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cifs: fix incorrect handling of smb2_set_sparse() return in smb3_simple_falloc 

smb2_set_sparse does not return -errno, it returns a boolean where
true means success.
Change this to just ignore the return value just like the other callsites.

Additionally add code to handle the case where we must set the file sparse
and possibly also extending it.

Fixes xfstests: generic/236 generic/350 generic/420

Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
This commit is contained in:
Ronnie Sahlberg 2019-03-15 00:08:48 +10:00 committed by Steve French
parent dd0ac2d24b
commit f16994797e
1 changed files with 12 additions and 2 deletions
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14
fs/cifs/smb2ops.c
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@ -2718,6 +2718,7 @@ static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
struct cifsFileInfo *cfile = file->private_data;
long rc = -EOPNOTSUPP;
unsigned int xid;
__le64 eof;
xid = get_xid();
@ -2777,9 +2778,18 @@ static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
return rc;
}
rc = smb2_set_sparse(xid, tcon, cfile, inode, false);
smb2_set_sparse(xid, tcon, cfile, inode, false);
rc = 0;
} else {
smb2_set_sparse(xid, tcon, cfile, inode, false);
rc = 0;
if (i_size_read(inode) < off + len) {
eof = cpu_to_le64(off + len);
rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
cfile->fid.volatile_fid, cfile->pid,
&eof);
}
}
/* BB: else ... in future add code to extend file and set sparse */
if (rc)
trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,