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OS-4060 need tmpfs size support in percent
OS-4043 tmpfs should support gigabyte sizes
OS-4044 tmpfs should support "mode" option
Reviewed by: Robert Mustacchi <rm@joyent.com>
Reviewed by: Patrick Mooney <patrick.mooney@joyent.com>
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--- old/usr/src/man/man1m/mount_tmpfs.1m.man.txt
+++ new/usr/src/man/man1m/mount_tmpfs.1m.man.txt
1 1 MOUNT_TMPFS(1M) Maintenance Commands MOUNT_TMPFS(1M)
2 2
3 3
4 4
5 5 NAME
6 6 mount_tmpfs - mount tmpfs file systems
7 7
8 8 SYNOPSIS
9 9 mount [-F tmpfs] [-o specific_options] [-O] special mount_point
10 10
11 11
12 12 DESCRIPTION
13 13 tmpfs is a memory based file system which uses kernel resources
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14 14 relating to the VM system and page cache as a file system.
15 15
16 16
17 17 mount attaches a tmpfs file system to the file system hierarchy at the
18 18 pathname location mount_point, which must already exist. If mount_point
19 19 has any contents prior to the mount operation, these remain hidden
20 20 until the file system is once again unmounted. The attributes (mode,
21 21 owner, and group) of the root of the tmpfs filesystem are inherited
22 22 from the underlying mount_point, provided that those attributes are
23 23 determinable. If not, the root's attributes are set to their default
24 - values.
24 + values. The mode may also be overriden by the mode mount option, which
25 + takes precedence if set.
25 26
26 27
27 28 The special argument is usually specified as swap but is in fact
28 29 disregarded and assumed to be the virtual memory resources within the
29 30 system.
30 31
31 32 OPTIONS
32 33 -o specific_options
33 34 Specify tmpfs file system specific options in a
34 35 comma-separated list with no intervening spaces.
35 36 If invalid options are specified, a warning
36 37 message is printed and the invalid options are
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37 38 ignored. The following options are available:
38 39
39 40 remount
40 41
41 42 Remounts a file system with a
42 43 new size. A size not
43 44 explicitly set with remount
44 45 reverts to no limit.
45 46
46 47
48 + mode=octalmode
49 + The mode argument controls
50 + the permissions of the tmpfs
51 + mount point. The argument
52 + must be an octal number, of
53 + the form passed to chmod(1).
54 + Only the access mode, setuid,
55 + setgid, and sticky bits (a
56 + mask of 07777) may be set.
57 + If this option is not
58 + provided then the default
59 + mode behaviour, as described
60 + above, applies.
61 +
62 +
63 +
47 64 size=sz
48 65 The sz argument controls the
49 66 size of this particular tmpfs
50 67 file system. If the argument
51 68 is has a `k' suffix, the
52 69 number will be interpreted as
53 70 a number of kilobytes. An `m'
54 71 suffix will be interpreted as
55 - a number of megabytes. No
56 - suffix is interpreted as
72 + a number of megabytes. A `g'
73 + suffix will be interpreted as
74 + a number of gigabytes. A `%'
75 + suffix will be interpreted as
76 + a percentage of the swap
77 + space available to the zone.
78 + No suffix is interpreted as
57 79 bytes. In all cases, the
58 80 actual size of the file
59 81 system is the number of bytes
60 82 specified, rounded up to the
61 83 physical pagesize of the
62 84 system.
63 85
64 86
65 87 xattr | noxattr
66 88 Allow or disallow the
67 89 creation and manipulation of
68 90 extended attributes. The
69 91 default is xattr. See
70 92 fsattr(5) for a description
71 93 of extended attributes.
72 94
73 95
74 96
75 97 -O
76 98 Overlay mount. Allow the file system to be
77 99 mounted over an existing mount point, making the
78 100 underlying file system inaccessible. If a mount
79 101 is attempted on a pre-existing mount point
80 102 without setting this flag, the mount will fail,
81 103 producing the errordevice busy.
82 104
83 105
84 106 FILES
85 107 /etc/mnttab
86 108 Table of mounted file systems
87 109
88 110
89 111 SEE ALSO
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90 112 mount(1M), mkdir(2), mount(2), open(2), umount(2), mnttab(4),
91 113 attributes(5), fsattr(5), tmpfs(7FS)
92 114
93 115 NOTES
94 116 If the directory on which a file system is to be mounted is a symbolic
95 117 link, the file system is mounted on the directory to which the symbolic
96 118 link refers, rather than on top of the symbolic link itself.
97 119
98 120
99 121
100 - December 2, 2011 MOUNT_TMPFS(1M)
122 + March 18, 2015 MOUNT_TMPFS(1M)
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