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volume: cache volume attributes on mount

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struct NFS41_V_NET_ROOT_EXTENSION now stores only the FILE_FS_ATTRIBUTE_INFORMATION (without the extra buffer space for a name).  on QueryVolumeInfo() for FileFsAttributeInformation on the root directory, the FILE_FS_ATTRIBUTE_INFORMATION is copied into the output buffer, and the name is added there.  QueryVolumeInfo() only makes upcalls when FileFsAttributeInformation queries are not for the root directory

new function is_root_directory() uses the logic from Set/GetReparsePoint() to determine whether it's operating on the root directory

moved logic from volume.c:handle_volume_attributes() to superblock.c:nfs41_superblock_fs_attributes().  the mount downcall copies the FILE_FS_ATTRIBUTE_INFORMATION buffer down to the driver.  the driver reads this buffer directly into VNetRootContext->FsAttrs

Signed-off-by: Casey Bodley <cbodley@citi.umich.edu>
This commit is contained in:
Casey Bodley 2012-04-10 12:05:43 -04:00 • committed by unknown
parent 4c8c263b49
commit 2baeeb855b
6 changed files with 94 additions and 78 deletions
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36
daemon/volume.c
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@ -112,39 +112,6 @@ out:
return status;
}
static void handle_volume_attributes(
IN volume_upcall_args *args,
IN nfs41_open_state *state)
{
PFILE_FS_ATTRIBUTE_INFORMATION attr = &args->info.attribute;
const nfs41_superblock *superblock = state->file.fh.superblock;
attr->FileSystemAttributes = FILE_SUPPORTS_REMOTE_STORAGE;
if (superblock->link_support)
attr->FileSystemAttributes |= FILE_SUPPORTS_HARD_LINKS;
if (superblock->symlink_support)
attr->FileSystemAttributes |= FILE_SUPPORTS_REPARSE_POINTS;
if (superblock->ea_support)
attr->FileSystemAttributes |= FILE_SUPPORTS_EXTENDED_ATTRIBUTES;
if (superblock->case_preserving)
attr->FileSystemAttributes |= FILE_CASE_PRESERVED_NAMES;
if (!superblock->case_insensitive)
attr->FileSystemAttributes |= FILE_CASE_SENSITIVE_SEARCH;
if (superblock->aclsupport)
attr->FileSystemAttributes |= FILE_PERSISTENT_ACLS;
attr->MaximumComponentNameLength = NFS41_MAX_COMPONENT_LEN;
/* let the driver fill in FileSystemName/Len */
args->len = sizeof(args->info.attribute);
dprintf(2, "FileFsAttributeInformation: case_preserving %u, "
"case_insensitive %u, max component %u\n",
superblock->case_preserving, superblock->case_insensitive,
attr->MaximumComponentNameLength);
}
static int handle_volume(nfs41_upcall *upcall)
{
volume_upcall_args *args = &upcall->args.volume;
@ -176,7 +143,8 @@ static int handle_volume(nfs41_upcall *upcall)
break;
case FileFsAttributeInformation:
handle_volume_attributes(args, upcall->state_ref);
nfs41_superblock_fs_attributes(upcall->state_ref->file.fh.superblock,
&args->info.attribute);
break;
default: