diff options
| author | Jeff Layton <jlayton@kernel.org> | 2023-10-13 09:03:53 -0400 |
|---|---|---|
| committer | Chuck Lever <chuck.lever@oracle.com> | 2024-01-07 17:54:24 -0500 |
| commit | 74fd48739d0488e39ae18b0168720f449a06690c (patch) | |
| tree | f7618f1ddd1b978efd3e3a0f9fd64f6451c397a3 /fs/nfsd/nfsctl.c | |
| parent | 0dd3ee31125508cd67f7e7172247f05b7fd1753a (diff) | |
nfsd: new Kconfig option for legacy client tracking
We've had a number of attempts at different NFSv4 client tracking
methods over the years, but now nfsdcld has emerged as the clear winner
since the others (recoverydir and the usermodehelper upcall) are
problematic.
As a case in point, the recoverydir backend uses MD5 hashes to encode
long form clientid strings, which means that nfsd repeatedly gets dinged
on FIPS audits, since MD5 isn't considered secure. Its use of MD5 is not
cryptographically significant, so there is no danger there, but allowing
us to compile that out allows us to sidestep the issue entirely.
As a prelude to eventually removing support for these client tracking
methods, add a new Kconfig option that enables them. Mark it deprecated
and make it default to N.
Acked-by: NeilBrown <neilb@suse.de>
Signed-off-by: Jeff Layton <jlayton@kernel.org>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Diffstat (limited to 'fs/nfsd/nfsctl.c')
| -rw-r--r-- | fs/nfsd/nfsctl.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c index 87fed75808ff..6a3b385703cc 100644 --- a/fs/nfsd/nfsctl.c +++ b/fs/nfsd/nfsctl.c @@ -76,7 +76,9 @@ static ssize_t write_maxconn(struct file *file, char *buf, size_t size); #ifdef CONFIG_NFSD_V4 static ssize_t write_leasetime(struct file *file, char *buf, size_t size); static ssize_t write_gracetime(struct file *file, char *buf, size_t size); +#ifdef CONFIG_NFSD_LEGACY_CLIENT_TRACKING static ssize_t write_recoverydir(struct file *file, char *buf, size_t size); +#endif static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size); #endif @@ -93,7 +95,9 @@ static ssize_t (*const write_op[])(struct file *, char *, size_t) = { #ifdef CONFIG_NFSD_V4 [NFSD_Leasetime] = write_leasetime, [NFSD_Gracetime] = write_gracetime, +#ifdef CONFIG_NFSD_LEGACY_CLIENT_TRACKING [NFSD_RecoveryDir] = write_recoverydir, +#endif [NFSD_V4EndGrace] = write_v4_end_grace, #endif }; @@ -1021,6 +1025,7 @@ static ssize_t write_gracetime(struct file *file, char *buf, size_t size) return nfsd4_write_time(file, buf, size, &nn->nfsd4_grace, nn); } +#ifdef CONFIG_NFSD_LEGACY_CLIENT_TRACKING static ssize_t __write_recoverydir(struct file *file, char *buf, size_t size, struct nfsd_net *nn) { @@ -1081,6 +1086,7 @@ static ssize_t write_recoverydir(struct file *file, char *buf, size_t size) mutex_unlock(&nfsd_mutex); return rv; } +#endif /* * write_v4_end_grace - release grace period for nfsd's v4.x lock manager |