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2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c 
 kernel/fs/xfs/libxfs/xfs_attr.h
....@@ -1,4 +1,4 @@
1
-// SPDX-License-Identifier: GPL-2.0
1
+/* SPDX-License-Identifier: GPL-2.0 */
22 /*
33  * Copyright (c) 2000,2002-2003,2005 Silicon Graphics, Inc.
44  * All Rights Reserved.
....@@ -21,34 +21,6 @@
2121  * as possible so as to fit into the literal area of the inode.
2222  */
2323 
24
-/*========================================================================
25
- * External interfaces
26
- *========================================================================*/
27
-
28
-
29
-#define ATTR_DONTFOLLOW	0x0001	/* -- unused, from IRIX -- */
30
-#define ATTR_ROOT	0x0002	/* use attrs in root (trusted) namespace */
31
-#define ATTR_TRUST	0x0004	/* -- unused, from IRIX -- */
32
-#define ATTR_SECURE	0x0008	/* use attrs in security namespace */
33
-#define ATTR_CREATE	0x0010	/* pure create: fail if attr already exists */
34
-#define ATTR_REPLACE	0x0020	/* pure set: fail if attr does not exist */
35
-
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-#define ATTR_KERNOTIME	0x1000	/* [kernel] don't update inode timestamps */
37
-#define ATTR_KERNOVAL	0x2000	/* [kernel] get attr size only, not value */
38
-
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-#define ATTR_INCOMPLETE	0x4000	/* [kernel] return INCOMPLETE attr keys */
40
-
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-#define XFS_ATTR_FLAGS \
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-	{ ATTR_DONTFOLLOW, 	"DONTFOLLOW" }, \
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-	{ ATTR_ROOT,		"ROOT" }, \
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-	{ ATTR_TRUST,		"TRUST" }, \
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-	{ ATTR_SECURE,		"SECURE" }, \
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-	{ ATTR_CREATE,		"CREATE" }, \
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-	{ ATTR_REPLACE,		"REPLACE" }, \
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-	{ ATTR_KERNOTIME,	"KERNOTIME" }, \
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-	{ ATTR_KERNOVAL,	"KERNOVAL" }, \
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-	{ ATTR_INCOMPLETE,	"INCOMPLETE" }
51
-
5224 /*
5325  * The maximum size (into the kernel or returned from the kernel) of an
5426  * attribute value or the buffer used for an attr_list() call.  Larger
....@@ -57,45 +29,16 @@
5729 #define	ATTR_MAX_VALUELEN	(64*1024)	/* max length of a value */
5830 
5931 /*
60
- * Define how lists of attribute names are returned to the user from
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- * the attr_list() call.  A large, 32bit aligned, buffer is passed in
62
- * along with its size.  We put an array of offsets at the top that each
63
- * reference an attrlist_ent_t and pack the attrlist_ent_t's at the bottom.
64
- */
65
-typedef struct attrlist {
66
-	__s32	al_count;	/* number of entries in attrlist */
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-	__s32	al_more;	/* T/F: more attrs (do call again) */
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-	__s32	al_offset[1];	/* byte offsets of attrs [var-sized] */
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-} attrlist_t;
70
-
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-/*
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- * Show the interesting info about one attribute.  This is what the
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- * al_offset[i] entry points to.
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- */
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-typedef struct attrlist_ent {	/* data from attr_list() */
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-	__u32	a_valuelen;	/* number bytes in value of attr */
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-	char	a_name[1];	/* attr name (NULL terminated) */
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-} attrlist_ent_t;
79
-
80
-/*
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- * Given a pointer to the (char*) buffer containing the attr_list() result,
82
- * and an index, return a pointer to the indicated attribute in the buffer.
83
- */
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-#define	ATTR_ENTRY(buffer, index)		\
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-	((attrlist_ent_t *)			\
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-	 &((char *)buffer)[ ((attrlist_t *)(buffer))->al_offset[index] ])
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-
88
-/*
8932  * Kernel-internal version of the attrlist cursor.
9033  */
91
-typedef struct attrlist_cursor_kern {
34
+struct xfs_attrlist_cursor_kern {
9235 	__u32	hashval;	/* hash value of next entry to add */
9336 	__u32	blkno;		/* block containing entry (suggestion) */
9437 	__u32	offset;		/* offset in list of equal-hashvals */
9538 	__u16	pad1;		/* padding to match user-level */
9639 	__u8	pad2;		/* padding to match user-level */
9740 	__u8	initted;	/* T/F: cursor has been initialized */
98
-} attrlist_cursor_kern_t;
41
+};
9942 
10043 
10144 /*========================================================================
....@@ -107,21 +50,28 @@
10750 typedef void (*put_listent_func_t)(struct xfs_attr_list_context *, int,
10851 			      unsigned char *, int, int);
10952 
110
-typedef struct xfs_attr_list_context {
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-	struct xfs_trans		*tp;
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-	struct xfs_inode		*dp;		/* inode */
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-	struct attrlist_cursor_kern	*cursor;	/* position in list */
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-	char				*alist;		/* output buffer */
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-	int				seen_enough;	/* T/F: seen enough of list? */
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-	ssize_t				count;		/* num used entries */
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-	int				dupcnt;		/* count dup hashvals seen */
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-	int				bufsize;	/* total buffer size */
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-	int				firstu;		/* first used byte in buffer */
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-	int				flags;		/* from VOP call */
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-	int				resynch;	/* T/F: resynch with cursor */
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-	put_listent_func_t		put_listent;	/* list output fmt function */
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-	int				index;		/* index into output buffer */
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-} xfs_attr_list_context_t;
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+struct xfs_attr_list_context {
54
+	struct xfs_trans	*tp;
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+	struct xfs_inode	*dp;		/* inode */
56
+	struct xfs_attrlist_cursor_kern cursor;	/* position in list */
57
+	void			*buffer;	/* output buffer */
58
+
59
+	/*
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+	 * Abort attribute list iteration if non-zero.  Can be used to pass
61
+	 * error values to the xfs_attr_list caller.
62
+	 */
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+	int			seen_enough;
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+	bool			allow_incomplete;
65
+
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+	ssize_t			count;		/* num used entries */
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+	int			dupcnt;		/* count dup hashvals seen */
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+	int			bufsize;	/* total buffer size */
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+	int			firstu;		/* first used byte in buffer */
70
+	unsigned int		attr_filter;	/* XFS_ATTR_{ROOT,SECURE} */
71
+	int			resynch;	/* T/F: resynch with cursor */
72
+	put_listent_func_t	put_listent;	/* list output fmt function */
73
+	int			index;		/* index into output buffer */
74
+};
12575 
12676 
12777 /*========================================================================
....@@ -132,19 +82,15 @@
13282  * Overall external interface routines.
13383  */
13484 int xfs_attr_inactive(struct xfs_inode *dp);
135
-int xfs_attr_list_int_ilocked(struct xfs_attr_list_context *);
136
-int xfs_attr_list_int(struct xfs_attr_list_context *);
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+int xfs_attr_list_ilocked(struct xfs_attr_list_context *);
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+int xfs_attr_list(struct xfs_attr_list_context *);
13787 int xfs_inode_hasattr(struct xfs_inode *ip);
138
-int xfs_attr_get_ilocked(struct xfs_inode *ip, struct xfs_da_args *args);
139
-int xfs_attr_get(struct xfs_inode *ip, const unsigned char *name,
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-		 unsigned char *value, int *valuelenp, int flags);
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-int xfs_attr_set(struct xfs_inode *dp, const unsigned char *name,
142
-		 unsigned char *value, int valuelen, int flags);
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+int xfs_attr_get_ilocked(struct xfs_da_args *args);
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+int xfs_attr_get(struct xfs_da_args *args);
90
+int xfs_attr_set(struct xfs_da_args *args);
14391 int xfs_attr_set_args(struct xfs_da_args *args);
144
-int xfs_attr_remove(struct xfs_inode *dp, const unsigned char *name, int flags);
92
+int xfs_has_attr(struct xfs_da_args *args);
14593 int xfs_attr_remove_args(struct xfs_da_args *args);
146
-int xfs_attr_list(struct xfs_inode *dp, char *buffer, int bufsize,
147
-		  int flags, struct attrlist_cursor_kern *cursor);
148
-
94
+bool xfs_attr_namecheck(const void *name, size_t length);
14995 
15096 #endif	/* __XFS_ATTR_H__ */