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-rw-r--r--fs/nfsd/nfs4recover.c169
-rw-r--r--fs/nfsd/nfs4state.c16
-rw-r--r--include/linux/nfsd/state.h5
3 files changed, 190 insertions, 0 deletions
diff --git a/fs/nfsd/nfs4recover.c b/fs/nfsd/nfs4recover.c
index 2dc9851a1d37..2805c5245eac 100644
--- a/fs/nfsd/nfs4recover.c
+++ b/fs/nfsd/nfs4recover.c
@@ -120,6 +120,70 @@ out:
return status;
}
+static int
+nfsd4_rec_fsync(struct dentry *dentry)
+{
+ struct file *filp;
+ int status = nfs_ok;
+
+ dprintk("NFSD: nfs4_fsync_rec_dir\n");
+ filp = dentry_open(dget(dentry), mntget(rec_dir.mnt), O_RDWR);
+ if (IS_ERR(filp)) {
+ status = PTR_ERR(filp);
+ goto out;
+ }
+ if (filp->f_op && filp->f_op->fsync)
+ status = filp->f_op->fsync(filp, filp->f_dentry, 0);
+ fput(filp);
+out:
+ if (status)
+ printk("nfsd4: unable to sync recovery directory\n");
+ return status;
+}
+
+int
+nfsd4_create_clid_dir(struct nfs4_client *clp)
+{
+ char *dname = clp->cl_recdir;
+ struct dentry *dentry;
+ uid_t uid;
+ gid_t gid;
+ int status;
+
+ dprintk("NFSD: nfsd4_create_clid_dir for \"%s\"\n", dname);
+
+ if (!rec_dir_init || clp->cl_firststate)
+ return 0;
+
+ nfs4_save_user(&uid, &gid);
+
+ /* lock the parent */
+ down(&rec_dir.dentry->d_inode->i_sem);
+
+ dentry = lookup_one_len(dname, rec_dir.dentry, HEXDIR_LEN-1);
+ if (IS_ERR(dentry)) {
+ status = PTR_ERR(dentry);
+ goto out_unlock;
+ }
+ status = -EEXIST;
+ if (dentry->d_inode) {
+ dprintk("NFSD: nfsd4_create_clid_dir: DIRECTORY EXISTS\n");
+ goto out_put;
+ }
+ status = vfs_mkdir(rec_dir.dentry->d_inode, dentry, S_IRWXU);
+out_put:
+ dput(dentry);
+out_unlock:
+ up(&rec_dir.dentry->d_inode->i_sem);
+ if (status == 0) {
+ clp->cl_firststate = 1;
+ status = nfsd4_rec_fsync(rec_dir.dentry);
+ }
+ nfs4_reset_user(uid, gid);
+ dprintk("NFSD: nfsd4_create_clid_dir returns %d\n", status);
+ return status;
+}
+
typedef int (recdir_func)(struct dentry *, struct dentry *);
struct dentry_list {
@@ -202,6 +266,111 @@ out:
}
static int
+nfsd4_remove_clid_file(struct dentry *dir, struct dentry *dentry)
+{
+ int status;
+
+ if (!S_ISREG(dir->d_inode->i_mode)) {
+ printk("nfsd4: non-file found in client recovery directory\n");
+ return -EINVAL;
+ }
+ down(&dir->d_inode->i_sem);
+ status = vfs_unlink(dir->d_inode, dentry);
+ up(&dir->d_inode->i_sem);
+ return status;
+}
+
+static int
+nfsd4_clear_clid_dir(struct dentry *dir, struct dentry *dentry)
+{
+ int status;
+
+ /* For now this directory should already be empty, but we empty it of
+ * any regular files anyway, just in case the directory was created by
+ * a kernel from the future.... */
+ nfsd4_list_rec_dir(dentry, nfsd4_remove_clid_file);
+ down(&dir->d_inode->i_sem);
+ status = vfs_rmdir(dir->d_inode, dentry);
+ up(&dir->d_inode->i_sem);
+ return status;
+}
+
+static int
+nfsd4_unlink_clid_dir(char *name, int namlen)
+{
+ struct dentry *dentry;
+ int status;
+
+ dprintk("NFSD: nfsd4_unlink_clid_dir. name %.*s\n", namlen, name);
+
+ dentry = lookup_one_len(name, rec_dir.dentry, namlen);
+ if (IS_ERR(dentry)) {
+ status = PTR_ERR(dentry);
+ return status;
+ }
+ status = -ENOENT;
+ if (!dentry->d_inode)
+ goto out;
+
+ status = nfsd4_clear_clid_dir(rec_dir.dentry, dentry);
+out:
+ dput(dentry);
+ return status;
+}
+
+void
+nfsd4_remove_clid_dir(struct nfs4_client *clp)
+{
+ uid_t uid;
+ gid_t gid;
+ int status;
+
+ if (!rec_dir_init || !clp->cl_firststate)
+ return;
+
+ nfs4_save_user(&uid, &gid);
+ status = nfsd4_unlink_clid_dir(clp->cl_recdir, HEXDIR_LEN-1);
+ nfs4_reset_user(uid, gid);
+ if (status == 0)
+ status = nfsd4_rec_fsync(rec_dir.dentry);
+ if (status)
+ printk("NFSD: Failed to remove expired client state directory"
+ " %.*s\n", HEXDIR_LEN, clp->cl_recdir);
+ return;
+}
+
+static int
+purge_old(struct dentry *parent, struct dentry *child)
+{
+ int status;
+
+ if (nfs4_has_reclaimed_state(child->d_name.name))
+ return nfs_ok;
+
+ status = nfsd4_clear_clid_dir(parent, child);
+ if (status)
+ printk("failed to remove client recovery directory %s\n",
+ child->d_name.name);
+ /* Keep trying, success or failure: */
+ return nfs_ok;
+}
+
+void
+nfsd4_recdir_purge_old(void) {
+ int status;
+
+ if (!rec_dir_init)
+ return;
+ status = nfsd4_list_rec_dir(rec_dir.dentry, purge_old);
+ if (status == 0)
+ status = nfsd4_rec_fsync(rec_dir.dentry);
+ if (status)
+ printk("nfsd4: failed to purge old clients from recovery"
+ " directory %s\n", rec_dir.dentry->d_name.name);
+ return;
+}
+
+static int
load_recdir(struct dentry *parent, struct dentry *child)
{
if (child->d_name.len != HEXDIR_LEN - 1) {
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index 6b9d23c39afe..6cca358cd650 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -905,6 +905,7 @@ nfsd4_setclientid_confirm(struct svc_rqst *rqstp, struct nfsd4_setclientid_confi
conf = find_confirmed_client_by_str(unconf->cl_recdir,
hash);
if (conf) {
+ nfsd4_remove_clid_dir(conf);
expire_client(conf);
}
move_to_confirmed(unconf);
@@ -1691,6 +1692,7 @@ nfs4_set_claim_prev(struct nfsd4_open *open, int *status)
*status = nfserr_reclaim_bad;
else {
open->op_stateowner->so_confirmed = 1;
+ open->op_stateowner->so_client->cl_firststate = 1;
open->op_stateowner->so_seqid--;
}
}
@@ -1903,6 +1905,7 @@ static void
end_grace(void)
{
dprintk("NFSD: end of grace period\n");
+ nfsd4_recdir_purge_old();
in_grace = 0;
}
@@ -1932,6 +1935,7 @@ nfs4_laundromat(void)
}
dprintk("NFSD: purging unused client (clientid %08x)\n",
clp->cl_clientid.cl_id);
+ nfsd4_remove_clid_dir(clp);
expire_client(clp);
}
INIT_LIST_HEAD(&reaplist);
@@ -2320,6 +2324,8 @@ nfsd4_open_confirm(struct svc_rqst *rqstp, struct svc_fh *current_fh, struct nfs
stp->st_stateid.si_stateownerid,
stp->st_stateid.si_fileid,
stp->st_stateid.si_generation);
+
+ nfsd4_create_clid_dir(sop->so_client);
out:
if (oc->oc_stateowner)
nfs4_get_stateowner(oc->oc_stateowner);
@@ -3089,6 +3095,16 @@ alloc_reclaim(void)
return kmalloc(sizeof(struct nfs4_client_reclaim), GFP_KERNEL);
}
+int
+nfs4_has_reclaimed_state(const char *name)
+{
+ unsigned int strhashval = clientstr_hashval(name);
+ struct nfs4_client *clp;
+
+ clp = find_confirmed_client_by_str(name, strhashval);
+ return clp ? 1 : 0;
+}
+
/*
* failure => all reset bets are off, nfserr_no_grace...
*/
diff --git a/include/linux/nfsd/state.h b/include/linux/nfsd/state.h
index 19481ab122df..a84a3fa99be1 100644
--- a/include/linux/nfsd/state.h
+++ b/include/linux/nfsd/state.h
@@ -131,6 +131,7 @@ struct nfs4_client {
nfs4_verifier cl_confirm; /* generated by server */
struct nfs4_callback cl_callback; /* callback info */
atomic_t cl_count; /* ref count */
+ u32 cl_firststate; /* recovery dir creation */
};
/* struct nfs4_client_reset
@@ -282,6 +283,10 @@ extern void nfsd4_init_recdir(char *recdir_name);
extern int nfsd4_recdir_load(void);
extern void nfsd4_shutdown_recdir(void);
extern int nfs4_client_to_reclaim(const char *name);
+extern int nfs4_has_reclaimed_state(const char *name);
+extern void nfsd4_recdir_purge_old(void);
+extern int nfsd4_create_clid_dir(struct nfs4_client *clp);
+extern void nfsd4_remove_clid_dir(struct nfs4_client *clp);
static inline void
nfs4_put_stateowner(struct nfs4_stateowner *so)
generated by cgit v1.2.3 (git 2.0.4) at 2024-11-07 20:09:12 +0000