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erofs: mark experimental fscache backend deprecated

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Although fscache is still described as "General Filesystem Caching" for
network filesystems and other things such as ISO9660 filesystems, it has
actually become a part of netfslib recently, which was unexpected at the
time when "EROFS over fscache" proposed (2021) since EROFS is entirely a
disk filesystem and the dependency is redundant.

Mark it deprecated and it will be removed after "fanotify pre-content
hooks" lands, which will provide the same functionality for EROFS.

Reviewed-by: Sandeep Dhavale <dhavale@google.com>
Reviewed-by: Chao Yu <chao@kernel.org>
Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Link: https://lore.kernel.org/r/20240830032840.3783206-4-hsiangkao@linux.alibaba.com
This commit is contained in:
Gao Xiang 2024-08-30 11:28:40 +08:00
parent 283213718f
commit 0d442ce0b3
2 changed files with 5 additions and 2 deletions
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5
fs/erofs/Kconfig
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@ -145,7 +145,7 @@ config EROFS_FS_ZIP_ZSTD
If unsure, say N. If unsure, say N.
config EROFS_FS_ONDEMAND config EROFS_FS_ONDEMAND
bool "EROFS fscache-based on-demand read support" bool "EROFS fscache-based on-demand read support (deprecated)"
depends on EROFS_FS depends on EROFS_FS
select NETFS_SUPPORT select NETFS_SUPPORT
select FSCACHE select FSCACHE
@ -155,6 +155,9 @@ config EROFS_FS_ONDEMAND
This permits EROFS to use fscache-backed data blobs with on-demand This permits EROFS to use fscache-backed data blobs with on-demand
read support. read support.
It is now deprecated and scheduled to be removed from the kernel
after fanotify pre-content hooks are landed.
If unsure, say N. If unsure, say N.
config EROFS_FS_PCPU_KTHREAD config EROFS_FS_PCPU_KTHREAD

2
fs/erofs/super.c
View File

@ -353,7 +353,7 @@ static int erofs_read_superblock(struct super_block *sb)
ret = erofs_scan_devices(sb, dsb); ret = erofs_scan_devices(sb, dsb);
if (erofs_is_fscache_mode(sb)) if (erofs_is_fscache_mode(sb))
erofs_info(sb, "EXPERIMENTAL fscache-based on-demand read feature in use. Use at your own risk!"); erofs_info(sb, "[deprecated] fscache-based on-demand read feature in use. Use at your own risk!");
out: out:
erofs_put_metabuf(&buf); erofs_put_metabuf(&buf);
return ret; return ret;