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ext4: main fast-commit commit path

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This patch adds main fast commit commit path handlers. The overall
patch can be divided into two inter-related parts:

(A) Metadata updates tracking

    This part consists of helper functions to track changes that need
    to be committed during a commit operation. These updates are
    maintained by Ext4 in different in-memory queues. Following are
    the APIs and their short description that are implemented in this
    patch:

    - ext4_fc_track_link/unlink/creat() - Track unlink. link and creat
      operations
    - ext4_fc_track_range() - Track changed logical block offsets
      inodes
    - ext4_fc_track_inode() - Track inodes
    - ext4_fc_mark_ineligible() - Mark file system fast commit
      ineligible()
    - ext4_fc_start_update() / ext4_fc_stop_update() /
      ext4_fc_start_ineligible() / ext4_fc_stop_ineligible() These
      functions are useful for co-ordinating inode updates with
      commits.

(B) Main commit Path

    This part consists of functions to convert updates tracked in
    in-memory data structures into on-disk commits. Function
    ext4_fc_commit() is the main entry point to commit path.

Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Harshad Shirwadkar <harshadshirwadkar@gmail.com>
Link: https://lore.kernel.org/r/20201015203802.3597742-6-harshadshirwadkar@gmail.com
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
This commit is contained in:
Harshad Shirwadkar 2020-10-15 13:37:57 -07:00 committed by Theodore Ts'o
parent ff780b91ef
commit aa75f4d3da
13 changed files with 1707 additions and 29 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
fs/ext4/acl.c
View File

@ -242,6 +242,7 @@ retry:
handle = ext4_journal_start(inode, EXT4_HT_XATTR, credits);
if (IS_ERR(handle))
return PTR_ERR(handle);
ext4_fc_start_update(inode);
if ((type == ACL_TYPE_ACCESS) && acl) {
error = posix_acl_update_mode(inode, &mode, &acl);
@ -259,6 +260,7 @@ retry:
}
out_stop:
ext4_journal_stop(handle);
ext4_fc_stop_update(inode);
if (error == -ENOSPC && ext4_should_retry_alloc(inode->i_sb, &retries))
goto retry;
return error;

70
fs/ext4/ext4.h
View File

@ -1021,6 +1021,31 @@ struct ext4_inode_info {
struct list_head i_orphan; /* unlinked but open inodes */
/* Fast commit related info */
struct list_head i_fc_list; /*
* inodes that need fast commit
* protected by sbi->s_fc_lock.
*/
/* Fast commit subtid when this inode was committed */
unsigned int i_fc_committed_subtid;
/* Start of lblk range that needs to be committed in this fast commit */
ext4_lblk_t i_fc_lblk_start;
/* End of lblk range that needs to be committed in this fast commit */
ext4_lblk_t i_fc_lblk_len;
/* Number of ongoing updates on this inode */
atomic_t i_fc_updates;
/* Fast commit wait queue for this inode */
wait_queue_head_t i_fc_wait;
/* Protect concurrent accesses on i_fc_lblk_start, i_fc_lblk_len */
struct mutex i_fc_lock;
/*
* i_disksize keeps track of what the inode size is ON DISK, not
* in memory. During truncate, i_size is set to the new size by
@ -1141,6 +1166,10 @@ struct ext4_inode_info {
#define EXT4_VALID_FS 0x0001 /* Unmounted cleanly */
#define EXT4_ERROR_FS 0x0002 /* Errors detected */
#define EXT4_ORPHAN_FS 0x0004 /* Orphans being recovered */
#define EXT4_FC_INELIGIBLE 0x0008 /* Fast commit ineligible */
#define EXT4_FC_COMMITTING 0x0010 /* File system underoing a fast
* commit.
*/
/*
* Misc. filesystem flags
@ -1613,6 +1642,30 @@ struct ext4_sb_info {
/* Record the errseq of the backing block device */
errseq_t s_bdev_wb_err;
spinlock_t s_bdev_wb_lock;
/* Ext4 fast commit stuff */
atomic_t s_fc_subtid;
atomic_t s_fc_ineligible_updates;
/*
* After commit starts, the main queue gets locked, and the further
* updates get added in the staging queue.
*/
#define FC_Q_MAIN 0
#define FC_Q_STAGING 1
struct list_head s_fc_q[2]; /* Inodes staged for fast commit
* that have data changes in them.
*/
struct list_head s_fc_dentry_q[2]; /* directory entry updates */
unsigned int s_fc_bytes;
/*
* Main fast commit lock. This lock protects accesses to the
* following fields:
* ei->i_fc_list, s_fc_dentry_q, s_fc_q, s_fc_bytes, s_fc_bh.
*/
spinlock_t s_fc_lock;
struct buffer_head *s_fc_bh;
struct ext4_fc_stats s_fc_stats;
u64 s_fc_avg_commit_time;
};
static inline struct ext4_sb_info *EXT4_SB(struct super_block *sb)
@ -1723,6 +1776,7 @@ enum {
EXT4_STATE_EXT_PRECACHED, /* extents have been precached */
EXT4_STATE_LUSTRE_EA_INODE, /* Lustre-style ea_inode */
EXT4_STATE_VERITY_IN_PROGRESS, /* building fs-verity Merkle tree */
EXT4_STATE_FC_COMMITTING, /* Fast commit ongoing */
};
#define EXT4_INODE_BIT_FNS(name, field, offset) \
@ -2682,6 +2736,22 @@ extern void ext4_end_bitmap_read(struct buffer_head *bh, int uptodate);
/* fast_commit.c */
void ext4_fc_init(struct super_block *sb, journal_t *journal);
void ext4_fc_init_inode(struct inode *inode);
void ext4_fc_track_range(struct inode *inode, ext4_lblk_t start,
ext4_lblk_t end);
void ext4_fc_track_unlink(struct inode *inode, struct dentry *dentry);
void ext4_fc_track_link(struct inode *inode, struct dentry *dentry);
void ext4_fc_track_create(struct inode *inode, struct dentry *dentry);
void ext4_fc_track_inode(struct inode *inode);
void ext4_fc_mark_ineligible(struct super_block *sb, int reason);
void ext4_fc_start_ineligible(struct super_block *sb, int reason);
void ext4_fc_stop_ineligible(struct super_block *sb);
void ext4_fc_start_update(struct inode *inode);
void ext4_fc_stop_update(struct inode *inode);
void ext4_fc_del(struct inode *inode);
int ext4_fc_commit(journal_t *journal, tid_t commit_tid);
int __init ext4_fc_init_dentry_cache(void);
/* mballoc.c */
extern const struct seq_operations ext4_mb_seq_groups_ops;
extern long ext4_mb_stats;

48
fs/ext4/extents.c
View File

@ -3723,6 +3723,7 @@ static int ext4_convert_unwritten_extents_endio(handle_t *handle,
err = ext4_ext_dirty(handle, inode, path + path->p_depth);
out:
ext4_ext_show_leaf(inode, path);
ext4_fc_track_range(inode, ee_block, ee_block + ee_len - 1);
return err;
}
@ -3794,6 +3795,7 @@ convert_initialized_extent(handle_t *handle, struct inode *inode,
if (*allocated > map->m_len)
*allocated = map->m_len;
map->m_len = *allocated;
ext4_fc_track_range(inode, ee_block, ee_block + ee_len - 1);
return 0;
}
@ -4327,7 +4329,7 @@ got_allocated_blocks:
map->m_len = ar.len;
allocated = map->m_len;
ext4_ext_show_leaf(inode, path);
ext4_fc_track_range(inode, map->m_lblk, map->m_lblk + map->m_len - 1);
out:
ext4_ext_drop_refs(path);
kfree(path);
@ -4600,7 +4602,8 @@ static long ext4_zero_range(struct file *file, loff_t offset,
ret = ext4_mark_inode_dirty(handle, inode);
if (unlikely(ret))
goto out_handle;
ext4_fc_track_range(inode, offset >> inode->i_sb->s_blocksize_bits,
(offset + len - 1) >> inode->i_sb->s_blocksize_bits);
/* Zero out partial block at the edges of the range */
ret = ext4_zero_partial_blocks(handle, inode, offset, len);
if (ret >= 0)
@ -4648,23 +4651,34 @@ long ext4_fallocate(struct file *file, int mode, loff_t offset, loff_t len)
FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_ZERO_RANGE |
FALLOC_FL_INSERT_RANGE))
return -EOPNOTSUPP;
ext4_fc_track_range(inode, offset >> blkbits,
(offset + len - 1) >> blkbits);
if (mode & FALLOC_FL_PUNCH_HOLE)
return ext4_punch_hole(inode, offset, len);
ext4_fc_start_update(inode);
if (mode & FALLOC_FL_PUNCH_HOLE) {
ret = ext4_punch_hole(inode, offset, len);
goto exit;
}
ret = ext4_convert_inline_data(inode);
if (ret)
return ret;
goto exit;
if (mode & FALLOC_FL_COLLAPSE_RANGE)
return ext4_collapse_range(inode, offset, len);
if (mode & FALLOC_FL_COLLAPSE_RANGE) {
ret = ext4_collapse_range(inode, offset, len);
goto exit;
}
if (mode & FALLOC_FL_INSERT_RANGE)
return ext4_insert_range(inode, offset, len);
if (mode & FALLOC_FL_ZERO_RANGE)
return ext4_zero_range(file, offset, len, mode);
if (mode & FALLOC_FL_INSERT_RANGE) {
ret = ext4_insert_range(inode, offset, len);
goto exit;
}
if (mode & FALLOC_FL_ZERO_RANGE) {
ret = ext4_zero_range(file, offset, len, mode);
goto exit;
}
trace_ext4_fallocate_enter(inode, offset, len, mode);
lblk = offset >> blkbits;
@ -4698,12 +4712,14 @@ long ext4_fallocate(struct file *file, int mode, loff_t offset, loff_t len)
goto out;
if (file->f_flags & O_SYNC && EXT4_SB(inode->i_sb)->s_journal) {
ret = jbd2_complete_transaction(EXT4_SB(inode->i_sb)->s_journal,
EXT4_I(inode)->i_sync_tid);
ret = ext4_fc_commit(EXT4_SB(inode->i_sb)->s_journal,
EXT4_I(inode)->i_sync_tid);
}
out:
inode_unlock(inode);
trace_ext4_fallocate_exit(inode, offset, max_blocks, ret);
exit:
ext4_fc_stop_update(inode);
return ret;
}
@ -5291,6 +5307,7 @@ static int ext4_collapse_range(struct inode *inode, loff_t offset, loff_t len)
ret = PTR_ERR(handle);
goto out_mmap;
}
ext4_fc_start_ineligible(sb, EXT4_FC_REASON_FALLOC_RANGE);
down_write(&EXT4_I(inode)->i_data_sem);
ext4_discard_preallocations(inode, 0);
@ -5329,6 +5346,7 @@ static int ext4_collapse_range(struct inode *inode, loff_t offset, loff_t len)
out_stop:
ext4_journal_stop(handle);
ext4_fc_stop_ineligible(sb);
out_mmap:
up_write(&EXT4_I(inode)->i_mmap_sem);
out_mutex:
@ -5429,6 +5447,7 @@ static int ext4_insert_range(struct inode *inode, loff_t offset, loff_t len)
ret = PTR_ERR(handle);
goto out_mmap;
}
ext4_fc_start_ineligible(sb, EXT4_FC_REASON_FALLOC_RANGE);
/* Expand file to avoid data loss if there is error while shifting */
inode->i_size += len;
@ -5503,6 +5522,7 @@ static int ext4_insert_range(struct inode *inode, loff_t offset, loff_t len)
out_stop:
ext4_journal_stop(handle);
ext4_fc_stop_ineligible(sb);
out_mmap:
up_write(&EXT4_I(inode)->i_mmap_sem);
out_mutex:

1183
fs/ext4/fast_commit.c
View File

File diff suppressed because it is too large Load Diff

110
fs/ext4/fast_commit.h
View File

@ -6,4 +6,114 @@
/* Number of blocks in journal area to allocate for fast commits */
#define EXT4_NUM_FC_BLKS 256
/* Fast commit tags */
#define EXT4_FC_TAG_ADD_RANGE 0x0001
#define EXT4_FC_TAG_DEL_RANGE 0x0002
#define EXT4_FC_TAG_CREAT 0x0003
#define EXT4_FC_TAG_LINK 0x0004
#define EXT4_FC_TAG_UNLINK 0x0005
#define EXT4_FC_TAG_INODE 0x0006
#define EXT4_FC_TAG_PAD 0x0007
#define EXT4_FC_TAG_TAIL 0x0008
#define EXT4_FC_TAG_HEAD 0x0009
#define EXT4_FC_SUPPORTED_FEATURES 0x0
/* On disk fast commit tlv value structures */
/* Fast commit on disk tag length structure */
struct ext4_fc_tl {
__le16 fc_tag;
__le16 fc_len;
};
/* Value structure for tag EXT4_FC_TAG_HEAD. */
struct ext4_fc_head {
__le32 fc_features;
__le32 fc_tid;
};
/* Value structure for EXT4_FC_TAG_ADD_RANGE. */
struct ext4_fc_add_range {
__le32 fc_ino;
__u8 fc_ex[12];
};
/* Value structure for tag EXT4_FC_TAG_DEL_RANGE. */
struct ext4_fc_del_range {
__le32 fc_ino;
__le32 fc_lblk;
__le32 fc_len;
};
/*
* This is the value structure for tags EXT4_FC_TAG_CREAT, EXT4_FC_TAG_LINK
* and EXT4_FC_TAG_UNLINK.
*/
struct ext4_fc_dentry_info {
__le32 fc_parent_ino;
__le32 fc_ino;
u8 fc_dname[0];
};
/* Value structure for EXT4_FC_TAG_INODE and EXT4_FC_TAG_INODE_PARTIAL. */
struct ext4_fc_inode {
__le32 fc_ino;
__u8 fc_raw_inode[0];
};
/* Value structure for tag EXT4_FC_TAG_TAIL. */
struct ext4_fc_tail {
__le32 fc_tid;
__le32 fc_crc;
};
/*
* In memory list of dentry updates that are performed on the file
* system used by fast commit code.
*/
struct ext4_fc_dentry_update {
int fcd_op; /* Type of update create / unlink / link */
int fcd_parent; /* Parent inode number */
int fcd_ino; /* Inode number */
struct qstr fcd_name; /* Dirent name */
unsigned char fcd_iname[DNAME_INLINE_LEN]; /* Dirent name string */
struct list_head fcd_list;
};
/*
* Fast commit reason codes
*/
enum {
/*
* Commit status codes:
*/
EXT4_FC_REASON_OK = 0,
EXT4_FC_REASON_INELIGIBLE,
EXT4_FC_REASON_ALREADY_COMMITTED,
EXT4_FC_REASON_FC_START_FAILED,
EXT4_FC_REASON_FC_FAILED,
/*
* Fast commit ineligiblity reasons:
*/
EXT4_FC_REASON_XATTR = 0,
EXT4_FC_REASON_CROSS_RENAME,
EXT4_FC_REASON_JOURNAL_FLAG_CHANGE,
EXT4_FC_REASON_MEM,
EXT4_FC_REASON_SWAP_BOOT,
EXT4_FC_REASON_RESIZE,
EXT4_FC_REASON_RENAME_DIR,
EXT4_FC_REASON_FALLOC_RANGE,
EXT4_FC_COMMIT_FAILED,
EXT4_FC_REASON_MAX
};
struct ext4_fc_stats {
unsigned int fc_ineligible_reason_count[EXT4_FC_REASON_MAX];
unsigned long fc_num_commits;
unsigned long fc_ineligible_commits;
unsigned long fc_numblks;
};
#endif /* __FAST_COMMIT_H__ */

10
fs/ext4/file.c
View File

@ -260,6 +260,7 @@ static ssize_t ext4_buffered_write_iter(struct kiocb *iocb,
if (iocb->ki_flags & IOCB_NOWAIT)
return -EOPNOTSUPP;
ext4_fc_start_update(inode);
inode_lock(inode);
ret = ext4_write_checks(iocb, from);
if (ret <= 0)
@ -271,6 +272,7 @@ static ssize_t ext4_buffered_write_iter(struct kiocb *iocb,
out:
inode_unlock(inode);
ext4_fc_stop_update(inode);
if (likely(ret > 0)) {
iocb->ki_pos += ret;
ret = generic_write_sync(iocb, ret);
@ -534,7 +536,9 @@ static ssize_t ext4_dio_write_iter(struct kiocb *iocb, struct iov_iter *from)
goto out;
}
ext4_fc_start_update(inode);
ret = ext4_orphan_add(handle, inode);
ext4_fc_stop_update(inode);
if (ret) {
ext4_journal_stop(handle);
goto out;
@ -656,8 +660,8 @@ ext4_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
#endif
if (iocb->ki_flags & IOCB_DIRECT)
return ext4_dio_write_iter(iocb, from);
return ext4_buffered_write_iter(iocb, from);
else
return ext4_buffered_write_iter(iocb, from);
}
#ifdef CONFIG_FS_DAX
@ -757,6 +761,7 @@ static int ext4_file_mmap(struct file *file, struct vm_area_struct *vma)
if (!daxdev_mapping_supported(vma, dax_dev))
return -EOPNOTSUPP;
ext4_fc_start_update(inode);
file_accessed(file);
if (IS_DAX(file_inode(file))) {
vma->vm_ops = &ext4_dax_vm_ops;
@ -764,6 +769,7 @@ static int ext4_file_mmap(struct file *file, struct vm_area_struct *vma)
} else {
vma->vm_ops = &ext4_file_vm_ops;
}
ext4_fc_stop_update(inode);
return 0;
}

2
fs/ext4/fsync.c
View File

@ -112,7 +112,7 @@ static int ext4_fsync_journal(struct inode *inode, bool datasync,
!jbd2_trans_will_send_data_barrier(journal, commit_tid))
*needs_barrier = true;
return jbd2_complete_transaction(journal, commit_tid);
return ext4_fc_commit(journal, commit_tid);
}
/*

52
fs/ext4/inode.c
View File

@ -729,6 +729,8 @@ out_sem:
if (ret)
return ret;
}
ext4_fc_track_range(inode, map->m_lblk,
map->m_lblk + map->m_len - 1);
}
if (retval < 0)
@ -3300,9 +3302,14 @@ static bool ext4_inode_datasync_dirty(struct inode *inode)
{
journal_t *journal = EXT4_SB(inode->i_sb)->s_journal;
if (journal)
return !jbd2_transaction_committed(journal,
EXT4_I(inode)->i_datasync_tid);
if (journal) {
if (jbd2_transaction_committed(journal,
EXT4_I(inode)->i_datasync_tid))
return true;
return atomic_read(&EXT4_SB(inode->i_sb)->s_fc_subtid) >=
EXT4_I(inode)->i_fc_committed_subtid;
}
/* Any metadata buffers to write? */
if (!list_empty(&inode->i_mapping->private_list))
return true;
@ -4097,6 +4104,7 @@ int ext4_punch_hole(struct inode *inode, loff_t offset, loff_t length)
up_write(&EXT4_I(inode)->i_data_sem);
}
ext4_fc_track_range(inode, first_block, stop_block);
if (IS_SYNC(inode))
ext4_handle_sync(handle);
@ -4716,6 +4724,7 @@ struct inode *__ext4_iget(struct super_block *sb, unsigned long ino,
for (block = 0; block < EXT4_N_BLOCKS; block++)
ei->i_data[block] = raw_inode->i_block[block];
INIT_LIST_HEAD(&ei->i_orphan);
ext4_fc_init_inode(&ei->vfs_inode);
/*
* Set transaction id's of transactions that have to be committed
@ -5162,7 +5171,7 @@ int ext4_write_inode(struct inode *inode, struct writeback_control *wbc)
if (wbc->sync_mode != WB_SYNC_ALL || wbc->for_sync)
return 0;
err = jbd2_complete_transaction(EXT4_SB(inode->i_sb)->s_journal,
err = ext4_fc_commit(EXT4_SB(inode->i_sb)->s_journal,
EXT4_I(inode)->i_sync_tid);
} else {
struct ext4_iloc iloc;
@ -5291,6 +5300,7 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
if (error)
return error;
}
ext4_fc_start_update(inode);
if ((ia_valid & ATTR_UID && !uid_eq(attr->ia_uid, inode->i_uid)) ||
(ia_valid & ATTR_GID && !gid_eq(attr->ia_gid, inode->i_gid))) {
handle_t *handle;
@ -5314,6 +5324,7 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
if (error) {
ext4_journal_stop(handle);
ext4_fc_stop_update(inode);
return error;
}
/* Update corresponding info in inode so that everything is in
@ -5336,11 +5347,15 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))) {
struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
if (attr->ia_size > sbi->s_bitmap_maxbytes)
if (attr->ia_size > sbi->s_bitmap_maxbytes) {
ext4_fc_stop_update(inode);
return -EFBIG;
}
}
if (!S_ISREG(inode->i_mode))
if (!S_ISREG(inode->i_mode)) {
ext4_fc_stop_update(inode);
return -EINVAL;
}
if (IS_I_VERSION(inode) && attr->ia_size != inode->i_size)
inode_inc_iversion(inode);
@ -5364,7 +5379,7 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
rc = ext4_break_layouts(inode);
if (rc) {
up_write(&EXT4_I(inode)->i_mmap_sem);
return rc;
goto err_out;
}
if (attr->ia_size != inode->i_size) {
@ -5385,6 +5400,21 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
inode->i_mtime = current_time(inode);
inode->i_ctime = inode->i_mtime;
}
if (shrink)
ext4_fc_track_range(inode,
(attr->ia_size > 0 ? attr->ia_size - 1 : 0) >>
inode->i_sb->s_blocksize_bits,
(oldsize > 0 ? oldsize - 1 : 0) >>
inode->i_sb->s_blocksize_bits);
else
ext4_fc_track_range(
inode,
(oldsize > 0 ? oldsize - 1 : oldsize) >>
inode->i_sb->s_blocksize_bits,
(attr->ia_size > 0 ? attr->ia_size - 1 : 0) >>
inode->i_sb->s_blocksize_bits);
down_write(&EXT4_I(inode)->i_data_sem);
EXT4_I(inode)->i_disksize = attr->ia_size;
rc = ext4_mark_inode_dirty(handle, inode);
@ -5443,9 +5473,11 @@ out_mmap_sem:
rc = posix_acl_chmod(inode, inode->i_mode);
err_out:
ext4_std_error(inode->i_sb, error);
if (error)
ext4_std_error(inode->i_sb, error);
if (!error)
error = rc;
ext4_fc_stop_update(inode);
return error;
}
@ -5627,6 +5659,8 @@ int ext4_mark_iloc_dirty(handle_t *handle,
put_bh(iloc->bh);
return -EIO;
}
ext4_fc_track_inode(inode);
if (IS_I_VERSION(inode))
inode_inc_iversion(inode);
@ -5950,6 +5984,8 @@ int ext4_change_inode_journal_flag(struct inode *inode, int val)
if (IS_ERR(handle))
return PTR_ERR(handle);
ext4_fc_mark_ineligible(inode->i_sb,
EXT4_FC_REASON_JOURNAL_FLAG_CHANGE);
err = ext4_mark_inode_dirty(handle, inode);
ext4_handle_sync(handle);
ext4_journal_stop(handle);

16
fs/ext4/ioctl.c
View File

@ -165,6 +165,7 @@ static long swap_inode_boot_loader(struct super_block *sb,
err = -EINVAL;
goto err_out;
}
ext4_fc_start_ineligible(sb, EXT4_FC_REASON_SWAP_BOOT);
/* Protect extent tree against block allocations via delalloc */
ext4_double_down_write_data_sem(inode, inode_bl);
@ -247,6 +248,7 @@ revert:
err_out1:
ext4_journal_stop(handle);
ext4_fc_stop_ineligible(sb);
ext4_double_up_write_data_sem(inode, inode_bl);
err_out:
@ -807,7 +809,7 @@ static int ext4_ioctl_get_es_cache(struct file *filp, unsigned long arg)
return error;
}
long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
static long __ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
struct inode *inode = file_inode(filp);
struct super_block *sb = inode->i_sb;
@ -1074,6 +1076,7 @@ mext_out:
err = ext4_resize_fs(sb, n_blocks_count);
if (EXT4_SB(sb)->s_journal) {
ext4_fc_mark_ineligible(sb, EXT4_FC_REASON_RESIZE);
jbd2_journal_lock_updates(EXT4_SB(sb)->s_journal);
err2 = jbd2_journal_flush(EXT4_SB(sb)->s_journal);
jbd2_journal_unlock_updates(EXT4_SB(sb)->s_journal);
@ -1308,6 +1311,17 @@ out:
}
}
long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
long ret;
ext4_fc_start_update(file_inode(filp));
ret = __ext4_ioctl(filp, cmd, arg);
ext4_fc_stop_update(file_inode(filp));
return ret;
}
#ifdef CONFIG_COMPAT
long ext4_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
{

37
fs/ext4/namei.c
View File

@ -2611,7 +2611,7 @@ static int ext4_create(struct inode *dir, struct dentry *dentry, umode_t mode,
bool excl)
{
handle_t *handle;
struct inode *inode;
struct inode *inode, *inode_save;
int err, credits, retries = 0;
err = dquot_initialize(dir);
@ -2629,7 +2629,11 @@ retry:
inode->i_op = &ext4_file_inode_operations;
inode->i_fop = &ext4_file_operations;
ext4_set_aops(inode);
inode_save = inode;
ihold(inode_save);
err = ext4_add_nondir(handle, dentry, &inode);
ext4_fc_track_create(inode_save, dentry);
iput(inode_save);
}
if (handle)
ext4_journal_stop(handle);
@ -2644,7 +2648,7 @@ static int ext4_mknod(struct inode *dir, struct dentry *dentry,
umode_t mode, dev_t rdev)
{
handle_t *handle;
struct inode *inode;
struct inode *inode, *inode_save;
int err, credits, retries = 0;
err = dquot_initialize(dir);
@ -2661,7 +2665,12 @@ retry:
if (!IS_ERR(inode)) {
init_special_inode(inode, inode->i_mode, rdev);
inode->i_op = &ext4_special_inode_operations;
inode_save = inode;
ihold(inode_save);
err = ext4_add_nondir(handle, dentry, &inode);
if (!err)
ext4_fc_track_create(inode_save, dentry);
iput(inode_save);
}
if (handle)
ext4_journal_stop(handle);
@ -2825,7 +2834,9 @@ out_clear_inode:
iput(inode);
goto out_retry;
}
ext4_fc_track_create(inode, dentry);
ext4_inc_count(dir);
ext4_update_dx_flag(dir);
err = ext4_mark_inode_dirty(handle, dir);
if (err)
@ -3165,6 +3176,7 @@ static int ext4_rmdir(struct inode *dir, struct dentry *dentry)
goto end_rmdir;
ext4_dec_count(dir);
ext4_update_dx_flag(dir);
ext4_fc_track_unlink(inode, dentry);
retval = ext4_mark_inode_dirty(handle, dir);
#ifdef CONFIG_UNICODE
@ -3251,6 +3263,8 @@ static int ext4_unlink(struct inode *dir, struct dentry *dentry)
inode->i_ctime = current_time(inode);
retval = ext4_mark_inode_dirty(handle, inode);
if (!retval)
ext4_fc_track_unlink(d_inode(dentry), dentry);
#ifdef CONFIG_UNICODE
/* VFS negative dentries are incompatible with Encoding and
* Case-insensitiveness. Eventually we'll want avoid
@ -3872,6 +3886,22 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry,
retval = ext4_mark_inode_dirty(handle, old.dir);
if (unlikely(retval))
goto end_rename;
if (S_ISDIR(old.inode->i_mode)) {
/*
* We disable fast commits here that's because the
* replay code is not yet capable of changing dot dot
* dirents in directories.
*/
ext4_fc_mark_ineligible(old.inode->i_sb,
EXT4_FC_REASON_RENAME_DIR);
} else {
if (new.inode)
ext4_fc_track_unlink(new.inode, new.dentry);
ext4_fc_track_link(old.inode, new.dentry);
ext4_fc_track_unlink(old.inode, old.dentry);
}
if (new.inode) {
retval = ext4_mark_inode_dirty(handle, new.inode);
if (unlikely(retval))
@ -4015,7 +4045,8 @@ static int ext4_cross_rename(struct inode *old_dir, struct dentry *old_dentry,
retval = ext4_mark_inode_dirty(handle, new.inode);
if (unlikely(retval))
goto end_rename;
ext4_fc_mark_ineligible(new.inode->i_sb,
EXT4_FC_REASON_CROSS_RENAME);
if (old.dir_bh) {
retval = ext4_rename_dir_finish(handle, &old, new.dir->i_ino);
if (retval)

31
fs/ext4/super.c
View File

@ -1331,6 +1331,8 @@ static struct inode *ext4_alloc_inode(struct super_block *sb)
ei->i_datasync_tid = 0;
atomic_set(&ei->i_unwritten, 0);
INIT_WORK(&ei->i_rsv_conversion_work, ext4_end_io_rsv_work);
ext4_fc_init_inode(&ei->vfs_inode);
mutex_init(&ei->i_fc_lock);
return &ei->vfs_inode;
}
@ -1348,6 +1350,10 @@ static int ext4_drop_inode(struct inode *inode)
static void ext4_free_in_core_inode(struct inode *inode)
{
fscrypt_free_inode(inode);
if (!list_empty(&(EXT4_I(inode)->i_fc_list))) {
pr_warn("%s: inode %ld still in fc list",
__func__, inode->i_ino);
}
kmem_cache_free(ext4_inode_cachep, EXT4_I(inode));
}
@ -1373,6 +1379,7 @@ static void init_once(void *foo)
init_rwsem(&ei->i_data_sem);
init_rwsem(&ei->i_mmap_sem);
inode_init_once(&ei->vfs_inode);
ext4_fc_init_inode(&ei->vfs_inode);
}
static int __init init_inodecache(void)
@ -1401,6 +1408,7 @@ static void destroy_inodecache(void)
void ext4_clear_inode(struct inode *inode)
{
ext4_fc_del(inode);
invalidate_inode_buffers(inode);
clear_inode(inode);
ext4_discard_preallocations(inode, 0);
@ -4744,6 +4752,19 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
INIT_LIST_HEAD(&sbi->s_orphan); /* unlinked but open files */
mutex_init(&sbi->s_orphan_lock);
/* Initialize fast commit stuff */
atomic_set(&sbi->s_fc_subtid, 0);
atomic_set(&sbi->s_fc_ineligible_updates, 0);
INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_MAIN]);
INIT_LIST_HEAD(&sbi->s_fc_q[FC_Q_STAGING]);
INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_MAIN]);
INIT_LIST_HEAD(&sbi->s_fc_dentry_q[FC_Q_STAGING]);
sbi->s_fc_bytes = 0;
sbi->s_mount_state &= ~EXT4_FC_INELIGIBLE;
sbi->s_mount_state &= ~EXT4_FC_COMMITTING;
spin_lock_init(&sbi->s_fc_lock);
memset(&sbi->s_fc_stats, 0, sizeof(sbi->s_fc_stats));
sb->s_root = NULL;
needs_recovery = (es->s_last_orphan != 0 ||
@ -6515,6 +6536,10 @@ static ssize_t ext4_quota_write(struct super_block *sb, int type,
brelse(bh);
out:
if (inode->i_size < off + len) {
ext4_fc_track_range(inode,
(inode->i_size > 0 ? inode->i_size - 1 : 0)
>> inode->i_sb->s_blocksize_bits,
(off + len) >> inode->i_sb->s_blocksize_bits);
i_size_write(inode, off + len);
EXT4_I(inode)->i_disksize = inode->i_size;
err2 = ext4_mark_inode_dirty(handle, inode);
@ -6643,6 +6668,11 @@ static int __init ext4_init_fs(void)
err = init_inodecache();
if (err)
goto out1;
err = ext4_fc_init_dentry_cache();
if (err)
goto out05;
register_as_ext3();
register_as_ext2();
err = register_filesystem(&ext4_fs_type);
@ -6653,6 +6683,7 @@ static int __init ext4_init_fs(void)
out:
unregister_as_ext2();
unregister_as_ext3();
out05:
destroy_inodecache();
out1:
ext4_exit_mballoc();

3
fs/ext4/xattr.c
View File

@ -2419,6 +2419,7 @@ retry_inode:
if (IS_SYNC(inode))
ext4_handle_sync(handle);
}
ext4_fc_mark_ineligible(inode->i_sb, EXT4_FC_REASON_XATTR);
cleanup:
brelse(is.iloc.bh);
@ -2496,6 +2497,7 @@ retry:
if (error == 0)
error = error2;
}
ext4_fc_mark_ineligible(inode->i_sb, EXT4_FC_REASON_XATTR);
return error;
}
@ -2928,6 +2930,7 @@ int ext4_xattr_delete_inode(handle_t *handle, struct inode *inode,
error);
goto cleanup;
}
ext4_fc_mark_ineligible(inode->i_sb, EXT4_FC_REASON_XATTR);
}
error = 0;
cleanup:

172
include/trace/events/ext4.h
View File

@ -95,6 +95,16 @@ TRACE_DEFINE_ENUM(ES_REFERENCED_B);
{ FALLOC_FL_COLLAPSE_RANGE, "COLLAPSE_RANGE"}, \
{ FALLOC_FL_ZERO_RANGE, "ZERO_RANGE"})
#define show_fc_reason(reason) \
__print_symbolic(reason, \
{ EXT4_FC_REASON_XATTR, "XATTR"}, \
{ EXT4_FC_REASON_CROSS_RENAME, "CROSS_RENAME"}, \
{ EXT4_FC_REASON_JOURNAL_FLAG_CHANGE, "JOURNAL_FLAG_CHANGE"}, \
{ EXT4_FC_REASON_MEM, "NO_MEM"}, \
{ EXT4_FC_REASON_SWAP_BOOT, "SWAP_BOOT"}, \
{ EXT4_FC_REASON_RESIZE, "RESIZE"}, \
{ EXT4_FC_REASON_RENAME_DIR, "RENAME_DIR"}, \
{ EXT4_FC_REASON_FALLOC_RANGE, "FALLOC_RANGE"})
TRACE_EVENT(ext4_other_inode_update_time,
TP_PROTO(struct inode *inode, ino_t orig_ino),
@ -2791,6 +2801,168 @@ TRACE_EVENT(ext4_lazy_itable_init,
MAJOR(__entry->dev), MINOR(__entry->dev), __entry->group)
);
TRACE_EVENT(ext4_fc_commit_start,
TP_PROTO(struct super_block *sb),
TP_ARGS(sb),
TP_STRUCT__entry(
__field(dev_t, dev)
),
TP_fast_assign(
__entry->dev = sb->s_dev;
),
TP_printk("fast_commit started on dev %d,%d",
MAJOR(__entry->dev), MINOR(__entry->dev))
);
TRACE_EVENT(ext4_fc_commit_stop,
TP_PROTO(struct super_block *sb, int nblks, int reason),
TP_ARGS(sb, nblks, reason),
TP_STRUCT__entry(
__field(dev_t, dev)
__field(int, nblks)
__field(int, reason)
__field(int, num_fc)
__field(int, num_fc_ineligible)
__field(int, nblks_agg)
),
TP_fast_assign(
__entry->dev = sb->s_dev;
__entry->nblks = nblks;
__entry->reason = reason;
__entry->num_fc = EXT4_SB(sb)->s_fc_stats.fc_num_commits;
__entry->num_fc_ineligible =
EXT4_SB(sb)->s_fc_stats.fc_ineligible_commits;
__entry->nblks_agg = EXT4_SB(sb)->s_fc_stats.fc_numblks;
),
TP_printk("fc on [%d,%d] nblks %d, reason %d, fc = %d, ineligible = %d, agg_nblks %d",
MAJOR(__entry->dev), MINOR(__entry->dev),
__entry->nblks, __entry->reason, __entry->num_fc,
__entry->num_fc_ineligible, __entry->nblks_agg)
);
#define FC_REASON_NAME_STAT(reason) \
show_fc_reason(reason), \
__entry->sbi->s_fc_stats.fc_ineligible_reason_count[reason]
TRACE_EVENT(ext4_fc_stats,
TP_PROTO(struct super_block *sb),
TP_ARGS(sb),
TP_STRUCT__entry(
__field(dev_t, dev)
__field(struct ext4_sb_info *, sbi)
__field(int, count)
),
TP_fast_assign(
__entry->dev = sb->s_dev;
__entry->sbi = EXT4_SB(sb);
),
TP_printk("dev %d:%d fc ineligible reasons:\n"
"%s:%d, %s:%d, %s:%d, %s:%d, %s:%d, %s:%d, %s:%d, %s,%d; "
"num_commits:%ld, ineligible: %ld, numblks: %ld",
MAJOR(__entry->dev), MINOR(__entry->dev),
FC_REASON_NAME_STAT(EXT4_FC_REASON_XATTR),
FC_REASON_NAME_STAT(EXT4_FC_REASON_CROSS_RENAME),
FC_REASON_NAME_STAT(EXT4_FC_REASON_JOURNAL_FLAG_CHANGE),
FC_REASON_NAME_STAT(EXT4_FC_REASON_MEM),
FC_REASON_NAME_STAT(EXT4_FC_REASON_SWAP_BOOT),
FC_REASON_NAME_STAT(EXT4_FC_REASON_RESIZE),
FC_REASON_NAME_STAT(EXT4_FC_REASON_RENAME_DIR),
FC_REASON_NAME_STAT(EXT4_FC_REASON_FALLOC_RANGE),
__entry->sbi->s_fc_stats.fc_num_commits,
__entry->sbi->s_fc_stats.fc_ineligible_commits,
__entry->sbi->s_fc_stats.fc_numblks)
);
#define DEFINE_TRACE_DENTRY_EVENT(__type) \
TRACE_EVENT(ext4_fc_track_##__type, \
TP_PROTO(struct inode *inode, struct dentry *dentry, int ret), \
\
TP_ARGS(inode, dentry, ret), \
\
TP_STRUCT__entry( \
__field(dev_t, dev) \
__field(int, ino) \
__field(int, error) \
), \
\
TP_fast_assign( \
__entry->dev = inode->i_sb->s_dev; \
__entry->ino = inode->i_ino; \
__entry->error = ret; \
), \
\
TP_printk("dev %d:%d, inode %d, error %d, fc_%s", \
MAJOR(__entry->dev), MINOR(__entry->dev), \
__entry->ino, __entry->error, \
#__type) \
)
DEFINE_TRACE_DENTRY_EVENT(create);
DEFINE_TRACE_DENTRY_EVENT(link);
DEFINE_TRACE_DENTRY_EVENT(unlink);
TRACE_EVENT(ext4_fc_track_inode,
TP_PROTO(struct inode *inode, int ret),
TP_ARGS(inode, ret),
TP_STRUCT__entry(
__field(dev_t, dev)
__field(int, ino)
__field(int, error)
),
TP_fast_assign(
__entry->dev = inode->i_sb->s_dev;
__entry->ino = inode->i_ino;
__entry->error = ret;
),
TP_printk("dev %d:%d, inode %d, error %d",
MAJOR(__entry->dev), MINOR(__entry->dev),
__entry->ino, __entry->error)
);
TRACE_EVENT(ext4_fc_track_range,
TP_PROTO(struct inode *inode, long start, long end, int ret),
TP_ARGS(inode, start, end, ret),
TP_STRUCT__entry(
__field(dev_t, dev)
__field(int, ino)
__field(long, start)
__field(long, end)
__field(int, error)
),
TP_fast_assign(
__entry->dev = inode->i_sb->s_dev;
__entry->ino = inode->i_ino;
__entry->start = start;
__entry->end = end;
__entry->error = ret;
),
TP_printk("dev %d:%d, inode %d, error %d, start %ld, end %ld",
MAJOR(__entry->dev), MINOR(__entry->dev),
__entry->ino, __entry->error, __entry->start,
__entry->end)
);
#endif /* _TRACE_EXT4_H */
/* This part must be outside protection */