4 * Copyright (C) 1992 Rick Sladkey
6 * Changes Copyright (C) 1994 by Florian La Roche
7 * - Do not copy data too often around in the kernel.
8 * - In nfs_file_read the return value of kmalloc wasn't checked.
9 * - Put in a better version of read look-ahead buffering. Original idea
10 * and implementation by Wai S Kok elekokws@ee.nus.sg.
12 * Expire cache on write to a file by Wai S Kok (Oct 1994).
14 * Total rewrite of read side for new NFS buffer cache.. Linus.
16 * nfs regular file handling functions
19 #include <linux/time.h>
20 #include <linux/kernel.h>
21 #include <linux/errno.h>
22 #include <linux/fcntl.h>
23 #include <linux/stat.h>
24 #include <linux/nfs_fs.h>
25 #include <linux/nfs_mount.h>
27 #include <linux/pagemap.h>
28 #include <linux/aio.h>
29 #include <linux/gfp.h>
30 #include <linux/swap.h>
32 #include <asm/uaccess.h>
34 #include "delegation.h"
40 #define NFSDBG_FACILITY NFSDBG_FILE
42 static const struct vm_operations_struct nfs_file_vm_ops;
44 const struct inode_operations nfs_file_inode_operations = {
45 .permission = nfs_permission,
46 .getattr = nfs_getattr,
47 .setattr = nfs_setattr,
51 const struct inode_operations nfs3_file_inode_operations = {
52 .permission = nfs_permission,
53 .getattr = nfs_getattr,
54 .setattr = nfs_setattr,
55 .listxattr = nfs3_listxattr,
56 .getxattr = nfs3_getxattr,
57 .setxattr = nfs3_setxattr,
58 .removexattr = nfs3_removexattr,
60 #endif /* CONFIG_NFS_v3 */
62 /* Hack for future NFS swap support */
64 # define IS_SWAPFILE(inode) (0)
67 static int nfs_check_flags(int flags)
69 if ((flags & (O_APPEND | O_DIRECT)) == (O_APPEND | O_DIRECT))
79 nfs_file_open(struct inode *inode, struct file *filp)
83 dprintk("NFS: open file(%s/%s)\n",
84 filp->f_path.dentry->d_parent->d_name.name,
85 filp->f_path.dentry->d_name.name);
87 nfs_inc_stats(inode, NFSIOS_VFSOPEN);
88 res = nfs_check_flags(filp->f_flags);
92 res = nfs_open(inode, filp);
97 nfs_file_release(struct inode *inode, struct file *filp)
99 dprintk("NFS: release(%s/%s)\n",
100 filp->f_path.dentry->d_parent->d_name.name,
101 filp->f_path.dentry->d_name.name);
103 nfs_inc_stats(inode, NFSIOS_VFSRELEASE);
104 return nfs_release(inode, filp);
108 * nfs_revalidate_size - Revalidate the file size
109 * @inode - pointer to inode struct
110 * @file - pointer to struct file
112 * Revalidates the file length. This is basically a wrapper around
113 * nfs_revalidate_inode() that takes into account the fact that we may
114 * have cached writes (in which case we don't care about the server's
115 * idea of what the file length is), or O_DIRECT (in which case we
116 * shouldn't trust the cache).
118 static int nfs_revalidate_file_size(struct inode *inode, struct file *filp)
120 struct nfs_server *server = NFS_SERVER(inode);
121 struct nfs_inode *nfsi = NFS_I(inode);
123 if (nfs_have_delegated_attributes(inode))
126 if (filp->f_flags & O_DIRECT)
128 if (nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE)
130 if (nfs_attribute_timeout(inode))
135 return __nfs_revalidate_inode(server, inode);
138 static loff_t nfs_file_llseek(struct file *filp, loff_t offset, int origin)
140 dprintk("NFS: llseek file(%s/%s, %lld, %d)\n",
141 filp->f_path.dentry->d_parent->d_name.name,
142 filp->f_path.dentry->d_name.name,
146 * origin == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate
147 * the cached file length
149 if (origin != SEEK_SET && origin != SEEK_CUR) {
150 struct inode *inode = filp->f_mapping->host;
152 int retval = nfs_revalidate_file_size(inode, filp);
154 return (loff_t)retval;
157 return generic_file_llseek(filp, offset, origin);
161 * Flush all dirty pages, and check for write errors.
164 nfs_file_flush(struct file *file, fl_owner_t id)
166 struct dentry *dentry = file->f_path.dentry;
167 struct inode *inode = dentry->d_inode;
169 dprintk("NFS: flush(%s/%s)\n",
170 dentry->d_parent->d_name.name,
171 dentry->d_name.name);
173 nfs_inc_stats(inode, NFSIOS_VFSFLUSH);
174 if ((file->f_mode & FMODE_WRITE) == 0)
178 * If we're holding a write delegation, then just start the i/o
179 * but don't wait for completion (or send a commit).
181 if (nfs_have_delegation(inode, FMODE_WRITE))
182 return filemap_fdatawrite(file->f_mapping);
184 /* Flush writes to the server and return any errors */
185 return vfs_fsync(file, 0);
189 nfs_file_read(struct kiocb *iocb, const struct iovec *iov,
190 unsigned long nr_segs, loff_t pos)
192 struct dentry * dentry = iocb->ki_filp->f_path.dentry;
193 struct inode * inode = dentry->d_inode;
196 if (iocb->ki_filp->f_flags & O_DIRECT)
197 return nfs_file_direct_read(iocb, iov, nr_segs, pos);
199 dprintk("NFS: read(%s/%s, %lu@%lu)\n",
200 dentry->d_parent->d_name.name, dentry->d_name.name,
201 (unsigned long) iov_length(iov, nr_segs), (unsigned long) pos);
203 result = nfs_revalidate_mapping(inode, iocb->ki_filp->f_mapping);
205 result = generic_file_aio_read(iocb, iov, nr_segs, pos);
207 nfs_add_stats(inode, NFSIOS_NORMALREADBYTES, result);
213 nfs_file_splice_read(struct file *filp, loff_t *ppos,
214 struct pipe_inode_info *pipe, size_t count,
217 struct dentry *dentry = filp->f_path.dentry;
218 struct inode *inode = dentry->d_inode;
221 dprintk("NFS: splice_read(%s/%s, %lu@%Lu)\n",
222 dentry->d_parent->d_name.name, dentry->d_name.name,
223 (unsigned long) count, (unsigned long long) *ppos);
225 res = nfs_revalidate_mapping(inode, filp->f_mapping);
227 res = generic_file_splice_read(filp, ppos, pipe, count, flags);
229 nfs_add_stats(inode, NFSIOS_NORMALREADBYTES, res);
235 nfs_file_mmap(struct file * file, struct vm_area_struct * vma)
237 struct dentry *dentry = file->f_path.dentry;
238 struct inode *inode = dentry->d_inode;
241 dprintk("NFS: mmap(%s/%s)\n",
242 dentry->d_parent->d_name.name, dentry->d_name.name);
244 /* Note: generic_file_mmap() returns ENOSYS on nommu systems
245 * so we call that before revalidating the mapping
247 status = generic_file_mmap(file, vma);
249 vma->vm_ops = &nfs_file_vm_ops;
250 status = nfs_revalidate_mapping(inode, file->f_mapping);
256 * Flush any dirty pages for this process, and check for write errors.
257 * The return status from this call provides a reliable indication of
258 * whether any write errors occurred for this process.
260 * Notice that it clears the NFS_CONTEXT_ERROR_WRITE before synching to
261 * disk, but it retrieves and clears ctx->error after synching, despite
262 * the two being set at the same time in nfs_context_set_write_error().
263 * This is because the former is used to notify the _next_ call to
264 * nfs_file_write() that a write error occurred, and hence cause it to
265 * fall back to doing a synchronous write.
268 nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync)
270 struct dentry *dentry = file->f_path.dentry;
271 struct nfs_open_context *ctx = nfs_file_open_context(file);
272 struct inode *inode = dentry->d_inode;
273 int have_error, status;
276 dprintk("NFS: fsync file(%s/%s) datasync %d\n",
277 dentry->d_parent->d_name.name, dentry->d_name.name,
280 ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
281 mutex_lock(&inode->i_mutex);
283 nfs_inc_stats(inode, NFSIOS_VFSFSYNC);
284 have_error = test_and_clear_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags);
285 status = nfs_commit_inode(inode, FLUSH_SYNC);
286 if (status >= 0 && ret < 0)
288 have_error |= test_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags);
290 ret = xchg(&ctx->error, 0);
291 if (!ret && status < 0)
293 if (!ret && !datasync)
294 /* application has asked for meta-data sync */
295 ret = pnfs_layoutcommit_inode(inode, true);
296 mutex_unlock(&inode->i_mutex);
301 * Decide whether a read/modify/write cycle may be more efficient
302 * then a modify/write/read cycle when writing to a page in the
305 * The modify/write/read cycle may occur if a page is read before
306 * being completely filled by the writer. In this situation, the
307 * page must be completely written to stable storage on the server
308 * before it can be refilled by reading in the page from the server.
309 * This can lead to expensive, small, FILE_SYNC mode writes being
312 * It may be more efficient to read the page first if the file is
313 * open for reading in addition to writing, the page is not marked
314 * as Uptodate, it is not dirty or waiting to be committed,
315 * indicating that it was previously allocated and then modified,
316 * that there were valid bytes of data in that range of the file,
317 * and that the new data won't completely replace the old data in
318 * that range of the file.
320 static int nfs_want_read_modify_write(struct file *file, struct page *page,
321 loff_t pos, unsigned len)
323 unsigned int pglen = nfs_page_length(page);
324 unsigned int offset = pos & (PAGE_CACHE_SIZE - 1);
325 unsigned int end = offset + len;
327 if ((file->f_mode & FMODE_READ) && /* open for read? */
328 !PageUptodate(page) && /* Uptodate? */
329 !PagePrivate(page) && /* i/o request already? */
330 pglen && /* valid bytes of file? */
331 (end < pglen || offset)) /* replace all valid bytes? */
337 * This does the "real" work of the write. We must allocate and lock the
338 * page to be sent back to the generic routine, which then copies the
339 * data from user space.
341 * If the writer ends up delaying the write, the writer needs to
342 * increment the page use counts until he is done with the page.
344 static int nfs_write_begin(struct file *file, struct address_space *mapping,
345 loff_t pos, unsigned len, unsigned flags,
346 struct page **pagep, void **fsdata)
349 pgoff_t index = pos >> PAGE_CACHE_SHIFT;
353 dfprintk(PAGECACHE, "NFS: write_begin(%s/%s(%ld), %u@%lld)\n",
354 file->f_path.dentry->d_parent->d_name.name,
355 file->f_path.dentry->d_name.name,
356 mapping->host->i_ino, len, (long long) pos);
360 * Prevent starvation issues if someone is doing a consistency
363 ret = wait_on_bit(&NFS_I(mapping->host)->flags, NFS_INO_FLUSHING,
364 nfs_wait_bit_killable, TASK_KILLABLE);
368 page = grab_cache_page_write_begin(mapping, index, flags);
373 ret = nfs_flush_incompatible(file, page);
376 page_cache_release(page);
377 } else if (!once_thru &&
378 nfs_want_read_modify_write(file, page, pos, len)) {
380 ret = nfs_readpage(file, page);
381 page_cache_release(page);
388 static int nfs_write_end(struct file *file, struct address_space *mapping,
389 loff_t pos, unsigned len, unsigned copied,
390 struct page *page, void *fsdata)
392 unsigned offset = pos & (PAGE_CACHE_SIZE - 1);
395 dfprintk(PAGECACHE, "NFS: write_end(%s/%s(%ld), %u@%lld)\n",
396 file->f_path.dentry->d_parent->d_name.name,
397 file->f_path.dentry->d_name.name,
398 mapping->host->i_ino, len, (long long) pos);
401 * Zero any uninitialised parts of the page, and then mark the page
402 * as up to date if it turns out that we're extending the file.
404 if (!PageUptodate(page)) {
405 unsigned pglen = nfs_page_length(page);
406 unsigned end = offset + len;
409 zero_user_segments(page, 0, offset,
410 end, PAGE_CACHE_SIZE);
411 SetPageUptodate(page);
412 } else if (end >= pglen) {
413 zero_user_segment(page, end, PAGE_CACHE_SIZE);
415 SetPageUptodate(page);
417 zero_user_segment(page, pglen, PAGE_CACHE_SIZE);
420 status = nfs_updatepage(file, page, offset, copied);
423 page_cache_release(page);
431 * Partially or wholly invalidate a page
432 * - Release the private state associated with a page if undergoing complete
434 * - Called if either PG_private or PG_fscache is set on the page
435 * - Caller holds page lock
437 static void nfs_invalidate_page(struct page *page, unsigned long offset)
439 dfprintk(PAGECACHE, "NFS: invalidate_page(%p, %lu)\n", page, offset);
443 /* Cancel any unstarted writes on this page */
444 nfs_wb_page_cancel(page->mapping->host, page);
446 nfs_fscache_invalidate_page(page, page->mapping->host);
450 * Attempt to release the private state associated with a page
451 * - Called if either PG_private or PG_fscache is set on the page
452 * - Caller holds page lock
453 * - Return true (may release page) or false (may not)
455 static int nfs_release_page(struct page *page, gfp_t gfp)
457 struct address_space *mapping = page->mapping;
459 dfprintk(PAGECACHE, "NFS: release_page(%p)\n", page);
461 /* Only do I/O if gfp is a superset of GFP_KERNEL */
462 if (mapping && (gfp & GFP_KERNEL) == GFP_KERNEL) {
463 int how = FLUSH_SYNC;
465 /* Don't let kswapd deadlock waiting for OOM RPC calls */
466 if (current_is_kswapd())
468 nfs_commit_inode(mapping->host, how);
470 /* If PagePrivate() is set, then the page is not freeable */
471 if (PagePrivate(page))
473 return nfs_fscache_release_page(page, gfp);
477 * Attempt to clear the private state associated with a page when an error
478 * occurs that requires the cached contents of an inode to be written back or
480 * - Called if either PG_private or fscache is set on the page
481 * - Caller holds page lock
482 * - Return 0 if successful, -error otherwise
484 static int nfs_launder_page(struct page *page)
486 struct inode *inode = page->mapping->host;
487 struct nfs_inode *nfsi = NFS_I(inode);
489 dfprintk(PAGECACHE, "NFS: launder_page(%ld, %llu)\n",
490 inode->i_ino, (long long)page_offset(page));
492 nfs_fscache_wait_on_page_write(nfsi, page);
493 return nfs_wb_page(inode, page);
496 const struct address_space_operations nfs_file_aops = {
497 .readpage = nfs_readpage,
498 .readpages = nfs_readpages,
499 .set_page_dirty = __set_page_dirty_nobuffers,
500 .writepage = nfs_writepage,
501 .writepages = nfs_writepages,
502 .write_begin = nfs_write_begin,
503 .write_end = nfs_write_end,
504 .invalidatepage = nfs_invalidate_page,
505 .releasepage = nfs_release_page,
506 .direct_IO = nfs_direct_IO,
507 .migratepage = nfs_migrate_page,
508 .launder_page = nfs_launder_page,
509 .error_remove_page = generic_error_remove_page,
513 * Notification that a PTE pointing to an NFS page is about to be made
514 * writable, implying that someone is about to modify the page through a
515 * shared-writable mapping
517 static int nfs_vm_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
519 struct page *page = vmf->page;
520 struct file *filp = vma->vm_file;
521 struct dentry *dentry = filp->f_path.dentry;
523 int ret = VM_FAULT_NOPAGE;
524 struct address_space *mapping;
526 dfprintk(PAGECACHE, "NFS: vm_page_mkwrite(%s/%s(%ld), offset %lld)\n",
527 dentry->d_parent->d_name.name, dentry->d_name.name,
528 filp->f_mapping->host->i_ino,
529 (long long)page_offset(page));
531 /* make sure the cache has finished storing the page */
532 nfs_fscache_wait_on_page_write(NFS_I(dentry->d_inode), page);
535 mapping = page->mapping;
536 if (mapping != dentry->d_inode->i_mapping)
539 wait_on_page_writeback(page);
541 pagelen = nfs_page_length(page);
545 ret = VM_FAULT_LOCKED;
546 if (nfs_flush_incompatible(filp, page) == 0 &&
547 nfs_updatepage(filp, page, 0, pagelen) == 0)
550 ret = VM_FAULT_SIGBUS;
557 static const struct vm_operations_struct nfs_file_vm_ops = {
558 .fault = filemap_fault,
559 .page_mkwrite = nfs_vm_page_mkwrite,
562 static int nfs_need_sync_write(struct file *filp, struct inode *inode)
564 struct nfs_open_context *ctx;
566 if (IS_SYNC(inode) || (filp->f_flags & O_DSYNC))
568 ctx = nfs_file_open_context(filp);
569 if (test_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags))
574 static ssize_t nfs_file_write(struct kiocb *iocb, const struct iovec *iov,
575 unsigned long nr_segs, loff_t pos)
577 struct dentry * dentry = iocb->ki_filp->f_path.dentry;
578 struct inode * inode = dentry->d_inode;
579 unsigned long written = 0;
581 size_t count = iov_length(iov, nr_segs);
583 if (iocb->ki_filp->f_flags & O_DIRECT)
584 return nfs_file_direct_write(iocb, iov, nr_segs, pos);
586 dprintk("NFS: write(%s/%s, %lu@%Ld)\n",
587 dentry->d_parent->d_name.name, dentry->d_name.name,
588 (unsigned long) count, (long long) pos);
591 if (IS_SWAPFILE(inode))
594 * O_APPEND implies that we must revalidate the file length.
596 if (iocb->ki_filp->f_flags & O_APPEND) {
597 result = nfs_revalidate_file_size(inode, iocb->ki_filp);
606 result = generic_file_aio_write(iocb, iov, nr_segs, pos);
610 /* Return error values for O_DSYNC and IS_SYNC() */
611 if (result >= 0 && nfs_need_sync_write(iocb->ki_filp, inode)) {
612 int err = vfs_fsync(iocb->ki_filp, 0);
617 nfs_add_stats(inode, NFSIOS_NORMALWRITTENBYTES, written);
622 printk(KERN_INFO "NFS: attempt to write to active swap file!\n");
626 static ssize_t nfs_file_splice_write(struct pipe_inode_info *pipe,
627 struct file *filp, loff_t *ppos,
628 size_t count, unsigned int flags)
630 struct dentry *dentry = filp->f_path.dentry;
631 struct inode *inode = dentry->d_inode;
632 unsigned long written = 0;
635 dprintk("NFS splice_write(%s/%s, %lu@%llu)\n",
636 dentry->d_parent->d_name.name, dentry->d_name.name,
637 (unsigned long) count, (unsigned long long) *ppos);
640 * The combination of splice and an O_APPEND destination is disallowed.
643 ret = generic_file_splice_write(pipe, filp, ppos, count, flags);
647 if (ret >= 0 && nfs_need_sync_write(filp, inode)) {
648 int err = vfs_fsync(filp, 0);
653 nfs_add_stats(inode, NFSIOS_NORMALWRITTENBYTES, written);
658 do_getlk(struct file *filp, int cmd, struct file_lock *fl, int is_local)
660 struct inode *inode = filp->f_mapping->host;
662 unsigned int saved_type = fl->fl_type;
664 /* Try local locking first */
665 posix_test_lock(filp, fl);
666 if (fl->fl_type != F_UNLCK) {
667 /* found a conflict */
670 fl->fl_type = saved_type;
672 if (nfs_have_delegation(inode, FMODE_READ))
678 status = NFS_PROTO(inode)->lock(filp, cmd, fl);
682 fl->fl_type = F_UNLCK;
686 static int do_vfs_lock(struct file *file, struct file_lock *fl)
689 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
691 res = posix_lock_file_wait(file, fl);
694 res = flock_lock_file_wait(file, fl);
703 do_unlk(struct file *filp, int cmd, struct file_lock *fl, int is_local)
705 struct inode *inode = filp->f_mapping->host;
709 * Flush all pending writes before doing anything
712 nfs_sync_mapping(filp->f_mapping);
714 /* NOTE: special case
715 * If we're signalled while cleaning up locks on process exit, we
716 * still need to complete the unlock.
719 * Use local locking if mounted with "-onolock" or with appropriate
723 status = NFS_PROTO(inode)->lock(filp, cmd, fl);
725 status = do_vfs_lock(filp, fl);
730 is_time_granular(struct timespec *ts) {
731 return ((ts->tv_sec == 0) && (ts->tv_nsec <= 1000));
735 do_setlk(struct file *filp, int cmd, struct file_lock *fl, int is_local)
737 struct inode *inode = filp->f_mapping->host;
741 * Flush all pending writes before doing anything
744 status = nfs_sync_mapping(filp->f_mapping);
749 * Use local locking if mounted with "-onolock" or with appropriate
753 status = NFS_PROTO(inode)->lock(filp, cmd, fl);
755 status = do_vfs_lock(filp, fl);
760 * Revalidate the cache if the server has time stamps granular
761 * enough to detect subsecond changes. Otherwise, clear the
762 * cache to prevent missing any changes.
764 * This makes locking act as a cache coherency point.
766 nfs_sync_mapping(filp->f_mapping);
767 if (!nfs_have_delegation(inode, FMODE_READ)) {
768 if (is_time_granular(&NFS_SERVER(inode)->time_delta))
769 __nfs_revalidate_inode(NFS_SERVER(inode), inode);
771 nfs_zap_caches(inode);
778 * Lock a (portion of) a file
780 static int nfs_lock(struct file *filp, int cmd, struct file_lock *fl)
782 struct inode *inode = filp->f_mapping->host;
786 dprintk("NFS: lock(%s/%s, t=%x, fl=%x, r=%lld:%lld)\n",
787 filp->f_path.dentry->d_parent->d_name.name,
788 filp->f_path.dentry->d_name.name,
789 fl->fl_type, fl->fl_flags,
790 (long long)fl->fl_start, (long long)fl->fl_end);
792 nfs_inc_stats(inode, NFSIOS_VFSLOCK);
794 /* No mandatory locks over NFS */
795 if (__mandatory_lock(inode) && fl->fl_type != F_UNLCK)
798 if (NFS_SERVER(inode)->flags & NFS_MOUNT_LOCAL_FCNTL)
801 if (NFS_PROTO(inode)->lock_check_bounds != NULL) {
802 ret = NFS_PROTO(inode)->lock_check_bounds(fl);
808 ret = do_getlk(filp, cmd, fl, is_local);
809 else if (fl->fl_type == F_UNLCK)
810 ret = do_unlk(filp, cmd, fl, is_local);
812 ret = do_setlk(filp, cmd, fl, is_local);
818 * Lock a (portion of) a file
820 static int nfs_flock(struct file *filp, int cmd, struct file_lock *fl)
822 struct inode *inode = filp->f_mapping->host;
825 dprintk("NFS: flock(%s/%s, t=%x, fl=%x)\n",
826 filp->f_path.dentry->d_parent->d_name.name,
827 filp->f_path.dentry->d_name.name,
828 fl->fl_type, fl->fl_flags);
830 if (!(fl->fl_flags & FL_FLOCK))
833 if (NFS_SERVER(inode)->flags & NFS_MOUNT_LOCAL_FLOCK)
836 /* We're simulating flock() locks using posix locks on the server */
837 fl->fl_owner = (fl_owner_t)filp;
839 fl->fl_end = OFFSET_MAX;
841 if (fl->fl_type == F_UNLCK)
842 return do_unlk(filp, cmd, fl, is_local);
843 return do_setlk(filp, cmd, fl, is_local);
847 * There is no protocol support for leases, so we have no way to implement
848 * them correctly in the face of opens by other clients.
850 static int nfs_setlease(struct file *file, long arg, struct file_lock **fl)
852 dprintk("NFS: setlease(%s/%s, arg=%ld)\n",
853 file->f_path.dentry->d_parent->d_name.name,
854 file->f_path.dentry->d_name.name, arg);
858 const struct file_operations nfs_file_operations = {
859 .llseek = nfs_file_llseek,
860 .read = do_sync_read,
861 .write = do_sync_write,
862 .aio_read = nfs_file_read,
863 .aio_write = nfs_file_write,
864 .mmap = nfs_file_mmap,
865 .open = nfs_file_open,
866 .flush = nfs_file_flush,
867 .release = nfs_file_release,
868 .fsync = nfs_file_fsync,
871 .splice_read = nfs_file_splice_read,
872 .splice_write = nfs_file_splice_write,
873 .check_flags = nfs_check_flags,
874 .setlease = nfs_setlease,
879 nfs4_file_open(struct inode *inode, struct file *filp)
882 * NFSv4 opens are handled in d_lookup and d_revalidate. If we get to
883 * this point, then something is very wrong
885 dprintk("NFS: %s called! inode=%p filp=%p\n", __func__, inode, filp);
889 const struct file_operations nfs4_file_operations = {
890 .llseek = nfs_file_llseek,
891 .read = do_sync_read,
892 .write = do_sync_write,
893 .aio_read = nfs_file_read,
894 .aio_write = nfs_file_write,
895 .mmap = nfs_file_mmap,
896 .open = nfs4_file_open,
897 .flush = nfs_file_flush,
898 .release = nfs_file_release,
899 .fsync = nfs_file_fsync,
902 .splice_read = nfs_file_splice_read,
903 .splice_write = nfs_file_splice_write,
904 .check_flags = nfs_check_flags,
905 .setlease = nfs_setlease,
907 #endif /* CONFIG_NFS_V4 */