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NFSv4.2: support EXCHGID4_FLAG_SUPP_FENCE_OPS 4.2 EXCHANGE_ID flag

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commit 8c39076c276be0b31982e44654e2c2357473258a upstream.

RFC 7862 introduced a new flag that either client or server is
allowed to set: EXCHGID4_FLAG_SUPP_FENCE_OPS.

Client needs to update its bitmask to allow for this flag value.

v2: changed minor version argument to unsigned int

Signed-off-by: Olga Kornievskaia <kolga@netapp.com>
CC: <stable@vger.kernel.org>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Olga Kornievskaia 2020-10-16 09:25:45 -04:00 committed by Greg Kroah-Hartman
parent ed596114fd
commit 3c040b9249
2 changed files with 9 additions and 3 deletions
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9
fs/nfs/nfs4proc.c
View File

@ -7600,9 +7600,11 @@ int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
* both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
* DS flags set.
*/
static int nfs4_check_cl_exchange_flags(u32 flags)
static int nfs4_check_cl_exchange_flags(u32 flags, u32 version)
{
if (flags & ~EXCHGID4_FLAG_MASK_R)
if (version >= 2 && (flags & ~EXCHGID4_2_FLAG_MASK_R))
goto out_inval;
else if (version < 2 && (flags & ~EXCHGID4_FLAG_MASK_R))
goto out_inval;
if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
(flags & EXCHGID4_FLAG_USE_NON_PNFS))
@ -7997,7 +7999,8 @@ static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
if (status != 0)
goto out;
status = nfs4_check_cl_exchange_flags(resp->flags);
status = nfs4_check_cl_exchange_flags(resp->flags,
clp->cl_mvops->minor_version);
if (status != 0)
goto out;

3
include/uapi/linux/nfs4.h
View File

@ -136,6 +136,8 @@
#define EXCHGID4_FLAG_UPD_CONFIRMED_REC_A 0x40000000
#define EXCHGID4_FLAG_CONFIRMED_R 0x80000000
#define EXCHGID4_FLAG_SUPP_FENCE_OPS 0x00000004
/*
* Since the validity of these bits depends on whether
* they're set in the argument or response, have separate
@ -143,6 +145,7 @@
*/
#define EXCHGID4_FLAG_MASK_A 0x40070103
#define EXCHGID4_FLAG_MASK_R 0x80070103
#define EXCHGID4_2_FLAG_MASK_R 0x80070107
#define SEQ4_STATUS_CB_PATH_DOWN 0x00000001
#define SEQ4_STATUS_CB_GSS_CONTEXTS_EXPIRING 0x00000002