| Message ID | 1488915118-23331-1-git-send-email-yuval.shaia@oracle.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
On Tue, Mar 07, 2017 at 09:31:58PM +0200, Yuval Shaia wrote: > This logic seems to be duplicated in (at least) three separate files. > Move it to one place so code can be re-use. > > Signed-off-by: Yuval Shaia <yuval.shaia@oracle.com> > --- > v0 -> v1: > * Add missing #include > * Rename to genaddrconf_ifid_eui48 > v1 -> v2: > * Reset eui[0] to default if dev_id is used > v2 -> v3: > * Add helper function to avoid re-setting eui[0] to default if > dev_id is used > --- > drivers/infiniband/hw/usnic/usnic_common_util.h | 11 +++-------- > drivers/infiniband/sw/rxe/rxe_net.c | 11 ++--------- > include/net/addrconf.h | 25 +++++++++++++++++++------ > 3 files changed, 24 insertions(+), 23 deletions(-) Not promising statistics :) > > diff --git a/drivers/infiniband/hw/usnic/usnic_common_util.h b/drivers/infiniband/hw/usnic/usnic_common_util.h > index b54986d..d91b035 100644 > --- a/drivers/infiniband/hw/usnic/usnic_common_util.h > +++ b/drivers/infiniband/hw/usnic/usnic_common_util.h > @@ -34,6 +34,8 @@ > #ifndef USNIC_CMN_UTIL_H > #define USNIC_CMN_UTIL_H > > +#include <net/addrconf.h> > + > static inline void > usnic_mac_to_gid(const char *const mac, char *raw_gid) > { > @@ -57,14 +59,7 @@ usnic_mac_ip_to_gid(const char *const mac, const __be32 inaddr, char *raw_gid) > raw_gid[1] = 0x80; > memset(&raw_gid[2], 0, 2); > memcpy(&raw_gid[4], &inaddr, 4); > - raw_gid[8] = mac[0]^2; > - raw_gid[9] = mac[1]; > - raw_gid[10] = mac[2]; > - raw_gid[11] = 0xff; > - raw_gid[12] = 0xfe; > - raw_gid[13] = mac[3]; > - raw_gid[14] = mac[4]; > - raw_gid[15] = mac[5]; > + addrconf_addr_eui48(&raw_gid[8], mac); > } > > static inline void > diff --git a/drivers/infiniband/sw/rxe/rxe_net.c b/drivers/infiniband/sw/rxe/rxe_net.c > index d8610960..ab8ea23 100644 > --- a/drivers/infiniband/sw/rxe/rxe_net.c > +++ b/drivers/infiniband/sw/rxe/rxe_net.c > @@ -38,6 +38,7 @@ > #include <linux/if_vlan.h> > #include <net/udp_tunnel.h> > #include <net/sch_generic.h> > +#include <net/addrconf.h> > #include <linux/netfilter.h> > #include <rdma/ib_addr.h> > > @@ -86,18 +87,10 @@ struct rxe_recv_sockets recv_sockets; > > static __be64 rxe_mac_to_eui64(struct net_device *ndev) > { It is worth to drop this wrapper completely. The rxe_mac_to_eui64 is called twice in the same file. > - unsigned char *mac_addr = ndev->dev_addr; > __be64 eui64; > unsigned char *dst = (unsigned char *)&eui64; > > - dst[0] = mac_addr[0] ^ 2; > - dst[1] = mac_addr[1]; > - dst[2] = mac_addr[2]; > - dst[3] = 0xff; > - dst[4] = 0xfe; > - dst[5] = mac_addr[3]; > - dst[6] = mac_addr[4]; > - dst[7] = mac_addr[5]; > + addrconf_addr_eui48(dst, ndev->dev_addr); > > return eui64; > } > diff --git a/include/net/addrconf.h b/include/net/addrconf.h > index 17c6fd8..28274ed 100644 > --- a/include/net/addrconf.h > +++ b/include/net/addrconf.h > @@ -103,12 +103,25 @@ int addrconf_prefix_rcv_add_addr(struct net *net, struct net_device *dev, > u32 addr_flags, bool sllao, bool tokenized, > __u32 valid_lft, u32 prefered_lft); > > +static inline void addrconf_addr_eui48_xor(u8 *eui, const char *const addr, bool xor) > +{ > + memcpy(eui, addr, 3); > + if (xor) > + eui[0] ^= 2; > + eui[3] = 0xFF; > + eui[4] = 0xFE; > + memcpy(eui + 5, addr + 3, 3); > +} > + > +static inline void addrconf_addr_eui48(u8 *eui, const char *const addr) > +{ > + addrconf_addr_eui48_xor(eui, addr, true); Just put your "eui[0] ^= 2" here and remove redundant "if (xor)". > +} > + > static inline int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) > { > if (dev->addr_len != ETH_ALEN) > return -1; > - memcpy(eui, dev->dev_addr, 3); > - memcpy(eui + 5, dev->dev_addr + 3, 3); > > /* > * The zSeries OSA network cards can be shared among various > @@ -123,14 +136,14 @@ static inline int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) > * case. Hence the resulting interface identifier has local > * scope according to RFC2373. > */ > + > + addrconf_addr_eui48_xor(eui, dev->dev_addr, !dev->dev_id); > + > if (dev->dev_id) { > eui[3] = (dev->dev_id >> 8) & 0xFF; > eui[4] = dev->dev_id & 0xFF; > - } else { > - eui[3] = 0xFF; > - eui[4] = 0xFE; > - eui[0] ^= 2; Leave this line. Thanks > } > + > return 0; > } > > -- > 2.7.4 >
On Wed, Mar 08, 2017 at 09:40:41AM +0200, Leon Romanovsky wrote: > On Tue, Mar 07, 2017 at 09:31:58PM +0200, Yuval Shaia wrote: > > This logic seems to be duplicated in (at least) three separate files. > > Move it to one place so code can be re-use. > > > > Signed-off-by: Yuval Shaia <yuval.shaia@oracle.com> > > --- > > v0 -> v1: > > * Add missing #include > > * Rename to genaddrconf_ifid_eui48 > > v1 -> v2: > > * Reset eui[0] to default if dev_id is used > > v2 -> v3: > > * Add helper function to avoid re-setting eui[0] to default if > > dev_id is used > > --- > > drivers/infiniband/hw/usnic/usnic_common_util.h | 11 +++-------- > > drivers/infiniband/sw/rxe/rxe_net.c | 11 ++--------- > > include/net/addrconf.h | 25 +++++++++++++++++++------ > > 3 files changed, 24 insertions(+), 23 deletions(-) > > Not promising statistics :) It is not fair, i also added 4 new blank lines :) > > > > > diff --git a/drivers/infiniband/hw/usnic/usnic_common_util.h b/drivers/infiniband/hw/usnic/usnic_common_util.h > > index b54986d..d91b035 100644 > > --- a/drivers/infiniband/hw/usnic/usnic_common_util.h > > +++ b/drivers/infiniband/hw/usnic/usnic_common_util.h > > @@ -34,6 +34,8 @@ > > #ifndef USNIC_CMN_UTIL_H > > #define USNIC_CMN_UTIL_H > > > > +#include <net/addrconf.h> > > + > > static inline void > > usnic_mac_to_gid(const char *const mac, char *raw_gid) > > { > > @@ -57,14 +59,7 @@ usnic_mac_ip_to_gid(const char *const mac, const __be32 inaddr, char *raw_gid) > > raw_gid[1] = 0x80; > > memset(&raw_gid[2], 0, 2); > > memcpy(&raw_gid[4], &inaddr, 4); > > - raw_gid[8] = mac[0]^2; > > - raw_gid[9] = mac[1]; > > - raw_gid[10] = mac[2]; > > - raw_gid[11] = 0xff; > > - raw_gid[12] = 0xfe; > > - raw_gid[13] = mac[3]; > > - raw_gid[14] = mac[4]; > > - raw_gid[15] = mac[5]; > > + addrconf_addr_eui48(&raw_gid[8], mac); > > } > > > > static inline void > > diff --git a/drivers/infiniband/sw/rxe/rxe_net.c b/drivers/infiniband/sw/rxe/rxe_net.c > > index d8610960..ab8ea23 100644 > > --- a/drivers/infiniband/sw/rxe/rxe_net.c > > +++ b/drivers/infiniband/sw/rxe/rxe_net.c > > @@ -38,6 +38,7 @@ > > #include <linux/if_vlan.h> > > #include <net/udp_tunnel.h> > > #include <net/sch_generic.h> > > +#include <net/addrconf.h> > > #include <linux/netfilter.h> > > #include <rdma/ib_addr.h> > > > > @@ -86,18 +87,10 @@ struct rxe_recv_sockets recv_sockets; > > > > static __be64 rxe_mac_to_eui64(struct net_device *ndev) > > { > > It is worth to drop this wrapper completely. The rxe_mac_to_eui64 is > called twice in the same file. hmmm, this is a classic wrapper to adapt an existing API signature to usage. And in this case to return __be64 from existing function which returns void. What we can do is the opposite - get rid of rxe_node_guid and rxe_port_guid and call directly to rxe_mac_to_eui64. This is based on the assumption that node_guid and port_guid are the same in Soft RoCE. What do you think? > > > - unsigned char *mac_addr = ndev->dev_addr; > > __be64 eui64; > > unsigned char *dst = (unsigned char *)&eui64; > > > > - dst[0] = mac_addr[0] ^ 2; > > - dst[1] = mac_addr[1]; > > - dst[2] = mac_addr[2]; > > - dst[3] = 0xff; > > - dst[4] = 0xfe; > > - dst[5] = mac_addr[3]; > > - dst[6] = mac_addr[4]; > > - dst[7] = mac_addr[5]; > > + addrconf_addr_eui48(dst, ndev->dev_addr); > > > > return eui64; > > } > > diff --git a/include/net/addrconf.h b/include/net/addrconf.h > > index 17c6fd8..28274ed 100644 > > --- a/include/net/addrconf.h > > +++ b/include/net/addrconf.h > > @@ -103,12 +103,25 @@ int addrconf_prefix_rcv_add_addr(struct net *net, struct net_device *dev, > > u32 addr_flags, bool sllao, bool tokenized, > > __u32 valid_lft, u32 prefered_lft); > > > > +static inline void addrconf_addr_eui48_xor(u8 *eui, const char *const addr, bool xor) > > +{ > > + memcpy(eui, addr, 3); > > + if (xor) > > + eui[0] ^= 2; > > + eui[3] = 0xFF; > > + eui[4] = 0xFE; > > + memcpy(eui + 5, addr + 3, 3); > > +} > > + > > +static inline void addrconf_addr_eui48(u8 *eui, const char *const addr) > > +{ > > + addrconf_addr_eui48_xor(eui, addr, true); > > Just put your "eui[0] ^= 2" here and remove redundant "if (xor)". > > +} > > + > > static inline int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) > > { > > if (dev->addr_len != ETH_ALEN) > > return -1; > > - memcpy(eui, dev->dev_addr, 3); > > - memcpy(eui + 5, dev->dev_addr + 3, 3); > > > > /* > > * The zSeries OSA network cards can be shared among various > > @@ -123,14 +136,14 @@ static inline int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) > > * case. Hence the resulting interface identifier has local > > * scope according to RFC2373. > > */ > > + > > + addrconf_addr_eui48_xor(eui, dev->dev_addr, !dev->dev_id); > > + > > if (dev->dev_id) { > > eui[3] = (dev->dev_id >> 8) & 0xFF; > > eui[4] = dev->dev_id & 0xFF; > > - } else { > > - eui[3] = 0xFF; > > - eui[4] = 0xFE; > > - eui[0] ^= 2; > > Leave this line. Along with the above comment - looks better, will do. > Thanks > > > } > > + > > return 0; > > } > > > > -- > > 2.7.4 > > -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On Wed, Mar 08, 2017 at 03:48:57PM +0200, Yuval Shaia wrote: > On Wed, Mar 08, 2017 at 09:40:41AM +0200, Leon Romanovsky wrote: > > On Tue, Mar 07, 2017 at 09:31:58PM +0200, Yuval Shaia wrote: > > > This logic seems to be duplicated in (at least) three separate files. > > > Move it to one place so code can be re-use. > > > > > > Signed-off-by: Yuval Shaia <yuval.shaia@oracle.com> > > > --- > > > v0 -> v1: > > > * Add missing #include > > > * Rename to genaddrconf_ifid_eui48 > > > v1 -> v2: > > > * Reset eui[0] to default if dev_id is used > > > v2 -> v3: > > > * Add helper function to avoid re-setting eui[0] to default if > > > dev_id is used > > > --- > > > drivers/infiniband/hw/usnic/usnic_common_util.h | 11 +++-------- > > > drivers/infiniband/sw/rxe/rxe_net.c | 11 ++--------- > > > include/net/addrconf.h | 25 +++++++++++++++++++------ > > > 3 files changed, 24 insertions(+), 23 deletions(-) > > > > Not promising statistics :) > > It is not fair, i also added 4 new blank lines :) > > > > > > > > > diff --git a/drivers/infiniband/hw/usnic/usnic_common_util.h b/drivers/infiniband/hw/usnic/usnic_common_util.h > > > index b54986d..d91b035 100644 > > > --- a/drivers/infiniband/hw/usnic/usnic_common_util.h > > > +++ b/drivers/infiniband/hw/usnic/usnic_common_util.h > > > @@ -34,6 +34,8 @@ > > > #ifndef USNIC_CMN_UTIL_H > > > #define USNIC_CMN_UTIL_H > > > > > > +#include <net/addrconf.h> > > > + > > > static inline void > > > usnic_mac_to_gid(const char *const mac, char *raw_gid) > > > { > > > @@ -57,14 +59,7 @@ usnic_mac_ip_to_gid(const char *const mac, const __be32 inaddr, char *raw_gid) > > > raw_gid[1] = 0x80; > > > memset(&raw_gid[2], 0, 2); > > > memcpy(&raw_gid[4], &inaddr, 4); > > > - raw_gid[8] = mac[0]^2; > > > - raw_gid[9] = mac[1]; > > > - raw_gid[10] = mac[2]; > > > - raw_gid[11] = 0xff; > > > - raw_gid[12] = 0xfe; > > > - raw_gid[13] = mac[3]; > > > - raw_gid[14] = mac[4]; > > > - raw_gid[15] = mac[5]; > > > + addrconf_addr_eui48(&raw_gid[8], mac); > > > } > > > > > > static inline void > > > diff --git a/drivers/infiniband/sw/rxe/rxe_net.c b/drivers/infiniband/sw/rxe/rxe_net.c > > > index d8610960..ab8ea23 100644 > > > --- a/drivers/infiniband/sw/rxe/rxe_net.c > > > +++ b/drivers/infiniband/sw/rxe/rxe_net.c > > > @@ -38,6 +38,7 @@ > > > #include <linux/if_vlan.h> > > > #include <net/udp_tunnel.h> > > > #include <net/sch_generic.h> > > > +#include <net/addrconf.h> > > > #include <linux/netfilter.h> > > > #include <rdma/ib_addr.h> > > > > > > @@ -86,18 +87,10 @@ struct rxe_recv_sockets recv_sockets; > > > > > > static __be64 rxe_mac_to_eui64(struct net_device *ndev) > > > { > > > > It is worth to drop this wrapper completely. The rxe_mac_to_eui64 is > > called twice in the same file. > > hmmm, this is a classic wrapper to adapt an existing API signature to > usage. And in this case to return __be64 from existing function which > returns void. > > What we can do is the opposite - get rid of rxe_node_guid and rxe_port_guid > and call directly to rxe_mac_to_eui64. This is based on the assumption that > node_guid and port_guid are the same in Soft RoCE. > What do you think? As long as you will add a meaningful comment in these places. Right now, the knowledge of node_guid == port_guid in RXE is very clear, it is worth to preserve it (knowledge). > > > > > > - unsigned char *mac_addr = ndev->dev_addr; > > > __be64 eui64; > > > unsigned char *dst = (unsigned char *)&eui64; > > > > > > - dst[0] = mac_addr[0] ^ 2; > > > - dst[1] = mac_addr[1]; > > > - dst[2] = mac_addr[2]; > > > - dst[3] = 0xff; > > > - dst[4] = 0xfe; > > > - dst[5] = mac_addr[3]; > > > - dst[6] = mac_addr[4]; > > > - dst[7] = mac_addr[5]; > > > + addrconf_addr_eui48(dst, ndev->dev_addr); > > > > > > return eui64; > > > } > > > diff --git a/include/net/addrconf.h b/include/net/addrconf.h > > > index 17c6fd8..28274ed 100644 > > > --- a/include/net/addrconf.h > > > +++ b/include/net/addrconf.h > > > @@ -103,12 +103,25 @@ int addrconf_prefix_rcv_add_addr(struct net *net, struct net_device *dev, > > > u32 addr_flags, bool sllao, bool tokenized, > > > __u32 valid_lft, u32 prefered_lft); > > > > > > +static inline void addrconf_addr_eui48_xor(u8 *eui, const char *const addr, bool xor) > > > +{ > > > + memcpy(eui, addr, 3); > > > + if (xor) > > > + eui[0] ^= 2; > > > + eui[3] = 0xFF; > > > + eui[4] = 0xFE; > > > + memcpy(eui + 5, addr + 3, 3); > > > +} > > > + > > > +static inline void addrconf_addr_eui48(u8 *eui, const char *const addr) > > > +{ > > > + addrconf_addr_eui48_xor(eui, addr, true); > > > > Just put your "eui[0] ^= 2" here and remove redundant "if (xor)". > > > +} > > > + > > > static inline int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) > > > { > > > if (dev->addr_len != ETH_ALEN) > > > return -1; > > > - memcpy(eui, dev->dev_addr, 3); > > > - memcpy(eui + 5, dev->dev_addr + 3, 3); > > > > > > /* > > > * The zSeries OSA network cards can be shared among various > > > @@ -123,14 +136,14 @@ static inline int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) > > > * case. Hence the resulting interface identifier has local > > > * scope according to RFC2373. > > > */ > > > + > > > + addrconf_addr_eui48_xor(eui, dev->dev_addr, !dev->dev_id); > > > + > > > if (dev->dev_id) { > > > eui[3] = (dev->dev_id >> 8) & 0xFF; > > > eui[4] = dev->dev_id & 0xFF; > > > - } else { > > > - eui[3] = 0xFF; > > > - eui[4] = 0xFE; > > > - eui[0] ^= 2; > > > > Leave this line. > > Along with the above comment - looks better, will do. > > > Thanks > > > > > } > > > + > > > return 0; > > > } > > > > > > -- > > > 2.7.4 > > > > >
diff --git a/drivers/infiniband/hw/usnic/usnic_common_util.h b/drivers/infiniband/hw/usnic/usnic_common_util.h index b54986d..d91b035 100644 --- a/drivers/infiniband/hw/usnic/usnic_common_util.h +++ b/drivers/infiniband/hw/usnic/usnic_common_util.h @@ -34,6 +34,8 @@ #ifndef USNIC_CMN_UTIL_H #define USNIC_CMN_UTIL_H +#include <net/addrconf.h> + static inline void usnic_mac_to_gid(const char *const mac, char *raw_gid) { @@ -57,14 +59,7 @@ usnic_mac_ip_to_gid(const char *const mac, const __be32 inaddr, char *raw_gid) raw_gid[1] = 0x80; memset(&raw_gid[2], 0, 2); memcpy(&raw_gid[4], &inaddr, 4); - raw_gid[8] = mac[0]^2; - raw_gid[9] = mac[1]; - raw_gid[10] = mac[2]; - raw_gid[11] = 0xff; - raw_gid[12] = 0xfe; - raw_gid[13] = mac[3]; - raw_gid[14] = mac[4]; - raw_gid[15] = mac[5]; + addrconf_addr_eui48(&raw_gid[8], mac); } static inline void diff --git a/drivers/infiniband/sw/rxe/rxe_net.c b/drivers/infiniband/sw/rxe/rxe_net.c index d8610960..ab8ea23 100644 --- a/drivers/infiniband/sw/rxe/rxe_net.c +++ b/drivers/infiniband/sw/rxe/rxe_net.c @@ -38,6 +38,7 @@ #include <linux/if_vlan.h> #include <net/udp_tunnel.h> #include <net/sch_generic.h> +#include <net/addrconf.h> #include <linux/netfilter.h> #include <rdma/ib_addr.h> @@ -86,18 +87,10 @@ struct rxe_recv_sockets recv_sockets; static __be64 rxe_mac_to_eui64(struct net_device *ndev) { - unsigned char *mac_addr = ndev->dev_addr; __be64 eui64; unsigned char *dst = (unsigned char *)&eui64; - dst[0] = mac_addr[0] ^ 2; - dst[1] = mac_addr[1]; - dst[2] = mac_addr[2]; - dst[3] = 0xff; - dst[4] = 0xfe; - dst[5] = mac_addr[3]; - dst[6] = mac_addr[4]; - dst[7] = mac_addr[5]; + addrconf_addr_eui48(dst, ndev->dev_addr); return eui64; } diff --git a/include/net/addrconf.h b/include/net/addrconf.h index 17c6fd8..28274ed 100644 --- a/include/net/addrconf.h +++ b/include/net/addrconf.h @@ -103,12 +103,25 @@ int addrconf_prefix_rcv_add_addr(struct net *net, struct net_device *dev, u32 addr_flags, bool sllao, bool tokenized, __u32 valid_lft, u32 prefered_lft); +static inline void addrconf_addr_eui48_xor(u8 *eui, const char *const addr, bool xor) +{ + memcpy(eui, addr, 3); + if (xor) + eui[0] ^= 2; + eui[3] = 0xFF; + eui[4] = 0xFE; + memcpy(eui + 5, addr + 3, 3); +} + +static inline void addrconf_addr_eui48(u8 *eui, const char *const addr) +{ + addrconf_addr_eui48_xor(eui, addr, true); +} + static inline int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) { if (dev->addr_len != ETH_ALEN) return -1; - memcpy(eui, dev->dev_addr, 3); - memcpy(eui + 5, dev->dev_addr + 3, 3); /* * The zSeries OSA network cards can be shared among various @@ -123,14 +136,14 @@ static inline int addrconf_ifid_eui48(u8 *eui, struct net_device *dev) * case. Hence the resulting interface identifier has local * scope according to RFC2373. */ + + addrconf_addr_eui48_xor(eui, dev->dev_addr, !dev->dev_id); + if (dev->dev_id) { eui[3] = (dev->dev_id >> 8) & 0xFF; eui[4] = dev->dev_id & 0xFF; - } else { - eui[3] = 0xFF; - eui[4] = 0xFE; - eui[0] ^= 2; } + return 0; }
This logic seems to be duplicated in (at least) three separate files. Move it to one place so code can be re-use. Signed-off-by: Yuval Shaia <yuval.shaia@oracle.com> --- v0 -> v1: * Add missing #include * Rename to genaddrconf_ifid_eui48 v1 -> v2: * Reset eui[0] to default if dev_id is used v2 -> v3: * Add helper function to avoid re-setting eui[0] to default if dev_id is used --- drivers/infiniband/hw/usnic/usnic_common_util.h | 11 +++-------- drivers/infiniband/sw/rxe/rxe_net.c | 11 ++--------- include/net/addrconf.h | 25 +++++++++++++++++++------ 3 files changed, 24 insertions(+), 23 deletions(-)