diff options
Diffstat (limited to 'ANDROID_3.4.5/fs/xfs/xfs_dquot.h')
| -rw-r--r-- | ANDROID_3.4.5/fs/xfs/xfs_dquot.h | 165 |
1 files changed, 0 insertions, 165 deletions
diff --git a/ANDROID_3.4.5/fs/xfs/xfs_dquot.h b/ANDROID_3.4.5/fs/xfs/xfs_dquot.h deleted file mode 100644 index ef9190bd..00000000 --- a/ANDROID_3.4.5/fs/xfs/xfs_dquot.h +++ /dev/null @@ -1,165 +0,0 @@ -/* - * Copyright (c) 2000-2005 Silicon Graphics, Inc. - * All Rights Reserved. - * - * This program 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. - * - * This program is distributed in the hope that it would 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, write the Free Software Foundation, - * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA - */ -#ifndef __XFS_DQUOT_H__ -#define __XFS_DQUOT_H__ - -/* - * Dquots are structures that hold quota information about a user or a group, - * much like inodes are for files. In fact, dquots share many characteristics - * with inodes. However, dquots can also be a centralized resource, relative - * to a collection of inodes. In this respect, dquots share some characteristics - * of the superblock. - * XFS dquots exploit both those in its algorithms. They make every attempt - * to not be a bottleneck when quotas are on and have minimal impact, if any, - * when quotas are off. - */ - -struct xfs_mount; -struct xfs_trans; - -/* - * The incore dquot structure - */ -typedef struct xfs_dquot { - uint dq_flags; /* various flags (XFS_DQ_*) */ - struct list_head q_lru; /* global free list of dquots */ - struct xfs_mount*q_mount; /* filesystem this relates to */ - struct xfs_trans*q_transp; /* trans this belongs to currently */ - uint q_nrefs; /* # active refs from inodes */ - xfs_daddr_t q_blkno; /* blkno of dquot buffer */ - int q_bufoffset; /* off of dq in buffer (# dquots) */ - xfs_fileoff_t q_fileoffset; /* offset in quotas file */ - - struct xfs_dquot*q_gdquot; /* group dquot, hint only */ - xfs_disk_dquot_t q_core; /* actual usage & quotas */ - xfs_dq_logitem_t q_logitem; /* dquot log item */ - xfs_qcnt_t q_res_bcount; /* total regular nblks used+reserved */ - xfs_qcnt_t q_res_icount; /* total inos allocd+reserved */ - xfs_qcnt_t q_res_rtbcount;/* total realtime blks used+reserved */ - struct mutex q_qlock; /* quota lock */ - struct completion q_flush; /* flush completion queue */ - atomic_t q_pincount; /* dquot pin count */ - wait_queue_head_t q_pinwait; /* dquot pinning wait queue */ -} xfs_dquot_t; - -/* - * Lock hierarchy for q_qlock: - * XFS_QLOCK_NORMAL is the implicit default, - * XFS_QLOCK_NESTED is the dquot with the higher id in xfs_dqlock2 - */ -enum { - XFS_QLOCK_NORMAL = 0, - XFS_QLOCK_NESTED, -}; - -/* - * Manage the q_flush completion queue embedded in the dquot. This completion - * queue synchronizes processes attempting to flush the in-core dquot back to - * disk. - */ -static inline void xfs_dqflock(xfs_dquot_t *dqp) -{ - wait_for_completion(&dqp->q_flush); -} - -static inline int xfs_dqflock_nowait(xfs_dquot_t *dqp) -{ - return try_wait_for_completion(&dqp->q_flush); -} - -static inline void xfs_dqfunlock(xfs_dquot_t *dqp) -{ - complete(&dqp->q_flush); -} - -static inline int xfs_dqlock_nowait(struct xfs_dquot *dqp) -{ - return mutex_trylock(&dqp->q_qlock); -} - -static inline void xfs_dqlock(struct xfs_dquot *dqp) -{ - mutex_lock(&dqp->q_qlock); -} - -static inline void xfs_dqunlock(struct xfs_dquot *dqp) -{ - mutex_unlock(&dqp->q_qlock); -} - -static inline int xfs_this_quota_on(struct xfs_mount *mp, int type) -{ - switch (type & XFS_DQ_ALLTYPES) { - case XFS_DQ_USER: - return XFS_IS_UQUOTA_ON(mp); - case XFS_DQ_GROUP: - case XFS_DQ_PROJ: - return XFS_IS_OQUOTA_ON(mp); - default: - return 0; - } -} - -static inline xfs_dquot_t *xfs_inode_dquot(struct xfs_inode *ip, int type) -{ - switch (type & XFS_DQ_ALLTYPES) { - case XFS_DQ_USER: - return ip->i_udquot; - case XFS_DQ_GROUP: - case XFS_DQ_PROJ: - return ip->i_gdquot; - default: - return NULL; - } -} - -#define XFS_DQ_IS_LOCKED(dqp) (mutex_is_locked(&((dqp)->q_qlock))) -#define XFS_DQ_IS_DIRTY(dqp) ((dqp)->dq_flags & XFS_DQ_DIRTY) -#define XFS_QM_ISUDQ(dqp) ((dqp)->dq_flags & XFS_DQ_USER) -#define XFS_QM_ISPDQ(dqp) ((dqp)->dq_flags & XFS_DQ_PROJ) -#define XFS_QM_ISGDQ(dqp) ((dqp)->dq_flags & XFS_DQ_GROUP) -#define XFS_DQ_TO_QINF(dqp) ((dqp)->q_mount->m_quotainfo) -#define XFS_DQ_TO_QIP(dqp) (XFS_QM_ISUDQ(dqp) ? \ - XFS_DQ_TO_QINF(dqp)->qi_uquotaip : \ - XFS_DQ_TO_QINF(dqp)->qi_gquotaip) - -extern int xfs_qm_dqread(struct xfs_mount *, xfs_dqid_t, uint, - uint, struct xfs_dquot **); -extern void xfs_qm_dqdestroy(xfs_dquot_t *); -extern int xfs_qm_dqflush(xfs_dquot_t *, uint); -extern void xfs_qm_dqunpin_wait(xfs_dquot_t *); -extern void xfs_qm_adjust_dqtimers(xfs_mount_t *, - xfs_disk_dquot_t *); -extern void xfs_qm_adjust_dqlimits(xfs_mount_t *, - xfs_disk_dquot_t *); -extern int xfs_qm_dqget(xfs_mount_t *, xfs_inode_t *, - xfs_dqid_t, uint, uint, xfs_dquot_t **); -extern void xfs_qm_dqput(xfs_dquot_t *); - -extern void xfs_dqlock2(struct xfs_dquot *, struct xfs_dquot *); -extern void xfs_dqflock_pushbuf_wait(struct xfs_dquot *dqp); - -static inline struct xfs_dquot *xfs_qm_dqhold(struct xfs_dquot *dqp) -{ - xfs_dqlock(dqp); - dqp->q_nrefs++; - xfs_dqunlock(dqp); - return dqp; -} - -#endif /* __XFS_DQUOT_H__ */ |