X-Git-Url: https://git.whamcloud.com/?p=fs%2Flustre-release.git;a=blobdiff_plain;f=lustre%2Fllite%2Flproc_llite.c;h=66d0f11e61996b22927fbf8630373dd14d322d0e;hp=c716538ccc69629141aeb6c5c4d4a44363ab338e;hb=e31285e62f146398c18e419290ecf0cc1b932616;hpb=69ddb2e08ecb0226ae820b69932ec4eb424f481a diff --git a/lustre/llite/lproc_llite.c b/lustre/llite/lproc_llite.c index c716538..66d0f11 100644 --- a/lustre/llite/lproc_llite.c +++ b/lustre/llite/lproc_llite.c @@ -15,11 +15,7 @@ * * 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. + * http://www.gnu.org/licenses/gpl-2.0.html * * GPL HEADER END */ @@ -27,7 +23,7 @@ * Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved. * Use is subject to license terms. * - * Copyright (c) 2012, 2013, Intel Corporation. + * Copyright (c) 2012, 2017, Intel Corporation. */ /* * This file is part of Lustre, http://www.lustre.org/ @@ -36,197 +32,259 @@ #define DEBUG_SUBSYSTEM S_LLITE #include -#include -#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; +static struct kobject *llite_kobj; + +int llite_tunables_register(void) +{ + int rc = 0; + + proc_lustre_fs_root = lprocfs_register("llite", proc_lustre_root, + NULL, NULL); + if (IS_ERR(proc_lustre_fs_root)) { + rc = PTR_ERR(proc_lustre_fs_root); + CERROR("cannot register '/proc/fs/lustre/llite': rc = %d\n", + rc); + proc_lustre_fs_root = NULL; + return rc; + } + + llite_kobj = class_setup_tunables("llite"); + if (IS_ERR(llite_kobj)) { + rc = PTR_ERR(llite_kobj); + llite_kobj = NULL; + } + + return rc; +} + +void llite_tunables_unregister(void) +{ + if (llite_kobj) + kobject_put(llite_kobj); + + lprocfs_remove(&proc_lustre_fs_root); +} -#ifdef LPROCFS +#ifdef CONFIG_PROC_FS /* /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 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) +static ssize_t blocksize_show(struct kobject *kobj, struct attribute *attr, + char *buf) { - struct super_block *sb = m->private; + struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info, + ll_kset.kobj); 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; + rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY); + if (rc) + return rc; + + return sprintf(buf, "%u\n", osfs.os_bsize); } -LPROC_SEQ_FOPS_RO(ll_blksize); +LUSTRE_RO_ATTR(blocksize); -static int ll_kbytestotal_seq_show(struct seq_file *m, void *v) +static int ll_stat_blksize_seq_show(struct seq_file *m, void *v) { - struct super_block *sb = m->private; - struct obd_statfs osfs; + 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; - 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; + rc = kstrtouint_from_user(buffer, count, 0, &val); + if (rc) + return rc; - while (blk_size >>= 1) - result <<= 1; + if (val != 0 && (val < PAGE_SIZE || (val & (val - 1))) != 0) + return -ERANGE; - rc = seq_printf(m, LPU64"\n", result); - } - return rc; + sbi->ll_stat_blksize = val; + + return count; } -LPROC_SEQ_FOPS_RO(ll_kbytestotal); +LPROC_SEQ_FOPS(ll_stat_blksize); -static int ll_kbytesfree_seq_show(struct seq_file *m, void *v) +static ssize_t kbytestotal_show(struct kobject *kobj, struct attribute *attr, + char *buf) { - struct super_block *sb = m->private; + struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info, + ll_kset.kobj); struct obd_statfs osfs; + u32 blk_size; + u64 result; 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; + rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY); + if (rc) + return rc; + + blk_size = osfs.os_bsize >> 10; + result = osfs.os_blocks; - while (blk_size >>= 1) - result <<= 1; + while (blk_size >>= 1) + result <<= 1; - rc = seq_printf(m, LPU64"\n", result); - } - return rc; + return sprintf(buf, "%llu\n", result); } -LPROC_SEQ_FOPS_RO(ll_kbytesfree); +LUSTRE_RO_ATTR(kbytestotal); -static int ll_kbytesavail_seq_show(struct seq_file *m, void *v) +static ssize_t kbytesfree_show(struct kobject *kobj, struct attribute *attr, + char *buf) { - struct super_block *sb = m->private; + struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info, + ll_kset.kobj); struct obd_statfs osfs; + u32 blk_size; + u64 result; 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; + rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY); + if (rc) + return rc; - while (blk_size >>= 1) - result <<= 1; + blk_size = osfs.os_bsize >> 10; + result = osfs.os_bfree; - rc = seq_printf(m, LPU64"\n", result); - } - return rc; + while (blk_size >>= 1) + result <<= 1; + + return sprintf(buf, "%llu\n", result); } -LPROC_SEQ_FOPS_RO(ll_kbytesavail); +LUSTRE_RO_ATTR(kbytesfree); -static int ll_filestotal_seq_show(struct seq_file *m, void *v) +static ssize_t kbytesavail_show(struct kobject *kobj, struct attribute *attr, + char *buf) { - struct super_block *sb = m->private; + struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info, + ll_kset.kobj); struct obd_statfs osfs; + u32 blk_size; + u64 result; 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; + rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY); + if (rc) + return rc; + + blk_size = osfs.os_bsize >> 10; + result = osfs.os_bavail; + + while (blk_size >>= 1) + result <<= 1; + + return sprintf(buf, "%llu\n", result); } -LPROC_SEQ_FOPS_RO(ll_filestotal); +LUSTRE_RO_ATTR(kbytesavail); -static int ll_filesfree_seq_show(struct seq_file *m, void *v) +static ssize_t filestotal_show(struct kobject *kobj, struct attribute *attr, + char *buf) { - struct super_block *sb = m->private; + struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info, + ll_kset.kobj); 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; + rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY); + if (rc) + return rc; + + return sprintf(buf, "%llu\n", osfs.os_files); } -LPROC_SEQ_FOPS_RO(ll_filesfree); +LUSTRE_RO_ATTR(filestotal); -static int ll_client_type_seq_show(struct seq_file *m, void *v) +static ssize_t filesfree_show(struct kobject *kobj, struct attribute *attr, + char *buf) { - struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private); + struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info, + ll_kset.kobj); + struct obd_statfs osfs; int rc; - LASSERT(sbi != NULL); + rc = ll_statfs_internal(sbi, &osfs, OBD_STATFS_NODELAY); + if (rc) + return rc; - 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; + return sprintf(buf, "%llu\n", osfs.os_ffree); } -LPROC_SEQ_FOPS_RO(ll_client_type); +LUSTRE_RO_ATTR(filesfree); -static int ll_fstype_seq_show(struct seq_file *m, void *v) +static ssize_t client_type_show(struct kobject *kobj, struct attribute *attr, + char *buf) { - struct super_block *sb = m->private; + return sprintf(buf, "local client\n"); +} +LUSTRE_RO_ATTR(client_type); - LASSERT(sb != NULL); - return seq_printf(m, "%s\n", sb->s_type->name); +static ssize_t fstype_show(struct kobject *kobj, struct attribute *attr, + char *buf) +{ + return sprintf(buf, "lustre\n"); } -LPROC_SEQ_FOPS_RO(ll_fstype); +LUSTRE_RO_ATTR(fstype); -static int ll_sb_uuid_seq_show(struct seq_file *m, void *v) +static ssize_t uuid_show(struct kobject *kobj, struct attribute *attr, + char *buf) { - struct super_block *sb = m->private; + struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info, + ll_kset.kobj); - LASSERT(sb != NULL); - return seq_printf(m, "%s\n", ll_s2sbi(sb)->ll_sb_uuid.uuid); + return sprintf(buf, "%s\n", sbi->ll_sb_uuid.uuid); } -LPROC_SEQ_FOPS_RO(ll_sb_uuid); +LUSTRE_RO_ATTR(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); - return seq_printf(m, "%u\n", sbi->ll_xattr_cache_enabled); + 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 *buffer, +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); - int val, rc; + bool val; + int rc; - rc = lprocfs_write_helper(buffer, count, &val); + rc = kstrtobool_from_user(buffer, count, &val); if (rc) return rc; - if (val != 0 && val != 1) - return -ERANGE; - - if (val == 1 && !(sbi->ll_flags & LL_SBI_XATTR_CACHE)) + 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; } @@ -255,27 +313,32 @@ static int ll_max_readahead_mb_seq_show(struct seq_file *m, void *v) pages_number = sbi->ll_ra_info.ra_max_pages; spin_unlock(&sbi->ll_lock); - mult = 1 << (20 - PAGE_CACHE_SHIFT); + 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 *buffer, +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 ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private); - int mult, rc, pages_number; + struct super_block *sb = m->private; + struct ll_sb_info *sbi = ll_s2sbi(sb); + __s64 pages_number; + int rc; - mult = 1 << (20 - PAGE_CACHE_SHIFT); - rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult); + 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("can't set file readahead more than %lu MB\n", - totalram_pages >> (20 - PAGE_CACHE_SHIFT + 1)); + 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; } @@ -297,28 +360,32 @@ static int ll_max_readahead_per_file_mb_seq_show(struct seq_file *m, void *v) pages_number = sbi->ll_ra_info.ra_max_pages_per_file; spin_unlock(&sbi->ll_lock); - mult = 1 << (20 - PAGE_CACHE_SHIFT); + 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 *buffer, +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 ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private); - int mult, rc, pages_number; + struct super_block *sb = m->private; + struct ll_sb_info *sbi = ll_s2sbi(sb); + int rc; + __s64 pages_number; - mult = 1 << (20 - PAGE_CACHE_SHIFT); - rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult); + rc = lprocfs_str_with_units_to_s64(buffer, count, &pages_number, 'M'); 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); + 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; } @@ -340,31 +407,37 @@ static int ll_max_read_ahead_whole_mb_seq_show(struct seq_file *m, void *v) pages_number = sbi->ll_ra_info.ra_max_read_ahead_whole_pages; spin_unlock(&sbi->ll_lock); - mult = 1 << (20 - PAGE_CACHE_SHIFT); + 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 *buffer, +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 ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private); - int mult, rc, pages_number; + struct super_block *sb = m->private; + struct ll_sb_info *sbi = ll_s2sbi(sb); + int rc; + __s64 pages_number; - mult = 1 << (20 - PAGE_CACHE_SHIFT); - rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult); + 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) { - 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)); + 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; } @@ -379,56 +452,66 @@ 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; + 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_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); + 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 *buffer, +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 cl_client_cache *cache = sbi->ll_cache; struct lu_env *env; - int refcheck; - int mult, rc, pages_number; - int diff = 0; - int nrpages = 0; + long diff = 0; + long nrpages = 0; + __u16 refcheck; + __s64 pages_number; + long rc; + char kernbuf[128]; 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 (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_CACHE_SHIFT)); + totalram_pages >> (20 - PAGE_SHIFT)); RETURN(-ERANGE); } - - if (sbi->ll_dt_exp == NULL) /* being initialized */ - GOTO(out, rc = 0); + /* 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; @@ -436,7 +519,7 @@ ll_max_cached_mb_seq_write(struct file *file, const char *buffer, /* easy - add more LRU slots. */ if (diff >= 0) { - atomic_add(diff, &cache->ccc_lru_left); + atomic_long_add(diff, &cache->ccc_lru_left); GOTO(out, rc = 0); } @@ -446,18 +529,18 @@ ll_max_cached_mb_seq_write(struct file *file, const char *buffer, diff = -diff; while (diff > 0) { - int tmp; + long tmp; /* reduce LRU budget from free slots. */ do { - int ov, nv; + long ov, nv; - ov = atomic_read(&cache->ccc_lru_left); + ov = atomic_long_read(&cache->ccc_lru_left); if (ov == 0) break; nv = ov > diff ? ov - diff : 0; - rc = atomic_cmpxchg(&cache->ccc_lru_left, ov, nv); + rc = atomic_long_cmpxchg(&cache->ccc_lru_left, ov, nv); if (likely(ov == rc)) { diff -= ov - nv; nrpages += ov - nv; @@ -468,6 +551,11 @@ ll_max_cached_mb_seq_write(struct file *file, const char *buffer, 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, @@ -486,100 +574,87 @@ out: spin_unlock(&sbi->ll_lock); rc = count; } else { - atomic_add(nrpages, &cache->ccc_lru_left); + 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) +static ssize_t checksum_pages_show(struct kobject *kobj, struct attribute *attr, + char *buf) { - struct super_block *sb = m->private; - struct ll_sb_info *sbi = ll_s2sbi(sb); + struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info, + ll_kset.kobj); - return seq_printf(m, "%u\n", (sbi->ll_flags & LL_SBI_CHECKSUM) ? 1 : 0); + return sprintf(buf, "%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) +static ssize_t checksum_pages_store(struct kobject *kobj, + struct attribute *attr, + const char *buffer, + size_t count) { - struct seq_file *m = file->private_data; - struct ll_sb_info *sbi = ll_s2sbi((struct super_block *)m->private); - 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); + struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info, + ll_kset.kobj); + bool val; + int tmp; + int rc; - return count; -} -LPROC_SEQ_FOPS(ll_checksum); + if (!sbi->ll_dt_exp) + /* Not set up yet */ + return -EAGAIN; -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); -} + rc = kstrtobool(buffer, &val); + if (rc) + return rc; + if (val) + sbi->ll_flags |= LL_SBI_CHECKSUM; + else + sbi->ll_flags &= ~LL_SBI_CHECKSUM; + tmp = val; -static ssize_t ll_max_rw_chunk_seq_write(struct file *file, const char *buffer, - size_t count, loff_t *off) -{ - struct seq_file *m = file->private_data; - struct super_block *sb = m->private; - int rc, 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); - rc = lprocfs_write_helper(buffer, count, &val); - if (rc) - return rc; - ll_s2sbi(sb)->ll_max_rw_chunk = val; - return count; + return count; } -LPROC_SEQ_FOPS(ll_max_rw_chunk); +LUSTRE_RW_ATTR(checksum_pages); 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); + 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"); + seq_puts(m, "0 (all)\n"); } else { - return seq_printf(m, "untracked\n"); + seq_puts(m, "untracked\n"); } + return 0; } -static int ll_wr_track_id(const char *buffer, unsigned long count, void *data, - enum stats_track_type type) +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; - int rc, pid; + unsigned int pid; + int rc; + + rc = kstrtouint_from_user(buffer, count, 0, &pid); + if (rc) + return rc; - 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; + 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) @@ -587,7 +662,8 @@ 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, +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; @@ -600,7 +676,8 @@ 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, +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; @@ -613,7 +690,8 @@ 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, +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; @@ -621,32 +699,71 @@ static ssize_t ll_track_gid_seq_write(struct file *file, const char *buffer, } LPROC_SEQ_FOPS(ll_track_gid); +static ssize_t statahead_running_max_show(struct kobject *kobj, + struct attribute *attr, + char *buf) +{ + struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info, + ll_kset.kobj); + + return snprintf(buf, 16, "%u\n", sbi->ll_sa_running_max); +} + +static ssize_t statahead_running_max_store(struct kobject *kobj, + struct attribute *attr, + const char *buffer, + size_t count) +{ + struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info, + ll_kset.kobj); + unsigned long val; + int rc; + + rc = kstrtoul(buffer, 0, &val); + if (rc) + return rc; + + if (val <= LL_SA_RUNNING_MAX) { + sbi->ll_sa_running_max = val; + return count; + } + + CERROR("Bad statahead_running_max value %lu. Valid values " + "are in the range [0, %d]\n", val, LL_SA_RUNNING_MAX); + + return -ERANGE; +} +LUSTRE_RW_ATTR(statahead_running_max); + 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); + seq_printf(m, "%u\n", sbi->ll_sa_max); + return 0; } -static ssize_t ll_statahead_max_seq_write(struct file *file, const char *buffer, +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); - int val, rc; + unsigned int val; + int rc; - rc = lprocfs_write_helper(buffer, count, &val); - if (rc) - return rc; + rc = kstrtouint_from_user(buffer, count, 0, &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); + 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; + return count; } LPROC_SEQ_FOPS(ll_statahead_max); @@ -655,27 +772,30 @@ 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); + 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 *buffer, +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); - int val, rc; + bool val; + int rc; - rc = lprocfs_write_helper(buffer, count, &val); - if (rc) - return 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; + if (val) + sbi->ll_flags |= LL_SBI_AGL_ENABLED; + else + sbi->ll_flags &= ~LL_SBI_AGL_ENABLED; - return count; + return count; } LPROC_SEQ_FOPS(ll_statahead_agl); @@ -684,13 +804,13 @@ 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)); + 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); @@ -699,27 +819,30 @@ 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); + 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 *buffer, +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); - int val, rc; + bool val; + int rc; - rc = lprocfs_write_helper(buffer, count, &val); - if (rc) - return 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; + if (val) + sbi->ll_flags |= LL_SBI_LAZYSTATFS; + else + sbi->ll_flags &= ~LL_SBI_LAZYSTATFS; - return count; + return count; } LPROC_SEQ_FOPS(ll_lazystatfs); @@ -734,11 +857,23 @@ static int ll_max_easize_seq_show(struct seq_file *m, void *v) if (rc) return rc; - return seq_printf(m, "%u\n", ealen); + seq_printf(m, "%u\n", ealen); + return 0; } LPROC_SEQ_FOPS_RO(ll_max_easize); -static int ll_defult_easize_seq_show(struct seq_file *m, void *v) +/** + * 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); @@ -749,39 +884,50 @@ static int ll_defult_easize_seq_show(struct seq_file *m, void *v) if (rc) return rc; - return seq_printf(m, "%u\n", ealen); + seq_printf(m, "%u\n", ealen); + return 0; } -LPROC_SEQ_FOPS_RO(ll_defult_easize); -static int ll_max_cookiesize_seq_show(struct seq_file *m, void *v) +/** + * 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 super_block *sb = m->private; + 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 cookielen; + unsigned int val; int rc; - rc = ll_get_max_cookiesize(sbi, &cookielen); + if (count == 0) + return 0; + + rc = kstrtouint_from_user(buffer, count, 0, &val); if (rc) return rc; - return seq_printf(m, "%u\n", cookielen); -} -LPROC_SEQ_FOPS_RO(ll_max_cookiesize); - -static int ll_defult_cookiesize_seq_show(struct seq_file *m, void *v) -{ - struct super_block *sb = m->private; - struct ll_sb_info *sbi = ll_s2sbi(sb); - unsigned int cookielen; - int rc; - - rc = ll_get_default_cookiesize(sbi, &cookielen); + rc = ll_set_default_mdsize(sbi, val); if (rc) return rc; - return seq_printf(m, "%u\n", cookielen); + return count; } -LPROC_SEQ_FOPS_RO(ll_defult_cookiesize); +LPROC_SEQ_FOPS(ll_default_easize); static int ll_sbi_flags_seq_show(struct seq_file *m, void *v) { @@ -807,42 +953,229 @@ static int ll_sbi_flags_seq_show(struct seq_file *m, void *v) } 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; - int pages, mb; + struct cl_client_cache *cache = sbi->ll_cache; + long pages; + int mb; - pages = atomic_read(&cache->ccc_unstable_nr); - mb = (pages * PAGE_CACHE_SIZE) >> 20; + pages = atomic_long_read(&cache->ccc_unstable_nr); + mb = (pages * PAGE_SIZE) >> 20; - return seq_printf(m, "unstable_pages: %8d\n" - "unstable_mb: %8d\n", pages, mb); + seq_printf(m, "unstable_check: %8d\n" + "unstable_pages: %12ld\n" + "unstable_mb: %8d\n", + cache->ccc_unstable_check, pages, mb); + return 0; } -LPROC_SEQ_FOPS_RO(ll_unstable_stats); -struct lprocfs_seq_vars lprocfs_llite_obd_vars[] = { - { .name = "uuid", - .fops = &ll_sb_uuid_fops }, - { .name = "fstype", - .fops = &ll_fstype_fops }, +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 = "site", .fops = &ll_site_stats_fops }, - { .name = "blocksize", - .fops = &ll_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 = "stat_blocksize", + .fops = &ll_stat_blksize_fops }, { .name = "max_read_ahead_mb", .fops = &ll_max_readahead_mb_fops }, { .name = "max_read_ahead_per_file_mb", @@ -851,10 +1184,6 @@ struct lprocfs_seq_vars lprocfs_llite_obd_vars[] = { .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 = "max_rw_chunk", - .fops = &ll_max_rw_chunk_fops }, { .name = "stats_track_pid", .fops = &ll_track_pid_fops }, { .name = "stats_track_ppid", @@ -868,27 +1197,61 @@ struct lprocfs_seq_vars lprocfs_llite_obd_vars[] = { { .name = "statahead_stats", .fops = &ll_statahead_stats_fops }, { .name = "lazystatfs", - .fops = &ll_lazystatfs_fops }, + .fops = &ll_lazystatfs_fops }, { .name = "max_easize", - .fops = &ll_max_easize_fops }, + .fops = &ll_max_easize_fops }, { .name = "default_easize", - .fops = &ll_defult_easize_fops }, - { .name = "max_cookiesize", - .fops = &ll_max_cookiesize_fops }, - { .name = "default_cookiesize", - .fops = &ll_defult_cookiesize_fops }, + .fops = &ll_default_easize_fops }, { .name = "sbi_flags", - .fops = &ll_sbi_flags_fops }, + .fops = &ll_sbi_flags_fops }, { .name = "xattr_cache", .fops = &ll_xattr_cache_fops }, { .name = "unstable_stats", .fops = &ll_unstable_stats_fops }, - { 0 } + { .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 -struct llite_file_opcode { +static struct attribute *llite_attrs[] = { + &lustre_attr_blocksize.attr, + &lustre_attr_kbytestotal.attr, + &lustre_attr_kbytesfree.attr, + &lustre_attr_kbytesavail.attr, + &lustre_attr_filestotal.attr, + &lustre_attr_filesfree.attr, + &lustre_attr_client_type.attr, + &lustre_attr_fstype.attr, + &lustre_attr_uuid.attr, + &lustre_attr_checksum_pages.attr, + &lustre_attr_statahead_running_max.attr, + NULL, +}; + +static void llite_kobj_release(struct kobject *kobj) +{ + struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info, + ll_kset.kobj); + complete(&sbi->ll_kobj_unregister); +} + +static struct kobj_type llite_ktype = { + .default_attrs = llite_attrs, + .sysfs_ops = &lustre_sysfs_ops, + .release = llite_kobj_release, +}; + +static const struct llite_file_opcode { __u32 opcode; __u32 type; const char *opname; @@ -904,14 +1267,12 @@ struct llite_file_opcode { "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_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" }, @@ -978,38 +1339,21 @@ static const char *ra_stat_string[] = { 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) +int ll_debugfs_register_super(struct super_block *sb, const char *name) { - struct lprocfs_seq_vars lvars[2]; struct lustre_sb_info *lsi = s2lsi(sb); struct ll_sb_info *sbi = ll_s2sbi(sb); - struct obd_device *obd; - struct proc_dir_entry *dir; - char name[MAX_STRING_SIZE + 1], *ptr; - int err, id, len, rc; - ENTRY; + struct lprocfs_vars lvars[2]; + int err, id, 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_seq_register(name, parent, NULL, NULL); + sbi->ll_proc_root = lprocfs_register(name, proc_lustre_fs_root, + NULL, NULL); if (IS_ERR(sbi->ll_proc_root)) { err = PTR_ERR(sbi->ll_proc_root); sbi->ll_proc_root = NULL; @@ -1021,88 +1365,108 @@ int lprocfs_register_mountpoint(struct proc_dir_entry *parent, 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); + 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"); - 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); + 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"); - 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); + 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_proc, 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_stats, 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_stats, 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_ra_stats, err); - err = lprocfs_seq_add_vars(sbi->ll_proc_root, lprocfs_llite_obd_vars, sb); + err = lprocfs_add_vars(sbi->ll_proc_root, lprocfs_llite_obd_vars, sb); if (err) - GOTO(out, err); + GOTO(out_ra_stats, err); - /* MDC info */ - obd = class_name2obd(mdc); + /* Yes we also register sysfs mount kset here as well */ + sbi->ll_kset.kobj.parent = llite_kobj; + sbi->ll_kset.kobj.ktype = &llite_ktype; + init_completion(&sbi->ll_kobj_unregister); + err = kobject_set_name(&sbi->ll_kset.kobj, "%s", name); + if (err) + GOTO(out_ra_stats, err); - LASSERT(obd != NULL); - LASSERT(obd->obd_magic == OBD_DEVICE_MAGIC); - LASSERT(obd->obd_type->typ_name != NULL); + err = kset_register(&sbi->ll_kset); + if (err) + GOTO(out_ra_stats, err); - dir = proc_mkdir(obd->obd_type->typ_name, sbi->ll_proc_root); - if (dir == NULL) - GOTO(out, err = -ENOMEM); + lsi->lsi_kobj = kobject_get(&sbi->ll_kset.kobj); - snprintf(name, MAX_STRING_SIZE, "common_name"); - lvars[0].fops = &llite_name_fops; - err = lprocfs_seq_add_vars(dir, lvars, obd); - if (err) - GOTO(out, err); + RETURN(0); +out_ra_stats: + lprocfs_free_stats(&sbi->ll_ra_stats); +out_stats: + lprocfs_free_stats(&sbi->ll_stats); +out_proc: + lprocfs_remove(&sbi->ll_proc_root); - snprintf(name, MAX_STRING_SIZE, "uuid"); - lvars[0].fops = &llite_uuid_fops; - err = lprocfs_seq_add_vars(dir, lvars, obd); - if (err) - GOTO(out, err); + 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; - /* OSC */ - obd = class_name2obd(osc); + 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); @@ -1114,13 +1478,16 @@ int lprocfs_register_mountpoint(struct proc_dir_entry *parent, snprintf(name, MAX_STRING_SIZE, "common_name"); lvars[0].fops = &llite_name_fops; - err = lprocfs_seq_add_vars(dir, lvars, obd); + 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_seq_add_vars(dir, lvars, obd); + err = lprocfs_add_vars(dir, lvars, obd); + if (err) + GOTO(out, err); + out: if (err) { lprocfs_remove(&sbi->ll_proc_root); @@ -1130,8 +1497,16 @@ out: RETURN(err); } -void lprocfs_unregister_mountpoint(struct ll_sb_info *sbi) +void ll_debugfs_unregister_super(struct super_block *sb) { + struct lustre_sb_info *lsi = s2lsi(sb); + struct ll_sb_info *sbi = ll_s2sbi(sb); + + kobject_put(lsi->lsi_kobj); + + kset_unregister(&sbi->ll_kset); + wait_for_completion(&sbi->ll_kobj_unregister); + if (sbi->ll_proc_root) { lprocfs_remove(&sbi->ll_proc_root); lprocfs_free_stats(&sbi->ll_ra_stats); @@ -1184,21 +1559,19 @@ static void ll_display_extents_info(struct ll_rw_extents_info *io_extents, 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; + struct timespec64 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); + ktime_get_real_ts64(&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_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%", @@ -1216,24 +1589,25 @@ static int ll_rw_extents_stats_pp_seq_show(struct seq_file *seq, void *v) } static ssize_t ll_rw_extents_stats_pp_seq_write(struct file *file, - const char *buf, size_t len, - loff_t *off) + 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; - int value = 1, rc = 0; + 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; - rc = lprocfs_write_helper(buf, len, &value); - if (rc < 0 && (strcmp(buf, "disabled") == 0 || - strcmp(buf, "Disabled") == 0)) - value = 0; + value = ll_stats_pid_write(buf, len); - if (value == 0) - sbi->ll_rw_stats_on = 0; - else - sbi->ll_rw_stats_on = 1; + 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++) { @@ -1249,25 +1623,23 @@ 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 timespec64 now; struct ll_sb_info *sbi = seq->private; struct ll_rw_extents_info *io_extents = &sbi->ll_rw_extents_info; - do_gettimeofday(&now); + ktime_get_real_ts64(&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_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%"); + 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); @@ -1275,24 +1647,26 @@ static int ll_rw_extents_stats_seq_show(struct seq_file *seq, void *v) return 0; } -static ssize_t ll_rw_extents_stats_seq_write(struct file *file, const char *buf, - size_t len, loff_t *off) +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; - 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; + 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; @@ -1303,7 +1677,6 @@ static ssize_t ll_rw_extents_stats_seq_write(struct file *file, const char *buf, return len; } - LPROC_SEQ_FOPS(ll_rw_extents_stats); void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid, @@ -1411,33 +1784,31 @@ void ll_rw_stats_tally(struct ll_sb_info *sbi, pid_t pid, 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; + 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; - do_gettimeofday(&now); + ktime_get_real_ts64(&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_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: %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"); + 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", + "%3c %10d %14llu %14llu %17lu %17lu %14llu\n", offset[i].rw_op == READ ? 'R' : 'W', offset[i].rw_pid, offset[i].rw_range_start, @@ -1451,7 +1822,7 @@ static int ll_rw_offset_stats_seq_show(struct seq_file *seq, void *v) 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", + "%3c %10d %14llu %14llu %17lu %17lu %14llu\n", process[i].rw_op == READ ? 'R' : 'W', process[i].rw_pid, process[i].rw_range_start, @@ -1465,25 +1836,25 @@ static int ll_rw_offset_stats_seq_show(struct seq_file *seq, void *v) return 0; } -static ssize_t ll_rw_offset_stats_seq_write(struct file *file, const char *buf, - size_t len, loff_t *off) +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; - int value = 1, rc = 0; + 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; - rc = lprocfs_write_helper(buf, len, &value); + if (len == 0) + return -EINVAL; - if (rc < 0 && (strcmp(buf, "disabled") == 0 || - strcmp(buf, "Disabled") == 0)) - value = 0; + value = ll_stats_pid_write(buf, len); - if (value == 0) - sbi->ll_rw_stats_on = 0; - else - sbi->ll_rw_stats_on = 1; + 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; @@ -1497,5 +1868,41 @@ static ssize_t ll_rw_offset_stats_seq_write(struct file *file, const char *buf, 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 /* LPROCFS */ +#endif /* CONFIG_PROC_FS */