diff options
author | Daniel Hill <daniel@gluo.nz> | 2022-03-15 21:36:33 +1300 |
---|---|---|
committer | Kent Overstreet <kent.overstreet@linux.dev> | 2023-10-22 17:09:32 -0400 |
commit | 104c69745fdf7e5f8aa022f60bc9d568987bd8b8 (patch) | |
tree | 09fc07cf3d1bbe991c7a586fbac4ee24c31d1b98 /fs/bcachefs/sysfs.c | |
parent | 1f93726e6347938343190913cb959623e67ecf78 (diff) | |
download | linux-104c69745fdf7e5f8aa022f60bc9d568987bd8b8.tar.gz linux-104c69745fdf7e5f8aa022f60bc9d568987bd8b8.tar.bz2 linux-104c69745fdf7e5f8aa022f60bc9d568987bd8b8.zip |
bcachefs: Add persistent counters
This adds a new superblock field for persisting counters
and adds a sysfs interface in counters/ exposing these counters.
The superblock field is ignored by older versions letting us avoid
an on disk version bump.
Each sysfs file outputs a counter that tracks since filesystem
creation and a counter for the current mount session.
Signed-off-by: Daniel Hill <daniel@gluo.nz>
Signed-off-by: Kent Overstreet <kent.overstreet@linux.dev>
Diffstat (limited to 'fs/bcachefs/sysfs.c')
-rw-r--r-- | fs/bcachefs/sysfs.c | 47 |
1 files changed, 46 insertions, 1 deletions
diff --git a/fs/bcachefs/sysfs.c b/fs/bcachefs/sysfs.c index 24180d98fe81..6b5b20d18012 100644 --- a/fs/bcachefs/sysfs.c +++ b/fs/bcachefs/sysfs.c @@ -40,7 +40,7 @@ #include "util.h" #define SYSFS_OPS(type) \ -struct sysfs_ops type ## _sysfs_ops = { \ +const struct sysfs_ops type ## _sysfs_ops = { \ .show = type ## _show, \ .store = type ## _store \ } @@ -195,6 +195,10 @@ read_attribute(extent_migrate_done); read_attribute(extent_migrate_raced); read_attribute(bucket_alloc_fail); +#define x(t, n, ...) read_attribute(t); +BCH_PERSISTENT_COUNTERS() +#undef x + rw_attribute(discard); rw_attribute(label); @@ -551,6 +555,47 @@ struct attribute *bch2_fs_files[] = { NULL }; +/* counters dir */ + +SHOW(bch2_fs_counters) +{ + struct bch_fs *c = container_of(kobj, struct bch_fs, counters_kobj); + u64 counter = 0; + u64 counter_since_mount = 0; + + out->tabstops[0] = 32; + #define x(t, ...) \ + if (attr == &sysfs_##t) { \ + counter = percpu_u64_get(&c->counters[BCH_COUNTER_##t]);\ + counter_since_mount = counter - c->counters_on_mount[BCH_COUNTER_##t];\ + pr_buf(out, "since mount:"); \ + pr_tab(out); \ + bch2_hprint(out, counter_since_mount << 9); \ + pr_newline(out); \ + \ + pr_buf(out, "since filesystem creation:"); \ + pr_tab(out); \ + bch2_hprint(out, counter << 9); \ + pr_newline(out); \ + } + BCH_PERSISTENT_COUNTERS() + #undef x + return 0; +} + +STORE(bch2_fs_counters) { + return 0; +} + +SYSFS_OPS(bch2_fs_counters); + +struct attribute *bch2_fs_counters_files[] = { +#define x(t, ...) \ + &sysfs_##t, + BCH_PERSISTENT_COUNTERS() +#undef x + NULL +}; /* internal dir - just a wrapper */ SHOW(bch2_fs_internal) |