diff options
Diffstat (limited to 'fs/iomap/buffered-io.c')
| -rw-r--r-- | fs/iomap/buffered-io.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/fs/iomap/buffered-io.c b/fs/iomap/buffered-io.c index 8f9b54db3811..30df87ac8349 100644 --- a/fs/iomap/buffered-io.c +++ b/fs/iomap/buffered-io.c @@ -887,12 +887,19 @@ __iomap_read_page(struct inode *inode, loff_t offset) } static loff_t -iomap_dirty_actor(struct inode *inode, loff_t pos, loff_t length, void *data, +iomap_unshare_actor(struct inode *inode, loff_t pos, loff_t length, void *data, struct iomap *iomap) { long status = 0; ssize_t written = 0; + /* don't bother with blocks that are not shared to start with */ + if (!(iomap->flags & IOMAP_F_SHARED)) + return length; + /* don't bother with holes or unwritten extents */ + if (iomap->type == IOMAP_HOLE || iomap->type == IOMAP_UNWRITTEN) + return length; + do { struct page *page, *rpage; unsigned long offset; /* Offset into pagecache page */ @@ -932,14 +939,14 @@ iomap_dirty_actor(struct inode *inode, loff_t pos, loff_t length, void *data, } int -iomap_file_dirty(struct inode *inode, loff_t pos, loff_t len, +iomap_file_unshare(struct inode *inode, loff_t pos, loff_t len, const struct iomap_ops *ops) { loff_t ret; while (len) { ret = iomap_apply(inode, pos, len, IOMAP_WRITE, ops, NULL, - iomap_dirty_actor); + iomap_unshare_actor); if (ret <= 0) return ret; pos += ret; @@ -948,7 +955,7 @@ iomap_file_dirty(struct inode *inode, loff_t pos, loff_t len, return 0; } -EXPORT_SYMBOL_GPL(iomap_file_dirty); +EXPORT_SYMBOL_GPL(iomap_file_unshare); static int iomap_zero(struct inode *inode, loff_t pos, unsigned offset, unsigned bytes, struct iomap *iomap) |