page_cache.h File Reference

#include "mos/filesystem/vfs_types.h"
#include "mos/mm/physical/pmm.h"

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Functions
phyframe_t *	pagecache_get_page_for_read (inode_cache_t *cache, off_t pgoff)
	Get a page from the page cache.
phyframe_t *	pagecache_get_page_for_write (inode_cache_t *cache, off_t pgoff)
	Get a page from the page cache for writing.
ssize_t	vfs_read_pagecache (inode_cache_t *icache, void *buf, size_t size, off_t offset)
ssize_t	vfs_write_pagecache (inode_cache_t *icache, const void *buf, size_t total_size, off_t offset)
long	pagecache_flush_or_drop (inode_cache_t *icache, off_t pgoff, size_t npages, bool drop_page)
	Flush or drop a range of pages from the page cache.
long	pagecache_flush_or_drop_all (inode_cache_t *icache, bool drop_page)
	Flush or drop all pages in the page cache.

Function Documentation

pagecache_get_page_for_read()

phyframe_t * pagecache_get_page_for_read	(	inode_cache_t *	cache,
		off_t	pgoff )

Get a page from the page cache.

Parameters

cache	The inode cache
pgoff	The page offset

Returns

phyframe_t* The page, or NULL if it doesn't exist

Note

Caller must hold the cache's lock

Definition at line 85 of file page_cache.c.

Referenced by pagecache_get_page_for_write(), vfs_fault_handler(), and vfs_read_pagecache().

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pagecache_get_page_for_write()

phyframe_t * pagecache_get_page_for_write	(	inode_cache_t *	cache,
		off_t	pgoff )

Get a page from the page cache for writing.

Parameters

cache	The inode cache
pgoff	The page offset

Returns

phyframe_t* The page

Definition at line 103 of file page_cache.c.

Referenced by simple_page_write_begin().

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vfs_read_pagecache()

ssize_t vfs_read_pagecache	(	inode_cache_t *	icache,
		void *	buf,
		size_t	size,
		off_t	offset )

Definition at line 108 of file page_cache.c.

Referenced by vfs_generic_read().

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vfs_write_pagecache()

ssize_t vfs_write_pagecache	(	inode_cache_t *	icache,
		const void *	buf,
		size_t	total_size,
		off_t	offset )

Definition at line 137 of file page_cache.c.

Referenced by vfs_generic_write().

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pagecache_flush_or_drop()

long pagecache_flush_or_drop	(	inode_cache_t *	icache,
		off_t	pgoff,
		size_t	npages,
		bool	drop_page )

Flush or drop a range of pages from the page cache.

Parameters

icache	The inode cache
pgoff	The starting page offset
npages	The number of pages to flush or drop
drop_page	Whether to drop the pages, or just flush them

Returns

long

Definition at line 56 of file page_cache.c.

Referenced by do_pagecache_flush().

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pagecache_flush_or_drop_all()

long pagecache_flush_or_drop_all	(	inode_cache_t *	icache,
		bool	drop_page )

Flush or drop all pages in the page cache.

Parameters

icache	The inode cache
drop_page	Whether to drop the pages, or just flush them

Returns

long

Definition at line 78 of file page_cache.c.

Referenced by do_pagecache_flush(), and inode_try_drop().

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