diff options
Diffstat (limited to 'fs/ext4')
| -rw-r--r-- | fs/ext4/file.c | 14 | ||||
| -rw-r--r-- | fs/ext4/inode.c | 4 | ||||
| -rw-r--r-- | fs/ext4/ioctl.c | 4 | ||||
| -rw-r--r-- | fs/ext4/mballoc.c | 4 | ||||
| -rw-r--r-- | fs/ext4/super.c | 8 |
5 files changed, 19 insertions, 15 deletions
diff --git a/fs/ext4/file.c b/fs/ext4/file.c index 0166bb9ca160..6aa15dafc677 100644 --- a/fs/ext4/file.c +++ b/fs/ext4/file.c @@ -349,9 +349,10 @@ static void ext4_inode_extension_cleanup(struct inode *inode, ssize_t count) return; } /* - * If i_disksize got extended due to writeback of delalloc blocks while - * the DIO was running we could fail to cleanup the orphan list in - * ext4_handle_inode_extension(). Do it now. + * If i_disksize got extended either due to writeback of delalloc + * blocks or extending truncate while the DIO was running we could fail + * to cleanup the orphan list in ext4_handle_inode_extension(). Do it + * now. */ if (!list_empty(&EXT4_I(inode)->i_orphan) && inode->i_nlink) { handle_t *handle = ext4_journal_start(inode, EXT4_HT_INODE, 2); @@ -386,10 +387,11 @@ static int ext4_dio_write_end_io(struct kiocb *iocb, ssize_t size, * blocks. But the code in ext4_iomap_alloc() is careful to use * zeroed/unwritten extents if this is possible; thus we won't leave * uninitialized blocks in a file even if we didn't succeed in writing - * as much as we intended. + * as much as we intended. Also we can race with truncate or write + * expanding the file so we have to be a bit careful here. */ - WARN_ON_ONCE(i_size_read(inode) < READ_ONCE(EXT4_I(inode)->i_disksize)); - if (pos + size <= READ_ONCE(EXT4_I(inode)->i_disksize)) + if (pos + size <= READ_ONCE(EXT4_I(inode)->i_disksize) && + pos + size <= i_size_read(inode)) return size; return ext4_handle_inode_extension(inode, pos, size); } diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index 61277f7f8722..0558c8c986d4 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -1261,7 +1261,7 @@ static int write_end_fn(handle_t *handle, struct inode *inode, * We need to pick up the new inode size which generic_commit_write gave us * `file' can be NULL - eg, when called from page_symlink(). * - * ext4 never places buffers on inode->i_mapping->private_list. metadata + * ext4 never places buffers on inode->i_mapping->i_private_list. metadata * buffers are managed internally. */ static int ext4_write_end(struct file *file, @@ -3213,7 +3213,7 @@ static bool ext4_inode_datasync_dirty(struct inode *inode) } /* Any metadata buffers to write? */ - if (!list_empty(&inode->i_mapping->private_list)) + if (!list_empty(&inode->i_mapping->i_private_list)) return true; return inode->i_state & I_DIRTY_DATASYNC; } diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c index 4f931f80cb34..aa6be510eb8f 100644 --- a/fs/ext4/ioctl.c +++ b/fs/ext4/ioctl.c @@ -819,11 +819,11 @@ int ext4_force_shutdown(struct super_block *sb, u32 flags) switch (flags) { case EXT4_GOING_FLAGS_DEFAULT: - ret = freeze_bdev(sb->s_bdev); + ret = bdev_freeze(sb->s_bdev); if (ret) return ret; set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); - thaw_bdev(sb->s_bdev); + bdev_thaw(sb->s_bdev); break; case EXT4_GOING_FLAGS_LOGFLUSH: set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags); diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c index 454d5612641e..d72b5e3c92ec 100644 --- a/fs/ext4/mballoc.c +++ b/fs/ext4/mballoc.c @@ -4478,6 +4478,10 @@ ext4_mb_normalize_request(struct ext4_allocation_context *ac, start = max(start, rounddown(ac->ac_o_ex.fe_logical, (ext4_lblk_t)EXT4_BLOCKS_PER_GROUP(ac->ac_sb))); + /* avoid unnecessary preallocation that may trigger assertions */ + if (start + size > EXT_MAX_BLOCKS) + size = EXT_MAX_BLOCKS - start; + /* don't cover already allocated blocks in selected range */ if (ar->pleft && start <= ar->lleft) { size -= ar->lleft + 1 - start; diff --git a/fs/ext4/super.c b/fs/ext4/super.c index c5fcf377ab1f..0980845c8b8f 100644 --- a/fs/ext4/super.c +++ b/fs/ext4/super.c @@ -5864,11 +5864,9 @@ static struct bdev_handle *ext4_get_journal_blkdev(struct super_block *sb, struct ext4_super_block *es; int errno; - /* see get_tree_bdev why this is needed and safe */ - up_write(&sb->s_umount); - bdev_handle = bdev_open_by_dev(j_dev, BLK_OPEN_READ | BLK_OPEN_WRITE, - sb, &fs_holder_ops); - down_write(&sb->s_umount); + bdev_handle = bdev_open_by_dev(j_dev, + BLK_OPEN_READ | BLK_OPEN_WRITE | BLK_OPEN_RESTRICT_WRITES, + sb, &fs_holder_ops); if (IS_ERR(bdev_handle)) { ext4_msg(sb, KERN_ERR, "failed to open journal device unknown-block(%u,%u) %ld", |