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Diffstat (limited to 'fs/bcachefs/fs-ioctl.c')
-rw-r--r--fs/bcachefs/fs-ioctl.c205
1 files changed, 6 insertions, 199 deletions
diff --git a/fs/bcachefs/fs-ioctl.c b/fs/bcachefs/fs-ioctl.c
index 15725b4ce393..a82dfce9e4ad 100644
--- a/fs/bcachefs/fs-ioctl.c
+++ b/fs/bcachefs/fs-ioctl.c
@@ -5,8 +5,8 @@
#include "chardev.h"
#include "dirent.h"
#include "fs.h"
-#include "fs-common.h"
#include "fs-ioctl.h"
+#include "namei.h"
#include "quota.h"
#include <linux/compat.h>
@@ -21,180 +21,6 @@
#define FSOP_GOING_FLAGS_LOGFLUSH 0x1 /* flush log but not data */
#define FSOP_GOING_FLAGS_NOLOGFLUSH 0x2 /* don't flush log nor data */
-struct flags_set {
- unsigned mask;
- unsigned flags;
-
- unsigned projid;
-
- bool set_projinherit;
- bool projinherit;
-};
-
-static int bch2_inode_flags_set(struct btree_trans *trans,
- struct bch_inode_info *inode,
- struct bch_inode_unpacked *bi,
- void *p)
-{
- struct bch_fs *c = inode->v.i_sb->s_fs_info;
- /*
- * We're relying on btree locking here for exclusion with other ioctl
- * calls - use the flags in the btree (@bi), not inode->i_flags:
- */
- struct flags_set *s = p;
- unsigned newflags = s->flags;
- unsigned oldflags = bi->bi_flags & s->mask;
-
- if (((newflags ^ oldflags) & (BCH_INODE_append|BCH_INODE_immutable)) &&
- !capable(CAP_LINUX_IMMUTABLE))
- return -EPERM;
-
- if (!S_ISREG(bi->bi_mode) &&
- !S_ISDIR(bi->bi_mode) &&
- (newflags & (BCH_INODE_nodump|BCH_INODE_noatime)) != newflags)
- return -EINVAL;
-
- if (s->set_projinherit) {
- bi->bi_fields_set &= ~(1 << Inode_opt_project);
- bi->bi_fields_set |= ((int) s->projinherit << Inode_opt_project);
- }
-
- bi->bi_flags &= ~s->mask;
- bi->bi_flags |= newflags;
-
- bi->bi_ctime = timespec_to_bch2_time(c, current_time(&inode->v));
- return 0;
-}
-
-static int bch2_ioc_getflags(struct bch_inode_info *inode, int __user *arg)
-{
- unsigned flags = map_flags(bch_flags_to_uflags, inode->ei_inode.bi_flags);
-
- return put_user(flags, arg);
-}
-
-static int bch2_ioc_setflags(struct bch_fs *c,
- struct file *file,
- struct bch_inode_info *inode,
- void __user *arg)
-{
- struct flags_set s = { .mask = map_defined(bch_flags_to_uflags) };
- unsigned uflags;
- int ret;
-
- if (get_user(uflags, (int __user *) arg))
- return -EFAULT;
-
- s.flags = map_flags_rev(bch_flags_to_uflags, uflags);
- if (uflags)
- return -EOPNOTSUPP;
-
- ret = mnt_want_write_file(file);
- if (ret)
- return ret;
-
- inode_lock(&inode->v);
- if (!inode_owner_or_capable(file_mnt_idmap(file), &inode->v)) {
- ret = -EACCES;
- goto setflags_out;
- }
-
- mutex_lock(&inode->ei_update_lock);
- ret = bch2_subvol_is_ro(c, inode->ei_inum.subvol) ?:
- bch2_write_inode(c, inode, bch2_inode_flags_set, &s,
- ATTR_CTIME);
- mutex_unlock(&inode->ei_update_lock);
-
-setflags_out:
- inode_unlock(&inode->v);
- mnt_drop_write_file(file);
- return ret;
-}
-
-static int bch2_ioc_fsgetxattr(struct bch_inode_info *inode,
- struct fsxattr __user *arg)
-{
- struct fsxattr fa = { 0 };
-
- fa.fsx_xflags = map_flags(bch_flags_to_xflags, inode->ei_inode.bi_flags);
-
- if (inode->ei_inode.bi_fields_set & (1 << Inode_opt_project))
- fa.fsx_xflags |= FS_XFLAG_PROJINHERIT;
-
- fa.fsx_projid = inode->ei_qid.q[QTYP_PRJ];
-
- if (copy_to_user(arg, &fa, sizeof(fa)))
- return -EFAULT;
-
- return 0;
-}
-
-static int fssetxattr_inode_update_fn(struct btree_trans *trans,
- struct bch_inode_info *inode,
- struct bch_inode_unpacked *bi,
- void *p)
-{
- struct flags_set *s = p;
-
- if (s->projid != bi->bi_project) {
- bi->bi_fields_set |= 1U << Inode_opt_project;
- bi->bi_project = s->projid;
- }
-
- return bch2_inode_flags_set(trans, inode, bi, p);
-}
-
-static int bch2_ioc_fssetxattr(struct bch_fs *c,
- struct file *file,
- struct bch_inode_info *inode,
- struct fsxattr __user *arg)
-{
- struct flags_set s = { .mask = map_defined(bch_flags_to_xflags) };
- struct fsxattr fa;
- int ret;
-
- if (copy_from_user(&fa, arg, sizeof(fa)))
- return -EFAULT;
-
- s.set_projinherit = true;
- s.projinherit = (fa.fsx_xflags & FS_XFLAG_PROJINHERIT) != 0;
- fa.fsx_xflags &= ~FS_XFLAG_PROJINHERIT;
-
- s.flags = map_flags_rev(bch_flags_to_xflags, fa.fsx_xflags);
- if (fa.fsx_xflags)
- return -EOPNOTSUPP;
-
- if (fa.fsx_projid >= U32_MAX)
- return -EINVAL;
-
- /*
- * inode fields accessible via the xattr interface are stored with a +1
- * bias, so that 0 means unset:
- */
- s.projid = fa.fsx_projid + 1;
-
- ret = mnt_want_write_file(file);
- if (ret)
- return ret;
-
- inode_lock(&inode->v);
- if (!inode_owner_or_capable(file_mnt_idmap(file), &inode->v)) {
- ret = -EACCES;
- goto err;
- }
-
- mutex_lock(&inode->ei_update_lock);
- ret = bch2_subvol_is_ro(c, inode->ei_inum.subvol) ?:
- bch2_set_projid(c, inode, fa.fsx_projid) ?:
- bch2_write_inode(c, inode, fssetxattr_inode_update_fn, &s,
- ATTR_CTIME);
- mutex_unlock(&inode->ei_update_lock);
-err:
- inode_unlock(&inode->v);
- mnt_drop_write_file(file);
- return ret;
-}
-
static int bch2_reinherit_attrs_fn(struct btree_trans *trans,
struct bch_inode_info *inode,
struct bch_inode_unpacked *bi,
@@ -218,7 +44,7 @@ static int bch2_ioc_reinherit_attrs(struct bch_fs *c,
int ret = 0;
subvol_inum inum;
- kname = kmalloc(BCH_NAME_MAX + 1, GFP_KERNEL);
+ kname = kmalloc(BCH_NAME_MAX, GFP_KERNEL);
if (!kname)
return -ENOMEM;
@@ -511,14 +337,12 @@ static long bch2_ioctl_subvolume_destroy(struct bch_fs *c, struct file *filp,
ret = -EXDEV;
goto err;
}
- if (!d_is_positive(victim)) {
- ret = -ENOENT;
- goto err;
- }
- ret = __bch2_unlink(dir, victim, true);
+
+ ret = inode_permission(file_mnt_idmap(filp), d_inode(victim), MAY_WRITE) ?:
+ __bch2_unlink(dir, victim, true);
if (!ret) {
fsnotify_rmdir(dir, victim);
- d_delete(victim);
+ d_invalidate(victim);
}
err:
inode_unlock(dir);
@@ -534,23 +358,6 @@ long bch2_fs_file_ioctl(struct file *file, unsigned cmd, unsigned long arg)
long ret;
switch (cmd) {
- case FS_IOC_GETFLAGS:
- ret = bch2_ioc_getflags(inode, (int __user *) arg);
- break;
-
- case FS_IOC_SETFLAGS:
- ret = bch2_ioc_setflags(c, file, inode, (int __user *) arg);
- break;
-
- case FS_IOC_FSGETXATTR:
- ret = bch2_ioc_fsgetxattr(inode, (void __user *) arg);
- break;
-
- case FS_IOC_FSSETXATTR:
- ret = bch2_ioc_fssetxattr(c, file, inode,
- (void __user *) arg);
- break;
-
case BCHFS_IOC_REINHERIT_ATTRS:
ret = bch2_ioc_reinherit_attrs(c, file, inode,
(void __user *) arg);
generated by cgit v1.2.3 (git 2.46.0) at 2025-04-27 23:24:06 +0000