Commit a80f7fcf authored by Harshad Shirwadkar's avatar Harshad Shirwadkar Committed by Theodore Ts'o
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ext4: fixup ext4_fc_track_* functions' signature 



Firstly, pass handle to all ext4_fc_track_* functions and use
transaction id found in handle->h_transaction->h_tid for tracking fast
commit updates. Secondly, don't pass inode to
ext4_fc_track_link/create/unlink functions. inode can be found inside
these functions as d_inode(dentry). However, rename path is an
exeception. That's because in that case, we need inode that's not same
as d_inode(dentry). To handle that, add a couple of low-level wrapper
functions that take inode and dentry as arguments.

Suggested-by: default avatarJan Kara <jack@suse.cz>
Signed-off-by: default avatarHarshad Shirwadkar <harshadshirwadkar@gmail.com>
Link: https://lore.kernel.org/r/20201106035911.1942128-5-harshadshirwadkar@gmail.com


Signed-off-by: default avatarTheodore Ts'o <tytso@mit.edu>
parent 5b552ad7

fs/ext4/ext4.h

+10 −6
Original line number Diff line number Diff line
@@ -2738,12 +2738,16 @@ extern void ext4_end_bitmap_read(struct buffer_head *bh, int uptodate); 
int ext4_fc_info_show(struct seq_file *seq, void *v);

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,

void ext4_fc_track_range(handle_t *handle, 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_track_unlink(handle_t *handle, struct inode *inode,

	struct dentry *dentry);

void __ext4_fc_track_link(handle_t *handle, struct inode *inode,

	struct dentry *dentry);

void ext4_fc_track_unlink(handle_t *handle, struct dentry *dentry);

void ext4_fc_track_link(handle_t *handle, struct dentry *dentry);

void ext4_fc_track_create(handle_t *handle, struct dentry *dentry);

void ext4_fc_track_inode(handle_t *handle, 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);
@@ -3459,7 +3463,7 @@ extern int ext4_handle_dirty_dirblock(handle_t *handle, struct inode *inode, 
extern int ext4_ci_compare(const struct inode *parent,

			   const struct qstr *fname,

			   const struct qstr *entry, bool quick);

extern int __ext4_unlink(struct inode *dir, const struct qstr *d_name,

extern int __ext4_unlink(handle_t *handle, struct inode *dir, const struct qstr *d_name,

			 struct inode *inode);

extern int __ext4_link(struct inode *dir, struct inode *inode,

		       struct dentry *dentry);

fs/ext4/extents.c

+1 −1
Original line number Diff line number Diff line
@@ -4599,7 +4599,7 @@ 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,

	ext4_fc_track_range(handle, 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);

fs/ext4/fast_commit.c

+30 −18
Original line number Diff line number Diff line
@@ -323,13 +323,14 @@ static inline int ext4_fc_is_ineligible(struct super_block *sb) 
 * If enqueue is set, this function enqueues the inode in fast commit list.

 */

static int ext4_fc_track_template(

	struct inode *inode, int (*__fc_track_fn)(struct inode *, void *, bool),

	handle_t *handle, struct inode *inode,

	int (*__fc_track_fn)(struct inode *, void *, bool),

	void *args, int enqueue)

{

	tid_t running_txn_tid;

	bool update = false;

	struct ext4_inode_info *ei = EXT4_I(inode);

	struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);

	tid_t tid = 0;

	int ret;



	if (!test_opt2(inode->i_sb, JOURNAL_FAST_COMMIT) ||
@@ -339,15 +340,13 @@ static int ext4_fc_track_template( 
	if (ext4_fc_is_ineligible(inode->i_sb))

		return -EINVAL;



	running_txn_tid = sbi->s_journal ?

		sbi->s_journal->j_commit_sequence + 1 : 0;



	tid = handle->h_transaction->t_tid;

	mutex_lock(&ei->i_fc_lock);

	if (running_txn_tid == ei->i_sync_tid) {

	if (tid == ei->i_sync_tid) {

		update = true;

	} else {

		ext4_fc_reset_inode(inode);

		ei->i_sync_tid = running_txn_tid;

		ei->i_sync_tid = tid;

	}

	ret = __fc_track_fn(inode, args, update);

	mutex_unlock(&ei->i_fc_lock);
@@ -422,7 +421,8 @@ static int __track_dentry_update(struct inode *inode, void *arg, bool update) 
	return 0;

}



void ext4_fc_track_unlink(struct inode *inode, struct dentry *dentry)

void __ext4_fc_track_unlink(handle_t *handle,

		struct inode *inode, struct dentry *dentry)

{

	struct __track_dentry_update_args args;

	int ret;
@@ -430,12 +430,18 @@ void ext4_fc_track_unlink(struct inode *inode, struct dentry *dentry) 
	args.dentry = dentry;

	args.op = EXT4_FC_TAG_UNLINK;



	ret = ext4_fc_track_template(inode, __track_dentry_update,

	ret = ext4_fc_track_template(handle, inode, __track_dentry_update,

					(void *)&args, 0);

	trace_ext4_fc_track_unlink(inode, dentry, ret);

}



void ext4_fc_track_link(struct inode *inode, struct dentry *dentry)

void ext4_fc_track_unlink(handle_t *handle, struct dentry *dentry)

{

	__ext4_fc_track_unlink(handle, d_inode(dentry), dentry);

}



void __ext4_fc_track_link(handle_t *handle,

	struct inode *inode, struct dentry *dentry)

{

	struct __track_dentry_update_args args;

	int ret;
@@ -443,20 +449,26 @@ void ext4_fc_track_link(struct inode *inode, struct dentry *dentry) 
	args.dentry = dentry;

	args.op = EXT4_FC_TAG_LINK;



	ret = ext4_fc_track_template(inode, __track_dentry_update,

	ret = ext4_fc_track_template(handle, inode, __track_dentry_update,

					(void *)&args, 0);

	trace_ext4_fc_track_link(inode, dentry, ret);

}



void ext4_fc_track_create(struct inode *inode, struct dentry *dentry)

void ext4_fc_track_link(handle_t *handle, struct dentry *dentry)

{

	__ext4_fc_track_link(handle, d_inode(dentry), dentry);

}



void ext4_fc_track_create(handle_t *handle, struct dentry *dentry)

{

	struct __track_dentry_update_args args;

	struct inode *inode = d_inode(dentry);

	int ret;



	args.dentry = dentry;

	args.op = EXT4_FC_TAG_CREAT;



	ret = ext4_fc_track_template(inode, __track_dentry_update,

	ret = ext4_fc_track_template(handle, inode, __track_dentry_update,

					(void *)&args, 0);

	trace_ext4_fc_track_create(inode, dentry, ret);

}
@@ -472,14 +484,14 @@ static int __track_inode(struct inode *inode, void *arg, bool update) 
	return 0;

}



void ext4_fc_track_inode(struct inode *inode)

void ext4_fc_track_inode(handle_t *handle, struct inode *inode)

{

	int ret;



	if (S_ISDIR(inode->i_mode))

		return;



	ret = ext4_fc_track_template(inode, __track_inode, NULL, 1);

	ret = ext4_fc_track_template(handle, inode, __track_inode, NULL, 1);

	trace_ext4_fc_track_inode(inode, ret);

}
@@ -515,7 +527,7 @@ static int __track_range(struct inode *inode, void *arg, bool update) 
	return 0;

}



void ext4_fc_track_range(struct inode *inode, ext4_lblk_t start,

void ext4_fc_track_range(handle_t *handle, struct inode *inode, ext4_lblk_t start,

			 ext4_lblk_t end)

{

	struct __track_range_args args;
@@ -527,7 +539,7 @@ void ext4_fc_track_range(struct inode *inode, ext4_lblk_t start, 
	args.start = start;

	args.end = end;



	ret = ext4_fc_track_template(inode,  __track_range, &args, 1);

	ret = ext4_fc_track_template(handle, inode,  __track_range, &args, 1);



	trace_ext4_fc_track_range(inode, start, end, ret);

}
@@ -1263,7 +1275,7 @@ static int ext4_fc_replay_unlink(struct super_block *sb, struct ext4_fc_tl *tl) 
		return 0;

	}



	ret = __ext4_unlink(old_parent, &entry, inode);

	ret = __ext4_unlink(NULL, old_parent, &entry, inode);

	/* -ENOENT ok coz it might not exist anymore. */

	if (ret == -ENOENT)

		ret = 0;

fs/ext4/inode.c

+5 −5
Original line number Diff line number Diff line
@@ -732,7 +732,7 @@ out_sem: 
			if (ret)

				return ret;

		}

		ext4_fc_track_range(inode, map->m_lblk,

		ext4_fc_track_range(handle, inode, map->m_lblk,

			    map->m_lblk + map->m_len - 1);

	}
@@ -4111,7 +4111,7 @@ 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);

	ext4_fc_track_range(handle, inode, first_block, stop_block);

	if (IS_SYNC(inode))

		ext4_handle_sync(handle);
@@ -5444,14 +5444,14 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr) 
			}



			if (shrink)

				ext4_fc_track_range(inode,

				ext4_fc_track_range(handle, 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,

					handle, inode,

					(oldsize > 0 ? oldsize - 1 : oldsize) >>

					inode->i_sb->s_blocksize_bits,

					(attr->ia_size > 0 ? attr->ia_size - 1 : 0) >>
@@ -5701,7 +5701,7 @@ int ext4_mark_iloc_dirty(handle_t *handle, 
		put_bh(iloc->bh);

		return -EIO;

	}

	ext4_fc_track_inode(inode);

	ext4_fc_track_inode(handle, inode);



	if (IS_I_VERSION(inode))

		inode_inc_iversion(inode);

fs/ext4/namei.c

+28 −33
Original line number Diff line number Diff line
@@ -2606,7 +2606,7 @@ static int ext4_create(struct inode *dir, struct dentry *dentry, umode_t mode, 
		       bool excl)

{

	handle_t *handle;

	struct inode *inode, *inode_save;

	struct inode *inode;

	int err, credits, retries = 0;



	err = dquot_initialize(dir);
@@ -2624,11 +2624,9 @@ 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 (!err)

			ext4_fc_track_create(handle, dentry);

	}

	if (handle)

		ext4_journal_stop(handle);
@@ -2643,7 +2641,7 @@ static int ext4_mknod(struct inode *dir, struct dentry *dentry, 
		      umode_t mode, dev_t rdev)

{

	handle_t *handle;

	struct inode *inode, *inode_save;

	struct inode *inode;

	int err, credits, retries = 0;



	err = dquot_initialize(dir);
@@ -2660,12 +2658,9 @@ 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);

			ext4_fc_track_create(handle, dentry);

	}

	if (handle)

		ext4_journal_stop(handle);
@@ -2829,7 +2824,6 @@ out_clear_inode: 
		iput(inode);

		goto out_retry;

	}

	ext4_fc_track_create(inode, dentry);

	ext4_inc_count(dir);



	ext4_update_dx_flag(dir);
@@ -2837,6 +2831,7 @@ out_clear_inode: 
	if (err)

		goto out_clear_inode;

	d_instantiate_new(dentry, inode);

	ext4_fc_track_create(handle, dentry);

	if (IS_DIRSYNC(dir))

		ext4_handle_sync(handle);
@@ -3171,7 +3166,7 @@ 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);

	ext4_fc_track_unlink(handle, dentry);

	retval = ext4_mark_inode_dirty(handle, dir);



#ifdef CONFIG_UNICODE
@@ -3192,13 +3187,12 @@ end_rmdir: 
	return retval;

}



int __ext4_unlink(struct inode *dir, const struct qstr *d_name,

int __ext4_unlink(handle_t *handle, struct inode *dir, const struct qstr *d_name,

		  struct inode *inode)

{

	int retval = -ENOENT;

	struct buffer_head *bh;

	struct ext4_dir_entry_2 *de;

	handle_t *handle = NULL;

	int skip_remove_dentry = 0;



	bh = ext4_find_entry(dir, d_name, &de, NULL);
@@ -3217,14 +3211,7 @@ int __ext4_unlink(struct inode *dir, const struct qstr *d_name, 
		if (EXT4_SB(inode->i_sb)->s_mount_state & EXT4_FC_REPLAY)

			skip_remove_dentry = 1;

		else

			goto out_bh;

	}



	handle = ext4_journal_start(dir, EXT4_HT_DIR,

				    EXT4_DATA_TRANS_BLOCKS(dir->i_sb));

	if (IS_ERR(handle)) {

		retval = PTR_ERR(handle);

		goto out_bh;

			goto out;

	}



	if (IS_DIRSYNC(dir))
@@ -3233,12 +3220,12 @@ int __ext4_unlink(struct inode *dir, const struct qstr *d_name, 
	if (!skip_remove_dentry) {

		retval = ext4_delete_entry(handle, dir, de, bh);

		if (retval)

			goto out_handle;

			goto out;

		dir->i_ctime = dir->i_mtime = current_time(dir);

		ext4_update_dx_flag(dir);

		retval = ext4_mark_inode_dirty(handle, dir);

		if (retval)

			goto out_handle;

			goto out;

	} else {

		retval = 0;

	}
@@ -3252,15 +3239,14 @@ int __ext4_unlink(struct inode *dir, const struct qstr *d_name, 
	inode->i_ctime = current_time(inode);

	retval = ext4_mark_inode_dirty(handle, inode);



out_handle:

	ext4_journal_stop(handle);

out_bh:

out:

	brelse(bh);

	return retval;

}



static int ext4_unlink(struct inode *dir, struct dentry *dentry)

{

	handle_t *handle;

	int retval;



	if (unlikely(ext4_forced_shutdown(EXT4_SB(dir->i_sb))))
@@ -3278,9 +3264,16 @@ static int ext4_unlink(struct inode *dir, struct dentry *dentry) 
	if (retval)

		goto out_trace;



	retval = __ext4_unlink(dir, &dentry->d_name, d_inode(dentry));

	handle = ext4_journal_start(dir, EXT4_HT_DIR,

				    EXT4_DATA_TRANS_BLOCKS(dir->i_sb));

	if (IS_ERR(handle)) {

		retval = PTR_ERR(handle);

		goto out_trace;

	}



	retval = __ext4_unlink(handle, dir, &dentry->d_name, d_inode(dentry));

	if (!retval)

		ext4_fc_track_unlink(d_inode(dentry), dentry);

		ext4_fc_track_unlink(handle, dentry);

#ifdef CONFIG_UNICODE

	/* VFS negative dentries are incompatible with Encoding and

	 * Case-insensitiveness. Eventually we'll want avoid
@@ -3291,6 +3284,8 @@ static int ext4_unlink(struct inode *dir, struct dentry *dentry) 
	if (IS_CASEFOLDED(dir))

		d_invalidate(dentry);

#endif

	if (handle)

		ext4_journal_stop(handle);



out_trace:

	trace_ext4_unlink_exit(dentry, retval);
@@ -3447,7 +3442,6 @@ retry: 


	err = ext4_add_entry(handle, dentry, inode);

	if (!err) {

		ext4_fc_track_link(inode, dentry);

		err = ext4_mark_inode_dirty(handle, inode);

		/* this can happen only for tmpfile being

		 * linked the first time
@@ -3455,6 +3449,7 @@ retry: 
		if (inode->i_nlink == 1)

			ext4_orphan_del(handle, inode);

		d_instantiate(dentry, inode);

		ext4_fc_track_link(handle, dentry);

	} else {

		drop_nlink(inode);

		iput(inode);
@@ -3915,9 +3910,9 @@ static int ext4_rename(struct inode *old_dir, struct dentry *old_dentry, 
			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);

			ext4_fc_track_unlink(handle, new.dentry);

		__ext4_fc_track_link(handle, old.inode, new.dentry);

		__ext4_fc_track_unlink(handle, old.inode, old.dentry);

	}



	if (new.inode) {

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