diff options
| -rw-r--r-- | fs/xfs/libxfs/xfs_fs.h | 24 | ||||
| -rw-r--r-- | fs/xfs/xfs_ioctl.c | 98 | ||||
| -rw-r--r-- | fs/xfs/xfs_ioctl32.c | 1 | ||||
| -rw-r--r-- | fs/xfs/xfs_ondisk.h | 1 |
4 files changed, 123 insertions, 1 deletions
diff --git a/fs/xfs/libxfs/xfs_fs.h b/fs/xfs/libxfs/xfs_fs.h index 8b8fe78511fb..960f3542e207 100644 --- a/fs/xfs/libxfs/xfs_fs.h +++ b/fs/xfs/libxfs/xfs_fs.h @@ -435,7 +435,6 @@ struct xfs_fsop_bulkreq { __s32 __user *ocount; /* output count pointer */ }; - /* * Structures returned from xfs_inumbers routine (XFS_IOC_FSINUMBERS). */ @@ -457,6 +456,28 @@ struct xfs_inumbers { #define XFS_INUMBERS_VERSION_V1 (1) #define XFS_INUMBERS_VERSION_V5 (5) +/* Header for bulk inode requests. */ +struct xfs_bulk_ireq { + uint64_t ino; /* I/O: start with this inode */ + uint32_t flags; /* I/O: operation flags */ + uint32_t icount; /* I: count of entries in buffer */ + uint32_t ocount; /* O: count of entries filled out */ + uint32_t reserved32; /* must be zero */ + uint64_t reserved[5]; /* must be zero */ +}; + +#define XFS_BULK_IREQ_FLAGS_ALL (0) + +/* + * ioctl structures for v5 bulkstat and inumbers requests + */ +struct xfs_bulkstat_req { + struct xfs_bulk_ireq hdr; + struct xfs_bulkstat bulkstat[]; +}; +#define XFS_BULKSTAT_REQ_SIZE(nr) (sizeof(struct xfs_bulkstat_req) + \ + (nr) * sizeof(struct xfs_bulkstat)) + /* * Error injection. */ @@ -758,6 +779,7 @@ struct xfs_scrub_metadata { #define XFS_IOC_FSGEOMETRY_V4 _IOR ('X', 124, struct xfs_fsop_geom_v4) #define XFS_IOC_GOINGDOWN _IOR ('X', 125, uint32_t) #define XFS_IOC_FSGEOMETRY _IOR ('X', 126, struct xfs_fsop_geom) +#define XFS_IOC_BULKSTAT _IOR ('X', 127, struct xfs_bulkstat_req) /* XFS_IOC_GETFSUUID ---------- deprecated 140 */ diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c index cdec674371a8..cab6832dde22 100644 --- a/fs/xfs/xfs_ioctl.c +++ b/fs/xfs/xfs_ioctl.c @@ -818,6 +818,101 @@ xfs_ioc_fsbulkstat( return 0; } +/* Return 0 on success or positive error */ +static int +xfs_bulkstat_fmt( + struct xfs_ibulk *breq, + const struct xfs_bulkstat *bstat) +{ + if (copy_to_user(breq->ubuffer, bstat, sizeof(struct xfs_bulkstat))) + return -EFAULT; + return xfs_ibulk_advance(breq, sizeof(struct xfs_bulkstat)); +} + +/* + * Check the incoming bulk request @hdr from userspace and initialize the + * internal @breq bulk request appropriately. Returns 0 if the bulk request + * should proceed; XFS_ITER_ABORT if there's nothing to do; or the usual + * negative error code. + */ +static int +xfs_bulk_ireq_setup( + struct xfs_mount *mp, + struct xfs_bulk_ireq *hdr, + struct xfs_ibulk *breq, + void __user *ubuffer) +{ + if (hdr->icount == 0 || + (hdr->flags & ~XFS_BULK_IREQ_FLAGS_ALL) || + hdr->reserved32 || + memchr_inv(hdr->reserved, 0, sizeof(hdr->reserved))) + return -EINVAL; + + breq->startino = hdr->ino; + breq->ubuffer = ubuffer; + breq->icount = hdr->icount; + breq->ocount = 0; + + /* Asking for an inode past the end of the FS? We're done! */ + if (XFS_INO_TO_AGNO(mp, breq->startino) >= mp->m_sb.sb_agcount) + return XFS_ITER_ABORT; + + return 0; +} + +/* + * Update the userspace bulk request @hdr to reflect the end state of the + * internal bulk request @breq. + */ +static void +xfs_bulk_ireq_teardown( + struct xfs_bulk_ireq *hdr, + struct xfs_ibulk *breq) +{ + hdr->ino = breq->startino; + hdr->ocount = breq->ocount; +} + +/* Handle the v5 bulkstat ioctl. */ +STATIC int +xfs_ioc_bulkstat( + struct xfs_mount *mp, + unsigned int cmd, + struct xfs_bulkstat_req __user *arg) +{ + struct xfs_bulk_ireq hdr; + struct xfs_ibulk breq = { + .mp = mp, + }; + int error; + + if (!capable(CAP_SYS_ADMIN)) + return -EPERM; + + if (XFS_FORCED_SHUTDOWN(mp)) + return -EIO; + + if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr))) + return -EFAULT; + + error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->bulkstat); + if (error == XFS_ITER_ABORT) + goto out_teardown; + if (error < 0) + return error; + + error = xfs_bulkstat(&breq, xfs_bulkstat_fmt); + if (error) + return error; + +out_teardown: + xfs_bulk_ireq_teardown(&hdr, &breq); + if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr))) + return -EFAULT; + + return 0; +} + STATIC int xfs_ioc_fsgeometry( struct xfs_mount *mp, @@ -1982,6 +2077,9 @@ xfs_file_ioctl( case XFS_IOC_FSINUMBERS: return xfs_ioc_fsbulkstat(mp, cmd, arg); + case XFS_IOC_BULKSTAT: + return xfs_ioc_bulkstat(mp, cmd, arg); + case XFS_IOC_FSGEOMETRY_V1: return xfs_ioc_fsgeometry(mp, arg, 3); case XFS_IOC_FSGEOMETRY_V4: diff --git a/fs/xfs/xfs_ioctl32.c b/fs/xfs/xfs_ioctl32.c index ca734381a557..a98a505967ce 100644 --- a/fs/xfs/xfs_ioctl32.c +++ b/fs/xfs/xfs_ioctl32.c @@ -574,6 +574,7 @@ xfs_file_compat_ioctl( case XFS_IOC_ERROR_CLEARALL: case FS_IOC_GETFSMAP: case XFS_IOC_SCRUB_METADATA: + case XFS_IOC_BULKSTAT: return xfs_file_ioctl(filp, cmd, p); #if !defined(BROKEN_X86_ALIGNMENT) || defined(CONFIG_X86_X32) /* diff --git a/fs/xfs/xfs_ondisk.h b/fs/xfs/xfs_ondisk.h index d8f941b4d51c..954484c6eb96 100644 --- a/fs/xfs/xfs_ondisk.h +++ b/fs/xfs/xfs_ondisk.h @@ -149,6 +149,7 @@ xfs_check_ondisk_structs(void) XFS_CHECK_STRUCT_SIZE(struct xfs_bulkstat, 192); XFS_CHECK_STRUCT_SIZE(struct xfs_inumbers, 24); + XFS_CHECK_STRUCT_SIZE(struct xfs_bulkstat_req, 64); } #endif /* __XFS_ONDISK_H */ |