kernel.git/fs/erofs/data.c, branch linux-6.15.y

erofs: fix to add missing tracepoint in erofs_readahead()

2025-07-17T16:43:58Z

[ Upstream commit d53238b614e01266a3d36b417b60a502e0698504 ] Commit 771c994ea51f ("erofs: convert all uncompressed cases to iomap") converts to use iomap interface, it removed trace_erofs_readahead() tracepoint in the meantime, let's add it back. Fixes: 771c994ea51f ("erofs: convert all uncompressed cases to iomap") Signed-off-by: Chao Yu Reviewed-by: Gao Xiang Link: https://lore.kernel.org/r/20250707084832.2725677-1-chao@kernel.org Signed-off-by: Gao Xiang Signed-off-by: Sasha Levin

erofs: address D-cache aliasing

2025-07-17T16:43:54Z

commit 27917e8194f91dffd8b4825350c63cb68e98ce58 upstream. Flush the D-cache before unlocking folios for compressed inodes, as they are dirtied during decompression. Avoid calling flush_dcache_folio() on every CPU write, since it's more like playing whack-a-mole without real benefit. It has no impact on x86 and arm64/risc-v: on x86, flush_dcache_folio() is a no-op, and on arm64/risc-v, PG_dcache_clean (PG_arch_1) is clear for new page cache folios. However, certain ARM boards are affected, as reported. Fixes: 3883a79abd02 ("staging: erofs: introduce VLE decompression support") Closes: https://lore.kernel.org/r/c1e51e16-6cc6-49d0-a63e-4e9ff6c4dd53@pengutronix.de Closes: https://lore.kernel.org/r/38d43fae-1182-4155-9c5b-ffc7382d9917@siemens.com Tested-by: Jan Kiszka Tested-by: Stefan Kerkmann Signed-off-by: Gao Xiang Link: https://lore.kernel.org/r/20250709034614.2780117-2-hsiangkao@linux.alibaba.com Signed-off-by: Greg Kroah-Hartman

erofs: fix to add missing tracepoint in erofs_read_folio()

2025-07-17T16:43:54Z

commit 99f7619a77a0a2e3e2bcae676d0f301769167754 upstream. Commit 771c994ea51f ("erofs: convert all uncompressed cases to iomap") converts to use iomap interface, it removed trace_erofs_readpage() tracepoint in the meantime, let's add it back. Fixes: 771c994ea51f ("erofs: convert all uncompressed cases to iomap") Signed-off-by: Chao Yu Reviewed-by: Gao Xiang Link: https://lore.kernel.org/r/20250708111942.3120926-1-chao@kernel.org Signed-off-by: Gao Xiang Signed-off-by: Greg Kroah-Hartman

erofs: implement 48-bit block addressing for unencoded inodes

2025-03-16T17:25:26Z

It adapts the on-disk changes from the previous commit. It also supports EROFS_NULL_ADDR (all 1's) for EROFS_INODE_FLAT_PLAIN inodes to indicate 0-filled inodes, as it's common for composefs use cases. As a result, EROFS_INODE_CHUNK_BASED is no longer needed. Signed-off-by: Gao Xiang Acked-by: Chao Yu Link: https://lore.kernel.org/r/20250310095459.2620647-5-hsiangkao@linux.alibaba.com

erofs: add 48-bit block addressing on-disk support

2025-03-16T17:23:25Z

The current 32-bit block addressing limits EROFS to a 16TiB maximum volume size with 4KiB blocks. However, several new use cases now require larger capacity support: - Massive datasets for model training in order to boost random sampling performance for each epoch; - Object storage clients using EROFS direct passthrough. This extends core on-disk structures to support 48-bit block addressing, such as inodes, device slots, and inode chunks. Additionally: - Expand superblock root NID to 8-byte `rootnid_8b` to enable full out-of-place update incremental builds; - Introduce `epoch` field in the superblock as well as add `mtime` field to 32-byte compact inodes for basic timestamp support. Signed-off-by: Gao Xiang Acked-by: Chao Yu Link: https://lore.kernel.org/r/20250310095459.2620647-4-hsiangkao@linux.alibaba.com

erofs: get rid of erofs_map_blocks_flatmode()

2025-03-16T17:23:25Z

It's simple enough to be folded into erofs_map_blocks(). Signed-off-by: Gao Xiang Acked-by: Chao Yu Link: https://lore.kernel.org/r/20250310095459.2620647-2-hsiangkao@linux.alibaba.com

erofs: get rid of erofs_kmap_type

2025-03-16T17:21:24Z

Since EROFS_KMAP_ATOMIC is no longer valid, get rid of erofs_kmap_type too. Signed-off-by: Bo Liu Reviewed-by: Gao Xiang Reviewed-by: Chao Yu Link: https://lore.kernel.org/r/20250217093141.2659-1-liubo03@inspur.com Signed-off-by: Gao Xiang

erofs: reference `struct erofs_device_info` for erofs_map_dev

2024-12-16T13:02:06Z

Record `m_sb` and `m_dif` to replace `m_fscache`, `m_daxdev`, `m_fp` and `m_dax_part_off` in order to simplify the codebase. Note that `m_bdev` is still left since it can be assigned from `sb->s_bdev` directly. Reviewed-by: Chao Yu Signed-off-by: Gao Xiang Link: https://lore.kernel.org/r/20241212235401.2857246-1-hsiangkao@linux.alibaba.com

erofs: use `struct erofs_device_info` for the primary device

2024-12-16T13:01:59Z

Instead of just listing each one directly in `struct erofs_sb_info` except that we still use `sb->s_bdev` for the primary block device. Reviewed-by: Chao Yu Signed-off-by: Gao Xiang Link: https://lore.kernel.org/r/20241216125310.930933-2-hsiangkao@linux.alibaba.com

erofs: clarify direct I/O support

2024-11-18T10:50:14Z

Currently, only filesystems backed by block devices support direct I/O. Also remove the unnecessary strict checks that can be supported with iomap. Signed-off-by: Gao Xiang Link: https://lore.kernel.org/r/20241115074625.2520728-1-hsiangkao@linux.alibaba.com