diff options
| author | Pavel Begunkov <asml.silence@gmail.com> | 2022-10-16 22:30:48 +0200 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2022-10-17 01:07:12 +0200 |
| commit | 38eddb2c75fb99b9cd78445094ca0e1bda08d102 (patch) | |
| tree | 628f88e6f0449881091b76e5851a186b85864357 /io_uring | |
| parent | Linux 6.1-rc1 (diff) | |
| download | linux-38eddb2c75fb99b9cd78445094ca0e1bda08d102.tar.xz linux-38eddb2c75fb99b9cd78445094ca0e1bda08d102.zip | |
io_uring: remove FFS_SCM
THe lifetime of SCM'ed files is bound to ring_sock, which is destroyed
strictly after we're done with registered file tables. This means there
is no need for the FFS_SCM hack, which was not available on 32-bit builds
anyway.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/984226a1045adf42dc35d8bd7fb5a8bbfa472ce1.1665891182.git.asml.silence@gmail.com
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'io_uring')
| -rw-r--r-- | io_uring/filetable.h | 15 | ||||
| -rw-r--r-- | io_uring/io_uring.c | 2 | ||||
| -rw-r--r-- | io_uring/rsrc.c | 7 | ||||
| -rw-r--r-- | 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) |