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vol_split: avoid using stale open directory vnodes

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we could in case of multiple splits end up using a stale open
vnode for a directory; attempt to close and thus force-reopen
any fdhandles backing ihandles.

Change-Id: I50ff39873b523b05287c7a183d84e6f16eb7cd90
Reviewed-on: http://gerrit.openafs.org/5553
Reviewed-by: Hartmut Reuter <reuter@rzg.mpg.de>
Tested-by: Derrick Brashear <shadow@dementix.org>
Reviewed-by: Derrick Brashear <shadow@dementix.org>
This commit is contained in:
Hartmut Reuter 2011-10-05 10:06:05 -04:00 committed by Derrick Brashear
parent 4a1d319177
commit 3df03f0abe
1 changed files with 17 additions and 1 deletions
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18
src/volser/vol_split.c
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@ -247,6 +247,15 @@ copyDir(struct Msg *m, IHandle_t *inh, IHandle_t *outh)
return EIO;
}
outfdP = IH_OPEN(outh);
/*
* In case that a file with the same (NAMEI) name existed before and is still
* open outfdP may point to the wrong (unlinked) file. To make sure we write
* into the correct file it's safer to 1st FDH_REALLYCLOSE it and then to
* re-open it.
*/
if (outfdP)
FDH_REALLYCLOSE(outfdP);
outfdP = IH_OPEN(outh);
if (!outfdP) {
sprintf(m->line, "Couldn't open output directory %u.%u.%u\n",
outfdP->fd_ih->ih_vid,
@ -496,7 +505,7 @@ createMountpoint(Volume *vol, Volume *newvol, struct VnodeDiskObject *parent,
afs_int32 code;
Inode ino, newino;
DirHandle dir;
IHandle_t *h;
IHandle_t *h, *hp;
struct VnodeDiskObject vnode;
FdHandle_t *fdP, *fdP2;
afs_uint64 size;
@ -605,6 +614,13 @@ createMountpoint(Volume *vol, Volume *newvol, struct VnodeDiskObject *parent,
code = afs_dir_Create(&dir, name, &fid);
FidZap(&dir);
/* Make sure the directory file doesn't remain open */
IH_INIT(hp, V_device(vol), V_parentId(vol), ino);
fdP = IH_OPEN(hp);
if (fdP)
FDH_REALLYCLOSE(fdP);
IH_RELEASE(hp);
class = vLarge;
vcp = &VnodeClassInfo[class];
fdP = IH_OPEN(vol->vnodeIndex[class].handle);