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fs/Kconfig: add CONFIG_FS_PERMISSION option

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Add a CONFIG_FS_PERMISSION Kconfig option for future
filesystem permission support infrastructure.

The option depends on CONFIG_SCHED_USER_IDENTITY and
CONFIG_PSEUDOFS_ATTRIBUTES to ensure task credential
tracking and pseudo-filesystem inode ownership/mode
metadata are available before enabling the feature.

The symbol defaults to n to preserve existing behavior
for current configurations.

No runtime permission enforcement is introduced by
this commit.

Signed-off-by: Abhishek Mishra <mishra.abhishek2808@gmail.com>
This commit is contained in:
Abhishek Mishra
2026-05-12 17:57:02 +00:00
committed by Alan C. Assis
parent 76b31b04a3
commit 24b245a2f9
1 changed files with 21 additions and 0 deletions
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fs/Kconfig
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@@ -94,6 +94,27 @@ config PSEUDOFS_ATTRIBUTES
Enable support for attributes(e.g. mode, uid, gid and time)
in the pseudo file system.
config FS_PERMISSION
bool "Enable UNIX Filesystem Permission Support"
default n
depends on !DISABLE_PSEUDOFS_OPERATIONS
depends on SCHED_USER_IDENTITY
depends on PSEUDOFS_ATTRIBUTES
---help---
Enable filesystem ownership and permission metadata
support for pseudoFS inodes.
Requires SCHED_USER_IDENTITY and
PSEUDOFS_ATTRIBUTES for task credential tracking
and inode ownership/mode metadata support.
This option alone does not enforce runtime
permission checks.
comment "UNIX filesystem permission support requires SCHED_USER_IDENTITY=y, PSEUDOFS_ATTRIBUTES=y and DISABLE_PSEUDOFS_OPERATIONS=n"
depends on !SCHED_USER_IDENTITY || !PSEUDOFS_ATTRIBUTES || DISABLE_PSEUDOFS_OPERATIONS
config PSEUDOFS_SOFTLINKS
bool "Pseudo-filesystem soft links"
default n