[SOUP] Use xattrs to get/set the creation time of disk cache files

• Component: WebKit2
• Status: RESOLVED FIXED

[Carlos Garcia Campos]

The network process disk cache uses the creation time to compute a worth value used to determine the order in which cached resources are deleted when the cache is shrunk. In some operating systems like Linux there's no st_birthtime in struct stat, but since cache files are always created and deleted by us, we could use a custom xattr to store and retrieve the creation time of cached resources.

[Carlos Garcia Campos]

Created attachment 251727 [details]
Patch

[Martin Robinson]

Comment on attachment 251727 [details]
Patch

View in context: https://bugs.webkit.org/attachment.cgi?id=251727&action=review

> Source/WebKit2/NetworkProcess/cache/NetworkCacheFileSystemPosix.h:86
> +#if USE(SOUP)

The correct guard here is probably #elif USE(SOUP) && OS(LINUX) unless g_file_query allows xattrs to work properly on Windows.

[Carlos Garcia Campos]

(In reply to comment #2)
> Comment on attachment 251727 [details]
> Patch

Thanks for the review.

> View in context:
> https://bugs.webkit.org/attachment.cgi?id=251727&action=review
> 
> > Source/WebKit2/NetworkProcess/cache/NetworkCacheFileSystemPosix.h:86
> > +#if USE(SOUP)
> 
> The correct guard here is probably #elif USE(SOUP) && OS(LINUX) unless
> g_file_query allows xattrs to work properly on Windows.

This is in a file called NetworkCacheFileSystemPosix.h in WebKit2 subdir, so no windows support at all.

[Carlos Garcia Campos]

Committed r183532: <http://trac.webkit.org/changeset/183532>