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f2fs: introduce a flag to represent each nat entry information

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This patch introduces a flag in the nat entry structure to merge various
information such as checkpointed and fsync_done marks.

Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Jaegeuk Kim
2014-09-15 12:07:13 -07:00
parent 4c521f493b
commit 7ef35e3b9e
2 changed files with 31 additions and 10 deletions
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28
fs/f2fs/node.h
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@@ -39,10 +39,14 @@ struct node_info {
unsigned char version; /* version of the node */
};
enum {
IS_CHECKPOINTED, /* is it checkpointed before? */
HAS_FSYNC_MARK, /* has the latest node fsync mark? */
};
struct nat_entry {
struct list_head list; /* for clean or dirty nat list */
bool checkpointed; /* whether it is checkpointed or not */
bool fsync_done; /* whether the latest node has fsync mark */
unsigned char flag; /* for node information bits */
struct node_info ni; /* in-memory node information */
};
@@ -57,16 +61,32 @@ struct nat_entry {
#define __set_nat_cache_dirty(nm_i, ne) \
do { \
ne->checkpointed = false; \
set_nat_flag(ne, IS_CHECKPOINTED, false); \
list_move_tail(&ne->list, &nm_i->dirty_nat_entries); \
} while (0)
#define __clear_nat_cache_dirty(nm_i, ne) \
do { \
ne->checkpointed = true; \
set_nat_flag(ne, IS_CHECKPOINTED, true); \
list_move_tail(&ne->list, &nm_i->nat_entries); \
} while (0)
#define inc_node_version(version) (++version)
static inline void set_nat_flag(struct nat_entry *ne,
unsigned int type, bool set)
{
unsigned char mask = 0x01 << type;
if (set)
ne->flag |= mask;
else
ne->flag &= ~mask;
}
static inline bool get_nat_flag(struct nat_entry *ne, unsigned int type)
{
unsigned char mask = 0x01 << type;
return ne->flag & mask;
}
static inline void node_info_from_raw_nat(struct node_info *ni,
struct f2fs_nat_entry *raw_ne)
{