From 506ada89629ec7059b96ecfb0dc7d33ece0103ca Mon Sep 17 00:00:00 2001 From: Eduard Zingerman Date: Fri, 4 Sep 2026 17:05:56 -0700 Subject: bpf: mark a NULL kfunc argument precise check_kfunc_arg() allows bpf_register_is_null() for nullable arguments w/o marking the underlying scalar register precise. Hence a checkpoint created on such a path would prune against arbitrary scalar value. Fixes: 3bda08b63670 ("bpf: Allow NULL buffers in bpf_dynptr_slice(_rw)") Signed-off-by: Eduard Zingerman Link: https://lore.kernel.org/r/20260904-register-is-null-precise-fixes-v1-5-0f5a360ff15d@gmail.com Signed-off-by: Alexei Starovoitov --- fs/nfsd/stats.c | 86 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 86 insertions(+) create mode 100644 fs/nfsd/stats.c (limited to 'fs/nfsd/stats.c') diff --git a/fs/nfsd/stats.c b/fs/nfsd/stats.c new file mode 100644 index 000000000..f7eaf95e2 --- /dev/null +++ b/fs/nfsd/stats.c @@ -0,0 +1,86 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * procfs-based user access to knfsd statistics + * + * /proc/net/rpc/nfsd + * + * Format: + * rc + * Statistsics for the reply cache + * fh + * statistics for filehandle lookup + * io + * statistics for IO throughput + * th + * number of threads + * ra + * + * plus generic RPC stats (see net/sunrpc/stats.c) + * + * Copyright (C) 1995, 1996, 1997 Olaf Kirch + */ + +#include +#include +#include +#include + +#include "nfsd.h" + +static int nfsd_show(struct seq_file *seq, void *v) +{ + struct net *net = pde_data(file_inode(seq->file)); + struct nfsd_net *nn = net_generic(net, nfsd_net_id); + int i; + + seq_printf(seq, "rc %lld %lld %lld\nfh %lld 0 0 0 0\nio %lld %lld\n", + percpu_counter_sum_positive(&nn->counter[NFSD_STATS_RC_HITS]), + percpu_counter_sum_positive(&nn->counter[NFSD_STATS_RC_MISSES]), + percpu_counter_sum_positive(&nn->counter[NFSD_STATS_RC_NOCACHE]), + percpu_counter_sum_positive(&nn->counter[NFSD_STATS_FH_STALE]), + percpu_counter_sum_positive(&nn->counter[NFSD_STATS_IO_READ]), + percpu_counter_sum_positive(&nn->counter[NFSD_STATS_IO_WRITE])); + + /* thread usage: */ + seq_printf(seq, "th %u 0", atomic_read(&nfsd_th_cnt)); + + /* deprecated thread usage histogram stats */ + for (i = 0; i < 10; i++) + seq_puts(seq, " 0.000"); + + /* deprecated ra-cache stats */ + seq_puts(seq, "\nra 0 0 0 0 0 0 0 0 0 0 0 0\n"); + + /* show my rpc info */ + svc_seq_show(seq, &nn->nfsd_svcstats); + +#ifdef CONFIG_NFSD_V4 + /* Show count for individual nfsv4 operations */ + /* Writing operation numbers 0 1 2 also for maintaining uniformity */ + seq_printf(seq, "proc4ops %u", LAST_NFS4_OP + 1); + for (i = 0; i <= LAST_NFS4_OP; i++) { + seq_printf(seq, " %lld", + percpu_counter_sum_positive(&nn->counter[NFSD_STATS_NFS4_OP(i)])); + } + seq_printf(seq, "\nwdeleg_getattr %lld", + percpu_counter_sum_positive(&nn->counter[NFSD_STATS_WDELEG_GETATTR])); + + seq_putc(seq, '\n'); +#endif + + return 0; +} + +DEFINE_PROC_SHOW_ATTRIBUTE(nfsd); + +struct proc_dir_entry *nfsd_proc_stat_init(struct net *net) +{ + struct nfsd_net *nn = net_generic(net, nfsd_net_id); + + return svc_proc_register(net, &nn->nfsd_svcstats, &nfsd_proc_ops); +} + +void nfsd_proc_stat_shutdown(struct net *net) +{ + svc_proc_unregister(net, "nfsd"); +} -- cgit v1.3.1