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ext4: adds project ID support

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Signed-off-by: Li Xi <lixi@ddn.com>
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Reviewed-by: Andreas Dilger <adilger@dilger.ca>
Reviewed-by: Jan Kara <jack@suse.cz>
This commit is contained in:
Li Xi
2016-01-08 16:01:21 -05:00
committed by Theodore Ts'o
parent 56a04915df
commit 040cb3786d
5 changed files with 68 additions and 4 deletions
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19
fs/ext4/namei.c
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@@ -3208,6 +3208,12 @@ static int ext4_link(struct dentry *old_dentry,
if (ext4_encrypted_inode(dir) &&
!ext4_is_child_context_consistent_with_parent(dir, inode))
return -EPERM;
if ((ext4_test_inode_flag(dir, EXT4_INODE_PROJINHERIT)) &&
(!projid_eq(EXT4_I(dir)->i_projid,
EXT4_I(old_dentry->d_inode)->i_projid)))
return -EXDEV;
err = dquot_initialize(dir);
if (err)
return err;
@@ -3488,6 +3494,11 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
int credits;
u8 old_file_type;
if ((ext4_test_inode_flag(new_dir, EXT4_INODE_PROJINHERIT)) &&
(!projid_eq(EXT4_I(new_dir)->i_projid,
EXT4_I(old_dentry->d_inode)->i_projid)))
return -EXDEV;
retval = dquot_initialize(old.dir);
if (retval)
return retval;
@@ -3697,6 +3708,14 @@ static int ext4_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
new.inode)))
return -EPERM;
if ((ext4_test_inode_flag(new_dir, EXT4_INODE_PROJINHERIT) &&
!projid_eq(EXT4_I(new_dir)->i_projid,
EXT4_I(old_dentry->d_inode)->i_projid)) ||
(ext4_test_inode_flag(old_dir, EXT4_INODE_PROJINHERIT) &&
!projid_eq(EXT4_I(old_dir)->i_projid,
EXT4_I(new_dentry->d_inode)->i_projid)))
return -EXDEV;
retval = dquot_initialize(old.dir);
if (retval)
return retval;