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| author | Theodore Ts'o <tytso@mit.edu> | 2022-07-15 04:59:12 +0300 |
|---|---|---|
| committer | akpm <akpm@linux-foundation.org> | 2022-07-30 04:07:15 +0300 |
| commit | e408e695f5f1f60d784913afc45ff2c387a5aeb8 (patch) | |
| tree | 0a683ca610f0686e5e63d6291ef95ac63541a51b /include/linux/shmem_fs.h | |
| parent | 188043c7f4f2bd662f2a55957d684fffa543e600 (diff) | |
| download | linux-e408e695f5f1f60d784913afc45ff2c387a5aeb8.tar.xz | |
mm/shmem: support FS_IOC_[SG]ETFLAGS in tmpfs
This allows userspace to set flags like FS_APPEND_FL, FS_IMMUTABLE_FL,
FS_NODUMP_FL, etc., like all other standard Linux file systems.
[akpm@linux-foundation.org: fix CONFIG_TMPFS_XATTR=n warnings]
Link: https://lkml.kernel.org/r/20220715015912.2560575-1-tytso@mit.edu
Signed-off-by: Theodore Ts'o <tytso@mit.edu>
Cc: Hugh Dickins <hughd@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'include/linux/shmem_fs.h')
| -rw-r--r-- | include/linux/shmem_fs.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/shmem_fs.h b/include/linux/shmem_fs.h index a68f982f22d1..1b6c4013f691 100644 --- a/include/linux/shmem_fs.h +++ b/include/linux/shmem_fs.h @@ -25,9 +25,20 @@ struct shmem_inode_info { struct simple_xattrs xattrs; /* list of xattrs */ atomic_t stop_eviction; /* hold when working on inode */ struct timespec64 i_crtime; /* file creation time */ + unsigned int fsflags; /* flags for FS_IOC_[SG]ETFLAGS */ struct inode vfs_inode; }; +#define SHMEM_FL_USER_VISIBLE FS_FL_USER_VISIBLE +#define SHMEM_FL_USER_MODIFIABLE FS_FL_USER_MODIFIABLE +#define SHMEM_FL_INHERITED FS_FL_USER_MODIFIABLE + +/* Flags that are appropriate for regular files (all but dir-specific ones). */ +#define SHMEM_REG_FLMASK (~(FS_DIRSYNC_FL | FS_TOPDIR_FL)) + +/* Flags that are appropriate for non-directories/regular files. */ +#define SHMEM_OTHER_FLMASK (FS_NODUMP_FL | FS_NOATIME_FL) + struct shmem_sb_info { unsigned long max_blocks; /* How many blocks are allowed */ struct percpu_counter used_blocks; /* How many are allocated */ |