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cifs: Make devname param optional in cifs_compose_mount_options()

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If we only want to get the mount options strings, do not return the
devname.

For DFS failover, we'll be passing the DFS full path down to
cifs_mount() rather than the devname.

Signed-off-by: Paulo Alcantara <palcantara@suse.de>
Reviewed-by: Aurelien Aptel <aaptel@suse.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Paulo Alcantara 2018-11-14 14:18:22 -02:00 committed by Steve French
parent c34fea5a63
commit d9345e0ae7
1 changed files with 12 additions and 9 deletions
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21
fs/cifs/cifs_dfs_ref.c
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@ -126,7 +126,7 @@ cifs_build_devname(char *nodename, const char *prepath)
* @sb_mountdata: parent/root DFS mount options (template)
* @fullpath: full path in UNC format
* @ref: server's referral
* @devname: pointer for saving device name
* @devname: optional pointer for saving device name
*
* creates mount options for submount based on template options sb_mountdata
* and replacing unc,ip,prefixpath options with ones we've got form ref_unc.
@ -140,6 +140,7 @@ char *cifs_compose_mount_options(const char *sb_mountdata,
char **devname)
{
int rc;
char *name;
char *mountdata = NULL;
const char *prepath = NULL;
int md_len;
@ -158,17 +159,17 @@ char *cifs_compose_mount_options(const char *sb_mountdata,
prepath++;
}
*devname = cifs_build_devname(ref->node_name, prepath);
if (IS_ERR(*devname)) {
rc = PTR_ERR(*devname);
*devname = NULL;
name = cifs_build_devname(ref->node_name, prepath);
if (IS_ERR(name)) {
rc = PTR_ERR(name);
name = NULL;
goto compose_mount_options_err;
}
rc = dns_resolve_server_name_to_ip(*devname, &srvIP);
rc = dns_resolve_server_name_to_ip(name, &srvIP);
if (rc < 0) {
cifs_dbg(FYI, "%s: Failed to resolve server part of %s to IP: %d\n",
__func__, *devname, rc);
__func__, name, rc);
goto compose_mount_options_err;
}
@ -224,6 +225,9 @@ char *cifs_compose_mount_options(const char *sb_mountdata,
strcat(mountdata, "ip=");
strcat(mountdata, srvIP);
if (devname)
*devname = name;
/*cifs_dbg(FYI, "%s: parent mountdata: %s\n", __func__, sb_mountdata);*/
/*cifs_dbg(FYI, "%s: submount mountdata: %s\n", __func__, mountdata );*/
@ -234,8 +238,7 @@ char *cifs_compose_mount_options(const char *sb_mountdata,
compose_mount_options_err:
kfree(mountdata);
mountdata = ERR_PTR(rc);
kfree(*devname);
*devname = NULL;
kfree(name);
goto compose_mount_options_out;
}