| 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 v1.76.1 <http://docbook.sf.net/>
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| 5 | .\" Date: 09/18/2013
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| 6 | .\" Manual: System Administration tools
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| 7 | .\" Source: Samba 3.6
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| 8 | .\" Language: English
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| 9 | .\"
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| 10 | .TH "VFS_GPFS" "8" "09/18/2013" "Samba 3\&.6" "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: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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| 83 | .PP
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| 84 | This module is stackable\&.
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| 85 | .SH "OPTIONS"
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| 86 | .PP
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| 87 | gpfs:sharemodes = [ yes | no ]
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| 88 | .RS 4
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| 89 | Enable/Disable cross node sharemode handling for GPFS\&.
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| 90 | .sp
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| 91 | .RS 4
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| 92 | .ie n \{\
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| 93 | \h'-04'\(bu\h'+03'\c
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| 94 | .\}
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| 95 | .el \{\
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| 96 | .sp -1
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| 97 | .IP \(bu 2.3
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| 98 | .\}
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| 99 |
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| 100 | yes(default)
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| 101 | \- propagate sharemodes across all GPFS nodes\&.
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| 102 | .RE
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| 103 | .sp
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| 104 | .RS 4
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| 105 | .ie n \{\
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| 106 | \h'-04'\(bu\h'+03'\c
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| 107 | .\}
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| 108 | .el \{\
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| 109 | .sp -1
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| 110 | .IP \(bu 2.3
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| 111 | .\}
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| 112 |
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| 113 | no
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| 114 | \- 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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| 115 | .RE
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| 116 | .sp
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| 117 | .RE
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| 118 | .RE
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| 119 | .PP
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| 120 | gpfs:leases = [ yes | no ]
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| 121 | .RS 4
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| 122 | Enable/Disable cross node leases (oplocks) for GPFS\&. You should also set the
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| 123 | oplocks
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| 124 | and
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| 125 | kernel oplocks
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| 126 | options to the same value\&.
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| 127 | .sp
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| 128 | .RS 4
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| 129 | .ie n \{\
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| 130 | \h'-04'\(bu\h'+03'\c
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| 131 | .\}
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| 132 | .el \{\
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| 133 | .sp -1
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| 134 | .IP \(bu 2.3
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| 135 | .\}
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| 136 |
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| 137 | yes(default)
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| 138 | \- propagate leases across all GPFS nodes\&.
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| 139 | .RE
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| 140 | .sp
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| 141 | .RS 4
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| 142 | .ie n \{\
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| 143 | \h'-04'\(bu\h'+03'\c
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| 144 | .\}
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| 145 | .el \{\
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| 146 | .sp -1
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| 147 | .IP \(bu 2.3
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| 148 | .\}
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| 149 |
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| 150 | no
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| 151 | \- 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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| 152 | .RE
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| 153 | .sp
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| 154 | .RE
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| 155 | .RE
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| 156 | .PP
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| 157 | gpfs:hsm = [ yes | no ]
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| 158 | .RS 4
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| 159 | Enable/Disable announcing if this FS has HSM enabled\&.
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| 160 | .sp
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| 161 | .RS 4
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| 162 | .ie n \{\
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| 163 | \h'-04'\(bu\h'+03'\c
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| 164 | .\}
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| 165 | .el \{\
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| 166 | .sp -1
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| 167 | .IP \(bu 2.3
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| 168 | .\}
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| 169 |
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| 170 | no(default)
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| 171 | \- Do not announce HSM\&.
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| 172 | .RE
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| 173 | .sp
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| 174 | .RS 4
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| 175 | .ie n \{\
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| 176 | \h'-04'\(bu\h'+03'\c
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| 177 | .\}
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| 178 | .el \{\
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| 179 | .sp -1
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| 180 | .IP \(bu 2.3
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| 181 | .\}
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| 182 |
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| 183 | no
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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:getrealfilename = [ yes | no ]
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| 191 | .RS 4
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| 192 | Enable/Disable usage of the
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| 193 | gpfs_get_realfilename_path()
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| 194 | function\&. This improves the casesensitive wildcard file name access\&.
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| 195 | .sp
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| 196 | .RS 4
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| 197 | .ie n \{\
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| 198 | \h'-04'\(bu\h'+03'\c
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| 199 | .\}
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| 200 | .el \{\
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| 201 | .sp -1
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| 202 | .IP \(bu 2.3
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| 203 | .\}
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| 204 |
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| 205 | yes(default)
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| 206 | \- use
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| 207 | gpfs_get_realfilename_path()\&.
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| 208 | .RE
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| 209 | .sp
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| 210 | .RS 4
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| 211 | .ie n \{\
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| 212 | \h'-04'\(bu\h'+03'\c
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| 213 | .\}
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| 214 | .el \{\
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| 215 | .sp -1
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| 216 | .IP \(bu 2.3
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| 217 | .\}
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| 218 |
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| 219 | no
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| 220 | \- do not use
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| 221 | gpfs_get_realfilename_path()\&. It seems that
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| 222 | gpfs_get_realfilename_path()
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| 223 | doesn\*(Aqt work on AIX\&.
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| 224 | .RE
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| 225 | .sp
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| 226 | .RE
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| 227 | .RE
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| 228 | .PP
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| 229 | gpfs:winattr = [ yes | no ]
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| 230 | .RS 4
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| 231 | 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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| 232 | .sp
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| 233 | .RS 4
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| 234 | .ie n \{\
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| 235 | \h'-04'\(bu\h'+03'\c
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| 236 | .\}
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| 237 | .el \{\
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| 238 | .sp -1
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| 239 | .IP \(bu 2.3
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| 240 | .\}
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| 241 |
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| 242 | no(default)
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| 243 | \- do not use GPFS windows attributes\&.
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| 244 | .RE
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| 245 | .sp
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| 246 | .RS 4
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| 247 | .ie n \{\
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| 248 | \h'-04'\(bu\h'+03'\c
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| 249 | .\}
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| 250 | .el \{\
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| 251 | .sp -1
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| 252 | .IP \(bu 2.3
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| 253 | .\}
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| 254 |
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| 255 | yes
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| 256 | \- use GPFS windows attributes\&.
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| 257 | .RE
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| 258 | .sp
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| 259 | .RE
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| 260 | .RE
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| 261 | .PP
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| 262 | gpfs:merge_writeappend = [ yes | no ]
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| 263 | .RS 4
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| 264 | GPFS ACLs doesn\*(Aqt know about the \*(AqAPPEND\*(Aq right\&. This optionen lets Samba map the \*(AqAPPEND\*(Aq right to \*(AqWRITE\*(Aq\&.
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| 265 | .sp
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| 266 | .RS 4
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| 267 | .ie n \{\
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| 268 | \h'-04'\(bu\h'+03'\c
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| 269 | .\}
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| 270 | .el \{\
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| 271 | .sp -1
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| 272 | .IP \(bu 2.3
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| 273 | .\}
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| 274 |
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| 275 | yes(default)
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| 276 | \- map \*(AqAPPEND\*(Aq to \*(AqWRITE\*(Aq\&.
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| 277 | .RE
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| 278 | .sp
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| 279 | .RS 4
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| 280 | .ie n \{\
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| 281 | \h'-04'\(bu\h'+03'\c
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| 282 | .\}
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| 283 | .el \{\
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| 284 | .sp -1
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| 285 | .IP \(bu 2.3
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| 286 | .\}
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| 287 |
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| 288 | no
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| 289 | \- do not map \*(AqAPPEND\*(Aq to \*(AqWRITE\*(Aq\&.
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| 290 | .RE
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| 291 | .sp
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| 292 | .RE
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| 293 | .RE
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| 294 | .PP
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| 295 | gpfs:refuse_dacl_protected = [ yes | no ]
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| 296 | .RS 4
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| 297 | 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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| 298 | .sp
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| 299 | 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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| 300 | gpfs:refuse_dacl_protected = yes
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| 301 | 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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| 302 | .sp
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| 303 | .RS 4
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| 304 | .ie n \{\
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| 305 | \h'-04'\(bu\h'+03'\c
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| 306 | .\}
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| 307 | .el \{\
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| 308 | .sp -1
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| 309 | .IP \(bu 2.3
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| 310 | .\}
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| 311 |
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| 312 | no(default)
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| 313 | \- ignore the DESC_DACL_PROTECTED flags\&.
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| 314 | .RE
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| 315 | .sp
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| 316 | .RS 4
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| 317 | .ie n \{\
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| 318 | \h'-04'\(bu\h'+03'\c
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| 319 | .\}
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| 320 | .el \{\
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| 321 | .sp -1
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| 322 | .IP \(bu 2.3
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| 323 | .\}
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| 324 |
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| 325 | yes
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| 326 | \- reject ACLs with DESC_DACL_PROTECTED\&.
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| 327 | .RE
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| 328 | .sp
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| 329 | .RE
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| 330 | .RE
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| 331 | .PP
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| 332 | nfs4:mode = [ simple | special ]
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| 333 | .RS 4
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| 334 | Enable/Disable substitution of special IDs on GPFS\&. This parameter should not affect the windows users in anyway\&. It only ensures that Samba sets the special IDs \- OWNER@ and GROUP@ ( mappings to simple uids ) that are relevant to GPFS\&.
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| 335 | .sp
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| 336 | The following MODEs are understood by the module:
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| 337 | .sp
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| 338 | .RS 4
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| 339 | .ie n \{\
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| 340 | \h'-04'\(bu\h'+03'\c
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| 341 | .\}
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| 342 | .el \{\
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| 343 | .sp -1
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| 344 | .IP \(bu 2.3
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| 345 | .\}
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| 346 | simple(default)
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| 347 | \- do not use special IDs in GPFS ACEs
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| 348 | .RE
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| 349 | .sp
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| 350 | .RS 4
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| 351 | .ie n \{\
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| 352 | \h'-04'\(bu\h'+03'\c
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| 353 | .\}
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| 354 | .el \{\
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| 355 | .sp -1
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| 356 | .IP \(bu 2.3
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| 357 | .\}
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| 358 | special
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| 359 | \- use special IDs in GPFS ACEs\&.
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| 360 | .RE
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| 361 | .sp
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| 362 | .RE
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| 363 | .RE
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| 364 | .PP
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| 365 | nfs4:acedup = [dontcare|reject|ignore|merge]
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| 366 | .RS 4
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| 367 | This parameter configures how Samba handles duplicate ACEs encountered in GPFS ACLs\&. GPFS allows/creates duplicate ACE for different bits for same ID\&.
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| 368 | .sp
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| 369 | Following is the behaviour of Samba for different values :
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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 | dontcare (default)
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| 380 | \- copy the ACEs as they come
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| 381 | .RE
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| 382 | .sp
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| 383 | .RS 4
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| 384 | .ie n \{\
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| 385 | \h'-04'\(bu\h'+03'\c
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| 386 | .\}
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| 387 | .el \{\
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| 388 | .sp -1
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| 389 | .IP \(bu 2.3
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| 390 | .\}
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| 391 | reject
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| 392 | \- stop operation and exit with error on ACL set op
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| 393 | .RE
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| 394 | .sp
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| 395 | .RS 4
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| 396 | .ie n \{\
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| 397 | \h'-04'\(bu\h'+03'\c
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| 398 | .\}
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| 399 | .el \{\
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| 400 | .sp -1
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| 401 | .IP \(bu 2.3
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| 402 | .\}
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| 403 | ignore
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| 404 | \- don\*(Aqt include the second matching ACE
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| 405 | .RE
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| 406 | .sp
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| 407 | .RS 4
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| 408 | .ie n \{\
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| 409 | \h'-04'\(bu\h'+03'\c
|
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| 410 | .\}
|
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| 411 | .el \{\
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| 412 | .sp -1
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| 413 | .IP \(bu 2.3
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| 414 | .\}
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| 415 | merge
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| 416 | \- bitwise OR the 2 ace\&.flag fields and 2 ace\&.mask fields of the 2 duplicate ACEs into 1 ACE
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| 417 | .RE
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| 418 | .sp
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| 419 | .RE
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| 420 | .RE
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| 421 | .PP
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| 422 | nfs4:chown = [yes|no]
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| 423 | .RS 4
|
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| 424 | 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\&.
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| 425 | .sp
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| 426 | Some filesystems allow chown as a) giving b) stealing\&. It is the latter that is considered a risk\&.
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| 427 | .sp
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| 428 | Following is the behaviour of Samba for different values :
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| 429 | .sp
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| 430 | .RS 4
|
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| 431 | .ie n \{\
|
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| 432 | \h'-04'\(bu\h'+03'\c
|
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| 433 | .\}
|
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| 434 | .el \{\
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| 435 | .sp -1
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| 436 | .IP \(bu 2.3
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| 437 | .\}
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| 438 | yes
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| 439 | \- Enable chown if as supported by the under filesystem
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| 440 | .RE
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| 441 | .sp
|
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| 442 | .RS 4
|
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| 443 | .ie n \{\
|
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| 444 | \h'-04'\(bu\h'+03'\c
|
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| 445 | .\}
|
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| 446 | .el \{\
|
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| 447 | .sp -1
|
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| 448 | .IP \(bu 2.3
|
|---|
| 449 | .\}
|
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| 450 | no (default)
|
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| 451 | \- Disable chown
|
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| 452 | .RE
|
|---|
| 453 | .sp
|
|---|
| 454 | .RE
|
|---|
| 455 | .RE
|
|---|
| 456 | .PP
|
|---|
| 457 | gpfs:syncio = [yes|no]
|
|---|
| 458 | .RS 4
|
|---|
| 459 | This parameter makes Samba open all files with O_SYNC\&. This triggers optimizations in GPFS for workloads that heavily share files\&.
|
|---|
| 460 | .sp
|
|---|
| 461 | Following is the behaviour of Samba for different values:
|
|---|
| 462 | .sp
|
|---|
| 463 | .RS 4
|
|---|
| 464 | .ie n \{\
|
|---|
| 465 | \h'-04'\(bu\h'+03'\c
|
|---|
| 466 | .\}
|
|---|
| 467 | .el \{\
|
|---|
| 468 | .sp -1
|
|---|
| 469 | .IP \(bu 2.3
|
|---|
| 470 | .\}
|
|---|
| 471 | yesOpen files with O_SYNC
|
|---|
| 472 | .RE
|
|---|
| 473 | .sp
|
|---|
| 474 | .RS 4
|
|---|
| 475 | .ie n \{\
|
|---|
| 476 | \h'-04'\(bu\h'+03'\c
|
|---|
| 477 | .\}
|
|---|
| 478 | .el \{\
|
|---|
| 479 | .sp -1
|
|---|
| 480 | .IP \(bu 2.3
|
|---|
| 481 | .\}
|
|---|
| 482 | no (default)Open files as normal Samba would do
|
|---|
| 483 | .RE
|
|---|
| 484 | .sp
|
|---|
| 485 | .RE
|
|---|
| 486 | .RE
|
|---|
| 487 | .SH "EXAMPLES"
|
|---|
| 488 | .PP
|
|---|
| 489 | A GPFS mount can be exported via Samba as follows :
|
|---|
| 490 | .sp
|
|---|
| 491 | .if n \{\
|
|---|
| 492 | .RS 4
|
|---|
| 493 | .\}
|
|---|
| 494 | .nf
|
|---|
| 495 | \fI[samba_gpfs_share]\fR
|
|---|
| 496 | \m[blue]\fBvfs objects = gpfs\fR\m[]
|
|---|
| 497 | \m[blue]\fBpath = /test/gpfs_mount\fR\m[]
|
|---|
| 498 | \m[blue]\fBnfs4: mode = special\fR\m[]
|
|---|
| 499 | \m[blue]\fBnfs4: acedup = merge\fR\m[]
|
|---|
| 500 | .fi
|
|---|
| 501 | .if n \{\
|
|---|
| 502 | .RE
|
|---|
| 503 | .\}
|
|---|
| 504 | .SH "CAVEATS"
|
|---|
| 505 | .PP
|
|---|
| 506 | Depending on the version of gpfs, the
|
|---|
| 507 | libgpfs_gpl
|
|---|
| 508 | library or the
|
|---|
| 509 | libgpfs
|
|---|
| 510 | library is needed at runtime by the
|
|---|
| 511 | gpfs
|
|---|
| 512 | VFS module: Starting with gpfs 3\&.2\&.1 PTF8, the complete
|
|---|
| 513 | libgpfs
|
|---|
| 514 | is available as open source and
|
|---|
| 515 | libgpfs_gpl
|
|---|
| 516 | does no longer exist\&. With earlier versions of gpfs, only the
|
|---|
| 517 | libgpfs_gpl
|
|---|
| 518 | library was open source and could be used at run time\&.
|
|---|
| 519 | .PP
|
|---|
| 520 | At build time, only the header file
|
|---|
| 521 | gpfs_gpl\&.h
|
|---|
| 522 | is required , which is a symlink to
|
|---|
| 523 | gpfs\&.h
|
|---|
| 524 | in gpfs versions newer than 3\&.2\&.1 PTF8\&.
|
|---|
| 525 | .SH "VERSION"
|
|---|
| 526 | .PP
|
|---|
| 527 | This man page is correct for version 3\&.0\&.25 of the Samba suite\&.
|
|---|
| 528 | .SH "AUTHOR"
|
|---|
| 529 | .PP
|
|---|
| 530 | 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\&.
|
|---|
| 531 | .PP
|
|---|
| 532 | The GPFS VFS module was created with contributions from Volker Lendecke and the developers at IBM\&.
|
|---|
| 533 | .PP
|
|---|
| 534 | This manpage was created by the IBM FSCC team
|
|---|
