This converts f2fs_nat_block and f2fs_sit_block to be variable length
arrays. This does not change the way they are accessed, but removes a
misleading statment that these sizes are fixed, as opposed to deriving
from F2FS_BLKSIZE
Signed-off-by: Daniel Rosenberg <dro...@google.com>
---
include/f2fs_fs.h | 20 ++++++++++++++------
1 file changed, 14 insertions(+), 6 deletions(-)
diff --git a/include/f2fs_fs.h b/include/f2fs_fs.h
index 13a1c14..4c213dd 100644
--- a/include/f2fs_fs.h
+++ b/include/f2fs_fs.h
@@ -1119,11 +1119,9 @@ struct f2fs_nat_entry {
static_assert(sizeof(struct f2fs_nat_entry) == 9, "");
struct f2fs_nat_block {
- struct f2fs_nat_entry entries[NAT_ENTRY_PER_BLOCK];
+ struct f2fs_nat_entry entries[0]; /* NAT_ENTRY_PER_BLOCK */
};
-static_assert(sizeof(struct f2fs_nat_block) == F2FS_BLKSIZE - (F2FS_BLKSIZE %
9), "");
-
/*
* For SIT entries
*
@@ -1169,12 +1167,14 @@ struct f2fs_sit_entry {
static_assert(sizeof(struct f2fs_sit_entry) == 74, "");
+/*
+ * On disk layout is:
+ * struct f2fs_sit_entry entries[SIT_ENTRY_PER_BLOCK];
+ */
struct f2fs_sit_block {
- struct f2fs_sit_entry entries[SIT_ENTRY_PER_BLOCK];
+ struct f2fs_sit_entry entries[0];
};
-static_assert(sizeof(struct f2fs_sit_block) == F2FS_BLKSIZE - (F2FS_BLKSIZE %
74), "");
-
/*
* For segment summary
*
@@ -1995,6 +1995,14 @@ static inline void check_block_struct_sizes(void)
/* Check Indirect Block Size */
assert(NIDS_PER_BLOCK * sizeof(__le32) + sizeof(struct node_footer) ==
F2FS_BLKSIZE);
+
+ /* Check NAT Block Size */
+ assert((NAT_ENTRY_PER_BLOCK + 1) * sizeof(struct f2fs_nat_entry) >
F2FS_BLKSIZE);
+ assert(NAT_ENTRY_PER_BLOCK * sizeof(struct f2fs_nat_entry) <=
F2FS_BLKSIZE);
+
+ /* Check SIT Block Size */
+ assert((SIT_ENTRY_PER_BLOCK + 1) * sizeof(struct f2fs_sit_entry) >
F2FS_BLKSIZE);
+ assert(SIT_ENTRY_PER_BLOCK * sizeof(struct f2fs_sit_entry) <=
F2FS_BLKSIZE);
}
#endif /*__F2FS_FS_H */
--
2.42.0.rc2.253.gd59a3bf2b4-goog
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