v4.19.13 snapshot.
diff --git a/fs/orangefs/super.c b/fs/orangefs/super.c
new file mode 100644
index 0000000..dfaee90
--- /dev/null
+++ b/fs/orangefs/super.c
@@ -0,0 +1,641 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * (C) 2001 Clemson University and The University of Chicago
+ *
+ * See COPYING in top-level directory.
+ */
+
+#include "protocol.h"
+#include "orangefs-kernel.h"
+#include "orangefs-bufmap.h"
+
+#include <linux/parser.h>
+
+/* a cache for orangefs-inode objects (i.e. orangefs inode private data) */
+static struct kmem_cache *orangefs_inode_cache;
+
+/* list for storing orangefs specific superblocks in use */
+LIST_HEAD(orangefs_superblocks);
+
+DEFINE_SPINLOCK(orangefs_superblocks_lock);
+
+enum {
+ Opt_intr,
+ Opt_acl,
+ Opt_local_lock,
+
+ Opt_err
+};
+
+static const match_table_t tokens = {
+ { Opt_acl, "acl" },
+ { Opt_intr, "intr" },
+ { Opt_local_lock, "local_lock" },
+ { Opt_err, NULL }
+};
+
+uint64_t orangefs_features;
+
+static int orangefs_show_options(struct seq_file *m, struct dentry *root)
+{
+ struct orangefs_sb_info_s *orangefs_sb = ORANGEFS_SB(root->d_sb);
+
+ if (root->d_sb->s_flags & SB_POSIXACL)
+ seq_puts(m, ",acl");
+ if (orangefs_sb->flags & ORANGEFS_OPT_INTR)
+ seq_puts(m, ",intr");
+ if (orangefs_sb->flags & ORANGEFS_OPT_LOCAL_LOCK)
+ seq_puts(m, ",local_lock");
+ return 0;
+}
+
+static int parse_mount_options(struct super_block *sb, char *options,
+ int silent)
+{
+ struct orangefs_sb_info_s *orangefs_sb = ORANGEFS_SB(sb);
+ substring_t args[MAX_OPT_ARGS];
+ char *p;
+
+ /*
+ * Force any potential flags that might be set from the mount
+ * to zero, ie, initialize to unset.
+ */
+ sb->s_flags &= ~SB_POSIXACL;
+ orangefs_sb->flags &= ~ORANGEFS_OPT_INTR;
+ orangefs_sb->flags &= ~ORANGEFS_OPT_LOCAL_LOCK;
+
+ while ((p = strsep(&options, ",")) != NULL) {
+ int token;
+
+ if (!*p)
+ continue;
+
+ token = match_token(p, tokens, args);
+ switch (token) {
+ case Opt_acl:
+ sb->s_flags |= SB_POSIXACL;
+ break;
+ case Opt_intr:
+ orangefs_sb->flags |= ORANGEFS_OPT_INTR;
+ break;
+ case Opt_local_lock:
+ orangefs_sb->flags |= ORANGEFS_OPT_LOCAL_LOCK;
+ break;
+ default:
+ goto fail;
+ }
+ }
+
+ return 0;
+fail:
+ if (!silent)
+ gossip_err("Error: mount option [%s] is not supported.\n", p);
+ return -EINVAL;
+}
+
+static void orangefs_inode_cache_ctor(void *req)
+{
+ struct orangefs_inode_s *orangefs_inode = req;
+
+ inode_init_once(&orangefs_inode->vfs_inode);
+ init_rwsem(&orangefs_inode->xattr_sem);
+}
+
+static struct inode *orangefs_alloc_inode(struct super_block *sb)
+{
+ struct orangefs_inode_s *orangefs_inode;
+
+ orangefs_inode = kmem_cache_alloc(orangefs_inode_cache, GFP_KERNEL);
+ if (!orangefs_inode)
+ return NULL;
+
+ /*
+ * We want to clear everything except for rw_semaphore and the
+ * vfs_inode.
+ */
+ memset(&orangefs_inode->refn.khandle, 0, 16);
+ orangefs_inode->refn.fs_id = ORANGEFS_FS_ID_NULL;
+ orangefs_inode->last_failed_block_index_read = 0;
+ memset(orangefs_inode->link_target, 0, sizeof(orangefs_inode->link_target));
+
+ gossip_debug(GOSSIP_SUPER_DEBUG,
+ "orangefs_alloc_inode: allocated %p\n",
+ &orangefs_inode->vfs_inode);
+ return &orangefs_inode->vfs_inode;
+}
+
+static void orangefs_i_callback(struct rcu_head *head)
+{
+ struct inode *inode = container_of(head, struct inode, i_rcu);
+ struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+ kmem_cache_free(orangefs_inode_cache, orangefs_inode);
+}
+
+static void orangefs_destroy_inode(struct inode *inode)
+{
+ struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+
+ gossip_debug(GOSSIP_SUPER_DEBUG,
+ "%s: deallocated %p destroying inode %pU\n",
+ __func__, orangefs_inode, get_khandle_from_ino(inode));
+
+ call_rcu(&inode->i_rcu, orangefs_i_callback);
+}
+
+/*
+ * NOTE: information filled in here is typically reflected in the
+ * output of the system command 'df'
+*/
+static int orangefs_statfs(struct dentry *dentry, struct kstatfs *buf)
+{
+ int ret = -ENOMEM;
+ struct orangefs_kernel_op_s *new_op = NULL;
+ int flags = 0;
+ struct super_block *sb = NULL;
+
+ sb = dentry->d_sb;
+
+ gossip_debug(GOSSIP_SUPER_DEBUG,
+ "%s: called on sb %p (fs_id is %d)\n",
+ __func__,
+ sb,
+ (int)(ORANGEFS_SB(sb)->fs_id));
+
+ new_op = op_alloc(ORANGEFS_VFS_OP_STATFS);
+ if (!new_op)
+ return ret;
+ new_op->upcall.req.statfs.fs_id = ORANGEFS_SB(sb)->fs_id;
+
+ if (ORANGEFS_SB(sb)->flags & ORANGEFS_OPT_INTR)
+ flags = ORANGEFS_OP_INTERRUPTIBLE;
+
+ ret = service_operation(new_op, "orangefs_statfs", flags);
+
+ if (new_op->downcall.status < 0)
+ goto out_op_release;
+
+ gossip_debug(GOSSIP_SUPER_DEBUG,
+ "%s: got %ld blocks available | "
+ "%ld blocks total | %ld block size | "
+ "%ld files total | %ld files avail\n",
+ __func__,
+ (long)new_op->downcall.resp.statfs.blocks_avail,
+ (long)new_op->downcall.resp.statfs.blocks_total,
+ (long)new_op->downcall.resp.statfs.block_size,
+ (long)new_op->downcall.resp.statfs.files_total,
+ (long)new_op->downcall.resp.statfs.files_avail);
+
+ buf->f_type = sb->s_magic;
+ memcpy(&buf->f_fsid, &ORANGEFS_SB(sb)->fs_id, sizeof(buf->f_fsid));
+ buf->f_bsize = new_op->downcall.resp.statfs.block_size;
+ buf->f_namelen = ORANGEFS_NAME_MAX;
+
+ buf->f_blocks = (sector_t) new_op->downcall.resp.statfs.blocks_total;
+ buf->f_bfree = (sector_t) new_op->downcall.resp.statfs.blocks_avail;
+ buf->f_bavail = (sector_t) new_op->downcall.resp.statfs.blocks_avail;
+ buf->f_files = (sector_t) new_op->downcall.resp.statfs.files_total;
+ buf->f_ffree = (sector_t) new_op->downcall.resp.statfs.files_avail;
+ buf->f_frsize = sb->s_blocksize;
+
+out_op_release:
+ op_release(new_op);
+ gossip_debug(GOSSIP_SUPER_DEBUG, "%s: returning %d\n", __func__, ret);
+ return ret;
+}
+
+/*
+ * Remount as initiated by VFS layer. We just need to reparse the mount
+ * options, no need to signal pvfs2-client-core about it.
+ */
+static int orangefs_remount_fs(struct super_block *sb, int *flags, char *data)
+{
+ gossip_debug(GOSSIP_SUPER_DEBUG, "orangefs_remount_fs: called\n");
+ return parse_mount_options(sb, data, 1);
+}
+
+/*
+ * Remount as initiated by pvfs2-client-core on restart. This is used to
+ * repopulate mount information left from previous pvfs2-client-core.
+ *
+ * the idea here is that given a valid superblock, we're
+ * re-initializing the user space client with the initial mount
+ * information specified when the super block was first initialized.
+ * this is very different than the first initialization/creation of a
+ * superblock. we use the special service_priority_operation to make
+ * sure that the mount gets ahead of any other pending operation that
+ * is waiting for servicing. this means that the pvfs2-client won't
+ * fail to start several times for all other pending operations before
+ * the client regains all of the mount information from us.
+ * NOTE: this function assumes that the request_mutex is already acquired!
+ */
+int orangefs_remount(struct orangefs_sb_info_s *orangefs_sb)
+{
+ struct orangefs_kernel_op_s *new_op;
+ int ret = -EINVAL;
+
+ gossip_debug(GOSSIP_SUPER_DEBUG, "orangefs_remount: called\n");
+
+ new_op = op_alloc(ORANGEFS_VFS_OP_FS_MOUNT);
+ if (!new_op)
+ return -ENOMEM;
+ strncpy(new_op->upcall.req.fs_mount.orangefs_config_server,
+ orangefs_sb->devname,
+ ORANGEFS_MAX_SERVER_ADDR_LEN);
+
+ gossip_debug(GOSSIP_SUPER_DEBUG,
+ "Attempting ORANGEFS Remount via host %s\n",
+ new_op->upcall.req.fs_mount.orangefs_config_server);
+
+ /*
+ * we assume that the calling function has already acquired the
+ * request_mutex to prevent other operations from bypassing
+ * this one
+ */
+ ret = service_operation(new_op, "orangefs_remount",
+ ORANGEFS_OP_PRIORITY | ORANGEFS_OP_NO_MUTEX);
+ gossip_debug(GOSSIP_SUPER_DEBUG,
+ "orangefs_remount: mount got return value of %d\n",
+ ret);
+ if (ret == 0) {
+ /*
+ * store the id assigned to this sb -- it's just a
+ * short-lived mapping that the system interface uses
+ * to map this superblock to a particular mount entry
+ */
+ orangefs_sb->id = new_op->downcall.resp.fs_mount.id;
+ orangefs_sb->mount_pending = 0;
+ }
+
+ op_release(new_op);
+
+ if (orangefs_userspace_version >= 20906) {
+ new_op = op_alloc(ORANGEFS_VFS_OP_FEATURES);
+ if (!new_op)
+ return -ENOMEM;
+ new_op->upcall.req.features.features = 0;
+ ret = service_operation(new_op, "orangefs_features",
+ ORANGEFS_OP_PRIORITY | ORANGEFS_OP_NO_MUTEX);
+ if (!ret)
+ orangefs_features =
+ new_op->downcall.resp.features.features;
+ else
+ orangefs_features = 0;
+ op_release(new_op);
+ } else {
+ orangefs_features = 0;
+ }
+
+ return ret;
+}
+
+int fsid_key_table_initialize(void)
+{
+ return 0;
+}
+
+void fsid_key_table_finalize(void)
+{
+}
+
+static const struct super_operations orangefs_s_ops = {
+ .alloc_inode = orangefs_alloc_inode,
+ .destroy_inode = orangefs_destroy_inode,
+ .drop_inode = generic_delete_inode,
+ .statfs = orangefs_statfs,
+ .remount_fs = orangefs_remount_fs,
+ .show_options = orangefs_show_options,
+};
+
+static struct dentry *orangefs_fh_to_dentry(struct super_block *sb,
+ struct fid *fid,
+ int fh_len,
+ int fh_type)
+{
+ struct orangefs_object_kref refn;
+
+ if (fh_len < 5 || fh_type > 2)
+ return NULL;
+
+ ORANGEFS_khandle_from(&(refn.khandle), fid->raw, 16);
+ refn.fs_id = (u32) fid->raw[4];
+ gossip_debug(GOSSIP_SUPER_DEBUG,
+ "fh_to_dentry: handle %pU, fs_id %d\n",
+ &refn.khandle,
+ refn.fs_id);
+
+ return d_obtain_alias(orangefs_iget(sb, &refn));
+}
+
+static int orangefs_encode_fh(struct inode *inode,
+ __u32 *fh,
+ int *max_len,
+ struct inode *parent)
+{
+ int len = parent ? 10 : 5;
+ int type = 1;
+ struct orangefs_object_kref refn;
+
+ if (*max_len < len) {
+ gossip_err("fh buffer is too small for encoding\n");
+ *max_len = len;
+ type = 255;
+ goto out;
+ }
+
+ refn = ORANGEFS_I(inode)->refn;
+ ORANGEFS_khandle_to(&refn.khandle, fh, 16);
+ fh[4] = refn.fs_id;
+
+ gossip_debug(GOSSIP_SUPER_DEBUG,
+ "Encoding fh: handle %pU, fsid %u\n",
+ &refn.khandle,
+ refn.fs_id);
+
+
+ if (parent) {
+ refn = ORANGEFS_I(parent)->refn;
+ ORANGEFS_khandle_to(&refn.khandle, (char *) fh + 20, 16);
+ fh[9] = refn.fs_id;
+
+ type = 2;
+ gossip_debug(GOSSIP_SUPER_DEBUG,
+ "Encoding parent: handle %pU, fsid %u\n",
+ &refn.khandle,
+ refn.fs_id);
+ }
+ *max_len = len;
+
+out:
+ return type;
+}
+
+static const struct export_operations orangefs_export_ops = {
+ .encode_fh = orangefs_encode_fh,
+ .fh_to_dentry = orangefs_fh_to_dentry,
+};
+
+static int orangefs_unmount(int id, __s32 fs_id, const char *devname)
+{
+ struct orangefs_kernel_op_s *op;
+ int r;
+ op = op_alloc(ORANGEFS_VFS_OP_FS_UMOUNT);
+ if (!op)
+ return -ENOMEM;
+ op->upcall.req.fs_umount.id = id;
+ op->upcall.req.fs_umount.fs_id = fs_id;
+ strncpy(op->upcall.req.fs_umount.orangefs_config_server,
+ devname, ORANGEFS_MAX_SERVER_ADDR_LEN - 1);
+ r = service_operation(op, "orangefs_fs_umount", 0);
+ /* Not much to do about an error here. */
+ if (r)
+ gossip_err("orangefs_unmount: service_operation %d\n", r);
+ op_release(op);
+ return r;
+}
+
+static int orangefs_fill_sb(struct super_block *sb,
+ struct orangefs_fs_mount_response *fs_mount,
+ void *data, int silent)
+{
+ int ret = -EINVAL;
+ struct inode *root = NULL;
+ struct dentry *root_dentry = NULL;
+ struct orangefs_object_kref root_object;
+
+ /* alloc and init our private orangefs sb info */
+ sb->s_fs_info = kzalloc(sizeof(struct orangefs_sb_info_s), GFP_KERNEL);
+ if (!ORANGEFS_SB(sb))
+ return -ENOMEM;
+ ORANGEFS_SB(sb)->sb = sb;
+
+ ORANGEFS_SB(sb)->root_khandle = fs_mount->root_khandle;
+ ORANGEFS_SB(sb)->fs_id = fs_mount->fs_id;
+ ORANGEFS_SB(sb)->id = fs_mount->id;
+
+ if (data) {
+ ret = parse_mount_options(sb, data, silent);
+ if (ret)
+ return ret;
+ }
+
+ /* Hang the xattr handlers off the superblock */
+ sb->s_xattr = orangefs_xattr_handlers;
+ sb->s_magic = ORANGEFS_SUPER_MAGIC;
+ sb->s_op = &orangefs_s_ops;
+ sb->s_d_op = &orangefs_dentry_operations;
+
+ sb->s_blocksize = PAGE_SIZE;
+ sb->s_blocksize_bits = PAGE_SHIFT;
+ sb->s_maxbytes = MAX_LFS_FILESIZE;
+
+ root_object.khandle = ORANGEFS_SB(sb)->root_khandle;
+ root_object.fs_id = ORANGEFS_SB(sb)->fs_id;
+ gossip_debug(GOSSIP_SUPER_DEBUG,
+ "get inode %pU, fsid %d\n",
+ &root_object.khandle,
+ root_object.fs_id);
+
+ root = orangefs_iget(sb, &root_object);
+ if (IS_ERR(root))
+ return PTR_ERR(root);
+
+ gossip_debug(GOSSIP_SUPER_DEBUG,
+ "Allocated root inode [%p] with mode %x\n",
+ root,
+ root->i_mode);
+
+ /* allocates and places root dentry in dcache */
+ root_dentry = d_make_root(root);
+ if (!root_dentry)
+ return -ENOMEM;
+
+ sb->s_export_op = &orangefs_export_ops;
+ sb->s_root = root_dentry;
+ return 0;
+}
+
+struct dentry *orangefs_mount(struct file_system_type *fst,
+ int flags,
+ const char *devname,
+ void *data)
+{
+ int ret = -EINVAL;
+ struct super_block *sb = ERR_PTR(-EINVAL);
+ struct orangefs_kernel_op_s *new_op;
+ struct dentry *d = ERR_PTR(-EINVAL);
+
+ gossip_debug(GOSSIP_SUPER_DEBUG,
+ "orangefs_mount: called with devname %s\n",
+ devname);
+
+ if (!devname) {
+ gossip_err("ERROR: device name not specified.\n");
+ return ERR_PTR(-EINVAL);
+ }
+
+ new_op = op_alloc(ORANGEFS_VFS_OP_FS_MOUNT);
+ if (!new_op)
+ return ERR_PTR(-ENOMEM);
+
+ strncpy(new_op->upcall.req.fs_mount.orangefs_config_server,
+ devname,
+ ORANGEFS_MAX_SERVER_ADDR_LEN - 1);
+
+ gossip_debug(GOSSIP_SUPER_DEBUG,
+ "Attempting ORANGEFS Mount via host %s\n",
+ new_op->upcall.req.fs_mount.orangefs_config_server);
+
+ ret = service_operation(new_op, "orangefs_mount", 0);
+ gossip_debug(GOSSIP_SUPER_DEBUG,
+ "orangefs_mount: mount got return value of %d\n", ret);
+ if (ret)
+ goto free_op;
+
+ if (new_op->downcall.resp.fs_mount.fs_id == ORANGEFS_FS_ID_NULL) {
+ gossip_err("ERROR: Retrieved null fs_id\n");
+ ret = -EINVAL;
+ goto free_op;
+ }
+
+ sb = sget(fst, NULL, set_anon_super, flags, NULL);
+
+ if (IS_ERR(sb)) {
+ d = ERR_CAST(sb);
+ orangefs_unmount(new_op->downcall.resp.fs_mount.id,
+ new_op->downcall.resp.fs_mount.fs_id, devname);
+ goto free_op;
+ }
+
+ ret = orangefs_fill_sb(sb,
+ &new_op->downcall.resp.fs_mount, data,
+ flags & SB_SILENT ? 1 : 0);
+
+ if (ret) {
+ d = ERR_PTR(ret);
+ goto free_sb_and_op;
+ }
+
+ /*
+ * on successful mount, store the devname and data
+ * used
+ */
+ strncpy(ORANGEFS_SB(sb)->devname,
+ devname,
+ ORANGEFS_MAX_SERVER_ADDR_LEN - 1);
+
+ /* mount_pending must be cleared */
+ ORANGEFS_SB(sb)->mount_pending = 0;
+
+ /*
+ * finally, add this sb to our list of known orangefs
+ * sb's
+ */
+ gossip_debug(GOSSIP_SUPER_DEBUG,
+ "Adding SB %p to orangefs superblocks\n",
+ ORANGEFS_SB(sb));
+ spin_lock(&orangefs_superblocks_lock);
+ list_add_tail(&ORANGEFS_SB(sb)->list, &orangefs_superblocks);
+ spin_unlock(&orangefs_superblocks_lock);
+ op_release(new_op);
+
+ /* Must be removed from the list now. */
+ ORANGEFS_SB(sb)->no_list = 0;
+
+ if (orangefs_userspace_version >= 20906) {
+ new_op = op_alloc(ORANGEFS_VFS_OP_FEATURES);
+ if (!new_op)
+ return ERR_PTR(-ENOMEM);
+ new_op->upcall.req.features.features = 0;
+ ret = service_operation(new_op, "orangefs_features", 0);
+ orangefs_features = new_op->downcall.resp.features.features;
+ op_release(new_op);
+ } else {
+ orangefs_features = 0;
+ }
+
+ return dget(sb->s_root);
+
+free_sb_and_op:
+ /* Will call orangefs_kill_sb with sb not in list. */
+ ORANGEFS_SB(sb)->no_list = 1;
+ /* ORANGEFS_VFS_OP_FS_UMOUNT is done by orangefs_kill_sb. */
+ deactivate_locked_super(sb);
+free_op:
+ gossip_err("orangefs_mount: mount request failed with %d\n", ret);
+ if (ret == -EINVAL) {
+ gossip_err("Ensure that all orangefs-servers have the same FS configuration files\n");
+ gossip_err("Look at pvfs2-client-core log file (typically /tmp/pvfs2-client.log) for more details\n");
+ }
+
+ op_release(new_op);
+
+ return d;
+}
+
+void orangefs_kill_sb(struct super_block *sb)
+{
+ int r;
+ gossip_debug(GOSSIP_SUPER_DEBUG, "orangefs_kill_sb: called\n");
+
+ /* provided sb cleanup */
+ kill_anon_super(sb);
+
+ if (!ORANGEFS_SB(sb)) {
+ mutex_lock(&orangefs_request_mutex);
+ mutex_unlock(&orangefs_request_mutex);
+ return;
+ }
+ /*
+ * issue the unmount to userspace to tell it to remove the
+ * dynamic mount info it has for this superblock
+ */
+ r = orangefs_unmount(ORANGEFS_SB(sb)->id, ORANGEFS_SB(sb)->fs_id,
+ ORANGEFS_SB(sb)->devname);
+ if (!r)
+ ORANGEFS_SB(sb)->mount_pending = 1;
+
+ if (!ORANGEFS_SB(sb)->no_list) {
+ /* remove the sb from our list of orangefs specific sb's */
+ spin_lock(&orangefs_superblocks_lock);
+ /* not list_del_init */
+ __list_del_entry(&ORANGEFS_SB(sb)->list);
+ ORANGEFS_SB(sb)->list.prev = NULL;
+ spin_unlock(&orangefs_superblocks_lock);
+ }
+
+ /*
+ * make sure that ORANGEFS_DEV_REMOUNT_ALL loop that might've seen us
+ * gets completed before we free the dang thing.
+ */
+ mutex_lock(&orangefs_request_mutex);
+ mutex_unlock(&orangefs_request_mutex);
+
+ /* free the orangefs superblock private data */
+ kfree(ORANGEFS_SB(sb));
+}
+
+int orangefs_inode_cache_initialize(void)
+{
+ orangefs_inode_cache = kmem_cache_create_usercopy(
+ "orangefs_inode_cache",
+ sizeof(struct orangefs_inode_s),
+ 0,
+ ORANGEFS_CACHE_CREATE_FLAGS,
+ offsetof(struct orangefs_inode_s,
+ link_target),
+ sizeof_field(struct orangefs_inode_s,
+ link_target),
+ orangefs_inode_cache_ctor);
+
+ if (!orangefs_inode_cache) {
+ gossip_err("Cannot create orangefs_inode_cache\n");
+ return -ENOMEM;
+ }
+ return 0;
+}
+
+int orangefs_inode_cache_finalize(void)
+{
+ kmem_cache_destroy(orangefs_inode_cache);
+ return 0;
+}