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>
This commit is contained in:
Andreas Gruenbacher
Al Viro
Родитель
c4803c497f
Коммит
1046cb1195
151
fs/ocfs2/xattr.c
151
fs/ocfs2/xattr.c
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@ -883,14 +883,39 @@ static int ocfs2_xattr_value_truncate(struct inode *inode,
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return ret;
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}
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static int ocfs2_xattr_list_entry(char *buffer, size_t size,
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size_t *result, const char *prefix,
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static int ocfs2_xattr_list_entry(struct super_block *sb,
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char *buffer, size_t size,
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size_t *result, int type,
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const char *name, int name_len)
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{
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char *p = buffer + *result;
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int prefix_len = strlen(prefix);
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int total_len = prefix_len + name_len + 1;
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const char *prefix;
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int prefix_len;
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int total_len;
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switch(type) {
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case OCFS2_XATTR_INDEX_USER:
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if (OCFS2_SB(sb)->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
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return 0;
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break;
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case OCFS2_XATTR_INDEX_POSIX_ACL_ACCESS:
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case OCFS2_XATTR_INDEX_POSIX_ACL_DEFAULT:
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if (!(sb->s_flags & MS_POSIXACL))
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return 0;
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break;
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case OCFS2_XATTR_INDEX_TRUSTED:
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if (!capable(CAP_SYS_ADMIN))
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return 0;
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break;
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}
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prefix = ocfs2_xattr_prefix(type);
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if (!prefix)
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return 0;
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prefix_len = strlen(prefix);
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total_len = prefix_len + name_len + 1;
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*result += total_len;
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/* we are just looking for how big our buffer needs to be */
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@ -913,23 +938,20 @@ static int ocfs2_xattr_list_entries(struct inode *inode,
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{
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size_t result = 0;
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int i, type, ret;
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const char *prefix, *name;
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const char *name;
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for (i = 0 ; i < le16_to_cpu(header->xh_count); i++) {
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struct ocfs2_xattr_entry *entry = &header->xh_entries[i];
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type = ocfs2_xattr_get_type(entry);
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prefix = ocfs2_xattr_prefix(type);
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name = (const char *)header +
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le16_to_cpu(entry->xe_name_offset);
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if (prefix) {
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name = (const char *)header +
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le16_to_cpu(entry->xe_name_offset);
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ret = ocfs2_xattr_list_entry(buffer, buffer_size,
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&result, prefix, name,
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entry->xe_name_len);
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if (ret)
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return ret;
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}
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ret = ocfs2_xattr_list_entry(inode->i_sb,
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buffer, buffer_size,
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&result, type, name,
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entry->xe_name_len);
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if (ret)
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return ret;
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}
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return result;
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@ -4032,32 +4054,30 @@ static int ocfs2_list_xattr_bucket(struct inode *inode,
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int ret = 0, type;
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struct ocfs2_xattr_tree_list *xl = (struct ocfs2_xattr_tree_list *)para;
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int i, block_off, new_offset;
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const char *prefix, *name;
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const char *name;
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for (i = 0 ; i < le16_to_cpu(bucket_xh(bucket)->xh_count); i++) {
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struct ocfs2_xattr_entry *entry = &bucket_xh(bucket)->xh_entries[i];
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type = ocfs2_xattr_get_type(entry);
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prefix = ocfs2_xattr_prefix(type);
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if (prefix) {
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ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb,
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bucket_xh(bucket),
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i,
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&block_off,
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&new_offset);
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if (ret)
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break;
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ret = ocfs2_xattr_bucket_get_name_value(inode->i_sb,
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bucket_xh(bucket),
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i,
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&block_off,
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&new_offset);
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if (ret)
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break;
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name = (const char *)bucket_block(bucket, block_off) +
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new_offset;
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ret = ocfs2_xattr_list_entry(xl->buffer,
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xl->buffer_size,
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&xl->result,
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prefix, name,
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entry->xe_name_len);
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if (ret)
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break;
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}
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name = (const char *)bucket_block(bucket, block_off) +
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new_offset;
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ret = ocfs2_xattr_list_entry(inode->i_sb,
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xl->buffer,
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xl->buffer_size,
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&xl->result,
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type, name,
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entry->xe_name_len);
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if (ret)
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break;
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}
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return ret;
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@ -7225,25 +7245,10 @@ int ocfs2_init_security_and_acl(struct inode *dir,
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leave:
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return ret;
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}
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/*
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* 'security' attributes support
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*/
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static size_t ocfs2_xattr_security_list(const struct xattr_handler *handler,
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struct dentry *dentry, char *list,
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size_t list_size, const char *name,
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size_t name_len)
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{
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const size_t prefix_len = XATTR_SECURITY_PREFIX_LEN;
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const size_t total_len = prefix_len + name_len + 1;
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if (list && total_len <= list_size) {
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memcpy(list, XATTR_SECURITY_PREFIX, prefix_len);
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memcpy(list + prefix_len, name, name_len);
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list[prefix_len + name_len] = '\0';
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}
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return total_len;
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}
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static int ocfs2_xattr_security_get(const struct xattr_handler *handler,
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struct dentry *dentry, const char *name,
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void *buffer, size_t size)
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@ -7308,7 +7313,6 @@ int ocfs2_init_security_set(handle_t *handle,
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const struct xattr_handler ocfs2_xattr_security_handler = {
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.prefix = XATTR_SECURITY_PREFIX,
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.list = ocfs2_xattr_security_list,
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.get = ocfs2_xattr_security_get,
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.set = ocfs2_xattr_security_set,
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};
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@ -7316,25 +7320,6 @@ const struct xattr_handler ocfs2_xattr_security_handler = {
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/*
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* 'trusted' attributes support
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*/
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static size_t ocfs2_xattr_trusted_list(const struct xattr_handler *handler,
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struct dentry *dentry, char *list,
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size_t list_size, const char *name,
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size_t name_len)
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{
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const size_t prefix_len = XATTR_TRUSTED_PREFIX_LEN;
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const size_t total_len = prefix_len + name_len + 1;
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if (!capable(CAP_SYS_ADMIN))
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return 0;
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if (list && total_len <= list_size) {
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memcpy(list, XATTR_TRUSTED_PREFIX, prefix_len);
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memcpy(list + prefix_len, name, name_len);
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list[prefix_len + name_len] = '\0';
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}
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return total_len;
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}
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static int ocfs2_xattr_trusted_get(const struct xattr_handler *handler,
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struct dentry *dentry, const char *name,
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void *buffer, size_t size)
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@ -7353,7 +7338,6 @@ static int ocfs2_xattr_trusted_set(const struct xattr_handler *handler,
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const struct xattr_handler ocfs2_xattr_trusted_handler = {
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.prefix = XATTR_TRUSTED_PREFIX,
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.list = ocfs2_xattr_trusted_list,
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.get = ocfs2_xattr_trusted_get,
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.set = ocfs2_xattr_trusted_set,
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};
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@ -7361,26 +7345,6 @@ const struct xattr_handler ocfs2_xattr_trusted_handler = {
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/*
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* 'user' attributes support
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*/
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static size_t ocfs2_xattr_user_list(const struct xattr_handler *handler,
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struct dentry *dentry, char *list,
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size_t list_size, const char *name,
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size_t name_len)
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{
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const size_t prefix_len = XATTR_USER_PREFIX_LEN;
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const size_t total_len = prefix_len + name_len + 1;
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struct ocfs2_super *osb = OCFS2_SB(dentry->d_sb);
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if (osb->s_mount_opt & OCFS2_MOUNT_NOUSERXATTR)
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return 0;
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if (list && total_len <= list_size) {
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memcpy(list, XATTR_USER_PREFIX, prefix_len);
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memcpy(list + prefix_len, name, name_len);
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list[prefix_len + name_len] = '\0';
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}
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return total_len;
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}
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static int ocfs2_xattr_user_get(const struct xattr_handler *handler,
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struct dentry *dentry, const char *name,
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void *buffer, size_t size)
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@ -7408,7 +7372,6 @@ static int ocfs2_xattr_user_set(const struct xattr_handler *handler,
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const struct xattr_handler ocfs2_xattr_user_handler = {
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.prefix = XATTR_USER_PREFIX,
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.list = ocfs2_xattr_user_list,
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.get = ocfs2_xattr_user_get,
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.set = ocfs2_xattr_user_set,
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};
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