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GFS2: Use rbm for gfs2_setbit() 

Use the rbm structure for gfs2_setbit() in order to simplify the
arguments to the function. We have to add a bool to control whether
the clone bitmap should be updated (if it exists) but otherwise it
is a more or less direct substitution.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>
This commit is contained in:
Steven Whitehouse 2012-08-13 11:37:51 +01:00
parent c04a2ef3a8
commit 3e6339dd28
1 changed files with 20 additions and 26 deletions
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46
fs/gfs2/rgrp.c
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@ -69,47 +69,42 @@ static const char valid_change[16] = {
/**
* gfs2_setbit - Set a bit in the bitmaps
* @rgd: the resource group descriptor
* @buf2: the clone buffer that holds the bitmaps
* @bi: the bitmap structure
* @block: the block to set
* @rbm: The position of the bit to set
* @do_clone: Also set the clone bitmap, if it exists
* @new_state: the new state of the block
*
*/
static inline void gfs2_setbit(struct gfs2_rgrpd *rgd, unsigned char *buf2,
struct gfs2_bitmap *bi, u32 block,
static inline void gfs2_setbit(const struct gfs2_rbm *rbm, bool do_clone,
unsigned char new_state)
{
unsigned char *byte1, *byte2, *end, cur_state;
unsigned int buflen = bi->bi_len;
const unsigned int bit = (block % GFS2_NBBY) * GFS2_BIT_SIZE;
unsigned int buflen = rbm->bi->bi_len;
const unsigned int bit = (rbm->offset % GFS2_NBBY) * GFS2_BIT_SIZE;
byte1 = bi->bi_bh->b_data + bi->bi_offset + (block / GFS2_NBBY);
end = bi->bi_bh->b_data + bi->bi_offset + buflen;
byte1 = rbm->bi->bi_bh->b_data + rbm->bi->bi_offset + (rbm->offset / GFS2_NBBY);
end = rbm->bi->bi_bh->b_data + rbm->bi->bi_offset + buflen;
BUG_ON(byte1 >= end);
cur_state = (*byte1 >> bit) & GFS2_BIT_MASK;
if (unlikely(!valid_change[new_state * 4 + cur_state])) {
printk(KERN_WARNING "GFS2: buf_blk = 0x%llx old_state=%d, "
"new_state=%d\n",
(unsigned long long)block, cur_state, new_state);
printk(KERN_WARNING "GFS2: rgrp=0x%llx bi_start=0x%lx\n",
(unsigned long long)rgd->rd_addr,
(unsigned long)bi->bi_start);
printk(KERN_WARNING "GFS2: bi_offset=0x%lx bi_len=0x%lx\n",
(unsigned long)bi->bi_offset,
(unsigned long)bi->bi_len);
printk(KERN_WARNING "GFS2: buf_blk = 0x%x old_state=%d, "
"new_state=%d\n", rbm->offset, cur_state, new_state);
printk(KERN_WARNING "GFS2: rgrp=0x%llx bi_start=0x%x\n",
(unsigned long long)rbm->rgd->rd_addr,
rbm->bi->bi_start);
printk(KERN_WARNING "GFS2: bi_offset=0x%x bi_len=0x%x\n",
rbm->bi->bi_offset, rbm->bi->bi_len);
dump_stack();
gfs2_consist_rgrpd(rgd);
gfs2_consist_rgrpd(rbm->rgd);
return;
}
*byte1 ^= (cur_state ^ new_state) << bit;
if (buf2) {
byte2 = buf2 + bi->bi_offset + (block / GFS2_NBBY);
if (do_clone && rbm->bi->bi_clone) {
byte2 = rbm->bi->bi_clone + rbm->bi->bi_offset + (rbm->offset / GFS2_NBBY);
cur_state = (*byte2 >> bit) & GFS2_BIT_MASK;
*byte2 ^= (cur_state ^ new_state) << bit;
}
@ -1852,8 +1847,7 @@ static void gfs2_alloc_extent(const struct gfs2_rbm *rbm, bool dinode,
*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);
gfs2_setbit(rbm, true, dinode ? GFS2_BLKST_DINODE : GFS2_BLKST_USED);
block++;
while (*n < elen) {
ret = gfs2_rbm_from_block(&pos, block);
@ -1861,7 +1855,7 @@ static void gfs2_alloc_extent(const struct gfs2_rbm *rbm, bool dinode,
if (gfs2_testbit(&pos) != GFS2_BLKST_FREE)
break;
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);
gfs2_setbit(&pos, true, GFS2_BLKST_USED);
(*n)++;
block++;
}
@ -1900,7 +1894,7 @@ static struct gfs2_rgrpd *rgblk_free(struct gfs2_sbd *sdp, u64 bstart,
rbm.bi->bi_len);
}
gfs2_trans_add_bh(rbm.rgd->rd_gl, rbm.bi->bi_bh, 1);
gfs2_setbit(rbm.rgd, NULL, rbm.bi, rbm.offset, new_state);
gfs2_setbit(&rbm, false, new_state);
}
return rbm.rgd;