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| author | David Ahern <dsahern@gmail.com> | 2018-06-05 08:14:10 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2018-06-05 12:32:37 -0400 |
| commit | 7fa76d777ec53eeece1546b737a3b93b37639575 (patch) | |
| tree | 4c108bec37b7bd234b5e1a33e7efc9c7d74b2c33 /drivers/net/netdevsim | |
| parent | ac0fc8a1bbcbe03ee67278afded105c05eb3535e (diff) | |
| download | blackbird-obmc-linux-7fa76d777ec53eeece1546b737a3b93b37639575.tar.gz blackbird-obmc-linux-7fa76d777ec53eeece1546b737a3b93b37639575.zip | |
netdevsim: Add extack error message for devlink reload
devlink reset command can fail if a FIB resource limit is set to a value
lower than the current occupancy. Return a proper message indicating the
reason for the failure.
$ devlink resource sh netdevsim/netdevsim0
netdevsim/netdevsim0:
name IPv4 size unlimited unit entry size_min 0 size_max unlimited size_gran 1 dpipe_tables none
resources:
name fib size unlimited occ 43 unit entry size_min 0 size_max unlimited size_gran 1 dpipe_tables none
name fib-rules size unlimited occ 4 unit entry size_min 0 size_max unlimited size_gran 1 dpipe_tables none
name IPv6 size unlimited unit entry size_min 0 size_max unlimited size_gran 1 dpipe_tables none
resources:
name fib size unlimited occ 54 unit entry size_min 0 size_max unlimited size_gran 1 dpipe_tables none
name fib-rules size unlimited occ 3 unit entry size_min 0 size_max unlimited size_gran 1 dpipe_tables none
$ devlink resource set netdevsim/netdevsim0 path /IPv4/fib size 40
$ devlink dev reload netdevsim/netdevsim0
Error: netdevsim: New size is less than current occupancy.
devlink answers: Invalid argument
Signed-off-by: David Ahern <dsahern@gmail.com>
Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'drivers/net/netdevsim')
| -rw-r--r-- | drivers/net/netdevsim/devlink.c | 4 | ||||
| -rw-r--r-- | drivers/net/netdevsim/fib.c | 9 | ||||
| -rw-r--r-- | drivers/net/netdevsim/netdevsim.h | 3 |
3 files changed, 10 insertions, 6 deletions
diff --git a/drivers/net/netdevsim/devlink.c b/drivers/net/netdevsim/devlink.c index e8366cf372ff..ba663e5af168 100644 --- a/drivers/net/netdevsim/devlink.c +++ b/drivers/net/netdevsim/devlink.c @@ -163,7 +163,7 @@ static int nsim_devlink_reload(struct devlink *devlink, err = devlink_resource_size_get(devlink, res_ids[i], &val); if (!err) { - err = nsim_fib_set_max(net, res_ids[i], val); + err = nsim_fib_set_max(net, res_ids[i], val, extack); if (err) return err; } @@ -181,7 +181,7 @@ static void nsim_devlink_net_reset(struct net *net) int i; for (i = 0; i < ARRAY_SIZE(res_ids); ++i) { - if (nsim_fib_set_max(net, res_ids[i], (u64)-1)) { + if (nsim_fib_set_max(net, res_ids[i], (u64)-1, NULL)) { pr_err("Failed to reset limit for resource %u\n", res_ids[i]); } diff --git a/drivers/net/netdevsim/fib.c b/drivers/net/netdevsim/fib.c index 9bfe9e151e13..f61d094746c0 100644 --- a/drivers/net/netdevsim/fib.c +++ b/drivers/net/netdevsim/fib.c @@ -64,7 +64,8 @@ u64 nsim_fib_get_val(struct net *net, enum nsim_resource_id res_id, bool max) return max ? entry->max : entry->num; } -int nsim_fib_set_max(struct net *net, enum nsim_resource_id res_id, u64 val) +int nsim_fib_set_max(struct net *net, enum nsim_resource_id res_id, u64 val, + struct netlink_ext_ack *extack) { struct nsim_fib_data *fib_data = net_generic(net, nsim_fib_net_id); struct nsim_fib_entry *entry; @@ -90,10 +91,12 @@ int nsim_fib_set_max(struct net *net, enum nsim_resource_id res_id, u64 val) /* not allowing a new max to be less than curren occupancy * --> no means of evicting entries */ - if (val < entry->num) + if (val < entry->num) { + NL_SET_ERR_MSG_MOD(extack, "New size is less than current occupancy"); err = -EINVAL; - else + } else { entry->max = val; + } return err; } diff --git a/drivers/net/netdevsim/netdevsim.h b/drivers/net/netdevsim/netdevsim.h index 3a8581af3b85..8ca50b72c328 100644 --- a/drivers/net/netdevsim/netdevsim.h +++ b/drivers/net/netdevsim/netdevsim.h @@ -126,7 +126,8 @@ void nsim_devlink_exit(void); int nsim_fib_init(void); void nsim_fib_exit(void); u64 nsim_fib_get_val(struct net *net, enum nsim_resource_id res_id, bool max); -int nsim_fib_set_max(struct net *net, enum nsim_resource_id res_id, u64 val); +int nsim_fib_set_max(struct net *net, enum nsim_resource_id res_id, u64 val, + struct netlink_ext_ack *extack); #else static inline int nsim_devlink_setup(struct netdevsim *ns) { |
