Merge 4.14-rc4 into staging-next

We want the staging/iio fixes in here as well to handle merge issues.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

1 files changed, 21 insertions, 18 deletions

diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index ebdd0bd2b261..309e26c9dddb 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -58,7 +58,7 @@ xfs_zero_range(
         xfs_off_t               count,
         bool                    *did_zero)
 {
-        return iomap_zero_range(VFS_I(ip), pos, count, NULL, &xfs_iomap_ops);
+        return iomap_zero_range(VFS_I(ip), pos, count, did_zero, &xfs_iomap_ops);
 }
 
 int
@@ -377,8 +377,6 @@ restart:
          */
         spin_lock(&ip->i_flags_lock);
         if (iocb->ki_pos > i_size_read(inode)) {
-                bool    zero = false;
-
                 spin_unlock(&ip->i_flags_lock);
                 if (!drained_dio) {
                         if (*iolock == XFS_IOLOCK_SHARED) {
@@ -399,7 +397,7 @@ restart:
                         drained_dio = true;
                         goto restart;
                 }
-                error = xfs_zero_eof(ip, iocb->ki_pos, i_size_read(inode), &zero);
+                error = xfs_zero_eof(ip, iocb->ki_pos, i_size_read(inode), NULL);
                 if (error)
                         return error;
         } else
@@ -436,7 +434,6 @@ xfs_dio_write_end_io(
         struct inode            *inode = file_inode(iocb->ki_filp);
         struct xfs_inode        *ip = XFS_I(inode);
         loff_t                  offset = iocb->ki_pos;
-        bool                    update_size = false;
         int                     error = 0;
 
         trace_xfs_end_io_direct_write(ip, offset, size);
@@ -447,6 +444,21 @@ xfs_dio_write_end_io(
         if (size <= 0)
                 return size;
 
+        if (flags & IOMAP_DIO_COW) {
+                error = xfs_reflink_end_cow(ip, offset, size);
+                if (error)
+                        return error;
+        }
+
+        /*
+         * Unwritten conversion updates the in-core isize after extent
+         * conversion but before updating the on-disk size. Updating isize any
+         * earlier allows a racing dio read to find unwritten extents before
+         * they are converted.
+         */
+        if (flags & IOMAP_DIO_UNWRITTEN)
+                return xfs_iomap_write_unwritten(ip, offset, size, true);
+
         /*
          * We need to update the in-core inode size here so that we don't end up
          * with the on-disk inode size being outside the in-core inode size. We
@@ -461,20 +473,11 @@ xfs_dio_write_end_io(
         spin_lock(&ip->i_flags_lock);
         if (offset + size > i_size_read(inode)) {
                 i_size_write(inode, offset + size);
-                update_size = true;
-        }
-        spin_unlock(&ip->i_flags_lock);
-
-        if (flags & IOMAP_DIO_COW) {
-                error = xfs_reflink_end_cow(ip, offset, size);
-                if (error)
-                        return error;
-        }
-
-        if (flags & IOMAP_DIO_UNWRITTEN)
-                error = xfs_iomap_write_unwritten(ip, offset, size);
-        else if (update_size)
+                spin_unlock(&ip->i_flags_lock);
                 error = xfs_setfilesize(ip, offset, size);
+        } else {
+                spin_unlock(&ip->i_flags_lock);
+        }
 
         return error;
 }