r19504: - fixed a free error in file_lines_parse

- added a function to test for large file support

- enable CAP_LARGE_FILES only if the test passes

- don't test at large offsets if the server doesn't set
  CAP_LARGE_FILES
(This used to be commit c5423ea22bdaa055807d4e6f7ac4be934194fe45)

4 files changed, 41 insertions, 15 deletions

diff --git a/source4/lib/util/util_file.c b/source4/lib/util/util_file.c
index 34517120533..5d7ec40b309 100644
--- a/source4/lib/util/util_file.c
+++ b/source4/lib/util/util_file.c
@@ -241,6 +241,7 @@ _PUBLIC_ void *map_file(const char *fname, size_t size)
 
 /**
 parse a buffer into lines
+'p' will be freed on error, and otherwise will be made a child of the returned array
 **/
 static char **file_lines_parse(char *p, size_t size, int *numlines, TALLOC_CTX *mem_ctx)
 {
@@ -259,7 +260,7 @@ static char **file_lines_parse(char *p, size_t size, int *numlines, TALLOC_CTX *
 		return NULL;
 	}	
 	
-	talloc_reference(ret, p);
+	talloc_steal(ret, p);
 	
 	memset(ret, 0, sizeof(ret[0])*(i+2));
 	if (numlines) *numlines = i;
@@ -285,17 +286,12 @@ must be freed with talloc_free().
 _PUBLIC_ char **file_lines_load(const char *fname, int *numlines, TALLOC_CTX *mem_ctx)
 {
 	char *p;
-	char **lines;
 	size_t size;
 
 	p = file_load(fname, &size, mem_ctx);
 	if (!p) return NULL;
 
-	lines = file_lines_parse(p, size, numlines, mem_ctx);
-
-	talloc_free(p);
-
-	return lines;
+	return file_lines_parse(p, size, numlines, mem_ctx);
 }
 
 /**
@@ -306,17 +302,12 @@ the list.
 _PUBLIC_ char **fd_lines_load(int fd, int *numlines, TALLOC_CTX *mem_ctx)
 {
 	char *p;
-	char **lines;
 	size_t size;
 
 	p = fd_load(fd, &size, mem_ctx);
 	if (!p) return NULL;
 
-	lines = file_lines_parse(p, size, numlines, mem_ctx);
-
-	talloc_free(p);
-
-	return lines;
+	return file_lines_parse(p, size, numlines, mem_ctx);
 }
 
 
@@ -385,3 +376,24 @@ _PUBLIC_ int fdprintf(int fd, const char *format, ...) _PRINTF_ATTRIBUTE(2,3)
 	va_end(ap);
 	return ret;
 }
+
+
+/*
+  try to determine if the filesystem supports large files
+*/
+_PUBLIC_ bool large_file_support(const char *path)
+{
+	int fd;
+	ssize_t ret;
+	char c;
+
+	fd = open(path, O_RDWR|O_CREAT, 0600);
+	unlink(path);
+	if (fd == -1) {
+		/* have to assume large files are OK */
+		return true;
+	}
+	ret = pread(fd, &c, 1, ((uint64_t)1)<<32);
+	close(fd);
+	return ret == 0;
+}
diff --git a/source4/smb_server/smb/negprot.c b/source4/smb_server/smb/negprot.c
index 25684bee276..4aecca53baa 100644
--- a/source4/smb_server/smb/negprot.c
+++ b/source4/smb_server/smb/negprot.c
@@ -250,6 +250,7 @@ static void reply_nt1(struct smbsrv_request *req, uint16_t choice)
 	time_t t = req->request_time.tv_sec;
 	NTTIME nttime;
 	BOOL negotiate_spnego = False;
+	char *large_test_path;
 
 	unix_to_nt_time(&nttime, t);
 
@@ -277,8 +278,11 @@ static void reply_nt1(struct smbsrv_request *req, uint16_t choice)
 	if (lp_large_readwrite()) {
 		capabilities |= CAP_LARGE_READX | CAP_LARGE_WRITEX | CAP_W2K_SMBS;
 	}
-	
-	capabilities |= CAP_LARGE_FILES;
+
+	large_test_path = lock_path(req, "large_test.dat");
+	if (large_file_support(large_test_path)) {
+		capabilities |= CAP_LARGE_FILES;
+	}
 
 	if (lp_readraw() && lp_writeraw()) {
 		capabilities |= CAP_RAW_MODE;
diff --git a/source4/torture/raw/read.c b/source4/torture/raw/read.c
index bb27ba71e58..f9c44e036e0 100644
--- a/source4/torture/raw/read.c
+++ b/source4/torture/raw/read.c
@@ -522,6 +522,11 @@ static BOOL test_readx(struct smbcli_state *cli, TALLOC_CTX *mem_ctx)
 	status = smb_raw_read(cli->tree, &io);
 	CHECK_STATUS(status, NT_STATUS_FILE_LOCK_CONFLICT);	
 
+	if (!(cli->transport->negotiate.capabilities & CAP_LARGE_FILES)) {
+		printf("skipping large file tests - CAP_LARGE_FILES not set\n");
+		goto done;
+	}
+
 	printf("Trying large offset read\n");
 	io.readx.in.offset = ((uint64_t)0x2) << 32;
 	io.readx.in.mincnt = 10;
diff --git a/source4/torture/raw/write.c b/source4/torture/raw/write.c
index 03c3897c744..046ca8c4f99 100644
--- a/source4/torture/raw/write.c
+++ b/source4/torture/raw/write.c
@@ -182,6 +182,11 @@ static BOOL test_write(struct smbcli_state *cli, TALLOC_CTX *mem_ctx)
 	printf("Setting file as sparse\n");
 	status = torture_set_sparse(cli->tree, fnum);
 	CHECK_STATUS(status, NT_STATUS_OK);
+
+	if (!(cli->transport->negotiate.capabilities & CAP_LARGE_FILES)) {
+		printf("skipping large file tests - CAP_LARGE_FILES not set\n");
+		goto done;
+	}
 	
 	printf("Trying 2^32 offset\n");
 	setup_buffer(buf, seed, maxsize);