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David Howells <dhowells@redhat.com> says: Here are some miscellaneous fixes for netfslib. I separated them from my netfs-next branch. Various Sashiko review comments[1][2][3] are addressed: (1) Fix the decision whether to disallow write-streaming due to fscache use. (2) Fix netfs_create_write_req() to better handle async cache object creation. (3) Fix a double fput in cachefiles_create_tmpfile(). (4) Fix alteration of S_KERNEL_FILE inode flag without holding inode lock. (5) Fix a potential mathematical underflow in iov_iter_extract_xarray_pages() and make it return 0 and free the array if no pages could be extracted. (6) Fix a missing alloc failure check in iov_iter_extract_bvec_pages(). (7) Fix iov_iter_extract_user_pages() so that it doesn't leak the pages array if it returns an error or 0 (inasmuch as the leak is really in the callers). (8) Remove an unused variable in kunit_iov_iter.c. (9) Fix extract_xarray_to_sg() to calculate folio offset correctly. (10) Fix a kdoc comment. (11) Replace the netfs_inode::wb_lock mutex with a bit lock so that the lock can be passed to the collector so that multiple asynchronous writebacks won't interfere with each other. (12) Fix writeback error handling to go through writeback_iter() so that it can clean up its state. (13) Fix ENOMEM handling in writeback to clean up the current folio if we can't allocate a rolling buffer segment. (14) Fix unbuffered/DIO write retry for filesystems that don't have a ->prepare_write() method. [1] https://sashiko.dev/#/patchset/20260608145432.681865-1-dhowells%40redhat.com [2] https://sashiko.dev/#/patchset/20260616100821.2062304-1-dhowells%40redhat.com [3] https://sashiko.dev/#/patchset/20260619140646.2633762-1-dhowells%40redhat.com [4] https://sashiko.dev/#/patchset/20260624115737.2964520-1-dhowells%40redhat.com * patches from https://patch.msgid.link/20260625140640.3116900-1-dhowells@redhat.com: netfs: Fix DIO write retry for filesystems without a ->prepare_write() netfs: Fix folio state after ENOMEM whilst under writeback iteration netfs: Fix writeback error handling netfs: Fix writethrough to use collection offload netfs: Replace wb_lock with a bit lock for asynchronicity netfs: Fix kdoc warning scatterlist: Fix offset in folio calc in extract_xarray_to_sg() iov_iter: Remove unused variable in kunit_iov_iter.c iov_iter: Fix a memory leak in iov_iter_extract_user_pages() iov_iter: Fix missing alloc fail check in iov_iter_extract_bvec_pages() iov_iter: Fix potential underflow in iov_iter_extract_xarray_pages() cachefiles: Fix file burial to take lock when unsetting S_KERNEL_FILE cachefiles: Fix double fput netfs: Fix netfs_create_write_req() to handle async cache object creation netfs: Fix decision whether to disallow write-streaming due to fscache use Link: https://patch.msgid.link/20260625140640.3116900-1-dhowells@redhat.com Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
Linux kernel ============ The Linux kernel is the core of any Linux operating system. It manages hardware, system resources, and provides the fundamental services for all other software. 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