X-Git-Url: https://git.whamcloud.com/?a=blobdiff_plain;f=lustre%2Futils%2Fliblustreapi_lease.c;h=60ad9bc8adc883162424698dfdd9565335532027;hb=3b0094779b58c162e5dc553f6d7cdff1910d0c3b;hp=d6063d48bcca374719d561995c3a5ada208e81ae;hpb=e5f0eff4514adbfca7a7de6a6e4c1d0448089698;p=fs%2Flustre-release.git

diff --git a/lustre/utils/liblustreapi_lease.c b/lustre/utils/liblustreapi_lease.c
index d6063d4..60ad9bc 100644
--- a/lustre/utils/liblustreapi_lease.c
+++ b/lustre/utils/liblustreapi_lease.c
@@ -6,6 +6,8 @@
  * (C) Copyright 2014 Commissariat a l'energie atomique et aux energies
  *     alternatives
  *
+ * Copyright (c) 2017, Intel Corporation.
+ *
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the GNU Lesser General Public License
  * (LGPL) version 2.1 or (at your discretion) any later version.
@@ -34,8 +36,7 @@
 #include <lustre/lustreapi.h>
 #include "lustreapi_internal.h"
 
-
-static inline const char *lease_mode2str(int mode)
+static inline const char *lease_mode2str(enum ll_lease_mode mode)
 {
 	switch (mode) {
 	case LL_LEASE_WRLCK: return "WRITE";
@@ -46,31 +47,96 @@ static inline const char *lease_mode2str(int mode)
 }
 
 /**
- * Get a lease on an open file.
+ * Extend lease set support.
+ *
+ * \param fd	File to set lease on.
+ * \param data	ll_ioc_lease data.
+ *
+ * For setting lease lock, it will return zero for success. For unlock, it will
+ * return the lock type it owned for succuess.
+ *
+ * \retval >= 0 on success.
+ * \retval -errno on error.
+ */
+int llapi_lease_set(int fd, const struct ll_ioc_lease *data)
+{
+	int rc;
+
+	rc = ioctl(fd, LL_IOC_SET_LEASE, data);
+	if (rc < 0) {
+		rc = -errno;
+
+		llapi_error(LLAPI_MSG_ERROR, rc, "cannot get %s lease, ext %x",
+			    lease_mode2str(data->lil_mode), data->lil_flags);
+	}
+	return rc;
+}
+
+/**
+ * Acquire a lease on an open file.
  *
  * \param fd    File to get the lease on.
  * \param mode  Lease mode, either LL_LEASE_RDLCK or LL_LEASE_WRLCK.
  *
- * \retval 0 on success.
+ * \see llapi_lease_release().
+ *
+ * \retval >= 0 on success.
  * \retval -errno on error.
  */
-int llapi_lease_get(int fd, int mode)
+int llapi_lease_acquire(int fd, enum ll_lease_mode mode)
 {
+	struct ll_ioc_lease data = { .lil_mode = mode };
 	int rc;
 
 	if (mode != LL_LEASE_RDLCK && mode != LL_LEASE_WRLCK)
 		return -EINVAL;
 
-	rc = ioctl(fd, LL_IOC_SET_LEASE, mode);
-	if (rc < 0) {
-		rc = -errno;
-		llapi_error(LLAPI_MSG_ERROR, rc, "cannot get %s lease",
-			    lease_mode2str(mode));
+	rc = llapi_lease_set(fd, &data);
+	if (rc == -ENOTTY) {
+		rc = ioctl(fd, LL_IOC_SET_LEASE_OLD, mode);
+		if (rc < 0)
+			rc = -errno;
 	}
+
 	return rc;
 }
 
 /**
+ * Release a lease.
+ *
+ * \param fd    File to remove the lease from.
+ *
+ * \retval type of the lease that was removed (LL_LEASE_READ or LL_LEASE_WRITE).
+ * \retval 0 if no lease was present.
+ * \retval -errno on error.
+ */
+int llapi_lease_release(int fd)
+{
+	struct ll_ioc_lease data = { .lil_mode = LL_LEASE_UNLCK };
+
+	return llapi_lease_set(fd, &data);
+}
+
+/**
+ * Release a lease with intent operation. This API will release the lease
+ * and execute the intent operation atomically.
+ *
+ * \param fd    File to remove the lease from.
+ *
+ * \retval type of the lease that was removed (LL_LEASE_READ or LL_LEASE_WRITE).
+ * \retval 0 if no lease was present.
+ * \retval -EBUSY lease broken, intent operation not executed.
+ * \retval -errno on error.
+ */
+int llapi_lease_release_intent(int fd, struct ll_ioc_lease *data)
+{
+	if (data->lil_mode != LL_LEASE_UNLCK)
+		return -EINVAL;
+
+	return llapi_lease_set(fd, data);
+}
+
+/**
  * Check if a lease is still set on a file.
  *
  * \param fd    File to check the lease on.
@@ -92,22 +158,32 @@ int llapi_lease_check(int fd)
 }
 
 /**
- * Remove a lease.
- *
- * \param fd    File to remove the lease from.
- *
- * \retval type of the lease that was removed (LL_LEASE_READ or LL_LEASE_WRITE).
- * \retval 0 if no lease was present.
- * \retval -errno on error.
+ * XXX: This is an obsoleted API - do not use it any more.
+ */
+int llapi_lease_get(int fd, int mode)
+{
+	int rc;
+
+	if (mode != LL_LEASE_RDLCK && mode != LL_LEASE_WRLCK)
+		return -EINVAL;
+
+	rc = ioctl(fd, LL_IOC_SET_LEASE_OLD, mode);
+	if (rc < 0)
+		rc = -errno;
+
+	return rc;
+}
+
+/**
+ * XXX: This is an obsoleted API - do not use it any more.
  */
 int llapi_lease_put(int fd)
 {
 	int rc;
 
-	rc = ioctl(fd, LL_IOC_SET_LEASE, LL_LEASE_UNLCK);
-	if (rc < 0) {
+	rc = ioctl(fd, LL_IOC_SET_LEASE_OLD, LL_LEASE_UNLCK);
+	if (rc < 0)
 		rc = -errno;
-		llapi_error(LLAPI_MSG_ERROR, rc, "cannot put lease");
-	}
+
 	return rc;
 }