From: Igor Munkin <imun@tarantool.org> To: HustonMmmavr <huston.mavr@gmail.com> Cc: tarantool-patches@dev.tarantool.org Subject: Re: [Tarantool-patches] [PATCH v2] fio: fix race condition in mktree Date: Mon, 13 Jan 2020 15:28:54 +0300 [thread overview] Message-ID: <20200113122854.GH31304@tarantool.org> (raw) In-Reply-To: <20200113121449.36540-1-huston.mavr@gmail.com> Hello, Thanks, LGTM. Cced Sasha Tu. to proceed with the patch. On 13.01.20, HustonMmmavr wrote: > Despite the lack of documentation, fio.mktree() was designed to work > similar to mkdir -p: it creates the directory along with it's parents > and doesn't complain about existing ones. > > But this function was subject to a race if two different processes were > trying to create the same directory at the same time. It was caused by > the fact that directory existence check and its creation aren't atomic. > > This patch fixes the race by impoving error handling: it's not an error > if directory exists, even if it was created by someone else and mktree > failed. > > Related to https://github.com/tarantool/doc/issues/1063 Side note: you can mention the ticket from other repo queue the following way: | Relates to tarantool/doc#1063 > Closes #4660 > --- > branch: https://github.com/tarantool/tarantool/tree/HustonMmmavr/gh-4660-fix-fio-mktree-race > > src/lua/fio.lua | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/src/lua/fio.lua b/src/lua/fio.lua > index cb224f3d0..c9aeac951 100644 > --- a/src/lua/fio.lua > +++ b/src/lua/fio.lua > @@ -364,7 +364,7 @@ fio.mktree = function(path, mode) > local stat = fio.stat(current_dir) > if stat == nil then > local st, err = fio.mkdir(current_dir, mode) > - if err ~= nil then > + if err ~= nil and not fio.path.is_dir(current_dir) then > return false, string.format("Error creating directory %s: %s", > current_dir, tostring(err)) > end > -- > 2.23.0 > -- Best regards, IM
next prev parent reply other threads:[~2020-01-13 12:31 UTC|newest] Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-01-13 12:14 HustonMmmavr 2020-01-13 12:28 ` Igor Munkin [this message] 2020-01-13 15:44 ` Alexander Turenko
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