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fs/9p/v9fs.c (v9fs_parse_options): Handle kstrdup and match_strdup failure. Now that this function can fail, return an int, diagnose other option-parsing failures, and adjust the sole caller: (v9fs_session_init): Handle kstrdup failure. Propagate any new v9fs_parse_options failure "up".

Browse source 
Signed-off-by: Jim Meyering <meyering@redhat.com>
Cc: Ron Minnich <rminnich@sandia.gov>
Cc: Latchesar Ionkov <lucho@ionkov.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Eric Van Hensbergen <ericvh@gmail.com>
This commit is contained in:
Jim Meyering 2008-03-06 17:10:28 -06:00 committed by Eric Van Hensbergen
parent ee443996a3
commit ab31267dfe
1 changed files with 34 additions and 6 deletions
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40
fs/9p/v9fs.c
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@ -73,16 +73,17 @@ static match_table_t tokens = {
* v9fs_parse_options - parse mount options into session structure
* @v9ses: existing v9fs session information
*
* Return 0 upon success, -ERRNO upon failure.
*/
static void v9fs_parse_options(struct v9fs_session_info *v9ses)
static int v9fs_parse_options(struct v9fs_session_info *v9ses)
{
char *options;
substring_t args[MAX_OPT_ARGS];
char *p;
int option = 0;
char *s, *e;
int ret;
int ret = 0;
/* setup defaults */
v9ses->afid = ~0;
@ -90,19 +91,26 @@ static void v9fs_parse_options(struct v9fs_session_info *v9ses)
v9ses->cache = 0;
if (!v9ses->options)
return;
return 0;
options = kstrdup(v9ses->options, GFP_KERNEL);
if (!options) {
P9_DPRINTK(P9_DEBUG_ERROR,
"failed to allocate copy of option string\n");
return -ENOMEM;
}
while ((p = strsep(&options, ",")) != NULL) {
int token;
if (!*p)
continue;
token = match_token(p, tokens, args);
if (token < Opt_uname) {
ret = match_int(&args[0], &option);
if (ret < 0) {
int r = match_int(&args[0], &option);
if (r < 0) {
P9_DPRINTK(P9_DEBUG_ERROR,
"integer field, but no integer?\n");
ret = r;
continue;
}
}
@ -138,6 +146,13 @@ static void v9fs_parse_options(struct v9fs_session_info *v9ses)
case Opt_access:
s = match_strdup(&args[0]);
if (!s) {
P9_DPRINTK(P9_DEBUG_ERROR,
"failed to allocate copy"
" of option argument\n");
ret = -ENOMEM;
break;
}
v9ses->flags &= ~V9FS_ACCESS_MASK;
if (strcmp(s, "user") == 0)
v9ses->flags |= V9FS_ACCESS_USER;
@ -157,6 +172,7 @@ static void v9fs_parse_options(struct v9fs_session_info *v9ses)
}
}
kfree(options);
return ret;
}
/**
@ -172,6 +188,7 @@ struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses,
{
int retval = -EINVAL;
struct p9_fid *fid;
int rc;
v9ses->uname = __getname();
if (!v9ses->uname)
@ -190,7 +207,18 @@ struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses,
v9ses->dfltuid = V9FS_DEFUID;
v9ses->dfltgid = V9FS_DEFGID;
v9ses->options = kstrdup(data, GFP_KERNEL);
v9fs_parse_options(v9ses);
if (!v9ses->options) {
P9_DPRINTK(P9_DEBUG_ERROR,
"failed to allocate copy of option string\n");
retval = -ENOMEM;
goto error;
}
rc = v9fs_parse_options(v9ses);
if (rc < 0) {
retval = rc;
goto error;
}
v9ses->clnt = p9_client_create(dev_name, v9ses->options);