diff options
Diffstat (limited to 'drivers/staging/lustre/lustre/llite/lproc_llite.c')
| -rw-r--r-- | drivers/staging/lustre/lustre/llite/lproc_llite.c | 1370 |
1 files changed, 1370 insertions, 0 deletions
diff --git a/drivers/staging/lustre/lustre/llite/lproc_llite.c b/drivers/staging/lustre/lustre/llite/lproc_llite.c new file mode 100644 index 000000000000..6a82505c7933 --- /dev/null +++ b/drivers/staging/lustre/lustre/llite/lproc_llite.c @@ -0,0 +1,1370 @@ +/* + * 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, 2012, Intel Corporation. + */ +/* + * This file is part of Lustre, http://www.lustre.org/ + * Lustre is a trademark of Sun Microsystems, Inc. + */ +#define DEBUG_SUBSYSTEM S_LLITE + +#include <linux/version.h> +#include <lustre_lite.h> +#include <lprocfs_status.h> +#include <linux/seq_file.h> +#include <obd_support.h> + +#include "llite_internal.h" + +struct proc_dir_entry *proc_lustre_fs_root; + +#ifdef LPROCFS +/* /proc/lustre/llite mount point registration */ +extern struct file_operations vvp_dump_pgcache_file_ops; +struct file_operations ll_rw_extents_stats_fops; +struct file_operations ll_rw_extents_stats_pp_fops; +struct file_operations ll_rw_offset_stats_fops; + +static int ll_blksize_seq_show(struct seq_file *m, void *v) +{ + struct super_block *sb = (struct super_block *)m->private; + struct obd_statfs osfs; + int rc; + + LASSERT(sb != NULL); + rc = ll_statfs_internal(sb, &osfs, + cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS), + OBD_STATFS_NODELAY); + if (!rc) + rc = seq_printf(m, "%u\n", osfs.os_bsize); + + return rc; +} +LPROC_SEQ_FOPS_RO(ll_blksize); + +static int ll_kbytestotal_seq_show(struct seq_file *m, void *v) +{ + struct super_block *sb = (struct super_block *)m->private; + struct obd_statfs osfs; + int rc; + + LASSERT(sb != NULL); + rc = ll_statfs_internal(sb, &osfs, + cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS), + OBD_STATFS_NODELAY); + if (!rc) { + __u32 blk_size = osfs.os_bsize >> 10; + __u64 result = osfs.os_blocks; + + while (blk_size >>= 1) + result <<= 1; + + rc = seq_printf(m, LPU64"\n", result); + } + return rc; +} +LPROC_SEQ_FOPS_RO(ll_kbytestotal); + +static int ll_kbytesfree_seq_show(struct seq_file *m, void *v) +{ + struct super_block *sb = (struct super_block *)m->private; + struct obd_statfs osfs; + int rc; + + LASSERT(sb != NULL); + rc = ll_statfs_internal(sb, &osfs, + cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS), + OBD_STATFS_NODELAY); + if (!rc) { + __u32 blk_size = osfs.os_bsize >> 10; + __u64 result = osfs.os_bfree; + + while (blk_size >>= 1) + result <<= 1; + + rc = seq_printf(m, LPU64"\n", result); + } + return rc; +} +LPROC_SEQ_FOPS_RO(ll_kbytesfree); + +static int ll_kbytesavail_seq_show(struct seq_file *m, void *v) +{ + struct super_block *sb = (struct super_block *)m->private; + struct obd_statfs osfs; + int rc; + + LASSERT(sb != NULL); + rc = ll_statfs_internal(sb, &osfs, + cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS), + OBD_STATFS_NODELAY); + if (!rc) { + __u32 blk_size = osfs.os_bsize >> 10; + __u64 result = osfs.os_bavail; + + while (blk_size >>= 1) + result <<= 1; + + rc = seq_printf(m, LPU64"\n", result); + } + return rc; +} +LPROC_SEQ_FOPS_RO(ll_kbytesavail); + +static int ll_filestotal_seq_show(struct seq_file *m, void *v) +{ + struct super_block *sb = (struct super_block *)m->private; + struct obd_statfs osfs; + int rc; + + LASSERT(sb != NULL); + rc = ll_statfs_internal(sb, &osfs, + cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS), + OBD_STATFS_NODELAY); + if (!rc) + rc = seq_printf(m, LPU64"\n", osfs.os_files); + return rc; +} +LPROC_SEQ_FOPS_RO(ll_filestotal); + +static int ll_filesfree_seq_show(struct seq_file *m, void *v) +{ + struct super_block *sb = (struct super_block *)m->private; + struct obd_statfs osfs; + int rc; + + LASSERT(sb != NULL); + rc = ll_statfs_internal(sb, &osfs, + cfs_time_shift_64(-OBD_STATFS_CACHE_SECONDS), + OBD_STATFS_NODELAY); + if (!rc) + rc = seq_printf(m, LPU64"\n", osfs.os_ffree); + return rc; +} +LPROC_SEQ_FOPS_RO(ll_filesfree); + +static int ll_client_type_seq_show(struct seq_file *m, void *v) +{ + struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private); + int rc; + + LASSERT(sbi != NULL); + + if (sbi->ll_flags & LL_SBI_RMT_CLIENT) + rc = seq_printf(m, "remote client\n"); + else + rc = seq_printf(m, "local client\n"); + + return rc; +} +LPROC_SEQ_FOPS_RO(ll_client_type); + +static int ll_fstype_seq_show(struct seq_file *m, void *v) +{ + struct super_block *sb = (struct super_block *)m->private; + + LASSERT(sb != NULL); + return seq_printf(m, "%s\n", sb->s_type->name); +} +LPROC_SEQ_FOPS_RO(ll_fstype); + +static int ll_sb_uuid_seq_show(struct seq_file *m, void *v) +{ + struct super_block *sb = (struct super_block *)m->private; + + LASSERT(sb != NULL); + return seq_printf(m, "%s\n", ll_s2sbi(sb)->ll_sb_uuid.uuid); +} +LPROC_SEQ_FOPS_RO(ll_sb_uuid); + +static int ll_site_stats_seq_show(struct seq_file *m, void *v) +{ + struct super_block *sb = m->private; + + /* + * See description of statistical counters in struct cl_site, and + * struct lu_site. + */ + return cl_site_stats_print(lu2cl_site(ll_s2sbi(sb)->ll_site), m); +} +LPROC_SEQ_FOPS_RO(ll_site_stats); + +static int ll_max_readahead_mb_seq_show(struct seq_file *m, void *v) +{ + struct super_block *sb = m->private; + struct ll_sb_info *sbi = ll_s2sbi(sb); + long pages_number; + int mult; + + spin_lock(&sbi->ll_lock); + pages_number = sbi->ll_ra_info.ra_max_pages; + spin_unlock(&sbi->ll_lock); + + mult = 1 << (20 - PAGE_CACHE_SHIFT); + return lprocfs_seq_read_frac_helper(m, pages_number, mult); +} + +static ssize_t ll_max_readahead_mb_seq_write(struct file *file, const char *buffer, + size_t count, loff_t *off) +{ + struct super_block *sb = ((struct seq_file *)file->private_data)->private; + struct ll_sb_info *sbi = ll_s2sbi(sb); + int mult, rc, pages_number; + + 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 > num_physpages / 2) { + CERROR("can't set file readahead more than %lu MB\n", + num_physpages >> (20 - PAGE_CACHE_SHIFT + 1)); /*1/2 of RAM*/ + return -ERANGE; + } + + spin_lock(&sbi->ll_lock); + sbi->ll_ra_info.ra_max_pages = pages_number; + spin_unlock(&sbi->ll_lock); + + return count; +} +LPROC_SEQ_FOPS(ll_max_readahead_mb); + +static int ll_max_readahead_per_file_mb_seq_show(struct seq_file *m, void *v) +{ + struct super_block *sb = m->private; + struct ll_sb_info *sbi = ll_s2sbi(sb); + long pages_number; + int mult; + + spin_lock(&sbi->ll_lock); + pages_number = sbi->ll_ra_info.ra_max_pages_per_file; + spin_unlock(&sbi->ll_lock); + + mult = 1 << (20 - PAGE_CACHE_SHIFT); + return lprocfs_seq_read_frac_helper(m, pages_number, mult); +} + +static ssize_t ll_max_readahead_per_file_mb_seq_write(struct file *file, + const char *buffer, + size_t count, loff_t *off) +{ + struct super_block *sb = ((struct seq_file *)file->private_data)->private; + struct ll_sb_info *sbi = ll_s2sbi(sb); + int mult, rc, pages_number; + + 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 > sbi->ll_ra_info.ra_max_pages) { + CERROR("can't set file readahead more than" + "max_read_ahead_mb %lu MB\n", + sbi->ll_ra_info.ra_max_pages); + return -ERANGE; + } + + spin_lock(&sbi->ll_lock); + sbi->ll_ra_info.ra_max_pages_per_file = pages_number; + spin_unlock(&sbi->ll_lock); + + return count; +} +LPROC_SEQ_FOPS(ll_max_readahead_per_file_mb); + +static int ll_max_read_ahead_whole_mb_seq_show(struct seq_file *m, void *unused) +{ + struct super_block *sb = m->private; + struct ll_sb_info *sbi = ll_s2sbi(sb); + long pages_number; + int mult; + + spin_lock(&sbi->ll_lock); + pages_number = sbi->ll_ra_info.ra_max_read_ahead_whole_pages; + spin_unlock(&sbi->ll_lock); + + mult = 1 << (20 - PAGE_CACHE_SHIFT); + return lprocfs_seq_read_frac_helper(m, pages_number, mult); +} + +static ssize_t ll_max_read_ahead_whole_mb_seq_write(struct file *file, + const char *buffer, + size_t count, loff_t *off) +{ + struct super_block *sb = ((struct seq_file *)file->private_data)->private; + struct ll_sb_info *sbi = ll_s2sbi(sb); + int mult, rc, pages_number; + + mult = 1 << (20 - PAGE_CACHE_SHIFT); + rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult); + if (rc) + return rc; + + /* Cap this at the current max readahead window size, the readahead + * algorithm does this anyway so it's pointless to set it larger. */ + if (pages_number < 0 || + pages_number > sbi->ll_ra_info.ra_max_pages_per_file) { + CERROR("can't set max_read_ahead_whole_mb more than " + "max_read_ahead_per_file_mb: %lu\n", + sbi->ll_ra_info.ra_max_pages_per_file >> (20 - PAGE_CACHE_SHIFT)); + return -ERANGE; + } + + spin_lock(&sbi->ll_lock); + sbi->ll_ra_info.ra_max_read_ahead_whole_pages = pages_number; + spin_unlock(&sbi->ll_lock); + + return count; +} +LPROC_SEQ_FOPS(ll_max_read_ahead_whole_mb); + +static int ll_max_cached_mb_seq_show(struct seq_file *m, void *v) +{ + struct super_block *sb = m->private; + struct ll_sb_info *sbi = ll_s2sbi(sb); + struct cl_client_cache *cache = &sbi->ll_cache; + int shift = 20 - PAGE_CACHE_SHIFT; + int max_cached_mb; + int unused_mb; + + max_cached_mb = cache->ccc_lru_max >> shift; + unused_mb = atomic_read(&cache->ccc_lru_left) >> shift; + return seq_printf(m, + "users: %d\n" + "max_cached_mb: %d\n" + "used_mb: %d\n" + "unused_mb: %d\n" + "reclaim_count: %u\n", + atomic_read(&cache->ccc_users), + max_cached_mb, + max_cached_mb - unused_mb, + unused_mb, + cache->ccc_lru_shrinkers); +} + +static ssize_t ll_max_cached_mb_seq_write(struct file *file, const char *buffer, + size_t count, loff_t *off) +{ + struct super_block *sb = ((struct seq_file *)file->private_data)->private; + struct ll_sb_info *sbi = ll_s2sbi(sb); + struct cl_client_cache *cache = &sbi->ll_cache; + int mult, rc, pages_number; + int diff = 0; + int nrpages = 0; + ENTRY; + + mult = 1 << (20 - PAGE_CACHE_SHIFT); + buffer = lprocfs_find_named_value(buffer, "max_cached_mb:", &count); + rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult); + if (rc) + RETURN(rc); + + if (pages_number < 0 || pages_number > num_physpages) { + CERROR("%s: can't set max cache more than %lu MB\n", + ll_get_fsname(sb, NULL, 0), + num_physpages >> (20 - PAGE_CACHE_SHIFT)); + RETURN(-ERANGE); + } + + if (sbi->ll_dt_exp == NULL) + RETURN(-ENODEV); + + spin_lock(&sbi->ll_lock); + diff = pages_number - cache->ccc_lru_max; + spin_unlock(&sbi->ll_lock); + + /* easy - add more LRU slots. */ + if (diff >= 0) { + atomic_add(diff, &cache->ccc_lru_left); + GOTO(out, rc = 0); + } + + diff = -diff; + while (diff > 0) { + int tmp; + + /* reduce LRU budget from free slots. */ + do { + int ov, nv; + + ov = atomic_read(&cache->ccc_lru_left); + if (ov == 0) + break; + + nv = ov > diff ? ov - diff : 0; + rc = cfs_atomic_cmpxchg(&cache->ccc_lru_left, ov, nv); + if (likely(ov == rc)) { + diff -= ov - nv; + nrpages += ov - nv; + break; + } + } while (1); + + if (diff <= 0) + break; + + /* difficult - have to ask OSCs to drop LRU slots. */ + tmp = diff << 1; + rc = obd_set_info_async(NULL, sbi->ll_dt_exp, + sizeof(KEY_CACHE_LRU_SHRINK), + KEY_CACHE_LRU_SHRINK, + sizeof(tmp), &tmp, NULL); + if (rc < 0) + break; + } + +out: + if (rc >= 0) { + spin_lock(&sbi->ll_lock); + cache->ccc_lru_max = pages_number; + spin_unlock(&sbi->ll_lock); + rc = count; + } else { + atomic_add(nrpages, &cache->ccc_lru_left); + } + return rc; +} +LPROC_SEQ_FOPS(ll_max_cached_mb); + +static int ll_checksum_seq_show(struct seq_file *m, void *v) +{ + struct super_block *sb = m->private; + struct ll_sb_info *sbi = ll_s2sbi(sb); + + return seq_printf(m, "%u\n", (sbi->ll_flags & LL_SBI_CHECKSUM) ? 1 : 0); +} + +static ssize_t ll_checksum_seq_write(struct file *file, const char *buffer, + size_t count, loff_t *off) +{ + struct super_block *sb = ((struct seq_file *)file->private_data)->private; + struct ll_sb_info *sbi = ll_s2sbi(sb); + int val, rc; + + if (!sbi->ll_dt_exp) + /* Not set up yet */ + return -EAGAIN; + + rc = lprocfs_write_helper(buffer, count, &val); + if (rc) + return rc; + if (val) + sbi->ll_flags |= LL_SBI_CHECKSUM; + else + sbi->ll_flags &= ~LL_SBI_CHECKSUM; + + rc = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM), + KEY_CHECKSUM, sizeof(val), &val, NULL); + if (rc) + CWARN("Failed to set OSC checksum flags: %d\n", rc); + + return count; +} +LPROC_SEQ_FOPS(ll_checksum); + +static int ll_max_rw_chunk_seq_show(struct seq_file *m, void *v) +{ + struct super_block *sb = m->private; + + return seq_printf(m, "%lu\n", ll_s2sbi(sb)->ll_max_rw_chunk); +} + +static ssize_t ll_max_rw_chunk_seq_write(struct file *file, const char *buffer, + size_t count, loff_t *off) +{ + struct super_block *sb = ((struct seq_file *)file->private_data)->private; + int rc, val; + + rc = lprocfs_write_helper(buffer, count, &val); + if (rc) + return rc; + ll_s2sbi(sb)->ll_max_rw_chunk = val; + return count; +} +LPROC_SEQ_FOPS(ll_max_rw_chunk); + +static int ll_rd_track_id(struct seq_file *m, enum stats_track_type type) +{ + struct super_block *sb = m->private; + + if (ll_s2sbi(sb)->ll_stats_track_type == type) { + return seq_printf(m, "%d\n", + ll_s2sbi(sb)->ll_stats_track_id); + + } else if (ll_s2sbi(sb)->ll_stats_track_type == STATS_TRACK_ALL) { + return seq_printf(m, "0 (all)\n"); + } else { + return seq_printf(m, "untracked\n"); + } +} + +static int ll_wr_track_id(const char *buffer, unsigned long count, void *data, + enum stats_track_type type) +{ + struct super_block *sb = data; + int rc, pid; + + rc = lprocfs_write_helper(buffer, count, &pid); + if (rc) + return rc; + ll_s2sbi(sb)->ll_stats_track_id = pid; + if (pid == 0) + ll_s2sbi(sb)->ll_stats_track_type = STATS_TRACK_ALL; + else + ll_s2sbi(sb)->ll_stats_track_type = type; + lprocfs_clear_stats(ll_s2sbi(sb)->ll_stats); + return count; +} + +static int ll_track_pid_seq_show(struct seq_file *m, void *v) +{ + return ll_rd_track_id(m, STATS_TRACK_PID); +} + +static ssize_t ll_track_pid_seq_write(struct file *file, const char *buffer, + size_t count, loff_t *off) +{ + struct seq_file *seq = file->private_data; + return ll_wr_track_id(buffer, count, seq->private, STATS_TRACK_PID); +} +LPROC_SEQ_FOPS(ll_track_pid); + +static int ll_track_ppid_seq_show(struct seq_file *m, void *v) +{ + return ll_rd_track_id(m, STATS_TRACK_PPID); +} + +static ssize_t ll_track_ppid_seq_write(struct file *file, const char *buffer, + size_t count, loff_t *off) +{ + struct seq_file *seq = file->private_data; + return ll_wr_track_id(buffer, count, seq->private, STATS_TRACK_PPID); +} +LPROC_SEQ_FOPS(ll_track_ppid); + +static int ll_track_gid_seq_show(struct seq_file *m, void *v) +{ + return ll_rd_track_id(m, STATS_TRACK_GID); +} + +static ssize_t ll_track_gid_seq_write(struct file *file, const char *buffer, + size_t count, loff_t *off) +{ + struct seq_file *seq = file->private_data; + return ll_wr_track_id(buffer, count, seq->private, STATS_TRACK_GID); +} +LPROC_SEQ_FOPS(ll_track_gid); + +static int ll_statahead_max_seq_show(struct seq_file *m, void *v) +{ + struct super_block *sb = m->private; + struct ll_sb_info *sbi = ll_s2sbi(sb); + + return seq_printf(m, "%u\n", sbi->ll_sa_max); +} + +static ssize_t ll_statahead_max_seq_write(struct file *file, const char *buffer, + size_t count, loff_t *off) +{ + struct super_block *sb = ((struct seq_file *)file->private_data)->private; + struct ll_sb_info *sbi = ll_s2sbi(sb); + int val, rc; + + rc = lprocfs_write_helper(buffer, count, &val); + if (rc) + return rc; + + if (val >= 0 && val <= LL_SA_RPC_MAX) + sbi->ll_sa_max = val; + else + CERROR("Bad statahead_max value %d. Valid values are in the " + "range [0, %d]\n", val, LL_SA_RPC_MAX); + + return count; +} +LPROC_SEQ_FOPS(ll_statahead_max); + +static int ll_statahead_agl_seq_show(struct seq_file *m, void *v) +{ + struct super_block *sb = m->private; + struct ll_sb_info *sbi = ll_s2sbi(sb); + + return seq_printf(m, "%u\n", + sbi->ll_flags & LL_SBI_AGL_ENABLED ? 1 : 0); +} + +static ssize_t ll_statahead_agl_seq_write(struct file *file, const char *buffer, + size_t count, loff_t *off) +{ + struct super_block *sb = ((struct seq_file *)file->private_data)->private; + struct ll_sb_info *sbi = ll_s2sbi(sb); + int val, rc; + + rc = lprocfs_write_helper(buffer, count, &val); + if (rc) + return rc; + + if (val) + sbi->ll_flags |= LL_SBI_AGL_ENABLED; + else + sbi->ll_flags &= ~LL_SBI_AGL_ENABLED; + + return count; +} +LPROC_SEQ_FOPS(ll_statahead_agl); + +static int ll_statahead_stats_seq_show(struct seq_file *m, void *v) +{ + struct super_block *sb = m->private; + struct ll_sb_info *sbi = ll_s2sbi(sb); + + return seq_printf(m, + "statahead total: %u\n" + "statahead wrong: %u\n" + "agl total: %u\n", + atomic_read(&sbi->ll_sa_total), + atomic_read(&sbi->ll_sa_wrong), + atomic_read(&sbi->ll_agl_total)); +} +LPROC_SEQ_FOPS_RO(ll_statahead_stats); + +static int ll_lazystatfs_seq_show(struct seq_file *m, void *v) +{ + struct super_block *sb = m->private; + struct ll_sb_info *sbi = ll_s2sbi(sb); + + return seq_printf(m, "%u\n", + (sbi->ll_flags & LL_SBI_LAZYSTATFS) ? 1 : 0); +} + +static ssize_t ll_lazystatfs_seq_write(struct file *file, const char *buffer, + size_t count, loff_t *off) +{ + struct super_block *sb = ((struct seq_file *)file->private_data)->private; + struct ll_sb_info *sbi = ll_s2sbi(sb); + int val, rc; + + rc = lprocfs_write_helper(buffer, count, &val); + if (rc) + return rc; + + if (val) + sbi->ll_flags |= LL_SBI_LAZYSTATFS; + else + sbi->ll_flags &= ~LL_SBI_LAZYSTATFS; + + return count; +} +LPROC_SEQ_FOPS(ll_lazystatfs); + +static int ll_maxea_size_seq_show(struct seq_file *m, void *v) +{ + struct super_block *sb = m->private; + struct ll_sb_info *sbi = ll_s2sbi(sb); + unsigned int ealen; + int rc; + + rc = ll_get_max_mdsize(sbi, &ealen); + if (rc) + return rc; + + return seq_printf(m, "%u\n", ealen); +} +LPROC_SEQ_FOPS_RO(ll_maxea_size); + +static int ll_sbi_flags_seq_show(struct seq_file *m, void *v) +{ + const char *str[] = LL_SBI_FLAGS; + struct super_block *sb = m->private; + int flags = ll_s2sbi(sb)->ll_flags; + int i = 0; + + while (flags != 0) { + if (ARRAY_SIZE(str) <= i) { + CERROR("%s: Revise array LL_SBI_FLAGS to match sbi " + "flags please.\n", ll_get_fsname(sb, NULL, 0)); + return -EINVAL; + } + + if (flags & 0x1) + seq_printf(m, "%s ", str[i]); + flags >>= 1; + ++i; + } + seq_printf(m, "\b\n"); + return 0; +} +LPROC_SEQ_FOPS_RO(ll_sbi_flags); + +static struct lprocfs_vars lprocfs_llite_obd_vars[] = { + { "uuid", &ll_sb_uuid_fops, 0, 0 }, + //{ "mntpt_path", ll_rd_path, 0, 0 }, + { "fstype", &ll_fstype_fops, 0, 0 }, + { "site", &ll_site_stats_fops, 0, 0 }, + { "blocksize", &ll_blksize_fops, 0, 0 }, + { "kbytestotal", &ll_kbytestotal_fops, 0, 0 }, + { "kbytesfree", &ll_kbytesfree_fops, 0, 0 }, + { "kbytesavail", &ll_kbytesavail_fops, 0, 0 }, + { "filestotal", &ll_filestotal_fops, 0, 0 }, + { "filesfree", &ll_filesfree_fops, 0, 0 }, + { "client_type", &ll_client_type_fops, 0, 0 }, + //{ "filegroups", lprocfs_rd_filegroups, 0, 0 }, + { "max_read_ahead_mb", &ll_max_readahead_mb_fops, 0 }, + { "max_read_ahead_per_file_mb", &ll_max_readahead_per_file_mb_fops, 0 }, + { "max_read_ahead_whole_mb", &ll_max_read_ahead_whole_mb_fops, 0 }, + { "max_cached_mb", &ll_max_cached_mb_fops, 0 }, + { "checksum_pages", &ll_checksum_fops, 0 }, + { "max_rw_chunk", &ll_max_rw_chunk_fops, 0 }, + { "stats_track_pid", &ll_track_pid_fops, 0 }, + { "stats_track_ppid", &ll_track_ppid_fops, 0 }, + { "stats_track_gid", &ll_track_gid_fops, 0 }, + { "statahead_max", &ll_statahead_max_fops, 0 }, + { "statahead_agl", &ll_statahead_agl_fops, 0 }, + { "statahead_stats", &ll_statahead_stats_fops, 0, 0 }, + { "lazystatfs", &ll_lazystatfs_fops, 0 }, + { "max_easize", &ll_maxea_size_fops, 0, 0 }, + { "sbi_flags", &ll_sbi_flags_fops, 0, 0 }, + { 0 } +}; + +#define MAX_STRING_SIZE 128 + +struct llite_file_opcode { + __u32 opcode; + __u32 type; + const char *opname; +} llite_opcode_table[LPROC_LL_FILE_OPCODES] = { + /* file operation */ + { LPROC_LL_DIRTY_HITS, LPROCFS_TYPE_REGS, "dirty_pages_hits" }, + { LPROC_LL_DIRTY_MISSES, LPROCFS_TYPE_REGS, "dirty_pages_misses" }, + { LPROC_LL_READ_BYTES, LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES, + "read_bytes" }, + { LPROC_LL_WRITE_BYTES, LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES, + "write_bytes" }, + { LPROC_LL_BRW_READ, LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES, + "brw_read" }, + { LPROC_LL_BRW_WRITE, LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_PAGES, + "brw_write" }, + { LPROC_LL_OSC_READ, LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES, + "osc_read" }, + { LPROC_LL_OSC_WRITE, LPROCFS_CNTR_AVGMINMAX|LPROCFS_TYPE_BYTES, + "osc_write" }, + { LPROC_LL_IOCTL, LPROCFS_TYPE_REGS, "ioctl" }, + { LPROC_LL_OPEN, LPROCFS_TYPE_REGS, "open" }, + { LPROC_LL_RELEASE, LPROCFS_TYPE_REGS, "close" }, + { LPROC_LL_MAP, LPROCFS_TYPE_REGS, "mmap" }, + { LPROC_LL_LLSEEK, LPROCFS_TYPE_REGS, "seek" }, + { LPROC_LL_FSYNC, LPROCFS_TYPE_REGS, "fsync" }, + { LPROC_LL_READDIR, LPROCFS_TYPE_REGS, "readdir" }, + /* inode operation */ + { LPROC_LL_SETATTR, LPROCFS_TYPE_REGS, "setattr" }, + { LPROC_LL_TRUNC, LPROCFS_TYPE_REGS, "truncate" }, + { LPROC_LL_FLOCK, LPROCFS_TYPE_REGS, "flock" }, + { LPROC_LL_GETATTR, LPROCFS_TYPE_REGS, "getattr" }, + /* dir inode operation */ + { LPROC_LL_CREATE, LPROCFS_TYPE_REGS, "create" }, + { LPROC_LL_LINK, LPROCFS_TYPE_REGS, "link" }, + { LPROC_LL_UNLINK, LPROCFS_TYPE_REGS, "unlink" }, + { LPROC_LL_SYMLINK, LPROCFS_TYPE_REGS, "symlink" }, + { LPROC_LL_MKDIR, LPROCFS_TYPE_REGS, "mkdir" }, + { LPROC_LL_RMDIR, LPROCFS_TYPE_REGS, "rmdir" }, + { LPROC_LL_MKNOD, LPROCFS_TYPE_REGS, "mknod" }, + { LPROC_LL_RENAME, LPROCFS_TYPE_REGS, "rename" }, + /* special inode operation */ + { LPROC_LL_STAFS, LPROCFS_TYPE_REGS, "statfs" }, + { LPROC_LL_ALLOC_INODE, LPROCFS_TYPE_REGS, "alloc_inode" }, + { LPROC_LL_SETXATTR, LPROCFS_TYPE_REGS, "setxattr" }, + { LPROC_LL_GETXATTR, LPROCFS_TYPE_REGS, "getxattr" }, + { LPROC_LL_LISTXATTR, LPROCFS_TYPE_REGS, "listxattr" }, + { LPROC_LL_REMOVEXATTR, LPROCFS_TYPE_REGS, "removexattr" }, + { LPROC_LL_INODE_PERM, LPROCFS_TYPE_REGS, "inode_permission" }, +}; + +void ll_stats_ops_tally(struct ll_sb_info *sbi, int op, int count) +{ + if (!sbi->ll_stats) + return; + if (sbi->ll_stats_track_type == STATS_TRACK_ALL) + lprocfs_counter_add(sbi->ll_stats, op, count); + else if (sbi->ll_stats_track_type == STATS_TRACK_PID && + sbi->ll_stats_track_id == current->pid) + lprocfs_counter_add(sbi->ll_stats, op, count); + else if (sbi->ll_stats_track_type == STATS_TRACK_PPID && + sbi->ll_stats_track_id == current->parent->pid) + lprocfs_counter_add(sbi->ll_stats, op, count); + else if (sbi->ll_stats_track_type == STATS_TRACK_GID && + sbi->ll_stats_track_id == current_gid()) + lprocfs_counter_add(sbi->ll_stats, op, count); +} +EXPORT_SYMBOL(ll_stats_ops_tally); + +static const char *ra_stat_string[] = { + [RA_STAT_HIT] = "hits", + [RA_STAT_MISS] = "misses", + [RA_STAT_DISTANT_READPAGE] = "readpage not consecutive", + [RA_STAT_MISS_IN_WINDOW] = "miss inside window", + [RA_STAT_FAILED_GRAB_PAGE] = "failed grab_cache_page", + [RA_STAT_FAILED_MATCH] = "failed lock match", + [RA_STAT_DISCARDED] = "read but discarded", + [RA_STAT_ZERO_LEN] = "zero length file", + [RA_STAT_ZERO_WINDOW] = "zero size window", + [RA_STAT_EOF] = "read-ahead to EOF", + [RA_STAT_MAX_IN_FLIGHT] = "hit max r-a issue", + [RA_STAT_WRONG_GRAB_PAGE] = "wrong page from grab_cache_page", +}; + +LPROC_SEQ_FOPS_RO_TYPE(llite, name); +LPROC_SEQ_FOPS_RO_TYPE(llite, uuid); + +int lprocfs_register_mountpoint(struct proc_dir_entry *parent, + struct super_block *sb, char *osc, char *mdc) +{ + struct lprocfs_vars lvars[2]; + struct lustre_sb_info *lsi = s2lsi(sb); + struct ll_sb_info *sbi = ll_s2sbi(sb); + struct obd_device *obd; + proc_dir_entry_t *dir; + char name[MAX_STRING_SIZE + 1], *ptr; + int err, id, len, rc; + ENTRY; + + memset(lvars, 0, sizeof(lvars)); + + name[MAX_STRING_SIZE] = '\0'; + lvars[0].name = name; + + LASSERT(sbi != NULL); + LASSERT(mdc != NULL); + LASSERT(osc != NULL); + + /* Get fsname */ + len = strlen(lsi->lsi_lmd->lmd_profile); + ptr = strrchr(lsi->lsi_lmd->lmd_profile, '-'); + if (ptr && (strcmp(ptr, "-client") == 0)) + len -= 7; + + /* Mount info */ + snprintf(name, MAX_STRING_SIZE, "%.*s-%p", len, + lsi->lsi_lmd->lmd_profile, sb); + + sbi->ll_proc_root = lprocfs_register(name, parent, NULL, NULL); + if (IS_ERR(sbi->ll_proc_root)) { + err = PTR_ERR(sbi->ll_proc_root); + sbi->ll_proc_root = NULL; + RETURN(err); + } + + rc = lprocfs_seq_create(sbi->ll_proc_root, "dump_page_cache", 0444, + &vvp_dump_pgcache_file_ops, sbi); + if (rc) + CWARN("Error adding the dump_page_cache file\n"); + + rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats", 0644, + &ll_rw_extents_stats_fops, sbi); + if (rc) + CWARN("Error adding the extent_stats file\n"); + + rc = lprocfs_seq_create(sbi->ll_proc_root, "extents_stats_per_process", + 0644, &ll_rw_extents_stats_pp_fops, sbi); + if (rc) + CWARN("Error adding the extents_stats_per_process file\n"); + + rc = lprocfs_seq_create(sbi->ll_proc_root, "offset_stats", 0644, + &ll_rw_offset_stats_fops, sbi); + if (rc) + CWARN("Error adding the offset_stats file\n"); + + /* File operations stats */ + sbi->ll_stats = lprocfs_alloc_stats(LPROC_LL_FILE_OPCODES, + LPROCFS_STATS_FLAG_NONE); + if (sbi->ll_stats == NULL) + GOTO(out, err = -ENOMEM); + /* do counter init */ + for (id = 0; id < LPROC_LL_FILE_OPCODES; id++) { + __u32 type = llite_opcode_table[id].type; + void *ptr = NULL; + if (type & LPROCFS_TYPE_REGS) + ptr = "regs"; + else if (type & LPROCFS_TYPE_BYTES) + ptr = "bytes"; + else if (type & LPROCFS_TYPE_PAGES) + ptr = "pages"; + lprocfs_counter_init(sbi->ll_stats, + llite_opcode_table[id].opcode, + (type & LPROCFS_CNTR_AVGMINMAX), + llite_opcode_table[id].opname, ptr); + } + err = lprocfs_register_stats(sbi->ll_proc_root, "stats", sbi->ll_stats); + if (err) + GOTO(out, err); + + sbi->ll_ra_stats = lprocfs_alloc_stats(ARRAY_SIZE(ra_stat_string), + LPROCFS_STATS_FLAG_NONE); + if (sbi->ll_ra_stats == NULL) + GOTO(out, err = -ENOMEM); + + for (id = 0; id < ARRAY_SIZE(ra_stat_string); id++) + lprocfs_counter_init(sbi->ll_ra_stats, id, 0, + ra_stat_string[id], "pages"); + err = lprocfs_register_stats(sbi->ll_proc_root, "read_ahead_stats", + sbi->ll_ra_stats); + if (err) + GOTO(out, err); + + + err = lprocfs_add_vars(sbi->ll_proc_root, lprocfs_llite_obd_vars, sb); + if (err) + GOTO(out, err); + + /* MDC info */ + obd = class_name2obd(mdc); + + LASSERT(obd != NULL); + LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC); + LASSERT(obd->obd_type->typ_name != NULL); + + dir = proc_mkdir(obd->obd_type->typ_name, sbi->ll_proc_root); + if (dir == NULL) + GOTO(out, err = -ENOMEM); + + snprintf(name, MAX_STRING_SIZE, "common_name"); + lvars[0].fops = &llite_name_fops; + err = lprocfs_add_vars(dir, lvars, obd); + if (err) + GOTO(out, err); + + snprintf(name, MAX_STRING_SIZE, "uuid"); + lvars[0].fops = &llite_uuid_fops; + err = lprocfs_add_vars(dir, lvars, obd); + if (err) + GOTO(out, err); + + /* OSC */ + obd = class_name2obd(osc); + + LASSERT(obd != NULL); + LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC); + LASSERT(obd->obd_type->typ_name != NULL); + + dir = proc_mkdir(obd->obd_type->typ_name, sbi->ll_proc_root); + if (dir == NULL) + GOTO(out, err = -ENOMEM); + + snprintf(name, MAX_STRING_SIZE, "common_name"); + lvars[0].fops = &llite_name_fops; + err = lprocfs_add_vars(dir, lvars, obd); + if (err) + GOTO(out, err); + + snprintf(name, MAX_STRING_SIZE, "uuid"); + lvars[0].fops = &llite_uuid_fops; + err = lprocfs_add_vars(dir, lvars, obd); +out: + if (err) { + lprocfs_remove(&sbi->ll_proc_root); + lprocfs_free_stats(&sbi->ll_ra_stats); + lprocfs_free_stats(&sbi->ll_stats); + } + RETURN(err); +} + +void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi) +{ + if (sbi->ll_proc_root) { + lprocfs_remove(&sbi->ll_proc_root); + lprocfs_free_stats(&sbi->ll_ra_stats); + lprocfs_free_stats(&sbi->ll_stats); + } +} +#undef MAX_STRING_SIZE + +#define pct(a,b) (b ? a * 100 / b : 0) + +static void ll_display_extents_info(struct ll_rw_extents_info *io_extents, + struct seq_file *seq, int which) +{ + unsigned long read_tot = 0, write_tot = 0, read_cum, write_cum; + unsigned long start, end, r, w; + char *unitp = "KMGTPEZY"; + int i, units = 10; + struct per_process_info *pp_info = &io_extents->pp_extents[which]; + + read_cum = 0; + write_cum = 0; + start = 0; + + for(i = 0; i < LL_HIST_MAX; i++) { + read_tot += pp_info->pp_r_hist.oh_buckets[i]; + write_tot += pp_info->pp_w_hist.oh_buckets[i]; + } + + for(i = 0; i < LL_HIST_MAX; i++) { + r = pp_info->pp_r_hist.oh_buckets[i]; + w = pp_info->pp_w_hist.oh_buckets[i]; + read_cum += r; + write_cum += w; + end = 1 << (i + LL_HIST_START - units); + seq_printf(seq, "%4lu%c - %4lu%c%c: %14lu %4lu %4lu | " + "%14lu %4lu %4lu\n", start, *unitp, end, *unitp, + (i == LL_HIST_MAX - 1) ? '+' : ' ', + r, pct(r, read_tot), pct(read_cum, read_tot), + w, pct(w, write_tot), pct(write_cum, write_tot)); + start = end; + if (start == 1<<10) { + start = 1; + units += 10; + unitp++; + } + if (read_cum == read_tot && write_cum == write_tot) + break; + } +} + +static int ll_rw_extents_stats_pp_seq_show(struct seq_file *seq, void *v) +{ + struct timeval now; + struct ll_sb_info *sbi = seq->private; + struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info; + int k; + + do_gettimeofday(&now); + + if (!sbi->ll_rw_stats_on) { + seq_printf(seq, "disabled\n" + "write anything in this file to activate, " + "then 0 or \"[D/d]isabled\" to deactivate\n"); + return 0; + } + seq_printf(seq, "snapshot_time: %lu.%lu (secs.usecs)\n", + now.tv_sec, now.tv_usec); + seq_printf(seq, "%15s %19s | %20s\n", " ", "read", "write"); + seq_printf(seq, "%13s %14s %4s %4s | %14s %4s %4s\n", + "extents", "calls", "%", "cum%", + "calls", "%", "cum%"); + spin_lock(&sbi->ll_pp_extent_lock); + for (k = 0; k < LL_PROCESS_HIST_MAX; k++) { + if (io_extents->pp_extents[k].pid != 0) { + seq_printf(seq, "\nPID: %d\n", + io_extents->pp_extents[k].pid); + ll_display_extents_info(io_extents, seq, k); + } + } + spin_unlock(&sbi->ll_pp_extent_lock); + return 0; +} + +static ssize_t ll_rw_extents_stats_pp_seq_write(struct file *file, + const char *buf, size_t len, + loff_t *off) +{ + struct seq_file *seq = file->private_data; + struct ll_sb_info *sbi = seq->private; + struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info; + int i; + int value = 1, rc = 0; + + rc = lprocfs_write_helper(buf, len, &value); + if (rc < 0 && (strcmp(buf, "disabled") == 0 || + strcmp(buf, "Disabled") == 0)) + value = 0; + + if (value == 0) + sbi->ll_rw_stats_on = 0; + else + sbi->ll_rw_stats_on = 1; + + spin_lock(&sbi->ll_pp_extent_lock); + for (i = 0; i < LL_PROCESS_HIST_MAX; i++) { + io_extents->pp_extents[i].pid = 0; + lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist); + lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist); + } + spin_unlock(&sbi->ll_pp_extent_lock); + return len; +} + +LPROC_SEQ_FOPS(ll_rw_extents_stats_pp); + +static int ll_rw_extents_stats_seq_show(struct seq_file *seq, void *v) +{ + struct timeval now; + struct ll_sb_info *sbi = seq->private; + struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info; + + do_gettimeofday(&now); + + if (!sbi->ll_rw_stats_on) { + seq_printf(seq, "disabled\n" + "write anything in this file to activate, " + "then 0 or \"[D/d]isabled\" to deactivate\n"); + return 0; + } + seq_printf(seq, "snapshot_time: %lu.%lu (secs.usecs)\n", + now.tv_sec, now.tv_usec); + + seq_printf(seq, "%15s %19s | %20s\n", " ", "read", "write"); + seq_printf(seq, "%13s %14s %4s %4s | %14s %4s %4s\n", + "extents", "calls", "%", "cum%", + "calls", "%", "cum%"); + spin_lock(&sbi->ll_lock); + ll_display_extents_info(io_extents, seq, LL_PROCESS_HIST_MAX); + spin_unlock(&sbi->ll_lock); + + return 0; +} + +static ssize_t ll_rw_extents_stats_seq_write(struct file *file, const char *buf, + size_t len, loff_t *off) +{ + struct seq_file *seq = file->private_data; + struct ll_sb_info *sbi = seq->private; + struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info; + int i; + int value = 1, rc = 0; + + rc = lprocfs_write_helper(buf, len, &value); + if (rc < 0 && (strcmp(buf, "disabled") == 0 || + strcmp(buf, "Disabled") == 0)) + value = 0; + + if (value == 0) + sbi->ll_rw_stats_on = 0; + else + sbi->ll_rw_stats_on = 1; + spin_lock(&sbi->ll_pp_extent_lock); + for (i = 0; i <= LL_PROCESS_HIST_MAX; i++) { + io_extents->pp_extents[i].pid = 0; + lprocfs_oh_clear(&io_extents->pp_extents[i].pp_r_hist); + lprocfs_oh_clear(&io_extents->pp_extents[i].pp_w_hist); + } + spin_unlock(&sbi->ll_pp_extent_lock); + + return len; +} + +LPROC_SEQ_FOPS(ll_rw_extents_stats); + +void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid, + struct ll_file_data *file, loff_t pos, + size_t count, int rw) +{ + int i, cur = -1; + struct ll_rw_process_info *process; + struct ll_rw_process_info *offset; + int *off_count = &sbi->ll_rw_offset_entry_count; + int *process_count = &sbi->ll_offset_process_count; + struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info; + + if(!sbi->ll_rw_stats_on) + return; + process = sbi->ll_rw_process_info; + offset = sbi->ll_rw_offset_info; + + spin_lock(&sbi->ll_pp_extent_lock); + /* Extent statistics */ + for(i = 0; i < LL_PROCESS_HIST_MAX; i++) { + if(io_extents->pp_extents[i].pid == pid) { + cur = i; + break; + } + } + + if (cur == -1) { + /* new process */ + sbi->ll_extent_process_count = + (sbi->ll_extent_process_count + 1) % LL_PROCESS_HIST_MAX; + cur = sbi->ll_extent_process_count; + io_extents->pp_extents[cur].pid = pid; + lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_r_hist); + lprocfs_oh_clear(&io_extents->pp_extents[cur].pp_w_hist); + } + + for(i = 0; (count >= (1 << LL_HIST_START << i)) && + (i < (LL_HIST_MAX - 1)); i++); + if (rw == 0) { + io_extents->pp_extents[cur].pp_r_hist.oh_buckets[i]++; + io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_r_hist.oh_buckets[i]++; + } else { + io_extents->pp_extents[cur].pp_w_hist.oh_buckets[i]++; + io_extents->pp_extents[LL_PROCESS_HIST_MAX].pp_w_hist.oh_buckets[i]++; + } + spin_unlock(&sbi->ll_pp_extent_lock); + + spin_lock(&sbi->ll_process_lock); + /* Offset statistics */ + for (i = 0; i < LL_PROCESS_HIST_MAX; i++) { + if (process[i].rw_pid == pid) { + if (process[i].rw_last_file != file) { + process[i].rw_range_start = pos; + process[i].rw_last_file_pos = pos + count; + process[i].rw_smallest_extent = count; + process[i].rw_largest_extent = count; + process[i].rw_offset = 0; + process[i].rw_last_file = file; + spin_unlock(&sbi->ll_process_lock); + return; + } + if (process[i].rw_last_file_pos != pos) { + *off_count = + (*off_count + 1) % LL_OFFSET_HIST_MAX; + offset[*off_count].rw_op = process[i].rw_op; + offset[*off_count].rw_pid = pid; + offset[*off_count].rw_range_start = + process[i].rw_range_start; + offset[*off_count].rw_range_end = + process[i].rw_last_file_pos; + offset[*off_count].rw_smallest_extent = + process[i].rw_smallest_extent; + offset[*off_count].rw_largest_extent = + process[i].rw_largest_extent; + offset[*off_count].rw_offset = + process[i].rw_offset; + process[i].rw_op = rw; + process[i].rw_range_start = pos; + process[i].rw_smallest_extent = count; + process[i].rw_largest_extent = count; + process[i].rw_offset = pos - + process[i].rw_last_file_pos; + } + if(process[i].rw_smallest_extent > count) + process[i].rw_smallest_extent = count; + if(process[i].rw_largest_extent < count) + process[i].rw_largest_extent = count; + process[i].rw_last_file_pos = pos + count; + spin_unlock(&sbi->ll_process_lock); + return; + } + } + *process_count = (*process_count + 1) % LL_PROCESS_HIST_MAX; + process[*process_count].rw_pid = pid; + process[*process_count].rw_op = rw; + process[*process_count].rw_range_start = pos; + process[*process_count].rw_last_file_pos = pos + count; + process[*process_count].rw_smallest_extent = count; + process[*process_count].rw_largest_extent = count; + process[*process_count].rw_offset = 0; + process[*process_count].rw_last_file = file; + spin_unlock(&sbi->ll_process_lock); +} + +static int ll_rw_offset_stats_seq_show(struct seq_file *seq, void *v) +{ + struct timeval now; + struct ll_sb_info *sbi = seq->private; + struct ll_rw_process_info *offset = sbi->ll_rw_offset_info; + struct ll_rw_process_info *process = sbi->ll_rw_process_info; + int i; + + do_gettimeofday(&now); + + if (!sbi->ll_rw_stats_on) { + seq_printf(seq, "disabled\n" + "write anything in this file to activate, " + "then 0 or \"[D/d]isabled\" to deactivate\n"); + return 0; + } + spin_lock(&sbi->ll_process_lock); + + seq_printf(seq, "snapshot_time: %lu.%lu (secs.usecs)\n", + now.tv_sec, now.tv_usec); + seq_printf(seq, "%3s %10s %14s %14s %17s %17s %14s\n", + "R/W", "PID", "RANGE START", "RANGE END", + "SMALLEST EXTENT", "LARGEST EXTENT", "OFFSET"); + /* We stored the discontiguous offsets here; print them first */ + for(i = 0; i < LL_OFFSET_HIST_MAX; i++) { + if (offset[i].rw_pid != 0) + seq_printf(seq,"%3c %10d %14Lu %14Lu %17lu %17lu %14Lu", + offset[i].rw_op ? 'W' : 'R', + offset[i].rw_pid, + offset[i].rw_range_start, + offset[i].rw_range_end, + (unsigned long)offset[i].rw_smallest_extent, + (unsigned long)offset[i].rw_largest_extent, + offset[i].rw_offset); + } + /* Then print the current offsets for each process */ + for(i = 0; i < LL_PROCESS_HIST_MAX; i++) { + if (process[i].rw_pid != 0) + seq_printf(seq,"%3c %10d %14Lu %14Lu %17lu %17lu %14Lu", + process[i].rw_op ? 'W' : 'R', + process[i].rw_pid, + process[i].rw_range_start, + process[i].rw_last_file_pos, + (unsigned long)process[i].rw_smallest_extent, + (unsigned long)process[i].rw_largest_extent, + process[i].rw_offset); + } + spin_unlock(&sbi->ll_process_lock); + + return 0; +} + +static ssize_t ll_rw_offset_stats_seq_write(struct file *file, const char *buf, + size_t len, loff_t *off) +{ + struct seq_file *seq = file->private_data; + struct ll_sb_info *sbi = seq->private; + struct ll_rw_process_info *process_info = sbi->ll_rw_process_info; + struct ll_rw_process_info *offset_info = sbi->ll_rw_offset_info; + int value = 1, rc = 0; + + rc = lprocfs_write_helper(buf, len, &value); + + if (rc < 0 && (strcmp(buf, "disabled") == 0 || + strcmp(buf, "Disabled") == 0)) + value = 0; + + if (value == 0) + sbi->ll_rw_stats_on = 0; + else + sbi->ll_rw_stats_on = 1; + + spin_lock(&sbi->ll_process_lock); + sbi->ll_offset_process_count = 0; + sbi->ll_rw_offset_entry_count = 0; + memset(process_info, 0, sizeof(struct ll_rw_process_info) * + LL_PROCESS_HIST_MAX); + memset(offset_info, 0, sizeof(struct ll_rw_process_info) * + LL_OFFSET_HIST_MAX); + spin_unlock(&sbi->ll_process_lock); + + return len; +} + +LPROC_SEQ_FOPS(ll_rw_offset_stats); + +void lprocfs_llite_init_vars(struct lprocfs_static_vars *lvars) +{ + lvars->module_vars = NULL; + lvars->obd_vars = lprocfs_llite_obd_vars; +} +#endif /* LPROCFS */ |