linux-dev/fs/cifs/Kconfig, branch master

cifs: Support fscache indexing rewrite

2022-01-19T17:21:08Z

Change the cifs filesystem to take account of the changes to fscache's indexing rewrite and reenable caching in cifs. The following changes have been made: (1) The fscache_netfs struct is no more, and there's no need to register the filesystem as a whole. (2) The session cookie is now an fscache_volume cookie, allocated with fscache_acquire_volume(). That takes three parameters: a string representing the "volume" in the index, a string naming the cache to use (or NULL) and a u64 that conveys coherency metadata for the volume. For cifs, I've made it render the volume name string as: "cifs,," where the sharename has '/' characters replaced with ';'. This probably needs rethinking a bit as the total name could exceed the maximum filename component length. Further, the coherency data is currently just set to 0. It needs something else doing with it - I wonder if it would suffice simply to sum the resource_id, vol_create_time and vol_serial_number or maybe hash them. (3) The fscache_cookie_def is no more and needed information is passed directly to fscache_acquire_cookie(). The cache no longer calls back into the filesystem, but rather metadata changes are indicated at other times. fscache_acquire_cookie() is passed the same keying and coherency information as before. (4) The functions to set/reset cookies are removed and fscache_use_cookie() and fscache_unuse_cookie() are used instead. fscache_use_cookie() is passed a flag to indicate if the cookie is opened for writing. fscache_unuse_cookie() is passed updates for the metadata if we changed it (ie. if the file was opened for writing). These are called when the file is opened or closed. (5) cifs_setattr_*() are made to call fscache_resize() to change the size of the cache object. (6) The functions to read and write data are stubbed out pending a conversion to use netfslib. Changes ======= ver #8: - Abstract cache invalidation into a helper function. - Fix some checkpatch warnings[3]. ver #7: - Removed the accidentally added-back call to get the super cookie in cifs_root_iget(). - Fixed the right call to cifs_fscache_get_super_cookie() to take account of the "-o fsc" mount flag. ver #6: - Moved the change of gfpflags_allow_blocking() to current_is_kswapd() for cifs here. - Fixed one of the error paths in cifs_atomic_open() to jump around the call to use the cookie. - Fixed an additional successful return in the middle of cifs_open() to use the cookie on the way out. - Only get a volume cookie (and thus inode cookies) when "-o fsc" is supplied to mount. ver #5: - Fixed a couple of bits of cookie handling[2]: - The cookie should be released in cifs_evict_inode(), not cifsFileInfo_put_final(). The cookie needs to persist beyond file closure so that writepages will be able to write to it. - fscache_use_cookie() needs to be called in cifs_atomic_open() as it is for cifs_open(). ver #4: - Fixed the use of sizeof with memset. - tcon->vol_create_time is __le64 so doesn't need cpu_to_le64(). ver #3: - Canonicalise the cifs coherency data to make the cache portable. - Set volume coherency data. ver #2: - Use gfpflags_allow_blocking() rather than using flag directly. - Upgraded to -rc4 to allow for upstream changes[1]. - fscache_acquire_volume() now returns errors. Signed-off-by: David Howells Acked-by: Jeff Layton cc: Steve French cc: Shyam Prasad N cc: linux-cifs@vger.kernel.org cc: linux-cachefs@redhat.com Link: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=23b55d673d7527b093cd97b7c217c82e70cd1af0 [1] Link: https://lore.kernel.org/r/3419813.1641592362@warthog.procyon.org.uk/ [2] Link: https://lore.kernel.org/r/CAH2r5muTanw9pJqzAHd01d9A8keeChkzGsCEH6=0rHutVLAF-A@mail.gmail.com/ [3] Link: https://lore.kernel.org/r/163819671009.215744.11230627184193298714.stgit@warthog.procyon.org.uk/ # v1 Link: https://lore.kernel.org/r/163906982979.143852.10672081929614953210.stgit@warthog.procyon.org.uk/ # v2 Link: https://lore.kernel.org/r/163967187187.1823006.247415138444991444.stgit@warthog.procyon.org.uk/ # v3 Link: https://lore.kernel.org/r/164021579335.640689.2681324337038770579.stgit@warthog.procyon.org.uk/ # v4 Link: https://lore.kernel.org/r/3462849.1641593783@warthog.procyon.org.uk/ # v5 Link: https://lore.kernel.org/r/1318953.1642024578@warthog.procyon.org.uk/ # v6 Signed-off-by: Steve French

fscache, cachefiles: Disable configuration

2022-01-07T09:21:44Z

Disable fscache and cachefiles in Kconfig whilst it is rewritten. Signed-off-by: David Howells Reviewed-by: Jeff Layton cc: linux-cachefs@redhat.com Link: https://lore.kernel.org/r/163819576672.215744.12444272479560406780.stgit@warthog.procyon.org.uk/ # v1 Link: https://lore.kernel.org/r/163906882835.143852.11073015983885872901.stgit@warthog.procyon.org.uk/ # v2 Link: https://lore.kernel.org/r/163967075113.1823006.277316290062782998.stgit@warthog.procyon.org.uk/ # v3 Link: https://lore.kernel.org/r/164021481179.640689.2004199594774033658.stgit@warthog.procyon.org.uk/ # v4

cifs: create a MD4 module and switch cifs.ko to use it

2021-08-25T20:48:00Z

MD4 support will likely be removed from the crypto directory, but is needed for compression of NTLMSSP in SMB3 mounts. Signed-off-by: Ronnie Sahlberg Signed-off-by: Steve French

cifs: fork arc4 and create a separate module for it for cifs and other users

2021-08-25T20:47:57Z

We can not drop ARC4 and basically destroy CIFS connectivity for almost all CIFS users so create a new forked ARC4 module that CIFS and other subsystems that have a hard dependency on ARC4 can use. Signed-off-by: Ronnie Sahlberg Signed-off-by: Steve French

cifs: remove support for NTLM and weaker authentication algorithms

2021-08-25T20:47:06Z

for SMB1. This removes the dependency to DES. Signed-off-by: Ronnie Sahlberg Signed-off-by: Steve French

cifs: decoding negTokenInit with generic ASN1 decoder

2021-06-21T02:28:17Z

Decode negTokenInit with lib/asn1_decoder. For that, add OIDs in linux/oid_registry.h and a negTokenInit ASN1 file, "spnego_negtokeninit.asn1". And define decoder's callback functions, which are the gssapi_this_mech for checking SPENGO oid and the neg_token_init_mech_type for getting authentication mechanisms supported by a server. Signed-off-by: Hyunchul Lee Reviewed-by: Aurelien Aptel Reviewed-by: Paulo Alcantara (SUSE) Signed-off-by: Steve French

cifs: enable extended stats by default

2021-06-21T02:28:17Z

CONFIG_CIFS_STATS2 can be very useful since it shows latencies by command, and allows enabling the slow response dynamic tracepoint which can be useful to identify performance problems. For example: Total time spent processing by command. Time units are jiffies (1000 per second) SMB3 CMD Number Total Time Fastest Slowest -------- ------ ---------- ------- ------- 0 1 2 2 2 1 2 6 2 4 2 0 0 0 0 3 4 11 2 4 4 2 16 5 11 5 4546 34104 2 487 6 4421 32901 2 487 7 0 0 0 0 8 695 2781 2 39 9 391 1708 2 27 10 0 0 0 0 11 4 6 1 2 12 0 0 0 0 13 0 0 0 0 14 3887 17696 0 128 15 0 0 0 0 16 1471 9950 1 487 17 169 2695 9 116 18 80 381 2 10 1 2 6 2 4 2 0 0 0 0 3 4 11 2 4 4 2 16 5 11 5 4546 34104 2 487 6 4421 32901 2 487 7 0 0 0 0 8 695 2781 2 39 9 391 1708 2 27 10 0 0 0 0 11 4 6 1 2 12 0 0 0 0 13 0 0 0 0 14 3887 17696 0 128 15 0 0 0 0 16 1471 9950 1 487 17 169 2695 9 116 18 80 381 2 10 Reviewed-by: Aurelien Aptel Reviewed-by: Paulo Alcantara (SUSE) Signed-off-by: Steve French

cifs: On cifs_reconnect, resolve the hostname again.

2021-04-08T02:29:36Z

On cifs_reconnect, make sure that DNS resolution happens again. It could be the cause of connection to go dead in the first place. This also contains the fix for a build issue identified by Intel bot. Reported-by: kernel test robot Signed-off-by: Shyam Prasad N Reviewed-by: Paulo Alcantara (SUSE) Reviewed-by: Pavel Shilovsky CC: # 5.11+ Signed-off-by: Steve French

cifs: minor updates to Kconfig

2020-12-14T15:16:22Z

Correct references to fs/cifs/README which has been replaced by Documentation/filesystems/admin-guide/cifs/usage.rst, and also correct a typo. Reviewed-by: Aurelien Aptel Signed-off-by: Steve French

cifs: Register generic netlink family

2020-12-14T15:16:22Z

Register a new generic netlink family to talk to the witness service userspace daemon. Signed-off-by: Samuel Cabrero Reviewed-by: Aurelien Aptel Signed-off-by: Steve French