LU-1338 hsm: HSM flags feature

[fs/lustre-release.git] / lustre / utils / liblustreapi_hsm.c

diff --git a/lustre/utils/liblustreapi_hsm.c b/lustre/utils/liblustreapi_hsm.c
index c32fcfe..f065359 100644 (file)
--- a/lustre/utils/liblustreapi_hsm.c
+++ b/lustre/utils/liblustreapi_hsm.c
@@ -58,15 +58,6 @@
 #include <lustre/lustreapi.h>
 #include "lustreapi_internal.h"
 
-/*
- * fake functions, real one will come with HSM flags patch
- */
-static int llapi_hsm_state_set(const char *path, __u64 setmask, __u64 clearmask,
-                              __u32 archive_num)
-{
-       return 0;
-}
-
 /****** HSM Copytool API ********/
 #define CT_PRIV_MAGIC 0xC0BE2001
 struct hsm_copytool_private {
@@ -452,3 +443,73 @@ out_unlink:
        return rc;
 }
 
+
+/**
+ * Return the current HSM states and HSM requests related to file pointed by \a
+ * path.
+ *
+ * \param hus  Should be allocated by caller. Will be filled with current file
+ *             states.
+ *
+ * \retval 0 on success.
+ * \retval -errno on error.
+ */
+int llapi_hsm_state_get(const char *path, struct hsm_user_state *hus)
+{
+       int fd;
+       int rc;
+
+       fd = open(path, O_RDONLY | O_NONBLOCK);
+       if (fd < 0)
+               return -errno;
+
+       rc = ioctl(fd, LL_IOC_HSM_STATE_GET, hus);
+       /* If error, save errno value */
+       rc = rc ? -errno : 0;
+
+       close(fd);
+       return rc;
+}
+
+/**
+ * Set HSM states of file pointed by \a path.
+ *
+ * Using the provided bitmasks, the current HSM states for this file will be
+ * changed. \a archive_id could be used to change the archive number also. Set
+ * it to 0 if you do not want to change it.
+ *
+ * \param setmask      Bitmask for flag to be set.
+ * \param clearmask    Bitmask for flag to be cleared.
+ * \param archive_id  Archive number identifier to use. 0 means no change.
+ *
+ * \retval 0 on success.
+ * \retval -errno on error.
+ */
+int llapi_hsm_state_set(const char *path, __u64 setmask, __u64 clearmask,
+                       __u32 archive_id)
+{
+       struct hsm_state_set hss;
+       int fd;
+       int rc;
+
+       fd = open(path, O_WRONLY | O_LOV_DELAY_CREATE | O_NONBLOCK);
+       if (fd < 0)
+               return -errno;
+
+       hss.hss_valid = HSS_SETMASK|HSS_CLEARMASK;
+       hss.hss_setmask = setmask;
+       hss.hss_clearmask = clearmask;
+       /* Change archive_id if provided. We can only change
+        * to set something different than 0. */
+       if (archive_id > 0) {
+               hss.hss_valid |= HSS_ARCHIVE_ID;
+               hss.hss_archive_id = archive_id;
+       }
+       rc = ioctl(fd, LL_IOC_HSM_STATE_SET, &hss);
+       /* If error, save errno value */
+       rc = rc ? -errno : 0;
+
+       close(fd);
+       return rc;
+}
+