From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: David Howells <dhowells@redhat.com>,
Marc Dionne <marc.dionne@auristor.com>,
Jonathan Billings <jsbillings@jsbillings.org>,
Sasha Levin <sashal@kernel.org>,
linux-afs@lists.infradead.org
Subject: [PATCH AUTOSEL 4.19 26/34] afs: Fix creation calls in the dynamic root to fail with EOPNOTSUPP
Date: Fri, 20 Dec 2019 09:34:25 -0500 [thread overview]
Message-ID: <20191220143433.9922-26-sashal@kernel.org> (raw)
In-Reply-To: <20191220143433.9922-1-sashal@kernel.org>
From: David Howells <dhowells@redhat.com>
[ Upstream commit 1da4bd9f9d187f53618890d7b66b9628bbec3c70 ]
Fix the lookup method on the dynamic root directory such that creation
calls, such as mkdir, open(O_CREAT), symlink, etc. fail with EOPNOTSUPP
rather than failing with some odd error (such as EEXIST).
lookup() itself tries to create automount directories when it is invoked.
These are cached locally in RAM and not committed to storage.
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Marc Dionne <marc.dionne@auristor.com>
Tested-by: Jonathan Billings <jsbillings@jsbillings.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
fs/afs/dynroot.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/fs/afs/dynroot.c b/fs/afs/dynroot.c
index f29c6dade7f62..069273a2483f9 100644
--- a/fs/afs/dynroot.c
+++ b/fs/afs/dynroot.c
@@ -145,6 +145,9 @@ static struct dentry *afs_dynroot_lookup(struct inode *dir, struct dentry *dentr
ASSERTCMP(d_inode(dentry), ==, NULL);
+ if (flags & LOOKUP_CREATE)
+ return ERR_PTR(-EOPNOTSUPP);
+
if (dentry->d_name.len >= AFSNAMEMAX) {
_leave(" = -ENAMETOOLONG");
return ERR_PTR(-ENAMETOOLONG);
--
2.20.1
next prev parent reply other threads:[~2019-12-20 14:35 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-20 14:34 [PATCH AUTOSEL 4.19 01/34] nvme_fc: add module to ops template to allow module references Sasha Levin
2019-12-20 14:34 ` [PATCH AUTOSEL 4.19 02/34] nvme-fc: fix double-free scenarios on hw queues Sasha Levin
2019-12-20 14:34 ` [PATCH AUTOSEL 4.19 03/34] drm/amdgpu: add check before enabling/disabling broadcast mode Sasha Levin
2019-12-20 14:34 ` [PATCH AUTOSEL 4.19 04/34] drm/amdgpu: add cache flush workaround to gfx8 emit_fence Sasha Levin
2019-12-20 14:34 ` [PATCH AUTOSEL 4.19 05/34] drm/amd/display: Fixed kernel panic when booting with DP-to-HDMI dongle Sasha Levin
2019-12-20 14:34 ` [PATCH AUTOSEL 4.19 06/34] iio: adc: max9611: Fix too short conversion time delay Sasha Levin
2019-12-20 14:34 ` [PATCH AUTOSEL 4.19 07/34] PM / devfreq: Fix devfreq_notifier_call returning errno Sasha Levin
2019-12-20 14:34 ` [PATCH AUTOSEL 4.19 08/34] PM / devfreq: Set scaling_max_freq to max on OPP notifier error Sasha Levin
2019-12-20 14:34 ` [PATCH AUTOSEL 4.19 09/34] PM / devfreq: Don't fail devfreq_dev_release if not in list Sasha Levin
2019-12-20 14:34 ` [PATCH AUTOSEL 4.19 10/34] afs: Fix afs_find_server lookups for ipv4 peers Sasha Levin
2019-12-20 14:34 ` [PATCH AUTOSEL 4.19 11/34] afs: Fix SELinux setting security label on /afs Sasha Levin
2019-12-20 14:34 ` [PATCH AUTOSEL 4.19 12/34] RDMA/cma: add missed unregister_pernet_subsys in init failure Sasha Levin
2019-12-20 14:34 ` [PATCH AUTOSEL 4.19 13/34] rxe: correctly calculate iCRC for unaligned payloads Sasha Levin
2019-12-20 14:34 ` [PATCH AUTOSEL 4.19 14/34] scsi: lpfc: Fix memory leak on lpfc_bsg_write_ebuf_set func Sasha Levin
2019-12-20 14:34 ` [PATCH AUTOSEL 4.19 15/34] scsi: qla2xxx: Drop superfluous INIT_WORK of del_work Sasha Levin
2019-12-20 14:34 ` [PATCH AUTOSEL 4.19 16/34] scsi: qla2xxx: Don't call qlt_async_event twice Sasha Levin
2019-12-20 14:34 ` [PATCH AUTOSEL 4.19 17/34] scsi: qla2xxx: Fix PLOGI payload and ELS IOCB dump length Sasha Levin
2019-12-20 14:34 ` [PATCH AUTOSEL 4.19 18/34] scsi: qla2xxx: Configure local loop for N2N target Sasha Levin
2019-12-20 14:34 ` [PATCH AUTOSEL 4.19 19/34] scsi: qla2xxx: Send Notify ACK after N2N PLOGI Sasha Levin
2019-12-20 14:34 ` [PATCH AUTOSEL 4.19 20/34] scsi: qla2xxx: Ignore PORT UPDATE " Sasha Levin
2019-12-20 14:34 ` [PATCH AUTOSEL 4.19 21/34] scsi: iscsi: qla4xxx: fix double free in probe Sasha Levin
2019-12-20 14:34 ` [PATCH AUTOSEL 4.19 22/34] scsi: libsas: stop discovering if oob mode is disconnected Sasha Levin
2019-12-20 14:34 ` [PATCH AUTOSEL 4.19 23/34] drm/nouveau: Move the declaration of struct nouveau_conn_atom up a bit Sasha Levin
2019-12-20 14:34 ` [PATCH AUTOSEL 4.19 24/34] usb: gadget: fix wrong endpoint desc Sasha Levin
2019-12-20 14:34 ` [PATCH AUTOSEL 4.19 25/34] net: make socket read/write_iter() honor IOCB_NOWAIT Sasha Levin
2019-12-20 14:34 ` Sasha Levin [this message]
2019-12-20 14:34 ` [PATCH AUTOSEL 4.19 27/34] md: raid1: check rdev before reference in raid1_sync_request func Sasha Levin
2019-12-20 14:34 ` [PATCH AUTOSEL 4.19 28/34] s390/cpum_sf: Adjust sampling interval to avoid hitting sample limits Sasha Levin
2019-12-20 14:34 ` [PATCH AUTOSEL 4.19 29/34] s390/cpum_sf: Avoid SBD overflow condition in irq handler Sasha Levin
2019-12-20 14:34 ` [PATCH AUTOSEL 4.19 30/34] IB/mlx4: Follow mirror sequence of device add during device removal Sasha Levin
2019-12-20 14:34 ` [PATCH AUTOSEL 4.19 31/34] IB/mlx5: Fix steering rule of drop and count Sasha Levin
2019-12-20 14:34 ` [PATCH AUTOSEL 4.19 32/34] xen-blkback: prevent premature module unload Sasha Levin
2019-12-20 14:34 ` [PATCH AUTOSEL 4.19 33/34] xen/balloon: fix ballooned page accounting without hotplug enabled Sasha Levin
2019-12-20 14:34 ` [PATCH AUTOSEL 4.19 34/34] PM / hibernate: memory_bm_find_bit(): Tighten node optimisation Sasha Levin
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