[PATCH v3 07/18] f2fs: convert to fileattr
From: Miklos Szeredi
Date: Thu Mar 25 2021 - 15:39:15 EST
Use the fileattr API to let the VFS handle locking, permission checking and
conversion.
Signed-off-by: Miklos Szeredi <mszeredi@xxxxxxxxxx>
Cc: Jaegeuk Kim <jaegeuk@xxxxxxxxxx>
---
fs/f2fs/f2fs.h | 3 +
fs/f2fs/file.c | 216 +++++++++---------------------------------------
fs/f2fs/namei.c | 2 +
3 files changed, 43 insertions(+), 178 deletions(-)
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index e2d302ae3a46..11a20dc505aa 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -3194,6 +3194,9 @@ int f2fs_setattr(struct user_namespace *mnt_userns, struct dentry *dentry,
int f2fs_truncate_hole(struct inode *inode, pgoff_t pg_start, pgoff_t pg_end);
void f2fs_truncate_data_blocks_range(struct dnode_of_data *dn, int count);
int f2fs_precache_extents(struct inode *inode);
+int f2fs_fileattr_get(struct dentry *dentry, struct fileattr *fa);
+int f2fs_fileattr_set(struct user_namespace *mnt_userns,
+ struct dentry *dentry, struct fileattr *fa);
long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg);
long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
int f2fs_transfer_project_quota(struct inode *inode, kprojid_t kprojid);
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index d26ff2ae3f5e..b4e6f64d99f4 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -22,6 +22,7 @@
#include <linux/file.h>
#include <linux/nls.h>
#include <linux/sched/signal.h>
+#include <linux/fileattr.h>
#include "f2fs.h"
#include "node.h"
@@ -990,6 +991,8 @@ const struct inode_operations f2fs_file_inode_operations = {
.set_acl = f2fs_set_acl,
.listxattr = f2fs_listxattr,
.fiemap = f2fs_fiemap,
+ .fileattr_get = f2fs_fileattr_get,
+ .fileattr_set = f2fs_fileattr_set,
};
static int fill_zero(struct inode *inode, pgoff_t index,
@@ -1871,13 +1874,16 @@ static int f2fs_setflags_common(struct inode *inode, u32 iflags, u32 mask)
return 0;
}
-/* FS_IOC_GETFLAGS and FS_IOC_SETFLAGS support */
+/* FS_IOC_[GS]ETFLAGS and FS_IOC_FS[GS]ETXATTR support */
/*
* To make a new on-disk f2fs i_flag gettable via FS_IOC_GETFLAGS, add an entry
* for it to f2fs_fsflags_map[], and add its FS_*_FL equivalent to
* F2FS_GETTABLE_FS_FL. To also make it settable via FS_IOC_SETFLAGS, also add
* its FS_*_FL equivalent to F2FS_SETTABLE_FS_FL.
+ *
+ * Translating flags to fsx_flags value used by FS_IOC_FSGETXATTR and
+ * FS_IOC_FSSETXATTR is done by the VFS.
*/
static const struct {
@@ -1952,67 +1958,6 @@ static inline u32 f2fs_fsflags_to_iflags(u32 fsflags)
return iflags;
}
-static int f2fs_ioc_getflags(struct file *filp, unsigned long arg)
-{
- struct inode *inode = file_inode(filp);
- struct f2fs_inode_info *fi = F2FS_I(inode);
- u32 fsflags = f2fs_iflags_to_fsflags(fi->i_flags);
-
- if (IS_ENCRYPTED(inode))
- fsflags |= FS_ENCRYPT_FL;
- if (IS_VERITY(inode))
- fsflags |= FS_VERITY_FL;
- if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode))
- fsflags |= FS_INLINE_DATA_FL;
- if (is_inode_flag_set(inode, FI_PIN_FILE))
- fsflags |= FS_NOCOW_FL;
-
- fsflags &= F2FS_GETTABLE_FS_FL;
-
- return put_user(fsflags, (int __user *)arg);
-}
-
-static int f2fs_ioc_setflags(struct file *filp, unsigned long arg)
-{
- struct inode *inode = file_inode(filp);
- struct f2fs_inode_info *fi = F2FS_I(inode);
- u32 fsflags, old_fsflags;
- u32 iflags;
- int ret;
-
- if (!inode_owner_or_capable(&init_user_ns, inode))
- return -EACCES;
-
- if (get_user(fsflags, (int __user *)arg))
- return -EFAULT;
-
- if (fsflags & ~F2FS_GETTABLE_FS_FL)
- return -EOPNOTSUPP;
- fsflags &= F2FS_SETTABLE_FS_FL;
-
- iflags = f2fs_fsflags_to_iflags(fsflags);
- if (f2fs_mask_flags(inode->i_mode, iflags) != iflags)
- return -EOPNOTSUPP;
-
- ret = mnt_want_write_file(filp);
- if (ret)
- return ret;
-
- inode_lock(inode);
-
- old_fsflags = f2fs_iflags_to_fsflags(fi->i_flags);
- ret = vfs_ioc_setflags_prepare(inode, old_fsflags, fsflags);
- if (ret)
- goto out;
-
- ret = f2fs_setflags_common(inode, iflags,
- f2fs_fsflags_to_iflags(F2FS_SETTABLE_FS_FL));
-out:
- inode_unlock(inode);
- mnt_drop_write_file(filp);
- return ret;
-}
-
static int f2fs_ioc_getversion(struct file *filp, unsigned long arg)
{
struct inode *inode = file_inode(filp);
@@ -3019,9 +2964,8 @@ int f2fs_transfer_project_quota(struct inode *inode, kprojid_t kprojid)
return err;
}
-static int f2fs_ioc_setproject(struct file *filp, __u32 projid)
+static int f2fs_ioc_setproject(struct inode *inode, __u32 projid)
{
- struct inode *inode = file_inode(filp);
struct f2fs_inode_info *fi = F2FS_I(inode);
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
struct page *ipage;
@@ -3082,7 +3026,7 @@ int f2fs_transfer_project_quota(struct inode *inode, kprojid_t kprojid)
return 0;
}
-static int f2fs_ioc_setproject(struct file *filp, __u32 projid)
+static int f2fs_ioc_setproject(struct inode *inode, __u32 projid)
{
if (projid != F2FS_DEF_PROJID)
return -EOPNOTSUPP;
@@ -3090,123 +3034,55 @@ static int f2fs_ioc_setproject(struct file *filp, __u32 projid)
}
#endif
-/* FS_IOC_FSGETXATTR and FS_IOC_FSSETXATTR support */
-
-/*
- * To make a new on-disk f2fs i_flag gettable via FS_IOC_FSGETXATTR and settable
- * via FS_IOC_FSSETXATTR, add an entry for it to f2fs_xflags_map[], and add its
- * FS_XFLAG_* equivalent to F2FS_SUPPORTED_XFLAGS.
- */
-
-static const struct {
- u32 iflag;
- u32 xflag;
-} f2fs_xflags_map[] = {
- { F2FS_SYNC_FL, FS_XFLAG_SYNC },
- { F2FS_IMMUTABLE_FL, FS_XFLAG_IMMUTABLE },
- { F2FS_APPEND_FL, FS_XFLAG_APPEND },
- { F2FS_NODUMP_FL, FS_XFLAG_NODUMP },
- { F2FS_NOATIME_FL, FS_XFLAG_NOATIME },
- { F2FS_PROJINHERIT_FL, FS_XFLAG_PROJINHERIT },
-};
-
-#define F2FS_SUPPORTED_XFLAGS ( \
- FS_XFLAG_SYNC | \
- FS_XFLAG_IMMUTABLE | \
- FS_XFLAG_APPEND | \
- FS_XFLAG_NODUMP | \
- FS_XFLAG_NOATIME | \
- FS_XFLAG_PROJINHERIT)
-
-/* Convert f2fs on-disk i_flags to FS_IOC_FS{GET,SET}XATTR flags */
-static inline u32 f2fs_iflags_to_xflags(u32 iflags)
-{
- u32 xflags = 0;
- int i;
-
- for (i = 0; i < ARRAY_SIZE(f2fs_xflags_map); i++)
- if (iflags & f2fs_xflags_map[i].iflag)
- xflags |= f2fs_xflags_map[i].xflag;
-
- return xflags;
-}
-
-/* Convert FS_IOC_FS{GET,SET}XATTR flags to f2fs on-disk i_flags */
-static inline u32 f2fs_xflags_to_iflags(u32 xflags)
-{
- u32 iflags = 0;
- int i;
-
- for (i = 0; i < ARRAY_SIZE(f2fs_xflags_map); i++)
- if (xflags & f2fs_xflags_map[i].xflag)
- iflags |= f2fs_xflags_map[i].iflag;
-
- return iflags;
-}
-
-static void f2fs_fill_fsxattr(struct inode *inode, struct fsxattr *fa)
+int f2fs_fileattr_get(struct dentry *dentry, struct fileattr *fa)
{
+ struct inode *inode = d_inode(dentry);
struct f2fs_inode_info *fi = F2FS_I(inode);
+ u32 fsflags = f2fs_iflags_to_fsflags(fi->i_flags);
- simple_fill_fsxattr(fa, f2fs_iflags_to_xflags(fi->i_flags));
+ if (IS_ENCRYPTED(inode))
+ fsflags |= FS_ENCRYPT_FL;
+ if (IS_VERITY(inode))
+ fsflags |= FS_VERITY_FL;
+ if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode))
+ fsflags |= FS_INLINE_DATA_FL;
+ if (is_inode_flag_set(inode, FI_PIN_FILE))
+ fsflags |= FS_NOCOW_FL;
+
+ fileattr_fill_flags(fa, fsflags & F2FS_GETTABLE_FS_FL);
if (f2fs_sb_has_project_quota(F2FS_I_SB(inode)))
fa->fsx_projid = from_kprojid(&init_user_ns, fi->i_projid);
-}
-static int f2fs_ioc_fsgetxattr(struct file *filp, unsigned long arg)
-{
- struct inode *inode = file_inode(filp);
- struct fsxattr fa;
-
- f2fs_fill_fsxattr(inode, &fa);
-
- if (copy_to_user((struct fsxattr __user *)arg, &fa, sizeof(fa)))
- return -EFAULT;
return 0;
}
-static int f2fs_ioc_fssetxattr(struct file *filp, unsigned long arg)
+int f2fs_fileattr_set(struct user_namespace *mnt_userns,
+ struct dentry *dentry, struct fileattr *fa)
{
- struct inode *inode = file_inode(filp);
- struct fsxattr fa, old_fa;
+ struct inode *inode = d_inode(dentry);
+ u32 fsflags = fa->flags, mask = F2FS_SETTABLE_FS_FL;
u32 iflags;
int err;
- if (copy_from_user(&fa, (struct fsxattr __user *)arg, sizeof(fa)))
- return -EFAULT;
-
- /* Make sure caller has proper permission */
- if (!inode_owner_or_capable(&init_user_ns, inode))
- return -EACCES;
-
- if (fa.fsx_xflags & ~F2FS_SUPPORTED_XFLAGS)
+ if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
+ return -EIO;
+ if (!f2fs_is_checkpoint_ready(F2FS_I_SB(inode)))
+ return -ENOSPC;
+ if (fsflags & ~F2FS_GETTABLE_FS_FL)
return -EOPNOTSUPP;
+ fsflags &= F2FS_SETTABLE_FS_FL;
+ if (!fa->flags_valid)
+ mask &= FS_COMMON_FL;
- iflags = f2fs_xflags_to_iflags(fa.fsx_xflags);
+ iflags = f2fs_fsflags_to_iflags(fsflags);
if (f2fs_mask_flags(inode->i_mode, iflags) != iflags)
return -EOPNOTSUPP;
- err = mnt_want_write_file(filp);
- if (err)
- return err;
-
- inode_lock(inode);
-
- f2fs_fill_fsxattr(inode, &old_fa);
- err = vfs_ioc_fssetxattr_check(inode, &old_fa, &fa);
- if (err)
- goto out;
-
- err = f2fs_setflags_common(inode, iflags,
- f2fs_xflags_to_iflags(F2FS_SUPPORTED_XFLAGS));
- if (err)
- goto out;
+ err = f2fs_setflags_common(inode, iflags, f2fs_fsflags_to_iflags(mask));
+ if (!err)
+ err = f2fs_ioc_setproject(inode, fa->fsx_projid);
- err = f2fs_ioc_setproject(filp, fa.fsx_projid);
-out:
- inode_unlock(inode);
- mnt_drop_write_file(filp);
return err;
}
@@ -4233,10 +4109,6 @@ static int f2fs_ioc_compress_file(struct file *filp, unsigned long arg)
static long __f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
{
switch (cmd) {
- case FS_IOC_GETFLAGS:
- return f2fs_ioc_getflags(filp, arg);
- case FS_IOC_SETFLAGS:
- return f2fs_ioc_setflags(filp, arg);
case FS_IOC_GETVERSION:
return f2fs_ioc_getversion(filp, arg);
case F2FS_IOC_START_ATOMIC_WRITE:
@@ -4285,10 +4157,6 @@ static long __f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
return f2fs_ioc_flush_device(filp, arg);
case F2FS_IOC_GET_FEATURES:
return f2fs_ioc_get_features(filp, arg);
- case FS_IOC_FSGETXATTR:
- return f2fs_ioc_fsgetxattr(filp, arg);
- case FS_IOC_FSSETXATTR:
- return f2fs_ioc_fssetxattr(filp, arg);
case F2FS_IOC_GET_PIN_FILE:
return f2fs_ioc_get_pin_file(filp, arg);
case F2FS_IOC_SET_PIN_FILE:
@@ -4518,12 +4386,6 @@ long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
return -ENOSPC;
switch (cmd) {
- case FS_IOC32_GETFLAGS:
- cmd = FS_IOC_GETFLAGS;
- break;
- case FS_IOC32_SETFLAGS:
- cmd = FS_IOC_SETFLAGS;
- break;
case FS_IOC32_GETVERSION:
cmd = FS_IOC_GETVERSION;
break;
@@ -4552,8 +4414,6 @@ long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
case F2FS_IOC_DEFRAGMENT:
case F2FS_IOC_FLUSH_DEVICE:
case F2FS_IOC_GET_FEATURES:
- case FS_IOC_FSGETXATTR:
- case FS_IOC_FSSETXATTR:
case F2FS_IOC_GET_PIN_FILE:
case F2FS_IOC_SET_PIN_FILE:
case F2FS_IOC_PRECACHE_EXTENTS:
diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
index 17bd072a5d39..14bf4f65bcb3 100644
--- a/fs/f2fs/namei.c
+++ b/fs/f2fs/namei.c
@@ -1327,6 +1327,8 @@ const struct inode_operations f2fs_dir_inode_operations = {
.set_acl = f2fs_set_acl,
.listxattr = f2fs_listxattr,
.fiemap = f2fs_fiemap,
+ .fileattr_get = f2fs_fileattr_get,
+ .fileattr_set = f2fs_fileattr_set,
};
const struct inode_operations f2fs_symlink_inode_operations = {
--
2.30.2