aboutsummaryrefslogtreecommitdiffstats
diff options
context:
space:
mode:
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
parentcbe8260369c9f88eafa035cd327dc3e02fad528c (diff)
downloadlinux-yocto-4.8-8a1636c459cb7a4b32ba4024cd1b2ba21fba6aed.tar.gz
linux-yocto-4.8-8a1636c459cb7a4b32ba4024cd1b2ba21fba6aed.tar.bz2
linux-yocto-4.8-8a1636c459cb7a4b32ba4024cd1b2ba21fba6aed.zip
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>
-rw-r--r--fs/nfs/nfs4proc.c3
-rw-r--r--fs/nfs/objlayout/objio_osd.c1
-rw-r--r--fs/nfs/pnfs.h22
3 files changed, 26 insertions, 0 deletions
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 5b4124e4c22f..57340096c737 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -2361,6 +2361,9 @@ nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
struct nfs4_state *state = NULL;
int status;
+ if (pnfs_ld_layoutret_on_setattr(inode))
+ pnfs_return_layout(inode);
+
nfs_fattr_init(fattr);
/* Search for an existing open(O_WRITE) file */
diff --git a/fs/nfs/objlayout/objio_osd.c b/fs/nfs/objlayout/objio_osd.c
index cc92d3b3dc3a..4e8de3ec9a63 100644
--- a/fs/nfs/objlayout/objio_osd.c
+++ b/fs/nfs/objlayout/objio_osd.c
@@ -964,6 +964,7 @@ objlayout_pg_test(struct nfs_pageio_descriptor *pgio, struct nfs_page *prev,
static struct pnfs_layoutdriver_type objlayout_type = {
.id = LAYOUT_OSD2_OBJECTS,
.name = "LAYOUT_OSD2_OBJECTS",
+ .flags = PNFS_LAYOUTRET_ON_SETATTR,
.alloc_layout_hdr = objlayout_alloc_layout_hdr,
.free_layout_hdr = objlayout_free_layout_hdr,
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;