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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:49:45 +0000 |
commit | 2c3c1048746a4622d8c89a29670120dc8fab93c4 (patch) | |
tree | 848558de17fb3008cdf4d861b01ac7781903ce39 /fs/jffs2/malloc.c | |
parent | Initial commit. (diff) | |
download | linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.tar.xz linux-2c3c1048746a4622d8c89a29670120dc8fab93c4.zip |
Adding upstream version 6.1.76.upstream/6.1.76
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'fs/jffs2/malloc.c')
-rw-r--r-- | fs/jffs2/malloc.c | 315 |
1 files changed, 315 insertions, 0 deletions
diff --git a/fs/jffs2/malloc.c b/fs/jffs2/malloc.c new file mode 100644 index 000000000..ce1189793 --- /dev/null +++ b/fs/jffs2/malloc.c @@ -0,0 +1,315 @@ +/* + * JFFS2 -- Journalling Flash File System, Version 2. + * + * Copyright © 2001-2007 Red Hat, Inc. + * + * Created by David Woodhouse <dwmw2@infradead.org> + * + * For licensing information, see the file 'LICENCE' in this directory. + * + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include <linux/kernel.h> +#include <linux/slab.h> +#include <linux/init.h> +#include <linux/jffs2.h> +#include "nodelist.h" + +/* These are initialised to NULL in the kernel startup code. + If you're porting to other operating systems, beware */ +static struct kmem_cache *full_dnode_slab; +static struct kmem_cache *raw_dirent_slab; +static struct kmem_cache *raw_inode_slab; +static struct kmem_cache *tmp_dnode_info_slab; +static struct kmem_cache *raw_node_ref_slab; +static struct kmem_cache *node_frag_slab; +static struct kmem_cache *inode_cache_slab; +#ifdef CONFIG_JFFS2_FS_XATTR +static struct kmem_cache *xattr_datum_cache; +static struct kmem_cache *xattr_ref_cache; +#endif + +int __init jffs2_create_slab_caches(void) +{ + full_dnode_slab = kmem_cache_create("jffs2_full_dnode", + sizeof(struct jffs2_full_dnode), + 0, 0, NULL); + if (!full_dnode_slab) + goto err; + + raw_dirent_slab = kmem_cache_create("jffs2_raw_dirent", + sizeof(struct jffs2_raw_dirent), + 0, SLAB_HWCACHE_ALIGN, NULL); + if (!raw_dirent_slab) + goto err; + + raw_inode_slab = kmem_cache_create("jffs2_raw_inode", + sizeof(struct jffs2_raw_inode), + 0, SLAB_HWCACHE_ALIGN, NULL); + if (!raw_inode_slab) + goto err; + + tmp_dnode_info_slab = kmem_cache_create("jffs2_tmp_dnode", + sizeof(struct jffs2_tmp_dnode_info), + 0, 0, NULL); + if (!tmp_dnode_info_slab) + goto err; + + raw_node_ref_slab = kmem_cache_create("jffs2_refblock", + sizeof(struct jffs2_raw_node_ref) * (REFS_PER_BLOCK + 1), + 0, 0, NULL); + if (!raw_node_ref_slab) + goto err; + + node_frag_slab = kmem_cache_create("jffs2_node_frag", + sizeof(struct jffs2_node_frag), + 0, 0, NULL); + if (!node_frag_slab) + goto err; + + inode_cache_slab = kmem_cache_create("jffs2_inode_cache", + sizeof(struct jffs2_inode_cache), + 0, 0, NULL); + if (!inode_cache_slab) + goto err; + +#ifdef CONFIG_JFFS2_FS_XATTR + xattr_datum_cache = kmem_cache_create("jffs2_xattr_datum", + sizeof(struct jffs2_xattr_datum), + 0, 0, NULL); + if (!xattr_datum_cache) + goto err; + + xattr_ref_cache = kmem_cache_create("jffs2_xattr_ref", + sizeof(struct jffs2_xattr_ref), + 0, 0, NULL); + if (!xattr_ref_cache) + goto err; +#endif + + return 0; + err: + jffs2_destroy_slab_caches(); + return -ENOMEM; +} + +void jffs2_destroy_slab_caches(void) +{ + kmem_cache_destroy(full_dnode_slab); + kmem_cache_destroy(raw_dirent_slab); + kmem_cache_destroy(raw_inode_slab); + kmem_cache_destroy(tmp_dnode_info_slab); + kmem_cache_destroy(raw_node_ref_slab); + kmem_cache_destroy(node_frag_slab); + kmem_cache_destroy(inode_cache_slab); +#ifdef CONFIG_JFFS2_FS_XATTR + kmem_cache_destroy(xattr_datum_cache); + kmem_cache_destroy(xattr_ref_cache); +#endif +} + +struct jffs2_full_dirent *jffs2_alloc_full_dirent(int namesize) +{ + struct jffs2_full_dirent *ret; + ret = kmalloc(sizeof(struct jffs2_full_dirent) + namesize, GFP_KERNEL); + dbg_memalloc("%p\n", ret); + return ret; +} + +void jffs2_free_full_dirent(struct jffs2_full_dirent *x) +{ + dbg_memalloc("%p\n", x); + kfree(x); +} + +struct jffs2_full_dnode *jffs2_alloc_full_dnode(void) +{ + struct jffs2_full_dnode *ret; + ret = kmem_cache_alloc(full_dnode_slab, GFP_KERNEL); + dbg_memalloc("%p\n", ret); + return ret; +} + +void jffs2_free_full_dnode(struct jffs2_full_dnode *x) +{ + dbg_memalloc("%p\n", x); + kmem_cache_free(full_dnode_slab, x); +} + +struct jffs2_raw_dirent *jffs2_alloc_raw_dirent(void) +{ + struct jffs2_raw_dirent *ret; + ret = kmem_cache_alloc(raw_dirent_slab, GFP_KERNEL); + dbg_memalloc("%p\n", ret); + return ret; +} + +void jffs2_free_raw_dirent(struct jffs2_raw_dirent *x) +{ + dbg_memalloc("%p\n", x); + kmem_cache_free(raw_dirent_slab, x); +} + +struct jffs2_raw_inode *jffs2_alloc_raw_inode(void) +{ + struct jffs2_raw_inode *ret; + ret = kmem_cache_alloc(raw_inode_slab, GFP_KERNEL); + dbg_memalloc("%p\n", ret); + return ret; +} + +void jffs2_free_raw_inode(struct jffs2_raw_inode *x) +{ + dbg_memalloc("%p\n", x); + kmem_cache_free(raw_inode_slab, x); +} + +struct jffs2_tmp_dnode_info *jffs2_alloc_tmp_dnode_info(void) +{ + struct jffs2_tmp_dnode_info *ret; + ret = kmem_cache_alloc(tmp_dnode_info_slab, GFP_KERNEL); + dbg_memalloc("%p\n", + ret); + return ret; +} + +void jffs2_free_tmp_dnode_info(struct jffs2_tmp_dnode_info *x) +{ + dbg_memalloc("%p\n", x); + kmem_cache_free(tmp_dnode_info_slab, x); +} + +static struct jffs2_raw_node_ref *jffs2_alloc_refblock(void) +{ + struct jffs2_raw_node_ref *ret; + + ret = kmem_cache_alloc(raw_node_ref_slab, GFP_KERNEL); + if (ret) { + int i = 0; + for (i=0; i < REFS_PER_BLOCK; i++) { + ret[i].flash_offset = REF_EMPTY_NODE; + ret[i].next_in_ino = NULL; + } + ret[i].flash_offset = REF_LINK_NODE; + ret[i].next_in_ino = NULL; + } + return ret; +} + +int jffs2_prealloc_raw_node_refs(struct jffs2_sb_info *c, + struct jffs2_eraseblock *jeb, int nr) +{ + struct jffs2_raw_node_ref **p, *ref; + int i = nr; + + dbg_memalloc("%d\n", nr); + + p = &jeb->last_node; + ref = *p; + + dbg_memalloc("Reserving %d refs for block @0x%08x\n", nr, jeb->offset); + + /* If jeb->last_node is really a valid node then skip over it */ + if (ref && ref->flash_offset != REF_EMPTY_NODE) + ref++; + + while (i) { + if (!ref) { + dbg_memalloc("Allocating new refblock linked from %p\n", p); + ref = *p = jffs2_alloc_refblock(); + if (!ref) + return -ENOMEM; + } + if (ref->flash_offset == REF_LINK_NODE) { + p = &ref->next_in_ino; + ref = *p; + continue; + } + i--; + ref++; + } + jeb->allocated_refs = nr; + + dbg_memalloc("Reserved %d refs for block @0x%08x, last_node is %p (%08x,%p)\n", + nr, jeb->offset, jeb->last_node, jeb->last_node->flash_offset, + jeb->last_node->next_in_ino); + + return 0; +} + +void jffs2_free_refblock(struct jffs2_raw_node_ref *x) +{ + dbg_memalloc("%p\n", x); + kmem_cache_free(raw_node_ref_slab, x); +} + +struct jffs2_node_frag *jffs2_alloc_node_frag(void) +{ + struct jffs2_node_frag *ret; + ret = kmem_cache_alloc(node_frag_slab, GFP_KERNEL); + dbg_memalloc("%p\n", ret); + return ret; +} + +void jffs2_free_node_frag(struct jffs2_node_frag *x) +{ + dbg_memalloc("%p\n", x); + kmem_cache_free(node_frag_slab, x); +} + +struct jffs2_inode_cache *jffs2_alloc_inode_cache(void) +{ + struct jffs2_inode_cache *ret; + ret = kmem_cache_alloc(inode_cache_slab, GFP_KERNEL); + dbg_memalloc("%p\n", ret); + return ret; +} + +void jffs2_free_inode_cache(struct jffs2_inode_cache *x) +{ + dbg_memalloc("%p\n", x); + kmem_cache_free(inode_cache_slab, x); +} + +#ifdef CONFIG_JFFS2_FS_XATTR +struct jffs2_xattr_datum *jffs2_alloc_xattr_datum(void) +{ + struct jffs2_xattr_datum *xd; + xd = kmem_cache_zalloc(xattr_datum_cache, GFP_KERNEL); + dbg_memalloc("%p\n", xd); + if (!xd) + return NULL; + + xd->class = RAWNODE_CLASS_XATTR_DATUM; + xd->node = (void *)xd; + INIT_LIST_HEAD(&xd->xindex); + return xd; +} + +void jffs2_free_xattr_datum(struct jffs2_xattr_datum *xd) +{ + dbg_memalloc("%p\n", xd); + kmem_cache_free(xattr_datum_cache, xd); +} + +struct jffs2_xattr_ref *jffs2_alloc_xattr_ref(void) +{ + struct jffs2_xattr_ref *ref; + ref = kmem_cache_zalloc(xattr_ref_cache, GFP_KERNEL); + dbg_memalloc("%p\n", ref); + if (!ref) + return NULL; + + ref->class = RAWNODE_CLASS_XATTR_REF; + ref->node = (void *)ref; + return ref; +} + +void jffs2_free_xattr_ref(struct jffs2_xattr_ref *ref) +{ + dbg_memalloc("%p\n", ref); + kmem_cache_free(xattr_ref_cache, ref); +} +#endif |