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feat(dwarfs): add preload_category option

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Marcus Holland-Moritz 2025-04-04 15:50:57 +02:00
parent 85ce5380b5
commit c061a5253d
2 changed files with 12 additions and 0 deletions
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5
doc/dwarfs.md
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@ -115,6 +115,11 @@ options:
system contains directories with entries that only differ in system contains directories with entries that only differ in
case. case.
- `-o preload_category=`*category*:
Preload all blocks from this category when mounting the file
system. This is typically used together with the `mkdwarfs`
"hotness" categorizer.
- `-o (no_)cache_image`: - `-o (no_)cache_image`:
By default, `dwarfs` tries to ensure that the compressed file By default, `dwarfs` tries to ensure that the compressed file
system image will not be cached by the kernel (i.e. the default system image will not be cached by the kernel (i.e. the default

7
tools/src/dwarfs_main.cpp
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@ -169,6 +169,7 @@ struct options {
char const* cachesize_str{nullptr}; // TODO: const?? -> use string? char const* cachesize_str{nullptr}; // TODO: const?? -> use string?
char const* blocksize_str{nullptr}; // TODO: const?? -> use string? char const* blocksize_str{nullptr}; // TODO: const?? -> use string?
char const* readahead_str{nullptr}; // TODO: const?? -> use string? char const* readahead_str{nullptr}; // TODO: const?? -> use string?
char const* preload_category_str{nullptr}; // TODO: const?? -> use string?
char const* debuglevel_str{nullptr}; // TODO: const?? -> use string? char const* debuglevel_str{nullptr}; // TODO: const?? -> use string?
char const* workers_str{nullptr}; // TODO: const?? -> use string? char const* workers_str{nullptr}; // TODO: const?? -> use string?
char const* mlock_str{nullptr}; // TODO: const?? -> use string? char const* mlock_str{nullptr}; // TODO: const?? -> use string?
@ -267,6 +268,7 @@ constexpr std::array dwarfs_opts{
DWARFS_OPT("tidy_interval=%s", cache_tidy_interval_str, 0), DWARFS_OPT("tidy_interval=%s", cache_tidy_interval_str, 0),
DWARFS_OPT("tidy_max_age=%s", cache_tidy_max_age_str, 0), DWARFS_OPT("tidy_max_age=%s", cache_tidy_max_age_str, 0),
DWARFS_OPT("seq_detector=%s", seq_detector_thresh_str, 0), DWARFS_OPT("seq_detector=%s", seq_detector_thresh_str, 0),
DWARFS_OPT("preload_category=%s", preload_category_str, 0),
DWARFS_OPT("enable_nlink", enable_nlink, 1), DWARFS_OPT("enable_nlink", enable_nlink, 1),
DWARFS_OPT("readonly", readonly, 1), DWARFS_OPT("readonly", readonly, 1),
DWARFS_OPT("case_insensitive", case_insensitive, 1), DWARFS_OPT("case_insensitive", case_insensitive, 1),
@ -396,6 +398,10 @@ void op_init_common(void* data) {
// we must do this *after* the fuse driver has forked into background // we must do this *after* the fuse driver has forked into background
userdata.fs.set_cache_tidy_config(tidy); userdata.fs.set_cache_tidy_config(tidy);
if (userdata.opts.preload_category_str) {
userdata.fs.cache_blocks_by_category(userdata.opts.preload_category_str);
}
} }
#if DWARFS_FUSE_LOWLEVEL #if DWARFS_FUSE_LOWLEVEL
@ -1199,6 +1205,7 @@ void usage(std::ostream& os, std::filesystem::path const& progname) {
<< " -o enable_nlink show correct hardlink numbers\n" << " -o enable_nlink show correct hardlink numbers\n"
<< " -o readonly show read-only file system\n" << " -o readonly show read-only file system\n"
<< " -o case_insensitive perform case-insensitive lookups\n" << " -o case_insensitive perform case-insensitive lookups\n"
<< " -o preload_category=NAME preload blocks from this category\n"
<< " -o (no_)cache_image (don't) keep image in kernel cache\n" << " -o (no_)cache_image (don't) keep image in kernel cache\n"
<< " -o (no_)cache_files (don't) keep files in kernel cache\n" << " -o (no_)cache_files (don't) keep files in kernel cache\n"
<< " -o debuglevel=NAME " << logger::all_level_names() << "\n" << " -o debuglevel=NAME " << logger::all_level_names() << "\n"