diff options
| author | Pavel Shilovsky <pshilov@microsoft.com> | 2019-01-16 11:12:41 -0800 |
|---|---|---|
| committer | Steve French <stfrench@microsoft.com> | 2019-03-05 18:10:01 -0600 |
| commit | 335b7b62ffb69d18055f2bb6f3a029263a07c735 (patch) | |
| tree | 27d3e4a9edd427da8e4bae69a4e54b37c89d661a /fs/cifs/cifsglob.h | |
| parent | 5b964852609b2826126a526851f316fc06f5e37e (diff) | |
| download | linux-335b7b62ffb69d18055f2bb6f3a029263a07c735.tar.bz2 | |
CIFS: Respect reconnect in MTU credits calculations
Every time after a session reconnect we don't need to account for
credits obtained in previous sessions. Introduce new struct cifs_credits
which contains both credits value and reconnect instance of the
time those credits were taken. Modify a routine that add credits
back to handle the reconnect instance by assuming zero credits
if the reconnect happened after the credits were obtained and
before we decided to add them back due to some errors during sending.
This patch fixes the MTU credits cases. The subsequent patch
will handle non-MTU ones.
Signed-off-by: Pavel Shilovsky <pshilov@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs/cifs/cifsglob.h')
| -rw-r--r-- | fs/cifs/cifsglob.h | 29 |
1 files changed, 19 insertions, 10 deletions
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index 0c796a27d1eb..4293b1f13f00 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -216,6 +216,7 @@ struct cifs_io_parms; struct cifs_search_info; struct cifsInodeInfo; struct cifs_open_parms; +struct cifs_credits; struct smb_version_operations { int (*send_cancel)(struct TCP_Server_Info *, struct smb_rqst *, @@ -230,8 +231,9 @@ struct smb_version_operations { /* check response: verify signature, map error */ int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *, bool); - void (*add_credits)(struct TCP_Server_Info *, const unsigned int, - const int); + void (*add_credits)(struct TCP_Server_Info *server, + const struct cifs_credits *credits, + const int optype); void (*set_credits)(struct TCP_Server_Info *, const int); int * (*get_credits_field)(struct TCP_Server_Info *, const int); unsigned int (*get_credits)(struct mid_q_entry *); @@ -454,7 +456,7 @@ struct smb_version_operations { unsigned int (*wp_retry_size)(struct inode *); /* get mtu credits */ int (*wait_mtu_credits)(struct TCP_Server_Info *, unsigned int, - unsigned int *, unsigned int *); + unsigned int *, struct cifs_credits *); /* check if we need to issue closedir */ bool (*dir_needs_close)(struct cifsFileInfo *); long (*fallocate)(struct file *, struct cifs_tcon *, int, loff_t, @@ -713,6 +715,11 @@ struct TCP_Server_Info { int nr_targets; }; +struct cifs_credits { + unsigned int value; + unsigned int instance; +}; + static inline unsigned int in_flight(struct TCP_Server_Info *server) { @@ -737,15 +744,17 @@ static inline void add_credits(struct TCP_Server_Info *server, const unsigned int add, const int optype) { - server->ops->add_credits(server, add, optype); + struct cifs_credits credits = { .value = add, .instance = 0 }; + + server->ops->add_credits(server, &credits, optype); } static inline void -add_credits_and_wake_if(struct TCP_Server_Info *server, const unsigned int add, - const int optype) +add_credits_and_wake_if(struct TCP_Server_Info *server, + const struct cifs_credits *credits, const int optype) { - if (add) { - server->ops->add_credits(server, add, optype); + if (credits->value) { + server->ops->add_credits(server, credits, optype); wake_up(&server->request_q); } } @@ -1253,7 +1262,7 @@ struct cifs_readdata { unsigned int pagesz; unsigned int page_offset; unsigned int tailsz; - unsigned int credits; + struct cifs_credits credits; unsigned int nr_pages; struct page **pages; }; @@ -1279,7 +1288,7 @@ struct cifs_writedata { unsigned int pagesz; unsigned int page_offset; unsigned int tailsz; - unsigned int credits; + struct cifs_credits credits; unsigned int nr_pages; struct page **pages; }; |