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| author |   Linus Torvalds <torvalds@linux-foundation.org> | 2014-05-21 18:59:25 +0900 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2014-05-21 18:59:25 +0900 |
| commit | 439c6109922c8faa920c9b8680d63937189d6915 (patch) | |
| tree | 686ad57dd77b9a462044e218b411ad9cdad63fb9 /include | |
| parent | Merge tag 'pci-v3.15-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci (diff) | |
| parent | sysfs: make sure read buffer is zeroed (diff) | |
| download | linux-dev-439c6109922c8faa920c9b8680d63937189d6915.tar.xz linux-dev-439c6109922c8faa920c9b8680d63937189d6915.zip | |
Merge tag 'driver-core-3.15-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core fixes from Greg KH:
"Here are two driver core (well, sysfs) fixes for 3.15-rc6 that resolve
some reported issues and a regression from 3.13"
* tag 'driver-core-3.15-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core:
sysfs: make sure read buffer is zeroed
kernfs, sysfs, cgroup: restrict extra perm check on open to sysfs
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/kernfs.h | 19 |
1 files changed, 18 insertions, 1 deletions
diff --git a/include/linux/kernfs.h b/include/linux/kernfs.h index b0122dc6f96a..ca1be5c9136c 100644 --- a/include/linux/kernfs.h +++ b/include/linux/kernfs.h @@ -50,7 +50,24 @@ enum kernfs_node_flag { /* @flags for kernfs_create_root() */ enum kernfs_root_flag { - KERNFS_ROOT_CREATE_DEACTIVATED = 0x0001, + /* + * kernfs_nodes are created in the deactivated state and invisible. + * They require explicit kernfs_activate() to become visible. This + * can be used to make related nodes become visible atomically + * after all nodes are created successfully. + */ + KERNFS_ROOT_CREATE_DEACTIVATED = 0x0001, + + /* + * For regular flies, if the opener has CAP_DAC_OVERRIDE, open(2) + * succeeds regardless of the RW permissions. sysfs had an extra + * layer of enforcement where open(2) fails with -EACCES regardless + * of CAP_DAC_OVERRIDE if the permission doesn't have the + * respective read or write access at all (none of S_IRUGO or + * S_IWUGO) or the respective operation isn't implemented. The + * following flag enables that behavior. + */ + KERNFS_ROOT_EXTRA_OPEN_PERM_CHECK = 0x0002, }; /* type-specific structures for kernfs_node union members */ |