X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lustre%2Futils%2Fliblustreapi_lseek.c;h=90739994950dd9c4ac96342c0e001085a49a9cc3;hb=3d635dd3f24421c181aca5673cd81ed8f3e2c622;hp=0b82bfa1525809000f9a5823e33ebff52d934f73;hpb=0561c144cc1bb623e05d08b5055009e8d86047f4;p=fs%2Flustre-release.git

diff --git a/lustre/utils/liblustreapi_lseek.c b/lustre/utils/liblustreapi_lseek.c
index 0b82bfa..9073999 100644
--- a/lustre/utils/liblustreapi_lseek.c
+++ b/lustre/utils/liblustreapi_lseek.c
@@ -33,6 +33,9 @@
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
+#ifndef FALLOC_FL_PUNCH_HOLE
+#include <linux/falloc.h> /* for RHEL7.3 glibc-headers and earlier */
+#endif
 #include <sys/syscall.h>
 #include <sys/ioctl.h>
 #include <errno.h>
@@ -109,3 +112,24 @@ off_t llapi_data_seek(int src_fd, off_t offset, size_t *length)
 	*length = hole_off - data_off;
 	return data_off;
 }
+
+/**
+ * Punch hole in a file.
+ *
+ * \param fd     file descriptor
+ * \param start  offset to start from
+ * \param length hole length
+ *
+ * \retval 0 on success.
+ * \retval -errno on failure to punch hole
+ */
+int llapi_hole_punch(int fd, off_t start, size_t length)
+{
+	int rc;
+
+	rc = fallocate(fd, FALLOC_FL_PUNCH_HOLE | FALLOC_FL_KEEP_SIZE,
+		       start, length);
+	if (rc)
+		rc = -errno;
+	return rc;
+}