xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
포크 0
코드 이슈 풀 리퀘스트 Actions Packages Projects 릴리즈 위키 활동

[JFFS2] Reduce visibility of raw_node_ref to upper layers of JFFS2 code.

소스 검색 
As the first step towards eliminating the ref->next_phys member and saving
memory by using an _array_ of struct jffs2_raw_node_ref per eraseblock,
stop the write functions from allocating their own refs; have them just
_reserve_ the appropriate number instead. Then jffs2_link_node_ref() can
just fill them in.

Use a linked list of pre-allocated refs in the superblock, for now. Once
we switch to an array, it'll just be a case of extending that array.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
This commit is contained in:
David Woodhouse
2006-05-24 02:04:45 +01:00
부모 4cbb9b80e1
커밋 2f785402f3
12개의 변경된 파일과 205개의 추가작업 그리고 350개의 파일을 삭제
Download Patch File Download Diff File Expand all files Collapse all files

77
fs/jffs2/scan.c
파일 보기

@@ -317,7 +317,6 @@ static int jffs2_scan_xattr_node(struct jffs2_sb_info *c, struct jffs2_erasebloc
struct jffs2_summary *s)
{
struct jffs2_xattr_datum *xd;
struct jffs2_raw_node_ref *raw;
uint32_t totlen, crc;
int err;
@@ -340,13 +339,8 @@ static int jffs2_scan_xattr_node(struct jffs2_sb_info *c, struct jffs2_erasebloc
return 0;
}
raw = jffs2_alloc_raw_node_ref();
if (!raw)
return -ENOMEM;
xd = jffs2_setup_xattr_datum(c, je32_to_cpu(rx->xid), je32_to_cpu(rx->version));
if (IS_ERR(xd)) {
jffs2_free_raw_node_ref(raw);
if (PTR_ERR(xd) == -EEXIST) {
if ((err = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(rx->totlen)))))
return err;
@@ -358,12 +352,9 @@ static int jffs2_scan_xattr_node(struct jffs2_sb_info *c, struct jffs2_erasebloc
xd->name_len = rx->name_len;
xd->value_len = je16_to_cpu(rx->value_len);
xd->data_crc = je32_to_cpu(rx->data_crc);
xd->node = raw;
raw->flash_offset = ofs | REF_PRISTINE;
jffs2_link_node_ref(c, jeb, raw, totlen, NULL);
/* FIXME */ raw->next_in_ino = (void *)xd;
xd->node = jffs2_link_node_ref(c, jeb, ofs | REF_PRISTINE, totlen, NULL);
/* FIXME */ xd->node->next_in_ino = (void *)xd;
if (jffs2_sum_active())
jffs2_sum_add_xattr_mem(s, rx, ofs - jeb->offset);
@@ -377,7 +368,6 @@ static int jffs2_scan_xref_node(struct jffs2_sb_info *c, struct jffs2_eraseblock
struct jffs2_summary *s)
{
struct jffs2_xattr_ref *ref;
struct jffs2_raw_node_ref *raw;
uint32_t crc;
int err;
@@ -404,12 +394,6 @@ static int jffs2_scan_xref_node(struct jffs2_sb_info *c, struct jffs2_eraseblock
if (!ref)
return -ENOMEM;
raw = jffs2_alloc_raw_node_ref();
if (!raw) {
jffs2_free_xattr_ref(ref);
return -ENOMEM;
}
/* BEFORE jffs2_build_xattr_subsystem() called,
* ref->xid is used to store 32bit xid, xd is not used
* ref->ino is used to store 32bit inode-number, ic is not used
@@ -418,16 +402,13 @@ static int jffs2_scan_xref_node(struct jffs2_sb_info *c, struct jffs2_eraseblock
* used to chain all xattr_ref object. It's re-chained to
* jffs2_inode_cache in jffs2_build_xattr_subsystem() correctly.
*/
ref->node = raw;
ref->ino = je32_to_cpu(rr->ino);
ref->xid = je32_to_cpu(rr->xid);
ref->next = c->xref_temp;
c->xref_temp = ref;
raw->flash_offset = ofs | REF_PRISTINE;
jffs2_link_node_ref(c, jeb, raw, PAD(je32_to_cpu(rr->totlen)), NULL);
/* FIXME */ raw->next_in_ino = (void *)ref;
ref->node = jffs2_link_node_ref(c, jeb, ofs | REF_PRISTINE, PAD(je32_to_cpu(rr->totlen)), NULL);
/* FIXME */ ref->node->next_in_ino = (void *)ref;
if (jffs2_sum_active())
jffs2_sum_add_xref_mem(s, rr, ofs - jeb->offset);
@@ -597,6 +578,11 @@ scan_more:
jffs2_dbg_acct_paranoia_check_nolock(c, jeb);
/* Make sure there are node refs available for use */
err = jffs2_prealloc_raw_node_refs(c, 2);
if (err)
return err;
cond_resched();
if (ofs & 3) {
@@ -839,14 +825,7 @@ scan_more:
return err;
ofs += PAD(sizeof(struct jffs2_unknown_node));
} else {
struct jffs2_raw_node_ref *marker_ref = jffs2_alloc_raw_node_ref();
if (!marker_ref) {
printk(KERN_NOTICE "Failed to allocate node ref for clean marker\n");
return -ENOMEM;
}
marker_ref->flash_offset = ofs | REF_NORMAL;
jffs2_link_node_ref(c, jeb, marker_ref, c->cleanmarker_size, NULL);
jffs2_link_node_ref(c, jeb, ofs | REF_NORMAL, c->cleanmarker_size, NULL);
ofs += PAD(c->cleanmarker_size);
}
@@ -884,14 +863,9 @@ scan_more:
break;
case JFFS2_FEATURE_RWCOMPAT_COPY: {
struct jffs2_raw_node_ref *ref;
D1(printk(KERN_NOTICE "Unknown but compatible feature node (0x%04x) found at offset 0x%08x\n", je16_to_cpu(node->nodetype), ofs));
ref = jffs2_alloc_raw_node_ref();
if (!ref)
return -ENOMEM;
ref->flash_offset = ofs | REF_PRISTINE;
jffs2_link_node_ref(c, jeb, ref, PAD(je32_to_cpu(node->totlen)), NULL);
jffs2_link_node_ref(c, jeb, ofs | REF_PRISTINE, PAD(je32_to_cpu(node->totlen)), NULL);
/* We can't summarise nodes we don't grok */
jffs2_sum_disable_collecting(s);
@@ -953,7 +927,6 @@ struct jffs2_inode_cache *jffs2_scan_make_ino_cache(struct jffs2_sb_info *c, uin
static int jffs2_scan_inode_node(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
struct jffs2_raw_inode *ri, uint32_t ofs, struct jffs2_summary *s)
{
struct jffs2_raw_node_ref *raw;
struct jffs2_inode_cache *ic;
uint32_t ino = je32_to_cpu(ri->ino);
int err;
@@ -969,12 +942,6 @@ static int jffs2_scan_inode_node(struct jffs2_sb_info *c, struct jffs2_erasebloc
Which means that the _full_ amount of time to get to proper write mode with GC
operational may actually be _longer_ than before. Sucks to be me. */
raw = jffs2_alloc_raw_node_ref();
if (!raw) {
printk(KERN_NOTICE "jffs2_scan_inode_node(): allocation of node reference failed\n");
return -ENOMEM;
}
ic = jffs2_get_ino_cache(c, ino);
if (!ic) {
/* Inocache get failed. Either we read a bogus ino# or it's just genuinely the
@@ -988,21 +955,15 @@ static int jffs2_scan_inode_node(struct jffs2_sb_info *c, struct jffs2_erasebloc
/* We believe totlen because the CRC on the node _header_ was OK, just the node itself failed. */
if ((err = jffs2_scan_dirty_space(c, jeb, PAD(je32_to_cpu(ri->totlen)))))
return err;
jffs2_free_raw_node_ref(raw);
return 0;
}
ic = jffs2_scan_make_ino_cache(c, ino);
if (!ic) {
jffs2_free_raw_node_ref(raw);
if (!ic)
return -ENOMEM;
}
}
/* Wheee. It worked */
raw->flash_offset = ofs | REF_UNCHECKED;
jffs2_link_node_ref(c, jeb, raw, PAD(je32_to_cpu(ri->totlen)), ic);
jffs2_link_node_ref(c, jeb, ofs | REF_UNCHECKED, PAD(je32_to_cpu(ri->totlen)), ic);
D1(printk(KERN_DEBUG "Node is ino #%u, version %d. Range 0x%x-0x%x\n",
je32_to_cpu(ri->ino), je32_to_cpu(ri->version),
@@ -1021,7 +982,6 @@ static int jffs2_scan_inode_node(struct jffs2_sb_info *c, struct jffs2_erasebloc
static int jffs2_scan_dirent_node(struct jffs2_sb_info *c, struct jffs2_eraseblock *jeb,
struct jffs2_raw_dirent *rd, uint32_t ofs, struct jffs2_summary *s)
{
struct jffs2_raw_node_ref *raw;
struct jffs2_full_dirent *fd;
struct jffs2_inode_cache *ic;
uint32_t crc;
@@ -1063,23 +1023,14 @@ static int jffs2_scan_dirent_node(struct jffs2_sb_info *c, struct jffs2_eraseblo
return err;
return 0;
}
raw = jffs2_alloc_raw_node_ref();
if (!raw) {
jffs2_free_full_dirent(fd);
printk(KERN_NOTICE "jffs2_scan_dirent_node(): allocation of node reference failed\n");
return -ENOMEM;
}
ic = jffs2_scan_make_ino_cache(c, je32_to_cpu(rd->pino));
if (!ic) {
jffs2_free_full_dirent(fd);
jffs2_free_raw_node_ref(raw);
return -ENOMEM;
}
raw->flash_offset = ofs | REF_PRISTINE;
jffs2_link_node_ref(c, jeb, raw, PAD(je32_to_cpu(rd->totlen)), ic);
fd->raw = jffs2_link_node_ref(c, jeb, ofs | REF_PRISTINE, PAD(je32_to_cpu(rd->totlen)), ic);
fd->raw = raw;
fd->next = NULL;
fd->version = je32_to_cpu(rd->version);
fd->ino = je32_to_cpu(rd->ino);