diff options
author | Xiubo Li <xiubli@redhat.com> | 2023-11-07 10:44:41 +0800 |
---|---|---|
committer | Ilya Dryomov <idryomov@gmail.com> | 2024-01-15 15:40:50 +0100 |
commit | aaefabc4a5f7ae48682c4d2d5d10faaf95c08eb9 (patch) | |
tree | 68fb900421a3f1eb962988abc7a13b621cacac69 /fs/ceph/super.h | |
parent | b79e4a0aa902322756ced7361a2c637d462c3c1c (diff) |
ceph: try to allocate a smaller extent map for sparse read
In fscrypt case and for a smaller read length we can predict the
max count of the extent map. And for small read length use cases
this could save some memories.
[ idryomov: squash into a single patch to avoid build break, drop
redundant variable in ceph_alloc_sparse_ext_map() ]
Signed-off-by: Xiubo Li <xiubli@redhat.com>
Reviewed-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
Diffstat (limited to 'fs/ceph/super.h')
-rw-r--r-- | fs/ceph/super.h | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/fs/ceph/super.h b/fs/ceph/super.h index fe0f64a0acb2..b06e2bc86221 100644 --- a/fs/ceph/super.h +++ b/fs/ceph/super.h @@ -3,6 +3,7 @@ #define _FS_CEPH_SUPER_H #include <linux/ceph/ceph_debug.h> +#include <linux/ceph/osd_client.h> #include <asm/unaligned.h> #include <linux/backing-dev.h> @@ -1407,6 +1408,19 @@ static inline void __ceph_update_quota(struct ceph_inode_info *ci, ceph_adjust_quota_realms_count(&ci->netfs.inode, has_quota); } +static inline int __ceph_sparse_read_ext_count(struct inode *inode, u64 len) +{ + int cnt = 0; + + if (IS_ENCRYPTED(inode)) { + cnt = len >> CEPH_FSCRYPT_BLOCK_SHIFT; + if (cnt > CEPH_SPARSE_EXT_ARRAY_INITIAL) + cnt = 0; + } + + return cnt; +} + extern void ceph_handle_quota(struct ceph_mds_client *mdsc, struct ceph_mds_session *session, struct ceph_msg *msg); |