From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id E205954F90; Thu, 30 Nov 2023 16:26:49 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="XqxkBnZ9" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 6546BC433C8; Thu, 30 Nov 2023 16:26:49 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1701361609; bh=jPFWwwF8zYA3l8Wbfp0G5kxyiXBVCO9lXmjm8a7Mvks=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XqxkBnZ95TEbE4GK52UhhyrSAIjlksDdHCWZodDzj2sLSScccdTvSw+ydJ0Qe0Tuv hBO73TNFhxARUNpyw5GP1dk4OEY4Az+XKHUhzfIIyi7abt9VY7V+KWozKQcyeqgExw H3FeLADTQsJsrLeBaBNdwgTDHhYDv9Fla1yZ8bPo= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, "Paulo Alcantara (SUSE)" , Shyam Prasad N , Steve French , Sasha Levin Subject: [PATCH 6.6 090/112] cifs: account for primary channel in the interface list Date: Thu, 30 Nov 2023 16:22:17 +0000 Message-ID: <20231130162143.187691872@linuxfoundation.org> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20231130162140.298098091@linuxfoundation.org> References: <20231130162140.298098091@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 6.6-stable review patch. If anyone has any objections, please let me know. ------------------ From: Shyam Prasad N [ Upstream commit fa1d0508bdd4a68c5e40f85f635712af8c12f180 ] The refcounting of server interfaces should account for the primary channel too. Although this is not strictly necessary, doing so will account for the primary channel in DebugData. Cc: stable@vger.kernel.org Reviewed-by: Paulo Alcantara (SUSE) Signed-off-by: Shyam Prasad N Signed-off-by: Steve French Signed-off-by: Sasha Levin --- fs/smb/client/sess.c | 28 ++++++++++++++++++++++++++++ fs/smb/client/smb2ops.c | 6 ++++++ 2 files changed, 34 insertions(+) diff --git a/fs/smb/client/sess.c b/fs/smb/client/sess.c index 65545e65f1eb6..80050e36f0451 100644 --- a/fs/smb/client/sess.c +++ b/fs/smb/client/sess.c @@ -288,6 +288,7 @@ cifs_chan_update_iface(struct cifs_ses *ses, struct TCP_Server_Info *server) struct cifs_server_iface *iface = NULL; struct cifs_server_iface *old_iface = NULL; struct cifs_server_iface *last_iface = NULL; + struct sockaddr_storage ss; int rc = 0; spin_lock(&ses->chan_lock); @@ -306,6 +307,10 @@ cifs_chan_update_iface(struct cifs_ses *ses, struct TCP_Server_Info *server) } spin_unlock(&ses->chan_lock); + spin_lock(&server->srv_lock); + ss = server->dstaddr; + spin_unlock(&server->srv_lock); + spin_lock(&ses->iface_lock); if (!ses->iface_count) { spin_unlock(&ses->iface_lock); @@ -319,6 +324,16 @@ cifs_chan_update_iface(struct cifs_ses *ses, struct TCP_Server_Info *server) /* then look for a new one */ list_for_each_entry(iface, &ses->iface_list, iface_head) { + if (!chan_index) { + /* if we're trying to get the updated iface for primary channel */ + if (!cifs_match_ipaddr((struct sockaddr *) &ss, + (struct sockaddr *) &iface->sockaddr)) + continue; + + kref_get(&iface->refcount); + break; + } + /* do not mix rdma and non-rdma interfaces */ if (iface->rdma_capable != server->rdma) continue; @@ -345,6 +360,13 @@ cifs_chan_update_iface(struct cifs_ses *ses, struct TCP_Server_Info *server) cifs_dbg(FYI, "unable to find a suitable iface\n"); } + if (!chan_index && !iface) { + cifs_dbg(FYI, "unable to get the interface matching: %pIS\n", + &ss); + spin_unlock(&ses->iface_lock); + return 0; + } + /* now drop the ref to the current iface */ if (old_iface && iface) { cifs_dbg(FYI, "replacing iface: %pIS with %pIS\n", @@ -367,6 +389,12 @@ cifs_chan_update_iface(struct cifs_ses *ses, struct TCP_Server_Info *server) old_iface->weight_fulfilled--; kref_put(&old_iface->refcount, release_iface); + } else if (!chan_index) { + /* special case: update interface for primary channel */ + cifs_dbg(FYI, "referencing primary channel iface: %pIS\n", + &iface->sockaddr); + iface->num_channels++; + iface->weight_fulfilled++; } else { WARN_ON(!iface); cifs_dbg(FYI, "adding new iface: %pIS\n", &iface->sockaddr); diff --git a/fs/smb/client/smb2ops.c b/fs/smb/client/smb2ops.c index 4af0085239b74..0f8fa78cd47b1 100644 --- a/fs/smb/client/smb2ops.c +++ b/fs/smb/client/smb2ops.c @@ -756,6 +756,7 @@ SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon, bool in_ unsigned int ret_data_len = 0; struct network_interface_info_ioctl_rsp *out_buf = NULL; struct cifs_ses *ses = tcon->ses; + struct TCP_Server_Info *pserver; /* do not query too frequently */ if (ses->iface_last_update && @@ -780,6 +781,11 @@ SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon, bool in_ if (rc) goto out; + /* check if iface is still active */ + pserver = ses->chans[0].server; + if (pserver && !cifs_chan_is_iface_active(ses, pserver)) + cifs_chan_update_iface(ses, pserver); + out: kfree(out_buf); return rc; -- 2.42.0