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Subject[PATCH 3/3] f2fs: should use a temp extent_info for lookup
Date
Otherwise, __lookup_extent_tree() will override the given extent_info which will
be used by caller.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
---
fs/f2fs/extent_cache.c | 13 +++++++------
1 file changed, 7 insertions(+), 6 deletions(-)

diff --git a/fs/f2fs/extent_cache.c b/fs/f2fs/extent_cache.c
index 7bd1e1832412..a510fa57a823 100644
--- a/fs/f2fs/extent_cache.c
+++ b/fs/f2fs/extent_cache.c
@@ -888,6 +888,7 @@ static int __get_new_block_age(struct inode *inode, struct extent_info *ei,
loff_t f_size = i_size_read(inode);
unsigned long long cur_blocks =
atomic64_read(&sbi->allocated_data_blocks);
+ struct extent_info tei = *ei; /* only fofs and len are valid */

/*
* When I/O is not aligned to a PAGE_SIZE, update will happen to the last
@@ -898,17 +899,17 @@ static int __get_new_block_age(struct inode *inode, struct extent_info *ei,
blkaddr == NEW_ADDR)
return -EINVAL;

- if (__lookup_extent_tree(inode, ei->fofs, ei, EX_BLOCK_AGE)) {
+ if (__lookup_extent_tree(inode, ei->fofs, &tei, EX_BLOCK_AGE)) {
unsigned long long cur_age;

- if (cur_blocks >= ei->last_blocks)
- cur_age = cur_blocks - ei->last_blocks;
+ if (cur_blocks >= tei.last_blocks)
+ cur_age = cur_blocks - tei.last_blocks;
else
/* allocated_data_blocks overflow */
- cur_age = ULLONG_MAX - ei->last_blocks + cur_blocks;
+ cur_age = ULLONG_MAX - tei.last_blocks + cur_blocks;

- if (ei->age)
- ei->age = __calculate_block_age(cur_age, ei->age);
+ if (tei.age)
+ ei->age = __calculate_block_age(cur_age, tei.age);
else
ei->age = cur_age;
ei->last_blocks = cur_blocks;
--
2.39.0.314.g84b9a713c41-goog
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