diff options
| -rw-r--r-- | drivers/md/bitmap.c | 1 | ||||
| -rw-r--r-- | drivers/md/md.c | 49 | ||||
| -rw-r--r-- | drivers/md/md.h | 1 |
3 files changed, 16 insertions, 35 deletions
diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c index 4195a01b1535..9a8e66ae04f5 100644 --- a/drivers/md/bitmap.c +++ b/drivers/md/bitmap.c @@ -1988,7 +1988,6 @@ location_store(struct mddev *mddev, const char *buf, size_t len) if (mddev->bitmap_info.file) { struct file *f = mddev->bitmap_info.file; mddev->bitmap_info.file = NULL; - restore_bitmap_write_access(f); fput(f); } } else { diff --git a/drivers/md/md.c b/drivers/md/md.c index 4ad5cc4e63e8..3fa2fc0a5dd2 100644 --- a/drivers/md/md.c +++ b/drivers/md/md.c @@ -5181,32 +5181,6 @@ static int restart_array(struct mddev *mddev) return 0; } -/* similar to deny_write_access, but accounts for our holding a reference - * to the file ourselves */ -static int deny_bitmap_write_access(struct file * file) -{ - struct inode *inode = file->f_mapping->host; - - spin_lock(&inode->i_lock); - if (atomic_read(&inode->i_writecount) > 1) { - spin_unlock(&inode->i_lock); - return -ETXTBSY; - } - atomic_set(&inode->i_writecount, -1); - spin_unlock(&inode->i_lock); - - return 0; -} - -void restore_bitmap_write_access(struct file *file) -{ - struct inode *inode = file->f_mapping->host; - - spin_lock(&inode->i_lock); - atomic_set(&inode->i_writecount, 1); - spin_unlock(&inode->i_lock); -} - static void md_clean(struct mddev *mddev) { mddev->array_sectors = 0; @@ -5427,7 +5401,6 @@ static int do_md_stop(struct mddev * mddev, int mode, bitmap_destroy(mddev); if (mddev->bitmap_info.file) { - restore_bitmap_write_access(mddev->bitmap_info.file); fput(mddev->bitmap_info.file); mddev->bitmap_info.file = NULL; } @@ -5979,7 +5952,7 @@ abort_export: static int set_bitmap_file(struct mddev *mddev, int fd) { - int err; + int err = 0; if (mddev->pers) { if (!mddev->pers->quiesce) @@ -5991,6 +5964,7 @@ static int set_bitmap_file(struct mddev *mddev, int fd) if (fd >= 0) { + struct inode *inode; if (mddev->bitmap) return -EEXIST; /* cannot add when bitmap is present */ mddev->bitmap_info.file = fget(fd); @@ -6001,10 +5975,21 @@ static int set_bitmap_file(struct mddev *mddev, int fd) return -EBADF; } - err = deny_bitmap_write_access(mddev->bitmap_info.file); - if (err) { + inode = mddev->bitmap_info.file->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)) { + printk(KERN_ERR "%s: error: bitmap file must open for write\n", + mdname(mddev)); + err = -EBADF; + } else if (atomic_read(&inode->i_writecount) != 1) { printk(KERN_ERR "%s: error: bitmap file is already in use\n", mdname(mddev)); + err = -EBUSY; + } + if (err) { fput(mddev->bitmap_info.file); mddev->bitmap_info.file = NULL; return err; @@ -6027,10 +6012,8 @@ static int set_bitmap_file(struct mddev *mddev, int fd) mddev->pers->quiesce(mddev, 0); } if (fd < 0) { - if (mddev->bitmap_info.file) { - restore_bitmap_write_access(mddev->bitmap_info.file); + if (mddev->bitmap_info.file) fput(mddev->bitmap_info.file); - } mddev->bitmap_info.file = NULL; } diff --git a/drivers/md/md.h b/drivers/md/md.h index 07bba96de260..a49d991f3fe1 100644 --- a/drivers/md/md.h +++ b/drivers/md/md.h @@ -605,7 +605,6 @@ extern int md_check_no_bitmap(struct mddev *mddev); extern int md_integrity_register(struct mddev *mddev); extern void md_integrity_add_rdev(struct md_rdev *rdev, struct mddev *mddev); extern int strict_strtoul_scaled(const char *cp, unsigned long *res, int scale); -extern void restore_bitmap_write_access(struct file *file); extern void mddev_init(struct mddev *mddev); extern int md_run(struct mddev *mddev); |