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Commit e1a1df5e authored by Oleg Drokin's avatar Oleg Drokin Committed by Greg Kroah-Hartman
Browse files

staging/lustre/llite: move /proc/fs/lustre/llite/max_read_ahead_mb to sysfs 



Move max_read_ahead_mb file from /proc/fs/lustre/llite/*
to /sys/fs/lustre/llite/*/

Signed-off-by: default avatarOleg Drokin <green@linuxhacker.ru>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent ec55a629

drivers/staging/lustre/lustre/llite/lproc_llite.c

+20 −15
Original line number Diff line number Diff line
@@ -220,10 +220,11 @@ static int ll_site_stats_seq_show(struct seq_file *m, void *v) 
}

LPROC_SEQ_FOPS_RO(ll_site_stats);



static int ll_max_readahead_mb_seq_show(struct seq_file *m, void *v)

static ssize_t max_read_ahead_mb_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_kobj);

	long pages_number;

	int mult;
@@ -232,23 +233,27 @@ static int ll_max_readahead_mb_seq_show(struct seq_file *m, void *v) 
	spin_unlock(&sbi->ll_lock);



	mult = 1 << (20 - PAGE_CACHE_SHIFT);

	return lprocfs_seq_read_frac_helper(m, pages_number, mult);

	return lprocfs_read_frac_helper(buf, PAGE_SIZE, 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)

static ssize_t max_read_ahead_mb_store(struct kobject *kobj,

				       struct attribute *attr,

				       const char *buffer,

				       size_t count)

{

	struct super_block *sb = ((struct seq_file *)file->private_data)->private;

	struct ll_sb_info *sbi = ll_s2sbi(sb);

	int mult, rc, pages_number;

	struct ll_sb_info *sbi = container_of(kobj, struct ll_sb_info,

					      ll_kobj);

	int rc;

	unsigned long pages_number;



	mult = 1 << (20 - PAGE_CACHE_SHIFT);

	rc = lprocfs_write_frac_helper(buffer, count, &pages_number, mult);

	rc = kstrtoul(buffer, 10, &pages_number);

	if (rc)

		return rc;



	if (pages_number < 0 || pages_number > totalram_pages / 2) {

	pages_number *= 1 << (20 - PAGE_CACHE_SHIFT); /* MB -> pages */



	if (pages_number > totalram_pages / 2) {



		CERROR("can't set file readahead more than %lu MB\n",

		       totalram_pages >> (20 - PAGE_CACHE_SHIFT + 1)); /*1/2 of RAM*/

		return -ERANGE;
@@ -260,7 +265,7 @@ static ssize_t ll_max_readahead_mb_seq_write(struct file *file, 


	return count;

}

LPROC_SEQ_FOPS(ll_max_readahead_mb);

LUSTRE_RW_ATTR(max_read_ahead_mb);



static int ll_max_readahead_per_file_mb_seq_show(struct seq_file *m, void *v)

{
@@ -840,7 +845,6 @@ static struct lprocfs_vars lprocfs_llite_obd_vars[] = { 
	/* { "mntpt_path",   ll_rd_path,	     0, 0 }, */

	{ "site",	  &ll_site_stats_fops,    NULL, 0 },

	/* { "filegroups",   lprocfs_rd_filegroups,  0, 0 }, */

	{ "max_read_ahead_mb", &ll_max_readahead_mb_fops, NULL },

	{ "max_read_ahead_per_file_mb", &ll_max_readahead_per_file_mb_fops,

		NULL },

	{ "max_read_ahead_whole_mb", &ll_max_read_ahead_whole_mb_fops, NULL },
@@ -875,6 +879,7 @@ static struct attribute *llite_attrs[] = { 
	&lustre_attr_client_type.attr,

	&lustre_attr_fstype.attr,

	&lustre_attr_uuid.attr,

	&lustre_attr_max_read_ahead_mb.attr,

	NULL,

};

drivers/staging/lustre/sysfs-fs-lustre

+7 −0
Original line number Diff line number Diff line
@@ -97,3 +97,10 @@ Date: May 2015 
Contact:	"Oleg Drokin" <oleg.drokin@intel.com>

Description:

		Shows this filesystem superblock uuid



What:		/sys/fs/lustre/llite/<fsname>-<uuid>/max_read_ahead_mb

Date:		May 2015

Contact:	"Oleg Drokin" <oleg.drokin@intel.com>

Description:

		Sets maximum number of megabytes in system memory to be

		given to read-ahead cache.