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authorSteven Danneman <steven.danneman@isilon.com>2009-01-26 20:14:32 -0800
committerSteven Danneman <steven.danneman@isilon.com>2009-02-09 23:56:17 -0800
commit11f60a62a1d7633e9a8ec62da18ed9ababa694df (patch)
treecbf46c95dd109ef73e08ef2fba676268dbaa5943 /source3/rpc_client
parent6272f4c2f453c509b8a3893d4c2ac5fc356b348d (diff)
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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.
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