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[PATCH v4 08/27] refs.c: change ref_transaction_update() to do error checking and return status

From
Ronnie Sahlberg <sahlberg@google.com>
Date
Apr 28, 2014, 22:54 UTC
Message-ID
<1398725682-30782-9-git-send-email-sahlberg@google.com>
In-Reply-To
<1398725682-30782-1-git-send-email-sahlberg@google.com>

Update ref_transaction_update() do some basic error checking and return true on error. Update all callers to check ref_transaction_update() for error.

Signed-off-by: Ronnie Sahlberg <sahlberg@google.com>
---
 builtin/update-ref.c | 10 ++++++----
 refs.c               |  9 +++++++--
 refs.h               | 10 +++++-----
 3 files changed, 18 insertions(+), 11 deletions(-)
diff --git a/builtin/update-ref.c b/builtin/update-ref.c
index 2bef2a0..59c4d6b 100644
--- a/builtin/update-ref.c
+++ b/builtin/update-ref.c
@@ -197,8 +197,9 @@ static const char *parse_cmd_update(struct strbuf *input, const char *next)
 	if (*next != line_termination)
 		die("update %s: extra input: %s", refname, next);
 
-	ref_transaction_update(transaction, refname, new_sha1, old_sha1,
-			       update_flags, have_old);
+	if (ref_transaction_update(transaction, refname, new_sha1, old_sha1,
+				   update_flags, have_old))
+		die("update %s: failed", refname);
 
 	update_flags = 0;
 	free(refname);
@@ -286,8 +287,9 @@ static const char *parse_cmd_verify(struct strbuf *input, const char *next)
 	if (*next != line_termination)
 		die("verify %s: extra input: %s", refname, next);
 
-	ref_transaction_update(transaction, refname, new_sha1, old_sha1,
-			       update_flags, have_old);
+	if (ref_transaction_update(transaction, refname, new_sha1, old_sha1,
+				   update_flags, have_old))
+		die("failed transaction update for %s", refname);
 
 	update_flags = 0;
 	free(refname);
diff --git a/refs.c b/refs.c
index 308e13e..1a903fb 100644
--- a/refs.c
+++ b/refs.c
@@ -3333,19 +3333,24 @@ static struct ref_update *add_update(struct ref_transaction *transaction,
 	return update;
 }
 
-void ref_transaction_update(struct ref_transaction *transaction,
+int ref_transaction_update(struct ref_transaction *transaction,
 			    const char *refname,
 			    const unsigned char *new_sha1,
 			    const unsigned char *old_sha1,
 			    int flags, int have_old)
 {
-	struct ref_update *update = add_update(transaction, refname);
+	struct ref_update *update;
+
+	if (have_old && !old_sha1)
+		die("have_old is true but old_sha1 is NULL");
 
+	update = add_update(transaction, refname);
 	hashcpy(update->new_sha1, new_sha1);
 	update->flags = flags;
 	update->have_old = have_old;
 	if (have_old)
 		hashcpy(update->old_sha1, old_sha1);
+	return 0;
 }
 
 void ref_transaction_create(struct ref_transaction *transaction,
diff --git a/refs.h b/refs.h
index bc7715e..0364a3e 100644
--- a/refs.h
+++ b/refs.h
@@ -237,11 +237,11 @@ void ref_transaction_rollback(struct ref_transaction *transaction);
  * that the reference should have had before the update, or zeros if
  * it must not have existed beforehand.
  */
-void ref_transaction_update(struct ref_transaction *transaction,
-			    const char *refname,
-			    const unsigned char *new_sha1,
-			    const unsigned char *old_sha1,
-			    int flags, int have_old);
+int ref_transaction_update(struct ref_transaction *transaction,
+			   const char *refname,
+			   const unsigned char *new_sha1,
+			   const unsigned char *old_sha1,
+			   int flags, int have_old);
 
 /*
  * Add a reference creation to transaction.  new_sha1 is the value

-- 
1.9.1.528.g98b8868.dirty
Previous: Ronnie SahlbergNext: Eric Sunshine
Message 9 of 38 in “Use ref transactions for all ref updates”
  1. 00/27 Use ref transactions for all ref updatesRonnie Sahlberg, Apr 28, 2014
  2. 01/27 refs.c: constify the sha arguments for ref_transaction_create|delete|updateRonnie Sahlberg, Apr 28, 2014
  3. 02/27 refs.c: allow passing NULL to ref_transaction_freeRonnie Sahlberg, Apr 28, 2014
  4. 03/27 refs.c: add a strbuf argument to ref_transaction_commit for error loggingRonnie Sahlberg, Apr 28, 2014
  5. 04/27 refs.c: make ref_update_reject_duplicates take a strbuf argument for errorsRonnie Sahlberg, Apr 28, 2014
  6. 05/27 update-ref.c: log transaction error from the update_refRonnie Sahlberg, Apr 28, 2014
  7. 06/27 refs.c: make update_ref_write update a strbuf on failureRonnie Sahlberg, Apr 28, 2014
  8. 07/27 refs.c: remove the onerr argument to ref_transaction_commitRonnie Sahlberg, Apr 28, 2014
  9. 08/27 refs.c: change ref_transaction_update() to do error checking and return statusRonnie Sahlberg, Apr 28, 2014
  10. Eric SunshineApr 29, 2014
  11. Ronnie SahlbergApr 29, 2014
  12. 09/27 refs.c: change ref_transaction_create to do error checking and return statusRonnie Sahlberg, Apr 28, 2014
  13. 10/27 refs.c: ref_transaction_delete to check for error and return statusRonnie Sahlberg, Apr 28, 2014
  14. 11/27 tag.c: use ref transactions when doing updatesRonnie Sahlberg, Apr 28, 2014
  15. 12/27 replace.c: use the ref transaction functions for updatesRonnie Sahlberg, Apr 28, 2014
  16. Eric SunshineApr 29, 2014
  17. Ronnie SahlbergApr 29, 2014
  18. Eric SunshineApr 29, 2014
  19. 13/27 commit.c: use ref transactions for updatesRonnie Sahlberg, Apr 28, 2014
  20. 14/27 sequencer.c: use ref transactions for all ref updatesRonnie Sahlberg, Apr 28, 2014
  21. 15/27 fast-import.c: change update_branch to use ref transactionsRonnie Sahlberg, Apr 28, 2014
  22. Eric SunshineApr 29, 2014
  23. Ronnie SahlbergApr 29, 2014
  24. Junio C HamanoApr 29, 2014
  25. 16/27 branch.c: use ref transaction for all ref updatesRonnie Sahlberg, Apr 28, 2014
  26. 17/27 refs.c: change update_ref to use a transactionRonnie Sahlberg, Apr 28, 2014
  27. 18/27 refs.c: free the transaction before returning when number of updates is 0Ronnie Sahlberg, Apr 28, 2014
  28. 19/27 refs.c: ref_transaction_commit should not free the transactionRonnie Sahlberg, Apr 28, 2014
  29. 20/27 fetch.c: clear errno before calling functions that might set itRonnie Sahlberg, Apr 28, 2014
  30. 21/27 fetch.c: change s_update_ref to use a ref transactionRonnie Sahlberg, Apr 28, 2014
  31. 22/27 fetch.c: use a single ref transaction for all ref updatesRonnie Sahlberg, Apr 28, 2014
  32. 23/27 receive-pack.c: use a reference transaction for updating the refsRonnie Sahlberg, Apr 28, 2014
  33. 24/27 fast-import.c: use a ref transaction when dumping tagsRonnie Sahlberg, Apr 28, 2014
  34. 25/27 walker.c: use ref transaction for ref updatesRonnie Sahlberg, Apr 28, 2014
  35. 26/27 refs.c: make write_ref_sha1 staticRonnie Sahlberg, Apr 28, 2014
  36. 27/27 refs.c: make lock_ref_sha1 staticRonnie Sahlberg, Apr 28, 2014
  37. Junio C HamanoApr 29, 2014
  38. Ronnie SahlbergApr 29, 2014

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