diff options
| author | Pasha Tatashin <pasha.tatashin@soleen.com> | 2026-03-26 16:39:42 +0000 |
|---|---|---|
| committer | Andrew Morton <akpm@linux-foundation.org> | 2026-04-18 00:10:49 -0700 |
| commit | bc3a5763f4664c5da812eb3f14d55b0c99abd4ab (patch) | |
| tree | bb8b21ce8f5ad3b025cbb77b5f2a2ae0fe4265fa | |
| parent | 00d0b372374f2528394aabf7b1f53f8dafe294de (diff) | |
memfd: implement get_id for memfd_luo
Memfds are identified by their underlying inode. Implement get_id for
memfd_luo to return the inode pointer. This prevents the same memfd from
being managed twice by LUO if the same inode is pointed by multiple file
objects.
Link: https://lore.kernel.org/20260326163943.574070-3-pasha.tatashin@soleen.com
Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com>
Reviewed-by: Pratyush Yadav (Google) <pratyush@kernel.org>
Cc: David Matlack <dmatlack@google.com>
Cc: Mike Rapoport (Microsoft) <rppt@kernel.org>
Cc: Samiullah Khawaja <skhawaja@google.com>
Cc: Shuah Khan <shuah@kernel.org>
Cc: Christian Brauner <brauner@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| -rw-r--r-- | mm/memfd_luo.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/mm/memfd_luo.c b/mm/memfd_luo.c index bc7f4f045edf..9130e6ce396d 100644 --- a/mm/memfd_luo.c +++ b/mm/memfd_luo.c @@ -560,6 +560,11 @@ static bool memfd_luo_can_preserve(struct liveupdate_file_handler *handler, return shmem_file(file) && !inode->i_nlink; } +static unsigned long memfd_luo_get_id(struct file *file) +{ + return (unsigned long)file_inode(file); +} + static const struct liveupdate_file_ops memfd_luo_file_ops = { .freeze = memfd_luo_freeze, .finish = memfd_luo_finish, @@ -567,6 +572,7 @@ static const struct liveupdate_file_ops memfd_luo_file_ops = { .preserve = memfd_luo_preserve, .unpreserve = memfd_luo_unpreserve, .can_preserve = memfd_luo_can_preserve, + .get_id = memfd_luo_get_id, .owner = THIS_MODULE, }; |