return bch2_setattr_nonsize(idmap, inode, iattr);
}
-static int bch2_truncate_finish_fn(struct btree_trans *trans,
- struct bch_inode_info *inode,
- struct bch_inode_unpacked *bi,
- void *p)
-{
- bi->bi_flags &= ~BCH_INODE_I_SIZE_DIRTY;
- return 0;
-}
-
-static int bch2_truncate_start_fn(struct btree_trans *trans,
- struct bch_inode_info *inode,
- struct bch_inode_unpacked *bi, void *p)
-{
- u64 *new_i_size = p;
-
- bi->bi_flags |= BCH_INODE_I_SIZE_DIRTY;
- bi->bi_size = *new_i_size;
- return 0;
-}
-
-int bch2_truncate(struct mnt_idmap *idmap,
+int bchfs_truncate(struct mnt_idmap *idmap,
struct bch_inode_info *inode, struct iattr *iattr)
{
struct bch_fs *c = inode->v.i_sb->s_fs_info;
struct address_space *mapping = inode->v.i_mapping;
struct bch_inode_unpacked inode_u;
- u64 new_i_size = iattr->ia_size;
s64 i_sectors_delta = 0;
int ret = 0;
if (unlikely(ret < 0))
goto err;
+ truncate_setsize(&inode->v, iattr->ia_size);
+
/*
* When extending, we're going to write the new i_size to disk
* immediately so we need to flush anything above the current on disk
if (ret)
goto err;
- mutex_lock(&inode->ei_update_lock);
- ret = bch2_write_inode(c, inode, bch2_truncate_start_fn,
- &new_i_size, 0);
- mutex_unlock(&inode->ei_update_lock);
+ ret = bch2_truncate(c, inode_inum(inode), iattr->ia_size, &i_sectors_delta);
+ bch2_i_sectors_acct(c, inode, NULL, i_sectors_delta);
- if (unlikely(ret))
+ if (unlikely(ret)) {
+ /*
+ * If we error here, VFS caches are now inconsistent with btree
+ */
+ set_bit(EI_INODE_ERROR, &inode->ei_flags);
goto err;
-
- truncate_setsize(&inode->v, iattr->ia_size);
-
- ret = bch2_fpunch(c, inode_inum(inode),
- round_up(iattr->ia_size, block_bytes(c)) >> 9,
- U64_MAX, &i_sectors_delta);
- bch2_i_sectors_acct(c, inode, NULL, i_sectors_delta);
+ }
bch2_fs_inconsistent_on(!inode->v.i_size && inode->v.i_blocks &&
!bch2_journal_error(&c->journal), c,
"inode %lu truncated to 0 but i_blocks %llu (ondisk %lli)",
inode->v.i_ino, (u64) inode->v.i_blocks,
inode->ei_inode.bi_sectors);
- if (unlikely(ret))
- goto err;
-
- mutex_lock(&inode->ei_update_lock);
- ret = bch2_write_inode(c, inode, bch2_truncate_finish_fn, NULL, 0);
- mutex_unlock(&inode->ei_update_lock);
ret = bch2_setattr_nonsize(idmap, inode, iattr);
err:
{
struct bch_fs *c = inode->v.i_sb->s_fs_info;
struct address_space *mapping = inode->v.i_mapping;
- struct bkey_buf copy;
- struct btree_trans trans;
- struct btree_iter src, dst, del;
- loff_t shift, new_size;
- u64 src_start;
+ s64 i_sectors_delta = 0;
int ret = 0;
if ((offset | len) & (block_bytes(c) - 1))
return -EINVAL;
if (insert) {
- if (inode->v.i_sb->s_maxbytes - inode->v.i_size < len)
- return -EFBIG;
-
if (offset >= inode->v.i_size)
return -EINVAL;
-
- src_start = U64_MAX;
- shift = len;
} else {
if (offset + len >= inode->v.i_size)
return -EINVAL;
-
- src_start = offset + len;
- shift = -len;
}
- new_size = inode->v.i_size + shift;
-
ret = bch2_write_invalidate_inode_pages_range(mapping, offset, LLONG_MAX);
if (ret)
return ret;
- if (insert) {
- i_size_write(&inode->v, new_size);
- mutex_lock(&inode->ei_update_lock);
- ret = bch2_write_inode_size(c, inode, new_size,
- ATTR_MTIME|ATTR_CTIME);
- mutex_unlock(&inode->ei_update_lock);
- } else {
- s64 i_sectors_delta = 0;
-
- ret = bch2_fpunch(c, inode_inum(inode),
- offset >> 9, (offset + len) >> 9,
- &i_sectors_delta);
- bch2_i_sectors_acct(c, inode, NULL, i_sectors_delta);
+ if (insert)
+ i_size_write(&inode->v, inode->v.i_size + len);
- if (ret)
- return ret;
- }
-
- bch2_bkey_buf_init(©);
- bch2_trans_init(&trans, c, BTREE_ITER_MAX, 1024);
- bch2_trans_iter_init(&trans, &src, BTREE_ID_extents,
- POS(inode->v.i_ino, src_start >> 9),
- BTREE_ITER_INTENT);
- bch2_trans_copy_iter(&dst, &src);
- bch2_trans_copy_iter(&del, &src);
-
- while (ret == 0 ||
- bch2_err_matches(ret, BCH_ERR_transaction_restart)) {
- struct disk_reservation disk_res =
- bch2_disk_reservation_init(c, 0);
- struct bkey_i delete;
- struct bkey_s_c k;
- struct bpos next_pos;
- struct bpos move_pos = POS(inode->v.i_ino, offset >> 9);
- struct bpos atomic_end;
- unsigned trigger_flags = 0;
- u32 snapshot;
-
- bch2_trans_begin(&trans);
-
- ret = bch2_subvolume_get_snapshot(&trans,
- inode->ei_subvol, &snapshot);
- if (ret)
- continue;
-
- bch2_btree_iter_set_snapshot(&src, snapshot);
- bch2_btree_iter_set_snapshot(&dst, snapshot);
- bch2_btree_iter_set_snapshot(&del, snapshot);
-
- bch2_trans_begin(&trans);
-
- k = insert
- ? bch2_btree_iter_peek_prev(&src)
- : bch2_btree_iter_peek_upto(&src, POS(inode->v.i_ino, U64_MAX));
- if ((ret = bkey_err(k)))
- continue;
-
- if (!k.k || k.k->p.inode != inode->v.i_ino)
- break;
-
- if (insert &&
- bkey_le(k.k->p, POS(inode->v.i_ino, offset >> 9)))
- break;
-reassemble:
- bch2_bkey_buf_reassemble(©, c, k);
-
- if (insert &&
- bkey_lt(bkey_start_pos(k.k), move_pos))
- bch2_cut_front(move_pos, copy.k);
-
- copy.k->k.p.offset += shift >> 9;
- bch2_btree_iter_set_pos(&dst, bkey_start_pos(©.k->k));
-
- ret = bch2_extent_atomic_end(&trans, &dst, copy.k, &atomic_end);
- if (ret)
- continue;
-
- if (!bkey_eq(atomic_end, copy.k->k.p)) {
- if (insert) {
- move_pos = atomic_end;
- move_pos.offset -= shift >> 9;
- goto reassemble;
- } else {
- bch2_cut_back(atomic_end, copy.k);
- }
- }
-
- bkey_init(&delete.k);
- delete.k.p = copy.k->k.p;
- delete.k.size = copy.k->k.size;
- delete.k.p.offset -= shift >> 9;
- bch2_btree_iter_set_pos(&del, bkey_start_pos(&delete.k));
-
- next_pos = insert ? bkey_start_pos(&delete.k) : delete.k.p;
-
- if (copy.k->k.size != k.k->size) {
- /* We might end up splitting compressed extents: */
- unsigned nr_ptrs =
- bch2_bkey_nr_ptrs_allocated(bkey_i_to_s_c(copy.k));
-
- ret = bch2_disk_reservation_get(c, &disk_res,
- copy.k->k.size, nr_ptrs,
- BCH_DISK_RESERVATION_NOFAIL);
- BUG_ON(ret);
- }
-
- ret = bch2_btree_iter_traverse(&del) ?:
- bch2_trans_update(&trans, &del, &delete, trigger_flags) ?:
- bch2_trans_update(&trans, &dst, copy.k, trigger_flags) ?:
- bch2_trans_commit(&trans, &disk_res, NULL,
- BTREE_INSERT_NOFAIL);
- bch2_disk_reservation_put(c, &disk_res);
-
- if (!ret)
- bch2_btree_iter_set_pos(&src, next_pos);
- }
- bch2_trans_iter_exit(&trans, &del);
- bch2_trans_iter_exit(&trans, &dst);
- bch2_trans_iter_exit(&trans, &src);
- bch2_trans_exit(&trans);
- bch2_bkey_buf_exit(©, c);
-
- if (ret)
- return ret;
+ ret = bch2_fcollapse_finsert(c, inode_inum(inode), offset >> 9, len >> 9,
+ insert, &i_sectors_delta);
+ if (!ret && !insert)
+ i_size_write(&inode->v, inode->v.i_size - len);
+ bch2_i_sectors_acct(c, inode, NULL, i_sectors_delta);
- mutex_lock(&inode->ei_update_lock);
- if (!insert) {
- i_size_write(&inode->v, new_size);
- ret = bch2_write_inode_size(c, inode, new_size,
- ATTR_MTIME|ATTR_CTIME);
- } else {
- /* We need an inode update to update bi_journal_seq for fsync: */
- ret = bch2_write_inode(c, inode, inode_update_times_fn, NULL,
- ATTR_MTIME|ATTR_CTIME);
- }
- mutex_unlock(&inode->ei_update_lock);
return ret;
}
int bch2_fsync(struct file *, loff_t, loff_t, int);
-int bch2_truncate(struct mnt_idmap *,
+int bchfs_truncate(struct mnt_idmap *,
struct bch_inode_info *, struct iattr *);
long bch2_fallocate_dispatch(struct file *, int, loff_t, loff_t);
return ret;
return iattr->ia_valid & ATTR_SIZE
- ? bch2_truncate(idmap, inode, iattr)
+ ? bchfs_truncate(idmap, inode, iattr)
: bch2_setattr_nonsize(idmap, inode, iattr);
}
#include "btree_update.h"
#include "buckets.h"
#include "clock.h"
+#include "error.h"
#include "extents.h"
+#include "extent_update.h"
+#include "inode.h"
#include "io_misc.h"
#include "io_write.h"
#include "subvolume.h"
return ret;
}
+
+static int truncate_set_isize(struct btree_trans *trans,
+ subvol_inum inum,
+ u64 new_i_size)
+{
+ struct btree_iter iter = { NULL };
+ struct bch_inode_unpacked inode_u;
+ int ret;
+
+ ret = bch2_inode_peek(trans, &iter, &inode_u, inum, BTREE_ITER_INTENT) ?:
+ (inode_u.bi_size = new_i_size, 0) ?:
+ bch2_inode_write(trans, &iter, &inode_u);
+
+ bch2_trans_iter_exit(trans, &iter);
+ return ret;
+}
+
+int bch2_truncate(struct bch_fs *c, subvol_inum inum, u64 new_i_size, u64 *i_sectors_delta)
+{
+ struct btree_trans trans;
+ struct btree_iter fpunch_iter;
+ int ret;
+
+ bch2_trans_init(&trans, c, BTREE_ITER_MAX, 1024);
+ bch2_trans_iter_init(&trans, &fpunch_iter, BTREE_ID_extents,
+ POS(inum.inum, round_up(new_i_size, block_bytes(c)) >> 9),
+ BTREE_ITER_INTENT);
+
+ ret = commit_do(&trans, NULL, NULL, BTREE_INSERT_NOFAIL,
+ truncate_set_isize(&trans, inum, new_i_size));
+ if (ret)
+ goto err;
+
+ ret = bch2_fpunch_at(&trans, &fpunch_iter, inum, U64_MAX, i_sectors_delta);
+ if (bch2_err_matches(ret, BCH_ERR_transaction_restart))
+ ret = 0;
+ if (ret)
+ goto err;
+err:
+ bch2_trans_iter_exit(&trans, &fpunch_iter);
+ bch2_trans_exit(&trans);
+
+ bch2_fs_fatal_err_on(ret, c, "%s: error truncating %u:%llu: %s",
+ __func__, inum.subvol, inum.inum, bch2_err_str(ret));
+ return ret;
+}
+
+static int adjust_i_size(struct btree_trans *trans, subvol_inum inum, u64 offset, s64 len)
+{
+ struct btree_iter iter;
+ struct bch_inode_unpacked inode_u;
+ int ret;
+
+ offset <<= 9;
+ len <<= 9;
+
+ ret = bch2_inode_peek(trans, &iter, &inode_u, inum, BTREE_ITER_INTENT);
+ if (ret)
+ return ret;
+
+ if (len > 0) {
+ if (MAX_LFS_FILESIZE - inode_u.bi_size < len) {
+ ret = -EFBIG;
+ goto err;
+ }
+
+ if (offset >= inode_u.bi_size) {
+ ret = -EINVAL;
+ goto err;
+ }
+ }
+
+ inode_u.bi_size += len;
+ inode_u.bi_mtime = inode_u.bi_ctime = bch2_current_time(trans->c);
+
+ ret = bch2_inode_write(trans, &iter, &inode_u);
+err:
+ bch2_trans_iter_exit(trans, &iter);
+ return ret;
+}
+
+int bch2_fcollapse_finsert(struct bch_fs *c, subvol_inum inum,
+ u64 offset, u64 len, bool insert,
+ s64 *i_sectors_delta)
+{
+ struct bkey_buf copy;
+ struct btree_trans trans;
+ struct btree_iter src = { NULL }, dst = { NULL }, del = { NULL };
+ s64 shift = insert ? len : -len;
+ int ret = 0;
+
+ bch2_bkey_buf_init(©);
+ bch2_trans_init(&trans, c, 0, 1024);
+
+ bch2_trans_iter_init(&trans, &src, BTREE_ID_extents,
+ POS(inum.inum, U64_MAX),
+ BTREE_ITER_INTENT);
+ bch2_trans_copy_iter(&dst, &src);
+ bch2_trans_copy_iter(&del, &src);
+
+ if (insert) {
+ ret = commit_do(&trans, NULL, NULL, BTREE_INSERT_NOFAIL,
+ adjust_i_size(&trans, inum, offset, len));
+ if (ret)
+ goto err;
+ } else {
+ bch2_btree_iter_set_pos(&src, POS(inum.inum, offset));
+
+ ret = bch2_fpunch_at(&trans, &src, inum, offset + len, i_sectors_delta);
+ if (ret && !bch2_err_matches(ret, BCH_ERR_transaction_restart))
+ goto err;
+
+ bch2_btree_iter_set_pos(&src, POS(inum.inum, offset + len));
+ }
+
+ while (ret == 0 || bch2_err_matches(ret, BCH_ERR_transaction_restart)) {
+ struct disk_reservation disk_res =
+ bch2_disk_reservation_init(c, 0);
+ struct bkey_i delete;
+ struct bkey_s_c k;
+ struct bpos next_pos;
+ struct bpos move_pos = POS(inum.inum, offset);
+ struct bpos atomic_end;
+ unsigned trigger_flags = 0;
+ u32 snapshot;
+
+ bch2_trans_begin(&trans);
+
+ ret = bch2_subvolume_get_snapshot(&trans, inum.subvol, &snapshot);
+ if (ret)
+ continue;
+
+ bch2_btree_iter_set_snapshot(&src, snapshot);
+ bch2_btree_iter_set_snapshot(&dst, snapshot);
+ bch2_btree_iter_set_snapshot(&del, snapshot);
+
+ bch2_trans_begin(&trans);
+
+ k = insert
+ ? bch2_btree_iter_peek_prev(&src)
+ : bch2_btree_iter_peek_upto(&src, POS(inum.inum, U64_MAX));
+ if ((ret = bkey_err(k)))
+ continue;
+
+ if (!k.k || k.k->p.inode != inum.inum)
+ break;
+
+ if (insert &&
+ bkey_le(k.k->p, POS(inum.inum, offset)))
+ break;
+reassemble:
+ bch2_bkey_buf_reassemble(©, c, k);
+
+ if (insert &&
+ bkey_lt(bkey_start_pos(k.k), move_pos))
+ bch2_cut_front(move_pos, copy.k);
+
+ copy.k->k.p.offset += shift;
+ bch2_btree_iter_set_pos(&dst, bkey_start_pos(©.k->k));
+
+ ret = bch2_extent_atomic_end(&trans, &dst, copy.k, &atomic_end);
+ if (ret)
+ continue;
+
+ if (!bkey_eq(atomic_end, copy.k->k.p)) {
+ if (insert) {
+ move_pos = atomic_end;
+ move_pos.offset -= shift;
+ goto reassemble;
+ } else {
+ bch2_cut_back(atomic_end, copy.k);
+ }
+ }
+
+ bkey_init(&delete.k);
+ delete.k.p = copy.k->k.p;
+ delete.k.size = copy.k->k.size;
+ delete.k.p.offset -= shift;
+ bch2_btree_iter_set_pos(&del, bkey_start_pos(&delete.k));
+
+ next_pos = insert ? bkey_start_pos(&delete.k) : delete.k.p;
+
+ if (copy.k->k.size != k.k->size) {
+ /* We might end up splitting compressed extents: */
+ unsigned nr_ptrs =
+ bch2_bkey_nr_ptrs_allocated(bkey_i_to_s_c(copy.k));
+
+ ret = bch2_disk_reservation_get(c, &disk_res,
+ copy.k->k.size, nr_ptrs,
+ BCH_DISK_RESERVATION_NOFAIL);
+ BUG_ON(ret);
+ }
+
+ ret = bch2_btree_iter_traverse(&del) ?:
+ bch2_trans_update(&trans, &del, &delete, trigger_flags) ?:
+ bch2_trans_update(&trans, &dst, copy.k, trigger_flags) ?:
+ bch2_trans_commit(&trans, &disk_res, NULL,
+ BTREE_INSERT_NOFAIL);
+ bch2_disk_reservation_put(c, &disk_res);
+
+ if (!ret)
+ bch2_btree_iter_set_pos(&src, next_pos);
+ }
+
+ if (ret && !bch2_err_matches(ret, BCH_ERR_transaction_restart))
+ goto err;
+
+ if (!insert) {
+ ret = commit_do(&trans, NULL, NULL, BTREE_INSERT_NOFAIL,
+ adjust_i_size(&trans, inum, offset, -len));
+ } else {
+ /* We need an inode update to update bi_journal_seq for fsync: */
+ ret = commit_do(&trans, NULL, NULL, BTREE_INSERT_NOFAIL,
+ adjust_i_size(&trans, inum, 0, 0));
+ }
+err:
+ bch2_trans_iter_exit(&trans, &del);
+ bch2_trans_iter_exit(&trans, &dst);
+ bch2_trans_iter_exit(&trans, &src);
+ bch2_trans_exit(&trans);
+ bch2_bkey_buf_exit(©, c);
+ return ret;
+}
subvol_inum, u64, s64 *);
int bch2_fpunch(struct bch_fs *c, subvol_inum, u64, u64, s64 *);
+int bch2_truncate(struct bch_fs *, subvol_inum, u64, u64 *);
+int bch2_fcollapse_finsert(struct bch_fs *, subvol_inum, u64, u64, bool, s64 *);
+
#endif /* _BCACHEFS_IO_MISC_H */
projects / linux.git / commitdiff