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  * Defines for controlling whether I/O upcalls are for async or sync operations
 105  */
 106 enum 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  */
 115 struct 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 */
 146 int orangefs_prepare_cdm_array(char *debug_array_string);
 147 int orangefs_prepare_debugfs_help_string(int);
 148
 149 /* defined in orangefs-debugfs.c */
 150 int orangefs_client_debug_init(void);
 151
 152 void debug_string_to_mask(char *, void *, int);
 153 void do_c_mask(int, char *, struct client_debug_mask **);
 154 void do_k_mask(int, char *, __u64 **);
 155
 156 void debug_mask_to_string(void *, int);
 157 void do_k_string(void *, int);
 158 void do_c_string(void *, int);
 159 int check_amalgam_keyword(void *, int);
 160 int keyword_is_amalgam(char *);
 161
 162 /*these variables are defined in orangefs-mod.c */
 163 extern char kernel_debug_string[ORANGEFS_MAX_DEBUG_STRING_LEN];
 164 extern char client_debug_string[ORANGEFS_MAX_DEBUG_STRING_LEN];
 165 extern char client_debug_array_string[ORANGEFS_MAX_DEBUG_STRING_LEN];
 166 extern unsigned int kernel_mask_set_mod_init;
 167
 168 extern int orangefs_init_acl(struct inode *inode, struct inode *dir);
 169 extern const struct xattr_handler *orangefs_xattr_handlers[];
 170
 171 extern struct posix_acl *orangefs_get_acl(struct inode *inode, int type);
 172 extern 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  */
 178 struct 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  */
 186 struct 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.  Cancels don't care - it only matters
 194          * for service_operation() retry logics and cancels don't go through
 195          * it anymore.
 196          */
 197         union {
 198                 int uses_shared_memory;
 199                 int slot_to_free;
 200         };
 201
 202         struct orangefs_upcall_s upcall;
 203         struct orangefs_downcall_s downcall;
 204
 205         struct completion waitq;
 206         spinlock_t lock;
 207
 208         atomic_t ref_count;
 209
 210         /* VFS aio fields */
 211
 212         int attempts;
 213
 214         struct list_head list;
 215 };
 216
 217 #define set_op_state_waiting(op)     ((op)->op_state = OP_VFS_STATE_WAITING)
 218 #define set_op_state_inprogress(op)  ((op)->op_state = OP_VFS_STATE_INPROGR)
 219 #define set_op_state_given_up(op)  ((op)->op_state = OP_VFS_STATE_GIVEN_UP)
 220 static inline void set_op_state_serviced(struct orangefs_kernel_op_s *op)
 221 {
 222         op->op_state = OP_VFS_STATE_SERVICED;
 223         complete(&op->waitq);
 224 }
 225
 226 #define op_state_waiting(op)     ((op)->op_state & OP_VFS_STATE_WAITING)
 227 #define op_state_in_progress(op) ((op)->op_state & OP_VFS_STATE_INPROGR)
 228 #define op_state_serviced(op)    ((op)->op_state & OP_VFS_STATE_SERVICED)
 229 #define op_state_purged(op)      ((op)->op_state & OP_VFS_STATE_PURGED)
 230 #define op_state_given_up(op)    ((op)->op_state & OP_VFS_STATE_GIVEN_UP)
 231 #define op_is_cancel(op)         ((op)->upcall.type == ORANGEFS_VFS_OP_CANCEL)
 232
 233 static inline void get_op(struct orangefs_kernel_op_s *op)
 234 {
 235         atomic_inc(&op->ref_count);
 236         gossip_debug(GOSSIP_DEV_DEBUG,
 237                         "(get) Alloced OP (%p:%llu)\n", op, llu(op->tag));
 238 }
 239
 240 void __op_release(struct orangefs_kernel_op_s *op);
 241
 242 static inline void op_release(struct orangefs_kernel_op_s *op)
 243 {
 244         if (atomic_dec_and_test(&op->ref_count)) {
 245                 gossip_debug(GOSSIP_DEV_DEBUG,
 246                         "(put) Releasing OP (%p:%llu)\n", op, llu((op)->tag));
 247                 __op_release(op);
 248         }
 249 }
 250
 251 extern void orangefs_bufmap_put(int);
 252 static inline void put_cancel(struct orangefs_kernel_op_s *op)
 253 {
 254         orangefs_bufmap_put(op->slot_to_free);
 255         op_release(op);
 256 }
 257
 258 static inline void set_op_state_purged(struct orangefs_kernel_op_s *op)
 259 {
 260         spin_lock(&op->lock);
 261         if (unlikely(op_is_cancel(op))) {
 262                 list_del(&op->list);
 263                 spin_unlock(&op->lock);
 264                 put_cancel(op);
 265         } else {
 266                 op->op_state |= OP_VFS_STATE_PURGED;
 267                 complete(&op->waitq);
 268                 spin_unlock(&op->lock);
 269         }
 270 }
 271
 272 /* per inode private orangefs info */
 273 struct orangefs_inode_s {
 274         struct orangefs_object_kref refn;
 275         char link_target[ORANGEFS_NAME_MAX];
 276         __s64 blksize;
 277         /*
 278          * Reading/Writing Extended attributes need to acquire the appropriate
 279          * reader/writer semaphore on the orangefs_inode_s structure.
 280          */
 281         struct rw_semaphore xattr_sem;
 282
 283         struct inode vfs_inode;
 284         sector_t last_failed_block_index_read;
 285
 286         /*
 287          * State of in-memory attributes not yet flushed to disk associated
 288          * with this object
 289          */
 290         unsigned long pinode_flags;
 291 };
 292
 293 #define P_ATIME_FLAG 0
 294 #define P_MTIME_FLAG 1
 295 #define P_CTIME_FLAG 2
 296 #define P_MODE_FLAG  3
 297
 298 #define ClearAtimeFlag(pinode) clear_bit(P_ATIME_FLAG, &(pinode)->pinode_flags)
 299 #define SetAtimeFlag(pinode)   set_bit(P_ATIME_FLAG, &(pinode)->pinode_flags)
 300 #define AtimeFlag(pinode)      test_bit(P_ATIME_FLAG, &(pinode)->pinode_flags)
 301
 302 #define ClearMtimeFlag(pinode) clear_bit(P_MTIME_FLAG, &(pinode)->pinode_flags)
 303 #define SetMtimeFlag(pinode)   set_bit(P_MTIME_FLAG, &(pinode)->pinode_flags)
 304 #define MtimeFlag(pinode)      test_bit(P_MTIME_FLAG, &(pinode)->pinode_flags)
 305
 306 #define ClearCtimeFlag(pinode) clear_bit(P_CTIME_FLAG, &(pinode)->pinode_flags)
 307 #define SetCtimeFlag(pinode)   set_bit(P_CTIME_FLAG, &(pinode)->pinode_flags)
 308 #define CtimeFlag(pinode)      test_bit(P_CTIME_FLAG, &(pinode)->pinode_flags)
 309
 310 #define ClearModeFlag(pinode) clear_bit(P_MODE_FLAG, &(pinode)->pinode_flags)
 311 #define SetModeFlag(pinode)   set_bit(P_MODE_FLAG, &(pinode)->pinode_flags)
 312 #define ModeFlag(pinode)      test_bit(P_MODE_FLAG, &(pinode)->pinode_flags)
 313
 314 /* per superblock private orangefs info */
 315 struct orangefs_sb_info_s {
 316         struct orangefs_khandle root_khandle;
 317         __s32 fs_id;
 318         int id;
 319         int flags;
 320 #define ORANGEFS_OPT_INTR       0x01
 321 #define ORANGEFS_OPT_LOCAL_LOCK 0x02
 322         char devname[ORANGEFS_MAX_SERVER_ADDR_LEN];
 323         struct super_block *sb;
 324         int mount_pending;
 325         struct list_head list;
 326 };
 327
 328 /*
 329  * structure that holds the state of any async I/O operation issued
 330  * through the VFS. Needed especially to handle cancellation requests
 331  * or even completion notification so that the VFS client-side daemon
 332  * can free up its vfs_request slots.
 333  */
 334 struct orangefs_kiocb_s {
 335         /* the pointer to the task that initiated the AIO */
 336         struct task_struct *tsk;
 337
 338         /* pointer to the kiocb that kicked this operation */
 339         struct kiocb *kiocb;
 340
 341         /* buffer index that was used for the I/O */
 342         struct orangefs_bufmap *bufmap;
 343         int buffer_index;
 344
 345         /* orangefs kernel operation type */
 346         struct orangefs_kernel_op_s *op;
 347
 348         /* The user space buffers from/to which I/O is being staged */
 349         struct iovec *iov;
 350
 351         /* number of elements in the iovector */
 352         unsigned long nr_segs;
 353
 354         /* set to indicate the type of the operation */
 355         int rw;
 356
 357         /* file offset */
 358         loff_t offset;
 359
 360         /* and the count in bytes */
 361         size_t bytes_to_be_copied;
 362
 363         ssize_t bytes_copied;
 364         int needs_cleanup;
 365 };
 366
 367 struct orangefs_stats {
 368         unsigned long cache_hits;
 369         unsigned long cache_misses;
 370         unsigned long reads;
 371         unsigned long writes;
 372 };
 373
 374 extern struct orangefs_stats g_orangefs_stats;
 375
 376 /*
 377  * NOTE: See Documentation/filesystems/porting for information
 378  * on implementing FOO_I and properly accessing fs private data
 379  */
 380 static inline struct orangefs_inode_s *ORANGEFS_I(struct inode *inode)
 381 {
 382         return container_of(inode, struct orangefs_inode_s, vfs_inode);
 383 }
 384
 385 static inline struct orangefs_sb_info_s *ORANGEFS_SB(struct super_block *sb)
 386 {
 387         return (struct orangefs_sb_info_s *) sb->s_fs_info;
 388 }
 389
 390 /* ino_t descends from "unsigned long", 8 bytes, 64 bits. */
 391 static inline ino_t orangefs_khandle_to_ino(struct orangefs_khandle *khandle)
 392 {
 393         union {
 394                 unsigned char u[8];
 395                 __u64 ino;
 396         } ihandle;
 397
 398         ihandle.u[0] = khandle->u[0] ^ khandle->u[4];
 399         ihandle.u[1] = khandle->u[1] ^ khandle->u[5];
 400         ihandle.u[2] = khandle->u[2] ^ khandle->u[6];
 401         ihandle.u[3] = khandle->u[3] ^ khandle->u[7];
 402         ihandle.u[4] = khandle->u[12] ^ khandle->u[8];
 403         ihandle.u[5] = khandle->u[13] ^ khandle->u[9];
 404         ihandle.u[6] = khandle->u[14] ^ khandle->u[10];
 405         ihandle.u[7] = khandle->u[15] ^ khandle->u[11];
 406
 407         return ihandle.ino;
 408 }
 409
 410 static inline struct orangefs_khandle *get_khandle_from_ino(struct inode *inode)
 411 {
 412         return &(ORANGEFS_I(inode)->refn.khandle);
 413 }
 414
 415 static inline __s32 get_fsid_from_ino(struct inode *inode)
 416 {
 417         return ORANGEFS_I(inode)->refn.fs_id;
 418 }
 419
 420 static inline ino_t get_ino_from_khandle(struct inode *inode)
 421 {
 422         struct orangefs_khandle *khandle;
 423         ino_t ino;
 424
 425         khandle = get_khandle_from_ino(inode);
 426         ino = orangefs_khandle_to_ino(khandle);
 427         return ino;
 428 }
 429
 430 static inline ino_t get_parent_ino_from_dentry(struct dentry *dentry)
 431 {
 432         return get_ino_from_khandle(dentry->d_parent->d_inode);
 433 }
 434
 435 static inline int is_root_handle(struct inode *inode)
 436 {
 437         gossip_debug(GOSSIP_DCACHE_DEBUG,
 438                      "%s: root handle: %pU, this handle: %pU:\n",
 439                      __func__,
 440                      &ORANGEFS_SB(inode->i_sb)->root_khandle,
 441                      get_khandle_from_ino(inode));
 442
 443         if (ORANGEFS_khandle_cmp(&(ORANGEFS_SB(inode->i_sb)->root_khandle),
 444                              get_khandle_from_ino(inode)))
 445                 return 0;
 446         else
 447                 return 1;
 448 }
 449
 450 static inline int match_handle(struct orangefs_khandle resp_handle,
 451                                struct inode *inode)
 452 {
 453         gossip_debug(GOSSIP_DCACHE_DEBUG,
 454                      "%s: one handle: %pU, another handle:%pU:\n",
 455                      __func__,
 456                      &resp_handle,
 457                      get_khandle_from_ino(inode));
 458
 459         if (ORANGEFS_khandle_cmp(&resp_handle, get_khandle_from_ino(inode)))
 460                 return 0;
 461         else
 462                 return 1;
 463 }
 464
 465 /*
 466  * defined in orangefs-cache.c
 467  */
 468 int op_cache_initialize(void);
 469 int op_cache_finalize(void);
 470 struct orangefs_kernel_op_s *op_alloc(__s32 type);
 471 void orangefs_new_tag(struct orangefs_kernel_op_s *op);
 472 char *get_opname_string(struct orangefs_kernel_op_s *new_op);
 473
 474 int orangefs_inode_cache_initialize(void);
 475 int orangefs_inode_cache_finalize(void);
 476
 477 /*
 478  * defined in orangefs-mod.c
 479  */
 480 void purge_inprogress_ops(void);
 481
 482 /*
 483  * defined in waitqueue.c
 484  */
 485 void purge_waiting_ops(void);
 486
 487 /*
 488  * defined in super.c
 489  */
 490 struct dentry *orangefs_mount(struct file_system_type *fst,
 491                            int flags,
 492                            const char *devname,
 493                            void *data);
 494
 495 void orangefs_kill_sb(struct super_block *sb);
 496 int orangefs_remount(struct super_block *sb);
 497
 498 int fsid_key_table_initialize(void);
 499 void fsid_key_table_finalize(void);
 500
 501 /*
 502  * defined in inode.c
 503  */
 504 __u32 convert_to_orangefs_mask(unsigned long lite_mask);
 505 struct inode *orangefs_new_inode(struct super_block *sb,
 506                               struct inode *dir,
 507                               int mode,
 508                               dev_t dev,
 509                               struct orangefs_object_kref *ref);
 510
 511 int orangefs_setattr(struct dentry *dentry, struct iattr *iattr);
 512
 513 int orangefs_getattr(struct vfsmount *mnt,
 514                   struct dentry *dentry,
 515                   struct kstat *kstat);
 516
 517 int orangefs_permission(struct inode *inode, int mask);
 518
 519 /*
 520  * defined in xattr.c
 521  */
 522 int orangefs_setxattr(struct dentry *dentry,
 523                    const char *name,
 524                    const void *value,
 525                    size_t size,
 526                    int flags);
 527
 528 ssize_t orangefs_getxattr(struct dentry *dentry,
 529                        const char *name,
 530                        void *buffer,
 531                        size_t size);
 532
 533 ssize_t orangefs_listxattr(struct dentry *dentry, char *buffer, size_t size);
 534
 535 /*
 536  * defined in namei.c
 537  */
 538 struct inode *orangefs_iget(struct super_block *sb,
 539                          struct orangefs_object_kref *ref);
 540
 541 ssize_t orangefs_inode_read(struct inode *inode,
 542                             struct iov_iter *iter,
 543                             loff_t *offset,
 544                             loff_t readahead_size);
 545
 546 /*
 547  * defined in devorangefs-req.c
 548  */
 549 int orangefs_dev_init(void);
 550 void orangefs_dev_cleanup(void);
 551 int is_daemon_in_service(void);
 552 bool __is_daemon_in_service(void);
 553 int fs_mount_pending(__s32 fsid);
 554
 555 /*
 556  * defined in orangefs-utils.c
 557  */
 558 __s32 fsid_of_op(struct orangefs_kernel_op_s *op);
 559
 560 int orangefs_flush_inode(struct inode *inode);
 561
 562 ssize_t orangefs_inode_getxattr(struct inode *inode,
 563                              const char *prefix,
 564                              const char *name,
 565                              void *buffer,
 566                              size_t size);
 567
 568 int orangefs_inode_setxattr(struct inode *inode,
 569                          const char *prefix,
 570                          const char *name,
 571                          const void *value,
 572                          size_t size,
 573                          int flags);
 574
 575 int orangefs_inode_getattr(struct inode *inode, __u32 mask, int check);
 576
 577 int orangefs_inode_setattr(struct inode *inode, struct iattr *iattr);
 578
 579 void orangefs_make_bad_inode(struct inode *inode);
 580
 581 int orangefs_unmount_sb(struct super_block *sb);
 582
 583 bool orangefs_cancel_op_in_progress(struct orangefs_kernel_op_s *op);
 584
 585 static inline __u64 orangefs_convert_time_field(const struct timespec *ts)
 586 {
 587         return (__u64)ts->tv_sec;
 588 }
 589
 590 int orangefs_normalize_to_errno(__s32 error_code);
 591
 592 extern struct mutex devreq_mutex;
 593 extern struct mutex request_mutex;
 594 extern int debug;
 595 extern int op_timeout_secs;
 596 extern int slot_timeout_secs;
 597 extern struct list_head orangefs_superblocks;
 598 extern spinlock_t orangefs_superblocks_lock;
 599 extern struct list_head orangefs_request_list;
 600 extern spinlock_t orangefs_request_list_lock;
 601 extern wait_queue_head_t orangefs_request_list_waitq;
 602 extern struct list_head *htable_ops_in_progress;
 603 extern spinlock_t htable_ops_in_progress_lock;
 604 extern int hash_table_size;
 605
 606 extern const struct address_space_operations orangefs_address_operations;
 607 extern struct backing_dev_info orangefs_backing_dev_info;
 608 extern struct inode_operations orangefs_file_inode_operations;
 609 extern const struct file_operations orangefs_file_operations;
 610 extern struct inode_operations orangefs_symlink_inode_operations;
 611 extern struct inode_operations orangefs_dir_inode_operations;
 612 extern const struct file_operations orangefs_dir_operations;
 613 extern const struct dentry_operations orangefs_dentry_operations;
 614 extern const struct file_operations orangefs_devreq_file_operations;
 615
 616 extern wait_queue_head_t orangefs_bufmap_init_waitq;
 617
 618 /*
 619  * misc convenience macros
 620  */
 621
 622 #define ORANGEFS_OP_INTERRUPTIBLE 1   /* service_operation() is interruptible */
 623 #define ORANGEFS_OP_PRIORITY      2   /* service_operation() is high priority */
 624 #define ORANGEFS_OP_CANCELLATION  4   /* this is a cancellation */
 625 #define ORANGEFS_OP_NO_SEMAPHORE  8   /* don't acquire semaphore */
 626 #define ORANGEFS_OP_ASYNC         16  /* Queue it, but don't wait */
 627
 628 int service_operation(struct orangefs_kernel_op_s *op,
 629                       const char *op_name,
 630                       int flags);
 631
 632 #define get_interruptible_flag(inode) \
 633         ((ORANGEFS_SB(inode->i_sb)->flags & ORANGEFS_OPT_INTR) ? \
 634                 ORANGEFS_OP_INTERRUPTIBLE : 0)
 635
 636 #define add_orangefs_sb(sb)                                             \
 637 do {                                                                    \
 638         gossip_debug(GOSSIP_SUPER_DEBUG,                                \
 639                      "Adding SB %p to orangefs superblocks\n",          \
 640                      ORANGEFS_SB(sb));                                  \
 641         spin_lock(&orangefs_superblocks_lock);                          \
 642         list_add_tail(&ORANGEFS_SB(sb)->list, &orangefs_superblocks);           \
 643         spin_unlock(&orangefs_superblocks_lock); \
 644 } while (0)
 645
 646 #define remove_orangefs_sb(sb)                                          \
 647 do {                                                                    \
 648         struct list_head *tmp = NULL;                                   \
 649         struct list_head *tmp_safe = NULL;                              \
 650         struct orangefs_sb_info_s *orangefs_sb = NULL;                  \
 651                                                                         \
 652         spin_lock(&orangefs_superblocks_lock);                          \
 653         list_for_each_safe(tmp, tmp_safe, &orangefs_superblocks) {              \
 654                 orangefs_sb = list_entry(tmp,                           \
 655                                       struct orangefs_sb_info_s,                \
 656                                       list);                            \
 657                 if (orangefs_sb && (orangefs_sb->sb == sb)) {                   \
 658                         gossip_debug(GOSSIP_SUPER_DEBUG,                \
 659                             "Removing SB %p from orangefs superblocks\n",       \
 660                         orangefs_sb);                                   \
 661                         list_del(&orangefs_sb->list);                   \
 662                         break;                                          \
 663                 }                                                       \
 664         }                                                               \
 665         spin_unlock(&orangefs_superblocks_lock);                                \
 666 } while (0)
 667
 668 #define orangefs_lock_inode(inode) spin_lock(&inode->i_lock)
 669 #define orangefs_unlock_inode(inode) spin_unlock(&inode->i_lock)
 670
 671 #define fill_default_sys_attrs(sys_attr, type, mode)                    \
 672 do {                                                                    \
 673         sys_attr.owner = from_kuid(current_user_ns(), current_fsuid()); \
 674         sys_attr.group = from_kgid(current_user_ns(), current_fsgid()); \
 675         sys_attr.size = 0;                                              \
 676         sys_attr.perms = ORANGEFS_util_translate_mode(mode);            \
 677         sys_attr.objtype = type;                                        \
 678         sys_attr.mask = ORANGEFS_ATTR_SYS_ALL_SETABLE;                  \
 679 } while (0)
 680
 681 #define orangefs_inode_lock(__i)  mutex_lock(&(__i)->i_mutex)
 682
 683 #define orangefs_inode_unlock(__i) mutex_unlock(&(__i)->i_mutex)
 684
 685 static inline void orangefs_i_size_write(struct inode *inode, loff_t i_size)
 686 {
 687 #if BITS_PER_LONG == 32 && defined(CONFIG_SMP)
 688         orangefs_inode_lock(inode);
 689 #endif
 690         i_size_write(inode, i_size);
 691 #if BITS_PER_LONG == 32 && defined(CONFIG_SMP)
 692         orangefs_inode_unlock(inode);
 693 #endif
 694 }
 695
 696 static inline unsigned int diff(struct timeval *end, struct timeval *begin)
 697 {
 698         if (end->tv_usec < begin->tv_usec) {
 699                 end->tv_usec += 1000000;
 700                 end->tv_sec--;
 701         }
 702         end->tv_sec -= begin->tv_sec;
 703         end->tv_usec -= begin->tv_usec;
 704         return (end->tv_sec * 1000000) + end->tv_usec;
 705 }
 706
 707 #endif /* __ORANGEFSKERNEL_H */