From: Michael Haggerty <mhagger@alum.mit.edu>
To: Junio C Hamano <gitster@pobox.com>
Cc: git@vger.kernel.org, Jeff King <peff@peff.net>,
David Turner <novalis@novalis.org>,
Michael Haggerty <mhagger@alum.mit.edu>
Subject: [PATCH v3 08/23] rename_tmp_log(): use raceproof_create_file()
Date: Sat, 31 Dec 2016 04:12:48 +0100 [thread overview]
Message-ID: <75f51a671ed56bff55906c6f9400d53dfe8199c9.1483153436.git.mhagger@alum.mit.edu> (raw)
In-Reply-To: <cover.1483153436.git.mhagger@alum.mit.edu>
Besides shortening the code, this saves an unnecessary call to
safe_create_leading_directories_const() in almost all cases.
Signed-off-by: Michael Haggerty <mhagger@alum.mit.edu>
---
refs/files-backend.c | 73 +++++++++++++++++++++-------------------------------
1 file changed, 30 insertions(+), 43 deletions(-)
diff --git a/refs/files-backend.c b/refs/files-backend.c
index 74de289..3f18a01 100644
--- a/refs/files-backend.c
+++ b/refs/files-backend.c
@@ -2489,55 +2489,42 @@ static int files_delete_refs(struct ref_store *ref_store,
*/
#define TMP_RENAMED_LOG "logs/refs/.tmp-renamed-log"
-static int rename_tmp_log(const char *newrefname)
+static int rename_tmp_log_callback(const char *path, void *cb)
{
- int attempts_remaining = 4;
- struct strbuf path = STRBUF_INIT;
- int ret = -1;
+ int *true_errno = cb;
- retry:
- strbuf_reset(&path);
- strbuf_git_path(&path, "logs/%s", newrefname);
- switch (safe_create_leading_directories_const(path.buf)) {
- case SCLD_OK:
- break; /* success */
- case SCLD_VANISHED:
- if (--attempts_remaining > 0)
- goto retry;
- /* fall through */
- default:
- error("unable to create directory for %s", newrefname);
- goto out;
+ if (rename(git_path(TMP_RENAMED_LOG), path)) {
+ /*
+ * rename(a, b) when b is an existing directory ought
+ * to result in ISDIR, but Solaris 5.8 gives ENOTDIR.
+ * Sheesh. Record the true errno for error reporting,
+ * but report EISDIR to raceproof_create_file() so
+ * that it knows to retry.
+ */
+ *true_errno = errno;
+ if (errno == ENOTDIR)
+ errno = EISDIR;
+ return -1;
+ } else {
+ return 0;
}
+}
- if (rename(git_path(TMP_RENAMED_LOG), path.buf)) {
- if ((errno==EISDIR || errno==ENOTDIR) && --attempts_remaining > 0) {
- /*
- * rename(a, b) when b is an existing
- * directory ought to result in ISDIR, but
- * Solaris 5.8 gives ENOTDIR. Sheesh.
- */
- if (remove_empty_directories(&path)) {
- error("Directory not empty: logs/%s", newrefname);
- goto out;
- }
- goto retry;
- } else if (errno == ENOENT && --attempts_remaining > 0) {
- /*
- * Maybe another process just deleted one of
- * the directories in the path to newrefname.
- * Try again from the beginning.
- */
- goto retry;
- } else {
+static int rename_tmp_log(const char *newrefname)
+{
+ char *path = git_pathdup("logs/%s", newrefname);
+ int ret, true_errno;
+
+ ret = raceproof_create_file(path, rename_tmp_log_callback, &true_errno);
+ if (ret) {
+ if (errno == EISDIR)
+ error("Directory not empty: %s", path);
+ else
error("unable to move logfile "TMP_RENAMED_LOG" to logs/%s: %s",
- newrefname, strerror(errno));
- goto out;
- }
+ newrefname, strerror(true_errno));
}
- ret = 0;
-out:
- strbuf_release(&path);
+
+ free(path);
return ret;
}
--
2.9.3
next prev parent reply other threads:[~2016-12-31 3:14 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-12-31 3:12 [PATCH v3 00/23] Delete directories left empty after ref deletion Michael Haggerty
2016-12-31 3:12 ` [PATCH v3 01/23] files_rename_ref(): tidy up whitespace Michael Haggerty
2016-12-31 3:12 ` [PATCH v3 02/23] t5505: use "for-each-ref" to test for the non-existence of references Michael Haggerty
2016-12-31 3:12 ` [PATCH v3 03/23] safe_create_leading_directories_const(): preserve errno Michael Haggerty
2016-12-31 3:12 ` [PATCH v3 04/23] safe_create_leading_directories(): set errno on SCLD_EXISTS Michael Haggerty
2016-12-31 3:12 ` [PATCH v3 05/23] raceproof_create_file(): new function Michael Haggerty
2016-12-31 6:11 ` Jeff King
2016-12-31 7:42 ` Michael Haggerty
2017-01-01 2:07 ` Junio C Hamano
2016-12-31 3:12 ` [PATCH v3 06/23] lock_ref_sha1_basic(): inline constant Michael Haggerty
2016-12-31 3:12 ` [PATCH v3 07/23] lock_ref_sha1_basic(): use raceproof_create_file() Michael Haggerty
2016-12-31 3:12 ` Michael Haggerty [this message]
2016-12-31 3:12 ` [PATCH v3 09/23] rename_tmp_log(): improve error reporting Michael Haggerty
2016-12-31 3:12 ` [PATCH v3 10/23] log_ref_write(): inline function Michael Haggerty
2017-01-01 2:09 ` Junio C Hamano
2017-01-01 8:41 ` Michael Haggerty
2016-12-31 3:12 ` [PATCH v3 11/23] log_ref_setup(): separate code for create vs non-create Michael Haggerty
2016-12-31 6:26 ` Jeff King
2016-12-31 7:52 ` Michael Haggerty
2017-01-01 3:28 ` Junio C Hamano
2017-01-01 8:45 ` Michael Haggerty
2016-12-31 3:12 ` [PATCH v3 12/23] log_ref_setup(): improve robustness against races Michael Haggerty
2016-12-31 3:12 ` [PATCH v3 13/23] log_ref_setup(): pass the open file descriptor back to the caller Michael Haggerty
2016-12-31 6:32 ` Jeff King
2016-12-31 7:58 ` Michael Haggerty
2016-12-31 17:58 ` Jeff King
2017-01-01 10:36 ` Junio C Hamano
2016-12-31 3:12 ` [PATCH v3 14/23] log_ref_write_1(): don't depend on logfile argument Michael Haggerty
2016-12-31 6:35 ` Jeff King
2016-12-31 8:01 ` Michael Haggerty
2016-12-31 3:12 ` [PATCH v3 15/23] log_ref_setup(): manage the name of the reflog file internally Michael Haggerty
2016-12-31 3:12 ` [PATCH v3 16/23] log_ref_write_1(): inline function Michael Haggerty
2016-12-31 3:12 ` [PATCH v3 17/23] delete_ref_loose(): derive loose reference path from lock Michael Haggerty
2016-12-31 3:12 ` [PATCH v3 18/23] delete_ref_loose(): inline function Michael Haggerty
2016-12-31 3:12 ` [PATCH v3 19/23] try_remove_empty_parents(): rename parameter "name" -> "refname" Michael Haggerty
2016-12-31 3:13 ` [PATCH v3 20/23] try_remove_empty_parents(): don't trash argument contents Michael Haggerty
2016-12-31 6:40 ` Jeff King
2017-01-02 16:27 ` Michael Haggerty
2017-01-02 17:10 ` Jeff King
2016-12-31 3:13 ` [PATCH v3 21/23] try_remove_empty_parents(): don't accommodate consecutive slashes Michael Haggerty
2017-01-01 2:30 ` Junio C Hamano
2017-01-01 5:59 ` Jeff King
2017-01-02 18:06 ` Michael Haggerty
2017-01-02 18:26 ` Jeff King
2016-12-31 3:13 ` [PATCH v3 22/23] try_remove_empty_parents(): teach to remove parents of reflogs, too Michael Haggerty
2016-12-31 3:13 ` [PATCH v3 23/23] files_transaction_commit(): clean up empty directories Michael Haggerty
2016-12-31 6:47 ` [PATCH v3 00/23] Delete directories left empty after ref deletion Jeff King
2017-01-01 2:32 ` Junio C Hamano
2017-01-01 9:24 ` Jacob Keller
2017-01-01 9:26 ` Jacob Keller
2017-01-01 12:43 ` Philip Oakley
2017-01-01 20:36 ` Jacob Keller
2017-01-02 4:19 ` Jeff King
2017-01-02 18:14 ` Michael Haggerty
2017-01-02 18:54 ` Jacob Keller
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