Name

generic_permission — check for access rights on a Posix-like filesystem

Synopsis

int generic_permission (struct inode *  inode,
 int  mask,
 int (* check_acl(struct inode *inode, int mask));

Arguments

inode

inode to check access rights for

mask

right to check for (MAY_READ, MAY_WRITE, MAY_EXEC)

check_acl

optional callback to check for Posix ACLs

Description

Used to check for read/write/execute permissions on a file. We use “fsuid” for this, letting us set arbitrary permissions for filesystem access without changing the “normal” uids which are used for other things..