diff mbox

[v3] NFS: Don't zap caches on fallocate()

Message ID 1425571566-3117-1-git-send-email-Anna.Schumaker@Netapp.com (mailing list archive)
State New, archived
Headers show

Commit Message

Schumaker, Anna March 5, 2015, 4:06 p.m. UTC
This patch adds a GETATTR to the end of ALLOCATE and DEALLOCATE
operations so we can set the updated inode size and change attribute
directly.  DEALLOCATE will still need to release pagecache pages, so
nfs42_proc_deallocate() now calls truncate_pagecache_range() before
contacting the server.

Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
---
 fs/nfs/inode.c          |  1 -
 fs/nfs/nfs42proc.c      | 23 +++++++++++++++++++----
 fs/nfs/nfs42xdr.c       | 20 ++++++++++++++++----
 fs/nfs/nfs4file.c       |  1 -
 include/linux/nfs_xdr.h |  4 ++++
 5 files changed, 39 insertions(+), 10 deletions(-)

--
2.3.1



The information contained in this message and in any attachments is privileged and confidential, and may contain personal data. It is intended only for the use of the addressee. You should not read, copy, use, or disclose this information without authorisation. If you are not the intended recipient of this message, please e-mail the sender immediately and delete this message. Any unauthorised dissemination, disclosure, copying or use of the contents of this message is strictly prohibited and may result in legal action, including civil or criminal proceedings.

NetApp-Disclaimer-v1.1
--
To unsubscribe from this list: send the line "unsubscribe linux-nfs" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html

Comments

Trond Myklebust March 12, 2015, 3:57 p.m. UTC | #1
Hi Anna,

On Thu, 2015-03-05 at 11:06 -0500, Anna Schumaker wrote:
> This patch adds a GETATTR to the end of ALLOCATE and DEALLOCATE
> operations so we can set the updated inode size and change attribute
> directly.  DEALLOCATE will still need to release pagecache pages, so
> nfs42_proc_deallocate() now calls truncate_pagecache_range() before
> contacting the server.
> 
> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
> ---
>  fs/nfs/inode.c          |  1 -
>  fs/nfs/nfs42proc.c      | 23 +++++++++++++++++++----
>  fs/nfs/nfs42xdr.c       | 20 ++++++++++++++++----
>  fs/nfs/nfs4file.c       |  1 -
>  include/linux/nfs_xdr.h |  4 ++++
>  5 files changed, 39 insertions(+), 10 deletions(-)
> 
> diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
> index d42dff6..e92386f 100644
> --- a/fs/nfs/inode.c
> +++ b/fs/nfs/inode.c
> @@ -192,7 +192,6 @@ void nfs_zap_caches(struct inode *inode)
>         nfs_zap_caches_locked(inode);
>         spin_unlock(&inode->i_lock);
>  }
> -EXPORT_SYMBOL_GPL(nfs_zap_caches);

This patch appears to be completely whitespace-borked. Can you please
fix up your mailer and resend?

Thanks
  Trond
Schumaker, Anna March 16, 2015, 5:42 p.m. UTC | #2
On 03/12/2015 11:57 AM, Trond Myklebust wrote:
> Hi Anna,
> 
> On Thu, 2015-03-05 at 11:06 -0500, Anna Schumaker wrote:
>> This patch adds a GETATTR to the end of ALLOCATE and DEALLOCATE
>> operations so we can set the updated inode size and change attribute
>> directly.  DEALLOCATE will still need to release pagecache pages, so
>> nfs42_proc_deallocate() now calls truncate_pagecache_range() before
>> contacting the server.
>>
>> Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
>> ---
>>  fs/nfs/inode.c          |  1 -
>>  fs/nfs/nfs42proc.c      | 23 +++++++++++++++++++----
>>  fs/nfs/nfs42xdr.c       | 20 ++++++++++++++++----
>>  fs/nfs/nfs4file.c       |  1 -
>>  include/linux/nfs_xdr.h |  4 ++++
>>  5 files changed, 39 insertions(+), 10 deletions(-)
>>
>> diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
>> index d42dff6..e92386f 100644
>> --- a/fs/nfs/inode.c
>> +++ b/fs/nfs/inode.c
>> @@ -192,7 +192,6 @@ void nfs_zap_caches(struct inode *inode)
>>         nfs_zap_caches_locked(inode);
>>         spin_unlock(&inode->i_lock);
>>  }
>> -EXPORT_SYMBOL_GPL(nfs_zap_caches);
> 
> This patch appears to be completely whitespace-borked. Can you please
> fix up your mailer and resend?

I sent this with git, so I don't know what happened.  I'll resend soon!  (I'm tacking on an additional patch to reduce time spent under the i_mutex anyway)

Anna
> 
> Thanks
>   Trond
> 

--
To unsubscribe from this list: send the line "unsubscribe linux-nfs" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
diff mbox

Patch

diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index d42dff6..e92386f 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -192,7 +192,6 @@  void nfs_zap_caches(struct inode *inode)
        nfs_zap_caches_locked(inode);
        spin_unlock(&inode->i_lock);
 }
-EXPORT_SYMBOL_GPL(nfs_zap_caches);

 void nfs_zap_mapping(struct inode *inode, struct address_space *mapping)
 {
diff --git a/fs/nfs/nfs42proc.c b/fs/nfs/nfs42proc.c
index cb17072..b9aa6bb 100644
--- a/fs/nfs/nfs42proc.c
+++ b/fs/nfs/nfs42proc.c
@@ -36,13 +36,16 @@  static int _nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
                                 loff_t offset, loff_t len)
 {
        struct inode *inode = file_inode(filep);
+       struct nfs_server *server = NFS_SERVER(inode);
        struct nfs42_falloc_args args = {
                .falloc_fh      = NFS_FH(inode),
                .falloc_offset  = offset,
                .falloc_length  = len,
+               .falloc_bitmask = server->cache_consistency_bitmask,
+       };
+       struct nfs42_falloc_res res = {
+               .falloc_server  = server,
        };
-       struct nfs42_falloc_res res;
-       struct nfs_server *server = NFS_SERVER(inode);
        int status;

        msg->rpc_argp = &args;
@@ -52,8 +55,17 @@  static int _nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
        if (status)
                return status;

-       return nfs4_call_sync(server->client, server, msg,
-                             &args.seq_args, &res.seq_res, 0);
+       res.falloc_fattr = nfs_alloc_fattr();
+       if (!res.falloc_fattr)
+               return -ENOMEM;
+
+       status = nfs4_call_sync(server->client, server, msg,
+                               &args.seq_args, &res.seq_res, 0);
+       if (status == 0)
+               status = nfs_post_op_update_inode(inode, res.falloc_fattr);
+
+       kfree(res.falloc_fattr);
+       return status;
 }

 static int nfs42_proc_fallocate(struct rpc_message *msg, struct file *filep,
@@ -101,7 +113,10 @@  int nfs42_proc_deallocate(struct file *filep, loff_t offset, loff_t len)
        if (!nfs_server_capable(inode, NFS_CAP_DEALLOCATE))
                return -EOPNOTSUPP;

+       nfs_wb_all(inode);
        err = nfs42_proc_fallocate(&msg, filep, offset, len);
+       if (err == 0)
+               truncate_pagecache_range(inode, offset, (offset + len) -1);
        if (err == -EOPNOTSUPP)
                NFS_SERVER(inode)->caps &= ~NFS_CAP_DEALLOCATE;
        return err;
diff --git a/fs/nfs/nfs42xdr.c b/fs/nfs/nfs42xdr.c
index 038a7e1..1a25b27 100644
--- a/fs/nfs/nfs42xdr.c
+++ b/fs/nfs/nfs42xdr.c
@@ -25,16 +25,20 @@ 

 #define NFS4_enc_allocate_sz           (compound_encode_hdr_maxsz + \
                                         encode_putfh_maxsz + \
-                                        encode_allocate_maxsz)
+                                        encode_allocate_maxsz + \
+                                        encode_getattr_maxsz)
 #define NFS4_dec_allocate_sz           (compound_decode_hdr_maxsz + \
                                         decode_putfh_maxsz + \
-                                        decode_allocate_maxsz)
+                                        decode_allocate_maxsz + \
+                                        decode_getattr_maxsz)
 #define NFS4_enc_deallocate_sz         (compound_encode_hdr_maxsz + \
                                         encode_putfh_maxsz + \
-                                        encode_deallocate_maxsz)
+                                        encode_deallocate_maxsz + \
+                                        encode_getattr_maxsz)
 #define NFS4_dec_deallocate_sz         (compound_decode_hdr_maxsz + \
                                         decode_putfh_maxsz + \
-                                        decode_deallocate_maxsz)
+                                        decode_deallocate_maxsz + \
+                                        decode_getattr_maxsz)
 #define NFS4_enc_seek_sz               (compound_encode_hdr_maxsz + \
                                         encode_putfh_maxsz + \
                                         encode_seek_maxsz)
@@ -92,6 +96,7 @@  static void nfs4_xdr_enc_allocate(struct rpc_rqst *req,
        encode_sequence(xdr, &args->seq_args, &hdr);
        encode_putfh(xdr, args->falloc_fh, &hdr);
        encode_allocate(xdr, args, &hdr);
+       encode_getfattr(xdr, args->falloc_bitmask, &hdr);
        encode_nops(&hdr);
 }

@@ -110,6 +115,7 @@  static void nfs4_xdr_enc_deallocate(struct rpc_rqst *req,
        encode_sequence(xdr, &args->seq_args, &hdr);
        encode_putfh(xdr, args->falloc_fh, &hdr);
        encode_deallocate(xdr, args, &hdr);
+       encode_getfattr(xdr, args->falloc_bitmask, &hdr);
        encode_nops(&hdr);
 }

@@ -183,6 +189,9 @@  static int nfs4_xdr_dec_allocate(struct rpc_rqst *rqstp,
        if (status)
                goto out;
        status = decode_allocate(xdr, res);
+       if (status)
+               goto out;
+       decode_getfattr(xdr, res->falloc_fattr, res->falloc_server);
 out:
        return status;
 }
@@ -207,6 +216,9 @@  static int nfs4_xdr_dec_deallocate(struct rpc_rqst *rqstp,
        if (status)
                goto out;
        status = decode_deallocate(xdr, res);
+       if (status)
+               goto out;
+       decode_getfattr(xdr, res->falloc_fattr, res->falloc_server);
 out:
        return status;
 }
diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c
index 8b46389..d09c689 100644
--- a/fs/nfs/nfs4file.c
+++ b/fs/nfs/nfs4file.c
@@ -159,7 +159,6 @@  static long nfs42_fallocate(struct file *filep, int mode, loff_t offset, loff_t
                ret = nfs42_proc_allocate(filep, offset, len);
        mutex_unlock(&inode->i_mutex);

-       nfs_zap_caches(inode);
        return ret;
 }
 #endif /* CONFIG_NFS_V4_2 */
diff --git a/include/linux/nfs_xdr.h b/include/linux/nfs_xdr.h
index 4cb3eaa..38346b6 100644
--- a/include/linux/nfs_xdr.h
+++ b/include/linux/nfs_xdr.h
@@ -1271,11 +1271,15 @@  struct nfs42_falloc_args {
        nfs4_stateid                     falloc_stateid;
        u64                              falloc_offset;
        u64                              falloc_length;
+       const u32                       *falloc_bitmask;
 };

 struct nfs42_falloc_res {
        struct nfs4_sequence_res        seq_res;
        unsigned int                    status;
+
+       struct nfs_fattr                *falloc_fattr;
+       const struct nfs_server         *falloc_server;
 };

 struct nfs42_seek_args {