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Diffstat (limited to 'fs/bcachefs/fs-ioctl.c')
-rw-r--r--fs/bcachefs/fs-ioctl.c210
1 files changed, 106 insertions, 104 deletions
diff --git a/fs/bcachefs/fs-ioctl.c b/fs/bcachefs/fs-ioctl.c
index 2c1ecf7732cd..971744ba3bf9 100644
--- a/fs/bcachefs/fs-ioctl.c
+++ b/fs/bcachefs/fs-ioctl.c
@@ -1,7 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0
#ifndef NO_BCACHEFS_FS
#include "bcachefs.h"
#include "chardev.h"
+#include "dirent.h"
#include "fs.h"
#include "fs-ioctl.h"
#include "quota.h"
@@ -11,88 +13,18 @@
#define FS_IOC_GOINGDOWN _IOR('X', 125, __u32)
-/* Inode flags: */
-
-/* bcachefs inode flags -> vfs inode flags: */
-static const unsigned bch_flags_to_vfs[] = {
- [__BCH_INODE_SYNC] = S_SYNC,
- [__BCH_INODE_IMMUTABLE] = S_IMMUTABLE,
- [__BCH_INODE_APPEND] = S_APPEND,
- [__BCH_INODE_NOATIME] = S_NOATIME,
-};
-
-/* bcachefs inode flags -> FS_IOC_GETFLAGS: */
-static const unsigned bch_flags_to_uflags[] = {
- [__BCH_INODE_SYNC] = FS_SYNC_FL,
- [__BCH_INODE_IMMUTABLE] = FS_IMMUTABLE_FL,
- [__BCH_INODE_APPEND] = FS_APPEND_FL,
- [__BCH_INODE_NODUMP] = FS_NODUMP_FL,
- [__BCH_INODE_NOATIME] = FS_NOATIME_FL,
-};
-
-/* bcachefs inode flags -> FS_IOC_FSGETXATTR: */
-static const unsigned bch_flags_to_xflags[] = {
- [__BCH_INODE_SYNC] = FS_XFLAG_SYNC,
- [__BCH_INODE_IMMUTABLE] = FS_XFLAG_IMMUTABLE,
- [__BCH_INODE_APPEND] = FS_XFLAG_APPEND,
- [__BCH_INODE_NODUMP] = FS_XFLAG_NODUMP,
- [__BCH_INODE_NOATIME] = FS_XFLAG_NOATIME,
- //[__BCH_INODE_PROJINHERIT] = FS_XFLAG_PROJINHERIT;
-};
-
-#define set_flags(_map, _in, _out) \
-do { \
- unsigned _i; \
- \
- for (_i = 0; _i < ARRAY_SIZE(_map); _i++) \
- if ((_in) & (1 << _i)) \
- (_out) |= _map[_i]; \
- else \
- (_out) &= ~_map[_i]; \
-} while (0)
-
-#define map_flags(_map, _in) \
-({ \
- unsigned _out = 0; \
- \
- set_flags(_map, _in, _out); \
- _out; \
-})
-
-#define map_flags_rev(_map, _in) \
-({ \
- unsigned _i, _out = 0; \
- \
- for (_i = 0; _i < ARRAY_SIZE(_map); _i++) \
- if ((_in) & _map[_i]) { \
- (_out) |= 1 << _i; \
- (_in) &= ~_map[_i]; \
- } \
- (_out); \
-})
-
-#define map_defined(_map) \
-({ \
- unsigned _in = ~0; \
- \
- map_flags_rev(_map, _in); \
-})
-
-/* Set VFS inode flags from bcachefs inode: */
-void bch2_inode_flags_to_vfs(struct bch_inode_info *inode)
-{
- set_flags(bch_flags_to_vfs, inode->ei_inode.bi_flags, inode->v.i_flags);
-}
-
struct flags_set {
unsigned mask;
unsigned flags;
+
+ unsigned projid;
};
static int bch2_inode_flags_set(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:
@@ -105,14 +37,15 @@ static int bch2_inode_flags_set(struct bch_inode_info *inode,
!capable(CAP_LINUX_IMMUTABLE))
return -EPERM;
- if (!S_ISREG(inode->v.i_mode) &&
- !S_ISDIR(inode->v.i_mode) &&
+ if (!S_ISREG(bi->bi_mode) &&
+ !S_ISDIR(bi->bi_mode) &&
(newflags & (BCH_INODE_NODUMP|BCH_INODE_NOATIME)) != newflags)
return -EINVAL;
bi->bi_flags &= ~s->mask;
bi->bi_flags |= newflags;
- inode->v.i_ctime = current_time(&inode->v);
+
+ bi->bi_ctime = timespec_to_bch2_time(c, current_time(&inode->v));
return 0;
}
@@ -150,10 +83,8 @@ static int bch2_ioc_setflags(struct bch_fs *c,
}
mutex_lock(&inode->ei_update_lock);
- ret = __bch2_write_inode(c, inode, bch2_inode_flags_set, &s);
-
- if (!ret)
- bch2_inode_flags_to_vfs(inode);
+ ret = bch2_write_inode(c, inode, bch2_inode_flags_set, &s,
+ ATTR_CTIME);
mutex_unlock(&inode->ei_update_lock);
setflags_out:
@@ -173,26 +104,18 @@ static int bch2_ioc_fsgetxattr(struct bch_inode_info *inode,
return copy_to_user(arg, &fa, sizeof(fa));
}
-static int bch2_set_projid(struct bch_fs *c,
- struct bch_inode_info *inode,
- u32 projid)
+static int fssetxattr_inode_update_fn(struct bch_inode_info *inode,
+ struct bch_inode_unpacked *bi,
+ void *p)
{
- struct bch_qid qid = inode->ei_qid;
- int ret;
-
- if (projid == inode->ei_qid.q[QTYP_PRJ])
- return 0;
-
- qid.q[QTYP_PRJ] = projid;
+ struct flags_set *s = p;
- ret = bch2_quota_transfer(c, 1 << QTYP_PRJ, qid, inode->ei_qid,
- inode->v.i_blocks +
- inode->ei_quota_reserved);
- if (ret)
- return ret;
+ if (s->projid != bi->bi_project) {
+ bi->bi_fields_set |= 1U << Inode_opt_project;
+ bi->bi_project = s->projid;
+ }
- inode->ei_qid.q[QTYP_PRJ] = projid;
- return 0;
+ return bch2_inode_flags_set(inode, bi, p);
}
static int bch2_ioc_fssetxattr(struct bch_fs *c,
@@ -211,6 +134,11 @@ static int bch2_ioc_fssetxattr(struct bch_fs *c,
if (fa.fsx_xflags)
return -EOPNOTSUPP;
+ if (fa.fsx_projid >= U32_MAX)
+ return -EINVAL;
+
+ s.projid = fa.fsx_projid + 1;
+
ret = mnt_want_write_file(file);
if (ret)
return ret;
@@ -222,13 +150,12 @@ static int bch2_ioc_fssetxattr(struct bch_fs *c,
}
mutex_lock(&inode->ei_update_lock);
- ret = bch2_set_projid(c, inode, fa.fsx_projid);
+ ret = bch2_set_projid(c, inode, s.projid);
if (ret)
goto err_unlock;
- ret = __bch2_write_inode(c, inode, bch2_inode_flags_set, &s);
- if (!ret)
- bch2_inode_flags_to_vfs(inode);
+ ret = bch2_write_inode(c, inode, fssetxattr_inode_update_fn, &s,
+ ATTR_CTIME);
err_unlock:
mutex_unlock(&inode->ei_update_lock);
err:
@@ -237,6 +164,75 @@ err:
return ret;
}
+static int bch2_ioc_reinherit_attrs(struct bch_fs *c,
+ struct file *file,
+ struct bch_inode_info *src,
+ const char __user *name)
+{
+ struct bch_inode_info *dst;
+ struct inode *vinode = NULL;
+ char *kname = NULL;
+ struct qstr qstr;
+ int ret = 0;
+ u64 inum;
+
+ kname = kmalloc(BCH_NAME_MAX + 1, GFP_KERNEL);
+ if (!kname)
+ return -ENOMEM;
+
+ ret = strncpy_from_user(kname, name, BCH_NAME_MAX);
+ if (unlikely(ret < 0))
+ goto err1;
+
+ qstr.len = ret;
+ qstr.name = kname;
+
+ ret = -ENOENT;
+ inum = bch2_dirent_lookup(c, src->v.i_ino,
+ &src->ei_str_hash,
+ &qstr);
+ if (!inum)
+ goto err1;
+
+ vinode = bch2_vfs_inode_get(c, inum);
+ ret = PTR_ERR_OR_ZERO(vinode);
+ if (ret)
+ goto err1;
+
+ dst = to_bch_ei(vinode);
+
+ ret = mnt_want_write_file(file);
+ if (ret)
+ goto err2;
+
+ bch2_lock_inodes(src, dst);
+
+ if (inode_attr_changing(src, dst, Inode_opt_project)) {
+ ret = bch2_fs_quota_transfer(c, dst,
+ src->ei_qid,
+ 1 << QTYP_PRJ,
+ KEY_TYPE_QUOTA_PREALLOC);
+ if (ret)
+ goto err3;
+ }
+
+ ret = bch2_write_inode(c, dst, bch2_reinherit_attrs_fn, src, 0);
+err3:
+ bch2_unlock_inodes(src, dst);
+
+ /* return true if we did work */
+ if (ret >= 0)
+ ret = !ret;
+
+ mnt_drop_write_file(file);
+err2:
+ iput(vinode);
+err1:
+ kfree(kname);
+
+ return ret;
+}
+
long bch2_fs_file_ioctl(struct file *file, unsigned cmd, unsigned long arg)
{
struct bch_inode_info *inode = file_bch_inode(file);
@@ -253,7 +249,12 @@ long bch2_fs_file_ioctl(struct file *file, unsigned cmd, unsigned long arg)
case FS_IOC_FSGETXATTR:
return bch2_ioc_fsgetxattr(inode, (void __user *) arg);
case FS_IOC_FSSETXATTR:
- return bch2_ioc_fssetxattr(c, file, inode, (void __user *) arg);
+ return bch2_ioc_fssetxattr(c, file, inode,
+ (void __user *) arg);
+
+ case BCHFS_IOC_REINHERIT_ATTRS:
+ return bch2_ioc_reinherit_attrs(c, file, inode,
+ (void __user *) arg);
case FS_IOC_GETVERSION:
return -ENOTTY;
@@ -265,8 +266,9 @@ long bch2_fs_file_ioctl(struct file *file, unsigned cmd, unsigned long arg)
return -EPERM;
down_write(&sb->s_umount);
- sb->s_flags |= MS_RDONLY;
- bch2_fs_emergency_read_only(c);
+ sb->s_flags |= SB_RDONLY;
+ if (bch2_fs_emergency_read_only(c))
+ bch_err(c, "emergency read only due to ioctl");
up_write(&sb->s_umount);
return 0;
generated by cgit v1.2.3 (git 2.46.0) at 2025-07-01 14:42:41 +0000