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Christian Brauner ef696bd15f fs: add file and path permissions helpers 
[ Upstream commit 02f92b3868a1b34ab98464e76b0e4e060474ba10 ]

Add two simple helpers to check permissions on a file and path
respectively and convert over some callers. It simplifies quite a few
codepaths and also reduces the churn in later patches quite a bit.
Christoph also correctly points out that this makes codepaths (e.g.
ioctls) way easier to follow that would otherwise have to do more
complex argument passing than necessary.

Link: https://lore.kernel.org/r/20210121131959.646623-4-christian.brauner@ubuntu.com
Cc: David Howells <dhowells@redhat.com>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Cc: linux-fsdevel@vger.kernel.org
Suggested-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: James Morris <jamorris@linux.microsoft.com>
Signed-off-by: Christian Brauner <christian.brauner@ubuntu.com>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2024-11-19 12:27:33 +01:00
..
damon Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
kasan Revert "kasan: print the original fault addr when access invalid shadow" 2024-11-18 11:06:01 +01:00
kfence Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
sec_mm Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
backing-dev.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
balloon_compaction.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
cleancache.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
cma.c mm/cma: use nth_page() in place of direct struct page manipulation 2024-11-18 11:43:25 +01:00
cma.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
cma_debug.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
cma_sysfs.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
compaction.c mm, vmscan: prevent infinite loop for costly GFP_NOIO | __GFP_RETRY_MAYFAIL allocations 2024-11-19 09:22:46 +01:00
debug.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
debug_page_ref.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
debug_vm_pgtable.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
dmapool.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
early_ioremap.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
fadvise.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
failslab.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
filemap.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
frame_vector.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
frontswap.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
gup.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
gup_benchmark.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
highmem.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
hmm.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
hpa.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
huge_memory.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
hugetlb.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
hugetlb_cgroup.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
hwpoison-inject.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
init-mm.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
internal.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
interval_tree.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
io_record.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
ioremap.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
Kconfig Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
Kconfig.debug Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
khugepaged.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
kmemleak.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
ksm.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
kzerod.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
list_lru.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
maccess.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
madvise.c fs: add file and path permissions helpers 2024-11-19 12:27:33 +01:00
Makefile Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
mapping_dirty_helpers.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
memblock.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
memcontrol.c fs: add file and path permissions helpers 2024-11-19 12:27:33 +01:00
memfd.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
memory-failure.c mm/memory-failure: fix an incorrect use of tail pages 2024-11-19 09:22:41 +01:00
memory.c x86/mm/pat: fix VM_PAT handling in COW mappings 2024-11-19 09:23:15 +01:00
memory_hotplug.c mm/memory_hotplug: use pfn math in place of direct struct page manipulation 2024-11-18 11:43:25 +01:00
mempolicy.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
mempool.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
memremap.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
memtest.c memtest: use {READ,WRITE}_ONCE in memory scanning 2024-11-19 09:22:36 +01:00
migrate.c mm/migrate: set swap entry values of THP tail pages properly. 2024-11-19 09:22:41 +01:00
mincore.c fs: add file and path permissions helpers 2024-11-19 12:27:33 +01:00
mlock.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
mm_init.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
mmap.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
mmu_gather.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
mmu_notifier.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
mmzone.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
mprotect.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
mremap.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
msync.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
nommu.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
oom_kill.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
page-writeback.c mm/writeback: fix possible divide-by-zero in wb_dirty_limits(), again 2024-11-18 12:13:28 +01:00
page_alloc.c mm, vmscan: prevent infinite loop for costly GFP_NOIO | __GFP_RETRY_MAYFAIL allocations 2024-11-19 09:22:46 +01:00
page_counter.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
page_ext.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
page_idle.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
page_io.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
page_isolation.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
page_owner.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
page_pinner.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
page_poison.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
page_reporting.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
page_reporting.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
page_vma_mapped.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
pagewalk.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
percpu-internal.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
percpu-km.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
percpu-stats.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
percpu-vm.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
percpu.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
pgalloc-track.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
pgtable-generic.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
process_vm_access.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
ptdump.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
readahead.c vfs: fix readahead(2) on block devices 2024-11-18 11:42:46 +01:00
rmap.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
rodata_test.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
shmem.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
shuffle.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
shuffle.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
slab.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
slab.h Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
slab_common.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
slob.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
slub.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
sparse-vmemmap.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
sparse.c mm/sparsemem: fix race in accessing memory_section->usage 2024-11-18 12:13:06 +01:00
swap.c mm: swap - set page_cluster at 0 2024-11-17 17:37:44 +01:00
swap_cgroup.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
swap_slots.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
swap_state.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
swapfile.c mm: swap: fix race between free_swap_and_cache() and swapoff() 2024-11-19 09:22:33 +01:00
truncate.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
usercopy.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
userfaultfd.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
util.c mm: vmalloc: introduce array allocation functions 2024-11-18 12:12:59 +01:00
vmacache.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
vmalloc.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
vmpressure.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
vmscan.c mm, vmscan: prevent infinite loop for costly GFP_NOIO | __GFP_RETRY_MAYFAIL allocations 2024-11-19 09:22:46 +01:00
vmstat.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
workingset.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
z3fold.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
zbud.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
zpool.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00
zsmalloc.c zsmalloc: use copy_page for full page copy 2024-11-17 17:41:35 +01:00
zswap.c Import A536BXXU9EXDC 2024-06-15 16:02:09 -03:00