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vfs: Add IOP_XATTR inode operations flag

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The IOP_XATTR inode operations flag in inode->i_opflags indicates that
the inode has xattr support.  The flag is automatically set by
new_inode() on filesystems with xattr support (where sb->s_xattr is
defined), and cleared otherwise.  Filesystems can explicitly clear it
for inodes that should not have xattr support.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Andreas Gruenbacher
2016-09-29 17:48:39 +02:00
committed by Al Viro
parent b6ba11773d
commit d0a5b995a3
3 changed files with 11 additions and 4 deletions
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2
fs/inode.c
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@@ -140,6 +140,8 @@ int inode_init_always(struct super_block *sb, struct inode *inode)
inode->i_fop = &no_open_fops;
inode->__i_nlink = 1;
inode->i_opflags = 0;
if (sb->s_xattr)
inode->i_opflags |= IOP_XATTR;
i_uid_write(inode, 0);
i_gid_write(inode, 0);
atomic_set(&inode->i_writecount, 0);