ceph_empty_snapc->num_snaps == 0 at all times. Passing such a snapc to
ceph_osdc_alloc_request() (possibly through ceph_osdc_new_request()) is
equivalent to passing NULL, as ceph_osdc_alloc_request() uses it only
for sizing the request message.
Further, in all four cases the subsequent ceph_osdc_build_request() is
passed NULL for snapc, meaning that 0 is encoded for seq and num_snaps
and making ceph_empty_snapc entirely useless. The two cases where it
actually mattered were removed in commits 860560904962 ("ceph: avoid
sending unnessesary FLUSHSNAP message") and 23078637e054 ("ceph: fix
queuing inode to mdsdir's snaprealm").
Signed-off-by: Ilya Dryomov <idryomov@xxxxxxxxx>
---
fs/ceph/addr.c | 13 +++++--------
fs/ceph/snap.c | 16 ----------------
fs/ceph/super.c | 8 +-------
fs/ceph/super.h | 3 ---
4 files changed, 6 insertions(+), 34 deletions(-)
diff --git a/fs/ceph/addr.c b/fs/ceph/addr.c
index aea449a4d038..32f57a1f1baf 100644
--- a/fs/ceph/addr.c
+++ b/fs/ceph/addr.c
@@ -1609,7 +1609,7 @@ int ceph_uninline_data(struct file *filp, struct page *locked_page)
ceph_vino(inode), 0, &len, 0, 1,
CEPH_OSD_OP_CREATE,
CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE,
- ceph_empty_snapc, 0, 0, false);
+ NULL, 0, 0, false);
if (IS_ERR(req)) {
err = PTR_ERR(req);
goto out;
@@ -1627,9 +1627,8 @@ int ceph_uninline_data(struct file *filp, struct page *locked_page)
ceph_vino(inode), 0, &len, 1, 3,
CEPH_OSD_OP_WRITE,
CEPH_OSD_FLAG_ONDISK | CEPH_OSD_FLAG_WRITE,
- ceph_empty_snapc,
- ci->i_truncate_seq, ci->i_truncate_size,
- false);
+ NULL, ci->i_truncate_seq,
+ ci->i_truncate_size, false);
if (IS_ERR(req)) {
err = PTR_ERR(req);
goto out;
@@ -1750,8 +1749,7 @@ static int __ceph_pool_perm_get(struct ceph_inode_info *ci, u32 pool)
goto out;
}
- rd_req = ceph_osdc_alloc_request(&fsc->client->osdc,
- ceph_empty_snapc,
+ rd_req = ceph_osdc_alloc_request(&fsc->client->osdc, NULL,
1, false, GFP_NOFS);
if (!rd_req) {
err = -ENOMEM;
@@ -1765,8 +1763,7 @@ static int __ceph_pool_perm_get(struct ceph_inode_info *ci, u32 pool)
"%llx.00000000", ci->i_vino.ino);
rd_req->r_base_oid.name_len = strlen(rd_req->r_base_oid.name);
- wr_req = ceph_osdc_alloc_request(&fsc->client->osdc,
- ceph_empty_snapc,
+ wr_req = ceph_osdc_alloc_request(&fsc->client->osdc, NULL,
1, false, GFP_NOFS);
if (!wr_req) {
err = -ENOMEM;
diff --git a/fs/ceph/snap.c b/fs/ceph/snap.c
index 4aa7122a8d38..9caaa7ffc93f 100644
--- a/fs/ceph/snap.c
+++ b/fs/ceph/snap.c
@@ -296,8 +296,6 @@ static int cmpu64_rev(const void *a, const void *b)
}
-struct ceph_snap_context *ceph_empty_snapc;
-
/*
* build the snap context for a given realm.
*/
@@ -987,17 +985,3 @@ void ceph_handle_snap(struct ceph_mds_client *mdsc,
up_write(&mdsc->snap_rwsem);
return;
}
-
-int __init ceph_snap_init(void)
-{
- ceph_empty_snapc = ceph_create_snap_context(0, GFP_NOFS);
- if (!ceph_empty_snapc)
- return -ENOMEM;
- ceph_empty_snapc->seq = 1;
- return 0;
-}
-
-void ceph_snap_exit(void)
-{
- ceph_put_snap_context(ceph_empty_snapc);
-}
diff --git a/fs/ceph/super.c b/fs/ceph/super.c
index e82acc6f3ac3..715282a92a07 100644
--- a/fs/ceph/super.c
+++ b/fs/ceph/super.c
@@ -1042,19 +1042,14 @@ static int __init init_ceph(void)
ceph_flock_init();
ceph_xattr_init();
- ret = ceph_snap_init();
- if (ret)
- goto out_xattr;
ret = register_filesystem(&ceph_fs_type);
if (ret)
- goto out_snap;
+ goto out_xattr;
pr_info("loaded (mds proto %d)\n", CEPH_MDSC_PROTOCOL);
return 0;
-out_snap:
- ceph_snap_exit();
out_xattr:
ceph_xattr_exit();
destroy_caches();
@@ -1066,7 +1061,6 @@ static void __exit exit_ceph(void)
{
dout("exit_ceph\n");
unregister_filesystem(&ceph_fs_type);
- ceph_snap_exit();
ceph_xattr_exit();
destroy_caches();
}
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index ff236d316aec..16f9edc5d1c7 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -719,7 +719,6 @@ static inline int default_congestion_kb(void)
/* snap.c */
-extern struct ceph_snap_context *ceph_empty_snapc;
struct ceph_snap_realm *ceph_lookup_snap_realm(struct ceph_mds_client *mdsc,
u64 ino);
extern void ceph_get_snap_realm(struct ceph_mds_client *mdsc,
@@ -736,8 +735,6 @@ extern void ceph_queue_cap_snap(struct ceph_inode_info *ci);
extern int __ceph_finish_cap_snap(struct ceph_inode_info *ci,
struct ceph_cap_snap *capsnap);
extern void ceph_cleanup_empty_realms(struct ceph_mds_client *mdsc);
-extern int ceph_snap_init(void);
-extern void ceph_snap_exit(void);
/*
* a cap_snap is "pending" if it is still awaiting an in-progress
--
2.4.3
--
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