From 17637cbaba592076c221dc045ca78422b4af6290 Mon Sep 17 00:00:00 2001 From: Miklos Szeredi Date: Thu, 18 Oct 2007 03:07:01 -0700 Subject: [PATCH] fuse: improve utimes support 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 Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- fs/fuse/dir.c | 28 +++++++++++++++++++++++++--- include/linux/fuse.h | 2 ++ 2 files changed, 27 insertions(+), 3 deletions(-) diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c index 1e941b3f2453..537d38bee13c 100644 --- a/fs/fuse/dir.c +++ b/fs/fuse/dir.c @@ -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; } } diff --git a/include/linux/fuse.h b/include/linux/fuse.h index a50d0d9ac7ae..43a77d73349c 100644 --- a/include/linux/fuse.h +++ b/include/linux/fuse.h @@ -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 -- 2.30.2