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-rw-r--r--fs/exfat/file.c107
1 files changed, 37 insertions, 70 deletions
diff --git a/fs/exfat/file.c b/fs/exfat/file.c
index 6af0191b648f..4e0793f35e8f 100644
--- a/fs/exfat/file.c
+++ b/fs/exfat/file.c
@@ -101,7 +101,6 @@ int __exfat_truncate(struct inode *inode, loff_t new_size)
struct super_block *sb = inode->i_sb;
struct exfat_sb_info *sbi = EXFAT_SB(sb);
struct exfat_inode_info *ei = EXFAT_I(inode);
- int evict = (ei->dir.dir == DIR_DELETED) ? 1 : 0;
/* check if the given file ID is opened */
if (ei->type != TYPE_FILE && ei->type != TYPE_DIR)
@@ -110,8 +109,7 @@ int __exfat_truncate(struct inode *inode, loff_t new_size)
exfat_set_volume_dirty(sb);
num_clusters_new = EXFAT_B_TO_CLU_ROUND_UP(i_size_read(inode), sbi);
- num_clusters_phys =
- EXFAT_B_TO_CLU_ROUND_UP(EXFAT_I(inode)->i_size_ondisk, sbi);
+ num_clusters_phys = EXFAT_B_TO_CLU_ROUND_UP(ei->i_size_ondisk, sbi);
exfat_chain_set(&clu, ei->start_clu, num_clusters_phys, ei->flags);
@@ -150,50 +148,19 @@ int __exfat_truncate(struct inode *inode, loff_t new_size)
if (ei->type == TYPE_FILE)
ei->attr |= ATTR_ARCHIVE;
- /* update the directory entry */
- if (!evict) {
- struct timespec64 ts;
- struct exfat_dentry *ep, *ep2;
- struct exfat_entry_set_cache *es;
- int err;
-
- es = exfat_get_dentry_set(sb, &(ei->dir), ei->entry,
- ES_ALL_ENTRIES);
- if (!es)
- return -EIO;
- ep = exfat_get_dentry_cached(es, 0);
- ep2 = exfat_get_dentry_cached(es, 1);
-
- ts = current_time(inode);
- exfat_set_entry_time(sbi, &ts,
- &ep->dentry.file.modify_tz,
- &ep->dentry.file.modify_time,
- &ep->dentry.file.modify_date,
- &ep->dentry.file.modify_time_cs);
- ep->dentry.file.attr = cpu_to_le16(ei->attr);
-
- /* File size should be zero if there is no cluster allocated */
- if (ei->start_clu == EXFAT_EOF_CLUSTER) {
- ep2->dentry.stream.valid_size = 0;
- ep2->dentry.stream.size = 0;
- } else {
- ep2->dentry.stream.valid_size = cpu_to_le64(new_size);
- ep2->dentry.stream.size = ep2->dentry.stream.valid_size;
- }
-
- if (new_size == 0) {
- /* Any directory can not be truncated to zero */
- WARN_ON(ei->type != TYPE_FILE);
-
- ep2->dentry.stream.flags = ALLOC_FAT_CHAIN;
- ep2->dentry.stream.start_clu = EXFAT_FREE_CLUSTER;
- }
-
- exfat_update_dir_chksum_with_entry_set(es);
- err = exfat_free_dentry_set(es, inode_needs_sync(inode));
- if (err)
- return err;
- }
+ /*
+ * update the directory entry
+ *
+ * If the directory entry is updated by mark_inode_dirty(), the
+ * directory entry will be written after a writeback cycle of
+ * updating the bitmap/FAT, which may result in clusters being
+ * freed but referenced by the directory entry in the event of a
+ * sudden power failure.
+ * __exfat_write_inode() is called for directory entry, bitmap
+ * and FAT to be written in a same writeback.
+ */
+ if (__exfat_write_inode(inode, inode_needs_sync(inode)))
+ return -EIO;
/* cut off from the FAT chain */
if (ei->flags == ALLOC_FAT_CHAIN && last_clu != EXFAT_FREE_CLUSTER &&
@@ -219,8 +186,6 @@ int __exfat_truncate(struct inode *inode, loff_t new_size)
if (exfat_free_cluster(inode, &clu))
return -EIO;
- exfat_clear_volume_dirty(sb);
-
return 0;
}
@@ -228,12 +193,13 @@ void exfat_truncate(struct inode *inode, loff_t size)
{
struct super_block *sb = inode->i_sb;
struct exfat_sb_info *sbi = EXFAT_SB(sb);
+ struct exfat_inode_info *ei = EXFAT_I(inode);
unsigned int blocksize = i_blocksize(inode);
loff_t aligned_size;
int err;
mutex_lock(&sbi->s_lock);
- if (EXFAT_I(inode)->start_clu == 0) {
+ if (ei->start_clu == 0) {
/*
* Empty start_clu != ~0 (not allocated)
*/
@@ -245,14 +211,8 @@ void exfat_truncate(struct inode *inode, loff_t size)
if (err)
goto write_size;
- inode->i_ctime = inode->i_mtime = current_time(inode);
- if (IS_DIRSYNC(inode))
- exfat_sync_inode(inode);
- else
- mark_inode_dirty(inode);
-
- inode->i_blocks = ((i_size_read(inode) + (sbi->cluster_size - 1)) &
- ~(sbi->cluster_size - 1)) >> inode->i_blkbits;
+ inode->i_blocks = round_up(i_size_read(inode), sbi->cluster_size) >>
+ inode->i_blkbits;
write_size:
aligned_size = i_size_read(inode);
if (aligned_size & (blocksize - 1)) {
@@ -260,11 +220,11 @@ write_size:
aligned_size++;
}
- if (EXFAT_I(inode)->i_size_ondisk > i_size_read(inode))
- EXFAT_I(inode)->i_size_ondisk = aligned_size;
+ if (ei->i_size_ondisk > i_size_read(inode))
+ ei->i_size_ondisk = aligned_size;
- if (EXFAT_I(inode)->i_size_aligned > i_size_read(inode))
- EXFAT_I(inode)->i_size_aligned = aligned_size;
+ if (ei->i_size_aligned > i_size_read(inode))
+ ei->i_size_aligned = aligned_size;
mutex_unlock(&sbi->s_lock);
}
@@ -332,6 +292,12 @@ int exfat_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
attr->ia_valid &= ~ATTR_MODE;
}
+ if (attr->ia_valid & ATTR_SIZE)
+ inode->i_mtime = inode->i_ctime = current_time(inode);
+
+ setattr_copy(&init_user_ns, inode, attr);
+ exfat_truncate_atime(&inode->i_atime);
+
if (attr->ia_valid & ATTR_SIZE) {
error = exfat_block_truncate_page(inode, attr->ia_size);
if (error)
@@ -339,13 +305,15 @@ int exfat_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
down_write(&EXFAT_I(inode)->truncate_lock);
truncate_setsize(inode, attr->ia_size);
+
+ /*
+ * __exfat_write_inode() is called from exfat_truncate(), inode
+ * is already written by it, so mark_inode_dirty() is unneeded.
+ */
exfat_truncate(inode, attr->ia_size);
up_write(&EXFAT_I(inode)->truncate_lock);
- }
-
- setattr_copy(&init_user_ns, inode, attr);
- exfat_truncate_atime(&inode->i_atime);
- mark_inode_dirty(inode);
+ } else
+ mark_inode_dirty(inode);
out:
return error;
@@ -353,21 +321,20 @@ out:
static int exfat_ioctl_fitrim(struct inode *inode, unsigned long arg)
{
- struct request_queue *q = bdev_get_queue(inode->i_sb->s_bdev);
struct fstrim_range range;
int ret = 0;
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- if (!blk_queue_discard(q))
+ if (!bdev_max_discard_sectors(inode->i_sb->s_bdev))
return -EOPNOTSUPP;
if (copy_from_user(&range, (struct fstrim_range __user *)arg, sizeof(range)))
return -EFAULT;
range.minlen = max_t(unsigned int, range.minlen,
- q->limits.discard_granularity);
+ bdev_discard_granularity(inode->i_sb->s_bdev));
ret = exfat_trim_fs(inode, &range);
if (ret < 0)
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.