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Andrey Albershteyn
be7efb2d20
Introduce file_getattr() and file_setattr() syscalls to manipulate inode extended attributes. The syscalls takes pair of file descriptor and pathname. Then it operates on inode opened accroding to openat() semantics. The struct file_attr is passed to obtain/change extended attributes. This is an alternative to FS_IOC_FSSETXATTR ioctl with a difference that file don't need to be open as we can reference it with a path instead of fd. By having this we can manipulated inode extended attributes not only on regular files but also on special ones. This is not possible with FS_IOC_FSSETXATTR ioctl as with special files we can not call ioctl() directly on the filesystem inode using fd. This patch adds two new syscalls which allows userspace to get/set extended inode attributes on special files by using parent directory and a path - *at() like syscall. CC: [email protected] CC: [email protected] CC: [email protected] Signed-off-by: Andrey Albershteyn <[email protected]> Link: https://lore.kernel.org/[email protected] Acked-by: Arnd Bergmann <[email protected]> Signed-off-by: Christian Brauner <[email protected]>