[Devel] [PATCH 02/15] fs/fuse kio: create sysfs stat directory
Pavel Butsykin
pbutsykin at virtuozzo.com
Fri May 17 16:20:35 MSK 2019
This patch implements the interfaces for initialize/finalize kio stat subsystem
and adds the creation of stat directory. The sysfs directory will be created
separately for each point.
Signed-off-by: Pavel Butsykin <pbutsykin at virtuozzo.com>
---
fs/fuse/Makefile | 3 +-
fs/fuse/control.c | 3 +-
fs/fuse/inode.c | 1 +
fs/fuse/kio/pcs/fuse_stat.c | 83 ++++++++++++++++++++++++++++++++++++++
fs/fuse/kio/pcs/fuse_stat.h | 11 +++++
fs/fuse/kio/pcs/pcs_cluster_core.c | 3 ++
fs/fuse/kio/pcs/pcs_req.h | 2 +
7 files changed, 104 insertions(+), 2 deletions(-)
create mode 100644 fs/fuse/kio/pcs/fuse_stat.c
create mode 100644 fs/fuse/kio/pcs/fuse_stat.h
diff --git a/fs/fuse/Makefile b/fs/fuse/Makefile
index 3eb06648da2c..87f655c596e6 100644
--- a/fs/fuse/Makefile
+++ b/fs/fuse/Makefile
@@ -24,6 +24,7 @@ fuse_kio_pcs-objs := kio/pcs/pcs_fuse_kdirect.o \
kio/pcs/pcs_cluster.o \
kio/pcs/pcs_cluster_core.o \
kio/pcs/pcs_cs.o \
- kio/pcs/fuse_io.o
+ kio/pcs/fuse_io.o \
+ kio/pcs/fuse_stat.o
fuse-objs := dev.o dir.o file.o inode.o control.o
diff --git a/fs/fuse/control.c b/fs/fuse/control.c
index 5ea8ab2165cf..e9734d597419 100644
--- a/fs/fuse/control.c
+++ b/fs/fuse/control.c
@@ -18,7 +18,8 @@
* This is non-NULL when the single instance of the control filesystem
* exists. Protected by fuse_mutex
*/
-static struct super_block *fuse_control_sb;
+struct super_block *fuse_control_sb;
+EXPORT_SYMBOL_GPL(fuse_control_sb);
static struct fuse_conn *fuse_ctl_file_conn_get(struct file *file)
{
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index 25f6e0ceac37..ff3fbc0a779b 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -31,6 +31,7 @@ static struct kmem_cache *fuse_inode_cachep;
static LIST_HEAD(fuse_kios_list);
struct list_head fuse_conn_list;
DEFINE_MUTEX(fuse_mutex);
+EXPORT_SYMBOL_GPL(fuse_mutex);
static int fuse_ve_odirect;
diff --git a/fs/fuse/kio/pcs/fuse_stat.c b/fs/fuse/kio/pcs/fuse_stat.c
new file mode 100644
index 000000000000..da8428ebe600
--- /dev/null
+++ b/fs/fuse/kio/pcs/fuse_stat.c
@@ -0,0 +1,83 @@
+#include <net/sock.h>
+#include <linux/types.h>
+
+#include "fuse_stat.h"
+#include "pcs_cluster.h"
+
+extern struct super_block *fuse_control_sb;
+
+static struct dentry *fuse_kio_add_dentry(struct dentry *parent,
+ struct fuse_conn *fc,
+ const char *name,
+ int mode, int nlink,
+ const struct inode_operations *iop,
+ const struct file_operations *fop,
+ void *ctx)
+{
+ struct inode *inode;
+ struct dentry *dentry = d_alloc_name(parent, name);
+
+ if (!dentry)
+ return NULL;
+
+ inode = new_inode(fc->sb);
+ if (!inode) {
+ dput(dentry);
+ return NULL;
+ }
+
+ inode->i_ino = get_next_ino();
+ inode->i_mode = mode;
+ inode->i_uid = fc->user_id;
+ inode->i_gid = fc->group_id;
+ inode->i_atime = inode->i_mtime = inode->i_ctime = CURRENT_TIME;
+ if (iop)
+ inode->i_op = iop;
+ inode->i_fop = fop;
+ set_nlink(inode, nlink);
+ inode->i_private = ctx;
+ d_add(dentry, inode);
+
+ return dentry;
+}
+
+static void fuse_kio_rm_dentry(struct dentry *dentry)
+{
+ d_inode(dentry)->i_private = NULL;
+ d_drop(dentry);
+ dput(dentry);
+}
+
+void pcs_fuse_stat_init(struct pcs_fuse_stat *stat)
+{
+ struct fuse_conn *fc =
+ container_of(stat, struct pcs_fuse_cluster, cc.stat)->fc;
+
+ mutex_lock(&fuse_mutex);
+ if (!fuse_control_sb)
+ goto out;
+
+ stat->kio_stat = fuse_kio_add_dentry(fc->conn_ctl, fc, "kio_stat",
+ S_IFDIR | S_IXUSR, 2,
+ &simple_dir_inode_operations,
+ &simple_dir_operations, fc);
+ if (!stat->kio_stat) {
+ pr_err("kio: can't create kio stat directory");
+ goto out;
+ }
+
+ /* Stat initialize */
+out:
+ mutex_unlock(&fuse_mutex);
+}
+
+void pcs_fuse_stat_fini(struct pcs_fuse_stat *stat)
+{
+ if (!stat->kio_stat)
+ return;
+
+ mutex_lock(&fuse_mutex);
+ if (fuse_control_sb)
+ fuse_kio_rm_dentry(stat->kio_stat);
+ mutex_unlock(&fuse_mutex);
+}
diff --git a/fs/fuse/kio/pcs/fuse_stat.h b/fs/fuse/kio/pcs/fuse_stat.h
new file mode 100644
index 000000000000..14687ffd83f2
--- /dev/null
+++ b/fs/fuse/kio/pcs/fuse_stat.h
@@ -0,0 +1,11 @@
+#ifndef _FUSE_STAT_H_
+#define _FUSE_STAT_H_ 1
+
+struct pcs_fuse_stat {
+ struct dentry *kio_stat;
+};
+
+void pcs_fuse_stat_init(struct pcs_fuse_stat *stat);
+void pcs_fuse_stat_fini(struct pcs_fuse_stat *stat);
+
+#endif /* _FUSE_STAT_H_ */
\ No newline at end of file
diff --git a/fs/fuse/kio/pcs/pcs_cluster_core.c b/fs/fuse/kio/pcs/pcs_cluster_core.c
index d1379c99ac6a..aa54ca8d6b45 100644
--- a/fs/fuse/kio/pcs/pcs_cluster_core.c
+++ b/fs/fuse/kio/pcs/pcs_cluster_core.c
@@ -151,6 +151,8 @@ int pcs_cc_init(struct pcs_cluster_core *cc, struct workqueue_struct *wq,
* pcs_srandomdev(&cc->rng);
*/
+ pcs_fuse_stat_init(&cc->stat);
+
memset(&cc->cfg, 0, sizeof(cc->cfg));
memset(&cc->op, 0, sizeof(cc->op));
@@ -177,6 +179,7 @@ void pcs_cc_fini(struct pcs_cluster_core *cc)
pcs_csset_fini(&cc->css);
pcs_mapset_fini(&cc->maps);
pcs_rpc_engine_fini(&cc->eng);
+ pcs_fuse_stat_fini(&cc->stat);
BUG_ON(!list_empty(&cc->completion_queue));
BUG_ON(!list_empty(&cc->work_queue));
diff --git a/fs/fuse/kio/pcs/pcs_req.h b/fs/fuse/kio/pcs/pcs_req.h
index e668e55f0b71..3a9534b1a5af 100644
--- a/fs/fuse/kio/pcs/pcs_req.h
+++ b/fs/fuse/kio/pcs/pcs_req.h
@@ -8,6 +8,7 @@
#include "pcs_cs_prot.h"
#include "pcs_rpc.h"
#include "pcs_cs.h"
+#include "fuse_stat.h"
///////////////////////////
@@ -207,6 +208,7 @@ struct pcs_cluster_core
//// struct pcs_ratelimit rlim; /* Rate limiter */
//// struct pcs_rng rng;
/* <SKIP */
+ struct pcs_fuse_stat stat;
struct {
struct pcs_clnt_config def;
--
2.15.1
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