Linux-2.6.12-rc2v2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

1 files changed, 379 insertions, 0 deletions

diff --git a/fs/xfs/xfs_bmap.h b/fs/xfs/xfs_bmap.h
new file mode 100644
index 000000000000..f1bc22fb26ae
--- /dev/null
+++ b/fs/xfs/xfs_bmap.h
@@ -0,0 +1,379 @@
+/*
+ * Copyright (c) 2000-2003 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
+ * 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.
+ *
+ * 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/
+ */
+#ifndef __XFS_BMAP_H__
+#define __XFS_BMAP_H__
+
+struct getbmap;
+struct xfs_bmbt_irec;
+struct xfs_inode;
+struct xfs_mount;
+struct xfs_trans;
+
+/*
+ * List of extents to be free "later".
+ * The list is kept sorted on xbf_startblock.
+ */
+typedef struct xfs_bmap_free_item
+{
+        xfs_fsblock_t           xbfi_startblock;/* starting fs block number */
+        xfs_extlen_t            xbfi_blockcount;/* number of blocks in extent */
+        struct xfs_bmap_free_item *xbfi_next;   /* link to next entry */
+} xfs_bmap_free_item_t;
+
+/*
+ * Header for free extent list.
+ */
+typedef struct xfs_bmap_free
+{
+        xfs_bmap_free_item_t    *xbf_first;     /* list of to-be-free extents */
+        int                     xbf_count;      /* count of items on list */
+        int                     xbf_low;        /* kludge: alloc in low mode */
+} xfs_bmap_free_t;
+
+#define XFS_BMAP_MAX_NMAP       4
+
+/*
+ * Flags for xfs_bmapi
+ */
+#define XFS_BMAPI_WRITE         0x001   /* write operation: allocate space */
+#define XFS_BMAPI_DELAY         0x002   /* delayed write operation */
+#define XFS_BMAPI_ENTIRE        0x004   /* return entire extent, not trimmed */
+#define XFS_BMAPI_METADATA      0x008   /* mapping metadata not user data */
+#define XFS_BMAPI_EXACT         0x010   /* allocate only to spec'd bounds */
+#define XFS_BMAPI_ATTRFORK      0x020   /* use attribute fork not data */
+#define XFS_BMAPI_ASYNC         0x040   /* bunmapi xactions can be async */
+#define XFS_BMAPI_RSVBLOCKS     0x080   /* OK to alloc. reserved data blocks */
+#define XFS_BMAPI_PREALLOC      0x100   /* preallocation op: unwritten space */
+#define XFS_BMAPI_IGSTATE       0x200   /* Ignore state - */
+                                        /* combine contig. space */
+#define XFS_BMAPI_CONTIG        0x400   /* must allocate only one extent */
+
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAPI_AFLAG)
+int xfs_bmapi_aflag(int w);
+#define XFS_BMAPI_AFLAG(w)      xfs_bmapi_aflag(w)
+#else
+#define XFS_BMAPI_AFLAG(w)      ((w) == XFS_ATTR_FORK ? XFS_BMAPI_ATTRFORK : 0)
+#endif
+
+/*
+ * Special values for xfs_bmbt_irec_t br_startblock field.
+ */
+#define DELAYSTARTBLOCK         ((xfs_fsblock_t)-1LL)
+#define HOLESTARTBLOCK          ((xfs_fsblock_t)-2LL)
+
+#if XFS_WANT_FUNCS || (XFS_WANT_SPACE && XFSSO_XFS_BMAP_INIT)
+void xfs_bmap_init(xfs_bmap_free_t *flp, xfs_fsblock_t *fbp);
+#define XFS_BMAP_INIT(flp,fbp)  xfs_bmap_init(flp,fbp)
+#else
+#define XFS_BMAP_INIT(flp,fbp)  \
+        ((flp)->xbf_first = NULL, (flp)->xbf_count = 0, \
+         (flp)->xbf_low = 0, *(fbp) = NULLFSBLOCK)
+#endif
+
+/*
+ * Argument structure for xfs_bmap_alloc.
+ */
+typedef struct xfs_bmalloca {
+        xfs_fsblock_t           firstblock; /* i/o first block allocated */
+        xfs_fsblock_t           rval;   /* starting block of new extent */
+        xfs_fileoff_t           off;    /* offset in file filling in */
+        struct xfs_trans        *tp;    /* transaction pointer */
+        struct xfs_inode        *ip;    /* incore inode pointer */
+        struct xfs_bmbt_irec    *prevp; /* extent before the new one */
+        struct xfs_bmbt_irec    *gotp;  /* extent after, or delayed */
+        xfs_extlen_t            alen;   /* i/o length asked/allocated */
+        xfs_extlen_t            total;  /* total blocks needed for xaction */
+        xfs_extlen_t            minlen; /* mininum allocation size (blocks) */
+        xfs_extlen_t            minleft; /* amount must be left after alloc */
+        char                    eof;    /* set if allocating past last extent */
+        char                    wasdel; /* replacing a delayed allocation */
+        char                    userdata;/* set if is user data */
+        char                    low;    /* low on space, using seq'l ags */
+        char                    aeof;   /* allocated space at eof */
+} xfs_bmalloca_t;
+
+#ifdef __KERNEL__
+
+#if defined(XFS_BMAP_TRACE)
+/*
+ * Trace operations for bmap extent tracing
+ */
+#define XFS_BMAP_KTRACE_DELETE  1
+#define XFS_BMAP_KTRACE_INSERT  2
+#define XFS_BMAP_KTRACE_PRE_UP  3
+#define XFS_BMAP_KTRACE_POST_UP 4
+
+#define XFS_BMAP_TRACE_SIZE     4096    /* size of global trace buffer */
+#define XFS_BMAP_KTRACE_SIZE    32      /* size of per-inode trace buffer */
+extern ktrace_t *xfs_bmap_trace_buf;
+
+/*
+ * Add bmap trace insert entries for all the contents of the extent list.
+ */
+void
+xfs_bmap_trace_exlist(
+        char                    *fname,         /* function name */
+        struct xfs_inode        *ip,            /* incore inode pointer */
+        xfs_extnum_t            cnt,            /* count of entries in list */
+        int                     whichfork);     /* data or attr fork */
+#else
+#define xfs_bmap_trace_exlist(f,ip,c,w)
+#endif
+
+/*
+ * Convert inode from non-attributed to attributed.
+ * Must not be in a transaction, ip must not be locked.
+ */
+int                                     /* error code */
+xfs_bmap_add_attrfork(
+        struct xfs_inode        *ip,    /* incore inode pointer */
+        int                                     rsvd);  /* flag for reserved block allocation */
+
+/*
+ * Add the extent to the list of extents to be free at transaction end.
+ * The list is maintained sorted (by block number).
+ */
+void
+xfs_bmap_add_free(
+        xfs_fsblock_t           bno,            /* fs block number of extent */
+        xfs_filblks_t           len,            /* length of extent */
+        xfs_bmap_free_t         *flist,         /* list of extents */
+        struct xfs_mount        *mp);           /* mount point structure */
+
+/*
+ * Routine to clean up the free list data structure when
+ * an error occurs during a transaction.
+ */
+void
+xfs_bmap_cancel(
+        xfs_bmap_free_t         *flist);        /* free list to clean up */
+
+/*
+ * Compute and fill in the value of the maximum depth of a bmap btree
+ * in this filesystem.  Done once, during mount.
+ */
+void
+xfs_bmap_compute_maxlevels(
+        struct xfs_mount        *mp,    /* file system mount structure */
+        int                     whichfork);     /* data or attr fork */
+
+/*
+ * Routine to be called at transaction's end by xfs_bmapi, xfs_bunmapi
+ * caller.  Frees all the extents that need freeing, which must be done
+ * last due to locking considerations.
+ *
+ * Return 1 if the given transaction was committed and a new one allocated,
+ * and 0 otherwise.
+ */
+int                                             /* error */
+xfs_bmap_finish(
+        struct xfs_trans        **tp,           /* transaction pointer addr */
+        xfs_bmap_free_t         *flist,         /* i/o: list extents to free */
+        xfs_fsblock_t           firstblock,     /* controlled a.g. for allocs */
+        int                     *committed);    /* xact committed or not */
+
+/*
+ * Returns the file-relative block number of the first unused block in the file.
+ * This is the lowest-address hole if the file has holes, else the first block
+ * past the end of file.
+ */
+int                                             /* error */
+xfs_bmap_first_unused(
+        struct xfs_trans        *tp,            /* transaction pointer */
+        struct xfs_inode        *ip,            /* incore inode */
+        xfs_extlen_t            len,            /* size of hole to find */
+        xfs_fileoff_t           *unused,        /* unused block num */
+        int                     whichfork);     /* data or attr fork */
+
+/*
+ * Returns the file-relative block number of the last block + 1 before
+ * last_block (input value) in the file.
+ * This is not based on i_size, it is based on the extent list.
+ * Returns 0 for local files, as they do not have an extent list.
+ */
+int                                             /* error */
+xfs_bmap_last_before(
+        struct xfs_trans        *tp,            /* transaction pointer */
+        struct xfs_inode        *ip,            /* incore inode */
+        xfs_fileoff_t           *last_block,    /* last block */
+        int                     whichfork);     /* data or attr fork */
+
+/*
+ * Returns the file-relative block number of the first block past eof in
+ * the file.  This is not based on i_size, it is based on the extent list.
+ * Returns 0 for local files, as they do not have an extent list.
+ */
+int                                             /* error */
+xfs_bmap_last_offset(
+        struct xfs_trans        *tp,            /* transaction pointer */
+        struct xfs_inode        *ip,            /* incore inode */
+        xfs_fileoff_t           *unused,        /* last block num */
+        int                     whichfork);     /* data or attr fork */
+
+/*
+ * Returns whether the selected fork of the inode has exactly one
+ * block or not.  For the data fork we check this matches di_size,
+ * implying the file's range is 0..bsize-1.
+ */
+int
+xfs_bmap_one_block(
+        struct xfs_inode        *ip,            /* incore inode */
+        int                     whichfork);     /* data or attr fork */
+
+/*
+ * Read in the extents to iu_extents.
+ * All inode fields are set up by caller, we just traverse the btree
+ * and copy the records in.
+ */
+int                                             /* error */
+xfs_bmap_read_extents(
+        struct xfs_trans        *tp,            /* transaction pointer */
+        struct xfs_inode        *ip,            /* incore inode */
+        int                     whichfork);     /* data or attr fork */
+
+/*
+ * Map file blocks to filesystem blocks.
+ * File range is given by the bno/len pair.
+ * Adds blocks to file if a write ("flags & XFS_BMAPI_WRITE" set)
+ * into a hole or past eof.
+ * Only allocates blocks from a single allocation group,
+ * to avoid locking problems.
+ * The returned value in "firstblock" from the first call in a transaction
+ * must be remembered and presented to subsequent calls in "firstblock".
+ * An upper bound for the number of blocks to be allocated is supplied to
+ * the first call in "total"; if no allocation group has that many free
+ * blocks then the call will fail (return NULLFSBLOCK in "firstblock").
+ */
+int                                             /* error */
+xfs_bmapi(
+        struct xfs_trans        *tp,            /* transaction pointer */
+        struct xfs_inode        *ip,            /* incore inode */
+        xfs_fileoff_t           bno,            /* starting file offs. mapped */
+        xfs_filblks_t           len,            /* length to map in file */
+        int                     flags,          /* XFS_BMAPI_... */
+        xfs_fsblock_t           *firstblock,    /* first allocated block
+                                                   controls a.g. for allocs */
+        xfs_extlen_t            total,          /* total blocks needed */
+        struct xfs_bmbt_irec    *mval,          /* output: map values */
+        int                     *nmap,          /* i/o: mval size/count */
+        xfs_bmap_free_t         *flist);        /* i/o: list extents to free */
+
+/*
+ * Map file blocks to filesystem blocks, simple version.
+ * One block only, read-only.
+ * For flags, only the XFS_BMAPI_ATTRFORK flag is examined.
+ * For the other flag values, the effect is as if XFS_BMAPI_METADATA
+ * was set and all the others were clear.
+ */
+int                                             /* error */
+xfs_bmapi_single(
+        struct xfs_trans        *tp,            /* transaction pointer */
+        struct xfs_inode        *ip,            /* incore inode */
+        int                     whichfork,      /* data or attr fork */
+        xfs_fsblock_t           *fsb,           /* output: mapped block */
+        xfs_fileoff_t           bno);           /* starting file offs. mapped */
+
+/*
+ * Unmap (remove) blocks from a file.
+ * If nexts is nonzero then the number of extents to remove is limited to
+ * that value.  If not all extents in the block range can be removed then
+ * *done is set.
+ */
+int                                             /* error */
+xfs_bunmapi(
+        struct xfs_trans        *tp,            /* transaction pointer */
+        struct xfs_inode        *ip,            /* incore inode */
+        xfs_fileoff_t           bno,            /* starting offset to unmap */
+        xfs_filblks_t           len,            /* length to unmap in file */
+        int                     flags,          /* XFS_BMAPI_... */
+        xfs_extnum_t            nexts,          /* number of extents max */
+        xfs_fsblock_t           *firstblock,    /* first allocated block
+                                                   controls a.g. for allocs */
+        xfs_bmap_free_t         *flist,         /* i/o: list extents to free */
+        int                     *done);         /* set if not done yet */
+
+/*
+ * Fcntl interface to xfs_bmapi.
+ */
+int                                             /* error code */
+xfs_getbmap(
+        bhv_desc_t              *bdp,           /* XFS behavior descriptor*/
+        struct getbmap          *bmv,           /* user bmap structure */
+        void                    __user *ap,     /* pointer to user's array */
+        int                     iflags);        /* interface flags */
+
+/*
+ * Check the last inode extent to determine whether this allocation will result
+ * in blocks being allocated at the end of the file. When we allocate new data
+ * blocks at the end of the file which do not start at the previous data block,
+ * we will try to align the new blocks at stripe unit boundaries.
+ */
+int
+xfs_bmap_isaeof(
+        struct xfs_inode        *ip,
+        xfs_fileoff_t           off,
+        int                     whichfork,
+        char                    *aeof);
+
+/*
+ * Check if the endoff is outside the last extent. If so the caller will grow
+ * the allocation to a stripe unit boundary
+ */
+int
+xfs_bmap_eof(
+        struct xfs_inode        *ip,
+        xfs_fileoff_t           endoff,
+        int                     whichfork,
+        int                     *eof);
+
+/*
+ * Count fsblocks of the given fork.
+ */
+int
+xfs_bmap_count_blocks(
+        xfs_trans_t             *tp,
+        struct xfs_inode        *ip,
+        int                     whichfork,
+        int                     *count);
+
+/*
+ * Check an extent list, which has just been read, for
+ * any bit in the extent flag field.
+ */
+int
+xfs_check_nostate_extents(
+        xfs_bmbt_rec_t          *ep,
+        xfs_extnum_t            num);
+
+#endif  /* __KERNEL__ */
+
+#endif  /* __XFS_BMAP_H__ */