)]}' { "log": [ { "commit": "d1ee2971f5bd8a16bc5ecfe1b00e14b4fe407c4f", "tree": "733c51b66dda47216ca1526fdd85004206fd0ec8", "parents": [ "7db9cfd380205f6b50afdc3bc3619f876a5eaf0d" ], "author": { "name": "Pavel Emelyanov", "email": "xemul@openvz.org", "time": "Thu Jun 05 22:46:28 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jun 06 11:29:11 2008 -0700" }, "message": "devscgroup: make white list more compact in some cases\n\nConsider you added a \u0027c foo:bar r\u0027 permission to some cgroup and then (a\nbit later) \u0027c\u0027foo:bar w\u0027 for it. After this you\u0027ll see the\n\nc foo:bar r\nc foo:bar w\n\nlines in a devices.list file.\n\nAnother example - consider you added 10 \u0027c foo:bar r\u0027 permissions to some\ncgroup (e.g. by mistake). After this you\u0027ll see 10 c foo:bar r lines in\na list file.\n\nThis is weird. This situation also has one more annoying consequence.\nHaving many items in a white list makes permissions checking slower, sine\nit has to walk a longer list.\n\nThe proposal is to merge permissions for items, that correspond to the\nsame device.\n\nSigned-off-by: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nAcked-by: Serge Hallyn \u003cserue@us.ibm.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "cc9cb219aac24ffc711566c8f372c2b3a3bf840f", "tree": "efa678227596922a00b2a7744c33707041c78316", "parents": [ "b66862f7663332aa1ecb3ebda4086360ddb8befc" ], "author": { "name": "Pavel Emelyanov", "email": "xemul@openvz.org", "time": "Thu Jun 05 22:46:26 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jun 06 11:29:11 2008 -0700" }, "message": "devscgroup: relax task to dev_cgroup conversion\n\nTwo functions, that need to get a device_cgroup from a task (they are\ndevcgroup_inode_permission and devcgroup_inode_mknod) make it in a strange\nway:\n\nThey get a css_set from task, then a subsys_state from css_set, then a\ncgroup from the state and then a subsys_state again from the cgroup.\nBesides, the devices_subsys_id is read from memory, whilst there\u0027s a\nenum-ed constant for it.\n\nOptimize this part a bit:\n1. Get the subsys_stats form the task and be done - no 2 extra\n dereferences,\n2. Use the device_subsys_id constant, not the value from memory\n (i.e. one less dereference).\n\nFound while preparing 2.6.26 OpenVZ port.\n\nSigned-off-by: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nAcked-by: Serge Hallyn \u003cserue@us.ibm.com\u003e\nAcked-by: Paul Menage \u003cmenage@google.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: James Morris \u003cjmorris@namei.org\u003e\nCc: Chris Wright \u003cchrisw@sous-sol.org\u003e\nCc: Stephen Smalley \u003csds@tycho.nsa.gov\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "b66862f7663332aa1ecb3ebda4086360ddb8befc", "tree": "8ba5a907f4bafad460cef4d6c573b9f5aae957e5", "parents": [ "93b071139a956e51c98cdefd50a47981a4eb852e" ], "author": { "name": "Pavel Emelyanov", "email": "xemul@openvz.org", "time": "Thu Jun 05 22:46:24 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Fri Jun 06 11:29:11 2008 -0700" }, "message": "devcgroup: make a helper to convert cgroup_subsys_state to devs_cgroup\n\nThis is just picking the container_of out of cgroup_to_devcgroup into a\nseparate function.\n\nThis new css_to_devcgroup will be used in the 2nd patch.\n\nSigned-off-by: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nAcked-by: Serge Hallyn \u003cserue@us.ibm.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: James Morris \u003cjmorris@namei.org\u003e\nCc: Chris Wright \u003cchrisw@sous-sol.org\u003e\nCc: Stephen Smalley \u003csds@tycho.nsa.gov\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "29486df325e1fe6e1764afcb19e3370804c2b002", "tree": "d69a96bb829940f3ae5171fde481edb20a9e468a", "parents": [ "28fd5dfc12bde391981dfdcf20755952b6e916af" ], "author": { "name": "Serge E. Hallyn", "email": "serue@us.ibm.com", "time": "Tue Apr 29 01:00:14 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Apr 29 08:06:10 2008 -0700" }, "message": "cgroups: introduce cft-\u003eread_seq()\n\nIntroduce a read_seq() helper in cftype, which uses seq_file to print out\nlists. Use it in the devices cgroup. Also split devices.allow into two\nfiles, so now devices.deny and devices.allow are the ones to use to manipulate\nthe whitelist, while devices.list outputs the cgroup\u0027s current whitelist.\n\nSigned-off-by: Serge E. Hallyn \u003cserue@us.ibm.com\u003e\nAcked-by: Paul Menage \u003cmenage@google.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" }, { "commit": "08ce5f16ee466ffc5bf243800deeecd77d9eaf50", "tree": "8fb921137a677d463f11727dab7e683db426b810", "parents": [ "d447ea2f30ec60370ddb99a668e5ac12995f043d" ], "author": { "name": "Serge E. Hallyn", "email": "serue@us.ibm.com", "time": "Tue Apr 29 01:00:10 2008 -0700" }, "committer": { "name": "Linus Torvalds", "email": "torvalds@linux-foundation.org", "time": "Tue Apr 29 08:06:09 2008 -0700" }, "message": "cgroups: implement device whitelist\n\nImplement a cgroup to track and enforce open and mknod restrictions on device\nfiles. A device cgroup associates a device access whitelist with each cgroup.\n A whitelist entry has 4 fields. \u0027type\u0027 is a (all), c (char), or b (block).\n\u0027all\u0027 means it applies to all types and all major and minor numbers. Major\nand minor are either an integer or * for all. Access is a composition of r\n(read), w (write), and m (mknod).\n\nThe root device cgroup starts with rwm to \u0027all\u0027. A child devcg gets a copy of\nthe parent. Admins can then remove devices from the whitelist or add new\nentries. A child cgroup can never receive a device access which is denied its\nparent. However when a device access is removed from a parent it will not\nalso be removed from the child(ren).\n\nAn entry is added using devices.allow, and removed using\ndevices.deny. For instance\n\n\techo \u0027c 1:3 mr\u0027 \u003e /cgroups/1/devices.allow\n\nallows cgroup 1 to read and mknod the device usually known as\n/dev/null. Doing\n\n\techo a \u003e /cgroups/1/devices.deny\n\nwill remove the default \u0027a *:* mrw\u0027 entry.\n\nCAP_SYS_ADMIN is needed to change permissions or move another task to a new\ncgroup. A cgroup may not be granted more permissions than the cgroup\u0027s parent\nhas. Any task can move itself between cgroups. This won\u0027t be sufficient, but\nwe can decide the best way to adequately restrict movement later.\n\n[akpm@linux-foundation.org: coding-style fixes]\n[akpm@linux-foundation.org: fix may-be-used-uninitialized warning]\nSigned-off-by: Serge E. Hallyn \u003cserue@us.ibm.com\u003e\nAcked-by: James Morris \u003cjmorris@namei.org\u003e\nLooks-good-to: Pavel Emelyanov \u003cxemul@openvz.org\u003e\nCc: Daniel Hokka Zakrisson \u003cdaniel@hozac.com\u003e\nCc: Li Zefan \u003clizf@cn.fujitsu.com\u003e\nCc: Paul Menage \u003cmenage@google.com\u003e\nCc: Balbir Singh \u003cbalbir@in.ibm.com\u003e\nCc: KAMEZAWA Hiroyuki \u003ckamezawa.hiroyu@jp.fujitsu.com\u003e\nSigned-off-by: Andrew Morton \u003cakpm@linux-foundation.org\u003e\nSigned-off-by: Linus Torvalds \u003ctorvalds@linux-foundation.org\u003e\n" } ] }