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block/nfs: Implement bdrv_dirname()
While the basic idea is obvious and could be handled by the default bdrv_dirname() implementation, we cannot generate a directory name if the gid or uid are set, so we have to explicitly return NULL in those cases. Signed-off-by: Max Reitz <mreitz@redhat.com> Reviewed-by: Alberto Garcia <berto@igalia.com> Message-id: 20190201192935.18394-19-mreitz@redhat.com Signed-off-by: Max Reitz <mreitz@redhat.com>
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parent
8a6239c071
commit
0dcbc54a95
15
block/nfs.c
15
block/nfs.c
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@ -855,6 +855,20 @@ static void nfs_refresh_filename(BlockDriverState *bs, QDict *options)
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bs->full_open_options = opts;
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}
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static char *nfs_dirname(BlockDriverState *bs, Error **errp)
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{
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NFSClient *client = bs->opaque;
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if (client->uid || client->gid) {
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bdrv_refresh_filename(bs);
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error_setg(errp, "Cannot generate a base directory for NFS node '%s'",
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bs->filename);
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return NULL;
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}
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return g_strdup_printf("nfs://%s%s/", client->server->host, client->path);
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}
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#ifdef LIBNFS_FEATURE_PAGECACHE
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static void coroutine_fn nfs_co_invalidate_cache(BlockDriverState *bs,
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Error **errp)
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@ -889,6 +903,7 @@ static BlockDriver bdrv_nfs = {
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.bdrv_detach_aio_context = nfs_detach_aio_context,
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.bdrv_attach_aio_context = nfs_attach_aio_context,
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.bdrv_refresh_filename = nfs_refresh_filename,
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.bdrv_dirname = nfs_dirname,
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#ifdef LIBNFS_FEATURE_PAGECACHE
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.bdrv_co_invalidate_cache = nfs_co_invalidate_cache,
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