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ea780283e2
This makes it harder for accidental or malicious changes to jfs_xattr_handlers at runtime. Cc: Dave Kleikamp <shaggy@kernel.org> Cc: jfs-discussion@lists.sourceforge.net Signed-off-by: Wedson Almeida Filho <walmeida@microsoft.com> Link: https://lore.kernel.org/r/20230930050033.41174-17-wedsonaf@gmail.com Reviewed-by: Dave Kleikamp <dave.kleikamp@oracle.com> Signed-off-by: Christian Brauner <brauner@kernel.org>
62 lines
1.8 KiB
C
62 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Copyright (C) International Business Machines Corp., 2000-2002
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*/
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#ifndef H_JFS_XATTR
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#define H_JFS_XATTR
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#include <linux/xattr.h>
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/*
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* jfs_ea_list describe the on-disk format of the extended attributes.
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* I know the null-terminator is redundant since namelen is stored, but
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* I am maintaining compatibility with OS/2 where possible.
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*/
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struct jfs_ea {
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u8 flag; /* Unused? */
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u8 namelen; /* Length of name */
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__le16 valuelen; /* Length of value */
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char name[]; /* Attribute name (includes null-terminator) */
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}; /* Value immediately follows name */
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struct jfs_ea_list {
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__le32 size; /* overall size */
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struct jfs_ea ea[]; /* Variable length list */
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};
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/* Macros for defining maximum number of bytes supported for EAs */
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#define MAXEASIZE 65535
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#define MAXEALISTSIZE MAXEASIZE
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/*
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* some macros for dealing with variable length EA lists.
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*/
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#define EA_SIZE(ea) \
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(sizeof (struct jfs_ea) + (ea)->namelen + 1 + \
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le16_to_cpu((ea)->valuelen))
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#define NEXT_EA(ea) ((struct jfs_ea *) (((char *) (ea)) + (EA_SIZE (ea))))
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#define FIRST_EA(ealist) ((ealist)->ea)
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#define EALIST_SIZE(ealist) le32_to_cpu((ealist)->size)
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#define END_EALIST(ealist) \
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((struct jfs_ea *) (((char *) (ealist)) + EALIST_SIZE(ealist)))
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extern int __jfs_setxattr(tid_t, struct inode *, const char *, const void *,
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size_t, int);
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extern ssize_t __jfs_getxattr(struct inode *, const char *, void *, size_t);
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extern ssize_t jfs_listxattr(struct dentry *, char *, size_t);
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extern const struct xattr_handler * const jfs_xattr_handlers[];
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#ifdef CONFIG_JFS_SECURITY
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extern int jfs_init_security(tid_t, struct inode *, struct inode *,
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const struct qstr *);
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#else
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static inline int jfs_init_security(tid_t tid, struct inode *inode,
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struct inode *dir, const struct qstr *qstr)
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{
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return 0;
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}
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#endif
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#endif /* H_JFS_XATTR */
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