Merge git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6

* git://git.kernel.org/pub/scm/linux/kernel/git/sfrench/cifs-2.6:
  cifs: drop spinlock before calling cifs_put_tlink
  cifs: fix expand_dfs_referral
  cifs: move bdi_setup_and_register outside of CONFIG_CIFS_DFS_UPCALL
  cifs: factor smb_vol allocation out of cifs_setup_volume_info
  cifs: have cifs_cleanup_volume_info not take a double pointer
  cifs: fix build_unc_path_to_root to account for a prefixpath
  cifs: remove bogus call to cifs_cleanup_volume_info

diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 35f9154..3e29899 100644 (file)
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -649,9 +649,9 @@ cifs_do_mount(struct file_system_type *fs_type,
 
        cFYI(1, "Devname: %s flags: %d ", dev_name, flags);
 
-       rc = cifs_setup_volume_info(&volume_info, (char *)data, dev_name);
-       if (rc)
-               return ERR_PTR(rc);
+       volume_info = cifs_get_volume_info((char *)data, dev_name);
+       if (IS_ERR(volume_info))
+               return ERR_CAST(volume_info);
 
        cifs_sb = kzalloc(sizeof(struct cifs_sb_info), GFP_KERNEL);
        if (cifs_sb == NULL) {
@@ -713,7 +713,7 @@ cifs_do_mount(struct file_system_type *fs_type,
 out_super:
        deactivate_locked_super(sb);
 out:
-       cifs_cleanup_volume_info(&volume_info);
+       cifs_cleanup_volume_info(volume_info);
        return root;
 
 out_mountdata:

diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h
index 257f312..8df28e9 100644 (file)
--- a/fs/cifs/cifsproto.h
+++ b/fs/cifs/cifsproto.h
@@ -154,9 +154,9 @@ extern int set_cifs_acl(struct cifs_ntsd *, __u32, struct inode *,
 extern void cifs_setup_cifs_sb(struct smb_vol *pvolume_info,
                               struct cifs_sb_info *cifs_sb);
 extern int cifs_match_super(struct super_block *, void *);
-extern void cifs_cleanup_volume_info(struct smb_vol **pvolume_info);
-extern int cifs_setup_volume_info(struct smb_vol **pvolume_info,
-                                 char *mount_data, const char *devname);
+extern void cifs_cleanup_volume_info(struct smb_vol *pvolume_info);
+extern struct smb_vol *cifs_get_volume_info(char *mount_data,
+                                           const char *devname);
 extern int cifs_mount(struct cifs_sb_info *, struct smb_vol *);
 extern void cifs_umount(struct cifs_sb_info *);
 extern void cifs_dfs_release_automount_timer(void);

diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index c8cb83e..dbd669c 100644 (file)
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -65,6 +65,8 @@ static int ip_connect(struct TCP_Server_Info *server);
 static int generic_ip_connect(struct TCP_Server_Info *server);
 static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink);
 static void cifs_prune_tlinks(struct work_struct *work);
+static int cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data,
+                                       const char *devname);
 
 /*
  * cifs tcp session reconnection
@@ -2240,8 +2242,8 @@ cifs_match_super(struct super_block *sb, void *data)
 
        rc = compare_mount_options(sb, mnt_data);
 out:
-       cifs_put_tlink(tlink);
        spin_unlock(&cifs_tcp_ses_lock);
+       cifs_put_tlink(tlink);
        return rc;
 }
 
@@ -2830,15 +2832,9 @@ is_path_accessible(int xid, struct cifs_tcon *tcon,
        return rc;
 }
 
-void
-cifs_cleanup_volume_info(struct smb_vol **pvolume_info)
+static void
+cleanup_volume_info_contents(struct smb_vol *volume_info)
 {
-       struct smb_vol *volume_info;
-
-       if (!pvolume_info || !*pvolume_info)
-               return;
-
-       volume_info = *pvolume_info;
        kfree(volume_info->username);
        kzfree(volume_info->password);
        kfree(volume_info->UNC);
@@ -2846,28 +2842,44 @@ cifs_cleanup_volume_info(struct smb_vol **pvolume_info)
        kfree(volume_info->domainname);
        kfree(volume_info->iocharset);
        kfree(volume_info->prepath);
+}
+
+void
+cifs_cleanup_volume_info(struct smb_vol *volume_info)
+{
+       if (!volume_info)
+               return;
+       cleanup_volume_info_contents(volume_info);
        kfree(volume_info);
-       *pvolume_info = NULL;
-       return;
 }
 
+
 #ifdef CONFIG_CIFS_DFS_UPCALL
 /* build_path_to_root returns full path to root when
  * we do not have an exiting connection (tcon) */
 static char *
-build_unc_path_to_root(const struct smb_vol *volume_info,
+build_unc_path_to_root(const struct smb_vol *vol,
                const struct cifs_sb_info *cifs_sb)
 {
-       char *full_path;
+       char *full_path, *pos;
+       unsigned int pplen = vol->prepath ? strlen(vol->prepath) : 0;
+       unsigned int unc_len = strnlen(vol->UNC, MAX_TREE_SIZE + 1);
 
-       int unc_len = strnlen(volume_info->UNC, MAX_TREE_SIZE + 1);
-       full_path = kmalloc(unc_len + 1, GFP_KERNEL);
+       full_path = kmalloc(unc_len + pplen + 1, GFP_KERNEL);
        if (full_path == NULL)
                return ERR_PTR(-ENOMEM);
 
-       strncpy(full_path, volume_info->UNC, unc_len);
-       full_path[unc_len] = 0; /* add trailing null */
+       strncpy(full_path, vol->UNC, unc_len);
+       pos = full_path + unc_len;
+
+       if (pplen) {
+               strncpy(pos, vol->prepath, pplen);
+               pos += pplen;
+       }
+
+       *pos = '\0'; /* add trailing null */
        convert_delimiter(full_path, CIFS_DIR_SEP(cifs_sb));
+       cFYI(1, "%s: full_path=%s", __func__, full_path);
        return full_path;
 }
 
@@ -2910,15 +2922,18 @@ expand_dfs_referral(int xid, struct cifs_ses *pSesInfo,
                                                   &fake_devname);
 
                free_dfs_info_array(referrals, num_referrals);
-               kfree(fake_devname);
-
-               if (cifs_sb->mountdata != NULL)
-                       kfree(cifs_sb->mountdata);
 
                if (IS_ERR(mdata)) {
                        rc = PTR_ERR(mdata);
                        mdata = NULL;
+               } else {
+                       cleanup_volume_info_contents(volume_info);
+                       memset(volume_info, '\0', sizeof(*volume_info));
+                       rc = cifs_setup_volume_info(volume_info, mdata,
+                                                       fake_devname);
                }
+               kfree(fake_devname);
+               kfree(cifs_sb->mountdata);
                cifs_sb->mountdata = mdata;
        }
        kfree(full_path);
@@ -2926,33 +2941,20 @@ expand_dfs_referral(int xid, struct cifs_ses *pSesInfo,
 }
 #endif
 
-int cifs_setup_volume_info(struct smb_vol **pvolume_info, char *mount_data,
-                          const char *devname)
+static int
+cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data,
+                       const char *devname)
 {
-       struct smb_vol *volume_info;
        int rc = 0;
 
-       *pvolume_info = NULL;
-
-       volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL);
-       if (!volume_info) {
-               rc = -ENOMEM;
-               goto out;
-       }
-
-       if (cifs_parse_mount_options(mount_data, devname,
-                                    volume_info)) {
-               rc = -EINVAL;
-               goto out;
-       }
+       if (cifs_parse_mount_options(mount_data, devname, volume_info))
+               return -EINVAL;
 
        if (volume_info->nullauth) {
                cFYI(1, "null user");
                volume_info->username = kzalloc(1, GFP_KERNEL);
-               if (volume_info->username == NULL) {
-                       rc = -ENOMEM;
-                       goto out;
-               }
+               if (volume_info->username == NULL)
+                       return -ENOMEM;
        } else if (volume_info->username) {
                /* BB fixme parse for domain name here */
                cFYI(1, "Username: %s", volume_info->username);
@@ -2960,8 +2962,7 @@ int cifs_setup_volume_info(struct smb_vol **pvolume_info, char *mount_data,
                cifserror("No username specified");
        /* In userspace mount helper we can get user name from alternate
           locations such as env variables and files on disk */
-               rc = -EINVAL;
-               goto out;
+               return -EINVAL;
        }
 
        /* this is needed for ASCII cp to Unicode converts */
@@ -2973,18 +2974,32 @@ int cifs_setup_volume_info(struct smb_vol **pvolume_info, char *mount_data,
                if (volume_info->local_nls == NULL) {
                        cERROR(1, "CIFS mount error: iocharset %s not found",
                                 volume_info->iocharset);
-                       rc = -ELIBACC;
-                       goto out;
+                       return -ELIBACC;
                }
        }
 
-       *pvolume_info = volume_info;
-       return rc;
-out:
-       cifs_cleanup_volume_info(&volume_info);
        return rc;
 }
 
+struct smb_vol *
+cifs_get_volume_info(char *mount_data, const char *devname)
+{
+       int rc;
+       struct smb_vol *volume_info;
+
+       volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL);
+       if (!volume_info)
+               return ERR_PTR(-ENOMEM);
+
+       rc = cifs_setup_volume_info(volume_info, mount_data, devname);
+       if (rc) {
+               cifs_cleanup_volume_info(volume_info);
+               volume_info = ERR_PTR(rc);
+       }
+
+       return volume_info;
+}
+
 int
 cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info)
 {
@@ -2997,6 +3012,7 @@ cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info)
        struct tcon_link *tlink;
 #ifdef CONFIG_CIFS_DFS_UPCALL
        int referral_walks_count = 0;
+#endif
 
        rc = bdi_setup_and_register(&cifs_sb->bdi, "cifs", BDI_CAP_MAP_COPY);
        if (rc)
@@ -3004,6 +3020,7 @@ cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *volume_info)
 
        cifs_sb->bdi.ra_pages = default_backing_dev_info.ra_pages;
 
+#ifdef CONFIG_CIFS_DFS_UPCALL
 try_mount_again:
        /* cleanup activities if we're chasing a referral */
        if (referral_walks_count) {
@@ -3012,7 +3029,6 @@ try_mount_again:
                else if (pSesInfo)
                        cifs_put_smb_ses(pSesInfo);
 
-               cifs_cleanup_volume_info(&volume_info);
                FreeXid(xid);
        }
 #endif