return jiffies + timespec_to_jiffies(&ts);
}
+static void fuse_change_timeout(struct dentry *entry, struct fuse_entry_out *o)
+{
+ struct fuse_inode *fi = get_fuse_inode(entry->d_inode);
+ entry->d_time = time_to_jiffies(o->entry_valid, o->entry_valid_nsec);
+ fi->i_time = time_to_jiffies(o->attr_valid, o->attr_valid_nsec);
+}
+
static void fuse_lookup_init(struct fuse_req *req, struct inode *dir,
struct dentry *entry,
struct fuse_entry_out *outarg)
return 0;
fuse_change_attributes(inode, &outarg.attr);
- entry->d_time = time_to_jiffies(outarg.entry_valid,
- outarg.entry_valid_nsec);
- fi->i_time = time_to_jiffies(outarg.attr_valid,
- outarg.attr_valid_nsec);
+ fuse_change_timeout(entry, &outarg);
}
return 1;
}
+static int dir_alias(struct inode *inode)
+{
+ if (S_ISDIR(inode->i_mode)) {
+ /* Don't allow creating an alias to a directory */
+ struct dentry *alias = d_find_alias(inode);
+ if (alias) {
+ dput(alias);
+ return 1;
+ }
+ }
+ return 0;
+}
+
+static inline int invalid_nodeid(u64 nodeid)
+{
+ return !nodeid || nodeid == FUSE_ROOT_ID;
+}
+
static struct dentry_operations fuse_dentry_operations = {
.d_revalidate = fuse_dentry_revalidate,
};
-static int fuse_lookup_iget(struct inode *dir, struct dentry *entry,
- struct inode **inodep)
+static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry,
+ struct nameidata *nd)
{
int err;
struct fuse_entry_out outarg;
struct fuse_req *req;
if (entry->d_name.len > FUSE_NAME_MAX)
- return -ENAMETOOLONG;
+ return ERR_PTR(-ENAMETOOLONG);
req = fuse_get_request(fc);
if (!req)
- return -EINTR;
+ return ERR_PTR(-EINTR);
fuse_lookup_init(req, dir, entry, &outarg);
request_send(fc, req);
err = req->out.h.error;
- if (!err && (!outarg.nodeid || outarg.nodeid == FUSE_ROOT_ID))
+ if (!err && invalid_nodeid(outarg.nodeid))
err = -EIO;
if (!err) {
inode = fuse_iget(dir->i_sb, outarg.nodeid, outarg.generation,
&outarg.attr);
if (!inode) {
fuse_send_forget(fc, req, outarg.nodeid, 1);
- return -ENOMEM;
+ return ERR_PTR(-ENOMEM);
}
}
fuse_put_request(fc, req);
if (err && err != -ENOENT)
- return err;
+ return ERR_PTR(err);
- if (inode) {
- struct fuse_inode *fi = get_fuse_inode(inode);
- entry->d_time = time_to_jiffies(outarg.entry_valid,
- outarg.entry_valid_nsec);
- fi->i_time = time_to_jiffies(outarg.attr_valid,
- outarg.attr_valid_nsec);
+ if (inode && dir_alias(inode)) {
+ iput(inode);
+ return ERR_PTR(-EIO);
}
-
+ d_add(entry, inode);
entry->d_op = &fuse_dentry_operations;
- *inodep = inode;
- return 0;
+ if (inode)
+ fuse_change_timeout(entry, &outarg);
+ return NULL;
}
void fuse_invalidate_attr(struct inode *inode)
entry->d_time = jiffies - 1;
}
+static int fuse_create_open(struct inode *dir, struct dentry *entry, int mode,
+ struct nameidata *nd)
+{
+ int err;
+ struct inode *inode;
+ struct fuse_conn *fc = get_fuse_conn(dir);
+ struct fuse_req *req;
+ struct fuse_open_in inarg;
+ struct fuse_open_out outopen;
+ struct fuse_entry_out outentry;
+ struct fuse_file *ff;
+ struct file *file;
+ int flags = nd->intent.open.flags - 1;
+
+ err = -ENOSYS;
+ if (fc->no_create)
+ goto out;
+
+ err = -ENAMETOOLONG;
+ if (entry->d_name.len > FUSE_NAME_MAX)
+ goto out;
+
+ err = -EINTR;
+ req = fuse_get_request(fc);
+ if (!req)
+ goto out;
+
+ ff = fuse_file_alloc();
+ if (!ff)
+ goto out_put_request;
+
+ flags &= ~O_NOCTTY;
+ memset(&inarg, 0, sizeof(inarg));
+ inarg.flags = flags;
+ inarg.mode = mode;
+ req->in.h.opcode = FUSE_CREATE;
+ req->in.h.nodeid = get_node_id(dir);
+ req->inode = dir;
+ req->in.numargs = 2;
+ req->in.args[0].size = sizeof(inarg);
+ req->in.args[0].value = &inarg;
+ req->in.args[1].size = entry->d_name.len + 1;
+ req->in.args[1].value = entry->d_name.name;
+ req->out.numargs = 2;
+ req->out.args[0].size = sizeof(outentry);
+ req->out.args[0].value = &outentry;
+ req->out.args[1].size = sizeof(outopen);
+ req->out.args[1].value = &outopen;
+ request_send(fc, req);
+ err = req->out.h.error;
+ if (err) {
+ if (err == -ENOSYS)
+ fc->no_create = 1;
+ goto out_free_ff;
+ }
+
+ err = -EIO;
+ if (!S_ISREG(outentry.attr.mode) || invalid_nodeid(outentry.nodeid))
+ goto out_free_ff;
+
+ inode = fuse_iget(dir->i_sb, outentry.nodeid, outentry.generation,
+ &outentry.attr);
+ err = -ENOMEM;
+ if (!inode) {
+ flags &= ~(O_CREAT | O_EXCL | O_TRUNC);
+ ff->fh = outopen.fh;
+ fuse_send_release(fc, ff, outentry.nodeid, NULL, flags, 0);
+ goto out_put_request;
+ }
+ fuse_put_request(fc, req);
+ d_instantiate(entry, inode);
+ fuse_change_timeout(entry, &outentry);
+ file = lookup_instantiate_filp(nd, entry, generic_file_open);
+ if (IS_ERR(file)) {
+ ff->fh = outopen.fh;
+ fuse_send_release(fc, ff, outentry.nodeid, inode, flags, 0);
+ return PTR_ERR(file);
+ }
+ fuse_finish_open(inode, file, ff, &outopen);
+ return 0;
+
+ out_free_ff:
+ fuse_file_free(ff);
+ out_put_request:
+ fuse_put_request(fc, req);
+ out:
+ return err;
+}
+
static int create_new_entry(struct fuse_conn *fc, struct fuse_req *req,
struct inode *dir, struct dentry *entry,
int mode)
{
struct fuse_entry_out outarg;
struct inode *inode;
- struct fuse_inode *fi;
int err;
req->in.h.nodeid = get_node_id(dir);
fuse_put_request(fc, req);
return err;
}
- if (!outarg.nodeid || outarg.nodeid == FUSE_ROOT_ID) {
+ if (invalid_nodeid(outarg.nodeid)) {
fuse_put_request(fc, req);
return -EIO;
}
fuse_put_request(fc, req);
/* Don't allow userspace to do really stupid things... */
- if ((inode->i_mode ^ mode) & S_IFMT) {
+ if (((inode->i_mode ^ mode) & S_IFMT) || dir_alias(inode)) {
iput(inode);
return -EIO;
}
- entry->d_time = time_to_jiffies(outarg.entry_valid,
- outarg.entry_valid_nsec);
-
- fi = get_fuse_inode(inode);
- fi->i_time = time_to_jiffies(outarg.attr_valid,
- outarg.attr_valid_nsec);
-
d_instantiate(entry, inode);
+ fuse_change_timeout(entry, &outarg);
fuse_invalidate_attr(dir);
return 0;
}
static int fuse_create(struct inode *dir, struct dentry *entry, int mode,
struct nameidata *nd)
{
+ if (nd && (nd->flags & LOOKUP_CREATE)) {
+ int err = fuse_create_open(dir, entry, mode, nd);
+ if (err != -ENOSYS)
+ return err;
+ /* Fall back on mknod */
+ }
return fuse_mknod(dir, entry, mode, 0);
}
return fuse_do_getattr(inode);
}
+static int fuse_access(struct inode *inode, int mask)
+{
+ struct fuse_conn *fc = get_fuse_conn(inode);
+ struct fuse_req *req;
+ struct fuse_access_in inarg;
+ int err;
+
+ if (fc->no_access)
+ return 0;
+
+ req = fuse_get_request(fc);
+ if (!req)
+ return -EINTR;
+
+ memset(&inarg, 0, sizeof(inarg));
+ inarg.mask = mask;
+ req->in.h.opcode = FUSE_ACCESS;
+ req->in.h.nodeid = get_node_id(inode);
+ req->inode = inode;
+ req->in.numargs = 1;
+ req->in.args[0].size = sizeof(inarg);
+ req->in.args[0].value = &inarg;
+ request_send(fc, req);
+ err = req->out.h.error;
+ fuse_put_request(fc, req);
+ if (err == -ENOSYS) {
+ fc->no_access = 1;
+ err = 0;
+ }
+ return err;
+}
+
static int fuse_permission(struct inode *inode, int mask, struct nameidata *nd)
{
struct fuse_conn *fc = get_fuse_conn(inode);
return err;
} else {
int mode = inode->i_mode;
- if ((mask & MAY_WRITE) && IS_RDONLY(inode) &&
- (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)))
- return -EROFS;
if ((mask & MAY_EXEC) && !S_ISDIR(mode) && !(mode & S_IXUGO))
return -EACCES;
+
+ if (nd && (nd->flags & LOOKUP_ACCESS))
+ return fuse_access(inode, mask);
return 0;
}
}
return file ? fuse_fsync_common(file, de, datasync, 1) : 0;
}
-static unsigned iattr_to_fattr(struct iattr *iattr, struct fuse_attr *fattr)
+static void iattr_to_fattr(struct iattr *iattr, struct fuse_setattr_in *arg)
{
unsigned ivalid = iattr->ia_valid;
- unsigned fvalid = 0;
-
- memset(fattr, 0, sizeof(*fattr));
if (ivalid & ATTR_MODE)
- fvalid |= FATTR_MODE, fattr->mode = iattr->ia_mode;
+ arg->valid |= FATTR_MODE, arg->mode = iattr->ia_mode;
if (ivalid & ATTR_UID)
- fvalid |= FATTR_UID, fattr->uid = iattr->ia_uid;
+ arg->valid |= FATTR_UID, arg->uid = iattr->ia_uid;
if (ivalid & ATTR_GID)
- fvalid |= FATTR_GID, fattr->gid = iattr->ia_gid;
+ arg->valid |= FATTR_GID, arg->gid = iattr->ia_gid;
if (ivalid & ATTR_SIZE)
- fvalid |= FATTR_SIZE, fattr->size = iattr->ia_size;
+ arg->valid |= FATTR_SIZE, arg->size = iattr->ia_size;
/* You can only _set_ these together (they may change by themselves) */
if ((ivalid & (ATTR_ATIME | ATTR_MTIME)) == (ATTR_ATIME | ATTR_MTIME)) {
- fvalid |= FATTR_ATIME | FATTR_MTIME;
- fattr->atime = iattr->ia_atime.tv_sec;
- fattr->mtime = iattr->ia_mtime.tv_sec;
+ arg->valid |= FATTR_ATIME | FATTR_MTIME;
+ arg->atime = iattr->ia_atime.tv_sec;
+ arg->mtime = iattr->ia_mtime.tv_sec;
+ }
+ if (ivalid & ATTR_FILE) {
+ struct fuse_file *ff = iattr->ia_file->private_data;
+ arg->valid |= FATTR_FH;
+ arg->fh = ff->fh;
}
-
- return fvalid;
}
static int fuse_setattr(struct dentry *entry, struct iattr *attr)
return -EINTR;
memset(&inarg, 0, sizeof(inarg));
- inarg.valid = iattr_to_fattr(attr, &inarg.attr);
+ iattr_to_fattr(attr, &inarg);
req->in.h.opcode = FUSE_SETATTR;
req->in.h.nodeid = get_node_id(inode);
req->inode = inode;
return err;
}
-static struct dentry *fuse_lookup(struct inode *dir, struct dentry *entry,
- struct nameidata *nd)
-{
- struct inode *inode;
- int err = fuse_lookup_iget(dir, entry, &inode);
- if (err)
- return ERR_PTR(err);
- if (inode && S_ISDIR(inode->i_mode)) {
- /* Don't allow creating an alias to a directory */
- struct dentry *alias = d_find_alias(inode);
- if (alias && !(alias->d_flags & DCACHE_DISCONNECTED)) {
- dput(alias);
- iput(inode);
- return ERR_PTR(-EIO);
- }
- }
- return d_splice_alias(inode, entry);
-}
-
static int fuse_setxattr(struct dentry *entry, const char *name,
const void *value, size_t size, int flags)
{
projects / karo-tx-linux.git / blobdiff