+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Copyright (c) 2018-2024 Oracle. All Rights Reserved.
- * Author: Darrick J. Wong <djwong@kernel.org>
- */
-#include "libxfs_priv.h"
-#include "xfs_fs.h"
-#include "xfs_shared.h"
-#include "xfs_format.h"
-#include "xfs_log_format.h"
-#include "xfs_da_format.h"
-#include "xfs_trans_resv.h"
-#include "xfs_trans_space.h"
-#include "xfs_mount.h"
-#include "xfs_trans.h"
-#include "xfs_inode.h"
-#include "xfs_da_btree.h"
-#include "xfs_bmap_btree.h"
-#include "xfs_bit.h"
-#include "xfs_sb.h"
-#include "xfs_imeta.h"
-#include "xfs_trace.h"
-#include "xfs_parent.h"
-#include "xfs_health.h"
-#include "imeta_utils.h"
-
-/* Initialize a metadata update structure. */
-static inline int
-xfs_imeta_init(
- struct xfs_mount *mp,
- const struct xfs_imeta_path *path,
- struct xfs_imeta_update *upd)
-{
- struct xfs_trans *tp;
- int error;
-
- memset(upd, 0, sizeof(struct xfs_imeta_update));
- upd->mp = mp;
- upd->path = path;
-
- if (!xfs_has_metadir(mp))
- return 0;
-
- /*
- * Find the parent of the last path component. If the parent path does
- * not exist, we consider this corruption because paths are supposed
- * to exist. For example, if the path is /quota/user, we require that
- * /quota already exists.
- */
- error = xfs_trans_alloc_empty(mp, &tp);
- if (error)
- return error;
- error = xfs_imeta_dir_parent(tp, upd->path, &upd->dp);
- xfs_trans_cancel(tp);
- if (error == -ENOENT) {
- xfs_fs_mark_sick(mp, XFS_SICK_FS_METADIR);
- return -EFSCORRUPTED;
- }
- if (error)
- return error;
-
- return xfs_parent_start(mp, &upd->ppargs);
-}
-
-/*
- * Unlock and release resources after committing (or cancelling) a metadata
- * directory tree operation. The caller retains its reference to @upd->ip
- * and must release it explicitly.
- */
-static inline void
-xfs_imeta_teardown(
- struct xfs_imeta_update *upd,
- int error)
-{
- trace_xfs_imeta_teardown(upd, error);
-
- if (upd->ppargs) {
- xfs_parent_finish(upd->mp, upd->ppargs);
- upd->ppargs = NULL;
- }
-
- if (upd->ip) {
- if (upd->ip_locked)
- xfs_iunlock(upd->ip, XFS_ILOCK_EXCL);
- upd->ip_locked = false;
- }
-
- if (upd->dp) {
- if (upd->dp_locked)
- xfs_iunlock(upd->dp, XFS_ILOCK_EXCL);
- upd->dp_locked = false;
-
- xfs_imeta_irele(upd->dp);
- upd->dp = NULL;
- }
-}
-
-/*
- * Begin the process of creating a metadata file by allocating transactions
- * and taking whatever resources we're going to need.
- */
-int
-xfs_imeta_start_create(
- struct xfs_mount *mp,
- const struct xfs_imeta_path *path,
- struct xfs_imeta_update *upd)
-{
- int error;
-
- error = xfs_imeta_init(mp, path, upd);
- if (error)
- return error;
-
- error = xfs_trans_alloc(mp, &M_RES(mp)->tr_imeta_create,
- xfs_create_space_res(mp, MAXNAMELEN), 0, 0, &upd->tp);
- if (error)
- goto out_teardown;
-
- /*
- * Lock the parent directory if there is one. We can't ijoin it to
- * the transaction until after the child file has been created.
- */
- if (upd->dp) {
- xfs_ilock(upd->dp, XFS_ILOCK_EXCL | XFS_ILOCK_PARENT);
- upd->dp_locked = true;
- }
-
- trace_xfs_imeta_start_create(upd);
- return 0;
-out_teardown:
- xfs_imeta_teardown(upd, error);
- return error;
-}
-
-/*
- * Begin the process of linking a metadata file by allocating transactions
- * and locking whatever resources we're going to need.
- */
-static inline int
-xfs_imeta_start_dir_update(
- struct xfs_mount *mp,
- const struct xfs_imeta_path *path,
- struct xfs_inode *ip,
- struct xfs_trans_res *tr_resv,
- unsigned int resblks,
- struct xfs_imeta_update *upd)
-{
- int error;
-
- error = xfs_imeta_init(mp, path, upd);
- if (error)
- return error;
-
- upd->ip = ip;
-
- if (upd->dp) {
- error = xfs_trans_alloc_dir(upd->dp, tr_resv, upd->ip,
- resblks, &upd->tp);
- if (error)
- goto out_teardown;
-
- upd->dp_locked = true;
- } else {
- error = xfs_trans_alloc_inode(upd->ip, tr_resv, resblks, 0,
- false, &upd->tp);
- if (error)
- goto out_teardown;
- }
-
- upd->ip_locked = true;
- return 0;
-out_teardown:
- xfs_imeta_teardown(upd, error);
- return error;
-}
-
-/*
- * Begin the process of linking a metadata file by allocating transactions
- * and locking whatever resources we're going to need.
- */
-int
-xfs_imeta_start_link(
- struct xfs_mount *mp,
- const struct xfs_imeta_path *path,
- struct xfs_inode *ip,
- struct xfs_imeta_update *upd)
-{
- int error;
-
- error = xfs_imeta_start_dir_update(mp, path, ip,
- &M_RES(mp)->tr_imeta_link,
- xfs_link_space_res(mp, MAXNAMELEN), upd);
- if (error)
- return error;
-
- trace_xfs_imeta_start_link(upd);
- return 0;
-}
-
-/*
- * Begin the process of unlinking a metadata file by allocating transactions
- * and locking whatever resources we're going to need.
- */
-int
-xfs_imeta_start_unlink(
- struct xfs_mount *mp,
- const struct xfs_imeta_path *path,
- struct xfs_inode *ip,
- struct xfs_imeta_update *upd)
-{
- int error;
-
- error = xfs_imeta_start_dir_update(mp, path, ip,
- &M_RES(mp)->tr_imeta_unlink,
- xfs_remove_space_res(mp, MAXNAMELEN), upd);
- if (error)
- return error;
-
- trace_xfs_imeta_start_unlink(upd);
- return 0;
-}
-
-/* Commit a metadir update and unlock/drop all resources. */
-int
-xfs_imeta_commit_update(
- struct xfs_imeta_update *upd)
-{
- int error;
-
- trace_xfs_imeta_update_commit(upd);
-
- error = xfs_trans_commit(upd->tp);
- upd->tp = NULL;
-
- xfs_imeta_teardown(upd, error);
- return error;
-}
-
-/* Cancel a metadir update and unlock/drop all resources. */
-void
-xfs_imeta_cancel_update(
- struct xfs_imeta_update *upd,
- int error)
-{
- trace_xfs_imeta_update_cancel(upd);
-
- xfs_trans_cancel(upd->tp);
- upd->tp = NULL;
-
- xfs_imeta_teardown(upd, error);
-}
-
-/* Create a metadata for the last component of the path. */
-STATIC int
-xfs_imeta_mkdir(
- struct xfs_mount *mp,
- const struct xfs_imeta_path *path)
-{
- struct xfs_imeta_update upd;
- struct xfs_inode *ip = NULL;
- int error;
-
- if (xfs_is_shutdown(mp))
- return -EIO;
-
- /* Allocate a transaction to create the last directory. */
- error = xfs_imeta_start_create(mp, path, &upd);
- if (error)
- return error;
-
- /* Create the subdirectory and take our reference. */
- error = xfs_imeta_create(&upd, S_IFDIR, &ip);
- if (error)
- goto out_cancel;
-
- error = xfs_imeta_commit_update(&upd);
-
- /*
- * We don't pass the directory we just created to the caller, so finish
- * setting up the inode, then release the dir and the dquots.
- */
- goto out_irele;
-
-out_cancel:
- xfs_imeta_cancel_update(&upd, error);
-out_irele:
- /* Have to finish setting up the inode to ensure it's deleted. */
- if (ip)
- xfs_irele(ip);
- return error;
-}
-
-/*
- * Make sure that every metadata directory path component exists and is a
- * directory.
- */
-int
-xfs_imeta_ensure_dirpath(
- struct xfs_mount *mp,
- const struct xfs_imeta_path *path)
-{
- struct xfs_imeta_path temp_path = {
- .im_path = path->im_path,
- .im_depth = 1,
- .im_ftype = XFS_DIR3_FT_DIR,
- };
- unsigned int i;
- int error = 0;
-
- if (!xfs_has_metadir(mp))
- return 0;
-
- for (i = 0; i < path->im_depth - 1; i++, temp_path.im_depth++) {
- error = xfs_imeta_mkdir(mp, &temp_path);
- if (error && error != -EEXIST)
- return error;
- }
-
- return 0;
-}
projects / users / hch / xfsprogs.git / commitdiff