kernel/git/stable/linux.git/fs/erofs, branch master

Merge tag 'erofs-for-7.3-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs

2026-08-25T19:27:41+00:00

Pull more erofs updates from Gao Xiang: - Fix up the EROFS_FS_ZIP_LZMA_DEFAULT_MAX_STREAMS default logic so that "make savedefconfig" won't write the needless default value to the defconfig file - Add support for SEEK_{HOLE,DATA}, splice() as well as enable large folios in inode_share mode - Fix z_erofs_gbuf_growsize() after the previous buffer resizing fails * tag 'erofs-for-7.3-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs: erofs: simplify z_erofs_gbuf_growsize() erofs: skip sufficiently large global buffers when resizing erofs: support large folios in inode_share mode erofs: support splice() in inode_share mode erofs: support SEEK_HOLE/SEEK_DATA in inode_share mode erofs: Fix EROFS_FS_ZIP_LZMA_DEFAULT_MAX_STREAMS default logic

erofs: simplify z_erofs_gbuf_growsize()

2026-08-24T04:21:24+00:00

- Use guard(mutex)() to manage gbuf_resize_mutex; - Nullify tmp_pages after successful allocation, so that the error path becomes clearer. Reviewed-by: Chao Yu Signed-off-by: Gao Xiang

erofs: skip sufficiently large global buffers when resizing

2026-08-24T04:21:09+00:00

z_erofs_gbuf_nrpages is advanced only after every global buffer has been grown. If a resize fails after some buffers were enlarged, a retry revisits those enlarged buffers. Retrying the same size then returns -ENOMEM because alloc_pages_bulk() has no pages to add and the unchanged return value is treated as a failure. Retrying an intermediate size allocates a temporary pointer array smaller than gbuf->nrpages and copies more existing pointers than the array can hold. Skip buffers that already satisfy the request. Once all remaining buffers have caught up, advancing z_erofs_gbuf_nrpages again describes the guaranteed minimum size across the pool. Fixes: d6db47e571dc ("erofs: do not use pagepool in z_erofs_gbuf_growsize()") Cc: stable@vger.kernel.org # 6.10+ Signed-off-by: Nikhil Gurudasani Reviewed-by: Gao Xiang Reviewed-by: Chao Yu Signed-off-by: Gao Xiang

erofs: support large folios in inode_share mode

2026-08-24T04:20:57+00:00

erofs_fill_inode() calls mapping_set_large_folios() on each erofs file's own mapping, but in inode_share mode reads are routed to the shared inode's page cache instead, whose mapping never had large folio support enabled. Set up large folios for the shared inode's mapping as well. Signed-off-by: Jingbo Xu Reviewed-by: Gao Xiang Reviewed-by: Chao Yu Signed-off-by: Gao Xiang

erofs: support splice() in inode_share mode

2026-08-24T04:20:41+00:00

erofs_ishare_fops routes everything that touches the page cache to the backing file in ->private_data: read_iter clones the iocb onto it, mmap does vma_set_file(), fadvise calls vfs_fadvise() on it. splice_read was left as filemap_splice_read(), which works on the user file's own mapping: it does init_sync_kiocb(&iocb, in), and filemap_get_pages() then takes iocb->ki_filp->f_mapping. So splice() and sendfile() fill the per-inode page cache rather than the shared one. The content is the same either way, since erofs_fill_inode() sets a_ops on that mapping too, which is why this went unnoticed. Two identical 8 MiB files under inode_share, reading one of them with splice(2) alone, in pages: before own 2048 shared 0 after own 0 shared 2048 "own" is cachestat(fd), which reports the file's own mapping; "shared" is mmap()+mincore(), which erofs_ishare_mmap() redirects to the backing file. Read through the backing file, as read_iter already does. Link: https://lore.kernel.org/all/b7dc7192-d586-45a2-bc4a-b41dc681c9bb@linux.alibaba.com/ Signed-off-by: Zhan Xusheng Reviewed-by: Jingbo Xu Reviewed-by: Chao Yu Signed-off-by: Gao Xiang

erofs: support SEEK_HOLE/SEEK_DATA in inode_share mode

2026-08-24T04:20:27+00:00

When inode_share is enabled, erofs_ishare_fops.llseek falls back to generic_file_llseek, which treats the whole file as data and always returns i_size for SEEK_HOLE, hiding real holes in sparse files. Switch it to erofs_file_llseek instead. For user files f_mapping->host is always the real erofs inode, so SEEK_HOLE/SEEK_DATA resolve the per-file on-disk layout via iomap_seek_hole()/iomap_seek_data(). Reviewed-by: Gao Xiang Signed-off-by: Jingbo Xu Reviewed-by: Chao Yu Signed-off-by: Gao Xiang

erofs: Fix EROFS_FS_ZIP_LZMA_DEFAULT_MAX_STREAMS default logic

2026-08-24T04:20:11+00:00

When NR_CPUS is less than 16, or when SMP is disabled, the default value of 16 is invalid. While actual configuration picks up a sensible and valid default (NR_CPUS or 1), "make savedefconfig" will still write a line like CONFIG_EROFS_FS_ZIP_LZMA_DEFAULT_MAX_STREAMS=1 to the defconfig file, even if that matches the sensible default. Avoid needlessly enlarging the defconfig files, and reduce churn for updating them, by specifying valid defaults depending on SMP and NR_CPUS. While at it, make the prompt depend on SMP, as there is no point in asking the user about the maximum number of decompression streams if there is only one valid answer. Fixes: c9b47e6b23114e93 ("erofs: cap LZMA stream pool size") Signed-off-by: Geert Uytterhoeven Reviewed-by: Guenter Roeck Reviewed-by: Chao Yu Signed-off-by: Gao Xiang

Merge tag 'for-7.3/block-20260819' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux

2026-08-20T20:55:16+00:00

Pull block updates from Jens Axboe: - NVMe updates via Keith: - Enable Clang context analysis for the nvme host driver, adding context annotations across core, fabrics, rdma, tcp and pci - nvmet reservation state exposed through a new namespace-level debugfs directory, plus ABI documentation for the host sysfs and target configfs interfaces - nvme-tcp host memory disclosure fixes on the read path: reject a read that transferred too few bytes, don't accept C2HData based on blk_rq_payload_bytes() alone, and fix the R2T case for a read command - Parallelize nvme-rdma I/O queue allocation and startup (Surabhi) - Apple nvme fixes and quirks: page aligned admin queue buffers, destroy the admin queue on removal, and various DMA/NVMMU correctness fixes - A large pile of nvmet and host fixes for out-of-bounds reads, refcount/resource leaks, and NULL derefs across auth, zns, passthru, pci-epf, rdma and configfs - Various other fixes and cleanups - MD updates via Yu Kuai: - llbitmap reshape support, the large series wiring exact bitmap mapping and reshape lifecycle through raid5 and raid10, growing the page cache in place, and remapping checkpointed bits as reshape progresses - raid5 fixes for lockless max_nr_stripes and recovery_offset accesses, a reshape deadlock with more failed devices than max degraded, and bitmap batch counter consistency - Atomic write handling for raid1/raid10, and removal of the REQ_NOWAIT support from raid1/10/456 - raid5-ppl use-after-free fix in ppl_do_flush() - A batch of smaller fixes across md core and the bitmap code - s390/dasd ESE full-track write support and the surrounding infrastructure, plus enabling CONTEXT_ANALYSIS for s390/block - RWF_DONTCACHE support for block devices, built on new task-context bio completion infrastructure, and wiring it up for the iomap and buffer dropbehind writeback paths - Async io_uring zone reset all, plus zone management command cleanups allowing REQ_NOWAIT and tightening conventional zone rejection - Block integrity refactoring: lift BIP_CHECK_FLAGS to the shared header, handle nogenerate/noverify properly in fs-integrity, and drop the blk-integrity.h include from bdev.c - Split out a new blk_plug.h header - ublk improvements: add UBLK_F_IO_DESC_SIZE, split request validation from io_desc init, reject non-power-of-2 zone sizes in SET_PARAMS, and a series of hardening fixes around map/unmap and auto buf reg - null_blk cleanups and configfs serialization fixes - nbd queue freeze removal on the setup paths, and a new pre_defined_connections module parameter for pre-created devices - blk-cgroup fixes for the race between policy activation and blkg destruction, and accounting per-cpu stats over possible CPUs across blk-stat, iolatency, iocost and kyber - Various dio fixes: leak on metadata mapping error, validate user space vectors during extraction, and set dma_alignment from the backing file for loop and zloop direct I/O - bio cleanups - Various other fixes and cleanups all over * tag 'for-7.3/block-20260819' of git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux: (241 commits) nbd: add pre_defined_connections module parameter for pre-created devices nbd: remove queue freeze for newly created nbd from netlink path nbd: factor out a nbd_genl_foreach_sock nbd: skip queue freeze when setting size at device startup nbd: remove queue freeze in nbd_add_socket nbd: clear queue limits on disconnect nbd: disallow NBD_SET_SOCK on an active device nbd: simplify find_fallback() by removing redundant logic blk-mq: add missing call to srcu_barrier() in blk_mq_free_tag_set() block: mtip32xx: synchronize ioctls with device removal ublk: avoid teardown retry loop on xarray allocation failure null_blk: fix UBSAN shift-out-of-bounds when zone_size is 0 or overflows block: don't include blk-integrity.h in bdev.c xfs: avoid double deferrals for RWF_DONTCACHE writes loop: Fix recently introduced lock inversion block: set QUEUE_FLAG_DYING unconditionally in blk_mark_disk_dead() swim3: Add missing MODULE_DESCRIPTION selftests: ublk: add SET_PARAMS validation test selftests: ublk: add helper for SET_PARAMS ublk: reject non-power-of-2 zone sizes in SET_PARAMS ...

Merge tag 'erofs-for-7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs

2026-08-20T19:24:48+00:00

Pull erofs updates from Gao Xiang: "The most notable enhancement is to allow passing source fds via fsconfig() for composefs. The others are all various fixes: - Allow source fds via fsconfig(), in addition to source paths - Use dedicated metadata inodes for file-backed mounts - Disallow invalid interlaced ztailpacking pclusters - Validate on-disk compression algorithm IDs against supported ones - Fix unused pcluster pools on higher page-size platforms" * tag 'erofs-for-7.3-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/xiang/erofs: erofs: fix unused pcluster_pools for higher page sizes erofs: guard on-disk algorithm IDs against Z_EROFS_COMPRESSION_MAX erofs: fix interlaced ztailpacking pclusters erofs: use dedicated meta inodes for file-backed mounts erofs: accept source file descriptor via fsconfig erofs: fix typo in error messages

Merge tag 'vfs-7.3-rc1.super' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs

2026-08-17T20:57:04+00:00

Pull vfs superblock updates from Christian Brauner: - Make it possible to share a block device between multiple filesystems. erofs can mount read-only blob devices shared between many superblocks, but because we only tracked a single superblock a freeze, thaw, removal or sync on such a device was never propagated to all the superblocks using it, and there was no way to find them. Add an efficient table to lookup all superblocks using a given block device. - A bunch of pre-existing fixes fell out of this work: A block-device freeze racing a btrfs device change could leave the whole filesystem stuck frozen. A bdev_freeze() issued by "dmsetup suspend" or an LVM snapshot resolves that holder to freeze the filesystem. and bdev_thaw() resolves it again to thaw. A freeze landing while btrfs is adding, removing or replacing a device freezes the filesystem. The membership change then drops that link. So the matching thaw could no longer find the superblock. Forbid freezing a device for the duration of a membership change, modelled on deny_write_access()/allow_write_access(). * tag 'vfs-7.3-rc1.super' of git://git.kernel.org/pub/scm/linux/kernel/git/vfs/vfs: (24 commits) super: fix dying superblock warning messages block: reject block device inodes with i_rdev == 0 in lookup_bdev() selftests/filesystems: add ustat() coverage fs: look up the superblock via the device table in user_get_super() super: make fs_holder_ops private f2fs: open via dedicated fs bdev helpers erofs: open via dedicated fs bdev helpers fs: tolerate per-superblock freeze errors on shared devices fs: look up superblocks via the device table in fs_holder_ops ext4: open via dedicated fs bdev helpers btrfs: open via dedicated fs bdev helpers xfs: port to fs_bdev_file_open_by_path() fs: add dedicated block device open helpers for filesystems fs: maintain a global device-to-superblock table ocfs2: don't reset s_dev on dismount ext4: use anonymous devices for KUnit test superblocks fs, block: move blk_mode_t and fop_flags_t into super: take lock after last reference count super: convert s_count to refcount_t s_passive btrfs: deny freezing devices undergoing a replace ...