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| author |   Paulo Alcantara <pc@cjr.nz> | 2020-05-19 15:38:28 -0300 |
|---|---|---|
| committer |   Steve French <stfrench@microsoft.com> | 2020-06-01 00:10:18 -0500 |
| commit | e4af35fa55b072190711c11e2bfff8326d313948 (patch) | |
| tree | 9defc68db1e5f5b7de5581b63ec0efb67eb5422f /fs/cifs/cifsproto.h | |
| parent | cifs: set up next DFS target before generic_ip_connect() (diff) | |
| download | linux-dev-e4af35fa55b072190711c11e2bfff8326d313948.tar.xz linux-dev-e4af35fa55b072190711c11e2bfff8326d313948.zip | |
cifs: handle hostnames that resolve to same ip in failover
In order to support reconnect to hostnames that resolve to same ip
address, besides relying on the currently set hostname to match DFS
targets, attempt to resolve the targets and then match their addresses
with the reconnected server ip address.
For instance, if we have two hostnames "FOO" and "BAR", and both
resolve to the same ip address, we would be able to handle failover in
DFS paths like
\\FOO\dfs\link1 -> [ \BAZ\share2 (*), \BAR\share1 ]
\\FOO\dfs\link2 -> [ \BAZ\share2 (*), \FOO\share1 ]
so when "BAZ" is no longer accessible, link1 and link2 would get
reconnected despite having different target hostnames.
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/cifsproto.h')
| -rw-r--r-- | fs/cifs/cifsproto.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h index 12a895e02db4..311d8e86c5a8 100644 --- a/fs/cifs/cifsproto.h +++ b/fs/cifs/cifsproto.h @@ -89,6 +89,7 @@ extern void cifs_mid_q_entry_release(struct mid_q_entry *midEntry); extern void cifs_wake_up_task(struct mid_q_entry *mid); extern int cifs_handle_standard(struct TCP_Server_Info *server, struct mid_q_entry *mid); +extern bool cifs_match_ipaddr(struct sockaddr *srcaddr, struct sockaddr *rhs); extern int cifs_discard_remaining_data(struct TCP_Server_Info *server); extern int cifs_call_async(struct TCP_Server_Info *server, struct smb_rqst *rqst, @@ -616,6 +617,10 @@ static inline int get_dfs_path(const unsigned int xid, struct cifs_ses *ses, return dfs_cache_find(xid, ses, nls_codepage, remap, old_path, referral, NULL); } + +int match_target_ip(struct TCP_Server_Info *server, + const char *share, size_t share_len, + bool *result); #endif static inline int cifs_create_options(struct cifs_sb_info *cifs_sb, int options) |