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NFS: Add debugging facility for NFS aops 

Recent work in fs/nfs/file.c neglected to add appropriate trace debugging
for the NFS client's address space operations.

Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Chuck Lever 2008-06-11 17:55:50 -04:00 committed by Trond Myklebust
parent cc0dd2d105
commit b7eaefaa87
1 changed files with 27 additions and 2 deletions
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29
fs/nfs/file.c
View File

@ -335,6 +335,11 @@ static int nfs_write_begin(struct file *file, struct address_space *mapping,
struct page *page;
index = pos >> PAGE_CACHE_SHIFT;
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);
page = __grab_cache_page(mapping, index);
if (!page)
return -ENOMEM;
@ -355,6 +360,11 @@ static int nfs_write_end(struct file *file, struct address_space *mapping,
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.
@ -389,6 +399,8 @@ static int nfs_write_end(struct file *file, struct address_space *mapping,
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 */
@ -397,13 +409,20 @@ static void nfs_invalidate_page(struct page *page, unsigned long offset)
static int nfs_release_page(struct page *page, gfp_t gfp)
{
dfprintk(PAGECACHE, "NFS: release_page(%p)\n", page);
/* If PagePrivate() is set, then the page is not freeable */
return 0;
}
static int nfs_launder_page(struct page *page)
{
return nfs_wb_page(page->mapping->host, page);
struct inode *inode = page->mapping->host;
dfprintk(PAGECACHE, "NFS: launder_page(%ld, %llu)\n",
inode->i_ino, (long long)page_offset(page));
return nfs_wb_page(inode, page);
}
const struct address_space_operations nfs_file_aops = {
@ -423,13 +442,19 @@ const struct address_space_operations nfs_file_aops = {
static int nfs_vm_page_mkwrite(struct vm_area_struct *vma, struct page *page)
{
struct file *filp = vma->vm_file;
struct dentry *dentry = filp->f_path.dentry;
unsigned pagelen;
int ret = -EINVAL;
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));
lock_page(page);
mapping = page->mapping;
if (mapping != vma->vm_file->f_path.dentry->d_inode->i_mapping)
if (mapping != dentry->d_inode->i_mapping)
goto out_unlock;
ret = 0;