diff options
| -rw-r--r-- | fs/btrfs/extent_io.c | 31 | ||||
| -rw-r--r-- | fs/btrfs/extent_io.h | 2 |
2 files changed, 33 insertions, 0 deletions
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c index ecb18a8db373..d90330f26827 100644 --- a/fs/btrfs/extent_io.c +++ b/fs/btrfs/extent_io.c @@ -667,6 +667,37 @@ static void end_bbio_data_read(struct btrfs_bio *bbio) } /* + * Populate every free slot in a provided array with folios. + * + * @nr_folios: number of folios to allocate + * @folio_array: the array to fill with folios; any existing non-NULL entries in + * the array will be skipped + * @extra_gfp: the extra GFP flags for the allocation + * + * Return: 0 if all folios were able to be allocated; + * -ENOMEM otherwise, the partially allocated folios would be freed and + * the array slots zeroed + */ +int btrfs_alloc_folio_array(unsigned int nr_folios, struct folio **folio_array, + gfp_t extra_gfp) +{ + for (int i = 0; i < nr_folios; i++) { + if (folio_array[i]) + continue; + folio_array[i] = folio_alloc(GFP_NOFS | extra_gfp, 0); + if (!folio_array[i]) + goto error; + } + return 0; +error: + for (int i = 0; i < nr_folios; i++) { + if (folio_array[i]) + folio_put(folio_array[i]); + } + return -ENOMEM; +} + +/* * Populate every free slot in a provided array with pages. * * @nr_pages: number of pages to allocate diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h index 818431b37124..c81a9b546c9f 100644 --- a/fs/btrfs/extent_io.h +++ b/fs/btrfs/extent_io.h @@ -360,6 +360,8 @@ void btrfs_clear_buffer_dirty(struct btrfs_trans_handle *trans, int btrfs_alloc_page_array(unsigned int nr_pages, struct page **page_array, gfp_t extra_gfp); +int btrfs_alloc_folio_array(unsigned int nr_folios, struct folio **folio_array, + gfp_t extra_gfp); #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS bool find_lock_delalloc_range(struct inode *inode, |