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| author | David Howells <dhowells@redhat.com> | 2024-04-04 13:51:36 +0100 |
|---|---|---|
| committer | Steve French <stfrench@microsoft.com> | 2024-04-19 16:02:09 -0500 |
| commit | afc23febd51c7e24361e3a9c09f3e892eb0a41ea (patch) | |
| tree | 9859f9daaf1dcd518c60df378ec8c09b32f209eb /fs/smb/client/smb2ops.c | |
| parent | dad80c6bff770d25f67ec25fe011730e4a463008 (diff) | |
| download | linux-stable-afc23febd51c7e24361e3a9c09f3e892eb0a41ea.tar.gz linux-stable-afc23febd51c7e24361e3a9c09f3e892eb0a41ea.tar.bz2 linux-stable-afc23febd51c7e24361e3a9c09f3e892eb0a41ea.zip | |
cifs: Add tracing for the cifs_tcon struct refcounting
Add tracing for the refcounting/lifecycle of the cifs_tcon struct, marking
different events with different labels and giving each tcon its own debug
ID so that the tracelines corresponding to individual tcons can be
distinguished. This can be enabled with:
echo 1 >/sys/kernel/debug/tracing/events/cifs/smb3_tcon_ref/enable
Signed-off-by: David Howells <dhowells@redhat.com>
Acked-by: Paulo Alcantara (Red Hat) <pc@manguebit.com>
cc: Shyam Prasad N <nspmangalore@gmail.com>
cc: linux-cifs@vger.kernel.org
cc: linux-fsdevel@vger.kernel.org
Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs/smb/client/smb2ops.c')
| -rw-r--r-- | fs/smb/client/smb2ops.c | 7 |
1 files changed, 6 insertions, 1 deletions
diff --git a/fs/smb/client/smb2ops.c b/fs/smb/client/smb2ops.c index 78c94d0350fe..28f0b7d19d53 100644 --- a/fs/smb/client/smb2ops.c +++ b/fs/smb/client/smb2ops.c @@ -2915,8 +2915,11 @@ smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses, tcon = list_first_entry_or_null(&ses->tcon_list, struct cifs_tcon, tcon_list); - if (tcon) + if (tcon) { tcon->tc_count++; + trace_smb3_tcon_ref(tcon->debug_id, tcon->tc_count, + netfs_trace_tcon_ref_get_dfs_refer); + } spin_unlock(&cifs_tcp_ses_lock); } @@ -2980,6 +2983,8 @@ smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses, /* ipc tcons are not refcounted */ spin_lock(&cifs_tcp_ses_lock); tcon->tc_count--; + trace_smb3_tcon_ref(tcon->debug_id, tcon->tc_count, + netfs_trace_tcon_ref_dec_dfs_refer); /* tc_count can never go negative */ WARN_ON(tcon->tc_count < 0); spin_unlock(&cifs_tcp_ses_lock); |