return jhash_3words(inum.subvol, inum.inum >> 32, inum.inum, JHASH_INITVAL);
}
-struct inode *bch2_vfs_inode_get(struct bch_fs *c, subvol_inum inum)
+static struct bch_inode_info *bch2_inode_insert(struct bch_fs *c, struct bch_inode_info *inode)
{
- struct bch_inode_unpacked inode_u;
- struct bch_inode_info *inode;
- struct btree_trans *trans;
- struct bch_subvolume subvol;
- int ret;
+ 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);
- 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;
+ 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);
+ }
- 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));
+ return inode;
+}
- if (!ret)
- bch2_vfs_inode_init(trans, inum, inode, &inode_u, &subvol);
- bch2_trans_put(trans);
+#define memalloc_flags_do(_flags, _do) \
+({ \
+ unsigned _saved_flags = memalloc_flags_save(_flags); \
+ typeof(_do) _ret = _do; \
+ memalloc_noreclaim_restore(_saved_flags); \
+ _ret; \
+})
- if (ret) {
- iget_failed(&inode->v);
- return ERR_PTR(bch2_err_class(ret));
+/*
+ * 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;
+
+ struct bch_inode_info *inode =
+ memalloc_flags_do(PF_MEMALLOC_NORECLAIM|PF_MEMALLOC_NOWARN,
+ to_bch_ei(new_inode(c->vfs_sb)));
+
+ 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);
}
- mutex_lock(&c->vfs_inodes_lock);
- list_add(&inode->ei_vfs_inode_list, &c->vfs_inodes_list);
- mutex_unlock(&c->vfs_inodes_lock);
+ return inode;
+}
- unlock_new_inode(&inode->v);
+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;
- return &inode->v;
+ struct btree_trans *trans = bch2_trans_get(c);
+
+ 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;
}
struct bch_inode_info *
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, *old;
+ struct bch_inode_info *inode;
struct bch_inode_unpacked inode_u;
struct posix_acl *default_acl = NULL, *acl = NULL;
subvol_inum inum;
retry:
bch2_trans_begin(trans);
- ret = bch2_create_trans(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,
mutex_unlock(&dir->ei_update_lock);
}
- 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);
* bch2_trans_exit() and dropping locks, else we could race with another
* thread pulling the inode in and modifying it:
*/
-
- 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:
- */
- 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);
- }
-
+ inode = bch2_inode_insert(c, inode);
bch2_trans_put(trans);
err:
posix_acl_release(default_acl);
/* methods */
+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 = {};
+
+ int ret = bch2_hash_lookup(trans, &dirent_iter, bch2_dirent_hash_desc,
+ dir_hash_info, dir, name, 0);
+ if (ret)
+ return ERR_PTR(ret);
+
+ struct bkey_s_c k = bch2_btree_iter_peek_slot(&dirent_iter);
+ ret = bkey_err(k);
+ if (ret)
+ goto err;
+
+ ret = bch2_dirent_read_target(trans, dir, bkey_s_c_to_dirent(k), &inum);
+ if (ret > 0)
+ ret = -ENOENT;
+ if (ret)
+ goto err;
+
+ 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;
+
+ 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;
+
+ 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;
+}
+
static struct dentry *bch2_lookup(struct inode *vdir, struct dentry *dentry,
unsigned int flags)
{
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;
- subvol_inum inum = { .subvol = 1 };
- int ret;
-
- ret = bch2_dirent_lookup(c, inode_inum(dir), &hash,
- &dentry->d_name, &inum);
- if (!ret)
- vinode = bch2_vfs_inode_get(c, inum);
+ 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(vinode, dentry);
+ return d_splice_alias(&inode->v, dentry);
}
static int bch2_mknod(struct mnt_idmap *idmap,
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 bch2_err_class(ret);
ihold(&inode->v);
d_instantiate(dentry, &inode->v);
static int bch2_unlink(struct inode *vdir, struct dentry *dentry)
{
- return __bch2_unlink(vdir, dentry, false);
+ 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 mnt_idmap *idmap,
return 0;
err:
iput(&inode->v);
- return ret;
+ return bch2_err_class(ret);
}
static int bch2_mkdir(struct mnt_idmap *idmap,
src_inode,
dst_inode);
+ 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,
src_inode,
dst_inode);
- return ret;
+ return bch2_err_class(ret);
}
static void bch2_setattr_copy(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(idmap, dentry, iattr);
+ ret = bch2_subvol_is_ro(c, inode->ei_subvol) ?:
+ setattr_prepare(idmap, dentry, iattr);
if (ret)
return ret;
{
struct bch_inode_info *inode = file_bch_inode(file);
struct bch_fs *c = inode->v.i_sb->s_fs_info;
- int ret;
if (!dir_emit_dots(file, ctx))
return 0;
- ret = bch2_readdir(c, inode_inum(inode), ctx);
- if (ret)
- bch_err_fn(c, ret);
+ 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 = bch2_read_iter,
.write_iter = bch2_write_iter,
.mmap = bch2_mmap,
- .open = generic_file_open,
.fsync = bch2_fsync,
.splice_read = filemap_splice_read,
.splice_write = iter_file_splice_write,
#ifdef CONFIG_MIGRATION
.migrate_folio = filemap_migrate_folio,
#endif
- .error_remove_page = generic_error_remove_page,
+ .error_remove_folio = generic_error_remove_folio,
};
struct bcachefs_fid {
{
struct bch_inode_info *inode = to_bch_ei(vinode);
struct bch_inode_info *dir = to_bch_ei(vdir);
-
- if (*len < sizeof(struct bcachefs_fid_with_parent) / sizeof(u32))
- return FILEID_INVALID;
+ int min_len;
if (!S_ISDIR(inode->v.i_mode) && dir) {
struct bcachefs_fid_with_parent *fid = (void *) fh;
+ 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 = sizeof(*fid) / sizeof(u32);
+ *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 = sizeof(*fid) / sizeof(u32);
+ *len = min_len;
return FILEID_BCACHEFS_WITHOUT_PARENT;
}
}
struct bch_inode_unpacked *bi,
struct bch_subvolume *subvol)
{
+ bch2_iget5_set(&inode->v, &inum);
bch2_inode_update_after_write(trans, inode, bi, ~0);
if (BCH_SUBVOLUME_SNAP(subvol))
void bch2_evict_subvolume_inodes(struct bch_fs *c, snapshot_id_list *s)
{
- struct bch_inode_info *inode, **i;
+ struct bch_inode_info *inode;
DARRAY(struct bch_inode_info *) grabbed;
bool clean_pass = false, this_pass_clean;
* 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_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));
- buf->f_fsid.val[0] = fsid & 0xFFFFFFFFUL;
- buf->f_fsid.val[1] = (fsid >> 32) & 0xFFFFFFFFUL;
+ buf->f_fsid = uuid_to_fsid(c->sb.user_uuid.b);
buf->f_namelen = BCH_NAME_MAX;
return 0;
return c ?: ERR_PTR(-ENOENT);
}
-static char **split_devs(const char *_dev_name, unsigned *nr)
-{
- char *dev_name = NULL, **devs = NULL, *s;
- size_t i = 0, nr_devs = 0;
-
- dev_name = kstrdup(_dev_name, GFP_KERNEL);
- if (!dev_name)
- return NULL;
-
- for (s = dev_name; s; s = strchr(s + 1, ':'))
- nr_devs++;
-
- devs = kcalloc(nr_devs + 1, sizeof(const char *), GFP_KERNEL);
- if (!devs) {
- kfree(dev_name);
- return NULL;
- }
-
- while ((s = strsep(&dev_name, ":")))
- devs[i++] = s;
-
- *nr = nr_devs;
- return devs;
-}
-
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;
- opt_set(opts, read_only, (*flags & SB_RDONLY) != 0);
-
ret = bch2_parse_mount_opts(c, &opts, data);
if (ret)
goto err;
+ opt_set(opts, read_only, (*flags & SB_RDONLY) != 0);
+
if (opts.read_only != c->opts.read_only) {
down_write(&c->state_lock);
static int bch2_show_devname(struct seq_file *seq, struct dentry *root)
{
struct bch_fs *c = root->d_sb->s_fs_info;
- struct bch_dev *ca;
- unsigned i;
bool first = true;
- for_each_online_member(ca, c, i) {
+ for_each_online_member(c, ca) {
if (!first)
seq_putc(seq, ':');
first = false;
- seq_puts(seq, "/dev/");
- seq_puts(seq, ca->name);
+ seq_puts(seq, ca->disk_sb.sb_name);
}
return 0;
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 -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;
- struct bch_fs **devs = data;
- unsigned i;
+ darray_fs *d = data;
if (!c)
return false;
- for (i = 0; devs[i]; i++)
- if (c != devs[i])
+ darray_for_each(*d, i)
+ if (c != *i)
return false;
return true;
}
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();
- char **devs;
- struct bch_fs **devs_to_fs = NULL;
- unsigned i, nr_devs;
int ret;
opt_set(opts, read_only, (flags & SB_RDONLY) != 0);
if (!dev_name || strlen(dev_name) == 0)
return ERR_PTR(-EINVAL);
- devs = split_devs(dev_name, &nr_devs);
- if (!devs)
- return ERR_PTR(-ENOMEM);
+ darray_str devs;
+ ret = bch2_split_devs(dev_name, &devs);
+ if (ret)
+ return ERR_PTR(ret);
- devs_to_fs = kcalloc(nr_devs + 1, sizeof(void *), GFP_KERNEL);
- if (!devs_to_fs) {
- sb = ERR_PTR(-ENOMEM);
- goto got_sb;
+ 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;
+ }
}
- for (i = 0; i < nr_devs; i++)
- devs_to_fs[i] = bch2_path_to_fs(devs[i]);
-
- sb = sget(fs_type, bch2_test_super, bch2_noset_super,
- flags|SB_NOSEC, devs_to_fs);
+ 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, nr_devs, opts);
+ c = bch2_fs_open(devs.data, devs.nr, opts);
if (IS_ERR(c)) {
sb = ERR_CAST(c);
goto got_sb;
if (IS_ERR(sb))
bch2_fs_stop(c);
got_sb:
- kfree(devs_to_fs);
- kfree(devs[0]);
- kfree(devs);
+ darray_exit(&devs_to_fs);
+ bch2_darray_str_exit(&devs);
if (IS_ERR(sb)) {
ret = PTR_ERR(sb);
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;
strscpy(sb->s_id, c->name, sizeof(sb->s_id));
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 */
sb->s_flags |= SB_POSIXACL;
#endif
- sb->s_shrink.seeks = 0;
+ sb->s_shrink->seeks = 0;
vinode = bch2_vfs_inode_get(c, BCACHEFS_ROOT_SUBVOL_INUM);
ret = PTR_ERR_OR_ZERO(vinode);
- if (ret) {
- bch_err_msg(c, ret, "mounting: error getting root inode");
+ 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) {
projects / bcachefs-tools-debian / blobdiff