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