diff options
Diffstat (limited to 'fs/ext4/inode.c')
| -rw-r--r-- | fs/ext4/inode.c | 36 |
1 files changed, 33 insertions, 3 deletions
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c index c7fed5b18745..8290cfbd9fa7 100644 --- a/fs/ext4/inode.c +++ b/fs/ext4/inode.c @@ -975,6 +975,17 @@ out: return err; } +qsize_t ext4_get_reserved_space(struct inode *inode) +{ + unsigned long long total; + + spin_lock(&EXT4_I(inode)->i_block_reservation_lock); + total = EXT4_I(inode)->i_reserved_data_blocks + + EXT4_I(inode)->i_reserved_meta_blocks; + spin_unlock(&EXT4_I(inode)->i_block_reservation_lock); + + return total; +} /* * Calculate the number of metadata blocks need to reserve * to allocate @blocks for non extent file based file @@ -1036,8 +1047,14 @@ static void ext4_da_update_reserve_space(struct inode *inode, int used) /* update per-inode reservations */ BUG_ON(used > EXT4_I(inode)->i_reserved_data_blocks); EXT4_I(inode)->i_reserved_data_blocks -= used; - spin_unlock(&EXT4_I(inode)->i_block_reservation_lock); + + /* + * free those over-booking quota for metadata blocks + */ + + if (mdb_free) + vfs_dq_release_reservation_block(inode, mdb_free); } /* @@ -1553,8 +1570,8 @@ static int ext4_journalled_write_end(struct file *file, static int ext4_da_reserve_space(struct inode *inode, int nrblocks) { int retries = 0; - struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); - unsigned long md_needed, mdblocks, total = 0; + struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb); + unsigned long md_needed, mdblocks, total = 0; /* * recalculate the amount of metadata blocks to reserve @@ -1570,12 +1587,23 @@ repeat: md_needed = mdblocks - EXT4_I(inode)->i_reserved_meta_blocks; total = md_needed + nrblocks; + /* + * Make quota reservation here to prevent quota overflow + * later. Real quota accounting is done at pages writeout + * time. + */ + if (vfs_dq_reserve_block(inode, total)) { + spin_unlock(&EXT4_I(inode)->i_block_reservation_lock); + return -EDQUOT; + } + if (ext4_claim_free_blocks(sbi, total)) { spin_unlock(&EXT4_I(inode)->i_block_reservation_lock); if (ext4_should_retry_alloc(inode->i_sb, &retries)) { yield(); goto repeat; } + vfs_dq_release_reservation_block(inode, total); return -ENOSPC; } EXT4_I(inode)->i_reserved_data_blocks += nrblocks; @@ -1629,6 +1657,8 @@ static void ext4_da_release_space(struct inode *inode, int to_free) BUG_ON(mdb > EXT4_I(inode)->i_reserved_meta_blocks); EXT4_I(inode)->i_reserved_meta_blocks = mdb; spin_unlock(&EXT4_I(inode)->i_block_reservation_lock); + + vfs_dq_release_reservation_block(inode, release); } static void ext4_da_page_release_reservation(struct page *page, |