mirror of https://github.com/reactos/reactos.git
69 lines
1.7 KiB
C
69 lines
1.7 KiB
C
#include <ext2fs.h>
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#include <linux/module.h>
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#include <linux/errno.h>
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/*
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* extents_bread: This function is a wrapper of CcPinRead routine.
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*
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* @sb: the device we need to undergo buffered IO on.
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* @block: the block we want to read from.
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*
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* If the call to this routine succeeds, the pages underlying the buffer header
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* will be locked into memory, so that the buffer header returned for use is safe.
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*/
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struct buffer_head *
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extents_bread(struct super_block *sb, sector_t block)
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{
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return sb_getblk(sb, block);
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}
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/*
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* extents_bwrite: This function is a wrapper of CcPreparePinWrite routine.
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*
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* @sb: the device we need to undergo buffered IO on.
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* @block: the block we want to write to.
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*/
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struct buffer_head *
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extents_bwrite(struct super_block *sb, sector_t block)
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{
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return sb_getblk_zero(sb, block);
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}
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/*
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* extents_mark_buffer_dirty: Mark the buffer dirtied and so
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* that changes will be written back.
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*
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* @bh: The corresponding buffer header that is modified.
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*/
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void extents_mark_buffer_dirty(struct buffer_head *bh)
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{
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set_buffer_dirty(bh);
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}
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/*
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* extents_brelse: Release the corresponding buffer header.
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*
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* @bh: The corresponding buffer header that is going to be freed.
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*
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* The pages underlying the buffer header will be unlocked.
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*/
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void extents_brelse(struct buffer_head *bh)
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{
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brelse(bh);
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}
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/*
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* extents_bforget: Release the corresponding buffer header.
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* NOTE: The page owned by @bh will be marked invalidated.
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*
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* @bh: The corresponding buffer header that is going to be freed.
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*
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* The pages underlying the buffer header will be unlocked.
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*/
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void extents_bforget(struct buffer_head *bh)
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{
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clear_buffer_uptodate(bh);
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bforget(bh);
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}
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