http://www.ousob.com --- Legacy Redefined OuSob - File: /wwwroot/clipx/usr/include/xfs/xfs_inode.h

/* * 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__ /* * Fork identifiers. */ #define XFS_DATA_FORK 0 #define XFS_ATTR_FORK 1 /* * File incore extent information, present for each of data & attr forks. */ #define XFS_INLINE_EXTS 2 #define XFS_INLINE_DATA 32 typedef struct xfs_ifork { int if_bytes; /* bytes in if_u1 */ int if_real_bytes; /* bytes allocated in if_u1 */ xfs_bmbt_block_t *if_broot; /* file's incore btree root */ short if_broot_bytes; /* bytes allocated for root */ unsigned char if_flags; /* per-fork flags */ unsigned char if_ext_max; /* max # of extent records */ xfs_extnum_t if_lastex; /* last if_extents used */ union { xfs_bmbt_rec_t *if_extents; /* linear map file exts */ char *if_data; /* inline file data */ } if_u1; union { xfs_bmbt_rec_t if_inline_ext[XFS_INLINE_EXTS]; /* very small file extents */ char if_inline_data[XFS_INLINE_DATA]; /* very small file data */ xfs_dev_t if_rdev; /* dev number if special */ uuid_t if_uuid; /* mount point value */ } if_u2; } xfs_ifork_t; /* * Flags for xfs_ichgtime(). */ #define XFS_ICHGTIME_MOD 0x1 /* data fork modification timestamp */ #define XFS_ICHGTIME_ACC 0x2 /* data fork access timestamp */ #define XFS_ICHGTIME_CHG 0x4 /* inode field change timestamp */ /* * Per-fork incore inode flags. */ #define XFS_IFINLINE 0x0001 /* Inline data is read in */ #define XFS_IFEXTENTS 0x0002 /* All extent pointers are read in */ #define XFS_IFBROOT 0x0004 /* i_broot points to the bmap b-tree root */ /* * Flags for xfs_imap() and xfs_dilocate(). */ #define XFS_IMAP_LOOKUP 0x1 /* * Maximum number of extent pointers in if_u1.if_extents. */ #define XFS_MAX_INCORE_EXTENTS 32768 #ifdef __KERNEL__ struct bhv_desc; struct cred; struct ktrace; struct vnode; struct xfs_buf; struct xfs_bmap_free; struct xfs_bmbt_irec; struct xfs_bmbt_block; struct xfs_inode; struct xfs_inode_log_item; struct xfs_mount; struct xfs_trans; struct xfs_dquot; #if defined(XFS_ILOCK_TRACE) #define XFS_ILOCK_KTRACE_SIZE 32 extern ktrace_t *xfs_ilock_trace_buf; extern void xfs_ilock_trace(struct xfs_inode *, int, unsigned int, inst_t *); #else #define xfs_ilock_trace(i,n,f,ra) #endif typedef struct dm_attrs_s { __uint32_t da_dmevmask; /* DMIG event mask */ __uint16_t da_dmstate; /* DMIG state info */ __uint16_t da_pad; /* DMIG extra padding */ } dm_attrs_t; typedef struct xfs_iocore { void *io_obj; /* pointer to container * inode or dcxvn structure */ struct xfs_mount *io_mount; /* fs mount struct ptr */ #ifdef DEBUG mrlock_t *io_lock; /* inode IO lock */ mrlock_t *io_iolock; /* inode IO lock */ #endif /* I/O state */ xfs_fsize_t io_new_size; /* sz when write completes */ /* Miscellaneous state. */ unsigned int io_flags; /* IO related flags */ /* DMAPI state */ dm_attrs_t io_dmattrs; } xfs_iocore_t; #define io_dmevmask io_dmattrs.da_dmevmask #define io_dmstate io_dmattrs.da_dmstate #define XFS_IO_INODE(io) ((xfs_inode_t *) ((io)->io_obj)) #define XFS_IO_DCXVN(io) ((dcxvn_t *) ((io)->io_obj)) /* * Flags in the flags field */ #define XFS_IOCORE_RT 0x1 /* * xfs_iocore prototypes */ extern void xfs_iocore_inode_init(struct xfs_inode *); extern void xfs_iocore_inode_reinit(struct xfs_inode *); /* * This is the type used in the xfs inode hash table. * An array of these is allocated for each mounted * file system to hash the inodes for that file system. */ typedef struct xfs_ihash { struct xfs_inode *ih_next; rwlock_t ih_lock; uint ih_version; } xfs_ihash_t; #define XFS_IHASH(mp,ino) ((mp)->m_ihash + (((uint)(ino)) % (mp)->m_ihsize)) /* * This is the xfs inode cluster hash. This hash is used by xfs_iflush to * find inodes that share a cluster and can be flushed to disk at the same * time. */ typedef struct xfs_chashlist { struct xfs_chashlist *chl_next; struct xfs_inode *chl_ip; xfs_daddr_t chl_blkno; /* starting block number of * the cluster */ struct xfs_buf *chl_buf; /* the inode buffer */ } xfs_chashlist_t; typedef struct xfs_chash { xfs_chashlist_t *ch_list; lock_t ch_lock; } xfs_chash_t; #define XFS_CHASH(mp,blk) ((mp)->m_chash + (((uint)blk) % (mp)->m_chsize)) /* * This is the xfs in-core inode structure. * Most of the on-disk inode is embedded in the i_d field. * * The extent pointers/inline file space, however, are managed * separately. The memory for this information is pointed to by * the if_u1 unions depending on the type of the data. * This is used to linearize the array of extents for fast in-core * access. This is used until the file's number of extents * surpasses XFS_MAX_INCORE_EXTENTS, at which point all extent pointers * are accessed through the buffer cache. * * Other state kept in the in-core inode is used for identification, * locking, transactional updating, etc of the inode. * * Generally, we do not want to hold the i_rlock while holding the * i_ilock. Hierarchy is i_iolock followed by i_rlock. * * xfs_iptr_t contains all the inode fields upto and including the * i_mnext and i_mprev fields, it is used as a marker in the inode * chain off the mount structure by xfs_sync calls. */ typedef struct { struct xfs_ihash *ip_hash; /* pointer to hash header */ struct xfs_inode *ip_next; /* inode hash link forw */ struct xfs_inode *ip_mnext; /* next inode in mount list */ struct xfs_inode *ip_mprev; /* ptr to prev inode */ struct xfs_inode **ip_prevp; /* ptr to prev i_next */ struct xfs_mount *ip_mount; /* fs mount struct ptr */ } xfs_iptr_t; typedef struct xfs_inode { /* Inode linking and identification information. */ struct xfs_ihash *i_hash; /* pointer to hash header */ struct xfs_inode *i_next; /* inode hash link forw */ struct xfs_inode *i_mnext; /* next inode in mount list */ struct xfs_inode *i_mprev; /* ptr to prev inode */ struct xfs_inode **i_prevp; /* ptr to prev i_next */ struct xfs_mount *i_mount; /* fs mount struct ptr */ struct list_head i_reclaim; /* reclaim list */ struct bhv_desc i_bhv_desc; /* inode behavior descriptor*/ 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)*/ xfs_daddr_t i_blkno; /* blkno of inode buffer */ ushort i_len; /* len of inode buffer */ ushort i_boffset; /* off of inode in buffer */ /* Extent information. */ xfs_ifork_t *i_afp; /* attribute fork pointer */ xfs_ifork_t i_df; /* data fork */ /* Transaction and locking information. */ struct xfs_trans *i_transp; /* ptr to owning transaction*/ struct xfs_inode_log_item *i_itemp; /* logging information */ mrlock_t i_lock; /* inode lock */ mrlock_t i_iolock; /* inode IO lock */ sema_t i_flock; /* inode flush lock */ atomic_t i_pincount; /* inode pin count */ wait_queue_head_t i_ipin_wait; /* inode pinning wait queue */ #ifdef HAVE_REFCACHE struct xfs_inode **i_refcache; /* ptr to entry in ref cache */ struct xfs_inode *i_release; /* inode to unref */ #endif /* I/O state */ xfs_iocore_t i_iocore; /* I/O core */ /* Miscellaneous state. */ unsigned short i_flags; /* see defined flags below */ unsigned char i_update_core; /* timestamps/size is dirty */ unsigned char i_update_size; /* di_size field is dirty */ unsigned int i_gen; /* generation count */ unsigned int i_delayed_blks; /* count of delay alloc blks */ xfs_dinode_core_t i_d; /* most of ondisk inode */ xfs_chashlist_t *i_chash; /* cluster hash list header */ struct xfs_inode *i_cnext; /* cluster hash link forward */ struct xfs_inode *i_cprev; /* cluster hash link backward */ /* Trace buffers per inode. */ #ifdef XFS_BMAP_TRACE struct ktrace *i_xtrace; /* inode extent list trace */ #endif #ifdef XFS_BMBT_TRACE struct ktrace *i_btrace; /* inode bmap btree trace */ #endif #ifdef XFS_RW_TRACE struct ktrace *i_rwtrace; /* inode read/write trace */ #endif #ifdef XFS_ILOCK_TRACE struct ktrace *i_lock_trace; /* inode lock/unlock trace */ #endif #ifdef XFS_DIR2_TRACE struct ktrace *i_dir_trace; /* inode directory trace */ #endif } xfs_inode_t; #endif /* __KERNEL__ */ /* * Fork handling. */ #define XFS_IFORK_PTR(ip,w) \ ((w) == XFS_DATA_FORK ? &(ip)->i_df : (ip)->i_afp) #define XFS_IFORK_Q(ip) XFS_CFORK_Q(&(ip)->i_d) #define XFS_IFORK_DSIZE(ip) XFS_CFORK_DSIZE(&ip->i_d, ip->i_mount) #define XFS_IFORK_ASIZE(ip) XFS_CFORK_ASIZE(&ip->i_d, ip->i_mount) #define XFS_IFORK_SIZE(ip,w) XFS_CFORK_SIZE(&ip->i_d, ip->i_mount, w) #define XFS_IFORK_FORMAT(ip,w) XFS_CFORK_FORMAT(&ip->i_d, w) #define XFS_IFORK_FMT_SET(ip,w,n) XFS_CFORK_FMT_SET(&ip->i_d, w, n) #define XFS_IFORK_NEXTENTS(ip,w) XFS_CFORK_NEXTENTS(&ip->i_d, w) #define XFS_IFORK_NEXT_SET(ip,w,n) XFS_CFORK_NEXT_SET(&ip->i_d, w, n) #ifdef __KERNEL__ /* * In-core inode flags. */ #define XFS_IGRIO 0x0001 /* inode used for guaranteed rate i/o */ #define XFS_IUIOSZ 0x0002 /* inode i/o sizes have been explicitly set */ #define XFS_IQUIESCE 0x0004 /* we have started quiescing for this inode */ #define XFS_IRECLAIM 0x0008 /* we have started reclaiming this inode */ #define XFS_ISTALE 0x0010 /* inode has been staled */ #define XFS_IRECLAIMABLE 0x0020 /* inode can be reclaimed */ #define XFS_INEW 0x0040 /* * Flags for inode locking. */ #define XFS_IOLOCK_EXCL 0x001 #define XFS_IOLOCK_SHARED 0x002 #define XFS_ILOCK_EXCL 0x004 #define XFS_ILOCK_SHARED 0x008 #define XFS_IUNLOCK_NONOTIFY 0x010 /* XFS_IOLOCK_NESTED 0x020 */ #define XFS_EXTENT_TOKEN_RD 0x040 #define XFS_SIZE_TOKEN_RD 0x080 #define XFS_EXTSIZE_RD (XFS_EXTENT_TOKEN_RD|XFS_SIZE_TOKEN_RD) #define XFS_WILLLEND 0x100 /* Always acquire tokens for lending */ #define XFS_EXTENT_TOKEN_WR (XFS_EXTENT_TOKEN_RD | XFS_WILLLEND) #define XFS_SIZE_TOKEN_WR (XFS_SIZE_TOKEN_RD | XFS_WILLLEND) #define XFS_EXTSIZE_WR (XFS_EXTSIZE_RD | XFS_WILLLEND) /* XFS_SIZE_TOKEN_WANT 0x200 */ #define XFS_LOCK_MASK \ (XFS_IOLOCK_EXCL | XFS_IOLOCK_SHARED | XFS_ILOCK_EXCL | \ XFS_ILOCK_SHARED | XFS_EXTENT_TOKEN_RD | XFS_SIZE_TOKEN_RD | \ XFS_WILLLEND) /* * Flags for xfs_iflush() */ #define XFS_IFLUSH_DELWRI_ELSE_SYNC 1 #define XFS_IFLUSH_DELWRI_ELSE_ASYNC 2 #define XFS_IFLUSH_SYNC 3 #define XFS_IFLUSH_ASYNC 4 #define XFS_IFLUSH_DELWRI 5 /* * Flags for xfs_itruncate_start(). */ #define XFS_ITRUNC_DEFINITE 0x1 #define XFS_ITRUNC_MAYBE 0x2 #define XFS_ITOV(ip) BHV_TO_VNODE(XFS_ITOBHV(ip)) #define XFS_ITOV_NULL(ip) BHV_TO_VNODE_NULL(XFS_ITOBHV(ip)) #define XFS_ITOBHV(ip) ((struct bhv_desc *)(&((ip)->i_bhv_desc))) #define XFS_BHVTOI(bhvp) ((xfs_inode_t *)((char *)(bhvp) - \ (char *)&(((xfs_inode_t *)0)->i_bhv_desc))) #define BHV_IS_XFS(bdp) (BHV_OPS(bdp) == &xfs_vnodeops) /* * 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, vfsp) \ (((vfsp)->vfs_flag & VFS_GRPID) || ((pip)->i_d.di_mode & S_ISGID)) /* * xfs_iget.c prototypes. */ #define IGET_CREATE 1 void xfs_ihash_init(struct xfs_mount *); void xfs_ihash_free(struct xfs_mount *); void xfs_chash_init(struct xfs_mount *); void xfs_chash_free(struct xfs_mount *); xfs_inode_t *xfs_inode_incore(struct xfs_mount *, xfs_ino_t, struct xfs_trans *); void xfs_inode_lock_init(xfs_inode_t *, struct vnode *); int xfs_iget(struct xfs_mount *, struct xfs_trans *, xfs_ino_t, uint, uint, xfs_inode_t **, xfs_daddr_t); void xfs_iput(xfs_inode_t *, uint); void xfs_iput_new(xfs_inode_t *, uint); 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); void xfs_iflock(xfs_inode_t *); int xfs_iflock_nowait(xfs_inode_t *); uint xfs_ilock_map_shared(xfs_inode_t *); void xfs_iunlock_map_shared(xfs_inode_t *, uint); void xfs_ifunlock(xfs_inode_t *); void xfs_ireclaim(xfs_inode_t *); int xfs_finish_reclaim(xfs_inode_t *, int, int); int xfs_finish_reclaim_all(struct xfs_mount *, int); /* * xfs_inode.c prototypes. */ int xfs_itobp(struct xfs_mount *, struct xfs_trans *, xfs_inode_t *, xfs_dinode_t **, struct xfs_buf **, xfs_daddr_t); int xfs_iread(struct xfs_mount *, struct xfs_trans *, xfs_ino_t, xfs_inode_t **, xfs_daddr_t); int xfs_iread_extents(struct xfs_trans *, xfs_inode_t *, int); int xfs_ialloc(struct xfs_trans *, xfs_inode_t *, mode_t, xfs_nlink_t, xfs_dev_t, struct cred *, xfs_prid_t, int, struct xfs_buf **, boolean_t *, xfs_inode_t **); void xfs_xlate_dinode_core(xfs_caddr_t, struct xfs_dinode_core *, int); uint xfs_ip2xflags(struct xfs_inode *); uint xfs_dic2xflags(struct xfs_dinode_core *); int xfs_ifree(struct xfs_trans *, xfs_inode_t *, struct xfs_bmap_free *); void xfs_itruncate_start(xfs_inode_t *, uint, xfs_fsize_t); int xfs_itruncate_finish(struct xfs_trans **, xfs_inode_t *, xfs_fsize_t, int, int); int xfs_iunlink(struct xfs_trans *, xfs_inode_t *); int xfs_igrow_start(xfs_inode_t *, xfs_fsize_t, struct cred *); void xfs_igrow_finish(struct xfs_trans *, xfs_inode_t *, xfs_fsize_t, int); void xfs_idestroy_fork(xfs_inode_t *, int); void xfs_idestroy(xfs_inode_t *); void xfs_idata_realloc(xfs_inode_t *, int, int); void xfs_iextract(xfs_inode_t *); void xfs_iext_realloc(xfs_inode_t *, int, int); void xfs_iroot_realloc(xfs_inode_t *, int, int); void xfs_ipin(xfs_inode_t *); void xfs_iunpin(xfs_inode_t *); int xfs_iextents_copy(xfs_inode_t *, xfs_bmbt_rec_t *, int); int xfs_iflush(xfs_inode_t *, uint); void xfs_iflush_all(struct xfs_mount *); int xfs_iaccess(xfs_inode_t *, mode_t, cred_t *); uint xfs_iroundup(uint); void xfs_ichgtime(xfs_inode_t *, int); xfs_fsize_t xfs_file_last_byte(xfs_inode_t *); void xfs_lock_inodes(xfs_inode_t **, int, int, uint); #define xfs_ipincount(ip) ((unsigned int) atomic_read(&ip->i_pincount)) #ifdef DEBUG void xfs_isize_check(struct xfs_mount *, xfs_inode_t *, xfs_fsize_t); #else /* DEBUG */ #define xfs_isize_check(mp, ip, isize) #endif /* DEBUG */ #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_chashlist_zone; extern struct kmem_zone *xfs_ifork_zone; extern struct kmem_zone *xfs_inode_zone; extern struct kmem_zone *xfs_ili_zone; extern struct vnodeops xfs_vnodeops; #endif /* __KERNEL__ */ #endif /* __XFS_INODE_H__ */