GFS2: Clean up gfs2_create

If we pass through knowledge of whether the creation is intended to be
exclusive or not, then we can deal with that in gfs2_create_inode
and remove one set of locking. Also this removes the loop in
gfs2_create and simplifies the code a bit.

Signed-off-by: Steven Whitehouse <swhiteho@redhat.com>

diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index a0b53d3..2af6905 100644 (file)
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -663,7 +663,7 @@ static int gfs2_security_init(struct gfs2_inode *dip, struct gfs2_inode *ip,
 
 static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
                             unsigned int mode, dev_t dev, const char *symname,
-                            unsigned int size)
+                            unsigned int size, int excl)
 {
        const struct qstr *name = &dentry->d_name;
        struct gfs2_holder ghs[2];
@@ -683,6 +683,12 @@ static int gfs2_create_inode(struct inode *dir, struct dentry *dentry,
                goto fail;
 
        error = create_ok(dip, name, mode);
+       if ((error == -EEXIST) && S_ISREG(mode) && !excl) {
+               inode = gfs2_lookupi(dir, &dentry->d_name, 0);
+               gfs2_glock_dq_uninit(ghs);
+               d_instantiate(dentry, inode);
+               return IS_ERR(inode) ? PTR_ERR(inode) : 0;
+       }
        if (error)
                goto fail_gunlock;
 
@@ -760,24 +766,10 @@ fail:
 static int gfs2_create(struct inode *dir, struct dentry *dentry,
                       int mode, struct nameidata *nd)
 {
-       struct inode *inode;
-       int ret;
-
-       for (;;) {
-               ret = gfs2_create_inode(dir, dentry, S_IFREG | mode, 0, NULL, 0);
-               if (ret != -EEXIST || (nd && (nd->flags & LOOKUP_EXCL)))
-                       return ret;
-
-               inode = gfs2_lookupi(dir, &dentry->d_name, 0);
-               if (inode) {
-                       if (!IS_ERR(inode))
-                               break;
-                       return PTR_ERR(inode);
-               }
-       }
-
-       d_instantiate(dentry, inode);
-       return 0;
+       int excl = 0;
+       if (nd && (nd->flags & LOOKUP_EXCL))
+               excl = 1;
+       return gfs2_create_inode(dir, dentry, S_IFREG | mode, 0, NULL, 0, excl);
 }
 
 /**
@@ -1135,7 +1127,7 @@ static int gfs2_symlink(struct inode *dir, struct dentry *dentry,
        if (size > sdp->sd_sb.sb_bsize - sizeof(struct gfs2_dinode) - 1)
                return -ENAMETOOLONG;
 
-       return gfs2_create_inode(dir, dentry, S_IFLNK | S_IRWXUGO, 0, symname, size);
+       return gfs2_create_inode(dir, dentry, S_IFLNK | S_IRWXUGO, 0, symname, size, 0);
 }
 
 /**
@@ -1149,7 +1141,7 @@ static int gfs2_symlink(struct inode *dir, struct dentry *dentry,
 
 static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, int mode)
 {
-       return gfs2_create_inode(dir, dentry, S_IFDIR | mode, 0, NULL, 0);
+       return gfs2_create_inode(dir, dentry, S_IFDIR | mode, 0, NULL, 0, 0);
 }
 
 /**
@@ -1164,7 +1156,7 @@ static int gfs2_mkdir(struct inode *dir, struct dentry *dentry, int mode)
 static int gfs2_mknod(struct inode *dir, struct dentry *dentry, int mode,
                      dev_t dev)
 {
-       return gfs2_create_inode(dir, dentry, mode, dev, NULL, 0);
+       return gfs2_create_inode(dir, dentry, mode, dev, NULL, 0, 0);
 }
 
 /*