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| author | Yan, Zheng <zyan@redhat.com> | 2014-10-21 18:09:56 -0700 |
|---|---|---|
| committer | Ilya Dryomov <idryomov@redhat.com> | 2014-12-17 20:09:50 +0300 |
| commit | 70db4f3629b3476cf506be869ef9d15688d2d44a (patch) | |
| tree | 1a15d801442d91ec3ea98a84eedc03d61ee3127f /fs/ceph/inode.c | |
| parent | 4965fc38c460b274b2a1789e1165a25fb0409d7e (diff) | |
| download | linux-70db4f3629b3476cf506be869ef9d15688d2d44a.tar.gz linux-70db4f3629b3476cf506be869ef9d15688d2d44a.tar.bz2 linux-70db4f3629b3476cf506be869ef9d15688d2d44a.zip | |
ceph: introduce a new inode flag indicating if cached dentries are ordered
After creating/deleting/renaming file, offsets of sibling dentries may
change. So we can not use cached dentries to satisfy readdir. But we can
still use the cached dentries to conclude -ENOENT for lookup.
This patch introduces a new inode flag indicating if child dentries are
ordered. The flag is set at the same time marking a directory complete.
After creating/deleting/renaming file, we clear the flag on directory
inode. This prevents ceph_readdir() from using cached dentries to satisfy
readdir syscall.
Signed-off-by: Yan, Zheng <zyan@redhat.com>
Diffstat (limited to 'fs/ceph/inode.c')
| -rw-r--r-- | fs/ceph/inode.c | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c index 7b6139004401..72607c17e6fd 100644 --- a/fs/ceph/inode.c +++ b/fs/ceph/inode.c @@ -389,6 +389,7 @@ struct inode *ceph_alloc_inode(struct super_block *sb) ci->i_version = 0; ci->i_time_warp_seq = 0; ci->i_ceph_flags = 0; + ci->i_ordered_count = 0; atomic_set(&ci->i_release_count, 1); atomic_set(&ci->i_complete_count, 0); ci->i_symlink = NULL; @@ -845,7 +846,8 @@ static int fill_inode(struct inode *inode, (issued & CEPH_CAP_FILE_EXCL) == 0 && !__ceph_dir_is_complete(ci)) { dout(" marking %p complete (empty)\n", inode); - __ceph_dir_set_complete(ci, atomic_read(&ci->i_release_count)); + __ceph_dir_set_complete(ci, atomic_read(&ci->i_release_count), + ci->i_ordered_count); } /* were we issued a capability? */ @@ -1206,8 +1208,8 @@ retry_lookup: ceph_invalidate_dentry_lease(dn); /* d_move screws up sibling dentries' offsets */ - ceph_dir_clear_complete(dir); - ceph_dir_clear_complete(olddir); + ceph_dir_clear_ordered(dir); + ceph_dir_clear_ordered(olddir); dout("dn %p gets new offset %lld\n", req->r_old_dentry, ceph_dentry(req->r_old_dentry)->offset); @@ -1219,6 +1221,7 @@ retry_lookup: if (!rinfo->head->is_target) { dout("fill_trace null dentry\n"); if (dn->d_inode) { + ceph_dir_clear_ordered(dir); dout("d_delete %p\n", dn); d_delete(dn); } else { @@ -1235,7 +1238,7 @@ retry_lookup: /* attach proper inode */ if (!dn->d_inode) { - ceph_dir_clear_complete(dir); + ceph_dir_clear_ordered(dir); ihold(in); dn = splice_dentry(dn, in, &have_lease); if (IS_ERR(dn)) { @@ -1265,7 +1268,7 @@ retry_lookup: BUG_ON(!dir); BUG_ON(ceph_snap(dir) != CEPH_SNAPDIR); dout(" linking snapped dir %p to dn %p\n", in, dn); - ceph_dir_clear_complete(dir); + ceph_dir_clear_ordered(dir); ihold(in); dn = splice_dentry(dn, in, NULL); if (IS_ERR(dn)) { |