| Message ID | 1438689218-6921-2-git-send-email-agruenba@redhat.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Tue, Aug 04, 2015 at 01:52:59PM +0200, Andreas Gruenbacher wrote: > The vfs does not apply the umask for file systems that support acls. The > test used for this used to be called IS_POSIXACL(). Switch to a new > IS_ACL() test to check for either posix acls or richacls instead. Add a new > MS_RICHACL flag and IS_RICHACL() test for richacls alone. The IS_POSIXACL() > test is still needed by file systems that specifically support POSIX ACLs, > like nfsd. Nit: nfsd's not a filesystem. Maybe just list the users instead. --b. > > Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> > --- > fs/Kconfig | 3 +++ > fs/namei.c | 8 ++++---- > include/linux/fs.h | 12 ++++++++++++ > include/uapi/linux/fs.h | 3 ++- > 4 files changed, 21 insertions(+), 5 deletions(-) > > diff --git a/fs/Kconfig b/fs/Kconfig > index 011f433..3e09c06 100644 > --- a/fs/Kconfig > +++ b/fs/Kconfig > @@ -59,6 +59,9 @@ endif # BLOCK > config FS_POSIX_ACL > def_bool n > > +config FS_RICHACL > + def_bool n > + > config EXPORTFS > tristate > > diff --git a/fs/namei.c b/fs/namei.c > index fbbcf09..8f3db24 100644 > --- a/fs/namei.c > +++ b/fs/namei.c > @@ -2771,7 +2771,7 @@ static int atomic_open(struct nameidata *nd, struct dentry *dentry, > } > > mode = op->mode; > - if ((open_flag & O_CREAT) && !IS_POSIXACL(dir)) > + if ((open_flag & O_CREAT) && !IS_ACL(dir)) > mode &= ~current_umask(); > > excl = (open_flag & (O_EXCL | O_CREAT)) == (O_EXCL | O_CREAT); > @@ -2955,7 +2955,7 @@ static int lookup_open(struct nameidata *nd, struct path *path, > /* Negative dentry, just create the file */ > if (!dentry->d_inode && (op->open_flag & O_CREAT)) { > umode_t mode = op->mode; > - if (!IS_POSIXACL(dir->d_inode)) > + if (!IS_ACL(dir->d_inode)) > mode &= ~current_umask(); > /* > * This write is needed to ensure that a > @@ -3526,7 +3526,7 @@ retry: > if (IS_ERR(dentry)) > return PTR_ERR(dentry); > > - if (!IS_POSIXACL(path.dentry->d_inode)) > + if (!IS_ACL(path.dentry->d_inode)) > mode &= ~current_umask(); > error = security_path_mknod(&path, dentry, mode, dev); > if (error) > @@ -3595,7 +3595,7 @@ retry: > if (IS_ERR(dentry)) > return PTR_ERR(dentry); > > - if (!IS_POSIXACL(path.dentry->d_inode)) > + if (!IS_ACL(path.dentry->d_inode)) > mode &= ~current_umask(); > error = security_path_mkdir(&path, dentry, mode); > if (!error) > diff --git a/include/linux/fs.h b/include/linux/fs.h > index cc008c3..44e696e 100644 > --- a/include/linux/fs.h > +++ b/include/linux/fs.h > @@ -1770,6 +1770,12 @@ struct super_operations { > #define IS_IMMUTABLE(inode) ((inode)->i_flags & S_IMMUTABLE) > #define IS_POSIXACL(inode) __IS_FLG(inode, MS_POSIXACL) > > +#ifdef CONFIG_FS_RICHACL > +#define IS_RICHACL(inode) __IS_FLG(inode, MS_RICHACL) > +#else > +#define IS_RICHACL(inode) 0 > +#endif > + > #define IS_DEADDIR(inode) ((inode)->i_flags & S_DEAD) > #define IS_NOCMTIME(inode) ((inode)->i_flags & S_NOCMTIME) > #define IS_SWAPFILE(inode) ((inode)->i_flags & S_SWAPFILE) > @@ -1783,6 +1789,12 @@ struct super_operations { > (inode)->i_rdev == WHITEOUT_DEV) > > /* > + * IS_ACL() tells the VFS to not apply the umask > + * and use check_acl for acl permission checks when defined. > + */ > +#define IS_ACL(inode) __IS_FLG(inode, MS_POSIXACL | MS_RICHACL) > + > +/* > * Inode state bits. Protected by inode->i_lock > * > * Three bits determine the dirty state of the inode, I_DIRTY_SYNC, > diff --git a/include/uapi/linux/fs.h b/include/uapi/linux/fs.h > index 9b964a5..6ac6bc9 100644 > --- a/include/uapi/linux/fs.h > +++ b/include/uapi/linux/fs.h > @@ -81,7 +81,7 @@ struct inodes_stat_t { > #define MS_VERBOSE 32768 /* War is peace. Verbosity is silence. > MS_VERBOSE is deprecated. */ > #define MS_SILENT 32768 > -#define MS_POSIXACL (1<<16) /* VFS does not apply the umask */ > +#define MS_POSIXACL (1<<16) /* Supports POSIX ACLs */ > #define MS_UNBINDABLE (1<<17) /* change to unbindable */ > #define MS_PRIVATE (1<<18) /* change to private */ > #define MS_SLAVE (1<<19) /* change to slave */ > @@ -91,6 +91,7 @@ struct inodes_stat_t { > #define MS_I_VERSION (1<<23) /* Update inode I_version field */ > #define MS_STRICTATIME (1<<24) /* Always perform atime updates */ > #define MS_LAZYTIME (1<<25) /* Update the on-disk [acm]times lazily */ > +#define MS_RICHACL (1<<26) /* Supports richacls */ > > /* These sb flags are internal to the kernel */ > #define MS_NOSEC (1<<28) > -- > 2.5.0 > > -- > To unsubscribe from this list: send the line "unsubscribe linux-nfs" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-cifs" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/fs/Kconfig b/fs/Kconfig index 011f433..3e09c06 100644 --- a/fs/Kconfig +++ b/fs/Kconfig @@ -59,6 +59,9 @@ endif # BLOCK config FS_POSIX_ACL def_bool n +config FS_RICHACL + def_bool n + config EXPORTFS tristate diff --git a/fs/namei.c b/fs/namei.c index fbbcf09..8f3db24 100644 --- a/fs/namei.c +++ b/fs/namei.c @@ -2771,7 +2771,7 @@ static int atomic_open(struct nameidata *nd, struct dentry *dentry, } mode = op->mode; - if ((open_flag & O_CREAT) && !IS_POSIXACL(dir)) + if ((open_flag & O_CREAT) && !IS_ACL(dir)) mode &= ~current_umask(); excl = (open_flag & (O_EXCL | O_CREAT)) == (O_EXCL | O_CREAT); @@ -2955,7 +2955,7 @@ static int lookup_open(struct nameidata *nd, struct path *path, /* Negative dentry, just create the file */ if (!dentry->d_inode && (op->open_flag & O_CREAT)) { umode_t mode = op->mode; - if (!IS_POSIXACL(dir->d_inode)) + if (!IS_ACL(dir->d_inode)) mode &= ~current_umask(); /* * This write is needed to ensure that a @@ -3526,7 +3526,7 @@ retry: if (IS_ERR(dentry)) return PTR_ERR(dentry); - if (!IS_POSIXACL(path.dentry->d_inode)) + if (!IS_ACL(path.dentry->d_inode)) mode &= ~current_umask(); error = security_path_mknod(&path, dentry, mode, dev); if (error) @@ -3595,7 +3595,7 @@ retry: if (IS_ERR(dentry)) return PTR_ERR(dentry); - if (!IS_POSIXACL(path.dentry->d_inode)) + if (!IS_ACL(path.dentry->d_inode)) mode &= ~current_umask(); error = security_path_mkdir(&path, dentry, mode); if (!error) diff --git a/include/linux/fs.h b/include/linux/fs.h index cc008c3..44e696e 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -1770,6 +1770,12 @@ struct super_operations { #define IS_IMMUTABLE(inode) ((inode)->i_flags & S_IMMUTABLE) #define IS_POSIXACL(inode) __IS_FLG(inode, MS_POSIXACL) +#ifdef CONFIG_FS_RICHACL +#define IS_RICHACL(inode) __IS_FLG(inode, MS_RICHACL) +#else +#define IS_RICHACL(inode) 0 +#endif + #define IS_DEADDIR(inode) ((inode)->i_flags & S_DEAD) #define IS_NOCMTIME(inode) ((inode)->i_flags & S_NOCMTIME) #define IS_SWAPFILE(inode) ((inode)->i_flags & S_SWAPFILE) @@ -1783,6 +1789,12 @@ struct super_operations { (inode)->i_rdev == WHITEOUT_DEV) /* + * IS_ACL() tells the VFS to not apply the umask + * and use check_acl for acl permission checks when defined. + */ +#define IS_ACL(inode) __IS_FLG(inode, MS_POSIXACL | MS_RICHACL) + +/* * Inode state bits. Protected by inode->i_lock * * Three bits determine the dirty state of the inode, I_DIRTY_SYNC, diff --git a/include/uapi/linux/fs.h b/include/uapi/linux/fs.h index 9b964a5..6ac6bc9 100644 --- a/include/uapi/linux/fs.h +++ b/include/uapi/linux/fs.h @@ -81,7 +81,7 @@ struct inodes_stat_t { #define MS_VERBOSE 32768 /* War is peace. Verbosity is silence. MS_VERBOSE is deprecated. */ #define MS_SILENT 32768 -#define MS_POSIXACL (1<<16) /* VFS does not apply the umask */ +#define MS_POSIXACL (1<<16) /* Supports POSIX ACLs */ #define MS_UNBINDABLE (1<<17) /* change to unbindable */ #define MS_PRIVATE (1<<18) /* change to private */ #define MS_SLAVE (1<<19) /* change to slave */ @@ -91,6 +91,7 @@ struct inodes_stat_t { #define MS_I_VERSION (1<<23) /* Update inode I_version field */ #define MS_STRICTATIME (1<<24) /* Always perform atime updates */ #define MS_LAZYTIME (1<<25) /* Update the on-disk [acm]times lazily */ +#define MS_RICHACL (1<<26) /* Supports richacls */ /* These sb flags are internal to the kernel */ #define MS_NOSEC (1<<28)
The vfs does not apply the umask for file systems that support acls. The test used for this used to be called IS_POSIXACL(). Switch to a new IS_ACL() test to check for either posix acls or richacls instead. Add a new MS_RICHACL flag and IS_RICHACL() test for richacls alone. The IS_POSIXACL() test is still needed by file systems that specifically support POSIX ACLs, like nfsd. Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com> --- fs/Kconfig | 3 +++ fs/namei.c | 8 ++++---- include/linux/fs.h | 12 ++++++++++++ include/uapi/linux/fs.h | 3 ++- 4 files changed, 21 insertions(+), 5 deletions(-)