diff options
| author |   Bharath SM <bharathsm@microsoft.com> | 2025-09-29 15:57:46 -0500 |
|---|---|---|
| committer |   Steve French <stfrench@microsoft.com> | 2025-10-01 21:49:53 -0500 |
| commit | 63eb8bd6c81d84a23fdc18fffd604e3ea38bb96c (patch) | |
| tree | a9c7c02f27c2e621b34286cea8122284ad27ed08 /fs/smb/client/cached_dir.c | |
| parent | smb: client: add drop_dir_cache module parameter to invalidate cached dirents (diff) | |
| download | wireguard-linux-63eb8bd6c81d84a23fdc18fffd604e3ea38bb96c.tar.xz wireguard-linux-63eb8bd6c81d84a23fdc18fffd604e3ea38bb96c.zip | |
smb: client: account smb directory cache usage and per-tcon totals
Add lightweight accounting for directory lease cache usage
to aid debugging and limiting cache size in future. Track
per-directory entry/byte counts and maintain per-tcon
aggregates. Also expose the totals in /proc/fs/cifs/open_dirs.
Signed-off-by: Bharath SM <bharathsm@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs/smb/client/cached_dir.c')
| -rw-r--r-- | fs/smb/client/cached_dir.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/fs/smb/client/cached_dir.c b/fs/smb/client/cached_dir.c index b69daeb1301b..b6f538a1d5af 100644 --- a/fs/smb/client/cached_dir.c +++ b/fs/smb/client/cached_dir.c @@ -697,6 +697,21 @@ static void free_cached_dir(struct cached_fid *cfid) kfree(dirent); } + /* adjust tcon-level counters and reset per-dir accounting */ + if (cfid->cfids) { + if (cfid->dirents.entries_count) + atomic_long_sub((long)cfid->dirents.entries_count, + &cfid->cfids->total_dirents_entries); + if (cfid->dirents.bytes_used) { + atomic64_sub((long long)cfid->dirents.bytes_used, + &cfid->cfids->total_dirents_bytes); + atomic64_sub((long long)cfid->dirents.bytes_used, + &cifs_dircache_bytes_used); + } + } + cfid->dirents.entries_count = 0; + cfid->dirents.bytes_used = 0; + kfree(cfid->path); cfid->path = NULL; kfree(cfid); @@ -792,6 +807,9 @@ struct cached_fids *init_cached_dirs(void) queue_delayed_work(cfid_put_wq, &cfids->laundromat_work, dir_cache_timeout * HZ); + atomic_long_set(&cfids->total_dirents_entries, 0); + atomic64_set(&cfids->total_dirents_bytes, 0); + return cfids; } |