diff options
Diffstat (limited to 'target/linux/generic-2.6/files/crypto/ocf/ep80579/icp_sym.c')
| -rw-r--r-- | target/linux/generic-2.6/files/crypto/ocf/ep80579/icp_sym.c | 423 |
1 files changed, 97 insertions, 326 deletions
diff --git a/target/linux/generic-2.6/files/crypto/ocf/ep80579/icp_sym.c b/target/linux/generic-2.6/files/crypto/ocf/ep80579/icp_sym.c index d63297016..e1c71484a 100644 --- a/target/linux/generic-2.6/files/crypto/ocf/ep80579/icp_sym.c +++ b/target/linux/generic-2.6/files/crypto/ocf/ep80579/icp_sym.c @@ -5,7 +5,7 @@ * * GPL LICENSE SUMMARY * - * Copyright(c) 2007,2008 Intel Corporation. All rights reserved. + * Copyright(c) 2007,2008,2009 Intel Corporation. All rights reserved. * * This program is free software; you can redistribute it and/or modify * it under the terms of version 2 of the GNU General Public License as @@ -27,7 +27,7 @@ * * BSD LICENSE * - * Copyright(c) 2007,2008 Intel Corporation. All rights reserved. + * Copyright(c) 2007,2008,2009 Intel Corporation. All rights reserved. * All rights reserved. * * Redistribution and use in source and binary forms, with or without @@ -57,7 +57,7 @@ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * - * version: Security.L.1.0.130 + * version: Security.L.1.0.2-229 * ***************************************************************************/ /* @@ -96,38 +96,6 @@ static int icp_ocfDrvAlgorithmSetup(struct cryptoini *cri, CpaCySymSessionSetupData * lacSessCtx); -/*This top level function is used to find a pointer to where a digest is - stored/needs to be inserted. */ -static uint8_t *icp_ocfDrvDigestPointerFind(struct icp_drvOpData *drvOpData, - struct cryptodesc *crp_desc); - -/*This function is called when a digest pointer has to be found within a - SKBUFF.*/ -static inline uint8_t *icp_ocfDrvSkbuffDigestPointerFind(struct icp_drvOpData - *drvOpData, - int offsetInBytes, - uint32_t - digestSizeInBytes); - -/*The following two functions are called if the SKBUFF digest pointer is not - positioned in the linear portion of the buffer (i.e. it is in a linked SKBUFF - or page fragment).*/ -/*This function takes care of the page fragment case.*/ -static inline uint8_t *icp_ocfDrvDigestSkbNRFragsCheck(struct sk_buff *skb, - struct skb_shared_info - *skb_shared, - int offsetInBytes, - uint32_t - digestSizeInBytes); - -/*This function takes care of the linked list case.*/ -static inline uint8_t *icp_ocfDrvDigestSkbFragListCheck(struct sk_buff *skb, - struct skb_shared_info - *skb_shared, - int offsetInBytes, - uint32_t - digestSizeInBytes); - /*This function is used to free an OCF->OCF_DRV session object*/ static void icp_ocfDrvFreeOCFSession(struct icp_drvSessionData *sessionData); @@ -142,7 +110,7 @@ static void icp_ocfDrvFreeOCFSession(struct icp_drvSessionData *sessionData); * Notes : The callbackTag is a pointer to an icp_drvOpData. This memory * object was passed to LAC for the cryptographic processing and contains all * the relevant information for cleaning up buffer handles etc. so that the - * OCF Tolapai Driver portion of this crypto operation can be fully completed. + * OCF EP80579 Driver portion of this crypto operation can be fully completed. */ static void icp_ocfDrvSymCallBack(void *callbackTag, @@ -188,11 +156,12 @@ icp_ocfDrvSymCallBack(void *callbackTag, if (CPA_STATUS_SUCCESS == status) { - if (temp_drvOpData->bufferType == CRYPTO_F_SKBUF) { + if (temp_drvOpData->bufferType == ICP_CRYPTO_F_PACKET_BUF) { if (ICP_OCF_DRV_STATUS_SUCCESS != - icp_ocfDrvBufferListToSkBuff(pDstBuffer, - (struct sk_buff **) - &(crp->crp_buf))) { + icp_ocfDrvBufferListToPacketBuff(pDstBuffer, + (icp_packet_buffer_t + **) + & (crp->crp_buf))) { EPRINTK("%s(): BufferList to SkBuff " "conversion error.\n", __FUNCTION__); crp->crp_etype = EPERM; @@ -213,10 +182,10 @@ icp_ocfDrvSymCallBack(void *callbackTag, if (temp_drvOpData->numBufferListArray > ICP_OCF_DRV_DEFAULT_BUFFLIST_ARRAYS) { - kfree(pDstBuffer->pBuffers); + icp_kfree(pDstBuffer->pBuffers); } icp_ocfDrvFreeMetaData(pDstBuffer); - kmem_cache_free(drvOpData_zone, temp_drvOpData); + ICP_CACHE_FREE(drvOpData_zone, temp_drvOpData); /* Invoke the OCF callback function */ crypto_done(crp); @@ -231,7 +200,8 @@ icp_ocfDrvSymCallBack(void *callbackTag, * Notes : LAC session registration happens during the first perform call. * That is the first time we know all information about a given session. */ -int icp_ocfDrvNewSession(device_t dev, uint32_t * sid, struct cryptoini *cri) +int icp_ocfDrvNewSession(icp_device_t dev, uint32_t * sid, + struct cryptoini *cri) { struct icp_drvSessionData *sessionData = NULL; uint32_t delete_session = 0; @@ -258,44 +228,44 @@ int icp_ocfDrvNewSession(device_t dev, uint32_t * sid, struct cryptoini *cri) return EINVAL; } - sessionData = kmem_cache_zalloc(drvSessionData_zone, GFP_ATOMIC); + sessionData = icp_kmem_cache_zalloc(drvSessionData_zone, ICP_M_NOWAIT); if (NULL == sessionData) { DPRINTK("%s():No memory for Session Data\n", __FUNCTION__); return ENOMEM; } /*ENTER CRITICAL SECTION */ - spin_lock_bh(&icp_ocfDrvSymSessInfoListSpinlock); + icp_spin_lockbh_lock(&icp_ocfDrvSymSessInfoListSpinlock); /*put this check in the spinlock so no new sessions can be added to the linked list when we are exiting */ - if (CPA_TRUE == atomic_read(&icp_ocfDrvIsExiting)) { + if (CPA_TRUE == icp_atomic_read(&icp_ocfDrvIsExiting)) { delete_session++; } else if (NO_OCF_TO_DRV_MAX_SESSIONS != max_sessions) { - if (atomic_read(&num_ocf_to_drv_registered_sessions) >= + if (icp_atomic_read(&num_ocf_to_drv_registered_sessions) >= (max_sessions - - atomic_read(&lac_session_failed_dereg_count))) { + icp_atomic_read(&lac_session_failed_dereg_count))) { delete_session++; } else { - atomic_inc(&num_ocf_to_drv_registered_sessions); + icp_atomic_inc(&num_ocf_to_drv_registered_sessions); /* Add to session data linked list */ - list_add(&(sessionData->listNode), - &icp_ocfDrvGlobalSymListHead); + ICP_LIST_ADD(sessionData, &icp_ocfDrvGlobalSymListHead, + listNode); } } else if (NO_OCF_TO_DRV_MAX_SESSIONS == max_sessions) { - list_add(&(sessionData->listNode), - &icp_ocfDrvGlobalSymListHead); + ICP_LIST_ADD(sessionData, &icp_ocfDrvGlobalSymListHead, + listNode); } sessionData->inUse = ICP_SESSION_INITIALISED; /*EXIT CRITICAL SECTION */ - spin_unlock_bh(&icp_ocfDrvSymSessInfoListSpinlock); + icp_spin_lockbh_unlock(&icp_ocfDrvSymSessInfoListSpinlock); if (delete_session) { DPRINTK("%s():No Session handles available\n", __FUNCTION__); - kmem_cache_free(drvSessionData_zone, sessionData); + ICP_CACHE_FREE(drvSessionData_zone, sessionData); return EPERM; } @@ -560,27 +530,27 @@ static void icp_ocfDrvFreeOCFSession(struct icp_drvSessionData *sessionData) sessionData->inUse = ICP_SESSION_DEREGISTERED; /*ENTER CRITICAL SECTION */ - spin_lock_bh(&icp_ocfDrvSymSessInfoListSpinlock); + icp_spin_lockbh_lock(&icp_ocfDrvSymSessInfoListSpinlock); - if (CPA_TRUE == atomic_read(&icp_ocfDrvIsExiting)) { + if (CPA_TRUE == icp_atomic_read(&icp_ocfDrvIsExiting)) { /*If the Driver is exiting, allow that process to handle any deletions */ /*EXIT CRITICAL SECTION */ - spin_unlock_bh(&icp_ocfDrvSymSessInfoListSpinlock); + icp_spin_lockbh_unlock(&icp_ocfDrvSymSessInfoListSpinlock); return; } - atomic_dec(&num_ocf_to_drv_registered_sessions); + icp_atomic_dec(&num_ocf_to_drv_registered_sessions); - list_del(&(sessionData->listNode)); + ICP_LIST_DEL(sessionData, listNode); /*EXIT CRITICAL SECTION */ - spin_unlock_bh(&icp_ocfDrvSymSessInfoListSpinlock); + icp_spin_lockbh_unlock(&icp_ocfDrvSymSessInfoListSpinlock); if (NULL != sessionData->sessHandle) { - kfree(sessionData->sessHandle); + icp_kfree(sessionData->sessHandle); } - kmem_cache_free(drvSessionData_zone, sessionData); + ICP_CACHE_FREE(drvSessionData_zone, sessionData); } /* Name : icp_ocfDrvFreeLACSession @@ -588,7 +558,7 @@ static void icp_ocfDrvFreeOCFSession(struct icp_drvSessionData *sessionData) * Description : This attempts to deregister a LAC session. If it fails, the * deregistation retry function is called. */ -int icp_ocfDrvFreeLACSession(device_t dev, uint64_t sid) +int icp_ocfDrvFreeLACSession(icp_device_t dev, uint64_t sid) { CpaCySymSessionCtx sessionToDeregister = NULL; struct icp_drvSessionData *sessionData = NULL; @@ -604,14 +574,14 @@ int icp_ocfDrvFreeLACSession(device_t dev, uint64_t sid) sessionToDeregister = sessionData->sessHandle; - if (ICP_SESSION_INITIALISED == sessionData->inUse) { - DPRINTK("%s() Session not registered with LAC\n", __FUNCTION__); - } else if (NULL == sessionData->sessHandle) { - EPRINTK - ("%s(): OCF Free session called with Null Session Handle.\n", - __FUNCTION__); + if ((ICP_SESSION_INITIALISED != sessionData->inUse) && + (ICP_SESSION_RUNNING != sessionData->inUse) && + (ICP_SESSION_DEREGISTERED != sessionData->inUse)) { + DPRINTK("%s() Session not initialised.\n", __FUNCTION__); return EINVAL; - } else { + } + + if (ICP_SESSION_RUNNING == sessionData->inUse) { lacStatus = cpaCySymRemoveSession(CPA_INSTANCE_HANDLE_SINGLE, sessionToDeregister); if (CPA_STATUS_RETRY == lacStatus) { @@ -629,9 +599,12 @@ int icp_ocfDrvFreeLACSession(device_t dev, uint64_t sid) DPRINTK("%s(): LAC failed to deregister the session. " "localSessionId= %p, lacStatus = %d\n", __FUNCTION__, sessionToDeregister, lacStatus); - atomic_inc(&lac_session_failed_dereg_count); + icp_atomic_inc(&lac_session_failed_dereg_count); retval = EPERM; } + } else { + DPRINTK("%s() Session not registered with LAC.\n", + __FUNCTION__); } icp_ocfDrvFreeOCFSession(sessionData); @@ -668,13 +641,12 @@ static int icp_ocfDrvAlgCheck(struct cryptodesc *crp_desc) * to whether session paramaters have changed (e.g. alg chain order) are * done. */ -int icp_ocfDrvSymProcess(device_t dev, struct cryptop *crp, int hint) +int icp_ocfDrvSymProcess(icp_device_t dev, struct cryptop *crp, int hint) { struct icp_drvSessionData *sessionData = NULL; struct icp_drvOpData *drvOpData = NULL; CpaStatus lacStatus = CPA_STATUS_SUCCESS; Cpa32U sessionCtxSizeInBytes = 0; - uint16_t numBufferListArray = 0; if (NULL == crp) { DPRINTK("%s(): Invalid input parameters, cryptop is NULL\n", @@ -696,7 +668,7 @@ int icp_ocfDrvSymProcess(device_t dev, struct cryptop *crp, int hint) return EINVAL; } - if (CPA_TRUE == atomic_read(&icp_ocfDrvIsExiting)) { + if (CPA_TRUE == icp_atomic_read(&icp_ocfDrvIsExiting)) { crp->crp_etype = EFAULT; return EFAULT; } @@ -793,14 +765,16 @@ int icp_ocfDrvSymProcess(device_t dev, struct cryptop *crp, int hint) if (CPA_STATUS_SUCCESS != lacStatus) { EPRINTK("%s(): cpaCySymSessionCtxGetSize failed - %d\n", __FUNCTION__, lacStatus); + crp->crp_etype = EINVAL; return EINVAL; } sessionData->sessHandle = - kmalloc(sessionCtxSizeInBytes, GFP_ATOMIC); + icp_kmalloc(sessionCtxSizeInBytes, ICP_M_NOWAIT); if (NULL == sessionData->sessHandle) { EPRINTK ("%s(): Failed to get memory for SymSessionCtx\n", __FUNCTION__); + crp->crp_etype = ENOMEM; return ENOMEM; } @@ -812,13 +786,14 @@ int icp_ocfDrvSymProcess(device_t dev, struct cryptop *crp, int hint) if (CPA_STATUS_SUCCESS != lacStatus) { EPRINTK("%s(): cpaCySymInitSession failed -%d \n", __FUNCTION__, lacStatus); + crp->crp_etype = EFAULT; return EFAULT; } sessionData->inUse = ICP_SESSION_RUNNING; } - drvOpData = kmem_cache_zalloc(drvOpData_zone, GFP_ATOMIC); + drvOpData = icp_kmem_cache_zalloc(drvOpData_zone, ICP_M_NOWAIT); if (NULL == drvOpData) { EPRINTK("%s():Failed to get memory for drvOpData\n", __FUNCTION__); @@ -835,28 +810,48 @@ int icp_ocfDrvSymProcess(device_t dev, struct cryptop *crp, int hint) drvOpData->srcBuffer.pBuffers = drvOpData->bufferListArray; drvOpData->numBufferListArray = ICP_OCF_DRV_DEFAULT_BUFFLIST_ARRAYS; + if (ICP_OCF_DRV_STATUS_SUCCESS != + icp_ocfDrvProcessDataSetup(drvOpData, drvOpData->crp->crp_desc)) { + crp->crp_etype = EINVAL; + goto err; + } + + if (drvOpData->crp->crp_desc->crd_next != NULL) { + if (icp_ocfDrvProcessDataSetup(drvOpData, drvOpData->crp-> + crp_desc->crd_next)) { + crp->crp_etype = EINVAL; + goto err; + } + + } + /* - * Allocate buffer list array memory allocation if the - * data fragment is more than the default allocation + * Allocate buffer list array memory if the data fragment is more than + * the default number (ICP_OCF_DRV_DEFAULT_BUFFLIST_ARRAYS) and not + * calculated already */ - if (crp->crp_flags & CRYPTO_F_SKBUF) { - numBufferListArray = icp_ocfDrvGetSkBuffFrags((struct sk_buff *) - crp->crp_buf); - if (ICP_OCF_DRV_DEFAULT_BUFFLIST_ARRAYS < numBufferListArray) { + if (crp->crp_flags & ICP_CRYPTO_F_PACKET_BUF) { + if (NULL == drvOpData->lacOpData.pDigestResult) { + drvOpData->numBufferListArray = + icp_ocfDrvGetPacketBuffFrags((icp_packet_buffer_t *) + crp->crp_buf); + } + + if (ICP_OCF_DRV_DEFAULT_BUFFLIST_ARRAYS < + drvOpData->numBufferListArray) { DPRINTK("%s() numBufferListArray more than default\n", __FUNCTION__); drvOpData->srcBuffer.pBuffers = NULL; drvOpData->srcBuffer.pBuffers = - kmalloc(numBufferListArray * - sizeof(CpaFlatBuffer), GFP_ATOMIC); + icp_kmalloc(drvOpData->numBufferListArray * + sizeof(CpaFlatBuffer), ICP_M_NOWAIT); if (NULL == drvOpData->srcBuffer.pBuffers) { EPRINTK("%s() Failed to get memory for " "pBuffers\n", __FUNCTION__); - kmem_cache_free(drvOpData_zone, drvOpData); + ICP_CACHE_FREE(drvOpData_zone, drvOpData); crp->crp_etype = ENOMEM; return ENOMEM; } - drvOpData->numBufferListArray = numBufferListArray; } } @@ -864,17 +859,18 @@ int icp_ocfDrvSymProcess(device_t dev, struct cryptop *crp, int hint) * Check the type of buffer structure we got and convert it into * CpaBufferList format. */ - if (crp->crp_flags & CRYPTO_F_SKBUF) { + if (crp->crp_flags & ICP_CRYPTO_F_PACKET_BUF) { if (ICP_OCF_DRV_STATUS_SUCCESS != - icp_ocfDrvSkBuffToBufferList((struct sk_buff *)crp->crp_buf, - &(drvOpData->srcBuffer))) { - EPRINTK("%s():Failed to translate from SK_BUF " + icp_ocfDrvPacketBuffToBufferList((icp_packet_buffer_t *) + crp->crp_buf, + &(drvOpData->srcBuffer))) { + EPRINTK("%s():Failed to translate from packet buffer " "to bufferlist\n", __FUNCTION__); crp->crp_etype = EINVAL; goto err; } - drvOpData->bufferType = CRYPTO_F_SKBUF; + drvOpData->bufferType = ICP_CRYPTO_F_PACKET_BUF; } else if (crp->crp_flags & CRYPTO_F_IOV) { /* OCF only supports IOV of one entry. */ if (NUM_IOV_SUPPORTED == @@ -906,21 +902,6 @@ int icp_ocfDrvSymProcess(device_t dev, struct cryptop *crp, int hint) drvOpData->bufferType = CRYPTO_BUF_CONTIG; } - if (ICP_OCF_DRV_STATUS_SUCCESS != - icp_ocfDrvProcessDataSetup(drvOpData, drvOpData->crp->crp_desc)) { - crp->crp_etype = EINVAL; - goto err; - } - - if (drvOpData->crp->crp_desc->crd_next != NULL) { - if (icp_ocfDrvProcessDataSetup(drvOpData, drvOpData->crp-> - crp_desc->crd_next)) { - crp->crp_etype = EINVAL; - goto err; - } - - } - /* Allocate srcBuffer's private meta data */ if (ICP_OCF_DRV_STATUS_SUCCESS != icp_ocfDrvAllocMetaData(&(drvOpData->srcBuffer), drvOpData)) { @@ -941,7 +922,7 @@ int icp_ocfDrvSymProcess(device_t dev, struct cryptop *crp, int hint) DPRINTK("%s(): cpaCySymPerformOp retry, lacStatus = %d\n", __FUNCTION__, lacStatus); memset(&(drvOpData->lacOpData), 0, sizeof(CpaCySymOpData)); - crp->crp_etype = EINVAL; + crp->crp_etype = ERESTART; goto err; } if (CPA_STATUS_SUCCESS != lacStatus) { @@ -956,10 +937,10 @@ int icp_ocfDrvSymProcess(device_t dev, struct cryptop *crp, int hint) err: if (drvOpData->numBufferListArray > ICP_OCF_DRV_DEFAULT_BUFFLIST_ARRAYS) { - kfree(drvOpData->srcBuffer.pBuffers); + icp_kfree(drvOpData->srcBuffer.pBuffers); } icp_ocfDrvFreeMetaData(&(drvOpData->srcBuffer)); - kmem_cache_free(drvOpData_zone, drvOpData); + ICP_CACHE_FREE(drvOpData_zone, drvOpData); return crp->crp_etype; } @@ -1129,32 +1110,20 @@ static int icp_ocfDrvProcessDataSetup(struct icp_drvOpData *drvOpData, * must be traversed by the data length offset in order to find the digest start * address. Whether there is enough space for the digest must also be checked. */ - -static uint8_t *icp_ocfDrvDigestPointerFind(struct icp_drvOpData *drvOpData, - struct cryptodesc *crp_desc) +uint8_t *icp_ocfDrvDigestPointerFind(struct icp_drvOpData * drvOpData, + struct cryptodesc * crp_desc) { int offsetInBytes = crp_desc->crd_inject; uint32_t digestSizeInBytes = drvOpData->digestSizeInBytes; uint8_t *flat_buffer_base = NULL; int flat_buffer_length = 0; - struct sk_buff *skb; - if (drvOpData->crp->crp_flags & CRYPTO_F_SKBUF) { - /*check if enough overall space to store hash */ - skb = (struct sk_buff *)(drvOpData->crp->crp_buf); - - if (skb->len < (offsetInBytes + digestSizeInBytes)) { - DPRINTK("%s() Not enough space for Digest" - " payload after the offset (%d), " - "digest size (%d) \n", __FUNCTION__, - offsetInBytes, digestSizeInBytes); - return NULL; - } + if (drvOpData->crp->crp_flags & ICP_CRYPTO_F_PACKET_BUF) { - return icp_ocfDrvSkbuffDigestPointerFind(drvOpData, - offsetInBytes, - digestSizeInBytes); + return icp_ocfDrvPacketBufferDigestPointerFind(drvOpData, + offsetInBytes, + digestSizeInBytes); } else { /* IOV or flat buffer */ @@ -1182,201 +1151,3 @@ static uint8_t *icp_ocfDrvDigestPointerFind(struct icp_drvOpData *drvOpData, DPRINTK("%s() Should not reach this point\n", __FUNCTION__); return NULL; } - -/* Name : icp_ocfDrvSkbuffDigestPointerFind - * - * Description : This function is used by icp_ocfDrvDigestPointerFind to process - * the non-linear portion of the skbuff if the fragmentation type is a linked - * list (frag_list is not NULL in the skb_shared_info structure) - */ -static inline uint8_t *icp_ocfDrvSkbuffDigestPointerFind(struct icp_drvOpData - *drvOpData, - int offsetInBytes, - uint32_t - digestSizeInBytes) -{ - - struct sk_buff *skb = NULL; - struct skb_shared_info *skb_shared = NULL; - - uint32_t skbuffisnonlinear = 0; - - uint32_t skbheadlen = 0; - - skb = (struct sk_buff *)(drvOpData->crp->crp_buf); - skbuffisnonlinear = skb_is_nonlinear(skb); - - skbheadlen = skb_headlen(skb); - - /*Linear skb checks */ - if (skbheadlen > offsetInBytes) { - - if (skbheadlen >= (offsetInBytes + digestSizeInBytes)) { - return (uint8_t *) (skb->data + offsetInBytes); - } else { - DPRINTK("%s() Auth payload stretches " - "accross contiguous memory\n", __FUNCTION__); - return NULL; - } - } else { - if (skbuffisnonlinear) { - offsetInBytes -= skbheadlen; - } else { - DPRINTK("%s() Offset outside of buffer boundaries\n", - __FUNCTION__); - return NULL; - } - } - - /*Non Linear checks */ - skb_shared = (struct skb_shared_info *)(skb->end); - if (unlikely(NULL == skb_shared)) { - DPRINTK("%s() skbuff shared info stucture is NULL! \n", - __FUNCTION__); - return NULL; - } else if ((0 != skb_shared->nr_frags) && - (skb_shared->frag_list != NULL)) { - DPRINTK("%s() skbuff nr_frags AND " - "frag_list not supported \n", __FUNCTION__); - return NULL; - } - - /*TCP segmentation more likely than IP fragmentation */ - if (likely(0 != skb_shared->nr_frags)) { - return icp_ocfDrvDigestSkbNRFragsCheck(skb, skb_shared, - offsetInBytes, - digestSizeInBytes); - } else if (skb_shared->frag_list != NULL) { - return icp_ocfDrvDigestSkbFragListCheck(skb, skb_shared, - offsetInBytes, - digestSizeInBytes); - } else { - DPRINTK("%s() skbuff is non-linear but does not show any " - "linked data\n", __FUNCTION__); - return NULL; - } - -} - -/* Name : icp_ocfDrvDigestSkbNRFragsCheck - * - * Description : This function is used by icp_ocfDrvSkbuffDigestPointerFind to - * process the non-linear portion of the skbuff, if the fragmentation type is - * page fragments - */ -static inline uint8_t *icp_ocfDrvDigestSkbNRFragsCheck(struct sk_buff *skb, - struct skb_shared_info - *skb_shared, - int offsetInBytes, - uint32_t - digestSizeInBytes) -{ - int i = 0; - /*nr_frags starts from 1 */ - if (MAX_SKB_FRAGS < skb_shared->nr_frags) { - DPRINTK("%s error processing skbuff " - "page frame -- MAX FRAGS exceeded \n", __FUNCTION__); - return NULL; - } - - for (i = 0; i < skb_shared->nr_frags; i++) { - - if (offsetInBytes >= skb_shared->frags[i].size) { - /*offset still greater than data position */ - offsetInBytes -= skb_shared->frags[i].size; - } else { - /* found the page containing start of hash */ - - if (NULL == skb_shared->frags[i].page) { - DPRINTK("%s() Linked page is NULL!\n", - __FUNCTION__); - return NULL; - } - - if (offsetInBytes + digestSizeInBytes > - skb_shared->frags[i].size) { - DPRINTK("%s() Auth payload stretches accross " - "contiguous memory\n", __FUNCTION__); - return NULL; - } else { - return (uint8_t *) (skb_shared->frags[i].page + - skb_shared->frags[i]. - page_offset + - offsetInBytes); - } - } - /*only possible if internal page sizes are set wrong */ - if (offsetInBytes < 0) { - DPRINTK("%s error processing skbuff page frame " - "-- offset calculation \n", __FUNCTION__); - return NULL; - } - } - /*only possible if internal page sizes are set wrong */ - DPRINTK("%s error processing skbuff page frame " - "-- ran out of page fragments, remaining offset = %d \n", - __FUNCTION__, offsetInBytes); - return NULL; - -} - -/* Name : icp_ocfDrvDigestSkbFragListCheck - * - * Description : This function is used by icp_ocfDrvSkbuffDigestPointerFind to - * process the non-linear portion of the skbuff, if the fragmentation type is - * a linked list - * - */ -static inline uint8_t *icp_ocfDrvDigestSkbFragListCheck(struct sk_buff *skb, - struct skb_shared_info - *skb_shared, - int offsetInBytes, - uint32_t - digestSizeInBytes) -{ - - struct sk_buff *skb_list = skb_shared->frag_list; - /*check added for readability */ - if (NULL == skb_list) { - DPRINTK("%s error processing skbuff " - "-- no more list! \n", __FUNCTION__); - return NULL; - } - - for (; skb_list; skb_list = skb_list->next) { - if (NULL == skb_list) { - DPRINTK("%s error processing skbuff " - "-- no more list! \n", __FUNCTION__); - return NULL; - } - - if (offsetInBytes >= skb_list->len) { - offsetInBytes -= skb_list->len; - - } else { - if (offsetInBytes + digestSizeInBytes > skb_list->len) { - DPRINTK("%s() Auth payload stretches accross " - "contiguous memory\n", __FUNCTION__); - return NULL; - } else { - return (uint8_t *) - (skb_list->data + offsetInBytes); - } - - } - - /*This check is only needed if internal skb_list length values - are set wrong. */ - if (0 > offsetInBytes) { - DPRINTK("%s() error processing skbuff object -- offset " - "calculation \n", __FUNCTION__); - return NULL; - } - - } - - /*catch all for unusual for-loop exit. - This code should never be reached */ - DPRINTK("%s() Catch-All hit! Process error.\n", __FUNCTION__); - return NULL; -} |