mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-14 15:56:41 +07:00
c3367a1b47
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>
68 lines
1.8 KiB
C
68 lines
1.8 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef _UDF_I_H
|
|
#define _UDF_I_H
|
|
|
|
struct extent_position {
|
|
struct buffer_head *bh;
|
|
uint32_t offset;
|
|
struct kernel_lb_addr block;
|
|
};
|
|
|
|
struct udf_ext_cache {
|
|
/* Extent position */
|
|
struct extent_position epos;
|
|
/* Start logical offset in bytes */
|
|
loff_t lstart;
|
|
};
|
|
|
|
/*
|
|
* The i_data_sem and i_mutex serve for protection of allocation information
|
|
* of a regular files and symlinks. This includes all extents belonging to
|
|
* the file/symlink, a fact whether data are in-inode or in external data
|
|
* blocks, preallocation, goal block information... When extents are read,
|
|
* i_mutex or i_data_sem must be held (for reading is enough in case of
|
|
* i_data_sem). When extents are changed, i_data_sem must be held for writing
|
|
* and also i_mutex must be held.
|
|
*
|
|
* For directories i_mutex is used for all the necessary protection.
|
|
*/
|
|
|
|
struct udf_inode_info {
|
|
struct timespec64 i_crtime;
|
|
/* Physical address of inode */
|
|
struct kernel_lb_addr i_location;
|
|
__u64 i_unique;
|
|
__u32 i_lenEAttr;
|
|
__u32 i_lenAlloc;
|
|
__u64 i_lenExtents;
|
|
__u32 i_next_alloc_block;
|
|
__u32 i_next_alloc_goal;
|
|
__u32 i_checkpoint;
|
|
__u32 i_extraPerms;
|
|
unsigned i_alloc_type : 3;
|
|
unsigned i_efe : 1; /* extendedFileEntry */
|
|
unsigned i_use : 1; /* unallocSpaceEntry */
|
|
unsigned i_strat4096 : 1;
|
|
unsigned i_streamdir : 1;
|
|
unsigned reserved : 25;
|
|
union {
|
|
struct short_ad *i_sad;
|
|
struct long_ad *i_lad;
|
|
__u8 *i_data;
|
|
} i_ext;
|
|
struct kernel_lb_addr i_locStreamdir;
|
|
__u64 i_lenStreams;
|
|
struct rw_semaphore i_data_sem;
|
|
struct udf_ext_cache cached_extent;
|
|
/* Spinlock for protecting extent cache */
|
|
spinlock_t i_extent_cache_lock;
|
|
struct inode vfs_inode;
|
|
};
|
|
|
|
static inline struct udf_inode_info *UDF_I(struct inode *inode)
|
|
{
|
|
return container_of(inode, struct udf_inode_info, vfs_inode);
|
|
}
|
|
|
|
#endif /* _UDF_I_H) */
|