btrfs-progs: Use btrfs_open_dir to avoid show error of ioctl or tree search

Use btrfs_open_dir() instead of open_file_or_dir(), to show error before real action(in ioctl or tree search), to make the error message exact and unified.

It can also make code simple:
85 insertions(+), 185 deletions(-)

Also include some small bug fix.

Before patch:

  # grep open_file_or_dir *.c
  btrfs-fragments.c:      fd = open_file_or_dir(path, &dirstream);
  cmds-balance.c: fd = open_file_or_dir(path, &dirstream);
  cmds-balance.c: fd = open_file_or_dir(path, &dirstream);
  cmds-balance.c: fd = open_file_or_dir(path, &dirstream);
  cmds-balance.c: fd = open_file_or_dir(path, &dirstream);
  cmds-balance.c: fd = open_file_or_dir(path, &dirstream);
  cmds-filesystem.c:      fd = open_file_or_dir(path, &dirstream);
  cmds-filesystem.c:      fd = open_file_or_dir(path, &dirstream);
  cmds-filesystem.c:              fd = open_file_or_dir(argv[i], &dirstream);
  cmds-filesystem.c:      fd = open_file_or_dir(path, &dirstream);
  cmds-fi-usage.c:                fd = open_file_or_dir(argv[i], &dirstream);
  cmds-inspect.c: fd = open_file_or_dir(argv[optind+1], &dirstream);
  cmds-inspect.c: fd = open_file_or_dir(argv[optind+1], &dirstream);
  cmds-inspect.c:                         path_fd = open_file_or_dir(full_path, &dirs);
  cmds-inspect.c: fd = open_file_or_dir(argv[2], &dirstream);
  cmds-inspect.c: fd = open_file_or_dir(argv[1], &dirstream);
  cmds-inspect.c: fd = open_file_or_dir(argv[optind], &dirstream);
  cmds-qgroup.c:  fd = open_file_or_dir(path, &dirstream);
  cmds-qgroup.c:  fd = open_file_or_dir(path, &dirstream);
  cmds-qgroup.c:  fd = open_file_or_dir(path, &dirstream);
  cmds-qgroup.c:  fd = open_file_or_dir(path, &dirstream);
  cmds-quota.c:   fd = open_file_or_dir(path, &dirstream);
  cmds-quota.c:   fd = open_file_or_dir(path, &dirstream);
  cmds-replace.c: fd = open_file_or_dir(path, &dirstream);
  cmds-replace.c: fd = open_file_or_dir(path, &dirstream);
  cmds-subvolume.c:       fddst = open_file_or_dir(dstdir, &dirstream);
  cmds-subvolume.c:       fd = open_file_or_dir(dname, &dirstream);
  cmds-subvolume.c:       fd = open_file_or_dir(subvol, &dirstream);
  cmds-subvolume.c:       fddst = open_file_or_dir(dstdir, &dirstream1);
  cmds-subvolume.c:       fd = open_file_or_dir(subvol, &dirstream2);
  cmds-subvolume.c:       fd = open_file_or_dir(subvol, &dirstream);
  cmds-subvolume.c:       fd = open_file_or_dir(path, &dirstream);
  cmds-subvolume.c:       fd = open_file_or_dir(subvol, &dirstream);
  cmds-subvolume.c:       fd = open_file_or_dir(fullpath, &dirstream1);
  cmds-subvolume.c:       mntfd = open_file_or_dir(mnt, &dirstream2);
  cmds-subvolume.c:       fd = open_file_or_dir(argv[optind], &dirstream);
  props.c:        fd = open_file_or_dir3(object, &dirstream, open_flags);
  utils.c:                fdmnt = open_file_or_dir(mp, dirstream);
  utils.c:                fdmnt = open_file_or_dir(path, dirstream);
  utils.c: * Do the following checks before calling open_file_or_dir():
  utils.c:        ret = open_file_or_dir(path, dirstream);
  utils.c:int open_file_or_dir3(const char *fname, DIR **dirstream, int open_flags)
  utils.c:int open_file_or_dir(const char *fname, DIR **dirstream)
  utils.c:        return open_file_or_dir3(fname, dirstream, O_RDWR);
  utils.c:        fd = open_file_or_dir(path, &dirstream);
  #

After patch:

  # grep open_file_or_dir *.c
  cmds-filesystem.c:              fd = open_file_or_dir(argv[i], &dirstream); *1
  props.c:        fd = open_file_or_dir3(object, &dirstream, open_flags);
  utils.c:                ret = open_file_or_dir(mp, dirstream);
  utils.c: * Do the following checks before calling open_file_or_dir():
  utils.c:        ret = open_file_or_dir(path, dirstream);
  utils.c:int open_file_or_dir3(const char *fname, DIR **dirstream, int open_flags)
  utils.c:int open_file_or_dir(const char *fname, DIR **dirstream)
  utils.c:        return open_file_or_dir3(fname, dirstream, O_RDWR);
  utils.c:        fd = open_file_or_dir(path, &dirstream);
  #
  *1: It is used to open dir or file, can not use btrfs_open_dir()
      instead.

Zhao Lei (11):
btrfs-progs: subvolume: use btrfs_open_dir for btrfs subvolume command
btrfs-progs: filesystem: use btrfs_open_dir for btrfs filesystem
command
btrfs-progs: balance: use btrfs_open_dir for btrfs balance command
btrfs-progs: inspect: Bypass unnecessary clean function in open_error
btrfs-progs: inspect: set return value of error case
btrfs-progs: inspect: use btrfs_open_dir for btrfs inspect command
btrfs-progs: qgroup: use btrfs_open_dir for btrfs qgroup command
btrfs-progs: quota: use btrfs_open_dir for btrfs quota command
btrfs-progs: use btrfs_open_dir in open_path_or_dev_mnt
btrfs-progs: replace: use btrfs_open_dir for btrfs replace command
btrfs-progs: fragments: use btrfs_open_dir for btrfs-fragments command

 btrfs-fragments.c |  6 ++----
 cmds-balance.c    | 30 ++++++++++-------------------
 cmds-device.c     | 13 ++-----------
 cmds-fi-usage.c   |  4 +---
 cmds-filesystem.c | 19 +++++++------------
 cmds-inspect.c    | 26 +++++++++-----------------
 cmds-qgroup.c     | 24 ++++++++----------------
 cmds-quota.c      | 12 ++++--------
 cmds-replace.c    | 29 ++++++----------------------
 cmds-scrub.c      | 28 +++++-----------------------
 cmds-subvolume.c  | 56 +++++++++++++++++++------------------------------------
 utils.c           | 21 +++++++++++----------
 utils.h           |  2 +-
 13 files changed, 85 insertions(+), 185 deletions(-)

1.8.5.1