diff options
| author | Trond Myklebust <trond.myklebust@hammerspace.com> | 2023-09-09 12:23:01 -0400 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@hammerspace.com> | 2023-10-22 19:47:56 -0400 |
| commit | 5b9d31ae1c925bb5f15975e31b31ff5ae3c81f8f (patch) | |
| tree | 2e21f19f67d0a968df1adfac76a405383c77dd96 /fs/nfs/super.c | |
| parent | 05d3ef8bba77c1b5f98d941d8b2d4aeab8118ef1 (diff) | |
NFSv4: Add a parameter to limit the number of retries after NFS4ERR_DELAY
When using a 'softerr' mount, the NFSv4 client can get stuck waiting
forever while the server just returns NFS4ERR_DELAY. Among other things,
this causes the knfsd server threads to busy wait.
Add a parameter that tells the NFSv4 client how many times to retry
before giving up.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Diffstat (limited to 'fs/nfs/super.c')
| -rw-r--r-- | fs/nfs/super.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/fs/nfs/super.c b/fs/nfs/super.c index 0d6473cb00cb..bd00cfab73d1 100644 --- a/fs/nfs/super.c +++ b/fs/nfs/super.c @@ -1366,6 +1366,7 @@ unsigned short max_session_cb_slots = NFS4_DEF_CB_SLOT_TABLE_SIZE; unsigned short send_implementation_id = 1; char nfs4_client_id_uniquifier[NFS4_CLIENT_ID_UNIQ_LEN] = ""; bool recover_lost_locks = false; +short nfs_delay_retrans = -1; EXPORT_SYMBOL_GPL(nfs_callback_nr_threads); EXPORT_SYMBOL_GPL(nfs_callback_set_tcpport); @@ -1376,6 +1377,7 @@ EXPORT_SYMBOL_GPL(max_session_cb_slots); EXPORT_SYMBOL_GPL(send_implementation_id); EXPORT_SYMBOL_GPL(nfs4_client_id_uniquifier); EXPORT_SYMBOL_GPL(recover_lost_locks); +EXPORT_SYMBOL_GPL(nfs_delay_retrans); #define NFS_CALLBACK_MAXPORTNR (65535U) @@ -1424,5 +1426,9 @@ MODULE_PARM_DESC(recover_lost_locks, "If the server reports that a lock might be lost, " "try to recover it risking data corruption."); - +module_param_named(delay_retrans, nfs_delay_retrans, short, 0644); +MODULE_PARM_DESC(delay_retrans, + "Unless negative, specifies the number of times the NFSv4 " + "client retries a request before returning an EAGAIN error, " + "after a reply of NFS4ERR_DELAY from the server."); #endif /* CONFIG_NFS_V4 */ |