[libvirt] [PATCH]: Allow arbitrary paths to virStorageVolLookupByPath

[Daniel P. Berrange]

On Mon, Nov 03, 2008 at 12:38:49PM +0100, Chris Lalancette wrote:
> Daniel P. Berrange wrote:
> 
> Oops, of course.  I've fixed this up and committed the result; the final patch
> is attached.
> 
> Thanks for the review,
> 
> -- 
> Chris Lalancette

> Index: src/storage_backend.c
> ===================================================================
> RCS file: /data/cvs/libvirt/src/storage_backend.c,v
> retrieving revision 1.24
> diff -u -r1.24 storage_backend.c
> --- src/storage_backend.c	28 Oct 2008 17:48:06 -0000	1.24
> +++ src/storage_backend.c	3 Nov 2008 11:32:15 -0000
> @@ -357,16 +357,17 @@
>  char *
>  virStorageBackendStablePath(virConnectPtr conn,
>                              virStoragePoolObjPtr pool,
> -                            char *devpath)
> +                            const char *devpath)
>  {
>      DIR *dh;
>      struct dirent *dent;
> +    char *stablepath;
>  
>      /* Short circuit if pool has no target, or if its /dev */
>      if (pool->def->target.path == NULL ||
>          STREQ(pool->def->target.path, "/dev") ||
>          STREQ(pool->def->target.path, "/dev/"))
> -        return devpath;
> +        goto ret_strdup;
>  
>      /* The pool is pointing somewhere like /dev/disk/by-path
>       * or /dev/disk/by-id, so we need to check all symlinks in
> @@ -382,7 +383,6 @@
>      }
>  
>      while ((dent = readdir(dh)) != NULL) {
> -        char *stablepath;
>          if (dent->d_name[0] == '.')
>              continue;
>  
> @@ -407,10 +407,17 @@
>  
>      closedir(dh);
>  
> + ret_strdup:
>      /* Couldn't find any matching stable link so give back
>       * the original non-stable dev path
>       */
> -    return devpath;
> +
> +    stablepath = strdup(devpath);
> +
> +    if (stablepath == NULL)
> +        virStorageReportError(conn, VIR_ERR_NO_MEMORY, "%s", _("dup path"));

Don't bother with passing a message with any VIR_ERR_NO_MEMORY
errors - just use NULL. The message is totally ignored for this
error code, and 'dup path' is useless info for the end user anyway

Daniel
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