static inline int
ext4_init_acl(handle_t *handle, struct inode *inode, struct inode *dir)
{
+ /* usually, the umask is applied by posix_acl_create(), but if
+ ext4 ACL support is disabled at compile time, we need to do
+ it here, because posix_acl_create() will never be called */
+ inode->i_mode &= ~current_umask();
+
return 0;
}
#endif /* CONFIG_EXT4_FS_POSIX_ACL */
#include "mballoc.h"
#include <trace/events/ext4.h>
+#include <kunit/static_stub.h>
static unsigned ext4_num_base_meta_clusters(struct super_block *sb,
ext4_group_t block_group);
itbl_blk_start = ext4_inode_table(sb, gdp);
itbl_blk_end = itbl_blk_start + sbi->s_itb_per_group - 1;
if (itbl_blk_start <= end && itbl_blk_end >= start) {
- itbl_blk_start = itbl_blk_start >= start ?
- itbl_blk_start : start;
- itbl_blk_end = itbl_blk_end <= end ?
- itbl_blk_end : end;
+ itbl_blk_start = max(itbl_blk_start, start);
+ itbl_blk_end = min(itbl_blk_end, end);
itbl_cluster_start = EXT4_B2C(sbi, itbl_blk_start - start);
itbl_cluster_end = EXT4_B2C(sbi, itbl_blk_end - start);
struct ext4_sb_info *sbi = EXT4_SB(sb);
struct buffer_head *bh_p;
+ KUNIT_STATIC_STUB_REDIRECT(ext4_get_group_desc,
+ sb, block_group, bh);
+
if (block_group >= ngroups) {
ext4_error(sb, "block_group >= groups_count - block_group = %u,"
" groups_count = %u", block_group, ngroups);
ext4_fsblk_t bitmap_blk;
int err;
+ KUNIT_STATIC_STUB_REDIRECT(ext4_read_block_bitmap_nowait,
+ sb, block_group, ignore_locked);
+
desc = ext4_get_group_desc(sb, block_group, NULL);
if (!desc)
return ERR_PTR(-EFSCORRUPTED);
{
struct ext4_group_desc *desc;
+ KUNIT_STATIC_STUB_REDIRECT(ext4_wait_block_bitmap,
+ sb, block_group, bh);
+
if (!buffer_new(bh))
return 0;
desc = ext4_get_group_desc(sb, block_group, NULL);
loff_t s_bitmap_maxbytes; /* max bytes for bitmap files */
struct buffer_head * s_sbh; /* Buffer containing the super block */
struct ext4_super_block *s_es; /* Pointer to the super block in the buffer */
+ /* Array of bh's for the block group descriptors */
struct buffer_head * __rcu *s_group_desc;
unsigned int s_mount_opt;
unsigned int s_mount_opt2;
unsigned int *s_mb_maxs;
unsigned int s_group_info_size;
unsigned int s_mb_free_pending;
- struct list_head s_freed_data_list; /* List of blocks to be freed
+ struct list_head s_freed_data_list[2]; /* List of blocks to be freed
after commit completed */
struct list_head s_discard_list;
struct work_struct s_discard_work;
/*
* Barrier between writepages ops and changing any inode's JOURNAL_DATA
- * or EXTENTS flag.
+ * or EXTENTS flag or between writepages ops and changing DELALLOC or
+ * DIOREAD_NOLOCK mount options on remount.
*/
struct percpu_rw_semaphore s_writepages_rwsem;
struct dax_device *s_daxdev;
extern int ext4_trim_fs(struct super_block *, struct fstrim_range *);
extern void ext4_process_freed_data(struct super_block *sb, tid_t commit_tid);
extern void ext4_mb_mark_bb(struct super_block *sb, ext4_fsblk_t block,
- int len, int state);
+ int len, bool state);
static inline bool ext4_mb_cr_expensive(enum criteria cr)
{
return cr >= CR_GOAL_LEN_SLOW;
ix = curp->p_idx;
}
+ if (unlikely(ix > EXT_MAX_INDEX(curp->p_hdr))) {
+ EXT4_ERROR_INODE(inode, "ix > EXT_MAX_INDEX!");
+ return -EFSCORRUPTED;
+ }
+
len = EXT_LAST_INDEX(curp->p_hdr) - ix + 1;
BUG_ON(len < 0);
if (len > 0) {
memmove(ix + 1, ix, len * sizeof(struct ext4_extent_idx));
}
- if (unlikely(ix > EXT_MAX_INDEX(curp->p_hdr))) {
- EXT4_ERROR_INODE(inode, "ix > EXT_MAX_INDEX!");
- return -EFSCORRUPTED;
- }
-
ix->ei_block = cpu_to_le32(logical);
ext4_idx_store_pblock(ix, ptr);
le16_add_cpu(&curp->p_hdr->eh_entries, 1);
for (j = 0; j < path->p_depth; j++) {
ext4_mb_mark_bb(inode->i_sb,
- path[j].p_block, 1, 0);
+ path[j].p_block, 1, false);
ext4_fc_record_regions(inode->i_sb, inode->i_ino,
0, path[j].p_block, 1, 1);
}
ext4_free_ext_path(path);
}
- ext4_mb_mark_bb(inode->i_sb, map.m_pblk, map.m_len, 0);
+ ext4_mb_mark_bb(inode->i_sb, map.m_pblk, map.m_len, false);
ext4_fc_record_regions(inode->i_sb, inode->i_ino,
map.m_lblk, map.m_pblk, map.m_len, 1);
}
static int es_reclaim_extents(struct ext4_inode_info *ei, int *nr_to_scan);
static int __es_shrink(struct ext4_sb_info *sbi, int nr_to_scan,
struct ext4_inode_info *locked_ei);
-static void __revise_pending(struct inode *inode, ext4_lblk_t lblk,
- ext4_lblk_t len);
+static int __revise_pending(struct inode *inode, ext4_lblk_t lblk,
+ ext4_lblk_t len,
+ struct pending_reservation **prealloc);
int __init ext4_init_es(void)
{
spin_unlock(&sbi->s_es_lock);
}
+static inline struct pending_reservation *__alloc_pending(bool nofail)
+{
+ if (!nofail)
+ return kmem_cache_alloc(ext4_pending_cachep, GFP_ATOMIC);
+
+ return kmem_cache_zalloc(ext4_pending_cachep, GFP_KERNEL | __GFP_NOFAIL);
+}
+
+static inline void __free_pending(struct pending_reservation *pr)
+{
+ kmem_cache_free(ext4_pending_cachep, pr);
+}
+
/*
* Returns true if we cannot fail to allocate memory for this extent_status
* entry and cannot reclaim it until its status changes.
{
struct extent_status newes;
ext4_lblk_t end = lblk + len - 1;
- int err1 = 0;
- int err2 = 0;
+ int err1 = 0, err2 = 0, err3 = 0;
struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
struct extent_status *es1 = NULL;
struct extent_status *es2 = NULL;
+ struct pending_reservation *pr = NULL;
+ bool revise_pending = false;
if (EXT4_SB(inode->i_sb)->s_mount_state & EXT4_FC_REPLAY)
return;
ext4_es_insert_extent_check(inode, &newes);
+ revise_pending = sbi->s_cluster_ratio > 1 &&
+ test_opt(inode->i_sb, DELALLOC) &&
+ (status & (EXTENT_STATUS_WRITTEN |
+ EXTENT_STATUS_UNWRITTEN));
retry:
if (err1 && !es1)
es1 = __es_alloc_extent(true);
if ((err1 || err2) && !es2)
es2 = __es_alloc_extent(true);
+ if ((err1 || err2 || err3) && revise_pending && !pr)
+ pr = __alloc_pending(true);
write_lock(&EXT4_I(inode)->i_es_lock);
err1 = __es_remove_extent(inode, lblk, end, NULL, es1);
es2 = NULL;
}
- if (sbi->s_cluster_ratio > 1 && test_opt(inode->i_sb, DELALLOC) &&
- (status & EXTENT_STATUS_WRITTEN ||
- status & EXTENT_STATUS_UNWRITTEN))
- __revise_pending(inode, lblk, len);
+ if (revise_pending) {
+ err3 = __revise_pending(inode, lblk, len, &pr);
+ if (err3 != 0)
+ goto error;
+ if (pr) {
+ __free_pending(pr);
+ pr = NULL;
+ }
+ }
error:
write_unlock(&EXT4_I(inode)->i_es_lock);
- if (err1 || err2)
+ if (err1 || err2 || err3)
goto retry;
ext4_es_print_tree(inode);
rc->ndelonly--;
node = rb_next(&pr->rb_node);
rb_erase(&pr->rb_node, &tree->root);
- kmem_cache_free(ext4_pending_cachep, pr);
+ __free_pending(pr);
if (!node)
break;
pr = rb_entry(node, struct pending_reservation,
}
}
if (count_reserved)
- count_rsvd(inode, lblk, orig_es.es_len - len1 - len2,
- &orig_es, &rc);
+ count_rsvd(inode, orig_es.es_lblk + len1,
+ orig_es.es_len - len1 - len2, &orig_es, &rc);
goto out_get_reserved;
}
*
* @inode - file containing the cluster
* @lblk - logical block in the cluster to be added
+ * @prealloc - preallocated pending entry
*
* Returns 0 on successful insertion and -ENOMEM on failure. If the
* pending reservation is already in the set, returns successfully.
*/
-static int __insert_pending(struct inode *inode, ext4_lblk_t lblk)
+static int __insert_pending(struct inode *inode, ext4_lblk_t lblk,
+ struct pending_reservation **prealloc)
{
struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
struct ext4_pending_tree *tree = &EXT4_I(inode)->i_pending_tree;
}
}
- pr = kmem_cache_alloc(ext4_pending_cachep, GFP_ATOMIC);
- if (pr == NULL) {
- ret = -ENOMEM;
- goto out;
+ if (likely(*prealloc == NULL)) {
+ pr = __alloc_pending(false);
+ if (!pr) {
+ ret = -ENOMEM;
+ goto out;
+ }
+ } else {
+ pr = *prealloc;
+ *prealloc = NULL;
}
pr->lclu = lclu;
if (pr != NULL) {
tree = &EXT4_I(inode)->i_pending_tree;
rb_erase(&pr->rb_node, &tree->root);
- kmem_cache_free(ext4_pending_cachep, pr);
+ __free_pending(pr);
}
}
bool allocated)
{
struct extent_status newes;
- int err1 = 0;
- int err2 = 0;
+ int err1 = 0, err2 = 0, err3 = 0;
struct extent_status *es1 = NULL;
struct extent_status *es2 = NULL;
+ struct pending_reservation *pr = NULL;
if (EXT4_SB(inode->i_sb)->s_mount_state & EXT4_FC_REPLAY)
return;
es1 = __es_alloc_extent(true);
if ((err1 || err2) && !es2)
es2 = __es_alloc_extent(true);
+ if ((err1 || err2 || err3) && allocated && !pr)
+ pr = __alloc_pending(true);
write_lock(&EXT4_I(inode)->i_es_lock);
err1 = __es_remove_extent(inode, lblk, lblk, NULL, es1);
es2 = NULL;
}
- if (allocated)
- __insert_pending(inode, lblk);
+ if (allocated) {
+ err3 = __insert_pending(inode, lblk, &pr);
+ if (err3 != 0)
+ goto error;
+ if (pr) {
+ __free_pending(pr);
+ pr = NULL;
+ }
+ }
error:
write_unlock(&EXT4_I(inode)->i_es_lock);
- if (err1 || err2)
+ if (err1 || err2 || err3)
goto retry;
ext4_es_print_tree(inode);
* @inode - file containing the range
* @lblk - logical block defining the start of range
* @len - length of range in blocks
+ * @prealloc - preallocated pending entry
*
* Used after a newly allocated extent is added to the extents status tree.
* Requires that the extents in the range have either written or unwritten
* status. Must be called while holding i_es_lock.
*/
-static void __revise_pending(struct inode *inode, ext4_lblk_t lblk,
- ext4_lblk_t len)
+static int __revise_pending(struct inode *inode, ext4_lblk_t lblk,
+ ext4_lblk_t len,
+ struct pending_reservation **prealloc)
{
struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
ext4_lblk_t end = lblk + len - 1;
ext4_lblk_t first, last;
bool f_del = false, l_del = false;
+ int ret = 0;
if (len == 0)
- return;
+ return 0;
/*
* Two cases - block range within single cluster and block range
f_del = __es_scan_range(inode, &ext4_es_is_delonly,
first, lblk - 1);
if (f_del) {
- __insert_pending(inode, first);
+ ret = __insert_pending(inode, first, prealloc);
+ if (ret < 0)
+ goto out;
} else {
last = EXT4_LBLK_CMASK(sbi, end) +
sbi->s_cluster_ratio - 1;
l_del = __es_scan_range(inode,
&ext4_es_is_delonly,
end + 1, last);
- if (l_del)
- __insert_pending(inode, last);
- else
+ if (l_del) {
+ ret = __insert_pending(inode, last, prealloc);
+ if (ret < 0)
+ goto out;
+ } else
__remove_pending(inode, last);
}
} else {
if (first != lblk)
f_del = __es_scan_range(inode, &ext4_es_is_delonly,
first, lblk - 1);
- if (f_del)
- __insert_pending(inode, first);
- else
+ if (f_del) {
+ ret = __insert_pending(inode, first, prealloc);
+ if (ret < 0)
+ goto out;
+ } else
__remove_pending(inode, first);
last = EXT4_LBLK_CMASK(sbi, end) + sbi->s_cluster_ratio - 1;
if (last != end)
l_del = __es_scan_range(inode, &ext4_es_is_delonly,
end + 1, last);
- if (l_del)
- __insert_pending(inode, last);
- else
+ if (l_del) {
+ ret = __insert_pending(inode, last, prealloc);
+ if (ret < 0)
+ goto out;
+ } else
__remove_pending(inode, last);
}
+out:
+ return ret;
}
* at the end of the FC replay using our array of
* modified inodes.
*/
- ext4_mb_mark_bb(inode->i_sb, map.m_pblk, map.m_len, 0);
+ ext4_mb_mark_bb(inode->i_sb, map.m_pblk, map.m_len, false);
goto next;
}
if (ret > 0) {
remaining -= ret;
cur += ret;
- ext4_mb_mark_bb(inode->i_sb, map.m_pblk, map.m_len, 0);
+ ext4_mb_mark_bb(inode->i_sb, map.m_pblk, map.m_len, false);
} else {
remaining -= map.m_len;
cur += map.m_len;
if (!IS_ERR(path)) {
for (j = 0; j < path->p_depth; j++)
ext4_mb_mark_bb(inode->i_sb,
- path[j].p_block, 1, 1);
+ path[j].p_block, 1, true);
ext4_free_ext_path(path);
}
cur += ret;
ext4_mb_mark_bb(inode->i_sb, map.m_pblk,
- map.m_len, 1);
+ map.m_len, true);
} else {
cur = cur + (map.m_len ? map.m_len : 1);
}
}
static ssize_t ext4_handle_inode_extension(struct inode *inode, loff_t offset,
- ssize_t written, size_t count)
+ ssize_t count)
{
handle_t *handle;
- bool truncate = false;
- u8 blkbits = inode->i_blkbits;
- ext4_lblk_t written_blk, end_blk;
- int ret;
-
- /*
- * Note that EXT4_I(inode)->i_disksize can get extended up to
- * inode->i_size while the I/O was running due to writeback of delalloc
- * 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.
- */
- WARN_ON_ONCE(i_size_read(inode) < EXT4_I(inode)->i_disksize);
- if (offset + count <= EXT4_I(inode)->i_disksize) {
- /*
- * We need to ensure that the inode is removed from the orphan
- * list if it has been added prematurely, due to writeback of
- * delalloc blocks.
- */
- if (!list_empty(&EXT4_I(inode)->i_orphan) && inode->i_nlink) {
- handle = ext4_journal_start(inode, EXT4_HT_INODE, 2);
-
- if (IS_ERR(handle)) {
- ext4_orphan_del(NULL, inode);
- return PTR_ERR(handle);
- }
-
- ext4_orphan_del(handle, inode);
- ext4_journal_stop(handle);
- }
-
- return written;
- }
-
- if (written < 0)
- goto truncate;
+ lockdep_assert_held_write(&inode->i_rwsem);
handle = ext4_journal_start(inode, EXT4_HT_INODE, 2);
- if (IS_ERR(handle)) {
- written = PTR_ERR(handle);
- goto truncate;
- }
+ if (IS_ERR(handle))
+ return PTR_ERR(handle);
- if (ext4_update_inode_size(inode, offset + written)) {
- ret = ext4_mark_inode_dirty(handle, inode);
+ if (ext4_update_inode_size(inode, offset + count)) {
+ int ret = ext4_mark_inode_dirty(handle, inode);
if (unlikely(ret)) {
- written = ret;
ext4_journal_stop(handle);
- goto truncate;
+ return ret;
}
}
- /*
- * We may need to truncate allocated but not written blocks beyond EOF.
- */
- written_blk = ALIGN(offset + written, 1 << blkbits);
- end_blk = ALIGN(offset + count, 1 << blkbits);
- if (written_blk < end_blk && ext4_can_truncate(inode))
- truncate = true;
-
- /*
- * Remove the inode from the orphan list if it has been extended and
- * everything went OK.
- */
- if (!truncate && inode->i_nlink)
+ if (inode->i_nlink)
ext4_orphan_del(handle, inode);
ext4_journal_stop(handle);
- if (truncate) {
-truncate:
+ return count;
+}
+
+/*
+ * Clean up the inode after DIO or DAX extending write has completed and the
+ * inode size has been updated using ext4_handle_inode_extension().
+ */
+static void ext4_inode_extension_cleanup(struct inode *inode, ssize_t count)
+{
+ lockdep_assert_held_write(&inode->i_rwsem);
+ if (count < 0) {
ext4_truncate_failed_write(inode);
/*
* If the truncate operation failed early, then the inode may
*/
if (inode->i_nlink)
ext4_orphan_del(NULL, inode);
+ 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 (!list_empty(&EXT4_I(inode)->i_orphan) && inode->i_nlink) {
+ handle_t *handle = ext4_journal_start(inode, EXT4_HT_INODE, 2);
- return written;
+ if (IS_ERR(handle)) {
+ /*
+ * The write has successfully completed. Not much to
+ * do with the error here so just cleanup the orphan
+ * list and hope for the best.
+ */
+ ext4_orphan_del(NULL, inode);
+ return;
+ }
+ ext4_orphan_del(handle, inode);
+ ext4_journal_stop(handle);
+ }
}
static int ext4_dio_write_end_io(struct kiocb *iocb, ssize_t size,
loff_t pos = iocb->ki_pos;
struct inode *inode = file_inode(iocb->ki_filp);
+ if (!error && size && flags & IOMAP_DIO_UNWRITTEN)
+ error = ext4_convert_unwritten_extents(NULL, inode, pos, size);
if (error)
return error;
-
- if (size && flags & IOMAP_DIO_UNWRITTEN) {
- error = ext4_convert_unwritten_extents(NULL, inode, pos, size);
- if (error < 0)
- return error;
- }
/*
- * If we are extending the file, we have to update i_size here before
- * page cache gets invalidated in iomap_dio_rw(). Otherwise racing
- * buffered reads could zero out too much from page cache pages. Update
- * of on-disk size will happen later in ext4_dio_write_iter() where
- * we have enough information to also perform orphan list handling etc.
- * Note that we perform all extending writes synchronously under
- * i_rwsem held exclusively so i_size update is safe here in that case.
- * If the write was not extending, we cannot see pos > i_size here
- * because operations reducing i_size like truncate wait for all
- * outstanding DIO before updating i_size.
+ * Note that EXT4_I(inode)->i_disksize can get extended up to
+ * inode->i_size while the I/O was running due to writeback of delalloc
+ * 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.
*/
- pos += size;
- if (pos > i_size_read(inode))
- i_size_write(inode, pos);
-
- return 0;
+ WARN_ON_ONCE(i_size_read(inode) < READ_ONCE(EXT4_I(inode)->i_disksize));
+ if (pos + size <= READ_ONCE(EXT4_I(inode)->i_disksize))
+ return size;
+ return ext4_handle_inode_extension(inode, pos, size);
}
static const struct iomap_dio_ops ext4_dio_write_ops = {
return ext4_buffered_write_iter(iocb, from);
}
+ /*
+ * Prevent inline data from being created since we are going to allocate
+ * blocks for DIO. We know the inode does not currently have inline data
+ * because ext4_should_use_dio() checked for it, but we have to clear
+ * the state flag before the write checks because a lock cycle could
+ * introduce races with other writers.
+ */
+ ext4_clear_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA);
+
ret = ext4_dio_write_checks(iocb, from, &ilock_shared, &extend,
&unwritten, &dio_flags);
if (ret <= 0)
return ret;
- /*
- * Make sure inline data cannot be created anymore since we are going
- * to allocate blocks for DIO. We know the inode does not have any
- * inline data now because ext4_dio_supported() checked for that.
- */
- ext4_clear_inode_state(inode, EXT4_STATE_MAY_INLINE_DATA);
-
offset = iocb->ki_pos;
count = ret;
dio_flags, NULL, 0);
if (ret == -ENOTBLK)
ret = 0;
-
- if (extend)
- ret = ext4_handle_inode_extension(inode, offset, ret, count);
+ if (extend) {
+ /*
+ * We always perform extending DIO write synchronously so by
+ * now the IO is completed and ext4_handle_inode_extension()
+ * was called. Cleanup the inode in case of error or race with
+ * writeback of delalloc blocks.
+ */
+ WARN_ON_ONCE(ret == -EIOCBQUEUED);
+ ext4_inode_extension_cleanup(inode, ret);
+ }
out:
if (ilock_shared)
ret = dax_iomap_rw(iocb, from, &ext4_iomap_ops);
- if (extend)
- ret = ext4_handle_inode_extension(inode, offset, ret, count);
+ if (extend) {
+ ret = ext4_handle_inode_extension(inode, offset, ret);
+ ext4_inode_extension_cleanup(inode, ret);
+ }
out:
inode_unlock(inode);
if (ret > 0)
int ext4_get_block_unwritten(struct inode *inode, sector_t iblock,
struct buffer_head *bh_result, int create)
{
+ int ret = 0;
+
ext4_debug("ext4_get_block_unwritten: inode %lu, create flag %d\n",
inode->i_ino, create);
- return _ext4_get_block(inode, iblock, bh_result,
+ ret = _ext4_get_block(inode, iblock, bh_result,
EXT4_GET_BLOCKS_CREATE_UNWRIT_EXT);
+
+ /*
+ * If the buffer is marked unwritten, mark it as new to make sure it is
+ * zeroed out correctly in case of partial writes. Otherwise, there is
+ * a chance of stale data getting exposed.
+ */
+ if (ret == 0 && buffer_unwritten(bh_result))
+ set_buffer_new(bh_result);
+
+ return ret;
}
/* Maximum number of blocks we map for direct IO at once. */
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * KUnit test of ext4 multiblocks allocation.
+ */
+
+#include <kunit/test.h>
+#include <kunit/static_stub.h>
+
+#include "ext4.h"
+
+struct mbt_grp_ctx {
+ struct buffer_head bitmap_bh;
+ /* desc and gd_bh are just the place holders for now */
+ struct ext4_group_desc desc;
+ struct buffer_head gd_bh;
+};
+
+struct mbt_ctx {
+ struct mbt_grp_ctx *grp_ctx;
+};
+
+struct mbt_ext4_super_block {
+ struct super_block sb;
+ struct mbt_ctx mbt_ctx;
+};
+
+#define MBT_CTX(_sb) (&(container_of((_sb), struct mbt_ext4_super_block, sb)->mbt_ctx))
+#define MBT_GRP_CTX(_sb, _group) (&MBT_CTX(_sb)->grp_ctx[_group])
+
+static struct super_block *mbt_ext4_alloc_super_block(void)
+{
+ struct ext4_super_block *es = kzalloc(sizeof(*es), GFP_KERNEL);
+ struct ext4_sb_info *sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
+ struct mbt_ext4_super_block *fsb = kzalloc(sizeof(*fsb), GFP_KERNEL);
+
+ if (fsb == NULL || sbi == NULL || es == NULL)
+ goto out;
+
+ sbi->s_es = es;
+ fsb->sb.s_fs_info = sbi;
+ return &fsb->sb;
+
+out:
+ kfree(fsb);
+ kfree(sbi);
+ kfree(es);
+ return NULL;
+}
+
+static void mbt_ext4_free_super_block(struct super_block *sb)
+{
+ struct mbt_ext4_super_block *fsb =
+ container_of(sb, struct mbt_ext4_super_block, sb);
+ struct ext4_sb_info *sbi = EXT4_SB(sb);
+
+ kfree(sbi->s_es);
+ kfree(sbi);
+ kfree(fsb);
+}
+
+struct mbt_ext4_block_layout {
+ unsigned char blocksize_bits;
+ unsigned int cluster_bits;
+ uint32_t blocks_per_group;
+ ext4_group_t group_count;
+ uint16_t desc_size;
+};
+
+static void mbt_init_sb_layout(struct super_block *sb,
+ struct mbt_ext4_block_layout *layout)
+{
+ struct ext4_sb_info *sbi = EXT4_SB(sb);
+ struct ext4_super_block *es = sbi->s_es;
+
+ sb->s_blocksize = 1UL << layout->blocksize_bits;
+ sb->s_blocksize_bits = layout->blocksize_bits;
+
+ sbi->s_groups_count = layout->group_count;
+ sbi->s_blocks_per_group = layout->blocks_per_group;
+ sbi->s_cluster_bits = layout->cluster_bits;
+ sbi->s_cluster_ratio = 1U << layout->cluster_bits;
+ sbi->s_clusters_per_group = layout->blocks_per_group >>
+ layout->cluster_bits;
+ sbi->s_desc_size = layout->desc_size;
+
+ es->s_first_data_block = cpu_to_le32(0);
+ es->s_blocks_count_lo = cpu_to_le32(layout->blocks_per_group *
+ layout->group_count);
+}
+
+static int mbt_grp_ctx_init(struct super_block *sb,
+ struct mbt_grp_ctx *grp_ctx)
+{
+ grp_ctx->bitmap_bh.b_data = kzalloc(EXT4_BLOCK_SIZE(sb), GFP_KERNEL);
+ if (grp_ctx->bitmap_bh.b_data == NULL)
+ return -ENOMEM;
+
+ return 0;
+}
+
+static void mbt_grp_ctx_release(struct mbt_grp_ctx *grp_ctx)
+{
+ kfree(grp_ctx->bitmap_bh.b_data);
+ grp_ctx->bitmap_bh.b_data = NULL;
+}
+
+static void mbt_ctx_mark_used(struct super_block *sb, ext4_group_t group,
+ unsigned int start, unsigned int len)
+{
+ struct mbt_grp_ctx *grp_ctx = MBT_GRP_CTX(sb, group);
+
+ mb_set_bits(grp_ctx->bitmap_bh.b_data, start, len);
+}
+
+/* called after mbt_init_sb_layout */
+static int mbt_ctx_init(struct super_block *sb)
+{
+ struct mbt_ctx *ctx = MBT_CTX(sb);
+ ext4_group_t i, ngroups = ext4_get_groups_count(sb);
+
+ ctx->grp_ctx = kcalloc(ngroups, sizeof(struct mbt_grp_ctx),
+ GFP_KERNEL);
+ if (ctx->grp_ctx == NULL)
+ return -ENOMEM;
+
+ for (i = 0; i < ngroups; i++)
+ if (mbt_grp_ctx_init(sb, &ctx->grp_ctx[i]))
+ goto out;
+
+ /*
+ * first data block(first cluster in first group) is used by
+ * metadata, mark it used to avoid to alloc data block at first
+ * block which will fail ext4_sb_block_valid check.
+ */
+ mb_set_bits(ctx->grp_ctx[0].bitmap_bh.b_data, 0, 1);
+
+ return 0;
+out:
+ while (i-- > 0)
+ mbt_grp_ctx_release(&ctx->grp_ctx[i]);
+ kfree(ctx->grp_ctx);
+ return -ENOMEM;
+}
+
+static void mbt_ctx_release(struct super_block *sb)
+{
+ struct mbt_ctx *ctx = MBT_CTX(sb);
+ ext4_group_t i, ngroups = ext4_get_groups_count(sb);
+
+ for (i = 0; i < ngroups; i++)
+ mbt_grp_ctx_release(&ctx->grp_ctx[i]);
+ kfree(ctx->grp_ctx);
+}
+
+static struct buffer_head *
+ext4_read_block_bitmap_nowait_stub(struct super_block *sb, ext4_group_t block_group,
+ bool ignore_locked)
+{
+ struct mbt_grp_ctx *grp_ctx = MBT_GRP_CTX(sb, block_group);
+
+ /* paired with brelse from caller of ext4_read_block_bitmap_nowait */
+ get_bh(&grp_ctx->bitmap_bh);
+ return &grp_ctx->bitmap_bh;
+}
+
+static int ext4_wait_block_bitmap_stub(struct super_block *sb,
+ ext4_group_t block_group,
+ struct buffer_head *bh)
+{
+ return 0;
+}
+
+static struct ext4_group_desc *
+ext4_get_group_desc_stub(struct super_block *sb, ext4_group_t block_group,
+ struct buffer_head **bh)
+{
+ struct mbt_grp_ctx *grp_ctx = MBT_GRP_CTX(sb, block_group);
+
+ if (bh != NULL)
+ *bh = &grp_ctx->gd_bh;
+
+ return &grp_ctx->desc;
+}
+
+static int
+ext4_mb_mark_context_stub(handle_t *handle, struct super_block *sb, bool state,
+ ext4_group_t group, ext4_grpblk_t blkoff,
+ ext4_grpblk_t len, int flags,
+ ext4_grpblk_t *ret_changed)
+{
+ struct mbt_grp_ctx *grp_ctx = MBT_GRP_CTX(sb, group);
+ struct buffer_head *bitmap_bh = &grp_ctx->bitmap_bh;
+
+ if (state)
+ mb_set_bits(bitmap_bh->b_data, blkoff, len);
+ else
+ mb_clear_bits(bitmap_bh->b_data, blkoff, len);
+
+ return 0;
+}
+
+#define TEST_GOAL_GROUP 1
+static int mbt_kunit_init(struct kunit *test)
+{
+ struct mbt_ext4_block_layout *layout =
+ (struct mbt_ext4_block_layout *)(test->param_value);
+ struct super_block *sb;
+ int ret;
+
+ sb = mbt_ext4_alloc_super_block();
+ if (sb == NULL)
+ return -ENOMEM;
+
+ mbt_init_sb_layout(sb, layout);
+
+ ret = mbt_ctx_init(sb);
+ if (ret != 0) {
+ mbt_ext4_free_super_block(sb);
+ return ret;
+ }
+
+ test->priv = sb;
+ kunit_activate_static_stub(test,
+ ext4_read_block_bitmap_nowait,
+ ext4_read_block_bitmap_nowait_stub);
+ kunit_activate_static_stub(test,
+ ext4_wait_block_bitmap,
+ ext4_wait_block_bitmap_stub);
+ kunit_activate_static_stub(test,
+ ext4_get_group_desc,
+ ext4_get_group_desc_stub);
+ kunit_activate_static_stub(test,
+ ext4_mb_mark_context,
+ ext4_mb_mark_context_stub);
+ return 0;
+}
+
+static void mbt_kunit_exit(struct kunit *test)
+{
+ struct super_block *sb = (struct super_block *)test->priv;
+
+ mbt_ctx_release(sb);
+ mbt_ext4_free_super_block(sb);
+}
+
+static void test_new_blocks_simple(struct kunit *test)
+{
+ struct super_block *sb = (struct super_block *)test->priv;
+ struct inode inode = { .i_sb = sb, };
+ struct ext4_allocation_request ar;
+ ext4_group_t i, goal_group = TEST_GOAL_GROUP;
+ int err = 0;
+ ext4_fsblk_t found;
+ struct ext4_sb_info *sbi = EXT4_SB(sb);
+
+ ar.inode = &inode;
+
+ /* get block at goal */
+ ar.goal = ext4_group_first_block_no(sb, goal_group);
+ found = ext4_mb_new_blocks_simple(&ar, &err);
+ KUNIT_ASSERT_EQ_MSG(test, ar.goal, found,
+ "failed to alloc block at goal, expected %llu found %llu",
+ ar.goal, found);
+
+ /* get block after goal in goal group */
+ ar.goal = ext4_group_first_block_no(sb, goal_group);
+ found = ext4_mb_new_blocks_simple(&ar, &err);
+ KUNIT_ASSERT_EQ_MSG(test, ar.goal + EXT4_C2B(sbi, 1), found,
+ "failed to alloc block after goal in goal group, expected %llu found %llu",
+ ar.goal + 1, found);
+
+ /* get block after goal group */
+ mbt_ctx_mark_used(sb, goal_group, 0, EXT4_CLUSTERS_PER_GROUP(sb));
+ ar.goal = ext4_group_first_block_no(sb, goal_group);
+ found = ext4_mb_new_blocks_simple(&ar, &err);
+ KUNIT_ASSERT_EQ_MSG(test,
+ ext4_group_first_block_no(sb, goal_group + 1), found,
+ "failed to alloc block after goal group, expected %llu found %llu",
+ ext4_group_first_block_no(sb, goal_group + 1), found);
+
+ /* get block before goal group */
+ for (i = goal_group; i < ext4_get_groups_count(sb); i++)
+ mbt_ctx_mark_used(sb, i, 0, EXT4_CLUSTERS_PER_GROUP(sb));
+ ar.goal = ext4_group_first_block_no(sb, goal_group);
+ found = ext4_mb_new_blocks_simple(&ar, &err);
+ KUNIT_ASSERT_EQ_MSG(test,
+ ext4_group_first_block_no(sb, 0) + EXT4_C2B(sbi, 1), found,
+ "failed to alloc block before goal group, expected %llu found %llu",
+ ext4_group_first_block_no(sb, 0 + EXT4_C2B(sbi, 1)), found);
+
+ /* no block available, fail to allocate block */
+ for (i = 0; i < ext4_get_groups_count(sb); i++)
+ mbt_ctx_mark_used(sb, i, 0, EXT4_CLUSTERS_PER_GROUP(sb));
+ ar.goal = ext4_group_first_block_no(sb, goal_group);
+ found = ext4_mb_new_blocks_simple(&ar, &err);
+ KUNIT_ASSERT_NE_MSG(test, err, 0,
+ "unexpectedly get block when no block is available");
+}
+
+static const struct mbt_ext4_block_layout mbt_test_layouts[] = {
+ {
+ .blocksize_bits = 10,
+ .cluster_bits = 3,
+ .blocks_per_group = 8192,
+ .group_count = 4,
+ .desc_size = 64,
+ },
+ {
+ .blocksize_bits = 12,
+ .cluster_bits = 3,
+ .blocks_per_group = 8192,
+ .group_count = 4,
+ .desc_size = 64,
+ },
+ {
+ .blocksize_bits = 16,
+ .cluster_bits = 3,
+ .blocks_per_group = 8192,
+ .group_count = 4,
+ .desc_size = 64,
+ },
+};
+
+static void mbt_show_layout(const struct mbt_ext4_block_layout *layout,
+ char *desc)
+{
+ snprintf(desc, KUNIT_PARAM_DESC_SIZE, "block_bits=%d cluster_bits=%d "
+ "blocks_per_group=%d group_count=%d desc_size=%d\n",
+ layout->blocksize_bits, layout->cluster_bits,
+ layout->blocks_per_group, layout->group_count,
+ layout->desc_size);
+}
+KUNIT_ARRAY_PARAM(mbt_layouts, mbt_test_layouts, mbt_show_layout);
+
+static struct kunit_case mbt_test_cases[] = {
+ KUNIT_CASE_PARAM(test_new_blocks_simple, mbt_layouts_gen_params),
+ {}
+};
+
+static struct kunit_suite mbt_test_suite = {
+ .name = "ext4_mballoc_test",
+ .init = mbt_kunit_init,
+ .exit = mbt_kunit_exit,
+ .test_cases = mbt_test_cases,
+};
+
+kunit_test_suites(&mbt_test_suite);
+
+MODULE_LICENSE("GPL");
#include <linux/backing-dev.h>
#include <linux/freezer.h>
#include <trace/events/ext4.h>
+#include <kunit/static_stub.h>
/*
* MUSTDO:
static void ext4_mb_generate_from_pa(struct super_block *sb, void *bitmap,
ext4_group_t group);
-static void ext4_mb_generate_from_freelist(struct super_block *sb, void *bitmap,
- ext4_group_t group);
static void ext4_mb_new_preallocation(struct ext4_allocation_context *ac);
static bool ext4_mb_good_group(struct ext4_allocation_context *ac,
* We place the buddy block and bitmap block
* close together
*/
+ grinfo = ext4_get_group_info(sb, group);
+ if (!grinfo) {
+ err = -EFSCORRUPTED;
+ goto out;
+ }
if ((first_block + i) & 1) {
/* this is block of buddy */
BUG_ON(incore == NULL);
mb_debug(sb, "put buddy for group %u in page %lu/%x\n",
group, page->index, i * blocksize);
trace_ext4_mb_buddy_bitmap_load(sb, group);
- grinfo = ext4_get_group_info(sb, group);
- if (!grinfo) {
- err = -EFSCORRUPTED;
- goto out;
- }
grinfo->bb_fragments = 0;
memset(grinfo->bb_counters, 0,
sizeof(*grinfo->bb_counters) *
/* mark all preallocated blks used in in-core bitmap */
ext4_mb_generate_from_pa(sb, data, group);
- ext4_mb_generate_from_freelist(sb, data, group);
+ WARN_ON_ONCE(!RB_EMPTY_ROOT(&grinfo->bb_free_root));
ext4_unlock_group(sb, group);
/* set incore so that the buddy information can be
spin_lock_init(&sbi->s_md_lock);
sbi->s_mb_free_pending = 0;
- INIT_LIST_HEAD(&sbi->s_freed_data_list);
+ INIT_LIST_HEAD(&sbi->s_freed_data_list[0]);
+ INIT_LIST_HEAD(&sbi->s_freed_data_list[1]);
INIT_LIST_HEAD(&sbi->s_discard_list);
INIT_WORK(&sbi->s_discard_work, ext4_discard_work);
atomic_set(&sbi->s_retry_alloc_pending, 0);
struct ext4_sb_info *sbi = EXT4_SB(sb);
struct ext4_free_data *entry, *tmp;
LIST_HEAD(freed_data_list);
- struct list_head *cut_pos = NULL;
+ struct list_head *s_freed_head = &sbi->s_freed_data_list[commit_tid & 1];
bool wake;
- spin_lock(&sbi->s_md_lock);
- list_for_each_entry(entry, &sbi->s_freed_data_list, efd_list) {
- if (entry->efd_tid != commit_tid)
- break;
- cut_pos = &entry->efd_list;
- }
- if (cut_pos)
- list_cut_position(&freed_data_list, &sbi->s_freed_data_list,
- cut_pos);
- spin_unlock(&sbi->s_md_lock);
+ list_replace_init(s_freed_head, &freed_data_list);
list_for_each_entry(entry, &freed_data_list, efd_list)
ext4_free_data_in_buddy(sb, entry);
ext4_groupinfo_destroy_slabs();
}
+#define EXT4_MB_BITMAP_MARKED_CHECK 0x0001
+#define EXT4_MB_SYNC_UPDATE 0x0002
+static int
+ext4_mb_mark_context(handle_t *handle, struct super_block *sb, bool state,
+ ext4_group_t group, ext4_grpblk_t blkoff,
+ ext4_grpblk_t len, int flags, ext4_grpblk_t *ret_changed)
+{
+ struct ext4_sb_info *sbi = EXT4_SB(sb);
+ struct buffer_head *bitmap_bh = NULL;
+ struct ext4_group_desc *gdp;
+ struct buffer_head *gdp_bh;
+ int err;
+ unsigned int i, already, changed = len;
+
+ KUNIT_STATIC_STUB_REDIRECT(ext4_mb_mark_context,
+ handle, sb, state, group, blkoff, len,
+ flags, ret_changed);
+
+ if (ret_changed)
+ *ret_changed = 0;
+ bitmap_bh = ext4_read_block_bitmap(sb, group);
+ if (IS_ERR(bitmap_bh))
+ return PTR_ERR(bitmap_bh);
+
+ if (handle) {
+ BUFFER_TRACE(bitmap_bh, "getting write access");
+ err = ext4_journal_get_write_access(handle, sb, bitmap_bh,
+ EXT4_JTR_NONE);
+ if (err)
+ goto out_err;
+ }
+
+ err = -EIO;
+ gdp = ext4_get_group_desc(sb, group, &gdp_bh);
+ if (!gdp)
+ goto out_err;
+
+ if (handle) {
+ BUFFER_TRACE(gdp_bh, "get_write_access");
+ err = ext4_journal_get_write_access(handle, sb, gdp_bh,
+ EXT4_JTR_NONE);
+ if (err)
+ goto out_err;
+ }
+
+ ext4_lock_group(sb, group);
+ if (ext4_has_group_desc_csum(sb) &&
+ (gdp->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT))) {
+ gdp->bg_flags &= cpu_to_le16(~EXT4_BG_BLOCK_UNINIT);
+ ext4_free_group_clusters_set(sb, gdp,
+ ext4_free_clusters_after_init(sb, group, gdp));
+ }
+
+ if (flags & EXT4_MB_BITMAP_MARKED_CHECK) {
+ already = 0;
+ for (i = 0; i < len; i++)
+ if (mb_test_bit(blkoff + i, bitmap_bh->b_data) ==
+ state)
+ already++;
+ changed = len - already;
+ }
+
+ if (state) {
+ mb_set_bits(bitmap_bh->b_data, blkoff, len);
+ ext4_free_group_clusters_set(sb, gdp,
+ ext4_free_group_clusters(sb, gdp) - changed);
+ } else {
+ mb_clear_bits(bitmap_bh->b_data, blkoff, len);
+ ext4_free_group_clusters_set(sb, gdp,
+ ext4_free_group_clusters(sb, gdp) + changed);
+ }
+
+ ext4_block_bitmap_csum_set(sb, gdp, bitmap_bh);
+ ext4_group_desc_csum_set(sb, group, gdp);
+ ext4_unlock_group(sb, group);
+ if (ret_changed)
+ *ret_changed = changed;
+
+ if (sbi->s_log_groups_per_flex) {
+ ext4_group_t flex_group = ext4_flex_group(sbi, group);
+ struct flex_groups *fg = sbi_array_rcu_deref(sbi,
+ s_flex_groups, flex_group);
+
+ if (state)
+ atomic64_sub(changed, &fg->free_clusters);
+ else
+ atomic64_add(changed, &fg->free_clusters);
+ }
+
+ err = ext4_handle_dirty_metadata(handle, NULL, bitmap_bh);
+ if (err)
+ goto out_err;
+ err = ext4_handle_dirty_metadata(handle, NULL, gdp_bh);
+ if (err)
+ goto out_err;
+
+ if (flags & EXT4_MB_SYNC_UPDATE) {
+ sync_dirty_buffer(bitmap_bh);
+ sync_dirty_buffer(gdp_bh);
+ }
+
+out_err:
+ brelse(bitmap_bh);
+ return err;
+}
/*
* Check quota and mark chosen space (ac->ac_b_ex) non-free in bitmaps
ext4_mb_mark_diskspace_used(struct ext4_allocation_context *ac,
handle_t *handle, unsigned int reserv_clstrs)
{
- struct buffer_head *bitmap_bh = NULL;
struct ext4_group_desc *gdp;
- struct buffer_head *gdp_bh;
struct ext4_sb_info *sbi;
struct super_block *sb;
ext4_fsblk_t block;
int err, len;
+ int flags = 0;
+ ext4_grpblk_t changed;
BUG_ON(ac->ac_status != AC_STATUS_FOUND);
BUG_ON(ac->ac_b_ex.fe_len <= 0);
sb = ac->ac_sb;
sbi = EXT4_SB(sb);
- bitmap_bh = ext4_read_block_bitmap(sb, ac->ac_b_ex.fe_group);
- if (IS_ERR(bitmap_bh)) {
- return PTR_ERR(bitmap_bh);
- }
-
- BUFFER_TRACE(bitmap_bh, "getting write access");
- err = ext4_journal_get_write_access(handle, sb, bitmap_bh,
- EXT4_JTR_NONE);
- if (err)
- goto out_err;
-
- err = -EIO;
- gdp = ext4_get_group_desc(sb, ac->ac_b_ex.fe_group, &gdp_bh);
+ gdp = ext4_get_group_desc(sb, ac->ac_b_ex.fe_group, NULL);
if (!gdp)
- goto out_err;
-
+ return -EIO;
ext4_debug("using block group %u(%d)\n", ac->ac_b_ex.fe_group,
ext4_free_group_clusters(sb, gdp));
- BUFFER_TRACE(gdp_bh, "get_write_access");
- err = ext4_journal_get_write_access(handle, sb, gdp_bh, EXT4_JTR_NONE);
- if (err)
- goto out_err;
-
block = ext4_grp_offs_to_block(sb, &ac->ac_b_ex);
-
len = EXT4_C2B(sbi, ac->ac_b_ex.fe_len);
if (!ext4_inode_block_valid(ac->ac_inode, block, len)) {
ext4_error(sb, "Allocating blocks %llu-%llu which overlap "
* Fix the bitmap and return EFSCORRUPTED
* We leak some of the blocks here.
*/
- ext4_lock_group(sb, ac->ac_b_ex.fe_group);
- mb_set_bits(bitmap_bh->b_data, ac->ac_b_ex.fe_start,
- ac->ac_b_ex.fe_len);
- ext4_unlock_group(sb, ac->ac_b_ex.fe_group);
- err = ext4_handle_dirty_metadata(handle, NULL, bitmap_bh);
+ err = ext4_mb_mark_context(handle, sb, true,
+ ac->ac_b_ex.fe_group,
+ ac->ac_b_ex.fe_start,
+ ac->ac_b_ex.fe_len,
+ 0, NULL);
if (!err)
err = -EFSCORRUPTED;
- goto out_err;
+ return err;
}
- ext4_lock_group(sb, ac->ac_b_ex.fe_group);
#ifdef AGGRESSIVE_CHECK
- {
- int i;
- for (i = 0; i < ac->ac_b_ex.fe_len; i++) {
- BUG_ON(mb_test_bit(ac->ac_b_ex.fe_start + i,
- bitmap_bh->b_data));
- }
- }
+ flags |= EXT4_MB_BITMAP_MARKED_CHECK;
#endif
- mb_set_bits(bitmap_bh->b_data, ac->ac_b_ex.fe_start,
- ac->ac_b_ex.fe_len);
- if (ext4_has_group_desc_csum(sb) &&
- (gdp->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT))) {
- gdp->bg_flags &= cpu_to_le16(~EXT4_BG_BLOCK_UNINIT);
- ext4_free_group_clusters_set(sb, gdp,
- ext4_free_clusters_after_init(sb,
- ac->ac_b_ex.fe_group, gdp));
- }
- len = ext4_free_group_clusters(sb, gdp) - ac->ac_b_ex.fe_len;
- ext4_free_group_clusters_set(sb, gdp, len);
- ext4_block_bitmap_csum_set(sb, gdp, bitmap_bh);
- ext4_group_desc_csum_set(sb, ac->ac_b_ex.fe_group, gdp);
+ err = ext4_mb_mark_context(handle, sb, true, ac->ac_b_ex.fe_group,
+ ac->ac_b_ex.fe_start, ac->ac_b_ex.fe_len,
+ flags, &changed);
+
+ if (err && changed == 0)
+ return err;
- ext4_unlock_group(sb, ac->ac_b_ex.fe_group);
+#ifdef AGGRESSIVE_CHECK
+ BUG_ON(changed != ac->ac_b_ex.fe_len);
+#endif
percpu_counter_sub(&sbi->s_freeclusters_counter, ac->ac_b_ex.fe_len);
/*
* Now reduce the dirty block count also. Should not go negative
percpu_counter_sub(&sbi->s_dirtyclusters_counter,
reserv_clstrs);
- if (sbi->s_log_groups_per_flex) {
- ext4_group_t flex_group = ext4_flex_group(sbi,
- ac->ac_b_ex.fe_group);
- atomic64_sub(ac->ac_b_ex.fe_len,
- &sbi_array_rcu_deref(sbi, s_flex_groups,
- flex_group)->free_clusters);
- }
-
- err = ext4_handle_dirty_metadata(handle, NULL, bitmap_bh);
- if (err)
- goto out_err;
- err = ext4_handle_dirty_metadata(handle, NULL, gdp_bh);
-
-out_err:
- brelse(bitmap_bh);
return err;
}
* blocks in bitmaps and update counters.
*/
void ext4_mb_mark_bb(struct super_block *sb, ext4_fsblk_t block,
- int len, int state)
+ int len, bool state)
{
- struct buffer_head *bitmap_bh = NULL;
- struct ext4_group_desc *gdp;
- struct buffer_head *gdp_bh;
struct ext4_sb_info *sbi = EXT4_SB(sb);
ext4_group_t group;
ext4_grpblk_t blkoff;
- int i, err = 0;
- int already;
- unsigned int clen, clen_changed, thisgrp_len;
+ int err = 0;
+ unsigned int clen, thisgrp_len;
while (len > 0) {
ext4_get_group_no_and_offset(sb, block, &group, &blkoff);
ext4_error(sb, "Marking blocks in system zone - "
"Block = %llu, len = %u",
block, thisgrp_len);
- bitmap_bh = NULL;
- break;
- }
-
- bitmap_bh = ext4_read_block_bitmap(sb, group);
- if (IS_ERR(bitmap_bh)) {
- err = PTR_ERR(bitmap_bh);
- bitmap_bh = NULL;
break;
}
- err = -EIO;
- gdp = ext4_get_group_desc(sb, group, &gdp_bh);
- if (!gdp)
- break;
-
- ext4_lock_group(sb, group);
- already = 0;
- for (i = 0; i < clen; i++)
- if (!mb_test_bit(blkoff + i, bitmap_bh->b_data) ==
- !state)
- already++;
-
- clen_changed = clen - already;
- if (state)
- mb_set_bits(bitmap_bh->b_data, blkoff, clen);
- else
- mb_clear_bits(bitmap_bh->b_data, blkoff, clen);
- if (ext4_has_group_desc_csum(sb) &&
- (gdp->bg_flags & cpu_to_le16(EXT4_BG_BLOCK_UNINIT))) {
- gdp->bg_flags &= cpu_to_le16(~EXT4_BG_BLOCK_UNINIT);
- ext4_free_group_clusters_set(sb, gdp,
- ext4_free_clusters_after_init(sb, group, gdp));
- }
- if (state)
- clen = ext4_free_group_clusters(sb, gdp) - clen_changed;
- else
- clen = ext4_free_group_clusters(sb, gdp) + clen_changed;
-
- ext4_free_group_clusters_set(sb, gdp, clen);
- ext4_block_bitmap_csum_set(sb, gdp, bitmap_bh);
- ext4_group_desc_csum_set(sb, group, gdp);
-
- ext4_unlock_group(sb, group);
-
- if (sbi->s_log_groups_per_flex) {
- ext4_group_t flex_group = ext4_flex_group(sbi, group);
- struct flex_groups *fg = sbi_array_rcu_deref(sbi,
- s_flex_groups, flex_group);
-
- if (state)
- atomic64_sub(clen_changed, &fg->free_clusters);
- else
- atomic64_add(clen_changed, &fg->free_clusters);
-
- }
-
- err = ext4_handle_dirty_metadata(NULL, NULL, bitmap_bh);
- if (err)
- break;
- sync_dirty_buffer(bitmap_bh);
- err = ext4_handle_dirty_metadata(NULL, NULL, gdp_bh);
- sync_dirty_buffer(gdp_bh);
+ err = ext4_mb_mark_context(NULL, sb, state,
+ group, blkoff, clen,
+ EXT4_MB_BITMAP_MARKED_CHECK |
+ EXT4_MB_SYNC_UPDATE,
+ NULL);
if (err)
break;
block += thisgrp_len;
len -= thisgrp_len;
- brelse(bitmap_bh);
BUG_ON(len < 0);
}
-
- if (err)
- brelse(bitmap_bh);
}
/*
return false;
}
-/*
- * the function goes through all block freed in the group
- * but not yet committed and marks them used in in-core bitmap.
- * buddy must be generated from this bitmap
- * Need to be called with the ext4 group lock held
- */
-static void ext4_mb_generate_from_freelist(struct super_block *sb, void *bitmap,
- ext4_group_t group)
-{
- struct rb_node *n;
- struct ext4_group_info *grp;
- struct ext4_free_data *entry;
-
- grp = ext4_get_group_info(sb, group);
- if (!grp)
- return;
- n = rb_first(&(grp->bb_free_root));
-
- while (n) {
- entry = rb_entry(n, struct ext4_free_data, efd_node);
- mb_set_bits(bitmap, entry->efd_start_cluster, entry->efd_count);
- n = rb_next(n);
- }
-}
-
/*
* the function goes through all preallocation in this group and marks them
* used in in-core bitmap. buddy must be generated from this bitmap
}
block = ext4_group_first_block_no(sb, group) + EXT4_C2B(sbi, i);
- ext4_mb_mark_bb(sb, block, 1, 1);
+ ext4_mb_mark_bb(sb, block, 1, true);
ar->len = 1;
return block;
}
spin_lock(&sbi->s_md_lock);
- list_add_tail(&new_entry->efd_list, &sbi->s_freed_data_list);
+ list_add_tail(&new_entry->efd_list, &sbi->s_freed_data_list[new_entry->efd_tid & 1]);
sbi->s_mb_free_pending += clusters;
spin_unlock(&sbi->s_md_lock);
}
static void ext4_free_blocks_simple(struct inode *inode, ext4_fsblk_t block,
unsigned long count)
{
- struct buffer_head *bitmap_bh;
struct super_block *sb = inode->i_sb;
- struct ext4_group_desc *gdp;
- struct buffer_head *gdp_bh;
ext4_group_t group;
ext4_grpblk_t blkoff;
- int already_freed = 0, err, i;
ext4_get_group_no_and_offset(sb, block, &group, &blkoff);
- bitmap_bh = ext4_read_block_bitmap(sb, group);
- if (IS_ERR(bitmap_bh)) {
- pr_warn("Failed to read block bitmap\n");
- return;
- }
- gdp = ext4_get_group_desc(sb, group, &gdp_bh);
- if (!gdp)
- goto err_out;
-
- for (i = 0; i < count; i++) {
- if (!mb_test_bit(blkoff + i, bitmap_bh->b_data))
- already_freed++;
- }
- mb_clear_bits(bitmap_bh->b_data, blkoff, count);
- err = ext4_handle_dirty_metadata(NULL, NULL, bitmap_bh);
- if (err)
- goto err_out;
- ext4_free_group_clusters_set(
- sb, gdp, ext4_free_group_clusters(sb, gdp) +
- count - already_freed);
- ext4_block_bitmap_csum_set(sb, gdp, bitmap_bh);
- ext4_group_desc_csum_set(sb, group, gdp);
- ext4_handle_dirty_metadata(NULL, NULL, gdp_bh);
- sync_dirty_buffer(bitmap_bh);
- sync_dirty_buffer(gdp_bh);
-
-err_out:
- brelse(bitmap_bh);
+ ext4_mb_mark_context(NULL, sb, false, group, blkoff, count,
+ EXT4_MB_BITMAP_MARKED_CHECK |
+ EXT4_MB_SYNC_UPDATE,
+ NULL);
}
/**
ext4_fsblk_t block, unsigned long count,
int flags)
{
- struct buffer_head *bitmap_bh = NULL;
struct super_block *sb = inode->i_sb;
- struct ext4_group_desc *gdp;
struct ext4_group_info *grp;
unsigned int overflow;
ext4_grpblk_t bit;
- struct buffer_head *gd_bh;
ext4_group_t block_group;
struct ext4_sb_info *sbi;
struct ext4_buddy e4b;
unsigned int count_clusters;
int err = 0;
- int ret;
+ int mark_flags = 0;
+ ext4_grpblk_t changed;
sbi = EXT4_SB(sb);
ext4_error(sb, "Freeing blocks in system zone - "
"Block = %llu, count = %lu", block, count);
/* err = 0. ext4_std_error should be a no op */
- goto error_return;
+ goto error_out;
}
flags |= EXT4_FREE_BLOCKS_VALIDATED;
flags &= ~EXT4_FREE_BLOCKS_VALIDATED;
}
count_clusters = EXT4_NUM_B2C(sbi, count);
- bitmap_bh = ext4_read_block_bitmap(sb, block_group);
- if (IS_ERR(bitmap_bh)) {
- err = PTR_ERR(bitmap_bh);
- bitmap_bh = NULL;
- goto error_return;
- }
- gdp = ext4_get_group_desc(sb, block_group, &gd_bh);
- if (!gdp) {
- err = -EIO;
- goto error_return;
- }
+ trace_ext4_mballoc_free(sb, inode, block_group, bit, count_clusters);
+
+ /* __GFP_NOFAIL: retry infinitely, ignore TIF_MEMDIE and memcg limit. */
+ err = ext4_mb_load_buddy_gfp(sb, block_group, &e4b,
+ GFP_NOFS|__GFP_NOFAIL);
+ if (err)
+ goto error_out;
if (!(flags & EXT4_FREE_BLOCKS_VALIDATED) &&
!ext4_inode_block_valid(inode, block, count)) {
ext4_error(sb, "Freeing blocks in system zone - "
"Block = %llu, count = %lu", block, count);
/* err = 0. ext4_std_error should be a no op */
- goto error_return;
+ goto error_clean;
}
- BUFFER_TRACE(bitmap_bh, "getting write access");
- err = ext4_journal_get_write_access(handle, sb, bitmap_bh,
- EXT4_JTR_NONE);
- if (err)
- goto error_return;
-
- /*
- * We are about to modify some metadata. Call the journal APIs
- * to unshare ->b_data if a currently-committing transaction is
- * using it
- */
- BUFFER_TRACE(gd_bh, "get_write_access");
- err = ext4_journal_get_write_access(handle, sb, gd_bh, EXT4_JTR_NONE);
- if (err)
- goto error_return;
#ifdef AGGRESSIVE_CHECK
- {
- int i;
- for (i = 0; i < count_clusters; i++)
- BUG_ON(!mb_test_bit(bit + i, bitmap_bh->b_data));
- }
+ mark_flags |= EXT4_MB_BITMAP_MARKED_CHECK;
#endif
- trace_ext4_mballoc_free(sb, inode, block_group, bit, count_clusters);
+ err = ext4_mb_mark_context(handle, sb, false, block_group, bit,
+ count_clusters, mark_flags, &changed);
- /* __GFP_NOFAIL: retry infinitely, ignore TIF_MEMDIE and memcg limit. */
- err = ext4_mb_load_buddy_gfp(sb, block_group, &e4b,
- GFP_NOFS|__GFP_NOFAIL);
- if (err)
- goto error_return;
+
+ if (err && changed == 0)
+ goto error_clean;
+
+#ifdef AGGRESSIVE_CHECK
+ BUG_ON(changed != count_clusters);
+#endif
/*
* We need to make sure we don't reuse the freed block until after the
new_entry->efd_tid = handle->h_transaction->t_tid;
ext4_lock_group(sb, block_group);
- mb_clear_bits(bitmap_bh->b_data, bit, count_clusters);
ext4_mb_free_metadata(handle, &e4b, new_entry);
} else {
- /* need to update group_info->bb_free and bitmap
- * with group lock held. generate_buddy look at
- * them with group lock_held
- */
if (test_opt(sb, DISCARD)) {
err = ext4_issue_discard(sb, block_group, bit,
count_clusters, NULL);
EXT4_MB_GRP_CLEAR_TRIMMED(e4b.bd_info);
ext4_lock_group(sb, block_group);
- mb_clear_bits(bitmap_bh->b_data, bit, count_clusters);
mb_free_blocks(inode, &e4b, bit, count_clusters);
}
- ret = ext4_free_group_clusters(sb, gdp) + count_clusters;
- ext4_free_group_clusters_set(sb, gdp, ret);
- ext4_block_bitmap_csum_set(sb, gdp, bitmap_bh);
- ext4_group_desc_csum_set(sb, block_group, gdp);
ext4_unlock_group(sb, block_group);
- if (sbi->s_log_groups_per_flex) {
- ext4_group_t flex_group = ext4_flex_group(sbi, block_group);
- atomic64_add(count_clusters,
- &sbi_array_rcu_deref(sbi, s_flex_groups,
- flex_group)->free_clusters);
- }
-
/*
* on a bigalloc file system, defer the s_freeclusters_counter
* update to the caller (ext4_remove_space and friends) so they
count_clusters);
}
- ext4_mb_unload_buddy(&e4b);
-
- /* We dirtied the bitmap block */
- BUFFER_TRACE(bitmap_bh, "dirtied bitmap block");
- err = ext4_handle_dirty_metadata(handle, NULL, bitmap_bh);
-
- /* And the group descriptor block */
- BUFFER_TRACE(gd_bh, "dirtied group descriptor block");
- ret = ext4_handle_dirty_metadata(handle, NULL, gd_bh);
- if (!err)
- err = ret;
-
if (overflow && !err) {
block += count;
count = overflow;
- put_bh(bitmap_bh);
+ ext4_mb_unload_buddy(&e4b);
/* The range changed so it's no longer validated */
flags &= ~EXT4_FREE_BLOCKS_VALIDATED;
goto do_more;
}
-error_return:
- brelse(bitmap_bh);
+
+error_clean:
+ ext4_mb_unload_buddy(&e4b);
+error_out:
ext4_std_error(sb, err);
}
int ext4_group_add_blocks(handle_t *handle, struct super_block *sb,
ext4_fsblk_t block, unsigned long count)
{
- struct buffer_head *bitmap_bh = NULL;
- struct buffer_head *gd_bh;
ext4_group_t block_group;
ext4_grpblk_t bit;
- unsigned int i;
- struct ext4_group_desc *desc;
struct ext4_sb_info *sbi = EXT4_SB(sb);
struct ext4_buddy e4b;
- int err = 0, ret, free_clusters_count;
- ext4_grpblk_t clusters_freed;
+ int err = 0;
ext4_fsblk_t first_cluster = EXT4_B2C(sbi, block);
ext4_fsblk_t last_cluster = EXT4_B2C(sbi, block + count - 1);
unsigned long cluster_count = last_cluster - first_cluster + 1;
+ ext4_grpblk_t changed;
ext4_debug("Adding block(s) %llu-%llu\n", block, block + count - 1);
- if (count == 0)
+ if (cluster_count == 0)
return 0;
ext4_get_group_no_and_offset(sb, block, &block_group, &bit);
ext4_warning(sb, "too many blocks added to group %u",
block_group);
err = -EINVAL;
- goto error_return;
- }
-
- bitmap_bh = ext4_read_block_bitmap(sb, block_group);
- if (IS_ERR(bitmap_bh)) {
- err = PTR_ERR(bitmap_bh);
- bitmap_bh = NULL;
- goto error_return;
+ goto error_out;
}
- desc = ext4_get_group_desc(sb, block_group, &gd_bh);
- if (!desc) {
- err = -EIO;
- goto error_return;
- }
+ err = ext4_mb_load_buddy(sb, block_group, &e4b);
+ if (err)
+ goto error_out;
if (!ext4_sb_block_valid(sb, NULL, block, count)) {
ext4_error(sb, "Adding blocks in system zones - "
"Block = %llu, count = %lu",
block, count);
err = -EINVAL;
- goto error_return;
+ goto error_clean;
}
- BUFFER_TRACE(bitmap_bh, "getting write access");
- err = ext4_journal_get_write_access(handle, sb, bitmap_bh,
- EXT4_JTR_NONE);
- if (err)
- goto error_return;
-
- /*
- * We are about to modify some metadata. Call the journal APIs
- * to unshare ->b_data if a currently-committing transaction is
- * using it
- */
- BUFFER_TRACE(gd_bh, "get_write_access");
- err = ext4_journal_get_write_access(handle, sb, gd_bh, EXT4_JTR_NONE);
- if (err)
- goto error_return;
-
- for (i = 0, clusters_freed = 0; i < cluster_count; i++) {
- BUFFER_TRACE(bitmap_bh, "clear bit");
- if (!mb_test_bit(bit + i, bitmap_bh->b_data)) {
- ext4_error(sb, "bit already cleared for block %llu",
- (ext4_fsblk_t)(block + i));
- BUFFER_TRACE(bitmap_bh, "bit already cleared");
- } else {
- clusters_freed++;
- }
- }
+ err = ext4_mb_mark_context(handle, sb, false, block_group, bit,
+ cluster_count, EXT4_MB_BITMAP_MARKED_CHECK,
+ &changed);
+ if (err && changed == 0)
+ goto error_clean;
- err = ext4_mb_load_buddy(sb, block_group, &e4b);
- if (err)
- goto error_return;
+ if (changed != cluster_count)
+ ext4_error(sb, "bit already cleared in group %u", block_group);
- /*
- * need to update group_info->bb_free and bitmap
- * with group lock held. generate_buddy look at
- * them with group lock_held
- */
ext4_lock_group(sb, block_group);
- mb_clear_bits(bitmap_bh->b_data, bit, cluster_count);
mb_free_blocks(NULL, &e4b, bit, cluster_count);
- free_clusters_count = clusters_freed +
- ext4_free_group_clusters(sb, desc);
- ext4_free_group_clusters_set(sb, desc, free_clusters_count);
- ext4_block_bitmap_csum_set(sb, desc, bitmap_bh);
- ext4_group_desc_csum_set(sb, block_group, desc);
ext4_unlock_group(sb, block_group);
percpu_counter_add(&sbi->s_freeclusters_counter,
- clusters_freed);
-
- if (sbi->s_log_groups_per_flex) {
- ext4_group_t flex_group = ext4_flex_group(sbi, block_group);
- atomic64_add(clusters_freed,
- &sbi_array_rcu_deref(sbi, s_flex_groups,
- flex_group)->free_clusters);
- }
+ changed);
+error_clean:
ext4_mb_unload_buddy(&e4b);
-
- /* We dirtied the bitmap block */
- BUFFER_TRACE(bitmap_bh, "dirtied bitmap block");
- err = ext4_handle_dirty_metadata(handle, NULL, bitmap_bh);
-
- /* And the group descriptor block */
- BUFFER_TRACE(gd_bh, "dirtied group descriptor block");
- ret = ext4_handle_dirty_metadata(handle, NULL, gd_bh);
- if (!err)
- err = ret;
-
-error_return:
- brelse(bitmap_bh);
+error_out:
ext4_std_error(sb, err);
return err;
}
return error;
}
+
+#ifdef CONFIG_EXT4_KUNIT_TESTS
+#include "mballoc-test.c"
+#endif
top = data2 + len;
while ((char *)(de2 = ext4_next_entry(de, blocksize)) < top) {
if (ext4_check_dir_entry(dir, NULL, de, bh2, data2, len,
- (data2 + (blocksize - csum_size) -
- (char *) de))) {
+ (char *)de - data2)) {
brelse(bh2);
brelse(bh);
return -EFSCORRUPTED;
*/
-#define EXT4FS_DEBUG
-
#include <linux/errno.h>
#include <linux/slab.h>
#include <linux/jiffies.h>
* If the reserved GDT blocks is non-zero, the resize_inode feature
* should always be set.
*/
- if (EXT4_SB(sb)->s_es->s_reserved_gdt_blocks &&
+ if (sbi->s_es->s_reserved_gdt_blocks &&
!ext4_has_feature_resize_inode(sb)) {
ext4_error(sb, "resize_inode disabled but reserved GDT blocks non-zero");
return -EFSCORRUPTED;
* bad time to do it anyways.
*/
if (EXT4_B2C(sbi, sbi->s_sbh->b_blocknr) !=
- le32_to_cpu(EXT4_SB(sb)->s_es->s_first_data_block)) {
+ le32_to_cpu(sbi->s_es->s_first_data_block)) {
ext4_warning(sb, "won't resize using backup superblock at %llu",
- (unsigned long long)EXT4_SB(sb)->s_sbh->b_blocknr);
+ (unsigned long long)sbi->s_sbh->b_blocknr);
return -EPERM;
}
* We are not allowed to do online-resizing on a filesystem mounted
* with error, because it can destroy the filesystem easily.
*/
- if (EXT4_SB(sb)->s_mount_state & EXT4_ERROR_FS) {
+ if (sbi->s_mount_state & EXT4_ERROR_FS) {
ext4_warning(sb, "There are errors in the filesystem, "
"so online resizing is not allowed");
return -EPERM;
}
if (test_and_set_bit_lock(EXT4_FLAGS_RESIZING,
- &EXT4_SB(sb)->s_ext4_flags))
+ &sbi->s_ext4_flags))
ret = -EBUSY;
return ret;
return 0;
}
-static ext4_group_t ext4_meta_bg_first_group(struct super_block *sb,
- ext4_group_t group) {
- return (group >> EXT4_DESC_PER_BLOCK_BITS(sb)) <<
- EXT4_DESC_PER_BLOCK_BITS(sb);
-}
-
-static ext4_fsblk_t ext4_meta_bg_first_block_no(struct super_block *sb,
- ext4_group_t group) {
- group = ext4_meta_bg_first_group(sb, group);
- return ext4_group_first_block_no(sb, group);
-}
-
static ext4_grpblk_t ext4_group_overhead_blocks(struct super_block *sb,
ext4_group_t group) {
ext4_grpblk_t overhead;
overhead = ext4_group_overhead_blocks(sb, group);
metaend = start + overhead;
- input->free_clusters_count = free_blocks_count =
- input->blocks_count - 2 - overhead - sbi->s_itb_per_group;
+ free_blocks_count = input->blocks_count - 2 - overhead -
+ sbi->s_itb_per_group;
+ input->free_clusters_count = EXT4_B2C(sbi, free_blocks_count);
if (test_opt(sb, DEBUG))
printk(KERN_DEBUG "EXT4-fs: adding %s group %u: %u blocks "
ext4_debug("mark clusters [%llu-%llu] used\n", first_cluster,
last_cluster);
- for (count2 = count; count > 0;
- count -= count2, first_cluster += count2) {
+ for (; count > 0; count -= count2, first_cluster += count2) {
ext4_fsblk_t start;
struct buffer_head *bh;
ext4_group_t group;
if (meta_bg == 0 && !ext4_bg_has_super(sb, group))
goto handle_itb;
- if (meta_bg == 1) {
- ext4_group_t first_group;
- first_group = ext4_meta_bg_first_group(sb, group);
- if (first_group != group + 1 &&
- first_group != group + EXT4_DESC_PER_BLOCK(sb) - 1)
- goto handle_itb;
- }
+ if (meta_bg == 1)
+ goto handle_itb;
block = start + ext4_bg_has_super(sb, group);
/* Copy all of the GDT blocks into the backup in this group */
}
handle_itb:
- /* Initialize group tables of the grop @group */
+ /* Initialize group tables of the group @group */
if (!(bg_flags[i] & EXT4_BG_INODE_ZEROED))
goto handle_bb;
block = start;
}
- if (count) {
- err = set_flexbg_block_bitmap(sb, handle,
- flex_gd,
- EXT4_B2C(sbi, start),
- EXT4_B2C(sbi,
- start + count
- - 1));
- if (err)
- goto out;
- }
+ err = set_flexbg_block_bitmap(sb, handle,
+ flex_gd,
+ EXT4_B2C(sbi, start),
+ EXT4_B2C(sbi,
+ start + count
+ - 1));
+ if (err)
+ goto out;
}
out:
}
/*
- * add_new_gdb_meta_bg is the sister of add_new_gdb.
+ * If there is no available space in the existing block group descriptors for
+ * the new block group and there are no reserved block group descriptors, then
+ * the meta_bg feature will get enabled, and es->s_first_meta_bg will get set
+ * to the first block group that is managed using meta_bg and s_first_meta_bg
+ * must be a multiple of EXT4_DESC_PER_BLOCK(sb).
+ * This function will be called when first group of meta_bg is added to bring
+ * new group descriptors block of new added meta_bg.
*/
static int add_new_gdb_meta_bg(struct super_block *sb,
handle_t *handle, ext4_group_t group) {
unsigned long gdb_num = group / EXT4_DESC_PER_BLOCK(sb);
int err;
- gdblock = ext4_meta_bg_first_block_no(sb, group) +
- ext4_bg_has_super(sb, group);
+ gdblock = ext4_group_first_block_no(sb, group) +
+ ext4_bg_has_super(sb, group);
gdb_bh = ext4_sb_bread(sb, gdblock, 0);
if (IS_ERR(gdb_bh))
return PTR_ERR(gdb_bh);
for (i = 0; i < reserved_gdb; i++) {
int err2;
data = (__le32 *)primary[i]->b_data;
- /* printk("reserving backup %lu[%u] = %lu\n",
- primary[i]->b_blocknr, gdbackups,
- blk + primary[i]->b_blocknr); */
data[gdbackups] = cpu_to_le32(blk + primary[i]->b_blocknr);
err2 = ext4_handle_dirty_metadata(handle, NULL, primary[i]);
if (!err)
ext4_group_first_block_no(sb, group));
BUFFER_TRACE(bh, "get_write_access");
if ((err = ext4_journal_get_write_access(handle, sb, bh,
- EXT4_JTR_NONE)))
+ EXT4_JTR_NONE))) {
+ brelse(bh);
break;
+ }
lock_buffer(bh);
memcpy(bh->b_data, data, size);
if (rest)
int gdb_num_end = ((group + flex_gd->count - 1) /
EXT4_DESC_PER_BLOCK(sb));
int meta_bg = ext4_has_feature_meta_bg(sb);
- sector_t old_gdb = 0;
+ sector_t padding_blocks = meta_bg ? 0 : sbi->s_sbh->b_blocknr -
+ ext4_group_first_block_no(sb, 0);
update_backups(sb, ext4_group_first_block_no(sb, 0),
(char *)es, sizeof(struct ext4_super_block), 0);
gdb_bh = sbi_array_rcu_deref(sbi, s_group_desc,
gdb_num);
- if (old_gdb == gdb_bh->b_blocknr)
- continue;
- update_backups(sb, gdb_bh->b_blocknr, gdb_bh->b_data,
- gdb_bh->b_size, meta_bg);
- old_gdb = gdb_bh->b_blocknr;
+ update_backups(sb, gdb_bh->b_blocknr - padding_blocks,
+ gdb_bh->b_data, gdb_bh->b_size, meta_bg);
}
}
exit:
errout:
ret = ext4_journal_stop(handle);
- if (!err)
- err = ret;
- return ret;
+ return err ? err : ret;
invalid_resize_inode:
ext4_error(sb, "corrupted/inconsistent resize inode");
*/
if (!sb_rdonly(sbi->s_sb) && journal) {
struct buffer_head *sbh = sbi->s_sbh;
- bool call_notify_err;
+ bool call_notify_err = false;
+
handle = jbd2_journal_start(journal, 1);
if (IS_ERR(handle))
goto write_directly;
struct ext4_mount_options old_opts;
ext4_group_t g;
int err = 0;
+ int alloc_ctx;
#ifdef CONFIG_QUOTA
int enable_quota = 0;
int i, j;
}
+ /*
+ * Changing the DIOREAD_NOLOCK or DELALLOC mount options may cause
+ * two calls to ext4_should_dioread_nolock() to return inconsistent
+ * values, triggering WARN_ON in ext4_add_complete_io(). we grab
+ * here s_writepages_rwsem to avoid race between writepages ops and
+ * remount.
+ */
+ alloc_ctx = ext4_writepages_down_write(sb);
ext4_apply_options(fc, sb);
+ ext4_writepages_up_write(sb, alloc_ctx);
if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^
test_opt(sb, JOURNAL_CHECKSUM)) {
if (sb_rdonly(sb) && !(old_sb_flags & SB_RDONLY) &&
sb_any_quota_suspended(sb))
dquot_resume(sb, -1);
+
+ alloc_ctx = ext4_writepages_down_write(sb);
sb->s_flags = old_sb_flags;
sbi->s_mount_opt = old_opts.s_mount_opt;
sbi->s_mount_opt2 = old_opts.s_mount_opt2;
sbi->s_commit_interval = old_opts.s_commit_interval;
sbi->s_min_batch_time = old_opts.s_min_batch_time;
sbi->s_max_batch_time = old_opts.s_max_batch_time;
+ ext4_writepages_up_write(sb, alloc_ctx);
+
if (!test_opt(sb, BLOCK_VALIDITY) && sbi->s_system_blks)
ext4_release_system_zone(sb);
#ifdef CONFIG_QUOTA
journal_superblock_t * sb;
struct recovery_info info;
+ errseq_t wb_err;
+ struct address_space *mapping;
memset(&info, 0, sizeof(info));
sb = journal->j_superblock;
return 0;
}
+ wb_err = 0;
+ mapping = journal->j_fs_dev->bd_inode->i_mapping;
+ errseq_check_and_advance(&mapping->wb_err, &wb_err);
err = do_one_pass(journal, &info, PASS_SCAN);
if (!err)
err = do_one_pass(journal, &info, PASS_REVOKE);
jbd2_journal_clear_revoke(journal);
err2 = sync_blockdev(journal->j_fs_dev);
+ if (!err)
+ err = err2;
+ err2 = errseq_check_and_advance(&mapping->wb_err, &wb_err);
if (!err)
err = err2;
/* Make sure all replayed data is on permanent storage */
success = err;
printk(KERN_ERR
"JBD2: IO error %d recovering "
- "block %ld in log\n",
+ "block %lu in log\n",
err, io_block);
} else {
unsigned long long blocknr;
printk(KERN_ERR "JBD2: Invalid "
"checksum recovering "
"data block %llu in "
- "log\n", blocknr);
+ "journal block %lu\n",
+ blocknr, io_block);
block_error = 1;
goto skip_write;
}
git.samba.org / sfrench / cifs-2.6.git / commitdiff