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Subject[PATCH 06/20] staging: lustre: lmv: assume a real connection in lmv_connect()
Date
From: "John L. Hammond" <john.hammond@intel.com>

Assume a real connection in lmv_connect(). Mark OBD_CONNECT_REAL
obsolete. Remove the then unnecessary refcount and exp members of
struct lmv_obd. Remove calls to lmv_check_connect(). Disconnect the
export in the appropriate error path of lmv_connect().

Signed-off-by: John L. Hammond <john.hammond@intel.com>
Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-7669
Reviewed-on: http://review.whamcloud.com/18018
Reviewed-by: Andreas Dilger <andreas.dilger@intel.com>
Reviewed-by: wangdi <di.wang@intel.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
---
.../lustre/lustre/include/lustre/lustre_idl.h | 2 +-
drivers/staging/lustre/lustre/include/obd.h | 2 -
drivers/staging/lustre/lustre/llite/llite_lib.c | 3 -
drivers/staging/lustre/lustre/lmv/lmv_intent.c | 5 -
drivers/staging/lustre/lustre/lmv/lmv_internal.h | 2 -
drivers/staging/lustre/lustre/lmv/lmv_obd.c | 161 +++------------------
6 files changed, 23 insertions(+), 152 deletions(-)

diff --git a/drivers/staging/lustre/lustre/include/lustre/lustre_idl.h b/drivers/staging/lustre/lustre/include/lustre/lustre_idl.h
index 77995fa..441a2e3 100644
--- a/drivers/staging/lustre/lustre/include/lustre/lustre_idl.h
+++ b/drivers/staging/lustre/lustre/include/lustre/lustre_idl.h
@@ -1122,7 +1122,7 @@ struct ptlrpc_body_v2 {
#define OBD_CONNECT_AT 0x1000000ULL /*client uses AT */
#define OBD_CONNECT_LRU_RESIZE 0x2000000ULL /*LRU resize feature. */
#define OBD_CONNECT_MDS_MDS 0x4000000ULL /*MDS-MDS connection */
-#define OBD_CONNECT_REAL 0x8000000ULL /*real connection */
+#define OBD_CONNECT_REAL 0x8000000ULL /* obsolete since 2.8 */
#define OBD_CONNECT_CHANGE_QS 0x10000000ULL /*Not used since 2.4 */
#define OBD_CONNECT_CKSUM 0x20000000ULL /*support several cksum algos*/
#define OBD_CONNECT_FID 0x40000000ULL /*FID is supported by server */
diff --git a/drivers/staging/lustre/lustre/include/obd.h b/drivers/staging/lustre/lustre/include/obd.h
index 4ce8506..4dfc31e 100644
--- a/drivers/staging/lustre/lustre/include/obd.h
+++ b/drivers/staging/lustre/lustre/include/obd.h
@@ -404,12 +404,10 @@ struct lmv_tgt_desc {
};

struct lmv_obd {
- int refcount;
struct lu_client_fld lmv_fld;
spinlock_t lmv_lock;
struct lmv_desc desc;
struct obd_uuid cluuid;
- struct obd_export *exp;

struct mutex lmv_init_mutex;
int connected;
diff --git a/drivers/staging/lustre/lustre/llite/llite_lib.c b/drivers/staging/lustre/lustre/llite/llite_lib.c
index 974a05d..69d895d 100644
--- a/drivers/staging/lustre/lustre/llite/llite_lib.c
+++ b/drivers/staging/lustre/lustre/llite/llite_lib.c
@@ -222,9 +222,6 @@ static int client_common_fill_super(struct super_block *sb, char *md, char *dt,
else
sbi->ll_fop = &ll_file_operations_noflock;

- /* real client */
- data->ocd_connect_flags |= OBD_CONNECT_REAL;
-
/* always ping even if server suppress_pings */
if (sbi->ll_flags & LL_SBI_ALWAYS_PING)
data->ocd_connect_flags &= ~OBD_CONNECT_PINGLESS;
diff --git a/drivers/staging/lustre/lustre/lmv/lmv_intent.c b/drivers/staging/lustre/lustre/lmv/lmv_intent.c
index f49db6c..5f01a0c 100644
--- a/drivers/staging/lustre/lustre/lmv/lmv_intent.c
+++ b/drivers/staging/lustre/lustre/lmv/lmv_intent.c
@@ -474,7 +474,6 @@ int lmv_intent_lock(struct obd_export *exp, struct md_op_data *op_data,
ldlm_blocking_callback cb_blocking,
__u64 extra_lock_flags)
{
- struct obd_device *obd = exp->exp_obd;
int rc;

LASSERT(fid_is_sane(&op_data->op_fid1));
@@ -484,10 +483,6 @@ int lmv_intent_lock(struct obd_export *exp, struct md_op_data *op_data,
(int)op_data->op_namelen, op_data->op_name,
PFID(&op_data->op_fid1));

- rc = lmv_check_connect(obd);
- if (rc)
- return rc;
-
if (it->it_op & (IT_LOOKUP | IT_GETATTR | IT_LAYOUT))
rc = lmv_intent_lookup(exp, op_data, it, reqp, cb_blocking,
extra_lock_flags);
diff --git a/drivers/staging/lustre/lustre/lmv/lmv_internal.h b/drivers/staging/lustre/lustre/lmv/lmv_internal.h
index 12731a17..e839b83 100644
--- a/drivers/staging/lustre/lustre/lmv/lmv_internal.h
+++ b/drivers/staging/lustre/lustre/lmv/lmv_internal.h
@@ -42,8 +42,6 @@
#define LL_IT2STR(it) \
((it) ? ldlm_it2str((it)->it_op) : "0")

-int lmv_check_connect(struct obd_device *obd);
-
int lmv_intent_lock(struct obd_export *exp, struct md_op_data *op_data,
struct lookup_intent *it, struct ptlrpc_request **reqp,
ldlm_blocking_callback cb_blocking,
diff --git a/drivers/staging/lustre/lustre/lmv/lmv_obd.c b/drivers/staging/lustre/lustre/lmv/lmv_obd.c
index 64fcaef..1c9ff24 100644
--- a/drivers/staging/lustre/lustre/lmv/lmv_obd.c
+++ b/drivers/staging/lustre/lustre/lmv/lmv_obd.c
@@ -53,6 +53,8 @@
#include "../include/lustre_kernelcomm.h"
#include "lmv_internal.h"

+static int lmv_check_connect(struct obd_device *obd);
+
static void lmv_activate_target(struct lmv_obd *lmv,
struct lmv_tgt_desc *tgt,
int activate)
@@ -183,59 +185,44 @@ static int lmv_notify(struct obd_device *obd, struct obd_device *watched,
return rc;
}

-/**
- * This is fake connect function. Its purpose is to initialize lmv and say
- * caller that everything is okay. Real connection will be performed later.
- */
static int lmv_connect(const struct lu_env *env,
- struct obd_export **exp, struct obd_device *obd,
+ struct obd_export **pexp, struct obd_device *obd,
struct obd_uuid *cluuid, struct obd_connect_data *data,
void *localdata)
{
struct lmv_obd *lmv = &obd->u.lmv;
struct lustre_handle conn = { 0 };
+ struct obd_export *exp;
int rc = 0;

- /*
- * We don't want to actually do the underlying connections more than
- * once, so keep track.
- */
- lmv->refcount++;
- if (lmv->refcount > 1) {
- *exp = NULL;
- return 0;
- }
-
rc = class_connect(&conn, obd, cluuid);
if (rc) {
CERROR("class_connection() returned %d\n", rc);
return rc;
}

- *exp = class_conn2export(&conn);
- class_export_get(*exp);
+ exp = class_conn2export(&conn);

- lmv->exp = *exp;
lmv->connected = 0;
lmv->cluuid = *cluuid;
-
- if (data)
- lmv->conn_data = *data;
+ lmv->conn_data = *data;

lmv->lmv_tgts_kobj = kobject_create_and_add("target_obds",
&obd->obd_kobj);
- /*
- * All real clients should perform actual connection right away, because
- * it is possible, that LMV will not have opportunity to connect targets
- * and MDC stuff will be called directly, for instance while reading
- * ../mdc/../kbytesfree procfs file, etc.
- */
- if (data && data->ocd_connect_flags & OBD_CONNECT_REAL)
- rc = lmv_check_connect(obd);
+ rc = lmv_check_connect(obd);
+ if (rc)
+ goto out_sysfs;
+
+ *pexp = exp;

- if (rc && lmv->lmv_tgts_kobj)
+ return rc;
+
+out_sysfs:
+ if (lmv->lmv_tgts_kobj)
kobject_put(lmv->lmv_tgts_kobj);

+ class_disconnect(exp);
+
return rc;
}

@@ -475,7 +462,7 @@ static int lmv_add_target(struct obd_device *obd, struct obd_uuid *uuidp,
return rc;
}

-int lmv_check_connect(struct obd_device *obd)
+static int lmv_check_connect(struct obd_device *obd)
{
struct lmv_obd *lmv = &obd->u.lmv;
struct lmv_tgt_desc *tgt;
@@ -519,7 +506,6 @@ int lmv_check_connect(struct obd_device *obd)
goto out_disc;
}

- class_export_put(lmv->exp);
lmv->connected = 1;
easize = lmv_mds_md_size(lmv->desc.ld_tgt_count, LMV_MAGIC);
lmv_init_ea_size(obd->obd_self_export, easize, 0);
@@ -543,7 +529,7 @@ int lmv_check_connect(struct obd_device *obd)
}
}
}
- class_disconnect(lmv->exp);
+
mutex_unlock(&lmv->lmv_init_mutex);
return rc;
}
@@ -598,13 +584,6 @@ static int lmv_disconnect(struct obd_export *exp)
if (!lmv->tgts)
goto out_local;

- /*
- * Only disconnect the underlying layers on the final disconnect.
- */
- lmv->refcount--;
- if (lmv->refcount != 0)
- goto out_local;
-
for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
if (!lmv->tgts[i] || !lmv->tgts[i]->ltd_exp)
continue;
@@ -623,8 +602,7 @@ static int lmv_disconnect(struct obd_export *exp)
if (!lmv->connected)
class_export_put(exp);
rc = class_disconnect(exp);
- if (lmv->refcount == 0)
- lmv->connected = 0;
+ lmv->connected = 0;
return rc;
}

@@ -1122,7 +1100,8 @@ static int lmv_iocontrol(unsigned int cmd, struct obd_export *exp,
err = obd_iocontrol(cmd, tgt->ltd_exp, len, karg, uarg);
if (err) {
if (tgt->ltd_active) {
- CERROR("error: iocontrol MDC %s on MDTidx %d cmd %x: err = %d\n",
+ CERROR("%s: error: iocontrol MDC %s on MDTidx %d cmd %x: err = %d\n",
+ lmv2obd_dev(lmv)->obd_name,
tgt->ltd_uuid.uuid, i, cmd, err);
if (!rc)
rc = err;
@@ -1368,10 +1347,6 @@ static int lmv_statfs(const struct lu_env *env, struct obd_export *exp,
int rc = 0;
u32 i;

- rc = lmv_check_connect(obd);
- if (rc)
- return rc;
-
temp = kzalloc(sizeof(*temp), GFP_NOFS);
if (!temp)
return -ENOMEM;
@@ -1418,11 +1393,6 @@ static int lmv_getstatus(struct obd_export *exp,
{
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
- int rc;
-
- rc = lmv_check_connect(obd);
- if (rc)
- return rc;

return md_getstatus(lmv->tgts[0]->ltd_exp, fid);
}
@@ -1435,11 +1405,6 @@ static int lmv_getxattr(struct obd_export *exp, const struct lu_fid *fid,
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
struct lmv_tgt_desc *tgt;
- int rc;
-
- rc = lmv_check_connect(obd);
- if (rc)
- return rc;

tgt = lmv_find_target(lmv, fid);
if (IS_ERR(tgt))
@@ -1458,11 +1423,6 @@ static int lmv_setxattr(struct obd_export *exp, const struct lu_fid *fid,
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
struct lmv_tgt_desc *tgt;
- int rc;
-
- rc = lmv_check_connect(obd);
- if (rc)
- return rc;

tgt = lmv_find_target(lmv, fid);
if (IS_ERR(tgt))
@@ -1479,11 +1439,6 @@ static int lmv_getattr(struct obd_export *exp, struct md_op_data *op_data,
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
struct lmv_tgt_desc *tgt;
- int rc;
-
- rc = lmv_check_connect(obd);
- if (rc)
- return rc;

tgt = lmv_find_target(lmv, &op_data->op_fid1);
if (IS_ERR(tgt))
@@ -1502,11 +1457,6 @@ static int lmv_null_inode(struct obd_export *exp, const struct lu_fid *fid)
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
u32 i;
- int rc;
-
- rc = lmv_check_connect(obd);
- if (rc)
- return rc;

CDEBUG(D_INODE, "CBDATA for " DFID "\n", PFID(fid));

@@ -1530,11 +1480,6 @@ static int lmv_close(struct obd_export *exp, struct md_op_data *op_data,
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
struct lmv_tgt_desc *tgt;
- int rc;
-
- rc = lmv_check_connect(obd);
- if (rc)
- return rc;

tgt = lmv_find_target(lmv, &op_data->op_fid1);
if (IS_ERR(tgt))
@@ -1661,10 +1606,6 @@ static int lmv_create(struct obd_export *exp, struct md_op_data *op_data,
struct lmv_tgt_desc *tgt;
int rc;

- rc = lmv_check_connect(obd);
- if (rc)
- return rc;
-
if (!lmv->desc.ld_active_tgt_count)
return -EIO;

@@ -1718,11 +1659,6 @@ static int lmv_create(struct obd_export *exp, struct md_op_data *op_data,
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
struct lmv_tgt_desc *tgt;
- int rc;
-
- rc = lmv_check_connect(obd);
- if (rc)
- return rc;

CDEBUG(D_INODE, "ENQUEUE '%s' on " DFID "\n",
LL_IT2STR(it), PFID(&op_data->op_fid1));
@@ -1749,10 +1685,6 @@ static int lmv_create(struct obd_export *exp, struct md_op_data *op_data,
struct mdt_body *body;
int rc;

- rc = lmv_check_connect(obd);
- if (rc)
- return rc;
-
tgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
if (IS_ERR(tgt))
return PTR_ERR(tgt);
@@ -1845,10 +1777,6 @@ static int lmv_link(struct obd_export *exp, struct md_op_data *op_data,
struct lmv_tgt_desc *tgt;
int rc;

- rc = lmv_check_connect(obd);
- if (rc)
- return rc;
-
LASSERT(op_data->op_namelen != 0);

CDEBUG(D_INODE, "LINK " DFID ":%*s to " DFID "\n",
@@ -1907,10 +1835,6 @@ static int lmv_rename(struct obd_export *exp, struct md_op_data *op_data,
(int)newlen, new, PFID(&op_data->op_fid2),
op_data->op_mea2 ? op_data->op_mea2->lsm_md_stripe_count : 0);

- rc = lmv_check_connect(obd);
- if (rc)
- return rc;
-
op_data->op_fsuid = from_kuid(&init_user_ns, current_fsuid());
op_data->op_fsgid = from_kgid(&init_user_ns, current_fsgid());
op_data->op_cap = cfs_curproc_cap_pack();
@@ -2063,11 +1987,6 @@ static int lmv_setattr(struct obd_export *exp, struct md_op_data *op_data,
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
struct lmv_tgt_desc *tgt;
- int rc;
-
- rc = lmv_check_connect(obd);
- if (rc)
- return rc;

CDEBUG(D_INODE, "SETATTR for " DFID ", valid 0x%x\n",
PFID(&op_data->op_fid1), op_data->op_attr.ia_valid);
@@ -2086,11 +2005,6 @@ static int lmv_sync(struct obd_export *exp, const struct lu_fid *fid,
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
struct lmv_tgt_desc *tgt;
- int rc;
-
- rc = lmv_check_connect(obd);
- if (rc)
- return rc;

tgt = lmv_find_target(lmv, fid);
if (IS_ERR(tgt))
@@ -2272,7 +2186,6 @@ static int lmv_read_striped_page(struct obd_export *exp,
{
struct inode *master_inode = op_data->op_data;
struct lu_fid master_fid = op_data->op_fid1;
- struct obd_device *obd = exp->exp_obd;
__u64 hash_offset = offset;
__u32 ldp_flags;
struct page *min_ent_page = NULL;
@@ -2286,10 +2199,6 @@ static int lmv_read_striped_page(struct obd_export *exp,
void *area;
int rc;

- rc = lmv_check_connect(obd);
- if (rc)
- return rc;
-
/*
* Allocate a page and read entries from all of stripes and fill
* the page by hash order
@@ -2408,11 +2317,6 @@ static int lmv_read_page(struct obd_export *exp, struct md_op_data *op_data,
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
struct lmv_tgt_desc *tgt;
- int rc;
-
- rc = lmv_check_connect(obd);
- if (rc)
- return rc;

if (unlikely(lsm))
return lmv_read_striped_page(exp, op_data, cb_op, offset, ppage);
@@ -2460,9 +2364,6 @@ static int lmv_unlink(struct obd_export *exp, struct md_op_data *op_data,
int stripe_index = 0;
int rc;

- rc = lmv_check_connect(obd);
- if (rc)
- return rc;
retry_unlink:
/* For striped dir, we need to locate the parent as well */
if (lsm) {
@@ -2647,10 +2548,6 @@ static int lmv_get_info(const struct lu_env *env, struct obd_export *exp,
if (keylen >= strlen("remote_flag") && !strcmp(key, "remote_flag")) {
int i;

- rc = lmv_check_connect(obd);
- if (rc)
- return rc;
-
LASSERT(*vallen == sizeof(__u32));
for (i = 0; i < lmv->desc.ld_tgt_count; i++) {
struct lmv_tgt_desc *tgt = lmv->tgts[i];
@@ -2669,10 +2566,6 @@ static int lmv_get_info(const struct lu_env *env, struct obd_export *exp,
} else if (KEY_IS(KEY_MAX_EASIZE) ||
KEY_IS(KEY_DEFAULT_EASIZE) ||
KEY_IS(KEY_CONN_DATA)) {
- rc = lmv_check_connect(obd);
- if (rc)
- return rc;
-
/*
* Forwarding this request to first MDS, it should know LOV
* desc.
@@ -3021,15 +2914,10 @@ static int lmv_intent_getattr_async(struct obd_export *exp,
struct lmv_obd *lmv = &obd->u.lmv;
struct lmv_tgt_desc *ptgt = NULL;
struct lmv_tgt_desc *ctgt = NULL;
- int rc;

if (!fid_is_sane(&op_data->op_fid2))
return -EINVAL;

- rc = lmv_check_connect(obd);
- if (rc)
- return rc;
-
ptgt = lmv_locate_mds(lmv, op_data, &op_data->op_fid1);
if (IS_ERR(ptgt))
return PTR_ERR(ptgt);
@@ -3056,11 +2944,6 @@ static int lmv_revalidate_lock(struct obd_export *exp, struct lookup_intent *it,
struct obd_device *obd = exp->exp_obd;
struct lmv_obd *lmv = &obd->u.lmv;
struct lmv_tgt_desc *tgt;
- int rc;
-
- rc = lmv_check_connect(obd);
- if (rc)
- return rc;

tgt = lmv_find_target(lmv, fid);
if (IS_ERR(tgt))
--
1.8.3.1
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