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OpenCloudOS-Kernel/fs/cifs
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David Howells 4e260a8fd7 cifs: Implement splice_read to pass down ITER_BVEC not ITER_PIPE 
Provide cifs_splice_read() to use a bvec rather than an pipe iterator as
the latter cannot so easily be split and advanced, which is necessary to
pass an iterator down to the bottom levels.  Upstream cifs gets around this
problem by using iov_iter_get_pages() to prefill the pipe and then passing
the list of pages down.

This is done by:

 (1) Bulk-allocate a bunch of pages to carry as much of the requested
     amount of data as possible, but without overrunning the available
     slots in the pipe and add them to an ITER_BVEC.

 (2) Synchronously call ->read_iter() to read into the buffer.

 (3) Discard any unused pages.

 (4) Load the remaining pages into the pipe in order and advance the head
     pointer.

Signed-off-by: David Howells <dhowells@redhat.com>
cc: Steve French <sfrench@samba.org>
cc: Shyam Prasad N <nspmangalore@gmail.com>
cc: Rohith Surabattula <rohiths.msft@gmail.com>
cc: Jeff Layton <jlayton@kernel.org>
cc: Al Viro <viro@zeniv.linux.org.uk>
cc: linux-cifs@vger.kernel.org

Link: https://lore.kernel.org/r/166732028113.3186319.1793644937097301358.stgit@warthog.procyon.org.uk/ # rfc
Signed-off-by: Steve French <stfrench@microsoft.com>
 		2023-02-20 17:25:43 -06:00
..
Kconfig cifs: fix indentation in make menuconfig options 2023-02-20 11:48:47 -06:00
Makefile cifs: get rid of mount options string parsing 2022-12-19 08:03:11 -06:00
asn1.c cifs: decoding negTokenInit with generic ASN1 decoder 2021-06-20 21:28:17 -05:00
cached_dir.c cifs: return a single-use cfid if we did not get a lease 2023-02-20 11:48:48 -06:00
cached_dir.h cifs: drop the lease for cached directories on rmdir or rename 2022-10-19 17:57:41 -05:00
cifs_debug.c cifs: print last update time for interface list 2023-02-20 11:48:47 -06:00
cifs_debug.h smb3: add dynamic trace points for tree disconnect 2022-10-05 01:31:18 -05:00
cifs_dfs_ref.c cifs: use origin fullpath for automounts 2022-12-19 08:03:12 -06:00
cifs_fs_sb.h cifs: support nested dfs links over reconnect 2021-11-10 16:30:13 -06:00
cifs_ioctl.h cifs: minor cleanup of some headers 2022-12-12 13:08:06 -06:00
cifs_spnego.c cred: Do not default to init_cred in prepare_kernel_cred() 2022-11-01 10:04:52 -07:00
cifs_spnego.h cifs: Replace remaining 1-element arrays 2023-02-20 11:48:48 -06:00
cifs_spnego_negtokeninit.asn1 cifs: decoding negTokenInit with generic ASN1 decoder 2021-06-20 21:28:17 -05:00
cifs_swn.c smb3: add dynamic trace points for tree disconnect 2022-10-05 01:31:18 -05:00
cifs_swn.h cifs: simplify SWN code with dummy funcs instead of ifdefs 2021-04-25 16:28:22 -05:00
cifs_unicode.c cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
cifs_unicode.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
cifs_uniupr.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 156 2019-05-30 11:26:35 -07:00
cifsacl.c cifs: Fix uninitialized memory reads for oparms.mode 2023-02-20 11:48:48 -06:00
cifsacl.h cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
cifsencrypt.c cifs: fix potential memory leaks in session setup 2023-01-10 23:24:37 -06:00
cifsfs.c cifs: Implement splice_read to pass down ITER_BVEC not ITER_PIPE 2023-02-20 17:25:43 -06:00
cifsfs.h cifs: Implement splice_read to pass down ITER_BVEC not ITER_PIPE 2023-02-20 17:25:43 -06:00
cifsglob.h cifs: get rid of dns resolve worker 2023-02-20 17:25:43 -06:00
cifspdu.h cifs: Replace remaining 1-element arrays 2023-02-20 11:48:48 -06:00
cifsproto.h cifs: use origin fullpath for automounts 2022-12-19 08:03:12 -06:00
cifsroot.c cifs: move from strlcpy with unused retval to strscpy 2022-08-19 11:02:26 -05:00
cifssmb.c cifs: Convert struct fealist away from 1-element array 2023-02-20 11:48:48 -06:00
connect.c cifs: get rid of dns resolve worker 2023-02-20 17:25:43 -06:00
dfs.c cifs: protect access of TCP_Server_Info::{dstaddr,hostname} 2023-01-04 09:06:53 -06:00
dfs.h cifs: use origin fullpath for automounts 2022-12-19 08:03:12 -06:00
dfs_cache.c cifs: remove unused function 2023-01-18 14:49:51 -06:00
dfs_cache.h cifs: remove unused function 2023-01-18 14:49:51 -06:00
dir.c cifs: Fix uninitialized memory reads for oparms.mode 2023-02-20 11:48:48 -06:00
dns_resolve.c cifs: set resolved ip in sockaddr 2022-12-19 08:03:11 -06:00
dns_resolve.h cifs: set resolved ip in sockaddr 2022-12-19 08:03:11 -06:00
export.c cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
file.c cifs: Implement splice_read to pass down ITER_BVEC not ITER_PIPE 2023-02-20 17:25:43 -06:00
fs_context.c cifs: share dfs connections and supers 2022-12-19 08:03:12 -06:00
fs_context.h cifs: share dfs connections and supers 2022-12-19 08:03:12 -06:00
fscache.c use less confusing names for iov_iter direction initializers 2022-11-25 13:01:55 -05:00
fscache.h cifs: Remove {cifs,nfs}_fscache_release_page() 2022-08-10 21:26:08 -05:00
inode.c cifs: Fix uninitialized memory reads for oparms.mode 2023-02-20 11:48:48 -06:00
ioctl.c cifs: Fix wrong return value checking when GETFLAGS 2022-11-16 00:21:04 -06:00
link.c cifs: Fix uninitialized memory reads for oparms.mode 2023-02-20 11:48:48 -06:00
misc.c cifs: protect access of TCP_Server_Info::{dstaddr,hostname} 2023-01-04 09:06:53 -06:00
netlink.c genetlink: start to validate reserved header bytes 2022-08-29 12:47:15 +01:00
netlink.h cifs: Register generic netlink family 2020-12-14 09:16:22 -06:00
netmisc.c cifs: remove unused server parameter from calc_smb_size() 2022-08-17 18:07:13 -05:00
nterr.c treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
nterr.h treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 61 2019-05-24 17:36:45 +02:00
ntlmssp.h cifs: Replace zero-length arrays with flexible-array members 2023-02-20 11:48:47 -06:00
readdir.c cifs: Replace remaining 1-element arrays 2023-02-20 11:48:48 -06:00
rfc1002pdu.h cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
sess.c cifs: get rid of dns resolve worker 2023-02-20 17:25:43 -06:00
smb1ops.c cifs: Fix uninitialized memory reads for oparms.mode 2023-02-20 11:48:48 -06:00
smb2file.c smb3: Replace smb2pdu 1-element arrays with flex-arrays 2023-02-20 17:25:43 -06:00
smb2glob.h smb3: move defines for ioctl protocol header and SMB2 sizes to smbfs_common 2022-03-26 23:09:20 -05:00
smb2inode.c cifs: Fix uninitialized memory reads for oparms.mode 2023-02-20 11:48:48 -06:00
smb2maperror.c cifs: Create a new shared file holding smb2 pdu definitions 2021-11-05 09:50:57 -05:00
smb2misc.c smb3: Replace smb2pdu 1-element arrays with flex-arrays 2023-02-20 17:25:43 -06:00
smb2ops.c smb3: Replace smb2pdu 1-element arrays with flex-arrays 2023-02-20 17:25:43 -06:00
smb2pdu.c smb3: Replace smb2pdu 1-element arrays with flex-arrays 2023-02-20 17:25:43 -06:00
smb2pdu.h smb3: Replace smb2pdu 1-element arrays with flex-arrays 2023-02-20 17:25:43 -06:00
smb2proto.h cifs: Parse owner/group for stat in smb311 posix extensions 2022-12-08 09:51:53 -06:00
smb2status.h cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
smb2transport.c cifs: avoid unnecessary iteration of tcp sessions 2022-11-04 23:34:40 -05:00
smbdirect.c cifs: Fix warning and UAF when destroy the MR list 2023-02-20 11:48:48 -06:00
smbdirect.h Decrease the number of SMB3 smbdirect client SGEs 2022-10-05 01:29:21 -05:00
smbencrypt.c cifs: rename cifs_common to smbfs_common 2021-09-08 23:59:26 -05:00
smberr.h cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
trace.c smb3: Cleanup license mess 2019-01-24 09:37:33 -06:00
trace.h smb3: add dynamic trace points for tree disconnect 2022-10-05 01:31:18 -05:00
transport.c use less confusing names for iov_iter direction initializers 2022-11-25 13:01:55 -05:00
unc.c cifs: don't cargo-cult strndup() 2021-04-25 16:28:23 -05:00
winucase.c cifs: remove pathname for file from SPDX header 2021-09-13 14:51:10 -05:00
xattr.c cifs: use stub posix acl handlers 2022-10-20 10:13:32 +02:00