 };
 473
 474 /*
 475     Possible VFS operation layers (per-operation)
 476
 477     These values are used by VFS subsystem when building vfs_ops for connection
 478     from multiple VFS modules. Internally, Samba differentiates only opaque and
 479     transparent layers at this process. Other types are used for providing better
 480     diagnosing facilities.
 481
 482     Most modules will provide transparent layers. Opaque layer is for modules
 483     which implement actual file system calls (like DB-based VFS). For example,
 484     default POSIX VFS which is built in into Samba is an opaque VFS module.
 485
 486     Other layer types (audit, splitter, scanner) were designed to provide different
 487     degree of transparency and for diagnosing VFS module behaviour.
 488
 489     Each module can implement several layers at the same time provided that only
 490     one layer is used per each operation.
 491
 492 */
 493
 494 typedef enum _vfs_op_layer {
 495         SMB_VFS_LAYER_NOOP = -1,        /* - For using in VFS module to indicate end of array */
 496                                         /*   of operations description */
 497         SMB_VFS_LAYER_OPAQUE = 0,       /* - Final level, does not call anything beyond itself */
 498         SMB_VFS_LAYER_TRANSPARENT,      /* - Normal operation, calls underlying layer after */
 499                                         /*   possibly changing passed data */
 500         SMB_VFS_LAYER_LOGGER,           /* - Logs data, calls underlying layer, logging may not */
 501                                         /*   use Samba VFS */
 502         SMB_VFS_LAYER_SPLITTER,         /* - Splits operation, calls underlying layer _and_ own facility, */
 503                                         /*   then combines result */
 504         SMB_VFS_LAYER_SCANNER           /* - Checks data and possibly initiates additional */
 505                                         /*   file activity like logging to files _inside_ samba VFS */
 506 } vfs_op_layer;
 507
 508 /*
 509     VFS operation description. Each VFS module registers an array of vfs_op_tuple to VFS subsystem,
 510     which describes all operations this module is willing to intercept.
 511     VFS subsystem initializes then the conn->vfs_ops and conn->vfs_opaque_ops structs
 512     using this information.
 513 */
 514
 515 typedef struct vfs_op_tuple {
 516         void* op;
 517         vfs_op_type type;
 518         vfs_op_layer layer;
 519 } vfs_op_tuple;
 520
 521
 522 typedef struct vfs_handle_struct {
 523         struct vfs_handle_struct  *next, *prev;
 524         const char *param;
 525         struct vfs_ops vfs_next;
 526         struct connection_struct *conn;
 527         void *data;
 528         void (*free_data)(void **data);
 529 } vfs_handle_struct;
 530
 531
 532 typedef struct vfs_statvfs_struct {
 533         /* For undefined recommended transfer size return -1 in that field */
 534         uint32 OptimalTransferSize;  /* bsize on some os, iosize on other os */
 535         uint32 BlockSize;
 536
 537         /*
 538          The next three fields are in terms of the block size.
 539          (above). If block size is unknown, 4096 would be a
 540          reasonable block size for a server to report.
 541          Note that returning the blocks/blocksavail removes need
 542          to make a second call (to QFSInfo level 0x103 to get this info.
 543          UserBlockAvail is typically less than or equal to BlocksAvail,
 544          if no distinction is made return the same value in each.
 545         */
 546
 547         SMB_BIG_UINT TotalBlocks;
 548         SMB_BIG_UINT BlocksAvail;       /* bfree */
 549         SMB_BIG_UINT UserBlocksAvail;   /* bavail */
 550
 551         /* For undefined Node fields or FSID return -1 */
 552         SMB_BIG_UINT TotalFileNodes;
 553         SMB_BIG_UINT FreeFileNodes;
 554         SMB_BIG_UINT FsIdentifier;   /* fsid */
 555         /* NB Namelen comes from FILE_SYSTEM_ATTRIBUTE_INFO call */
 556         /* NB flags can come from FILE_SYSTEM_DEVICE_INFO call   */
 557 } vfs_statvfs_struct;
 558
 559 #define VFS_ADD_FSP_EXTENSION(handle, fsp, type) \
 560     vfs_add_fsp_extension_notype(handle, (fsp), sizeof(type))
 561
 562 #define VFS_FETCH_FSP_EXTENSION(handle, fsp) \
 563     vfs_fetch_fsp_extension(handle, (fsp))
 564
 565 #define VFS_REMOVE_FSP_EXTENSION(handle, fsp) \
 566     vfs_remove_fsp_extension((handle), (fsp))
 567
 568 #define SMB_VFS_HANDLE_GET_DATA(handle, datap, type, ret) { \
 569         if (!(handle)||((datap=(type *)(handle)->data)==NULL)) { \
 570                 DEBUG(0,("%s() failed to get vfs_handle->data!\n",FUNCTION_MACRO)); \
 571                 ret; \
 572         } \
 573 }
 574
 575 #define SMB_VFS_HANDLE_SET_DATA(handle, datap, free_fn, type, ret) { \
 576         if (!(handle)) { \
 577                 DEBUG(0,("%s() failed to set handle->data!\n",FUNCTION_MACRO)); \
 578                 ret; \
 579         } else { \
 580                 if ((handle)->free_data) { \
 581                         (handle)->free_data(&(handle)->data); \
 582                 } \
 583                 (handle)->data = (void *)datap; \
 584                 (handle)->free_data = free_fn; \
 585         } \
 586 }
 587
 588 #define SMB_VFS_HANDLE_FREE_DATA(handle) { \
 589         if ((handle) && (handle)->free_data) { \
 590                 (handle)->free_data(&(handle)->data); \
 591         } \
 592 }
 593
 594 /* Check whether module-specific data handle was already allocated or not */
 595 #define SMB_VFS_HANDLE_TEST_DATA(handle)  ( !(handle) || !(handle)->data ? False : True )
 596
 597 #define SMB_VFS_OP(x) ((void *) x)
 598
 599 #define DEFAULT_VFS_MODULE_NAME "/[Default VFS]/"
 600
 601 #include "vfs_macros.h"
 602
 603 #endif /* _VFS_H */