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