Linux-libre 4.2-gnu

1 files changed, 0 insertions, 635 deletions

diff --git a/fs/aufs/super.h b/fs/aufs/super.h
deleted file mode 100644
index 95ffbbb29..000000000
--- a/fs/aufs/super.h
+++ /dev/null
@@ -1,635 +0,0 @@
-/*
- * Copyright (C) 2005-2015 Junjiro R. Okajima
- *
- * This program, aufs is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <http://www.gnu.org/licenses/>.
- */
-
-/*
- * super_block operations
- */
-
-#ifndef __AUFS_SUPER_H__
-#define __AUFS_SUPER_H__
-
-#ifdef __KERNEL__
-
-#include <linux/fs.h>
-#include <linux/kobject.h>
-#include "rwsem.h"
-#include "spl.h"
-#include "wkq.h"
-
-/* policies to select one among multiple writable branches */
-struct au_wbr_copyup_operations {
-	int (*copyup)(struct dentry *dentry);
-};
-
-#define AuWbr_DIR	1		/* target is a dir */
-#define AuWbr_PARENT	(1 << 1)	/* always require a parent */
-
-#define au_ftest_wbr(flags, name)	((flags) & AuWbr_##name)
-#define au_fset_wbr(flags, name)	{ (flags) |= AuWbr_##name; }
-#define au_fclr_wbr(flags, name)	{ (flags) &= ~AuWbr_##name; }
-
-struct au_wbr_create_operations {
-	int (*create)(struct dentry *dentry, unsigned int flags);
-	int (*init)(struct super_block *sb);
-	int (*fin)(struct super_block *sb);
-};
-
-struct au_wbr_mfs {
-	struct mutex	mfs_lock; /* protect this structure */
-	unsigned long	mfs_jiffy;
-	unsigned long	mfs_expire;
-	aufs_bindex_t	mfs_bindex;
-
-	unsigned long long	mfsrr_bytes;
-	unsigned long long	mfsrr_watermark;
-};
-
-struct pseudo_link {
-	union {
-		struct hlist_node hlist;
-		struct rcu_head rcu;
-	};
-	struct inode *inode;
-};
-
-#define AuPlink_NHASH 100
-static inline int au_plink_hash(ino_t ino)
-{
-	return ino % AuPlink_NHASH;
-}
-
-/* File-based Hierarchical Storage Management */
-struct au_fhsm {
-#ifdef CONFIG_AUFS_FHSM
-	/* allow only one process who can receive the notification */
-	spinlock_t		fhsm_spin;
-	pid_t			fhsm_pid;
-	wait_queue_head_t	fhsm_wqh;
-	atomic_t		fhsm_readable;
-
-	/* these are protected by si_rwsem */
-	unsigned long		fhsm_expire;
-	aufs_bindex_t		fhsm_bottom;
-#endif
-};
-
-struct au_branch;
-struct au_sbinfo {
-	/* nowait tasks in the system-wide workqueue */
-	struct au_nowait_tasks	si_nowait;
-
-	/*
-	 * tried sb->s_umount, but failed due to the dependecy between i_mutex.
-	 * rwsem for au_sbinfo is necessary.
-	 */
-	struct au_rwsem		si_rwsem;
-
-	/* prevent recursive locking in deleting inode */
-	struct {
-		unsigned long		*bitmap;
-		spinlock_t		tree_lock;
-		struct radix_tree_root	tree;
-	} au_si_pid;
-
-	/*
-	 * dirty approach to protect sb->sb_inodes and ->s_files (gone) from
-	 * remount.
-	 */
-	atomic_long_t		si_ninodes, si_nfiles;
-
-	/* branch management */
-	unsigned int		si_generation;
-
-	/* see AuSi_ flags */
-	unsigned char		au_si_status;
-
-	aufs_bindex_t		si_bend;
-
-	/* dirty trick to keep br_id plus */
-	unsigned int		si_last_br_id :
-				sizeof(aufs_bindex_t) * BITS_PER_BYTE - 1;
-	struct au_branch	**si_branch;
-
-	/* policy to select a writable branch */
-	unsigned char		si_wbr_copyup;
-	unsigned char		si_wbr_create;
-	struct au_wbr_copyup_operations *si_wbr_copyup_ops;
-	struct au_wbr_create_operations *si_wbr_create_ops;
-
-	/* round robin */
-	atomic_t		si_wbr_rr_next;
-
-	/* most free space */
-	struct au_wbr_mfs	si_wbr_mfs;
-
-	/* File-based Hierarchical Storage Management */
-	struct au_fhsm		si_fhsm;
-
-	/* mount flags */
-	/* include/asm-ia64/siginfo.h defines a macro named si_flags */
-	unsigned int		si_mntflags;
-
-	/* external inode number (bitmap and translation table) */
-	vfs_readf_t		si_xread;
-	vfs_writef_t		si_xwrite;
-	struct file		*si_xib;
-	struct mutex		si_xib_mtx; /* protect xib members */
-	unsigned long		*si_xib_buf;
-	unsigned long		si_xib_last_pindex;
-	int			si_xib_next_bit;
-	aufs_bindex_t		si_xino_brid;
-	unsigned long		si_xino_jiffy;
-	unsigned long		si_xino_expire;
-	/* reserved for future use */
-	/* unsigned long long	si_xib_limit; */	/* Max xib file size */
-
-#ifdef CONFIG_AUFS_EXPORT
-	/* i_generation */
-	struct file		*si_xigen;
-	atomic_t		si_xigen_next;
-#endif
-
-	/* dirty trick to suppoer atomic_open */
-	struct au_sphlhead	si_aopen;
-
-	/* vdir parameters */
-	unsigned long		si_rdcache;	/* max cache time in jiffies */
-	unsigned int		si_rdblk;	/* deblk size */
-	unsigned int		si_rdhash;	/* hash size */
-
-	/*
-	 * If the number of whiteouts are larger than si_dirwh, leave all of
-	 * them after au_whtmp_ren to reduce the cost of rmdir(2).
-	 * future fsck.aufs or kernel thread will remove them later.
-	 * Otherwise, remove all whiteouts and the dir in rmdir(2).
-	 */
-	unsigned int		si_dirwh;
-
-	/* pseudo_link list */
-	struct au_sphlhead	si_plink[AuPlink_NHASH];
-	wait_queue_head_t	si_plink_wq;
-	spinlock_t		si_plink_maint_lock;
-	pid_t			si_plink_maint_pid;
-
-	/* file list */
-	struct au_sphlhead	si_files;
-
-	/*
-	 * sysfs and lifetime management.
-	 * this is not a small structure and it may be a waste of memory in case
-	 * of sysfs is disabled, particulary when many aufs-es are mounted.
-	 * but using sysfs is majority.
-	 */
-	struct kobject		si_kobj;
-#ifdef CONFIG_DEBUG_FS
-	struct dentry		 *si_dbgaufs;
-	struct dentry		 *si_dbgaufs_plink;
-	struct dentry		 *si_dbgaufs_xib;
-#ifdef CONFIG_AUFS_EXPORT
-	struct dentry		 *si_dbgaufs_xigen;
-#endif
-#endif
-
-#ifdef CONFIG_AUFS_SBILIST
-	struct list_head	si_list;
-#endif
-
-	/* dirty, necessary for unmounting, sysfs and sysrq */
-	struct super_block	*si_sb;
-};
-
-/* sbinfo status flags */
-/*
- * set true when refresh_dirs() failed at remount time.
- * then try refreshing dirs at access time again.
- * if it is false, refreshing dirs at access time is unnecesary
- */
-#define AuSi_FAILED_REFRESH_DIR	1
-
-#define AuSi_FHSM		(1 << 1)	/* fhsm is active now */
-
-#ifndef CONFIG_AUFS_FHSM
-#undef AuSi_FHSM
-#define AuSi_FHSM		0
-#endif
-
-static inline unsigned char au_do_ftest_si(struct au_sbinfo *sbi,
-					   unsigned int flag)
-{
-	AuRwMustAnyLock(&sbi->si_rwsem);
-	return sbi->au_si_status & flag;
-}
-#define au_ftest_si(sbinfo, name)	au_do_ftest_si(sbinfo, AuSi_##name)
-#define au_fset_si(sbinfo, name) do { \
-	AuRwMustWriteLock(&(sbinfo)->si_rwsem); \
-	(sbinfo)->au_si_status |= AuSi_##name; \
-} while (0)
-#define au_fclr_si(sbinfo, name) do { \
-	AuRwMustWriteLock(&(sbinfo)->si_rwsem); \
-	(sbinfo)->au_si_status &= ~AuSi_##name; \
-} while (0)
-
-/* ---------------------------------------------------------------------- */
-
-/* policy to select one among writable branches */
-#define AuWbrCopyup(sbinfo, ...) \
-	((sbinfo)->si_wbr_copyup_ops->copyup(__VA_ARGS__))
-#define AuWbrCreate(sbinfo, ...) \
-	((sbinfo)->si_wbr_create_ops->create(__VA_ARGS__))
-
-/* flags for si_read_lock()/aufs_read_lock()/di_read_lock() */
-#define AuLock_DW		1		/* write-lock dentry */
-#define AuLock_IR		(1 << 1)	/* read-lock inode */
-#define AuLock_IW		(1 << 2)	/* write-lock inode */
-#define AuLock_FLUSH		(1 << 3)	/* wait for 'nowait' tasks */
-#define AuLock_DIR		(1 << 4)	/* target is a dir */
-#define AuLock_NOPLM		(1 << 5)	/* return err in plm mode */
-#define AuLock_NOPLMW		(1 << 6)	/* wait for plm mode ends */
-#define AuLock_GEN		(1 << 7)	/* test digen/iigen */
-#define au_ftest_lock(flags, name)	((flags) & AuLock_##name)
-#define au_fset_lock(flags, name) \
-	do { (flags) |= AuLock_##name; } while (0)
-#define au_fclr_lock(flags, name) \
-	do { (flags) &= ~AuLock_##name; } while (0)
-
-/* ---------------------------------------------------------------------- */
-
-/* super.c */
-extern struct file_system_type aufs_fs_type;
-struct inode *au_iget_locked(struct super_block *sb, ino_t ino);
-typedef unsigned long long (*au_arraycb_t)(void *array, unsigned long long max,
-					   void *arg);
-void au_array_free(void *array);
-void *au_array_alloc(unsigned long long *hint, au_arraycb_t cb, void *arg);
-struct inode **au_iarray_alloc(struct super_block *sb, unsigned long long *max);
-void au_iarray_free(struct inode **a, unsigned long long max);
-
-/* sbinfo.c */
-void au_si_free(struct kobject *kobj);
-int au_si_alloc(struct super_block *sb);
-int au_sbr_realloc(struct au_sbinfo *sbinfo, int nbr);
-
-unsigned int au_sigen_inc(struct super_block *sb);
-aufs_bindex_t au_new_br_id(struct super_block *sb);
-
-int si_read_lock(struct super_block *sb, int flags);
-int si_write_lock(struct super_block *sb, int flags);
-int aufs_read_lock(struct dentry *dentry, int flags);
-void aufs_read_unlock(struct dentry *dentry, int flags);
-void aufs_write_lock(struct dentry *dentry);
-void aufs_write_unlock(struct dentry *dentry);
-int aufs_read_and_write_lock2(struct dentry *d1, struct dentry *d2, int flags);
-void aufs_read_and_write_unlock2(struct dentry *d1, struct dentry *d2);
-
-int si_pid_test_slow(struct super_block *sb);
-void si_pid_set_slow(struct super_block *sb);
-void si_pid_clr_slow(struct super_block *sb);
-
-/* wbr_policy.c */
-extern struct au_wbr_copyup_operations au_wbr_copyup_ops[];
-extern struct au_wbr_create_operations au_wbr_create_ops[];
-int au_cpdown_dirs(struct dentry *dentry, aufs_bindex_t bdst);
-int au_wbr_nonopq(struct dentry *dentry, aufs_bindex_t bindex);
-int au_wbr_do_copyup_bu(struct dentry *dentry, aufs_bindex_t bstart);
-
-/* mvdown.c */
-int au_mvdown(struct dentry *dentry, struct aufs_mvdown __user *arg);
-
-#ifdef CONFIG_AUFS_FHSM
-/* fhsm.c */
-
-static inline pid_t au_fhsm_pid(struct au_fhsm *fhsm)
-{
-	pid_t pid;
-
-	spin_lock(&fhsm->fhsm_spin);
-	pid = fhsm->fhsm_pid;
-	spin_unlock(&fhsm->fhsm_spin);
-
-	return pid;
-}
-
-void au_fhsm_wrote(struct super_block *sb, aufs_bindex_t bindex, int force);
-void au_fhsm_wrote_all(struct super_block *sb, int force);
-int au_fhsm_fd(struct super_block *sb, int oflags);
-int au_fhsm_br_alloc(struct au_branch *br);
-void au_fhsm_set_bottom(struct super_block *sb, aufs_bindex_t bindex);
-void au_fhsm_fin(struct super_block *sb);
-void au_fhsm_init(struct au_sbinfo *sbinfo);
-void au_fhsm_set(struct au_sbinfo *sbinfo, unsigned int sec);
-void au_fhsm_show(struct seq_file *seq, struct au_sbinfo *sbinfo);
-#else
-AuStubVoid(au_fhsm_wrote, struct super_block *sb, aufs_bindex_t bindex,
-	   int force)
-AuStubVoid(au_fhsm_wrote_all, struct super_block *sb, int force)
-AuStub(int, au_fhsm_fd, return -EOPNOTSUPP, struct super_block *sb, int oflags)
-AuStub(pid_t, au_fhsm_pid, return 0, struct au_fhsm *fhsm)
-AuStubInt0(au_fhsm_br_alloc, struct au_branch *br)
-AuStubVoid(au_fhsm_set_bottom, struct super_block *sb, aufs_bindex_t bindex)
-AuStubVoid(au_fhsm_fin, struct super_block *sb)
-AuStubVoid(au_fhsm_init, struct au_sbinfo *sbinfo)
-AuStubVoid(au_fhsm_set, struct au_sbinfo *sbinfo, unsigned int sec)
-AuStubVoid(au_fhsm_show, struct seq_file *seq, struct au_sbinfo *sbinfo)
-#endif
-
-/* ---------------------------------------------------------------------- */
-
-static inline struct au_sbinfo *au_sbi(struct super_block *sb)
-{
-	return sb->s_fs_info;
-}
-
-/* ---------------------------------------------------------------------- */
-
-#ifdef CONFIG_AUFS_EXPORT
-int au_test_nfsd(void);
-void au_export_init(struct super_block *sb);
-void au_xigen_inc(struct inode *inode);
-int au_xigen_new(struct inode *inode);
-int au_xigen_set(struct super_block *sb, struct file *base);
-void au_xigen_clr(struct super_block *sb);
-
-static inline int au_busy_or_stale(void)
-{
-	if (!au_test_nfsd())
-		return -EBUSY;
-	return -ESTALE;
-}
-#else
-AuStubInt0(au_test_nfsd, void)
-AuStubVoid(au_export_init, struct super_block *sb)
-AuStubVoid(au_xigen_inc, struct inode *inode)
-AuStubInt0(au_xigen_new, struct inode *inode)
-AuStubInt0(au_xigen_set, struct super_block *sb, struct file *base)
-AuStubVoid(au_xigen_clr, struct super_block *sb)
-AuStub(int, au_busy_or_stale, return -EBUSY, void)
-#endif /* CONFIG_AUFS_EXPORT */
-
-/* ---------------------------------------------------------------------- */
-
-#ifdef CONFIG_AUFS_SBILIST
-/* module.c */
-extern struct au_splhead au_sbilist;
-
-static inline void au_sbilist_init(void)
-{
-	au_spl_init(&au_sbilist);
-}
-
-static inline void au_sbilist_add(struct super_block *sb)
-{
-	au_spl_add(&au_sbi(sb)->si_list, &au_sbilist);
-}
-
-static inline void au_sbilist_del(struct super_block *sb)
-{
-	au_spl_del(&au_sbi(sb)->si_list, &au_sbilist);
-}
-
-#ifdef CONFIG_AUFS_MAGIC_SYSRQ
-static inline void au_sbilist_lock(void)
-{
-	spin_lock(&au_sbilist.spin);
-}
-
-static inline void au_sbilist_unlock(void)
-{
-	spin_unlock(&au_sbilist.spin);
-}
-#define AuGFP_SBILIST	GFP_ATOMIC
-#else
-AuStubVoid(au_sbilist_lock, void)
-AuStubVoid(au_sbilist_unlock, void)
-#define AuGFP_SBILIST	GFP_NOFS
-#endif /* CONFIG_AUFS_MAGIC_SYSRQ */
-#else
-AuStubVoid(au_sbilist_init, void)
-AuStubVoid(au_sbilist_add, struct super_block *sb)
-AuStubVoid(au_sbilist_del, struct super_block *sb)
-AuStubVoid(au_sbilist_lock, void)
-AuStubVoid(au_sbilist_unlock, void)
-#define AuGFP_SBILIST	GFP_NOFS
-#endif
-
-/* ---------------------------------------------------------------------- */
-
-static inline void dbgaufs_si_null(struct au_sbinfo *sbinfo)
-{
-	/*
-	 * This function is a dynamic '__init' function actually,
-	 * so the tiny check for si_rwsem is unnecessary.
-	 */
-	/* AuRwMustWriteLock(&sbinfo->si_rwsem); */
-#ifdef CONFIG_DEBUG_FS
-	sbinfo->si_dbgaufs = NULL;
-	sbinfo->si_dbgaufs_plink = NULL;
-	sbinfo->si_dbgaufs_xib = NULL;
-#ifdef CONFIG_AUFS_EXPORT
-	sbinfo->si_dbgaufs_xigen = NULL;
-#endif
-#endif
-}
-
-/* ---------------------------------------------------------------------- */
-
-static inline pid_t si_pid_bit(void)
-{
-	/* the origin of pid is 1, but the bitmap's is 0 */
-	return current->pid - 1;
-}
-
-static inline int si_pid_test(struct super_block *sb)
-{
-	pid_t bit;
-
-	bit = si_pid_bit();
-	if (bit < PID_MAX_DEFAULT)
-		return test_bit(bit, au_sbi(sb)->au_si_pid.bitmap);
-	return si_pid_test_slow(sb);
-}
-
-static inline void si_pid_set(struct super_block *sb)
-{
-	pid_t bit;
-
-	bit = si_pid_bit();
-	if (bit < PID_MAX_DEFAULT) {
-		AuDebugOn(test_bit(bit, au_sbi(sb)->au_si_pid.bitmap));
-		set_bit(bit, au_sbi(sb)->au_si_pid.bitmap);
-		/* smp_mb(); */
-	} else
-		si_pid_set_slow(sb);
-}
-
-static inline void si_pid_clr(struct super_block *sb)
-{
-	pid_t bit;
-
-	bit = si_pid_bit();
-	if (bit < PID_MAX_DEFAULT) {
-		AuDebugOn(!test_bit(bit, au_sbi(sb)->au_si_pid.bitmap));
-		clear_bit(bit, au_sbi(sb)->au_si_pid.bitmap);
-		/* smp_mb(); */
-	} else
-		si_pid_clr_slow(sb);
-}
-
-/* ---------------------------------------------------------------------- */
-
-/* lock superblock. mainly for entry point functions */
-/*
- * __si_read_lock, __si_write_lock,
- * __si_read_unlock, __si_write_unlock, __si_downgrade_lock
- */
-AuSimpleRwsemFuncs(__si, struct super_block *sb, &au_sbi(sb)->si_rwsem);
-
-#define SiMustNoWaiters(sb)	AuRwMustNoWaiters(&au_sbi(sb)->si_rwsem)
-#define SiMustAnyLock(sb)	AuRwMustAnyLock(&au_sbi(sb)->si_rwsem)
-#define SiMustWriteLock(sb)	AuRwMustWriteLock(&au_sbi(sb)->si_rwsem)
-
-static inline void si_noflush_read_lock(struct super_block *sb)
-{
-	__si_read_lock(sb);
-	si_pid_set(sb);
-}
-
-static inline int si_noflush_read_trylock(struct super_block *sb)
-{
-	int locked;
-
-	locked = __si_read_trylock(sb);
-	if (locked)
-		si_pid_set(sb);
-	return locked;
-}
-
-static inline void si_noflush_write_lock(struct super_block *sb)
-{
-	__si_write_lock(sb);
-	si_pid_set(sb);
-}
-
-static inline int si_noflush_write_trylock(struct super_block *sb)
-{
-	int locked;
-
-	locked = __si_write_trylock(sb);
-	if (locked)
-		si_pid_set(sb);
-	return locked;
-}
-
-#if 0 /* reserved */
-static inline int si_read_trylock(struct super_block *sb, int flags)
-{
-	if (au_ftest_lock(flags, FLUSH))
-		au_nwt_flush(&au_sbi(sb)->si_nowait);
-	return si_noflush_read_trylock(sb);
-}
-#endif
-
-static inline void si_read_unlock(struct super_block *sb)
-{
-	si_pid_clr(sb);
-	__si_read_unlock(sb);
-}
-
-#if 0 /* reserved */
-static inline int si_write_trylock(struct super_block *sb, int flags)
-{
-	if (au_ftest_lock(flags, FLUSH))
-		au_nwt_flush(&au_sbi(sb)->si_nowait);
-	return si_noflush_write_trylock(sb);
-}
-#endif
-
-static inline void si_write_unlock(struct super_block *sb)
-{
-	si_pid_clr(sb);
-	__si_write_unlock(sb);
-}
-
-#if 0 /* reserved */
-static inline void si_downgrade_lock(struct super_block *sb)
-{
-	__si_downgrade_lock(sb);
-}
-#endif
-
-/* ---------------------------------------------------------------------- */
-
-static inline aufs_bindex_t au_sbend(struct super_block *sb)
-{
-	SiMustAnyLock(sb);
-	return au_sbi(sb)->si_bend;
-}
-
-static inline unsigned int au_mntflags(struct super_block *sb)
-{
-	SiMustAnyLock(sb);
-	return au_sbi(sb)->si_mntflags;
-}
-
-static inline unsigned int au_sigen(struct super_block *sb)
-{
-	SiMustAnyLock(sb);
-	return au_sbi(sb)->si_generation;
-}
-
-static inline void au_ninodes_inc(struct super_block *sb)
-{
-	atomic_long_inc(&au_sbi(sb)->si_ninodes);
-}
-
-static inline void au_ninodes_dec(struct super_block *sb)
-{
-	AuDebugOn(!atomic_long_read(&au_sbi(sb)->si_ninodes));
-	atomic_long_dec(&au_sbi(sb)->si_ninodes);
-}
-
-static inline void au_nfiles_inc(struct super_block *sb)
-{
-	atomic_long_inc(&au_sbi(sb)->si_nfiles);
-}
-
-static inline void au_nfiles_dec(struct super_block *sb)
-{
-	AuDebugOn(!atomic_long_read(&au_sbi(sb)->si_nfiles));
-	atomic_long_dec(&au_sbi(sb)->si_nfiles);
-}
-
-static inline struct au_branch *au_sbr(struct super_block *sb,
-				       aufs_bindex_t bindex)
-{
-	SiMustAnyLock(sb);
-	return au_sbi(sb)->si_branch[0 + bindex];
-}
-
-static inline void au_xino_brid_set(struct super_block *sb, aufs_bindex_t brid)
-{
-	SiMustWriteLock(sb);
-	au_sbi(sb)->si_xino_brid = brid;
-}
-
-static inline aufs_bindex_t au_xino_brid(struct super_block *sb)
-{
-	SiMustAnyLock(sb);
-	return au_sbi(sb)->si_xino_brid;
-}
-
-#endif /* __KERNEL__ */
-#endif /* __AUFS_SUPER_H__ */