[CIFS] CIFS readdir perf optimizations part 1

Signed-off-by: NSteve French <sfrench@us.ibm.com>

fs/cifs/cifssmb.c

@@ -3026,6 +3026,7 @@ CIFSFindFirst(const int xid, struct cifsTconInfo *tcon,
 				psrch_inf->unicode = FALSE;
 
 			psrch_inf->ntwrk_buf_start = (char *)pSMBr;
+			psrch_inf->smallBuf = 0;
 			psrch_inf->srch_entries_start = 
 				(char *) &pSMBr->hdr.Protocol + 
 					le16_to_cpu(pSMBr->t2.DataOffset);
@@ -3146,9 +3147,14 @@ int CIFSFindNext(const int xid, struct cifsTconInfo *tcon,
 			parms = (T2_FNEXT_RSP_PARMS *)response_data;
 			response_data = (char *)&pSMBr->hdr.Protocol +
 				le16_to_cpu(pSMBr->t2.DataOffset);
-			cifs_buf_release(psrch_inf->ntwrk_buf_start);
+			if(psrch_inf->smallBuf)
+				cifs_small_buf_release(
+					psrch_inf->ntwrk_buf_start);
+			else
+				cifs_buf_release(psrch_inf->ntwrk_buf_start);
 			psrch_inf->srch_entries_start = response_data;
 			psrch_inf->ntwrk_buf_start = (char *)pSMB;
+			psrch_inf->smallBuf = 0;
 			if(parms->EndofSearch)
 				psrch_inf->endOfSearch = TRUE;
 			else

fs/cifs/file.c

@@ -555,7 +555,10 @@ int cifs_closedir(struct inode *inode, struct file *file)
 		if (ptmp) {
 			cFYI(1, ("closedir free smb buf in srch struct"));
 			pCFileStruct->srch_inf.ntwrk_buf_start = NULL;
-			cifs_buf_release(ptmp);
+			if(pCFileStruct->srch_inf.smallBuf)
+				cifs_small_buf_release(ptmp);
+			else
+				cifs_buf_release(ptmp);
 		}
 		ptmp = pCFileStruct->search_resume_name;
 		if (ptmp) {
@@ -592,11 +595,11 @@ int cifs_lock(struct file *file, int cmd, struct file_lock *pfLock)
 	        pfLock->fl_end));
 
 	if (pfLock->fl_flags & FL_POSIX)
-		cFYI(1, ("Posix "));
+		cFYI(1, ("Posix"));
 	if (pfLock->fl_flags & FL_FLOCK)
-		cFYI(1, ("Flock "));
+		cFYI(1, ("Flock"));
 	if (pfLock->fl_flags & FL_SLEEP) {
-		cFYI(1, ("Blocking lock "));
+		cFYI(1, ("Blocking lock"));
 		wait_flag = TRUE;
 	}
 	if (pfLock->fl_flags & FL_ACCESS)
@@ -612,21 +615,23 @@ int cifs_lock(struct file *file, int cmd, struct file_lock *pfLock)
 		cFYI(1, ("F_WRLCK "));
 		numLock = 1;
 	} else if (pfLock->fl_type == F_UNLCK) {
-		cFYI(1, ("F_UNLCK "));
+		cFYI(1, ("F_UNLCK"));
 		numUnlock = 1;
+		/* Check if unlock includes more than
+		one lock range */
 	} else if (pfLock->fl_type == F_RDLCK) {
-		cFYI(1, ("F_RDLCK "));
+		cFYI(1, ("F_RDLCK"));
 		lockType |= LOCKING_ANDX_SHARED_LOCK;
 		numLock = 1;
 	} else if (pfLock->fl_type == F_EXLCK) {
-		cFYI(1, ("F_EXLCK "));
+		cFYI(1, ("F_EXLCK"));
 		numLock = 1;
 	} else if (pfLock->fl_type == F_SHLCK) {
-		cFYI(1, ("F_SHLCK "));
+		cFYI(1, ("F_SHLCK"));
 		lockType |= LOCKING_ANDX_SHARED_LOCK;
 		numLock = 1;
 	} else
-		cFYI(1, ("Unknown type of lock "));
+		cFYI(1, ("Unknown type of lock"));
 
 	cifs_sb = CIFS_SB(file->f_dentry->d_sb);
 	pTcon = cifs_sb->tcon;

fs/cifs/readdir.c

@@ -604,7 +604,12 @@ static int find_cifs_entry(const int xid, struct cifsTconInfo *pTcon,
 		cifsFile->search_resume_name = NULL;
 		if(cifsFile->srch_inf.ntwrk_buf_start) {
 			cFYI(1,("freeing SMB ff cache buf on search rewind"));
-			cifs_buf_release(cifsFile->srch_inf.ntwrk_buf_start);
+			if(cifsFile->srch_inf.smallBuf)
+				cifs_small_buf_release(cifsFile->srch_inf.
+						ntwrk_buf_start);
+			else
+				cifs_buf_release(cifsFile->srch_inf.
+						ntwrk_buf_start);
 		}
 		rc = initiate_cifs_search(xid,file);
 		if(rc) {