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d9a82a0403
The xattr_handler operations are currently all passed a file system specific flags value which the operations can use to disambiguate between different handlers; some file systems use that to distinguish the xattr namespace, for example. In some oprations, it would be useful to also have access to the handler prefix. To allow that, pass a pointer to the handler to operations instead of the flags value alone. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
58 lines
1.4 KiB
C
58 lines
1.4 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 (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX))
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return -EINVAL;
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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), name, 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 (strlen(name) < sizeof(XATTR_TRUSTED_PREFIX))
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return -EINVAL;
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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), name, buffer, size, flags);
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}
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static size_t trusted_list(const struct xattr_handler *handler,
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struct dentry *dentry, char *list, size_t list_size,
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const char *name, size_t name_len)
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{
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const size_t len = name_len + 1;
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if (!capable(CAP_SYS_ADMIN) || IS_PRIVATE(d_inode(dentry)))
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return 0;
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if (list && len <= list_size) {
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memcpy(list, name, name_len);
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list[name_len] = '\0';
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}
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return len;
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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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