kernel/git/stable/linux.git/arch/parisc/include, branch linux-5.12.y

net: retrieve netns cookie via getsocketopt

2021-07-19T08:01:08+00:00

[ Upstream commit e8b9eab99232c4e62ada9d7976c80fd5e8118289 ] It's getting more common to run nested container environments for testing cloud software. One of such examples is Kind [1] which runs a Kubernetes cluster in Docker containers on a single host. Each container acts as a Kubernetes node, and thus can run any Pod (aka container) inside the former. This approach simplifies testing a lot, as it eliminates complicated VM setups. Unfortunately, such a setup breaks some functionality when cgroupv2 BPF programs are used for load-balancing. The load-balancer BPF program needs to detect whether a request originates from the host netns or a container netns in order to allow some access, e.g. to a service via a loopback IP address. Typically, the programs detect this by comparing netns cookies with the one of the init ns via a call to bpf_get_netns_cookie(NULL). However, in nested environments the latter cannot be used given the Kubernetes node's netns is outside the init ns. To fix this, we need to pass the Kubernetes node netns cookie to the program in a different way: by extending getsockopt() with a SO_NETNS_COOKIE option, the orchestrator which runs in the Kubernetes node netns can retrieve the cookie and pass it to the program instead. Thus, this is following up on Eric's commit 3d368ab87cf6 ("net: initialize net->net_cookie at netns setup") to allow retrieval via SO_NETNS_COOKIE. This is also in line in how we retrieve socket cookie via SO_COOKIE. [1] https://kind.sigs.k8s.io/ Signed-off-by: Lorenz Bauer Signed-off-by: Martynas Pumputis Cc: Eric Dumazet Reviewed-by: Eric Dumazet Signed-off-by: David S. Miller Signed-off-by: Sasha Levin

parisc: avoid a warning on u8 cast for cmpxchg on u8 pointers

2021-04-06T12:32:12+00:00

commit b344d6a83d01 ("parisc: add support for cmpxchg on u8 pointers") can generate a sparse warning ("cast truncates bits from constant value"), which has been reported several times [1] [2] [3]. The original code worked as expected, but anyway, let silence such sparse warning as what others did [4]. [1] https://lore.kernel.org/r/202104061220.nRMBwCXw-lkp@intel.com [2] https://lore.kernel.org/r/202012291914.T5Agcn99-lkp@intel.com [3] https://lore.kernel.org/r/202008210829.KVwn7Xeh%25lkp@intel.com [4] https://lore.kernel.org/r/20210315131512.133720-2-jacopo+renesas@jmondi.org Cc: Liam Beguin Cc: Helge Deller Cc: stable@vger.kernel.org # v5.8+ Signed-off-by: Gao Xiang Signed-off-by: Helge Deller

parisc: Remove duplicate struct task_struct declaration

2021-04-06T09:46:26+00:00

struct task_struct is declared twice. One has been declared at 154th line. Remove the duplicate. Signed-off-by: Wan Jiabing Signed-off-by: Helge Deller

Merge tag 'x86-entry-2021-02-24' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2021-02-25T00:32:23+00:00

Pull x86 irq entry updates from Thomas Gleixner: "The irq stack switching was moved out of the ASM entry code in course of the entry code consolidation. It ended up being suboptimal in various ways. This reworks the X86 irq stack handling: - Make the stack switching inline so the stackpointer manipulation is not longer at an easy to find place. - Get rid of the unnecessary indirect call. - Avoid the double stack switching in interrupt return and reuse the interrupt stack for softirq handling. - A objtool fix for CONFIG_FRAME_POINTER=y builds where it got confused about the stack pointer manipulation" * tag 'x86-entry-2021-02-24' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: objtool: Fix stack-swizzle for FRAME_POINTER=y um: Enforce the usage of asm-generic/softirq_stack.h x86/softirq/64: Inline do_softirq_own_stack() softirq: Move do_softirq_own_stack() to generic asm header softirq: Move __ARCH_HAS_DO_SOFTIRQ to Kconfig x86: Select CONFIG_HAVE_IRQ_EXIT_ON_IRQ_STACK x86/softirq: Remove indirection in do_softirq_own_stack() x86/entry: Use run_sysvec_on_irqstack_cond() for XEN upcall x86/entry: Convert device interrupts to inline stack switching x86/entry: Convert system vectors to irq stack macro x86/irq: Provide macro for inlining irq stack switching x86/apic: Split out spurious handling code x86/irq/64: Adjust the per CPU irq stack pointer by 8 x86/irq: Sanitize irq stack tracking x86/entry: Fix instrumentation annotation

parisc: Optimize per-pagetable spinlocks

2021-02-12T15:39:42+00:00

On parisc a spinlock is stored in the next page behind the pgd which protects against parallel accesses to the pgd. That's why one additional page (PGD_ALLOC_ORDER) is allocated for the pgd. Matthew Wilcox suggested that we instead should use a pointer in the struct page table for this spinlock and noted, that the comments for the PGD_ORDER and PMD_ORDER defines were wrong. Both suggestions are addressed with this patch. Instead of having an own spinlock to protect the pgd, we now switch to use the existing page_table_lock. Additionally, beside loading the pgd into cr25 in switch_mm_irqs_off(), the physical address of this lock is loaded into cr28 (tr4), so that we can avoid implementing a complicated lookup in assembly for this lock in the TLB fault handlers. The existing Hybrid L2/L3 page table scheme (where the pmd is adjacent to the pgd) has been dropped with this patch. Remove the locking in set_pte() and the huge-page pte functions too. They trigger a spinlock recursion on 32bit machines and seem unnecessary. Suggested-by: Matthew Wilcox Fixes: b37d1c1898b2 ("parisc: Use per-pagetable spinlock") Signed-off-by: John David Anglin Signed-off-by: Helge Deller

parisc: Replace test_ti_thread_flag() with test_tsk_thread_flag()

2021-02-12T15:33:05+00:00

Use test_tsk_thread_flag() directly instead of test_ti_thread_flag() to improve readability when the argument type is struct task_struct, it is similar with commit 5afc78551bf5 ("arm64: Use test_tsk_thread_flag() for checking TIF_SINGLESTEP"). Signed-off-by: Tiezhu Yang Signed-off-by: Helge Deller

parisc: Use the generic devmem_is_allowed()

2021-02-12T15:30:14+00:00

Signed-off-by: Helge Deller

Merge branch 'x86/paravirt' into x86/entry

2021-02-12T12:36:43+00:00

Merge in the recent paravirt changes to resolve conflicts caused by objtool annotations. Conflicts: arch/x86/xen/xen-asm.S Signed-off-by: Ingo Molnar

softirq: Move __ARCH_HAS_DO_SOFTIRQ to Kconfig

2021-02-10T22:34:16+00:00

To prepare for inlining do_softirq_own_stack() replace __ARCH_HAS_DO_SOFTIRQ with a Kconfig switch and select it in the affected architectures. This allows in the next step to move the function prototype and the inline stub into a seperate asm-generic header file which is required to avoid include recursion. Signed-off-by: Thomas Gleixner Reviewed-by: Kees Cook Link: https://lore.kernel.org/r/20210210002513.181713427@linutronix.de

parisc: Remove leftover reference to the power_tasklet

2021-01-26T18:57:26+00:00

This was removed long ago, back in: 6e16d9409e1 ([PARISC] Convert soft power switch driver to kthread) Signed-off-by: Davidlohr Bueso Signed-off-by: Helge Deller