nfs_page.h File Reference

#include <linux/list.h>
#include <linux/pagemap.h>
#include <linux/wait.h>
#include <linux/sunrpc/auth.h>
#include <linux/nfs_xdr.h>
#include <linux/kref.h>

Go to the source code of this file.

Data Structures
struct	nfs_page
struct	nfs_pageio_ops
struct	nfs_pageio_descriptor

Macros
#define	NFS_WBACK_BUSY(req)   (test_bit(PG_BUSY,&(req)->wb_flags))

Enumerations
enum	{   PG_BUSY = 0, PG_MAPPED, PG_CLEAN, PG_NEED_COMMIT,   PG_NEED_RESCHED, PG_COMMIT_TO_DS }

Functions
struct nfs_page *	nfs_create_request (struct nfs_open_context *ctx, struct inode *inode, struct page *page, unsigned int offset, unsigned int count)
void	nfs_release_request (struct nfs_page *req)
void	nfs_pageio_init (struct nfs_pageio_descriptor *desc, struct inode *inode, const struct nfs_pageio_ops *pg_ops, const struct nfs_pgio_completion_ops *compl_ops, size_t bsize, int how)
int	nfs_pageio_add_request (struct nfs_pageio_descriptor *, struct nfs_page *)
void	nfs_pageio_complete (struct nfs_pageio_descriptor *desc)
void	nfs_pageio_cond_complete (struct nfs_pageio_descriptor *, pgoff_t)
bool	nfs_generic_pg_test (struct nfs_pageio_descriptor *desc, struct nfs_page *prev, struct nfs_page *req)
int	nfs_wait_on_request (struct nfs_page *)
void	nfs_unlock_request (struct nfs_page *req)
void	nfs_unlock_and_release_request (struct nfs_page *req)

Macro Definition Documentation

#define NFS_WBACK_BUSY

(

req

)

(test_bit(PG_BUSY,&(req)->wb_flags))

Definition at line 75 of file nfs_page.h.

Enumeration Type Documentation

anonymous enum

Enumerator:

PG_BUSY
PG_MAPPED
PG_CLEAN
PG_NEED_COMMIT
PG_NEED_RESCHED
PG_COMMIT_TO_DS

Definition at line 24 of file nfs_page.h.

Function Documentation

struct nfs_page* nfs_create_request ( struct nfs_open_context *  ctx, struct inode *  inode, struct page *  page, unsigned int  offset, unsigned int  count  )

read

Definition at line 100 of file pagelist.c.

bool nfs_generic_pg_test	(	struct nfs_pageio_descriptor *	desc,
		struct nfs_page *	prev,
		struct nfs_page *	req
	)

Definition at line 229 of file pagelist.c.

int nfs_pageio_add_request	(	struct nfs_pageio_descriptor *	,
		struct nfs_page *
	)

Definition at line 405 of file pagelist.c.

void nfs_pageio_complete

(

struct nfs_pageio_descriptor *

desc

)

nfs_pageio_complete - Complete I/O on an nfs_pageio_descriptor : pointer to io descriptor

Definition at line 426 of file pagelist.c.

void nfs_pageio_cond_complete	(	struct nfs_pageio_descriptor *	desc,
		pgoff_t	index
	)

nfs_pageio_cond_complete - Conditional I/O completion : pointer to io descriptor : page index

It is important to ensure that processes don't try to take locks on non-contiguous ranges of pages as that might deadlock. This function should be called before attempting to wait on a locked nfs_page. It will complete the I/O if the page index 'index' is not contiguous with the existing list of pages in 'desc'.

Definition at line 449 of file pagelist.c.

void nfs_pageio_init	(	struct nfs_pageio_descriptor *	desc,
		struct inode *	inode,
		const struct nfs_pageio_ops *	pg_ops,
		const struct nfs_pgio_completion_ops *	compl_ops,
		size_t	bsize,
		int	io_flags
	)

nfs_pageio_init - initialise a page io descriptor : pointer to descriptor : pointer to inode : pointer to io function : io block size : extra parameters for the io function

Definition at line 253 of file pagelist.c.

void nfs_release_request

(

struct nfs_page *

req

)

Definition at line 203 of file pagelist.c.

void nfs_unlock_and_release_request

(

struct nfs_page *

req

)

nfs_unlock_and_release_request - Unlock request and release the nfs_page :

Definition at line 154 of file pagelist.c.

void nfs_unlock_request

(

struct nfs_page *

req

)

nfs_unlock_request - Unlock request and wake up sleepers. :

Definition at line 138 of file pagelist.c.

int nfs_wait_on_request

(

struct nfs_page *

req

)

nfs_wait_on_request - Wait for a request to complete. : request to wait upon.

Interruptible by fatal signals only. The user is responsible for holding a count on the request.

Definition at line 222 of file pagelist.c.