/* * 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) 2012, 2017, 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 #include #ifdef HAVE_UIDGID_HEADER # include #endif #include #include #include #include "llite_internal.h" #include "vvp_internal.h" struct proc_dir_entry *proc_lustre_fs_root; #ifdef CONFIG_PROC_FS /* /proc/lustre/llite mount point registration */ static const struct file_operations ll_rw_extents_stats_fops; static const struct file_operations ll_rw_extents_stats_pp_fops; static const struct file_operations ll_rw_offset_stats_fops; static __s64 ll_stats_pid_write(const char __user *buf, size_t len); static int ll_blksize_seq_show(struct seq_file *m, void *v) { struct super_block *sb = m->private; struct obd_statfs osfs; int rc; LASSERT(sb != NULL); rc = ll_statfs_internal(sb, &osfs, OBD_STATFS_NODELAY); if (!rc) seq_printf(m, "%u\n", osfs.os_bsize); return rc; } LPROC_SEQ_FOPS_RO(ll_blksize); static int ll_stat_blksize_seq_show(struct seq_file *m, void *v) { struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private); seq_printf(m, "%u\n", sbi->ll_stat_blksize); return 0; } static ssize_t ll_stat_blksize_seq_write(struct file *file, const char __user *buffer, size_t count, loff_t *off) { struct seq_file *m = file->private_data; struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private); unsigned int val; int rc; rc = kstrtouint_from_user(buffer, count, 0, &val); if (rc) return rc; if (val != 0 && (val < PAGE_SIZE || (val & (val - 1))) != 0) return -ERANGE; sbi->ll_stat_blksize = val; return count; } LPROC_SEQ_FOPS(ll_stat_blksize); static int ll_kbytestotal_seq_show(struct seq_file *m, void *v) { struct super_block *sb = m->private; struct obd_statfs osfs; int rc; LASSERT(sb != NULL); rc = ll_statfs_internal(sb, &osfs, OBD_STATFS_NODELAY); if (!rc) { __u32 blk_size = osfs.os_bsize >> 10; __u64 result = osfs.os_blocks; while (blk_size >>= 1) result <<= 1; seq_printf(m, "%llu\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 = m->private; struct obd_statfs osfs; int rc; LASSERT(sb != NULL); rc = ll_statfs_internal(sb, &osfs, OBD_STATFS_NODELAY); if (!rc) { __u32 blk_size = osfs.os_bsize >> 10; __u64 result = osfs.os_bfree; while (blk_size >>= 1) result <<= 1; seq_printf(m, "%llu\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 = m->private; struct obd_statfs osfs; int rc; LASSERT(sb != NULL); rc = ll_statfs_internal(sb, &osfs, OBD_STATFS_NODELAY); if (!rc) { __u32 blk_size = osfs.os_bsize >> 10; __u64 result = osfs.os_bavail; while (blk_size >>= 1) result <<= 1; seq_printf(m, "%llu\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 = m->private; struct obd_statfs osfs; int rc; LASSERT(sb != NULL); rc = ll_statfs_internal(sb, &osfs, OBD_STATFS_NODELAY); if (!rc) seq_printf(m, "%llu\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 = m->private; struct obd_statfs osfs; int rc; LASSERT(sb != NULL); rc = ll_statfs_internal(sb, &osfs, OBD_STATFS_NODELAY); if (!rc) seq_printf(m, "%llu\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); LASSERT(sbi != NULL); seq_puts(m, "local client\n"); return 0; } LPROC_SEQ_FOPS_RO(ll_client_type); static int ll_fstype_seq_show(struct seq_file *m, void *v) { struct super_block *sb = m->private; LASSERT(sb != NULL); seq_printf(m, "%s\n", sb->s_type->name); return 0; } LPROC_SEQ_FOPS_RO(ll_fstype); static int ll_sb_uuid_seq_show(struct seq_file *m, void *v) { struct super_block *sb = m->private; LASSERT(sb != NULL); seq_printf(m, "%s\n", ll_s2sbi(sb)->ll_sb_uuid.uuid); return 0; } LPROC_SEQ_FOPS_RO(ll_sb_uuid); static int ll_xattr_cache_seq_show(struct seq_file *m, void *v) { struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private); seq_printf(m, "%u\n", sbi->ll_xattr_cache_enabled); return 0; } static ssize_t ll_xattr_cache_seq_write(struct file *file, const char __user *buffer, size_t count, loff_t *off) { struct seq_file *m = file->private_data; struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private); bool val; int rc; rc = kstrtobool_from_user(buffer, count, &val); if (rc) return rc; if (val && !(sbi->ll_flags & LL_SBI_XATTR_CACHE)) return -ENOTSUPP; sbi->ll_xattr_cache_enabled = val; sbi->ll_xattr_cache_set = 1; return count; } LPROC_SEQ_FOPS(ll_xattr_cache); 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_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 __user *buffer, size_t count, loff_t *off) { struct seq_file *m = file->private_data; struct super_block *sb = m->private; struct ll_sb_info *sbi = ll_s2sbi(sb); __s64 pages_number; int rc; 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 > totalram_pages / 2) { /* 1/2 of RAM */ CERROR("%s: can't set max_readahead_mb=%lu > %luMB\n", ll_get_fsname(sb, NULL, 0), (unsigned long)pages_number >> (20 - PAGE_SHIFT), totalram_pages >> (20 - PAGE_SHIFT + 1)); 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_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 __user *buffer, size_t count, loff_t *off) { struct seq_file *m = file->private_data; struct super_block *sb = m->private; struct ll_sb_info *sbi = ll_s2sbi(sb); 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 > sbi->ll_ra_info.ra_max_pages) { CERROR("%s: can't set max_readahead_per_file_mb=%lu > " "max_read_ahead_mb=%lu\n", ll_get_fsname(sb, NULL, 0), (unsigned long)pages_number >> (20 - PAGE_SHIFT), sbi->ll_ra_info.ra_max_pages >> (20 - PAGE_SHIFT)); 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 *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_read_ahead_whole_pages; spin_unlock(&sbi->ll_lock); mult = 1 << (20 - PAGE_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 __user *buffer, size_t count, loff_t *off) { struct seq_file *m = file->private_data; struct super_block *sb = m->private; struct ll_sb_info *sbi = ll_s2sbi(sb); 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; /* 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) { int pages_shift = 20 - PAGE_SHIFT; CERROR("%s: can't set max_read_ahead_whole_mb=%lu > " "max_read_ahead_per_file_mb=%lu\n", ll_get_fsname(sb, NULL, 0), (unsigned long)pages_number >> pages_shift, sbi->ll_ra_info.ra_max_pages_per_file >> pages_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_SHIFT; long max_cached_mb; long unused_mb; max_cached_mb = cache->ccc_lru_max >> shift; unused_mb = atomic_long_read(&cache->ccc_lru_left) >> shift; seq_printf(m, "users: %d\n" "max_cached_mb: %ld\n" "used_mb: %ld\n" "unused_mb: %ld\n" "reclaim_count: %u\n", atomic_read(&cache->ccc_users), max_cached_mb, max_cached_mb - unused_mb, unused_mb, cache->ccc_lru_shrinkers); return 0; } static ssize_t ll_max_cached_mb_seq_write(struct file *file, const char __user *buffer, size_t count, loff_t *off) { struct seq_file *m = file->private_data; struct super_block *sb = m->private; struct ll_sb_info *sbi = ll_s2sbi(sb); struct cl_client_cache *cache = sbi->ll_cache; struct lu_env *env; long diff = 0; long nrpages = 0; __u16 refcheck; __s64 pages_number; long rc; char kernbuf[128]; ENTRY; if (count >= sizeof(kernbuf)) RETURN(-EINVAL); if (copy_from_user(kernbuf, buffer, count)) RETURN(-EFAULT); kernbuf[count] = 0; buffer += lprocfs_find_named_value(kernbuf, "max_cached_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 || pages_number > totalram_pages) { CERROR("%s: can't set max cache more than %lu MB\n", ll_get_fsname(sb, NULL, 0), totalram_pages >> (20 - PAGE_SHIFT)); RETURN(-ERANGE); } /* Allow enough cache so clients can make well-formed RPCs */ pages_number = max_t(long, pages_number, PTLRPC_MAX_BRW_PAGES); 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_long_add(diff, &cache->ccc_lru_left); GOTO(out, rc = 0); } env = cl_env_get(&refcheck); if (IS_ERR(env)) RETURN(rc); diff = -diff; while (diff > 0) { long tmp; /* reduce LRU budget from free slots. */ do { long ov, nv; ov = atomic_long_read(&cache->ccc_lru_left); if (ov == 0) break; nv = ov > diff ? ov - diff : 0; rc = atomic_long_cmpxchg(&cache->ccc_lru_left, ov, nv); if (likely(ov == rc)) { diff -= ov - nv; nrpages += ov - nv; break; } } while (1); if (diff <= 0) break; if (sbi->ll_dt_exp == NULL) { /* being initialized */ rc = -ENODEV; break; } /* difficult - have to ask OSCs to drop LRU slots. */ tmp = diff << 1; rc = obd_set_info_async(env, sbi->ll_dt_exp, sizeof(KEY_CACHE_LRU_SHRINK), KEY_CACHE_LRU_SHRINK, sizeof(tmp), &tmp, NULL); if (rc < 0) break; } cl_env_put(env, &refcheck); out: if (rc >= 0) { spin_lock(&sbi->ll_lock); cache->ccc_lru_max = pages_number; spin_unlock(&sbi->ll_lock); rc = count; } else { atomic_long_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); seq_printf(m, "%u\n", (sbi->ll_flags & LL_SBI_CHECKSUM) ? 1 : 0); return 0; } static ssize_t ll_checksum_seq_write(struct file *file, const char __user *buffer, size_t count, loff_t *off) { struct seq_file *m = file->private_data; struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private); bool val; int tmp; int rc; if (!sbi->ll_dt_exp) /* Not set up yet */ return -EAGAIN; rc = kstrtobool_from_user(buffer, count, &val); if (rc) return rc; if (val) sbi->ll_flags |= LL_SBI_CHECKSUM; else sbi->ll_flags &= ~LL_SBI_CHECKSUM; tmp = val; rc = obd_set_info_async(NULL, sbi->ll_dt_exp, sizeof(KEY_CHECKSUM), KEY_CHECKSUM, sizeof(tmp), &tmp, NULL); if (rc) CWARN("Failed to set OSC checksum flags: %d\n", rc); return count; } LPROC_SEQ_FOPS(ll_checksum); 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) { seq_printf(m, "%d\n", ll_s2sbi(sb)->ll_stats_track_id); } else if (ll_s2sbi(sb)->ll_stats_track_type == STATS_TRACK_ALL) { seq_puts(m, "0 (all)\n"); } else { seq_puts(m, "untracked\n"); } return 0; } static int ll_wr_track_id(const char __user *buffer, unsigned long count, void *data, enum stats_track_type type) { struct super_block *sb = data; unsigned int pid; int rc; rc = kstrtouint_from_user(buffer, count, 0, &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 __user *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 __user *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 __user *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); seq_printf(m, "%u\n", sbi->ll_sa_max); return 0; } static ssize_t ll_statahead_max_seq_write(struct file *file, const char __user *buffer, size_t count, loff_t *off) { struct seq_file *m = file->private_data; struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private); unsigned int val; int rc; rc = kstrtouint_from_user(buffer, count, 0, &val); if (rc) return rc; if (val <= LL_SA_RPC_MAX) sbi->ll_sa_max = val; else CERROR("Bad statahead_max value %u. 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); seq_printf(m, "%u\n", sbi->ll_flags & LL_SBI_AGL_ENABLED ? 1 : 0); return 0; } static ssize_t ll_statahead_agl_seq_write(struct file *file, const char __user *buffer, size_t count, loff_t *off) { struct seq_file *m = file->private_data; struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private); bool val; int rc; rc = kstrtobool_from_user(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); 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)); return 0; } 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); seq_printf(m, "%u\n", (sbi->ll_flags & LL_SBI_LAZYSTATFS) ? 1 : 0); return 0; } static ssize_t ll_lazystatfs_seq_write(struct file *file, const char __user *buffer, size_t count, loff_t *off) { struct seq_file *m = file->private_data; struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private); bool val; int rc; rc = kstrtobool_from_user(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_max_easize_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; seq_printf(m, "%u\n", ealen); return 0; } LPROC_SEQ_FOPS_RO(ll_max_easize); /** * Get default_easize. * * \see client_obd::cl_default_mds_easize * * \param[in] m seq_file handle * \param[in] v unused for single entry * * \retval 0 on success * \retval negative negated errno on failure */ static int ll_default_easize_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_default_mdsize(sbi, &ealen); if (rc) return rc; seq_printf(m, "%u\n", ealen); return 0; } /** * Set default_easize. * * Range checking on the passed value is handled by * ll_set_default_mdsize(). * * \see client_obd::cl_default_mds_easize * * \param[in] file proc file * \param[in] buffer string passed from user space * \param[in] count \a buffer length * \param[in] off unused for single entry * * \retval positive \a count on success * \retval negative negated errno on failure */ static ssize_t ll_default_easize_seq_write(struct file *file, const char __user *buffer, size_t count, loff_t *unused) { struct seq_file *seq = file->private_data; struct super_block *sb = (struct super_block *)seq->private; struct ll_sb_info *sbi = ll_s2sbi(sb); unsigned int val; int rc; if (count == 0) return 0; rc = kstrtouint_from_user(buffer, count, 0, &val); if (rc) return rc; rc = ll_set_default_mdsize(sbi, val); if (rc) return rc; return count; } LPROC_SEQ_FOPS(ll_default_easize); 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 int ll_tiny_write_seq_show(struct seq_file *m, void *v) { struct super_block *sb = m->private; struct ll_sb_info *sbi = ll_s2sbi(sb); seq_printf(m, "%u\n", !!(sbi->ll_flags & LL_SBI_TINY_WRITE)); return 0; } static ssize_t ll_tiny_write_seq_write( struct file *file, const char __user *buffer, size_t count, loff_t *off) { struct seq_file *m = file->private_data; struct super_block *sb = m->private; struct ll_sb_info *sbi = ll_s2sbi(sb); bool val; int rc; rc = kstrtobool_from_user(buffer, count, &val); if (rc) return rc; spin_lock(&sbi->ll_lock); if (val) sbi->ll_flags |= LL_SBI_TINY_WRITE; else sbi->ll_flags &= ~LL_SBI_TINY_WRITE; spin_unlock(&sbi->ll_lock); return count; } LPROC_SEQ_FOPS(ll_tiny_write); static int ll_fast_read_seq_show(struct seq_file *m, void *v) { struct super_block *sb = m->private; struct ll_sb_info *sbi = ll_s2sbi(sb); seq_printf(m, "%u\n", !!(sbi->ll_flags & LL_SBI_FAST_READ)); return 0; } static ssize_t ll_fast_read_seq_write(struct file *file, const char __user *buffer, size_t count, loff_t *off) { struct seq_file *m = file->private_data; struct super_block *sb = m->private; struct ll_sb_info *sbi = ll_s2sbi(sb); bool val; int rc; rc = kstrtobool_from_user(buffer, count, &val); if (rc) return rc; spin_lock(&sbi->ll_lock); if (val) sbi->ll_flags |= LL_SBI_FAST_READ; else sbi->ll_flags &= ~LL_SBI_FAST_READ; spin_unlock(&sbi->ll_lock); return count; } LPROC_SEQ_FOPS(ll_fast_read); static int ll_pio_seq_show(struct seq_file *m, void *v) { struct super_block *sb = m->private; struct ll_sb_info *sbi = ll_s2sbi(sb); seq_printf(m, "%u\n", !!(sbi->ll_flags & LL_SBI_PIO)); return 0; } static ssize_t ll_pio_seq_write(struct file *file, const char __user *buffer, size_t count, loff_t *off) { struct seq_file *m = file->private_data; struct super_block *sb = m->private; struct ll_sb_info *sbi = ll_s2sbi(sb); bool val; int rc; rc = kstrtobool_from_user(buffer, count, &val); if (rc) return rc; spin_lock(&sbi->ll_lock); if (val) sbi->ll_flags |= LL_SBI_PIO; else sbi->ll_flags &= ~LL_SBI_PIO; spin_unlock(&sbi->ll_lock); return count; } LPROC_SEQ_FOPS(ll_pio); static int ll_unstable_stats_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; long pages; int mb; pages = atomic_long_read(&cache->ccc_unstable_nr); mb = (pages * PAGE_SIZE) >> 20; seq_printf(m, "unstable_check: %8d\n" "unstable_pages: %12ld\n" "unstable_mb: %8d\n", cache->ccc_unstable_check, pages, mb); return 0; } static ssize_t ll_unstable_stats_seq_write(struct file *file, const char __user *buffer, size_t count, loff_t *unused) { struct seq_file *seq = file->private_data; struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)seq->private); char kernbuf[128]; bool val; int rc; if (count == 0) return 0; if (count >= sizeof(kernbuf)) return -EINVAL; if (copy_from_user(kernbuf, buffer, count)) return -EFAULT; kernbuf[count] = 0; buffer += lprocfs_find_named_value(kernbuf, "unstable_check:", &count) - kernbuf; rc = kstrtobool_from_user(buffer, count, &val); if (rc < 0) return rc; /* borrow lru lock to set the value */ spin_lock(&sbi->ll_cache->ccc_lru_lock); sbi->ll_cache->ccc_unstable_check = val; spin_unlock(&sbi->ll_cache->ccc_lru_lock); return count; } LPROC_SEQ_FOPS(ll_unstable_stats); static int ll_root_squash_seq_show(struct seq_file *m, void *v) { struct super_block *sb = m->private; struct ll_sb_info *sbi = ll_s2sbi(sb); struct root_squash_info *squash = &sbi->ll_squash; seq_printf(m, "%u:%u\n", squash->rsi_uid, squash->rsi_gid); return 0; } static ssize_t ll_root_squash_seq_write(struct file *file, const char __user *buffer, size_t count, loff_t *off) { struct seq_file *m = file->private_data; struct super_block *sb = m->private; struct ll_sb_info *sbi = ll_s2sbi(sb); struct root_squash_info *squash = &sbi->ll_squash; return lprocfs_wr_root_squash(buffer, count, squash, ll_get_fsname(sb, NULL, 0)); } LPROC_SEQ_FOPS(ll_root_squash); static int ll_nosquash_nids_seq_show(struct seq_file *m, void *v) { struct super_block *sb = m->private; struct ll_sb_info *sbi = ll_s2sbi(sb); struct root_squash_info *squash = &sbi->ll_squash; int len; down_read(&squash->rsi_sem); if (!list_empty(&squash->rsi_nosquash_nids)) { len = cfs_print_nidlist(m->buf + m->count, m->size - m->count, &squash->rsi_nosquash_nids); m->count += len; seq_putc(m, '\n'); } else { seq_puts(m, "NONE\n"); } up_read(&squash->rsi_sem); return 0; } static ssize_t ll_nosquash_nids_seq_write(struct file *file, const char __user *buffer, size_t count, loff_t *off) { struct seq_file *m = file->private_data; struct super_block *sb = m->private; struct ll_sb_info *sbi = ll_s2sbi(sb); struct root_squash_info *squash = &sbi->ll_squash; int rc; rc = lprocfs_wr_nosquash_nids(buffer, count, squash, ll_get_fsname(sb, NULL, 0)); if (rc < 0) return rc; ll_compute_rootsquash_state(sbi); return rc; } LPROC_SEQ_FOPS(ll_nosquash_nids); struct lprocfs_vars lprocfs_llite_obd_vars[] = { { .name = "uuid", .fops = &ll_sb_uuid_fops }, { .name = "fstype", .fops = &ll_fstype_fops }, { .name = "site", .fops = &ll_site_stats_fops }, { .name = "blocksize", .fops = &ll_blksize_fops }, { .name = "stat_blocksize", .fops = &ll_stat_blksize_fops }, { .name = "kbytestotal", .fops = &ll_kbytestotal_fops }, { .name = "kbytesfree", .fops = &ll_kbytesfree_fops }, { .name = "kbytesavail", .fops = &ll_kbytesavail_fops }, { .name = "filestotal", .fops = &ll_filestotal_fops }, { .name = "filesfree", .fops = &ll_filesfree_fops }, { .name = "client_type", .fops = &ll_client_type_fops }, { .name = "max_read_ahead_mb", .fops = &ll_max_readahead_mb_fops }, { .name = "max_read_ahead_per_file_mb", .fops = &ll_max_readahead_per_file_mb_fops }, { .name = "max_read_ahead_whole_mb", .fops = &ll_max_read_ahead_whole_mb_fops }, { .name = "max_cached_mb", .fops = &ll_max_cached_mb_fops }, { .name = "checksum_pages", .fops = &ll_checksum_fops }, { .name = "stats_track_pid", .fops = &ll_track_pid_fops }, { .name = "stats_track_ppid", .fops = &ll_track_ppid_fops }, { .name = "stats_track_gid", .fops = &ll_track_gid_fops }, { .name = "statahead_max", .fops = &ll_statahead_max_fops }, { .name = "statahead_agl", .fops = &ll_statahead_agl_fops }, { .name = "statahead_stats", .fops = &ll_statahead_stats_fops }, { .name = "lazystatfs", .fops = &ll_lazystatfs_fops }, { .name = "max_easize", .fops = &ll_max_easize_fops }, { .name = "default_easize", .fops = &ll_default_easize_fops }, { .name = "sbi_flags", .fops = &ll_sbi_flags_fops }, { .name = "xattr_cache", .fops = &ll_xattr_cache_fops }, { .name = "unstable_stats", .fops = &ll_unstable_stats_fops }, { .name = "root_squash", .fops = &ll_root_squash_fops }, { .name = "nosquash_nids", .fops = &ll_nosquash_nids_fops }, { .name = "fast_read", .fops = &ll_fast_read_fops, }, { .name = "pio", .fops = &ll_pio_fops, }, { .name = "tiny_write", .fops = &ll_tiny_write_fops, }, { NULL } }; #define MAX_STRING_SIZE 128 static const 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_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_FAULT, LPROCFS_TYPE_REGS, "page_fault" }, { LPROC_LL_MKWRITE, LPROCFS_TYPE_REGS, "page_mkwrite" }, { 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_GETXATTR_HITS, LPROCFS_TYPE_REGS, "getxattr_hits" }, { 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 == from_kgid(&init_user_ns, 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", [RA_STAT_FAILED_REACH_END] = "failed to reach end" }; LPROC_SEQ_FOPS_RO_TYPE(llite, name); LPROC_SEQ_FOPS_RO_TYPE(llite, uuid); int lprocfs_ll_register_mountpoint(struct proc_dir_entry *parent, struct super_block *sb) { struct lprocfs_vars lvars[2]; struct lustre_sb_info *lsi = s2lsi(sb); struct ll_sb_info *sbi = ll_s2sbi(sb); 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); /* 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); out: if (err) { lprocfs_remove(&sbi->ll_proc_root); lprocfs_free_stats(&sbi->ll_ra_stats); lprocfs_free_stats(&sbi->ll_stats); } RETURN(err); } int lprocfs_ll_register_obd(struct super_block *sb, const char *obdname) { struct lprocfs_vars lvars[2]; struct ll_sb_info *sbi = ll_s2sbi(sb); struct obd_device *obd; struct proc_dir_entry *dir; char name[MAX_STRING_SIZE + 1]; int err; ENTRY; memset(lvars, 0, sizeof(lvars)); name[MAX_STRING_SIZE] = '\0'; lvars[0].name = name; LASSERT(sbi != NULL); LASSERT(obdname != NULL); obd = class_name2obd(obdname); 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); 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_ll_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 timespec64 now; struct ll_sb_info *sbi = seq->private; struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info; int k; ktime_get_real_ts64(&now); if (!sbi->ll_rw_stats_on) { seq_puts(seq, "disabled\n write anything to this file to activate, then '0' or 'disable' to deactivate\n"); return 0; } seq_printf(seq, "snapshot_time: %llu.%09lu (secs.nsecs)\n", (s64)now.tv_sec, now.tv_nsec); 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 __user *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; __s64 value; if (len == 0) return -EINVAL; value = ll_stats_pid_write(buf, len); 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 timespec64 now; struct ll_sb_info *sbi = seq->private; struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info; ktime_get_real_ts64(&now); if (!sbi->ll_rw_stats_on) { seq_puts(seq, "disabled\n write anything to this file to activate, then '0' or 'disable' to deactivate\n"); return 0; } seq_printf(seq, "snapshot_time: %llu.%09lu (secs.nsecs)\n", (s64)now.tv_sec, now.tv_nsec); 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 __user *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; __s64 value; if (len == 0) return -EINVAL; value = ll_stats_pid_write(buf, len); 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 timespec64 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; ktime_get_real_ts64(&now); if (!sbi->ll_rw_stats_on) { seq_puts(seq, "disabled\n write anything to this file to activate, then '0' or 'disable' to deactivate\n"); return 0; } spin_lock(&sbi->ll_process_lock); seq_printf(seq, "snapshot_time: %llu.%09lu (secs.nsecs)\n", (s64)now.tv_sec, now.tv_nsec); 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 == READ ? 'R' : 'W', 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 == READ ? 'R' : 'W', 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 __user *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; __s64 value; if (len == 0) return -EINVAL; value = ll_stats_pid_write(buf, len); 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; } /** * ll_stats_pid_write() - Determine if stats collection should be enabled * @buf: Buffer containing the data written * @len: Number of bytes in the buffer * * Several proc files begin collecting stats when a value is written, and stop * collecting when either '0' or 'disable' is written. This function checks the * written value to see if collection should be enabled or disabled. * * Return: If '0' or 'disable' is provided, 0 is returned. If the text * equivalent of a number is written, that number is returned. Otherwise, * 1 is returned. Non-zero return values indicate collection should be enabled. */ static __s64 ll_stats_pid_write(const char __user *buf, size_t len) { unsigned long long value = 1; int rc; char kernbuf[16]; rc = kstrtoull_from_user(buf, len, 0, &value); if (rc < 0 && len < sizeof(kernbuf)) { if (copy_from_user(kernbuf, buf, len)) return -EFAULT; kernbuf[len] = 0; if (kernbuf[len - 1] == '\n') kernbuf[len - 1] = 0; if (strncasecmp(kernbuf, "disable", 7) == 0) value = 0; } return value; } LPROC_SEQ_FOPS(ll_rw_offset_stats); #endif /* CONFIG_PROC_FS */