Commit 4cb03fec authored by Matthew Wilcox (Oracle)'s avatar Matthew Wilcox (Oracle) Committed by Jaegeuk Kim

f2fs: Simplify SEEK_DATA implementation

Instead of finding the first dirty page and then seeing if it matches
the index of a block that is NEW_ADDR, delay the lookup of the dirty
bit until we've actually found a block that's NEW_ADDR.
Signed-off-by: default avatarMatthew Wilcox (Oracle) <willy@infradead.org>
Reviewed-by: default avatarChao Yu <yuchao0@huawei.com>
Signed-off-by: default avatarJaegeuk Kim <jaegeuk@kernel.org>
parent 093749e2
...@@ -376,32 +376,15 @@ int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync) ...@@ -376,32 +376,15 @@ int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
return f2fs_do_sync_file(file, start, end, datasync, false); return f2fs_do_sync_file(file, start, end, datasync, false);
} }
static pgoff_t __get_first_dirty_index(struct address_space *mapping, static bool __found_offset(struct address_space *mapping, block_t blkaddr,
pgoff_t pgofs, int whence) pgoff_t index, int whence)
{
struct page *page;
int nr_pages;
if (whence != SEEK_DATA)
return 0;
/* find first dirty page index */
nr_pages = find_get_pages_tag(mapping, &pgofs, PAGECACHE_TAG_DIRTY,
1, &page);
if (!nr_pages)
return ULONG_MAX;
pgofs = page->index;
put_page(page);
return pgofs;
}
static bool __found_offset(struct f2fs_sb_info *sbi, block_t blkaddr,
pgoff_t dirty, pgoff_t pgofs, int whence)
{ {
switch (whence) { switch (whence) {
case SEEK_DATA: case SEEK_DATA:
if ((blkaddr == NEW_ADDR && dirty == pgofs) || if (__is_valid_data_blkaddr(blkaddr))
__is_valid_data_blkaddr(blkaddr)) return true;
if (blkaddr == NEW_ADDR &&
xa_get_mark(&mapping->i_pages, index, PAGECACHE_TAG_DIRTY))
return true; return true;
break; break;
case SEEK_HOLE: case SEEK_HOLE:
...@@ -417,7 +400,7 @@ static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence) ...@@ -417,7 +400,7 @@ static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence)
struct inode *inode = file->f_mapping->host; struct inode *inode = file->f_mapping->host;
loff_t maxbytes = inode->i_sb->s_maxbytes; loff_t maxbytes = inode->i_sb->s_maxbytes;
struct dnode_of_data dn; struct dnode_of_data dn;
pgoff_t pgofs, end_offset, dirty; pgoff_t pgofs, end_offset;
loff_t data_ofs = offset; loff_t data_ofs = offset;
loff_t isize; loff_t isize;
int err = 0; int err = 0;
...@@ -437,8 +420,6 @@ static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence) ...@@ -437,8 +420,6 @@ static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence)
pgofs = (pgoff_t)(offset >> PAGE_SHIFT); pgofs = (pgoff_t)(offset >> PAGE_SHIFT);
dirty = __get_first_dirty_index(inode->i_mapping, pgofs, whence);
for (; data_ofs < isize; data_ofs = (loff_t)pgofs << PAGE_SHIFT) { for (; data_ofs < isize; data_ofs = (loff_t)pgofs << PAGE_SHIFT) {
set_new_dnode(&dn, inode, NULL, NULL, 0); set_new_dnode(&dn, inode, NULL, NULL, 0);
err = f2fs_get_dnode_of_data(&dn, pgofs, LOOKUP_NODE); err = f2fs_get_dnode_of_data(&dn, pgofs, LOOKUP_NODE);
...@@ -471,7 +452,7 @@ static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence) ...@@ -471,7 +452,7 @@ static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence)
goto fail; goto fail;
} }
if (__found_offset(F2FS_I_SB(inode), blkaddr, dirty, if (__found_offset(file->f_mapping, blkaddr,
pgofs, whence)) { pgofs, whence)) {
f2fs_put_dnode(&dn); f2fs_put_dnode(&dn);
goto found; goto found;
......
Markdown is supported
0%
or
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment