diff options
author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-03-25 03:53:42 -0300 |
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committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-03-25 03:53:42 -0300 |
commit | 03dd4cb26d967f9588437b0fc9cc0e8353322bb7 (patch) | |
tree | fa581f6dc1c0596391690d1f67eceef3af8246dc /fs/aufs/dentry.h | |
parent | d4e493caf788ef44982e131ff9c786546904d934 (diff) |
Linux-libre 4.5-gnu
Diffstat (limited to 'fs/aufs/dentry.h')
-rw-r--r-- | fs/aufs/dentry.h | 221 |
1 files changed, 0 insertions, 221 deletions
diff --git a/fs/aufs/dentry.h b/fs/aufs/dentry.h deleted file mode 100644 index c794adf59..000000000 --- a/fs/aufs/dentry.h +++ /dev/null @@ -1,221 +0,0 @@ -/* - * Copyright (C) 2005-2016 Junjiro R. Okajima - */ - -/* - * lookup and dentry operations - */ - -#ifndef __AUFS_DENTRY_H__ -#define __AUFS_DENTRY_H__ - -#ifdef __KERNEL__ - -#include <linux/dcache.h> -#include "rwsem.h" - -struct au_hdentry { - struct dentry *hd_dentry; - aufs_bindex_t hd_id; -}; - -struct au_dinfo { - atomic_t di_generation; - - struct au_rwsem di_rwsem; - aufs_bindex_t di_bstart, di_bend, di_bwh, di_bdiropq; - unsigned char di_tmpfile; /* to allow the different name */ - struct au_hdentry *di_hdentry; -} ____cacheline_aligned_in_smp; - -/* ---------------------------------------------------------------------- */ - -/* dentry.c */ -extern const struct dentry_operations aufs_dop, aufs_dop_noreval; -struct au_branch; -struct dentry *au_sio_lkup_one(struct qstr *name, struct dentry *parent); -int au_h_verify(struct dentry *h_dentry, unsigned int udba, struct inode *h_dir, - struct dentry *h_parent, struct au_branch *br); - -int au_lkup_dentry(struct dentry *dentry, aufs_bindex_t bstart, mode_t type); -int au_lkup_neg(struct dentry *dentry, aufs_bindex_t bindex, int wh); -int au_refresh_dentry(struct dentry *dentry, struct dentry *parent); -int au_reval_dpath(struct dentry *dentry, unsigned int sigen); -void au_refresh_dop(struct dentry *dentry, int force_reval); - -/* dinfo.c */ -void au_di_init_once(void *_di); -struct au_dinfo *au_di_alloc(struct super_block *sb, unsigned int lsc); -void au_di_free(struct au_dinfo *dinfo); -void au_di_swap(struct au_dinfo *a, struct au_dinfo *b); -void au_di_cp(struct au_dinfo *dst, struct au_dinfo *src); -int au_di_init(struct dentry *dentry); -void au_di_fin(struct dentry *dentry); -int au_di_realloc(struct au_dinfo *dinfo, int nbr); - -void di_read_lock(struct dentry *d, int flags, unsigned int lsc); -void di_read_unlock(struct dentry *d, int flags); -void di_downgrade_lock(struct dentry *d, int flags); -void di_write_lock(struct dentry *d, unsigned int lsc); -void di_write_unlock(struct dentry *d); -void di_write_lock2_child(struct dentry *d1, struct dentry *d2, int isdir); -void di_write_lock2_parent(struct dentry *d1, struct dentry *d2, int isdir); -void di_write_unlock2(struct dentry *d1, struct dentry *d2); - -struct dentry *au_h_dptr(struct dentry *dentry, aufs_bindex_t bindex); -struct dentry *au_h_d_alias(struct dentry *dentry, aufs_bindex_t bindex); -aufs_bindex_t au_dbtail(struct dentry *dentry); -aufs_bindex_t au_dbtaildir(struct dentry *dentry); - -void au_set_h_dptr(struct dentry *dentry, aufs_bindex_t bindex, - struct dentry *h_dentry); -int au_digen_test(struct dentry *dentry, unsigned int sigen); -int au_dbrange_test(struct dentry *dentry); -void au_update_digen(struct dentry *dentry); -void au_update_dbrange(struct dentry *dentry, int do_put_zero); -void au_update_dbstart(struct dentry *dentry); -void au_update_dbend(struct dentry *dentry); -int au_find_dbindex(struct dentry *dentry, struct dentry *h_dentry); - -/* ---------------------------------------------------------------------- */ - -static inline struct au_dinfo *au_di(struct dentry *dentry) -{ - return dentry->d_fsdata; -} - -/* ---------------------------------------------------------------------- */ - -/* lock subclass for dinfo */ -enum { - AuLsc_DI_CHILD, /* child first */ - AuLsc_DI_CHILD2, /* rename(2), link(2), and cpup at hnotify */ - AuLsc_DI_CHILD3, /* copyup dirs */ - AuLsc_DI_PARENT, - AuLsc_DI_PARENT2, - AuLsc_DI_PARENT3, - AuLsc_DI_TMP /* temp for replacing dinfo */ -}; - -/* - * di_read_lock_child, di_write_lock_child, - * di_read_lock_child2, di_write_lock_child2, - * di_read_lock_child3, di_write_lock_child3, - * di_read_lock_parent, di_write_lock_parent, - * di_read_lock_parent2, di_write_lock_parent2, - * di_read_lock_parent3, di_write_lock_parent3, - */ -#define AuReadLockFunc(name, lsc) \ -static inline void di_read_lock_##name(struct dentry *d, int flags) \ -{ di_read_lock(d, flags, AuLsc_DI_##lsc); } - -#define AuWriteLockFunc(name, lsc) \ -static inline void di_write_lock_##name(struct dentry *d) \ -{ di_write_lock(d, AuLsc_DI_##lsc); } - -#define AuRWLockFuncs(name, lsc) \ - AuReadLockFunc(name, lsc) \ - AuWriteLockFunc(name, lsc) - -AuRWLockFuncs(child, CHILD); -AuRWLockFuncs(child2, CHILD2); -AuRWLockFuncs(child3, CHILD3); -AuRWLockFuncs(parent, PARENT); -AuRWLockFuncs(parent2, PARENT2); -AuRWLockFuncs(parent3, PARENT3); - -#undef AuReadLockFunc -#undef AuWriteLockFunc -#undef AuRWLockFuncs - -#define DiMustNoWaiters(d) AuRwMustNoWaiters(&au_di(d)->di_rwsem) -#define DiMustAnyLock(d) AuRwMustAnyLock(&au_di(d)->di_rwsem) -#define DiMustWriteLock(d) AuRwMustWriteLock(&au_di(d)->di_rwsem) - -/* ---------------------------------------------------------------------- */ - -/* todo: memory barrier? */ -static inline unsigned int au_digen(struct dentry *d) -{ - return atomic_read(&au_di(d)->di_generation); -} - -static inline void au_h_dentry_init(struct au_hdentry *hdentry) -{ - hdentry->hd_dentry = NULL; -} - -static inline void au_hdput(struct au_hdentry *hd) -{ - if (hd) - dput(hd->hd_dentry); -} - -static inline aufs_bindex_t au_dbstart(struct dentry *dentry) -{ - DiMustAnyLock(dentry); - return au_di(dentry)->di_bstart; -} - -static inline aufs_bindex_t au_dbend(struct dentry *dentry) -{ - DiMustAnyLock(dentry); - return au_di(dentry)->di_bend; -} - -static inline aufs_bindex_t au_dbwh(struct dentry *dentry) -{ - DiMustAnyLock(dentry); - return au_di(dentry)->di_bwh; -} - -static inline aufs_bindex_t au_dbdiropq(struct dentry *dentry) -{ - DiMustAnyLock(dentry); - return au_di(dentry)->di_bdiropq; -} - -/* todo: hard/soft set? */ -static inline void au_set_dbstart(struct dentry *dentry, aufs_bindex_t bindex) -{ - DiMustWriteLock(dentry); - au_di(dentry)->di_bstart = bindex; -} - -static inline void au_set_dbend(struct dentry *dentry, aufs_bindex_t bindex) -{ - DiMustWriteLock(dentry); - au_di(dentry)->di_bend = bindex; -} - -static inline void au_set_dbwh(struct dentry *dentry, aufs_bindex_t bindex) -{ - DiMustWriteLock(dentry); - /* dbwh can be outside of bstart - bend range */ - au_di(dentry)->di_bwh = bindex; -} - -static inline void au_set_dbdiropq(struct dentry *dentry, aufs_bindex_t bindex) -{ - DiMustWriteLock(dentry); - au_di(dentry)->di_bdiropq = bindex; -} - -/* ---------------------------------------------------------------------- */ - -#ifdef CONFIG_AUFS_HNOTIFY -static inline void au_digen_dec(struct dentry *d) -{ - atomic_dec(&au_di(d)->di_generation); -} - -static inline void au_hn_di_reinit(struct dentry *dentry) -{ - dentry->d_fsdata = NULL; -} -#else -AuStubVoid(au_hn_di_reinit, struct dentry *dentry __maybe_unused) -#endif /* CONFIG_AUFS_HNOTIFY */ - -#endif /* __KERNEL__ */ -#endif /* __AUFS_DENTRY_H__ */ |