s3:gpfs: Add support for the gpfs_ftruncate call

ported from the v3-4-ctdb branch to master
This used to be commit 1f138cc9f4a

Autobuild-User: Volker Lendecke <vlendec@samba.org>
Autobuild-Date: Wed Oct 13 13:34:25 UTC 2010 on sn-devel-104

3 files changed, 28 insertions, 2 deletions

diff --git a/source3/modules/gpfs.c b/source3/modules/gpfs.c
index c8fb88d92e..cad765e966 100644
--- a/source3/modules/gpfs.c
+++ b/source3/modules/gpfs.c
@@ -26,6 +26,7 @@
 
 static bool gpfs_getrealfilename;
 static bool gpfs_winattr;
+static bool gpfs_do_ftruncate;
 
 static int (*gpfs_set_share_fn)(int fd, unsigned int allow, unsigned int deny);
 static int (*gpfs_set_lease_fn)(int fd, unsigned int leaseType);
@@ -36,7 +37,7 @@ static int (*gpfs_get_realfilename_path_fn)(char *pathname, char *filenamep,
 static int (*gpfs_set_winattrs_path_fn)(char *pathname, int flags, struct gpfs_winattr *attrs);
 static int (*gpfs_get_winattrs_path_fn)(char *pathname, struct gpfs_winattr *attrs);
 static int (*gpfs_get_winattrs_fn)(int fd, struct gpfs_winattr *attrs);
-
+static int (*gpfs_ftruncate_fn)(int fd, gpfs_off64_t length);
 
 bool set_gpfs_sharemode(files_struct *fsp, uint32 access_mask,
 			uint32 share_access)
@@ -131,6 +132,16 @@ int smbd_gpfs_putacl(char *pathname, int flags, void *acl)
 	return gpfs_putacl_fn(pathname, flags, acl);
 }
 
+int smbd_gpfs_ftruncate(int fd, gpfs_off64_t length)
+{
+	if (!gpfs_do_ftruncate || (gpfs_ftruncate_fn == NULL)) {
+		errno = ENOSYS;
+		return -1;
+	}
+
+	return gpfs_ftruncate_fn(fd, length);
+}
+
 int smbd_gpfs_get_realfilename_path(char *pathname, char *filenamep,
 				    int *buflen)
 {
@@ -237,11 +248,12 @@ void init_gpfs(void)
 	init_gpfs_function(&gpfs_get_winattrs_path_fn,"gpfs_get_winattrs_path");
         init_gpfs_function(&gpfs_set_winattrs_path_fn,"gpfs_set_winattrs_path");
         init_gpfs_function(&gpfs_get_winattrs_fn,"gpfs_get_winattrs");
-
+	init_gpfs_function(&gpfs_ftruncate_fn, "gpfs_ftruncate");
 
 	gpfs_getrealfilename = lp_parm_bool(-1, "gpfs", "getrealfilename",
 					    True);
 	gpfs_winattr = lp_parm_bool(-1, "gpfs", "winattr", False);
+	gpfs_do_ftruncate = lp_parm_bool(-1, "gpfs", "ftruncate", True);
 
 	return;
 }
diff --git a/source3/modules/vfs_gpfs.c b/source3/modules/vfs_gpfs.c
index be035a83bc..8fbfbdfa9b 100644
--- a/source3/modules/vfs_gpfs.c
+++ b/source3/modules/vfs_gpfs.c
@@ -1128,6 +1128,18 @@ static int vfs_gpfs_ntimes(struct vfs_handle_struct *handle,
 
 }
 
+static int vfs_gpfs_ftruncate(vfs_handle_struct *handle, files_struct *fsp,
+				SMB_OFF_T len)
+{
+	int result;
+
+	result = smbd_gpfs_ftruncate(fsp->fh->fd, len);
+	if ((result == -1) && (errno == ENOSYS)) {
+		return SMB_VFS_NEXT_FTRUNCATE(handle, fsp, len);
+	}
+	return result;
+}
+
 int vfs_gpfs_connect(struct vfs_handle_struct *handle, const char *service,
 			const char *user)
 {
@@ -1180,6 +1192,7 @@ static struct vfs_fn_pointers vfs_gpfs_fns = {
         .fstat = vfs_gpfs_fstat,
         .lstat = vfs_gpfs_lstat,
 	.ntimes = vfs_gpfs_ntimes,
+	.ftruncate = vfs_gpfs_ftruncate
 };
 
 NTSTATUS vfs_gpfs_init(void);
diff --git a/source3/modules/vfs_gpfs.h b/source3/modules/vfs_gpfs.h
index d2899b5bc9..46cfdfea0a 100644
--- a/source3/modules/vfs_gpfs.h
+++ b/source3/modules/vfs_gpfs.h
@@ -34,4 +34,5 @@ int smbd_gpfs_get_realfilename_path(char *pathname, char *filenamep,
 int smbd_fget_gpfs_winattrs(int fd, struct gpfs_winattr *attrs);
 int get_gpfs_winattrs(char * pathname,struct gpfs_winattr *attrs);
 int set_gpfs_winattrs(char * pathname,int flags,struct gpfs_winattr *attrs);
+int smbd_gpfs_ftruncate(int fd, gpfs_off64_t length);
 void init_gpfs(void);