static int fuse_rename_common(struct inode *olddir, struct dentry *oldent,
struct inode *newdir, struct dentry *newent,
unsigned int flags, int opcode, size_t argsize)
{
int err;
struct fuse_rename2_in inarg;
struct fuse_conn *fc = get_fuse_conn(olddir);
FUSE_ARGS(args);
memset(&inarg, 0, argsize);
inarg.newdir = get_node_id(newdir);
inarg.flags = flags;
args.in.h.opcode = opcode;
args.in.h.nodeid = get_node_id(olddir);
args.in.numargs = 3;
args.in.args[0].size = argsize;
args.in.args[0].value = &inarg;
args.in.args[1].size = oldent->d_name.len + 1;
args.in.args[1].value = oldent->d_name.name;
args.in.args[2].size = newent->d_name.len + 1;
args.in.args[2].value = newent->d_name.name;
err = fuse_simple_request(fc, &args);
if (!err) {
/* ctime changes */
fuse_invalidate_attr(d_inode(oldent));
fuse_update_ctime(d_inode(oldent));
if (flags & RENAME_EXCHANGE) {
fuse_invalidate_attr(d_inode(newent));
fuse_update_ctime(d_inode(newent));
}
fuse_invalidate_attr(olddir);
if (olddir != newdir)
fuse_invalidate_attr(newdir);
/* newent will end up negative */
if (!(flags & RENAME_EXCHANGE) && d_really_is_positive(newent)) {
fuse_invalidate_attr(d_inode(newent));
fuse_invalidate_entry_cache(newent);
fuse_update_ctime(d_inode(newent));
}
} else if (err == -EINTR) {
/* If request was interrupted, DEITY only knows if the
rename actually took place. If the invalidation
fails (e.g. some process has CWD under the renamed
directory), then there can be inconsistency between
the dcache and the real filesystem. Tough luck. */
fuse_invalidate_entry(oldent);
if (d_really_is_positive(newent))
fuse_invalidate_entry(newent);
}
return err;
}
static int fuse_removexattr(struct dentry *entry, const char *name)
{
struct inode *inode = d_inode(entry);
struct fuse_conn *fc = get_fuse_conn(inode);
FUSE_ARGS(args);
int err;
if (fc->no_removexattr)
return -EOPNOTSUPP;
args.in.h.opcode = FUSE_REMOVEXATTR;
args.in.h.nodeid = get_node_id(inode);
args.in.numargs = 1;
args.in.args[0].size = strlen(name) + 1;
args.in.args[0].value = name;
err = fuse_simple_request(fc, &args);
if (err == -ENOSYS) {
fc->no_removexattr = 1;
err = -EOPNOTSUPP;
}
if (!err) {
fuse_invalidate_attr(inode);
fuse_update_ctime(inode);
}
return err;
}
static int fuse_unlink(struct inode *dir, struct dentry *entry)
{
int err;
struct fuse_conn *fc = get_fuse_conn(dir);
FUSE_ARGS(args);
args.in.h.opcode = FUSE_UNLINK;
args.in.h.nodeid = get_node_id(dir);
args.in.numargs = 1;
args.in.args[0].size = entry->d_name.len + 1;
args.in.args[0].value = entry->d_name.name;
err = fuse_simple_request(fc, &args);
if (!err) {
struct inode *inode = d_inode(entry);
struct fuse_inode *fi = get_fuse_inode(inode);
spin_lock(&fc->lock);
fi->attr_version = ++fc->attr_version;
/*
* If i_nlink == 0 then unlink doesn't make sense, yet this can
* happen if userspace filesystem is careless. It would be
* difficult to enforce correct nlink usage so just ignore this
* condition here
*/
if (inode->i_nlink > 0)
drop_nlink(inode);
spin_unlock(&fc->lock);
fuse_invalidate_attr(inode);
fuse_invalidate_attr(dir);
fuse_invalidate_entry_cache(entry);
fuse_update_ctime(inode);
} else if (err == -EINTR)
fuse_invalidate_entry(entry);
return err;
}
static int fuse_setxattr(struct dentry *unused, struct inode *inode,
const char *name, const void *value,
size_t size, int flags)
{
struct fuse_conn *fc = get_fuse_conn(inode);
FUSE_ARGS(args);
struct fuse_setxattr_in inarg;
int err;
if (fc->no_setxattr)
return -EOPNOTSUPP;
memset(&inarg, 0, sizeof(inarg));
inarg.size = size;
inarg.flags = flags;
args.in.h.opcode = FUSE_SETXATTR;
args.in.h.nodeid = get_node_id(inode);
args.in.numargs = 3;
args.in.args[0].size = sizeof(inarg);
args.in.args[0].value = &inarg;
args.in.args[1].size = strlen(name) + 1;
args.in.args[1].value = name;
args.in.args[2].size = size;
args.in.args[2].value = value;
err = fuse_simple_request(fc, &args);
if (err == -ENOSYS) {
fc->no_setxattr = 1;
err = -EOPNOTSUPP;
}
if (!err) {
fuse_invalidate_attr(inode);
fuse_update_ctime(inode);
}
return err;
}
static int fuse_link(struct dentry *entry, struct inode *newdir,
struct dentry *newent)
{
int err;
struct fuse_link_in inarg;
struct inode *inode = d_inode(entry);
struct fuse_conn *fc = get_fuse_conn(inode);
FUSE_ARGS(args);
memset(&inarg, 0, sizeof(inarg));
inarg.oldnodeid = get_node_id(inode);
args.in.h.opcode = FUSE_LINK;
args.in.numargs = 2;
args.in.args[0].size = sizeof(inarg);
args.in.args[0].value = &inarg;
args.in.args[1].size = newent->d_name.len + 1;
args.in.args[1].value = newent->d_name.name;
err = create_new_entry(fc, &args, newdir, newent, inode->i_mode);
/* Contrary to "normal" filesystems it can happen that link
makes two "logical" inodes point to the same "physical"
inode. We invalidate the attributes of the old one, so it
will reflect changes in the backing inode (link count,
etc.)
*/
if (!err) {
struct fuse_inode *fi = get_fuse_inode(inode);
spin_lock(&fc->lock);
fi->attr_version = ++fc->attr_version;
inc_nlink(inode);
spin_unlock(&fc->lock);
fuse_invalidate_attr(inode);
fuse_update_ctime(inode);
} else if (err == -EINTR) {
fuse_invalidate_attr(inode);
}
return err;
}
