From a7faf039f19ab79f7ecafd17f8afe2d7939c56f9 Mon Sep 17 00:00:00 2001
From: shaocheng <shaocheng>
Date: Fri, 30 Jan 2004 22:26:43 +0000
Subject: [PATCH] add functionality to set/get stripe info on directories.  -
 add "lfs dsetstripe" to set dir's stripe info  - using the existing "lfs
 find" to retrieve stripe info  - files created under a directory will use the
 directory's stripe info as default  - bugs: mkdir dir1; lfs dsetstripe dir1;
 cd dir1. can't enter it. the reason is that mdc_req2lustre_md will get the
 stripe info for dir1, which can not pass lov_verify_lmm due to different size
 of lov_mds_md returned.

---
 lustre/utils/liblustreapi.c | 52 +++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)

diff --git a/lustre/utils/liblustreapi.c b/lustre/utils/liblustreapi.c
index 6fcfc4d..760b63f 100644
--- a/lustre/utils/liblustreapi.c
+++ b/lustre/utils/liblustreapi.c
@@ -96,6 +96,34 @@ int op_create_file(char *name, long stripe_size, int stripe_offset,
         return rc;
 }
 
+int op_setstripe_dir(char *path, long stripe_size, int stripe_offset,
+                     int stripe_count)
+{
+        struct lov_user_md lum = { 0 };
+        int rc = 0;
+        DIR * dir;
+
+        /*  Initialize IOCTL striping pattern structure  */
+        lum.lmm_magic = LOV_USER_MAGIC;
+        lum.lmm_stripe_size = stripe_size;
+        lum.lmm_stripe_offset = stripe_offset;
+        lum.lmm_stripe_count = stripe_count;
+
+        dir = opendir(path);
+        if (dir == NULL) {
+                err_msg("\"%.40s\" opendir failed", path);
+                rc = -errno;
+        } else {
+                if (ioctl(dirfd(dir), LL_IOC_LOV_SETSTRIPE, &lum)) {
+                        fprintf(stderr, "error on ioctl for '%s': %s\n",
+                                path, strerror(errno));
+                        rc = -errno;
+                }
+                close(dir);
+        }
+
+        return rc;
+}
 
 struct find_param {
         int     recursive;
@@ -338,6 +366,30 @@ static int process_dir(DIR *dir, char *dname, struct find_param *param)
                         return rc;
         }
 
+        /* retrieve dir's stripe info */
+        strncpy((char *)param->lum, dname, param->buflen);
+        rc = ioctl(dirfd(dir), LL_IOC_LOV_GETSTRIPE, (void *)param->lum);
+        if (rc) {
+                if (errno == ENODATA) {
+                        if (!param->obduuid && !param->quiet)
+                                fprintf(stderr,
+                                        "%s/%s has no stripe info\n",
+                                        dname, "");
+                        rc = 0;
+                } else if (errno == EISDIR) {
+                        fprintf(stderr, "process_file on directory %s/%s!\n",
+                                dname, "");
+                        /* add fname to directory list; */
+                        rc = errno;
+                } else {
+                        err_msg("IOC_MDC_GETSTRIPE ioctl failed");
+                        rc = errno;
+                }
+                return rc;
+        }
+
+        lov_dump_user_lmm(param, dname, "");
+
         /* Handle the contents of the directory */
         while ((dirp = readdir64(dir)) != NULL) {
                 if (!strcmp(dirp->d_name, ".") || !strcmp(dirp->d_name, ".."))
-- 
1.8.3.1