diff options
Diffstat (limited to 'fs/coda/upcall.c')
| -rw-r--r-- | fs/coda/upcall.c | 34 |
1 files changed, 33 insertions, 1 deletions
diff --git a/fs/coda/upcall.c b/fs/coda/upcall.c index 1175a1722411..cf1e662681a5 100644 --- a/fs/coda/upcall.c +++ b/fs/coda/upcall.c @@ -804,12 +804,44 @@ exit: * * CODA_REPLACE -- replace one CodaFid with another throughout the name cache */ -int coda_downcall(struct venus_comm *vcp, int opcode, union outputArgs *out) +int coda_downcall(struct venus_comm *vcp, int opcode, union outputArgs *out, + size_t nbytes) { struct inode *inode = NULL; struct CodaFid *fid = NULL, *newfid; struct super_block *sb; + /* + * Make sure we have received enough data from the cache + * manager to populate the necessary fields in the buffer + */ + switch (opcode) { + case CODA_PURGEUSER: + if (nbytes < sizeof(struct coda_purgeuser_out)) + return -EINVAL; + break; + + case CODA_ZAPDIR: + if (nbytes < sizeof(struct coda_zapdir_out)) + return -EINVAL; + break; + + case CODA_ZAPFILE: + if (nbytes < sizeof(struct coda_zapfile_out)) + return -EINVAL; + break; + + case CODA_PURGEFID: + if (nbytes < sizeof(struct coda_purgefid_out)) + return -EINVAL; + break; + + case CODA_REPLACE: + if (nbytes < sizeof(struct coda_replace_out)) + return -EINVAL; + break; + } + /* Handle invalidation requests. */ mutex_lock(&vcp->vc_mutex); sb = vcp->vc_sb; |