diff options
Diffstat (limited to 'fs/stat.c')
| -rw-r--r-- | fs/stat.c | 51 |
1 files changed, 34 insertions, 17 deletions
diff --git a/fs/stat.c b/fs/stat.c index 030008796479..44f8ad346db4 100644 --- a/fs/stat.c +++ b/fs/stat.c @@ -22,6 +22,7 @@ #include <asm/unistd.h> #include "internal.h" +#include "mount.h" /** * generic_fillattr - Fill in the basic attributes from the inode struct @@ -70,15 +71,18 @@ int vfs_getattr_nosec(const struct path *path, struct kstat *stat, memset(stat, 0, sizeof(*stat)); stat->result_mask |= STATX_BASIC_STATS; - request_mask &= STATX_ALL; query_flags &= KSTAT_QUERY_FLAGS; /* allow the fs to override these if it really wants to */ - if (IS_NOATIME(inode)) + /* SB_NOATIME means filesystem supplies dummy atime value */ + if (inode->i_sb->s_flags & SB_NOATIME) stat->result_mask &= ~STATX_ATIME; if (IS_AUTOMOUNT(inode)) stat->attributes |= STATX_ATTR_AUTOMOUNT; + if (IS_DAX(inode)) + stat->attributes |= STATX_ATTR_DAX; + if (inode->i_op->getattr) return inode->i_op->getattr(path, stat, request_mask, query_flags); @@ -152,7 +156,8 @@ int vfs_statx_fd(unsigned int fd, struct kstat *stat, } EXPORT_SYMBOL(vfs_statx_fd); -inline unsigned vfs_stat_set_lookup_flags(unsigned *lookup_flags, int flags) +static inline unsigned vfs_stat_set_lookup_flags(unsigned *lookup_flags, + int flags) { if ((flags & ~(AT_SYMLINK_NOFOLLOW | AT_NO_AUTOMOUNT | AT_EMPTY_PATH | KSTAT_QUERY_FLAGS)) != 0) @@ -199,6 +204,11 @@ retry: goto out; error = vfs_getattr(&path, stat, request_mask, flags); + stat->mnt_id = real_mount(path.mnt)->mnt_id; + stat->result_mask |= STATX_MNT_ID; + if (path.mnt->mnt_root == path.dentry) + stat->attributes |= STATX_ATTR_MOUNT_ROOT; + stat->attributes_mask |= STATX_ATTR_MOUNT_ROOT; path_put(&path); if (retry_estale(error, lookup_flags)) { lookup_flags |= LOOKUP_REVAL; @@ -533,7 +543,7 @@ SYSCALL_DEFINE4(fstatat64, int, dfd, const char __user *, filename, } #endif /* __ARCH_WANT_STAT64 || __ARCH_WANT_COMPAT_STAT64 */ -noinline_for_stack int +static noinline_for_stack int cp_statx(const struct kstat *stat, struct statx __user *buffer) { struct statx tmp; @@ -563,10 +573,29 @@ cp_statx(const struct kstat *stat, struct statx __user *buffer) tmp.stx_rdev_minor = MINOR(stat->rdev); tmp.stx_dev_major = MAJOR(stat->dev); tmp.stx_dev_minor = MINOR(stat->dev); + tmp.stx_mnt_id = stat->mnt_id; return copy_to_user(buffer, &tmp, sizeof(tmp)) ? -EFAULT : 0; } +int do_statx(int dfd, const char __user *filename, unsigned flags, + unsigned int mask, struct statx __user *buffer) +{ + struct kstat stat; + int error; + + if (mask & STATX__RESERVED) + return -EINVAL; + if ((flags & AT_STATX_SYNC_TYPE) == AT_STATX_SYNC_TYPE) + return -EINVAL; + + error = vfs_statx(dfd, filename, flags, &stat, mask); + if (error) + return error; + + return cp_statx(&stat, buffer); +} + /** * sys_statx - System call to get enhanced stats * @dfd: Base directory to pathwalk from *or* fd to stat. @@ -583,19 +612,7 @@ SYSCALL_DEFINE5(statx, unsigned int, mask, struct statx __user *, buffer) { - struct kstat stat; - int error; - - if (mask & STATX__RESERVED) - return -EINVAL; - if ((flags & AT_STATX_SYNC_TYPE) == AT_STATX_SYNC_TYPE) - return -EINVAL; - - error = vfs_statx(dfd, filename, flags, &stat, mask); - if (error) - return error; - - return cp_statx(&stat, buffer); + return do_statx(dfd, filename, flags, mask, buffer); } #ifdef CONFIG_COMPAT |