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-rw-r--r--lib/Kconfig3
-rw-r--r--lib/Kconfig.debug46
-rw-r--r--lib/Makefile2
-rw-r--r--lib/cpumask.c4
-rw-r--r--lib/debug_locks.c2
-rw-r--r--lib/debugobjects.c127
-rw-r--r--lib/decompress_bunzip2.c1
-rw-r--r--lib/decompress_inflate.c1
-rw-r--r--lib/decompress_unlzma.c1
-rw-r--r--lib/dma-debug.c53
-rw-r--r--lib/idr.c46
-rw-r--r--lib/kobject.c3
-rw-r--r--lib/kobject_uevent.c4
-rw-r--r--lib/locking-selftest.c4
-rw-r--r--lib/scatterlist.c9
-rw-r--r--lib/swiotlb.c2
-rw-r--r--lib/vsprintf.c993
17 files changed, 989 insertions, 312 deletions
diff --git a/lib/Kconfig b/lib/Kconfig
index 2a9c69f3448..8ade0a7a91e 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -2,6 +2,9 @@
# Library configuration
#
+config BINARY_PRINTF
+ def_bool n
+
menu "Library routines"
config BITREVERSE
diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
index 9638d99644a..812c28207ba 100644
--- a/lib/Kconfig.debug
+++ b/lib/Kconfig.debug
@@ -186,6 +186,44 @@ config BOOTPARAM_SOFTLOCKUP_PANIC_VALUE
default 0 if !BOOTPARAM_SOFTLOCKUP_PANIC
default 1 if BOOTPARAM_SOFTLOCKUP_PANIC
+config DETECT_HUNG_TASK
+ bool "Detect Hung Tasks"
+ depends on DEBUG_KERNEL
+ default DETECT_SOFTLOCKUP
+ help
+ Say Y here to enable the kernel to detect "hung tasks",
+ which are bugs that cause the task to be stuck in
+ uninterruptible "D" state indefinitiley.
+
+ When a hung task is detected, the kernel will print the
+ current stack trace (which you should report), but the
+ task will stay in uninterruptible state. If lockdep is
+ enabled then all held locks will also be reported. This
+ feature has negligible overhead.
+
+config BOOTPARAM_HUNG_TASK_PANIC
+ bool "Panic (Reboot) On Hung Tasks"
+ depends on DETECT_HUNG_TASK
+ help
+ Say Y here to enable the kernel to panic on "hung tasks",
+ which are bugs that cause the kernel to leave a task stuck
+ in uninterruptible "D" state.
+
+ The panic can be used in combination with panic_timeout,
+ to cause the system to reboot automatically after a
+ hung task has been detected. This feature is useful for
+ high-availability systems that have uptime guarantees and
+ where a hung tasks must be resolved ASAP.
+
+ Say N if unsure.
+
+config BOOTPARAM_HUNG_TASK_PANIC_VALUE
+ int
+ depends on DETECT_HUNG_TASK
+ range 0 1
+ default 0 if !BOOTPARAM_HUNG_TASK_PANIC
+ default 1 if BOOTPARAM_HUNG_TASK_PANIC
+
config SCHED_DEBUG
bool "Collect scheduler debugging info"
depends on DEBUG_KERNEL && PROC_FS
@@ -402,7 +440,7 @@ config LOCKDEP
bool
depends on DEBUG_KERNEL && TRACE_IRQFLAGS_SUPPORT && STACKTRACE_SUPPORT && LOCKDEP_SUPPORT
select STACKTRACE
- select FRAME_POINTER if !X86 && !MIPS && !PPC && !ARM_UNWIND
+ select FRAME_POINTER if !X86 && !MIPS && !PPC && !ARM_UNWIND && !S390
select KALLSYMS
select KALLSYMS_ALL
@@ -582,7 +620,7 @@ config ARCH_WANT_FRAME_POINTERS
config FRAME_POINTER
bool "Compile the kernel with frame pointers"
depends on DEBUG_KERNEL && \
- (CRIS || M68K || M68KNOMMU || FRV || UML || S390 || \
+ (CRIS || M68K || M68KNOMMU || FRV || UML || \
AVR32 || SUPERH || BLACKFIN || MN10300) || \
ARCH_WANT_FRAME_POINTERS
default y if (DEBUG_INFO && UML) || ARCH_WANT_FRAME_POINTERS
@@ -771,13 +809,13 @@ config FAULT_INJECTION_STACKTRACE_FILTER
depends on FAULT_INJECTION_DEBUG_FS && STACKTRACE_SUPPORT
depends on !X86_64
select STACKTRACE
- select FRAME_POINTER if !PPC
+ select FRAME_POINTER if !PPC && !S390
help
Provide stacktrace filter for fault-injection capabilities
config LATENCYTOP
bool "Latency measuring infrastructure"
- select FRAME_POINTER if !MIPS && !PPC
+ select FRAME_POINTER if !MIPS && !PPC && !S390
select KALLSYMS
select KALLSYMS_ALL
select STACKTRACE
diff --git a/lib/Makefile b/lib/Makefile
index d6edd6753f4..33a40e40e3e 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -38,7 +38,7 @@ lib-$(CONFIG_RWSEM_GENERIC_SPINLOCK) += rwsem-spinlock.o
lib-$(CONFIG_RWSEM_XCHGADD_ALGORITHM) += rwsem.o
lib-$(CONFIG_GENERIC_FIND_FIRST_BIT) += find_next_bit.o
lib-$(CONFIG_GENERIC_FIND_NEXT_BIT) += find_next_bit.o
-lib-$(CONFIG_GENERIC_FIND_LAST_BIT) += find_last_bit.o
+obj-$(CONFIG_GENERIC_FIND_LAST_BIT) += find_last_bit.o
obj-$(CONFIG_GENERIC_HWEIGHT) += hweight.o
obj-$(CONFIG_LOCK_KERNEL) += kernel_lock.o
obj-$(CONFIG_DEBUG_PREEMPT) += smp_processor_id.o
diff --git a/lib/cpumask.c b/lib/cpumask.c
index 3389e2440da..1f71b97de0f 100644
--- a/lib/cpumask.c
+++ b/lib/cpumask.c
@@ -109,10 +109,10 @@ bool alloc_cpumask_var_node(cpumask_var_t *mask, gfp_t flags, int node)
#endif
/* FIXME: Bandaid to save us from old primitives which go to NR_CPUS. */
if (*mask) {
+ unsigned char *ptr = (unsigned char *)cpumask_bits(*mask);
unsigned int tail;
tail = BITS_TO_LONGS(NR_CPUS - nr_cpumask_bits) * sizeof(long);
- memset(cpumask_bits(*mask) + cpumask_size() - tail,
- 0, tail);
+ memset(ptr + cpumask_size() - tail, 0, tail);
}
return *mask != NULL;
diff --git a/lib/debug_locks.c b/lib/debug_locks.c
index 0218b4693dd..bc3b11731b9 100644
--- a/lib/debug_locks.c
+++ b/lib/debug_locks.c
@@ -36,7 +36,7 @@ int debug_locks_silent;
*/
int debug_locks_off(void)
{
- if (xchg(&debug_locks, 0)) {
+ if (__debug_locks_off()) {
if (!debug_locks_silent) {
oops_in_progress = 1;
console_verbose();
diff --git a/lib/debugobjects.c b/lib/debugobjects.c
index 5d99be1fd98..2755a3bd16a 100644
--- a/lib/debugobjects.c
+++ b/lib/debugobjects.c
@@ -30,7 +30,7 @@ struct debug_bucket {
static struct debug_bucket obj_hash[ODEBUG_HASH_SIZE];
-static struct debug_obj obj_static_pool[ODEBUG_POOL_SIZE];
+static struct debug_obj obj_static_pool[ODEBUG_POOL_SIZE] __initdata;
static DEFINE_SPINLOCK(pool_lock);
@@ -50,12 +50,23 @@ static int debug_objects_enabled __read_mostly
static struct debug_obj_descr *descr_test __read_mostly;
+static void free_obj_work(struct work_struct *work);
+static DECLARE_WORK(debug_obj_work, free_obj_work);
+
static int __init enable_object_debug(char *str)
{
debug_objects_enabled = 1;
return 0;
}
+
+static int __init disable_object_debug(char *str)
+{
+ debug_objects_enabled = 0;
+ return 0;
+}
+
early_param("debug_objects", enable_object_debug);
+early_param("no_debug_objects", disable_object_debug);
static const char *obj_states[ODEBUG_STATE_MAX] = {
[ODEBUG_STATE_NONE] = "none",
@@ -146,25 +157,51 @@ alloc_object(void *addr, struct debug_bucket *b, struct debug_obj_descr *descr)
}
/*
- * Put the object back into the pool or give it back to kmem_cache:
+ * workqueue function to free objects.
*/
-static void free_object(struct debug_obj *obj)
+static void free_obj_work(struct work_struct *work)
{
- unsigned long idx = (unsigned long)(obj - obj_static_pool);
+ struct debug_obj *obj;
unsigned long flags;
- if (obj_pool_free < ODEBUG_POOL_SIZE || idx < ODEBUG_POOL_SIZE) {
- spin_lock_irqsave(&pool_lock, flags);
- hlist_add_head(&obj->node, &obj_pool);
- obj_pool_free++;
- obj_pool_used--;
- spin_unlock_irqrestore(&pool_lock, flags);
- } else {
- spin_lock_irqsave(&pool_lock, flags);
- obj_pool_used--;
+ spin_lock_irqsave(&pool_lock, flags);
+ while (obj_pool_free > ODEBUG_POOL_SIZE) {
+ obj = hlist_entry(obj_pool.first, typeof(*obj), node);
+ hlist_del(&obj->node);
+ obj_pool_free--;
+ /*
+ * We release pool_lock across kmem_cache_free() to
+ * avoid contention on pool_lock.
+ */
spin_unlock_irqrestore(&pool_lock, flags);
kmem_cache_free(obj_cache, obj);
+ spin_lock_irqsave(&pool_lock, flags);
}
+ spin_unlock_irqrestore(&pool_lock, flags);
+}
+
+/*
+ * Put the object back into the pool and schedule work to free objects
+ * if necessary.
+ */
+static void free_object(struct debug_obj *obj)
+{
+ unsigned long flags;
+ int sched = 0;
+
+ spin_lock_irqsave(&pool_lock, flags);
+ /*
+ * schedule work when the pool is filled and the cache is
+ * initialized:
+ */
+ if (obj_pool_free > ODEBUG_POOL_SIZE && obj_cache)
+ sched = !work_pending(&debug_obj_work);
+ hlist_add_head(&obj->node, &obj_pool);
+ obj_pool_free++;
+ obj_pool_used--;
+ spin_unlock_irqrestore(&pool_lock, flags);
+ if (sched)
+ schedule_work(&debug_obj_work);
}
/*
@@ -876,6 +913,63 @@ void __init debug_objects_early_init(void)
}
/*
+ * Convert the statically allocated objects to dynamic ones:
+ */
+static int debug_objects_replace_static_objects(void)
+{
+ struct debug_bucket *db = obj_hash;
+ struct hlist_node *node, *tmp;
+ struct debug_obj *obj, *new;
+ HLIST_HEAD(objects);
+ int i, cnt = 0;
+
+ for (i = 0; i < ODEBUG_POOL_SIZE; i++) {
+ obj = kmem_cache_zalloc(obj_cache, GFP_KERNEL);
+ if (!obj)
+ goto free;
+ hlist_add_head(&obj->node, &objects);
+ }
+
+ /*
+ * When debug_objects_mem_init() is called we know that only
+ * one CPU is up, so disabling interrupts is enough
+ * protection. This avoids the lockdep hell of lock ordering.
+ */
+ local_irq_disable();
+
+ /* Remove the statically allocated objects from the pool */
+ hlist_for_each_entry_safe(obj, node, tmp, &obj_pool, node)
+ hlist_del(&obj->node);
+ /* Move the allocated objects to the pool */
+ hlist_move_list(&objects, &obj_pool);
+
+ /* Replace the active object references */
+ for (i = 0; i < ODEBUG_HASH_SIZE; i++, db++) {
+ hlist_move_list(&db->list, &objects);
+
+ hlist_for_each_entry(obj, node, &objects, node) {
+ new = hlist_entry(obj_pool.first, typeof(*obj), node);
+ hlist_del(&new->node);
+ /* copy object data */
+ *new = *obj;
+ hlist_add_head(&new->node, &db->list);
+ cnt++;
+ }
+ }
+
+ printk(KERN_DEBUG "ODEBUG: %d of %d active objects replaced\n", cnt,
+ obj_pool_used);
+ local_irq_enable();
+ return 0;
+free:
+ hlist_for_each_entry_safe(obj, node, tmp, &objects, node) {
+ hlist_del(&obj->node);
+ kmem_cache_free(obj_cache, obj);
+ }
+ return -ENOMEM;
+}
+
+/*
* Called after the kmem_caches are functional to setup a dedicated
* cache pool, which has the SLAB_DEBUG_OBJECTS flag set. This flag
* prevents that the debug code is called on kmem_cache_free() for the
@@ -890,8 +984,11 @@ void __init debug_objects_mem_init(void)
sizeof (struct debug_obj), 0,
SLAB_DEBUG_OBJECTS, NULL);
- if (!obj_cache)
+ if (!obj_cache || debug_objects_replace_static_objects()) {
debug_objects_enabled = 0;
- else
+ if (obj_cache)
+ kmem_cache_destroy(obj_cache);
+ printk(KERN_WARNING "ODEBUG: out of memory.\n");
+ } else
debug_objects_selftest();
}
diff --git a/lib/decompress_bunzip2.c b/lib/decompress_bunzip2.c
index 5d3ddb5fcfd..708e2a86d87 100644
--- a/lib/decompress_bunzip2.c
+++ b/lib/decompress_bunzip2.c
@@ -50,6 +50,7 @@
#endif /* !STATIC */
#include <linux/decompress/mm.h>
+#include <linux/slab.h>
#ifndef INT_MAX
#define INT_MAX 0x7fffffff
diff --git a/lib/decompress_inflate.c b/lib/decompress_inflate.c
index 839a329b4fc..e36b296fc9f 100644
--- a/lib/decompress_inflate.c
+++ b/lib/decompress_inflate.c
@@ -23,6 +23,7 @@
#endif /* STATIC */
#include <linux/decompress/mm.h>
+#include <linux/slab.h>
#define INBUF_LEN (16*1024)
diff --git a/lib/decompress_unlzma.c b/lib/decompress_unlzma.c
index 546f2f4c157..32123a1340e 100644
--- a/lib/decompress_unlzma.c
+++ b/lib/decompress_unlzma.c
@@ -34,6 +34,7 @@
#endif /* STATIC */
#include <linux/decompress/mm.h>
+#include <linux/slab.h>
#define MIN(a, b) (((a) < (b)) ? (a) : (b))
diff --git a/lib/dma-debug.c b/lib/dma-debug.c
index d3da7edc034..69da09a085a 100644
--- a/lib/dma-debug.c
+++ b/lib/dma-debug.c
@@ -400,60 +400,9 @@ out_err:
return -ENOMEM;
}
-static int device_dma_allocations(struct device *dev)
-{
- struct dma_debug_entry *entry;
- unsigned long flags;
- int count = 0, i;
-
- for (i = 0; i < HASH_SIZE; ++i) {
- spin_lock_irqsave(&dma_entry_hash[i].lock, flags);
- list_for_each_entry(entry, &dma_entry_hash[i].list, list) {
- if (entry->dev == dev)
- count += 1;
- }
- spin_unlock_irqrestore(&dma_entry_hash[i].lock, flags);
- }
-
- return count;
-}
-
-static int dma_debug_device_change(struct notifier_block *nb,
- unsigned long action, void *data)
-{
- struct device *dev = data;
- int count;
-
-
- switch (action) {
- case BUS_NOTIFY_UNBIND_DRIVER:
- count = device_dma_allocations(dev);
- if (count == 0)
- break;
- err_printk(dev, NULL, "DMA-API: device driver has pending "
- "DMA allocations while released from device "
- "[count=%d]\n", count);
- break;
- default:
- break;
- }
-
- return 0;
-}
-
void dma_debug_add_bus(struct bus_type *bus)
{
- struct notifier_block *nb;
-
- nb = kzalloc(sizeof(struct notifier_block), GFP_KERNEL);
- if (nb == NULL) {
- printk(KERN_ERR "dma_debug_add_bus: out of memory\n");
- return;
- }
-
- nb->notifier_call = dma_debug_device_change;
-
- bus_register_notifier(bus, nb);
+ /* FIXME: register notifier */
}
/*
diff --git a/lib/idr.c b/lib/idr.c
index dab4bca86f5..80ca9aca038 100644
--- a/lib/idr.c
+++ b/lib/idr.c
@@ -579,6 +579,52 @@ int idr_for_each(struct idr *idp,
EXPORT_SYMBOL(idr_for_each);
/**
+ * idr_get_next - lookup next object of id to given id.
+ * @idp: idr handle
+ * @id: pointer to lookup key
+ *
+ * Returns pointer to registered object with id, which is next number to
+ * given id.
+ */
+
+void *idr_get_next(struct idr *idp, int *nextidp)
+{
+ struct idr_layer *p, *pa[MAX_LEVEL];
+ struct idr_layer **paa = &pa[0];
+ int id = *nextidp;
+ int n, max;
+
+ /* find first ent */
+ n = idp->layers * IDR_BITS;
+ max = 1 << n;
+ p = rcu_dereference(idp->top);
+ if (!p)
+ return NULL;
+
+ while (id < max) {
+ while (n > 0 && p) {
+ n -= IDR_BITS;
+ *paa++ = p;
+ p = rcu_dereference(p->ary[(id >> n) & IDR_MASK]);
+ }
+
+ if (p) {
+ *nextidp = id;
+ return p;
+ }
+
+ id += 1 << n;
+ while (n < fls(id)) {
+ n += IDR_BITS;
+ p = *--paa;
+ }
+ }
+ return NULL;
+}
+
+
+
+/**
* idr_replace - replace pointer for given id
* @idp: idr handle
* @ptr: pointer you want associated with the id
diff --git a/lib/kobject.c b/lib/kobject.c
index a6dec32f2dd..bacf6fe4f7a 100644
--- a/lib/kobject.c
+++ b/lib/kobject.c
@@ -218,6 +218,9 @@ int kobject_set_name_vargs(struct kobject *kobj, const char *fmt,
const char *old_name = kobj->name;
char *s;
+ if (kobj->name && !fmt)
+ return 0;
+
kobj->name = kvasprintf(GFP_KERNEL, fmt, vargs);
if (!kobj->name)
return -ENOMEM;
diff --git a/lib/kobject_uevent.c b/lib/kobject_uevent.c
index 97a777ad4f5..920a3ca6e25 100644
--- a/lib/kobject_uevent.c
+++ b/lib/kobject_uevent.c
@@ -258,7 +258,7 @@ int kobject_uevent_env(struct kobject *kobj, enum kobject_action action,
goto exit;
retval = call_usermodehelper(argv[0], argv,
- env->envp, UMH_NO_WAIT);
+ env->envp, UMH_WAIT_EXEC);
}
exit:
@@ -328,7 +328,7 @@ static int __init kobject_uevent_init(void)
"kobject_uevent: unable to create netlink socket!\n");
return -ENODEV;
}
-
+ netlink_set_nonroot(NETLINK_KOBJECT_UEVENT, NL_NONROOT_RECV);
return 0;
}
diff --git a/lib/locking-selftest.c b/lib/locking-selftest.c
index 280332c1827..619313ed6c4 100644
--- a/lib/locking-selftest.c
+++ b/lib/locking-selftest.c
@@ -157,11 +157,11 @@ static void init_shared_classes(void)
#define SOFTIRQ_ENTER() \
local_bh_disable(); \
local_irq_disable(); \
- trace_softirq_enter(); \
+ lockdep_softirq_enter(); \
WARN_ON(!in_softirq());
#define SOFTIRQ_EXIT() \
- trace_softirq_exit(); \
+ lockdep_softirq_exit(); \
local_irq_enable(); \
local_bh_enable();
diff --git a/lib/scatterlist.c b/lib/scatterlist.c
index b7b449dafbe..a295e404e90 100644
--- a/lib/scatterlist.c
+++ b/lib/scatterlist.c
@@ -347,9 +347,12 @@ bool sg_miter_next(struct sg_mapping_iter *miter)
sg_miter_stop(miter);
/* get to the next sg if necessary. __offset is adjusted by stop */
- if (miter->__offset == miter->__sg->length && --miter->__nents) {
- miter->__sg = sg_next(miter->__sg);
- miter->__offset = 0;
+ while (miter->__offset == miter->__sg->length) {
+ if (--miter->__nents) {
+ miter->__sg = sg_next(miter->__sg);
+ miter->__offset = 0;
+ } else
+ return false;
}
/* map the next page */
diff --git a/lib/swiotlb.c b/lib/swiotlb.c
index 32e2bd3b114..2b0b5a7d2ce 100644
--- a/lib/swiotlb.c
+++ b/lib/swiotlb.c
@@ -549,7 +549,7 @@ swiotlb_alloc_coherent(struct device *hwdev, size_t size,
dma_addr_t dev_addr;
void *ret;
int order = get_order(size);
- u64 dma_mask = DMA_32BIT_MASK;
+ u64 dma_mask = DMA_BIT_MASK(32);
if (hwdev && hwdev->coherent_dma_mask)
dma_mask = hwdev->coherent_dma_mask;
diff --git a/lib/vsprintf.c b/lib/vsprintf.c
index 0fbd0121d91..7536acea135 100644
--- a/lib/vsprintf.c
+++ b/lib/vsprintf.c
@@ -396,7 +396,38 @@ static noinline char* put_dec(char *buf, unsigned long long num)
#define SMALL 32 /* Must be 32 == 0x20 */
#define SPECIAL 64 /* 0x */
-static char *number(char *buf, char *end, unsigned long long num, int base, int size, int precision, int type)
+enum format_type {
+ FORMAT_TYPE_NONE, /* Just a string part */
+ FORMAT_TYPE_WIDTH,
+ FORMAT_TYPE_PRECISION,
+ FORMAT_TYPE_CHAR,
+ FORMAT_TYPE_STR,
+ FORMAT_TYPE_PTR,
+ FORMAT_TYPE_PERCENT_CHAR,
+ FORMAT_TYPE_INVALID,
+ FORMAT_TYPE_LONG_LONG,
+ FORMAT_TYPE_ULONG,
+ FORMAT_TYPE_LONG,
+ FORMAT_TYPE_USHORT,
+ FORMAT_TYPE_SHORT,
+ FORMAT_TYPE_UINT,
+ FORMAT_TYPE_INT,
+ FORMAT_TYPE_NRCHARS,
+ FORMAT_TYPE_SIZE_T,
+ FORMAT_TYPE_PTRDIFF
+};
+
+struct printf_spec {
+ enum format_type type;
+ int flags; /* flags to number() */
+ int field_width; /* width of output field */
+ int base;
+ int precision; /* # of digits/chars */
+ int qualifier;
+};
+
+static char *number(char *buf, char *end, unsigned long long num,
+ struct printf_spec spec)
{
/* we are called with base 8, 10 or 16, only, thus don't need "G..." */
static const char digits[16] = "0123456789ABCDEF"; /* "GHIJKLMNOPQRSTUVWXYZ"; */
@@ -404,32 +435,32 @@ static char *number(char *buf, char *end, unsigned long long num, int base, int
char tmp[66];
char sign;
char locase;
- int need_pfx = ((type & SPECIAL) && base != 10);
+ int need_pfx = ((spec.flags & SPECIAL) && spec.base != 10);
int i;
/* locase = 0 or 0x20. ORing digits or letters with 'locase'
* produces same digits or (maybe lowercased) letters */
- locase = (type & SMALL);
- if (type & LEFT)
- type &= ~ZEROPAD;
+ locase = (spec.flags & SMALL);
+ if (spec.flags & LEFT)
+ spec.flags &= ~ZEROPAD;
sign = 0;
- if (type & SIGN) {
+ if (spec.flags & SIGN) {
if ((signed long long) num < 0) {
sign = '-';
num = - (signed long long) num;
- size--;
- } else if (type & PLUS) {
+ spec.field_width--;
+ } else if (spec.flags & PLUS) {
sign = '+';
- size--;
- } else if (type & SPACE) {
+ spec.field_width--;
+ } else if (spec.flags & SPACE) {
sign = ' ';
- size--;
+ spec.field_width--;
}
}
if (need_pfx) {
- size--;
- if (base == 16)
- size--;
+ spec.field_width--;
+ if (spec.base == 16)
+ spec.field_width--;
}
/* generate full string in tmp[], in reverse order */
@@ -441,10 +472,10 @@ static char *number(char *buf, char *end, unsigned long long num, int base, int
tmp[i++] = (digits[do_div(num,base)] | locase);
} while (num != 0);
*/
- else if (base != 10) { /* 8 or 16 */
- int mask = base - 1;
+ else if (spec.base != 10) { /* 8 or 16 */
+ int mask = spec.base - 1;
int shift = 3;
- if (base == 16) shift = 4;
+ if (spec.base == 16) shift = 4;
do {
tmp[i++] = (digits[((unsigned char)num) & mask] | locase);
num >>= shift;
@@ -454,12 +485,12 @@ static char *number(char *buf, char *end, unsigned long long num, int base, int
}
/* printing 100 using %2d gives "100", not "00" */
- if (i > precision)
- precision = i;
+ if (i > spec.precision)
+ spec.precision = i;
/* leading space padding */
- size -= precision;
- if (!(type & (ZEROPAD+LEFT))) {
- while(--size >= 0) {
+ spec.field_width -= spec.precision;
+ if (!(spec.flags & (ZEROPAD+LEFT))) {
+ while(--spec.field_width >= 0) {
if (buf < end)
*buf = ' ';
++buf;
@@ -476,23 +507,23 @@ static char *number(char *buf, char *end, unsigned long long num, int base, int
if (buf < end)
*buf = '0';
++buf;
- if (base == 16) {
+ if (spec.base == 16) {
if (buf < end)
*buf = ('X' | locase);
++buf;
}
}
/* zero or space padding */
- if (!(type & LEFT)) {
- char c = (type & ZEROPAD) ? '0' : ' ';
- while (--size >= 0) {
+ if (!(spec.flags & LEFT)) {
+ char c = (spec.flags & ZEROPAD) ? '0' : ' ';
+ while (--spec.field_width >= 0) {
if (buf < end)
*buf = c;
++buf;
}
}
/* hmm even more zero padding? */
- while (i <= --precision) {
+ while (i <= --spec.precision) {
if (buf < end)
*buf = '0';
++buf;
@@ -504,7 +535,7 @@ static char *number(char *buf, char *end, unsigned long long num, int base, int
++buf;
}
/* trailing space padding */
- while (--size >= 0) {
+ while (--spec.field_width >= 0) {
if (buf < end)
*buf = ' ';
++buf;
@@ -512,17 +543,17 @@ static char *number(char *buf, char *end, unsigned long long num, int base, int
return buf;
}
-static char *string(char *buf, char *end, char *s, int field_width, int precision, int flags)
+static char *string(char *buf, char *end, char *s, struct printf_spec spec)
{
int len, i;
if ((unsigned long)s < PAGE_SIZE)
s = "<NULL>";
- len = strnlen(s, precision);
+ len = strnlen(s, spec.precision);
- if (!(flags & LEFT)) {
- while (len < field_width--) {
+ if (!(spec.flags & LEFT)) {
+ while (len < spec.field_width--) {
if (buf < end)
*buf = ' ';
++buf;
@@ -533,7 +564,7 @@ static char *string(char *buf, char *end, char *s, int field_width, int precisio
*buf = *s;
++buf; ++s;
}
- while (len < field_width--) {
+ while (len < spec.field_width--) {
if (buf < end)
*buf = ' ';
++buf;
@@ -541,21 +572,24 @@ static char *string(char *buf, char *end, char *s, int field_width, int precisio
return buf;
}
-static char *symbol_string(char *buf, char *end, void *ptr, int field_width, int precision, int flags)
+static char *symbol_string(char *buf, char *end, void *ptr,
+ struct printf_spec spec)
{
unsigned long value = (unsigned long) ptr;
#ifdef CONFIG_KALLSYMS
char sym[KSYM_SYMBOL_LEN];
sprint_symbol(sym, value);
- return string(buf, end, sym, field_width, precision, flags);
+ return string(buf, end, sym, spec);
#else
- field_width = 2*sizeof(void *);
- flags |= SPECIAL | SMALL | ZEROPAD;
- return number(buf, end, value, 16, field_width, precision, flags);
+ spec.field_width = 2*sizeof(void *);
+ spec.flags |= SPECIAL | SMALL | ZEROPAD;
+ spec.base = 16;
+ return number(buf, end, value, spec);
#endif
}
-static char *resource_string(char *buf, char *end, struct resource *res, int field_width, int precision, int flags)
+static char *resource_string(char *buf, char *end, struct resource *res,
+ struct printf_spec spec)
{
#ifndef IO_RSRC_PRINTK_SIZE
#define IO_RSRC_PRINTK_SIZE 4
@@ -564,7 +598,11 @@ static char *resource_string(char *buf, char *end, struct resource *res, int fie
#ifndef MEM_RSRC_PRINTK_SIZE
#define MEM_RSRC_PRINTK_SIZE 8
#endif
-
+ struct printf_spec num_spec = {
+ .base = 16,
+ .precision = -1,
+ .flags = SPECIAL | SMALL | ZEROPAD,
+ };
/* room for the actual numbers, the two "0x", -, [, ] and the final zero */
char sym[4*sizeof(resource_size_t) + 8];
char *p = sym, *pend = sym + sizeof(sym);
@@ -576,17 +614,18 @@ static char *resource_string(char *buf, char *end, struct resource *res, int fie
size = MEM_RSRC_PRINTK_SIZE;
*p++ = '[';
- p = number(p, pend, res->start, 16, size, -1, SPECIAL | SMALL | ZEROPAD);
+ num_spec.field_width = size;
+ p = number(p, pend, res->start, num_spec);
*p++ = '-';
- p = number(p, pend, res->end, 16, size, -1, SPECIAL | SMALL | ZEROPAD);
+ p = number(p, pend, res->end, num_spec);
*p++ = ']';
*p = 0;
- return string(buf, end, sym, field_width, precision, flags);
+ return string(buf, end, sym, spec);
}
-static char *mac_address_string(char *buf, char *end, u8 *addr, int field_width,
- int precision, int flags)
+static char *mac_address_string(char *buf, char *end, u8 *addr,
+ struct printf_spec spec)
{
char mac_addr[6 * 3]; /* (6 * 2 hex digits), 5 colons and trailing zero */
char *p = mac_addr;
@@ -594,16 +633,17 @@ static char *mac_address_string(char *buf, char *end, u8 *addr, int field_width,
for (i = 0; i < 6; i++) {
p = pack_hex_byte(p, addr[i]);
- if (!(flags & SPECIAL) && i != 5)
+ if (!(spec.flags & SPECIAL) && i != 5)
*p++ = ':';
}
*p = '\0';
+ spec.flags &= ~SPECIAL;
- return string(buf, end, mac_addr, field_width, precision, flags & ~SPECIAL);
+ return string(buf, end, mac_addr, spec);
}
-static char *ip6_addr_string(char *buf, char *end, u8 *addr, int field_width,
- int precision, int flags)
+static char *ip6_addr_string(char *buf, char *end, u8 *addr,
+ struct printf_spec spec)
{
char ip6_addr[8 * 5]; /* (8 * 4 hex digits), 7 colons and trailing zero */
char *p = ip6_addr;
@@ -612,16 +652,17 @@ static char *ip6_addr_string(char *buf, char *end, u8 *addr, int field_width,
for (i = 0; i < 8; i++) {
p = pack_hex_byte(p, addr[2 * i]);
p = pack_hex_byte(p, addr[2 * i + 1]);
- if (!(flags & SPECIAL) && i != 7)
+ if (!(spec.flags & SPECIAL) && i != 7)
*p++ = ':';
}
*p = '\0';
+ spec.flags &= ~SPECIAL;
- return string(buf, end, ip6_addr, field_width, precision, flags & ~SPECIAL);
+ return string(buf, end, ip6_addr, spec);
}
-static char *ip4_addr_string(char *buf, char *end, u8 *addr, int field_width,
- int precision, int flags)
+static char *ip4_addr_string(char *buf, char *end, u8 *addr,
+ struct printf_spec spec)
{
char ip4_addr[4 * 4]; /* (4 * 3 decimal digits), 3 dots and trailing zero */
char temp[3]; /* hold each IP quad in reverse order */
@@ -637,8 +678,9 @@ static char *ip4_addr_string(char *buf, char *end, u8 *addr, int field_width,
*p++ = '.';
}
*p = '\0';
+ spec.flags &= ~SPECIAL;
- return string(buf, end, ip4_addr, field_width, precision, flags & ~SPECIAL);
+ return string(buf, end, ip4_addr, spec);
}
/*
@@ -663,41 +705,233 @@ static char *ip4_addr_string(char *buf, char *end, u8 *addr, int field_width,
* function pointers are really function descriptors, which contain a
* pointer to the real address.
*/
-static char *pointer(const char *fmt, char *buf, char *end, void *ptr, int field_width, int precision, int flags)
+static char *pointer(const char *fmt, char *buf, char *end, void *ptr,
+ struct printf_spec spec)
{
if (!ptr)
- return string(buf, end, "(null)", field_width, precision, flags);
+ return string(buf, end, "(null)", spec);
switch (*fmt) {
case 'F':
ptr = dereference_function_descriptor(ptr);
/* Fallthrough */
case 'S':
- return symbol_string(buf, end, ptr, field_width, precision, flags);
+ return symbol_string(buf, end, ptr, spec);
case 'R':
- return resource_string(buf, end, ptr, field_width, precision, flags);
+ return resource_string(buf, end, ptr, spec);
case 'm':
- flags |= SPECIAL;
+ spec.flags |= SPECIAL;
/* Fallthrough */
case 'M':
- return mac_address_string(buf, end, ptr, field_width, precision, flags);
+ return mac_address_string(buf, end, ptr, spec);
case 'i':
- flags |= SPECIAL;
+ spec.flags |= SPECIAL;
/* Fallthrough */
case 'I':
if (fmt[1] == '6')
- return ip6_addr_string(buf, end, ptr, field_width, precision, flags);
+ return ip6_addr_string(buf, end, ptr, spec);
if (fmt[1] == '4')
- return ip4_addr_string(buf, end, ptr, field_width, precision, flags);
- flags &= ~SPECIAL;
+ return ip4_addr_string(buf, end, ptr, spec);
+ spec.flags &= ~SPECIAL;
break;
}
- flags |= SMALL;
- if (field_width == -1) {
- field_width = 2*sizeof(void *);
- flags |= ZEROPAD;
+ spec.flags |= SMALL;
+ if (spec.field_width == -1) {
+ spec.field_width = 2*sizeof(void *);
+ spec.flags |= ZEROPAD;
}
- return number(buf, end, (unsigned long) ptr, 16, field_width, precision, flags);
+ spec.base = 16;
+
+ return number(buf, end, (unsigned long) ptr, spec);
+}
+
+/*
+ * Helper function to decode printf style format.
+ * Each call decode a token from the format and return the
+ * number of characters read (or likely the delta where it wants
+ * to go on the next call).
+ * The decoded token is returned through the parameters
+ *
+ * 'h', 'l', or 'L' for integer fields
+ * 'z' support added 23/7/1999 S.H.
+ * 'z' changed to 'Z' --davidm 1/25/99
+ * 't' added for ptrdiff_t
+ *
+ * @fmt: the format string
+ * @type of the token returned
+ * @flags: various flags such as +, -, # tokens..
+ * @field_width: overwritten width
+ * @base: base of the number (octal, hex, ...)
+ * @precision: precision of a number
+ * @qualifier: qualifier of a number (long, size_t, ...)
+ */
+static int format_decode(const char *fmt, struct printf_spec *spec)
+{
+ const char *start = fmt;
+
+ /* we finished early by reading the field width */
+ if (spec->type == FORMAT_TYPE_WIDTH) {
+ if (spec->field_width < 0) {
+ spec->field_width = -spec->field_width;
+ spec->flags |= LEFT;
+ }
+ spec->type = FORMAT_TYPE_NONE;
+ goto precision;
+ }
+
+ /* we finished early by reading the precision */
+ if (spec->type == FORMAT_TYPE_PRECISION) {
+ if (spec->precision < 0)
+ spec->precision = 0;
+
+ spec->type = FORMAT_TYPE_NONE;
+ goto qualifier;
+ }
+
+ /* By default */
+ spec->type = FORMAT_TYPE_NONE;
+
+ for (; *fmt ; ++fmt) {
+ if (*fmt == '%')
+ break;
+ }
+
+ /* Return the current non-format string */
+ if (fmt != start || !*fmt)
+ return fmt - start;
+
+ /* Process flags */
+ spec->flags = 0;
+
+ while (1) { /* this also skips first '%' */
+ bool found = true;
+
+ ++fmt;
+
+ switch (*fmt) {
+ case '-': spec->flags |= LEFT; break;
+ case '+': spec->flags |= PLUS; break;
+ case ' ': spec->flags |= SPACE; break;
+ case '#': spec->flags |= SPECIAL; break;
+ case '0': spec->flags |= ZEROPAD; break;
+ default: found = false;
+ }
+
+ if (!found)
+ break;
+ }
+
+ /* get field width */
+ spec->field_width = -1;
+
+ if (isdigit(*fmt))
+ spec->field_width = skip_atoi(&fmt);
+ else if (*fmt == '*') {
+ /* it's the next argument */
+ spec->type = FORMAT_TYPE_WIDTH;
+ return ++fmt - start;
+ }
+
+precision:
+ /* get the precision */
+ spec->precision = -1;
+ if (*fmt == '.') {
+ ++fmt;
+ if (isdigit(*fmt)) {
+ spec->precision = skip_atoi(&fmt);
+ if (spec->precision < 0)
+ spec->precision = 0;
+ } else if (*fmt == '*') {
+ /* it's the next argument */
+ spec->type = FORMAT_TYPE_PRECISION;
+ return ++fmt - start;
+ }
+ }
+
+qualifier:
+ /* get the conversion qualifier */
+ spec->qualifier = -1;
+ if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' ||
+ *fmt == 'Z' || *fmt == 'z' || *fmt == 't') {
+ spec->qualifier = *fmt;
+ ++fmt;
+ if (spec->qualifier == 'l' && *fmt == 'l') {
+ spec->qualifier = 'L';
+ ++fmt;
+ }
+ }
+
+ /* default base */
+ spec->base = 10;
+ switch (*fmt) {
+ case 'c':
+ spec->type = FORMAT_TYPE_CHAR;
+ return ++fmt - start;
+
+ case 's':
+ spec->type = FORMAT_TYPE_STR;
+ return ++fmt - start;
+
+ case 'p':
+ spec->type = FORMAT_TYPE_PTR;
+ return fmt - start;
+ /* skip alnum */
+
+ case 'n':
+ spec->type = FORMAT_TYPE_NRCHARS;
+ return ++fmt - start;
+
+ case '%':
+ spec->type = FORMAT_TYPE_PERCENT_CHAR;
+ return ++fmt - start;
+
+ /* integer number formats - set up the flags and "break" */
+ case 'o':
+ spec->base = 8;
+ break;
+
+ case 'x':
+ spec->flags |= SMALL;
+
+ case 'X':
+ spec->base = 16;
+ break;
+
+ case 'd':
+ case 'i':
+ spec->flags |= SIGN;
+ case 'u':
+ break;
+
+ default:
+ spec->type = FORMAT_TYPE_INVALID;
+ return fmt - start;
+ }
+
+ if (spec->qualifier == 'L')
+ spec->type = FORMAT_TYPE_LONG_LONG;
+ else if (spec->qualifier == 'l') {
+ if (spec->flags & SIGN)
+ spec->type = FORMAT_TYPE_LONG;
+ else
+ spec->type = FORMAT_TYPE_ULONG;
+ } else if (spec->qualifier == 'Z' || spec->qualifier == 'z') {
+ spec->type = FORMAT_TYPE_SIZE_T;
+ } else if (spec->qualifier == 't') {
+ spec->type = FORMAT_TYPE_PTRDIFF;
+ } else if (spec->qualifier == 'h') {
+ if (spec->flags & SIGN)
+ spec->type = FORMAT_TYPE_SHORT;
+ else
+ spec->type = FORMAT_TYPE_USHORT;
+ } else {
+ if (spec->flags & SIGN)
+ spec->type = FORMAT_TYPE_INT;
+ else
+ spec->type = FORMAT_TYPE_UINT;
+ }
+
+ return ++fmt - start;
}
/**
@@ -726,18 +960,9 @@ static char *pointer(const char *fmt, char *buf, char *end, void *ptr, int field
int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
{
unsigned long long num;
- int base;
char *str, *end, c;
-
- int flags; /* flags to number() */
-
- int field_width; /* width of output field */
- int precision; /* min. # of digits for integers; max
- number of chars for from string */
- int qualifier; /* 'h', 'l', or 'L' for integer fields */
- /* 'z' support added 23/7/1999 S.H. */
- /* 'z' changed to 'Z' --davidm 1/25/99 */
- /* 't' added for ptrdiff_t */
+ int read;
+ struct printf_spec spec = {0};
/* Reject out-of-range values early. Large positive sizes are
used for unknown buffer sizes. */
@@ -758,184 +983,137 @@ int vsnprintf(char *buf, size_t size, const char *fmt, va_list args)
size = end - buf;
}
- for (; *fmt ; ++fmt) {
- if (*fmt != '%') {
- if (str < end)
- *str = *fmt;
- ++str;
- continue;
- }
+ while (*fmt) {
+ const char *old_fmt = fmt;
- /* process flags */
- flags = 0;
- repeat:
- ++fmt; /* this also skips first '%' */
- switch (*fmt) {
- case '-': flags |= LEFT; goto repeat;
- case '+': flags |= PLUS; goto repeat;
- case ' ': flags |= SPACE; goto repeat;
- case '#': flags |= SPECIAL; goto repeat;
- case '0': flags |= ZEROPAD; goto repeat;
- }
+ read = format_decode(fmt, &spec);
- /* get field width */
- field_width = -1;
- if (isdigit(*fmt))
- field_width = skip_atoi(&fmt);
- else if (*fmt == '*') {
- ++fmt;
- /* it's the next argument */
- field_width = va_arg(args, int);
- if (field_width < 0) {
- field_width = -field_width;
- flags |= LEFT;
- }
- }
+ fmt += read;
- /* get the precision */
- precision = -1;
- if (*fmt == '.') {
- ++fmt;
- if (isdigit(*fmt))
- precision = skip_atoi(&fmt);
- else if (*fmt == '*') {
- ++fmt;
- /* it's the next argument */
- precision = va_arg(args, int);
+ switch (spec.type) {
+ case FORMAT_TYPE_NONE: {
+ int copy = read;
+ if (str < end) {
+ if (copy > end - str)
+ copy = end - str;
+ memcpy(str, old_fmt, copy);
}
- if (precision < 0)
- precision = 0;
+ str += read;
+ break;
}
- /* get the conversion qualifier */
- qualifier = -1;
- if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L' ||
- *fmt =='Z' || *fmt == 'z' || *fmt == 't') {
- qualifier = *fmt;
- ++fmt;
- if (qualifier == 'l' && *fmt == 'l') {
- qualifier = 'L';
- ++fmt;
- }
- }
+ case FORMAT_TYPE_WIDTH:
+ spec.field_width = va_arg(args, int);
+ break;
- /* default base */
- base = 10;
+ case FORMAT_TYPE_PRECISION:
+ spec.precision = va_arg(args, int);
+ break;
- switch (*fmt) {
- case 'c':
- if (!(flags & LEFT)) {
- while (--field_width > 0) {
- if (str < end)
- *str = ' ';
- ++str;
- }
- }
- c = (unsigned char) va_arg(args, int);
- if (str < end)
- *str = c;
- ++str;
- while (--field_width > 0) {
+ case FORMAT_TYPE_CHAR:
+ if (!(spec.flags & LEFT)) {
+ while (--spec.field_width > 0) {
if (str < end)
*str = ' ';
++str;
- }
- continue;
-
- case 's':
- str = string(str, end, va_arg(args, char *), field_width, precision, flags);
- continue;
-
- case 'p':
- str = pointer(fmt+1, str, end,
- va_arg(args, void *),
- field_width, precision, flags);
- /* Skip all alphanumeric pointer suffixes */
- while (isalnum(fmt[1]))
- fmt++;
- continue;
-
- case 'n':
- /* FIXME:
- * What does C99 say about the overflow case here? */
- if (qualifier == 'l') {
- long * ip = va_arg(args, long *);
- *ip = (str - buf);
- } else if (qualifier == 'Z' || qualifier == 'z') {
- size_t * ip = va_arg(args, size_t *);
- *ip = (str - buf);
- } else {
- int * ip = va_arg(args, int *);
- *ip = (str - buf);
- }
- continue;
- case '%':
+ }
+ }
+ c = (unsigned char) va_arg(args, int);
+ if (str < end)
+ *str = c;
+ ++str;
+ while (--spec.field_width > 0) {
if (str < end)
- *str = '%';
+ *str = ' ';
++str;
- continue;
+ }
+ break;
- /* integer number formats - set up the flags and "break" */
- case 'o':
- base = 8;
- break;
+ case FORMAT_TYPE_STR:
+ str = string(str, end, va_arg(args, char *), spec);
+ break;
- case 'x':
- flags |= SMALL;
- case 'X':
- base = 16;
- break;
+ case FORMAT_TYPE_PTR:
+ str = pointer(fmt+1, str, end, va_arg(args, void *),
+ spec);
+ while (isalnum(*fmt))
+ fmt++;
+ break;
- case 'd':
- case 'i':
- flags |= SIGN;
- case 'u':
- break;
+ case FORMAT_TYPE_PERCENT_CHAR:
+ if (str < end)
+ *str = '%';
+ ++str;
+ break;
- default:
- if (str < end)
- *str = '%';
- ++str;
- if (*fmt) {
- if (str < end)
- *str = *fmt;
- ++str;
- } else {
- --fmt;
- }
- continue;
+ case FORMAT_TYPE_INVALID:
+ if (str < end)
+ *str = '%';
+ ++str;
+ break;
+
+ case FORMAT_TYPE_NRCHARS: {
+ int qualifier = spec.qualifier;
+
+ if (qualifier == 'l') {
+ long *ip = va_arg(args, long *);
+ *ip = (str - buf);
+ } else if (qualifier == 'Z' ||
+ qualifier == 'z') {
+ size_t *ip = va_arg(args, size_t *);
+ *ip = (str - buf);
+ } else {
+ int *ip = va_arg(args, int *);
+ *ip = (str - buf);
+ }
+ break;
}
- if (qualifier == 'L')
- num = va_arg(args, long long);
- else if (qualifier == 'l') {
- num = va_arg(args, unsigned long);
- if (flags & SIGN)
- num = (signed long) num;
- } else if (qualifier == 'Z' || qualifier == 'z') {
- num = va_arg(args, size_t);
- } else if (qualifier == 't') {
- num = va_arg(args, ptrdiff_t);
- } else if (qualifier == 'h') {
- num = (unsigned short) va_arg(args, int);
- if (flags & SIGN)
- num = (signed short) num;
- } else {
- num = va_arg(args, unsigned int);
- if (flags & SIGN)
- num = (signed int) num;
+
+ default:
+ switch (spec.type) {
+ case FORMAT_TYPE_LONG_LONG:
+ num = va_arg(args, long long);
+ break;
+ case FORMAT_TYPE_ULONG:
+ num = va_arg(args, unsigned long);
+ break;
+ case FORMAT_TYPE_LONG:
+ num = va_arg(args, long);
+ break;
+ case FORMAT_TYPE_SIZE_T:
+ num = va_arg(args, size_t);
+ break;
+ case FORMAT_TYPE_PTRDIFF:
+ num = va_arg(args, ptrdiff_t);
+ break;
+ case FORMAT_TYPE_USHORT:
+ num = (unsigned short) va_arg(args, int);
+ break;
+ case FORMAT_TYPE_SHORT:
+ num = (short) va_arg(args, int);
+ break;
+ case FORMAT_TYPE_INT:
+ num = (int) va_arg(args, int);
+ break;
+ default:
+ num = va_arg(args, unsigned int);
+ }
+
+ str = number(str, end, num, spec);
}
- str = number(str, end, num, base,
- field_width, precision, flags);
}
+
if (size > 0) {
if (str < end)
*str = '\0';
else
end[-1] = '\0';
}
+
/* the trailing null byte doesn't count towards the total */
return str-buf;
+
}
EXPORT_SYMBOL(vsnprintf);
@@ -1058,6 +1236,363 @@ int sprintf(char * buf, const char *fmt, ...)
}
EXPORT_SYMBOL(sprintf);
+#ifdef CONFIG_BINARY_PRINTF
+/*
+ * bprintf service:
+ * vbin_printf() - VA arguments to binary data
+ * bstr_printf() - Binary data to text string
+ */
+
+/**
+ * vbin_printf - Parse a format string and place args' binary value in a buffer
+ * @bin_buf: The buffer to place args' binary value
+ * @size: The size of the buffer(by words(32bits), not characters)
+ * @fmt: The format string to use
+ * @args: Arguments for the format string
+ *
+ * The format follows C99 vsnprintf, except %n is ignored, and its argument
+ * is skiped.
+ *
+ * The return value is the number of words(32bits) which would be generated for
+ * the given input.
+ *
+ * NOTE:
+ * If the return value is greater than @size, the resulting bin_buf is NOT
+ * valid for bstr_printf().
+ */
+int vbin_printf(u32 *bin_buf, size_t size, const char *fmt, va_list args)
+{
+ struct printf_spec spec = {0};
+ char *str, *end;
+ int read;
+
+ str = (char *)bin_buf;
+ end = (char *)(bin_buf + size);
+
+#define save_arg(type) \
+do { \
+ if (sizeof(type) == 8) { \
+ unsigned long long value; \
+ str = PTR_ALIGN(str, sizeof(u32)); \
+ value = va_arg(args, unsigned long long); \
+ if (str + sizeof(type) <= end) { \
+ *(u32 *)str = *(u32 *)&value; \
+ *(u32 *)(str + 4) = *((u32 *)&value + 1); \
+ } \
+ } else { \
+ unsigned long value; \
+ str = PTR_ALIGN(str, sizeof(type)); \
+ value = va_arg(args, int); \
+ if (str + sizeof(type) <= end) \
+ *(typeof(type) *)str = (type)value; \
+ } \
+ str += sizeof(type); \
+} while (0)
+
+
+ while (*fmt) {
+ read = format_decode(fmt, &spec);
+
+ fmt += read;
+
+ switch (spec.type) {
+ case FORMAT_TYPE_NONE:
+ break;
+
+ case FORMAT_TYPE_WIDTH:
+ case FORMAT_TYPE_PRECISION:
+ save_arg(int);
+ break;
+
+ case FORMAT_TYPE_CHAR:
+ save_arg(char);
+ break;
+
+ case FORMAT_TYPE_STR: {
+ const char *save_str = va_arg(args, char *);
+ size_t len;
+ if ((unsigned long)save_str > (unsigned long)-PAGE_SIZE
+ || (unsigned long)save_str < PAGE_SIZE)
+ save_str = "<NULL>";
+ len = strlen(save_str);
+ if (str + len + 1 < end)
+ memcpy(str, save_str, len + 1);
+ str += len + 1;
+ break;
+ }
+
+ case FORMAT_TYPE_PTR:
+ save_arg(void *);
+ /* skip all alphanumeric pointer suffixes */
+ while (isalnum(*fmt))
+ fmt++;
+ break;
+
+ case FORMAT_TYPE_PERCENT_CHAR:
+ break;
+
+ case FORMAT_TYPE_INVALID:
+ break;
+
+ case FORMAT_TYPE_NRCHARS: {
+ /* skip %n 's argument */
+ int qualifier = spec.qualifier;
+ void *skip_arg;
+ if (qualifier == 'l')
+ skip_arg = va_arg(args, long *);
+ else if (qualifier == 'Z' || qualifier == 'z')
+ skip_arg = va_arg(args, size_t *);
+ else
+ skip_arg = va_arg(args, int *);
+ break;
+ }
+
+ default:
+ switch (spec.type) {
+
+ case FORMAT_TYPE_LONG_LONG:
+ save_arg(long long);
+ break;
+ case FORMAT_TYPE_ULONG:
+ case FORMAT_TYPE_LONG:
+ save_arg(unsigned long);
+ break;
+ case FORMAT_TYPE_SIZE_T:
+ save_arg(size_t);
+ break;
+ case FORMAT_TYPE_PTRDIFF:
+ save_arg(ptrdiff_t);
+ break;
+ case FORMAT_TYPE_USHORT:
+ case FORMAT_TYPE_SHORT:
+ save_arg(short);
+ break;
+ default:
+ save_arg(int);
+ }
+ }
+ }
+ return (u32 *)(PTR_ALIGN(str, sizeof(u32))) - bin_buf;
+
+#undef save_arg
+}
+EXPORT_SYMBOL_GPL(vbin_printf);
+
+/**
+ * bstr_printf - Format a string from binary arguments and place it in a buffer
+ * @buf: The buffer to place the result into
+ * @size: The size of the buffer, including the trailing null space
+ * @fmt: The format string to use
+ * @bin_buf: Binary arguments for the format string
+ *
+ * This function like C99 vsnprintf, but the difference is that vsnprintf gets
+ * arguments from stack, and bstr_printf gets arguments from @bin_buf which is
+ * a binary buffer that generated by vbin_printf.
+ *
+ * The format follows C99 vsnprintf, but has some extensions:
+ * %pS output the name of a text symbol
+ * %pF output the name of a function pointer
+ * %pR output the address range in a struct resource
+ * %n is ignored
+ *
+ * The return value is the number of characters which would
+ * be generated for the given input, excluding the trailing
+ * '\0', as per ISO C99. If you want to have the exact
+ * number of characters written into @buf as return value
+ * (not including the trailing '\0'), use vscnprintf(). If the
+ * return is greater than or equal to @size, the resulting
+ * string is truncated.
+ */
+int bstr_printf(char *buf, size_t size, const char *fmt, const u32 *bin_buf)
+{
+ unsigned long long num;
+ char *str, *end, c;
+ const char *args = (const char *)bin_buf;
+
+ struct printf_spec spec = {0};
+
+ if (unlikely((int) size < 0)) {
+ /* There can be only one.. */
+ static char warn = 1;
+ WARN_ON(warn);
+ warn = 0;
+ return 0;
+ }
+
+ str = buf;
+ end = buf + size;
+
+#define get_arg(type) \
+({ \
+ typeof(type) value; \
+ if (sizeof(type) == 8) { \
+ args = PTR_ALIGN(args, sizeof(u32)); \
+ *(u32 *)&value = *(u32 *)args; \
+ *((u32 *)&value + 1) = *(u32 *)(args + 4); \
+ } else { \
+ args = PTR_ALIGN(args, sizeof(type)); \
+ value = *(typeof(type) *)args; \
+ } \
+ args += sizeof(type); \
+ value; \
+})
+
+ /* Make sure end is always >= buf */
+ if (end < buf) {
+ end = ((void *)-1);
+ size = end - buf;
+ }
+
+ while (*fmt) {
+ int read;
+ const char *old_fmt = fmt;
+
+ read = format_decode(fmt, &spec);
+
+ fmt += read;
+
+ switch (spec.type) {
+ case FORMAT_TYPE_NONE: {
+ int copy = read;
+ if (str < end) {
+ if (copy > end - str)
+ copy = end - str;
+ memcpy(str, old_fmt, copy);
+ }
+ str += read;
+ break;
+ }
+
+ case FORMAT_TYPE_WIDTH:
+ spec.field_width = get_arg(int);
+ break;
+
+ case FORMAT_TYPE_PRECISION:
+ spec.precision = get_arg(int);
+ break;
+
+ case FORMAT_TYPE_CHAR:
+ if (!(spec.flags & LEFT)) {
+ while (--spec.field_width > 0) {
+ if (str < end)
+ *str = ' ';
+ ++str;
+ }
+ }
+ c = (unsigned char) get_arg(char);
+ if (str < end)
+ *str = c;
+ ++str;
+ while (--spec.field_width > 0) {
+ if (str < end)
+ *str = ' ';
+ ++str;
+ }
+ break;
+
+ case FORMAT_TYPE_STR: {
+ const char *str_arg = args;
+ size_t len = strlen(str_arg);
+ args += len + 1;
+ str = string(str, end, (char *)str_arg, spec);
+ break;
+ }
+
+ case FORMAT_TYPE_PTR:
+ str = pointer(fmt+1, str, end, get_arg(void *), spec);
+ while (isalnum(*fmt))
+ fmt++;
+ break;
+
+ case FORMAT_TYPE_PERCENT_CHAR:
+ if (str < end)
+ *str = '%';
+ ++str;
+ break;
+
+ case FORMAT_TYPE_INVALID:
+ if (str < end)
+ *str = '%';
+ ++str;
+ break;
+
+ case FORMAT_TYPE_NRCHARS:
+ /* skip */
+ break;
+
+ default:
+ switch (spec.type) {
+
+ case FORMAT_TYPE_LONG_LONG:
+ num = get_arg(long long);
+ break;
+ case FORMAT_TYPE_ULONG:
+ num = get_arg(unsigned long);
+ break;
+ case FORMAT_TYPE_LONG:
+ num = get_arg(unsigned long);
+ break;
+ case FORMAT_TYPE_SIZE_T:
+ num = get_arg(size_t);
+ break;
+ case FORMAT_TYPE_PTRDIFF:
+ num = get_arg(ptrdiff_t);
+ break;
+ case FORMAT_TYPE_USHORT:
+ num = get_arg(unsigned short);
+ break;
+ case FORMAT_TYPE_SHORT:
+ num = get_arg(short);
+ break;
+ case FORMAT_TYPE_UINT:
+ num = get_arg(unsigned int);
+ break;
+ default:
+ num = get_arg(int);
+ }
+
+ str = number(str, end, num, spec);
+ }
+ }
+
+ if (size > 0) {
+ if (str < end)
+ *str = '\0';
+ else
+ end[-1] = '\0';
+ }
+
+#undef get_arg
+
+ /* the trailing null byte doesn't count towards the total */
+ return str - buf;
+}
+EXPORT_SYMBOL_GPL(bstr_printf);
+
+/**
+ * bprintf - Parse a format string and place args' binary value in a buffer
+ * @bin_buf: The buffer to place args' binary value
+ * @size: The size of the buffer(by words(32bits), not characters)
+ * @fmt: The format string to use
+ * @...: Arguments for the format string
+ *
+ * The function returns the number of words(u32) written
+ * into @bin_buf.
+ */
+int bprintf(u32 *bin_buf, size_t size, const char *fmt, ...)
+{
+ va_list args;
+ int ret;
+
+ va_start(args, fmt);
+ ret = vbin_printf(bin_buf, size, fmt, args);
+ va_end(args);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(bprintf);
+
+#endif /* CONFIG_BINARY_PRINTF */
+
/**
* vsscanf - Unformat a buffer into a list of arguments
* @buf: input buffer
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-02 06:11:47 +0000