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-rw-r--r--fs/ext4/ext4_extents.h9
-rw-r--r--fs/ext4/extents.c42
-rw-r--r--fs/ext4/inode.c2
-rw-r--r--fs/ext4/mballoc.c8
-rw-r--r--fs/ext4/move_extent.c10
-rw-r--r--fs/ext4/super.c15
6 files changed, 48 insertions, 38 deletions
diff --git a/fs/ext4/ext4_extents.h b/fs/ext4/ext4_extents.h
index 2e29abb30f76..095c36f3b612 100644
--- a/fs/ext4/ext4_extents.h
+++ b/fs/ext4/ext4_extents.h
@@ -125,7 +125,7 @@ struct ext4_ext_path {
* positive retcode - signal for ext4_ext_walk_space(), see below
* callback must return valid extent (passed or newly created)
*/
-typedef int (*ext_prepare_callback)(struct inode *, struct ext4_ext_path *,
+typedef int (*ext_prepare_callback)(struct inode *, ext4_lblk_t,
struct ext4_ext_cache *,
struct ext4_extent *, void *);
@@ -133,8 +133,11 @@ typedef int (*ext_prepare_callback)(struct inode *, struct ext4_ext_path *,
#define EXT_BREAK 1
#define EXT_REPEAT 2
-/* Maximum logical block in a file; ext4_extent's ee_block is __le32 */
-#define EXT_MAX_BLOCK 0xffffffff
+/*
+ * Maximum number of logical blocks in a file; ext4_extent's ee_block is
+ * __le32.
+ */
+#define EXT_MAX_BLOCKS 0xffffffff
/*
* EXT_INIT_MAX_LEN is the maximum number of blocks we can have in an
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 5199bac7fc62..f815cc81e7a2 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -1408,7 +1408,7 @@ got_index:
/*
* ext4_ext_next_allocated_block:
- * returns allocated block in subsequent extent or EXT_MAX_BLOCK.
+ * returns allocated block in subsequent extent or EXT_MAX_BLOCKS.
* NOTE: it considers block number from index entry as
* allocated block. Thus, index entries have to be consistent
* with leaves.
@@ -1422,7 +1422,7 @@ ext4_ext_next_allocated_block(struct ext4_ext_path *path)
depth = path->p_depth;
if (depth == 0 && path->p_ext == NULL)
- return EXT_MAX_BLOCK;
+ return EXT_MAX_BLOCKS;
while (depth >= 0) {
if (depth == path->p_depth) {
@@ -1439,12 +1439,12 @@ ext4_ext_next_allocated_block(struct ext4_ext_path *path)
depth--;
}
- return EXT_MAX_BLOCK;
+ return EXT_MAX_BLOCKS;
}
/*
* ext4_ext_next_leaf_block:
- * returns first allocated block from next leaf or EXT_MAX_BLOCK
+ * returns first allocated block from next leaf or EXT_MAX_BLOCKS
*/
static ext4_lblk_t ext4_ext_next_leaf_block(struct inode *inode,
struct ext4_ext_path *path)
@@ -1456,7 +1456,7 @@ static ext4_lblk_t ext4_ext_next_leaf_block(struct inode *inode,
/* zero-tree has no leaf blocks at all */
if (depth == 0)
- return EXT_MAX_BLOCK;
+ return EXT_MAX_BLOCKS;
/* go to index block */
depth--;
@@ -1469,7 +1469,7 @@ static ext4_lblk_t ext4_ext_next_leaf_block(struct inode *inode,
depth--;
}
- return EXT_MAX_BLOCK;
+ return EXT_MAX_BLOCKS;
}
/*
@@ -1677,13 +1677,13 @@ static unsigned int ext4_ext_check_overlap(struct inode *inode,
*/
if (b2 < b1) {
b2 = ext4_ext_next_allocated_block(path);
- if (b2 == EXT_MAX_BLOCK)
+ if (b2 == EXT_MAX_BLOCKS)
goto out;
}
/* check for wrap through zero on extent logical start block*/
if (b1 + len1 < b1) {
- len1 = EXT_MAX_BLOCK - b1;
+ len1 = EXT_MAX_BLOCKS - b1;
newext->ee_len = cpu_to_le16(len1);
ret = 1;
}
@@ -1767,7 +1767,7 @@ repeat:
fex = EXT_LAST_EXTENT(eh);
next = ext4_ext_next_leaf_block(inode, path);
if (le32_to_cpu(newext->ee_block) > le32_to_cpu(fex->ee_block)
- && next != EXT_MAX_BLOCK) {
+ && next != EXT_MAX_BLOCKS) {
ext_debug("next leaf block - %d\n", next);
BUG_ON(npath != NULL);
npath = ext4_ext_find_extent(inode, next, NULL);
@@ -1887,7 +1887,7 @@ static int ext4_ext_walk_space(struct inode *inode, ext4_lblk_t block,
BUG_ON(func == NULL);
BUG_ON(inode == NULL);
- while (block < last && block != EXT_MAX_BLOCK) {
+ while (block < last && block != EXT_MAX_BLOCKS) {
num = last - block;
/* find extent for this block */
down_read(&EXT4_I(inode)->i_data_sem);
@@ -1958,7 +1958,7 @@ static int ext4_ext_walk_space(struct inode *inode, ext4_lblk_t block,
err = -EIO;
break;
}
- err = func(inode, path, &cbex, ex, cbdata);
+ err = func(inode, next, &cbex, ex, cbdata);
ext4_ext_drop_refs(path);
if (err < 0)
@@ -2020,7 +2020,7 @@ ext4_ext_put_gap_in_cache(struct inode *inode, struct ext4_ext_path *path,
if (ex == NULL) {
/* there is no extent yet, so gap is [0;-] */
lblock = 0;
- len = EXT_MAX_BLOCK;
+ len = EXT_MAX_BLOCKS;
ext_debug("cache gap(whole file):");
} else if (block < le32_to_cpu(ex->ee_block)) {
lblock = block;
@@ -2350,7 +2350,7 @@ ext4_ext_rm_leaf(handle_t *handle, struct inode *inode,
* never happen because at least one of the end points
* needs to be on the edge of the extent.
*/
- if (end == EXT_MAX_BLOCK) {
+ if (end == EXT_MAX_BLOCKS - 1) {
ext_debug(" bad truncate %u:%u\n",
start, end);
block = 0;
@@ -2398,7 +2398,7 @@ ext4_ext_rm_leaf(handle_t *handle, struct inode *inode,
* If this is a truncate, this condition
* should never happen
*/
- if (end == EXT_MAX_BLOCK) {
+ if (end == EXT_MAX_BLOCKS - 1) {
ext_debug(" bad truncate %u:%u\n",
start, end);
err = -EIO;
@@ -2478,7 +2478,7 @@ ext4_ext_rm_leaf(handle_t *handle, struct inode *inode,
* we need to remove it from the leaf
*/
if (num == 0) {
- if (end != EXT_MAX_BLOCK) {
+ if (end != EXT_MAX_BLOCKS - 1) {
/*
* For hole punching, we need to scoot all the
* extents up when an extent is removed so that
@@ -3699,7 +3699,7 @@ void ext4_ext_truncate(struct inode *inode)
last_block = (inode->i_size + sb->s_blocksize - 1)
>> EXT4_BLOCK_SIZE_BITS(sb);
- err = ext4_ext_remove_space(inode, last_block, EXT_MAX_BLOCK);
+ err = ext4_ext_remove_space(inode, last_block, EXT_MAX_BLOCKS - 1);
/* In a multi-transaction truncate, we only make the final
* transaction synchronous.
@@ -3914,14 +3914,13 @@ int ext4_convert_unwritten_extents(struct inode *inode, loff_t offset,
/*
* Callback function called for each extent to gather FIEMAP information.
*/
-static int ext4_ext_fiemap_cb(struct inode *inode, struct ext4_ext_path *path,
+static int ext4_ext_fiemap_cb(struct inode *inode, ext4_lblk_t next,
struct ext4_ext_cache *newex, struct ext4_extent *ex,
void *data)
{
__u64 logical;
__u64 physical;
__u64 length;
- loff_t size;
__u32 flags = 0;
int ret = 0;
struct fiemap_extent_info *fieinfo = data;
@@ -4103,8 +4102,7 @@ found_delayed_extent:
if (ex && ext4_ext_is_uninitialized(ex))
flags |= FIEMAP_EXTENT_UNWRITTEN;
- size = i_size_read(inode);
- if (logical + length >= size)
+ if (next == EXT_MAX_BLOCKS)
flags |= FIEMAP_EXTENT_LAST;
ret = fiemap_fill_next_extent(fieinfo, logical, physical,
@@ -4347,8 +4345,8 @@ int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
start_blk = start >> inode->i_sb->s_blocksize_bits;
last_blk = (start + len - 1) >> inode->i_sb->s_blocksize_bits;
- if (last_blk >= EXT_MAX_BLOCK)
- last_blk = EXT_MAX_BLOCK-1;
+ if (last_blk >= EXT_MAX_BLOCKS)
+ last_blk = EXT_MAX_BLOCKS-1;
len_blks = ((ext4_lblk_t) last_blk) - start_blk + 1;
/*
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index a5763e3505ba..e3126c051006 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -2634,7 +2634,7 @@ static int ext4_writepage(struct page *page,
struct buffer_head *page_bufs = NULL;
struct inode *inode = page->mapping->host;
- trace_ext4_writepage(inode, page);
+ trace_ext4_writepage(page);
size = i_size_read(inode);
if (page->index == size >> PAGE_CACHE_SHIFT)
len = size & ~PAGE_CACHE_MASK;
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 859f2ae8864e..6ed859d56850 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -3578,8 +3578,8 @@ ext4_mb_release_inode_pa(struct ext4_buddy *e4b, struct buffer_head *bitmap_bh,
free += next - bit;
trace_ext4_mballoc_discard(sb, NULL, group, bit, next - bit);
- trace_ext4_mb_release_inode_pa(sb, pa->pa_inode, pa,
- grp_blk_start + bit, next - bit);
+ trace_ext4_mb_release_inode_pa(pa, grp_blk_start + bit,
+ next - bit);
mb_free_blocks(pa->pa_inode, e4b, bit, next - bit);
bit = next + 1;
}
@@ -3608,7 +3608,7 @@ ext4_mb_release_group_pa(struct ext4_buddy *e4b,
ext4_group_t group;
ext4_grpblk_t bit;
- trace_ext4_mb_release_group_pa(sb, pa);
+ trace_ext4_mb_release_group_pa(pa);
BUG_ON(pa->pa_deleted == 0);
ext4_get_group_no_and_offset(sb, pa->pa_pstart, &group, &bit);
BUG_ON(group != e4b->bd_group && pa->pa_len != 0);
@@ -4448,7 +4448,7 @@ ext4_mb_free_metadata(handle_t *handle, struct ext4_buddy *e4b,
* @inode: inode
* @block: start physical block to free
* @count: number of blocks to count
- * @metadata: Are these metadata blocks
+ * @flags: flags used by ext4_free_blocks
*/
void ext4_free_blocks(handle_t *handle, struct inode *inode,
struct buffer_head *bh, ext4_fsblk_t block,
diff --git a/fs/ext4/move_extent.c b/fs/ext4/move_extent.c
index 2b8304bf3c50..f57455a1b1b2 100644
--- a/fs/ext4/move_extent.c
+++ b/fs/ext4/move_extent.c
@@ -1002,12 +1002,12 @@ mext_check_arguments(struct inode *orig_inode,
return -EINVAL;
}
- if ((orig_start > EXT_MAX_BLOCK) ||
- (donor_start > EXT_MAX_BLOCK) ||
- (*len > EXT_MAX_BLOCK) ||
- (orig_start + *len > EXT_MAX_BLOCK)) {
+ if ((orig_start >= EXT_MAX_BLOCKS) ||
+ (donor_start >= EXT_MAX_BLOCKS) ||
+ (*len > EXT_MAX_BLOCKS) ||
+ (orig_start + *len >= EXT_MAX_BLOCKS)) {
ext4_debug("ext4 move extent: Can't handle over [%u] blocks "
- "[ino:orig %lu, donor %lu]\n", EXT_MAX_BLOCK,
+ "[ino:orig %lu, donor %lu]\n", EXT_MAX_BLOCKS,
orig_inode->i_ino, donor_inode->i_ino);
return -EINVAL;
}
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index cc5c157aa11d..9ea71aa864b3 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -2243,6 +2243,12 @@ static void ext4_orphan_cleanup(struct super_block *sb,
* in the vfs. ext4 inode has 48 bits of i_block in fsblock units,
* so that won't be a limiting factor.
*
+ * However there is other limiting factor. We do store extents in the form
+ * of starting block and length, hence the resulting length of the extent
+ * covering maximum file size must fit into on-disk format containers as
+ * well. Given that length is always by 1 unit bigger than max unit (because
+ * we count 0 as well) we have to lower the s_maxbytes by one fs block.
+ *
* Note, this does *not* consider any metadata overhead for vfs i_blocks.
*/
static loff_t ext4_max_size(int blkbits, int has_huge_files)
@@ -2264,10 +2270,13 @@ static loff_t ext4_max_size(int blkbits, int has_huge_files)
upper_limit <<= blkbits;
}
- /* 32-bit extent-start container, ee_block */
- res = 1LL << 32;
+ /*
+ * 32-bit extent-start container, ee_block. We lower the maxbytes
+ * by one fs block, so ee_len can cover the extent of maximum file
+ * size
+ */
+ res = (1LL << 32) - 1;
res <<= blkbits;
- res -= 1;
/* Sanity check against vm- & vfs- imposed limits */
if (res > upper_limit)
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-07 19:52:57 +0000