xfs: move xfs_bmap_rtalloc to xfs_rtalloc.c

xfs_bmap_rtalloc is currently in xfs_bmap_util.c, which is a somewhat
odd spot for it, given that is only called from xfs_bmap.c and calls
into xfs_rtalloc.c to do the actual work.  Move xfs_bmap_rtalloc to
xfs_rtalloc.c and mark xfs_rtpick_extent xfs_rtallocate_extent and
xfs_rtallocate_extent static now that they aren't called from outside
of xfs_rtalloc.c.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: "Darrick J. Wong" <djwong@kernel.org>
Signed-off-by: Chandan Babu R <chandanbabu@kernel.org>

Author: Christoph Hellwig

fs/xfs/xfs_bmap_util.c

@@ -69,137 +69,6 @@ xfs_zero_extent(
 		GFP_NOFS, 0);
 }
 
-#ifdef CONFIG_XFS_RT
-int
-xfs_bmap_rtalloc(
-	struct xfs_bmalloca	*ap)
-{
-	struct xfs_mount	*mp = ap->ip->i_mount;
-	xfs_fileoff_t		orig_offset = ap->offset;
-	xfs_rtxnum_t		rtx;
-	xfs_rtxlen_t		prod = 0;  /* product factor for allocators */
-	xfs_extlen_t		mod = 0;   /* product factor for allocators */
-	xfs_rtxlen_t		ralen = 0; /* realtime allocation length */
-	xfs_extlen_t		align;     /* minimum allocation alignment */
-	xfs_extlen_t		orig_length = ap->length;
-	xfs_extlen_t		minlen = mp->m_sb.sb_rextsize;
-	xfs_rtxlen_t		raminlen;
-	bool			rtlocked = false;
-	bool			ignore_locality = false;
-	int			error;
-
-	align = xfs_get_extsz_hint(ap->ip);
-retry:
-	prod = xfs_extlen_to_rtxlen(mp, align);
-	error = xfs_bmap_extsize_align(mp, &ap->got, &ap->prev,
-					align, 1, ap->eof, 0,
-					ap->conv, &ap->offset, &ap->length);
-	if (error)
-		return error;
-	ASSERT(ap->length);
-	ASSERT(xfs_extlen_to_rtxmod(mp, ap->length) == 0);
-
-	/*
-	 * If we shifted the file offset downward to satisfy an extent size
-	 * hint, increase minlen by that amount so that the allocator won't
-	 * give us an allocation that's too short to cover at least one of the
-	 * blocks that the caller asked for.
-	 */
-	if (ap->offset != orig_offset)
-		minlen += orig_offset - ap->offset;
-
-	/*
-	 * If the offset & length are not perfectly aligned
-	 * then kill prod, it will just get us in trouble.
-	 */
-	div_u64_rem(ap->offset, align, &mod);
-	if (mod || ap->length % align)
-		prod = 1;
-	/*
-	 * Set ralen to be the actual requested length in rtextents.
-	 *
-	 * If the old value was close enough to XFS_BMBT_MAX_EXTLEN that
-	 * we rounded up to it, cut it back so it's valid again.
-	 * Note that if it's a really large request (bigger than
-	 * XFS_BMBT_MAX_EXTLEN), we don't hear about that number, and can't
-	 * adjust the starting point to match it.
-	 */
-	ralen = xfs_extlen_to_rtxlen(mp, min(ap->length, XFS_MAX_BMBT_EXTLEN));
-
-	/*
-	 * Lock out modifications to both the RT bitmap and summary inodes
-	 */
-	if (!rtlocked) {
-		xfs_ilock(mp->m_rbmip, XFS_ILOCK_EXCL|XFS_ILOCK_RTBITMAP);
-		xfs_trans_ijoin(ap->tp, mp->m_rbmip, XFS_ILOCK_EXCL);
-		xfs_ilock(mp->m_rsumip, XFS_ILOCK_EXCL|XFS_ILOCK_RTSUM);
-		xfs_trans_ijoin(ap->tp, mp->m_rsumip, XFS_ILOCK_EXCL);
-		rtlocked = true;
-	}
-
-	/*
-	 * If it's an allocation to an empty file at offset 0,
-	 * pick an extent that will space things out in the rt area.
-	 */
-	if (ap->eof && ap->offset == 0) {
-		error = xfs_rtpick_extent(mp, ap->tp, ralen, &rtx);
-		if (error)
-			return error;
-		ap->blkno = xfs_rtx_to_rtb(mp, rtx);
-	} else {
-		ap->blkno = 0;
-	}
-
-	xfs_bmap_adjacent(ap);
-
-	/*
-	 * Realtime allocation, done through xfs_rtallocate_extent.
-	 */
-	if (ignore_locality)
-		rtx = 0;
-	else
-		rtx = xfs_rtb_to_rtx(mp, ap->blkno);
-	raminlen = max_t(xfs_rtxlen_t, 1, xfs_extlen_to_rtxlen(mp, minlen));
-	error = xfs_rtallocate_extent(ap->tp, rtx, raminlen, ralen, &ralen,
-			ap->wasdel, prod, &rtx);
-	if (error)
-		return error;
-
-	if (rtx != NULLRTEXTNO) {
-		ap->blkno = xfs_rtx_to_rtb(mp, rtx);
-		ap->length = xfs_rtxlen_to_extlen(mp, ralen);
-		xfs_bmap_alloc_account(ap);
-		return 0;
-	}
-
-	if (align > mp->m_sb.sb_rextsize) {
-		/*
-		 * We previously enlarged the request length to try to satisfy
-		 * an extent size hint.  The allocator didn't return anything,
-		 * so reset the parameters to the original values and try again
-		 * without alignment criteria.
-		 */
-		ap->offset = orig_offset;
-		ap->length = orig_length;
-		minlen = align = mp->m_sb.sb_rextsize;
-		goto retry;
-	}
-
-	if (!ignore_locality && ap->blkno != 0) {
-		/*
-		 * If we can't allocate near a specific rt extent, try again
-		 * without locality criteria.
-		 */
-		ignore_locality = true;
-		goto retry;
-	}
-
-	ap->blkno = NULLFSBLOCK;
-	ap->length = 0;
-	return 0;
-}
-#endif /* CONFIG_XFS_RT */
-
 /*
  * Extent tree block counting routines.
  */

fs/xfs/xfs_rtalloc.c

@@ -14,12 +14,14 @@
 #include "xfs_inode.h"
 #include "xfs_bmap.h"
 #include "xfs_bmap_btree.h"
+#include "xfs_bmap_util.h"
 #include "xfs_trans.h"
 #include "xfs_trans_space.h"
 #include "xfs_icache.h"
 #include "xfs_rtalloc.h"
 #include "xfs_sb.h"
 #include "xfs_rtbitmap.h"
+#include "xfs_quota.h"
 
 /*
  * Read and return the summary information for a given extent size,
@@ -1171,7 +1173,7 @@ xfs_growfs_rt(
  * parameters.  The length units are all in realtime extents, as is the
  * result block number.
  */
-int
+static int
 xfs_rtallocate_extent(
 	struct xfs_trans	*tp,
 	xfs_rtxnum_t		start,	/* starting rtext number to allocate */
@@ -1419,7 +1421,7 @@ xfs_rtunmount_inodes(
  * of rtextents and the fraction.
  * The fraction sequence is 0, 1/2, 1/4, 3/4, 1/8, ..., 7/8, 1/16, ...
  */
-int						/* error */
+static int
 xfs_rtpick_extent(
 	xfs_mount_t		*mp,		/* file system mount point */
 	xfs_trans_t		*tp,		/* transaction pointer */
@@ -1458,3 +1460,132 @@ xfs_rtpick_extent(
 	*pick = b;
 	return 0;
 }
+
+int
+xfs_bmap_rtalloc(
+	struct xfs_bmalloca	*ap)
+{
+	struct xfs_mount	*mp = ap->ip->i_mount;
+	xfs_fileoff_t		orig_offset = ap->offset;
+	xfs_rtxnum_t		rtx;
+	xfs_rtxlen_t		prod = 0;  /* product factor for allocators */
+	xfs_extlen_t		mod = 0;   /* product factor for allocators */
+	xfs_rtxlen_t		ralen = 0; /* realtime allocation length */
+	xfs_extlen_t		align;     /* minimum allocation alignment */
+	xfs_extlen_t		orig_length = ap->length;
+	xfs_extlen_t		minlen = mp->m_sb.sb_rextsize;
+	xfs_rtxlen_t		raminlen;
+	bool			rtlocked = false;
+	bool			ignore_locality = false;
+	int			error;
+
+	align = xfs_get_extsz_hint(ap->ip);
+retry:
+	prod = xfs_extlen_to_rtxlen(mp, align);
+	error = xfs_bmap_extsize_align(mp, &ap->got, &ap->prev,
+					align, 1, ap->eof, 0,
+					ap->conv, &ap->offset, &ap->length);
+	if (error)
+		return error;
+	ASSERT(ap->length);
+	ASSERT(xfs_extlen_to_rtxmod(mp, ap->length) == 0);
+
+	/*
+	 * If we shifted the file offset downward to satisfy an extent size
+	 * hint, increase minlen by that amount so that the allocator won't
+	 * give us an allocation that's too short to cover at least one of the
+	 * blocks that the caller asked for.
+	 */
+	if (ap->offset != orig_offset)
+		minlen += orig_offset - ap->offset;
+
+	/*
+	 * If the offset & length are not perfectly aligned
+	 * then kill prod, it will just get us in trouble.
+	 */
+	div_u64_rem(ap->offset, align, &mod);
+	if (mod || ap->length % align)
+		prod = 1;
+	/*
+	 * Set ralen to be the actual requested length in rtextents.
+	 *
+	 * If the old value was close enough to XFS_BMBT_MAX_EXTLEN that
+	 * we rounded up to it, cut it back so it's valid again.
+	 * Note that if it's a really large request (bigger than
+	 * XFS_BMBT_MAX_EXTLEN), we don't hear about that number, and can't
+	 * adjust the starting point to match it.
+	 */
+	ralen = xfs_extlen_to_rtxlen(mp, min(ap->length, XFS_MAX_BMBT_EXTLEN));
+
+	/*
+	 * Lock out modifications to both the RT bitmap and summary inodes
+	 */
+	if (!rtlocked) {
+		xfs_ilock(mp->m_rbmip, XFS_ILOCK_EXCL|XFS_ILOCK_RTBITMAP);
+		xfs_trans_ijoin(ap->tp, mp->m_rbmip, XFS_ILOCK_EXCL);
+		xfs_ilock(mp->m_rsumip, XFS_ILOCK_EXCL|XFS_ILOCK_RTSUM);
+		xfs_trans_ijoin(ap->tp, mp->m_rsumip, XFS_ILOCK_EXCL);
+		rtlocked = true;
+	}
+
+	/*
+	 * If it's an allocation to an empty file at offset 0,
+	 * pick an extent that will space things out in the rt area.
+	 */
+	if (ap->eof && ap->offset == 0) {
+		error = xfs_rtpick_extent(mp, ap->tp, ralen, &rtx);
+		if (error)
+			return error;
+		ap->blkno = xfs_rtx_to_rtb(mp, rtx);
+	} else {
+		ap->blkno = 0;
+	}
+
+	xfs_bmap_adjacent(ap);
+
+	/*
+	 * Realtime allocation, done through xfs_rtallocate_extent.
+	 */
+	if (ignore_locality)
+		rtx = 0;
+	else
+		rtx = xfs_rtb_to_rtx(mp, ap->blkno);
+	raminlen = max_t(xfs_rtxlen_t, 1, xfs_extlen_to_rtxlen(mp, minlen));
+	error = xfs_rtallocate_extent(ap->tp, rtx, raminlen, ralen, &ralen,
+			ap->wasdel, prod, &rtx);
+	if (error)
+		return error;
+
+	if (rtx != NULLRTEXTNO) {
+		ap->blkno = xfs_rtx_to_rtb(mp, rtx);
+		ap->length = xfs_rtxlen_to_extlen(mp, ralen);
+		xfs_bmap_alloc_account(ap);
+		return 0;
+	}
+
+	if (align > mp->m_sb.sb_rextsize) {
+		/*
+		 * We previously enlarged the request length to try to satisfy
+		 * an extent size hint.  The allocator didn't return anything,
+		 * so reset the parameters to the original values and try again
+		 * without alignment criteria.
+		 */
+		ap->offset = orig_offset;
+		ap->length = orig_length;
+		minlen = align = mp->m_sb.sb_rextsize;
+		goto retry;
+	}
+
+	if (!ignore_locality && ap->blkno != 0) {
+		/*
+		 * If we can't allocate near a specific rt extent, try again
+		 * without locality criteria.
+		 */
+		ignore_locality = true;
+		goto retry;
+	}
+
+	ap->blkno = NULLFSBLOCK;
+	ap->length = 0;
+	return 0;
+}

fs/xfs/xfs_rtalloc.h

@@ -12,27 +12,6 @@ struct xfs_mount;
 struct xfs_trans;
 
 #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_rtxnum_t		start,	/* starting rtext number to allocate */
-	xfs_rtxlen_t		minlen,	/* minimum length to allocate */
-	xfs_rtxlen_t		maxlen,	/* maximum length to allocate */
-	xfs_rtxlen_t		*len,	/* out: actual length allocated */
-	int			wasdel,	/* was a delayed allocation extent */
-	xfs_rtxlen_t		prod,	/* extent product factor */
-	xfs_rtxnum_t		*rtblock); /* out: start rtext allocated */
-
-
 /*
  * Initialize realtime fields in the mount structure.
  */
@@ -51,20 +30,6 @@ 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_rtxlen_t		len,	/* allocation length (rtextents) */
-	xfs_rtxnum_t		*pick);	/* result rt extent */
-
 /*
  * Grow the realtime area of the filesystem.
  */
@@ -75,8 +40,6 @@ xfs_growfs_rt(
 
 int xfs_rtalloc_reinit_frextents(struct xfs_mount *mp);
 #else
-# define xfs_rtallocate_extent(t,b,min,max,l,f,p,rb)	(-ENOSYS)
-# define xfs_rtpick_extent(m,t,l,rb)			(-ENOSYS)
 # define xfs_growfs_rt(mp,in)				(-ENOSYS)
 # define xfs_rtalloc_reinit_frextents(m)		(0)
 static inline int		/* error */