The TREE_SEARCH ioctl is root-only, FS_INFO will be available for
non-root users with an updated kernel, let the user know.
Signed-off-by: David Sterba <dsterba@xxxxxxx>
---
cmds-fi-disk_usage.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/cmds-fi-disk_usage.c b/cmds-fi-disk_usage.c
index 17202de1b6e8..64c85acafd51 100644
--- a/cmds-fi-disk_usage.c
+++ b/cmds-fi-disk_usage.c
@@ -171,6 +171,12 @@ int load_chunk_info(int fd, struct chunk_info **info_ptr, int *info_count)
while (1) {
ret = ioctl(fd, BTRFS_IOC_TREE_SEARCH, &args);
e = errno;
+ if (ret == -EPERM) {
+ fprintf(stderr,
+ "ERROR: can't read detailed chunk info from ioctl(TREE_SEARCH), run as root\n");
+ return 0;
+ }
+
if (ret < 0) {
fprintf(stderr,
"ERROR: can't perform the search - %s\n",
@@ -461,6 +467,10 @@ int load_device_info(int fd, struct device_info **device_info_ptr,
*device_info_ptr = 0;
ret = ioctl(fd, BTRFS_IOC_FS_INFO, &fi_args);
+ if (ret == -EPERM) {
+ fprintf(stderr, "ERROR: can't get filesystem info from ioctl(FS_INFO), run as root\n");
+ return -1;
+ }
if (ret < 0) {
fprintf(stderr, "ERROR: cannot get filesystem info\n");
return -1;
--
1.9.0
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