cifs-$(CONFIG_CIFS_UPCALL) += cifs_spnego.o
-cifs-$(CONFIG_CIFS_DFS_UPCALL) += cifs_dfs_ref.o dfs_cache.o dfs.o
+cifs-$(CONFIG_CIFS_DFS_UPCALL) += namespace.o dfs_cache.o dfs.o
cifs-$(CONFIG_CIFS_SWN_UPCALL) += netlink.o cifs_swn.o
+++ /dev/null
-// SPDX-License-Identifier: GPL-2.0-or-later
-/*
- * Contains the CIFS DFS referral mounting routines used for handling
- * traversal via DFS junction point
- *
- * Copyright (c) 2007 Igor Mammedov
- * Copyright (C) International Business Machines Corp., 2008
- * Author(s): Igor Mammedov (niallain@gmail.com)
- * Steve French (sfrench@us.ibm.com)
- */
-
-#include <linux/dcache.h>
-#include <linux/mount.h>
-#include <linux/namei.h>
-#include <linux/slab.h>
-#include <linux/vfs.h>
-#include <linux/fs.h>
-#include <linux/inet.h>
-#include "cifsglob.h"
-#include "cifsproto.h"
-#include "cifsfs.h"
-#include "dns_resolve.h"
-#include "cifs_debug.h"
-#include "dfs.h"
-#include "fs_context.h"
-
-static LIST_HEAD(cifs_dfs_automount_list);
-
-static void cifs_dfs_expire_automounts(struct work_struct *work);
-static DECLARE_DELAYED_WORK(cifs_dfs_automount_task,
- cifs_dfs_expire_automounts);
-static int cifs_dfs_mountpoint_expiry_timeout = 500 * HZ;
-
-static void cifs_dfs_expire_automounts(struct work_struct *work)
-{
- struct list_head *list = &cifs_dfs_automount_list;
-
- mark_mounts_for_expiry(list);
- if (!list_empty(list))
- schedule_delayed_work(&cifs_dfs_automount_task,
- cifs_dfs_mountpoint_expiry_timeout);
-}
-
-void cifs_dfs_release_automount_timer(void)
-{
- BUG_ON(!list_empty(&cifs_dfs_automount_list));
- cancel_delayed_work_sync(&cifs_dfs_automount_task);
-}
-
-/**
- * cifs_build_devname - build a devicename from a UNC and optional prepath
- * @nodename: pointer to UNC string
- * @prepath: pointer to prefixpath (or NULL if there isn't one)
- *
- * Build a new cifs devicename after chasing a DFS referral. Allocate a buffer
- * big enough to hold the final thing. Copy the UNC from the nodename, and
- * concatenate the prepath onto the end of it if there is one.
- *
- * Returns pointer to the built string, or a ERR_PTR. Caller is responsible
- * for freeing the returned string.
- */
-char *
-cifs_build_devname(char *nodename, const char *prepath)
-{
- size_t pplen;
- size_t unclen;
- char *dev;
- char *pos;
-
- /* skip over any preceding delimiters */
- nodename += strspn(nodename, "\\");
- if (!*nodename)
- return ERR_PTR(-EINVAL);
-
- /* get length of UNC and set pos to last char */
- unclen = strlen(nodename);
- pos = nodename + unclen - 1;
-
- /* trim off any trailing delimiters */
- while (*pos == '\\') {
- --pos;
- --unclen;
- }
-
- /* allocate a buffer:
- * +2 for preceding "//"
- * +1 for delimiter between UNC and prepath
- * +1 for trailing NULL
- */
- pplen = prepath ? strlen(prepath) : 0;
- dev = kmalloc(2 + unclen + 1 + pplen + 1, GFP_KERNEL);
- if (!dev)
- return ERR_PTR(-ENOMEM);
-
- pos = dev;
- /* add the initial "//" */
- *pos = '/';
- ++pos;
- *pos = '/';
- ++pos;
-
- /* copy in the UNC portion from referral */
- memcpy(pos, nodename, unclen);
- pos += unclen;
-
- /* copy the prefixpath remainder (if there is one) */
- if (pplen) {
- *pos = '/';
- ++pos;
- memcpy(pos, prepath, pplen);
- pos += pplen;
- }
-
- /* NULL terminator */
- *pos = '\0';
-
- convert_delimiter(dev, '/');
- return dev;
-}
-
-static int set_dest_addr(struct smb3_fs_context *ctx)
-{
- struct sockaddr *addr = (struct sockaddr *)&ctx->dstaddr;
- int rc;
-
- rc = dns_resolve_server_name_to_ip(ctx->source, addr, NULL);
- if (!rc)
- cifs_set_port(addr, ctx->port);
- return rc;
-}
-
-/*
- * Create a vfsmount that we can automount
- */
-static struct vfsmount *cifs_dfs_do_automount(struct path *path)
-{
- int rc;
- struct dentry *mntpt = path->dentry;
- struct fs_context *fc;
- struct cifs_sb_info *cifs_sb;
- void *page = NULL;
- struct smb3_fs_context *ctx, *cur_ctx;
- struct smb3_fs_context tmp;
- char *full_path;
- struct vfsmount *mnt;
-
- if (IS_ROOT(mntpt))
- return ERR_PTR(-ESTALE);
-
- /*
- * The MSDFS spec states that paths in DFS referral requests and
- * responses must be prefixed by a single '\' character instead of
- * the double backslashes usually used in the UNC. This function
- * gives us the latter, so we must adjust the result.
- */
- cifs_sb = CIFS_SB(mntpt->d_sb);
- if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS)
- return ERR_PTR(-EREMOTE);
-
- cur_ctx = cifs_sb->ctx;
-
- fc = fs_context_for_submount(path->mnt->mnt_sb->s_type, mntpt);
- if (IS_ERR(fc))
- return ERR_CAST(fc);
-
- ctx = smb3_fc2context(fc);
-
- page = alloc_dentry_path();
- full_path = dfs_get_automount_devname(mntpt, page);
- if (IS_ERR(full_path)) {
- mnt = ERR_CAST(full_path);
- goto out;
- }
-
- tmp = *cur_ctx;
- tmp.source = NULL;
- tmp.leaf_fullpath = NULL;
- tmp.UNC = tmp.prepath = NULL;
- tmp.dfs_root_ses = NULL;
-
- rc = smb3_fs_context_dup(ctx, &tmp);
- if (rc) {
- mnt = ERR_PTR(rc);
- goto out;
- }
-
- rc = smb3_parse_devname(full_path, ctx);
- if (rc) {
- mnt = ERR_PTR(rc);
- goto out;
- }
-
- ctx->source = smb3_fs_context_fullpath(ctx, '/');
- if (IS_ERR(ctx->source)) {
- mnt = ERR_CAST(ctx->source);
- ctx->source = NULL;
- goto out;
- }
- cifs_dbg(FYI, "%s: ctx: source=%s UNC=%s prepath=%s dstaddr=%pISpc\n",
- __func__, ctx->source, ctx->UNC, ctx->prepath, &ctx->dstaddr);
-
- rc = set_dest_addr(ctx);
- if (!rc)
- mnt = fc_mount(fc);
- else
- mnt = ERR_PTR(rc);
-
-out:
- put_fs_context(fc);
- free_dentry_path(page);
- return mnt;
-}
-
-/*
- * Attempt to automount the referral
- */
-struct vfsmount *cifs_dfs_d_automount(struct path *path)
-{
- struct vfsmount *newmnt;
-
- cifs_dbg(FYI, "%s: %pd\n", __func__, path->dentry);
-
- newmnt = cifs_dfs_do_automount(path);
- if (IS_ERR(newmnt)) {
- cifs_dbg(FYI, "leaving %s [automount failed]\n" , __func__);
- return newmnt;
- }
-
- mntget(newmnt); /* prevent immediate expiration */
- mnt_set_expiry(newmnt, &cifs_dfs_automount_list);
- schedule_delayed_work(&cifs_dfs_automount_task,
- cifs_dfs_mountpoint_expiry_timeout);
- cifs_dbg(FYI, "leaving %s [ok]\n" , __func__);
- return newmnt;
-}
-
-const struct inode_operations cifs_dfs_referral_inode_operations = {
-};
--- /dev/null
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Contains the CIFS DFS referral mounting routines used for handling
+ * traversal via DFS junction point
+ *
+ * Copyright (c) 2007 Igor Mammedov
+ * Copyright (C) International Business Machines Corp., 2008
+ * Author(s): Igor Mammedov (niallain@gmail.com)
+ * Steve French (sfrench@us.ibm.com)
+ */
+
+#include <linux/dcache.h>
+#include <linux/mount.h>
+#include <linux/namei.h>
+#include <linux/slab.h>
+#include <linux/vfs.h>
+#include <linux/fs.h>
+#include <linux/inet.h>
+#include "cifsglob.h"
+#include "cifsproto.h"
+#include "cifsfs.h"
+#include "dns_resolve.h"
+#include "cifs_debug.h"
+#include "dfs.h"
+#include "fs_context.h"
+
+static LIST_HEAD(cifs_dfs_automount_list);
+
+static void cifs_dfs_expire_automounts(struct work_struct *work);
+static DECLARE_DELAYED_WORK(cifs_dfs_automount_task,
+ cifs_dfs_expire_automounts);
+static int cifs_dfs_mountpoint_expiry_timeout = 500 * HZ;
+
+static void cifs_dfs_expire_automounts(struct work_struct *work)
+{
+ struct list_head *list = &cifs_dfs_automount_list;
+
+ mark_mounts_for_expiry(list);
+ if (!list_empty(list))
+ schedule_delayed_work(&cifs_dfs_automount_task,
+ cifs_dfs_mountpoint_expiry_timeout);
+}
+
+void cifs_dfs_release_automount_timer(void)
+{
+ BUG_ON(!list_empty(&cifs_dfs_automount_list));
+ cancel_delayed_work_sync(&cifs_dfs_automount_task);
+}
+
+/**
+ * cifs_build_devname - build a devicename from a UNC and optional prepath
+ * @nodename: pointer to UNC string
+ * @prepath: pointer to prefixpath (or NULL if there isn't one)
+ *
+ * Build a new cifs devicename after chasing a DFS referral. Allocate a buffer
+ * big enough to hold the final thing. Copy the UNC from the nodename, and
+ * concatenate the prepath onto the end of it if there is one.
+ *
+ * Returns pointer to the built string, or a ERR_PTR. Caller is responsible
+ * for freeing the returned string.
+ */
+char *
+cifs_build_devname(char *nodename, const char *prepath)
+{
+ size_t pplen;
+ size_t unclen;
+ char *dev;
+ char *pos;
+
+ /* skip over any preceding delimiters */
+ nodename += strspn(nodename, "\\");
+ if (!*nodename)
+ return ERR_PTR(-EINVAL);
+
+ /* get length of UNC and set pos to last char */
+ unclen = strlen(nodename);
+ pos = nodename + unclen - 1;
+
+ /* trim off any trailing delimiters */
+ while (*pos == '\\') {
+ --pos;
+ --unclen;
+ }
+
+ /* allocate a buffer:
+ * +2 for preceding "//"
+ * +1 for delimiter between UNC and prepath
+ * +1 for trailing NULL
+ */
+ pplen = prepath ? strlen(prepath) : 0;
+ dev = kmalloc(2 + unclen + 1 + pplen + 1, GFP_KERNEL);
+ if (!dev)
+ return ERR_PTR(-ENOMEM);
+
+ pos = dev;
+ /* add the initial "//" */
+ *pos = '/';
+ ++pos;
+ *pos = '/';
+ ++pos;
+
+ /* copy in the UNC portion from referral */
+ memcpy(pos, nodename, unclen);
+ pos += unclen;
+
+ /* copy the prefixpath remainder (if there is one) */
+ if (pplen) {
+ *pos = '/';
+ ++pos;
+ memcpy(pos, prepath, pplen);
+ pos += pplen;
+ }
+
+ /* NULL terminator */
+ *pos = '\0';
+
+ convert_delimiter(dev, '/');
+ return dev;
+}
+
+static int set_dest_addr(struct smb3_fs_context *ctx)
+{
+ struct sockaddr *addr = (struct sockaddr *)&ctx->dstaddr;
+ int rc;
+
+ rc = dns_resolve_server_name_to_ip(ctx->source, addr, NULL);
+ if (!rc)
+ cifs_set_port(addr, ctx->port);
+ return rc;
+}
+
+/*
+ * Create a vfsmount that we can automount
+ */
+static struct vfsmount *cifs_dfs_do_automount(struct path *path)
+{
+ int rc;
+ struct dentry *mntpt = path->dentry;
+ struct fs_context *fc;
+ struct cifs_sb_info *cifs_sb;
+ void *page = NULL;
+ struct smb3_fs_context *ctx, *cur_ctx;
+ struct smb3_fs_context tmp;
+ char *full_path;
+ struct vfsmount *mnt;
+
+ if (IS_ROOT(mntpt))
+ return ERR_PTR(-ESTALE);
+
+ /*
+ * The MSDFS spec states that paths in DFS referral requests and
+ * responses must be prefixed by a single '\' character instead of
+ * the double backslashes usually used in the UNC. This function
+ * gives us the latter, so we must adjust the result.
+ */
+ cifs_sb = CIFS_SB(mntpt->d_sb);
+ if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_NO_DFS)
+ return ERR_PTR(-EREMOTE);
+
+ cur_ctx = cifs_sb->ctx;
+
+ fc = fs_context_for_submount(path->mnt->mnt_sb->s_type, mntpt);
+ if (IS_ERR(fc))
+ return ERR_CAST(fc);
+
+ ctx = smb3_fc2context(fc);
+
+ page = alloc_dentry_path();
+ full_path = dfs_get_automount_devname(mntpt, page);
+ if (IS_ERR(full_path)) {
+ mnt = ERR_CAST(full_path);
+ goto out;
+ }
+
+ tmp = *cur_ctx;
+ tmp.source = NULL;
+ tmp.leaf_fullpath = NULL;
+ tmp.UNC = tmp.prepath = NULL;
+ tmp.dfs_root_ses = NULL;
+
+ rc = smb3_fs_context_dup(ctx, &tmp);
+ if (rc) {
+ mnt = ERR_PTR(rc);
+ goto out;
+ }
+
+ rc = smb3_parse_devname(full_path, ctx);
+ if (rc) {
+ mnt = ERR_PTR(rc);
+ goto out;
+ }
+
+ ctx->source = smb3_fs_context_fullpath(ctx, '/');
+ if (IS_ERR(ctx->source)) {
+ mnt = ERR_CAST(ctx->source);
+ ctx->source = NULL;
+ goto out;
+ }
+ cifs_dbg(FYI, "%s: ctx: source=%s UNC=%s prepath=%s dstaddr=%pISpc\n",
+ __func__, ctx->source, ctx->UNC, ctx->prepath, &ctx->dstaddr);
+
+ rc = set_dest_addr(ctx);
+ if (!rc)
+ mnt = fc_mount(fc);
+ else
+ mnt = ERR_PTR(rc);
+
+out:
+ put_fs_context(fc);
+ free_dentry_path(page);
+ return mnt;
+}
+
+/*
+ * Attempt to automount the referral
+ */
+struct vfsmount *cifs_dfs_d_automount(struct path *path)
+{
+ struct vfsmount *newmnt;
+
+ cifs_dbg(FYI, "%s: %pd\n", __func__, path->dentry);
+
+ newmnt = cifs_dfs_do_automount(path);
+ if (IS_ERR(newmnt)) {
+ cifs_dbg(FYI, "leaving %s [automount failed]\n" , __func__);
+ return newmnt;
+ }
+
+ mntget(newmnt); /* prevent immediate expiration */
+ mnt_set_expiry(newmnt, &cifs_dfs_automount_list);
+ schedule_delayed_work(&cifs_dfs_automount_task,
+ cifs_dfs_mountpoint_expiry_timeout);
+ cifs_dbg(FYI, "leaving %s [ok]\n" , __func__);
+ return newmnt;
+}
+
+const struct inode_operations cifs_dfs_referral_inode_operations = {
+};
projects / platform / kernel / linux-starfive.git / commitdiff