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Subject[PATCH 10/13] drbd: Allow to pass resource options to the new-resource command
Date
From: Andreas Gruenbacher <agruen@linbit.com>

This is equivalent to how the attach and connect commands work.

Signed-off-by: Philipp Reisner <philipp.reisner@linbit.com>
Signed-off-by: Lars Ellenberg <lars.ellenberg@linbit.com>
---
drivers/block/drbd/drbd_int.h | 4 +-
drivers/block/drbd/drbd_main.c | 46 +++++++++++++++++++++++++++++++++--
drivers/block/drbd/drbd_nl.c | 51 ++++++++++++---------------------------
3 files changed, 61 insertions(+), 40 deletions(-)

diff --git a/drivers/block/drbd/drbd_int.h b/drivers/block/drbd/drbd_int.h
index 6d6d105..ece2e4a 100644
--- a/drivers/block/drbd/drbd_int.h
+++ b/drivers/block/drbd/drbd_int.h
@@ -1379,7 +1379,8 @@ extern int conn_lowest_minor(struct drbd_tconn *tconn);
enum drbd_ret_code conn_new_minor(struct drbd_tconn *tconn, unsigned int minor, int vnr);
extern void drbd_minor_destroy(struct kref *kref);

-struct drbd_tconn *conn_create(const char *name);
+extern int set_resource_options(struct drbd_tconn *tconn, struct res_opts *res_opts);
+extern struct drbd_tconn *conn_create(const char *name, struct res_opts *res_opts);
extern void conn_destroy(struct kref *kref);
struct drbd_tconn *conn_get_by_name(const char *name);
extern struct drbd_tconn *conn_get_by_addrs(void *my_addr, int my_addr_len,
@@ -1397,7 +1398,6 @@ extern int is_valid_ar_handle(struct drbd_request *, sector_t);


/* drbd_nl.c */
-extern void drbd_set_res_opts_defaults(struct res_opts *r);
extern int drbd_msg_put_info(const char *info);
extern void drbd_suspend_io(struct drbd_conf *mdev);
extern void drbd_resume_io(struct drbd_conf *mdev);
diff --git a/drivers/block/drbd/drbd_main.c b/drivers/block/drbd/drbd_main.c
index bfcd1dc..a67b4ca 100644
--- a/drivers/block/drbd/drbd_main.c
+++ b/drivers/block/drbd/drbd_main.c
@@ -2479,8 +2479,47 @@ void conn_free_crypto(struct drbd_tconn *tconn)
tconn->int_dig_vv = NULL;
}

+int set_resource_options(struct drbd_tconn *tconn, struct res_opts *res_opts)
+{
+ cpumask_var_t new_cpu_mask;
+ int err;
+
+ if (!zalloc_cpumask_var(&new_cpu_mask, GFP_KERNEL))
+ return -ENOMEM;
+ /*
+ retcode = ERR_NOMEM;
+ drbd_msg_put_info("unable to allocate cpumask");
+ */
+
+ /* silently ignore cpu mask on UP kernel */
+ if (nr_cpu_ids > 1 && res_opts->cpu_mask[0] != 0) {
+ /* FIXME: Get rid of constant 32 here */
+ err = __bitmap_parse(res_opts->cpu_mask, 32, 0,
+ cpumask_bits(new_cpu_mask), nr_cpu_ids);
+ if (err) {
+ conn_warn(tconn, "__bitmap_parse() failed with %d\n", err);
+ /* retcode = ERR_CPU_MASK_PARSE; */
+ goto fail;
+ }
+ }
+ tconn->res_opts = *res_opts;
+ if (!cpumask_equal(tconn->cpu_mask, new_cpu_mask)) {
+ cpumask_copy(tconn->cpu_mask, new_cpu_mask);
+ drbd_calc_cpu_mask(tconn);
+ tconn->receiver.reset_cpu_mask = 1;
+ tconn->asender.reset_cpu_mask = 1;
+ tconn->worker.reset_cpu_mask = 1;
+ }
+ err = 0;
+
+fail:
+ free_cpumask_var(new_cpu_mask);
+ return err;
+
+}
+
/* caller must be under genl_lock() */
-struct drbd_tconn *conn_create(const char *name)
+struct drbd_tconn *conn_create(const char *name, struct res_opts *res_opts)
{
struct drbd_tconn *tconn;

@@ -2500,6 +2539,9 @@ struct drbd_tconn *conn_create(const char *name)
if (!zalloc_cpumask_var(&tconn->cpu_mask, GFP_KERNEL))
goto fail;

+ if (set_resource_options(tconn, res_opts))
+ goto fail;
+
if (!tl_init(tconn))
goto fail;

@@ -2520,8 +2562,6 @@ struct drbd_tconn *conn_create(const char *name)
drbd_thread_init(tconn, &tconn->worker, drbd_worker, "worker");
drbd_thread_init(tconn, &tconn->asender, drbd_asender, "asender");

- drbd_set_res_opts_defaults(&tconn->res_opts);
-
kref_init(&tconn->kref);
list_add_tail_rcu(&tconn->all_tconn, &drbd_tconns);

diff --git a/drivers/block/drbd/drbd_nl.c b/drivers/block/drbd/drbd_nl.c
index 50f0980..d361a07 100644
--- a/drivers/block/drbd/drbd_nl.c
+++ b/drivers/block/drbd/drbd_nl.c
@@ -2383,15 +2383,9 @@ int drbd_adm_resize(struct sk_buff *skb, struct genl_info *info)
return 0;
}

-void drbd_set_res_opts_defaults(struct res_opts *r)
-{
- return set_res_opts_defaults(r);
-}
-
int drbd_adm_resource_opts(struct sk_buff *skb, struct genl_info *info)
{
enum drbd_ret_code retcode;
- cpumask_var_t new_cpu_mask;
struct drbd_tconn *tconn;
struct res_opts res_opts;
int err;
@@ -2403,12 +2397,6 @@ int drbd_adm_resource_opts(struct sk_buff *skb, struct genl_info *info)
goto fail;
tconn = adm_ctx.tconn;

- if (!zalloc_cpumask_var(&new_cpu_mask, GFP_KERNEL)) {
- retcode = ERR_NOMEM;
- drbd_msg_put_info("unable to allocate cpumask");
- goto fail;
- }
-
res_opts = tconn->res_opts;
if (should_set_defaults(info))
set_res_opts_defaults(&res_opts);
@@ -2420,31 +2408,14 @@ int drbd_adm_resource_opts(struct sk_buff *skb, struct genl_info *info)
goto fail;
}

- /* silently ignore cpu mask on UP kernel */
- if (nr_cpu_ids > 1 && res_opts.cpu_mask[0] != 0) {
- err = __bitmap_parse(res_opts.cpu_mask, 32, 0,
- cpumask_bits(new_cpu_mask), nr_cpu_ids);
- if (err) {
- conn_warn(tconn, "__bitmap_parse() failed with %d\n", err);
- retcode = ERR_CPU_MASK_PARSE;
- goto fail;
- }
- }
-
-
- tconn->res_opts = res_opts;
-
- if (!cpumask_equal(tconn->cpu_mask, new_cpu_mask)) {
- cpumask_copy(tconn->cpu_mask, new_cpu_mask);
- drbd_calc_cpu_mask(tconn);
- tconn->receiver.reset_cpu_mask = 1;
- tconn->asender.reset_cpu_mask = 1;
- tconn->worker.reset_cpu_mask = 1;
+ err = set_resource_options(tconn, &res_opts);
+ if (err) {
+ retcode = ERR_INVALID_REQUEST;
+ if (err == -ENOMEM)
+ retcode = ERR_NOMEM;
}

fail:
- free_cpumask_var(new_cpu_mask);
-
drbd_adm_finish(info, retcode);
return 0;
}
@@ -3056,6 +3027,8 @@ drbd_check_resource_name(const char *name)
int drbd_adm_new_resource(struct sk_buff *skb, struct genl_info *info)
{
enum drbd_ret_code retcode;
+ struct res_opts res_opts;
+ int err;

retcode = drbd_adm_prepare(skb, info, 0);
if (!adm_ctx.reply_skb)
@@ -3063,6 +3036,14 @@ int drbd_adm_new_resource(struct sk_buff *skb, struct genl_info *info)
if (retcode != NO_ERROR)
goto out;

+ set_res_opts_defaults(&res_opts);
+ err = res_opts_from_attrs(&res_opts, info);
+ if (err && err != -ENOMSG) {
+ retcode = ERR_MANDATORY_TAG;
+ drbd_msg_put_info(from_attrs_err_to_txt(err));
+ goto out;
+ }
+
retcode = drbd_check_resource_name(adm_ctx.resource_name);
if (retcode != NO_ERROR)
goto out;
@@ -3076,7 +3057,7 @@ int drbd_adm_new_resource(struct sk_buff *skb, struct genl_info *info)
goto out;
}

- if (!conn_create(adm_ctx.resource_name))
+ if (!conn_create(adm_ctx.resource_name, &res_opts))
retcode = ERR_NOMEM;
out:
drbd_adm_finish(info, retcode);
--
1.7.4.1


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