1 /* 2 FUSE: Filesystem in Userspace 3 Copyright (C) 2001-2008 Miklos Szeredi <miklos@szeredi.hu> 4 5 This program can be distributed under the terms of the GNU GPL. 6 See the file COPYING. 7 */ 8 9 #ifndef _FS_FUSE_I_H 10 #define _FS_FUSE_I_H 11 12 #include <linux/fuse.h> 13 #include <linux/fs.h> 14 #include <linux/mount.h> 15 #include <linux/wait.h> 16 #include <linux/list.h> 17 #include <linux/spinlock.h> 18 #include <linux/mm.h> 19 #include <linux/backing-dev.h> 20 #include <linux/mutex.h> 21 #include <linux/rwsem.h> 22 #include <linux/rbtree.h> 23 #include <linux/poll.h> 24 #include <linux/workqueue.h> 25 26 /** Max number of pages that can be used in a single read request */ 27 #define FUSE_MAX_PAGES_PER_REQ 32 28 29 /** Bias for fi->writectr, meaning new writepages must not be sent */ 30 #define FUSE_NOWRITE INT_MIN 31 32 /** It could be as large as PATH_MAX, but would that have any uses? */ 33 #define FUSE_NAME_MAX 1024 34 35 /** Number of dentries for each connection in the control filesystem */ 36 #define FUSE_CTL_NUM_DENTRIES 5 37 38 /** If the FUSE_DEFAULT_PERMISSIONS flag is given, the filesystem 39 module will check permissions based on the file mode. Otherwise no 40 permission checking is done in the kernel */ 41 #define FUSE_DEFAULT_PERMISSIONS (1 << 0) 42 43 /** If the FUSE_ALLOW_OTHER flag is given, then not only the user 44 doing the mount will be allowed to access the filesystem */ 45 #define FUSE_ALLOW_OTHER (1 << 1) 46 47 /** Number of page pointers embedded in fuse_req */ 48 #define FUSE_REQ_INLINE_PAGES 1 49 50 /** List of active connections */ 51 extern struct list_head fuse_conn_list; 52 53 /** Global mutex protecting fuse_conn_list and the control filesystem */ 54 extern struct mutex fuse_mutex; 55 56 /** Module parameters */ 57 extern unsigned max_user_bgreq; 58 extern unsigned max_user_congthresh; 59 60 /* One forget request */ 61 struct fuse_forget_link { 62 struct fuse_forget_one forget_one; 63 struct fuse_forget_link *next; 64 }; 65 66 /** FUSE inode */ 67 struct fuse_inode { 68 /** Inode data */ 69 struct inode inode; 70 71 /** Unique ID, which identifies the inode between userspace 72 * and kernel */ 73 u64 nodeid; 74 75 /** Number of lookups on this inode */ 76 u64 nlookup; 77 78 /** The request used for sending the FORGET message */ 79 struct fuse_forget_link *forget; 80 81 /** Time in jiffies until the file attributes are valid */ 82 u64 i_time; 83 84 /** The sticky bit in inode->i_mode may have been removed, so 85 preserve the original mode */ 86 umode_t orig_i_mode; 87 88 /** 64 bit inode number */ 89 u64 orig_ino; 90 91 /** Version of last attribute change */ 92 u64 attr_version; 93 94 /** Files usable in writepage. Protected by fc->lock */ 95 struct list_head write_files; 96 97 /** Writepages pending on truncate or fsync */ 98 struct list_head queued_writes; 99 100 /** Number of sent writes, a negative bias (FUSE_NOWRITE) 101 * means more writes are blocked */ 102 int writectr; 103 104 /** Waitq for writepage completion */ 105 wait_queue_head_t page_waitq; 106 107 /** List of writepage requestst (pending or sent) */ 108 struct list_head writepages; 109 110 /** Miscellaneous bits describing inode state */ 111 unsigned long state; 112 }; 113 114 /** FUSE inode state bits */ 115 enum { 116 /** Advise readdirplus */ 117 FUSE_I_ADVISE_RDPLUS, 118 }; 119 120 struct fuse_conn; 121 122 /** FUSE specific file data */ 123 struct fuse_file { 124 /** Fuse connection for this file */ 125 struct fuse_conn *fc; 126 127 /** Request reserved for flush and release */ 128 struct fuse_req *reserved_req; 129 130 /** Kernel file handle guaranteed to be unique */ 131 u64 kh; 132 133 /** File handle used by userspace */ 134 u64 fh; 135 136 /** Node id of this file */ 137 u64 nodeid; 138 139 /** Refcount */ 140 atomic_t count; 141 142 /** FOPEN_* flags returned by open */ 143 u32 open_flags; 144 145 /** Entry on inode's write_files list */ 146 struct list_head write_entry; 147 148 /** RB node to be linked on fuse_conn->polled_files */ 149 struct rb_node polled_node; 150 151 /** Wait queue head for poll */ 152 wait_queue_head_t poll_wait; 153 154 /** Has flock been performed on this file? */ 155 bool flock:1; 156 }; 157 158 /** One input argument of a request */ 159 struct fuse_in_arg { 160 unsigned size; 161 const void *value; 162 }; 163 164 /** The request input */ 165 struct fuse_in { 166 /** The request header */ 167 struct fuse_in_header h; 168 169 /** True if the data for the last argument is in req->pages */ 170 unsigned argpages:1; 171 172 /** Number of arguments */ 173 unsigned numargs; 174 175 /** Array of arguments */ 176 struct fuse_in_arg args[3]; 177 }; 178 179 /** One output argument of a request */ 180 struct fuse_arg { 181 unsigned size; 182 void *value; 183 }; 184 185 /** The request output */ 186 struct fuse_out { 187 /** Header returned from userspace */ 188 struct fuse_out_header h; 189 190 /* 191 * The following bitfields are not changed during the request 192 * processing 193 */ 194 195 /** Last argument is variable length (can be shorter than 196 arg->size) */ 197 unsigned argvar:1; 198 199 /** Last argument is a list of pages to copy data to */ 200 unsigned argpages:1; 201 202 /** Zero partially or not copied pages */ 203 unsigned page_zeroing:1; 204 205 /** Pages may be replaced with new ones */ 206 unsigned page_replace:1; 207 208 /** Number or arguments */ 209 unsigned numargs; 210 211 /** Array of arguments */ 212 struct fuse_arg args[3]; 213 }; 214 215 /** FUSE page descriptor */ 216 struct fuse_page_desc { 217 unsigned int length; 218 unsigned int offset; 219 }; 220 221 /** The request state */ 222 enum fuse_req_state { 223 FUSE_REQ_INIT = 0, 224 FUSE_REQ_PENDING, 225 FUSE_REQ_READING, 226 FUSE_REQ_SENT, 227 FUSE_REQ_WRITING, 228 FUSE_REQ_FINISHED 229 }; 230 231 /** The request IO state (for asynchronous processing) */ 232 struct fuse_io_priv { 233 int async; 234 spinlock_t lock; 235 unsigned reqs; 236 ssize_t bytes; 237 size_t size; 238 __u64 offset; 239 bool write; 240 int err; 241 struct kiocb *iocb; 242 struct file *file; 243 }; 244 245 /** 246 * A request to the client 247 */ 248 struct fuse_req { 249 /** This can be on either pending processing or io lists in 250 fuse_conn */ 251 struct list_head list; 252 253 /** Entry on the interrupts list */ 254 struct list_head intr_entry; 255 256 /** refcount */ 257 atomic_t count; 258 259 /** Unique ID for the interrupt request */ 260 u64 intr_unique; 261 262 /* 263 * The following bitfields are either set once before the 264 * request is queued or setting/clearing them is protected by 265 * fuse_conn->lock 266 */ 267 268 /** True if the request has reply */ 269 unsigned isreply:1; 270 271 /** Force sending of the request even if interrupted */ 272 unsigned force:1; 273 274 /** The request was aborted */ 275 unsigned aborted:1; 276 277 /** Request is sent in the background */ 278 unsigned background:1; 279 280 /** The request has been interrupted */ 281 unsigned interrupted:1; 282 283 /** Data is being copied to/from the request */ 284 unsigned locked:1; 285 286 /** Request is counted as "waiting" */ 287 unsigned waiting:1; 288 289 /** State of the request */ 290 enum fuse_req_state state; 291 292 /** The request input */ 293 struct fuse_in in; 294 295 /** The request output */ 296 struct fuse_out out; 297 298 /** Used to wake up the task waiting for completion of request*/ 299 wait_queue_head_t waitq; 300 301 /** Data for asynchronous requests */ 302 union { 303 struct { 304 union { 305 struct fuse_release_in in; 306 struct work_struct work; 307 }; 308 struct path path; 309 } release; 310 struct fuse_init_in init_in; 311 struct fuse_init_out init_out; 312 struct cuse_init_in cuse_init_in; 313 struct { 314 struct fuse_read_in in; 315 u64 attr_ver; 316 } read; 317 struct { 318 struct fuse_write_in in; 319 struct fuse_write_out out; 320 } write; 321 struct fuse_notify_retrieve_in retrieve_in; 322 struct fuse_lk_in lk_in; 323 } misc; 324 325 /** page vector */ 326 struct page **pages; 327 328 /** page-descriptor vector */ 329 struct fuse_page_desc *page_descs; 330 331 /** size of the 'pages' array */ 332 unsigned max_pages; 333 334 /** inline page vector */ 335 struct page *inline_pages[FUSE_REQ_INLINE_PAGES]; 336 337 /** inline page-descriptor vector */ 338 struct fuse_page_desc inline_page_descs[FUSE_REQ_INLINE_PAGES]; 339 340 /** number of pages in vector */ 341 unsigned num_pages; 342 343 /** File used in the request (or NULL) */ 344 struct fuse_file *ff; 345 346 /** Inode used in the request or NULL */ 347 struct inode *inode; 348 349 /** AIO control block */ 350 struct fuse_io_priv *io; 351 352 /** Link on fi->writepages */ 353 struct list_head writepages_entry; 354 355 /** Request completion callback */ 356 void (*end)(struct fuse_conn *, struct fuse_req *); 357 358 /** Request is stolen from fuse_file->reserved_req */ 359 struct file *stolen_file; 360 }; 361 362 /** 363 * A Fuse connection. 364 * 365 * This structure is created, when the filesystem is mounted, and is 366 * destroyed, when the client device is closed and the filesystem is 367 * unmounted. 368 */ 369 struct fuse_conn { 370 /** Lock protecting accessess to members of this structure */ 371 spinlock_t lock; 372 373 /** Mutex protecting against directory alias creation */ 374 struct mutex inst_mutex; 375 376 /** Refcount */ 377 atomic_t count; 378 379 /** The user id for this mount */ 380 kuid_t user_id; 381 382 /** The group id for this mount */ 383 kgid_t group_id; 384 385 /** The fuse mount flags for this mount */ 386 unsigned flags; 387 388 /** Maximum read size */ 389 unsigned max_read; 390 391 /** Maximum write size */ 392 unsigned max_write; 393 394 /** Readers of the connection are waiting on this */ 395 wait_queue_head_t waitq; 396 397 /** The list of pending requests */ 398 struct list_head pending; 399 400 /** The list of requests being processed */ 401 struct list_head processing; 402 403 /** The list of requests under I/O */ 404 struct list_head io; 405 406 /** The next unique kernel file handle */ 407 u64 khctr; 408 409 /** rbtree of fuse_files waiting for poll events indexed by ph */ 410 struct rb_root polled_files; 411 412 /** Maximum number of outstanding background requests */ 413 unsigned max_background; 414 415 /** Number of background requests at which congestion starts */ 416 unsigned congestion_threshold; 417 418 /** Number of requests currently in the background */ 419 unsigned num_background; 420 421 /** Number of background requests currently queued for userspace */ 422 unsigned active_background; 423 424 /** The list of background requests set aside for later queuing */ 425 struct list_head bg_queue; 426 427 /** Pending interrupts */ 428 struct list_head interrupts; 429 430 /** Queue of pending forgets */ 431 struct fuse_forget_link forget_list_head; 432 struct fuse_forget_link *forget_list_tail; 433 434 /** Batching of FORGET requests (positive indicates FORGET batch) */ 435 int forget_batch; 436 437 /** Flag indicating that INIT reply has been received. Allocating 438 * any fuse request will be suspended until the flag is set */ 439 int initialized; 440 441 /** Flag indicating if connection is blocked. This will be 442 the case before the INIT reply is received, and if there 443 are too many outstading backgrounds requests */ 444 int blocked; 445 446 /** waitq for blocked connection */ 447 wait_queue_head_t blocked_waitq; 448 449 /** waitq for reserved requests */ 450 wait_queue_head_t reserved_req_waitq; 451 452 /** The next unique request id */ 453 u64 reqctr; 454 455 /** Connection established, cleared on umount, connection 456 abort and device release */ 457 unsigned connected; 458 459 /** Connection failed (version mismatch). Cannot race with 460 setting other bitfields since it is only set once in INIT 461 reply, before any other request, and never cleared */ 462 unsigned conn_error:1; 463 464 /** Connection successful. Only set in INIT */ 465 unsigned conn_init:1; 466 467 /** Do readpages asynchronously? Only set in INIT */ 468 unsigned async_read:1; 469 470 /** Do not send separate SETATTR request before open(O_TRUNC) */ 471 unsigned atomic_o_trunc:1; 472 473 /** Filesystem supports NFS exporting. Only set in INIT */ 474 unsigned export_support:1; 475 476 /** Set if bdi is valid */ 477 unsigned bdi_initialized:1; 478 479 /* 480 * The following bitfields are only for optimization purposes 481 * and hence races in setting them will not cause malfunction 482 */ 483 484 /** Is fsync not implemented by fs? */ 485 unsigned no_fsync:1; 486 487 /** Is fsyncdir not implemented by fs? */ 488 unsigned no_fsyncdir:1; 489 490 /** Is flush not implemented by fs? */ 491 unsigned no_flush:1; 492 493 /** Is setxattr not implemented by fs? */ 494 unsigned no_setxattr:1; 495 496 /** Is getxattr not implemented by fs? */ 497 unsigned no_getxattr:1; 498 499 /** Is listxattr not implemented by fs? */ 500 unsigned no_listxattr:1; 501 502 /** Is removexattr not implemented by fs? */ 503 unsigned no_removexattr:1; 504 505 /** Are posix file locking primitives not implemented by fs? */ 506 unsigned no_lock:1; 507 508 /** Is access not implemented by fs? */ 509 unsigned no_access:1; 510 511 /** Is create not implemented by fs? */ 512 unsigned no_create:1; 513 514 /** Is interrupt not implemented by fs? */ 515 unsigned no_interrupt:1; 516 517 /** Is bmap not implemented by fs? */ 518 unsigned no_bmap:1; 519 520 /** Is poll not implemented by fs? */ 521 unsigned no_poll:1; 522 523 /** Do multi-page cached writes */ 524 unsigned big_writes:1; 525 526 /** Don't apply umask to creation modes */ 527 unsigned dont_mask:1; 528 529 /** Are BSD file locking primitives not implemented by fs? */ 530 unsigned no_flock:1; 531 532 /** Is fallocate not implemented by fs? */ 533 unsigned no_fallocate:1; 534 535 /** Use enhanced/automatic page cache invalidation. */ 536 unsigned auto_inval_data:1; 537 538 /** Does the filesystem support readdirplus? */ 539 unsigned do_readdirplus:1; 540 541 /** Does the filesystem want adaptive readdirplus? */ 542 unsigned readdirplus_auto:1; 543 544 /** Does the filesystem support asynchronous direct-IO submission? */ 545 unsigned async_dio:1; 546 547 /** The number of requests waiting for completion */ 548 atomic_t num_waiting; 549 550 /** Negotiated minor version */ 551 unsigned minor; 552 553 /** Backing dev info */ 554 struct backing_dev_info bdi; 555 556 /** Entry on the fuse_conn_list */ 557 struct list_head entry; 558 559 /** Device ID from super block */ 560 dev_t dev; 561 562 /** Dentries in the control filesystem */ 563 struct dentry *ctl_dentry[FUSE_CTL_NUM_DENTRIES]; 564 565 /** number of dentries used in the above array */ 566 int ctl_ndents; 567 568 /** O_ASYNC requests */ 569 struct fasync_struct *fasync; 570 571 /** Key for lock owner ID scrambling */ 572 u32 scramble_key[4]; 573 574 /** Reserved request for the DESTROY message */ 575 struct fuse_req *destroy_req; 576 577 /** Version counter for attribute changes */ 578 u64 attr_version; 579 580 /** Called on final put */ 581 void (*release)(struct fuse_conn *); 582 583 /** Super block for this connection. */ 584 struct super_block *sb; 585 586 /** Read/write semaphore to hold when accessing sb. */ 587 struct rw_semaphore killsb; 588 }; 589 590 static inline struct fuse_conn *get_fuse_conn_super(struct super_block *sb) 591 { 592 return sb->s_fs_info; 593 } 594 595 static inline struct fuse_conn *get_fuse_conn(struct inode *inode) 596 { 597 return get_fuse_conn_super(inode->i_sb); 598 } 599 600 static inline struct fuse_inode *get_fuse_inode(struct inode *inode) 601 { 602 return container_of(inode, struct fuse_inode, inode); 603 } 604 605 static inline u64 get_node_id(struct inode *inode) 606 { 607 return get_fuse_inode(inode)->nodeid; 608 } 609 610 /** Device operations */ 611 extern const struct file_operations fuse_dev_operations; 612 613 extern const struct dentry_operations fuse_dentry_operations; 614 615 /** 616 * Inode to nodeid comparison. 617 */ 618 int fuse_inode_eq(struct inode *inode, void *_nodeidp); 619 620 /** 621 * Get a filled in inode 622 */ 623 struct inode *fuse_iget(struct super_block *sb, u64 nodeid, 624 int generation, struct fuse_attr *attr, 625 u64 attr_valid, u64 attr_version); 626 627 int fuse_lookup_name(struct super_block *sb, u64 nodeid, struct qstr *name, 628 struct fuse_entry_out *outarg, struct inode **inode); 629 630 /** 631 * Send FORGET command 632 */ 633 void fuse_queue_forget(struct fuse_conn *fc, struct fuse_forget_link *forget, 634 u64 nodeid, u64 nlookup); 635 636 struct fuse_forget_link *fuse_alloc_forget(void); 637 638 /* Used by READDIRPLUS */ 639 void fuse_force_forget(struct file *file, u64 nodeid); 640 641 /** 642 * Initialize READ or READDIR request 643 */ 644 void fuse_read_fill(struct fuse_req *req, struct file *file, 645 loff_t pos, size_t count, int opcode); 646 647 /** 648 * Send OPEN or OPENDIR request 649 */ 650 int fuse_open_common(struct inode *inode, struct file *file, bool isdir); 651 652 struct fuse_file *fuse_file_alloc(struct fuse_conn *fc); 653 struct fuse_file *fuse_file_get(struct fuse_file *ff); 654 void fuse_file_free(struct fuse_file *ff); 655 void fuse_finish_open(struct inode *inode, struct file *file); 656 657 void fuse_sync_release(struct fuse_file *ff, int flags); 658 659 /** 660 * Send RELEASE or RELEASEDIR request 661 */ 662 void fuse_release_common(struct file *file, int opcode); 663 664 /** 665 * Send FSYNC or FSYNCDIR request 666 */ 667 int fuse_fsync_common(struct file *file, loff_t start, loff_t end, 668 int datasync, int isdir); 669 670 /** 671 * Notify poll wakeup 672 */ 673 int fuse_notify_poll_wakeup(struct fuse_conn *fc, 674 struct fuse_notify_poll_wakeup_out *outarg); 675 676 /** 677 * Initialize file operations on a regular file 678 */ 679 void fuse_init_file_inode(struct inode *inode); 680 681 /** 682 * Initialize inode operations on regular files and special files 683 */ 684 void fuse_init_common(struct inode *inode); 685 686 /** 687 * Initialize inode and file operations on a directory 688 */ 689 void fuse_init_dir(struct inode *inode); 690 691 /** 692 * Initialize inode operations on a symlink 693 */ 694 void fuse_init_symlink(struct inode *inode); 695 696 /** 697 * Change attributes of an inode 698 */ 699 void fuse_change_attributes(struct inode *inode, struct fuse_attr *attr, 700 u64 attr_valid, u64 attr_version); 701 702 void fuse_change_attributes_common(struct inode *inode, struct fuse_attr *attr, 703 u64 attr_valid); 704 705 /** 706 * Initialize the client device 707 */ 708 int fuse_dev_init(void); 709 710 /** 711 * Cleanup the client device 712 */ 713 void fuse_dev_cleanup(void); 714 715 int fuse_ctl_init(void); 716 void fuse_ctl_cleanup(void); 717 718 /** 719 * Allocate a request 720 */ 721 struct fuse_req *fuse_request_alloc(unsigned npages); 722 723 struct fuse_req *fuse_request_alloc_nofs(unsigned npages); 724 725 /** 726 * Free a request 727 */ 728 void fuse_request_free(struct fuse_req *req); 729 730 /** 731 * Get a request, may fail with -ENOMEM, 732 * caller should specify # elements in req->pages[] explicitly 733 */ 734 struct fuse_req *fuse_get_req(struct fuse_conn *fc, unsigned npages); 735 struct fuse_req *fuse_get_req_for_background(struct fuse_conn *fc, 736 unsigned npages); 737 738 /* 739 * Increment reference count on request 740 */ 741 void __fuse_get_request(struct fuse_req *req); 742 743 /** 744 * Get a request, may fail with -ENOMEM, 745 * useful for callers who doesn't use req->pages[] 746 */ 747 static inline struct fuse_req *fuse_get_req_nopages(struct fuse_conn *fc) 748 { 749 return fuse_get_req(fc, 0); 750 } 751 752 /** 753 * Gets a requests for a file operation, always succeeds 754 */ 755 struct fuse_req *fuse_get_req_nofail_nopages(struct fuse_conn *fc, 756 struct file *file); 757 758 /** 759 * Decrement reference count of a request. If count goes to zero free 760 * the request. 761 */ 762 void fuse_put_request(struct fuse_conn *fc, struct fuse_req *req); 763 764 /** 765 * Send a request (synchronous) 766 */ 767 void fuse_request_send(struct fuse_conn *fc, struct fuse_req *req); 768 769 /** 770 * Send a request in the background 771 */ 772 void fuse_request_send_background(struct fuse_conn *fc, struct fuse_req *req); 773 774 void fuse_request_send_background_locked(struct fuse_conn *fc, 775 struct fuse_req *req); 776 777 /* Abort all requests */ 778 void fuse_abort_conn(struct fuse_conn *fc); 779 780 /** 781 * Invalidate inode attributes 782 */ 783 void fuse_invalidate_attr(struct inode *inode); 784 785 void fuse_invalidate_entry_cache(struct dentry *entry); 786 787 /** 788 * Acquire reference to fuse_conn 789 */ 790 struct fuse_conn *fuse_conn_get(struct fuse_conn *fc); 791 792 void fuse_conn_kill(struct fuse_conn *fc); 793 794 /** 795 * Initialize fuse_conn 796 */ 797 void fuse_conn_init(struct fuse_conn *fc); 798 799 /** 800 * Release reference to fuse_conn 801 */ 802 void fuse_conn_put(struct fuse_conn *fc); 803 804 /** 805 * Add connection to control filesystem 806 */ 807 int fuse_ctl_add_conn(struct fuse_conn *fc); 808 809 /** 810 * Remove connection from control filesystem 811 */ 812 void fuse_ctl_remove_conn(struct fuse_conn *fc); 813 814 /** 815 * Is file type valid? 816 */ 817 int fuse_valid_type(int m); 818 819 /** 820 * Is current process allowed to perform filesystem operation? 821 */ 822 int fuse_allow_current_process(struct fuse_conn *fc); 823 824 u64 fuse_lock_owner_id(struct fuse_conn *fc, fl_owner_t id); 825 826 int fuse_update_attributes(struct inode *inode, struct kstat *stat, 827 struct file *file, bool *refreshed); 828 829 void fuse_flush_writepages(struct inode *inode); 830 831 void fuse_set_nowrite(struct inode *inode); 832 void fuse_release_nowrite(struct inode *inode); 833 834 u64 fuse_get_attr_version(struct fuse_conn *fc); 835 836 /** 837 * File-system tells the kernel to invalidate cache for the given node id. 838 */ 839 int fuse_reverse_inval_inode(struct super_block *sb, u64 nodeid, 840 loff_t offset, loff_t len); 841 842 /** 843 * File-system tells the kernel to invalidate parent attributes and 844 * the dentry matching parent/name. 845 * 846 * If the child_nodeid is non-zero and: 847 * - matches the inode number for the dentry matching parent/name, 848 * - is not a mount point 849 * - is a file or oan empty directory 850 * then the dentry is unhashed (d_delete()). 851 */ 852 int fuse_reverse_inval_entry(struct super_block *sb, u64 parent_nodeid, 853 u64 child_nodeid, struct qstr *name); 854 855 int fuse_do_open(struct fuse_conn *fc, u64 nodeid, struct file *file, 856 bool isdir); 857 ssize_t fuse_direct_io(struct fuse_io_priv *io, const struct iovec *iov, 858 unsigned long nr_segs, size_t count, loff_t *ppos, 859 int write); 860 long fuse_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg, 861 unsigned int flags); 862 long fuse_ioctl_common(struct file *file, unsigned int cmd, 863 unsigned long arg, unsigned int flags); 864 unsigned fuse_file_poll(struct file *file, poll_table *wait); 865 int fuse_dev_release(struct inode *inode, struct file *file); 866 867 void fuse_write_update_size(struct inode *inode, loff_t pos); 868 869 int fuse_do_setattr(struct inode *inode, struct iattr *attr, 870 struct file *file); 871 872 #endif /* _FS_FUSE_I_H */ 873