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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-08-30 11:38:21 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-08-30 11:38:21 -0700 |
| commit | 3edd8db2d53fe6c96ad66248bb1479ae62807268 (patch) | |
| tree | fe4a6cc07e64bddb5af2d0d63ae19bc303828356 | |
| parent | 8bb5021cc2ee5d5dd129a9f2f5ad2bb76eea297d (diff) | |
| parent | e183785f2529b4135f00a0330a3b08e7c86530c8 (diff) | |
| download | linux-visconti-3edd8db2d53fe6c96ad66248bb1479ae62807268.tar.gz | |
Merge tag '5.9-rc2-smb-fix' of git://git.samba.org/sfrench/cifs-2.6
Pull cfis fix from Steve French:
"DFS fix for referral problem when using SMB1"
* tag '5.9-rc2-smb-fix' of git://git.samba.org/sfrench/cifs-2.6:
cifs: fix check of tcon dfs in smb1
| -rw-r--r-- | fs/cifs/cifsglob.h | 15 | ||||
| -rw-r--r-- | fs/cifs/connect.c | 2 |
2 files changed, 16 insertions, 1 deletions
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index b296964b8afa6c..b565d83ba89ed9 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -2031,4 +2031,19 @@ static inline bool is_smb1_server(struct TCP_Server_Info *server) return strcmp(server->vals->version_string, SMB1_VERSION_STRING) == 0; } +static inline bool is_tcon_dfs(struct cifs_tcon *tcon) +{ + /* + * For SMB1, see MS-CIFS 2.4.55 SMB_COM_TREE_CONNECT_ANDX (0x75) and MS-CIFS 3.3.4.4 DFS + * Subsystem Notifies That a Share Is a DFS Share. + * + * For SMB2+, see MS-SMB2 2.2.10 SMB2 TREE_CONNECT Response and MS-SMB2 3.3.4.14 Server + * Application Updates a Share. + */ + if (!tcon || !tcon->ses || !tcon->ses->server) + return false; + return is_smb1_server(tcon->ses->server) ? tcon->Flags & SMB_SHARE_IS_IN_DFS : + tcon->share_flags & (SHI1005_FLAGS_DFS | SHI1005_FLAGS_DFS_ROOT); +} + #endif /* _CIFS_GLOB_H */ diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c index 51c6b7880a7083..a5731dd6e6566e 100644 --- a/fs/cifs/connect.c +++ b/fs/cifs/connect.c @@ -4909,7 +4909,7 @@ int cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *vol) if (!tcon) continue; /* Make sure that requests go through new root servers */ - if (tcon->share_flags & (SHI1005_FLAGS_DFS | SHI1005_FLAGS_DFS_ROOT)) { + if (is_tcon_dfs(tcon)) { put_root_ses(root_ses); set_root_ses(cifs_sb, ses, &root_ses); } |