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| author | Jens Axboe <axboe@kernel.dk> | 2021-02-21 16:19:37 -0700 |
|---|---|---|
| committer | Jens Axboe <axboe@kernel.dk> | 2021-02-23 20:33:31 -0700 |
| commit | 62e398be275a6c6efefe117b8960ae4e40e047cd (patch) | |
| tree | c849f88295c2657dbd849caf091639dd60ce1bea | |
| parent | 728f13e730093d0b3a1317d2ada83c2538941f34 (diff) | |
| download | linux-stable-62e398be275a6c6efefe117b8960ae4e40e047cd.tar.gz linux-stable-62e398be275a6c6efefe117b8960ae4e40e047cd.tar.bz2 linux-stable-62e398be275a6c6efefe117b8960ae4e40e047cd.zip | |
io_uring: cleanup ->user usage
At this point we're only using it for memory accounting, so there's no
need to have an extra ->limit_mem - we can just set ->user if we do
the accounting, or leave it at NULL if we don't.
Signed-off-by: Jens Axboe <axboe@kernel.dk>
| -rw-r--r-- | fs/io_uring.c | 18 |
1 files changed, 6 insertions, 12 deletions
diff --git a/fs/io_uring.c b/fs/io_uring.c index 49a636d291cf..e62ad6bde569 100644 --- a/fs/io_uring.c +++ b/fs/io_uring.c @@ -334,7 +334,6 @@ struct io_ring_ctx { struct { unsigned int flags; unsigned int compat: 1; - unsigned int limit_mem: 1; unsigned int cq_overflow_flushed: 1; unsigned int drain_next: 1; unsigned int eventfd_async: 1; @@ -7230,7 +7229,7 @@ static int __io_sqe_files_scm(struct io_ring_ctx *ctx, int nr, int offset) skb->sk = sk; nr_files = 0; - fpl->user = get_uid(ctx->user); + fpl->user = get_uid(current_user()); for (i = 0; i < nr; i++) { struct file *file = io_file_from_index(ctx, i + offset); @@ -7942,7 +7941,7 @@ static inline int __io_account_mem(struct user_struct *user, static void io_unaccount_mem(struct io_ring_ctx *ctx, unsigned long nr_pages) { - if (ctx->limit_mem) + if (ctx->user) __io_unaccount_mem(ctx->user, nr_pages); if (ctx->mm_account) @@ -7953,7 +7952,7 @@ static int io_account_mem(struct io_ring_ctx *ctx, unsigned long nr_pages) { int ret; - if (ctx->limit_mem) { + if (ctx->user) { ret = __io_account_mem(ctx->user, nr_pages); if (ret) return ret; @@ -9370,7 +9369,6 @@ static struct file *io_uring_get_file(struct io_ring_ctx *ctx) static int io_uring_create(unsigned entries, struct io_uring_params *p, struct io_uring_params __user *params) { - struct user_struct *user = NULL; struct io_ring_ctx *ctx; struct file *file; int ret; @@ -9412,16 +9410,12 @@ static int io_uring_create(unsigned entries, struct io_uring_params *p, p->cq_entries = 2 * p->sq_entries; } - user = get_uid(current_user()); - ctx = io_ring_ctx_alloc(p); - if (!ctx) { - free_uid(user); + if (!ctx) return -ENOMEM; - } ctx->compat = in_compat_syscall(); - ctx->limit_mem = !capable(CAP_IPC_LOCK); - ctx->user = user; + if (!capable(CAP_IPC_LOCK)) + ctx->user = get_uid(current_user()); ctx->sqo_task = current; /* |