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
..
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_negtokeninit.asn1	cifs: decoding negTokenInit with generic ASN1 decoder	2021-06-20 21:28:17 -05:00
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_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_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
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
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
Kconfig	cifs: fix indentation in make menuconfig options	2023-02-20 11:48:47 -06:00
link.c	cifs: Fix uninitialized memory reads for oparms.mode	2023-02-20 11:48:48 -06:00
Makefile	cifs: get rid of mount options string parsing	2022-12-19 08:03:11 -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