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ext4: fast commit recovery path

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This patch adds fast commit recovery path support for Ext4 file
system. We add several helper functions that are similar in spirit to
e2fsprogs journal recovery path handlers. Example of such functions
include - a simple block allocator, idempotent block bitmap update
function etc. Using these routines and the fast commit log in the fast
commit area, the recovery path (ext4_fc_replay()) performs fast commit
log recovery.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Harshad Shirwadkar <harshadshirwadkar@gmail.com>
Link: https://lore.kernel.org/r/20201015203802.3597742-8-harshadshirwadkar@gmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Harshad Shirwadkar
2020-10-15 13:37:59 -07:00
committed by Theodore Ts'o
parent 5b849b5f96
commit 8016e29f43
14 changed files with 1820 additions and 130 deletions
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6
fs/ext4/ioctl.c
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@@ -86,7 +86,7 @@ static void swap_inode_data(struct inode *inode1, struct inode *inode2)
i_size_write(inode2, isize);
}
static void reset_inode_seed(struct inode *inode)
void ext4_reset_inode_seed(struct inode *inode)
{
struct ext4_inode_info *ei = EXT4_I(inode);
struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
@@ -200,8 +200,8 @@ static long swap_inode_boot_loader(struct super_block *sb,
inode->i_generation = prandom_u32();
inode_bl->i_generation = prandom_u32();
reset_inode_seed(inode);
reset_inode_seed(inode_bl);
ext4_reset_inode_seed(inode);
ext4_reset_inode_seed(inode_bl);
ext4_discard_preallocations(inode, 0);