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| author | J. Bruce Fields <bfields@redhat.com> | 2021-01-29 14:26:29 -0500 |
|---|---|---|
| committer | Chuck Lever <chuck.lever@oracle.com> | 2021-01-30 11:47:12 -0500 |
| commit | 3cc55f4434b421d37300aa9a167ace7d60b45ccf (patch) | |
| tree | 636aefebdee4ea18f32c2892d953120b38151694 /fs/nfsd | |
| parent | 02591f9febd5f69bb4c266a4abf899c4cf21964f (diff) | |
| download | linux-stable-3cc55f4434b421d37300aa9a167ace7d60b45ccf.tar.gz linux-stable-3cc55f4434b421d37300aa9a167ace7d60b45ccf.tar.bz2 linux-stable-3cc55f4434b421d37300aa9a167ace7d60b45ccf.zip | |
nfs: use change attribute for NFS re-exports
When exporting NFS, we may as well use the real change attribute
returned by the original server instead of faking up a change attribute
from the ctime.
Note we can't do that by setting I_VERSION--that would also turn on the
logic in iversion.h which treats the lower bit specially, and that
doesn't make sense for NFS.
So instead we define a new export operation for filesystems like NFS
that want to manage the change attribute themselves.
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Chuck Lever <chuck.lever@oracle.com>
Diffstat (limited to 'fs/nfsd')
| -rw-r--r-- | fs/nfsd/nfsfh.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/fs/nfsd/nfsfh.h b/fs/nfsd/nfsfh.h index cb20c2cd3469..f58933519f38 100644 --- a/fs/nfsd/nfsfh.h +++ b/fs/nfsd/nfsfh.h @@ -12,6 +12,7 @@ #include <linux/sunrpc/svc.h> #include <uapi/linux/nfsd/nfsfh.h> #include <linux/iversion.h> +#include <linux/exportfs.h> static inline __u32 ino_t_to_u32(ino_t ino) { @@ -264,7 +265,9 @@ fh_clear_wcc(struct svc_fh *fhp) static inline u64 nfsd4_change_attribute(struct kstat *stat, struct inode *inode) { - if (IS_I_VERSION(inode)) { + if (inode->i_sb->s_export_op->fetch_iversion) + return inode->i_sb->s_export_op->fetch_iversion(inode); + else if (IS_I_VERSION(inode)) { u64 chattr; chattr = stat->ctime.tv_sec; |