+++ /dev/null
-/*
- * Copyright (c) 2000-2003,2005 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_INODE_H__
-#define __XFS_INODE_H__
-
-struct posix_acl;
-struct xfs_dinode;
-struct xfs_inode;
-
-#include "xfs_inode_fork.h"
-
-/*
- * Inode location information. Stored in the inode and passed to
- * xfs_imap_to_bp() to get a buffer and dinode for a given inode.
- */
-struct xfs_imap {
- xfs_daddr_t im_blkno; /* starting BB of inode chunk */
- ushort im_len; /* length in BBs of inode chunk */
- ushort im_boffset; /* inode offset in block in bytes */
-};
-
-
-#ifdef __KERNEL__
-
-struct xfs_buf;
-struct xfs_bmap_free;
-struct xfs_bmbt_irec;
-struct xfs_inode_log_item;
-struct xfs_mount;
-struct xfs_trans;
-struct xfs_dquot;
-
-typedef struct xfs_inode {
- /* Inode linking and identification information. */
- struct xfs_mount *i_mount; /* fs mount struct ptr */
- struct xfs_dquot *i_udquot; /* user dquot */
- struct xfs_dquot *i_gdquot; /* group dquot */
-
- /* Inode location stuff */
- xfs_ino_t i_ino; /* inode number (agno/agino)*/
- struct xfs_imap i_imap; /* location for xfs_imap() */
-
- /* Extent information. */
- xfs_ifork_t *i_afp; /* attribute fork pointer */
- xfs_ifork_t i_df; /* data fork */
-
- /* Transaction and locking information. */
- struct xfs_inode_log_item *i_itemp; /* logging information */
- mrlock_t i_lock; /* inode lock */
- mrlock_t i_iolock; /* inode IO lock */
- atomic_t i_pincount; /* inode pin count */
- spinlock_t i_flags_lock; /* inode i_flags lock */
- /* Miscellaneous state. */
- unsigned long i_flags; /* see defined flags below */
- unsigned int i_delayed_blks; /* count of delay alloc blks */
-
- xfs_icdinode_t i_d; /* most of ondisk inode */
-
- /* VFS inode */
- struct inode i_vnode; /* embedded VFS inode */
-} xfs_inode_t;
-
-/* Convert from vfs inode to xfs inode */
-static inline struct xfs_inode *XFS_I(struct inode *inode)
-{
- return container_of(inode, struct xfs_inode, i_vnode);
-}
-
-/* convert from xfs inode to vfs inode */
-static inline struct inode *VFS_I(struct xfs_inode *ip)
-{
- return &ip->i_vnode;
-}
-
-/*
- * For regular files we only update the on-disk filesize when actually
- * writing data back to disk. Until then only the copy in the VFS inode
- * is uptodate.
- */
-static inline xfs_fsize_t XFS_ISIZE(struct xfs_inode *ip)
-{
- if (S_ISREG(ip->i_d.di_mode))
- return i_size_read(VFS_I(ip));
- return ip->i_d.di_size;
-}
-
-/*
- * If this I/O goes past the on-disk inode size update it unless it would
- * be past the current in-core inode size.
- */
-static inline xfs_fsize_t
-xfs_new_eof(struct xfs_inode *ip, xfs_fsize_t new_size)
-{
- xfs_fsize_t i_size = i_size_read(VFS_I(ip));
-
- if (new_size > i_size)
- new_size = i_size;
- return new_size > ip->i_d.di_size ? new_size : 0;
-}
-
-/*
- * i_flags helper functions
- */
-static inline void
-__xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
-{
- ip->i_flags |= flags;
-}
-
-static inline void
-xfs_iflags_set(xfs_inode_t *ip, unsigned short flags)
-{
- spin_lock(&ip->i_flags_lock);
- __xfs_iflags_set(ip, flags);
- spin_unlock(&ip->i_flags_lock);
-}
-
-static inline void
-xfs_iflags_clear(xfs_inode_t *ip, unsigned short flags)
-{
- spin_lock(&ip->i_flags_lock);
- ip->i_flags &= ~flags;
- spin_unlock(&ip->i_flags_lock);
-}
-
-static inline int
-__xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
-{
- return (ip->i_flags & flags);
-}
-
-static inline int
-xfs_iflags_test(xfs_inode_t *ip, unsigned short flags)
-{
- int ret;
- spin_lock(&ip->i_flags_lock);
- ret = __xfs_iflags_test(ip, flags);
- spin_unlock(&ip->i_flags_lock);
- return ret;
-}
-
-static inline int
-xfs_iflags_test_and_clear(xfs_inode_t *ip, unsigned short flags)
-{
- int ret;
-
- spin_lock(&ip->i_flags_lock);
- ret = ip->i_flags & flags;
- if (ret)
- ip->i_flags &= ~flags;
- spin_unlock(&ip->i_flags_lock);
- return ret;
-}
-
-static inline int
-xfs_iflags_test_and_set(xfs_inode_t *ip, unsigned short flags)
-{
- int ret;
-
- spin_lock(&ip->i_flags_lock);
- ret = ip->i_flags & flags;
- if (!ret)
- ip->i_flags |= flags;
- spin_unlock(&ip->i_flags_lock);
- return ret;
-}
-
-/*
- * Project quota id helpers (previously projid was 16bit only
- * and using two 16bit values to hold new 32bit projid was chosen
- * to retain compatibility with "old" filesystems).
- */
-static inline prid_t
-xfs_get_projid(struct xfs_inode *ip)
-{
- return (prid_t)ip->i_d.di_projid_hi << 16 | ip->i_d.di_projid_lo;
-}
-
-static inline void
-xfs_set_projid(struct xfs_inode *ip,
- prid_t projid)
-{
- ip->i_d.di_projid_hi = (__uint16_t) (projid >> 16);
- ip->i_d.di_projid_lo = (__uint16_t) (projid & 0xffff);
-}
-
-/*
- * In-core inode flags.
- */
-#define XFS_IRECLAIM (1 << 0) /* started reclaiming this inode */
-#define XFS_ISTALE (1 << 1) /* inode has been staled */
-#define XFS_IRECLAIMABLE (1 << 2) /* inode can be reclaimed */
-#define XFS_INEW (1 << 3) /* inode has just been allocated */
-#define XFS_IFILESTREAM (1 << 4) /* inode is in a filestream dir. */
-#define XFS_ITRUNCATED (1 << 5) /* truncated down so flush-on-close */
-#define XFS_IDIRTY_RELEASE (1 << 6) /* dirty release already seen */
-#define __XFS_IFLOCK_BIT 7 /* inode is being flushed right now */
-#define XFS_IFLOCK (1 << __XFS_IFLOCK_BIT)
-#define __XFS_IPINNED_BIT 8 /* wakeup key for zero pin count */
-#define XFS_IPINNED (1 << __XFS_IPINNED_BIT)
-#define XFS_IDONTCACHE (1 << 9) /* don't cache the inode long term */
-
-/*
- * Per-lifetime flags need to be reset when re-using a reclaimable inode during
- * inode lookup. This prevents unintended behaviour on the new inode from
- * ocurring.
- */
-#define XFS_IRECLAIM_RESET_FLAGS \
- (XFS_IRECLAIMABLE | XFS_IRECLAIM | \
- XFS_IDIRTY_RELEASE | XFS_ITRUNCATED | \
- XFS_IFILESTREAM);
-
-/*
- * Synchronize processes attempting to flush the in-core inode back to disk.
- */
-
-extern void __xfs_iflock(struct xfs_inode *ip);
-
-static inline int xfs_iflock_nowait(struct xfs_inode *ip)
-{
- return !xfs_iflags_test_and_set(ip, XFS_IFLOCK);
-}
-
-static inline void xfs_iflock(struct xfs_inode *ip)
-{
- if (!xfs_iflock_nowait(ip))
- __xfs_iflock(ip);
-}
-
-static inline void xfs_ifunlock(struct xfs_inode *ip)
-{
- xfs_iflags_clear(ip, XFS_IFLOCK);
- smp_mb();
- wake_up_bit(&ip->i_flags, __XFS_IFLOCK_BIT);
-}
-
-static inline int xfs_isiflocked(struct xfs_inode *ip)
-{
- return xfs_iflags_test(ip, XFS_IFLOCK);
-}
-
-/*
- * Flags for inode locking.
- * Bit ranges: 1<<1 - 1<<16-1 -- iolock/ilock modes (bitfield)
- * 1<<16 - 1<<32-1 -- lockdep annotation (integers)
- */
-#define XFS_IOLOCK_EXCL (1<<0)
-#define XFS_IOLOCK_SHARED (1<<1)
-#define XFS_ILOCK_EXCL (1<<2)
-#define XFS_ILOCK_SHARED (1<<3)
-
-#define XFS_LOCK_MASK (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED \
- | XFS_ILOCK_EXCL | XFS_ILOCK_SHARED)
-
-#define XFS_LOCK_FLAGS \
- { XFS_IOLOCK_EXCL, "IOLOCK_EXCL" }, \
- { XFS_IOLOCK_SHARED, "IOLOCK_SHARED" }, \
- { XFS_ILOCK_EXCL, "ILOCK_EXCL" }, \
- { XFS_ILOCK_SHARED, "ILOCK_SHARED" }
-
-
-/*
- * Flags for lockdep annotations.
- *
- * XFS_LOCK_PARENT - for directory operations that require locking a
- * parent directory inode and a child entry inode. The parent gets locked
- * with this flag so it gets a lockdep subclass of 1 and the child entry
- * lock will have a lockdep subclass of 0.
- *
- * XFS_LOCK_RTBITMAP/XFS_LOCK_RTSUM - the realtime device bitmap and summary
- * inodes do not participate in the normal lock order, and thus have their
- * own subclasses.
- *
- * XFS_LOCK_INUMORDER - for locking several inodes at the some time
- * with xfs_lock_inodes(). This flag is used as the starting subclass
- * and each subsequent lock acquired will increment the subclass by one.
- * So the first lock acquired will have a lockdep subclass of 4, the
- * second lock will have a lockdep subclass of 5, and so on. It is
- * the responsibility of the class builder to shift this to the correct
- * portion of the lock_mode lockdep mask.
- */
-#define XFS_LOCK_PARENT 1
-#define XFS_LOCK_RTBITMAP 2
-#define XFS_LOCK_RTSUM 3
-#define XFS_LOCK_INUMORDER 4
-
-#define XFS_IOLOCK_SHIFT 16
-#define XFS_IOLOCK_PARENT (XFS_LOCK_PARENT << XFS_IOLOCK_SHIFT)
-
-#define XFS_ILOCK_SHIFT 24
-#define XFS_ILOCK_PARENT (XFS_LOCK_PARENT << XFS_ILOCK_SHIFT)
-#define XFS_ILOCK_RTBITMAP (XFS_LOCK_RTBITMAP << XFS_ILOCK_SHIFT)
-#define XFS_ILOCK_RTSUM (XFS_LOCK_RTSUM << XFS_ILOCK_SHIFT)
-
-#define XFS_IOLOCK_DEP_MASK 0x00ff0000
-#define XFS_ILOCK_DEP_MASK 0xff000000
-#define XFS_LOCK_DEP_MASK (XFS_IOLOCK_DEP_MASK | XFS_ILOCK_DEP_MASK)
-
-#define XFS_IOLOCK_DEP(flags) (((flags) & XFS_IOLOCK_DEP_MASK) >> XFS_IOLOCK_SHIFT)
-#define XFS_ILOCK_DEP(flags) (((flags) & XFS_ILOCK_DEP_MASK) >> XFS_ILOCK_SHIFT)
-
-/*
- * For multiple groups support: if S_ISGID bit is set in the parent
- * directory, group of new file is set to that of the parent, and
- * new subdirectory gets S_ISGID bit from parent.
- */
-#define XFS_INHERIT_GID(pip) \
- (((pip)->i_mount->m_flags & XFS_MOUNT_GRPID) || \
- ((pip)->i_d.di_mode & S_ISGID))
-
-
-/*
- * xfs_inode.c prototypes.
- */
-void xfs_ilock(xfs_inode_t *, uint);
-int xfs_ilock_nowait(xfs_inode_t *, uint);
-void xfs_iunlock(xfs_inode_t *, uint);
-void xfs_ilock_demote(xfs_inode_t *, uint);
-int xfs_isilocked(xfs_inode_t *, uint);
-uint xfs_ilock_map_shared(xfs_inode_t *);
-void xfs_iunlock_map_shared(xfs_inode_t *, uint);
-int xfs_ialloc(struct xfs_trans *, xfs_inode_t *, umode_t,
- xfs_nlink_t, xfs_dev_t, prid_t, int,
- struct xfs_buf **, xfs_inode_t **);
-
-uint xfs_ip2xflags(struct xfs_inode *);
-uint xfs_dic2xflags(struct xfs_dinode *);
-int xfs_ifree(struct xfs_trans *, xfs_inode_t *,
- struct xfs_bmap_free *);
-int xfs_itruncate_extents(struct xfs_trans **, struct xfs_inode *,
- int, xfs_fsize_t);
-int xfs_iunlink(struct xfs_trans *, xfs_inode_t *);
-
-void xfs_iext_realloc(xfs_inode_t *, int, int);
-void xfs_iunpin_wait(xfs_inode_t *);
-int xfs_iflush(struct xfs_inode *, struct xfs_buf **);
-void xfs_lock_inodes(xfs_inode_t **, int, uint);
-void xfs_lock_two_inodes(xfs_inode_t *, xfs_inode_t *, uint);
-
-xfs_extlen_t xfs_get_extsz_hint(struct xfs_inode *ip);
-
-#define IHOLD(ip) \
-do { \
- ASSERT(atomic_read(&VFS_I(ip)->i_count) > 0) ; \
- ihold(VFS_I(ip)); \
- trace_xfs_ihold(ip, _THIS_IP_); \
-} while (0)
-
-#define IRELE(ip) \
-do { \
- trace_xfs_irele(ip, _THIS_IP_); \
- iput(VFS_I(ip)); \
-} while (0)
-
-#endif /* __KERNEL__ */
-
-int xfs_imap_to_bp(struct xfs_mount *, struct xfs_trans *,
- struct xfs_imap *, struct xfs_dinode **,
- struct xfs_buf **, uint, uint);
-int xfs_iread(struct xfs_mount *, struct xfs_trans *,
- struct xfs_inode *, uint);
-void xfs_dinode_calc_crc(struct xfs_mount *, struct xfs_dinode *);
-void xfs_dinode_to_disk(struct xfs_dinode *,
- struct xfs_icdinode *);
-bool xfs_can_free_eofblocks(struct xfs_inode *, bool);
-
-#define xfs_ipincount(ip) ((unsigned int) atomic_read(&ip->i_pincount))
-
-#if defined(DEBUG)
-void xfs_inobp_check(struct xfs_mount *, struct xfs_buf *);
-#else
-#define xfs_inobp_check(mp, bp)
-#endif /* DEBUG */
-
-extern struct kmem_zone *xfs_inode_zone;
-extern const struct xfs_buf_ops xfs_inode_buf_ops;
-
-#endif /* __XFS_INODE_H__ */
projects / thirdparty / xfsprogs-dev.git / commitdiff
