| commit | 11f60a62a1d7633e9a8ec62da18ed9ababa694df | |
| author | Steven Danneman <steven.danneman@isilon.com> | |
| Tue, 27 Jan 2009 04:14:32 +0000 (26 20:14 -0800) | ||
| committer | Steven Danneman <steven.danneman@isilon.com> | |
| Tue, 10 Feb 2009 07:56:17 +0000 (9 23:56 -0800) | ||
| tree | cbf46c95dd109ef73e08ef2fba676268dbaa5943 | treesnapshot (tar.gz zip) |
| parent | 6272f4c2f453c509b8a3893d4c2ac5fc356b348d | commitdiff |
s3: OneFS bulk directory enumeration support
OneFS provides the bulk directory enumeration syscall readdirplus(). This
syscall has the same semantics as the NFSv3 READDIRPLUS command, returning
a batch of directory entries with prefetched stat information via one
syscall.
This commit wraps the readdirplus() call in the existing POSIX
readdir/seekdir VFS interface. By default a batch of 128 directory entries
are optimistically read from the kernel into a global cache, and fed to
iterative calls of VFS_OP_READDIR.
The global buffers could be avoided in the future by hanging connection
specific buffers off the conn struct.
Added new parameter "onefs:use readdirplus" which toggles usage of this
code on or off.
OneFS provides the bulk directory enumeration syscall readdirplus(). This
syscall has the same semantics as the NFSv3 READDIRPLUS command, returning
a batch of directory entries with prefetched stat information via one
syscall.
This commit wraps the readdirplus() call in the existing POSIX
readdir/seekdir VFS interface. By default a batch of 128 directory entries
are optimistically read from the kernel into a global cache, and fed to
iterative calls of VFS_OP_READDIR.
The global buffers could be avoided in the future by hanging connection
specific buffers off the conn struct.
Added new parameter "onefs:use readdirplus" which toggles usage of this
code on or off.