diff options
Diffstat (limited to 'fs/ext4/extents.c')
| -rw-r--r-- | fs/ext4/extents.c | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c index 92ad64b89d9b..8c99e591f797 100644 --- a/fs/ext4/extents.c +++ b/fs/ext4/extents.c @@ -29,6 +29,7 @@ #include <linux/fiemap.h> #include <linux/backing-dev.h> #include <linux/iomap.h> +#include <linux/dax.h> #include "ext4_jbd2.h" #include "ext4_extents.h" #include "xattr.h" @@ -4678,6 +4679,26 @@ long ext4_fallocate(struct file *file, int mode, loff_t offset, loff_t len) } if (mode & FALLOC_FL_ZERO_RANGE) { + /* + * If the file is in DAX mode, try to use a DAX-specific + * function to zero the region. + */ + if (IS_DAX(inode)) { + bool did_zeroout = false; + + inode_lock(inode); + + ret = dax_zeroinit_range(inode, offset, len, + &did_zeroout, &ext4_iomap_report_ops); + if (ret == -EINVAL) + ret = 0; + if (ret || did_zeroout) { + max_blocks = 0; + goto out; + } + + inode_unlock(inode); + } ret = ext4_zero_range(file, offset, len, mode); goto exit; } |