Moved, renamed, and deleted files

The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.

1 files changed, 0 insertions, 900 deletions

diff --git a/ANDROID_3.4.5/fs/nfs/file.c b/ANDROID_3.4.5/fs/nfs/file.c
deleted file mode 100644
index aa9b709f..00000000
--- a/ANDROID_3.4.5/fs/nfs/file.c
+++ /dev/null
@@ -1,900 +0,0 @@
-/*
- *  linux/fs/nfs/file.c
- *
- *  Copyright (C) 1992  Rick Sladkey
- *
- *  Changes Copyright (C) 1994 by Florian La Roche
- *   - Do not copy data too often around in the kernel.
- *   - In nfs_file_read the return value of kmalloc wasn't checked.
- *   - Put in a better version of read look-ahead buffering. Original idea
- *     and implementation by Wai S Kok elekokws@ee.nus.sg.
- *
- *  Expire cache on write to a file by Wai S Kok (Oct 1994).
- *
- *  Total rewrite of read side for new NFS buffer cache.. Linus.
- *
- *  nfs regular file handling functions
- */
-
-#include <linux/time.h>
-#include <linux/kernel.h>
-#include <linux/errno.h>
-#include <linux/fcntl.h>
-#include <linux/stat.h>
-#include <linux/nfs_fs.h>
-#include <linux/nfs_mount.h>
-#include <linux/mm.h>
-#include <linux/pagemap.h>
-#include <linux/aio.h>
-#include <linux/gfp.h>
-#include <linux/swap.h>
-
-#include <asm/uaccess.h>
-
-#include "delegation.h"
-#include "internal.h"
-#include "iostat.h"
-#include "fscache.h"
-#include "pnfs.h"
-
-#define NFSDBG_FACILITY		NFSDBG_FILE
-
-static const struct vm_operations_struct nfs_file_vm_ops;
-
-const struct inode_operations nfs_file_inode_operations = {
-	.permission	= nfs_permission,
-	.getattr	= nfs_getattr,
-	.setattr	= nfs_setattr,
-};
-
-#ifdef CONFIG_NFS_V3
-const struct inode_operations nfs3_file_inode_operations = {
-	.permission	= nfs_permission,
-	.getattr	= nfs_getattr,
-	.setattr	= nfs_setattr,
-	.listxattr	= nfs3_listxattr,
-	.getxattr	= nfs3_getxattr,
-	.setxattr	= nfs3_setxattr,
-	.removexattr	= nfs3_removexattr,
-};
-#endif  /* CONFIG_NFS_v3 */
-
-/* Hack for future NFS swap support */
-#ifndef IS_SWAPFILE
-# define IS_SWAPFILE(inode)	(0)
-#endif
-
-static int nfs_check_flags(int flags)
-{
-	if ((flags & (O_APPEND | O_DIRECT)) == (O_APPEND | O_DIRECT))
-		return -EINVAL;
-
-	return 0;
-}
-
-/*
- * Open file
- */
-static int
-nfs_file_open(struct inode *inode, struct file *filp)
-{
-	int res;
-
-	dprintk("NFS: open file(%s/%s)\n",
-			filp->f_path.dentry->d_parent->d_name.name,
-			filp->f_path.dentry->d_name.name);
-
-	nfs_inc_stats(inode, NFSIOS_VFSOPEN);
-	res = nfs_check_flags(filp->f_flags);
-	if (res)
-		return res;
-
-	res = nfs_open(inode, filp);
-	return res;
-}
-
-static int
-nfs_file_release(struct inode *inode, struct file *filp)
-{
-	dprintk("NFS: release(%s/%s)\n",
-			filp->f_path.dentry->d_parent->d_name.name,
-			filp->f_path.dentry->d_name.name);
-
-	nfs_inc_stats(inode, NFSIOS_VFSRELEASE);
-	return nfs_release(inode, filp);
-}
-
-/**
- * nfs_revalidate_size - Revalidate the file size
- * @inode - pointer to inode struct
- * @file - pointer to struct file
- *
- * Revalidates the file length. This is basically a wrapper around
- * nfs_revalidate_inode() that takes into account the fact that we may
- * have cached writes (in which case we don't care about the server's
- * idea of what the file length is), or O_DIRECT (in which case we
- * shouldn't trust the cache).
- */
-static int nfs_revalidate_file_size(struct inode *inode, struct file *filp)
-{
-	struct nfs_server *server = NFS_SERVER(inode);
-	struct nfs_inode *nfsi = NFS_I(inode);
-
-	if (nfs_have_delegated_attributes(inode))
-		goto out_noreval;
-
-	if (filp->f_flags & O_DIRECT)
-		goto force_reval;
-	if (nfsi->cache_validity & NFS_INO_REVAL_PAGECACHE)
-		goto force_reval;
-	if (nfs_attribute_timeout(inode))
-		goto force_reval;
-out_noreval:
-	return 0;
-force_reval:
-	return __nfs_revalidate_inode(server, inode);
-}
-
-static loff_t nfs_file_llseek(struct file *filp, loff_t offset, int origin)
-{
-	dprintk("NFS: llseek file(%s/%s, %lld, %d)\n",
-			filp->f_path.dentry->d_parent->d_name.name,
-			filp->f_path.dentry->d_name.name,
-			offset, origin);
-
-	/*
-	 * origin == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate
-	 * the cached file length
-	 */
-	if (origin != SEEK_SET && origin != SEEK_CUR) {
-		struct inode *inode = filp->f_mapping->host;
-
-		int retval = nfs_revalidate_file_size(inode, filp);
-		if (retval < 0)
-			return (loff_t)retval;
-	}
-
-	return generic_file_llseek(filp, offset, origin);
-}
-
-/*
- * Flush all dirty pages, and check for write errors.
- */
-static int
-nfs_file_flush(struct file *file, fl_owner_t id)
-{
-	struct dentry	*dentry = file->f_path.dentry;
-	struct inode	*inode = dentry->d_inode;
-
-	dprintk("NFS: flush(%s/%s)\n",
-			dentry->d_parent->d_name.name,
-			dentry->d_name.name);
-
-	nfs_inc_stats(inode, NFSIOS_VFSFLUSH);
-	if ((file->f_mode & FMODE_WRITE) == 0)
-		return 0;
-
-	/* Flush writes to the server and return any errors */
-	return vfs_fsync(file, 0);
-}
-
-static ssize_t
-nfs_file_read(struct kiocb *iocb, const struct iovec *iov,
-		unsigned long nr_segs, loff_t pos)
-{
-	struct dentry * dentry = iocb->ki_filp->f_path.dentry;
-	struct inode * inode = dentry->d_inode;
-	ssize_t result;
-
-	if (iocb->ki_filp->f_flags & O_DIRECT)
-		return nfs_file_direct_read(iocb, iov, nr_segs, pos);
-
-	dprintk("NFS: read(%s/%s, %lu@%lu)\n",
-		dentry->d_parent->d_name.name, dentry->d_name.name,
-		(unsigned long) iov_length(iov, nr_segs), (unsigned long) pos);
-
-	result = nfs_revalidate_mapping(inode, iocb->ki_filp->f_mapping);
-	if (!result) {
-		result = generic_file_aio_read(iocb, iov, nr_segs, pos);
-		if (result > 0)
-			nfs_add_stats(inode, NFSIOS_NORMALREADBYTES, result);
-	}
-	return result;
-}
-
-static ssize_t
-nfs_file_splice_read(struct file *filp, loff_t *ppos,
-		     struct pipe_inode_info *pipe, size_t count,
-		     unsigned int flags)
-{
-	struct dentry *dentry = filp->f_path.dentry;
-	struct inode *inode = dentry->d_inode;
-	ssize_t res;
-
-	dprintk("NFS: splice_read(%s/%s, %lu@%Lu)\n",
-		dentry->d_parent->d_name.name, dentry->d_name.name,
-		(unsigned long) count, (unsigned long long) *ppos);
-
-	res = nfs_revalidate_mapping(inode, filp->f_mapping);
-	if (!res) {
-		res = generic_file_splice_read(filp, ppos, pipe, count, flags);
-		if (res > 0)
-			nfs_add_stats(inode, NFSIOS_NORMALREADBYTES, res);
-	}
-	return res;
-}
-
-static int
-nfs_file_mmap(struct file * file, struct vm_area_struct * vma)
-{
-	struct dentry *dentry = file->f_path.dentry;
-	struct inode *inode = dentry->d_inode;
-	int	status;
-
-	dprintk("NFS: mmap(%s/%s)\n",
-		dentry->d_parent->d_name.name, dentry->d_name.name);
-
-	/* Note: generic_file_mmap() returns ENOSYS on nommu systems
-	 *       so we call that before revalidating the mapping
-	 */
-	status = generic_file_mmap(file, vma);
-	if (!status) {
-		vma->vm_ops = &nfs_file_vm_ops;
-		status = nfs_revalidate_mapping(inode, file->f_mapping);
-	}
-	return status;
-}
-
-/*
- * Flush any dirty pages for this process, and check for write errors.
- * The return status from this call provides a reliable indication of
- * whether any write errors occurred for this process.
- *
- * Notice that it clears the NFS_CONTEXT_ERROR_WRITE before synching to
- * disk, but it retrieves and clears ctx->error after synching, despite
- * the two being set at the same time in nfs_context_set_write_error().
- * This is because the former is used to notify the _next_ call to
- * nfs_file_write() that a write error occurred, and hence cause it to
- * fall back to doing a synchronous write.
- */
-static int
-nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync)
-{
-	struct dentry *dentry = file->f_path.dentry;
-	struct nfs_open_context *ctx = nfs_file_open_context(file);
-	struct inode *inode = dentry->d_inode;
-	int have_error, status;
-	int ret = 0;
-
-	dprintk("NFS: fsync file(%s/%s) datasync %d\n",
-			dentry->d_parent->d_name.name, dentry->d_name.name,
-			datasync);
-
-	ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
-	mutex_lock(&inode->i_mutex);
-
-	nfs_inc_stats(inode, NFSIOS_VFSFSYNC);
-	have_error = test_and_clear_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags);
-	status = nfs_commit_inode(inode, FLUSH_SYNC);
-	if (status >= 0 && ret < 0)
-		status = ret;
-	have_error |= test_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags);
-	if (have_error)
-		ret = xchg(&ctx->error, 0);
-	if (!ret && status < 0)
-		ret = status;
-	if (!ret && !datasync)
-		/* application has asked for meta-data sync */
-		ret = pnfs_layoutcommit_inode(inode, true);
-	mutex_unlock(&inode->i_mutex);
-	return ret;
-}
-
-/*
- * Decide whether a read/modify/write cycle may be more efficient
- * then a modify/write/read cycle when writing to a page in the
- * page cache.
- *
- * The modify/write/read cycle may occur if a page is read before
- * being completely filled by the writer.  In this situation, the
- * page must be completely written to stable storage on the server
- * before it can be refilled by reading in the page from the server.
- * This can lead to expensive, small, FILE_SYNC mode writes being
- * done.
- *
- * It may be more efficient to read the page first if the file is
- * open for reading in addition to writing, the page is not marked
- * as Uptodate, it is not dirty or waiting to be committed,
- * indicating that it was previously allocated and then modified,
- * that there were valid bytes of data in that range of the file,
- * and that the new data won't completely replace the old data in
- * that range of the file.
- */
-static int nfs_want_read_modify_write(struct file *file, struct page *page,
-			loff_t pos, unsigned len)
-{
-	unsigned int pglen = nfs_page_length(page);
-	unsigned int offset = pos & (PAGE_CACHE_SIZE - 1);
-	unsigned int end = offset + len;
-
-	if ((file->f_mode & FMODE_READ) &&	/* open for read? */
-	    !PageUptodate(page) &&		/* Uptodate? */
-	    !PagePrivate(page) &&		/* i/o request already? */
-	    pglen &&				/* valid bytes of file? */
-	    (end < pglen || offset))		/* replace all valid bytes? */
-		return 1;
-	return 0;
-}
-
-/*
- * This does the "real" work of the write. We must allocate and lock the
- * page to be sent back to the generic routine, which then copies the
- * data from user space.
- *
- * If the writer ends up delaying the write, the writer needs to
- * increment the page use counts until he is done with the page.
- */
-static int nfs_write_begin(struct file *file, struct address_space *mapping,
-			loff_t pos, unsigned len, unsigned flags,
-			struct page **pagep, void **fsdata)
-{
-	int ret;
-	pgoff_t index = pos >> PAGE_CACHE_SHIFT;
-	struct page *page;
-	int once_thru = 0;
-
-	dfprintk(PAGECACHE, "NFS: write_begin(%s/%s(%ld), %u@%lld)\n",
-		file->f_path.dentry->d_parent->d_name.name,
-		file->f_path.dentry->d_name.name,
-		mapping->host->i_ino, len, (long long) pos);
-
-start:
-	/*
-	 * Prevent starvation issues if someone is doing a consistency
-	 * sync-to-disk
-	 */
-	ret = wait_on_bit(&NFS_I(mapping->host)->flags, NFS_INO_FLUSHING,
-			nfs_wait_bit_killable, TASK_KILLABLE);
-	if (ret)
-		return ret;
-
-	page = grab_cache_page_write_begin(mapping, index, flags);
-	if (!page)
-		return -ENOMEM;
-	*pagep = page;
-
-	ret = nfs_flush_incompatible(file, page);
-	if (ret) {
-		unlock_page(page);
-		page_cache_release(page);
-	} else if (!once_thru &&
-		   nfs_want_read_modify_write(file, page, pos, len)) {
-		once_thru = 1;
-		ret = nfs_readpage(file, page);
-		page_cache_release(page);
-		if (!ret)
-			goto start;
-	}
-	return ret;
-}
-
-static int nfs_write_end(struct file *file, struct address_space *mapping,
-			loff_t pos, unsigned len, unsigned copied,
-			struct page *page, void *fsdata)
-{
-	unsigned offset = pos & (PAGE_CACHE_SIZE - 1);
-	int status;
-
-	dfprintk(PAGECACHE, "NFS: write_end(%s/%s(%ld), %u@%lld)\n",
-		file->f_path.dentry->d_parent->d_name.name,
-		file->f_path.dentry->d_name.name,
-		mapping->host->i_ino, len, (long long) pos);
-
-	/*
-	 * Zero any uninitialised parts of the page, and then mark the page
-	 * as up to date if it turns out that we're extending the file.
-	 */
-	if (!PageUptodate(page)) {
-		unsigned pglen = nfs_page_length(page);
-		unsigned end = offset + len;
-
-		if (pglen == 0) {
-			zero_user_segments(page, 0, offset,
-					end, PAGE_CACHE_SIZE);
-			SetPageUptodate(page);
-		} else if (end >= pglen) {
-			zero_user_segment(page, end, PAGE_CACHE_SIZE);
-			if (offset == 0)
-				SetPageUptodate(page);
-		} else
-			zero_user_segment(page, pglen, PAGE_CACHE_SIZE);
-	}
-
-	status = nfs_updatepage(file, page, offset, copied);
-
-	unlock_page(page);
-	page_cache_release(page);
-
-	if (status < 0)
-		return status;
-	return copied;
-}
-
-/*
- * Partially or wholly invalidate a page
- * - Release the private state associated with a page if undergoing complete
- *   page invalidation
- * - Called if either PG_private or PG_fscache is set on the page
- * - Caller holds page lock
- */
-static void nfs_invalidate_page(struct page *page, unsigned long offset)
-{
-	dfprintk(PAGECACHE, "NFS: invalidate_page(%p, %lu)\n", page, offset);
-
-	if (offset != 0)
-		return;
-	/* Cancel any unstarted writes on this page */
-	nfs_wb_page_cancel(page->mapping->host, page);
-
-	nfs_fscache_invalidate_page(page, page->mapping->host);
-}
-
-/*
- * Attempt to release the private state associated with a page
- * - Called if either PG_private or PG_fscache is set on the page
- * - Caller holds page lock
- * - Return true (may release page) or false (may not)
- */
-static int nfs_release_page(struct page *page, gfp_t gfp)
-{
-	struct address_space *mapping = page->mapping;
-
-	dfprintk(PAGECACHE, "NFS: release_page(%p)\n", page);
-
-	/* Only do I/O if gfp is a superset of GFP_KERNEL */
-	if (mapping && (gfp & GFP_KERNEL) == GFP_KERNEL) {
-		int how = FLUSH_SYNC;
-
-		/* Don't let kswapd deadlock waiting for OOM RPC calls */
-		if (current_is_kswapd())
-			how = 0;
-		nfs_commit_inode(mapping->host, how);
-	}
-	/* If PagePrivate() is set, then the page is not freeable */
-	if (PagePrivate(page))
-		return 0;
-	return nfs_fscache_release_page(page, gfp);
-}
-
-/*
- * Attempt to clear the private state associated with a page when an error
- * occurs that requires the cached contents of an inode to be written back or
- * destroyed
- * - Called if either PG_private or fscache is set on the page
- * - Caller holds page lock
- * - Return 0 if successful, -error otherwise
- */
-static int nfs_launder_page(struct page *page)
-{
-	struct inode *inode = page->mapping->host;
-	struct nfs_inode *nfsi = NFS_I(inode);
-
-	dfprintk(PAGECACHE, "NFS: launder_page(%ld, %llu)\n",
-		inode->i_ino, (long long)page_offset(page));
-
-	nfs_fscache_wait_on_page_write(nfsi, page);
-	return nfs_wb_page(inode, page);
-}
-
-const struct address_space_operations nfs_file_aops = {
-	.readpage = nfs_readpage,
-	.readpages = nfs_readpages,
-	.set_page_dirty = __set_page_dirty_nobuffers,
-	.writepage = nfs_writepage,
-	.writepages = nfs_writepages,
-	.write_begin = nfs_write_begin,
-	.write_end = nfs_write_end,
-	.invalidatepage = nfs_invalidate_page,
-	.releasepage = nfs_release_page,
-	.direct_IO = nfs_direct_IO,
-	.migratepage = nfs_migrate_page,
-	.launder_page = nfs_launder_page,
-	.error_remove_page = generic_error_remove_page,
-};
-
-/*
- * Notification that a PTE pointing to an NFS page is about to be made
- * writable, implying that someone is about to modify the page through a
- * shared-writable mapping
- */
-static int nfs_vm_page_mkwrite(struct vm_area_struct *vma, struct vm_fault *vmf)
-{
-	struct page *page = vmf->page;
-	struct file *filp = vma->vm_file;
-	struct dentry *dentry = filp->f_path.dentry;
-	unsigned pagelen;
-	int ret = VM_FAULT_NOPAGE;
-	struct address_space *mapping;
-
-	dfprintk(PAGECACHE, "NFS: vm_page_mkwrite(%s/%s(%ld), offset %lld)\n",
-		dentry->d_parent->d_name.name, dentry->d_name.name,
-		filp->f_mapping->host->i_ino,
-		(long long)page_offset(page));
-
-	/* make sure the cache has finished storing the page */
-	nfs_fscache_wait_on_page_write(NFS_I(dentry->d_inode), page);
-
-	lock_page(page);
-	mapping = page->mapping;
-	if (mapping != dentry->d_inode->i_mapping)
-		goto out_unlock;
-
-	wait_on_page_writeback(page);
-
-	pagelen = nfs_page_length(page);
-	if (pagelen == 0)
-		goto out_unlock;
-
-	ret = VM_FAULT_LOCKED;
-	if (nfs_flush_incompatible(filp, page) == 0 &&
-	    nfs_updatepage(filp, page, 0, pagelen) == 0)
-		goto out;
-
-	ret = VM_FAULT_SIGBUS;
-out_unlock:
-	unlock_page(page);
-out:
-	return ret;
-}
-
-static const struct vm_operations_struct nfs_file_vm_ops = {
-	.fault = filemap_fault,
-	.page_mkwrite = nfs_vm_page_mkwrite,
-};
-
-static int nfs_need_sync_write(struct file *filp, struct inode *inode)
-{
-	struct nfs_open_context *ctx;
-
-	if (IS_SYNC(inode) || (filp->f_flags & O_DSYNC))
-		return 1;
-	ctx = nfs_file_open_context(filp);
-	if (test_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags))
-		return 1;
-	return 0;
-}
-
-static ssize_t nfs_file_write(struct kiocb *iocb, const struct iovec *iov,
-				unsigned long nr_segs, loff_t pos)
-{
-	struct dentry * dentry = iocb->ki_filp->f_path.dentry;
-	struct inode * inode = dentry->d_inode;
-	unsigned long written = 0;
-	ssize_t result;
-	size_t count = iov_length(iov, nr_segs);
-
-	if (iocb->ki_filp->f_flags & O_DIRECT)
-		return nfs_file_direct_write(iocb, iov, nr_segs, pos);
-
-	dprintk("NFS: write(%s/%s, %lu@%Ld)\n",
-		dentry->d_parent->d_name.name, dentry->d_name.name,
-		(unsigned long) count, (long long) pos);
-
-	result = -EBUSY;
-	if (IS_SWAPFILE(inode))
-		goto out_swapfile;
-	/*
-	 * O_APPEND implies that we must revalidate the file length.
-	 */
-	if (iocb->ki_filp->f_flags & O_APPEND) {
-		result = nfs_revalidate_file_size(inode, iocb->ki_filp);
-		if (result)
-			goto out;
-	}
-
-	result = count;
-	if (!count)
-		goto out;
-
-	result = generic_file_aio_write(iocb, iov, nr_segs, pos);
-	if (result > 0)
-		written = result;
-
-	/* Return error values for O_DSYNC and IS_SYNC() */
-	if (result >= 0 && nfs_need_sync_write(iocb->ki_filp, inode)) {
-		int err = vfs_fsync(iocb->ki_filp, 0);
-		if (err < 0)
-			result = err;
-	}
-	if (result > 0)
-		nfs_add_stats(inode, NFSIOS_NORMALWRITTENBYTES, written);
-out:
-	return result;
-
-out_swapfile:
-	printk(KERN_INFO "NFS: attempt to write to active swap file!\n");
-	goto out;
-}
-
-static ssize_t nfs_file_splice_write(struct pipe_inode_info *pipe,
-				     struct file *filp, loff_t *ppos,
-				     size_t count, unsigned int flags)
-{
-	struct dentry *dentry = filp->f_path.dentry;
-	struct inode *inode = dentry->d_inode;
-	unsigned long written = 0;
-	ssize_t ret;
-
-	dprintk("NFS splice_write(%s/%s, %lu@%llu)\n",
-		dentry->d_parent->d_name.name, dentry->d_name.name,
-		(unsigned long) count, (unsigned long long) *ppos);
-
-	/*
-	 * The combination of splice and an O_APPEND destination is disallowed.
-	 */
-
-	ret = generic_file_splice_write(pipe, filp, ppos, count, flags);
-	if (ret > 0)
-		written = ret;
-
-	if (ret >= 0 && nfs_need_sync_write(filp, inode)) {
-		int err = vfs_fsync(filp, 0);
-		if (err < 0)
-			ret = err;
-	}
-	if (ret > 0)
-		nfs_add_stats(inode, NFSIOS_NORMALWRITTENBYTES, written);
-	return ret;
-}
-
-static int
-do_getlk(struct file *filp, int cmd, struct file_lock *fl, int is_local)
-{
-	struct inode *inode = filp->f_mapping->host;
-	int status = 0;
-	unsigned int saved_type = fl->fl_type;
-
-	/* Try local locking first */
-	posix_test_lock(filp, fl);
-	if (fl->fl_type != F_UNLCK) {
-		/* found a conflict */
-		goto out;
-	}
-	fl->fl_type = saved_type;
-
-	if (nfs_have_delegation(inode, FMODE_READ))
-		goto out_noconflict;
-
-	if (is_local)
-		goto out_noconflict;
-
-	status = NFS_PROTO(inode)->lock(filp, cmd, fl);
-out:
-	return status;
-out_noconflict:
-	fl->fl_type = F_UNLCK;
-	goto out;
-}
-
-static int do_vfs_lock(struct file *file, struct file_lock *fl)
-{
-	int res = 0;
-	switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
-		case FL_POSIX:
-			res = posix_lock_file_wait(file, fl);
-			break;
-		case FL_FLOCK:
-			res = flock_lock_file_wait(file, fl);
-			break;
-		default:
-			BUG();
-	}
-	return res;
-}
-
-static int
-do_unlk(struct file *filp, int cmd, struct file_lock *fl, int is_local)
-{
-	struct inode *inode = filp->f_mapping->host;
-	int status;
-
-	/*
-	 * Flush all pending writes before doing anything
-	 * with locks..
-	 */
-	nfs_sync_mapping(filp->f_mapping);
-
-	/* NOTE: special case
-	 * 	If we're signalled while cleaning up locks on process exit, we
-	 * 	still need to complete the unlock.
-	 */
-	/*
-	 * Use local locking if mounted with "-onolock" or with appropriate
-	 * "-olocal_lock="
-	 */
-	if (!is_local)
-		status = NFS_PROTO(inode)->lock(filp, cmd, fl);
-	else
-		status = do_vfs_lock(filp, fl);
-	return status;
-}
-
-static int
-is_time_granular(struct timespec *ts) {
-	return ((ts->tv_sec == 0) && (ts->tv_nsec <= 1000));
-}
-
-static int
-do_setlk(struct file *filp, int cmd, struct file_lock *fl, int is_local)
-{
-	struct inode *inode = filp->f_mapping->host;
-	int status;
-
-	/*
-	 * Flush all pending writes before doing anything
-	 * with locks..
-	 */
-	status = nfs_sync_mapping(filp->f_mapping);
-	if (status != 0)
-		goto out;
-
-	/*
-	 * Use local locking if mounted with "-onolock" or with appropriate
-	 * "-olocal_lock="
-	 */
-	if (!is_local)
-		status = NFS_PROTO(inode)->lock(filp, cmd, fl);
-	else
-		status = do_vfs_lock(filp, fl);
-	if (status < 0)
-		goto out;
-
-	/*
-	 * Revalidate the cache if the server has time stamps granular
-	 * enough to detect subsecond changes.  Otherwise, clear the
-	 * cache to prevent missing any changes.
-	 *
-	 * This makes locking act as a cache coherency point.
-	 */
-	nfs_sync_mapping(filp->f_mapping);
-	if (!nfs_have_delegation(inode, FMODE_READ)) {
-		if (is_time_granular(&NFS_SERVER(inode)->time_delta))
-			__nfs_revalidate_inode(NFS_SERVER(inode), inode);
-		else
-			nfs_zap_caches(inode);
-	}
-out:
-	return status;
-}
-
-/*
- * Lock a (portion of) a file
- */
-static int nfs_lock(struct file *filp, int cmd, struct file_lock *fl)
-{
-	struct inode *inode = filp->f_mapping->host;
-	int ret = -ENOLCK;
-	int is_local = 0;
-
-	dprintk("NFS: lock(%s/%s, t=%x, fl=%x, r=%lld:%lld)\n",
-			filp->f_path.dentry->d_parent->d_name.name,
-			filp->f_path.dentry->d_name.name,
-			fl->fl_type, fl->fl_flags,
-			(long long)fl->fl_start, (long long)fl->fl_end);
-
-	nfs_inc_stats(inode, NFSIOS_VFSLOCK);
-
-	/* No mandatory locks over NFS */
-	if (__mandatory_lock(inode) && fl->fl_type != F_UNLCK)
-		goto out_err;
-
-	if (NFS_SERVER(inode)->flags & NFS_MOUNT_LOCAL_FCNTL)
-		is_local = 1;
-
-	if (NFS_PROTO(inode)->lock_check_bounds != NULL) {
-		ret = NFS_PROTO(inode)->lock_check_bounds(fl);
-		if (ret < 0)
-			goto out_err;
-	}
-
-	if (IS_GETLK(cmd))
-		ret = do_getlk(filp, cmd, fl, is_local);
-	else if (fl->fl_type == F_UNLCK)
-		ret = do_unlk(filp, cmd, fl, is_local);
-	else
-		ret = do_setlk(filp, cmd, fl, is_local);
-out_err:
-	return ret;
-}
-
-/*
- * Lock a (portion of) a file
- */
-static int nfs_flock(struct file *filp, int cmd, struct file_lock *fl)
-{
-	struct inode *inode = filp->f_mapping->host;
-	int is_local = 0;
-
-	dprintk("NFS: flock(%s/%s, t=%x, fl=%x)\n",
-			filp->f_path.dentry->d_parent->d_name.name,
-			filp->f_path.dentry->d_name.name,
-			fl->fl_type, fl->fl_flags);
-
-	if (!(fl->fl_flags & FL_FLOCK))
-		return -ENOLCK;
-
-	if (NFS_SERVER(inode)->flags & NFS_MOUNT_LOCAL_FLOCK)
-		is_local = 1;
-
-	/* We're simulating flock() locks using posix locks on the server */
-	fl->fl_owner = (fl_owner_t)filp;
-	fl->fl_start = 0;
-	fl->fl_end = OFFSET_MAX;
-
-	if (fl->fl_type == F_UNLCK)
-		return do_unlk(filp, cmd, fl, is_local);
-	return do_setlk(filp, cmd, fl, is_local);
-}
-
-/*
- * There is no protocol support for leases, so we have no way to implement
- * them correctly in the face of opens by other clients.
- */
-static int nfs_setlease(struct file *file, long arg, struct file_lock **fl)
-{
-	dprintk("NFS: setlease(%s/%s, arg=%ld)\n",
-			file->f_path.dentry->d_parent->d_name.name,
-			file->f_path.dentry->d_name.name, arg);
-	return -EINVAL;
-}
-
-const struct file_operations nfs_file_operations = {
-	.llseek		= nfs_file_llseek,
-	.read		= do_sync_read,
-	.write		= do_sync_write,
-	.aio_read	= nfs_file_read,
-	.aio_write	= nfs_file_write,
-	.mmap		= nfs_file_mmap,
-	.open		= nfs_file_open,
-	.flush		= nfs_file_flush,
-	.release	= nfs_file_release,
-	.fsync		= nfs_file_fsync,
-	.lock		= nfs_lock,
-	.flock		= nfs_flock,
-	.splice_read	= nfs_file_splice_read,
-	.splice_write	= nfs_file_splice_write,
-	.check_flags	= nfs_check_flags,
-	.setlease	= nfs_setlease,
-};
-
-#ifdef CONFIG_NFS_V4
-static int
-nfs4_file_open(struct inode *inode, struct file *filp)
-{
-	/*
-	 * NFSv4 opens are handled in d_lookup and d_revalidate. If we get to
-	 * this point, then something is very wrong
-	 */
-	dprintk("NFS: %s called! inode=%p filp=%p\n", __func__, inode, filp);
-	return -ENOTDIR;
-}
-
-const struct file_operations nfs4_file_operations = {
-	.llseek		= nfs_file_llseek,
-	.read		= do_sync_read,
-	.write		= do_sync_write,
-	.aio_read	= nfs_file_read,
-	.aio_write	= nfs_file_write,
-	.mmap		= nfs_file_mmap,
-	.open		= nfs4_file_open,
-	.flush		= nfs_file_flush,
-	.release	= nfs_file_release,
-	.fsync		= nfs_file_fsync,
-	.lock		= nfs_lock,
-	.flock		= nfs_flock,
-	.splice_read	= nfs_file_splice_read,
-	.splice_write	= nfs_file_splice_write,
-	.check_flags	= nfs_check_flags,
-	.setlease	= nfs_setlease,
-};
-#endif /* CONFIG_NFS_V4 */