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xfs: fix xfs_rtalloc_rec units

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All the realtime allocation functions deal with space on the rtdev in
units of realtime extents.  However, struct xfs_rtalloc_rec confusingly
uses the word 'block' in the name, even though they're really extents.

Fix the naming problem and fix all the unit handling problems in the two
existing users.

Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
Reviewed-by: Allison Henderson <allison.henderson@oracle.com>
Reviewed-by: Bill O'Donnell <billodo@redhat.com>
This commit is contained in:
Darrick J. Wong 2018-05-31 09:12:10 -07:00
parent 8ad560d256
commit a0e5c435ba
4 changed files with 46 additions and 26 deletions
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26
fs/xfs/libxfs/xfs_rtbitmap.c
View File

@ -1036,17 +1036,17 @@ xfs_rtalloc_query_range(
int is_free;
int error = 0;
if (low_rec->ar_startblock > high_rec->ar_startblock)
if (low_rec->ar_startext > high_rec->ar_startext)
return -EINVAL;
if (low_rec->ar_startblock >= mp->m_sb.sb_rextents ||
low_rec->ar_startblock == high_rec->ar_startblock)
if (low_rec->ar_startext >= mp->m_sb.sb_rextents ||
low_rec->ar_startext == high_rec->ar_startext)
return 0;
if (high_rec->ar_startblock >= mp->m_sb.sb_rextents)
high_rec->ar_startblock = mp->m_sb.sb_rextents - 1;
if (high_rec->ar_startext >= mp->m_sb.sb_rextents)
high_rec->ar_startext = mp->m_sb.sb_rextents - 1;
/* Iterate the bitmap, looking for discrepancies. */
rtstart = low_rec->ar_startblock;
rem = high_rec->ar_startblock - rtstart;
rtstart = low_rec->ar_startext;
rem = high_rec->ar_startext - rtstart;
while (rem) {
/* Is the first block free? */
error = xfs_rtcheck_range(mp, tp, rtstart, 1, 1, &rtend,
@ -1056,13 +1056,13 @@ xfs_rtalloc_query_range(
/* How long does the extent go for? */
error = xfs_rtfind_forw(mp, tp, rtstart,
high_rec->ar_startblock - 1, &rtend);
high_rec->ar_startext - 1, &rtend);
if (error)
break;
if (is_free) {
rec.ar_startblock = rtstart;
rec.ar_blockcount = rtend - rtstart + 1;
rec.ar_startext = rtstart;
rec.ar_extcount = rtend - rtstart + 1;
error = fn(tp, &rec, priv);
if (error)
@ -1085,9 +1085,9 @@ xfs_rtalloc_query_all(
{
struct xfs_rtalloc_rec keys[2];
keys[0].ar_startblock = 0;
keys[1].ar_startblock = tp->t_mountp->m_sb.sb_rextents - 1;
keys[0].ar_blockcount = keys[1].ar_blockcount = 0;
keys[0].ar_startext = 0;
keys[1].ar_startext = tp->t_mountp->m_sb.sb_rextents - 1;
keys[0].ar_extcount = keys[1].ar_extcount = 0;
return xfs_rtalloc_query_range(tp, &keys[0], &keys[1], fn, priv);
}

23
fs/xfs/scrub/rtbitmap.c
View File

@ -66,11 +66,15 @@ xfs_scrub_rtbitmap_rec(
void *priv)
{
struct xfs_scrub_context *sc = priv;
xfs_rtblock_t startblock;
xfs_rtblock_t blockcount;
if (rec->ar_startblock + rec->ar_blockcount <= rec->ar_startblock ||
!xfs_verify_rtbno(sc->mp, rec->ar_startblock) ||
!xfs_verify_rtbno(sc->mp, rec->ar_startblock +
rec->ar_blockcount - 1))
startblock = rec->ar_startext * tp->t_mountp->m_sb.sb_rextsize;
blockcount = rec->ar_extcount * tp->t_mountp->m_sb.sb_rextsize;
if (startblock + blockcount <= startblock ||
!xfs_verify_rtbno(sc->mp, startblock) ||
!xfs_verify_rtbno(sc->mp, startblock + blockcount - 1))
xfs_scrub_fblock_set_corrupt(sc, XFS_DATA_FORK, 0);
return 0;
}
@ -139,14 +143,23 @@ xfs_scrub_xref_is_used_rt_space(
xfs_rtblock_t fsbno,
xfs_extlen_t len)
{
xfs_rtblock_t startext;
xfs_rtblock_t endext;
xfs_rtblock_t extcount;
bool is_free;
int error;
if (xfs_scrub_skip_xref(sc->sm))
return;
startext = fsbno;
endext = fsbno + len - 1;
do_div(startext, sc->mp->m_sb.sb_rextsize);
if (do_div(endext, sc->mp->m_sb.sb_rextsize))
endext++;
extcount = endext - startext;
xfs_ilock(sc->mp->m_rbmip, XFS_ILOCK_SHARED | XFS_ILOCK_RTBITMAP);
error = xfs_rtalloc_extent_is_free(sc->mp, sc->tp, fsbno, len,
error = xfs_rtalloc_extent_is_free(sc->mp, sc->tp, startext, extcount,
&is_free);
if (!xfs_scrub_should_check_xref(sc, &error, NULL))
goto out_unlock;

14
fs/xfs/xfs_fsmap.c
View File

@ -465,10 +465,9 @@ xfs_getfsmap_rtdev_rtbitmap_helper(
struct xfs_rmap_irec irec;
xfs_daddr_t rec_daddr;
rec_daddr = XFS_FSB_TO_BB(mp, rec->ar_startblock);
irec.rm_startblock = rec->ar_startblock;
irec.rm_blockcount = rec->ar_blockcount;
irec.rm_startblock = rec->ar_startext * mp->m_sb.sb_rextsize;
rec_daddr = XFS_FSB_TO_BB(mp, irec.rm_startblock);
irec.rm_blockcount = rec->ar_extcount * mp->m_sb.sb_rextsize;
irec.rm_owner = XFS_RMAP_OWN_NULL; /* "free" */
irec.rm_offset = 0;
irec.rm_flags = 0;
@ -534,8 +533,11 @@ xfs_getfsmap_rtdev_rtbitmap_query(
xfs_ilock(tp->t_mountp->m_rbmip, XFS_ILOCK_SHARED);
alow.ar_startblock = info->low.rm_startblock;
ahigh.ar_startblock = info->high.rm_startblock;
alow.ar_startext = info->low.rm_startblock;
ahigh.ar_startext = info->high.rm_startblock;
do_div(alow.ar_startext, tp->t_mountp->m_sb.sb_rextsize);
if (do_div(ahigh.ar_startext, tp->t_mountp->m_sb.sb_rextsize))
ahigh.ar_startext++;
error = xfs_rtalloc_query_range(tp, &alow, &ahigh,
xfs_getfsmap_rtdev_rtbitmap_helper, info);
if (error)

9
fs/xfs/xfs_rtalloc.h
View File

@ -23,9 +23,14 @@
struct xfs_mount;
struct xfs_trans;
/*
* XXX: Most of the realtime allocation functions deal in units of realtime
* extents, not realtime blocks. This looks funny when paired with the type
* name and screams for a larger cleanup.
*/
struct xfs_rtalloc_rec {
xfs_rtblock_t ar_startblock;
xfs_rtblock_t ar_blockcount;
xfs_rtblock_t ar_startext;
xfs_rtblock_t ar_extcount;
};
typedef int (*xfs_rtalloc_query_range_fn)(