From 624bd5b7b683c978c6d5f4e9f6142cfb3470983d Mon Sep 17 00:00:00 2001 From: Anna Schumaker Date: Tue, 25 Nov 2014 13:18:16 -0500 Subject: nfs: Add DEALLOCATE support This patch adds support for using the NFS v4.2 operation DEALLOCATE to punch holes in a file. Signed-off-by: Anna Schumaker Signed-off-by: Trond Myklebust --- fs/nfs/nfs42proc.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+) (limited to 'fs/nfs/nfs42proc.c') diff --git a/fs/nfs/nfs42proc.c b/fs/nfs/nfs42proc.c index 581f34e9d8a0..cb170722769c 100644 --- a/fs/nfs/nfs42proc.c +++ b/fs/nfs/nfs42proc.c @@ -90,6 +90,23 @@ int nfs42_proc_allocate(struct file *filep, loff_t offset, loff_t len) return err; } +int nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len) +{ + struct rpc_message msg = { + .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DEALLOCATE], + }; + struct inode *inode = file_inode(filep); + int err; + + if (!nfs_server_capable(inode, NFS_CAP_DEALLOCATE)) + return -EOPNOTSUPP; + + err = nfs42_proc_fallocate(&msg, filep, offset, len); + if (err == -EOPNOTSUPP) + NFS_SERVER(inode)->caps &= ~NFS_CAP_DEALLOCATE; + return err; +} + loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence) { struct inode *inode = file_inode(filep); -- cgit v1.2.3