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authorLinus Torvalds <torvalds@linux-foundation.org>2014-12-19 18:19:19 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2014-12-19 18:19:19 -0800
commitecb5ec044ab99be1f35e93962fa43e4bb3120d9e (patch)
tree8832ba0b39783bd8a836b5552eb8f74d2e450afe
parent298647e31af52e795867a399fa049cebd88067ff (diff)
parente3bb504efd919f7bacd24cb14038953899b909e1 (diff)
downloadlinux-linaro-stable-ecb5ec044ab99be1f35e93962fa43e4bb3120d9e.tar.gz
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull vfs pile #3 from Al Viro: "Assorted fixes and patches from the last cycle" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: [regression] chunk lost from bd9b51 vfs: make mounts and mountstats honor root dir like mountinfo does vfs: cleanup show_mountinfo init: fix read-write root mount unfuck binfmt_misc.c (broken by commit e6084d4) vm_area_operations: kill ->migrate() new helper: iter_is_iovec() move_extent_per_page(): get rid of unused w_flags lustre: get rid of playing with ->fs btrfs: filp_open() returns ERR_PTR() on failure, not NULL...
-rw-r--r--drivers/staging/lustre/lustre/include/linux/lustre_compat25.h24
-rw-r--r--drivers/staging/lustre/lustre/llite/dir.c2
-rw-r--r--drivers/staging/lustre/lustre/llite/llite_lib.c17
-rw-r--r--fs/binfmt_misc.c7
-rw-r--r--fs/btrfs/volumes.c2
-rw-r--r--fs/ext4/move_extent.c4
-rw-r--r--fs/kernfs/file.c22
-rw-r--r--fs/proc_namespace.c16
-rw-r--r--include/linux/migrate.h10
-rw-r--r--include/linux/mm.h2
-rw-r--r--include/linux/uio.h5
-rw-r--r--init/do_mounts.c6
-rw-r--r--mm/filemap.c2
-rw-r--r--mm/mempolicy.c5
-rw-r--r--mm/migrate.c21
-rw-r--r--mm/shmem.c2
-rw-r--r--net/socket.c1
17 files changed, 29 insertions, 119 deletions
diff --git a/drivers/staging/lustre/lustre/include/linux/lustre_compat25.h b/drivers/staging/lustre/lustre/include/linux/lustre_compat25.h
index 8156b4c0f568..3925db160650 100644
--- a/drivers/staging/lustre/lustre/include/linux/lustre_compat25.h
+++ b/drivers/staging/lustre/lustre/include/linux/lustre_compat25.h
@@ -42,28 +42,6 @@
#include "lustre_patchless_compat.h"
-# define LOCK_FS_STRUCT(fs) spin_lock(&(fs)->lock)
-# define UNLOCK_FS_STRUCT(fs) spin_unlock(&(fs)->lock)
-
-static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
- struct dentry *dentry)
-{
- struct path path;
- struct path old_pwd;
-
- path.mnt = mnt;
- path.dentry = dentry;
- LOCK_FS_STRUCT(fs);
- old_pwd = fs->pwd;
- path_get(&path);
- fs->pwd = path;
- UNLOCK_FS_STRUCT(fs);
-
- if (old_pwd.dentry)
- path_put(&old_pwd);
-}
-
-
/*
* set ATTR_BLOCKS to a high value to avoid any risk of collision with other
* ATTR_* attributes (see bug 13828)
@@ -110,8 +88,6 @@ static inline void ll_set_fs_pwd(struct fs_struct *fs, struct vfsmount *mnt,
#define cfs_bio_io_error(a, b) bio_io_error((a))
#define cfs_bio_endio(a, b, c) bio_endio((a), (c))
-#define cfs_fs_pwd(fs) ((fs)->pwd.dentry)
-#define cfs_fs_mnt(fs) ((fs)->pwd.mnt)
#define cfs_path_put(nd) path_put(&(nd)->path)
diff --git a/drivers/staging/lustre/lustre/llite/dir.c b/drivers/staging/lustre/lustre/llite/dir.c
index 407718a0026f..1ac7a702ce26 100644
--- a/drivers/staging/lustre/lustre/llite/dir.c
+++ b/drivers/staging/lustre/lustre/llite/dir.c
@@ -661,7 +661,7 @@ int ll_dir_setdirstripe(struct inode *dir, struct lmv_user_md *lump,
int mode;
int err;
- mode = (0755 & (S_IRWXUGO|S_ISVTX) & ~current->fs->umask) | S_IFDIR;
+ mode = (0755 & ~current_umask()) | S_IFDIR;
op_data = ll_prep_md_op_data(NULL, dir, NULL, filename,
strlen(filename), mode, LUSTRE_OPC_MKDIR,
lump);
diff --git a/drivers/staging/lustre/lustre/llite/llite_lib.c b/drivers/staging/lustre/lustre/llite/llite_lib.c
index 6e423aa6a6e4..a3367bfb1456 100644
--- a/drivers/staging/lustre/lustre/llite/llite_lib.c
+++ b/drivers/staging/lustre/lustre/llite/llite_lib.c
@@ -2372,21 +2372,6 @@ char *ll_get_fsname(struct super_block *sb, char *buf, int buflen)
return buf;
}
-static char *ll_d_path(struct dentry *dentry, char *buf, int bufsize)
-{
- char *path = NULL;
-
- struct path p;
-
- p.dentry = dentry;
- p.mnt = current->fs->root.mnt;
- path_get(&p);
- path = d_path(&p, buf, bufsize);
- path_put(&p);
-
- return path;
-}
-
void ll_dirty_page_discard_warn(struct page *page, int ioret)
{
char *buf, *path = NULL;
@@ -2398,7 +2383,7 @@ void ll_dirty_page_discard_warn(struct page *page, int ioret)
if (buf != NULL) {
dentry = d_find_alias(page->mapping->host);
if (dentry != NULL)
- path = ll_d_path(dentry, buf, PAGE_SIZE);
+ path = dentry_path_raw(dentry, buf, PAGE_SIZE);
}
CDEBUG(D_WARNING,
diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c
index c04ef1d4f18a..97aff2879cda 100644
--- a/fs/binfmt_misc.c
+++ b/fs/binfmt_misc.c
@@ -254,6 +254,7 @@ static char *scanarg(char *s, char del)
return NULL;
}
}
+ s[-1] ='\0';
return s;
}
@@ -378,8 +379,7 @@ static Node *create_entry(const char __user *buffer, size_t count)
p = scanarg(p, del);
if (!p)
goto einval;
- p[-1] = '\0';
- if (p == e->magic)
+ if (!e->magic[0])
goto einval;
if (USE_DEBUG)
print_hex_dump_bytes(
@@ -391,8 +391,7 @@ static Node *create_entry(const char __user *buffer, size_t count)
p = scanarg(p, del);
if (!p)
goto einval;
- p[-1] = '\0';
- if (p == e->mask) {
+ if (!e->mask[0]) {
e->mask = NULL;
pr_debug("register: mask[raw]: none\n");
} else if (USE_DEBUG)
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 0144790e296e..50c5a8762aed 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -1485,7 +1485,7 @@ static void update_dev_time(char *path_name)
struct file *filp;
filp = filp_open(path_name, O_RDWR, 0);
- if (!filp)
+ if (IS_ERR(filp))
return;
file_update_time(filp);
filp_close(filp, NULL);
diff --git a/fs/ext4/move_extent.c b/fs/ext4/move_extent.c
index 503ea15dc5db..370420bfae8d 100644
--- a/fs/ext4/move_extent.c
+++ b/fs/ext4/move_extent.c
@@ -267,7 +267,6 @@ move_extent_per_page(struct file *o_filp, struct inode *donor_inode,
handle_t *handle;
ext4_lblk_t orig_blk_offset, donor_blk_offset;
unsigned long blocksize = orig_inode->i_sb->s_blocksize;
- unsigned int w_flags = 0;
unsigned int tmp_data_size, data_size, replaced_size;
int err2, jblocks, retries = 0;
int replaced_count = 0;
@@ -288,9 +287,6 @@ again:
return 0;
}
- if (segment_eq(get_fs(), KERNEL_DS))
- w_flags |= AOP_FLAG_UNINTERRUPTIBLE;
-
orig_blk_offset = orig_page_offset * blocks_per_page +
data_offset_in_page;
diff --git a/fs/kernfs/file.c b/fs/kernfs/file.c
index 697390ea47b8..ddc9f9612f16 100644
--- a/fs/kernfs/file.c
+++ b/fs/kernfs/file.c
@@ -448,27 +448,6 @@ static struct mempolicy *kernfs_vma_get_policy(struct vm_area_struct *vma,
return pol;
}
-static int kernfs_vma_migrate(struct vm_area_struct *vma,
- const nodemask_t *from, const nodemask_t *to,
- unsigned long flags)
-{
- struct file *file = vma->vm_file;
- struct kernfs_open_file *of = kernfs_of(file);
- int ret;
-
- if (!of->vm_ops)
- return 0;
-
- if (!kernfs_get_active(of->kn))
- return 0;
-
- ret = 0;
- if (of->vm_ops->migrate)
- ret = of->vm_ops->migrate(vma, from, to, flags);
-
- kernfs_put_active(of->kn);
- return ret;
-}
#endif
static const struct vm_operations_struct kernfs_vm_ops = {
@@ -479,7 +458,6 @@ static const struct vm_operations_struct kernfs_vm_ops = {
#ifdef CONFIG_NUMA
.set_policy = kernfs_vma_set_policy,
.get_policy = kernfs_vma_get_policy,
- .migrate = kernfs_vma_migrate,
#endif
};
diff --git a/fs/proc_namespace.c b/fs/proc_namespace.c
index 73ca1740d839..0f96f71ab32b 100644
--- a/fs/proc_namespace.c
+++ b/fs/proc_namespace.c
@@ -91,6 +91,7 @@ static void show_type(struct seq_file *m, struct super_block *sb)
static int show_vfsmnt(struct seq_file *m, struct vfsmount *mnt)
{
+ struct proc_mounts *p = proc_mounts(m);
struct mount *r = real_mount(mnt);
int err = 0;
struct path mnt_path = { .dentry = mnt->mnt_root, .mnt = mnt };
@@ -104,7 +105,10 @@ static int show_vfsmnt(struct seq_file *m, struct vfsmount *mnt)
mangle(m, r->mnt_devname ? r->mnt_devname : "none");
}
seq_putc(m, ' ');
- seq_path(m, &mnt_path, " \t\n\\");
+ /* mountpoints outside of chroot jail will give SEQ_SKIP on this */
+ err = seq_path_root(m, &mnt_path, &p->root, " \t\n\\");
+ if (err)
+ goto out;
seq_putc(m, ' ');
show_type(m, sb);
seq_puts(m, __mnt_is_readonly(mnt) ? " ro" : " rw");
@@ -125,7 +129,6 @@ static int show_mountinfo(struct seq_file *m, struct vfsmount *mnt)
struct mount *r = real_mount(mnt);
struct super_block *sb = mnt->mnt_sb;
struct path mnt_path = { .dentry = mnt->mnt_root, .mnt = mnt };
- struct path root = p->root;
int err = 0;
seq_printf(m, "%i %i %u:%u ", r->mnt_id, r->mnt_parent->mnt_id,
@@ -139,7 +142,7 @@ static int show_mountinfo(struct seq_file *m, struct vfsmount *mnt)
seq_putc(m, ' ');
/* mountpoints outside of chroot jail will give SEQ_SKIP on this */
- err = seq_path_root(m, &mnt_path, &root, " \t\n\\");
+ err = seq_path_root(m, &mnt_path, &p->root, " \t\n\\");
if (err)
goto out;
@@ -182,6 +185,7 @@ out:
static int show_vfsstat(struct seq_file *m, struct vfsmount *mnt)
{
+ struct proc_mounts *p = proc_mounts(m);
struct mount *r = real_mount(mnt);
struct path mnt_path = { .dentry = mnt->mnt_root, .mnt = mnt };
struct super_block *sb = mnt_path.dentry->d_sb;
@@ -201,7 +205,10 @@ static int show_vfsstat(struct seq_file *m, struct vfsmount *mnt)
/* mount point */
seq_puts(m, " mounted on ");
- seq_path(m, &mnt_path, " \t\n\\");
+ /* mountpoints outside of chroot jail will give SEQ_SKIP on this */
+ err = seq_path_root(m, &mnt_path, &p->root, " \t\n\\");
+ if (err)
+ goto out;
seq_putc(m, ' ');
/* file system type */
@@ -216,6 +223,7 @@ static int show_vfsstat(struct seq_file *m, struct vfsmount *mnt)
}
seq_putc(m, '\n');
+out:
return err;
}
diff --git a/include/linux/migrate.h b/include/linux/migrate.h
index 01aad3ed89ec..fab9b32ace8e 100644
--- a/include/linux/migrate.h
+++ b/include/linux/migrate.h
@@ -36,9 +36,6 @@ extern int migrate_pages(struct list_head *l, new_page_t new, free_page_t free,
extern int migrate_prep(void);
extern int migrate_prep_local(void);
-extern int migrate_vmas(struct mm_struct *mm,
- const nodemask_t *from, const nodemask_t *to,
- unsigned long flags);
extern void migrate_page_copy(struct page *newpage, struct page *page);
extern int migrate_huge_page_move_mapping(struct address_space *mapping,
struct page *newpage, struct page *page);
@@ -57,13 +54,6 @@ static inline int migrate_pages(struct list_head *l, new_page_t new,
static inline int migrate_prep(void) { return -ENOSYS; }
static inline int migrate_prep_local(void) { return -ENOSYS; }
-static inline int migrate_vmas(struct mm_struct *mm,
- const nodemask_t *from, const nodemask_t *to,
- unsigned long flags)
-{
- return -ENOSYS;
-}
-
static inline void migrate_page_copy(struct page *newpage,
struct page *page) {}
diff --git a/include/linux/mm.h b/include/linux/mm.h
index c0a67b894c4c..f80d0194c9bc 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -286,8 +286,6 @@ struct vm_operations_struct {
*/
struct mempolicy *(*get_policy)(struct vm_area_struct *vma,
unsigned long addr);
- int (*migrate)(struct vm_area_struct *vma, const nodemask_t *from,
- const nodemask_t *to, unsigned long flags);
#endif
/* called by sys_remap_file_pages() to populate non-linear mapping */
int (*remap_pages)(struct vm_area_struct *vma, unsigned long addr,
diff --git a/include/linux/uio.h b/include/linux/uio.h
index a41e252396c0..1c5e453f7ea9 100644
--- a/include/linux/uio.h
+++ b/include/linux/uio.h
@@ -101,6 +101,11 @@ static inline size_t iov_iter_count(struct iov_iter *i)
return i->count;
}
+static inline bool iter_is_iovec(struct iov_iter *i)
+{
+ return !(i->type & (ITER_BVEC | ITER_KVEC));
+}
+
/*
* Cap the iov_iter by given limit; note that the second argument is
* *not* the new size - it's upper limit for such. Passing it a value
diff --git a/init/do_mounts.c b/init/do_mounts.c
index 9b3565c41502..eb410083e8e0 100644
--- a/init/do_mounts.c
+++ b/init/do_mounts.c
@@ -395,8 +395,6 @@ retry:
case 0:
goto out;
case -EACCES:
- flags |= MS_RDONLY;
- goto retry;
case -EINVAL:
continue;
}
@@ -419,6 +417,10 @@ retry:
#endif
panic("VFS: Unable to mount root fs on %s", b);
}
+ if (!(flags & MS_RDONLY)) {
+ flags |= MS_RDONLY;
+ goto retry;
+ }
printk("List of all partitions:\n");
printk_all_partitions();
diff --git a/mm/filemap.c b/mm/filemap.c
index e8905bc3cbd7..bd8543c6508f 100644
--- a/mm/filemap.c
+++ b/mm/filemap.c
@@ -2464,7 +2464,7 @@ ssize_t generic_perform_write(struct file *file,
/*
* Copies from kernel address space cannot fail (NFSD is a big user).
*/
- if (segment_eq(get_fs(), KERNEL_DS))
+ if (!iter_is_iovec(i))
flags |= AOP_FLAG_UNINTERRUPTIBLE;
do {
diff --git a/mm/mempolicy.c b/mm/mempolicy.c
index f22c55947181..0e0961b8c39c 100644
--- a/mm/mempolicy.c
+++ b/mm/mempolicy.c
@@ -1041,10 +1041,6 @@ int do_migrate_pages(struct mm_struct *mm, const nodemask_t *from,
down_read(&mm->mmap_sem);
- err = migrate_vmas(mm, from, to, flags);
- if (err)
- goto out;
-
/*
* Find a 'source' bit set in 'tmp' whose corresponding 'dest'
* bit in 'to' is not also set in 'tmp'. Clear the found 'source'
@@ -1124,7 +1120,6 @@ int do_migrate_pages(struct mm_struct *mm, const nodemask_t *from,
if (err < 0)
break;
}
-out:
up_read(&mm->mmap_sem);
if (err < 0)
return err;
diff --git a/mm/migrate.c b/mm/migrate.c
index b1d02127e1be..344cdf692fc8 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -1536,27 +1536,6 @@ out:
return err;
}
-/*
- * Call migration functions in the vma_ops that may prepare
- * memory in a vm for migration. migration functions may perform
- * the migration for vmas that do not have an underlying page struct.
- */
-int migrate_vmas(struct mm_struct *mm, const nodemask_t *to,
- const nodemask_t *from, unsigned long flags)
-{
- struct vm_area_struct *vma;
- int err = 0;
-
- for (vma = mm->mmap; vma && !err; vma = vma->vm_next) {
- if (vma->vm_ops && vma->vm_ops->migrate) {
- err = vma->vm_ops->migrate(vma, to, from, flags);
- if (err)
- break;
- }
- }
- return err;
-}
-
#ifdef CONFIG_NUMA_BALANCING
/*
* Returns true if this is a safe migration target node for misplaced NUMA
diff --git a/mm/shmem.c b/mm/shmem.c
index 185836ba53ef..73ba1df7c8ba 100644
--- a/mm/shmem.c
+++ b/mm/shmem.c
@@ -1536,7 +1536,7 @@ static ssize_t shmem_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
* holes of a sparse file, we actually need to allocate those pages,
* and even mark them dirty, so it cannot exceed the max_blocks limit.
*/
- if (segment_eq(get_fs(), KERNEL_DS))
+ if (!iter_is_iovec(to))
sgp = SGP_DIRTY;
index = *ppos >> PAGE_CACHE_SHIFT;
diff --git a/net/socket.c b/net/socket.c
index 70bbde65e4ca..a2c33a4dc7ba 100644
--- a/net/socket.c
+++ b/net/socket.c
@@ -372,7 +372,6 @@ struct file *sock_alloc_file(struct socket *sock, int flags, const char *dname)
path.mnt = mntget(sock_mnt);
d_instantiate(path.dentry, SOCK_INODE(sock));
- SOCK_INODE(sock)->i_fop = &socket_file_ops;
file = alloc_file(&path, FMODE_READ | FMODE_WRITE,
&socket_file_ops);