diff options
70 files changed, 907 insertions, 758 deletions
diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking index 2ca3d17eee56..f91926f2f482 100644 --- a/Documentation/filesystems/Locking +++ b/Documentation/filesystems/Locking @@ -164,8 +164,6 @@ the block device inode. See there for more details. --------------------------- file_system_type --------------------------- prototypes: - int (*get_sb) (struct file_system_type *, int, - const char *, void *, struct vfsmount *); struct dentry *(*mount) (struct file_system_type *, int, const char *, void *); void (*kill_sb) (struct super_block *); diff --git a/Documentation/filesystems/overlayfs.txt b/Documentation/filesystems/overlayfs.txt index a27c950ece61..6db0e5d1da07 100644 --- a/Documentation/filesystems/overlayfs.txt +++ b/Documentation/filesystems/overlayfs.txt @@ -159,6 +159,22 @@ overlay filesystem (though an operation on the name of the file such as rename or unlink will of course be noticed and handled). +Multiple lower layers +--------------------- + +Multiple lower layers can now be given using the the colon (":") as a +separator character between the directory names. For example: + + mount -t overlay overlay -olowerdir=/lower1:/lower2:/lower3 /merged + +As the example shows, "upperdir=" and "workdir=" may be omitted. In +that case the overlay will be read-only. + +The specified lower directories will be stacked beginning from the +rightmost one and going left. In the above example lower1 will be the +top, lower2 the middle and lower3 the bottom layer. + + Non-standard behavior --------------------- @@ -196,3 +212,15 @@ Changes to the underlying filesystems while part of a mounted overlay filesystem are not allowed. If the underlying filesystem is changed, the behavior of the overlay is undefined, though it will not result in a crash or deadlock. + +Testsuite +--------- + +There's testsuite developed by David Howells at: + + git://git.infradead.org/users/dhowells/unionmount-testsuite.git + +Run as root: + + # cd unionmount-testsuite + # ./run --ov diff --git a/arch/s390/hypfs/inode.c b/arch/s390/hypfs/inode.c index 4c8008dd938e..99824ff8dd35 100644 --- a/arch/s390/hypfs/inode.c +++ b/arch/s390/hypfs/inode.c @@ -74,7 +74,7 @@ static void hypfs_remove(struct dentry *dentry) parent = dentry->d_parent; mutex_lock(&parent->d_inode->i_mutex); if (hypfs_positive(dentry)) { - if (S_ISDIR(dentry->d_inode->i_mode)) + if (d_is_dir(dentry)) simple_rmdir(parent->d_inode, dentry); else simple_unlink(parent->d_inode, dentry); @@ -144,36 +144,32 @@ static int hypfs_open(struct inode *inode, struct file *filp) return nonseekable_open(inode, filp); } -static ssize_t hypfs_aio_read(struct kiocb *iocb, const struct iovec *iov, - unsigned long nr_segs, loff_t offset) +static ssize_t hypfs_read_iter(struct kiocb *iocb, struct iov_iter *to) { - char *data; - ssize_t ret; - struct file *filp = iocb->ki_filp; - /* XXX: temporary */ - char __user *buf = iov[0].iov_base; - size_t count = iov[0].iov_len; - - if (nr_segs != 1) - return -EINVAL; - - data = filp->private_data; - ret = simple_read_from_buffer(buf, count, &offset, data, strlen(data)); - if (ret <= 0) - return ret; + struct file *file = iocb->ki_filp; + char *data = file->private_data; + size_t available = strlen(data); + loff_t pos = iocb->ki_pos; + size_t count; - iocb->ki_pos += ret; - file_accessed(filp); - - return ret; + if (pos < 0) + return -EINVAL; + if (pos >= available || !iov_iter_count(to)) + return 0; + count = copy_to_iter(data + pos, available - pos, to); + if (!count) + return -EFAULT; + iocb->ki_pos = pos + count; + file_accessed(file); + return count; } -static ssize_t hypfs_aio_write(struct kiocb *iocb, const struct iovec *iov, - unsigned long nr_segs, loff_t offset) + +static ssize_t hypfs_write_iter(struct kiocb *iocb, struct iov_iter *from) { int rc; struct super_block *sb = file_inode(iocb->ki_filp)->i_sb; struct hypfs_sb_info *fs_info = sb->s_fs_info; - size_t count = iov_length(iov, nr_segs); + size_t count = iov_iter_count(from); /* * Currently we only allow one update per second for two reasons: @@ -202,6 +198,7 @@ static ssize_t hypfs_aio_write(struct kiocb *iocb, const struct iovec *iov, } hypfs_update_update(sb); rc = count; + iov_iter_advance(from, count); out: mutex_unlock(&fs_info->lock); return rc; @@ -440,10 +437,10 @@ struct dentry *hypfs_create_str(struct dentry *dir, static const struct file_operations hypfs_file_ops = { .open = hypfs_open, .release = hypfs_release, - .read = do_sync_read, - .write = do_sync_write, - .aio_read = hypfs_aio_read, - .aio_write = hypfs_aio_write, + .read = new_sync_read, + .write = new_sync_write, + .read_iter = hypfs_read_iter, + .write_iter = hypfs_write_iter, .llseek = no_llseek, }; diff --git a/drivers/infiniband/hw/ipath/ipath_fs.c b/drivers/infiniband/hw/ipath/ipath_fs.c index 4977082e081f..33c45dfcbd88 100644 --- a/drivers/infiniband/hw/ipath/ipath_fs.c +++ b/drivers/infiniband/hw/ipath/ipath_fs.c @@ -277,7 +277,7 @@ static int remove_file(struct dentry *parent, char *name) } spin_lock(&tmp->d_lock); - if (!(d_unhashed(tmp) && tmp->d_inode)) { + if (!d_unhashed(tmp) && tmp->d_inode) { dget_dlock(tmp); __d_drop(tmp); spin_unlock(&tmp->d_lock); diff --git a/drivers/infiniband/hw/qib/qib_fs.c b/drivers/infiniband/hw/qib/qib_fs.c index 55f240a363fe..650897a8591e 100644 --- a/drivers/infiniband/hw/qib/qib_fs.c +++ b/drivers/infiniband/hw/qib/qib_fs.c @@ -455,7 +455,7 @@ static int remove_file(struct dentry *parent, char *name) } spin_lock(&tmp->d_lock); - if (!(d_unhashed(tmp) && tmp->d_inode)) { + if (!d_unhashed(tmp) && tmp->d_inode) { __d_drop(tmp); spin_unlock(&tmp->d_lock); simple_unlink(parent->d_inode, tmp); diff --git a/drivers/staging/lustre/lustre/llite/dcache.c b/drivers/staging/lustre/lustre/llite/dcache.c index 88614b71cf6d..ddf1fa9f67f8 100644 --- a/drivers/staging/lustre/lustre/llite/dcache.c +++ b/drivers/staging/lustre/lustre/llite/dcache.c @@ -270,7 +270,7 @@ void ll_invalidate_aliases(struct inode *inode) int ll_revalidate_it_finish(struct ptlrpc_request *request, struct lookup_intent *it, - struct dentry *de) + struct inode *inode) { int rc = 0; @@ -280,19 +280,17 @@ int ll_revalidate_it_finish(struct ptlrpc_request *request, if (it_disposition(it, DISP_LOOKUP_NEG)) return -ENOENT; - rc = ll_prep_inode(&de->d_inode, request, NULL, it); + rc = ll_prep_inode(&inode, request, NULL, it); return rc; } -void ll_lookup_finish_locks(struct lookup_intent *it, struct dentry *dentry) +void ll_lookup_finish_locks(struct lookup_intent *it, struct inode *inode) { LASSERT(it != NULL); - LASSERT(dentry != NULL); - if (it->d.lustre.it_lock_mode && dentry->d_inode != NULL) { - struct inode *inode = dentry->d_inode; - struct ll_sb_info *sbi = ll_i2sbi(dentry->d_inode); + if (it->d.lustre.it_lock_mode && inode != NULL) { + struct ll_sb_info *sbi = ll_i2sbi(inode); CDEBUG(D_DLMTRACE, "setting l_data to inode %p (%lu/%u)\n", inode, inode->i_ino, inode->i_generation); diff --git a/drivers/staging/lustre/lustre/llite/file.c b/drivers/staging/lustre/lustre/llite/file.c index 7c7ef7ec908e..5ebee6ca0a10 100644 --- a/drivers/staging/lustre/lustre/llite/file.c +++ b/drivers/staging/lustre/lustre/llite/file.c @@ -2912,8 +2912,8 @@ static int __ll_inode_revalidate(struct dentry *dentry, __u64 ibits) oit.it_op = IT_LOOKUP; /* Call getattr by fid, so do not provide name at all. */ - op_data = ll_prep_md_op_data(NULL, dentry->d_inode, - dentry->d_inode, NULL, 0, 0, + op_data = ll_prep_md_op_data(NULL, inode, + inode, NULL, 0, 0, LUSTRE_OPC_ANY, NULL); if (IS_ERR(op_data)) return PTR_ERR(op_data); @@ -2931,7 +2931,7 @@ static int __ll_inode_revalidate(struct dentry *dentry, __u64 ibits) goto out; } - rc = ll_revalidate_it_finish(req, &oit, dentry); + rc = ll_revalidate_it_finish(req, &oit, inode); if (rc != 0) { ll_intent_release(&oit); goto out; @@ -2944,7 +2944,7 @@ static int __ll_inode_revalidate(struct dentry *dentry, __u64 ibits) if (!dentry->d_inode->i_nlink) d_lustre_invalidate(dentry, 0); - ll_lookup_finish_locks(&oit, dentry); + ll_lookup_finish_locks(&oit, inode); } else if (!ll_have_md_lock(dentry->d_inode, &ibits, LCK_MINMODE)) { struct ll_sb_info *sbi = ll_i2sbi(dentry->d_inode); u64 valid = OBD_MD_FLGETATTR; diff --git a/drivers/staging/lustre/lustre/llite/llite_internal.h b/drivers/staging/lustre/lustre/llite/llite_internal.h index d032c2b086cc..2af1d7286250 100644 --- a/drivers/staging/lustre/lustre/llite/llite_internal.h +++ b/drivers/staging/lustre/lustre/llite/llite_internal.h @@ -786,9 +786,9 @@ extern const struct dentry_operations ll_d_ops; void ll_intent_drop_lock(struct lookup_intent *); void ll_intent_release(struct lookup_intent *); void ll_invalidate_aliases(struct inode *); -void ll_lookup_finish_locks(struct lookup_intent *it, struct dentry *dentry); +void ll_lookup_finish_locks(struct lookup_intent *it, struct inode *inode); int ll_revalidate_it_finish(struct ptlrpc_request *request, - struct lookup_intent *it, struct dentry *de); + struct lookup_intent *it, struct inode *inode); /* llite/llite_lib.c */ extern struct super_operations lustre_super_operations; diff --git a/drivers/staging/lustre/lustre/llite/namei.c b/drivers/staging/lustre/lustre/llite/namei.c index 4f361b77c749..890ac190f5fa 100644 --- a/drivers/staging/lustre/lustre/llite/namei.c +++ b/drivers/staging/lustre/lustre/llite/namei.c @@ -481,6 +481,7 @@ static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry, struct lookup_intent lookup_it = { .it_op = IT_LOOKUP }; struct dentry *save = dentry, *retval; struct ptlrpc_request *req = NULL; + struct inode *inode; struct md_op_data *op_data; __u32 opc; int rc; @@ -539,12 +540,13 @@ static struct dentry *ll_lookup_it(struct inode *parent, struct dentry *dentry, goto out; } - if ((it->it_op & IT_OPEN) && dentry->d_inode && - !S_ISREG(dentry->d_inode->i_mode) && - !S_ISDIR(dentry->d_inode->i_mode)) { - ll_release_openhandle(dentry->d_inode, it); + inode = dentry->d_inode; + if ((it->it_op & IT_OPEN) && inode && + !S_ISREG(inode->i_mode) && + !S_ISDIR(inode->i_mode)) { + ll_release_openhandle(inode, it); } - ll_lookup_finish_locks(it, dentry); + ll_lookup_finish_locks(it, inode); if (dentry == save) retval = NULL; diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c index 9ee5343d4884..3662f1d1d9cf 100644 --- a/fs/9p/vfs_inode.c +++ b/fs/9p/vfs_inode.c @@ -1127,7 +1127,7 @@ static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr) } /* Write all dirty data */ - if (S_ISREG(dentry->d_inode->i_mode)) + if (d_is_reg(dentry)) filemap_write_and_wait(dentry->d_inode->i_mapping); retval = p9_client_wstat(fid, &wstat); @@ -1285,7 +1285,7 @@ SYSCALL_DEFINE2(io_setup, unsigned, nr_events, aio_context_t __user *, ctxp) ret = -EINVAL; if (unlikely(ctx || nr_events == 0)) { - pr_debug("EINVAL: io_setup: ctx %lu nr_events %u\n", + pr_debug("EINVAL: ctx %lu nr_events %u\n", ctx, nr_events); goto out; } @@ -1333,7 +1333,7 @@ SYSCALL_DEFINE1(io_destroy, aio_context_t, ctx) return ret; } - pr_debug("EINVAL: io_destroy: invalid context id\n"); + pr_debug("EINVAL: invalid context id\n"); return -EINVAL; } @@ -1515,7 +1515,7 @@ static int io_submit_one(struct kioctx *ctx, struct iocb __user *user_iocb, (iocb->aio_nbytes != (size_t)iocb->aio_nbytes) || ((ssize_t)iocb->aio_nbytes < 0) )) { - pr_debug("EINVAL: io_submit: overflow check\n"); + pr_debug("EINVAL: overflow check\n"); return -EINVAL; } diff --git a/fs/autofs4/dev-ioctl.c b/fs/autofs4/dev-ioctl.c index aaf96cb25452..ac7d921ed984 100644 --- a/fs/autofs4/dev-ioctl.c +++ b/fs/autofs4/dev-ioctl.c @@ -95,7 +95,7 @@ static int check_dev_ioctl_version(int cmd, struct autofs_dev_ioctl *param) */ static struct autofs_dev_ioctl *copy_dev_ioctl(struct autofs_dev_ioctl __user *in) { - struct autofs_dev_ioctl tmp; + struct autofs_dev_ioctl tmp, *res; if (copy_from_user(&tmp, in, sizeof(tmp))) return ERR_PTR(-EFAULT); @@ -106,7 +106,11 @@ static struct autofs_dev_ioctl *copy_dev_ioctl(struct autofs_dev_ioctl __user *i if (tmp.size > (PATH_MAX + sizeof(tmp))) return ERR_PTR(-ENAMETOOLONG); - return memdup_user(in, tmp.size); + res = memdup_user(in, tmp.size); + if (!IS_ERR(res)) + res->size = tmp.size; + + return res; } static inline void free_dev_ioctl(struct autofs_dev_ioctl *param) diff --git a/fs/autofs4/expire.c b/fs/autofs4/expire.c index bfdbaba9c2ba..11dd118f75e2 100644 --- a/fs/autofs4/expire.c +++ b/fs/autofs4/expire.c @@ -374,7 +374,7 @@ static struct dentry *should_expire(struct dentry *dentry, return NULL; } - if (dentry->d_inode && S_ISLNK(dentry->d_inode->i_mode)) { + if (dentry->d_inode && d_is_symlink(dentry)) { DPRINTK("checking symlink %p %pd", dentry, dentry); /* * A symlink can't be "busy" in the usual sense so diff --git a/fs/autofs4/root.c b/fs/autofs4/root.c index dbb5b7212ce1..7e44fdd03e2d 100644 --- a/fs/autofs4/root.c +++ b/fs/autofs4/root.c @@ -108,7 +108,7 @@ static int autofs4_dir_open(struct inode *inode, struct file *file) struct dentry *dentry = file->f_path.dentry; struct autofs_sb_info *sbi = autofs4_sbi(dentry->d_sb); - DPRINTK("file=%p dentry=%p %pD", file, dentry, dentry); + DPRINTK("file=%p dentry=%p %pd", file, dentry, dentry); if (autofs4_oz_mode(sbi)) goto out; @@ -371,7 +371,7 @@ static struct vfsmount *autofs4_d_automount(struct path *path) * having d_mountpoint() true, so there's no need to call back * to the daemon. */ - if (dentry->d_inode && S_ISLNK(dentry->d_inode->i_mode)) { + if (dentry->d_inode && d_is_symlink(dentry)) { spin_unlock(&sbi->fs_lock); goto done; } @@ -485,7 +485,7 @@ static int autofs4_d_manage(struct dentry *dentry, bool rcu_walk) * an incorrect ELOOP error return. */ if ((!d_mountpoint(dentry) && !simple_empty(dentry)) || - (dentry->d_inode && S_ISLNK(dentry->d_inode->i_mode))) + (dentry->d_inode && d_is_symlink(dentry))) status = -EISDIR; } spin_unlock(&sbi->fs_lock); diff --git a/fs/bad_inode.c b/fs/bad_inode.c index afd2b4408adf..861b1e1c4777 100644 --- a/fs/bad_inode.c +++ b/fs/bad_inode.c @@ -15,161 +15,14 @@ #include <linux/namei.h> #include <linux/poll.h> - -static loff_t bad_file_llseek(struct file *file, loff_t offset, int whence) -{ - return -EIO; -} - -static ssize_t bad_file_read(struct file *filp, char __user *buf, - size_t size, loff_t *ppos) -{ - return -EIO; -} - -static ssize_t bad_file_write(struct file *filp, const char __user *buf, - size_t siz, loff_t *ppos) -{ - return -EIO; -} - -static ssize_t bad_file_aio_read(struct kiocb *iocb, const struct iovec *iov, - unsigned long nr_segs, loff_t pos) -{ - return -EIO; -} - -static ssize_t bad_file_aio_write(struct kiocb *iocb, const struct iovec *iov, - unsigned long nr_segs, loff_t pos) -{ - return -EIO; -} - -static int bad_file_readdir(struct file *file, struct dir_context *ctx) -{ - return -EIO; -} - -static unsigned int bad_file_poll(struct file *filp, poll_table *wait) -{ - return POLLERR; -} - -static long bad_file_unlocked_ioctl(struct file *file, unsigned cmd, - unsigned long arg) -{ - return -EIO; -} - -static long bad_file_compat_ioctl(struct file *file, unsigned int cmd, - unsigned long arg) -{ - return -EIO; -} - -static int bad_file_mmap(struct file *file, struct vm_area_struct *vma) -{ - return -EIO; -} - static int bad_file_open(struct inode *inode, struct file *filp) { return -EIO; } -static int bad_file_flush(struct file *file, fl_owner_t id) -{ - return -EIO; -} - -static int bad_file_release(struct inode *inode, struct file *filp) -{ - return -EIO; -} - -static int bad_file_fsync(struct file *file, loff_t start, loff_t end, - int datasync) -{ - return -EIO; -} - -static int bad_file_aio_fsync(struct kiocb *iocb, int datasync) -{ - return -EIO; -} - -static int bad_file_fasync(int fd, struct file *filp, int on) -{ - return -EIO; -} - -static int bad_file_lock(struct file *file, int cmd, struct file_lock *fl) -{ - return -EIO; -} - -static ssize_t bad_file_sendpage(struct file *file, struct page *page, - int off, size_t len, loff_t *pos, int more) -{ - return -EIO; -} - -static unsigned long bad_file_get_unmapped_area(struct file *file, - unsigned long addr, unsigned long len, - unsigned long pgoff, unsigned long flags) -{ - return -EIO; -} |