184c18471f
I also log basic information that I can figure out about the type of state (such as number of locks for each client IP address). This can be useful for checking that state was actually dropped and later for checking if the client was able to recover. Signed-off-by: Bryan Schumaker <bjschuma@netapp.com> Signed-off-by: J. Bruce Fields <bfields@redhat.com>
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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