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Diffstat (limited to 'fs/nfsd/fault_inject.c')
-rw-r--r--fs/nfsd/fault_inject.c138
1 files changed, 62 insertions, 76 deletions
diff --git a/fs/nfsd/fault_inject.c b/fs/nfsd/fault_inject.c
index 2ed05c3cd43d..c16bf5af6831 100644
--- a/fs/nfsd/fault_inject.c
+++ b/fs/nfsd/fault_inject.c
@@ -17,81 +17,13 @@
17 17
18struct nfsd_fault_inject_op { 18struct nfsd_fault_inject_op {
19 char *file; 19 char *file;
20 u64 (*forget)(struct nfs4_client *, u64); 20 u64 (*get)(void);
21 u64 (*print)(struct nfs4_client *, u64); 21 u64 (*set_val)(u64);
22 u64 (*set_clnt)(struct sockaddr_storage *, size_t);
22}; 23};
23 24
24static struct nfsd_fault_inject_op inject_ops[] = {
25 {
26 .file = "forget_clients",
27 .forget = nfsd_forget_client,
28 .print = nfsd_print_client,
29 },
30 {
31 .file = "forget_locks",
32 .forget = nfsd_forget_client_locks,
33 .print = nfsd_print_client_locks,
34 },
35 {
36 .file = "forget_openowners",
37 .forget = nfsd_forget_client_openowners,
38 .print = nfsd_print_client_openowners,
39 },
40 {
41 .file = "forget_delegations",
42 .forget = nfsd_forget_client_delegations,
43 .print = nfsd_print_client_delegations,
44 },
45 {
46 .file = "recall_delegations",
47 .forget = nfsd_recall_client_delegations,
48 .print = nfsd_print_client_delegations,
49 },
50};
51
52static long int NUM_INJECT_OPS = sizeof(inject_ops) / sizeof(struct nfsd_fault_inject_op);
53static struct dentry *debug_dir; 25static struct dentry *debug_dir;
54 26
55static void nfsd_inject_set(struct nfsd_fault_inject_op *op, u64 val)
56{
57 u64 count = 0;
58
59 if (val == 0)
60 printk(KERN_INFO "NFSD Fault Injection: %s (all)", op->file);
61 else
62 printk(KERN_INFO "NFSD Fault Injection: %s (n = %llu)", op->file, val);
63
64 nfs4_lock_state();
65 count = nfsd_for_n_state(val, op->forget);
66 nfs4_unlock_state();
67 printk(KERN_INFO "NFSD: %s: found %llu", op->file, count);
68}
69
70static void nfsd_inject_set_client(struct nfsd_fault_inject_op *op,
71 struct sockaddr_storage *addr,
72 size_t addr_size)
73{
74 char buf[INET6_ADDRSTRLEN];
75 struct nfs4_client *clp;
76 u64 count;
77
78 nfs4_lock_state();
79 clp = nfsd_find_client(addr, addr_size);
80 if (clp) {
81 count = op->forget(clp, 0);
82 rpc_ntop((struct sockaddr *)&clp->cl_addr, buf, sizeof(buf));
83 printk(KERN_INFO "NFSD [%s]: Client %s had %llu state object(s)\n", op->file, buf, count);
84 }
85 nfs4_unlock_state();
86}
87
88static void nfsd_inject_get(struct nfsd_fault_inject_op *op, u64 *val)
89{
90 nfs4_lock_state();
91 *val = nfsd_for_n_state(0, op->print);
92 nfs4_unlock_state();
93}
94
95static ssize_t fault_inject_read(struct file *file, char __user *buf, 27static ssize_t fault_inject_read(struct file *file, char __user *buf,
96 size_t len, loff_t *ppos) 28 size_t len, loff_t *ppos)
97{ 29{
@@ -99,9 +31,10 @@ static ssize_t fault_inject_read(struct file *file, char __user *buf,
99 char read_buf[25]; 31 char read_buf[25];
100 size_t size; 32 size_t size;
101 loff_t pos = *ppos; 33 loff_t pos = *ppos;
34 struct nfsd_fault_inject_op *op = file_inode(file)->i_private;
102 35
103 if (!pos) 36 if (!pos)
104 nfsd_inject_get(file_inode(file)->i_private, &val); 37 val = op->get();
105 size = scnprintf(read_buf, sizeof(read_buf), "%llu\n", val); 38 size = scnprintf(read_buf, sizeof(read_buf), "%llu\n", val);
106 39
107 return simple_read_from_buffer(buf, len, ppos, read_buf, size); 40 return simple_read_from_buffer(buf, len, ppos, read_buf, size);
@@ -114,18 +47,36 @@ static ssize_t fault_inject_write(struct file *file, const char __user *buf,
114 size_t size = min(sizeof(write_buf) - 1, len); 47 size_t size = min(sizeof(write_buf) - 1, len);
115 struct net *net = current->nsproxy->net_ns; 48 struct net *net = current->nsproxy->net_ns;
116 struct sockaddr_storage sa; 49 struct sockaddr_storage sa;
50 struct nfsd_fault_inject_op *op = file_inode(file)->i_private;
117 u64 val; 51 u64 val;
52 char *nl;
118 53
119 if (copy_from_user(write_buf, buf, size)) 54 if (copy_from_user(write_buf, buf, size))
120 return -EFAULT; 55 return -EFAULT;
121 write_buf[size] = '\0'; 56 write_buf[size] = '\0';
122 57
58 /* Deal with any embedded newlines in the string */
59 nl = strchr(write_buf, '\n');
60 if (nl) {
61 size = nl - write_buf;
62 *nl = '\0';
63 }
64
123 size = rpc_pton(net, write_buf, size, (struct sockaddr *)&sa, sizeof(sa)); 65 size = rpc_pton(net, write_buf, size, (struct sockaddr *)&sa, sizeof(sa));
124 if (size > 0) 66 if (size > 0) {
125 nfsd_inject_set_client(file_inode(file)->i_private, &sa, size); 67 val = op->set_clnt(&sa, size);
126 else { 68 if (val)
69 pr_info("NFSD [%s]: Client %s had %llu state object(s)\n",
70 op->file, write_buf, val);
71 } else {
127 val = simple_strtoll(write_buf, NULL, 0); 72 val = simple_strtoll(write_buf, NULL, 0);
128 nfsd_inject_set(file_inode(file)->i_private, val); 73 if (val == 0)
74 pr_info("NFSD Fault Injection: %s (all)", op->file);
75 else
76 pr_info("NFSD Fault Injection: %s (n = %llu)",
77 op->file, val);
78 val = op->set_val(val);
79 pr_info("NFSD: %s: found %llu", op->file, val);
129 } 80 }
130 return len; /* on success, claim we got the whole input */ 81 return len; /* on success, claim we got the whole input */
131} 82}
@@ -141,6 +92,41 @@ void nfsd_fault_inject_cleanup(void)
141 debugfs_remove_recursive(debug_dir); 92 debugfs_remove_recursive(debug_dir);
142} 93}
143 94
95static struct nfsd_fault_inject_op inject_ops[] = {
96 {
97 .file = "forget_clients",
98 .get = nfsd_inject_print_clients,
99 .set_val = nfsd_inject_forget_clients,
100 .set_clnt = nfsd_inject_forget_client,
101 },
102 {
103 .file = "forget_locks",
104 .get = nfsd_inject_print_locks,
105 .set_val = nfsd_inject_forget_locks,
106 .set_clnt = nfsd_inject_forget_client_locks,
107 },
108 {
109 .file = "forget_openowners",
110 .get = nfsd_inject_print_openowners,
111 .set_val = nfsd_inject_forget_openowners,
112 .set_clnt = nfsd_inject_forget_client_openowners,
113 },
114 {
115 .file = "forget_delegations",
116 .get = nfsd_inject_print_delegations,
117 .set_val = nfsd_inject_forget_delegations,
118 .set_clnt = nfsd_inject_forget_client_delegations,
119 },
120 {
121 .file = "recall_delegations",
122 .get = nfsd_inject_print_delegations,
123 .set_val = nfsd_inject_recall_delegations,
124 .set_clnt = nfsd_inject_recall_client_delegations,
125 },
126};
127
128#define NUM_INJECT_OPS (sizeof(inject_ops)/sizeof(struct nfsd_fault_inject_op))
129
144int nfsd_fault_inject_init(void) 130int nfsd_fault_inject_init(void)
145{ 131{
146 unsigned int i; 132 unsigned int i;
generated by cgit v1.2.2 (git 2.25.0) at 2025-05-29 12:38:01 -0400