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NTFS: Enable ATTR_SIZE attribute changes in ntfs_setattr(). This completes 

the initial implementation of file truncation.  Now both open(2)ing
      a file with the O_TRUNC flag and the {,f}truncate(2) system calls
      will resize a file appropriately.  The limitations are that only
      uncompressed and unencrypted files are supported.  Also, there is
      only very limited support for highly fragmented files (the ones whose
      $DATA attribute is split into multiple attribute extents).

Signed-off-by: Anton Altaparmakov <aia21@cantab.net>
This commit is contained in:
Anton Altaparmakov 2005-10-04 16:01:06 +01:00
parent dd072330d1
commit e9438250b6
2 changed files with 22 additions and 8 deletions
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7
fs/ntfs/ChangeLog
View File

@ -50,6 +50,13 @@ ToDo/Notes:
but not the initialized size can be extended, too. but not the initialized size can be extended, too.
- Implement fs/ntfs/inode.[hc]::ntfs_truncate(). It only supports - Implement fs/ntfs/inode.[hc]::ntfs_truncate(). It only supports
uncompressed and unencrypted files. uncompressed and unencrypted files.
- Enable ATTR_SIZE attribute changes in ntfs_setattr(). This completes
the initial implementation of file truncation. Now both open(2)ing
a file with the O_TRUNC flag and the {,f}truncate(2) system calls
will resize a file appropriately. The limitations are that only
uncompressed and unencrypted files are supported. Also, there is
only very limited support for highly fragmented files (the ones whose
$DATA attribute is split into multiple attribute extents).
2.1.24 - Lots of bug fixes and support more clean journal states. 2.1.24 - Lots of bug fixes and support more clean journal states.

23
fs/ntfs/inode.c
View File

@ -2845,8 +2845,7 @@ int ntfs_setattr(struct dentry *dentry, struct iattr *attr)
err = inode_change_ok(vi, attr); err = inode_change_ok(vi, attr);
if (err) if (err)
return err; goto out;
/* We do not support NTFS ACLs yet. */ /* We do not support NTFS ACLs yet. */
if (ia_valid & (ATTR_UID | ATTR_GID | ATTR_MODE)) { if (ia_valid & (ATTR_UID | ATTR_GID | ATTR_MODE)) {
ntfs_warning(vi->i_sb, "Changes in user/group/mode are not " ntfs_warning(vi->i_sb, "Changes in user/group/mode are not "
@ -2854,14 +2853,22 @@ int ntfs_setattr(struct dentry *dentry, struct iattr *attr)
err = -EOPNOTSUPP; err = -EOPNOTSUPP;
goto out; goto out;
} }
if (ia_valid & ATTR_SIZE) { if (ia_valid & ATTR_SIZE) {
if (attr->ia_size != i_size_read(vi)) { if (attr->ia_size != i_size_read(vi)) {
ntfs_warning(vi->i_sb, "Changes in inode size are not " ntfs_inode *ni = NTFS_I(vi);
"supported yet, ignoring."); /*
err = -EOPNOTSUPP; * FIXME: For now we do not support resizing of
// TODO: Implement... * compressed or encrypted files yet.
// err = vmtruncate(vi, attr->ia_size); */
if (NInoCompressed(ni) || NInoEncrypted(ni)) {
ntfs_warning(vi->i_sb, "Changes in inode size "
"are not supported yet for "
"%s files, ignoring.",
NInoCompressed(ni) ?
"compressed" : "encrypted");
err = -EOPNOTSUPP;
} else
err = vmtruncate(vi, attr->ia_size);
if (err || ia_valid == ATTR_SIZE) if (err || ia_valid == ATTR_SIZE)
goto out; goto out;
} else { } else {