journal.c (6ea24cf79e055f0a62a64baa8587e2254a493c7b) journal.c (f2db19719a4e789a58ac024b43f12eeb9e458074)
1/*
2 * linux/fs/jbd2/journal.c
3 *
4 * Written by Stephen C. Tweedie <sct@redhat.com>, 1998
5 *
6 * Copyright 1998 Red Hat corp --- All Rights Reserved
7 *
8 * This file is part of the Linux kernel and is made available under

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89EXPORT_SYMBOL(jbd2_log_start_commit);
90EXPORT_SYMBOL(jbd2_journal_start_commit);
91EXPORT_SYMBOL(jbd2_journal_force_commit_nested);
92EXPORT_SYMBOL(jbd2_journal_wipe);
93EXPORT_SYMBOL(jbd2_journal_blocks_per_page);
94EXPORT_SYMBOL(jbd2_journal_invalidatepage);
95EXPORT_SYMBOL(jbd2_journal_try_to_free_buffers);
96EXPORT_SYMBOL(jbd2_journal_force_commit);
1/*
2 * linux/fs/jbd2/journal.c
3 *
4 * Written by Stephen C. Tweedie <sct@redhat.com>, 1998
5 *
6 * Copyright 1998 Red Hat corp --- All Rights Reserved
7 *
8 * This file is part of the Linux kernel and is made available under

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89EXPORT_SYMBOL(jbd2_log_start_commit);
90EXPORT_SYMBOL(jbd2_journal_start_commit);
91EXPORT_SYMBOL(jbd2_journal_force_commit_nested);
92EXPORT_SYMBOL(jbd2_journal_wipe);
93EXPORT_SYMBOL(jbd2_journal_blocks_per_page);
94EXPORT_SYMBOL(jbd2_journal_invalidatepage);
95EXPORT_SYMBOL(jbd2_journal_try_to_free_buffers);
96EXPORT_SYMBOL(jbd2_journal_force_commit);
97EXPORT_SYMBOL(jbd2_journal_file_inode);
97EXPORT_SYMBOL(jbd2_journal_inode_add_write);
98EXPORT_SYMBOL(jbd2_journal_inode_add_wait);
98EXPORT_SYMBOL(jbd2_journal_init_jbd_inode);
99EXPORT_SYMBOL(jbd2_journal_release_jbd_inode);
100EXPORT_SYMBOL(jbd2_journal_begin_ordered_truncate);
101EXPORT_SYMBOL(jbd2_inode_cache);
102
103static void __journal_abort_soft (journal_t *journal, int errno);
104static int jbd2_journal_create_slab(size_t slab_size);
105

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2323}
2324
2325void *jbd2_alloc(size_t size, gfp_t flags)
2326{
2327 void *ptr;
2328
2329 BUG_ON(size & (size-1)); /* Must be a power of 2 */
2330
99EXPORT_SYMBOL(jbd2_journal_init_jbd_inode);
100EXPORT_SYMBOL(jbd2_journal_release_jbd_inode);
101EXPORT_SYMBOL(jbd2_journal_begin_ordered_truncate);
102EXPORT_SYMBOL(jbd2_inode_cache);
103
104static void __journal_abort_soft (journal_t *journal, int errno);
105static int jbd2_journal_create_slab(size_t slab_size);
106

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2324}
2325
2326void *jbd2_alloc(size_t size, gfp_t flags)
2327{
2328 void *ptr;
2329
2330 BUG_ON(size & (size-1)); /* Must be a power of 2 */
2331
2331 flags |= __GFP_REPEAT;
2332 if (size == PAGE_SIZE)
2333 ptr = (void *)__get_free_pages(flags, 0);
2334 else if (size > PAGE_SIZE) {
2335 int order = get_order(size);
2336
2337 if (order < 3)
2338 ptr = (void *)__get_free_pages(flags, order);
2339 else
2340 ptr = vmalloc(size);
2341 } else
2332 if (size < PAGE_SIZE)
2342 ptr = kmem_cache_alloc(get_slab(size), flags);
2333 ptr = kmem_cache_alloc(get_slab(size), flags);
2334 else
2335 ptr = (void *)__get_free_pages(flags, get_order(size));
2343
2344 /* Check alignment; SLUB has gotten this wrong in the past,
2345 * and this can lead to user data corruption! */
2346 BUG_ON(((unsigned long) ptr) & (size-1));
2347
2348 return ptr;
2349}
2350
2351void jbd2_free(void *ptr, size_t size)
2352{
2336
2337 /* Check alignment; SLUB has gotten this wrong in the past,
2338 * and this can lead to user data corruption! */
2339 BUG_ON(((unsigned long) ptr) & (size-1));
2340
2341 return ptr;
2342}
2343
2344void jbd2_free(void *ptr, size_t size)
2345{
2353 if (size == PAGE_SIZE) {
2354 free_pages((unsigned long)ptr, 0);
2355 return;
2356 }
2357 if (size > PAGE_SIZE) {
2358 int order = get_order(size);
2359
2360 if (order < 3)
2361 free_pages((unsigned long)ptr, order);
2362 else
2363 vfree(ptr);
2364 return;
2365 }
2366 kmem_cache_free(get_slab(size), ptr);
2346 if (size < PAGE_SIZE)
2347 kmem_cache_free(get_slab(size), ptr);
2348 else
2349 free_pages((unsigned long)ptr, get_order(size));
2367};
2368
2369/*
2370 * Journal_head storage management
2371 */
2372static struct kmem_cache *jbd2_journal_head_cache;
2373#ifdef CONFIG_JBD2_DEBUG
2374static atomic_t nr_journal_heads = ATOMIC_INIT(0);

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2351
2352/*
2353 * Journal_head storage management
2354 */
2355static struct kmem_cache *jbd2_journal_head_cache;
2356#ifdef CONFIG_JBD2_DEBUG
2357static atomic_t nr_journal_heads = ATOMIC_INIT(0);

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