/* * 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.sun.com/software/products/lustre/docs/GPLv2.pdf * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * * GPL HEADER END */ /* * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved. * Use is subject to license terms. * * Copyright (c) 2011, 2014, 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 "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; int rc; LPROCFS_CLIMP_CHECK(dev); rc = seq_printf(m, "%d\n", !dev->u.cli.cl_import->imp_deactive); LPROCFS_CLIMP_EXIT(dev); return rc; } 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 val, rc; rc = lprocfs_write_helper(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", 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; int rc; spin_lock(&cli->cl_loi_list_lock); rc = seq_printf(m, "%u\n", cli->cl_max_rpcs_in_flight); spin_unlock(&cli->cl_loi_list_lock); return rc; } 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; struct ptlrpc_request_pool *pool = cli->cl_import->imp_rq_pool; int val, rc; rc = lprocfs_write_helper(buffer, count, &val); if (rc) return rc; if (val < 1 || val > OSC_MAX_RIF_MAX) return -ERANGE; LPROCFS_CLIMP_CHECK(dev); if (pool && val > cli->cl_max_rpcs_in_flight) pool->prp_populate(pool, val-cli->cl_max_rpcs_in_flight); 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_CACHE_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 pages_number, mult, rc; mult = 1 << (20 - PAGE_CACHE_SHIFT); rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult); if (rc) return rc; if (pages_number <= 0 || pages_number > OSC_MAX_DIRTY_MB_MAX << (20 - PAGE_CACHE_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_CACHE_SHIFT; int rc; rc = seq_printf(m, "used_mb: %ld\n" "busy_cnt: %ld\n", (atomic_long_read(&cli->cl_lru_in_list) + atomic_long_read(&cli->cl_lru_busy)) >> shift, atomic_long_read(&cli->cl_lru_busy)); return rc; } /* 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; __u64 val; long pages_number; long rc; int mult; char kernbuf[128]; if (count >= sizeof(kernbuf)) return -EINVAL; if (copy_from_user(kernbuf, buffer, count)) return -EFAULT; kernbuf[count] = 0; mult = 1 << (20 - PAGE_CACHE_SHIFT); buffer += lprocfs_find_named_value(kernbuf, "used_mb:", &count) - kernbuf; rc = lprocfs_write_frac_u64_helper(buffer, count, &val, mult); if (rc) return rc; if (val > LONG_MAX) return -ERANGE; pages_number = (long)val; if (pages_number < 0) return -ERANGE; rc = atomic_long_read(&cli->cl_lru_in_list) - pages_number; if (rc > 0) { struct lu_env *env; int 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; int rc; spin_lock(&cli->cl_loi_list_lock); rc = seq_printf(m, "%lu\n", cli->cl_dirty_pages << PAGE_CACHE_SHIFT); spin_unlock(&cli->cl_loi_list_lock); return rc; } 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; int rc; spin_lock(&cli->cl_loi_list_lock); rc = seq_printf(m, "%lu\n", cli->cl_avail_grant); spin_unlock(&cli->cl_loi_list_lock); return rc; } 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; __u64 val; if (obd == NULL) return 0; rc = lprocfs_write_u64_helper(buffer, count, &val); if (rc) return rc; /* 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; int rc; spin_lock(&cli->cl_loi_list_lock); rc = seq_printf(m, "%lu\n", cli->cl_lost_grant); spin_unlock(&cli->cl_loi_list_lock); return rc; } LPROC_SEQ_FOPS_RO(osc_cur_lost_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; return seq_printf(m, "%d\n", obd->u.cli.cl_grant_shrink_interval); } 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 val, rc; if (obd == NULL) return 0; rc = lprocfs_write_helper(buffer, count, &val); if (rc) return rc; if (val <= 0) 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; return seq_printf(m, "%d\n", obd->u.cli.cl_checksum ? 1 : 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 val, rc; if (obd == NULL) return 0; rc = lprocfs_write_helper(buffer, count, &val); if (rc) return rc; obd->u.cli.cl_checksum = (val ? 1 : 0); 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; return seq_printf(m, "%u\n", atomic_read(&obd->u.cli.cl_resends)); } 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 val, rc; rc = lprocfs_write_helper(buffer, count, &val); if (rc) return rc; if (val < 0) return -EINVAL; atomic_set(&obd->u.cli.cl_resends, val); return count; } LPROC_SEQ_FOPS(osc_resend_count); 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); return seq_printf(m, "%u\n", od->od_contention_time); } 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); return lprocfs_write_helper(buffer, count, &od->od_contention_time) ?: 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); return seq_printf(m, "%u\n", od->od_lockless_truncate); } 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); return lprocfs_write_helper(buffer, count, &od->od_lockless_truncate) ?: 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; return seq_printf(m, "%u\n", atomic_read(&obd->u.cli.cl_destroy_in_flight)); } LPROC_SEQ_FOPS_RO(osc_destroys_in_flight); static int osc_obd_max_pages_per_rpc_seq_show(struct seq_file *m, void *v) { return lprocfs_obd_max_pages_per_rpc_seq_show(m, m->private); } static ssize_t osc_obd_max_pages_per_rpc_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; struct obd_connect_data *ocd = &cli->cl_import->imp_connect_data; int chunk_mask, rc; __u64 val; rc = lprocfs_write_u64_helper(buffer, count, &val); if (rc) return rc; /* if the max_pages is specified in bytes, convert to pages */ if (val >= ONE_MB_BRW_SIZE) val >>= PAGE_CACHE_SHIFT; LPROCFS_CLIMP_CHECK(dev); chunk_mask = ~((1 << (cli->cl_chunkbits - PAGE_CACHE_SHIFT)) - 1); /* max_pages_per_rpc must be chunk aligned */ val = (val + ~chunk_mask) & chunk_mask; if (val == 0 || (ocd->ocd_brw_size != 0 && val > ocd->ocd_brw_size >> PAGE_CACHE_SHIFT)) { LPROCFS_CLIMP_EXIT(dev); return -ERANGE; } spin_lock(&cli->cl_loi_list_lock); cli->cl_max_pages_per_rpc = val; client_adjust_max_dirty(cli); spin_unlock(&cli->cl_loi_list_lock); LPROCFS_CLIMP_EXIT(dev); return count; } LPROC_SEQ_FOPS(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_CACHE_SIZE) >> 20; return seq_printf(m, "unstable_pages: %20ld\n" "unstable_mb: %10d\n", pages, mb); } LPROC_SEQ_FOPS_RO(osc_unstable_stats); LPROC_SEQ_FOPS_RO_TYPE(osc, uuid); LPROC_SEQ_FOPS_RO_TYPE(osc, connect_flags); LPROC_SEQ_FOPS_RO_TYPE(osc, blksize); LPROC_SEQ_FOPS_RO_TYPE(osc, kbytestotal); LPROC_SEQ_FOPS_RO_TYPE(osc, kbytesfree); LPROC_SEQ_FOPS_RO_TYPE(osc, kbytesavail); LPROC_SEQ_FOPS_RO_TYPE(osc, filestotal); LPROC_SEQ_FOPS_RO_TYPE(osc, filesfree); 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 = "uuid", .fops = &osc_uuid_fops }, { .name = "ping", .fops = &osc_ping_fops, .proc_mode = 0222 }, { .name = "connect_flags", .fops = &osc_connect_flags_fops }, { .name = "blocksize", .fops = &osc_blksize_fops }, { .name = "kbytestotal", .fops = &osc_kbytestotal_fops }, { .name = "kbytesfree", .fops = &osc_kbytesfree_fops }, { .name = "kbytesavail", .fops = &osc_kbytesavail_fops }, { .name = "filestotal", .fops = &osc_filestotal_fops }, { .name = "filesfree", .fops = &osc_filesfree_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 = "grant_shrink_interval", .fops = &osc_grant_shrink_interval_fops }, { .name = "checksums", .fops = &osc_checksum_fops }, { .name = "checksum_type", .fops = &osc_checksum_type_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 timeval 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; do_gettimeofday(&now); spin_lock(&cli->cl_loi_list_lock); seq_printf(seq, "snapshot_time: %lu.%lu (secs.usecs)\n", now.tv_sec, now.tv_usec); 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 timeval now; struct obd_device *dev = seq->private; struct osc_stats *stats = &obd2osc_dev(dev)->od_stats; do_gettimeofday(&now); seq_printf(seq, "snapshot_time: %lu.%lu (secs.usecs)\n", now.tv_sec, now.tv_usec); seq_printf(seq, "lockless_write_bytes\t\t"LPU64"\n", stats->os_lockless_writes); seq_printf(seq, "lockless_read_bytes\t\t"LPU64"\n", stats->os_lockless_reads); seq_printf(seq, "lockless_truncate\t\t"LPU64"\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 */