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path: root/fs/smb/server/vfs_cache.c
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Diffstat (limited to 'fs/smb/server/vfs_cache.c')
-rw-r--r--fs/smb/server/vfs_cache.c160
1 files changed, 146 insertions, 14 deletions
diff --git a/fs/smb/server/vfs_cache.c b/fs/smb/server/vfs_cache.c
index 4e82ff627d..8b2e37c871 100644
--- a/fs/smb/server/vfs_cache.c
+++ b/fs/smb/server/vfs_cache.c
@@ -165,7 +165,7 @@ static int ksmbd_inode_init(struct ksmbd_inode *ci, struct ksmbd_file *fp)
ci->m_fattr = 0;
INIT_LIST_HEAD(&ci->m_fp_list);
INIT_LIST_HEAD(&ci->m_op_list);
- rwlock_init(&ci->m_lock);
+ init_rwsem(&ci->m_lock);
ci->m_de = fp->filp->f_path.dentry;
return 0;
}
@@ -254,21 +254,22 @@ static void __ksmbd_inode_close(struct ksmbd_file *fp)
ci->m_flags &= ~S_DEL_ON_CLS_STREAM;
err = ksmbd_vfs_remove_xattr(file_mnt_idmap(filp),
&filp->f_path,
- fp->stream.name);
+ fp->stream.name,
+ true);
if (err)
pr_err("remove xattr failed : %s\n",
fp->stream.name);
}
if (atomic_dec_and_test(&ci->m_count)) {
- write_lock(&ci->m_lock);
+ down_write(&ci->m_lock);
if (ci->m_flags & (S_DEL_ON_CLS | S_DEL_PENDING)) {
ci->m_flags &= ~(S_DEL_ON_CLS | S_DEL_PENDING);
- write_unlock(&ci->m_lock);
+ up_write(&ci->m_lock);
ksmbd_vfs_unlink(filp);
- write_lock(&ci->m_lock);
+ down_write(&ci->m_lock);
}
- write_unlock(&ci->m_lock);
+ up_write(&ci->m_lock);
ksmbd_inode_free(ci);
}
@@ -289,9 +290,9 @@ static void __ksmbd_remove_fd(struct ksmbd_file_table *ft, struct ksmbd_file *fp
if (!has_file_id(fp->volatile_id))
return;
- write_lock(&fp->f_ci->m_lock);
+ down_write(&fp->f_ci->m_lock);
list_del_init(&fp->node);
- write_unlock(&fp->f_ci->m_lock);
+ up_write(&fp->f_ci->m_lock);
write_lock(&ft->lock);
idr_remove(ft->idr, fp->volatile_id);
@@ -305,7 +306,8 @@ static void __ksmbd_close_fd(struct ksmbd_file_table *ft, struct ksmbd_file *fp)
fd_limit_close();
__ksmbd_remove_durable_fd(fp);
- __ksmbd_remove_fd(ft, fp);
+ if (ft)
+ __ksmbd_remove_fd(ft, fp);
close_id_del_oplock(fp);
filp = fp->filp;
@@ -465,11 +467,32 @@ struct ksmbd_file *ksmbd_lookup_fd_slow(struct ksmbd_work *work, u64 id,
return fp;
}
-struct ksmbd_file *ksmbd_lookup_durable_fd(unsigned long long id)
+struct ksmbd_file *ksmbd_lookup_global_fd(unsigned long long id)
{
return __ksmbd_lookup_fd(&global_ft, id);
}
+struct ksmbd_file *ksmbd_lookup_durable_fd(unsigned long long id)
+{
+ struct ksmbd_file *fp;
+
+ fp = __ksmbd_lookup_fd(&global_ft, id);
+ if (fp && fp->conn) {
+ ksmbd_put_durable_fd(fp);
+ fp = NULL;
+ }
+
+ return fp;
+}
+
+void ksmbd_put_durable_fd(struct ksmbd_file *fp)
+{
+ if (!atomic_dec_and_test(&fp->refcount))
+ return;
+
+ __ksmbd_close_fd(NULL, fp);
+}
+
struct ksmbd_file *ksmbd_lookup_fd_cguid(char *cguid)
{
struct ksmbd_file *fp = NULL;
@@ -501,17 +524,17 @@ struct ksmbd_file *ksmbd_lookup_fd_inode(struct dentry *dentry)
if (!ci)
return NULL;
- read_lock(&ci->m_lock);
+ down_read(&ci->m_lock);
list_for_each_entry(lfp, &ci->m_fp_list, node) {
if (inode == file_inode(lfp->filp)) {
atomic_dec(&ci->m_count);
lfp = ksmbd_fp_get(lfp);
- read_unlock(&ci->m_lock);
+ up_read(&ci->m_lock);
return lfp;
}
}
atomic_dec(&ci->m_count);
- read_unlock(&ci->m_lock);
+ up_read(&ci->m_lock);
return NULL;
}
@@ -639,6 +662,32 @@ __close_file_table_ids(struct ksmbd_file_table *ft,
return num;
}
+static inline bool is_reconnectable(struct ksmbd_file *fp)
+{
+ struct oplock_info *opinfo = opinfo_get(fp);
+ bool reconn = false;
+
+ if (!opinfo)
+ return false;
+
+ if (opinfo->op_state != OPLOCK_STATE_NONE) {
+ opinfo_put(opinfo);
+ return false;
+ }
+
+ if (fp->is_resilient || fp->is_persistent)
+ reconn = true;
+ else if (fp->is_durable && opinfo->is_lease &&
+ opinfo->o_lease->state & SMB2_LEASE_HANDLE_CACHING_LE)
+ reconn = true;
+
+ else if (fp->is_durable && opinfo->level == SMB2_OPLOCK_LEVEL_BATCH)
+ reconn = true;
+
+ opinfo_put(opinfo);
+ return reconn;
+}
+
static bool tree_conn_fd_check(struct ksmbd_tree_connect *tcon,
struct ksmbd_file *fp)
{
@@ -648,7 +697,28 @@ static bool tree_conn_fd_check(struct ksmbd_tree_connect *tcon,
static bool session_fd_check(struct ksmbd_tree_connect *tcon,
struct ksmbd_file *fp)
{
- return false;
+ struct ksmbd_inode *ci;
+ struct oplock_info *op;
+ struct ksmbd_conn *conn;
+
+ if (!is_reconnectable(fp))
+ return false;
+
+ conn = fp->conn;
+ ci = fp->f_ci;
+ down_write(&ci->m_lock);
+ list_for_each_entry_rcu(op, &ci->m_op_list, op_entry) {
+ if (op->conn != conn)
+ continue;
+ op->conn = NULL;
+ }
+ up_write(&ci->m_lock);
+
+ fp->conn = NULL;
+ fp->tcon = NULL;
+ fp->volatile_id = KSMBD_NO_FID;
+
+ return true;
}
void ksmbd_close_tree_conn_fds(struct ksmbd_work *work)
@@ -687,6 +757,68 @@ void ksmbd_free_global_file_table(void)
ksmbd_destroy_file_table(&global_ft);
}
+int ksmbd_validate_name_reconnect(struct ksmbd_share_config *share,
+ struct ksmbd_file *fp, char *name)
+{
+ char *pathname, *ab_pathname;
+ int ret = 0;
+
+ pathname = kmalloc(PATH_MAX, GFP_KERNEL);
+ if (!pathname)
+ return -EACCES;
+
+ ab_pathname = d_path(&fp->filp->f_path, pathname, PATH_MAX);
+ if (IS_ERR(ab_pathname)) {
+ kfree(pathname);
+ return -EACCES;
+ }
+
+ if (name && strcmp(&ab_pathname[share->path_sz + 1], name)) {
+ ksmbd_debug(SMB, "invalid name reconnect %s\n", name);
+ ret = -EINVAL;
+ }
+
+ kfree(pathname);
+
+ return ret;
+}
+
+int ksmbd_reopen_durable_fd(struct ksmbd_work *work, struct ksmbd_file *fp)
+{
+ struct ksmbd_inode *ci;
+ struct oplock_info *op;
+
+ if (!fp->is_durable || fp->conn || fp->tcon) {
+ pr_err("Invalid durable fd [%p:%p]\n", fp->conn, fp->tcon);
+ return -EBADF;
+ }
+
+ if (has_file_id(fp->volatile_id)) {
+ pr_err("Still in use durable fd: %llu\n", fp->volatile_id);
+ return -EBADF;
+ }
+
+ fp->conn = work->conn;
+ fp->tcon = work->tcon;
+
+ ci = fp->f_ci;
+ down_write(&ci->m_lock);
+ list_for_each_entry_rcu(op, &ci->m_op_list, op_entry) {
+ if (op->conn)
+ continue;
+ op->conn = fp->conn;
+ }
+ up_write(&ci->m_lock);
+
+ __open_id(&work->sess->file_table, fp, OPEN_ID_TYPE_VOLATILE_ID);
+ if (!has_file_id(fp->volatile_id)) {
+ fp->conn = NULL;
+ fp->tcon = NULL;
+ return -EBADF;
+ }
+ return 0;
+}
+
int ksmbd_init_file_table(struct ksmbd_file_table *ft)
{
ft->idr = kzalloc(sizeof(struct idr), GFP_KERNEL);