From: Steve French Date: Fri, 2 Dec 2005 21:32:45 +0000 (-0800) Subject: [CIFS] Readpages and readir performance improvements - eliminate extra X-Git-Tag: firefly_0821_release~38626^2~17 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=84afc29b185334f489975a003b128e1b15e24a54;p=firefly-linux-kernel-4.4.55.git [CIFS] Readpages and readir performance improvements - eliminate extra memcpy. Part 1 Signed-off-by: Steve French --- diff --git a/fs/cifs/CHANGES b/fs/cifs/CHANGES index 8bef2f3a4130..1d2137561c55 100644 --- a/fs/cifs/CHANGES +++ b/fs/cifs/CHANGES @@ -1,6 +1,7 @@ Version 1.40 ------------ -Use fsuid (fsgid) more consistently instead of uid (gid). +Use fsuid (fsgid) more consistently instead of uid (gid). Improve performance +of readpages by eliminating one extra memcpy. Version 1.39 ------------ diff --git a/fs/cifs/cifsencrypt.c b/fs/cifs/cifsencrypt.c index fe2bb7c4c912..a2c24858d40f 100644 --- a/fs/cifs/cifsencrypt.c +++ b/fs/cifs/cifsencrypt.c @@ -1,7 +1,7 @@ /* * fs/cifs/cifsencrypt.c * - * Copyright (C) International Business Machines Corp., 2003 + * Copyright (C) International Business Machines Corp., 2005 * Author(s): Steve French (sfrench@us.ibm.com) * * This library is free software; you can redistribute it and/or modify @@ -82,6 +82,59 @@ int cifs_sign_smb(struct smb_hdr * cifs_pdu, struct TCP_Server_Info * server, return rc; } +static int cifs_calc_signature2(const struct kvec * iov, int n_vec, + const char * key, char * signature) +{ + struct MD5Context context; + + if((iov == NULL) || (signature == NULL)) + return -EINVAL; + + MD5Init(&context); + MD5Update(&context,key,CIFS_SESSION_KEY_SIZE+16); + +/* MD5Update(&context,cifs_pdu->Protocol,cifs_pdu->smb_buf_length); */ /* BB FIXME BB */ + + MD5Final(signature,&context); + + return -EOPNOTSUPP; +/* return 0; */ +} + + +int cifs_sign_smb2(struct kvec * iov, int n_vec, struct TCP_Server_Info *server, + __u32 * pexpected_response_sequence_number) +{ + int rc = 0; + char smb_signature[20]; + struct smb_hdr * cifs_pdu = iov[0].iov_base; + + if((cifs_pdu == NULL) || (server == NULL)) + return -EINVAL; + + if((cifs_pdu->Flags2 & SMBFLG2_SECURITY_SIGNATURE) == 0) + return rc; + + spin_lock(&GlobalMid_Lock); + cifs_pdu->Signature.Sequence.SequenceNumber = + cpu_to_le32(server->sequence_number); + cifs_pdu->Signature.Sequence.Reserved = 0; + + *pexpected_response_sequence_number = server->sequence_number++; + server->sequence_number++; + spin_unlock(&GlobalMid_Lock); + + rc = cifs_calc_signature2(iov, n_vec, server->mac_signing_key, + smb_signature); + if(rc) + memset(cifs_pdu->Signature.SecuritySignature, 0, 8); + else + memcpy(cifs_pdu->Signature.SecuritySignature, smb_signature, 8); + + return rc; + +} + int cifs_verify_signature(struct smb_hdr * cifs_pdu, const char * mac_key, __u32 expected_sequence_number) { diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h index 1b73f4f4c5ce..c058f8a45b2b 100644 --- a/fs/cifs/cifsproto.h +++ b/fs/cifs/cifsproto.h @@ -48,7 +48,7 @@ extern int SendReceive(const unsigned int /* xid */ , struct cifsSesInfo *, struct smb_hdr * /* out */ , int * /* bytes returned */ , const int long_op); extern int SendReceive2(const unsigned int /* xid */ , struct cifsSesInfo *, - struct kvec *, int /* nvec */, + struct kvec *, int /* nvec to send */, int * /* bytes returned */ , const int long_op); extern int checkSMBhdr(struct smb_hdr *smb, __u16 mid); extern int checkSMB(struct smb_hdr *smb, __u16 mid, int length); @@ -237,12 +237,10 @@ extern int CIFSSMBWrite(const int xid, struct cifsTconInfo *tcon, const __u64 lseek, unsigned int *nbytes, const char *buf, const char __user *ubuf, const int long_op); -#ifdef CONFIG_CIFS_EXPERIMENTAL extern int CIFSSMBWrite2(const int xid, struct cifsTconInfo *tcon, const int netfid, const unsigned int count, const __u64 offset, unsigned int *nbytes, struct kvec *iov, const int nvec, const int long_op); -#endif /* CONFIG_CIFS_EXPERIMENTAL */ extern int CIFSGetSrvInodeNumber(const int xid, struct cifsTconInfo *tcon, const unsigned char *searchName, __u64 * inode_number, const struct nls_table *nls_codepage, @@ -269,6 +267,8 @@ extern void tconInfoFree(struct cifsTconInfo *); extern int cifs_reconnect(struct TCP_Server_Info *server); extern int cifs_sign_smb(struct smb_hdr *, struct TCP_Server_Info *,__u32 *); +extern int cifs_sign_smb2(struct kvec *iov, int n_vec, struct TCP_Server_Info *, + __u32 *); extern int cifs_verify_signature(struct smb_hdr *, const char * mac_key, __u32 expected_sequence_number); extern int cifs_calculate_mac_key(char * key,const char * rn,const char * pass); diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c index 6867e556d37e..3565d3bf2e32 100644 --- a/fs/cifs/cifssmb.c +++ b/fs/cifs/cifssmb.c @@ -1155,7 +1155,6 @@ CIFSSMBWrite(const int xid, struct cifsTconInfo *tcon, return rc; } -#ifdef CONFIG_CIFS_EXPERIMENTAL int CIFSSMBWrite2(const int xid, struct cifsTconInfo *tcon, const int netfid, const unsigned int count, @@ -1223,7 +1222,7 @@ CIFSSMBWrite2(const int xid, struct cifsTconInfo *tcon, *nbytes = le16_to_cpu(pSMBr->CountHigh); *nbytes = (*nbytes) << 16; *nbytes += le16_to_cpu(pSMBr->Count); - } + } cifs_small_buf_release(pSMB); @@ -1234,8 +1233,6 @@ CIFSSMBWrite2(const int xid, struct cifsTconInfo *tcon, } -#endif /* CIFS_EXPERIMENTAL */ - int CIFSSMBLock(const int xid, struct cifsTconInfo *tcon, const __u16 smb_file_id, const __u64 len, diff --git a/fs/cifs/file.c b/fs/cifs/file.c index 14a1c72ced92..b67be3d8c019 100644 --- a/fs/cifs/file.c +++ b/fs/cifs/file.c @@ -870,7 +870,6 @@ static ssize_t cifs_write(struct file *file, const char *write_data, if (rc != 0) break; } -#ifdef CONFIG_CIFS_EXPERIMENTAL /* BB FIXME We can not sign across two buffers yet */ if((experimEnabled) && ((pTcon->ses->server->secMode & (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) == 0)) { @@ -889,7 +888,6 @@ static ssize_t cifs_write(struct file *file, const char *write_data, iov, 1, long_op); } else /* BB FIXME fixup indentation of line below */ -#endif rc = CIFSSMBWrite(xid, pTcon, open_file->netfid, min_t(const int, cifs_sb->wsize, @@ -1026,7 +1024,6 @@ static int cifs_partialpagewrite(struct page *page, unsigned from, unsigned to) return rc; } -#ifdef CONFIG_CIFS_EXPERIMENTAL static int cifs_writepages(struct address_space *mapping, struct writeback_control *wbc) { @@ -1229,7 +1226,6 @@ retry: return rc; } -#endif static int cifs_writepage(struct page* page, struct writeback_control *wbc) { @@ -1875,9 +1871,7 @@ struct address_space_operations cifs_addr_ops = { .readpage = cifs_readpage, .readpages = cifs_readpages, .writepage = cifs_writepage, -#ifdef CONFIG_CIFS_EXPERIMENTAL .writepages = cifs_writepages, -#endif .prepare_write = cifs_prepare_write, .commit_write = cifs_commit_write, .set_page_dirty = __set_page_dirty_nobuffers, diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c index f8871196098c..0abfbf4e4a49 100644 --- a/fs/cifs/transport.c +++ b/fs/cifs/transport.c @@ -206,7 +206,6 @@ smb_send(struct socket *ssocket, struct smb_hdr *smb_buffer, return rc; } -#ifdef CONFIG_CIFS_EXPERIMENTAL static int smb_send2(struct socket *ssocket, struct kvec *iov, int n_vec, struct sockaddr *sin) @@ -392,8 +391,7 @@ SendReceive2(const unsigned int xid, struct cifsSesInfo *ses, return -ENOMEM; } -/* BB FIXME */ -/* rc = cifs_sign_smb2(iov, n_vec, ses->server, &midQ->sequence_number); */ + rc = cifs_sign_smb2(iov, n_vec, ses->server, &midQ->sequence_number); midQ->midState = MID_REQUEST_SUBMITTED; #ifdef CONFIG_CIFS_STATS2 @@ -492,11 +490,17 @@ SendReceive2(const unsigned int xid, struct cifsSesInfo *ses, if (midQ->resp_buf && (midQ->midState == MID_RESPONSE_RECEIVED)) { + in_buf->smb_buf_length = receive_len; - /* BB verify that length would not overrun small buf */ - memcpy((char *)in_buf + 4, - (char *)midQ->resp_buf + 4, - receive_len); + if(receive_len > 500) { + /* use multiple buffers on way out */ + } else { + memcpy((char *)in_buf + 4, + (char *)midQ->resp_buf + 4, + receive_len); + iov[0].iov_len = receive_len + 4; + iov[1].iov_len = 0; + } dump_smb(in_buf, 80); /* convert the length into a more usable form */ @@ -549,7 +553,6 @@ out_unlock2: return rc; } -#endif /* CIFS_EXPERIMENTAL */ int SendReceive(const unsigned int xid, struct cifsSesInfo *ses,