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| author | Sage Weil <sage@newdream.net> | 2010-06-10 14:21:36 -0700 |
|---|---|---|
| committer | Sage Weil <sage@newdream.net> | 2010-08-01 20:11:39 -0700 |
| commit | ca81f3f6bd759f90a4b940cddda1f8bc61a7725a (patch) | |
| tree | 77b0f3a45d48303246f26e85b3945916f388805a | |
| parent | 3b454c4945c756686e91d77eeefac80cb5d21baf (diff) | |
| download | linux-ca81f3f6bd759f90a4b940cddda1f8bc61a7725a.tar.gz linux-ca81f3f6bd759f90a4b940cddda1f8bc61a7725a.tar.bz2 linux-ca81f3f6bd759f90a4b940cddda1f8bc61a7725a.zip | |
ceph: skip if no auth cap in flush_snaps
If we have a capsnap but no auth cap (e.g. because it is migrating to
another mds), bail out and do nothing for now. Do NOT remove the capsnap
from the flush list.
Signed-off-by: Sage Weil <sage@newdream.net>
| -rw-r--r-- | fs/ceph/caps.c | 19 |
1 files changed, 12 insertions, 7 deletions
diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c index 82ffde618af0..dbf0d6a02a77 100644 --- a/fs/ceph/caps.c +++ b/fs/ceph/caps.c @@ -339,7 +339,7 @@ static struct ceph_cap *__get_cap_for_mds(struct ceph_inode_info *ci, int mds) /* * Return id of any MDS with a cap, preferably FILE_WR|BUFFER|EXCL, else -1. */ -static int __ceph_get_cap_mds(struct ceph_inode_info *ci, u32 *mseq) +static int __ceph_get_cap_mds(struct ceph_inode_info *ci) { struct ceph_cap *cap; int mds = -1; @@ -349,8 +349,6 @@ static int __ceph_get_cap_mds(struct ceph_inode_info *ci, u32 *mseq) for (p = rb_first(&ci->i_caps); p; p = rb_next(p)) { cap = rb_entry(p, struct ceph_cap, ci_node); mds = cap->mds; - if (mseq) - *mseq = cap->mseq; if (cap->issued & (CEPH_CAP_FILE_WR | CEPH_CAP_FILE_BUFFER | CEPH_CAP_FILE_EXCL)) @@ -363,7 +361,7 @@ int ceph_get_cap_mds(struct inode *inode) { int mds; spin_lock(&inode->i_lock); - mds = __ceph_get_cap_mds(ceph_inode(inode), NULL); + mds = __ceph_get_cap_mds(ceph_inode(inode)); spin_unlock(&inode->i_lock); return mds; } @@ -1231,7 +1229,13 @@ retry: BUG_ON(capsnap->dirty == 0); /* pick mds, take s_mutex */ - mds = __ceph_get_cap_mds(ci, &mseq); + if (ci->i_auth_cap == NULL) { + dout("no auth cap (migrating?), doing nothing\n"); + goto out; + } + mds = ci->i_auth_cap->session->s_mds; + mseq = ci->i_auth_cap->mseq; + if (session && session->s_mds != mds) { dout("oops, wrong session %p mutex\n", session); mutex_unlock(&session->s_mutex); @@ -1250,8 +1254,8 @@ retry: } /* * if session == NULL, we raced against a cap - * deletion. retry, and we'll get a better - * @mds value next time. + * deletion or migration. retry, and we'll + * get a better @mds value next time. */ spin_lock(&inode->i_lock); goto retry; @@ -1289,6 +1293,7 @@ retry: list_del_init(&ci->i_snap_flush_item); spin_unlock(&mdsc->snap_flush_lock); +out: if (psession) *psession = session; else if (session) { |