| 1 | '\" t
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| 2 | .\" Title: vfs_gpfs
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| 3 | .\" Author: [see the "AUTHOR" section]
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| 4 | .\" Generator: DocBook XSL Stylesheets v1.78.1 <http://docbook.sf.net/>
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| 5 | .\" Date: 10/25/2016
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| 6 | .\" Manual: System Administration tools
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| 7 | .\" Source: Samba 4.4
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| 8 | .\" Language: English
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| 9 | .\"
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| 10 | .TH "VFS_GPFS" "8" "10/25/2016" "Samba 4\&.4" "System Administration tools"
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| 11 | .\" -----------------------------------------------------------------
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| 12 | .\" * Define some portability stuff
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| 13 | .\" -----------------------------------------------------------------
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| 14 | .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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| 15 | .\" http://bugs.debian.org/507673
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| 16 | .\" http://lists.gnu.org/archive/html/groff/2009-02/msg00013.html
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| 17 | .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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| 18 | .ie \n(.g .ds Aq \(aq
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| 19 | .el .ds Aq '
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| 20 | .\" -----------------------------------------------------------------
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| 21 | .\" * set default formatting
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| 22 | .\" -----------------------------------------------------------------
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| 23 | .\" disable hyphenation
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| 24 | .nh
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| 25 | .\" disable justification (adjust text to left margin only)
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| 26 | .ad l
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| 27 | .\" -----------------------------------------------------------------
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| 28 | .\" * MAIN CONTENT STARTS HERE *
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| 29 | .\" -----------------------------------------------------------------
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| 30 | .SH "NAME"
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| 31 | vfs_gpfs \- gpfs specific samba extensions like acls and prealloc
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| 32 | .SH "SYNOPSIS"
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| 33 | .HP \w'\ 'u
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| 34 | vfs objects = gpfs
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| 35 | .SH "DESCRIPTION"
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| 36 | .PP
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| 37 | This VFS module is part of the
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| 38 | \fBsamba\fR(7)
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| 39 | suite\&.
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| 40 | .PP
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| 41 | The
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| 42 | gpfs
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| 43 | VFS module is the home for all gpfs extensions that Samba requires for proper integration with GPFS\&. It uses the GPL library interfaces provided by GPFS\&.
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| 44 | .PP
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| 45 | Currently the gpfs vfs module provides extensions in following areas :
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| 46 | .sp
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| 47 | .RS 4
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| 48 | .ie n \{\
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| 49 | \h'-04'\(bu\h'+03'\c
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| 50 | .\}
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| 51 | .el \{\
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| 52 | .sp -1
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| 53 | .IP \(bu 2.3
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| 54 | .\}
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| 55 | NFSv4 ACL Interfaces with configurable options for GPFS
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| 56 | .RE
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| 57 | .sp
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| 58 | .RS 4
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| 59 | .ie n \{\
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| 60 | \h'-04'\(bu\h'+03'\c
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| 61 | .\}
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| 62 | .el \{\
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| 63 | .sp -1
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| 64 | .IP \(bu 2.3
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| 65 | .\}
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| 66 | Kernel oplock support on GPFS
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| 67 | .RE
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| 68 | .sp
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| 69 | .RS 4
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| 70 | .ie n \{\
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| 71 | \h'-04'\(bu\h'+03'\c
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| 72 | .\}
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| 73 | .el \{\
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| 74 | .sp -1
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| 75 | .IP \(bu 2.3
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| 76 | .\}
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| 77 | Lease support on GPFS
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| 78 | .RE
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| 79 | .sp
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| 80 | .RE
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| 81 | .PP
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| 82 | NOTE:
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| 83 | This module follows the posix\-acl behaviour and hence allows permission stealing via chown\&. Samba might allow at a later point in time, to restrict the chown via this module as such restrictions are the responsibility of the underlying filesystem than of Samba\&.
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| 84 | .PP
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| 85 | This module makes use of the smb\&.conf parameter
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| 86 | \m[blue]\fBacl map full control\fR\m[]\&. When set to yes (the default), this parameter will add in the FILE_DELETE_CHILD bit on a returned ACE entry for a file (not a directory) that already contains all file permissions except for FILE_DELETE and FILE_DELETE_CHILD\&. This can prevent Windows applications that request GENERIC_ALL access from getting ACCESS_DENIED errors when running against a filesystem with NFSv4 compatible ACLs\&.
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| 87 | .PP
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| 88 | This module is stackable\&.
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| 89 | .PP
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| 90 | Since Samba 4\&.0 all options are per share options\&.
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| 91 | .SH "OPTIONS"
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| 92 | .PP
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| 93 | gpfs:sharemodes = [ yes | no ]
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| 94 | .RS 4
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| 95 | Enable/Disable cross node sharemode handling for GPFS\&.
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| 96 | .sp
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| 97 | .RS 4
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| 98 | .ie n \{\
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| 99 | \h'-04'\(bu\h'+03'\c
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| 100 | .\}
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| 101 | .el \{\
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| 102 | .sp -1
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| 103 | .IP \(bu 2.3
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| 104 | .\}
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| 105 | yes(default)
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| 106 | \- propagate sharemodes across all GPFS nodes\&.
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| 107 | .RE
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| 108 | .sp
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| 109 | .RS 4
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| 110 | .ie n \{\
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| 111 | \h'-04'\(bu\h'+03'\c
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| 112 | .\}
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| 113 | .el \{\
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| 114 | .sp -1
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| 115 | .IP \(bu 2.3
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| 116 | .\}
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| 117 | no
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| 118 | \- do not propagate sharemodes across all GPFS nodes\&. This should only be used if the GPFS file system is exclusively exported by Samba\&. Access by local unix application or NFS exports could lead to corrupted files\&.
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| 119 | .RE
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| 120 | .sp
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| 121 | .RE
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| 122 | .RE
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| 123 | .PP
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| 124 | gpfs:leases = [ yes | no ]
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| 125 | .RS 4
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| 126 | Enable/Disable cross node leases (oplocks) for GPFS\&. You should also set the
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| 127 | oplocks
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| 128 | and
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| 129 | kernel oplocks
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| 130 | options to the same value\&.
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| 131 | .sp
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| 132 | .RS 4
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| 133 | .ie n \{\
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| 134 | \h'-04'\(bu\h'+03'\c
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| 135 | .\}
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| 136 | .el \{\
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| 137 | .sp -1
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| 138 | .IP \(bu 2.3
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| 139 | .\}
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| 140 | yes(default)
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| 141 | \- propagate leases across all GPFS nodes\&.
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| 142 | .RE
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| 143 | .sp
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| 144 | .RS 4
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| 145 | .ie n \{\
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| 146 | \h'-04'\(bu\h'+03'\c
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| 147 | .\}
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| 148 | .el \{\
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| 149 | .sp -1
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| 150 | .IP \(bu 2.3
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| 151 | .\}
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| 152 | no
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| 153 | \- do not propagate leases across all GPFS nodes\&. This should only be used if the GPFS file system is exclusively exported by Samba\&. Access by local unix application or NFS exports could lead to corrupted files\&.
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| 154 | .RE
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| 155 | .sp
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| 156 | .RE
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| 157 | .RE
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| 158 | .PP
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| 159 | gpfs:hsm = [ yes | no ]
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| 160 | .RS 4
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| 161 | Enable/Disable announcing if this FS has HSM enabled\&.
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| 162 | .sp
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| 163 | .RS 4
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| 164 | .ie n \{\
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| 165 | \h'-04'\(bu\h'+03'\c
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| 166 | .\}
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| 167 | .el \{\
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| 168 | .sp -1
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| 169 | .IP \(bu 2.3
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| 170 | .\}
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| 171 | no(default)
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| 172 | \- Do not announce HSM\&.
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| 173 | .RE
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| 174 | .sp
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| 175 | .RS 4
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| 176 | .ie n \{\
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| 177 | \h'-04'\(bu\h'+03'\c
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| 178 | .\}
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| 179 | .el \{\
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| 180 | .sp -1
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| 181 | .IP \(bu 2.3
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| 182 | .\}
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| 183 | yes
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| 184 | \- Announce HSM\&.
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| 185 | .RE
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| 186 | .sp
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| 187 | .RE
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| 188 | .RE
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| 189 | .PP
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| 190 | gpfs:recalls = [ yes | no ]
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| 191 | .RS 4
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| 192 | When this option is set to no, an attempt to open an offline file will be rejected with access denied\&. This helps preventing recall storms triggered by careless applications like Finder and Explorer\&.
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| 193 | .sp
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| 194 | .RS 4
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| 195 | .ie n \{\
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| 196 | \h'-04'\(bu\h'+03'\c
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| 197 | .\}
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| 198 | .el \{\
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| 199 | .sp -1
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| 200 | .IP \(bu 2.3
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| 201 | .\}
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| 202 | yes(default)
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| 203 | \- Open files that are offline\&. This will recall the files from HSM\&.
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| 204 | .RE
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| 205 | .sp
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| 206 | .RS 4
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| 207 | .ie n \{\
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| 208 | \h'-04'\(bu\h'+03'\c
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| 209 | .\}
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| 210 | .el \{\
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| 211 | .sp -1
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| 212 | .IP \(bu 2.3
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| 213 | .\}
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| 214 | no
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| 215 | \- Reject access to offline files with access denied\&. This will prevent recalls of files from HSM\&. Using this setting also requires gpfs:hsm to be set to yes\&.
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| 216 | .RE
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| 217 | .sp
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| 218 | .RE
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| 219 | .RE
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| 220 | .PP
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| 221 | gpfs:getrealfilename = [ yes | no ]
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| 222 | .RS 4
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| 223 | Enable/Disable usage of the
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| 224 | gpfs_get_realfilename_path()
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| 225 | function\&. This improves the casesensitive wildcard file name access\&.
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| 226 | .sp
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| 227 | .RS 4
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| 228 | .ie n \{\
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| 229 | \h'-04'\(bu\h'+03'\c
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| 230 | .\}
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| 231 | .el \{\
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| 232 | .sp -1
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| 233 | .IP \(bu 2.3
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| 234 | .\}
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| 235 | yes(default)
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| 236 | \- use
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| 237 | gpfs_get_realfilename_path()\&.
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| 238 | .RE
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| 239 | .sp
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| 240 | .RS 4
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| 241 | .ie n \{\
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| 242 | \h'-04'\(bu\h'+03'\c
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| 243 | .\}
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| 244 | .el \{\
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| 245 | .sp -1
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| 246 | .IP \(bu 2.3
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| 247 | .\}
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| 248 | no
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| 249 | \- do not use
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| 250 | gpfs_get_realfilename_path()\&. It seems that
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| 251 | gpfs_get_realfilename_path()
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| 252 | doesn\*(Aqt work on AIX\&.
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| 253 | .RE
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| 254 | .sp
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| 255 | .RE
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| 256 | .RE
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| 257 | .PP
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| 258 | gpfs:winattr = [ yes | no ]
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| 259 | .RS 4
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| 260 | Enable/Disable usage of the windows attributes in GPFS\&. GPFS is able to store windows file attributes e\&.g\&. HIDDEN, READONLY, SYSTEM and others natively\&. That means Samba doesn\*(Aqt need to map them to permission bits or extended attributes\&.
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| 261 | .sp
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| 262 | .RS 4
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| 263 | .ie n \{\
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| 264 | \h'-04'\(bu\h'+03'\c
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| 265 | .\}
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| 266 | .el \{\
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| 267 | .sp -1
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| 268 | .IP \(bu 2.3
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| 269 | .\}
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| 270 | no(default)
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| 271 | \- do not use GPFS windows attributes\&.
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| 272 | .RE
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| 273 | .sp
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| 274 | .RS 4
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| 275 | .ie n \{\
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| 276 | \h'-04'\(bu\h'+03'\c
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| 277 | .\}
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| 278 | .el \{\
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| 279 | .sp -1
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| 280 | .IP \(bu 2.3
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| 281 | .\}
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| 282 | yes
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| 283 | \- use GPFS windows attributes\&.
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| 284 | .RE
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| 285 | .sp
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| 286 | .RE
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| 287 | .RE
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| 288 | .PP
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| 289 | gpfs:merge_writeappend = [ yes | no ]
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| 290 | .RS 4
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| 291 | GPFS ACLs doesn\*(Aqt know about the \*(AqAPPEND\*(Aq right\&. This option lets Samba map the \*(AqAPPEND\*(Aq right to \*(AqWRITE\*(Aq\&.
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| 292 | .sp
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| 293 | .RS 4
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| 294 | .ie n \{\
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| 295 | \h'-04'\(bu\h'+03'\c
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| 296 | .\}
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| 297 | .el \{\
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| 298 | .sp -1
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| 299 | .IP \(bu 2.3
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| 300 | .\}
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| 301 | yes(default)
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| 302 | \- map \*(AqAPPEND\*(Aq to \*(AqWRITE\*(Aq\&.
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| 303 | .RE
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| 304 | .sp
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| 305 | .RS 4
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| 306 | .ie n \{\
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| 307 | \h'-04'\(bu\h'+03'\c
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| 308 | .\}
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| 309 | .el \{\
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| 310 | .sp -1
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| 311 | .IP \(bu 2.3
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| 312 | .\}
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| 313 | no
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| 314 | \- do not map \*(AqAPPEND\*(Aq to \*(AqWRITE\*(Aq\&.
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| 315 | .RE
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| 316 | .sp
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| 317 | .RE
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| 318 | .RE
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| 319 | .PP
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| 320 | gpfs:acl = [ yes | no ]
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| 321 | .RS 4
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| 322 | This option lets Samba use or ignore GPFS ACLs\&.
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| 323 | .sp
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| 324 | .RS 4
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| 325 | .ie n \{\
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| 326 | \h'-04'\(bu\h'+03'\c
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| 327 | .\}
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| 328 | .el \{\
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| 329 | .sp -1
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| 330 | .IP \(bu 2.3
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| 331 | .\}
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| 332 | yes(default)
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| 333 | \- use GPFS ACLs\&.
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| 334 | .RE
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| 335 | .sp
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| 336 | .RS 4
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| 337 | .ie n \{\
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| 338 | \h'-04'\(bu\h'+03'\c
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| 339 | .\}
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| 340 | .el \{\
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| 341 | .sp -1
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| 342 | .IP \(bu 2.3
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| 343 | .\}
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| 344 | no
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| 345 | \- do not use GPFS ACLs and pass everything to the next SMB_VFS module\&.
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| 346 | .RE
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| 347 | .sp
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| 348 | .RE
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| 349 | .RE
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| 350 | .PP
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| 351 | gpfs:refuse_dacl_protected = [ yes | no ]
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| 352 | .RS 4
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| 353 | As GPFS does not support the ACE4_FLAG_NO_PROPAGATE NFSv4 flag (which would be the mapping for the DESC_DACL_PROTECTED flag), the status of this flag is currently silently ignored by Samba\&. That means that if you deselect the "Allow inheritable permissions\&.\&.\&." checkbox in Windows\*(Aq ACL dialog and then apply the ACL, the flag will be back immediately\&.
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| 354 | .sp
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| 355 | To make sure that automatic migration with e\&.g\&. robocopy does not lead to ACLs silently (and unintentionally) changed, you can set
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| 356 | gpfs:refuse_dacl_protected = yes
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| 357 | to enable an explicit check for this flag and if set, it will return NT_STATUS_NOT_SUPPORTED so errors are shown up on the Windows side and the Administrator is aware of the ACLs not being settable like intended
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| 358 | .sp
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| 359 | .RS 4
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| 360 | .ie n \{\
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| 361 | \h'-04'\(bu\h'+03'\c
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| 362 | .\}
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| 363 | .el \{\
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| 364 | .sp -1
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| 365 | .IP \(bu 2.3
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| 366 | .\}
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| 367 | no(default)
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| 368 | \- ignore the DESC_DACL_PROTECTED flags\&.
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| 369 | .RE
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| 370 | .sp
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| 371 | .RS 4
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| 372 | .ie n \{\
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| 373 | \h'-04'\(bu\h'+03'\c
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| 374 | .\}
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| 375 | .el \{\
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| 376 | .sp -1
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| 377 | .IP \(bu 2.3
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| 378 | .\}
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| 379 | yes
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| 380 | \- reject ACLs with DESC_DACL_PROTECTED\&.
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| 381 | .RE
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| 382 | .sp
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| 383 | .RE
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| 384 | .RE
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| 385 | .PP
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| 386 | gpfs:dfreequota = [ yes | no ]
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| 387 | .RS 4
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| 388 | Adjust reporting of the size and free space of a share according to quotas\&. If this setting is "yes", a request for size and free space will also evaluate the user quota of the user requesting the data and the group quota of the primary group of the user\&. Fileset quotas are not queried, since GPFS already provides the option \-\-dfreequota to reflect the fileset quota in the free space query\&. Please use that option to include fileset quotas in the reported disk space\&.
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| 389 | .sp
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| 390 | If any of the soft or hard quota limits has been reached, the free space will be reported as 0\&. If a quota is in place, but the limits have not been reached, the free space will be reported according to the space left in the quota\&. If more than one quota applies the free space will be reported as the smallest space left in those quotas\&. The size of the share will be reported according to the quota usage\&. If more than one quota applies, the smallest size will be reported for the share size according to these quotas\&.
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| 391 | .sp
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| 392 | .RS 4
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| 393 | .ie n \{\
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| 394 | \h'-04'\(bu\h'+03'\c
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| 395 | .\}
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| 396 | .el \{\
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| 397 | .sp -1
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| 398 | .IP \(bu 2.3
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| 399 | .\}
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| 400 | yes
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| 401 | \- include the quotas when reporting the share size and free space
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| 402 | .RE
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| 403 | .sp
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| 404 | .RS 4
|
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| 405 | .ie n \{\
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| 406 | \h'-04'\(bu\h'+03'\c
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| 407 | .\}
|
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| 408 | .el \{\
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| 409 | .sp -1
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| 410 | .IP \(bu 2.3
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| 411 | .\}
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| 412 | no(default)
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| 413 | \- do not include quotas, simply report the size and free space of the file system
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| 414 | .RE
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| 415 | .sp
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| 416 | .RE
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| 417 | .RE
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| 418 | .PP
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| 419 | gpfs:prealloc = [ yes | no ]
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| 420 | .RS 4
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| 421 | If set to yes the gpfs_prealloc function will be used in the fallocate callback when appropriate\&. If set to no gpfs_prealloc will not be used\&. In both cases the system and libc calls are avoided\&.
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| 422 | .sp
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|---|
| 423 | .RS 4
|
|---|
| 424 | .ie n \{\
|
|---|
| 425 | \h'-04'\(bu\h'+03'\c
|
|---|
| 426 | .\}
|
|---|
| 427 | .el \{\
|
|---|
| 428 | .sp -1
|
|---|
| 429 | .IP \(bu 2.3
|
|---|
| 430 | .\}
|
|---|
| 431 | yes (default)
|
|---|
| 432 | \- Use gpfs_prealloc for the fallocate callback\&.
|
|---|
| 433 | .RE
|
|---|
| 434 | .sp
|
|---|
| 435 | .RS 4
|
|---|
| 436 | .ie n \{\
|
|---|
| 437 | \h'-04'\(bu\h'+03'\c
|
|---|
| 438 | .\}
|
|---|
| 439 | .el \{\
|
|---|
| 440 | .sp -1
|
|---|
| 441 | .IP \(bu 2.3
|
|---|
| 442 | .\}
|
|---|
| 443 | no
|
|---|
| 444 | \- Do not use gpfs_prealloc for the fallocate callback\&.
|
|---|
| 445 | .RE
|
|---|
| 446 | .sp
|
|---|
| 447 | .RE
|
|---|
| 448 | .RE
|
|---|
| 449 | .PP
|
|---|
| 450 | gpfs:settimes = [ yes | no ]
|
|---|
| 451 | .RS 4
|
|---|
| 452 | Use the gpfs_set_times API when changing the timestamps of a file or directory\&. If the GPFS API is not available the old method of using utime and the GPFS winattr call will be used instead\&.
|
|---|
| 453 | .sp
|
|---|
| 454 | .RS 4
|
|---|
| 455 | .ie n \{\
|
|---|
| 456 | \h'-04'\(bu\h'+03'\c
|
|---|
| 457 | .\}
|
|---|
| 458 | .el \{\
|
|---|
| 459 | .sp -1
|
|---|
| 460 | .IP \(bu 2.3
|
|---|
| 461 | .\}
|
|---|
| 462 | yes(default)
|
|---|
| 463 | \- Use gpfs_set_times\&. Fall back to utime and winattr when it is not available\&.
|
|---|
| 464 | .RE
|
|---|
| 465 | .sp
|
|---|
| 466 | .RS 4
|
|---|
| 467 | .ie n \{\
|
|---|
| 468 | \h'-04'\(bu\h'+03'\c
|
|---|
| 469 | .\}
|
|---|
| 470 | .el \{\
|
|---|
| 471 | .sp -1
|
|---|
| 472 | .IP \(bu 2.3
|
|---|
| 473 | .\}
|
|---|
| 474 | no
|
|---|
| 475 | \- Do not use gpfs_set_times\&.
|
|---|
| 476 | .RE
|
|---|
| 477 | .sp
|
|---|
| 478 | .RE
|
|---|
| 479 | .RE
|
|---|
| 480 | .PP
|
|---|
| 481 | nfs4:mode = [ simple | special ]
|
|---|
| 482 | .RS 4
|
|---|
| 483 | Controls substitution of special IDs (OWNER@ and GROUP@) on GPFS\&. The use of mode simple is recommended\&. In this mode only non inheriting ACL entries for the file owner and group are mapped to special IDs\&.
|
|---|
| 484 | .sp
|
|---|
| 485 | The following MODEs are understood by the module:
|
|---|
| 486 | .sp
|
|---|
| 487 | .RS 4
|
|---|
| 488 | .ie n \{\
|
|---|
| 489 | \h'-04'\(bu\h'+03'\c
|
|---|
| 490 | .\}
|
|---|
| 491 | .el \{\
|
|---|
| 492 | .sp -1
|
|---|
| 493 | .IP \(bu 2.3
|
|---|
| 494 | .\}
|
|---|
| 495 | simple(default)
|
|---|
| 496 | \- use OWNER@ and GROUP@ special IDs for non inheriting ACEs only\&.
|
|---|
| 497 | .RE
|
|---|
| 498 | .sp
|
|---|
| 499 | .RS 4
|
|---|
| 500 | .ie n \{\
|
|---|
| 501 | \h'-04'\(bu\h'+03'\c
|
|---|
| 502 | .\}
|
|---|
| 503 | .el \{\
|
|---|
| 504 | .sp -1
|
|---|
| 505 | .IP \(bu 2.3
|
|---|
| 506 | .\}
|
|---|
| 507 | special(deprecated)
|
|---|
| 508 | \- use OWNER@ and GROUP@ special IDs in ACEs for all file owner and group ACEs\&.
|
|---|
| 509 | .RE
|
|---|
| 510 | .sp
|
|---|
| 511 | .RE
|
|---|
| 512 | .RE
|
|---|
| 513 | .PP
|
|---|
| 514 | nfs4:acedup = [dontcare|reject|ignore|merge]
|
|---|
| 515 | .RS 4
|
|---|
| 516 | This parameter configures how Samba handles duplicate ACEs encountered in GPFS ACLs\&. GPFS allows/creates duplicate ACE for different bits for same ID\&.
|
|---|
| 517 | .sp
|
|---|
| 518 | Following is the behaviour of Samba for different values :
|
|---|
| 519 | .sp
|
|---|
| 520 | .RS 4
|
|---|
| 521 | .ie n \{\
|
|---|
| 522 | \h'-04'\(bu\h'+03'\c
|
|---|
| 523 | .\}
|
|---|
| 524 | .el \{\
|
|---|
| 525 | .sp -1
|
|---|
| 526 | .IP \(bu 2.3
|
|---|
| 527 | .\}
|
|---|
| 528 | dontcare (default)
|
|---|
| 529 | \- copy the ACEs as they come
|
|---|
| 530 | .RE
|
|---|
| 531 | .sp
|
|---|
| 532 | .RS 4
|
|---|
| 533 | .ie n \{\
|
|---|
| 534 | \h'-04'\(bu\h'+03'\c
|
|---|
| 535 | .\}
|
|---|
| 536 | .el \{\
|
|---|
| 537 | .sp -1
|
|---|
| 538 | .IP \(bu 2.3
|
|---|
| 539 | .\}
|
|---|
| 540 | reject
|
|---|
| 541 | \- stop operation and exit with error on ACL set op
|
|---|
| 542 | .RE
|
|---|
| 543 | .sp
|
|---|
| 544 | .RS 4
|
|---|
| 545 | .ie n \{\
|
|---|
| 546 | \h'-04'\(bu\h'+03'\c
|
|---|
| 547 | .\}
|
|---|
| 548 | .el \{\
|
|---|
| 549 | .sp -1
|
|---|
| 550 | .IP \(bu 2.3
|
|---|
| 551 | .\}
|
|---|
| 552 | ignore
|
|---|
| 553 | \- don\*(Aqt include the second matching ACE
|
|---|
| 554 | .RE
|
|---|
| 555 | .sp
|
|---|
| 556 | .RS 4
|
|---|
| 557 | .ie n \{\
|
|---|
| 558 | \h'-04'\(bu\h'+03'\c
|
|---|
| 559 | .\}
|
|---|
| 560 | .el \{\
|
|---|
| 561 | .sp -1
|
|---|
| 562 | .IP \(bu 2.3
|
|---|
| 563 | .\}
|
|---|
| 564 | merge
|
|---|
| 565 | \- bitwise OR the 2 ace\&.flag fields and 2 ace\&.mask fields of the 2 duplicate ACEs into 1 ACE
|
|---|
| 566 | .RE
|
|---|
| 567 | .sp
|
|---|
| 568 | .RE
|
|---|
| 569 | .RE
|
|---|
| 570 | .PP
|
|---|
| 571 | nfs4:chown = [yes|no]
|
|---|
| 572 | .RS 4
|
|---|
| 573 | This parameter allows enabling or disabling the chown supported by the underlying filesystem\&. This parameter should be enabled with care as it might leave your system insecure\&.
|
|---|
| 574 | .sp
|
|---|
| 575 | Some filesystems allow chown as a) giving b) stealing\&. It is the latter that is considered a risk\&.
|
|---|
| 576 | .sp
|
|---|
| 577 | Following is the behaviour of Samba for different values :
|
|---|
| 578 | .sp
|
|---|
| 579 | .RS 4
|
|---|
| 580 | .ie n \{\
|
|---|
| 581 | \h'-04'\(bu\h'+03'\c
|
|---|
| 582 | .\}
|
|---|
| 583 | .el \{\
|
|---|
| 584 | .sp -1
|
|---|
| 585 | .IP \(bu 2.3
|
|---|
| 586 | .\}
|
|---|
| 587 | yes
|
|---|
| 588 | \- Enable chown if as supported by the under filesystem
|
|---|
| 589 | .RE
|
|---|
| 590 | .sp
|
|---|
| 591 | .RS 4
|
|---|
| 592 | .ie n \{\
|
|---|
| 593 | \h'-04'\(bu\h'+03'\c
|
|---|
| 594 | .\}
|
|---|
| 595 | .el \{\
|
|---|
| 596 | .sp -1
|
|---|
| 597 | .IP \(bu 2.3
|
|---|
| 598 | .\}
|
|---|
| 599 | no (default)
|
|---|
| 600 | \- Disable chown
|
|---|
| 601 | .RE
|
|---|
| 602 | .sp
|
|---|
| 603 | .RE
|
|---|
| 604 | .RE
|
|---|
| 605 | .PP
|
|---|
| 606 | gpfs:syncio = [yes|no]
|
|---|
| 607 | .RS 4
|
|---|
| 608 | This parameter makes Samba open all files with O_SYNC\&. This triggers optimizations in GPFS for workloads that heavily share files\&.
|
|---|
| 609 | .sp
|
|---|
| 610 | Following is the behaviour of Samba for different values:
|
|---|
| 611 | .sp
|
|---|
| 612 | .RS 4
|
|---|
| 613 | .ie n \{\
|
|---|
| 614 | \h'-04'\(bu\h'+03'\c
|
|---|
| 615 | .\}
|
|---|
| 616 | .el \{\
|
|---|
| 617 | .sp -1
|
|---|
| 618 | .IP \(bu 2.3
|
|---|
| 619 | .\}
|
|---|
| 620 | yes
|
|---|
| 621 | \- Open files with O_SYNC
|
|---|
| 622 | .RE
|
|---|
| 623 | .sp
|
|---|
| 624 | .RS 4
|
|---|
| 625 | .ie n \{\
|
|---|
| 626 | \h'-04'\(bu\h'+03'\c
|
|---|
| 627 | .\}
|
|---|
| 628 | .el \{\
|
|---|
| 629 | .sp -1
|
|---|
| 630 | .IP \(bu 2.3
|
|---|
| 631 | .\}
|
|---|
| 632 | no (default)
|
|---|
| 633 | \- Open files as normal Samba would do
|
|---|
| 634 | .RE
|
|---|
| 635 | .sp
|
|---|
| 636 | .RE
|
|---|
| 637 | .RE
|
|---|
| 638 | .SH "EXAMPLES"
|
|---|
| 639 | .PP
|
|---|
| 640 | A GPFS mount can be exported via Samba as follows :
|
|---|
| 641 | .sp
|
|---|
| 642 | .if n \{\
|
|---|
| 643 | .RS 4
|
|---|
| 644 | .\}
|
|---|
| 645 | .nf
|
|---|
| 646 | \fI[samba_gpfs_share]\fR
|
|---|
| 647 | \m[blue]\fBvfs objects = gpfs\fR\m[]
|
|---|
| 648 | \m[blue]\fBpath = /test/gpfs_mount\fR\m[]
|
|---|
| 649 | \m[blue]\fBnfs4: mode = special\fR\m[]
|
|---|
| 650 | \m[blue]\fBnfs4: acedup = merge\fR\m[]
|
|---|
| 651 | .fi
|
|---|
| 652 | .if n \{\
|
|---|
| 653 | .RE
|
|---|
| 654 | .\}
|
|---|
| 655 | .SH "CAVEATS"
|
|---|
| 656 | .PP
|
|---|
| 657 | Depending on the version of gpfs, the
|
|---|
| 658 | libgpfs_gpl
|
|---|
| 659 | library or the
|
|---|
| 660 | libgpfs
|
|---|
| 661 | library is needed at runtime by the
|
|---|
| 662 | gpfs
|
|---|
| 663 | VFS module: Starting with gpfs 3\&.2\&.1 PTF8, the complete
|
|---|
| 664 | libgpfs
|
|---|
| 665 | is available as open source and
|
|---|
| 666 | libgpfs_gpl
|
|---|
| 667 | does no longer exist\&. With earlier versions of gpfs, only the
|
|---|
| 668 | libgpfs_gpl
|
|---|
| 669 | library was open source and could be used at run time\&.
|
|---|
| 670 | .PP
|
|---|
| 671 | At build time, only the header file
|
|---|
| 672 | gpfs_gpl\&.h
|
|---|
| 673 | is required, which is a symlink to
|
|---|
| 674 | gpfs\&.h
|
|---|
| 675 | in gpfs versions newer than 3\&.2\&.1 PTF8\&.
|
|---|
| 676 | .SH "VERSION"
|
|---|
| 677 | .PP
|
|---|
| 678 | This man page is correct for version 3\&.0\&.25 of the Samba suite\&.
|
|---|
| 679 | .SH "AUTHOR"
|
|---|
| 680 | .PP
|
|---|
| 681 | The original Samba software and related utilities were created by Andrew Tridgell\&. Samba is now developed by the Samba Team as an Open Source project similar to the way the Linux kernel is developed\&.
|
|---|
| 682 | .PP
|
|---|
| 683 | The GPFS VFS module was created with contributions from Volker Lendecke and the developers at IBM\&.
|
|---|
| 684 | .PP
|
|---|
| 685 | This manpage was created by the IBM FSCC team
|
|---|
