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Diffstat (limited to 'fs/bcachefs/fs.c')
-rw-r--r--fs/bcachefs/fs.c160
1 files changed, 83 insertions, 77 deletions
diff --git a/fs/bcachefs/fs.c b/fs/bcachefs/fs.c
index 4d51be813509..ec419b8e2c43 100644
--- a/fs/bcachefs/fs.c
+++ b/fs/bcachefs/fs.c
@@ -93,7 +93,7 @@ retry:
BTREE_ITER_INTENT) ?:
(set ? set(trans, inode, &inode_u, p) : 0) ?:
bch2_inode_write(trans, &iter, &inode_u) ?:
- bch2_trans_commit(trans, NULL, NULL, BTREE_INSERT_NOFAIL);
+ bch2_trans_commit(trans, NULL, NULL, BCH_TRANS_COMMIT_no_enospc);
/*
* the btree node lock protects inode->ei_inode, not ei_update_lock;
@@ -258,7 +258,8 @@ __bch2_create(struct mnt_idmap *idmap,
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,
@@ -430,7 +431,9 @@ static int bch2_link(struct dentry *old_dentry, struct inode *vdir,
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;
@@ -452,7 +455,7 @@ int __bch2_unlink(struct inode *vdir, struct dentry *dentry,
bch2_lock_inodes(INODE_UPDATE_LOCK, dir, inode);
ret = commit_do(trans, NULL, NULL,
- BTREE_INSERT_NOFAIL,
+ BCH_TRANS_COMMIT_no_enospc,
bch2_unlink_trans(trans,
inode_inum(dir), &dir_u,
&inode_u, &dentry->d_name,
@@ -481,7 +484,11 @@ err:
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;
+
+ return bch2_subvol_is_ro(c, dir->ei_subvol) ?:
+ __bch2_unlink(vdir, dentry, false);
}
static int bch2_symlink(struct mnt_idmap *idmap,
@@ -562,6 +569,11 @@ static int bch2_rename2(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,
@@ -717,7 +729,7 @@ retry:
ret = bch2_inode_write(trans, &inode_iter, &inode_u) ?:
bch2_trans_commit(trans, NULL, NULL,
- BTREE_INSERT_NOFAIL);
+ BCH_TRANS_COMMIT_no_enospc);
btree_err:
bch2_trans_iter_exit(trans, &inode_iter);
@@ -783,11 +795,13 @@ 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(idmap, dentry, iattr);
+ ret = bch2_subvol_is_ro(c, inode->ei_subvol) ?:
+ setattr_prepare(idmap, dentry, iattr);
if (ret)
return ret;
@@ -998,24 +1012,36 @@ static int bch2_vfs_readdir(struct file *file, struct dir_context *ctx)
{
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,
@@ -1103,7 +1129,7 @@ static const struct address_space_operations bch_address_space_operations = {
#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 {
@@ -1143,24 +1169,33 @@ static int bch2_encode_fh(struct inode *vinode, u32 *fh, int *len,
{
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;
}
}
@@ -1463,7 +1498,7 @@ static void bch2_evict_inode(struct inode *vinode)
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;
@@ -1589,43 +1624,18 @@ static struct bch_fs *bch2_path_to_fs(const char *path)
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);
@@ -1659,11 +1669,9 @@ err:
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;
@@ -1733,6 +1741,9 @@ 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);
@@ -1765,17 +1776,18 @@ 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;
- 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;
}
@@ -1784,13 +1796,9 @@ 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();
- char **devs;
- struct bch_fs **devs_to_fs = NULL;
- unsigned i, nr_devs;
int ret;
opt_set(opts, read_only, (flags & SB_RDONLY) != 0);
@@ -1802,25 +1810,25 @@ static struct dentry *bch2_mount(struct file_system_type *fs_type,
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;
@@ -1840,9 +1848,8 @@ static struct dentry *bch2_mount(struct file_system_type *fs_type,
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);
@@ -1883,7 +1890,7 @@ got_sb:
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 */
@@ -1904,10 +1911,9 @@ got_sb:
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) {
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