When calling find_mount_root(), caller in fact wants to find the mount
point of *BTRFS*.
So also check ent->fstype in find_mount_root() and output proper error
messages if needed.
This will suppress a lot of "Inapproiate ioctl for device" error
message.
Signed-off-by: Qu Wenruo <quwenruo@xxxxxxxxxxxxxx>
---
utils.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/utils.c b/utils.c
index 993d085..507ec6c 100644
--- a/utils.c
+++ b/utils.c
@@ -2412,6 +2412,7 @@ int find_mount_root(const char *path, char **mount_root)
struct mntent *ent;
int len;
int ret;
+ int not_btrfs;
int longest_matchlen = 0;
char *longest_match = NULL;
@@ -2432,6 +2433,10 @@ int find_mount_root(const char *path, char **mount_root)
free(longest_match);
longest_matchlen = len;
longest_match = strdup(ent->mnt_dir);
+ if (strcmp(ent->mnt_type, "btrfs"))
+ not_btrfs = 1;
+ else
+ not_btrfs = 0;
}
}
}
@@ -2443,6 +2448,12 @@ int find_mount_root(const char *path, char **mount_root)
path);
return -ENOENT;
}
+ if (not_btrfs) {
+ fprintf(stderr,
+ "ERROR: %s does not belong to a btrfs mount points.\n",
+ path);
+ return -EINVAL;
+ }
ret = 0;
*mount_root = realpath(longest_match, NULL);
--
2.0.1
--
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