mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-25 02:09:42 +00:00
![Jeff Layton](/assets/img/avatar_default.png)
Remove the old nfsd_for_n_state function and move nfsd_find_client higher up into the file to get rid of forward declaration. Remove the struct nfsd_fault_inject_op arguments from the operations as they are no longer needed by any of them. Finally, remove the old "standard" get and set routines, which also eliminates the client_mutex from this code. Signed-off-by: Jeff Layton <jlayton@primarydata.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
150 lines
3.7 KiB
C
150 lines
3.7 KiB
C
/*
|
|
* Copyright (c) 2011 Bryan Schumaker <bjschuma@netapp.com>
|
|
*
|
|
* Uses debugfs to create fault injection points for client testing
|
|
*/
|
|
|
|
#include <linux/types.h>
|
|
#include <linux/fs.h>
|
|
#include <linux/debugfs.h>
|
|
#include <linux/module.h>
|
|
#include <linux/nsproxy.h>
|
|
#include <linux/sunrpc/addr.h>
|
|
#include <asm/uaccess.h>
|
|
|
|
#include "state.h"
|
|
#include "netns.h"
|
|
|
|
struct nfsd_fault_inject_op {
|
|
char *file;
|
|
u64 (*get)(void);
|
|
u64 (*set_val)(u64);
|
|
u64 (*set_clnt)(struct sockaddr_storage *, size_t);
|
|
};
|
|
|
|
static struct dentry *debug_dir;
|
|
|
|
static ssize_t fault_inject_read(struct file *file, char __user *buf,
|
|
size_t len, loff_t *ppos)
|
|
{
|
|
static u64 val;
|
|
char read_buf[25];
|
|
size_t size;
|
|
loff_t pos = *ppos;
|
|
struct nfsd_fault_inject_op *op = file_inode(file)->i_private;
|
|
|
|
if (!pos)
|
|
val = op->get();
|
|
size = scnprintf(read_buf, sizeof(read_buf), "%llu\n", val);
|
|
|
|
return simple_read_from_buffer(buf, len, ppos, read_buf, size);
|
|
}
|
|
|
|
static ssize_t fault_inject_write(struct file *file, const char __user *buf,
|
|
size_t len, loff_t *ppos)
|
|
{
|
|
char write_buf[INET6_ADDRSTRLEN];
|
|
size_t size = min(sizeof(write_buf) - 1, len);
|
|
struct net *net = current->nsproxy->net_ns;
|
|
struct sockaddr_storage sa;
|
|
struct nfsd_fault_inject_op *op = file_inode(file)->i_private;
|
|
u64 val;
|
|
char *nl;
|
|
|
|
if (copy_from_user(write_buf, buf, size))
|
|
return -EFAULT;
|
|
write_buf[size] = '\0';
|
|
|
|
/* Deal with any embedded newlines in the string */
|
|
nl = strchr(write_buf, '\n');
|
|
if (nl) {
|
|
size = nl - write_buf;
|
|
*nl = '\0';
|
|
}
|
|
|
|
size = rpc_pton(net, write_buf, size, (struct sockaddr *)&sa, sizeof(sa));
|
|
if (size > 0) {
|
|
val = op->set_clnt(&sa, size);
|
|
if (val)
|
|
pr_info("NFSD [%s]: Client %s had %llu state object(s)\n",
|
|
op->file, write_buf, val);
|
|
} else {
|
|
val = simple_strtoll(write_buf, NULL, 0);
|
|
if (val == 0)
|
|
pr_info("NFSD Fault Injection: %s (all)", op->file);
|
|
else
|
|
pr_info("NFSD Fault Injection: %s (n = %llu)",
|
|
op->file, val);
|
|
val = op->set_val(val);
|
|
pr_info("NFSD: %s: found %llu", op->file, val);
|
|
}
|
|
return len; /* on success, claim we got the whole input */
|
|
}
|
|
|
|
static const struct file_operations fops_nfsd = {
|
|
.owner = THIS_MODULE,
|
|
.read = fault_inject_read,
|
|
.write = fault_inject_write,
|
|
};
|
|
|
|
void nfsd_fault_inject_cleanup(void)
|
|
{
|
|
debugfs_remove_recursive(debug_dir);
|
|
}
|
|
|
|
static struct nfsd_fault_inject_op inject_ops[] = {
|
|
{
|
|
.file = "forget_clients",
|
|
.get = nfsd_inject_print_clients,
|
|
.set_val = nfsd_inject_forget_clients,
|
|
.set_clnt = nfsd_inject_forget_client,
|
|
},
|
|
{
|
|
.file = "forget_locks",
|
|
.get = nfsd_inject_print_locks,
|
|
.set_val = nfsd_inject_forget_locks,
|
|
.set_clnt = nfsd_inject_forget_client_locks,
|
|
},
|
|
{
|
|
.file = "forget_openowners",
|
|
.get = nfsd_inject_print_openowners,
|
|
.set_val = nfsd_inject_forget_openowners,
|
|
.set_clnt = nfsd_inject_forget_client_openowners,
|
|
},
|
|
{
|
|
.file = "forget_delegations",
|
|
.get = nfsd_inject_print_delegations,
|
|
.set_val = nfsd_inject_forget_delegations,
|
|
.set_clnt = nfsd_inject_forget_client_delegations,
|
|
},
|
|
{
|
|
.file = "recall_delegations",
|
|
.get = nfsd_inject_print_delegations,
|
|
.set_val = nfsd_inject_recall_delegations,
|
|
.set_clnt = nfsd_inject_recall_client_delegations,
|
|
},
|
|
};
|
|
|
|
#define NUM_INJECT_OPS (sizeof(inject_ops)/sizeof(struct nfsd_fault_inject_op))
|
|
|
|
int nfsd_fault_inject_init(void)
|
|
{
|
|
unsigned int i;
|
|
struct nfsd_fault_inject_op *op;
|
|
umode_t mode = S_IFREG | S_IRUSR | S_IWUSR;
|
|
|
|
debug_dir = debugfs_create_dir("nfsd", NULL);
|
|
if (!debug_dir)
|
|
goto fail;
|
|
|
|
for (i = 0; i < NUM_INJECT_OPS; i++) {
|
|
op = &inject_ops[i];
|
|
if (!debugfs_create_file(op->file, mode, debug_dir, op, &fops_nfsd))
|
|
goto fail;
|
|
}
|
|
return 0;
|
|
|
|
fail:
|
|
nfsd_fault_inject_cleanup();
|
|
return -ENOMEM;
|
|
}
|