kernel/linux.git/fs/fuse/file.c, branch v7.2-rc2

fuse: call fuse_send_readpages explicitly from fuse_readahead

2026-07-01T13:26:47+00:00

Move the call to fuse_send_readpages from the iomap ->submit_read method to the fuse readahead implementation. fuse_read_folio() does not need to call fuse_send_readpages() because it always does reads synchronously (the iomap->submit_read method for this was a no-op since data->ia is always NULL for fuse_read_folio()). This prepares for an iomap fix that will call ->submit_read after each iomap. Signed-off-by: Joanne Koong Signed-off-by: Christoph Hellwig Link: https://patch.msgid.link/20260629121750.3392300-3-hch@lst.de Reviewed-by: "Darrick J. Wong" Signed-off-by: Christian Brauner (Amutable)

Merge tag 'fuse-update-7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse

2026-06-18T15:50:52+00:00

Pull fuse updates from Miklos Szeredi: - Fix lots of bugs, most from the late 6.x era, but some going back to 2.6.x - Add subsystems (io-uring, passthrough) and respective maintainers (Bernd, Joanne and Amir) - Separate transport and fs layers (Miklos) - Don't block on cat /dev/fuse (Joanne) - Perform some refactoring in fuse-uring (Joanne) - Don't use bounce-buffer for READDIR reply in virtio-fs (Matthew Ochs) - Clean up documentation (Randy) - Improve tracing (Amir) - Extend page cache invalidation after DIO (Cheng Ding) - Invalidate readdir cache on epoch change (Jun Wu) - Misc cleanups * tag 'fuse-update-7.2' of git://git.kernel.org/pub/scm/linux/kernel/git/mszeredi/fuse: (81 commits) fuse-uring: clear ent->fuse_req in commit_fetch error path fuse-uring: use named constants for io-uring iovec indices fuse-uring: refactor setting up copy state for payload copying fuse-uring: use enum types for header copying fuse-uring: refactor io-uring header copying from ring fuse-uring: refactor io-uring header copying to ring fuse-uring: separate next request fetching from sending logic fuse: invalidate readdir cache on epoch bump virtio-fs: avoid double-free on failed queue setup fuse: invalidate page cache after DIO and async DIO writes fuse: set ff->flock only on success fuse: clean up interrupt reading fuse: remove stray newline in fuse_dev_do_read() fuse: use READ_ONCE in fuse_chan_num_background() fuse: dax: Move long delayed work on system_dfl_long_wq fuse: add fuse_request_sent tracepoint fuse: Add SPDX ID lines to some files fuse: use QSTR() instead of QSTR_INIT() in fuse_get_dentry fuse: convert page array allocation to kcalloc() fuse: use current creds for backing files ...

fuse: invalidate page cache after DIO and async DIO writes

2026-06-15T12:06:20+00:00

This fixe does page cache invalidation after DIO and async DIO writes for both O_DIRECT and FOPEN_DIRECT_IO cases. Commit b359af8275a9 ("fuse: Invalidate the page cache after FOPEN_DIRECT_IO write") fixed xfstests generic/209 for DIO writes in the FOPEN_DIRECT_IO path. DIO writes without FOPEN_DIRECT_IO are already handled by generic_file_direct_write(). However, async DIO writes (xfstests generic/451) remain unhandled. After this fix: - Async write with FUSE_ASYNC_DIO: invalidate in fuse_aio_invalidate_worker() - Otherwise (Sync or async write without FUSE_ASYNC_DIO): - With FOPEN_DIRECT_IO: invalidate in fuse_direct_write_iter() - Without FOPEN_DIRECT_IO: invalidate in generic_file_direct_write() Workqueue is required for async write invalidation to prevent deadlock: calling it directly in the I/O end routine (which is in fuse worker thread context) can block on a folio lock held by a buffered I/O thread waiting for the same fuse worker thread. Co-developed-by: Jingbo Xu Signed-off-by: Jingbo Xu Signed-off-by: Cheng Ding Reviewed-by: Jingbo Xu Signed-off-by: Miklos Szeredi

fuse: set ff->flock only on success

2026-06-15T12:06:20+00:00

If FUSE_SETLK fails (e.g., due to EWOULDBLOCK), we shall not set FUSE_RELEASE_FLOCK_UNLOCK in fuse_file_release(). Reported-by: Li Yichao Signed-off-by: Zhang Tianci Signed-off-by: Miklos Szeredi

fuse: Add SPDX ID lines to some files

2026-06-15T12:06:19+00:00

Some fuse source files are missing SPDX-License-Identifier lines. Add appropriate IDs to these files, and remove old license references from the headers. Signed-off-by: Tim Bird Signed-off-by: Miklos Szeredi

fuse: convert page array allocation to kcalloc()

2026-06-15T12:06:19+00:00

fuse_get_user_pages() allocates the temporary pages[] array used by iov_iter_extract_pages() with the open-coded kzalloc(n * sizeof(*p), ...) form. max_pages is derived from the inbound iov_iter and is not bounded at compile time, so the multiplication can overflow on sufficiently large iter counts; the resulting too-small allocation would then be written past by iov_iter_extract_pages(). Switch to kcalloc(), which carries the same zero-on-allocation semantics and adds the standard size_mul overflow check. No functional change for non-overflow inputs. Signed-off-by: William Theesfeld Signed-off-by: Miklos Szeredi

fuse: create poll.c

2026-06-15T12:06:17+00:00

Move f_op->poll related functions to the new source file. Signed-off-by: Miklos Szeredi

fuse: remove fm arg of args->end callback

2026-06-15T12:06:17+00:00

Only used by FUSE_INIT and CUSE_INIT, these can store the relevant pointer in their structs derived from fuse_args. Signed-off-by: Miklos Szeredi

fuse: don't access transport layer structs directly from the fs layer

2026-06-15T12:06:16+00:00

Add helpers (get and set functions mainly) that cleanly separate the layers. Remove #include "fuse_dev_i.h" from: - inode.c - file.c - control.c Remove #include "dev_uring_i.h" from inode.c. [Li Wang: drop redundant initializer in process_init_limits()] Signed-off-by: Miklos Szeredi

fuse: move background queuing related members to fuse_chan

2026-06-15T12:06:15+00:00

Move: - max_background - num_background - active_background - bg_queue - bg_lock Signed-off-by: Miklos Szeredi