Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs

[linux.git] / fs / xfs / xfs_file.c

diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index c3f4289f64976c3630bec8ca9e44f63062ae99f4..79e96ce987331cad3aab2d0a7513ce19cad2fcb4 100644 (file)
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -824,7 +824,8 @@ xfs_file_fallocate(
 
        if (!S_ISREG(inode->i_mode))
                return -EINVAL;
-       if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE))
+       if (mode & ~(FALLOC_FL_KEEP_SIZE | FALLOC_FL_PUNCH_HOLE |
+                    FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZERO_RANGE))
                return -EOPNOTSUPP;
 
        xfs_ilock(ip, XFS_IOLOCK_EXCL);
@@ -832,6 +833,20 @@ xfs_file_fallocate(
                error = xfs_free_file_space(ip, offset, len);
                if (error)
                        goto out_unlock;
+       } else if (mode & FALLOC_FL_COLLAPSE_RANGE) {
+               unsigned blksize_mask = (1 << inode->i_blkbits) - 1;
+
+               if (offset & blksize_mask || len & blksize_mask) {
+                       error = -EINVAL;
+                       goto out_unlock;
+               }
+
+               ASSERT(offset + len < i_size_read(inode));
+               new_size = i_size_read(inode) - len;
+
+               error = xfs_collapse_file_space(ip, offset, len);
+               if (error)
+                       goto out_unlock;
        } else {
                if (!(mode & FALLOC_FL_KEEP_SIZE) &&
                    offset + len > i_size_read(inode)) {
@@ -841,8 +856,11 @@ xfs_file_fallocate(
                                goto out_unlock;
                }
 
-               error = xfs_alloc_file_space(ip, offset, len,
-                                            XFS_BMAPI_PREALLOC);
+               if (mode & FALLOC_FL_ZERO_RANGE)
+                       error = xfs_zero_file_space(ip, offset, len);
+               else
+                       error = xfs_alloc_file_space(ip, offset, len,
+                                                    XFS_BMAPI_PREALLOC);
                if (error)
                        goto out_unlock;
        }
@@ -860,7 +878,7 @@ xfs_file_fallocate(
        if (ip->i_d.di_mode & S_IXGRP)
                ip->i_d.di_mode &= ~S_ISGID;
 
-       if (!(mode & FALLOC_FL_PUNCH_HOLE))
+       if (!(mode & (FALLOC_FL_PUNCH_HOLE | FALLOC_FL_COLLAPSE_RANGE)))
                ip->i_d.di_flags |= XFS_DIFLAG_PREALLOC;
 
        xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
@@ -1466,6 +1484,7 @@ const struct file_operations xfs_dir_file_operations = {
 
 static const struct vm_operations_struct xfs_file_vm_ops = {
        .fault          = filemap_fault,
+       .map_pages      = filemap_map_pages,
        .page_mkwrite   = xfs_vm_page_mkwrite,
        .remap_pages    = generic_file_remap_pages,
 };