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| author | Trond Myklebust <trondmy@gmail.com> | 2020-01-06 15:39:37 -0500 |
|---|---|---|
| committer | Anna Schumaker <Anna.Schumaker@Netapp.com> | 2020-01-15 10:54:33 -0500 |
| commit | c74dfe97c104bda5144bfa8193d8e5ea67d5da7f (patch) | |
| tree | 50a1d7f2e8791c3af949391359fb1279b1073244 /include/linux/nfs_fs_sb.h | |
| parent | 5c965db86e6b0e90a3112228820598e824920278 (diff) | |
| download | linux-c74dfe97c104bda5144bfa8193d8e5ea67d5da7f.tar.bz2 | |
NFS: Add mount option 'softreval'
Add a mount option 'softreval' that allows attribute revalidation 'getattr'
calls to time out, and causes them to fall back to using the cached
attributes.
The use case for this option is for ensuring that we can still (slowly)
traverse paths and use cached information even when the server is down.
Once the server comes back up again, the getattr calls start succeeding,
and the caches will revalidate as usual.
The 'softreval' mount option is automatically enabled if you have
specified 'softerr'. It can be turned off using the options
'nosoftreval', or 'hard'.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'include/linux/nfs_fs_sb.h')
| -rw-r--r-- | include/linux/nfs_fs_sb.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/linux/nfs_fs_sb.h b/include/linux/nfs_fs_sb.h index c176f705bf98..465fa98258a3 100644 --- a/include/linux/nfs_fs_sb.h +++ b/include/linux/nfs_fs_sb.h @@ -152,6 +152,7 @@ struct nfs_server { #define NFS_MOUNT_LOCAL_FLOCK 0x100000 #define NFS_MOUNT_LOCAL_FCNTL 0x200000 #define NFS_MOUNT_SOFTERR 0x400000 +#define NFS_MOUNT_SOFTREVAL 0x800000 unsigned int caps; /* server capabilities */ unsigned int rsize; /* read size */ |