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NFSv4.2: handle NFS-specific llseek errors 

Handle NFS-specific llseek errors instead of letting them leak out to
userspace.

Reported-by: Benjamin Coddington <bcodding@redhat.com>
Signed-off-by: J. Bruce Fields <bfields@redhat.com>
Signed-off-by: Trond Myklebust <trond.myklebust@primarydata.com>
This commit is contained in:
J. Bruce Fields 2015-07-23 11:08:43 -04:00 committed by Trond Myklebust
parent d4c30454db
commit bdcc2cd14e
1 changed files with 18 additions and 1 deletions
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19
fs/nfs/nfs42proc.c
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@ -135,7 +135,7 @@ int nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len)
return err; return err;
} }
loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence) static loff_t _nfs42_proc_llseek(struct file *filep, loff_t offset, int whence)
{ {
struct inode *inode = file_inode(filep); struct inode *inode = file_inode(filep);
struct nfs42_seek_args args = { struct nfs42_seek_args args = {
@ -171,6 +171,23 @@ loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence)
return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes); return vfs_setpos(filep, res.sr_offset, inode->i_sb->s_maxbytes);
} }
loff_t nfs42_proc_llseek(struct file *filep, loff_t offset, int whence)
{
struct nfs_server *server = NFS_SERVER(file_inode(filep));
struct nfs4_exception exception = { };
int err;
do {
err = _nfs42_proc_llseek(filep, offset, whence);
if (err == -ENOTSUPP)
return -EOPNOTSUPP;
err = nfs4_handle_exception(server, err, &exception);
} while (exception.retry);
return err;
}
static void static void
nfs42_layoutstat_prepare(struct rpc_task *task, void *calldata) nfs42_layoutstat_prepare(struct rpc_task *task, void *calldata)
{ {