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authorYan, Zheng <zheng.z.yan@intel.com>2014-04-06 14:10:04 +0800
committerSage Weil <sage@inktank.com>2014-04-06 09:13:14 -0700
commita30be7cb2ccb995ad5e67fd4b548f11fe37fc8b1 (patch)
tree5f0927538f5e54ea9b6be1ec95e571d569975ca0 /fs/ceph
parent8a53f23fcda355958a79774c6333a3a31c380ecf (diff)
downloadop-kernel-dev-a30be7cb2ccb995ad5e67fd4b548f11fe37fc8b1.zip
op-kernel-dev-a30be7cb2ccb995ad5e67fd4b548f11fe37fc8b1.tar.gz
ceph: skip invalid dentry during dcache readdir
skip dentries that were added before MDS issued FILE_SHARED to client. Signed-off-by: Yan, Zheng <zheng.z.yan@intel.com> Reviewed-by: Sage Weil <sage@inktank.com>
Diffstat (limited to 'fs/ceph')
-rw-r--r--fs/ceph/dir.c13
1 files changed, 8 insertions, 5 deletions
diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index 46cd092..766410a 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -119,7 +119,8 @@ static int fpos_cmp(loff_t l, loff_t r)
* defined IFF we hold CEPH_CAP_FILE_SHARED (which will be revoked by
* the MDS if/when the directory is modified).
*/
-static int __dcache_readdir(struct file *file, struct dir_context *ctx)
+static int __dcache_readdir(struct file *file, struct dir_context *ctx,
+ u32 shared_gen)
{
struct ceph_file_info *fi = file->private_data;
struct dentry *parent = file->f_dentry;
@@ -133,8 +134,8 @@ static int __dcache_readdir(struct file *file, struct dir_context *ctx)
last = fi->dentry;
fi->dentry = NULL;
- dout("__dcache_readdir %p at %llu (last %p)\n", dir, ctx->pos,
- last);
+ dout("__dcache_readdir %p v%u at %llu (last %p)\n",
+ dir, shared_gen, ctx->pos, last);
spin_lock(&parent->d_lock);
@@ -161,7 +162,8 @@ more:
goto out_unlock;
}
spin_lock_nested(&dentry->d_lock, DENTRY_D_LOCK_NESTED);
- if (!d_unhashed(dentry) && dentry->d_inode &&
+ if (di->lease_shared_gen == shared_gen &&
+ !d_unhashed(dentry) && dentry->d_inode &&
ceph_snap(dentry->d_inode) != CEPH_SNAPDIR &&
ceph_ino(dentry->d_inode) != CEPH_INO_CEPH &&
fpos_cmp(ctx->pos, di->offset) <= 0)
@@ -289,8 +291,9 @@ static int ceph_readdir(struct file *file, struct dir_context *ctx)
ceph_snap(inode) != CEPH_SNAPDIR &&
__ceph_dir_is_complete(ci) &&
__ceph_caps_issued_mask(ci, CEPH_CAP_FILE_SHARED, 1)) {
+ u32 shared_gen = ci->i_shared_gen;
spin_unlock(&ci->i_ceph_lock);
- err = __dcache_readdir(file, ctx);
+ err = __dcache_readdir(file, ctx, shared_gen);
if (err != -EAGAIN)
return err;
} else {
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