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authorBenny Halevy <bhalevy@panasas.com>2010-07-14 15:43:57 -0400
committerBoaz Harrosh <bharrosh@panasas.com>2011-05-29 20:54:36 +0300
commit8a1636c459cb7a4b32ba4024cd1b2ba21fba6aed (patch)
treef9c46f272b98ceb65f997f226d47da68c6fcac6b /fs/nfs/pnfs.h
parentcbe8260369c9f88eafa035cd327dc3e02fad528c (diff)
downloadlinux-stericsson-8a1636c459cb7a4b32ba4024cd1b2ba21fba6aed.tar.gz
pnfs: layoutret_on_setattr
With the objects layout security model, we have object capabilities that are associated with the layout and we anticipate that the server will issue a cb_layoutrecall for any setattr that changes security related attributes (user/group/mode/acl) or truncates the file. Therefore, the layout is returned before issuing the setattr to avoid the anticipated cb_layoutrecall. Signed-off-by: Benny Halevy <bhalevy@panasas.com>
Diffstat (limited to 'fs/nfs/pnfs.h')
-rw-r--r--fs/nfs/pnfs.h22
1 files changed, 22 insertions, 0 deletions
diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
index c34f7a0e3bc2..af3967a893a1 100644
--- a/fs/nfs/pnfs.h
+++ b/fs/nfs/pnfs.h
@@ -65,6 +65,11 @@ enum {
NFS_LAYOUT_DESTROYED, /* no new use of layout allowed */
};
+enum layoutdriver_policy_flags {
+ /* Should the pNFS client commit and return the layout upon a setattr */
+ PNFS_LAYOUTRET_ON_SETATTR = 1 << 0,
+};
+
struct nfs4_deviceid_node;
/* Per-layout driver specific registration structure */
@@ -73,6 +78,7 @@ struct pnfs_layoutdriver_type {
const u32 id;
const char *name;
struct module *owner;
+ unsigned flags;
struct pnfs_layout_hdr * (*alloc_layout_hdr) (struct inode *inode, gfp_t gfp_flags);
void (*free_layout_hdr) (struct pnfs_layout_hdr *);
@@ -258,6 +264,16 @@ static inline void pnfs_clear_request_commit(struct nfs_page *req)
put_lseg(req->wb_commit_lseg);
}
+/* Should the pNFS client commit and return the layout upon a setattr */
+static inline bool
+pnfs_ld_layoutret_on_setattr(struct inode *inode)
+{
+ if (!pnfs_enabled_sb(NFS_SERVER(inode)))
+ return false;
+ return NFS_SERVER(inode)->pnfs_curr_ld->flags &
+ PNFS_LAYOUTRET_ON_SETATTR;
+}
+
static inline int pnfs_return_layout(struct inode *ino)
{
struct nfs_inode *nfsi = NFS_I(ino);
@@ -317,6 +333,12 @@ static inline int pnfs_return_layout(struct inode *ino)
}
static inline bool
+pnfs_ld_layoutret_on_setattr(struct inode *inode)
+{
+ return false;
+}
+
+static inline bool
pnfs_roc(struct inode *ino)
{
return false;