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-rw-r--r--fs/btrfs/ctree.c2
-rw-r--r--fs/btrfs/ctree.h5
-rw-r--r--fs/btrfs/dir-item.c10
-rw-r--r--fs/btrfs/extent_io.c5
-rw-r--r--fs/btrfs/super.c9
-rw-r--r--fs/btrfs/xattr.c150
-rw-r--r--fs/dcache.c11
-rw-r--r--fs/inode.c4
-rw-r--r--fs/namespace.c8
-rw-r--r--fs/ocfs2/file.c8
-rw-r--r--fs/pipe.c55
-rw-r--r--fs/splice.c8
12 files changed, 167 insertions, 108 deletions
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 93de3ba994e7..f8ffee4562d3 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -2963,7 +2963,7 @@ done:
*/
if (!p->leave_spinning)
btrfs_set_path_blocking(p);
- if (ret < 0)
+ if (ret < 0 && !p->skip_release_on_error)
btrfs_release_path(p);
return ret;
}
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index d3511cc17091..3b39eb4cb309 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -608,6 +608,7 @@ struct btrfs_path {
unsigned int skip_locking:1;
unsigned int leave_spinning:1;
unsigned int search_commit_root:1;
+ unsigned int skip_release_on_error:1;
};
/*
@@ -3609,6 +3610,10 @@ struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
int verify_dir_item(struct btrfs_root *root,
struct extent_buffer *leaf,
struct btrfs_dir_item *dir_item);
+struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
+ struct btrfs_path *path,
+ const char *name,
+ int name_len);
/* orphan.c */
int btrfs_insert_orphan_item(struct btrfs_trans_handle *trans,
diff --git a/fs/btrfs/dir-item.c b/fs/btrfs/dir-item.c
index a0691df5dcea..9521a93b5303 100644
--- a/fs/btrfs/dir-item.c
+++ b/fs/btrfs/dir-item.c
@@ -21,10 +21,6 @@
#include "hash.h"
#include "transaction.h"
-static struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
- struct btrfs_path *path,
- const char *name, int name_len);
-
/*
* insert a name into a directory, doing overflow properly if there is a hash
* collision. data_size indicates how big the item inserted should be. On
@@ -383,9 +379,9 @@ struct btrfs_dir_item *btrfs_lookup_xattr(struct btrfs_trans_handle *trans,
* this walks through all the entries in a dir item and finds one
* for a specific name.
*/
-static struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
- struct btrfs_path *path,
- const char *name, int name_len)
+struct btrfs_dir_item *btrfs_match_dir_item_name(struct btrfs_root *root,
+ struct btrfs_path *path,
+ const char *name, int name_len)
{
struct btrfs_dir_item *dir_item;
unsigned long name_ptr;
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index fa9f90049099..8adfc65b37dd 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -4289,8 +4289,11 @@ int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
}
ret = fiemap_fill_next_extent(fieinfo, em_start, disko,
em_len, flags);
- if (ret)
+ if (ret) {
+ if (ret == 1)
+ ret = 0;
goto out_free;
+ }
}
out_free:
free_extent_map(em);
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index d04db817be5c..92cbfbf2599e 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -906,6 +906,15 @@ find_root:
if (IS_ERR(new_root))
return ERR_CAST(new_root);
+ if (!(sb->s_flags & MS_RDONLY)) {
+ int ret;
+ down_read(&fs_info->cleanup_work_sem);
+ ret = btrfs_orphan_cleanup(new_root);
+ up_read(&fs_info->cleanup_work_sem);
+ if (ret)
+ return ERR_PTR(ret);
+ }
+
dir_id = btrfs_root_dirid(&new_root->root_item);
setup_root:
location.objectid = dir_id;
diff --git a/fs/btrfs/xattr.c b/fs/btrfs/xattr.c
index 488e987c3374..618e86ceede7 100644
--- a/fs/btrfs/xattr.c
+++ b/fs/btrfs/xattr.c
@@ -29,6 +29,7 @@
#include "xattr.h"
#include "disk-io.h"
#include "props.h"
+#include "locking.h"
ssize_t __btrfs_getxattr(struct inode *inode, const char *name,
@@ -91,7 +92,7 @@ static int do_setxattr(struct btrfs_trans_handle *trans,
struct inode *inode, const char *name,
const void *value, size_t size, int flags)
{
- struct btrfs_dir_item *di;
+ struct btrfs_dir_item *di = NULL;
struct btrfs_root *root = BTRFS_I(inode)->root;
struct btrfs_path *path;
size_t name_len = strlen(name);
@@ -103,84 +104,119 @@ static int do_setxattr(struct btrfs_trans_handle *trans,
path = btrfs_alloc_path();
if (!path)
return -ENOMEM;
+ path->skip_release_on_error = 1;
+
+ if (!value) {
+ di = btrfs_lookup_xattr(trans, root, path, btrfs_ino(inode),
+ name, name_len, -1);
+ if (!di && (flags & XATTR_REPLACE))
+ ret = -ENODATA;
+ else if (di)
+ ret = btrfs_delete_one_dir_name(trans, root, path, di);
+ goto out;
+ }
+ /*
+ * For a replace we can't just do the insert blindly.
+ * Do a lookup first (read-only btrfs_search_slot), and return if xattr
+ * doesn't exist. If it exists, fall down below to the insert/replace
+ * path - we can't race with a concurrent xattr delete, because the VFS
+ * locks the inode's i_mutex before calling setxattr or removexattr.
+ */
if (flags & XATTR_REPLACE) {
- di = btrfs_lookup_xattr(trans, root, path, btrfs_ino(inode), name,
- name_len, -1);
- if (IS_ERR(di)) {
- ret = PTR_ERR(di);
- goto out;
- } else if (!di) {
+ ASSERT(mutex_is_locked(&inode->i_mutex));
+ di = btrfs_lookup_xattr(NULL, root, path, btrfs_ino(inode),
+ name, name_len, 0);
+ if (!di) {
ret = -ENODATA;
goto out;
}
- ret = btrfs_delete_one_dir_name(trans, root, path, di);
- if (ret)
- goto out;
btrfs_release_path(path);
+ di = NULL;
+ }
+ ret = btrfs_insert_xattr_item(trans, root, path, btrfs_ino(inode),
+ name, name_len, value, size);
+ if (ret == -EOVERFLOW) {
/*
- * remove the attribute
+ * We have an existing item in a leaf, split_leaf couldn't
+ * expand it. That item might have or not a dir_item that
+ * matches our target xattr, so lets check.
*/
- if (!value)
- goto out;
- } else {
- di = btrfs_lookup_xattr(NULL, root, path, btrfs_ino(inode),
- name, name_len, 0);
- if (IS_ERR(di)) {
- ret = PTR_ERR(di);
+ ret = 0;
+ btrfs_assert_tree_locked(path->nodes[0]);
+ di = btrfs_match_dir_item_name(root, path, name, name_len);
+ if (!di && !(flags & XATTR_REPLACE)) {
+ ret = -ENOSPC;
goto out;
}
- if (!di && !value)
- goto out;
- btrfs_release_path(path);
+ } else if (ret == -EEXIST) {
+ ret = 0;
+ di = btrfs_match_dir_item_name(root, path, name, name_len);
+ ASSERT(di); /* logic error */
+ } else if (ret) {
+ goto out;
}
-again:
- ret = btrfs_insert_xattr_item(trans, root, path, btrfs_ino(inode),
- name, name_len, value, size);
- /*
- * If we're setting an xattr to a new value but the new value is say
- * exactly BTRFS_MAX_XATTR_SIZE, we could end up with EOVERFLOW getting
- * back from split_leaf. This is because it thinks we'll be extending
- * the existing item size, but we're asking for enough space to add the
- * item itself. So if we get EOVERFLOW just set ret to EEXIST and let
- * the rest of the function figure it out.
- */
- if (ret == -EOVERFLOW)
+ if (di && (flags & XATTR_CREATE)) {
ret = -EEXIST;
+ goto out;
+ }
- if (ret == -EEXIST) {
- if (flags & XATTR_CREATE)
- goto out;
+ if (di) {
/*
- * We can't use the path we already have since we won't have the
- * proper locking for a delete, so release the path and
- * re-lookup to delete the thing.
+ * We're doing a replace, and it must be atomic, that is, at
+ * any point in time we have either the old or the new xattr
+ * value in the tree. We don't want readers (getxattr and
+ * listxattrs) to miss a value, this is specially important
+ * for ACLs.
*/
- btrfs_release_path(path);
- di = btrfs_lookup_xattr(trans, root, path, btrfs_ino(inode),
- name, name_len, -1);
- if (IS_ERR(di)) {
- ret = PTR_ERR(di);
- goto out;
- } else if (!di) {
- /* Shouldn't happen but just in case... */
- btrfs_release_path(path);
- goto again;
+ const int slot = path->slots[0];
+ struct extent_buffer *leaf = path->nodes[0];
+ const u16 old_data_len = btrfs_dir_data_len(leaf, di);
+ const u32 item_size = btrfs_item_size_nr(leaf, slot);
+ const u32 data_size = sizeof(*di) + name_len + size;
+ struct btrfs_item *item;
+ unsigned long data_ptr;
+ char *ptr;
+
+ if (size > old_data_len) {
+ if (btrfs_leaf_free_space(root, leaf) <
+ (size - old_data_len)) {
+ ret = -ENOSPC;
+ goto out;
+ }
}
- ret = btrfs_delete_one_dir_name(trans, root, path, di);
- if (ret)
- goto out;
+ if (old_data_len + name_len + sizeof(*di) == item_size) {
+ /* No other xattrs packed in the same leaf item. */
+ if (size > old_data_len)
+ btrfs_extend_item(root, path,
+ size - old_data_len);
+ else if (size < old_data_len)
+ btrfs_truncate_item(root, path, data_size, 1);
+ } else {
+ /* There are other xattrs packed in the same item. */
+ ret = btrfs_delete_one_dir_name(trans, root, path, di);
+ if (ret)
+ goto out;
+ btrfs_extend_item(root, path, data_size);
+ }
+ item = btrfs_item_nr(slot);
+ ptr = btrfs_item_ptr(leaf, slot, char);
+ ptr += btrfs_item_size(leaf, item) - data_size;
+ di = (struct btrfs_dir_item *)ptr;
+ btrfs_set_dir_data_len(leaf, di, size);
+ data_ptr = ((unsigned long)(di + 1)) + name_len;
+ write_extent_buffer(leaf, value, data_ptr, size);
+ btrfs_mark_buffer_dirty(leaf);
+ } else {
/*
- * We have a value to set, so go back and try to insert it now.
+ * Insert, and we had space for the xattr, so path->slots[0] is
+ * where our xattr dir_item is and btrfs_insert_xattr_item()
+ * filled it.
*/
- if (value) {
- btrfs_release_path(path);
- goto again;
- }
}
out:
btrfs_free_path(path);
diff --git a/fs/dcache.c b/fs/dcache.c
index d3c2fedada14..87cf545feeeb 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -2937,17 +2937,6 @@ restart:
vfsmnt = &mnt->mnt;
continue;
}
- /*
- * Filesystems needing to implement special "root names"
- * should do so with ->d_dname()
- */
- if (IS_ROOT(dentry) &&
- (dentry->d_name.len != 1 ||
- dentry->d_name.name[0] != '/')) {
- WARN(1, "Root dentry has weird name <%.*s>\n",
- (int) dentry->d_name.len,
- dentry->d_name.name);
- }
if (!error)
error = is_mounted(vfsmnt) ? 1 : 2;
break;
diff --git a/fs/inode.c b/fs/inode.c
index e846a32e8d6e..644875bcc846 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -1631,8 +1631,8 @@ int file_remove_suid(struct file *file)
error = security_inode_killpriv(dentry);
if (!error && killsuid)
error = __remove_suid(dentry, killsuid);
- if (!error && (inode->i_sb->s_flags & MS_NOSEC))
- inode->i_flags |= S_NOSEC;
+ if (!error)
+ inode_has_no_xattr(inode);
return error;
}
diff --git a/fs/namespace.c b/fs/namespace.c
index 1e06f2df10c8..6247d1aed5df 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -3058,11 +3058,15 @@ bool fs_fully_visible(struct file_system_type *type)
if (mnt->mnt.mnt_root != mnt->mnt.mnt_sb->s_root)
continue;
- /* This mount is not fully visible if there are any child mounts
- * that cover anything except for empty directories.
+ /* This mount is not fully visible if there are any
+ * locked child mounts that cover anything except for
+ * empty directories.
*/
list_for_each_entry(child, &mnt->mnt_mounts, mnt_child) {
struct inode *inode = child->mnt_mountpoint->d_inode;
+ /* Only worry about locked mounts */
+ if (!(mnt->mnt.mnt_flags & MNT_LOCKED))
+ continue;
if (!S_ISDIR(inode->i_mode))
goto next;
if (inode->i_nlink > 2)
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index 7fe30f655aa5..35f54bc96519 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -2478,9 +2478,7 @@ static ssize_t ocfs2_file_splice_write(struct pipe_inode_info *pipe,
struct address_space *mapping = out->f_mapping;
struct inode *inode = mapping->host;
struct splice_desc sd = {
- .total_len = len,
.flags = flags,
- .pos = *ppos,
.u.file = out,
};
@@ -2490,6 +2488,12 @@ static ssize_t ocfs2_file_splice_write(struct pipe_inode_info *pipe,
out->f_path.dentry->d_name.len,
out->f_path.dentry->d_name.name, len);
+ ret = generic_write_checks(out, ppos, &len, 0);
+ if (ret)
+ return ret;
+ sd.total_len = len;
+ sd.pos = *ppos;
+
pipe_lock(pipe);
splice_from_pipe_begin(&sd);
diff --git a/fs/pipe.c b/fs/pipe.c
index 78fd0d0788db..46f1ab264a4c 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -117,25 +117,27 @@ void pipe_wait(struct pipe_inode_info *pipe)
}
static int
-pipe_iov_copy_from_user(void *to, struct iovec *iov, unsigned long len,
- int atomic)
+pipe_iov_copy_from_user(void *addr, int *offset, struct iovec *iov,
+ size_t *remaining, int atomic)
{
unsigned long copy;
- while (len > 0) {
+ while (*remaining > 0) {
while (!iov->iov_len)
iov++;
- copy = min_t(unsigned long, len, iov->iov_len);
+ copy = min_t(unsigned long, *remaining, iov->iov_len);
if (atomic) {
- if (__copy_from_user_inatomic(to, iov->iov_base, copy))
+ if (__copy_from_user_inatomic(addr + *offset,
+ iov->iov_base, copy))
return -EFAULT;
} else {
- if (copy_from_user(to, iov->iov_base, copy))
+ if (copy_from_user(addr + *offset,
+ iov->iov_base, copy))
return -EFAULT;
}
- to += copy;
- len -= copy;
+ *offset += copy;
+ *remaining -= copy;
iov->iov_base += copy;
iov->iov_len -= copy;
}
@@ -143,25 +145,27 @@ pipe_iov_copy_from_user(void *to, struct iovec *iov, unsigned long len,
}
static int
-pipe_iov_copy_to_user(struct iovec *iov, const void *from, unsigned long len,
- int atomic)
+pipe_iov_copy_to_user(struct iovec *iov, void *addr, int *offset,
+ size_t *remaining, int atomic)
{
unsigned long copy;
- while (len > 0) {
+ while (*remaining > 0) {
while (!iov->iov_len)
iov++;
- copy = min_t(unsigned long, len, iov->iov_len);
+ copy = min_t(unsigned long, *remaining, iov->iov_len);
if (atomic) {
- if (__copy_to_user_inatomic(iov->iov_base, from, copy))
+ if (__copy_to_user_inatomic(iov->iov_base,
+ addr + *offset, copy))
return -EFAULT;
} else {
- if (copy_to_user(iov->iov_base, from, copy))
+ if (copy_to_user(iov->iov_base,
+ addr + *offset, copy))
return -EFAULT;
}
- from += copy;
- len -= copy;
+ *offset += copy;
+ *remaining -= copy;
iov->iov_base += copy;
iov->iov_len -= copy;
}
@@ -395,7 +399,7 @@ pipe_read(struct kiocb *iocb, const struct iovec *_iov,
struct pipe_buffer *buf = pipe->bufs + curbuf;
const struct pipe_buf_operations *ops = buf->ops;
void *addr;
- size_t chars = buf->len;
+ size_t chars = buf->len, remaining;
int error, atomic;
if (chars > total_len)
@@ -409,9 +413,11 @@ pipe_read(struct kiocb *iocb, const struct iovec *_iov,
}
atomic = !iov_fault_in_pages_write(iov, chars);
+ remaining = chars;
redo:
addr = ops->map(pipe, buf, atomic);
- error = pipe_iov_copy_to_user(iov, addr + buf->offset, chars, atomic);
+ error = pipe_iov_copy_to_user(iov, addr, &buf->offset,
+ &remaining, atomic);
ops->unmap(pipe, buf, addr);
if (unlikely(error)) {
/*
@@ -426,7 +432,6 @@ redo:
break;
}
ret += chars;
- buf->offset += chars;
buf->len -= chars;
/* Was it a packet buffer? Clean up and exit */
@@ -531,6 +536,7 @@ pipe_write(struct kiocb *iocb, const struct iovec *_iov,
if (ops->can_merge && offset + chars <= PAGE_SIZE) {
int error, atomic = 1;
void *addr;
+ size_t remaining = chars;
error = ops->confirm(pipe, buf);
if (error)
@@ -539,8 +545,8 @@ pipe_write(struct kiocb *iocb, const struct iovec *_iov,
iov_fault_in_pages_read(iov, chars);
redo1:
addr = ops->map(pipe, buf, atomic);
- error = pipe_iov_copy_from_user(offset + addr, iov,
- chars, atomic);
+ error = pipe_iov_copy_from_user(addr, &offset, iov,
+ &remaining, atomic);
ops->unmap(pipe, buf, addr);
ret = error;
do_wakeup = 1;
@@ -575,6 +581,8 @@ redo1:
struct page *page = pipe->tmp_page;
char *src;
int error, atomic = 1;
+ int offset = 0;
+ size_t remaining;
if (!page) {
page = alloc_page(GFP_HIGHUSER);
@@ -595,14 +603,15 @@ redo1:
chars = total_len;
iov_fault_in_pages_read(iov, chars);
+ remaining = chars;
redo2:
if (atomic)
src = kmap_atomic(page);
else
src = kmap(page);
- error = pipe_iov_copy_from_user(src, iov, chars,
- atomic);
+ error = pipe_iov_copy_from_user(src, &offset, iov,
+ &remaining, atomic);
if (atomic)
kunmap_atomic(src);
else
diff --git a/fs/splice.c b/fs/splice.c
index ffb92b9d34ba..622b6aa1b72f 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -1012,13 +1012,17 @@ generic_file_splice_write(struct pipe_inode_info *pipe, struct file *out,
struct address_space *mapping = out->f_mapping;
struct inode *inode = mapping->host;
struct splice_desc sd = {
- .total_len = len,
.flags = flags,
- .pos = *ppos,
.u.file = out,
};
ssize_t ret;
+ ret = generic_write_checks(out, ppos, &len, S_ISBLK(inode->i_mode));
+ if (ret)
+ return ret;
+ sd.total_len = len;
+ sd.pos = *ppos;
+
pipe_lock(pipe);
splice_from_pipe_begin(&sd);
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-20 20:51:29 +0000