diff options
| -rw-r--r-- | fs/gfs2/rgrp.c | 72 |
1 files changed, 28 insertions, 44 deletions
diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c index 47d2346575ad..3a288cec5af0 100644 --- 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; |