From: "Aurélien Aptel" <aaptel@suse.com>
To: Steve French <smfrench@gmail.com>, CIFS <linux-cifs@vger.kernel.org>
Cc: Pavel Shilovsky <piastryyy@gmail.com>
Subject: Re: [PATCH] smb3: fix unmount hang in open_shroot
Date: Fri, 13 Sep 2019 13:34:42 +0200 [thread overview]
Message-ID: <875zlwig4t.fsf@suse.com> (raw)
In-Reply-To: <CAH2r5mtpx88bvKPDZs24ipxH+pm_82ug_w2QPKpB+9Z0xjAYiA@mail.gmail.com>
"Steve French" <smfrench@gmail.com> writes:
> + /*
> + * We do not hold the lock for the open because in case
> + * SMB2_open needs to reconnect, it will end up calling
> + * cifs_mark_open_files_invalid() which takes the lock again
> + * thus causing a deadlock
> + */
> +
> + mutex_unlock(&tcon->crfid.fid_mutex);
> +
Good catch. Since the compounding changes it is SMB2_open_init() that is
triggering the reconnect -> mark_open_files_invalid() code path so it
looks good to me. Might be worth updating the comment to
s/SMB2_open/SMB2_open_init/ before you commit.
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
Cheers,
--
Aurélien Aptel / SUSE Labs Samba Team
GPG: 1839 CB5F 9F5B FB9B AA97 8C99 03C8 A49B 521B D5D3
SUSE Software Solutions Germany GmbH, Maxfeldstr. 5, 90409 Nürnberg, DE
GF: Felix Imendörffer, Mary Higgins, Sri Rasiah HRB 247165 (AG München)
next prev parent reply other threads:[~2019-09-13 11:34 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-09-12 23:10 [PATCH] smb3: fix unmount hang in open_shroot Steve French
2019-09-13 11:34 ` Aurélien Aptel [this message]
2019-09-13 14:36 ` Aurélien Aptel
2019-09-13 16:35 ` Pavel Shilovsky
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