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| author |   Shyam Prasad N <sprasad@microsoft.com> | 2022-04-08 13:31:37 +0000 |
|---|---|---|
| committer |   Steve French <stfrench@microsoft.com> | 2022-05-24 14:16:32 -0500 |
| commit | 5752bf645f9dd7db600651f726eb04a97c9f597f (patch) | |
| tree | f486c71eb05d7e37800e182d49325838ac0c2af3 /fs/cifs/cifsglob.h | |
| parent | cifs: use new enum for ses_status (diff) | |
| download | linux-dev-5752bf645f9dd7db600651f726eb04a97c9f597f.tar.xz linux-dev-5752bf645f9dd7db600651f726eb04a97c9f597f.zip | |
cifs: avoid parallel session setups on same channel
After allowing channels to reconnect in parallel, it now
becomes important to take care that multiple processes do not
call negotiate/session setup in parallel on the same channel.
This change avoids that by marking a channel as "in_reconnect".
During session setup if the channel in question has this flag
set, we return immediately.
Signed-off-by: Shyam Prasad N <sprasad@microsoft.com>
Signed-off-by: Steve French <stfrench@microsoft.com>
Diffstat (limited to 'fs/cifs/cifsglob.h')
| -rw-r--r-- | fs/cifs/cifsglob.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h index 711cf51ac14f..8880a26f234f 100644 --- a/fs/cifs/cifsglob.h +++ b/fs/cifs/cifsglob.h @@ -922,6 +922,7 @@ struct cifs_server_iface { }; struct cifs_chan { + unsigned int in_reconnect : 1; /* if session setup in progress for this channel */ struct TCP_Server_Info *server; __u8 signkey[SMB3_SIGN_KEY_SIZE]; }; @@ -984,12 +985,16 @@ struct cifs_ses { #define CIFS_MAX_CHANNELS 16 #define CIFS_ALL_CHANNELS_SET(ses) \ ((1UL << (ses)->chan_count) - 1) +#define CIFS_ALL_CHANS_GOOD(ses) \ + (!(ses)->chans_need_reconnect) #define CIFS_ALL_CHANS_NEED_RECONNECT(ses) \ ((ses)->chans_need_reconnect == CIFS_ALL_CHANNELS_SET(ses)) #define CIFS_SET_ALL_CHANS_NEED_RECONNECT(ses) \ ((ses)->chans_need_reconnect = CIFS_ALL_CHANNELS_SET(ses)) #define CIFS_CHAN_NEEDS_RECONNECT(ses, index) \ test_bit((index), &(ses)->chans_need_reconnect) +#define CIFS_CHAN_IN_RECONNECT(ses, index) \ + ((ses)->chans[(index)].in_reconnect) struct cifs_chan chans[CIFS_MAX_CHANNELS]; size_t chan_count; |