diff options
author | Andreas Gruenbacher <agruenba@redhat.com> | 2020-10-08 01:48:22 +0300 |
---|---|---|
committer | Andreas Gruenbacher <agruenba@redhat.com> | 2021-01-18 18:56:36 +0300 |
commit | 0eacdd16adc425e61926876f15b58008aa5c4784 (patch) | |
tree | 61a6f2628d4078c35066d84cb9e438cd6bed8171 /fs/gfs2 | |
parent | 19c329f6808995b142b3966301f217c831e7cf31 (diff) | |
download | linux-0eacdd16adc425e61926876f15b58008aa5c4784.tar.xz |
gfs2: Turn gfs2_rbm_incr into gfs2_rbm_add
Change gfs2_rbm_incr to advance an rbm by a given number of blocks. Use that
in gfs2_reservation_check_and_update to save a gfs2_rbm_to_block ->
gfs2_rbm_from_block round trip.
Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Diffstat (limited to 'fs/gfs2')
-rw-r--r-- | fs/gfs2/rgrp.c | 55 |
1 files changed, 33 insertions, 22 deletions
diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c index 5e8eef9990e3..47d171745f83 100644 --- a/fs/gfs2/rgrp.c +++ b/fs/gfs2/rgrp.c @@ -277,29 +277,38 @@ static int gfs2_rbm_from_block(struct gfs2_rbm *rbm, u64 block) } /** - * gfs2_rbm_incr - increment an rbm structure + * gfs2_rbm_add - add a number of blocks to an rbm * @rbm: The rbm with rgd already set correctly + * @blocks: The number of blocks to add to rpm * - * This function takes an existing rbm structure and increments it to the next - * viable block offset. - * - * Returns: If incrementing the offset would cause the rbm to go past the - * end of the rgrp, true is returned, otherwise false. + * This function takes an existing rbm structure and adds a number of blocks to + * it. * + * Returns: True if the new rbm would point past the end of the rgrp. */ -static bool gfs2_rbm_incr(struct gfs2_rbm *rbm) +static bool gfs2_rbm_add(struct gfs2_rbm *rbm, u32 blocks) { - if (rbm->offset + 1 < rbm_bi(rbm)->bi_blocks) { /* in the same bitmap */ - rbm->offset++; + struct gfs2_rgrpd *rgd = rbm->rgd; + struct gfs2_bitmap *bi = rgd->rd_bits + rbm->bii; + + if (rbm->offset + blocks < bi->bi_blocks) { + rbm->offset += blocks; return false; } - if (rbm->bii == rbm->rgd->rd_length - 1) /* at the last bitmap */ - return true; + blocks -= bi->bi_blocks - rbm->offset; - rbm->offset = 0; - rbm->bii++; - return false; + for(;;) { + bi++; + if (bi == rgd->rd_bits + rgd->rd_length) + return true; + if (blocks < bi->bi_blocks) { + rbm->offset = blocks; + rbm->bii = bi - rgd->rd_bits; + return false; + } + blocks -= bi->bi_blocks; + } } /** @@ -323,7 +332,7 @@ static bool gfs2_unaligned_extlen(struct gfs2_rbm *rbm, u32 n_unaligned, u32 *le (*len)--; if (*len == 0) return true; - if (gfs2_rbm_incr(rbm)) + if (gfs2_rbm_add(rbm, 1)) return true; } @@ -1639,7 +1648,6 @@ static int gfs2_reservation_check_and_update(struct gfs2_rbm *rbm, u64 block = gfs2_rbm_to_block(rbm); u32 extlen = 1; u64 nblock; - int ret; /* * If we have a minimum extent length, then skip over any extent @@ -1664,12 +1672,15 @@ static int gfs2_reservation_check_and_update(struct gfs2_rbm *rbm, maxext->len = extlen; maxext->rbm = *rbm; } -fail: - nblock = block + extlen; + } else { + u64 len = nblock - block; + if (len >= (u64)1 << 32) + return -E2BIG; + extlen = len; } - ret = gfs2_rbm_from_block(rbm, nblock); - if (ret < 0) - return ret; +fail: + if (gfs2_rbm_add(rbm, extlen)) + return -E2BIG; return 1; } @@ -2205,7 +2216,7 @@ static void rgblk_free(struct gfs2_sbd *sdp, struct gfs2_rgrpd *rgd, bi_prev = bi; } gfs2_setbit(&rbm, false, new_state); - gfs2_rbm_incr(&rbm); + gfs2_rbm_add(&rbm, 1); } } |