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| author |   Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> | 2010-08-16 01:54:52 +0900 |
|---|---|---|
| committer | Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> | 2010-10-23 09:24:36 +0900 |
| commit | f11459ad7dab9e9eb5a05b8bd3bec338ea8f485d (patch) | |
| tree | 91808a1f88f6ad24f381473e1bde22f10cac49e6 /Documentation | |
| parent | nilfs2: split out nilfs_attach_snapshot (diff) | |
| download | linux-dev-f11459ad7dab9e9eb5a05b8bd3bec338ea8f485d.tar.xz linux-dev-f11459ad7dab9e9eb5a05b8bd3bec338ea8f485d.zip | |
nilfs2: do not allocate multiple super block instances for a device
This stops allocating multiple super block instances for a device.
All snapshots and a current mode mount (i.e. latest tree) will be
controlled with nilfs_root objects that are kept within an sb
instance.
nilfs_get_sb() is rewritten so that it always has a root object for
the latest tree and snapshots make additional root objects.
The root dentry of the latest tree is binded to sb->s_root even if it
isn't attached on a directory. Root dentries of snapshots or the
latest tree are binded to mnt->mnt_root on which they are mounted.
With this patch, nilfs_find_sbinfo() function, nilfs->ns_supers list,
and nilfs->ns_current back pointer, are deleted. In addition,
init_nilfs() and load_nilfs() are simplified since they will be called
once for a device, not repeatedly called for mount points.
Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Diffstat (limited to 'Documentation')
0 files changed, 0 insertions, 0 deletions