mirrors/scoutfs
1
0
Fork 0
mirror of https://github.com/versity/scoutfs.git synced 2026-01-09 21:27:25 +00:00
Code Issues Packages Projects Releases Wiki Activity

scoutfs: add mount_options/ sysfs dir

Browse Source 
Add a directory per mount that shows the values of all the mount
options.

Signed-off-by: Zach Brown <zab@versity.com>
This commit is contained in:
Zach Brown
2019-06-05 14:22:50 -07:00
committed by Zach Brown
parent 7d56d8f34f
commit a239f6093d
3 changed files with 23 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

19
kmod/src/super.c
View File

@@ -143,6 +143,21 @@ static int scoutfs_show_options(struct seq_file *seq, struct dentry *root)
return 0;
}
static ssize_t uniq_name_show(struct kobject *kobj,
struct kobj_attribute *attr, char *buf)
{
struct super_block *sb = SCOUTFS_SYSFS_ATTRS_SB(kobj);
struct mount_options *opts = &SCOUTFS_SB(sb)->opts;
return snprintf(buf, PAGE_SIZE, "%s\n", opts->uniq_name);
}
SCOUTFS_ATTR_RO(uniq_name);
static struct attribute *mount_options_attrs[] = {
SCOUTFS_ATTR_PTR(uniq_name),
NULL,
};
static int scoutfs_sync_fs(struct super_block *sb, int wait)
{
trace_scoutfs_sync_fs(sb, wait);
@@ -185,6 +200,7 @@ static void scoutfs_put_super(struct super_block *sb)
scoutfs_item_destroy(sb);
scoutfs_destroy_triggers(sb);
scoutfs_options_destroy(sb);
scoutfs_sysfs_destroy_attrs(sb, &sbi->mopts_ssa);
debugfs_remove(sbi->debug_root);
scoutfs_destroy_counters(sb);
scoutfs_destroy_sysfs(sb);
@@ -357,6 +373,7 @@ static int scoutfs_fill_super(struct super_block *sb, void *data, int silent)
spin_lock_init(&sbi->trans_write_lock);
INIT_DELAYED_WORK(&sbi->trans_write_work, scoutfs_trans_write_func);
init_waitqueue_head(&sbi->trans_write_wq);
scoutfs_sysfs_init_attrs(sb, &sbi->mopts_ssa);
ret = scoutfs_parse_options(sb, data, &opts);
if (ret)
@@ -376,6 +393,8 @@ static int scoutfs_fill_super(struct super_block *sb, void *data, int silent)
scoutfs_read_super(sb, &SCOUTFS_SB(sb)->super) ?:
scoutfs_debugfs_setup(sb) ?:
scoutfs_options_setup(sb) ?:
scoutfs_sysfs_create_attrs(sb, &sbi->mopts_ssa,
mount_options_attrs, "mount_options") ?:
scoutfs_setup_triggers(sb) ?:
scoutfs_seg_setup(sb) ?:
scoutfs_item_setup(sb) ?:

2
kmod/src/super.h
View File

@@ -7,6 +7,7 @@
#include "format.h"
#include "options.h"
#include "data.h"
#include "sysfs.h"
struct scoutfs_counters;
struct scoutfs_triggers;
@@ -75,6 +76,7 @@ struct scoutfs_sb_info {
struct mount_options opts;
struct options_sb_info *options;
struct scoutfs_sysfs_attrs mopts_ssa;
struct dentry *debug_root;

2
kmod/src/sysfs.h
View File

@@ -1,6 +1,8 @@
#ifndef _SCOUTFS_SYSFS_H_
#define _SCOUTFS_SYSFS_H_
#include <linux/kobject.h>
/*
* We have some light wrappers around sysfs attributes to make it safe
* to tear down the attributes before freeing the data they describe.