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Misc cleanup (#1486) 

* Skip non-directories when loading branches
* Warn if branch doesn't exist
* Add braces to globbing
pull/1488/head
trapexit 3 months ago
committed by GitHub
parent
be49dbe1bd
commit
264c5600f8
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3 changed files with 94 additions and 173 deletions
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  1. 18
      src/branches.cpp
  2. 9
      src/fs_glob.cpp
  3. 216
      src/option_parser.cpp

18
src/branches.cpp
View File

@ -192,11 +192,27 @@ namespace l
fs::glob(glob,&paths);
if(paths.empty())
{
SysLog::notice("branch glob `{}` found no matches,"
" adding the literal to branches",glob);
paths.push_back(glob);
}
fs::realpathize(&paths);
for(auto &path : paths)
{
std::error_code ec;
if(!std::filesystem::exists(path))
{
SysLog::notice("branch `{}` does not currently exist",path);
}
else if(!std::filesystem::is_directory(path,ec))
{
SysLog::warning("branch `{}` is not a directory, skipping",path);
continue;
}
branch.path = path;
branches_->emplace_back(branch);
}
@ -432,7 +448,7 @@ Branches::find_and_set_mode_ro()
if(!fs::is_rofs_but_not_mounted_ro(branch.path))
continue;
SysLog::warning("Branch {} found to be readonly - setting its mode to RO",
SysLog::warning("branch `{}` found to be readonly - setting its mode=RO",
branch.path);
branch.mode = Branch::Mode::RO;

9
src/fs_glob.cpp
View File

@ -23,6 +23,13 @@
using std::string;
using std::vector;
#ifndef GLOB_BRACE
#define GLOB_BRACE 0
#endif
#ifndef GLOB_ONLYDIR
#define GLOB_ONLYDIR 0
#endif
namespace fs
{
@ -33,7 +40,7 @@ namespace fs
int flags;
glob_t gbuf = {0};
flags = GLOB_NOCHECK;
flags = (GLOB_BRACE|GLOB_ONLYDIR);
::glob(pattern_.c_str(),flags,NULL,&gbuf);
for(size_t i = 0; i < gbuf.gl_pathc; i++)

216
src/option_parser.cpp
View File

@ -59,7 +59,7 @@ enum
static
void
set_option(const std::string &option_,
_set_option(const std::string &option_,
fuse_args *args_)
{
@ -69,7 +69,7 @@ set_option(const std::string &option_,
static
void
set_kv_option(const std::string &key_,
_set_kv_option(const std::string &key_,
const std::string &val_,
fuse_args *args_)
{
@ -77,12 +77,12 @@ set_kv_option(const std::string &key_,
option = key_ + '=' + val_;
set_option(option,args_);
::_set_option(option,args_);
}
static
void
set_fuse_threads(Config::Write &cfg_)
_set_fuse_threads(Config::Write &cfg_)
{
fuse_config_set_read_thread_count(cfg_->fuse_read_thread_count);
fuse_config_set_process_thread_count(cfg_->fuse_process_thread_count);
@ -92,7 +92,7 @@ set_fuse_threads(Config::Write &cfg_)
static
void
set_fsname(Config::Write &cfg_,
_set_fsname(Config::Write &cfg_,
fuse_args *args_)
{
if(cfg_->fsname->empty())
@ -105,33 +105,33 @@ set_fsname(Config::Write &cfg_,
cfg_->fsname = str::remove_common_prefix_and_join(paths,':');
}
set_kv_option("fsname",cfg_->fsname,args_);
::_set_kv_option("fsname",cfg_->fsname,args_);
}
static
void
set_subtype(fuse_args *args_)
_set_subtype(fuse_args *args_)
{
set_kv_option("subtype","mergerfs",args_);
::_set_kv_option("subtype","mergerfs",args_);
}
static
void
set_default_options(fuse_args *args_,
_set_default_options(fuse_args *args_,
Config::Write &cfg_)
{
if(cfg_->kernel_permissions_check)
set_option("default_permissions",args_);
::_set_option("default_permissions",args_);
if(geteuid() == 0)
set_option("allow_other",args_);
::_set_option("allow_other",args_);
else
SysLog::notice("not auto setting allow_other since not running as root");
}
static
bool
should_ignore(const std::string &key_)
_should_ignore(const std::string &key_)
{
constexpr const std::array<std::string_view,13> ignored_keys =
{
@ -161,7 +161,7 @@ should_ignore(const std::string &key_)
static
int
parse_and_process_kv_arg(Config::Write &cfg_,
_parse_and_process_kv_arg(Config::Write &cfg_,
Config::ErrVec *errs_,
const std::string &key_,
const std::string &val_)
@ -189,7 +189,7 @@ parse_and_process_kv_arg(Config::Write &cfg_,
val = "true";
ef(key == "sync_read" && val.empty())
{key = "async_read", val = "false";}
ef(::should_ignore(key_))
ef(::_should_ignore(key_))
return 0;
if(cfg_->has_key(key) == false)
@ -215,7 +215,7 @@ process_opt(Config::Write &cfg_,
key = str::trim(key);
val = str::trim(val);
return parse_and_process_kv_arg(cfg_,errs_,key,val);
return ::_parse_and_process_kv_arg(cfg_,errs_,key,val);
}
static
@ -254,120 +254,38 @@ process_mount(Config::Write &cfg_,
static
void
usage(void)
_postprocess_passthrough(Config::Write &cfg_)
{
std::cout <<
"Usage: mergerfs [options] <branches> <destpath>\n"
"\n"
" -o [opt,...] mount options\n"
" -h --help print help\n"
" -v --version print version\n"
" -f run mergerfs in foreground\n"
" -d, -o debug enable debug output (enables -f)\n"
if(cfg_->passthrough == Passthrough::ENUM::OFF)
return;
if(cfg_->cache_files == CacheFiles::ENUM::OFF)
{
SysLog::warning("'cache.files' can not be 'off' when using 'passthrough'."
" Setting 'cache.files=auto-full'");
cfg_->cache_files = CacheFiles::ENUM::AUTO_FULL;
}
if(cfg_->writeback_cache == true)
{
SysLog::warning("'cache.writeback' can not be enabled when using 'passthrough'."
" Setting 'cache.writeback=false'");
cfg_->writeback_cache = false;
}
if(cfg_->moveonenospc.enabled == true)
{
SysLog::warning("`moveonenospc` will not function when `passthrough` is enabled");
}
}
static
void
_usage(void)
{
fmt::print("Usage: mergerfs [options] <branches> <mountpoint>\n"
"\n"
"mergerfs options:\n"
" <branches> ':' delimited list of directories. Supports\n"
" shell globbing (must be escaped in shell)\n"
" -o config=FILE Read options from file in key=val format\n"
" -o func.FUNC=POLICY Set function FUNC to policy POLICY\n"
" -o category.CAT=POLICY Set functions in category CAT to POLICY\n"
" -o fsname=STR Sets the name of the filesystem.\n"
" -o read-thread-count=INT\n"
" Number of threads used to read from FUSE (and process)\n"
" * 0 = number of logical cores\n"
" * negative value = number of logical cores / abs(value)\n"
" * -1 in combination with process-thread-count=-1 will\n"
" split thread count among read and process threads\n"
" default=0\n"
" -o process-thread-count=INT\n"
" Same as read-thread-count but for FUSE message processing\n"
" If not set then read threads will do both read and process\n"
" -o cache.statfs=INT 'statfs' cache timeout in seconds. Used by\n"
" policies. default = 0 (disabled)\n"
" -o cache.files=libfuse|off|partial|full|auto-full|per-process\n"
" * libfuse: Use direct_io, kernel_cache, auto_cache\n"
" values directly\n"
" * off: Disable page caching\n"
" * partial: Clear page cache on file open\n"
" * full: Keep cache on file open\n"
" * auto-full: Keep cache if mtime & size not changed\n"
" * per-process: Enable caching for only for processes\n"
" which comm name match value in cache.files.process-names\n"
" default = libfuse\n"
" -o cache.files.process-names=STRLIST\n"
" Pipe delimited list of process comm names.\n"
" defulat=rtorrent|qbittorrent-nox\n"
" -o cache.writeback=BOOL\n"
" Enable kernel writeback caching (if supported)\n"
" cache.files must be enabled as well.\n"
" default = false\n"
" -o cache.symlinks=BOOL\n"
" Enable kernel caching of symlinks (if supported)\n"
" default = false\n"
" -o cache.readdir=BOOL\n"
" Enable kernel caching readdir (if supported)\n"
" default = false\n"
" -o cache.attr=INT File attribute cache timeout in seconds.\n"
" default = 1\n"
" -o cache.entry=INT File name lookup cache timeout in seconds.\n"
" default = 1\n"
" -o cache.negative_entry=INT\n"
" Negative file name lookup cache timeout in\n"
" seconds. default = 0\n"
" -o inodecalc=passthrough|path-hash|devino-hash|hybrid-hash\n"
" Selects the inode calculation algorithm.\n"
" default = hybrid-hash\n"
" -o minfreespace=INT Minimum free space needed for certain policies.\n"
" default = 4G\n"
" -o moveonenospc=BOOL Try to move file to another drive when ENOSPC\n"
" on write. default = false\n"
" -o dropcacheonclose=BOOL\n"
" When a file is closed suggest to OS it drop\n"
" the file's cache. This is useful when using\n"
" 'cache.files'. default = false\n"
" -o symlinkify=BOOL Read-only files, after a timeout, will be turned\n"
" into symlinks. Read docs for limitations and\n"
" possible issues. default = false\n"
" -o symlinkify_timeout=INT\n"
" Timeout in seconds before files turn to symlinks.\n"
" default = 3600\n"
" -o nullrw=BOOL Disables reads and writes. For benchmarking.\n"
" default = false\n"
" -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 nfsopenhack=off|git|all\n"
" A workaround for exporting mergerfs over NFS\n"
" where there are issues with creating files for\n"
" write while setting the mode to read-only.\n"
" default = off\n"
" -o security_capability=BOOL\n"
" When disabled return ENOATTR when the xattr\n"
" security.capability is queried. default = true\n"
" -o xattr=passthrough|noattr|nosys\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. nosys will respond as if not\n"
" supported or disabled. default = passthrough\n"
" -o statfs=base|full When set to 'base' statfs will use all branches\n"
" when performing statfs calculations. 'full' will\n"
" only include branches on which that path is\n"
" available. default = base\n"
" -o statfs_ignore=none|ro|nc\n"
" 'ro' will cause statfs calculations to ignore\n"
" available space for branches mounted or tagged\n"
" as 'read only' or 'no create'. 'nc' will ignore\n"
" available space for branches tagged as\n"
" 'no create'. default = none\n"
" -o posix_acl=BOOL Enable POSIX ACL support. default = false\n"
" -o async_read=BOOL If disabled or unavailable the kernel will\n"
" ensure there is at most one pending read \n"
" request per file and will attempt to order\n"
" requests by offset. default = true\n"
<< std::endl;
"Visit https://trapexit.github.io/mergerfs for options.\n\n");
}
static
@ -392,15 +310,16 @@ option_processor(void *data_,
return process_mount(cfg,errs,arg_);
case MERGERFS_OPT_HELP:
usage();
::_usage();
exit(0);
case MERGERFS_OPT_VERSION:
fmt::print("mergerfs v{}\n\n"
"https://github.com/trapexit/mergerfs\n"
"https://trapexit.github.io/mergerfs\n"
"https://github.com/trapexit/support\n\n"
"ISC License (ISC)\n\n"
"Copyright 2023, Antonio SJ Musumeci <trapexit@spawn.link>\n\n"
"Copyright 2025, Antonio SJ Musumeci <trapexit@spawn.link>\n\n"
"Permission to use, copy, modify, and/or distribute this software for\n"
"any purpose with or without fee is hereby granted, provided that the\n"
"above copyright notice and this permission notice appear in all\n"
@ -426,7 +345,7 @@ option_processor(void *data_,
static
void
check_for_mount_loop(Config::Write &cfg_,
_check_for_mount_loop(Config::Write &cfg_,
Config::ErrVec *errs_)
{
fs::Path mount;
@ -441,7 +360,8 @@ check_for_mount_loop(Config::Write &cfg_,
{
std::string errstr;
errstr = fmt::format("branches can not include the mountpoint: {}",branch.string());
errstr = fmt::format("branches can not include the mountpoint: {}",
branch.string());
errs_->push_back({0,errstr});
}
}
@ -474,34 +394,12 @@ namespace options
if(cfg->mountpoint->empty())
errs_->push_back({0,"mountpoint not set"});
if(cfg->passthrough != Passthrough::ENUM::OFF)
{
if(cfg->cache_files == CacheFiles::ENUM::OFF)
{
SysLog::warning("'cache.files' can not be 'off' when using 'passthrough'."
" Setting 'cache.files=auto-full'");
cfg->cache_files = CacheFiles::ENUM::AUTO_FULL;
}
if(cfg->writeback_cache == true)
{
SysLog::warning("'cache.writeback' can not be enabled when using 'passthrough'."
" Setting 'cache.writeback=false'");
cfg->writeback_cache = false;
}
if(cfg->moveonenospc.enabled == true)
{
SysLog::warning("`moveonenospc` will not function when `passthrough` is enabled");
}
}
check_for_mount_loop(cfg,errs_);
set_default_options(args_,cfg);
set_fsname(cfg,args_);
set_subtype(args_);
set_fuse_threads(cfg);
::_postprocess_passthrough(cfg);
::_check_for_mount_loop(cfg,errs_);
::_set_default_options(args_,cfg);
::_set_fsname(cfg,args_);
::_set_subtype(args_);
::_set_fuse_threads(cfg);
cfg->finish_initializing();
}

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