2 * (C) 2001 Clemson University and The University of Chicago
4 * See COPYING in top-level directory.
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.
15 * Declarations and macros for the ORANGEFS Linux kernel support.
18 #ifndef __ORANGEFSKERNEL_H
19 #define __ORANGEFSKERNEL_H
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>
34 #include <linux/vmalloc.h>
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>
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>
54 #include <asm/unaligned.h>
56 #include "orangefs-dev-proto.h"
58 #ifdef ORANGEFS_KERNEL_DEBUG
59 #define ORANGEFS_DEFAULT_OP_TIMEOUT_SECS 10
61 #define ORANGEFS_DEFAULT_OP_TIMEOUT_SECS 20
64 #define ORANGEFS_BUFMAP_WAIT_TIMEOUT_SECS 30
66 #define ORANGEFS_DEFAULT_SLOT_TIMEOUT_SECS 900 /* 15 minutes */
68 #define ORANGEFS_REQDEVICE_NAME "pvfs2-req"
70 #define ORANGEFS_DEVREQ_MAGIC 0x20030529
71 #define ORANGEFS_LINK_MAX 0x000000FF
72 #define ORANGEFS_PURGE_RETRY_COUNT 0x00000005
73 #define ORANGEFS_SEEK_END 0x00000002
74 #define ORANGEFS_MAX_NUM_OPTIONS 0x00000004
75 #define ORANGEFS_MAX_MOUNT_OPT_LEN 0x00000080
76 #define ORANGEFS_MAX_FSKEY_LEN 64
78 #define MAX_DEV_REQ_UPSIZE (2 * sizeof(__s32) + \
79 sizeof(__u64) + sizeof(struct orangefs_upcall_s))
80 #define MAX_DEV_REQ_DOWNSIZE (2 * sizeof(__s32) + \
81 sizeof(__u64) + sizeof(struct orangefs_downcall_s))
84 * valid orangefs kernel operation states
86 * unknown - op was just initialized
87 * waiting - op is on request_list (upward bound)
88 * inprogr - op is in progress (waiting for downcall)
89 * serviced - op has matching downcall; ok
90 * purged - op has to start a timer since client-core
91 * exited uncleanly before servicing op
92 * given up - submitter has given up waiting for it
94 enum orangefs_vfs_op_states {
95 OP_VFS_STATE_UNKNOWN = 0,
96 OP_VFS_STATE_WAITING = 1,
97 OP_VFS_STATE_INPROGR = 2,
98 OP_VFS_STATE_SERVICED = 4,
99 OP_VFS_STATE_PURGED = 8,
100 OP_VFS_STATE_GIVEN_UP = 16,
104 * Defines for controlling whether I/O upcalls are for async or sync operations
106 enum ORANGEFS_async_io_type {
107 ORANGEFS_VFS_SYNC_IO = 0,
108 ORANGEFS_VFS_ASYNC_IO = 1,
112 * An array of client_debug_mask will be built to hold debug keyword/mask
113 * values fetched from userspace.
115 struct client_debug_mask {
122 * orangefs kernel memory related flags
125 #if ((defined ORANGEFS_KERNEL_DEBUG) && (defined CONFIG_DEBUG_SLAB))
126 #define ORANGEFS_CACHE_CREATE_FLAGS SLAB_RED_ZONE
128 #define ORANGEFS_CACHE_CREATE_FLAGS 0
129 #endif /* ((defined ORANGEFS_KERNEL_DEBUG) && (defined CONFIG_DEBUG_SLAB)) */
131 #define ORANGEFS_CACHE_ALLOC_FLAGS (GFP_KERNEL)
132 #define ORANGEFS_GFP_FLAGS (GFP_KERNEL)
133 #define ORANGEFS_BUFMAP_GFP_FLAGS (GFP_KERNEL)
135 /* orangefs xattr and acl related defines */
136 #define ORANGEFS_XATTR_INDEX_POSIX_ACL_ACCESS 1
137 #define ORANGEFS_XATTR_INDEX_POSIX_ACL_DEFAULT 2
138 #define ORANGEFS_XATTR_INDEX_TRUSTED 3
139 #define ORANGEFS_XATTR_INDEX_DEFAULT 4
141 #define ORANGEFS_XATTR_NAME_ACL_ACCESS XATTR_NAME_POSIX_ACL_ACCESS
142 #define ORANGEFS_XATTR_NAME_ACL_DEFAULT XATTR_NAME_POSIX_ACL_DEFAULT
143 #define ORANGEFS_XATTR_NAME_TRUSTED_PREFIX "trusted."
144 #define ORANGEFS_XATTR_NAME_DEFAULT_PREFIX ""
146 /* these functions are defined in orangefs-utils.c */
147 int orangefs_prepare_cdm_array(char *debug_array_string);
148 int orangefs_prepare_debugfs_help_string(int);
150 /* defined in orangefs-debugfs.c */
151 int orangefs_client_debug_init(void);
153 void debug_string_to_mask(char *, void *, int);
154 void do_c_mask(int, char *, struct client_debug_mask **);
155 void do_k_mask(int, char *, __u64 **);
157 void debug_mask_to_string(void *, int);
158 void do_k_string(void *, int);
159 void do_c_string(void *, int);
160 int check_amalgam_keyword(void *, int);
161 int keyword_is_amalgam(char *);
163 /*these variables are defined in orangefs-mod.c */
164 extern char kernel_debug_string[ORANGEFS_MAX_DEBUG_STRING_LEN];
165 extern char client_debug_string[ORANGEFS_MAX_DEBUG_STRING_LEN];
166 extern char client_debug_array_string[ORANGEFS_MAX_DEBUG_STRING_LEN];
167 extern unsigned int kernel_mask_set_mod_init;
169 extern int orangefs_init_acl(struct inode *inode, struct inode *dir);
170 extern const struct xattr_handler *orangefs_xattr_handlers[];
172 extern struct posix_acl *orangefs_get_acl(struct inode *inode, int type);
173 extern int orangefs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
176 * Redefine xtvec structure so that we could move helper functions out of
180 __kernel_off_t xtv_off; /* must be off_t */
181 __kernel_size_t xtv_len; /* must be size_t */
185 * orangefs data structures
187 struct orangefs_kernel_op_s {
188 enum orangefs_vfs_op_states op_state;
192 * Set uses_shared_memory to 1 if this operation uses shared memory.
193 * If true, then a retry on the op must also get a new shared memory
194 * buffer and re-populate it.
196 int uses_shared_memory;
198 struct orangefs_upcall_s upcall;
199 struct orangefs_downcall_s downcall;
201 wait_queue_head_t waitq;
204 struct completion done;
210 /* used by the async I/O code to stash the orangefs_kiocb_s structure */
215 struct list_head list;
218 #define set_op_state_waiting(op) ((op)->op_state = OP_VFS_STATE_WAITING)
219 #define set_op_state_inprogress(op) ((op)->op_state = OP_VFS_STATE_INPROGR)
220 static inline void set_op_state_serviced(struct orangefs_kernel_op_s *op)
222 op->op_state = OP_VFS_STATE_SERVICED;
223 wake_up_interruptible(&op->waitq);
225 static inline void set_op_state_purged(struct orangefs_kernel_op_s *op)
227 op->op_state |= OP_VFS_STATE_PURGED;
228 wake_up_interruptible(&op->waitq);
231 #define op_state_waiting(op) ((op)->op_state & OP_VFS_STATE_WAITING)
232 #define op_state_in_progress(op) ((op)->op_state & OP_VFS_STATE_INPROGR)
233 #define op_state_serviced(op) ((op)->op_state & OP_VFS_STATE_SERVICED)
234 #define op_state_purged(op) ((op)->op_state & OP_VFS_STATE_PURGED)
235 #define op_state_given_up(op) ((op)->op_state & OP_VFS_STATE_GIVEN_UP)
237 static inline void get_op(struct orangefs_kernel_op_s *op)
239 atomic_inc(&op->ref_count);
240 gossip_debug(GOSSIP_DEV_DEBUG,
241 "(get) Alloced OP (%p:%llu)\n", op, llu(op->tag));
244 void __op_release(struct orangefs_kernel_op_s *op);
246 static inline void op_release(struct orangefs_kernel_op_s *op)
248 if (atomic_dec_and_test(&op->ref_count)) {
249 gossip_debug(GOSSIP_DEV_DEBUG,
250 "(put) Releasing OP (%p:%llu)\n", op, llu((op)->tag));
255 /* per inode private orangefs info */
256 struct orangefs_inode_s {
257 struct orangefs_object_kref refn;
258 char link_target[ORANGEFS_NAME_MAX];
261 * Reading/Writing Extended attributes need to acquire the appropriate
262 * reader/writer semaphore on the orangefs_inode_s structure.
264 struct rw_semaphore xattr_sem;
266 struct inode vfs_inode;
267 sector_t last_failed_block_index_read;
270 * State of in-memory attributes not yet flushed to disk associated
273 unsigned long pinode_flags;
276 #define P_ATIME_FLAG 0
277 #define P_MTIME_FLAG 1
278 #define P_CTIME_FLAG 2
279 #define P_MODE_FLAG 3
281 #define ClearAtimeFlag(pinode) clear_bit(P_ATIME_FLAG, &(pinode)->pinode_flags)
282 #define SetAtimeFlag(pinode) set_bit(P_ATIME_FLAG, &(pinode)->pinode_flags)
283 #define AtimeFlag(pinode) test_bit(P_ATIME_FLAG, &(pinode)->pinode_flags)
285 #define ClearMtimeFlag(pinode) clear_bit(P_MTIME_FLAG, &(pinode)->pinode_flags)
286 #define SetMtimeFlag(pinode) set_bit(P_MTIME_FLAG, &(pinode)->pinode_flags)
287 #define MtimeFlag(pinode) test_bit(P_MTIME_FLAG, &(pinode)->pinode_flags)
289 #define ClearCtimeFlag(pinode) clear_bit(P_CTIME_FLAG, &(pinode)->pinode_flags)
290 #define SetCtimeFlag(pinode) set_bit(P_CTIME_FLAG, &(pinode)->pinode_flags)
291 #define CtimeFlag(pinode) test_bit(P_CTIME_FLAG, &(pinode)->pinode_flags)
293 #define ClearModeFlag(pinode) clear_bit(P_MODE_FLAG, &(pinode)->pinode_flags)
294 #define SetModeFlag(pinode) set_bit(P_MODE_FLAG, &(pinode)->pinode_flags)
295 #define ModeFlag(pinode) test_bit(P_MODE_FLAG, &(pinode)->pinode_flags)
297 /* per superblock private orangefs info */
298 struct orangefs_sb_info_s {
299 struct orangefs_khandle root_khandle;
303 #define ORANGEFS_OPT_INTR 0x01
304 #define ORANGEFS_OPT_LOCAL_LOCK 0x02
305 char devname[ORANGEFS_MAX_SERVER_ADDR_LEN];
306 struct super_block *sb;
308 struct list_head list;
312 * structure that holds the state of any async I/O operation issued
313 * through the VFS. Needed especially to handle cancellation requests
314 * or even completion notification so that the VFS client-side daemon
315 * can free up its vfs_request slots.
317 struct orangefs_kiocb_s {
318 /* the pointer to the task that initiated the AIO */
319 struct task_struct *tsk;
321 /* pointer to the kiocb that kicked this operation */
324 /* buffer index that was used for the I/O */
325 struct orangefs_bufmap *bufmap;
328 /* orangefs kernel operation type */
329 struct orangefs_kernel_op_s *op;
331 /* The user space buffers from/to which I/O is being staged */
334 /* number of elements in the iovector */
335 unsigned long nr_segs;
337 /* set to indicate the type of the operation */
343 /* and the count in bytes */
344 size_t bytes_to_be_copied;
346 ssize_t bytes_copied;
350 struct orangefs_stats {
351 unsigned long cache_hits;
352 unsigned long cache_misses;
354 unsigned long writes;
357 extern struct orangefs_stats g_orangefs_stats;
360 * NOTE: See Documentation/filesystems/porting for information
361 * on implementing FOO_I and properly accessing fs private data
363 static inline struct orangefs_inode_s *ORANGEFS_I(struct inode *inode)
365 return container_of(inode, struct orangefs_inode_s, vfs_inode);
368 static inline struct orangefs_sb_info_s *ORANGEFS_SB(struct super_block *sb)
370 return (struct orangefs_sb_info_s *) sb->s_fs_info;
373 /* ino_t descends from "unsigned long", 8 bytes, 64 bits. */
374 static inline ino_t orangefs_khandle_to_ino(struct orangefs_khandle *khandle)
381 ihandle.u[0] = khandle->u[0] ^ khandle->u[4];
382 ihandle.u[1] = khandle->u[1] ^ khandle->u[5];
383 ihandle.u[2] = khandle->u[2] ^ khandle->u[6];
384 ihandle.u[3] = khandle->u[3] ^ khandle->u[7];
385 ihandle.u[4] = khandle->u[12] ^ khandle->u[8];
386 ihandle.u[5] = khandle->u[13] ^ khandle->u[9];
387 ihandle.u[6] = khandle->u[14] ^ khandle->u[10];
388 ihandle.u[7] = khandle->u[15] ^ khandle->u[11];
393 static inline struct orangefs_khandle *get_khandle_from_ino(struct inode *inode)
395 return &(ORANGEFS_I(inode)->refn.khandle);
398 static inline __s32 get_fsid_from_ino(struct inode *inode)
400 return ORANGEFS_I(inode)->refn.fs_id;
403 static inline ino_t get_ino_from_khandle(struct inode *inode)
405 struct orangefs_khandle *khandle;
408 khandle = get_khandle_from_ino(inode);
409 ino = orangefs_khandle_to_ino(khandle);
413 static inline ino_t get_parent_ino_from_dentry(struct dentry *dentry)
415 return get_ino_from_khandle(dentry->d_parent->d_inode);
418 static inline int is_root_handle(struct inode *inode)
420 gossip_debug(GOSSIP_DCACHE_DEBUG,
421 "%s: root handle: %pU, this handle: %pU:\n",
423 &ORANGEFS_SB(inode->i_sb)->root_khandle,
424 get_khandle_from_ino(inode));
426 if (ORANGEFS_khandle_cmp(&(ORANGEFS_SB(inode->i_sb)->root_khandle),
427 get_khandle_from_ino(inode)))
433 static inline int match_handle(struct orangefs_khandle resp_handle,
436 gossip_debug(GOSSIP_DCACHE_DEBUG,
437 "%s: one handle: %pU, another handle:%pU:\n",
440 get_khandle_from_ino(inode));
442 if (ORANGEFS_khandle_cmp(&resp_handle, get_khandle_from_ino(inode)))
449 * defined in orangefs-cache.c
451 int op_cache_initialize(void);
452 int op_cache_finalize(void);
453 struct orangefs_kernel_op_s *op_alloc(__s32 type);
454 char *get_opname_string(struct orangefs_kernel_op_s *new_op);
456 int dev_req_cache_initialize(void);
457 int dev_req_cache_finalize(void);
458 void *dev_req_alloc(void);
459 void dev_req_release(void *);
461 int orangefs_inode_cache_initialize(void);
462 int orangefs_inode_cache_finalize(void);
464 int kiocb_cache_initialize(void);
465 int kiocb_cache_finalize(void);
466 struct orangefs_kiocb_s *kiocb_alloc(void);
467 void kiocb_release(struct orangefs_kiocb_s *ptr);
470 * defined in orangefs-mod.c
472 void purge_inprogress_ops(void);
475 * defined in waitqueue.c
477 void purge_waiting_ops(void);
482 struct dentry *orangefs_mount(struct file_system_type *fst,
487 void orangefs_kill_sb(struct super_block *sb);
488 int orangefs_remount(struct super_block *sb);
490 int fsid_key_table_initialize(void);
491 void fsid_key_table_finalize(void);
496 __u32 convert_to_orangefs_mask(unsigned long lite_mask);
497 struct inode *orangefs_new_inode(struct super_block *sb,
501 struct orangefs_object_kref *ref);
503 int orangefs_setattr(struct dentry *dentry, struct iattr *iattr);
505 int orangefs_getattr(struct vfsmount *mnt,
506 struct dentry *dentry,
507 struct kstat *kstat);
512 int orangefs_setxattr(struct dentry *dentry,
518 ssize_t orangefs_getxattr(struct dentry *dentry,
523 ssize_t orangefs_listxattr(struct dentry *dentry, char *buffer, size_t size);
528 struct inode *orangefs_iget(struct super_block *sb,
529 struct orangefs_object_kref *ref);
531 ssize_t orangefs_inode_read(struct inode *inode,
532 struct iov_iter *iter,
534 loff_t readahead_size);
537 * defined in devorangefs-req.c
539 int orangefs_dev_init(void);
540 void orangefs_dev_cleanup(void);
541 int is_daemon_in_service(void);
542 int fs_mount_pending(__s32 fsid);
545 * defined in orangefs-utils.c
547 __s32 fsid_of_op(struct orangefs_kernel_op_s *op);
549 int orangefs_flush_inode(struct inode *inode);
551 ssize_t orangefs_inode_getxattr(struct inode *inode,
557 int orangefs_inode_setxattr(struct inode *inode,
564 int orangefs_inode_getattr(struct inode *inode, __u32 mask);
566 int orangefs_inode_setattr(struct inode *inode, struct iattr *iattr);
568 void orangefs_op_initialize(struct orangefs_kernel_op_s *op);
570 void orangefs_make_bad_inode(struct inode *inode);
572 void orangefs_block_signals(sigset_t *);
574 void orangefs_set_signals(sigset_t *);
576 int orangefs_unmount_sb(struct super_block *sb);
578 int orangefs_cancel_op_in_progress(__u64 tag);
580 static inline __u64 orangefs_convert_time_field(const struct timespec *ts)
582 return (__u64)ts->tv_sec;
585 int orangefs_normalize_to_errno(__s32 error_code);
587 extern struct mutex devreq_mutex;
588 extern struct mutex request_mutex;
590 extern int op_timeout_secs;
591 extern int slot_timeout_secs;
592 extern struct list_head orangefs_superblocks;
593 extern spinlock_t orangefs_superblocks_lock;
594 extern struct list_head orangefs_request_list;
595 extern spinlock_t orangefs_request_list_lock;
596 extern wait_queue_head_t orangefs_request_list_waitq;
597 extern struct list_head *htable_ops_in_progress;
598 extern spinlock_t htable_ops_in_progress_lock;
599 extern int hash_table_size;
601 extern const struct address_space_operations orangefs_address_operations;
602 extern struct backing_dev_info orangefs_backing_dev_info;
603 extern struct inode_operations orangefs_file_inode_operations;
604 extern const struct file_operations orangefs_file_operations;
605 extern struct inode_operations orangefs_symlink_inode_operations;
606 extern struct inode_operations orangefs_dir_inode_operations;
607 extern const struct file_operations orangefs_dir_operations;
608 extern const struct dentry_operations orangefs_dentry_operations;
609 extern const struct file_operations orangefs_devreq_file_operations;
611 extern wait_queue_head_t orangefs_bufmap_init_waitq;
614 * misc convenience macros
617 #define ORANGEFS_OP_INTERRUPTIBLE 1 /* service_operation() is interruptible */
618 #define ORANGEFS_OP_PRIORITY 2 /* service_operation() is high priority */
619 #define ORANGEFS_OP_CANCELLATION 4 /* this is a cancellation */
620 #define ORANGEFS_OP_NO_SEMAPHORE 8 /* don't acquire semaphore */
621 #define ORANGEFS_OP_ASYNC 16 /* Queue it, but don't wait */
623 int service_operation(struct orangefs_kernel_op_s *op,
628 * handles two possible error cases, depending on context.
630 * by design, our vfs i/o errors need to be handled in one of two ways,
631 * depending on where the error occured.
633 * if the error happens in the waitqueue code because we either timed
634 * out or a signal was raised while waiting, we need to cancel the
635 * userspace i/o operation and free the op manually. this is done to
636 * avoid having the device start writing application data to our shared
637 * bufmap pages without us expecting it.
639 * FIXME: POSSIBLE OPTIMIZATION:
640 * However, if we timed out or if we got a signal AND our upcall was never
641 * picked off the queue (i.e. we were in OP_VFS_STATE_WAITING), then we don't
642 * need to send a cancellation upcall. The way we can handle this is
643 * set error_exit to 2 in such cases and 1 whenever cancellation has to be
644 * sent and have handle_error
645 * take care of this situation as well..
647 * if a orangefs sysint level error occured and i/o has been completed,
648 * there is no need to cancel the operation, as the user has finished
649 * using the bufmap page and so there is no danger in this case. in
650 * this case, we wake up the device normally so that it may free the
653 * note the only reason this is a macro is because both read and write
654 * cases need the exact same handling code.
656 #define handle_io_error() \
658 if (!op_state_serviced(new_op)) { \
659 orangefs_cancel_op_in_progress(new_op->tag); \
661 wake_up_daemon_for_return(new_op); \
663 orangefs_bufmap_put(bufmap, buffer_index); \
667 #define get_interruptible_flag(inode) \
668 ((ORANGEFS_SB(inode->i_sb)->flags & ORANGEFS_OPT_INTR) ? \
669 ORANGEFS_OP_INTERRUPTIBLE : 0)
671 #define add_orangefs_sb(sb) \
673 gossip_debug(GOSSIP_SUPER_DEBUG, \
674 "Adding SB %p to orangefs superblocks\n", \
676 spin_lock(&orangefs_superblocks_lock); \
677 list_add_tail(&ORANGEFS_SB(sb)->list, &orangefs_superblocks); \
678 spin_unlock(&orangefs_superblocks_lock); \
681 #define remove_orangefs_sb(sb) \
683 struct list_head *tmp = NULL; \
684 struct list_head *tmp_safe = NULL; \
685 struct orangefs_sb_info_s *orangefs_sb = NULL; \
687 spin_lock(&orangefs_superblocks_lock); \
688 list_for_each_safe(tmp, tmp_safe, &orangefs_superblocks) { \
689 orangefs_sb = list_entry(tmp, \
690 struct orangefs_sb_info_s, \
692 if (orangefs_sb && (orangefs_sb->sb == sb)) { \
693 gossip_debug(GOSSIP_SUPER_DEBUG, \
694 "Removing SB %p from orangefs superblocks\n", \
696 list_del(&orangefs_sb->list); \
700 spin_unlock(&orangefs_superblocks_lock); \
703 #define orangefs_lock_inode(inode) spin_lock(&inode->i_lock)
704 #define orangefs_unlock_inode(inode) spin_unlock(&inode->i_lock)
706 #define fill_default_sys_attrs(sys_attr, type, mode) \
708 sys_attr.owner = from_kuid(current_user_ns(), current_fsuid()); \
709 sys_attr.group = from_kgid(current_user_ns(), current_fsgid()); \
711 sys_attr.perms = ORANGEFS_util_translate_mode(mode); \
712 sys_attr.objtype = type; \
713 sys_attr.mask = ORANGEFS_ATTR_SYS_ALL_SETABLE; \
716 #define orangefs_inode_lock(__i) mutex_lock(&(__i)->i_mutex)
718 #define orangefs_inode_unlock(__i) mutex_unlock(&(__i)->i_mutex)
720 static inline void orangefs_i_size_write(struct inode *inode, loff_t i_size)
722 #if BITS_PER_LONG == 32 && defined(CONFIG_SMP)
723 orangefs_inode_lock(inode);
725 i_size_write(inode, i_size);
726 #if BITS_PER_LONG == 32 && defined(CONFIG_SMP)
727 orangefs_inode_unlock(inode);
731 static inline unsigned int diff(struct timeval *end, struct timeval *begin)
733 if (end->tv_usec < begin->tv_usec) {
734 end->tv_usec += 1000000;
737 end->tv_sec -= begin->tv_sec;
738 end->tv_usec -= begin->tv_usec;
739 return (end->tv_sec * 1000000) + end->tv_usec;
742 #endif /* __ORANGEFSKERNEL_H */