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authorSteven J. Magnani <steve.magnani@digidescorp.com>2019-08-27 14:13:59 +0200
committerJan Kara <jack@suse.cz>2019-08-27 15:38:46 +0200
commitc3367a1b47d590f97109cd4b5189e750fb26c0f1 (patch)
tree8f29eb87d3375f3ff048b3384bef9692bde86367 /fs/udf/udfdecl.h
parentudf: Use dynamic debug infrastructure (diff)
downloadlinux-c3367a1b47d590f97109cd4b5189e750fb26c0f1.tar.xz
linux-c3367a1b47d590f97109cd4b5189e750fb26c0f1.zip
udf: augment UDF permissions on new inodes
Windows presents files created within Linux as read-only, even when permissions in Linux indicate the file should be writable. UDF defines a slightly different set of basic file permissions than Linux. Specifically, UDF has "delete" and "change attribute" permissions for each access class (user/group/other). Linux has no equivalents for these. When the Linux UDF driver creates a file (or directory), no UDF delete or change attribute permissions are granted. The lack of delete permission appears to cause Windows to mark an item read-only when its permissions otherwise indicate that it should be read-write. Fix this by having UDF delete permissions track Linux write permissions. Also grant UDF change attribute permission to the owner when creating a new inode. Reported by: Ty Young Signed-off-by: Steven J. Magnani <steve@digidescorp.com> Link: https://lore.kernel.org/r/20190827121359.9954-1-steve@digidescorp.com Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/udf/udfdecl.h')
-rw-r--r--fs/udf/udfdecl.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/fs/udf/udfdecl.h b/fs/udf/udfdecl.h
index 65e243ebeb9c..9dd0814f1077 100644
--- a/fs/udf/udfdecl.h
+++ b/fs/udf/udfdecl.h
@@ -170,6 +170,7 @@ extern int8_t udf_next_aext(struct inode *, struct extent_position *,
struct kernel_lb_addr *, uint32_t *, int);
extern int8_t udf_current_aext(struct inode *, struct extent_position *,
struct kernel_lb_addr *, uint32_t *, int);
+extern void udf_update_extra_perms(struct inode *inode, umode_t mode);
/* misc.c */
extern struct buffer_head *udf_tgetblk(struct super_block *sb,