btrfs-progs: mkfs rootdir: use lgetxattr() not to follow a symbolic link

[platform/upstream/btrfs-progs.git] / cmds-send.c

diff --git a/cmds-send.c b/cmds-send.c
index a4fb126..c5ecdaa 100644 (file)
--- a/cmds-send.c
+++ b/cmds-send.c
@@ -43,8 +43,9 @@
 
 #include "send.h"
 #include "send-utils.h"
+#include "help.h"
 
-#define SEND_BUFFER_SIZE       (64 * 1024)
+#define SEND_BUFFER_SIZE       SZ_64K
 
 /*
  * Default is 1 for historical reasons, changing may break scripts that expect
@@ -70,8 +71,12 @@ static int get_root_id(struct btrfs_send *sctx, const char *path, u64 *root_id)
 
        si = subvol_uuid_search(&sctx->sus, 0, NULL, 0, path,
                        subvol_search_by_path);
-       if (!si)
-               return -ENOENT;
+       if (IS_ERR_OR_NULL(si)) {
+               if (!si)
+                       return -ENOENT;
+               else
+                       return PTR_ERR(si);
+       }
        *root_id = si->root_id;
        free(si->path);
        free(si);
@@ -85,8 +90,8 @@ static struct subvol_info *get_parent(struct btrfs_send *sctx, u64 root_id)
 
        si_tmp = subvol_uuid_search(&sctx->sus, root_id, NULL, 0, NULL,
                        subvol_search_by_root_id);
-       if (!si_tmp)
-               return NULL;
+       if (IS_ERR_OR_NULL(si_tmp))
+               return si_tmp;
 
        si = subvol_uuid_search(&sctx->sus, 0, si_tmp->parent_uuid, 0, NULL,
                        subvol_search_by_uuid);
@@ -105,8 +110,11 @@ static int find_good_parent(struct btrfs_send *sctx, u64 root_id, u64 *found)
        int i;
 
        parent = get_parent(sctx, root_id);
-       if (!parent) {
-               ret = -ENOENT;
+       if (IS_ERR_OR_NULL(parent)) {
+               if (!parent)
+                       ret = -ENOENT;
+               else
+                       ret = PTR_ERR(parent);
                goto out;
        }
 
@@ -122,7 +130,7 @@ static int find_good_parent(struct btrfs_send *sctx, u64 root_id, u64 *found)
                s64 tmp;
 
                parent2 = get_parent(sctx, sctx->clone_sources[i]);
-               if (!parent2)
+               if (IS_ERR_OR_NULL(parent2))
                        continue;
                if (parent2->root_id != parent->root_id) {
                        free(parent2->path);
@@ -136,9 +144,11 @@ static int find_good_parent(struct btrfs_send *sctx, u64 root_id, u64 *found)
                parent2 = subvol_uuid_search(&sctx->sus,
                                sctx->clone_sources[i], NULL, 0, NULL,
                                subvol_search_by_root_id);
-
-               if (!parent2) {
-                       ret = -ENOENT;
+               if (IS_ERR_OR_NULL(parent2)) {
+                       if (!parent2)
+                               ret = -ENOENT;
+                       else
+                               ret = PTR_ERR(parent2);
                        goto out;
                }
                tmp = parent2->ctransid - parent->ctransid;