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add ability to turn on/off xattr support at runtime

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This commit is contained in:
Antonio SJ Musumeci 2018-10-07 22:28:58 -04:00
parent 6ee44e451c
commit 65f482e483
9 changed files with 138 additions and 18 deletions
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30
src/option_parser.cpp
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@ -29,6 +29,7 @@
#include <iomanip>
#include "config.hpp"
#include "errno.hpp"
#include "fs_glob.hpp"
#include "num.hpp"
#include "policy.hpp"
@ -148,6 +149,23 @@ parse_and_process(const std::string &value,
return 0;
}
static
int
parse_and_process_errno(const std::string &value_,
int &errno_)
{
if(value_ == "passthrough")
errno_ = 0;
else if(value_ == "notsup")
errno_ = ENOTSUP;
else if(value_ == "noattr")
errno_ = ENOATTR;
else
return 1;
return 0;
}
static
int
parse_and_process_arg(Config &config,
@ -199,6 +217,8 @@ parse_and_process_kv_arg(Config &config,
rv = parse_and_process(value,config.security_capability);
else if(key == "link_cow")
rv = parse_and_process(value,config.link_cow);
else if(key == "xattr")
rv = parse_and_process_errno(value,config.xattr);
}
if(rv == -1)
@ -305,11 +325,17 @@ usage(void)
" -o ignorepponrename=<bool>\n"
" Ignore path preserving when performing renames\n"
" and links. default = false\n"
" -o link_cow=<bool> delink/clone file on open to simulate CoW.\n"
" default = false\n"
" -o security_capability=<bool>\n"
" When disabled return ENOATTR when the xattr\n"
" security.capability is queried. default = true\n"
" -o link_cow=<bool> delink/clone file on open to simulate CoW.\n"
" default = false\n"
" -o xattr=passthrough|noattr|notsup\n"
" Runtime control of xattrs. By default xattr\n"
" requests will pass through to the underlying\n"
" filesystems. notattr will short circuit as if\n"
" nothing exists. notsup will respond as if not\n"
" supported or disabled. default = passthrough\n"
<< std::endl;
}