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Added notsup_compat_dir option

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This commit is contained in:
Takeshi Nakatani 2017-05-05 17:28:29 +00:00
parent c5677b4726
commit 3ac39d61f8
3 changed files with 50 additions and 8 deletions
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11
doc/man/s3fs.1
View File

@ -252,6 +252,17 @@ https://curl.haxx.se/docs/ssl-ciphers.html
s3fs complements lack of information about file/directory mode if a file or a directory object does not have x-amz-meta-mode header.
As default, s3fs does not complements stat information for a object, then the object will not be able to be allowed to list/modify.
.TP
\fB\-o\fR notsup_compat_dir (not support compatibility directory types)
As a default, s3fs supports objects of the directory type as much as possible and recognizes them as directories.
Objects that can be recognized as directory objects are "dir/", "dir", "dir_$folder$", and there is a file object that does not have a directory object but contains that directory path.
s3fs needs redundant communication to support all these directory types.
The object as the directory created by s3fs is "dir/".
By restricting s3fs to recognize only "dir/" as a directory, communication traffic can be reduced.
This option is used to give this restriction to s3fs.
However, if there is a directory object other than "dir/" in the bucket, specifying this option is not recommended.
s3fs may not be able to recognize the object correctly if an object created by s3fs exists in the bucket.
Please use this option when the directory in the bucket is only "dir/" object.
.TP
\fB\-o\fR dbglevel (default="crit")
Set the debug message level. set value as crit(critical), err(error), warn(warning), info(information) to debug level. default debug level is critical.
If s3fs run with "-d" option, the debug level is set information.

29
src/s3fs.cpp
View File

@ -127,6 +127,7 @@ static bool create_bucket = false;
static int64_t singlepart_copy_limit = FIVE_GB;
static bool is_specified_endpoint = false;
static int s3fs_init_deferred_exit_status = 0;
static bool support_compat_dir = true;// default supports compatibility directory type
//-------------------------------------------------------------------
// Static functions : prototype
@ -272,6 +273,12 @@ static s3fs_log_level bumpup_s3fs_log_level(void)
static bool is_special_name_folder_object(const char* path)
{
if(!support_compat_dir){
// s3fs does not support compatibility directory type("_$folder$" etc) now,
// thus always returns false.
return false;
}
if(!path || '\0' == path[0]){
return false;
}
@ -327,7 +334,7 @@ static int chk_dir_object_type(const char* path, string& newpath, string& nowpat
if(0 == (result = get_object_attribute(newpath.c_str(), NULL, pmeta, false, &isforce))){
// Found "dir/" cache --> Check for "_$folder$", "no dir object"
nowcache = newpath;
if(is_special_name_folder_object(newpath.c_str())){
if(is_special_name_folder_object(newpath.c_str())){ // check support_compat_dir in this function
// "_$folder$" type.
(*pType) = DIRTYPE_FOLDER;
nowpath = newpath.substr(0, newpath.length() - 1) + "_$folder$"; // cut and add
@ -345,8 +352,8 @@ static int chk_dir_object_type(const char* path, string& newpath, string& nowpat
(*pType) = DIRTYPE_OLD;
}
}
}else{
// Check "dir"
}else if(support_compat_dir){
// Check "dir" when support_compat_dir is enabled
nowpath = newpath.substr(0, newpath.length() - 1);
if(0 == (result = get_object_attribute(nowpath.c_str(), NULL, pmeta, false, &isforce))){
// Found "dir" cache --> this case is only "dir" type.
@ -361,6 +368,7 @@ static int chk_dir_object_type(const char* path, string& newpath, string& nowpat
}
}else{
// Not found cache --> check for "_$folder$" and "no dir object".
// (come here is that support_compat_dir is enabled)
nowcache = ""; // This case is no cache.
nowpath += "_$folder$";
if(is_special_name_folder_object(nowpath.c_str())){
@ -424,7 +432,7 @@ static int get_object_attribute(const char* path, struct stat* pstbuf, headers_t
pisforce = (NULL != pisforce ? pisforce : &forcedir);
(*pisforce) = false;
strpath = path;
if(overcheck && string::npos != (Pos = strpath.find("_$folder$", 0))){
if(support_compat_dir && overcheck && string::npos != (Pos = strpath.find("_$folder$", 0))){
strpath = strpath.substr(0, Pos);
strpath += "/";
}
@ -445,13 +453,14 @@ static int get_object_attribute(const char* path, struct stat* pstbuf, headers_t
// if not found target path object, do over checking
if(0 != result){
if(overcheck){
if('/' != strpath[strpath.length() - 1]){
// when support_compat_dir is disabled, strpath maybe have "_$folder$".
if('/' != strpath[strpath.length() - 1] && string::npos == strpath.find("_$folder$", 0)){
// now path is "object", do check "object/" for over checking
strpath += "/";
result = s3fscurl.HeadRequest(strpath.c_str(), (*pheader));
s3fscurl.DestroyCurlHandle();
}
if(0 != result){
if(support_compat_dir && 0 != result){
// now path is "object/", do check "object_$folder$" for over checking
strpath = strpath.substr(0, strpath.length() - 1);
strpath += "_$folder$";
@ -466,7 +475,7 @@ static int get_object_attribute(const char* path, struct stat* pstbuf, headers_t
}
}
}
if(0 != result && string::npos == strpath.find("_$folder$", 0)){
if(support_compat_dir && 0 != result && string::npos == strpath.find("_$folder$", 0)){
// now path is "object" or "object/", do check "no dir object" which is not object but has only children.
if('/' == strpath[strpath.length() - 1]){
strpath = strpath.substr(0, strpath.length() - 1);
@ -479,7 +488,7 @@ static int get_object_attribute(const char* path, struct stat* pstbuf, headers_t
}
}
}else{
if('/' != strpath[strpath.length() - 1] && string::npos == strpath.find("_$folder$", 0) && is_need_check_obj_detail(*pheader)){
if(support_compat_dir && '/' != strpath[strpath.length() - 1] && string::npos == strpath.find("_$folder$", 0) && is_need_check_obj_detail(*pheader)){
// check a case of that "object" does not have attribute and "object" is possible to be directory.
if(-ENOTEMPTY == directory_empty(strpath.c_str())){
// found "no dir object".
@ -4666,6 +4675,10 @@ static int my_fuse_opt_proc(void* data, const char* arg, int key, struct fuse_ar
complement_stat = true;
return 0;
}
if(0 == strcmp(arg, "notsup_compat_dir")){
support_compat_dir = false;
return 0;
}
if(0 == strcmp(arg, "enable_content_md5")){
S3fsCurl::SetContentMd5(true);
return 0;

18
src/s3fs_util.cpp
View File

@ -1221,6 +1221,24 @@ void show_help (void)
" for a object, then the object will not be able to be allowed to\n"
" list/modify.\n"
"\n"
" notsup_compat_dir (not support compatibility directory types)\n"
" As a default, s3fs supports objects of the directory type as\n"
" much as possible and recognizes them as directories.\n"
" Objects that can be recognized as directory objects are \"dir/\",\n"
" \"dir\", \"dir_$folder$\", and there is a file object that does\n"
" not have a directory object but contains that directory path.\n"
" s3fs needs redundant communication to support all these\n"
" directory types. The object as the directory created by s3fs\n"
" is \"dir/\". By restricting s3fs to recognize only \"dir/\" as\n"
" a directory, communication traffic can be reduced. This option\n"
" is used to give this restriction to s3fs.\n"
" However, if there is a directory object other than \"dir/\" in\n"
" the bucket, specifying this option is not recommended. s3fs may\n"
" not be able to recognize the object correctly if an object\n"
" created by s3fs exists in the bucket.\n"
" Please use this option when the directory in the bucket is\n"
" only \"dir/\" object.\n"
"\n"
"FUSE/mount Options:\n"
"\n"
" Most of the generic mount options described in 'man mount' are\n"