#include <linux/fs.h>
#include <linux/time.h>
#include <linux/ext4_jbd2.h>
-#include <linux/jbd.h>
+#include <linux/jbd2.h>
#include <linux/highuid.h>
#include <linux/pagemap.h>
#include <linux/quotaops.h>
{
ext4_fsblk_t block;
- block = le32_to_cpu(ex->ee_start);
+ block = le32_to_cpu(ex->ee_start_lo);
block |= ((ext4_fsblk_t) le16_to_cpu(ex->ee_start_hi) << 31) << 1;
return block;
}
{
ext4_fsblk_t block;
- block = le32_to_cpu(ix->ei_leaf);
+ block = le32_to_cpu(ix->ei_leaf_lo);
block |= ((ext4_fsblk_t) le16_to_cpu(ix->ei_leaf_hi) << 31) << 1;
return block;
}
*/
static void ext4_ext_store_pblock(struct ext4_extent *ex, ext4_fsblk_t pb)
{
- ex->ee_start = cpu_to_le32((unsigned long) (pb & 0xffffffff));
+ ex->ee_start_lo = cpu_to_le32((unsigned long) (pb & 0xffffffff));
ex->ee_start_hi = cpu_to_le16((unsigned long) ((pb >> 31) >> 1) & 0xffff);
}
*/
static void ext4_idx_store_pblock(struct ext4_extent_idx *ix, ext4_fsblk_t pb)
{
- ix->ei_leaf = cpu_to_le32((unsigned long) (pb & 0xffffffff));
+ ix->ei_leaf_lo = cpu_to_le32((unsigned long) (pb & 0xffffffff));
ix->ei_leaf_hi = cpu_to_le16((unsigned long) ((pb >> 31) >> 1) & 0xffff);
}
-static int ext4_ext_check_header(const char *function, struct inode *inode,
- struct ext4_extent_header *eh)
-{
- const char *error_msg = NULL;
-
- if (unlikely(eh->eh_magic != EXT4_EXT_MAGIC)) {
- error_msg = "invalid magic";
- goto corrupted;
- }
- if (unlikely(eh->eh_max == 0)) {
- error_msg = "invalid eh_max";
- goto corrupted;
- }
- if (unlikely(le16_to_cpu(eh->eh_entries) > le16_to_cpu(eh->eh_max))) {
- error_msg = "invalid eh_entries";
- goto corrupted;
- }
- return 0;
-
-corrupted:
- ext4_error(inode->i_sb, function,
- "bad header in inode #%lu: %s - magic %x, "
- "entries %u, max %u, depth %u",
- inode->i_ino, error_msg, le16_to_cpu(eh->eh_magic),
- le16_to_cpu(eh->eh_entries), le16_to_cpu(eh->eh_max),
- le16_to_cpu(eh->eh_depth));
-
- return -EIO;
-}
-
static handle_t *ext4_ext_journal_restart(handle_t *handle, int needed)
{
int err;
return size;
}
+static int
+ext4_ext_max_entries(struct inode *inode, int depth)
+{
+ int max;
+
+ if (depth == ext_depth(inode)) {
+ if (depth == 0)
+ max = ext4_ext_space_root(inode);
+ else
+ max = ext4_ext_space_root_idx(inode);
+ } else {
+ if (depth == 0)
+ max = ext4_ext_space_block(inode);
+ else
+ max = ext4_ext_space_block_idx(inode);
+ }
+
+ return max;
+}
+
+static int __ext4_ext_check_header(const char *function, struct inode *inode,
+ struct ext4_extent_header *eh,
+ int depth)
+{
+ const char *error_msg;
+ int max = 0;
+
+ if (unlikely(eh->eh_magic != EXT4_EXT_MAGIC)) {
+ error_msg = "invalid magic";
+ goto corrupted;
+ }
+ if (unlikely(le16_to_cpu(eh->eh_depth) != depth)) {
+ error_msg = "unexpected eh_depth";
+ goto corrupted;
+ }
+ if (unlikely(eh->eh_max == 0)) {
+ error_msg = "invalid eh_max";
+ goto corrupted;
+ }
+ max = ext4_ext_max_entries(inode, depth);
+ if (unlikely(le16_to_cpu(eh->eh_max) > max)) {
+ error_msg = "too large eh_max";
+ goto corrupted;
+ }
+ if (unlikely(le16_to_cpu(eh->eh_entries) > le16_to_cpu(eh->eh_max))) {
+ error_msg = "invalid eh_entries";
+ goto corrupted;
+ }
+ return 0;
+
+corrupted:
+ ext4_error(inode->i_sb, function,
+ "bad header in inode #%lu: %s - magic %x, "
+ "entries %u, max %u(%u), depth %u(%u)",
+ inode->i_ino, error_msg, le16_to_cpu(eh->eh_magic),
+ le16_to_cpu(eh->eh_entries), le16_to_cpu(eh->eh_max),
+ max, le16_to_cpu(eh->eh_depth), depth);
+
+ return -EIO;
+}
+
+#define ext4_ext_check_header(inode, eh, depth) \
+ __ext4_ext_check_header(__FUNCTION__, inode, eh, depth)
+
#ifdef EXT_DEBUG
static void ext4_ext_show_path(struct inode *inode, struct ext4_ext_path *path)
{
/*
* ext4_ext_binsearch_idx:
* binary search for the closest index of the given block
+ * the header must be checked before calling this
*/
static void
ext4_ext_binsearch_idx(struct inode *inode, struct ext4_ext_path *path, int block)
struct ext4_extent_header *eh = path->p_hdr;
struct ext4_extent_idx *r, *l, *m;
- BUG_ON(eh->eh_magic != EXT4_EXT_MAGIC);
- BUG_ON(le16_to_cpu(eh->eh_entries) > le16_to_cpu(eh->eh_max));
- BUG_ON(le16_to_cpu(eh->eh_entries) <= 0);
ext_debug("binsearch for %d(idx): ", block);
l = EXT_FIRST_INDEX(eh) + 1;
- r = EXT_FIRST_INDEX(eh) + le16_to_cpu(eh->eh_entries) - 1;
+ r = EXT_LAST_INDEX(eh);
while (l <= r) {
m = l + (r - l) / 2;
if (block < le32_to_cpu(m->ei_block))
r = m - 1;
else
l = m + 1;
- ext_debug("%p(%u):%p(%u):%p(%u) ", l, l->ei_block,
- m, m->ei_block, r, r->ei_block);
+ ext_debug("%p(%u):%p(%u):%p(%u) ", l, le32_to_cpu(l->ei_block),
+ m, le32_to_cpu(m->ei_block),
+ r, le32_to_cpu(r->ei_block));
}
path->p_idx = l - 1;
ext_debug(" -> %d->%lld ", le32_to_cpu(path->p_idx->ei_block),
- idx_block(path->p_idx));
+ idx_pblock(path->p_idx));
#ifdef CHECK_BINSEARCH
{
/*
* ext4_ext_binsearch:
* binary search for closest extent of the given block
+ * the header must be checked before calling this
*/
static void
ext4_ext_binsearch(struct inode *inode, struct ext4_ext_path *path, int block)
struct ext4_extent_header *eh = path->p_hdr;
struct ext4_extent *r, *l, *m;
- BUG_ON(eh->eh_magic != EXT4_EXT_MAGIC);
- BUG_ON(le16_to_cpu(eh->eh_entries) > le16_to_cpu(eh->eh_max));
-
if (eh->eh_entries == 0) {
/*
* this leaf is empty:
ext_debug("binsearch for %d: ", block);
l = EXT_FIRST_EXTENT(eh) + 1;
- r = EXT_FIRST_EXTENT(eh) + le16_to_cpu(eh->eh_entries) - 1;
+ r = EXT_LAST_EXTENT(eh);
while (l <= r) {
m = l + (r - l) / 2;
r = m - 1;
else
l = m + 1;
- ext_debug("%p(%u):%p(%u):%p(%u) ", l, l->ee_block,
- m, m->ee_block, r, r->ee_block);
+ ext_debug("%p(%u):%p(%u):%p(%u) ", l, le32_to_cpu(l->ee_block),
+ m, le32_to_cpu(m->ee_block),
+ r, le32_to_cpu(r->ee_block));
}
path->p_ext = l - 1;
short int depth, i, ppos = 0, alloc = 0;
eh = ext_inode_hdr(inode);
- BUG_ON(eh == NULL);
- if (ext4_ext_check_header(__FUNCTION__, inode, eh))
+ depth = ext_depth(inode);
+ if (ext4_ext_check_header(inode, eh, depth))
return ERR_PTR(-EIO);
- i = depth = ext_depth(inode);
/* account possible depth increase */
if (!path) {
}
path[0].p_hdr = eh;
+ i = depth;
/* walk through the tree */
while (i) {
ext_debug("depth %d: num %d, max %d\n",
ppos, le16_to_cpu(eh->eh_entries), le16_to_cpu(eh->eh_max));
+
ext4_ext_binsearch_idx(inode, path + ppos, block);
path[ppos].p_block = idx_pblock(path[ppos].p_idx);
path[ppos].p_depth = i;
path[ppos].p_hdr = eh;
i--;
- if (ext4_ext_check_header(__FUNCTION__, inode, eh))
+ if (ext4_ext_check_header(inode, eh, i))
goto err;
}
path[ppos].p_ext = NULL;
path[ppos].p_idx = NULL;
- if (ext4_ext_check_header(__FUNCTION__, inode, eh))
- goto err;
-
/* find extent */
ext4_ext_binsearch(inode, path + ppos, block);
if (curp->p_idx != EXT_LAST_INDEX(curp->p_hdr)) {
len = (len - 1) * sizeof(struct ext4_extent_idx);
len = len < 0 ? 0 : len;
- ext_debug("insert new index %d after: %d. "
+ ext_debug("insert new index %d after: %llu. "
"move %d from 0x%p to 0x%p\n",
logical, ptr, len,
(curp->p_idx + 1), (curp->p_idx + 2));
/* insert before */
len = len * sizeof(struct ext4_extent_idx);
len = len < 0 ? 0 : len;
- ext_debug("insert new index %d before: %d. "
+ ext_debug("insert new index %d before: %llu. "
"move %d from 0x%p to 0x%p\n",
logical, ptr, len,
curp->p_idx, (curp->p_idx + 1));
BUG_ON(EXT_MAX_INDEX(path[i].p_hdr) !=
EXT_LAST_INDEX(path[i].p_hdr));
while (path[i].p_idx <= EXT_MAX_INDEX(path[i].p_hdr)) {
- ext_debug("%d: move %d:%d in new index %llu\n", i,
+ ext_debug("%d: move %d:%llu in new index %llu\n", i,
le32_to_cpu(path[i].p_idx->ei_block),
idx_pblock(path[i].p_idx),
newblock);
curp->p_hdr->eh_max = cpu_to_le16(ext4_ext_space_root_idx(inode));
curp->p_hdr->eh_entries = cpu_to_le16(1);
curp->p_idx = EXT_FIRST_INDEX(curp->p_hdr);
- /* FIXME: it works, but actually path[0] can be index */
- curp->p_idx->ei_block = EXT_FIRST_EXTENT(path[0].p_hdr)->ee_block;
+
+ if (path[0].p_hdr->eh_depth)
+ curp->p_idx->ei_block =
+ EXT_FIRST_INDEX(path[0].p_hdr)->ei_block;
+ else
+ curp->p_idx->ei_block =
+ EXT_FIRST_EXTENT(path[0].p_hdr)->ee_block;
ext4_idx_store_pblock(curp->p_idx, newblock);
neh = ext_inode_hdr(inode);
eh->eh_entries = cpu_to_le16(le16_to_cpu(eh->eh_entries)+1);
nearex = path[depth].p_ext;
nearex->ee_block = newext->ee_block;
- nearex->ee_start = newext->ee_start;
- nearex->ee_start_hi = newext->ee_start_hi;
+ ext4_ext_store_pblock(nearex, ext_pblock(newext));
nearex->ee_len = newext->ee_len;
merge:
static void
ext4_ext_put_in_cache(struct inode *inode, __u32 block,
- __u32 len, __u32 start, int type)
+ __u32 len, ext4_fsblk_t start, int type)
{
struct ext4_ext_cache *cex;
BUG_ON(len == 0);
unsigned uninitialized = 0;
struct ext4_extent *ex;
+ /* the header must be checked already in ext4_ext_remove_space() */
ext_debug("truncate since %lu in leaf\n", start);
if (!path[depth].p_hdr)
path[depth].p_hdr = ext_block_hdr(path[depth].p_bh);
eh = path[depth].p_hdr;
BUG_ON(eh == NULL);
- BUG_ON(le16_to_cpu(eh->eh_entries) > le16_to_cpu(eh->eh_max));
- BUG_ON(eh->eh_magic != EXT4_EXT_MAGIC);
/* find where to start removing */
ex = EXT_LAST_EXTENT(eh);
return -ENOMEM;
}
path[0].p_hdr = ext_inode_hdr(inode);
- if (ext4_ext_check_header(__FUNCTION__, inode, path[0].p_hdr)) {
+ if (ext4_ext_check_header(inode, path[0].p_hdr, depth)) {
err = -EIO;
goto out;
}
if (!path[i].p_hdr) {
ext_debug("initialize header\n");
path[i].p_hdr = ext_block_hdr(path[i].p_bh);
- if (ext4_ext_check_header(__FUNCTION__, inode,
- path[i].p_hdr)) {
- err = -EIO;
- goto out;
- }
}
- BUG_ON(le16_to_cpu(path[i].p_hdr->eh_entries)
- > le16_to_cpu(path[i].p_hdr->eh_max));
- BUG_ON(path[i].p_hdr->eh_magic != EXT4_EXT_MAGIC);
-
if (!path[i].p_idx) {
/* this level hasn't been touched yet */
path[i].p_idx = EXT_LAST_INDEX(path[i].p_hdr);
i, EXT_FIRST_INDEX(path[i].p_hdr),
path[i].p_idx);
if (ext4_ext_more_to_rm(path + i)) {
+ struct buffer_head *bh;
/* go to the next level */
ext_debug("move to level %d (block %llu)\n",
i + 1, idx_pblock(path[i].p_idx));
memset(path + i + 1, 0, sizeof(*path));
- path[i+1].p_bh =
- sb_bread(sb, idx_pblock(path[i].p_idx));
- if (!path[i+1].p_bh) {
+ bh = sb_bread(sb, idx_pblock(path[i].p_idx));
+ if (!bh) {
/* should we reset i_size? */
err = -EIO;
break;
}
+ if (WARN_ON(i + 1 > depth)) {
+ err = -EIO;
+ break;
+ }
+ if (ext4_ext_check_header(inode, ext_block_hdr(bh),
+ depth - i - 1)) {
+ err = -EIO;
+ break;
+ }
+ path[i + 1].p_bh = bh;
/* save actual number of indexes since this
* number is changed at the next iteration */
}
/* ex2: iblock to iblock + maxblocks-1 : initialised */
ex2->ee_block = cpu_to_le32(iblock);
- ex2->ee_start = cpu_to_le32(newblock);
ext4_ext_store_pblock(ex2, newblock);
ex2->ee_len = cpu_to_le16(allocated);
if (ex2 != ex)
projects / linux-2.6 / blobdiff