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-rw-r--r--read-cache.c257
1 files changed, 171 insertions, 86 deletions
diff --git a/read-cache.c b/read-cache.c
index fda78bc353..c3d5e3543f 100644
--- a/read-cache.c
+++ b/read-cache.c
@@ -46,7 +46,7 @@ static void replace_index_entry(struct index_state *istate, int nr, struct cache
{
struct cache_entry *old = istate->cache[nr];
- remove_name_hash(old);
+ remove_name_hash(istate, old);
set_index_entry(istate, nr, ce);
istate->cache_changed = 1;
}
@@ -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;
@@ -91,7 +138,7 @@ void fill_stat_cache_info(struct cache_entry *ce, struct stat *st)
ce_mark_uptodate(ce);
}
-static int ce_compare_data(struct cache_entry *ce, struct stat *st)
+static int ce_compare_data(const struct cache_entry *ce, struct stat *st)
{
int match = -1;
int fd = open(ce->name, O_RDONLY);
@@ -105,7 +152,7 @@ static int ce_compare_data(struct cache_entry *ce, struct stat *st)
return match;
}
-static int ce_compare_link(struct cache_entry *ce, size_t expected_size)
+static int ce_compare_link(const struct cache_entry *ce, size_t expected_size)
{
int match = -1;
void *buffer;
@@ -126,7 +173,7 @@ static int ce_compare_link(struct cache_entry *ce, size_t expected_size)
return match;
}
-static int ce_compare_gitlink(struct cache_entry *ce)
+static int ce_compare_gitlink(const struct cache_entry *ce)
{
unsigned char sha1[20];
@@ -143,7 +190,7 @@ static int ce_compare_gitlink(struct cache_entry *ce)
return hashcmp(sha1, ce->sha1);
}
-static int ce_modified_check_fs(struct cache_entry *ce, struct stat *st)
+static int ce_modified_check_fs(const struct cache_entry *ce, struct stat *st)
{
switch (st->st_mode & S_IFMT) {
case S_IFREG:
@@ -163,7 +210,7 @@ static int ce_modified_check_fs(struct cache_entry *ce, struct stat *st)
return 0;
}
-static int ce_match_stat_basic(struct cache_entry *ce, struct stat *st)
+static int ce_match_stat_basic(const struct cache_entry *ce, struct stat *st)
{
unsigned int changed = 0;
@@ -195,39 +242,11 @@ static int ce_match_stat_basic(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 && ce->ce_ctime.sec != (unsigned int)st->st_ctime)
- changed |= CTIME_CHANGED;
-#ifdef USE_NSEC
- if (ce->ce_mtime.nsec != ST_MTIME_NSEC(*st))
- changed |= MTIME_CHANGED;
- if (trust_ctime && ce->ce_ctime.nsec != ST_CTIME_NSEC(*st))
- changed |= CTIME_CHANGED;
-#endif
-
- 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 (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;
}
@@ -235,23 +254,24 @@ static int ce_match_stat_basic(struct cache_entry *ce, struct stat *st)
return changed;
}
-static int is_racy_timestamp(const struct index_state *istate, struct cache_entry *ce)
+static int is_racy_timestamp(const struct index_state *istate,
+ const struct cache_entry *ce)
{
return (!S_ISGITLINK(ce->ce_mode) &&
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
);
}
int ie_match_stat(const struct index_state *istate,
- struct cache_entry *ce, struct stat *st,
+ const struct cache_entry *ce, struct stat *st,
unsigned int options)
{
unsigned int changed;
@@ -307,7 +327,8 @@ int ie_match_stat(const struct index_state *istate,
}
int ie_modified(const struct index_state *istate,
- struct cache_entry *ce, struct stat *st, unsigned int options)
+ const struct cache_entry *ce,
+ struct stat *st, unsigned int options)
{
int changed, changed_fs;
@@ -336,7 +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);
@@ -456,7 +477,7 @@ int remove_index_entry_at(struct index_state *istate, int pos)
struct cache_entry *ce = istate->cache[pos];
record_resolve_undo(istate, ce);
- remove_name_hash(ce);
+ remove_name_hash(istate, ce);
istate->cache_changed = 1;
istate->cache_nr--;
if (pos >= istate->cache_nr)
@@ -468,7 +489,7 @@ int remove_index_entry_at(struct index_state *istate, int pos)
}
/*
- * Remove all cache ententries marked for removal, that is where
+ * Remove all cache entries marked for removal, that is where
* CE_REMOVE is set in ce_flags. This is much more effective than
* calling remove_index_entry_at() for each entry to be removed.
*/
@@ -479,7 +500,7 @@ void remove_marked_cache_entries(struct index_state *istate)
for (i = j = 0; i < istate->cache_nr; i++) {
if (ce_array[i]->ce_flags & CE_REMOVE)
- remove_name_hash(ce_array[i]);
+ remove_name_hash(istate, ce_array[i]);
else
ce_array[j++] = ce_array[i];
}
@@ -622,7 +643,7 @@ int add_to_index(struct index_state *istate, const char *path, struct stat *st,
if (*ptr == '/') {
struct cache_entry *foundce;
++ptr;
- foundce = index_name_exists(&the_index, ce->name, ptr - ce->name, ignore_case);
+ foundce = index_name_exists(istate, ce->name, ptr - ce->name, ignore_case);
if (foundce) {
memcpy((void *)startPtr, foundce->name + (startPtr - ce->name), ptr - startPtr);
startPtr = ptr;
@@ -701,7 +722,7 @@ struct cache_entry *make_cache_entry(unsigned int mode,
return ce;
}
-int ce_same_name(struct cache_entry *a, struct cache_entry *b)
+int ce_same_name(const struct cache_entry *a, const struct cache_entry *b)
{
int len = ce_namelen(a);
return ce_namelen(b) == len && !memcmp(a->name, b->name, len);
@@ -975,7 +996,7 @@ int add_index_entry(struct index_state *istate, struct cache_entry *ce, int opti
if (istate->cache_nr == istate->cache_alloc) {
istate->cache_alloc = alloc_nr(istate->cache_alloc);
istate->cache = xrealloc(istate->cache,
- istate->cache_alloc * sizeof(struct cache_entry *));
+ istate->cache_alloc * sizeof(*istate->cache));
}
/* Add it in.. */
@@ -1256,7 +1277,7 @@ static int verify_hdr(struct cache_header *hdr, unsigned long size)
if (hdr->hdr_signature != htonl(CACHE_SIGNATURE))
return error("bad signature");
hdr_version = ntohl(hdr->hdr_version);
- if (hdr_version < 2 || 4 < hdr_version)
+ if (hdr_version < INDEX_FORMAT_LB || INDEX_FORMAT_UB < hdr_version)
return error("bad index version %d", hdr_version);
git_SHA1_Init(&c);
git_SHA1_Update(&c, hdr, size - 20);
@@ -1318,16 +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);
@@ -1445,7 +1466,7 @@ int read_index_from(struct index_state *istate, const char *path)
istate->version = ntohl(hdr->hdr_version);
istate->cache_nr = ntohl(hdr->hdr_entries);
istate->cache_alloc = alloc_nr(istate->cache_nr);
- istate->cache = xcalloc(istate->cache_alloc, sizeof(struct cache_entry *));
+ istate->cache = xcalloc(istate->cache_alloc, sizeof(*istate->cache));
istate->initialized = 1;
if (istate->version == 4)
@@ -1511,12 +1532,12 @@ int discard_index(struct index_state *istate)
istate->cache_changed = 0;
istate->timestamp.sec = 0;
istate->timestamp.nsec = 0;
- istate->name_hash_initialized = 0;
- free_hash(&istate->name_hash);
+ free_name_hash(istate);
cache_tree_free(&(istate->cache_tree));
istate->initialized = 0;
-
- /* no need to throw away allocated active_cache */
+ free(istate->cache);
+ istate->cache = NULL;
+ istate->cache_alloc = 0;
return 0;
}
@@ -1605,7 +1626,7 @@ 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
@@ -1644,7 +1665,7 @@ 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;
}
}
@@ -1654,16 +1675,16 @@ 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;
@@ -1739,7 +1760,7 @@ static int has_racy_timestamp(struct index_state *istate)
}
/*
- * Opportunisticly update the index but do not complain if we can't
+ * Opportunistically update the index but do not complain if we can't
*/
void update_index_if_able(struct index_state *istate, struct lock_file *lockfile)
{
@@ -1896,3 +1917,67 @@ int index_name_is_other(const struct index_state *istate, const char *name,
}
return 1;
}
+
+void *read_blob_data_from_index(struct index_state *istate, const char *path, unsigned long *size)
+{
+ int pos, len;
+ unsigned long sz;
+ enum object_type type;
+ void *data;
+
+ len = strlen(path);
+ pos = index_name_pos(istate, path, len);
+ if (pos < 0) {
+ /*
+ * We might be in the middle of a merge, in which
+ * case we would read stage #2 (ours).
+ */
+ int i;
+ for (i = -pos - 1;
+ (pos < 0 && i < istate->cache_nr &&
+ !strcmp(istate->cache[i]->name, path));
+ i++)
+ if (ce_stage(istate->cache[i]) == 2)
+ pos = i;
+ }
+ if (pos < 0)
+ return NULL;
+ data = read_sha1_file(istate->cache[pos]->sha1, &type, &sz);
+ if (!data || type != OBJ_BLOB) {
+ free(data);
+ return NULL;
+ }
+ if (size)
+ *size = sz;
+ return data;
+}
+
+void stat_validity_clear(struct stat_validity *sv)
+{
+ free(sv->sd);
+ sv->sd = NULL;
+}
+
+int stat_validity_check(struct stat_validity *sv, const char *path)
+{
+ struct stat st;
+
+ if (stat(path, &st) < 0)
+ return sv->sd == NULL;
+ if (!sv->sd)
+ return 0;
+ return S_ISREG(st.st_mode) && !match_stat_data(sv->sd, &st);
+}
+
+void stat_validity_update(struct stat_validity *sv, int fd)
+{
+ struct stat st;
+
+ if (fstat(fd, &st) < 0 || !S_ISREG(st.st_mode))
+ stat_validity_clear(sv);
+ else {
+ if (!sv->sd)
+ sv->sd = xcalloc(1, sizeof(struct stat_data));
+ fill_stat_data(sv->sd, &st);
+ }
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-20 11:33:09 +0000