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xfs: provide helper for counting extents from if_bytes

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The open-coded pattern:

ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t)

is all over the xfs code; provide a new helper
xfs_iext_count(ifp) to count the number of inline extents
in an inode fork.

[dchinner: pick up several missed conversions]

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Brian Foster <bfoster@redhat.com>
Signed-off-by: Dave Chinner <david@fromorbit.com>
This commit is contained in:
Eric Sandeen
2016-11-08 12:59:42 +11:00
committed by Dave Chinner
parent 4dfce57db6
commit 5d829300be
8 changed files with 64 additions and 67 deletions
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49
fs/xfs/libxfs/xfs_bmap.c
View File

@@ -515,7 +515,7 @@ xfs_bmap_trace_exlist(
state |= BMAP_ATTRFORK;
ifp = XFS_IFORK_PTR(ip, whichfork);
ASSERT(cnt == (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t)));
ASSERT(cnt == xfs_iext_count(ifp));
for (idx = 0; idx < cnt; idx++)
trace_xfs_extlist(ip, idx, whichfork, caller_ip);
}
@@ -811,7 +811,7 @@ try_another_ag:
XFS_BTREE_LONG_PTRS);
arp = XFS_BMBT_REC_ADDR(mp, ablock, 1);
nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
nextents = xfs_iext_count(ifp);
for (cnt = i = 0; i < nextents; i++) {
ep = xfs_iext_get_ext(ifp, i);
if (!isnullstartblock(xfs_bmbt_get_startblock(ep))) {
@@ -1296,7 +1296,7 @@ xfs_bmap_read_extents(
/*
* Here with bp and block set to the leftmost leaf node in the tree.
*/
room = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
room = xfs_iext_count(ifp);
i = 0;
/*
* Loop over all leaf nodes. Copy information to the extent records.
@@ -1361,7 +1361,7 @@ xfs_bmap_read_extents(
return error;
block = XFS_BUF_TO_BLOCK(bp);
}
ASSERT(i == (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t)));
ASSERT(i == xfs_iext_count(ifp));
ASSERT(i == XFS_IFORK_NEXTENTS(ip, whichfork));
XFS_BMAP_TRACE_EXLIST(ip, i, whichfork);
return 0;
@@ -1404,7 +1404,7 @@ xfs_bmap_search_multi_extents(
if (lastx > 0) {
xfs_bmbt_get_all(xfs_iext_get_ext(ifp, lastx - 1), prevp);
}
if (lastx < (ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t))) {
if (lastx < xfs_iext_count(ifp)) {
xfs_bmbt_get_all(ep, gotp);
*eofp = 0;
} else {
@@ -1497,7 +1497,7 @@ xfs_bmap_first_unused(
(error = xfs_iread_extents(tp, ip, whichfork)))
return error;
lowest = *first_unused;
nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
nextents = xfs_iext_count(ifp);
for (idx = 0, lastaddr = 0, max = lowest; idx < nextents; idx++) {
xfs_bmbt_rec_host_t *ep = xfs_iext_get_ext(ifp, idx);
off = xfs_bmbt_get_startoff(ep);
@@ -1582,7 +1582,7 @@ xfs_bmap_last_extent(
return error;
}
nextents = ifp->if_bytes / sizeof(xfs_bmbt_rec_t);
nextents = xfs_iext_count(ifp);
if (nextents == 0) {
*is_empty = 1;
return 0;
@@ -1735,7 +1735,7 @@ xfs_bmap_add_extent_delay_real(
&bma->ip->i_d.di_nextents);
ASSERT(bma->idx >= 0);
ASSERT(bma->idx <= ifp->if_bytes / sizeof(struct xfs_bmbt_rec));
ASSERT(bma->idx <= xfs_iext_count(ifp));
ASSERT(!isnullstartblock(new->br_startblock));
ASSERT(!bma->cur ||
(bma->cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL));
@@ -1794,7 +1794,7 @@ xfs_bmap_add_extent_delay_real(
* Don't set contiguous if the combined extent would be too large.
* Also check for all-three-contiguous being too large.
*/
if (bma->idx < ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t) - 1) {
if (bma->idx < xfs_iext_count(ifp) - 1) {
state |= BMAP_RIGHT_VALID;
xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx + 1), &RIGHT);
@@ -2300,7 +2300,7 @@ xfs_bmap_add_extent_unwritten_real(
ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
ASSERT(*idx >= 0);
ASSERT(*idx <= ifp->if_bytes / sizeof(struct xfs_bmbt_rec));
ASSERT(*idx <= xfs_iext_count(ifp));
ASSERT(!isnullstartblock(new->br_startblock));
XFS_STATS_INC(mp, xs_add_exlist);
@@ -2356,7 +2356,7 @@ xfs_bmap_add_extent_unwritten_real(
* Don't set contiguous if the combined extent would be too large.
* Also check for all-three-contiguous being too large.
*/
if (*idx < ip->i_df.if_bytes / (uint)sizeof(xfs_bmbt_rec_t) - 1) {
if (*idx < xfs_iext_count(&ip->i_df) - 1) {
state |= BMAP_RIGHT_VALID;
xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *idx + 1), &RIGHT);
if (isnullstartblock(RIGHT.br_startblock))
@@ -2836,7 +2836,7 @@ xfs_bmap_add_extent_hole_delay(
* Check and set flags if the current (right) segment exists.
* If it doesn't exist, we're converting the hole at end-of-file.
*/
if (*idx < ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t)) {
if (*idx < xfs_iext_count(ifp)) {
state |= BMAP_RIGHT_VALID;
xfs_bmbt_get_all(xfs_iext_get_ext(ifp, *idx), &right);
@@ -2966,7 +2966,7 @@ xfs_bmap_add_extent_hole_real(
ifp = XFS_IFORK_PTR(bma->ip, whichfork);
ASSERT(bma->idx >= 0);
ASSERT(bma->idx <= ifp->if_bytes / sizeof(struct xfs_bmbt_rec));
ASSERT(bma->idx <= xfs_iext_count(ifp));
ASSERT(!isnullstartblock(new->br_startblock));
ASSERT(!bma->cur ||
!(bma->cur->bc_private.b.flags & XFS_BTCUR_BPRV_WASDEL));
@@ -2992,7 +2992,7 @@ xfs_bmap_add_extent_hole_real(
* Check and set flags if this segment has a current value.
* Not true if we're inserting into the "hole" at eof.
*/
if (bma->idx < ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t)) {
if (bma->idx < xfs_iext_count(ifp)) {
state |= BMAP_RIGHT_VALID;
xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma->idx), &right);
if (isnullstartblock(right.br_startblock))
@@ -4221,7 +4221,7 @@ xfs_bmapi_read(
break;
/* Else go on to the next record. */
if (++lastx < ifp->if_bytes / sizeof(xfs_bmbt_rec_t))
if (++lastx < xfs_iext_count(ifp))
xfs_bmbt_get_all(xfs_iext_get_ext(ifp, lastx), &got);
else
eof = 1;
@@ -4733,7 +4733,7 @@ xfs_bmapi_write(
/* Else go on to the next record. */
bma.prev = bma.got;
if (++bma.idx < ifp->if_bytes / sizeof(xfs_bmbt_rec_t)) {
if (++bma.idx < xfs_iext_count(ifp)) {
xfs_bmbt_get_all(xfs_iext_get_ext(ifp, bma.idx),
&bma.got);
} else
@@ -4885,7 +4885,7 @@ xfs_bmap_del_extent_delay(
da_new = 0;
ASSERT(*idx >= 0);
ASSERT(*idx < ifp->if_bytes / sizeof(struct xfs_bmbt_rec));
ASSERT(*idx <= xfs_iext_count(ifp));
ASSERT(del->br_blockcount > 0);
ASSERT(got->br_startoff <= del->br_startoff);
ASSERT(got_endoff >= del_endoff);
@@ -5013,7 +5013,7 @@ xfs_bmap_del_extent_cow(
got_endoff = got->br_startoff + got->br_blockcount;
ASSERT(*idx >= 0);
ASSERT(*idx < ifp->if_bytes / sizeof(struct xfs_bmbt_rec));
ASSERT(*idx <= xfs_iext_count(ifp));
ASSERT(del->br_blockcount > 0);
ASSERT(got->br_startoff <= del->br_startoff);
ASSERT(got_endoff >= del_endoff);
@@ -5119,8 +5119,7 @@ xfs_bmap_del_extent(
state |= BMAP_COWFORK;
ifp = XFS_IFORK_PTR(ip, whichfork);
ASSERT((*idx >= 0) && (*idx < ifp->if_bytes /
(uint)sizeof(xfs_bmbt_rec_t)));
ASSERT((*idx >= 0) && (*idx < xfs_iext_count(ifp)));
ASSERT(del->br_blockcount > 0);
ep = xfs_iext_get_ext(ifp, *idx);
xfs_bmbt_get_all(ep, &got);
@@ -5445,7 +5444,6 @@ __xfs_bunmapi(
int logflags; /* transaction logging flags */
xfs_extlen_t mod; /* rt extent offset */
xfs_mount_t *mp; /* mount structure */
xfs_extnum_t nextents; /* number of file extents */
xfs_bmbt_irec_t prev; /* previous extent record */
xfs_fileoff_t start; /* first file offset deleted */
int tmp_logflags; /* partial logging flags */
@@ -5477,8 +5475,7 @@ __xfs_bunmapi(
if (!(ifp->if_flags & XFS_IFEXTENTS) &&
(error = xfs_iread_extents(tp, ip, whichfork)))
return error;
nextents = ifp->if_bytes / (uint)sizeof(xfs_bmbt_rec_t);
if (nextents == 0) {
if (xfs_iext_count(ifp) == 0) {
*rlen = 0;
return 0;
}
@@ -5963,7 +5960,7 @@ xfs_bmse_shift_one(
mp = ip->i_mount;
ifp = XFS_IFORK_PTR(ip, whichfork);
total_extents = ifp->if_bytes / sizeof(xfs_bmbt_rec_t);
total_extents = xfs_iext_count(ifp);
xfs_bmbt_get_all(gotp, &got);
@@ -6140,7 +6137,7 @@ xfs_bmap_shift_extents(
* are collapsing out, so we cannot use the count of real extents here.
* Instead we have to calculate it from the incore fork.
*/
total_extents = ifp->if_bytes / sizeof(xfs_bmbt_rec_t);
total_extents = xfs_iext_count(ifp);
if (total_extents == 0) {
*done = 1;
goto del_cursor;
@@ -6200,7 +6197,7 @@ xfs_bmap_shift_extents(
* count can change. Update the total and grade the next record.
*/
if (direction == SHIFT_LEFT) {
total_extents = ifp->if_bytes / sizeof(xfs_bmbt_rec_t);
total_extents = xfs_iext_count(ifp);
stop_extent = total_extents;
}