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authorJaegeuk Kim <jaegeuk@kernel.org>2014-09-16 01:50:48 +0400
committerJaegeuk Kim <jaegeuk@kernel.org>2014-09-23 22:10:15 +0400
commit88bd02c9472a166b706284a34a84f1243322d782 (patch)
treea729dceea6c10c86b8c2a1e7b2fa1355d1143ba3 /fs/f2fs/node.h
parent7ef35e3b9e7a99db4930b58b33a94455dbf53276 (diff)
downloadlinux-88bd02c9472a166b706284a34a84f1243322d782.tar.xz
f2fs: fix conditions to remain recovery information in f2fs_sync_file
This patch revisited whole the recovery information during the f2fs_sync_file. In this patch, there are three information to make a decision. a) IS_CHECKPOINTED, /* is it checkpointed before? */ b) HAS_FSYNCED_INODE, /* is the inode fsynced before? */ c) HAS_LAST_FSYNC, /* has the latest node fsync mark? */ And, the scenarios for our rule are based on: [Term] F: fsync_mark, D: dentry_mark 1. inode(x) | CP | inode(x) | dnode(F) 2. inode(x) | CP | inode(F) | dnode(F) 3. inode(x) | CP | dnode(F) | inode(x) | inode(F) 4. inode(x) | CP | dnode(F) | inode(F) 5. CP | inode(x) | dnode(F) | inode(DF) 6. CP | inode(DF) | dnode(F) 7. CP | dnode(F) | inode(DF) 8. CP | dnode(F) | inode(x) | inode(DF) For example, #3, the three conditions should be changed as follows. inode(x) | CP | dnode(F) | inode(x) | inode(F) a) x o o o o b) x x x x o c) x o o x o If f2fs_sync_file stops ------^, it should write inode(F) --------------^ So, the need_inode_block_update should return true, since c) get_nat_flag(e, HAS_LAST_FSYNC), is false. For example, #8, CP | alloc | dnode(F) | inode(x) | inode(DF) a) o x x x x b) x x x o c) o o x o If f2fs_sync_file stops -------^, it should write inode(DF) --------------^ Note that, the roll-forward policy should follow this rule, which means, if there are any missing blocks, we doesn't need to recover that inode. Signed-off-by: Huang Ying <ying.huang@intel.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/node.h')
-rw-r--r--fs/f2fs/node.h21
1 files changed, 12 insertions, 9 deletions
diff --git a/fs/f2fs/node.h b/fs/f2fs/node.h
index 3043778d805b..b8ba63c43b99 100644
--- a/fs/f2fs/node.h
+++ b/fs/f2fs/node.h
@@ -41,7 +41,8 @@ struct node_info {
enum {
IS_CHECKPOINTED, /* is it checkpointed before? */
- HAS_FSYNC_MARK, /* has the latest node fsync mark? */
+ HAS_FSYNCED_INODE, /* is the inode fsynced before? */
+ HAS_LAST_FSYNC, /* has the latest node fsync mark? */
};
struct nat_entry {
@@ -60,15 +61,9 @@ struct nat_entry {
#define nat_set_version(nat, v) (nat->ni.version = v)
#define __set_nat_cache_dirty(nm_i, ne) \
- do { \
- set_nat_flag(ne, IS_CHECKPOINTED, false); \
- list_move_tail(&ne->list, &nm_i->dirty_nat_entries); \
- } while (0)
+ list_move_tail(&ne->list, &nm_i->dirty_nat_entries);
#define __clear_nat_cache_dirty(nm_i, ne) \
- do { \
- set_nat_flag(ne, IS_CHECKPOINTED, true); \
- list_move_tail(&ne->list, &nm_i->nat_entries); \
- } while (0)
+ list_move_tail(&ne->list, &nm_i->nat_entries);
#define inc_node_version(version) (++version)
static inline void set_nat_flag(struct nat_entry *ne,
@@ -87,6 +82,14 @@ static inline bool get_nat_flag(struct nat_entry *ne, unsigned int type)
return ne->flag & mask;
}
+static inline void nat_reset_flag(struct nat_entry *ne)
+{
+ /* these states can be set only after checkpoint was done */
+ set_nat_flag(ne, IS_CHECKPOINTED, true);
+ set_nat_flag(ne, HAS_FSYNCED_INODE, false);
+ set_nat_flag(ne, HAS_LAST_FSYNC, true);
+}
+
static inline void node_info_from_raw_nat(struct node_info *ni,
struct f2fs_nat_entry *raw_ne)
{