diff options
Diffstat (limited to 'packfile.c')
| -rw-r--r-- | packfile.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/packfile.c b/packfile.c index d91016f1c7..933036e260 100644 --- a/packfile.c +++ b/packfile.c @@ -737,6 +737,17 @@ struct packed_git *add_packed_git(struct repository *r, const char *path, p = alloc_packed_git(r, alloc); memcpy(p->pack_name, path, path_len); + /* + * Note that we have to check auxiliary data structures before we check + * for the ".pack" file to exist to avoid races with a packfile that is + * in the process of being deleted. The ".pack" file is unlinked before + * its auxiliary data structures, so we know that we either get a + * consistent snapshot of all data structures or that we'll fail to + * stat(3p) the packfile itself and thus return `NULL`. + * + * As such, we cannot bail out before the access(3p) calls in case the + * packfile doesn't exist without doing two stat(3p) calls for it. + */ xsnprintf(p->pack_name + path_len, alloc - path_len, ".keep"); if (!access(p->pack_name, F_OK)) p->pack_keep = 1; |