From: Hongchao Zhang <hongchao.zhang@xxxxxxxxx> In struct kkuc_reg, the "kr_data" is difficult to be freed outside of libcfs, then it's better to change it to be inline data instead of the data pointer. Signed-off-by: Hongchao Zhang <hongchao.zhang@xxxxxxxxx> Intel-bug-id: https://jira.hpdd.intel.com/browse/LU-6485 Reviewed-on: http://review.whamcloud.com/14638 Reviewed-by: John L. Hammond <john.hammond@xxxxxxxxx> Reviewed-by: James Simmons <uja.ornl@xxxxxxxxx> Reviewed-by: frank zago <fzago@xxxxxxxx> Reviewed-by: Robert Read <robert.read@xxxxxxxxx> Reviewed-by: Henri Doreau <henri.doreau@xxxxxx> Reviewed-by: Oleg Drokin <oleg.drokin@xxxxxxxxx> --- .../lustre/lustre/include/lustre_kernelcomm.h | 4 +- drivers/staging/lustre/lustre/lmv/lmv_obd.c | 22 ++++++------------- drivers/staging/lustre/lustre/mdc/mdc_request.c | 2 +- .../staging/lustre/lustre/obdclass/kernelcomm.c | 12 ++++------ 4 files changed, 15 insertions(+), 25 deletions(-) diff --git a/drivers/staging/lustre/lustre/include/lustre_kernelcomm.h b/drivers/staging/lustre/lustre/include/lustre_kernelcomm.h index bb305f4..235b980 100644 --- a/drivers/staging/lustre/lustre/include/lustre_kernelcomm.h +++ b/drivers/staging/lustre/lustre/include/lustre_kernelcomm.h @@ -47,8 +47,8 @@ typedef int (*libcfs_kkuc_cb_t)(void *data, void *cb_arg); int libcfs_kkuc_msg_put(struct file *fp, void *payload); int libcfs_kkuc_group_put(int group, void *payload); int libcfs_kkuc_group_add(struct file *fp, int uid, unsigned int group, - void *data); -int libcfs_kkuc_group_rem(int uid, int group, void **pdata); + void *data, size_t data_len); +int libcfs_kkuc_group_rem(int uid, int group); int libcfs_kkuc_group_foreach(int group, libcfs_kkuc_cb_t cb_func, void *cb_arg); diff --git a/drivers/staging/lustre/lustre/lmv/lmv_obd.c b/drivers/staging/lustre/lustre/lmv/lmv_obd.c index 2ad2904..c2c8b72 100644 --- a/drivers/staging/lustre/lustre/lmv/lmv_obd.c +++ b/drivers/staging/lustre/lustre/lmv/lmv_obd.c @@ -795,7 +795,6 @@ static void lmv_hsm_req_build(struct lmv_obd *lmv, static int lmv_hsm_ct_unregister(struct lmv_obd *lmv, unsigned int cmd, int len, struct lustre_kernelcomm *lk, void *uarg) { - struct kkuc_ct_data *kcd = NULL; int rc = 0; __u32 i; @@ -810,9 +809,7 @@ static int lmv_hsm_ct_unregister(struct lmv_obd *lmv, unsigned int cmd, int len, * Unreached coordinators will get EPIPE on next requests * and will unregister automatically. */ - rc = libcfs_kkuc_group_rem(lk->lk_uid, lk->lk_group, (void **)&kcd); - if (kcd) - kfree(kcd); + rc = libcfs_kkuc_group_rem(lk->lk_uid, lk->lk_group); return rc; } @@ -824,7 +821,7 @@ static int lmv_hsm_ct_register(struct lmv_obd *lmv, unsigned int cmd, int len, __u32 i, j; int err, rc = 0; bool any_set = false; - struct kkuc_ct_data *kcd; + struct kkuc_ct_data kcd = { 0 }; /* All or nothing: try to register to all MDS. * In case of failure, unregister from previous MDS, @@ -864,20 +861,15 @@ static int lmv_hsm_ct_register(struct lmv_obd *lmv, unsigned int cmd, int len, if (!filp) return -EBADF; - kcd = kzalloc(sizeof(*kcd), GFP_NOFS); - if (!kcd) { - fput(filp); - return -ENOMEM; - } - kcd->kcd_magic = KKUC_CT_DATA_MAGIC; - kcd->kcd_uuid = lmv->cluuid; - kcd->kcd_archive = lk->lk_data; + kcd.kcd_magic = KKUC_CT_DATA_MAGIC; + kcd.kcd_uuid = lmv->cluuid; + kcd.kcd_archive = lk->lk_data; - rc = libcfs_kkuc_group_add(filp, lk->lk_uid, lk->lk_group, kcd); + rc = libcfs_kkuc_group_add(filp, lk->lk_uid, lk->lk_group, + &kcd, sizeof(kcd)); if (rc) { if (filp) fput(filp); - kfree(kcd); } return rc; diff --git a/drivers/staging/lustre/lustre/mdc/mdc_request.c b/drivers/staging/lustre/lustre/mdc/mdc_request.c index a4c543a..ee1c040 100644 --- a/drivers/staging/lustre/lustre/mdc/mdc_request.c +++ b/drivers/staging/lustre/lustre/mdc/mdc_request.c @@ -2391,7 +2391,7 @@ static int mdc_precleanup(struct obd_device *obd, enum obd_cleanup_stage stage) case OBD_CLEANUP_EXPORTS: /* Failsafe, ok if racy */ if (obd->obd_type->typ_refcnt <= 1) - libcfs_kkuc_group_rem(0, KUC_GRP_HSM, NULL); + libcfs_kkuc_group_rem(0, KUC_GRP_HSM); obd_cleanup_client_import(obd); ptlrpc_lprocfs_unregister_obd(obd); diff --git a/drivers/staging/lustre/lustre/obdclass/kernelcomm.c b/drivers/staging/lustre/lustre/obdclass/kernelcomm.c index e3f5a3c..e290246 100644 --- a/drivers/staging/lustre/lustre/obdclass/kernelcomm.c +++ b/drivers/staging/lustre/lustre/obdclass/kernelcomm.c @@ -97,7 +97,7 @@ struct kkuc_reg { struct list_head kr_chain; int kr_uid; struct file *kr_fp; - void *kr_data; + char kr_data[0]; }; static struct list_head kkuc_groups[KUC_GRP_MAX+1] = {}; @@ -111,7 +111,7 @@ static DECLARE_RWSEM(kg_sem); * @param data user data */ int libcfs_kkuc_group_add(struct file *filp, int uid, unsigned int group, - void *data) + void *data, size_t data_len) { struct kkuc_reg *reg; @@ -125,13 +125,13 @@ int libcfs_kkuc_group_add(struct file *filp, int uid, unsigned int group, return -EBADF; /* freed in group_rem */ - reg = kmalloc(sizeof(*reg), 0); + reg = kmalloc(sizeof(*reg) + data_len, 0); if (reg == NULL) return -ENOMEM; reg->kr_fp = filp; reg->kr_uid = uid; - reg->kr_data = data; + memcpy(reg->kr_data, data, data_len); down_write(&kg_sem); if (kkuc_groups[group].next == NULL) @@ -145,7 +145,7 @@ int libcfs_kkuc_group_add(struct file *filp, int uid, unsigned int group, } EXPORT_SYMBOL(libcfs_kkuc_group_add); -int libcfs_kkuc_group_rem(int uid, int group, void **pdata) +int libcfs_kkuc_group_rem(int uid, int group) { struct kkuc_reg *reg, *next; @@ -171,8 +171,6 @@ int libcfs_kkuc_group_rem(int uid, int group, void **pdata) reg->kr_uid, reg->kr_fp, group); if (reg->kr_fp != NULL) fput(reg->kr_fp); - if (pdata) - *pdata = reg->kr_data; kfree(reg); } } -- 1.7.1 _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
