/*
* they are necessary regardless sysfs is disabled.
*/
void au_si_free(struct kobject *kobj)
{
struct au_sbinfo *sbinfo;
struct super_block *sb;
char *locked __maybe_unused; /* debug only */
sbinfo = container_of(kobj, struct au_sbinfo, si_kobj);
AuDebugOn(!list_empty(&sbinfo->si_plink.head));
AuDebugOn(sbinfo->si_plink_maint);
sb = sbinfo->si_sb;
si_write_lock(sb);
au_xino_clr(sb);
au_br_free(sbinfo);
si_write_unlock(sb);
AuDebugOn(radix_tree_gang_lookup
(&sbinfo->au_si_pid.tree, (void **)&locked,
/*first_index*/PID_MAX_DEFAULT - 1,
/*max_items*/sizeof(locked)/sizeof(*locked)));
kfree(sbinfo->si_branch);
kfree(sbinfo->au_si_pid.bitmap);
mutex_destroy(&sbinfo->si_xib_mtx);
AuRwDestroy(&sbinfo->si_rwsem);
kfree(sbinfo);
}
int si_write_lock(struct super_block *sb, int flags)
{
int err;
if (au_ftest_lock(flags, FLUSH))
au_nwt_flush(&au_sbi(sb)->si_nowait);
si_noflush_write_lock(sb);
err = au_plink_maint(sb, flags);
if (unlikely(err))
si_write_unlock(sb);
return err;
}
/*
* they are necessary regardless sysfs is disabled.
*/
void au_si_free(struct kobject *kobj)
{
struct au_sbinfo *sbinfo;
struct super_block *sb;
sbinfo = container_of(kobj, struct au_sbinfo, si_kobj);
AuDebugOn(!list_empty(&sbinfo->si_plink.head));
AuDebugOn(sbinfo->si_plink_maint);
sb = sbinfo->si_sb;
si_write_lock(sb);
au_xino_clr(sb);
au_br_free(sbinfo);
kfree(sbinfo->si_branch);
mutex_destroy(&sbinfo->si_xib_mtx);
si_write_unlock(sb);
AuRwDestroy(&sbinfo->si_rwsem);
kfree(sbinfo);
}
static int au_plink_maint_enter(struct file *file)
{
int err;
struct super_block *sb;
struct au_sbinfo *sbinfo;
err = 0;
sb = file->f_dentry->d_sb;
sbinfo = au_sbi(sb);
/* make sure i am the only one in this fs */
si_write_lock(sb);
/* spin_lock(&sbinfo->si_plink_maint_lock); */
if (!sbinfo->si_plink_maint)
sbinfo->si_plink_maint = file;
else
err = -EBUSY;
/* spin_unlock(&sbinfo->si_plink_maint_lock); */
si_write_unlock(sb);
return err;
}
void aufs_write_unlock(struct dentry *dentry)
{
di_write_unlock(dentry);
si_write_unlock(dentry->d_sb);
}
void aufs_write_unlock(struct dentry *dentry)
{
di_write_unlock(dentry);
si_write_unlock(dentry->d_sb);
//au_wkq_wait_nwtask();
}