diff options
author | Michael Haggerty <mhagger@alum.mit.edu> | 2013-06-20 12:37:50 +0400 |
---|---|---|
committer | Junio C Hamano <gitster@pobox.com> | 2013-06-21 02:50:17 +0400 |
commit | c21d39d7c7eb07eed0be301a72856bff65201256 (patch) | |
tree | 694012453e32b8ff4f241319e6fdc8836abb3fa6 | |
parent | 4f6b83e3708943c3b3f4ac911da7d0c30019c20a (diff) |
Extract a struct stat_data from cache_entry
Add public functions fill_stat_data() and match_stat_data() to work
with it. This infrastructure will later be used to check the validity
of other types of file.
Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
-rw-r--r-- | builtin/ls-files.c | 12 | ||||
-rw-r--r-- | cache.h | 33 | ||||
-rw-r--r-- | read-cache.c | 151 |
3 files changed, 116 insertions, 80 deletions
diff --git a/builtin/ls-files.c b/builtin/ls-files.c index 22020729cb..6a0730f720 100644 --- a/builtin/ls-files.c +++ b/builtin/ls-files.c @@ -165,11 +165,13 @@ static void show_ce_entry(const char *tag, struct cache_entry *ce) } write_name(ce->name, ce_namelen(ce)); if (debug_mode) { - printf(" ctime: %d:%d\n", ce->ce_ctime.sec, ce->ce_ctime.nsec); - printf(" mtime: %d:%d\n", ce->ce_mtime.sec, ce->ce_mtime.nsec); - printf(" dev: %d\tino: %d\n", ce->ce_dev, ce->ce_ino); - printf(" uid: %d\tgid: %d\n", ce->ce_uid, ce->ce_gid); - printf(" size: %d\tflags: %x\n", ce->ce_size, ce->ce_flags); + struct stat_data *sd = &ce->ce_stat_data; + + printf(" ctime: %d:%d\n", sd->sd_ctime.sec, sd->sd_ctime.nsec); + printf(" mtime: %d:%d\n", sd->sd_mtime.sec, sd->sd_mtime.nsec); + printf(" dev: %d\tino: %d\n", sd->sd_dev, sd->sd_ino); + printf(" uid: %d\tgid: %d\n", sd->sd_uid, sd->sd_gid); + printf(" size: %d\tflags: %x\n", sd->sd_size, ce->ce_flags); } } @@ -119,15 +119,19 @@ struct cache_time { unsigned int nsec; }; +struct stat_data { + struct cache_time sd_ctime; + struct cache_time sd_mtime; + unsigned int sd_dev; + unsigned int sd_ino; + unsigned int sd_uid; + unsigned int sd_gid; + unsigned int sd_size; +}; + struct cache_entry { - struct cache_time ce_ctime; - struct cache_time ce_mtime; - unsigned int ce_dev; - unsigned int ce_ino; + struct stat_data ce_stat_data; unsigned int ce_mode; - unsigned int ce_uid; - unsigned int ce_gid; - unsigned int ce_size; unsigned int ce_flags; unsigned int ce_namelen; unsigned char sha1[20]; @@ -511,6 +515,21 @@ extern int limit_pathspec_to_literal(void); #define HASH_FORMAT_CHECK 2 extern int index_fd(unsigned char *sha1, int fd, struct stat *st, enum object_type type, const char *path, unsigned flags); extern int index_path(unsigned char *sha1, const char *path, struct stat *st, unsigned flags); + +/* + * Record to sd the data from st that we use to check whether a file + * might have changed. + */ +extern void fill_stat_data(struct stat_data *sd, struct stat *st); + +/* + * Return 0 if st is consistent with a file not having been changed + * since sd was filled. If there are differences, return a + * combination of MTIME_CHANGED, CTIME_CHANGED, OWNER_CHANGED, + * INODE_CHANGED, and DATA_CHANGED. + */ +extern int match_stat_data(const struct stat_data *sd, struct stat *st); + extern void fill_stat_cache_info(struct cache_entry *ce, struct stat *st); #define REFRESH_REALLY 0x0001 /* ignore_valid */ diff --git a/read-cache.c b/read-cache.c index 5e30746886..5660b37bb2 100644 --- a/read-cache.c +++ b/read-cache.c @@ -67,6 +67,61 @@ void rename_index_entry_at(struct index_state *istate, int nr, const char *new_n add_index_entry(istate, new, ADD_CACHE_OK_TO_ADD|ADD_CACHE_OK_TO_REPLACE); } +void fill_stat_data(struct stat_data *sd, struct stat *st) +{ + sd->sd_ctime.sec = (unsigned int)st->st_ctime; + sd->sd_mtime.sec = (unsigned int)st->st_mtime; + sd->sd_ctime.nsec = ST_CTIME_NSEC(*st); + sd->sd_mtime.nsec = ST_MTIME_NSEC(*st); + sd->sd_dev = st->st_dev; + sd->sd_ino = st->st_ino; + sd->sd_uid = st->st_uid; + sd->sd_gid = st->st_gid; + sd->sd_size = st->st_size; +} + +int match_stat_data(const struct stat_data *sd, struct stat *st) +{ + int changed = 0; + + if (sd->sd_mtime.sec != (unsigned int)st->st_mtime) + changed |= MTIME_CHANGED; + if (trust_ctime && check_stat && + sd->sd_ctime.sec != (unsigned int)st->st_ctime) + changed |= CTIME_CHANGED; + +#ifdef USE_NSEC + if (check_stat && sd->sd_mtime.nsec != ST_MTIME_NSEC(*st)) + changed |= MTIME_CHANGED; + if (trust_ctime && check_stat && + sd->sd_ctime.nsec != ST_CTIME_NSEC(*st)) + changed |= CTIME_CHANGED; +#endif + + if (check_stat) { + if (sd->sd_uid != (unsigned int) st->st_uid || + sd->sd_gid != (unsigned int) st->st_gid) + changed |= OWNER_CHANGED; + if (sd->sd_ino != (unsigned int) st->st_ino) + changed |= INODE_CHANGED; + } + +#ifdef USE_STDEV + /* + * st_dev breaks on network filesystems where different + * clients will have different views of what "device" + * the filesystem is on + */ + if (check_stat && sd->sd_dev != (unsigned int) st->st_dev) + changed |= INODE_CHANGED; +#endif + + if (sd->sd_size != (unsigned int) st->st_size) + changed |= DATA_CHANGED; + + return changed; +} + /* * This only updates the "non-critical" parts of the directory * cache, ie the parts that aren't tracked by GIT, and only used @@ -74,15 +129,7 @@ void rename_index_entry_at(struct index_state *istate, int nr, const char *new_n */ void fill_stat_cache_info(struct cache_entry *ce, struct stat *st) { - ce->ce_ctime.sec = (unsigned int)st->st_ctime; - ce->ce_mtime.sec = (unsigned int)st->st_mtime; - ce->ce_ctime.nsec = ST_CTIME_NSEC(*st); - ce->ce_mtime.nsec = ST_MTIME_NSEC(*st); - ce->ce_dev = st->st_dev; - ce->ce_ino = st->st_ino; - ce->ce_uid = st->st_uid; - ce->ce_gid = st->st_gid; - ce->ce_size = st->st_size; + fill_stat_data(&ce->ce_stat_data, st); if (assume_unchanged) ce->ce_flags |= CE_VALID; @@ -195,43 +242,11 @@ static int ce_match_stat_basic(const struct cache_entry *ce, struct stat *st) default: die("internal error: ce_mode is %o", ce->ce_mode); } - if (ce->ce_mtime.sec != (unsigned int)st->st_mtime) - changed |= MTIME_CHANGED; - if (trust_ctime && check_stat && - ce->ce_ctime.sec != (unsigned int)st->st_ctime) - changed |= CTIME_CHANGED; -#ifdef USE_NSEC - if (check_stat && ce->ce_mtime.nsec != ST_MTIME_NSEC(*st)) - changed |= MTIME_CHANGED; - if (trust_ctime && check_stat && - ce->ce_ctime.nsec != ST_CTIME_NSEC(*st)) - changed |= CTIME_CHANGED; -#endif - - if (check_stat) { - if (ce->ce_uid != (unsigned int) st->st_uid || - ce->ce_gid != (unsigned int) st->st_gid) - changed |= OWNER_CHANGED; - if (ce->ce_ino != (unsigned int) st->st_ino) - changed |= INODE_CHANGED; - } - -#ifdef USE_STDEV - /* - * st_dev breaks on network filesystems where different - * clients will have different views of what "device" - * the filesystem is on - */ - if (check_stat && ce->ce_dev != (unsigned int) st->st_dev) - changed |= INODE_CHANGED; -#endif - - if (ce->ce_size != (unsigned int) st->st_size) - changed |= DATA_CHANGED; + changed |= match_stat_data(&ce->ce_stat_data, st); /* Racily smudged entry? */ - if (!ce->ce_size) { + if (!ce->ce_stat_data.sd_size) { if (!is_empty_blob_sha1(ce->sha1)) changed |= DATA_CHANGED; } @@ -246,11 +261,11 @@ static int is_racy_timestamp(const struct index_state *istate, istate->timestamp.sec && #ifdef USE_NSEC /* nanosecond timestamped files can also be racy! */ - (istate->timestamp.sec < ce->ce_mtime.sec || - (istate->timestamp.sec == ce->ce_mtime.sec && - istate->timestamp.nsec <= ce->ce_mtime.nsec)) + (istate->timestamp.sec < ce->ce_stat_data.sd_mtime.sec || + (istate->timestamp.sec == ce->ce_stat_data.sd_mtime.sec && + istate->timestamp.nsec <= ce->ce_stat_data.sd_mtime.nsec)) #else - istate->timestamp.sec <= ce->ce_mtime.sec + istate->timestamp.sec <= ce->ce_stat_data.sd_mtime.sec #endif ); } @@ -342,7 +357,7 @@ int ie_modified(const struct index_state *istate, * then we know it is. */ if ((changed & DATA_CHANGED) && - (S_ISGITLINK(ce->ce_mode) || ce->ce_size != 0)) + (S_ISGITLINK(ce->ce_mode) || ce->ce_stat_data.sd_size != 0)) return changed; changed_fs = ce_modified_check_fs(ce, st); @@ -1324,16 +1339,16 @@ static struct cache_entry *cache_entry_from_ondisk(struct ondisk_cache_entry *on { struct cache_entry *ce = xmalloc(cache_entry_size(len)); - ce->ce_ctime.sec = ntoh_l(ondisk->ctime.sec); - ce->ce_mtime.sec = ntoh_l(ondisk->mtime.sec); - ce->ce_ctime.nsec = ntoh_l(ondisk->ctime.nsec); - ce->ce_mtime.nsec = ntoh_l(ondisk->mtime.nsec); - ce->ce_dev = ntoh_l(ondisk->dev); - ce->ce_ino = ntoh_l(ondisk->ino); + ce->ce_stat_data.sd_ctime.sec = ntoh_l(ondisk->ctime.sec); + ce->ce_stat_data.sd_mtime.sec = ntoh_l(ondisk->mtime.sec); + ce->ce_stat_data.sd_ctime.nsec = ntoh_l(ondisk->ctime.nsec); + ce->ce_stat_data.sd_mtime.nsec = ntoh_l(ondisk->mtime.nsec); + ce->ce_stat_data.sd_dev = ntoh_l(ondisk->dev); + ce->ce_stat_data.sd_ino = ntoh_l(ondisk->ino); ce->ce_mode = ntoh_l(ondisk->mode); - ce->ce_uid = ntoh_l(ondisk->uid); - ce->ce_gid = ntoh_l(ondisk->gid); - ce->ce_size = ntoh_l(ondisk->size); + ce->ce_stat_data.sd_uid = ntoh_l(ondisk->uid); + ce->ce_stat_data.sd_gid = ntoh_l(ondisk->gid); + ce->ce_stat_data.sd_size = ntoh_l(ondisk->size); ce->ce_flags = flags & ~CE_NAMEMASK; ce->ce_namelen = len; hashcpy(ce->sha1, ondisk->sha1); @@ -1610,7 +1625,7 @@ static void ce_smudge_racily_clean_entry(struct cache_entry *ce) * The only thing we care about in this function is to smudge the * falsely clean entry due to touch-update-touch race, so we leave * everything else as they are. We are called for entries whose - * ce_mtime match the index file mtime. + * ce_stat_data.sd_mtime match the index file mtime. * * Note that this actually does not do much for gitlinks, for * which ce_match_stat_basic() always goes to the actual @@ -1649,7 +1664,7 @@ static void ce_smudge_racily_clean_entry(struct cache_entry *ce) * file, and never calls us, so the cached size information * for "frotz" stays 6 which does not match the filesystem. */ - ce->ce_size = 0; + ce->ce_stat_data.sd_size = 0; } } @@ -1659,16 +1674,16 @@ static char *copy_cache_entry_to_ondisk(struct ondisk_cache_entry *ondisk, { short flags; - ondisk->ctime.sec = htonl(ce->ce_ctime.sec); - ondisk->mtime.sec = htonl(ce->ce_mtime.sec); - ondisk->ctime.nsec = htonl(ce->ce_ctime.nsec); - ondisk->mtime.nsec = htonl(ce->ce_mtime.nsec); - ondisk->dev = htonl(ce->ce_dev); - ondisk->ino = htonl(ce->ce_ino); + ondisk->ctime.sec = htonl(ce->ce_stat_data.sd_ctime.sec); + ondisk->mtime.sec = htonl(ce->ce_stat_data.sd_mtime.sec); + ondisk->ctime.nsec = htonl(ce->ce_stat_data.sd_ctime.nsec); + ondisk->mtime.nsec = htonl(ce->ce_stat_data.sd_mtime.nsec); + ondisk->dev = htonl(ce->ce_stat_data.sd_dev); + ondisk->ino = htonl(ce->ce_stat_data.sd_ino); ondisk->mode = htonl(ce->ce_mode); - ondisk->uid = htonl(ce->ce_uid); - ondisk->gid = htonl(ce->ce_gid); - ondisk->size = htonl(ce->ce_size); + ondisk->uid = htonl(ce->ce_stat_data.sd_uid); + ondisk->gid = htonl(ce->ce_stat_data.sd_gid); + ondisk->size = htonl(ce->ce_stat_data.sd_size); hashcpy(ondisk->sha1, ce->sha1); flags = ce->ce_flags; |