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author | Anna Schumaker <Anna.Schumaker@netapp.com> | 2015-04-03 14:35:59 -0400 |
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committer | Trond Myklebust <trond.myklebust@primarydata.com> | 2015-04-23 14:43:54 -0400 |
commit | ea96d1ecbe4fcb1df487d99309d3157b4ff5fc02 (patch) | |
tree | fa64fa3c6b724b3423e13328a1be5b9bdec784fc /fs/nfs/direct.c | |
parent | 3f9400981691f6845e5c22b962500742b80a5484 (diff) | |
download | linux-stable-ea96d1ecbe4fcb1df487d99309d3157b4ff5fc02.tar.gz linux-stable-ea96d1ecbe4fcb1df487d99309d3157b4ff5fc02.tar.bz2 linux-stable-ea96d1ecbe4fcb1df487d99309d3157b4ff5fc02.zip |
nfs: Fetch MOUNTED_ON_FILEID when updating an inode
2ef47eb1 (NFS: Fix use of nfs_attr_use_mounted_on_fileid()) was a good
start to fixing a circular directory structure warning for NFS v4
"junctioned" mountpoints. Unfortunately, further testing continued to
generate this error.
My server is configured like this:
anna@nfsd ~ % df
Filesystem Size Used Avail Use% Mounted on
/dev/vda1 9.1G 2.0G 6.5G 24% /
/dev/vdc1 1014M 33M 982M 4% /exports
/dev/vdc2 1014M 33M 982M 4% /exports/vol1
/dev/vdc3 1014M 33M 982M 4% /exports/vol1/vol2
anna@nfsd ~ % cat /etc/exports
/exports/ *(rw,async,no_subtree_check,no_root_squash)
/exports/vol1/ *(rw,async,no_subtree_check,no_root_squash)
/exports/vol1/vol2 *(rw,async,no_subtree_check,no_root_squash)
I've been running chown across the entire mountpoint twice in a row to
hit this problem. The first run succeeds, but the second one fails with
the circular directory warning along with:
anna@client ~ % dmesg
[Apr 3 14:28] NFS: server 192.168.100.204 error: fileid changed
fsid 0:39: expected fileid 0x100080, got 0x80
WHere 0x80 is the mountpoint's fileid and 0x100080 is the mounted-on
fileid.
This patch fixes the issue by requesting an updated mounted-on fileid
from the server during nfs_update_inode(), and then checking that the
fileid stored in the nfs_inode matches either the fileid or mounted-on
fileid returned by the server.
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
Diffstat (limited to 'fs/nfs/direct.c')
0 files changed, 0 insertions, 0 deletions