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get rid of bufmap argument of orangefs_bufmap_put()
[deliverable/linux.git] / fs / orangefs / orangefs-kernel.h
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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_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
77
78#define MAX_DEV_REQ_UPSIZE (2 * sizeof(__s32) + \
79sizeof(__u64) + sizeof(struct orangefs_upcall_s))
80#define MAX_DEV_REQ_DOWNSIZE (2 * sizeof(__s32) + \
81sizeof(__u64) + sizeof(struct orangefs_downcall_s))
82
83/*
84 * valid orangefs kernel operation states
85 *
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
93 */
94enum 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,
101};
102
103/*
104 * Defines for controlling whether I/O upcalls are for async or sync operations
105 */
106enum ORANGEFS_async_io_type {
107 ORANGEFS_VFS_SYNC_IO = 0,
108 ORANGEFS_VFS_ASYNC_IO = 1,
109};
110
111/*
112 * An array of client_debug_mask will be built to hold debug keyword/mask
113 * values fetched from userspace.
114 */
115struct client_debug_mask {
116 char *keyword;
117 __u64 mask1;
118 __u64 mask2;
119};
120
121/*
122 * orangefs kernel memory related flags
123 */
124
125#if ((defined ORANGEFS_KERNEL_DEBUG) && (defined CONFIG_DEBUG_SLAB))
126#define ORANGEFS_CACHE_CREATE_FLAGS SLAB_RED_ZONE
127#else
128#define ORANGEFS_CACHE_CREATE_FLAGS 0
129#endif /* ((defined ORANGEFS_KERNEL_DEBUG) && (defined CONFIG_DEBUG_SLAB)) */
130
131#define ORANGEFS_GFP_FLAGS (GFP_KERNEL)
132#define ORANGEFS_BUFMAP_GFP_FLAGS (GFP_KERNEL)
133
134/* orangefs xattr and acl related defines */
135#define ORANGEFS_XATTR_INDEX_POSIX_ACL_ACCESS 1
136#define ORANGEFS_XATTR_INDEX_POSIX_ACL_DEFAULT 2
137#define ORANGEFS_XATTR_INDEX_TRUSTED 3
138#define ORANGEFS_XATTR_INDEX_DEFAULT 4
139
140#define ORANGEFS_XATTR_NAME_ACL_ACCESS XATTR_NAME_POSIX_ACL_ACCESS
141#define ORANGEFS_XATTR_NAME_ACL_DEFAULT XATTR_NAME_POSIX_ACL_DEFAULT
142#define ORANGEFS_XATTR_NAME_TRUSTED_PREFIX "trusted."
143#define ORANGEFS_XATTR_NAME_DEFAULT_PREFIX ""
144
145/* these functions are defined in orangefs-utils.c */
146int orangefs_prepare_cdm_array(char *debug_array_string);
147int orangefs_prepare_debugfs_help_string(int);
148
149/* defined in orangefs-debugfs.c */
150int orangefs_client_debug_init(void);
151
152void debug_string_to_mask(char *, void *, int);
153void do_c_mask(int, char *, struct client_debug_mask **);
154void do_k_mask(int, char *, __u64 **);
155
156void debug_mask_to_string(void *, int);
157void do_k_string(void *, int);
158void do_c_string(void *, int);
159int check_amalgam_keyword(void *, int);
160int keyword_is_amalgam(char *);
161
162/*these variables are defined in orangefs-mod.c */
163extern char kernel_debug_string[ORANGEFS_MAX_DEBUG_STRING_LEN];
164extern char client_debug_string[ORANGEFS_MAX_DEBUG_STRING_LEN];
165extern char client_debug_array_string[ORANGEFS_MAX_DEBUG_STRING_LEN];
166extern unsigned int kernel_mask_set_mod_init;
167
168extern int orangefs_init_acl(struct inode *inode, struct inode *dir);
169extern const struct xattr_handler *orangefs_xattr_handlers[];
170
171extern struct posix_acl *orangefs_get_acl(struct inode *inode, int type);
172extern int orangefs_set_acl(struct inode *inode, struct posix_acl *acl, int type);
173
174/*
175 * Redefine xtvec structure so that we could move helper functions out of
176 * the define
177 */
178struct xtvec {
179 __kernel_off_t xtv_off; /* must be off_t */
180 __kernel_size_t xtv_len; /* must be size_t */
181};
182
183/*
184 * orangefs data structures
185 */
186struct orangefs_kernel_op_s {
187 enum orangefs_vfs_op_states op_state;
188 __u64 tag;
189
190 /*
191 * Set uses_shared_memory to 1 if this operation uses shared memory.
192 * If true, then a retry on the op must also get a new shared memory
193 * buffer and re-populate it.
194 */
195 int uses_shared_memory;
196
197 struct orangefs_upcall_s upcall;
198 struct orangefs_downcall_s downcall;
199
200 wait_queue_head_t waitq;
201 spinlock_t lock;
202
203 struct completion done;
204
205 atomic_t ref_count;
206
207 /* VFS aio fields */
208
209 int attempts;
210
211 struct list_head list;
212};
213
214#define set_op_state_waiting(op) ((op)->op_state = OP_VFS_STATE_WAITING)
215#define set_op_state_inprogress(op) ((op)->op_state = OP_VFS_STATE_INPROGR)
216#define set_op_state_given_up(op) ((op)->op_state = OP_VFS_STATE_GIVEN_UP)
217static inline void set_op_state_serviced(struct orangefs_kernel_op_s *op)
218{
219 op->op_state = OP_VFS_STATE_SERVICED;
220 wake_up_interruptible(&op->waitq);
221}
222static inline void set_op_state_purged(struct orangefs_kernel_op_s *op)
223{
224 op->op_state |= OP_VFS_STATE_PURGED;
225 wake_up_interruptible(&op->waitq);
226}
227
228#define op_state_waiting(op) ((op)->op_state & OP_VFS_STATE_WAITING)
229#define op_state_in_progress(op) ((op)->op_state & OP_VFS_STATE_INPROGR)
230#define op_state_serviced(op) ((op)->op_state & OP_VFS_STATE_SERVICED)
231#define op_state_purged(op) ((op)->op_state & OP_VFS_STATE_PURGED)
232#define op_state_given_up(op) ((op)->op_state & OP_VFS_STATE_GIVEN_UP)
233
234static inline void get_op(struct orangefs_kernel_op_s *op)
235{
236 atomic_inc(&op->ref_count);
237 gossip_debug(GOSSIP_DEV_DEBUG,
238 "(get) Alloced OP (%p:%llu)\n", op, llu(op->tag));
239}
240
241void __op_release(struct orangefs_kernel_op_s *op);
242
243static inline void op_release(struct orangefs_kernel_op_s *op)
244{
245 if (atomic_dec_and_test(&op->ref_count)) {
246 gossip_debug(GOSSIP_DEV_DEBUG,
247 "(put) Releasing OP (%p:%llu)\n", op, llu((op)->tag));
248 __op_release(op);
249 }
250}
251
252/* per inode private orangefs info */
253struct orangefs_inode_s {
254 struct orangefs_object_kref refn;
255 char link_target[ORANGEFS_NAME_MAX];
256 __s64 blksize;
257 /*
258 * Reading/Writing Extended attributes need to acquire the appropriate
259 * reader/writer semaphore on the orangefs_inode_s structure.
260 */
261 struct rw_semaphore xattr_sem;
262
263 struct inode vfs_inode;
264 sector_t last_failed_block_index_read;
265
266 /*
267 * State of in-memory attributes not yet flushed to disk associated
268 * with this object
269 */
270 unsigned long pinode_flags;
271};
272
273#define P_ATIME_FLAG 0
274#define P_MTIME_FLAG 1
275#define P_CTIME_FLAG 2
276#define P_MODE_FLAG 3
277
278#define ClearAtimeFlag(pinode) clear_bit(P_ATIME_FLAG, &(pinode)->pinode_flags)
279#define SetAtimeFlag(pinode) set_bit(P_ATIME_FLAG, &(pinode)->pinode_flags)
280#define AtimeFlag(pinode) test_bit(P_ATIME_FLAG, &(pinode)->pinode_flags)
281
282#define ClearMtimeFlag(pinode) clear_bit(P_MTIME_FLAG, &(pinode)->pinode_flags)
283#define SetMtimeFlag(pinode) set_bit(P_MTIME_FLAG, &(pinode)->pinode_flags)
284#define MtimeFlag(pinode) test_bit(P_MTIME_FLAG, &(pinode)->pinode_flags)
285
286#define ClearCtimeFlag(pinode) clear_bit(P_CTIME_FLAG, &(pinode)->pinode_flags)
287#define SetCtimeFlag(pinode) set_bit(P_CTIME_FLAG, &(pinode)->pinode_flags)
288#define CtimeFlag(pinode) test_bit(P_CTIME_FLAG, &(pinode)->pinode_flags)
289
290#define ClearModeFlag(pinode) clear_bit(P_MODE_FLAG, &(pinode)->pinode_flags)
291#define SetModeFlag(pinode) set_bit(P_MODE_FLAG, &(pinode)->pinode_flags)
292#define ModeFlag(pinode) test_bit(P_MODE_FLAG, &(pinode)->pinode_flags)
293
294/* per superblock private orangefs info */
295struct orangefs_sb_info_s {
296 struct orangefs_khandle root_khandle;
297 __s32 fs_id;
298 int id;
299 int flags;
300#define ORANGEFS_OPT_INTR 0x01
301#define ORANGEFS_OPT_LOCAL_LOCK 0x02
302 char devname[ORANGEFS_MAX_SERVER_ADDR_LEN];
303 struct super_block *sb;
304 int mount_pending;
305 struct list_head list;
306};
307
308/*
309 * structure that holds the state of any async I/O operation issued
310 * through the VFS. Needed especially to handle cancellation requests
311 * or even completion notification so that the VFS client-side daemon
312 * can free up its vfs_request slots.
313 */
314struct orangefs_kiocb_s {
315 /* the pointer to the task that initiated the AIO */
316 struct task_struct *tsk;
317
318 /* pointer to the kiocb that kicked this operation */
319 struct kiocb *kiocb;
320
321 /* buffer index that was used for the I/O */
322 struct orangefs_bufmap *bufmap;
323 int buffer_index;
324
325 /* orangefs kernel operation type */
326 struct orangefs_kernel_op_s *op;
327
328 /* The user space buffers from/to which I/O is being staged */
329 struct iovec *iov;
330
331 /* number of elements in the iovector */
332 unsigned long nr_segs;
333
334 /* set to indicate the type of the operation */
335 int rw;
336
337 /* file offset */
338 loff_t offset;
339
340 /* and the count in bytes */
341 size_t bytes_to_be_copied;
342
343 ssize_t bytes_copied;
344 int needs_cleanup;
345};
346
347struct orangefs_stats {
348 unsigned long cache_hits;
349 unsigned long cache_misses;
350 unsigned long reads;
351 unsigned long writes;
352};
353
354extern struct orangefs_stats g_orangefs_stats;
355
356/*
357 * NOTE: See Documentation/filesystems/porting for information
358 * on implementing FOO_I and properly accessing fs private data
359 */
360static inline struct orangefs_inode_s *ORANGEFS_I(struct inode *inode)
361{
362 return container_of(inode, struct orangefs_inode_s, vfs_inode);
363}
364
365static inline struct orangefs_sb_info_s *ORANGEFS_SB(struct super_block *sb)
366{
367 return (struct orangefs_sb_info_s *) sb->s_fs_info;
368}
369
370/* ino_t descends from "unsigned long", 8 bytes, 64 bits. */
371static inline ino_t orangefs_khandle_to_ino(struct orangefs_khandle *khandle)
372{
373 union {
374 unsigned char u[8];
375 __u64 ino;
376 } ihandle;
377
378 ihandle.u[0] = khandle->u[0] ^ khandle->u[4];
379 ihandle.u[1] = khandle->u[1] ^ khandle->u[5];
380 ihandle.u[2] = khandle->u[2] ^ khandle->u[6];
381 ihandle.u[3] = khandle->u[3] ^ khandle->u[7];
382 ihandle.u[4] = khandle->u[12] ^ khandle->u[8];
383 ihandle.u[5] = khandle->u[13] ^ khandle->u[9];
384 ihandle.u[6] = khandle->u[14] ^ khandle->u[10];
385 ihandle.u[7] = khandle->u[15] ^ khandle->u[11];
386
387 return ihandle.ino;
388}
389
390static inline struct orangefs_khandle *get_khandle_from_ino(struct inode *inode)
391{
392 return &(ORANGEFS_I(inode)->refn.khandle);
393}
394
395static inline __s32 get_fsid_from_ino(struct inode *inode)
396{
397 return ORANGEFS_I(inode)->refn.fs_id;
398}
399
400static inline ino_t get_ino_from_khandle(struct inode *inode)
401{
402 struct orangefs_khandle *khandle;
403 ino_t ino;
404
405 khandle = get_khandle_from_ino(inode);
406 ino = orangefs_khandle_to_ino(khandle);
407 return ino;
408}
409
410static inline ino_t get_parent_ino_from_dentry(struct dentry *dentry)
411{
412 return get_ino_from_khandle(dentry->d_parent->d_inode);
413}
414
415static inline int is_root_handle(struct inode *inode)
416{
417 gossip_debug(GOSSIP_DCACHE_DEBUG,
418 "%s: root handle: %pU, this handle: %pU:\n",
419 __func__,
420 &ORANGEFS_SB(inode->i_sb)->root_khandle,
421 get_khandle_from_ino(inode));
422
423 if (ORANGEFS_khandle_cmp(&(ORANGEFS_SB(inode->i_sb)->root_khandle),
424 get_khandle_from_ino(inode)))
425 return 0;
426 else
427 return 1;
428}
429
430static inline int match_handle(struct orangefs_khandle resp_handle,
431 struct inode *inode)
432{
433 gossip_debug(GOSSIP_DCACHE_DEBUG,
434 "%s: one handle: %pU, another handle:%pU:\n",
435 __func__,
436 &resp_handle,
437 get_khandle_from_ino(inode));
438
439 if (ORANGEFS_khandle_cmp(&resp_handle, get_khandle_from_ino(inode)))
440 return 0;
441 else
442 return 1;
443}
444
445/*
446 * defined in orangefs-cache.c
447 */
448int op_cache_initialize(void);
449int op_cache_finalize(void);
450struct orangefs_kernel_op_s *op_alloc(__s32 type);
451char *get_opname_string(struct orangefs_kernel_op_s *new_op);
452
453int orangefs_inode_cache_initialize(void);
454int orangefs_inode_cache_finalize(void);
455
456/*
457 * defined in orangefs-mod.c
458 */
459void purge_inprogress_ops(void);
460
461/*
462 * defined in waitqueue.c
463 */
464void purge_waiting_ops(void);
465
466/*
467 * defined in super.c
468 */
469struct dentry *orangefs_mount(struct file_system_type *fst,
470 int flags,
471 const char *devname,
472 void *data);
473
474void orangefs_kill_sb(struct super_block *sb);
475int orangefs_remount(struct super_block *sb);
476
477int fsid_key_table_initialize(void);
478void fsid_key_table_finalize(void);
479
480/*
481 * defined in inode.c
482 */
483__u32 convert_to_orangefs_mask(unsigned long lite_mask);
484struct inode *orangefs_new_inode(struct super_block *sb,
485 struct inode *dir,
486 int mode,
487 dev_t dev,
488 struct orangefs_object_kref *ref);
489
490int orangefs_setattr(struct dentry *dentry, struct iattr *iattr);
491
492int orangefs_getattr(struct vfsmount *mnt,
493 struct dentry *dentry,
494 struct kstat *kstat);
495
496int orangefs_permission(struct inode *inode, int mask);
497
498/*
499 * defined in xattr.c
500 */
501int orangefs_setxattr(struct dentry *dentry,
502 const char *name,
503 const void *value,
504 size_t size,
505 int flags);
506
507ssize_t orangefs_getxattr(struct dentry *dentry,
508 const char *name,
509 void *buffer,
510 size_t size);
511
512ssize_t orangefs_listxattr(struct dentry *dentry, char *buffer, size_t size);
513
514/*
515 * defined in namei.c
516 */
517struct inode *orangefs_iget(struct super_block *sb,
518 struct orangefs_object_kref *ref);
519
520ssize_t orangefs_inode_read(struct inode *inode,
521 struct iov_iter *iter,
522 loff_t *offset,
523 loff_t readahead_size);
524
525/*
526 * defined in devorangefs-req.c
527 */
528int orangefs_dev_init(void);
529void orangefs_dev_cleanup(void);
530int is_daemon_in_service(void);
531int fs_mount_pending(__s32 fsid);
532
533/*
534 * defined in orangefs-utils.c
535 */
536__s32 fsid_of_op(struct orangefs_kernel_op_s *op);
537
538int orangefs_flush_inode(struct inode *inode);
539
540ssize_t orangefs_inode_getxattr(struct inode *inode,
541 const char *prefix,
542 const char *name,
543 void *buffer,
544 size_t size);
545
546int orangefs_inode_setxattr(struct inode *inode,
547 const char *prefix,
548 const char *name,
549 const void *value,
550 size_t size,
551 int flags);
552
553int orangefs_inode_getattr(struct inode *inode, __u32 mask, int check);
554
555int orangefs_inode_setattr(struct inode *inode, struct iattr *iattr);
556
557void orangefs_make_bad_inode(struct inode *inode);
558
559void orangefs_block_signals(sigset_t *);
560
561void orangefs_set_signals(sigset_t *);
562
563int orangefs_unmount_sb(struct super_block *sb);
564
565int orangefs_cancel_op_in_progress(__u64 tag);
566
567static inline __u64 orangefs_convert_time_field(const struct timespec *ts)
568{
569 return (__u64)ts->tv_sec;
570}
571
572int orangefs_normalize_to_errno(__s32 error_code);
573
574extern struct mutex devreq_mutex;
575extern struct mutex request_mutex;
576extern int debug;
577extern int op_timeout_secs;
578extern int slot_timeout_secs;
579extern struct list_head orangefs_superblocks;
580extern spinlock_t orangefs_superblocks_lock;
581extern struct list_head orangefs_request_list;
582extern spinlock_t orangefs_request_list_lock;
583extern wait_queue_head_t orangefs_request_list_waitq;
584extern struct list_head *htable_ops_in_progress;
585extern spinlock_t htable_ops_in_progress_lock;
586extern int hash_table_size;
587
588extern const struct address_space_operations orangefs_address_operations;
589extern struct backing_dev_info orangefs_backing_dev_info;
590extern struct inode_operations orangefs_file_inode_operations;
591extern const struct file_operations orangefs_file_operations;
592extern struct inode_operations orangefs_symlink_inode_operations;
593extern struct inode_operations orangefs_dir_inode_operations;
594extern const struct file_operations orangefs_dir_operations;
595extern const struct dentry_operations orangefs_dentry_operations;
596extern const struct file_operations orangefs_devreq_file_operations;
597
598extern wait_queue_head_t orangefs_bufmap_init_waitq;
599
600/*
601 * misc convenience macros
602 */
603
604#define ORANGEFS_OP_INTERRUPTIBLE 1 /* service_operation() is interruptible */
605#define ORANGEFS_OP_PRIORITY 2 /* service_operation() is high priority */
606#define ORANGEFS_OP_CANCELLATION 4 /* this is a cancellation */
607#define ORANGEFS_OP_NO_SEMAPHORE 8 /* don't acquire semaphore */
608#define ORANGEFS_OP_ASYNC 16 /* Queue it, but don't wait */
609
610int service_operation(struct orangefs_kernel_op_s *op,
611 const char *op_name,
612 int flags);
613
614#define get_interruptible_flag(inode) \
615 ((ORANGEFS_SB(inode->i_sb)->flags & ORANGEFS_OPT_INTR) ? \
616 ORANGEFS_OP_INTERRUPTIBLE : 0)
617
618#define add_orangefs_sb(sb) \
619do { \
620 gossip_debug(GOSSIP_SUPER_DEBUG, \
621 "Adding SB %p to orangefs superblocks\n", \
622 ORANGEFS_SB(sb)); \
623 spin_lock(&orangefs_superblocks_lock); \
624 list_add_tail(&ORANGEFS_SB(sb)->list, &orangefs_superblocks); \
625 spin_unlock(&orangefs_superblocks_lock); \
626} while (0)
627
628#define remove_orangefs_sb(sb) \
629do { \
630 struct list_head *tmp = NULL; \
631 struct list_head *tmp_safe = NULL; \
632 struct orangefs_sb_info_s *orangefs_sb = NULL; \
633 \
634 spin_lock(&orangefs_superblocks_lock); \
635 list_for_each_safe(tmp, tmp_safe, &orangefs_superblocks) { \
636 orangefs_sb = list_entry(tmp, \
637 struct orangefs_sb_info_s, \
638 list); \
639 if (orangefs_sb && (orangefs_sb->sb == sb)) { \
640 gossip_debug(GOSSIP_SUPER_DEBUG, \
641 "Removing SB %p from orangefs superblocks\n", \
642 orangefs_sb); \
643 list_del(&orangefs_sb->list); \
644 break; \
645 } \
646 } \
647 spin_unlock(&orangefs_superblocks_lock); \
648} while (0)
649
650#define orangefs_lock_inode(inode) spin_lock(&inode->i_lock)
651#define orangefs_unlock_inode(inode) spin_unlock(&inode->i_lock)
652
653#define fill_default_sys_attrs(sys_attr, type, mode) \
654do { \
655 sys_attr.owner = from_kuid(current_user_ns(), current_fsuid()); \
656 sys_attr.group = from_kgid(current_user_ns(), current_fsgid()); \
657 sys_attr.size = 0; \
658 sys_attr.perms = ORANGEFS_util_translate_mode(mode); \
659 sys_attr.objtype = type; \
660 sys_attr.mask = ORANGEFS_ATTR_SYS_ALL_SETABLE; \
661} while (0)
662
663#define orangefs_inode_lock(__i) mutex_lock(&(__i)->i_mutex)
664
665#define orangefs_inode_unlock(__i) mutex_unlock(&(__i)->i_mutex)
666
667static inline void orangefs_i_size_write(struct inode *inode, loff_t i_size)
668{
669#if BITS_PER_LONG == 32 && defined(CONFIG_SMP)
670 orangefs_inode_lock(inode);
671#endif
672 i_size_write(inode, i_size);
673#if BITS_PER_LONG == 32 && defined(CONFIG_SMP)
674 orangefs_inode_unlock(inode);
675#endif
676}
677
678static inline unsigned int diff(struct timeval *end, struct timeval *begin)
679{
680 if (end->tv_usec < begin->tv_usec) {
681 end->tv_usec += 1000000;
682 end->tv_sec--;
683 }
684 end->tv_sec -= begin->tv_sec;
685 end->tv_usec -= begin->tv_usec;
686 return (end->tv_sec * 1000000) + end->tv_usec;
687}
688
689#endif /* __ORANGEFSKERNEL_H */
Linux kernel - Deliverables
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