genesi/linux-legacy
1
0
Fork 0
mirror of https://github.com/genesi/linux-legacy.git synced 2026-05-20 11:44:14 +00:00
Code Issues Packages Projects Releases Wiki Activity

Merge branch 'linux-next' of git://git.infradead.org/ubifs-2.6

Browse Source 
* 'linux-next' of git://git.infradead.org/ubifs-2.6: (25 commits)
  UBIFS: fix ubifs_compress commentary
  UBIFS: amend printk
  UBIFS: do not read unnecessary bytes when unpacking bits
  UBIFS: check buffer length when scanning for LPT nodes
  UBIFS: correct condition to eliminate unecessary assignment
  UBIFS: add more debugging messages for LPT
  UBIFS: fix bulk-read handling uptodate pages
  UBIFS: improve garbage collection
  UBIFS: allow for sync_fs when read-only
  UBIFS: commit on sync_fs
  UBIFS: correct comment for commit_on_unmount
  UBIFS: update dbg_dump_inode
  UBIFS: fix commentary
  UBIFS: fix races in bit-fields
  UBIFS: ensure data read beyond i_size is zeroed out correctly
  UBIFS: correct key comparison
  UBIFS: use bit-fields when possible
  UBIFS: check data CRC when in error state
  UBIFS: improve znode splitting rules
  UBIFS: add no_chk_data_crc mount option
  ...
This commit is contained in:
Linus Torvalds
2008-10-20 09:19:03 -07:00
parent ed402af3c2 54779aabb0
commit 396b122f6a
21 changed files with 1187 additions and 167 deletions
Download Patch File Download Diff File Expand all files Collapse all files

26
fs/ubifs/budget.c
View File

@@ -414,19 +414,21 @@ static int do_budget_space(struct ubifs_info *c)
* @c->lst.empty_lebs + @c->freeable_cnt + @c->idx_gc_cnt -
* @c->lst.taken_empty_lebs
*
* @empty_lebs are available because they are empty. @freeable_cnt are
* available because they contain only free and dirty space and the
* index allocation always occurs after wbufs are synch'ed.
* @idx_gc_cnt are available because they are index LEBs that have been
* garbage collected (including trivial GC) and are awaiting the commit
* before they can be unmapped - note that the in-the-gaps method will
* grab these if it needs them. @taken_empty_lebs are empty_lebs that
* have already been allocated for some purpose (also includes those
* LEBs on the @idx_gc list).
* @c->lst.empty_lebs are available because they are empty.
* @c->freeable_cnt are available because they contain only free and
* dirty space, @c->idx_gc_cnt are available because they are index
* LEBs that have been garbage collected and are awaiting the commit
* before they can be used. And the in-the-gaps method will grab these
* if it needs them. @c->lst.taken_empty_lebs are empty LEBs that have
* already been allocated for some purpose.
*
* Note, @taken_empty_lebs may temporarily be higher by one because of
* the way we serialize LEB allocations and budgeting. See a comment in
* 'ubifs_find_free_space()'.
* Note, @c->idx_gc_cnt is included to both @c->lst.empty_lebs (because
* these LEBs are empty) and to @c->lst.taken_empty_lebs (because they
* are taken until after the commit).
*
* Note, @c->lst.taken_empty_lebs may temporarily be higher by one
* because of the way we serialize LEB allocations and budgeting. See a
* comment in 'ubifs_find_free_space()'.
*/
lebs = c->lst.empty_lebs + c->freeable_cnt + c->idx_gc_cnt -
c->lst.taken_empty_lebs;

2
fs/ubifs/compress.c
View File

@@ -91,8 +91,6 @@ struct ubifs_compressor *ubifs_compressors[UBIFS_COMPR_TYPES_CNT];
*
* Note, if the input buffer was not compressed, it is copied to the output
* buffer and %UBIFS_COMPR_NONE is returned in @compr_type.
*
* This functions returns %0 on success or a negative error code on failure.
*/
void ubifs_compress(const void *in_buf, int in_len, void *out_buf, int *out_len,
int *compr_type)

79
fs/ubifs/debug.c
View File

@@ -222,30 +222,38 @@ void dbg_dump_inode(const struct ubifs_info *c, const struct inode *inode)
{
const struct ubifs_inode *ui = ubifs_inode(inode);
printk(KERN_DEBUG "inode %lu\n", inode->i_ino);
printk(KERN_DEBUG "size %llu\n",
printk(KERN_DEBUG "Dump in-memory inode:");
printk(KERN_DEBUG "\tinode %lu\n", inode->i_ino);
printk(KERN_DEBUG "\tsize %llu\n",
(unsigned long long)i_size_read(inode));
printk(KERN_DEBUG "nlink %u\n", inode->i_nlink);
printk(KERN_DEBUG "uid %u\n", (unsigned int)inode->i_uid);
printk(KERN_DEBUG "gid %u\n", (unsigned int)inode->i_gid);
printk(KERN_DEBUG "atime %u.%u\n",
printk(KERN_DEBUG "\tnlink %u\n", inode->i_nlink);
printk(KERN_DEBUG "\tuid %u\n", (unsigned int)inode->i_uid);
printk(KERN_DEBUG "\tgid %u\n", (unsigned int)inode->i_gid);
printk(KERN_DEBUG "\tatime %u.%u\n",
(unsigned int)inode->i_atime.tv_sec,
(unsigned int)inode->i_atime.tv_nsec);
printk(KERN_DEBUG "mtime %u.%u\n",
printk(KERN_DEBUG "\tmtime %u.%u\n",
(unsigned int)inode->i_mtime.tv_sec,
(unsigned int)inode->i_mtime.tv_nsec);
printk(KERN_DEBUG "ctime %u.%u\n",
printk(KERN_DEBUG "\tctime %u.%u\n",
(unsigned int)inode->i_ctime.tv_sec,
(unsigned int)inode->i_ctime.tv_nsec);
printk(KERN_DEBUG "creat_sqnum %llu\n", ui->creat_sqnum);
printk(KERN_DEBUG "xattr_size %u\n", ui->xattr_size);
printk(KERN_DEBUG "xattr_cnt %u\n", ui->xattr_cnt);
printk(KERN_DEBUG "xattr_names %u\n", ui->xattr_names);
printk(KERN_DEBUG "dirty %u\n", ui->dirty);
printk(KERN_DEBUG "xattr %u\n", ui->xattr);
printk(KERN_DEBUG "flags %d\n", ui->flags);
printk(KERN_DEBUG "compr_type %d\n", ui->compr_type);
printk(KERN_DEBUG "data_len %d\n", ui->data_len);
printk(KERN_DEBUG "\tcreat_sqnum %llu\n", ui->creat_sqnum);
printk(KERN_DEBUG "\txattr_size %u\n", ui->xattr_size);
printk(KERN_DEBUG "\txattr_cnt %u\n", ui->xattr_cnt);
printk(KERN_DEBUG "\txattr_names %u\n", ui->xattr_names);
printk(KERN_DEBUG "\tdirty %u\n", ui->dirty);
printk(KERN_DEBUG "\txattr %u\n", ui->xattr);
printk(KERN_DEBUG "\tbulk_read %u\n", ui->xattr);
printk(KERN_DEBUG "\tsynced_i_size %llu\n",
(unsigned long long)ui->synced_i_size);
printk(KERN_DEBUG "\tui_size %llu\n",
(unsigned long long)ui->ui_size);
printk(KERN_DEBUG "\tflags %d\n", ui->flags);
printk(KERN_DEBUG "\tcompr_type %d\n", ui->compr_type);
printk(KERN_DEBUG "\tlast_page_read %lu\n", ui->last_page_read);
printk(KERN_DEBUG "\tread_in_a_row %lu\n", ui->read_in_a_row);
printk(KERN_DEBUG "\tdata_len %d\n", ui->data_len);
}
void dbg_dump_node(const struct ubifs_info *c, const void *node)
@@ -647,6 +655,43 @@ void dbg_dump_lprops(struct ubifs_info *c)
}
}
void dbg_dump_lpt_info(struct ubifs_info *c)
{
int i;
spin_lock(&dbg_lock);
printk(KERN_DEBUG "\tlpt_sz: %lld\n", c->lpt_sz);
printk(KERN_DEBUG "\tpnode_sz: %d\n", c->pnode_sz);
printk(KERN_DEBUG "\tnnode_sz: %d\n", c->nnode_sz);
printk(KERN_DEBUG "\tltab_sz: %d\n", c->ltab_sz);
printk(KERN_DEBUG "\tlsave_sz: %d\n", c->lsave_sz);
printk(KERN_DEBUG "\tbig_lpt: %d\n", c->big_lpt);
printk(KERN_DEBUG "\tlpt_hght: %d\n", c->lpt_hght);
printk(KERN_DEBUG "\tpnode_cnt: %d\n", c->pnode_cnt);
printk(KERN_DEBUG "\tnnode_cnt: %d\n", c->nnode_cnt);
printk(KERN_DEBUG "\tdirty_pn_cnt: %d\n", c->dirty_pn_cnt);
printk(KERN_DEBUG "\tdirty_nn_cnt: %d\n", c->dirty_nn_cnt);
printk(KERN_DEBUG "\tlsave_cnt: %d\n", c->lsave_cnt);
printk(KERN_DEBUG "\tspace_bits: %d\n", c->space_bits);
printk(KERN_DEBUG "\tlpt_lnum_bits: %d\n", c->lpt_lnum_bits);
printk(KERN_DEBUG "\tlpt_offs_bits: %d\n", c->lpt_offs_bits);
printk(KERN_DEBUG "\tlpt_spc_bits: %d\n", c->lpt_spc_bits);
printk(KERN_DEBUG "\tpcnt_bits: %d\n", c->pcnt_bits);
printk(KERN_DEBUG "\tlnum_bits: %d\n", c->lnum_bits);
printk(KERN_DEBUG "\tLPT root is at %d:%d\n", c->lpt_lnum, c->lpt_offs);
printk(KERN_DEBUG "\tLPT head is at %d:%d\n",
c->nhead_lnum, c->nhead_offs);
printk(KERN_DEBUG "\tLPT ltab is at %d:%d\n", c->ltab_lnum, c->ltab_offs);
if (c->big_lpt)
printk(KERN_DEBUG "\tLPT lsave is at %d:%d\n",
c->lsave_lnum, c->lsave_offs);
for (i = 0; i < c->lpt_lebs; i++)
printk(KERN_DEBUG "\tLPT LEB %d free %d dirty %d tgc %d "
"cmt %d\n", i + c->lpt_first, c->ltab[i].free,
c->ltab[i].dirty, c->ltab[i].tgc, c->ltab[i].cmt);
spin_unlock(&dbg_lock);
}
void dbg_dump_leb(const struct ubifs_info *c, int lnum)
{
struct ubifs_scan_leb *sleb;

6
fs/ubifs/debug.h
View File

@@ -224,6 +224,7 @@ void dbg_dump_lstats(const struct ubifs_lp_stats *lst);
void dbg_dump_budg(struct ubifs_info *c);
void dbg_dump_lprop(const struct ubifs_info *c, const struct ubifs_lprops *lp);
void dbg_dump_lprops(struct ubifs_info *c);
void dbg_dump_lpt_info(struct ubifs_info *c);
void dbg_dump_leb(const struct ubifs_info *c, int lnum);
void dbg_dump_znode(const struct ubifs_info *c,
const struct ubifs_znode *znode);
@@ -249,6 +250,8 @@ int dbg_old_index_check_init(struct ubifs_info *c, struct ubifs_zbranch *zroot);
int dbg_check_old_index(struct ubifs_info *c, struct ubifs_zbranch *zroot);
int dbg_check_cats(struct ubifs_info *c);
int dbg_check_ltab(struct ubifs_info *c);
int dbg_chk_lpt_free_spc(struct ubifs_info *c);
int dbg_chk_lpt_sz(struct ubifs_info *c, int action, int len);
int dbg_check_synced_i_size(struct inode *inode);
int dbg_check_dir_size(struct ubifs_info *c, const struct inode *dir);
int dbg_check_tnc(struct ubifs_info *c, int extra);
@@ -367,6 +370,7 @@ static inline int dbg_change(struct ubi_volume_desc *desc, int lnum,
#define dbg_dump_budg(c) ({})
#define dbg_dump_lprop(c, lp) ({})
#define dbg_dump_lprops(c) ({})
#define dbg_dump_lpt_info(c) ({})
#define dbg_dump_leb(c, lnum) ({})
#define dbg_dump_znode(c, znode) ({})
#define dbg_dump_heap(c, heap, cat) ({})
@@ -379,6 +383,8 @@ static inline int dbg_change(struct ubi_volume_desc *desc, int lnum,
#define dbg_check_old_index(c, zroot) 0
#define dbg_check_cats(c) 0
#define dbg_check_ltab(c) 0
#define dbg_chk_lpt_free_spc(c) 0
#define dbg_chk_lpt_sz(c, action, len) 0
#define dbg_check_synced_i_size(inode) 0
#define dbg_check_dir_size(c, dir) 0
#define dbg_check_tnc(c, x) 0

260
fs/ubifs/file.c
View File

@@ -147,6 +147,12 @@ static int do_readpage(struct page *page)
err = ret;
if (err != -ENOENT)
break;
} else if (block + 1 == beyond) {
int dlen = le32_to_cpu(dn->size);
int ilen = i_size & (UBIFS_BLOCK_SIZE - 1);
if (ilen && ilen < dlen)
memset(addr + ilen, 0, dlen - ilen);
}
}
if (++i >= UBIFS_BLOCKS_PER_PAGE)
@@ -577,8 +583,262 @@ out:
return copied;
}
/**
* populate_page - copy data nodes into a page for bulk-read.
* @c: UBIFS file-system description object
* @page: page
* @bu: bulk-read information
* @n: next zbranch slot
*
* This function returns %0 on success and a negative error code on failure.
*/
static int populate_page(struct ubifs_info *c, struct page *page,
struct bu_info *bu, int *n)
{
int i = 0, nn = *n, offs = bu->zbranch[0].offs, hole = 0, read = 0;
struct inode *inode = page->mapping->host;
loff_t i_size = i_size_read(inode);
unsigned int page_block;
void *addr, *zaddr;
pgoff_t end_index;
dbg_gen("ino %lu, pg %lu, i_size %lld, flags %#lx",
inode->i_ino, page->index, i_size, page->flags);
addr = zaddr = kmap(page);
end_index = (i_size - 1) >> PAGE_CACHE_SHIFT;
if (!i_size || page->index > end_index) {
hole = 1;
memset(addr, 0, PAGE_CACHE_SIZE);
goto out_hole;
}
page_block = page->index << UBIFS_BLOCKS_PER_PAGE_SHIFT;
while (1) {
int err, len, out_len, dlen;
if (nn >= bu->cnt) {
hole = 1;
memset(addr, 0, UBIFS_BLOCK_SIZE);
} else if (key_block(c, &bu->zbranch[nn].key) == page_block) {
struct ubifs_data_node *dn;
dn = bu->buf + (bu->zbranch[nn].offs - offs);
ubifs_assert(dn->ch.sqnum >
ubifs_inode(inode)->creat_sqnum);
len = le32_to_cpu(dn->size);
if (len <= 0 || len > UBIFS_BLOCK_SIZE)
goto out_err;
dlen = le32_to_cpu(dn->ch.len) - UBIFS_DATA_NODE_SZ;
out_len = UBIFS_BLOCK_SIZE;
err = ubifs_decompress(&dn->data, dlen, addr, &out_len,
le16_to_cpu(dn->compr_type));
if (err || len != out_len)
goto out_err;
if (len < UBIFS_BLOCK_SIZE)
memset(addr + len, 0, UBIFS_BLOCK_SIZE - len);
nn += 1;
read = (i << UBIFS_BLOCK_SHIFT) + len;
} else if (key_block(c, &bu->zbranch[nn].key) < page_block) {
nn += 1;
continue;
} else {
hole = 1;
memset(addr, 0, UBIFS_BLOCK_SIZE);
}
if (++i >= UBIFS_BLOCKS_PER_PAGE)
break;
addr += UBIFS_BLOCK_SIZE;
page_block += 1;
}
if (end_index == page->index) {
int len = i_size & (PAGE_CACHE_SIZE - 1);
if (len && len < read)
memset(zaddr + len, 0, read - len);
}
out_hole:
if (hole) {
SetPageChecked(page);
dbg_gen("hole");
}
SetPageUptodate(page);
ClearPageError(page);
flush_dcache_page(page);
kunmap(page);
*n = nn;
return 0;
out_err:
ClearPageUptodate(page);
SetPageError(page);
flush_dcache_page(page);
kunmap(page);
ubifs_err("bad data node (block %u, inode %lu)",
page_block, inode->i_ino);
return -EINVAL;
}
/**
* ubifs_do_bulk_read - do bulk-read.
* @c: UBIFS file-system description object
* @page1: first page
*
* This function returns %1 if the bulk-read is done, otherwise %0 is returned.
*/
static int ubifs_do_bulk_read(struct ubifs_info *c, struct page *page1)
{
pgoff_t offset = page1->index, end_index;
struct address_space *mapping = page1->mapping;
struct inode *inode = mapping->host;
struct ubifs_inode *ui = ubifs_inode(inode);
struct bu_info *bu;
int err, page_idx, page_cnt, ret = 0, n = 0;
loff_t isize;
bu = kmalloc(sizeof(struct bu_info), GFP_NOFS);
if (!bu)
return 0;
bu->buf_len = c->bulk_read_buf_size;
bu->buf = kmalloc(bu->buf_len, GFP_NOFS);
if (!bu->buf)
goto out_free;
data_key_init(c, &bu->key, inode->i_ino,
offset << UBIFS_BLOCKS_PER_PAGE_SHIFT);
err = ubifs_tnc_get_bu_keys(c, bu);
if (err)
goto out_warn;
if (bu->eof) {
/* Turn off bulk-read at the end of the file */
ui->read_in_a_row = 1;
ui->bulk_read = 0;
}
page_cnt = bu->blk_cnt >> UBIFS_BLOCKS_PER_PAGE_SHIFT;
if (!page_cnt) {
/*
* This happens when there are multiple blocks per page and the
* blocks for the first page we are looking for, are not
* together. If all the pages were like this, bulk-read would
* reduce performance, so we turn it off for a while.
*/
ui->read_in_a_row = 0;
ui->bulk_read = 0;
goto out_free;
}
if (bu->cnt) {
err = ubifs_tnc_bulk_read(c, bu);
if (err)
goto out_warn;
}
err = populate_page(c, page1, bu, &n);
if (err)
goto out_warn;
unlock_page(page1);
ret = 1;
isize = i_size_read(inode);
if (isize == 0)
goto out_free;
end_index = ((isize - 1) >> PAGE_CACHE_SHIFT);
for (page_idx = 1; page_idx < page_cnt; page_idx++) {
pgoff_t page_offset = offset + page_idx;
struct page *page;
if (page_offset > end_index)
break;
page = find_or_create_page(mapping, page_offset,
GFP_NOFS | __GFP_COLD);
if (!page)
break;
if (!PageUptodate(page))
err = populate_page(c, page, bu, &n);
unlock_page(page);
page_cache_release(page);
if (err)
break;
}
ui->last_page_read = offset + page_idx - 1;
out_free:
kfree(bu->buf);
kfree(bu);
return ret;
out_warn:
ubifs_warn("ignoring error %d and skipping bulk-read", err);
goto out_free;
}
/**
* ubifs_bulk_read - determine whether to bulk-read and, if so, do it.
* @page: page from which to start bulk-read.
*
* Some flash media are capable of reading sequentially at faster rates. UBIFS
* bulk-read facility is designed to take advantage of that, by reading in one
* go consecutive data nodes that are also located consecutively in the same
* LEB. This function returns %1 if a bulk-read is done and %0 otherwise.
*/
static int ubifs_bulk_read(struct page *page)
{
struct inode *inode = page->mapping->host;
struct ubifs_info *c = inode->i_sb->s_fs_info;
struct ubifs_inode *ui = ubifs_inode(inode);
pgoff_t index = page->index, last_page_read = ui->last_page_read;
int ret = 0;
ui->last_page_read = index;
if (!c->bulk_read)
return 0;
/*
* Bulk-read is protected by ui_mutex, but it is an optimization, so
* don't bother if we cannot lock the mutex.
*/
if (!mutex_trylock(&ui->ui_mutex))
return 0;
if (index != last_page_read + 1) {
/* Turn off bulk-read if we stop reading sequentially */
ui->read_in_a_row = 1;
if (ui->bulk_read)
ui->bulk_read = 0;
goto out_unlock;
}
if (!ui->bulk_read) {
ui->read_in_a_row += 1;
if (ui->read_in_a_row < 3)
goto out_unlock;
/* Three reads in a row, so switch on bulk-read */
ui->bulk_read = 1;
}
ret = ubifs_do_bulk_read(c, page);
out_unlock:
mutex_unlock(&ui->ui_mutex);
return ret;
}
static int ubifs_readpage(struct file *file, struct page *page)
{
if (ubifs_bulk_read(page))
return 0;
do_readpage(page);
unlock_page(page);
return 0;

4
fs/ubifs/find.c
View File

@@ -901,11 +901,11 @@ static int get_idx_gc_leb(struct ubifs_info *c)
* it is needed now for this commit.
*/
lp = ubifs_lpt_lookup_dirty(c, lnum);
if (unlikely(IS_ERR(lp)))
if (IS_ERR(lp))
return PTR_ERR(lp);
lp = ubifs_change_lp(c, lp, LPROPS_NC, LPROPS_NC,
lp->flags | LPROPS_INDEX, -1);
if (unlikely(IS_ERR(lp)))
if (IS_ERR(lp))
return PTR_ERR(lp);
dbg_find("LEB %d, dirty %d and free %d flags %#x",
lp->lnum, lp->dirty, lp->free, lp->flags);

90
fs/ubifs/gc.c
View File

@@ -95,6 +95,48 @@ static int switch_gc_head(struct ubifs_info *c)
return err;
}
/**
* joinup - bring data nodes for an inode together.
* @c: UBIFS file-system description object
* @sleb: describes scanned LEB
* @inum: inode number
* @blk: block number
* @data: list to which to add data nodes
*
* This function looks at the first few nodes in the scanned LEB @sleb and adds
* them to @data if they are data nodes from @inum and have a larger block
* number than @blk. This function returns %0 on success and a negative error
* code on failure.
*/
static int joinup(struct ubifs_info *c, struct ubifs_scan_leb *sleb, ino_t inum,
unsigned int blk, struct list_head *data)
{
int err, cnt = 6, lnum = sleb->lnum, offs;
struct ubifs_scan_node *snod, *tmp;
union ubifs_key *key;
list_for_each_entry_safe(snod, tmp, &sleb->nodes, list) {
key = &snod->key;
if (key_inum(c, key) == inum &&
key_type(c, key) == UBIFS_DATA_KEY &&
key_block(c, key) > blk) {
offs = snod->offs;
err = ubifs_tnc_has_node(c, key, 0, lnum, offs, 0);
if (err < 0)
return err;
list_del(&snod->list);
if (err) {
list_add_tail(&snod->list, data);
blk = key_block(c, key);
} else
kfree(snod);
cnt = 6;
} else if (--cnt == 0)
break;
}
return 0;
}
/**
* move_nodes - move nodes.
* @c: UBIFS file-system description object
@@ -116,16 +158,21 @@ static int switch_gc_head(struct ubifs_info *c)
static int move_nodes(struct ubifs_info *c, struct ubifs_scan_leb *sleb)
{
struct ubifs_scan_node *snod, *tmp;
struct list_head large, medium, small;
struct list_head data, large, medium, small;
struct ubifs_wbuf *wbuf = &c->jheads[GCHD].wbuf;
int avail, err, min = INT_MAX;
unsigned int blk = 0;
ino_t inum = 0;
INIT_LIST_HEAD(&data);
INIT_LIST_HEAD(&large);
INIT_LIST_HEAD(&medium);
INIT_LIST_HEAD(&small);
list_for_each_entry_safe(snod, tmp, &sleb->nodes, list) {
struct list_head *lst;
while (!list_empty(&sleb->nodes)) {
struct list_head *lst = sleb->nodes.next;
snod = list_entry(lst, struct ubifs_scan_node, list);
ubifs_assert(snod->type != UBIFS_IDX_NODE);
ubifs_assert(snod->type != UBIFS_REF_NODE);
@@ -136,7 +183,6 @@ static int move_nodes(struct ubifs_info *c, struct ubifs_scan_leb *sleb)
if (err < 0)
goto out;
lst = &snod->list;
list_del(lst);
if (!err) {
/* The node is obsolete, remove it from the list */
@@ -145,15 +191,30 @@ static int move_nodes(struct ubifs_info *c, struct ubifs_scan_leb *sleb)
}
/*
* Sort the list of nodes so that large nodes go first, and
* small nodes go last.
* Sort the list of nodes so that data nodes go first, large
* nodes go second, and small nodes go last.
*/
if (snod->len > MEDIUM_NODE_WM)
list_add(lst, &large);
if (key_type(c, &snod->key) == UBIFS_DATA_KEY) {
if (inum != key_inum(c, &snod->key)) {
if (inum) {
/*
* Try to move data nodes from the same
* inode together.
*/
err = joinup(c, sleb, inum, blk, &data);
if (err)
goto out;
}
inum = key_inum(c, &snod->key);
blk = key_block(c, &snod->key);
}
list_add_tail(lst, &data);
} else if (snod->len > MEDIUM_NODE_WM)
list_add_tail(lst, &large);
else if (snod->len > SMALL_NODE_WM)
list_add(lst, &medium);
list_add_tail(lst, &medium);
else
list_add(lst, &small);
list_add_tail(lst, &small);
/* And find the smallest node */
if (snod->len < min)
@@ -164,6 +225,7 @@ static int move_nodes(struct ubifs_info *c, struct ubifs_scan_leb *sleb)
* Join the tree lists so that we'd have one roughly sorted list
* ('large' will be the head of the joined list).
*/
list_splice(&data, &large);
list_splice(&medium, large.prev);
list_splice(&small, large.prev);
@@ -653,7 +715,7 @@ int ubifs_gc_start_commit(struct ubifs_info *c)
*/
while (1) {
lp = ubifs_fast_find_freeable(c);
if (unlikely(IS_ERR(lp))) {
if (IS_ERR(lp)) {
err = PTR_ERR(lp);
goto out;
}
@@ -665,7 +727,7 @@ int ubifs_gc_start_commit(struct ubifs_info *c)
if (err)
goto out;
lp = ubifs_change_lp(c, lp, c->leb_size, 0, lp->flags, 0);
if (unlikely(IS_ERR(lp))) {
if (IS_ERR(lp)) {
err = PTR_ERR(lp);
goto out;
}
@@ -680,7 +742,7 @@ int ubifs_gc_start_commit(struct ubifs_info *c)
/* Record index freeable LEBs for unmapping after commit */
while (1) {
lp = ubifs_fast_find_frdi_idx(c);
if (unlikely(IS_ERR(lp))) {
if (IS_ERR(lp)) {
err = PTR_ERR(lp);
goto out;
}
@@ -696,7 +758,7 @@ int ubifs_gc_start_commit(struct ubifs_info *c)
/* Don't release the LEB until after the next commit */
flags = (lp->flags | LPROPS_TAKEN) ^ LPROPS_INDEX;
lp = ubifs_change_lp(c, lp, c->leb_size, 0, flags, 1);
if (unlikely(IS_ERR(lp))) {
if (IS_ERR(lp)) {
err = PTR_ERR(lp);
kfree(idx_gc);
goto out;

12
fs/ubifs/io.c
View File

@@ -62,6 +62,7 @@ void ubifs_ro_mode(struct ubifs_info *c, int err)
{
if (!c->ro_media) {
c->ro_media = 1;
c->no_chk_data_crc = 0;
ubifs_warn("switched to read-only mode, error %d", err);
dbg_dump_stack();
}
@@ -74,6 +75,7 @@ void ubifs_ro_mode(struct ubifs_info *c, int err)
* @lnum: logical eraseblock number
* @offs: offset within the logical eraseblock
* @quiet: print no messages
* @chk_crc: indicates whether to always check the CRC
*
* This function checks node magic number and CRC checksum. This function also
* validates node length to prevent UBIFS from becoming crazy when an attacker
@@ -85,7 +87,7 @@ void ubifs_ro_mode(struct ubifs_info *c, int err)
* or magic.
*/
int ubifs_check_node(const struct ubifs_info *c, const void *buf, int lnum,
int offs, int quiet)
int offs, int quiet, int chk_crc)
{
int err = -EINVAL, type, node_len;
uint32_t crc, node_crc, magic;
@@ -121,6 +123,10 @@ int ubifs_check_node(const struct ubifs_info *c, const void *buf, int lnum,
node_len > c->ranges[type].max_len)
goto out_len;
if (!chk_crc && type == UBIFS_DATA_NODE && !c->always_chk_crc)
if (c->no_chk_data_crc)
return 0;
crc = crc32(UBIFS_CRC32_INIT, buf + 8, node_len - 8);
node_crc = le32_to_cpu(ch->crc);
if (crc != node_crc) {
@@ -722,7 +728,7 @@ int ubifs_read_node_wbuf(struct ubifs_wbuf *wbuf, void *buf, int type, int len,
goto out;
}
err = ubifs_check_node(c, buf, lnum, offs, 0);
err = ubifs_check_node(c, buf, lnum, offs, 0, 0);
if (err) {
ubifs_err("expected node type %d", type);
return err;
@@ -781,7 +787,7 @@ int ubifs_read_node(const struct ubifs_info *c, void *buf, int type, int len,
goto out;
}
err = ubifs_check_node(c, buf, lnum, offs, 0);
err = ubifs_check_node(c, buf, lnum, offs, 0, 0);
if (err) {
ubifs_err("expected node type %d", type);
return err;

22
fs/ubifs/key.h
View File

@@ -484,7 +484,7 @@ static inline void key_copy(const struct ubifs_info *c,
* @key2: the second key to compare
*
* This function compares 2 keys and returns %-1 if @key1 is less than
* @key2, 0 if the keys are equivalent and %1 if @key1 is greater than @key2.
* @key2, %0 if the keys are equivalent and %1 if @key1 is greater than @key2.
*/
static inline int keys_cmp(const struct ubifs_info *c,
const union ubifs_key *key1,
@@ -502,6 +502,26 @@ static inline int keys_cmp(const struct ubifs_info *c,
return 0;
}
/**
* keys_eq - determine if keys are equivalent.
* @c: UBIFS file-system description object
* @key1: the first key to compare
* @key2: the second key to compare
*
* This function compares 2 keys and returns %1 if @key1 is equal to @key2 and
* %0 if not.
*/
static inline int keys_eq(const struct ubifs_info *c,
const union ubifs_key *key1,
const union ubifs_key *key2)
{
if (key1->u32[0] != key2->u32[0])
return 0;
if (key1->u32[1] != key2->u32[1])
return 0;
return 1;
}
/**
* is_hash_key - is a key vulnerable to hash collisions.
* @c: UBIFS file-system description object

34
fs/ubifs/lprops.c
View File

@@ -125,6 +125,7 @@ static void adjust_lpt_heap(struct ubifs_info *c, struct ubifs_lpt_heap *heap,
}
}
}
/* Not greater than parent, so compare to children */
while (1) {
/* Compare to left child */
@@ -459,18 +460,6 @@ static void change_category(struct ubifs_info *c, struct ubifs_lprops *lprops)
}
}
/**
* ubifs_get_lprops - get reference to LEB properties.
* @c: the UBIFS file-system description object
*
* This function locks lprops. Lprops have to be unlocked by
* 'ubifs_release_lprops()'.
*/
void ubifs_get_lprops(struct ubifs_info *c)
{
mutex_lock(&c->lp_mutex);
}
/**
* calc_dark - calculate LEB dark space size.
* @c: the UBIFS file-system description object
@@ -576,7 +565,6 @@ const struct ubifs_lprops *ubifs_change_lp(struct ubifs_info *c,
ubifs_assert(!(lprops->free & 7) && !(lprops->dirty & 7));
spin_lock(&c->space_lock);
if ((lprops->flags & LPROPS_TAKEN) && lprops->free == c->leb_size)
c->lst.taken_empty_lebs -= 1;
@@ -637,30 +625,11 @@ const struct ubifs_lprops *ubifs_change_lp(struct ubifs_info *c,
c->lst.taken_empty_lebs += 1;
change_category(c, lprops);
c->idx_gc_cnt += idx_gc_cnt;
spin_unlock(&c->space_lock);
return lprops;
}
/**
* ubifs_release_lprops - release lprops lock.
* @c: the UBIFS file-system description object
*
* This function has to be called after each 'ubifs_get_lprops()' call to
* unlock lprops.
*/
void ubifs_release_lprops(struct ubifs_info *c)
{
ubifs_assert(mutex_is_locked(&c->lp_mutex));
ubifs_assert(c->lst.empty_lebs >= 0 &&
c->lst.empty_lebs <= c->main_lebs);
mutex_unlock(&c->lp_mutex);
}
/**
* ubifs_get_lp_stats - get lprops statistics.
* @c: UBIFS file-system description object
@@ -1262,7 +1231,6 @@ static int scan_check_cb(struct ubifs_info *c,
}
ubifs_scan_destroy(sleb);
return LPT_SCAN_CONTINUE;
out_print:

48
fs/ubifs/lpt.c
View File

@@ -109,7 +109,8 @@ static void do_calc_lpt_geom(struct ubifs_info *c)
c->lpt_sz = (long long)c->pnode_cnt * c->pnode_sz;
c->lpt_sz += (long long)c->nnode_cnt * c->nnode_sz;
c->lpt_sz += c->ltab_sz;
c->lpt_sz += c->lsave_sz;
if (c->big_lpt)
c->lpt_sz += c->lsave_sz;
/* Add wastage */
sz = c->lpt_sz;
@@ -287,25 +288,56 @@ uint32_t ubifs_unpack_bits(uint8_t **addr, int *pos, int nrbits)
const int k = 32 - nrbits;
uint8_t *p = *addr;
int b = *pos;
uint32_t val;
uint32_t uninitialized_var(val);
const int bytes = (nrbits + b + 7) >> 3;
ubifs_assert(nrbits > 0);
ubifs_assert(nrbits <= 32);
ubifs_assert(*pos >= 0);
ubifs_assert(*pos < 8);
if (b) {
val = p[1] | ((uint32_t)p[2] << 8) | ((uint32_t)p[3] << 16) |
((uint32_t)p[4] << 24);
switch (bytes) {
case 2:
val = p[1];
break;
case 3:
val = p[1] | ((uint32_t)p[2] << 8);
break;
case 4:
val = p[1] | ((uint32_t)p[2] << 8) |
((uint32_t)p[3] << 16);
break;
case 5:
val = p[1] | ((uint32_t)p[2] << 8) |
((uint32_t)p[3] << 16) |
((uint32_t)p[4] << 24);
}
val <<= (8 - b);
val |= *p >> b;
nrbits += b;
} else
val = p[0] | ((uint32_t)p[1] << 8) | ((uint32_t)p[2] << 16) |
((uint32_t)p[3] << 24);
} else {
switch (bytes) {
case 1:
val = p[0];
break;
case 2:
val = p[0] | ((uint32_t)p[1] << 8);
break;
case 3:
val = p[0] | ((uint32_t)p[1] << 8) |
((uint32_t)p[2] << 16);
break;
case 4:
val = p[0] | ((uint32_t)p[1] << 8) |
((uint32_t)p[2] << 16) |
((uint32_t)p[3] << 24);
break;
}
}
val <<= k;
val >>= k;
b = nrbits & 7;
p += nrbits / 8;
p += nrbits >> 3;
*addr = p;
*pos = b;
ubifs_assert((val >> nrbits) == 0 || nrbits - b == 32);

187
fs/ubifs/lpt_commit.c
View File

@@ -177,8 +177,6 @@ static int alloc_lpt_leb(struct ubifs_info *c, int *lnum)
return 0;
}
}
dbg_err("last LEB %d", *lnum);
dump_stack();
return -ENOSPC;
}
@@ -193,6 +191,9 @@ static int layout_cnodes(struct ubifs_info *c)
int lnum, offs, len, alen, done_lsave, done_ltab, err;
struct ubifs_cnode *cnode;
err = dbg_chk_lpt_sz(c, 0, 0);
if (err)
return err;
cnode = c->lpt_cnext;
if (!cnode)
return 0;
@@ -206,6 +207,7 @@ static int layout_cnodes(struct ubifs_info *c)
c->lsave_lnum = lnum;
c->lsave_offs = offs;
offs += c->lsave_sz;
dbg_chk_lpt_sz(c, 1, c->lsave_sz);
}
if (offs + c->ltab_sz <= c->leb_size) {
@@ -213,6 +215,7 @@ static int layout_cnodes(struct ubifs_info *c)
c->ltab_lnum = lnum;
c->ltab_offs = offs;
offs += c->ltab_sz;
dbg_chk_lpt_sz(c, 1, c->ltab_sz);
}
do {
@@ -226,9 +229,10 @@ static int layout_cnodes(struct ubifs_info *c)
while (offs + len > c->leb_size) {
alen = ALIGN(offs, c->min_io_size);
upd_ltab(c, lnum, c->leb_size - alen, alen - offs);
dbg_chk_lpt_sz(c, 2, alen - offs);
err = alloc_lpt_leb(c, &lnum);
if (err)
return err;
goto no_space;
offs = 0;
ubifs_assert(lnum >= c->lpt_first &&
lnum <= c->lpt_last);
@@ -238,6 +242,7 @@ static int layout_cnodes(struct ubifs_info *c)
c->lsave_lnum = lnum;
c->lsave_offs = offs;
offs += c->lsave_sz;
dbg_chk_lpt_sz(c, 1, c->lsave_sz);
continue;
}
if (!done_ltab) {
@@ -245,6 +250,7 @@ static int layout_cnodes(struct ubifs_info *c)
c->ltab_lnum = lnum;
c->ltab_offs = offs;
offs += c->ltab_sz;
dbg_chk_lpt_sz(c, 1, c->ltab_sz);
continue;
}
break;
@@ -257,6 +263,7 @@ static int layout_cnodes(struct ubifs_info *c)
c->lpt_offs = offs;
}
offs += len;
dbg_chk_lpt_sz(c, 1, len);
cnode = cnode->cnext;
} while (cnode && cnode != c->lpt_cnext);
@@ -265,9 +272,10 @@ static int layout_cnodes(struct ubifs_info *c)
if (offs + c->lsave_sz > c->leb_size) {
alen = ALIGN(offs, c->min_io_size);
upd_ltab(c, lnum, c->leb_size - alen, alen - offs);
dbg_chk_lpt_sz(c, 2, alen - offs);
err = alloc_lpt_leb(c, &lnum);
if (err)
return err;
goto no_space;
offs = 0;
ubifs_assert(lnum >= c->lpt_first &&
lnum <= c->lpt_last);
@@ -276,6 +284,7 @@ static int layout_cnodes(struct ubifs_info *c)
c->lsave_lnum = lnum;
c->lsave_offs = offs;
offs += c->lsave_sz;
dbg_chk_lpt_sz(c, 1, c->lsave_sz);
}
/* Make sure to place LPT's own lprops table */
@@ -283,9 +292,10 @@ static int layout_cnodes(struct ubifs_info *c)
if (offs + c->ltab_sz > c->leb_size) {
alen = ALIGN(offs, c->min_io_size);
upd_ltab(c, lnum, c->leb_size - alen, alen - offs);
dbg_chk_lpt_sz(c, 2, alen - offs);
err = alloc_lpt_leb(c, &lnum);
if (err)
return err;
goto no_space;
offs = 0;
ubifs_assert(lnum >= c->lpt_first &&
lnum <= c->lpt_last);
@@ -294,11 +304,23 @@ static int layout_cnodes(struct ubifs_info *c)
c->ltab_lnum = lnum;
c->ltab_offs = offs;
offs += c->ltab_sz;
dbg_chk_lpt_sz(c, 1, c->ltab_sz);
}
alen = ALIGN(offs, c->min_io_size);
upd_ltab(c, lnum, c->leb_size - alen, alen - offs);
dbg_chk_lpt_sz(c, 4, alen - offs);
err = dbg_chk_lpt_sz(c, 3, alen);
if (err)
return err;
return 0;
no_space:
ubifs_err("LPT out of space");
dbg_err("LPT out of space at LEB %d:%d needing %d, done_ltab %d, "
"done_lsave %d", lnum, offs, len, done_ltab, done_lsave);
dbg_dump_lpt_info(c);
return err;
}
/**
@@ -333,8 +355,6 @@ static int realloc_lpt_leb(struct ubifs_info *c, int *lnum)
*lnum = i + c->lpt_first;
return 0;
}
dbg_err("last LEB %d", *lnum);
dump_stack();
return -ENOSPC;
}
@@ -369,12 +389,14 @@ static int write_cnodes(struct ubifs_info *c)
done_lsave = 1;
ubifs_pack_lsave(c, buf + offs, c->lsave);
offs += c->lsave_sz;
dbg_chk_lpt_sz(c, 1, c->lsave_sz);
}
if (offs + c->ltab_sz <= c->leb_size) {
done_ltab = 1;
ubifs_pack_ltab(c, buf + offs, c->ltab_cmt);
offs += c->ltab_sz;
dbg_chk_lpt_sz(c, 1, c->ltab_sz);
}
/* Loop for each cnode */
@@ -392,10 +414,12 @@ static int write_cnodes(struct ubifs_info *c)
alen, UBI_SHORTTERM);
if (err)
return err;
dbg_chk_lpt_sz(c, 4, alen - wlen);
}
dbg_chk_lpt_sz(c, 2, 0);
err = realloc_lpt_leb(c, &lnum);
if (err)
return err;
goto no_space;
offs = 0;
from = 0;
ubifs_assert(lnum >= c->lpt_first &&
@@ -408,12 +432,14 @@ static int write_cnodes(struct ubifs_info *c)
done_lsave = 1;
ubifs_pack_lsave(c, buf + offs, c->lsave);
offs += c->lsave_sz;
dbg_chk_lpt_sz(c, 1, c->lsave_sz);
continue;
}
if (!done_ltab) {
done_ltab = 1;
ubifs_pack_ltab(c, buf + offs, c->ltab_cmt);
offs += c->ltab_sz;
dbg_chk_lpt_sz(c, 1, c->ltab_sz);
continue;
}
break;
@@ -435,6 +461,7 @@ static int write_cnodes(struct ubifs_info *c)
clear_bit(COW_ZNODE, &cnode->flags);
smp_mb__after_clear_bit();
offs += len;
dbg_chk_lpt_sz(c, 1, len);
cnode = cnode->cnext;
} while (cnode && cnode != c->lpt_cnext);
@@ -448,9 +475,10 @@ static int write_cnodes(struct ubifs_info *c)
UBI_SHORTTERM);
if (err)
return err;
dbg_chk_lpt_sz(c, 2, alen - wlen);
err = realloc_lpt_leb(c, &lnum);
if (err)
return err;
goto no_space;
offs = 0;
ubifs_assert(lnum >= c->lpt_first &&
lnum <= c->lpt_last);
@@ -461,6 +489,7 @@ static int write_cnodes(struct ubifs_info *c)
done_lsave = 1;
ubifs_pack_lsave(c, buf + offs, c->lsave);
offs += c->lsave_sz;
dbg_chk_lpt_sz(c, 1, c->lsave_sz);
}
/* Make sure to place LPT's own lprops table */
@@ -473,9 +502,10 @@ static int write_cnodes(struct ubifs_info *c)
UBI_SHORTTERM);
if (err)
return err;
dbg_chk_lpt_sz(c, 2, alen - wlen);
err = realloc_lpt_leb(c, &lnum);
if (err)
return err;
goto no_space;
offs = 0;
ubifs_assert(lnum >= c->lpt_first &&
lnum <= c->lpt_last);
@@ -486,6 +516,7 @@ static int write_cnodes(struct ubifs_info *c)
done_ltab = 1;
ubifs_pack_ltab(c, buf + offs, c->ltab_cmt);
offs += c->ltab_sz;
dbg_chk_lpt_sz(c, 1, c->ltab_sz);
}
/* Write remaining data in buffer */
@@ -495,6 +526,12 @@ static int write_cnodes(struct ubifs_info *c)
err = ubifs_leb_write(c, lnum, buf + from, from, alen, UBI_SHORTTERM);
if (err)
return err;
dbg_chk_lpt_sz(c, 4, alen - wlen);
err = dbg_chk_lpt_sz(c, 3, ALIGN(offs, c->min_io_size));
if (err)
return err;
c->nhead_lnum = lnum;
c->nhead_offs = ALIGN(offs, c->min_io_size);
@@ -503,7 +540,15 @@ static int write_cnodes(struct ubifs_info *c)
dbg_lp("LPT ltab is at %d:%d", c->ltab_lnum, c->ltab_offs);
if (c->big_lpt)
dbg_lp("LPT lsave is at %d:%d", c->lsave_lnum, c->lsave_offs);
return 0;
no_space:
ubifs_err("LPT out of space mismatch");
dbg_err("LPT out of space mismatch at LEB %d:%d needing %d, done_ltab "
"%d, done_lsave %d", lnum, offs, len, done_ltab, done_lsave);
dbg_dump_lpt_info(c);
return err;
}
/**
@@ -1044,6 +1089,8 @@ static int is_a_node(struct ubifs_info *c, uint8_t *buf, int len)
int pos = 0, node_type, node_len;
uint16_t crc, calc_crc;
if (len < UBIFS_LPT_CRC_BYTES + (UBIFS_LPT_TYPE_BITS + 7) / 8)
return 0;
node_type = ubifs_unpack_bits(&addr, &pos, UBIFS_LPT_TYPE_BITS);
if (node_type == UBIFS_LPT_NOT_A_NODE)
return 0;
@@ -1156,6 +1203,9 @@ int ubifs_lpt_start_commit(struct ubifs_info *c)
dbg_lp("");
mutex_lock(&c->lp_mutex);
err = dbg_chk_lpt_free_spc(c);
if (err)
goto out;
err = dbg_check_ltab(c);
if (err)
goto out;
@@ -1645,4 +1695,121 @@ int dbg_check_ltab(struct ubifs_info *c)
return 0;
}
/**
* dbg_chk_lpt_free_spc - check LPT free space is enough to write entire LPT.
* @c: the UBIFS file-system description object
*
* This function returns %0 on success and a negative error code on failure.
*/
int dbg_chk_lpt_free_spc(struct ubifs_info *c)
{
long long free = 0;
int i;
for (i = 0; i < c->lpt_lebs; i++) {
if (c->ltab[i].tgc || c->ltab[i].cmt)
continue;
if (i + c->lpt_first == c->nhead_lnum)
free += c->leb_size - c->nhead_offs;
else if (c->ltab[i].free == c->leb_size)
free += c->leb_size;
}
if (free < c->lpt_sz) {
dbg_err("LPT space error: free %lld lpt_sz %lld",
free, c->lpt_sz);
dbg_dump_lpt_info(c);
return -EINVAL;
}
return 0;
}
/**
* dbg_chk_lpt_sz - check LPT does not write more than LPT size.
* @c: the UBIFS file-system description object
* @action: action
* @len: length written
*
* This function returns %0 on success and a negative error code on failure.
*/
int dbg_chk_lpt_sz(struct ubifs_info *c, int action, int len)
{
long long chk_lpt_sz, lpt_sz;
int err = 0;
switch (action) {
case 0:
c->chk_lpt_sz = 0;
c->chk_lpt_sz2 = 0;
c->chk_lpt_lebs = 0;
c->chk_lpt_wastage = 0;
if (c->dirty_pn_cnt > c->pnode_cnt) {
dbg_err("dirty pnodes %d exceed max %d",
c->dirty_pn_cnt, c->pnode_cnt);
err = -EINVAL;
}
if (c->dirty_nn_cnt > c->nnode_cnt) {
dbg_err("dirty nnodes %d exceed max %d",
c->dirty_nn_cnt, c->nnode_cnt);
err = -EINVAL;
}
return err;
case 1:
c->chk_lpt_sz += len;
return 0;
case 2:
c->chk_lpt_sz += len;
c->chk_lpt_wastage += len;
c->chk_lpt_lebs += 1;
return 0;
case 3:
chk_lpt_sz = c->leb_size;
chk_lpt_sz *= c->chk_lpt_lebs;
chk_lpt_sz += len - c->nhead_offs;
if (c->chk_lpt_sz != chk_lpt_sz) {
dbg_err("LPT wrote %lld but space used was %lld",
c->chk_lpt_sz, chk_lpt_sz);
err = -EINVAL;
}
if (c->chk_lpt_sz > c->lpt_sz) {
dbg_err("LPT wrote %lld but lpt_sz is %lld",
c->chk_lpt_sz, c->lpt_sz);
err = -EINVAL;
}
if (c->chk_lpt_sz2 && c->chk_lpt_sz != c->chk_lpt_sz2) {
dbg_err("LPT layout size %lld but wrote %lld",
c->chk_lpt_sz, c->chk_lpt_sz2);
err = -EINVAL;
}
if (c->chk_lpt_sz2 && c->new_nhead_offs != len) {
dbg_err("LPT new nhead offs: expected %d was %d",
c->new_nhead_offs, len);
err = -EINVAL;
}
lpt_sz = (long long)c->pnode_cnt * c->pnode_sz;
lpt_sz += (long long)c->nnode_cnt * c->nnode_sz;
lpt_sz += c->ltab_sz;
if (c->big_lpt)
lpt_sz += c->lsave_sz;
if (c->chk_lpt_sz - c->chk_lpt_wastage > lpt_sz) {
dbg_err("LPT chk_lpt_sz %lld + waste %lld exceeds %lld",
c->chk_lpt_sz, c->chk_lpt_wastage, lpt_sz);
err = -EINVAL;
}
if (err)
dbg_dump_lpt_info(c);
c->chk_lpt_sz2 = c->chk_lpt_sz;
c->chk_lpt_sz = 0;
c->chk_lpt_wastage = 0;
c->chk_lpt_lebs = 0;
c->new_nhead_offs = len;
return err;
case 4:
c->chk_lpt_sz += len;
c->chk_lpt_wastage += len;
return 0;
default:
return -EINVAL;
}
}
#endif /* CONFIG_UBIFS_FS_DEBUG */

27
fs/ubifs/misc.h
View File

@@ -310,4 +310,31 @@ static inline int ubifs_tnc_lookup(struct ubifs_info *c,
return ubifs_tnc_locate(c, key, node, NULL, NULL);
}
/**
* ubifs_get_lprops - get reference to LEB properties.
* @c: the UBIFS file-system description object
*
* This function locks lprops. Lprops have to be unlocked by
* 'ubifs_release_lprops()'.
*/
static inline void ubifs_get_lprops(struct ubifs_info *c)
{
mutex_lock(&c->lp_mutex);
}
/**
* ubifs_release_lprops - release lprops lock.
* @c: the UBIFS file-system description object
*
* This function has to be called after each 'ubifs_get_lprops()' call to
* unlock lprops.
*/
static inline void ubifs_release_lprops(struct ubifs_info *c)
{
ubifs_assert(mutex_is_locked(&c->lp_mutex));
ubifs_assert(c->lst.empty_lebs >= 0 &&
c->lst.empty_lebs <= c->main_lebs);
mutex_unlock(&c->lp_mutex);
}
#endif /* __UBIFS_MISC_H__ */

2
fs/ubifs/scan.c
View File

@@ -87,7 +87,7 @@ int ubifs_scan_a_node(const struct ubifs_info *c, void *buf, int len, int lnum,
dbg_scan("scanning %s", dbg_ntype(ch->node_type));
if (ubifs_check_node(c, buf, lnum, offs, quiet))
if (ubifs_check_node(c, buf, lnum, offs, quiet, 1))
return SCANNED_A_CORRUPT_NODE;
if (ch->node_type == UBIFS_PAD_NODE) {

109
fs/ubifs/super.c
View File

@@ -401,6 +401,16 @@ static int ubifs_show_options(struct seq_file *s, struct vfsmount *mnt)
else if (c->mount_opts.unmount_mode == 1)
seq_printf(s, ",norm_unmount");
if (c->mount_opts.bulk_read == 2)
seq_printf(s, ",bulk_read");
else if (c->mount_opts.bulk_read == 1)
seq_printf(s, ",no_bulk_read");
if (c->mount_opts.chk_data_crc == 2)
seq_printf(s, ",chk_data_crc");
else if (c->mount_opts.chk_data_crc == 1)
seq_printf(s, ",no_chk_data_crc");
return 0;
}
@@ -408,13 +418,26 @@ static int ubifs_sync_fs(struct super_block *sb, int wait)
{
struct ubifs_info *c = sb->s_fs_info;
int i, ret = 0, err;
long long bud_bytes;
if (c->jheads)
if (c->jheads) {
for (i = 0; i < c->jhead_cnt; i++) {
err = ubifs_wbuf_sync(&c->jheads[i].wbuf);
if (err && !ret)
ret = err;
}
/* Commit the journal unless it has too little data */
spin_lock(&c->buds_lock);
bud_bytes = c->bud_bytes;
spin_unlock(&c->buds_lock);
if (bud_bytes > c->leb_size) {
err = ubifs_run_commit(c);
if (err)
return err;
}
}
/*
* We ought to call sync for c->ubi but it does not have one. If it had
* it would in turn call mtd->sync, however mtd operations are
@@ -538,6 +561,18 @@ static int init_constants_early(struct ubifs_info *c)
* calculations when reporting free space.
*/
c->leb_overhead = c->leb_size % UBIFS_MAX_DATA_NODE_SZ;
/* Buffer size for bulk-reads */
c->bulk_read_buf_size = UBIFS_MAX_BULK_READ * UBIFS_MAX_DATA_NODE_SZ;
if (c->bulk_read_buf_size > c->leb_size)
c->bulk_read_buf_size = c->leb_size;
if (c->bulk_read_buf_size > 128 * 1024) {
/* Check if we can kmalloc more than 128KiB */
void *try = kmalloc(c->bulk_read_buf_size, GFP_KERNEL);
kfree(try);
if (!try)
c->bulk_read_buf_size = 128 * 1024;
}
return 0;
}
@@ -840,17 +875,29 @@ static int check_volume_empty(struct ubifs_info *c)
*
* Opt_fast_unmount: do not run a journal commit before un-mounting
* Opt_norm_unmount: run a journal commit before un-mounting
* Opt_bulk_read: enable bulk-reads
* Opt_no_bulk_read: disable bulk-reads
* Opt_chk_data_crc: check CRCs when reading data nodes
* Opt_no_chk_data_crc: do not check CRCs when reading data nodes
* Opt_err: just end of array marker
*/
enum {
Opt_fast_unmount,
Opt_norm_unmount,
Opt_bulk_read,
Opt_no_bulk_read,
Opt_chk_data_crc,
Opt_no_chk_data_crc,
Opt_err,
};
static const match_table_t tokens = {
{Opt_fast_unmount, "fast_unmount"},
{Opt_norm_unmount, "norm_unmount"},
{Opt_bulk_read, "bulk_read"},
{Opt_no_bulk_read, "no_bulk_read"},
{Opt_chk_data_crc, "chk_data_crc"},
{Opt_no_chk_data_crc, "no_chk_data_crc"},
{Opt_err, NULL},
};
@@ -888,6 +935,22 @@ static int ubifs_parse_options(struct ubifs_info *c, char *options,
c->mount_opts.unmount_mode = 1;
c->fast_unmount = 0;
break;
case Opt_bulk_read:
c->mount_opts.bulk_read = 2;
c->bulk_read = 1;
break;
case Opt_no_bulk_read:
c->mount_opts.bulk_read = 1;
c->bulk_read = 0;
break;
case Opt_chk_data_crc:
c->mount_opts.chk_data_crc = 2;
c->no_chk_data_crc = 0;
break;
case Opt_no_chk_data_crc:
c->mount_opts.chk_data_crc = 1;
c->no_chk_data_crc = 1;
break;
default:
ubifs_err("unrecognized mount option \"%s\" "
"or missing value", p);
@@ -996,6 +1059,8 @@ static int mount_ubifs(struct ubifs_info *c)
goto out_free;
}
c->always_chk_crc = 1;
err = ubifs_read_superblock(c);
if (err)
goto out_free;
@@ -1032,8 +1097,6 @@ static int mount_ubifs(struct ubifs_info *c)
/* Create background thread */
c->bgt = kthread_create(ubifs_bg_thread, c, c->bgt_name);
if (!c->bgt)
c->bgt = ERR_PTR(-EINVAL);
if (IS_ERR(c->bgt)) {
err = PTR_ERR(c->bgt);
c->bgt = NULL;
@@ -1139,24 +1202,28 @@ static int mount_ubifs(struct ubifs_info *c)
if (err)
goto out_infos;
c->always_chk_crc = 0;
ubifs_msg("mounted UBI device %d, volume %d, name \"%s\"",
c->vi.ubi_num, c->vi.vol_id, c->vi.name);
if (mounted_read_only)
ubifs_msg("mounted read-only");
x = (long long)c->main_lebs * c->leb_size;
ubifs_msg("file system size: %lld bytes (%lld KiB, %lld MiB, %d LEBs)",
x, x >> 10, x >> 20, c->main_lebs);
ubifs_msg("file system size: %lld bytes (%lld KiB, %lld MiB, %d "
"LEBs)", x, x >> 10, x >> 20, c->main_lebs);
x = (long long)c->log_lebs * c->leb_size + c->max_bud_bytes;
ubifs_msg("journal size: %lld bytes (%lld KiB, %lld MiB, %d LEBs)",
x, x >> 10, x >> 20, c->log_lebs + c->max_bud_cnt);
ubifs_msg("default compressor: %s", ubifs_compr_name(c->default_compr));
ubifs_msg("media format %d, latest format %d",
ubifs_msg("journal size: %lld bytes (%lld KiB, %lld MiB, %d "
"LEBs)", x, x >> 10, x >> 20, c->log_lebs + c->max_bud_cnt);
ubifs_msg("media format: %d (latest is %d)",
c->fmt_version, UBIFS_FORMAT_VERSION);
ubifs_msg("default compressor: %s", ubifs_compr_name(c->default_compr));
ubifs_msg("reserved for root: %llu bytes (%llu KiB)",
c->report_rp_size, c->report_rp_size >> 10);
dbg_msg("compiled on: " __DATE__ " at " __TIME__);
dbg_msg("min. I/O unit size: %d bytes", c->min_io_size);
dbg_msg("LEB size: %d bytes (%d KiB)",
c->leb_size, c->leb_size / 1024);
c->leb_size, c->leb_size >> 10);
dbg_msg("data journal heads: %d",
c->jhead_cnt - NONDATA_JHEADS_CNT);
dbg_msg("UUID: %02X%02X%02X%02X-%02X%02X"
@@ -1282,6 +1349,7 @@ static int ubifs_remount_rw(struct ubifs_info *c)
mutex_lock(&c->umount_mutex);
c->remounting_rw = 1;
c->always_chk_crc = 1;
/* Check for enough free space */
if (ubifs_calc_available(c, c->min_idx_lebs) <= 0) {
@@ -1345,20 +1413,20 @@ static int ubifs_remount_rw(struct ubifs_info *c)
/* Create background thread */
c->bgt = kthread_create(ubifs_bg_thread, c, c->bgt_name);
if (!c->bgt)
c->bgt = ERR_PTR(-EINVAL);
if (IS_ERR(c->bgt)) {
err = PTR_ERR(c->bgt);
c->bgt = NULL;
ubifs_err("cannot spawn \"%s\", error %d",
c->bgt_name, err);
return err;
goto out;
}
wake_up_process(c->bgt);
c->orph_buf = vmalloc(c->leb_size);
if (!c->orph_buf)
return -ENOMEM;
if (!c->orph_buf) {
err = -ENOMEM;
goto out;
}
/* Check for enough log space */
lnum = c->lhead_lnum + 1;
@@ -1385,6 +1453,7 @@ static int ubifs_remount_rw(struct ubifs_info *c)
dbg_gen("re-mounted read-write");
c->vfs_sb->s_flags &= ~MS_RDONLY;
c->remounting_rw = 0;
c->always_chk_crc = 0;
mutex_unlock(&c->umount_mutex);
return 0;
@@ -1400,6 +1469,7 @@ out:
c->ileb_buf = NULL;
ubifs_lpt_free(c, 1);
c->remounting_rw = 0;
c->always_chk_crc = 0;
mutex_unlock(&c->umount_mutex);
return err;
}
@@ -1408,12 +1478,9 @@ out:
* commit_on_unmount - commit the journal when un-mounting.
* @c: UBIFS file-system description object
*
* This function is called during un-mounting and it commits the journal unless
* the "fast unmount" mode is enabled. It also avoids committing the journal if
* it contains too few data.
*
* Sometimes recovery requires the journal to be committed at least once, and
* this function takes care about this.
* This function is called during un-mounting and re-mounting, and it commits
* the journal unless the "fast unmount" mode is enabled. It also avoids
* committing the journal if it contains too few data.
*/
static void commit_on_unmount(struct ubifs_info *c)
{

345
fs/ubifs/tnc.c
View File

@@ -284,7 +284,7 @@ static struct ubifs_znode *dirty_cow_znode(struct ubifs_info *c,
}
zn = copy_znode(c, znode);
if (unlikely(IS_ERR(zn)))
if (IS_ERR(zn))
return zn;
if (zbr->len) {
@@ -470,6 +470,10 @@ static int try_read_node(const struct ubifs_info *c, void *buf, int type,
if (node_len != len)
return 0;
if (type == UBIFS_DATA_NODE && !c->always_chk_crc)
if (c->no_chk_data_crc)
return 0;
crc = crc32(UBIFS_CRC32_INIT, buf + 8, node_len - 8);
node_crc = le32_to_cpu(ch->crc);
if (crc != node_crc)
@@ -1128,7 +1132,7 @@ static struct ubifs_znode *dirty_cow_bottom_up(struct ubifs_info *c,
ubifs_assert(znode == c->zroot.znode);
znode = dirty_cow_znode(c, &c->zroot);
}
if (unlikely(IS_ERR(znode)) || !p)
if (IS_ERR(znode) || !p)
break;
ubifs_assert(path[p - 1] >= 0);
ubifs_assert(path[p - 1] < znode->child_cnt);
@@ -1491,6 +1495,289 @@ out:
return err;
}
/**
* ubifs_tnc_get_bu_keys - lookup keys for bulk-read.
* @c: UBIFS file-system description object
* @bu: bulk-read parameters and results
*
* Lookup consecutive data node keys for the same inode that reside
* consecutively in the same LEB.
*/
int ubifs_tnc_get_bu_keys(struct ubifs_info *c, struct bu_info *bu)
{
int n, err = 0, lnum = -1, uninitialized_var(offs);
int uninitialized_var(len);
unsigned int block = key_block(c, &bu->key);
struct ubifs_znode *znode;
bu->cnt = 0;
bu->blk_cnt = 0;
bu->eof = 0;
mutex_lock(&c->tnc_mutex);
/* Find first key */
err = ubifs_lookup_level0(c, &bu->key, &znode, &n);
if (err < 0)
goto out;
if (err) {
/* Key found */
len = znode->zbranch[n].len;
/* The buffer must be big enough for at least 1 node */
if (len > bu->buf_len) {
err = -EINVAL;
goto out;
}
/* Add this key */
bu->zbranch[bu->cnt++] = znode->zbranch[n];
bu->blk_cnt += 1;
lnum = znode->zbranch[n].lnum;
offs = ALIGN(znode->zbranch[n].offs + len, 8);
}
while (1) {
struct ubifs_zbranch *zbr;
union ubifs_key *key;
unsigned int next_block;
/* Find next key */
err = tnc_next(c, &znode, &n);
if (err)
goto out;
zbr = &znode->zbranch[n];
key = &zbr->key;
/* See if there is another data key for this file */
if (key_inum(c, key) != key_inum(c, &bu->key) ||
key_type(c, key) != UBIFS_DATA_KEY) {
err = -ENOENT;
goto out;
}
if (lnum < 0) {
/* First key found */
lnum = zbr->lnum;
offs = ALIGN(zbr->offs + zbr->len, 8);
len = zbr->len;
if (len > bu->buf_len) {
err = -EINVAL;
goto out;
}
} else {
/*
* The data nodes must be in consecutive positions in
* the same LEB.
*/
if (zbr->lnum != lnum || zbr->offs != offs)
goto out;
offs += ALIGN(zbr->len, 8);
len = ALIGN(len, 8) + zbr->len;
/* Must not exceed buffer length */
if (len > bu->buf_len)
goto out;
}
/* Allow for holes */
next_block = key_block(c, key);
bu->blk_cnt += (next_block - block - 1);
if (bu->blk_cnt >= UBIFS_MAX_BULK_READ)
goto out;
block = next_block;
/* Add this key */
bu->zbranch[bu->cnt++] = *zbr;
bu->blk_cnt += 1;
/* See if we have room for more */
if (bu->cnt >= UBIFS_MAX_BULK_READ)
goto out;
if (bu->blk_cnt >= UBIFS_MAX_BULK_READ)
goto out;
}
out:
if (err == -ENOENT) {
bu->eof = 1;
err = 0;
}
bu->gc_seq = c->gc_seq;
mutex_unlock(&c->tnc_mutex);
if (err)
return err;
/*
* An enormous hole could cause bulk-read to encompass too many
* page cache pages, so limit the number here.
*/
if (bu->blk_cnt > UBIFS_MAX_BULK_READ)
bu->blk_cnt = UBIFS_MAX_BULK_READ;
/*
* Ensure that bulk-read covers a whole number of page cache
* pages.
*/
if (UBIFS_BLOCKS_PER_PAGE == 1 ||
!(bu->blk_cnt & (UBIFS_BLOCKS_PER_PAGE - 1)))
return 0;
if (bu->eof) {
/* At the end of file we can round up */
bu->blk_cnt += UBIFS_BLOCKS_PER_PAGE - 1;
return 0;
}
/* Exclude data nodes that do not make up a whole page cache page */
block = key_block(c, &bu->key) + bu->blk_cnt;
block &= ~(UBIFS_BLOCKS_PER_PAGE - 1);
while (bu->cnt) {
if (key_block(c, &bu->zbranch[bu->cnt - 1].key) < block)
break;
bu->cnt -= 1;
}
return 0;
}
/**
* read_wbuf - bulk-read from a LEB with a wbuf.
* @wbuf: wbuf that may overlap the read
* @buf: buffer into which to read
* @len: read length
* @lnum: LEB number from which to read
* @offs: offset from which to read
*
* This functions returns %0 on success or a negative error code on failure.
*/
static int read_wbuf(struct ubifs_wbuf *wbuf, void *buf, int len, int lnum,
int offs)
{
const struct ubifs_info *c = wbuf->c;
int rlen, overlap;
dbg_io("LEB %d:%d, length %d", lnum, offs, len);
ubifs_assert(wbuf && lnum >= 0 && lnum < c->leb_cnt && offs >= 0);
ubifs_assert(!(offs & 7) && offs < c->leb_size);
ubifs_assert(offs + len <= c->leb_size);
spin_lock(&wbuf->lock);
overlap = (lnum == wbuf->lnum && offs + len > wbuf->offs);
if (!overlap) {
/* We may safely unlock the write-buffer and read the data */
spin_unlock(&wbuf->lock);
return ubi_read(c->ubi, lnum, buf, offs, len);
}
/* Don't read under wbuf */
rlen = wbuf->offs - offs;
if (rlen < 0)
rlen = 0;
/* Copy the rest from the write-buffer */
memcpy(buf + rlen, wbuf->buf + offs + rlen - wbuf->offs, len - rlen);
spin_unlock(&wbuf->lock);
if (rlen > 0)
/* Read everything that goes before write-buffer */
return ubi_read(c->ubi, lnum, buf, offs, rlen);
return 0;
}
/**
* validate_data_node - validate data nodes for bulk-read.
* @c: UBIFS file-system description object
* @buf: buffer containing data node to validate
* @zbr: zbranch of data node to validate
*
* This functions returns %0 on success or a negative error code on failure.
*/
static int validate_data_node(struct ubifs_info *c, void *buf,
struct ubifs_zbranch *zbr)
{
union ubifs_key key1;
struct ubifs_ch *ch = buf;
int err, len;
if (ch->node_type != UBIFS_DATA_NODE) {
ubifs_err("bad node type (%d but expected %d)",
ch->node_type, UBIFS_DATA_NODE);
goto out_err;
}
err = ubifs_check_node(c, buf, zbr->lnum, zbr->offs, 0, 0);
if (err) {
ubifs_err("expected node type %d", UBIFS_DATA_NODE);
goto out;
}
len = le32_to_cpu(ch->len);
if (len != zbr->len) {
ubifs_err("bad node length %d, expected %d", len, zbr->len);
goto out_err;
}
/* Make sure the key of the read node is correct */
key_read(c, buf + UBIFS_KEY_OFFSET, &key1);
if (!keys_eq(c, &zbr->key, &key1)) {
ubifs_err("bad key in node at LEB %d:%d",
zbr->lnum, zbr->offs);
dbg_tnc("looked for key %s found node's key %s",
DBGKEY(&zbr->key), DBGKEY1(&key1));
goto out_err;
}
return 0;
out_err:
err = -EINVAL;
out:
ubifs_err("bad node at LEB %d:%d", zbr->lnum, zbr->offs);
dbg_dump_node(c, buf);
dbg_dump_stack();
return err;
}
/**
* ubifs_tnc_bulk_read - read a number of data nodes in one go.
* @c: UBIFS file-system description object
* @bu: bulk-read parameters and results
*
* This functions reads and validates the data nodes that were identified by the
* 'ubifs_tnc_get_bu_keys()' function. This functions returns %0 on success,
* -EAGAIN to indicate a race with GC, or another negative error code on
* failure.
*/
int ubifs_tnc_bulk_read(struct ubifs_info *c, struct bu_info *bu)
{
int lnum = bu->zbranch[0].lnum, offs = bu->zbranch[0].offs, len, err, i;
struct ubifs_wbuf *wbuf;
void *buf;
len = bu->zbranch[bu->cnt - 1].offs;
len += bu->zbranch[bu->cnt - 1].len - offs;
if (len > bu->buf_len) {
ubifs_err("buffer too small %d vs %d", bu->buf_len, len);
return -EINVAL;
}
/* Do the read */
wbuf = ubifs_get_wbuf(c, lnum);
if (wbuf)
err = read_wbuf(wbuf, bu->buf, len, lnum, offs);
else
err = ubi_read(c->ubi, lnum, bu->buf, offs, len);
/* Check for a race with GC */
if (maybe_leb_gced(c, lnum, bu->gc_seq))
return -EAGAIN;
if (err && err != -EBADMSG) {
ubifs_err("failed to read from LEB %d:%d, error %d",
lnum, offs, err);
dbg_dump_stack();
dbg_tnc("key %s", DBGKEY(&bu->key));
return err;
}
/* Validate the nodes read */
buf = bu->buf;
for (i = 0; i < bu->cnt; i++) {
err = validate_data_node(c, buf, &bu->zbranch[i]);
if (err)
return err;
buf = buf + ALIGN(bu->zbranch[i].len, 8);
}
return 0;
}
/**
* do_lookup_nm- look up a "hashed" node.
* @c: UBIFS file-system description object
@@ -1675,7 +1962,7 @@ static int tnc_insert(struct ubifs_info *c, struct ubifs_znode *znode,
{
struct ubifs_znode *zn, *zi, *zp;
int i, keep, move, appending = 0;
union ubifs_key *key = &zbr->key;
union ubifs_key *key = &zbr->key, *key1;
ubifs_assert(n >= 0 && n <= c->fanout);
@@ -1716,20 +2003,33 @@ again:
zn->level = znode->level;
/* Decide where to split */
if (znode->level == 0 && n == c->fanout &&
key_type(c, key) == UBIFS_DATA_KEY) {
union ubifs_key *key1;
/*
* If this is an inode which is being appended - do not split
* it because no other zbranches can be inserted between
* zbranches of consecutive data nodes anyway.
*/
key1 = &znode->zbranch[n - 1].key;
if (key_inum(c, key1) == key_inum(c, key) &&
key_type(c, key1) == UBIFS_DATA_KEY &&
key_block(c, key1) == key_block(c, key) - 1)
appending = 1;
if (znode->level == 0 && key_type(c, key) == UBIFS_DATA_KEY) {
/* Try not to split consecutive data keys */
if (n == c->fanout) {
key1 = &znode->zbranch[n - 1].key;
if (key_inum(c, key1) == key_inum(c, key) &&
key_type(c, key1) == UBIFS_DATA_KEY)
appending = 1;
} else
goto check_split;
} else if (appending && n != c->fanout) {
/* Try not to split consecutive data keys */
appending = 0;
check_split:
if (n >= (c->fanout + 1) / 2) {
key1 = &znode->zbranch[0].key;
if (key_inum(c, key1) == key_inum(c, key) &&
key_type(c, key1) == UBIFS_DATA_KEY) {
key1 = &znode->zbranch[n].key;
if (key_inum(c, key1) != key_inum(c, key) ||
key_type(c, key1) != UBIFS_DATA_KEY) {
keep = n;
move = c->fanout - keep;
zi = znode;
goto do_split;
}
}
}
}
if (appending) {
@@ -1759,6 +2059,8 @@ again:
zbr->znode->parent = zn;
}
do_split:
__set_bit(DIRTY_ZNODE, &zn->flags);
atomic_long_inc(&c->dirty_zn_cnt);
@@ -1785,14 +2087,11 @@ again:
/* Insert new znode (produced by spitting) into the parent */
if (zp) {
i = n;
if (n == 0 && zi == znode && znode->iip == 0)
correct_parent_keys(c, znode);
/* Locate insertion point */
n = znode->iip + 1;
if (appending && n != c->fanout)
appending = 0;
if (i == 0 && zi == znode && znode->iip == 0)
correct_parent_keys(c, znode);
/* Tail recursion */
zbr->key = zn->zbranch[0].key;

4
fs/ubifs/tnc_misc.c
View File

@@ -480,8 +480,8 @@ int ubifs_tnc_read_node(struct ubifs_info *c, struct ubifs_zbranch *zbr,
}
/* Make sure the key of the read node is correct */
key_read(c, key, &key1);
if (memcmp(node + UBIFS_KEY_OFFSET, &key1, c->key_len)) {
key_read(c, node + UBIFS_KEY_OFFSET, &key1);
if (!keys_eq(c, key, &key1)) {
ubifs_err("bad key in node at LEB %d:%d",
zbr->lnum, zbr->offs);
dbg_tnc("looked for key %s found node's key %s",

1
fs/ubifs/ubifs-media.h
View File

@@ -75,7 +75,6 @@
*/
#define UBIFS_BLOCK_SIZE 4096
#define UBIFS_BLOCK_SHIFT 12
#define UBIFS_BLOCK_MASK 0x00000FFF
/* UBIFS padding byte pattern (must not be first or last byte of node magic) */
#define UBIFS_PADDING_BYTE 0xCE

85
fs/ubifs/ubifs.h
View File

@@ -142,6 +142,9 @@
/* Maximum expected tree height for use by bottom_up_buf */
#define BOTTOM_UP_HEIGHT 64
/* Maximum number of data nodes to bulk-read */
#define UBIFS_MAX_BULK_READ 32
/*
* Lockdep classes for UBIFS inode @ui_mutex.
*/
@@ -328,9 +331,10 @@ struct ubifs_gced_idx_leb {
* this inode
* @dirty: non-zero if the inode is dirty
* @xattr: non-zero if this is an extended attribute inode
* @bulk_read: non-zero if bulk-read should be used
* @ui_mutex: serializes inode write-back with the rest of VFS operations,
* serializes "clean <-> dirty" state changes, protects @dirty,
* @ui_size, and @xattr_size
* serializes "clean <-> dirty" state changes, serializes bulk-read,
* protects @dirty, @bulk_read, @ui_size, and @xattr_size
* @ui_lock: protects @synced_i_size
* @synced_i_size: synchronized size of inode, i.e. the value of inode size
* currently stored on the flash; used only for regular file
@@ -338,6 +342,8 @@ struct ubifs_gced_idx_leb {
* @ui_size: inode size used by UBIFS when writing to flash
* @flags: inode flags (@UBIFS_COMPR_FL, etc)
* @compr_type: default compression type used for this inode
* @last_page_read: page number of last page read (for bulk read)
* @read_in_a_row: number of consecutive pages read in a row (for bulk read)
* @data_len: length of the data attached to the inode
* @data: inode's data
*
@@ -379,12 +385,15 @@ struct ubifs_inode {
unsigned int xattr_names;
unsigned int dirty:1;
unsigned int xattr:1;
unsigned int bulk_read:1;
struct mutex ui_mutex;
spinlock_t ui_lock;
loff_t synced_i_size;
loff_t ui_size;
int flags;
int compr_type;
pgoff_t last_page_read;
pgoff_t read_in_a_row;
int data_len;
void *data;
};
@@ -698,8 +707,8 @@ struct ubifs_jhead {
* struct ubifs_zbranch - key/coordinate/length branch stored in znodes.
* @key: key
* @znode: znode address in memory
* @lnum: LEB number of the indexing node
* @offs: offset of the indexing node within @lnum
* @lnum: LEB number of the target node (indexing node or data node)
* @offs: target node offset within @lnum
* @len: target node length
*/
struct ubifs_zbranch {
@@ -743,6 +752,28 @@ struct ubifs_znode {
struct ubifs_zbranch zbranch[];
};
/**
* struct bu_info - bulk-read information
* @key: first data node key
* @zbranch: zbranches of data nodes to bulk read
* @buf: buffer to read into
* @buf_len: buffer length
* @gc_seq: GC sequence number to detect races with GC
* @cnt: number of data nodes for bulk read
* @blk_cnt: number of data blocks including holes
* @oef: end of file reached
*/
struct bu_info {
union ubifs_key key;
struct ubifs_zbranch zbranch[UBIFS_MAX_BULK_READ];
void *buf;
int buf_len;
int gc_seq;
int cnt;
int blk_cnt;
int eof;
};
/**
* struct ubifs_node_range - node length range description data structure.
* @len: fixed node length
@@ -862,9 +893,13 @@ struct ubifs_orphan {
/**
* struct ubifs_mount_opts - UBIFS-specific mount options information.
* @unmount_mode: selected unmount mode (%0 default, %1 normal, %2 fast)
* @bulk_read: enable bulk-reads
* @chk_data_crc: check CRCs when reading data nodes
*/
struct ubifs_mount_opts {
unsigned int unmount_mode:2;
unsigned int bulk_read:2;
unsigned int chk_data_crc:2;
};
/**
@@ -905,13 +940,12 @@ struct ubifs_mount_opts {
* @cmt_state: commit state
* @cs_lock: commit state lock
* @cmt_wq: wait queue to sleep on if the log is full and a commit is running
*
* @fast_unmount: do not run journal commit before un-mounting
* @big_lpt: flag that LPT is too big to write whole during commit
* @check_lpt_free: flag that indicates LPT GC may be needed
* @nospace: non-zero if the file-system does not have flash space (used as
* optimization)
* @nospace_rp: the same as @nospace, but additionally means that even reserved
* pool is full
* @no_chk_data_crc: do not check CRCs when reading data nodes (except during
* recovery)
* @bulk_read: enable bulk-reads
*
* @tnc_mutex: protects the Tree Node Cache (TNC), @zroot, @cnext, @enext, and
* @calc_idx_sz
@@ -935,6 +969,7 @@ struct ubifs_mount_opts {
* @mst_node: master node
* @mst_offs: offset of valid master node
* @mst_mutex: protects the master node area, @mst_node, and @mst_offs
* @bulk_read_buf_size: buffer size for bulk-reads
*
* @log_lebs: number of logical eraseblocks in the log
* @log_bytes: log size in bytes
@@ -977,12 +1012,17 @@ struct ubifs_mount_opts {
* but which still have to be taken into account because
* the index has not been committed so far
* @space_lock: protects @budg_idx_growth, @budg_data_growth, @budg_dd_growth,
* @budg_uncommited_idx, @min_idx_lebs, @old_idx_sz, and @lst;
* @budg_uncommited_idx, @min_idx_lebs, @old_idx_sz, @lst,
* @nospace, and @nospace_rp;
* @min_idx_lebs: minimum number of LEBs required for the index
* @old_idx_sz: size of index on flash
* @calc_idx_sz: temporary variable which is used to calculate new index size
* (contains accurate new index size at end of TNC commit start)
* @lst: lprops statistics
* @nospace: non-zero if the file-system does not have flash space (used as
* optimization)
* @nospace_rp: the same as @nospace, but additionally means that even reserved
* pool is full
*
* @page_budget: budget for a page
* @inode_budget: budget for an inode
@@ -1061,6 +1101,7 @@ struct ubifs_mount_opts {
* @lpt_drty_flgs: dirty flags for LPT special nodes e.g. ltab
* @dirty_nn_cnt: number of dirty nnodes
* @dirty_pn_cnt: number of dirty pnodes
* @check_lpt_free: flag that indicates LPT GC may be needed
* @lpt_sz: LPT size
* @lpt_nod_buf: buffer for an on-flash nnode or pnode
* @lpt_buf: buffer of LEB size used by LPT
@@ -1102,6 +1143,7 @@ struct ubifs_mount_opts {
* @rcvrd_mst_node: recovered master node to write when mounting ro to rw
* @size_tree: inode size information for recovery
* @remounting_rw: set while remounting from ro to rw (sb flags have MS_RDONLY)
* @always_chk_crc: always check CRCs (while mounting and remounting rw)
* @mount_opts: UBIFS-specific mount options
*
* @dbg_buf: a buffer of LEB size used for debugging purposes
@@ -1146,11 +1188,11 @@ struct ubifs_info {
int cmt_state;
spinlock_t cs_lock;
wait_queue_head_t cmt_wq;
unsigned int fast_unmount:1;
unsigned int big_lpt:1;
unsigned int check_lpt_free:1;
unsigned int nospace:1;
unsigned int nospace_rp:1;
unsigned int no_chk_data_crc:1;
unsigned int bulk_read:1;
struct mutex tnc_mutex;
struct ubifs_zbranch zroot;
@@ -1175,6 +1217,7 @@ struct ubifs_info {
struct ubifs_mst_node *mst_node;
int mst_offs;
struct mutex mst_mutex;
int bulk_read_buf_size;
int log_lebs;
long long log_bytes;
@@ -1218,6 +1261,8 @@ struct ubifs_info {
unsigned long long old_idx_sz;
unsigned long long calc_idx_sz;
struct ubifs_lp_stats lst;
unsigned int nospace:1;
unsigned int nospace_rp:1;
int page_budget;
int inode_budget;
@@ -1294,6 +1339,7 @@ struct ubifs_info {
int lpt_drty_flgs;
int dirty_nn_cnt;
int dirty_pn_cnt;
int check_lpt_free;
long long lpt_sz;
void *lpt_nod_buf;
void *lpt_buf;
@@ -1335,6 +1381,7 @@ struct ubifs_info {
struct ubifs_mst_node *rcvrd_mst_node;
struct rb_root size_tree;
int remounting_rw;
int always_chk_crc;
struct ubifs_mount_opts mount_opts;
#ifdef CONFIG_UBIFS_FS_DEBUG
@@ -1347,6 +1394,12 @@ struct ubifs_info {
unsigned long fail_timeout;
unsigned int fail_cnt;
unsigned int fail_cnt_max;
long long chk_lpt_sz;
long long chk_lpt_sz2;
long long chk_lpt_wastage;
int chk_lpt_lebs;
int new_nhead_lnum;
int new_nhead_offs;
#endif
};
@@ -1377,7 +1430,7 @@ int ubifs_read_node_wbuf(struct ubifs_wbuf *wbuf, void *buf, int type, int len,
int ubifs_write_node(struct ubifs_info *c, void *node, int len, int lnum,
int offs, int dtype);
int ubifs_check_node(const struct ubifs_info *c, const void *buf, int lnum,
int offs, int quiet);
int offs, int quiet, int chk_crc);
void ubifs_prepare_node(struct ubifs_info *c, void *buf, int len, int pad);
void ubifs_prep_grp_node(struct ubifs_info *c, void *node, int len, int last);
int ubifs_io_init(struct ubifs_info *c);
@@ -1490,6 +1543,8 @@ void destroy_old_idx(struct ubifs_info *c);
int is_idx_node_in_tnc(struct ubifs_info *c, union ubifs_key *key, int level,
int lnum, int offs);
int insert_old_idx_znode(struct ubifs_info *c, struct ubifs_znode *znode);
int ubifs_tnc_get_bu_keys(struct ubifs_info *c, struct bu_info *bu);
int ubifs_tnc_bulk_read(struct ubifs_info *c, struct bu_info *bu);
/* tnc_misc.c */
struct ubifs_znode *ubifs_tnc_levelorder_next(struct ubifs_znode *zr,
@@ -1586,12 +1641,10 @@ int ubifs_lpt_post_commit(struct ubifs_info *c);
void ubifs_lpt_free(struct ubifs_info *c, int wr_only);
/* lprops.c */
void ubifs_get_lprops(struct ubifs_info *c);
const struct ubifs_lprops *ubifs_change_lp(struct ubifs_info *c,
const struct ubifs_lprops *lp,
int free, int dirty, int flags,
int idx_gc_cnt);
void ubifs_release_lprops(struct ubifs_info *c);
void ubifs_get_lp_stats(struct ubifs_info *c, struct ubifs_lp_stats *stats);
void ubifs_add_to_cat(struct ubifs_info *c, struct ubifs_lprops *lprops,
int cat);

2
fs/ubifs/xattr.c
View File

@@ -446,7 +446,7 @@ ssize_t ubifs_listxattr(struct dentry *dentry, char *buffer, size_t size)
int type;
xent = ubifs_tnc_next_ent(c, &key, &nm);
if (unlikely(IS_ERR(xent))) {
if (IS_ERR(xent)) {
err = PTR_ERR(xent);
break;
}