lnet/include/libcfs/libcfs.h

   1 /* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
   2  * vim:expandtab:shiftwidth=8:tabstop=8:
   3  */
   4 #ifndef __LIBCFS_LIBCFS_H__
   5 #define __LIBCFS_LIBCFS_H__
   6
   7 #if !__GNUC__
   8 #define __attribute__(x)
   9 #endif
  10
  11 #if defined(__linux__)
  12 #include <libcfs/linux/libcfs.h>
  13 #elif defined(__APPLE__)
  14 #include <libcfs/darwin/libcfs.h>
  15 #else
  16 #error Unsupported operating system.
  17 #endif
  18
  19 #include "curproc.h"
  20
  21 #define PORTAL_DEBUG
  22
  23 #ifndef offsetof
  24 # define offsetof(typ,memb)     ((unsigned long)((char *)&(((typ *)0)->memb)))
  25 #endif
  26
  27 #define LOWEST_BIT_SET(x)       ((x) & ~((x) - 1))
  28
  29 /*
  30  *  Debugging
  31  */
  32 extern unsigned int portal_subsystem_debug;
  33 extern unsigned int portal_stack;
  34 extern unsigned int portal_debug;
  35 extern unsigned int portal_printk;
  36
  37 /*
  38  * struct ptldebug_header is defined in libcfs/<os>/libcfs.h
  39  */
  40
  41 #define PH_FLAG_FIRST_RECORD 1
  42
  43 /* Debugging subsystems (32 bits, non-overlapping) */
  44 #define S_UNDEFINED   0x00000001
  45 #define S_MDC         0x00000002
  46 #define S_MDS         0x00000004
  47 #define S_OSC         0x00000008
  48 #define S_OST         0x00000010
  49 #define S_CLASS       0x00000020
  50 #define S_LOG         0x00000040
  51 #define S_LLITE       0x00000080
  52 #define S_RPC         0x00000100
  53 #define S_MGMT        0x00000200
  54 #define S_PORTALS     0x00000400
  55 #define S_NAL         0x00000800 /* ALL NALs */
  56 #define S_PINGER      0x00001000
  57 #define S_FILTER      0x00002000
  58 #define S_PTLBD       0x00004000
  59 #define S_ECHO        0x00008000
  60 #define S_LDLM        0x00010000
  61 #define S_LOV         0x00020000
  62 #define S_PTLROUTER   0x00040000
  63 #define S_COBD        0x00080000
  64 #define S_SM          0x00100000
  65 #define S_ASOBD       0x00200000
  66 #define S_CONFOBD     0x00400000
  67 #define S_LMV         0x00800000
  68 #define S_CMOBD       0x01000000
  69 #define S_SEC         0x02000000
  70 /* If you change these values, please keep these files up to date...
  71  *    portals/utils/debug.c
  72  *    utils/lconf
  73  */
  74
  75 /* Debugging masks (32 bits, non-overlapping) */
  76 #define D_TRACE       0x00000001 /* ENTRY/EXIT markers */
  77 #define D_INODE       0x00000002
  78 #define D_SUPER       0x00000004
  79 #define D_EXT2        0x00000008 /* anything from ext2_debug */
  80 #define D_MALLOC      0x00000010 /* print malloc, free information */
  81 #define D_CACHE       0x00000020 /* cache-related items */
  82 #define D_INFO        0x00000040 /* general information */
  83 #define D_IOCTL       0x00000080 /* ioctl related information */
  84 #define D_BLOCKS      0x00000100 /* ext2 block allocation */
  85 #define D_NET         0x00000200 /* network communications */
  86 #define D_WARNING     0x00000400 /* CWARN(...) == CDEBUG (D_WARNING, ...) */
  87 #define D_BUFFS       0x00000800
  88 #define D_OTHER       0x00001000
  89 #define D_DENTRY      0x00002000
  90 #define D_PORTALS     0x00004000 /* ENTRY/EXIT markers */
  91 #define D_PAGE        0x00008000 /* bulk page handling */
  92 #define D_DLMTRACE    0x00010000
  93 #define D_ERROR       0x00020000 /* CERROR(...) == CDEBUG (D_ERROR, ...) */
  94 #define D_EMERG       0x00040000 /* CEMERG(...) == CDEBUG (D_EMERG, ...) */
  95 #define D_HA          0x00080000 /* recovery and failover */
  96 #define D_RPCTRACE    0x00100000 /* for distributed debugging */
  97 #define D_VFSTRACE    0x00200000
  98 #define D_READA       0x00400000 /* read-ahead */
  99 #define D_MMAP        0x00800000
 100 #define D_CONFIG      0x01000000
 101 #define D_CONSOLE     0x02000000
 102 #define D_QUOTA       0x04000000
 103 #define D_SEC         0x08000000
 104 /* If you change these values, please keep these files up to date...
 105  *    portals/utils/debug.c
 106  *    utils/lconf
 107  */
 108
 109 #ifndef DEBUG_SUBSYSTEM
 110 # define DEBUG_SUBSYSTEM S_UNDEFINED
 111 #endif
 112
 113 #ifdef __KERNEL__
 114 #if 1
 115 #define CDEBUG(mask, format, a...)                                            \
 116 do {                                                                          \
 117         CHECK_STACK(CDEBUG_STACK);                                            \
 118         if (((mask) & (D_ERROR | D_EMERG | D_WARNING | D_CONSOLE)) ||         \
 119             (portal_debug & (mask) &&                                         \
 120              portal_subsystem_debug & DEBUG_SUBSYSTEM))                       \
 121                 portals_debug_msg(DEBUG_SUBSYSTEM, mask,                      \
 122                                   __FILE__, __FUNCTION__, __LINE__,           \
 123                                   CDEBUG_STACK, format, ## a);                \
 124 } while (0)
 125
 126 #define CDEBUG_MAX_LIMIT 600
 127 #define CDEBUG_LIMIT(cdebug_mask, cdebug_format, a...)                        \
 128 do {                                                                          \
 129         static cfs_time_t cdebug_next = 0;                                    \
 130         static int cdebug_count = 0;                                          \
 131         static cfs_duration_t cdebug_delay = CFS_MIN_DELAY;                   \
 132                                                                               \
 133         CHECK_STACK(CDEBUG_STACK);                                            \
 134         if (cfs_time_after(cfs_time_current(), cdebug_next)) {                \
 135                 portals_debug_msg(DEBUG_SUBSYSTEM, cdebug_mask, __FILE__,     \
 136                                   __FUNCTION__, __LINE__, CDEBUG_STACK,       \
 137                                   cdebug_format, ## a);                       \
 138                 if (cdebug_count) {                                           \
 139                         portals_debug_msg(DEBUG_SUBSYSTEM, cdebug_mask,       \
 140                                           __FILE__, __FUNCTION__, __LINE__,   \
 141                                           0, "skipped %d similar messages\n", \
 142                                           cdebug_count);                      \
 143                         cdebug_count = 0;                                     \
 144                 }                                                             \
 145                 if (cfs_time_after(cfs_time_current(),                        \
 146                                    cdebug_next +                              \
 147                                    cfs_time_seconds(CDEBUG_MAX_LIMIT+10)))    \
 148                         cdebug_delay = cdebug_delay > (8 * CFS_MIN_DELAY)?    \
 149                                        cdebug_delay/8 : CFS_MIN_DELAY;        \
 150                 else                                                          \
 151                         cdebug_delay = cdebug_delay*2 >= cfs_time_seconds(CDEBUG_MAX_LIMIT)?\
 152                                        cfs_time_seconds(CDEBUG_MAX_LIMIT) :   \
 153                                        cdebug_delay*2;                        \
 154                 cdebug_next = cfs_time_current() + cdebug_delay;              \
 155         } else {                                                              \
 156                 portals_debug_msg(DEBUG_SUBSYSTEM,                            \
 157                                   portal_debug & ~(D_EMERG|D_ERROR|D_WARNING),\
 158                                   __FILE__, __FUNCTION__, __LINE__,           \
 159                                   CDEBUG_STACK, cdebug_format, ## a);         \
 160                 cdebug_count++;                                               \
 161         }                                                                     \
 162 } while (0)
 163
 164 #define CWARN(format, a...) CDEBUG_LIMIT(D_WARNING, format, ## a)
 165 #define CERROR(format, a...) CDEBUG_LIMIT(D_ERROR, format, ## a)
 166 #define CEMERG(format, a...) CDEBUG(D_EMERG, format, ## a)
 167
 168 #define LCONSOLE(mask, format, a...) CDEBUG(D_CONSOLE | (mask), format, ## a)
 169 #define LCONSOLE_INFO(format, a...)  CDEBUG_LIMIT(D_CONSOLE, format, ## a)
 170 #define LCONSOLE_WARN(format, a...)  CDEBUG_LIMIT(D_CONSOLE | D_WARNING, format, ## a)
 171 #define LCONSOLE_ERROR(format, a...) CDEBUG_LIMIT(D_CONSOLE | D_ERROR, format, ## a)
 172 #define LCONSOLE_EMERG(format, a...) CDEBUG(D_CONSOLE | D_EMERG, format, ## a)
 173
 174 #define GOTO(label, rc)                                                 \
 175 do {                                                                    \
 176         long GOTO__ret = (long)(rc);                                    \
 177         CDEBUG(D_TRACE,"Process leaving via %s (rc=%lu : %ld : %lx)\n", \
 178                #label, (unsigned long)GOTO__ret, (signed long)GOTO__ret,\
 179                (signed long)GOTO__ret);                                 \
 180         goto label;                                                     \
 181 } while (0)
 182
 183 #define CDEBUG_ENTRY_EXIT (0)
 184
 185 #ifdef CDEBUG_ENTRY_EXIT
 186
 187 /*
 188  * if rc == NULL, we need to code as RETURN((void *)NULL), otherwise
 189  * there will be a warning in osx.
 190  */
 191 #define RETURN(rc)                                                      \
 192 do {                                                                    \
 193         typeof(rc) RETURN__ret = (rc);                                  \
 194         CDEBUG(D_TRACE, "Process leaving (rc=%lu : %ld : %lx)\n",       \
 195                (long)RETURN__ret, (long)RETURN__ret, (long)RETURN__ret);\
 196         EXIT_NESTING;                                                   \
 197         return RETURN__ret;                                             \
 198 } while (0)
 199
 200 #define ENTRY                                                           \
 201 ENTRY_NESTING;                                                          \
 202 do {                                                                    \
 203         CDEBUG(D_TRACE, "Process entered\n");                           \
 204 } while (0)
 205
 206 #define EXIT                                                            \
 207 do {                                                                    \
 208         CDEBUG(D_TRACE, "Process leaving\n");                           \
 209         EXIT_NESTING;                                                   \
 210 } while(0)
 211 #else /* !1 */
 212
 213 #define RETURN(rc) return (rc)
 214 #define ENTRY
 215 #define EXIT
 216
 217 #endif
 218
 219 #else
 220 #define CDEBUG(mask, format, a...)      do { } while (0)
 221 #define CWARN(format, a...)             printk(KERN_WARNING format, ## a)
 222 #define CERROR(format, a...)            printk(KERN_ERR format, ## a)
 223 #define CEMERG(format, a...)            printk(KERN_EMERG format, ## a)
 224 #define LCONSOLE(mask, format, a...)    do { } while (0)
 225 #define LCONSOLE_INFO(format, a...)     printk(KERN_INFO format, ## a)
 226 #define LCONSOLE_WARN(format, a...)     printk(KERN_WARNING format, ## a)
 227 #define LCONSOLE_ERROR(format, a...)    printk(KERN_ERROR format, ## a)
 228 #define LCONSOLE_EMERG(format, a...)    printk(KERN_EMERG format, ## a)
 229 #define GOTO(label, rc)                 do { (void)(rc); goto label; } while (0)
 230 #define RETURN(rc)                      return (rc)
 231 #define ENTRY                           do { } while (0)
 232 #define EXIT                            do { } while (0)
 233 #endif /* !1 */
 234 #else /* !__KERNEL__ */
 235 #define CDEBUG(mask, format, a...)      do { } while (0)
 236 #define LCONSOLE(mask, format, a...)    do { } while (0)
 237 #ifdef stderr
 238 #define CWARN(format, a...)             fprintf(stderr, "<4>" format, ## a)
 239 #define CERROR(format, a...)            fprintf(stderr, "<3>" format, ## a)
 240 #define CEMERG(format, a...)            fprintf(stderr, "<0>" format, ## a)
 241 #define LCONSOLE_INFO(format, a...)     fprintf(stderr, format, ## a)
 242 #define LCONSOLE_WARN(format, a...)     fprintf(stderr, format, ## a)
 243 #define LCONSOLE_ERROR(format, a...)    fprintf(stderr, format, ## a)
 244 #define LCONSOLE_EMERG(format, a...)    fprintf(stderr, format, ## a)
 245 #else
 246 #define CWARN(format, a...)             do { } while (0)
 247 #define CERROR(format, a...)            do { } while (0)
 248 #define CEMERG(format, a...)            do { } while (0)
 249 #define LCONSOLE_INFO(format, a...)     do { } while (0)
 250 #define LCONSOLE_WARN(format, a...)     do { } while (0)
 251 #define LCONSOLE_ERROR(format, a...)    do { } while (0)
 252 #define LCONSOLE_EMERG(format, a...)    do { } while (0)
 253 #endif /* !stderr */
 254 #define GOTO(label, rc)                 do { (void)(rc); goto label; } while (0)
 255 #define RETURN(rc)                      return (rc)
 256 #define ENTRY                           do { } while (0)
 257 #define EXIT                            do { } while (0)
 258 #endif /* !__KERNEL__ */
 259
 260 #define LUSTRE_SRV_PTL_PID      LUSTRE_PTL_PID
 261
 262 /*
 263  * eeb cfg
 264  * ecf6
 265  * ecfG
 266  */
 267 #define PORTALS_CFG_VERSION 0xecf60001
 268
 269 struct portals_cfg {
 270         __u32 pcfg_version;
 271         __u32 pcfg_command;
 272
 273         __u32 pcfg_nal;
 274         __u32 pcfg_flags;
 275
 276         __u32 pcfg_gw_nal;
 277         __u32 pcfg_padding1;
 278
 279         __u64 pcfg_nid;
 280         __u64 pcfg_nid2;
 281         __u64 pcfg_nid3;
 282         __u32 pcfg_id;
 283         __u32 pcfg_misc;
 284         __u32 pcfg_fd;
 285         __u32 pcfg_count;
 286         __u32 pcfg_size;
 287         __u32 pcfg_wait;
 288
 289         __u32 pcfg_plen1; /* buffers in userspace */
 290         __u32 pcfg_plen2; /* buffers in userspace */
 291         __u32 pcfg_alloc_size;  /* size of this allocated portals_cfg */
 292         char  pcfg_pbuf[0];
 293 };
 294
 295 #define PCFG_INIT(pcfg, cmd)                            \
 296 do {                                                    \
 297         memset(&(pcfg), 0, sizeof((pcfg)));             \
 298         (pcfg).pcfg_version = PORTALS_CFG_VERSION;      \
 299         (pcfg).pcfg_command = (cmd);                    \
 300                                                         \
 301 } while (0)
 302
 303 #define PCFG_INIT_PBUF(pcfg, cmd, plen1, plen2)                         \
 304         do {                                                            \
 305                 int bufsize = size_round(sizeof(*(pcfg)));              \
 306                 bufsize += size_round(plen1) + size_round(plen2);       \
 307                 PORTAL_ALLOC((pcfg), bufsize);                          \
 308                 if ((pcfg)) {                                           \
 309                         memset((pcfg), 0, bufsize);                     \
 310                         (pcfg)->pcfg_version = PORTALS_CFG_VERSION;     \
 311                         (pcfg)->pcfg_command = (cmd);                   \
 312                         (pcfg)->pcfg_plen1 = (plen1);                   \
 313                         (pcfg)->pcfg_plen2 = (plen2);                   \
 314                         (pcfg)->pcfg_alloc_size = bufsize;              \
 315                 }                                                       \
 316         } while (0)
 317
 318 #define PCFG_FREE_PBUF(pcfg) PORTAL_FREE((pcfg), (pcfg)->pcfg_alloc_size)
 319
 320 #define PCFG_PBUF(pcfg, idx)                                            \
 321         (0 == (idx)                                                     \
 322          ? ((char *)(pcfg) + size_round(sizeof(*(pcfg))))               \
 323          : (1 == (idx)                                                  \
 324             ? ((char *)(pcfg) + size_round(sizeof(*(pcfg))) + size_round(pcfg->pcfg_plen1)) \
 325             : (NULL)))
 326
 327 typedef int (nal_cmd_handler_fn)(struct portals_cfg *, void *);
 328 int libcfs_nal_cmd_register(int nal, nal_cmd_handler_fn *handler, void *arg);
 329 int libcfs_nal_cmd(struct portals_cfg *pcfg);
 330 void libcfs_nal_cmd_unregister(int nal);
 331
 332 struct portal_ioctl_data {
 333         __u32 ioc_len;
 334         __u32 ioc_version;
 335         __u64 ioc_nid;
 336         __u64 ioc_nid2;
 337         __u64 ioc_nid3;
 338         __u32 ioc_count;
 339         __u32 ioc_nal;
 340         __u32 ioc_nal_cmd;
 341         __u32 ioc_fd;
 342         __u32 ioc_id;
 343
 344         __u32 ioc_flags;
 345         __u32 ioc_size;
 346
 347         __u32 ioc_wait;
 348         __u32 ioc_timeout;
 349         __u32 ioc_misc;
 350
 351         __u32 ioc_inllen1;
 352         char *ioc_inlbuf1;
 353         __u32 ioc_inllen2;
 354         char *ioc_inlbuf2;
 355
 356         __u32 ioc_plen1; /* buffers in userspace */
 357         char *ioc_pbuf1;
 358         __u32 ioc_plen2; /* buffers in userspace */
 359         char *ioc_pbuf2;
 360
 361         char ioc_bulk[0];
 362 };
 363
 364
 365 #ifdef __KERNEL__
 366
 367 #include <libcfs/list.h>
 368
 369 struct libcfs_ioctl_handler {
 370         struct list_head item;
 371         int (*handle_ioctl)(struct portal_ioctl_data *data,
 372                             unsigned int cmd, unsigned long args);
 373 };
 374
 375 #define DECLARE_IOCTL_HANDLER(ident, func)              \
 376         struct libcfs_ioctl_handler ident = {           \
 377                 .item = CFS_LIST_HEAD_INIT(ident.item),     \
 378                 .handle_ioctl = func                    \
 379         }
 380
 381 int libcfs_register_ioctl(struct libcfs_ioctl_handler *hand);
 382 int libcfs_deregister_ioctl(struct libcfs_ioctl_handler *hand);
 383
 384 /* libcfs watchdogs */
 385 struct lc_watchdog;
 386
 387 /* Just use the default handler (dumplog)  */
 388 #define LC_WATCHDOG_DEFAULT_CB NULL
 389
 390 /* Add a watchdog which fires after "time" milliseconds of delay.  You have to
 391  * touch it once to enable it. */
 392 struct lc_watchdog *lc_watchdog_add(int time,
 393                                     void (*cb)(struct lc_watchdog *,
 394                                                struct task_struct *,
 395                                                void *),
 396                                     void *data);
 397
 398 /* Enables a watchdog and resets its timer. */
 399 void lc_watchdog_touch(struct lc_watchdog *lcw);
 400
 401 /* Disable a watchdog; touch it to restart it. */
 402 void lc_watchdog_disable(struct lc_watchdog *lcw);
 403
 404 /* Clean up the watchdog */
 405 void lc_watchdog_delete(struct lc_watchdog *lcw);
 406
 407 /* Dump a debug log */
 408 void lc_watchdog_dumplog(struct lc_watchdog *lcw,
 409                          struct task_struct *tsk,
 410                          void *data);
 411
 412 /* __KERNEL__ */
 413 #endif
 414
 415 /*
 416  * libcfs pseudo device operations
 417  *
 418  * struct cfs_psdev_t and
 419  * cfs_psdev_register() and
 420  * cfs_psdev_deregister() are declared in
 421  * libcfs/<os>/cfs_prim.h
 422  *
 423  * It's just draft now.
 424  */
 425
 426 struct cfs_psdev_file {
 427         unsigned long   off;
 428         void            *private_data;
 429         unsigned long   reserved1;
 430         unsigned long   reserved2;
 431 };
 432
 433 struct cfs_psdev_ops {
 434         int (*p_open)(unsigned long, void *);
 435         int (*p_close)(unsigned long, void *);
 436         int (*p_read)(struct cfs_psdev_file *, char *, unsigned long);
 437         int (*p_write)(struct cfs_psdev_file *, char *, unsigned long);
 438         int (*p_ioctl)(struct cfs_psdev_file *, unsigned long, void *);
 439 };
 440
 441 /*
 442  * generic time manipulation functions.
 443  */
 444
 445 static inline int cfs_time_after(cfs_time_t t1, cfs_time_t t2)
 446 {
 447         return cfs_time_before(t2, t1);
 448 }
 449
 450 static inline int cfs_time_aftereq(cfs_time_t t1, cfs_time_t t2)
 451 {
 452         return cfs_time_beforeq(t2, t1);
 453 }
 454
 455 /*
 456  * return seconds since UNIX epoch
 457  */
 458 static inline time_t cfs_unix_seconds(void)
 459 {
 460         cfs_fs_time_t t;
 461
 462         cfs_fs_time_current(&t);
 463         return cfs_fs_time_sec(&t);
 464 }
 465
 466 #define CFS_RATELIMIT(seconds)                                  \
 467 ({                                                              \
 468         /*                                                      \
 469          * XXX nikita: non-portable initializer                 \
 470          */                                                     \
 471         static time_t __next_message = 0;                       \
 472         int result;                                             \
 473                                                                 \
 474         if (cfs_time_after(cfs_time_current(), __next_message)) \
 475                 result = 1;                                     \
 476         else {                                                  \
 477                 __next_message = cfs_time_shift(seconds);       \
 478                 result = 0;                                     \
 479         }                                                       \
 480         result;                                                 \
 481 })
 482
 483 extern void portals_debug_msg(int subsys, int mask, char *file, const char *fn,
 484                               const int line, unsigned long stack,
 485                               char *format, ...)
 486             __attribute__ ((format (printf, 7, 8)));
 487
 488 static inline void cfs_slow_warning(cfs_time_t now, int seconds, char *msg)
 489 {
 490         if (cfs_time_after(cfs_time_current(),
 491                            cfs_time_add(now, cfs_time_seconds(15))))
 492                 CERROR("slow %s %lu sec\n", msg,
 493                        cfs_duration_sec(cfs_time_sub(cfs_time_current(), now)));
 494 }
 495
 496 /*
 497  * helper function similar to do_gettimeofday() of Linux kernel
 498  */
 499 static inline void cfs_fs_timeval(struct timeval *tv)
 500 {
 501         cfs_fs_time_t time;
 502
 503         cfs_fs_time_current(&time);
 504         cfs_fs_time_usec(&time, tv);
 505 }
 506
 507 /*
 508  * return valid time-out based on user supplied one. Currently we only check
 509  * that time-out is not shorted than allowed.
 510  */
 511 static inline cfs_duration_t cfs_timeout_cap(cfs_duration_t timeout)
 512 {
 513         if (timeout < cfs_time_minimal_timeout())
 514                 timeout = cfs_time_minimal_timeout();
 515         return timeout;
 516 }
 517
 518 /*
 519  * Portable memory allocator API (draft)
 520  */
 521 enum cfs_alloc_flags {
 522         /* allocation is not allowed to block */
 523         CFS_ALLOC_ATOMIC = (1 << 0),
 524         /* allocation is allowed to block */
 525         CFS_ALLOC_WAIT = (1 << 1),
 526         /* allocation should return zeroed memory */
 527         CFS_ALLOC_ZERO   = (1 << 2),
 528         /* allocation is allowed to call file-system code to free/clean
 529          * memory */
 530         CFS_ALLOC_FS     = (1 << 3),
 531         /* allocation is allowed to do io to free/clean memory */
 532         CFS_ALLOC_IO     = (1 << 4),
 533         /* standard allocator flag combination */
 534         CFS_ALLOC_STD    = CFS_ALLOC_FS | CFS_ALLOC_IO,
 535         CFS_ALLOC_USER   = CFS_ALLOC_WAIT | CFS_ALLOC_FS | CFS_ALLOC_IO,
 536 };
 537
 538 #define CFS_SLAB_ATOMIC         CFS_ALLOC_ATOMIC
 539 #define CFS_SLAB_WAIT           CFS_ALLOC_WAIT
 540 #define CFS_SLAB_ZERO           CFS_ALLOC_ZERO
 541 #define CFS_SLAB_FS             CFS_ALLOC_FS
 542 #define CFS_SLAB_IO             CFS_ALLOC_IO
 543 #define CFS_SLAB_STD            CFS_ALLOC_STD
 544 #define CFS_SLAB_USER           CFS_ALLOC_USER
 545
 546 /* flags for cfs_page_alloc() in addition to enum cfs_alloc_flags */
 547 enum cfs_page_alloc_flags {
 548         /* allow to return page beyond KVM. It has to be mapped into KVM by
 549          * cfs_page_map(); */
 550         CFS_ALLOC_HIGH   = (1 << 5),
 551         CFS_ALLOC_HIGHUSER = CFS_ALLOC_WAIT | CFS_ALLOC_FS | CFS_ALLOC_IO | CFS_ALLOC_HIGH,
 552 };
 553
 554
 555 #define _LIBCFS_H
 556
 557 #endif /* _LIBCFS_H */