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authorLinus Torvalds <torvalds@linux-foundation.org>2018-08-13 19:58:36 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2018-08-13 19:58:36 -0700
commita66b4cd1e7163adb327838a3c81faaf6a9330d5a (patch)
tree2b123a010bb0f1566ff6f34e529f01ddf10ee308 /fs/hugetlbfs
parentb16528466786a540cb00148acb124e0149d62710 (diff)
parent5f336e722cc961be94d264d96b90c92888fffae1 (diff)
Merge branch 'work.open3' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs open-related updates from Al Viro: - "do we need fput() or put_filp()" rules are gone - it's always fput() now. We keep track of that state where it belongs - in ->f_mode. - int *opened mess killed - in finish_open(), in ->atomic_open() instances and in fs/namei.c code around do_last()/lookup_open()/atomic_open(). - alloc_file() wrappers with saner calling conventions are introduced (alloc_file_clone() and alloc_file_pseudo()); callers converted, with much simplification. - while we are at it, saner calling conventions for path_init() and link_path_walk(), simplifying things inside fs/namei.c (both on open-related paths and elsewhere). * 'work.open3' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: (40 commits) few more cleanups of link_path_walk() callers allow link_path_walk() to take ERR_PTR() make path_init() unconditionally paired with terminate_walk() document alloc_file() changes make alloc_file() static do_shmat(): grab shp->shm_file earlier, switch to alloc_file_clone() new helper: alloc_file_clone() create_pipe_files(): switch the first allocation to alloc_file_pseudo() anon_inode_getfile(): switch to alloc_file_pseudo() hugetlb_file_setup(): switch to alloc_file_pseudo() ocxlflash_getfile(): switch to alloc_file_pseudo() cxl_getfile(): switch to alloc_file_pseudo() ... and switch shmem_file_setup() to alloc_file_pseudo() __shmem_file_setup(): reorder allocations new wrapper: alloc_file_pseudo() kill FILE_{CREATED,OPENED} switch atomic_open() and lookup_open() to returning 0 in all success cases document ->atomic_open() changes ->atomic_open(): return 0 in all success cases get rid of 'opened' in path_openat() and the helpers downstream ...
Diffstat (limited to 'fs/hugetlbfs')
-rw-r--r--fs/hugetlbfs/inode.c54
1 files changed, 16 insertions, 38 deletions
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 40d4c66c7751..346a146c7617 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -1310,10 +1310,6 @@ static int get_hstate_idx(int page_size_log)
return h - hstates;
}
-static const struct dentry_operations anon_ops = {
- .d_dname = simple_dname
-};
-
/*
* Note that size should be aligned to proper hugepage size in caller side,
* otherwise hugetlb_reserve_pages reserves one less hugepages than intended.
@@ -1322,19 +1318,18 @@ struct file *hugetlb_file_setup(const char *name, size_t size,
vm_flags_t acctflag, struct user_struct **user,
int creat_flags, int page_size_log)
{
- struct file *file = ERR_PTR(-ENOMEM);
struct inode *inode;
- struct path path;
- struct super_block *sb;
- struct qstr quick_string;
+ struct vfsmount *mnt;
int hstate_idx;
+ struct file *file;
hstate_idx = get_hstate_idx(page_size_log);
if (hstate_idx < 0)
return ERR_PTR(-ENODEV);
*user = NULL;
- if (!hugetlbfs_vfsmount[hstate_idx])
+ mnt = hugetlbfs_vfsmount[hstate_idx];
+ if (!mnt)
return ERR_PTR(-ENOENT);
if (creat_flags == HUGETLB_SHMFS_INODE && !can_do_hugetlb_shm()) {
@@ -1350,45 +1345,28 @@ struct file *hugetlb_file_setup(const char *name, size_t size,
}
}
- sb = hugetlbfs_vfsmount[hstate_idx]->mnt_sb;
- quick_string.name = name;
- quick_string.len = strlen(quick_string.name);
- quick_string.hash = 0;
- path.dentry = d_alloc_pseudo(sb, &quick_string);
- if (!path.dentry)
- goto out_shm_unlock;
-
- d_set_d_op(path.dentry, &anon_ops);
- path.mnt = mntget(hugetlbfs_vfsmount[hstate_idx]);
file = ERR_PTR(-ENOSPC);
- inode = hugetlbfs_get_inode(sb, NULL, S_IFREG | S_IRWXUGO, 0);
+ inode = hugetlbfs_get_inode(mnt->mnt_sb, NULL, S_IFREG | S_IRWXUGO, 0);
if (!inode)
- goto out_dentry;
+ goto out;
if (creat_flags == HUGETLB_SHMFS_INODE)
inode->i_flags |= S_PRIVATE;
- file = ERR_PTR(-ENOMEM);
- if (hugetlb_reserve_pages(inode, 0,
- size >> huge_page_shift(hstate_inode(inode)), NULL,
- acctflag))
- goto out_inode;
-
- d_instantiate(path.dentry, inode);
inode->i_size = size;
clear_nlink(inode);
- file = alloc_file(&path, FMODE_WRITE | FMODE_READ,
- &hugetlbfs_file_operations);
- if (IS_ERR(file))
- goto out_dentry; /* inode is already attached */
-
- return file;
+ if (hugetlb_reserve_pages(inode, 0,
+ size >> huge_page_shift(hstate_inode(inode)), NULL,
+ acctflag))
+ file = ERR_PTR(-ENOMEM);
+ else
+ file = alloc_file_pseudo(inode, mnt, name, O_RDWR,
+ &hugetlbfs_file_operations);
+ if (!IS_ERR(file))
+ return file;
-out_inode:
iput(inode);
-out_dentry:
- path_put(&path);
-out_shm_unlock:
+out:
if (*user) {
user_shm_unlock(size, *user);
*user = NULL;

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