zte's code,first commit
Change-Id: I9a04da59e459a9bc0d67f101f700d9d7dc8d681b
diff --git a/ap/os/linux/linux-3.4.x/fs/xfs/xfs_rtalloc.h b/ap/os/linux/linux-3.4.x/fs/xfs/xfs_rtalloc.h
new file mode 100644
index 0000000..f7f3a35
--- /dev/null
+++ b/ap/os/linux/linux-3.4.x/fs/xfs/xfs_rtalloc.h
@@ -0,0 +1,166 @@
+/*
+ * 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_RTALLOC_H__
+#define __XFS_RTALLOC_H__
+
+struct xfs_mount;
+struct xfs_trans;
+
+/* 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 *)((bp)->b_addr + \
+ (((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 */
+void
+xfs_rtunmount_inodes(
+ struct xfs_mount *mp);
+
+/*
+ * 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 */
+
+/*
+ * 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)
+static inline int /* error */
+xfs_rtmount_init(
+ xfs_mount_t *mp) /* file system mount structure */
+{
+ if (mp->m_sb.sb_rblocks == 0)
+ return 0;
+
+ xfs_warn(mp, "Not built with CONFIG_XFS_RT");
+ return ENOSYS;
+}
+# define xfs_rtmount_inodes(m) (((mp)->m_sb.sb_rblocks == 0)? 0 : (ENOSYS))
+# define xfs_rtunmount_inodes(m)
+#endif /* CONFIG_XFS_RT */
+
+#endif /* __KERNEL__ */
+
+#endif /* __XFS_RTALLOC_H__ */