mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-24 07:40:53 +07:00
[CIFS] Add in some missing flags and cifs README and TODO corrections
Signed-off-by: Steve French <sfrench@us.ibm.com>
This commit is contained in:
Steve French
parent
75154f402e
commit
75865f8cc8
@ -8,7 +8,10 @@ when Unix Extensions were ignored). This allows users to override the
|
||||
default uid and gid for files when they are certain that the uids or
|
||||
gids on the server do not match those of the client. Make "sec=none"
|
||||
mount override username (so that null user connection is attempted)
|
||||
to match what documentation said.
|
||||
to match what documentation said. Support for very large reads, over 127K,
|
||||
available to some newer servers (such as Samba 3.0.26 and later but
|
||||
note that it also requires setting CIFSMaxBufSize at module install
|
||||
time to a larger value which may hurt performance in some cases).
|
||||
|
||||
Version 1.48
|
||||
------------
|
||||
|
||||
@ -301,10 +301,21 @@ A partial list of the supported mount options follows:
|
||||
during the local client kernel build will be used.
|
||||
If server does not support Unicode, this parameter is
|
||||
unused.
|
||||
rsize default read size (usually 16K)
|
||||
wsize default write size (usually 16K, 32K is often better over GigE)
|
||||
maximum wsize currently allowed by CIFS is 57344 (14 4096 byte
|
||||
pages)
|
||||
rsize default read size (usually 16K). The client currently
|
||||
can not use rsize larger than CIFSMaxBufSize. CIFSMaxBufSize
|
||||
defaults to 16K and may be changed (from 8K to the maximum
|
||||
kmalloc size allowed by your kernel) at module install time
|
||||
for cifs.ko. Setting CIFSMaxBufSize to a very large value
|
||||
will cause cifs to use more memory and may reduce performance
|
||||
in some cases. To use rsize greater than 127K (the original
|
||||
cifs protocol maximum) also requires that the server support
|
||||
a new Unix Capability flag (for very large read) which some
|
||||
newer servers (e.g. Samba 3.0.26 or later) do. rsize can be
|
||||
set from a minimum of 2048 to a maximum of 130048 (127K or
|
||||
CIFSMaxBufSize, whichever is smaller)
|
||||
wsize default write size (default 57344)
|
||||
maximum wsize currently allowed by CIFS is 57344 (fourteen
|
||||
4096 byte pages)
|
||||
rw mount the network share read-write (note that the
|
||||
server may still consider the share read-only)
|
||||
ro mount network share read-only
|
||||
@ -582,10 +593,10 @@ the start of smb requests and responses can be enabled via:
|
||||
|
||||
echo 1 > /proc/fs/cifs/traceSMB
|
||||
|
||||
Two other experimental features are under development and to test
|
||||
require enabling CONFIG_CIFS_EXPERIMENTAL
|
||||
Two other experimental features are under development. To test these
|
||||
requires enabling CONFIG_CIFS_EXPERIMENTAL
|
||||
|
||||
More efficient write operations
|
||||
ipv6 enablement
|
||||
|
||||
DNOTIFY fcntl: needed for support of directory change
|
||||
notification and perhaps later for file leases)
|
||||
|
||||
@ -106,6 +106,12 @@ but recognizes them
|
||||
succeed but still return access denied (appears to be Windows
|
||||
server not cifs client problem) and has not been reproduced recently.
|
||||
NTFS partitions do not have this problem.
|
||||
4) Unix/POSIX capabilities are reset after reconnection, and affect
|
||||
a few fields in the tree connection but we do do not know which
|
||||
superblocks to apply these changes to. We should probably walk
|
||||
the list of superblocks to set these. Also need to check the
|
||||
flags on the second mount to the same share, and see if we
|
||||
can do the same trick that NFS does to remount duplicate shares.
|
||||
|
||||
Misc testing to do
|
||||
==================
|
||||
|
||||
@ -712,6 +712,7 @@ typedef struct smb_com_findclose_req {
|
||||
#define REQ_OPLOCK 0x00000002
|
||||
#define REQ_BATCHOPLOCK 0x00000004
|
||||
#define REQ_OPENDIRONLY 0x00000008
|
||||
#define REQ_EXTENDED_INFO 0x00000010
|
||||
|
||||
typedef struct smb_com_open_req { /* also handles create */
|
||||
struct smb_hdr hdr; /* wct = 24 */
|
||||
@ -1885,15 +1886,19 @@ typedef struct {
|
||||
#define CIFS_UNIX_POSIX_PATHNAMES_CAP 0x00000010 /* Allow POSIX path chars */
|
||||
#define CIFS_UNIX_POSIX_PATH_OPS_CAP 0x00000020 /* Allow new POSIX path based
|
||||
calls including posix open
|
||||
and posix unlink */
|
||||
and posix unlink */
|
||||
#define CIFS_UNIX_LARGE_READ_CAP 0x00000040 /* support reads >128K (up
|
||||
to 0xFFFF00 */
|
||||
#define CIFS_UNIX_LARGE_WRITE_CAP 0x00000080
|
||||
|
||||
#ifdef CONFIG_CIFS_POSIX
|
||||
/* Can not set pathnames cap yet until we send new posix create SMB since
|
||||
otherwise server can treat such handles opened with older ntcreatex
|
||||
(by a new client which knows how to send posix path ops)
|
||||
as non-posix handles (can affect write behavior with byte range locks.
|
||||
We can add back in POSIX_PATH_OPS cap when Posix Create/Mkdir finished */
|
||||
/* #define CIFS_UNIX_CAP_MASK 0x0000003b */
|
||||
#define CIFS_UNIX_CAP_MASK 0x0000001b
|
||||
/* #define CIFS_UNIX_CAP_MASK 0x000000fb */
|
||||
#define CIFS_UNIX_CAP_MASK 0x000000db
|
||||
#else
|
||||
#define CIFS_UNIX_CAP_MASK 0x00000013
|
||||
#endif /* CONFIG_CIFS_POSIX */
|
||||
|
||||
@ -1,7 +1,7 @@
|
||||
/*
|
||||
* fs/cifs/connect.c
|
||||
*
|
||||
* Copyright (C) International Business Machines Corp., 2002,2006
|
||||
* Copyright (C) International Business Machines Corp., 2002,2007
|
||||
* Author(s): Steve French (sfrench@us.ibm.com)
|
||||
*
|
||||
* This library is free software; you can redistribute it and/or modify
|
||||
@ -1650,19 +1650,19 @@ void reset_cifs_unix_caps(int xid, struct cifsTconInfo * tcon,
|
||||
}
|
||||
|
||||
cap &= CIFS_UNIX_CAP_MASK;
|
||||
if(vol_info && vol_info->no_psx_acl)
|
||||
if (vol_info && vol_info->no_psx_acl)
|
||||
cap &= ~CIFS_UNIX_POSIX_ACL_CAP;
|
||||
else if(CIFS_UNIX_POSIX_ACL_CAP & cap) {
|
||||
else if (CIFS_UNIX_POSIX_ACL_CAP & cap) {
|
||||
cFYI(1,("negotiated posix acl support"));
|
||||
if(sb)
|
||||
sb->s_flags |= MS_POSIXACL;
|
||||
}
|
||||
|
||||
if(vol_info && vol_info->posix_paths == 0)
|
||||
if (vol_info && vol_info->posix_paths == 0)
|
||||
cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP;
|
||||
else if(cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
|
||||
else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) {
|
||||
cFYI(1,("negotiate posix pathnames"));
|
||||
if(sb)
|
||||
if (sb)
|
||||
CIFS_SB(sb)->mnt_cifs_flags |=
|
||||
CIFS_MOUNT_POSIX_PATHS;
|
||||
}
|
||||
@ -1670,21 +1670,35 @@ void reset_cifs_unix_caps(int xid, struct cifsTconInfo * tcon,
|
||||
/* We might be setting the path sep back to a different
|
||||
form if we are reconnecting and the server switched its
|
||||
posix path capability for this share */
|
||||
if(sb && (CIFS_SB(sb)->prepathlen > 0))
|
||||
if (sb && (CIFS_SB(sb)->prepathlen > 0))
|
||||
CIFS_SB(sb)->prepath[0] = CIFS_DIR_SEP(CIFS_SB(sb));
|
||||
|
||||
if (sb && (CIFS_SB(sb)->rsize > 127 * 1024)) {
|
||||
if ((cap & CIFS_UNIX_LARGE_READ_CAP) == 0) {
|
||||
CIFS_SB(sb)->rsize = 127 * 1024;
|
||||
#ifdef CONFIG_CIFS_DEBUG2
|
||||
cFYI(1,("larger reads not supported by srv"));
|
||||
#endif
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
cFYI(1,("Negotiate caps 0x%x",(int)cap));
|
||||
#ifdef CONFIG_CIFS_DEBUG2
|
||||
if(cap & CIFS_UNIX_FCNTL_CAP)
|
||||
if (cap & CIFS_UNIX_FCNTL_CAP)
|
||||
cFYI(1,("FCNTL cap"));
|
||||
if(cap & CIFS_UNIX_EXTATTR_CAP)
|
||||
if (cap & CIFS_UNIX_EXTATTR_CAP)
|
||||
cFYI(1,("EXTATTR cap"));
|
||||
if(cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
|
||||
if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP)
|
||||
cFYI(1,("POSIX path cap"));
|
||||
if(cap & CIFS_UNIX_XATTR_CAP)
|
||||
if (cap & CIFS_UNIX_XATTR_CAP)
|
||||
cFYI(1,("XATTR cap"));
|
||||
if(cap & CIFS_UNIX_POSIX_ACL_CAP)
|
||||
if (cap & CIFS_UNIX_POSIX_ACL_CAP)
|
||||
cFYI(1,("POSIX ACL cap"));
|
||||
if (cap & CIFS_UNIX_LARGE_READ_CAP)
|
||||
cFYI(1,("very large read cap"));
|
||||
if (cap & CIFS_UNIX_LARGE_WRITE_CAP)
|
||||
cFYI(1,("very large write cap"));
|
||||
#endif /* CIFS_DEBUG2 */
|
||||
if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) {
|
||||
cFYI(1,("setting capabilities failed"));
|
||||
@ -1935,13 +1949,14 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
|
||||
cERROR(1,("rsize %d too large, using MaxBufSize",
|
||||
volume_info.rsize));
|
||||
cifs_sb->rsize = CIFSMaxBufSize;
|
||||
} else if((volume_info.rsize) && (volume_info.rsize <= CIFSMaxBufSize))
|
||||
} else if ((volume_info.rsize) &&
|
||||
(volume_info.rsize <= CIFSMaxBufSize))
|
||||
cifs_sb->rsize = volume_info.rsize;
|
||||
else /* default */
|
||||
cifs_sb->rsize = CIFSMaxBufSize;
|
||||
|
||||
if (volume_info.wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) {
|
||||
cERROR(1,("wsize %d too large using 4096 instead",
|
||||
cERROR(1,("wsize %d too large, using 4096 instead",
|
||||
volume_info.wsize));
|
||||
cifs_sb->wsize = 4096;
|
||||
} else if (volume_info.wsize)
|
||||
@ -1960,7 +1975,7 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
|
||||
if (cifs_sb->rsize < 2048) {
|
||||
cifs_sb->rsize = 2048;
|
||||
/* Windows ME may prefer this */
|
||||
cFYI(1,("readsize set to minimum 2048"));
|
||||
cFYI(1,("readsize set to minimum: 2048"));
|
||||
}
|
||||
/* calculate prepath */
|
||||
cifs_sb->prepath = volume_info.prepath;
|
||||
@ -2116,7 +2131,13 @@ cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb,
|
||||
/* tell server which Unix caps we support */
|
||||
if (tcon->ses->capabilities & CAP_UNIX)
|
||||
reset_cifs_unix_caps(xid, tcon, sb, &volume_info);
|
||||
|
||||
else if(cifs_sb->rsize > (1024 * 127)) {
|
||||
cifs_sb->rsize = 1024 * 127;
|
||||
#ifdef CONFIG_CIFS_DEBUG2
|
||||
cFYI(1,("no very large read support, rsize 127K"));
|
||||
#endif
|
||||
|
||||
}
|
||||
if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X))
|
||||
cifs_sb->wsize = min(cifs_sb->wsize,
|
||||
(tcon->ses->server->maxBuf -
|
||||
|
||||
@ -1720,7 +1720,9 @@ static int cifs_readpages(struct file *file, struct address_space *mapping,
|
||||
pTcon = cifs_sb->tcon;
|
||||
|
||||
pagevec_init(&lru_pvec, 0);
|
||||
|
||||
#ifdef CONFIG_CIFS_DEBUG2
|
||||
cFYI(1,("rpages: num pages %d", num_pages));
|
||||
#endif
|
||||
for (i = 0; i < num_pages; ) {
|
||||
unsigned contig_pages;
|
||||
struct page *tmp_page;
|
||||
@ -1753,7 +1755,10 @@ static int cifs_readpages(struct file *file, struct address_space *mapping,
|
||||
/* Read size needs to be in multiples of one page */
|
||||
read_size = min_t(const unsigned int, read_size,
|
||||
cifs_sb->rsize & PAGE_CACHE_MASK);
|
||||
|
||||
#ifdef CONFIG_CIFS_DEBUG2
|
||||
cFYI(1,("rpages: read size 0x%x contiguous pages %d",
|
||||
read_size, contig_pages));
|
||||
#endif
|
||||
rc = -EAGAIN;
|
||||
while (rc == -EAGAIN) {
|
||||
if ((open_file->invalidHandle) &&
|
||||
|
||||
Loading…
Reference in New Issue
Block a user