getattrlistbulk() works on all file systems. If the file system supports bulk enumeration natively, great! If it does not, then the kernel code takes care of it. In addition, getattrlistbulk() supports all non-volume attributes (getattrlistbulk only supported a large subset).
The API calling convention for getattrlistbulk() is slightly different than getattrlistbulk() — read the man page carefully. In particular: • ATTR_CMN_NAME and ATTR_CMN_RETURNED_ATTRS are required (requiring ATTR_CMN_NAME allowed us to get rid of the newState argument). • A new attribute, ATTR_CMN_ERROR, can be requested to detect error conditions for a specific directory entry. • The method for determining when enumeration is complete is different. You just keep calling getattrlistbulk() until 0 entries are returned. - Jim > On Jan 11, 2015, at 9:31 PM, James Bucanek <subscri...@gloaming.com> wrote: > > Eric, > > I would just like to clarify: the new getattrlistbulk() function works on all > filesystem. We don't have to check the volume's VOL_CAP_INT_READDIRATTR > capability before calling it, correct? > > James Bucanek > >> Eric Tamura <mailto:etam...@apple.com> December 10, 2014 at 5:57 PM >> It should be much faster. >> >> Also note that as of Yosemite, we have added a new API: getattrlistbulk(2), >> which is like getdirentriesattr(), but supported in VFS for all filesystems. >> getdirentriesattr() is now deprecated. >> >> The main advantage of the bulk call is that we can return results in most >> cases without having to create a vnode in-kernel, which saves on I/O: HFS+ >> on-disk layout is such that all of the directory entries in a given >> directory are clustered together and we can get multiple directory entries >> from the same cached on-disk blocks. >> > _______________________________________________ > Do not post admin requests to the list. They will be ignored. > Filesystem-dev mailing list (Filesystememail@example.com) > Help/Unsubscribe/Update your Subscription: > https://lists.apple.com/mailman/options/filesystem-dev/luther.j%40apple.com > > This email sent to luthe...@apple.com
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