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fuse: improve utimes support

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Add two new flags for setattr: FATTR_ATIME_NOW and FATTR_MTIME_NOW.  These
mean, that atime or mtime should be changed to the current time.

Also it is now possible to update atime or mtime individually, not just
together.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Miklos Szeredi 2007-10-18 03:07:01 -07:00 committed by Linus Torvalds
parent d139d7ffd0
commit 17637cbaba
2 changed files with 27 additions and 3 deletions
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28
fs/fuse/dir.c
View File

@ -1014,6 +1014,20 @@ static int fuse_dir_fsync(struct file *file, struct dentry *de, int datasync)
return file ? fuse_fsync_common(file, de, datasync, 1) : 0;
}
static bool update_mtime(unsigned ivalid)
{
/* Always update if mtime is explicitly set */
if (ivalid & ATTR_MTIME_SET)
return true;
/* If it's an open(O_TRUNC) or an ftruncate(), don't update */
if ((ivalid & ATTR_SIZE) && (ivalid & (ATTR_OPEN | ATTR_FILE)))
return false;
/* In all other cases update */
return true;
}
static void iattr_to_fattr(struct iattr *iattr, struct fuse_setattr_in *arg)
{
unsigned ivalid = iattr->ia_valid;
@ -1026,11 +1040,19 @@ static void iattr_to_fattr(struct iattr *iattr, struct fuse_setattr_in *arg)
arg->valid |= FATTR_GID, arg->gid = iattr->ia_gid;
if (ivalid & ATTR_SIZE)
arg->valid |= FATTR_SIZE, arg->size = iattr->ia_size;
/* You can only _set_ these together (they may change by themselves) */
if ((ivalid & (ATTR_ATIME | ATTR_MTIME)) == (ATTR_ATIME | ATTR_MTIME)) {
arg->valid |= FATTR_ATIME | FATTR_MTIME;
if (ivalid & ATTR_ATIME) {
arg->valid |= FATTR_ATIME;
arg->atime = iattr->ia_atime.tv_sec;
arg->atimensec = iattr->ia_atime.tv_nsec;
if (!(ivalid & ATTR_ATIME_SET))
arg->valid |= FATTR_ATIME_NOW;
}
if ((ivalid & ATTR_MTIME) && update_mtime(ivalid)) {
arg->valid |= FATTR_MTIME;
arg->mtime = iattr->ia_mtime.tv_sec;
arg->mtimensec = iattr->ia_mtime.tv_nsec;
if (!(ivalid & ATTR_MTIME_SET))
arg->valid |= FATTR_MTIME_NOW;
}
}

2
include/linux/fuse.h
View File

@ -83,6 +83,8 @@ struct fuse_file_lock {
#define FATTR_ATIME (1 << 4)
#define FATTR_MTIME (1 << 5)
#define FATTR_FH (1 << 6)
#define FATTR_ATIME_NOW (1 << 7)
#define FATTR_MTIME_NOW (1 << 8)
/**
* Flags returned by the OPEN request