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authorDerrick Stolee <dstolee@microsoft.com>2018-04-02 20:34:15 (GMT)
committerJunio C Hamano <gitster@pobox.com>2018-04-02 21:27:30 (GMT)
commitcfe83216e404223ce8c5f6ef79c4ba9a27ff872e (patch)
tree6f64a9ccff4777e87bd43fdf8e051a215048ae63
parentf2af9f5e02380ba3868df7daa34368945d500206 (diff)
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csum-file: refactor finalize_hashfile() method
If we want to use a hashfile on the temporary file for a lockfile, then we need finalize_hashfile() to fully write the trailing hash but also keep the file descriptor open. Do this by adding a new CSUM_HASH_IN_STREAM flag along with a functional change that checks this flag before writing the checksum to the stream. This differs from previous behavior since it would be written if either CSUM_CLOSE or CSUM_FSYNC is provided. Signed-off-by: Derrick Stolee <dstolee@microsoft.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
-rw-r--r--builtin/pack-objects.c4
-rw-r--r--bulk-checkin.c2
-rw-r--r--csum-file.c8
-rw-r--r--csum-file.h5
-rw-r--r--pack-bitmap-write.c2
-rw-r--r--pack-write.c5
6 files changed, 14 insertions, 12 deletions
diff --git a/builtin/pack-objects.c b/builtin/pack-objects.c
index 5126623..c4a5a95 100644
--- a/builtin/pack-objects.c
+++ b/builtin/pack-objects.c
@@ -837,9 +837,9 @@ static void write_pack_file(void)
* If so, rewrite it like in fast-import
*/
if (pack_to_stdout) {
- finalize_hashfile(f, oid.hash, CSUM_CLOSE);
+ finalize_hashfile(f, oid.hash, CSUM_HASH_IN_STREAM | CSUM_CLOSE);
} else if (nr_written == nr_remaining) {
- finalize_hashfile(f, oid.hash, CSUM_FSYNC);
+ finalize_hashfile(f, oid.hash, CSUM_HASH_IN_STREAM | CSUM_FSYNC | CSUM_CLOSE);
} else {
int fd = finalize_hashfile(f, oid.hash, 0);
fixup_pack_header_footer(fd, oid.hash, pack_tmp_name,
diff --git a/bulk-checkin.c b/bulk-checkin.c
index e8094f5..a3e1b59 100644
--- a/bulk-checkin.c
+++ b/bulk-checkin.c
@@ -35,7 +35,7 @@ static void finish_bulk_checkin(struct bulk_checkin_state *state)
unlink(state->pack_tmp_name);
goto clear_exit;
} else if (state->nr_written == 1) {
- finalize_hashfile(state->f, oid.hash, CSUM_FSYNC);
+ finalize_hashfile(state->f, oid.hash, CSUM_HASH_IN_STREAM | CSUM_FSYNC | CSUM_CLOSE);
} else {
int fd = finalize_hashfile(state->f, oid.hash, 0);
fixup_pack_header_footer(fd, oid.hash, state->pack_tmp_name,
diff --git a/csum-file.c b/csum-file.c
index e6c95a6..53ce37f 100644
--- a/csum-file.c
+++ b/csum-file.c
@@ -61,11 +61,11 @@ int finalize_hashfile(struct hashfile *f, unsigned char *result, unsigned int fl
the_hash_algo->final_fn(f->buffer, &f->ctx);
if (result)
hashcpy(result, f->buffer);
- if (flags & (CSUM_CLOSE | CSUM_FSYNC)) {
- /* write checksum and close fd */
+ if (flags & CSUM_HASH_IN_STREAM)
flush(f, f->buffer, the_hash_algo->rawsz);
- if (flags & CSUM_FSYNC)
- fsync_or_die(f->fd, f->name);
+ if (flags & CSUM_FSYNC)
+ fsync_or_die(f->fd, f->name);
+ if (flags & CSUM_CLOSE) {
if (close(f->fd))
die_errno("%s: sha1 file error on close", f->name);
fd = 0;
diff --git a/csum-file.h b/csum-file.h
index 9ba87f0..c5a2e33 100644
--- a/csum-file.h
+++ b/csum-file.h
@@ -27,8 +27,9 @@ extern void hashfile_checkpoint(struct hashfile *, struct hashfile_checkpoint *)
extern int hashfile_truncate(struct hashfile *, struct hashfile_checkpoint *);
/* finalize_hashfile flags */
-#define CSUM_CLOSE 1
-#define CSUM_FSYNC 2
+#define CSUM_CLOSE 1
+#define CSUM_FSYNC 2
+#define CSUM_HASH_IN_STREAM 4
extern struct hashfile *hashfd(int fd, const char *name);
extern struct hashfile *hashfd_check(const char *name);
diff --git a/pack-bitmap-write.c b/pack-bitmap-write.c
index 662b44f..db4c832 100644
--- a/pack-bitmap-write.c
+++ b/pack-bitmap-write.c
@@ -535,7 +535,7 @@ void bitmap_writer_finish(struct pack_idx_entry **index,
if (options & BITMAP_OPT_HASH_CACHE)
write_hash_cache(f, index, index_nr);
- finalize_hashfile(f, NULL, CSUM_FSYNC);
+ finalize_hashfile(f, NULL, CSUM_HASH_IN_STREAM | CSUM_FSYNC | CSUM_CLOSE);
if (adjust_shared_perm(tmp_file.buf))
die_errno("unable to make temporary bitmap file readable");
diff --git a/pack-write.c b/pack-write.c
index 044f427..a9d46bc 100644
--- a/pack-write.c
+++ b/pack-write.c
@@ -170,8 +170,9 @@ const char *write_idx_file(const char *index_name, struct pack_idx_entry **objec
}
hashwrite(f, sha1, the_hash_algo->rawsz);
- finalize_hashfile(f, NULL, ((opts->flags & WRITE_IDX_VERIFY)
- ? CSUM_CLOSE : CSUM_FSYNC));
+ finalize_hashfile(f, NULL, CSUM_HASH_IN_STREAM | CSUM_CLOSE |
+ ((opts->flags & WRITE_IDX_VERIFY)
+ ? 0 : CSUM_FSYNC));
return index_name;
}