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Merge tag 'block-6.17-20250828' of git://git.kernel.dk/linux

Browse Source 
Pull block fixes from Jens Axboe:

 - Fix a lockdep spotted issue on recursive locking for zoned writes, in
   case of errors

 - Update bcache MAINTAINERS entry address for Coly

 - Fix for a ublk release issue, with selftests

 - Fix for a regression introduced in this cycle, where it assumed
   q->rq_qos was always set if the bio flag indicated that

 - Fix for a regression introduced in this cycle, where loop retrieving
   block device sizes got broken

* tag 'block-6.17-20250828' of git://git.kernel.dk/linux:
  bcache: change maintainer's email address
  ublk selftests: add --no_ublk_fixed_fd for not using registered ublk char device
  ublk: avoid ublk_io_release() called after ublk char dev is closed
  block: validate QoS before calling __rq_qos_done_bio()
  blk-zoned: Fix a lockdep complaint about recursive locking
  loop: fix zero sized loop for block special file
This commit is contained in:
Linus Torvalds
2025-08-28 18:51:28 -07:00
parent 220374ab2b 95a7c50009
commit d1cf752d58
11 changed files with 175 additions and 56 deletions
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10
tools/testing/selftests/ublk/file_backed.c
View File

@@ -20,7 +20,7 @@ static int loop_queue_flush_io(struct ublk_thread *t, struct ublk_queue *q,
struct io_uring_sqe *sqe[1];
ublk_io_alloc_sqes(t, sqe, 1);
io_uring_prep_fsync(sqe[0], 1 /*fds[1]*/, IORING_FSYNC_DATASYNC);
io_uring_prep_fsync(sqe[0], ublk_get_registered_fd(q, 1) /*fds[1]*/, IORING_FSYNC_DATASYNC);
io_uring_sqe_set_flags(sqe[0], IOSQE_FIXED_FILE);
/* bit63 marks us as tgt io */
sqe[0]->user_data = build_user_data(tag, ublk_op, 0, q->q_id, 1);
@@ -42,7 +42,7 @@ static int loop_queue_tgt_rw_io(struct ublk_thread *t, struct ublk_queue *q,
if (!sqe[0])
return -ENOMEM;
io_uring_prep_rw(op, sqe[0], 1 /*fds[1]*/,
io_uring_prep_rw(op, sqe[0], ublk_get_registered_fd(q, 1) /*fds[1]*/,
addr,
iod->nr_sectors << 9,
iod->start_sector << 9);
@@ -56,19 +56,19 @@ static int loop_queue_tgt_rw_io(struct ublk_thread *t, struct ublk_queue *q,
ublk_io_alloc_sqes(t, sqe, 3);
io_uring_prep_buf_register(sqe[0], 0, tag, q->q_id, ublk_get_io(q, tag)->buf_index);
io_uring_prep_buf_register(sqe[0], q, tag, q->q_id, ublk_get_io(q, tag)->buf_index);
sqe[0]->flags |= IOSQE_CQE_SKIP_SUCCESS | IOSQE_IO_HARDLINK;
sqe[0]->user_data = build_user_data(tag,
ublk_cmd_op_nr(sqe[0]->cmd_op), 0, q->q_id, 1);
io_uring_prep_rw(op, sqe[1], 1 /*fds[1]*/, 0,
io_uring_prep_rw(op, sqe[1], ublk_get_registered_fd(q, 1) /*fds[1]*/, 0,
iod->nr_sectors << 9,
iod->start_sector << 9);
sqe[1]->buf_index = tag;
sqe[1]->flags |= IOSQE_FIXED_FILE | IOSQE_IO_HARDLINK;
sqe[1]->user_data = build_user_data(tag, ublk_op, 0, q->q_id, 1);
io_uring_prep_buf_unregister(sqe[2], 0, tag, q->q_id, ublk_get_io(q, tag)->buf_index);
io_uring_prep_buf_unregister(sqe[2], q, tag, q->q_id, ublk_get_io(q, tag)->buf_index);
sqe[2]->user_data = build_user_data(tag, ublk_cmd_op_nr(sqe[2]->cmd_op), 0, q->q_id, 1);
return 2;

38
tools/testing/selftests/ublk/kublk.c
View File

@@ -432,7 +432,7 @@ static void ublk_thread_deinit(struct ublk_thread *t)
}
}
static int ublk_queue_init(struct ublk_queue *q, unsigned extra_flags)
static int ublk_queue_init(struct ublk_queue *q, unsigned long long extra_flags)
{
struct ublk_dev *dev = q->dev;
int depth = dev->dev_info.queue_depth;
@@ -446,6 +446,9 @@ static int ublk_queue_init(struct ublk_queue *q, unsigned extra_flags)
q->flags = dev->dev_info.flags;
q->flags |= extra_flags;
/* Cache fd in queue for fast path access */
q->ublk_fd = dev->fds[0];
cmd_buf_size = ublk_queue_cmd_buf_sz(q);
off = UBLKSRV_CMD_BUF_OFFSET + q->q_id * ublk_queue_max_cmd_buf_sz();
q->io_cmd_buf = mmap(0, cmd_buf_size, PROT_READ,
@@ -481,9 +484,10 @@ static int ublk_queue_init(struct ublk_queue *q, unsigned extra_flags)
return -ENOMEM;
}
static int ublk_thread_init(struct ublk_thread *t)
static int ublk_thread_init(struct ublk_thread *t, unsigned long long extra_flags)
{
struct ublk_dev *dev = t->dev;
unsigned long long flags = dev->dev_info.flags | extra_flags;
int ring_depth = dev->tgt.sq_depth, cq_depth = dev->tgt.cq_depth;
int ret;
@@ -512,7 +516,17 @@ static int ublk_thread_init(struct ublk_thread *t)
io_uring_register_ring_fd(&t->ring);
ret = io_uring_register_files(&t->ring, dev->fds, dev->nr_fds);
if (flags & UBLKS_Q_NO_UBLK_FIXED_FD) {
/* Register only backing files starting from index 1, exclude ublk control device */
if (dev->nr_fds > 1) {
ret = io_uring_register_files(&t->ring, &dev->fds[1], dev->nr_fds - 1);
} else {
/* No backing files to register, skip file registration */
ret = 0;
}
} else {
ret = io_uring_register_files(&t->ring, dev->fds, dev->nr_fds);
}
if (ret) {
ublk_err("ublk dev %d thread %d register files failed %d\n",
t->dev->dev_info.dev_id, t->idx, ret);
@@ -626,9 +640,12 @@ int ublk_queue_io_cmd(struct ublk_thread *t, struct ublk_io *io)
/* These fields should be written once, never change */
ublk_set_sqe_cmd_op(sqe[0], cmd_op);
sqe[0]->fd = 0; /* dev->fds[0] */
sqe[0]->fd = ublk_get_registered_fd(q, 0); /* dev->fds[0] */
sqe[0]->opcode = IORING_OP_URING_CMD;
sqe[0]->flags = IOSQE_FIXED_FILE;
if (q->flags & UBLKS_Q_NO_UBLK_FIXED_FD)
sqe[0]->flags = 0; /* Use raw FD, not fixed file */
else
sqe[0]->flags = IOSQE_FIXED_FILE;
sqe[0]->rw_flags = 0;
cmd->tag = io->tag;
cmd->q_id = q->q_id;
@@ -832,6 +849,7 @@ struct ublk_thread_info {
unsigned idx;
sem_t *ready;
cpu_set_t *affinity;
unsigned long long extra_flags;
};
static void *ublk_io_handler_fn(void *data)
@@ -844,7 +862,7 @@ static void *ublk_io_handler_fn(void *data)
t->dev = info->dev;
t->idx = info->idx;
ret = ublk_thread_init(t);
ret = ublk_thread_init(t, info->extra_flags);
if (ret) {
ublk_err("ublk dev %d thread %u init failed\n",
dev_id, t->idx);
@@ -934,6 +952,8 @@ static int ublk_start_daemon(const struct dev_ctx *ctx, struct ublk_dev *dev)
if (ctx->auto_zc_fallback)
extra_flags = UBLKS_Q_AUTO_BUF_REG_FALLBACK;
if (ctx->no_ublk_fixed_fd)
extra_flags |= UBLKS_Q_NO_UBLK_FIXED_FD;
for (i = 0; i < dinfo->nr_hw_queues; i++) {
dev->q[i].dev = dev;
@@ -951,6 +971,7 @@ static int ublk_start_daemon(const struct dev_ctx *ctx, struct ublk_dev *dev)
tinfo[i].dev = dev;
tinfo[i].idx = i;
tinfo[i].ready = &ready;
tinfo[i].extra_flags = extra_flags;
/*
* If threads are not tied 1:1 to queues, setting thread
@@ -1471,7 +1492,7 @@ static void __cmd_create_help(char *exe, bool recovery)
printf("%s %s -t [null|loop|stripe|fault_inject] [-q nr_queues] [-d depth] [-n dev_id]\n",
exe, recovery ? "recover" : "add");
printf("\t[--foreground] [--quiet] [-z] [--auto_zc] [--auto_zc_fallback] [--debug_mask mask] [-r 0|1 ] [-g]\n");
printf("\t[-e 0|1 ] [-i 0|1]\n");
printf("\t[-e 0|1 ] [-i 0|1] [--no_ublk_fixed_fd]\n");
printf("\t[--nthreads threads] [--per_io_tasks]\n");
printf("\t[target options] [backfile1] [backfile2] ...\n");
printf("\tdefault: nr_queues=2(max 32), depth=128(max 1024), dev_id=-1(auto allocation)\n");
@@ -1534,6 +1555,7 @@ int main(int argc, char *argv[])
{ "size", 1, NULL, 's'},
{ "nthreads", 1, NULL, 0 },
{ "per_io_tasks", 0, NULL, 0 },
{ "no_ublk_fixed_fd", 0, NULL, 0 },
{ 0, 0, 0, 0 }
};
const struct ublk_tgt_ops *ops = NULL;
@@ -1613,6 +1635,8 @@ int main(int argc, char *argv[])
ctx.nthreads = strtol(optarg, NULL, 10);
if (!strcmp(longopts[option_idx].name, "per_io_tasks"))
ctx.per_io_tasks = 1;
if (!strcmp(longopts[option_idx].name, "no_ublk_fixed_fd"))
ctx.no_ublk_fixed_fd = 1;
break;
case '?':
/*

45
tools/testing/selftests/ublk/kublk.h
View File

@@ -77,6 +77,7 @@ struct dev_ctx {
unsigned int recovery:1;
unsigned int auto_zc_fallback:1;
unsigned int per_io_tasks:1;
unsigned int no_ublk_fixed_fd:1;
int _evtfd;
int _shmid;
@@ -166,7 +167,9 @@ struct ublk_queue {
/* borrow one bit of ublk uapi flags, which may never be used */
#define UBLKS_Q_AUTO_BUF_REG_FALLBACK (1ULL << 63)
#define UBLKS_Q_NO_UBLK_FIXED_FD (1ULL << 62)
__u64 flags;
int ublk_fd; /* cached ublk char device fd */
struct ublk_io ios[UBLK_QUEUE_DEPTH];
};
@@ -273,34 +276,48 @@ static inline int ublk_io_alloc_sqes(struct ublk_thread *t,
return nr_sqes;
}
static inline void io_uring_prep_buf_register(struct io_uring_sqe *sqe,
int dev_fd, int tag, int q_id, __u64 index)
static inline int ublk_get_registered_fd(struct ublk_queue *q, int fd_index)
{
if (q->flags & UBLKS_Q_NO_UBLK_FIXED_FD) {
if (fd_index == 0)
/* Return the raw ublk FD for index 0 */
return q->ublk_fd;
/* Adjust index for backing files (index 1 becomes 0, etc.) */
return fd_index - 1;
}
return fd_index;
}
static inline void __io_uring_prep_buf_reg_unreg(struct io_uring_sqe *sqe,
struct ublk_queue *q, int tag, int q_id, __u64 index)
{
struct ublksrv_io_cmd *cmd = (struct ublksrv_io_cmd *)sqe->cmd;
int dev_fd = ublk_get_registered_fd(q, 0);
io_uring_prep_read(sqe, dev_fd, 0, 0, 0);
sqe->opcode = IORING_OP_URING_CMD;
sqe->flags |= IOSQE_FIXED_FILE;
sqe->cmd_op = UBLK_U_IO_REGISTER_IO_BUF;
if (q->flags & UBLKS_Q_NO_UBLK_FIXED_FD)
sqe->flags &= ~IOSQE_FIXED_FILE;
else
sqe->flags |= IOSQE_FIXED_FILE;
cmd->tag = tag;
cmd->addr = index;
cmd->q_id = q_id;
}
static inline void io_uring_prep_buf_unregister(struct io_uring_sqe *sqe,
int dev_fd, int tag, int q_id, __u64 index)
static inline void io_uring_prep_buf_register(struct io_uring_sqe *sqe,
struct ublk_queue *q, int tag, int q_id, __u64 index)
{
struct ublksrv_io_cmd *cmd = (struct ublksrv_io_cmd *)sqe->cmd;
__io_uring_prep_buf_reg_unreg(sqe, q, tag, q_id, index);
sqe->cmd_op = UBLK_U_IO_REGISTER_IO_BUF;
}
io_uring_prep_read(sqe, dev_fd, 0, 0, 0);
sqe->opcode = IORING_OP_URING_CMD;
sqe->flags |= IOSQE_FIXED_FILE;
static inline void io_uring_prep_buf_unregister(struct io_uring_sqe *sqe,
struct ublk_queue *q, int tag, int q_id, __u64 index)
{
__io_uring_prep_buf_reg_unreg(sqe, q, tag, q_id, index);
sqe->cmd_op = UBLK_U_IO_UNREGISTER_IO_BUF;
cmd->tag = tag;
cmd->addr = index;
cmd->q_id = q_id;
}
static inline void *ublk_get_sqe_cmd(const struct io_uring_sqe *sqe)

4
tools/testing/selftests/ublk/null.c
View File

@@ -63,7 +63,7 @@ static int null_queue_zc_io(struct ublk_thread *t, struct ublk_queue *q,
ublk_io_alloc_sqes(t, sqe, 3);
io_uring_prep_buf_register(sqe[0], 0, tag, q->q_id, ublk_get_io(q, tag)->buf_index);
io_uring_prep_buf_register(sqe[0], q, tag, q->q_id, ublk_get_io(q, tag)->buf_index);
sqe[0]->user_data = build_user_data(tag,
ublk_cmd_op_nr(sqe[0]->cmd_op), 0, q->q_id, 1);
sqe[0]->flags |= IOSQE_CQE_SKIP_SUCCESS | IOSQE_IO_HARDLINK;
@@ -71,7 +71,7 @@ static int null_queue_zc_io(struct ublk_thread *t, struct ublk_queue *q,
__setup_nop_io(tag, iod, sqe[1], q->q_id);
sqe[1]->flags |= IOSQE_IO_HARDLINK;
io_uring_prep_buf_unregister(sqe[2], 0, tag, q->q_id, ublk_get_io(q, tag)->buf_index);
io_uring_prep_buf_unregister(sqe[2], q, tag, q->q_id, ublk_get_io(q, tag)->buf_index);
sqe[2]->user_data = build_user_data(tag, ublk_cmd_op_nr(sqe[2]->cmd_op), 0, q->q_id, 1);
// buf register is marked as IOSQE_CQE_SKIP_SUCCESS

4
tools/testing/selftests/ublk/stripe.c
View File

@@ -142,7 +142,7 @@ static int stripe_queue_tgt_rw_io(struct ublk_thread *t, struct ublk_queue *q,
ublk_io_alloc_sqes(t, sqe, s->nr + extra);
if (zc) {
io_uring_prep_buf_register(sqe[0], 0, tag, q->q_id, io->buf_index);
io_uring_prep_buf_register(sqe[0], q, tag, q->q_id, io->buf_index);
sqe[0]->flags |= IOSQE_CQE_SKIP_SUCCESS | IOSQE_IO_HARDLINK;
sqe[0]->user_data = build_user_data(tag,
ublk_cmd_op_nr(sqe[0]->cmd_op), 0, q->q_id, 1);
@@ -168,7 +168,7 @@ static int stripe_queue_tgt_rw_io(struct ublk_thread *t, struct ublk_queue *q,
if (zc) {
struct io_uring_sqe *unreg = sqe[s->nr + 1];
io_uring_prep_buf_unregister(unreg, 0, tag, q->q_id, io->buf_index);
io_uring_prep_buf_unregister(unreg, q, tag, q->q_id, io->buf_index);
unreg->user_data = build_user_data(
tag, ublk_cmd_op_nr(unreg->cmd_op), 0, q->q_id, 1);
}

6
tools/testing/selftests/ublk/test_stress_04.sh
View File

@@ -28,14 +28,14 @@ _create_backfile 0 256M
_create_backfile 1 128M
_create_backfile 2 128M
ublk_io_and_kill_daemon 8G -t null -q 4 -z &
ublk_io_and_kill_daemon 256M -t loop -q 4 -z "${UBLK_BACKFILES[0]}" &
ublk_io_and_kill_daemon 8G -t null -q 4 -z --no_ublk_fixed_fd &
ublk_io_and_kill_daemon 256M -t loop -q 4 -z --no_ublk_fixed_fd "${UBLK_BACKFILES[0]}" &
ublk_io_and_kill_daemon 256M -t stripe -q 4 -z "${UBLK_BACKFILES[1]}" "${UBLK_BACKFILES[2]}" &
if _have_feature "AUTO_BUF_REG"; then
ublk_io_and_kill_daemon 8G -t null -q 4 --auto_zc &
ublk_io_and_kill_daemon 256M -t loop -q 4 --auto_zc "${UBLK_BACKFILES[0]}" &
ublk_io_and_kill_daemon 256M -t stripe -q 4 --auto_zc "${UBLK_BACKFILES[1]}" "${UBLK_BACKFILES[2]}" &
ublk_io_and_kill_daemon 256M -t stripe -q 4 --auto_zc --no_ublk_fixed_fd "${UBLK_BACKFILES[1]}" "${UBLK_BACKFILES[2]}" &
ublk_io_and_kill_daemon 8G -t null -q 4 -z --auto_zc --auto_zc_fallback &
fi