export RK_PA3

hc

2024-02-19 151fecfb72a0d602dfe79790602ef64b4e241574

 kernel/fs/ext4/xattr.h
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@@ -48,7 +48,7 @@
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 	__le32	e_value_inum;	/* inode in which the value is stored */
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 	__le32	e_value_size;	/* size of attribute value */
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 	__le32	e_hash;		/* hash value of name and value */
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-	char	e_name[0];	/* attribute name */
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+	char	e_name[];	/* attribute name */
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 };
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 #define EXT4_XATTR_PAD_BITS		2
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@@ -95,6 +95,19 @@
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 #define EXT4_ZERO_XATTR_VALUE ((void *)-1)
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+/*
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+ * If we want to add an xattr to the inode, we should make sure that
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+ * i_extra_isize is not 0 and that the inode size is not less than
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+ * EXT4_GOOD_OLD_INODE_SIZE + extra_isize + pad.
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+ *   EXT4_GOOD_OLD_INODE_SIZE   extra_isize header   entry   pad  data
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+ * |--------------------------|------------|------|---------|---|-------|
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+ */
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+#define EXT4_INODE_HAS_XATTR_SPACE(inode)				\
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+	((EXT4_I(inode)->i_extra_isize != 0) &&				\
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+	 (EXT4_GOOD_OLD_INODE_SIZE + EXT4_I(inode)->i_extra_isize +	\
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+	  sizeof(struct ext4_xattr_ibody_header) + EXT4_XATTR_PAD <=	\
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+	  EXT4_INODE_SIZE((inode)->i_sb)))
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+
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 struct ext4_xattr_info {
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 	const char *name;
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 	const void *value;
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@@ -118,12 +131,13 @@
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 struct ext4_xattr_inode_array {
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 	unsigned int count;		/* # of used items in the array */
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-	struct inode *inodes[0];
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+	struct inode *inodes[];
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 };
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 extern const struct xattr_handler ext4_xattr_user_handler;
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 extern const struct xattr_handler ext4_xattr_trusted_handler;
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 extern const struct xattr_handler ext4_xattr_security_handler;
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+extern const struct xattr_handler ext4_xattr_hurd_handler;
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 #define EXT4_XATTR_NAME_ENCRYPTION_CONTEXT "c"
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143
 
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@@ -177,6 +191,7 @@
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 extern int ext4_expand_extra_isize_ea(struct inode *inode, int new_extra_isize,
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 			    struct ext4_inode *raw_inode, handle_t *handle);
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+extern void ext4_evict_ea_inode(struct inode *inode);
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 extern const struct xattr_handler *ext4_xattr_handlers[];
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@@ -185,9 +200,9 @@
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 extern int ext4_xattr_ibody_get(struct inode *inode, int name_index,
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 				const char *name,
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 				void *buffer, size_t buffer_size);
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-extern int ext4_xattr_ibody_inline_set(handle_t *handle, struct inode *inode,
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-				       struct ext4_xattr_info *i,
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-				       struct ext4_xattr_ibody_find *is);
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+extern int ext4_xattr_ibody_set(handle_t *handle, struct inode *inode,
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+				struct ext4_xattr_info *i,
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+				struct ext4_xattr_ibody_find *is);
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 extern struct mb_cache *ext4_xattr_create_cache(void);
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 extern void ext4_xattr_destroy_cache(struct mb_cache *);