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Date: Wed, 11 Dec 2019 17:45:36 +0200 From: Tariq Toukan <tariqt@...lanox.com> To: David Ahern <dsahern@...il.com>, Stephen Hemminger <stephen@...workplumber.org> Cc: netdev@...r.kernel.org, ayal@...lanox.com, moshe@...lanox.com, jiri@...lanox.com, Tariq Toukan <tariqt@...lanox.com> Subject: [PATCH iproute2 3/3] devlink: Fix fmsg nesting in non JSON output From: Aya Levin <ayal@...lanox.com> When an object or an array opening follows a name (label), add a new line and indentation before printing the label. When name (label) is followed by a value, print both at the same line. Prior to this patch nesting was not visible in a non JSON output: JSON: { "Common config": { "SQ": { "stride size": 64, "size": 1024 }, "CQ": { "stride size": 64, "size": 1024 } }, "SQs": [ { "channel ix": 0, "sqn": 10, "HW state": 1, "stopped": false, "cc": 0, "pc": 0, "CQ": { "cqn": 6, "HW status": 0 } },{ "channel ix": 0, "sqn": 14, "HW state": 1, "stopped": false, "cc": 0, "pc": 0, "CQ": { "cqn": 10, "HW status": 0 } } ] } Before this patch: Common Config: SQ: stride size: 64 size: 1024 CQ: stride size: 64 size: 1024 SQs: channel ix: 0 tc: 0 txq ix: 0 sqn: 10 HW state: 1 stopped: false cc: 0 pc: 0 CQ: cqn: 6 HW status: 0 channel ix: 1 tc: 0 txq ix: 1 sqn: 14 HW state: 1 stopped: false cc: 0 pc: 0 CQ: cqn: 10 HW status: 0 With this patch: Common config: SQ: stride size: 64 size: 1024 CQ: stride size: 64 size: 1024 SQs: channel ix: 0 sqn: 10 HW state: 1 stopped: false cc: 0 pc: 0 CQ: cqn: 6 HW status: 0 channel ix: 1 sqn: 14 HW state: 1 stopped: false cc: 0 pc: 0 CQ: cqn: 10 HW status: 0 Fixes: 7b8baf834d5e ("devlink: Add devlink health diagnose command") Signed-off-by: Aya Levin <ayal@...lanox.com> Acked-by: Jiri Pirko <jiri@...lanox.com> Signed-off-by: Tariq Toukan <tariqt@...lanox.com> --- devlink/devlink.c | 106 ++++++++++++++++++++++++++++++++++++++-------- 1 file changed, 88 insertions(+), 18 deletions(-) diff --git a/devlink/devlink.c b/devlink/devlink.c index f0181e41faa4..95f05a0b5223 100644 --- a/devlink/devlink.c +++ b/devlink/devlink.c @@ -6463,12 +6463,23 @@ static int fmsg_value_show(struct dl *dl, int type, struct nlattr *nl_data) return MNL_CB_OK; } +static void pr_out_fmsg_name(struct dl *dl, char **name) +{ + if (!*name) + return; + + pr_out_name(dl, *name); + free(*name); + *name = NULL; +} + struct nest_entry { int attr_type; struct list_head list; }; struct fmsg_cb_data { + char *name; struct dl *dl; uint8_t value_type; struct list_head entry_list; @@ -6498,6 +6509,56 @@ static int cmd_fmsg_nest_queue(struct fmsg_cb_data *fmsg_data, return MNL_CB_OK; } +static void pr_out_fmsg_group_start(struct dl *dl, char **name) +{ + __pr_out_newline(); + pr_out_fmsg_name(dl, name); + __pr_out_newline(); + __pr_out_indent_inc(); +} + +static void pr_out_fmsg_group_end(struct dl *dl) +{ + __pr_out_newline(); + __pr_out_indent_dec(); +} + +static void pr_out_fmsg_start_object(struct dl *dl, char **name) +{ + if (dl->json_output) { + pr_out_fmsg_name(dl, name); + jsonw_start_object(dl->jw); + } else { + pr_out_fmsg_group_start(dl, name); + } +} + +static void pr_out_fmsg_end_object(struct dl *dl) +{ + if (dl->json_output) + jsonw_end_object(dl->jw); + else + pr_out_fmsg_group_end(dl); +} + +static void pr_out_fmsg_start_array(struct dl *dl, char **name) +{ + if (dl->json_output) { + pr_out_fmsg_name(dl, name); + jsonw_start_array(dl->jw); + } else { + pr_out_fmsg_group_start(dl, name); + } +} + +static void pr_out_fmsg_end_array(struct dl *dl) +{ + if (dl->json_output) + jsonw_end_array(dl->jw); + else + pr_out_fmsg_group_end(dl); +} + static int cmd_fmsg_nest(struct fmsg_cb_data *fmsg_data, uint8_t nest_value, bool start) { @@ -6512,26 +6573,17 @@ static int cmd_fmsg_nest(struct fmsg_cb_data *fmsg_data, uint8_t nest_value, switch (value) { case DEVLINK_ATTR_FMSG_OBJ_NEST_START: if (start) - pr_out_entry_start(dl); + pr_out_fmsg_start_object(dl, &fmsg_data->name); else - pr_out_entry_end(dl); + pr_out_fmsg_end_object(dl); break; case DEVLINK_ATTR_FMSG_PAIR_NEST_START: break; case DEVLINK_ATTR_FMSG_ARR_NEST_START: - if (dl->json_output) { - if (start) - jsonw_start_array(dl->jw); - else - jsonw_end_array(dl->jw); - } else { - if (start) { - __pr_out_newline(); - __pr_out_indent_inc(); - } else { - __pr_out_indent_dec(); - } - } + if (start) + pr_out_fmsg_start_array(dl, &fmsg_data->name); + else + pr_out_fmsg_end_array(dl); break; default: return -EINVAL; @@ -6569,12 +6621,16 @@ static int cmd_fmsg_object_cb(const struct nlmsghdr *nlh, void *data) return err; break; case DEVLINK_ATTR_FMSG_OBJ_NAME: - pr_out_name(dl, mnl_attr_get_str(nla_object)); + free(fmsg_data->name); + fmsg_data->name = strdup(mnl_attr_get_str(nla_object)); + if (!fmsg_data->name) + return -ENOMEM; break; case DEVLINK_ATTR_FMSG_OBJ_VALUE_TYPE: fmsg_data->value_type = mnl_attr_get_u8(nla_object); break; case DEVLINK_ATTR_FMSG_OBJ_VALUE_DATA: + pr_out_fmsg_name(dl, &fmsg_data->name); err = fmsg_value_show(dl, fmsg_data->value_type, nla_object); if (err != MNL_CB_OK) @@ -6587,6 +6643,20 @@ static int cmd_fmsg_object_cb(const struct nlmsghdr *nlh, void *data) return MNL_CB_OK; } +static void cmd_fmsg_init(struct dl *dl, struct fmsg_cb_data *data) +{ + /* FMSG is dynamic: opening of an object or array causes a + * newline. JSON starts with an { or [, but plain text should + * not start with a new line. Ensure this by setting + * g_new_line_count to 1: avoiding newline before the first + * print. + */ + g_new_line_count = 1; + data->name = NULL; + data->dl = dl; + INIT_LIST_HEAD(&data->entry_list); +} + static int cmd_health_object_common(struct dl *dl, uint8_t cmd, uint16_t flags) { struct fmsg_cb_data data; @@ -6600,9 +6670,9 @@ static int cmd_health_object_common(struct dl *dl, uint8_t cmd, uint16_t flags) if (err) return err; - data.dl = dl; - INIT_LIST_HEAD(&data.entry_list); + cmd_fmsg_init(dl, &data); err = _mnlg_socket_sndrcv(dl->nlg, nlh, cmd_fmsg_object_cb, &data); + free(data.name); return err; } -- 2.21.0
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