+// SPDX-License-Identifier: GPL-2.0
+#ifndef NO_BCACHEFS_FS
#include "bcachefs.h"
#include "acl.h"
+#include "bkey_buf.h"
#include "btree_update.h"
#include "buckets.h"
#include "chardev.h"
#include "dirent.h"
+#include "errcode.h"
#include "extents.h"
#include "fs.h"
+#include "fs-common.h"
#include "fs-io.h"
+#include "fs-ioctl.h"
+#include "fs-io-buffered.h"
+#include "fs-io-direct.h"
+#include "fs-io-pagecache.h"
#include "fsck.h"
#include "inode.h"
+#include "io_read.h"
#include "journal.h"
#include "keylist.h"
+#include "quota.h"
+#include "snapshot.h"
#include "super.h"
#include "xattr.h"
#include <linux/aio.h>
#include <linux/backing-dev.h>
-#include <linux/compat.h>
+#include <linux/exportfs.h>
+#include <linux/fiemap.h>
#include <linux/module.h>
-#include <linux/mount.h>
+#include <linux/pagemap.h>
+#include <linux/posix_acl.h>
#include <linux/random.h>
+#include <linux/seq_file.h>
#include <linux/statfs.h>
+#include <linux/string.h>
#include <linux/xattr.h>
static struct kmem_cache *bch2_inode_cache;
-static void bch2_vfs_inode_init(struct bch_fs *,
+static void bch2_vfs_inode_init(struct btree_trans *, subvol_inum,
struct bch_inode_info *,
- struct bch_inode_unpacked *);
+ struct bch_inode_unpacked *,
+ struct bch_subvolume *);
-/*
- * I_SIZE_DIRTY requires special handling:
- *
- * To the recovery code, the flag means that there is stale data past i_size
- * that needs to be deleted; it's used for implementing atomic appends and
- * truncates.
- *
- * On append, we set I_SIZE_DIRTY before doing the write, then after the write
- * we clear I_SIZE_DIRTY atomically with updating i_size to the new larger size
- * that exposes the data we just wrote.
- *
- * On truncate, it's the reverse: We set I_SIZE_DIRTY atomically with setting
- * i_size to the new smaller size, then we delete the data that we just made
- * invisible, and then we clear I_SIZE_DIRTY.
- *
- * Because there can be multiple appends in flight at a time, we need a refcount
- * (i_size_dirty_count) instead of manipulating the flag directly. Nonzero
- * refcount means I_SIZE_DIRTY is set, zero means it's cleared.
- *
- * Because write_inode() can be called at any time, i_size_dirty_count means
- * something different to the runtime code - it means to write_inode() "don't
- * update i_size yet".
- *
- * We don't clear I_SIZE_DIRTY directly, we let write_inode() clear it when
- * i_size_dirty_count is zero - but the reverse is not true, I_SIZE_DIRTY must
- * be set explicitly.
- */
+void bch2_inode_update_after_write(struct btree_trans *trans,
+ struct bch_inode_info *inode,
+ struct bch_inode_unpacked *bi,
+ unsigned fields)
+{
+ struct bch_fs *c = trans->c;
+
+ BUG_ON(bi->bi_inum != inode->v.i_ino);
+
+ bch2_assert_pos_locked(trans, BTREE_ID_inodes,
+ POS(0, bi->bi_inum),
+ c->opts.inodes_use_key_cache);
+
+ set_nlink(&inode->v, bch2_inode_nlink_get(bi));
+ i_uid_write(&inode->v, bi->bi_uid);
+ i_gid_write(&inode->v, bi->bi_gid);
+ inode->v.i_mode = bi->bi_mode;
+
+ if (fields & ATTR_ATIME)
+ inode_set_atime_to_ts(&inode->v, bch2_time_to_timespec(c, bi->bi_atime));
+ if (fields & ATTR_MTIME)
+ inode_set_mtime_to_ts(&inode->v, bch2_time_to_timespec(c, bi->bi_mtime));
+ if (fields & ATTR_CTIME)
+ inode_set_ctime_to_ts(&inode->v, bch2_time_to_timespec(c, bi->bi_ctime));
-int __must_check __bch2_write_inode(struct bch_fs *c,
- struct bch_inode_info *ei,
- inode_set_fn set,
- void *p)
+ inode->ei_inode = *bi;
+
+ bch2_inode_flags_to_vfs(inode);
+}
+
+int __must_check bch2_write_inode(struct bch_fs *c,
+ struct bch_inode_info *inode,
+ inode_set_fn set,
+ void *p, unsigned fields)
{
- struct btree_iter iter;
- struct inode *inode = &ei->vfs_inode;
+ struct btree_trans *trans = bch2_trans_get(c);
+ struct btree_iter iter = { NULL };
struct bch_inode_unpacked inode_u;
- struct bkey_inode_buf inode_p;
- u64 inum = inode->i_ino;
- unsigned i_nlink = READ_ONCE(inode->i_nlink);
int ret;
+retry:
+ bch2_trans_begin(trans);
+
+ ret = bch2_inode_peek(trans, &iter, &inode_u, inode_inum(inode),
+ BTREE_ITER_INTENT) ?:
+ (set ? set(trans, inode, &inode_u, p) : 0) ?:
+ bch2_inode_write(trans, &iter, &inode_u) ?:
+ bch2_trans_commit(trans, NULL, NULL, BCH_TRANS_COMMIT_no_enospc);
/*
- * We can't write an inode with i_nlink == 0 because it's stored biased;
- * however, we don't need to because if i_nlink is 0 the inode is
- * getting deleted when it's evicted.
+ * the btree node lock protects inode->ei_inode, not ei_update_lock;
+ * this is important for inode updates via bchfs_write_index_update
*/
- if (!i_nlink)
- return 0;
+ if (!ret)
+ bch2_inode_update_after_write(trans, inode, &inode_u, fields);
- lockdep_assert_held(&ei->update_lock);
+ bch2_trans_iter_exit(trans, &iter);
- bch2_btree_iter_init(&iter, c, BTREE_ID_INODES, POS(inum, 0),
- BTREE_ITER_INTENT);
+ if (bch2_err_matches(ret, BCH_ERR_transaction_restart))
+ goto retry;
- do {
- struct bkey_s_c k = bch2_btree_iter_peek_with_holes(&iter);
+ bch2_fs_fatal_err_on(bch2_err_matches(ret, ENOENT), c,
+ "inode %u:%llu not found when updating",
+ inode_inum(inode).subvol,
+ inode_inum(inode).inum);
- if ((ret = btree_iter_err(k)))
- goto out;
-
- if (WARN_ONCE(k.k->type != BCH_INODE_FS,
- "inode %llu not found when updating", inum)) {
- bch2_btree_iter_unlock(&iter);
- return -ENOENT;
- }
+ bch2_trans_put(trans);
+ return ret < 0 ? ret : 0;
+}
- ret = bch2_inode_unpack(bkey_s_c_to_inode(k), &inode_u);
- if (WARN_ONCE(ret,
- "error %i unpacking inode %llu", ret, inum)) {
- ret = -ENOENT;
- break;
- }
+int bch2_fs_quota_transfer(struct bch_fs *c,
+ struct bch_inode_info *inode,
+ struct bch_qid new_qid,
+ unsigned qtypes,
+ enum quota_acct_mode mode)
+{
+ unsigned i;
+ int ret;
- if (set) {
- ret = set(ei, &inode_u, p);
- if (ret)
- goto out;
- }
+ qtypes &= enabled_qtypes(c);
- BUG_ON(i_nlink < nlink_bias(inode->i_mode));
+ for (i = 0; i < QTYP_NR; i++)
+ if (new_qid.q[i] == inode->ei_qid.q[i])
+ qtypes &= ~(1U << i);
- inode_u.i_mode = inode->i_mode;
- inode_u.i_uid = i_uid_read(inode);
- inode_u.i_gid = i_gid_read(inode);
- inode_u.i_nlink = i_nlink - nlink_bias(inode->i_mode);
- inode_u.i_dev = inode->i_rdev;
- inode_u.i_atime = timespec_to_bch2_time(c, inode->i_atime);
- inode_u.i_mtime = timespec_to_bch2_time(c, inode->i_mtime);
- inode_u.i_ctime = timespec_to_bch2_time(c, inode->i_ctime);
+ if (!qtypes)
+ return 0;
- bch2_inode_pack(&inode_p, &inode_u);
+ mutex_lock(&inode->ei_quota_lock);
- ret = bch2_btree_insert_at(c, NULL, NULL, &ei->journal_seq,
- BTREE_INSERT_ATOMIC|
- BTREE_INSERT_NOFAIL,
- BTREE_INSERT_ENTRY(&iter, &inode_p.inode.k_i));
- } while (ret == -EINTR);
+ ret = bch2_quota_transfer(c, qtypes, new_qid,
+ inode->ei_qid,
+ inode->v.i_blocks +
+ inode->ei_quota_reserved,
+ mode);
+ if (!ret)
+ for (i = 0; i < QTYP_NR; i++)
+ if (qtypes & (1 << i))
+ inode->ei_qid.q[i] = new_qid.q[i];
- if (!ret) {
- ei->i_size = inode_u.i_size;
- ei->i_flags = inode_u.i_flags;
- }
-out:
- bch2_btree_iter_unlock(&iter);
+ mutex_unlock(&inode->ei_quota_lock);
- return ret < 0 ? ret : 0;
+ return ret;
}
-int __must_check bch2_write_inode(struct bch_fs *c,
- struct bch_inode_info *ei)
+static int bch2_iget5_test(struct inode *vinode, void *p)
{
- return __bch2_write_inode(c, ei, NULL, NULL);
+ struct bch_inode_info *inode = to_bch_ei(vinode);
+ subvol_inum *inum = p;
+
+ return inode->ei_subvol == inum->subvol &&
+ inode->ei_inode.bi_inum == inum->inum;
}
-int bch2_inc_nlink(struct bch_fs *c, struct bch_inode_info *ei)
+static int bch2_iget5_set(struct inode *vinode, void *p)
{
- int ret;
-
- mutex_lock(&ei->update_lock);
- inc_nlink(&ei->vfs_inode);
- ret = bch2_write_inode(c, ei);
- mutex_unlock(&ei->update_lock);
+ struct bch_inode_info *inode = to_bch_ei(vinode);
+ subvol_inum *inum = p;
- return ret;
+ inode->v.i_ino = inum->inum;
+ inode->ei_subvol = inum->subvol;
+ inode->ei_inode.bi_inum = inum->inum;
+ return 0;
}
-int bch2_dec_nlink(struct bch_fs *c, struct bch_inode_info *ei)
+static unsigned bch2_inode_hash(subvol_inum inum)
{
- int ret = 0;
+ return jhash_3words(inum.subvol, inum.inum >> 32, inum.inum, JHASH_INITVAL);
+}
- mutex_lock(&ei->update_lock);
- drop_nlink(&ei->vfs_inode);
- ret = bch2_write_inode(c, ei);
- mutex_unlock(&ei->update_lock);
+static struct bch_inode_info *bch2_inode_insert(struct bch_fs *c, struct bch_inode_info *inode)
+{
+ subvol_inum inum = inode_inum(inode);
+ struct bch_inode_info *old = to_bch_ei(inode_insert5(&inode->v,
+ bch2_inode_hash(inum),
+ bch2_iget5_test,
+ bch2_iget5_set,
+ &inum));
+ BUG_ON(!old);
+
+ if (unlikely(old != inode)) {
+ discard_new_inode(&inode->v);
+ inode = old;
+ } else {
+ mutex_lock(&c->vfs_inodes_lock);
+ list_add(&inode->ei_vfs_inode_list, &c->vfs_inodes_list);
+ mutex_unlock(&c->vfs_inodes_lock);
+ /*
+ * we really don't want insert_inode_locked2() to be setting
+ * I_NEW...
+ */
+ unlock_new_inode(&inode->v);
+ }
- return ret;
+ return inode;
}
-static struct inode *bch2_vfs_inode_get(struct super_block *sb, u64 inum)
-{
- struct bch_fs *c = sb->s_fs_info;
- struct inode *inode;
- struct bch_inode_unpacked inode_u;
- struct bch_inode_info *ei;
- int ret;
+#define memalloc_flags_do(_flags, _do) \
+({ \
+ unsigned _saved_flags = memalloc_flags_save(_flags); \
+ typeof(_do) _ret = _do; \
+ memalloc_noreclaim_restore(_saved_flags); \
+ _ret; \
+})
- pr_debug("inum %llu", inum);
+/*
+ * Allocate a new inode, dropping/retaking btree locks if necessary:
+ */
+static struct bch_inode_info *bch2_new_inode(struct btree_trans *trans)
+{
+ struct bch_fs *c = trans->c;
- inode = iget_locked(sb, inum);
- if (unlikely(!inode))
- return ERR_PTR(-ENOMEM);
- if (!(inode->i_state & I_NEW))
- return inode;
+ struct bch_inode_info *inode =
+ memalloc_flags_do(PF_MEMALLOC_NORECLAIM|PF_MEMALLOC_NOWARN,
+ to_bch_ei(new_inode(c->vfs_sb)));
- ret = bch2_inode_find_by_inum(c, inum, &inode_u);
- if (ret) {
- iget_failed(inode);
- return ERR_PTR(ret);
+ if (unlikely(!inode)) {
+ int ret = drop_locks_do(trans, (inode = to_bch_ei(new_inode(c->vfs_sb))) ? 0 : -ENOMEM);
+ if (ret && inode)
+ discard_new_inode(&inode->v);
+ if (ret)
+ return ERR_PTR(ret);
}
- ei = to_bch_ei(inode);
- bch2_vfs_inode_init(c, ei, &inode_u);
+ return inode;
+}
- ei->journal_seq = bch2_inode_journal_seq(&c->journal, inum);
+struct inode *bch2_vfs_inode_get(struct bch_fs *c, subvol_inum inum)
+{
+ struct bch_inode_info *inode =
+ to_bch_ei(ilookup5_nowait(c->vfs_sb,
+ bch2_inode_hash(inum),
+ bch2_iget5_test,
+ &inum));
+ if (inode)
+ return &inode->v;
- unlock_new_inode(inode);
+ struct btree_trans *trans = bch2_trans_get(c);
- return inode;
+ struct bch_inode_unpacked inode_u;
+ struct bch_subvolume subvol;
+ int ret = lockrestart_do(trans,
+ bch2_subvolume_get(trans, inum.subvol, true, 0, &subvol) ?:
+ bch2_inode_find_by_inum_trans(trans, inum, &inode_u)) ?:
+ PTR_ERR_OR_ZERO(inode = bch2_new_inode(trans));
+ if (!ret) {
+ bch2_vfs_inode_init(trans, inum, inode, &inode_u, &subvol);
+ inode = bch2_inode_insert(c, inode);
+ }
+ bch2_trans_put(trans);
+
+ return ret ? ERR_PTR(ret) : &inode->v;
}
-static struct inode *bch2_vfs_inode_create(struct bch_fs *c,
- struct inode *parent,
- umode_t mode, dev_t rdev)
+struct bch_inode_info *
+__bch2_create(struct mnt_idmap *idmap,
+ struct bch_inode_info *dir, struct dentry *dentry,
+ umode_t mode, dev_t rdev, subvol_inum snapshot_src,
+ unsigned flags)
{
- struct inode *inode;
- struct posix_acl *default_acl = NULL, *acl = NULL;
- struct bch_inode_info *ei;
+ struct bch_fs *c = dir->v.i_sb->s_fs_info;
+ struct btree_trans *trans;
+ struct bch_inode_unpacked dir_u;
+ struct bch_inode_info *inode;
struct bch_inode_unpacked inode_u;
- struct bkey_inode_buf inode_p;
+ struct posix_acl *default_acl = NULL, *acl = NULL;
+ subvol_inum inum;
+ struct bch_subvolume subvol;
+ u64 journal_seq = 0;
int ret;
- inode = new_inode(parent->i_sb);
- if (unlikely(!inode))
- return ERR_PTR(-ENOMEM);
-
- inode_init_owner(inode, parent, mode);
-
- ret = posix_acl_create(parent, &inode->i_mode, &default_acl, &acl);
- if (ret) {
- make_bad_inode(inode);
+ /*
+ * preallocate acls + vfs inode before btree transaction, so that
+ * nothing can fail after the transaction succeeds:
+ */
+#ifdef CONFIG_BCACHEFS_POSIX_ACL
+ ret = posix_acl_create(&dir->v, &mode, &default_acl, &acl);
+ if (ret)
+ return ERR_PTR(ret);
+#endif
+ inode = to_bch_ei(new_inode(c->vfs_sb));
+ if (unlikely(!inode)) {
+ inode = ERR_PTR(-ENOMEM);
goto err;
}
- ei = to_bch_ei(inode);
+ bch2_inode_init_early(c, &inode_u);
+
+ if (!(flags & BCH_CREATE_TMPFILE))
+ mutex_lock(&dir->ei_update_lock);
+
+ trans = bch2_trans_get(c);
+retry:
+ bch2_trans_begin(trans);
+
+ ret = bch2_subvol_is_ro_trans(trans, dir->ei_subvol) ?:
+ bch2_create_trans(trans,
+ inode_inum(dir), &dir_u, &inode_u,
+ !(flags & BCH_CREATE_TMPFILE)
+ ? &dentry->d_name : NULL,
+ from_kuid(i_user_ns(&dir->v), current_fsuid()),
+ from_kgid(i_user_ns(&dir->v), current_fsgid()),
+ mode, rdev,
+ default_acl, acl, snapshot_src, flags) ?:
+ bch2_quota_acct(c, bch_qid(&inode_u), Q_INO, 1,
+ KEY_TYPE_QUOTA_PREALLOC);
+ if (unlikely(ret))
+ goto err_before_quota;
- bch2_inode_init(c, &inode_u, i_uid_read(inode),
- i_gid_read(inode), inode->i_mode, rdev);
- bch2_inode_pack(&inode_p, &inode_u);
+ inum.subvol = inode_u.bi_subvol ?: dir->ei_subvol;
+ inum.inum = inode_u.bi_inum;
- ret = bch2_inode_create(c, &inode_p.inode.k_i,
- BLOCKDEV_INODE_MAX, 0,
- &c->unused_inode_hint);
+ ret = bch2_subvolume_get(trans, inum.subvol, true,
+ BTREE_ITER_WITH_UPDATES, &subvol) ?:
+ bch2_trans_commit(trans, NULL, &journal_seq, 0);
if (unlikely(ret)) {
- /*
- * indicate to bch_evict_inode that the inode was never actually
- * created:
- */
- make_bad_inode(inode);
- goto err;
+ bch2_quota_acct(c, bch_qid(&inode_u), Q_INO, -1,
+ KEY_TYPE_QUOTA_WARN);
+err_before_quota:
+ if (bch2_err_matches(ret, BCH_ERR_transaction_restart))
+ goto retry;
+ goto err_trans;
}
- inode_u.inum = inode_p.inode.k.p.inode;
- bch2_vfs_inode_init(c, ei, &inode_u);
-
- if (default_acl) {
- ret = bch2_set_acl(inode, default_acl, ACL_TYPE_DEFAULT);
- if (unlikely(ret))
- goto err;
+ if (!(flags & BCH_CREATE_TMPFILE)) {
+ bch2_inode_update_after_write(trans, dir, &dir_u,
+ ATTR_MTIME|ATTR_CTIME);
+ mutex_unlock(&dir->ei_update_lock);
}
- if (acl) {
- ret = bch2_set_acl(inode, acl, ACL_TYPE_ACCESS);
- if (unlikely(ret))
- goto err;
- }
+ bch2_vfs_inode_init(trans, inum, inode, &inode_u, &subvol);
- insert_inode_hash(inode);
- atomic_long_inc(&c->nr_inodes);
-out:
+ set_cached_acl(&inode->v, ACL_TYPE_ACCESS, acl);
+ set_cached_acl(&inode->v, ACL_TYPE_DEFAULT, default_acl);
+
+ /*
+ * we must insert the new inode into the inode cache before calling
+ * bch2_trans_exit() and dropping locks, else we could race with another
+ * thread pulling the inode in and modifying it:
+ */
+ inode = bch2_inode_insert(c, inode);
+ bch2_trans_put(trans);
+err:
posix_acl_release(default_acl);
posix_acl_release(acl);
return inode;
-err:
- clear_nlink(inode);
- iput(inode);
+err_trans:
+ if (!(flags & BCH_CREATE_TMPFILE))
+ mutex_unlock(&dir->ei_update_lock);
+
+ bch2_trans_put(trans);
+ make_bad_inode(&inode->v);
+ iput(&inode->v);
inode = ERR_PTR(ret);
- goto out;
+ goto err;
}
-static int bch2_vfs_dirent_create(struct bch_fs *c, struct inode *dir,
- u8 type, const struct qstr *name,
- struct inode *dst)
-{
- struct bch_inode_info *dir_ei = to_bch_ei(dir);
- int ret;
+/* methods */
- ret = bch2_dirent_create(c, dir->i_ino, &dir_ei->str_hash,
- type, name, dst->i_ino,
- &dir_ei->journal_seq,
- BCH_HASH_SET_MUST_CREATE);
- if (unlikely(ret))
- return ret;
+static struct bch_inode_info *bch2_lookup_trans(struct btree_trans *trans,
+ subvol_inum dir, struct bch_hash_info *dir_hash_info,
+ const struct qstr *name)
+{
+ struct bch_fs *c = trans->c;
+ struct btree_iter dirent_iter = {};
+ subvol_inum inum = {};
- dir->i_mtime = dir->i_ctime = current_fs_time(dir->i_sb);
- mark_inode_dirty_sync(dir);
- return 0;
-}
+ int ret = bch2_hash_lookup(trans, &dirent_iter, bch2_dirent_hash_desc,
+ dir_hash_info, dir, name, 0);
+ if (ret)
+ return ERR_PTR(ret);
-static int __bch2_create(struct inode *dir, struct dentry *dentry,
- umode_t mode, dev_t rdev)
-{
- struct bch_inode_info *dir_ei = to_bch_ei(dir);
- struct bch_fs *c = dir->i_sb->s_fs_info;
- struct inode *inode;
- struct bch_inode_info *ei;
- int ret;
+ struct bkey_s_c k = bch2_btree_iter_peek_slot(&dirent_iter);
+ ret = bkey_err(k);
+ if (ret)
+ goto err;
- inode = bch2_vfs_inode_create(c, dir, mode, rdev);
- if (unlikely(IS_ERR(inode)))
- return PTR_ERR(inode);
+ ret = bch2_dirent_read_target(trans, dir, bkey_s_c_to_dirent(k), &inum);
+ if (ret > 0)
+ ret = -ENOENT;
+ if (ret)
+ goto err;
- ei = to_bch_ei(inode);
+ struct bch_inode_info *inode =
+ to_bch_ei(ilookup5_nowait(c->vfs_sb,
+ bch2_inode_hash(inum),
+ bch2_iget5_test,
+ &inum));
+ if (inode)
+ goto out;
- ret = bch2_vfs_dirent_create(c, dir, mode_to_type(mode),
- &dentry->d_name, inode);
- if (unlikely(ret)) {
- clear_nlink(inode);
- iput(inode);
- return ret;
+ struct bch_subvolume subvol;
+ struct bch_inode_unpacked inode_u;
+ ret = bch2_subvolume_get(trans, inum.subvol, true, 0, &subvol) ?:
+ bch2_inode_find_by_inum_nowarn_trans(trans, inum, &inode_u) ?:
+ PTR_ERR_OR_ZERO(inode = bch2_new_inode(trans));
+ if (bch2_err_matches(ret, ENOENT)) {
+ struct printbuf buf = PRINTBUF;
+
+ bch2_bkey_val_to_text(&buf, c, k);
+ bch_err(c, "%s points to missing inode", buf.buf);
+ printbuf_exit(&buf);
}
+ if (ret)
+ goto err;
- if (dir_ei->journal_seq > ei->journal_seq)
- ei->journal_seq = dir_ei->journal_seq;
-
- d_instantiate(dentry, inode);
- return 0;
+ bch2_vfs_inode_init(trans, inum, inode, &inode_u, &subvol);
+ inode = bch2_inode_insert(c, inode);
+out:
+ bch2_trans_iter_exit(trans, &dirent_iter);
+ return inode;
+err:
+ inode = ERR_PTR(ret);
+ goto out;
}
-/* methods */
-
-static struct dentry *bch2_lookup(struct inode *dir, struct dentry *dentry,
+static struct dentry *bch2_lookup(struct inode *vdir, struct dentry *dentry,
unsigned int flags)
{
- struct bch_fs *c = dir->i_sb->s_fs_info;
- struct bch_inode_info *dir_ei = to_bch_ei(dir);
- struct inode *inode = NULL;
- u64 inum;
+ struct bch_fs *c = vdir->i_sb->s_fs_info;
+ struct bch_inode_info *dir = to_bch_ei(vdir);
+ struct bch_hash_info hash = bch2_hash_info_init(c, &dir->ei_inode);
+
+ struct bch_inode_info *inode;
+ bch2_trans_do(c, NULL, NULL, 0,
+ PTR_ERR_OR_ZERO(inode = bch2_lookup_trans(trans, inode_inum(dir),
+ &hash, &dentry->d_name)));
+ if (IS_ERR(inode))
+ inode = NULL;
+
+ return d_splice_alias(&inode->v, dentry);
+}
- inum = bch2_dirent_lookup(c, dir->i_ino,
- &dir_ei->str_hash,
- &dentry->d_name);
+static int bch2_mknod(struct mnt_idmap *idmap,
+ struct inode *vdir, struct dentry *dentry,
+ umode_t mode, dev_t rdev)
+{
+ struct bch_inode_info *inode =
+ __bch2_create(idmap, to_bch_ei(vdir), dentry, mode, rdev,
+ (subvol_inum) { 0 }, 0);
- if (inum)
- inode = bch2_vfs_inode_get(dir->i_sb, inum);
+ if (IS_ERR(inode))
+ return bch2_err_class(PTR_ERR(inode));
- return d_splice_alias(inode, dentry);
+ d_instantiate(dentry, &inode->v);
+ return 0;
}
-static int bch2_create(struct inode *dir, struct dentry *dentry,
+static int bch2_create(struct mnt_idmap *idmap,
+ struct inode *vdir, struct dentry *dentry,
umode_t mode, bool excl)
{
- return __bch2_create(dir, dentry, mode|S_IFREG, 0);
+ return bch2_mknod(idmap, vdir, dentry, mode|S_IFREG, 0);
}
-static int bch2_link(struct dentry *old_dentry, struct inode *dir,
- struct dentry *dentry)
+static int __bch2_link(struct bch_fs *c,
+ struct bch_inode_info *inode,
+ struct bch_inode_info *dir,
+ struct dentry *dentry)
{
- struct bch_fs *c = dir->i_sb->s_fs_info;
- struct inode *inode = old_dentry->d_inode;
- struct bch_inode_info *ei = to_bch_ei(inode);
+ struct btree_trans *trans = bch2_trans_get(c);
+ struct bch_inode_unpacked dir_u, inode_u;
int ret;
- lockdep_assert_held(&inode->i_rwsem);
+ mutex_lock(&inode->ei_update_lock);
- inode->i_ctime = current_fs_time(dir->i_sb);
+ ret = commit_do(trans, NULL, NULL, 0,
+ bch2_link_trans(trans,
+ inode_inum(dir), &dir_u,
+ inode_inum(inode), &inode_u,
+ &dentry->d_name));
- ret = bch2_inc_nlink(c, ei);
- if (ret)
- return ret;
+ if (likely(!ret)) {
+ bch2_inode_update_after_write(trans, dir, &dir_u,
+ ATTR_MTIME|ATTR_CTIME);
+ bch2_inode_update_after_write(trans, inode, &inode_u, ATTR_CTIME);
+ }
- ihold(inode);
+ bch2_trans_put(trans);
+ mutex_unlock(&inode->ei_update_lock);
+ return ret;
+}
- ret = bch2_vfs_dirent_create(c, dir, mode_to_type(inode->i_mode),
- &dentry->d_name, inode);
- if (unlikely(ret)) {
- bch2_dec_nlink(c, ei);
- iput(inode);
- return ret;
- }
+static int bch2_link(struct dentry *old_dentry, struct inode *vdir,
+ struct dentry *dentry)
+{
+ struct bch_fs *c = vdir->i_sb->s_fs_info;
+ struct bch_inode_info *dir = to_bch_ei(vdir);
+ struct bch_inode_info *inode = to_bch_ei(old_dentry->d_inode);
+ int ret;
+
+ lockdep_assert_held(&inode->v.i_rwsem);
+
+ ret = bch2_subvol_is_ro(c, dir->ei_subvol) ?:
+ bch2_subvol_is_ro(c, inode->ei_subvol) ?:
+ __bch2_link(c, inode, dir, dentry);
+ if (unlikely(ret))
+ return bch2_err_class(ret);
- d_instantiate(dentry, inode);
+ ihold(&inode->v);
+ d_instantiate(dentry, &inode->v);
return 0;
}
-static int bch2_unlink(struct inode *dir, struct dentry *dentry)
+int __bch2_unlink(struct inode *vdir, struct dentry *dentry,
+ bool deleting_snapshot)
{
- struct bch_fs *c = dir->i_sb->s_fs_info;
- struct bch_inode_info *dir_ei = to_bch_ei(dir);
- struct inode *inode = dentry->d_inode;
- struct bch_inode_info *ei = to_bch_ei(inode);
+ struct bch_fs *c = vdir->i_sb->s_fs_info;
+ struct bch_inode_info *dir = to_bch_ei(vdir);
+ struct bch_inode_info *inode = to_bch_ei(dentry->d_inode);
+ struct bch_inode_unpacked dir_u, inode_u;
+ struct btree_trans *trans = bch2_trans_get(c);
int ret;
- lockdep_assert_held(&inode->i_rwsem);
-
- ret = bch2_dirent_delete(c, dir->i_ino, &dir_ei->str_hash,
- &dentry->d_name, &dir_ei->journal_seq);
- if (ret)
- return ret;
+ bch2_lock_inodes(INODE_UPDATE_LOCK, dir, inode);
- if (dir_ei->journal_seq > ei->journal_seq)
- ei->journal_seq = dir_ei->journal_seq;
+ ret = commit_do(trans, NULL, NULL,
+ BCH_TRANS_COMMIT_no_enospc,
+ bch2_unlink_trans(trans,
+ inode_inum(dir), &dir_u,
+ &inode_u, &dentry->d_name,
+ deleting_snapshot));
+ if (unlikely(ret))
+ goto err;
- inode->i_ctime = dir->i_ctime;
+ bch2_inode_update_after_write(trans, dir, &dir_u,
+ ATTR_MTIME|ATTR_CTIME);
+ bch2_inode_update_after_write(trans, inode, &inode_u,
+ ATTR_MTIME);
- if (S_ISDIR(inode->i_mode)) {
- bch2_dec_nlink(c, dir_ei);
- drop_nlink(inode);
+ if (inode_u.bi_subvol) {
+ /*
+ * Subvolume deletion is asynchronous, but we still want to tell
+ * the VFS that it's been deleted here:
+ */
+ set_nlink(&inode->v, 0);
}
+err:
+ bch2_unlock_inodes(INODE_UPDATE_LOCK, dir, inode);
+ bch2_trans_put(trans);
- bch2_dec_nlink(c, ei);
+ return ret;
+}
- return 0;
+static int bch2_unlink(struct inode *vdir, struct dentry *dentry)
+{
+ struct bch_inode_info *dir= to_bch_ei(vdir);
+ struct bch_fs *c = dir->v.i_sb->s_fs_info;
+
+ int ret = bch2_subvol_is_ro(c, dir->ei_subvol) ?:
+ __bch2_unlink(vdir, dentry, false);
+ return bch2_err_class(ret);
}
-static int bch2_symlink(struct inode *dir, struct dentry *dentry,
+static int bch2_symlink(struct mnt_idmap *idmap,
+ struct inode *vdir, struct dentry *dentry,
const char *symname)
{
- struct bch_fs *c = dir->i_sb->s_fs_info;
- struct inode *inode;
- struct bch_inode_info *ei, *dir_ei = to_bch_ei(dir);
+ struct bch_fs *c = vdir->i_sb->s_fs_info;
+ struct bch_inode_info *dir = to_bch_ei(vdir), *inode;
int ret;
- inode = bch2_vfs_inode_create(c, dir, S_IFLNK|S_IRWXUGO, 0);
- if (unlikely(IS_ERR(inode)))
- return PTR_ERR(inode);
-
- ei = to_bch_ei(inode);
+ inode = __bch2_create(idmap, dir, dentry, S_IFLNK|S_IRWXUGO, 0,
+ (subvol_inum) { 0 }, BCH_CREATE_TMPFILE);
+ if (IS_ERR(inode))
+ return bch2_err_class(PTR_ERR(inode));
- inode_lock(inode);
- ret = page_symlink(inode, symname, strlen(symname) + 1);
- inode_unlock(inode);
+ inode_lock(&inode->v);
+ ret = page_symlink(&inode->v, symname, strlen(symname) + 1);
+ inode_unlock(&inode->v);
if (unlikely(ret))
goto err;
- ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX);
+ ret = filemap_write_and_wait_range(inode->v.i_mapping, 0, LLONG_MAX);
if (unlikely(ret))
goto err;
- /* XXX: racy */
- if (dir_ei->journal_seq < ei->journal_seq)
- dir_ei->journal_seq = ei->journal_seq;
-
- ret = bch2_vfs_dirent_create(c, dir, DT_LNK, &dentry->d_name, inode);
+ ret = __bch2_link(c, inode, dir, dentry);
if (unlikely(ret))
goto err;
- d_instantiate(dentry, inode);
+ d_instantiate(dentry, &inode->v);
return 0;
err:
- clear_nlink(inode);
- iput(inode);
- return ret;
+ iput(&inode->v);
+ return bch2_err_class(ret);
}
-static int bch2_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
+static int bch2_mkdir(struct mnt_idmap *idmap,
+ struct inode *vdir, struct dentry *dentry, umode_t mode)
{
- struct bch_fs *c = dir->i_sb->s_fs_info;
+ return bch2_mknod(idmap, vdir, dentry, mode|S_IFDIR, 0);
+}
+
+static int bch2_rename2(struct mnt_idmap *idmap,
+ struct inode *src_vdir, struct dentry *src_dentry,
+ struct inode *dst_vdir, struct dentry *dst_dentry,
+ unsigned flags)
+{
+ struct bch_fs *c = src_vdir->i_sb->s_fs_info;
+ struct bch_inode_info *src_dir = to_bch_ei(src_vdir);
+ struct bch_inode_info *dst_dir = to_bch_ei(dst_vdir);
+ struct bch_inode_info *src_inode = to_bch_ei(src_dentry->d_inode);
+ struct bch_inode_info *dst_inode = to_bch_ei(dst_dentry->d_inode);
+ struct bch_inode_unpacked dst_dir_u, src_dir_u;
+ struct bch_inode_unpacked src_inode_u, dst_inode_u;
+ struct btree_trans *trans;
+ enum bch_rename_mode mode = flags & RENAME_EXCHANGE
+ ? BCH_RENAME_EXCHANGE
+ : dst_dentry->d_inode
+ ? BCH_RENAME_OVERWRITE : BCH_RENAME;
int ret;
- lockdep_assert_held(&dir->i_rwsem);
+ if (flags & ~(RENAME_NOREPLACE|RENAME_EXCHANGE))
+ return -EINVAL;
+
+ if (mode == BCH_RENAME_OVERWRITE) {
+ ret = filemap_write_and_wait_range(src_inode->v.i_mapping,
+ 0, LLONG_MAX);
+ if (ret)
+ return ret;
+ }
+
+ trans = bch2_trans_get(c);
+
+ bch2_lock_inodes(INODE_UPDATE_LOCK,
+ src_dir,
+ dst_dir,
+ src_inode,
+ dst_inode);
- ret = __bch2_create(dir, dentry, mode|S_IFDIR, 0);
+ ret = bch2_subvol_is_ro_trans(trans, src_dir->ei_subvol) ?:
+ bch2_subvol_is_ro_trans(trans, dst_dir->ei_subvol);
+ if (ret)
+ goto err;
+
+ if (inode_attr_changing(dst_dir, src_inode, Inode_opt_project)) {
+ ret = bch2_fs_quota_transfer(c, src_inode,
+ dst_dir->ei_qid,
+ 1 << QTYP_PRJ,
+ KEY_TYPE_QUOTA_PREALLOC);
+ if (ret)
+ goto err;
+ }
+
+ if (mode == BCH_RENAME_EXCHANGE &&
+ inode_attr_changing(src_dir, dst_inode, Inode_opt_project)) {
+ ret = bch2_fs_quota_transfer(c, dst_inode,
+ src_dir->ei_qid,
+ 1 << QTYP_PRJ,
+ KEY_TYPE_QUOTA_PREALLOC);
+ if (ret)
+ goto err;
+ }
+
+ ret = commit_do(trans, NULL, NULL, 0,
+ bch2_rename_trans(trans,
+ inode_inum(src_dir), &src_dir_u,
+ inode_inum(dst_dir), &dst_dir_u,
+ &src_inode_u,
+ &dst_inode_u,
+ &src_dentry->d_name,
+ &dst_dentry->d_name,
+ mode));
if (unlikely(ret))
- return ret;
+ goto err;
- bch2_inc_nlink(c, to_bch_ei(dir));
+ BUG_ON(src_inode->v.i_ino != src_inode_u.bi_inum);
+ BUG_ON(dst_inode &&
+ dst_inode->v.i_ino != dst_inode_u.bi_inum);
- return 0;
-}
+ bch2_inode_update_after_write(trans, src_dir, &src_dir_u,
+ ATTR_MTIME|ATTR_CTIME);
-static int bch2_rmdir(struct inode *dir, struct dentry *dentry)
-{
- struct bch_fs *c = dir->i_sb->s_fs_info;
- struct inode *inode = dentry->d_inode;
+ if (src_dir != dst_dir)
+ bch2_inode_update_after_write(trans, dst_dir, &dst_dir_u,
+ ATTR_MTIME|ATTR_CTIME);
- if (bch2_empty_dir(c, inode->i_ino))
- return -ENOTEMPTY;
+ bch2_inode_update_after_write(trans, src_inode, &src_inode_u,
+ ATTR_CTIME);
- return bch2_unlink(dir, dentry);
+ if (dst_inode)
+ bch2_inode_update_after_write(trans, dst_inode, &dst_inode_u,
+ ATTR_CTIME);
+err:
+ bch2_trans_put(trans);
+
+ bch2_fs_quota_transfer(c, src_inode,
+ bch_qid(&src_inode->ei_inode),
+ 1 << QTYP_PRJ,
+ KEY_TYPE_QUOTA_NOCHECK);
+ if (dst_inode)
+ bch2_fs_quota_transfer(c, dst_inode,
+ bch_qid(&dst_inode->ei_inode),
+ 1 << QTYP_PRJ,
+ KEY_TYPE_QUOTA_NOCHECK);
+
+ bch2_unlock_inodes(INODE_UPDATE_LOCK,
+ src_dir,
+ dst_dir,
+ src_inode,
+ dst_inode);
+
+ return bch2_err_class(ret);
}
-static int bch2_mknod(struct inode *dir, struct dentry *dentry,
- umode_t mode, dev_t rdev)
+static void bch2_setattr_copy(struct mnt_idmap *idmap,
+ struct bch_inode_info *inode,
+ struct bch_inode_unpacked *bi,
+ struct iattr *attr)
{
- return __bch2_create(dir, dentry, mode, rdev);
+ struct bch_fs *c = inode->v.i_sb->s_fs_info;
+ unsigned int ia_valid = attr->ia_valid;
+
+ if (ia_valid & ATTR_UID)
+ bi->bi_uid = from_kuid(i_user_ns(&inode->v), attr->ia_uid);
+ if (ia_valid & ATTR_GID)
+ bi->bi_gid = from_kgid(i_user_ns(&inode->v), attr->ia_gid);
+
+ if (ia_valid & ATTR_SIZE)
+ bi->bi_size = attr->ia_size;
+
+ if (ia_valid & ATTR_ATIME)
+ bi->bi_atime = timespec_to_bch2_time(c, attr->ia_atime);
+ if (ia_valid & ATTR_MTIME)
+ bi->bi_mtime = timespec_to_bch2_time(c, attr->ia_mtime);
+ if (ia_valid & ATTR_CTIME)
+ bi->bi_ctime = timespec_to_bch2_time(c, attr->ia_ctime);
+
+ if (ia_valid & ATTR_MODE) {
+ umode_t mode = attr->ia_mode;
+ kgid_t gid = ia_valid & ATTR_GID
+ ? attr->ia_gid
+ : inode->v.i_gid;
+
+ if (!in_group_p(gid) &&
+ !capable_wrt_inode_uidgid(idmap, &inode->v, CAP_FSETID))
+ mode &= ~S_ISGID;
+ bi->bi_mode = mode;
+ }
}
-static int bch2_rename(struct inode *old_dir, struct dentry *old_dentry,
- struct inode *new_dir, struct dentry *new_dentry)
+int bch2_setattr_nonsize(struct mnt_idmap *idmap,
+ struct bch_inode_info *inode,
+ struct iattr *attr)
{
- struct bch_fs *c = old_dir->i_sb->s_fs_info;
- struct inode *old_inode = old_dentry->d_inode;
- struct bch_inode_info *ei = to_bch_ei(old_inode);
- struct inode *new_inode = new_dentry->d_inode;
- struct timespec now = current_fs_time(old_dir->i_sb);
+ struct bch_fs *c = inode->v.i_sb->s_fs_info;
+ struct bch_qid qid;
+ struct btree_trans *trans;
+ struct btree_iter inode_iter = { NULL };
+ struct bch_inode_unpacked inode_u;
+ struct posix_acl *acl = NULL;
int ret;
- lockdep_assert_held(&old_dir->i_rwsem);
- lockdep_assert_held(&new_dir->i_rwsem);
+ mutex_lock(&inode->ei_update_lock);
- if (new_inode)
- filemap_write_and_wait_range(old_inode->i_mapping,
- 0, LLONG_MAX);
+ qid = inode->ei_qid;
- if (new_inode && S_ISDIR(old_inode->i_mode)) {
- lockdep_assert_held(&new_inode->i_rwsem);
+ if (attr->ia_valid & ATTR_UID)
+ qid.q[QTYP_USR] = from_kuid(i_user_ns(&inode->v), attr->ia_uid);
- if (!S_ISDIR(new_inode->i_mode))
- return -ENOTDIR;
+ if (attr->ia_valid & ATTR_GID)
+ qid.q[QTYP_GRP] = from_kgid(i_user_ns(&inode->v), attr->ia_gid);
- if (bch2_empty_dir(c, new_inode->i_ino))
- return -ENOTEMPTY;
+ ret = bch2_fs_quota_transfer(c, inode, qid, ~0,
+ KEY_TYPE_QUOTA_PREALLOC);
+ if (ret)
+ goto err;
- ret = bch2_dirent_rename(c,
- old_dir, &old_dentry->d_name,
- new_dir, &new_dentry->d_name,
- &ei->journal_seq, BCH_RENAME_OVERWRITE);
- if (unlikely(ret))
- return ret;
+ trans = bch2_trans_get(c);
+retry:
+ bch2_trans_begin(trans);
+ kfree(acl);
+ acl = NULL;
- clear_nlink(new_inode);
- bch2_dec_nlink(c, to_bch_ei(old_dir));
- } else if (new_inode) {
- lockdep_assert_held(&new_inode->i_rwsem);
+ ret = bch2_inode_peek(trans, &inode_iter, &inode_u, inode_inum(inode),
+ BTREE_ITER_INTENT);
+ if (ret)
+ goto btree_err;
- ret = bch2_dirent_rename(c,
- old_dir, &old_dentry->d_name,
- new_dir, &new_dentry->d_name,
- &ei->journal_seq, BCH_RENAME_OVERWRITE);
- if (unlikely(ret))
- return ret;
+ bch2_setattr_copy(idmap, inode, &inode_u, attr);
- new_inode->i_ctime = now;
- bch2_dec_nlink(c, to_bch_ei(new_inode));
- } else if (S_ISDIR(old_inode->i_mode)) {
- ret = bch2_dirent_rename(c,
- old_dir, &old_dentry->d_name,
- new_dir, &new_dentry->d_name,
- &ei->journal_seq, BCH_RENAME);
- if (unlikely(ret))
- return ret;
-
- bch2_inc_nlink(c, to_bch_ei(new_dir));
- bch2_dec_nlink(c, to_bch_ei(old_dir));
- } else {
- ret = bch2_dirent_rename(c,
- old_dir, &old_dentry->d_name,
- new_dir, &new_dentry->d_name,
- &ei->journal_seq, BCH_RENAME);
- if (unlikely(ret))
- return ret;
+ if (attr->ia_valid & ATTR_MODE) {
+ ret = bch2_acl_chmod(trans, inode_inum(inode), &inode_u,
+ inode_u.bi_mode, &acl);
+ if (ret)
+ goto btree_err;
}
- old_dir->i_ctime = old_dir->i_mtime = now;
- new_dir->i_ctime = new_dir->i_mtime = now;
- mark_inode_dirty_sync(old_dir);
- mark_inode_dirty_sync(new_dir);
-
- old_inode->i_ctime = now;
- mark_inode_dirty_sync(old_inode);
-
- return 0;
-}
-
-static int bch2_rename_exchange(struct inode *old_dir, struct dentry *old_dentry,
- struct inode *new_dir, struct dentry *new_dentry)
-{
- struct bch_fs *c = old_dir->i_sb->s_fs_info;
- struct inode *old_inode = old_dentry->d_inode;
- struct inode *new_inode = new_dentry->d_inode;
- struct bch_inode_info *ei = to_bch_ei(old_inode);
- struct timespec now = current_fs_time(old_dir->i_sb);
- int ret;
+ ret = bch2_inode_write(trans, &inode_iter, &inode_u) ?:
+ bch2_trans_commit(trans, NULL, NULL,
+ BCH_TRANS_COMMIT_no_enospc);
+btree_err:
+ bch2_trans_iter_exit(trans, &inode_iter);
- ret = bch2_dirent_rename(c,
- old_dir, &old_dentry->d_name,
- new_dir, &new_dentry->d_name,
- &ei->journal_seq, BCH_RENAME_EXCHANGE);
+ if (bch2_err_matches(ret, BCH_ERR_transaction_restart))
+ goto retry;
if (unlikely(ret))
- return ret;
+ goto err_trans;
- if (S_ISDIR(old_inode->i_mode) !=
- S_ISDIR(new_inode->i_mode)) {
- if (S_ISDIR(old_inode->i_mode)) {
- bch2_inc_nlink(c, to_bch_ei(new_dir));
- bch2_dec_nlink(c, to_bch_ei(old_dir));
- } else {
- bch2_dec_nlink(c, to_bch_ei(new_dir));
- bch2_inc_nlink(c, to_bch_ei(old_dir));
- }
- }
-
- old_dir->i_ctime = old_dir->i_mtime = now;
- new_dir->i_ctime = new_dir->i_mtime = now;
- mark_inode_dirty_sync(old_dir);
- mark_inode_dirty_sync(new_dir);
+ bch2_inode_update_after_write(trans, inode, &inode_u, attr->ia_valid);
- old_inode->i_ctime = now;
- new_inode->i_ctime = now;
- mark_inode_dirty_sync(old_inode);
- mark_inode_dirty_sync(new_inode);
+ if (acl)
+ set_cached_acl(&inode->v, ACL_TYPE_ACCESS, acl);
+err_trans:
+ bch2_trans_put(trans);
+err:
+ mutex_unlock(&inode->ei_update_lock);
- return 0;
+ return bch2_err_class(ret);
}
-static int bch2_rename2(struct inode *old_dir, struct dentry *old_dentry,
- struct inode *new_dir, struct dentry *new_dentry,
- unsigned flags)
+static int bch2_getattr(struct mnt_idmap *idmap,
+ const struct path *path, struct kstat *stat,
+ u32 request_mask, unsigned query_flags)
{
- if (flags & ~(RENAME_NOREPLACE|RENAME_EXCHANGE))
- return -EINVAL;
+ struct bch_inode_info *inode = to_bch_ei(d_inode(path->dentry));
+ struct bch_fs *c = inode->v.i_sb->s_fs_info;
+
+ stat->dev = inode->v.i_sb->s_dev;
+ stat->ino = inode->v.i_ino;
+ stat->mode = inode->v.i_mode;
+ stat->nlink = inode->v.i_nlink;
+ stat->uid = inode->v.i_uid;
+ stat->gid = inode->v.i_gid;
+ stat->rdev = inode->v.i_rdev;
+ stat->size = i_size_read(&inode->v);
+ stat->atime = inode_get_atime(&inode->v);
+ stat->mtime = inode_get_mtime(&inode->v);
+ stat->ctime = inode_get_ctime(&inode->v);
+ stat->blksize = block_bytes(c);
+ stat->blocks = inode->v.i_blocks;
+
+ if (request_mask & STATX_BTIME) {
+ stat->result_mask |= STATX_BTIME;
+ stat->btime = bch2_time_to_timespec(c, inode->ei_inode.bi_otime);
+ }
- if (flags & RENAME_EXCHANGE)
- return bch2_rename_exchange(old_dir, old_dentry,
- new_dir, new_dentry);
+ if (inode->ei_inode.bi_flags & BCH_INODE_immutable)
+ stat->attributes |= STATX_ATTR_IMMUTABLE;
+ stat->attributes_mask |= STATX_ATTR_IMMUTABLE;
- return bch2_rename(old_dir, old_dentry, new_dir, new_dentry);
+ if (inode->ei_inode.bi_flags & BCH_INODE_append)
+ stat->attributes |= STATX_ATTR_APPEND;
+ stat->attributes_mask |= STATX_ATTR_APPEND;
+
+ if (inode->ei_inode.bi_flags & BCH_INODE_nodump)
+ stat->attributes |= STATX_ATTR_NODUMP;
+ stat->attributes_mask |= STATX_ATTR_NODUMP;
+
+ return 0;
}
-static int bch2_setattr(struct dentry *dentry, struct iattr *iattr)
+static int bch2_setattr(struct mnt_idmap *idmap,
+ struct dentry *dentry, struct iattr *iattr)
{
- struct inode *inode = dentry->d_inode;
- struct bch_inode_info *ei = to_bch_ei(inode);
- struct bch_fs *c = inode->i_sb->s_fs_info;
- int ret = 0;
-
- lockdep_assert_held(&inode->i_rwsem);
+ struct bch_inode_info *inode = to_bch_ei(dentry->d_inode);
+ struct bch_fs *c = inode->v.i_sb->s_fs_info;
+ int ret;
- pr_debug("i_size was %llu update has %llu",
- inode->i_size, iattr->ia_size);
+ lockdep_assert_held(&inode->v.i_rwsem);
- ret = setattr_prepare(dentry, iattr);
+ ret = bch2_subvol_is_ro(c, inode->ei_subvol) ?:
+ setattr_prepare(idmap, dentry, iattr);
if (ret)
return ret;
- if (iattr->ia_valid & ATTR_SIZE) {
- ret = bch2_truncate(inode, iattr);
- } else {
- mutex_lock(&ei->update_lock);
- setattr_copy(inode, iattr);
- ret = bch2_write_inode(c, ei);
- mutex_unlock(&ei->update_lock);
- }
-
- if (unlikely(ret))
- return ret;
-
- if (iattr->ia_valid & ATTR_MODE)
- ret = posix_acl_chmod(inode, inode->i_mode);
-
- return ret;
+ return iattr->ia_valid & ATTR_SIZE
+ ? bchfs_truncate(idmap, inode, iattr)
+ : bch2_setattr_nonsize(idmap, inode, iattr);
}
-static int bch2_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
+static int bch2_tmpfile(struct mnt_idmap *idmap,
+ struct inode *vdir, struct file *file, umode_t mode)
{
- struct bch_fs *c = dir->i_sb->s_fs_info;
- struct inode *inode;
+ struct bch_inode_info *inode =
+ __bch2_create(idmap, to_bch_ei(vdir),
+ file->f_path.dentry, mode, 0,
+ (subvol_inum) { 0 }, BCH_CREATE_TMPFILE);
- /* XXX: i_nlink should be 0? */
- inode = bch2_vfs_inode_create(c, dir, mode, 0);
- if (unlikely(IS_ERR(inode)))
- return PTR_ERR(inode);
+ if (IS_ERR(inode))
+ return bch2_err_class(PTR_ERR(inode));
- d_tmpfile(dentry, inode);
- return 0;
+ d_mark_tmpfile(file, &inode->v);
+ d_instantiate(file->f_path.dentry, &inode->v);
+ return finish_open_simple(file, 0);
}
-static int bch2_fill_extent(struct fiemap_extent_info *info,
- const struct bkey_i *k, unsigned flags)
+static int bch2_fill_extent(struct bch_fs *c,
+ struct fiemap_extent_info *info,
+ struct bkey_s_c k, unsigned flags)
{
- if (bkey_extent_is_data(&k->k)) {
- struct bkey_s_c_extent e = bkey_i_to_s_c_extent(k);
- const struct bch_extent_ptr *ptr;
- const union bch_extent_crc *crc;
+ if (bkey_extent_is_direct_data(k.k)) {
+ struct bkey_ptrs_c ptrs = bch2_bkey_ptrs_c(k);
+ const union bch_extent_entry *entry;
+ struct extent_ptr_decoded p;
int ret;
- extent_for_each_ptr_crc(e, ptr, crc) {
+ if (k.k->type == KEY_TYPE_reflink_v)
+ flags |= FIEMAP_EXTENT_SHARED;
+
+ bkey_for_each_ptr_decode(k.k, ptrs, p, entry) {
int flags2 = 0;
- u64 offset = ptr->offset;
+ u64 offset = p.ptr.offset;
- if (crc_compression_type(crc))
+ if (p.ptr.unwritten)
+ flags2 |= FIEMAP_EXTENT_UNWRITTEN;
+
+ if (p.crc.compression_type)
flags2 |= FIEMAP_EXTENT_ENCODED;
else
- offset += crc_offset(crc);
+ offset += p.crc.offset;
- if ((offset & (PAGE_SECTORS - 1)) ||
- (e.k->size & (PAGE_SECTORS - 1)))
+ if ((offset & (block_sectors(c) - 1)) ||
+ (k.k->size & (block_sectors(c) - 1)))
flags2 |= FIEMAP_EXTENT_NOT_ALIGNED;
ret = fiemap_fill_next_extent(info,
- bkey_start_offset(e.k) << 9,
- offset << 9,
- e.k->size << 9, flags|flags2);
+ bkey_start_offset(k.k) << 9,
+ offset << 9,
+ k.k->size << 9, flags|flags2);
if (ret)
return ret;
}
return 0;
- } else if (k->k.type == BCH_RESERVATION) {
+ } else if (bkey_extent_is_inline_data(k.k)) {
+ return fiemap_fill_next_extent(info,
+ bkey_start_offset(k.k) << 9,
+ 0, k.k->size << 9,
+ flags|
+ FIEMAP_EXTENT_DATA_INLINE);
+ } else if (k.k->type == KEY_TYPE_reservation) {
return fiemap_fill_next_extent(info,
- bkey_start_offset(&k->k) << 9,
- 0, k->k.size << 9,
+ bkey_start_offset(k.k) << 9,
+ 0, k.k->size << 9,
flags|
FIEMAP_EXTENT_DELALLOC|
FIEMAP_EXTENT_UNWRITTEN);
}
}
-static int bch2_fiemap(struct inode *inode, struct fiemap_extent_info *info,
+static int bch2_fiemap(struct inode *vinode, struct fiemap_extent_info *info,
u64 start, u64 len)
{
- struct bch_fs *c = inode->i_sb->s_fs_info;
+ struct bch_fs *c = vinode->i_sb->s_fs_info;
+ struct bch_inode_info *ei = to_bch_ei(vinode);
+ struct btree_trans *trans;
struct btree_iter iter;
struct bkey_s_c k;
- BKEY_PADDED(k) tmp;
+ struct bkey_buf cur, prev;
+ struct bpos end = POS(ei->v.i_ino, (start + len) >> 9);
+ unsigned offset_into_extent, sectors;
bool have_extent = false;
+ u32 snapshot;
int ret = 0;
+ ret = fiemap_prep(&ei->v, info, start, &len, FIEMAP_FLAG_SYNC);
+ if (ret)
+ return ret;
+
if (start + len < start)
return -EINVAL;
- for_each_btree_key(&iter, c, BTREE_ID_EXTENTS,
- POS(inode->i_ino, start >> 9), 0, k)
- if (bkey_extent_is_data(k.k) ||
- k.k->type == BCH_RESERVATION) {
- if (bkey_cmp(bkey_start_pos(k.k),
- POS(inode->i_ino, (start + len) >> 9)) >= 0)
- break;
+ start >>= 9;
- if (have_extent) {
- ret = bch2_fill_extent(info, &tmp.k, 0);
- if (ret)
- goto out;
- }
+ bch2_bkey_buf_init(&cur);
+ bch2_bkey_buf_init(&prev);
+ trans = bch2_trans_get(c);
+retry:
+ bch2_trans_begin(trans);
+
+ ret = bch2_subvolume_get_snapshot(trans, ei->ei_subvol, &snapshot);
+ if (ret)
+ goto err;
+
+ bch2_trans_iter_init(trans, &iter, BTREE_ID_extents,
+ SPOS(ei->v.i_ino, start, snapshot), 0);
+
+ while (!(ret = btree_trans_too_many_iters(trans)) &&
+ (k = bch2_btree_iter_peek_upto(&iter, end)).k &&
+ !(ret = bkey_err(k))) {
+ enum btree_id data_btree = BTREE_ID_extents;
- bkey_reassemble(&tmp.k, k);
- have_extent = true;
+ if (!bkey_extent_is_data(k.k) &&
+ k.k->type != KEY_TYPE_reservation) {
+ bch2_btree_iter_advance(&iter);
+ continue;
}
- if (have_extent)
- ret = bch2_fill_extent(info, &tmp.k, FIEMAP_EXTENT_LAST);
-out:
- bch2_btree_iter_unlock(&iter);
+ offset_into_extent = iter.pos.offset -
+ bkey_start_offset(k.k);
+ sectors = k.k->size - offset_into_extent;
+
+ bch2_bkey_buf_reassemble(&cur, c, k);
+
+ ret = bch2_read_indirect_extent(trans, &data_btree,
+ &offset_into_extent, &cur);
+ if (ret)
+ break;
+
+ k = bkey_i_to_s_c(cur.k);
+ bch2_bkey_buf_realloc(&prev, c, k.k->u64s);
+
+ sectors = min(sectors, k.k->size - offset_into_extent);
+
+ bch2_cut_front(POS(k.k->p.inode,
+ bkey_start_offset(k.k) +
+ offset_into_extent),
+ cur.k);
+ bch2_key_resize(&cur.k->k, sectors);
+ cur.k->k.p = iter.pos;
+ cur.k->k.p.offset += cur.k->k.size;
+
+ if (have_extent) {
+ bch2_trans_unlock(trans);
+ ret = bch2_fill_extent(c, info,
+ bkey_i_to_s_c(prev.k), 0);
+ if (ret)
+ break;
+ }
+
+ bkey_copy(prev.k, cur.k);
+ have_extent = true;
+
+ bch2_btree_iter_set_pos(&iter,
+ POS(iter.pos.inode, iter.pos.offset + sectors));
+ }
+ start = iter.pos.offset;
+ bch2_trans_iter_exit(trans, &iter);
+err:
+ if (bch2_err_matches(ret, BCH_ERR_transaction_restart))
+ goto retry;
+
+ if (!ret && have_extent) {
+ bch2_trans_unlock(trans);
+ ret = bch2_fill_extent(c, info, bkey_i_to_s_c(prev.k),
+ FIEMAP_EXTENT_LAST);
+ }
+
+ bch2_trans_put(trans);
+ bch2_bkey_buf_exit(&cur, c);
+ bch2_bkey_buf_exit(&prev, c);
return ret < 0 ? ret : 0;
}
static const struct vm_operations_struct bch_vm_ops = {
- .fault = filemap_fault,
+ .fault = bch2_page_fault,
.map_pages = filemap_map_pages,
.page_mkwrite = bch2_page_mkwrite,
};
return 0;
}
-/* Inode flags: */
-
-static const unsigned bch_inode_flags_to_vfs_flags_map[] = {
- [__BCH_INODE_SYNC] = S_SYNC,
- [__BCH_INODE_IMMUTABLE] = S_IMMUTABLE,
- [__BCH_INODE_APPEND] = S_APPEND,
- [__BCH_INODE_NOATIME] = S_NOATIME,
-};
+/* Directories: */
-static const unsigned bch_inode_flags_to_user_flags_map[] = {
- [__BCH_INODE_SYNC] = FS_SYNC_FL,
- [__BCH_INODE_IMMUTABLE] = FS_IMMUTABLE_FL,
- [__BCH_INODE_APPEND] = FS_APPEND_FL,
- [__BCH_INODE_NODUMP] = FS_NODUMP_FL,
- [__BCH_INODE_NOATIME] = FS_NOATIME_FL,
-};
+static loff_t bch2_dir_llseek(struct file *file, loff_t offset, int whence)
+{
+ return generic_file_llseek_size(file, offset, whence,
+ S64_MAX, S64_MAX);
+}
-/* Set VFS inode flags from bcachefs inode: */
-static void bch2_inode_flags_to_vfs(struct inode *inode)
+static int bch2_vfs_readdir(struct file *file, struct dir_context *ctx)
{
- unsigned i, flags = to_bch_ei(inode)->i_flags;
+ struct bch_inode_info *inode = file_bch_inode(file);
+ struct bch_fs *c = inode->v.i_sb->s_fs_info;
- for (i = 0; i < ARRAY_SIZE(bch_inode_flags_to_vfs_flags_map); i++)
- if (flags & (1 << i))
- inode->i_flags |= bch_inode_flags_to_vfs_flags_map[i];
- else
- inode->i_flags &= ~bch_inode_flags_to_vfs_flags_map[i];
+ if (!dir_emit_dots(file, ctx))
+ return 0;
+
+ int ret = bch2_readdir(c, inode_inum(inode), ctx);
+
+ bch_err_fn(c, ret);
+ return bch2_err_class(ret);
}
-/* Get FS_IOC_GETFLAGS flags from bcachefs inode: */
-static unsigned bch2_inode_flags_to_user_flags(unsigned flags)
+static int bch2_open(struct inode *vinode, struct file *file)
{
- unsigned i, ret = 0;
+ if (file->f_flags & (O_WRONLY|O_RDWR)) {
+ struct bch_inode_info *inode = to_bch_ei(vinode);
+ struct bch_fs *c = inode->v.i_sb->s_fs_info;
- for (i = 0; i < ARRAY_SIZE(bch_inode_flags_to_user_flags_map); i++)
- if (flags & (1 << i))
- ret |= bch_inode_flags_to_user_flags_map[i];
+ int ret = bch2_subvol_is_ro(c, inode->ei_subvol);
+ if (ret)
+ return ret;
+ }
- return ret;
+ return generic_file_open(vinode, file);
}
-static int bch2_inode_user_flags_set(struct bch_inode_info *ei,
- struct bch_inode_unpacked *bi,
- void *p)
-{
- /*
- * We're relying on btree locking here for exclusion with other ioctl
- * calls - use the flags in the btree (@bi), not ei->i_flags:
- */
- unsigned bch_flags = bi->i_flags;
- unsigned oldflags = bch2_inode_flags_to_user_flags(bch_flags);
- unsigned newflags = *((unsigned *) p);
- unsigned i;
+static const struct file_operations bch_file_operations = {
+ .open = bch2_open,
+ .llseek = bch2_llseek,
+ .read_iter = bch2_read_iter,
+ .write_iter = bch2_write_iter,
+ .mmap = bch2_mmap,
+ .fsync = bch2_fsync,
+ .splice_read = filemap_splice_read,
+ .splice_write = iter_file_splice_write,
+ .fallocate = bch2_fallocate_dispatch,
+ .unlocked_ioctl = bch2_fs_file_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = bch2_compat_fs_ioctl,
+#endif
+ .remap_file_range = bch2_remap_file_range,
+};
- if (((newflags ^ oldflags) & (FS_APPEND_FL|FS_IMMUTABLE_FL)) &&
- !capable(CAP_LINUX_IMMUTABLE))
- return -EPERM;
+static const struct inode_operations bch_file_inode_operations = {
+ .getattr = bch2_getattr,
+ .setattr = bch2_setattr,
+ .fiemap = bch2_fiemap,
+ .listxattr = bch2_xattr_list,
+#ifdef CONFIG_BCACHEFS_POSIX_ACL
+ .get_acl = bch2_get_acl,
+ .set_acl = bch2_set_acl,
+#endif
+};
- for (i = 0; i < ARRAY_SIZE(bch_inode_flags_to_user_flags_map); i++) {
- if (newflags & bch_inode_flags_to_user_flags_map[i])
- bch_flags |= (1 << i);
- else
- bch_flags &= ~(1 << i);
+static const struct inode_operations bch_dir_inode_operations = {
+ .lookup = bch2_lookup,
+ .create = bch2_create,
+ .link = bch2_link,
+ .unlink = bch2_unlink,
+ .symlink = bch2_symlink,
+ .mkdir = bch2_mkdir,
+ .rmdir = bch2_unlink,
+ .mknod = bch2_mknod,
+ .rename = bch2_rename2,
+ .getattr = bch2_getattr,
+ .setattr = bch2_setattr,
+ .tmpfile = bch2_tmpfile,
+ .listxattr = bch2_xattr_list,
+#ifdef CONFIG_BCACHEFS_POSIX_ACL
+ .get_acl = bch2_get_acl,
+ .set_acl = bch2_set_acl,
+#endif
+};
- newflags &= ~bch_inode_flags_to_user_flags_map[i];
- oldflags &= ~bch_inode_flags_to_user_flags_map[i];
- }
+static const struct file_operations bch_dir_file_operations = {
+ .llseek = bch2_dir_llseek,
+ .read = generic_read_dir,
+ .iterate_shared = bch2_vfs_readdir,
+ .fsync = bch2_fsync,
+ .unlocked_ioctl = bch2_fs_file_ioctl,
+#ifdef CONFIG_COMPAT
+ .compat_ioctl = bch2_compat_fs_ioctl,
+#endif
+};
+
+static const struct inode_operations bch_symlink_inode_operations = {
+ .get_link = page_get_link,
+ .getattr = bch2_getattr,
+ .setattr = bch2_setattr,
+ .listxattr = bch2_xattr_list,
+#ifdef CONFIG_BCACHEFS_POSIX_ACL
+ .get_acl = bch2_get_acl,
+ .set_acl = bch2_set_acl,
+#endif
+};
- if (oldflags != newflags)
- return -EOPNOTSUPP;
+static const struct inode_operations bch_special_inode_operations = {
+ .getattr = bch2_getattr,
+ .setattr = bch2_setattr,
+ .listxattr = bch2_xattr_list,
+#ifdef CONFIG_BCACHEFS_POSIX_ACL
+ .get_acl = bch2_get_acl,
+ .set_acl = bch2_set_acl,
+#endif
+};
- bi->i_flags = bch_flags;
- ei->vfs_inode.i_ctime = current_fs_time(ei->vfs_inode.i_sb);
+static const struct address_space_operations bch_address_space_operations = {
+ .read_folio = bch2_read_folio,
+ .writepages = bch2_writepages,
+ .readahead = bch2_readahead,
+ .dirty_folio = filemap_dirty_folio,
+ .write_begin = bch2_write_begin,
+ .write_end = bch2_write_end,
+ .invalidate_folio = bch2_invalidate_folio,
+ .release_folio = bch2_release_folio,
+ .direct_IO = noop_direct_IO,
+#ifdef CONFIG_MIGRATION
+ .migrate_folio = filemap_migrate_folio,
+#endif
+ .error_remove_folio = generic_error_remove_folio,
+};
- return 0;
-}
+struct bcachefs_fid {
+ u64 inum;
+ u32 subvol;
+ u32 gen;
+} __packed;
-#define FS_IOC_GOINGDOWN _IOR ('X', 125, __u32)
+struct bcachefs_fid_with_parent {
+ struct bcachefs_fid fid;
+ struct bcachefs_fid dir;
+} __packed;
-static long bch2_fs_file_ioctl(struct file *filp, unsigned int cmd,
- unsigned long arg)
+static int bcachefs_fid_valid(int fh_len, int fh_type)
{
- struct inode *inode = file_inode(filp);
- struct super_block *sb = inode->i_sb;
- struct bch_fs *c = sb->s_fs_info;
- struct bch_inode_info *ei = to_bch_ei(inode);
- unsigned flags;
- int ret;
-
- switch (cmd) {
- case FS_IOC_GETFLAGS:
- return put_user(bch2_inode_flags_to_user_flags(ei->i_flags),
- (int __user *) arg);
+ switch (fh_type) {
+ case FILEID_BCACHEFS_WITHOUT_PARENT:
+ return fh_len == sizeof(struct bcachefs_fid) / sizeof(u32);
+ case FILEID_BCACHEFS_WITH_PARENT:
+ return fh_len == sizeof(struct bcachefs_fid_with_parent) / sizeof(u32);
+ default:
+ return false;
+ }
+}
- case FS_IOC_SETFLAGS: {
- ret = mnt_want_write_file(filp);
- if (ret)
- return ret;
+static struct bcachefs_fid bch2_inode_to_fid(struct bch_inode_info *inode)
+{
+ return (struct bcachefs_fid) {
+ .inum = inode->ei_inode.bi_inum,
+ .subvol = inode->ei_subvol,
+ .gen = inode->ei_inode.bi_generation,
+ };
+}
- if (!inode_owner_or_capable(inode)) {
- ret = -EACCES;
- goto setflags_out;
- }
+static int bch2_encode_fh(struct inode *vinode, u32 *fh, int *len,
+ struct inode *vdir)
+{
+ struct bch_inode_info *inode = to_bch_ei(vinode);
+ struct bch_inode_info *dir = to_bch_ei(vdir);
+ int min_len;
- if (get_user(flags, (int __user *) arg)) {
- ret = -EFAULT;
- goto setflags_out;
- }
+ if (!S_ISDIR(inode->v.i_mode) && dir) {
+ struct bcachefs_fid_with_parent *fid = (void *) fh;
- if (!S_ISREG(inode->i_mode) &&
- !S_ISDIR(inode->i_mode) &&
- (flags & (FS_NODUMP_FL|FS_NOATIME_FL)) != flags) {
- ret = -EINVAL;
- goto setflags_out;
+ min_len = sizeof(*fid) / sizeof(u32);
+ if (*len < min_len) {
+ *len = min_len;
+ return FILEID_INVALID;
}
- inode_lock(inode);
+ fid->fid = bch2_inode_to_fid(inode);
+ fid->dir = bch2_inode_to_fid(dir);
- mutex_lock(&ei->update_lock);
- ret = __bch2_write_inode(c, ei, bch2_inode_user_flags_set, &flags);
- mutex_unlock(&ei->update_lock);
+ *len = min_len;
+ return FILEID_BCACHEFS_WITH_PARENT;
+ } else {
+ struct bcachefs_fid *fid = (void *) fh;
- if (!ret)
- bch2_inode_flags_to_vfs(inode);
+ min_len = sizeof(*fid) / sizeof(u32);
+ if (*len < min_len) {
+ *len = min_len;
+ return FILEID_INVALID;
+ }
+ *fid = bch2_inode_to_fid(inode);
- inode_unlock(inode);
-setflags_out:
- mnt_drop_write_file(filp);
- return ret;
+ *len = min_len;
+ return FILEID_BCACHEFS_WITHOUT_PARENT;
}
+}
- case FS_IOC_GETVERSION:
- return -ENOTTY;
- case FS_IOC_SETVERSION:
- return -ENOTTY;
+static struct inode *bch2_nfs_get_inode(struct super_block *sb,
+ struct bcachefs_fid fid)
+{
+ struct bch_fs *c = sb->s_fs_info;
+ struct inode *vinode = bch2_vfs_inode_get(c, (subvol_inum) {
+ .subvol = fid.subvol,
+ .inum = fid.inum,
+ });
+ if (!IS_ERR(vinode) && vinode->i_generation != fid.gen) {
+ iput(vinode);
+ vinode = ERR_PTR(-ESTALE);
+ }
+ return vinode;
+}
- case FS_IOC_GOINGDOWN:
- if (!capable(CAP_SYS_ADMIN))
- return -EPERM;
+static struct dentry *bch2_fh_to_dentry(struct super_block *sb, struct fid *_fid,
+ int fh_len, int fh_type)
+{
+ struct bcachefs_fid *fid = (void *) _fid;
- down_write(&sb->s_umount);
- sb->s_flags |= MS_RDONLY;
- bch2_fs_emergency_read_only(c);
- up_write(&sb->s_umount);
- return 0;
+ if (!bcachefs_fid_valid(fh_len, fh_type))
+ return NULL;
- default:
- return bch2_fs_ioctl(c, cmd, (void __user *) arg);
- }
+ return d_obtain_alias(bch2_nfs_get_inode(sb, *fid));
}
-#ifdef CONFIG_COMPAT
-static long bch2_compat_fs_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+static struct dentry *bch2_fh_to_parent(struct super_block *sb, struct fid *_fid,
+ int fh_len, int fh_type)
{
- /* These are just misnamed, they actually get/put from/to user an int */
- switch (cmd) {
- case FS_IOC_GETFLAGS:
- cmd = FS_IOC_GETFLAGS;
- break;
- case FS_IOC32_SETFLAGS:
- cmd = FS_IOC_SETFLAGS;
- break;
- default:
- return -ENOIOCTLCMD;
- }
- return bch2_fs_file_ioctl(file, cmd, (unsigned long) compat_ptr(arg));
-}
-#endif
+ struct bcachefs_fid_with_parent *fid = (void *) _fid;
-/* Directories: */
+ if (!bcachefs_fid_valid(fh_len, fh_type) ||
+ fh_type != FILEID_BCACHEFS_WITH_PARENT)
+ return NULL;
-static loff_t bch2_dir_llseek(struct file *file, loff_t offset, int whence)
+ return d_obtain_alias(bch2_nfs_get_inode(sb, fid->dir));
+}
+
+static struct dentry *bch2_get_parent(struct dentry *child)
{
- return generic_file_llseek_size(file, offset, whence,
- S64_MAX, S64_MAX);
+ struct bch_inode_info *inode = to_bch_ei(child->d_inode);
+ struct bch_fs *c = inode->v.i_sb->s_fs_info;
+ subvol_inum parent_inum = {
+ .subvol = inode->ei_inode.bi_parent_subvol ?:
+ inode->ei_subvol,
+ .inum = inode->ei_inode.bi_dir,
+ };
+
+ return d_obtain_alias(bch2_vfs_inode_get(c, parent_inum));
}
-static int bch2_vfs_readdir(struct file *file, struct dir_context *ctx)
-{
- struct inode *inode = file_inode(file);
- struct bch_fs *c = inode->i_sb->s_fs_info;
+static int bch2_get_name(struct dentry *parent, char *name, struct dentry *child)
+{
+ struct bch_inode_info *inode = to_bch_ei(child->d_inode);
+ struct bch_inode_info *dir = to_bch_ei(parent->d_inode);
+ struct bch_fs *c = inode->v.i_sb->s_fs_info;
+ struct btree_trans *trans;
+ struct btree_iter iter1;
+ struct btree_iter iter2;
+ struct bkey_s_c k;
+ struct bkey_s_c_dirent d;
+ struct bch_inode_unpacked inode_u;
+ subvol_inum target;
+ u32 snapshot;
+ struct qstr dirent_name;
+ unsigned name_len = 0;
+ int ret;
+
+ if (!S_ISDIR(dir->v.i_mode))
+ return -EINVAL;
+
+ trans = bch2_trans_get(c);
+
+ bch2_trans_iter_init(trans, &iter1, BTREE_ID_dirents,
+ POS(dir->ei_inode.bi_inum, 0), 0);
+ bch2_trans_iter_init(trans, &iter2, BTREE_ID_dirents,
+ POS(dir->ei_inode.bi_inum, 0), 0);
+retry:
+ bch2_trans_begin(trans);
+
+ ret = bch2_subvolume_get_snapshot(trans, dir->ei_subvol, &snapshot);
+ if (ret)
+ goto err;
+
+ bch2_btree_iter_set_snapshot(&iter1, snapshot);
+ bch2_btree_iter_set_snapshot(&iter2, snapshot);
+
+ ret = bch2_inode_find_by_inum_trans(trans, inode_inum(inode), &inode_u);
+ if (ret)
+ goto err;
+
+ if (inode_u.bi_dir == dir->ei_inode.bi_inum) {
+ bch2_btree_iter_set_pos(&iter1, POS(inode_u.bi_dir, inode_u.bi_dir_offset));
+
+ k = bch2_btree_iter_peek_slot(&iter1);
+ ret = bkey_err(k);
+ if (ret)
+ goto err;
- return bch2_readdir(c, file, ctx);
-}
+ if (k.k->type != KEY_TYPE_dirent) {
+ ret = -BCH_ERR_ENOENT_dirent_doesnt_match_inode;
+ goto err;
+ }
-static const struct file_operations bch_file_operations = {
- .llseek = bch2_llseek,
- .read_iter = generic_file_read_iter,
- .write_iter = bch2_write_iter,
- .mmap = bch2_mmap,
- .open = generic_file_open,
- .fsync = bch2_fsync,
- .splice_read = generic_file_splice_read,
- .splice_write = iter_file_splice_write,
- .fallocate = bch2_fallocate_dispatch,
- .unlocked_ioctl = bch2_fs_file_ioctl,
-#ifdef CONFIG_COMPAT
- .compat_ioctl = bch2_compat_fs_ioctl,
-#endif
-};
+ d = bkey_s_c_to_dirent(k);
+ ret = bch2_dirent_read_target(trans, inode_inum(dir), d, &target);
+ if (ret > 0)
+ ret = -BCH_ERR_ENOENT_dirent_doesnt_match_inode;
+ if (ret)
+ goto err;
-static const struct inode_operations bch_file_inode_operations = {
- .setattr = bch2_setattr,
- .fiemap = bch2_fiemap,
- .listxattr = bch2_xattr_list,
- .get_acl = bch2_get_acl,
- .set_acl = bch2_set_acl,
-};
+ if (target.subvol == inode->ei_subvol &&
+ target.inum == inode->ei_inode.bi_inum)
+ goto found;
+ } else {
+ /*
+ * File with multiple hardlinks and our backref is to the wrong
+ * directory - linear search:
+ */
+ for_each_btree_key_continue_norestart(iter2, 0, k, ret) {
+ if (k.k->p.inode > dir->ei_inode.bi_inum)
+ break;
-static const struct inode_operations bch_dir_inode_operations = {
- .lookup = bch2_lookup,
- .create = bch2_create,
- .link = bch2_link,
- .unlink = bch2_unlink,
- .symlink = bch2_symlink,
- .mkdir = bch2_mkdir,
- .rmdir = bch2_rmdir,
- .mknod = bch2_mknod,
- .rename = bch2_rename2,
- .setattr = bch2_setattr,
- .tmpfile = bch2_tmpfile,
- .listxattr = bch2_xattr_list,
- .get_acl = bch2_get_acl,
- .set_acl = bch2_set_acl,
-};
+ if (k.k->type != KEY_TYPE_dirent)
+ continue;
-static const struct file_operations bch_dir_file_operations = {
- .llseek = bch2_dir_llseek,
- .read = generic_read_dir,
- .iterate = bch2_vfs_readdir,
- .fsync = bch2_fsync,
- .unlocked_ioctl = bch2_fs_file_ioctl,
-#ifdef CONFIG_COMPAT
- .compat_ioctl = bch2_compat_fs_ioctl,
-#endif
-};
+ d = bkey_s_c_to_dirent(k);
+ ret = bch2_dirent_read_target(trans, inode_inum(dir), d, &target);
+ if (ret < 0)
+ break;
+ if (ret)
+ continue;
-static const struct inode_operations bch_symlink_inode_operations = {
- .get_link = page_get_link,
- .setattr = bch2_setattr,
- .listxattr = bch2_xattr_list,
- .get_acl = bch2_get_acl,
- .set_acl = bch2_set_acl,
-};
+ if (target.subvol == inode->ei_subvol &&
+ target.inum == inode->ei_inode.bi_inum)
+ goto found;
+ }
+ }
-static const struct inode_operations bch_special_inode_operations = {
- .setattr = bch2_setattr,
- .listxattr = bch2_xattr_list,
- .get_acl = bch2_get_acl,
- .set_acl = bch2_set_acl,
-};
+ ret = -ENOENT;
+ goto err;
+found:
+ dirent_name = bch2_dirent_get_name(d);
-static const struct address_space_operations bch_address_space_operations = {
- .writepage = bch2_writepage,
- .readpage = bch2_readpage,
- .writepages = bch2_writepages,
- .readpages = bch2_readpages,
- .set_page_dirty = bch2_set_page_dirty,
- .write_begin = bch2_write_begin,
- .write_end = bch2_write_end,
- .invalidatepage = bch2_invalidatepage,
- .releasepage = bch2_releasepage,
- .direct_IO = bch2_direct_IO,
-#ifdef CONFIG_MIGRATION
- .migratepage = bch2_migrate_page,
-#endif
- .error_remove_page = generic_error_remove_page,
-};
+ name_len = min_t(unsigned, dirent_name.len, NAME_MAX);
+ memcpy(name, dirent_name.name, name_len);
+ name[name_len] = '\0';
+err:
+ if (bch2_err_matches(ret, BCH_ERR_transaction_restart))
+ goto retry;
-static void bch2_vfs_inode_init(struct bch_fs *c,
- struct bch_inode_info *ei,
- struct bch_inode_unpacked *bi)
-{
- struct inode *inode = &ei->vfs_inode;
+ bch2_trans_iter_exit(trans, &iter1);
+ bch2_trans_iter_exit(trans, &iter2);
+ bch2_trans_put(trans);
- pr_debug("init inode %llu with mode %o",
- bi->inum, bi->i_mode);
+ return ret;
+}
- ei->i_flags = bi->i_flags;
- ei->i_size = bi->i_size;
+static const struct export_operations bch_export_ops = {
+ .encode_fh = bch2_encode_fh,
+ .fh_to_dentry = bch2_fh_to_dentry,
+ .fh_to_parent = bch2_fh_to_parent,
+ .get_parent = bch2_get_parent,
+ .get_name = bch2_get_name,
+};
- inode->i_mode = bi->i_mode;
- i_uid_write(inode, bi->i_uid);
- i_gid_write(inode, bi->i_gid);
+static void bch2_vfs_inode_init(struct btree_trans *trans, subvol_inum inum,
+ struct bch_inode_info *inode,
+ struct bch_inode_unpacked *bi,
+ struct bch_subvolume *subvol)
+{
+ bch2_iget5_set(&inode->v, &inum);
+ bch2_inode_update_after_write(trans, inode, bi, ~0);
- atomic64_set(&ei->i_sectors, bi->i_sectors);
- inode->i_blocks = bi->i_sectors;
+ if (BCH_SUBVOLUME_SNAP(subvol))
+ set_bit(EI_INODE_SNAPSHOT, &inode->ei_flags);
+ else
+ clear_bit(EI_INODE_SNAPSHOT, &inode->ei_flags);
- inode->i_ino = bi->inum;
- set_nlink(inode, bi->i_nlink + nlink_bias(inode->i_mode));
- inode->i_rdev = bi->i_dev;
- inode->i_generation = bi->i_generation;
- inode->i_size = bi->i_size;
- inode->i_atime = bch2_time_to_timespec(c, bi->i_atime);
- inode->i_mtime = bch2_time_to_timespec(c, bi->i_mtime);
- inode->i_ctime = bch2_time_to_timespec(c, bi->i_ctime);
- bch2_inode_flags_to_vfs(inode);
+ inode->v.i_blocks = bi->bi_sectors;
+ inode->v.i_ino = bi->bi_inum;
+ inode->v.i_rdev = bi->bi_dev;
+ inode->v.i_generation = bi->bi_generation;
+ inode->v.i_size = bi->bi_size;
- ei->str_hash = bch2_hash_info_init(c, bi);
+ inode->ei_flags = 0;
+ inode->ei_quota_reserved = 0;
+ inode->ei_qid = bch_qid(bi);
+ inode->ei_subvol = inum.subvol;
- inode->i_mapping->a_ops = &bch_address_space_operations;
+ inode->v.i_mapping->a_ops = &bch_address_space_operations;
- switch (inode->i_mode & S_IFMT) {
+ switch (inode->v.i_mode & S_IFMT) {
case S_IFREG:
- inode->i_op = &bch_file_inode_operations;
- inode->i_fop = &bch_file_operations;
+ inode->v.i_op = &bch_file_inode_operations;
+ inode->v.i_fop = &bch_file_operations;
break;
case S_IFDIR:
- inode->i_op = &bch_dir_inode_operations;
- inode->i_fop = &bch_dir_file_operations;
+ inode->v.i_op = &bch_dir_inode_operations;
+ inode->v.i_fop = &bch_dir_file_operations;
break;
case S_IFLNK:
- inode_nohighmem(inode);
- inode->i_op = &bch_symlink_inode_operations;
+ inode_nohighmem(&inode->v);
+ inode->v.i_op = &bch_symlink_inode_operations;
break;
default:
- init_special_inode(inode, inode->i_mode, inode->i_rdev);
- inode->i_op = &bch_special_inode_operations;
+ init_special_inode(&inode->v, inode->v.i_mode, inode->v.i_rdev);
+ inode->v.i_op = &bch_special_inode_operations;
break;
}
+
+ mapping_set_large_folios(inode->v.i_mapping);
}
static struct inode *bch2_alloc_inode(struct super_block *sb)
{
- struct bch_inode_info *ei;
+ struct bch_inode_info *inode;
- ei = kmem_cache_alloc(bch2_inode_cache, GFP_NOFS);
- if (!ei)
+ inode = kmem_cache_alloc(bch2_inode_cache, GFP_NOFS);
+ if (!inode)
return NULL;
- pr_debug("allocated %p", &ei->vfs_inode);
-
- inode_init_once(&ei->vfs_inode);
- mutex_init(&ei->update_lock);
- ei->journal_seq = 0;
- atomic_long_set(&ei->i_size_dirty_count, 0);
- atomic_long_set(&ei->i_sectors_dirty_count, 0);
+ inode_init_once(&inode->v);
+ mutex_init(&inode->ei_update_lock);
+ two_state_lock_init(&inode->ei_pagecache_lock);
+ INIT_LIST_HEAD(&inode->ei_vfs_inode_list);
+ mutex_init(&inode->ei_quota_lock);
- return &ei->vfs_inode;
+ return &inode->v;
}
static void bch2_i_callback(struct rcu_head *head)
{
- struct inode *inode = container_of(head, struct inode, i_rcu);
+ struct inode *vinode = container_of(head, struct inode, i_rcu);
+ struct bch_inode_info *inode = to_bch_ei(vinode);
+
+ kmem_cache_free(bch2_inode_cache, inode);
+}
- kmem_cache_free(bch2_inode_cache, to_bch_ei(inode));
+static void bch2_destroy_inode(struct inode *vinode)
+{
+ call_rcu(&vinode->i_rcu, bch2_i_callback);
}
-static void bch2_destroy_inode(struct inode *inode)
+static int inode_update_times_fn(struct btree_trans *trans,
+ struct bch_inode_info *inode,
+ struct bch_inode_unpacked *bi,
+ void *p)
{
- call_rcu(&inode->i_rcu, bch2_i_callback);
+ struct bch_fs *c = inode->v.i_sb->s_fs_info;
+
+ bi->bi_atime = timespec_to_bch2_time(c, inode_get_atime(&inode->v));
+ bi->bi_mtime = timespec_to_bch2_time(c, inode_get_mtime(&inode->v));
+ bi->bi_ctime = timespec_to_bch2_time(c, inode_get_ctime(&inode->v));
+
+ return 0;
}
-static int bch2_vfs_write_inode(struct inode *inode,
+static int bch2_vfs_write_inode(struct inode *vinode,
struct writeback_control *wbc)
{
- struct bch_fs *c = inode->i_sb->s_fs_info;
- struct bch_inode_info *ei = to_bch_ei(inode);
+ struct bch_fs *c = vinode->i_sb->s_fs_info;
+ struct bch_inode_info *inode = to_bch_ei(vinode);
int ret;
- mutex_lock(&ei->update_lock);
- ret = bch2_write_inode(c, ei);
- mutex_unlock(&ei->update_lock);
+ mutex_lock(&inode->ei_update_lock);
+ ret = bch2_write_inode(c, inode, inode_update_times_fn, NULL,
+ ATTR_ATIME|ATTR_MTIME|ATTR_CTIME);
+ mutex_unlock(&inode->ei_update_lock);
- if (c->opts.journal_flush_disabled)
- return ret;
+ return bch2_err_class(ret);
+}
+
+static void bch2_evict_inode(struct inode *vinode)
+{
+ struct bch_fs *c = vinode->i_sb->s_fs_info;
+ struct bch_inode_info *inode = to_bch_ei(vinode);
- if (!ret && wbc->sync_mode == WB_SYNC_ALL)
- ret = bch2_journal_flush_seq(&c->journal, ei->journal_seq);
+ truncate_inode_pages_final(&inode->v.i_data);
- return ret;
+ clear_inode(&inode->v);
+
+ BUG_ON(!is_bad_inode(&inode->v) && inode->ei_quota_reserved);
+
+ if (!inode->v.i_nlink && !is_bad_inode(&inode->v)) {
+ bch2_quota_acct(c, inode->ei_qid, Q_SPC, -((s64) inode->v.i_blocks),
+ KEY_TYPE_QUOTA_WARN);
+ bch2_quota_acct(c, inode->ei_qid, Q_INO, -1,
+ KEY_TYPE_QUOTA_WARN);
+ bch2_inode_rm(c, inode_inum(inode));
+ }
+
+ mutex_lock(&c->vfs_inodes_lock);
+ list_del_init(&inode->ei_vfs_inode_list);
+ mutex_unlock(&c->vfs_inodes_lock);
}
-static void bch2_evict_inode(struct inode *inode)
+void bch2_evict_subvolume_inodes(struct bch_fs *c, snapshot_id_list *s)
{
- struct bch_fs *c = inode->i_sb->s_fs_info;
+ struct bch_inode_info *inode;
+ DARRAY(struct bch_inode_info *) grabbed;
+ bool clean_pass = false, this_pass_clean;
+
+ /*
+ * Initially, we scan for inodes without I_DONTCACHE, then mark them to
+ * be pruned with d_mark_dontcache().
+ *
+ * Once we've had a clean pass where we didn't find any inodes without
+ * I_DONTCACHE, we wait for them to be freed:
+ */
+
+ darray_init(&grabbed);
+ darray_make_room(&grabbed, 1024);
+again:
+ cond_resched();
+ this_pass_clean = true;
+
+ mutex_lock(&c->vfs_inodes_lock);
+ list_for_each_entry(inode, &c->vfs_inodes_list, ei_vfs_inode_list) {
+ if (!snapshot_list_has_id(s, inode->ei_subvol))
+ continue;
+
+ if (!(inode->v.i_state & I_DONTCACHE) &&
+ !(inode->v.i_state & I_FREEING) &&
+ igrab(&inode->v)) {
+ this_pass_clean = false;
- truncate_inode_pages_final(&inode->i_data);
+ if (darray_push_gfp(&grabbed, inode, GFP_ATOMIC|__GFP_NOWARN)) {
+ iput(&inode->v);
+ break;
+ }
+ } else if (clean_pass && this_pass_clean) {
+ wait_queue_head_t *wq = bit_waitqueue(&inode->v.i_state, __I_NEW);
+ DEFINE_WAIT_BIT(wait, &inode->v.i_state, __I_NEW);
- if (!bch2_journal_error(&c->journal) && !is_bad_inode(inode)) {
- struct bch_inode_info *ei = to_bch_ei(inode);
+ prepare_to_wait(wq, &wait.wq_entry, TASK_UNINTERRUPTIBLE);
+ mutex_unlock(&c->vfs_inodes_lock);
- /* XXX - we want to check this stuff iff there weren't IO errors: */
- BUG_ON(atomic_long_read(&ei->i_sectors_dirty_count));
- BUG_ON(atomic64_read(&ei->i_sectors) != inode->i_blocks);
+ schedule();
+ finish_wait(wq, &wait.wq_entry);
+ goto again;
+ }
}
+ mutex_unlock(&c->vfs_inodes_lock);
- clear_inode(inode);
+ darray_for_each(grabbed, i) {
+ inode = *i;
+ d_mark_dontcache(&inode->v);
+ d_prune_aliases(&inode->v);
+ iput(&inode->v);
+ }
+ grabbed.nr = 0;
- if (!inode->i_nlink && !is_bad_inode(inode)) {
- bch2_inode_rm(c, inode->i_ino);
- atomic_long_dec(&c->nr_inodes);
+ if (!clean_pass || !this_pass_clean) {
+ clean_pass = this_pass_clean;
+ goto again;
}
+
+ darray_exit(&grabbed);
}
static int bch2_statfs(struct dentry *dentry, struct kstatfs *buf)
{
struct super_block *sb = dentry->d_sb;
struct bch_fs *c = sb->s_fs_info;
- u64 fsid;
+ struct bch_fs_usage_short usage = bch2_fs_usage_read_short(c);
+ unsigned shift = sb->s_blocksize_bits - 9;
+ /*
+ * this assumes inodes take up 64 bytes, which is a decent average
+ * number:
+ */
+ u64 avail_inodes = ((usage.capacity - usage.used) << 3);
- buf->f_type = BCACHE_STATFS_MAGIC;
+ buf->f_type = BCACHEFS_STATFS_MAGIC;
buf->f_bsize = sb->s_blocksize;
- buf->f_blocks = c->capacity >> PAGE_SECTOR_SHIFT;
- buf->f_bfree = (c->capacity - bch2_fs_sectors_used(c)) >> PAGE_SECTOR_SHIFT;
- buf->f_bavail = buf->f_bfree;
- buf->f_files = atomic_long_read(&c->nr_inodes);
- buf->f_ffree = U64_MAX;
-
- fsid = le64_to_cpup((void *) c->sb.user_uuid.b) ^
- le64_to_cpup((void *) c->sb.user_uuid.b + sizeof(u64));
- buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL;
- buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL;
- buf->f_namelen = NAME_MAX;
+ buf->f_blocks = usage.capacity >> shift;
+ buf->f_bfree = usage.free >> shift;
+ buf->f_bavail = avail_factor(usage.free) >> shift;
+
+ buf->f_files = usage.nr_inodes + avail_inodes;
+ buf->f_ffree = avail_inodes;
+
+ buf->f_fsid = uuid_to_fsid(c->sb.user_uuid.b);
+ buf->f_namelen = BCH_NAME_MAX;
return 0;
}
static int bch2_sync_fs(struct super_block *sb, int wait)
{
struct bch_fs *c = sb->s_fs_info;
+ int ret;
+
+ if (c->opts.journal_flush_disabled)
+ return 0;
if (!wait) {
bch2_journal_flush_async(&c->journal, NULL);
return 0;
}
- return bch2_journal_flush(&c->journal);
+ ret = bch2_journal_flush(&c->journal);
+ return bch2_err_class(ret);
}
-static struct bch_fs *bch2_open_as_blockdevs(const char *_dev_name,
- struct bch_opts opts)
+static struct bch_fs *bch2_path_to_fs(const char *path)
{
- size_t nr_devs = 0, i = 0;
- char *dev_name, *s, **devs;
- struct bch_fs *c = NULL;
- const char *err = "cannot allocate memory";
-
- dev_name = kstrdup(_dev_name, GFP_KERNEL);
- if (!dev_name)
- return NULL;
-
- for (s = dev_name; s; s = strchr(s + 1, ':'))
- nr_devs++;
+ struct bch_fs *c;
+ dev_t dev;
+ int ret;
- devs = kcalloc(nr_devs, sizeof(const char *), GFP_KERNEL);
- if (!devs)
- goto err;
+ ret = lookup_bdev(path, &dev);
+ if (ret)
+ return ERR_PTR(ret);
- for (i = 0, s = dev_name;
- s;
- (s = strchr(s, ':')) && (*s++ = '\0'))
- devs[i++] = s;
+ c = bch2_dev_to_fs(dev);
+ if (c)
+ closure_put(&c->cl);
+ return c ?: ERR_PTR(-ENOENT);
+}
- err = bch2_fs_open(devs, nr_devs, opts, &c);
- if (err) {
- /*
- * Already open?
- * Look up each block device, make sure they all belong to a
- * filesystem and they all belong to the _same_ filesystem
- */
+static int bch2_remount(struct super_block *sb, int *flags, char *data)
+{
+ struct bch_fs *c = sb->s_fs_info;
+ struct bch_opts opts = bch2_opts_empty();
+ int ret;
- for (i = 0; i < nr_devs; i++) {
- struct block_device *bdev = lookup_bdev(devs[i]);
- struct bch_fs *c2;
+ ret = bch2_parse_mount_opts(c, &opts, data);
+ if (ret)
+ goto err;
- if (IS_ERR(bdev))
- goto err;
+ opt_set(opts, read_only, (*flags & SB_RDONLY) != 0);
- c2 = bch2_bdev_to_fs(bdev);
- bdput(bdev);
+ if (opts.read_only != c->opts.read_only) {
+ down_write(&c->state_lock);
- if (!c)
- c = c2;
- else if (c2)
- closure_put(&c2->cl);
+ if (opts.read_only) {
+ bch2_fs_read_only(c);
- if (!c)
- goto err;
- if (c != c2) {
- closure_put(&c->cl);
+ sb->s_flags |= SB_RDONLY;
+ } else {
+ ret = bch2_fs_read_write(c);
+ if (ret) {
+ bch_err(c, "error going rw: %i", ret);
+ up_write(&c->state_lock);
+ ret = -EINVAL;
goto err;
}
- }
- mutex_lock(&c->state_lock);
-
- if (!bch2_fs_running(c)) {
- mutex_unlock(&c->state_lock);
- closure_put(&c->cl);
- err = "incomplete filesystem";
- c = NULL;
- goto err;
+ sb->s_flags &= ~SB_RDONLY;
}
- mutex_unlock(&c->state_lock);
+ c->opts.read_only = opts.read_only;
+
+ up_write(&c->state_lock);
}
- set_bit(BCH_FS_BDEV_MOUNTED, &c->flags);
+ if (opt_defined(opts, errors))
+ c->opts.errors = opts.errors;
err:
- kfree(devs);
- kfree(dev_name);
+ return bch2_err_class(ret);
+}
- if (!c)
- pr_err("bch_fs_open err %s", err);
- return c;
+static int bch2_show_devname(struct seq_file *seq, struct dentry *root)
+{
+ struct bch_fs *c = root->d_sb->s_fs_info;
+ bool first = true;
+
+ for_each_online_member(c, ca) {
+ if (!first)
+ seq_putc(seq, ':');
+ first = false;
+ seq_puts(seq, ca->disk_sb.sb_name);
+ }
+
+ return 0;
}
-static int bch2_remount(struct super_block *sb, int *flags, char *data)
+static int bch2_show_options(struct seq_file *seq, struct dentry *root)
{
- struct bch_fs *c = sb->s_fs_info;
- struct bch_opts opts = bch2_opts_empty();
- int ret;
+ struct bch_fs *c = root->d_sb->s_fs_info;
+ enum bch_opt_id i;
+ struct printbuf buf = PRINTBUF;
+ int ret = 0;
- opts.read_only = (*flags & MS_RDONLY) != 0;
+ for (i = 0; i < bch2_opts_nr; i++) {
+ const struct bch_option *opt = &bch2_opt_table[i];
+ u64 v = bch2_opt_get_by_id(&c->opts, i);
- ret = bch2_parse_mount_opts(&opts, data);
- if (ret)
- return ret;
+ if (!(opt->flags & OPT_MOUNT))
+ continue;
- if (opts.read_only >= 0 &&
- opts.read_only != c->opts.read_only) {
- const char *err = NULL;
+ if (v == bch2_opt_get_by_id(&bch2_opts_default, i))
+ continue;
- if (opts.read_only) {
- bch2_fs_read_only(c);
+ printbuf_reset(&buf);
+ bch2_opt_to_text(&buf, c, c->disk_sb.sb, opt, v,
+ OPT_SHOW_MOUNT_STYLE);
+ seq_putc(seq, ',');
+ seq_puts(seq, buf.buf);
+ }
- sb->s_flags |= MS_RDONLY;
- } else {
- err = bch2_fs_read_write(c);
- if (err) {
- bch_err(c, "error going rw: %s", err);
- return -EINVAL;
- }
+ if (buf.allocation_failure)
+ ret = -ENOMEM;
+ printbuf_exit(&buf);
+ return ret;
+}
- sb->s_flags &= ~MS_RDONLY;
- }
+static void bch2_put_super(struct super_block *sb)
+{
+ struct bch_fs *c = sb->s_fs_info;
- c->opts.read_only = opts.read_only;
- }
+ __bch2_fs_stop(c);
+}
- if (opts.errors >= 0)
- c->opts.errors = opts.errors;
+/*
+ * bcachefs doesn't currently integrate intwrite freeze protection but the
+ * internal write references serve the same purpose. Therefore reuse the
+ * read-only transition code to perform the quiesce. The caveat is that we don't
+ * currently have the ability to block tasks that want a write reference while
+ * the superblock is frozen. This is fine for now, but we should either add
+ * blocking support or find a way to integrate sb_start_intwrite() and friends.
+ */
+static int bch2_freeze(struct super_block *sb)
+{
+ struct bch_fs *c = sb->s_fs_info;
+
+ down_write(&c->state_lock);
+ bch2_fs_read_only(c);
+ up_write(&c->state_lock);
+ return 0;
+}
+
+static int bch2_unfreeze(struct super_block *sb)
+{
+ struct bch_fs *c = sb->s_fs_info;
+ int ret;
+
+ if (test_bit(BCH_FS_emergency_ro, &c->flags))
+ return 0;
+ down_write(&c->state_lock);
+ ret = bch2_fs_read_write(c);
+ up_write(&c->state_lock);
return ret;
}
.evict_inode = bch2_evict_inode,
.sync_fs = bch2_sync_fs,
.statfs = bch2_statfs,
- .show_options = generic_show_options,
+ .show_devname = bch2_show_devname,
+ .show_options = bch2_show_options,
.remount_fs = bch2_remount,
-#if 0
.put_super = bch2_put_super,
.freeze_fs = bch2_freeze,
.unfreeze_fs = bch2_unfreeze,
-#endif
};
-static int bch2_test_super(struct super_block *s, void *data)
-{
- return s->s_fs_info == data;
-}
-
static int bch2_set_super(struct super_block *s, void *data)
{
s->s_fs_info = data;
return 0;
}
+static int bch2_noset_super(struct super_block *s, void *data)
+{
+ return -EBUSY;
+}
+
+typedef DARRAY(struct bch_fs *) darray_fs;
+
+static int bch2_test_super(struct super_block *s, void *data)
+{
+ struct bch_fs *c = s->s_fs_info;
+ darray_fs *d = data;
+
+ if (!c)
+ return false;
+
+ darray_for_each(*d, i)
+ if (c != *i)
+ return false;
+ return true;
+}
+
static struct dentry *bch2_mount(struct file_system_type *fs_type,
int flags, const char *dev_name, void *data)
{
struct bch_fs *c;
- struct bch_dev *ca;
struct super_block *sb;
- struct inode *inode;
+ struct inode *vinode;
struct bch_opts opts = bch2_opts_empty();
- unsigned i;
int ret;
- opts.read_only = (flags & MS_RDONLY) != 0;
+ opt_set(opts, read_only, (flags & SB_RDONLY) != 0);
- ret = bch2_parse_mount_opts(&opts, data);
+ ret = bch2_parse_mount_opts(NULL, &opts, data);
if (ret)
return ERR_PTR(ret);
- c = bch2_open_as_blockdevs(dev_name, opts);
- if (!c)
- return ERR_PTR(-ENOENT);
+ if (!dev_name || strlen(dev_name) == 0)
+ return ERR_PTR(-EINVAL);
+
+ darray_str devs;
+ ret = bch2_split_devs(dev_name, &devs);
+ if (ret)
+ return ERR_PTR(ret);
+
+ darray_fs devs_to_fs = {};
+ darray_for_each(devs, i) {
+ ret = darray_push(&devs_to_fs, bch2_path_to_fs(*i));
+ if (ret) {
+ sb = ERR_PTR(ret);
+ goto got_sb;
+ }
+ }
+
+ sb = sget(fs_type, bch2_test_super, bch2_noset_super, flags|SB_NOSEC, &devs_to_fs);
+ if (!IS_ERR(sb))
+ goto got_sb;
+
+ c = bch2_fs_open(devs.data, devs.nr, opts);
+ if (IS_ERR(c)) {
+ sb = ERR_CAST(c);
+ goto got_sb;
+ }
+
+ /* Some options can't be parsed until after the fs is started: */
+ ret = bch2_parse_mount_opts(c, &opts, data);
+ if (ret) {
+ bch2_fs_stop(c);
+ sb = ERR_PTR(ret);
+ goto got_sb;
+ }
+
+ bch2_opts_apply(&c->opts, opts);
+
+ sb = sget(fs_type, NULL, bch2_set_super, flags|SB_NOSEC, c);
+ if (IS_ERR(sb))
+ bch2_fs_stop(c);
+got_sb:
+ darray_exit(&devs_to_fs);
+ bch2_darray_str_exit(&devs);
- sb = sget(fs_type, bch2_test_super, bch2_set_super, flags|MS_NOSEC, c);
if (IS_ERR(sb)) {
- closure_put(&c->cl);
- return ERR_CAST(sb);
+ ret = PTR_ERR(sb);
+ ret = bch2_err_class(ret);
+ return ERR_PTR(ret);
}
- BUG_ON(sb->s_fs_info != c);
+ c = sb->s_fs_info;
if (sb->s_root) {
- closure_put(&c->cl);
-
- if ((flags ^ sb->s_flags) & MS_RDONLY) {
+ if ((flags ^ sb->s_flags) & SB_RDONLY) {
ret = -EBUSY;
goto err_put_super;
}
goto out;
}
- /* XXX: blocksize */
- sb->s_blocksize = PAGE_SIZE;
- sb->s_blocksize_bits = PAGE_SHIFT;
+ sb->s_blocksize = block_bytes(c);
+ sb->s_blocksize_bits = ilog2(block_bytes(c));
sb->s_maxbytes = MAX_LFS_FILESIZE;
sb->s_op = &bch_super_operations;
+ sb->s_export_op = &bch_export_ops;
+#ifdef CONFIG_BCACHEFS_QUOTA
+ sb->s_qcop = &bch2_quotactl_operations;
+ sb->s_quota_types = QTYPE_MASK_USR|QTYPE_MASK_GRP|QTYPE_MASK_PRJ;
+#endif
sb->s_xattr = bch2_xattr_handlers;
- sb->s_magic = BCACHE_STATFS_MAGIC;
- sb->s_time_gran = c->sb.time_precision;
+ sb->s_magic = BCACHEFS_STATFS_MAGIC;
+ sb->s_time_gran = c->sb.nsec_per_time_unit;
+ sb->s_time_min = div_s64(S64_MIN, c->sb.time_units_per_sec) + 1;
+ sb->s_time_max = div_s64(S64_MAX, c->sb.time_units_per_sec);
+ sb->s_uuid = c->sb.user_uuid;
c->vfs_sb = sb;
- sb->s_bdi = &c->bdi;
- strlcpy(sb->s_id, c->name, sizeof(sb->s_id));
+ strscpy(sb->s_id, c->name, sizeof(sb->s_id));
+
+ ret = super_setup_bdi(sb);
+ if (ret)
+ goto err_put_super;
- for_each_online_member(ca, c, i) {
+ sb->s_bdi->ra_pages = VM_READAHEAD_PAGES;
+
+ for_each_online_member(c, ca) {
struct block_device *bdev = ca->disk_sb.bdev;
/* XXX: create an anonymous device for multi device filesystems */
break;
}
- if (opts.posix_acl < 0)
- sb->s_flags |= MS_POSIXACL;
- else
- sb->s_flags |= opts.posix_acl ? MS_POSIXACL : 0;
+ c->dev = sb->s_dev;
- inode = bch2_vfs_inode_get(sb, BCACHE_ROOT_INO);
- if (IS_ERR(inode)) {
- ret = PTR_ERR(inode);
+#ifdef CONFIG_BCACHEFS_POSIX_ACL
+ if (c->opts.acl)
+ sb->s_flags |= SB_POSIXACL;
+#endif
+
+ sb->s_shrink->seeks = 0;
+
+ vinode = bch2_vfs_inode_get(c, BCACHEFS_ROOT_SUBVOL_INUM);
+ ret = PTR_ERR_OR_ZERO(vinode);
+ bch_err_msg(c, ret, "mounting: error getting root inode");
+ if (ret)
goto err_put_super;
- }
- sb->s_root = d_make_root(inode);
+ sb->s_root = d_make_root(vinode);
if (!sb->s_root) {
+ bch_err(c, "error mounting: error allocating root dentry");
ret = -ENOMEM;
goto err_put_super;
}
- sb->s_flags |= MS_ACTIVE;
+ sb->s_flags |= SB_ACTIVE;
out:
return dget(sb->s_root);
err_put_super:
deactivate_locked_super(sb);
- return ERR_PTR(ret);
+ return ERR_PTR(bch2_err_class(ret));
}
static void bch2_kill_sb(struct super_block *sb)
struct bch_fs *c = sb->s_fs_info;
generic_shutdown_super(sb);
-
- if (test_bit(BCH_FS_BDEV_MOUNTED, &c->flags))
- bch2_fs_stop(c);
- else
- closure_put(&c->cl);
+ bch2_fs_free(c);
}
static struct file_system_type bcache_fs_type = {
void bch2_vfs_exit(void)
{
unregister_filesystem(&bcache_fs_type);
- if (bch2_dio_write_bioset)
- bioset_free(bch2_dio_write_bioset);
- if (bch2_dio_read_bioset)
- bioset_free(bch2_dio_read_bioset);
- if (bch2_writepage_bioset)
- bioset_free(bch2_writepage_bioset);
- if (bch2_inode_cache)
- kmem_cache_destroy(bch2_inode_cache);
+ kmem_cache_destroy(bch2_inode_cache);
}
int __init bch2_vfs_init(void)
{
int ret = -ENOMEM;
- bch2_inode_cache = KMEM_CACHE(bch_inode_info, 0);
+ bch2_inode_cache = KMEM_CACHE(bch_inode_info, SLAB_RECLAIM_ACCOUNT);
if (!bch2_inode_cache)
goto err;
- bch2_writepage_bioset =
- bioset_create(4, offsetof(struct bch_writepage_io, bio.bio));
- if (!bch2_writepage_bioset)
- goto err;
-
- bch2_dio_read_bioset = bioset_create(4, offsetof(struct dio_read, rbio.bio));
- if (!bch2_dio_read_bioset)
- goto err;
-
- bch2_dio_write_bioset = bioset_create(4, offsetof(struct dio_write, bio.bio));
- if (!bch2_dio_write_bioset)
- goto err;
-
ret = register_filesystem(&bcache_fs_type);
if (ret)
goto err;
bch2_vfs_exit();
return ret;
}
+
+#endif /* NO_BCACHEFS_FS */
projects / bcachefs-tools-debian / blobdiff