lkml.org 
[lkml]   [2023]   [Dec]   [10]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    Subject[RFC PATCH net-next 04/13] net/smc: implement ID-related operations of loopback-ism
    Date
    This implements GID and CHID related operations of loopback-ism device.
    loopback-ism acts as an ISMv2. It's GID is generated randomly by UUIDv4
    algorithm and CHID is reserved 0xFFFF.

    Signed-off-by: Wen Gu <guwen@linux.alibaba.com>
    ---
    net/smc/smc_loopback.c | 62 ++++++++++++++++++++++++++++++++++++++++++++++----
    net/smc/smc_loopback.h | 3 +++
    2 files changed, 60 insertions(+), 5 deletions(-)

    diff --git a/net/smc/smc_loopback.c b/net/smc/smc_loopback.c
    index 149ccaa..39e8c8d 100644
    --- a/net/smc/smc_loopback.c
    +++ b/net/smc/smc_loopback.c
    @@ -19,12 +19,63 @@
    #include "smc_loopback.h"

    #if IS_ENABLED(CONFIG_SMC_LO)
    +#define SMC_LO_V2_CAPABLE 0x1 /* loopback-ism acts as ISMv2 */
    +
    static const char smc_lo_dev_name[] = "loopback-ism";
    static struct smc_lo_dev *lo_dev;
    static struct class *smc_class;

    +static void smc_lo_generate_id(struct smc_lo_dev *ldev)
    +{
    + struct smcd_gid *lgid = &ldev->local_gid;
    + uuid_t uuid;
    +
    + uuid_gen(&uuid);
    + memcpy(&lgid->gid, &uuid, sizeof(lgid->gid));
    + memcpy(&lgid->gid_ext, (u8 *)&uuid + sizeof(lgid->gid),
    + sizeof(lgid->gid_ext));
    +
    + ldev->chid = SMC_LO_CHID;
    +}
    +
    +static int smc_lo_query_rgid(struct smcd_dev *smcd, struct smcd_gid *rgid,
    + u32 vid_valid, u32 vid)
    +{
    + struct smc_lo_dev *ldev = smcd->priv;
    +
    + /* rgid should equal to lgid in loopback situation */
    + if (!ldev || rgid->gid != ldev->local_gid.gid ||
    + rgid->gid_ext != ldev->local_gid.gid_ext)
    + return -ENETUNREACH;
    + return 0;
    +}
    +
    +static int smc_lo_supports_v2(void)
    +{
    + return SMC_LO_V2_CAPABLE;
    +}
    +
    +static void smc_lo_get_local_gid(struct smcd_dev *smcd,
    + struct smcd_gid *smcd_gid)
    +{
    + struct smc_lo_dev *ldev = smcd->priv;
    +
    + smcd_gid->gid = ldev->local_gid.gid;
    + smcd_gid->gid_ext = ldev->local_gid.gid_ext;
    +}
    +
    +static u16 smc_lo_get_chid(struct smcd_dev *smcd)
    +{
    + return ((struct smc_lo_dev *)smcd->priv)->chid;
    +}
    +
    +static struct device *smc_lo_get_dev(struct smcd_dev *smcd)
    +{
    + return &((struct smc_lo_dev *)smcd->priv)->dev;
    +}
    +
    static const struct smcd_ops lo_ops = {
    - .query_remote_gid = NULL,
    + .query_remote_gid = smc_lo_query_rgid,
    .register_dmb = NULL,
    .unregister_dmb = NULL,
    .add_vlan_id = NULL,
    @@ -33,10 +84,10 @@
    .reset_vlan_required = NULL,
    .signal_event = NULL,
    .move_data = NULL,
    - .supports_v2 = NULL,
    - .get_local_gid = NULL,
    - .get_chid = NULL,
    - .get_dev = NULL,
    + .supports_v2 = smc_lo_supports_v2,
    + .get_local_gid = smc_lo_get_local_gid,
    + .get_chid = smc_lo_get_chid,
    + .get_dev = smc_lo_get_dev,
    };

    static struct smcd_dev *smcd_lo_alloc_dev(const struct smcd_ops *ops,
    @@ -96,6 +147,7 @@ static void smcd_lo_unregister_dev(struct smc_lo_dev *ldev)

    static int smc_lo_dev_init(struct smc_lo_dev *ldev)
    {
    + smc_lo_generate_id(ldev);
    return smcd_lo_register_dev(ldev);
    }

    diff --git a/net/smc/smc_loopback.h b/net/smc/smc_loopback.h
    index a7c418b..73eed6a 100644
    --- a/net/smc/smc_loopback.h
    +++ b/net/smc/smc_loopback.h
    @@ -20,10 +20,13 @@

    #if IS_ENABLED(CONFIG_SMC_LO)
    #define SMC_LO_MAX_DMBS 5000
    +#define SMC_LO_CHID 0xFFFF

    struct smc_lo_dev {
    struct smcd_dev *smcd;
    struct device dev;
    + u16 chid;
    + struct smcd_gid local_gid;
    };
    #endif

    --
    1.8.3.1
    \
     
     \ /
      Last update: 2023-12-10 14:25    [W:5.185 / U:0.012 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site