[PATCH v4 11/24] read-cache: make in-memory format aware of stat_crc
- From
Thomas Gummerer <t.gummerer@gmail.com>
- Date
- Nov 27, 2013, 12:00 UTC
- Message-ID
- <1385553659-9928-12-git-send-email-t.gummerer@gmail.com>
- In-Reply-To
- <1385553659-9928-1-git-send-email-t.gummerer@gmail.com>
Make the in-memory format aware of the stat_crc used by index-v5. It is simply ignored by index version prior to v5.
Signed-off-by: Thomas Gummerer <t.gummerer@gmail.com> --- cache.h | 1 + read-cache.c | 25 +++++++++++++++++++++++++ 2 files changed, 26 insertions(+)
diff --git a/cache.h b/cache.h index 38d57e7..8c2ccc4 100644 --- a/cache.h +++ b/cache.h @@ -127,6 +127,7 @@ struct cache_entry { unsigned int ce_flags; unsigned int ce_namelen; unsigned char sha1[20]; + uint32_t ce_stat_crc; struct cache_entry *next; /* used by name_hash */ char name[FLEX_ARRAY]; /* more */ }; diff --git a/read-cache.c b/read-cache.c index 7020f26..baa052c 100644 --- a/read-cache.c +++ b/read-cache.c @@ -106,6 +106,29 @@ int match_stat_data(const struct stat_data *sd, struct stat *st) return changed; } +static uint32_t calculate_stat_crc(struct cache_entry *ce) +{ + unsigned int ctimens = 0; + uint32_t stat, stat_crc; + + stat = htonl(ce->ce_stat_data.sd_ctime.sec); + stat_crc = crc32(0, (Bytef*)&stat, 4); +#ifdef USE_NSEC + ctimens = ce->ce_stat_data.sd_ctime.nsec; +#endif + stat = htonl(ctimens); + stat_crc = crc32(stat_crc, (Bytef*)&stat, 4); + stat = htonl(ce->ce_stat_data.sd_ino); + stat_crc = crc32(stat_crc, (Bytef*)&stat, 4); + stat = htonl(ce->ce_stat_data.sd_dev); + stat_crc = crc32(stat_crc, (Bytef*)&stat, 4); + stat = htonl(ce->ce_stat_data.sd_uid); + stat_crc = crc32(stat_crc, (Bytef*)&stat, 4); + stat = htonl(ce->ce_stat_data.sd_gid); + stat_crc = crc32(stat_crc, (Bytef*)&stat, 4); + return stat_crc; +} + /* * This only updates the "non-critical" parts of the directory * cache, ie the parts that aren't tracked by GIT, and only used @@ -120,6 +143,8 @@ void fill_stat_cache_info(struct cache_entry *ce, struct stat *st) if (S_ISREG(st->st_mode)) ce_mark_uptodate(ce); + + ce->ce_stat_crc = calculate_stat_crc(ce); } static int ce_compare_data(const struct cache_entry *ce, struct stat *st)
-- 1.8.4.2