| Revision | 63789b37d0e2344ca4da9d1c7dc49bae7368c466 (tree) |
|---|---|
| Zeit | 2005-06-08 01:26:54 |
| Autor | NeilBrown <neilb@cse....> |
| Commiter | Marcelo Tosatti |
[PATCH] Claim i_alloc_sem while changing file size in nfsd
nfsd should hold i_alloc_sem while calling notify_change
with ATTR_SIZE set, just like do_truncate does.
From: Oleg Drokin <green@linuxhacker.ru>
Signed-off-by: Neil Brown <neilb@cse.unsw.edu.au>
### Diffstat output
diff ./fs/nfsd/vfs.c~current~ ./fs/nfsd/vfs.c
fs/nfsd/vfs.c (diff)| @@ -301,6 +301,7 @@ nfsd_setattr(struct svc_rqst *rqstp, struct svc_fh *fhp, struct iattr *iap, | ||
| 301 | 301 | iap->ia_valid |= ATTR_CTIME; |
| 302 | 302 | |
| 303 | 303 | if (iap->ia_valid & ATTR_SIZE) { |
| 304 | + down_write(&inode->i_alloc_sem); | |
| 304 | 305 | fh_lock(fhp); |
| 305 | 306 | size_change = 1; |
| 306 | 307 | } |
| @@ -311,6 +312,7 @@ nfsd_setattr(struct svc_rqst *rqstp, struct svc_fh *fhp, struct iattr *iap, | ||
| 311 | 312 | } |
| 312 | 313 | if (size_change) { |
| 313 | 314 | fh_unlock(fhp); |
| 315 | + up_write(&inode->i_alloc_sem); | |
| 314 | 316 | put_write_access(inode); |
| 315 | 317 | } |
| 316 | 318 | if (!err) |
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