105 lines
2.3 KiB
C
105 lines
2.3 KiB
C
/*
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* Copyright (c) 2011 Bryan Schumaker <bjschuma@netapp.com>
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*
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* Uses debugfs to create fault injection points for client testing
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*/
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#include <linux/types.h>
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#include <linux/fs.h>
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#include <linux/debugfs.h>
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#include <linux/module.h>
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#include "state.h"
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struct nfsd_fault_inject_op {
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char *file;
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u64 (*forget)(struct nfs4_client *, u64);
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u64 (*print)(struct nfs4_client *, u64);
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};
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static struct nfsd_fault_inject_op inject_ops[] = {
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{
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.file = "forget_clients",
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.forget = nfsd_forget_client,
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.print = nfsd_print_client,
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},
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{
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.file = "forget_locks",
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.forget = nfsd_forget_client_locks,
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.print = nfsd_print_client_locks,
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},
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{
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.file = "forget_openowners",
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.forget = nfsd_forget_client_openowners,
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.print = nfsd_print_client_openowners,
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},
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{
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.file = "forget_delegations",
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.forget = nfsd_forget_client_delegations,
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.print = nfsd_print_client_delegations,
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},
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{
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.file = "recall_delegations",
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.forget = nfsd_recall_client_delegations,
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.print = nfsd_print_client_delegations,
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},
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};
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static long int NUM_INJECT_OPS = sizeof(inject_ops) / sizeof(struct nfsd_fault_inject_op);
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static struct dentry *debug_dir;
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static int nfsd_inject_set(void *op_ptr, u64 val)
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{
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u64 count = 0;
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struct nfsd_fault_inject_op *op = op_ptr;
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if (val == 0)
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printk(KERN_INFO "NFSD Fault Injection: %s (all)", op->file);
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else
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printk(KERN_INFO "NFSD Fault Injection: %s (n = %llu)", op->file, val);
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nfs4_lock_state();
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count = nfsd_for_n_state(val, op->forget);
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nfs4_unlock_state();
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printk(KERN_INFO "NFSD: %s: found %llu", op->file, count);
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return 0;
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}
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static int nfsd_inject_get(void *op_ptr, u64 *val)
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{
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struct nfsd_fault_inject_op *op = op_ptr;
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nfs4_lock_state();
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*val = nfsd_for_n_state(0, op->print);
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nfs4_unlock_state();
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return 0;
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}
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DEFINE_SIMPLE_ATTRIBUTE(fops_nfsd, nfsd_inject_get, nfsd_inject_set, "%llu\n");
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void nfsd_fault_inject_cleanup(void)
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{
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debugfs_remove_recursive(debug_dir);
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}
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int nfsd_fault_inject_init(void)
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{
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unsigned int i;
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struct nfsd_fault_inject_op *op;
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umode_t mode = S_IFREG | S_IRUSR | S_IWUSR;
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debug_dir = debugfs_create_dir("nfsd", NULL);
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if (!debug_dir)
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goto fail;
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for (i = 0; i < NUM_INJECT_OPS; i++) {
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op = &inject_ops[i];
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if (!debugfs_create_file(op->file, mode, debug_dir, op, &fops_nfsd))
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goto fail;
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}
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return 0;
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fail:
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nfsd_fault_inject_cleanup();
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return -ENOMEM;
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}
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