[linux.git] / fs / ext4 / ext4_jbd2.c

// SPDX-License-Identifier: GPL-2.0
/*
 * Interface between ext4 and JBD
 */

#include "ext4_jbd2.h"

#include <trace/events/ext4.h>

int ext4_inode_journal_mode(struct inode *inode)
{
	if (EXT4_JOURNAL(inode) == NULL)
		return EXT4_INODE_WRITEBACK_DATA_MODE;	/* writeback */
	/* We do not support data journalling with delayed allocation */
	if (!S_ISREG(inode->i_mode) ||
	    ext4_test_inode_flag(inode, EXT4_INODE_EA_INODE) ||
	    test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA ||
	    (ext4_test_inode_flag(inode, EXT4_INODE_JOURNAL_DATA) &&
	    !test_opt(inode->i_sb, DELALLOC))) {
		/* We do not support data journalling for encrypted data */
		if (S_ISREG(inode->i_mode) && IS_ENCRYPTED(inode))
			return EXT4_INODE_ORDERED_DATA_MODE;  /* ordered */
		return EXT4_INODE_JOURNAL_DATA_MODE;	/* journal data */
	}
	if (test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA)
		return EXT4_INODE_ORDERED_DATA_MODE;	/* ordered */
	if (test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)
		return EXT4_INODE_WRITEBACK_DATA_MODE;	/* writeback */
	BUG();
}

/* Just increment the non-pointer handle value */
static handle_t *ext4_get_nojournal(void)
{
	handle_t *handle = current->journal_info;
	unsigned long ref_cnt = (unsigned long)handle;

	BUG_ON(ref_cnt >= EXT4_NOJOURNAL_MAX_REF_COUNT);

	ref_cnt++;
	handle = (handle_t *)ref_cnt;

	current->journal_info = handle;
	return handle;
}


/* Decrement the non-pointer handle value */
static void ext4_put_nojournal(handle_t *handle)
{
	unsigned long ref_cnt = (unsigned long)handle;

	BUG_ON(ref_cnt == 0);

	ref_cnt--;
	handle = (handle_t *)ref_cnt;

	current->journal_info = handle;
}

/*
 * Wrappers for jbd2_journal_start/end.
 */
static int ext4_journal_check_start(struct super_block *sb)
{
	journal_t *journal;

	might_sleep();

	if (unlikely(ext4_forced_shutdown(EXT4_SB(sb))))
		return -EIO;

	if (sb_rdonly(sb))
		return -EROFS;
	WARN_ON(sb->s_writers.frozen == SB_FREEZE_COMPLETE);
	journal = EXT4_SB(sb)->s_journal;
	/*
	 * Special case here: if the journal has aborted behind our
	 * backs (eg. EIO in the commit thread), then we still need to
	 * take the FS itself readonly cleanly.
	 */
	if (journal && is_journal_aborted(journal)) {
		ext4_abort(sb, -journal->j_errno, "Detected aborted journal");
		return -EROFS;
	}
	return 0;
}

handle_t *__ext4_journal_start_sb(struct super_block *sb, unsigned int line,
				  int type, int blocks, int rsv_blocks,
				  int revoke_creds)
{
	journal_t *journal;
	int err;

	trace_ext4_journal_start(sb, blocks, rsv_blocks, revoke_creds,
				 _RET_IP_);
	err = ext4_journal_check_start(sb);
	if (err < 0)
		return ERR_PTR(err);

	journal = EXT4_SB(sb)->s_journal;
	if (!journal)
		return ext4_get_nojournal();
	return jbd2__journal_start(journal, blocks, rsv_blocks, revoke_creds,
				   GFP_NOFS, type, line);
}

int __ext4_journal_stop(const char *where, unsigned int line, handle_t *handle)
{
	struct super_block *sb;
	int err;
	int rc;

	if (!ext4_handle_valid(handle)) {
		ext4_put_nojournal(handle);
		return 0;
	}

	err = handle->h_err;
	if (!handle->h_transaction) {
		rc = jbd2_journal_stop(handle);
		return err ? err : rc;
	}

	sb = handle->h_transaction->t_journal->j_private;
	rc = jbd2_journal_stop(handle);

	if (!err)
		err = rc;
	if (err)
		__ext4_std_error(sb, where, line, err);
	return err;
}

handle_t *__ext4_journal_start_reserved(handle_t *handle, unsigned int line,
					int type)
{
	struct super_block *sb;
	int err;

	if (!ext4_handle_valid(handle))
		return ext4_get_nojournal();

	sb = handle->h_journal->j_private;
	trace_ext4_journal_start_reserved(sb,
				jbd2_handle_buffer_credits(handle), _RET_IP_);
	err = ext4_journal_check_start(sb);
	if (err < 0) {
		jbd2_journal_free_reserved(handle);
		return ERR_PTR(err);
	}

	err = jbd2_journal_start_reserved(handle, type, line);
	if (err < 0)
		return ERR_PTR(err);
	return handle;
}

int __ext4_journal_ensure_credits(handle_t *handle, int check_cred,
				  int extend_cred, int revoke_cred)
{
	if (!ext4_handle_valid(handle))
		return 0;
	if (jbd2_handle_buffer_credits(handle) >= check_cred &&
	    handle->h_revoke_credits >= revoke_cred)
		return 0;
	extend_cred = max(0, extend_cred - jbd2_handle_buffer_credits(handle));
	revoke_cred = max(0, revoke_cred - handle->h_revoke_credits);
	return ext4_journal_extend(handle, extend_cred, revoke_cred);
}

static void ext4_journal_abort_handle(const char *caller, unsigned int line,
				      const char *err_fn,
				      struct buffer_head *bh,
				      handle_t *handle, int err)
{
	char nbuf[16];
	const char *errstr = ext4_decode_error(NULL, err, nbuf);

	BUG_ON(!ext4_handle_valid(handle));

	if (bh)
		BUFFER_TRACE(bh, "abort");

	if (!handle->h_err)
		handle->h_err = err;

	if (is_handle_aborted(handle))
		return;

	printk(KERN_ERR "EXT4-fs: %s:%d: aborting transaction: %s in %s\n",
	       caller, line, errstr, err_fn);

	jbd2_journal_abort_handle(handle);
}

int __ext4_journal_get_write_access(const char *where, unsigned int line,
				    handle_t *handle, struct buffer_head *bh)
{
	int err = 0;

	might_sleep();

	if (ext4_handle_valid(handle)) {
		err = jbd2_journal_get_write_access(handle, bh);
		if (err)
			ext4_journal_abort_handle(where, line, __func__, bh,
						  handle, err);
	}
	return err;
}

/*
 * The ext4 forget function must perform a revoke if we are freeing data
 * which has been journaled.  Metadata (eg. indirect blocks) must be
 * revoked in all cases.
 *
 * "bh" may be NULL: a metadata block may have been freed from memory
 * but there may still be a record of it in the journal, and that record
 * still needs to be revoked.
 *
 * If the handle isn't valid we're not journaling, but we still need to
 * call into ext4_journal_revoke() to put the buffer head.
 */
int __ext4_forget(const char *where, unsigned int line, handle_t *handle,
		  int is_metadata, struct inode *inode,
		  struct buffer_head *bh, ext4_fsblk_t blocknr)
{
	int err;

	might_sleep();

	trace_ext4_forget(inode, is_metadata, blocknr);
	BUFFER_TRACE(bh, "enter");

	jbd_debug(4, "forgetting bh %p: is_metadata = %d, mode %o, "
		  "data mode %x\n",
		  bh, is_metadata, inode->i_mode,
		  test_opt(inode->i_sb, DATA_FLAGS));

	/* In the no journal case, we can just do a bforget and return */
	if (!ext4_handle_valid(handle)) {
		bforget(bh);
		return 0;
	}

	/* Never use the revoke function if we are doing full data
	 * journaling: there is no need to, and a V1 superblock won't
	 * support it.  Otherwise, only skip the revoke on un-journaled
	 * data blocks. */

	if (test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA ||
	    (!is_metadata && !ext4_should_journal_data(inode))) {
		if (bh) {
			BUFFER_TRACE(bh, "call jbd2_journal_forget");
			err = jbd2_journal_forget(handle, bh);
			if (err)
				ext4_journal_abort_handle(where, line, __func__,
							  bh, handle, err);
			return err;
		}
		return 0;
	}

	/*
	 * data!=journal && (is_metadata || should_journal_data(inode))
	 */
	BUFFER_TRACE(bh, "call jbd2_journal_revoke");
	err = jbd2_journal_revoke(handle, blocknr, bh);
	if (err) {
		ext4_journal_abort_handle(where, line, __func__,
					  bh, handle, err);
		__ext4_abort(inode->i_sb, where, line, -err,
			   "error %d when attempting revoke", err);
	}
	BUFFER_TRACE(bh, "exit");
	return err;
}

int __ext4_journal_get_create_access(const char *where, unsigned int line,
				handle_t *handle, struct buffer_head *bh)
{
	int err = 0;

	if (ext4_handle_valid(handle)) {
		err = jbd2_journal_get_create_access(handle, bh);
		if (err)
			ext4_journal_abort_handle(where, line, __func__,
						  bh, handle, err);
	}
	return err;
}

int __ext4_handle_dirty_metadata(const char *where, unsigned int line,
				 handle_t *handle, struct inode *inode,
				 struct buffer_head *bh)
{
	int err = 0;

	might_sleep();

	set_buffer_meta(bh);
	set_buffer_prio(bh);
	if (ext4_handle_valid(handle)) {
		err = jbd2_journal_dirty_metadata(handle, bh);
		/* Errors can only happen due to aborted journal or a nasty bug */
		if (!is_handle_aborted(handle) && WARN_ON_ONCE(err)) {
			ext4_journal_abort_handle(where, line, __func__, bh,
						  handle, err);
			if (inode == NULL) {
				pr_err("EXT4: jbd2_journal_dirty_metadata "
				       "failed: handle type %u started at "
				       "line %u, credits %u/%u, errcode %d",
				       handle->h_type,
				       handle->h_line_no,
				       handle->h_requested_credits,
				       jbd2_handle_buffer_credits(handle), err);
				return err;
			}
			ext4_error_inode(inode, where, line,
					 bh->b_blocknr,
					 "journal_dirty_metadata failed: "
					 "handle type %u started at line %u, "
					 "credits %u/%u, errcode %d",
					 handle->h_type,
					 handle->h_line_no,
					 handle->h_requested_credits,
					 jbd2_handle_buffer_credits(handle),
					 err);
		}
	} else {
		set_buffer_uptodate(bh);
		if (inode)
			mark_buffer_dirty_inode(bh, inode);
		else
			mark_buffer_dirty(bh);
		if (inode && inode_needs_sync(inode)) {
			sync_dirty_buffer(bh);
			if (buffer_req(bh) && !buffer_uptodate(bh)) {
				ext4_error_inode_err(inode, where, line,
						     bh->b_blocknr, EIO,
					"IO error syncing itable block");
				err = -EIO;
			}
		}
	}
	return err;
}

int __ext4_handle_dirty_super(const char *where, unsigned int line,
			      handle_t *handle, struct super_block *sb)
{
	struct buffer_head *bh = EXT4_SB(sb)->s_sbh;
	int err = 0;

	ext4_superblock_csum_set(sb);
	if (ext4_handle_valid(handle)) {
		err = jbd2_journal_dirty_metadata(handle, bh);
		if (err)
			ext4_journal_abort_handle(where, line, __func__,
						  bh, handle, err);
	} else
		mark_buffer_dirty(bh);
	return err;
}
Commit	Line	Data
b2441318	1	// SPDX-License-Identifier: GPL-2.0
8984d137 AM	2	/*
	3	* Interface between ext4 and JBD
	4	*/
	5
3dcf5451	6	#include "ext4_jbd2.h"
8984d137	7
d6797d14 TT	8	#include <trace/events/ext4.h>
d6797d14 TT	9
46797ad7 EB	10	int ext4_inode_journal_mode(struct inode *inode)
	11	{
	12	if (EXT4_JOURNAL(inode) == NULL)
	13	return EXT4_INODE_WRITEBACK_DATA_MODE; /* writeback */
	14	/* We do not support data journalling with delayed allocation */
	15	if (!S_ISREG(inode->i_mode) \|\|
	16	ext4_test_inode_flag(inode, EXT4_INODE_EA_INODE) \|\|
	17	test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA \|\|
	18	(ext4_test_inode_flag(inode, EXT4_INODE_JOURNAL_DATA) &&
	19	!test_opt(inode->i_sb, DELALLOC))) {
	20	/* We do not support data journalling for encrypted data */
	21	if (S_ISREG(inode->i_mode) && IS_ENCRYPTED(inode))
	22	return EXT4_INODE_ORDERED_DATA_MODE; /* ordered */
	23	return EXT4_INODE_JOURNAL_DATA_MODE; /* journal data */
	24	}
	25	if (test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_ORDERED_DATA)
	26	return EXT4_INODE_ORDERED_DATA_MODE; /* ordered */
	27	if (test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_WRITEBACK_DATA)
	28	return EXT4_INODE_WRITEBACK_DATA_MODE; /* writeback */
	29	BUG();
	30	}
	31
722887dd TT	32	/* Just increment the non-pointer handle value */
	33	static handle_t *ext4_get_nojournal(void)
	34	{
	35	handle_t *handle = current->journal_info;
	36	unsigned long ref_cnt = (unsigned long)handle;
	37
	38	BUG_ON(ref_cnt >= EXT4_NOJOURNAL_MAX_REF_COUNT);
	39
	40	ref_cnt++;
	41	handle = (handle_t *)ref_cnt;
	42
	43	current->journal_info = handle;
	44	return handle;
	45	}
	46
	47
	48	/* Decrement the non-pointer handle value */
	49	static void ext4_put_nojournal(handle_t *handle)
	50	{
	51	unsigned long ref_cnt = (unsigned long)handle;
	52
	53	BUG_ON(ref_cnt == 0);
	54
	55	ref_cnt--;
	56	handle = (handle_t *)ref_cnt;
	57
	58	current->journal_info = handle;
	59	}
	60
	61	/*
	62	* Wrappers for jbd2_journal_start/end.
	63	*/
5fe2fe89	64	static int ext4_journal_check_start(struct super_block *sb)
722887dd TT	65	{
	66	journal_t *journal;
	67
b10a44c3	68	might_sleep();
0db1ff22 TT	69
	70	if (unlikely(ext4_forced_shutdown(EXT4_SB(sb))))
	71	return -EIO;
	72
bc98a42c	73	if (sb_rdonly(sb))
5fe2fe89	74	return -EROFS;
722887dd TT	75	WARN_ON(sb->s_writers.frozen == SB_FREEZE_COMPLETE);
722887dd TT	76	journal = EXT4_SB(sb)->s_journal;
722887dd TT	77	/*
	78	* Special case here: if the journal has aborted behind our
	79	* backs (eg. EIO in the commit thread), then we still need to
	80	* take the FS itself readonly cleanly.
	81	*/
5fe2fe89	82	if (journal && is_journal_aborted(journal)) {
54d3adbc	83	ext4_abort(sb, -journal->j_errno, "Detected aborted journal");
5fe2fe89	84	return -EROFS;
722887dd	85	}
5fe2fe89 JK	86	return 0;
	87	}
	88
	89	handle_t __ext4_journal_start_sb(struct super_block sb, unsigned int line,
83448bdf JK	90	int type, int blocks, int rsv_blocks,
83448bdf JK	91	int revoke_creds)
5fe2fe89 JK	92	{
	93	journal_t *journal;
	94	int err;
	95
83448bdf JK	96	trace_ext4_journal_start(sb, blocks, rsv_blocks, revoke_creds,
83448bdf JK	97	_RET_IP_);
5fe2fe89 JK	98	err = ext4_journal_check_start(sb);
	99	if (err < 0)
	100	return ERR_PTR(err);
	101
	102	journal = EXT4_SB(sb)->s_journal;
	103	if (!journal)
	104	return ext4_get_nojournal();
83448bdf JK	105	return jbd2__journal_start(journal, blocks, rsv_blocks, revoke_creds,
83448bdf JK	106	GFP_NOFS, type, line);
722887dd TT	107	}
	108
	109	int __ext4_journal_stop(const char where, unsigned int line, handle_t handle)
	110	{
	111	struct super_block *sb;
	112	int err;
	113	int rc;
	114
	115	if (!ext4_handle_valid(handle)) {
	116	ext4_put_nojournal(handle);
	117	return 0;
	118	}
9d506594	119
6934da92	120	err = handle->h_err;
9d506594	121	if (!handle->h_transaction) {
6934da92 LC	122	rc = jbd2_journal_stop(handle);
6934da92 LC	123	return err ? err : rc;
9d506594 LC	124	}
9d506594 LC	125
722887dd	126	sb = handle->h_transaction->t_journal->j_private;
722887dd TT	127	rc = jbd2_journal_stop(handle);
	128
	129	if (!err)
	130	err = rc;
	131	if (err)
	132	__ext4_std_error(sb, where, line, err);
	133	return err;
	134	}
	135
5fe2fe89 JK	136	handle_t __ext4_journal_start_reserved(handle_t handle, unsigned int line,
	137	int type)
	138	{
	139	struct super_block *sb;
	140	int err;
	141
	142	if (!ext4_handle_valid(handle))
	143	return ext4_get_nojournal();
	144
	145	sb = handle->h_journal->j_private;
a9a8344e JK	146	trace_ext4_journal_start_reserved(sb,
a9a8344e JK	147	jbd2_handle_buffer_credits(handle), _RET_IP_);
5fe2fe89 JK	148	err = ext4_journal_check_start(sb);
	149	if (err < 0) {
	150	jbd2_journal_free_reserved(handle);
	151	return ERR_PTR(err);
	152	}
	153
	154	err = jbd2_journal_start_reserved(handle, type, line);
	155	if (err < 0)
	156	return ERR_PTR(err);
	157	return handle;
	158	}
	159
a4130367	160	int __ext4_journal_ensure_credits(handle_t *handle, int check_cred,
83448bdf	161	int extend_cred, int revoke_cred)
a4130367 JK	162	{
	163	if (!ext4_handle_valid(handle))
	164	return 0;
83448bdf JK	165	if (jbd2_handle_buffer_credits(handle) >= check_cred &&
83448bdf JK	166	handle->h_revoke_credits >= revoke_cred)
a4130367	167	return 0;
83448bdf JK	168	extend_cred = max(0, extend_cred - jbd2_handle_buffer_credits(handle));
	169	revoke_cred = max(0, revoke_cred - handle->h_revoke_credits);
	170	return ext4_journal_extend(handle, extend_cred, revoke_cred);
a4130367 JK	171	}
a4130367 JK	172
c197855e SH	173	static void ext4_journal_abort_handle(const char *caller, unsigned int line,
	174	const char *err_fn,
	175	struct buffer_head *bh,
	176	handle_t *handle, int err)
722887dd TT	177	{
	178	char nbuf[16];
	179	const char *errstr = ext4_decode_error(NULL, err, nbuf);
	180
	181	BUG_ON(!ext4_handle_valid(handle));
	182
	183	if (bh)
	184	BUFFER_TRACE(bh, "abort");
	185
	186	if (!handle->h_err)
	187	handle->h_err = err;
	188
	189	if (is_handle_aborted(handle))
	190	return;
	191
	192	printk(KERN_ERR "EXT4-fs: %s:%d: aborting transaction: %s in %s\n",
	193	caller, line, errstr, err_fn);
	194
	195	jbd2_journal_abort_handle(handle);
	196	}
	197
90c7201b TT	198	int __ext4_journal_get_write_access(const char *where, unsigned int line,
90c7201b TT	199	handle_t handle, struct buffer_head bh)
8984d137	200	{
0390131b FM	201	int err = 0;
0390131b FM	202
b10a44c3 TT	203	might_sleep();
b10a44c3 TT	204
0390131b FM	205	if (ext4_handle_valid(handle)) {
	206	err = jbd2_journal_get_write_access(handle, bh);
	207	if (err)
90c7201b	208	ext4_journal_abort_handle(where, line, __func__, bh,
0390131b FM	209	handle, err);
0390131b FM	210	}
8984d137 AM	211	return err;
	212	}
	213
d6797d14 TT	214	/*
	215	* The ext4 forget function must perform a revoke if we are freeing data
	216	* which has been journaled. Metadata (eg. indirect blocks) must be
	217	* revoked in all cases.
	218	*
	219	* "bh" may be NULL: a metadata block may have been freed from memory
	220	* but there may still be a record of it in the journal, and that record
	221	* still needs to be revoked.
	222	*
	223	* If the handle isn't valid we're not journaling, but we still need to
	224	* call into ext4_journal_revoke() to put the buffer head.
	225	*/
90c7201b TT	226	int __ext4_forget(const char where, unsigned int line, handle_t handle,
	227	int is_metadata, struct inode *inode,
	228	struct buffer_head *bh, ext4_fsblk_t blocknr)
d6797d14 TT	229	{
	230	int err;
	231
	232	might_sleep();
	233
	234	trace_ext4_forget(inode, is_metadata, blocknr);
	235	BUFFER_TRACE(bh, "enter");
	236
	237	jbd_debug(4, "forgetting bh %p: is_metadata = %d, mode %o, "
	238	"data mode %x\n",
	239	bh, is_metadata, inode->i_mode,
	240	test_opt(inode->i_sb, DATA_FLAGS));
	241
e4684b3f TT	242	/* In the no journal case, we can just do a bforget and return */
	243	if (!ext4_handle_valid(handle)) {
	244	bforget(bh);
	245	return 0;
	246	}
	247
d6797d14 TT	248	/* Never use the revoke function if we are doing full data
	249	* journaling: there is no need to, and a V1 superblock won't
	250	* support it. Otherwise, only skip the revoke on un-journaled
	251	* data blocks. */
	252
	253	if (test_opt(inode->i_sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA \|\|
	254	(!is_metadata && !ext4_should_journal_data(inode))) {
	255	if (bh) {
	256	BUFFER_TRACE(bh, "call jbd2_journal_forget");
b7e57e7c TT	257	err = jbd2_journal_forget(handle, bh);
b7e57e7c TT	258	if (err)
90c7201b TT	259	ext4_journal_abort_handle(where, line, __func__,
90c7201b TT	260	bh, handle, err);
b7e57e7c	261	return err;
d6797d14 TT	262	}
	263	return 0;
	264	}
	265
	266	/*
	267	* data!=journal && (is_metadata \|\| should_journal_data(inode))
	268	*/
e4684b3f TT	269	BUFFER_TRACE(bh, "call jbd2_journal_revoke");
	270	err = jbd2_journal_revoke(handle, blocknr, bh);
	271	if (err) {
90c7201b TT	272	ext4_journal_abort_handle(where, line, __func__,
90c7201b TT	273	bh, handle, err);
54d3adbc	274	__ext4_abort(inode->i_sb, where, line, -err,
c398eda0	275	"error %d when attempting revoke", err);
e4684b3f	276	}
d6797d14 TT	277	BUFFER_TRACE(bh, "exit");
	278	return err;
	279	}
	280
90c7201b	281	int __ext4_journal_get_create_access(const char *where, unsigned int line,
8984d137 AM	282	handle_t handle, struct buffer_head bh)
8984d137 AM	283	{
0390131b FM	284	int err = 0;
	285
	286	if (ext4_handle_valid(handle)) {
	287	err = jbd2_journal_get_create_access(handle, bh);
	288	if (err)
90c7201b TT	289	ext4_journal_abort_handle(where, line, __func__,
90c7201b TT	290	bh, handle, err);
0390131b	291	}
8984d137 AM	292	return err;
	293	}
	294
90c7201b TT	295	int __ext4_handle_dirty_metadata(const char *where, unsigned int line,
	296	handle_t handle, struct inode inode,
	297	struct buffer_head *bh)
8984d137	298	{
0390131b FM	299	int err = 0;
0390131b FM	300
b10a44c3 TT	301	might_sleep();
b10a44c3 TT	302
13fca323 TT	303	set_buffer_meta(bh);
13fca323 TT	304	set_buffer_prio(bh);
0390131b FM	305	if (ext4_handle_valid(handle)) {
0390131b FM	306	err = jbd2_journal_dirty_metadata(handle, bh);
c5d31192 DM	307	/* Errors can only happen due to aborted journal or a nasty bug */
c5d31192 DM	308	if (!is_handle_aborted(handle) && WARN_ON_ONCE(err)) {
91aa11fa JK	309	ext4_journal_abort_handle(where, line, __func__, bh,
91aa11fa JK	310	handle, err);
66a4cb18 TT	311	if (inode == NULL) {
	312	pr_err("EXT4: jbd2_journal_dirty_metadata "
	313	"failed: handle type %u started at "
	314	"line %u, credits %u/%u, errcode %d",
	315	handle->h_type,
	316	handle->h_line_no,
	317	handle->h_requested_credits,
a9a8344e	318	jbd2_handle_buffer_credits(handle), err);
66a4cb18 TT	319	return err;
66a4cb18 TT	320	}
ae1495b1 TT	321	ext4_error_inode(inode, where, line,
	322	bh->b_blocknr,
	323	"journal_dirty_metadata failed: "
	324	"handle type %u started at line %u, "
	325	"credits %u/%u, errcode %d",
	326	handle->h_type,
	327	handle->h_line_no,
	328	handle->h_requested_credits,
a9a8344e JK	329	jbd2_handle_buffer_credits(handle),
a9a8344e JK	330	err);
9ea7a0df	331	}
0390131b	332	} else {
f2eeca09	333	set_buffer_uptodate(bh);
73b50c1c	334	if (inode)
fe188c0e TT	335	mark_buffer_dirty_inode(bh, inode);
	336	else
	337	mark_buffer_dirty(bh);
0390131b FM	338	if (inode && inode_needs_sync(inode)) {
	339	sync_dirty_buffer(bh);
	340	if (buffer_req(bh) && !buffer_uptodate(bh)) {
54d3adbc TT	341	ext4_error_inode_err(inode, where, line,
54d3adbc TT	342	bh->b_blocknr, EIO,
c398eda0	343	"IO error syncing itable block");
0390131b FM	344	err = -EIO;
	345	}
	346	}
	347	}
8984d137 AM	348	return err;
8984d137 AM	349	}
a0375156	350
90c7201b	351	int __ext4_handle_dirty_super(const char *where, unsigned int line,
b50924c2	352	handle_t handle, struct super_block sb)
a0375156 TT	353	{
	354	struct buffer_head *bh = EXT4_SB(sb)->s_sbh;
	355	int err = 0;
	356
06db49e6	357	ext4_superblock_csum_set(sb);
a0375156 TT	358	if (ext4_handle_valid(handle)) {
	359	err = jbd2_journal_dirty_metadata(handle, bh);
	360	if (err)
90c7201b TT	361	ext4_journal_abort_handle(where, line, __func__,
90c7201b TT	362	bh, handle, err);
06db49e6	363	} else
a9c47317	364	mark_buffer_dirty(bh);
a0375156 TT	365	return err;
a0375156 TT	366	}