diff options
Diffstat (limited to 'net/sunrpc/sysctl.c')
| -rw-r--r-- | net/sunrpc/sysctl.c | 193 |
1 files changed, 193 insertions, 0 deletions
diff --git a/net/sunrpc/sysctl.c b/net/sunrpc/sysctl.c new file mode 100644 index 000000000000..1b9616a12e24 --- /dev/null +++ b/net/sunrpc/sysctl.c @@ -0,0 +1,193 @@ +/* + * linux/net/sunrpc/sysctl.c + * + * Sysctl interface to sunrpc module. + * + * I would prefer to register the sunrpc table below sys/net, but that's + * impossible at the moment. + */ + +#include <linux/config.h> +#include <linux/types.h> +#include <linux/linkage.h> +#include <linux/ctype.h> +#include <linux/fs.h> +#include <linux/sysctl.h> +#include <linux/module.h> + +#include <asm/uaccess.h> +#include <linux/sunrpc/types.h> +#include <linux/sunrpc/sched.h> +#include <linux/sunrpc/stats.h> +#include <linux/sunrpc/xprt.h> + +/* + * Declare the debug flags here + */ +unsigned int rpc_debug; +unsigned int nfs_debug; +unsigned int nfsd_debug; +unsigned int nlm_debug; + +#ifdef RPC_DEBUG + +static struct ctl_table_header *sunrpc_table_header; +static ctl_table sunrpc_table[]; + +void +rpc_register_sysctl(void) +{ + if (!sunrpc_table_header) { + sunrpc_table_header = register_sysctl_table(sunrpc_table, 1); +#ifdef CONFIG_PROC_FS + if (sunrpc_table[0].de) + sunrpc_table[0].de->owner = THIS_MODULE; +#endif + } + +} + +void +rpc_unregister_sysctl(void) +{ + if (sunrpc_table_header) { + unregister_sysctl_table(sunrpc_table_header); + sunrpc_table_header = NULL; + } +} + +static int +proc_dodebug(ctl_table *table, int write, struct file *file, + void __user *buffer, size_t *lenp, loff_t *ppos) +{ + char tmpbuf[20], c, *s; + char __user *p; + unsigned int value; + size_t left, len; + + if ((*ppos && !write) || !*lenp) { + *lenp = 0; + return 0; + } + + left = *lenp; + + if (write) { + if (!access_ok(VERIFY_READ, buffer, left)) + return -EFAULT; + p = buffer; + while (left && __get_user(c, p) >= 0 && isspace(c)) + left--, p++; + if (!left) + goto done; + + if (left > sizeof(tmpbuf) - 1) + return -EINVAL; + if (copy_from_user(tmpbuf, p, left)) + return -EFAULT; + tmpbuf[left] = '\0'; + + for (s = tmpbuf, value = 0; '0' <= *s && *s <= '9'; s++, left--) + value = 10 * value + (*s - '0'); + if (*s && !isspace(*s)) + return -EINVAL; + while (left && isspace(*s)) + left--, s++; + *(unsigned int *) table->data = value; + /* Display the RPC tasks on writing to rpc_debug */ + if (table->ctl_name == CTL_RPCDEBUG) { + rpc_show_tasks(); + } + } else { + if (!access_ok(VERIFY_WRITE, buffer, left)) + return -EFAULT; + len = sprintf(tmpbuf, "%d", *(unsigned int *) table->data); + if (len > left) + len = left; + if (__copy_to_user(buffer, tmpbuf, len)) + return -EFAULT; + if ((left -= len) > 0) { + if (put_user('\n', (char __user *)buffer + len)) + return -EFAULT; + left--; + } + } + +done: + *lenp -= left; + *ppos += *lenp; + return 0; +} + +static unsigned int min_slot_table_size = RPC_MIN_SLOT_TABLE; +static unsigned int max_slot_table_size = RPC_MAX_SLOT_TABLE; + +static ctl_table debug_table[] = { + { + .ctl_name = CTL_RPCDEBUG, + .procname = "rpc_debug", + .data = &rpc_debug, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = &proc_dodebug + }, + { + .ctl_name = CTL_NFSDEBUG, + .procname = "nfs_debug", + .data = &nfs_debug, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = &proc_dodebug + }, + { + .ctl_name = CTL_NFSDDEBUG, + .procname = "nfsd_debug", + .data = &nfsd_debug, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = &proc_dodebug + }, + { + .ctl_name = CTL_NLMDEBUG, + .procname = "nlm_debug", + .data = &nlm_debug, + .maxlen = sizeof(int), + .mode = 0644, + .proc_handler = &proc_dodebug + }, + { + .ctl_name = CTL_SLOTTABLE_UDP, + .procname = "udp_slot_table_entries", + .data = &xprt_udp_slot_table_entries, + .maxlen = sizeof(unsigned int), + .mode = 0644, + .proc_handler = &proc_dointvec_minmax, + .strategy = &sysctl_intvec, + .extra1 = &min_slot_table_size, + .extra2 = &max_slot_table_size + }, + { + .ctl_name = CTL_SLOTTABLE_TCP, + .procname = "tcp_slot_table_entries", + .data = &xprt_tcp_slot_table_entries, + .maxlen = sizeof(unsigned int), + .mode = 0644, + .proc_handler = &proc_dointvec_minmax, + .strategy = &sysctl_intvec, + .extra1 = &min_slot_table_size, + .extra2 = &max_slot_table_size + }, + { .ctl_name = 0 } +}; + +static ctl_table sunrpc_table[] = { + { + .ctl_name = CTL_SUNRPC, + .procname = "sunrpc", + .mode = 0555, + .child = debug_table + }, + { .ctl_name = 0 } +}; + +#endif |