#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.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/exportfs.h>
+#include <linux/fiemap.h>
#include <linux/module.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 *);
-static void journal_seq_copy(struct bch_inode_info *dst,
- u64 journal_seq)
-{
- u64 old, v = READ_ONCE(dst->ei_journal_seq);
-
- do {
- old = v;
-
- if (old >= journal_seq)
- break;
- } while ((v = cmpxchg(&dst->ei_journal_seq, old, journal_seq)) != old);
-}
-
-/*
- * 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 bch_fs *c,
+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->v.i_atime = bch2_time_to_timespec(c, bi->bi_atime);
+ inode_set_atime_to_ts(&inode->v, bch2_time_to_timespec(c, bi->bi_atime));
if (fields & ATTR_MTIME)
- inode->v.i_mtime = bch2_time_to_timespec(c, bi->bi_mtime);
+ inode_set_mtime_to_ts(&inode->v, bch2_time_to_timespec(c, bi->bi_mtime));
if (fields & ATTR_CTIME)
- inode->v.i_ctime = bch2_time_to_timespec(c, bi->bi_ctime);
+ inode_set_ctime_to_ts(&inode->v, bch2_time_to_timespec(c, bi->bi_ctime));
inode->ei_inode = *bi;
bch2_inode_flags_to_vfs(inode);
}
-int __must_check bch2_write_inode_trans(struct btree_trans *trans,
- struct bch_inode_info *inode,
- struct bch_inode_unpacked *inode_u,
- inode_set_fn set,
- void *p)
-{
- struct btree_iter *iter = NULL;
- struct bkey_inode_buf *inode_p;
- int ret;
-
- lockdep_assert_held(&inode->ei_update_lock);
-
- iter = bch2_trans_get_iter(trans, BTREE_ID_INODES,
- POS(inode->v.i_ino, 0),
- BTREE_ITER_SLOTS|BTREE_ITER_INTENT);
- if (IS_ERR(iter))
- return PTR_ERR(iter);
-
- /* The btree node lock is our lock on the inode: */
- ret = bch2_btree_iter_traverse(iter);
- if (ret)
- return ret;
-
- *inode_u = inode->ei_inode;
-
- if (set) {
- ret = set(inode, inode_u, p);
- if (ret)
- return ret;
- }
-
- inode_p = bch2_trans_kmalloc(trans, sizeof(*inode_p));
- if (IS_ERR(inode_p))
- return PTR_ERR(inode_p);
-
- bch2_inode_pack(inode_p, inode_u);
- bch2_trans_update(trans, iter, &inode_p->inode.k_i);
-
- return 0;
-}
-
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_trans trans;
+ struct btree_trans *trans = bch2_trans_get(c);
+ struct btree_iter iter = { NULL };
struct bch_inode_unpacked inode_u;
int ret;
-
- bch2_trans_init(&trans, c, 0, 0);
retry:
- bch2_trans_begin(&trans);
-
- ret = bch2_write_inode_trans(&trans, inode, &inode_u, set, p) ?:
- bch2_trans_commit(&trans, NULL,
- &inode->ei_journal_seq,
- BTREE_INSERT_ATOMIC|
- BTREE_INSERT_NOUNLOCK|
- BTREE_INSERT_NOFAIL);
- if (ret == -EINTR)
- goto 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);
/*
* the btree node lock protects inode->ei_inode, not ei_update_lock;
* this is important for inode updates via bchfs_write_index_update
*/
if (!ret)
- bch2_inode_update_after_write(c, inode, &inode_u, fields);
+ bch2_inode_update_after_write(trans, inode, &inode_u, fields);
+
+ bch2_trans_iter_exit(trans, &iter);
- bch2_trans_exit(&trans);
+ if (bch2_err_matches(ret, BCH_ERR_transaction_restart))
+ goto retry;
+
+ 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);
+
+ bch2_trans_put(trans);
return ret < 0 ? ret : 0;
}
return ret;
}
-int bch2_reinherit_attrs_fn(struct bch_inode_info *inode,
- struct bch_inode_unpacked *bi,
- void *p)
+static int bch2_iget5_test(struct inode *vinode, void *p)
{
- struct bch_inode_info *dir = p;
- u64 src, dst;
- unsigned id;
- int ret = 1;
-
- for (id = 0; id < Inode_opt_nr; id++) {
- if (bi->bi_fields_set & (1 << id))
- continue;
+ struct bch_inode_info *inode = to_bch_ei(vinode);
+ subvol_inum *inum = p;
- src = bch2_inode_opt_get(&dir->ei_inode, id);
- dst = bch2_inode_opt_get(bi, id);
+ return inode->ei_subvol == inum->subvol &&
+ inode->ei_inode.bi_inum == inum->inum;
+}
- if (src == dst)
- continue;
+static int bch2_iget5_set(struct inode *vinode, void *p)
+{
+ struct bch_inode_info *inode = to_bch_ei(vinode);
+ subvol_inum *inum = p;
- bch2_inode_opt_set(bi, id, src);
- ret = 0;
- }
+ inode->v.i_ino = inum->inum;
+ inode->ei_subvol = inum->subvol;
+ inode->ei_inode.bi_inum = inum->inum;
+ return 0;
+}
- return ret;
+static unsigned bch2_inode_hash(subvol_inum inum)
+{
+ return jhash_3words(inum.subvol, inum.inum >> 32, inum.inum, JHASH_INITVAL);
}
-struct inode *bch2_vfs_inode_get(struct bch_fs *c, u64 inum)
+struct inode *bch2_vfs_inode_get(struct bch_fs *c, subvol_inum inum)
{
struct bch_inode_unpacked inode_u;
struct bch_inode_info *inode;
+ struct btree_trans *trans;
+ struct bch_subvolume subvol;
int ret;
- inode = to_bch_ei(iget_locked(c->vfs_sb, inum));
+ inode = to_bch_ei(iget5_locked(c->vfs_sb,
+ bch2_inode_hash(inum),
+ bch2_iget5_test,
+ bch2_iget5_set,
+ &inum));
if (unlikely(!inode))
return ERR_PTR(-ENOMEM);
if (!(inode->v.i_state & I_NEW))
return &inode->v;
- ret = bch2_inode_find_by_inum(c, inum, &inode_u);
+ trans = bch2_trans_get(c);
+ ret = lockrestart_do(trans,
+ bch2_subvolume_get(trans, inum.subvol, true, 0, &subvol) ?:
+ bch2_inode_find_by_inum_trans(trans, inum, &inode_u));
+
+ if (!ret)
+ bch2_vfs_inode_init(trans, inum, inode, &inode_u, &subvol);
+ bch2_trans_put(trans);
+
if (ret) {
iget_failed(&inode->v);
- return ERR_PTR(ret);
+ return ERR_PTR(bch2_err_class(ret));
}
- bch2_vfs_inode_init(c, inode, &inode_u);
-
- inode->ei_journal_seq = bch2_inode_journal_seq(&c->journal, inum);
+ mutex_lock(&c->vfs_inodes_lock);
+ list_add(&inode->ei_vfs_inode_list, &c->vfs_inodes_list);
+ mutex_unlock(&c->vfs_inodes_lock);
unlock_new_inode(&inode->v);
return &inode->v;
}
-static void bch2_inode_init_owner(struct bch_inode_unpacked *inode_u,
- const struct inode *dir, umode_t mode)
-{
- kuid_t uid = current_fsuid();
- kgid_t gid;
-
- if (dir && dir->i_mode & S_ISGID) {
- gid = dir->i_gid;
- if (S_ISDIR(mode))
- mode |= S_ISGID;
- } else
- gid = current_fsgid();
-
- inode_u->bi_uid = from_kuid(dir->i_sb->s_user_ns, uid);
- inode_u->bi_gid = from_kgid(dir->i_sb->s_user_ns, gid);
- inode_u->bi_mode = mode;
-}
-
-static int inode_update_for_create_fn(struct bch_inode_info *inode,
- struct bch_inode_unpacked *bi,
- void *p)
-{
- struct bch_fs *c = inode->v.i_sb->s_fs_info;
- struct bch_inode_unpacked *new_inode = p;
-
- bi->bi_mtime = bi->bi_ctime = bch2_current_time(c);
-
- if (S_ISDIR(new_inode->bi_mode))
- bi->bi_nlink++;
-
- return 0;
-}
-
-static struct bch_inode_info *
-__bch2_create(struct bch_inode_info *dir, struct dentry *dentry,
- umode_t mode, dev_t rdev, bool tmpfile)
+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 bch_fs *c = dir->v.i_sb->s_fs_info;
- struct btree_trans trans;
+ struct btree_trans *trans;
struct bch_inode_unpacked dir_u;
struct bch_inode_info *inode, *old;
struct bch_inode_unpacked inode_u;
- struct bch_hash_info hash_info;
struct posix_acl *default_acl = NULL, *acl = NULL;
+ subvol_inum inum;
+ struct bch_subvolume subvol;
u64 journal_seq = 0;
int ret;
- bch2_inode_init(c, &inode_u, 0, 0, 0, rdev, &dir->ei_inode);
- bch2_inode_init_owner(&inode_u, &dir->v, mode);
-
- hash_info = bch2_hash_info_init(c, &inode_u);
-
- if (tmpfile)
- inode_u.bi_flags |= BCH_INODE_UNLINKED;
-
- ret = bch2_quota_acct(c, bch_qid(&inode_u), Q_INO, 1,
- KEY_TYPE_QUOTA_PREALLOC);
- if (ret)
- return ERR_PTR(ret);
-
+ /*
+ * 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, &inode_u.bi_mode, &default_acl, &acl);
+ ret = posix_acl_create(&dir->v, &mode, &default_acl, &acl);
if (ret)
- goto err;
+ return ERR_PTR(ret);
#endif
-
- /*
- * preallocate vfs inode before btree transaction, so that nothing can
- * fail after the transaction succeeds:
- */
inode = to_bch_ei(new_inode(c->vfs_sb));
if (unlikely(!inode)) {
- ret = -ENOMEM;
+ inode = ERR_PTR(-ENOMEM);
goto err;
}
- if (!tmpfile)
+ bch2_inode_init_early(c, &inode_u);
+
+ if (!(flags & BCH_CREATE_TMPFILE))
mutex_lock(&dir->ei_update_lock);
- bch2_trans_init(&trans, c, 8, 1024);
+ trans = bch2_trans_get(c);
retry:
- bch2_trans_begin(&trans);
-
- ret = __bch2_inode_create(&trans, &inode_u,
- BLOCKDEV_INODE_MAX, 0,
- &c->unused_inode_hint) ?:
- (default_acl
- ? bch2_set_acl_trans(&trans, &inode_u, &hash_info,
- default_acl, ACL_TYPE_DEFAULT)
- : 0) ?:
- (acl
- ? bch2_set_acl_trans(&trans, &inode_u, &hash_info,
- acl, ACL_TYPE_ACCESS)
- : 0) ?:
- (!tmpfile
- ? __bch2_dirent_create(&trans, dir->v.i_ino,
- &dir->ei_str_hash,
- mode_to_type(mode),
- &dentry->d_name,
- inode_u.bi_inum,
- BCH_HASH_SET_MUST_CREATE)
- : 0) ?:
- (!tmpfile
- ? bch2_write_inode_trans(&trans, dir, &dir_u,
- inode_update_for_create_fn,
- &inode_u)
- : 0) ?:
- bch2_trans_commit(&trans, NULL,
- &journal_seq,
- BTREE_INSERT_ATOMIC|
- BTREE_INSERT_NOUNLOCK);
- if (ret == -EINTR)
- goto 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;
+
+ inum.subvol = inode_u.bi_subvol ?: dir->ei_subvol;
+ inum.inum = inode_u.bi_inum;
+
+ ret = bch2_subvolume_get(trans, inum.subvol, true,
+ BTREE_ITER_WITH_UPDATES, &subvol) ?:
+ bch2_trans_commit(trans, NULL, &journal_seq, 0);
+ if (unlikely(ret)) {
+ 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;
+ }
- if (!tmpfile) {
- bch2_inode_update_after_write(c, dir, &dir_u,
+ if (!(flags & BCH_CREATE_TMPFILE)) {
+ bch2_inode_update_after_write(trans, dir, &dir_u,
ATTR_MTIME|ATTR_CTIME);
- journal_seq_copy(dir, journal_seq);
mutex_unlock(&dir->ei_update_lock);
}
- bch2_vfs_inode_init(c, inode, &inode_u);
- journal_seq_copy(inode, journal_seq);
+ bch2_iget5_set(&inode->v, &inum);
+ bch2_vfs_inode_init(trans, inum, inode, &inode_u, &subvol);
set_cached_acl(&inode->v, ACL_TYPE_ACCESS, acl);
set_cached_acl(&inode->v, ACL_TYPE_DEFAULT, default_acl);
* thread pulling the inode in and modifying it:
*/
- old = to_bch_ei(insert_inode_locked2(&inode->v));
- if (unlikely(old)) {
+ inode->v.i_state |= I_CREATING;
+
+ 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)) {
/*
* We raced, another process pulled the new inode into cache
* before us:
*/
- old->ei_journal_seq = inode->ei_journal_seq;
make_bad_inode(&inode->v);
iput(&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);
}
- bch2_trans_exit(&trans);
-out:
+ bch2_trans_put(trans);
+err:
posix_acl_release(default_acl);
posix_acl_release(acl);
return inode;
err_trans:
- if (!tmpfile)
+ if (!(flags & BCH_CREATE_TMPFILE))
mutex_unlock(&dir->ei_update_lock);
- bch2_trans_exit(&trans);
+ bch2_trans_put(trans);
make_bad_inode(&inode->v);
iput(&inode->v);
-err:
- bch2_quota_acct(c, bch_qid(&inode_u), Q_INO, -1, KEY_TYPE_QUOTA_WARN);
inode = ERR_PTR(ret);
- goto out;
+ goto err;
}
/* methods */
{
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 inode *vinode = NULL;
- u64 inum;
+ subvol_inum inum = { .subvol = 1 };
+ int ret;
- inum = bch2_dirent_lookup(c, dir->v.i_ino,
- &dir->ei_str_hash,
- &dentry->d_name);
+ ret = bch2_dirent_lookup(c, inode_inum(dir), &hash,
+ &dentry->d_name, &inum);
- if (inum)
+ if (!ret)
vinode = bch2_vfs_inode_get(c, inum);
return d_splice_alias(vinode, dentry);
}
-static int bch2_create(struct inode *vdir, struct dentry *dentry,
- umode_t mode, bool excl)
+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(to_bch_ei(vdir), dentry, mode|S_IFREG, 0, false);
+ __bch2_create(idmap, to_bch_ei(vdir), dentry, mode, rdev,
+ (subvol_inum) { 0 }, 0);
if (IS_ERR(inode))
- return PTR_ERR(inode);
+ return bch2_err_class(PTR_ERR(inode));
d_instantiate(dentry, &inode->v);
return 0;
}
-static int inode_update_for_link_fn(struct bch_inode_info *inode,
- struct bch_inode_unpacked *bi,
- void *p)
+static int bch2_create(struct mnt_idmap *idmap,
+ struct inode *vdir, struct dentry *dentry,
+ umode_t mode, bool excl)
{
- struct bch_fs *c = inode->v.i_sb->s_fs_info;
-
- bi->bi_ctime = bch2_current_time(c);
- bch2_inode_nlink_inc(bi);
- return 0;
+ return bch2_mknod(idmap, vdir, dentry, mode|S_IFREG, 0);
}
static int __bch2_link(struct bch_fs *c,
struct bch_inode_info *dir,
struct dentry *dentry)
{
- struct btree_trans trans;
- struct bch_inode_unpacked inode_u;
+ struct btree_trans *trans = bch2_trans_get(c);
+ struct bch_inode_unpacked dir_u, inode_u;
int ret;
mutex_lock(&inode->ei_update_lock);
- bch2_trans_init(&trans, c, 4, 1024);
-retry:
- bch2_trans_begin(&trans);
-
- ret = __bch2_dirent_create(&trans, dir->v.i_ino,
- &dir->ei_str_hash,
- mode_to_type(inode->v.i_mode),
- &dentry->d_name,
- inode->v.i_ino,
- BCH_HASH_SET_MUST_CREATE) ?:
- bch2_write_inode_trans(&trans, inode, &inode_u,
- inode_update_for_link_fn,
- NULL) ?:
- bch2_trans_commit(&trans, NULL,
- &inode->ei_journal_seq,
- BTREE_INSERT_ATOMIC|
- BTREE_INSERT_NOUNLOCK);
-
- if (ret == -EINTR)
- goto retry;
- if (likely(!ret))
- bch2_inode_update_after_write(c, inode, &inode_u, ATTR_CTIME);
+ ret = commit_do(trans, NULL, NULL, 0,
+ bch2_link_trans(trans,
+ inode_inum(dir), &dir_u,
+ inode_inum(inode), &inode_u,
+ &dentry->d_name));
- bch2_trans_exit(&trans);
+ 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);
+ }
+
+ bch2_trans_put(trans);
mutex_unlock(&inode->ei_update_lock);
return ret;
}
lockdep_assert_held(&inode->v.i_rwsem);
- ret = __bch2_link(c, inode, dir, dentry);
+ 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 ret;
return 0;
}
-static int inode_update_dir_for_unlink_fn(struct bch_inode_info *inode,
- struct bch_inode_unpacked *bi,
- void *p)
-{
- struct bch_fs *c = inode->v.i_sb->s_fs_info;
- struct bch_inode_info *unlink_inode = p;
-
- bi->bi_mtime = bi->bi_ctime = bch2_current_time(c);
-
- bi->bi_nlink -= S_ISDIR(unlink_inode->v.i_mode);
-
- return 0;
-}
-
-static int inode_update_for_unlink_fn(struct bch_inode_info *inode,
- struct bch_inode_unpacked *bi,
- void *p)
-{
- struct bch_fs *c = inode->v.i_sb->s_fs_info;
-
- bi->bi_ctime = bch2_current_time(c);
- bch2_inode_nlink_dec(bi);
- return 0;
-}
-
-static int bch2_unlink(struct inode *vdir, struct dentry *dentry)
+int __bch2_unlink(struct inode *vdir, struct dentry *dentry,
+ bool deleting_snapshot)
{
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;
+ struct btree_trans *trans = bch2_trans_get(c);
int ret;
bch2_lock_inodes(INODE_UPDATE_LOCK, dir, inode);
- bch2_trans_init(&trans, c, 4, 1024);
-retry:
- bch2_trans_begin(&trans);
-
- ret = __bch2_dirent_delete(&trans, dir->v.i_ino,
- &dir->ei_str_hash,
- &dentry->d_name) ?:
- bch2_write_inode_trans(&trans, dir, &dir_u,
- inode_update_dir_for_unlink_fn,
- inode) ?:
- bch2_write_inode_trans(&trans, inode, &inode_u,
- inode_update_for_unlink_fn,
- NULL) ?:
- bch2_trans_commit(&trans, NULL,
- &dir->ei_journal_seq,
- BTREE_INSERT_ATOMIC|
- BTREE_INSERT_NOUNLOCK|
- BTREE_INSERT_NOFAIL);
- if (ret == -EINTR)
- goto retry;
- if (ret)
- goto err;
- if (dir->ei_journal_seq > inode->ei_journal_seq)
- inode->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;
- bch2_inode_update_after_write(c, dir, &dir_u,
+ bch2_inode_update_after_write(trans, dir, &dir_u,
ATTR_MTIME|ATTR_CTIME);
- bch2_inode_update_after_write(c, inode, &inode_u,
+ bch2_inode_update_after_write(trans, inode, &inode_u,
ATTR_MTIME);
+
+ 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_trans_exit(&trans);
bch2_unlock_inodes(INODE_UPDATE_LOCK, dir, inode);
+ bch2_trans_put(trans);
return ret;
}
-static int bch2_symlink(struct inode *vdir, struct dentry *dentry,
+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;
+
+ return bch2_subvol_is_ro(c, dir->ei_subvol) ?:
+ __bch2_unlink(vdir, dentry, false);
+}
+
+static int bch2_symlink(struct mnt_idmap *idmap,
+ struct inode *vdir, struct dentry *dentry,
const char *symname)
{
struct bch_fs *c = vdir->i_sb->s_fs_info;
struct bch_inode_info *dir = to_bch_ei(vdir), *inode;
int ret;
- inode = __bch2_create(dir, dentry, S_IFLNK|S_IRWXUGO, 0, true);
- if (unlikely(IS_ERR(inode)))
- return PTR_ERR(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->v);
ret = page_symlink(&inode->v, symname, strlen(symname) + 1);
if (unlikely(ret))
goto err;
- journal_seq_copy(dir, inode->ei_journal_seq);
-
ret = __bch2_link(c, inode, dir, dentry);
if (unlikely(ret))
goto err;
return ret;
}
-static int bch2_mkdir(struct inode *vdir, 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_inode_info *inode =
- __bch2_create(to_bch_ei(vdir), dentry, mode|S_IFDIR, 0, false);
-
- if (IS_ERR(inode))
- return PTR_ERR(inode);
-
- d_instantiate(dentry, &inode->v);
- return 0;
-}
-
-static int bch2_rmdir(struct inode *vdir, struct dentry *dentry)
-{
- struct bch_fs *c = vdir->i_sb->s_fs_info;
-
- if (bch2_empty_dir(c, dentry->d_inode->i_ino))
- return -ENOTEMPTY;
-
- return bch2_unlink(vdir, dentry);
-}
-
-static int bch2_mknod(struct inode *vdir, struct dentry *dentry,
- umode_t mode, dev_t rdev)
-{
- struct bch_inode_info *inode =
- __bch2_create(to_bch_ei(vdir), dentry, mode, rdev, false);
-
- if (IS_ERR(inode))
- return PTR_ERR(inode);
-
- d_instantiate(dentry, &inode->v);
- return 0;
-}
-
-struct rename_info {
- u64 now;
- struct bch_inode_info *src_dir;
- struct bch_inode_info *dst_dir;
- struct bch_inode_info *src_inode;
- struct bch_inode_info *dst_inode;
- enum bch_rename_mode mode;
-};
-
-static int inode_update_for_rename_fn(struct bch_inode_info *inode,
- struct bch_inode_unpacked *bi,
- void *p)
-{
- struct rename_info *info = p;
- int ret;
-
- if (inode == info->src_dir) {
- bi->bi_nlink -= S_ISDIR(info->src_inode->v.i_mode);
- bi->bi_nlink += info->dst_inode &&
- S_ISDIR(info->dst_inode->v.i_mode) &&
- info->mode == BCH_RENAME_EXCHANGE;
- }
-
- if (inode == info->dst_dir) {
- bi->bi_nlink += S_ISDIR(info->src_inode->v.i_mode);
- bi->bi_nlink -= info->dst_inode &&
- S_ISDIR(info->dst_inode->v.i_mode);
- }
-
- if (inode == info->src_inode) {
- ret = bch2_reinherit_attrs_fn(inode, bi, info->dst_dir);
-
- BUG_ON(!ret && S_ISDIR(info->src_inode->v.i_mode));
- }
-
- if (inode == info->dst_inode &&
- info->mode == BCH_RENAME_EXCHANGE) {
- ret = bch2_reinherit_attrs_fn(inode, bi, info->src_dir);
-
- BUG_ON(!ret && S_ISDIR(info->dst_inode->v.i_mode));
- }
-
- if (inode == info->dst_inode &&
- info->mode == BCH_RENAME_OVERWRITE) {
- BUG_ON(bi->bi_nlink &&
- S_ISDIR(info->dst_inode->v.i_mode));
-
- bch2_inode_nlink_dec(bi);
- }
-
- if (inode == info->src_dir ||
- inode == info->dst_dir)
- bi->bi_mtime = info->now;
- bi->bi_ctime = info->now;
-
- return 0;
+ return bch2_mknod(idmap, vdir, dentry, mode|S_IFDIR, 0);
}
-static int bch2_rename2(struct inode *src_vdir, struct dentry *src_dentry,
+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 rename_info i = {
- .src_dir = to_bch_ei(src_vdir),
- .dst_dir = to_bch_ei(dst_vdir),
- .src_inode = to_bch_ei(src_dentry->d_inode),
- .dst_inode = to_bch_ei(dst_dentry->d_inode),
- .mode = flags & RENAME_EXCHANGE
- ? BCH_RENAME_EXCHANGE
- : dst_dentry->d_inode
- ? BCH_RENAME_OVERWRITE : BCH_RENAME,
- };
- struct btree_trans trans;
+ 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;
- u64 journal_seq = 0;
+ 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;
if (flags & ~(RENAME_NOREPLACE|RENAME_EXCHANGE))
return -EINVAL;
- if (i.mode == BCH_RENAME_OVERWRITE) {
- if (S_ISDIR(i.src_inode->v.i_mode) !=
- S_ISDIR(i.dst_inode->v.i_mode))
- return -ENOTDIR;
-
- if (S_ISDIR(i.src_inode->v.i_mode) &&
- bch2_empty_dir(c, i.dst_inode->v.i_ino))
- return -ENOTEMPTY;
-
- ret = filemap_write_and_wait_range(i.src_inode->v.i_mapping,
+ if (mode == BCH_RENAME_OVERWRITE) {
+ ret = filemap_write_and_wait_range(src_inode->v.i_mapping,
0, LLONG_MAX);
if (ret)
return ret;
}
- bch2_trans_init(&trans, c, 8, 2048);
+ trans = bch2_trans_get(c);
bch2_lock_inodes(INODE_UPDATE_LOCK,
- i.src_dir,
- i.dst_dir,
- i.src_inode,
- i.dst_inode);
-
- if (S_ISDIR(i.src_inode->v.i_mode) &&
- inode_attrs_changing(i.dst_dir, i.src_inode)) {
- ret = -EXDEV;
- goto err;
- }
+ src_dir,
+ dst_dir,
+ src_inode,
+ dst_inode);
- if (i.mode == BCH_RENAME_EXCHANGE &&
- S_ISDIR(i.dst_inode->v.i_mode) &&
- inode_attrs_changing(i.src_dir, i.dst_inode)) {
- ret = -EXDEV;
+ 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(i.dst_dir, i.src_inode, Inode_opt_project)) {
- ret = bch2_fs_quota_transfer(c, i.src_inode,
- i.dst_dir->ei_qid,
+ 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 (i.mode == BCH_RENAME_EXCHANGE &&
- inode_attr_changing(i.src_dir, i.dst_inode, Inode_opt_project)) {
- ret = bch2_fs_quota_transfer(c, i.dst_inode,
- i.src_dir->ei_qid,
+ 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;
}
-retry:
- bch2_trans_begin(&trans);
- i.now = bch2_current_time(c);
-
- ret = bch2_dirent_rename(&trans,
- i.src_dir, &src_dentry->d_name,
- i.dst_dir, &dst_dentry->d_name,
- i.mode) ?:
- bch2_write_inode_trans(&trans, i.src_dir, &src_dir_u,
- inode_update_for_rename_fn, &i) ?:
- (i.src_dir != i.dst_dir
- ? bch2_write_inode_trans(&trans, i.dst_dir, &dst_dir_u,
- inode_update_for_rename_fn, &i)
- : 0 ) ?:
- bch2_write_inode_trans(&trans, i.src_inode, &src_inode_u,
- inode_update_for_rename_fn, &i) ?:
- (i.dst_inode
- ? bch2_write_inode_trans(&trans, i.dst_inode, &dst_inode_u,
- inode_update_for_rename_fn, &i)
- : 0 ) ?:
- bch2_trans_commit(&trans, NULL,
- &journal_seq,
- BTREE_INSERT_ATOMIC|
- BTREE_INSERT_NOUNLOCK);
- if (ret == -EINTR)
- goto retry;
+ 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))
goto err;
- bch2_inode_update_after_write(c, i.src_dir, &src_dir_u,
+ 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);
+
+ bch2_inode_update_after_write(trans, src_dir, &src_dir_u,
ATTR_MTIME|ATTR_CTIME);
- journal_seq_copy(i.src_dir, journal_seq);
- if (i.src_dir != i.dst_dir) {
- bch2_inode_update_after_write(c, i.dst_dir, &dst_dir_u,
+ if (src_dir != dst_dir)
+ bch2_inode_update_after_write(trans, dst_dir, &dst_dir_u,
ATTR_MTIME|ATTR_CTIME);
- journal_seq_copy(i.dst_dir, journal_seq);
- }
- journal_seq_copy(i.src_inode, journal_seq);
- if (i.dst_inode)
- journal_seq_copy(i.dst_inode, journal_seq);
-
- bch2_inode_update_after_write(c, i.src_inode, &src_inode_u,
+ bch2_inode_update_after_write(trans, src_inode, &src_inode_u,
ATTR_CTIME);
- if (i.dst_inode)
- bch2_inode_update_after_write(c, i.dst_inode, &dst_inode_u,
+
+ if (dst_inode)
+ bch2_inode_update_after_write(trans, dst_inode, &dst_inode_u,
ATTR_CTIME);
err:
- bch2_trans_exit(&trans);
+ bch2_trans_put(trans);
- bch2_fs_quota_transfer(c, i.src_inode,
- bch_qid(&i.src_inode->ei_inode),
+ bch2_fs_quota_transfer(c, src_inode,
+ bch_qid(&src_inode->ei_inode),
1 << QTYP_PRJ,
KEY_TYPE_QUOTA_NOCHECK);
- if (i.dst_inode)
- bch2_fs_quota_transfer(c, i.dst_inode,
- bch_qid(&i.dst_inode->ei_inode),
+ 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,
- i.src_dir,
- i.dst_dir,
- i.src_inode,
- i.dst_inode);
+ src_dir,
+ dst_dir,
+ src_inode,
+ dst_inode);
return ret;
}
-static int inode_update_for_setattr_fn(struct bch_inode_info *inode,
- struct bch_inode_unpacked *bi,
- void *p)
+static void bch2_setattr_copy(struct mnt_idmap *idmap,
+ struct bch_inode_info *inode,
+ struct bch_inode_unpacked *bi,
+ struct iattr *attr)
{
struct bch_fs *c = inode->v.i_sb->s_fs_info;
- struct iattr *attr = p;
unsigned int ia_valid = attr->ia_valid;
if (ia_valid & ATTR_UID)
- bi->bi_uid = from_kuid(inode->v.i_sb->s_user_ns, attr->ia_uid);
+ bi->bi_uid = from_kuid(i_user_ns(&inode->v), attr->ia_uid);
if (ia_valid & ATTR_GID)
- bi->bi_gid = from_kgid(inode->v.i_sb->s_user_ns, attr->ia_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);
: inode->v.i_gid;
if (!in_group_p(gid) &&
- !capable_wrt_inode_uidgid(&inode->v, CAP_FSETID))
+ !capable_wrt_inode_uidgid(idmap, &inode->v, CAP_FSETID))
mode &= ~S_ISGID;
bi->bi_mode = mode;
}
-
- return 0;
}
-static int bch2_setattr_nonsize(struct bch_inode_info *inode, struct iattr *iattr)
+int bch2_setattr_nonsize(struct mnt_idmap *idmap,
+ struct bch_inode_info *inode,
+ struct iattr *attr)
{
struct bch_fs *c = inode->v.i_sb->s_fs_info;
struct bch_qid qid;
- struct btree_trans trans;
+ struct btree_trans *trans;
+ struct btree_iter inode_iter = { NULL };
struct bch_inode_unpacked inode_u;
struct posix_acl *acl = NULL;
int ret;
qid = inode->ei_qid;
- if (iattr->ia_valid & ATTR_UID)
- qid.q[QTYP_USR] = from_kuid(&init_user_ns, iattr->ia_uid);
+ if (attr->ia_valid & ATTR_UID)
+ qid.q[QTYP_USR] = from_kuid(i_user_ns(&inode->v), attr->ia_uid);
- if (iattr->ia_valid & ATTR_GID)
- qid.q[QTYP_GRP] = from_kgid(&init_user_ns, iattr->ia_gid);
+ if (attr->ia_valid & ATTR_GID)
+ qid.q[QTYP_GRP] = from_kgid(i_user_ns(&inode->v), attr->ia_gid);
ret = bch2_fs_quota_transfer(c, inode, qid, ~0,
KEY_TYPE_QUOTA_PREALLOC);
if (ret)
goto err;
- bch2_trans_init(&trans, c, 0, 0);
+ trans = bch2_trans_get(c);
retry:
- bch2_trans_begin(&trans);
+ bch2_trans_begin(trans);
kfree(acl);
acl = NULL;
- ret = bch2_write_inode_trans(&trans, inode, &inode_u,
- inode_update_for_setattr_fn, iattr) ?:
- (iattr->ia_valid & ATTR_MODE
- ? bch2_acl_chmod(&trans, inode, iattr->ia_mode, &acl)
- : 0) ?:
- bch2_trans_commit(&trans, NULL,
- &inode->ei_journal_seq,
- BTREE_INSERT_ATOMIC|
- BTREE_INSERT_NOUNLOCK|
- BTREE_INSERT_NOFAIL);
- if (ret == -EINTR)
+ ret = bch2_inode_peek(trans, &inode_iter, &inode_u, inode_inum(inode),
+ BTREE_ITER_INTENT);
+ if (ret)
+ goto btree_err;
+
+ bch2_setattr_copy(idmap, inode, &inode_u, attr);
+
+ 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;
+ }
+
+ 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);
+
+ if (bch2_err_matches(ret, BCH_ERR_transaction_restart))
goto retry;
if (unlikely(ret))
goto err_trans;
- bch2_inode_update_after_write(c, inode, &inode_u, iattr->ia_valid);
+ bch2_inode_update_after_write(trans, inode, &inode_u, attr->ia_valid);
if (acl)
set_cached_acl(&inode->v, ACL_TYPE_ACCESS, acl);
err_trans:
- bch2_trans_exit(&trans);
+ bch2_trans_put(trans);
err:
mutex_unlock(&inode->ei_update_lock);
- return ret;
+ return bch2_err_class(ret);
}
-static int bch2_getattr(const struct path *path, struct kstat *stat,
+static int bch2_getattr(struct mnt_idmap *idmap,
+ const struct path *path, struct kstat *stat,
u32 request_mask, unsigned query_flags)
{
struct bch_inode_info *inode = to_bch_ei(d_inode(path->dentry));
stat->gid = inode->v.i_gid;
stat->rdev = inode->v.i_rdev;
stat->size = i_size_read(&inode->v);
- stat->atime = inode->v.i_atime;
- stat->mtime = inode->v.i_mtime;
- stat->ctime = inode->v.i_ctime;
+ 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;
stat->btime = bch2_time_to_timespec(c, inode->ei_inode.bi_otime);
}
- if (inode->ei_inode.bi_flags & BCH_INODE_IMMUTABLE)
+ if (inode->ei_inode.bi_flags & BCH_INODE_immutable)
stat->attributes |= STATX_ATTR_IMMUTABLE;
- if (inode->ei_inode.bi_flags & BCH_INODE_APPEND)
+ stat->attributes_mask |= STATX_ATTR_IMMUTABLE;
+
+ if (inode->ei_inode.bi_flags & BCH_INODE_append)
stat->attributes |= STATX_ATTR_APPEND;
- if (inode->ei_inode.bi_flags & BCH_INODE_NODUMP)
+ 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 bch_inode_info *inode = to_bch_ei(dentry->d_inode);
+ struct bch_fs *c = inode->v.i_sb->s_fs_info;
int ret;
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;
return iattr->ia_valid & ATTR_SIZE
- ? bch2_truncate(inode, iattr)
- : bch2_setattr_nonsize(inode, iattr);
+ ? bchfs_truncate(idmap, inode, iattr)
+ : bch2_setattr_nonsize(idmap, inode, iattr);
}
-static int bch2_tmpfile(struct inode *vdir, 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_inode_info *inode =
- __bch2_create(to_bch_ei(vdir), dentry, mode, 0, true);
+ __bch2_create(idmap, to_bch_ei(vdir),
+ file->f_path.dentry, mode, 0,
+ (subvol_inum) { 0 }, BCH_CREATE_TMPFILE);
if (IS_ERR(inode))
- return PTR_ERR(inode);
+ return bch2_err_class(PTR_ERR(inode));
- d_mark_tmpfile(dentry, &inode->v);
- d_instantiate(dentry, &inode->v);
- 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 bch_fs *c,
struct fiemap_extent_info *info,
struct bkey_s_c k, unsigned flags)
{
- if (bkey_extent_is_data(k.k)) {
+ 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 flags2 = 0;
u64 offset = p.ptr.offset;
+ if (p.ptr.unwritten)
+ flags2 |= FIEMAP_EXTENT_UNWRITTEN;
+
if (p.crc.compression_type)
flags2 |= FIEMAP_EXTENT_ENCODED;
else
offset += p.crc.offset;
- if ((offset & (c->opts.block_size - 1)) ||
- (k.k->size & (c->opts.block_size - 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,
}
return 0;
+ } 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,
{
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 btree_trans *trans;
+ struct btree_iter iter;
struct bkey_s_c k;
- BKEY_PADDED(k) cur, prev;
+ 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;
- bch2_trans_init(&trans, c, 0, 0);
+ start >>= 9;
- iter = bch2_trans_get_iter(&trans, BTREE_ID_EXTENTS,
- POS(ei->v.i_ino, start >> 9), 0);
+ bch2_bkey_buf_init(&cur);
+ bch2_bkey_buf_init(&prev);
+ trans = bch2_trans_get(c);
retry:
- while ((k = bch2_btree_iter_peek(iter)).k &&
- !(ret = bkey_err(k)) &&
- bkey_cmp(iter->pos, end) < 0) {
+ 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;
+
if (!bkey_extent_is_data(k.k) &&
k.k->type != KEY_TYPE_reservation) {
- bch2_btree_iter_next(iter);
+ bch2_btree_iter_advance(&iter);
continue;
}
- bkey_reassemble(&cur.k, k);
- k = bkey_i_to_s_c(&cur.k);
-
- offset_into_extent = iter->pos.offset -
+ offset_into_extent = iter.pos.offset -
bkey_start_offset(k.k);
sectors = k.k->size - offset_into_extent;
- ret = bch2_read_indirect_extent(&trans,
- &offset_into_extent, &cur.k);
+ 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);
- if (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;
+ 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);
+ bkey_i_to_s_c(prev.k), 0);
if (ret)
break;
}
- bkey_copy(&prev.k, &cur.k);
+ bkey_copy(prev.k, cur.k);
have_extent = true;
- if (k.k->type == KEY_TYPE_reflink_v)
- bch2_btree_iter_set_pos(iter, k.k->p);
- else
- bch2_btree_iter_next(iter);
+ bch2_btree_iter_set_pos(&iter,
+ POS(iter.pos.inode, iter.pos.offset + sectors));
}
-
- if (ret == -EINTR)
+ 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)
- ret = bch2_fill_extent(c, info, bkey_i_to_s_c(&prev.k),
+ if (!ret && have_extent) {
+ bch2_trans_unlock(trans);
+ ret = bch2_fill_extent(c, info, bkey_i_to_s_c(prev.k),
FIEMAP_EXTENT_LAST);
+ }
- ret = bch2_trans_exit(&trans) ?: ret;
+ 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,
};
static int bch2_vfs_readdir(struct file *file, struct dir_context *ctx)
{
- struct bch_fs *c = file_inode(file)->i_sb->s_fs_info;
+ struct bch_inode_info *inode = file_bch_inode(file);
+ struct bch_fs *c = inode->v.i_sb->s_fs_info;
+
+ if (!dir_emit_dots(file, ctx))
+ return 0;
- return bch2_readdir(c, file, ctx);
+ int ret = bch2_readdir(c, inode_inum(inode), ctx);
+
+ bch_err_fn(c, ret);
+ return bch2_err_class(ret);
+}
+
+static int bch2_open(struct inode *vinode, struct file *file)
+{
+ 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;
+
+ int ret = bch2_subvol_is_ro(c, inode->ei_subvol);
+ if (ret)
+ return ret;
+ }
+
+ return generic_file_open(vinode, file);
}
static const struct file_operations bch_file_operations = {
+ .open = bch2_open,
.llseek = bch2_llseek,
- .read_iter = generic_file_read_iter,
+ .read_iter = bch2_read_iter,
.write_iter = bch2_write_iter,
.mmap = bch2_mmap,
- .open = generic_file_open,
.fsync = bch2_fsync,
- .splice_read = generic_file_splice_read,
+ .splice_read = filemap_splice_read,
.splice_write = iter_file_splice_write,
.fallocate = bch2_fallocate_dispatch,
.unlocked_ioctl = bch2_fs_file_ioctl,
.unlink = bch2_unlink,
.symlink = bch2_symlink,
.mkdir = bch2_mkdir,
- .rmdir = bch2_rmdir,
+ .rmdir = bch2_unlink,
.mknod = bch2_mknod,
.rename = bch2_rename2,
.getattr = bch2_getattr,
static const struct file_operations bch_dir_file_operations = {
.llseek = bch2_dir_llseek,
.read = generic_read_dir,
- .iterate = bch2_vfs_readdir,
+ .iterate_shared = bch2_vfs_readdir,
.fsync = bch2_fsync,
.unlocked_ioctl = bch2_fs_file_ioctl,
#ifdef CONFIG_COMPAT
};
static const struct address_space_operations bch_address_space_operations = {
- .writepage = bch2_writepage,
- .readpage = bch2_readpage,
+ .read_folio = bch2_read_folio,
.writepages = bch2_writepages,
- .readpages = bch2_readpages,
- .set_page_dirty = __set_page_dirty_nobuffers,
+ .readahead = bch2_readahead,
+ .dirty_folio = filemap_dirty_folio,
.write_begin = bch2_write_begin,
.write_end = bch2_write_end,
- .invalidatepage = bch2_invalidatepage,
- .releasepage = bch2_releasepage,
- .direct_IO = bch2_direct_IO,
+ .invalidate_folio = bch2_invalidate_folio,
+ .release_folio = bch2_release_folio,
+ .direct_IO = noop_direct_IO,
#ifdef CONFIG_MIGRATION
- .migratepage = bch2_migrate_page,
+ .migrate_folio = filemap_migrate_folio,
#endif
- .error_remove_page = generic_error_remove_page,
+ .error_remove_folio = generic_error_remove_folio,
};
-static struct inode *bch2_nfs_get_inode(struct super_block *sb,
- u64 ino, u32 generation)
+struct bcachefs_fid {
+ u64 inum;
+ u32 subvol;
+ u32 gen;
+} __packed;
+
+struct bcachefs_fid_with_parent {
+ struct bcachefs_fid fid;
+ struct bcachefs_fid dir;
+} __packed;
+
+static int bcachefs_fid_valid(int fh_len, int fh_type)
{
- struct bch_fs *c = sb->s_fs_info;
- struct inode *vinode;
+ 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;
+ }
+}
+
+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,
+ };
+}
+
+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 (ino < BCACHEFS_ROOT_INO)
- return ERR_PTR(-ESTALE);
+ if (!S_ISDIR(inode->v.i_mode) && dir) {
+ struct bcachefs_fid_with_parent *fid = (void *) fh;
- vinode = bch2_vfs_inode_get(c, ino);
- if (IS_ERR(vinode))
- return ERR_CAST(vinode);
- if (generation && vinode->i_generation != generation) {
- /* we didn't find the right inode.. */
+ min_len = sizeof(*fid) / sizeof(u32);
+ if (*len < min_len) {
+ *len = min_len;
+ return FILEID_INVALID;
+ }
+
+ fid->fid = bch2_inode_to_fid(inode);
+ fid->dir = bch2_inode_to_fid(dir);
+
+ *len = min_len;
+ return FILEID_BCACHEFS_WITH_PARENT;
+ } else {
+ struct bcachefs_fid *fid = (void *) fh;
+
+ min_len = sizeof(*fid) / sizeof(u32);
+ if (*len < min_len) {
+ *len = min_len;
+ return FILEID_INVALID;
+ }
+ *fid = bch2_inode_to_fid(inode);
+
+ *len = min_len;
+ return FILEID_BCACHEFS_WITHOUT_PARENT;
+ }
+}
+
+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);
- return ERR_PTR(-ESTALE);
+ vinode = ERR_PTR(-ESTALE);
}
return vinode;
}
-static struct dentry *bch2_fh_to_dentry(struct super_block *sb, struct fid *fid,
+static struct dentry *bch2_fh_to_dentry(struct super_block *sb, struct fid *_fid,
int fh_len, int fh_type)
{
- return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
- bch2_nfs_get_inode);
+ struct bcachefs_fid *fid = (void *) _fid;
+
+ if (!bcachefs_fid_valid(fh_len, fh_type))
+ return NULL;
+
+ return d_obtain_alias(bch2_nfs_get_inode(sb, *fid));
}
-static struct dentry *bch2_fh_to_parent(struct super_block *sb, struct fid *fid,
+static struct dentry *bch2_fh_to_parent(struct super_block *sb, struct fid *_fid,
int fh_len, int fh_type)
{
- return generic_fh_to_parent(sb, fid, fh_len, fh_type,
- bch2_nfs_get_inode);
+ struct bcachefs_fid_with_parent *fid = (void *) _fid;
+
+ if (!bcachefs_fid_valid(fh_len, fh_type) ||
+ fh_type != FILEID_BCACHEFS_WITH_PARENT)
+ return NULL;
+
+ return d_obtain_alias(bch2_nfs_get_inode(sb, fid->dir));
+}
+
+static struct dentry *bch2_get_parent(struct dentry *child)
+{
+ 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_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;
+
+ if (k.k->type != KEY_TYPE_dirent) {
+ ret = -BCH_ERR_ENOENT_dirent_doesnt_match_inode;
+ goto err;
+ }
+
+ 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;
+
+ 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;
+
+ if (k.k->type != KEY_TYPE_dirent)
+ continue;
+
+ 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;
+
+ if (target.subvol == inode->ei_subvol &&
+ target.inum == inode->ei_inode.bi_inum)
+ goto found;
+ }
+ }
+
+ ret = -ENOENT;
+ goto err;
+found:
+ dirent_name = bch2_dirent_get_name(d);
+
+ 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;
+
+ bch2_trans_iter_exit(trans, &iter1);
+ bch2_trans_iter_exit(trans, &iter2);
+ bch2_trans_put(trans);
+
+ return ret;
}
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_parent = bch2_get_parent,
+ .get_name = bch2_get_name,
};
-static void bch2_vfs_inode_init(struct bch_fs *c,
+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_inode_unpacked *bi,
+ struct bch_subvolume *subvol)
{
- bch2_inode_update_after_write(c, inode, bi, ~0);
+ bch2_inode_update_after_write(trans, inode, bi, ~0);
+
+ if (BCH_SUBVOLUME_SNAP(subvol))
+ set_bit(EI_INODE_SNAPSHOT, &inode->ei_flags);
+ else
+ clear_bit(EI_INODE_SNAPSHOT, &inode->ei_flags);
inode->v.i_blocks = bi->bi_sectors;
inode->v.i_ino = bi->bi_inum;
inode->v.i_generation = bi->bi_generation;
inode->v.i_size = bi->bi_size;
- inode->ei_journal_seq = 0;
+ inode->ei_flags = 0;
inode->ei_quota_reserved = 0;
- inode->ei_str_hash = bch2_hash_info_init(c, bi);
inode->ei_qid = bch_qid(bi);
+ inode->ei_subvol = inum.subvol;
inode->v.i_mapping->a_ops = &bch_address_space_operations;
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)
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);
- inode->ei_journal_seq = 0;
return &inode->v;
}
call_rcu(&vinode->i_rcu, bch2_i_callback);
}
-static int inode_update_times_fn(struct bch_inode_info *inode,
+static int inode_update_times_fn(struct btree_trans *trans,
+ struct bch_inode_info *inode,
struct bch_inode_unpacked *bi,
void *p)
{
struct bch_fs *c = inode->v.i_sb->s_fs_info;
- bi->bi_atime = timespec_to_bch2_time(c, inode->v.i_atime);
- bi->bi_mtime = timespec_to_bch2_time(c, inode->v.i_mtime);
- bi->bi_ctime = timespec_to_bch2_time(c, inode->v.i_ctime);
+ 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;
}
ATTR_ATIME|ATTR_MTIME|ATTR_CTIME);
mutex_unlock(&inode->ei_update_lock);
- return ret;
+ return bch2_err_class(ret);
}
static void bch2_evict_inode(struct inode *vinode)
KEY_TYPE_QUOTA_WARN);
bch2_quota_acct(c, inode->ei_qid, Q_INO, -1,
KEY_TYPE_QUOTA_WARN);
- bch2_inode_rm(c, inode->v.i_ino);
+ 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);
+}
+
+void bch2_evict_subvolume_inodes(struct bch_fs *c, snapshot_id_list *s)
+{
+ 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;
+
+ 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);
+
+ prepare_to_wait(wq, &wait.wq_entry, TASK_UNINTERRUPTIBLE);
+ mutex_unlock(&c->vfs_inodes_lock);
+
+ schedule();
+ finish_wait(wq, &wait.wq_entry);
+ goto again;
+ }
+ }
+ mutex_unlock(&c->vfs_inodes_lock);
+
+ darray_for_each(grabbed, i) {
+ inode = *i;
+ d_mark_dontcache(&inode->v);
+ d_prune_aliases(&inode->v);
+ iput(&inode->v);
}
+ grabbed.nr = 0;
+
+ 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 bch_fs *c = sb->s_fs_info;
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);
u64 fsid;
buf->f_type = BCACHEFS_STATFS_MAGIC;
buf->f_bsize = sb->s_blocksize;
buf->f_blocks = usage.capacity >> shift;
- buf->f_bfree = (usage.capacity - usage.used) >> shift;
- buf->f_bavail = buf->f_bfree;
- buf->f_files = usage.nr_inodes;
- buf->f_ffree = U64_MAX;
+ 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;
fsid = le64_to_cpup((void *) c->sb.user_uuid.b) ^
le64_to_cpup((void *) c->sb.user_uuid.b + sizeof(u64));
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;
return 0;
}
- return bch2_journal_flush(&c->journal);
+ ret = bch2_journal_flush(&c->journal);
+ return bch2_err_class(ret);
}
-static struct bch_fs *bch2_path_to_fs(const char *dev)
+static struct bch_fs *bch2_path_to_fs(const char *path)
{
struct bch_fs *c;
- struct block_device *bdev = lookup_bdev(dev);
-
- if (IS_ERR(bdev))
- return ERR_CAST(bdev);
-
- c = bch2_bdev_to_fs(bdev);
- bdput(bdev);
- return c ?: ERR_PTR(-ENOENT);
-}
-
-static struct bch_fs *__bch2_open_as_blockdevs(const char *dev_name, char * const *devs,
- unsigned nr_devs, struct bch_opts opts)
-{
- struct bch_fs *c, *c1, *c2;
- size_t i;
-
- if (!nr_devs)
- return ERR_PTR(-EINVAL);
-
- c = bch2_fs_open(devs, nr_devs, opts);
-
- if (IS_ERR(c) && PTR_ERR(c) == -EBUSY) {
- /*
- * Already open?
- * Look up each block device, make sure they all belong to a
- * filesystem and they all belong to the _same_ filesystem
- */
-
- c1 = bch2_path_to_fs(devs[0]);
- if (IS_ERR(c1))
- return c;
-
- for (i = 1; i < nr_devs; i++) {
- c2 = bch2_path_to_fs(devs[i]);
- if (!IS_ERR(c2))
- closure_put(&c2->cl);
-
- if (c1 != c2) {
- closure_put(&c1->cl);
- return c;
- }
- }
-
- c = c1;
- }
-
- if (IS_ERR(c))
- return c;
+ dev_t dev;
+ int ret;
- mutex_lock(&c->state_lock);
+ ret = lookup_bdev(path, &dev);
+ if (ret)
+ return ERR_PTR(ret);
- if (!test_bit(BCH_FS_STARTED, &c->flags)) {
- mutex_unlock(&c->state_lock);
+ c = bch2_dev_to_fs(dev);
+ if (c)
closure_put(&c->cl);
- pr_err("err mounting %s: incomplete filesystem", dev_name);
- return ERR_PTR(-EINVAL);
- }
-
- mutex_unlock(&c->state_lock);
-
- set_bit(BCH_FS_BDEV_MOUNTED, &c->flags);
- return c;
-}
-
-static struct bch_fs *bch2_open_as_blockdevs(const char *_dev_name,
- struct bch_opts opts)
-{
- char *dev_name = NULL, **devs = NULL, *s;
- struct bch_fs *c = ERR_PTR(-ENOMEM);
- size_t i, nr_devs = 0;
-
- dev_name = kstrdup(_dev_name, GFP_KERNEL);
- if (!dev_name)
- goto err;
-
- for (s = dev_name; s; s = strchr(s + 1, ':'))
- nr_devs++;
-
- devs = kcalloc(nr_devs, sizeof(const char *), GFP_KERNEL);
- if (!devs)
- goto err;
-
- for (i = 0, s = dev_name;
- s;
- (s = strchr(s, ':')) && (*s++ = '\0'))
- devs[i++] = s;
-
- c = __bch2_open_as_blockdevs(_dev_name, devs, nr_devs, opts);
-err:
- kfree(devs);
- kfree(dev_name);
- return c;
+ return c ?: ERR_PTR(-ENOENT);
}
static int bch2_remount(struct super_block *sb, int *flags, char *data)
struct bch_opts opts = bch2_opts_empty();
int ret;
- opt_set(opts, read_only, (*flags & SB_RDONLY) != 0);
-
- ret = bch2_parse_mount_opts(&opts, data);
+ ret = bch2_parse_mount_opts(c, &opts, data);
if (ret)
- return ret;
+ goto err;
+
+ opt_set(opts, read_only, (*flags & SB_RDONLY) != 0);
if (opts.read_only != c->opts.read_only) {
- mutex_lock(&c->state_lock);
+ down_write(&c->state_lock);
if (opts.read_only) {
bch2_fs_read_only(c);
ret = bch2_fs_read_write(c);
if (ret) {
bch_err(c, "error going rw: %i", ret);
- mutex_unlock(&c->state_lock);
- return -EINVAL;
+ up_write(&c->state_lock);
+ ret = -EINVAL;
+ goto err;
}
sb->s_flags &= ~SB_RDONLY;
c->opts.read_only = opts.read_only;
- mutex_unlock(&c->state_lock);
+ up_write(&c->state_lock);
}
- if (opts.errors >= 0)
+ if (opt_defined(opts, errors))
c->opts.errors = opts.errors;
+err:
+ return bch2_err_class(ret);
+}
- return ret;
+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_show_options(struct seq_file *seq, struct dentry *root)
{
struct bch_fs *c = root->d_sb->s_fs_info;
enum bch_opt_id i;
- char buf[512];
+ struct printbuf buf = PRINTBUF;
+ int ret = 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);
- if (!(opt->mode & OPT_MOUNT))
+ if (!(opt->flags & OPT_MOUNT))
continue;
if (v == bch2_opt_get_by_id(&bch2_opts_default, i))
continue;
- bch2_opt_to_text(&PBUF(buf), c, opt, v,
+ 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);
+ seq_puts(seq, buf.buf);
}
+ if (buf.allocation_failure)
+ ret = -ENOMEM;
+ printbuf_exit(&buf);
+ return ret;
+}
+
+static void bch2_put_super(struct super_block *sb)
+{
+ struct bch_fs *c = sb->s_fs_info;
+
+ __bch2_fs_stop(c);
+}
+
+/*
+ * 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;
}
static const struct super_operations bch_super_operations = {
.evict_inode = bch2_evict_inode,
.sync_fs = bch2_sync_fs,
.statfs = bch2_statfs,
+ .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 *vinode;
struct bch_opts opts = bch2_opts_empty();
- unsigned i;
int ret;
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);
+
+ 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);
- c = bch2_open_as_blockdevs(dev_name, opts);
- if (IS_ERR(c))
- return ERR_CAST(c);
+ 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|SB_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) & SB_RDONLY) {
ret = -EBUSY;
goto err_put_super;
#endif
sb->s_xattr = bch2_xattr_handlers;
sb->s_magic = BCACHEFS_STATFS_MAGIC;
- sb->s_time_gran = c->sb.time_precision;
+ 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);
c->vfs_sb = sb;
- 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;
- sb->s_bdi->congested_fn = bch2_congested;
- sb->s_bdi->congested_data = c;
sb->s_bdi->ra_pages = VM_READAHEAD_PAGES;
- for_each_online_member(ca, c, i) {
+ for_each_online_member(c, ca) {
struct block_device *bdev = ca->disk_sb.bdev;
/* XXX: create an anonymous device for multi device filesystems */
break;
}
+ c->dev = sb->s_dev;
+
#ifdef CONFIG_BCACHEFS_POSIX_ACL
if (c->opts.acl)
sb->s_flags |= SB_POSIXACL;
#endif
- vinode = bch2_vfs_inode_get(c, BCACHEFS_ROOT_INO);
- if (IS_ERR(vinode)) {
- bch_err(c, "error mounting: error getting root inode %i",
- (int) PTR_ERR(vinode));
- ret = PTR_ERR(vinode);
+ 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(vinode);
if (!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_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;
projects / bcachefs-tools-debian / blobdiff