ksmbd: support access-based directory enumeration

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SMB shares can advertise access-based directory enumeration. ksmbd does
not currently provide a share option or filter inaccessible directory
entries.

Add a hide-unreadable share flag and advertise
SMB2_SHAREFLAG_ACCESS_BASED_DIRECTORY_ENUM when it is enabled. During
QUERY_DIRECTORY, omit entries unless the connected user has
FILE_READ_DATA, FILE_READ_EA, and FILE_READ_ATTRIBUTES access according
to the Windows ACL.

Keep the existing implicit access allowances for normal CREATE
permission checks while using strict access-mask matching for directory
enumeration.

Signed-off-by: Namjae Jeon <linkinjeon@kernel.org>

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This commit is contained in:

Namjae Jeon 2026-07-05 15:20:06 +09:00

parent cc2f133e80

commit e5f42cb757

4 changed files with 36 additions and 5 deletions

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1

fs/smb/server/ksmbd_netlink.h

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24

fs/smb/server/smb2pdu.c

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13

fs/smb/server/smbacl.c

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3

fs/smb/server/smbacl.h

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