[ Upstream commit
9b5c6281838fc84683dd99b47302d81fce399918 ]
W=1 warns about null argument to kprintf:
In file included from fs/9p/xattr.c:12:
In function ‘v9fs_xattr_get’,
inlined from ‘v9fs_listxattr’ at fs/9p/xattr.c:142:9:
include/net/9p/9p.h:55:2: error: ‘%s’ directive argument is null
[-Werror=format-overflow=]
55 | _p9_debug(level, __func__, fmt, ##__VA_ARGS__)
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Use an empty string instead of :
- this is ok 9p-wise because p9pdu_vwritef serializes a null string
and an empty string the same way (one '0' word for length)
- since this degrades the print statements, add new single quotes for
xattr's name delimter (Old: "file = (null)", new: "file = ''")
Link: https://lore.kernel.org/r/20231008060138.517057-1-suhui@nfschina.com
Suggested-by: Su Hui <suhui@nfschina.com>
Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>
Acked-by: Christian Schoenebeck <linux_oss@crudebyte.com>
Message-ID: <
20231025103445.1248103-2-asmadeus@codewreck.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
struct p9_fid *fid;
int ret;
- p9_debug(P9_DEBUG_VFS, "name = %s value_len = %zu\n",
+ p9_debug(P9_DEBUG_VFS, "name = '%s' value_len = %zu\n",
name, buffer_size);
fid = v9fs_fid_lookup(dentry);
if (IS_ERR(fid))
ssize_t v9fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size)
{
- return v9fs_xattr_get(dentry, NULL, buffer, buffer_size);
+ /* Txattrwalk with an empty string lists xattrs instead */
+ return v9fs_xattr_get(dentry, "", buffer, buffer_size);
}
static int v9fs_xattr_handler_get(const struct xattr_handler *handler,
goto error;
}
p9_debug(P9_DEBUG_9P,
- ">>> TXATTRWALK file_fid %d, attr_fid %d name %s\n",
+ ">>> TXATTRWALK file_fid %d, attr_fid %d name '%s'\n",
file_fid->fid, attr_fid->fid, attr_name);
req = p9_client_rpc(clnt, P9_TXATTRWALK, "dds",