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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
commit 396b122f6a
21 changed files with 1187 additions and 167 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
Documentation/filesystems/ubifs.txt
View File

@ -86,6 +86,15 @@ norm_unmount (*) commit on unmount; the journal is committed
fast_unmount do not commit on unmount; this option makes
unmount faster, but the next mount slower
because of the need to replay the journal.
bulk_read read more in one go to take advantage of flash
media that read faster sequentially
no_bulk_read (*) do not bulk-read
no_chk_data_crc skip checking of CRCs on data nodes in order to
improve read performance. Use this option only
if the flash media is highly reliable. The effect
of this option is that corruption of the contents
of a file can go unnoticed.
chk_data_crc (*) do not skip checking CRCs on data nodes
Quick usage instructions

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;
}