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io_uring: unify fsize with def->work_flags

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This one was missed in the earlier conversion, should be included like
any of the other IO identity flags. Make sure we restore to RLIM_INIFITY
when dropping the personality again.

Fixes: 98447d65b4 ("io_uring: move io identity items into separate struct")
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Jens Axboe 2020-10-20 14:28:41 -06:00
parent 900fad45dc
commit 69228338c9
3 changed files with 18 additions and 14 deletions
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8
fs/io-wq.c
View File

@ -187,7 +187,8 @@ static bool __io_worker_unuse(struct io_wqe *wqe, struct io_worker *worker)
worker->blkcg_css = NULL;
}
#endif
if (current->signal->rlim[RLIMIT_FSIZE].rlim_cur != RLIM_INFINITY)
current->signal->rlim[RLIMIT_FSIZE].rlim_cur = RLIM_INFINITY;
return dropped_lock;
}
@ -483,7 +484,10 @@ static void io_impersonate_work(struct io_worker *worker,
if ((work->flags & IO_WQ_WORK_CREDS) &&
worker->cur_creds != work->identity->creds)
io_wq_switch_creds(worker, work);
current->signal->rlim[RLIMIT_FSIZE].rlim_cur = work->identity->fsize;
if (work->flags & IO_WQ_WORK_FSIZE)
current->signal->rlim[RLIMIT_FSIZE].rlim_cur = work->identity->fsize;
else if (current->signal->rlim[RLIMIT_FSIZE].rlim_cur != RLIM_INFINITY)
current->signal->rlim[RLIMIT_FSIZE].rlim_cur = RLIM_INFINITY;
io_wq_switch_blkcg(worker, work);
#ifdef CONFIG_AUDIT
current->loginuid = work->identity->loginuid;

1
fs/io-wq.h
View File

@ -17,6 +17,7 @@ enum {
IO_WQ_WORK_MM = 128,
IO_WQ_WORK_CREDS = 256,
IO_WQ_WORK_BLKCG = 512,
IO_WQ_WORK_FSIZE = 1024,
IO_WQ_HASH_SHIFT = 24, /* upper 8 bits are used for hash key */
};

23
fs/io_uring.c
View File

@ -753,8 +753,6 @@ struct io_op_def {
unsigned pollout : 1;
/* op supports buffer selection */
unsigned buffer_select : 1;
/* needs rlimit(RLIMIT_FSIZE) assigned */
unsigned needs_fsize : 1;
/* must always have async data allocated */
unsigned needs_async_data : 1;
/* size of async data needed, if any */
@ -778,10 +776,10 @@ static const struct io_op_def io_op_defs[] = {
.hash_reg_file = 1,
.unbound_nonreg_file = 1,
.pollout = 1,
.needs_fsize = 1,
.needs_async_data = 1,
.async_size = sizeof(struct io_async_rw),
.work_flags = IO_WQ_WORK_MM | IO_WQ_WORK_BLKCG,
.work_flags = IO_WQ_WORK_MM | IO_WQ_WORK_BLKCG |
IO_WQ_WORK_FSIZE,
},
[IORING_OP_FSYNC] = {
.needs_file = 1,
@ -799,9 +797,8 @@ static const struct io_op_def io_op_defs[] = {
.hash_reg_file = 1,
.unbound_nonreg_file = 1,
.pollout = 1,
.needs_fsize = 1,
.async_size = sizeof(struct io_async_rw),
.work_flags = IO_WQ_WORK_BLKCG,
.work_flags = IO_WQ_WORK_BLKCG | IO_WQ_WORK_FSIZE,
},
[IORING_OP_POLL_ADD] = {
.needs_file = 1,
@ -859,8 +856,7 @@ static const struct io_op_def io_op_defs[] = {
},
[IORING_OP_FALLOCATE] = {
.needs_file = 1,
.needs_fsize = 1,
.work_flags = IO_WQ_WORK_BLKCG,
.work_flags = IO_WQ_WORK_BLKCG | IO_WQ_WORK_FSIZE,
},
[IORING_OP_OPENAT] = {
.work_flags = IO_WQ_WORK_FILES | IO_WQ_WORK_BLKCG |
@ -890,9 +886,9 @@ static const struct io_op_def io_op_defs[] = {
.needs_file = 1,
.unbound_nonreg_file = 1,
.pollout = 1,
.needs_fsize = 1,
.async_size = sizeof(struct io_async_rw),
.work_flags = IO_WQ_WORK_MM | IO_WQ_WORK_BLKCG,
.work_flags = IO_WQ_WORK_MM | IO_WQ_WORK_BLKCG |
IO_WQ_WORK_FSIZE,
},
[IORING_OP_FADVISE] = {
.needs_file = 1,
@ -1293,8 +1289,11 @@ static bool io_grab_identity(struct io_kiocb *req)
struct io_identity *id = req->work.identity;
struct io_ring_ctx *ctx = req->ctx;
if (def->needs_fsize && id->fsize != rlimit(RLIMIT_FSIZE))
return false;
if (def->work_flags & IO_WQ_WORK_FSIZE) {
if (id->fsize != rlimit(RLIMIT_FSIZE))
return false;
req->work.flags |= IO_WQ_WORK_FSIZE;
}
if (!(req->work.flags & IO_WQ_WORK_FILES) &&
(def->work_flags & IO_WQ_WORK_FILES) &&