On Fri, 13 Jul 2012 11:53:27 +0400 Pavel Shilovsky <[email protected]> wrote:
> From: Pavel Shilovsky <[email protected]> > > Use SMB2 header size values for allocation and memset because they > are bigger and suitable for both CIFS and SMB2. > > Signed-off-by: Pavel Shilovsky <[email protected]> > --- > fs/cifs/cifsfs.c | 14 ++++++++++++-- > fs/cifs/misc.c | 25 +++++++++++++++++++------ > 2 files changed, 31 insertions(+), 8 deletions(-) > > diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c > index 8dc1492..5cf9299 100644 > --- a/fs/cifs/cifsfs.c > +++ b/fs/cifs/cifsfs.c > @@ -48,6 +48,9 @@ > #include <linux/key-type.h> > #include "cifs_spnego.h" > #include "fscache.h" > +#ifdef CONFIG_CIFS_SMB2 > +#include "smb2pdu.h" > +#endif > #define CIFS_MAGIC_NUMBER 0xFF534D42 /* the first four bytes of SMB PDUs */ > > int cifsFYI = 0; > @@ -981,6 +984,14 @@ cifs_destroy_inodecache(void) > static int > cifs_init_request_bufs(void) > { > + size_t max_hdr_size = MAX_CIFS_HDR_SIZE; > +#ifdef CONFIG_CIFS_SMB2 > + /* > + * SMB2 maximum header size is bigger than CIFS one - no problems to > + * allocate some more bytes for CIFS. > + */ > + max_hdr_size = MAX_SMB2_HDR_SIZE; > +#endif > if (CIFSMaxBufSize < 8192) { > /* Buffer size can not be smaller than 2 * PATH_MAX since maximum > Unicode path name has to fit in any SMB/CIFS path based frames */ > @@ -992,8 +1003,7 @@ cifs_init_request_bufs(void) > } > /* cERROR(1, "CIFSMaxBufSize %d 0x%x",CIFSMaxBufSize,CIFSMaxBufSize); */ > cifs_req_cachep = kmem_cache_create("cifs_request", > - CIFSMaxBufSize + > - MAX_CIFS_HDR_SIZE, 0, > + CIFSMaxBufSize + max_hdr_size, 0, > SLAB_HWCACHE_ALIGN, NULL); > if (cifs_req_cachep == NULL) > return -ENOMEM; > diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c > index 6460114..ad2538a 100644 > --- a/fs/cifs/misc.c > +++ b/fs/cifs/misc.c > @@ -29,6 +29,9 @@ > #include "smberr.h" > #include "nterr.h" > #include "cifs_unicode.h" > +#ifdef CONFIG_CIFS_SMB2 > +#include "smb2pdu.h" > +#endif > > extern mempool_t *cifs_sm_req_poolp; > extern mempool_t *cifs_req_poolp; > @@ -143,17 +146,27 @@ struct smb_hdr * > cifs_buf_get(void) > { > struct smb_hdr *ret_buf = NULL; > - > -/* We could use negotiated size instead of max_msgsize - > - but it may be more efficient to always alloc same size > - albeit slightly larger than necessary and maxbuffersize > - defaults to this and can not be bigger */ > + size_t buf_size = sizeof(struct smb_hdr); > + > +#ifdef CONFIG_CIFS_SMB2 > + /* > + * SMB2 header is bigger than CIFS one - no problems to clean some > + * more bytes for CIFS. > + */ > + buf_size = sizeof(struct smb2_hdr); > +#endif > + /* > + * We could use negotiated size instead of max_msgsize - > + * but it may be more efficient to always alloc same size > + * albeit slightly larger than necessary and maxbuffersize > + * defaults to this and can not be bigger. > + */ > ret_buf = mempool_alloc(cifs_req_poolp, GFP_NOFS); > > /* clear the first few header bytes */ > /* for most paths, more is cleared in header_assemble */ > if (ret_buf) { > - memset(ret_buf, 0, sizeof(struct smb_hdr) + 3); > + memset(ret_buf, 0, buf_size + 3); > atomic_inc(&bufAllocCount); > #ifdef CONFIG_CIFS_STATS2 > atomic_inc(&totBufAllocCount); Reviewed-by: Jeff Layton <[email protected]> -- To unsubscribe from this list: send the line "unsubscribe linux-cifs" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
