/*
- * Copyright (c) 2000-2003 Silicon Graphics, Inc. All Rights Reserved.
+ * 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 version 2 of the GNU General Public License as
+ * 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.
+ * 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.
*
- * Further, this software is distributed without any warranty that it is
- * free of the rightful claim of any third person regarding infringement
- * or the like. Any license provided herein, whether implied or
- * otherwise, applies only to this software file. Patent licenses, if
- * any, provided herein do not apply to combinations of this program with
- * other software, or any other product whatsoever.
- *
- * You should have received a copy of the GNU General Public License along
- * with this program; if not, write the Free Software Foundation, Inc., 59
- * Temple Place - Suite 330, Boston MA 02111-1307, USA.
- *
- * Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
- * Mountain View, CA 94043, or:
- *
- * http://www.sgi.com
- *
- * For further information regarding this notice, see:
- *
- * http://oss.sgi.com/projects/GenInfo/SGIGPLNoticeExplan/
+ * 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
+
+/*
+ * The following xfs_ext_irec_t struct introduces a second (top) level
+ * to the in-core extent allocation scheme. These structs are allocated
+ * in a contiguous block, creating an indirection array where each entry
+ * (irec) contains a pointer to a buffer of in-core extent records which
+ * it manages. Each extent buffer is 4k in size, since 4k is the system
+ * page size on Linux i386 and systems with larger page sizes don't seem
+ * to gain much, if anything, by using their native page size as the
+ * extent buffer size. Also, using 4k extent buffers everywhere provides
+ * a consistent interface for CXFS across different platforms.
+ *
+ * There is currently no limit on the number of irec's (extent lists)
+ * allowed, so heavily fragmented files may require an indirection array
+ * which spans multiple system pages of memory. The number of extents
+ * which would require this amount of contiguous memory is very large
+ * and should not cause problems in the foreseeable future. However,
+ * if the memory needed for the contiguous array ever becomes a problem,
+ * it is possible that a third level of indirection may be required.
+ */
+typedef struct xfs_ext_irec {
+ xfs_bmbt_rec_t *er_extbuf; /* block of extent records */
+ xfs_extnum_t er_extoff; /* extent offset in file */
+ xfs_extnum_t er_extcount; /* number of extents in page/block */
+} xfs_ext_irec_t;
+
/*
* File incore extent information, present for each of data & attr forks.
*/
-#define XFS_INLINE_EXTS 2
-#define XFS_INLINE_DATA 32
+#define XFS_IEXT_BUFSZ 4096
+#define XFS_LINEAR_EXTS (XFS_IEXT_BUFSZ / (uint)sizeof(xfs_bmbt_rec_t))
+#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_extnum_t if_lastex; /* last if_extents used */
union {
xfs_bmbt_rec_t *if_extents; /* linear map file exts */
+ xfs_ext_irec_t *if_ext_irec; /* irec map file exts */
char *if_data; /* inline file data */
} if_u1;
union {
/*
* 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 */
+#define XFS_IFINLINE 0x01 /* Inline data is read in */
+#define XFS_IFEXTENTS 0x02 /* All extent pointers are read in */
+#define XFS_IFBROOT 0x04 /* i_broot points to the bmap b-tree root */
+#define XFS_IFEXTIREC 0x08 /* Indirection array of extent blocks */
/*
- * Flags for xfs_imap() and xfs_dilocate().
+ * Flags for xfs_itobp(), 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
-
+#define XFS_IMAP_LOOKUP 0x1
+#define XFS_IMAP_BULKSTAT 0x2
#ifdef __KERNEL__
struct bhv_desc;
#define xfs_ilock_trace(i,n,f,ra)
#endif
-/*
- * This structure is used to communicate which extents of a file
- * were holes when a write started from xfs_write_file() to
- * xfs_strat_read(). This is necessary so that we can know which
- * blocks need to be zeroed when they are read in in xfs_strat_read()
- * if they weren\'t allocated when the buffer given to xfs_strat_read()
- * was mapped.
- *
- * We keep a list of these attached to the inode. The list is
- * protected by the inode lock and the fact that the io lock is
- * held exclusively by writers.
- */
-typedef struct xfs_gap {
- struct xfs_gap *xg_next;
- xfs_fileoff_t xg_offset_fsb;
- xfs_extlen_t xg_count_fsb;
-} xfs_gap_t;
-
typedef struct dm_attrs_s {
__uint32_t da_dmevmask; /* DMIG event mask */
__uint16_t da_dmstate; /* DMIG state info */
*/
typedef struct xfs_chashlist {
struct xfs_chashlist *chl_next;
+ struct xfs_chashlist *chl_prev;
struct xfs_inode *chl_ip;
xfs_daddr_t chl_blkno; /* starting block number of
* the cluster */
/*
* Fork handling.
*/
-#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_IFORK_PTR)
-xfs_ifork_t *xfs_ifork_ptr(xfs_inode_t *ip, int w);
-#define XFS_IFORK_PTR(ip,w) xfs_ifork_ptr(ip,w)
-#else
-#define XFS_IFORK_PTR(ip,w) ((w) == XFS_DATA_FORK ? &(ip)->i_df : (ip)->i_afp)
-#endif
-#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_IFORK_Q)
-int xfs_ifork_q(xfs_inode_t *ip);
-#define XFS_IFORK_Q(ip) xfs_ifork_q(ip)
-#else
+#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)
-#endif
-#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_IFORK_DSIZE)
-int xfs_ifork_dsize(xfs_inode_t *ip);
-#define XFS_IFORK_DSIZE(ip) xfs_ifork_dsize(ip)
-#else
#define XFS_IFORK_DSIZE(ip) XFS_CFORK_DSIZE(&ip->i_d, ip->i_mount)
-#endif
-#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_IFORK_ASIZE)
-int xfs_ifork_asize(xfs_inode_t *ip);
-#define XFS_IFORK_ASIZE(ip) xfs_ifork_asize(ip)
-#else
#define XFS_IFORK_ASIZE(ip) XFS_CFORK_ASIZE(&ip->i_d, ip->i_mount)
-#endif
-#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_IFORK_SIZE)
-int xfs_ifork_size(xfs_inode_t *ip, int w);
-#define XFS_IFORK_SIZE(ip,w) xfs_ifork_size(ip,w)
-#else
#define XFS_IFORK_SIZE(ip,w) XFS_CFORK_SIZE(&ip->i_d, ip->i_mount, w)
-#endif
-#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_IFORK_FORMAT)
-int xfs_ifork_format(xfs_inode_t *ip, int w);
-#define XFS_IFORK_FORMAT(ip,w) xfs_ifork_format(ip,w)
-#else
#define XFS_IFORK_FORMAT(ip,w) XFS_CFORK_FORMAT(&ip->i_d, w)
-#endif
-#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_IFORK_FMT_SET)
-void xfs_ifork_fmt_set(xfs_inode_t *ip, int w, int n);
-#define XFS_IFORK_FMT_SET(ip,w,n) xfs_ifork_fmt_set(ip,w,n)
-#else
#define XFS_IFORK_FMT_SET(ip,w,n) XFS_CFORK_FMT_SET(&ip->i_d, w, n)
-#endif
-#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_IFORK_NEXTENTS)
-int xfs_ifork_nextents(xfs_inode_t *ip, int w);
-#define XFS_IFORK_NEXTENTS(ip,w) xfs_ifork_nextents(ip,w)
-#else
#define XFS_IFORK_NEXTENTS(ip,w) XFS_CFORK_NEXTENTS(&ip->i_d, w)
-#endif
-#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_IFORK_NEXT_SET)
-void xfs_ifork_next_set(xfs_inode_t *ip, int w, int n);
-#define XFS_IFORK_NEXT_SET(ip,w,n) xfs_ifork_next_set(ip,w,n)
-#else
#define XFS_IFORK_NEXT_SET(ip,w,n) XFS_CFORK_NEXT_SET(&ip->i_d, w, n)
-#endif
#ifdef __KERNEL__
#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_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 | \
#define XFS_IFLUSH_ASYNC 4
#define XFS_IFLUSH_DELWRI 5
-/*
- * Flags for xfs_iflush_all.
- */
-#define XFS_FLUSH_ALL 0x1
-
/*
* Flags for xfs_itruncate_start().
*/
#define XFS_ITRUNC_DEFINITE 0x1
#define XFS_ITRUNC_MAYBE 0x2
-#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_ITOV)
-struct vnode *xfs_itov(xfs_inode_t *ip);
-#define XFS_ITOV(ip) xfs_itov(ip)
-#else
#define XFS_ITOV(ip) BHV_TO_VNODE(XFS_ITOBHV(ip))
-#endif
#define XFS_ITOV_NULL(ip) BHV_TO_VNODE_NULL(XFS_ITOBHV(ip))
-#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_ITOBHV)
-struct bhv_desc *xfs_itobhv(xfs_inode_t *ip);
-#define XFS_ITOBHV(ip) xfs_itobhv(ip)
-#else
#define XFS_ITOBHV(ip) ((struct bhv_desc *)(&((ip)->i_bhv_desc)))
-#endif
-#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BHVTOI)
-xfs_inode_t *xfs_bhvtoi(struct bhv_desc *bhvp);
-#define XFS_BHVTOI(bhvp) xfs_bhvtoi(bhvp)
-#else
-#define XFS_BHVTOI(bhvp) \
- ((xfs_inode_t *)((char *)(bhvp) - \
- (char *)&(((xfs_inode_t *)0)->i_bhv_desc)))
-#endif
-
+#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)
/*
/*
* xfs_inode.c prototypes.
*/
-int xfs_inotobp(struct xfs_mount *, struct xfs_trans *, xfs_ino_t,
- xfs_dinode_t **, struct xfs_buf **, int *);
int xfs_itobp(struct xfs_mount *, struct xfs_trans *,
xfs_inode_t *, xfs_dinode_t **, struct xfs_buf **,
- xfs_daddr_t);
+ xfs_daddr_t, uint);
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);
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);
-int xfs_iflush_all(struct xfs_mount *, int);
+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);
+xfs_inode_t *xfs_vtoi(struct vnode *vp);
+
+void xfs_synchronize_atime(xfs_inode_t *);
+
+xfs_bmbt_rec_t *xfs_iext_get_ext(xfs_ifork_t *, xfs_extnum_t);
+void xfs_iext_insert(xfs_ifork_t *, xfs_extnum_t, xfs_extnum_t,
+ xfs_bmbt_irec_t *);
+void xfs_iext_add(xfs_ifork_t *, xfs_extnum_t, int);
+void xfs_iext_add_indirect_multi(xfs_ifork_t *, int, xfs_extnum_t, int);
+void xfs_iext_remove(xfs_ifork_t *, xfs_extnum_t, int);
+void xfs_iext_remove_inline(xfs_ifork_t *, xfs_extnum_t, int);
+void xfs_iext_remove_direct(xfs_ifork_t *, xfs_extnum_t, int);
+void xfs_iext_remove_indirect(xfs_ifork_t *, xfs_extnum_t, int);
+void xfs_iext_realloc_direct(xfs_ifork_t *, int);
+void xfs_iext_realloc_indirect(xfs_ifork_t *, int);
+void xfs_iext_indirect_to_direct(xfs_ifork_t *);
+void xfs_iext_direct_to_inline(xfs_ifork_t *, xfs_extnum_t);
+void xfs_iext_inline_to_direct(xfs_ifork_t *, int);
+void xfs_iext_destroy(xfs_ifork_t *);
+xfs_bmbt_rec_t *xfs_iext_bno_to_ext(xfs_ifork_t *, xfs_fileoff_t, int *);
+xfs_ext_irec_t *xfs_iext_bno_to_irec(xfs_ifork_t *, xfs_fileoff_t, int *);
+xfs_ext_irec_t *xfs_iext_idx_to_irec(xfs_ifork_t *, xfs_extnum_t *, int *, int);
+void xfs_iext_irec_init(xfs_ifork_t *);
+xfs_ext_irec_t *xfs_iext_irec_new(xfs_ifork_t *, int);
+void xfs_iext_irec_remove(xfs_ifork_t *, int);
+void xfs_iext_irec_compact(xfs_ifork_t *);
+void xfs_iext_irec_compact_pages(xfs_ifork_t *);
+void xfs_iext_irec_compact_full(xfs_ifork_t *);
+void xfs_iext_irec_update_extoffs(xfs_ifork_t *, int, int);
+
#define xfs_ipincount(ip) ((unsigned int) atomic_read(&ip->i_pincount))
#ifdef DEBUG
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