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Diffstat (limited to 'fs/aufs/dbgaufs.c')
-rw-r--r--fs/aufs/dbgaufs.c419
1 files changed, 0 insertions, 419 deletions
diff --git a/fs/aufs/dbgaufs.c b/fs/aufs/dbgaufs.c
deleted file mode 100644
index 0aefb5ed8..000000000
--- a/fs/aufs/dbgaufs.c
+++ /dev/null
@@ -1,419 +0,0 @@
-/*
- * Copyright (C) 2005-2016 Junjiro R. Okajima
- */
-
-/*
- * debugfs interface
- */
-
-#include <linux/debugfs.h>
-#include "aufs.h"
-
-#ifndef CONFIG_SYSFS
-#error DEBUG_FS depends upon SYSFS
-#endif
-
-static struct dentry *dbgaufs;
-static const mode_t dbgaufs_mode = S_IRUSR | S_IRGRP | S_IROTH;
-
-/* 20 is max digits length of ulong 64 */
-struct dbgaufs_arg {
- int n;
- char a[20 * 4];
-};
-
-/*
- * common function for all XINO files
- */
-static int dbgaufs_xi_release(struct inode *inode __maybe_unused,
- struct file *file)
-{
- kfree(file->private_data);
- return 0;
-}
-
-static int dbgaufs_xi_open(struct file *xf, struct file *file, int do_fcnt)
-{
- int err;
- struct kstat st;
- struct dbgaufs_arg *p;
-
- err = -ENOMEM;
- p = kmalloc(sizeof(*p), GFP_NOFS);
- if (unlikely(!p))
- goto out;
-
- err = 0;
- p->n = 0;
- file->private_data = p;
- if (!xf)
- goto out;
-
- err = vfs_getattr(&xf->f_path, &st);
- if (!err) {
- if (do_fcnt)
- p->n = snprintf
- (p->a, sizeof(p->a), "%ld, %llux%lu %lld\n",
- (long)file_count(xf), st.blocks, st.blksize,
- (long long)st.size);
- else
- p->n = snprintf(p->a, sizeof(p->a), "%llux%lu %lld\n",
- st.blocks, st.blksize,
- (long long)st.size);
- AuDebugOn(p->n >= sizeof(p->a));
- } else {
- p->n = snprintf(p->a, sizeof(p->a), "err %d\n", err);
- err = 0;
- }
-
-out:
- return err;
-
-}
-
-static ssize_t dbgaufs_xi_read(struct file *file, char __user *buf,
- size_t count, loff_t *ppos)
-{
- struct dbgaufs_arg *p;
-
- p = file->private_data;
- return simple_read_from_buffer(buf, count, ppos, p->a, p->n);
-}
-
-/* ---------------------------------------------------------------------- */
-
-struct dbgaufs_plink_arg {
- int n;
- char a[];
-};
-
-static int dbgaufs_plink_release(struct inode *inode __maybe_unused,
- struct file *file)
-{
- free_page((unsigned long)file->private_data);
- return 0;
-}
-
-static int dbgaufs_plink_open(struct inode *inode, struct file *file)
-{
- int err, i, limit;
- unsigned long n, sum;
- struct dbgaufs_plink_arg *p;
- struct au_sbinfo *sbinfo;
- struct super_block *sb;
- struct au_sphlhead *sphl;
-
- err = -ENOMEM;
- p = (void *)get_zeroed_page(GFP_NOFS);
- if (unlikely(!p))
- goto out;
-
- err = -EFBIG;
- sbinfo = inode->i_private;
- sb = sbinfo->si_sb;
- si_noflush_read_lock(sb);
- if (au_opt_test(au_mntflags(sb), PLINK)) {
- limit = PAGE_SIZE - sizeof(p->n);
-
- /* the number of buckets */
- n = snprintf(p->a + p->n, limit, "%d\n", AuPlink_NHASH);
- p->n += n;
- limit -= n;
-
- sum = 0;
- for (i = 0, sphl = sbinfo->si_plink;
- i < AuPlink_NHASH;
- i++, sphl++) {
- n = au_sphl_count(sphl);
- sum += n;
-
- n = snprintf(p->a + p->n, limit, "%lu ", n);
- p->n += n;
- limit -= n;
- if (unlikely(limit <= 0))
- goto out_free;
- }
- p->a[p->n - 1] = '\n';
-
- /* the sum of plinks */
- n = snprintf(p->a + p->n, limit, "%lu\n", sum);
- p->n += n;
- limit -= n;
- if (unlikely(limit <= 0))
- goto out_free;
- } else {
-#define str "1\n0\n0\n"
- p->n = sizeof(str) - 1;
- strcpy(p->a, str);
-#undef str
- }
- si_read_unlock(sb);
-
- err = 0;
- file->private_data = p;
- goto out; /* success */
-
-out_free:
- free_page((unsigned long)p);
-out:
- return err;
-}
-
-static ssize_t dbgaufs_plink_read(struct file *file, char __user *buf,
- size_t count, loff_t *ppos)
-{
- struct dbgaufs_plink_arg *p;
-
- p = file->private_data;
- return simple_read_from_buffer(buf, count, ppos, p->a, p->n);
-}
-
-static const struct file_operations dbgaufs_plink_fop = {
- .owner = THIS_MODULE,
- .open = dbgaufs_plink_open,
- .release = dbgaufs_plink_release,
- .read = dbgaufs_plink_read
-};
-
-/* ---------------------------------------------------------------------- */
-
-static int dbgaufs_xib_open(struct inode *inode, struct file *file)
-{
- int err;
- struct au_sbinfo *sbinfo;
- struct super_block *sb;
-
- sbinfo = inode->i_private;
- sb = sbinfo->si_sb;
- si_noflush_read_lock(sb);
- err = dbgaufs_xi_open(sbinfo->si_xib, file, /*do_fcnt*/0);
- si_read_unlock(sb);
- return err;
-}
-
-static const struct file_operations dbgaufs_xib_fop = {
- .owner = THIS_MODULE,
- .open = dbgaufs_xib_open,
- .release = dbgaufs_xi_release,
- .read = dbgaufs_xi_read
-};
-
-/* ---------------------------------------------------------------------- */
-
-#define DbgaufsXi_PREFIX "xi"
-
-static int dbgaufs_xino_open(struct inode *inode, struct file *file)
-{
- int err;
- long l;
- struct au_sbinfo *sbinfo;
- struct super_block *sb;
- struct file *xf;
- struct qstr *name;
-
- err = -ENOENT;
- xf = NULL;
- name = &file->f_path.dentry->d_name;
- if (unlikely(name->len < sizeof(DbgaufsXi_PREFIX)
- || memcmp(name->name, DbgaufsXi_PREFIX,
- sizeof(DbgaufsXi_PREFIX) - 1)))
- goto out;
- err = kstrtol(name->name + sizeof(DbgaufsXi_PREFIX) - 1, 10, &l);
- if (unlikely(err))
- goto out;
-
- sbinfo = inode->i_private;
- sb = sbinfo->si_sb;
- si_noflush_read_lock(sb);
- if (l <= au_sbend(sb)) {
- xf = au_sbr(sb, (aufs_bindex_t)l)->br_xino.xi_file;
- err = dbgaufs_xi_open(xf, file, /*do_fcnt*/1);
- } else
- err = -ENOENT;
- si_read_unlock(sb);
-
-out:
- return err;
-}
-
-static const struct file_operations dbgaufs_xino_fop = {
- .owner = THIS_MODULE,
- .open = dbgaufs_xino_open,
- .release = dbgaufs_xi_release,
- .read = dbgaufs_xi_read
-};
-
-void dbgaufs_brs_del(struct super_block *sb, aufs_bindex_t bindex)
-{
- aufs_bindex_t bend;
- struct au_branch *br;
- struct au_xino_file *xi;
-
- if (!au_sbi(sb)->si_dbgaufs)
- return;
-
- bend = au_sbend(sb);
- for (; bindex <= bend; bindex++) {
- br = au_sbr(sb, bindex);
- xi = &br->br_xino;
- debugfs_remove(xi->xi_dbgaufs);
- xi->xi_dbgaufs = NULL;
- }
-}
-
-void dbgaufs_brs_add(struct super_block *sb, aufs_bindex_t bindex)
-{
- struct au_sbinfo *sbinfo;
- struct dentry *parent;
- struct au_branch *br;
- struct au_xino_file *xi;
- aufs_bindex_t bend;
- char name[sizeof(DbgaufsXi_PREFIX) + 5]; /* "xi" bindex NULL */
-
- sbinfo = au_sbi(sb);
- parent = sbinfo->si_dbgaufs;
- if (!parent)
- return;
-
- bend = au_sbend(sb);
- for (; bindex <= bend; bindex++) {
- snprintf(name, sizeof(name), DbgaufsXi_PREFIX "%d", bindex);
- br = au_sbr(sb, bindex);
- xi = &br->br_xino;
- AuDebugOn(xi->xi_dbgaufs);
- xi->xi_dbgaufs = debugfs_create_file(name, dbgaufs_mode, parent,
- sbinfo, &dbgaufs_xino_fop);
- /* ignore an error */
- if (unlikely(!xi->xi_dbgaufs))
- AuWarn1("failed %s under debugfs\n", name);
- }
-}
-
-/* ---------------------------------------------------------------------- */
-
-#ifdef CONFIG_AUFS_EXPORT
-static int dbgaufs_xigen_open(struct inode *inode, struct file *file)
-{
- int err;
- struct au_sbinfo *sbinfo;
- struct super_block *sb;
-
- sbinfo = inode->i_private;
- sb = sbinfo->si_sb;
- si_noflush_read_lock(sb);
- err = dbgaufs_xi_open(sbinfo->si_xigen, file, /*do_fcnt*/0);
- si_read_unlock(sb);
- return err;
-}
-
-static const struct file_operations dbgaufs_xigen_fop = {
- .owner = THIS_MODULE,
- .open = dbgaufs_xigen_open,
- .release = dbgaufs_xi_release,
- .read = dbgaufs_xi_read
-};
-
-static int dbgaufs_xigen_init(struct au_sbinfo *sbinfo)
-{
- int err;
-
- /*
- * This function is a dynamic '__init' function actually,
- * so the tiny check for si_rwsem is unnecessary.
- */
- /* AuRwMustWriteLock(&sbinfo->si_rwsem); */
-
- err = -EIO;
- sbinfo->si_dbgaufs_xigen = debugfs_create_file
- ("xigen", dbgaufs_mode, sbinfo->si_dbgaufs, sbinfo,
- &dbgaufs_xigen_fop);
- if (sbinfo->si_dbgaufs_xigen)
- err = 0;
-
- return err;
-}
-#else
-static int dbgaufs_xigen_init(struct au_sbinfo *sbinfo)
-{
- return 0;
-}
-#endif /* CONFIG_AUFS_EXPORT */
-
-/* ---------------------------------------------------------------------- */
-
-void dbgaufs_si_fin(struct au_sbinfo *sbinfo)
-{
- /*
- * This function is a dynamic '__fin' function actually,
- * so the tiny check for si_rwsem is unnecessary.
- */
- /* AuRwMustWriteLock(&sbinfo->si_rwsem); */
-
- debugfs_remove_recursive(sbinfo->si_dbgaufs);
- sbinfo->si_dbgaufs = NULL;
- kobject_put(&sbinfo->si_kobj);
-}
-
-int dbgaufs_si_init(struct au_sbinfo *sbinfo)
-{
- int err;
- char name[SysaufsSiNameLen];
-
- /*
- * This function is a dynamic '__init' function actually,
- * so the tiny check for si_rwsem is unnecessary.
- */
- /* AuRwMustWriteLock(&sbinfo->si_rwsem); */
-
- err = -ENOENT;
- if (!dbgaufs) {
- AuErr1("/debug/aufs is uninitialized\n");
- goto out;
- }
-
- err = -EIO;
- sysaufs_name(sbinfo, name);
- sbinfo->si_dbgaufs = debugfs_create_dir(name, dbgaufs);
- if (unlikely(!sbinfo->si_dbgaufs))
- goto out;
- kobject_get(&sbinfo->si_kobj);
-
- sbinfo->si_dbgaufs_xib = debugfs_create_file
- ("xib", dbgaufs_mode, sbinfo->si_dbgaufs, sbinfo,
- &dbgaufs_xib_fop);
- if (unlikely(!sbinfo->si_dbgaufs_xib))
- goto out_dir;
-
- sbinfo->si_dbgaufs_plink = debugfs_create_file
- ("plink", dbgaufs_mode, sbinfo->si_dbgaufs, sbinfo,
- &dbgaufs_plink_fop);
- if (unlikely(!sbinfo->si_dbgaufs_plink))
- goto out_dir;
-
- err = dbgaufs_xigen_init(sbinfo);
- if (!err)
- goto out; /* success */
-
-out_dir:
- dbgaufs_si_fin(sbinfo);
-out:
- return err;
-}
-
-/* ---------------------------------------------------------------------- */
-
-void dbgaufs_fin(void)
-{
- debugfs_remove(dbgaufs);
-}
-
-int __init dbgaufs_init(void)
-{
- int err;
-
- err = -EIO;
- dbgaufs = debugfs_create_dir(AUFS_NAME, NULL);
- if (dbgaufs)
- err = 0;
- return err;
-}