projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 1c6dcbe5 AS |
1 | /* |
| 2 | * Copyright (c) 2014 Anna Schumaker <Anna.Schumaker@Netapp.com> | |
| 3 | */ | |
| 4 | #include <linux/fs.h> | |
| 5 | #include <linux/sunrpc/sched.h> | |
| 6 | #include <linux/nfs.h> | |
| 7 | #include <linux/nfs3.h> | |
| 8 | #include <linux/nfs4.h> | |
| 9 | #include <linux/nfs_xdr.h> | |
| 10 | #include <linux/nfs_fs.h> | |
| 11 | #include "nfs4_fs.h" | |
| 12 | #include "nfs42.h" | |
| 13 | ||
| 14 | static int nfs42_set_rw_stateid(nfs4_stateid *dst, struct file *file, | |
| 15 | fmode_t fmode) | |
| 16 | { | |
| 17 | struct nfs_open_context *open; | |
| 18 | struct nfs_lock_context *lock; | |
| 19 | int ret; | |
| 20 | ||
| 21 | open = get_nfs_open_context(nfs_file_open_context(file)); | |
| 22 | lock = nfs_get_lock_context(open); | |
| 23 | if (IS_ERR(lock)) { | |
| 24 | put_nfs_open_context(open); | |
| 25 | return PTR_ERR(lock); | |
| 26 | } | |
| 27 | ||
| 28 | ret = nfs4_set_rw_stateid(dst, open, lock, fmode); | |
| 29 | ||
| 30 | nfs_put_lock_context(lock); | |
| 31 | put_nfs_open_context(open); | |
| 32 | return ret; | |
| 33 | } | |
| 34 | ||
| 35 | loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence) | |
| 36 | { | |
| 37 | struct inode *inode = file_inode(filep); | |
| 38 | struct nfs42_seek_args args = { | |
| 39 | .sa_fh = NFS_FH(inode), | |
| 40 | .sa_offset = offset, | |
| 41 | .sa_what = (whence == SEEK_HOLE) ? | |
| 42 | NFS4_CONTENT_HOLE : NFS4_CONTENT_DATA, | |
| 43 | }; | |
| 44 | struct nfs42_seek_res res; | |
| 45 | struct rpc_message msg = { | |
| 46 | .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEEK], | |
| 47 | .rpc_argp = &args, | |
| 48 | .rpc_resp = &res, | |
| 49 | }; | |
| 50 | struct nfs_server *server = NFS_SERVER(inode); | |
| 51 | int status; | |
| 52 | ||
| 878ffa9f | 53 | if (!nfs_server_capable(inode, NFS_CAP_SEEK)) |
| 1c6dcbe5 AS |
54 | return -ENOTSUPP; |
| 55 | ||
| 56 | status = nfs42_set_rw_stateid(&args.sa_stateid, filep, FMODE_READ); | |
| 57 | if (status) | |
| 58 | return status; | |
| 59 | ||
| 60 | nfs_wb_all(inode); | |
| 61 | status = nfs4_call_sync(server->client, server, &msg, | |
| 62 | &args.seq_args, &res.seq_res, 0); | |
| 63 | if (status == -ENOTSUPP) | |
| 64 | server->caps &= ~NFS_CAP_SEEK; | |
| 65 | if (status) | |
| 66 | return status; | |
| 67 | ||
| 68 | return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes); | |
| 69 | } |