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authorFan Li <fanofcode.li@samsung.com>2015-09-17 12:24:17 +0200
committerJaegeuk Kim <jaegeuk@kernel.org>2015-10-10 01:20:51 +0200
commit41a099de3a8d2b570147445c5cddc59c0daf5e96 (patch)
tree2e3fdd8b94760f4b1d2e7c26bc6fa1d085dd2f20 /fs/f2fs/extent_cache.c
parentf2fs: check end_io for metapages before making next checkpoint blocks (diff)
downloadlinux-41a099de3a8d2b570147445c5cddc59c0daf5e96.tar.xz
linux-41a099de3a8d2b570147445c5cddc59c0daf5e96.zip
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: Fan li <fanofcode.li@samsung.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/extent_cache.c')
-rw-r--r--fs/f2fs/extent_cache.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/fs/f2fs/extent_cache.c b/fs/f2fs/extent_cache.c
index 63068b75b1bd..2f013e22b7bb 100644
--- a/fs/f2fs/extent_cache.c
+++ b/fs/f2fs/extent_cache.c
@@ -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,