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Commit 41a099de authored by Fan Li's avatar Fan Li Committed by Jaegeuk Kim
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f2fs: drop largest extent by range 



now we update extent by range, fofs may not be on the largest
extent if the new extent overlaps with it. so add a new function
to drop largest extent properly.

Signed-off-by: default avatarFan li <fanofcode.li@samsung.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent a7230d16

fs/f2fs/extent_cache.c

+5 −4
Original line number Diff line number Diff line
@@ -155,11 +155,12 @@ static unsigned int __free_extent_tree(struct f2fs_sb_info *sbi, 
	return count - et->count;

}



static void __drop_largest_extent(struct inode *inode, pgoff_t fofs)

static void __drop_largest_extent(struct inode *inode,

					pgoff_t fofs, unsigned int len)

{

	struct extent_info *largest = &F2FS_I(inode)->extent_tree->largest;



	if (largest->fofs <= fofs && largest->fofs + largest->len > fofs)

	if (fofs < largest->fofs + largest->len && fofs + len > largest->fofs)

		largest->len = 0;

}
@@ -168,7 +169,7 @@ void f2fs_drop_largest_extent(struct inode *inode, pgoff_t fofs) 
	if (!f2fs_may_extent_tree(inode))

		return;



	__drop_largest_extent(inode, fofs);

	__drop_largest_extent(inode, fofs, 1);

}



void f2fs_init_extent_tree(struct inode *inode, struct f2fs_extent *i_ext)
@@ -422,7 +423,7 @@ static unsigned int f2fs_update_extent_tree_range(struct inode *inode, 
	dei.len = 0;



	/* we do not guarantee that the largest extent is cached all the time */

	__drop_largest_extent(inode, fofs);

	__drop_largest_extent(inode, fofs, len);



	/* 1. lookup first extent node in range [fofs, fofs + len - 1] */

	en = __lookup_extent_tree_ret(et, fofs, &prev_en, &next_en,