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| author | Amir Goldstein <amir73il@gmail.com> | 2019-11-19 17:49:17 +0200 |
|---|---|---|
| committer | Miklos Szeredi <mszeredi@redhat.com> | 2020-03-17 15:04:22 +0100 |
| commit | 2effc5c25d55b92b89303292128540618f182671 (patch) | |
| tree | 043af9512022bf5436d00b301fa1913db2a03caf /fs/overlayfs | |
| parent | 735c907d7b7df501e951ba07134b9f6f989a94e4 (diff) | |
| download | linux-2effc5c25d55b92b89303292128540618f182671.tar.gz | |
ovl: factor out helper ovl_get_root()
Allocates and initializes the root dentry and inode. Signed-off-by: Amir Goldstein <amir73il@gmail.com> Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Diffstat (limited to 'fs/overlayfs')
| -rw-r--r-- | fs/overlayfs/super.c | 44 |
1 files changed, 29 insertions, 15 deletions
diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c index ac967f1cb6e5..ae9e8b0877f3 100644 --- a/fs/overlayfs/super.c +++ b/fs/overlayfs/super.c @@ -1589,6 +1589,34 @@ static int ovl_check_overlapping_layers(struct super_block *sb, return 0; } +static struct dentry *ovl_get_root(struct super_block *sb, + struct dentry *upperdentry, + struct ovl_entry *oe) +{ + struct dentry *root; + + root = d_make_root(ovl_new_inode(sb, S_IFDIR, 0)); + if (!root) + return NULL; + + root->d_fsdata = oe; + + if (upperdentry) { + ovl_dentry_set_upper_alias(root); + if (ovl_is_impuredir(upperdentry)) + ovl_set_flag(OVL_IMPURE, d_inode(root)); + } + + /* Root is always merge -> can have whiteouts */ + ovl_set_flag(OVL_WHITEOUTS, d_inode(root)); + ovl_dentry_set_flag(OVL_E_CONNECTED, root); + ovl_set_upperdata(d_inode(root)); + ovl_inode_init(d_inode(root), upperdentry, ovl_dentry_lower(root), + NULL); + + return root; +} + static int ovl_fill_super(struct super_block *sb, void *data, int silent) { struct path upperpath = { }; @@ -1710,25 +1738,11 @@ static int ovl_fill_super(struct super_block *sb, void *data, int silent) sb->s_flags |= SB_POSIXACL; err = -ENOMEM; - root_dentry = d_make_root(ovl_new_inode(sb, S_IFDIR, 0)); + root_dentry = ovl_get_root(sb, upperpath.dentry, oe); if (!root_dentry) goto out_free_oe; - root_dentry->d_fsdata = oe; - mntput(upperpath.mnt); - if (upperpath.dentry) { - ovl_dentry_set_upper_alias(root_dentry); - if (ovl_is_impuredir(upperpath.dentry)) - ovl_set_flag(OVL_IMPURE, d_inode(root_dentry)); - } - - /* Root is always merge -> can have whiteouts */ - ovl_set_flag(OVL_WHITEOUTS, d_inode(root_dentry)); - ovl_dentry_set_flag(OVL_E_CONNECTED, root_dentry); - ovl_set_upperdata(d_inode(root_dentry)); - ovl_inode_init(d_inode(root_dentry), upperpath.dentry, - ovl_dentry_lower(root_dentry), NULL); sb->s_root = root_dentry; |