From: Chuck Lever <[email protected]> Enable upper layers such as NFSD to retrieve case sensitivity information from file systems by adding case_insensitive and case_nonpreserving boolean fields to struct file_kattr.
The case_insensitive and case_nonpreserving fields in struct file_kattr default to false (POSIX semantics: case-sensitive and case-preserving), allowing filesystems to set them only when behavior differs from the default. Case sensitivity information is exported to userspace via the existing fa_xflags field using the new FS_XFLAG_CASEFOLD and FS_XFLAG_CASENONPRESERVING flags. Signed-off-by: Chuck Lever <[email protected]> --- fs/file_attr.c | 6 ++++++ include/linux/fileattr.h | 6 +++++- include/uapi/linux/fs.h | 2 ++ 3 files changed, 13 insertions(+), 1 deletion(-) diff --git a/fs/file_attr.c b/fs/file_attr.c index 13cdb31a3e94..2f83f3c6a170 100644 --- a/fs/file_attr.c +++ b/fs/file_attr.c @@ -84,6 +84,8 @@ int vfs_fileattr_get(struct dentry *dentry, struct file_kattr *fa) struct inode *inode = d_inode(dentry); int error; + memset(fa, 0, sizeof(*fa)); + if (!inode->i_op->fileattr_get) return -ENOIOCTLCMD; @@ -106,6 +108,10 @@ static void fileattr_to_file_attr(const struct file_kattr *fa, fattr->fa_nextents = fa->fsx_nextents; fattr->fa_projid = fa->fsx_projid; fattr->fa_cowextsize = fa->fsx_cowextsize; + if (fa->case_insensitive) + fattr->fa_xflags |= FS_XFLAG_CASEFOLD; + if (fa->case_nonpreserving) + fattr->fa_xflags |= FS_XFLAG_CASENONPRESERVING; } /** diff --git a/include/linux/fileattr.h b/include/linux/fileattr.h index f89dcfad3f8f..7f2e557255ce 100644 --- a/include/linux/fileattr.h +++ b/include/linux/fileattr.h @@ -16,7 +16,8 @@ /* Read-only inode flags */ #define FS_XFLAG_RDONLY_MASK \ - (FS_XFLAG_PREALLOC | FS_XFLAG_HASATTR) + (FS_XFLAG_PREALLOC | FS_XFLAG_HASATTR | \ + FS_XFLAG_CASEFOLD | FS_XFLAG_CASENONPRESERVING) /* Flags to indicate valid value of fsx_ fields */ #define FS_XFLAG_VALUES_MASK \ @@ -51,6 +52,9 @@ struct file_kattr { /* selectors: */ bool flags_valid:1; bool fsx_valid:1; + /* case sensitivity behavior: */ + bool case_insensitive:1; + bool case_nonpreserving:1; }; int copy_fsxattr_to_user(const struct file_kattr *fa, struct fsxattr __user *ufa); diff --git a/include/uapi/linux/fs.h b/include/uapi/linux/fs.h index 66ca526cf786..919148beaa8c 100644 --- a/include/uapi/linux/fs.h +++ b/include/uapi/linux/fs.h @@ -253,6 +253,8 @@ struct file_attr { #define FS_XFLAG_FILESTREAM 0x00004000 /* use filestream allocator */ #define FS_XFLAG_DAX 0x00008000 /* use DAX for IO */ #define FS_XFLAG_COWEXTSIZE 0x00010000 /* CoW extent size allocator hint */ +#define FS_XFLAG_CASEFOLD 0x00020000 /* case-insensitive lookups */ +#define FS_XFLAG_CASENONPRESERVING 0x00040000 /* case not preserved */ #define FS_XFLAG_HASATTR 0x80000000 /* no DIFLAG for this */ /* the read-only stuff doesn't really belong here, but any other place is -- 2.52.0 _______________________________________________ Linux-f2fs-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/linux-f2fs-devel
