On Fri, Jul 25, 2014 at 7:38 PM, Abhi Das [off-list ref] wrote:

This system call takes 5 arguments:
fd    - file descriptor of the directory
flags - flags used by xstat
mask  - field mask used to request stat/xattr info
buf   - user buf to return collected info
count - size of user buffer in bytes

xgetdents() should read the directory entries, collect stat
and xattr information for each entry as requested and return
all the data back to the user in a container structure
(linux_xdirent) as part of the supplied user buffer.

Hello Abhi,

As per Documentation/SubmitChecklist, please CC linux-api on patches
that change the kerne-user-space API/ABI. (See
https://www.kernel.org/doc/man-pages/linux-api-ml.html for more
details.)

Cheers,

Michael

Abhi Das (5):
  fs: xstat system call VFS bits
  fs: Add xgetdents system call and xreaddir file operation
  gfs2: Add a dynamic buffer backed by a vector of pages
  gfs2: Add sort functionality with extra parameter
  gfs2: Add xreaddir file operation and supporting functions

 arch/x86/syscalls/syscall_32.tbl |    3 +
 arch/x86/syscalls/syscall_64.tbl |    3 +
 fs/gfs2/Makefile                 |    3 +-
 fs/gfs2/dir.c                    |   80 +--
 fs/gfs2/dir.h                    |   13 +-
 fs/gfs2/export.c                 |    2 +-
 fs/gfs2/file.c                   |   17 +-
 fs/gfs2/incore.h                 |    6 +
 fs/gfs2/inode.c                  |    3 +-
 fs/gfs2/inode.h                  |    5 +
 fs/gfs2/ops_fstype.c             |    4 +
 fs/gfs2/sys.c                    |   26 +-
 fs/gfs2/util.c                   |  363 ++++++++++++++
 fs/gfs2/util.h                   |   47 ++
 fs/gfs2/xattr.c                  |   27 +-
 fs/gfs2/xattr.h                  |   23 +
 fs/gfs2/xreaddir.c               | 1024 ++++++++++++++++++++++++++++++++++++++
 fs/gfs2/xreaddir.h               |   84 ++++
 fs/readdir.c                     |   42 ++
 fs/stat.c                        |  340 ++++++++++++-
 include/linux/fs.h               |    5 +
 include/linux/stat.h             |   16 +-
 include/linux/syscalls.h         |    5 +
 include/uapi/linux/fcntl.h       |    1 +
 include/uapi/linux/stat.h        |  143 ++++++
 25 files changed, 2196 insertions(+), 89 deletions(-)
 create mode 100644 fs/gfs2/xreaddir.c
 create mode 100644 fs/gfs2/xreaddir.h

--
1.8.1.4

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-- 
Michael Kerrisk Linux man-pages maintainer;
http://www.kernel.org/doc/man-pages/
Author of "The Linux Programming Interface", http://blog.man7.org/