add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

 kernel/fs/xfs/xfs_xattr.c
..
..
@@ -5,60 +5,37 @@
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  */
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 #include "xfs.h"
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+#include "xfs_shared.h"
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 #include "xfs_format.h"
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 #include "xfs_log_format.h"
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-#include "xfs_trans_resv.h"
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-#include "xfs_mount.h"
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 #include "xfs_da_format.h"
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 #include "xfs_inode.h"
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 #include "xfs_attr.h"
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-#include "xfs_attr_leaf.h"
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 #include "xfs_acl.h"
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+#include "xfs_da_btree.h"
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 #include <linux/posix_acl_xattr.h>
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-#include <linux/xattr.h>
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 static int
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 xfs_xattr_get(const struct xattr_handler *handler, struct dentry *unused,
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-		struct inode *inode, const char *name, void *value, size_t size)
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+		struct inode *inode, const char *name, void *value, size_t size,
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+		int flags)
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 {
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-	int xflags = handler->flags;
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-	struct xfs_inode *ip = XFS_I(inode);
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-	int error, asize = size;
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+	struct xfs_da_args	args = {
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+		.dp		= XFS_I(inode),
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+		.attr_filter	= handler->flags,
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+		.name		= name,
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+		.namelen	= strlen(name),
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+		.value		= value,
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+		.valuelen	= size,
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+	};
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+	int			error;
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-	/* Convert Linux syscall to XFS internal ATTR flags */
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-	if (!size) {
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-		xflags |= ATTR_KERNOVAL;
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-		value = NULL;
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-	}
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-
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-	error = xfs_attr_get(ip, (unsigned char *)name, value, &asize, xflags);
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+	error = xfs_attr_get(&args);
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 	if (error)
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 		return error;
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-	return asize;
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-}
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-
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-void
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-xfs_forget_acl(
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-	struct inode		*inode,
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-	const char		*name,
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-	int			xflags)
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-{
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-	/*
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-	 * Invalidate any cached ACLs if the user has bypassed the ACL
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-	 * interface. We don't validate the content whatsoever so it is caller
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-	 * responsibility to provide data in valid format and ensure i_mode is
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-	 * consistent.
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-	 */
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-	if (xflags & ATTR_ROOT) {
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-#ifdef CONFIG_XFS_POSIX_ACL
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-		if (!strcmp(name, SGI_ACL_FILE))
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-			forget_cached_acl(inode, ACL_TYPE_ACCESS);
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-		else if (!strcmp(name, SGI_ACL_DEFAULT))
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-			forget_cached_acl(inode, ACL_TYPE_DEFAULT);
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-#endif
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-	}
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+	return args.valuelen;
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 }
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 static int
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@@ -66,23 +43,20 @@
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 		struct inode *inode, const char *name, const void *value,
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 		size_t size, int flags)
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 {
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-	int			xflags = handler->flags;
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-	struct xfs_inode	*ip = XFS_I(inode);
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+	struct xfs_da_args	args = {
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+		.dp		= XFS_I(inode),
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+		.attr_filter	= handler->flags,
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+		.attr_flags	= flags,
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+		.name		= name,
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+		.namelen	= strlen(name),
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+		.value		= (void *)value,
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+		.valuelen	= size,
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+	};
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 	int			error;
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-	/* Convert Linux syscall to XFS internal ATTR flags */
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-	if (flags & XATTR_CREATE)
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-		xflags |= ATTR_CREATE;
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-	if (flags & XATTR_REPLACE)
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-		xflags |= ATTR_REPLACE;
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-
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-	if (!value)
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-		return xfs_attr_remove(ip, (unsigned char *)name, xflags);
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-	error = xfs_attr_set(ip, (unsigned char *)name,
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-				(void *)value, size, xflags);
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-	if (!error)
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-		xfs_forget_acl(inode, name, xflags);
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-
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+	error = xfs_attr_set(&args);
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+	if (!error && (handler->flags & XFS_ATTR_ROOT))
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+		xfs_forget_acl(inode, name);
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 	return error;
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 }
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..
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@@ -95,14 +69,14 @@
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 static const struct xattr_handler xfs_xattr_trusted_handler = {
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 	.prefix	= XATTR_TRUSTED_PREFIX,
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-	.flags	= ATTR_ROOT,
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+	.flags	= XFS_ATTR_ROOT,
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 	.get	= xfs_xattr_get,
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 	.set	= xfs_xattr_set,
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 };
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 static const struct xattr_handler xfs_xattr_security_handler = {
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 	.prefix	= XATTR_SECURITY_PREFIX,
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-	.flags	= ATTR_SECURE,
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+	.flags	= XFS_ATTR_SECURE,
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 	.get	= xfs_xattr_get,
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 	.set	= xfs_xattr_set,
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 };
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@@ -132,7 +106,7 @@
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 	if (context->count < 0 || context->seen_enough)
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 		return;
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-	if (!context->alist)
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+	if (!context->buffer)
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 		goto compute_size;
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 	arraytop = context->count + prefix_len + namelen + 1;
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@@ -141,7 +115,7 @@
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 		context->seen_enough = 1;
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 		return;
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 	}
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-	offset = (char *)context->alist + context->count;
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+	offset = context->buffer + context->count;
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 	strncpy(offset, prefix, prefix_len);
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 	offset += prefix_len;
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 	strncpy(offset, (char *)name, namelen);			/* real name */
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@@ -216,7 +190,6 @@
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 	size_t		size)
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 {
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 	struct xfs_attr_list_context context;
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-	struct attrlist_cursor_kern cursor = { 0 };
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 	struct inode	*inode = d_inode(dentry);
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 	int		error;
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@@ -225,14 +198,13 @@
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 	 */
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 	memset(&context, 0, sizeof(context));
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 	context.dp = XFS_I(inode);
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-	context.cursor = &cursor;
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 	context.resynch = 1;
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-	context.alist = size ? data : NULL;
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+	context.buffer = size ? data : NULL;
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 	context.bufsize = size;
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 	context.firstu = context.bufsize;
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 	context.put_listent = xfs_xattr_put_listent;
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-	error = xfs_attr_list_int(&context);
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+	error = xfs_attr_list(&context);
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 	if (error)
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 		return error;
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 	if (context.count < 0)