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Message-Id: <1450905892-31089-3-git-send-email-jsimmons@infradead.org>
Date: Wed, 23 Dec 2015 16:24:41 -0500
From: James Simmons <jsimmons@...radead.org>
To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
devel@...verdev.osuosl.org, Oleg Drokin <oleg.drokin@...el.com>,
Andreas Dilger <andreas.dilger@...el.com>
Cc: Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
lustre-devel@...ts.lustre.org, Henri Doreau <henri.doreau@....fr>,
James Simmons <jsimmons@...radead.org>
Subject: [PATCH v2 02/13] staging: lustre: Prevent duplicate CT registrations
From: Henri Doreau <henri.doreau@....fr>
Associate copytool registration to a given MDC import so that
multiple mounts of the same filesystem do not lead to having the
copytool registered multiple time.
Signed-off-by: Henri Doreau <henri.doreau@....fr>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-3882
Reviewed-on: http://review.whamcloud.com/7612
Reviewed-by: John L. Hammond <john.hammond@...el.com>
Reviewed-by: Jinshan Xiong <jinshan.xiong@...el.com>
Reviewed-by: Oleg Drokin <oleg.drokin@...el.com>
Signed-off-by: James Simmons <jsimmons@...radead.org>
---
.../include/linux/libcfs/libcfs_kernelcomm.h | 6 ++--
.../staging/lustre/lustre/include/lustre_export.h | 7 ++++
.../lustre/lustre/libcfs/kernel_user_comm.c | 15 +++++---
drivers/staging/lustre/lustre/lmv/lmv_obd.c | 39 +++++++++++++++-----
drivers/staging/lustre/lustre/mdc/mdc_request.c | 22 +++++++----
5 files changed, 62 insertions(+), 27 deletions(-)
diff --git a/drivers/staging/lustre/include/linux/libcfs/libcfs_kernelcomm.h b/drivers/staging/lustre/include/linux/libcfs/libcfs_kernelcomm.h
index 41f3d81..3a89a3b 100644
--- a/drivers/staging/lustre/include/linux/libcfs/libcfs_kernelcomm.h
+++ b/drivers/staging/lustre/include/linux/libcfs/libcfs_kernelcomm.h
@@ -77,7 +77,7 @@ enum kuc_generic_message_type {
};
/* prototype for callback function on kuc groups */
-typedef int (*libcfs_kkuc_cb_t)(__u32 data, void *cb_arg);
+typedef int (*libcfs_kkuc_cb_t)(void *data, void *cb_arg);
/* KUC Broadcast Groups. This determines which userspace process hears which
* messages. Mutliple transports may be used within a group, or multiple
@@ -92,8 +92,8 @@ typedef int (*libcfs_kkuc_cb_t)(__u32 data, void *cb_arg);
int libcfs_kkuc_msg_put(struct file *fp, void *payload);
int libcfs_kkuc_group_put(int group, void *payload);
int libcfs_kkuc_group_add(struct file *fp, int uid, unsigned int group,
- __u32 data);
-int libcfs_kkuc_group_rem(int uid, int group);
+ void *data);
+int libcfs_kkuc_group_rem(int uid, int group, void **pdata);
int libcfs_kkuc_group_foreach(int group, libcfs_kkuc_cb_t cb_func,
void *cb_arg);
diff --git a/drivers/staging/lustre/lustre/include/lustre_export.h b/drivers/staging/lustre/lustre/include/lustre_export.h
index 311e5aa..a030a98 100644
--- a/drivers/staging/lustre/lustre/include/lustre_export.h
+++ b/drivers/staging/lustre/lustre/include/lustre_export.h
@@ -338,6 +338,13 @@ static inline bool imp_connect_disp_stripe(struct obd_import *imp)
struct obd_export *class_conn2export(struct lustre_handle *conn);
+#define KKUC_CT_DATA_MAGIC 0x092013cea
+struct kkuc_ct_data {
+ __u32 kcd_magic;
+ struct obd_uuid kcd_uuid;
+ __u32 kcd_archive;
+};
+
/** @} export */
#endif /* __EXPORT_H */
diff --git a/drivers/staging/lustre/lustre/libcfs/kernel_user_comm.c b/drivers/staging/lustre/lustre/libcfs/kernel_user_comm.c
index 1a052ac..3b4731a 100644
--- a/drivers/staging/lustre/lustre/libcfs/kernel_user_comm.c
+++ b/drivers/staging/lustre/lustre/libcfs/kernel_user_comm.c
@@ -95,10 +95,10 @@ EXPORT_SYMBOL(libcfs_kkuc_msg_put);
* group from any fs */
/** A single group registration has a uid and a file pointer */
struct kkuc_reg {
- struct list_head kr_chain;
- int kr_uid;
+ struct list_head kr_chain;
+ int kr_uid;
struct file *kr_fp;
- __u32 kr_data;
+ void *kr_data;
};
static struct list_head kkuc_groups[KUC_GRP_MAX+1] = {};
@@ -109,9 +109,10 @@ static DECLARE_RWSEM(kg_sem);
* @param filp pipe to write into
* @param uid identifier for this receiver
* @param group group number
+ * @param data user data
*/
int libcfs_kkuc_group_add(struct file *filp, int uid, unsigned int group,
- __u32 data)
+ void *data)
{
struct kkuc_reg *reg;
@@ -145,7 +146,7 @@ int libcfs_kkuc_group_add(struct file *filp, int uid, unsigned int group,
}
EXPORT_SYMBOL(libcfs_kkuc_group_add);
-int libcfs_kkuc_group_rem(int uid, int group)
+int libcfs_kkuc_group_rem(int uid, int group, void **pdata)
{
struct kkuc_reg *reg, *next;
@@ -171,6 +172,8 @@ int libcfs_kkuc_group_rem(int uid, int group)
reg->kr_uid, reg->kr_fp, group);
if (reg->kr_fp != NULL)
fput(reg->kr_fp);
+ if (pdata)
+ *pdata = reg->kr_data;
kfree(reg);
}
}
@@ -213,7 +216,7 @@ EXPORT_SYMBOL(libcfs_kkuc_group_put);
* Calls a callback function for each link of the given kuc group.
* @param group the group to call the function on.
* @param cb_func the function to be called.
- * @param cb_arg iextra argument to be passed to the callback function.
+ * @param cb_arg extra argument to be passed to the callback function.
*/
int libcfs_kkuc_group_foreach(int group, libcfs_kkuc_cb_t cb_func,
void *cb_arg)
diff --git a/drivers/staging/lustre/lustre/lmv/lmv_obd.c b/drivers/staging/lustre/lustre/lmv/lmv_obd.c
index bbafe0a..e2f181e 100644
--- a/drivers/staging/lustre/lustre/lmv/lmv_obd.c
+++ b/drivers/staging/lustre/lustre/lmv/lmv_obd.c
@@ -794,7 +794,9 @@ static void lmv_hsm_req_build(struct lmv_obd *lmv,
static int lmv_hsm_ct_unregister(struct lmv_obd *lmv, unsigned int cmd, int len,
struct lustre_kernelcomm *lk, void *uarg)
{
- int i, rc = 0;
+ struct kkuc_ct_data *kcd = NULL;
+ int rc = 0;
+ __u32 i;
/* unregister request (call from llapi_hsm_copytool_fini) */
for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
@@ -807,17 +809,21 @@ static int lmv_hsm_ct_unregister(struct lmv_obd *lmv, unsigned int cmd, int len,
* Unreached coordinators will get EPIPE on next requests
* and will unregister automatically.
*/
- rc = libcfs_kkuc_group_rem(lk->lk_uid, lk->lk_group);
+ rc = libcfs_kkuc_group_rem(lk->lk_uid, lk->lk_group, (void **)&kcd);
+ if (kcd)
+ kfree(kcd);
+
return rc;
}
static int lmv_hsm_ct_register(struct lmv_obd *lmv, unsigned int cmd, int len,
struct lustre_kernelcomm *lk, void *uarg)
{
- struct file *filp;
- int i, j, err;
- int rc = 0;
- bool any_set = false;
+ struct file *filp;
+ __u32 i, j;
+ int err, rc = 0;
+ bool any_set = false;
+ struct kkuc_ct_data *kcd;
/* All or nothing: try to register to all MDS.
* In case of failure, unregister from previous MDS,
@@ -854,12 +860,25 @@ static int lmv_hsm_ct_register(struct lmv_obd *lmv, unsigned int cmd, int len,
/* at least one registration done, with no failure */
filp = fget(lk->lk_wfd);
- if (filp == NULL) {
+ if (!filp)
return -EBADF;
- }
- rc = libcfs_kkuc_group_add(filp, lk->lk_uid, lk->lk_group, lk->lk_data);
- if (rc != 0 && filp != NULL)
+
+ kcd = kzalloc(sizeof(*kcd), GFP_NOFS);
+ if (!kcd) {
fput(filp);
+ return -ENOMEM;
+ }
+ kcd->kcd_magic = KKUC_CT_DATA_MAGIC;
+ kcd->kcd_uuid = lmv->cluuid;
+ kcd->kcd_archive = lk->lk_data;
+
+ rc = libcfs_kkuc_group_add(filp, lk->lk_uid, lk->lk_group, kcd);
+ if (rc) {
+ if (filp)
+ fput(filp);
+ kfree(kcd);
+ }
+
return rc;
}
diff --git a/drivers/staging/lustre/lustre/mdc/mdc_request.c b/drivers/staging/lustre/lustre/mdc/mdc_request.c
index 57e0fc1..1936b49 100644
--- a/drivers/staging/lustre/lustre/mdc/mdc_request.c
+++ b/drivers/staging/lustre/lustre/mdc/mdc_request.c
@@ -2013,21 +2013,27 @@ static int mdc_hsm_copytool_send(int len, void *val)
/**
* callback function passed to kuc for re-registering each HSM copytool
* running on MDC, after MDT shutdown/recovery.
- * @param data archive id served by the copytool
+ * @param data copytool registration data
* @param cb_arg callback argument (obd_import)
*/
-static int mdc_hsm_ct_reregister(__u32 data, void *cb_arg)
+static int mdc_hsm_ct_reregister(void *data, void *cb_arg)
{
+ struct kkuc_ct_data *kcd = data;
struct obd_import *imp = (struct obd_import *)cb_arg;
- __u32 archive = data;
int rc;
- CDEBUG(D_HA, "recover copytool registration to MDT (archive=%#x)\n",
- archive);
- rc = mdc_ioc_hsm_ct_register(imp, archive);
+ if (!kcd || kcd->kcd_magic != KKUC_CT_DATA_MAGIC)
+ return -EPROTO;
+
+ if (!obd_uuid_equals(&kcd->kcd_uuid, &imp->imp_obd->obd_uuid))
+ return 0;
+
+ CDEBUG(D_HA, "%s: recover copytool registration to MDT (archive=%#x)\n",
+ imp->imp_obd->obd_name, kcd->kcd_archive);
+ rc = mdc_ioc_hsm_ct_register(imp, kcd->kcd_archive);
/* ignore error if the copytool is already registered */
- return ((rc != 0) && (rc != -EEXIST)) ? rc : 0;
+ return (rc == -EEXIST) ? 0 : rc;
}
static int mdc_set_info_async(const struct lu_env *env,
@@ -2369,7 +2375,7 @@ static int mdc_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage)
case OBD_CLEANUP_EXPORTS:
/* Failsafe, ok if racy */
if (obd->obd_type->typ_refcnt <= 1)
- libcfs_kkuc_group_rem(0, KUC_GRP_HSM);
+ libcfs_kkuc_group_rem(0, KUC_GRP_HSM, NULL);
obd_cleanup_client_import(obd);
ptlrpc_lprocfs_unregister_obd(obd);
--
1.7.1
--
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