summaryrefslogtreecommitdiffstats
path: root/fs/cifs
Commit message (Collapse)AuthorAgeFilesLines
* cifs: avoid potential races when handling multiple dfs tconsPaulo Alcantara2023-05-115-79/+80
| | | | | | | | | | | | | | | | commit 6be2ea33a4093402252724a00c4af8033725184c upstream. Now that a DFS tcon manages its own list of DFS referrals and sessions, there is no point in having a single worker to refresh referrals of all DFS tcons. Make it faster and less prone to race conditions when having several mounts by queueing a worker per DFS tcon that will take care of refreshing only the DFS referrals related to it. Cc: stable@vger.kernel.org # v6.2+ Signed-off-by: Paulo Alcantara (SUSE) <pc@manguebit.com> Signed-off-by: Steve French <stfrench@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* cifs: protect access of TCP_Server_Info::{origin,leaf}_fullpathPaulo Alcantara2023-05-115-20/+43
| | | | | | | | | | | | | commit 3dc9c433c9dde15477d02b609ccb4328e2adb6dc upstream. Protect access of TCP_Server_Info::{origin,leaf}_fullpath when matching DFS connections, and get rid of TCP_Server_Info::current_fullpath while we're at it. Cc: stable@vger.kernel.org # v6.2+ Signed-off-by: Paulo Alcantara (SUSE) <pc@manguebit.com> Signed-off-by: Steve French <stfrench@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* cifs: fix potential race when tree connecting ipcPaulo Alcantara2023-05-111-7/+50
| | | | | | | | | | | | | | | commit ee20d7c6100752eaf2409d783f4f1449c29ea33d upstream. Protect access of TCP_Server_Info::hostname when building the ipc tree name as it might get freed in cifsd thread and thus causing an use-after-free bug in __tree_connect_dfs_target(). Also, while at it, update status of IPC tcon on success and then avoid any extra tree connects. Cc: stable@vger.kernel.org # v6.2+ Signed-off-by: Paulo Alcantara (SUSE) <pc@manguebit.com> Signed-off-by: Steve French <stfrench@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* cifs: fix sharing of DFS connectionsPaulo Alcantara2023-05-116-80/+147
| | | | | | | | | | | | | | | | | | | | | | | | | | | | commit 8e3554150d6c80a84b3cb046615d1a0e943811dc upstream. When matching DFS connections, we can't rely on the values set in cifs_sb_info::prepath and cifs_tcon::tree_name as they might change during DFS failover. The DFS referrals related to a specific DFS tcon are already matched earlier in match_server(), therefore we can safely skip those checks altogether as the connection is guaranteed to be unique for the DFS tcon. Besides, when creating or finding an SMB session, make sure to also refcount any DFS root session related to it (cifs_ses::dfs_root_ses), so if a new DFS mount ends up reusing the connection from the old mount while there was an umount(2) still in progress (e.g. umount(2) -> cifs_umount() -> reconnect -> cifs_put_tcon()), the connection could potentially be put right after the umount(2) finished. Patch has minor update to include fix for unused variable issue noted by the kernel test robot Reported-by: kernel test robot <lkp@intel.com> Link: https://lore.kernel.org/oe-kbuild-all/202305041040.j7W2xQSy-lkp@intel.com/ Cc: stable@vger.kernel.org # v6.2+ Signed-off-by: Paulo Alcantara (SUSE) <pc@manguebit.com> Signed-off-by: Steve French <stfrench@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* cifs: protect session status check in smb2_reconnect()Paulo Alcantara2023-05-111-4/+11
| | | | | | | | | | | commit 5bff9f741af60b143a5ae73417a8ec47fd5ff2f4 upstream. Use @ses->ses_lock to protect access of @ses->ses_status. Cc: stable@vger.kernel.org Signed-off-by: Paulo Alcantara (SUSE) <pc@manguebit.com> Signed-off-by: Steve French <stfrench@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* cifs: fix potential use-after-free bugs in TCP_Server_Info::hostnamePaulo Alcantara2023-05-114-13/+23
| | | | | | | | | | | | | commit 90c49fce1c43e1cc152695e20363ff5087897c09 upstream. TCP_Server_Info::hostname may be updated once or many times during reconnect, so protect its access outside reconnect path as well and then prevent any potential use-after-free bugs. Cc: stable@vger.kernel.org Signed-off-by: Paulo Alcantara (SUSE) <pc@manguebit.com> Signed-off-by: Steve French <stfrench@microsoft.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
* SMB3: Close deferred file handles in case of handle lease breakBharath SM2023-05-112-1/+17
| | | | | | | | | | | | | [ Upstream commit d906be3fa571f6fc9381911304a0eca99f1b6951 ] We should not cache deferred file handles if we dont have handle lease on a file. And we should immediately close all deferred handles in case of handle lease break. Fixes: 9e31678fb403 ("SMB3: fix lease break timeout when multiple deferred close handles for the same file.") Signed-off-by: Bharath SM <bharathsm@microsoft.com> Signed-off-by: Steve French <stfrench@microsoft.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
* SMB3: Add missing locks to protect deferred close file listBharath SM2023-05-111-0/+6
| | | | | | | | | | | | | | | [ Upstream commit ab9ddc87a9055c4bebd6524d5d761d605d52e557 ] cifs_del_deferred_close function has a critical section which modifies the deferred close file list. We must acquire deferred_lock before calling cifs_del_deferred_close function. Fixes: ca08d0eac020 ("cifs: Fix memory leak on the deferred close") Signed-off-by: Bharath SM <bharathsm@microsoft.com> Acked-off-by: Paulo Alcantara (SUSE) <pc@manguebit.com> Acked-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com> Signed-off-by: Sasha Levin <sashal@kernel.org>
* cifs: Reapply lost fix from commit 30b2b2196d6eDavid Howells2023-04-181-4/+6
| | | | | | | | | | | | | | | | | | | Reapply the fix from: 30b2b2196d6e ("cifs: do not include page data when checking signature") that got lost in the iteratorisation of the cifs driver. Fixes: d08089f649a0 ("cifs: Change the I/O paths to use an iterator rather than a page list") Acked-by: Paulo Alcantara (SUSE) <pc@manguebit.com> Reported-by: Paulo Alcantara <pc@manguebit.com> Signed-off-by: David Howells <dhowells@redhat.com> cc: Paulo Alcantara <pc@cjr.nz> cc: Shyam Prasad N <nspmangalore@gmail.com> cc: Bharath S M <bharathsm@microsoft.com> cc: Enzo Matsumiya <ematsumiya@suse.de> cc: linux-cifs@vger.kernel.org Signed-off-by: Steve French <stfrench@microsoft.com>
* cifs: Fix unbuffered readDavid Howells2023-04-181-4/+0
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If read() is done in an unbuffered manner, such that, say, cifs_strict_readv() goes through cifs_user_readv() and thence __cifs_readv(), it doesn't recognise the EOF and keeps indicating to userspace that it returning full buffers of data. This is due to ctx->iter being advanced in cifs_send_async_read() as the buffer is split up amongst a number of rdata objects. The iterator count is then used in collect_uncached_read_data() in the non-DIO case to set the total length read - and thus the return value of sys_read(). But since the iterator normally gets used up completely during splitting, ctx->total_len gets overridden to the full amount. However, prior to that in collect_uncached_read_data(), we've gone through the list of rdatas and added up the amount of data we actually received (which we then throw away). Fix this by removing the bit that overrides the amount read in the non-DIO case and just going with the total added up in the aforementioned loop. This was observed by mounting a cifs share with multiple channels, e.g.: mount //192.168.6.1/test /test/ -o user=shares,pass=...,max_channels=6 and then reading a 1MiB file on the share: strace cat /xfstest.test/1M >/dev/null Through strace, the same data can be seen being read again and again. Fixes: d08089f649a0 ("cifs: Change the I/O paths to use an iterator rather than a page list") Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Paulo Alcantara (SUSE) <pc@manguebit.com> cc: Jérôme Glisse <jglisse@redhat.com> cc: Long Li <longli@microsoft.com> cc: Enzo Matsumiya <ematsumiya@suse.de> cc: Shyam Prasad N <nspmangalore@gmail.com> cc: Rohith Surabattula <rohiths.msft@gmail.com> cc: Jeff Layton <jlayton@kernel.org> cc: linux-cifs@vger.kernel.org Signed-off-by: Steve French <stfrench@microsoft.com>
* cifs: avoid dup prefix path in dfs_get_automount_devname()Paulo Alcantara2023-04-162-6/+18
| | | | | | | | | | | | | | | | | | | | | | | | @server->origin_fullpath already contains the tree name + optional prefix, so avoid calling __build_path_from_dentry_optional_prefix() as it might end up duplicating prefix path from @cifs_sb->prepath into final full path. Instead, generate DFS full path by simply merging @server->origin_fullpath with dentry's path. This fixes the following case mount.cifs //root/dfs/dir /mnt/ -o ... ls /mnt/link where cifs_dfs_do_automount() will call smb3_parse_devname() with @devname set to "//root/dfs/dir/link" instead of "//root/dfs/dir/dir/link". Fixes: 7ad54b98fc1f ("cifs: use origin fullpath for automounts") Cc: <stable@vger.kernel.org> # 6.2+ Signed-off-by: Paulo Alcantara (SUSE) <pc@manguebit.com> Signed-off-by: Steve French <stfrench@microsoft.com>
* cifs: fix negotiate context parsingDavid Disseldorp2023-04-151-10/+31
| | | | | | | | | | | | | smb311_decode_neg_context() doesn't properly check against SMB packet boundaries prior to accessing individual negotiate context entries. This is due to the length check omitting the eight byte smb2_neg_context header, as well as incorrect decrementing of len_of_ctxts. Fixes: 5100d8a3fe03 ("SMB311: Improve checking of negotiate security contexts") Reported-by: Volker Lendecke <vl@samba.org> Reviewed-by: Paulo Alcantara (SUSE) <pc@manguebit.com> Signed-off-by: David Disseldorp <ddiss@suse.de> Signed-off-by: Steve French <stfrench@microsoft.com>
* cifs: double lock in cifs_reconnect_tcon()Dan Carpenter2023-04-061-1/+1
| | | | | | | | | This lock was supposed to be an unlock. Fixes: 6cc041e90c17 ("cifs: avoid races in parallel reconnects in smb1") Signed-off-by: Dan Carpenter <error27@gmail.com> Reviewed-by: Paulo Alcantara (SUSE) <pc@manguebit.com> Signed-off-by: Steve French <stfrench@microsoft.com>
* cifs: sanitize paths in cifs_update_super_prepath.Thiago Rafael Becker2023-04-053-7/+11
| | | | | | | | | | | | | | | | After a server reboot, clients are failing to move files with ENOENT. This is caused by DFS referrals containing multiple separators, which the server move call doesn't recognize. v1: Initial patch. v2: Move prototype to header. Link: https://bugzilla.redhat.com/show_bug.cgi?id=2182472 Fixes: a31080899d5f ("cifs: sanitize multiple delimiters in prepath") Actually-Fixes: 24e0a1eff9e2 ("cifs: switch to new mount api") Reviewed-by: Paulo Alcantara (SUSE) <pc@manguebit.com> Signed-off-by: Thiago Rafael Becker <tbecker@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
* cifs: get rid of dead check in smb2_reconnect()Paulo Alcantara2023-03-301-1/+0
| | | | | | | | | The SMB2_IOCTL check in the switch statement will never be true as we return earlier from smb2_reconnect() if @smb2_command == SMB2_IOCTL. Signed-off-by: Paulo Alcantara (SUSE) <pc@manguebit.com> Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
* cifs: prevent infinite recursion in CIFSGetDFSRefer()Paulo Alcantara2023-03-301-2/+7
| | | | | | | | | | | We can't call smb_init() in CIFSGetDFSRefer() as cifs_reconnect_tcon() may end up calling CIFSGetDFSRefer() again to get new DFS referrals and thus causing an infinite recursion. Signed-off-by: Paulo Alcantara (SUSE) <pc@manguebit.com> Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com> Cc: stable@vger.kernel.org # 6.2 Signed-off-by: Steve French <stfrench@microsoft.com>
* cifs: avoid races in parallel reconnects in smb1Paulo Alcantara2023-03-301-6/+15
| | | | | | | | | | Prevent multiple threads of doing negotiate, session setup and tree connect by holding @ses->session_mutex in cifs_reconnect_tcon() while reconnecting session and tcon. Signed-off-by: Paulo Alcantara (SUSE) <pc@manguebit.com> Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
* cifs: fix DFS traversal oops without CONFIG_CIFS_DFS_UPCALLDavid Disseldorp2023-03-301-1/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When compiled with CONFIG_CIFS_DFS_UPCALL disabled, cifs_dfs_d_automount is NULL. cifs.ko logic for mapping CIFS_FATTR_DFS_REFERRAL attributes to S_AUTOMOUNT and corresponding dentry flags is retained regardless of CONFIG_CIFS_DFS_UPCALL, leading to a NULL pointer dereference in VFS follow_automount() when traversing a DFS referral link: BUG: kernel NULL pointer dereference, address: 0000000000000000 ... Call Trace: <TASK> __traverse_mounts+0xb5/0x220 ? cifs_revalidate_mapping+0x65/0xc0 [cifs] step_into+0x195/0x610 ? lookup_fast+0xe2/0xf0 path_lookupat+0x64/0x140 filename_lookup+0xc2/0x140 ? __create_object+0x299/0x380 ? kmem_cache_alloc+0x119/0x220 ? user_path_at_empty+0x31/0x50 user_path_at_empty+0x31/0x50 __x64_sys_chdir+0x2a/0xd0 ? exit_to_user_mode_prepare+0xca/0x100 do_syscall_64+0x42/0x90 entry_SYSCALL_64_after_hwframe+0x72/0xdc This fix adds an inline cifs_dfs_d_automount() {return -EREMOTE} handler when CONFIG_CIFS_DFS_UPCALL is disabled. An alternative would be to avoid flagging S_AUTOMOUNT, etc. without CONFIG_CIFS_DFS_UPCALL. This approach was chosen as it provides more control over the error path. Signed-off-by: David Disseldorp <ddiss@suse.de> Cc: stable@vger.kernel.org Reviewed-by: Paulo Alcantara (SUSE) <pc@manguebit.com> Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
* smb3: fix unusable share after force unmount failureSteve French2023-03-244-13/+11
| | | | | | | | | | | | | | | | | | | | | | If user does forced unmount ("umount -f") while files are still open on the share (as was seen in a Kubernetes example running on SMB3.1.1 mount) then we were marking the share as "TID_EXITING" in umount_begin() which caused all subsequent operations (except write) to fail ... but unfortunately when umount_begin() is called we do not know yet that there are open files or active references on the share that would prevent unmount from succeeding. Kubernetes had example when they were doing umount -f when files were open which caused the share to become unusable until the files were closed (and the umount retried). Fix this so that TID_EXITING is not set until we are about to send the tree disconnect (not at the beginning of forced umounts in umount_begin) so that if "umount -f" fails (due to open files or references) the mount is still usable. Cc: stable@vger.kernel.org Reviewed-by: Shyam Prasad N <sprasad@microsoft.com> Reviewed-by: Paulo Alcantara (SUSE) <pc@manguebit.com> Signed-off-by: Steve French <stfrench@microsoft.com>
* cifs: fix dentry lookups in directory handle cachePaulo Alcantara2023-03-241-2/+34
| | | | | | | | | | | | | | | | | | Get rid of any prefix paths in @path before lookup_positive_unlocked() as it will call ->lookup() which already adds those prefix paths through build_path_from_dentry(). This has caused a performance regression when mounting shares with a prefix path where readdir(2) would end up retrying several times to open bad directory names that contained duplicate prefix paths. Fix this by skipping any prefix paths in @path before calling lookup_positive_unlocked(). Fixes: e4029e072673 ("cifs: find and use the dentry for cached non-root directories also") Cc: stable@vger.kernel.org # 6.1+ Signed-off-by: Paulo Alcantara (SUSE) <pc@manguebit.com> Signed-off-by: Steve French <stfrench@microsoft.com>
* smb3: lower default deferred close timeout to address perf regressionSteve French2023-03-241-1/+1
| | | | | | | | | | | | | | | | | | | | | | Performance tests with large number of threads noted that the change of the default closetimeo (deferred close timeout between when close is done by application and when client has to send the close to the server), to 5 seconds from 1 second, significantly degraded perf in some cases like this (in the filebench example reported, the stats show close requests on the wire taking twice as long, and 50% regression in filebench perf). This is stil configurable via mount parm closetimeo, but to be safe, decrease default back to its previous value of 1 second. Reported-by: Yin Fengwei <fengwei.yin@intel.com> Reported-by: kernel test robot <yujie.liu@intel.com> Link: https://lore.kernel.org/lkml/997614df-10d4-af53-9571-edec36b0e2f3@intel.com/ Fixes: 5efdd9122eff ("smb3: allow deferred close timeout to be configurable") Cc: stable@vger.kernel.org # 6.0+ Tested-by: Yin Fengwei <fengwei.yin@intel.com> Reviewed-by: Paulo Alcantara (SUSE) <pc@manguebit.com> Reviewed-by: Shyam Prasad N <sprasad@microsoft.com> Signed-off-by: Steve French <stfrench@microsoft.com>
* cifs: fix missing unload_nls() in smb2_reconnect()Paulo Alcantara2023-03-241-3/+3
| | | | | | | | | Make sure to unload_nls() @nls_codepage if we no longer need it. Fixes: bc962159e8e3 ("cifs: avoid race conditions with parallel reconnects") Signed-off-by: Paulo Alcantara (SUSE) <pc@manguebit.com> Cc: Shyam Prasad N <sprasad@microsoft.com> Signed-off-by: Steve French <stfrench@microsoft.com>
* cifs: avoid race conditions with parallel reconnectsShyam Prasad N2023-03-243-33/+76
| | | | | | | | | | | | | | When multiple processes/channels do reconnects in parallel we used to return success immediately negotiate/session-setup/tree-connect, causing race conditions between processes that enter the function in parallel. This caused several errors related to session not found to show up during parallel reconnects. Signed-off-by: Shyam Prasad N <sprasad@microsoft.com> Reviewed-by: Paulo Alcantara (SUSE) <pc@manguebit.com> Cc: stable@vger.kernel.org Signed-off-by: Steve French <stfrench@microsoft.com>
* cifs: append path to open_enter trace eventShyam Prasad N2023-03-246-6/+25
| | | | | | | | | | | | | | | | We do not dump the file path for smb3_open_enter ftrace calls, which is a severe handicap while debugging using ftrace evens. This change adds that info. Unfortunately, we're not updating the path in open params in many places; which I had to do as a part of this change. SMB2_open gets path in utf16 format, but it's easier of path is supplied as char pointer in oparms. Signed-off-by: Shyam Prasad N <sprasad@microsoft.com> Reviewed-by: Paulo Alcantara (SUSE) <pc@manguebit.com> Cc: stable@vger.kernel.org Signed-off-by: Steve French <stfrench@microsoft.com>
* cifs: print session id while listing open filesShyam Prasad N2023-03-231-2/+3
| | | | | | | | | | | | | | In the output of /proc/fs/cifs/open_files, we only print the tree id for the tcon of each open file. It becomes difficult to know which tcon these files belong to with just the tree id. This change dumps ses id in addition to all other data today. Signed-off-by: Shyam Prasad N <sprasad@microsoft.com> Reviewed-by: Paulo Alcantara (SUSE) <pc@manguebit.com> Cc: stable@vger.kernel.org Signed-off-by: Steve French <stfrench@microsoft.com>
* cifs: dump pending mids for all channels in DebugDataShyam Prasad N2023-03-231-14/+27
| | | | | | | | | | | | | | | Currently, we only dump the pending mid information only on the primary channel in /proc/fs/cifs/DebugData. If multichannel is active, we do not print the pending MID list on secondary channels. This change will dump the pending mids for all the channels based on server->conn_id. Signed-off-by: Shyam Prasad N <sprasad@microsoft.com> Reviewed-by: Paulo Alcantara (SUSE) <pc@manguebit.com> Cc: stable@vger.kernel.org Signed-off-by: Steve French <stfrench@microsoft.com>
* cifs: empty interface list when server doesn't support query interfacesShyam Prasad N2023-03-231-1/+1
| | | | | | | | | | | When querying server interfaces returns -EOPNOTSUPP, clear the list of interfaces. Assumption is that multichannel would be disabled too. Signed-off-by: Shyam Prasad N <sprasad@microsoft.com> Reviewed-by: Paulo Alcantara (SUSE) <pc@manguebit.com> Cc: stable@vger.kernel.org Signed-off-by: Steve French <stfrench@microsoft.com>
* cifs: do not poll server interfaces too regularlyShyam Prasad N2023-03-231-0/+14
| | | | | | | | | | | | | | | We have the server interface list hanging off the tcon structure today for reasons unknown. So each tcon which is connected to a file server can query them separately, which is really unnecessary. To avoid this, in the query function, we will check the time of last update of the interface list, and avoid querying the server if it is within a certain range. Signed-off-by: Shyam Prasad N <sprasad@microsoft.com> Reviewed-by: Paulo Alcantara (SUSE) <pc@manguebit.com> Cc: stable@vger.kernel.org Signed-off-by: Steve French <stfrench@microsoft.com>
* cifs: lock chan_lock outside match_sessionShyam Prasad N2023-03-221-6/+7
| | | | | | | | | | | | | Coverity had rightly indicated a possible deadlock due to chan_lock being done inside match_session. All callers of match_* functions should pick up the necessary locks and call them. Signed-off-by: Shyam Prasad N <sprasad@microsoft.com> Reviewed-by: Paulo Alcantara (SUSE) <pc@manguebit.com> Cc: stable@vger.kernel.org Fixes: 724244cdb382 ("cifs: protect session channel fields with chan_lock") Signed-off-by: Steve French <stfrench@microsoft.com>
* cifs: check only tcon status on tcon related functionsShyam Prasad N2023-03-174-11/+19
| | | | | | | | | | We had a couple of checks for session in cifs_tree_connect and cifs_mark_open_files_invalid, which were unnecessary. And that was done with ses_lock. Changed that to tc_lock too. Signed-off-by: Shyam Prasad N <sprasad@microsoft.com> Reviewed-by: Paulo Alcantara (SUSE) <pc@manguebit.com> Signed-off-by: Steve French <stfrench@microsoft.com>
* cifs: use DFS root session instead of tcon sesPaulo Alcantara2023-03-141-0/+1
| | | | | | | | | | | | Use DFS root session whenever possible to get new DFS referrals otherwise we might end up with an IPC tcon (tcon->ses->tcon_ipc) that doesn't respond to them. It should be safe accessing @ses->dfs_root_ses directly in cifs_inval_name_dfs_link_error() as it has same lifetime as of @tcon. Signed-off-by: Paulo Alcantara (SUSE) <pc@manguebit.com> Cc: stable@vger.kernel.org # 6.2 Signed-off-by: Steve French <stfrench@microsoft.com>
* cifs: return DFS root session id in DebugDataPaulo Alcantara2023-03-141-0/+5
| | | | | | | | | | | | | | | | | | Return the DFS root session id in /proc/fs/cifs/DebugData to make it easier to track which IPC tcon was used to get new DFS referrals for a specific connection, and aids in debugging. A simple output of it would be Sessions: 1) Address: 192.168.1.13 Uses: 1 Capability: 0x300067 Session Status: 1 Security type: RawNTLMSSP SessionId: 0xd80000000009 User: 0 Cred User: 0 DFS root session id: 0x128006c000035 Signed-off-by: Paulo Alcantara (SUSE) <pc@manguebit.com> Cc: stable@vger.kernel.org # 6.2 Signed-off-by: Steve French <stfrench@microsoft.com>
* cifs: fix use-after-free bug in refresh_cache_worker()Paulo Alcantara2023-03-148-164/+67
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The UAF bug occurred because we were putting DFS root sessions in cifs_umount() while DFS cache refresher was being executed. Make DFS root sessions have same lifetime as DFS tcons so we can avoid the use-after-free bug is DFS cache refresher and other places that require IPCs to get new DFS referrals on. Also, get rid of mount group handling in DFS cache as we no longer need it. This fixes below use-after-free bug catched by KASAN [ 379.946955] BUG: KASAN: use-after-free in __refresh_tcon.isra.0+0x10b/0xc10 [cifs] [ 379.947642] Read of size 8 at addr ffff888018f57030 by task kworker/u4:3/56 [ 379.948096] [ 379.948208] CPU: 0 PID: 56 Comm: kworker/u4:3 Not tainted 6.2.0-rc7-lku #23 [ 379.948661] Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS rel-1.16.0-0-gd239552-rebuilt.opensuse.org 04/01/2014 [ 379.949368] Workqueue: cifs-dfscache refresh_cache_worker [cifs] [ 379.949942] Call Trace: [ 379.950113] <TASK> [ 379.950260] dump_stack_lvl+0x50/0x67 [ 379.950510] print_report+0x16a/0x48e [ 379.950759] ? __virt_addr_valid+0xd8/0x160 [ 379.951040] ? __phys_addr+0x41/0x80 [ 379.951285] kasan_report+0xdb/0x110 [ 379.951533] ? __refresh_tcon.isra.0+0x10b/0xc10 [cifs] [ 379.952056] ? __refresh_tcon.isra.0+0x10b/0xc10 [cifs] [ 379.952585] __refresh_tcon.isra.0+0x10b/0xc10 [cifs] [ 379.953096] ? __pfx___refresh_tcon.isra.0+0x10/0x10 [cifs] [ 379.953637] ? __pfx___mutex_lock+0x10/0x10 [ 379.953915] ? lock_release+0xb6/0x720 [ 379.954167] ? __pfx_lock_acquire+0x10/0x10 [ 379.954443] ? refresh_cache_worker+0x34e/0x6d0 [cifs] [ 379.954960] ? __pfx_wb_workfn+0x10/0x10 [ 379.955239] refresh_cache_worker+0x4ad/0x6d0 [cifs] [ 379.955755] ? __pfx_refresh_cache_worker+0x10/0x10 [cifs] [ 379.956323] ? __pfx_lock_acquired+0x10/0x10 [ 379.956615] ? read_word_at_a_time+0xe/0x20 [ 379.956898] ? lockdep_hardirqs_on_prepare+0x12/0x220 [ 379.957235] process_one_work+0x535/0x990 [ 379.957509] ? __pfx_process_one_work+0x10/0x10 [ 379.957812] ? lock_acquired+0xb7/0x5f0 [ 379.958069] ? __list_add_valid+0x37/0xd0 [ 379.958341] ? __list_add_valid+0x37/0xd0 [ 379.958611] worker_thread+0x8e/0x630 [ 379.958861] ? __pfx_worker_thread+0x10/0x10 [ 379.959148] kthread+0x17d/0x1b0 [ 379.959369] ? __pfx_kthread+0x10/0x10 [ 379.959630] ret_from_fork+0x2c/0x50 [ 379.959879] </TASK> Signed-off-by: Paulo Alcantara (SUSE) <pc@manguebit.com> Cc: stable@vger.kernel.org # 6.2 Signed-off-by: Steve French <stfrench@microsoft.com>
* cifs: set DFS root session in cifs_get_smb_ses()Paulo Alcantara2023-03-146-13/+13
| | | | | | | | | | Set the DFS root session pointer earlier when creating a new SMB session to prevent racing with smb2_reconnect(), cifs_reconnect_tcon() and DFS cache refresher. Signed-off-by: Paulo Alcantara (SUSE) <pc@manguebit.com> Cc: stable@vger.kernel.org # 6.2 Signed-off-by: Steve French <stfrench@microsoft.com>
* cifs: generate signkey for the channel that's reconnectingShyam Prasad N2023-03-141-1/+1
| | | | | | | | | | | | | Before my changes to how multichannel reconnects work, the primary channel was always used to do a non-binding session setup. With my changes, that is not the case anymore. Missed this place where channel at index 0 was forcibly updated with the signing key. Signed-off-by: Shyam Prasad N <sprasad@microsoft.com> Reviewed-by: Paulo Alcantara (SUSE) <pc@manguebit.com> Cc: stable@vger.kernel.org Signed-off-by: Steve French <stfrench@microsoft.com>
* cifs: Fix smb2_set_path_size()Volker Lendecke2023-03-141-7/+24
| | | | | | | | | | If cifs_get_writable_path() finds a writable file, smb2_compound_op() must use that file's FID and not the COMPOUND_FID. Cc: stable@vger.kernel.org Signed-off-by: Volker Lendecke <vl@samba.org> Reviewed-by: Paulo Alcantara (SUSE) <pc@manguebit.com> Signed-off-by: Steve French <stfrench@microsoft.com>
* cifs: Move the in_send statistic to __smb_send_rqst()Zhang Xiaoxu2023-03-051-12/+9
| | | | | | | | | | | | When send SMB_COM_NT_CANCEL and RFC1002_SESSION_REQUEST, the in_send statistic was lost. Let's move the in_send statistic to the send function to avoid this scenario. Fixes: 7ee1af765dfa ("[CIFS]") Signed-off-by: Zhang Xiaoxu <zhangxiaoxu5@huawei.com> Signed-off-by: Steve French <stfrench@microsoft.com>
* cifs: Fix memory leak in direct I/ODavid Howells2023-03-011-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When __cifs_readv() and __cifs_writev() extract pages from a user-backed iterator into a BVEC-type iterator, they set ->bv_need_unpin to note whether they need to unpin the pages later. However, in both cases they examine the BVEC-type iterator and not the source iterator - and so bv_need_unpin doesn't get set and the pages are leaked. I think this may be responsible for the generic/208 xfstest failing occasionally with: WARNING: CPU: 0 PID: 3064 at mm/gup.c:218 try_grab_page+0x65/0x100 RIP: 0010:try_grab_page+0x65/0x100 follow_page_pte+0x1a7/0x570 __get_user_pages+0x1a2/0x650 __gup_longterm_locked+0xdc/0xb50 internal_get_user_pages_fast+0x17f/0x310 pin_user_pages_fast+0x46/0x60 iov_iter_extract_pages+0xc9/0x510 ? __kmalloc_large_node+0xb1/0x120 ? __kmalloc_node+0xbe/0x130 netfs_extract_user_iter+0xbf/0x200 [netfs] __cifs_writev+0x150/0x330 [cifs] vfs_write+0x2a8/0x3c0 ksys_pwrite64+0x65/0xa0 with the page refcount going negative. This is less unlikely than it seems because the page is being pinned, not simply got, and so the refcount increased by 1024 each time, and so only needs to be called around ~2097152 for the refcount to go negative. Further, the test program (aio-dio-invalidate-failure) uses a 32MiB static buffer and all the PTEs covering it refer to the same page because it's never written to. The warning in try_grab_page(): if (WARN_ON_ONCE(folio_ref_count(folio) <= 0)) return -ENOMEM; then trips and prevents us ever using the page again for DIO at least. Fixes: d08089f649a0 ("cifs: Change the I/O paths to use an iterator rather than a page list") Reported-by: Murphy Zhou <jencce.kernel@gmail.com> Link: https://lore.kernel.org/r/CAH2r5mvaTsJ---n=265a4zqRA7pP+o4MJ36WCQUS6oPrOij8cw@mail.gmail.com Signed-off-by: David Howells <dhowells@redhat.com> Reviewed-by: Paulo Alcantara (SUSE) <pc@manguebit.com> cc: Shyam Prasad N <nspmangalore@gmail.com> cc: Rohith Surabattula <rohiths.msft@gmail.com> cc: Jeff Layton <jlayton@kernel.org> cc: linux-cifs@vger.kernel.org Signed-off-by: Steve French <stfrench@microsoft.com>
* cifs: prevent data race in cifs_reconnect_tcon()Paulo Alcantara2023-03-014-101/+69
| | | | | | | | | | | | | Make sure to get an up-to-date TCP_Server_Info::nr_targets value prior to waiting the server to be reconnected in cifs_reconnect_tcon(). It is set in cifs_tcp_ses_needs_reconnect() and protected by TCP_Server_Info::srv_lock. Create a new cifs_wait_for_server_reconnect() helper that can be used by both SMB2+ and CIFS reconnect code. Signed-off-by: Paulo Alcantara (SUSE) <pc@manguebit.com> Signed-off-by: Steve French <stfrench@microsoft.com>
* cifs: improve checking of DFS links over STATUS_OBJECT_NAME_INVALIDPaulo Alcantara2023-03-014-25/+106
| | | | | | | | | | | | | | | | | | | | Do not map STATUS_OBJECT_NAME_INVALID to -EREMOTE under non-DFS shares, or 'nodfs' mounts or CONFIG_CIFS_DFS_UPCALL=n builds. Otherwise, in the slow path, get a referral to figure out whether it is an actual DFS link. This could be simply reproduced under a non-DFS share by running the following $ mount.cifs //srv/share /mnt -o ... $ cat /mnt/$(printf '\U110000') cat: '/mnt/'$'\364\220\200\200': Object is remote Fixes: c877ce47e137 ("cifs: reduce roundtrips on create/qinfo requests") CC: stable@vger.kernel.org # 6.2 Signed-off-by: Paulo Alcantara (SUSE) <pc@manguebit.com> Reviewed-by: Ronnie Sahlberg <lsahlber@redhat.com> Signed-off-by: Steve French <stfrench@microsoft.com>
* cifs: Fix cifs_write_back_from_locked_folio()David Howells2023-03-011-0/+1
| | | | | | | | | | | | | | | | | | cifs_write_back_from_locked_folio() should return the number of bytes read, but returns the result of ->async_writev(), which will be 0 on success. As it happens, this doesn't prevent cifs_writepages_region() from working as it will then examine and ignore the pages that are no longer dirty rather than just skipping over them. Fixes: d08089f649a0 ("cifs: Change the I/O paths to use an iterator rather than a page list") Signed-off-by: David Howells <dhowells@redhat.com> cc: Shyam Prasad N <nspmangalore@gmail.com> cc: Rohith Surabattula <rohiths.msft@gmail.com> cc: Tom Talpey <tom@talpey.com> cc: Jeff Layton <jlayton@kernel.org> cc: linux-cifs@vger.kernel.org Reviewed-by: Paulo Alcantara (SUSE) <pc@manguebit.com> Signed-off-by: Steve French <stfrench@microsoft.com>
* cifs: reuse cifs_match_ipaddr for comparison of dstaddr tooShyam Prasad N2023-03-011-26/+2
| | | | | | | | | We have two pieces of code that does pretty much the same comparison. This change reuses cifs_match_ipaddr within match_address. Signed-off-by: Shyam Prasad N <sprasad@microsoft.com> Signed-off-by: Steve French <stfrench@microsoft.com>
* cifs: match even the scope id for ipv6 addressesShyam Prasad N2023-03-011-1/+2
| | | | | | | | | match_address function matches the scope id for ipv6 addresses, but cifs_match_ipaddr (which is another function used for comparison) does not use scope id. Doing so with this change. Signed-off-by: Shyam Prasad N <sprasad@microsoft.com> Signed-off-by: Steve French <stfrench@microsoft.com>
* cifs: Fix an uninitialised variableDavid Howells2023-03-011-1/+1
| | | | | | | | | | | | | | | | Fix an uninitialised variable introduced in cifs. Fixes: 3d78fe73fa12 ("cifs: Build the RDMA SGE list directly from an iterator") Signed-off-by: David Howells <dhowells@redhat.com> Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz> cc: Steve French <sfrench@samba.org> cc: Shyam Prasad N <nspmangalore@gmail.com> cc: Rohith Surabattula <rohiths.msft@gmail.com> cc: Tom Talpey <tom@talpey.com> cc: Jeff Layton <jlayton@kernel.org> cc: linux-cifs@vger.kernel.org cc: linux-rdma@vger.kernel.org Signed-off-by: Steve French <stfrench@microsoft.com>
* cifs: Add some missing xas_retry() callsDavid Howells2023-03-011-0/+6
| | | | | | | | | | | | | | | The xas_for_each loops added into fs/cifs/file.c need to go round again if indicated by xas_retry(). Fixes: b8713c4dbfa3 ("cifs: Add some helper functions") Signed-off-by: David Howells <dhowells@redhat.com> Reviewed-by: Paulo Alcantara (SUSE) <pc@cjr.nz> cc: Shyam Prasad N <nspmangalore@gmail.com> cc: Rohith Surabattula <rohiths.msft@gmail.com> cc: Tom Talpey <tom@talpey.com> cc: Jeff Layton <jlayton@kernel.org> cc: linux-cifs@vger.kernel.org Signed-off-by: Steve French <stfrench@microsoft.com>
* cifs: Fix cifs_writepages_region()David Howells2023-02-241-1/+2
| | | | | | | | | | | | | | | | | | | | Fix the cifs_writepages_region() to just jump over members of the batch that have been cleaned up rather than counting them as skipped. Unlike the other "skip_write" cases, this situation happens even for WB_SYNC_ALL, simply because the page has either been cleaned by somebody else, or was truncated. So in this case we're not "skipping" the write, we simply no longer need any write at all, so it's very different from the other skip_write cases. And we definitely shouldn't stop writing the rest just because of too many of these cases (or because we want to be rescheduled). Fixes: 3822a7c40997 ("Merge tag 'mm-stable-2023-02-20-13-37' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm") Signed-off-by: David Howells <dhowells@redhat.com> Link: https://lore.kernel.org/lkml/2213409.1677249075@warthog.procyon.org.uk/ Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge tag 'mm-stable-2023-02-20-13-37' of ↵Linus Torvalds2023-02-231-52/+66
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm Pull MM updates from Andrew Morton: - Daniel Verkamp has contributed a memfd series ("mm/memfd: add F_SEAL_EXEC") which permits the setting of the memfd execute bit at memfd creation time, with the option of sealing the state of the X bit. - Peter Xu adds a patch series ("mm/hugetlb: Make huge_pte_offset() thread-safe for pmd unshare") which addresses a rare race condition related to PMD unsharing. - Several folioification patch serieses from Matthew Wilcox, Vishal Moola, Sidhartha Kumar and Lorenzo Stoakes - Johannes Weiner has a series ("mm: push down lock_page_memcg()") which does perform some memcg maintenance and cleanup work. - SeongJae Park has added DAMOS filtering to DAMON, with the series "mm/damon/core: implement damos filter". These filters provide users with finer-grained control over DAMOS's actions. SeongJae has also done some DAMON cleanup work. - Kairui Song adds a series ("Clean up and fixes for swap"). - Vernon Yang contributed the series "Clean up and refinement for maple tree". - Yu Zhao has contributed the "mm: multi-gen LRU: memcg LRU" series. It adds to MGLRU an LRU of memcgs, to improve the scalability of global reclaim. - David Hildenbrand has added some userfaultfd cleanup work in the series "mm: uffd-wp + change_protection() cleanups". - Christoph Hellwig has removed the generic_writepages() library function in the series "remove generic_writepages". - Baolin Wang has performed some maintenance on the compaction code in his series "Some small improvements for compaction". - Sidhartha Kumar is doing some maintenance work on struct page in his series "Get rid of tail page fields". - David Hildenbrand contributed some cleanup, bugfixing and generalization of pte management and of pte debugging in his series "mm: support __HAVE_ARCH_PTE_SWP_EXCLUSIVE on all architectures with swap PTEs". - Mel Gorman and Neil Brown have removed the __GFP_ATOMIC allocation flag in the series "Discard __GFP_ATOMIC". - Sergey Senozhatsky has improved zsmalloc's memory utilization with his series "zsmalloc: make zspage chain size configurable". - Joey Gouly has added prctl() support for prohibiting the creation of writeable+executable mappings. The previous BPF-based approach had shortcomings. See "mm: In-kernel support for memory-deny-write-execute (MDWE)". - Waiman Long did some kmemleak cleanup and bugfixing in the series "mm/kmemleak: Simplify kmemleak_cond_resched() & fix UAF". - T.J. Alumbaugh has contributed some MGLRU cleanup work in his series "mm: multi-gen LRU: improve". - Jiaqi Yan has provided some enhancements to our memory error statistics reporting, mainly by presenting the statistics on a per-node basis. See the series "Introduce per NUMA node memory error statistics". - Mel Gorman has a second and hopefully final shot at fixing a CPU-hog regression in compaction via his series "Fix excessive CPU usage during compaction". - Christoph Hellwig does some vmalloc maintenance work in the series "cleanup vfree and vunmap". - Christoph Hellwig has removed block_device_operations.rw_page() in ths series "remove ->rw_page". - We get some maple_tree improvements and cleanups in Liam Howlett's series "VMA tree type safety and remove __vma_adjust()". - Suren Baghdasaryan has done some work on the maintainability of our vm_flags handling in the series "introduce vm_flags modifier functions". - Some pagemap cleanup and generalization work in Mike Rapoport's series "mm, arch: add generic implementation of pfn_valid() for FLATMEM" and "fixups for generic implementation of pfn_valid()" - Baoquan He has done some work to make /proc/vmallocinfo and /proc/kcore better represent the real state of things in his series "mm/vmalloc.c: allow vread() to read out vm_map_ram areas". - Jason Gunthorpe rationalized the GUP system's interface to the rest of the kernel in the series "Simplify the external interface for GUP". - SeongJae Park wishes to migrate people from DAMON's debugfs interface over to its sysfs interface. To support this, we'll temporarily be printing warnings when people use the debugfs interface. See the series "mm/damon: deprecate DAMON debugfs interface". - Andrey Konovalov provided the accurately named "lib/stackdepot: fixes and clean-ups" series. - Huang Ying has provided a dramatic reduction in migration's TLB flush IPI rates with the series "migrate_pages(): batch TLB flushing". - Arnd Bergmann has some objtool fixups in "objtool warning fixes". * tag 'mm-stable-2023-02-20-13-37' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (505 commits) include/linux/migrate.h: remove unneeded externs mm/memory_hotplug: cleanup return value handing in do_migrate_range() mm/uffd: fix comment in handling pte markers mm: change to return bool for isolate_movable_page() mm: hugetlb: change to return bool for isolate_hugetlb() mm: change to return bool for isolate_lru_page() mm: change to return bool for folio_isolate_lru() objtool: add UACCESS exceptions for __tsan_volatile_read/write kmsan: disable ftrace in kmsan core code kasan: mark addr_has_metadata __always_inline mm: memcontrol: rename memcg_kmem_enabled() sh: initialize max_mapnr m68k/nommu: add missing definition of ARCH_PFN_OFFSET mm: percpu: fix incorrect size in pcpu_obj_full_size() maple_tree: reduce stack usage with gcc-9 and earlier mm: page_alloc: call panic() when memoryless node allocation fails mm: multi-gen LRU: avoid futile retries migrate_pages: move THP/hugetlb migration support check to simplify code migrate_pages: batch flushing TLB migrate_pages: share more code between _unmap and _move ...
| * fs: convert writepage_t callback to pass a folioMatthew Wilcox (Oracle)2023-02-021-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Patch series "Convert writepage_t to use a folio". More folioisation. I split out the mpage work from everything else because it completely dominated the patch, but some implementations I just converted outright. This patch (of 2): We always write back an entire folio, but that's currently passed as the head page. Convert all filesystems that use write_cache_pages() to expect a folio instead of a page. Link: https://lkml.kernel.org/r/20230126201255.1681189-1-willy@infradead.org Link: https://lkml.kernel.org/r/20230126201255.1681189-2-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org> Cc: Christoph Hellwig <hch@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
| * cifs: convert wdata_alloc_and_fillpages() to use filemap_get_folios_tag()Vishal Moola (Oracle)2023-02-021-3/+29
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This is in preparation for the removal of find_get_pages_range_tag(). Now also supports the use of large folios. Since tofind might be larger than the max number of folios in a folio_batch (15), we loop through filling in wdata->pages pulling more batches until we either reach tofind pages or run out of folios. This function may not return all pages in the last found folio before tofind pages are reached. Link: https://lkml.kernel.org/r/20230104211448.4804-10-vishal.moola@gmail.com Signed-off-by: Vishal Moola (Oracle) <vishal.moola@gmail.com> Acked-by: Paulo Alcantara (SUSE) <pc@cjr.nz> Cc: Tom Talpey <tom@talpey.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
* | Merge tag '6.3-rc-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6Linus Torvalds2023-02-2233-2280/+2228
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull cifs client updates from Steve French: "The largest subset of this is from David Howells et al: making the cifs/smb3 driver pass iov_iters down to the lowest layers, directly to the network transport rather than passing lists of pages around, helping multiple areas: - Pin user pages, thereby fixing the race between concurrent DIO read and fork, where the pages containing the DIO read buffer may end up belonging to the child process and not the parent - with the result that the parent might not see the retrieved data. - cifs shouldn't take refs on pages extracted from non-user-backed iterators (eg. KVEC). With these changes, cifs will apply the appropriate cleanup. - Making it easier to transition to using folios in cifs rather than pages by dealing with them through BVEC and XARRAY iterators. - Allowing cifs to use the new splice function The remainder are: - fixes for stable, including various fixes for uninitialized memory, wrong length field causing mount issue to very old servers, important directory lease fixes and reconnect fixes - cleanups (unused code removal, change one element array usage, and a change form strtobool to kstrtobool, and Kconfig cleanups) - SMBDIRECT (RDMA) fixes including iov_iter integration and UAF fixes - reconnect fixes - multichannel fixes, including improving channel allocation (to least used channel) - remove the last use of lock_page_killable by moving to folio_lock_killable" * tag '6.3-rc-smb3-client-fixes' of git://git.samba.org/sfrench/cifs-2.6: (46 commits) update internal module version number for cifs.ko cifs: update ip_addr for ses only for primary chan setup cifs: use tcon allocation functions even for dummy tcon cifs: use the least loaded channel for sending requests cifs: DIO to/from KVEC-type iterators should now work cifs: Remove unused code cifs: Build the RDMA SGE list directly from an iterator cifs: Change the I/O paths to use an iterator rather than a page list cifs: Add a function to read into an iter from a socket cifs: Add some helper functions cifs: Add a function to Hash the contents of an iterator cifs: Add a function to build an RDMA SGE list from an iterator netfs: Add a function to extract an iterator into a scatterlist netfs: Add a function to extract a UBUF or IOVEC into a BVEC iterator cifs: Implement splice_read to pass down ITER_BVEC not ITER_PIPE splice: Export filemap/direct_splice_read() iov_iter: Add a function to extract a page list from an iterator iov_iter: Define flags to qualify page extraction. splice: Add a func to do a splice from an O_DIRECT file without ITER_PIPE splice: Add a func to do a splice from a buffered file without ITER_PIPE ...
generated by cgit v1.2.3 (git 2.25.1) at 2025-03-19 10:51:44 +0000