On 4/7/22 10:15 PM, Gao Xiang wrote:
> On Wed, Apr 06, 2022 at 03:56:07PM +0800, Jeffle Xu wrote:
>> Similar to the multi device mode, erofs could be mounted from one
>> primary data blob (mandatory) and multiple extra data blobs (optional).
>>
>> Register fscache context for each extra data blob.
>>
>> Signed-off-by: Jeffle Xu <jefflexu@xxxxxxxxxxxxxxxxx>
>> ---
>> fs/erofs/data.c | 3 +++
>> fs/erofs/internal.h | 2 ++
>> fs/erofs/super.c | 25 +++++++++++++++++--------
>> 3 files changed, 22 insertions(+), 8 deletions(-)
>>
>> diff --git a/fs/erofs/data.c b/fs/erofs/data.c
>> index bc22642358ec..14b64d960541 100644
>> --- a/fs/erofs/data.c
>> +++ b/fs/erofs/data.c
>> @@ -199,6 +199,7 @@ int erofs_map_dev(struct super_block *sb, struct erofs_map_dev *map)
>> map->m_bdev = sb->s_bdev;
>> map->m_daxdev = EROFS_SB(sb)->dax_dev;
>> map->m_dax_part_off = EROFS_SB(sb)->dax_part_off;
>> + map->m_fscache = EROFS_SB(sb)->s_fscache;
>>
>> if (map->m_deviceid) {
>> down_read(&devs->rwsem);
>> @@ -210,6 +211,7 @@ int erofs_map_dev(struct super_block *sb, struct erofs_map_dev *map)
>> map->m_bdev = dif->bdev;
>> map->m_daxdev = dif->dax_dev;
>> map->m_dax_part_off = dif->dax_part_off;
>> + map->m_fscache = dif->fscache;
>> up_read(&devs->rwsem);
>> } else if (devs->extra_devices) {
>> down_read(&devs->rwsem);
>> @@ -227,6 +229,7 @@ int erofs_map_dev(struct super_block *sb, struct erofs_map_dev *map)
>> map->m_bdev = dif->bdev;
>> map->m_daxdev = dif->dax_dev;
>> map->m_dax_part_off = dif->dax_part_off;
>> + map->m_fscache = dif->fscache;
>> break;
>> }
>> }
>> diff --git a/fs/erofs/internal.h b/fs/erofs/internal.h
>> index eb37b33bce37..90f7d6286a4f 100644
>> --- a/fs/erofs/internal.h
>> +++ b/fs/erofs/internal.h
>> @@ -49,6 +49,7 @@ typedef u32 erofs_blk_t;
>>
>> struct erofs_device_info {
>> char *path;
>> + struct erofs_fscache *fscache;
>> struct block_device *bdev;
>> struct dax_device *dax_dev;
>> u64 dax_part_off;
>> @@ -482,6 +483,7 @@ static inline int z_erofs_map_blocks_iter(struct inode *inode,
>> #endif /* !CONFIG_EROFS_FS_ZIP */
>>
>> struct erofs_map_dev {
>> + struct erofs_fscache *m_fscache;
>> struct block_device *m_bdev;
>> struct dax_device *m_daxdev;
>> u64 m_dax_part_off;
>> diff --git a/fs/erofs/super.c b/fs/erofs/super.c
>> index 9498b899b73b..8c7181cd37e6 100644
>> --- a/fs/erofs/super.c
>> +++ b/fs/erofs/super.c
>> @@ -259,15 +259,23 @@ static int erofs_init_devices(struct super_block *sb,
>> }
>> dis = ptr + erofs_blkoff(pos);
>>
>> - bdev = blkdev_get_by_path(dif->path,
>> - FMODE_READ | FMODE_EXCL,
>> - sb->s_type);
>> - if (IS_ERR(bdev)) {
>> - err = PTR_ERR(bdev);
>> - break;
>> + if (erofs_is_fscache_mode(sb)) {
>> + err = erofs_fscache_register_cookie(sb, &dif->fscache,
>> + dif->path, false);
>> + if (err)
>> + break;
>> + } else {
>> + bdev = blkdev_get_by_path(dif->path,
>> + FMODE_READ | FMODE_EXCL,
>> + sb->s_type);
>> + if (IS_ERR(bdev)) {
>> + err = PTR_ERR(bdev);
>> + break;
>> + }
>> + dif->bdev = bdev;
>> + dif->dax_dev = fs_dax_get_by_bdev(bdev, &dif->dax_part_off);
>
> Overly long line, please help split into 2 lines if possible.
>
Will be fixed in the next version.
--
Thanks,
Jeffle
