scm'ed files lifetime is bound to ring_sock, which is destroyed strictly
after we're done with registered file tables, so no need for the FFS_SCM
hack.
Signed-off-by: Pavel Begunkov <asml.silence@xxxxxxxxx>
---
io_uring/filetable.h | 15 +--------------
io_uring/io_uring.c | 2 --
io_uring/rsrc.c | 7 ++-----
io_uring/rsrc.h | 4 ----
4 files changed, 3 insertions(+), 25 deletions(-)
diff --git a/io_uring/filetable.h b/io_uring/filetable.h
index ff3a712e11bf..19d2aed66c72 100644
--- a/io_uring/filetable.h
+++ b/io_uring/filetable.h
@@ -5,22 +5,9 @@
#include <linux/file.h>
#include <linux/io_uring_types.h>
-/*
- * FFS_SCM is only available on 64-bit archs, for 32-bit we just define it as 0
- * and define IO_URING_SCM_ALL. For this case, we use SCM for all files as we
- * can't safely always dereference the file when the task has exited and ring
- * cleanup is done. If a file is tracked and part of SCM, then unix gc on
- * process exit may reap it before __io_sqe_files_unregister() is run.
- */
#define FFS_NOWAIT 0x1UL
#define FFS_ISREG 0x2UL
-#if defined(CONFIG_64BIT)
-#define FFS_SCM 0x4UL
-#else
-#define IO_URING_SCM_ALL
-#define FFS_SCM 0x0UL
-#endif
-#define FFS_MASK ~(FFS_NOWAIT|FFS_ISREG|FFS_SCM)
+#define FFS_MASK ~(FFS_NOWAIT|FFS_ISREG)
bool io_alloc_file_tables(struct io_file_table *table, unsigned nr_files);
void io_free_file_tables(struct io_file_table *table);
diff --git a/io_uring/io_uring.c b/io_uring/io_uring.c
index de08d9902b30..18aa39709fae 100644
--- a/io_uring/io_uring.c
+++ b/io_uring/io_uring.c
@@ -1587,8 +1587,6 @@ unsigned int io_file_get_flags(struct file *file)
res |= FFS_ISREG;
if (__io_file_supports_nowait(file, mode))
res |= FFS_NOWAIT;
- if (io_file_need_scm(file))
- res |= FFS_SCM;
return res;
}
diff --git a/io_uring/rsrc.c b/io_uring/rsrc.c
index 012fdb04ec23..55d4ab96fb92 100644
--- a/io_uring/rsrc.c
+++ b/io_uring/rsrc.c
@@ -757,20 +757,17 @@ int io_queue_rsrc_removal(struct io_rsrc_data *data, unsigned idx,
void __io_sqe_files_unregister(struct io_ring_ctx *ctx)
{
-#if !defined(IO_URING_SCM_ALL)
int i;
for (i = 0; i < ctx->nr_user_files; i++) {
struct file *file = io_file_from_index(&ctx->file_table, i);
- if (!file)
- continue;
- if (io_fixed_file_slot(&ctx->file_table, i)->file_ptr & FFS_SCM)
+ /* skip scm accounted files, they'll be freed by ->ring_sock */
+ if (!file || io_file_need_scm(file))
continue;
io_file_bitmap_clear(&ctx->file_table, i);
fput(file);
}
-#endif
#if defined(CONFIG_UNIX)
if (ctx->ring_sock) {
diff --git a/io_uring/rsrc.h b/io_uring/rsrc.h
index 9bce15665444..81445a477622 100644
--- a/io_uring/rsrc.h
+++ b/io_uring/rsrc.h
@@ -82,11 +82,7 @@ int __io_scm_file_account(struct io_ring_ctx *ctx, struct file *file);
#if defined(CONFIG_UNIX)
static inline bool io_file_need_scm(struct file *filp)
{
-#if defined(IO_URING_SCM_ALL)
- return true;
-#else
return !!unix_get_socket(filp);
-#endif
}
#else
static inline bool io_file_need_scm(struct file *filp)
--
2.38.0
