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79a628d14e
reiserfs_xattr_[sg]et() will fail with -EOPNOTSUPP for V1 inodes anyway, and all reiserfs instances of ->[sg]et() call it and so does ->set_acl(). Checks for name length in the instances had been bogus; they should've been "bugger off if it's _exactly_ the prefix" (as generic would do on its own) and not "bugger off if it's shorter than the prefix" - that can't happen. xattr_full_name() is needed to adjust for the fact that generic instances will skip the prefix in the name passed to ->[gs]et(); reiserfs homegrown analogues didn't. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
44 lines
1.1 KiB
C
44 lines
1.1 KiB
C
#include "reiserfs.h"
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#include <linux/capability.h>
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#include <linux/errno.h>
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#include <linux/fs.h>
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#include <linux/pagemap.h>
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#include <linux/xattr.h>
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#include "xattr.h"
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#include <linux/uaccess.h>
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static int
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trusted_get(const struct xattr_handler *handler, struct dentry *dentry,
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const char *name, void *buffer, size_t size)
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{
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if (!capable(CAP_SYS_ADMIN) || IS_PRIVATE(d_inode(dentry)))
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return -EPERM;
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return reiserfs_xattr_get(d_inode(dentry),
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xattr_full_name(handler, name),
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buffer, size);
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}
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static int
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trusted_set(const struct xattr_handler *handler, struct dentry *dentry,
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const char *name, const void *buffer, size_t size, int flags)
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{
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if (!capable(CAP_SYS_ADMIN) || IS_PRIVATE(d_inode(dentry)))
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return -EPERM;
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return reiserfs_xattr_set(d_inode(dentry),
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xattr_full_name(handler, name),
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buffer, size, flags);
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}
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static bool trusted_list(struct dentry *dentry)
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{
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return capable(CAP_SYS_ADMIN) && !IS_PRIVATE(d_inode(dentry));
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}
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const struct xattr_handler reiserfs_xattr_trusted_handler = {
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.prefix = XATTR_TRUSTED_PREFIX,
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.get = trusted_get,
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.set = trusted_set,
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.list = trusted_list,
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};
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