Mirror
/
mergerfs
mirror of https://github.com/trapexit/mergerfs.git
1
0
Fork 0
Code Issues Projects Releases Wiki Activity
Browse Source

refactor and simplify getxattr for user.mergerfs.\*

pull/114/head
Antonio SJ Musumeci 9 years ago
parent
22d254e8df
commit
8178bf518c
3 changed files with 77 additions and 40 deletions
Whitespace
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Split View
Diff Options
Show Stats Download Patch File Download Diff File
  1. 105
      src/getxattr.cpp
  2. 8
      src/str.cpp
  3. 4
      src/str.hpp

105
src/getxattr.cpp
View File

@ -46,15 +46,33 @@ using std::vector;
using std::set;
using namespace mergerfs;
static
int
_lgetxattr(const string &path,
const string &name,
void *value,
const size_t size)
{
#ifndef WITHOUT_XATTR
int rv;
rv = ::lgetxattr(path.c_str(),name.c_str(),value,size);
return ((rv == -1) ? -errno : rv);
#else
return -ENOSUP;
#endif
}
static
void
_getxattr_controlfile_fusefunc_policy(const Config &config,
const char *attrbasename,
const string &attr,
string &attrvalue)
{
FuseFunc fusefunc;
fusefunc = FuseFunc::find(attrbasename);
fusefunc = FuseFunc::find(attr);
if(fusefunc != FuseFunc::invalid)
attrvalue = (std::string)*config.policies[(FuseFunc::Enum::Type)*fusefunc];
}
@ -62,12 +80,12 @@ _getxattr_controlfile_fusefunc_policy(const Config &config,
static
void
_getxattr_controlfile_category_policy(const Config &config,
const char *attrbasename,
const string &attr,
string &attrvalue)
{
Category cat;
cat = Category::find(attrbasename);
cat = Category::find(attr);
if(cat != Category::invalid)
{
vector<string> policies;
@ -107,25 +125,34 @@ _getxattr_controlfile_minfreespace(const Config &config,
static
int
_getxattr_controlfile(const Config &config,
const char *attrname,
const string &attrname,
char *buf,
const size_t count)
{
size_t len;
string attrvalue;
const char *attrbasename = &attrname[sizeof("user.mergerfs.")-1];
vector<string> attr;
if(strncmp("user.mergerfs.",attrname,sizeof("user.mergerfs.")-1))
str::split(attr,attrname,'.');
if((attr[0] != "user") || (attr[1] != "mergerfs"))
return -ENOATTR;
if(!strcmp("srcmounts",attrbasename))
_getxattr_controlfile_srcmounts(config,attrvalue);
else if(!strcmp("minfreespace",attrbasename))
_getxattr_controlfile_minfreespace(config,attrvalue);
else if(!strncmp("category.",attrbasename,sizeof("category.")-1))
_getxattr_controlfile_category_policy(config,&attrbasename[sizeof("category.")-1],attrvalue);
else if(!strncmp("func.",attrbasename,sizeof("func.")-1))
_getxattr_controlfile_fusefunc_policy(config,&attrbasename[sizeof("func.")-1],attrvalue);
switch(attr.size())
{
case 3:
if(attr[2] == "srcmounts")
_getxattr_controlfile_srcmounts(config,attrvalue);
else if(attr[2] == "minfreespace")
_getxattr_controlfile_minfreespace(config,attrvalue);
break;
case 4:
if(attr[2] == "category")
_getxattr_controlfile_category_policy(config,attr[3],attrvalue);
else if(attr[2] == "func")
_getxattr_controlfile_fusefunc_policy(config,attr[3],attrvalue);
break;
}
if(attrvalue.empty())
return -ENOATTR;
@ -155,7 +182,7 @@ _getxattr_from_string(char *destbuf,
return srcbufsize;
if(srcbufsize > destbufsize)
return (errno = ERANGE, -1);
return -ERANGE;
memcpy(destbuf,src.data(),srcbufsize);
@ -176,7 +203,7 @@ _getxattr_user_mergerfs_allpaths(const vector<string> &srcmounts,
concated = str::join(paths,'\0');
return ::_getxattr_from_string(buf,count,concated);
return _getxattr_from_string(buf,count,concated);
}
static
@ -185,22 +212,24 @@ _getxattr_user_mergerfs(const string &basepath,
const string &fusepath,
const string &fullpath,
const vector<string> &srcmounts,
const char *attrname,
const string &attrname,
char *buf,
const size_t count)
{
const char *attrbasename = &attrname[sizeof("user.mergerfs")];
if(!strcmp(attrbasename,"basepath"))
return ::_getxattr_from_string(buf,count,basepath);
else if(!strcmp(attrbasename,"fullpath"))
return ::_getxattr_from_string(buf,count,fullpath);
else if(!strcmp(attrbasename,"relpath"))
return ::_getxattr_from_string(buf,count,fusepath);
else if(!strcmp(attrbasename,"allpaths"))
return ::_getxattr_user_mergerfs_allpaths(srcmounts,fusepath,buf,count);
return ::lgetxattr(fullpath.c_str(),attrname,buf,count);
vector<string> attr;
str::split(attr,attrname,'.');
if(attr[2] == "basepath")
return _getxattr_from_string(buf,count,basepath);
else if(attr[2] == "relpath")
return _getxattr_from_string(buf,count,fusepath);
else if(attr[2] == "fullpath")
return _getxattr_from_string(buf,count,fullpath);
else if(attr[2] == "allpaths")
return _getxattr_user_mergerfs_allpaths(srcmounts,fusepath,buf,count);
return -ENOATTR;
}
static
@ -209,30 +238,26 @@ _getxattr(Policy::Func::Search searchFunc,
const vector<string> &srcmounts,
const size_t minfreespace,
const string &fusepath,
const char *attrname,
const string &attrname,
char *buf,
const size_t count)
{
#ifndef WITHOUT_XATTR
int rv;
vector<string> basepath;
string fullpath;
vector<string> basepath;
rv = searchFunc(srcmounts,fusepath,minfreespace,basepath);
if(rv == -1)
return -errno;
fullpath = fs::path::make(basepath[0],fusepath);
fs::path::make(basepath[0],fusepath,fullpath);
if(!strncmp("user.mergerfs.",attrname,sizeof("user.mergerfs.")-1))
if(str::isprefix(attrname,"user.mergerfs."))
rv = _getxattr_user_mergerfs(basepath[0],fusepath,fullpath,srcmounts,attrname,buf,count);
else
rv = ::lgetxattr(fullpath.c_str(),attrname,buf,count);
rv = _lgetxattr(fullpath,attrname,buf,count);
return ((rv == -1) ? -errno : rv);
#else
return -ENOTSUP;
#endif
return rv;
}
namespace mergerfs

8
src/str.cpp
View File

@ -139,4 +139,12 @@ namespace str
++si;
}
}
bool
isprefix(const string &s0,
const string &s1)
{
return ((s0.size() >= s1.size()) &&
(s0.compare(0,s1.size(),s1) == 0));
}
}

4
src/str.hpp
View File

@ -54,4 +54,8 @@ namespace str
void
erase_fnmatches(const std::vector<std::string> &pattern,
std::vector<std::string> &strs);
bool
isprefix(const std::string &s0,
const std::string &s1);
}
Write Preview
Loading…
Cancel
Save