[Libguestfs] [PATCH v2 3/4] New API: btrfs_inspect_internal_inode_resolve

[Chen Hanxiao]

From: Hu Tao <hutao at cn.fujitsu.com>

Signed-off-by: Hu Tao <hutao at cn.fujitsu.com>
Signed-off-by: Chen Hanxiao <chenhanxiao at cn.fujitsu.com>
---
 daemon/btrfs.c       | 41 +++++++++++++++++++++++++++++++++++++++++
 generator/actions.ml | 15 +++++++++++++++
 src/MAX_PROC_NR      |  2 +-
 3 files changed, 57 insertions(+), 1 deletion(-)

diff --git a/daemon/btrfs.c b/daemon/btrfs.c
index d460c19..2c2eb57 100644
--- a/daemon/btrfs.c
+++ b/daemon/btrfs.c
@@ -2008,3 +2008,44 @@ do_btrfs_inspect_internal_subvolid_resolve (int64_t id, const char *fs)
 
   return out;
 }
+
+char *
+do_btrfs_inspect_internal_inode_resolve (int64_t inode, const char *fs)
+{
+  const size_t MAX_ARGS = 64;
+  const char *argv[MAX_ARGS];
+  size_t i = 0;
+  CLEANUP_FREE char *fs_buf = NULL;
+  CLEANUP_FREE char *err = NULL;
+  char *out;
+  size_t len;
+  int r;
+  char inode_str[32];
+
+  fs_buf = sysroot_path (fs);
+  if (fs_buf == NULL) {
+    reply_with_perror ("malloc");
+    return NULL;
+  }
+
+  ADD_ARG (argv, i, str_btrfs);
+  ADD_ARG (argv, i, "inspect-internal");
+  ADD_ARG (argv, i, "inode-resolve");
+  snprintf (inode_str, sizeof inode_str, "%" PRIi64, inode);
+  ADD_ARG (argv, i, inode_str);
+  ADD_ARG (argv, i, fs_buf);
+  ADD_ARG (argv, i, NULL);
+
+  r = commandv (&out, &err, argv);
+  if (r == -1) {
+    reply_with_error ("%s: %s", fs, err);
+    return NULL;
+  }
+
+  /* Trim trailing '\n' */
+  len = strlen (out);
+  if (len > 0 && out[len-1] == '\n')
+    out[len-1] = '\0';
+
+  return out;
+}
diff --git a/generator/actions.ml b/generator/actions.ml
index e404f9f..0014c7d 100644
--- a/generator/actions.ml
+++ b/generator/actions.ml
@@ -12506,6 +12506,21 @@ Get tree ID of the containing subvolume of path." };
     longdesc = "\
 Get path on a btrfs filesystem for the given subvolume ID." };
 
+  { defaults with
+    name = "btrfs_inspect_internal_inode_resolve";
+    style = RString "path", [Int64 "inode"; Pathname "fs"], [];
+    proc_nr = Some 452;
+    optional = Some "btrfs"; camel_name = "BTRFSInspectInternalInodeResolve";
+    tests = [
+      InitPartition, Always, TestRun (
+        [["mkfs_btrfs"; "/dev/sda1"; ""; ""; "NOARG"; ""; "NOARG"; "NOARG"; ""; ""];
+         ["mount"; "/dev/sda1"; "/"];
+         ["btrfs_inspect_internal_inode_resolve"; "256"; "/"]]), [];
+    ];
+    shortdesc = "get path for the given inode";
+    longdesc = "\
+Get path on a btrfs filesystem for the given inode." };
+
 ]
 
 (* Non-API meta-commands available only in guestfish.
diff --git a/src/MAX_PROC_NR b/src/MAX_PROC_NR
index 4619a8a..8670c73 100644
--- a/src/MAX_PROC_NR
+++ b/src/MAX_PROC_NR
@@ -1 +1 @@
-451
+452
-- 
2.1.0