evin/ms-nfs41-client
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deleg: delegation support for name/attr cache

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when a delegation is granted by OPEN, its delegation type is passed to nfs41_name_cache_insert().  as long as the delegation is held, its name_cache_entry is kept out of the cache.exp_entries list to prevent it from expiring.  an extra reference is held on the attr_cache_entry as well, so it sticks around even if the name_cache_entry is removed (a parent expires, for example).  new function nfs41_name_cache_delegreturn() adds the name_cache_entry back to the list, and releases the extra attr_cache_entry reference

Signed-off-by: Casey Bodley <cbodley@citi.umich.edu>
This commit is contained in:
Casey Bodley 2011-07-06 11:05:45 -04:00 • committed by unknown
parent ee71a62af2
commit 38259e0017
4 changed files with 124 additions and 32 deletions
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14
daemon/nfs41_ops.c
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@ -458,7 +458,7 @@ int nfs41_rpc_open(
AcquireSRWLockShared(&file->path->lock);
nfs41_name_cache_insert(session_name_cache(session),
file->path->path, &file->name, &file->fh,
info, &open_res.resok4.cinfo);
info, &open_res.resok4.cinfo, delegation->type);
ReleaseSRWLockShared(&file->path->lock);
if (create == OPEN4_CREATE)
@ -558,7 +558,7 @@ int nfs41_create(
AcquireSRWLockShared(&file->path->lock);
nfs41_name_cache_insert(session_name_cache(session),
file->path->path, &file->name, &file->fh,
&file_info, &create_res.cinfo);
&file_info, &create_res.cinfo, OPEN_DELEGATE_NONE);
ReleaseSRWLockShared(&file->path->lock);
nfs41_superblock_space_changed(file->fh.superblock);
@ -1401,7 +1401,7 @@ int nfs41_link(
AcquireSRWLockShared(&dst_dir->path->lock);
nfs41_name_cache_insert(session_name_cache(session),
dst_dir->path->path, target, &link_out->fh,
&info[1], &link_res.cinfo);
&info[1], &link_res.cinfo, OPEN_DELEGATE_NONE);
ReleaseSRWLockShared(&dst_dir->path->lock);
nfs41_superblock_space_changed(dst_dir->fh.superblock);
@ -1562,7 +1562,13 @@ int nfs41_delegreturn(
if (status)
goto out;
compound_error(status = compound.res.status);
if (compound_error(status = compound.res.status))
goto out;
AcquireSRWLockShared(&file->path->lock);
nfs41_name_cache_delegreturn(session_name_cache(session),
file->fh.fileid, file->path->path, &file->name);
ReleaseSRWLockShared(&file->path->lock);
out:
return status;
}