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path: root/fs/cifs/fs_context.c
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2022-08-12smb3: allow deferred close timeout to be configurableSteve French1-0/+9
Deferred close can be a very useful feature for allowing caching data for read, and for minimizing the number of reopens needed for a file that is repeatedly opened and close but there are workloads where its default (1 second, similar to actimeo/acregmax) is much too small. Allow the user to configure the amount of time we can defer sending the final smb3 close when we have a handle lease on the file (rather than forcing it to depend on value of actimeo which is often unrelated, and less safe). Adds new mount parameter "closetimeo=" which is the maximum number of seconds we can wait before sending an SMB3 close when we have a handle lease for it. Default value also is set to slightly larger at 5 seconds (although some other clients use larger default this should still help). Suggested-by: Bharath SM <bharathsm@microsoft.com> Reviewed-by: Bharath SM <bharathsm@microsoft.com> Reviewed-by: Shyam Prasad N <sprasad@microsoft.com> Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz> Signed-off-by: Steve French <stfrench@microsoft.com>
2022-05-25cifs: fix ntlmssp on old serversPaulo Alcantara1-25/+4
Some older servers seem to require the workstation name during ntlmssp to be at most 15 chars (RFC1001 name length), so truncate it before sending when using insecure dialects. Link: https://lore.kernel.org/r/e6837098-15d9-acb6-7e34-1923cf8c6fe1@winds.org Reported-by: Byron Stanoszek <gandalf@winds.org> Tested-by: Byron Stanoszek <gandalf@winds.org> Fixes: 49bd49f983b5 ("cifs: send workstation name during ntlmssp session setup") Cc: stable@vger.kernel.org Signed-off-by: Paulo Alcantara (SUSE) <pc@cjr.nz> Signed-off-by: Steve French <stfrench@microsoft.com>
2022-05-24smb3: add mount parm nosparseSteve French1-0/+4
To reduce risk of applications breaking that mount to servers with only partial sparse file support, add optional mount parm "nosparse" which disables setting files sparse (and thus will return EOPNOTSUPP on certain fallocate operations). Acked-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2022-02-13smb3: fix snapshot mount optionSteve French1-2/+2
The conversion to the new API broke the snapshot mount option due to 32 vs. 64 bit type mismatch Fixes: 24e0a1eff9e2 ("cifs: switch to new mount api") Cc: stable@vger.kernel.org # 5.11+ Reported-by: <ruckajan10@gmail.com> Acked-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2022-01-18cifs: serialize all mount attemptsRonnie Sahlberg1-1/+7
RHBZ: 2008434 Some servers, such as Windows2016 have a very low number of concurrent mounts that they allow from each client. This can be a problem if you have a more than a handful (==3 in this case) of cifs entries in your fstab and cause a number of the mounts there to randomly fail. Add a global mutex and use it to serialize all mount attempts. Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-12-18cifs: sanitize multiple delimiters in prepathThiago Rafael Becker1-1/+37
mount.cifs can pass a device with multiple delimiters in it. This will cause rename(2) to fail with ENOENT. V2: - Make sanitize_path more readable. - Fix multiple delimiters between UNC and prepath. - Avoid a memory leak if a bad user starts putting a lot of delimiters in the path on purpose. BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=2031200 Fixes: 24e0a1eff9e2 ("cifs: switch to new mount api") Cc: stable@vger.kernel.org # 5.11+ Acked-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Thiago Rafael Becker <trbecker@gmail.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-11-12cifs: fix memory leak of smb3_fs_context_dup::server_hostnamePaulo Alcantara1-0/+2
Fix memory leak of smb3_fs_context_dup::server_hostname when parsing and duplicating fs contexts during mount(2) as reported by kmemleak: unreferenced object 0xffff888125715c90 (size 16): comm "mount.cifs", pid 3832, jiffies 4304535868 (age 190.094s) hex dump (first 16 bytes): 7a 65 6c 64 61 2e 74 65 73 74 00 6b 6b 6b 6b a5 zelda.test.kkkk. backtrace: [<ffffffff8168106e>] kstrdup+0x2e/0x60 [<ffffffffa027a362>] smb3_fs_context_dup+0x392/0x8d0 [cifs] [<ffffffffa0136353>] cifs_smb3_do_mount+0x143/0x1700 [cifs] [<ffffffffa02795e8>] smb3_get_tree+0x2e8/0x520 [cifs] [<ffffffff817a19aa>] vfs_get_tree+0x8a/0x2d0 [<ffffffff8181e3e3>] path_mount+0x423/0x1a10 [<ffffffff8181fbca>] __x64_sys_mount+0x1fa/0x270 [<ffffffff83ae364b>] do_syscall_64+0x3b/0x90 [<ffffffff83c0007c>] entry_SYSCALL_64_after_hwframe+0x44/0xae unreferenced object 0xffff888111deed20 (size 32): comm "mount.cifs", pid 3832, jiffies 4304536044 (age 189.918s) hex dump (first 32 bytes): 44 46 53 52 4f 4f 54 31 2e 5a 45 4c 44 41 2e 54 DFSROOT1.ZELDA.T 45 53 54 00 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b a5 EST.kkkkkkkkkkk. backtrace: [<ffffffff8168118d>] kstrndup+0x2d/0x90 [<ffffffffa027ab2e>] smb3_parse_devname+0x9e/0x360 [cifs] [<ffffffffa01870c8>] cifs_setup_volume_info+0xa8/0x470 [cifs] [<ffffffffa018c469>] connect_dfs_target+0x309/0xc80 [cifs] [<ffffffffa018d6cb>] cifs_mount+0x8eb/0x17f0 [cifs] [<ffffffffa0136475>] cifs_smb3_do_mount+0x265/0x1700 [cifs] [<ffffffffa02795e8>] smb3_get_tree+0x2e8/0x520 [cifs] [<ffffffff817a19aa>] vfs_get_tree+0x8a/0x2d0 [<ffffffff8181e3e3>] path_mount+0x423/0x1a10 [<ffffffff8181fbca>] __x64_sys_mount+0x1fa/0x270 [<ffffffff83ae364b>] do_syscall_64+0x3b/0x90 [<ffffffff83c0007c>] entry_SYSCALL_64_after_hwframe+0x44/0xae Fixes: 7be3248f3139 ("cifs: To match file servers, make sure the server hostname matches") Signed-off-by: Paulo Alcantara (SUSE) <pc@cjr.nz> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-11-08cifs: send workstation name during ntlmssp session setupShyam Prasad N1-3/+31
During the ntlmssp session setup (authenticate phases) send the client workstation info. This can make debugging easier on servers. Signed-off-by: Shyam Prasad N <sprasad@microsoft.com> Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz> Reviewed-by: Enzo Matsumiya <ematsumiya@suse.de> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-11-02cifs: add mount parameter tcpnodelaySteve French1-0/+8
Although corking and uncorking the socket (which cifs.ko already does) should usually have the desired benefit, using the new tcpnodelay mount option causes tcp_sock_set_nodelay() to be set on the socket which may be useful in order to ensure that we don't ever have cases where the network stack is waiting on sending an SMB request until multiple SMB requests have been added to the send queue (since this could lead to long latencies). To enable it simply append "tcpnodelay" it to the mount options Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-11-02cifs: To match file servers, make sure the server hostname matchesShyam Prasad N1-0/+8
We generally rely on a bunch of factors to differentiate between servers. For example, IP address, port etc. For certain server types (like Azure), it is important to make sure that the server hostname matches too, even if the both hostnames currently resolve to the same IP address. Signed-off-by: Shyam Prasad N <sprasad@microsoft.com> Cc: stable@vger.kernel.org Signed-off-by: Steve French <stfrench@microsoft.com>
2021-08-25cifs: remove support for NTLM and weaker authentication algorithmsRonnie Sahlberg1-14/+0
for SMB1. This removes the dependency to DES. Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-08-25smb3: fix posix extensions mount optionSteve French1-2/+9
We were incorrectly initializing the posix extensions in the conversion to the new mount API. CC: <stable@vger.kernel.org> # 5.11+ Reported-by: Christian Brauner <christian.brauner@ubuntu.com> Acked-by: Christian Brauner <christian.brauner@ubuntu.com> Suggested-by: Namjae Jeon <namjae.jeon@samsung.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-07-29cifs: add missing parsing of backupuidRonnie Sahlberg1-0/+7
We lost parsing of backupuid in the switch to new mount API. Add it back. Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> Reviewed-by: Shyam Prasad N <sprasad@microsoft.com> Cc: <stable@vger.kernel.org> # v5.11+ Reported-by: Xiaoli Feng <xifeng@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-07-22cifs: support share failover when remountingPaulo Alcantara1-0/+7
When remouting a DFS share, force a new DFS referral of the path and if the currently cached targets do not match any of the new targets or there was no cached targets, then mark it for reconnect. For example: $ mount //dom/dfs/link /mnt -o username=foo,password=bar $ ls /mnt oldfile.txt change target share of 'link' in server settings $ mount /mnt -o remount,username=foo,password=bar $ ls /mnt newfile.txt Signed-off-by: Paulo Alcantara (SUSE) <pc@cjr.nz> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-07-09cifs: use helpers when parsing uid/gid mount options and validate themRonnie Sahlberg1-5/+19
Use the nice helpers to initialize and the uid/gid/cred_uid when passed as mount arguments. Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> Acked-by: Pavel Shilovsky <pshilovsky@samba.org> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-05-20cifs: Fix inconsistent indentingJiapeng Chong1-1/+1
Eliminate the follow smatch warning: fs/cifs/fs_context.c:1148 smb3_fs_context_parse_param() warn: inconsistent indenting. Reported-by: Abaci Robot <abaci@linux.alibaba.com> Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-05-08smb3: if max_channels set to more than one channel request multichannelSteve French1-0/+3
Mounting with "multichannel" is obviously implied if user requested more than one channel on mount (ie mount parm max_channels>1). Currently both have to be specified. Fix that so that if max_channels is greater than 1 on mount, enable multichannel rather than silently falling back to non-multichannel. Signed-off-by: Steve French <stfrench@microsoft.com> Reviewed-By: Tom Talpey <tom@talpey.com> Cc: <stable@vger.kernel.org> # v5.11+ Reviewed-by: Shyam Prasad N <sprasad@microsoft.com>
2021-05-04cifs: fix regression when mounting shares with prefix pathsPaulo Alcantara1-0/+4
The commit 315db9a05b7a ("cifs: fix leak in cifs_smb3_do_mount() ctx") revealed an existing bug when mounting shares that contain a prefix path or DFS links. cifs_setup_volume_info() requires the @devname to contain the full path (UNC + prefix) to update the fs context with the new UNC and prepath values, however we were passing only the UNC path (old_ctx->UNC) in @device thus discarding any prefix paths. Instead of concatenating both old_ctx->{UNC,prepath} and pass it in @devname, just keep the dup'ed values of UNC and prepath in cifs_sb->ctx after calling smb3_fs_context_dup(), and fix smb3_parse_devname() to correctly parse and not leak the new UNC and prefix paths. Cc: <stable@vger.kernel.org> # v5.11+ Fixes: 315db9a05b7a ("cifs: fix leak in cifs_smb3_do_mount() ctx") Signed-off-by: Paulo Alcantara (SUSE) <pc@cjr.nz> Acked-by: David Disseldorp <ddiss@suse.de> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-05-03cifs: add shutdown supportSteve French1-0/+1
Various filesystem support the shutdown ioctl which is used by various xfstests. The shutdown ioctl sets a flag on the superblock which prevents open, unlink, symlink, hardlink, rmdir, create etc. on the file system until unmount and remounted. The two flags supported in this patch are: FSOP_GOING_FLAGS_LOGFLUSH and FSOP_GOING_FLAGS_NOLOGFLUSH which require very little other than blocking new operations (since we do not cache writes to metadata on the client with cifs.ko). FSOP_GOING_FLAGS_DEFAULT is not supported yet, but could be added in the future but would need to call syncfs or equivalent to write out pending data on the mount. With this patch various xfstests now work including tests 043 through 046 for example. Signed-off-by: Steve French <stfrench@microsoft.com> Reviewed-by: Aurelien Aptel <aaptel@suse.com>
2021-04-26smb3: add rasize mount parameter to improve readahead performanceSteve French1-1/+24
In some cases readahead of more than the read size can help (to allow parallel i/o of read ahead which can improve performance). Ceph introduced a mount parameter "rasize" to allow controlling this. Add mount parameter "rasize" to allow control of amount of readahead requested of the server. If rasize not set, rasize defaults to negotiated rsize as before. Reviewed-by: Shyam Prasad N <sprasad@microsoft.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-04-26cifs: log mount errors using cifs_errorf()Aurelien Aptel1-49/+46
This makes the errors accessible from userspace via dmesg and the fs_context fd. Signed-off-by: Aurelien Aptel <aaptel@suse.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-04-26cifs: add fs_context param to parsing helpersAurelien Aptel1-10/+11
Add fs_context param to parsing helpers to be able to log into it in next patch. Make some helper static as they are not used outside of fs_context.c Signed-off-by: Aurelien Aptel <aaptel@suse.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-04-26cifs: don't cargo-cult strndup()Al Viro1-1/+1
strndup(s, strlen(s)) is a highly unidiomatic way to spell strdup(s); it's *NOT* safer in any way, since strlen() is just as sensitive to NUL-termination as strdup() is. strndup() is for situations when you need a copy of a known-sized substring, not a magic security juju to drive the bad spirits away. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-03-19cifs: warn and fail if trying to use rootfs without the config optionAurelien Aptel1-2/+4
If CONFIG_CIFS_ROOT is not set, rootfs mount option is invalid Signed-off-by: Aurelien Aptel <aaptel@suse.com> CC: <stable@vger.kernel.org> # v5.11 Signed-off-by: Steve French <stfrench@microsoft.com>
2021-02-25cifs: fix handling of escaped ',' in the password mount argumentRonnie Sahlberg1-13/+30
Passwords can contain ',' which are also used as the separator between mount options. Mount.cifs will escape all ',' characters as the string ",,". Update parsing of the mount options to detect ",," and treat it as a single 'c' character. Fixes: 24e0a1eff9e2 ("cifs: switch to new mount api") Cc: stable@vger.kernel.org # 5.11 Reported-by: Simon Taylor <simon@simon-taylor.me.uk> Tested-by: Simon Taylor <simon@simon-taylor.me.uk> Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-02-25cifs: Add new parameter "acregmax" for distinct file and directory metadata ↵Steve French1-5/+18
timeout The new optional mount parameter "acregmax" allows a different timeout for file metadata ("acdirmax" now allows controlling timeout for directory metadata). Setting "actimeo" still works as before, and changes timeout for both files and directories, but specifying "acregmax" or "acdirmax" allows overriding the default more granularly which can be a big performance benefit on some workloads. "acregmax" is already used by NFS as a mount parameter (albeit with a larger default and thus looser caching). Suggested-by: Tom Talpey <tom@talpey.com> Reviewed-By: Tom Talpey <tom@talpey.com> Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-02-25cifs: Add new mount parameter "acdirmax" to allow caching directory metadataSteve French1-0/+9
nfs and cifs on Linux currently have a mount parameter "actimeo" to control metadata (attribute) caching but cifs does not have additional mount parameters to allow distinguishing between caching directory metadata (e.g. needed to revalidate paths) and that for files. Add new mount parameter "acdirmax" to allow caching metadata for directories more loosely than file data. NFS adjusts metadata caching from acdirmin to acdirmax (and another two mount parms for files) but to reduce complexity, it is safer to just introduce the one mount parm to allow caching directories longer. The defaults for acdirmax and actimeo (for cifs.ko) are conservative, 1 second (NFS defaults acdirmax to 60 seconds). For many workloads, setting acdirmax to a higher value is safe and will improve performance. This patch leaves unchanged the default values for caching metadata for files and directories but gives the user more flexibility in adjusting them safely for their workload via the new mount parm. Signed-off-by: Steve French <stfrench@microsoft.com> Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com> Reviewed-By: Tom Talpey <tom@talpey.com>
2021-02-15smb3: negotiate current dialect (SMB3.1.1) when version 3 or greater requestedSteve French1-1/+1
SMB3.1.1 is the newest, and preferred dialect, and is included in the requested dialect list by default (ie if no vers= is specified on mount) but it should also be requested if SMB3 or later is requested (vers=3 instead of a specific dialect: vers=2.1, vers=3.02 or vers=3.0). Currently specifying "vers=3" only requests smb3.0 and smb3.02 but this patch fixes it to also request smb3.1.1 dialect, as it is the newest and most secure dialect and is a "version 3 or later" dialect (the intent of "vers=3"). Signed-off-by: Steve French <stfrench@microsoft.com> Suggested-by: Pavel Shilovsky <pshilov@microsoft.com> Reviewed-by: Shyam Prasad N <sprasad@microsoft.com> Reviewed-by: Pavel Shilovsky <pshilov@microsoft.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-02-11cifs: In the new mount api we get the full devname as source=Ronnie Sahlberg1-1/+15
so we no longer need to handle or parse the UNC= and prefixpath= options that mount.cifs are generating. This also fixes a bug in the mount command option where the devname would be truncated into just //server/share because we were looking at the truncated UNC value and not the full path. I.e. in the mount command output the devive //server/share/path would show up as just //server/share Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> Reviewed-by: Shyam Prasad N <nspmangalore@gmail.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-02-10cifs: do not disable noperm if multiuser mount option is not providedRonnie Sahlberg1-2/+2
Fixes small regression in implementation of new mount API. Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> Reported-by: Hyunchul Lee <hyc.lee@gmail.com> Tested-by: Hyunchul Lee <hyc.lee@gmail.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-01-29cifs: fix dfs domain referralsRonnie Sahlberg1-0/+31
The new mount API requires additional changes to how DFS is handled. Additional testing of DFS uncovered problems with domain based DFS referrals (a follow on patch addresses DFS links) which this patch addresses. Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Paulo Alcantara (SUSE) <pc@cjr.nz> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-01-29cifs: returning mount parm processing errors correctlySteve French1-4/+4
During additional testing of the updated cifs.ko with the new mount API support, we found a few additional cases where we were logging errors, but not returning them to the user. For example: a) invalid security mechanisms b) invalid cache options c) unsupported rdma d) invalid smb dialect requested Fixes: 24e0a1eff9e2 ("cifs: switch to new mount api") Acked-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-01-28cifs: fix mounts to subdirectories of targetSteve French1-0/+1
The "prefixpath" mount option needs to be ignored which was missed in the recent conversion to the new mount API (prefixpath would be set by the mount helper if mounting a subdirectory of the root of a share e.g. //server/share/subdir) Fixes: 24e0a1eff9e2 ("cifs: switch to new mount api") Suggested-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com> Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
2021-01-28cifs: ignore auto and noauto options if givenAdam Harvey1-0/+1
In 24e0a1eff9e2, the noauto and auto options were missed when migrating to the new mount API. As a result, users with noauto in their fstab mount options are now unable to mount cifs filesystems, as they'll receive an "Unknown parameter" error. This restores the old behaviour of ignoring noauto and auto if they're given. Fixes: 24e0a1eff9e2 ("cifs: switch to new mount api") Signed-off-by: Adam Harvey <adam@adamharvey.name> Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2021-01-13fs: cifs: remove unneeded variable in smb3_fs_context_dupMenglong Dong1-3/+1
'rc' in smb3_fs_context_dup is not used and can be removed. Signed-off-by: Menglong Dong <dong.menglong@zte.com.cn> Reviewed-by: Aurelien Aptel <aaptel@suse.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2020-12-17cifs: Fix support for remount when not changing rsize/wsizeSteve French1-0/+7
When remounting with the new mount API, we need to set rsize and wsize to the previous values if they are not passed in on the remount. Otherwise they get set to zero which breaks xfstest 452 for example. Signed-off-by: Steve French <stfrench@microsoft.com> Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com> Reviewed-by: Shyam Prasad N <sprasad@microsoft.com>
2020-12-17cifs: handle "guest" mount parameterSteve French1-0/+4
With the new mount API it can not handle empty strings for mount parms ("guest" is mapped in userspace mount helper to "user=") so we have to special case it as we do for the password mount parm. Signed-off-by: Steve French <stfrench@microsoft.com> Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
2020-12-16cifs: correct four aliased mount parms to allow use of previous namesSteve French1-5/+10
The updates to the new mount API created aliases for some mount parms e.g. esize, idsfromsid, modefromsid, signloosely as "min_enc_offload", "setuidfromacl", "modesid", "ignore_signature" but did not add back in the original name expected by test cases and current users. It also had incorrect names for a few less used mount parms. Signed-off-by: Steve French <stfrench@microsoft.com> Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com>
2020-12-16smb3: remind users that witness protocol is experimentalSteve French1-0/+1
warn_once when using the witness protocol that it is experimental Signed-off-by: Steve French <stfrench@microsoft.com> Reviewed-by: Samuel Cabrero <scabrero@suse.de> Reviewed-by: Shyam Prasad N <sprasad@microsoft.com>
2020-12-14cifs: fix uninitialized variable in smb3_fs_context_parse_paramRonnie Sahlberg1-1/+3
Addresses an issue noted by the kernel test robot Reported-by: kernel test robot <lkp@intel.com> Signed-off-by: Steve French <stfrench@microsoft.com> Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com>
2020-12-14cifs: update mnt_cifs_flags during reconfigureRonnie Sahlberg1-0/+1
Many mount flags (e.g. for noperm, noxattr, nobrl, cifsacl, mfsymlinks and more) can be updated now. Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2020-12-14cifs: move update of flags into a separate functionRonnie Sahlberg1-0/+155
This function will set/clear flags that can be changed during mount or remount Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2020-12-14cifs: do not allow changing posix_paths during remountRonnie Sahlberg1-0/+4
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2020-12-14cifs: simplify handling of cifs_sb/ctx->local_nlsRonnie Sahlberg1-4/+0
Only load/unload local_nls from cifs_sb and just make the ctx contain a pointer to cifs_sb->ctx. Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2020-12-14cifs: we do not allow changing username/password/unc/... during remountRonnie Sahlberg1-3/+50
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2020-12-14cifs: add initial reconfigure supportRonnie Sahlberg1-3/+33
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2020-12-14cifs: move [brw]size from cifs_sb to cifs_sb->ctxRonnie Sahlberg1-0/+3
Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2020-12-14cifs: move cifs_cleanup_volume_info[_content] to fs_context.cRonnie Sahlberg1-3/+42
and rename it to smb3_cleanup_fs_context[_content] Signed-off-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2020-12-14cifs: Add missing sentinel to smb3_fs_parametersDmitry Osipenko1-0/+1
Add missing sentinel to smb3_fs_parameters. This fixes ARM32 kernel crashing once CIFS is registered. Unable to handle kernel paging request at virtual address 33626d73 ... (strcmp) from (fs_validate_description) (fs_validate_description) from (register_filesystem) (register_filesystem) from (init_cifs [cifs]) (init_cifs [cifs]) from (do_one_initcall) (do_one_initcall) from (do_init_module) (do_init_module) from (load_module) (load_module) from (sys_finit_module) (sys_finit_module) from (ret_fast_syscal) Fixes: e07724d1cf38 ("cifs: switch to new mount api") Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Reviewed-by: Aurelien Aptel <aaptel@suse.com> Signed-off-by: Steve French <stfrench@microsoft.com>
2020-12-14cifs: add witness mount option and data structsSamuel Cabrero1-0/+8
Add 'witness' mount option to register for witness notifications. Signed-off-by: Samuel Cabrero <scabrero@suse.de> Reviewed-by: Aurelien Aptel <aaptel@suse.com> Signed-off-by: Steve French <stfrench@microsoft.com>