GFS2: Use rbm for gfs2_testbit()

Change the arguments to gfs2_testbit() so that it now just takes an
rbm specifying the position of the two bit entry to return.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c
index 47d2346575ad017df3ea4ca3750aaef6c3085cc5..3a288cec5af0b7a3dd54c1695314de285d882274 100644 (file)
--- a/fs/gfs2/rgrp.c
+++ b/fs/gfs2/rgrp.c
@@ -117,30 +117,21 @@ static inline void gfs2_setbit(struct gfs2_rgrpd *rgd, unsigned char *buf2,
 
 /**
  * gfs2_testbit - test a bit in the bitmaps
- * @rgd: the resource group descriptor
- * @buffer: the buffer that holds the bitmaps
- * @buflen: the length (in bytes) of the buffer
- * @block: the block to read
+ * @rbm: The bit to test
  *
+ * Returns: The two bit block state of the requested bit
  */
 
-static inline unsigned char gfs2_testbit(struct gfs2_rgrpd *rgd,
-                                        const unsigned char *buffer,
-                                        unsigned int buflen, u32 block)
+static inline u8 gfs2_testbit(const struct gfs2_rbm *rbm)
 {
-       const unsigned char *byte, *end;
-       unsigned char cur_state;
+       const u8 *buffer = rbm->bi->bi_bh->b_data + rbm->bi->bi_offset;
+       const u8 *byte;
        unsigned int bit;
 
-       byte = buffer + (block / GFS2_NBBY);
-       bit = (block % GFS2_NBBY) * GFS2_BIT_SIZE;
-       end = buffer + buflen;
-
-       gfs2_assert(rgd->rd_sbd, byte < end);
-
-       cur_state = (*byte >> bit) & GFS2_BIT_MASK;
+       byte = buffer + (rbm->offset / GFS2_NBBY);
+       bit = (rbm->offset % GFS2_NBBY) * GFS2_BIT_SIZE;
 
-       return cur_state;
+       return (*byte >> bit) & GFS2_BIT_MASK;
 }
 
 /**
@@ -1837,8 +1828,7 @@ static unsigned char gfs2_get_block_type(struct gfs2_rgrpd *rgd, u64 block)
        ret = gfs2_rbm_from_block(&rbm, block);
        WARN_ON_ONCE(ret != 0);
 
-       return gfs2_testbit(rgd, rbm.bi->bi_bh->b_data + rbm.bi->bi_offset,
-                           rbm.bi->bi_len, rbm.offset);
+       return gfs2_testbit(&rbm);
 }
 
 
@@ -1846,42 +1836,35 @@ static unsigned char gfs2_get_block_type(struct gfs2_rgrpd *rgd, u64 block)
  * gfs2_alloc_extent - allocate an extent from a given bitmap
  * @rbm: the resource group information
  * @dinode: TRUE if the first block we allocate is for a dinode
- * @n: The extent length
+ * @n: The extent length (value/result)
  *
- * Add the found bitmap buffer to the transaction.
+ * Add the bitmap buffer to the transaction.
  * Set the found bits to @new_state to change block's allocation state.
- * Returns: starting block number of the extent (fs scope)
  */
-static u64 gfs2_alloc_extent(const struct gfs2_rbm *rbm, bool dinode,
+static void gfs2_alloc_extent(const struct gfs2_rbm *rbm, bool dinode,
                             unsigned int *n)
 {
-       struct gfs2_rgrpd *rgd = rbm->rgd;
-       struct gfs2_bitmap *bi = rbm->bi;
-       u32 blk = rbm->offset;
+       struct gfs2_rbm pos = { .rgd = rbm->rgd, };
        const unsigned int elen = *n;
-       u32 goal;
-       const u8 *buffer = NULL;
+       u64 block;
+       int ret;
 
-       *n = 0;
-       buffer = bi->bi_bh->b_data + bi->bi_offset;
-       gfs2_trans_add_bh(rgd->rd_gl, bi->bi_bh, 1);
-       gfs2_setbit(rgd, bi->bi_clone, bi, blk,
+       *n = 1;
+       block = gfs2_rbm_to_block(rbm);
+       gfs2_trans_add_bh(rbm->rgd->rd_gl, rbm->bi->bi_bh, 1);
+       gfs2_setbit(rbm->rgd, rbm->bi->bi_clone, rbm->bi, rbm->offset,
                    dinode ? GFS2_BLKST_DINODE : GFS2_BLKST_USED);
-       (*n)++;
-       goal = blk;
+       block++;
        while (*n < elen) {
-               goal++;
-               if (goal >= (bi->bi_len * GFS2_NBBY))
-                       break;
-               if (gfs2_testbit(rgd, buffer, bi->bi_len, goal) !=
-                   GFS2_BLKST_FREE)
+               ret = gfs2_rbm_from_block(&pos, block);
+               WARN_ON(ret);
+               if (gfs2_testbit(&pos) != GFS2_BLKST_FREE)
                        break;
-               gfs2_setbit(rgd, bi->bi_clone, bi, goal, GFS2_BLKST_USED);
+               gfs2_trans_add_bh(pos.rgd->rd_gl, pos.bi->bi_bh, 1);
+               gfs2_setbit(pos.rgd, pos.bi->bi_clone, pos.bi, pos.offset, GFS2_BLKST_USED);
                (*n)++;
+               block++;
        }
-       blk = gfs2_bi2rgd_blk(bi, blk);
-       rgd->rd_last_alloc = blk + *n - 1;
-       return rgd->rd_data0 + blk;
 }
 
 /**
@@ -2042,7 +2025,8 @@ int gfs2_alloc_blocks(struct gfs2_inode *ip, u64 *bn, unsigned int *nblocks,
                goto rgrp_error;
        }
 
-       block = gfs2_alloc_extent(&rbm, dinode, nblocks);
+       gfs2_alloc_extent(&rbm, dinode, nblocks);
+       block = gfs2_rbm_to_block(&rbm);
        if (gfs2_rs_active(ip->i_res))
                gfs2_adjust_reservation(ip, &rbm, *nblocks);
        ndata = *nblocks;