diff options
author | Paulo Alcantara (SUSE) <pc@cjr.nz> | 2019-12-04 23:38:00 +0300 |
---|---|---|
committer | Steve French <stfrench@microsoft.com> | 2020-01-27 04:24:16 +0300 |
commit | 345c1a4a9e09dc5842b7bbb6728a77910db69c52 (patch) | |
tree | c7f2263f146a45f864e291e8ef24127e406c1404 /fs/cifs/dfs_cache.c | |
parent | 199c6bdfb04b71d88a7765e08285885fbca60df4 (diff) | |
download | linux-345c1a4a9e09dc5842b7bbb6728a77910db69c52.tar.xz |
cifs: Introduce helpers for finding TCP connection
Add helpers for finding TCP connections that are good candidates for
being used by DFS refresh worker.
Signed-off-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs/cifs/dfs_cache.c')
-rw-r--r-- | fs/cifs/dfs_cache.c | 44 |
1 files changed, 31 insertions, 13 deletions
diff --git a/fs/cifs/dfs_cache.c b/fs/cifs/dfs_cache.c index 49c5f045270f..e889608e5e13 100644 --- a/fs/cifs/dfs_cache.c +++ b/fs/cifs/dfs_cache.c @@ -1305,6 +1305,30 @@ static char *get_dfs_root(const char *path) return npath; } +static inline void put_tcp_server(struct TCP_Server_Info *server) +{ + cifs_put_tcp_session(server, 0); +} + +static struct TCP_Server_Info *get_tcp_server(struct smb_vol *vol) +{ + struct TCP_Server_Info *server; + + server = cifs_find_tcp_session(vol); + if (IS_ERR_OR_NULL(server)) + return NULL; + + spin_lock(&GlobalMid_Lock); + if (server->tcpStatus != CifsGood) { + spin_unlock(&GlobalMid_Lock); + put_tcp_server(server); + return NULL; + } + spin_unlock(&GlobalMid_Lock); + + return server; +} + /* Find root SMB session out of a DFS link path */ static struct cifs_ses *find_root_ses(struct vol_info *vi, struct cifs_tcon *tcon, @@ -1347,13 +1371,8 @@ static struct cifs_ses *find_root_ses(struct vol_info *vi, goto out; } - server = cifs_find_tcp_session(&vol); - if (IS_ERR_OR_NULL(server)) { - ses = ERR_PTR(-EHOSTDOWN); - goto out; - } - if (server->tcpStatus != CifsGood) { - cifs_put_tcp_session(server, 0); + server = get_tcp_server(&vol); + if (!server) { ses = ERR_PTR(-EHOSTDOWN); goto out; } @@ -1451,19 +1470,18 @@ static void refresh_cache_worker(struct work_struct *work) mutex_lock(&vol_lock); list_for_each_entry(vi, &vol_list, list) { - server = cifs_find_tcp_session(&vi->smb_vol); - if (IS_ERR_OR_NULL(server)) + server = get_tcp_server(&vi->smb_vol); + if (!server) continue; - if (server->tcpStatus != CifsGood) - goto next; + get_tcons(server, &list); list_for_each_entry_safe(tcon, ntcon, &list, ulist) { refresh_tcon(vi, tcon); list_del_init(&tcon->ulist); cifs_put_tcon(tcon); } -next: - cifs_put_tcp_session(server, 0); + + put_tcp_server(server); } queue_delayed_work(dfscache_wq, &refresh_task, cache_ttl * HZ); mutex_unlock(&vol_lock); |