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authorDavid Howells <dhowells@redhat.com>2017-11-02 15:27:50 +0000
committerDavid Howells <dhowells@redhat.com>2017-11-13 15:38:18 +0000
commit989782dcdc91a5e6d5999c7a52a84a60a0811e56 (patch)
tree138ed46554536280e0d4d1834a16c28740e8cdae /fs/afs/xattr.c
parentbe080a6f43c40976afc950ee55e9b7f8e2b53525 (diff)
afs: Overhaul cell database management
Overhaul the way that the in-kernel AFS client keeps track of cells in the following manner: (1) Cells are now held in an rbtree to make walking them quicker and RCU managed (though this is probably overkill). (2) Cells now have a manager work item that: (A) Looks after fetching and refreshing the VL server list. (B) Manages cell record lifetime, including initialising and destruction. (B) Manages cell record caching whereby threads are kept around for a certain time after last use and then destroyed. (C) Manages the FS-Cache index cookie for a cell. It is not permitted for a cookie to be in use twice, so we have to be careful to not allow a new cell record to exist at the same time as an old record of the same name. (3) Each AFS network namespace is given a manager work item that manages the cells within it, maintaining a single timer to prod cells into updating their DNS records. This uses the reduce_timer() facility to make the timer expire at the soonest timed event that needs happening. (4) When a module is being unloaded, cells and cell managers are now counted out using dec_after_work() to make sure the module text is pinned until after the data structures have been cleaned up. (5) Each cell's VL server list is now protected by a seqlock rather than a semaphore. Signed-off-by: David Howells <dhowells@redhat.com>
Diffstat (limited to 'fs/afs/xattr.c')
-rw-r--r--fs/afs/xattr.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/fs/afs/xattr.c b/fs/afs/xattr.c
index 2830e4f48d85..e58e00ee9747 100644
--- a/fs/afs/xattr.c
+++ b/fs/afs/xattr.c
@@ -45,7 +45,7 @@ static int afs_xattr_get_cell(const struct xattr_handler *handler,
struct afs_cell *cell = vnode->volume->cell;
size_t namelen;
- namelen = strlen(cell->name);
+ namelen = cell->name_len;
if (size == 0)
return namelen;
if (namelen > size)