9p: define session flags

Create more general flags field in the v9fs_session_info struct and move the
'extended' flag as a bit in the flags.

Signed-off-by: Latchesar Ionkov <lucho@ionkov.net>
Signed-off-by: Eric Van Hensbergen <ericvh@gmail.com>

3 files changed, 27 insertions, 17 deletions

diff --git a/fs/9p/v9fs.c b/fs/9p/v9fs.c
index 08d880fb5b6a..8ac246700b70 100644
--- a/fs/9p/v9fs.c
+++ b/fs/9p/v9fs.c
@@ -128,7 +128,7 @@ static void v9fs_parse_options(struct v9fs_session_info *v9ses)
 
         /* setup defaults */
         v9ses->maxdata = 8192;
-        v9ses->extended = 1;
+        v9ses->flags = V9FS_EXTENDED;
         v9ses->afid = ~0;
         v9ses->debug = 0;
         v9ses->cache = 0;
@@ -178,7 +178,7 @@ static void v9fs_parse_options(struct v9fs_session_info *v9ses)
                         match_strcpy(v9ses->remotename, &args[0]);
                         break;
                 case Opt_legacy:
-                        v9ses->extended = 0;
+                        v9ses->flags &= ~V9FS_EXTENDED;
                         break;
                 case Opt_nodevmap:
                         v9ses->nodev = 1;
@@ -244,7 +244,7 @@ struct p9_fid *v9fs_session_init(struct v9fs_session_info *v9ses,
                 v9ses->maxdata = v9ses->trans->maxsize-P9_IOHDRSZ;
 
         v9ses->clnt = p9_client_create(trans, v9ses->maxdata+P9_IOHDRSZ,
-                v9ses->extended);
+                v9fs_extended(v9ses));
 
         if (IS_ERR(v9ses->clnt)) {
                 retval = PTR_ERR(v9ses->clnt);
diff --git a/fs/9p/v9fs.h b/fs/9p/v9fs.h
index 7eb135cf60ca..804b3ef8feab 100644
--- a/fs/9p/v9fs.h
+++ b/fs/9p/v9fs.h
@@ -29,7 +29,7 @@
 struct v9fs_session_info {
         /* options */
         unsigned int maxdata;
-        unsigned char extended; /* set to 1 if we are using UNIX extensions */
+        unsigned char flags;    /* session flags */
         unsigned char nodev;    /* set to 1 if no disable device mapping */
         unsigned short debug;   /* debug level */
         unsigned int afid;      /* authentication fid */
@@ -45,6 +45,11 @@ struct v9fs_session_info {
         struct dentry *debugfs_dir;
 };
 
+/* session flags */
+enum {
+        V9FS_EXTENDED,
+};
+
 /* possible values of ->cache */
 /* eventually support loose, tight, time, session, default always none */
 enum {
@@ -70,3 +75,8 @@ static inline struct v9fs_session_info *v9fs_inode2v9ses(struct inode *inode)
 {
         return (inode->i_sb->s_fs_info);
 }
+
+static inline int v9fs_extended(struct v9fs_session_info *v9ses)
+{
+        return v9ses->flags & V9FS_EXTENDED;
+}
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index e5c45eed58a9..2270d06ccd56 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -59,7 +59,7 @@ static int unixmode2p9mode(struct v9fs_session_info *v9ses, int mode)
         res = mode & 0777;
         if (S_ISDIR(mode))
                 res |= P9_DMDIR;
-        if (v9ses->extended) {
+        if (v9fs_extended(v9ses)) {
                 if (S_ISLNK(mode))
                         res |= P9_DMSYMLINK;
                 if (v9ses->nodev == 0) {
@@ -99,21 +99,21 @@ static int p9mode2unixmode(struct v9fs_session_info *v9ses, int mode)
 
         if ((mode & P9_DMDIR) == P9_DMDIR)
                 res |= S_IFDIR;
-        else if ((mode & P9_DMSYMLINK) && (v9ses->extended))
+        else if ((mode & P9_DMSYMLINK) && (v9fs_extended(v9ses)))
                 res |= S_IFLNK;
-        else if ((mode & P9_DMSOCKET) && (v9ses->extended)
+        else if ((mode & P9_DMSOCKET) && (v9fs_extended(v9ses))
                  && (v9ses->nodev == 0))
                 res |= S_IFSOCK;
-        else if ((mode & P9_DMNAMEDPIPE) && (v9ses->extended)
+        else if ((mode & P9_DMNAMEDPIPE) && (v9fs_extended(v9ses))
                  && (v9ses->nodev == 0))
                 res |= S_IFIFO;
-        else if ((mode & P9_DMDEVICE) && (v9ses->extended)
+        else if ((mode & P9_DMDEVICE) && (v9fs_extended(v9ses))
                  && (v9ses->nodev == 0))
                 res |= S_IFBLK;
         else
                 res |= S_IFREG;
 
-        if (v9ses->extended) {
+        if (v9fs_extended(v9ses)) {
                 if ((mode & P9_DMSETUID) == P9_DMSETUID)
                         res |= S_ISUID;
 
@@ -214,7 +214,7 @@ struct inode *v9fs_get_inode(struct super_block *sb, int mode)
                 case S_IFBLK:
                 case S_IFCHR:
                 case S_IFSOCK:
-                        if(!v9ses->extended) {
+                        if (!v9fs_extended(v9ses)) {
                                 P9_DPRINTK(P9_DEBUG_ERROR,
                                       "special files without extended mode\n");
                                 return ERR_PTR(-EINVAL);
@@ -227,7 +227,7 @@ struct inode *v9fs_get_inode(struct super_block *sb, int mode)
                         inode->i_fop = &v9fs_file_operations;
                         break;
                 case S_IFLNK:
-                        if(!v9ses->extended) {
+                        if (!v9fs_extended(v9ses)) {
                                 P9_DPRINTK(P9_DEBUG_ERROR,
                                         "extended modes used w/o 9P2000.u\n");
                                 return ERR_PTR(-EINVAL);
@@ -236,7 +236,7 @@ struct inode *v9fs_get_inode(struct super_block *sb, int mode)
                         break;
                 case S_IFDIR:
                         inc_nlink(inode);
-                        if(v9ses->extended)
+                        if (v9fs_extended(v9ses))
                                 inode->i_op = &v9fs_dir_inode_operations_ext;
                         else
                                 inode->i_op = &v9fs_dir_inode_operations;
@@ -768,7 +768,7 @@ static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr)
         if (iattr->ia_valid & ATTR_SIZE)
                 wstat.length = iattr->ia_size;
 
-        if (v9ses->extended) {
+        if (v9fs_extended(v9ses)) {
                 if (iattr->ia_valid & ATTR_UID)
                         wstat.n_uid = iattr->ia_uid;
 
@@ -808,7 +808,7 @@ v9fs_stat2inode(struct p9_stat *stat, struct inode *inode,
         inode->i_uid = v9ses->uid;
         inode->i_gid = v9ses->gid;
 
-        if (v9ses->extended) {
+        if (v9fs_extended(v9ses)) {
                 inode->i_uid = stat->n_uid;
                 inode->i_gid = stat->n_gid;
         }
@@ -890,7 +890,7 @@ static int v9fs_readlink(struct dentry *dentry, char *buffer, int buflen)
         if(IS_ERR(fid))
                 return PTR_ERR(fid);
 
-        if (!v9ses->extended)
+        if (!v9fs_extended(v9ses))
                 return -EBADF;
 
         st = p9_client_stat(fid);
@@ -1011,7 +1011,7 @@ static int v9fs_vfs_mkspecial(struct inode *dir, struct dentry *dentry,
         struct p9_fid *fid;
 
         v9ses = v9fs_inode2v9ses(dir);
-        if (!v9ses->extended) {
+        if (!v9fs_extended(v9ses)) {
                 P9_DPRINTK(P9_DEBUG_ERROR, "not extended\n");
                 return -EPERM;
         }