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[4/4] NFSv4: Treat ENETUNREACH errors as fatal for state recovery

Message ID 4855d263e403a8b56738f2f630954348718d7cc5.1742863168.git.trond.myklebust@hammerspace.com (mailing list archive)
State New
Headers show
Series Ensure that ENETUNREACH terminates state recovery | expand

Commit Message

Trond Myklebust March 25, 2025, 12:46 a.m. UTC
From: Trond Myklebust <trond.myklebust@hammerspace.com>

If a containerised process is killed and causes an ENETUNREACH or
ENETDOWN error to be propagated to the state manager, then mark the
nfs_client as being dead so that we don't loop in functions that are
expecting recovery to succeed.

Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
---
 fs/nfs/nfs4state.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

Comments

Trond Myklebust March 25, 2025, 11:36 a.m. UTC | #1
On Mon, 2025-03-24 at 20:46 -0400, trondmy@kernel.org wrote:
> From: Trond Myklebust <trond.myklebust@hammerspace.com>
> 
> If a containerised process is killed and causes an ENETUNREACH or
> ENETDOWN error to be propagated to the state manager, then mark the
> nfs_client as being dead so that we don't loop in functions that are
> expecting recovery to succeed.
> 
> Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
> ---
>  fs/nfs/nfs4state.c | 10 +++++++++-
>  1 file changed, 9 insertions(+), 1 deletion(-)
> 
> diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
> index 738eb2789266..629578dd4a42 100644
> --- a/fs/nfs/nfs4state.c
> +++ b/fs/nfs/nfs4state.c
> @@ -2739,7 +2739,15 @@ static void nfs4_state_manager(struct
> nfs_client *clp)
>  	pr_warn_ratelimited("NFS: state manager%s%s failed on NFSv4
> server %s"
>  			" with error %d\n", section_sep, section,
>  			clp->cl_hostname, -status);
> -	ssleep(1);
> +	switch (status) {
> +	case -ENETDOWN:
> +	case -ENETUNREACH:
> +		nfs_mark_client_ready(clp, status);

Actually, that probably needs to be nfs_mark_client_ready(clp, -EIO) in
order to make the return value a fatal I/O error.

> +		break;
> +	default:
> +		ssleep(1);
> +		break;
> +	}
>  out_drain:
>  	memalloc_nofs_restore(memflags);
>  	nfs4_end_drain_session(clp);
diff mbox series

Patch

diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index 738eb2789266..629578dd4a42 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -2739,7 +2739,15 @@  static void nfs4_state_manager(struct nfs_client *clp)
 	pr_warn_ratelimited("NFS: state manager%s%s failed on NFSv4 server %s"
 			" with error %d\n", section_sep, section,
 			clp->cl_hostname, -status);
-	ssleep(1);
+	switch (status) {
+	case -ENETDOWN:
+	case -ENETUNREACH:
+		nfs_mark_client_ready(clp, status);
+		break;
+	default:
+		ssleep(1);
+		break;
+	}
 out_drain:
 	memalloc_nofs_restore(memflags);
 	nfs4_end_drain_session(clp);