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f2fs: let user being aware of IO error

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Sometimes we keep dumb when IO error occur in lower layer device, so user
will not receive any error return value for some operation, but actually,
the operation did not succeed.

This sould be avoided, so this patch reports such kind of error to user.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu
2015-12-24 18:04:56 +08:00
committed by Jaegeuk Kim
parent d53841740f
commit 6d5a1495ee
6 changed files with 32 additions and 23 deletions
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fs/f2fs/data.c
+13 -10
View File
@@ -498,7 +498,7 @@ alloc:
return 0;
}
static void __allocate_data_blocks(struct inode *inode, loff_t offset,
static int __allocate_data_blocks(struct inode *inode, loff_t offset,
size_t count)
{
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
@@ -507,13 +507,15 @@ static void __allocate_data_blocks(struct inode *inode, loff_t offset,
u64 len = F2FS_BYTES_TO_BLK(count);
bool allocated;
u64 end_offset;
int err = 0;
while (len) {
f2fs_lock_op(sbi);
/* When reading holes, we need its node page */
set_new_dnode(&dn, inode, NULL, NULL, 0);
if (get_dnode_of_data(&dn, start, ALLOC_NODE))
err = get_dnode_of_data(&dn, start, ALLOC_NODE);
if (err)
goto out;
allocated = false;
@@ -522,12 +524,15 @@ static void __allocate_data_blocks(struct inode *inode, loff_t offset,
while (dn.ofs_in_node < end_offset && len) {
block_t blkaddr;
if (unlikely(f2fs_cp_error(sbi)))
if (unlikely(f2fs_cp_error(sbi))) {
err = -EIO;
goto sync_out;
}
blkaddr = datablock_addr(dn.node_page, dn.ofs_in_node);
if (blkaddr == NULL_ADDR || blkaddr == NEW_ADDR) {
if (__allocate_data_block(&dn))
err = __allocate_data_block(&dn);
if (err)
goto sync_out;
allocated = true;
}
@@ -545,7 +550,7 @@ static void __allocate_data_blocks(struct inode *inode, loff_t offset,
if (dn.node_changed)
f2fs_balance_fs(sbi);
}
return;
return err;
sync_out:
if (allocated)
@@ -555,7 +560,7 @@ out:
f2fs_unlock_op(sbi);
if (dn.node_changed)
f2fs_balance_fs(sbi);
return;
return err;
}
/*
@@ -1653,11 +1658,9 @@ static ssize_t f2fs_direct_IO(struct kiocb *iocb, struct iov_iter *iter,
trace_f2fs_direct_IO_enter(inode, offset, count, iov_iter_rw(iter));
if (iov_iter_rw(iter) == WRITE) {
__allocate_data_blocks(inode, offset, count);
if (unlikely(f2fs_cp_error(F2FS_I_SB(inode)))) {
err = -EIO;
err = __allocate_data_blocks(inode, offset, count);
if (err)
goto out;
}
}
err = blockdev_direct_IO(iocb, inode, iter, offset, get_data_block_dio);