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-rw-r--r--fs/ext4/ext4_jbd2.c5
-rw-r--r--fs/ext4/extents.c6
-rw-r--r--fs/ext4/file.c14
-rw-r--r--fs/ext4/inline.c3
-rw-r--r--fs/ext4/inode.c35
-rw-r--r--fs/ext4/ioctl.c4
-rw-r--r--fs/ext4/mballoc.c69
-rw-r--r--fs/ext4/page-io.c2
-rw-r--r--fs/ext4/resize.c49
-rw-r--r--fs/ext4/super.c19
10 files changed, 117 insertions, 89 deletions
diff --git a/fs/ext4/ext4_jbd2.c b/fs/ext4/ext4_jbd2.c
index d1a2e6624401..5d8055161acd 100644
--- a/fs/ext4/ext4_jbd2.c
+++ b/fs/ext4/ext4_jbd2.c
@@ -235,8 +235,6 @@ int __ext4_journal_get_write_access(const char *where, unsigned int line,
might_sleep();
- ext4_check_bdev_write_error(sb);
-
if (ext4_handle_valid(handle)) {
err = jbd2_journal_get_write_access(handle, bh);
if (err) {
@@ -244,7 +242,8 @@ int __ext4_journal_get_write_access(const char *where, unsigned int line,
handle, err);
return err;
}
- }
+ } else
+ ext4_check_bdev_write_error(sb);
if (trigger_type == EXT4_JTR_NONE || !ext4_has_metadata_csum(sb))
return 0;
BUG_ON(trigger_type >= EXT4_JOURNAL_TRIGGER_COUNT);
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index d5efe076d3d3..01299b55a567 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -4523,7 +4523,8 @@ static long ext4_zero_range(struct file *file, loff_t offset,
* Round up offset. This is not fallocate, we need to zero out
* blocks, so convert interior block aligned part of the range to
* unwritten and possibly manually zero out unaligned parts of the
- * range.
+ * range. Here, start and partial_begin are inclusive, end and
+ * partial_end are exclusive.
*/
start = round_up(offset, 1 << blkbits);
end = round_down((offset + len), 1 << blkbits);
@@ -4609,7 +4610,8 @@ static long ext4_zero_range(struct file *file, loff_t offset,
* disk in case of crash before zeroing trans is committed.
*/
if (ext4_should_journal_data(inode)) {
- ret = filemap_write_and_wait_range(mapping, start, end);
+ ret = filemap_write_and_wait_range(mapping, start,
+ end - 1);
if (ret) {
filemap_invalidate_unlock(mapping);
goto out_mutex;
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index 0166bb9ca160..6aa15dafc677 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -349,9 +349,10 @@ static void ext4_inode_extension_cleanup(struct inode *inode, ssize_t count)
return;
}
/*
- * If i_disksize got extended due to writeback of delalloc blocks while
- * the DIO was running we could fail to cleanup the orphan list in
- * ext4_handle_inode_extension(). Do it now.
+ * If i_disksize got extended either due to writeback of delalloc
+ * blocks or extending truncate while the DIO was running we could fail
+ * to cleanup the orphan list in ext4_handle_inode_extension(). Do it
+ * now.
*/
if (!list_empty(&EXT4_I(inode)->i_orphan) && inode->i_nlink) {
handle_t *handle = ext4_journal_start(inode, EXT4_HT_INODE, 2);
@@ -386,10 +387,11 @@ static int ext4_dio_write_end_io(struct kiocb *iocb, ssize_t size,
* blocks. But the code in ext4_iomap_alloc() is careful to use
* zeroed/unwritten extents if this is possible; thus we won't leave
* uninitialized blocks in a file even if we didn't succeed in writing
- * as much as we intended.
+ * as much as we intended. Also we can race with truncate or write
+ * expanding the file so we have to be a bit careful here.
*/
- WARN_ON_ONCE(i_size_read(inode) < READ_ONCE(EXT4_I(inode)->i_disksize));
- if (pos + size <= READ_ONCE(EXT4_I(inode)->i_disksize))
+ if (pos + size <= READ_ONCE(EXT4_I(inode)->i_disksize) &&
+ pos + size <= i_size_read(inode))
return size;
return ext4_handle_inode_extension(inode, pos, size);
}
diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
index 9a84a5f9fef4..d5bd1e3a5d36 100644
--- a/fs/ext4/inline.c
+++ b/fs/ext4/inline.c
@@ -502,9 +502,8 @@ static int ext4_read_inline_folio(struct inode *inode, struct folio *folio)
BUG_ON(len > PAGE_SIZE);
kaddr = kmap_local_folio(folio, 0);
ret = ext4_read_inline_data(inode, kaddr, len, &iloc);
- flush_dcache_folio(folio);
+ kaddr = folio_zero_tail(folio, len, kaddr + len);
kunmap_local(kaddr);
- folio_zero_segment(folio, len, folio_size(folio));
folio_mark_uptodate(folio);
brelse(iloc.bh);
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 61277f7f8722..5af1b0b8680e 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -1261,7 +1261,7 @@ static int write_end_fn(handle_t *handle, struct inode *inode,
* We need to pick up the new inode size which generic_commit_write gave us
* `file' can be NULL - eg, when called from page_symlink().
*
- * ext4 never places buffers on inode->i_mapping->private_list. metadata
+ * ext4 never places buffers on inode->i_mapping->i_private_list. metadata
* buffers are managed internally.
*/
static int ext4_write_end(struct file *file,
@@ -2947,7 +2947,7 @@ static int ext4_da_should_update_i_disksize(struct folio *folio,
static int ext4_da_do_write_end(struct address_space *mapping,
loff_t pos, unsigned len, unsigned copied,
- struct page *page)
+ struct folio *folio)
{
struct inode *inode = mapping->host;
loff_t old_size = inode->i_size;
@@ -2958,12 +2958,13 @@ static int ext4_da_do_write_end(struct address_space *mapping,
* block_write_end() will mark the inode as dirty with I_DIRTY_PAGES
* flag, which all that's needed to trigger page writeback.
*/
- copied = block_write_end(NULL, mapping, pos, len, copied, page, NULL);
+ copied = block_write_end(NULL, mapping, pos, len, copied,
+ &folio->page, NULL);
new_i_size = pos + copied;
/*
- * It's important to update i_size while still holding page lock,
- * because page writeout could otherwise come in and zero beyond
+ * It's important to update i_size while still holding folio lock,
+ * because folio writeout could otherwise come in and zero beyond
* i_size.
*
* Since we are holding inode lock, we are sure i_disksize <=
@@ -2981,14 +2982,14 @@ static int ext4_da_do_write_end(struct address_space *mapping,
i_size_write(inode, new_i_size);
end = (new_i_size - 1) & (PAGE_SIZE - 1);
- if (copied && ext4_da_should_update_i_disksize(page_folio(page), end)) {
+ if (copied && ext4_da_should_update_i_disksize(folio, end)) {
ext4_update_i_disksize(inode, new_i_size);
disksize_changed = true;
}
}
- unlock_page(page);
- put_page(page);
+ folio_unlock(folio);
+ folio_put(folio);
if (old_size < pos)
pagecache_isize_extended(inode, old_size, pos);
@@ -3027,10 +3028,10 @@ static int ext4_da_write_end(struct file *file,
return ext4_write_inline_data_end(inode, pos, len, copied,
folio);
- if (unlikely(copied < len) && !PageUptodate(page))
+ if (unlikely(copied < len) && !folio_test_uptodate(folio))
copied = 0;
- return ext4_da_do_write_end(mapping, pos, len, copied, &folio->page);
+ return ext4_da_do_write_end(mapping, pos, len, copied, folio);
}
/*
@@ -3213,7 +3214,7 @@ static bool ext4_inode_datasync_dirty(struct inode *inode)
}
/* Any metadata buffers to write? */
- if (!list_empty(&inode->i_mapping->private_list))
+ if (!list_empty(&inode->i_mapping->i_private_list))
return true;
return inode->i_state & I_DIRTY_DATASYNC;
}
@@ -3564,7 +3565,7 @@ static const struct address_space_operations ext4_aops = {
.direct_IO = noop_direct_IO,
.migrate_folio = buffer_migrate_folio,
.is_partially_uptodate = block_is_partially_uptodate,
- .error_remove_page = generic_error_remove_page,
+ .error_remove_folio = generic_error_remove_folio,
.swap_activate = ext4_iomap_swap_activate,
};
@@ -3581,7 +3582,7 @@ static const struct address_space_operations ext4_journalled_aops = {
.direct_IO = noop_direct_IO,
.migrate_folio = buffer_migrate_folio_norefs,
.is_partially_uptodate = block_is_partially_uptodate,
- .error_remove_page = generic_error_remove_page,
+ .error_remove_folio = generic_error_remove_folio,
.swap_activate = ext4_iomap_swap_activate,
};
@@ -3598,7 +3599,7 @@ static const struct address_space_operations ext4_da_aops = {
.direct_IO = noop_direct_IO,
.migrate_folio = buffer_migrate_folio,
.is_partially_uptodate = block_is_partially_uptodate,
- .error_remove_page = generic_error_remove_page,
+ .error_remove_folio = generic_error_remove_folio,
.swap_activate = ext4_iomap_swap_activate,
};
@@ -3630,6 +3631,12 @@ void ext4_set_aops(struct inode *inode)
inode->i_mapping->a_ops = &ext4_aops;
}
+/*
+ * Here we can't skip an unwritten buffer even though it usually reads zero
+ * because it might have data in pagecache (eg, if called from ext4_zero_range,
+ * ext4_punch_hole, etc) which needs to be properly zeroed out. Otherwise a
+ * racing writeback can come later and flush the stale pagecache to disk.
+ */
static int __ext4_block_zero_page_range(handle_t *handle,
struct address_space *mapping, loff_t from, loff_t length)
{
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index 4f931f80cb34..aa6be510eb8f 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -819,11 +819,11 @@ int ext4_force_shutdown(struct super_block *sb, u32 flags)
switch (flags) {
case EXT4_GOING_FLAGS_DEFAULT:
- ret = freeze_bdev(sb->s_bdev);
+ ret = bdev_freeze(sb->s_bdev);
if (ret)
return ret;
set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
- thaw_bdev(sb->s_bdev);
+ bdev_thaw(sb->s_bdev);
break;
case EXT4_GOING_FLAGS_LOGFLUSH:
set_bit(EXT4_FLAGS_SHUTDOWN, &sbi->s_ext4_flags);
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index 454d5612641e..f44f668e407f 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -1456,9 +1456,8 @@ static int ext4_mb_get_buddy_page_lock(struct super_block *sb,
return 0;
}
- block++;
- pnum = block / blocks_per_page;
- page = find_or_create_page(inode->i_mapping, pnum, gfp);
+ /* blocks_per_page == 1, hence we need another page for the buddy */
+ page = find_or_create_page(inode->i_mapping, block + 1, gfp);
if (!page)
return -ENOMEM;
BUG_ON(page->mapping != inode->i_mapping);
@@ -1958,8 +1957,7 @@ done:
static int mb_find_extent(struct ext4_buddy *e4b, int block,
int needed, struct ext4_free_extent *ex)
{
- int next = block;
- int max, order;
+ int max, order, next;
void *buddy;
assert_spin_locked(ext4_group_lock_ptr(e4b->bd_sb, e4b->bd_group));
@@ -1977,16 +1975,12 @@ static int mb_find_extent(struct ext4_buddy *e4b, int block,
/* find actual order */
order = mb_find_order_for_block(e4b, block);
- block = block >> order;
- ex->fe_len = 1 << order;
- ex->fe_start = block << order;
+ ex->fe_len = (1 << order) - (block & ((1 << order) - 1));
+ ex->fe_start = block;
ex->fe_group = e4b->bd_group;
- /* calc difference from given start */
- next = next - ex->fe_start;
- ex->fe_len -= next;
- ex->fe_start += next;
+ block = block >> order;
while (needed > ex->fe_len &&
mb_find_buddy(e4b, order, &max)) {
@@ -2895,14 +2889,19 @@ repeat:
ac->ac_groups_scanned++;
if (cr == CR_POWER2_ALIGNED)
ext4_mb_simple_scan_group(ac, &e4b);
- else if ((cr == CR_GOAL_LEN_FAST ||
- cr == CR_BEST_AVAIL_LEN) &&
- sbi->s_stripe &&
- !(ac->ac_g_ex.fe_len %
- EXT4_B2C(sbi, sbi->s_stripe)))
- ext4_mb_scan_aligned(ac, &e4b);
- else
- ext4_mb_complex_scan_group(ac, &e4b);
+ else {
+ bool is_stripe_aligned = sbi->s_stripe &&
+ !(ac->ac_g_ex.fe_len %
+ EXT4_B2C(sbi, sbi->s_stripe));
+
+ if ((cr == CR_GOAL_LEN_FAST ||
+ cr == CR_BEST_AVAIL_LEN) &&
+ is_stripe_aligned)
+ ext4_mb_scan_aligned(ac, &e4b);
+
+ if (ac->ac_status == AC_STATUS_CONTINUE)
+ ext4_mb_complex_scan_group(ac, &e4b);
+ }
ext4_unlock_group(sb, group);
ext4_mb_unload_buddy(&e4b);
@@ -4478,6 +4477,10 @@ ext4_mb_normalize_request(struct ext4_allocation_context *ac,
start = max(start, rounddown(ac->ac_o_ex.fe_logical,
(ext4_lblk_t)EXT4_BLOCKS_PER_GROUP(ac->ac_sb)));
+ /* avoid unnecessary preallocation that may trigger assertions */
+ if (start + size > EXT_MAX_BLOCKS)
+ size = EXT_MAX_BLOCKS - start;
+
/* don't cover already allocated blocks in selected range */
if (ar->pleft && start <= ar->lleft) {
size -= ar->lleft + 1 - start;
@@ -6731,11 +6734,16 @@ __acquires(bitlock)
static ext4_grpblk_t ext4_last_grp_cluster(struct super_block *sb,
ext4_group_t grp)
{
- if (grp < ext4_get_groups_count(sb))
- return EXT4_CLUSTERS_PER_GROUP(sb) - 1;
- return (ext4_blocks_count(EXT4_SB(sb)->s_es) -
- ext4_group_first_block_no(sb, grp) - 1) >>
- EXT4_CLUSTER_BITS(sb);
+ unsigned long nr_clusters_in_group;
+
+ if (grp < (ext4_get_groups_count(sb) - 1))
+ nr_clusters_in_group = EXT4_CLUSTERS_PER_GROUP(sb);
+ else
+ nr_clusters_in_group = (ext4_blocks_count(EXT4_SB(sb)->s_es) -
+ ext4_group_first_block_no(sb, grp))
+ >> EXT4_CLUSTER_BITS(sb);
+
+ return nr_clusters_in_group - 1;
}
static bool ext4_trim_interrupted(void)
@@ -6749,13 +6757,15 @@ static int ext4_try_to_trim_range(struct super_block *sb,
__acquires(ext4_group_lock_ptr(sb, e4b->bd_group))
__releases(ext4_group_lock_ptr(sb, e4b->bd_group))
{
- ext4_grpblk_t next, count, free_count;
+ ext4_grpblk_t next, count, free_count, last, origin_start;
bool set_trimmed = false;
void *bitmap;
+ last = ext4_last_grp_cluster(sb, e4b->bd_group);
bitmap = e4b->bd_bitmap;
- if (start == 0 && max >= ext4_last_grp_cluster(sb, e4b->bd_group))
+ if (start == 0 && max >= last)
set_trimmed = true;
+ origin_start = start;
start = max(e4b->bd_info->bb_first_free, start);
count = 0;
free_count = 0;
@@ -6764,7 +6774,10 @@ __releases(ext4_group_lock_ptr(sb, e4b->bd_group))
start = mb_find_next_zero_bit(bitmap, max + 1, start);
if (start > max)
break;
- next = mb_find_next_bit(bitmap, max + 1, start);
+
+ next = mb_find_next_bit(bitmap, last + 1, start);
+ if (origin_start == 0 && next >= last)
+ set_trimmed = true;
if ((next - start) >= minblocks) {
int ret = ext4_trim_extent(sb, start, next - start, e4b);
diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c
index dfdd7e5cf038..312bc6813357 100644
--- a/fs/ext4/page-io.c
+++ b/fs/ext4/page-io.c
@@ -444,7 +444,7 @@ int ext4_bio_write_folio(struct ext4_io_submit *io, struct folio *folio,
folio_clear_error(folio);
/*
- * Comments copied from block_write_full_page:
+ * Comments copied from block_write_full_folio:
*
* The folio straddles i_size. It must be zeroed out on each and every
* writepage invocation because it may be mmapped. "A file is mapped
diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index 4fe061edefdd..4d4a5a32e310 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -218,35 +218,53 @@ struct ext4_new_flex_group_data {
in the flex group */
__u16 *bg_flags; /* block group flags of groups
in @groups */
+ ext4_group_t resize_bg; /* number of allocated
+ new_group_data */
ext4_group_t count; /* number of groups in @groups
*/
};
/*
+ * Avoiding memory allocation failures due to too many groups added each time.
+ */
+#define MAX_RESIZE_BG 16384
+
+/*
* alloc_flex_gd() allocates a ext4_new_flex_group_data with size of
* @flexbg_size.
*
* Returns NULL on failure otherwise address of the allocated structure.
*/
-static struct ext4_new_flex_group_data *alloc_flex_gd(unsigned long flexbg_size)
+static struct ext4_new_flex_group_data *alloc_flex_gd(unsigned int flexbg_size,
+ ext4_group_t o_group, ext4_group_t n_group)
{
+ ext4_group_t last_group;
struct ext4_new_flex_group_data *flex_gd;
flex_gd = kmalloc(sizeof(*flex_gd), GFP_NOFS);
if (flex_gd == NULL)
goto out3;
- if (flexbg_size >= UINT_MAX / sizeof(struct ext4_new_group_data))
- goto out2;
- flex_gd->count = flexbg_size;
+ if (unlikely(flexbg_size > MAX_RESIZE_BG))
+ flex_gd->resize_bg = MAX_RESIZE_BG;
+ else
+ flex_gd->resize_bg = flexbg_size;
+
+ /* Avoid allocating large 'groups' array if not needed */
+ last_group = o_group | (flex_gd->resize_bg - 1);
+ if (n_group <= last_group)
+ flex_gd->resize_bg = 1 << fls(n_group - o_group + 1);
+ else if (n_group - last_group < flex_gd->resize_bg)
+ flex_gd->resize_bg = 1 << max(fls(last_group - o_group + 1),
+ fls(n_group - last_group));
- flex_gd->groups = kmalloc_array(flexbg_size,
+ flex_gd->groups = kmalloc_array(flex_gd->resize_bg,
sizeof(struct ext4_new_group_data),
GFP_NOFS);
if (flex_gd->groups == NULL)
goto out2;
- flex_gd->bg_flags = kmalloc_array(flexbg_size, sizeof(__u16),
+ flex_gd->bg_flags = kmalloc_array(flex_gd->resize_bg, sizeof(__u16),
GFP_NOFS);
if (flex_gd->bg_flags == NULL)
goto out1;
@@ -283,7 +301,7 @@ static void free_flex_gd(struct ext4_new_flex_group_data *flex_gd)
*/
static int ext4_alloc_group_tables(struct super_block *sb,
struct ext4_new_flex_group_data *flex_gd,
- int flexbg_size)
+ unsigned int flexbg_size)
{
struct ext4_new_group_data *group_data = flex_gd->groups;
ext4_fsblk_t start_blk;
@@ -384,12 +402,12 @@ next_group:
group = group_data[0].group;
printk(KERN_DEBUG "EXT4-fs: adding a flex group with "
- "%d groups, flexbg size is %d:\n", flex_gd->count,
+ "%u groups, flexbg size is %u:\n", flex_gd->count,
flexbg_size);
for (i = 0; i < flex_gd->count; i++) {
ext4_debug(
- "adding %s group %u: %u blocks (%d free, %d mdata blocks)\n",
+ "adding %s group %u: %u blocks (%u free, %u mdata blocks)\n",
ext4_bg_has_super(sb, group + i) ? "normal" :
"no-super", group + i,
group_data[i].blocks_count,
@@ -1605,8 +1623,7 @@ exit:
static int ext4_setup_next_flex_gd(struct super_block *sb,
struct ext4_new_flex_group_data *flex_gd,
- ext4_fsblk_t n_blocks_count,
- unsigned long flexbg_size)
+ ext4_fsblk_t n_blocks_count)
{
struct ext4_sb_info *sbi = EXT4_SB(sb);
struct ext4_super_block *es = sbi->s_es;
@@ -1630,7 +1647,7 @@ static int ext4_setup_next_flex_gd(struct super_block *sb,
BUG_ON(last);
ext4_get_group_no_and_offset(sb, n_blocks_count - 1, &n_group, &last);
- last_group = group | (flexbg_size - 1);
+ last_group = group | (flex_gd->resize_bg - 1);
if (last_group > n_group)
last_group = n_group;
@@ -1990,8 +2007,9 @@ int ext4_resize_fs(struct super_block *sb, ext4_fsblk_t n_blocks_count)
ext4_fsblk_t o_blocks_count;
ext4_fsblk_t n_blocks_count_retry = 0;
unsigned long last_update_time = 0;
- int err = 0, flexbg_size = 1 << sbi->s_log_groups_per_flex;
+ int err = 0;
int meta_bg;
+ unsigned int flexbg_size = ext4_flex_bg_size(sbi);
/* See if the device is actually as big as what was requested */
bh = ext4_sb_bread(sb, n_blocks_count - 1, 0);
@@ -2123,7 +2141,7 @@ retry:
if (err)
goto out;
- flex_gd = alloc_flex_gd(flexbg_size);
+ flex_gd = alloc_flex_gd(flexbg_size, o_group, n_group);
if (flex_gd == NULL) {
err = -ENOMEM;
goto out;
@@ -2132,8 +2150,7 @@ retry:
/* Add flex groups. Note that a regular group is a
* flex group with 1 group.
*/
- while (ext4_setup_next_flex_gd(sb, flex_gd, n_blocks_count,
- flexbg_size)) {
+ while (ext4_setup_next_flex_gd(sb, flex_gd, n_blocks_count)) {
if (time_is_before_jiffies(last_update_time + HZ * 10)) {
if (last_update_time)
ext4_msg(sb, KERN_INFO,
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index c5fcf377ab1f..dcba0f85dfe2 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -2793,15 +2793,6 @@ static int ext4_check_opt_consistency(struct fs_context *fc,
return -EINVAL;
}
- if (ctx_test_mount_opt(ctx, EXT4_MOUNT_DIOREAD_NOLOCK)) {
- int blocksize =
- BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size);
- if (blocksize < PAGE_SIZE)
- ext4_msg(NULL, KERN_WARNING, "Warning: mounting with an "
- "experimental mount option 'dioread_nolock' "
- "for blocksize < PAGE_SIZE");
- }
-
err = ext4_check_test_dummy_encryption(fc, sb);
if (err)
return err;
@@ -4410,7 +4401,7 @@ static void ext4_set_def_opts(struct super_block *sb,
((def_mount_opts & EXT4_DEFM_NODELALLOC) == 0))
set_opt(sb, DELALLOC);
- if (sb->s_blocksize == PAGE_SIZE)
+ if (sb->s_blocksize <= PAGE_SIZE)
set_opt(sb, DIOREAD_NOLOCK);
}
@@ -5864,11 +5855,9 @@ static struct bdev_handle *ext4_get_journal_blkdev(struct super_block *sb,
struct ext4_super_block *es;
int errno;
- /* see get_tree_bdev why this is needed and safe */
- up_write(&sb->s_umount);
- bdev_handle = bdev_open_by_dev(j_dev, BLK_OPEN_READ | BLK_OPEN_WRITE,
- sb, &fs_holder_ops);
- down_write(&sb->s_umount);
+ bdev_handle = bdev_open_by_dev(j_dev,
+ BLK_OPEN_READ | BLK_OPEN_WRITE | BLK_OPEN_RESTRICT_WRITES,
+ sb, &fs_holder_ops);
if (IS_ERR(bdev_handle)) {
ext4_msg(sb, KERN_ERR,
"failed to open journal device unknown-block(%u,%u) %ld",
generated by cgit v1.2.3 (git 2.39.0) at 2024-08-06 21:53:42 +0300