diff options
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/hvc/hvc_iucv.c | 31 | ||||
| -rw-r--r-- | drivers/tty/sysrq.c | 23 |
2 files changed, 36 insertions, 18 deletions
diff --git a/drivers/tty/hvc/hvc_iucv.c b/drivers/tty/hvc/hvc_iucv.c index ea74460f3638..f78a87b07872 100644 --- a/drivers/tty/hvc/hvc_iucv.c +++ b/drivers/tty/hvc/hvc_iucv.c @@ -1,10 +1,10 @@ /* - * hvc_iucv.c - z/VM IUCV hypervisor console (HVC) device driver + * z/VM IUCV hypervisor console (HVC) device driver * * This HVC device driver provides terminal access using * z/VM IUCV communication paths. * - * Copyright IBM Corp. 2008, 2009 + * Copyright IBM Corp. 2008, 2013 * * Author(s): Hendrik Brueckner <brueckner@linux.vnet.ibm.com> */ @@ -102,6 +102,7 @@ static struct hvc_iucv_private *hvc_iucv_table[MAX_HVC_IUCV_LINES]; #define IUCV_HVC_CON_IDX (0) /* List of z/VM user ID filter entries (struct iucv_vmid_filter) */ #define MAX_VMID_FILTER (500) +#define FILTER_WILDCARD_CHAR '*' static size_t hvc_iucv_filter_size; static void *hvc_iucv_filter; static const char *hvc_iucv_filter_string; @@ -734,20 +735,31 @@ static void hvc_iucv_notifier_del(struct hvc_struct *hp, int id) * hvc_iucv_filter_connreq() - Filter connection request based on z/VM user ID * @ipvmid: Originating z/VM user ID (right padded with blanks) * - * Returns 0 if the z/VM user ID @ipvmid is allowed to connection, otherwise - * non-zero. + * Returns 0 if the z/VM user ID that is specified with @ipvmid is permitted to + * connect, otherwise non-zero. */ static int hvc_iucv_filter_connreq(u8 ipvmid[8]) { - size_t i; + const char *wildcard, *filter_entry; + size_t i, len; /* Note: default policy is ACCEPT if no filter is set */ if (!hvc_iucv_filter_size) return 0; - for (i = 0; i < hvc_iucv_filter_size; i++) - if (0 == memcmp(ipvmid, hvc_iucv_filter + (8 * i), 8)) + for (i = 0; i < hvc_iucv_filter_size; i++) { + filter_entry = hvc_iucv_filter + (8 * i); + + /* If a filter entry contains the filter wildcard character, + * reduce the length to match the leading portion of the user + * ID only (wildcard match). Characters following the wildcard + * are ignored. + */ + wildcard = strnchr(filter_entry, 8, FILTER_WILDCARD_CHAR); + len = (wildcard) ? wildcard - filter_entry : 8; + if (0 == memcmp(ipvmid, filter_entry, len)) return 0; + } return 1; } @@ -1166,6 +1178,7 @@ static void __init hvc_iucv_destroy(struct hvc_iucv_private *priv) /** * hvc_iucv_parse_filter() - Parse filter for a single z/VM user ID * @filter: String containing a comma-separated list of z/VM user IDs + * @dest: Location where to store the parsed z/VM user ID */ static const char *hvc_iucv_parse_filter(const char *filter, char *dest) { @@ -1188,6 +1201,10 @@ static const char *hvc_iucv_parse_filter(const char *filter, char *dest) if (filter[len - 1] == '\n') len--; + /* prohibit filter entries containing the wildcard character only */ + if (len == 1 && *filter == FILTER_WILDCARD_CHAR) + return ERR_PTR(-EINVAL); + if (len > 8) return ERR_PTR(-EINVAL); diff --git a/drivers/tty/sysrq.c b/drivers/tty/sysrq.c index 42bad18c66c9..259a4d5a4e8f 100644 --- a/drivers/tty/sysrq.c +++ b/drivers/tty/sysrq.c @@ -90,7 +90,7 @@ static void sysrq_handle_loglevel(int key) i = key - '0'; console_loglevel = CONSOLE_LOGLEVEL_DEFAULT; - printk("Loglevel set to %d\n", i); + pr_info("Loglevel set to %d\n", i); console_loglevel = i; } static struct sysrq_key_op sysrq_loglevel_op = { @@ -220,7 +220,7 @@ static void showacpu(void *dummy) return; spin_lock_irqsave(&show_lock, flags); - printk(KERN_INFO "CPU%d:\n", smp_processor_id()); + pr_info("CPU%d:\n", smp_processor_id()); show_stack(NULL, NULL); spin_unlock_irqrestore(&show_lock, flags); } @@ -243,7 +243,7 @@ static void sysrq_handle_showallcpus(int key) struct pt_regs *regs = get_irq_regs(); if (regs) { - printk(KERN_INFO "CPU%d:\n", smp_processor_id()); + pr_info("CPU%d:\n", smp_processor_id()); show_regs(regs); } schedule_work(&sysrq_showallcpus); @@ -355,8 +355,9 @@ static struct sysrq_key_op sysrq_term_op = { static void moom_callback(struct work_struct *ignored) { - out_of_memory(node_zonelist(first_memory_node, GFP_KERNEL), GFP_KERNEL, - 0, NULL, true); + if (!out_of_memory(node_zonelist(first_memory_node, GFP_KERNEL), + GFP_KERNEL, 0, NULL, true)) + pr_info("OOM request ignored because killer is disabled\n"); } static DECLARE_WORK(moom_work, moom_callback); @@ -522,7 +523,7 @@ void __handle_sysrq(int key, bool check_mask) */ orig_log_level = console_loglevel; console_loglevel = CONSOLE_LOGLEVEL_DEFAULT; - printk(KERN_INFO "SysRq : "); + pr_info("SysRq : "); op_p = __sysrq_get_key_op(key); if (op_p) { @@ -531,14 +532,14 @@ void __handle_sysrq(int key, bool check_mask) * should not) and is the invoked operation enabled? */ if (!check_mask || sysrq_on_mask(op_p->enable_mask)) { - printk("%s\n", op_p->action_msg); + pr_cont("%s\n", op_p->action_msg); console_loglevel = orig_log_level; op_p->handler(key); } else { - printk("This sysrq operation is disabled.\n"); + pr_cont("This sysrq operation is disabled.\n"); } } else { - printk("HELP : "); + pr_cont("HELP : "); /* Only print the help msg once per handler */ for (i = 0; i < ARRAY_SIZE(sysrq_key_table); i++) { if (sysrq_key_table[i]) { @@ -549,10 +550,10 @@ void __handle_sysrq(int key, bool check_mask) ; if (j != i) continue; - printk("%s ", sysrq_key_table[i]->help_msg); + pr_cont("%s ", sysrq_key_table[i]->help_msg); } } - printk("\n"); + pr_cont("\n"); console_loglevel = orig_log_level; } rcu_read_unlock(); |