fs/orangefs/orangefs-kernel.h

   1 /*
   2  * (C) 2001 Clemson University and The University of Chicago
   3  *
   4  * See COPYING in top-level directory.
   5  */
   6
   7 /*
   8  *  The ORANGEFS Linux kernel support allows ORANGEFS volumes to be mounted and
   9  *  accessed through the Linux VFS (i.e. using standard I/O system calls).
  10  *  This support is only needed on clients that wish to mount the file system.
  11  *
  12  */
  13
  14 /*
  15  *  Declarations and macros for the ORANGEFS Linux kernel support.
  16  */
  17
  18 #ifndef __ORANGEFSKERNEL_H
  19 #define __ORANGEFSKERNEL_H
  20
  21 #include <linux/kernel.h>
  22 #include <linux/moduleparam.h>
  23 #include <linux/statfs.h>
  24 #include <linux/backing-dev.h>
  25 #include <linux/device.h>
  26 #include <linux/mpage.h>
  27 #include <linux/namei.h>
  28 #include <linux/errno.h>
  29 #include <linux/init.h>
  30 #include <linux/module.h>
  31 #include <linux/slab.h>
  32 #include <linux/types.h>
  33 #include <linux/fs.h>
  34 #include <linux/vmalloc.h>
  35
  36 #include <linux/aio.h>
  37 #include <linux/posix_acl.h>
  38 #include <linux/posix_acl_xattr.h>
  39 #include <linux/compat.h>
  40 #include <linux/mount.h>
  41 #include <linux/uaccess.h>
  42 #include <linux/atomic.h>
  43 #include <linux/uio.h>
  44 #include <linux/sched.h>
  45 #include <linux/mm.h>
  46 #include <linux/wait.h>
  47 #include <linux/dcache.h>
  48 #include <linux/pagemap.h>
  49 #include <linux/poll.h>
  50 #include <linux/rwsem.h>
  51 #include <linux/xattr.h>
  52 #include <linux/exportfs.h>
  53
  54 #include <asm/unaligned.h>
  55
  56 #include "orangefs-dev-proto.h"
  57
  58 #ifdef ORANGEFS_KERNEL_DEBUG
  59 #define ORANGEFS_DEFAULT_OP_TIMEOUT_SECS       10
  60 #else
  61 #define ORANGEFS_DEFAULT_OP_TIMEOUT_SECS       20
  62 #endif
  63
  64 #define ORANGEFS_BUFMAP_WAIT_TIMEOUT_SECS   30
  65
  66 #define ORANGEFS_DEFAULT_SLOT_TIMEOUT_SECS     900      /* 15 minutes */
  67
  68 #define ORANGEFS_REQDEVICE_NAME          "pvfs2-req"
  69
  70 #define ORANGEFS_DEVREQ_MAGIC             0x20030529
  71 #define ORANGEFS_LINK_MAX                 0x000000FF
  72 #define ORANGEFS_PURGE_RETRY_COUNT     0x00000005
  73 #define ORANGEFS_MAX_NUM_OPTIONS          0x00000004
  74 #define ORANGEFS_MAX_MOUNT_OPT_LEN        0x00000080
  75 #define ORANGEFS_MAX_FSKEY_LEN            64
  76
  77 #define MAX_DEV_REQ_UPSIZE (2 * sizeof(__s32) +   \
  78 sizeof(__u64) + sizeof(struct orangefs_upcall_s))
  79 #define MAX_DEV_REQ_DOWNSIZE (2 * sizeof(__s32) + \
  80 sizeof(__u64) + sizeof(struct orangefs_downcall_s))
  81
  82 /*
  83  * valid orangefs kernel operation states
  84  *
  85  * unknown  - op was just initialized
  86  * waiting  - op is on request_list (upward bound)
  87  * inprogr  - op is in progress (waiting for downcall)
  88  * serviced - op has matching downcall; ok
  89  * purged   - op has to start a timer since client-core
  90  *            exited uncleanly before servicing op
  91  * given up - submitter has given up waiting for it
  92  */
  93 enum orangefs_vfs_op_states {
  94         OP_VFS_STATE_UNKNOWN = 0,
  95         OP_VFS_STATE_WAITING = 1,
  96         OP_VFS_STATE_INPROGR = 2,
  97         OP_VFS_STATE_SERVICED = 4,
  98         OP_VFS_STATE_PURGED = 8,
  99         OP_VFS_STATE_GIVEN_UP = 16,
 100 };
 101
 102 /*
 103  * An array of client_debug_mask will be built to hold debug keyword/mask
 104  * values fetched from userspace.
 105  */
 106 struct client_debug_mask {
 107         char *keyword;
 108         __u64 mask1;
 109         __u64 mask2;
 110 };
 111
 112 /*
 113  * orangefs kernel memory related flags
 114  */
 115
 116 #if ((defined ORANGEFS_KERNEL_DEBUG) && (defined CONFIG_DEBUG_SLAB))
 117 #define ORANGEFS_CACHE_CREATE_FLAGS SLAB_RED_ZONE
 118 #else
 119 #define ORANGEFS_CACHE_CREATE_FLAGS 0
 120 #endif /* ((defined ORANGEFS_KERNEL_DEBUG) && (defined CONFIG_DEBUG_SLAB)) */
 121
 122 /* these functions are defined in orangefs-utils.c */
 123 int orangefs_prepare_cdm_array(char *debug_array_string);
 124 int orangefs_prepare_debugfs_help_string(int);
 125
 126 /* defined in orangefs-debugfs.c */
 127 int orangefs_client_debug_init(void);
 128
 129 void debug_string_to_mask(char *, void *, int);
 130 void do_c_mask(int, char *, struct client_debug_mask **);
 131 void do_k_mask(int, char *, __u64 **);
 132
 133 void debug_mask_to_string(void *, int);
 134 void do_k_string(void *, int);
 135 void do_c_string(void *, int);
 136 int check_amalgam_keyword(void *, int);
 137 int keyword_is_amalgam(char *);
 138
 139 /*these variables are defined in orangefs-mod.c */
 140 extern char kernel_debug_string[ORANGEFS_MAX_DEBUG_STRING_LEN];
 141 extern char client_debug_string[ORANGEFS_MAX_DEBUG_STRING_LEN];
 142 extern char client_debug_array_string[ORANGEFS_MAX_DEBUG_STRING_LEN];
 143 extern unsigned int kernel_mask_set_mod_init;
 144
 145 extern int orangefs_init_acl(struct inode *inode, struct inode *dir);
 146 extern const struct xattr_handler *orangefs_xattr_handlers[];
 147
 148 extern struct posix_acl *orangefs_get_acl(struct inode *inode, int type);
 149 extern int orangefs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
 150
 151 /*
 152  * Redefine xtvec structure so that we could move helper functions out of
 153  * the define
 154  */
 155 struct xtvec {
 156         __kernel_off_t xtv_off;         /* must be off_t */
 157         __kernel_size_t xtv_len;        /* must be size_t */
 158 };
 159
 160 /*
 161  * orangefs data structures
 162  */
 163 struct orangefs_kernel_op_s {
 164         enum orangefs_vfs_op_states op_state;
 165         __u64 tag;
 166
 167         /*
 168          * Set uses_shared_memory to non zero if this operation uses
 169          * shared memory. If true, then a retry on the op must also
 170          * get a new shared memory buffer and re-populate it.
 171          * Cancels don't care - it only matters for service_operation()
 172          * retry logics and cancels don't go through it anymore. It
 173          * safely stays non-zero when we use it as slot_to_free.
 174          */
 175         union {
 176                 int uses_shared_memory;
 177                 int slot_to_free;
 178         };
 179
 180         struct orangefs_upcall_s upcall;
 181         struct orangefs_downcall_s downcall;
 182
 183         struct completion waitq;
 184         spinlock_t lock;
 185
 186         int attempts;
 187
 188         struct list_head list;
 189 };
 190
 191 #define set_op_state_waiting(op)     ((op)->op_state = OP_VFS_STATE_WAITING)
 192 #define set_op_state_inprogress(op)  ((op)->op_state = OP_VFS_STATE_INPROGR)
 193 #define set_op_state_given_up(op)  ((op)->op_state = OP_VFS_STATE_GIVEN_UP)
 194 static inline void set_op_state_serviced(struct orangefs_kernel_op_s *op)
 195 {
 196         op->op_state = OP_VFS_STATE_SERVICED;
 197         complete(&op->waitq);
 198 }
 199
 200 #define op_state_waiting(op)     ((op)->op_state & OP_VFS_STATE_WAITING)
 201 #define op_state_in_progress(op) ((op)->op_state & OP_VFS_STATE_INPROGR)
 202 #define op_state_serviced(op)    ((op)->op_state & OP_VFS_STATE_SERVICED)
 203 #define op_state_purged(op)      ((op)->op_state & OP_VFS_STATE_PURGED)
 204 #define op_state_given_up(op)    ((op)->op_state & OP_VFS_STATE_GIVEN_UP)
 205 #define op_is_cancel(op)         ((op)->upcall.type == ORANGEFS_VFS_OP_CANCEL)
 206
 207 void op_release(struct orangefs_kernel_op_s *op);
 208
 209 extern void orangefs_bufmap_put(int);
 210 static inline void put_cancel(struct orangefs_kernel_op_s *op)
 211 {
 212         orangefs_bufmap_put(op->slot_to_free);
 213         op_release(op);
 214 }
 215
 216 static inline void set_op_state_purged(struct orangefs_kernel_op_s *op)
 217 {
 218         spin_lock(&op->lock);
 219         if (unlikely(op_is_cancel(op))) {
 220                 list_del_init(&op->list);
 221                 spin_unlock(&op->lock);
 222                 put_cancel(op);
 223         } else {
 224                 op->op_state |= OP_VFS_STATE_PURGED;
 225                 complete(&op->waitq);
 226                 spin_unlock(&op->lock);
 227         }
 228 }
 229
 230 /* per inode private orangefs info */
 231 struct orangefs_inode_s {
 232         struct orangefs_object_kref refn;
 233         char link_target[ORANGEFS_NAME_MAX];
 234         __s64 blksize;
 235         /*
 236          * Reading/Writing Extended attributes need to acquire the appropriate
 237          * reader/writer semaphore on the orangefs_inode_s structure.
 238          */
 239         struct rw_semaphore xattr_sem;
 240
 241         struct inode vfs_inode;
 242         sector_t last_failed_block_index_read;
 243
 244         /*
 245          * State of in-memory attributes not yet flushed to disk associated
 246          * with this object
 247          */
 248         unsigned long pinode_flags;
 249
 250         unsigned long getattr_time;
 251 };
 252
 253 #define P_ATIME_FLAG 0
 254 #define P_MTIME_FLAG 1
 255 #define P_CTIME_FLAG 2
 256 #define P_MODE_FLAG  3
 257
 258 #define ClearAtimeFlag(pinode) clear_bit(P_ATIME_FLAG, &(pinode)->pinode_flags)
 259 #define SetAtimeFlag(pinode)   set_bit(P_ATIME_FLAG, &(pinode)->pinode_flags)
 260 #define AtimeFlag(pinode)      test_bit(P_ATIME_FLAG, &(pinode)->pinode_flags)
 261
 262 #define ClearMtimeFlag(pinode) clear_bit(P_MTIME_FLAG, &(pinode)->pinode_flags)
 263 #define SetMtimeFlag(pinode)   set_bit(P_MTIME_FLAG, &(pinode)->pinode_flags)
 264 #define MtimeFlag(pinode)      test_bit(P_MTIME_FLAG, &(pinode)->pinode_flags)
 265
 266 #define ClearCtimeFlag(pinode) clear_bit(P_CTIME_FLAG, &(pinode)->pinode_flags)
 267 #define SetCtimeFlag(pinode)   set_bit(P_CTIME_FLAG, &(pinode)->pinode_flags)
 268 #define CtimeFlag(pinode)      test_bit(P_CTIME_FLAG, &(pinode)->pinode_flags)
 269
 270 #define ClearModeFlag(pinode) clear_bit(P_MODE_FLAG, &(pinode)->pinode_flags)
 271 #define SetModeFlag(pinode)   set_bit(P_MODE_FLAG, &(pinode)->pinode_flags)
 272 #define ModeFlag(pinode)      test_bit(P_MODE_FLAG, &(pinode)->pinode_flags)
 273
 274 /* per superblock private orangefs info */
 275 struct orangefs_sb_info_s {
 276         struct orangefs_khandle root_khandle;
 277         __s32 fs_id;
 278         int id;
 279         int flags;
 280 #define ORANGEFS_OPT_INTR       0x01
 281 #define ORANGEFS_OPT_LOCAL_LOCK 0x02
 282         char devname[ORANGEFS_MAX_SERVER_ADDR_LEN];
 283         struct super_block *sb;
 284         int mount_pending;
 285         struct list_head list;
 286 };
 287
 288 /*
 289  * structure that holds the state of any async I/O operation issued
 290  * through the VFS. Needed especially to handle cancellation requests
 291  * or even completion notification so that the VFS client-side daemon
 292  * can free up its vfs_request slots.
 293  */
 294 struct orangefs_kiocb_s {
 295         /* the pointer to the task that initiated the AIO */
 296         struct task_struct *tsk;
 297
 298         /* pointer to the kiocb that kicked this operation */
 299         struct kiocb *kiocb;
 300
 301         /* buffer index that was used for the I/O */
 302         struct orangefs_bufmap *bufmap;
 303         int buffer_index;
 304
 305         /* orangefs kernel operation type */
 306         struct orangefs_kernel_op_s *op;
 307
 308         /* The user space buffers from/to which I/O is being staged */
 309         struct iovec *iov;
 310
 311         /* number of elements in the iovector */
 312         unsigned long nr_segs;
 313
 314         /* set to indicate the type of the operation */
 315         int rw;
 316
 317         /* file offset */
 318         loff_t offset;
 319
 320         /* and the count in bytes */
 321         size_t bytes_to_be_copied;
 322
 323         ssize_t bytes_copied;
 324         int needs_cleanup;
 325 };
 326
 327 struct orangefs_stats {
 328         unsigned long cache_hits;
 329         unsigned long cache_misses;
 330         unsigned long reads;
 331         unsigned long writes;
 332 };
 333
 334 extern struct orangefs_stats g_orangefs_stats;
 335
 336 /*
 337  * NOTE: See Documentation/filesystems/porting for information
 338  * on implementing FOO_I and properly accessing fs private data
 339  */
 340 static inline struct orangefs_inode_s *ORANGEFS_I(struct inode *inode)
 341 {
 342         return container_of(inode, struct orangefs_inode_s, vfs_inode);
 343 }
 344
 345 static inline struct orangefs_sb_info_s *ORANGEFS_SB(struct super_block *sb)
 346 {
 347         return (struct orangefs_sb_info_s *) sb->s_fs_info;
 348 }
 349
 350 /* ino_t descends from "unsigned long", 8 bytes, 64 bits. */
 351 static inline ino_t orangefs_khandle_to_ino(struct orangefs_khandle *khandle)
 352 {
 353         union {
 354                 unsigned char u[8];
 355                 __u64 ino;
 356         } ihandle;
 357
 358         ihandle.u[0] = khandle->u[0] ^ khandle->u[4];
 359         ihandle.u[1] = khandle->u[1] ^ khandle->u[5];
 360         ihandle.u[2] = khandle->u[2] ^ khandle->u[6];
 361         ihandle.u[3] = khandle->u[3] ^ khandle->u[7];
 362         ihandle.u[4] = khandle->u[12] ^ khandle->u[8];
 363         ihandle.u[5] = khandle->u[13] ^ khandle->u[9];
 364         ihandle.u[6] = khandle->u[14] ^ khandle->u[10];
 365         ihandle.u[7] = khandle->u[15] ^ khandle->u[11];
 366
 367         return ihandle.ino;
 368 }
 369
 370 static inline struct orangefs_khandle *get_khandle_from_ino(struct inode *inode)
 371 {
 372         return &(ORANGEFS_I(inode)->refn.khandle);
 373 }
 374
 375 static inline __s32 get_fsid_from_ino(struct inode *inode)
 376 {
 377         return ORANGEFS_I(inode)->refn.fs_id;
 378 }
 379
 380 static inline ino_t get_ino_from_khandle(struct inode *inode)
 381 {
 382         struct orangefs_khandle *khandle;
 383         ino_t ino;
 384
 385         khandle = get_khandle_from_ino(inode);
 386         ino = orangefs_khandle_to_ino(khandle);
 387         return ino;
 388 }
 389
 390 static inline ino_t get_parent_ino_from_dentry(struct dentry *dentry)
 391 {
 392         return get_ino_from_khandle(dentry->d_parent->d_inode);
 393 }
 394
 395 static inline int is_root_handle(struct inode *inode)
 396 {
 397         gossip_debug(GOSSIP_DCACHE_DEBUG,
 398                      "%s: root handle: %pU, this handle: %pU:\n",
 399                      __func__,
 400                      &ORANGEFS_SB(inode->i_sb)->root_khandle,
 401                      get_khandle_from_ino(inode));
 402
 403         if (ORANGEFS_khandle_cmp(&(ORANGEFS_SB(inode->i_sb)->root_khandle),
 404                              get_khandle_from_ino(inode)))
 405                 return 0;
 406         else
 407                 return 1;
 408 }
 409
 410 static inline int match_handle(struct orangefs_khandle resp_handle,
 411                                struct inode *inode)
 412 {
 413         gossip_debug(GOSSIP_DCACHE_DEBUG,
 414                      "%s: one handle: %pU, another handle:%pU:\n",
 415                      __func__,
 416                      &resp_handle,
 417                      get_khandle_from_ino(inode));
 418
 419         if (ORANGEFS_khandle_cmp(&resp_handle, get_khandle_from_ino(inode)))
 420                 return 0;
 421         else
 422                 return 1;
 423 }
 424
 425 /*
 426  * defined in orangefs-cache.c
 427  */
 428 int op_cache_initialize(void);
 429 int op_cache_finalize(void);
 430 struct orangefs_kernel_op_s *op_alloc(__s32 type);
 431 void orangefs_new_tag(struct orangefs_kernel_op_s *op);
 432 char *get_opname_string(struct orangefs_kernel_op_s *new_op);
 433
 434 int orangefs_inode_cache_initialize(void);
 435 int orangefs_inode_cache_finalize(void);
 436
 437 /*
 438  * defined in orangefs-mod.c
 439  */
 440 void purge_inprogress_ops(void);
 441
 442 /*
 443  * defined in waitqueue.c
 444  */
 445 void purge_waiting_ops(void);
 446
 447 /*
 448  * defined in super.c
 449  */
 450 struct dentry *orangefs_mount(struct file_system_type *fst,
 451                            int flags,
 452                            const char *devname,
 453                            void *data);
 454
 455 void orangefs_kill_sb(struct super_block *sb);
 456 int orangefs_remount(struct orangefs_sb_info_s *);
 457
 458 int fsid_key_table_initialize(void);
 459 void fsid_key_table_finalize(void);
 460
 461 /*
 462  * defined in inode.c
 463  */
 464 __u32 convert_to_orangefs_mask(unsigned long lite_mask);
 465 struct inode *orangefs_new_inode(struct super_block *sb,
 466                               struct inode *dir,
 467                               int mode,
 468                               dev_t dev,
 469                               struct orangefs_object_kref *ref);
 470
 471 int orangefs_setattr(struct dentry *dentry, struct iattr *iattr);
 472
 473 int orangefs_getattr(struct vfsmount *mnt,
 474                   struct dentry *dentry,
 475                   struct kstat *kstat);
 476
 477 int orangefs_permission(struct inode *inode, int mask);
 478
 479 /*
 480  * defined in xattr.c
 481  */
 482 int orangefs_setxattr(struct dentry *dentry,
 483                    const char *name,
 484                    const void *value,
 485                    size_t size,
 486                    int flags);
 487
 488 ssize_t orangefs_getxattr(struct dentry *dentry,
 489                        const char *name,
 490                        void *buffer,
 491                        size_t size);
 492
 493 ssize_t orangefs_listxattr(struct dentry *dentry, char *buffer, size_t size);
 494
 495 /*
 496  * defined in namei.c
 497  */
 498 struct inode *orangefs_iget(struct super_block *sb,
 499                          struct orangefs_object_kref *ref);
 500
 501 ssize_t orangefs_inode_read(struct inode *inode,
 502                             struct iov_iter *iter,
 503                             loff_t *offset,
 504                             loff_t readahead_size);
 505
 506 /*
 507  * defined in devorangefs-req.c
 508  */
 509 int orangefs_dev_init(void);
 510 void orangefs_dev_cleanup(void);
 511 int is_daemon_in_service(void);
 512 bool __is_daemon_in_service(void);
 513
 514 /*
 515  * defined in orangefs-utils.c
 516  */
 517 __s32 fsid_of_op(struct orangefs_kernel_op_s *op);
 518
 519 int orangefs_flush_inode(struct inode *inode);
 520
 521 ssize_t orangefs_inode_getxattr(struct inode *inode,
 522                              const char *name,
 523                              void *buffer,
 524                              size_t size);
 525
 526 int orangefs_inode_setxattr(struct inode *inode,
 527                          const char *name,
 528                          const void *value,
 529                          size_t size,
 530                          int flags);
 531
 532 int orangefs_inode_getattr(struct inode *inode, int new, int bypass);
 533
 534 int orangefs_inode_check_changed(struct inode *inode);
 535
 536 int orangefs_inode_setattr(struct inode *inode, struct iattr *iattr);
 537
 538 void orangefs_make_bad_inode(struct inode *inode);
 539
 540 int orangefs_unmount_sb(struct super_block *sb);
 541
 542 bool orangefs_cancel_op_in_progress(struct orangefs_kernel_op_s *op);
 543
 544 int orangefs_normalize_to_errno(__s32 error_code);
 545
 546 extern struct mutex devreq_mutex;
 547 extern struct mutex request_mutex;
 548 extern int debug;
 549 extern int op_timeout_secs;
 550 extern int slot_timeout_secs;
 551 extern int dcache_timeout_msecs;
 552 extern int getattr_timeout_msecs;
 553 extern struct list_head orangefs_superblocks;
 554 extern spinlock_t orangefs_superblocks_lock;
 555 extern struct list_head orangefs_request_list;
 556 extern spinlock_t orangefs_request_list_lock;
 557 extern wait_queue_head_t orangefs_request_list_waitq;
 558 extern struct list_head *htable_ops_in_progress;
 559 extern spinlock_t htable_ops_in_progress_lock;
 560 extern int hash_table_size;
 561
 562 extern const struct address_space_operations orangefs_address_operations;
 563 extern struct backing_dev_info orangefs_backing_dev_info;
 564 extern const struct inode_operations orangefs_file_inode_operations;
 565 extern const struct file_operations orangefs_file_operations;
 566 extern const struct inode_operations orangefs_symlink_inode_operations;
 567 extern const struct inode_operations orangefs_dir_inode_operations;
 568 extern const struct file_operations orangefs_dir_operations;
 569 extern const struct dentry_operations orangefs_dentry_operations;
 570 extern const struct file_operations orangefs_devreq_file_operations;
 571
 572 extern wait_queue_head_t orangefs_bufmap_init_waitq;
 573
 574 /*
 575  * misc convenience macros
 576  */
 577
 578 #define ORANGEFS_OP_INTERRUPTIBLE 1   /* service_operation() is interruptible */
 579 #define ORANGEFS_OP_PRIORITY      2   /* service_operation() is high priority */
 580 #define ORANGEFS_OP_CANCELLATION  4   /* this is a cancellation */
 581 #define ORANGEFS_OP_NO_MUTEX      8   /* don't acquire request_mutex */
 582 #define ORANGEFS_OP_ASYNC         16  /* Queue it, but don't wait */
 583
 584 int service_operation(struct orangefs_kernel_op_s *op,
 585                       const char *op_name,
 586                       int flags);
 587
 588 #define get_interruptible_flag(inode) \
 589         ((ORANGEFS_SB(inode->i_sb)->flags & ORANGEFS_OPT_INTR) ? \
 590                 ORANGEFS_OP_INTERRUPTIBLE : 0)
 591
 592 #define fill_default_sys_attrs(sys_attr, type, mode)                    \
 593 do {                                                                    \
 594         sys_attr.owner = from_kuid(&init_user_ns, current_fsuid()); \
 595         sys_attr.group = from_kgid(&init_user_ns, current_fsgid()); \
 596         sys_attr.perms = ORANGEFS_util_translate_mode(mode);            \
 597         sys_attr.mtime = 0;                                             \
 598         sys_attr.atime = 0;                                             \
 599         sys_attr.ctime = 0;                                             \
 600         sys_attr.mask = ORANGEFS_ATTR_SYS_ALL_SETABLE;                  \
 601 } while (0)
 602
 603 static inline void orangefs_i_size_write(struct inode *inode, loff_t i_size)
 604 {
 605 #if BITS_PER_LONG == 32 && defined(CONFIG_SMP)
 606         inode_lock(inode);
 607 #endif
 608         i_size_write(inode, i_size);
 609 #if BITS_PER_LONG == 32 && defined(CONFIG_SMP)
 610         inode_unlock(inode);
 611 #endif
 612 }
 613
 614 #endif /* __ORANGEFSKERNEL_H */