The commit is pushed to "branch-rh7-3.10.0-957.12.2.vz7.96.x-ovz" and will
appear at https://src.openvz.org/scm/ovz/vzkernel.git
after rh7-3.10.0-957.12.2.vz7.96.1
------>
commit ba2e64e8cadc103132ab5d727fe0a7a868191819
Author: Pavel Butsykin <pbutsy...@virtuozzo.com>
Date: Tue May 21 18:47:41 2019 +0300
fs/fuse kio: make interface pcs_kio_req_list() for listing kio reqs
This is preparation patch that implements common interface
pcs_kio_req_list(),
which will be needed to collect kio requests statistics.
Signed-off-by: Pavel Butsykin <pbutsy...@virtuozzo.com>
=====================
Patchset description:
Statistics for vstorage kernel fast-path
Vstorage provides plenty of statistics information via 'vstorage -c cl
mnt-top',
but when it comes kernel fast-path, it doesn't work. All because mnt-top
command collects information from .vstorage.info directory, where
vstorage-mount
provides a lot of different statistical information in the form of files,
but
it was not implemented for for fast-path.
This patch-set is aimed to implementation of the support of some statistics
inforamtion files from .vstorage.info:
cs_stats
fstat
fstat_lat
iostat
requests
Which will be located at "/sys/fs/fuse/connections/*mnt_id*/kio_stat/". This
will be enough to maintain vstorage mnt-top command for fast-path mount
points.
https://pmc.acronis.com/browse/VSTOR-20979
Pavel Butsykin (15):
fs/fuse: add conn_ctl to fuse_conn struct
fs/fuse kio: create sysfs stat directory
fs/fuse kio: implement iostat
fs/fuse kio: make common interface pcs_kio_file_list() for listing kio
files
fs/fuse kio: make common interface pcs_kio_req_list() for listing kio reqs
fs/fuse kio: add retry counter for kio requests
fs/fuse kio: implement pcs_strerror()
fs/fuse kio: implement requests statistics
fs/fuse kio: implement fstat statistics info
fs/fuse kio: implement fstat_lat statistics info
fs/fuse kio: remove useless pcs_cs initialization
fs/fuse kio: implement cs statistics accounting
fs/fuse kio: convert rpc state id to string
fs/fuse kio: implement cs_stats statistics info
fs/fuse kio: add locked cs_get_avg_in_flight()
---
fs/fuse/kio/pcs/pcs_fuse_kdirect.c | 27 +++++++++++++++++++++++++++
fs/fuse/kio/pcs/pcs_req.h | 3 +++
2 files changed, 30 insertions(+)
diff --git a/fs/fuse/kio/pcs/pcs_fuse_kdirect.c
b/fs/fuse/kio/pcs/pcs_fuse_kdirect.c
index 2d3d7c6138cd..d837bf3051ed 100644
--- a/fs/fuse/kio/pcs/pcs_fuse_kdirect.c
+++ b/fs/fuse/kio/pcs/pcs_fuse_kdirect.c
@@ -1539,6 +1539,33 @@ void pcs_kio_file_list(struct fuse_conn *fc,
kio_file_itr kfile_cb, void *ctx)
}
}
+struct kreq_list_ctx {
+ kio_req_itr cb;
+ void *ctx;
+};
+
+static void kpcs_req_list_itr(struct fuse_file *ff, struct pcs_dentry_info *di,
+ void *ctx)
+{
+ struct fuse_req *req;
+ struct kreq_list_ctx *kreq_ctx = ctx;
+
+ spin_lock(&di->kq_lock);
+ list_for_each_entry(req, &di->kq, list) {
+ kreq_ctx->cb(ff, req, kreq_ctx->ctx);
+ }
+ spin_unlock(&di->kq_lock);
+}
+
+void pcs_kio_req_list(struct fuse_conn *fc, kio_req_itr kreq_cb, void *ctx)
+{
+ struct kreq_list_ctx kreq_ctx = {
+ .cb = kreq_cb,
+ .ctx = ctx,
+ };
+ pcs_kio_file_list(fc, kpcs_req_list_itr, &kreq_ctx);
+}
+
static void kpcs_kill_lreq_itr(struct fuse_file *ff, struct pcs_dentry_info
*di,
void *ctx)
{
diff --git a/fs/fuse/kio/pcs/pcs_req.h b/fs/fuse/kio/pcs/pcs_req.h
index 0bb3b9144cae..3f26aa3489ff 100644
--- a/fs/fuse/kio/pcs/pcs_req.h
+++ b/fs/fuse/kio/pcs/pcs_req.h
@@ -331,5 +331,8 @@ void pcs_ireq_queue_fail(struct list_head *queue, int
error);
typedef void (*kio_file_itr)(struct fuse_file *ff, struct pcs_dentry_info *di,
void *ctx);
void pcs_kio_file_list(struct fuse_conn *fc, kio_file_itr kfile_cb, void *ctx);
+typedef void (*kio_req_itr)(struct fuse_file *ff, struct fuse_req *req,
+ void *ctx);
+void pcs_kio_req_list(struct fuse_conn *fc, kio_req_itr kreq_cb, void *ctx);
#endif /* _PCS_REQ_H_ */
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