int read_xattrs(struct dir_ent *dir_ent)
{
struct inode_info *inode = dir_ent->inode;
char *filename = dir_ent->pathname;
struct xattr_list *xattr_list;
int xattrs;
if(no_xattrs || IS_PSEUDO(inode) || inode->root_entry)
return SQUASHFS_INVALID_XATTR;
xattrs = read_xattrs_from_system(filename, &xattr_list);
if(xattrs == 0)
return SQUASHFS_INVALID_XATTR;
return generate_xattrs(xattrs, xattr_list);
}
/*
* Add the existing xattr ids and xattr metadata in the file system being
* appended to, to the in-memory xattr cache. This allows duplicate checking to
* take place against the xattrs already in the file system being appended to,
* and ensures the pre-existing xattrs are written out along with any new xattrs
*/
int get_xattrs(int fd, struct squashfs_super_block *sBlk)
{
int ids, res, i, id;
unsigned int count;
TRACE("get_xattrs\n");
res = read_xattrs_from_disk(fd, sBlk);
if(res == SQUASHFS_INVALID_BLK || res == 0)
goto done;
ids = res;
/*
* for each xattr id read and construct its list of xattr
* name:value pairs, and add them to the in-memory xattr cache
*/
for(i = 0; i < ids; i++) {
struct xattr_list *xattr_list = get_xattr(i, &count);
if(xattr_list == NULL) {
res = 0;
goto done;
}
id = generate_xattrs(count, xattr_list);
/*
* Sanity check, the new xattr id should be the same as the
* xattr id in the original file system
*/
if(id != i) {
ERROR("BUG, different xattr_id in get_xattrs\n");
res = 0;
goto done;
}
}
done:
return res;
}
