diff options
| author | Pratyush Yadav (Google) <pratyush@kernel.org> | 2026-02-16 19:59:32 +0100 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2026-04-05 13:53:00 -0700 |
| commit | 1beb9b7223d2a1f1872f76a3d29b0a4a3cee4171 (patch) | |
| tree | 6e924350b4161a1e96eb0e1959fd21c1dc58e6ab /include/linux | |
| parent | 1df1a1b950863e64c00d48df718ed7ed28db3ea3 (diff) | |
memfd: export memfd_{add,get}_seals()
Patch series "mm: memfd_luo: preserve file seals", v2.
This series adds support for preserving file seals when preserving a memfd
using LUO. Patch 1 exports some memfd seal manipulation functions and
patch 2 adds support for preserving them. Since it makes changes to the
serialized data structure for memfd, it also bumps the version number.
This patch (of 2):
Support for preserving file seals will be added to memfd preservation
using the Live Update Orchestrator (LUO). Export memfd_{add,get}_seals)()
so memfd_luo can use them to manipulate the seals.
Link: https://lkml.kernel.org/r/20260216185946.1215770-1-pratyush@kernel.org
Link: https://lkml.kernel.org/r/20260216185946.1215770-2-pratyush@kernel.org
Signed-off-by: Pratyush Yadav (Google) <pratyush@kernel.org>
Acked-by: Mike Rapoport (Microsoft) <rppt@kernel.org>
Tested-by: Samiullah Khawaja <skhawaja@google.com>
Cc: Alexander Graf <graf@amazon.com>
Cc: Baolin Wang <baolin.wang@linux.alibaba.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Jason Gunthorpe <jgg@nvidia.com>
Cc: Pasha Tatashin <pasha.tatashin@soleen.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/memfd.h | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/memfd.h b/include/linux/memfd.h index c328a7b356d0..b4fda09dab9f 100644 --- a/include/linux/memfd.h +++ b/include/linux/memfd.h @@ -18,6 +18,8 @@ struct folio *memfd_alloc_folio(struct file *memfd, pgoff_t idx); */ int memfd_check_seals_mmap(struct file *file, vm_flags_t *vm_flags_ptr); struct file *memfd_alloc_file(const char *name, unsigned int flags); +int memfd_get_seals(struct file *file); +int memfd_add_seals(struct file *file, unsigned int seals); #else static inline long memfd_fcntl(struct file *f, unsigned int c, unsigned int a) { @@ -37,6 +39,16 @@ static inline struct file *memfd_alloc_file(const char *name, unsigned int flags { return ERR_PTR(-EINVAL); } + +static inline int memfd_get_seals(struct file *file) +{ + return -EINVAL; +} + +static inline int memfd_add_seals(struct file *file, unsigned int seals) +{ + return -EINVAL; +} #endif #endif /* __LINUX_MEMFD_H */ |