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  1. 06 Oct, 2009 7 commits
    • Sage Weil's avatar
      ceph: directory operations · 2817b000
      Sage Weil authored 
      Directory operations, including lookup, are defined here.  We take
advantage of lookup intents when possible.  For the most part, we just
need to build the proper requests for the metadata server(s) and
pass things off to the mds_client.

The results of most operations are normally incorporated into the
client's cache when the reply is parsed by ceph_fill_trace().
However, if the MDS replies without a trace (e.g., when retrying an
update after an MDS failure recovery), some operation-specific cleanup
may be needed.

We can validate cached dentries in two ways.  A per-dentry lease may
be issued by the MDS, or a per-directory cap may be issued that acts
as a lease on the entire directory.  In the latter case, a 'gen' value
is used to determine which dentries belong to the currently leased
directory contents.

We normally prepopulate the dcache and icache with readdir results.
This makes subsequent lookups and getattrs avoid any server
interaction.  It also lets us satisfy readdir operation by peeking at
the dcache IFF we hold the per-directory cap/lease, previously
performed a readdir, and haven't dropped any of the resulting
dentries.
Signed-off-by: default avatarSage Weil <sage@newdream.net>
      2817b000
    • Sage Weil's avatar
      ceph: inode operations · 355da1eb
      Sage Weil authored 
      Inode cache and inode operations.  We also include routines to
incorporate metadata structures returned by the MDS into the client
cache, and some helpers to deal with file capabilities and metadata
leases.  The bulk of that work is done by fill_inode() and
fill_trace().
Signed-off-by: default avatarSage Weil <sage@newdream.net>
      355da1eb
    • Sage Weil's avatar
      ceph: super.c · 16725b9d
      Sage Weil authored 
      Mount option parsing, client setup and teardown, and a few odds and
ends (e.g., statfs).
Signed-off-by: default avatarSage Weil <sage@newdream.net>
      16725b9d
    • Sage Weil's avatar
      ceph: ref counted buffer · c30dbb9c
      Sage Weil authored 
      struct ceph_buffer is a simple ref-counted buffer.  We transparently
choose between kmalloc for small buffers and vmalloc for large ones.

This is currently used only for allocating memory for xattr data.
Signed-off-by: default avatarSage Weil <sage@newdream.net>
      c30dbb9c
    • Sage Weil's avatar
      ceph: client types · de57606c
      Sage Weil authored 
      We first define constants, types, and prototypes for the kernel client
proper.

A few subsystems are defined separately later: the MDS, OSD, and
monitor clients, and the messaging layer.
Signed-off-by: default avatarSage Weil <sage@newdream.net>
      de57606c
    • Sage Weil's avatar
      ceph: on-wire types · 0dee3c28
      Sage Weil authored 
      These headers describe the types used to exchange messages between the
Ceph client and various servers.  All types are little-endian and
packed.  These headers are shared between the kernel and userspace, so
all types are in terms of e.g. __u32.

Additionally, we define a few magic values to identify the current
version of the protocol(s) in use, so that discrepancies to be
detected on mount.
Signed-off-by: default avatarSage Weil <sage@newdream.net>
      0dee3c28
    • Sage Weil's avatar
      ceph: documentation · 7ad920b5
      Sage Weil authored 
      Mount options, syntax.
Signed-off-by: default avatarSage Weil <sage@newdream.net>
      7ad920b5
  3. 27 Sep, 2009 14 commits
  5. 26 Sep, 2009 19 commits
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