Linux/fs/overlayfs/Kconfig

Version: ~ [ linux-6.12-rc7 ] ~ [ linux-6.11.7 ] ~ [ linux-6.10.14 ] ~ [ linux-6.9.12 ] ~ [ linux-6.8.12 ] ~ [ linux-6.7.12 ] ~ [ linux-6.6.60 ] ~ [ linux-6.5.13 ] ~ [ linux-6.4.16 ] ~ [ linux-6.3.13 ] ~ [ linux-6.2.16 ] ~ [ linux-6.1.116 ] ~ [ linux-6.0.19 ] ~ [ linux-5.19.17 ] ~ [ linux-5.18.19 ] ~ [ linux-5.17.15 ] ~ [ linux-5.16.20 ] ~ [ linux-5.15.171 ] ~ [ linux-5.14.21 ] ~ [ linux-5.13.19 ] ~ [ linux-5.12.19 ] ~ [ linux-5.11.22 ] ~ [ linux-5.10.229 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.285 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.323 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.336 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.337 ] ~ [ linux-4.4.302 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.12 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

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1 # SPDX-License-Identifier: GPL-2.0-only << 2 config OVERLAY_FS 1 config OVERLAY_FS 3 tristate "Overlay filesystem support" 2 tristate "Overlay filesystem support" 4 select FS_STACK << 5 select EXPORTFS << 6 help 3 help 7 An overlay filesystem combines two f 4 An overlay filesystem combines two filesystems - an 'upper' filesystem 8 and a 'lower' filesystem. When a na 5 and a 'lower' filesystem. When a name exists in both filesystems, the 9 object in the 'upper' filesystem is 6 object in the 'upper' filesystem is visible while the object in the 10 'lower' filesystem is either hidden 7 'lower' filesystem is either hidden or, in the case of directories, 11 merged with the 'upper' object. 8 merged with the 'upper' object. 12 9 13 For more information see Documentati !! 10 For more information see Documentation/filesystems/overlayfs.txt 14 11 15 config OVERLAY_FS_REDIRECT_DIR 12 config OVERLAY_FS_REDIRECT_DIR 16 bool "Overlayfs: turn on redirect dire !! 13 bool "Overlayfs: turn on redirect dir feature by default" 17 depends on OVERLAY_FS 14 depends on OVERLAY_FS 18 help 15 help 19 If this config option is enabled the 16 If this config option is enabled then overlay filesystems will use 20 redirects when renaming directories 17 redirects when renaming directories by default. In this case it is 21 still possible to turn off redirects 18 still possible to turn off redirects globally with the 22 "redirect_dir=off" module option or 19 "redirect_dir=off" module option or on a filesystem instance basis 23 with the "redirect_dir=off" mount op 20 with the "redirect_dir=off" mount option. 24 21 25 Note, that redirects are not backwar 22 Note, that redirects are not backward compatible. That is, mounting 26 an overlay which has redirects on a 23 an overlay which has redirects on a kernel that doesn't support this 27 feature will have unexpected results 24 feature will have unexpected results. 28 << 29 If unsure, say N. << 30 << 31 config OVERLAY_FS_REDIRECT_ALWAYS_FOLLOW << 32 bool "Overlayfs: follow redirects even << 33 default y << 34 depends on OVERLAY_FS << 35 help << 36 Disable this to get a possibly more << 37 might not be backward compatible wit << 38 << 39 If backward compatibility is not an << 40 recommended to say N here. << 41 << 42 For more information, see Documentat << 43 << 44 If unsure, say Y. << 45 << 46 config OVERLAY_FS_INDEX << 47 bool "Overlayfs: turn on inodes index << 48 depends on OVERLAY_FS << 49 help << 50 If this config option is enabled the << 51 the index directory to map lower ino << 52 In this case it is still possible to << 53 "index=off" module option or on a fi << 54 "index=off" mount option. << 55 << 56 The inodes index feature prevents br << 57 up. << 58 << 59 Note, that the inodes index feature << 60 That is, mounting an overlay which h << 61 that doesn't support this feature wi << 62 << 63 If unsure, say N. << 64 << 65 config OVERLAY_FS_NFS_EXPORT << 66 bool "Overlayfs: turn on NFS export fe << 67 depends on OVERLAY_FS << 68 depends on OVERLAY_FS_INDEX << 69 depends on !OVERLAY_FS_METACOPY << 70 help << 71 If this config option is enabled the << 72 the index directory to decode overla << 73 In this case, it is still possible t << 74 globally with the "nfs_export=off" m << 75 instance basis with the "nfs_export= << 76 << 77 The NFS export feature creates an in << 78 directory. This full index is used << 79 inconsistencies on lookup, like redi << 80 the same lower dir. The full index << 81 time, especially when verifying that << 82 stale. << 83 << 84 Note, that the NFS export feature is << 85 That is, mounting an overlay which h << 86 that doesn't support this feature wi << 87 << 88 Most users should say N here and ena << 89 case basis with the "nfs_export=on" << 90 << 91 Say N unless you fully understand th << 92 << 93 config OVERLAY_FS_XINO_AUTO << 94 bool "Overlayfs: auto enable inode num << 95 default n << 96 depends on OVERLAY_FS << 97 depends on 64BIT << 98 help << 99 If this config option is enabled the << 100 unused high bits in underlying files << 101 inodes to a unified address space. << 102 might not be compatible with applica << 103 << 104 If compatibility with applications t << 105 issue, then it is safe and recommend << 106 << 107 For more information, see Documentat << 108 << 109 If unsure, say N. << 110 << 111 config OVERLAY_FS_METACOPY << 112 bool "Overlayfs: turn on metadata only << 113 depends on OVERLAY_FS << 114 select OVERLAY_FS_REDIRECT_DIR << 115 help << 116 If this config option is enabled the << 117 copy up only metadata where appropri << 118 happen when a file is opened for WRI << 119 possible to turn off this feature gl << 120 module option or on a filesystem ins << 121 "metacopy=off" mount option. << 122 << 123 Note, that this feature is not backw << 124 mounting an overlay which has metaco << 125 that doesn't support this feature wi << 126 << 127 If unsure, say N. << 128 << 129 config OVERLAY_FS_DEBUG << 130 bool "Overlayfs: turn on extra debuggi << 131 default n << 132 depends on OVERLAY_FS << 133 help << 134 Say Y here to enable extra debugging << 135 << 136 If unsure, say N. <<

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TOMOYO Linux Cross Reference
Linux/fs/overlayfs/Kconfig

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Differences between /fs/overlayfs/Kconfig (Version linux-6.12-rc7) and /fs/overlayfs/Kconfig (Version linux-4.11.12)

TOMOYO Linux Cross Reference Linux/fs/overlayfs/Kconfig

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Differences between /fs/overlayfs/Kconfig (Version linux-6.12-rc7) and /fs/overlayfs/Kconfig (Version linux-4.11.12)

TOMOYO Linux Cross Reference
Linux/fs/overlayfs/Kconfig