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, 187 insertions, 0 deletions

diff --git a/fs/xfs/xfs_rtalloc.h b/fs/xfs/xfs_rtalloc.h
new file mode 100644
index 000000000000..e2710264c054
--- /dev/null
+++ b/fs/xfs/xfs_rtalloc.h
@@ -0,0 +1,187 @@
+/*
+ * 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_RTALLOC_H__
+#define __XFS_RTALLOC_H__
+
+struct xfs_mount;
+struct xfs_trans;
+
+#define XFS_IS_REALTIME_INODE(ip) ((ip)->i_d.di_flags & XFS_DIFLAG_REALTIME)
+
+/* Min and max rt extent sizes, specified in bytes */
+#define XFS_MAX_RTEXTSIZE       (1024 * 1024 * 1024)    /* 1GB */
+#define XFS_DFL_RTEXTSIZE       (64 * 1024)             /* 64KB */
+#define XFS_MIN_RTEXTSIZE       (4 * 1024)              /* 4KB */
+
+/*
+ * Constants for bit manipulations.
+ */
+#define XFS_NBBYLOG     3               /* log2(NBBY) */
+#define XFS_WORDLOG     2               /* log2(sizeof(xfs_rtword_t)) */
+#define XFS_NBWORDLOG   (XFS_NBBYLOG + XFS_WORDLOG)
+#define XFS_NBWORD      (1 << XFS_NBWORDLOG)
+#define XFS_WORDMASK    ((1 << XFS_WORDLOG) - 1)
+
+#define XFS_BLOCKSIZE(mp)       ((mp)->m_sb.sb_blocksize)
+#define XFS_BLOCKMASK(mp)       ((mp)->m_blockmask)
+#define XFS_BLOCKWSIZE(mp)      ((mp)->m_blockwsize)
+#define XFS_BLOCKWMASK(mp)      ((mp)->m_blockwmask)
+
+/*
+ * Summary and bit manipulation macros.
+ */
+#define XFS_SUMOFFS(mp,ls,bb)   ((int)((ls) * (mp)->m_sb.sb_rbmblocks + (bb)))
+#define XFS_SUMOFFSTOBLOCK(mp,s)        \
+        (((s) * (uint)sizeof(xfs_suminfo_t)) >> (mp)->m_sb.sb_blocklog)
+#define XFS_SUMPTR(mp,bp,so)    \
+        ((xfs_suminfo_t *)((char *)XFS_BUF_PTR(bp) + \
+                (((so) * (uint)sizeof(xfs_suminfo_t)) & XFS_BLOCKMASK(mp))))
+
+#define XFS_BITTOBLOCK(mp,bi)   ((bi) >> (mp)->m_blkbit_log)
+#define XFS_BLOCKTOBIT(mp,bb)   ((bb) << (mp)->m_blkbit_log)
+#define XFS_BITTOWORD(mp,bi)    \
+        ((int)(((bi) >> XFS_NBWORDLOG) & XFS_BLOCKWMASK(mp)))
+
+#define XFS_RTMIN(a,b)  ((a) < (b) ? (a) : (b))
+#define XFS_RTMAX(a,b)  ((a) > (b) ? (a) : (b))
+
+#define XFS_RTLOBIT(w)  xfs_lowbit32(w)
+#define XFS_RTHIBIT(w)  xfs_highbit32(w)
+
+#if XFS_BIG_BLKNOS
+#define XFS_RTBLOCKLOG(b)       xfs_highbit64(b)
+#else
+#define XFS_RTBLOCKLOG(b)       xfs_highbit32(b)
+#endif
+
+
+#ifdef __KERNEL__
+
+#ifdef CONFIG_XFS_RT
+/*
+ * Function prototypes for exported functions.
+ */
+
+/*
+ * Allocate an extent in the realtime subvolume, with the usual allocation
+ * parameters.  The length units are all in realtime extents, as is the
+ * result block number.
+ */
+int                                     /* error */
+xfs_rtallocate_extent(
+        struct xfs_trans        *tp,    /* transaction pointer */
+        xfs_rtblock_t           bno,    /* starting block number to allocate */
+        xfs_extlen_t            minlen, /* minimum length to allocate */
+        xfs_extlen_t            maxlen, /* maximum length to allocate */
+        xfs_extlen_t            *len,   /* out: actual length allocated */
+        xfs_alloctype_t         type,   /* allocation type XFS_ALLOCTYPE... */
+        int                     wasdel, /* was a delayed allocation extent */
+        xfs_extlen_t            prod,   /* extent product factor */
+        xfs_rtblock_t           *rtblock); /* out: start block allocated */
+
+/*
+ * Free an extent in the realtime subvolume.  Length is expressed in
+ * realtime extents, as is the block number.
+ */
+int                                     /* error */
+xfs_rtfree_extent(
+        struct xfs_trans        *tp,    /* transaction pointer */
+        xfs_rtblock_t           bno,    /* starting block number to free */
+        xfs_extlen_t            len);   /* length of extent freed */
+
+/*
+ * Initialize realtime fields in the mount structure.
+ */
+int                                     /* error */
+xfs_rtmount_init(
+        struct xfs_mount        *mp);   /* file system mount structure */
+
+/*
+ * Get the bitmap and summary inodes into the mount structure
+ * at mount time.
+ */
+int                                     /* error */
+xfs_rtmount_inodes(
+        struct xfs_mount        *mp);   /* file system mount structure */
+
+/*
+ * Pick an extent for allocation at the start of a new realtime file.
+ * Use the sequence number stored in the atime field of the bitmap inode.
+ * Translate this to a fraction of the rtextents, and return the product
+ * of rtextents and the fraction.
+ * The fraction sequence is 0, 1/2, 1/4, 3/4, 1/8, ..., 7/8, 1/16, ...
+ */
+int                                     /* error */
+xfs_rtpick_extent(
+        struct xfs_mount        *mp,    /* file system mount point */
+        struct xfs_trans        *tp,    /* transaction pointer */
+        xfs_extlen_t            len,    /* allocation length (rtextents) */
+        xfs_rtblock_t           *pick); /* result rt extent */
+
+/*
+ * Debug code: print out the value of a range in the bitmap.
+ */
+void
+xfs_rtprint_range(
+        struct xfs_mount        *mp,    /* file system mount structure */
+        struct xfs_trans        *tp,    /* transaction pointer */
+        xfs_rtblock_t           start,  /* starting block to print */
+        xfs_extlen_t            len);   /* length to print */
+
+/*
+ * Debug code: print the summary file.
+ */
+void
+xfs_rtprint_summary(
+        struct xfs_mount        *mp,    /* file system mount structure */
+        struct xfs_trans        *tp);   /* transaction pointer */
+
+/*
+ * Grow the realtime area of the filesystem.
+ */
+int
+xfs_growfs_rt(
+        struct xfs_mount        *mp,    /* file system mount structure */
+        xfs_growfs_rt_t         *in);   /* user supplied growfs struct */
+
+#else
+# define xfs_rtallocate_extent(t,b,min,max,l,a,f,p,rb)  (ENOSYS)
+# define xfs_rtfree_extent(t,b,l)                       (ENOSYS)
+# define xfs_rtpick_extent(m,t,l,rb)                    (ENOSYS)
+# define xfs_growfs_rt(mp,in)                           (ENOSYS)
+# define xfs_rtmount_init(m)    (((mp)->m_sb.sb_rblocks == 0)? 0 : (ENOSYS))
+# define xfs_rtmount_inodes(m)  (((mp)->m_sb.sb_rblocks == 0)? 0 : (ENOSYS))
+#endif  /* CONFIG_XFS_RT */
+
+#endif  /* __KERNEL__ */
+
+#endif  /* __XFS_RTALLOC_H__ */