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| author | Yan, Zheng <zheng.z.yan@intel.com> | 2013-08-05 14:10:29 +0800 |
|---|---|---|
| committer | Sage Weil <sage@inktank.com> | 2013-08-15 11:12:11 -0700 |
| commit | 3871cbb9a41b1371dc13fc619e3ab4e0a1e29b4a (patch) | |
| tree | 527e72ea247c0bc632a28f021aa4b8149ecf78e8 /fs/ceph | |
| parent | b0d7c2231015b331b942746610a05b6ea72977ab (diff) | |
| download | linux-3871cbb9a41b1371dc13fc619e3ab4e0a1e29b4a.tar.bz2 | |
ceph: fix request max size
ceph_check_caps() requests new max size only when there is Fw cap.
If we call check_max_size() while there is no Fw cap. It updates
i_wanted_max_size and calls ceph_check_caps(), but ceph_check_caps()
does nothing. Later when Fw cap is issued, we call check_max_size()
again. But i_wanted_max_size is equal to 'endoff' at this time, so
check_max_size() doesn't call ceph_check_caps() and we end up with
waiting for the new max size forever.
The fix is duplicate ceph_check_caps()'s "request max size" code in
check_max_size(), and make try_get_cap_refs() wait for the Fw cap
before retry requesting new max size.
This patch also removes the "endoff > (inode->i_size << 1)" check
in check_max_size(). It's useless because there is no corresponding
logic in ceph_check_caps().
Reviewed-by: Sage Weil <sage@inktank.com>
Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com>
Diffstat (limited to 'fs/ceph')
| -rw-r--r-- | fs/ceph/caps.c | 18 |
1 files changed, 11 insertions, 7 deletions
diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c index 0e94d27fa284..165ebbeab1c3 100644 --- a/fs/ceph/caps.c +++ b/fs/ceph/caps.c @@ -2076,11 +2076,13 @@ static int try_get_cap_refs(struct ceph_inode_info *ci, int need, int want, spin_lock(&ci->i_ceph_lock); } - if (need & CEPH_CAP_FILE_WR) { + have = __ceph_caps_issued(ci, &implemented); + + if (have & need & CEPH_CAP_FILE_WR) { if (endoff >= 0 && endoff > (loff_t)ci->i_max_size) { dout("get_cap_refs %p endoff %llu > maxsize %llu\n", inode, endoff, ci->i_max_size); - if (endoff > ci->i_wanted_max_size) { + if (endoff > ci->i_requested_max_size) { *check_max = 1; ret = 1; } @@ -2095,7 +2097,6 @@ static int try_get_cap_refs(struct ceph_inode_info *ci, int need, int want, goto out; } } - have = __ceph_caps_issued(ci, &implemented); if ((have & need) == need) { /* @@ -2137,14 +2138,17 @@ static void check_max_size(struct inode *inode, loff_t endoff) /* do we need to explicitly request a larger max_size? */ spin_lock(&ci->i_ceph_lock); - if ((endoff >= ci->i_max_size || - endoff > (inode->i_size << 1)) && - endoff > ci->i_wanted_max_size) { + if (endoff >= ci->i_max_size && endoff > ci->i_wanted_max_size) { dout("write %p at large endoff %llu, req max_size\n", inode, endoff); ci->i_wanted_max_size = endoff; - check = 1; } + /* duplicate ceph_check_caps()'s logic */ + if (ci->i_auth_cap && + (ci->i_auth_cap->issued & CEPH_CAP_FILE_WR) && + ci->i_wanted_max_size > ci->i_max_size && + ci->i_wanted_max_size > ci->i_requested_max_size) + check = 1; spin_unlock(&ci->i_ceph_lock); if (check) ceph_check_caps(ci, CHECK_CAPS_AUTHONLY, NULL); |