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SUNRPC: add links for all client xprts to debugfs

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Now that a client can have multiple xprts, we need to add
them all to debugs.
The first one is still "xprt"
Subsequent xprts are "xprt1", "xprt2", etc.

Signed-off-by: NeilBrown <neilb@suse.com>
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
This commit is contained in:
NeilBrown 2019-05-30 10:41:28 +10:00 committed by Trond Myklebust
parent 10db56917b
commit 2f34b8bfae
1 changed files with 29 additions and 17 deletions
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46
net/sunrpc/debugfs.c
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@ -118,12 +118,38 @@ static const struct file_operations tasks_fops = {
.release = tasks_release,
};
static int do_xprt_debugfs(struct rpc_clnt *clnt, struct rpc_xprt *xprt, void *numv)
{
int len;
char name[24]; /* enough for "../../rpc_xprt/ + 8 hex digits + NULL */
char link[9]; /* enough for 8 hex digits + NULL */
int *nump = numv;
if (IS_ERR_OR_NULL(xprt->debugfs))
return 0;
len = snprintf(name, sizeof(name), "../../rpc_xprt/%s",
xprt->debugfs->d_name.name);
if (len > sizeof(name))
return -1;
if (*nump == 0)
strcpy(link, "xprt");
else {
len = snprintf(link, sizeof(link), "xprt%d", *nump);
if (len > sizeof(link))
return -1;
}
if (!debugfs_create_symlink(link, clnt->cl_debugfs, name))
return -1;
(*nump)++;
return 0;
}
void
rpc_clnt_debugfs_register(struct rpc_clnt *clnt)
{
int len;
char name[24]; /* enough for "../../rpc_xprt/ + 8 hex digits + NULL */
struct rpc_xprt *xprt;
char name[9]; /* enough for 8 hex digits + NULL */
int xprtnum = 0;
/* Already registered? */
if (clnt->cl_debugfs || !rpc_clnt_dir)
@ -143,21 +169,7 @@ rpc_clnt_debugfs_register(struct rpc_clnt *clnt)
clnt, &tasks_fops))
goto out_err;
rcu_read_lock();
xprt = rcu_dereference(clnt->cl_xprt);
/* no "debugfs" dentry? Don't bother with the symlink. */
if (IS_ERR_OR_NULL(xprt->debugfs)) {
rcu_read_unlock();
return;
}
len = snprintf(name, sizeof(name), "../../rpc_xprt/%s",
xprt->debugfs->d_name.name);
rcu_read_unlock();
if (len >= sizeof(name))
goto out_err;
if (!debugfs_create_symlink("xprt", clnt->cl_debugfs, name))
if (rpc_clnt_iterate_for_each_xprt(clnt, do_xprt_debugfs, &xprtnum) < 0)
goto out_err;
return;