#include <linux/slab.h>
#include <linux/falloc.h>
#include <asm/uaccess.h>
+#include <linux/fiemap.h>
#include "ext4_jbd2.h"
#include "ext4_extents.h"
{
int err;
+ if (!ext4_handle_valid(handle))
+ return 0;
if (handle->h_buffer_credits > needed)
return 0;
err = ext4_journal_extend(handle, needed);
int err;
if (path->p_bh) {
/* path points to block */
- err = ext4_journal_dirty_metadata(handle, path->p_bh);
+ err = ext4_handle_dirty_metadata(handle, inode, path->p_bh);
} else {
/* path points to leaf/index in inode body */
err = ext4_mark_inode_dirty(handle, inode);
ext4_fsblk_t goal, newblock;
goal = ext4_ext_find_goal(inode, path, le32_to_cpu(ex->ee_block));
- newblock = ext4_new_meta_block(handle, inode, goal, err);
+ newblock = ext4_new_meta_blocks(handle, inode, goal, NULL, err);
return newblock;
}
ext_debug("\n");
}
#else
-#define ext4_ext_show_path(inode,path)
-#define ext4_ext_show_leaf(inode,path)
+#define ext4_ext_show_path(inode, path)
+#define ext4_ext_show_leaf(inode, path)
#endif
void ext4_ext_drop_refs(struct ext4_ext_path *path)
set_buffer_uptodate(bh);
unlock_buffer(bh);
- err = ext4_journal_dirty_metadata(handle, bh);
+ err = ext4_handle_dirty_metadata(handle, inode, bh);
if (err)
goto cleanup;
brelse(bh);
set_buffer_uptodate(bh);
unlock_buffer(bh);
- err = ext4_journal_dirty_metadata(handle, bh);
+ err = ext4_handle_dirty_metadata(handle, inode, bh);
if (err)
goto cleanup;
brelse(bh);
set_buffer_uptodate(bh);
unlock_buffer(bh);
- err = ext4_journal_dirty_metadata(handle, bh);
+ err = ext4_handle_dirty_metadata(handle, inode, bh);
if (err)
goto out;
while (--depth >= 0) {
ix = path[depth].p_idx;
if (ix != EXT_LAST_INDEX(path[depth].p_hdr))
- break;
+ goto got_index;
}
- if (depth < 0) {
- /* we've gone up to the root and
- * found no index to the right */
- return 0;
- }
+ /* we've gone up to the root and found no index to the right */
+ return 0;
+got_index:
/* we've found index to the right, let's
* follow it and find the closest allocated
* block to the right */
*phys = ext_pblock(ex);
put_bh(bh);
return 0;
-
}
/*
struct ext4_ext_path *path,
struct ext4_extent *newext)
{
- struct ext4_extent_header * eh;
+ struct ext4_extent_header *eh;
struct ext4_extent *ex, *fex;
struct ext4_extent *nearex; /* nearest extent */
struct ext4_ext_path *npath = NULL;
ext4_ext_drop_refs(npath);
kfree(npath);
}
- ext4_ext_tree_changed(inode);
ext4_ext_invalidate_cache(inode);
return err;
}
+int ext4_ext_walk_space(struct inode *inode, ext4_lblk_t block,
+ ext4_lblk_t num, ext_prepare_callback func,
+ void *cbdata)
+{
+ struct ext4_ext_path *path = NULL;
+ struct ext4_ext_cache cbex;
+ struct ext4_extent *ex;
+ ext4_lblk_t next, start = 0, end = 0;
+ ext4_lblk_t last = block + num;
+ int depth, exists, err = 0;
+
+ BUG_ON(func == NULL);
+ BUG_ON(inode == NULL);
+
+ while (block < last && block != EXT_MAX_BLOCK) {
+ num = last - block;
+ /* find extent for this block */
+ path = ext4_ext_find_extent(inode, block, path);
+ if (IS_ERR(path)) {
+ err = PTR_ERR(path);
+ path = NULL;
+ break;
+ }
+
+ depth = ext_depth(inode);
+ BUG_ON(path[depth].p_hdr == NULL);
+ ex = path[depth].p_ext;
+ next = ext4_ext_next_allocated_block(path);
+
+ exists = 0;
+ if (!ex) {
+ /* there is no extent yet, so try to allocate
+ * all requested space */
+ start = block;
+ end = block + num;
+ } else if (le32_to_cpu(ex->ee_block) > block) {
+ /* need to allocate space before found extent */
+ start = block;
+ end = le32_to_cpu(ex->ee_block);
+ if (block + num < end)
+ end = block + num;
+ } else if (block >= le32_to_cpu(ex->ee_block)
+ + ext4_ext_get_actual_len(ex)) {
+ /* need to allocate space after found extent */
+ start = block;
+ end = block + num;
+ if (end >= next)
+ end = next;
+ } else if (block >= le32_to_cpu(ex->ee_block)) {
+ /*
+ * some part of requested space is covered
+ * by found extent
+ */
+ start = block;
+ end = le32_to_cpu(ex->ee_block)
+ + ext4_ext_get_actual_len(ex);
+ if (block + num < end)
+ end = block + num;
+ exists = 1;
+ } else {
+ BUG();
+ }
+ BUG_ON(end <= start);
+
+ if (!exists) {
+ cbex.ec_block = start;
+ cbex.ec_len = end - start;
+ cbex.ec_start = 0;
+ cbex.ec_type = EXT4_EXT_CACHE_GAP;
+ } else {
+ cbex.ec_block = le32_to_cpu(ex->ee_block);
+ cbex.ec_len = ext4_ext_get_actual_len(ex);
+ cbex.ec_start = ext_pblock(ex);
+ cbex.ec_type = EXT4_EXT_CACHE_EXTENT;
+ }
+
+ BUG_ON(cbex.ec_len == 0);
+ err = func(inode, path, &cbex, ex, cbdata);
+ ext4_ext_drop_refs(path);
+
+ if (err < 0)
+ break;
+
+ if (err == EXT_REPEAT)
+ continue;
+ else if (err == EXT_BREAK) {
+ err = 0;
+ break;
+ }
+
+ if (ext_depth(inode) != depth) {
+ /* depth was changed. we have to realloc path */
+ kfree(path);
+ path = NULL;
+ }
+
+ block = cbex.ec_block + cbex.ec_len;
+ }
+
+ if (path) {
+ ext4_ext_drop_refs(path);
+ kfree(path);
+ }
+
+ return err;
+}
+
static void
ext4_ext_put_in_cache(struct inode *inode, ext4_lblk_t block,
__u32 len, ext4_fsblk_t start, int type)
}
}
out:
- ext4_ext_tree_changed(inode);
ext4_ext_drop_refs(path);
kfree(path);
ext4_journal_stop(handle);
* possible initialization would be here
*/
- if (test_opt(sb, EXTENTS)) {
+ if (EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS)) {
printk(KERN_INFO "EXT4-fs: file extents enabled");
#ifdef AGGRESSIVE_TEST
printk(", aggressive tests");
*/
void ext4_ext_release(struct super_block *sb)
{
- if (!test_opt(sb, EXTENTS))
+ if (!EXT4_HAS_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_EXTENTS))
return;
#ifdef EXTENTS_STATS
struct inode *inode,
struct ext4_ext_path *path,
ext4_lblk_t iblock,
- unsigned long max_blocks)
+ unsigned int max_blocks)
{
struct ext4_extent *ex, newex, orig_ex;
struct ext4_extent *ex1 = NULL;
*/
newdepth = ext_depth(inode);
/*
- * update the extent length after successfull insert of the
+ * update the extent length after successful insert of the
* split extent
*/
orig_ex.ee_len = cpu_to_le16(ee_len -
*/
int ext4_ext_get_blocks(handle_t *handle, struct inode *inode,
ext4_lblk_t iblock,
- unsigned long max_blocks, struct buffer_head *bh_result,
+ unsigned int max_blocks, struct buffer_head *bh_result,
int create, int extend_disksize)
{
struct ext4_ext_path *path = NULL;
struct ext4_extent_header *eh;
struct ext4_extent newex, *ex;
- ext4_fsblk_t goal, newblock;
- int err = 0, depth, ret;
- unsigned long allocated = 0;
+ ext4_fsblk_t newblock;
+ int err = 0, depth, ret, cache_type;
+ unsigned int allocated = 0;
struct ext4_allocation_request ar;
loff_t disksize;
__clear_bit(BH_New, &bh_result->b_state);
- ext_debug("blocks %u/%lu requested for inode %u\n",
+ ext_debug("blocks %u/%u requested for inode %u\n",
iblock, max_blocks, inode->i_ino);
/* check in cache */
- goal = ext4_ext_in_cache(inode, iblock, &newex);
- if (goal) {
- if (goal == EXT4_EXT_CACHE_GAP) {
+ cache_type = ext4_ext_in_cache(inode, iblock, &newex);
+ if (cache_type) {
+ if (cache_type == EXT4_EXT_CACHE_GAP) {
if (!create) {
/*
* block isn't allocated yet and
goto out2;
}
/* we should allocate requested block */
- } else if (goal == EXT4_EXT_CACHE_EXTENT) {
+ } else if (cache_type == EXT4_EXT_CACHE_EXTENT) {
/* block is already allocated */
newblock = iblock
- le32_to_cpu(newex.ee_block)
goto out2;
}
/*
- * Okay, we need to do block allocation. Lazily initialize the block
- * allocation info here if necessary.
+ * Okay, we need to do block allocation.
*/
- if (S_ISREG(inode->i_mode) && (!EXT4_I(inode)->i_block_alloc_info))
- ext4_init_block_alloc_info(inode);
/* find neighbour allocated blocks */
ar.lleft = iblock;
if (!newblock)
goto out2;
ext_debug("allocate new block: goal %llu, found %llu/%lu\n",
- goal, newblock, allocated);
+ ar.goal, newblock, allocated);
/* try to insert new extent into found leaf and return */
ext4_ext_store_pblock(&newex, newblock);
/* free data blocks we just allocated */
/* not a good idea to call discard here directly,
* but otherwise we'd need to call it every free() */
- ext4_mb_discard_inode_preallocations(inode);
+ ext4_discard_preallocations(inode);
ext4_free_blocks(handle, inode, ext_pblock(&newex),
ext4_ext_get_actual_len(&newex), 0);
goto out2;
down_write(&EXT4_I(inode)->i_data_sem);
ext4_ext_invalidate_cache(inode);
- ext4_discard_reservation(inode);
+ ext4_discard_preallocations(inode);
/*
* TODO: optimization is possible here.
* transaction synchronous.
*/
if (IS_SYNC(inode))
- handle->h_sync = 1;
+ ext4_handle_sync(handle);
out_stop:
up_write(&EXT4_I(inode)->i_data_sem);
* Update only when preallocation was requested beyond
* the file size.
*/
- if (!(mode & FALLOC_FL_KEEP_SIZE) &&
- new_size > i_size_read(inode)) {
- i_size_write(inode, new_size);
- EXT4_I(inode)->i_disksize = new_size;
+ if (!(mode & FALLOC_FL_KEEP_SIZE)) {
+ if (new_size > i_size_read(inode))
+ i_size_write(inode, new_size);
+ if (new_size > EXT4_I(inode)->i_disksize)
+ ext4_update_i_disksize(inode, new_size);
}
}
handle_t *handle;
ext4_lblk_t block;
loff_t new_size;
- unsigned long max_blocks;
+ unsigned int max_blocks;
int ret = 0;
int ret2 = 0;
int retries = 0;
WARN_ON(ret <= 0);
printk(KERN_ERR "%s: ext4_ext_get_blocks "
"returned error inode#%lu, block=%u, "
- "max_blocks=%lu", __func__,
+ "max_blocks=%u", __func__,
inode->i_ino, block, max_blocks);
#endif
ext4_mark_inode_dirty(handle, inode);
mutex_unlock(&inode->i_mutex);
return ret > 0 ? ret2 : ret;
}
+
+/*
+ * Callback function called for each extent to gather FIEMAP information.
+ */
+static int ext4_ext_fiemap_cb(struct inode *inode, struct ext4_ext_path *path,
+ struct ext4_ext_cache *newex, struct ext4_extent *ex,
+ void *data)
+{
+ struct fiemap_extent_info *fieinfo = data;
+ unsigned long blksize_bits = inode->i_sb->s_blocksize_bits;
+ __u64 logical;
+ __u64 physical;
+ __u64 length;
+ __u32 flags = 0;
+ int error;
+
+ logical = (__u64)newex->ec_block << blksize_bits;
+
+ if (newex->ec_type == EXT4_EXT_CACHE_GAP) {
+ pgoff_t offset;
+ struct page *page;
+ struct buffer_head *bh = NULL;
+
+ offset = logical >> PAGE_SHIFT;
+ page = find_get_page(inode->i_mapping, offset);
+ if (!page || !page_has_buffers(page))
+ return EXT_CONTINUE;
+
+ bh = page_buffers(page);
+
+ if (!bh)
+ return EXT_CONTINUE;
+
+ if (buffer_delay(bh)) {
+ flags |= FIEMAP_EXTENT_DELALLOC;
+ page_cache_release(page);
+ } else {
+ page_cache_release(page);
+ return EXT_CONTINUE;
+ }
+ }
+
+ physical = (__u64)newex->ec_start << blksize_bits;
+ length = (__u64)newex->ec_len << blksize_bits;
+
+ if (ex && ext4_ext_is_uninitialized(ex))
+ flags |= FIEMAP_EXTENT_UNWRITTEN;
+
+ /*
+ * If this extent reaches EXT_MAX_BLOCK, it must be last.
+ *
+ * Or if ext4_ext_next_allocated_block is EXT_MAX_BLOCK,
+ * this also indicates no more allocated blocks.
+ *
+ * XXX this might miss a single-block extent at EXT_MAX_BLOCK
+ */
+ if (logical + length - 1 == EXT_MAX_BLOCK ||
+ ext4_ext_next_allocated_block(path) == EXT_MAX_BLOCK)
+ flags |= FIEMAP_EXTENT_LAST;
+
+ error = fiemap_fill_next_extent(fieinfo, logical, physical,
+ length, flags);
+ if (error < 0)
+ return error;
+ if (error == 1)
+ return EXT_BREAK;
+
+ return EXT_CONTINUE;
+}
+
+/* fiemap flags we can handle specified here */
+#define EXT4_FIEMAP_FLAGS (FIEMAP_FLAG_SYNC|FIEMAP_FLAG_XATTR)
+
+static int ext4_xattr_fiemap(struct inode *inode,
+ struct fiemap_extent_info *fieinfo)
+{
+ __u64 physical = 0;
+ __u64 length;
+ __u32 flags = FIEMAP_EXTENT_LAST;
+ int blockbits = inode->i_sb->s_blocksize_bits;
+ int error = 0;
+
+ /* in-inode? */
+ if (EXT4_I(inode)->i_state & EXT4_STATE_XATTR) {
+ struct ext4_iloc iloc;
+ int offset; /* offset of xattr in inode */
+
+ error = ext4_get_inode_loc(inode, &iloc);
+ if (error)
+ return error;
+ physical = iloc.bh->b_blocknr << blockbits;
+ offset = EXT4_GOOD_OLD_INODE_SIZE +
+ EXT4_I(inode)->i_extra_isize;
+ physical += offset;
+ length = EXT4_SB(inode->i_sb)->s_inode_size - offset;
+ flags |= FIEMAP_EXTENT_DATA_INLINE;
+ } else { /* external block */
+ physical = EXT4_I(inode)->i_file_acl << blockbits;
+ length = inode->i_sb->s_blocksize;
+ }
+
+ if (physical)
+ error = fiemap_fill_next_extent(fieinfo, 0, physical,
+ length, flags);
+ return (error < 0 ? error : 0);
+}
+
+int ext4_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
+ __u64 start, __u64 len)
+{
+ ext4_lblk_t start_blk;
+ ext4_lblk_t len_blks;
+ int error = 0;
+
+ /* fallback to generic here if not in extents fmt */
+ if (!(EXT4_I(inode)->i_flags & EXT4_EXTENTS_FL))
+ return generic_block_fiemap(inode, fieinfo, start, len,
+ ext4_get_block);
+
+ if (fiemap_check_flags(fieinfo, EXT4_FIEMAP_FLAGS))
+ return -EBADR;
+
+ if (fieinfo->fi_flags & FIEMAP_FLAG_XATTR) {
+ error = ext4_xattr_fiemap(inode, fieinfo);
+ } else {
+ start_blk = start >> inode->i_sb->s_blocksize_bits;
+ len_blks = len >> inode->i_sb->s_blocksize_bits;
+
+ /*
+ * Walk the extent tree gathering extent information.
+ * ext4_ext_fiemap_cb will push extents back to user.
+ */
+ down_write(&EXT4_I(inode)->i_data_sem);
+ error = ext4_ext_walk_space(inode, start_blk, len_blks,
+ ext4_ext_fiemap_cb, fieinfo);
+ up_write(&EXT4_I(inode)->i_data_sem);
+ }
+
+ return error;
+}
+
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