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authorDamien Miller <djm@mindrot.org>1999-11-11 17:57:39 +1100
committerDamien Miller <djm@mindrot.org>1999-11-11 17:57:39 +1100
commit5ce662a9202240a2f5fa6a9334d58186bdaba50c (patch)
tree9fe37122fa27f070abc3c9c28531877d43673b7f /log-client.c
parentab5e0d0c27e00dca463c67395c2b5941e778836e (diff)
- Merged more OpenBSD CVS changes:
- [auth-krb4.c auth-passwd.c] remove x11- and krb-cleanup from fatal() + krb-cleanup cleanup - [clientloop.c log-client.c log-server.c ] [readconf.c readconf.h servconf.c servconf.h ] [ssh.1 ssh.c ssh.h sshd.8] add LogLevel {QUIET, FATAL, ERROR, INFO, CHAT, DEBUG} to ssh/sshd, obsoletes QuietMode and FascistLogging in sshd.
Diffstat (limited to 'log-client.c')
-rw-r--r--log-client.c137
1 files changed, 31 insertions, 106 deletions
diff --git a/log-client.c b/log-client.c
index 1792ba84..63cc7944 100644
--- a/log-client.c
+++ b/log-client.c
@@ -10,129 +10,54 @@ Copyright (c) 1995 Tatu Ylonen <ylo@cs.hut.fi>, Espoo, Finland
Created: Mon Mar 20 21:13:40 1995 ylo
Client-side versions of debug(), log(), etc. These print to stderr.
+This is a stripped down version of log-server.c.
*/
#include "includes.h"
-RCSID("$Id: log-client.c,v 1.1 1999/10/27 03:42:44 damien Exp $");
+RCSID("$Id: log-client.c,v 1.2 1999/11/11 06:57:39 damien Exp $");
#include "xmalloc.h"
#include "ssh.h"
-static int log_debug = 0;
-static int log_quiet = 0;
+static LogLevel log_level = SYSLOG_LEVEL_INFO;
-void log_init(char *av0, int on_stderr, int debug, int quiet,
- SyslogFacility facility)
-{
- log_debug = debug;
- log_quiet = quiet;
-}
-
-void log(const char *fmt, ...)
-{
- va_list args;
-
- if (log_quiet)
- return;
- va_start(args, fmt);
- vfprintf(stderr, fmt, args);
- fprintf(stderr, "\r\n");
- va_end(args);
-}
-
-void debug(const char *fmt, ...)
-{
- va_list args;
- if (log_quiet || !log_debug)
- return;
- va_start(args, fmt);
- fprintf(stderr, "debug: ");
- vfprintf(stderr, fmt, args);
- fprintf(stderr, "\r\n");
- va_end(args);
-}
-
-void error(const char *fmt, ...)
-{
- va_list args;
- if (log_quiet)
- return;
- va_start(args, fmt);
- vfprintf(stderr, fmt, args);
- fprintf(stderr, "\r\n");
- va_end(args);
-}
-
-struct fatal_cleanup
-{
- struct fatal_cleanup *next;
- void (*proc)(void *);
- void *context;
-};
-
-static struct fatal_cleanup *fatal_cleanups = NULL;
-
-/* Registers a cleanup function to be called by fatal() before exiting. */
-
-void fatal_add_cleanup(void (*proc)(void *), void *context)
-{
- struct fatal_cleanup *cu;
+/* Initialize the log.
+ av0 program name (should be argv[0])
+ level logging level
+ */
- cu = xmalloc(sizeof(*cu));
- cu->proc = proc;
- cu->context = context;
- cu->next = fatal_cleanups;
- fatal_cleanups = cu;
-}
-
-/* Removes a cleanup frunction to be called at fatal(). */
-
-void fatal_remove_cleanup(void (*proc)(void *context), void *context)
+void
+log_init(char *av0, LogLevel level, SyslogFacility ignored1, int ignored2)
{
- struct fatal_cleanup **cup, *cu;
-
- for (cup = &fatal_cleanups; *cup; cup = &cu->next)
+ switch (level)
{
- cu = *cup;
- if (cu->proc == proc && cu->context == context)
- {
- *cup = cu->next;
- xfree(cu);
- return;
- }
+ case SYSLOG_LEVEL_QUIET:
+ case SYSLOG_LEVEL_ERROR:
+ case SYSLOG_LEVEL_FATAL:
+ case SYSLOG_LEVEL_INFO:
+ case SYSLOG_LEVEL_CHAT:
+ case SYSLOG_LEVEL_DEBUG:
+ log_level = level;
+ break;
+ default:
+ /* unchanged */
+ break;
}
- fatal("fatal_remove_cleanup: no such cleanup function: 0x%lx 0x%lx\n",
- (unsigned long)proc, (unsigned long)context);
}
-/* Function to display an error message and exit. This is in this file because
- this needs to restore terminal modes before exiting. See log-client.c
- for other related functions. */
+#define MSGBUFSIZE 1024
-void fatal(const char *fmt, ...)
+void
+do_log(LogLevel level, const char *fmt, va_list args)
{
- va_list args;
- struct fatal_cleanup *cu, *next_cu;
- static int fatal_called = 0;
-
- if (!fatal_called)
- {
- fatal_called = 1;
+ char msgbuf[MSGBUFSIZE];
- /* Call cleanup functions. */
- for (cu = fatal_cleanups; cu; cu = next_cu)
- {
- next_cu = cu->next;
- (*cu->proc)(cu->context);
- }
- }
-
- va_start(args, fmt);
- vfprintf(stderr, fmt, args);
+ if (level > log_level)
+ return;
+ if (level == SYSLOG_LEVEL_DEBUG)
+ fprintf(stderr, "debug: ");
+ vsnprintf(msgbuf, sizeof(msgbuf), fmt, args);
+ fprintf(stderr, "%s", msgbuf);
fprintf(stderr, "\r\n");
- va_end(args);
- exit(255);
}
-
-/* fatal() is in ssh.c so that it can properly reset terminal modes. */
: #dd2200; background-color: #fff0f0 } /* Literal.String.Single */ .highlight .ss { color: #aa6600; background-color: #fff0f0 } /* Literal.String.Symbol */ .highlight .bp { color: #003388 } /* Name.Builtin.Pseudo */ .highlight .fm { color: #0066bb; font-weight: bold } /* Name.Function.Magic */ .highlight .vc { color: #336699 } /* Name.Variable.Class */ .highlight .vg { color: #dd7700 } /* Name.Variable.Global */ .highlight .vi { color: #3333bb } /* Name.Variable.Instance */ .highlight .vm { color: #336699 } /* Name.Variable.Magic */ .highlight .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */
/* bounce buffer handling for block devices
 *
 * - Split from highmem.c
 */

#include <linux/mm.h>
#include <linux/export.h>
#include <linux/swap.h>
#include <linux/gfp.h>
#include <linux/bio.h>
#include <linux/pagemap.h>
#include <linux/mempool.h>
#include <linux/blkdev.h>
#include <linux/init.h>
#include <linux/hash.h>
#include <linux/highmem.h>
#include <linux/bootmem.h>
#include <asm/tlbflush.h>

#include <trace/events/block.h>

#define POOL_SIZE	64
#define ISA_POOL_SIZE	16

static mempool_t *page_pool, *isa_page_pool;

#if defined(CONFIG_HIGHMEM) || defined(CONFIG_NEED_BOUNCE_POOL)
static __init int init_emergency_pool(void)
{
#if defined(CONFIG_HIGHMEM) && !defined(CONFIG_MEMORY_HOTPLUG)
	if (max_pfn <= max_low_pfn)
		return 0;
#endif

	page_pool = mempool_create_page_pool(POOL_SIZE, 0);
	BUG_ON(!page_pool);
	printk("bounce pool size: %d pages\n", POOL_SIZE);

	return 0;
}

__initcall(init_emergency_pool);
#endif

#ifdef CONFIG_HIGHMEM
/*
 * highmem version, map in to vec
 */
static void bounce_copy_vec(struct bio_vec *to, unsigned char *vfrom)
{
	unsigned long flags;
	unsigned char *vto;

	local_irq_save(flags);
	vto = kmap_atomic(to->bv_page);
	memcpy(vto + to->bv_offset, vfrom, to->bv_len);
	kunmap_atomic(vto);
	local_irq_restore(flags);
}

#else /* CONFIG_HIGHMEM */

#define bounce_copy_vec(to, vfrom)	\
	memcpy(page_address((to)->bv_page) + (to)->bv_offset, vfrom, (to)->bv_len)

#endif /* CONFIG_HIGHMEM */

/*
 * allocate pages in the DMA region for the ISA pool
 */
static void *mempool_alloc_pages_isa(gfp_t gfp_mask, void *data)
{
	return mempool_alloc_pages(gfp_mask | GFP_DMA, data);
}

/*
 * gets called "every" time someone init's a queue with BLK_BOUNCE_ISA
 * as the max address, so check if the pool has already been created.
 */
int init_emergency_isa_pool(void)
{
	if (isa_page_pool)
		return 0;

	isa_page_pool = mempool_create(ISA_POOL_SIZE, mempool_alloc_pages_isa,
				       mempool_free_pages, (void *) 0);
	BUG_ON(!isa_page_pool);

	printk("isa bounce pool size: %d pages\n", ISA_POOL_SIZE);
	return 0;
}

/*
 * Simple bounce buffer support for highmem pages. Depending on the
 * queue gfp mask set, *to may or may not be a highmem page. kmap it
 * always, it will do the Right Thing
 */
static void copy_to_high_bio_irq(struct bio *to, struct bio *from)
{
	unsigned char *vfrom;
	struct bio_vec *tovec, *fromvec;
	int i;

	bio_for_each_segment(tovec, to, i) {
		fromvec = from->bi_io_vec + i;

		/*
		 * not bounced
		 */
		if (tovec->bv_page == fromvec->bv_page)
			continue;

		/*
		 * fromvec->bv_offset and fromvec->bv_len might have been
		 * modified by the block layer, so use the original copy,
		 * bounce_copy_vec already uses tovec->bv_len
		 */
		vfrom = page_address(fromvec->bv_page) + tovec->bv_offset;

		bounce_copy_vec(tovec, vfrom);
		flush_dcache_page(tovec->bv_page);
	}
}

static void bounce_end_io(struct bio *bio, mempool_t *pool, int err)
{
	struct bio *bio_orig = bio->bi_private;
	struct bio_vec *bvec, *org_vec;
	int i;

	if (test_bit(BIO_EOPNOTSUPP, &bio->bi_flags))
		set_bit(BIO_EOPNOTSUPP, &bio_orig->bi_flags);

	/*
	 * free up bounce indirect pages used
	 */
	bio_for_each_segment_all(bvec, bio, i) {
		org_vec = bio_orig->bi_io_vec + i;
		if (bvec->bv_page == org_vec->bv_page)
			continue;

		dec_zone_page_state(bvec->bv_page, NR_BOUNCE);
		mempool_free(bvec->bv_page, pool);
	}

	bio_endio(bio_orig, err);
	bio_put(bio);
}

static void bounce_end_io_write(struct bio *bio, int err)
{
	bounce_end_io(bio, page_pool, err);
}

static void bounce_end_io_write_isa(struct bio *bio, int err)
{

	bounce_end_io(bio, isa_page_pool, err);
}

static void __bounce_end_io_read(struct bio *bio, mempool_t *pool, int err)
{
	struct bio *bio_orig = bio->bi_private;

	if (test_bit(BIO_UPTODATE, &bio->bi_flags))
		copy_to_high_bio_irq(bio_orig, bio);

	bounce_end_io(bio, pool, err);
}

static void bounce_end_io_read(struct bio *bio, int err)
{
	__bounce_end_io_read(bio, page_pool, err);
}

static void bounce_end_io_read_isa(struct bio *bio, int err)
{
	__bounce_end_io_read(bio, isa_page_pool, err);
}

#ifdef CONFIG_NEED_BOUNCE_POOL
static int must_snapshot_stable_pages(struct request_queue *q, struct bio *bio)
{
	if (bio_data_dir(bio) != WRITE)
		return 0;

	if (!bdi_cap_stable_pages_required(&q->backing_dev_info))
		return 0;

	return test_bit(BIO_SNAP_STABLE, &bio->bi_flags);
}
#else
static int must_snapshot_stable_pages(struct request_queue *q, struct bio *bio)
{
	return 0;
}
#endif /* CONFIG_NEED_BOUNCE_POOL */

static void __blk_queue_bounce(struct request_queue *q, struct bio **bio_orig,
			       mempool_t *pool, int force)
{
	struct bio *bio;
	int rw = bio_data_dir(*bio_orig);
	struct bio_vec *to, *from;
	unsigned i;

	if (force)
		goto bounce;
	bio_for_each_segment(from, *bio_orig, i)
		if (page_to_pfn(from->bv_page) > queue_bounce_pfn(q))
			goto bounce;

	return;
bounce:
	bio = bio_clone_bioset(*bio_orig, GFP_NOIO, fs_bio_set);

	bio_for_each_segment_all(to, bio, i) {
		struct page *page = to->bv_page;

		if (page_to_pfn(page) <= queue_bounce_pfn(q) && !force)
			continue;

		inc_zone_page_state(to->bv_page, NR_BOUNCE);
		to->bv_page = mempool_alloc(pool, q->bounce_gfp);

		if (rw == WRITE) {
			char *vto, *vfrom;

			flush_dcache_page(page);

			vto = page_address(to->bv_page) + to->bv_offset;
			vfrom = kmap_atomic(page) + to->bv_offset;
			memcpy(vto, vfrom, to->bv_len);
			kunmap_atomic(vfrom);
		}
	}

	trace_block_bio_bounce(q, *bio_orig);

	bio->bi_flags |= (1 << BIO_BOUNCED);

	if (pool == page_pool) {
		bio->bi_end_io = bounce_end_io_write;
		if (rw == READ)
			bio->bi_end_io = bounce_end_io_read;
	} else {
		bio->bi_end_io = bounce_end_io_write_isa;
		if (rw == READ)
			bio->bi_end_io = bounce_end_io_read_isa;
	}

	bio->bi_private = *bio_orig;
	*bio_orig = bio;
}

void blk_queue_bounce(struct request_queue *q, struct bio **bio_orig)
{
	int must_bounce;
	mempool_t *pool;

	/*
	 * Data-less bio, nothing to bounce
	 */
	if (!bio_has_data(*bio_orig))
		return;

	must_bounce = must_snapshot_stable_pages(q, *bio_orig);

	/*
	 * for non-isa bounce case, just check if the bounce pfn is equal
	 * to or bigger than the highest pfn in the system -- in that case,
	 * don't waste time iterating over bio segments
	 */
	if (!(q->bounce_gfp & GFP_DMA)) {
		if (queue_bounce_pfn(q) >= blk_max_pfn && !must_bounce)
			return;
		pool = page_pool;
	} else {
		BUG_ON(!isa_page_pool);
		pool = isa_page_pool;
	}

	/*
	 * slow path
	 */
	__blk_queue_bounce(q, bio_orig, pool, must_bounce);
}

EXPORT_SYMBOL(blk_queue_bounce);