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ext4: move procfs registration code to fs/ext4/sysfs.c 

This allows us to refactor the procfs code, which saves a bit of
compiled space.  More importantly it isolates most of the procfs
support code into a single file, so it's easier to #ifdef it out if
the proc file system has been disabled.

Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Theodore Ts'o 2015-09-23 12:46:17 -04:00
parent 76d33bca55
commit ebd173beb8
6 changed files with 77 additions and 106 deletions
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3
fs/ext4/ext4.h
View File

@ -2245,6 +2245,7 @@ extern int ext4_init_inode_table(struct super_block *sb,
extern void ext4_end_bitmap_read(struct buffer_head *bh, int uptodate);
/* mballoc.c */
extern const struct file_operations ext4_seq_mb_groups_fops;
extern long ext4_mb_stats;
extern long ext4_mb_max_to_scan;
extern int ext4_mb_init(struct super_block *);
@ -2372,6 +2373,7 @@ extern int ext4_group_extend(struct super_block *sb,
extern int ext4_resize_fs(struct super_block *sb, ext4_fsblk_t n_blocks_count);
/* super.c */
extern int ext4_seq_options_show(struct seq_file *seq, void *offset);
extern int ext4_calculate_overhead(struct super_block *sb);
extern void ext4_superblock_csum_set(struct super_block *sb);
extern void *ext4_kvmalloc(size_t size, gfp_t flags);
@ -2905,6 +2907,7 @@ extern const struct inode_operations ext4_fast_symlink_inode_operations;
/* sysfs.c */
extern int ext4_register_sysfs(struct super_block *sb);
extern void ext4_unregister_sysfs(struct super_block *sb);
extern int __init ext4_init_sysfs(void);
extern void ext4_exit_sysfs(void);

60
fs/ext4/extents_status.c
View File

@ -1089,20 +1089,9 @@ static unsigned long ext4_es_scan(struct shrinker *shrink,
return nr_shrunk;
}
static void *ext4_es_seq_shrinker_info_start(struct seq_file *seq, loff_t *pos)
int ext4_seq_es_shrinker_info_show(struct seq_file *seq, void *v)
{
return *pos ? NULL : SEQ_START_TOKEN;
}
static void *
ext4_es_seq_shrinker_info_next(struct seq_file *seq, void *v, loff_t *pos)
{
return NULL;
}
static int ext4_es_seq_shrinker_info_show(struct seq_file *seq, void *v)
{
struct ext4_sb_info *sbi = seq->private;
struct ext4_sb_info *sbi = EXT4_SB((struct super_block *) seq->private);
struct ext4_es_stats *es_stats = &sbi->s_es_stats;
struct ext4_inode_info *ei, *max = NULL;
unsigned int inode_cnt = 0;
@ -1143,45 +1132,6 @@ static int ext4_es_seq_shrinker_info_show(struct seq_file *seq, void *v)
return 0;
}
static void ext4_es_seq_shrinker_info_stop(struct seq_file *seq, void *v)
{
}
static const struct seq_operations ext4_es_seq_shrinker_info_ops = {
.start = ext4_es_seq_shrinker_info_start,
.next = ext4_es_seq_shrinker_info_next,
.stop = ext4_es_seq_shrinker_info_stop,
.show = ext4_es_seq_shrinker_info_show,
};
static int
ext4_es_seq_shrinker_info_open(struct inode *inode, struct file *file)
{
int ret;
ret = seq_open(file, &ext4_es_seq_shrinker_info_ops);
if (!ret) {
struct seq_file *m = file->private_data;
m->private = PDE_DATA(inode);
}
return ret;
}
static int
ext4_es_seq_shrinker_info_release(struct inode *inode, struct file *file)
{
return seq_release(inode, file);
}
static const struct file_operations ext4_es_seq_shrinker_info_fops = {
.owner = THIS_MODULE,
.open = ext4_es_seq_shrinker_info_open,
.read = seq_read,
.llseek = seq_lseek,
.release = ext4_es_seq_shrinker_info_release,
};
int ext4_es_register_shrinker(struct ext4_sb_info *sbi)
{
int err;
@ -1210,10 +1160,6 @@ int ext4_es_register_shrinker(struct ext4_sb_info *sbi)
if (err)
goto err2;
if (sbi->s_proc)
proc_create_data("es_shrinker_info", S_IRUGO, sbi->s_proc,
&ext4_es_seq_shrinker_info_fops, sbi);
return 0;
err2:
@ -1225,8 +1171,6 @@ err1:
void ext4_es_unregister_shrinker(struct ext4_sb_info *sbi)
{
if (sbi->s_proc)
remove_proc_entry("es_shrinker_info", sbi->s_proc);
percpu_counter_destroy(&sbi->s_es_stats.es_stats_all_cnt);
percpu_counter_destroy(&sbi->s_es_stats.es_stats_shk_cnt);
unregister_shrinker(&sbi->s_es_shrinker);

2
fs/ext4/extents_status.h
View File

@ -172,4 +172,6 @@ static inline void ext4_es_store_pblock_status(struct extent_status *es,
extern int ext4_es_register_shrinker(struct ext4_sb_info *sbi);
extern void ext4_es_unregister_shrinker(struct ext4_sb_info *sbi);
extern int ext4_seq_es_shrinker_info_show(struct seq_file *seq, void *v);
#endif /* _EXT4_EXTENTS_STATUS_H */

9
fs/ext4/mballoc.c
View File

@ -2333,7 +2333,7 @@ static int ext4_mb_seq_groups_open(struct inode *inode, struct file *file)
}
static const struct file_operations ext4_mb_seq_groups_fops = {
const struct file_operations ext4_seq_mb_groups_fops = {
.owner = THIS_MODULE,
.open = ext4_mb_seq_groups_open,
.read = seq_read,
@ -2661,10 +2661,6 @@ int ext4_mb_init(struct super_block *sb)
if (ret != 0)
goto out_free_locality_groups;
if (sbi->s_proc)
proc_create_data("mb_groups", S_IRUGO, sbi->s_proc,
&ext4_mb_seq_groups_fops, sb);
return 0;
out_free_locality_groups:
@ -2705,9 +2701,6 @@ int ext4_mb_release(struct super_block *sb)
struct ext4_sb_info *sbi = EXT4_SB(sb);
struct kmem_cache *cachep = get_groupinfo_cache(sb->s_blocksize_bits);
if (sbi->s_proc)
remove_proc_entry("mb_groups", sbi->s_proc);
if (sbi->s_group_info) {
for (i = 0; i < ngroups; i++) {
grinfo = ext4_get_group_info(sb, i);

41
fs/ext4/super.c
View File

@ -34,7 +34,6 @@
#include <linux/namei.h>
#include <linux/quotaops.h>
#include <linux/seq_file.h>
#include <linux/proc_fs.h>
#include <linux/ctype.h>
#include <linux/log2.h>
#include <linux/crc16.h>
@ -54,7 +53,6 @@
#define CREATE_TRACE_POINTS
#include <trace/events/ext4.h>
static struct proc_dir_entry *ext4_proc_root;
static struct ext4_lazy_init *ext4_li_info;
static struct mutex ext4_li_mtx;
static int ext4_mballoc_ready;
@ -797,6 +795,7 @@ static void ext4_put_super(struct super_block *sb)
ext4_abort(sb, "Couldn't clean up the journal");
}
ext4_unregister_sysfs(sb);
ext4_es_unregister_shrinker(sbi);
del_timer_sync(&sbi->s_err_report);
ext4_release_system_zone(sb);
@ -811,12 +810,6 @@ static void ext4_put_super(struct super_block *sb)
if (!(sb->s_flags & MS_RDONLY))
ext4_commit_super(sb, 1);
if (sbi->s_proc) {
remove_proc_entry("options", sbi->s_proc);
remove_proc_entry(sb->s_id, ext4_proc_root);
}
kobject_del(&sbi->s_kobj);
for (i = 0; i < sbi->s_gdb_count; i++)
brelse(sbi->s_group_desc[i]);
kvfree(sbi->s_group_desc);
@ -1877,7 +1870,7 @@ static int ext4_show_options(struct seq_file *seq, struct dentry *root)
return _ext4_show_options(seq, root->d_sb, 0);
}
static int options_seq_show(struct seq_file *seq, void *offset)
int ext4_seq_options_show(struct seq_file *seq, void *offset)
{
struct super_block *sb = seq->private;
int rc;
@ -1888,19 +1881,6 @@ static int options_seq_show(struct seq_file *seq, void *offset)
return rc;
}
static int options_open_fs(struct inode *inode, struct file *file)
{
return single_open(file, options_seq_show, PDE_DATA(inode));
}
static const struct file_operations ext4_seq_options_fops = {
.owner = THIS_MODULE,
.open = options_open_fs,
.read = seq_read,
.llseek = seq_lseek,
.release = single_release,
};
static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es,
int read_only)
{
@ -3616,13 +3596,6 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
goto failed_mount;
}
if (ext4_proc_root)
sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root);
if (sbi->s_proc)
proc_create_data("options", S_IRUGO, sbi->s_proc,
&ext4_seq_options_fops, sb);
bgl_lock_init(sbi->s_blockgroup_lock);
for (i = 0; i < db_count; i++) {
@ -3960,7 +3933,7 @@ cantfind_ext4:
#ifdef CONFIG_QUOTA
failed_mount8:
kobject_del(&sbi->s_kobj);
ext4_unregister_sysfs(sb);
#endif
failed_mount7:
ext4_unregister_li_request(sb);
@ -4000,10 +3973,6 @@ failed_mount2:
failed_mount:
if (sbi->s_chksum_driver)
crypto_free_shash(sbi->s_chksum_driver);
if (sbi->s_proc) {
remove_proc_entry("options", sbi->s_proc);
remove_proc_entry(sb->s_id, ext4_proc_root);
}
#ifdef CONFIG_QUOTA
for (i = 0; i < EXT4_MAXQUOTAS; i++)
kfree(sbi->s_qf_names[i]);
@ -5264,7 +5233,6 @@ static int __init ext4_init_fs(void)
err = ext4_init_system_zone();
if (err)
goto out4;
ext4_proc_root = proc_mkdir("fs/ext4", NULL);
err = ext4_init_sysfs();
if (err)
@ -5295,8 +5263,6 @@ out1:
out2:
ext4_exit_sysfs();
out3:
if (ext4_proc_root)
remove_proc_entry("fs/ext4", NULL);
ext4_exit_system_zone();
out4:
ext4_exit_pageio();
@ -5316,7 +5282,6 @@ static void __exit ext4_exit_fs(void)
destroy_inodecache();
ext4_exit_mballoc();
ext4_exit_sysfs();
remove_proc_entry("fs/ext4", NULL);
ext4_exit_system_zone();
ext4_exit_pageio();
ext4_exit_es();

68
fs/ext4/sysfs.c
View File

@ -34,6 +34,9 @@ typedef enum {
ptr_ext4_super_block_offset,
} attr_ptr_t;
static const char *proc_dirname = "fs/ext4";
static struct proc_dir_entry *ext4_proc_root;
struct ext4_attr {
struct attribute attr;
short attr_id;
@ -347,14 +350,71 @@ static struct kobject ext4_feat = {
.kset = &ext4_kset,
};
#define PROC_FILE_SHOW_DEFN(name) \
static int name##_open(struct inode *inode, struct file *file) \
{ \
return single_open(file, ext4_seq_##name##_show, PDE_DATA(inode)); \
} \
\
const struct file_operations ext4_seq_##name##_fops = { \
.owner = THIS_MODULE, \
.open = name##_open, \
.read = seq_read, \
.llseek = seq_lseek, \
.release = single_release, \
}
#define PROC_FILE_LIST(name) \
{ __stringify(name), &ext4_seq_##name##_fops }
PROC_FILE_SHOW_DEFN(es_shrinker_info);
PROC_FILE_SHOW_DEFN(options);
static struct ext4_proc_files {
const char *name;
const struct file_operations *fops;
} proc_files[] = {
PROC_FILE_LIST(options),
PROC_FILE_LIST(es_shrinker_info),
PROC_FILE_LIST(mb_groups),
{ NULL, NULL },
};
int ext4_register_sysfs(struct super_block *sb)
{
struct ext4_sb_info *sbi = EXT4_SB(sb);
struct ext4_proc_files *p;
int err;
sbi->s_kobj.kset = &ext4_kset;
init_completion(&sbi->s_kobj_unregister);
return kobject_init_and_add(&sbi->s_kobj, &ext4_sb_ktype, NULL,
"%s", sb->s_id);
err = kobject_init_and_add(&sbi->s_kobj, &ext4_sb_ktype, NULL,
"%s", sb->s_id);
if (err)
return err;
if (ext4_proc_root)
sbi->s_proc = proc_mkdir(sb->s_id, ext4_proc_root);
if (sbi->s_proc) {
for (p = proc_files; p->name; p++)
proc_create_data(p->name, S_IRUGO, sbi->s_proc,
p->fops, sb);
}
return 0;
}
void ext4_unregister_sysfs(struct super_block *sb)
{
struct ext4_sb_info *sbi = EXT4_SB(sb);
struct ext4_proc_files *p;
if (sbi->s_proc) {
for (p = proc_files; p->name; p++)
remove_proc_entry(p->name, sbi->s_proc);
remove_proc_entry(sb->s_id, ext4_proc_root);
}
kobject_del(&sbi->s_kobj);
}
int __init ext4_init_sysfs(void)
@ -371,6 +431,8 @@ int __init ext4_init_sysfs(void)
NULL, "features");
if (ret)
kset_unregister(&ext4_kset);
else
ext4_proc_root = proc_mkdir(proc_dirname, NULL);
return ret;
}
@ -378,5 +440,7 @@ void ext4_exit_sysfs(void)
{
kobject_put(&ext4_feat);
kset_unregister(&ext4_kset);
remove_proc_entry(proc_dirname, NULL);
ext4_proc_root = NULL;
}