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author | Eric Biggers <ebiggers@google.com> | 2018-01-16 21:44:24 -0800 |
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committer | Al Viro <viro@zeniv.linux.org.uk> | 2018-01-25 19:34:28 -0500 |
commit | 4bfd054ae11ea061685c4a2a6234fdc8e92fad41 (patch) | |
tree | 29fdb39b0fe2ce1f2b98c12d9e5ba7b14c83d964 /fs/namei.c | |
parent | e1fc742e14e01d84d9693c4aca4ab23da65811fb (diff) | |
download | linux-stable-4bfd054ae11ea061685c4a2a6234fdc8e92fad41.tar.gz linux-stable-4bfd054ae11ea061685c4a2a6234fdc8e92fad41.tar.bz2 linux-stable-4bfd054ae11ea061685c4a2a6234fdc8e92fad41.zip |
fs: fold __inode_permission() into inode_permission()
Since commit 9c630ebefeee ("ovl: simplify permission checking"),
overlayfs doesn't call __inode_permission() anymore, which leaves no
users other than inode_permission(). So just fold it back into
inode_permission().
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'fs/namei.c')
-rw-r--r-- | fs/namei.c | 71 |
1 files changed, 26 insertions, 45 deletions
diff --git a/fs/namei.c b/fs/namei.c index f0c7a7b9b6ca..29b044022e9c 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -391,50 +391,6 @@ static inline int do_inode_permission(struct inode *inode, int mask) } /** - * __inode_permission - Check for access rights to a given inode - * @inode: Inode to check permission on - * @mask: Right to check for (%MAY_READ, %MAY_WRITE, %MAY_EXEC) - * - * Check for read/write/execute permissions on an inode. - * - * When checking for MAY_APPEND, MAY_WRITE must also be set in @mask. - * - * This does not check for a read-only file system. You probably want - * inode_permission(). - */ -int __inode_permission(struct inode *inode, int mask) -{ - int retval; - - if (unlikely(mask & MAY_WRITE)) { - /* - * Nobody gets write access to an immutable file. - */ - if (IS_IMMUTABLE(inode)) - return -EPERM; - - /* - * Updating mtime will likely cause i_uid and i_gid to be - * written back improperly if their true value is unknown - * to the vfs. - */ - if (HAS_UNMAPPED_ID(inode)) - return -EACCES; - } - - retval = do_inode_permission(inode, mask); - if (retval) - return retval; - - retval = devcgroup_inode_permission(inode, mask); - if (retval) - return retval; - - return security_inode_permission(inode, mask); -} -EXPORT_SYMBOL(__inode_permission); - -/** * sb_permission - Check superblock-level permissions * @sb: Superblock of inode to check permission on * @inode: Inode to check permission on @@ -472,7 +428,32 @@ int inode_permission(struct inode *inode, int mask) retval = sb_permission(inode->i_sb, inode, mask); if (retval) return retval; - return __inode_permission(inode, mask); + + if (unlikely(mask & MAY_WRITE)) { + /* + * Nobody gets write access to an immutable file. + */ + if (IS_IMMUTABLE(inode)) + return -EPERM; + + /* + * Updating mtime will likely cause i_uid and i_gid to be + * written back improperly if their true value is unknown + * to the vfs. + */ + if (HAS_UNMAPPED_ID(inode)) + return -EACCES; + } + + retval = do_inode_permission(inode, mask); + if (retval) + return retval; + + retval = devcgroup_inode_permission(inode, mask); + if (retval) + return retval; + + return security_inode_permission(inode, mask); } EXPORT_SYMBOL(inode_permission); |