fs/orangefs/protocol.h

   1 #include <linux/kernel.h>
   2 #include <linux/types.h>
   3 #include <linux/spinlock_types.h>
   4 #include <linux/slab.h>
   5 #include <linux/ioctl.h>
   6
   7 extern struct client_debug_mask *cdm_array;
   8 extern char *debug_help_string;
   9 extern int help_string_initialized;
  10 extern struct dentry *debug_dir;
  11 extern struct dentry *help_file_dentry;
  12 extern struct dentry *client_debug_dentry;
  13 extern const struct file_operations debug_help_fops;
  14 extern int client_all_index;
  15 extern int client_verbose_index;
  16 extern int cdm_element_count;
  17 #define DEBUG_HELP_STRING_SIZE 4096
  18 #define HELP_STRING_UNINITIALIZED \
  19         "Client Debug Keywords are unknown until the first time\n" \
  20         "the client is started after boot.\n"
  21 #define ORANGEFS_KMOD_DEBUG_HELP_FILE "debug-help"
  22 #define ORANGEFS_KMOD_DEBUG_FILE "kernel-debug"
  23 #define ORANGEFS_CLIENT_DEBUG_FILE "client-debug"
  24 #define ORANGEFS_VERBOSE "verbose"
  25 #define ORANGEFS_ALL "all"
  26
  27 /* pvfs2-config.h ***********************************************************/
  28 #define ORANGEFS_VERSION_MAJOR 2
  29 #define ORANGEFS_VERSION_MINOR 9
  30 #define ORANGEFS_VERSION_SUB 0
  31
  32 /* khandle stuff  ***********************************************************/
  33
  34 /*
  35  * The 2.9 core will put 64 bit handles in here like this:
  36  *    1234 0000 0000 5678
  37  * The 3.0 and beyond cores will put 128 bit handles in here like this:
  38  *    1234 5678 90AB CDEF
  39  * The kernel module will always use the first four bytes and
  40  * the last four bytes as an inum.
  41  */
  42 struct orangefs_khandle {
  43         unsigned char u[16];
  44 }  __aligned(8);
  45
  46 /*
  47  * kernel version of an object ref.
  48  */
  49 struct orangefs_object_kref {
  50         struct orangefs_khandle khandle;
  51         __s32 fs_id;
  52         __s32 __pad1;
  53 };
  54
  55 /*
  56  * compare 2 khandles assumes little endian thus from large address to
  57  * small address
  58  */
  59 static inline int ORANGEFS_khandle_cmp(const struct orangefs_khandle *kh1,
  60                                    const struct orangefs_khandle *kh2)
  61 {
  62         int i;
  63
  64         for (i = 15; i >= 0; i--) {
  65                 if (kh1->u[i] > kh2->u[i])
  66                         return 1;
  67                 if (kh1->u[i] < kh2->u[i])
  68                         return -1;
  69         }
  70
  71         return 0;
  72 }
  73
  74 static inline void ORANGEFS_khandle_to(const struct orangefs_khandle *kh,
  75                                    void *p, int size)
  76 {
  77
  78         memcpy(p, kh->u, 16);
  79         memset(p + 16, 0, size - 16);
  80
  81 }
  82
  83 static inline void ORANGEFS_khandle_from(struct orangefs_khandle *kh,
  84                                      void *p, int size)
  85 {
  86         memset(kh, 0, 16);
  87         memcpy(kh->u, p, 16);
  88
  89 }
  90
  91 /* pvfs2-types.h ************************************************************/
  92 typedef __u32 ORANGEFS_uid;
  93 typedef __u32 ORANGEFS_gid;
  94 typedef __s32 ORANGEFS_fs_id;
  95 typedef __u32 ORANGEFS_permissions;
  96 typedef __u64 ORANGEFS_time;
  97 typedef __s64 ORANGEFS_size;
  98 typedef __u64 ORANGEFS_flags;
  99 typedef __u64 ORANGEFS_ds_position;
 100 typedef __s32 ORANGEFS_error;
 101 typedef __s64 ORANGEFS_offset;
 102
 103 #define ORANGEFS_SUPER_MAGIC 0x20030528
 104
 105 /*
 106  * ORANGEFS error codes are a signed 32-bit integer. Error codes are negative, but
 107  * the sign is stripped before decoding.
 108  */
 109
 110 /* Bit 31 is not used since it is the sign. */
 111
 112 /*
 113  * Bit 30 specifies that this is a ORANGEFS error. A ORANGEFS error is either an
 114  * encoded errno value or a ORANGEFS protocol error.
 115  */
 116 #define ORANGEFS_ERROR_BIT (1 << 30)
 117
 118 /*
 119  * Bit 29 specifies that this is a ORANGEFS protocol error and not an encoded
 120  * errno value.
 121  */
 122 #define ORANGEFS_NON_ERRNO_ERROR_BIT (1 << 29)
 123
 124 /*
 125  * Bits 9, 8, and 7 specify the error class, which encodes the section of
 126  * server code the error originated in for logging purposes. It is not used
 127  * in the kernel except to be masked out.
 128  */
 129 #define ORANGEFS_ERROR_CLASS_BITS 0x380
 130
 131 /* Bits 6 - 0 are reserved for the actual error code. */
 132 #define ORANGEFS_ERROR_NUMBER_BITS 0x7f
 133
 134 /* Encoded errno values decoded by PINT_errno_mapping in orangefs-utils.c. */
 135
 136 /* Our own ORANGEFS protocol error codes. */
 137 #define ORANGEFS_ECANCEL    (1|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
 138 #define ORANGEFS_EDEVINIT   (2|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
 139 #define ORANGEFS_EDETAIL    (3|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
 140 #define ORANGEFS_EHOSTNTFD  (4|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
 141 #define ORANGEFS_EADDRNTFD  (5|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
 142 #define ORANGEFS_ENORECVR   (6|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
 143 #define ORANGEFS_ETRYAGAIN  (7|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
 144 #define ORANGEFS_ENOTPVFS   (8|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
 145 #define ORANGEFS_ESECURITY  (9|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
 146
 147 /* permission bits */
 148 #define ORANGEFS_O_EXECUTE (1 << 0)
 149 #define ORANGEFS_O_WRITE   (1 << 1)
 150 #define ORANGEFS_O_READ    (1 << 2)
 151 #define ORANGEFS_G_EXECUTE (1 << 3)
 152 #define ORANGEFS_G_WRITE   (1 << 4)
 153 #define ORANGEFS_G_READ    (1 << 5)
 154 #define ORANGEFS_U_EXECUTE (1 << 6)
 155 #define ORANGEFS_U_WRITE   (1 << 7)
 156 #define ORANGEFS_U_READ    (1 << 8)
 157 /* no ORANGEFS_U_VTX (sticky bit) */
 158 #define ORANGEFS_G_SGID    (1 << 10)
 159 #define ORANGEFS_U_SUID    (1 << 11)
 160
 161 /* definition taken from stdint.h */
 162 #define INT32_MAX (2147483647)
 163 #define ORANGEFS_ITERATE_START    (INT32_MAX - 1)
 164 #define ORANGEFS_ITERATE_END      (INT32_MAX - 2)
 165 #define ORANGEFS_ITERATE_NEXT     (INT32_MAX - 3)
 166 #define ORANGEFS_READDIR_START ORANGEFS_ITERATE_START
 167 #define ORANGEFS_READDIR_END   ORANGEFS_ITERATE_END
 168 #define ORANGEFS_IMMUTABLE_FL FS_IMMUTABLE_FL
 169 #define ORANGEFS_APPEND_FL    FS_APPEND_FL
 170 #define ORANGEFS_NOATIME_FL   FS_NOATIME_FL
 171 #define ORANGEFS_MIRROR_FL    0x01000000ULL
 172 #define ORANGEFS_O_EXECUTE (1 << 0)
 173 #define ORANGEFS_FS_ID_NULL       ((__s32)0)
 174 #define ORANGEFS_ATTR_SYS_UID                   (1 << 0)
 175 #define ORANGEFS_ATTR_SYS_GID                   (1 << 1)
 176 #define ORANGEFS_ATTR_SYS_PERM                  (1 << 2)
 177 #define ORANGEFS_ATTR_SYS_ATIME                 (1 << 3)
 178 #define ORANGEFS_ATTR_SYS_CTIME                 (1 << 4)
 179 #define ORANGEFS_ATTR_SYS_MTIME                 (1 << 5)
 180 #define ORANGEFS_ATTR_SYS_TYPE                  (1 << 6)
 181 #define ORANGEFS_ATTR_SYS_ATIME_SET             (1 << 7)
 182 #define ORANGEFS_ATTR_SYS_MTIME_SET             (1 << 8)
 183 #define ORANGEFS_ATTR_SYS_SIZE                  (1 << 20)
 184 #define ORANGEFS_ATTR_SYS_LNK_TARGET            (1 << 24)
 185 #define ORANGEFS_ATTR_SYS_DFILE_COUNT           (1 << 25)
 186 #define ORANGEFS_ATTR_SYS_DIRENT_COUNT          (1 << 26)
 187 #define ORANGEFS_ATTR_SYS_BLKSIZE               (1 << 28)
 188 #define ORANGEFS_ATTR_SYS_MIRROR_COPIES_COUNT   (1 << 29)
 189 #define ORANGEFS_ATTR_SYS_COMMON_ALL    \
 190         (ORANGEFS_ATTR_SYS_UID  |       \
 191          ORANGEFS_ATTR_SYS_GID  |       \
 192          ORANGEFS_ATTR_SYS_PERM |       \
 193          ORANGEFS_ATTR_SYS_ATIME        |       \
 194          ORANGEFS_ATTR_SYS_CTIME        |       \
 195          ORANGEFS_ATTR_SYS_MTIME        |       \
 196          ORANGEFS_ATTR_SYS_TYPE)
 197
 198 #define ORANGEFS_ATTR_SYS_ALL_SETABLE           \
 199 (ORANGEFS_ATTR_SYS_COMMON_ALL-ORANGEFS_ATTR_SYS_TYPE)
 200
 201 #define ORANGEFS_ATTR_SYS_ALL_NOHINT                    \
 202         (ORANGEFS_ATTR_SYS_COMMON_ALL           |       \
 203          ORANGEFS_ATTR_SYS_SIZE                 |       \
 204          ORANGEFS_ATTR_SYS_LNK_TARGET           |       \
 205          ORANGEFS_ATTR_SYS_DFILE_COUNT          |       \
 206          ORANGEFS_ATTR_SYS_MIRROR_COPIES_COUNT  |       \
 207          ORANGEFS_ATTR_SYS_DIRENT_COUNT         |       \
 208          ORANGEFS_ATTR_SYS_BLKSIZE)
 209
 210 #define ORANGEFS_XATTR_REPLACE 0x2
 211 #define ORANGEFS_XATTR_CREATE  0x1
 212 #define ORANGEFS_MAX_SERVER_ADDR_LEN 256
 213 #define ORANGEFS_NAME_MAX                256
 214 /*
 215  * max extended attribute name len as imposed by the VFS and exploited for the
 216  * upcall request types.
 217  * NOTE: Please retain them as multiples of 8 even if you wish to change them
 218  * This is *NECESSARY* for supporting 32 bit user-space binaries on a 64-bit
 219  * kernel. Due to implementation within DBPF, this really needs to be
 220  * ORANGEFS_NAME_MAX, which it was the same value as, but no reason to let it
 221  * break if that changes in the future.
 222  */
 223 #define ORANGEFS_MAX_XATTR_NAMELEN   ORANGEFS_NAME_MAX  /* Not the same as
 224                                                  * XATTR_NAME_MAX defined
 225                                                  * by <linux/xattr.h>
 226                                                  */
 227 #define ORANGEFS_MAX_XATTR_VALUELEN  8192       /* Not the same as XATTR_SIZE_MAX
 228                                          * defined by <linux/xattr.h>
 229                                          */
 230 #define ORANGEFS_MAX_XATTR_LISTLEN   16 /* Not the same as XATTR_LIST_MAX
 231                                          * defined by <linux/xattr.h>
 232                                          */
 233 /*
 234  * ORANGEFS I/O operation types, used in both system and server interfaces.
 235  */
 236 enum ORANGEFS_io_type {
 237         ORANGEFS_IO_READ = 1,
 238         ORANGEFS_IO_WRITE = 2
 239 };
 240
 241 /*
 242  * If this enum is modified the server parameters related to the precreate pool
 243  * batch and low threshold sizes may need to be modified  to reflect this
 244  * change.
 245  */
 246 enum orangefs_ds_type {
 247         ORANGEFS_TYPE_NONE = 0,
 248         ORANGEFS_TYPE_METAFILE = (1 << 0),
 249         ORANGEFS_TYPE_DATAFILE = (1 << 1),
 250         ORANGEFS_TYPE_DIRECTORY = (1 << 2),
 251         ORANGEFS_TYPE_SYMLINK = (1 << 3),
 252         ORANGEFS_TYPE_DIRDATA = (1 << 4),
 253         ORANGEFS_TYPE_INTERNAL = (1 << 5)       /* for the server's private use */
 254 };
 255
 256 /*
 257  * ORANGEFS_certificate simply stores a buffer with the buffer size.
 258  * The buffer can be converted to an OpenSSL X509 struct for use.
 259  */
 260 struct ORANGEFS_certificate {
 261         __u32 buf_size;
 262         unsigned char *buf;
 263 };
 264
 265 /*
 266  * A credential identifies a user and is signed by the client/user
 267  * private key.
 268  */
 269 struct ORANGEFS_credential {
 270         __u32 userid;   /* user id */
 271         __u32 num_groups;       /* length of group_array */
 272         __u32 *group_array;     /* groups for which the user is a member */
 273         char *issuer;           /* alias of the issuing server */
 274         __u64 timeout;  /* seconds after epoch to time out */
 275         __u32 sig_size; /* length of the signature in bytes */
 276         unsigned char *signature;       /* digital signature */
 277         struct ORANGEFS_certificate certificate;        /* user certificate buffer */
 278 };
 279 #define extra_size_ORANGEFS_credential (ORANGEFS_REQ_LIMIT_GROUPS       *       \
 280                                     sizeof(__u32)               +       \
 281                                     ORANGEFS_REQ_LIMIT_ISSUER   +       \
 282                                     ORANGEFS_REQ_LIMIT_SIGNATURE        +       \
 283                                     extra_size_ORANGEFS_certificate)
 284
 285 /* This structure is used by the VFS-client interaction alone */
 286 struct ORANGEFS_keyval_pair {
 287         char key[ORANGEFS_MAX_XATTR_NAMELEN];
 288         __s32 key_sz;   /* __s32 for portable, fixed-size structures */
 289         __s32 val_sz;
 290         char val[ORANGEFS_MAX_XATTR_VALUELEN];
 291 };
 292
 293 /* pvfs2-sysint.h ***********************************************************/
 294 /* Describes attributes for a file, directory, or symlink. */
 295 struct ORANGEFS_sys_attr_s {
 296         __u32 owner;
 297         __u32 group;
 298         __u32 perms;
 299         __u64 atime;
 300         __u64 mtime;
 301         __u64 ctime;
 302         __s64 size;
 303
 304         /* NOTE: caller must free if valid */
 305         char *link_target;
 306
 307         /* Changed to __s32 so that size of structure does not change */
 308         __s32 dfile_count;
 309
 310         /* Changed to __s32 so that size of structure does not change */
 311         __s32 distr_dir_servers_initial;
 312
 313         /* Changed to __s32 so that size of structure does not change */
 314         __s32 distr_dir_servers_max;
 315
 316         /* Changed to __s32 so that size of structure does not change */
 317         __s32 distr_dir_split_size;
 318
 319         __u32 mirror_copies_count;
 320
 321         /* NOTE: caller must free if valid */
 322         char *dist_name;
 323
 324         /* NOTE: caller must free if valid */
 325         char *dist_params;
 326
 327         __s64 dirent_count;
 328         enum orangefs_ds_type objtype;
 329         __u64 flags;
 330         __u32 mask;
 331         __s64 blksize;
 332 };
 333
 334 #define ORANGEFS_LOOKUP_LINK_NO_FOLLOW 0
 335
 336 /* pint-dev.h ***************************************************************/
 337
 338 /* parameter structure used in ORANGEFS_DEV_DEBUG ioctl command */
 339 struct dev_mask_info_s {
 340         enum {
 341                 KERNEL_MASK,
 342                 CLIENT_MASK,
 343         } mask_type;
 344         __u64 mask_value;
 345 };
 346
 347 struct dev_mask2_info_s {
 348         __u64 mask1_value;
 349         __u64 mask2_value;
 350 };
 351
 352 /* pvfs2-util.h *************************************************************/
 353 __s32 ORANGEFS_util_translate_mode(int mode);
 354
 355 /* pvfs2-debug.h ************************************************************/
 356 #include "orangefs-debug.h"
 357
 358 /* pvfs2-internal.h *********************************************************/
 359 #define llu(x) (unsigned long long)(x)
 360 #define lld(x) (long long)(x)
 361
 362 /* pint-dev-shared.h ********************************************************/
 363 #define ORANGEFS_DEV_MAGIC 'k'
 364
 365 #define ORANGEFS_READDIR_DEFAULT_DESC_COUNT  5
 366
 367 #define DEV_GET_MAGIC           0x1
 368 #define DEV_GET_MAX_UPSIZE      0x2
 369 #define DEV_GET_MAX_DOWNSIZE    0x3
 370 #define DEV_MAP                 0x4
 371 #define DEV_REMOUNT_ALL         0x5
 372 #define DEV_DEBUG               0x6
 373 #define DEV_UPSTREAM            0x7
 374 #define DEV_CLIENT_MASK         0x8
 375 #define DEV_CLIENT_STRING       0x9
 376 #define DEV_MAX_NR              0xa
 377
 378 /* supported ioctls, codes are with respect to user-space */
 379 enum {
 380         ORANGEFS_DEV_GET_MAGIC = _IOW(ORANGEFS_DEV_MAGIC, DEV_GET_MAGIC, __s32),
 381         ORANGEFS_DEV_GET_MAX_UPSIZE =
 382             _IOW(ORANGEFS_DEV_MAGIC, DEV_GET_MAX_UPSIZE, __s32),
 383         ORANGEFS_DEV_GET_MAX_DOWNSIZE =
 384             _IOW(ORANGEFS_DEV_MAGIC, DEV_GET_MAX_DOWNSIZE, __s32),
 385         ORANGEFS_DEV_MAP = _IO(ORANGEFS_DEV_MAGIC, DEV_MAP),
 386         ORANGEFS_DEV_REMOUNT_ALL = _IO(ORANGEFS_DEV_MAGIC, DEV_REMOUNT_ALL),
 387         ORANGEFS_DEV_DEBUG = _IOR(ORANGEFS_DEV_MAGIC, DEV_DEBUG, __s32),
 388         ORANGEFS_DEV_UPSTREAM = _IOW(ORANGEFS_DEV_MAGIC, DEV_UPSTREAM, int),
 389         ORANGEFS_DEV_CLIENT_MASK = _IOW(ORANGEFS_DEV_MAGIC,
 390                                     DEV_CLIENT_MASK,
 391                                     struct dev_mask2_info_s),
 392         ORANGEFS_DEV_CLIENT_STRING = _IOW(ORANGEFS_DEV_MAGIC,
 393                                       DEV_CLIENT_STRING,
 394                                       char *),
 395         ORANGEFS_DEV_MAXNR = DEV_MAX_NR,
 396 };
 397
 398 /*
 399  * version number for use in communicating between kernel space and user
 400  * space. Zero signifies the upstream version of the kernel module.
 401  */
 402 #define ORANGEFS_KERNEL_PROTO_VERSION 0
 403 #define ORANGEFS_MINIMUM_USERSPACE_VERSION 20903
 404
 405 /*
 406  * describes memory regions to map in the ORANGEFS_DEV_MAP ioctl.
 407  * NOTE: See devorangefs-req.c for 32 bit compat structure.
 408  * Since this structure has a variable-sized layout that is different
 409  * on 32 and 64 bit platforms, we need to normalize to a 64 bit layout
 410  * on such systems before servicing ioctl calls from user-space binaries
 411  * that may be 32 bit!
 412  */
 413 struct ORANGEFS_dev_map_desc {
 414         void *ptr;
 415         __s32 total_size;
 416         __s32 size;
 417         __s32 count;
 418 };
 419
 420 /* gossip.h *****************************************************************/
 421
 422 #ifdef GOSSIP_DISABLE_DEBUG
 423 #define gossip_debug(mask, fmt, ...)                                    \
 424 do {                                                                    \
 425         if (0)                                                          \
 426                 printk(KERN_DEBUG fmt, ##__VA_ARGS__);                  \
 427 } while (0)
 428 #else
 429 extern __u64 gossip_debug_mask;
 430 extern struct client_debug_mask client_debug_mask;
 431
 432 /* try to avoid function call overhead by checking masks in macro */
 433 #define gossip_debug(mask, fmt, ...)                                    \
 434 do {                                                                    \
 435         if (gossip_debug_mask & (mask))                                 \
 436                 printk(KERN_DEBUG fmt, ##__VA_ARGS__);                  \
 437 } while (0)
 438 #endif /* GOSSIP_DISABLE_DEBUG */
 439
 440 /* do file and line number printouts w/ the GNU preprocessor */
 441 #define gossip_ldebug(mask, fmt, ...)                                   \
 442         gossip_debug(mask, "%s: " fmt, __func__, ##__VA_ARGS__)
 443
 444 #define gossip_err pr_err
 445 #define gossip_lerr(fmt, ...)                                           \
 446         gossip_err("%s line %d: " fmt,                                  \
 447                    __FILE__, __LINE__, ##__VA_ARGS__)