diff options
| author | NeilBrown <neilb@suse.de> | 2014-12-15 12:57:00 +1100 |
|---|---|---|
| committer | NeilBrown <neilb@suse.de> | 2015-02-06 09:32:56 +1100 |
| commit | 1e594bb24d3d08fe4a8afa0fc45a61d6109130fa (patch) | |
| tree | 955a41742e096370d91290fcae6efb94770e10a5 /drivers/md/md.c | |
| parent | f4ad3d38d49dc0c4c911e31d8b884d5b74362b6e (diff) | |
md: tidy up set_bitmap_file
1/ delay setting mddev->bitmap_info.file until 'f' looks
usable, so we don't have to unset it.
2/ Don't allow bitmap file to be set if bitmap_info.file
is already set.
Signed-off-by: NeilBrown <neilb@suse.de>
Diffstat (limited to 'drivers/md/md.c')
| -rw-r--r-- | drivers/md/md.c | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/drivers/md/md.c b/drivers/md/md.c index bddecc01c333..72c44d337ee2 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -5851,22 +5851,24 @@ static int set_bitmap_file(struct mddev *mddev, int fd) if (fd >= 0) { struct inode *inode; - if (mddev->bitmap) + struct file *f; + + if (mddev->bitmap || mddev->bitmap_info.file) return -EEXIST; /* cannot add when bitmap is present */ - mddev->bitmap_info.file = fget(fd); + f = fget(fd); - if (mddev->bitmap_info.file == NULL) { + if (f == NULL) { printk(KERN_ERR "%s: error: failed to get bitmap file\n", mdname(mddev)); return -EBADF; } - inode = mddev->bitmap_info.file->f_mapping->host; + inode = f->f_mapping->host; if (!S_ISREG(inode->i_mode)) { printk(KERN_ERR "%s: error: bitmap file must be a regular file\n", mdname(mddev)); err = -EBADF; - } else if (!(mddev->bitmap_info.file->f_mode & FMODE_WRITE)) { + } else if (!(f->f_mode & FMODE_WRITE)) { printk(KERN_ERR "%s: error: bitmap file must open for write\n", mdname(mddev)); err = -EBADF; @@ -5876,10 +5878,10 @@ static int set_bitmap_file(struct mddev *mddev, int fd) err = -EBUSY; } if (err) { - fput(mddev->bitmap_info.file); - mddev->bitmap_info.file = NULL; + fput(f); return err; } + mddev->bitmap_info.file = f; mddev->bitmap_info.offset = 0; /* file overrides offset */ } else if (mddev->bitmap == NULL) return -ENOENT; /* cannot remove what isn't there */ |