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EROFS over fscache was introduced to provide image lazy pulling functionality. After the feature landed, the fscache subsystem made netfs a new hard dependency, which is unexpected for a local filesystem and has an kernel-defined caching hierarchy which could be inflexible compared to the fanotify pre-content hooks. Therefore, this feature has been deprecated for almost two years. As EROFS file-backed mounts and fanotify pre-content hooks both upstream for a while and already providing equivalent functionality (erofs-utils has supported fanotify pre-content hooks), let's remove the fscache backend now. The main application of this feature is Nydus [1], and they plan to move to use fanotify pre-content hooks in the near future too. I hope this patch can be merged into Linux 7.2, which is also motivated by newly found implementation issues [2][3] that are not worth investigating given the deprecation and limited development resources. The associated fscache/cachefiles cleanup patch will follow separately through the vfs tree (netfs) later: it seems fine since the codebase is isolated by CONFIG_CACHEFILES_ONDEMAND. [1] https://github.com/dragonflyoss/nydus/blob/v2.1.0/docs/nydus-fscache.md [2] https://github.com/dragonflyoss/nydus/pull/1824 [3] https://lore.kernel.org/r/20260619135800.1594811-1-michael.bommarito@gmail.com Acked-by: Jingbo Xu <jefflexu@linux.alibaba.com> Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
13 lines
589 B
Makefile
13 lines
589 B
Makefile
# SPDX-License-Identifier: GPL-2.0-only
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obj-$(CONFIG_EROFS_FS) += erofs.o
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erofs-objs := super.o inode.o data.o namei.o dir.o sysfs.o
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erofs-$(CONFIG_EROFS_FS_XATTR) += xattr.o
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erofs-$(CONFIG_EROFS_FS_ZIP) += decompressor.o zmap.o zdata.o zutil.o
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erofs-$(CONFIG_EROFS_FS_ZIP_LZMA) += decompressor_lzma.o
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erofs-$(CONFIG_EROFS_FS_ZIP_DEFLATE) += decompressor_deflate.o
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erofs-$(CONFIG_EROFS_FS_ZIP_ZSTD) += decompressor_zstd.o
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erofs-$(CONFIG_EROFS_FS_ZIP_ACCEL) += decompressor_crypto.o
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erofs-$(CONFIG_EROFS_FS_BACKED_BY_FILE) += fileio.o
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erofs-$(CONFIG_EROFS_FS_PAGE_CACHE_SHARE) += ishare.o
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