[PATCH 03/43] xfs: move xfs_bmapi_reserve_delalloc to xfs_iomap.c

Christoph Hellwig
2025-02-06T06:45:21Z

Delalloc reservations are not supported in userspace, and thus it doesn't
make sense to share this helper with xfsprogs.c. Move it to xfs_iomap.c
toward the two callers.

Note that there rest of the delalloc handling should probably eventually
also move out of xfs_bmap.c, but that will require a bit more surgery.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
fs/xfs/libxfs/xfs_bmap.c | 295 +--------------------------------------
fs/xfs/libxfs/xfs_bmap.h | 5 +-
fs/xfs/xfs_iomap.c | 279 ++++++++++++++++++++++++++++++++++++
3 files changed, 287 insertions(+), 292 deletions(-)

diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c
index 0ef19f1469ec..5b17e59ed5b8 100644
--- a/fs/xfs/libxfs/xfs_bmap.c
+++ b/fs/xfs/libxfs/xfs_bmap.c
@@ -34,7 +34,6 @@
#include "xfs_ag.h"
#include "xfs_ag_resv.h"
#include "xfs_refcount.h"
-#include "xfs_icache.h"
#include "xfs_iomap.h"
#include "xfs_health.h"
#include "xfs_bmap_item.h"
@@ -171,18 +170,16 @@ xfs_bmbt_update(
* Compute the worst-case number of indirect blocks that will be used
* for ip's delayed extent of length "len".
*/
-STATIC xfs_filblks_t
+xfs_filblks_t
xfs_bmap_worst_indlen(
- xfs_inode_t *ip, /* incore inode pointer */
- xfs_filblks_t len) /* delayed extent length */
+ struct xfs_inode *ip, /* incore inode pointer */
+ xfs_filblks_t len) /* delayed extent length */
{
- int level; /* btree level number */
- int maxrecs; /* maximum record count at this level */
- xfs_mount_t *mp; /* mount structure */
- xfs_filblks_t rval; /* return value */
+ struct xfs_mount *mp = ip->i_mount;
+ int maxrecs = mp->m_bmap_dmxr[0];
+ int level;
+ xfs_filblks_t rval;

- mp = ip->i_mount;
- maxrecs = mp->m_bmap_dmxr[0];
for (level = 0, rval = 0;
level < XFS_BM_MAXLEVELS(mp, XFS_DATA_FORK);
level++) {
@@ -2571,146 +2568,6 @@ xfs_bmap_add_extent_unwritten_real(
#undef PREV
}

-/*
- * Convert a hole to a delayed allocation.
- */
-STATIC void
-xfs_bmap_add_extent_hole_delay(
- xfs_inode_t *ip, /* incore inode pointer */
- int whichfork,
- struct xfs_iext_cursor *icur,
- xfs_bmbt_irec_t *new) /* new data to add to file extents */
-{
- struct xfs_ifork *ifp; /* inode fork pointer */
- xfs_bmbt_irec_t left; /* left neighbor extent entry */
- xfs_filblks_t newlen=0; /* new indirect size */
- xfs_filblks_t oldlen=0; /* old indirect size */
- xfs_bmbt_irec_t right; /* right neighbor extent entry */
- uint32_t state = xfs_bmap_fork_to_state(whichfork);
- xfs_filblks_t temp; /* temp for indirect calculations */
-
- ifp = xfs_ifork_ptr(ip, whichfork);
- ASSERT(isnullstartblock(new->br_startblock));
-
- /*
- * Check and set flags if this segment has a left neighbor
- */
- if (xfs_iext_peek_prev_extent(ifp, icur, &left)) {
- state |= BMAP_LEFT_VALID;
- if (isnullstartblock(left.br_startblock))
- state |= BMAP_LEFT_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 (xfs_iext_get_extent(ifp, icur, &right)) {
- state |= BMAP_RIGHT_VALID;
- if (isnullstartblock(right.br_startblock))
- state |= BMAP_RIGHT_DELAY;
- }
-
- /*
- * Set contiguity flags on the left and right neighbors.
- * Don't let extents get too large, even if the pieces are contiguous.
- */
- if ((state & BMAP_LEFT_VALID) && (state & BMAP_LEFT_DELAY) &&
- left.br_startoff + left.br_blockcount == new->br_startoff &&
- left.br_blockcount + new->br_blockcount <= XFS_MAX_BMBT_EXTLEN)
- state |= BMAP_LEFT_CONTIG;
-
- if ((state & BMAP_RIGHT_VALID) && (state & BMAP_RIGHT_DELAY) &&
- new->br_startoff + new->br_blockcount == right.br_startoff &&
- new->br_blockcount + right.br_blockcount <= XFS_MAX_BMBT_EXTLEN &&
- (!(state & BMAP_LEFT_CONTIG) ||
- (left.br_blockcount + new->br_blockcount +
- right.br_blockcount <= XFS_MAX_BMBT_EXTLEN)))
- state |= BMAP_RIGHT_CONTIG;
-
- /*
- * Switch out based on the contiguity flags.
- */
- switch (state & (BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG)) {
- case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG:
- /*
- * New allocation is contiguous with delayed allocations
- * on the left and on the right.
- * Merge all three into a single extent record.
- */
- temp = left.br_blockcount + new->br_blockcount +
- right.br_blockcount;
-
- oldlen = startblockval(left.br_startblock) +
- startblockval(new->br_startblock) +
- startblockval(right.br_startblock);
- newlen = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
- oldlen);
- left.br_startblock = nullstartblock(newlen);
- left.br_blockcount = temp;
-
- xfs_iext_remove(ip, icur, state);
- xfs_iext_prev(ifp, icur);
- xfs_iext_update_extent(ip, state, icur, &left);
- break;
-
- case BMAP_LEFT_CONTIG:
- /*
- * New allocation is contiguous with a delayed allocation
- * on the left.
- * Merge the new allocation with the left neighbor.
- */
- temp = left.br_blockcount + new->br_blockcount;
-
- oldlen = startblockval(left.br_startblock) +
- startblockval(new->br_startblock);
- newlen = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
- oldlen);
- left.br_blockcount = temp;
- left.br_startblock = nullstartblock(newlen);
-
- xfs_iext_prev(ifp, icur);
- xfs_iext_update_extent(ip, state, icur, &left);
- break;
-
- case BMAP_RIGHT_CONTIG:
- /*
- * New allocation is contiguous with a delayed allocation
- * on the right.
- * Merge the new allocation with the right neighbor.
- */
- temp = new->br_blockcount + right.br_blockcount;
- oldlen = startblockval(new->br_startblock) +
- startblockval(right.br_startblock);
- newlen = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
- oldlen);
- right.br_startoff = new->br_startoff;
- right.br_startblock = nullstartblock(newlen);
- right.br_blockcount = temp;
- xfs_iext_update_extent(ip, state, icur, &right);
- break;
-
- case 0:
- /*
- * New allocation is not contiguous with another
- * delayed allocation.
- * Insert a new entry.
- */
- oldlen = newlen = 0;
- xfs_iext_insert(ip, icur, new, state);
- break;
- }
- if (oldlen != newlen) {
- ASSERT(oldlen > newlen);
- xfs_add_fdblocks(ip->i_mount, oldlen - newlen);
-
- /*
- * Nothing to do for disk quota accounting here.
- */
- xfs_mod_delalloc(ip, 0, (int64_t)newlen - oldlen);
- }
-}
-
/*
* Convert a hole to a real allocation.
*/
@@ -4039,144 +3896,6 @@ xfs_bmapi_read(
return 0;
}

-/*
- * Add a delayed allocation extent to an inode. Blocks are reserved from the
- * global pool and the extent inserted into the inode in-core extent tree.
- *
- * On entry, got refers to the first extent beyond the offset of the extent to
- * allocate or eof is specified if no such extent exists. On return, got refers
- * to the extent record that was inserted to the inode fork.
- *
- * Note that the allocated extent may have been merged with contiguous extents
- * during insertion into the inode fork. Thus, got does not reflect the current
- * state of the inode fork on return. If necessary, the caller can use lastx to
- * look up the updated record in the inode fork.
- */
-int
-xfs_bmapi_reserve_delalloc(
- struct xfs_inode *ip,
- int whichfork,
- xfs_fileoff_t off,
- xfs_filblks_t len,
- xfs_filblks_t prealloc,
- struct xfs_bmbt_irec *got,
- struct xfs_iext_cursor *icur,
- int eof)
-{
- struct xfs_mount *mp = ip->i_mount;
- struct xfs_ifork *ifp = xfs_ifork_ptr(ip, whichfork);
- xfs_extlen_t alen;
- xfs_extlen_t indlen;
- uint64_t fdblocks;
- int error;
- xfs_fileoff_t aoff;
- bool use_cowextszhint =
- whichfork == XFS_COW_FORK && !prealloc;
-
-retry:
- /*
- * Cap the alloc length. Keep track of prealloc so we know whether to
- * tag the inode before we return.
- */
- aoff = off;
- alen = XFS_FILBLKS_MIN(len + prealloc, XFS_MAX_BMBT_EXTLEN);
- if (!eof)
- alen = XFS_FILBLKS_MIN(alen, got->br_startoff - aoff);
- if (prealloc && alen >= len)
- prealloc = alen - len;
-
- /*
- * If we're targetting the COW fork but aren't creating a speculative
- * posteof preallocation, try to expand the reservation to align with
- * the COW extent size hint if there's sufficient free space.
- *
- * Unlike the data fork, the CoW cancellation functions will free all
- * the reservations at inactivation, so we don't require that every
- * delalloc reservation have a dirty pagecache.
- */
- if (use_cowextszhint) {
- struct xfs_bmbt_irec prev;
- xfs_extlen_t extsz = xfs_get_cowextsz_hint(ip);
-
- if (!xfs_iext_peek_prev_extent(ifp, icur, &prev))
- prev.br_startoff = NULLFILEOFF;
-
- error = xfs_bmap_extsize_align(mp, got, &prev, extsz, 0, eof,
- 1, 0, &aoff, &alen);
- ASSERT(!error);
- }
-
- /*
- * Make a transaction-less quota reservation for delayed allocation
- * blocks. This number gets adjusted later. We return if we haven't
- * allocated blocks already inside this loop.
- */
- error = xfs_quota_reserve_blkres(ip, alen);
- if (error)
- goto out;
-
- /*
- * Split changing sb for alen and indlen since they could be coming
- * from different places.
- */
- indlen = (xfs_extlen_t)xfs_bmap_worst_indlen(ip, alen);
- ASSERT(indlen > 0);
-
- fdblocks = indlen;
- if (XFS_IS_REALTIME_INODE(ip)) {
- error = xfs_dec_frextents(mp, xfs_blen_to_rtbxlen(mp, alen));
- if (error)
- goto out_unreserve_quota;
- } else {
- fdblocks += alen;
- }
-
- error = xfs_dec_fdblocks(mp, fdblocks, false);
- if (error)
- goto out_unreserve_frextents;
-
- ip->i_delayed_blks += alen;
- xfs_mod_delalloc(ip, alen, indlen);
-
- got->br_startoff = aoff;
- got->br_startblock = nullstartblock(indlen);
- got->br_blockcount = alen;
- got->br_state = XFS_EXT_NORM;
-
- xfs_bmap_add_extent_hole_delay(ip, whichfork, icur, got);
-
- /*
- * Tag the inode if blocks were preallocated. Note that COW fork
- * preallocation can occur at the start or end of the extent, even when
- * prealloc == 0, so we must also check the aligned offset and length.
- */
- if (whichfork == XFS_DATA_FORK && prealloc)
- xfs_inode_set_eofblocks_tag(ip);
- if (whichfork == XFS_COW_FORK && (prealloc || aoff < off || alen > len))
- xfs_inode_set_cowblocks_tag(ip);
-
- return 0;
-
-out_unreserve_frextents:
- if (XFS_IS_REALTIME_INODE(ip))
- xfs_add_frextents(mp, xfs_blen_to_rtbxlen(mp, alen));
-out_unreserve_quota:
- if (XFS_IS_QUOTA_ON(mp))
- xfs_quota_unreserve_blkres(ip, alen);
-out:
- if (error == -ENOSPC || error == -EDQUOT) {
- trace_xfs_delalloc_enospc(ip, off, len);
-
- if (prealloc || use_cowextszhint) {
- /* retry without any preallocation */
- use_cowextszhint = false;
- prealloc = 0;
- goto retry;
- }
- }
- return error;
-}
-
static int
xfs_bmapi_allocate(
struct xfs_bmalloca *bma)
diff --git a/fs/xfs/libxfs/xfs_bmap.h b/fs/xfs/libxfs/xfs_bmap.h
index 4b721d935994..4d48087fd3a8 100644
--- a/fs/xfs/libxfs/xfs_bmap.h
+++ b/fs/xfs/libxfs/xfs_bmap.h
@@ -219,10 +219,6 @@ int xfs_bmap_insert_extents(struct xfs_trans *tp, struct xfs_inode *ip,
bool *done, xfs_fileoff_t stop_fsb);
int xfs_bmap_split_extent(struct xfs_trans *tp, struct xfs_inode *ip,
xfs_fileoff_t split_offset);
-int xfs_bmapi_reserve_delalloc(struct xfs_inode *ip, int whichfork,
- xfs_fileoff_t off, xfs_filblks_t len, xfs_filblks_t prealloc,
- struct xfs_bmbt_irec *got, struct xfs_iext_cursor *cur,
- int eof);
int xfs_bmapi_convert_delalloc(struct xfs_inode *ip, int whichfork,
xfs_off_t offset, struct iomap *iomap, unsigned int *seq);
int xfs_bmap_add_extent_unwritten_real(struct xfs_trans *tp,
@@ -233,6 +229,7 @@ xfs_extlen_t xfs_bmapi_minleft(struct xfs_trans *tp, struct xfs_inode *ip,
int fork);
int xfs_bmap_btalloc_low_space(struct xfs_bmalloca *ap,
struct xfs_alloc_arg *args);
+xfs_filblks_t xfs_bmap_worst_indlen(struct xfs_inode *ip, xfs_filblks_t len);

enum xfs_bmap_intent_type {
XFS_BMAP_MAP = 1,
diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c
index 46acf727cbe7..9cdfedf3b8e0 100644
--- a/fs/xfs/xfs_iomap.c
+++ b/fs/xfs/xfs_iomap.c
@@ -30,6 +30,7 @@
#include "xfs_reflink.h"
#include "xfs_health.h"
#include "xfs_rtbitmap.h"
+#include "xfs_icache.h"

#define XFS_ALLOC_ALIGN(mp, off) \
(((off) >> mp->m_allocsize_log) << mp->m_allocsize_log)
@@ -987,6 +988,284 @@ const struct iomap_ops xfs_dax_write_iomap_ops = {
.iomap_end = xfs_dax_write_iomap_end,
};

+/*
+ * Convert a hole to a delayed allocation.
+ */
+static void
+xfs_bmap_add_extent_hole_delay(
+ struct xfs_inode *ip, /* incore inode pointer */
+ int whichfork,
+ struct xfs_iext_cursor *icur,
+ struct xfs_bmbt_irec *new) /* new data to add to file extents */
+{
+ struct xfs_ifork *ifp; /* inode fork pointer */
+ xfs_bmbt_irec_t left; /* left neighbor extent entry */
+ xfs_filblks_t newlen=0; /* new indirect size */
+ xfs_filblks_t oldlen=0; /* old indirect size */
+ xfs_bmbt_irec_t right; /* right neighbor extent entry */
+ uint32_t state = xfs_bmap_fork_to_state(whichfork);
+ xfs_filblks_t temp; /* temp for indirect calculations */
+
+ ifp = xfs_ifork_ptr(ip, whichfork);
+ ASSERT(isnullstartblock(new->br_startblock));
+
+ /*
+ * Check and set flags if this segment has a left neighbor
+ */
+ if (xfs_iext_peek_prev_extent(ifp, icur, &left)) {
+ state |= BMAP_LEFT_VALID;
+ if (isnullstartblock(left.br_startblock))
+ state |= BMAP_LEFT_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 (xfs_iext_get_extent(ifp, icur, &right)) {
+ state |= BMAP_RIGHT_VALID;
+ if (isnullstartblock(right.br_startblock))
+ state |= BMAP_RIGHT_DELAY;
+ }
+
+ /*
+ * Set contiguity flags on the left and right neighbors.
+ * Don't let extents get too large, even if the pieces are contiguous.
+ */
+ if ((state & BMAP_LEFT_VALID) && (state & BMAP_LEFT_DELAY) &&
+ left.br_startoff + left.br_blockcount == new->br_startoff &&
+ left.br_blockcount + new->br_blockcount <= XFS_MAX_BMBT_EXTLEN)
+ state |= BMAP_LEFT_CONTIG;
+
+ if ((state & BMAP_RIGHT_VALID) && (state & BMAP_RIGHT_DELAY) &&
+ new->br_startoff + new->br_blockcount == right.br_startoff &&
+ new->br_blockcount + right.br_blockcount <= XFS_MAX_BMBT_EXTLEN &&
+ (!(state & BMAP_LEFT_CONTIG) ||
+ (left.br_blockcount + new->br_blockcount +
+ right.br_blockcount <= XFS_MAX_BMBT_EXTLEN)))
+ state |= BMAP_RIGHT_CONTIG;
+
+ /*
+ * Switch out based on the contiguity flags.
+ */
+ switch (state & (BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG)) {
+ case BMAP_LEFT_CONTIG | BMAP_RIGHT_CONTIG:
+ /*
+ * New allocation is contiguous with delayed allocations
+ * on the left and on the right.
+ * Merge all three into a single extent record.
+ */
+ temp = left.br_blockcount + new->br_blockcount +
+ right.br_blockcount;
+
+ oldlen = startblockval(left.br_startblock) +
+ startblockval(new->br_startblock) +
+ startblockval(right.br_startblock);
+ newlen = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
+ oldlen);
+ left.br_startblock = nullstartblock(newlen);
+ left.br_blockcount = temp;
+
+ xfs_iext_remove(ip, icur, state);
+ xfs_iext_prev(ifp, icur);
+ xfs_iext_update_extent(ip, state, icur, &left);
+ break;
+
+ case BMAP_LEFT_CONTIG:
+ /*
+ * New allocation is contiguous with a delayed allocation
+ * on the left.
+ * Merge the new allocation with the left neighbor.
+ */
+ temp = left.br_blockcount + new->br_blockcount;
+
+ oldlen = startblockval(left.br_startblock) +
+ startblockval(new->br_startblock);
+ newlen = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
+ oldlen);
+ left.br_blockcount = temp;
+ left.br_startblock = nullstartblock(newlen);
+
+ xfs_iext_prev(ifp, icur);
+ xfs_iext_update_extent(ip, state, icur, &left);
+ break;
+
+ case BMAP_RIGHT_CONTIG:
+ /*
+ * New allocation is contiguous with a delayed allocation
+ * on the right.
+ * Merge the new allocation with the right neighbor.
+ */
+ temp = new->br_blockcount + right.br_blockcount;
+ oldlen = startblockval(new->br_startblock) +
+ startblockval(right.br_startblock);
+ newlen = XFS_FILBLKS_MIN(xfs_bmap_worst_indlen(ip, temp),
+ oldlen);
+ right.br_startoff = new->br_startoff;
+ right.br_startblock = nullstartblock(newlen);
+ right.br_blockcount = temp;
+ xfs_iext_update_extent(ip, state, icur, &right);
+ break;
+
+ case 0:
+ /*
+ * New allocation is not contiguous with another
+ * delayed allocation.
+ * Insert a new entry.
+ */
+ oldlen = newlen = 0;
+ xfs_iext_insert(ip, icur, new, state);
+ break;
+ }
+ if (oldlen != newlen) {
+ ASSERT(oldlen > newlen);
+ xfs_add_fdblocks(ip->i_mount, oldlen - newlen);
+
+ /*
+ * Nothing to do for disk quota accounting here.
+ */
+ xfs_mod_delalloc(ip, 0, (int64_t)newlen - oldlen);
+ }
+}
+
+/*
+ * Add a delayed allocation extent to an inode. Blocks are reserved from the
+ * global pool and the extent inserted into the inode in-core extent tree.
+ *
+ * On entry, got refers to the first extent beyond the offset of the extent to
+ * allocate or eof is specified if no such extent exists. On return, got refers
+ * to the extent record that was inserted to the inode fork.
+ *
+ * Note that the allocated extent may have been merged with contiguous extents
+ * during insertion into the inode fork. Thus, got does not reflect the current
+ * state of the inode fork on return. If necessary, the caller can use lastx to
+ * look up the updated record in the inode fork.
+ */
+static int
+xfs_bmapi_reserve_delalloc(
+ struct xfs_inode *ip,
+ int whichfork,
+ xfs_fileoff_t off,
+ xfs_filblks_t len,
+ xfs_filblks_t prealloc,
+ struct xfs_bmbt_irec *got,
+ struct xfs_iext_cursor *icur,
+ int eof)
+{
+ struct xfs_mount *mp = ip->i_mount;
+ struct xfs_ifork *ifp = xfs_ifork_ptr(ip, whichfork);
+ xfs_extlen_t alen;
+ xfs_extlen_t indlen;
+ uint64_t fdblocks;
+ int error;
+ xfs_fileoff_t aoff;
+ bool use_cowextszhint =
+ whichfork == XFS_COW_FORK && !prealloc;
+
+retry:
+ /*
+ * Cap the alloc length. Keep track of prealloc so we know whether to
+ * tag the inode before we return.
+ */
+ aoff = off;
+ alen = XFS_FILBLKS_MIN(len + prealloc, XFS_MAX_BMBT_EXTLEN);
+ if (!eof)
+ alen = XFS_FILBLKS_MIN(alen, got->br_startoff - aoff);
+ if (prealloc && alen >= len)
+ prealloc = alen - len;
+
+ /*
+ * If we're targetting the COW fork but aren't creating a speculative
+ * posteof preallocation, try to expand the reservation to align with
+ * the COW extent size hint if there's sufficient free space.
+ *
+ * Unlike the data fork, the CoW cancellation functions will free all
+ * the reservations at inactivation, so we don't require that every
+ * delalloc reservation have a dirty pagecache.
+ */
+ if (use_cowextszhint) {
+ struct xfs_bmbt_irec prev;
+ xfs_extlen_t extsz = xfs_get_cowextsz_hint(ip);
+
+ if (!xfs_iext_peek_prev_extent(ifp, icur, &prev))
+ prev.br_startoff = NULLFILEOFF;
+
+ error = xfs_bmap_extsize_align(mp, got, &prev, extsz, 0, eof,
+ 1, 0, &aoff, &alen);
+ ASSERT(!error);
+ }
+
+ /*
+ * Make a transaction-less quota reservation for delayed allocation
+ * blocks. This number gets adjusted later. We return if we haven't
+ * allocated blocks already inside this loop.
+ */
+ error = xfs_quota_reserve_blkres(ip, alen);
+ if (error)
+ goto out;
+
+ /*
+ * Split changing sb for alen and indlen since they could be coming
+ * from different places.
+ */
+ indlen = (xfs_extlen_t)xfs_bmap_worst_indlen(ip, alen);
+ ASSERT(indlen > 0);
+
+ fdblocks = indlen;
+ if (XFS_IS_REALTIME_INODE(ip)) {
+ error = xfs_dec_frextents(mp, xfs_blen_to_rtbxlen(mp, alen));
+ if (error)
+ goto out_unreserve_quota;
+ } else {
+ fdblocks += alen;
+ }
+
+ error = xfs_dec_fdblocks(mp, fdblocks, false);
+ if (error)
+ goto out_unreserve_frextents;
+
+ ip->i_delayed_blks += alen;
+ xfs_mod_delalloc(ip, alen, indlen);
+
+ got->br_startoff = aoff;
+ got->br_startblock = nullstartblock(indlen);
+ got->br_blockcount = alen;
+ got->br_state = XFS_EXT_NORM;
+
+ xfs_bmap_add_extent_hole_delay(ip, whichfork, icur, got);
+
+ /*
+ * Tag the inode if blocks were preallocated. Note that COW fork
+ * preallocation can occur at the start or end of the extent, even when
+ * prealloc == 0, so we must also check the aligned offset and length.
+ */
+ if (whichfork == XFS_DATA_FORK && prealloc)
+ xfs_inode_set_eofblocks_tag(ip);
+ if (whichfork == XFS_COW_FORK && (prealloc || aoff < off || alen > len))
+ xfs_inode_set_cowblocks_tag(ip);
+
+ return 0;
+
+out_unreserve_frextents:
+ if (XFS_IS_REALTIME_INODE(ip))
+ xfs_add_frextents(mp, xfs_blen_to_rtbxlen(mp, alen));
+out_unreserve_quota:
+ if (XFS_IS_QUOTA_ON(mp))
+ xfs_quota_unreserve_blkres(ip, alen);
+out:
+ if (error == -ENOSPC || error == -EDQUOT) {
+ trace_xfs_delalloc_enospc(ip, off, len);
+
+ if (prealloc || use_cowextszhint) {
+ /* retry without any preallocation */
+ use_cowextszhint = false;
+ prealloc = 0;
+ goto retry;
+ }
+ }
+ return error;
+}
+
static int
xfs_buffered_write_iomap_begin(
struct inode *inode,
--
2.45.2