/* * GPL HEADER START * * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 only, * as published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License version 2 for more details (a copy is included * in the LICENSE file that accompanied this code). * * You should have received a copy of the GNU General Public License * version 2 along with this program; If not, see * http://www.gnu.org/licenses/gpl-2.0.html * * GPL HEADER END */ /* * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved. * Use is subject to license terms. * * Copyright (c) 2011, 2016, Intel Corporation. */ /* * This file is part of Lustre, http://www.lustre.org/ * Lustre is a trademark of Sun Microsystems, Inc. */ #define DEBUG_SUBSYSTEM S_CLASS #include #include #include #include #include #include #include #include "osc_internal.h" #ifdef CONFIG_PROC_FS static int osc_active_seq_show(struct seq_file *m, void *v) { struct obd_device *dev = m->private; LPROCFS_CLIMP_CHECK(dev); seq_printf(m, "%d\n", !dev->u.cli.cl_import->imp_deactive); LPROCFS_CLIMP_EXIT(dev); return 0; } static ssize_t osc_active_seq_write(struct file *file, const char __user *buffer, size_t count, loff_t *off) { struct obd_device *dev = ((struct seq_file *)file->private_data)->private; int rc; __s64 val; rc = lprocfs_str_to_s64(buffer, count, &val); if (rc) return rc; if (val < 0 || val > 1) return -ERANGE; /* opposite senses */ if (dev->u.cli.cl_import->imp_deactive == val) rc = ptlrpc_set_import_active(dev->u.cli.cl_import, val); else CDEBUG(D_CONFIG, "activate %d: ignoring repeat request\n", (int)val); return count; } LPROC_SEQ_FOPS(osc_active); static int osc_max_rpcs_in_flight_seq_show(struct seq_file *m, void *v) { struct obd_device *dev = m->private; struct client_obd *cli = &dev->u.cli; spin_lock(&cli->cl_loi_list_lock); seq_printf(m, "%u\n", cli->cl_max_rpcs_in_flight); spin_unlock(&cli->cl_loi_list_lock); return 0; } static ssize_t osc_max_rpcs_in_flight_seq_write(struct file *file, const char __user *buffer, size_t count, loff_t *off) { struct obd_device *dev = ((struct seq_file *)file->private_data)->private; struct client_obd *cli = &dev->u.cli; int rc; int adding, added, req_count; __s64 val; rc = lprocfs_str_to_s64(buffer, count, &val); if (rc) return rc; if (val < 1 || val > OSC_MAX_RIF_MAX) return -ERANGE; LPROCFS_CLIMP_CHECK(dev); adding = (int)val - cli->cl_max_rpcs_in_flight; req_count = atomic_read(&osc_pool_req_count); if (adding > 0 && req_count < osc_reqpool_maxreqcount) { /* * There might be some race which will cause over-limit * allocation, but it is fine. */ if (req_count + adding > osc_reqpool_maxreqcount) adding = osc_reqpool_maxreqcount - req_count; added = osc_rq_pool->prp_populate(osc_rq_pool, adding); atomic_add(added, &osc_pool_req_count); } spin_lock(&cli->cl_loi_list_lock); cli->cl_max_rpcs_in_flight = val; client_adjust_max_dirty(cli); spin_unlock(&cli->cl_loi_list_lock); LPROCFS_CLIMP_EXIT(dev); return count; } LPROC_SEQ_FOPS(osc_max_rpcs_in_flight); static int osc_max_dirty_mb_seq_show(struct seq_file *m, void *v) { struct obd_device *dev = m->private; struct client_obd *cli = &dev->u.cli; long val; int mult; spin_lock(&cli->cl_loi_list_lock); val = cli->cl_dirty_max_pages; spin_unlock(&cli->cl_loi_list_lock); mult = 1 << (20 - PAGE_SHIFT); return lprocfs_seq_read_frac_helper(m, val, mult); } static ssize_t osc_max_dirty_mb_seq_write(struct file *file, const char __user *buffer, size_t count, loff_t *off) { struct obd_device *dev = ((struct seq_file *)file->private_data)->private; struct client_obd *cli = &dev->u.cli; int rc; __s64 pages_number; rc = lprocfs_str_with_units_to_s64(buffer, count, &pages_number, 'M'); if (rc) return rc; pages_number >>= PAGE_SHIFT; if (pages_number <= 0 || pages_number >= OSC_MAX_DIRTY_MB_MAX << (20 - PAGE_SHIFT) || pages_number > totalram_pages / 4) /* 1/4 of RAM */ return -ERANGE; spin_lock(&cli->cl_loi_list_lock); cli->cl_dirty_max_pages = pages_number; osc_wake_cache_waiters(cli); spin_unlock(&cli->cl_loi_list_lock); return count; } LPROC_SEQ_FOPS(osc_max_dirty_mb); static int osc_cached_mb_seq_show(struct seq_file *m, void *v) { struct obd_device *dev = m->private; struct client_obd *cli = &dev->u.cli; int shift = 20 - PAGE_SHIFT; seq_printf(m, "used_mb: %ld\n" "busy_cnt: %ld\n" "reclaim: %llu\n", (atomic_long_read(&cli->cl_lru_in_list) + atomic_long_read(&cli->cl_lru_busy)) >> shift, atomic_long_read(&cli->cl_lru_busy), cli->cl_lru_reclaim); return 0; } /* shrink the number of caching pages to a specific number */ static ssize_t osc_cached_mb_seq_write(struct file *file, const char __user *buffer, size_t count, loff_t *off) { struct obd_device *dev = ((struct seq_file *)file->private_data)->private; struct client_obd *cli = &dev->u.cli; __s64 pages_number; long rc; char kernbuf[128]; if (count >= sizeof(kernbuf)) return -EINVAL; if (copy_from_user(kernbuf, buffer, count)) return -EFAULT; kernbuf[count] = 0; buffer += lprocfs_find_named_value(kernbuf, "used_mb:", &count) - kernbuf; rc = lprocfs_str_with_units_to_s64(buffer, count, &pages_number, 'M'); if (rc) return rc; pages_number >>= PAGE_SHIFT; if (pages_number < 0) return -ERANGE; rc = atomic_long_read(&cli->cl_lru_in_list) - pages_number; if (rc > 0) { struct lu_env *env; __u16 refcheck; env = cl_env_get(&refcheck); if (!IS_ERR(env)) { (void)osc_lru_shrink(env, cli, rc, true); cl_env_put(env, &refcheck); } } return count; } LPROC_SEQ_FOPS(osc_cached_mb); static int osc_cur_dirty_bytes_seq_show(struct seq_file *m, void *v) { struct obd_device *dev = m->private; struct client_obd *cli = &dev->u.cli; spin_lock(&cli->cl_loi_list_lock); seq_printf(m, "%lu\n", cli->cl_dirty_pages << PAGE_SHIFT); spin_unlock(&cli->cl_loi_list_lock); return 0; } LPROC_SEQ_FOPS_RO(osc_cur_dirty_bytes); static int osc_cur_grant_bytes_seq_show(struct seq_file *m, void *v) { struct obd_device *dev = m->private; struct client_obd *cli = &dev->u.cli; spin_lock(&cli->cl_loi_list_lock); seq_printf(m, "%lu\n", cli->cl_avail_grant); spin_unlock(&cli->cl_loi_list_lock); return 0; } static ssize_t osc_cur_grant_bytes_seq_write(struct file *file, const char __user *buffer, size_t count, loff_t *off) { struct obd_device *obd = ((struct seq_file *)file->private_data)->private; struct client_obd *cli = &obd->u.cli; int rc; __s64 val; if (obd == NULL) return 0; rc = lprocfs_str_with_units_to_s64(buffer, count, &val, '1'); if (rc) return rc; if (val < 0) return -ERANGE; /* this is only for shrinking grant */ spin_lock(&cli->cl_loi_list_lock); if (val >= cli->cl_avail_grant) { spin_unlock(&cli->cl_loi_list_lock); return 0; } spin_unlock(&cli->cl_loi_list_lock); LPROCFS_CLIMP_CHECK(obd); if (cli->cl_import->imp_state == LUSTRE_IMP_FULL) rc = osc_shrink_grant_to_target(cli, val); LPROCFS_CLIMP_EXIT(obd); if (rc) return rc; return count; } LPROC_SEQ_FOPS(osc_cur_grant_bytes); static int osc_cur_lost_grant_bytes_seq_show(struct seq_file *m, void *v) { struct obd_device *dev = m->private; struct client_obd *cli = &dev->u.cli; spin_lock(&cli->cl_loi_list_lock); seq_printf(m, "%lu\n", cli->cl_lost_grant); spin_unlock(&cli->cl_loi_list_lock); return 0; } LPROC_SEQ_FOPS_RO(osc_cur_lost_grant_bytes); static int osc_cur_dirty_grant_bytes_seq_show(struct seq_file *m, void *v) { struct obd_device *dev = m->private; struct client_obd *cli = &dev->u.cli; spin_lock(&cli->cl_loi_list_lock); seq_printf(m, "%lu\n", cli->cl_dirty_grant); spin_unlock(&cli->cl_loi_list_lock); return 0; } LPROC_SEQ_FOPS_RO(osc_cur_dirty_grant_bytes); static int osc_grant_shrink_interval_seq_show(struct seq_file *m, void *v) { struct obd_device *obd = m->private; if (obd == NULL) return 0; seq_printf(m, "%d\n", obd->u.cli.cl_grant_shrink_interval); return 0; } static ssize_t osc_grant_shrink_interval_seq_write(struct file *file, const char __user *buffer, size_t count, loff_t *off) { struct obd_device *obd = ((struct seq_file *)file->private_data)->private; int rc; __s64 val; if (obd == NULL) return 0; rc = lprocfs_str_to_s64(buffer, count, &val); if (rc) return rc; if (val <= 0 || val > INT_MAX) return -ERANGE; obd->u.cli.cl_grant_shrink_interval = val; return count; } LPROC_SEQ_FOPS(osc_grant_shrink_interval); static int osc_checksum_seq_show(struct seq_file *m, void *v) { struct obd_device *obd = m->private; if (obd == NULL) return 0; seq_printf(m, "%d\n", obd->u.cli.cl_checksum ? 1 : 0); return 0; } static ssize_t osc_checksum_seq_write(struct file *file, const char __user *buffer, size_t count, loff_t *off) { struct obd_device *obd = ((struct seq_file *)file->private_data)->private; int rc; __s64 val; if (obd == NULL) return 0; rc = lprocfs_str_to_s64(buffer, count, &val); if (rc) return rc; obd->u.cli.cl_checksum = !!val; return count; } LPROC_SEQ_FOPS(osc_checksum); static int osc_checksum_type_seq_show(struct seq_file *m, void *v) { struct obd_device *obd = m->private; int i; DECLARE_CKSUM_NAME; if (obd == NULL) return 0; for (i = 0; i < ARRAY_SIZE(cksum_name); i++) { if (((1 << i) & obd->u.cli.cl_supp_cksum_types) == 0) continue; if (obd->u.cli.cl_cksum_type == (1 << i)) seq_printf(m, "[%s] ", cksum_name[i]); else seq_printf(m, "%s ", cksum_name[i]); } seq_printf(m, "\n"); return 0; } static ssize_t osc_checksum_type_seq_write(struct file *file, const char __user *buffer, size_t count, loff_t *off) { struct obd_device *obd = ((struct seq_file *)file->private_data)->private; int i; DECLARE_CKSUM_NAME; char kernbuf[10]; if (obd == NULL) return 0; if (count > sizeof(kernbuf) - 1) return -EINVAL; if (copy_from_user(kernbuf, buffer, count)) return -EFAULT; if (count > 0 && kernbuf[count - 1] == '\n') kernbuf[count - 1] = '\0'; else kernbuf[count] = '\0'; for (i = 0; i < ARRAY_SIZE(cksum_name); i++) { if (((1 << i) & obd->u.cli.cl_supp_cksum_types) == 0) continue; if (!strcmp(kernbuf, cksum_name[i])) { obd->u.cli.cl_cksum_type = 1 << i; return count; } } return -EINVAL; } LPROC_SEQ_FOPS(osc_checksum_type); static int osc_resend_count_seq_show(struct seq_file *m, void *v) { struct obd_device *obd = m->private; seq_printf(m, "%u\n", atomic_read(&obd->u.cli.cl_resends)); return 0; } static ssize_t osc_resend_count_seq_write(struct file *file, const char __user *buffer, size_t count, loff_t *off) { struct obd_device *obd = ((struct seq_file *)file->private_data)->private; int rc; __s64 val; rc = lprocfs_str_to_s64(buffer, count, &val); if (rc) return rc; if (val < 0 || val > INT_MAX) return -EINVAL; atomic_set(&obd->u.cli.cl_resends, val); return count; } LPROC_SEQ_FOPS(osc_resend_count); static int osc_checksum_dump_seq_show(struct seq_file *m, void *v) { struct obd_device *obd = m->private; if (obd == NULL) return 0; seq_printf(m, "%d\n", obd->u.cli.cl_checksum_dump ? 1 : 0); return 0; } static ssize_t osc_checksum_dump_seq_write(struct file *file, const char __user *buffer, size_t count, loff_t *off) { struct obd_device *obd; int rc; __s64 val; obd = ((struct seq_file *)file->private_data)->private; if (obd == NULL) return 0; rc = lprocfs_str_to_s64(buffer, count, &val); if (rc) return rc; obd->u.cli.cl_checksum_dump = (val ? 1 : 0); return count; } LPROC_SEQ_FOPS(osc_checksum_dump); static int osc_contention_seconds_seq_show(struct seq_file *m, void *v) { struct obd_device *obd = m->private; struct osc_device *od = obd2osc_dev(obd); seq_printf(m, "%u\n", od->od_contention_time); return 0; } static ssize_t osc_contention_seconds_seq_write(struct file *file, const char __user *buffer, size_t count, loff_t *off) { struct obd_device *obd = ((struct seq_file *)file->private_data)->private; struct osc_device *od = obd2osc_dev(obd); int rc; __s64 val; rc = lprocfs_str_to_s64(buffer, count, &val); if (rc) return rc; if (val < 0 || val > INT_MAX) return -ERANGE; od->od_contention_time = val; return count; } LPROC_SEQ_FOPS(osc_contention_seconds); static int osc_lockless_truncate_seq_show(struct seq_file *m, void *v) { struct obd_device *obd = m->private; struct osc_device *od = obd2osc_dev(obd); seq_printf(m, "%u\n", od->od_lockless_truncate); return 0; } static ssize_t osc_lockless_truncate_seq_write(struct file *file, const char __user *buffer, size_t count, loff_t *off) { struct obd_device *obd = ((struct seq_file *)file->private_data)->private; struct osc_device *od = obd2osc_dev(obd); int rc; __s64 val; rc = lprocfs_str_to_s64(buffer, count, &val); if (rc) return rc; if (val < 0) return -ERANGE; od->od_lockless_truncate = !!val; return count; } LPROC_SEQ_FOPS(osc_lockless_truncate); static int osc_destroys_in_flight_seq_show(struct seq_file *m, void *v) { struct obd_device *obd = m->private; seq_printf(m, "%u\n", atomic_read(&obd->u.cli.cl_destroy_in_flight)); return 0; } LPROC_SEQ_FOPS_RO(osc_destroys_in_flight); LPROC_SEQ_FOPS_RW_TYPE(osc, obd_max_pages_per_rpc); static int osc_unstable_stats_seq_show(struct seq_file *m, void *v) { struct obd_device *dev = m->private; struct client_obd *cli = &dev->u.cli; long pages; int mb; pages = atomic_long_read(&cli->cl_unstable_count); mb = (pages * PAGE_SIZE) >> 20; seq_printf(m, "unstable_pages: %20ld\n" "unstable_mb: %10d\n", pages, mb); return 0; } LPROC_SEQ_FOPS_RO(osc_unstable_stats); LPROC_SEQ_FOPS_RO_TYPE(osc, connect_flags); LPROC_SEQ_FOPS_RO_TYPE(osc, server_uuid); LPROC_SEQ_FOPS_RO_TYPE(osc, conn_uuid); LPROC_SEQ_FOPS_RO_TYPE(osc, timeouts); LPROC_SEQ_FOPS_RO_TYPE(osc, state); LPROC_SEQ_FOPS_WO_TYPE(osc, ping); LPROC_SEQ_FOPS_RW_TYPE(osc, import); LPROC_SEQ_FOPS_RW_TYPE(osc, pinger_recov); struct lprocfs_vars lprocfs_osc_obd_vars[] = { { .name = "ping", .fops = &osc_ping_fops, .proc_mode = 0222 }, { .name = "connect_flags", .fops = &osc_connect_flags_fops }, { .name = "ost_server_uuid", .fops = &osc_server_uuid_fops }, { .name = "ost_conn_uuid", .fops = &osc_conn_uuid_fops }, { .name = "active", .fops = &osc_active_fops }, { .name = "max_pages_per_rpc", .fops = &osc_obd_max_pages_per_rpc_fops }, { .name = "max_rpcs_in_flight", .fops = &osc_max_rpcs_in_flight_fops }, { .name = "destroys_in_flight", .fops = &osc_destroys_in_flight_fops }, { .name = "max_dirty_mb", .fops = &osc_max_dirty_mb_fops }, { .name = "osc_cached_mb", .fops = &osc_cached_mb_fops }, { .name = "cur_dirty_bytes", .fops = &osc_cur_dirty_bytes_fops }, { .name = "cur_grant_bytes", .fops = &osc_cur_grant_bytes_fops }, { .name = "cur_lost_grant_bytes", .fops = &osc_cur_lost_grant_bytes_fops }, { .name = "cur_dirty_grant_bytes", .fops = &osc_cur_dirty_grant_bytes_fops }, { .name = "grant_shrink_interval", .fops = &osc_grant_shrink_interval_fops }, { .name = "checksums", .fops = &osc_checksum_fops }, { .name = "checksum_type", .fops = &osc_checksum_type_fops }, { .name = "checksum_dump", .fops = &osc_checksum_dump_fops }, { .name = "resend_count", .fops = &osc_resend_count_fops }, { .name = "timeouts", .fops = &osc_timeouts_fops }, { .name = "contention_seconds", .fops = &osc_contention_seconds_fops }, { .name = "lockless_truncate", .fops = &osc_lockless_truncate_fops }, { .name = "import", .fops = &osc_import_fops }, { .name = "state", .fops = &osc_state_fops }, { .name = "pinger_recov", .fops = &osc_pinger_recov_fops }, { .name = "unstable_stats", .fops = &osc_unstable_stats_fops }, { NULL } }; #define pct(a,b) (b ? a * 100 / b : 0) static int osc_rpc_stats_seq_show(struct seq_file *seq, void *v) { struct timespec64 now; struct obd_device *dev = seq->private; struct client_obd *cli = &dev->u.cli; unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum; int i; ktime_get_real_ts64(&now); spin_lock(&cli->cl_loi_list_lock); seq_printf(seq, "snapshot_time: %lld.%09lu (secs.nsecs)\n", (s64)now.tv_sec, now.tv_nsec); seq_printf(seq, "read RPCs in flight: %d\n", cli->cl_r_in_flight); seq_printf(seq, "write RPCs in flight: %d\n", cli->cl_w_in_flight); seq_printf(seq, "pending write pages: %d\n", atomic_read(&cli->cl_pending_w_pages)); seq_printf(seq, "pending read pages: %d\n", atomic_read(&cli->cl_pending_r_pages)); seq_printf(seq, "\n\t\t\tread\t\t\twrite\n"); seq_printf(seq, "pages per rpc rpcs %% cum %% |"); seq_printf(seq, " rpcs %% cum %%\n"); read_tot = lprocfs_oh_sum(&cli->cl_read_page_hist); write_tot = lprocfs_oh_sum(&cli->cl_write_page_hist); read_cum = 0; write_cum = 0; for (i = 0; i < OBD_HIST_MAX; i++) { unsigned long r = cli->cl_read_page_hist.oh_buckets[i]; unsigned long w = cli->cl_write_page_hist.oh_buckets[i]; read_cum += r; write_cum += w; seq_printf(seq, "%d:\t\t%10lu %3lu %3lu | %10lu %3lu %3lu\n", 1 << i, r, pct(r, read_tot), pct(read_cum, read_tot), w, pct(w, write_tot), pct(write_cum, write_tot)); if (read_cum == read_tot && write_cum == write_tot) break; } seq_printf(seq, "\n\t\t\tread\t\t\twrite\n"); seq_printf(seq, "rpcs in flight rpcs %% cum %% |"); seq_printf(seq, " rpcs %% cum %%\n"); read_tot = lprocfs_oh_sum(&cli->cl_read_rpc_hist); write_tot = lprocfs_oh_sum(&cli->cl_write_rpc_hist); read_cum = 0; write_cum = 0; for (i = 0; i < OBD_HIST_MAX; i++) { unsigned long r = cli->cl_read_rpc_hist.oh_buckets[i]; unsigned long w = cli->cl_write_rpc_hist.oh_buckets[i]; read_cum += r; write_cum += w; seq_printf(seq, "%d:\t\t%10lu %3lu %3lu | %10lu %3lu %3lu\n", i, r, pct(r, read_tot), pct(read_cum, read_tot), w, pct(w, write_tot), pct(write_cum, write_tot)); if (read_cum == read_tot && write_cum == write_tot) break; } seq_printf(seq, "\n\t\t\tread\t\t\twrite\n"); seq_printf(seq, "offset rpcs %% cum %% |"); seq_printf(seq, " rpcs %% cum %%\n"); read_tot = lprocfs_oh_sum(&cli->cl_read_offset_hist); write_tot = lprocfs_oh_sum(&cli->cl_write_offset_hist); read_cum = 0; write_cum = 0; for (i = 0; i < OBD_HIST_MAX; i++) { unsigned long r = cli->cl_read_offset_hist.oh_buckets[i]; unsigned long w = cli->cl_write_offset_hist.oh_buckets[i]; read_cum += r; write_cum += w; seq_printf(seq, "%d:\t\t%10lu %3lu %3lu | %10lu %3lu %3lu\n", (i == 0) ? 0 : 1 << (i - 1), r, pct(r, read_tot), pct(read_cum, read_tot), w, pct(w, write_tot), pct(write_cum, write_tot)); if (read_cum == read_tot && write_cum == write_tot) break; } spin_unlock(&cli->cl_loi_list_lock); return 0; } #undef pct static ssize_t osc_rpc_stats_seq_write(struct file *file, const char __user *buf, size_t len, loff_t *off) { struct seq_file *seq = file->private_data; struct obd_device *dev = seq->private; struct client_obd *cli = &dev->u.cli; lprocfs_oh_clear(&cli->cl_read_rpc_hist); lprocfs_oh_clear(&cli->cl_write_rpc_hist); lprocfs_oh_clear(&cli->cl_read_page_hist); lprocfs_oh_clear(&cli->cl_write_page_hist); lprocfs_oh_clear(&cli->cl_read_offset_hist); lprocfs_oh_clear(&cli->cl_write_offset_hist); return len; } LPROC_SEQ_FOPS(osc_rpc_stats); static int osc_stats_seq_show(struct seq_file *seq, void *v) { struct timespec64 now; struct obd_device *dev = seq->private; struct osc_stats *stats = &obd2osc_dev(dev)->od_stats; ktime_get_real_ts64(&now); seq_printf(seq, "snapshot_time: %lld.%09lu (secs.nsecs)\n", (s64)now.tv_sec, now.tv_nsec); seq_printf(seq, "lockless_write_bytes\t\t%llu\n", stats->os_lockless_writes); seq_printf(seq, "lockless_read_bytes\t\t%llu\n", stats->os_lockless_reads); seq_printf(seq, "lockless_truncate\t\t%llu\n", stats->os_lockless_truncates); return 0; } static ssize_t osc_stats_seq_write(struct file *file, const char __user *buf, size_t len, loff_t *off) { struct seq_file *seq = file->private_data; struct obd_device *dev = seq->private; struct osc_stats *stats = &obd2osc_dev(dev)->od_stats; memset(stats, 0, sizeof(*stats)); return len; } LPROC_SEQ_FOPS(osc_stats); int lproc_osc_attach_seqstat(struct obd_device *dev) { int rc; rc = lprocfs_seq_create(dev->obd_proc_entry, "osc_stats", 0644, &osc_stats_fops, dev); if (rc == 0) rc = lprocfs_obd_seq_create(dev, "rpc_stats", 0644, &osc_rpc_stats_fops, dev); return rc; } #endif /* CONFIG_PROC_FS */