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c8b6056a50
This is mostly the same as on other filesystems except for attribute names with an "os2." prefix: for those, the prefix is not stored on disk, and on-attribute names without a prefix have "os2." added. As on several other filesystems, the underlying function for setting/removing xattrs (__jfs_setxattr) removes attributes when the value is NULL, so the set xattr handlers will work as expected. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
76 lines
2.5 KiB
C
76 lines
2.5 KiB
C
/*
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* Copyright (C) International Business Machines Corp., 2000-2002
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
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* the GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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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[0]; /* 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[0]; /* Variable length list */
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};
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/* Macros for defining maxiumum 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 *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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