Btrfs: Add ACL support

Signed-off-by: Chris Mason <chris.mason@oracle.com>

1 files changed, 41 insertions, 1 deletions

diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 8d371d6fe551..2d8853543a71 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -36,6 +36,7 @@
 #include <linux/bit_spinlock.h>
 #include <linux/version.h>
 #include <linux/xattr.h>
+#include <linux/posix_acl.h>
 #include "ctree.h"
 #include "disk-io.h"
 #include "transaction.h"
@@ -1478,6 +1479,9 @@ static int btrfs_setattr(struct dentry *dentry, struct iattr *attr)
         }
 out:
         err = inode_setattr(inode, attr);
+
+        if (!err && ((attr->ia_valid & ATTR_MODE)))
+                err = btrfs_acl_chmod(inode);
 fail:
         return err;
 }
@@ -2184,6 +2188,12 @@ static int btrfs_mknod(struct inode *dir, struct dentry *dentry,
         if (IS_ERR(inode))
                 goto out_unlock;
 
+        err = btrfs_init_acl(inode, dir);
+        if (err) {
+                drop_inode = 1;
+                goto out_unlock;
+        }
+
         btrfs_set_trans_block_group(trans, inode);
         err = btrfs_add_nondir(trans, dentry, inode, 0);
         if (err)
@@ -2239,6 +2249,12 @@ static int btrfs_create(struct inode *dir, struct dentry *dentry,
         if (IS_ERR(inode))
                 goto out_unlock;
 
+        err = btrfs_init_acl(inode, dir);
+        if (err) {
+                drop_inode = 1;
+                goto out_unlock;
+        }
+
         btrfs_set_trans_block_group(trans, inode);
         err = btrfs_add_nondir(trans, dentry, inode, 0);
         if (err)
@@ -2366,6 +2382,11 @@ static int btrfs_mkdir(struct inode *dir, struct dentry *dentry, int mode)
         }
 
         drop_on_err = 1;
+
+        err = btrfs_init_acl(inode, dir);
+        if (err)
+                goto out_fail;
+
         inode->i_op = &btrfs_dir_inode_operations;
         inode->i_fop = &btrfs_dir_file_operations;
         btrfs_set_trans_block_group(trans, inode);
@@ -3023,6 +3044,8 @@ struct inode *btrfs_alloc_inode(struct super_block *sb)
                 return NULL;
         ei->last_trans = 0;
         btrfs_ordered_inode_tree_init(&ei->ordered_tree);
+        ei->i_acl = BTRFS_ACL_NOT_CACHED;
+        ei->i_default_acl = BTRFS_ACL_NOT_CACHED;
         return &ei->vfs_inode;
 }
 
@@ -3032,6 +3055,13 @@ void btrfs_destroy_inode(struct inode *inode)
         WARN_ON(!list_empty(&inode->i_dentry));
         WARN_ON(inode->i_data.nrpages);
 
+        if (BTRFS_I(inode)->i_acl &&
+            BTRFS_I(inode)->i_acl != BTRFS_ACL_NOT_CACHED)
+                posix_acl_release(BTRFS_I(inode)->i_acl);
+        if (BTRFS_I(inode)->i_default_acl &&
+            BTRFS_I(inode)->i_default_acl != BTRFS_ACL_NOT_CACHED)
+                posix_acl_release(BTRFS_I(inode)->i_default_acl);
+
         while(1) {
                 ordered = btrfs_lookup_first_ordered_extent(inode, (u64)-1);
                 if (!ordered)
@@ -3230,6 +3260,12 @@ static int btrfs_symlink(struct inode *dir, struct dentry *dentry,
         if (IS_ERR(inode))
                 goto out_unlock;
 
+        err = btrfs_init_acl(inode, dir);
+        if (err) {
+                drop_inode = 1;
+                goto out_unlock;
+        }
+
         btrfs_set_trans_block_group(trans, inode);
         err = btrfs_add_nondir(trans, dentry, inode, 0);
         if (err)
@@ -3310,7 +3346,7 @@ static int btrfs_permission(struct inode *inode, int mask,
 {
         if (btrfs_test_flag(inode, READONLY) && (mask & MAY_WRITE))
                 return -EACCES;
-        return generic_permission(inode, mask, NULL);
+        return generic_permission(inode, mask, btrfs_check_acl);
 }
 
 static struct inode_operations btrfs_dir_inode_operations = {
@@ -3392,6 +3428,10 @@ static struct inode_operations btrfs_special_inode_operations = {
         .getattr        = btrfs_getattr,
         .setattr        = btrfs_setattr,
         .permission     = btrfs_permission,
+        .setxattr       = generic_setxattr,
+        .getxattr       = generic_getxattr,
+        .listxattr      = btrfs_listxattr,
+        .removexattr    = generic_removexattr,
 };
 static struct inode_operations btrfs_symlink_inode_operations = {
         .readlink       = generic_readlink,