fs/orangefs/protocol.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #include <linux/kernel.h>
   3 #include <linux/types.h>
   4 #include <linux/spinlock_types.h>
   5 #include <linux/slab.h>
   6 #include <linux/ioctl.h>
   7
   8 /* khandle stuff  ***********************************************************/
   9
  10 /*
  11  * The 2.9 core will put 64 bit handles in here like this:
  12  *    1234 0000 0000 5678
  13  * The 3.0 and beyond cores will put 128 bit handles in here like this:
  14  *    1234 5678 90AB CDEF
  15  * The kernel module will always use the first four bytes and
  16  * the last four bytes as an inum.
  17  */
  18 struct orangefs_khandle {
  19         unsigned char u[16];
  20 }  __aligned(8);
  21
  22 /*
  23  * kernel version of an object ref.
  24  */
  25 struct orangefs_object_kref {
  26         struct orangefs_khandle khandle;
  27         __s32 fs_id;
  28         __s32 __pad1;
  29 };
  30
  31 /*
  32  * compare 2 khandles assumes little endian thus from large address to
  33  * small address
  34  */
  35 static inline int ORANGEFS_khandle_cmp(const struct orangefs_khandle *kh1,
  36                                    const struct orangefs_khandle *kh2)
  37 {
  38         int i;
  39
  40         for (i = 15; i >= 0; i--) {
  41                 if (kh1->u[i] > kh2->u[i])
  42                         return 1;
  43                 if (kh1->u[i] < kh2->u[i])
  44                         return -1;
  45         }
  46
  47         return 0;
  48 }
  49
  50 static inline void ORANGEFS_khandle_to(const struct orangefs_khandle *kh,
  51                                    void *p, int size)
  52 {
  53
  54         memcpy(p, kh->u, 16);
  55         memset(p + 16, 0, size - 16);
  56
  57 }
  58
  59 static inline void ORANGEFS_khandle_from(struct orangefs_khandle *kh,
  60                                      void *p, int size)
  61 {
  62         memset(kh, 0, 16);
  63         memcpy(kh->u, p, 16);
  64
  65 }
  66
  67 /* pvfs2-types.h ************************************************************/
  68
  69 #define ORANGEFS_SUPER_MAGIC 0x20030528
  70
  71 /*
  72  * ORANGEFS error codes are a signed 32-bit integer. Error codes are negative, but
  73  * the sign is stripped before decoding.
  74  */
  75
  76 /* Bit 31 is not used since it is the sign. */
  77
  78 /*
  79  * Bit 30 specifies that this is a ORANGEFS error. A ORANGEFS error is either an
  80  * encoded errno value or a ORANGEFS protocol error.
  81  */
  82 #define ORANGEFS_ERROR_BIT (1 << 30)
  83
  84 /*
  85  * Bit 29 specifies that this is a ORANGEFS protocol error and not an encoded
  86  * errno value.
  87  */
  88 #define ORANGEFS_NON_ERRNO_ERROR_BIT (1 << 29)
  89
  90 /*
  91  * Bits 9, 8, and 7 specify the error class, which encodes the section of
  92  * server code the error originated in for logging purposes. It is not used
  93  * in the kernel except to be masked out.
  94  */
  95 #define ORANGEFS_ERROR_CLASS_BITS 0x380
  96
  97 /* Bits 6 - 0 are reserved for the actual error code. */
  98 #define ORANGEFS_ERROR_NUMBER_BITS 0x7f
  99
 100 /* Encoded errno values decoded by PINT_errno_mapping in orangefs-utils.c. */
 101
 102 /* Our own ORANGEFS protocol error codes. */
 103 #define ORANGEFS_ECANCEL    (1|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
 104 #define ORANGEFS_EDEVINIT   (2|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
 105 #define ORANGEFS_EDETAIL    (3|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
 106 #define ORANGEFS_EHOSTNTFD  (4|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
 107 #define ORANGEFS_EADDRNTFD  (5|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
 108 #define ORANGEFS_ENORECVR   (6|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
 109 #define ORANGEFS_ETRYAGAIN  (7|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
 110 #define ORANGEFS_ENOTPVFS   (8|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
 111 #define ORANGEFS_ESECURITY  (9|ORANGEFS_NON_ERRNO_ERROR_BIT|ORANGEFS_ERROR_BIT)
 112
 113 /* permission bits */
 114 #define ORANGEFS_O_EXECUTE (1 << 0)
 115 #define ORANGEFS_O_WRITE   (1 << 1)
 116 #define ORANGEFS_O_READ    (1 << 2)
 117 #define ORANGEFS_G_EXECUTE (1 << 3)
 118 #define ORANGEFS_G_WRITE   (1 << 4)
 119 #define ORANGEFS_G_READ    (1 << 5)
 120 #define ORANGEFS_U_EXECUTE (1 << 6)
 121 #define ORANGEFS_U_WRITE   (1 << 7)
 122 #define ORANGEFS_U_READ    (1 << 8)
 123 /* no ORANGEFS_U_VTX (sticky bit) */
 124 #define ORANGEFS_G_SGID    (1 << 10)
 125 #define ORANGEFS_U_SUID    (1 << 11)
 126
 127 #define ORANGEFS_ITERATE_START    2147483646
 128 #define ORANGEFS_ITERATE_END      2147483645
 129 #define ORANGEFS_IMMUTABLE_FL FS_IMMUTABLE_FL
 130 #define ORANGEFS_APPEND_FL    FS_APPEND_FL
 131 #define ORANGEFS_NOATIME_FL   FS_NOATIME_FL
 132 #define ORANGEFS_MIRROR_FL    0x01000000ULL
 133 #define ORANGEFS_FS_ID_NULL       ((__s32)0)
 134 #define ORANGEFS_ATTR_SYS_UID                   (1 << 0)
 135 #define ORANGEFS_ATTR_SYS_GID                   (1 << 1)
 136 #define ORANGEFS_ATTR_SYS_PERM                  (1 << 2)
 137 #define ORANGEFS_ATTR_SYS_ATIME                 (1 << 3)
 138 #define ORANGEFS_ATTR_SYS_CTIME                 (1 << 4)
 139 #define ORANGEFS_ATTR_SYS_MTIME                 (1 << 5)
 140 #define ORANGEFS_ATTR_SYS_TYPE                  (1 << 6)
 141 #define ORANGEFS_ATTR_SYS_ATIME_SET             (1 << 7)
 142 #define ORANGEFS_ATTR_SYS_MTIME_SET             (1 << 8)
 143 #define ORANGEFS_ATTR_SYS_SIZE                  (1 << 20)
 144 #define ORANGEFS_ATTR_SYS_LNK_TARGET            (1 << 24)
 145 #define ORANGEFS_ATTR_SYS_DFILE_COUNT           (1 << 25)
 146 #define ORANGEFS_ATTR_SYS_DIRENT_COUNT          (1 << 26)
 147 #define ORANGEFS_ATTR_SYS_BLKSIZE               (1 << 28)
 148 #define ORANGEFS_ATTR_SYS_MIRROR_COPIES_COUNT   (1 << 29)
 149 #define ORANGEFS_ATTR_SYS_COMMON_ALL    \
 150         (ORANGEFS_ATTR_SYS_UID  |       \
 151          ORANGEFS_ATTR_SYS_GID  |       \
 152          ORANGEFS_ATTR_SYS_PERM |       \
 153          ORANGEFS_ATTR_SYS_ATIME        |       \
 154          ORANGEFS_ATTR_SYS_CTIME        |       \
 155          ORANGEFS_ATTR_SYS_MTIME        |       \
 156          ORANGEFS_ATTR_SYS_TYPE)
 157
 158 #define ORANGEFS_ATTR_SYS_ALL_SETABLE           \
 159 (ORANGEFS_ATTR_SYS_COMMON_ALL-ORANGEFS_ATTR_SYS_TYPE)
 160
 161 #define ORANGEFS_ATTR_SYS_ALL_NOHINT                    \
 162         (ORANGEFS_ATTR_SYS_COMMON_ALL           |       \
 163          ORANGEFS_ATTR_SYS_SIZE                 |       \
 164          ORANGEFS_ATTR_SYS_LNK_TARGET           |       \
 165          ORANGEFS_ATTR_SYS_DFILE_COUNT          |       \
 166          ORANGEFS_ATTR_SYS_MIRROR_COPIES_COUNT  |       \
 167          ORANGEFS_ATTR_SYS_DIRENT_COUNT         |       \
 168          ORANGEFS_ATTR_SYS_BLKSIZE)
 169
 170 #define ORANGEFS_XATTR_REPLACE 0x2
 171 #define ORANGEFS_XATTR_CREATE  0x1
 172 #define ORANGEFS_MAX_SERVER_ADDR_LEN 256
 173 #define ORANGEFS_NAME_MAX                256
 174 /*
 175  * max extended attribute name len as imposed by the VFS and exploited for the
 176  * upcall request types.
 177  * NOTE: Please retain them as multiples of 8 even if you wish to change them
 178  * This is *NECESSARY* for supporting 32 bit user-space binaries on a 64-bit
 179  * kernel. Due to implementation within DBPF, this really needs to be
 180  * ORANGEFS_NAME_MAX, which it was the same value as, but no reason to let it
 181  * break if that changes in the future.
 182  */
 183 #define ORANGEFS_MAX_XATTR_NAMELEN   ORANGEFS_NAME_MAX  /* Not the same as
 184                                                  * XATTR_NAME_MAX defined
 185                                                  * by <linux/xattr.h>
 186                                                  */
 187 #define ORANGEFS_MAX_XATTR_VALUELEN  8192       /* Not the same as XATTR_SIZE_MAX
 188                                          * defined by <linux/xattr.h>
 189                                          */
 190 #define ORANGEFS_MAX_XATTR_LISTLEN   16 /* Not the same as XATTR_LIST_MAX
 191                                          * defined by <linux/xattr.h>
 192                                          */
 193 /*
 194  * ORANGEFS I/O operation types, used in both system and server interfaces.
 195  */
 196 enum ORANGEFS_io_type {
 197         ORANGEFS_IO_READ = 1,
 198         ORANGEFS_IO_WRITE = 2
 199 };
 200
 201 /*
 202  * If this enum is modified the server parameters related to the precreate pool
 203  * batch and low threshold sizes may need to be modified  to reflect this
 204  * change.
 205  */
 206 enum orangefs_ds_type {
 207         ORANGEFS_TYPE_NONE = 0,
 208         ORANGEFS_TYPE_METAFILE = (1 << 0),
 209         ORANGEFS_TYPE_DATAFILE = (1 << 1),
 210         ORANGEFS_TYPE_DIRECTORY = (1 << 2),
 211         ORANGEFS_TYPE_SYMLINK = (1 << 3),
 212         ORANGEFS_TYPE_DIRDATA = (1 << 4),
 213         ORANGEFS_TYPE_INTERNAL = (1 << 5)       /* for the server's private use */
 214 };
 215
 216 /* This structure is used by the VFS-client interaction alone */
 217 struct ORANGEFS_keyval_pair {
 218         char key[ORANGEFS_MAX_XATTR_NAMELEN];
 219         __s32 key_sz;   /* __s32 for portable, fixed-size structures */
 220         __s32 val_sz;
 221         char val[ORANGEFS_MAX_XATTR_VALUELEN];
 222 };
 223
 224 /* pvfs2-sysint.h ***********************************************************/
 225 /* Describes attributes for a file, directory, or symlink. */
 226 struct ORANGEFS_sys_attr_s {
 227         __u32 owner;
 228         __u32 group;
 229         __u32 perms;
 230         __u64 atime;
 231         __u64 mtime;
 232         __u64 ctime;
 233         __s64 size;
 234
 235         /* NOTE: caller must free if valid */
 236         char *link_target;
 237
 238         /* Changed to __s32 so that size of structure does not change */
 239         __s32 dfile_count;
 240
 241         /* Changed to __s32 so that size of structure does not change */
 242         __s32 distr_dir_servers_initial;
 243
 244         /* Changed to __s32 so that size of structure does not change */
 245         __s32 distr_dir_servers_max;
 246
 247         /* Changed to __s32 so that size of structure does not change */
 248         __s32 distr_dir_split_size;
 249
 250         __u32 mirror_copies_count;
 251
 252         /* NOTE: caller must free if valid */
 253         char *dist_name;
 254
 255         /* NOTE: caller must free if valid */
 256         char *dist_params;
 257
 258         __s64 dirent_count;
 259         enum orangefs_ds_type objtype;
 260         __u64 flags;
 261         __u32 mask;
 262         __s64 blksize;
 263 };
 264
 265 #define ORANGEFS_LOOKUP_LINK_NO_FOLLOW 0
 266
 267 /* pint-dev.h ***************************************************************/
 268
 269 /* parameter structure used in ORANGEFS_DEV_DEBUG ioctl command */
 270 struct dev_mask_info_s {
 271         enum {
 272                 KERNEL_MASK,
 273                 CLIENT_MASK,
 274         } mask_type;
 275         __u64 mask_value;
 276 };
 277
 278 struct dev_mask2_info_s {
 279         __u64 mask1_value;
 280         __u64 mask2_value;
 281 };
 282
 283 /* pvfs2-util.h *************************************************************/
 284 __s32 ORANGEFS_util_translate_mode(int mode);
 285
 286 /* pvfs2-debug.h ************************************************************/
 287 #include "orangefs-debug.h"
 288
 289 /* pvfs2-internal.h *********************************************************/
 290 #define llu(x) (unsigned long long)(x)
 291 #define lld(x) (long long)(x)
 292
 293 /* pint-dev-shared.h ********************************************************/
 294 #define ORANGEFS_DEV_MAGIC 'k'
 295
 296 #define ORANGEFS_READDIR_DEFAULT_DESC_COUNT  5
 297
 298 #define DEV_GET_MAGIC           0x1
 299 #define DEV_GET_MAX_UPSIZE      0x2
 300 #define DEV_GET_MAX_DOWNSIZE    0x3
 301 #define DEV_MAP                 0x4
 302 #define DEV_REMOUNT_ALL         0x5
 303 #define DEV_DEBUG               0x6
 304 #define DEV_UPSTREAM            0x7
 305 #define DEV_CLIENT_MASK         0x8
 306 #define DEV_CLIENT_STRING       0x9
 307 #define DEV_MAX_NR              0xa
 308
 309 /* supported ioctls, codes are with respect to user-space */
 310 enum {
 311         ORANGEFS_DEV_GET_MAGIC = _IOW(ORANGEFS_DEV_MAGIC, DEV_GET_MAGIC, __s32),
 312         ORANGEFS_DEV_GET_MAX_UPSIZE =
 313             _IOW(ORANGEFS_DEV_MAGIC, DEV_GET_MAX_UPSIZE, __s32),
 314         ORANGEFS_DEV_GET_MAX_DOWNSIZE =
 315             _IOW(ORANGEFS_DEV_MAGIC, DEV_GET_MAX_DOWNSIZE, __s32),
 316         ORANGEFS_DEV_MAP = _IO(ORANGEFS_DEV_MAGIC, DEV_MAP),
 317         ORANGEFS_DEV_REMOUNT_ALL = _IO(ORANGEFS_DEV_MAGIC, DEV_REMOUNT_ALL),
 318         ORANGEFS_DEV_DEBUG = _IOR(ORANGEFS_DEV_MAGIC, DEV_DEBUG, __s32),
 319         ORANGEFS_DEV_UPSTREAM = _IOW(ORANGEFS_DEV_MAGIC, DEV_UPSTREAM, int),
 320         ORANGEFS_DEV_CLIENT_MASK = _IOW(ORANGEFS_DEV_MAGIC,
 321                                     DEV_CLIENT_MASK,
 322                                     struct dev_mask2_info_s),
 323         ORANGEFS_DEV_CLIENT_STRING = _IOW(ORANGEFS_DEV_MAGIC,
 324                                       DEV_CLIENT_STRING,
 325                                       char *),
 326         ORANGEFS_DEV_MAXNR = DEV_MAX_NR,
 327 };
 328
 329 /*
 330  * version number for use in communicating between kernel space and user
 331  * space. Zero signifies the upstream version of the kernel module.
 332  */
 333 #define ORANGEFS_KERNEL_PROTO_VERSION 0
 334 #define ORANGEFS_MINIMUM_USERSPACE_VERSION 20903
 335
 336 /*
 337  * describes memory regions to map in the ORANGEFS_DEV_MAP ioctl.
 338  * NOTE: See devorangefs-req.c for 32 bit compat structure.
 339  * Since this structure has a variable-sized layout that is different
 340  * on 32 and 64 bit platforms, we need to normalize to a 64 bit layout
 341  * on such systems before servicing ioctl calls from user-space binaries
 342  * that may be 32 bit!
 343  */
 344 struct ORANGEFS_dev_map_desc {
 345         void __user *ptr;
 346         __s32 total_size;
 347         __s32 size;
 348         __s32 count;
 349 };
 350
 351 /* gossip.h *****************************************************************/
 352
 353 extern __u64 orangefs_gossip_debug_mask;
 354
 355 /* try to avoid function call overhead by checking masks in macro */
 356 #define gossip_debug(mask, fmt, ...)                                    \
 357 do {                                                                    \
 358         if (orangefs_gossip_debug_mask & (mask))                        \
 359                 printk(KERN_DEBUG fmt, ##__VA_ARGS__);                  \
 360 } while (0)
 361
 362 #define gossip_err pr_err