struct blk_mq_debugfs_attr {
const char *name;
umode_t mode;
- const struct file_operations *fops;
+ int (*show)(void *, struct seq_file *);
+ ssize_t (*write)(void *, const char __user *, size_t, loff_t *);
+ /* Set either .show or .seq_ops. */
+ const struct seq_operations *seq_ops;
};
-static int blk_mq_debugfs_seq_open(struct inode *inode, struct file *file,
- const struct seq_operations *ops)
-{
- struct seq_file *m;
- int ret;
-
- ret = seq_open(file, ops);
- if (!ret) {
- m = file->private_data;
- m->private = inode->i_private;
- }
- return ret;
-}
-
static int blk_flags_show(struct seq_file *m, const unsigned long flags,
const char *const *flag_name, int flag_name_count)
{
};
#undef QUEUE_FLAG_NAME
-static int blk_queue_flags_show(struct seq_file *m, void *v)
+static int queue_state_show(void *data, struct seq_file *m)
{
- struct request_queue *q = m->private;
+ struct request_queue *q = data;
blk_flags_show(m, q->queue_flags, blk_queue_flag_name,
ARRAY_SIZE(blk_queue_flag_name));
return 0;
}
-static ssize_t blk_queue_flags_store(struct file *file, const char __user *buf,
- size_t count, loff_t *ppos)
+static ssize_t queue_state_write(void *data, const char __user *buf,
+ size_t count, loff_t *ppos)
{
- struct request_queue *q = file_inode(file)->i_private;
+ struct request_queue *q = data;
char opbuf[16] = { }, *op;
if (count >= sizeof(opbuf)) {
return count;
}
-static int blk_queue_flags_open(struct inode *inode, struct file *file)
-{
- return single_open(file, blk_queue_flags_show, inode->i_private);
-}
-
-static const struct file_operations blk_queue_flags_fops = {
- .open = blk_queue_flags_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
- .write = blk_queue_flags_store,
-};
-
static void print_stat(struct seq_file *m, struct blk_rq_stat *stat)
{
if (stat->nr_samples) {
}
}
-static int queue_poll_stat_show(struct seq_file *m, void *v)
+static int queue_poll_stat_show(void *data, struct seq_file *m)
{
- struct request_queue *q = m->private;
+ struct request_queue *q = data;
int bucket;
for (bucket = 0; bucket < BLK_MQ_POLL_STATS_BKTS/2; bucket++) {
return 0;
}
-static int queue_poll_stat_open(struct inode *inode, struct file *file)
-{
- return single_open(file, queue_poll_stat_show, inode->i_private);
-}
-
-static const struct file_operations queue_poll_stat_fops = {
- .open = queue_poll_stat_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
#define HCTX_STATE_NAME(name) [BLK_MQ_S_##name] = #name
static const char *const hctx_state_name[] = {
HCTX_STATE_NAME(STOPPED),
};
#undef HCTX_STATE_NAME
-static int hctx_state_show(struct seq_file *m, void *v)
+static int hctx_state_show(void *data, struct seq_file *m)
{
- struct blk_mq_hw_ctx *hctx = m->private;
+ struct blk_mq_hw_ctx *hctx = data;
blk_flags_show(m, hctx->state, hctx_state_name,
ARRAY_SIZE(hctx_state_name));
return 0;
}
-static int hctx_state_open(struct inode *inode, struct file *file)
-{
- return single_open(file, hctx_state_show, inode->i_private);
-}
-
-static const struct file_operations hctx_state_fops = {
- .open = hctx_state_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
#define BLK_TAG_ALLOC_NAME(name) [BLK_TAG_ALLOC_##name] = #name
static const char *const alloc_policy_name[] = {
BLK_TAG_ALLOC_NAME(FIFO),
};
#undef HCTX_FLAG_NAME
-static int hctx_flags_show(struct seq_file *m, void *v)
+static int hctx_flags_show(void *data, struct seq_file *m)
{
- struct blk_mq_hw_ctx *hctx = m->private;
+ struct blk_mq_hw_ctx *hctx = data;
const int alloc_policy = BLK_MQ_FLAG_TO_ALLOC_POLICY(hctx->flags);
seq_puts(m, "alloc_policy=");
return 0;
}
-static int hctx_flags_open(struct inode *inode, struct file *file)
-{
- return single_open(file, hctx_flags_show, inode->i_private);
-}
-
-static const struct file_operations hctx_flags_fops = {
- .open = hctx_flags_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
#define REQ_OP_NAME(name) [REQ_OP_##name] = #name
static const char *const op_name[] = {
REQ_OP_NAME(READ),
.show = blk_mq_debugfs_rq_show,
};
-static int hctx_dispatch_open(struct inode *inode, struct file *file)
-{
- return blk_mq_debugfs_seq_open(inode, file, &hctx_dispatch_seq_ops);
-}
-
-static const struct file_operations hctx_dispatch_fops = {
- .open = hctx_dispatch_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = seq_release,
-};
-
-static int hctx_ctx_map_show(struct seq_file *m, void *v)
+static int hctx_ctx_map_show(void *data, struct seq_file *m)
{
- struct blk_mq_hw_ctx *hctx = m->private;
+ struct blk_mq_hw_ctx *hctx = data;
sbitmap_bitmap_show(&hctx->ctx_map, m);
return 0;
}
-static int hctx_ctx_map_open(struct inode *inode, struct file *file)
-{
- return single_open(file, hctx_ctx_map_show, inode->i_private);
-}
-
-static const struct file_operations hctx_ctx_map_fops = {
- .open = hctx_ctx_map_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
static void blk_mq_debugfs_tags_show(struct seq_file *m,
struct blk_mq_tags *tags)
{
}
}
-static int hctx_tags_show(struct seq_file *m, void *v)
+static int hctx_tags_show(void *data, struct seq_file *m)
{
- struct blk_mq_hw_ctx *hctx = m->private;
+ struct blk_mq_hw_ctx *hctx = data;
struct request_queue *q = hctx->queue;
int res;
return res;
}
-static int hctx_tags_open(struct inode *inode, struct file *file)
-{
- return single_open(file, hctx_tags_show, inode->i_private);
-}
-
-static const struct file_operations hctx_tags_fops = {
- .open = hctx_tags_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-static int hctx_tags_bitmap_show(struct seq_file *m, void *v)
+static int hctx_tags_bitmap_show(void *data, struct seq_file *m)
{
- struct blk_mq_hw_ctx *hctx = m->private;
+ struct blk_mq_hw_ctx *hctx = data;
struct request_queue *q = hctx->queue;
int res;
return res;
}
-static int hctx_tags_bitmap_open(struct inode *inode, struct file *file)
-{
- return single_open(file, hctx_tags_bitmap_show, inode->i_private);
-}
-
-static const struct file_operations hctx_tags_bitmap_fops = {
- .open = hctx_tags_bitmap_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-static int hctx_sched_tags_show(struct seq_file *m, void *v)
+static int hctx_sched_tags_show(void *data, struct seq_file *m)
{
- struct blk_mq_hw_ctx *hctx = m->private;
+ struct blk_mq_hw_ctx *hctx = data;
struct request_queue *q = hctx->queue;
int res;
return res;
}
-static int hctx_sched_tags_open(struct inode *inode, struct file *file)
-{
- return single_open(file, hctx_sched_tags_show, inode->i_private);
-}
-
-static const struct file_operations hctx_sched_tags_fops = {
- .open = hctx_sched_tags_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-static int hctx_sched_tags_bitmap_show(struct seq_file *m, void *v)
+static int hctx_sched_tags_bitmap_show(void *data, struct seq_file *m)
{
- struct blk_mq_hw_ctx *hctx = m->private;
+ struct blk_mq_hw_ctx *hctx = data;
struct request_queue *q = hctx->queue;
int res;
return res;
}
-static int hctx_sched_tags_bitmap_open(struct inode *inode, struct file *file)
-{
- return single_open(file, hctx_sched_tags_bitmap_show, inode->i_private);
-}
-
-static const struct file_operations hctx_sched_tags_bitmap_fops = {
- .open = hctx_sched_tags_bitmap_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-static int hctx_io_poll_show(struct seq_file *m, void *v)
+static int hctx_io_poll_show(void *data, struct seq_file *m)
{
- struct blk_mq_hw_ctx *hctx = m->private;
+ struct blk_mq_hw_ctx *hctx = data;
seq_printf(m, "considered=%lu\n", hctx->poll_considered);
seq_printf(m, "invoked=%lu\n", hctx->poll_invoked);
return 0;
}
-static int hctx_io_poll_open(struct inode *inode, struct file *file)
-{
- return single_open(file, hctx_io_poll_show, inode->i_private);
-}
-
-static ssize_t hctx_io_poll_write(struct file *file, const char __user *buf,
+static ssize_t hctx_io_poll_write(void *data, const char __user *buf,
size_t count, loff_t *ppos)
{
- struct seq_file *m = file->private_data;
- struct blk_mq_hw_ctx *hctx = m->private;
+ struct blk_mq_hw_ctx *hctx = data;
hctx->poll_considered = hctx->poll_invoked = hctx->poll_success = 0;
return count;
}
-static const struct file_operations hctx_io_poll_fops = {
- .open = hctx_io_poll_open,
- .read = seq_read,
- .write = hctx_io_poll_write,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-static int hctx_dispatched_show(struct seq_file *m, void *v)
+static int hctx_dispatched_show(void *data, struct seq_file *m)
{
- struct blk_mq_hw_ctx *hctx = m->private;
+ struct blk_mq_hw_ctx *hctx = data;
int i;
seq_printf(m, "%8u\t%lu\n", 0U, hctx->dispatched[0]);
return 0;
}
-static int hctx_dispatched_open(struct inode *inode, struct file *file)
-{
- return single_open(file, hctx_dispatched_show, inode->i_private);
-}
-
-static ssize_t hctx_dispatched_write(struct file *file, const char __user *buf,
+static ssize_t hctx_dispatched_write(void *data, const char __user *buf,
size_t count, loff_t *ppos)
{
- struct seq_file *m = file->private_data;
- struct blk_mq_hw_ctx *hctx = m->private;
+ struct blk_mq_hw_ctx *hctx = data;
int i;
for (i = 0; i < BLK_MQ_MAX_DISPATCH_ORDER; i++)
return count;
}
-static const struct file_operations hctx_dispatched_fops = {
- .open = hctx_dispatched_open,
- .read = seq_read,
- .write = hctx_dispatched_write,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-static int hctx_queued_show(struct seq_file *m, void *v)
+static int hctx_queued_show(void *data, struct seq_file *m)
{
- struct blk_mq_hw_ctx *hctx = m->private;
+ struct blk_mq_hw_ctx *hctx = data;
seq_printf(m, "%lu\n", hctx->queued);
return 0;
}
-static int hctx_queued_open(struct inode *inode, struct file *file)
-{
- return single_open(file, hctx_queued_show, inode->i_private);
-}
-
-static ssize_t hctx_queued_write(struct file *file, const char __user *buf,
+static ssize_t hctx_queued_write(void *data, const char __user *buf,
size_t count, loff_t *ppos)
{
- struct seq_file *m = file->private_data;
- struct blk_mq_hw_ctx *hctx = m->private;
+ struct blk_mq_hw_ctx *hctx = data;
hctx->queued = 0;
return count;
}
-static const struct file_operations hctx_queued_fops = {
- .open = hctx_queued_open,
- .read = seq_read,
- .write = hctx_queued_write,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-static int hctx_run_show(struct seq_file *m, void *v)
+static int hctx_run_show(void *data, struct seq_file *m)
{
- struct blk_mq_hw_ctx *hctx = m->private;
+ struct blk_mq_hw_ctx *hctx = data;
seq_printf(m, "%lu\n", hctx->run);
return 0;
}
-static int hctx_run_open(struct inode *inode, struct file *file)
+static ssize_t hctx_run_write(void *data, const char __user *buf, size_t count,
+ loff_t *ppos)
{
- return single_open(file, hctx_run_show, inode->i_private);
-}
-
-static ssize_t hctx_run_write(struct file *file, const char __user *buf,
- size_t count, loff_t *ppos)
-{
- struct seq_file *m = file->private_data;
- struct blk_mq_hw_ctx *hctx = m->private;
+ struct blk_mq_hw_ctx *hctx = data;
hctx->run = 0;
return count;
}
-static const struct file_operations hctx_run_fops = {
- .open = hctx_run_open,
- .read = seq_read,
- .write = hctx_run_write,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-static int hctx_active_show(struct seq_file *m, void *v)
+static int hctx_active_show(void *data, struct seq_file *m)
{
- struct blk_mq_hw_ctx *hctx = m->private;
+ struct blk_mq_hw_ctx *hctx = data;
seq_printf(m, "%d\n", atomic_read(&hctx->nr_active));
return 0;
}
-static int hctx_active_open(struct inode *inode, struct file *file)
-{
- return single_open(file, hctx_active_show, inode->i_private);
-}
-
-static const struct file_operations hctx_active_fops = {
- .open = hctx_active_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
static void *ctx_rq_list_start(struct seq_file *m, loff_t *pos)
__acquires(&ctx->lock)
{
.stop = ctx_rq_list_stop,
.show = blk_mq_debugfs_rq_show,
};
-
-static int ctx_rq_list_open(struct inode *inode, struct file *file)
-{
- return blk_mq_debugfs_seq_open(inode, file, &ctx_rq_list_seq_ops);
-}
-
-static const struct file_operations ctx_rq_list_fops = {
- .open = ctx_rq_list_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = seq_release,
-};
-
-static int ctx_dispatched_show(struct seq_file *m, void *v)
+static int ctx_dispatched_show(void *data, struct seq_file *m)
{
- struct blk_mq_ctx *ctx = m->private;
+ struct blk_mq_ctx *ctx = data;
seq_printf(m, "%lu %lu\n", ctx->rq_dispatched[1], ctx->rq_dispatched[0]);
return 0;
}
-static int ctx_dispatched_open(struct inode *inode, struct file *file)
-{
- return single_open(file, ctx_dispatched_show, inode->i_private);
-}
-
-static ssize_t ctx_dispatched_write(struct file *file, const char __user *buf,
+static ssize_t ctx_dispatched_write(void *data, const char __user *buf,
size_t count, loff_t *ppos)
{
- struct seq_file *m = file->private_data;
- struct blk_mq_ctx *ctx = m->private;
+ struct blk_mq_ctx *ctx = data;
ctx->rq_dispatched[0] = ctx->rq_dispatched[1] = 0;
return count;
}
-static const struct file_operations ctx_dispatched_fops = {
- .open = ctx_dispatched_open,
- .read = seq_read,
- .write = ctx_dispatched_write,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-static int ctx_merged_show(struct seq_file *m, void *v)
+static int ctx_merged_show(void *data, struct seq_file *m)
{
- struct blk_mq_ctx *ctx = m->private;
+ struct blk_mq_ctx *ctx = data;
seq_printf(m, "%lu\n", ctx->rq_merged);
return 0;
}
-static int ctx_merged_open(struct inode *inode, struct file *file)
-{
- return single_open(file, ctx_merged_show, inode->i_private);
-}
-
-static ssize_t ctx_merged_write(struct file *file, const char __user *buf,
- size_t count, loff_t *ppos)
+static ssize_t ctx_merged_write(void *data, const char __user *buf,
+ size_t count, loff_t *ppos)
{
- struct seq_file *m = file->private_data;
- struct blk_mq_ctx *ctx = m->private;
+ struct blk_mq_ctx *ctx = data;
ctx->rq_merged = 0;
return count;
}
-static const struct file_operations ctx_merged_fops = {
- .open = ctx_merged_open,
- .read = seq_read,
- .write = ctx_merged_write,
- .llseek = seq_lseek,
- .release = single_release,
-};
-
-static int ctx_completed_show(struct seq_file *m, void *v)
+static int ctx_completed_show(void *data, struct seq_file *m)
{
- struct blk_mq_ctx *ctx = m->private;
+ struct blk_mq_ctx *ctx = data;
seq_printf(m, "%lu %lu\n", ctx->rq_completed[1], ctx->rq_completed[0]);
return 0;
}
-static int ctx_completed_open(struct inode *inode, struct file *file)
+static ssize_t ctx_completed_write(void *data, const char __user *buf,
+ size_t count, loff_t *ppos)
{
- return single_open(file, ctx_completed_show, inode->i_private);
+ struct blk_mq_ctx *ctx = data;
+
+ ctx->rq_completed[0] = ctx->rq_completed[1] = 0;
+ return count;
}
-static ssize_t ctx_completed_write(struct file *file, const char __user *buf,
- size_t count, loff_t *ppos)
+static int blk_mq_debugfs_show(struct seq_file *m, void *v)
+{
+ const struct blk_mq_debugfs_attr *attr = m->private;
+ void *data = d_inode(m->file->f_path.dentry->d_parent)->i_private;
+
+ return attr->show(data, m);
+}
+
+static ssize_t blk_mq_debugfs_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *ppos)
{
struct seq_file *m = file->private_data;
- struct blk_mq_ctx *ctx = m->private;
+ const struct blk_mq_debugfs_attr *attr = m->private;
+ void *data = d_inode(file->f_path.dentry->d_parent)->i_private;
- ctx->rq_completed[0] = ctx->rq_completed[1] = 0;
- return count;
+ if (!attr->write)
+ return -EPERM;
+
+ return attr->write(data, buf, count, ppos);
+}
+
+static int blk_mq_debugfs_open(struct inode *inode, struct file *file)
+{
+ const struct blk_mq_debugfs_attr *attr = inode->i_private;
+ void *data = d_inode(file->f_path.dentry->d_parent)->i_private;
+ struct seq_file *m;
+ int ret;
+
+ if (attr->seq_ops) {
+ ret = seq_open(file, attr->seq_ops);
+ if (!ret) {
+ m = file->private_data;
+ m->private = data;
+ }
+ return ret;
+ }
+
+ if (WARN_ON_ONCE(!attr->show))
+ return -EPERM;
+
+ return single_open(file, blk_mq_debugfs_show, inode->i_private);
}
-static const struct file_operations ctx_completed_fops = {
- .open = ctx_completed_open,
+static int blk_mq_debugfs_release(struct inode *inode, struct file *file)
+{
+ const struct blk_mq_debugfs_attr *attr = inode->i_private;
+
+ if (attr->show)
+ return single_release(inode, file);
+ else
+ return seq_release(inode, file);
+}
+
+const struct file_operations blk_mq_debugfs_fops = {
+ .open = blk_mq_debugfs_open,
.read = seq_read,
- .write = ctx_completed_write,
+ .write = blk_mq_debugfs_write,
.llseek = seq_lseek,
- .release = single_release,
+ .release = blk_mq_debugfs_release,
};
static const struct blk_mq_debugfs_attr blk_mq_debugfs_queue_attrs[] = {
- {"poll_stat", 0400, &queue_poll_stat_fops},
- {"state", 0600, &blk_queue_flags_fops},
+ {"poll_stat", 0400, queue_poll_stat_show},
+ {"state", 0600, queue_state_show, queue_state_write},
{},
};
static const struct blk_mq_debugfs_attr blk_mq_debugfs_hctx_attrs[] = {
- {"state", 0400, &hctx_state_fops},
- {"flags", 0400, &hctx_flags_fops},
- {"dispatch", 0400, &hctx_dispatch_fops},
- {"ctx_map", 0400, &hctx_ctx_map_fops},
- {"tags", 0400, &hctx_tags_fops},
- {"tags_bitmap", 0400, &hctx_tags_bitmap_fops},
- {"sched_tags", 0400, &hctx_sched_tags_fops},
- {"sched_tags_bitmap", 0400, &hctx_sched_tags_bitmap_fops},
- {"io_poll", 0600, &hctx_io_poll_fops},
- {"dispatched", 0600, &hctx_dispatched_fops},
- {"queued", 0600, &hctx_queued_fops},
- {"run", 0600, &hctx_run_fops},
- {"active", 0400, &hctx_active_fops},
+ {"state", 0400, hctx_state_show},
+ {"flags", 0400, hctx_flags_show},
+ {"dispatch", 0400, .seq_ops = &hctx_dispatch_seq_ops},
+ {"ctx_map", 0400, hctx_ctx_map_show},
+ {"tags", 0400, hctx_tags_show},
+ {"tags_bitmap", 0400, hctx_tags_bitmap_show},
+ {"sched_tags", 0400, hctx_sched_tags_show},
+ {"sched_tags_bitmap", 0400, hctx_sched_tags_bitmap_show},
+ {"io_poll", 0600, hctx_io_poll_show, hctx_io_poll_write},
+ {"dispatched", 0600, hctx_dispatched_show, hctx_dispatched_write},
+ {"queued", 0600, hctx_queued_show, hctx_queued_write},
+ {"run", 0600, hctx_run_show, hctx_run_write},
+ {"active", 0400, hctx_active_show},
{},
};
static const struct blk_mq_debugfs_attr blk_mq_debugfs_ctx_attrs[] = {
- {"rq_list", 0400, &ctx_rq_list_fops},
- {"dispatched", 0600, &ctx_dispatched_fops},
- {"merged", 0600, &ctx_merged_fops},
- {"completed", 0600, &ctx_completed_fops},
+ {"rq_list", 0400, .seq_ops = &ctx_rq_list_seq_ops},
+ {"dispatched", 0600, ctx_dispatched_show, ctx_dispatched_write},
+ {"merged", 0600, ctx_merged_show, ctx_merged_write},
+ {"completed", 0600, ctx_completed_show, ctx_completed_write},
{},
};
}
static bool debugfs_create_files(struct dentry *parent, void *data,
- const struct blk_mq_debugfs_attr *attr)
+ const struct blk_mq_debugfs_attr *attr)
{
+ d_inode(parent)->i_private = data;
+
for (; attr->name; attr++) {
if (!debugfs_create_file(attr->name, attr->mode, parent,
- data, attr->fops))
+ (void *)attr, &blk_mq_debugfs_fops))
return false;
}
return true;
projects / kernel.git / commitdiff