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cifs: refresh root referrals 

Also refresh cached root referrals so the other cached referrals may
have a better chance to have a working root server to issue the
referrals on.

Signed-off-by: Paulo Alcantara (SUSE) <pc@cjr.nz>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Paulo Alcantara 2022-12-13 11:30:30 -03:00 committed by Steve French
parent 6916881f44
commit 8332858569
1 changed files with 24 additions and 20 deletions
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42
fs/cifs/dfs_cache.c
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@ -1346,14 +1346,15 @@ static void mark_for_reconnect_if_needed(struct cifs_tcon *tcon, struct dfs_cach
/* Refresh dfs referral of tcon and mark it for reconnect if needed */
static int __refresh_tcon(const char *path, struct cifs_tcon *tcon, bool force_refresh)
{
struct cifs_ses *ses = CIFS_DFS_ROOT_SES(tcon->ses);
struct cache_entry *ce;
struct dfs_info3_param *refs = NULL;
int numrefs = 0;
bool needs_refresh = false;
struct dfs_cache_tgt_list tl = DFS_CACHE_TGT_LIST_INIT(tl);
int rc = 0;
struct cifs_ses *ses = CIFS_DFS_ROOT_SES(tcon->ses);
struct cifs_tcon *ipc = ses->tcon_ipc;
struct dfs_info3_param *refs = NULL;
bool needs_refresh = false;
struct cache_entry *ce;
unsigned int xid;
int numrefs = 0;
int rc = 0;
xid = get_xid();
@ -1372,6 +1373,14 @@ static int __refresh_tcon(const char *path, struct cifs_tcon *tcon, bool force_r
goto out;
}
spin_lock(&ipc->tc_lock);
if (ses->ses_status != SES_GOOD || ipc->status != TID_GOOD) {
spin_unlock(&ipc->tc_lock);
cifs_dbg(FYI, "%s: skip cache refresh due to disconnected ipc\n", __func__);
goto out;
}
spin_unlock(&ipc->tc_lock);
rc = get_dfs_referral(xid, ses, path, &refs, &numrefs);
if (!rc) {
/* Create or update a cache entry with the new referral */
@ -1457,9 +1466,9 @@ int dfs_cache_remount_fs(struct cifs_sb_info *cifs_sb)
static void refresh_cache_worker(struct work_struct *work)
{
struct TCP_Server_Info *server;
struct cifs_ses *ses;
struct cifs_tcon *tcon, *ntcon;
struct list_head tcons;
struct cifs_ses *ses;
INIT_LIST_HEAD(&tcons);
@ -1469,23 +1478,15 @@ static void refresh_cache_worker(struct work_struct *work)
continue;
list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) {
struct cifs_ses *root_ses = CIFS_DFS_ROOT_SES(ses);
spin_lock(&root_ses->ses_lock);
if (root_ses->ses_status != SES_GOOD) {
spin_unlock(&root_ses->ses_lock);
continue;
if (ses->tcon_ipc) {
ses->ses_count++;
list_add_tail(&ses->tcon_ipc->ulist, &tcons);
}
spin_unlock(&root_ses->ses_lock);
list_for_each_entry(tcon, &ses->tcon_list, tcon_list) {
spin_lock(&tcon->tc_lock);
if (!tcon->ipc && tcon->status != TID_NEW &&
tcon->status != TID_NEED_TCON) {
if (!tcon->ipc) {
tcon->tc_count++;
list_add_tail(&tcon->ulist, &tcons);
}
spin_unlock(&tcon->tc_lock);
}
}
}
@ -1501,6 +1502,9 @@ static void refresh_cache_worker(struct work_struct *work)
__refresh_tcon(server->leaf_fullpath + 1, tcon, false);
mutex_unlock(&server->refpath_lock);
if (tcon->ipc)
cifs_put_smb_ses(tcon->ses);
else
cifs_put_tcon(tcon);
}