Update bcachefs sources to 9404a01d3dc5 bcachefs: Make read_only a mount option again, but hiddenv1.9.2

Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>

1 files changed, 21 insertions, 20 deletions

diff --git a/libbcachefs/fs-io-buffered.c b/libbcachefs/fs-io-buffered.c
index 54873ecc..cc33d763 100644
--- a/libbcachefs/fs-io-buffered.c
+++ b/libbcachefs/fs-io-buffered.c
@@ -678,8 +678,8 @@ int bch2_write_begin(struct file *file, struct address_space *mapping,
 	bch2_pagecache_add_get(inode);
 
 	folio = __filemap_get_folio(mapping, pos >> PAGE_SHIFT,
-				FGP_LOCK|FGP_WRITE|FGP_CREAT|FGP_STABLE,
-				mapping_gfp_mask(mapping));
+				    FGP_WRITEBEGIN | fgf_set_order(len),
+				    mapping_gfp_mask(mapping));
 	if (IS_ERR_OR_NULL(folio))
 		goto err_unlock;
 
@@ -820,9 +820,8 @@ static int __bch2_buffered_write(struct bch_inode_info *inode,
 	darray_init(&fs);
 
 	ret = bch2_filemap_get_contig_folios_d(mapping, pos, end,
-				   FGP_LOCK|FGP_WRITE|FGP_STABLE|FGP_CREAT,
-				   mapping_gfp_mask(mapping),
-				   &fs);
+					       FGP_WRITEBEGIN | fgf_set_order(len),
+					       mapping_gfp_mask(mapping), &fs);
 	if (ret)
 		goto out;
 
@@ -864,24 +863,26 @@ static int __bch2_buffered_write(struct bch_inode_info *inode,
 	f_pos = pos;
 	f_offset = pos - folio_pos(darray_first(fs));
 	darray_for_each(fs, fi) {
+		ssize_t f_reserved;
+
 		f = *fi;
 		f_len = min(end, folio_end_pos(f)) - f_pos;
+		f_reserved = bch2_folio_reservation_get_partial(c, inode, f, &res, f_offset, f_len);
+
+		if (unlikely(f_reserved != f_len)) {
+			if (f_reserved < 0) {
+				if (f == darray_first(fs)) {
+					ret = f_reserved;
+					goto out;
+				}
+
+				folios_trunc(&fs, fi);
+				end = min(end, folio_end_pos(darray_last(fs)));
+			} else {
+				folios_trunc(&fs, fi + 1);
+				end = f_pos + f_reserved;
+			}
 
-		/*
-		 * XXX: per POSIX and fstests generic/275, on -ENOSPC we're
-		 * supposed to write as much as we have disk space for.
-		 *
-		 * On failure here we should still write out a partial page if
-		 * we aren't completely out of disk space - we don't do that
-		 * yet:
-		 */
-		ret = bch2_folio_reservation_get(c, inode, f, &res, f_offset, f_len);
-		if (unlikely(ret)) {
-			folios_trunc(&fs, fi);
-			if (!fs.nr)
-				goto out;
-
-			end = min(end, folio_end_pos(darray_last(fs)));
 			break;
 		}