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