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head/sys/kern/vfs_syscalls.c
| Show First 20 Lines • Show All 4,559 Lines • ▼ Show 20 Lines | if (error != 0) | ||||
| goto out; | goto out; | ||||
| #endif | #endif | ||||
| error = VFS_STATFS(mp, buf); | error = VFS_STATFS(mp, buf); | ||||
| out: | out: | ||||
| vfs_unbusy(mp); | vfs_unbusy(mp); | ||||
| return (error); | return (error); | ||||
| } | } | ||||
| int | |||||
| kern_posix_fallocate(struct thread *td, int fd, off_t offset, off_t len) | |||||
| { | |||||
| struct file *fp; | |||||
| struct mount *mp; | |||||
| struct vnode *vp; | |||||
| off_t olen, ooffset; | |||||
| int error; | |||||
| #ifdef AUDIT | |||||
| int audited_vnode1 = 0; | |||||
| #endif | |||||
| AUDIT_ARG_FD(fd); | |||||
| if (offset < 0 || len <= 0) | |||||
| return (EINVAL); | |||||
| /* Check for wrap. */ | |||||
| if (offset > OFF_MAX - len) | |||||
| return (EFBIG); | |||||
| AUDIT_ARG_FD(fd); | |||||
| error = fget(td, fd, &cap_pwrite_rights, &fp); | |||||
| if (error != 0) | |||||
| return (error); | |||||
| AUDIT_ARG_FILE(td->td_proc, fp); | |||||
| if ((fp->f_ops->fo_flags & DFLAG_SEEKABLE) == 0) { | |||||
| error = ESPIPE; | |||||
| goto out; | |||||
| } | |||||
| if ((fp->f_flag & FWRITE) == 0) { | |||||
| error = EBADF; | |||||
| goto out; | |||||
| } | |||||
| if (fp->f_type != DTYPE_VNODE) { | |||||
| error = ENODEV; | |||||
| goto out; | |||||
| } | |||||
| vp = fp->f_vnode; | |||||
| if (vp->v_type != VREG) { | |||||
| error = ENODEV; | |||||
| goto out; | |||||
| } | |||||
| /* Allocating blocks may take a long time, so iterate. */ | |||||
| for (;;) { | |||||
| olen = len; | |||||
| ooffset = offset; | |||||
| bwillwrite(); | |||||
| mp = NULL; | |||||
| error = vn_start_write(vp, &mp, V_WAIT | PCATCH); | |||||
| if (error != 0) | |||||
| break; | |||||
| error = vn_lock(vp, LK_EXCLUSIVE); | |||||
| if (error != 0) { | |||||
| vn_finished_write(mp); | |||||
| break; | |||||
| } | |||||
| #ifdef AUDIT | |||||
| if (!audited_vnode1) { | |||||
| AUDIT_ARG_VNODE1(vp); | |||||
| audited_vnode1 = 1; | |||||
| } | |||||
| #endif | |||||
| #ifdef MAC | |||||
| error = mac_vnode_check_write(td->td_ucred, fp->f_cred, vp); | |||||
| if (error == 0) | |||||
| #endif | |||||
| error = VOP_ALLOCATE(vp, &offset, &len); | |||||
| VOP_UNLOCK(vp); | |||||
| vn_finished_write(mp); | |||||
| if (olen + ooffset != offset + len) { | |||||
| panic("offset + len changed from %jx/%jx to %jx/%jx", | |||||
| ooffset, olen, offset, len); | |||||
| } | |||||
| if (error != 0 || len == 0) | |||||
| break; | |||||
| KASSERT(olen > len, ("Iteration did not make progress?")); | |||||
| maybe_yield(); | |||||
| } | |||||
| out: | |||||
| fdrop(fp, td); | |||||
| return (error); | |||||
| } | |||||
| int | |||||
| sys_posix_fallocate(struct thread *td, struct posix_fallocate_args *uap) | |||||
| { | |||||
| int error; | |||||
| error = kern_posix_fallocate(td, uap->fd, uap->offset, uap->len); | |||||
| return (kern_posix_error(td, error)); | |||||
| } | |||||
| /* | /* | ||||
| * Unlike madvise(2), we do not make a best effort to remember every | * Unlike madvise(2), we do not make a best effort to remember every | ||||
| * possible caching hint. Instead, we remember the last setting with | * possible caching hint. Instead, we remember the last setting with | ||||
| * the exception that we will allow POSIX_FADV_NORMAL to adjust the | * the exception that we will allow POSIX_FADV_NORMAL to adjust the | ||||
| * region of any current setting. | * region of any current setting. | ||||
| */ | */ | ||||
| int | int | ||||
| kern_posix_fadvise(struct thread *td, int fd, off_t offset, off_t len, | kern_posix_fadvise(struct thread *td, int fd, off_t offset, off_t len, | ||||
| ▲ Show 20 Lines • Show All 259 Lines • Show Last 20 Lines | |||||