diff options
Diffstat (limited to 'fs/xfs/xfs_ioctl.c')
| -rw-r--r-- | fs/xfs/xfs_ioctl.c | 146 |
1 files changed, 129 insertions, 17 deletions
diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c index 668e8f4ccf5..4d613401a5e 100644 --- a/fs/xfs/xfs_ioctl.c +++ b/fs/xfs/xfs_ioctl.c @@ -17,32 +17,31 @@ */ #include "xfs.h" #include "xfs_fs.h" +#include "xfs_shared.h" #include "xfs_format.h" -#include "xfs_log.h" -#include "xfs_trans.h" +#include "xfs_log_format.h" +#include "xfs_trans_resv.h" #include "xfs_sb.h" #include "xfs_ag.h" -#include "xfs_alloc.h" #include "xfs_mount.h" -#include "xfs_bmap_btree.h" -#include "xfs_dinode.h" #include "xfs_inode.h" #include "xfs_ioctl.h" +#include "xfs_alloc.h" #include "xfs_rtalloc.h" #include "xfs_itable.h" #include "xfs_error.h" #include "xfs_attr.h" #include "xfs_bmap.h" #include "xfs_bmap_util.h" -#include "xfs_buf_item.h" #include "xfs_fsops.h" #include "xfs_discard.h" #include "xfs_quota.h" -#include "xfs_inode_item.h" #include "xfs_export.h" #include "xfs_trace.h" #include "xfs_icache.h" #include "xfs_symlink.h" +#include "xfs_dinode.h" +#include "xfs_trans.h" #include <linux/capability.h> #include <linux/dcache.h> @@ -641,7 +640,11 @@ xfs_ioc_space( unsigned int cmd, xfs_flock64_t *bf) { - int attr_flags = 0; + struct xfs_mount *mp = ip->i_mount; + struct xfs_trans *tp; + struct iattr iattr; + bool setprealloc = false; + bool clrprealloc = false; int error; /* @@ -661,19 +664,128 @@ xfs_ioc_space( if (!S_ISREG(inode->i_mode)) return -XFS_ERROR(EINVAL); - if (filp->f_flags & (O_NDELAY|O_NONBLOCK)) - attr_flags |= XFS_ATTR_NONBLOCK; + error = mnt_want_write_file(filp); + if (error) + return error; - if (filp->f_flags & O_DSYNC) - attr_flags |= XFS_ATTR_SYNC; + xfs_ilock(ip, XFS_IOLOCK_EXCL); + + switch (bf->l_whence) { + case 0: /*SEEK_SET*/ + break; + case 1: /*SEEK_CUR*/ + bf->l_start += filp->f_pos; + break; + case 2: /*SEEK_END*/ + bf->l_start += XFS_ISIZE(ip); + break; + default: + error = XFS_ERROR(EINVAL); + goto out_unlock; + } - if (ioflags & IO_INVIS) - attr_flags |= XFS_ATTR_DMI; + /* + * length of <= 0 for resv/unresv/zero is invalid. length for + * alloc/free is ignored completely and we have no idea what userspace + * might have set it to, so set it to zero to allow range + * checks to pass. + */ + switch (cmd) { + case XFS_IOC_ZERO_RANGE: + case XFS_IOC_RESVSP: + case XFS_IOC_RESVSP64: + case XFS_IOC_UNRESVSP: + case XFS_IOC_UNRESVSP64: + if (bf->l_len <= 0) { + error = XFS_ERROR(EINVAL); + goto out_unlock; + } + break; + default: + bf->l_len = 0; + break; + } + + if (bf->l_start < 0 || + bf->l_start > mp->m_super->s_maxbytes || + bf->l_start + bf->l_len < 0 || + bf->l_start + bf->l_len >= mp->m_super->s_maxbytes) { + error = XFS_ERROR(EINVAL); + goto out_unlock; + } + + switch (cmd) { + case XFS_IOC_ZERO_RANGE: + error = xfs_zero_file_space(ip, bf->l_start, bf->l_len); + if (!error) + setprealloc = true; + break; + case XFS_IOC_RESVSP: + case XFS_IOC_RESVSP64: + error = xfs_alloc_file_space(ip, bf->l_start, bf->l_len, + XFS_BMAPI_PREALLOC); + if (!error) + setprealloc = true; + break; + case XFS_IOC_UNRESVSP: + case XFS_IOC_UNRESVSP64: + error = xfs_free_file_space(ip, bf->l_start, bf->l_len); + break; + case XFS_IOC_ALLOCSP: + case XFS_IOC_ALLOCSP64: + case XFS_IOC_FREESP: + case XFS_IOC_FREESP64: + if (bf->l_start > XFS_ISIZE(ip)) { + error = xfs_alloc_file_space(ip, XFS_ISIZE(ip), + bf->l_start - XFS_ISIZE(ip), 0); + if (error) + goto out_unlock; + } + + iattr.ia_valid = ATTR_SIZE; + iattr.ia_size = bf->l_start; + + error = xfs_setattr_size(ip, &iattr); + if (!error) + clrprealloc = true; + break; + default: + ASSERT(0); + error = XFS_ERROR(EINVAL); + } - error = mnt_want_write_file(filp); if (error) - return error; - error = xfs_change_file_space(ip, cmd, bf, filp->f_pos, attr_flags); + goto out_unlock; + + tp = xfs_trans_alloc(mp, XFS_TRANS_WRITEID); + error = xfs_trans_reserve(tp, &M_RES(mp)->tr_writeid, 0, 0); + if (error) { + xfs_trans_cancel(tp, 0); + goto out_unlock; + } + + xfs_ilock(ip, XFS_ILOCK_EXCL); + xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL); + + if (!(ioflags & IO_INVIS)) { + ip->i_d.di_mode &= ~S_ISUID; + if (ip->i_d.di_mode & S_IXGRP) + ip->i_d.di_mode &= ~S_ISGID; + xfs_trans_ichgtime(tp, ip, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG); + } + + if (setprealloc) + ip->i_d.di_flags |= XFS_DIFLAG_PREALLOC; + else if (clrprealloc) + ip->i_d.di_flags &= ~XFS_DIFLAG_PREALLOC; + + xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE); + if (filp->f_flags & O_DSYNC) + xfs_trans_set_sync(tp); + error = xfs_trans_commit(tp, 0); + +out_unlock: + xfs_iunlock(ip, XFS_IOLOCK_EXCL); mnt_drop_write_file(filp); return -error; } |