}
#endif
-/*
- * Calculate the number of metadata blocks need to reserve
- * to allocate a block located at @lblock
- */
-static int ext4_calc_metadata_amount(struct inode *inode, ext4_lblk_t lblock)
-{
- if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))
- return ext4_ext_calc_metadata_amount(inode, lblock);
-
- return ext4_ind_calc_metadata_amount(inode, lblock);
-}
-
/*
* Called with i_data_sem down, which is important since we can call
* ext4_discard_preallocations() from here.
used = ei->i_reserved_data_blocks;
}
- if (unlikely(ei->i_allocated_meta_blocks > ei->i_reserved_meta_blocks)) {
- ext4_warning(inode->i_sb, "ino %lu, allocated %d "
- "with only %d reserved metadata blocks "
- "(releasing %d blocks with reserved %d data blocks)",
- inode->i_ino, ei->i_allocated_meta_blocks,
- ei->i_reserved_meta_blocks, used,
- ei->i_reserved_data_blocks);
- WARN_ON(1);
- ei->i_allocated_meta_blocks = ei->i_reserved_meta_blocks;
- }
-
/* Update per-inode reservations */
ei->i_reserved_data_blocks -= used;
- ei->i_reserved_meta_blocks -= ei->i_allocated_meta_blocks;
- percpu_counter_sub(&sbi->s_dirtyclusters_counter,
- used + ei->i_allocated_meta_blocks);
- ei->i_allocated_meta_blocks = 0;
+ percpu_counter_sub(&sbi->s_dirtyclusters_counter, used);
- if (ei->i_reserved_data_blocks == 0) {
- /*
- * We can release all of the reserved metadata blocks
- * only when we have written all of the delayed
- * allocation blocks.
- */
- percpu_counter_sub(&sbi->s_dirtyclusters_counter,
- ei->i_reserved_meta_blocks);
- ei->i_reserved_meta_blocks = 0;
- ei->i_da_metadata_calc_len = 0;
- }
spin_unlock(&EXT4_I(inode)->i_block_reservation_lock);
/* Update quota subsystem for data blocks */
return ret ? ret : copied;
}
-/*
- * Reserve a metadata for a single block located at lblock
- */
-static int ext4_da_reserve_metadata(struct inode *inode, ext4_lblk_t lblock)
-{
- struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
- struct ext4_inode_info *ei = EXT4_I(inode);
- unsigned int md_needed;
- ext4_lblk_t save_last_lblock;
- int save_len;
-
- /*
- * recalculate the amount of metadata blocks to reserve
- * in order to allocate nrblocks
- * worse case is one extent per block
- */
- spin_lock(&ei->i_block_reservation_lock);
- /*
- * ext4_calc_metadata_amount() has side effects, which we have
- * to be prepared undo if we fail to claim space.
- */
- save_len = ei->i_da_metadata_calc_len;
- save_last_lblock = ei->i_da_metadata_calc_last_lblock;
- md_needed = EXT4_NUM_B2C(sbi,
- ext4_calc_metadata_amount(inode, lblock));
- trace_ext4_da_reserve_space(inode, md_needed);
-
- /*
- * We do still charge estimated metadata to the sb though;
- * we cannot afford to run out of free blocks.
- */
- if (ext4_claim_free_clusters(sbi, md_needed, 0)) {
- ei->i_da_metadata_calc_len = save_len;
- ei->i_da_metadata_calc_last_lblock = save_last_lblock;
- spin_unlock(&ei->i_block_reservation_lock);
- return -ENOSPC;
- }
- ei->i_reserved_meta_blocks += md_needed;
- spin_unlock(&ei->i_block_reservation_lock);
-
- return 0; /* success */
-}
-
/*
* Reserve a single cluster located at lblock
*/
struct ext4_inode_info *ei = EXT4_I(inode);
unsigned int md_needed;
int ret;
- ext4_lblk_t save_last_lblock;
- int save_len;
/*
* We will charge metadata quota at writeout time; this saves
* ext4_calc_metadata_amount() has side effects, which we have
* to be prepared undo if we fail to claim space.
*/
- save_len = ei->i_da_metadata_calc_len;
- save_last_lblock = ei->i_da_metadata_calc_last_lblock;
- md_needed = EXT4_NUM_B2C(sbi,
- ext4_calc_metadata_amount(inode, lblock));
- trace_ext4_da_reserve_space(inode, md_needed);
+ md_needed = 0;
+ trace_ext4_da_reserve_space(inode, 0);
- /*
- * We do still charge estimated metadata to the sb though;
- * we cannot afford to run out of free blocks.
- */
- if (ext4_claim_free_clusters(sbi, md_needed + 1, 0)) {
- ei->i_da_metadata_calc_len = save_len;
- ei->i_da_metadata_calc_last_lblock = save_last_lblock;
+ if (ext4_claim_free_clusters(sbi, 1, 0)) {
spin_unlock(&ei->i_block_reservation_lock);
dquot_release_reservation_block(inode, EXT4_C2B(sbi, 1));
return -ENOSPC;
}
ei->i_reserved_data_blocks++;
- ei->i_reserved_meta_blocks += md_needed;
spin_unlock(&ei->i_block_reservation_lock);
return 0; /* success */
}
ei->i_reserved_data_blocks -= to_free;
- if (ei->i_reserved_data_blocks == 0) {
- /*
- * We can release all of the reserved metadata blocks
- * only when we have written all of the delayed
- * allocation blocks.
- * Note that in case of bigalloc, i_reserved_meta_blocks,
- * i_reserved_data_blocks, etc. refer to number of clusters.
- */
- percpu_counter_sub(&sbi->s_dirtyclusters_counter,
- ei->i_reserved_meta_blocks);
- ei->i_reserved_meta_blocks = 0;
- ei->i_da_metadata_calc_len = 0;
- }
-
/* update fs dirty data blocks counter */
percpu_counter_sub(&sbi->s_dirtyclusters_counter, to_free);
ext4_msg(sb, KERN_CRIT, "Block reservation details");
ext4_msg(sb, KERN_CRIT, "i_reserved_data_blocks=%u",
ei->i_reserved_data_blocks);
- ext4_msg(sb, KERN_CRIT, "i_reserved_meta_blocks=%u",
- ei->i_reserved_meta_blocks);
- ext4_msg(sb, KERN_CRIT, "i_allocated_meta_blocks=%u",
- ei->i_allocated_meta_blocks);
return;
}
retval = ret;
goto out_unlock;
}
- } else {
- ret = ext4_da_reserve_metadata(inode, iblock);
- if (ret) {
- /* not enough space to reserve */
- retval = ret;
- goto out_unlock;
- }
}
ret = ext4_es_insert_extent(inode, map->m_lblk, map->m_len,
{
trace_ext4_alloc_da_blocks(inode);
- if (!EXT4_I(inode)->i_reserved_data_blocks &&
- !EXT4_I(inode)->i_reserved_meta_blocks)
+ if (!EXT4_I(inode)->i_reserved_data_blocks)
return 0;
/*
*
*/
static ssize_t ext4_ext_direct_IO(int rw, struct kiocb *iocb,
- const struct iovec *iov, loff_t offset,
- unsigned long nr_segs)
+ struct iov_iter *iter, loff_t offset)
{
struct file *file = iocb->ki_filp;
struct inode *inode = file->f_mapping->host;
ssize_t ret;
- size_t count = iov_length(iov, nr_segs);
+ size_t count = iov_iter_count(iter);
int overwrite = 0;
get_block_t *get_block_func = NULL;
int dio_flags = 0;
/* Use the old path for reads and writes beyond i_size. */
if (rw != WRITE || final_size > inode->i_size)
- return ext4_ind_direct_IO(rw, iocb, iov, offset, nr_segs);
+ return ext4_ind_direct_IO(rw, iocb, iter, offset);
BUG_ON(iocb->private == NULL);
dio_flags = DIO_LOCKING;
}
ret = __blockdev_direct_IO(rw, iocb, inode,
- inode->i_sb->s_bdev, iov,
- offset, nr_segs,
+ inode->i_sb->s_bdev, iter,
+ offset,
get_block_func,
ext4_end_io_dio,
NULL,
}
static ssize_t ext4_direct_IO(int rw, struct kiocb *iocb,
- const struct iovec *iov, loff_t offset,
- unsigned long nr_segs)
+ struct iov_iter *iter, loff_t offset)
{
struct file *file = iocb->ki_filp;
struct inode *inode = file->f_mapping->host;
+ size_t count = iov_iter_count(iter);
ssize_t ret;
/*
if (ext4_has_inline_data(inode))
return 0;
- trace_ext4_direct_IO_enter(inode, offset, iov_length(iov, nr_segs), rw);
+ trace_ext4_direct_IO_enter(inode, offset, count, rw);
if (ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))
- ret = ext4_ext_direct_IO(rw, iocb, iov, offset, nr_segs);
+ ret = ext4_ext_direct_IO(rw, iocb, iter, offset);
else
- ret = ext4_ind_direct_IO(rw, iocb, iov, offset, nr_segs);
- trace_ext4_direct_IO_exit(inode, offset,
- iov_length(iov, nr_segs), rw, ret);
+ ret = ext4_ind_direct_IO(rw, iocb, iter, offset);
+ trace_ext4_direct_IO_exit(inode, offset, count, rw, ret);
return ret;
}
projects / firefly-linux-kernel-4.4.55.git / blobdiff