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cleanup: save 60 lines/100 bytes by combining two mostly duplicate functions.

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Eliminate two mostly duplicate functions (nfs_parse_simple_hostname()
and nfs_parse_protected_hostname()) and instead just make the calling
function (nfs_parse_devname()) do everything.

Signed-off-by: Rob Landley <rlandley@parallels.com>
Signed-off-by: Trond Myklebust <Trond.Myklebust@netapp.com>
This commit is contained in:
Rob Landley 2011-03-09 15:54:13 -06:00 committed by Trond Myklebust
parent 7ec10f26e1
commit c12bacec45
1 changed files with 37 additions and 100 deletions
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137
fs/nfs/super.c
View File

@ -1665,39 +1665,55 @@ static int nfs_try_mount(struct nfs_parsed_mount_data *args,
return nfs_walk_authlist(args, &request);
}
static int nfs_parse_simple_hostname(const char *dev_name,
char **hostname, size_t maxnamlen,
char **export_path, size_t maxpathlen)
/*
* Split "dev_name" into "hostname:export_path".
*
* The leftmost colon demarks the split between the server's hostname
* and the export path. If the hostname starts with a left square
* bracket, then it may contain colons.
*
* Note: caller frees hostname and export path, even on error.
*/
static int nfs_parse_devname(const char *dev_name,
char **hostname, size_t maxnamlen,
char **export_path, size_t maxpathlen)
{
size_t len;
char *colon, *comma;
char *end;
colon = strchr(dev_name, ':');
if (colon == NULL)
goto out_bad_devname;
/* Is the host name protected with square brakcets? */
if (*dev_name == '[') {
end = strchr(++dev_name, ']');
if (end == NULL || end[1] != ':')
goto out_bad_devname;
len = end - dev_name;
end++;
} else {
char *comma;
end = strchr(dev_name, ':');
if (end == NULL)
goto out_bad_devname;
len = end - dev_name;
/* kill possible hostname list: not supported */
comma = strchr(dev_name, ',');
if (comma != NULL && comma < end)
*comma = 0;
}
len = colon - dev_name;
if (len > maxnamlen)
goto out_hostname;
/* N.B. caller will free nfs_server.hostname in all cases */
*hostname = kstrndup(dev_name, len, GFP_KERNEL);
if (!*hostname)
if (*hostname == NULL)
goto out_nomem;
/* kill possible hostname list: not supported */
comma = strchr(*hostname, ',');
if (comma != NULL) {
if (comma == *hostname)
goto out_bad_devname;
*comma = '\0';
}
colon++;
len = strlen(colon);
len = strlen(++end);
if (len > maxpathlen)
goto out_path;
*export_path = kstrndup(colon, len, GFP_KERNEL);
*export_path = kstrndup(end, len, GFP_KERNEL);
if (!*export_path)
goto out_nomem;
@ -1721,85 +1737,6 @@ out_path:
return -ENAMETOOLONG;
}
/*
* Hostname has square brackets around it because it contains one or
* more colons. We look for the first closing square bracket, and a
* colon must follow it.
*/
static int nfs_parse_protected_hostname(const char *dev_name,
char **hostname, size_t maxnamlen,
char **export_path, size_t maxpathlen)
{
size_t len;
char *start, *end;
start = (char *)(dev_name + 1);
end = strchr(start, ']');
if (end == NULL)
goto out_bad_devname;
if (*(end + 1) != ':')
goto out_bad_devname;
len = end - start;
if (len > maxnamlen)
goto out_hostname;
/* N.B. caller will free nfs_server.hostname in all cases */
*hostname = kstrndup(start, len, GFP_KERNEL);
if (*hostname == NULL)
goto out_nomem;
end += 2;
len = strlen(end);
if (len > maxpathlen)
goto out_path;
*export_path = kstrndup(end, len, GFP_KERNEL);
if (!*export_path)
goto out_nomem;
return 0;
out_bad_devname:
dfprintk(MOUNT, "NFS: device name not in host:path format\n");
return -EINVAL;
out_nomem:
dfprintk(MOUNT, "NFS: not enough memory to parse device name\n");
return -ENOMEM;
out_hostname:
dfprintk(MOUNT, "NFS: server hostname too long\n");
return -ENAMETOOLONG;
out_path:
dfprintk(MOUNT, "NFS: export pathname too long\n");
return -ENAMETOOLONG;
}
/*
* Split "dev_name" into "hostname:export_path".
*
* The leftmost colon demarks the split between the server's hostname
* and the export path. If the hostname starts with a left square
* bracket, then it may contain colons.
*
* Note: caller frees hostname and export path, even on error.
*/
static int nfs_parse_devname(const char *dev_name,
char **hostname, size_t maxnamlen,
char **export_path, size_t maxpathlen)
{
if (*dev_name == '[')
return nfs_parse_protected_hostname(dev_name,
hostname, maxnamlen,
export_path, maxpathlen);
return nfs_parse_simple_hostname(dev_name,
hostname, maxnamlen,
export_path, maxpathlen);
}
/*
* Validate the NFS2/NFS3 mount data
* - fills in the mount root filehandle