[CIFS] fix build error

[platform/kernel/linux-starfive.git] / fs / cifs / connect.c

diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 005df85..cd4ccc8 100644 (file)
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -95,6 +95,7 @@ struct smb_vol {
        bool local_lease:1; /* check leases only on local system, not remote */
        bool noblocksnd:1;
        bool noautotune:1;
+       bool nostrictsync:1; /* do not force expensive SMBflush on every sync */
        unsigned int rsize;
        unsigned int wsize;
        unsigned int sockopt;
@@ -1274,6 +1275,10 @@ cifs_parse_mount_options(char *options, const char *devname,
                        vol->intr = 0;
                } else if (strnicmp(data, "intr", 4) == 0) {
                        vol->intr = 1;
+               } else if (strnicmp(data, "nostrictsync", 12) == 0) {
+                       vol->nostrictsync = 1;
+               } else if (strnicmp(data, "strictsync", 10) == 0) {
+                       vol->nostrictsync = 0;
                } else if (strnicmp(data, "serverino", 7) == 0) {
                        vol->server_ino = 1;
                } else if (strnicmp(data, "noserverino", 9) == 0) {
@@ -2160,6 +2165,8 @@ static void setup_cifs_sb(struct smb_vol *pvolume_info,
                cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL;
        if (pvolume_info->nobrl)
                cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL;
+       if (pvolume_info->nostrictsync)
+               cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC;
        if (pvolume_info->mand_lock)
                cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL;
        if (pvolume_info->cifs_acl)
@@ -2180,6 +2187,33 @@ static void setup_cifs_sb(struct smb_vol *pvolume_info,
                           "mount option supported"));
 }
 
+static int
+is_path_accessible(int xid, struct cifsTconInfo *tcon,
+                  struct cifs_sb_info *cifs_sb, const char *full_path)
+{
+       int rc;
+       __u64 inode_num;
+       FILE_ALL_INFO *pfile_info;
+
+       rc = CIFSGetSrvInodeNumber(xid, tcon, full_path, &inode_num,
+                                  cifs_sb->local_nls,
+                                  cifs_sb->mnt_cifs_flags &
+                                               CIFS_MOUNT_MAP_SPECIAL_CHR);
+       if (rc != -EOPNOTSUPP)
+               return rc;
+
+       pfile_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
+       if (pfile_info == NULL)
+               return -ENOMEM;
+
+       rc = CIFSSMBQPathInfo(xid, tcon, full_path, pfile_info,
+                             0 /* not legacy */, cifs_sb->local_nls,
+                             cifs_sb->mnt_cifs_flags &
+                               CIFS_MOUNT_MAP_SPECIAL_CHR);
+       kfree(pfile_info);
+       return rc;
+}
+
 int
 cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
           char *mount_data, const char *devname)
@@ -2190,6 +2224,7 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
        struct cifsSesInfo *pSesInfo = NULL;
        struct cifsTconInfo *tcon = NULL;
        struct TCP_Server_Info *srvTcp = NULL;
+       char   *full_path;
 
        xid = GetXid();
 
@@ -2426,6 +2461,23 @@ mount_fail_check:
                cifs_sb->rsize = min(cifs_sb->rsize,
                               (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE));
 
+       if (!rc && cifs_sb->prepathlen) {
+               /* build_path_to_root works only when we have a valid tcon */
+               full_path = cifs_build_path_to_root(cifs_sb);
+               if (full_path == NULL) {
+                       rc = -ENOMEM;
+                       goto mount_fail_check;
+               }
+               rc = is_path_accessible(xid, tcon, cifs_sb, full_path);
+               if (rc) {
+                       cERROR(1, ("Path %s in not accessible: %d",
+                                               full_path, rc));
+                       kfree(full_path);
+                       goto mount_fail_check;
+               }
+               kfree(full_path);
+       }
+
        /* volume_info->password is freed above when existing session found
        (in which case it is not needed anymore) but when new sesion is created
        the password ptr is put in the new session structure (in which case the