ocfs2: Replace list xattr handler operations

The list operations of the ocfs2 xattr handlers were never called
anywhere.  Remove them and directly check in ocfs2_xattr_list_entry
which attributes should be skipped over instead.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Cc: ocfs2-devel@oss.oracle.com
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>

diff --git a/fs/ocfs2/xattr.c b/fs/ocfs2/xattr.c
index 5823f98..f0e241f 100644 (file)
--- a/fs/ocfs2/xattr.c
+++ b/fs/ocfs2/xattr.c
@@ -883,14 +883,39 @@ static int ocfs2_xattr_value_truncate(struct inode *inode,
        return ret;
 }
 
-static int ocfs2_xattr_list_entry(char *buffer, size_t size,
-                                 size_t *result, const char *prefix,
+static int ocfs2_xattr_list_entry(struct super_block *sb,
+                                 char *buffer, size_t size,
+                                 size_t *result, int type,
                                  const char *name, int name_len)
 {
        char *p = buffer + *result;
-       int prefix_len = strlen(prefix);
-       int total_len = prefix_len + name_len + 1;
+       const char *prefix;
+       int prefix_len;
+       int total_len;
 
+       switch(type) {
+       case OCFS2_XATTR_INDEX_USER:
+               if (OCFS2_SB(sb)->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
+                       return 0;
+               break;
+
+       case OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS:
+       case OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT:
+               if (!(sb->s_flags & MS_POSIXACL))
+                       return 0;
+               break;
+
+       case OCFS2_XATTR_INDEX_TRUSTED:
+               if (!capable(CAP_SYS_ADMIN))
+                       return 0;
+               break;
+       }
+
+       prefix = ocfs2_xattr_prefix(type);
+       if (!prefix)
+               return 0;
+       prefix_len = strlen(prefix);
+       total_len = prefix_len + name_len + 1;
        *result += total_len;
 
        /* we are just looking for how big our buffer needs to be */
@@ -913,23 +938,20 @@ static int ocfs2_xattr_list_entries(struct inode *inode,
 {
        size_t result = 0;
        int i, type, ret;
-       const char *prefix, *name;
+       const char *name;
 
        for (i = 0 ; i < le16_to_cpu(header->xh_count); i++) {
                struct ocfs2_xattr_entry *entry = &header->xh_entries[i];
                type = ocfs2_xattr_get_type(entry);
-               prefix = ocfs2_xattr_prefix(type);
-
-               if (prefix) {
-                       name = (const char *)header +
-                               le16_to_cpu(entry->xe_name_offset);
+               name = (const char *)header +
+                       le16_to_cpu(entry->xe_name_offset);
 
-                       ret = ocfs2_xattr_list_entry(buffer, buffer_size,
-                                                    &result, prefix, name,
-                                                    entry->xe_name_len);
-                       if (ret)
-                               return ret;
-               }
+               ret = ocfs2_xattr_list_entry(inode->i_sb,
+                                            buffer, buffer_size,
+                                            &result, type, name,
+                                            entry->xe_name_len);
+               if (ret)
+                       return ret;
        }
 
        return result;
@@ -4032,32 +4054,30 @@ static int ocfs2_list_xattr_bucket(struct inode *inode,
        int ret = 0, type;
        struct ocfs2_xattr_tree_list *xl = (struct ocfs2_xattr_tree_list *)para;
        int i, block_off, new_offset;
-       const char *prefix, *name;
+       const char *name;
 
        for (i = 0 ; i < le16_to_cpu(bucket_xh(bucket)->xh_count); i++) {
                struct ocfs2_xattr_entry *entry = &bucket_xh(bucket)->xh_entries[i];
                type = ocfs2_xattr_get_type(entry);
-               prefix = ocfs2_xattr_prefix(type);
 
-               if (prefix) {
-                       ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb,
-                                                               bucket_xh(bucket),
-                                                               i,
-                                                               &block_off,
-                                                               &new_offset);
-                       if (ret)
-                               break;
+               ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb,
+                                                       bucket_xh(bucket),
+                                                       i,
+                                                       &block_off,
+                                                       &new_offset);
+               if (ret)
+                       break;
 
-                       name = (const char *)bucket_block(bucket, block_off) +
-                               new_offset;
-                       ret = ocfs2_xattr_list_entry(xl->buffer,
-                                                    xl->buffer_size,
-                                                    &xl->result,
-                                                    prefix, name,
-                                                    entry->xe_name_len);
-                       if (ret)
-                               break;
-               }
+               name = (const char *)bucket_block(bucket, block_off) +
+                       new_offset;
+               ret = ocfs2_xattr_list_entry(inode->i_sb,
+                                            xl->buffer,
+                                            xl->buffer_size,
+                                            &xl->result,
+                                            type, name,
+                                            entry->xe_name_len);
+               if (ret)
+                       break;
        }
 
        return ret;
@@ -7225,25 +7245,10 @@ int ocfs2_init_security_and_acl(struct inode *dir,
 leave:
        return ret;
 }
+
 /*
  * 'security' attributes support
  */
-static size_t ocfs2_xattr_security_list(const struct xattr_handler *handler,
-                                       struct dentry *dentry, char *list,
-                                       size_t list_size, const char *name,
-                                       size_t name_len)
-{
-       const size_t prefix_len = XATTR_SECURITY_PREFIX_LEN;
-       const size_t total_len = prefix_len + name_len + 1;
-
-       if (list && total_len <= list_size) {
-               memcpy(list, XATTR_SECURITY_PREFIX, prefix_len);
-               memcpy(list + prefix_len, name, name_len);
-               list[prefix_len + name_len] = '\0';
-       }
-       return total_len;
-}
-
 static int ocfs2_xattr_security_get(const struct xattr_handler *handler,
                                    struct dentry *dentry, const char *name,
                                    void *buffer, size_t size)
@@ -7308,7 +7313,6 @@ int ocfs2_init_security_set(handle_t *handle,
 
 const struct xattr_handler ocfs2_xattr_security_handler = {
        .prefix = XATTR_SECURITY_PREFIX,
-       .list   = ocfs2_xattr_security_list,
        .get    = ocfs2_xattr_security_get,
        .set    = ocfs2_xattr_security_set,
 };
@@ -7316,25 +7320,6 @@ const struct xattr_handler ocfs2_xattr_security_handler = {
 /*
  * 'trusted' attributes support
  */
-static size_t ocfs2_xattr_trusted_list(const struct xattr_handler *handler,
-                                      struct dentry *dentry, char *list,
-                                      size_t list_size, const char *name,
-                                      size_t name_len)
-{
-       const size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN;
-       const size_t total_len = prefix_len + name_len + 1;
-
-       if (!capable(CAP_SYS_ADMIN))
-               return 0;
-
-       if (list && total_len <= list_size) {
-               memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len);
-               memcpy(list + prefix_len, name, name_len);
-               list[prefix_len + name_len] = '\0';
-       }
-       return total_len;
-}
-
 static int ocfs2_xattr_trusted_get(const struct xattr_handler *handler,
                                   struct dentry *dentry, const char *name,
                                   void *buffer, size_t size)
@@ -7353,7 +7338,6 @@ static int ocfs2_xattr_trusted_set(const struct xattr_handler *handler,
 
 const struct xattr_handler ocfs2_xattr_trusted_handler = {
        .prefix = XATTR_TRUSTED_PREFIX,
-       .list   = ocfs2_xattr_trusted_list,
        .get    = ocfs2_xattr_trusted_get,
        .set    = ocfs2_xattr_trusted_set,
 };
@@ -7361,26 +7345,6 @@ const struct xattr_handler ocfs2_xattr_trusted_handler = {
 /*
  * 'user' attributes support
  */
-static size_t ocfs2_xattr_user_list(const struct xattr_handler *handler,
-                                   struct dentry *dentry, char *list,
-                                   size_t list_size, const char *name,
-                                   size_t name_len)
-{
-       const size_t prefix_len = XATTR_USER_PREFIX_LEN;
-       const size_t total_len = prefix_len + name_len + 1;
-       struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb);
-
-       if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
-               return 0;
-
-       if (list && total_len <= list_size) {
-               memcpy(list, XATTR_USER_PREFIX, prefix_len);
-               memcpy(list + prefix_len, name, name_len);
-               list[prefix_len + name_len] = '\0';
-       }
-       return total_len;
-}
-
 static int ocfs2_xattr_user_get(const struct xattr_handler *handler,
                                struct dentry *dentry, const char *name,
                                void *buffer, size_t size)
@@ -7408,7 +7372,6 @@ static int ocfs2_xattr_user_set(const struct xattr_handler *handler,
 
 const struct xattr_handler ocfs2_xattr_user_handler = {
        .prefix = XATTR_USER_PREFIX,
-       .list   = ocfs2_xattr_user_list,
        .get    = ocfs2_xattr_user_get,
        .set    = ocfs2_xattr_user_set,
 };