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| author | David Howells <dhowells@redhat.com> | 2024-04-04 15:51:36 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-05-25 17:22:51 +0300 |
| commit | 07e76ea1799c1ce9626a6c3c11ce1c2de301790e (patch) | |
| tree | c3cc648916730bbf1069f59c0ba1d8bbcfd5fa04 /fs/smb/client/smb2ops.c | |
| parent | 2004e41cd2c418d707fd77b21e4ac38d647e55ef (diff) | |
| download | linux-07e76ea1799c1ce9626a6c3c11ce1c2de301790e.tar.xz | |
cifs: Add tracing for the cifs_tcon struct refcounting
[ Upstream commit afc23febd51c7e24361e3a9c09f3e892eb0a41ea ]
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>
Signed-off-by: Sasha Levin <sashal@kernel.org>
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 df6c6d31236a..66cfce456263 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); |